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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "mozilla/TextEditor.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/HTMLEditor.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/SelectionState.h"
#include "mozilla/TextControlElement.h"
#include "mozilla/dom/DataTransfer.h"
#include "mozilla/dom/DocumentInlines.h"
#include "mozilla/dom/DragEvent.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/dom/StaticRange.h"
#include "nsAString.h"
#include "nsCOMPtr.h"
#include "nsComponentManagerUtils.h"
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsFocusManager.h"
#include "nsIClipboard.h"
#include "nsIContent.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/Document.h"
#include "nsIDragService.h"
#include "nsIDragSession.h"
#include "nsIDocShell.h"
#include "nsIDocShellTreeItem.h"
#include "nsIPrincipal.h"
#include "nsIFormControl.h"
#include "nsISupportsPrimitives.h"
#include "nsITransferable.h"
#include "nsIVariant.h"
#include "nsLiteralString.h"
#include "nsRange.h"
#include "nsServiceManagerUtils.h"
#include "nsString.h"
#include "nsXPCOM.h"
#include "nscore.h"
class nsILoadContext;
class nsISupports;
namespace mozilla {
using namespace dom;
nsresult TextEditor::PrepareTransferable(nsITransferable** aOutTransferable) {
MOZ_ASSERT(aOutTransferable);
MOZ_ASSERT(!*aOutTransferable);
// Create generic Transferable for getting the data
nsresult rv;
nsCOMPtr<nsITransferable> transferable =
do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
if (NS_FAILED(rv)) {
NS_WARNING("do_CreateInstance() failed to create nsITransferable instance");
return rv;
}
if (!transferable) {
NS_WARNING("do_CreateInstance() returned nullptr, but ignored");
return NS_OK;
}
RefPtr<Document> document = GetDocument();
nsILoadContext* loadContext = document ? document->GetLoadContext() : nullptr;
DebugOnly<nsresult> rvIgnored = transferable->Init(loadContext);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::Init() failed, but ignored");
rvIgnored = transferable->AddDataFlavor(kUnicodeMime);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kUnicodeMime) failed, but ignored");
rvIgnored = transferable->AddDataFlavor(kMozTextInternal);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kMozTextInternal) failed, but ignored");
transferable.forget(aOutTransferable);
return NS_OK;
}
nsresult TextEditor::PrepareToInsertContent(
const EditorDOMPoint& aPointToInsert, bool aDoDeleteSelection) {
// TODO: Move this method to `EditorBase`.
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(aPointToInsert.IsSet());
EditorDOMPoint pointToInsert(aPointToInsert);
if (aDoDeleteSelection) {
AutoTrackDOMPoint tracker(RangeUpdaterRef(), &pointToInsert);
nsresult rv = DeleteSelectionAsSubAction(
nsIEditor::eNone,
IsTextEditor() ? nsIEditor::eNoStrip : nsIEditor::eStrip);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteSelectionAsSubAction(eNone) failed");
return rv;
}
}
IgnoredErrorResult error;
MOZ_KnownLive(SelectionRefPtr())->CollapseInLimiter(pointToInsert, error);
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(!error.Failed(),
"Selection::CollapseInLimiter() failed");
return error.StealNSResult();
}
nsresult TextEditor::InsertTextAt(const nsAString& aStringToInsert,
const EditorDOMPoint& aPointToInsert,
bool aDoDeleteSelection) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(aPointToInsert.IsSet());
nsresult rv = PrepareToInsertContent(aPointToInsert, aDoDeleteSelection);
if (NS_FAILED(rv)) {
NS_WARNING("TextEditor::PrepareToInsertContent() failed");
return rv;
}
rv = InsertTextAsSubAction(aStringToInsert);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::InsertTextAsSubAction() failed");
return rv;
}
nsresult TextEditor::InsertTextFromTransferable(
nsITransferable* aTransferable) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!AsHTMLEditor());
nsAutoCString bestFlavor;
nsCOMPtr<nsISupports> genericDataObj;
nsresult rv = aTransferable->GetAnyTransferData(
bestFlavor, getter_AddRefs(genericDataObj));
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"nsITransferable::GetAnyDataTransferData() failed, but ignored");
if (NS_SUCCEEDED(rv) && (bestFlavor.EqualsLiteral(kUnicodeMime) ||
bestFlavor.EqualsLiteral(kMozTextInternal))) {
AutoTransactionsConserveSelection dontChangeMySelection(*this);
nsAutoString stuffToPaste;
if (nsCOMPtr<nsISupportsString> text = do_QueryInterface(genericDataObj)) {
text->GetData(stuffToPaste);
}
MOZ_ASSERT(GetEditAction() == EditAction::ePaste);
// Use native line breaks for compatibility with Chrome.
