/* -*- 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 #include #include "AutoRangeArray.h" #include "CSSEditUtils.h" #include "EditAction.h" #include "EditorDOMPoint.h" #include "EditorUtils.h" #include "HTMLEditHelpers.h" #include "HTMLEditorInlines.h" #include "HTMLEditUtils.h" #include "WSRunObject.h" #include "ErrorList.h" #include "js/ErrorReport.h" #include "mozilla/Assertions.h" #include "mozilla/CheckedInt.h" #include "mozilla/ComputedStyle.h" // for ComputedStyle #include "mozilla/ContentIterator.h" #include "mozilla/EditorDOMPoint.h" #include "mozilla/EditorForwards.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/HTMLBRElement.h" #include "mozilla/dom/Selection.h" #include "mozilla/mozalloc.h" #include "nsAString.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 HTMLEditor::DeleteTextAndTextNodesWithTransaction( const EditorDOMPoint& aStartPoint, const EditorDOMPoint& aEndPoint, TreatEmptyTextNodes aTreatEmptyTextNodes); template Result HTMLEditor::DeleteTextAndTextNodesWithTransaction( const EditorDOMPointInText& aStartPoint, const EditorDOMPointInText& aEndPoint, TreatEmptyTextNodes aTreatEmptyTextNodes); /***************************************************************************** * AutoSetTemporaryAncestorLimiter ****************************************************************************/ class MOZ_RAII AutoSetTemporaryAncestorLimiter final { public: AutoSetTemporaryAncestorLimiter(const HTMLEditor& aHTMLEditor, Selection& aSelection, nsINode& aStartPointNode, AutoRangeArray* aRanges = nullptr) { MOZ_ASSERT(aSelection.GetType() == SelectionType::eNormal); if (aSelection.GetAncestorLimiter()) { return; } Element* selectionRootElement = aHTMLEditor.FindSelectionRoot(aStartPointNode); if (!selectionRootElement) { return; } aHTMLEditor.InitializeSelectionAncestorLimit(*selectionRootElement); mSelection = &aSelection; // Setting ancestor limiter may change ranges which were outer of // the new limiter. Therefore, we need to reinitialize aRanges. if (aRanges) { aRanges->Initialize(aSelection); } } ~AutoSetTemporaryAncestorLimiter() { if (mSelection) { mSelection->SetAncestorLimiter(nullptr); } } private: RefPtr mSelection; }; /***************************************************************************** * 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, AutoRangeArray& 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 Run( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& aRangesToDelete, const Element& aEditingHost); private: bool IsHandlingRecursively() const { return mParent != nullptr; } bool CanFallbackToDeleteRangesWithTransaction( const AutoRangeArray& 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 HandleDeleteAroundCollapsedRanges( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& aRangesToDelete, const WSRunScanner& aWSRunScannerAtCaret, const WSScanResult& aScanFromCaretPointResult, const Element& aEditingHost); nsresult ComputeRangesToDeleteAroundCollapsedRanges( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& 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 HandleDeleteNonCollapsedRanges(HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& aRangesToDelete, SelectionWasCollapsed aSelectionWasCollapsed, const Element& aEditingHost); nsresult ComputeRangesToDeleteNonCollapsedRanges( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& 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 HandleDeleteTextAroundCollapsedRanges( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete, const Element& aEditingHost); nsresult ComputeRangesToDeleteTextAroundCollapsedRanges( nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete, const Element& aEditingHost) 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 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 HandleDeleteCollapsedSelectionAtVisibleChar( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete, const EditorDOMPoint& aPointAtDeletingChar, const Element& aEditingHost); /** * Handle deletion of atomic elements like
,
, , , etc and * data nodes except text node (e.g., comment node). Note that don't call this * directly with `
` 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 HandleDeleteAtomicContent(HTMLEditor& aHTMLEditor, nsIContent& aAtomicContent, const EditorDOMPoint& aCaretPoint, const WSRunScanner& aWSRunScannerAtCaret, const Element& aEditingHost); nsresult ComputeRangesToDeleteAtomicContent( Element* aEditingHost, const nsIContent& aAtomicContent, AutoRangeArray& 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 HandleDeleteAtOtherBlockBoundary( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, Element& aOtherBlockElement, const EditorDOMPoint& aCaretPoint, WSRunScanner& aWSRunScannerAtCaret, AutoRangeArray& aRangesToDelete, const Element& aEditingHost); /** * ExtendOrShrinkRangeToDelete() extends aRangeToDelete if there are * an invisible
element and/or some parent empty elements. * * @param aFrameSelection If the caller wants range in selection limiter, * set this to non-nullptr which knows the limiter. * @param aRangeToDelete The range to be extended for deletion. This * must not be collapsed, must be positioned. */ template Result ExtendOrShrinkRangeToDelete( const HTMLEditor& aHTMLEditor, const nsFrameSelection* aFrameSelection, const EditorDOMRangeType& aRangeToDelete) const; /** * 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. * Note that aRange is tracked with AutoTrackDOMRange. */ [[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult DeleteUnnecessaryNodes(HTMLEditor& aHTMLEditor, EditorDOMRange& aRange); /** * DeleteUnnecessaryNodesAndCollapseSelection() calls DeleteUnnecessaryNodes() * and then, collapse selection at tracked aSelectionStartPoint or * aSelectionEndPoint (depending on aDirectionAndAmount). * * @param aDirectionAndAmount Direction of the deletion. * If nsIEditor::ePrevious, selection * will be collapsed to aSelectionEndPoint. * Otherwise, selection will be collapsed * to aSelectionStartPoint. * @param aSelectionStartPoint First selection range start after * computing the deleting range. * @param aSelectionEndPoint First selection range end after * computing the deleting range. */ [[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult DeleteUnnecessaryNodesAndCollapseSelection( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, const EditorDOMPoint& aSelectionStartPoint, const EditorDOMPoint& aSelectionEndPoint); /** * 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 FallbackToDeleteRangesWithTransaction(HTMLEditor& aHTMLEditor, AutoRangeArray& aRangesToDelete) const { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(CanFallbackToDeleteRangesWithTransaction(aRangesToDelete)); Result caretPointOrError = aHTMLEditor.DeleteRangesWithTransaction(mOriginalDirectionAndAmount, mOriginalStripWrappers, aRangesToDelete); NS_WARNING_ASSERTION(caretPointOrError.isOk(), "HTMLEditor::DeleteRangesWithTransaction() failed"); return caretPointOrError; } /** * ComputeRangesToDeleteRangesWithTransaction() computes target ranges * which will be called by `EditorBase::DeleteRangesWithTransaction()`. * TODO: We should not use it for consistency with each deletion handler * in this and nested classes. */ nsresult ComputeRangesToDeleteRangesWithTransaction( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete) const; nsresult FallbackToComputeRangesToDeleteRangesWithTransaction( const HTMLEditor& aHTMLEditor, AutoRangeArray& aRangesToDelete) const { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(CanFallbackToDeleteRangesWithTransaction(aRangesToDelete)); nsresult rv = ComputeRangesToDeleteRangesWithTransaction( aHTMLEditor, mOriginalDirectionAndAmount, aRangesToDelete); 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). * @return true if can continue to handle the * deletion. */ bool PrepareToDeleteAtCurrentBlockBoundary( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, Element& aCurrentBlockElement, const EditorDOMPoint& aCaretPoint); /** * 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); /** * PrepareToDeleteNonCollapsedRanges() considers left block element and * right block element which are inclusive ancestor block element of * start and end container of first range of aRangesToDelete. * * @param aHTMLEditor The HTML editor. * @param aRangesToDelete Ranges to delete. Must not be * collapsed. * @return true if can continue to handle the * deletion. */ bool PrepareToDeleteNonCollapsedRanges( const HTMLEditor& aHTMLEditor, const AutoRangeArray& aRangesToDelete); /** * 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 aRangesToDelete Ranges to delete of the caller. * This should be collapsed and match * with aCaretPoint. */ [[nodiscard]] MOZ_CAN_RUN_SCRIPT Result Run( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, const EditorDOMPoint& aCaretPoint, AutoRangeArray& aRangesToDelete, const Element& aEditingHost) { switch (mMode) { case Mode::JoinCurrentBlock: { Result result = HandleDeleteAtCurrentBlockBoundary( aHTMLEditor, aDirectionAndAmount, aCaretPoint, aEditingHost); NS_WARNING_ASSERTION(result.isOk(), "AutoBlockElementsJoiner::" "HandleDeleteAtCurrentBlockBoundary() failed"); return result; } case Mode::JoinOtherBlock: { Result result = HandleDeleteAtOtherBlockBoundary(aHTMLEditor, aDirectionAndAmount, aStripWrappers, aCaretPoint, aRangesToDelete, aEditingHost); NS_WARNING_ASSERTION(result.isOk(), "AutoBlockElementsJoiner::" "HandleDeleteAtOtherBlockBoundary() failed"); return result; } case Mode::DeleteBRElement: { Result result = DeleteBRElement(aHTMLEditor, aDirectionAndAmount, aEditingHost); NS_WARNING_ASSERTION( result.isOk(), "AutoBlockElementsJoiner::DeleteBRElement() failed"); return result; } case Mode::JoinBlocksInSameParent: case Mode::DeleteContentInRanges: case Mode::DeleteNonCollapsedRanges: 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 ComputeRangesToDelete(const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, const EditorDOMPoint& aCaretPoint, AutoRangeArray& aRangesToDelete, const Element& aEditingHost) const { switch (mMode) { case Mode::JoinCurrentBlock: { nsresult rv = ComputeRangesToDeleteAtCurrentBlockBoundary( aHTMLEditor, aCaretPoint, aRangesToDelete, aEditingHost); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoBlockElementsJoiner::" "ComputeRangesToDeleteAtCurrentBlockBoundary() failed"); return rv; } case Mode::JoinOtherBlock: { nsresult rv = ComputeRangesToDeleteAtOtherBlockBoundary( aHTMLEditor, aDirectionAndAmount, aCaretPoint, aRangesToDelete, aEditingHost); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoBlockElementsJoiner::" "ComputeRangesToDeleteAtOtherBlockBoundary() failed"); return rv; } case Mode::DeleteBRElement: { nsresult rv = ComputeRangesToDeleteBRElement(aRangesToDelete); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoBlockElementsJoiner::" "ComputeRangesToDeleteBRElement() failed"); return rv; } case Mode::JoinBlocksInSameParent: case Mode::DeleteContentInRanges: case Mode::DeleteNonCollapsedRanges: 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 aDirectionAndAmount Direction of the deletion. * @param aStripWrappers Whether delete or keep new empty * ancestor elements. * @param aRangesToDelete Ranges 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 Run( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& aRangesToDelete, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed, const Element& aEditingHost) { switch (mMode) { case Mode::JoinCurrentBlock: case Mode::JoinOtherBlock: case Mode::DeleteBRElement: MOZ_ASSERT_UNREACHABLE( "This mode should be handled in the other Run()"); return Err(NS_ERROR_UNEXPECTED); case Mode::JoinBlocksInSameParent: { Result result = JoinBlockElementsInSameParent( aHTMLEditor, aDirectionAndAmount, aStripWrappers, aRangesToDelete, aSelectionWasCollapsed, aEditingHost); NS_WARNING_ASSERTION(result.isOk(), "AutoBlockElementsJoiner::" "JoinBlockElementsInSameParent() failed"); return result; } case Mode::DeleteContentInRanges: { Result result = DeleteContentInRanges(aHTMLEditor, aDirectionAndAmount, aStripWrappers, aRangesToDelete); NS_WARNING_ASSERTION( result.isOk(), "AutoBlockElementsJoiner::DeleteContentInRanges() failed"); return result; } case Mode::DeleteNonCollapsedRanges: { Result result = HandleDeleteNonCollapsedRanges( aHTMLEditor, aDirectionAndAmount, aStripWrappers, aRangesToDelete, 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 ComputeRangesToDelete( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed, const Element& aEditingHost) const { switch (mMode) { case Mode::JoinCurrentBlock: case Mode::JoinOtherBlock: case Mode::DeleteBRElement: MOZ_ASSERT_UNREACHABLE( "This mode should be handled in the other " "ComputeRangesToDelete()"); return NS_ERROR_UNEXPECTED; case Mode::JoinBlocksInSameParent: { nsresult rv = ComputeRangesToJoinBlockElementsInSameParent( aHTMLEditor, aDirectionAndAmount, aRangesToDelete); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoBlockElementsJoiner::" "ComputeRangesToJoinBlockElementsInSameParent() failed"); return rv; } case Mode::DeleteContentInRanges: { nsresult rv = ComputeRangesToDeleteContentInRanges( aHTMLEditor, aDirectionAndAmount, aRangesToDelete); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoBlockElementsJoiner::" "ComputeRangesToDeleteContentInRanges() failed"); return rv; } case Mode::DeleteNonCollapsedRanges: { nsresult rv = ComputeRangesToDeleteNonCollapsedRanges( aHTMLEditor, aDirectionAndAmount, aRangesToDelete, 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 HandleDeleteAtCurrentBlockBoundary( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, const EditorDOMPoint& aCaretPoint, const Element& aEditingHost); nsresult ComputeRangesToDeleteAtCurrentBlockBoundary( const HTMLEditor& aHTMLEditor, const EditorDOMPoint& aCaretPoint, AutoRangeArray& aRangesToDelete, const Element& aEditingHost) const; [[nodiscard]] MOZ_CAN_RUN_SCRIPT Result HandleDeleteAtOtherBlockBoundary(HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, const EditorDOMPoint& aCaretPoint, AutoRangeArray& aRangesToDelete, 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 ComputeRangesToDeleteAtOtherBlockBoundary( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, const EditorDOMPoint& aCaretPoint, AutoRangeArray& aRangesToDelete, const Element& aEditingHost) const; [[nodiscard]] MOZ_CAN_RUN_SCRIPT Result JoinBlockElementsInSameParent( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& aRangesToDelete, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed, const Element& aEditingHost); nsresult ComputeRangesToJoinBlockElementsInSameParent( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete) const; [[nodiscard]] MOZ_CAN_RUN_SCRIPT Result DeleteBRElement(HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, const Element& aEditingHost); nsresult ComputeRangesToDeleteBRElement( AutoRangeArray& aRangesToDelete) const; [[nodiscard]] MOZ_CAN_RUN_SCRIPT Result DeleteContentInRanges(HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& aRangesToDelete); nsresult ComputeRangesToDeleteContentInRanges( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete) const; [[nodiscard]] MOZ_CAN_RUN_SCRIPT