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firefox/editor/libeditor/HTMLEditorDeleteHandler.cpp
Daniel Baumann 5e9a113729
Adding upstream version 140.0. 
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
2025-06-25 09:37:52 +02:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "HTMLEditor.h"
#include "HTMLEditorNestedClasses.h"
#include <utility>
#include "AutoClonedRangeArray.h"
#include "CSSEditUtils.h"
#include "EditAction.h"
#include "EditorDOMPoint.h"
#include "EditorLineBreak.h"
#include "EditorUtils.h"
#include "HTMLEditHelpers.h"
#include "HTMLEditorInlines.h"
#include "HTMLEditUtils.h"
#include "WhiteSpaceVisibilityKeeper.h"
#include "WSRunScanner.h"
#include "ErrorList.h"
#include "mozilla/Assertions.h"
#include "mozilla/ContentIterator.h"
#include "mozilla/InternalMutationEvent.h"
#include "mozilla/Logging.h"
#include "mozilla/Maybe.h"
#include "mozilla/OwningNonNull.h"
#include "mozilla/SelectionState.h"
#include "mozilla/StaticPrefs_editor.h" // for StaticPrefs::editor_*
#include "mozilla/Unused.h"
#include "mozilla/dom/AncestorIterator.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/ElementInlines.h" // for Element::IsContentEditablePlainTextOnly
#include "mozilla/dom/HTMLBRElement.h"
#include "mozilla/dom/Selection.h"
#include "nsAtom.h"
#include "nsComputedDOMStyle.h" // for nsComputedDOMStyle
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsFrameSelection.h"
#include "nsGkAtoms.h"
#include "nsIContent.h"
#include "nsINode.h"
#include "nsRange.h"
#include "nsString.h"
#include "nsStringFwd.h"
#include "nsStyleConsts.h" // for StyleWhiteSpace
#include "nsTArray.h"
// NOTE: This file was split from:
// https://searchfox.org/mozilla-central/rev/c409dd9235c133ab41eba635f906aa16e050c197/editor/libeditor/HTMLEditSubActionHandler.cpp
namespace mozilla {
using namespace dom;
using EmptyCheckOption = HTMLEditUtils::EmptyCheckOption;
using InvisibleWhiteSpaces = HTMLEditUtils::InvisibleWhiteSpaces;
using LeafNodeType = HTMLEditUtils::LeafNodeType;
using ScanLineBreak = HTMLEditUtils::ScanLineBreak;
using TableBoundary = HTMLEditUtils::TableBoundary;
using WalkTreeOption = HTMLEditUtils::WalkTreeOption;
static LazyLogModule gOneLineMoverLog("AutoMoveOneLineHandler");
template Result<CaretPoint, nsresult>
HTMLEditor::DeleteTextAndTextNodesWithTransaction(
const EditorDOMPoint& aStartPoint, const EditorDOMPoint& aEndPoint,
TreatEmptyTextNodes aTreatEmptyTextNodes);
template Result<CaretPoint, nsresult>
HTMLEditor::DeleteTextAndTextNodesWithTransaction(
const EditorDOMPointInText& aStartPoint,
const EditorDOMPointInText& aEndPoint,
TreatEmptyTextNodes aTreatEmptyTextNodes);
/*****************************************************************************
* AutoDeleteRangesHandler
****************************************************************************/
class MOZ_STACK_CLASS HTMLEditor::AutoDeleteRangesHandler final {
public:
explicit AutoDeleteRangesHandler(
const AutoDeleteRangesHandler* aParent = nullptr)
: mParent(aParent),
mOriginalDirectionAndAmount(nsIEditor::eNone),
mOriginalStripWrappers(nsIEditor::eNoStrip) {}
/**
* ComputeRangesToDelete() computes actual deletion ranges.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult ComputeRangesToDelete(
const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
const Element& aEditingHost);
/**
* Deletes content in or around aRangesToDelete.
* NOTE: This method creates SelectionBatcher. Therefore, each caller
* needs to check if the editor is still available even if this returns
* NS_OK.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult> Run(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
AutoClonedSelectionRangeArray& aRangesToDelete,
const Element& aEditingHost);
private:
[[nodiscard]] bool IsHandlingRecursively() const {
return mParent != nullptr;
}
[[nodiscard]] bool CanFallbackToDeleteRangeWithTransaction(
const nsRange& aRangeToDelete) const {
return !IsHandlingRecursively() &&
(!aRangeToDelete.Collapsed() ||
EditorBase::HowToHandleCollapsedRangeFor(
mOriginalDirectionAndAmount) !=
EditorBase::HowToHandleCollapsedRange::Ignore);
}
[[nodiscard]] bool CanFallbackToDeleteRangesWithTransaction(
const AutoClonedSelectionRangeArray& aRangesToDelete) const {
return !IsHandlingRecursively() && !aRangesToDelete.Ranges().IsEmpty() &&
(!aRangesToDelete.IsCollapsed() ||
EditorBase::HowToHandleCollapsedRangeFor(
mOriginalDirectionAndAmount) !=
EditorBase::HowToHandleCollapsedRange::Ignore);
}
/**
* HandleDeleteAroundCollapsedRanges() handles deletion with collapsed
* ranges. Callers must guarantee that this is called only when
* aRangesToDelete.IsCollapsed() returns true.
*
* @param aDirectionAndAmount Direction of the deletion.
* @param aStripWrappers Must be eStrip or eNoStrip.
* @param aRangesToDelete Ranges to delete. This `IsCollapsed()` must
* return true.
* @param aWSRunScannerAtCaret Scanner instance which scanned from
* caret point.
* @param aScanFromCaretPointResult Scan result of aWSRunScannerAtCaret
* toward aDirectionAndAmount.
* @param aEditingHost The editing host.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult>
HandleDeleteAroundCollapsedRanges(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
AutoClonedSelectionRangeArray& aRangesToDelete,
const WSRunScanner& aWSRunScannerAtCaret,
const WSScanResult& aScanFromCaretPointResult,
const Element& aEditingHost);
nsresult ComputeRangesToDeleteAroundCollapsedRanges(
const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
const WSRunScanner& aWSRunScannerAtCaret,
const WSScanResult& aScanFromCaretPointResult,
const Element& aEditingHost) const;
/**
* HandleDeleteNonCollapsedRanges() handles deletion with non-collapsed
* ranges. Callers must guarantee that this is called only when
* aRangesToDelete.IsCollapsed() returns false.
*
* @param aDirectionAndAmount Direction of the deletion.
* @param aStripWrappers Must be eStrip or eNoStrip.
* @param aRangesToDelete The ranges to delete.
* @param aSelectionWasCollapsed If the caller extended `Selection`
* from collapsed, set this to `Yes`.
* Otherwise, i.e., `Selection` is not
* collapsed from the beginning, set
* this to `No`.
* @param aEditingHost The editing host.
*/
enum class SelectionWasCollapsed { Yes, No };
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult>
HandleDeleteNonCollapsedRanges(HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
AutoClonedSelectionRangeArray& aRangesToDelete,
SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost);
nsresult ComputeRangesToDeleteNonCollapsedRanges(
const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost) const;
/**
* Handle deletion of collapsed ranges in a text node.
*
* @param aDirectionAndAmount Must be eNext or ePrevious.
* @param aCaretPosition The position where caret is. This container
* must be a text node.
* @param aEditingHost The editing host.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CaretPoint, nsresult>
HandleDeleteTextAroundCollapsedRanges(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
const Element& aEditingHost);
nsresult ComputeRangesToDeleteTextAroundCollapsedRanges(
nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete) const;
/**
* Handles deletion of collapsed selection at white-spaces in a text node.
*
* @param aDirectionAndAmount Direction of the deletion.
* @param aPointToDelete The point to delete. I.e., typically, caret
* position.
* @param aEditingHost The editing host.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CaretPoint, nsresult>
HandleDeleteCollapsedSelectionAtWhiteSpaces(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPoint& aPointToDelete, const Element& aEditingHost);
/**
* Handle deletion of collapsed selection in a text node.
*
* @param aDirectionAndAmount Direction of the deletion.
* @param aRangesToDelete Computed selection ranges to delete.
* @param aPointAtDeletingChar The visible char position which you want to
* delete.
* @param aEditingHost The editing host.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CaretPoint, nsresult>
HandleDeleteCollapsedSelectionAtVisibleChar(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
const EditorDOMPoint& aPointAtDeletingChar, const Element& aEditingHost);
/**
* Handle deletion of atomic elements like <br>, <hr>, <img>, <input>, etc and
* data nodes except text node (e.g., comment node). Note that don't call this
* directly with `<hr>` element.
*
* @param aAtomicContent The atomic content to be deleted.
* @param aCaretPoint The caret point (i.e., selection start or
* end).
* @param aWSRunScannerAtCaret WSRunScanner instance which was initialized
* with the caret point.
* @param aEditingHost The editing host.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CaretPoint, nsresult>
HandleDeleteAtomicContent(HTMLEditor& aHTMLEditor, nsIContent& aAtomicContent,
const EditorDOMPoint& aCaretPoint,
const WSRunScanner& aWSRunScannerAtCaret,
const Element& aEditingHost);
nsresult ComputeRangesToDeleteAtomicContent(
const nsIContent& aAtomicContent,
AutoClonedSelectionRangeArray& aRangesToDelete) const;
/**
* GetAtomicContnetToDelete() returns better content that is deletion of
* atomic element. If aScanFromCaretPointResult is special, since this
* point may not be editable, we look for better point to remove atomic
* content.
*
* @param aDirectionAndAmount Direction of the deletion.
* @param aWSRunScannerAtCaret WSRunScanner instance which was
* initialized with the caret point.
* @param aScanFromCaretPointResult Scan result of aWSRunScannerAtCaret
* toward aDirectionAndAmount.
*/
static nsIContent* GetAtomicContentToDelete(
nsIEditor::EDirection aDirectionAndAmount,
const WSRunScanner& aWSRunScannerAtCaret,
const WSScanResult& aScanFromCaretPointResult) MOZ_NONNULL_RETURN;
/**
* HandleDeleteAtOtherBlockBoundary() handles deletion at other block boundary
* (i.e., immediately before or after a block). If this does not join blocks,
* `Run()` may be called recursively with creating another instance.
*
* @param aDirectionAndAmount Direction of the deletion.
* @param aStripWrappers Must be eStrip or eNoStrip.
* @param aOtherBlockElement The block element which follows the caret or
* is followed by caret.
* @param aCaretPoint The caret point (i.e., selection start or
* end).
* @param aWSRunScannerAtCaret WSRunScanner instance which was initialized
* with the caret point.
* @param aRangesToDelete Ranges to delete of the caller. This should
* be collapsed and the point should match with
* aCaretPoint.
* @param aEditingHost The editing host.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult>
HandleDeleteAtOtherBlockBoundary(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers, Element& aOtherBlockElement,
const EditorDOMPoint& aCaretPoint, WSRunScanner& aWSRunScannerAtCaret,
AutoClonedSelectionRangeArray& aRangesToDelete,
const Element& aEditingHost);
/**
* ExtendOrShrinkRangeToDelete() extends aRangeToDelete if there are
* an invisible <br> element and/or some parent empty elements.
*
* @param aLimitersAndCaretData The frame selection data.
* @param aRangeToDelete The range to be extended for deletion. This
* must not be collapsed, must be positioned.
*/
template <typename EditorDOMRangeType>
Result<EditorRawDOMRange, nsresult> ExtendOrShrinkRangeToDelete(
const HTMLEditor& aHTMLEditor,
const LimitersAndCaretData& aLimitersAndCaretData,
const EditorDOMRangeType& aRangeToDelete) const;
/**
* Extend the start boundary of aRangeToDelete to contain ancestor inline
* elements which will be empty once the content in aRangeToDelete is removed
* from the tree.
*
* NOTE: This is designed for deleting inline elements which become empty if
* aRangeToDelete which crosses a block boundary of right block child.
* Therefore, you may need to improve this method if you want to use this in
* the other cases.
*
* @param aRangeToDelete [in/out] The range to delete. This start
* boundary may be modified.
* @param aEditingHost The editing host.
* @return true if aRangeToDelete is modified.
* false if aRangeToDelete is not modified.
* error if aRangeToDelete gets unexpected
* situation.
*/
static Result<bool, nsresult>
ExtendRangeToContainAncestorInlineElementsAtStart(
nsRange& aRangeToDelete, const Element& aEditingHost);
/**
* A helper method for ExtendOrShrinkRangeToDelete(). This returns shrunken
* range if aRangeToDelete selects all over list elements which have some list
* item elements to avoid to delete all list items from the list element.
*/
MOZ_NEVER_INLINE_DEBUG static EditorRawDOMRange
GetRangeToAvoidDeletingAllListItemsIfSelectingAllOverListElements(
const EditorRawDOMRange& aRangeToDelete);
/**
* DeleteUnnecessaryNodes() removes unnecessary nodes around aRange.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
DeleteUnnecessaryNodes(HTMLEditor& aHTMLEditor, const EditorDOMRange& aRange,
const Element& aEditingHost);
/**
* If aContent is a text node that contains only collapsed white-space or
* empty and editable.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
DeleteNodeIfInvisibleAndEditableTextNode(HTMLEditor& aHTMLEditor,
nsIContent& aContent);
/**
* DeleteParentBlocksIfEmpty() removes parent block elements if they
* don't have visible contents. Note that due performance issue of
* WhiteSpaceVisibilityKeeper, this call may be expensive. And also note that
* this removes a empty block with a transaction. So, please make sure that
* you've already created `AutoPlaceholderBatch`.
*
* @param aPoint The point whether this method climbing up the DOM
* tree to remove empty parent blocks.
* @return NS_OK if one or more empty block parents are deleted.
* NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND if the point is
* not in empty block.
* Or NS_ERROR_* if something unexpected occurs.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
DeleteParentBlocksWithTransactionIfEmpty(HTMLEditor& aHTMLEditor,
const EditorDOMPoint& aPoint);
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CaretPoint, nsresult>
FallbackToDeleteRangeWithTransaction(HTMLEditor& aHTMLEditor,
nsRange& aRangeToDelete) const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(CanFallbackToDeleteRangeWithTransaction(aRangeToDelete));
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteRangeWithTransaction(mOriginalDirectionAndAmount,
mOriginalStripWrappers,
aRangeToDelete);
NS_WARNING_ASSERTION(caretPointOrError.isOk(),
"EditorBase::DeleteRangeWithTransaction() failed");
return caretPointOrError;
}
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CaretPoint, nsresult>
FallbackToDeleteRangesWithTransaction(
HTMLEditor& aHTMLEditor, AutoClonedSelectionRangeArray& aRangesToDelete,
const Element& aEditingHost) const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(CanFallbackToDeleteRangesWithTransaction(aRangesToDelete));
const auto stripWrappers = [&]() -> nsIEditor::EStripWrappers {
if (mOriginalStripWrappers == nsIEditor::eStrip &&
aEditingHost.IsContentEditablePlainTextOnly()) {
return nsIEditor::eNoStrip;
}
return mOriginalStripWrappers;
}();
if (StaticPrefs::editor_white_space_normalization_blink_compatible()) {
{
AutoTrackDOMRange firstRangeTracker(aHTMLEditor.RangeUpdaterRef(),
&aRangesToDelete.FirstRangeRef());
for (OwningNonNull<nsRange>& range :
Reversed(aRangesToDelete.Ranges())) {
if (MOZ_UNLIKELY(!range->IsPositioned() || range->Collapsed())) {
continue;
}
Maybe<AutoTrackDOMRange> trackRange;
if (range != aRangesToDelete.FirstRangeRef()) {
trackRange.emplace(aHTMLEditor.RangeUpdaterRef(), &range);
}
Result<EditorDOMRange, nsresult> rangeToDeleteOrError =
WhiteSpaceVisibilityKeeper::NormalizeSurroundingWhiteSpacesToJoin(
aHTMLEditor, EditorDOMRange(range));
if (MOZ_UNLIKELY(rangeToDeleteOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::"
"NormalizeSurroundingWhiteSpacesToJoin() failed");
return rangeToDeleteOrError.propagateErr();
}
trackRange.reset();
EditorDOMRange rangeToDelete = rangeToDeleteOrError.unwrap();
if (MOZ_LIKELY(rangeToDelete.IsPositionedAndValidInComposedDoc())) {
nsresult rv = range->SetStartAndEnd(
rangeToDelete.StartRef().ToRawRangeBoundary(),
rangeToDelete.EndRef().ToRawRangeBoundary());
if (NS_FAILED(rv)) {
NS_WARNING("nsRange::SetStartAndEnd() failed");
return Err(rv);
}
}
}
}
aRangesToDelete.RemoveCollapsedRanges();
if (MOZ_UNLIKELY(aRangesToDelete.IsCollapsed())) {
return CaretPoint(
EditorDOMPoint(aRangesToDelete.FirstRangeRef()->StartRef()));
}
}
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteRangesWithTransaction(mOriginalDirectionAndAmount,
stripWrappers, aRangesToDelete);
NS_WARNING_ASSERTION(caretPointOrError.isOk(),
"HTMLEditor::DeleteRangesWithTransaction() failed");
return caretPointOrError;
}
/**
* Compute target range(s) which will be called by
* `EditorBase::DeleteRangeWithTransaction()` or
* `HTMLEditor::DeleteRangesWithTransaction()`.
* TODO: We should not use it for consistency with each deletion handler
* in this and nested classes.
*/
nsresult ComputeRangeToDeleteRangeWithTransaction(
const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsRange& aRange, const Element& aEditingHost) const;
nsresult ComputeRangesToDeleteRangesWithTransaction(
const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
const Element& aEditingHost) const {
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
const EditorBase::HowToHandleCollapsedRange howToHandleCollapsedRange =
EditorBase::HowToHandleCollapsedRangeFor(aDirectionAndAmount);
if (NS_WARN_IF(aRangesToDelete.IsCollapsed() &&
howToHandleCollapsedRange ==
EditorBase::HowToHandleCollapsedRange::Ignore)) {
return NS_ERROR_FAILURE;
}
const auto stripWrappers = [&]() -> nsIEditor::EStripWrappers {
if (mOriginalStripWrappers == nsIEditor::eStrip &&
aEditingHost.IsContentEditablePlainTextOnly()) {
return nsIEditor::eNoStrip;
}
return mOriginalStripWrappers;
}();
aRangesToDelete.ExtendRangeToContainSurroundingInvisibleWhiteSpaces(
stripWrappers);
if (MOZ_UNLIKELY(aRangesToDelete.IsCollapsed() &&
howToHandleCollapsedRange ==
EditorBase::HowToHandleCollapsedRange::Ignore)) {
return NS_OK;
}
for (const OwningNonNull<nsRange>& range : aRangesToDelete.Ranges()) {
if (range->Collapsed()) {
continue;
}
nsresult rv = ComputeRangeToDeleteRangeWithTransaction(
aHTMLEditor, aDirectionAndAmount, range, aEditingHost);
if (NS_FAILED(rv)) {
NS_WARNING(
"AutoDeleteRangesHandler::ComputeRangeToDeleteRangeWithTransaction("
") failed");
return rv;
}
}
return NS_OK;
}
nsresult FallbackToComputeRangeToDeleteRangeWithTransaction(
const HTMLEditor& aHTMLEditor, nsRange& aRangeToDelete,
const Element& aEditingHost) const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(CanFallbackToDeleteRangeWithTransaction(aRangeToDelete));
nsresult rv = ComputeRangeToDeleteRangeWithTransaction(
aHTMLEditor, mOriginalDirectionAndAmount, aRangeToDelete, aEditingHost);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::"
"ComputeRangeToDeleteRangeWithTransaction() failed");
return rv;
}
nsresult FallbackToComputeRangesToDeleteRangesWithTransaction(
const HTMLEditor& aHTMLEditor,
AutoClonedSelectionRangeArray& aRangesToDelete,
const Element& aEditingHost) const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(CanFallbackToDeleteRangesWithTransaction(aRangesToDelete));
nsresult rv = ComputeRangesToDeleteRangesWithTransaction(
aHTMLEditor, mOriginalDirectionAndAmount, aRangesToDelete,
aEditingHost);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::"
"ComputeRangesToDeleteRangesWithTransaction() failed");
return rv;
}
class MOZ_STACK_CLASS AutoBlockElementsJoiner final {
public:
AutoBlockElementsJoiner() = delete;
explicit AutoBlockElementsJoiner(
AutoDeleteRangesHandler& aDeleteRangesHandler)
: mDeleteRangesHandler(&aDeleteRangesHandler),
mDeleteRangesHandlerConst(aDeleteRangesHandler) {}
explicit AutoBlockElementsJoiner(
const AutoDeleteRangesHandler& aDeleteRangesHandler)
: mDeleteRangesHandler(nullptr),
mDeleteRangesHandlerConst(aDeleteRangesHandler) {}
/**
* PrepareToDeleteAtCurrentBlockBoundary() considers left content and right
* content which are joined for handling deletion at current block boundary
* (i.e., at start or end of the current block).
*
* @param aHTMLEditor The HTML editor.
* @param aDirectionAndAmount Direction of the deletion.
* @param aCurrentBlockElement The current block element.
* @param aCaretPoint The caret point (i.e., selection start
* or end).
* @param aEditingHost The editing host.
* @return true if can continue to handle the
* deletion.
*/
bool PrepareToDeleteAtCurrentBlockBoundary(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount,
Element& aCurrentBlockElement, const EditorDOMPoint& aCaretPoint,
const Element& aEditingHost);
/**
* PrepareToDeleteAtOtherBlockBoundary() considers left content and right
* content which are joined for handling deletion at other block boundary
* (i.e., immediately before or after a block).
*
* @param aHTMLEditor The HTML editor.
* @param aDirectionAndAmount Direction of the deletion.
* @param aOtherBlockElement The block element which follows the
* caret or is followed by caret.
* @param aCaretPoint The caret point (i.e., selection start
* or end).
* @param aWSRunScannerAtCaret WSRunScanner instance which was
* initialized with the caret point.
* @return true if can continue to handle the
* deletion.
*/
bool PrepareToDeleteAtOtherBlockBoundary(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount, Element& aOtherBlockElement,
const EditorDOMPoint& aCaretPoint,
const WSRunScanner& aWSRunScannerAtCaret);
/**
* PrepareToDeleteNonCollapsedRange() considers left block element and
* right block element which are inclusive ancestor block element of
* start and end container of aRangeToDelete
*
* @param aHTMLEditor The HTML editor.
* @param aRangeToDelete The range to delete. Must not be
* collapsed.
* @param aEditingHost The editing host.
* @return true if can continue to handle the
* deletion.
*/
bool PrepareToDeleteNonCollapsedRange(const HTMLEditor& aHTMLEditor,
const nsRange& aRangeToDelete,
const Element& aEditingHost);
/**
* Run() executes the joining.
*
* @param aHTMLEditor The HTML editor.
* @param aDirectionAndAmount Direction of the deletion.
* @param aStripWrappers Must be eStrip or eNoStrip.
* @param aCaretPoint The caret point (i.e., selection start
* or end).
* @param aRangeToDelete The range to delete. This should be
* collapsed and match with aCaretPoint.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult> Run(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
const EditorDOMPoint& aCaretPoint, nsRange& aRangeToDelete,
const Element& aEditingHost) {
switch (mMode) {
case Mode::JoinCurrentBlock: {
Result<EditActionResult, nsresult> result =
HandleDeleteAtCurrentBlockBoundary(
aHTMLEditor, aDirectionAndAmount, aCaretPoint, aEditingHost);
NS_WARNING_ASSERTION(result.isOk(),
"AutoBlockElementsJoiner::"
"HandleDeleteAtCurrentBlockBoundary() failed");
return result;
}
case Mode::JoinOtherBlock: {
Result<EditActionResult, nsresult> result =
HandleDeleteAtOtherBlockBoundary(aHTMLEditor, aDirectionAndAmount,
aStripWrappers, aCaretPoint,
aRangeToDelete, aEditingHost);
NS_WARNING_ASSERTION(result.isOk(),
"AutoBlockElementsJoiner::"
"HandleDeleteAtOtherBlockBoundary() failed");
return result;
}
case Mode::DeleteBRElement:
case Mode::DeletePrecedingBRElementOfBlock:
case Mode::DeletePrecedingPreformattedLineBreak: {
Result<EditActionResult, nsresult> result = HandleDeleteLineBreak(
aHTMLEditor, aDirectionAndAmount, aCaretPoint, aEditingHost);
NS_WARNING_ASSERTION(
result.isOk(),
"AutoBlockElementsJoiner::HandleDeleteLineBreak() failed");
return result;
}
case Mode::JoinBlocksInSameParent:
case Mode::DeleteContentInRange:
case Mode::DeleteNonCollapsedRange:
case Mode::DeletePrecedingLinesAndContentInRange:
MOZ_ASSERT_UNREACHABLE(
"This mode should be handled in the other Run()");
return Err(NS_ERROR_UNEXPECTED);
case Mode::NotInitialized:
return EditActionResult::IgnoredResult();
}
return Err(NS_ERROR_NOT_INITIALIZED);
}
nsresult ComputeRangeToDelete(const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPoint& aCaretPoint,
nsRange& aRangeToDelete,
const Element& aEditingHost) const {
switch (mMode) {
case Mode::JoinCurrentBlock: {
nsresult rv = ComputeRangeToDeleteAtCurrentBlockBoundary(
aHTMLEditor, aCaretPoint, aRangeToDelete, aEditingHost);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoBlockElementsJoiner::"
"ComputeRangeToDeleteAtCurrentBlockBoundary() failed");
return rv;
}
case Mode::JoinOtherBlock: {
nsresult rv = ComputeRangeToDeleteAtOtherBlockBoundary(
aHTMLEditor, aDirectionAndAmount, aCaretPoint, aRangeToDelete,
aEditingHost);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoBlockElementsJoiner::"
"ComputeRangeToDeleteAtOtherBlockBoundary() failed");
return rv;
}
case Mode::DeleteBRElement:
case Mode::DeletePrecedingBRElementOfBlock:
case Mode::DeletePrecedingPreformattedLineBreak: {
nsresult rv = ComputeRangeToDeleteLineBreak(
aHTMLEditor, aRangeToDelete, aEditingHost,
ComputeRangeFor::GetTargetRanges);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoBlockElementsJoiner::"
"ComputeRangeToDeleteLineBreak() failed");
return rv;
}
case Mode::JoinBlocksInSameParent:
case Mode::DeleteContentInRange:
case Mode::DeleteNonCollapsedRange:
case Mode::DeletePrecedingLinesAndContentInRange:
MOZ_ASSERT_UNREACHABLE(
"This mode should be handled in the other "
"ComputeRangesToDelete()");
return NS_ERROR_UNEXPECTED;
case Mode::NotInitialized:
return NS_OK;
}
return NS_ERROR_NOT_IMPLEMENTED;
}
/**
* Run() executes the joining.
*
* @param aHTMLEditor The HTML editor.
* @param aLimitersAndCaretData The data copied from nsFrameSelection.
* @param aDirectionAndAmount Direction of the deletion.
* @param aStripWrappers Whether delete or keep new empty
* ancestor elements.
* @param aRangeToDelete The range to delete. Must not be
* collapsed.
* @param aSelectionWasCollapsed Whether selection was or was not
* collapsed when starting to handle
* deletion.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult> Run(
HTMLEditor& aHTMLEditor,
const LimitersAndCaretData& aLimitersAndCaretData,
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers, nsRange& aRangeToDelete,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost) {
switch (mMode) {
case Mode::JoinCurrentBlock:
case Mode::JoinOtherBlock:
case Mode::DeleteBRElement:
case Mode::DeletePrecedingBRElementOfBlock:
case Mode::DeletePrecedingPreformattedLineBreak:
MOZ_ASSERT_UNREACHABLE(
"This mode should be handled in the other Run()");
return Err(NS_ERROR_UNEXPECTED);
case Mode::JoinBlocksInSameParent: {
Result<EditActionResult, nsresult> result =
JoinBlockElementsInSameParent(
aHTMLEditor, aLimitersAndCaretData, aDirectionAndAmount,
aStripWrappers, aRangeToDelete, aSelectionWasCollapsed,
aEditingHost);
NS_WARNING_ASSERTION(result.isOk(),
"AutoBlockElementsJoiner::"
"JoinBlockElementsInSameParent() failed");
return result;
}
case Mode::DeleteContentInRange: {
Result<EditActionResult, nsresult> result = DeleteContentInRange(
aHTMLEditor, aLimitersAndCaretData, aDirectionAndAmount,
aStripWrappers, aRangeToDelete, aEditingHost);
NS_WARNING_ASSERTION(
result.isOk(),
"AutoBlockElementsJoiner::DeleteContentInRange() failed");
return result;
}
case Mode::DeleteNonCollapsedRange:
case Mode::DeletePrecedingLinesAndContentInRange: {
Result<EditActionResult, nsresult> result =
HandleDeleteNonCollapsedRange(
aHTMLEditor, aDirectionAndAmount, aStripWrappers,
aRangeToDelete, aSelectionWasCollapsed, aEditingHost);
NS_WARNING_ASSERTION(result.isOk(),
"AutoBlockElementsJoiner::"
"HandleDeleteNonCollapsedRange() failed");
return result;
}
case Mode::NotInitialized:
MOZ_ASSERT_UNREACHABLE(
"Call Run() after calling a preparation method");
return EditActionResult::IgnoredResult();
}
return Err(NS_ERROR_NOT_INITIALIZED);
}
nsresult ComputeRangeToDelete(
const HTMLEditor& aHTMLEditor,
const AutoClonedSelectionRangeArray& aRangesToDelete,
nsIEditor::EDirection aDirectionAndAmount, nsRange& aRangeToDelete,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost) const {
switch (mMode) {
case Mode::JoinCurrentBlock:
case Mode::JoinOtherBlock:
case Mode::DeleteBRElement:
case Mode::DeletePrecedingBRElementOfBlock:
case Mode::DeletePrecedingPreformattedLineBreak:
MOZ_ASSERT_UNREACHABLE(
"This mode should be handled in the other "
"ComputeRangesToDelete()");
return NS_ERROR_UNEXPECTED;
case Mode::JoinBlocksInSameParent: {
nsresult rv = ComputeRangeToJoinBlockElementsInSameParent(
aHTMLEditor, aDirectionAndAmount, aRangeToDelete, aEditingHost);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoBlockElementsJoiner::"
"ComputeRangesToJoinBlockElementsInSameParent() failed");
return rv;
}
case Mode::DeleteContentInRange: {
nsresult rv = ComputeRangeToDeleteContentInRange(
aHTMLEditor, aDirectionAndAmount, aRangeToDelete, aEditingHost);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoBlockElementsJoiner::"
"ComputeRangesToDeleteContentInRanges() failed");
return rv;
}
case Mode::DeleteNonCollapsedRange:
case Mode::DeletePrecedingLinesAndContentInRange: {
nsresult rv = ComputeRangeToDeleteNonCollapsedRange(
aHTMLEditor, aDirectionAndAmount, aRangeToDelete,
aSelectionWasCollapsed, aEditingHost);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoBlockElementsJoiner::"
"ComputeRangesToDeleteNonCollapsedRanges() failed");
return rv;
}
case Mode::NotInitialized:
MOZ_ASSERT_UNREACHABLE(
"Call ComputeRangesToDelete() after calling a preparation "
"method");
return NS_ERROR_NOT_INITIALIZED;
}
return NS_ERROR_NOT_INITIALIZED;
}
nsIContent* GetLeafContentInOtherBlockElement() const {
MOZ_ASSERT(mMode == Mode::JoinOtherBlock);
return mLeafContentInOtherBlock;
}
private:
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult>
HandleDeleteAtCurrentBlockBoundary(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPoint& aCaretPoint, const Element& aEditingHost);
nsresult ComputeRangeToDeleteAtCurrentBlockBoundary(
const HTMLEditor& aHTMLEditor, const EditorDOMPoint& aCaretPoint,
nsRange& aRangeToDelete, const Element& aEditingHost) const;
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult>
HandleDeleteAtOtherBlockBoundary(HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
const EditorDOMPoint& aCaretPoint,
nsRange& aRangeToDelete,
const Element& aEditingHost);
// FYI: This method may modify selection, but it won't cause running
// script because of `AutoHideSelectionChanges` which blocks
// selection change listeners and the selection change event
// dispatcher.
MOZ_CAN_RUN_SCRIPT_BOUNDARY nsresult
ComputeRangeToDeleteAtOtherBlockBoundary(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPoint& aCaretPoint, nsRange& aRangeToDelete,
const Element& aEditingHost) const;
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult>
JoinBlockElementsInSameParent(
HTMLEditor& aHTMLEditor,
const LimitersAndCaretData& aLimitersAndCaretData,
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers, nsRange& aRangeToDelete,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost);
nsresult ComputeRangeToJoinBlockElementsInSameParent(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount, nsRange& aRangeToDelete,
const Element& aEditingHost) const;
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult>
HandleDeleteLineBreak(HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPoint& aCaretPoint,
const Element& aEditingHost);
enum class ComputeRangeFor : bool { GetTargetRanges, ToDeleteTheRange };
nsresult ComputeRangeToDeleteLineBreak(
const HTMLEditor& aHTMLEditor, nsRange& aRangeToDelete,
const Element& aEditingHost, ComputeRangeFor aComputeRangeFor) const;
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult>
DeleteContentInRange(HTMLEditor& aHTMLEditor,
const LimitersAndCaretData& aLimitersAndCaretData,
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
nsRange& aRangeToDelete, const Element& aEditingHost);
nsresult ComputeRangeToDeleteContentInRange(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount, nsRange& aRange,
const Element& aEditingHost) const;
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditActionResult, nsresult>
HandleDeleteNonCollapsedRange(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers, nsRange& aRangeToDelete,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost);
nsresult ComputeRangeToDeleteNonCollapsedRange(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount, nsRange& aRangeToDelete,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost) const;
/**
* JoinNodesDeepWithTransaction() joins aLeftNode and aRightNode "deeply".
* First, they are joined simply, then, new right node is assumed as the
* child at length of the left node before joined and new left node is
* assumed as its previous sibling. Then, they will be joined again.
* And then, these steps are repeated.
*
* @param aLeftContent The node which will be removed form the tree.
* @param aRightContent The node which will be inserted the contents of
* aRightContent.
* @return The point of the first child of the last right
* node. The result is always set if this succeeded.
*/
MOZ_CAN_RUN_SCRIPT Result<EditorDOMPoint, nsresult>
JoinNodesDeepWithTransaction(HTMLEditor& aHTMLEditor,
nsIContent& aLeftContent,
nsIContent& aRightContent);
enum class PutCaretTo : bool { StartOfRange, EndOfRange };
/**
* DeleteNodesEntirelyInRangeButKeepTableStructure() removes each node in
* aArrayOfContent. However, if some nodes are part of a table, removes all
* children of them instead. I.e., this does not make damage to table
* structure at the range, but may remove table entirely if it's in the
* range.
*/
MOZ_CAN_RUN_SCRIPT Result<DeleteRangeResult, nsresult>
DeleteNodesEntirelyInRangeButKeepTableStructure(
HTMLEditor& aHTMLEditor,
const nsTArray<OwningNonNull<nsIContent>>& aArrayOfContent,
PutCaretTo aPutCaretTo);
bool NeedsToJoinNodesAfterDeleteNodesEntirelyInRangeButKeepTableStructure(
const HTMLEditor& aHTMLEditor,
const nsTArray<OwningNonNull<nsIContent>>& aArrayOfContents,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed)
const;
Result<bool, nsresult>
ComputeRangeToDeleteNodesEntirelyInRangeButKeepTableStructure(
const HTMLEditor& aHTMLEditor, nsRange& aRange,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed)
const;
/**
* DeleteContentButKeepTableStructure() removes aContent if it's an element
* which is part of a table structure. If it's a part of table structure,
* removes its all children recursively. I.e., this may delete all of a
* table, but won't break table structure partially.
*
* @param aContent The content which or whose all children should
* be removed.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<DeleteRangeResult, nsresult>
DeleteContentButKeepTableStructure(HTMLEditor& aHTMLEditor,
nsIContent& aContent);
/**
* DeleteTextAtStartAndEndOfRange() removes text if start and/or end of
* aRange is in a text node.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<DeleteRangeResult, nsresult>
DeleteTextAtStartAndEndOfRange(HTMLEditor& aHTMLEditor, nsRange& aRange,
PutCaretTo aPutCaretTo);
/**
* Return a block element which is an inclusive ancestor of the container of
* aPoint if aPoint is start of ancestor blocks. For example, if `<div
* id=div1>abc<div id=div2><div id=div3>[]def</div></div></div>`, return
* #div2.
*/
template <typename EditorDOMPointType>
static Result<Element*, nsresult>
GetMostDistantBlockAncestorIfPointIsStartAtBlock(
const EditorDOMPointType& aPoint, const Element& aEditingHost,
const Element* aAncestorLimiter = nullptr);
/**
* Extend aRangeToDelete to contain new empty inline ancestors and contain
* an invisible <br> element before right child block which causes an empty
* line but the range starts after it.
*/
void ExtendRangeToDeleteNonCollapsedRange(
const HTMLEditor& aHTMLEditor, nsRange& aRangeToDelete,
const Element& aEditingHost, ComputeRangeFor aComputeRangeFor) const;
class MOZ_STACK_CLASS AutoInclusiveAncestorBlockElementsJoiner final {
public:
AutoInclusiveAncestorBlockElementsJoiner() = delete;
AutoInclusiveAncestorBlockElementsJoiner(
nsIContent& aInclusiveDescendantOfLeftBlockElement,
nsIContent& aInclusiveDescendantOfRightBlockElement)
: mInclusiveDescendantOfLeftBlockElement(
aInclusiveDescendantOfLeftBlockElement),
mInclusiveDescendantOfRightBlockElement(
aInclusiveDescendantOfRightBlockElement),
mCanJoinBlocks(false),
mFallbackToDeleteLeafContent(false) {}
bool IsSet() const { return mLeftBlockElement && mRightBlockElement; }
bool IsSameBlockElement() const {
return mLeftBlockElement && mLeftBlockElement == mRightBlockElement;
}
/**
* Prepare for joining inclusive ancestor block elements. When this
* returns false, the deletion should be canceled.
*/
Result<bool, nsresult> Prepare(const HTMLEditor& aHTMLEditor,
const Element& aEditingHost);
/**
* When this returns true, this can join the blocks with `Run()`.
*/
bool CanJoinBlocks() const { return mCanJoinBlocks; }
/**
* When this returns true, `Run()` must return "ignored" so that
* caller can skip calling `Run()`. This is available only when
* `CanJoinBlocks()` returns `true`.
* TODO: This should be merged into `CanJoinBlocks()` in the future.
*/
bool ShouldDeleteLeafContentInstead() const {
MOZ_ASSERT(CanJoinBlocks());
return mFallbackToDeleteLeafContent;
}
/**
* ComputeRangesToDelete() extends aRangeToDelete includes the element
* boundaries between joining blocks. If they won't be joined, this
* collapses the range to aCaretPoint.
*/
nsresult ComputeRangeToDelete(const HTMLEditor& aHTMLEditor,
const EditorDOMPoint& aCaretPoint,
nsRange& aRangeToDelete) const;
/**
* Join inclusive ancestor block elements which are found by preceding
* Prepare() call.
* The right element is always joined to the left element.
* If the elements are the same type and not nested within each other,
* JoinEditableNodesWithTransaction() is called (example, joining two
* list items together into one).
* If the elements are not the same type, or one is a descendant of the
* other, we instead destroy the right block placing its children into
* left block.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<DeleteRangeResult, nsresult> Run(
HTMLEditor& aHTMLEditor, const Element& aEditingHost);
private:
/**
* This method returns true when
* `MergeFirstLineOfRightBlockElementIntoDescendantLeftBlockElement()`,
* `MergeFirstLineOfRightBlockElementIntoAncestorLeftBlockElement()` and
* `MergeFirstLineOfRightBlockElementIntoLeftBlockElement()` handle it
* with the `if` block of the main lambda of them.
*/
bool CanMergeLeftAndRightBlockElements() const {
if (!IsSet()) {
return false;
}
// `MergeFirstLineOfRightBlockElementIntoDescendantLeftBlockElement()`
if (mPointContainingTheOtherBlockElement.GetContainer() ==
mRightBlockElement) {
return mNewListElementTagNameOfRightListElement.isSome();
}
// `MergeFirstLineOfRightBlockElementIntoAncestorLeftBlockElement()`
if (mPointContainingTheOtherBlockElement.GetContainer() ==
mLeftBlockElement) {
return mNewListElementTagNameOfRightListElement.isSome() &&
mRightBlockElement->GetChildCount();
}
MOZ_ASSERT(!mPointContainingTheOtherBlockElement.IsSet());
// `MergeFirstLineOfRightBlockElementIntoLeftBlockElement()`
return mNewListElementTagNameOfRightListElement.isSome() ||
(mLeftBlockElement->NodeInfo()->NameAtom() ==
mRightBlockElement->NodeInfo()->NameAtom() &&
EditorUtils::GetComputedWhiteSpaceStyles(*mLeftBlockElement) ==
EditorUtils::GetComputedWhiteSpaceStyles(
*mRightBlockElement));
}
OwningNonNull<nsIContent> mInclusiveDescendantOfLeftBlockElement;
OwningNonNull<nsIContent> mInclusiveDescendantOfRightBlockElement;
RefPtr<Element> mLeftBlockElement;
RefPtr<Element> mRightBlockElement;
Maybe<nsAtom*> mNewListElementTagNameOfRightListElement;
EditorDOMPoint mPointContainingTheOtherBlockElement;
RefPtr<dom::HTMLBRElement> mPrecedingInvisibleBRElement;
bool mCanJoinBlocks;
bool mFallbackToDeleteLeafContent;
}; // HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
// AutoInclusiveAncestorBlockElementsJoiner
enum class Mode {
NotInitialized,
JoinCurrentBlock,
JoinOtherBlock,
JoinBlocksInSameParent,
DeleteBRElement,
// The instance will handle only the <br> element immediately before a
// block.
DeletePrecedingBRElementOfBlock,
// The instance will handle only the preceding preformatted line break
// before a block.
DeletePrecedingPreformattedLineBreak,
DeleteContentInRange,
DeleteNonCollapsedRange,
// The instance will handle preceding lines of the right block and content
// in the range in the right block.
DeletePrecedingLinesAndContentInRange,
};
AutoDeleteRangesHandler* mDeleteRangesHandler;
const AutoDeleteRangesHandler& mDeleteRangesHandlerConst;
nsCOMPtr<nsIContent> mLeftContent;
nsCOMPtr<nsIContent> mRightContent;
nsCOMPtr<nsIContent> mLeafContentInOtherBlock;
// mSkippedInvisibleContents stores all content nodes which are skipped at
// scanning mLeftContent and mRightContent. The content nodes should be
// removed at deletion.
AutoTArray<OwningNonNull<nsIContent>, 8> mSkippedInvisibleContents;
RefPtr<dom::HTMLBRElement> mBRElement;
EditorDOMPointInText mPreformattedLineBreak;
Mode mMode = Mode::NotInitialized;
}; // HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner
class MOZ_STACK_CLASS AutoEmptyBlockAncestorDeleter final {
public:
/**
* ScanEmptyBlockInclusiveAncestor() scans an inclusive ancestor element
* which is empty and a block element. Then, stores the result and
* returns the found empty block element.
*
* @param aHTMLEditor The HTMLEditor.
* @param aStartContent Start content to look for empty ancestors.
*/
[[nodiscard]] Element* ScanEmptyBlockInclusiveAncestor(
const HTMLEditor& aHTMLEditor, nsIContent& aStartContent);
/**
* ComputeTargetRanges() computes "target ranges" for deleting
* `mEmptyInclusiveAncestorBlockElement`.
*/
nsresult ComputeTargetRanges(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount, const Element& aEditingHost,
AutoClonedSelectionRangeArray& aRangesToDelete) const;
/**
* Deletes found empty block element by `ScanEmptyBlockInclusiveAncestor()`.
* If found one is a list item element, calls
* `MaybeInsertBRElementBeforeEmptyListItemElement()` before deleting
* the list item element.
* If found empty ancestor is not a list item element,
* `GetNewCaretPosition()` will be called to determine new caret position.
* Finally, removes the empty block ancestor.
*
* @param aHTMLEditor The HTMLEditor.
* @param aDirectionAndAmount If found empty ancestor block is a list item
* element, this is ignored. Otherwise:
* - If eNext, eNextWord or eToEndOfLine,
* collapse Selection to after found empty
* ancestor.
* - If ePrevious, ePreviousWord or
* eToBeginningOfLine, collapse Selection to
* end of previous editable node.
* - Otherwise, eNone is allowed but does
* nothing.
* @param aEditingHost The editing host.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<DeleteRangeResult, nsresult> Run(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
const Element& aEditingHost);
private:
/**
* MaybeReplaceSubListWithNewListItem() replaces
* mEmptyInclusiveAncestorBlockElement with new list item element
* (containing <br>) if:
* - mEmptyInclusiveAncestorBlockElement is a list element
* - The parent of mEmptyInclusiveAncestorBlockElement is a list element
* - The parent becomes empty after deletion
* If this does not perform the replacement, returns "ignored".
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<DeleteRangeResult, nsresult>
MaybeReplaceSubListWithNewListItem(HTMLEditor& aHTMLEditor);
/**
* MaybeInsertBRElementBeforeEmptyListItemElement() inserts a `<br>` element
* if `mEmptyInclusiveAncestorBlockElement` is a list item element which
* is first editable element in its parent, and its grand parent is not a
* list element, inserts a `<br>` element before the empty list item.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CreateLineBreakResult, nsresult>
MaybeInsertBRElementBeforeEmptyListItemElement(HTMLEditor& aHTMLEditor);
/**
* GetNewCaretPosition() returns new caret position after deleting
* `mEmptyInclusiveAncestorBlockElement`.
