/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=2 sw=2 et tw=78: */ /* 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 #include "EditAction.h" #include "EditorDOMPoint.h" #include "EditorUtils.h" #include "HTMLEditHelpers.h" #include "HTMLEditUtils.h" #include "InternetCiter.h" #include "PendingStyles.h" #include "SelectionState.h" #include "WSRunObject.h" #include "ErrorList.h" #include "mozilla/dom/Comment.h" #include "mozilla/dom/DataTransfer.h" #include "mozilla/dom/Document.h" #include "mozilla/dom/DocumentFragment.h" #include "mozilla/dom/DOMException.h" #include "mozilla/dom/DOMStringList.h" #include "mozilla/dom/DOMStringList.h" #include "mozilla/dom/Event.h" #include "mozilla/dom/FileBlobImpl.h" #include "mozilla/dom/FileReader.h" #include "mozilla/dom/Selection.h" #include "mozilla/dom/StaticRange.h" #include "mozilla/dom/WorkerRef.h" #include "mozilla/ArrayUtils.h" #include "mozilla/Attributes.h" #include "mozilla/Base64.h" #include "mozilla/BasicEvents.h" #include "mozilla/DebugOnly.h" #include "mozilla/Maybe.h" #include "mozilla/OwningNonNull.h" #include "mozilla/Preferences.h" #include "mozilla/Result.h" #include "nsAString.h" #include "nsCOMPtr.h" #include "nsCRTGlue.h" // for CRLF #include "nsComponentManagerUtils.h" #include "nsIScriptError.h" #include "nsContentUtils.h" #include "nsDebug.h" #include "nsDependentSubstring.h" #include "nsError.h" #include "nsFocusManager.h" #include "nsGkAtoms.h" #include "nsIClipboard.h" #include "nsIContent.h" #include "nsIDocumentEncoder.h" #include "nsIFile.h" #include "nsIInputStream.h" #include "nsIMIMEService.h" #include "nsINode.h" #include "nsIParserUtils.h" #include "nsIPrincipal.h" #include "nsISupportsImpl.h" #include "nsISupportsPrimitives.h" #include "nsISupportsUtils.h" #include "nsITransferable.h" #include "nsIVariant.h" #include "nsLinebreakConverter.h" #include "nsLiteralString.h" #include "nsNameSpaceManager.h" #include "nsNetUtil.h" #include "nsPrintfCString.h" #include "nsRange.h" #include "nsReadableUtils.h" #include "nsServiceManagerUtils.h" #include "nsStreamUtils.h" #include "nsString.h" #include "nsStringFwd.h" #include "nsStringIterator.h" #include "nsTreeSanitizer.h" #include "nsXPCOM.h" #include "nscore.h" #include "nsContentUtils.h" #include "nsQueryObject.h" class nsAtom; class nsILoadContext; namespace mozilla { using namespace dom; using EmptyCheckOption = HTMLEditUtils::EmptyCheckOption; using LeafNodeType = HTMLEditUtils::LeafNodeType; #define kInsertCookie "_moz_Insert Here_moz_" // some little helpers static bool FindIntegerAfterString(const char* aLeadingString, const nsCString& aCStr, int32_t& foundNumber); static void RemoveFragComments(nsCString& aStr); nsresult HTMLEditor::InsertDroppedDataTransferAsAction( AutoEditActionDataSetter& aEditActionData, DataTransfer& aDataTransfer, const EditorDOMPoint& aDroppedAt, nsIPrincipal* aSourcePrincipal) { MOZ_ASSERT(aEditActionData.GetEditAction() == EditAction::eDrop); MOZ_ASSERT(GetEditAction() == EditAction::eDrop); MOZ_ASSERT(aDroppedAt.IsSet()); MOZ_ASSERT(aDataTransfer.MozItemCount() > 0); if (IsReadonly()) { return NS_OK; } aEditActionData.InitializeDataTransfer(&aDataTransfer); RefPtr targetRange = StaticRange::Create( aDroppedAt.GetContainer(), aDroppedAt.Offset(), aDroppedAt.GetContainer(), aDroppedAt.Offset(), IgnoreErrors()); NS_WARNING_ASSERTION(targetRange && targetRange->IsPositioned(), "Why did we fail to create collapsed static range at " "dropped position?"); if (targetRange && targetRange->IsPositioned()) { aEditActionData.AppendTargetRange(*targetRange); } nsresult rv = aEditActionData.MaybeDispatchBeforeInputEvent(); if (NS_FAILED(rv)) { NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED, "MaybeDispatchBeforeInputEvent() failed"); return rv; } uint32_t numItems = aDataTransfer.MozItemCount(); for (uint32_t i = 0; i < numItems; ++i) { DebugOnly rvIgnored = InsertFromDataTransfer(&aDataTransfer, i, aSourcePrincipal, aDroppedAt, DeleteSelectedContent::No); if (NS_WARN_IF(Destroyed())) { return NS_OK; } NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), "HTMLEditor::InsertFromDataTransfer(" "DeleteSelectedContent::No) failed, but ignored"); } return NS_OK; } nsresult HTMLEditor::LoadHTML(const nsAString& aInputString) { MOZ_ASSERT(IsEditActionDataAvailable()); if (NS_WARN_IF(!mInitSucceeded)) { return NS_ERROR_NOT_INITIALIZED; } // force IME commit; set up rules sniffing and batching DebugOnly rvIgnored = CommitComposition(); NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), "EditorBase::CommitComposition() failed, but ignored"); if (NS_WARN_IF(Destroyed())) { return NS_ERROR_EDITOR_DESTROYED; } AutoPlaceholderBatch treatAsOneTransaction( *this, ScrollSelectionIntoView::Yes, __FUNCTION__); IgnoredErrorResult ignoredError; AutoEditSubActionNotifier startToHandleEditSubAction( *this, EditSubAction::eInsertHTMLSource, nsIEditor::eNext, ignoredError); if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) { return ignoredError.StealNSResult(); } NS_WARNING_ASSERTION( !ignoredError.Failed(), "HTMLEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored"); nsresult rv = EnsureNoPaddingBRElementForEmptyEditor(); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::EnsureNoPaddingBRElementForEmptyEditor() failed"); return rv; } // Delete Selection, but only if it isn't collapsed, see bug #106269 if (!SelectionRef().IsCollapsed()) { nsresult rv = DeleteSelectionAsSubAction(eNone, eStrip); if (NS_FAILED(rv)) { NS_WARNING( "EditorBase::DeleteSelectionAsSubAction(eNone, eStrip) failed"); return rv; } } // Get the first range in the selection, for context: RefPtr range = SelectionRef().GetRangeAt(0); if (NS_WARN_IF(!range)) { return NS_ERROR_FAILURE; } // Create fragment for pasted HTML. ErrorResult error; RefPtr documentFragment = range->CreateContextualFragment(aInputString, error); if (error.Failed()) { NS_WARNING("nsRange::CreateContextualFragment() failed"); return error.StealNSResult(); } // Put the fragment into the document at start of selection. EditorDOMPoint pointToInsert(range->StartRef()); // XXX We need to make pointToInsert store offset for keeping traditional // behavior since using only child node to pointing insertion point // changes the behavior when inserted child is moved by mutation // observer. We need to investigate what we should do here. Unused << pointToInsert.Offset(); EditorDOMPoint pointToPutCaret; for (nsCOMPtr contentToInsert = documentFragment->GetFirstChild(); contentToInsert; contentToInsert = documentFragment->GetFirstChild()) { Result insertChildContentNodeResult = InsertNodeWithTransaction(*contentToInsert, pointToInsert); if (MOZ_UNLIKELY(insertChildContentNodeResult.isErr())) { NS_WARNING("EditorBase::InsertNodeWithTransaction() failed"); return insertChildContentNodeResult.unwrapErr(); } CreateContentResult unwrappedInsertChildContentNodeResult = insertChildContentNodeResult.unwrap(); unwrappedInsertChildContentNodeResult.MoveCaretPointTo( pointToPutCaret, *this, {SuggestCaret::OnlyIfHasSuggestion, SuggestCaret::OnlyIfTransactionsAllowedToDoIt}); // XXX If the inserted node has been moved by mutation observer, // incrementing offset will cause odd result. Next new node // will be inserted after existing node and the offset will be // overflown from the container node. pointToInsert.Set(pointToInsert.GetContainer(), pointToInsert.Offset() + 1); if (NS_WARN_IF(!pointToInsert.Offset())) { // Append the remaining children to the container if offset is // overflown. pointToInsert.SetToEndOf(pointToInsert.GetContainer()); } } if (pointToPutCaret.IsSet()) { nsresult rv = CollapseSelectionTo(pointToPutCaret); if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) { NS_WARNING("EditorBase::CollapseSelectionTo() failed, but ignored"); return NS_ERROR_EDITOR_DESTROYED; } NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "EditorBase::CollapseSelectionTo() failed, but ignored"); } return NS_OK; } NS_IMETHODIMP HTMLEditor::InsertHTML(const nsAString& aInString) { nsresult rv = InsertHTMLAsAction(aInString); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::InsertHTMLAsAction() failed"); return rv; } nsresult HTMLEditor::InsertHTMLAsAction(const nsAString& aInString, nsIPrincipal* aPrincipal) { // FIXME: This should keep handling inserting HTML if the caller is // nsIHTMLEditor::InsertHTML. if (IsReadonly()) { return NS_OK; } AutoEditActionDataSetter editActionData(*this, EditAction::eInsertHTML, aPrincipal); nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent(); if (NS_FAILED(rv)) { NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED, "CanHandleAndMaybeDispatchBeforeInputEvent(), failed"); return EditorBase::ToGenericNSResult(rv); } AutoPlaceholderBatch treatAsOneTransaction( *this, ScrollSelectionIntoView::Yes, __FUNCTION__); rv = InsertHTMLWithContextAsSubAction(aInString, u""_ns, u""_ns, u""_ns, SafeToInsertData::Yes, EditorDOMPoint(), DeleteSelectedContent::Yes, InlineStylesAtInsertionPoint::Clear); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::InsertHTMLWithContextAsSubAction(" "SafeToInsertData::Yes, DeleteSelectedContent::Yes, " "InlineStylesAtInsertionPoint::Clear) failed"); return EditorBase::ToGenericNSResult(rv); } class MOZ_STACK_CLASS HTMLEditor::HTMLWithContextInserter final { public: MOZ_CAN_RUN_SCRIPT explicit HTMLWithContextInserter(HTMLEditor& aHTMLEditor) : mHTMLEditor(aHTMLEditor) {} HTMLWithContextInserter() = delete; HTMLWithContextInserter(const HTMLWithContextInserter&) = delete; HTMLWithContextInserter(HTMLWithContextInserter&&) = delete; [[nodiscard]] MOZ_CAN_RUN_SCRIPT Result Run( const nsAString& aInputString, const nsAString& aContextStr, const nsAString& aInfoStr, SafeToInsertData aSafeToInsertData, InlineStylesAtInsertionPoint aInlineStylesAtInsertionPoint); private: class FragmentFromPasteCreator; class FragmentParser; /** * CollectTopMostChildContentsCompletelyInRange() collects topmost child * contents which are completely in the given range. * For example, if the range points a node with its container node, the * result is only the node (meaning does not include its descendants). * If the range starts start of a node and ends end of it, and if the node * does not have children, returns no nodes, otherwise, if the node has * some children, the result includes its all children (not including their * descendants). * * @param aStartPoint Start point of the range. * @param aEndPoint End point of the range. * @param aOutArrayOfContents [Out] Topmost children which are completely in * the range. */ static void CollectTopMostChildContentsCompletelyInRange( const EditorRawDOMPoint& aStartPoint, const EditorRawDOMPoint& aEndPoint, nsTArray>& aOutArrayOfContents); /** * @return nullptr, if there's no invisible `
`. */ HTMLBRElement* GetInvisibleBRElementAtPoint( const EditorDOMPoint& aPointToInsert) const; EditorDOMPoint GetNewCaretPointAfterInsertingHTML( const EditorDOMPoint& aLastInsertedPoint) const; /** * @return error result or the last inserted point. The latter is only set, if * content was inserted. */ [[nodiscard]] MOZ_CAN_RUN_SCRIPT Result InsertContents( const EditorDOMPoint& aPointToInsert, nsTArray>& aArrayOfTopMostChildContents, const nsINode* aFragmentAsNode); /** * @param aContextStr as indicated by nsITransferable's kHTMLContext. * @param aInfoStr as indicated by nsITransferable's kHTMLInfo. */ nsresult CreateDOMFragmentFromPaste( const nsAString& aInputString, const nsAString& aContextStr, const nsAString& aInfoStr, nsCOMPtr* aOutFragNode, nsCOMPtr* aOutStartNode, nsCOMPtr* aOutEndNode, uint32_t* aOutStartOffset, uint32_t* aOutEndOffset, SafeToInsertData aSafeToInsertData) const; [[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult MoveCaretOutsideOfLink( Element& aLinkElement, const EditorDOMPoint& aPointToPutCaret); // MOZ_KNOWN_LIVE because this is set only by the constructor which is // marked as MOZ_CAN_RUN_SCRIPT and this is allocated only in the stack. MOZ_KNOWN_LIVE HTMLEditor& mHTMLEditor; }; class MOZ_STACK_CLASS HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator final { public: nsresult Run(const Document& aDocument, const nsAString& aInputString, const nsAString& aContextStr, const nsAString& aInfoStr, nsCOMPtr* aOutFragNode, nsCOMPtr* aOutStartNode, nsCOMPtr* aOutEndNode, SafeToInsertData aSafeToInsertData) const; private: nsresult CreateDocumentFragmentAndGetParentOfPastedHTMLInContext( const Document& aDocument, const nsAString& aInputString, const nsAString& aContextStr, SafeToInsertData aSafeToInsertData, nsCOMPtr& aParentNodeOfPastedHTMLInContext, RefPtr& aDocumentFragmentToInsert) const; static nsAtom* DetermineContextLocalNameForParsingPastedHTML( const nsIContent* aParentContentOfPastedHTMLInContext); static bool FindTargetNodeOfContextForPastedHTMLAndRemoveInsertionCookie( nsINode& aStart, nsCOMPtr& aResult); static bool IsInsertionCookie(const nsIContent& aContent); /** * @param aDocumentFragmentForContext contains the merged result. */ static nsresult MergeAndPostProcessFragmentsForPastedHTMLAndContext( DocumentFragment& aDocumentFragmentForPastedHTML, DocumentFragment& aDocumentFragmentForContext, nsIContent& aTargetContentOfContextForPastedHTML); /** * @param aInfoStr as indicated by nsITransferable's kHTMLInfo. */ [[nodiscard]] static nsresult MoveStartAndEndAccordingToHTMLInfo( const nsAString& aInfoStr, nsCOMPtr* aOutStartNode, nsCOMPtr* aOutEndNode); static nsresult PostProcessFragmentForPastedHTMLWithoutContext( DocumentFragment& aDocumentFragmentForPastedHTML); static nsresult PreProcessContextDocumentFragmentForMerging( DocumentFragment& aDocumentFragmentForContext); static void RemoveHeadChildAndStealBodyChildsChildren(nsINode& aNode); /** * This is designed for a helper class to remove disturbing nodes at inserting * the HTML fragment into the DOM tree. This walks the children and if some * elements do not have enough children, e.g., list elements not having * another visible list elements nor list item elements, * will be removed. * * @param aNode Should not be a node whose mutation may be observed by * JS. */ static void RemoveIncompleteDescendantsFromInsertingFragment(nsINode& aNode); enum class NodesToRemove { eAll, eOnlyListItems /*!