Result HandleDeleteNonCollapsedRanges( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& aRangesToDelete, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed, const Element& aEditingHost); nsresult ComputeRangesToDeleteNonCollapsedRanges( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete, 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 JoinNodesDeepWithTransaction(HTMLEditor& aHTMLEditor, nsIContent& aLeftContent, nsIContent& aRightContent); /** * DeleteNodesEntirelyInRangeButKeepTableStructure() removes nodes which are * entirely in aRange. Howevers, 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. * * @return true if inclusive ancestor block elements at * start and end of the range should be joined. */ MOZ_CAN_RUN_SCRIPT Result DeleteNodesEntirelyInRangeButKeepTableStructure( HTMLEditor& aHTMLEditor, nsRange& aRange, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed); bool NeedsToJoinNodesAfterDeleteNodesEntirelyInRangeButKeepTableStructure( const HTMLEditor& aHTMLEditor, const nsTArray>& aArrayOfContents, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed) const; Result ComputeRangesToDeleteNodesEntirelyInRangeButKeepTableStructure( 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 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 nsresult DeleteTextAtStartAndEndOfRange(HTMLEditor& aHTMLEditor, nsRange& aRange); 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; } const EditorDOMPoint& PointRefToPutCaret() const { return mPointToPutCaret; } /** * Prepare for joining inclusive ancestor block elements. When this * returns false, the deletion should be canceled. */ Result 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 aRangesToDelete includes the element * boundaries between joining blocks. If they won't be joined, this * collapses the range to aCaretPoint. */ nsresult ComputeRangesToDelete(const HTMLEditor& aHTMLEditor, const EditorDOMPoint& aCaretPoint, AutoRangeArray& aRangesToDelete) const; /** * Join inclusive ancestor block elements which are found by preceding * Preare() 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 Run( HTMLEditor& aHTMLEditor, const Element& aEditingHost); private: /** * This method returns true when * `MergeFirstLineOfRightBlockElementIntoDescendantLeftBlockElement()`, * `MergeFirstLineOfRightBlockElementIntoAncestorLeftBlockElement()` and * `MergeFirstLineOfRightBlockElementIntoLeftBlockElement()` handle it * with the `if` block of their main blocks. */ 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(); } OwningNonNull mInclusiveDescendantOfLeftBlockElement; OwningNonNull mInclusiveDescendantOfRightBlockElement; RefPtr mLeftBlockElement; RefPtr mRightBlockElement; Maybe mNewListElementTagNameOfRightListElement; EditorDOMPoint mPointContainingTheOtherBlockElement; EditorDOMPoint mPointToPutCaret; RefPtr mPrecedingInvisibleBRElement; bool mCanJoinBlocks; bool mFallbackToDeleteLeafContent; }; // HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: // AutoInclusiveAncestorBlockElementsJoiner enum class Mode { NotInitialized, JoinCurrentBlock, JoinOtherBlock, JoinBlocksInSameParent, DeleteBRElement, DeleteContentInRanges, DeleteNonCollapsedRanges, }; AutoDeleteRangesHandler* mDeleteRangesHandler; const AutoDeleteRangesHandler& mDeleteRangesHandlerConst; nsCOMPtr mLeftContent; nsCOMPtr mRightContent; nsCOMPtr mLeafContentInOtherBlock; // mSkippedInvisibleContents stores all content nodes which are skipped at // scanning mLeftContent and mRightContent. The content nodes should be // removed at deletion. AutoTArray, 8> mSkippedInvisibleContents; RefPtr mBRElement; 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, AutoRangeArray& 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. */ [[nodiscard]] MOZ_CAN_RUN_SCRIPT Result Run( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount); private: /** * MaybeReplaceSubListWithNewListItem() replaces * mEmptyInclusiveAncestorBlockElement with new list item element * (containing
) 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 MaybeReplaceSubListWithNewListItem(HTMLEditor& aHTMLEditor); /** * MaybeInsertBRElementBeforeEmptyListItemElement() inserts a `
` 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 `
` element before the empty list item. */ [[nodiscard]] MOZ_CAN_RUN_SCRIPT Result, nsresult> MaybeInsertBRElementBeforeEmptyListItemElement(HTMLEditor& aHTMLEditor); /** * GetNewCaretPosition() returns new caret position after deleting * `mEmptyInclusiveAncestorBlockElement`. */ [[nodiscard]] Result GetNewCaretPosition( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount) const; RefPtr mEmptyInclusiveAncestorBlockElement; }; // HTMLEditor::AutoDeleteRangesHandler::AutoEmptyBlockAncestorDeleter const AutoDeleteRangesHandler* const mParent; nsIEditor::EDirection mOriginalDirectionAndAmount; nsIEditor::EStripWrappers mOriginalStripWrappers; }; // HTMLEditor::AutoDeleteRangesHandler nsresult HTMLEditor::ComputeTargetRanges( nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& 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 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); } RefPtr 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(); } AutoRangeArray rangesToDelete(SelectionRef()); rangesToDelete.EnsureOnlyEditableRanges(*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 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; } // XXX At here, selection may have no range because of mutation event // listeners can do anything so that we should just return NS_OK instead // of returning error. const auto atNewStartOfSelection = GetFirstSelectionStartPoint(); if (NS_WARN_IF(!atNewStartOfSelection.IsSet())) { return Err(NS_ERROR_FAILURE); } if (atNewStartOfSelection.IsInContentNode()) { nsresult rv = DeleteMostAncestorMailCiteElementIfEmpty( MOZ_KnownLive(*atNewStartOfSelection.ContainerAs())); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::DeleteMostAncestorMailCiteElementIfEmpty() failed"); return Err(rv); } } return EditActionResult::HandledResult(); } nsresult HTMLEditor::AutoDeleteRangesHandler::ComputeRangesToDelete( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& 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), "AutoRangeArray::Collapse() failed"); return rv; } SelectionWasCollapsed selectionWasCollapsed = aRangesToDelete.IsCollapsed() ? SelectionWasCollapsed::Yes : SelectionWasCollapsed::No; if (selectionWasCollapsed == SelectionWasCollapsed::Yes) { const auto startPoint = aRangesToDelete.GetFirstRangeStartPoint(); if (NS_WARN_IF(!startPoint.IsSet())) { return NS_ERROR_FAILURE; } RefPtr editingHost = aHTMLEditor.ComputeEditingHost(); if (NS_WARN_IF(!editingHost)) { return NS_ERROR_FAILURE; } if (startPoint.IsInContentNode()) { AutoEmptyBlockAncestorDeleter deleter; if (deleter.ScanEmptyBlockInclusiveAncestor( aHTMLEditor, *startPoint.ContainerAs())) { nsresult rv = deleter.ComputeTargetRanges( aHTMLEditor, aDirectionAndAmount, *editingHost, 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; } // AutoRangeArray::ExtendAnchorFocusRangeFor() will use `nsFrameSelection` // to extend the range for deletion. But if focus event doesn't receive // yet, ancestor isn't set. So we must set root element of editor to // ancestor temporarily. AutoSetTemporaryAncestorLimiter autoSetter( aHTMLEditor, aHTMLEditor.SelectionRef(), *startPoint.GetContainer(), &aRangesToDelete); Result extendResult = aRangesToDelete.ExtendAnchorFocusRangeFor(aHTMLEditor, aDirectionAndAmount); if (extendResult.isErr()) { NS_WARNING("AutoRangeArray::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 shrunkenResult = aRangesToDelete.ShrinkRangesIfStartFromOrEndAfterAtomicContent( aHTMLEditor, aDirectionAndAmount, AutoRangeArray::IfSelectingOnlyOneAtomicContent::Collapse, editingHost); if (shrunkenResult.isErr()) { NS_WARNING( "AutoRangeArray::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); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoDeleteRangesHandler::" "FallbackToComputeRangesToDeleteRangesWithTransaction() failed"); return rv; } if (aRangesToDelete.IsCollapsed()) { const auto caretPoint = aRangesToDelete.GetFirstRangeStartPoint(); if (MOZ_UNLIKELY(NS_WARN_IF(!caretPoint.IsInContentNode()))) { return NS_ERROR_FAILURE; } if (!EditorUtils::IsEditableContent(*caretPoint.ContainerAs(), EditorType::HTML)) { return NS_SUCCESS_DOM_NO_OPERATION; } WSRunScanner wsRunScannerAtCaret( editingHost, caretPoint, BlockInlineCheck::UseComputedDisplayOutsideStyle); WSScanResult scanFromCaretPointResult = aDirectionAndAmount == nsIEditor::eNext ? wsRunScannerAtCaret.ScanNextVisibleNodeOrBlockBoundaryFrom( caretPoint) : wsRunScannerAtCaret.ScanPreviousVisibleNodeOrBlockBoundaryFrom( caretPoint); if (scanFromCaretPointResult.Failed()) { NS_WARNING( "WSRunScanner::Scan(Next|Previous)VisibleNodeOrBlockBoundaryFrom() " "failed"); return NS_ERROR_FAILURE; } if (!scanFromCaretPointResult.GetContent()) { return NS_SUCCESS_DOM_NO_OPERATION; } if (scanFromCaretPointResult.ReachedBRElement()) { if (scanFromCaretPointResult.BRElementPtr() == wsRunScannerAtCaret.GetEditingHost()) { return NS_OK; } if (!EditorUtils::IsEditableContent( *scanFromCaretPointResult.BRElementPtr(), EditorType::HTML)) { return NS_SUCCESS_DOM_NO_OPERATION; } if (HTMLEditUtils::IsInvisibleBRElement( *scanFromCaretPointResult.BRElementPtr())) { EditorDOMPoint newCaretPosition = aDirectionAndAmount == nsIEditor::eNext ? EditorDOMPoint::After( *scanFromCaretPointResult.BRElementPtr()) : EditorDOMPoint(scanFromCaretPointResult.BRElementPtr()); 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 `
` // element should be selected. if (aRangesToDelete.IsCollapsed()) { nsresult rv = aRangesToDelete.SelectNode( *scanFromCaretPointResult.BRElementPtr()); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoRangeArray::SelectNode() failed"); return rv; } // Otherwise, extend the range to contain the invisible `
` // element. if (EditorRawDOMPoint(scanFromCaretPointResult.BRElementPtr()) .IsBefore( aRangesToDelete .GetFirstRangeStartPoint())) { 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() .IsBefore(EditorRawDOMPoint::After( *scanFromCaretPointResult.BRElementPtr()))) { nsresult rv = aRangesToDelete.FirstRangeRef()->SetStartAndEnd( aRangesToDelete.FirstRangeRef()->StartRef(), EditorRawDOMPoint::After( *scanFromCaretPointResult.BRElementPtr()) .ToRawRangeBoundary()); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "nsRange::SetStartAndEnd() failed"); return rv; } NS_WARNING("Was the invisible `
` 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 HTMLEditor::AutoDeleteRangesHandler::Run( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& 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 // AutoRangeArray::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 // AutoRangeArray::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(); 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())) { Result result = deleter.Run(aHTMLEditor, aDirectionAndAmount); if (MOZ_UNLIKELY(result.isErr()) || result.inspect().Handled()) { NS_WARNING_ASSERTION(result.isOk(), "AutoEmptyBlockAncestorDeleter::Run() failed"); return result; } } 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. // Note that this call modifies `nsFrameSelection` without modifying // `Selection`. However, it does not have problem for now because // it'll be referred by `AutoRangeArray::ExtendAnchorFocusRangeFor()` // before modifying `Selection`. // XXX This looks odd. `ExtendAnchorFocusRangeFor()` will extend // anchor-focus range, but here refers the first range. 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(); } // AutoRangeArray::ExtendAnchorFocusRangeFor() will use `nsFrameSelection` // to extend the range for deletion. But if focus event doesn't receive // yet, ancestor isn't set. So we must set root element of editor to // ancestor temporarily. AutoSetTemporaryAncestorLimiter autoSetter( aHTMLEditor, aHTMLEditor.SelectionRef(), *startPoint.GetContainer(), &aRangesToDelete); // 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 caretPoint; if (aRangesToDelete.IsCollapsed() && !aRangesToDelete.Ranges().IsEmpty()) { caretPoint = Some(aRangesToDelete.GetFirstRangeStartPoint()); if (NS_WARN_IF(!caretPoint.ref().IsInContentNode())) { return Err(NS_ERROR_FAILURE); } } Result extendResult = aRangesToDelete.ExtendAnchorFocusRangeFor(aHTMLEditor, aDirectionAndAmount); if (MOZ_UNLIKELY(extendResult.isErr())) { NS_WARNING("AutoRangeArray::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 shrunkenResult = aRangesToDelete.ShrinkRangesIfStartFromOrEndAfterAtomicContent( aHTMLEditor, aDirectionAndAmount, AutoRangeArray::IfSelectingOnlyOneAtomicContent::Collapse, &aEditingHost); if (MOZ_UNLIKELY(shrunkenResult.isErr())) { NS_WARNING( "AutoRangeArray::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 caretPointOrError = FallbackToDeleteRangesWithTransaction(aHTMLEditor, aRangesToDelete); 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(), EditorType::HTML)) { return EditActionResult::CanceledResult(); } WSRunScanner wsRunScannerAtCaret( &aEditingHost, caretPoint.ref(), BlockInlineCheck::UseComputedDisplayOutsideStyle); WSScanResult scanFromCaretPointResult = aDirectionAndAmount == nsIEditor::eNext ? wsRunScannerAtCaret.ScanNextVisibleNodeOrBlockBoundaryFrom( 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 (!scanFromCaretPointResult.GetContent()) { return EditActionResult::CanceledResult(); } // Short circuit for invisible breaks. delete them and recurse. if (scanFromCaretPointResult.ReachedBRElement()) { if (scanFromCaretPointResult.BRElementPtr() == &aEditingHost) { return EditActionResult::HandledResult(); } if (!EditorUtils::IsEditableContent( *scanFromCaretPointResult.BRElementPtr(), EditorType::HTML)) { return EditActionResult::CanceledResult(); } if (HTMLEditUtils::IsInvisibleBRElement( *scanFromCaretPointResult.BRElementPtr())) { // 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 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); } AutoRangeArray rangesToDelete(caretPoint.ref()); 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 `