*/
[[nodiscard]] Result<CaretPoint, nsresult> GetNewCaretPosition(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount) const;
RefPtr<Element> mEmptyInclusiveAncestorBlockElement;
}; // HTMLEditor::AutoDeleteRangesHandler::AutoEmptyBlockAncestorDeleter
const AutoDeleteRangesHandler* const mParent;
nsIEditor::EDirection mOriginalDirectionAndAmount;
nsIEditor::EStripWrappers mOriginalStripWrappers;
}; // HTMLEditor::AutoDeleteRangesHandler
nsresult HTMLEditor::ComputeTargetRanges(
nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete) const {
MOZ_ASSERT(IsEditActionDataAvailable());
Element* editingHost = ComputeEditingHost();
if (!editingHost) {
aRangesToDelete.RemoveAllRanges();
return NS_ERROR_EDITOR_NO_EDITABLE_RANGE;
}
// First check for table selection mode. If so, hand off to table editor.
SelectedTableCellScanner scanner(aRangesToDelete);
if (scanner.IsInTableCellSelectionMode()) {
// If it's in table cell selection mode, we'll delete all childen in
// the all selected table cell elements,
if (scanner.ElementsRef().Length() == aRangesToDelete.Ranges().Length()) {
return NS_OK;
}
// but will ignore all ranges which does not select a table cell.
size_t removedRanges = 0;
for (size_t i = 1; i < scanner.ElementsRef().Length(); i++) {
if (HTMLEditUtils::GetTableCellElementIfOnlyOneSelected(
aRangesToDelete.Ranges()[i - removedRanges]) !=
scanner.ElementsRef()[i]) {
// XXX Need to manage anchor-focus range too!
aRangesToDelete.Ranges().RemoveElementAt(i - removedRanges);
removedRanges++;
}
}
return NS_OK;
}
aRangesToDelete.EnsureOnlyEditableRanges(*editingHost);
if (aRangesToDelete.Ranges().IsEmpty()) {
NS_WARNING(
"There is no range which we can delete entire of or around the caret");
return NS_ERROR_EDITOR_NO_EDITABLE_RANGE;
}
AutoDeleteRangesHandler deleteHandler;
// Should we delete target ranges which cannot delete actually?
nsresult rv = deleteHandler.ComputeRangesToDelete(
*this, aDirectionAndAmount, aRangesToDelete, *editingHost);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::ComputeRangesToDelete() failed");
return rv;
}
Result<EditActionResult, nsresult> HTMLEditor::HandleDeleteSelection(
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(aStripWrappers == nsIEditor::eStrip ||
aStripWrappers == nsIEditor::eNoStrip);
if (MOZ_UNLIKELY(!SelectionRef().RangeCount())) {
return Err(NS_ERROR_EDITOR_NO_EDITABLE_RANGE);
}
const RefPtr<Element> editingHost = ComputeEditingHost();
if (MOZ_UNLIKELY(!editingHost)) {
return Err(NS_ERROR_EDITOR_NO_EDITABLE_RANGE);
}
// Remember that we did a selection deletion. Used by
// CreateStyleForInsertText()
TopLevelEditSubActionDataRef().mDidDeleteSelection = true;
if (MOZ_UNLIKELY(IsEmpty())) {
return EditActionResult::CanceledResult();
}
// First check for table selection mode. If so, hand off to table editor.
if (HTMLEditUtils::IsInTableCellSelectionMode(SelectionRef())) {
nsresult rv = DeleteTableCellContentsWithTransaction();
if (NS_WARN_IF(Destroyed())) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::DeleteTableCellContentsWithTransaction() failed");
return Err(rv);
}
return EditActionResult::HandledResult();
}
AutoClonedSelectionRangeArray rangesToDelete(SelectionRef());
rangesToDelete.EnsureOnlyEditableRanges(*editingHost);
// AutoClonedSelectionRangeArray::ExtendAnchorFocusRangeFor() need to use
// NodeIsInLimiters() to extend the range for deletion. But if focus event
// doesn't receive yet, ancestor hasn't been set yet. So we need to set
// ancestor limiter to editing host, <body> or something else in such case.
if (!rangesToDelete.GetAncestorLimiter()) {
rangesToDelete.SetAncestorLimiter(FindSelectionRoot(*editingHost));
}
if (MOZ_UNLIKELY(rangesToDelete.Ranges().IsEmpty())) {
NS_WARNING(
"There is no range which we can delete entire the ranges or around the "
"caret");
return Err(NS_ERROR_EDITOR_NO_EDITABLE_RANGE);
}
AutoDeleteRangesHandler deleteHandler;
Result<EditActionResult, nsresult> result = deleteHandler.Run(
*this, aDirectionAndAmount, aStripWrappers, rangesToDelete, *editingHost);
if (MOZ_UNLIKELY(result.isErr()) || result.inspect().Canceled()) {
NS_WARNING_ASSERTION(result.isOk(),
"AutoDeleteRangesHandler::Run() failed");
return result;
}
return EditActionResult::HandledResult();
}
Result<EditorDOMPoint, nsresult> HTMLEditor::DeleteLineBreakWithTransaction(
const EditorLineBreak& aLineBreak,
nsIEditor::EStripWrappers aDeleteEmptyInlines,
const Element& aEditingHost) {
MOZ_ASSERT(aLineBreak.IsInComposedDoc());
MOZ_ASSERT_IF(aLineBreak.IsPreformattedLineBreak(),
aLineBreak.CharAtOffsetIsLineBreak());
if (aLineBreak.IsHTMLBRElement() ||
aLineBreak.TextIsOnlyPreformattedLineBreak()) {
const OwningNonNull<nsIContent> nodeToDelete = [&]() -> nsIContent& {
if (aDeleteEmptyInlines == nsIEditor::eNoStrip) {
return aLineBreak.ContentRef();
}
Element* const newEmptyInlineElement =
HTMLEditUtils::GetMostDistantAncestorEditableEmptyInlineElement(
aLineBreak.ContentRef(),
BlockInlineCheck::UseComputedDisplayOutsideStyle, &aEditingHost);
return newEmptyInlineElement ? *newEmptyInlineElement
: aLineBreak.ContentRef();
}();
const nsCOMPtr<nsINode> parentNode = nodeToDelete->GetParentNode();
if (NS_WARN_IF(!parentNode)) {
return Err(NS_ERROR_FAILURE);
}
const nsCOMPtr<nsIContent> nextSibling = nodeToDelete->GetNextSibling();
nsresult rv = DeleteNodeWithTransaction(nodeToDelete);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return Err(rv);
}
if (NS_WARN_IF(nextSibling && nextSibling->GetParentNode() != parentNode) ||
NS_WARN_IF(!parentNode->IsInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
return nextSibling ? EditorDOMPoint(nextSibling)
: EditorDOMPoint::AtEndOf(*parentNode);
}
const OwningNonNull<Text> textNode(aLineBreak.TextRef());
Result<CaretPoint, nsresult> caretPointOrError =
DeleteTextWithTransaction(textNode, aLineBreak.Offset(), 1u);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed");
return caretPointOrError.propagateErr();
}
if (NS_WARN_IF(!caretPointOrError.inspect().HasCaretPointSuggestion())) {
return Err(NS_ERROR_FAILURE);
}
return caretPointOrError.unwrap().UnwrapCaretPoint();
}
Result<CaretPoint, nsresult> HTMLEditor::DeleteRangesWithTransaction(
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
AutoClonedRangeArray& aRangesToDelete) {
const RefPtr<Element> editingHost =
ComputeEditingHost(LimitInBodyElement::No);
if (NS_WARN_IF(!editingHost)) {
return Err(NS_ERROR_UNEXPECTED);
}
aRangesToDelete.ExtendRangeToContainSurroundingInvisibleWhiteSpaces(
aStripWrappers);
if (MOZ_UNLIKELY(aRangesToDelete.IsCollapsed())) {
return CaretPoint(EditorDOMPoint(aRangesToDelete.FocusRef()));
}
Result<CaretPoint, nsresult> result = EditorBase::DeleteRangesWithTransaction(
aDirectionAndAmount, aStripWrappers, aRangesToDelete);
if (MOZ_UNLIKELY(result.isErr())) {
return result;
}
const bool isDeleteSelection =
GetTopLevelEditSubAction() == EditSubAction::eDeleteSelectedContent;
EditorDOMPoint pointToPutCaret = result.unwrap().UnwrapCaretPoint();
MOZ_ASSERT_IF(pointToPutCaret.IsSet(), HTMLEditUtils::IsSimplyEditableNode(
*pointToPutCaret.GetContainer()));
{
AutoTrackDOMPoint trackCaretPoint(RangeUpdaterRef(), &pointToPutCaret);
for (const auto& range : aRangesToDelete.Ranges()) {
// Refer the start boundary of the range because it should be end of the
// preceding content, but the end boundary may be in an ancestor when an
// ancestor element of end boundary has already been deleted.
if (MOZ_UNLIKELY(!range->IsPositioned() ||
!range->GetStartContainer()->IsContent())) {
continue;
}
EditorDOMPoint pointToInsertLineBreak(range->StartRef());
// Don't remove empty inline elements in the plaintext-only mode because
// nobody can restore the style again.
if (aStripWrappers == nsIEditor::eStrip) {
const OwningNonNull<nsIContent> maybeEmptyContent =
*pointToInsertLineBreak.ContainerAs<nsIContent>();
if (MOZ_UNLIKELY(
!HTMLEditUtils::IsRemovableFromParentNode(maybeEmptyContent))) {
continue;
}
// If the `Text` becomes invisible but has collapsible white-spaces, we
// shouldn't delete it because the deletion deletes only before or after
// the white-space to keep the white-space visible.
if (!maybeEmptyContent->IsText() ||
!maybeEmptyContent->AsText()->TextDataLength()) {
Result<CaretPoint, nsresult> caretPointOrError =
DeleteEmptyInclusiveAncestorInlineElements(maybeEmptyContent,
*editingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"HTMLEditor::DeleteEmptyInclusiveAncestorInlineElements() "
"failed");
return caretPointOrError.propagateErr();
}
if (NS_WARN_IF(!range->IsPositioned() ||
!range->GetStartContainer()->IsContent())) {
continue;
}
MOZ_ASSERT_IF(
caretPointOrError.inspect().HasCaretPointSuggestion(),
HTMLEditUtils::IsSimplyEditableNode(
*caretPointOrError.inspect().CaretPointRef().GetContainer()));
caretPointOrError.unwrap().MoveCaretPointTo(
pointToInsertLineBreak, {SuggestCaret::OnlyIfHasSuggestion});
if (NS_WARN_IF(
!pointToInsertLineBreak.IsSetAndValidInComposedDoc())) {
continue;
}
}
}
if ((IsMailEditor() || IsPlaintextMailComposer()) &&
MOZ_LIKELY(pointToInsertLineBreak.IsInContentNode())) {
AutoTrackDOMPoint trackPointToInsertLineBreak(RangeUpdaterRef(),
&pointToInsertLineBreak);
nsresult rv = DeleteMostAncestorMailCiteElementIfEmpty(
MOZ_KnownLive(*pointToInsertLineBreak.ContainerAs<nsIContent>()));
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::DeleteMostAncestorMailCiteElementIfEmpty() failed");
return Err(rv);
}
trackPointToInsertLineBreak.FlushAndStopTracking();
if (NS_WARN_IF(!pointToInsertLineBreak.IsSetAndValidInComposedDoc())) {
continue;
}
MOZ_ASSERT(HTMLEditUtils::IsSimplyEditableNode(
*pointToInsertLineBreak.GetContainer()));
}
if (isDeleteSelection) {
{
AutoTrackDOMPoint trackPointToInsertLineBreak(
RangeUpdaterRef(), &pointToInsertLineBreak);
nsresult rv =
EnsureNoFollowingUnnecessaryLineBreak(pointToInsertLineBreak);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::EnsureNoFollowingUnnecessaryLineBreak() failed");
return Err(rv);
}
trackPointToInsertLineBreak.FlushAndStopTracking();
if (NS_WARN_IF(!pointToInsertLineBreak
.IsInContentNodeAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
Result<CreateLineBreakResult, nsresult> insertPaddingBRElementOrError =
InsertPaddingBRElementIfNeeded(
pointToInsertLineBreak,
editingHost->IsContentEditablePlainTextOnly()
? nsIEditor::eNoStrip
: nsIEditor::eStrip,
*editingHost);
if (MOZ_UNLIKELY(insertPaddingBRElementOrError.isErr())) {
NS_WARNING("HTMLEditor::InsertPaddingBRElementIfNeeded() failed");
return insertPaddingBRElementOrError.propagateErr();
}
insertPaddingBRElementOrError.unwrap().IgnoreCaretPointSuggestion();
}
}
}
return CaretPoint(std::move(pointToPutCaret));
}
nsresult HTMLEditor::AutoDeleteRangesHandler::ComputeRangesToDelete(
const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
mOriginalDirectionAndAmount = aDirectionAndAmount;
mOriginalStripWrappers = nsIEditor::eNoStrip;
if (aHTMLEditor.mPaddingBRElementForEmptyEditor) {
nsresult rv = aRangesToDelete.Collapse(
EditorRawDOMPoint(aHTMLEditor.mPaddingBRElementForEmptyEditor));
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoClonedRangeArray::Collapse() failed");
return rv;
}
SelectionWasCollapsed selectionWasCollapsed = aRangesToDelete.IsCollapsed()
? SelectionWasCollapsed::Yes
: SelectionWasCollapsed::No;
if (selectionWasCollapsed == SelectionWasCollapsed::Yes) {
const auto startPoint =
aRangesToDelete.GetFirstRangeStartPoint<EditorDOMPoint>();
if (NS_WARN_IF(!startPoint.IsSet())) {
return NS_ERROR_FAILURE;
}
if (startPoint.IsInContentNode()) {
AutoEmptyBlockAncestorDeleter deleter;
if (deleter.ScanEmptyBlockInclusiveAncestor(
aHTMLEditor, *startPoint.ContainerAs<nsIContent>())) {
nsresult rv = deleter.ComputeTargetRanges(
aHTMLEditor, aDirectionAndAmount, aEditingHost, aRangesToDelete);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoEmptyBlockAncestorDeleter::ComputeTargetRanges() failed");
return rv;
}
}
// We shouldn't update caret bidi level right now, but we need to check
// whether the deletion will be canceled or not.
AutoCaretBidiLevelManager bidiLevelManager(aHTMLEditor, aDirectionAndAmount,
startPoint);
if (bidiLevelManager.Failed()) {
NS_WARNING(
"EditorBase::AutoCaretBidiLevelManager failed to initialize itself");
return NS_ERROR_FAILURE;
}
if (bidiLevelManager.Canceled()) {
return NS_SUCCESS_DOM_NO_OPERATION;
}
Result<nsIEditor::EDirection, nsresult> extendResult =
aRangesToDelete.ExtendAnchorFocusRangeFor(aHTMLEditor,
aDirectionAndAmount);
if (extendResult.isErr()) {
NS_WARNING(
"AutoClonedSelectionRangeArray::ExtendAnchorFocusRangeFor() failed");
return extendResult.unwrapErr();
}
// For compatibility with other browsers, we should set target ranges
// to start from and/or end after an atomic content rather than start
// from preceding text node end nor end at following text node start.
Result<bool, nsresult> shrunkenResult =
aRangesToDelete.ShrinkRangesIfStartFromOrEndAfterAtomicContent(
aHTMLEditor, aDirectionAndAmount,
AutoClonedRangeArray::IfSelectingOnlyOneAtomicContent::Collapse);
if (shrunkenResult.isErr()) {
NS_WARNING(
"AutoClonedRangeArray::"
"ShrinkRangesIfStartFromOrEndAfterAtomicContent() "
"failed");
return shrunkenResult.unwrapErr();
}
if (!shrunkenResult.inspect() || !aRangesToDelete.IsCollapsed()) {
aDirectionAndAmount = extendResult.unwrap();
}
if (aDirectionAndAmount == nsIEditor::eNone) {
MOZ_ASSERT(aRangesToDelete.Ranges().Length() == 1);
if (!CanFallbackToDeleteRangesWithTransaction(aRangesToDelete)) {
// XXX In this case, do we need to modify the range again?
return NS_SUCCESS_DOM_NO_OPERATION;
}
nsresult rv = FallbackToComputeRangesToDeleteRangesWithTransaction(
aHTMLEditor, aRangesToDelete, aEditingHost);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::"
"FallbackToComputeRangesToDeleteRangesWithTransaction() failed");
return rv;
}
if (aRangesToDelete.IsCollapsed()) {
const auto caretPoint =
aRangesToDelete.GetFirstRangeStartPoint<EditorDOMPoint>();
if (MOZ_UNLIKELY(NS_WARN_IF(!caretPoint.IsInContentNode()))) {
return NS_ERROR_FAILURE;
}
if (!EditorUtils::IsEditableContent(*caretPoint.ContainerAs<nsIContent>(),
EditorType::HTML)) {
return NS_SUCCESS_DOM_NO_OPERATION;
}
const WSRunScanner wsRunScannerAtCaret(
WSRunScanner::Scan::EditableNodes, caretPoint,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
const WSScanResult scanFromCaretPointResult =
aDirectionAndAmount == nsIEditor::eNext
? wsRunScannerAtCaret
.ScanInclusiveNextVisibleNodeOrBlockBoundaryFrom(caretPoint)
: wsRunScannerAtCaret.ScanPreviousVisibleNodeOrBlockBoundaryFrom(
caretPoint);
if (scanFromCaretPointResult.Failed()) {
NS_WARNING(
"WSRunScanner::Scan(Next|Previous)VisibleNodeOrBlockBoundaryFrom() "
"failed");
return NS_ERROR_FAILURE;
}
MOZ_ASSERT(scanFromCaretPointResult.GetContent());
if (scanFromCaretPointResult.ReachedBRElement()) {
if (scanFromCaretPointResult.BRElementPtr() == &aEditingHost) {
return NS_OK;
}
if (!scanFromCaretPointResult.IsContentEditable()) {
return NS_SUCCESS_DOM_NO_OPERATION;
}
if (scanFromCaretPointResult.ReachedInvisibleBRElement()) {
EditorDOMPoint newCaretPosition =
aDirectionAndAmount == nsIEditor::eNext
? scanFromCaretPointResult
.PointAfterReachedContent<EditorDOMPoint>()
: scanFromCaretPointResult
.PointAtReachedContent<EditorDOMPoint>();
if (NS_WARN_IF(!newCaretPosition.IsSet())) {
return NS_ERROR_FAILURE;
}
AutoHideSelectionChanges blockSelectionListeners(
aHTMLEditor.SelectionRef());
nsresult rv = aHTMLEditor.CollapseSelectionTo(newCaretPosition);
if (MOZ_UNLIKELY(NS_FAILED(rv))) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed");
return NS_ERROR_FAILURE;
}
if (NS_WARN_IF(!aHTMLEditor.SelectionRef().RangeCount())) {
return NS_ERROR_UNEXPECTED;
}
aRangesToDelete.Initialize(aHTMLEditor.SelectionRef());
AutoDeleteRangesHandler anotherHandler(this);
rv = anotherHandler.ComputeRangesToDelete(
aHTMLEditor, aDirectionAndAmount, aRangesToDelete, aEditingHost);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"Recursive AutoDeleteRangesHandler::ComputeRangesToDelete() "
"failed");
rv = aHTMLEditor.CollapseSelectionTo(caretPoint);
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the "
"editor");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed to "
"restore original selection, but ignored");
MOZ_ASSERT(aRangesToDelete.Ranges().Length() == 1);
// If the range is collapsed, there is no content which should
// be removed together. In this case, only the invisible `<br>`
// element should be selected.
if (aRangesToDelete.IsCollapsed()) {
nsresult rv = aRangesToDelete.SelectNode(
*scanFromCaretPointResult.BRElementPtr());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoClonedRangeArray::SelectNode() failed");
return rv;
}
// Otherwise, extend the range to contain the invisible `<br>`
// element.
if (scanFromCaretPointResult
.PointAtReachedContent<EditorRawDOMPoint>()
.IsBefore(
aRangesToDelete
.GetFirstRangeStartPoint<EditorRawDOMPoint>())) {
nsresult rv = aRangesToDelete.FirstRangeRef()->SetStartAndEnd(
EditorRawDOMPoint(scanFromCaretPointResult.BRElementPtr())
.ToRawRangeBoundary(),
aRangesToDelete.FirstRangeRef()->EndRef());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsRange::SetStartAndEnd() failed");
return rv;
}
if (aRangesToDelete.GetFirstRangeEndPoint<EditorRawDOMPoint>()
.IsBefore(
scanFromCaretPointResult
.PointAfterReachedContent<EditorRawDOMPoint>())) {
nsresult rv = aRangesToDelete.FirstRangeRef()->SetStartAndEnd(
aRangesToDelete.FirstRangeRef()->StartRef(),
scanFromCaretPointResult
.PointAfterReachedContent<EditorRawDOMPoint>()
.ToRawRangeBoundary());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsRange::SetStartAndEnd() failed");
return rv;
}
NS_WARNING("Was the invisible `<br>` element selected?");
return NS_OK;
}
}
nsresult rv = ComputeRangesToDeleteAroundCollapsedRanges(
aHTMLEditor, aDirectionAndAmount, aRangesToDelete,
wsRunScannerAtCaret, scanFromCaretPointResult, aEditingHost);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::ComputeRangesToDeleteAroundCollapsedRanges("
") failed");
return rv;
}
}
nsresult rv = ComputeRangesToDeleteNonCollapsedRanges(
aHTMLEditor, aDirectionAndAmount, aRangesToDelete, selectionWasCollapsed,
aEditingHost);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::"
"ComputeRangesToDeleteNonCollapsedRanges() failed");
return rv;
}
Result<EditActionResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::Run(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
AutoClonedSelectionRangeArray& aRangesToDelete,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(aStripWrappers == nsIEditor::eStrip ||
aStripWrappers == nsIEditor::eNoStrip);
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
mOriginalDirectionAndAmount = aDirectionAndAmount;
mOriginalStripWrappers = aStripWrappers;
if (MOZ_UNLIKELY(aHTMLEditor.IsEmpty())) {
return EditActionResult::CanceledResult();
}
// selectionWasCollapsed is used later to determine whether we should join
// blocks in HandleDeleteNonCollapsedRanges(). We don't really care about
// collapsed because it will be modified by
// AutoClonedSelectionRangeArray::ExtendAnchorFocusRangeFor() later.
// AutoBlockElementsJoiner::AutoInclusiveAncestorBlockElementsJoiner should
// happen if the original selection is collapsed and the cursor is at the end
// of a block element, in which case
// AutoClonedSelectionRangeArray::ExtendAnchorFocusRangeFor() would always
// make the selection not collapsed.
SelectionWasCollapsed selectionWasCollapsed = aRangesToDelete.IsCollapsed()
? SelectionWasCollapsed::Yes
: SelectionWasCollapsed::No;
if (selectionWasCollapsed == SelectionWasCollapsed::Yes) {
const auto startPoint =
aRangesToDelete.GetFirstRangeStartPoint<EditorDOMPoint>();
if (NS_WARN_IF(!startPoint.IsSet())) {
return Err(NS_ERROR_FAILURE);
}
// If we are inside an empty block, delete it.
if (startPoint.IsInContentNode()) {
#ifdef DEBUG
nsMutationGuard debugMutation;
#endif // #ifdef DEBUG
AutoEmptyBlockAncestorDeleter deleter;
if (deleter.ScanEmptyBlockInclusiveAncestor(
aHTMLEditor, *startPoint.ContainerAs<nsIContent>())) {
Result<DeleteRangeResult, nsresult> deleteResultOrError =
deleter.Run(aHTMLEditor, aDirectionAndAmount, aEditingHost);
if (MOZ_UNLIKELY(deleteResultOrError.isErr())) {
NS_WARNING("AutoEmptyBlockAncestorDeleter::Run() failed");
return deleteResultOrError.propagateErr();
}
DeleteRangeResult deleteResult = deleteResultOrError.unwrap();
if (deleteResult.Handled()) {
nsresult rv = deleteResult.SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPoint() failed");
return Err(rv);
}
return EditActionResult::HandledResult();
}
}
MOZ_ASSERT(!debugMutation.Mutated(0),
"AutoEmptyBlockAncestorDeleter shouldn't modify the DOM tree "
"if it returns not handled nor error");
}
// Test for distance between caret and text that will be deleted.
AutoCaretBidiLevelManager bidiLevelManager(aHTMLEditor, aDirectionAndAmount,
startPoint);
if (MOZ_UNLIKELY(bidiLevelManager.Failed())) {
NS_WARNING(
"EditorBase::AutoCaretBidiLevelManager failed to initialize itself");
return Err(NS_ERROR_FAILURE);
}
bidiLevelManager.MaybeUpdateCaretBidiLevel(aHTMLEditor);
if (bidiLevelManager.Canceled()) {
return EditActionResult::CanceledResult();
}
// Calling `ExtendAnchorFocusRangeFor()` and
// `ShrinkRangesIfStartFromOrEndAfterAtomicContent()` may move caret to
// the container of deleting atomic content. However, it may be different
// from the original caret's container. The original caret container may
// be important to put caret after deletion so that let's cache the
// original position.
Maybe<EditorDOMPoint> caretPoint;
if (aRangesToDelete.IsCollapsed() && !aRangesToDelete.Ranges().IsEmpty()) {
caretPoint =
Some(aRangesToDelete.GetFirstRangeStartPoint<EditorDOMPoint>());
if (NS_WARN_IF(!caretPoint.ref().IsInContentNode())) {
return Err(NS_ERROR_FAILURE);
}
}
Result<nsIEditor::EDirection, nsresult> extendResult =
aRangesToDelete.ExtendAnchorFocusRangeFor(aHTMLEditor,
aDirectionAndAmount);
if (MOZ_UNLIKELY(extendResult.isErr())) {
NS_WARNING(
"AutoClonedSelectionRangeArray::ExtendAnchorFocusRangeFor() failed");
return extendResult.propagateErr();
}
if (caretPoint.isSome() &&
MOZ_UNLIKELY(!caretPoint.ref().IsSetAndValid())) {
NS_WARNING("The caret position became invalid");
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
// If there is only one range and it selects an atomic content, we should
// delete it with collapsed range path for making consistent behavior
// between both cases, the content is selected case and caret is at it or
// after it case.
Result<bool, nsresult> shrunkenResult =
aRangesToDelete.ShrinkRangesIfStartFromOrEndAfterAtomicContent(
aHTMLEditor, aDirectionAndAmount,
AutoClonedRangeArray::IfSelectingOnlyOneAtomicContent::Collapse);
if (MOZ_UNLIKELY(shrunkenResult.isErr())) {
NS_WARNING(
"AutoClonedRangeArray::"
"ShrinkRangesIfStartFromOrEndAfterAtomicContent() "
"failed");
return shrunkenResult.propagateErr();
}
if (!shrunkenResult.inspect() || !aRangesToDelete.IsCollapsed()) {
aDirectionAndAmount = extendResult.unwrap();
}
if (aDirectionAndAmount == nsIEditor::eNone) {
MOZ_ASSERT(aRangesToDelete.Ranges().Length() == 1);
if (!CanFallbackToDeleteRangesWithTransaction(aRangesToDelete)) {
return EditActionResult::IgnoredResult();
}
Result<CaretPoint, nsresult> caretPointOrError =
FallbackToDeleteRangesWithTransaction(aHTMLEditor, aRangesToDelete,
aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"AutoDeleteRangesHandler::FallbackToDeleteRangesWithTransaction() "
"failed");
}
nsresult rv = caretPointOrError.inspect().SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
// Don't return "ignored" to avoid to fall it back to delete ranges
// recursively.
return EditActionResult::HandledResult();
}
if (aRangesToDelete.IsCollapsed()) {
// Use the original caret position for handling the deletion around
// collapsed range because the container may be different from the
// new collapsed position's container.
if (!EditorUtils::IsEditableContent(
*caretPoint.ref().ContainerAs<nsIContent>(), EditorType::HTML)) {
return EditActionResult::CanceledResult();
}
const WSRunScanner wsRunScannerAtCaret(
WSRunScanner::Scan::EditableNodes, caretPoint.ref(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
const WSScanResult scanFromCaretPointResult =
aDirectionAndAmount == nsIEditor::eNext
? wsRunScannerAtCaret
.ScanInclusiveNextVisibleNodeOrBlockBoundaryFrom(
caretPoint.ref())
: wsRunScannerAtCaret.ScanPreviousVisibleNodeOrBlockBoundaryFrom(
caretPoint.ref());
if (MOZ_UNLIKELY(scanFromCaretPointResult.Failed())) {
NS_WARNING(
"WSRunScanner::Scan(Next|Previous)VisibleNodeOrBlockBoundaryFrom() "
"failed");
return Err(NS_ERROR_FAILURE);
}
MOZ_ASSERT(scanFromCaretPointResult.GetContent());
// Short circuit for invisible breaks. delete them and recurse.
if (scanFromCaretPointResult.ReachedBRElement()) {
if (scanFromCaretPointResult.BRElementPtr() == &aEditingHost) {
return EditActionResult::HandledResult();
}
if (!scanFromCaretPointResult.IsContentEditable()) {
return EditActionResult::CanceledResult();
}
if (scanFromCaretPointResult.ReachedInvisibleBRElement()) {
// TODO: We should extend the range to delete again before/after
// the caret point and use `HandleDeleteNonCollapsedRanges()`
// instead after we would create delete range computation
// method at switching to the new white-space normalizer.
Result<CaretPoint, nsresult> caretPointOrError =
WhiteSpaceVisibilityKeeper::
DeleteContentNodeAndJoinTextNodesAroundIt(
aHTMLEditor,
MOZ_KnownLive(*scanFromCaretPointResult.BRElementPtr()),
caretPoint.ref(), aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::"
"DeleteContentNodeAndJoinTextNodesAroundIt() failed");
return caretPointOrError.propagateErr();
}
if (caretPointOrError.inspect().HasCaretPointSuggestion()) {
caretPoint = Some(caretPointOrError.unwrap().UnwrapCaretPoint());
}
if (NS_WARN_IF(!caretPoint->IsSetAndValid())) {
return Err(NS_ERROR_FAILURE);
}
AutoClonedSelectionRangeArray rangesToDelete(
caretPoint.ref(), aRangesToDelete.LimitersAndCaretDataRef());
if (NS_WARN_IF(rangesToDelete.Ranges().IsEmpty())) {
return Err(NS_ERROR_FAILURE);
}
if (aHTMLEditor.MayHaveMutationEventListeners(
NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED |
NS_EVENT_BITS_MUTATION_NODEREMOVED |
NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT)) {
// Let's check whether there is new invisible `<br>` element
// for avoiding infinite recursive calls.
const WSRunScanner wsRunScannerAtCaret(
WSRunScanner::Scan::EditableNodes, caretPoint.ref(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
const WSScanResult scanFromCaretPointResult =
aDirectionAndAmount == nsIEditor::eNext
? wsRunScannerAtCaret
.ScanInclusiveNextVisibleNodeOrBlockBoundaryFrom(
caretPoint.ref())
: wsRunScannerAtCaret
.ScanPreviousVisibleNodeOrBlockBoundaryFrom(
caretPoint.ref());
if (MOZ_UNLIKELY(scanFromCaretPointResult.Failed())) {
NS_WARNING(
"WSRunScanner::Scan(Next|Previous)"
"VisibleNodeOrBlockBoundaryFrom() failed");
return Err(NS_ERROR_FAILURE);
}
if (NS_WARN_IF(
scanFromCaretPointResult.ReachedInvisibleBRElement())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
AutoDeleteRangesHandler anotherHandler(this);
Result<EditActionResult, nsresult> result =
anotherHandler.Run(aHTMLEditor, aDirectionAndAmount,
aStripWrappers, rangesToDelete, aEditingHost);
NS_WARNING_ASSERTION(
result.isOk(), "Recursive AutoDeleteRangesHandler::Run() failed");
return result;
}
}
Result<EditActionResult, nsresult> result =
HandleDeleteAroundCollapsedRanges(
aHTMLEditor, aDirectionAndAmount, aStripWrappers, aRangesToDelete,
wsRunScannerAtCaret, scanFromCaretPointResult, aEditingHost);
NS_WARNING_ASSERTION(result.isOk(),
"AutoDeleteRangesHandler::"
"HandleDeleteAroundCollapsedRanges() failed");
return result;
}
}
Result<EditActionResult, nsresult> result = HandleDeleteNonCollapsedRanges(
aHTMLEditor, aDirectionAndAmount, aStripWrappers, aRangesToDelete,
selectionWasCollapsed, aEditingHost);
NS_WARNING_ASSERTION(
result.isOk(),
"AutoDeleteRangesHandler::HandleDeleteNonCollapsedRanges() failed");
return result;
}
nsresult
HTMLEditor::AutoDeleteRangesHandler::ComputeRangesToDeleteAroundCollapsedRanges(
const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
const WSRunScanner& aWSRunScannerAtCaret,
const WSScanResult& aScanFromCaretPointResult,
const Element& aEditingHost) const {
if (aScanFromCaretPointResult.InCollapsibleWhiteSpaces() ||
aScanFromCaretPointResult.InNonCollapsibleCharacters() ||
aScanFromCaretPointResult.ReachedPreformattedLineBreak()) {
// This means that if aDirectionAndAmount == nsIEditor::eNext, collapse
// selection at the found character. Otherwise, collapse selection after
// the found character.
nsresult rv = aRangesToDelete.Collapse(
aScanFromCaretPointResult.Point_Deprecated<EditorRawDOMPoint>());
if (MOZ_UNLIKELY(NS_FAILED(rv))) {
NS_WARNING("AutoClonedRangeArray::Collapse() failed");
return NS_ERROR_FAILURE;
}
rv = ComputeRangesToDeleteTextAroundCollapsedRanges(aDirectionAndAmount,
aRangesToDelete);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::"
"ComputeRangesToDeleteTextAroundCollapsedRanges() failed");
return rv;
}
if (aScanFromCaretPointResult.ReachedSpecialContent() ||
aScanFromCaretPointResult.ReachedBRElement() ||
aScanFromCaretPointResult.ReachedHRElement() ||
aScanFromCaretPointResult.ReachedNonEditableOtherBlockElement()) {
if (aScanFromCaretPointResult.GetContent() == &aEditingHost) {
return NS_OK;
}
nsIContent* atomicContent = GetAtomicContentToDelete(
aDirectionAndAmount, aWSRunScannerAtCaret, aScanFromCaretPointResult);
if (!HTMLEditUtils::IsRemovableNode(*atomicContent)) {
NS_WARNING(
"AutoDeleteRangesHandler::GetAtomicContentToDelete() cannot find "
"removable atomic content");
return NS_ERROR_FAILURE;
}
nsresult rv =
ComputeRangesToDeleteAtomicContent(*atomicContent, aRangesToDelete);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::ComputeRangesToDeleteAtomicContent() failed");
return rv;
}
if (aScanFromCaretPointResult.ReachedOtherBlockElement()) {
if (NS_WARN_IF(!aScanFromCaretPointResult.ContentIsElement())) {
return NS_ERROR_FAILURE;
}
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
bool handled = false;
for (const OwningNonNull<nsRange>& range : aRangesToDelete.Ranges()) {
MOZ_ASSERT(range->IsPositioned());
AutoBlockElementsJoiner joiner(*this);
if (!joiner.PrepareToDeleteAtOtherBlockBoundary(
aHTMLEditor, aDirectionAndAmount,
*aScanFromCaretPointResult.ElementPtr(),
aWSRunScannerAtCaret.ScanStartRef(), aWSRunScannerAtCaret)) {
continue;
}
handled = true;
nsresult rv = joiner.ComputeRangeToDelete(
aHTMLEditor, aDirectionAndAmount, aWSRunScannerAtCaret.ScanStartRef(),
range, aEditingHost);
if (NS_FAILED(rv)) {
NS_WARNING(
"AutoBlockElementsJoiner::ComputeRangeToDelete() failed (other "
"block boundary)");
return rv;
}
}
return handled ? NS_OK : NS_SUCCESS_DOM_NO_OPERATION;
}
if (aScanFromCaretPointResult.ReachedCurrentBlockBoundary() ||
aScanFromCaretPointResult.ReachedInlineEditingHostBoundary()) {
MOZ_ASSERT(aScanFromCaretPointResult.ContentIsElement());
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
bool handled = false;
for (const OwningNonNull<nsRange>& range : aRangesToDelete.Ranges()) {
AutoBlockElementsJoiner joiner(*this);
if (!joiner.PrepareToDeleteAtCurrentBlockBoundary(
aHTMLEditor, aDirectionAndAmount,
*aScanFromCaretPointResult.ElementPtr(),
aWSRunScannerAtCaret.ScanStartRef(), aEditingHost)) {
continue;
}
handled = true;
nsresult rv = joiner.ComputeRangeToDelete(
aHTMLEditor, aDirectionAndAmount, aWSRunScannerAtCaret.ScanStartRef(),
range, aEditingHost);
if (NS_FAILED(rv)) {
NS_WARNING(
"AutoBlockElementsJoiner::ComputeRangeToDelete() failed (current "
"block boundary)");
return rv;
}
}
return handled ? NS_OK : NS_SUCCESS_DOM_NO_OPERATION;
}
return NS_OK;
}
Result<EditActionResult, nsresult>
HTMLEditor::AutoDeleteRangesHandler::HandleDeleteAroundCollapsedRanges(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
AutoClonedSelectionRangeArray& aRangesToDelete,
const WSRunScanner& aWSRunScannerAtCaret,
const WSScanResult& aScanFromCaretPointResult,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsTopLevelEditSubActionDataAvailable());
MOZ_ASSERT(aRangesToDelete.IsCollapsed());
MOZ_ASSERT(aDirectionAndAmount != nsIEditor::eNone);
MOZ_ASSERT(aWSRunScannerAtCaret.ScanStartRef().IsInContentNode());
MOZ_ASSERT(EditorUtils::IsEditableContent(
*aWSRunScannerAtCaret.ScanStartRef().ContainerAs<nsIContent>(),
EditorType::HTML));
if (StaticPrefs::editor_white_space_normalization_blink_compatible()) {
if (aScanFromCaretPointResult.InCollapsibleWhiteSpaces() ||
aScanFromCaretPointResult.InNonCollapsibleCharacters() ||
aScanFromCaretPointResult.ReachedPreformattedLineBreak()) {
// This means that if aDirectionAndAmount == nsIEditor::eNext, collapse
// selection at the found character. Otherwise, collapse selection after
// the found character.
nsresult rv = aRangesToDelete.Collapse(
aScanFromCaretPointResult.Point_Deprecated<EditorRawDOMPoint>());
if (NS_FAILED(rv)) {
NS_WARNING("AutoClonedRangeArray::Collapse() failed");
return Err(NS_ERROR_FAILURE);
}
Result<CaretPoint, nsresult> caretPointOrError =
HandleDeleteTextAroundCollapsedRanges(
aHTMLEditor, aDirectionAndAmount, aRangesToDelete, aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"AutoDeleteRangesHandler::HandleDeleteTextAroundCollapsedRanges() "
"failed");
return caretPointOrError.propagateErr();
}
rv = caretPointOrError.unwrap().SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPoint() failed, but ignored");
return EditActionResult::HandledResult();
}
}
if (aScanFromCaretPointResult.InCollapsibleWhiteSpaces() ||
aScanFromCaretPointResult.ReachedPreformattedLineBreak()) {
Result<CaretPoint, nsresult> caretPointOrError =
HandleDeleteCollapsedSelectionAtWhiteSpaces(
aHTMLEditor, aDirectionAndAmount,
aWSRunScannerAtCaret.ScanStartRef(), aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"AutoDeleteRangesHandler::"
"HandleDeleteCollapsedSelectionAtWhiteSpaces() failed");
return caretPointOrError.propagateErr();
}
nsresult rv = caretPointOrError.unwrap().SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
return EditActionResult::HandledResult();
}
if (aScanFromCaretPointResult.InNonCollapsibleCharacters()) {
if (NS_WARN_IF(!aScanFromCaretPointResult.ContentIsText())) {
return Err(NS_ERROR_FAILURE);
}
Result<CaretPoint, nsresult> caretPointOrError =
HandleDeleteCollapsedSelectionAtVisibleChar(
aHTMLEditor, aDirectionAndAmount, aRangesToDelete,
// This means that if aDirectionAndAmount == nsIEditor::eNext,
// at the found character. Otherwise, after the found character.
aScanFromCaretPointResult.Point_Deprecated<EditorDOMPoint>(),
aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"AutoDeleteRangesHandler::"
"HandleDeleteCollapsedSelectionAtVisibleChar() failed");
return caretPointOrError.propagateErr();
}
nsresult rv = caretPointOrError.unwrap().SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
return EditActionResult::HandledResult();
}
if (aScanFromCaretPointResult.ReachedSpecialContent() ||
aScanFromCaretPointResult.ReachedBRElement() ||
aScanFromCaretPointResult.ReachedHRElement() ||
aScanFromCaretPointResult.ReachedNonEditableOtherBlockElement()) {
if (aScanFromCaretPointResult.GetContent() == &aEditingHost) {
return EditActionResult::HandledResult();
}
nsCOMPtr<nsIContent> atomicContent = GetAtomicContentToDelete(
aDirectionAndAmount, aWSRunScannerAtCaret, aScanFromCaretPointResult);
if (MOZ_UNLIKELY(!HTMLEditUtils::IsRemovableNode(*atomicContent))) {
NS_WARNING(
"AutoDeleteRangesHandler::GetAtomicContentToDelete() cannot find "
"removable atomic content");
return Err(NS_ERROR_FAILURE);
}
Result<CaretPoint, nsresult> caretPointOrError = HandleDeleteAtomicContent(
aHTMLEditor, *atomicContent, aWSRunScannerAtCaret.ScanStartRef(),
aWSRunScannerAtCaret, aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("AutoDeleteRangesHandler::HandleDeleteAtomicContent() failed");
return caretPointOrError.propagateErr();
}
nsresult rv = caretPointOrError.unwrap().SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
return EditActionResult::HandledResult();
}
if (aScanFromCaretPointResult.ReachedOtherBlockElement()) {
if (NS_WARN_IF(!aScanFromCaretPointResult.ContentIsElement())) {
return Err(NS_ERROR_FAILURE);
}
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
bool allRangesNotHandled = true;
auto ret = EditActionResult::IgnoredResult();
for (const OwningNonNull<nsRange>& range : aRangesToDelete.Ranges()) {
AutoBlockElementsJoiner joiner(*this);
if (!joiner.PrepareToDeleteAtOtherBlockBoundary(
aHTMLEditor, aDirectionAndAmount,
*aScanFromCaretPointResult.ElementPtr(),
aWSRunScannerAtCaret.ScanStartRef(), aWSRunScannerAtCaret)) {
continue;
}
allRangesNotHandled = false;
Result<EditActionResult, nsresult> result =
joiner.Run(aHTMLEditor, aDirectionAndAmount, aStripWrappers,
aWSRunScannerAtCaret.ScanStartRef(), MOZ_KnownLive(range),
aEditingHost);
if (MOZ_UNLIKELY(result.isErr())) {
NS_WARNING(
"AutoBlockElementsJoiner::Run() failed (other block boundary)");
return result;
}
ret |= result.inspect();
}
return allRangesNotHandled ? EditActionResult::CanceledResult()
: std::move(ret);
}
if (aScanFromCaretPointResult.ReachedCurrentBlockBoundary() ||
aScanFromCaretPointResult.ReachedInlineEditingHostBoundary()) {
MOZ_ASSERT(aScanFromCaretPointResult.ContentIsElement());
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
bool allRangesNotHandled = true;
auto ret = EditActionResult::IgnoredResult();
for (const OwningNonNull<nsRange>& range : aRangesToDelete.Ranges()) {
AutoBlockElementsJoiner joiner(*this);
if (!joiner.PrepareToDeleteAtCurrentBlockBoundary(
aHTMLEditor, aDirectionAndAmount,
*aScanFromCaretPointResult.ElementPtr(),
aWSRunScannerAtCaret.ScanStartRef(), aEditingHost)) {
continue;
}
allRangesNotHandled = false;
Result<EditActionResult, nsresult> result =
joiner.Run(aHTMLEditor, aDirectionAndAmount, aStripWrappers,
aWSRunScannerAtCaret.ScanStartRef(), MOZ_KnownLive(range),
aEditingHost);
if (MOZ_UNLIKELY(result.isErr())) {
NS_WARNING(
"AutoBlockElementsJoiner::Run() failed (current block boundary)");
return result;
}
ret |= result.inspect();
}
return allRangesNotHandled ? EditActionResult::CanceledResult()
: std::move(ret);
}
MOZ_ASSERT_UNREACHABLE("New type of reached content hasn't been handled yet");
return EditActionResult::IgnoredResult();
}
nsresult HTMLEditor::AutoDeleteRangesHandler::
ComputeRangesToDeleteTextAroundCollapsedRanges(
nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete) const {
MOZ_ASSERT(aDirectionAndAmount == nsIEditor::eNext ||
aDirectionAndAmount == nsIEditor::ePrevious);
const auto caretPosition =
aRangesToDelete.GetFirstRangeStartPoint<EditorDOMPoint>();
MOZ_ASSERT(caretPosition.IsSetAndValid());
if (MOZ_UNLIKELY(NS_WARN_IF(!caretPosition.IsInContentNode()))) {
return NS_ERROR_FAILURE;
}
EditorDOMRangeInTexts rangeToDelete;
if (aDirectionAndAmount == nsIEditor::eNext) {
Result<EditorDOMRangeInTexts, nsresult> result =
WSRunScanner::GetRangeInTextNodesToForwardDeleteFrom(
WSRunScanner::Scan::EditableNodes, caretPosition);
if (result.isErr()) {
NS_WARNING(
"WSRunScanner::GetRangeInTextNodesToForwardDeleteFrom() failed");
return result.unwrapErr();
}
rangeToDelete = result.unwrap();
if (!rangeToDelete.IsPositioned()) {
return NS_OK; // no range to delete, but consume it.