< List items are always block-level elements, hence such whitespace-only nodes are always invisible. */ }; static nsresult RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces( nsIContent& aNode, NodesToRemove aNodesToRemove); }; HTMLBRElement* HTMLEditor::HTMLWithContextInserter::GetInvisibleBRElementAtPoint( const EditorDOMPoint& aPointToInsert) const { WSRunScanner wsRunScannerAtInsertionPoint( mHTMLEditor.ComputeEditingHost(), aPointToInsert, BlockInlineCheck::UseComputedDisplayStyle); if (wsRunScannerAtInsertionPoint.EndsByInvisibleBRElement()) { return wsRunScannerAtInsertionPoint.EndReasonBRElementPtr(); } return nullptr; } EditorDOMPoint HTMLEditor::HTMLWithContextInserter::GetNewCaretPointAfterInsertingHTML( const EditorDOMPoint& aLastInsertedPoint) const { EditorDOMPoint pointToPutCaret; // but don't cross tables nsIContent* containerContent = nullptr; if (!HTMLEditUtils::IsTable(aLastInsertedPoint.GetChild())) { containerContent = HTMLEditUtils::GetLastLeafContent( *aLastInsertedPoint.GetChild(), {LeafNodeType::OnlyEditableLeafNode}, BlockInlineCheck::Unused, aLastInsertedPoint.GetChild()->GetAsElementOrParentElement()); if (containerContent) { Element* mostDistantInclusiveAncestorTableElement = nullptr; for (Element* maybeTableElement = containerContent->GetAsElementOrParentElement(); maybeTableElement && maybeTableElement != aLastInsertedPoint.GetChild(); maybeTableElement = maybeTableElement->GetParentElement()) { if (HTMLEditUtils::IsTable(maybeTableElement)) { mostDistantInclusiveAncestorTableElement = maybeTableElement; } } // If we're in table elements, we should put caret into the most ancestor // table element. if (mostDistantInclusiveAncestorTableElement) { containerContent = mostDistantInclusiveAncestorTableElement; } } } // If we are not in table elements, we should put caret in the last inserted // node. if (!containerContent) { containerContent = aLastInsertedPoint.GetChild(); } // If the container is a text node or a container element except `` // element, put caret a end of it. if (containerContent->IsText() || (HTMLEditUtils::IsContainerNode(*containerContent) && !HTMLEditUtils::IsTable(containerContent))) { pointToPutCaret.SetToEndOf(containerContent); } // Otherwise, i.e., it's an atomic element, `
` element or data node, // put caret after it. else { pointToPutCaret.Set(containerContent); DebugOnly advanced = pointToPutCaret.AdvanceOffset(); NS_WARNING_ASSERTION(advanced, "Failed to advance offset from found node"); } // Make sure we don't end up with selection collapsed after an invisible // `
` element. Element* editingHost = mHTMLEditor.ComputeEditingHost(); WSRunScanner wsRunScannerAtCaret(editingHost, pointToPutCaret, BlockInlineCheck::UseComputedDisplayStyle); if (wsRunScannerAtCaret .ScanPreviousVisibleNodeOrBlockBoundaryFrom(pointToPutCaret) .ReachedInvisibleBRElement()) { WSRunScanner wsRunScannerAtStartReason( editingHost, EditorDOMPoint(wsRunScannerAtCaret.GetStartReasonContent()), BlockInlineCheck::UseComputedDisplayStyle); const WSScanResult backwardScanFromPointToCaretResult = wsRunScannerAtStartReason.ScanPreviousVisibleNodeOrBlockBoundaryFrom( pointToPutCaret); if (backwardScanFromPointToCaretResult.InVisibleOrCollapsibleCharacters()) { pointToPutCaret = backwardScanFromPointToCaretResult .PointAfterReachedContent(); } else if (backwardScanFromPointToCaretResult.ReachedSpecialContent()) { // XXX In my understanding, this is odd. The end reason may not be // same as the reached special content because the equality is // guaranteed only when ReachedCurrentBlockBoundary() returns true. // However, looks like that this code assumes that // GetStartReasonContent() returns the content. NS_ASSERTION(wsRunScannerAtStartReason.GetStartReasonContent() == backwardScanFromPointToCaretResult.GetContent(), "Start reason is not the reached special content"); pointToPutCaret.SetAfter( wsRunScannerAtStartReason.GetStartReasonContent()); } } return pointToPutCaret; } nsresult HTMLEditor::InsertHTMLWithContextAsSubAction( const nsAString& aInputString, const nsAString& aContextStr, const nsAString& aInfoStr, const nsAString& aFlavor, SafeToInsertData aSafeToInsertData, const EditorDOMPoint& aPointToInsert, DeleteSelectedContent aDeleteSelectedContent, InlineStylesAtInsertionPoint aInlineStylesAtInsertionPoint) { MOZ_ASSERT(IsEditActionDataAvailable()); if (NS_WARN_IF(!mInitSucceeded)) { return NS_ERROR_NOT_INITIALIZED; } CommitComposition(); IgnoredErrorResult ignoredError; AutoEditSubActionNotifier startToHandleEditSubAction( *this, EditSubAction::ePasteHTMLContent, nsIEditor::eNext, ignoredError); if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) { return ignoredError.StealNSResult(); } NS_WARNING_ASSERTION( !ignoredError.Failed(), "HTMLEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored"); ignoredError.SuppressException(); { Result result = CanHandleHTMLEditSubAction(); if (MOZ_UNLIKELY(result.isErr())) { NS_WARNING("HTMLEditor::CanHandleHTMLEditSubAction() failed"); return result.unwrapErr(); } if (result.inspect().Canceled()) { return NS_OK; } } // If we have a destination / target node, we want to insert there rather than // in place of the selection. Ignore aDeleteSelectedContent here if // aPointToInsert is not set since deletion will also occur later in // HTMLWithContextInserter and will be collapsed around there; this block // is intended to cover the various scenarios where we are dropping in an // editor (and may want to delete the selection before collapsing the // selection in the new destination) if (aPointToInsert.IsSet()) { nsresult rv = PrepareToInsertContent(aPointToInsert, aDeleteSelectedContent); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::PrepareToInsertContent() failed"); return rv; } aDeleteSelectedContent = DeleteSelectedContent::No; } HTMLWithContextInserter htmlWithContextInserter(*this); Result result = htmlWithContextInserter.Run( aInputString, aContextStr, aInfoStr, aSafeToInsertData, aInlineStylesAtInsertionPoint); if (MOZ_UNLIKELY(result.isErr())) { return result.unwrapErr(); } // If nothing is inserted and delete selection is required, we need to // delete selection right now. if (result.inspect().Ignored() && aDeleteSelectedContent == DeleteSelectedContent::Yes) { nsresult rv = DeleteSelectionAsSubAction(eNone, eStrip); if (NS_FAILED(rv)) { NS_WARNING( "EditorBase::DeleteSelectionAsSubAction(eNone, eStrip) failed"); return rv; } } return NS_OK; } Result HTMLEditor::HTMLWithContextInserter::Run( const nsAString& aInputString, const nsAString& aContextStr, const nsAString& aInfoStr, SafeToInsertData aSafeToInsertData, InlineStylesAtInsertionPoint aInlineStylesAtInsertionPoint) { MOZ_ASSERT(mHTMLEditor.IsEditActionDataAvailable()); // create a dom document fragment that represents the structure to paste nsCOMPtr fragmentAsNode, streamStartParent, streamEndParent; uint32_t streamStartOffset = 0, streamEndOffset = 0; nsresult rv = CreateDOMFragmentFromPaste( aInputString, aContextStr, aInfoStr, address_of(fragmentAsNode), address_of(streamStartParent), address_of(streamEndParent), &streamStartOffset, &streamEndOffset, aSafeToInsertData); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::CreateDOMFragmentFromPaste() " "failed"); return Err(rv); } // we need to recalculate various things based on potentially new offsets // this is work to be completed at a later date (probably by jfrancis) AutoTArray, 64> arrayOfTopMostChildContents; // If we have stream start point information, lets use it and end point. // Otherwise, we should make a range all over the document fragment. EditorRawDOMPoint streamStartPoint = streamStartParent ? EditorRawDOMPoint(streamStartParent, AssertedCast(streamStartOffset)) : EditorRawDOMPoint(fragmentAsNode, 0); EditorRawDOMPoint streamEndPoint = streamStartParent ? EditorRawDOMPoint(streamEndParent, streamEndOffset) : EditorRawDOMPoint::AtEndOf(fragmentAsNode); Unused << streamStartPoint; Unused << streamEndPoint; HTMLWithContextInserter::CollectTopMostChildContentsCompletelyInRange( EditorRawDOMPoint(streamStartParent, AssertedCast(streamStartOffset)), EditorRawDOMPoint(streamEndParent, AssertedCast(streamEndOffset)), arrayOfTopMostChildContents); if (arrayOfTopMostChildContents.IsEmpty()) { return EditActionResult::IgnoredResult(); // Nothing to insert. } // Are there any table elements in the list? // check for table cell selection mode bool cellSelectionMode = HTMLEditUtils::IsInTableCellSelectionMode(mHTMLEditor.SelectionRef()); if (cellSelectionMode) { // do we have table content to paste? If so, we want to delete // the selected table cells and replace with new table elements; // but if not we want to delete _contents_ of cells and replace // with non-table elements. Use cellSelectionMode bool to // indicate results. if (!HTMLEditUtils::IsAnyTableElement(arrayOfTopMostChildContents[0])) { cellSelectionMode = false; } } if (!cellSelectionMode) { rv = mHTMLEditor.DeleteSelectionAndPrepareToCreateNode(); if (NS_FAILED(rv)) { NS_WARNING("HTMLEditor::DeleteSelectionAndPrepareToCreateNode() failed"); return Err(rv); } if (aInlineStylesAtInsertionPoint == InlineStylesAtInsertionPoint::Clear) { // pasting does not inherit local inline styles Result pointToPutCaretOrError = mHTMLEditor.ClearStyleAt( EditorDOMPoint(mHTMLEditor.SelectionRef().AnchorRef()), EditorInlineStyle::RemoveAllStyles(), SpecifiedStyle::Preserve); if (MOZ_UNLIKELY(pointToPutCaretOrError.isErr())) { NS_WARNING("HTMLEditor::ClearStyleAt() failed"); return pointToPutCaretOrError.propagateErr(); } if (pointToPutCaretOrError.inspect().IsSetAndValid()) { nsresult rv = mHTMLEditor.CollapseSelectionTo(pointToPutCaretOrError.unwrap()); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::CollapseSelectionTo() failed"); return Err(rv); } } } } else { // Delete whole cells: we will replace with new table content. // Braces for artificial block to scope AutoSelectionRestorer. // Save current selection since DeleteTableCellWithTransaction() perturbs // it. { AutoSelectionRestorer restoreSelectionLater(mHTMLEditor); rv = mHTMLEditor.DeleteTableCellWithTransaction(1); if (NS_FAILED(rv)) { NS_WARNING("HTMLEditor::DeleteTableCellWithTransaction(1) failed"); return Err(rv); } } // collapse selection to beginning of deleted table content IgnoredErrorResult ignoredError; mHTMLEditor.SelectionRef().CollapseToStart(ignoredError); NS_WARNING_ASSERTION(!ignoredError.Failed(), "Selection::Collapse() failed, but ignored"); } { Result result = mHTMLEditor.CanHandleHTMLEditSubAction(); if (MOZ_UNLIKELY(result.isErr())) { NS_WARNING("HTMLEditor::CanHandleHTMLEditSubAction() failed"); return result; } if (result.inspect().Canceled()) { return result; } } mHTMLEditor.UndefineCaretBidiLevel(); rv = mHTMLEditor.EnsureNoPaddingBRElementForEmptyEditor(); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::EnsureNoPaddingBRElementForEmptyEditor() " "failed, but ignored"); if (NS_SUCCEEDED(rv) && mHTMLEditor.SelectionRef().IsCollapsed()) { nsresult rv = mHTMLEditor.EnsureCaretNotAfterInvisibleBRElement(); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::EnsureCaretNotAfterInvisibleBRElement() " "failed, but ignored"); if (NS_SUCCEEDED(rv)) { nsresult rv = mHTMLEditor.PrepareInlineStylesForCaret(); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "HTMLEditor::PrepareInlineStylesForCaret() failed, but ignored"); } } Element* editingHost = mHTMLEditor.ComputeEditingHost(HTMLEditor::LimitInBodyElement::No); if (NS_WARN_IF(!editingHost)) { return Err(NS_ERROR_FAILURE); } // Adjust position based on the first node we are going to insert. EditorDOMPoint pointToInsert = HTMLEditUtils::GetBetterInsertionPointFor( arrayOfTopMostChildContents[0], mHTMLEditor.GetFirstSelectionStartPoint(), *editingHost); if (!pointToInsert.IsSet()) { NS_WARNING("HTMLEditor::GetBetterInsertionPointFor() failed"); return Err(NS_ERROR_FAILURE); } // Remove invisible `
` element at the point because if there is a `
` // element at end of what we paste, it will make the existing invisible // `