` element // for avoiding infinite recursive calls. WSRunScanner wsRunScannerAtCaret( &aEditingHost, caretPoint.ref(), BlockInlineCheck::UseComputedDisplayOutsideStyle); WSScanResult scanFromCaretPointResult = aDirectionAndAmount == nsIEditor::eNext ? wsRunScannerAtCaret .ScanNextVisibleNodeOrBlockBoundaryFrom( 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 (MOZ_UNLIKELY( scanFromCaretPointResult.ReachedInvisibleBRElement())) { return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE); } } AutoDeleteRangesHandler anotherHandler(this); Result result = anotherHandler.Run(aHTMLEditor, aDirectionAndAmount, aStripWrappers, rangesToDelete, aEditingHost); NS_WARNING_ASSERTION( result.isOk(), "Recursive AutoDeleteRangesHandler::Run() failed"); return result; } } Result result = HandleDeleteAroundCollapsedRanges( aHTMLEditor, aDirectionAndAmount, aStripWrappers, aRangesToDelete, wsRunScannerAtCaret, scanFromCaretPointResult, aEditingHost); NS_WARNING_ASSERTION(result.isOk(), "AutoDeleteRangesHandler::" "HandleDeleteAroundCollapsedRanges() failed"); return result; } } Result 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, AutoRangeArray& aRangesToDelete, const WSRunScanner& aWSRunScannerAtCaret, const WSScanResult& aScanFromCaretPointResult, const Element& aEditingHost) const { if (aScanFromCaretPointResult.InCollapsibleWhiteSpaces() || aScanFromCaretPointResult.InNonCollapsibleCharacters() || aScanFromCaretPointResult.ReachedPreformattedLineBreak()) { nsresult rv = aRangesToDelete.Collapse( aScanFromCaretPointResult.Point()); if (MOZ_UNLIKELY(NS_FAILED(rv))) { NS_WARNING("AutoRangeArray::Collapse() failed"); return NS_ERROR_FAILURE; } rv = ComputeRangesToDeleteTextAroundCollapsedRanges( aDirectionAndAmount, aRangesToDelete, aEditingHost); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoDeleteRangesHandler::" "ComputeRangesToDeleteTextAroundCollapsedRanges() failed"); return rv; } if (aScanFromCaretPointResult.ReachedSpecialContent() || aScanFromCaretPointResult.ReachedBRElement() || aScanFromCaretPointResult.ReachedHRElement() || aScanFromCaretPointResult.ReachedNonEditableOtherBlockElement()) { if (aScanFromCaretPointResult.GetContent() == aWSRunScannerAtCaret.GetEditingHost()) { 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( aWSRunScannerAtCaret.GetEditingHost(), *atomicContent, aRangesToDelete); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoDeleteRangesHandler::ComputeRangesToDeleteAtomicContent() failed"); return rv; } if (aScanFromCaretPointResult.ReachedOtherBlockElement()) { if (NS_WARN_IF(!aScanFromCaretPointResult.GetContent()->IsElement())) { return NS_ERROR_FAILURE; } AutoBlockElementsJoiner joiner(*this); if (!joiner.PrepareToDeleteAtOtherBlockBoundary( aHTMLEditor, aDirectionAndAmount, *aScanFromCaretPointResult.ElementPtr(), aWSRunScannerAtCaret.ScanStartRef(), aWSRunScannerAtCaret)) { return NS_SUCCESS_DOM_NO_OPERATION; } nsresult rv = joiner.ComputeRangesToDelete( aHTMLEditor, aDirectionAndAmount, aWSRunScannerAtCaret.ScanStartRef(), aRangesToDelete, aEditingHost); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoBlockElementsJoiner::ComputeRangesToDelete() " "failed (other block boundary)"); return rv; } if (aScanFromCaretPointResult.ReachedCurrentBlockBoundary()) { if (NS_WARN_IF(!aScanFromCaretPointResult.GetContent()->IsElement())) { return NS_ERROR_FAILURE; } AutoBlockElementsJoiner joiner(*this); if (!joiner.PrepareToDeleteAtCurrentBlockBoundary( aHTMLEditor, aDirectionAndAmount, *aScanFromCaretPointResult.ElementPtr(), aWSRunScannerAtCaret.ScanStartRef())) { return NS_SUCCESS_DOM_NO_OPERATION; } nsresult rv = joiner.ComputeRangesToDelete( aHTMLEditor, aDirectionAndAmount, aWSRunScannerAtCaret.ScanStartRef(), aRangesToDelete, aEditingHost); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoBlockElementsJoiner::ComputeRangesToDelete() " "failed (current block boundary)"); return rv; } return NS_OK; } Result HTMLEditor::AutoDeleteRangesHandler::HandleDeleteAroundCollapsedRanges( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& 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(), EditorType::HTML)); if (StaticPrefs::editor_white_space_normalization_blink_compatible()) { if (aScanFromCaretPointResult.InCollapsibleWhiteSpaces() || aScanFromCaretPointResult.InNonCollapsibleCharacters() || aScanFromCaretPointResult.ReachedPreformattedLineBreak()) { nsresult rv = aRangesToDelete.Collapse( aScanFromCaretPointResult.Point()); if (NS_FAILED(rv)) { NS_WARNING("AutoRangeArray::Collapse() failed"); return Err(NS_ERROR_FAILURE); } Result 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 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.GetContent()->IsText())) { return Err(NS_ERROR_FAILURE); } Result caretPointOrError = HandleDeleteCollapsedSelectionAtVisibleChar( aHTMLEditor, aDirectionAndAmount, aRangesToDelete, aScanFromCaretPointResult.Point(), 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 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 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.GetContent()->IsElement())) { return Err(NS_ERROR_FAILURE); } AutoBlockElementsJoiner joiner(*this); if (!joiner.PrepareToDeleteAtOtherBlockBoundary( aHTMLEditor, aDirectionAndAmount, *aScanFromCaretPointResult.ElementPtr(), aWSRunScannerAtCaret.ScanStartRef(), aWSRunScannerAtCaret)) { return EditActionResult::CanceledResult(); } Result result = joiner.Run( aHTMLEditor, aDirectionAndAmount, aStripWrappers, aWSRunScannerAtCaret.ScanStartRef(), aRangesToDelete, aEditingHost); NS_WARNING_ASSERTION( result.isOk(), "AutoBlockElementsJoiner::Run() failed (other block boundary)"); return result; } if (aScanFromCaretPointResult.ReachedCurrentBlockBoundary()) { if (NS_WARN_IF(!aScanFromCaretPointResult.GetContent()->IsElement())) { return Err(NS_ERROR_FAILURE); } AutoBlockElementsJoiner joiner(*this); if (!joiner.PrepareToDeleteAtCurrentBlockBoundary( aHTMLEditor, aDirectionAndAmount, *aScanFromCaretPointResult.ElementPtr(), aWSRunScannerAtCaret.ScanStartRef())) { return EditActionResult::CanceledResult(); } Result result = joiner.Run( aHTMLEditor, aDirectionAndAmount, aStripWrappers, aWSRunScannerAtCaret.ScanStartRef(), aRangesToDelete, aEditingHost); NS_WARNING_ASSERTION( result.isOk(), "AutoBlockElementsJoiner::Run() failed (current block boundary)"); return result; } MOZ_ASSERT_UNREACHABLE("New type of reached content hasn't been handled yet"); return EditActionResult::IgnoredResult(); } nsresult HTMLEditor::AutoDeleteRangesHandler:: ComputeRangesToDeleteTextAroundCollapsedRanges( nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete, const Element& aEditingHost) const { MOZ_ASSERT(aDirectionAndAmount == nsIEditor::eNext || aDirectionAndAmount == nsIEditor::ePrevious); const auto caretPosition = aRangesToDelete.GetFirstRangeStartPoint(); MOZ_ASSERT(caretPosition.IsSetAndValid()); if (MOZ_UNLIKELY(NS_WARN_IF(!caretPosition.IsInContentNode()))) { return NS_ERROR_FAILURE; } EditorDOMRangeInTexts rangeToDelete; if (aDirectionAndAmount == nsIEditor::eNext) { Result result = WSRunScanner::GetRangeInTextNodesToForwardDeleteFrom(caretPosition, aEditingHost); 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 result = WSRunScanner::GetRangeInTextNodesToBackspaceFrom(caretPosition, aEditingHost); 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. } } nsresult rv = aRangesToDelete.SetStartAndEnd(rangeToDelete.StartRef(), rangeToDelete.EndRef()); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoArrayRanges::SetStartAndEnd() failed"); return rv; } Result HTMLEditor::AutoDeleteRangesHandler::HandleDeleteTextAroundCollapsedRanges( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete, const Element& aEditingHost) { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(aDirectionAndAmount == nsIEditor::eNext || aDirectionAndAmount == nsIEditor::ePrevious); nsresult rv = ComputeRangesToDeleteTextAroundCollapsedRanges( aDirectionAndAmount, aRangesToDelete, aEditingHost); 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); } Result caretPointOrError = aHTMLEditor.DeleteTextAndNormalizeSurroundingWhiteSpaces( rangeToDelete.StartRef().AsInText(), rangeToDelete.EndRef().AsInText(), TreatEmptyTextNodes::RemoveAllEmptyInlineAncestors, aDirectionAndAmount == nsIEditor::eNext ? DeleteDirection::Forward : DeleteDirection::Backward); aHTMLEditor.TopLevelEditSubActionDataRef().mDidNormalizeWhitespaces = true; NS_WARNING_ASSERTION( caretPointOrError.isOk(), "HTMLEditor::DeleteTextAndNormalizeSurroundingWhiteSpaces() failed"); return caretPointOrError; } Result 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 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 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}); } const auto newCaretPosition = aHTMLEditor.GetFirstSelectionStartPoint(); if (MOZ_UNLIKELY(!newCaretPosition.IsSet())) { NS_WARNING("There was no selection range"); return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE); } Result caretPointOrError = aHTMLEditor.InsertBRElementIfHardLineIsEmptyAndEndsWithBlockBoundary( newCaretPosition); if (MOZ_UNLIKELY(caretPointOrError.isErr())) { NS_WARNING( "HTMLEditor::InsertBRElementIfHardLineIsEmptyAndEndsWithBlockBoundary()" " failed"); return caretPointOrError; } caretPointOrError.unwrap().MoveCaretPointTo( pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion}); return CaretPoint(std::move(pointToPutCaret)); } Result HTMLEditor::AutoDeleteRangesHandler:: HandleDeleteCollapsedSelectionAtVisibleChar( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& 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 visibleTextNode = *aPointAtDeletingChar.ContainerAs(); 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 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() != visibleTextNode) || NS_WARN_IF(endToDelete.ContainerAs() != 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 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, SuggestCaret::OnlyIfTransactionsAllowedToDoIt}); } // 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); } // 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.) AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(), &pointToPutCaret); Result caretPointOrError = aHTMLEditor.InsertBRElementIfHardLineIsEmptyAndEndsWithBlockBoundary( pointToPutCaret); if (MOZ_UNLIKELY(caretPointOrError.isErr())) { NS_WARNING( "HTMLEditor::InsertBRElementIfHardLineIsEmptyAndEndsWithBlockBoundary()" " failed"); return caretPointOrError.propagateErr(); } trackPointToPutCaret.FlushAndStopTracking(); caretPointOrError.unwrap().MoveCaretPointTo( pointToPutCaret, {SuggestCaret::OnlyIfHasSuggestion}); // 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( Element* aEditingHost, const nsIContent& aAtomicContent, AutoRangeArray& aRangesToDelete) const { EditorDOMRange rangeToDelete = WSRunScanner::GetRangesForDeletingAtomicContent(aEditingHost, aAtomicContent); if (!rangeToDelete.IsPositioned()) { NS_WARNING("WSRunScanner::GetRangeForDeleteAContentNode() failed"); return NS_ERROR_FAILURE; } nsresult rv = aRangesToDelete.SetStartAndEnd(rangeToDelete.StartRef(), rangeToDelete.EndRef()); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoRangeArray::SetStartAndEnd() failed"); return rv; } Result 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 != aWSRunScannerAtCaret.GetEditingHost()); EditorDOMPoint pointToPutCaret = aCaretPoint; { AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(), &pointToPutCaret); Result 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); } } { AutoTrackDOMPoint trackPointToPutCaret(aHTMLEditor.RangeUpdaterRef(), &pointToPutCaret); Result caretPointOrError = aHTMLEditor.InsertBRElementIfHardLineIsEmptyAndEndsWithBlockBoundary( pointToPutCaret); if (MOZ_UNLIKELY(caretPointOrError.isErr())) { NS_WARNING( "HTMLEditor::" "InsertBRElementIfHardLineIsEmptyAndEndsWithBlockBoundary()" " failed"); return caretPointOrError; } trackPointToPutCaret.FlushAndStopTracking(); caretPointOrError.unwrap().MoveCaretPointTo( pointToPutCaret, aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion}); if (NS_WARN_IF(!pointToPutCaret.IsSet())) { return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE); } } return CaretPoint(std::move(pointToPutCaret)); } 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(); } else { mLeafContentInOtherBlock = HTMLEditUtils::GetFirstLeafContent( aOtherBlockElement, {LeafNodeType::OnlyEditableLeafNode}, BlockInlineCheck::Unused, &aOtherBlockElement); mLeftContent = aCaretPoint.GetContainerAs(); mRightContent = mLeafContentInOtherBlock; } // Next to a block. See if we are between the block and a `
`. // If so, we really want to delete the `
`. Else join content at // selection to the block. WSScanResult scanFromCaretResult = aDirectionAndAmount == nsIEditor::eNext ? aWSRunScannerAtCaret.ScanPreviousVisibleNodeOrBlockBoundaryFrom( aCaretPoint) : aWSRunScannerAtCaret.ScanNextVisibleNodeOrBlockBoundaryFrom( aCaretPoint); // If we found a `
` 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:: ComputeRangesToDeleteBRElement(AutoRangeArray& aRangesToDelete) const { MOZ_ASSERT(mBRElement); // XXX Why don't we scan invisible leading white-spaces which follows the // `
` element? nsresult rv = aRangesToDelete.SelectNode(*mBRElement); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoRangeArray::SelectNode() failed"); return rv; } Result HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::DeleteBRElement( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, const Element& aEditingHost) { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(mBRElement); // 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 = [&]() { if (!MayEditActionDeleteAroundCollapsedSelection( aHTMLEditor.GetEditAction())) { return EditorDOMPoint(); } WSRunScanner scanner(&aEditingHost, EditorRawDOMPoint(mBRElement), BlockInlineCheck::UseComputedDisplayOutsideStyle); WSScanResult maybePreviousText = scanner.ScanPreviousVisibleNodeOrBlockBoundaryFrom( EditorRawDOMPoint(mBRElement)); if (maybePreviousText.IsContentEditable() && maybePreviousText.InVisibleOrCollapsibleCharacters() && !HTMLEditor::GetLinkElement(maybePreviousText.TextPtr())) { return maybePreviousText.Point(); } WSScanResult maybeNextText = scanner.ScanNextVisibleNodeOrBlockBoundaryFrom( EditorRawDOMPoint::After(*mBRElement)); if (maybeNextText.IsContentEditable() && maybeNextText.InVisibleOrCollapsibleCharacters()) { return maybeNextText.Point(); } return EditorDOMPoint(); }(); // If we found a `
` element, we should delete it instead of joining the // contents. nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(MOZ_KnownLive(*mBRElement)); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed"); return Err(rv); } 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(!mLeafContentInOtherBlock)) { // XXX This must be odd case. The other block can be empty. return Err(NS_ERROR_FAILURE); } if (pointToPutCaret.IsSet()) { nsresult rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return Err(NS_ERROR_EDITOR_DESTROYED); } if (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("EditorBase::CollapseSelectionTo() failed, but ignored"); } return EditActionResult::HandledResult(); } EditorRawDOMPoint newCaretPosition = HTMLEditUtils::GetGoodCaretPointFor( *mLeafContentInOtherBlock, aDirectionAndAmount); if (MOZ_UNLIKELY(!newCaretPosition.IsSet())) { NS_WARNING("HTMLEditUtils::GetGoodCaretPointFor() failed"); return Err(NS_ERROR_FAILURE); } 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:: ComputeRangesToDeleteAtOtherBlockBoundary( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, const EditorDOMPoint& aCaretPoint, AutoRangeArray& aRangesToDelete, 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.CanFallbackToDeleteRangesWithTransaction( aRangesToDelete)) { nsresult rv = aRangesToDelete.Collapse(aCaretPoint); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoRangeArray::Collapse() failed"); return rv; } nsresult rv = mDeleteRangesHandlerConst .FallbackToComputeRangesToDeleteRangesWithTransaction( aHTMLEditor, aRangesToDelete); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoDeleteRangesHandler::" "FallbackToComputeRangesToDeleteRangesWithTransaction() failed"); return rv; } AutoInclusiveAncestorBlockElementsJoiner joiner(*mLeftContent, *mRightContent); Result 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.ComputeRangesToDelete(aHTMLEditor, aCaretPoint, aRangesToDelete); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoInclusiveAncestorBlockElementsJoiner::ComputeRangesToDelete() " "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 (aRangesToDelete.IsCollapsed() && aRangesToDelete.FocusRef() == newCaretPoint.ToRawRangeBoundary()) { return NS_OK; } // TODO: Stop modifying the `Selection` for computing the targer 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)) { aRangesToDelete.Initialize(aHTMLEditor.SelectionRef()); AutoDeleteRangesHandler anotherHandler(mDeleteRangesHandlerConst); rv = anotherHandler.ComputeRangesToDelete(aHTMLEditor, aDirectionAndAmount, aRangesToDelete, aEditingHost); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "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 HTMLEditor::AutoDeleteRangesHandler:: AutoBlockElementsJoiner::HandleDeleteAtOtherBlockBoundary( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, const EditorDOMPoint& aCaretPoint, AutoRangeArray& aRangesToDelete, 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 `