}
} else {
Result<EditorDOMRangeInTexts, nsresult> result =
WSRunScanner::GetRangeInTextNodesToBackspaceFrom(
WSRunScanner::Scan::EditableNodes, caretPosition);
if (result.isErr()) {
NS_WARNING("WSRunScanner::GetRangeInTextNodesToBackspaceFrom() failed");
return result.unwrapErr();
}
rangeToDelete = result.unwrap();
if (!rangeToDelete.IsPositioned()) {
return NS_OK; // no range to delete, but consume it.
}
}
// FIXME: If we'll delete unnecessary following <br>, we need to include it
// into aRangesToDelete.
nsresult rv = aRangesToDelete.SetStartAndEnd(rangeToDelete.StartRef(),
rangeToDelete.EndRef());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoArrayRanges::SetStartAndEnd() failed");
return rv;
}
Result<CaretPoint, nsresult>
HTMLEditor::AutoDeleteRangesHandler::HandleDeleteTextAroundCollapsedRanges(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
const Element& aEditingHost) {
MOZ_ASSERT(StaticPrefs::editor_white_space_normalization_blink_compatible());
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(aDirectionAndAmount == nsIEditor::eNext ||
aDirectionAndAmount == nsIEditor::ePrevious);
nsresult rv = ComputeRangesToDeleteTextAroundCollapsedRanges(
aDirectionAndAmount, aRangesToDelete);
if (NS_FAILED(rv)) {
return Err(NS_ERROR_FAILURE);
}
if (MOZ_UNLIKELY(aRangesToDelete.IsCollapsed())) {
return CaretPoint(EditorDOMPoint()); // no range to delete
}
// FYI: rangeToDelete does not contain newly empty inline ancestors which
// are removed by DeleteTextAndNormalizeSurroundingWhiteSpaces().
// So, if `getTargetRanges()` needs to include parent empty elements,
// we need to extend the range with
// HTMLEditUtils::GetMostDistantAncestorEditableEmptyInlineElement().
EditorRawDOMRange rangeToDelete(aRangesToDelete.FirstRangeRef());
if (MOZ_UNLIKELY(!rangeToDelete.IsInTextNodes())) {
NS_WARNING("The extended range to delete character was not in text nodes");
return Err(NS_ERROR_FAILURE);
}
// If deleting some characters makes the last line before a block boundary
// empty, we need to put a line break.
const bool becomesEmptyLine = [&]() {
if (!rangeToDelete.StartRef().IsStartOfContainer() ||
!rangeToDelete.EndRef().IsEndOfContainer()) {
return false;
}
const WSScanResult previousThing =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::All, rangeToDelete.StartRef(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (!previousThing.ReachedLineBoundary() ||
previousThing.ReachedBlockBoundary()) {
return false;
}
WSScanResult nextThing =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::All, rangeToDelete.EndRef(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (nextThing.ReachedBRElement() ||
nextThing.ReachedPreformattedLineBreak()) {
nextThing = WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::All,
nextThing.PointAfterReachedContent<EditorRawDOMPoint>(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
}
return nextThing.ReachedBlockBoundary();
}();
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteTextAndNormalizeSurroundingWhiteSpaces(
rangeToDelete.StartRef().AsInText(),
rangeToDelete.EndRef().AsInText(),
!aEditingHost.IsContentEditablePlainTextOnly()
? TreatEmptyTextNodes::RemoveAllEmptyInlineAncestors
: TreatEmptyTextNodes::Remove,
aDirectionAndAmount == nsIEditor::eNext ? DeleteDirection::Forward
: DeleteDirection::Backward,
aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"HTMLEditor::DeleteTextAndNormalizeSurroundingWhiteSpaces() failed");
return caretPointOrError;
}
if (!becomesEmptyLine) {
return caretPointOrError;
}
const EditorDOMPoint pointToPutLineBreak =
caretPointOrError.unwrap().UnwrapCaretPoint();
const Maybe<LineBreakType> lineBreakType =
aHTMLEditor.GetPreferredLineBreakType(
*pointToPutLineBreak.ContainerAs<nsIContent>(), aEditingHost);
if (NS_WARN_IF(lineBreakType.isNothing())) {
return Err(NS_ERROR_FAILURE);
}
Result<CreateLineBreakResult, nsresult> lineBreakOrError =
aHTMLEditor.InsertLineBreak(WithTransaction::Yes, *lineBreakType,
pointToPutLineBreak, nsIEditor::ePrevious);
if (MOZ_UNLIKELY(lineBreakOrError.isErr())) {
NS_WARNING(
"HTMLEditor::InsertLineBreak(WithTransaction::Yes, "
"nsIEditor::ePrevious) failed");
return lineBreakOrError.propagateErr();
}
return CaretPoint(lineBreakOrError.unwrap().UnwrapCaretPoint());
}
Result<CaretPoint, nsresult> HTMLEditor::AutoDeleteRangesHandler::
HandleDeleteCollapsedSelectionAtWhiteSpaces(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPoint& aPointToDelete, const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!StaticPrefs::editor_white_space_normalization_blink_compatible());
EditorDOMPoint pointToPutCaret;
if (aDirectionAndAmount == nsIEditor::eNext) {
Result<CaretPoint, nsresult> caretPointOrError =
WhiteSpaceVisibilityKeeper::DeleteInclusiveNextWhiteSpace(
aHTMLEditor, aPointToDelete, aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::DeleteInclusiveNextWhiteSpace() failed");
return caretPointOrError;
}
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, aHTMLEditor,
{SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
} else {
Result<CaretPoint, nsresult> caretPointOrError =
WhiteSpaceVisibilityKeeper::DeletePreviousWhiteSpace(
aHTMLEditor, aPointToDelete, aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::DeletePreviousWhiteSpace() failed");
return caretPointOrError;
}
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, aHTMLEditor,
{SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
}
if (MOZ_LIKELY(pointToPutCaret.IsInContentNode())) {
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv =
aHTMLEditor.EnsureNoFollowingUnnecessaryLineBreak(pointToPutCaret);
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::EnsureNoFollowingUnnecessaryLineBreak() failed");
return Err(rv);
}
trackPointToPutCaret.FlushAndStopTracking();
if (NS_WARN_IF(!pointToPutCaret.IsSet())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
auto newCaretPosition =
aHTMLEditor.GetFirstSelectionStartPoint<EditorDOMPoint>();
if (MOZ_UNLIKELY(!newCaretPosition.IsSet())) {
NS_WARNING("There was no selection range");
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
const bool isDeleteSelection = aHTMLEditor.GetTopLevelEditSubAction() ==
EditSubAction::eDeleteSelectedContent;
AutoTrackDOMPoint trackCaretPoint(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
if (isDeleteSelection) {
// Don't remove empty inline elements in the plaintext-only mode because
// nobody can restore the style again.
if (MOZ_LIKELY(newCaretPosition.IsInContentNode()) &&
!aEditingHost.IsContentEditablePlainTextOnly() &&
MOZ_LIKELY(HTMLEditUtils::IsRemovableFromParentNode(
*newCaretPosition.ContainerAs<nsIContent>()))) {
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteEmptyInclusiveAncestorInlineElements(
MOZ_KnownLive(*newCaretPosition.ContainerAs<nsIContent>()),
aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"HTMLEditor::DeleteEmptyInclusiveAncestorInlineElements() failed");
return caretPointOrError.propagateErr();
}
caretPointOrError.unwrap().MoveCaretPointTo(
newCaretPosition, {SuggestCaret::OnlyIfHasSuggestion});
if (NS_WARN_IF(!newCaretPosition.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
}
if ((aHTMLEditor.IsMailEditor() || aHTMLEditor.IsPlaintextMailComposer()) &&
MOZ_LIKELY(newCaretPosition.IsInContentNode())) {
AutoTrackDOMPoint trackNewCaretPosition(aHTMLEditor.RangeUpdaterRef(),
&newCaretPosition);
nsresult rv = aHTMLEditor.DeleteMostAncestorMailCiteElementIfEmpty(
MOZ_KnownLive(*newCaretPosition.ContainerAs<nsIContent>()));
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::DeleteMostAncestorMailCiteElementIfEmpty() failed");
return Err(rv);
}
trackNewCaretPosition.FlushAndStopTracking();
if (NS_WARN_IF(!newCaretPosition.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
if (isDeleteSelection) {
Result<CreateLineBreakResult, nsresult> insertPaddingBRElementOrError =
aHTMLEditor.InsertPaddingBRElementIfNeeded(
newCaretPosition,
aEditingHost.IsContentEditablePlainTextOnly() ? nsIEditor::eNoStrip
: nsIEditor::eStrip,
aEditingHost);
if (MOZ_UNLIKELY(insertPaddingBRElementOrError.isErr())) {
NS_WARNING("HTMLEditor::InsertPaddingBRElementIfNeeded() failed");
return insertPaddingBRElementOrError.propagateErr();
}
trackCaretPoint.FlushAndStopTracking();
if (!pointToPutCaret.IsInTextNode()) {
insertPaddingBRElementOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
} else {
insertPaddingBRElementOrError.unwrap().IgnoreCaretPointSuggestion();
}
}
trackCaretPoint.FlushAndStopTracking();
return CaretPoint(std::move(pointToPutCaret));
}
Result<CaretPoint, nsresult> HTMLEditor::AutoDeleteRangesHandler::
HandleDeleteCollapsedSelectionAtVisibleChar(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
const EditorDOMPoint& aPointAtDeletingChar,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsTopLevelEditSubActionDataAvailable());
MOZ_ASSERT(!StaticPrefs::editor_white_space_normalization_blink_compatible());
MOZ_ASSERT(aPointAtDeletingChar.IsSet());
MOZ_ASSERT(aPointAtDeletingChar.IsInTextNode());
OwningNonNull<Text> visibleTextNode =
*aPointAtDeletingChar.ContainerAs<Text>();
EditorDOMPoint startToDelete, endToDelete;
// FIXME: This does not care grapheme cluster of complicate character
// sequence like Emoji.
// TODO: Investigate what happens if a grapheme cluster which should be
// delete once is split to multiple text nodes.
// TODO: We should stop using this path, instead, we should extend the range
// before calling this method.
if (aDirectionAndAmount == nsIEditor::ePrevious) {
if (MOZ_UNLIKELY(aPointAtDeletingChar.IsStartOfContainer())) {
return Err(NS_ERROR_UNEXPECTED);
}
startToDelete = aPointAtDeletingChar.PreviousPoint();
endToDelete = aPointAtDeletingChar;
// Bug 1068979: delete both codepoints if surrogate pair
if (!startToDelete.IsStartOfContainer()) {
const nsTextFragment* text = &visibleTextNode->TextFragment();
if (text->IsLowSurrogateFollowingHighSurrogateAt(
startToDelete.Offset())) {
startToDelete.RewindOffset();
}
}
} else {
if (NS_WARN_IF(aRangesToDelete.Ranges().IsEmpty()) ||
NS_WARN_IF(aRangesToDelete.FirstRangeRef()->GetStartContainer() !=
aPointAtDeletingChar.GetContainer()) ||
NS_WARN_IF(aRangesToDelete.FirstRangeRef()->GetEndContainer() !=
aPointAtDeletingChar.GetContainer())) {
return Err(NS_ERROR_FAILURE);
}
startToDelete = aRangesToDelete.FirstRangeRef()->StartRef();
endToDelete = aRangesToDelete.FirstRangeRef()->EndRef();
}
{
Result<CaretPoint, nsresult> caretPointOrError =
WhiteSpaceVisibilityKeeper::PrepareToDeleteRangeAndTrackPoints(
aHTMLEditor, &startToDelete, &endToDelete, aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::PrepareToDeleteRangeAndTrackPoints() "
"failed");
return caretPointOrError.propagateErr();
}
// Ignore caret position because we'll set caret position below
caretPointOrError.unwrap().IgnoreCaretPointSuggestion();
}
if (aHTMLEditor.MayHaveMutationEventListeners(
NS_EVENT_BITS_MUTATION_NODEREMOVED |
NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT |
NS_EVENT_BITS_MUTATION_ATTRMODIFIED |
NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED) &&
(NS_WARN_IF(!startToDelete.IsSetAndValid()) ||
NS_WARN_IF(!startToDelete.IsInTextNode()) ||
NS_WARN_IF(!endToDelete.IsSetAndValid()) ||
NS_WARN_IF(!endToDelete.IsInTextNode()) ||
NS_WARN_IF(startToDelete.ContainerAs<Text>() != visibleTextNode) ||
NS_WARN_IF(endToDelete.ContainerAs<Text>() != visibleTextNode) ||
NS_WARN_IF(startToDelete.Offset() >= endToDelete.Offset()))) {
NS_WARNING("Mutation event listener changed the DOM tree");
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
EditorDOMPoint pointToPutCaret = startToDelete;
{
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteTextWithTransaction(
visibleTextNode, startToDelete.Offset(),
endToDelete.Offset() - startToDelete.Offset());
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed");
return caretPointOrError.propagateErr();
}
trackPointToPutCaret.FlushAndStopTracking();
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion});
}
// XXX When Backspace key is pressed, Chromium removes following empty
// text nodes when removing the last character of the non-empty text
// node. However, Edge never removes empty text nodes even if
// selection is in the following empty text node(s). For now, we
// should keep our traditional behavior same as Edge for backward
// compatibility.
// XXX When Delete key is pressed, Edge removes all preceding empty
// text nodes when removing the first character of the non-empty
// text node. Chromium removes only selected empty text node and
// following empty text nodes and the first character of the
// non-empty text node. For now, we should keep our traditional
// behavior same as Chromium for backward compatibility.
{
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv =
DeleteNodeIfInvisibleAndEditableTextNode(aHTMLEditor, visibleTextNode);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::DeleteNodeIfInvisibleAndEditableTextNode() "
"failed, but ignored");
}
if (NS_WARN_IF(!pointToPutCaret.IsSet())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
if (MOZ_LIKELY(pointToPutCaret.IsInContentNode())) {
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv =
aHTMLEditor.EnsureNoFollowingUnnecessaryLineBreak(pointToPutCaret);
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::EnsureNoFollowingUnnecessaryLineBreak() failed");
return Err(rv);
}
}
if (NS_WARN_IF(!pointToPutCaret.IsSet())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
// XXX `Selection` may be modified by mutation event listeners so
// that we should use EditorDOMPoint::AtEndOf(visibleTextNode)
// instead. (Perhaps, we don't and/or shouldn't need to do this
// if the text node is preformatted.)
const bool isDeleteSelection = aHTMLEditor.GetTopLevelEditSubAction() ==
EditSubAction::eDeleteSelectedContent;
if (isDeleteSelection) {
// Don't remove empty inline elements in the plaintext-only mode because
// nobody can restore the style again.
if (MOZ_LIKELY(pointToPutCaret.IsInContentNode()) &&
!aEditingHost.IsContentEditablePlainTextOnly() &&
MOZ_LIKELY(HTMLEditUtils::IsRemovableFromParentNode(
*pointToPutCaret.ContainerAs<nsIContent>()))) {
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteEmptyInclusiveAncestorInlineElements(
MOZ_KnownLive(*pointToPutCaret.ContainerAs<nsIContent>()),
aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"HTMLEditor::DeleteEmptyInclusiveAncestorInlineElements() failed");
return caretPointOrError;
}
trackPointToPutCaret.FlushAndStopTracking();
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
if (NS_WARN_IF(!pointToPutCaret.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
}
if ((aHTMLEditor.IsMailEditor() || aHTMLEditor.IsPlaintextMailComposer()) &&
MOZ_LIKELY(pointToPutCaret.IsInContentNode())) {
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv = aHTMLEditor.DeleteMostAncestorMailCiteElementIfEmpty(
MOZ_KnownLive(*pointToPutCaret.ContainerAs<nsIContent>()));
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::DeleteMostAncestorMailCiteElementIfEmpty() failed");
return Err(rv);
}
trackPointToPutCaret.FlushAndStopTracking();
if (NS_WARN_IF(!pointToPutCaret.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
if (isDeleteSelection) {
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
Result<CreateLineBreakResult, nsresult> insertPaddingBRElementOrError =
aHTMLEditor.InsertPaddingBRElementIfNeeded(
pointToPutCaret,
aEditingHost.IsContentEditablePlainTextOnly() ? nsIEditor::eNoStrip
: nsIEditor::eStrip,
aEditingHost);
if (MOZ_UNLIKELY(insertPaddingBRElementOrError.isErr())) {
NS_WARNING("HTMLEditor::InsertPaddingBRElementIfNeeded() failed");
return insertPaddingBRElementOrError.propagateErr();
}
trackPointToPutCaret.FlushAndStopTracking();
if (!pointToPutCaret.IsInTextNode()) {
insertPaddingBRElementOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
} else {
insertPaddingBRElementOrError.unwrap().IgnoreCaretPointSuggestion();
}
}
// Remember that we did a ranged delete for the benefit of
// AfterEditInner().
aHTMLEditor.TopLevelEditSubActionDataRef().mDidDeleteNonCollapsedRange = true;
return CaretPoint(std::move(pointToPutCaret));
}
// static
nsIContent* HTMLEditor::AutoDeleteRangesHandler::GetAtomicContentToDelete(
nsIEditor::EDirection aDirectionAndAmount,
const WSRunScanner& aWSRunScannerAtCaret,
const WSScanResult& aScanFromCaretPointResult) {
MOZ_ASSERT(aScanFromCaretPointResult.GetContent());
if (!aScanFromCaretPointResult.ReachedSpecialContent()) {
return aScanFromCaretPointResult.GetContent();
}
if (!aScanFromCaretPointResult.GetContent()->IsText() ||
HTMLEditUtils::IsRemovableNode(*aScanFromCaretPointResult.GetContent())) {
return aScanFromCaretPointResult.GetContent();
}
// aScanFromCaretPointResult is non-removable text node.
// Since we try removing atomic content, we look for removable node from
// scanned point that is non-removable text.
nsIContent* removableRoot = aScanFromCaretPointResult.GetContent();
while (removableRoot && !HTMLEditUtils::IsRemovableNode(*removableRoot)) {
removableRoot = removableRoot->GetParent();
}
if (removableRoot) {
return removableRoot;
}
// Not found better content. This content may not be removable.
return aScanFromCaretPointResult.GetContent();
}
nsresult
HTMLEditor::AutoDeleteRangesHandler::ComputeRangesToDeleteAtomicContent(
const nsIContent& aAtomicContent,
AutoClonedSelectionRangeArray& aRangesToDelete) const {
EditorDOMRange rangeToDelete =
WSRunScanner::GetRangesForDeletingAtomicContent(
WSRunScanner::Scan::EditableNodes, aAtomicContent);
if (!rangeToDelete.IsPositioned()) {
NS_WARNING("WSRunScanner::GetRangeForDeleteAContentNode() failed");
return NS_ERROR_FAILURE;
}
// FIXME: If we'll delete unnecessary following <br>, we need to include it
// into aRangesToDelete.
nsresult rv = aRangesToDelete.SetStartAndEnd(rangeToDelete.StartRef(),
rangeToDelete.EndRef());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoClonedRangeArray::SetStartAndEnd() failed");
return rv;
}
Result<CaretPoint, nsresult>
HTMLEditor::AutoDeleteRangesHandler::HandleDeleteAtomicContent(
HTMLEditor& aHTMLEditor, nsIContent& aAtomicContent,
const EditorDOMPoint& aCaretPoint, const WSRunScanner& aWSRunScannerAtCaret,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!HTMLEditUtils::IsInvisibleBRElement(aAtomicContent));
MOZ_ASSERT(!aAtomicContent.IsEditingHost());
EditorDOMPoint pointToPutCaret = aCaretPoint;
{
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
Result<CaretPoint, nsresult> caretPointOrError =
WhiteSpaceVisibilityKeeper::DeleteContentNodeAndJoinTextNodesAroundIt(
aHTMLEditor, aAtomicContent, aCaretPoint, aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::"
"DeleteContentNodeAndJoinTextNodesAroundIt() failed");
return caretPointOrError;
}
trackPointToPutCaret.FlushAndStopTracking();
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, aHTMLEditor,
{SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
if (NS_WARN_IF(!pointToPutCaret.IsSet())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
if (MOZ_LIKELY(pointToPutCaret.IsInContentNode())) {
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv =
aHTMLEditor.EnsureNoFollowingUnnecessaryLineBreak(pointToPutCaret);
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::EnsureNoFollowingUnnecessaryLineBreak() failed");
return Err(rv);
}
}
if (NS_WARN_IF(!pointToPutCaret.IsSet())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
if ((aHTMLEditor.IsMailEditor() || aHTMLEditor.IsPlaintextMailComposer()) &&
MOZ_LIKELY(pointToPutCaret.IsInContentNode())) {
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv = aHTMLEditor.DeleteMostAncestorMailCiteElementIfEmpty(
MOZ_KnownLive(*pointToPutCaret.ContainerAs<nsIContent>()));
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::DeleteMostAncestorMailCiteElementIfEmpty() failed");
return Err(rv);
}
trackPointToPutCaret.FlushAndStopTracking();
if (NS_WARN_IF(!pointToPutCaret.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
if (aHTMLEditor.GetTopLevelEditSubAction() ==
EditSubAction::eDeleteSelectedContent) {
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
Result<CreateLineBreakResult, nsresult> insertPaddingBRElementOrError =
aHTMLEditor.InsertPaddingBRElementIfNeeded(
pointToPutCaret,
aEditingHost.IsContentEditablePlainTextOnly() ? nsIEditor::eNoStrip
: nsIEditor::eStrip,
aEditingHost);
if (MOZ_UNLIKELY(insertPaddingBRElementOrError.isErr())) {
NS_WARNING("HTMLEditor::InsertPaddingBRElementIfNeeded() failed");
return insertPaddingBRElementOrError.propagateErr();
}
trackPointToPutCaret.FlushAndStopTracking();
if (!pointToPutCaret.IsInTextNode()) {
insertPaddingBRElementOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion});
if (NS_WARN_IF(!pointToPutCaret.IsSet())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
} else {
insertPaddingBRElementOrError.unwrap().IgnoreCaretPointSuggestion();
if (NS_WARN_IF(!pointToPutCaret.IsSet())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
}
return CaretPoint(std::move(pointToPutCaret));
}
// static
Result<bool, nsresult> HTMLEditor::AutoDeleteRangesHandler::
ExtendRangeToContainAncestorInlineElementsAtStart(
nsRange& aRangeToDelete, const Element& aEditingHost) {
MOZ_ASSERT(aRangeToDelete.IsPositioned());
MOZ_ASSERT(aRangeToDelete.GetCommonAncestorContainer(IgnoreErrors()));
MOZ_ASSERT(aRangeToDelete.GetCommonAncestorContainer(IgnoreErrors())
->IsInclusiveDescendantOf(&aEditingHost));
EditorRawDOMPoint startPoint(aRangeToDelete.StartRef());
if (startPoint.IsInTextNode()) {
if (!startPoint.IsStartOfContainer()) {
// FIXME: If before the point has only collapsible white-spaces and the
// text node follows a block boundary, we should treat the range start
// from start of the text node.
return true;
}
startPoint.Set(startPoint.ContainerAs<Text>());
if (NS_WARN_IF(!startPoint.IsSet())) {
return Err(NS_ERROR_FAILURE);
}
if (startPoint.GetContainer() == &aEditingHost) {
return false;
}
} else if (startPoint.IsInDataNode()) {
startPoint.Set(startPoint.ContainerAs<nsIContent>());
if (NS_WARN_IF(!startPoint.IsSet())) {
return Err(NS_ERROR_FAILURE);
}
if (startPoint.GetContainer() == &aEditingHost) {
return false;
}
} else if (startPoint.GetContainer() == &aEditingHost) {
return false;
}
// FYI: This method is designed for deleting inline elements which become
// empty if aRangeToDelete which crosses a block boundary of right block
// child. Therefore, you may need to improve this method if you want to use
// this in the other cases.
nsINode* const commonAncestor =
nsContentUtils::GetClosestCommonInclusiveAncestor(
startPoint.GetContainer(), aRangeToDelete.GetEndContainer());
if (NS_WARN_IF(!commonAncestor)) {
return Err(NS_ERROR_FAILURE);
}
MOZ_ASSERT(commonAncestor->IsInclusiveDescendantOf(&aEditingHost));
EditorRawDOMPoint newStartPoint(startPoint);
while (newStartPoint.GetContainer() != &aEditingHost &&
newStartPoint.GetContainer() != commonAncestor) {
if (NS_WARN_IF(!newStartPoint.IsInContentNode())) {
return Err(NS_ERROR_FAILURE);
}
if (!HTMLEditUtils::IsInlineContent(
*newStartPoint.ContainerAs<nsIContent>(),
BlockInlineCheck::UseComputedDisplayOutsideStyle)) {
break;
}
// The container is inline, check whether the point is first visible point
// or not to consider whether climbing up the tree.
bool foundVisiblePrevSibling = false;
for (nsIContent* content = newStartPoint.GetPreviousSiblingOfChild();
content; content = content->GetPreviousSibling()) {
if (Text* text = Text::FromNode(content)) {
if (HTMLEditUtils::IsVisibleTextNode(*text)) {
foundVisiblePrevSibling = true;
break;
}
// The text node is invisible.
} else if (content->IsComment()) {
// Ignore the comment node.
} else if (!HTMLEditUtils::IsInlineContent(
*content,
BlockInlineCheck::UseComputedDisplayOutsideStyle) ||
!HTMLEditUtils::IsEmptyNode(
*content,
{EmptyCheckOption::TreatSingleBRElementAsVisible})) {
foundVisiblePrevSibling = true;
break;
}
}
if (foundVisiblePrevSibling) {
break;
}
// the point can be treated as start of the parent inline now.
newStartPoint.Set(newStartPoint.ContainerAs<nsIContent>());
if (NS_WARN_IF(!newStartPoint.IsSet())) {
return Err(NS_ERROR_FAILURE);
}
}
if (newStartPoint == startPoint) {
return false; // Don't need to modify the range
}
IgnoredErrorResult error;
aRangeToDelete.SetStart(newStartPoint.ToRawRangeBoundary(), error);
if (MOZ_UNLIKELY(error.Failed())) {
return Err(NS_ERROR_FAILURE);
}
return true;
}
bool HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
PrepareToDeleteAtOtherBlockBoundary(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount, Element& aOtherBlockElement,
const EditorDOMPoint& aCaretPoint,
const WSRunScanner& aWSRunScannerAtCaret) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(aCaretPoint.IsSetAndValid());
mMode = Mode::JoinOtherBlock;
// Make sure it's not a table element. If so, cancel the operation
// (translation: users cannot backspace or delete across table cells)
if (HTMLEditUtils::IsAnyTableElement(&aOtherBlockElement)) {
return false;
}
// First find the adjacent node in the block
if (aDirectionAndAmount == nsIEditor::ePrevious) {
mLeafContentInOtherBlock = HTMLEditUtils::GetLastLeafContent(
aOtherBlockElement, {LeafNodeType::OnlyEditableLeafNode},
BlockInlineCheck::Unused, &aOtherBlockElement);
mLeftContent = mLeafContentInOtherBlock;
mRightContent = aCaretPoint.GetContainerAs<nsIContent>();
} else {
mLeafContentInOtherBlock = HTMLEditUtils::GetFirstLeafContent(
aOtherBlockElement, {LeafNodeType::OnlyEditableLeafNode},
BlockInlineCheck::Unused, &aOtherBlockElement);
mLeftContent = aCaretPoint.GetContainerAs<nsIContent>();
mRightContent = mLeafContentInOtherBlock;
}
// Next to a block. See if we are between the block and a `<br>`.
// If so, we really want to delete the `<br>`. Else join content at
// selection to the block.
const WSScanResult scanFromCaretResult =
aDirectionAndAmount == nsIEditor::eNext
? aWSRunScannerAtCaret.ScanPreviousVisibleNodeOrBlockBoundaryFrom(
aCaretPoint)
: aWSRunScannerAtCaret
.ScanInclusiveNextVisibleNodeOrBlockBoundaryFrom(aCaretPoint);
// If we found a `<br>` element, we need to delete it instead of joining the
// contents.
if (scanFromCaretResult.ReachedBRElement()) {
mBRElement = scanFromCaretResult.BRElementPtr();
mMode = Mode::DeleteBRElement;
return true;
}
return mLeftContent && mRightContent;
}
nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
ComputeRangeToDeleteLineBreak(const HTMLEditor& aHTMLEditor,
nsRange& aRangeToDelete,
const Element& aEditingHost,
ComputeRangeFor aComputeRangeFor) const {
// FIXME: Scan invisible leading white-spaces after the <br>.
MOZ_ASSERT_IF(mMode == Mode::DeleteBRElement, mBRElement);
MOZ_ASSERT_IF(mMode == Mode::DeletePrecedingBRElementOfBlock, mBRElement);
MOZ_ASSERT_IF(mMode == Mode::DeletePrecedingPreformattedLineBreak,
mPreformattedLineBreak.IsSetAndValid());
MOZ_ASSERT_IF(mMode == Mode::DeletePrecedingPreformattedLineBreak,
mPreformattedLineBreak.IsCharPreformattedNewLine());
MOZ_ASSERT_IF(aComputeRangeFor == ComputeRangeFor::GetTargetRanges,
aRangeToDelete.IsPositioned());
// If we're computing for beforeinput.getTargetRanges() and the inputType
// is not a simple deletion like replacing selected content with new
// content, the range should end at the original end boundary of the given
// range.
const bool preserveEndBoundary =
(mMode == Mode::DeletePrecedingBRElementOfBlock ||
mMode == Mode::DeletePrecedingPreformattedLineBreak) &&
aComputeRangeFor == ComputeRangeFor::GetTargetRanges &&
!MayEditActionDeleteAroundCollapsedSelection(aHTMLEditor.GetEditAction());
if (mMode != Mode::DeletePrecedingPreformattedLineBreak) {
Element* const mostDistantInlineAncestor =
HTMLEditUtils::GetMostDistantAncestorEditableEmptyInlineElement(
*mBRElement, BlockInlineCheck::UseComputedDisplayOutsideStyle,
&aEditingHost);
if (preserveEndBoundary) {
// FIXME: If the range ends at end of an inline element, we may need to
// extend the range.
IgnoredErrorResult error;
aRangeToDelete.SetStart(EditorRawDOMPoint(mostDistantInlineAncestor
? mostDistantInlineAncestor
: mBRElement)
.ToRawRangeBoundary(),
error);
NS_WARNING_ASSERTION(!error.Failed(), "nsRange::SetStart() failed");
MOZ_ASSERT_IF(!error.Failed(), !aRangeToDelete.Collapsed());
return error.StealNSResult();
}
IgnoredErrorResult error;
aRangeToDelete.SelectNode(
mostDistantInlineAncestor ? *mostDistantInlineAncestor : *mBRElement,
error);
NS_WARNING_ASSERTION(!error.Failed(), "nsRange::SelectNode() failed");
return error.StealNSResult();
}
Element* const mostDistantInlineAncestor =
mPreformattedLineBreak.ContainerAs<Text>()->TextDataLength() == 1
? HTMLEditUtils::GetMostDistantAncestorEditableEmptyInlineElement(
*mPreformattedLineBreak.ContainerAs<Text>(),
BlockInlineCheck::UseComputedDisplayOutsideStyle, &aEditingHost)
: nullptr;
if (!mostDistantInlineAncestor) {
if (preserveEndBoundary) {
// FIXME: If the range ends at end of an inline element, we may need to
// extend the range.
IgnoredErrorResult error;
aRangeToDelete.SetStart(mPreformattedLineBreak.ToRawRangeBoundary(),
error);
MOZ_ASSERT_IF(!error.Failed(), !aRangeToDelete.Collapsed());
NS_WARNING_ASSERTION(!error.Failed(), "nsRange::SetStart() failed");
return error.StealNSResult();
}
nsresult rv = aRangeToDelete.SetStartAndEnd(
mPreformattedLineBreak.ToRawRangeBoundary(),
mPreformattedLineBreak.NextPoint().ToRawRangeBoundary());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "nsRange::SetStartAndEnd() failed");
return rv;
}
if (preserveEndBoundary) {
// FIXME: If the range ends at end of an inline element, we may need to
// extend the range.
IgnoredErrorResult error;
aRangeToDelete.SetStart(
EditorRawDOMPoint(mostDistantInlineAncestor).ToRawRangeBoundary(),
error);
MOZ_ASSERT_IF(!error.Failed(), !aRangeToDelete.Collapsed());
NS_WARNING_ASSERTION(!error.Failed(), "nsRange::SetStart() failed");
return error.StealNSResult();
}
IgnoredErrorResult error;
aRangeToDelete.SelectNode(*mostDistantInlineAncestor, error);
NS_WARNING_ASSERTION(!error.Failed(), "nsRange::SelectNode() failed");
return error.StealNSResult();
}
Result<EditActionResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::HandleDeleteLineBreak(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPoint& aCaretPoint, const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(mBRElement || mPreformattedLineBreak.IsSet());
// If we're deleting selection (not replacing with new content), we should
// put caret to end of preceding text node if there is. Then, users can type
// text in it like the other browsers.
EditorDOMPoint pointToPutCaret = [&]() {
// but when we're deleting a preceding line break of current block, we
// should keep the caret position in the current block.
if (mMode == Mode::DeletePrecedingBRElementOfBlock ||
mMode == Mode::DeletePrecedingPreformattedLineBreak) {
return aCaretPoint;
}
if (!MayEditActionDeleteAroundCollapsedSelection(
aHTMLEditor.GetEditAction())) {
return EditorDOMPoint();
}
const WSRunScanner scanner(
WSRunScanner::Scan::EditableNodes, EditorRawDOMPoint(mBRElement),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
const WSScanResult maybePreviousText =
scanner.ScanPreviousVisibleNodeOrBlockBoundaryFrom(
EditorRawDOMPoint(mBRElement));
if (maybePreviousText.IsContentEditable() &&
maybePreviousText.InVisibleOrCollapsibleCharacters() &&
!HTMLEditor::GetLinkElement(maybePreviousText.TextPtr())) {
return maybePreviousText.PointAfterReachedContent<EditorDOMPoint>();
}
const WSScanResult maybeNextText =
scanner.ScanInclusiveNextVisibleNodeOrBlockBoundaryFrom(
EditorRawDOMPoint::After(*mBRElement));
if (maybeNextText.IsContentEditable() &&
maybeNextText.InVisibleOrCollapsibleCharacters()) {
return maybeNextText.PointAtReachedContent<EditorDOMPoint>();
}
return EditorDOMPoint();
}();
RefPtr<nsRange> rangeToDelete =
nsRange::Create(const_cast<Element*>(&aEditingHost));
MOZ_ASSERT(rangeToDelete);
nsresult rv =
ComputeRangeToDeleteLineBreak(aHTMLEditor, *rangeToDelete, aEditingHost,
ComputeRangeFor::ToDeleteTheRange);
if (NS_FAILED(rv)) {
NS_WARNING(
"AutoBlockElementsJoiner::ComputeRangeToDeleteLineBreak() failed");
return Err(rv);
}
Result<EditActionResult, nsresult> result = HandleDeleteNonCollapsedRange(
aHTMLEditor, aDirectionAndAmount, nsIEditor::eNoStrip, *rangeToDelete,
SelectionWasCollapsed::Yes, aEditingHost);
if (MOZ_UNLIKELY(result.isErr())) {
NS_WARNING(
"AutoBlockElementsJoiner::HandleDeleteNonCollapsedRange() failed");
return result;
}
if (mLeftContent && mRightContent &&
HTMLEditUtils::GetInclusiveAncestorAnyTableElement(*mLeftContent) !=
HTMLEditUtils::GetInclusiveAncestorAnyTableElement(*mRightContent)) {
return EditActionResult::HandledResult();
}
// Put selection at edge of block and we are done.
if (NS_WARN_IF(mMode == Mode::DeleteBRElement && !mLeafContentInOtherBlock)) {
// XXX This must be odd case. The other block can be empty.
return Err(NS_ERROR_FAILURE);
}
if (StaticPrefs::editor_white_space_normalization_blink_compatible() &&
(mMode == Mode::DeletePrecedingBRElementOfBlock ||
mMode == Mode::DeletePrecedingPreformattedLineBreak) &&
pointToPutCaret.IsSetAndValidInComposedDoc()) {
// If we're deleting only the preceding lines of a block, we should
// normalize the white-spaces at start of the block for compatibility
// with the other browsers.
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
Result<EditorDOMPoint, nsresult> atFirstVisibleThingOrError =
WhiteSpaceVisibilityKeeper::NormalizeWhiteSpacesAfter(
aHTMLEditor, pointToPutCaret, {});
if (MOZ_UNLIKELY(atFirstVisibleThingOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::NormalizeWhiteSpacesAfter() failed");
return atFirstVisibleThingOrError.propagateErr();
}
trackPointToPutCaret.FlushAndStopTracking();
if (NS_WARN_IF(!pointToPutCaret.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
if (pointToPutCaret.IsSet()) {
nsresult rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
if (mMode == Mode::DeleteBRElement && NS_SUCCEEDED(rv)) {
// If we prefer to use style in the previous line, we should forget
// previous styles since the caret position has all styles which we want
// to use with new content.
if (nsIEditor::DirectionIsBackspace(aDirectionAndAmount)) {
aHTMLEditor.TopLevelEditSubActionDataRef()
.mCachedPendingStyles->Clear();
}
// And we don't want to keep extending a link at ex-end of the previous
// paragraph.
if (HTMLEditor::GetLinkElement(pointToPutCaret.GetContainer())) {
aHTMLEditor.mPendingStylesToApplyToNewContent
->ClearLinkAndItsSpecifiedStyle();
}
} else {
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
}
return EditActionResult::HandledResult();
}
EditorRawDOMPoint newCaretPosition =
HTMLEditUtils::GetGoodCaretPointFor<EditorRawDOMPoint>(
*mLeafContentInOtherBlock, aDirectionAndAmount);
if (MOZ_UNLIKELY(!newCaretPosition.IsInContentNode())) {
NS_WARNING("HTMLEditUtils::GetGoodCaretPointFor() failed");
return Err(NS_ERROR_FAILURE);
}
if (StaticPrefs::editor_white_space_normalization_blink_compatible()) {
// If we're deleting only a line break and move caret to left block, we
// want to normalize the white-spaces at end of the left block for the
// compatibility with the other browsers.
WSScanResult nextThingOfCaretPoint =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::All, newCaretPosition,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (nextThingOfCaretPoint.ReachedBRElement() ||
nextThingOfCaretPoint.ReachedPreformattedLineBreak()) {
nextThingOfCaretPoint =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::All,
nextThingOfCaretPoint
.PointAfterReachedContent<EditorRawDOMPoint>(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
}
if (nextThingOfCaretPoint.ReachedBlockBoundary()) {
const EditorDOMPoint atBlockBoundary =
nextThingOfCaretPoint.ReachedCurrentBlockBoundary()
? EditorDOMPoint::AtEndOf(*nextThingOfCaretPoint.ElementPtr())
: EditorDOMPoint(nextThingOfCaretPoint.ElementPtr());
Result<EditorDOMPoint, nsresult> afterLastVisibleThingOrError =
WhiteSpaceVisibilityKeeper::NormalizeWhiteSpacesBefore(
aHTMLEditor, atBlockBoundary, {});
if (MOZ_UNLIKELY(afterLastVisibleThingOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::NormalizeWhiteSpacesBefore() "
"failed");
return afterLastVisibleThingOrError.propagateErr();
}
}
}
rv = aHTMLEditor.CollapseSelectionTo(newCaretPosition);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
return EditActionResult::HandledResult();
}
nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
ComputeRangeToDeleteAtOtherBlockBoundary(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPoint& aCaretPoint, nsRange& aRangeToDelete,
const Element& aEditingHost) const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(aCaretPoint.IsSetAndValid());
MOZ_ASSERT(mLeftContent);
MOZ_ASSERT(mRightContent);
if (HTMLEditUtils::GetInclusiveAncestorAnyTableElement(*mLeftContent) !=
HTMLEditUtils::GetInclusiveAncestorAnyTableElement(*mRightContent)) {
if (!mDeleteRangesHandlerConst.CanFallbackToDeleteRangeWithTransaction(
aRangeToDelete)) {
nsresult rv = aRangeToDelete.CollapseTo(aCaretPoint.ToRawRangeBoundary());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "nsRange::CollapseTo() failed");
return rv;
}
nsresult rv = mDeleteRangesHandlerConst
.FallbackToComputeRangeToDeleteRangeWithTransaction(
aHTMLEditor, aRangeToDelete, aEditingHost);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::"
"FallbackToComputeRangeToDeleteRangeWithTransaction() failed");
return rv;
}
AutoInclusiveAncestorBlockElementsJoiner joiner(*mLeftContent,
*mRightContent);
Result<bool, nsresult> canJoinThem =
joiner.Prepare(aHTMLEditor, aEditingHost);
if (canJoinThem.isErr()) {
NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Prepare() failed");
return canJoinThem.unwrapErr();
}
if (canJoinThem.inspect() && joiner.CanJoinBlocks() &&
!joiner.ShouldDeleteLeafContentInstead()) {
nsresult rv =
joiner.ComputeRangeToDelete(aHTMLEditor, aCaretPoint, aRangeToDelete);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoInclusiveAncestorBlockElementsJoiner::"
"ComputeRangeToDelete() failed");
return rv;
}
// If AutoInclusiveAncestorBlockElementsJoiner didn't handle it and it's not
// canceled, user may want to modify the start leaf node or the last leaf
// node of the block.
if (mLeafContentInOtherBlock == aCaretPoint.GetContainer()) {
return NS_OK;
}
AutoHideSelectionChanges hideSelectionChanges(aHTMLEditor.SelectionRef());
// If it's ignored, it didn't modify the DOM tree. In this case, user must
// want to delete nearest leaf node in the other block element.
// TODO: We need to consider this before calling ComputeRangesToDelete() for
// computing the deleting range.
EditorRawDOMPoint newCaretPoint =
aDirectionAndAmount == nsIEditor::ePrevious
? EditorRawDOMPoint::AtEndOf(*mLeafContentInOtherBlock)
: EditorRawDOMPoint(mLeafContentInOtherBlock, 0);
// If new caret position is same as current caret position, we can do
// nothing anymore.
if (aRangeToDelete.Collapsed() &&
aRangeToDelete.EndRef() == newCaretPoint.ToRawRangeBoundary()) {
return NS_OK;
}
// TODO: Stop modifying the `Selection` for computing the target ranges.
nsresult rv = aHTMLEditor.CollapseSelectionTo(newCaretPoint);
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the editor");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed");
if (NS_SUCCEEDED(rv)) {
AutoClonedSelectionRangeArray rangeArray(aHTMLEditor.SelectionRef());
if (!rangeArray.GetAncestorLimiter()) {
rangeArray.SetAncestorLimiter(
aHTMLEditor.FindSelectionRoot(aEditingHost));
}
AutoDeleteRangesHandler anotherHandler(mDeleteRangesHandlerConst);
rv = anotherHandler.ComputeRangesToDelete(aHTMLEditor, aDirectionAndAmount,
rangeArray, aEditingHost);
if (NS_SUCCEEDED(rv)) {
if (MOZ_LIKELY(!rangeArray.Ranges().IsEmpty())) {
MOZ_ASSERT(rangeArray.Ranges().Length() == 1);
aRangeToDelete.SetStartAndEnd(rangeArray.FirstRangeRef()->StartRef(),
rangeArray.FirstRangeRef()->EndRef());
} else {
NS_WARNING(
"Recursive AutoDeleteRangesHandler::ComputeRangesToDelete() "
"returned no range");
rv = NS_ERROR_FAILURE;
}
} else {
NS_WARNING(
"Recursive AutoDeleteRangesHandler::ComputeRangesToDelete() failed");
}
}
// Restore selection.
nsresult rvCollapsingSelectionTo =
aHTMLEditor.CollapseSelectionTo(aCaretPoint);
if (MOZ_UNLIKELY(rvCollapsingSelectionTo == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the editor");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvCollapsingSelectionTo),
"EditorBase::CollapseSelectionTo() failed to restore caret position");
return NS_SUCCEEDED(rv) && NS_SUCCEEDED(rvCollapsingSelectionTo)
? NS_OK
: NS_ERROR_FAILURE;
}
Result<EditActionResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::HandleDeleteAtOtherBlockBoundary(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
const EditorDOMPoint& aCaretPoint, nsRange& aRangeToDelete,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(aCaretPoint.IsSetAndValid());
MOZ_ASSERT(mDeleteRangesHandler);
MOZ_ASSERT(mLeftContent);
MOZ_ASSERT(mRightContent);
if (HTMLEditUtils::GetInclusiveAncestorAnyTableElement(*mLeftContent) !=
HTMLEditUtils::GetInclusiveAncestorAnyTableElement(*mRightContent)) {
// If we have not deleted `<br>` element and are not called recursively,
// we should call `DeleteRangesWithTransaction()` here.
if (!mDeleteRangesHandler->CanFallbackToDeleteRangeWithTransaction(
aRangeToDelete)) {
return EditActionResult::IgnoredResult();
}
Result<CaretPoint, nsresult> caretPointOrError =
mDeleteRangesHandler->FallbackToDeleteRangeWithTransaction(
aHTMLEditor, aRangeToDelete);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"AutoDeleteRangesHandler::FallbackToDeleteRangesWithTransaction() "
"failed");
return caretPointOrError.propagateErr();
}
nsresult rv = caretPointOrError.inspect().SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
// Don't return "ignored" to avoid to fall it back to delete ranges
// recursively.
return EditActionResult::HandledResult();
}
// Else we are joining content to block
AutoInclusiveAncestorBlockElementsJoiner joiner(*mLeftContent,
*mRightContent);
Result<bool, nsresult> canJoinThem =
joiner.Prepare(aHTMLEditor, aEditingHost);
if (MOZ_UNLIKELY(canJoinThem.isErr())) {
NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Prepare() failed");
return canJoinThem.propagateErr();
}
if (!canJoinThem.inspect() || !joiner.CanJoinBlocks()) {
nsresult rv = aHTMLEditor.CollapseSelectionTo(aCaretPoint);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
return !canJoinThem.inspect() ? EditActionResult::CanceledResult()
: EditActionResult::IgnoredResult();
}
EditorDOMPoint pointToPutCaret(aCaretPoint);
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
Result<DeleteRangeResult, nsresult> moveFirstLineResult =
joiner.Run(aHTMLEditor, aEditingHost);
if (MOZ_UNLIKELY(moveFirstLineResult.isErr())) {
NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Run() failed");
return moveFirstLineResult.propagateErr();
}
DeleteRangeResult unwrappedMoveFirstLineResult = moveFirstLineResult.unwrap();
#ifdef DEBUG
if (joiner.ShouldDeleteLeafContentInstead()) {
NS_ASSERTION(unwrappedMoveFirstLineResult.Ignored(),
"Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` "
"returning ignored, but returned not ignored");
} else {
NS_ASSERTION(!unwrappedMoveFirstLineResult.Ignored(),
"Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` "
"returning handled, but returned ignored");
}
#endif // #ifdef DEBUG
// If we're deleting selection (not replacing with new content) and
// AutoInclusiveAncestorBlockElementsJoiner computed new caret position,
// we should use it. Otherwise, we should keep the our traditional behavior.
if (unwrappedMoveFirstLineResult.Handled() &&
unwrappedMoveFirstLineResult.HasCaretPointSuggestion() &&
MayEditActionDeleteAroundCollapsedSelection(
aHTMLEditor.GetEditAction())) {
EditorDOMPoint pointToPutCaret =
unwrappedMoveFirstLineResult.UnwrapCaretPoint();
nsresult rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed, but ignored");
return EditActionResult::HandledResult();
}
// If we prefer to use style in the previous line, we should forget
// previous styles since the caret position has all styles which we want
// to use with new content.
if (nsIEditor::DirectionIsBackspace(aDirectionAndAmount)) {
aHTMLEditor.TopLevelEditSubActionDataRef().mCachedPendingStyles->Clear();
}
// And we don't want to keep extending a link at ex-end of the previous
// paragraph.
if (HTMLEditor::GetLinkElement(pointToPutCaret.GetContainer())) {
aHTMLEditor.mPendingStylesToApplyToNewContent
->ClearLinkAndItsSpecifiedStyle();
}
return EditActionResult::HandledResult();
}
trackPointToPutCaret.FlushAndStopTracking();
unwrappedMoveFirstLineResult.IgnoreCaretPointSuggestion();
// If AutoInclusiveAncestorBlockElementsJoiner didn't handle it and it's not
// canceled, user may want to modify the start leaf node or the last leaf
// node of the block.
if (unwrappedMoveFirstLineResult.Ignored() &&
mLeafContentInOtherBlock != aCaretPoint.GetContainer()) {
// If it's ignored, it didn't modify the DOM tree. In this case, user
// must want to delete nearest leaf node in the other block element.