` element visible. if (HTMLBRElement* invisibleBRElement = GetInvisibleBRElementAtPoint(pointToInsert)) { AutoEditorDOMPointChildInvalidator lockOffset(pointToInsert); nsresult rv = mHTMLEditor.DeleteNodeWithTransaction( MOZ_KnownLive(*invisibleBRElement)); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed."); return Err(rv); } } const bool insertionPointWasInLink = !!HTMLEditor::GetLinkElement(pointToInsert.GetContainer()); if (pointToInsert.IsInTextNode()) { Result splitNodeResult = mHTMLEditor.SplitNodeDeepWithTransaction( MOZ_KnownLive(*pointToInsert.ContainerAs()), pointToInsert, SplitAtEdges::eAllowToCreateEmptyContainer); if (MOZ_UNLIKELY(splitNodeResult.isErr())) { NS_WARNING("HTMLEditor::SplitNodeDeepWithTransaction() failed"); return splitNodeResult.propagateErr(); } nsresult rv = splitNodeResult.inspect().SuggestCaretPointTo( mHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion, SuggestCaret::OnlyIfTransactionsAllowedToDoIt}); if (NS_FAILED(rv)) { NS_WARNING("SplitNodeResult::SuggestCaretPointTo() failed"); return Err(rv); } pointToInsert = splitNodeResult.inspect().AtSplitPoint(); if (MOZ_UNLIKELY(!pointToInsert.IsSet())) { NS_WARNING( "HTMLEditor::SplitNodeDeepWithTransaction() didn't return split " "point"); return Err(NS_ERROR_FAILURE); } } { // Block only for AutoHTMLFragmentBoundariesFixer to hide it from the // following code. Note that it may modify arrayOfTopMostChildContents. AutoHTMLFragmentBoundariesFixer fixPiecesOfTablesAndLists( arrayOfTopMostChildContents); } MOZ_ASSERT(pointToInsert.GetContainer()->GetChildAt_Deprecated( pointToInsert.Offset()) == pointToInsert.GetChild()); Result lastInsertedPoint = InsertContents( pointToInsert, arrayOfTopMostChildContents, fragmentAsNode); if (lastInsertedPoint.isErr()) { NS_WARNING("HTMLWithContextInserter::InsertContents() failed."); return lastInsertedPoint.propagateErr(); } mHTMLEditor.TopLevelEditSubActionDataRef().mNeedsToCleanUpEmptyElements = false; if (MOZ_UNLIKELY(!lastInsertedPoint.inspect().IsInComposedDoc())) { return EditActionResult::HandledResult(); } const EditorDOMPoint pointToPutCaret = GetNewCaretPointAfterInsertingHTML(lastInsertedPoint.inspect()); // Now collapse the selection to the end of what we just inserted. rv = mHTMLEditor.CollapseSelectionTo(pointToPutCaret); if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) { NS_WARNING( "EditorBase::CollapseSelectionTo() caused destroying the editor"); return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::CollapseSelectionTo() failed, but ignored"); // If we didn't start from an `` element, we should not keep // caret in the link to make users type something outside the link. if (insertionPointWasInLink) { return EditActionResult::HandledResult(); } RefPtr linkElement = GetLinkElement(pointToPutCaret.GetContainer()); if (!linkElement) { return EditActionResult::HandledResult(); } rv = MoveCaretOutsideOfLink(*linkElement, pointToPutCaret); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::MoveCaretOutsideOfLink " "failed."); return Err(rv); } return EditActionResult::HandledResult(); } Result HTMLEditor::HTMLWithContextInserter::InsertContents( const EditorDOMPoint& aPointToInsert, nsTArray>& aArrayOfTopMostChildContents, const nsINode* aFragmentAsNode) { MOZ_ASSERT(aPointToInsert.IsSetAndValidInComposedDoc()); EditorDOMPoint pointToInsert{aPointToInsert}; // Loop over the node list and paste the nodes: const RefPtr maybeNonEditableBlockElement = pointToInsert.IsInContentNode() ? HTMLEditUtils::GetInclusiveAncestorElement( *pointToInsert.ContainerAs(), HTMLEditUtils::ClosestBlockElement, BlockInlineCheck::UseComputedDisplayOutsideStyle) : nullptr; EditorDOMPoint lastInsertedPoint; nsCOMPtr insertedContextParentContent; for (OwningNonNull& content : aArrayOfTopMostChildContents) { if (NS_WARN_IF(content == aFragmentAsNode) || NS_WARN_IF(content->IsHTMLElement(nsGkAtoms::body))) { return Err(NS_ERROR_FAILURE); } if (insertedContextParentContent) { // If we had to insert something higher up in the paste hierarchy, // we want to skip any further paste nodes that descend from that. // Else we will paste twice. // XXX This check may be really expensive. Cannot we check whether // the node's `ownerDocument` is the `aFragmentAsNode` or not? // XXX If content was moved to outside of insertedContextParentContent // by mutation event listeners, we will anyway duplicate it. if (EditorUtils::IsDescendantOf(*content, *insertedContextParentContent)) { continue; } } // If a `
` or `` element on the clipboard, and pasting it into // a `
` or `` element, insert only the appropriate children // instead. bool inserted = false; if (HTMLEditUtils::IsTableRow(content) && HTMLEditUtils::IsTableRow(pointToInsert.GetContainer()) && (HTMLEditUtils::IsTable(content) || HTMLEditUtils::IsTable(pointToInsert.GetContainer()))) { // Move children of current node to the insertion point. AutoTArray, 24> children; HTMLEditUtils::CollectAllChildren(*content, children); EditorDOMPoint pointToPutCaret; for (const OwningNonNull& child : children) { // MOZ_KnownLive(child) because of bug 1622253 Result moveChildResult = mHTMLEditor.InsertNodeIntoProperAncestorWithTransaction( MOZ_KnownLive(child), pointToInsert, SplitAtEdges::eDoNotCreateEmptyContainer); if (MOZ_UNLIKELY(moveChildResult.isErr())) { // If moving node is moved to different place, we should ignore // this result and keep trying to insert next content node to same // position. if (moveChildResult.inspectErr() == NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE) { inserted = true; continue; // the inner `for` loop } NS_WARNING( "HTMLEditor::InsertNodeIntoProperAncestorWithTransaction(" "SplitAtEdges::eDoNotCreateEmptyContainer) failed, maybe " "ignored"); break; // from the inner `for` loop } if (MOZ_UNLIKELY(!moveChildResult.inspect().Handled())) { continue; } inserted = true; lastInsertedPoint.Set(child); pointToInsert = lastInsertedPoint.NextPoint(); MOZ_ASSERT(pointToInsert.IsSetAndValidInComposedDoc()); CreateContentResult unwrappedMoveChildResult = moveChildResult.unwrap(); unwrappedMoveChildResult.MoveCaretPointTo( pointToPutCaret, mHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion, SuggestCaret::OnlyIfTransactionsAllowedToDoIt}); } // end of the inner `for` loop if (pointToPutCaret.IsSet()) { nsresult rv = mHTMLEditor.CollapseSelectionTo(pointToPutCaret); if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) { NS_WARNING( "EditorBase::CollapseSelectionTo() caused destroying the editor"); return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "EditorBase::CollapseSelectionTo() failed, but ignored"); } } // If a list element on the clipboard, and pasting it into a list or // list item element, insert the appropriate children instead. I.e., // merge the list elements instead of pasting as a sublist. else if (HTMLEditUtils::IsAnyListElement(content) && (HTMLEditUtils::IsAnyListElement(pointToInsert.GetContainer()) || HTMLEditUtils::IsListItem(pointToInsert.GetContainer()))) { AutoTArray, 24> children; HTMLEditUtils::CollectAllChildren(*content, children); EditorDOMPoint pointToPutCaret; for (const OwningNonNull& child : children) { if (HTMLEditUtils::IsListItem(child) || HTMLEditUtils::IsAnyListElement(child)) { // If we're pasting into empty list item, we should remove it // and past current node into the parent list directly. // XXX This creates invalid structure if current list item element // is not proper child of the parent element, or current node // is a list element. if (HTMLEditUtils::IsListItem(pointToInsert.GetContainer()) && HTMLEditUtils::IsEmptyNode( *pointToInsert.GetContainer(), {EmptyCheckOption::TreatNonEditableContentAsInvisible})) { NS_WARNING_ASSERTION(pointToInsert.GetContainerParent(), "Insertion point is out of the DOM tree"); if (pointToInsert.GetContainerParent()) { pointToInsert.Set(pointToInsert.GetContainer()); MOZ_ASSERT(pointToInsert.IsSetAndValidInComposedDoc()); AutoEditorDOMPointChildInvalidator lockOffset(pointToInsert); nsresult rv = mHTMLEditor.DeleteNodeWithTransaction( MOZ_KnownLive(*pointToInsert.GetChild())); if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) { NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed"); return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::DeleteNodeWithTransaction() " "failed, but ignored"); } } // MOZ_KnownLive(child) because of bug 1622253 Result moveChildResult = mHTMLEditor .InsertNodeIntoProperAncestorWithTransaction( MOZ_KnownLive(child), pointToInsert, SplitAtEdges::eDoNotCreateEmptyContainer); if (MOZ_UNLIKELY(moveChildResult.isErr())) { // If moving node is moved to different place, we should ignore // this result and keep trying to insert next content node to // same position. if (moveChildResult.inspectErr() == NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE) { inserted = true; continue; // the inner `for` loop } if (NS_WARN_IF(moveChildResult.inspectErr() == NS_ERROR_EDITOR_DESTROYED)) { return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING( "HTMLEditor::InsertNodeIntoProperAncestorWithTransaction(" "SplitAtEdges::eDoNotCreateEmptyContainer) failed, but maybe " "ignored"); break; // from the inner `for` loop } if (MOZ_UNLIKELY(!moveChildResult.inspect().Handled())) { continue; } inserted = true; lastInsertedPoint.Set(child); pointToInsert = lastInsertedPoint.NextPoint(); MOZ_ASSERT(pointToInsert.IsSetAndValidInComposedDoc()); CreateContentResult unwrappedMoveChildResult = moveChildResult.unwrap(); unwrappedMoveChildResult.MoveCaretPointTo( pointToPutCaret, mHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion, SuggestCaret::OnlyIfTransactionsAllowedToDoIt}); } // If the child of current node is not list item nor list element, // we should remove it from the DOM tree. else if (HTMLEditUtils::IsRemovableNode(child)) { AutoEditorDOMPointChildInvalidator lockOffset(pointToInsert); IgnoredErrorResult ignoredError; content->RemoveChild(child, ignoredError); if (MOZ_UNLIKELY(mHTMLEditor.Destroyed())) { NS_WARNING( "nsIContent::RemoveChild() caused destroying the editor"); return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING_ASSERTION(!ignoredError.Failed(), "nsINode::RemoveChild() failed, but ignored"); } else { NS_WARNING( "Failed to delete the first child of a list element because the " "list element non-editable"); break; // from the inner `for` loop } } // end of the inner `for` loop if (MOZ_UNLIKELY(mHTMLEditor.Destroyed())) { NS_WARNING("The editor has been destroyed"); return Err(NS_ERROR_EDITOR_DESTROYED); } if (pointToPutCaret.IsSet()) { nsresult rv = mHTMLEditor.CollapseSelectionTo(pointToPutCaret); if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) { NS_WARNING( "EditorBase::CollapseSelectionTo() caused destroying the editor"); return Err(NS_ERROR_EDITOR_DESTROYED); } NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "EditorBase::CollapseSelectionTo() failed, but ignored"); } } // If pasting into a `
` element and current node is a `
` element,
    // move only its children.
    else if (HTMLEditUtils::IsPre(maybeNonEditableBlockElement) &&
             HTMLEditUtils::IsPre(content)) {
      // Check for pre's going into pre's.
      AutoTArray, 24> children;
      HTMLEditUtils::CollectAllChildren(*content, children);
      EditorDOMPoint pointToPutCaret;
      for (const OwningNonNull& child : children) {
        // MOZ_KnownLive(child) because of bug 1622253
        Result moveChildResult =
            mHTMLEditor.InsertNodeIntoProperAncestorWithTransaction(
                MOZ_KnownLive(child), pointToInsert,
                SplitAtEdges::eDoNotCreateEmptyContainer);
        if (MOZ_UNLIKELY(moveChildResult.isErr())) {
          // If moving node is moved to different place, we should ignore
          // this result and keep trying to insert next content node there.
          if (moveChildResult.inspectErr() ==
              NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE) {
            inserted = true;
            continue;  // the inner `for` loop
          }
          if (NS_WARN_IF(moveChildResult.inspectErr() ==
                         NS_ERROR_EDITOR_DESTROYED)) {
            return moveChildResult.propagateErr();
          }
          NS_WARNING(
              "HTMLEditor::InsertNodeIntoProperAncestorWithTransaction("
              "SplitAtEdges::eDoNotCreateEmptyContainer) failed, but maybe "
              "ignored");
          break;  // from the inner `for` loop
        }
        if (MOZ_UNLIKELY(!moveChildResult.inspect().Handled())) {
          continue;
        }
        CreateContentResult unwrappedMoveChildResult = moveChildResult.unwrap();
        inserted = true;
        lastInsertedPoint.Set(child);
        pointToInsert = lastInsertedPoint.NextPoint();
        MOZ_ASSERT(pointToInsert.IsSetAndValidInComposedDoc());
        unwrappedMoveChildResult.MoveCaretPointTo(
            pointToPutCaret, mHTMLEditor,
            {SuggestCaret::OnlyIfHasSuggestion,
             SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
      }  // end of the inner `for` loop