` element and are not called recursively, // we should call `DeleteRangesWithTransaction()` here. if (!mDeleteRangesHandler->CanFallbackToDeleteRangesWithTransaction( aRangesToDelete)) { return EditActionResult::IgnoredResult(); } Result caretPointOrError = mDeleteRangesHandler->FallbackToDeleteRangesWithTransaction( aHTMLEditor, aRangesToDelete); 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 canJoinThem = joiner.Prepare(aHTMLEditor, aEditingHost); if (MOZ_UNLIKELY(canJoinThem.isErr())) { NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Prepare() failed"); return canJoinThem.propagateErr(); } if (!canJoinThem.inspect()) { 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 EditActionResult::CanceledResult(); } auto result = EditActionResult::IgnoredResult(); EditorDOMPoint pointToPutCaret(aCaretPoint); if (joiner.CanJoinBlocks()) { { AutoTrackDOMPoint tracker(aHTMLEditor.RangeUpdaterRef(), &pointToPutCaret); Result joinResult = joiner.Run(aHTMLEditor, aEditingHost); if (MOZ_UNLIKELY(joinResult.isErr())) { NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Run() failed"); return joinResult; } result |= joinResult.unwrap(); #ifdef DEBUG if (joiner.ShouldDeleteLeafContentInstead()) { NS_ASSERTION( result.Ignored(), "Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` " "returning ignored, but returned not ignored"); } else { NS_ASSERTION( !result.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 (result.Handled() && joiner.PointRefToPutCaret().IsSet()) { nsresult rv = aHTMLEditor.CollapseSelectionTo(joiner.PointRefToPutCaret()); 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 result; } // 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( joiner.PointRefToPutCaret().GetContainer())) { aHTMLEditor.mPendingStylesToApplyToNewContent ->ClearLinkAndItsSpecifiedStyle(); } return result; } } // 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 (result.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 (aRangesToDelete.IsCollapsed() && aRangesToDelete.FocusRef() == newCaretPoint.ToRawRangeBoundary()) { return EditActionResult::CanceledResult(); } nsresult rv = aHTMLEditor.CollapseSelectionTo(newCaretPoint); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::CollapseSelectionTo() failed"); return Err(rv); } AutoRangeArray rangesToDelete(aHTMLEditor.SelectionRef()); AutoDeleteRangesHandler anotherHandler(mDeleteRangesHandler); Result fallbackResult = anotherHandler.Run(aHTMLEditor, aDirectionAndAmount, aStripWrappers, rangesToDelete, aEditingHost); if (MOZ_UNLIKELY(fallbackResult.isErr())) { NS_WARNING("Recursive AutoDeleteRangesHandler::Run() failed"); return fallbackResult; } result |= fallbackResult.unwrap(); return result; } } else { result.MarkAsHandled(); } // 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 result; } bool HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: PrepareToDeleteAtCurrentBlockBoundary( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, Element& aCurrentBlockElement, const EditorDOMPoint& aCaretPoint) { 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; } Element* editingHost = aHTMLEditor.ComputeEditingHost(); if (NS_WARN_IF(!editingHost)) { return false; } auto ScanJoinTarget = [&]() -> nsIContent* { nsIContent* targetContent = aDirectionAndAmount == nsIEditor::ePrevious ? HTMLEditUtils::GetPreviousContent( aCurrentBlockElement, {WalkTreeOption::IgnoreNonEditableNode}, BlockInlineCheck::Unused, editingHost) : HTMLEditUtils::GetNextContent( aCurrentBlockElement, {WalkTreeOption::IgnoreNonEditableNode}, BlockInlineCheck::Unused, editingHost); // 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, editingHost) : HTMLEditUtils::GetNextContent( *targetContent, {WalkTreeOption::StopAtBlockBoundary}, BlockInlineCheck::UseComputedDisplayOutsideStyle, editingHost); adjacentContent; adjacentContent = aDirectionAndAmount == nsIEditor::ePrevious ? HTMLEditUtils::GetPreviousContent( *adjacentContent, {WalkTreeOption::StopAtBlockBoundary}, BlockInlineCheck::UseComputedDisplayOutsideStyle, editingHost) : HTMLEditUtils::GetNextContent( *adjacentContent, {WalkTreeOption::StopAtBlockBoundary}, BlockInlineCheck::UseComputedDisplayOutsideStyle, editingHost)) { // 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) { mLeftContent = ScanJoinTarget(); mRightContent = aCaretPoint.GetContainerAs(); } else { mRightContent = ScanJoinTarget(); mLeftContent = aCaretPoint.GetContainerAs(); } // Nothing to join if (!mLeftContent || !mRightContent) { return false; } // Don't cross table boundaries. return HTMLEditUtils::GetInclusiveAncestorAnyTableElement(*mLeftContent) == HTMLEditUtils::GetInclusiveAncestorAnyTableElement(*mRightContent); } nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: ComputeRangesToDeleteAtCurrentBlockBoundary( const HTMLEditor& aHTMLEditor, const EditorDOMPoint& aCaretPoint, AutoRangeArray& aRangesToDelete, const Element& aEditingHost) const { MOZ_ASSERT(mLeftContent); MOZ_ASSERT(mRightContent); AutoInclusiveAncestorBlockElementsJoiner joiner(*mLeftContent, *mRightContent); Result canJoinThem = joiner.Prepare(aHTMLEditor, aEditingHost); if (canJoinThem.isErr()) { NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Prepare() failed"); return canJoinThem.unwrapErr(); } if (canJoinThem.inspect()) { nsresult rv = joiner.ComputeRangesToDelete(aHTMLEditor, aCaretPoint, aRangesToDelete); 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 = aRangesToDelete.Collapse(aCaretPoint); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoRangeArray::Collapse() failed"); return rv; } Result 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 canJoinThem = joiner.Prepare(aHTMLEditor, aEditingHost); if (MOZ_UNLIKELY(canJoinThem.isErr())) { NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Prepare() failed"); return Err(canJoinThem.unwrapErr()); } if (!canJoinThem.inspect()) { 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 EditActionResult::CanceledResult(); } EditActionResult result = EditActionResult::IgnoredResult(); EditorDOMPoint pointToPutCaret(aCaretPoint); if (joiner.CanJoinBlocks()) { AutoTrackDOMPoint tracker(aHTMLEditor.RangeUpdaterRef(), &pointToPutCaret); Result joinResult = joiner.Run(aHTMLEditor, aEditingHost); if (MOZ_UNLIKELY(joinResult.isErr())) { NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Run() failed"); return joinResult; } result |= joinResult.unwrap(); #ifdef DEBUG if (joiner.ShouldDeleteLeafContentInstead()) { NS_ASSERTION(result.Ignored(), "Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` " "returning ignored, but returned not ignored"); } else { NS_ASSERTION(!result.Ignored(), "Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` " "returning handled, but returned ignored"); } #endif // #ifdef DEBUG // Cleaning up invisible nodes which are skipped at scanning mLeftContent or // mRightContent. for (const OwningNonNull& content : mSkippedInvisibleContents) { nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(MOZ_KnownLive(content)); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed"); return Err(rv); } } mSkippedInvisibleContents.Clear(); // 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 (result.Handled() && joiner.PointRefToPutCaret().IsSet()) { nsresult rv = aHTMLEditor.CollapseSelectionTo(joiner.PointRefToPutCaret()); 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 result; } // 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( joiner.PointRefToPutCaret().GetContainer())) { aHTMLEditor.mPendingStylesToApplyToNewContent ->ClearLinkAndItsSpecifiedStyle(); } return result; } } // 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. result.MarkAsHandled(); 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 result; } nsresult HTMLEditor::AutoDeleteRangesHandler::ComputeRangesToDeleteNonCollapsedRanges( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& 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) { nsFrameSelection* frameSelection = aHTMLEditor.SelectionRef().GetFrameSelection(); if (NS_WARN_IF(!frameSelection)) { return NS_ERROR_FAILURE; } Result result = ExtendOrShrinkRangeToDelete( aHTMLEditor, frameSelection, 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( aHTMLEditor.ComputeEditingHost(), 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); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoDeleteRangesHandler::ComputeRangesToDeleteRangesWithTransaction(" ") failed"); return rv; } // `DeleteUnnecessaryNodesAndCollapseSelection()` 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; } AutoBlockElementsJoiner joiner(*this); if (!joiner.PrepareToDeleteNonCollapsedRanges(aHTMLEditor, aRangesToDelete)) { return NS_ERROR_FAILURE; } nsresult rv = joiner.ComputeRangesToDelete( aHTMLEditor, aDirectionAndAmount, aRangesToDelete, aSelectionWasCollapsed, aEditingHost); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoBlockElementsJoiner::ComputeRangesToDelete() failed"); return rv; } Result HTMLEditor::AutoDeleteRangesHandler::HandleDeleteNonCollapsedRanges( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& 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) { nsFrameSelection* frameSelection = aHTMLEditor.SelectionRef().GetFrameSelection(); if (NS_WARN_IF(!frameSelection)) { return Err(NS_ERROR_FAILURE); } Result result = ExtendOrShrinkRangeToDelete( aHTMLEditor, frameSelection, 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()); 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()) { { AutoTrackDOMRange firstRangeTracker(aHTMLEditor.RangeUpdaterRef(), &aRangesToDelete.FirstRangeRef()); Result 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(); } 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()) { { AutoTrackDOMRange firstRangeTracker(aHTMLEditor.RangeUpdaterRef(), &aRangesToDelete.FirstRangeRef()); Result caretPointOrError = aHTMLEditor.DeleteRangesWithTransaction( aDirectionAndAmount, aStripWrappers, aRangesToDelete); if (MOZ_UNLIKELY(caretPointOrError.isErr())) { NS_WARNING("EditorBase::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(!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( "EditorBase::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. nsresult rv = DeleteUnnecessaryNodesAndCollapseSelection( aHTMLEditor, aDirectionAndAmount, EditorDOMPoint(aRangesToDelete.FirstRangeRef()->StartRef()), EditorDOMPoint(aRangesToDelete.FirstRangeRef()->EndRef())); if (NS_FAILED(rv)) { NS_WARNING( "AutoDeleteRangesHandler::DeleteUnnecessaryNodesAndCollapseSelection(" ") 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 startCiteNode = aHTMLEditor.GetMostDistantAncestorMailCiteElement( *aRangesToDelete.FirstRangeRef()->GetStartContainer()); RefPtr 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; } AutoBlockElementsJoiner joiner(*this); if (!joiner.PrepareToDeleteNonCollapsedRanges(aHTMLEditor, aRangesToDelete)) { return Err(NS_ERROR_FAILURE); } Result result = joiner.Run(aHTMLEditor, aDirectionAndAmount, aStripWrappers, aRangesToDelete, aSelectionWasCollapsed, aEditingHost); NS_WARNING_ASSERTION(result.isOk(), "AutoBlockElementsJoiner::Run() failed"); return result; } bool HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: PrepareToDeleteNonCollapsedRanges(const HTMLEditor& aHTMLEditor, const AutoRangeArray& aRangesToDelete) { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(!aRangesToDelete.IsCollapsed()); mLeftContent = HTMLEditUtils::GetInclusiveAncestorElement( *aRangesToDelete.FirstRangeRef()->GetStartContainer()->AsContent(), HTMLEditUtils::ClosestEditableBlockElement, BlockInlineCheck::UseComputedDisplayOutsideStyle); mRightContent = HTMLEditUtils::GetInclusiveAncestorElement( *aRangesToDelete.FirstRangeRef()->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, aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->AsContent() ->GetEditingHost() == aRangesToDelete.FirstRangeRef() ->GetEndContainer() ->AsContent() ->GetEditingHost()); mMode = Mode::DeleteContentInRanges; 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; } mMode = Mode::DeleteNonCollapsedRanges; return true; } nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: ComputeRangesToDeleteContentInRanges( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete) const { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(!aRangesToDelete.IsCollapsed()); MOZ_ASSERT(mMode == Mode::DeleteContentInRanges); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->AsContent() ->GetEditingHost()); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->AsContent() ->GetEditingHost() == aRangesToDelete.FirstRangeRef() ->GetEndContainer() ->AsContent() ->GetEditingHost()); MOZ_ASSERT(!mLeftContent == !mRightContent); MOZ_ASSERT_IF(mLeftContent, mLeftContent->IsElement()); MOZ_ASSERT_IF(mLeftContent, aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->IsInclusiveDescendantOf(mLeftContent)); MOZ_ASSERT_IF(mRightContent, mRightContent->IsElement()); MOZ_ASSERT_IF(mRightContent, aRangesToDelete.FirstRangeRef() ->GetEndContainer() ->IsInclusiveDescendantOf(mRightContent)); MOZ_ASSERT_IF(!mLeftContent, HTMLEditUtils::IsInlineContent( *aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->AsContent() ->GetEditingHost(), BlockInlineCheck::UseComputedDisplayOutsideStyle)); nsresult rv = mDeleteRangesHandlerConst.ComputeRangesToDeleteRangesWithTransaction( aHTMLEditor, aDirectionAndAmount, aRangesToDelete); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoDeleteRangesHandler::" "ComputeRangesToDeleteRangesWithTransaction() failed"); return rv; } Result HTMLEditor::AutoDeleteRangesHandler:: AutoBlockElementsJoiner::DeleteContentInRanges( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& aRangesToDelete) { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(!aRangesToDelete.IsCollapsed()); MOZ_ASSERT(mMode == Mode::DeleteContentInRanges); MOZ_ASSERT(mDeleteRangesHandler); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->AsContent() ->GetEditingHost()); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->AsContent() ->GetEditingHost() == aRangesToDelete.FirstRangeRef() ->GetEndContainer() ->AsContent() ->GetEditingHost()); MOZ_ASSERT_IF(mLeftContent, mLeftContent->IsElement()); MOZ_ASSERT_IF(mLeftContent, aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->IsInclusiveDescendantOf(mLeftContent)); MOZ_ASSERT_IF(mRightContent, mRightContent->IsElement()); MOZ_ASSERT_IF(mRightContent, aRangesToDelete.FirstRangeRef() ->GetEndContainer() ->IsInclusiveDescendantOf(mRightContent)); MOZ_ASSERT_IF(!mLeftContent, HTMLEditUtils::IsInlineContent( *aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->AsContent() ->GetEditingHost(), BlockInlineCheck::UseComputedDisplayOutsideStyle)); // XXX This is also odd. We do we simply use // `DeleteRangesWithTransaction()` only when **first** range is in // same block? { AutoTrackDOMRange firstRangeTracker(aHTMLEditor.RangeUpdaterRef(), &aRangesToDelete.FirstRangeRef()); Result caretPointOrError = aHTMLEditor.DeleteRangesWithTransaction( aDirectionAndAmount, aStripWrappers, aRangesToDelete); if (MOZ_UNLIKELY(caretPointOrError.isErr())) { if (NS_WARN_IF(caretPointOrError.inspectErr() == NS_ERROR_EDITOR_DESTROYED)) { return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING( "EditorBase::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(!aRangesToDelete.FirstRangeRef()->IsPositioned())) { return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE); } nsresult rv = mDeleteRangesHandler->DeleteUnnecessaryNodesAndCollapseSelection( aHTMLEditor, aDirectionAndAmount, EditorDOMPoint(aRangesToDelete.FirstRangeRef()->StartRef()), EditorDOMPoint(aRangesToDelete.FirstRangeRef()->EndRef())); if (NS_FAILED(rv)) { NS_WARNING( "AutoDeleteRangesHandler::DeleteUnnecessaryNodesAndCollapseSelection() " "failed"); return Err(rv); } return EditActionResult::HandledResult(); } nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: ComputeRangesToJoinBlockElementsInSameParent( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete) const { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(!aRangesToDelete.IsCollapsed()); MOZ_ASSERT(mMode == Mode::JoinBlocksInSameParent); MOZ_ASSERT(mLeftContent); MOZ_ASSERT(mLeftContent->IsElement()); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->IsInclusiveDescendantOf(mLeftContent)); MOZ_ASSERT(mRightContent); MOZ_ASSERT(mRightContent->IsElement()); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetEndContainer() ->IsInclusiveDescendantOf(mRightContent)); MOZ_ASSERT(mLeftContent->GetParentNode() == mRightContent->GetParentNode()); nsresult rv = mDeleteRangesHandlerConst.ComputeRangesToDeleteRangesWithTransaction( aHTMLEditor, aDirectionAndAmount, aRangesToDelete); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoDeleteRangesHandler::" "ComputeRangesToDeleteRangesWithTransaction() failed"); return rv; } Result HTMLEditor::AutoDeleteRangesHandler:: AutoBlockElementsJoiner::JoinBlockElementsInSameParent( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& aRangesToDelete, SelectionWasCollapsed aSelectionWasCollapsed, const Element& aEditingHost) { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(!aRangesToDelete.IsCollapsed()); MOZ_ASSERT(mMode == Mode::JoinBlocksInSameParent); MOZ_ASSERT(mLeftContent); MOZ_ASSERT(mLeftContent->IsElement()); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->IsInclusiveDescendantOf(mLeftContent)); MOZ_ASSERT(mRightContent); MOZ_ASSERT(mRightContent->IsElement()); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetEndContainer() ->IsInclusiveDescendantOf(mRightContent)); MOZ_ASSERT(mLeftContent->GetParentNode() == mRightContent->GetParentNode()); const bool backspaceInRightBlock = aSelectionWasCollapsed == SelectionWasCollapsed::Yes && nsIEditor::DirectionIsBackspace(aDirectionAndAmount); Result caretPointOrError = aHTMLEditor.DeleteRangesWithTransaction(aDirectionAndAmount, aStripWrappers, aRangesToDelete); if (MOZ_UNLIKELY(caretPointOrError.isErr())) { NS_WARNING("EditorBase::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( *mRightContent); AutoTrackDOMPoint trackStartOfRightContent(aHTMLEditor.RangeUpdaterRef(), &startOfRightContent); Result 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())) { WSRunScanner scanner(&aEditingHost, startOfRightContent, BlockInlineCheck::UseComputedDisplayOutsideStyle); WSScanResult maybePreviousText = scanner.ScanPreviousVisibleNodeOrBlockBoundaryFrom(startOfRightContent); if (maybePreviousText.IsContentEditable() && maybePreviousText.InVisibleOrCollapsibleCharacters()) { nsresult rv = aHTMLEditor.CollapseSelectionTo( maybePreviousText.Point()); 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. rv = aHTMLEditor.CollapseSelectionTo( atFirstChildOfTheLastRightNodeOrError.inspect()); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::CollapseSelectionTo() failed"); return Err(rv); } return EditActionResult::HandledResult(); } Result HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: ComputeRangesToDeleteNodesEntirelyInRangeButKeepTableStructure( const HTMLEditor& aHTMLEditor, nsRange& aRange, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed) const { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); AutoTArray, 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 HTMLEditor::AutoDeleteRangesHandler:: AutoBlockElementsJoiner::DeleteNodesEntirelyInRangeButKeepTableStructure( HTMLEditor& aHTMLEditor, nsRange& aRange, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed) { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); // Build a list of direct child nodes in the range AutoTArray, 10> arrayOfTopChildren; DOMSubtreeIterator iter; nsresult rv = iter.Init(aRange); if (NS_FAILED(rv)) { NS_WARNING("DOMSubtreeIterator::Init() failed"); return Err(rv); } iter.AppendAllNodesToArray(arrayOfTopChildren); // Now that we have the list, delete non-table elements bool needsToJoinLater = NeedsToJoinNodesAfterDeleteNodesEntirelyInRangeButKeepTableStructure( aHTMLEditor, arrayOfTopChildren, aSelectionWasCollapsed); for (auto& content : arrayOfTopChildren) { // XXX After here, the child contents in the array may have been moved // to somewhere or removed. We should handle it. // // MOZ_KnownLive because 'arrayOfTopChildren' is guaranteed to // keep it alive. // // Even with https://bugzilla.mozilla.org/show_bug.cgi?id=1620312 fixed // this might need to stay, because 'arrayOfTopChildren' is not const, // so it's not obvious how to prove via static analysis that it won't // change and release us. nsresult rv = DeleteContentButKeepTableStructure(aHTMLEditor, MOZ_KnownLive(content)); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoBlockElementsJoiner::DeleteContentButKeepTableStructure() failed, " "but ignored"); } return needsToJoinLater; } bool HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: NeedsToJoinNodesAfterDeleteNodesEntirelyInRangeButKeepTableStructure( const HTMLEditor& aHTMLEditor, const nsTArray>& aArrayOfContents, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed) const { // 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& 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; } nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: DeleteTextAtStartAndEndOfRange(HTMLEditor& aHTMLEditor, nsRange& aRange) { EditorDOMPoint rangeStart(aRange.StartRef()); EditorDOMPoint rangeEnd(aRange.EndRef()); if (rangeStart.IsInTextNode() && !rangeStart.IsEndOfContainer()) { // Delete to last character OwningNonNull textNode = *rangeStart.ContainerAs(); Result caretPointOrError = aHTMLEditor.DeleteTextWithTransaction( textNode, rangeStart.Offset(), rangeStart.GetContainer()->Length() - rangeStart.Offset()); if (MOZ_UNLIKELY(caretPointOrError.isErr())) { NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed"); return caretPointOrError.unwrapErr(); } nsresult rv = caretPointOrError.inspect().SuggestCaretPointTo( aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion, SuggestCaret::OnlyIfTransactionsAllowedToDoIt, 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"); } if (rangeEnd.IsInTextNode() && !rangeEnd.IsStartOfContainer()) { // Delete to first character OwningNonNull textNode = *rangeEnd.ContainerAs(); Result caretPointOrError = aHTMLEditor.DeleteTextWithTransaction(textNode, 0, rangeEnd.Offset()); if (MOZ_UNLIKELY(caretPointOrError.isErr())) { NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed"); return caretPointOrError.unwrapErr(); } nsresult rv = caretPointOrError.inspect().SuggestCaretPointTo( aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion, SuggestCaret::OnlyIfTransactionsAllowedToDoIt, 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; } nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: ComputeRangesToDeleteNonCollapsedRanges( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed, const Element& aEditingHost) const { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(!aRangesToDelete.IsCollapsed()); MOZ_ASSERT(mLeftContent); MOZ_ASSERT(mLeftContent->IsElement()); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->IsInclusiveDescendantOf(mLeftContent)); MOZ_ASSERT(mRightContent); MOZ_ASSERT(mRightContent->IsElement()); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetEndContainer() ->IsInclusiveDescendantOf(mRightContent)); for (OwningNonNull& range : aRangesToDelete.Ranges()) { Result result = ComputeRangesToDeleteNodesEntirelyInRangeButKeepTableStructure( aHTMLEditor, range, aSelectionWasCollapsed); if (result.isErr()) { NS_WARNING( "AutoBlockElementsJoiner::" "ComputeRangesToDeleteNodesEntirelyInRangeButKeepTableStructure() " "failed"); return result.unwrapErr(); } if (!result.unwrap()) { return NS_OK; } } AutoInclusiveAncestorBlockElementsJoiner joiner(*mLeftContent, *mRightContent); Result 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.ComputeRangesToDelete(aHTMLEditor, EditorDOMPoint(), aRangesToDelete); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "AutoInclusiveAncestorBlockElementsJoiner::ComputeRangesToDelete() " "failed"); return rv; } Result HTMLEditor::AutoDeleteRangesHandler:: AutoBlockElementsJoiner::HandleDeleteNonCollapsedRanges( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, nsIEditor::EStripWrappers aStripWrappers, AutoRangeArray& aRangesToDelete, AutoDeleteRangesHandler::SelectionWasCollapsed aSelectionWasCollapsed, const Element& aEditingHost) { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(!aRangesToDelete.IsCollapsed()); MOZ_ASSERT(mDeleteRangesHandler); MOZ_ASSERT(mLeftContent); MOZ_ASSERT(mLeftContent->IsElement()); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetStartContainer() ->IsInclusiveDescendantOf(mLeftContent)); MOZ_ASSERT(mRightContent); MOZ_ASSERT(mRightContent->IsElement()); MOZ_ASSERT(aRangesToDelete.FirstRangeRef() ->GetEndContainer() ->IsInclusiveDescendantOf(mRightContent)); const bool backspaceInRightBlock = aSelectionWasCollapsed == SelectionWasCollapsed::Yes && nsIEditor::DirectionIsBackspace(aDirectionAndAmount); // Otherwise, delete every nodes in all ranges, then, clean up something. EditActionResult result = EditActionResult::IgnoredResult(); EditorDOMPoint pointToPutCaret; while (true) { AutoTrackDOMRange firstRangeTracker(aHTMLEditor.RangeUpdaterRef(), &aRangesToDelete.FirstRangeRef()); bool joinInclusiveAncestorBlockElements = true; for (auto& range : aRangesToDelete.Ranges()) { Result deleteResult = DeleteNodesEntirelyInRangeButKeepTableStructure( aHTMLEditor, MOZ_KnownLive(range), aSelectionWasCollapsed); if (MOZ_UNLIKELY(deleteResult.isErr())) { NS_WARNING( "AutoBlockElementsJoiner::" "DeleteNodesEntirelyInRangeButKeepTableStructure() failed"); return deleteResult.propagateErr(); } // XXX Completely odd. Why don't we join blocks around each range? joinInclusiveAncestorBlockElements &= deleteResult.unwrap(); } // Check endpoints for possible text deletion. We can assume that if // text node is found, we can delete to end or to begining as // appropriate, since the case where both sel endpoints in same text // node was already handled (we wouldn't be here) nsresult rv = DeleteTextAtStartAndEndOfRange( aHTMLEditor, MOZ_KnownLive(aRangesToDelete.FirstRangeRef())); if (NS_FAILED(rv)) { NS_WARNING( "AutoBlockElementsJoiner::DeleteTextAtStartAndEndOfRange() failed"); return Err(rv); } if (!joinInclusiveAncestorBlockElements) { break; } AutoInclusiveAncestorBlockElementsJoiner joiner(*mLeftContent, *mRightContent); Result canJoinThem = joiner.Prepare(aHTMLEditor, aEditingHost); if (canJoinThem.isErr()) { NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Prepare() failed"); return canJoinThem.propagateErr(); } // 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. // But if we're not joining then the selection should collapse to the // beginning of the selection if we'redeleting 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. if (aDirectionAndAmount == nsIEditor::eNext) { aDirectionAndAmount = nsIEditor::ePrevious; } else { aDirectionAndAmount = nsIEditor::eNext; } if (!canJoinThem.inspect()) { result.MarkAsCanceled(); break; } if (!joiner.CanJoinBlocks()) { break; } Result joinResult = joiner.Run(aHTMLEditor, aEditingHost); if (MOZ_UNLIKELY(joinResult.isErr())) { NS_WARNING("AutoInclusiveAncestorBlockElementsJoiner::Run() failed"); return joinResult; } result |= joinResult.unwrap(); #ifdef DEBUG if (joiner.ShouldDeleteLeafContentInstead()) { NS_ASSERTION(result.Ignored(), "Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` " "returning ignored, but returned not ignored"); } else { NS_ASSERTION(!result.Ignored(), "Assumed `AutoInclusiveAncestorBlockElementsJoiner::Run()` " "returning handled, but returned ignored"); } #endif // #ifdef DEBUG pointToPutCaret = joiner.PointRefToPutCaret(); break; } // 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 traditional behavior. if (result.Handled() && pointToPutCaret.IsSet()) { EditorDOMRange range(aRangesToDelete.FirstRangeRef()); nsresult rv = mDeleteRangesHandler->DeleteUnnecessaryNodes(aHTMLEditor, range); if (NS_FAILED(rv)) { NS_WARNING("AutoDeleteRangesHandler::DeleteUnnecessaryNodes() failed"); return Err(rv); } rv = aHTMLEditor.CollapseSelectionTo(pointToPutCaret); 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(pointToPutCaret.GetContainer())) { aHTMLEditor.mPendingStylesToApplyToNewContent ->ClearLinkAndItsSpecifiedStyle(); } return result; } nsresult rv = mDeleteRangesHandler->DeleteUnnecessaryNodesAndCollapseSelection( aHTMLEditor, aDirectionAndAmount, EditorDOMPoint(aRangesToDelete.FirstRangeRef()->StartRef()), EditorDOMPoint(aRangesToDelete.FirstRangeRef()->EndRef())); if (NS_FAILED(rv)) { NS_WARNING( "AutoDeleteRangesHandler::DeleteUnnecessaryNodesAndCollapseSelection() " "failed"); return Err(rv); } result.MarkAsHandled(); return result; } nsresult HTMLEditor::AutoDeleteRangesHandler::DeleteUnnecessaryNodes( HTMLEditor& aHTMLEditor, EditorDOMRange& aRange) { MOZ_ASSERT(aHTMLEditor.IsTopLevelEditSubActionDataAvailable()); MOZ_ASSERT(EditorUtils::IsEditableContent( *aRange.StartRef().ContainerAs(), EditorType::HTML)); MOZ_ASSERT(EditorUtils::IsEditableContent( *aRange.EndRef().ContainerAs(), EditorType::HTML)); // 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(aRange.Collapsed() || (aRange.StartRef().GetContainer()->GetNextSibling() == aRange.EndRef().GetContainer() && aRange.StartRef().IsEndOfContainer() && aRange.EndRef().IsStartOfContainer())); AutoTrackDOMRange trackRange(aHTMLEditor.RangeUpdaterRef(), &aRange); nsresult rv = DeleteParentBlocksWithTransactionIfEmpty(aHTMLEditor, aRange.