// TODO: We need to consider this before calling Run() for computing the
// deleting range.
EditorRawDOMPoint newCaretPoint =
aDirectionAndAmount == nsIEditor::ePrevious
? EditorRawDOMPoint::AtEndOf(*mLeafContentInOtherBlock)
: EditorRawDOMPoint(mLeafContentInOtherBlock, 0);
// If new caret position is same as current caret position, we can do
// nothing anymore.
if (aRangeToDelete.Collapsed() &&
aRangeToDelete.EndRef() == newCaretPoint.ToRawRangeBoundary()) {
return EditActionResult::CanceledResult();
}
nsresult rv = aHTMLEditor.CollapseSelectionTo(newCaretPoint);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed");
return Err(rv);
}
AutoClonedSelectionRangeArray rangesToDelete(aHTMLEditor.SelectionRef());
if (!rangesToDelete.GetAncestorLimiter()) {
rangesToDelete.SetAncestorLimiter(
aHTMLEditor.FindSelectionRoot(aEditingHost));
}
AutoDeleteRangesHandler anotherHandler(mDeleteRangesHandler);
Result<EditActionResult, nsresult> fallbackResult =
anotherHandler.Run(aHTMLEditor, aDirectionAndAmount, aStripWrappers,
rangesToDelete, aEditingHost);
if (MOZ_UNLIKELY(fallbackResult.isErr())) {
NS_WARNING("Recursive AutoDeleteRangesHandler::Run() failed");
return fallbackResult;
}
return fallbackResult;
}
// Otherwise, we must have deleted the selection as user expected.
nsresult rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
return unwrappedMoveFirstLineResult.Handled()
? EditActionResult::HandledResult()
: EditActionResult::IgnoredResult();
}
bool HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
PrepareToDeleteAtCurrentBlockBoundary(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount,
Element& aCurrentBlockElement, const EditorDOMPoint& aCaretPoint,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
// At edge of our block. Look beside it and see if we can join to an
// adjacent block
mMode = Mode::JoinCurrentBlock;
// Don't break the basic structure of the HTML document.
if (aCurrentBlockElement.IsAnyOfHTMLElements(nsGkAtoms::html, nsGkAtoms::head,
nsGkAtoms::body)) {
return false;
}
// Make sure it's not a table element. If so, cancel the operation
// (translation: users cannot backspace or delete across table cells)
if (HTMLEditUtils::IsAnyTableElement(&aCurrentBlockElement)) {
return false;
}
auto ScanJoinTarget = [&]() -> nsIContent* {
nsIContent* targetContent =
aDirectionAndAmount == nsIEditor::ePrevious
? HTMLEditUtils::GetPreviousContent(
aCurrentBlockElement, {WalkTreeOption::IgnoreNonEditableNode},
BlockInlineCheck::Unused, &aEditingHost)
: HTMLEditUtils::GetNextContent(
aCurrentBlockElement, {WalkTreeOption::IgnoreNonEditableNode},
BlockInlineCheck::Unused, &aEditingHost);
// If found content is an invisible text node, let's scan visible things.
auto IsIgnorableDataNode = [](nsIContent* aContent) {
return aContent && HTMLEditUtils::IsRemovableNode(*aContent) &&
((aContent->IsText() &&
aContent->AsText()->TextIsOnlyWhitespace() &&
!HTMLEditUtils::IsVisibleTextNode(*aContent->AsText())) ||
(aContent->IsCharacterData() && !aContent->IsText()));
};
if (!IsIgnorableDataNode(targetContent)) {
return targetContent;
}
MOZ_ASSERT(mSkippedInvisibleContents.IsEmpty());
for (nsIContent* adjacentContent =
aDirectionAndAmount == nsIEditor::ePrevious
? HTMLEditUtils::GetPreviousContent(
*targetContent, {WalkTreeOption::StopAtBlockBoundary},
BlockInlineCheck::UseComputedDisplayOutsideStyle,
&aEditingHost)
: HTMLEditUtils::GetNextContent(
*targetContent, {WalkTreeOption::StopAtBlockBoundary},
BlockInlineCheck::UseComputedDisplayOutsideStyle,
&aEditingHost);
adjacentContent;
adjacentContent =
aDirectionAndAmount == nsIEditor::ePrevious
? HTMLEditUtils::GetPreviousContent(
*adjacentContent, {WalkTreeOption::StopAtBlockBoundary},
BlockInlineCheck::UseComputedDisplayOutsideStyle,
&aEditingHost)
: HTMLEditUtils::GetNextContent(
*adjacentContent, {WalkTreeOption::StopAtBlockBoundary},
BlockInlineCheck::UseComputedDisplayOutsideStyle,
&aEditingHost)) {
// If non-editable element is found, we should not skip it to avoid
// joining too far nodes.
if (!HTMLEditUtils::IsSimplyEditableNode(*adjacentContent)) {
break;
}
// If block element is found, we should join last leaf content in it.
if (HTMLEditUtils::IsBlockElement(
*adjacentContent,
BlockInlineCheck::UseComputedDisplayOutsideStyle)) {
nsIContent* leafContent =
aDirectionAndAmount == nsIEditor::ePrevious
? HTMLEditUtils::GetLastLeafContent(
*adjacentContent, {LeafNodeType::OnlyEditableLeafNode})
: HTMLEditUtils::GetFirstLeafContent(
*adjacentContent, {LeafNodeType::OnlyEditableLeafNode});
mSkippedInvisibleContents.AppendElement(*targetContent);
return leafContent ? leafContent : adjacentContent;
}
// Only when the found node is an invisible text node or a non-text data
// node, we should keep scanning.
if (IsIgnorableDataNode(adjacentContent)) {
mSkippedInvisibleContents.AppendElement(*targetContent);
targetContent = adjacentContent;
continue;
}
// Otherwise, we find a visible things. We should join with last found
// invisible text node.
break;
}
return targetContent;
};
if (aDirectionAndAmount == nsIEditor::ePrevious) {
const WSScanResult prevVisibleThing = [&]() {
// When Backspace at start of a block, we need to delete only a preceding
// <br> element if there is.
const Result<Element*, nsresult>
inclusiveAncestorOfRightChildBlockOrError = AutoBlockElementsJoiner::
GetMostDistantBlockAncestorIfPointIsStartAtBlock(aCaretPoint,
aEditingHost);
if (NS_WARN_IF(inclusiveAncestorOfRightChildBlockOrError.isErr()) ||
!inclusiveAncestorOfRightChildBlockOrError.inspect()) {
return WSScanResult::Error();
}
const WSScanResult prevVisibleThingBeforeCurrentBlock =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
EditorRawDOMPoint(
inclusiveAncestorOfRightChildBlockOrError.inspect()),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (!prevVisibleThingBeforeCurrentBlock.ReachedBRElement() &&
!prevVisibleThingBeforeCurrentBlock.ReachedPreformattedLineBreak()) {
return WSScanResult::Error();
}
// There is a preceding line break, but it may be invisible. Then, users
// want to delete its preceding content not only the line break.
// Therefore, let's check whether the line break follows another line
// break or a block boundary. In these cases, the line break causes an
// empty line which users may want to delete.
const auto atPrecedingLineBreak =
prevVisibleThingBeforeCurrentBlock
.PointAtReachedContent<EditorRawDOMPoint>();
MOZ_ASSERT(atPrecedingLineBreak.IsSet());
const WSScanResult prevVisibleThingBeforeLineBreak =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes, atPrecedingLineBreak,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (prevVisibleThingBeforeLineBreak.ReachedBRElement() ||
prevVisibleThingBeforeLineBreak.ReachedPreformattedLineBreak() ||
prevVisibleThingBeforeLineBreak.ReachedCurrentBlockBoundary()) {
// Target the latter line break for things simpler. It's easier to
// compute the target range.
MOZ_ASSERT_IF(
prevVisibleThingBeforeCurrentBlock.ReachedPreformattedLineBreak() &&
prevVisibleThingBeforeLineBreak.ReachedPreformattedLineBreak(),
prevVisibleThingBeforeCurrentBlock
.PointAtReachedContent<EditorRawDOMPoint>() !=
prevVisibleThingBeforeLineBreak
.PointAtReachedContent<EditorRawDOMPoint>());
return prevVisibleThingBeforeCurrentBlock;
}
return WSScanResult::Error();
}();
// If previous visible thing is a <br>, we should just delete it without
// unwrapping the first line of the right child block. Note that the <br>
// is always treated as invisible by HTMLEditUtils because it's immediately
// preceding <br> of the block boundary. However, deleting it is fine
// because the above checks whether it causes empty line or not.
if (prevVisibleThing.ReachedBRElement()) {
mMode = Mode::DeletePrecedingBRElementOfBlock;
mBRElement = prevVisibleThing.BRElementPtr();
return true;
}
// Same for a preformatted line break.
if (prevVisibleThing.ReachedPreformattedLineBreak()) {
mMode = Mode::DeletePrecedingPreformattedLineBreak;
mPreformattedLineBreak =
prevVisibleThing.PointAtReachedContent<EditorRawDOMPoint>()
.AsInText();
return true;
}
mLeftContent = ScanJoinTarget();
mRightContent = aCaretPoint.GetContainerAs<nsIContent>();
} else {
mRightContent = ScanJoinTarget();
mLeftContent = aCaretPoint.GetContainerAs<nsIContent>();
}
// Nothing to join
if (!mLeftContent || !mRightContent) {
return false;
}
// Don't cross table boundaries.
return HTMLEditUtils::GetInclusiveAncestorAnyTableElement(*mLeftContent) ==
HTMLEditUtils::GetInclusiveAncestorAnyTableElement(*mRightContent);
}
nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
ComputeRangeToDeleteAtCurrentBlockBoundary(
const HTMLEditor& aHTMLEditor, const EditorDOMPoint& aCaretPoint,
nsRange& aRangeToDelete, const Element& aEditingHost) const {
MOZ_ASSERT(mLeftContent);
MOZ_ASSERT(mRightContent);
AutoInclusiveAncestorBlockElementsJoiner joiner(*mLeftContent,
*mRightContent);
Result<bool, nsresult> canJoinThem =
joiner.Prepare(aHTMLEditor, aEditingHost);
if (canJoinThem.isErr()) {
NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Prepare() failed");
return canJoinThem.unwrapErr();
}
if (canJoinThem.inspect()) {
nsresult rv =
joiner.ComputeRangeToDelete(aHTMLEditor, aCaretPoint, aRangeToDelete);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoInclusiveAncestorBlockElementsJoiner::"
"ComputeRangesToDelete() failed");
return rv;
}
// In this case, nothing will be deleted so that the affected range should
// be collapsed.
nsresult rv = aRangeToDelete.CollapseTo(aCaretPoint.ToRawRangeBoundary());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "nsRange::CollapseTo() failed");
return rv;
}
Result<EditActionResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::HandleDeleteAtCurrentBlockBoundary(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPoint& aCaretPoint, const Element& aEditingHost) {
MOZ_ASSERT(mLeftContent);
MOZ_ASSERT(mRightContent);
AutoInclusiveAncestorBlockElementsJoiner joiner(*mLeftContent,
*mRightContent);
Result<bool, nsresult> canJoinThem =
joiner.Prepare(aHTMLEditor, aEditingHost);
if (MOZ_UNLIKELY(canJoinThem.isErr())) {
NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Prepare() failed");
return Err(canJoinThem.unwrapErr());
}
if (!canJoinThem.inspect() || !joiner.CanJoinBlocks()) {
nsresult rv = aHTMLEditor.CollapseSelectionTo(aCaretPoint);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
return !canJoinThem.inspect() ? EditActionResult::CanceledResult()
: EditActionResult::HandledResult();
}
EditorDOMPoint pointToPutCaret(aCaretPoint);
AutoTrackDOMPoint tracker(aHTMLEditor.RangeUpdaterRef(), &pointToPutCaret);
Result<DeleteRangeResult, nsresult> moveFirstLineResult =
joiner.Run(aHTMLEditor, aEditingHost);
if (MOZ_UNLIKELY(moveFirstLineResult.isErr())) {
NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Run() failed");
return moveFirstLineResult.propagateErr();
}
DeleteRangeResult unwrappedMoveFirstLineResult = moveFirstLineResult.unwrap();
MOZ_ASSERT_IF(
unwrappedMoveFirstLineResult.HasCaretPointSuggestion(),
HTMLEditUtils::IsSimplyEditableNode(
*unwrappedMoveFirstLineResult.CaretPointRef().GetContainer()));
#ifdef DEBUG
if (joiner.ShouldDeleteLeafContentInstead()) {
NS_ASSERTION(unwrappedMoveFirstLineResult.Ignored(),
"Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` "
"returning ignored, but returned not ignored");
} else {
NS_ASSERTION(!unwrappedMoveFirstLineResult.Ignored(),
"Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` "
"returning handled, but returned ignored");
}
#endif // #ifdef DEBUG
// Cleaning up invisible nodes which are skipped at scanning mLeftContent or
// mRightContent.
{
AutoTrackDOMDeleteRangeResult trackMoveFirstLineResult(
aHTMLEditor.RangeUpdaterRef(), &unwrappedMoveFirstLineResult);
for (const OwningNonNull<nsIContent>& content : mSkippedInvisibleContents) {
nsresult rv =
aHTMLEditor.DeleteNodeWithTransaction(MOZ_KnownLive(content));
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return Err(rv);
}
}
mSkippedInvisibleContents.Clear();
trackMoveFirstLineResult.FlushAndStopTracking();
if (unwrappedMoveFirstLineResult.HasCaretPointSuggestion() &&
NS_WARN_IF(!HTMLEditUtils::IsSimplyEditableNode(
*unwrappedMoveFirstLineResult.CaretPointRef().GetContainer()))) {
unwrappedMoveFirstLineResult.ForgetCaretPointSuggestion();
}
}
// If we're deleting selection (not replacing with new content) and
// AutoInclusiveAncestorBlockElementsJoiner computed new caret position, we
// should use it. Otherwise, we should keep the our traditional behavior.
if (unwrappedMoveFirstLineResult.Handled() &&
unwrappedMoveFirstLineResult.HasCaretPointSuggestion() &&
MayEditActionDeleteAroundCollapsedSelection(
aHTMLEditor.GetEditAction())) {
EditorDOMPoint pointToPutCaret =
unwrappedMoveFirstLineResult.UnwrapCaretPoint();
// Don't remove empty inline elements in the plaintext-only mode because
// nobody can restore the style again.
if (pointToPutCaret.IsInContentNodeAndValidInComposedDoc() &&
!aEditingHost.IsContentEditablePlainTextOnly() &&
MOZ_LIKELY(HTMLEditUtils::IsRemovableFromParentNode(
*pointToPutCaret.ContainerAs<nsIContent>()))) {
AutoTrackDOMPoint trackCaretPoint(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteEmptyInclusiveAncestorInlineElements(
MOZ_KnownLive(*pointToPutCaret.ContainerAs<nsIContent>()),
aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"HTMLEditor::DeleteEmptyInclusiveAncestorInlineElements() failed");
return caretPointOrError.propagateErr();
}
trackCaretPoint.FlushAndStopTracking();
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
}
if ((aHTMLEditor.IsMailEditor() || aHTMLEditor.IsPlaintextMailComposer()) &&
MOZ_LIKELY(pointToPutCaret.IsInContentNode())) {
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv = aHTMLEditor.DeleteMostAncestorMailCiteElementIfEmpty(
MOZ_KnownLive(*pointToPutCaret.ContainerAs<nsIContent>()));
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::DeleteMostAncestorMailCiteElementIfEmpty() failed");
return Err(rv);
}
trackPointToPutCaret.FlushAndStopTracking();
if (NS_WARN_IF(!pointToPutCaret.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
if (aHTMLEditor.GetTopLevelEditSubAction() ==
EditSubAction::eDeleteSelectedContent &&
pointToPutCaret.IsSetAndValidInComposedDoc()) {
AutoTrackDOMPoint trackCaretPoint(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
Result<CreateLineBreakResult, nsresult> insertPaddingBRElementOrError =
aHTMLEditor.InsertPaddingBRElementIfNeeded(
pointToPutCaret,
aEditingHost.IsContentEditablePlainTextOnly()
? nsIEditor::eNoStrip
: nsIEditor::eStrip,
aEditingHost);
if (MOZ_UNLIKELY(insertPaddingBRElementOrError.isErr())) {
NS_WARNING("HTMLEditor::InsertPaddingBRElementIfNeeded() failed");
return insertPaddingBRElementOrError.propagateErr();
}
insertPaddingBRElementOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
}
nsresult rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed, but ignored");
return EditActionResult::HandledResult();
}
// If we prefer to use style in the previous line, we should forget
// previous styles since the caret position has all styles which we want
// to use with new content.
if (nsIEditor::DirectionIsBackspace(aDirectionAndAmount)) {
aHTMLEditor.TopLevelEditSubActionDataRef().mCachedPendingStyles->Clear();
}
// And we don't want to keep extending a link at ex-end of the previous
// paragraph.
if (HTMLEditor::GetLinkElement(pointToPutCaret.GetContainer())) {
aHTMLEditor.mPendingStylesToApplyToNewContent
->ClearLinkAndItsSpecifiedStyle();
}
return EditActionResult::HandledResult();
}
unwrappedMoveFirstLineResult.IgnoreCaretPointSuggestion();
tracker.FlushAndStopTracking();
nsresult rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
// This should claim that trying to join the block means that
// this handles the action because the caller shouldn't do anything
// anymore in this case.
return EditActionResult::HandledResult();
}
nsresult
HTMLEditor::AutoDeleteRangesHandler::ComputeRangesToDeleteNonCollapsedRanges(
const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
AutoClonedSelectionRangeArray& aRangesToDelete,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost) const {
MOZ_ASSERT(!aRangesToDelete.IsCollapsed());
if (NS_WARN_IF(!aRangesToDelete.FirstRangeRef()->StartRef().IsSet()) ||
NS_WARN_IF(!aRangesToDelete.FirstRangeRef()->EndRef().IsSet())) {
return NS_ERROR_FAILURE;
}
if (aRangesToDelete.Ranges().Length() == 1) {
Result<EditorRawDOMRange, nsresult> result = ExtendOrShrinkRangeToDelete(
aHTMLEditor, aRangesToDelete.LimitersAndCaretDataRef(),
EditorRawDOMRange(aRangesToDelete.FirstRangeRef()));
if (MOZ_UNLIKELY(result.isErr())) {
NS_WARNING(
"AutoDeleteRangesHandler::ExtendOrShrinkRangeToDelete() failed");
return NS_ERROR_FAILURE;
}
EditorRawDOMRange newRange(result.unwrap());
if (MOZ_UNLIKELY(NS_FAILED(aRangesToDelete.FirstRangeRef()->SetStartAndEnd(
newRange.StartRef().ToRawRangeBoundary(),
newRange.EndRef().ToRawRangeBoundary())))) {
NS_WARNING("nsRange::SetStartAndEnd() failed");
return NS_ERROR_FAILURE;
}
if (MOZ_UNLIKELY(
NS_WARN_IF(!aRangesToDelete.FirstRangeRef()->IsPositioned()))) {
return NS_ERROR_FAILURE;
}
if (NS_WARN_IF(aRangesToDelete.FirstRangeRef()->Collapsed())) {
return NS_OK; // Hmm, there is nothing to delete...?
}
}
if (!aHTMLEditor.IsPlaintextMailComposer()) {
EditorDOMRange firstRange(aRangesToDelete.FirstRangeRef());
EditorDOMRange extendedRange =
WSRunScanner::GetRangeContainingInvisibleWhiteSpacesAtRangeBoundaries(
WSRunScanner::Scan::EditableNodes,
EditorDOMRange(aRangesToDelete.FirstRangeRef()));
if (firstRange != extendedRange) {
nsresult rv = aRangesToDelete.FirstRangeRef()->SetStartAndEnd(
extendedRange.StartRef().ToRawRangeBoundary(),
extendedRange.EndRef().ToRawRangeBoundary());
if (NS_FAILED(rv)) {
NS_WARNING("nsRange::SetStartAndEnd() failed");
return NS_ERROR_FAILURE;
}
}
}
if (aRangesToDelete.FirstRangeRef()->GetStartContainer() ==
aRangesToDelete.FirstRangeRef()->GetEndContainer()) {
if (!aRangesToDelete.FirstRangeRef()->Collapsed()) {
nsresult rv = ComputeRangesToDeleteRangesWithTransaction(
aHTMLEditor, aDirectionAndAmount, aRangesToDelete, aEditingHost);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::ComputeRangesToDeleteRangesWithTransaction("
") failed");
return rv;
}
// `DeleteUnnecessaryNodes()` may delete parent elements, but it does not
// affect computing target ranges. Therefore, we don't need to touch
// aRangesToDelete in this case.
return NS_OK;
}
Element* startCiteNode = aHTMLEditor.GetMostDistantAncestorMailCiteElement(
*aRangesToDelete.FirstRangeRef()->GetStartContainer());
Element* endCiteNode = aHTMLEditor.GetMostDistantAncestorMailCiteElement(
*aRangesToDelete.FirstRangeRef()->GetEndContainer());
if (startCiteNode && !endCiteNode) {
aDirectionAndAmount = nsIEditor::eNext;
} else if (!startCiteNode && endCiteNode) {
aDirectionAndAmount = nsIEditor::ePrevious;
}
for (const OwningNonNull<nsRange>& range : aRangesToDelete.Ranges()) {
if (MOZ_UNLIKELY(range->Collapsed())) {
continue;
}
AutoBlockElementsJoiner joiner(*this);
if (!joiner.PrepareToDeleteNonCollapsedRange(aHTMLEditor, range,
aEditingHost)) {
return NS_ERROR_FAILURE;
}
nsresult rv = joiner.ComputeRangeToDelete(
aHTMLEditor, aRangesToDelete, aDirectionAndAmount, range,
aSelectionWasCollapsed, aEditingHost);
if (NS_FAILED(rv)) {
NS_WARNING("AutoBlockElementsJoiner::ComputeRangeToDelete() failed");
return rv;
}
}
return NS_OK;
}
Result<EditActionResult, nsresult>
HTMLEditor::AutoDeleteRangesHandler::HandleDeleteNonCollapsedRanges(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
AutoClonedSelectionRangeArray& aRangesToDelete,
SelectionWasCollapsed aSelectionWasCollapsed, const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsTopLevelEditSubActionDataAvailable());
MOZ_ASSERT(!aRangesToDelete.IsCollapsed());
if (NS_WARN_IF(!aRangesToDelete.FirstRangeRef()->StartRef().IsSet()) ||
NS_WARN_IF(!aRangesToDelete.FirstRangeRef()->EndRef().IsSet())) {
return Err(NS_ERROR_FAILURE);
}
MOZ_ASSERT_IF(aRangesToDelete.Ranges().Length() == 1,
aRangesToDelete.IsFirstRangeEditable(aEditingHost));
// Else we have a non-collapsed selection. First adjust the selection.
// XXX Why do we extend selection only when there is only one range?
if (aRangesToDelete.Ranges().Length() == 1) {
Result<EditorRawDOMRange, nsresult> result = ExtendOrShrinkRangeToDelete(
aHTMLEditor, aRangesToDelete.LimitersAndCaretDataRef(),
EditorRawDOMRange(aRangesToDelete.FirstRangeRef()));
if (MOZ_UNLIKELY(result.isErr())) {
NS_WARNING(
"AutoDeleteRangesHandler::ExtendOrShrinkRangeToDelete() failed");
return Err(NS_ERROR_FAILURE);
}
EditorRawDOMRange newRange(result.unwrap());
if (NS_FAILED(aRangesToDelete.FirstRangeRef()->SetStartAndEnd(
newRange.StartRef().ToRawRangeBoundary(),
newRange.EndRef().ToRawRangeBoundary()))) {
NS_WARNING("nsRange::SetStartAndEnd() failed");
return Err(NS_ERROR_FAILURE);
}
if (NS_WARN_IF(!aRangesToDelete.FirstRangeRef()->IsPositioned())) {
return Err(NS_ERROR_FAILURE);
}
if (NS_WARN_IF(aRangesToDelete.FirstRangeRef()->Collapsed())) {
// Hmm, there is nothing to delete...?
// In this case, the callers want collapsed selection. Therefore, we need
// to change the `Selection` here.
nsresult rv = aHTMLEditor.CollapseSelectionTo(
aRangesToDelete.GetFirstRangeStartPoint<EditorRawDOMPoint>());
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed");
return Err(rv);
}
return EditActionResult::HandledResult();
}
MOZ_ASSERT(aRangesToDelete.IsFirstRangeEditable(aEditingHost));
}
// Remember that we did a ranged delete for the benefit of AfterEditInner().
aHTMLEditor.TopLevelEditSubActionDataRef().mDidDeleteNonCollapsedRange = true;
// Figure out if the endpoints are in nodes that can be merged. Adjust
// surrounding white-space in preparation to delete selection.
if (!aHTMLEditor.IsPlaintextMailComposer()) {
if (!StaticPrefs::editor_white_space_normalization_blink_compatible()) {
AutoTrackDOMRange firstRangeTracker(aHTMLEditor.RangeUpdaterRef(),
&aRangesToDelete.FirstRangeRef());
Result<CaretPoint, nsresult> caretPointOrError =
WhiteSpaceVisibilityKeeper::PrepareToDeleteRange(
aHTMLEditor, EditorDOMRange(aRangesToDelete.FirstRangeRef()),
aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("WhiteSpaceVisibilityKeeper::PrepareToDeleteRange() failed");
return caretPointOrError.propagateErr();
}
// Ignore caret point suggestion because there was
// AutoTransactionsConserveSelection.
caretPointOrError.unwrap().IgnoreCaretPointSuggestion();
} else {
MOZ_ASSERT(
StaticPrefs::editor_white_space_normalization_blink_compatible());
{
AutoTrackDOMRange firstRangeTracker(aHTMLEditor.RangeUpdaterRef(),
&aRangesToDelete.FirstRangeRef());
for (OwningNonNull<nsRange>& range :
Reversed(aRangesToDelete.Ranges())) {
if (MOZ_UNLIKELY(!range->IsPositioned() || range->Collapsed())) {
continue;
}
Maybe<AutoTrackDOMRange> trackRange;
if (range != aRangesToDelete.FirstRangeRef()) {
trackRange.emplace(aHTMLEditor.RangeUpdaterRef(), &range);
}
Result<EditorDOMRange, nsresult> rangeToDeleteOrError =
WhiteSpaceVisibilityKeeper::NormalizeSurroundingWhiteSpacesToJoin(
aHTMLEditor, EditorDOMRange(range));
if (MOZ_UNLIKELY(rangeToDeleteOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::"
"NormalizeSurroundingWhiteSpacesToJoin() failed");
return rangeToDeleteOrError.propagateErr();
}
trackRange.reset();
EditorDOMRange rangeToDelete = rangeToDeleteOrError.unwrap();
if (MOZ_LIKELY(rangeToDelete.IsPositionedAndValidInComposedDoc())) {
nsresult rv = range->SetStartAndEnd(
rangeToDelete.StartRef().ToRawRangeBoundary(),
rangeToDelete.EndRef().ToRawRangeBoundary());
if (NS_FAILED(rv)) {
NS_WARNING("nsRange::SetStartAndEnd() failed");
return Err(rv);
}
}
}
}
aRangesToDelete.RemoveCollapsedRanges();
if (MOZ_UNLIKELY(aRangesToDelete.IsCollapsed())) {
return EditActionResult::HandledResult();
}
}
if (NS_WARN_IF(!aRangesToDelete.FirstRangeRef()->IsPositioned()) ||
(aHTMLEditor.MayHaveMutationEventListeners() &&
NS_WARN_IF(!aRangesToDelete.IsFirstRangeEditable(aEditingHost)))) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::PrepareToDeleteRange() made the first "
"range invalid");
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
// XXX This is odd. We do we simply use `DeleteRangesWithTransaction()`
// only when **first** range is in same container?
if (aRangesToDelete.FirstRangeRef()->GetStartContainer() ==
aRangesToDelete.FirstRangeRef()->GetEndContainer()) {
// Because of previous DOM tree changes, the range may be collapsed.
// If we've already removed all contents in the range, we shouldn't
// delete anything around the caret.
if (!aRangesToDelete.FirstRangeRef()->Collapsed()) {
const auto stripWrappers = [&]() -> nsIEditor::EStripWrappers {
if (mOriginalStripWrappers == nsIEditor::eStrip &&
aEditingHost.IsContentEditablePlainTextOnly()) {
return nsIEditor::eNoStrip;
}
return mOriginalStripWrappers;
}();
AutoTrackDOMRange firstRangeTracker(aHTMLEditor.RangeUpdaterRef(),
&aRangesToDelete.FirstRangeRef());
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteRangesWithTransaction(
aDirectionAndAmount, stripWrappers, aRangesToDelete);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteRangesWithTransaction() failed");
return caretPointOrError.propagateErr();
}
firstRangeTracker.FlushAndStopTracking();
nsresult rv = caretPointOrError.inspect().SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
if (NS_WARN_IF(!aRangesToDelete.FirstRangeRef()->IsPositioned()) ||
(aHTMLEditor.MayHaveMutationEventListeners(
NS_EVENT_BITS_MUTATION_NODEREMOVED |
NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT |
NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED) &&
NS_WARN_IF(!aRangesToDelete.IsFirstRangeEditable(aEditingHost)))) {
NS_WARNING(
"HTMLEditor::DeleteRangesWithTransaction() made the first range "
"invalid");
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
// However, even if the range is removed, we may need to clean up the
// containers which become empty.
EditorDOMRange rangeToCleanUp(aRangesToDelete.FirstRangeRef());
AutoTrackDOMRange trackRangeToCleanUp(aHTMLEditor.RangeUpdaterRef(),
&rangeToCleanUp);
nsresult rv =
DeleteUnnecessaryNodes(aHTMLEditor, rangeToCleanUp, aEditingHost);
if (NS_FAILED(rv)) {
NS_WARNING("AutoDeleteRangesHandler::DeleteUnnecessaryNodes() failed");
return Err(rv);
}
trackRangeToCleanUp.FlushAndStopTracking();
if (NS_WARN_IF(!rangeToCleanUp.IsPositionedAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
const auto& pointToPutCaret =
!nsIEditor::DirectionIsBackspace(aDirectionAndAmount) ||
(aHTMLEditor.TopLevelEditSubActionDataRef()
.mDidDeleteEmptyParentBlocks &&
(aHTMLEditor.GetEditAction() == EditAction::eDrop ||
aHTMLEditor.GetEditAction() == EditAction::eDeleteByDrag))
? rangeToCleanUp.StartRef()
: rangeToCleanUp.EndRef();
rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed");
return Err(rv);
}
return EditActionResult::HandledResult();
}
if (NS_WARN_IF(
!aRangesToDelete.FirstRangeRef()->GetStartContainer()->IsContent()) ||
NS_WARN_IF(
!aRangesToDelete.FirstRangeRef()->GetEndContainer()->IsContent())) {
return Err(NS_ERROR_FAILURE);
}
// Figure out mailcite ancestors
RefPtr<Element> startCiteNode =
aHTMLEditor.GetMostDistantAncestorMailCiteElement(
*aRangesToDelete.FirstRangeRef()->GetStartContainer());
RefPtr<Element> endCiteNode =
aHTMLEditor.GetMostDistantAncestorMailCiteElement(
*aRangesToDelete.FirstRangeRef()->GetEndContainer());
// If we only have a mailcite at one of the two endpoints, set the
// directionality of the deletion so that the selection will end up
// outside the mailcite.
if (startCiteNode && !endCiteNode) {
aDirectionAndAmount = nsIEditor::eNext;
} else if (!startCiteNode && endCiteNode) {
aDirectionAndAmount = nsIEditor::ePrevious;
}
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
auto ret = EditActionResult::IgnoredResult();
for (const OwningNonNull<nsRange>& range : aRangesToDelete.Ranges()) {
if (MOZ_UNLIKELY(range->Collapsed())) {
continue;
}
AutoBlockElementsJoiner joiner(*this);
if (!joiner.PrepareToDeleteNonCollapsedRange(aHTMLEditor, range,
aEditingHost)) {
return Err(NS_ERROR_FAILURE);
}
Result<EditActionResult, nsresult> result =
joiner.Run(aHTMLEditor, aRangesToDelete.LimitersAndCaretDataRef(),
aDirectionAndAmount, aStripWrappers, MOZ_KnownLive(range),
aSelectionWasCollapsed, aEditingHost);
if (MOZ_UNLIKELY(result.isErr())) {
NS_WARNING("AutoBlockElementsJoiner::Run() failed");
return result;
}
ret |= result.inspect();
}
return ret;
}
bool HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
PrepareToDeleteNonCollapsedRange(const HTMLEditor& aHTMLEditor,
const nsRange& aRangeToDelete,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!aRangeToDelete.Collapsed());
mLeftContent = HTMLEditUtils::GetInclusiveAncestorElement(
*aRangeToDelete.GetStartContainer()->AsContent(),
HTMLEditUtils::ClosestEditableBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
mRightContent = HTMLEditUtils::GetInclusiveAncestorElement(
*aRangeToDelete.GetEndContainer()->AsContent(),
HTMLEditUtils::ClosestEditableBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
// Note that mLeftContent and/or mRightContent can be nullptr if editing host
// is an inline element. If both editable ancestor block is exactly same
// one or one reaches an inline editing host, we can just delete the content
// in ranges.
if (mLeftContent == mRightContent || !mLeftContent || !mRightContent) {
MOZ_ASSERT_IF(
!mLeftContent || !mRightContent,
aRangeToDelete.GetStartContainer()->AsContent()->GetEditingHost() ==
aRangeToDelete.GetEndContainer()->AsContent()->GetEditingHost());
mMode = Mode::DeleteContentInRange;
return true;
}
// If left block and right block are adjacent siblings and they are same
// type of elements, we can merge them after deleting the selected contents.
// MOOSE: this could conceivably screw up a table.. fix me.
if (mLeftContent->GetParentNode() == mRightContent->GetParentNode() &&
HTMLEditUtils::CanContentsBeJoined(*mLeftContent, *mRightContent) &&
// XXX What's special about these three types of block?
(mLeftContent->IsHTMLElement(nsGkAtoms::p) ||
HTMLEditUtils::IsListItem(mLeftContent) ||
HTMLEditUtils::IsHeader(*mLeftContent))) {
mMode = Mode::JoinBlocksInSameParent;
return true;
}
// If the range starts immediately after a line end and ends in a
// child right block, we should not unwrap the right block unless the
// right block will have no nodes.
if (mRightContent->IsInclusiveDescendantOf(mLeftContent)) {
// FYI: Chrome does not remove the right child block even if there will be
// only single <br> or a comment node in it. Therefore, we should use this
// rough check.
const WSScanResult nextVisibleThingOfEndBoundary =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
EditorRawDOMPoint(aRangeToDelete.EndRef()),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (!nextVisibleThingOfEndBoundary.ReachedCurrentBlockBoundary()) {
MOZ_ASSERT(mLeftContent->IsElement());
Result<Element*, nsresult> mostDistantBlockOrError =
AutoBlockElementsJoiner::
GetMostDistantBlockAncestorIfPointIsStartAtBlock(
EditorRawDOMPoint(mRightContent, 0), aEditingHost,
mLeftContent->AsElement());
MOZ_ASSERT(mostDistantBlockOrError.isOk());
if (MOZ_LIKELY(mostDistantBlockOrError.inspect())) {
const WSScanResult prevVisibleThingOfStartBoundary =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
EditorRawDOMPoint(aRangeToDelete.StartRef()),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (prevVisibleThingOfStartBoundary.ReachedBRElement()) {
// If the range start after a <br> followed by the block boundary,
// we want to delete the <br> or following <br> element unless it's
// not a part of empty line like `<div>abc<br>{<div>]def`.
const WSScanResult nextVisibleThingOfBR =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
EditorRawDOMPoint::After(
*prevVisibleThingOfStartBoundary.GetContent()),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
MOZ_ASSERT(!nextVisibleThingOfBR.ReachedCurrentBlockBoundary());
if (!nextVisibleThingOfBR.ReachedOtherBlockElement() ||
nextVisibleThingOfBR.GetContent() !=
mostDistantBlockOrError.inspect()) {
// The range selects a non-empty line or a child block at least.
mMode = Mode::DeletePrecedingLinesAndContentInRange;
return true;
}
const WSScanResult prevVisibleThingOfBR =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
EditorRawDOMPoint(
prevVisibleThingOfStartBoundary.GetContent()),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (prevVisibleThingOfBR.ReachedBRElement() ||
prevVisibleThingOfBR.ReachedPreformattedLineBreak() ||
prevVisibleThingOfBR.ReachedBlockBoundary()) {
// The preceding <br> causes an empty line.
mMode = Mode::DeletePrecedingLinesAndContentInRange;
return true;
}
} else if (prevVisibleThingOfStartBoundary
.ReachedPreformattedLineBreak()) {
const WSScanResult nextVisibleThingOfLineBreak =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
prevVisibleThingOfStartBoundary
.PointAfterReachedContent<EditorRawDOMPoint>(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
MOZ_ASSERT(
!nextVisibleThingOfLineBreak.ReachedCurrentBlockBoundary());
if (!nextVisibleThingOfLineBreak.ReachedOtherBlockElement() ||
nextVisibleThingOfLineBreak.GetContent() !=
mostDistantBlockOrError.inspect()) {
// The range selects a non-empty line or a child block at least.
mMode = Mode::DeletePrecedingLinesAndContentInRange;
return true;
}
const WSScanResult prevVisibleThingOfLineBreak =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
prevVisibleThingOfStartBoundary
.PointAtReachedContent<EditorRawDOMPoint>(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (prevVisibleThingOfLineBreak.ReachedBRElement() ||
prevVisibleThingOfLineBreak.ReachedPreformattedLineBreak() ||
prevVisibleThingOfLineBreak.ReachedBlockBoundary()) {
// The preceding line break causes an empty line.