      if (pointToPutCaret.IsSet()) {
        nsresult rv = mHTMLEditor.CollapseSelectionTo(pointToPutCaret);
        if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
          NS_WARNING(
              "EditorBase::CollapseSelectionTo() caused destroying the editor");
          return Err(NS_ERROR_EDITOR_DESTROYED);
        }
        NS_WARNING_ASSERTION(
            NS_SUCCEEDED(rv),
            "EditorBase::CollapseSelectionTo() failed, but ignored");
      }
    }

    // TODO: For making the above code clearer, we should move this fallback
    //       path into a lambda and call it in each if/else-if block.
    // If we haven't inserted current node nor its children, move current node
    // to the insertion point.
    if (!inserted) {
      // MOZ_KnownLive(content) because 'aArrayOfTopMostChildContents' is
      // guaranteed to keep it alive.
      Result moveContentResult =
          mHTMLEditor.InsertNodeIntoProperAncestorWithTransaction(
              MOZ_KnownLive(content), pointToInsert,
              SplitAtEdges::eDoNotCreateEmptyContainer);
      if (MOZ_LIKELY(moveContentResult.isOk())) {
        if (MOZ_UNLIKELY(!moveContentResult.inspect().Handled())) {
          continue;
        }
        lastInsertedPoint.Set(content);
        pointToInsert = lastInsertedPoint;
        MOZ_ASSERT(pointToInsert.IsSetAndValidInComposedDoc());
        nsresult rv = moveContentResult.inspect().SuggestCaretPointTo(
            mHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
                          SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
                          SuggestCaret::AndIgnoreTrivialError});
        if (NS_FAILED(rv)) {
          NS_WARNING("CreateContentResult::SuggestCaretPointTo() failed");
          return Err(rv);
        }
        NS_WARNING_ASSERTION(
            rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
            "CreateContentResult::SuggestCaretPointTo() failed, but ignored");
      } else if (moveContentResult.inspectErr() ==
                 NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE) {
        // Moving node is moved to different place, we should keep trying to
        // insert the next content to same position.
      } else {
        NS_WARNING(
            "HTMLEditor::InsertNodeIntoProperAncestorWithTransaction("
            "SplitAtEdges::eDoNotCreateEmptyContainer) failed, but ignored");
        // Assume failure means no legal parent in the document hierarchy,
        // try again with the parent of content in the paste hierarchy.
        // FYI: We cannot use `InclusiveAncestorOfType` here because of
        //      calling `InsertNodeIntoProperAncestorWithTransaction()`.
        for (nsCOMPtr childContent = content; childContent;
             childContent = childContent->GetParent()) {
          if (NS_WARN_IF(!childContent->GetParent()) ||
              NS_WARN_IF(
                  childContent->GetParent()->IsHTMLElement(nsGkAtoms::body))) {
            break;  // for the inner `for` loop
          }
          const OwningNonNull oldParentContent =
              *childContent->GetParent();
          Result moveParentResult =
              mHTMLEditor
                  .InsertNodeIntoProperAncestorWithTransaction(
                      oldParentContent, pointToInsert,
                      SplitAtEdges::eDoNotCreateEmptyContainer);
          if (MOZ_UNLIKELY(moveParentResult.isErr())) {
            // Moving node is moved to different place, we should keep trying to
            // insert the next content to same position.
            if (moveParentResult.inspectErr() ==
                NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE) {
              break;  // from the inner `for` loop
            }
            if (NS_WARN_IF(moveParentResult.inspectErr() ==
                           NS_ERROR_EDITOR_DESTROYED)) {
              return Err(NS_ERROR_EDITOR_DESTROYED);
            }
            NS_WARNING(
                "HTMLEditor::InsertNodeInToProperAncestorWithTransaction("
                "SplitAtEdges::eDoNotCreateEmptyContainer) failed, but "
                "ignored");
            continue;  // the inner `for` loop
          }
          if (MOZ_UNLIKELY(!moveParentResult.inspect().Handled())) {
            continue;
          }
          insertedContextParentContent = oldParentContent;
          pointToInsert.Set(oldParentContent);
          MOZ_ASSERT(pointToInsert.IsSetAndValidInComposedDoc());
          nsresult rv = moveParentResult.inspect().SuggestCaretPointTo(
              mHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
                            SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
                            SuggestCaret::AndIgnoreTrivialError});
          if (NS_FAILED(rv)) {
            NS_WARNING("CreateContentResult::SuggestCaretPointTo() failed");
            return Err(rv);
          }
          NS_WARNING_ASSERTION(
              rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
              "CreateContentResult::SuggestCaretPointTo() failed, but ignored");
          break;  // from the inner `for` loop
        }         // end of the inner `for` loop
      }
    }
    if (lastInsertedPoint.IsSet()) {
      if (MOZ_UNLIKELY(lastInsertedPoint.GetContainer() !=
                       lastInsertedPoint.GetChild()->GetParentNode())) {
        NS_WARNING(
            "HTMLEditor::InsertHTMLWithContextAsSubAction() got lost insertion "
            "point");
        return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
      }
      pointToInsert = lastInsertedPoint.NextPoint();
      MOZ_ASSERT(pointToInsert.IsSetAndValidInComposedDoc());
    }
  }  // end of the `for` loop