// XXX Although, somebody has already converted native line breaks to
// XP line breaks.
UpdateEditActionData(stuffToPaste);
nsresult rv = MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(
rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"EditorBase::MaybeDispatchBeforeInputEvent() failed");
return rv;
}
if (!stuffToPaste.IsEmpty()) {
// Sanitize possible carriage returns in the string to be inserted
nsContentUtils::PlatformToDOMLineBreaks(stuffToPaste);
AutoPlaceholderBatch treatAsOneTransaction(*this,
ScrollSelectionIntoView::Yes);
nsresult rv = InsertTextAsSubAction(stuffToPaste);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::InsertTextAsSubAction() failed");
return rv;
}
}
}
// Try to scroll the selection into view if the paste/drop succeeded
rv = ScrollSelectionFocusIntoView();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::ScrollSelectionFocusIntoView() failed");
return rv;
}
nsresult TextEditor::OnDrop(DragEvent* aDropEvent) {
if (NS_WARN_IF(!aDropEvent)) {
return NS_ERROR_INVALID_ARG;
}
DebugOnly<nsresult> rvIgnored = CommitComposition();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"EditorBase::CommitComposition() failed, but ignored");
AutoEditActionDataSetter editActionData(*this, EditAction::eDrop);
// We need to initialize data or dataTransfer later. Therefore, we cannot
// dispatch "beforeinput" event until then.
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<DataTransfer> dataTransfer = aDropEvent->GetDataTransfer();
if (NS_WARN_IF(!dataTransfer)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession();
if (NS_WARN_IF(!dragSession)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsINode> sourceNode = dataTransfer->GetMozSourceNode();
RefPtr<Document> srcdoc;
if (sourceNode) {
srcdoc = sourceNode->OwnerDoc();
}
if (nsContentUtils::CheckForSubFrameDrop(
dragSession, aDropEvent->WidgetEventPtr()->AsDragEvent())) {
// Don't allow drags from subframe documents with different origins than
// the drop destination.
if (srcdoc && !IsSafeToInsertData(srcdoc)) {
return NS_OK;
}
}
// Current doc is destination
RefPtr<Document> document = GetDocument();
if (NS_WARN_IF(!document)) {
return NS_ERROR_NOT_INITIALIZED;
}
const uint32_t numItems = dataTransfer->MozItemCount();
if (NS_WARN_IF(!numItems)) {
return NS_ERROR_FAILURE; // Nothing to drop?
}
// We have to figure out whether to delete and relocate caret only once
// Parent and offset are under the mouse cursor.
int32_t dropOffset = -1;
nsCOMPtr<nsIContent> dropParentContent =
aDropEvent->GetRangeParentContentAndOffset(&dropOffset);
EditorDOMPoint droppedAt(dropParentContent, dropOffset);
if (NS_WARN_IF(!droppedAt.IsSet()) ||
NS_WARN_IF(!droppedAt.GetContainerAsContent())) {
return NS_ERROR_FAILURE;
}
// Check if dropping into a selected range. If so and the source comes from
// same document, jump through some hoops to determine if mouse is over
// selection (bail) and whether user wants to copy selection or delete it.
if (sourceNode && sourceNode->IsEditable() && srcdoc == document) {
bool isPointInSelection = EditorUtils::IsPointInSelection(
*SelectionRefPtr(), *droppedAt.GetContainer(), droppedAt.Offset());
if (isPointInSelection) {
// If source document and destination document is same and dropping
// into one of selected ranges, we don't need to do nothing.
// XXX If the source comes from outside of this editor, this check
// means that we don't allow to drop the item in the selected
// range. However, the selection is hidden until the <input> or
// <textarea> gets focus, therefore, this looks odd.
return NS_OK;
}
}
// Delete if user doesn't want to copy when user moves selected content
// to different place in same editor.
// XXX Do we need the check whether it's in same document or not?