mMode = Mode::DeletePrecedingLinesAndContentInRange;
return true;
}
} else if (prevVisibleThingOfStartBoundary
.ReachedCurrentBlockBoundary()) {
MOZ_ASSERT(prevVisibleThingOfStartBoundary.ElementPtr() ==
mLeftContent);
const WSScanResult firstVisibleThingInBlock =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
EditorRawDOMPoint(
prevVisibleThingOfStartBoundary.ElementPtr(), 0),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (!firstVisibleThingInBlock.ReachedOtherBlockElement() ||
firstVisibleThingInBlock.ElementPtr() !=
mostDistantBlockOrError.inspect()) {
mMode = Mode::DeletePrecedingLinesAndContentInRange;
return true;
}
} else if (prevVisibleThingOfStartBoundary.ReachedOtherBlockElement()) {
const WSScanResult firstVisibleThingAfterBlock =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
EditorRawDOMPoint::After(
*prevVisibleThingOfStartBoundary.ElementPtr()),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (!firstVisibleThingAfterBlock.ReachedOtherBlockElement() ||
firstVisibleThingAfterBlock.ElementPtr() !=
mostDistantBlockOrError.inspect()) {
mMode = Mode::DeletePrecedingLinesAndContentInRange;
return true;
}
}
}
}
}
mMode = Mode::DeleteNonCollapsedRange;
return true;
}
nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
ComputeRangeToDeleteContentInRange(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount, nsRange& aRangeToDelete,
const Element& aEditingHost) const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!aRangeToDelete.Collapsed());
MOZ_ASSERT(mMode == Mode::DeleteContentInRange);
MOZ_ASSERT(aRangeToDelete.GetStartContainer()->AsContent()->GetEditingHost());
MOZ_ASSERT(
aRangeToDelete.GetStartContainer()->AsContent()->GetEditingHost() ==
aRangeToDelete.GetEndContainer()->AsContent()->GetEditingHost());
MOZ_ASSERT(!mLeftContent == !mRightContent);
MOZ_ASSERT_IF(mLeftContent, mLeftContent->IsElement());
MOZ_ASSERT_IF(mLeftContent,
aRangeToDelete.GetStartContainer()->IsInclusiveDescendantOf(
mLeftContent));
MOZ_ASSERT_IF(mRightContent, mRightContent->IsElement());
MOZ_ASSERT_IF(
mRightContent,
aRangeToDelete.GetEndContainer()->IsInclusiveDescendantOf(mRightContent));
MOZ_ASSERT_IF(
!mLeftContent,
HTMLEditUtils::IsInlineContent(
*aRangeToDelete.GetStartContainer()->AsContent()->GetEditingHost(),
BlockInlineCheck::UseComputedDisplayOutsideStyle));
nsresult rv =
mDeleteRangesHandlerConst.ComputeRangeToDeleteRangeWithTransaction(
aHTMLEditor, aDirectionAndAmount, aRangeToDelete, aEditingHost);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::"
"ComputeRangeToDeleteRangeWithTransaction() failed");
return rv;
}
Result<EditActionResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::DeleteContentInRange(
HTMLEditor& aHTMLEditor,
const LimitersAndCaretData& aLimitersAndCaretData,
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers, nsRange& aRangeToDelete,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!aRangeToDelete.Collapsed());
MOZ_ASSERT(mMode == Mode::DeleteContentInRange);
MOZ_ASSERT(mDeleteRangesHandler);
MOZ_ASSERT(aRangeToDelete.GetStartContainer()->AsContent()->GetEditingHost());
MOZ_ASSERT(
aRangeToDelete.GetStartContainer()->AsContent()->GetEditingHost() ==
aRangeToDelete.GetEndContainer()->AsContent()->GetEditingHost());
MOZ_ASSERT_IF(mLeftContent, mLeftContent->IsElement());
MOZ_ASSERT_IF(mLeftContent,
aRangeToDelete.GetStartContainer()->IsInclusiveDescendantOf(
mLeftContent));
MOZ_ASSERT_IF(mRightContent, mRightContent->IsElement());
MOZ_ASSERT_IF(
mRightContent,
aRangeToDelete.GetEndContainer()->IsInclusiveDescendantOf(mRightContent));
MOZ_ASSERT_IF(
!mLeftContent,
HTMLEditUtils::IsInlineContent(
*aRangeToDelete.GetStartContainer()->AsContent()->GetEditingHost(),
BlockInlineCheck::UseComputedDisplayOutsideStyle));
const OwningNonNull<nsRange> rangeToDelete(aRangeToDelete);
if (StaticPrefs::editor_white_space_normalization_blink_compatible()) {
Result<EditorDOMRange, nsresult> rangeToDeleteOrError =
WhiteSpaceVisibilityKeeper::NormalizeSurroundingWhiteSpacesToJoin(
aHTMLEditor, EditorDOMRange(rangeToDelete));
if (MOZ_UNLIKELY(rangeToDeleteOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::NormalizeSurroundingWhiteSpacesToJoin() "
"failed");
return rangeToDeleteOrError.propagateErr();
}
nsresult rv = rangeToDeleteOrError.unwrap().SetToRange(rangeToDelete);
if (NS_FAILED(rv)) {
NS_WARNING("EditorDOMRange::SetToRange() failed");
return Err(rv);
}
}
if (!rangeToDelete->Collapsed()) {
AutoClonedSelectionRangeArray rangesToDelete(*rangeToDelete,
aLimitersAndCaretData);
AutoTrackDOMRange trackRangeToDelete(aHTMLEditor.RangeUpdaterRef(),
&rangeToDelete);
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteRangesWithTransaction(aDirectionAndAmount,
aStripWrappers, rangesToDelete);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
if (NS_WARN_IF(caretPointOrError.inspectErr() ==
NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING(
"HTMLEditor::DeleteRangesWithTransaction() failed, but ignored");
} else {
nsresult rv = caretPointOrError.inspect().SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
}
}
if (NS_WARN_IF(!rangeToDelete->IsPositioned())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
EditorDOMRange rangeToCleanUp(*rangeToDelete);
AutoTrackDOMRange trackRangeToCleanUp(aHTMLEditor.RangeUpdaterRef(),
&rangeToCleanUp);
nsresult rv = mDeleteRangesHandler->DeleteUnnecessaryNodes(
aHTMLEditor, rangeToCleanUp, aEditingHost);
if (NS_FAILED(rv)) {
NS_WARNING("AutoDeleteRangesHandler::DeleteUnnecessaryNodes() failed");
return Err(rv);
}
trackRangeToCleanUp.FlushAndStopTracking();
const auto& pointToPutCaret =
!nsIEditor::DirectionIsBackspace(aDirectionAndAmount) ||
(aHTMLEditor.TopLevelEditSubActionDataRef()
.mDidDeleteEmptyParentBlocks &&
(aHTMLEditor.GetEditAction() == EditAction::eDrop ||
aHTMLEditor.GetEditAction() == EditAction::eDeleteByDrag))
? rangeToCleanUp.StartRef()
: rangeToCleanUp.EndRef();
rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed");
return Err(rv);
}
return EditActionResult::HandledResult();
}
nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
ComputeRangeToJoinBlockElementsInSameParent(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount, nsRange& aRangeToDelete,
const Element& aEditingHost) const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!aRangeToDelete.Collapsed());
MOZ_ASSERT(mMode == Mode::JoinBlocksInSameParent);
MOZ_ASSERT(mLeftContent);
MOZ_ASSERT(mLeftContent->IsElement());
MOZ_ASSERT(aRangeToDelete.GetStartContainer()->IsInclusiveDescendantOf(
mLeftContent));
MOZ_ASSERT(mRightContent);
MOZ_ASSERT(mRightContent->IsElement());
MOZ_ASSERT(
aRangeToDelete.GetEndContainer()->IsInclusiveDescendantOf(mRightContent));
MOZ_ASSERT(mLeftContent->GetParentNode() == mRightContent->GetParentNode());
nsresult rv =
mDeleteRangesHandlerConst.ComputeRangeToDeleteRangeWithTransaction(
aHTMLEditor, aDirectionAndAmount, aRangeToDelete, aEditingHost);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::"
"ComputeRangeToDeleteRangeWithTransaction() failed");
return rv;
}
Result<EditActionResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::JoinBlockElementsInSameParent(
HTMLEditor& aHTMLEditor,
const LimitersAndCaretData& aLimitersAndCaretData,
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers, nsRange& aRangeToDelete,
SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!aRangeToDelete.Collapsed());
MOZ_ASSERT(mMode == Mode::JoinBlocksInSameParent);
MOZ_ASSERT(mLeftContent);
MOZ_ASSERT(mLeftContent->IsElement());
MOZ_ASSERT(aRangeToDelete.GetStartContainer()->IsInclusiveDescendantOf(
mLeftContent));
MOZ_ASSERT(mRightContent);
MOZ_ASSERT(mRightContent->IsElement());
MOZ_ASSERT(
aRangeToDelete.GetEndContainer()->IsInclusiveDescendantOf(mRightContent));
MOZ_ASSERT(mLeftContent->GetParentNode() == mRightContent->GetParentNode());
const bool backspaceInRightBlock =
aSelectionWasCollapsed == SelectionWasCollapsed::Yes &&
nsIEditor::DirectionIsBackspace(aDirectionAndAmount);
const OwningNonNull<nsRange> rangeToDelete(aRangeToDelete);
if (StaticPrefs::editor_white_space_normalization_blink_compatible()) {
Result<EditorDOMRange, nsresult> rangeToDeleteOrError =
WhiteSpaceVisibilityKeeper::NormalizeSurroundingWhiteSpacesToJoin(
aHTMLEditor, EditorDOMRange(*rangeToDelete));
if (MOZ_UNLIKELY(rangeToDeleteOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::NormalizeSurroundingWhiteSpacesToJoin() "
"failed");
return rangeToDeleteOrError.propagateErr();
}
nsresult rv = rangeToDeleteOrError.unwrap().SetToRange(rangeToDelete);
if (NS_FAILED(rv)) {
NS_WARNING("EditorDOMRange::SetToRange() failed");
return Err(rv);
}
}
if (!rangeToDelete->Collapsed()) {
AutoClonedSelectionRangeArray rangesToDelete(rangeToDelete,
aLimitersAndCaretData);
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteRangesWithTransaction(aDirectionAndAmount,
aStripWrappers, rangesToDelete);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteRangesWithTransaction() failed");
return caretPointOrError.propagateErr();
}
nsresult rv = caretPointOrError.inspect().SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
}
if (NS_WARN_IF(!mLeftContent->GetParentNode()) ||
NS_WARN_IF(!mRightContent->GetParentNode()) ||
NS_WARN_IF(mLeftContent->GetParentNode() !=
mRightContent->GetParentNode())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
auto startOfRightContent =
HTMLEditUtils::GetDeepestEditableStartPointOf<EditorDOMPoint>(
*mRightContent);
AutoTrackDOMPoint trackStartOfRightContent(aHTMLEditor.RangeUpdaterRef(),
&startOfRightContent);
Result<EditorDOMPoint, nsresult> atFirstChildOfTheLastRightNodeOrError =
JoinNodesDeepWithTransaction(aHTMLEditor, MOZ_KnownLive(*mLeftContent),
MOZ_KnownLive(*mRightContent));
if (MOZ_UNLIKELY(atFirstChildOfTheLastRightNodeOrError.isErr())) {
NS_WARNING("HTMLEditor::JoinNodesDeepWithTransaction() failed");
return atFirstChildOfTheLastRightNodeOrError.propagateErr();
}
MOZ_ASSERT(atFirstChildOfTheLastRightNodeOrError.inspect().IsSet());
trackStartOfRightContent.FlushAndStopTracking();
if (NS_WARN_IF(!startOfRightContent.IsSet()) ||
NS_WARN_IF(!startOfRightContent.GetContainer()->IsInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
// If we're deleting selection (not replacing with new content) and the joined
// point follows a text node, we should put caret to end of the preceding text
// node because the other browsers insert following inputs into there.
if (MayEditActionDeleteAroundCollapsedSelection(
aHTMLEditor.GetEditAction())) {
const WSRunScanner scanner(
WSRunScanner::Scan::EditableNodes, startOfRightContent,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
const WSScanResult maybePreviousText =
scanner.ScanPreviousVisibleNodeOrBlockBoundaryFrom(startOfRightContent);
if (maybePreviousText.IsContentEditable() &&
maybePreviousText.InVisibleOrCollapsibleCharacters()) {
nsresult rv = aHTMLEditor.CollapseSelectionTo(
maybePreviousText.PointAfterReachedContent<EditorRawDOMPoint>());
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed");
return Err(rv);
}
// If we prefer to use style in the previous line, we should forget
// previous styles since the caret position has all styles which we want
// to use with new content.
if (backspaceInRightBlock) {
aHTMLEditor.TopLevelEditSubActionDataRef()
.mCachedPendingStyles->Clear();
}
// And we don't want to keep extending a link at ex-end of the previous
// paragraph.
if (HTMLEditor::GetLinkElement(maybePreviousText.TextPtr())) {
aHTMLEditor.mPendingStylesToApplyToNewContent
->ClearLinkAndItsSpecifiedStyle();
}
return EditActionResult::HandledResult();
}
}
// Otherwise, we should put caret at start of the right content.
nsresult rv = aHTMLEditor.CollapseSelectionTo(
atFirstChildOfTheLastRightNodeOrError.inspect());
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed");
return Err(rv);
}
return EditActionResult::HandledResult();
}
Result<bool, nsresult>
HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
ComputeRangeToDeleteNodesEntirelyInRangeButKeepTableStructure(
const HTMLEditor& aHTMLEditor, nsRange& aRange,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed)
const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
AutoTArray<OwningNonNull<nsIContent>, 10> arrayOfTopChildren;
DOMSubtreeIterator iter;
nsresult rv = iter.Init(aRange);
if (NS_FAILED(rv)) {
NS_WARNING("DOMSubtreeIterator::Init() failed");
return Err(rv);
}
iter.AppendAllNodesToArray(arrayOfTopChildren);
return NeedsToJoinNodesAfterDeleteNodesEntirelyInRangeButKeepTableStructure(
aHTMLEditor, arrayOfTopChildren, aSelectionWasCollapsed);
}
Result<DeleteRangeResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::DeleteNodesEntirelyInRangeButKeepTableStructure(
HTMLEditor& aHTMLEditor,
const nsTArray<OwningNonNull<nsIContent>>& aArrayOfContent,
PutCaretTo aPutCaretTo) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
DeleteRangeResult deleteContentResult = DeleteRangeResult::IgnoredResult();
for (const auto& content : aArrayOfContent) {
// XXX After here, the child contents in the array may have been moved
// to somewhere or removed. We should handle it.
//
// MOZ_KnownLive because 'aArrayOfContent' is guaranteed to
// keep it alive.
AutoTrackDOMDeleteRangeResult trackDeleteContentResult(
aHTMLEditor.RangeUpdaterRef(), &deleteContentResult);
Result<DeleteRangeResult, nsresult> deleteResult =
DeleteContentButKeepTableStructure(aHTMLEditor, MOZ_KnownLive(content));
if (MOZ_UNLIKELY(deleteResult.isErr())) {
if (NS_WARN_IF(deleteResult.inspectErr() == NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING(
"AutoBlockElementsJoiner::DeleteContentButKeepTableStructure() "
"failed, but ignored");
continue;
}
trackDeleteContentResult.FlushAndStopTracking();
deleteContentResult |= deleteResult.unwrap();
}
if (deleteContentResult.Handled()) {
EditorDOMPoint pointToPutCaret =
aPutCaretTo == PutCaretTo::StartOfRange
? deleteContentResult.DeleteRangeRef().StartRef()
: deleteContentResult.DeleteRangeRef().EndRef();
deleteContentResult |= CaretPoint(std::move(pointToPutCaret));
}
return std::move(deleteContentResult);
}
bool HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
NeedsToJoinNodesAfterDeleteNodesEntirelyInRangeButKeepTableStructure(
const HTMLEditor& aHTMLEditor,
const nsTArray<OwningNonNull<nsIContent>>& aArrayOfContents,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed)
const {
switch (mMode) {
case Mode::DeletePrecedingLinesAndContentInRange:
case Mode::DeleteBRElement:
case Mode::DeletePrecedingBRElementOfBlock:
case Mode::DeletePrecedingPreformattedLineBreak:
return false;
default:
break;
}
// If original selection was collapsed, we need always to join the nodes.
// XXX Why?
if (aSelectionWasCollapsed ==
AutoDeleteRangesHandler::SelectionWasCollapsed::No) {
return true;
}
// If something visible is deleted, no need to join. Visible means
// all nodes except non-visible textnodes and breaks.
if (aArrayOfContents.IsEmpty()) {
return true;
}
for (const OwningNonNull<nsIContent>& content : aArrayOfContents) {
if (content->IsText()) {
if (HTMLEditUtils::IsInVisibleTextFrames(aHTMLEditor.GetPresContext(),
*content->AsText())) {
return false;
}
continue;
}
// XXX If it's an element node, we should check whether it has visible
// frames or not.
if (!content->IsElement() ||
HTMLEditUtils::IsEmptyNode(
*content->AsElement(),
{EmptyCheckOption::TreatSingleBRElementAsVisible,
EmptyCheckOption::TreatNonEditableContentAsInvisible})) {
continue;
}
if (!HTMLEditUtils::IsInvisibleBRElement(*content)) {
return false;
}
}
return true;
}
Result<DeleteRangeResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::DeleteTextAtStartAndEndOfRange(
HTMLEditor& aHTMLEditor, nsRange& aRange, PutCaretTo aPutCaretTo) {
if (MOZ_UNLIKELY(aRange.Collapsed())) {
return DeleteRangeResult::IgnoredResult();
}
const auto DeleteTextNode =
[&aHTMLEditor](const OwningNonNull<Text>& aTextNode)
MOZ_NEVER_INLINE_DEBUG MOZ_CAN_RUN_SCRIPT
-> Result<DeleteRangeResult, nsresult> {
const nsCOMPtr<nsINode> parentNode = aTextNode->GetParentNode();
if (NS_WARN_IF(!parentNode)) {
return Err(NS_ERROR_FAILURE);
}
const nsCOMPtr<nsIContent> nextSibling = aTextNode->GetNextSibling();
nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(aTextNode);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return Err(rv);
}
if (NS_WARN_IF(nextSibling && nextSibling->GetParentNode() != parentNode) ||
NS_WARN_IF(!parentNode->IsInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
const auto atRemovedTextNode = nextSibling
? EditorDOMPoint(nextSibling)
: EditorDOMPoint::AtEndOf(*parentNode);
return DeleteRangeResult(EditorDOMRange(atRemovedTextNode),
atRemovedTextNode);
};
EditorDOMRange range(aRange);
// If the range is in a text node, delete middle of the text or the text node
// itself.
if (range.StartRef().IsInTextNode() && range.InSameContainer()) {
const OwningNonNull<Text> textNode = *range.StartRef().ContainerAs<Text>();
if (range.StartRef().IsStartOfContainer() &&
range.EndRef().IsEndOfContainer()) {
Result<DeleteRangeResult, nsresult> deleteTextNodeResult =
DeleteTextNode(textNode);
NS_WARNING_ASSERTION(
deleteTextNodeResult.isOk(),
"DeleteTextNode() failed to delete the selected Text node");
return deleteTextNodeResult;
}
MOZ_ASSERT(range.EndRef().Offset() - range.StartRef().Offset() > 0);
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteTextWithTransaction(
textNode, range.StartRef().Offset(),
range.EndRef().Offset() - range.StartRef().Offset());
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed");
return caretPointOrError.propagateErr();
}
const EditorDOMPoint atRemovedText =
caretPointOrError.unwrap().UnwrapCaretPoint();
if (NS_WARN_IF(!atRemovedText.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
return DeleteRangeResult(EditorDOMRange(atRemovedText), atRemovedText);
}
// If the range starts in a text node and ends in a different node, delete
// the text after the start boundary.
auto deleteStartTextResultOrError =
[&]() MOZ_NEVER_INLINE_DEBUG MOZ_CAN_RUN_SCRIPT
-> Result<DeleteRangeResult, nsresult> {
if (!range.StartRef().IsInTextNode() ||
range.StartRef().IsEndOfContainer()) {
return DeleteRangeResult::IgnoredResult();
}
AutoTrackDOMRange trackRange(aHTMLEditor.RangeUpdaterRef(), &range);
const OwningNonNull<Text> textNode = *range.StartRef().ContainerAs<Text>();
if (range.StartRef().IsStartOfContainer()) {
Result<DeleteRangeResult, nsresult> deleteTextNodeResult =
DeleteTextNode(textNode);
NS_WARNING_ASSERTION(
deleteTextNodeResult.isOk(),
"DeleteTextNode() failed to delete the start Text node");
return deleteTextNodeResult;
}
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteTextWithTransaction(
textNode, range.StartRef().Offset(),
textNode->TextDataLength() - range.StartRef().Offset());
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed");
return caretPointOrError.propagateErr();
}
trackRange.FlushAndStopTracking();
const EditorDOMPoint atRemovedText =
caretPointOrError.unwrap().UnwrapCaretPoint();
if (NS_WARN_IF(!atRemovedText.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
return DeleteRangeResult(EditorDOMRange(atRemovedText), atRemovedText);
}();
if (MOZ_UNLIKELY(deleteStartTextResultOrError.isErr())) {
return deleteStartTextResultOrError.propagateErr();
}
DeleteRangeResult deleteStartTextResult =
deleteStartTextResultOrError.unwrap();
// If the range ends in a text node and starts from a different node, delete
// the text before the end boundary.
auto deleteEndTextResultOrError =
[&]() MOZ_NEVER_INLINE_DEBUG MOZ_CAN_RUN_SCRIPT
-> Result<DeleteRangeResult, nsresult> {
if (!range.EndRef().IsInTextNode() || range.EndRef().IsStartOfContainer()) {
return DeleteRangeResult::IgnoredResult();
}
AutoTrackDOMRange trackRange(aHTMLEditor.RangeUpdaterRef(), &range);
AutoTrackDOMDeleteRangeResult trackDeleteStartTextResult(
aHTMLEditor.RangeUpdaterRef(), &deleteStartTextResult);
const OwningNonNull<Text> textNode = *range.EndRef().ContainerAs<Text>();
if (range.EndRef().IsEndOfContainer()) {
Result<DeleteRangeResult, nsresult> deleteTextNodeResult =
DeleteTextNode(textNode);
NS_WARNING_ASSERTION(
deleteTextNodeResult.isOk(),
"DeleteTextNode() failed to delete the end Text node");
return deleteTextNodeResult;
}
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteTextWithTransaction(textNode, 0,
range.EndRef().Offset());
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed");
return caretPointOrError.propagateErr();
}
trackRange.FlushAndStopTracking();
const EditorDOMPoint atRemovedText =
caretPointOrError.unwrap().UnwrapCaretPoint();
if (NS_WARN_IF(!atRemovedText.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
return DeleteRangeResult(EditorDOMRange(atRemovedText), atRemovedText);
}();
if (MOZ_UNLIKELY(deleteEndTextResultOrError.isErr())) {
return deleteEndTextResultOrError.propagateErr();
}
DeleteRangeResult deleteEndTextResult = deleteEndTextResultOrError.unwrap();
if (!deleteStartTextResult.Handled() && !deleteEndTextResult.Handled()) {
deleteStartTextResult.IgnoreCaretPointSuggestion();
deleteEndTextResult.IgnoreCaretPointSuggestion();
return DeleteRangeResult::IgnoredResult();
}
EditorDOMPoint pointToPutCaret =
aPutCaretTo == PutCaretTo::EndOfRange
? (deleteEndTextResult.Handled()
? deleteEndTextResult.UnwrapCaretPoint()
: EditorDOMPoint())
: (deleteStartTextResult.Handled()
? deleteStartTextResult.UnwrapCaretPoint()
: EditorDOMPoint());
deleteStartTextResult |= deleteEndTextResult;
deleteStartTextResult.ForgetCaretPointSuggestion();
if (pointToPutCaret.IsSet()) {
deleteStartTextResult |= CaretPoint(std::move(pointToPutCaret));
}
return std::move(deleteStartTextResult);
}
// static
template <typename EditorDOMPointType>
Result<Element*, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::GetMostDistantBlockAncestorIfPointIsStartAtBlock(
const EditorDOMPointType& aPoint, const Element& aEditingHost,
const Element* aAncestorLimiter /* = nullptr */) {
MOZ_ASSERT(aPoint.IsSetAndValid());
MOZ_ASSERT(aPoint.IsInComposedDoc());
if (!aAncestorLimiter) {
aAncestorLimiter = &aEditingHost;
}
const auto ReachedCurrentBlockBoundaryWhichWeCanCross =
[&aEditingHost, aAncestorLimiter](const WSScanResult& aScanResult) {
// When the scan result is "reached current block boundary", it may not
// be so literally.
return aScanResult.ReachedCurrentBlockBoundary() &&
HTMLEditUtils::IsRemovableFromParentNode(
*aScanResult.ElementPtr()) &&
aScanResult.ElementPtr() != &aEditingHost &&
aScanResult.ElementPtr() != aAncestorLimiter &&
// Don't cross <body>, <head> and <html>
!aScanResult.ElementPtr()->IsAnyOfHTMLElements(
nsGkAtoms::body, nsGkAtoms::head, nsGkAtoms::html) &&
// Don't cross table elements
!HTMLEditUtils::IsAnyTableElement(aScanResult.ElementPtr());
};
const WSScanResult prevVisibleThing =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes, aPoint,
BlockInlineCheck::UseComputedDisplayOutsideStyle, aAncestorLimiter);
if (!ReachedCurrentBlockBoundaryWhichWeCanCross(prevVisibleThing)) {
return nullptr;
}
MOZ_ASSERT(HTMLEditUtils::IsBlockElement(
*prevVisibleThing.ElementPtr(),
BlockInlineCheck::UseComputedDisplayOutsideStyle));
for (Element* ancestorBlock = prevVisibleThing.ElementPtr(); ancestorBlock;) {
const WSScanResult prevVisibleThing =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes, EditorRawDOMPoint(ancestorBlock),
BlockInlineCheck::UseComputedDisplayOutsideStyle, aAncestorLimiter);
if (!ReachedCurrentBlockBoundaryWhichWeCanCross(prevVisibleThing)) {
return ancestorBlock;
}
MOZ_ASSERT(HTMLEditUtils::IsBlockElement(
*prevVisibleThing.ElementPtr(),
BlockInlineCheck::UseComputedDisplayOutsideStyle));
ancestorBlock = prevVisibleThing.ElementPtr();
}
return Err(NS_ERROR_FAILURE);
}
void HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
ExtendRangeToDeleteNonCollapsedRange(
const HTMLEditor& aHTMLEditor, nsRange& aRangeToDelete,
const Element& aEditingHost, ComputeRangeFor aComputeRangeFor) const {
MOZ_ASSERT_IF(aComputeRangeFor == ComputeRangeFor::GetTargetRanges,
aRangeToDelete.IsPositioned());
MOZ_ASSERT(!aRangeToDelete.Collapsed());
MOZ_ASSERT(mLeftContent);
MOZ_ASSERT(mLeftContent->IsElement());
MOZ_ASSERT(aRangeToDelete.GetStartContainer()->IsInclusiveDescendantOf(
mLeftContent));
MOZ_ASSERT(mRightContent);
MOZ_ASSERT(mRightContent->IsElement());
MOZ_ASSERT(
aRangeToDelete.GetEndContainer()->IsInclusiveDescendantOf(mRightContent));
const DebugOnly<Result<bool, nsresult>> extendRangeResult =
AutoDeleteRangesHandler::
ExtendRangeToContainAncestorInlineElementsAtStart(aRangeToDelete,
aEditingHost);
NS_WARNING_ASSERTION(extendRangeResult.value.isOk(),
"AutoDeleteRangesHandler::"
"ExtendRangeToContainAncestorInlineElementsAtStart() "
"failed, but ignored");
if (mMode != Mode::DeletePrecedingLinesAndContentInRange) {
return;
}
// If we're computing for beforeinput.getTargetRanges() and the inputType
// is not a simple deletion like replacing selected content with new
// content, the range should end at the original end boundary of the given
// range even if we're deleting only preceding lines of the right child
// block.
const bool preserveEndBoundary =
aComputeRangeFor == ComputeRangeFor::GetTargetRanges &&
!MayEditActionDeleteAroundCollapsedSelection(aHTMLEditor.GetEditAction());
// We need to delete only the preceding lines of the right block. Therefore,
// we need to shrink the range to ends before the right block if the range
// does not contain any meaningful content in the right block.
const Result<Element*, nsresult> inclusiveAncestorCurrentBlockOrError =
AutoBlockElementsJoiner::GetMostDistantBlockAncestorIfPointIsStartAtBlock(
EditorRawDOMPoint(aRangeToDelete.EndRef()), aEditingHost,
mLeftContent->AsElement());
MOZ_ASSERT(inclusiveAncestorCurrentBlockOrError.isOk());
MOZ_ASSERT_IF(inclusiveAncestorCurrentBlockOrError.inspect(),
mRightContent->IsInclusiveDescendantOf(
inclusiveAncestorCurrentBlockOrError.inspect()));
if (MOZ_UNLIKELY(!inclusiveAncestorCurrentBlockOrError.isOk() ||
!inclusiveAncestorCurrentBlockOrError.inspect())) {
return;
}
const WSScanResult prevVisibleThingOfStartBoundary =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
EditorRawDOMPoint(aRangeToDelete.StartRef()),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
// If the range starts after an invisible <br> of empty line immediately
// before the most distant inclusive ancestor of the right block like
// `<br><br>{<div>]abc`, we should delete the last empty line because
// users won't see any reaction of the builtin editor in this case.
if (prevVisibleThingOfStartBoundary.ReachedBRElement() ||
prevVisibleThingOfStartBoundary.ReachedPreformattedLineBreak()) {
const WSScanResult prevVisibleThingOfPreviousLineBreak =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
prevVisibleThingOfStartBoundary
.PointAtReachedContent<EditorRawDOMPoint>(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
const WSScanResult nextVisibleThingOfPreviousBR =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
prevVisibleThingOfStartBoundary
.PointAfterReachedContent<EditorRawDOMPoint>(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if ((prevVisibleThingOfPreviousLineBreak.ReachedBRElement() ||
prevVisibleThingOfPreviousLineBreak.ReachedPreformattedLineBreak()) &&
nextVisibleThingOfPreviousBR.ReachedOtherBlockElement() &&
nextVisibleThingOfPreviousBR.ElementPtr() ==
inclusiveAncestorCurrentBlockOrError.inspect()) {
aRangeToDelete.SetStart(prevVisibleThingOfStartBoundary
.PointAtReachedContent<EditorRawDOMPoint>()
.ToRawRangeBoundary(),
IgnoreErrors());
}
}
if (preserveEndBoundary) {
return;
}
if (aComputeRangeFor == ComputeRangeFor::GetTargetRanges) {
// When we set the end boundary to around the right block, the new end
// boundary should not after inline ancestors of the line break which won't
// be deleted.
const WSScanResult lastVisibleThingBeforeRightChildBlock =
[&]() -> WSScanResult {
EditorRawDOMPoint scanStartPoint(aRangeToDelete.StartRef());
WSScanResult lastScanResult = WSScanResult::Error();
while (true) {
WSScanResult scanResult =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes, scanStartPoint,
BlockInlineCheck::UseComputedDisplayOutsideStyle,
mLeftContent->AsElement());
if (scanResult.ReachedBlockBoundary() ||
scanResult.ReachedInlineEditingHostBoundary()) {
return lastScanResult;
}
scanStartPoint =
scanResult.PointAfterReachedContent<EditorRawDOMPoint>();
lastScanResult = scanResult;
}
}();
if (lastVisibleThingBeforeRightChildBlock.GetContent()) {
const nsIContent* commonAncestor = nsIContent::FromNode(
nsContentUtils::GetClosestCommonInclusiveAncestor(
aRangeToDelete.StartRef().GetContainer(),
lastVisibleThingBeforeRightChildBlock.GetContent()));
MOZ_ASSERT(commonAncestor);
if (commonAncestor &&
!mRightContent->IsInclusiveDescendantOf(commonAncestor)) {
IgnoredErrorResult error;
aRangeToDelete.SetEnd(
EditorRawDOMPoint::AtEndOf(*commonAncestor).ToRawRangeBoundary(),
error);
NS_WARNING_ASSERTION(!error.Failed(),
"nsRange::SetEnd() failed, but ignored");
return;
}
}
}
IgnoredErrorResult error;
aRangeToDelete.SetEnd(
EditorRawDOMPoint(inclusiveAncestorCurrentBlockOrError.inspect())
.ToRawRangeBoundary(),
error);
NS_WARNING_ASSERTION(!error.Failed(),
"nsRange::SetEnd() failed, but ignored");
}
nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
ComputeRangeToDeleteNonCollapsedRange(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount, nsRange& aRangeToDelete,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost) const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!aRangeToDelete.Collapsed());
MOZ_ASSERT(mLeftContent);
MOZ_ASSERT(mLeftContent->IsElement());
MOZ_ASSERT(aRangeToDelete.GetStartContainer()->IsInclusiveDescendantOf(
mLeftContent));
MOZ_ASSERT(mRightContent);
MOZ_ASSERT(mRightContent->IsElement());
MOZ_ASSERT(
aRangeToDelete.GetEndContainer()->IsInclusiveDescendantOf(mRightContent));
ExtendRangeToDeleteNonCollapsedRange(aHTMLEditor, aRangeToDelete,
aEditingHost,
ComputeRangeFor::GetTargetRanges);
Result<bool, nsresult> result =
ComputeRangeToDeleteNodesEntirelyInRangeButKeepTableStructure(
aHTMLEditor, aRangeToDelete, aSelectionWasCollapsed);
if (result.isErr()) {
NS_WARNING(
"AutoBlockElementsJoiner::"
"ComputeRangeToDeleteNodesEntirelyInRangeButKeepTableStructure() "
"failed");
return result.unwrapErr();
}
if (!result.unwrap()) {
return NS_OK;
}
AutoInclusiveAncestorBlockElementsJoiner joiner(*mLeftContent,
*mRightContent);
Result<bool, nsresult> canJoinThem =
joiner.Prepare(aHTMLEditor, aEditingHost);
if (canJoinThem.isErr()) {
NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Prepare() failed");
return canJoinThem.unwrapErr();
}
if (!canJoinThem.unwrap()) {
return NS_SUCCESS_DOM_NO_OPERATION;
}
if (!joiner.CanJoinBlocks()) {
return NS_OK;
}
nsresult rv = joiner.ComputeRangeToDelete(aHTMLEditor, EditorDOMPoint(),
aRangeToDelete);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoInclusiveAncestorBlockElementsJoiner::ComputeRangeToDelete() "
"failed");
// FIXME: If we'll delete unnecessary following <br>, we need to include it
// into aRangesToDelete.
return rv;
}
Result<EditActionResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::HandleDeleteNonCollapsedRange(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers, nsRange& aRangeToDelete,
AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!aRangeToDelete.Collapsed());
MOZ_ASSERT(mDeleteRangesHandler);
const bool isDeletingLineBreak =
mMode == Mode::DeleteBRElement ||
mMode == Mode::DeletePrecedingBRElementOfBlock ||
mMode == Mode::DeletePrecedingPreformattedLineBreak;
if (!isDeletingLineBreak) {
MOZ_ASSERT(aRangeToDelete.GetStartContainer()->IsInclusiveDescendantOf(
mLeftContent));
MOZ_ASSERT(aRangeToDelete.GetEndContainer()->IsInclusiveDescendantOf(
mRightContent));
ExtendRangeToDeleteNonCollapsedRange(aHTMLEditor, aRangeToDelete,
aEditingHost,
ComputeRangeFor::ToDeleteTheRange);
}
const bool backspaceInRightBlock =
aSelectionWasCollapsed == SelectionWasCollapsed::Yes &&
nsIEditor::DirectionIsBackspace(aDirectionAndAmount);
AutoTArray<OwningNonNull<nsIContent>, 10> arrayOfTopChildren;
{
DOMSubtreeIterator iter;
nsresult rv = iter.Init(aRangeToDelete);
if (NS_FAILED(rv)) {
NS_WARNING("DOMSubtreeIterator::Init() failed");
return Err(rv);
}
iter.AppendAllNodesToArray(arrayOfTopChildren);
}
const bool needsToJoinLater =
NeedsToJoinNodesAfterDeleteNodesEntirelyInRangeButKeepTableStructure(
aHTMLEditor, arrayOfTopChildren, aSelectionWasCollapsed);
const bool joinInclusiveAncestorBlockElements =
!isDeletingLineBreak && needsToJoinLater;
const bool maybeDeleteOnlyFollowingContentOfFollowingBlockBoundary =
!isDeletingLineBreak &&
mMode != Mode::DeletePrecedingLinesAndContentInRange &&
HTMLEditUtils::PointIsImmediatelyBeforeCurrentBlockBoundary(
EditorRawDOMPoint(aRangeToDelete.StartRef()),
HTMLEditUtils::IgnoreInvisibleLineBreak::Yes);
const PutCaretTo putCaretTo = [&]() {
// When we delete only preceding lines of the right child block, we should
// put caret into start of the right block.
if (mMode == Mode::DeletePrecedingLinesAndContentInRange) {
return PutCaretTo::EndOfRange;
}
// If we're joining blocks: if deleting forward the selection should be
// collapsed to the end of the selection, if deleting backward the selection
// should be collapsed to the beginning of the selection.
if (joinInclusiveAncestorBlockElements) {
return nsIEditor::DirectionIsDelete(aDirectionAndAmount)
? PutCaretTo::EndOfRange
: PutCaretTo::StartOfRange;
}
// But if we're not joining then the selection should collapse to the
// beginning of the selection if we're deleting forward, because the end of
// the selection will still be in the next block. And same thing for
// deleting backwards (selection should collapse to the end, because the
// beginning will still be in the first block). See Bug 507936.
return nsIEditor::DirectionIsDelete(aDirectionAndAmount)
? PutCaretTo::StartOfRange
: PutCaretTo::EndOfRange;
}();
auto deleteContentResultOrError =
[&]() MOZ_NEVER_INLINE_DEBUG MOZ_CAN_RUN_SCRIPT
-> Result<DeleteRangeResult, nsresult> {
OwningNonNull<nsRange> rangeToDelete(aRangeToDelete);
AutoTrackDOMRange trackRangeToDelete(aHTMLEditor.RangeUpdaterRef(),
&rangeToDelete);
// First, delete nodes which are entirely selected except table structure
// elements like <td>, <th>, <caption>.
Result<DeleteRangeResult, nsresult> deleteResultOrError =
DeleteNodesEntirelyInRangeButKeepTableStructure(
aHTMLEditor, arrayOfTopChildren, putCaretTo);
if (MOZ_UNLIKELY(deleteResultOrError.isErr())) {
NS_WARNING(
"AutoBlockElementsJoiner::"
"DeleteNodesEntirelyInRangeButKeepTableStructure() failed");
return deleteResultOrError.propagateErr();
}
DeleteRangeResult deleteResult = deleteResultOrError.unwrap();
// We'll compute caret position below, so, we don't need the caret point
// suggestion of DeleteNodesEntirelyInRangeButKeepTableStructure().
deleteResult.ForgetCaretPointSuggestion();
// Check endpoints for possible text deletion. We can assume that if
// text node is found, we can delete to end or to beginning as
// appropriate, since the case where both sel endpoints in same text
// node was already handled (we wouldn't be here)
AutoTrackDOMDeleteRangeResult trackDeleteResult(
aHTMLEditor.RangeUpdaterRef(), &deleteResult);
Result<DeleteRangeResult, nsresult> deleteSurroundingTextResultOrError =
DeleteTextAtStartAndEndOfRange(aHTMLEditor, rangeToDelete, putCaretTo);
if (MOZ_UNLIKELY(deleteSurroundingTextResultOrError.isErr())) {
NS_WARNING(
"AutoBlockElementsJoiner::DeleteTextAtStartAndEndOfRange() failed");
return deleteSurroundingTextResultOrError.propagateErr();
}
trackDeleteResult.FlushAndStopTracking();
trackRangeToDelete.FlushAndStopTracking();
DeleteRangeResult deleteSurroundingTextResult =
deleteSurroundingTextResultOrError.unwrap();
// We'll compute caret position below, so, we don't need the caret point
// suggestion of DeleteTextAtStartAndEndOfRange().
deleteSurroundingTextResult.ForgetCaretPointSuggestion();
// Merge the deleted range.
deleteResult |= deleteSurroundingTextResult;
if (mRightContent && mMode == Mode::DeletePrecedingLinesAndContentInRange) {
if (NS_WARN_IF(!mRightContent->IsInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
auto pointToPutCaret =
HTMLEditUtils::GetDeepestEditableStartPointOf<EditorDOMPoint>(
*mRightContent);
MOZ_ASSERT(pointToPutCaret.IsSet());
deleteResult |= CaretPoint(std::move(pointToPutCaret));
}
return std::move(deleteResult);
}();
if (MOZ_UNLIKELY(deleteContentResultOrError.isErr())) {
return deleteContentResultOrError.propagateErr();
}
DeleteRangeResult deleteContentResult = deleteContentResultOrError.unwrap();
// HandleDeleteLineBreak() should handle the new caret position by itself.
if (isDeletingLineBreak) {
MOZ_ASSERT(!joinInclusiveAncestorBlockElements);
deleteContentResult.IgnoreCaretPointSuggestion();
return EditActionResult::HandledResult();
}
auto moveFirstLineResultOrError =
[&]() MOZ_NEVER_INLINE_DEBUG MOZ_CAN_RUN_SCRIPT
-> Result<DeleteRangeResult, nsresult> {
if (!joinInclusiveAncestorBlockElements) {
return DeleteRangeResult::IgnoredResult();
}
MOZ_ASSERT(mLeftContent);
MOZ_ASSERT(mLeftContent->IsElement());
MOZ_ASSERT(mRightContent);
MOZ_ASSERT(mRightContent->IsElement());
if (!joinInclusiveAncestorBlockElements) {
return DeleteRangeResult::IgnoredResult();
}
// Finally, join elements containing either mLeftContent or mRightContent.
// XXX This may join only inline elements despite its name.
AutoInclusiveAncestorBlockElementsJoiner joiner(*mLeftContent,
*mRightContent);
Result<bool, nsresult> canJoinThem =
joiner.Prepare(aHTMLEditor, aEditingHost);
if (canJoinThem.isErr()) {
NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Prepare() failed");
return canJoinThem.propagateErr();
}
if (!canJoinThem.inspect() || !joiner.CanJoinBlocks()) {
return DeleteRangeResult::IgnoredResult();
}
OwningNonNull<nsRange> rangeToDelete(aRangeToDelete);
AutoTrackDOMRange trackRangeToDelete(aHTMLEditor.RangeUpdaterRef(),
&rangeToDelete);
AutoTrackDOMDeleteRangeResult trackDeleteContentResult(
aHTMLEditor.RangeUpdaterRef(), &deleteContentResult);
Result<DeleteRangeResult, nsresult> moveFirstLineResultOrError =
joiner.Run(aHTMLEditor, aEditingHost);
if (MOZ_UNLIKELY(moveFirstLineResultOrError.isErr())) {
NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Run() failed");
return moveFirstLineResultOrError.propagateErr();
}
trackDeleteContentResult.FlushAndStopTracking();
trackRangeToDelete.FlushAndStopTracking();
DeleteRangeResult moveFirstLineResult = moveFirstLineResultOrError.unwrap();
#ifdef DEBUG
if (joiner.ShouldDeleteLeafContentInstead()) {
NS_ASSERTION(moveFirstLineResult.Ignored(),
"Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` "
"returning ignored, but returned not ignored");
} else {
NS_ASSERTION(!moveFirstLineResult.Ignored(),
"Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` "
"returning handled, but returned ignored");
}
#endif // #ifdef DEBUG
return std::move(moveFirstLineResult);
}();
if (MOZ_UNLIKELY(moveFirstLineResultOrError.isErr())) {
deleteContentResult.IgnoreCaretPointSuggestion();
return moveFirstLineResultOrError.propagateErr();
}
DeleteRangeResult moveFirstLineResult = moveFirstLineResultOrError.unwrap();
auto pointToPutCaret = [&]() MOZ_NEVER_INLINE_DEBUG -> EditorDOMPoint {
if (moveFirstLineResult.HasCaretPointSuggestion()) {
MOZ_ASSERT(moveFirstLineResult.Handled());
if (MayEditActionDeleteAroundCollapsedSelection(
aHTMLEditor.GetEditAction())) {
deleteContentResult.IgnoreCaretPointSuggestion();
// If we're deleting selection (not replacing with new content) and
// AutoInclusiveAncestorBlockElementsJoiner computed new caret position,
// we should use it.
return moveFirstLineResult.UnwrapCaretPoint();
}
moveFirstLineResult.IgnoreCaretPointSuggestion();
}
if (deleteContentResult.HasCaretPointSuggestion()) {
return deleteContentResult.UnwrapCaretPoint();
}
return EditorDOMPoint(putCaretTo == PutCaretTo::StartOfRange
? aRangeToDelete.StartRef()
: aRangeToDelete.EndRef());
}();
MOZ_ASSERT(pointToPutCaret.IsSetAndValidInComposedDoc());
{
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv = mDeleteRangesHandler->DeleteUnnecessaryNodes(
aHTMLEditor, EditorDOMRange(aRangeToDelete), aEditingHost);
if (NS_FAILED(rv)) {
NS_WARNING("AutoDeleteRangesHandler::DeleteUnnecessaryNodes() failed");
return Err(rv);
}
trackPointToPutCaret.FlushAndStopTracking();
if (NS_WARN_IF(!pointToPutCaret.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
if (aHTMLEditor.IsMailEditor() &&
MOZ_LIKELY(pointToPutCaret.IsInContentNode())) {
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv = aHTMLEditor.DeleteMostAncestorMailCiteElementIfEmpty(
MOZ_KnownLive(*pointToPutCaret.ContainerAs<nsIContent>()));
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::DeleteMostAncestorMailCiteElementIfEmpty() failed");
return Err(rv);
}
trackPointToPutCaret.FlushAndStopTracking();
if (NS_WARN_IF(!pointToPutCaret.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
const auto EnsureNoFollowingUnnecessaryLineBreak =
[&](const EditorDOMPoint& aPoint)
MOZ_NEVER_INLINE_DEBUG MOZ_CAN_RUN_SCRIPT {
if (!aPoint.IsInContentNode()) {
return NS_OK;
}
AutoTrackDOMDeleteRangeResult trackDeleteContentResult(
aHTMLEditor.RangeUpdaterRef(), &deleteContentResult);
AutoTrackDOMDeleteRangeResult trackMoveFirstLineResult(
aHTMLEditor.RangeUpdaterRef(), &moveFirstLineResult);
AutoTrackDOMPoint trackPointToPutCaret(
aHTMLEditor.RangeUpdaterRef(), &pointToPutCaret);
nsresult rv =
aHTMLEditor.EnsureNoFollowingUnnecessaryLineBreak(aPoint);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"HTMLEditor::EnsureNoFollowingUnnecessaryLineBreak() failed");
return rv;
};
const auto InsertPaddingBRElementIfNeeded =
[&](const EditorDOMPoint& aPoint)
MOZ_NEVER_INLINE_DEBUG MOZ_CAN_RUN_SCRIPT
-> Result<CaretPoint, nsresult> {
if (!aPoint.IsInContentNode()) {
return CaretPoint(EditorDOMPoint());
}
const bool insertingAtCaretPoint = aPoint == pointToPutCaret;
if (insertingAtCaretPoint && aHTMLEditor.GetTopLevelEditSubAction() !=
EditSubAction::eDeleteSelectedContent) {
return CaretPoint(EditorDOMPoint());
}
if (!insertingAtCaretPoint &&
mMode == Mode::DeletePrecedingLinesAndContentInRange) {
return CaretPoint(EditorDOMPoint());
}
AutoTrackDOMDeleteRangeResult trackDeleteContentResult(
aHTMLEditor.RangeUpdaterRef(), &deleteContentResult);
AutoTrackDOMDeleteRangeResult trackMoveFirstLineResult(
aHTMLEditor.RangeUpdaterRef(), &moveFirstLineResult);
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
Result<CreateLineBreakResult, nsresult> insertPaddingBRElementOrError =
aHTMLEditor.InsertPaddingBRElementIfNeeded(
aPoint,
aEditingHost.IsContentEditablePlainTextOnly() ? nsIEditor::eNoStrip
: nsIEditor::eStrip,
aEditingHost);
if (MOZ_UNLIKELY(insertPaddingBRElementOrError.isErr())) {
NS_WARNING("HTMLEditor::InsertPaddingBRElementIfNeeded() failed");
return insertPaddingBRElementOrError.propagateErr();
}
CreateLineBreakResult insertPaddingBRElement =
insertPaddingBRElementOrError.unwrap();
if (!insertPaddingBRElement.Handled() || !insertingAtCaretPoint) {
insertPaddingBRElement.IgnoreCaretPointSuggestion();
return CaretPoint(EditorDOMPoint());
}
return CaretPoint(insertPaddingBRElement.UnwrapCaretPoint());
};
// If we moved content from the right element to the left element, we need to
// maintain padding line break at end of moved content.
if (moveFirstLineResult.Handled() &&
moveFirstLineResult.DeleteRangeRef().IsPositioned()) {
nsresult rv = EnsureNoFollowingUnnecessaryLineBreak(
moveFirstLineResult.DeleteRangeRef().EndRef());
if (NS_FAILED(rv)) {
NS_WARNING("EnsureNoFollowingUnnecessaryLineBreak() failed");
return Err(rv);
}
// If we moved a child block of the first line (although this is
// logically wrong...), we should not put a <br> after that.
const bool movedLineEndsWithBlockBoundary = [&]() {
Element* const commonAncestor =
Element::FromNodeOrNull(moveFirstLineResult.DeleteRangeRef()
.GetClosestCommonInclusiveAncestor());
nsIContent* const previousVisibleLeafOrChildBlock =
HTMLEditUtils::GetPreviousNonEmptyLeafContentOrPreviousBlockElement(
moveFirstLineResult.DeleteRangeRef().EndRef(),
{LeafNodeType::LeafNodeOrChildBlock},
BlockInlineCheck::UseComputedDisplayOutsideStyle, commonAncestor);
if (!previousVisibleLeafOrChildBlock) {
return false;
}
return HTMLEditUtils::IsBlockElement(
*previousVisibleLeafOrChildBlock,
BlockInlineCheck::UseComputedDisplayOutsideStyle) &&
moveFirstLineResult.DeleteRangeRef().StartRef().EqualsOrIsBefore(
EditorRawDOMPoint::After(*previousVisibleLeafOrChildBlock));
}();
if (MOZ_LIKELY(!movedLineEndsWithBlockBoundary)) {
Result<CaretPoint, nsresult> caretPointOrError =
InsertPaddingBRElementIfNeeded(
moveFirstLineResult.DeleteRangeRef().EndRef());
if (NS_WARN_IF(caretPointOrError.isErr())) {
return caretPointOrError.propagateErr();
}
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
}
}
// If we only deleted content in the range, we need to maintain padding line
// breaks at both deleted range boundaries.