  return lastInsertedPoint;
}

nsresult HTMLEditor::HTMLWithContextInserter::MoveCaretOutsideOfLink(
    Element& aLinkElement, const EditorDOMPoint& aPointToPutCaret) {
  MOZ_ASSERT(HTMLEditUtils::IsLink(&aLinkElement));

  // The reason why do that instead of just moving caret after it is, the
  // link might have ended in an invisible `
` element. If so, the code // above just placed selection inside that. So we need to split it instead. // XXX Sounds like that it's not really expensive comparing with the reason // to use SplitNodeDeepWithTransaction() here. Result splitLinkResult = mHTMLEditor.SplitNodeDeepWithTransaction( aLinkElement, aPointToPutCaret, SplitAtEdges::eDoNotCreateEmptyContainer); if (MOZ_UNLIKELY(splitLinkResult.isErr())) { if (splitLinkResult.inspectErr() == NS_ERROR_EDITOR_DESTROYED) { NS_WARNING("HTMLEditor::SplitNodeDeepWithTransaction() failed"); return NS_ERROR_EDITOR_DESTROYED; } NS_WARNING( "HTMLEditor::SplitNodeDeepWithTransaction() failed, but ignored"); } if (nsIContent* previousContentOfSplitPoint = splitLinkResult.inspect().GetPreviousContent()) { splitLinkResult.inspect().IgnoreCaretPointSuggestion(); nsresult rv = mHTMLEditor.CollapseSelectionTo( EditorRawDOMPoint::After(*previousContentOfSplitPoint)); 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; } nsresult rv = splitLinkResult.inspect().SuggestCaretPointTo( mHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion, SuggestCaret::OnlyIfTransactionsAllowedToDoIt}); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "SplitNodeResult::SuggestCaretPointTo() failed"); return rv; } // static Element* HTMLEditor::GetLinkElement(nsINode* aNode) { if (NS_WARN_IF(!aNode)) { return nullptr; } nsINode* node = aNode; while (node) { if (HTMLEditUtils::IsLink(node)) { return node->AsElement(); } node = node->GetParentNode(); } return nullptr; } // static nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces( nsIContent& aNode, NodesToRemove aNodesToRemove) { if (aNode.TextIsOnlyWhitespace()) { nsCOMPtr parent = aNode.GetParentNode(); // TODO: presumably, if the parent is a `
` element, the node
    // shouldn't be removed.
    if (parent) {
      if (aNodesToRemove == NodesToRemove::eAll ||
          HTMLEditUtils::IsAnyListElement(parent)) {
        ErrorResult error;
        parent->RemoveChild(aNode, error);
        NS_WARNING_ASSERTION(!error.Failed(), "nsINode::RemoveChild() failed");
        return error.StealNSResult();
      }
      return NS_OK;
    }
  }

  if (!aNode.IsHTMLElement(nsGkAtoms::pre)) {
    nsCOMPtr child = aNode.GetLastChild();
    while (child) {
      nsCOMPtr previous = child->GetPreviousSibling();
      nsresult rv = FragmentFromPasteCreator::
          RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces(
              *child, aNodesToRemove);
      if (NS_FAILED(rv)) {
        NS_WARNING(
            "HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::"
            "RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces"
            "() "
            "failed");
        return rv;
      }
      child = std::move(previous);
    }
  }
  return NS_OK;
}

class MOZ_STACK_CLASS HTMLEditor::HTMLTransferablePreparer {
 public:
  HTMLTransferablePreparer(const HTMLEditor& aHTMLEditor,
                           nsITransferable** aTransferable);

  nsresult Run();

 private:
  void AddDataFlavorsInBestOrder(nsITransferable& aTransferable) const;

  const HTMLEditor& mHTMLEditor;
  nsITransferable** mTransferable;
};