RefPtr<TextEditor> editorToDeleteSelection;
if (sourceNode && sourceNode->IsEditable() && srcdoc == document) {
if ((dataTransfer->DropEffectInt() &
nsIDragService::DRAGDROP_ACTION_MOVE) &&
!(dataTransfer->DropEffectInt() &
nsIDragService::DRAGDROP_ACTION_COPY)) {
// If the source node is in native anonymous tree, it must be in
// <input> or <textarea> element. If so, its TextEditor can remove it.
if (sourceNode->IsInNativeAnonymousSubtree()) {
if (RefPtr<TextControlElement> textControlElement =
TextControlElement::FromNodeOrNull(
sourceNode->GetClosestNativeAnonymousSubtreeRootParent())) {
editorToDeleteSelection = textControlElement->GetTextEditor();
}
}
// Otherwise, must be the content is in HTMLEditor.
else if (AsHTMLEditor()) {
editorToDeleteSelection = this;
} else {
editorToDeleteSelection =
nsContentUtils::GetHTMLEditor(srcdoc->GetPresContext());
}
}
// If the found editor isn't modifiable, we should not try to delete
// selection.
if (editorToDeleteSelection && !editorToDeleteSelection->IsModifiable()) {
editorToDeleteSelection = nullptr;
}
// If the found editor has collapsed selection, we need to delete nothing
// in the editor.
if (editorToDeleteSelection) {
if (Selection* selection = editorToDeleteSelection->GetSelection()) {
if (selection->IsCollapsed()) {
editorToDeleteSelection = nullptr;
}
}
}
}
if (IsPlaintextEditor()) {
for (nsIContent* content = droppedAt.GetContainerAsContent(); content;
content = content->GetParent()) {
nsCOMPtr<nsIFormControl> formControl(do_QueryInterface(content));
if (formControl && !formControl->AllowDrop()) {
// Don't allow dropping into a form control that doesn't allow being
// dropped into.
return NS_OK;
}
}
}
// Combine any deletion and drop insertion into one transaction.
AutoPlaceholderBatch treatAsOneTransaction(*this,
ScrollSelectionIntoView::Yes);
// Don't dispatch "selectionchange" event until inserting all contents.
SelectionBatcher selectionBatcher(SelectionRefPtr());
// Track dropped point with nsRange because we shouldn't insert the
// dropped content into different position even if some event listeners
// modify selection. Note that Chrome's behavior is really odd. So,
// we don't need to worry about web-compat about this.
IgnoredErrorResult ignoredError;
RefPtr<nsRange> rangeAtDropPoint =
nsRange::Create(droppedAt.ToRawRangeBoundary(),
droppedAt.ToRawRangeBoundary(), ignoredError);
if (NS_WARN_IF(ignoredError.Failed()) ||
NS_WARN_IF(!rangeAtDropPoint->IsPositioned())) {
editActionData.Abort();
return NS_ERROR_FAILURE;
}
// Remove selected contents first here because we need to fire a pair of
// "beforeinput" and "input" for deletion and web apps can cancel only
// this deletion. Note that callee may handle insertion asynchronously.
// Therefore, it is the best to remove selected content here.
if (editorToDeleteSelection) {
nsresult rv = editorToDeleteSelection->DeleteSelectionByDragAsAction(
mDispatchInputEvent);
if (NS_WARN_IF(Destroyed())) {
editActionData.Abort();
return NS_OK;
}
// Ignore the editor instance specific error if it's another editor.
if (this != editorToDeleteSelection &&
(rv == NS_ERROR_NOT_INITIALIZED || rv == NS_ERROR_EDITOR_DESTROYED)) {
rv = NS_OK;
}
// Don't cancel "insertFromDrop" even if "deleteByDrag" is canceled.
if (rv != NS_ERROR_EDITOR_ACTION_CANCELED && NS_FAILED(rv)) {
NS_WARNING("TextEditor::DeleteSelectionByDragAsAction() failed");
editActionData.Abort();
return EditorBase::ToGenericNSResult(rv);
}
if (NS_WARN_IF(!rangeAtDropPoint->IsPositioned()) ||
NS_WARN_IF(!rangeAtDropPoint->GetStartContainer()->IsContent())) {
editActionData.Abort();
return NS_ERROR_FAILURE;
}
droppedAt = rangeAtDropPoint->StartRef();
MOZ_ASSERT(droppedAt.IsSetAndValid());
}
// Before inserting dropping content, we need to move focus for compatibility
// with Chrome and firing "beforeinput" event on new editing host.