else if (deleteContentResult.DeleteRangeRef().IsPositioned()) {
if (!deleteContentResult.DeleteRangeRef().Collapsed()) {
nsresult rv;
if (NS_WARN_IF(
NS_FAILED(rv = EnsureNoFollowingUnnecessaryLineBreak(
deleteContentResult.DeleteRangeRef().EndRef())))) {
return Err(rv);
}
// If we deleted blocks following current block, we should not insert
// padding line break after current block when we're handling Backspace.
const bool isFollowingBlockDeletedByBackspace =
[&]() MOZ_NEVER_INLINE_DEBUG {
if (putCaretTo == PutCaretTo::EndOfRange) {
return false;
}
if (!HTMLEditUtils::RangeIsAcrossStartBlockBoundary(
deleteContentResult.DeleteRangeRef())) {
return false;
}
WSScanResult nextThing =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
deleteContentResult.DeleteRangeRef().EndRef(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
return nextThing.ReachedBRElement() ||
nextThing.ReachedPreformattedLineBreak() ||
nextThing.ReachedHRElement() ||
nextThing.ReachedBlockBoundary();
}();
if (!isFollowingBlockDeletedByBackspace) {
Result<CaretPoint, nsresult> caretPointOrError =
InsertPaddingBRElementIfNeeded(
deleteContentResult.DeleteRangeRef().EndRef());
if (NS_WARN_IF(caretPointOrError.isErr())) {
return caretPointOrError.propagateErr();
}
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
}
}
// If we deleted content only after current block, we don't need to
// maintain line breaks at start of the deleted range because nothing has
// been changed from the caret point of view.
if (!maybeDeleteOnlyFollowingContentOfFollowingBlockBoundary) {
nsresult rv;
if (NS_WARN_IF(NS_FAILED(
rv = EnsureNoFollowingUnnecessaryLineBreak(
deleteContentResult.DeleteRangeRef().StartRef())))) {
return Err(rv);
}
Result<CaretPoint, nsresult> caretPointOrError =
InsertPaddingBRElementIfNeeded(
deleteContentResult.DeleteRangeRef().StartRef());
if (NS_WARN_IF(caretPointOrError.isErr())) {
return caretPointOrError.propagateErr();
}
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
}
}
nsresult rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed");
return Err(rv);
}
if (mMode == Mode::DeletePrecedingLinesAndContentInRange ||
moveFirstLineResult.Handled()) {
// If we prefer to use style in the previous line, we should forget previous
// styles since the caret position has all styles which we want to use with
// new content.
if (backspaceInRightBlock) {
aHTMLEditor.TopLevelEditSubActionDataRef().mCachedPendingStyles->Clear();
}
// And we don't want to keep extending a link at ex-end of the previous
// paragraph.
if (HTMLEditor::GetLinkElement(pointToPutCaret.GetContainer())) {
aHTMLEditor.mPendingStylesToApplyToNewContent
->ClearLinkAndItsSpecifiedStyle();
}
}
return EditActionResult::HandledResult();
}
nsresult HTMLEditor::AutoDeleteRangesHandler::DeleteUnnecessaryNodes(
HTMLEditor& aHTMLEditor, const EditorDOMRange& aRange,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsTopLevelEditSubActionDataAvailable());
MOZ_ASSERT(EditorUtils::IsEditableContent(
*aRange.StartRef().ContainerAs<nsIContent>(), EditorType::HTML));
MOZ_ASSERT(EditorUtils::IsEditableContent(
*aRange.EndRef().ContainerAs<nsIContent>(), EditorType::HTML));
EditorDOMRange range(aRange);
// If we're handling DnD, this is called to delete dragging item from the
// tree. In this case, we should remove parent blocks if it becomes empty.
if (aHTMLEditor.GetEditAction() == EditAction::eDrop ||
aHTMLEditor.GetEditAction() == EditAction::eDeleteByDrag) {
MOZ_ASSERT(range.Collapsed() ||
(range.StartRef().GetContainer()->GetNextSibling() ==
range.EndRef().GetContainer() &&
range.StartRef().IsEndOfContainer() &&
range.EndRef().IsStartOfContainer()));
AutoTrackDOMRange trackRange(aHTMLEditor.RangeUpdaterRef(), &range);
nsresult rv =
DeleteParentBlocksWithTransactionIfEmpty(aHTMLEditor, range.StartRef());
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::DeleteParentBlocksWithTransactionIfEmpty() failed");
return rv;
}
aHTMLEditor.TopLevelEditSubActionDataRef().mDidDeleteEmptyParentBlocks =
rv == NS_OK;
// If we removed parent blocks, Selection should be collapsed at where
// the most ancestor empty block has been.
if (aHTMLEditor.TopLevelEditSubActionDataRef()
.mDidDeleteEmptyParentBlocks) {
return NS_OK;
}
}
if (NS_WARN_IF(!range.IsInContentNodes()) ||
NS_WARN_IF(!EditorUtils::IsEditableContent(
*range.StartRef().ContainerAs<nsIContent>(), EditorType::HTML)) ||
NS_WARN_IF(!EditorUtils::IsEditableContent(
*range.EndRef().ContainerAs<nsIContent>(), EditorType::HTML))) {
return NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE;
}
// We might have left only collapsed white-space in the start/end nodes
{
AutoTrackDOMRange trackRange(aHTMLEditor.RangeUpdaterRef(), &range);
OwningNonNull<nsIContent> startContainer =
*range.StartRef().ContainerAs<nsIContent>();
OwningNonNull<nsIContent> endContainer =
*range.EndRef().ContainerAs<nsIContent>();
nsresult rv =
DeleteNodeIfInvisibleAndEditableTextNode(aHTMLEditor, startContainer);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::DeleteNodeIfInvisibleAndEditableTextNode() "
"failed to remove start node, but ignored");
// If we've not handled the selection end container, and it's still
// editable, let's handle it.
if (!range.InSameContainer() &&
EditorUtils::IsEditableContent(
*range.EndRef().ContainerAs<nsIContent>(), EditorType::HTML)) {
rv = DeleteNodeIfInvisibleAndEditableTextNode(aHTMLEditor, endContainer);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::DeleteNodeIfInvisibleAndEditableTextNode() "
"failed to remove end node, but ignored");
}
}
if (NS_WARN_IF(!range.IsPositioned())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
if (MOZ_LIKELY(range.EndRef().IsInContentNode())) {
AutoTrackDOMRange trackRange(aHTMLEditor.RangeUpdaterRef(), &range);
nsresult rv =
aHTMLEditor.EnsureNoFollowingUnnecessaryLineBreak(range.EndRef());
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::EnsureNoFollowingUnnecessaryLineBreak() failed");
return Err(rv);
}
}
if (NS_WARN_IF(!range.IsPositioned())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
return NS_OK;
}
nsresult
HTMLEditor::AutoDeleteRangesHandler::DeleteNodeIfInvisibleAndEditableTextNode(
HTMLEditor& aHTMLEditor, nsIContent& aContent) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
Text* text = aContent.GetAsText();
if (!text) {
return NS_OK;
}
if (!HTMLEditUtils::IsRemovableFromParentNode(*text) ||
HTMLEditUtils::IsVisibleTextNode(*text)) {
return NS_OK;
}
nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(aContent);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DeleteNodeWithTransaction() failed");
return rv;
}
nsresult
HTMLEditor::AutoDeleteRangesHandler::DeleteParentBlocksWithTransactionIfEmpty(
HTMLEditor& aHTMLEditor, const EditorDOMPoint& aPoint) {
MOZ_ASSERT(aPoint.IsSet());
MOZ_ASSERT(aHTMLEditor.mPlaceholderBatch);
// First, check there is visible contents before the point in current block.
RefPtr<Element> editingHost = aHTMLEditor.ComputeEditingHost();
const WSRunScanner wsScannerForPoint(
WSRunScanner::Scan::EditableNodes, aPoint,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (!wsScannerForPoint.StartsFromCurrentBlockBoundary() &&
!wsScannerForPoint.StartsFromInlineEditingHostBoundary()) {
// If there is visible node before the point, we shouldn't remove the
// parent block.
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
if (NS_WARN_IF(!wsScannerForPoint.GetStartReasonContent()) ||
NS_WARN_IF(!wsScannerForPoint.GetStartReasonContent()->GetParentNode())) {
return NS_ERROR_FAILURE;
}
if (editingHost == wsScannerForPoint.GetStartReasonContent()) {
// If we reach editing host, there is no parent blocks which can be removed.
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
if (HTMLEditUtils::IsTableCellOrCaption(
*wsScannerForPoint.GetStartReasonContent())) {
// If we reach a <td>, <th> or <caption>, we shouldn't remove it even
// becomes empty because removing such element changes the structure of
// the <table>.
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
// Next, check there is visible contents after the point in current block.
const WSScanResult forwardScanFromPointResult =
wsScannerForPoint.ScanInclusiveNextVisibleNodeOrBlockBoundaryFrom(aPoint);
if (forwardScanFromPointResult.Failed()) {
NS_WARNING("WSRunScanner::ScanNextVisibleNodeOrBlockBoundaryFrom() failed");
return NS_ERROR_FAILURE;
}
if (forwardScanFromPointResult.ReachedBRElement()) {
// XXX In my understanding, this is odd. The end reason may not be
// same as the reached <br> element because the equality is
// guaranteed only when ReachedCurrentBlockBoundary() returns true.
// However, looks like that this code assumes that
// GetEndReasonContent() returns the (or a) <br> element.
NS_ASSERTION(wsScannerForPoint.GetEndReasonContent() ==
forwardScanFromPointResult.BRElementPtr(),
"End reason is not the reached <br> element");
// If the <br> element is visible, we shouldn't remove the parent block.
if (HTMLEditUtils::IsVisibleBRElement(
*wsScannerForPoint.GetEndReasonContent())) {
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
if (wsScannerForPoint.GetEndReasonContent()->GetNextSibling()) {
const WSScanResult scanResult =
WSRunScanner::ScanInclusiveNextVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes,
EditorRawDOMPoint::After(
*wsScannerForPoint.GetEndReasonContent()),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (scanResult.Failed()) {
NS_WARNING("WSRunScanner::ScanNextVisibleNodeOrBlockBoundary() failed");
return NS_ERROR_FAILURE;
}
if (!scanResult.ReachedCurrentBlockBoundary() &&
!scanResult.ReachedInlineEditingHostBoundary()) {
// If we couldn't reach the block's end after the invisible <br>,
// that means that there is visible content.
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
}
} else if (!forwardScanFromPointResult.ReachedCurrentBlockBoundary() &&
!forwardScanFromPointResult.ReachedInlineEditingHostBoundary()) {
// If we couldn't reach the block's end, the block has visible content.
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
// Delete the parent block.
EditorDOMPoint nextPoint(
wsScannerForPoint.GetStartReasonContent()->GetParentNode(), 0);
nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(
MOZ_KnownLive(*wsScannerForPoint.GetStartReasonContent()));
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return rv;
}
// If we reach editing host, return NS_OK.
if (nextPoint.GetContainer() == editingHost) {
return NS_OK;
}
// Otherwise, we need to check whether we're still in empty block or not.
// If we have mutation event listeners, the next point is now outside of
// editing host or editing hos has been changed.
if (aHTMLEditor.MayHaveMutationEventListeners(
NS_EVENT_BITS_MUTATION_NODEREMOVED |
NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT |
NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED)) {
Element* newEditingHost = aHTMLEditor.ComputeEditingHost();
if (NS_WARN_IF(!newEditingHost) ||
NS_WARN_IF(newEditingHost != editingHost)) {
return NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE;
}
if (NS_WARN_IF(!EditorUtils::IsDescendantOf(*nextPoint.GetContainer(),
*newEditingHost))) {
return NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE;
}
}
rv = DeleteParentBlocksWithTransactionIfEmpty(aHTMLEditor, nextPoint);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoDeleteRangesHandler::"
"DeleteParentBlocksWithTransactionIfEmpty() failed");
return rv;
}
nsresult
HTMLEditor::AutoDeleteRangesHandler::ComputeRangeToDeleteRangeWithTransaction(
const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
nsRange& aRangeToDelete, const Element& aEditingHost) const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
const EditorBase::HowToHandleCollapsedRange howToHandleCollapsedRange =
EditorBase::HowToHandleCollapsedRangeFor(aDirectionAndAmount);
if (MOZ_UNLIKELY(aRangeToDelete.Collapsed() &&
howToHandleCollapsedRange ==
EditorBase::HowToHandleCollapsedRange::Ignore)) {
return NS_SUCCESS_DOM_NO_OPERATION;
}
// If it's not collapsed, `DeleteRangeTransaction::Create()` will be called
// with it and `DeleteRangeTransaction` won't modify the range.
if (!aRangeToDelete.Collapsed()) {
return NS_OK;
}
const auto ExtendRangeToSelectCharacterForward =
[](nsRange& aRange, const EditorRawDOMPointInText& aCaretPoint) -> void {
const nsTextFragment& textFragment =
aCaretPoint.ContainerAs<Text>()->TextFragment();
if (!textFragment.GetLength()) {
return;
}
if (textFragment.IsHighSurrogateFollowedByLowSurrogateAt(
aCaretPoint.Offset())) {
DebugOnly<nsresult> rvIgnored = aRange.SetStartAndEnd(
aCaretPoint.ContainerAs<Text>(), aCaretPoint.Offset(),
aCaretPoint.ContainerAs<Text>(), aCaretPoint.Offset() + 2);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsRange::SetStartAndEnd() failed");
return;
}
DebugOnly<nsresult> rvIgnored = aRange.SetStartAndEnd(
aCaretPoint.ContainerAs<Text>(), aCaretPoint.Offset(),
aCaretPoint.ContainerAs<Text>(), aCaretPoint.Offset() + 1);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsRange::SetStartAndEnd() failed");
};
const auto ExtendRangeToSelectCharacterBackward =
[](nsRange& aRange, const EditorRawDOMPointInText& aCaretPoint) -> void {
if (aCaretPoint.IsStartOfContainer()) {
return;
}
const nsTextFragment& textFragment =
aCaretPoint.ContainerAs<Text>()->TextFragment();
if (!textFragment.GetLength()) {
return;
}
if (textFragment.IsLowSurrogateFollowingHighSurrogateAt(
aCaretPoint.Offset() - 1)) {
DebugOnly<nsresult> rvIgnored = aRange.SetStartAndEnd(
aCaretPoint.ContainerAs<Text>(), aCaretPoint.Offset() - 2,
aCaretPoint.ContainerAs<Text>(), aCaretPoint.Offset());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsRange::SetStartAndEnd() failed");
return;
}
DebugOnly<nsresult> rvIgnored = aRange.SetStartAndEnd(
aCaretPoint.ContainerAs<Text>(), aCaretPoint.Offset() - 1,
aCaretPoint.ContainerAs<Text>(), aCaretPoint.Offset());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsRange::SetStartAndEnd() failed");
};
// In the other cases, `EditorBase::CreateTransactionForCollapsedRange()`
// will handle the collapsed range.
EditorRawDOMPoint caretPoint(aRangeToDelete.StartRef());
if (howToHandleCollapsedRange ==
EditorBase::HowToHandleCollapsedRange::ExtendBackward &&
caretPoint.IsStartOfContainer()) {
nsIContent* previousEditableContent = HTMLEditUtils::GetPreviousContent(
*caretPoint.GetContainer(), {WalkTreeOption::IgnoreNonEditableNode},
BlockInlineCheck::Unused, &aEditingHost);
if (!previousEditableContent) {
return NS_OK;
}
if (!previousEditableContent->IsText()) {
IgnoredErrorResult ignoredError;
aRangeToDelete.SelectNode(*previousEditableContent, ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"nsRange::SelectNode() failed");
return NS_OK;
}
ExtendRangeToSelectCharacterBackward(
aRangeToDelete,
EditorRawDOMPointInText::AtEndOf(*previousEditableContent->AsText()));
return NS_OK;
}
if (howToHandleCollapsedRange ==
EditorBase::HowToHandleCollapsedRange::ExtendForward &&
caretPoint.IsEndOfContainer()) {
nsIContent* nextEditableContent = HTMLEditUtils::GetNextContent(
*caretPoint.GetContainer(), {WalkTreeOption::IgnoreNonEditableNode},
BlockInlineCheck::Unused, &aEditingHost);
if (!nextEditableContent) {
return NS_OK;
}
if (!nextEditableContent->IsText()) {
IgnoredErrorResult ignoredError;
aRangeToDelete.SelectNode(*nextEditableContent, ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"nsRange::SelectNode() failed");
return NS_OK;
}
ExtendRangeToSelectCharacterForward(
aRangeToDelete,
EditorRawDOMPointInText(nextEditableContent->AsText(), 0));
return NS_OK;
}
if (caretPoint.IsInTextNode()) {
if (howToHandleCollapsedRange ==
EditorBase::HowToHandleCollapsedRange::ExtendBackward) {
ExtendRangeToSelectCharacterBackward(
aRangeToDelete,
EditorRawDOMPointInText(caretPoint.ContainerAs<Text>(),
caretPoint.Offset()));
return NS_OK;
}
ExtendRangeToSelectCharacterForward(
aRangeToDelete, EditorRawDOMPointInText(caretPoint.ContainerAs<Text>(),
caretPoint.Offset()));
return NS_OK;
}
nsIContent* editableContent =
howToHandleCollapsedRange ==
EditorBase::HowToHandleCollapsedRange::ExtendBackward
? HTMLEditUtils::GetPreviousContent(
caretPoint, {WalkTreeOption::IgnoreNonEditableNode},
BlockInlineCheck::Unused, &aEditingHost)
: HTMLEditUtils::GetNextContent(
caretPoint, {WalkTreeOption::IgnoreNonEditableNode},
BlockInlineCheck::Unused, &aEditingHost);
if (!editableContent) {
return NS_OK;
}
while (editableContent && editableContent->IsCharacterData() &&
!editableContent->Length()) {
editableContent =
howToHandleCollapsedRange ==
EditorBase::HowToHandleCollapsedRange::ExtendBackward
? HTMLEditUtils::GetPreviousContent(
*editableContent, {WalkTreeOption::IgnoreNonEditableNode},
BlockInlineCheck::Unused, &aEditingHost)
: HTMLEditUtils::GetNextContent(
*editableContent, {WalkTreeOption::IgnoreNonEditableNode},
BlockInlineCheck::Unused, &aEditingHost);
}
if (!editableContent) {
return NS_OK;
}
if (!editableContent->IsText()) {
IgnoredErrorResult ignoredError;
aRangeToDelete.SelectNode(*editableContent, ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"nsRange::SelectNode() failed, but ignored");
return NS_OK;
}
if (howToHandleCollapsedRange ==
EditorBase::HowToHandleCollapsedRange::ExtendBackward) {
ExtendRangeToSelectCharacterBackward(
aRangeToDelete,
EditorRawDOMPointInText::AtEndOf(*editableContent->AsText()));
return NS_OK;
}
ExtendRangeToSelectCharacterForward(
aRangeToDelete, EditorRawDOMPointInText(editableContent->AsText(), 0));
return NS_OK;
}
template <typename EditorDOMPointType>
Result<CaretPoint, nsresult> HTMLEditor::DeleteTextAndTextNodesWithTransaction(
const EditorDOMPointType& aStartPoint, const EditorDOMPointType& aEndPoint,
TreatEmptyTextNodes aTreatEmptyTextNodes) {
if (NS_WARN_IF(!aStartPoint.IsSet()) || NS_WARN_IF(!aEndPoint.IsSet())) {
return Err(NS_ERROR_INVALID_ARG);
}
// MOOSE: this routine needs to be modified to preserve the integrity of the
// wsFragment info.
if (aStartPoint == aEndPoint) {
// Nothing to delete
return CaretPoint(EditorDOMPoint());
}
RefPtr<Element> editingHost = ComputeEditingHost();
auto DeleteEmptyContentNodeWithTransaction =
[this, &aTreatEmptyTextNodes, &editingHost](nsIContent& aContent)
MOZ_CAN_RUN_SCRIPT_FOR_DEFINITION -> nsresult {
OwningNonNull<nsIContent> nodeToRemove = aContent;
if (aTreatEmptyTextNodes ==
TreatEmptyTextNodes::RemoveAllEmptyInlineAncestors) {
Element* emptyParentElementToRemove =
HTMLEditUtils::GetMostDistantAncestorEditableEmptyInlineElement(
nodeToRemove, BlockInlineCheck::UseComputedDisplayOutsideStyle,
editingHost);
if (emptyParentElementToRemove) {
nodeToRemove = *emptyParentElementToRemove;
}
}
nsresult rv = DeleteNodeWithTransaction(nodeToRemove);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DeleteNodeWithTransaction() failed");
return rv;
};
if (aStartPoint.GetContainer() == aEndPoint.GetContainer() &&
aStartPoint.IsInTextNode()) {
if (aTreatEmptyTextNodes !=
TreatEmptyTextNodes::KeepIfContainerOfRangeBoundaries &&
aStartPoint.IsStartOfContainer() && aEndPoint.IsEndOfContainer()) {
nsresult rv = DeleteEmptyContentNodeWithTransaction(
MOZ_KnownLive(*aStartPoint.template ContainerAs<Text>()));
if (NS_FAILED(rv)) {
NS_WARNING("deleteEmptyContentNodeWithTransaction() failed");
return Err(rv);
}
return CaretPoint(EditorDOMPoint());
}
RefPtr<Text> textNode = aStartPoint.template ContainerAs<Text>();
Result<CaretPoint, nsresult> caretPointOrError =
DeleteTextWithTransaction(*textNode, aStartPoint.Offset(),
aEndPoint.Offset() - aStartPoint.Offset());
NS_WARNING_ASSERTION(caretPointOrError.isOk(),
"HTMLEditor::DeleteTextWithTransaction() failed");
return caretPointOrError;
}
RefPtr<nsRange> range =
nsRange::Create(aStartPoint.ToRawRangeBoundary(),
aEndPoint.ToRawRangeBoundary(), IgnoreErrors());
if (!range) {
NS_WARNING("nsRange::Create() failed");
return Err(NS_ERROR_FAILURE);
}
// Collect editable text nodes in the given range.
AutoTArray<OwningNonNull<Text>, 16> arrayOfTextNodes;
DOMIterator iter;
if (NS_FAILED(iter.Init(*range))) {
return CaretPoint(EditorDOMPoint()); // Nothing to delete in the range.
}
iter.AppendNodesToArray(
+[](nsINode& aNode, void*) {
MOZ_ASSERT(aNode.IsText());
return HTMLEditUtils::IsSimplyEditableNode(aNode);
},
arrayOfTextNodes);
EditorDOMPoint pointToPutCaret;
for (OwningNonNull<Text>& textNode : arrayOfTextNodes) {
if (textNode == aStartPoint.GetContainer()) {
if (aStartPoint.IsEndOfContainer()) {
continue;
}
if (aStartPoint.IsStartOfContainer() &&
aTreatEmptyTextNodes !=
TreatEmptyTextNodes::KeepIfContainerOfRangeBoundaries) {
AutoTrackDOMPoint trackPointToPutCaret(RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv = DeleteEmptyContentNodeWithTransaction(
MOZ_KnownLive(*aStartPoint.template ContainerAs<Text>()));
if (NS_FAILED(rv)) {
NS_WARNING("DeleteEmptyContentNodeWithTransaction() failed");
return Err(rv);
}
continue;
}
AutoTrackDOMPoint trackPointToPutCaret(RangeUpdaterRef(),
&pointToPutCaret);
Result<CaretPoint, nsresult> caretPointOrError =
DeleteTextWithTransaction(MOZ_KnownLive(textNode),
aStartPoint.Offset(),
textNode->Length() - aStartPoint.Offset());
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed");
return caretPointOrError;
}
trackPointToPutCaret.FlushAndStopTracking();
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
continue;
}
if (textNode == aEndPoint.GetContainer()) {
if (aEndPoint.IsStartOfContainer()) {
break;
}
if (aEndPoint.IsEndOfContainer() &&
aTreatEmptyTextNodes !=
TreatEmptyTextNodes::KeepIfContainerOfRangeBoundaries) {
AutoTrackDOMPoint trackPointToPutCaret(RangeUpdaterRef(),
&pointToPutCaret);
nsresult rv = DeleteEmptyContentNodeWithTransaction(
MOZ_KnownLive(*aEndPoint.template ContainerAs<Text>()));
if (NS_FAILED(rv)) {
NS_WARNING("DeleteEmptyContentNodeWithTransaction() failed");
return Err(rv);
}
trackPointToPutCaret.FlushAndStopTracking();
return CaretPoint(std::move(pointToPutCaret));
}
AutoTrackDOMPoint trackPointToPutCaret(RangeUpdaterRef(),
&pointToPutCaret);
Result<CaretPoint, nsresult> caretPointOrError =
DeleteTextWithTransaction(MOZ_KnownLive(textNode), 0,
aEndPoint.Offset());
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed");
return caretPointOrError;
}
trackPointToPutCaret.FlushAndStopTracking();
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
return CaretPoint(std::move(pointToPutCaret));
}
nsresult rv =
DeleteEmptyContentNodeWithTransaction(MOZ_KnownLive(textNode));
if (NS_FAILED(rv)) {
NS_WARNING("DeleteEmptyContentNodeWithTransaction() failed");
return Err(rv);
}
}
return CaretPoint(std::move(pointToPutCaret));
}
Result<EditorDOMPoint, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::JoinNodesDeepWithTransaction(
HTMLEditor& aHTMLEditor, nsIContent& aLeftContent,
nsIContent& aRightContent) {
// While the rightmost children and their descendants of the left node match
// the leftmost children and their descendants of the right node, join them
// up.
nsCOMPtr<nsIContent> leftContentToJoin = &aLeftContent;
nsCOMPtr<nsIContent> rightContentToJoin = &aRightContent;
nsCOMPtr<nsINode> parentNode = aRightContent.GetParentNode();
EditorDOMPoint ret;
while (leftContentToJoin && rightContentToJoin && parentNode &&
HTMLEditUtils::CanContentsBeJoined(*leftContentToJoin,
*rightContentToJoin)) {
// Do the join
Result<JoinNodesResult, nsresult> joinNodesResult =
aHTMLEditor.JoinNodesWithTransaction(*leftContentToJoin,
*rightContentToJoin);
if (MOZ_UNLIKELY(joinNodesResult.isErr())) {
NS_WARNING("HTMLEditor::JoinNodesWithTransaction() failed");
return joinNodesResult.propagateErr();
}
ret = joinNodesResult.inspect().AtJoinedPoint<EditorDOMPoint>();
if (NS_WARN_IF(!ret.IsSet())) {
return Err(NS_ERROR_FAILURE);
}
if (parentNode->IsText()) {
// We've joined all the way down to text nodes, we're done!
return ret;
}
// Get new left and right nodes, and begin anew
rightContentToJoin = ret.GetCurrentChildAtOffset();
if (rightContentToJoin) {
leftContentToJoin = rightContentToJoin->GetPreviousSibling();
} else {
leftContentToJoin = nullptr;
}
// Skip over non-editable nodes
while (leftContentToJoin && !EditorUtils::IsEditableContent(
*leftContentToJoin, EditorType::HTML)) {
leftContentToJoin = leftContentToJoin->GetPreviousSibling();
}
if (!leftContentToJoin) {
return ret;
}
while (rightContentToJoin && !EditorUtils::IsEditableContent(
*rightContentToJoin, EditorType::HTML)) {
rightContentToJoin = rightContentToJoin->GetNextSibling();
}
if (!rightContentToJoin) {
return ret;
}
}
if (!ret.IsSet()) {
NS_WARNING("HTMLEditor::JoinNodesDeepWithTransaction() joined no contents");
return Err(NS_ERROR_FAILURE);
}
return ret;
}
Result<bool, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::AutoInclusiveAncestorBlockElementsJoiner::Prepare(
const HTMLEditor& aHTMLEditor, const Element& aEditingHost) {
mLeftBlockElement = HTMLEditUtils::GetInclusiveAncestorElement(
mInclusiveDescendantOfLeftBlockElement,
HTMLEditUtils::ClosestEditableBlockElementExceptHRElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
mRightBlockElement = HTMLEditUtils::GetInclusiveAncestorElement(
mInclusiveDescendantOfRightBlockElement,
HTMLEditUtils::ClosestEditableBlockElementExceptHRElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (NS_WARN_IF(!IsSet())) {
mCanJoinBlocks = false;
return Err(NS_ERROR_UNEXPECTED);
}
// Don't join the blocks if both of them are basic structure of the HTML
// document (Note that `<body>` can be joined with its children).
if (mLeftBlockElement->IsAnyOfHTMLElements(nsGkAtoms::html, nsGkAtoms::head,
nsGkAtoms::body) &&
mRightBlockElement->IsAnyOfHTMLElements(nsGkAtoms::html, nsGkAtoms::head,
nsGkAtoms::body)) {
mCanJoinBlocks = false;
return false;
}
if (HTMLEditUtils::IsAnyTableElement(mLeftBlockElement) ||
HTMLEditUtils::IsAnyTableElement(mRightBlockElement)) {
// Do not try to merge table elements, cancel the deletion.
mCanJoinBlocks = false;
return false;
}
// Bail if both blocks the same
if (IsSameBlockElement()) {
mCanJoinBlocks = true; // XXX Anyway, Run() will ingore this case.
mFallbackToDeleteLeafContent = true;
return true;
}
// Joining a list item to its parent is a NOP.
if (HTMLEditUtils::IsAnyListElement(mLeftBlockElement) &&
HTMLEditUtils::IsListItem(mRightBlockElement) &&
mRightBlockElement->GetParentNode() == mLeftBlockElement) {
mCanJoinBlocks = false;
return true;
}
// Special rule here: if we are trying to join list items, and they are in
// different lists, join the lists instead.
if (HTMLEditUtils::IsListItem(mLeftBlockElement) &&
HTMLEditUtils::IsListItem(mRightBlockElement)) {
// XXX leftListElement and/or rightListElement may be not list elements.
Element* leftListElement = mLeftBlockElement->GetParentElement();
Element* rightListElement = mRightBlockElement->GetParentElement();
EditorDOMPoint atChildInBlock;
if (leftListElement && rightListElement &&
leftListElement != rightListElement &&
!EditorUtils::IsDescendantOf(*leftListElement, *mRightBlockElement,
&atChildInBlock) &&
!EditorUtils::IsDescendantOf(*rightListElement, *mLeftBlockElement,
&atChildInBlock)) {
// There are some special complications if the lists are descendants of
// the other lists' items. Note that it is okay for them to be
// descendants of the other lists themselves, which is the usual case for
// sublists in our implementation.
MOZ_DIAGNOSTIC_ASSERT(!atChildInBlock.IsSet());
mLeftBlockElement = leftListElement;
mRightBlockElement = rightListElement;
mNewListElementTagNameOfRightListElement =
Some(leftListElement->NodeInfo()->NameAtom());
}
}
if (!EditorUtils::IsDescendantOf(*mLeftBlockElement, *mRightBlockElement,
&mPointContainingTheOtherBlockElement)) {
Unused << EditorUtils::IsDescendantOf(
*mRightBlockElement, *mLeftBlockElement,
&mPointContainingTheOtherBlockElement);
}
if (mPointContainingTheOtherBlockElement.GetContainer() ==
mRightBlockElement) {
mPrecedingInvisibleBRElement =
WSRunScanner::GetPrecedingBRElementUnlessVisibleContentFound(
WSRunScanner::Scan::EditableNodes,
EditorDOMPoint::AtEndOf(mLeftBlockElement),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
// `WhiteSpaceVisibilityKeeper::
// MergeFirstLineOfRightBlockElementIntoDescendantLeftBlockElement()`
// returns ignored when:
// - No preceding invisible `<br>` element and
// - mNewListElementTagNameOfRightListElement is nothing and
// - There is no content to move from right block element.
if (!mPrecedingInvisibleBRElement) {
if (CanMergeLeftAndRightBlockElements()) {
// Always marked as handled in this case.
mFallbackToDeleteLeafContent = false;
} else {
// Marked as handled only when it actually moves a content node.
Result<bool, nsresult> firstLineHasContent =
AutoMoveOneLineHandler::CanMoveOrDeleteSomethingInLine(
mPointContainingTheOtherBlockElement
.NextPoint<EditorDOMPoint>(),
aEditingHost);
mFallbackToDeleteLeafContent =
firstLineHasContent.isOk() && !firstLineHasContent.inspect();
}
} else {
// Marked as handled when deleting the invisible `<br>` element.
mFallbackToDeleteLeafContent = false;
}
} else if (mPointContainingTheOtherBlockElement.GetContainer() ==
mLeftBlockElement) {
mPrecedingInvisibleBRElement =
WSRunScanner::GetPrecedingBRElementUnlessVisibleContentFound(
WSRunScanner::Scan::EditableNodes,
mPointContainingTheOtherBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
// `WhiteSpaceVisibilityKeeper::
// MergeFirstLineOfRightBlockElementIntoAncestorLeftBlockElement()`
// returns ignored when:
// - No preceding invisible `<br>` element and
// - mNewListElementTagNameOfRightListElement is some and
// - The right block element has no children
// or,
// - No preceding invisible `<br>` element and
// - mNewListElementTagNameOfRightListElement is nothing and
// - There is no content to move from right block element.
if (!mPrecedingInvisibleBRElement) {
if (CanMergeLeftAndRightBlockElements()) {
// Marked as handled only when it actualy moves a content node.
Result<bool, nsresult> rightBlockHasContent =
aHTMLEditor.CanMoveChildren(*mRightBlockElement,
*mLeftBlockElement);
mFallbackToDeleteLeafContent =
rightBlockHasContent.isOk() && !rightBlockHasContent.inspect();
} else {
// Marked as handled only when it actually moves a content node.
Result<bool, nsresult> firstLineHasContent =
AutoMoveOneLineHandler::CanMoveOrDeleteSomethingInLine(
EditorDOMPoint(mRightBlockElement, 0u), aEditingHost);
mFallbackToDeleteLeafContent =
firstLineHasContent.isOk() && !firstLineHasContent.inspect();
}
} else {
// Marked as handled when deleting the invisible `<br>` element.
mFallbackToDeleteLeafContent = false;
}
} else {
mPrecedingInvisibleBRElement =
WSRunScanner::GetPrecedingBRElementUnlessVisibleContentFound(
WSRunScanner::Scan::EditableNodes,
EditorDOMPoint::AtEndOf(mLeftBlockElement),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
// `WhiteSpaceVisibilityKeeper::
// MergeFirstLineOfRightBlockElementIntoLeftBlockElement()` always
// return "handled".
mFallbackToDeleteLeafContent = false;
}
mCanJoinBlocks = true;
return true;
}
nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::
AutoInclusiveAncestorBlockElementsJoiner::ComputeRangeToDelete(
const HTMLEditor& aHTMLEditor, const EditorDOMPoint& aCaretPoint,
nsRange& aRangeToDelete) const {
MOZ_ASSERT(mLeftBlockElement);
MOZ_ASSERT(mRightBlockElement);
if (IsSameBlockElement()) {
if (!aCaretPoint.IsSet()) {
return NS_OK; // The ranges are not collapsed, keep them as-is.
}
nsresult rv = aRangeToDelete.CollapseTo(aCaretPoint.ToRawRangeBoundary());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "nsRange::CollapseTo() failed");
return rv;
}
EditorDOMPoint pointContainingTheOtherBlock;
if (!EditorUtils::IsDescendantOf(*mLeftBlockElement, *mRightBlockElement,
&pointContainingTheOtherBlock)) {
Unused << EditorUtils::IsDescendantOf(
*mRightBlockElement, *mLeftBlockElement, &pointContainingTheOtherBlock);
}
EditorDOMRange range =
WSRunScanner::GetRangeForDeletingBlockElementBoundaries(
WSRunScanner::Scan::EditableNodes, *mLeftBlockElement,
*mRightBlockElement, pointContainingTheOtherBlock);
if (!range.IsPositioned()) {
NS_WARNING(
"WSRunScanner::GetRangeForDeletingBlockElementBoundaries() failed");
return NS_ERROR_FAILURE;
}
if (!aCaretPoint.IsSet()) {
// Don't shrink the original range.
bool noNeedToChangeStart = false;
const EditorDOMPoint atStart(aRangeToDelete.StartRef());
if (atStart.IsBefore(range.StartRef())) {
// If the range starts from end of a container, and computed block
// boundaries range starts from an invisible `<br>` element, we
// may need to shrink the range.
Element* editingHost = aHTMLEditor.ComputeEditingHost();
NS_WARNING_ASSERTION(editingHost, "There was no editing host");
nsIContent* nextContent =
atStart.IsEndOfContainer() && range.StartRef().GetChild() &&
HTMLEditUtils::IsInvisibleBRElement(
*range.StartRef().GetChild())
? HTMLEditUtils::GetNextContent(
*atStart.ContainerAs<nsIContent>(),
{WalkTreeOption::IgnoreDataNodeExceptText,
WalkTreeOption::StopAtBlockBoundary},
BlockInlineCheck::UseComputedDisplayOutsideStyle,
editingHost)
: nullptr;
if (!nextContent || nextContent != range.StartRef().GetChild()) {
noNeedToChangeStart = true;
range.SetStart(EditorRawDOMPoint(aRangeToDelete.StartRef()));
}
}
if (range.EndRef().IsBefore(EditorRawDOMPoint(aRangeToDelete.EndRef()))) {
if (noNeedToChangeStart) {
return NS_OK; // We don't need to modify the range.
}
range.SetEnd(EditorRawDOMPoint(aRangeToDelete.EndRef()));
}
}
nsresult rv =
aRangeToDelete.SetStartAndEnd(range.StartRef().ToRawRangeBoundary(),
range.EndRef().ToRawRangeBoundary());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoClonedRangeArray::SetStartAndEnd() failed");
return rv;
}
Result<DeleteRangeResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::AutoInclusiveAncestorBlockElementsJoiner::Run(
HTMLEditor& aHTMLEditor, const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(mLeftBlockElement);
MOZ_ASSERT(mRightBlockElement);
if (IsSameBlockElement() || !mCanJoinBlocks) {
return DeleteRangeResult::IgnoredResult();
}
const auto ConvertMoveNodeResultToDeleteRangeResult =
[](const EditorDOMPoint& aStartOfRightContent,
MoveNodeResult&& aMoveNodeResult, const Element& aEditingHost)
MOZ_NEVER_INLINE_DEBUG MOZ_CAN_RUN_SCRIPT
-> Result<DeleteRangeResult, nsresult> {
aMoveNodeResult.IgnoreCaretPointSuggestion();
if (MOZ_UNLIKELY(aMoveNodeResult.Ignored())) {
return DeleteRangeResult::IgnoredResult();
}
EditorDOMRange movedLineRange = aMoveNodeResult.UnwrapMovedContentRange();
EditorDOMPoint maybeDeepStartOfRightContent;
if (MOZ_LIKELY(movedLineRange.IsPositioned())) {
if (const Element* const firstMovedElement =
movedLineRange.StartRef().GetChildAs<Element>()) {
maybeDeepStartOfRightContent =
HTMLEditUtils::GetDeepestEditableStartPointOf<EditorDOMPoint>(
*firstMovedElement);
} else {
maybeDeepStartOfRightContent = movedLineRange.StartRef();
}
} else {
maybeDeepStartOfRightContent = aStartOfRightContent;
}
if (NS_WARN_IF(
!maybeDeepStartOfRightContent.IsSetAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
// We should put caret to end of preceding text node if there is.
// Then, users can type text into it like the other browsers.
auto pointToPutCaret = [&]() -> EditorDOMPoint {
const WSRunScanner scanner(WSRunScanner::Scan::EditableNodes,
maybeDeepStartOfRightContent,
BlockInlineCheck::UseComputedDisplayStyle);
const WSScanResult maybePreviousText =
scanner.ScanPreviousVisibleNodeOrBlockBoundaryFrom(
maybeDeepStartOfRightContent);
if (maybePreviousText.IsContentEditable() &&
maybePreviousText.InVisibleOrCollapsibleCharacters()) {
return maybePreviousText.PointAfterReachedContent<EditorDOMPoint>();
}
return maybeDeepStartOfRightContent;
}();
return DeleteRangeResult(std::move(movedLineRange),
std::move(pointToPutCaret));
};
// If the left block element is in the right block element, move the hard
// line including the right block element to end of the left block.
// However, if we are merging list elements, we don't join them.
if (mPointContainingTheOtherBlockElement.GetContainer() ==
mRightBlockElement) {
EditorDOMPoint startOfRightContent =
mPointContainingTheOtherBlockElement.NextPoint();
if (const Element* const element =
startOfRightContent.GetChildAs<Element>()) {
startOfRightContent =
HTMLEditUtils::GetDeepestEditableStartPointOf<EditorDOMPoint>(
*element);
}
AutoTrackDOMPoint trackStartOfRightBlock(aHTMLEditor.RangeUpdaterRef(),
&startOfRightContent);
Result<MoveNodeResult, nsresult> moveFirstLineResult =
WhiteSpaceVisibilityKeeper::
MergeFirstLineOfRightBlockElementIntoDescendantLeftBlockElement(
aHTMLEditor, MOZ_KnownLive(*mLeftBlockElement),
MOZ_KnownLive(*mRightBlockElement),
mPointContainingTheOtherBlockElement,
mNewListElementTagNameOfRightListElement,
MOZ_KnownLive(mPrecedingInvisibleBRElement), aEditingHost);
if (MOZ_UNLIKELY(moveFirstLineResult.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::"
"MergeFirstLineOfRightBlockElementIntoDescendantLeftBlockElement() "
"failed");
return moveFirstLineResult.propagateErr();
}
trackStartOfRightBlock.FlushAndStopTracking();
return ConvertMoveNodeResultToDeleteRangeResult(
startOfRightContent, moveFirstLineResult.unwrap(), aEditingHost);
}
// If the right block element is in the left block element:
// - move list item elements in the right block element to where the left
// list element is
// - or first hard line in the right block element to where:
// - the left block element is.
// - or the given left content in the left block is.
if (mPointContainingTheOtherBlockElement.GetContainer() ==
mLeftBlockElement) {
EditorDOMPoint startOfRightContent =
HTMLEditUtils::GetDeepestEditableStartPointOf<EditorDOMPoint>(
*mRightBlockElement);
AutoTrackDOMPoint trackStartOfRightBlock(aHTMLEditor.RangeUpdaterRef(),
&startOfRightContent);
Result<MoveNodeResult, nsresult> moveFirstLineResult =
WhiteSpaceVisibilityKeeper::
MergeFirstLineOfRightBlockElementIntoAncestorLeftBlockElement(
aHTMLEditor, MOZ_KnownLive(*mLeftBlockElement),
MOZ_KnownLive(*mRightBlockElement),
mPointContainingTheOtherBlockElement,
MOZ_KnownLive(*mInclusiveDescendantOfLeftBlockElement),
mNewListElementTagNameOfRightListElement,
MOZ_KnownLive(mPrecedingInvisibleBRElement), aEditingHost);
if (MOZ_UNLIKELY(moveFirstLineResult.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::"
"MergeFirstLineOfRightBlockElementIntoAncestorLeftBlockElement() "
"failed");
return moveFirstLineResult.propagateErr();
}
trackStartOfRightBlock.FlushAndStopTracking();
return ConvertMoveNodeResultToDeleteRangeResult(
startOfRightContent, moveFirstLineResult.unwrap(), aEditingHost);
}
// Normal case. Blocks are siblings, or at least close enough. An example
// of the latter is <p>paragraph</p><ul><li>one<li>two<li>three</ul>. The
// first li and the p are not true siblings, but we still want to join them
// if you backspace from li into p.
MOZ_ASSERT(!mPointContainingTheOtherBlockElement.IsSet());
EditorDOMPoint startOfRightContent =
HTMLEditUtils::GetDeepestEditableStartPointOf<EditorDOMPoint>(
*mRightBlockElement);
AutoTrackDOMPoint trackStartOfRightBlock(aHTMLEditor.RangeUpdaterRef(),
&startOfRightContent);
Result<MoveNodeResult, nsresult> moveFirstLineResult =
WhiteSpaceVisibilityKeeper::
MergeFirstLineOfRightBlockElementIntoLeftBlockElement(
aHTMLEditor, MOZ_KnownLive(*mLeftBlockElement),
MOZ_KnownLive(*mRightBlockElement),
mNewListElementTagNameOfRightListElement,
MOZ_KnownLive(mPrecedingInvisibleBRElement), aEditingHost);
if (MOZ_UNLIKELY(moveFirstLineResult.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::"
"MergeFirstLineOfRightBlockElementIntoLeftBlockElement() failed");
return moveFirstLineResult.propagateErr();
}
trackStartOfRightBlock.FlushAndStopTracking();
return ConvertMoveNodeResultToDeleteRangeResult(
startOfRightContent, moveFirstLineResult.unwrap(), aEditingHost);
}
// static
Result<bool, nsresult>
HTMLEditor::AutoMoveOneLineHandler::CanMoveOrDeleteSomethingInLine(
const EditorDOMPoint& aPointInHardLine, const Element& aEditingHost) {
if (NS_WARN_IF(!aPointInHardLine.IsSet()) ||
NS_WARN_IF(aPointInHardLine.IsInNativeAnonymousSubtree())) {
return Err(NS_ERROR_INVALID_ARG);
}
RefPtr<nsRange> oneLineRange = AutoClonedRangeArray::
CreateRangeWrappingStartAndEndLinesContainingBoundaries(
aPointInHardLine, aPointInHardLine,
EditSubAction::eMergeBlockContents,
BlockInlineCheck::UseComputedDisplayOutsideStyle, aEditingHost);
if (!oneLineRange || oneLineRange->Collapsed() ||
!oneLineRange->IsPositioned() ||
!oneLineRange->GetStartContainer()->IsContent() ||
!oneLineRange->GetEndContainer()->IsContent()) {
return false;
}
// If there is only a padding `<br>` element in a empty block, it's selected
// by `UpdatePointsToSelectAllChildrenIfCollapsedInEmptyBlockElement()`.