HTMLEditor::HTMLTransferablePreparer::HTMLTransferablePreparer(
    const HTMLEditor& aHTMLEditor, nsITransferable** aTransferable)
    : mHTMLEditor{aHTMLEditor}, mTransferable{aTransferable} {
  MOZ_ASSERT(mTransferable);
  MOZ_ASSERT(!*mTransferable);
}

nsresult HTMLEditor::PrepareHTMLTransferable(
    nsITransferable** aTransferable) const {
  HTMLTransferablePreparer htmlTransferablePreparer{*this, aTransferable};
  return htmlTransferablePreparer.Run();
}

nsresult HTMLEditor::HTMLTransferablePreparer::Run() {
  // Create generic Transferable for getting the data
  nsresult rv;
  RefPtr 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;
  }

  // Get the nsITransferable interface for getting the data from the clipboard
  RefPtr destdoc = mHTMLEditor.GetDocument();
  nsILoadContext* loadContext = destdoc ? destdoc->GetLoadContext() : nullptr;
  DebugOnly rvIgnored = transferable->Init(loadContext);
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                       "nsITransferable::Init() failed, but ignored");

  // See `HTMLEditor::InsertFromTransferableAtSelection`.
  AddDataFlavorsInBestOrder(*transferable);

  transferable.forget(mTransferable);

  return NS_OK;
}

void HTMLEditor::HTMLTransferablePreparer::AddDataFlavorsInBestOrder(
    nsITransferable& aTransferable) const {
  // Create the desired DataFlavor for the type of data
  // we want to get out of the transferable
  // This should only happen in html editors, not plaintext
  if (!mHTMLEditor.IsPlaintextMailComposer()) {
    DebugOnly rvIgnored =
        aTransferable.AddDataFlavor(kNativeHTMLMime);
    NS_WARNING_ASSERTION(
        NS_SUCCEEDED(rvIgnored),
        "nsITransferable::AddDataFlavor(kNativeHTMLMime) failed, but ignored");
    rvIgnored = aTransferable.AddDataFlavor(kHTMLMime);
    NS_WARNING_ASSERTION(
        NS_SUCCEEDED(rvIgnored),
        "nsITransferable::AddDataFlavor(kHTMLMime) failed, but ignored");
    rvIgnored = aTransferable.AddDataFlavor(kFileMime);
    NS_WARNING_ASSERTION(
        NS_SUCCEEDED(rvIgnored),
        "nsITransferable::AddDataFlavor(kFileMime) failed, but ignored");

    switch (Preferences::GetInt("clipboard.paste_image_type", 1)) {
      case 0:  // prefer JPEG over PNG over GIF encoding
        rvIgnored = aTransferable.AddDataFlavor(kJPEGImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kJPEGImageMime) "
                             "failed, but ignored");
        rvIgnored = aTransferable.AddDataFlavor(kJPGImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kJPGImageMime) "
                             "failed, but ignored");
        rvIgnored = aTransferable.AddDataFlavor(kPNGImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kPNGImageMime) "
                             "failed, but ignored");
        rvIgnored = aTransferable.AddDataFlavor(kGIFImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kGIFImageMime) "
                             "failed, but ignored");
        break;
      case 1:  // prefer PNG over JPEG over GIF encoding (default)
      default:
        rvIgnored = aTransferable.AddDataFlavor(kPNGImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kPNGImageMime) "
                             "failed, but ignored");
        rvIgnored = aTransferable.AddDataFlavor(kJPEGImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kJPEGImageMime) "
                             "failed, but ignored");
        rvIgnored = aTransferable.AddDataFlavor(kJPGImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kJPGImageMime) "
                             "failed, but ignored");
        rvIgnored = aTransferable.AddDataFlavor(kGIFImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kGIFImageMime) "
                             "failed, but ignored");
        break;
      case 2:  // prefer GIF over JPEG over PNG encoding
        rvIgnored = aTransferable.AddDataFlavor(kGIFImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kGIFImageMime) "
                             "failed, but ignored");
        rvIgnored = aTransferable.AddDataFlavor(kJPEGImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kJPEGImageMime) "
                             "failed, but ignored");
        rvIgnored = aTransferable.AddDataFlavor(kJPGImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kJPGImageMime) "
                             "failed, but ignored");
        rvIgnored = aTransferable.AddDataFlavor(kPNGImageMime);
        NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                             "nsITransferable::AddDataFlavor(kPNGImageMime) "
                             "failed, but ignored");
        break;
    }
  }
  DebugOnly rvIgnored = aTransferable.AddDataFlavor(kTextMime);
  NS_WARNING_ASSERTION(
      NS_SUCCEEDED(rvIgnored),
      "nsITransferable::AddDataFlavor(kTextMime) failed, but ignored");
  rvIgnored = aTransferable.AddDataFlavor(kMozTextInternal);
  NS_WARNING_ASSERTION(
      NS_SUCCEEDED(rvIgnored),
      "nsITransferable::AddDataFlavor(kMozTextInternal) failed, but ignored");
}

bool FindIntegerAfterString(const char* aLeadingString, const nsCString& aCStr,
                            int32_t& foundNumber) {
  // first obtain offsets from cfhtml str
  int32_t numFront = aCStr.Find(aLeadingString);
  if (numFront == -1) {
    return false;
  }
  numFront += strlen(aLeadingString);

  int32_t numBack = aCStr.FindCharInSet(CRLF, numFront);
  if (numBack == -1) {
    return false;
  }

  nsAutoCString numStr(Substring(aCStr, numFront, numBack - numFront));
  nsresult errorCode;
  foundNumber = numStr.ToInteger(&errorCode);
  return true;
}

void RemoveFragComments(nsCString& aStr) {
  // remove the StartFragment/EndFragment comments from the str, if present
  int32_t startCommentIndx = aStr.Find("", startCommentIndx);
    if (startCommentEnd > startCommentIndx) {
      aStr.Cut(startCommentIndx, (startCommentEnd + 3) - startCommentIndx);
    }
  }
  int32_t endCommentIndx = aStr.Find("", endCommentIndx);
    if (endCommentEnd > endCommentIndx) {
      aStr.Cut(endCommentIndx, (endCommentEnd + 3) - endCommentIndx);
    }
  }
}

nsresult HTMLEditor::ParseCFHTML(const nsCString& aCfhtml,
                                 char16_t** aStuffToPaste,
                                 char16_t** aCfcontext) {
  // First obtain offsets from cfhtml str.
  int32_t startHTML, endHTML, startFragment, endFragment;
  if (!FindIntegerAfterString("StartHTML:", aCfhtml, startHTML) ||
      startHTML < -1) {
    return NS_ERROR_FAILURE;
  }
  if (!FindIntegerAfterString("EndHTML:", aCfhtml, endHTML) || endHTML < -1) {
    return NS_ERROR_FAILURE;
  }
  if (!FindIntegerAfterString("StartFragment:", aCfhtml, startFragment) ||
      startFragment < 0) {
    return NS_ERROR_FAILURE;
  }
  if (!FindIntegerAfterString("EndFragment:", aCfhtml, endFragment) ||
      startFragment < 0) {
    return NS_ERROR_FAILURE;
  }

  // The StartHTML and EndHTML markers are allowed to be -1 to include
  // everything.
  //   See Reference: MSDN doc entitled "HTML Clipboard Format"
  //   http://msdn.microsoft.com/en-us/library/aa767917(VS.85).aspx#unknown_854
  if (startHTML == -1) {
    startHTML = aCfhtml.Find("");
    if (startHTML == -1) {
      return NS_OK;
    }
  }
  if (endHTML == -1) {
    const char endFragmentMarker[] = "";
    endHTML = aCfhtml.Find(endFragmentMarker);
    if (endHTML == -1) {
      return NS_OK;
    }
    endHTML += ArrayLength(endFragmentMarker) - 1;
  }

  // create context string
  nsAutoCString contextUTF8(
      Substring(aCfhtml, startHTML, startFragment - startHTML) +
      ""_ns +
      Substring(aCfhtml, endFragment, endHTML - endFragment));

  // validate startFragment
  // make sure it's not in the middle of a HTML tag
  // see bug #228879 for more details
  int32_t curPos = startFragment;
  while (curPos > startHTML) {
    if (aCfhtml[curPos] == '>') {
      // working backwards, the first thing we see is the end of a tag
      // so StartFragment is good, so do nothing.
      break;
    }
    if (aCfhtml[curPos] == '<') {
      // if we are at the start, then we want to see the '<'
      if (curPos != startFragment) {
        // working backwards, the first thing we see is the start of a tag
        // so StartFragment is bad, so we need to update it.
        NS_ERROR(
            "StartFragment byte count in the clipboard looks bad, see bug "
            "#228879");
        startFragment = curPos - 1;
      }
      break;
    }
    curPos--;
  }