RefPtr<Element> focusedElement, newFocusedElement;
if (!AsHTMLEditor()) {
newFocusedElement = GetExposedRoot();
focusedElement = IsActiveInDOMWindow() ? newFocusedElement : nullptr;
} else if (!AsHTMLEditor()->IsInDesignMode()) {
focusedElement = AsHTMLEditor()->GetActiveEditingHost();
if (focusedElement &&
droppedAt.GetContainerAsContent()->IsInclusiveDescendantOf(
focusedElement)) {
newFocusedElement = focusedElement;
} else {
newFocusedElement = droppedAt.GetContainerAsContent()->GetEditingHost();
}
}
// Move selection right now. Note that this does not move focus because
// `Selection` moves focus with selection change only when the API caller is
// JS. And also this does not notify selection listeners (nor
// "selectionchange") since we created SelectionBatcher above.
ErrorResult error;
MOZ_KnownLive(SelectionRefPtr())
->SetStartAndEnd(droppedAt.ToRawRangeBoundary(),
droppedAt.ToRawRangeBoundary(), error);
if (error.Failed()) {
NS_WARNING("Selection::SetStartAndEnd() failed");
editActionData.Abort();
return error.StealNSResult();
}
if (NS_WARN_IF(Destroyed())) {
editActionData.Abort();
return NS_OK;
}
// Then, move focus if necessary. This must cause dispatching "blur" event
// and "focus" event.
if (newFocusedElement && focusedElement != newFocusedElement) {
RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager();
DebugOnly<nsresult> rvIgnored = fm->SetFocus(newFocusedElement, 0);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsFocusManager::SetFocus() failed to set focus "
"to the element, but ignored");
if (NS_WARN_IF(Destroyed())) {
editActionData.Abort();
return NS_OK;
}
// "blur" or "focus" event listener may have changed the value.
// Let's keep using the original point.
if (NS_WARN_IF(!rangeAtDropPoint->IsPositioned()) ||
NS_WARN_IF(!rangeAtDropPoint->GetStartContainer()->IsContent())) {
return NS_ERROR_FAILURE;
}
droppedAt = rangeAtDropPoint->StartRef();
MOZ_ASSERT(droppedAt.IsSetAndValid());
// If focus is changed to different element and we're handling drop in
// contenteditable, we cannot handle it without focus. So, we should give
// it up.
if (AsHTMLEditor() && !AsHTMLEditor()->IsInDesignMode() &&
NS_WARN_IF(newFocusedElement !=
AsHTMLEditor()->GetActiveEditingHost())) {
editActionData.Abort();
return NS_OK;
}
}
if (!AsHTMLEditor()) {
AutoTArray<nsString, 5> textArray;
textArray.SetCapacity(numItems);
uint32_t textLength = 0;
for (uint32_t i = 0; i < numItems; ++i) {
nsCOMPtr<nsIVariant> data;
dataTransfer->GetDataAtNoSecurityCheck(u"text/plain"_ns, i,
getter_AddRefs(data));
if (!data) {
continue;
}
// Use nsString to avoid copying its storage to textArray.
nsString insertText;
data->GetAsAString(insertText);
if (insertText.IsEmpty()) {
continue;
}
textArray.AppendElement(insertText);
textLength += insertText.Length();
}
// Use nsString to avoid copying its storage to editActionData.
nsString data;
data.SetCapacity(textLength);
// Join the text array from end to start because we insert each items
// in the dataTransfer at same point from start to end. Although I
// don't know whether this is intentional behavior.
for (nsString& text : Reversed(textArray)) {
data.Append(text);
}
// Use native line breaks for compatibility with Chrome.