// However, it won't be moved. Although it'll be deleted,
// AutoMoveOneLineHandler returns "ignored". Therefore, we should return
// `false` in this case.
if (nsIContent* childContent = oneLineRange->GetChildAtStartOffset()) {
if (childContent->IsHTMLElement(nsGkAtoms::br) &&
childContent->GetParent()) {
if (const Element* blockElement =
HTMLEditUtils::GetInclusiveAncestorElement(
*childContent->GetParent(),
HTMLEditUtils::ClosestBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle)) {
if (HTMLEditUtils::IsEmptyNode(
*blockElement,
{EmptyCheckOption::TreatNonEditableContentAsInvisible})) {
return false;
}
}
}
}
EditorRawDOMPoint startPoint(oneLineRange->StartRef());
EditorRawDOMPoint endPoint(oneLineRange->EndRef());
// If the range contains only block start boundaries, there is no content to
// move.
if (nsIContent* const startContent = startPoint.GetChild()) {
if (HTMLEditUtils::IsBlockElement(
*startContent, BlockInlineCheck::UseComputedDisplayOutsideStyle)) {
const WSScanResult prevThing =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::All, endPoint,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (prevThing.ReachedCurrentBlockBoundary() &&
prevThing.ElementPtr()->IsInclusiveDescendantOf(startContent)) {
return false;
}
}
}
nsINode* commonAncestor = oneLineRange->GetClosestCommonInclusiveAncestor();
// Currently, we move non-editable content nodes too.
if (!startPoint.IsEndOfContainer()) {
return true;
}
if (!endPoint.IsStartOfContainer()) {
return true;
}
if (startPoint.GetContainer() != commonAncestor) {
while (true) {
EditorRawDOMPoint pointInParent(startPoint.GetContainerAs<nsIContent>());
if (NS_WARN_IF(!pointInParent.IsInContentNode())) {
return Err(NS_ERROR_FAILURE);
}
if (pointInParent.GetContainer() == commonAncestor) {
startPoint = pointInParent;
break;
}
if (!pointInParent.IsEndOfContainer()) {
return true;
}
}
}
if (endPoint.GetContainer() != commonAncestor) {
while (true) {
EditorRawDOMPoint pointInParent(endPoint.GetContainerAs<nsIContent>());
if (NS_WARN_IF(!pointInParent.IsInContentNode())) {
return Err(NS_ERROR_FAILURE);
}
if (pointInParent.GetContainer() == commonAncestor) {
endPoint = pointInParent;
break;
}
if (!pointInParent.IsStartOfContainer()) {
return true;
}
}
}
// If start point and end point in the common ancestor are direct siblings,
// there is no content to move or delete.
// E.g., `<b>abc<br>[</b><i>]<br>def</i>`.
return startPoint.GetNextSiblingOfChild() != endPoint.GetChild();
}
nsresult HTMLEditor::AutoMoveOneLineHandler::Prepare(
HTMLEditor& aHTMLEditor, const EditorDOMPoint& aPointInHardLine,
const Element& aEditingHost) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(aPointInHardLine.IsInContentNode());
MOZ_ASSERT(mPointToInsert.IsSetAndValid());
MOZ_LOG(gOneLineMoverLog, LogLevel::Info,
("Prepare(aHTMLEditor=%p, aPointInHardLine=%s, aEditingHost=%s), "
"mPointToInsert=%s, mMoveToEndOfContainer=%s",
&aHTMLEditor, ToString(aPointInHardLine).c_str(),
ToString(aEditingHost).c_str(), ToString(mPointToInsert).c_str(),
ForceMoveToEndOfContainer() ? "MoveToEndOfContainer::Yes"
: "MoveToEndOfContainer::No"));
if (NS_WARN_IF(mPointToInsert.IsInNativeAnonymousSubtree())) {
MOZ_LOG(
gOneLineMoverLog, LogLevel::Error,
("Failed because mPointToInsert was in a native anonymous subtree"));
return Err(NS_ERROR_INVALID_ARG);
}
mSrcInclusiveAncestorBlock =
aPointInHardLine.IsInContentNode()
? HTMLEditUtils::GetInclusiveAncestorElement(
*aPointInHardLine.ContainerAs<nsIContent>(),
HTMLEditUtils::ClosestBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle)
: nullptr;
mDestInclusiveAncestorBlock =
mPointToInsert.IsInContentNode()
? HTMLEditUtils::GetInclusiveAncestorElement(
*mPointToInsert.ContainerAs<nsIContent>(),
HTMLEditUtils::ClosestBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle)
: nullptr;
mMovingToParentBlock =
mDestInclusiveAncestorBlock && mSrcInclusiveAncestorBlock &&
mDestInclusiveAncestorBlock != mSrcInclusiveAncestorBlock &&
mSrcInclusiveAncestorBlock->IsInclusiveDescendantOf(
mDestInclusiveAncestorBlock);
mTopmostSrcAncestorBlockInDestBlock =
mMovingToParentBlock
? AutoMoveOneLineHandler::
GetMostDistantInclusiveAncestorBlockInSpecificAncestorElement(
*mSrcInclusiveAncestorBlock, *mDestInclusiveAncestorBlock)
: nullptr;
MOZ_ASSERT_IF(mMovingToParentBlock, mTopmostSrcAncestorBlockInDestBlock);
mPreserveWhiteSpaceStyle =
AutoMoveOneLineHandler::ConsiderWhetherPreserveWhiteSpaceStyle(
aPointInHardLine.GetContainerAs<nsIContent>(),
mDestInclusiveAncestorBlock);
AutoClonedRangeArray rangesToWrapTheLine(aPointInHardLine);
rangesToWrapTheLine.ExtendRangesToWrapLines(
EditSubAction::eMergeBlockContents,
BlockInlineCheck::UseComputedDisplayOutsideStyle,
mTopmostSrcAncestorBlockInDestBlock ? *mTopmostSrcAncestorBlockInDestBlock
: aEditingHost);
MOZ_ASSERT(rangesToWrapTheLine.Ranges().Length() <= 1u);
mLineRange = EditorDOMRange(rangesToWrapTheLine.FirstRangeRef());
MOZ_LOG(gOneLineMoverLog, LogLevel::Info,
("mSrcInclusiveAncestorBlock=%s, mDestInclusiveAncestorBlock=%s, "
"mMovingToParentBlock=%s, mTopmostSrcAncestorBlockInDestBlock=%s, "
"mPreserveWhiteSpaceStyle=%s, mLineRange=%s",
mSrcInclusiveAncestorBlock
? ToString(*mSrcInclusiveAncestorBlock).c_str()
: "nullptr",
mDestInclusiveAncestorBlock
? ToString(*mDestInclusiveAncestorBlock).c_str()
: "nullptr",
mMovingToParentBlock ? "true" : "false",
mTopmostSrcAncestorBlockInDestBlock
? ToString(*mTopmostSrcAncestorBlockInDestBlock).c_str()
: "nullptr",
ToString(mPreserveWhiteSpaceStyle).c_str(),
ToString(mLineRange).c_str()));
return NS_OK;
}
Result<CaretPoint, nsresult>
HTMLEditor::AutoMoveOneLineHandler::SplitToMakeTheLineIsolated(
HTMLEditor& aHTMLEditor, const nsIContent& aNewContainer,
const Element& aEditingHost,
nsTArray<OwningNonNull<nsIContent>>& aOutArrayOfContents) const {
AutoClonedRangeArray rangesToWrapTheLine(mLineRange);
Result<EditorDOMPoint, nsresult> splitResult =
rangesToWrapTheLine
.SplitTextAtEndBoundariesAndInlineAncestorsAtBothBoundaries(
aHTMLEditor, BlockInlineCheck::UseComputedDisplayOutsideStyle,
aEditingHost, &aNewContainer);
if (MOZ_UNLIKELY(splitResult.isErr())) {
NS_WARNING(
"AutoClonedRangeArray::"
"SplitTextAtEndBoundariesAndInlineAncestorsAtBothBoundaries() failed");
return Err(splitResult.unwrapErr());
}
EditorDOMPoint pointToPutCaret;
if (splitResult.inspect().IsSet()) {
pointToPutCaret = splitResult.unwrap();
}
nsresult rv = rangesToWrapTheLine.CollectEditTargetNodes(
aHTMLEditor, aOutArrayOfContents, EditSubAction::eMergeBlockContents,
AutoClonedRangeArray::CollectNonEditableNodes::Yes);
if (NS_FAILED(rv)) {
NS_WARNING(
"AutoClonedRangeArray::CollectEditTargetNodes(EditSubAction::"
"eMergeBlockContents, CollectNonEditableNodes::Yes) failed");
return Err(rv);
}
return CaretPoint(pointToPutCaret);
}
// static
Element* HTMLEditor::AutoMoveOneLineHandler::
GetMostDistantInclusiveAncestorBlockInSpecificAncestorElement(
Element& aBlockElement, const Element& aAncestorElement) {
MOZ_ASSERT(aBlockElement.IsInclusiveDescendantOf(&aAncestorElement));
MOZ_ASSERT(HTMLEditUtils::IsBlockElement(
aBlockElement, BlockInlineCheck::UseComputedDisplayOutsideStyle));
if (&aBlockElement == &aAncestorElement) {
return nullptr;
}
Element* lastBlockAncestor = &aBlockElement;
for (Element* element : aBlockElement.InclusiveAncestorsOfType<Element>()) {
if (element == &aAncestorElement) {
return lastBlockAncestor;
}
if (HTMLEditUtils::IsBlockElement(
*lastBlockAncestor,
BlockInlineCheck::UseComputedDisplayOutsideStyle)) {
lastBlockAncestor = element;
}
}
return nullptr;
}
// static
HTMLEditor::PreserveWhiteSpaceStyle
HTMLEditor::AutoMoveOneLineHandler::ConsiderWhetherPreserveWhiteSpaceStyle(
const nsIContent* aContentInLine,
const Element* aInclusiveAncestorBlockOfInsertionPoint) {
if (MOZ_UNLIKELY(!aInclusiveAncestorBlockOfInsertionPoint)) {
return PreserveWhiteSpaceStyle::No;
}
// If we move content from or to <pre>, we don't need to preserve the
// white-space style for compatibility with both our traditional behavior
// and the other browsers.
// TODO: If `white-space` is specified by non-UA stylesheet, we should
// preserve it even if the right block is <pre> for compatibility with the
// other browsers.
const auto IsInclusiveDescendantOfPre = [](const nsIContent& aContent) {
// If the content has different `white-space` style from <pre>, we
// shouldn't treat it as a descendant of <pre> because web apps or
// the user intent to treat the white-spaces in aContent not as `pre`.
if (EditorUtils::GetComputedWhiteSpaceStyles(aContent).valueOr(std::pair(
StyleWhiteSpaceCollapse::Collapse, StyleTextWrapMode::Wrap)) !=
std::pair(StyleWhiteSpaceCollapse::Preserve,
StyleTextWrapMode::Nowrap)) {
return false;
}
for (const Element* element :
aContent.InclusiveAncestorsOfType<Element>()) {
if (element->IsHTMLElement(nsGkAtoms::pre)) {
return true;
}
}
return false;
};
if (IsInclusiveDescendantOfPre(*aInclusiveAncestorBlockOfInsertionPoint) ||
MOZ_UNLIKELY(!aContentInLine) ||
IsInclusiveDescendantOfPre(*aContentInLine)) {
return PreserveWhiteSpaceStyle::No;
}
return PreserveWhiteSpaceStyle::Yes;
}
Result<MoveNodeResult, nsresult> HTMLEditor::AutoMoveOneLineHandler::Run(
HTMLEditor& aHTMLEditor, const Element& aEditingHost) {
EditorDOMPoint pointToInsert(NextInsertionPointRef());
MOZ_ASSERT(pointToInsert.IsInContentNode());
MOZ_LOG(
gOneLineMoverLog, LogLevel::Info,
("Run(aHTMLEditor=%p, aEditingHost=%s), pointToInsert=%s", &aHTMLEditor,
ToString(aEditingHost).c_str(), ToString(pointToInsert).c_str()));
EditorDOMPoint pointToPutCaret;
AutoTArray<OwningNonNull<nsIContent>, 64> arrayOfContents;
{
AutoTrackDOMPoint tackPointToInsert(aHTMLEditor.RangeUpdaterRef(),
&pointToInsert);
Result<CaretPoint, nsresult> splitAtLineEdgesResult =
SplitToMakeTheLineIsolated(
aHTMLEditor,
MOZ_KnownLive(*pointToInsert.ContainerAs<nsIContent>()),
aEditingHost, arrayOfContents);
if (MOZ_UNLIKELY(splitAtLineEdgesResult.isErr())) {
NS_WARNING("AutoMoveOneLineHandler::SplitToMakeTheLineIsolated() failed");
MOZ_LOG(gOneLineMoverLog, LogLevel::Error,
("Run: SplitToMakeTheLineIsolated() failed"));
return splitAtLineEdgesResult.propagateErr();
}
splitAtLineEdgesResult.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
MOZ_LOG(gOneLineMoverLog, LogLevel::Verbose,
("Run: pointToPutCaret=%s", ToString(pointToPutCaret).c_str()));
Result<EditorDOMPoint, nsresult> splitAtBRElementsResult =
aHTMLEditor.MaybeSplitElementsAtEveryBRElement(
arrayOfContents, EditSubAction::eMergeBlockContents);
if (MOZ_UNLIKELY(splitAtBRElementsResult.isErr())) {
NS_WARNING(
"HTMLEditor::MaybeSplitElementsAtEveryBRElement(EditSubAction::"
"eMergeBlockContents) failed");
MOZ_LOG(gOneLineMoverLog, LogLevel::Error,
("Run: MaybeSplitElementsAtEveryBRElement() failed"));
return splitAtBRElementsResult.propagateErr();
}
if (splitAtBRElementsResult.inspect().IsSet()) {
pointToPutCaret = splitAtBRElementsResult.unwrap();
}
MOZ_LOG(gOneLineMoverLog, LogLevel::Verbose,
("Run: pointToPutCaret=%s", ToString(pointToPutCaret).c_str()));
}
if (!pointToInsert.IsSetAndValid()) {
MOZ_LOG(gOneLineMoverLog, LogLevel::Error,
("Run: Failed because pointToInsert pointed invalid position"));
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
if (aHTMLEditor.AllowsTransactionsToChangeSelection() &&
pointToPutCaret.IsSet()) {
nsresult rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed");
MOZ_LOG(gOneLineMoverLog, LogLevel::Error,
("Run: Failed because of "
"aHTMLEditor.CollapseSelectionTo(pointToPutCaret) failure"));
return Err(rv);
}
}
if (arrayOfContents.IsEmpty()) {
MOZ_LOG(gOneLineMoverLog, LogLevel::Info,
("Run: Did nothing because of no content to be moved"));
return MoveNodeResult::IgnoredResult(std::move(pointToInsert));
}
// Track the range which contains the moved contents.
if (ForceMoveToEndOfContainer()) {
pointToInsert = NextInsertionPointRef();
}
EditorDOMRange movedContentRange(pointToInsert);
MoveNodeResult moveContentsInLineResult =
MoveNodeResult::IgnoredResult(pointToInsert);
for (const OwningNonNull<nsIContent>& content : arrayOfContents) {
MOZ_LOG(gOneLineMoverLog, LogLevel::Info,
("Run: content=%s, pointToInsert=%s, movedContentRange=%s, "
"mPointToInsert=%s",
ToString(content.ref()).c_str(), ToString(pointToInsert).c_str(),
ToString(movedContentRange).c_str(),
ToString(mPointToInsert).c_str()));
{
AutoEditorDOMRangeChildrenInvalidator lockOffsets(movedContentRange);
AutoTrackDOMRange trackMovedContentRange(aHTMLEditor.RangeUpdaterRef(),
&movedContentRange);
// If the content is a block element, move all children of it to the
// new container, and then, remove the (probably) empty block element.
if (HTMLEditUtils::IsBlockElement(
content, BlockInlineCheck::UseComputedDisplayOutsideStyle)) {
MOZ_LOG(gOneLineMoverLog, LogLevel::Info,
("Run: Unwrapping children of content because of a block"));
AutoTrackDOMMoveNodeResult trackMoveContentsInLineResult(
aHTMLEditor.RangeUpdaterRef(), &moveContentsInLineResult);
Result<MoveNodeResult, nsresult> moveChildrenResult =
aHTMLEditor.MoveChildrenWithTransaction(
MOZ_KnownLive(*content->AsElement()), pointToInsert,
mPreserveWhiteSpaceStyle, RemoveIfCommentNode::Yes);
if (MOZ_UNLIKELY(moveChildrenResult.isErr())) {
NS_WARNING("HTMLEditor::MoveChildrenWithTransaction() failed");
MOZ_LOG(gOneLineMoverLog, LogLevel::Error,
("Run: MoveChildrenWithTransaction() failed"));
moveContentsInLineResult.IgnoreCaretPointSuggestion();
return moveChildrenResult;
}
trackMoveContentsInLineResult.FlushAndStopTracking();
moveContentsInLineResult |= moveChildrenResult.inspect();
{
AutoTrackDOMMoveNodeResult trackMoveContentsInLineResult(
aHTMLEditor.RangeUpdaterRef(), &moveContentsInLineResult);
// MOZ_KnownLive due to bug 1620312
nsresult rv =
aHTMLEditor.DeleteNodeWithTransaction(MOZ_KnownLive(content));
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
MOZ_LOG(gOneLineMoverLog, LogLevel::Error,
("Run: Aborted because DeleteNodeWithTransaction() caused "
"destroying the editor"));
moveContentsInLineResult.IgnoreCaretPointSuggestion();
return Err(NS_ERROR_EDITOR_DESTROYED);
}
if (NS_FAILED(rv)) {
NS_WARNING(
"EditorBase::DeleteNodeWithTransaction() failed, but ignored");
MOZ_LOG(
gOneLineMoverLog, LogLevel::Warning,
("Run: Failed to delete content but the error was ignored"));
}
}
}
// If the moving content is a comment node or an empty inline node, we
// don't want it to appear in the dist paragraph.
else if (content->IsComment() ||
(content->IsText() && !content->AsText()->TextDataLength()) ||
HTMLEditUtils::IsEmptyInlineContainer(
content,
{EmptyCheckOption::TreatSingleBRElementAsVisible,
EmptyCheckOption::TreatListItemAsVisible,
EmptyCheckOption::TreatTableCellAsVisible,
EmptyCheckOption::TreatNonEditableContentAsInvisible},
BlockInlineCheck::UseComputedDisplayOutsideStyle)) {
nsCOMPtr<nsIContent> emptyContent =
HTMLEditUtils::GetMostDistantAncestorEditableEmptyInlineElement(
content, BlockInlineCheck::UseComputedDisplayOutsideStyle,
&aEditingHost, pointToInsert.ContainerAs<nsIContent>());
if (!emptyContent) {
emptyContent = content;
}
MOZ_LOG(gOneLineMoverLog, LogLevel::Info,
("Run: Deleting content because of %s%s",
content->IsComment() ? "a comment node"
: content->IsText() ? "an empty text node"
: "an empty inline container",
content != emptyContent
? nsPrintfCString(" (deleting topmost empty ancestor: %s)",
ToString(*emptyContent).c_str())
.get()
: ""));
AutoTrackDOMMoveNodeResult trackMoveContentsInLineResult(
aHTMLEditor.RangeUpdaterRef(), &moveContentsInLineResult);
nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(*emptyContent);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
MOZ_LOG(gOneLineMoverLog, LogLevel::Error,
("Run: DeleteNodeWithTransaction() failed"));
moveContentsInLineResult.IgnoreCaretPointSuggestion();
return Err(rv);
}
} else {
MOZ_LOG(gOneLineMoverLog, LogLevel::Info, ("Run: Moving content"));
AutoTrackDOMMoveNodeResult trackMoveContentsInLineResult(
aHTMLEditor.RangeUpdaterRef(), &moveContentsInLineResult);
// MOZ_KnownLive due to bug 1620312
Result<MoveNodeResult, nsresult> moveNodeOrChildrenResult =
aHTMLEditor.MoveNodeOrChildrenWithTransaction(
MOZ_KnownLive(content), pointToInsert, mPreserveWhiteSpaceStyle,
RemoveIfCommentNode::Yes);
if (MOZ_UNLIKELY(moveNodeOrChildrenResult.isErr())) {
NS_WARNING("HTMLEditor::MoveNodeOrChildrenWithTransaction() failed");
MOZ_LOG(gOneLineMoverLog, LogLevel::Error,
("Run: MoveNodeOrChildrenWithTransaction() failed"));
moveContentsInLineResult.IgnoreCaretPointSuggestion();
return moveNodeOrChildrenResult;
}
trackMoveContentsInLineResult.FlushAndStopTracking();
moveContentsInLineResult |= moveNodeOrChildrenResult.inspect();
}
}
MOZ_LOG(gOneLineMoverLog, LogLevel::Info,
("Run: movedContentRange=%s, mPointToInsert=%s",
ToString(movedContentRange).c_str(),
ToString(mPointToInsert).c_str()));
moveContentsInLineResult.ForceToMarkAsHandled();
if (NS_WARN_IF(!movedContentRange.IsPositioned())) {
MOZ_LOG(gOneLineMoverLog, LogLevel::Error,
("Run: Failed because movedContentRange was not positioned"));
moveContentsInLineResult.IgnoreCaretPointSuggestion();
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
// For backward compatibility, we should move contents to end of the
// container if the instance is created without specific insertion point.
if (ForceMoveToEndOfContainer()) {
pointToInsert = NextInsertionPointRef();
MOZ_ASSERT(pointToInsert.IsSet());
MOZ_ASSERT(movedContentRange.StartRef().EqualsOrIsBefore(pointToInsert));
movedContentRange.SetEnd(pointToInsert);
MOZ_LOG(gOneLineMoverLog, LogLevel::Debug,
("Run: Updated movedContentRange end to next insertion point"));
}
// And also if pointToInsert has been made invalid with removing preceding
// children, we should move the content to the end of the container.
else if (aHTMLEditor.MayHaveMutationEventListeners() &&
MOZ_UNLIKELY(!moveContentsInLineResult.NextInsertionPointRef()
.IsSetAndValid())) {
mPointToInsert.SetToEndOf(mPointToInsert.GetContainer());
pointToInsert = NextInsertionPointRef();
movedContentRange.SetEnd(pointToInsert);
MOZ_LOG(gOneLineMoverLog, LogLevel::Debug,
("Run: Updated mPointToInsert to end of container and updated "
"movedContentRange"));
} else {
MOZ_DIAGNOSTIC_ASSERT(
moveContentsInLineResult.NextInsertionPointRef().IsSet());
mPointToInsert = moveContentsInLineResult.NextInsertionPointRef();
pointToInsert = NextInsertionPointRef();
if (!aHTMLEditor.MayHaveMutationEventListeners() ||
movedContentRange.EndRef().IsBefore(pointToInsert)) {
MOZ_ASSERT(pointToInsert.IsSet());
MOZ_ASSERT(
movedContentRange.StartRef().EqualsOrIsBefore(pointToInsert));
movedContentRange.SetEnd(pointToInsert);
MOZ_LOG(gOneLineMoverLog, LogLevel::Debug,
("Run: Updated mPointToInsert and updated movedContentRange"));
} else {
MOZ_LOG(gOneLineMoverLog, LogLevel::Debug,
("Run: Updated only mPointToInsert"));
}
}
}
// Nothing has been moved, we don't need to clean up unnecessary <br> element.
// And also if we're not moving content into a block, we can quit right now.
if (moveContentsInLineResult.Ignored() ||
MOZ_UNLIKELY(!mDestInclusiveAncestorBlock)) {
MOZ_LOG(gOneLineMoverLog, LogLevel::Info,
(moveContentsInLineResult.Ignored()
? "Run: Did nothing for any children"
: "Run: Finished (not dest block)"));
return std::move(moveContentsInLineResult);
}
// If we couldn't track the range to clean up, we should just stop cleaning up
// because returning error from here may change the behavior of web apps using
// mutation event listeners.
if (MOZ_UNLIKELY(!movedContentRange.IsPositioned() ||
movedContentRange.Collapsed())) {
MOZ_LOG(gOneLineMoverLog, LogLevel::Info,
(!movedContentRange.IsPositioned()
? "Run: Finished (Couldn't track moved line)"
: "Run: Finished (Moved line was empty)"));
return std::move(moveContentsInLineResult);
}
{
AutoTrackDOMMoveNodeResult trackMoveContentsInLineResult(
aHTMLEditor.RangeUpdaterRef(), &moveContentsInLineResult);
nsresult rv = DeleteUnnecessaryTrailingLineBreakInMovedLineEnd(
aHTMLEditor, movedContentRange, aEditingHost);
if (NS_FAILED(rv)) {
NS_WARNING(
"AutoMoveOneLineHandler::"
"DeleteUnnecessaryTrailingLineBreakInMovedLineEnd() failed");
MOZ_LOG(
gOneLineMoverLog, LogLevel::Error,
("Run: DeleteUnnecessaryTrailingLineBreakInMovedLineEnd() failed"));
moveContentsInLineResult.IgnoreCaretPointSuggestion();
return Err(rv);
}
}
MOZ_LOG(gOneLineMoverLog, LogLevel::Info, ("Run: Finished"));
return std::move(moveContentsInLineResult);
}
nsresult HTMLEditor::AutoMoveOneLineHandler::
DeleteUnnecessaryTrailingLineBreakInMovedLineEnd(
HTMLEditor& aHTMLEditor, const EditorDOMRange& aMovedContentRange,
const Element& aEditingHost) const {
MOZ_ASSERT(mDestInclusiveAncestorBlock);
MOZ_ASSERT(aMovedContentRange.IsPositioned());
MOZ_ASSERT(!aMovedContentRange.Collapsed());
// If we didn't preserve white-space for backward compatibility and
// white-space becomes not preformatted, we need to clean it up the last text
// node if it ends with a preformatted line break.
if (mPreserveWhiteSpaceStyle == PreserveWhiteSpaceStyle::No) {
const RefPtr<Text> textNodeEndingWithUnnecessaryLineBreak = [&]() -> Text* {
Text* lastTextNode = Text::FromNodeOrNull(
mMovingToParentBlock
? HTMLEditUtils::GetPreviousContent(
*mTopmostSrcAncestorBlockInDestBlock,
{WalkTreeOption::StopAtBlockBoundary},
BlockInlineCheck::UseComputedDisplayOutsideStyle,
mDestInclusiveAncestorBlock)
: HTMLEditUtils::GetLastLeafContent(
*mDestInclusiveAncestorBlock,
{LeafNodeType::LeafNodeOrNonEditableNode}));
if (!lastTextNode ||
!HTMLEditUtils::IsSimplyEditableNode(*lastTextNode)) {
return nullptr;
}
const nsTextFragment& textFragment = lastTextNode->TextFragment();
const char16_t lastCh =
textFragment.GetLength()
? textFragment.CharAt(textFragment.GetLength() - 1u)
: 0;
return lastCh == HTMLEditUtils::kNewLine &&
!EditorUtils::IsNewLinePreformatted(*lastTextNode)
? lastTextNode
: nullptr;
}();
if (textNodeEndingWithUnnecessaryLineBreak) {
if (textNodeEndingWithUnnecessaryLineBreak->TextDataLength() == 1u) {
const RefPtr<Element> inlineElement =
HTMLEditUtils::GetMostDistantAncestorEditableEmptyInlineElement(
*textNodeEndingWithUnnecessaryLineBreak,
BlockInlineCheck::UseComputedDisplayOutsideStyle,
&aEditingHost);
nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(
inlineElement ? static_cast<nsIContent&>(*inlineElement)
: static_cast<nsIContent&>(
*textNodeEndingWithUnnecessaryLineBreak));
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return Err(rv);
}
} else {
Result<CaretPoint, nsresult> caretPointOrError =
aHTMLEditor.DeleteTextWithTransaction(
*textNodeEndingWithUnnecessaryLineBreak,
textNodeEndingWithUnnecessaryLineBreak->TextDataLength() - 1u,
1u);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed");
return caretPointOrError.propagateErr();
}
nsresult rv = caretPointOrError.inspect().SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
}
}
}
const Maybe<EditorLineBreak> lastLineBreak =
mMovingToParentBlock
? HTMLEditUtils::GetUnnecessaryLineBreak<EditorLineBreak>(
*mTopmostSrcAncestorBlockInDestBlock,
ScanLineBreak::BeforeBlock)
: HTMLEditUtils::GetUnnecessaryLineBreak<EditorLineBreak>(
*mDestInclusiveAncestorBlock, ScanLineBreak::AtEndOfBlock);
if (lastLineBreak.isNothing() ||
!lastLineBreak->IsDeletableFromComposedDoc()) {
return NS_OK;
}
const auto atUnnecessaryLineBreak = lastLineBreak->To<EditorRawDOMPoint>();
if (NS_WARN_IF(!atUnnecessaryLineBreak.IsSet())) {
return NS_ERROR_FAILURE;
}
// If the found unnecessary line break is not what we moved above, we
// shouldn't remove it. E.g., the web app may have inserted it intentionally.
MOZ_ASSERT(aMovedContentRange.StartRef().IsSetAndValid());
MOZ_ASSERT(aMovedContentRange.EndRef().IsSetAndValid());
if (!aMovedContentRange.Contains(atUnnecessaryLineBreak)) {
return NS_OK;
}
AutoTransactionsConserveSelection dontChangeMySelection(aHTMLEditor);
Result<EditorDOMPoint, nsresult> lineBreakPointOrError =
aHTMLEditor.DeleteLineBreakWithTransaction(
lastLineBreak.ref(),
aEditingHost.IsContentEditablePlainTextOnly() ? nsIEditor::eNoStrip
: nsIEditor::eStrip,
aEditingHost);
if (MOZ_UNLIKELY(lineBreakPointOrError.isErr())) {
NS_WARNING("HTMLEditor::DeleteLineBreakWithTransaction() failed");
return lineBreakPointOrError.propagateErr();
}
return NS_OK;
}
Result<bool, nsresult> HTMLEditor::CanMoveNodeOrChildren(
const nsIContent& aContent, const nsINode& aNewContainer) const {
if (HTMLEditUtils::CanNodeContain(aNewContainer, aContent)) {
return true;
}
if (aContent.IsElement()) {
return CanMoveChildren(*aContent.AsElement(), aNewContainer);
}
return true;
}
Result<MoveNodeResult, nsresult> HTMLEditor::MoveNodeOrChildrenWithTransaction(
nsIContent& aContentToMove, const EditorDOMPoint& aPointToInsert,
PreserveWhiteSpaceStyle aPreserveWhiteSpaceStyle,
RemoveIfCommentNode aRemoveIfCommentNode) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(aPointToInsert.IsInContentNode());
const auto destWhiteSpaceStyles =
[&]() -> Maybe<std::pair<StyleWhiteSpaceCollapse, StyleTextWrapMode>> {
if (aPreserveWhiteSpaceStyle == PreserveWhiteSpaceStyle::No ||
!aPointToInsert.IsInContentNode()) {
return Nothing();
}
auto styles = EditorUtils::GetComputedWhiteSpaceStyles(
*aPointToInsert.ContainerAs<nsIContent>());
if (NS_WARN_IF(styles.isSome() &&
styles.value().first ==
StyleWhiteSpaceCollapse::PreserveSpaces)) {
return Nothing();
}
return styles;
}();
const auto srcWhiteSpaceStyles =
[&]() -> Maybe<std::pair<StyleWhiteSpaceCollapse, StyleTextWrapMode>> {
if (aPreserveWhiteSpaceStyle == PreserveWhiteSpaceStyle::No) {
return Nothing();
}
auto styles = EditorUtils::GetComputedWhiteSpaceStyles(aContentToMove);
if (NS_WARN_IF(styles.isSome() &&
styles.value().first ==
StyleWhiteSpaceCollapse::PreserveSpaces)) {
return Nothing();
}
return styles;
}();
// Get the `white-space` shorthand form for the given collapse + mode pair.
const auto GetWhiteSpaceStyleValue =
[](std::pair<StyleWhiteSpaceCollapse, StyleTextWrapMode> aStyles) {
if (aStyles.second == StyleTextWrapMode::Wrap) {
switch (aStyles.first) {
case StyleWhiteSpaceCollapse::Collapse:
return u"normal"_ns;
case StyleWhiteSpaceCollapse::Preserve:
return u"pre-wrap"_ns;
case StyleWhiteSpaceCollapse::PreserveBreaks:
return u"pre-line"_ns;
case StyleWhiteSpaceCollapse::PreserveSpaces:
return u"preserve-spaces"_ns;
case StyleWhiteSpaceCollapse::BreakSpaces:
return u"break-spaces"_ns;
}
} else {
switch (aStyles.first) {
case StyleWhiteSpaceCollapse::Collapse:
return u"nowrap"_ns;
case StyleWhiteSpaceCollapse::Preserve:
return u"pre"_ns;
case StyleWhiteSpaceCollapse::PreserveBreaks:
return u"nowrap preserve-breaks"_ns;
case StyleWhiteSpaceCollapse::PreserveSpaces:
return u"nowrap preserve-spaces"_ns;
case StyleWhiteSpaceCollapse::BreakSpaces:
return u"nowrap break-spaces"_ns;
}
}
MOZ_ASSERT_UNREACHABLE("all values should be handled above!");
return u"normal"_ns;
};
if (aRemoveIfCommentNode == RemoveIfCommentNode::Yes &&
aContentToMove.IsComment()) {
EditorDOMPoint pointToInsert(aPointToInsert);
{
AutoTrackDOMPoint trackPointToInsert(RangeUpdaterRef(), &pointToInsert);
nsresult rv = DeleteNodeWithTransaction(aContentToMove);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return Err(rv);
}
}
if (NS_WARN_IF(!pointToInsert.IsSetAndValid())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
return MoveNodeResult::HandledResult(std::move(pointToInsert));
}
// Check if this node can go into the destination node
if (HTMLEditUtils::CanNodeContain(*aPointToInsert.GetContainer(),
aContentToMove)) {
EditorDOMPoint pointToInsert(aPointToInsert);
// Preserve white-space in the new position with using `style` attribute.
// This is additional path from point of view of our traditional behavior.
// Therefore, ignore errors especially if we got unexpected DOM tree.
if (destWhiteSpaceStyles.isSome() && srcWhiteSpaceStyles.isSome() &&
destWhiteSpaceStyles.value() != srcWhiteSpaceStyles.value()) {
// Set `white-space` with `style` attribute if it's nsStyledElement.
if (nsStyledElement* styledElement =
nsStyledElement::FromNode(&aContentToMove)) {
DebugOnly<nsresult> rvIgnored =
CSSEditUtils::SetCSSPropertyWithTransaction(
*this, MOZ_KnownLive(*styledElement), *nsGkAtoms::white_space,
GetWhiteSpaceStyleValue(srcWhiteSpaceStyles.value()));
if (NS_WARN_IF(Destroyed())) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"CSSEditUtils::SetCSSPropertyWithTransaction("
"nsGkAtoms::white_space) failed, but ignored");
}
// Otherwise, if the dest container can have <span> element and <span>
// element can have the moving content node, we should insert it.
else if (HTMLEditUtils::CanNodeContain(*aPointToInsert.GetContainer(),
*nsGkAtoms::span) &&
HTMLEditUtils::CanNodeContain(*nsGkAtoms::span,
aContentToMove)) {
RefPtr<Element> newSpanElement = CreateHTMLContent(nsGkAtoms::span);
if (NS_WARN_IF(!newSpanElement)) {
return Err(NS_ERROR_FAILURE);
}
nsAutoString styleAttrValue(u"white-space: "_ns);
styleAttrValue.Append(
GetWhiteSpaceStyleValue(srcWhiteSpaceStyles.value()));
IgnoredErrorResult error;
newSpanElement->SetAttr(nsGkAtoms::style, styleAttrValue, error);
NS_WARNING_ASSERTION(!error.Failed(),
"Element::SetAttr(nsGkAtoms::span) failed");
if (MOZ_LIKELY(!error.Failed())) {
Result<CreateElementResult, nsresult> insertSpanElementResult =
InsertNodeWithTransaction<Element>(*newSpanElement,
aPointToInsert);
if (MOZ_UNLIKELY(insertSpanElementResult.isErr())) {
if (NS_WARN_IF(insertSpanElementResult.inspectErr() ==
NS_ERROR_EDITOR_DESTROYED)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING(
"HTMLEditor::InsertNodeWithTransaction() failed, but ignored");
} else {
// We should move the node into the new <span> to preserve the
// style.
pointToInsert.Set(newSpanElement, 0u);
// We should put caret after aContentToMove after moving it so that
// we do not need the suggested caret point here.
insertSpanElementResult.inspect().IgnoreCaretPointSuggestion();
}
}
}
}
// If it can, move it there.
Result<MoveNodeResult, nsresult> moveNodeResult =
MoveNodeWithTransaction(aContentToMove, pointToInsert);
NS_WARNING_ASSERTION(moveNodeResult.isOk(),
"HTMLEditor::MoveNodeWithTransaction() failed");
// XXX This is odd to override the handled state here, but stopping this
// hits an NS_ASSERTION in WhiteSpaceVisibilityKeeper::
// MergeFirstLineOfRightBlockElementIntoAncestorLeftBlockElement.
if (moveNodeResult.isOk()) {
MoveNodeResult unwrappedMoveNodeResult = moveNodeResult.unwrap();
unwrappedMoveNodeResult.ForceToMarkAsHandled();
return unwrappedMoveNodeResult;
}
return moveNodeResult;
}
// If it can't, move its children (if any), and then delete it.
auto moveNodeResult =
[&]() MOZ_CAN_RUN_SCRIPT -> Result<MoveNodeResult, nsresult> {
if (!aContentToMove.IsElement()) {
return MoveNodeResult::HandledResult(aPointToInsert);
}
Result<MoveNodeResult, nsresult> moveChildrenResult =
MoveChildrenWithTransaction(MOZ_KnownLive(*aContentToMove.AsElement()),
aPointToInsert, aPreserveWhiteSpaceStyle,
aRemoveIfCommentNode);
NS_WARNING_ASSERTION(moveChildrenResult.isOk(),
"HTMLEditor::MoveChildrenWithTransaction() failed");
return moveChildrenResult;
}();
if (MOZ_UNLIKELY(moveNodeResult.isErr())) {
return moveNodeResult; // Already warned in the lambda.
}
MoveNodeResult unwrappedMoveNodeResult = moveNodeResult.unwrap();
{
AutoTrackDOMMoveNodeResult trackMoveNodeResult(RangeUpdaterRef(),
&unwrappedMoveNodeResult);
nsresult rv = DeleteNodeWithTransaction(aContentToMove);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
unwrappedMoveNodeResult.IgnoreCaretPointSuggestion();
return Err(rv);
}
}
if (!MayHaveMutationEventListeners()) {
return std::move(unwrappedMoveNodeResult);
}
// Mutation event listener may make `offset` value invalid with
// removing some previous children while we call
// `DeleteNodeWithTransaction()` so that we should adjust it here.
if (unwrappedMoveNodeResult.NextInsertionPointRef()
.IsSetAndValidInComposedDoc()) {
return std::move(unwrappedMoveNodeResult);
}
unwrappedMoveNodeResult |= MoveNodeResult::HandledResult(
EditorDOMPoint::AtEndOf(*aPointToInsert.GetContainer()));
return std::move(unwrappedMoveNodeResult);
}
Result<bool, nsresult> HTMLEditor::CanMoveChildren(
const Element& aElement, const nsINode& aNewContainer) const {
if (NS_WARN_IF(&aElement == &aNewContainer)) {
return Err(NS_ERROR_FAILURE);
}
for (nsIContent* childContent = aElement.GetFirstChild(); childContent;
childContent = childContent->GetNextSibling()) {
Result<bool, nsresult> result =
CanMoveNodeOrChildren(*childContent, aNewContainer);
if (result.isErr() || result.inspect()) {
return result;
}
}
return false;
}
Result<MoveNodeResult, nsresult> HTMLEditor::MoveChildrenWithTransaction(
Element& aElement, const EditorDOMPoint& aPointToInsert,
PreserveWhiteSpaceStyle aPreserveWhiteSpaceStyle,
RemoveIfCommentNode aRemoveIfCommentNode) {
MOZ_ASSERT(aPointToInsert.IsSet());
if (NS_WARN_IF(&aElement == aPointToInsert.GetContainer())) {
return Err(NS_ERROR_INVALID_ARG);
}
MoveNodeResult moveChildrenResult =
MoveNodeResult::IgnoredResult(aPointToInsert);
while (nsCOMPtr<nsIContent> firstChild = aElement.GetFirstChild()) {
AutoTrackDOMMoveNodeResult trackMoveChildrenResult(RangeUpdaterRef(),
&moveChildrenResult);
Result<MoveNodeResult, nsresult> moveNodeOrChildrenResult =
MoveNodeOrChildrenWithTransaction(
*firstChild, moveChildrenResult.NextInsertionPointRef(),
aPreserveWhiteSpaceStyle, aRemoveIfCommentNode);
if (MOZ_UNLIKELY(moveNodeOrChildrenResult.isErr())) {
NS_WARNING("HTMLEditor::MoveNodeOrChildrenWithTransaction() failed");
moveChildrenResult.IgnoreCaretPointSuggestion();
return moveNodeOrChildrenResult;
}
trackMoveChildrenResult.FlushAndStopTracking();
moveChildrenResult |= moveNodeOrChildrenResult.inspect();
}
return moveChildrenResult;
}
nsresult HTMLEditor::MoveAllChildren(nsINode& aContainer,
const EditorRawDOMPoint& aPointToInsert) {
if (!aContainer.HasChildren()) {
return NS_OK;
}
nsIContent* firstChild = aContainer.GetFirstChild();
if (NS_WARN_IF(!firstChild)) {
return NS_ERROR_FAILURE;
}
nsIContent* lastChild = aContainer.GetLastChild();
if (NS_WARN_IF(!lastChild)) {
return NS_ERROR_FAILURE;
}
nsresult rv = MoveChildrenBetween(*firstChild, *lastChild, aPointToInsert);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::MoveChildrenBetween() failed");
return rv;
}
nsresult HTMLEditor::MoveChildrenBetween(
nsIContent& aFirstChild, nsIContent& aLastChild,
const EditorRawDOMPoint& aPointToInsert) {
nsCOMPtr<nsINode> oldContainer = aFirstChild.GetParentNode();
if (NS_WARN_IF(oldContainer != aLastChild.GetParentNode()) ||
NS_WARN_IF(!aPointToInsert.IsInContentNode()) ||
NS_WARN_IF(!aPointToInsert.CanContainerHaveChildren())) {
return NS_ERROR_INVALID_ARG;
}
// First, store all children which should be moved to the new container.
AutoTArray<nsCOMPtr<nsIContent>, 10> children;
for (nsIContent* child = &aFirstChild; child;
child = child->GetNextSibling()) {
children.AppendElement(child);
if (child == &aLastChild) {
break;
}
}
if (NS_WARN_IF(children.LastElement() != &aLastChild)) {
return NS_ERROR_INVALID_ARG;
}
nsCOMPtr<nsIContent> newContainer = aPointToInsert.ContainerAs<nsIContent>();
nsCOMPtr<nsIContent> nextNode = aPointToInsert.GetChild();
IgnoredErrorResult error;
for (size_t i = children.Length(); i > 0; --i) {
nsCOMPtr<nsIContent>& child = children[i - 1];
if (child->GetParentNode() != oldContainer) {
// If the child has been moved to different container, we shouldn't
// touch it.
continue;
}
if (NS_WARN_IF(!HTMLEditUtils::IsRemovableNode(*child))) {
return NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE;
}
oldContainer->RemoveChild(*child, error);
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (error.Failed()) {
NS_WARNING("nsINode::RemoveChild() failed");
return error.StealNSResult();
}
if (nextNode) {
// If we're not appending the children to the new container, we should
// check if referring next node of insertion point is still in the new
// container.
EditorRawDOMPoint pointToInsert(nextNode);
if (NS_WARN_IF(!pointToInsert.IsSet()) ||
NS_WARN_IF(pointToInsert.GetContainer() != newContainer)) {
// The next node of insertion point has been moved by mutation observer.
// Let's stop moving the remaining nodes.