  // create fragment string
  nsAutoCString fragmentUTF8(
      Substring(aCfhtml, startFragment, endFragment - startFragment));

  // remove the StartFragment/EndFragment comments from the fragment, if present
  RemoveFragComments(fragmentUTF8);

  // remove the StartFragment/EndFragment comments from the context, if present
  RemoveFragComments(contextUTF8);

  // convert both strings to usc2
  const nsString& fragUcs2Str = NS_ConvertUTF8toUTF16(fragmentUTF8);
  const nsString& cntxtUcs2Str = NS_ConvertUTF8toUTF16(contextUTF8);

  // translate platform linebreaks for fragment
  int32_t oldLengthInChars =
      fragUcs2Str.Length() + 1;  // +1 to include null terminator
  int32_t newLengthInChars = 0;
  *aStuffToPaste = nsLinebreakConverter::ConvertUnicharLineBreaks(
      fragUcs2Str.get(), nsLinebreakConverter::eLinebreakAny,
      nsLinebreakConverter::eLinebreakContent, oldLengthInChars,
      &newLengthInChars);
  if (!*aStuffToPaste) {
    NS_WARNING("nsLinebreakConverter::ConvertUnicharLineBreaks() failed");
    return NS_ERROR_FAILURE;
  }

  // translate platform linebreaks for context
  oldLengthInChars =
      cntxtUcs2Str.Length() + 1;  // +1 to include null terminator
  newLengthInChars = 0;
  *aCfcontext = nsLinebreakConverter::ConvertUnicharLineBreaks(
      cntxtUcs2Str.get(), nsLinebreakConverter::eLinebreakAny,
      nsLinebreakConverter::eLinebreakContent, oldLengthInChars,
      &newLengthInChars);
  // it's ok for context to be empty.  frag might be whole doc and contain all
  // its context.

  // we're done!
  return NS_OK;
}

static nsresult ImgFromData(const nsACString& aType, const nsACString& aData,
                            nsString& aOutput) {
  aOutput.AssignLiteral("\"\"");
  return NS_OK;
}

NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLEditor::BlobReader)

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(HTMLEditor::BlobReader)
  NS_IMPL_CYCLE_COLLECTION_UNLINK(mBlob)
  NS_IMPL_CYCLE_COLLECTION_UNLINK(mHTMLEditor)
  NS_IMPL_CYCLE_COLLECTION_UNLINK(mPointToInsert)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(HTMLEditor::BlobReader)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBlob)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mHTMLEditor)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPointToInsert)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

HTMLEditor::BlobReader::BlobReader(BlobImpl* aBlob, HTMLEditor* aHTMLEditor,
                                   SafeToInsertData aSafeToInsertData,
                                   const EditorDOMPoint& aPointToInsert,
                                   DeleteSelectedContent aDeleteSelectedContent)
    : mBlob(aBlob),
      mHTMLEditor(aHTMLEditor),
      // "beforeinput" event should've been dispatched before we read blob,
      // but anyway, we need to clone dataTransfer for "input" event.
      mDataTransfer(mHTMLEditor->GetInputEventDataTransfer()),
      mPointToInsert(aPointToInsert),
      mEditAction(aHTMLEditor->GetEditAction()),
      mSafeToInsertData(aSafeToInsertData),
      mDeleteSelectedContent(aDeleteSelectedContent),
      mNeedsToDispatchBeforeInputEvent(
          !mHTMLEditor->HasTriedToDispatchBeforeInputEvent()) {
  MOZ_ASSERT(mBlob);
  MOZ_ASSERT(mHTMLEditor);
  MOZ_ASSERT(mHTMLEditor->IsEditActionDataAvailable());
  MOZ_ASSERT(mDataTransfer);

  // Take only offset here since it's our traditional behavior.
  if (mPointToInsert.IsSet()) {
    AutoEditorDOMPointChildInvalidator storeOnlyWithOffset(mPointToInsert);
  }
}

nsresult HTMLEditor::BlobReader::OnResult(const nsACString& aResult) {
  AutoEditActionDataSetter editActionData(*mHTMLEditor, mEditAction);
  editActionData.InitializeDataTransfer(mDataTransfer);
  if (NS_WARN_IF(!editActionData.CanHandle())) {
    return EditorBase::ToGenericNSResult(NS_ERROR_FAILURE);
  }

  if (NS_WARN_IF(mNeedsToDispatchBeforeInputEvent)) {
    nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
    if (NS_FAILED(rv)) {
      NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
                           "MaybeDispatchBeforeInputEvent(), failed");
      return EditorBase::ToGenericNSResult(rv);
    }
  } else {
    editActionData.MarkAsBeforeInputHasBeenDispatched();
  }

  nsString blobType;
  mBlob->GetType(blobType);

  // TODO: This does not work well.
  // * If the data is not an image file, this inserts  element with odd
  //   data URI (bug 1610220).
  // * If the data is valid image file data, an  file is inserted with
  //   data URI, but it's not loaded (bug 1610219).
  NS_ConvertUTF16toUTF8 type(blobType);
  nsAutoString stuffToPaste;
  nsresult rv = ImgFromData(type, aResult, stuffToPaste);
  if (NS_FAILED(rv)) {
    NS_WARNING("ImgFormData() failed");
    return EditorBase::ToGenericNSResult(rv);
  }

  RefPtr htmlEditor = std::move(mHTMLEditor);
  AutoPlaceholderBatch treatAsOneTransaction(
      *htmlEditor, ScrollSelectionIntoView::Yes, __FUNCTION__);
  EditorDOMPoint pointToInsert = std::move(mPointToInsert);
  rv = htmlEditor->InsertHTMLWithContextAsSubAction(
      stuffToPaste, u""_ns, u""_ns, NS_LITERAL_STRING_FROM_CSTRING(kFileMime),
      mSafeToInsertData, pointToInsert, mDeleteSelectedContent,
      InlineStylesAtInsertionPoint::Preserve);
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                       "HTMLEditor::InsertHTMLWithContextAsSubAction("
                       "InlineStylesAtInsertionPoint::Preserve) failed");
  return EditorBase::ToGenericNSResult(rv);
}

nsresult HTMLEditor::BlobReader::OnError(const nsAString& aError) {
  AutoTArray error;
  error.AppendElement(aError);
  nsContentUtils::ReportToConsole(
      nsIScriptError::warningFlag, "Editor"_ns, mHTMLEditor->GetDocument(),
      nsContentUtils::eDOM_PROPERTIES, "EditorFileDropFailed", error);
  return NS_OK;
}

class SlurpBlobEventListener final : public nsIDOMEventListener {
 public:
  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_CYCLE_COLLECTION_CLASS(SlurpBlobEventListener)

  explicit SlurpBlobEventListener(HTMLEditor::BlobReader* aListener)
      : mListener(aListener) {}

  MOZ_CAN_RUN_SCRIPT NS_IMETHOD HandleEvent(Event* aEvent) override;

 private:
  ~SlurpBlobEventListener() = default;

  RefPtr mListener;
};

NS_IMPL_CYCLE_COLLECTION(SlurpBlobEventListener, mListener)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SlurpBlobEventListener)
  NS_INTERFACE_MAP_ENTRY(nsISupports)
  NS_INTERFACE_MAP_ENTRY(nsIDOMEventListener)
NS_INTERFACE_MAP_END

NS_IMPL_CYCLE_COLLECTING_ADDREF(SlurpBlobEventListener)
NS_IMPL_CYCLE_COLLECTING_RELEASE(SlurpBlobEventListener)

NS_IMETHODIMP SlurpBlobEventListener::HandleEvent(Event* aEvent) {
  EventTarget* target = aEvent->GetTarget();
  if (!target || !mListener) {
    return NS_OK;
  }

  RefPtr reader = do_QueryObject(target);
  if (!reader) {
    return NS_OK;
  }

  EventMessage message = aEvent->WidgetEventPtr()->mMessage;

  RefPtr listener(mListener);
  if (message == eLoad) {
    MOZ_ASSERT(reader->DataFormat() == FileReader::FILE_AS_BINARY);

    // The original data has been converted from Latin1 to UTF-16, this just
    // undoes that conversion.
    DebugOnly rvIgnored =
        listener->OnResult(NS_LossyConvertUTF16toASCII(reader->Result()));
    NS_WARNING_ASSERTION(
        NS_SUCCEEDED(rvIgnored),
        "HTMLEditor::BlobReader::OnResult() failed, but ignored");
    return NS_OK;
  }

  if (message == eLoadError) {
    nsAutoString errorMessage;
    reader->GetError()->GetErrorMessage(errorMessage);
    DebugOnly rvIgnored = listener->OnError(errorMessage);
    NS_WARNING_ASSERTION(
        NS_SUCCEEDED(rvIgnored),
        "HTMLEditor::BlobReader::OnError() failed, but ignored");
    return NS_OK;
  }

  return NS_OK;
}

// static
nsresult HTMLEditor::SlurpBlob(Blob* aBlob, nsIGlobalObject* aGlobal,
                               BlobReader* aBlobReader) {
  MOZ_ASSERT(aBlob);
  MOZ_ASSERT(aGlobal);
  MOZ_ASSERT(aBlobReader);

  RefPtr workerRef;
  RefPtr reader = new FileReader(aGlobal, workerRef);

  RefPtr eventListener =
      new SlurpBlobEventListener(aBlobReader);

  nsresult rv = reader->AddEventListener(u"load"_ns, eventListener, false);
  if (NS_FAILED(rv)) {
    NS_WARNING("FileReader::AddEventListener(load) failed");
    return rv;
  }

  rv = reader->AddEventListener(u"error"_ns, eventListener, false);
  if (NS_FAILED(rv)) {
    NS_WARNING("FileReader::AddEventListener(error) failed");
    return rv;
  }