// XXX Although, somebody has already converted native line breaks to
// XP line breaks.
editActionData.SetData(data);
nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
// Then, insert the text. Note that we shouldn't need to walk the array
// anymore because nobody should listen to mutation events of anonymous
// text node in <input>/<textarea>.
nsContentUtils::PlatformToDOMLineBreaks(data);
DebugOnly<nsresult> rvIgnored = InsertTextAt(data, droppedAt, false);
if (NS_WARN_IF(Destroyed())) {
return NS_OK;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"TextEditor::InsertTextAt() failed, but ignored");
} else {
editActionData.InitializeDataTransfer(dataTransfer);
RefPtr<StaticRange> targetRange = StaticRange::Create(
droppedAt.GetContainer(), droppedAt.Offset(), droppedAt.GetContainer(),
droppedAt.Offset(), IgnoreErrors());
NS_WARNING_ASSERTION(targetRange && targetRange->IsPositioned(),
"Why did we fail to create collapsed static range at "
"dropped position?");
if (targetRange && targetRange->IsPositioned()) {
editActionData.AppendTargetRange(*targetRange);
}
nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
RefPtr<HTMLEditor> htmlEditor(AsHTMLEditor());
for (uint32_t i = 0; i < numItems; ++i) {
DebugOnly<nsresult> rvIgnored = htmlEditor->InsertFromDataTransfer(
dataTransfer, i, srcdoc, droppedAt, false);
if (NS_WARN_IF(Destroyed())) {
return NS_OK;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"HTMLEditor::InsertFromDataTransfer() failed, but ignored");
}
}
nsresult rv = ScrollSelectionFocusIntoView();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::ScrollSelectionFocusIntoView() failed");
return rv;
}
nsresult TextEditor::DeleteSelectionByDragAsAction(bool aDispatchInputEvent) {
// TODO: Move this method to `EditorBase`.
AutoRestore<bool> saveDispatchInputEvent(mDispatchInputEvent);
mDispatchInputEvent = aDispatchInputEvent;
// Even if we're handling "deleteByDrag" in same editor as "insertFromDrop",
// we need to recreate edit action data here because
// `AutoEditActionDataSetter` needs to manage event state separately.
bool requestedByAnotherEditor = GetEditAction() != EditAction::eDrop;
AutoEditActionDataSetter editActionData(*this, EditAction::eDeleteByDrag);
MOZ_ASSERT(!SelectionRefPtr()->IsCollapsed());
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return rv;
}
// But keep using placeholder transaction for "insertFromDrop" if there is.
Maybe<AutoPlaceholderBatch> treatAsOneTransaction;
if (requestedByAnotherEditor) {
treatAsOneTransaction.emplace(*this, ScrollSelectionIntoView::Yes);
}
rv = DeleteSelectionAsSubAction(nsIEditor::eNone, IsTextEditor()
? nsIEditor::eNoStrip
: nsIEditor::eStrip);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteSelectionAsSubAction(eNone) failed");
return rv;
}
if (!mDispatchInputEvent) {
return NS_OK;
}
if (treatAsOneTransaction.isNothing()) {
DispatchInputEvent();
}
return NS_WARN_IF(Destroyed()) ? NS_ERROR_EDITOR_DESTROYED : NS_OK;
}
nsresult TextEditor::PasteAsAction(int32_t aClipboardType,
bool aDispatchPasteEvent,
nsIPrincipal* aPrincipal) {
AutoEditActionDataSetter editActionData(*this, EditAction::ePaste,
aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
if (aDispatchPasteEvent) {
if (!FireClipboardEvent(ePaste, aClipboardType)) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
} else {
// The caller must already have dispatched a "paste" event.
editActionData.NotifyOfDispatchingClipboardEvent();
}
if (AsHTMLEditor()) {
editActionData.InitializeDataTransferWithClipboard(
SettingDataTransfer::eWithFormat, aClipboardType);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(
rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
rv = MOZ_KnownLive(AsHTMLEditor())->PasteInternal(aClipboardType);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::PasteInternal() failed");
return EditorBase::ToGenericNSResult(rv);
}
// The data will be initialized in InsertTextFromTransferable() if we're not
// an HTMLEditor. Therefore, we cannot dispatch "beforeinput" here.
// Get Clipboard Service
nsresult rv;
nsCOMPtr<nsIClipboard> clipboard =
do_GetService("@mozilla.org/widget/clipboard;1", &rv);
if (NS_FAILED(rv)) {
NS_WARNING("Failed to get nsIClipboard service");
return rv;
}
// Get the nsITransferable interface for getting the data from the clipboard
nsCOMPtr<nsITransferable> transferable;
rv = PrepareTransferable(getter_AddRefs(transferable));
if (NS_FAILED(rv)) {
NS_WARNING("TextEditor::PrepareTransferable() failed");
return EditorBase::ToGenericNSResult(rv);
}
if (NS_WARN_IF(!transferable)) {
NS_WARNING(
"TextEditor::PrepareTransferable() returned nullptr, but ignored");
return NS_OK; // XXX Why?