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(!aRange.IsInContentNodes()) || NS_WARN_IF(!EditorUtils::IsEditableContent( *aRange.StartRef().ContainerAs(), EditorType::HTML)) || NS_WARN_IF(!EditorUtils::IsEditableContent( *aRange.EndRef().ContainerAs(), 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(), &aRange); OwningNonNull startContainer = *aRange.StartRef().ContainerAs(); OwningNonNull endContainer = *aRange.EndRef().ContainerAs(); 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 (aRange.InSameContainer() || !EditorUtils::IsEditableContent( *aRange.EndRef().ContainerAs(), EditorType::HTML)) { return NS_OK; } 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"); return NS_OK; } nsresult HTMLEditor::AutoDeleteRangesHandler::DeleteUnnecessaryNodesAndCollapseSelection( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, const EditorDOMPoint& aSelectionStartPoint, const EditorDOMPoint& aSelectionEndPoint) { EditorDOMRange range(aSelectionStartPoint, aSelectionEndPoint); nsresult rv = DeleteUnnecessaryNodes(aHTMLEditor, range); if (NS_FAILED(rv)) { NS_WARNING("AutoDeleteRangesHandler::DeleteUnnecessaryNodes() failed"); return rv; } if (aHTMLEditor.GetEditAction() == EditAction::eDrop || aHTMLEditor.GetEditAction() == EditAction::eDeleteByDrag) { // If we removed parent blocks, Selection should be collapsed at where // the most ancestor empty block has been. // XXX I think that if the range is not in active editing host, we should // not try to collapse selection here. if (aHTMLEditor.TopLevelEditSubActionDataRef() .mDidDeleteEmptyParentBlocks) { nsresult rv = aHTMLEditor.CollapseSelectionTo(range.StartRef()); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::CollapseSelectionTo() failed"); return rv; } } rv = aHTMLEditor.CollapseSelectionTo( aDirectionAndAmount == nsIEditor::ePrevious ? range.EndRef() : range.StartRef()); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::CollapseSelectionTo() failed"); return rv; } 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 editingHost = aHTMLEditor.ComputeEditingHost(); WSRunScanner wsScannerForPoint( editingHost, aPoint, BlockInlineCheck::UseComputedDisplayOutsideStyle); if (!wsScannerForPoint.StartsFromCurrentBlockBoundary()) { // 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 , or , we shouldn't remove it even // becomes empty because removing such element changes the structure of // the . return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND; } // Next, check there is visible contents after the point in current block. WSScanResult forwardScanFromPointResult = wsScannerForPoint.ScanNextVisibleNodeOrBlockBoundaryFrom(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
element because the equality is // guaranteed only when ReachedCurrentBlockBoundary() returns true. // However, looks like that this code assumes that // GetEndReasonContent() returns the (or a)
element. NS_ASSERTION(wsScannerForPoint.GetEndReasonContent() == forwardScanFromPointResult.BRElementPtr(), "End reason is not the reached
element"); // If the
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()) { WSScanResult scanResult = WSRunScanner::ScanNextVisibleNodeOrBlockBoundary( editingHost, EditorRawDOMPoint::After( *wsScannerForPoint.GetEndReasonContent()), BlockInlineCheck::UseComputedDisplayOutsideStyle); if (scanResult.Failed()) { NS_WARNING("WSRunScanner::ScanNextVisibleNodeOrBlockBoundary() failed"); return NS_ERROR_FAILURE; } if (!scanResult.ReachedCurrentBlockBoundary()) { // If we couldn't reach the block's end after the invisible
, // that means that there is visible content. return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND; } } } else if (!forwardScanFromPointResult.ReachedCurrentBlockBoundary()) { // 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::ComputeRangesToDeleteRangesWithTransaction( const HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount, AutoRangeArray& aRangesToDelete) const { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty()); EditorBase::HowToHandleCollapsedRange howToHandleCollapsedRange = EditorBase::HowToHandleCollapsedRangeFor(aDirectionAndAmount); if (NS_WARN_IF(aRangesToDelete.IsCollapsed() && howToHandleCollapsedRange == EditorBase::HowToHandleCollapsedRange::Ignore)) { return NS_ERROR_FAILURE; } auto extendRangeToSelectCharacterForward = [](nsRange& aRange, const EditorRawDOMPointInText& aCaretPoint) -> void { const nsTextFragment& textFragment = aCaretPoint.ContainerAs()->TextFragment(); if (!textFragment.GetLength()) { return; } if (textFragment.IsHighSurrogateFollowedByLowSurrogateAt( aCaretPoint.Offset())) { DebugOnly rvIgnored = aRange.SetStartAndEnd( aCaretPoint.ContainerAs(), aCaretPoint.Offset(), aCaretPoint.ContainerAs(), aCaretPoint.Offset() + 2); NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), "nsRange::SetStartAndEnd() failed"); return; } DebugOnly rvIgnored = aRange.SetStartAndEnd( aCaretPoint.ContainerAs(), aCaretPoint.Offset(), aCaretPoint.ContainerAs(), aCaretPoint.Offset() + 1); NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), "nsRange::SetStartAndEnd() failed"); }; auto extendRangeToSelectCharacterBackward = [](nsRange& aRange, const EditorRawDOMPointInText& aCaretPoint) -> void { if (aCaretPoint.IsStartOfContainer()) { return; } const nsTextFragment& textFragment = aCaretPoint.ContainerAs()->TextFragment(); if (!textFragment.GetLength()) { return; } if (textFragment.IsLowSurrogateFollowingHighSurrogateAt( aCaretPoint.Offset() - 1)) { DebugOnly rvIgnored = aRange.SetStartAndEnd( aCaretPoint.ContainerAs(), aCaretPoint.Offset() - 2, aCaretPoint.ContainerAs(), aCaretPoint.Offset()); NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), "nsRange::SetStartAndEnd() failed"); return; } DebugOnly rvIgnored = aRange.SetStartAndEnd( aCaretPoint.ContainerAs(), aCaretPoint.Offset() - 1, aCaretPoint.ContainerAs(), aCaretPoint.Offset()); NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), "nsRange::SetStartAndEnd() failed"); }; RefPtr editingHost = aHTMLEditor.ComputeEditingHost(); for (OwningNonNull& range : aRangesToDelete.Ranges()) { // If it's not collapsed, `DeleteRangeTransaction::Create()` will be called // with it and `DeleteRangeTransaction` won't modify the range. if (!range->Collapsed()) { continue; } if (howToHandleCollapsedRange == EditorBase::HowToHandleCollapsedRange::Ignore) { continue; } // In the other cases, `EditorBase::CreateTransactionForCollapsedRange()` // will handle the collapsed range. EditorRawDOMPoint caretPoint(range->StartRef()); if (howToHandleCollapsedRange == EditorBase::HowToHandleCollapsedRange::ExtendBackward && caretPoint.IsStartOfContainer()) { nsIContent* previousEditableContent = HTMLEditUtils::GetPreviousContent( *caretPoint.GetContainer(), {WalkTreeOption::IgnoreNonEditableNode}, BlockInlineCheck::Unused, editingHost); if (!previousEditableContent) { continue; } if (!previousEditableContent->IsText()) { IgnoredErrorResult ignoredError; range->SelectNode(*previousEditableContent, ignoredError); NS_WARNING_ASSERTION(!ignoredError.Failed(), "nsRange::SelectNode() failed"); continue; } extendRangeToSelectCharacterBackward( range, EditorRawDOMPointInText::AtEndOf(*previousEditableContent->AsText())); continue; } if (howToHandleCollapsedRange == EditorBase::HowToHandleCollapsedRange::ExtendForward && caretPoint.IsEndOfContainer()) { nsIContent* nextEditableContent = HTMLEditUtils::GetNextContent( *caretPoint.GetContainer(), {WalkTreeOption::IgnoreNonEditableNode}, BlockInlineCheck::Unused, editingHost); if (!nextEditableContent) { continue; } if (!nextEditableContent->IsText()) { IgnoredErrorResult ignoredError; range->SelectNode(*nextEditableContent, ignoredError); NS_WARNING_ASSERTION(!ignoredError.Failed(), "nsRange::SelectNode() failed"); continue; } extendRangeToSelectCharacterForward( range, EditorRawDOMPointInText(nextEditableContent->AsText(), 0)); continue; } if (caretPoint.IsInTextNode()) { if (howToHandleCollapsedRange == EditorBase::HowToHandleCollapsedRange::ExtendBackward) { extendRangeToSelectCharacterBackward( range, EditorRawDOMPointInText(caretPoint.ContainerAs(), caretPoint.Offset())); continue; } extendRangeToSelectCharacterForward( range, EditorRawDOMPointInText(caretPoint.ContainerAs(), caretPoint.Offset())); continue; } nsIContent* editableContent = howToHandleCollapsedRange == EditorBase::HowToHandleCollapsedRange::ExtendBackward ? HTMLEditUtils::GetPreviousContent( caretPoint, {WalkTreeOption::IgnoreNonEditableNode}, BlockInlineCheck::Unused, editingHost) : HTMLEditUtils::GetNextContent( caretPoint, {WalkTreeOption::IgnoreNonEditableNode}, BlockInlineCheck::Unused, editingHost); if (!editableContent) { continue; } while (editableContent && editableContent->IsCharacterData() && !editableContent->Length()) { editableContent = howToHandleCollapsedRange == EditorBase::HowToHandleCollapsedRange::ExtendBackward ? HTMLEditUtils::GetPreviousContent( *editableContent, {WalkTreeOption::IgnoreNonEditableNode}, BlockInlineCheck::Unused, editingHost) : HTMLEditUtils::GetNextContent( *editableContent, {WalkTreeOption::IgnoreNonEditableNode}, BlockInlineCheck::Unused, editingHost); } if (!editableContent) { continue; } if (!editableContent->IsText()) { IgnoredErrorResult ignoredError; range->SelectNode(*editableContent, ignoredError); NS_WARNING_ASSERTION(!ignoredError.Failed(), "nsRange::SelectNode() failed"); continue; } if (howToHandleCollapsedRange == EditorBase::HowToHandleCollapsedRange::ExtendBackward) { extendRangeToSelectCharacterBackward( range, EditorRawDOMPointInText::AtEndOf(*editableContent->AsText())); continue; } extendRangeToSelectCharacterForward( range, EditorRawDOMPointInText(editableContent->AsText(), 0)); } return NS_OK; } template Result 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 editingHost = ComputeEditingHost(); auto DeleteEmptyContentNodeWithTransaction = [this, &aTreatEmptyTextNodes, &editingHost](nsIContent& aContent) MOZ_CAN_RUN_SCRIPT_FOR_DEFINITION -> nsresult { OwningNonNull 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())); if (NS_FAILED(rv)) { NS_WARNING("deleteEmptyContentNodeWithTransaction() failed"); return Err(rv); } return CaretPoint(EditorDOMPoint()); } RefPtr textNode = aStartPoint.template ContainerAs(); Result caretPointOrError = DeleteTextWithTransaction(*textNode, aStartPoint.Offset(), aEndPoint.Offset() - aStartPoint.Offset()); NS_WARNING_ASSERTION(caretPointOrError.isOk(), "HTMLEditor::DeleteTextWithTransaction() failed"); return caretPointOrError; } RefPtr 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, 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& 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())); if (NS_FAILED(rv)) { NS_WARNING("DeleteEmptyContentNodeWithTransaction() failed"); return Err(rv); } continue; } AutoTrackDOMPoint trackPointToPutCaret(RangeUpdaterRef(), &pointToPutCaret); Result 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())); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "DeleteEmptyContentNodeWithTransaction() failed"); return Err(rv); } AutoTrackDOMPoint trackPointToPutCaret(RangeUpdaterRef(), &pointToPutCaret); Result 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(pointToPutCaret); } nsresult rv = DeleteEmptyContentNodeWithTransaction(MOZ_KnownLive(textNode)); if (NS_FAILED(rv)) { NS_WARNING("DeleteEmptyContentNodeWithTransaction() failed"); return Err(rv); } } return CaretPoint(pointToPutCaret); } Result 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 leftContentToJoin = &aLeftContent; nsCOMPtr rightContentToJoin = &aRightContent; nsCOMPtr parentNode = aRightContent.GetParentNode(); EditorDOMPoint ret; while (leftContentToJoin && rightContentToJoin && parentNode && HTMLEditUtils::CanContentsBeJoined(*leftContentToJoin, *rightContentToJoin)) { // Do the join Result joinNodesResult = aHTMLEditor.JoinNodesWithTransaction(*leftContentToJoin, *rightContentToJoin); if (MOZ_UNLIKELY(joinNodesResult.isErr())) { NS_WARNING("HTMLEditor::JoinNodesWithTransaction() failed"); return joinNodesResult.propagateErr(); } ret = joinNodesResult.inspect().AtJoinedPoint(); 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 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 `` 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( aHTMLEditor.ComputeEditingHost(), EditorDOMPoint::AtEndOf(mLeftBlockElement), BlockInlineCheck::UseComputedDisplayOutsideStyle); // `WhiteSpaceVisibilityKeeper:: // MergeFirstLineOfRightBlockElementIntoDescendantLeftBlockElement()` // returns ignored when: // - No preceding invisible `
` 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 firstLineHasContent = AutoMoveOneLineHandler::CanMoveOrDeleteSomethingInLine( mPointContainingTheOtherBlockElement .NextPoint(), aEditingHost); mFallbackToDeleteLeafContent = firstLineHasContent.isOk() && !firstLineHasContent.inspect(); } } else { // Marked as handled when deleting the invisible `
` element. mFallbackToDeleteLeafContent = false; } } else if (mPointContainingTheOtherBlockElement.GetContainer() == mLeftBlockElement) { mPrecedingInvisibleBRElement = WSRunScanner::GetPrecedingBRElementUnlessVisibleContentFound( aHTMLEditor.ComputeEditingHost(), mPointContainingTheOtherBlockElement, BlockInlineCheck::UseComputedDisplayOutsideStyle); // `WhiteSpaceVisibilityKeeper:: // MergeFirstLineOfRightBlockElementIntoAncestorLeftBlockElement()` // returns ignored when: // - No preceding invisible `
` element and // - mNewListElementTagNameOfRightListElement is some and // - The right block element has no children // or, // - No preceding invisible `
` 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 rightBlockHasContent = aHTMLEditor.CanMoveChildren(*mRightBlockElement, *mLeftBlockElement); mFallbackToDeleteLeafContent = rightBlockHasContent.isOk() && !rightBlockHasContent.inspect(); } else { // Marked as handled only when it actually moves a content node. Result firstLineHasContent = AutoMoveOneLineHandler::CanMoveOrDeleteSomethingInLine( EditorDOMPoint(mRightBlockElement, 0u), aEditingHost); mFallbackToDeleteLeafContent = firstLineHasContent.isOk() && !firstLineHasContent.inspect(); } } else { // Marked as handled when deleting the invisible `