// XXX Or should we move remaining children after the last moved child?
return NS_ERROR_FAILURE;
}
}
if (NS_WARN_IF(
newContainer->IsInComposedDoc() &&
!EditorUtils::IsEditableContent(*newContainer, EditorType::HTML))) {
return NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE;
}
newContainer->InsertBefore(*child, nextNode, error);
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (error.Failed()) {
NS_WARNING("nsINode::InsertBefore() failed");
return error.StealNSResult();
}
// If the child was inserted or appended properly, the following children
// should be inserted before it. Otherwise, keep using current position.
if (child->GetParentNode() == newContainer) {
nextNode = child;
}
}
return NS_OK;
}
nsresult HTMLEditor::MovePreviousSiblings(
nsIContent& aChild, const EditorRawDOMPoint& aPointToInsert) {
if (NS_WARN_IF(!aChild.GetParentNode())) {
return NS_ERROR_INVALID_ARG;
}
nsIContent* firstChild = aChild.GetParentNode()->GetFirstChild();
if (NS_WARN_IF(!firstChild)) {
return NS_ERROR_FAILURE;
}
nsIContent* lastChild =
&aChild == firstChild ? firstChild : aChild.GetPreviousSibling();
if (NS_WARN_IF(!lastChild)) {
return NS_ERROR_FAILURE;
}
nsresult rv = MoveChildrenBetween(*firstChild, *lastChild, aPointToInsert);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::MoveChildrenBetween() failed");
return rv;
}
nsresult HTMLEditor::MoveInclusiveNextSiblings(
nsIContent& aChild, const EditorRawDOMPoint& aPointToInsert) {
if (NS_WARN_IF(!aChild.GetParentNode())) {
return NS_ERROR_INVALID_ARG;
}
nsIContent* lastChild = aChild.GetParentNode()->GetLastChild();
if (NS_WARN_IF(!lastChild)) {
return NS_ERROR_FAILURE;
}
nsresult rv = MoveChildrenBetween(aChild, *lastChild, aPointToInsert);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::MoveChildrenBetween() failed");
return rv;
}
Result<DeleteRangeResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoBlockElementsJoiner::DeleteContentButKeepTableStructure(
HTMLEditor& aHTMLEditor, nsIContent& aContent) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
if (!HTMLEditUtils::IsAnyTableElementButNotTable(&aContent)) {
nsCOMPtr<nsINode> parentNode = aContent.GetParentNode();
if (NS_WARN_IF(!parentNode)) {
return Err(NS_ERROR_FAILURE);
}
nsCOMPtr<nsIContent> nextSibling = aContent.GetNextSibling();
nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(aContent);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return Err(rv);
}
if (NS_WARN_IF(nextSibling && nextSibling->GetParentNode() != parentNode) ||
NS_WARN_IF(!parentNode->IsInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
return DeleteRangeResult(
EditorDOMRange(nextSibling ? EditorDOMPoint(nextSibling)
: EditorDOMPoint::AtEndOf(*parentNode)),
EditorDOMPoint());
}
// XXX For performance, this should just call
// DeleteContentButKeepTableStructure() while there are children in
// aContent. If we need to avoid infinite loop because mutation event
// listeners can add unexpected nodes into aContent, we should just loop
// only original count of the children.
AutoTArray<OwningNonNull<nsIContent>, 10> childList;
for (nsIContent* child = aContent.GetFirstChild(); child;
child = child->GetNextSibling()) {
childList.AppendElement(*child);
}
for (const auto& child : childList) {
// MOZ_KnownLive because 'childList' is guaranteed to
// keep it alive.
Result<DeleteRangeResult, nsresult> deleteChildResult =
DeleteContentButKeepTableStructure(aHTMLEditor, MOZ_KnownLive(child));
if (MOZ_UNLIKELY(deleteChildResult.isErr())) {
NS_WARNING("HTMLEditor::DeleteContentButKeepTableStructure() failed");
return deleteChildResult.propagateErr();
}
deleteChildResult.unwrap().IgnoreCaretPointSuggestion();
}
if (NS_WARN_IF(!aContent.IsInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
// Insert a <br> into new empty table cell or caption because we don't have a
// change to do it for the middle of the range. Note that this does not
// handle first cell/caption and end cell/caption at the deleting range. They
// should be handled by upper level because we may need to delete unnecessary
// new empty inline ancestors in the cells/captions.
if (!HTMLEditUtils::IsTableCellOrCaption(aContent) ||
aContent.GetChildCount()) {
return DeleteRangeResult(EditorDOMRange(EditorDOMPoint(&aContent, 0u),
EditorDOMPoint::AtEndOf(aContent)),
EditorDOMPoint());
}
Result<CreateLineBreakResult, nsresult> insertLineBreakResultOrError =
aHTMLEditor.InsertLineBreak(WithTransaction::Yes,
LineBreakType::BRElement,
EditorDOMPoint(&aContent, 0));
if (MOZ_UNLIKELY(insertLineBreakResultOrError.isErr())) {
NS_WARNING(
"HTMLEditor::InsertLineBreak(WithTransaction::Yes, "
"LineBreakType::BRElement) failed");
return insertLineBreakResultOrError.propagateErr();
}
CreateLineBreakResult insertLineBreakResult =
insertLineBreakResultOrError.unwrap();
insertLineBreakResult.IgnoreCaretPointSuggestion();
return DeleteRangeResult(EditorDOMRange(EditorDOMPoint(&aContent, 0u)),
EditorDOMPoint());
}
nsresult HTMLEditor::DeleteMostAncestorMailCiteElementIfEmpty(
nsIContent& aContent) {
MOZ_ASSERT(IsEditActionDataAvailable());
// The element must be `<blockquote type="cite">` or
// `<span _moz_quote="true">`.
RefPtr<Element> mailCiteElement =
GetMostDistantAncestorMailCiteElement(aContent);
if (!mailCiteElement) {
return NS_OK;
}
bool seenBR = false;
if (!HTMLEditUtils::IsEmptyNode(
*mailCiteElement,
{EmptyCheckOption::TreatListItemAsVisible,
EmptyCheckOption::TreatTableCellAsVisible,
EmptyCheckOption::TreatNonEditableContentAsInvisible},
&seenBR)) {
return NS_OK;
}
EditorDOMPoint atEmptyMailCiteElement(mailCiteElement);
{
AutoEditorDOMPointChildInvalidator lockOffset(atEmptyMailCiteElement);
nsresult rv = DeleteNodeWithTransaction(*mailCiteElement);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return rv;
}
}
if (!atEmptyMailCiteElement.IsSet() || !seenBR) {
NS_WARNING_ASSERTION(
atEmptyMailCiteElement.IsSet(),
"Mutation event listener might changed the DOM tree during "
"EditorBase::DeleteNodeWithTransaction(), but ignored");
return NS_OK;
}
Result<CreateLineBreakResult, nsresult> insertBRElementResultOrError =
InsertLineBreak(WithTransaction::Yes, LineBreakType::BRElement,
atEmptyMailCiteElement);
if (MOZ_UNLIKELY(insertBRElementResultOrError.isErr())) {
NS_WARNING(
"HTMLEditor::InsertLineBreak(WithTransaction::Yes, "
"LineBreakType::BRElement) failed");
return insertBRElementResultOrError.unwrapErr();
}
CreateLineBreakResult insertBRElementResult =
insertBRElementResultOrError.unwrap();
MOZ_ASSERT(insertBRElementResult.Handled());
nsresult rv = insertBRElementResult.SuggestCaretPointTo(
*this, {SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return rv;
}
NS_WARNING_ASSERTION(rv == NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
return NS_OK;
}
Element* HTMLEditor::AutoDeleteRangesHandler::AutoEmptyBlockAncestorDeleter::
ScanEmptyBlockInclusiveAncestor(const HTMLEditor& aHTMLEditor,
nsIContent& aStartContent) {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!mEmptyInclusiveAncestorBlockElement);
// If we are inside an empty block, delete it.
// Note: do NOT delete table elements this way.
// Note: do NOT delete non-editable block element.
Element* editableBlockElement = HTMLEditUtils::GetInclusiveAncestorElement(
aStartContent, HTMLEditUtils::ClosestEditableBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (!editableBlockElement) {
return nullptr;
}
// XXX Perhaps, this is slow loop. If empty blocks are nested, then,
// each block checks whether it's empty or not. However, descendant
// blocks are checked again and again by IsEmptyNode(). Perhaps, it
// should be able to take "known empty element" for avoiding same checks.
while (editableBlockElement &&
HTMLEditUtils::IsRemovableFromParentNode(*editableBlockElement) &&
!HTMLEditUtils::IsAnyTableElement(editableBlockElement) &&
HTMLEditUtils::IsEmptyNode(*editableBlockElement)) {
// If the removable empty list item is a child of editing host list element,
// we should not delete it.
if (HTMLEditUtils::IsListItem(editableBlockElement)) {
Element* const parentElement = editableBlockElement->GetParentElement();
if (parentElement && HTMLEditUtils::IsAnyListElement(parentElement) &&
!HTMLEditUtils::IsRemovableFromParentNode(*parentElement) &&
HTMLEditUtils::IsEmptyNode(*parentElement)) {
break;
}
}
mEmptyInclusiveAncestorBlockElement = editableBlockElement;
editableBlockElement = HTMLEditUtils::GetAncestorElement(
*mEmptyInclusiveAncestorBlockElement,
HTMLEditUtils::ClosestEditableBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
}
if (!mEmptyInclusiveAncestorBlockElement) {
return nullptr;
}
// XXX Because of not checking whether found block element is editable
// in the above loop, empty ediable block element may be overwritten
// with empty non-editable clock element. Therefore, we fail to
// remove the found empty nodes.
if (NS_WARN_IF(!mEmptyInclusiveAncestorBlockElement->IsEditable()) ||
NS_WARN_IF(!mEmptyInclusiveAncestorBlockElement->GetParentElement())) {
mEmptyInclusiveAncestorBlockElement = nullptr;
}
return mEmptyInclusiveAncestorBlockElement;
}
nsresult HTMLEditor::AutoDeleteRangesHandler::AutoEmptyBlockAncestorDeleter::
ComputeTargetRanges(const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount,
const Element& aEditingHost,
AutoClonedSelectionRangeArray& aRangesToDelete) const {
MOZ_ASSERT(mEmptyInclusiveAncestorBlockElement);
// We'll delete `mEmptyInclusiveAncestorBlockElement` node from the tree, but
// we should return the range from start/end of next/previous editable content
// to end/start of the element for compatiblity with the other browsers.
switch (aDirectionAndAmount) {
case nsIEditor::eNone:
break;
case nsIEditor::ePrevious:
case nsIEditor::ePreviousWord:
case nsIEditor::eToBeginningOfLine: {
EditorRawDOMPoint startPoint =
HTMLEditUtils::GetPreviousEditablePoint<EditorRawDOMPoint>(
*mEmptyInclusiveAncestorBlockElement, &aEditingHost,
!StaticPrefs::editor_white_space_normalization_blink_compatible()
// In this case, we don't join block elements so that we won't
// delete invisible trailing whitespaces in the previous
// element.
? InvisibleWhiteSpaces::Preserve
// With the new normalizer, we'ill delete invisible
// white-spaces.
: InvisibleWhiteSpaces::Ignore,
// In this case, we won't join table cells so that we should
// get a range which is in a table cell even if it's in a
// table.
TableBoundary::NoCrossAnyTableElement);
if (!startPoint.IsSet()) {
NS_WARNING(
"HTMLEditUtils::GetPreviousEditablePoint() didn't return a valid "
"point");
return NS_ERROR_FAILURE;
}
nsresult rv = aRangesToDelete.SetStartAndEnd(
startPoint,
EditorRawDOMPoint::AtEndOf(mEmptyInclusiveAncestorBlockElement));
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoClonedRangeArray::SetStartAndEnd() failed");
return rv;
}
case nsIEditor::eNext:
case nsIEditor::eNextWord:
case nsIEditor::eToEndOfLine: {
EditorRawDOMPoint endPoint =
HTMLEditUtils::GetNextEditablePoint<EditorRawDOMPoint>(
*mEmptyInclusiveAncestorBlockElement, &aEditingHost,
!StaticPrefs::editor_white_space_normalization_blink_compatible()
// In this case, we don't join block elements so that we won't
// delete invisible trailing whitespaces in the next element.
? InvisibleWhiteSpaces::Preserve
// With the new normalizer, we'ill delete invisible
// white-spaces.
: InvisibleWhiteSpaces::Ignore,
// In this case, we won't join table cells so that we should
// get a range which is in a table cell even if it's in a
// table.
TableBoundary::NoCrossAnyTableElement);
if (!endPoint.IsSet()) {
NS_WARNING(
"HTMLEditUtils::GetNextEditablePoint() didn't return a valid "
"point");
return NS_ERROR_FAILURE;
}
nsresult rv = aRangesToDelete.SetStartAndEnd(
EditorRawDOMPoint(mEmptyInclusiveAncestorBlockElement, 0), endPoint);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoClonedRangeArray::SetStartAndEnd() failed");
return rv;
}
default:
MOZ_ASSERT_UNREACHABLE("Handle the nsIEditor::EDirection value");
break;
}
// No direction, let's select the element to be deleted.
nsresult rv =
aRangesToDelete.SelectNode(*mEmptyInclusiveAncestorBlockElement);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"AutoClonedRangeArray::SelectNode() failed");
return rv;
}
Result<CreateLineBreakResult, nsresult>
HTMLEditor::AutoDeleteRangesHandler::AutoEmptyBlockAncestorDeleter::
MaybeInsertBRElementBeforeEmptyListItemElement(HTMLEditor& aHTMLEditor) {
MOZ_ASSERT(mEmptyInclusiveAncestorBlockElement);
MOZ_ASSERT(mEmptyInclusiveAncestorBlockElement->GetParentElement());
MOZ_ASSERT(HTMLEditUtils::IsListItem(mEmptyInclusiveAncestorBlockElement));
// If the found empty block is a list item element and its grand parent
// (i.e., parent of list element) is NOT a list element, insert <br>
// element before the list element which has the empty list item.
// This odd list structure may occur if `Document.execCommand("indent")`
// is performed for list items.
// XXX Chrome does not remove empty list elements when last content in
// last list item is deleted. We should follow it since current
// behavior is annoying when you type new list item with selecting
// all list items.
if (!HTMLEditUtils::IsFirstChild(*mEmptyInclusiveAncestorBlockElement,
{WalkTreeOption::IgnoreNonEditableNode})) {
return CreateLineBreakResult::NotHandled();
}
const EditorDOMPoint atParentOfEmptyListItem(
mEmptyInclusiveAncestorBlockElement->GetParentElement());
if (NS_WARN_IF(!atParentOfEmptyListItem.IsSet())) {
return Err(NS_ERROR_FAILURE);
}
if (HTMLEditUtils::IsAnyListElement(atParentOfEmptyListItem.GetContainer())) {
return CreateLineBreakResult::NotHandled();
}
Result<CreateLineBreakResult, nsresult> insertBRElementResultOrError =
aHTMLEditor.InsertLineBreak(WithTransaction::Yes,
LineBreakType::BRElement,
atParentOfEmptyListItem);
if (MOZ_UNLIKELY(insertBRElementResultOrError.isErr())) {
NS_WARNING(
"HTMLEditor::InsertLineBreak(WithTransaction::Yes, "
"LineBreakType::BRElement) failed");
return insertBRElementResultOrError.propagateErr();
}
CreateLineBreakResult insertBRElementResult =
insertBRElementResultOrError.unwrap();
nsresult rv = insertBRElementResult.SuggestCaretPointTo(
aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
return Err(rv);
}
MOZ_ASSERT(insertBRElementResult.Handled());
return std::move(insertBRElementResult);
}
Result<CaretPoint, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoEmptyBlockAncestorDeleter::GetNewCaretPosition(
const HTMLEditor& aHTMLEditor,
nsIEditor::EDirection aDirectionAndAmount) const {
MOZ_ASSERT(mEmptyInclusiveAncestorBlockElement);
MOZ_ASSERT(mEmptyInclusiveAncestorBlockElement->GetParentElement());
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
switch (aDirectionAndAmount) {
case nsIEditor::eNext:
case nsIEditor::eNextWord:
case nsIEditor::eToEndOfLine: {
// Collapse Selection to next node of after empty block element
// if there is. Otherwise, to just after the empty block.
auto afterEmptyBlock(
EditorDOMPoint::After(mEmptyInclusiveAncestorBlockElement));
MOZ_ASSERT(afterEmptyBlock.IsSet());
if (nsIContent* nextContentOfEmptyBlock = HTMLEditUtils::GetNextContent(
afterEmptyBlock, {}, BlockInlineCheck::Unused,
aHTMLEditor.ComputeEditingHost())) {
EditorDOMPoint pt = HTMLEditUtils::GetGoodCaretPointFor<EditorDOMPoint>(
*nextContentOfEmptyBlock, aDirectionAndAmount);
if (!pt.IsSet()) {
NS_WARNING("HTMLEditUtils::GetGoodCaretPointFor() failed");
return Err(NS_ERROR_FAILURE);
}
return CaretPoint(std::move(pt));
}
if (NS_WARN_IF(!afterEmptyBlock.IsSet())) {
return Err(NS_ERROR_FAILURE);
}
return CaretPoint(std::move(afterEmptyBlock));
}
case nsIEditor::ePrevious:
case nsIEditor::ePreviousWord:
case nsIEditor::eToBeginningOfLine: {
// Collapse Selection to previous editable node of the empty block
// if there is. Otherwise, to after the empty block.
EditorRawDOMPoint atEmptyBlock(mEmptyInclusiveAncestorBlockElement);
if (nsIContent* previousContentOfEmptyBlock =
HTMLEditUtils::GetPreviousContent(
atEmptyBlock, {WalkTreeOption::IgnoreNonEditableNode},
BlockInlineCheck::Unused, aHTMLEditor.ComputeEditingHost())) {
EditorDOMPoint pt = HTMLEditUtils::GetGoodCaretPointFor<EditorDOMPoint>(
*previousContentOfEmptyBlock, aDirectionAndAmount);
if (!pt.IsSet()) {
NS_WARNING("HTMLEditUtils::GetGoodCaretPointFor() failed");
return Err(NS_ERROR_FAILURE);
}
return CaretPoint(std::move(pt));
}
auto afterEmptyBlock =
EditorDOMPoint::After(*mEmptyInclusiveAncestorBlockElement);
if (NS_WARN_IF(!afterEmptyBlock.IsSet())) {
return Err(NS_ERROR_FAILURE);
}
return CaretPoint(std::move(afterEmptyBlock));
}
case nsIEditor::eNone: {
// Collapse selection at the removing block when we are replacing
// selected content.
EditorDOMPoint atEmptyBlock(mEmptyInclusiveAncestorBlockElement);
if (NS_WARN_IF(!atEmptyBlock.IsSet())) {
return Err(NS_ERROR_FAILURE);
}
return CaretPoint(std::move(atEmptyBlock));
}
default:
MOZ_CRASH(
"AutoEmptyBlockAncestorDeleter doesn't support this action yet");
return Err(NS_ERROR_FAILURE);
}
}
Result<DeleteRangeResult, nsresult>
HTMLEditor::AutoDeleteRangesHandler::AutoEmptyBlockAncestorDeleter::Run(
HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount,
const Element& aEditingHost) {
MOZ_ASSERT(mEmptyInclusiveAncestorBlockElement);
MOZ_ASSERT(mEmptyInclusiveAncestorBlockElement->GetParentElement());
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
{
Result<DeleteRangeResult, nsresult> replaceSubListResultOrError =
MaybeReplaceSubListWithNewListItem(aHTMLEditor);
if (MOZ_UNLIKELY(replaceSubListResultOrError.isErr())) {
NS_WARNING(
"AutoEmptyBlockAncestorDeleter::MaybeReplaceSubListWithNewListItem() "
"failed");
return replaceSubListResultOrError.propagateErr();
}
if (replaceSubListResultOrError.inspect().Handled()) {
return replaceSubListResultOrError;
}
}
auto caretPointOrError = [&]() MOZ_CAN_RUN_SCRIPT MOZ_NEVER_INLINE_DEBUG
-> Result<CaretPoint, nsresult> {
if (HTMLEditUtils::IsListItem(mEmptyInclusiveAncestorBlockElement)) {
Result<CreateLineBreakResult, nsresult> insertBRElementResultOrError =
MaybeInsertBRElementBeforeEmptyListItemElement(aHTMLEditor);
if (MOZ_UNLIKELY(insertBRElementResultOrError.isErr())) {
NS_WARNING(
"AutoEmptyBlockAncestorDeleter::"
"MaybeInsertBRElementBeforeEmptyListItemElement() failed");
return insertBRElementResultOrError.propagateErr();
}
CreateLineBreakResult insertBRElementResult =
insertBRElementResultOrError.unwrap();
// If a `<br>` element is inserted, caret should be moved to after it.
// XXX This comment is wrong, we're suggesting the line break position...
MOZ_ASSERT_IF(insertBRElementResult.Handled(),
insertBRElementResult->IsHTMLBRElement());
insertBRElementResult.IgnoreCaretPointSuggestion();
return CaretPoint(
insertBRElementResult.Handled()
? insertBRElementResult.AtLineBreak<EditorDOMPoint>()
: EditorDOMPoint());
}
Result<CaretPoint, nsresult> caretPointOrError =
GetNewCaretPosition(aHTMLEditor, aDirectionAndAmount);
NS_WARNING_ASSERTION(
caretPointOrError.isOk(),
"AutoEmptyBlockAncestorDeleter::GetNewCaretPosition() failed");
MOZ_ASSERT_IF(caretPointOrError.isOk(),
caretPointOrError.inspect().HasCaretPointSuggestion());
return caretPointOrError;
}();
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
return caretPointOrError.propagateErr();
}
EditorDOMPoint pointToPutCaret =
caretPointOrError.unwrap().UnwrapCaretPoint();
const bool unwrapAncestorBlocks =
!HTMLEditUtils::IsListItem(mEmptyInclusiveAncestorBlockElement) &&
pointToPutCaret.GetContainer() ==
mEmptyInclusiveAncestorBlockElement->GetParentNode();
EditorDOMPoint atEmptyInclusiveAncestorBlockElement(
mEmptyInclusiveAncestorBlockElement);
{
AutoTrackDOMPoint trackEmptyBlockPoint(
aHTMLEditor.RangeUpdaterRef(), &atEmptyInclusiveAncestorBlockElement);
AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(),
&pointToPutCaret);
if (!StaticPrefs::editor_white_space_normalization_blink_compatible()) {
nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(
MOZ_KnownLive(*mEmptyInclusiveAncestorBlockElement));
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return Err(rv);
}
} else {
Result<CaretPoint, nsresult> caretPointOrError =
WhiteSpaceVisibilityKeeper::DeleteContentNodeAndJoinTextNodesAroundIt(
aHTMLEditor, MOZ_KnownLive(*mEmptyInclusiveAncestorBlockElement),
pointToPutCaret, aEditingHost);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING(
"WhiteSpaceVisibilityKeeper::"
"DeleteContentNodeAndJoinTextNodesAroundIt() failed");
return caretPointOrError.propagateErr();
}
caretPointOrError.unwrap().MoveCaretPointTo(
pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion});
}
trackEmptyBlockPoint.FlushAndStopTracking();
trackPointToPutCaret.FlushAndStopTracking();
if (NS_WARN_IF(!atEmptyInclusiveAncestorBlockElement
.IsInContentNodeAndValidInComposedDoc()) ||
NS_WARN_IF(pointToPutCaret.IsSet() &&
!pointToPutCaret.IsInContentNodeAndValidInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
EditorDOMPoint pointToInsertLineBreak =
std::move(atEmptyInclusiveAncestorBlockElement);
DeleteRangeResult deleteNodeResult(pointToInsertLineBreak,
std::move(pointToPutCaret));
if ((aHTMLEditor.IsMailEditor() || aHTMLEditor.IsPlaintextMailComposer()) &&
MOZ_LIKELY(pointToInsertLineBreak.IsInContentNode())) {
AutoTrackDOMDeleteRangeResult trackDeleteNodeResult(
aHTMLEditor.RangeUpdaterRef(), &deleteNodeResult);
AutoTrackDOMPoint trackPointToInsertLineBreak(aHTMLEditor.RangeUpdaterRef(),
&pointToInsertLineBreak);
nsresult rv = aHTMLEditor.DeleteMostAncestorMailCiteElementIfEmpty(
MOZ_KnownLive(*pointToInsertLineBreak.ContainerAs<nsIContent>()));
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::DeleteMostAncestorMailCiteElementIfEmpty() failed");
deleteNodeResult.IgnoreCaretPointSuggestion();
return Err(rv);
}
trackPointToInsertLineBreak.FlushAndStopTracking();
if (NS_WARN_IF(!pointToInsertLineBreak.IsSetAndValidInComposedDoc())) {
deleteNodeResult.IgnoreCaretPointSuggestion();
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
trackDeleteNodeResult.FlushAndStopTracking();
deleteNodeResult |= DeleteRangeResult(
EditorDOMRange(pointToInsertLineBreak), EditorDOMPoint());
}
if (unwrapAncestorBlocks && aHTMLEditor.GetTopLevelEditSubAction() ==
EditSubAction::eDeleteSelectedContent) {
AutoTrackDOMDeleteRangeResult trackDeleteNodeResult(
aHTMLEditor.RangeUpdaterRef(), &deleteNodeResult);
Result<CreateLineBreakResult, nsresult> insertPaddingBRElementOrError =
aHTMLEditor.InsertPaddingBRElementIfNeeded(
pointToInsertLineBreak,
aEditingHost.IsContentEditablePlainTextOnly() ? nsIEditor::eNoStrip
: nsIEditor::eStrip,
aEditingHost);
if (MOZ_UNLIKELY(insertPaddingBRElementOrError.isErr())) {
NS_WARNING("HTMLEditor::InsertPaddingBRElementIfNeeded() failed");
deleteNodeResult.IgnoreCaretPointSuggestion();
return insertPaddingBRElementOrError.propagateErr();
}
insertPaddingBRElementOrError.unwrap().IgnoreCaretPointSuggestion();
}
MOZ_ASSERT(deleteNodeResult.Handled());
return std::move(deleteNodeResult);
}
Result<DeleteRangeResult, nsresult> HTMLEditor::AutoDeleteRangesHandler::
AutoEmptyBlockAncestorDeleter::MaybeReplaceSubListWithNewListItem(
HTMLEditor& aHTMLEditor) {
// If we're deleting sublist element and it's the last list item of its parent
// list, we should replace it with a list element.
if (!HTMLEditUtils::IsAnyListElement(mEmptyInclusiveAncestorBlockElement)) {
return DeleteRangeResult::IgnoredResult();
}
const RefPtr<Element> parentElement =
mEmptyInclusiveAncestorBlockElement->GetParentElement();
if (!parentElement || !HTMLEditUtils::IsAnyListElement(parentElement) ||
!HTMLEditUtils::IsEmptyNode(
*parentElement,
{EmptyCheckOption::TreatNonEditableContentAsInvisible})) {
return DeleteRangeResult::IgnoredResult();
}
const nsCOMPtr<nsINode> nextSibling =
mEmptyInclusiveAncestorBlockElement->GetNextSibling();
nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(
MOZ_KnownLive(*mEmptyInclusiveAncestorBlockElement));
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return Err(rv);
}
if (NS_WARN_IF(nextSibling &&
nextSibling->GetParentNode() != parentElement) ||
NS_WARN_IF(!parentElement->IsInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
const auto pointAtDeletedNode = nextSibling
? EditorDOMPoint(nextSibling)
: EditorDOMPoint::AtEndOf(*parentElement);
auto deleteNodeResult =
DeleteRangeResult(EditorDOMRange(pointAtDeletedNode), EditorDOMPoint());
AutoTrackDOMDeleteRangeResult trackDeleteNodeResult(
aHTMLEditor.RangeUpdaterRef(), &deleteNodeResult);
Result<CreateElementResult, nsresult> insertListItemResultOrError =
aHTMLEditor.CreateAndInsertElement(
WithTransaction::Yes,
parentElement->IsHTMLElement(nsGkAtoms::dl) ? *nsGkAtoms::dd
: *nsGkAtoms::li,
pointAtDeletedNode,
[](HTMLEditor& aHTMLEditor, Element& aNewElement,
const EditorDOMPoint& aPointToInsert) -> nsresult {
RefPtr<Element> brElement =
aHTMLEditor.CreateHTMLContent(nsGkAtoms::br);
if (MOZ_UNLIKELY(!brElement)) {
NS_WARNING(
"EditorBase::CreateHTMLContent(nsGkAtoms::br) failed, but "
"ignored");
return NS_OK; // Just gives up to insert <br>
}
IgnoredErrorResult error;
aNewElement.AppendChild(*brElement, error);
NS_WARNING_ASSERTION(!error.Failed(),
"nsINode::AppendChild() failed, but ignored");
return NS_OK;
});
if (MOZ_UNLIKELY(insertListItemResultOrError.isErr())) {
NS_WARNING("HTMLEditor::CreateAndInsertElement() failed");
deleteNodeResult.IgnoreCaretPointSuggestion();
return insertListItemResultOrError.propagateErr();
}
trackDeleteNodeResult.FlushAndStopTracking();
CreateElementResult insertListItemResult =
insertListItemResultOrError.unwrap();
insertListItemResult.IgnoreCaretPointSuggestion();
deleteNodeResult |=
CaretPoint(EditorDOMPoint(insertListItemResult.GetNewNode(), 0u));
MOZ_ASSERT(deleteNodeResult.Handled());
return std::move(deleteNodeResult);
}
template <typename EditorDOMRangeType>
Result<EditorRawDOMRange, nsresult>
HTMLEditor::AutoDeleteRangesHandler::ExtendOrShrinkRangeToDelete(
const HTMLEditor& aHTMLEditor,
const LimitersAndCaretData& aLimitersAndCaretData,
const EditorDOMRangeType& aRangeToDelete) const {
MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable());
MOZ_ASSERT(!aRangeToDelete.Collapsed());
MOZ_ASSERT(aRangeToDelete.IsPositioned());
const nsIContent* commonAncestor = nsIContent::FromNodeOrNull(
nsContentUtils::GetClosestCommonInclusiveAncestor(
aRangeToDelete.StartRef().GetContainer(),
aRangeToDelete.EndRef().GetContainer()));
if (MOZ_UNLIKELY(NS_WARN_IF(!commonAncestor))) {
return Err(NS_ERROR_FAILURE);
}
// Editing host may be nested and outer one could have focus. Let's use
// the closest editing host instead.
const RefPtr<Element> closestEditingHost =
aHTMLEditor.ComputeEditingHost(*commonAncestor, LimitInBodyElement::No);
if (NS_WARN_IF(!closestEditingHost)) {
return Err(NS_ERROR_FAILURE);
}
// Look for the common ancestor's block element in the editing host. It's
// fine that we get non-editable block element which is ancestor of inline
// editing host because the following code checks editing host too.
const RefPtr<Element> closestBlockAncestorOrInlineEditingHost = [&]() {
// Note that if non-closest editing host has focus, found block may be
// non-editable.
if (Element* const maybeEditableBlockElement =
HTMLEditUtils::GetInclusiveAncestorElement(
*commonAncestor, HTMLEditUtils::ClosestBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle,
closestEditingHost)) {
return maybeEditableBlockElement;
}
return closestEditingHost.get();
}();
// Set up for loops and cache our root element
// If only one list element is selected, and if the list element is empty,
// we should delete only the list element. Or if the list element is not
// empty, we should make the list has only one empty list item element.
if (const Element* maybeListElement =
HTMLEditUtils::GetElementIfOnlyOneSelected(aRangeToDelete)) {
if (HTMLEditUtils::IsAnyListElement(maybeListElement) &&
!HTMLEditUtils::IsEmptyAnyListElement(*maybeListElement)) {
EditorRawDOMRange range =
HTMLEditUtils::GetRangeSelectingAllContentInAllListItems<
EditorRawDOMRange>(*maybeListElement);
if (range.IsPositioned()) {
if (EditorUtils::IsEditableContent(
*range.StartRef().ContainerAs<nsIContent>(),
EditorType::HTML) &&
EditorUtils::IsEditableContent(
*range.EndRef().ContainerAs<nsIContent>(), EditorType::HTML)) {
return range;
}
}
// If the first and/or last list item is not editable, we need to do more
// complicated things probably, but we just delete the list element with
// invisible things around it for now since it must be rare case.
}
// Otherwise, if the list item is empty, we should delete it with invisible
// things around it.
}
// Find previous visible things before start of selection
EditorRawDOMRange rangeToDelete(aRangeToDelete);
if (rangeToDelete.StartRef().GetContainer() !=
closestBlockAncestorOrInlineEditingHost) {
for (;;) {
const WSScanResult backwardScanFromStartResult =
WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary(
WSRunScanner::Scan::EditableNodes, rangeToDelete.StartRef(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (!backwardScanFromStartResult.ReachedCurrentBlockBoundary() &&
!backwardScanFromStartResult.ReachedInlineEditingHostBoundary()) {
break;
}
MOZ_ASSERT(backwardScanFromStartResult.GetContent() ==
WSRunScanner(WSRunScanner::Scan::EditableNodes,
rangeToDelete.StartRef(),
BlockInlineCheck::UseComputedDisplayOutsideStyle)
.GetStartReasonContent());
// We want to keep looking up. But stop if we are crossing table
// element boundaries, or if we hit the root.
if (HTMLEditUtils::IsAnyTableElement(
backwardScanFromStartResult.GetContent()) ||
backwardScanFromStartResult.GetContent() ==
closestBlockAncestorOrInlineEditingHost ||
backwardScanFromStartResult.GetContent() == closestEditingHost) {
break;
}
// Don't cross list element boundary because we don't want to delete list
// element at start position unless it's empty.
if (HTMLEditUtils::IsAnyListElement(
backwardScanFromStartResult.GetContent()) &&
!HTMLEditUtils::IsEmptyAnyListElement(
*backwardScanFromStartResult.ElementPtr())) {
break;
}
// Don't cross flex-item/grid-item boundary to make new content inserted
// into it.
if (backwardScanFromStartResult.ContentIsElement() &&
HTMLEditUtils::IsFlexOrGridItem(
*backwardScanFromStartResult.ElementPtr())) {
break;
}
rangeToDelete.SetStart(backwardScanFromStartResult
.PointAtReachedContent<EditorRawDOMPoint>());
}
if (!aLimitersAndCaretData.NodeIsInLimiters(
rangeToDelete.StartRef().GetContainer())) {
NS_WARNING("Computed start container was out of selection limiter");
return Err(NS_ERROR_FAILURE);
}
}
// Expand selection endpoint only if we don't pass an invisible `<br>`, or if
// we really needed to pass that `<br>` (i.e., its block is now totally
// selected).
// Find next visible things after end of selection
EditorDOMPoint atFirstInvisibleBRElement;
if (rangeToDelete.EndRef().GetContainer() !=
closestBlockAncestorOrInlineEditingHost) {
for (;;) {
const WSRunScanner wsScannerAtEnd(
WSRunScanner::Scan::EditableNodes, rangeToDelete.EndRef(),
BlockInlineCheck::UseComputedDisplayOutsideStyle);
const WSScanResult forwardScanFromEndResult =
wsScannerAtEnd.ScanInclusiveNextVisibleNodeOrBlockBoundaryFrom(
rangeToDelete.EndRef());
if (forwardScanFromEndResult.ReachedBRElement()) {
// XXX In my understanding, this is odd. The end reason may not be
// same as the reached <br> element because the equality is
// guaranteed only when ReachedCurrentBlockBoundary() returns true.
// However, looks like that this code assumes that
// GetEndReasonContent() returns the (or a) <br> element.
NS_ASSERTION(wsScannerAtEnd.GetEndReasonContent() ==
forwardScanFromEndResult.BRElementPtr(),
"End reason is not the reached <br> element");
if (HTMLEditUtils::IsVisibleBRElement(
*wsScannerAtEnd.GetEndReasonContent())) {
break;
}
if (!atFirstInvisibleBRElement.IsSet()) {
atFirstInvisibleBRElement =
rangeToDelete.EndRef().To<EditorDOMPoint>();
}
rangeToDelete.SetEnd(
EditorRawDOMPoint::After(*wsScannerAtEnd.GetEndReasonContent()));
continue;
}
if (forwardScanFromEndResult.ReachedCurrentBlockBoundary() ||
forwardScanFromEndResult.ReachedInlineEditingHostBoundary()) {
MOZ_ASSERT(forwardScanFromEndResult.ContentIsElement());
MOZ_ASSERT(forwardScanFromEndResult.GetContent() ==
wsScannerAtEnd.GetEndReasonContent());
// We want to keep looking up. But stop if we are crossing table
// element boundaries, or if we hit the root.
if (HTMLEditUtils::IsAnyTableElement(
forwardScanFromEndResult.GetContent()) ||
forwardScanFromEndResult.GetContent() ==
closestBlockAncestorOrInlineEditingHost) {
break;
}
// Don't cross flex-item/grid-item boundary to make new content inserted
// into it.
if (HTMLEditUtils::IsFlexOrGridItem(
*forwardScanFromEndResult.ElementPtr())) {
break;
}
rangeToDelete.SetEnd(
forwardScanFromEndResult
.PointAfterReachedContent<EditorRawDOMPoint>());
continue;
}
break;
}
if (!aLimitersAndCaretData.NodeIsInLimiters(
rangeToDelete.EndRef().GetContainer())) {
NS_WARNING("Computed end container was out of selection limiter");
return Err(NS_ERROR_FAILURE);
}
}
// If range boundaries are in list element, and the positions are very
// start/end of first/last list item, we may need to shrink the ranges for
// preventing to remove only all list item elements.
{
EditorRawDOMRange rangeToDeleteListOrLeaveOneEmptyListItem =
AutoDeleteRangesHandler::
GetRangeToAvoidDeletingAllListItemsIfSelectingAllOverListElements(
rangeToDelete);
if (rangeToDeleteListOrLeaveOneEmptyListItem.IsPositioned()) {
rangeToDelete = std::move(rangeToDeleteListOrLeaveOneEmptyListItem);
}
}
if (atFirstInvisibleBRElement.IsInContentNode()) {
// Find block node containing invisible `<br>` element.
if (const RefPtr<const Element> editableBlockContainingBRElement =
HTMLEditUtils::GetInclusiveAncestorElement(
*atFirstInvisibleBRElement.ContainerAs<nsIContent>(),
HTMLEditUtils::ClosestEditableBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle)) {
if (rangeToDelete.Contains(
EditorRawDOMPoint(editableBlockContainingBRElement))) {
return rangeToDelete;
}
// Otherwise, the new range should end at the invisible `<br>`.
if (!aLimitersAndCaretData.NodeIsInLimiters(
atFirstInvisibleBRElement.GetContainer())) {
NS_WARNING(
"Computed end container (`<br>` element) was out of selection "
"limiter");
return Err(NS_ERROR_FAILURE);
}
rangeToDelete.SetEnd(atFirstInvisibleBRElement);
}
}
return rangeToDelete;
}
// static
EditorRawDOMRange HTMLEditor::AutoDeleteRangesHandler::
GetRangeToAvoidDeletingAllListItemsIfSelectingAllOverListElements(
const EditorRawDOMRange& aRangeToDelete) {
MOZ_ASSERT(aRangeToDelete.IsPositionedAndValid());
auto GetDeepestEditableStartPointOfList = [](Element& aListElement) {
Element* const firstListItemElement =
HTMLEditUtils::GetFirstListItemElement(aListElement);
if (MOZ_UNLIKELY(!firstListItemElement)) {
return EditorRawDOMPoint();
}
if (MOZ_UNLIKELY(!EditorUtils::IsEditableContent(*firstListItemElement,
EditorType::HTML))) {
return EditorRawDOMPoint(firstListItemElement);
}
return HTMLEditUtils::GetDeepestEditableStartPointOf<EditorRawDOMPoint>(
*firstListItemElement);
};
auto GetDeepestEditableEndPointOfList = [](Element& aListElement) {
Element* const lastListItemElement =
HTMLEditUtils::GetLastListItemElement(aListElement);
if (MOZ_UNLIKELY(!lastListItemElement)) {
return EditorRawDOMPoint();
}
if (MOZ_UNLIKELY(!EditorUtils::IsEditableContent(*lastListItemElement,
EditorType::HTML))) {
return EditorRawDOMPoint::After(*lastListItemElement);
}
return HTMLEditUtils::GetDeepestEditableEndPointOf<EditorRawDOMPoint>(
*lastListItemElement);
};
Element* const startListElement =
aRangeToDelete.StartRef().IsInContentNode()
? HTMLEditUtils::GetClosestInclusiveAncestorAnyListElement(
*aRangeToDelete.StartRef().ContainerAs<nsIContent>())
: nullptr;
Element* const endListElement =
aRangeToDelete.EndRef().IsInContentNode()
? HTMLEditUtils::GetClosestInclusiveAncestorAnyListElement(
*aRangeToDelete.EndRef().ContainerAs<nsIContent>())
: nullptr;
if (!startListElement && !endListElement) {
return EditorRawDOMRange();
}
// FIXME: If there are invalid children, we cannot handle first/last list item
// elements properly. In that case, we should treat list elements and list
// item elements as normal block elements.
if (startListElement &&
NS_WARN_IF(!HTMLEditUtils::IsValidListElement(
*startListElement, HTMLEditUtils::TreatSubListElementAs::Valid))) {
return EditorRawDOMRange();
}
if (endListElement && startListElement != endListElement &&
NS_WARN_IF(!HTMLEditUtils::IsValidListElement(
*endListElement, HTMLEditUtils::TreatSubListElementAs::Valid))) {
return EditorRawDOMRange();
}
const bool startListElementIsEmpty =
startListElement &&
HTMLEditUtils::IsEmptyAnyListElement(*startListElement);
const bool endListElementIsEmpty =
startListElement == endListElement
? startListElementIsEmpty
: endListElement &&
HTMLEditUtils::IsEmptyAnyListElement(*endListElement);
// If both list elements are empty, we should not shrink the range since
// we want to delete the list.
if (startListElementIsEmpty && endListElementIsEmpty) {
return EditorRawDOMRange();
}
// There may be invisible white-spaces and there are elements in the
// list items. Therefore, we need to compare the deepest positions
// and range boundaries.
EditorRawDOMPoint deepestStartPointOfStartList =
startListElement ? GetDeepestEditableStartPointOfList(*startListElement)
: EditorRawDOMPoint();
EditorRawDOMPoint deepestEndPointOfEndList =
endListElement ? GetDeepestEditableEndPointOfList(*endListElement)
: EditorRawDOMPoint();
if (MOZ_UNLIKELY(!deepestStartPointOfStartList.IsSet() &&
!deepestEndPointOfEndList.IsSet())) {
// FIXME: This does not work well if there is non-list-item contents in the
// list elements. Perhaps, for fixing this invalid cases, we need to wrap
// the content into new list item like Chrome.
return EditorRawDOMRange();
}
// We don't want to shrink the range into empty sublist.
if (deepestStartPointOfStartList.IsSet()) {
for (nsIContent* const maybeList :
deepestStartPointOfStartList.GetContainer()
->InclusiveAncestorsOfType<nsIContent>()) {
if (aRangeToDelete.StartRef().GetContainer() == maybeList) {
break;
}
if (HTMLEditUtils::IsAnyListElement(maybeList) &&
HTMLEditUtils::IsEmptyAnyListElement(*maybeList->AsElement())) {
deepestStartPointOfStartList.Set(maybeList);
}
}
}
if (deepestEndPointOfEndList.IsSet()) {
for (nsIContent* const maybeList :
deepestEndPointOfEndList.GetContainer()
->InclusiveAncestorsOfType<nsIContent>()) {
if (aRangeToDelete.EndRef().GetContainer() == maybeList) {
break;
}
if (HTMLEditUtils::IsAnyListElement(maybeList) &&
HTMLEditUtils::IsEmptyAnyListElement(*maybeList->AsElement())) {
deepestEndPointOfEndList.SetAfter(maybeList);
}
}
}
const EditorRawDOMPoint deepestEndPointOfStartList =
startListElement ? GetDeepestEditableEndPointOfList(*startListElement)
: EditorRawDOMPoint();
MOZ_ASSERT_IF(deepestStartPointOfStartList.IsSet(),
deepestEndPointOfStartList.IsSet());
MOZ_ASSERT_IF(!deepestStartPointOfStartList.IsSet(),
!deepestEndPointOfStartList.IsSet());
const bool rangeStartsFromBeginningOfStartList =
deepestStartPointOfStartList.IsSet() &&
aRangeToDelete.StartRef().EqualsOrIsBefore(deepestStartPointOfStartList);
const bool rangeEndsByEndingOfStartListOrLater =
!deepestEndPointOfStartList.IsSet() ||
deepestEndPointOfStartList.EqualsOrIsBefore(aRangeToDelete.EndRef());
const bool rangeEndsByEndingOfEndList =
deepestEndPointOfEndList.IsSet() &&
deepestEndPointOfEndList.EqualsOrIsBefore(aRangeToDelete.EndRef());
EditorRawDOMRange newRangeToDelete;
// If all over the list element at start boundary is selected, we should
// shrink the range to start from the first list item to avoid to delete
// all list items.
if (!startListElementIsEmpty && rangeStartsFromBeginningOfStartList &&
rangeEndsByEndingOfStartListOrLater) {
newRangeToDelete.SetStart(EditorRawDOMPoint(
deepestStartPointOfStartList.ContainerAs<nsIContent>(), 0u));
}
// If all over the list element at end boundary is selected, and...
if (!endListElementIsEmpty && rangeEndsByEndingOfEndList) {
// If the range starts before the range at end boundary of the range,
// we want to delete the list completely, thus, we should extend the
// range to contain the list element.
if (aRangeToDelete.StartRef().IsBefore(
EditorRawDOMPoint(endListElement, 0u))) {
newRangeToDelete.SetEnd(EditorRawDOMPoint::After(*endListElement));
MOZ_ASSERT_IF(newRangeToDelete.StartRef().IsSet(),
newRangeToDelete.IsPositionedAndValid());
}
// Otherwise, if the range starts in the end list element, we shouldn't
// delete the list. Therefore, we should shrink the range to end by end
// of the last list item element to avoid to delete all list items.
else {
newRangeToDelete.SetEnd(EditorRawDOMPoint::AtEndOf(
*deepestEndPointOfEndList.ContainerAs<nsIContent>()));
MOZ_ASSERT_IF(newRangeToDelete.StartRef().IsSet(),
newRangeToDelete.IsPositionedAndValid());
}
}
if (!newRangeToDelete.StartRef().IsSet() &&
!newRangeToDelete.EndRef().IsSet()) {
return EditorRawDOMRange();
}
if (!newRangeToDelete.StartRef().IsSet()) {
newRangeToDelete.SetStart(aRangeToDelete.StartRef());
MOZ_ASSERT(newRangeToDelete.IsPositionedAndValid());
}
if (!newRangeToDelete.EndRef().IsSet()) {
newRangeToDelete.SetEnd(aRangeToDelete.EndRef());
MOZ_ASSERT(newRangeToDelete.IsPositionedAndValid());
}
return newRangeToDelete;
}
} // namespace mozilla
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