}
// Get the Data from the clipboard.
rv = clipboard->GetData(transferable, aClipboardType);
if (NS_FAILED(rv)) {
NS_WARNING("nsIClipboard::GetData() failed, but ignored");
return NS_OK; // XXX Why?
}
// XXX Why don't we check this first?
if (!IsModifiable()) {
return NS_OK;
}
rv = InsertTextFromTransferable(transferable);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"TextEditor::InsertTextFromTransferable() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult TextEditor::PasteTransferableAsAction(nsITransferable* aTransferable,
nsIPrincipal* aPrincipal) {
AutoEditActionDataSetter editActionData(*this, EditAction::ePaste,
aPrincipal);
// The data will be initialized in InsertTextFromTransferable(). Therefore,
// we cannot dispatch "beforeinput" here.
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
// Use an invalid value for the clipboard type as data comes from
// aTransferable and we don't currently implement a way to put that in the
// data transfer yet.
if (!FireClipboardEvent(ePaste, -1)) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
if (!IsModifiable()) {
return NS_OK;
}
nsresult rv = InsertTextFromTransferable(aTransferable);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"TextEditor::InsertTextFromTransferable() failed");
return EditorBase::ToGenericNSResult(rv);
}
bool TextEditor::CanPaste(int32_t aClipboardType) const {
if (AreClipboardCommandsUnconditionallyEnabled()) {
return true;
}
// can't paste if readonly
if (!IsModifiable()) {
return false;
}
nsresult rv;
nsCOMPtr<nsIClipboard> clipboard(
do_GetService("@mozilla.org/widget/clipboard;1", &rv));
if (NS_FAILED(rv)) {
NS_WARNING("Failed to get nsIClipboard service");
return false;
}
// the flavors that we can deal with
AutoTArray<nsCString, 1> textEditorFlavors = {
nsDependentCString(kUnicodeMime)};
bool haveFlavors;
rv = clipboard->HasDataMatchingFlavors(textEditorFlavors, aClipboardType,
&haveFlavors);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsIClipboard::HasDataMatchingFlavors() failed");
return NS_SUCCEEDED(rv) && haveFlavors;
}
bool TextEditor::CanPasteTransferable(nsITransferable* aTransferable) {
// can't paste if readonly
if (!IsModifiable()) {
return false;
}
// If |aTransferable| is null, assume that a paste will succeed.
if (!aTransferable) {
return true;
}
nsCOMPtr<nsISupports> data;
nsresult rv =
aTransferable->GetTransferData(kUnicodeMime, getter_AddRefs(data));
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsITransferable::GetTransferData(kUnicodeMime) failed");
return NS_SUCCEEDED(rv) && data;
}
bool TextEditor::IsSafeToInsertData(const Document* aSourceDoc) const {
// Try to determine whether we should use a sanitizing fragment sink
bool isSafe = false;
RefPtr<Document> destdoc = GetDocument();
NS_ASSERTION(destdoc, "Where is our destination doc?");
nsCOMPtr<nsIDocShell> docShell;
if (RefPtr<BrowsingContext> bc = destdoc->GetBrowsingContext()) {
RefPtr<BrowsingContext> root = bc->Top();
MOZ_ASSERT(root, "root should not be null");
docShell = root->GetDocShell();
}
isSafe = docShell && docShell->GetAppType() == nsIDocShell::APP_TYPE_EDITOR;
if (!isSafe && aSourceDoc) {
nsIPrincipal* srcPrincipal = aSourceDoc->NodePrincipal();
nsIPrincipal* destPrincipal = destdoc->NodePrincipal();
NS_ASSERTION(srcPrincipal && destPrincipal,
"How come we don't have a principal?");
DebugOnly<nsresult> rvIgnored =
srcPrincipal->Subsumes(destPrincipal, &isSafe);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsIPrincipal::Subsumes() failed, but ignored");
}
return isSafe;
}
} // namespace mozilla
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