` element. mFallbackToDeleteLeafContent = false; } } else { mPrecedingInvisibleBRElement = WSRunScanner::GetPrecedingBRElementUnlessVisibleContentFound( aHTMLEditor.ComputeEditingHost(), EditorDOMPoint::AtEndOf(mLeftBlockElement), BlockInlineCheck::UseComputedDisplayOutsideStyle); // `WhiteSpaceVisibilityKeeper:: // MergeFirstLineOfRightBlockElementIntoLeftBlockElement()` always // return "handled". mFallbackToDeleteLeafContent = false; } mCanJoinBlocks = true; return true; } nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: AutoInclusiveAncestorBlockElementsJoiner::ComputeRangesToDelete( const HTMLEditor& aHTMLEditor, const EditorDOMPoint& aCaretPoint, AutoRangeArray& aRangesToDelete) const { MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty()); 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 = aRangesToDelete.Collapse(aCaretPoint); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoRangeArray::Collapse() failed"); return rv; } EditorDOMPoint pointContainingTheOtherBlock; if (!EditorUtils::IsDescendantOf(*mLeftBlockElement, *mRightBlockElement, &pointContainingTheOtherBlock)) { Unused << EditorUtils::IsDescendantOf( *mRightBlockElement, *mLeftBlockElement, &pointContainingTheOtherBlock); } EditorDOMRange range = WSRunScanner::GetRangeForDeletingBlockElementBoundaries( aHTMLEditor, *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 auto atStart = aRangesToDelete.GetFirstRangeStartPoint(); if (atStart.IsBefore(range.StartRef())) { // If the range starts from end of a container, and computed block // boundaries range starts from an invisible `
` 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(), {WalkTreeOption::IgnoreDataNodeExceptText, WalkTreeOption::StopAtBlockBoundary}, BlockInlineCheck::UseComputedDisplayOutsideStyle, editingHost) : nullptr; if (!nextContent || nextContent != range.StartRef().GetChild()) { noNeedToChangeStart = true; range.SetStart( aRangesToDelete.GetFirstRangeStartPoint()); } } if (range.EndRef().IsBefore( aRangesToDelete.GetFirstRangeEndPoint())) { if (noNeedToChangeStart) { return NS_OK; // We don't need to modify the range. } range.SetEnd(aRangesToDelete.GetFirstRangeEndPoint()); } } // XXX Oddly, we join blocks only at the first range. nsresult rv = aRangesToDelete.FirstRangeRef()->SetStartAndEnd( range.StartRef().ToRawRangeBoundary(), range.EndRef().ToRawRangeBoundary()); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AutoRangeArray::SetStartAndEnd() failed"); return rv; } Result HTMLEditor::AutoDeleteRangesHandler:: AutoBlockElementsJoiner::AutoInclusiveAncestorBlockElementsJoiner::Run( HTMLEditor& aHTMLEditor, const Element& aEditingHost) { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); MOZ_ASSERT(mLeftBlockElement); MOZ_ASSERT(mRightBlockElement); if (IsSameBlockElement()) { return EditActionResult::IgnoredResult(); } if (!mCanJoinBlocks) { return EditActionResult::HandledResult(); } EditorDOMPoint startOfRightContent; // 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. Result result(NS_ERROR_NOT_INITIALIZED); if (mPointContainingTheOtherBlockElement.GetContainer() == mRightBlockElement) { startOfRightContent = mPointContainingTheOtherBlockElement.NextPoint(); if (Element* element = startOfRightContent.GetChildAs()) { startOfRightContent = HTMLEditUtils::GetDeepestEditableStartPointOf( *element); } AutoTrackDOMPoint trackStartOfRightBlock(aHTMLEditor.RangeUpdaterRef(), &startOfRightContent); result = WhiteSpaceVisibilityKeeper:: MergeFirstLineOfRightBlockElementIntoDescendantLeftBlockElement( aHTMLEditor, MOZ_KnownLive(*mLeftBlockElement), MOZ_KnownLive(*mRightBlockElement), mPointContainingTheOtherBlockElement, mNewListElementTagNameOfRightListElement, MOZ_KnownLive(mPrecedingInvisibleBRElement), aEditingHost); if (MOZ_UNLIKELY(result.isErr())) { NS_WARNING( "WhiteSpaceVisibilityKeeper::" "MergeFirstLineOfRightBlockElementIntoDescendantLeftBlockElement() " "failed"); return result; } if (NS_WARN_IF(!startOfRightContent.IsSet()) || NS_WARN_IF(!startOfRightContent.GetContainer()->IsInComposedDoc())) { return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE); } } // 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. else if (mPointContainingTheOtherBlockElement.GetContainer() == mLeftBlockElement) { startOfRightContent = HTMLEditUtils::GetDeepestEditableStartPointOf( *mRightBlockElement); AutoTrackDOMPoint trackStartOfRightBlock(aHTMLEditor.RangeUpdaterRef(), &startOfRightContent); result = WhiteSpaceVisibilityKeeper:: MergeFirstLineOfRightBlockElementIntoAncestorLeftBlockElement( aHTMLEditor, MOZ_KnownLive(*mLeftBlockElement), MOZ_KnownLive(*mRightBlockElement), mPointContainingTheOtherBlockElement, MOZ_KnownLive(*mInclusiveDescendantOfLeftBlockElement), mNewListElementTagNameOfRightListElement, MOZ_KnownLive(mPrecedingInvisibleBRElement), aEditingHost); if (MOZ_UNLIKELY(result.isErr())) { NS_WARNING( "WhiteSpaceVisibilityKeeper::" "MergeFirstLineOfRightBlockElementIntoAncestorLeftBlockElement() " "failed"); return result; } trackStartOfRightBlock.FlushAndStopTracking(); if (NS_WARN_IF(!startOfRightContent.IsSet()) || NS_WARN_IF(!startOfRightContent.GetContainer()->IsInComposedDoc())) { return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE); } } // Normal case. Blocks are siblings, or at least close enough. An example // of the latter is

paragraph

  • one
  • two
  • three
. The // first li and the p are not true siblings, but we still want to join them // if you backspace from li into p. else { MOZ_ASSERT(!mPointContainingTheOtherBlockElement.IsSet()); startOfRightContent = HTMLEditUtils::GetDeepestEditableStartPointOf( *mRightBlockElement); AutoTrackDOMPoint trackStartOfRightBlock(aHTMLEditor.RangeUpdaterRef(), &startOfRightContent); result = WhiteSpaceVisibilityKeeper:: MergeFirstLineOfRightBlockElementIntoLeftBlockElement( aHTMLEditor, MOZ_KnownLive(*mLeftBlockElement), MOZ_KnownLive(*mRightBlockElement), mNewListElementTagNameOfRightListElement, MOZ_KnownLive(mPrecedingInvisibleBRElement), aEditingHost); if (MOZ_UNLIKELY(result.isErr())) { NS_WARNING( "WhiteSpaceVisibilityKeeper::" "MergeFirstLineOfRightBlockElementIntoLeftBlockElement() failed"); return result; } trackStartOfRightBlock.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 (meaning not replacing selection with new // content), we should put caret to end of preceding text node if there is. // Then, users can type text into it like the other browsers. if (MayEditActionDeleteAroundCollapsedSelection( aHTMLEditor.GetEditAction())) { WSRunScanner scanner(&aEditingHost, startOfRightContent, BlockInlineCheck::UseComputedDisplayStyle); WSScanResult maybePreviousText = scanner.ScanPreviousVisibleNodeOrBlockBoundaryFrom(startOfRightContent); if (maybePreviousText.IsContentEditable() && maybePreviousText.InVisibleOrCollapsibleCharacters()) { mPointToPutCaret = maybePreviousText.Point(); } } return result; } // static Result 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 oneLineRange = AutoRangeArray::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 `
` 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; } } } } nsINode* commonAncestor = oneLineRange->GetClosestCommonInclusiveAncestor(); // Currently, we move non-editable content nodes too. EditorRawDOMPoint startPoint(oneLineRange->StartRef()); if (!startPoint.IsEndOfContainer()) { return true; } EditorRawDOMPoint endPoint(oneLineRange->EndRef()); if (!endPoint.IsStartOfContainer()) { return true; } if (startPoint.GetContainer() != commonAncestor) { while (true) { EditorRawDOMPoint pointInParent(startPoint.GetContainerAs()); 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()); 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., `abc
[
]
def
`. 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(), HTMLEditUtils::ClosestBlockElement, BlockInlineCheck::UseComputedDisplayOutsideStyle) : nullptr; mDestInclusiveAncestorBlock = mPointToInsert.IsInContentNode() ? HTMLEditUtils::GetInclusiveAncestorElement( *mPointToInsert.ContainerAs(), 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(), mDestInclusiveAncestorBlock); AutoRangeArray rangesToWrapTheLine(aPointInHardLine); rangesToWrapTheLine.ExtendRangesToWrapLines( EditSubAction::eMergeBlockContents, BlockInlineCheck::UseComputedDisplayOutsideStyle, 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 HTMLEditor::AutoMoveOneLineHandler::SplitToMakeTheLineIsolated( HTMLEditor& aHTMLEditor, const nsIContent& aNewContainer, const Element& aEditingHost, nsTArray>& aOutArrayOfContents) const { AutoRangeArray rangesToWrapTheLine(mLineRange); Result splitResult = rangesToWrapTheLine .SplitTextAtEndBoundariesAndInlineAncestorsAtBothBoundaries( aHTMLEditor, BlockInlineCheck::UseComputedDisplayOutsideStyle, aEditingHost, &aNewContainer); if (MOZ_UNLIKELY(splitResult.isErr())) { NS_WARNING( "AutoRangeArray::" "SplitTextAtEndBoundariesAndInlineAncestorsAtBothBoundaries() failed"); return Err(splitResult.unwrapErr()); } EditorDOMPoint pointToPutCaret; if (splitResult.inspect().IsSet()) { pointToPutCaret = splitResult.unwrap(); } nsresult rv = rangesToWrapTheLine.CollectEditTargetNodes( aHTMLEditor, aOutArrayOfContents, EditSubAction::eMergeBlockContents, AutoRangeArray::CollectNonEditableNodes::Yes); if (NS_FAILED(rv)) { NS_WARNING( "AutoRangeArray::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()) { 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
, 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 
 for compatibility with the
  // other browsers.
  const auto IsInclusiveDescendantOfPre = [](const nsIContent& aContent) {
    // If the content has different `white-space` style from 
, we
    // shouldn't treat it as a descendant of 
 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()) {
      if (element->IsHTMLElement(nsGkAtoms::pre)) {
        return true;
      }
    }
    return false;
  };
  if (IsInclusiveDescendantOfPre(*aInclusiveAncestorBlockOfInsertionPoint) ||
      MOZ_UNLIKELY(!aContentInLine) ||
      IsInclusiveDescendantOfPre(*aContentInLine)) {
    return PreserveWhiteSpaceStyle::No;
  }
  return PreserveWhiteSpaceStyle::Yes;
}

Result 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, 64> arrayOfContents;
  {
    AutoTrackDOMPoint tackPointToInsert(aHTMLEditor.RangeUpdaterRef(),
                                        &pointToInsert);

    Result splitAtLineEdgesResult =
        SplitToMakeTheLineIsolated(
            aHTMLEditor,
            MOZ_KnownLive(*pointToInsert.ContainerAs()),
            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 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& 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"));
        Result 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;
        }
        moveContentsInLineResult |= moveChildrenResult.inspect();
        // 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 emptyContent =
            HTMLEditUtils::GetMostDistantAncestorEditableEmptyInlineElement(
                content, BlockInlineCheck::UseComputedDisplayOutsideStyle,
                &aEditingHost, pointToInsert.ContainerAs());
        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()
                     : ""));
        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"));
        // MOZ_KnownLive due to bug 1620312
        Result 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;
        }
        moveContentsInLineResult |= moveNodeOrChildrenResult.inspect();
      }
    }
    MOZ_LOG(gOneLineMoverLog, LogLevel::Info,
            ("Run: movedContentRange=%s, mPointToInsert=%s",
             ToString(movedContentRange).c_str(),
             ToString(mPointToInsert).c_str()));
    moveContentsInLineResult.MarkAsHandled();
    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 
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 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 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 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 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 inlineElement = HTMLEditUtils::GetMostDistantAncestorEditableEmptyInlineElement( *textNodeEndingWithUnnecessaryLineBreak, BlockInlineCheck::UseComputedDisplayOutsideStyle, &aEditingHost); nsresult rv = aHTMLEditor.DeleteNodeWithTransaction( inlineElement ? static_cast(*inlineElement) : static_cast( *textNodeEndingWithUnnecessaryLineBreak)); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed"); return Err(rv); } } else { Result 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"); } } } nsCOMPtr lastLineBreakContent = mMovingToParentBlock ? HTMLEditUtils::GetUnnecessaryLineBreakContent( *mTopmostSrcAncestorBlockInDestBlock, ScanLineBreak::BeforeBlock) : HTMLEditUtils::GetUnnecessaryLineBreakContent( *mDestInclusiveAncestorBlock, ScanLineBreak::AtEndOfBlock); if (!lastLineBreakContent) { return NS_OK; } EditorRawDOMPoint atUnnecessaryLineBreak(lastLineBreakContent); 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); // If it's a text node and ending with a preformatted line break, we should // delete it. if (Text* textNode = Text::FromNode(lastLineBreakContent)) { MOZ_ASSERT(EditorUtils::IsNewLinePreformatted(*textNode)); if (textNode->TextDataLength() > 1) { Result caretPointOrError = aHTMLEditor.DeleteTextWithTransaction( MOZ_KnownLive(*textNode), textNode->TextDataLength() - 1u, 1u); if (MOZ_UNLIKELY(caretPointOrError.isErr())) { NS_WARNING("HTMLEditor::DeleteTextWithTransaction() failed"); return caretPointOrError.unwrapErr(); } // IgnoreCaretPointSuggestion() because of dontChangeMySelection above. caretPointOrError.unwrap().IgnoreCaretPointSuggestion(); return NS_OK; } } else { MOZ_ASSERT(lastLineBreakContent->IsHTMLElement(nsGkAtoms::br)); } // If last line break content is the only content of its inline parent, we // should remove the parent too. if (const RefPtr inlineElement = HTMLEditUtils::GetMostDistantAncestorEditableEmptyInlineElement( *lastLineBreakContent, BlockInlineCheck::UseComputedDisplayOutsideStyle, &aEditingHost)) { nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(*inlineElement); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::DeleteNodeWithTransaction() failed"); return rv; } // Or if the text node has only the preformatted line break or
element, // we should remove it. nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(*lastLineBreakContent); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::DeleteNodeWithTransaction() failed"); return rv; } Result 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 HTMLEditor::MoveNodeOrChildrenWithTransaction( nsIContent& aContentToMove, const EditorDOMPoint& aPointToInsert, PreserveWhiteSpaceStyle aPreserveWhiteSpaceStyle, RemoveIfCommentNode aRemoveIfCommentNode) { MOZ_ASSERT(IsEditActionDataAvailable()); MOZ_ASSERT(aPointToInsert.IsInContentNode()); const auto destWhiteSpaceStyles = [&]() -> Maybe> { if (aPreserveWhiteSpaceStyle == PreserveWhiteSpaceStyle::No || !aPointToInsert.IsInContentNode()) { return Nothing(); } auto styles = EditorUtils::GetComputedWhiteSpaceStyles( *aPointToInsert.ContainerAs()); if (NS_WARN_IF(styles.isSome() && styles.value().first == StyleWhiteSpaceCollapse::PreserveSpaces)) { return Nothing(); } return styles; }(); const auto srcWhiteSpaceStyles = [&]() -> Maybe> { 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 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 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 element and // 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 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 insertSpanElementResult = InsertNodeWithTransaction(*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 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 = 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.MarkAsHandled(); return unwrappedMoveNodeResult; } return moveNodeResult; } // If it can't, move its children (if any), and then delete it. auto moveNodeResult = [&]() MOZ_CAN_RUN_SCRIPT -> Result { if (!aContentToMove.IsElement()) { return MoveNodeResult::HandledResult(aPointToInsert); } Result 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. } nsresult rv = DeleteNodeWithTransaction(aContentToMove); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed"); moveNodeResult.inspect().IgnoreCaretPointSuggestion(); return Err(rv); } if (!MayHaveMutationEventListeners()) { return moveNodeResult; } // 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 (moveNodeResult.inspect().NextInsertionPointRef().IsSetAndValid()) { return moveNodeResult; } moveNodeResult.inspect().IgnoreCaretPointSuggestion(); return MoveNodeResult::HandledResult( EditorDOMPoint::AtEndOf(*aPointToInsert.GetContainer())); } Result 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 result = CanMoveNodeOrChildren(*childContent, aNewContainer); if (result.isErr() || result.inspect()) { return result; } } return false; } Result 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 (aElement.GetFirstChild()) { Result moveNodeOrChildrenResult = MoveNodeOrChildrenWithTransaction( MOZ_KnownLive(*aElement.GetFirstChild()), moveChildrenResult.NextInsertionPointRef(), aPreserveWhiteSpaceStyle, aRemoveIfCommentNode); if (MOZ_UNLIKELY(moveNodeOrChildrenResult.isErr())) { NS_WARNING("HTMLEditor::MoveNodeOrChildrenWithTransaction() failed"); moveChildrenResult.IgnoreCaretPointSuggestion(); return moveNodeOrChildrenResult; } 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 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, 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 newContainer = aPointToInsert.ContainerAs(); nsCOMPtr nextNode = aPointToInsert.GetChild(); IgnoredErrorResult error; for (size_t i = children.Length(); i > 0; --i) { nsCOMPtr& 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( !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; } nsresult HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner:: DeleteContentButKeepTableStructure(HTMLEditor& aHTMLEditor, nsIContent& aContent) { MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); if (!HTMLEditUtils::IsAnyTableElementButNotTable(&aContent)) { nsresult rv = aHTMLEditor.DeleteNodeWithTransaction(aContent); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::DeleteNodeWithTransaction() failed"); return rv; } // 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, 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. nsresult rv = DeleteContentButKeepTableStructure(aHTMLEditor, MOZ_KnownLive(child)); if (NS_FAILED(rv)) { NS_WARNING("HTMLEditor::DeleteContentButKeepTableStructure() failed"); return rv; } } return NS_OK; } nsresult HTMLEditor::DeleteMostAncestorMailCiteElementIfEmpty( nsIContent& aContent) { MOZ_ASSERT(IsEditActionDataAvailable()); // The element must be `
` or // ``. RefPtr 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 insertBRElementResult = InsertBRElement(WithTransaction::Yes, atEmptyMailCiteElement); if (MOZ_UNLIKELY(insertBRElementResult.isErr())) { NS_WARNING("HTMLEditor::InsertBRElement(WithTransaction::Yes) failed"); return insertBRElementResult.unwrapErr(); } MOZ_ASSERT(insertBRElementResult.inspect().GetNewNode()); insertBRElementResult.inspect().IgnoreCaretPointSuggestion(); nsresult rv = CollapseSelectionTo( EditorRawDOMPoint(insertBRElementResult.inspect().GetNewNode())); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return NS_ERROR_EDITOR_DESTROYED; } NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "EditorBase::::CollapseSelectionTo() 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, AutoRangeArray& 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( *mEmptyInclusiveAncestorBlockElement, &aEditingHost, // In this case, we don't join block elements so that we won't // delete invisible trailing whitespaces in the previous element. InvisibleWhiteSpaces::Preserve, // 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), "AutoRangeArray::SetStartAndEnd() failed"); return rv; } case nsIEditor::eNext: case nsIEditor::eNextWord: case nsIEditor::eToEndOfLine: { EditorRawDOMPoint endPoint = HTMLEditUtils::GetNextEditablePoint( *mEmptyInclusiveAncestorBlockElement, &aEditingHost, // In this case, we don't join block elements so that we won't // delete invisible trailing whitespaces in the next element. InvisibleWhiteSpaces::Preserve, // 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), "AutoRangeArray::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), "AutoRangeArray::SelectNode() failed"); return rv; } Result, 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
// 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 RefPtr(); } EditorDOMPoint atParentOfEmptyListItem( mEmptyInclusiveAncestorBlockElement->GetParentElement()); if (NS_WARN_IF(!atParentOfEmptyListItem.IsSet())) { return Err(NS_ERROR_FAILURE); } if (HTMLEditUtils::IsAnyListElement(atParentOfEmptyListItem.GetContainer())) { return RefPtr(); } Result insertBRElementResult = aHTMLEditor.InsertBRElement(WithTransaction::Yes, atParentOfEmptyListItem); if (MOZ_UNLIKELY(insertBRElementResult.isErr())) { NS_WARNING("HTMLEditor::InsertBRElement(WithTransaction::Yes) failed"); return insertBRElementResult.propagateErr(); } CreateElementResult unwrappedInsertBRElementResult = insertBRElementResult.unwrap(); nsresult rv = unwrappedInsertBRElementResult.SuggestCaretPointTo( aHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion, SuggestCaret::OnlyIfTransactionsAllowedToDoIt, SuggestCaret::AndIgnoreTrivialError}); if (NS_FAILED(rv)) { NS_WARNING("CreateElementResult::SuggestCaretPointTo() failed"); return Err(rv); } MOZ_ASSERT(unwrappedInsertBRElementResult.GetNewNode()); return unwrappedInsertBRElementResult.UnwrapNewNode(); } Result 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( *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( *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 HTMLEditor::AutoDeleteRangesHandler::AutoEmptyBlockAncestorDeleter::Run( HTMLEditor& aHTMLEditor, nsIEditor::EDirection aDirectionAndAmount) { MOZ_ASSERT(mEmptyInclusiveAncestorBlockElement); MOZ_ASSERT(mEmptyInclusiveAncestorBlockElement->GetParentElement()); MOZ_ASSERT(aHTMLEditor.IsEditActionDataAvailable()); { Result result = MaybeReplaceSubListWithNewListItem(aHTMLEditor); if (MOZ_UNLIKELY(result.isErr())) { NS_WARNING( "AutoEmptyBlockAncestorDeleter::MaybeReplaceSubListWithNewListItem() " "failed"); return result; } if (result.inspect().Handled()) { return result; } } if (HTMLEditUtils::IsListItem(mEmptyInclusiveAncestorBlockElement)) { Result, nsresult> result = MaybeInsertBRElementBeforeEmptyListItemElement(aHTMLEditor); if (MOZ_UNLIKELY(result.isErr())) { NS_WARNING( "AutoEmptyBlockAncestorDeleter::" "MaybeInsertBRElementBeforeEmptyListItemElement() failed"); return result.propagateErr(); } // If a `
` element is inserted, caret should be moved to after it. if (RefPtr brElement = result.unwrap()) { nsresult rv = aHTMLEditor.CollapseSelectionTo(EditorRawDOMPoint(brElement)); if (NS_FAILED(rv)) { NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::CollapseSelectionTo() failed"); return Err(rv); } } } else { Result result = GetNewCaretPosition(aHTMLEditor, aDirectionAndAmount); if (MOZ_UNLIKELY(result.isErr())) { NS_WARNING("AutoEmptyBlockAncestorDeleter::GetNewCaretPosition() failed"); return result.propagateErr(); } MOZ_ASSERT(result.inspect().HasCaretPointSuggestion()); nsresult rv = result.inspect().SuggestCaretPointTo(aHTMLEditor, {}); if (NS_FAILED(rv)) { NS_WARNING("CaretPoint::SuggestCaretPointTo() failed"); return Err(rv); } } nsresult rv = aHTMLEditor.DeleteNodeWithTransaction( MOZ_KnownLive(*mEmptyInclusiveAncestorBlockElement)); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed"); return Err(rv); } return EditActionResult::HandledResult(); } Result 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 EditActionResult::IgnoredResult(); } RefPtr parentElement = mEmptyInclusiveAncestorBlockElement->GetParentElement(); if (!parentElement || !HTMLEditUtils::IsAnyListElement(parentElement) || !HTMLEditUtils::IsEmptyNode( *parentElement, {EmptyCheckOption::TreatNonEditableContentAsInvisible})) { return EditActionResult::IgnoredResult(); } nsCOMPtr nextSibling = mEmptyInclusiveAncestorBlockElement->GetNextSibling(); nsresult rv = aHTMLEditor.DeleteNodeWithTransaction( MOZ_KnownLive(*mEmptyInclusiveAncestorBlockElement)); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed"); return Err(rv); } Result insertListItemResult = aHTMLEditor.CreateAndInsertElement( WithTransaction::Yes, parentElement->IsHTMLElement(nsGkAtoms::dl) ? *nsGkAtoms::dd : *nsGkAtoms::li, !nextSibling || nextSibling->GetParentNode() != parentElement ? EditorDOMPoint::AtEndOf(*parentElement) : EditorDOMPoint(nextSibling), [](HTMLEditor& aHTMLEditor, Element& aNewElement, const EditorDOMPoint& aPointToInsert) -> nsresult { RefPtr 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
} IgnoredErrorResult error; aNewElement.AppendChild(*brElement, error); NS_WARNING_ASSERTION(!error.Failed(), "nsINode::AppendChild() failed, but ignored"); return NS_OK; }); if (MOZ_UNLIKELY(insertListItemResult.isErr())) { NS_WARNING("HTMLEditor::CreateAndInsertElement() failed"); return insertListItemResult.propagateErr(); } CreateElementResult unwrappedInsertListItemResult = insertListItemResult.unwrap(); unwrappedInsertListItemResult.IgnoreCaretPointSuggestion(); rv = aHTMLEditor.CollapseSelectionTo( EditorRawDOMPoint(unwrappedInsertListItemResult.GetNewNode(), 0u)); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::CollapseSelectionTo() failed"); return Err(rv); } return EditActionResult::HandledResult(); } template Result HTMLEditor::AutoDeleteRangesHandler::ExtendOrShrinkRangeToDelete( const HTMLEditor& aHTMLEditor, const nsFrameSelection* aFrameSelection, 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); } // Look for the common ancestor's block element. 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 Element* const maybeNonEditableBlockElement = HTMLEditUtils::GetInclusiveAncestorElement( *commonAncestor, HTMLEditUtils::ClosestBlockElement, BlockInlineCheck::UseComputedDisplayOutsideStyle); if (NS_WARN_IF(!maybeNonEditableBlockElement)) { return Err(NS_ERROR_FAILURE); } // Set up for loops and cache our root element RefPtr editingHost = aHTMLEditor.ComputeEditingHost(); if (NS_WARN_IF(!editingHost)) { return Err(NS_ERROR_FAILURE); } // 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(), EditorType::HTML) && EditorUtils::IsEditableContent( *range.EndRef().ContainerAs(), 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() != maybeNonEditableBlockElement && rangeToDelete.StartRef().GetContainer() != editingHost) { for (;;) { WSScanResult backwardScanFromStartResult = WSRunScanner::ScanPreviousVisibleNodeOrBlockBoundary( editingHost, rangeToDelete.StartRef(), BlockInlineCheck::UseComputedDisplayOutsideStyle); if (!backwardScanFromStartResult.ReachedCurrentBlockBoundary()) { break; } MOZ_ASSERT(backwardScanFromStartResult.GetContent() == WSRunScanner(editingHost, 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() == maybeNonEditableBlockElement || backwardScanFromStartResult.GetContent() == editingHost) { 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 (StaticPrefs::editor_block_inline_check_use_computed_style() && backwardScanFromStartResult.ContentIsElement() && HTMLEditUtils::IsFlexOrGridItem( *backwardScanFromStartResult.ElementPtr())) { break; } rangeToDelete.SetStart( backwardScanFromStartResult.PointAtContent()); } if (aFrameSelection && !aFrameSelection->IsValidSelectionPoint( 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 `
`, or if // we really needed to pass that `
` (i.e., its block is now totally // selected). // Find next visible things after end of selection EditorDOMPoint atFirstInvisibleBRElement; if (rangeToDelete.EndRef().GetContainer() != maybeNonEditableBlockElement && rangeToDelete.EndRef().GetContainer() != editingHost) { for (;;) { WSRunScanner wsScannerAtEnd( editingHost, rangeToDelete.EndRef(), BlockInlineCheck::UseComputedDisplayOutsideStyle); WSScanResult forwardScanFromEndResult = wsScannerAtEnd.ScanNextVisibleNodeOrBlockBoundaryFrom( rangeToDelete.EndRef()); if (forwardScanFromEndResult.ReachedBRElement()) { // XXX In my understanding, this is odd. The end reason may not be // same as the reached
element because the equality is // guaranteed only when ReachedCurrentBlockBoundary() returns true. // However, looks like that this code assumes that // GetEndReasonContent() returns the (or a)
element. NS_ASSERTION(wsScannerAtEnd.GetEndReasonContent() == forwardScanFromEndResult.BRElementPtr(), "End reason is not the reached
element"); if (HTMLEditUtils::IsVisibleBRElement( *wsScannerAtEnd.GetEndReasonContent())) { break; } if (!atFirstInvisibleBRElement.IsSet()) { atFirstInvisibleBRElement = rangeToDelete.EndRef().To(); } rangeToDelete.SetEnd( EditorRawDOMPoint::After(*wsScannerAtEnd.GetEndReasonContent())); continue; } if (forwardScanFromEndResult.ReachedCurrentBlockBoundary()) { 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() == maybeNonEditableBlockElement || forwardScanFromEndResult.GetContent() == editingHost) { break; } // Don't cross flex-item/grid-item boundary to make new content inserted // into it. if (StaticPrefs::editor_block_inline_check_use_computed_style() && forwardScanFromEndResult.ContentIsElement() && HTMLEditUtils::IsFlexOrGridItem( *forwardScanFromEndResult.ElementPtr())) { break; } rangeToDelete.SetEnd( forwardScanFromEndResult.PointAfterContent()); continue; } break; } if (aFrameSelection && !aFrameSelection->IsValidSelectionPoint( 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 `
` element. if (const RefPtr editableBlockContainingBRElement = HTMLEditUtils::GetInclusiveAncestorElement( *atFirstInvisibleBRElement.ContainerAs(), HTMLEditUtils::ClosestEditableBlockElement, BlockInlineCheck::UseComputedDisplayOutsideStyle)) { if (rangeToDelete.Contains( EditorRawDOMPoint(editableBlockContainingBRElement))) { return rangeToDelete; } // Otherwise, the new range should end at the invisible `
`. if (aFrameSelection && !aFrameSelection->IsValidSelectionPoint( atFirstInvisibleBRElement.GetContainer())) { NS_WARNING( "Computed end container (`
` 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( *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( *lastListItemElement); }; Element* const startListElement = aRangeToDelete.StartRef().IsInContentNode() ? HTMLEditUtils::GetClosestInclusiveAncestorAnyListElement( *aRangeToDelete.StartRef().ContainerAs()) : nullptr; Element* const endListElement = aRangeToDelete.EndRef().IsInContentNode() ? HTMLEditUtils::GetClosestInclusiveAncestorAnyListElement( *aRangeToDelete.EndRef().ContainerAs()) : 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()) { 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()) { 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(), 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())); 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