  ErrorResult error;
  reader->ReadAsBinaryString(*aBlob, error);
  NS_WARNING_ASSERTION(!error.Failed(),
                       "FileReader::ReadAsBinaryString() failed");
  return error.StealNSResult();
}

nsresult HTMLEditor::InsertObject(
    const nsACString& aType, nsISupports* aObject,
    SafeToInsertData aSafeToInsertData, const EditorDOMPoint& aPointToInsert,
    DeleteSelectedContent aDeleteSelectedContent) {
  MOZ_ASSERT(IsEditActionDataAvailable());

  // Check to see if we the file is actually an image.
  nsAutoCString type(aType);
  if (type.EqualsLiteral(kFileMime)) {
    if (nsCOMPtr file = do_QueryInterface(aObject)) {
      nsCOMPtr mime = do_GetService("@mozilla.org/mime;1");
      if (NS_WARN_IF(!mime)) {
        return NS_ERROR_FAILURE;
      }

      nsresult rv = mime->GetTypeFromFile(file, type);
      if (NS_FAILED(rv)) {
        NS_WARNING("nsIMIMEService::GetTypeFromFile() failed");
        return rv;
      }
    }
  }

  nsCOMPtr object = aObject;
  if (type.EqualsLiteral(kJPEGImageMime) || type.EqualsLiteral(kJPGImageMime) ||
      type.EqualsLiteral(kPNGImageMime) || type.EqualsLiteral(kGIFImageMime)) {
    if (nsCOMPtr file = do_QueryInterface(object)) {
      object = new FileBlobImpl(file);
      // Fallthrough to BlobImpl code below.
    } else if (RefPtr blob = do_QueryObject(object)) {
      object = blob->Impl();
      // Fallthrough.
    } else if (nsCOMPtr imageStream =
                   do_QueryInterface(object)) {
      nsCString imageData;
      nsresult rv = NS_ConsumeStream(imageStream, UINT32_MAX, imageData);
      if (NS_FAILED(rv)) {
        NS_WARNING("NS_ConsumeStream() failed");
        return rv;
      }

      rv = imageStream->Close();
      if (NS_FAILED(rv)) {
        NS_WARNING("nsIInputStream::Close() failed");
        return rv;
      }

      nsAutoString stuffToPaste;
      rv = ImgFromData(type, imageData, stuffToPaste);
      if (NS_FAILED(rv)) {
        NS_WARNING("ImgFromData() failed");
        return rv;
      }

      AutoPlaceholderBatch treatAsOneTransaction(
          *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
      rv = InsertHTMLWithContextAsSubAction(
          stuffToPaste, u""_ns, u""_ns,
          NS_LITERAL_STRING_FROM_CSTRING(kFileMime), aSafeToInsertData,
          aPointToInsert, aDeleteSelectedContent,
          InlineStylesAtInsertionPoint::Preserve);
      NS_WARNING_ASSERTION(
          NS_SUCCEEDED(rv),
          "HTMLEditor::InsertHTMLWithContextAsSubAction("
          "InlineStylesAtInsertionPoint::Preserve) failed, but ignored");
      return NS_OK;
    } else {
      NS_WARNING("HTMLEditor::InsertObject: Unexpected type for image mime");
      return NS_OK;
    }
  }

  // We always try to insert BlobImpl even without a known image mime.
  nsCOMPtr blob = do_QueryInterface(object);
  if (!blob) {
    return NS_OK;
  }

  RefPtr br = new BlobReader(
      blob, this, aSafeToInsertData, aPointToInsert, aDeleteSelectedContent);

  nsCOMPtr inner = GetInnerWindow();
  nsCOMPtr global = do_QueryInterface(inner);
  if (!global) {
    NS_WARNING("Could not get global");
    return NS_ERROR_FAILURE;
  }

  RefPtr domBlob = Blob::Create(global, blob);
  if (!domBlob) {
    NS_WARNING("Blob::Create() failed");
    return NS_ERROR_FAILURE;
  }

  nsresult rv = SlurpBlob(domBlob, global, br);
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::::SlurpBlob() failed");
  return rv;
}

static bool GetString(nsISupports* aData, nsAString& aText) {
  if (nsCOMPtr str = do_QueryInterface(aData)) {
    DebugOnly rvIgnored = str->GetData(aText);
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                         "nsISupportsString::GetData() failed, but ignored");
    return !aText.IsEmpty();
  }

  return false;
}

static bool GetCString(nsISupports* aData, nsACString& aText) {
  if (nsCOMPtr str = do_QueryInterface(aData)) {
    DebugOnly rvIgnored = str->GetData(aText);
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                         "nsISupportsString::GetData() failed, but ignored");
    return !aText.IsEmpty();
  }

  return false;
}

nsresult HTMLEditor::InsertFromTransferableAtSelection(
    nsITransferable* aTransferable, const nsAString& aContextStr,
    const nsAString& aInfoStr, HavePrivateHTMLFlavor aHavePrivateHTMLFlavor) {
  nsAutoCString bestFlavor;
  nsCOMPtr genericDataObj;

  // See `HTMLTransferablePreparer::AddDataFlavorsInBestOrder`.
  nsresult rv = aTransferable->GetAnyTransferData(
      bestFlavor, getter_AddRefs(genericDataObj));
  NS_WARNING_ASSERTION(
      NS_SUCCEEDED(rv),
      "nsITransferable::GetAnyTransferData() failed, but ignored");
  if (NS_SUCCEEDED(rv)) {
    AutoTransactionsConserveSelection dontChangeMySelection(*this);
    nsAutoString flavor;
    CopyASCIItoUTF16(bestFlavor, flavor);
    const SafeToInsertData safeToInsertData = IsSafeToInsertData(nullptr);

    if (bestFlavor.EqualsLiteral(kFileMime) ||
        bestFlavor.EqualsLiteral(kJPEGImageMime) ||
        bestFlavor.EqualsLiteral(kJPGImageMime) ||
        bestFlavor.EqualsLiteral(kPNGImageMime) ||
        bestFlavor.EqualsLiteral(kGIFImageMime)) {
      nsresult rv = InsertObject(bestFlavor, genericDataObj, safeToInsertData,
                                 EditorDOMPoint(), DeleteSelectedContent::Yes);
      if (NS_FAILED(rv)) {
        NS_WARNING("HTMLEditor::InsertObject() failed");
        return rv;
      }
    } else if (bestFlavor.EqualsLiteral(kNativeHTMLMime)) {
      // note cf_html uses utf8
      nsAutoCString cfhtml;
      if (GetCString(genericDataObj, cfhtml)) {
        // cfselection left emtpy for now.
        nsString cfcontext, cffragment, cfselection;
        nsresult rv = ParseCFHTML(cfhtml, getter_Copies(cffragment),
                                  getter_Copies(cfcontext));
        if (NS_SUCCEEDED(rv) && !cffragment.IsEmpty()) {
          // If we have our private HTML flavor, we will only use the fragment
          // from the CF_HTML. The rest comes from the clipboard.
          if (aHavePrivateHTMLFlavor == HavePrivateHTMLFlavor::Yes) {
            AutoPlaceholderBatch treatAsOneTransaction(
                *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
            rv = InsertHTMLWithContextAsSubAction(
                cffragment, aContextStr, aInfoStr, flavor, safeToInsertData,
                EditorDOMPoint(), DeleteSelectedContent::Yes,
                InlineStylesAtInsertionPoint::Clear);
            if (NS_FAILED(rv)) {
              NS_WARNING(
                  "HTMLEditor::InsertHTMLWithContextAsSubAction("
                  "DeleteSelectedContent::Yes, "
                  "InlineStylesAtInsertionPoint::Clear) failed");
              return rv;
            }
          } else {
            AutoPlaceholderBatch treatAsOneTransaction(
                *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
            rv = InsertHTMLWithContextAsSubAction(
                cffragment, cfcontext, cfselection, flavor, safeToInsertData,
                EditorDOMPoint(), DeleteSelectedContent::Yes,
                InlineStylesAtInsertionPoint::Clear);
            if (NS_FAILED(rv)) {
              NS_WARNING(
                  "HTMLEditor::InsertHTMLWithContextAsSubAction("
                  "DeleteSelectedContent::Yes, "
                  "InlineStylesAtInsertionPoint::Clear) failed");
              return rv;
            }
          }
        } else {
          // In some platforms (like Linux), the clipboard might return data
          // requested for unknown flavors (for example:
          // application/x-moz-nativehtml).  In this case, treat the data
          // to be pasted as mere HTML to get the best chance of pasting it
          // correctly.
          bestFlavor.AssignLiteral(kHTMLMime);
          // Fall through the next case
        }
      }
    }
    if (bestFlavor.EqualsLiteral(kHTMLMime) ||
        bestFlavor.EqualsLiteral(kTextMime) ||
        bestFlavor.EqualsLiteral(kMozTextInternal)) {
      nsAutoString stuffToPaste;
      if (!GetString(genericDataObj, stuffToPaste)) {
        nsAutoCString text;
        if (GetCString(genericDataObj, text)) {
          CopyUTF8toUTF16(text, stuffToPaste);
        }
      }

      if (!stuffToPaste.IsEmpty()) {
        if (bestFlavor.EqualsLiteral(kHTMLMime)) {
          AutoPlaceholderBatch treatAsOneTransaction(
              *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
          nsresult rv = InsertHTMLWithContextAsSubAction(
              stuffToPaste, aContextStr, aInfoStr, flavor, safeToInsertData,
              EditorDOMPoint(), DeleteSelectedContent::Yes,
              InlineStylesAtInsertionPoint::Clear);
          if (NS_FAILED(rv)) {
            NS_WARNING(
                "HTMLEditor::InsertHTMLWithContextAsSubAction("
                "DeleteSelectedContent::Yes, "
                "InlineStylesAtInsertionPoint::Clear) failed");
            return rv;
          }
        } else {
          AutoPlaceholderBatch treatAsOneTransaction(
              *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
          nsresult rv =
              InsertTextAsSubAction(stuffToPaste, SelectionHandling::Delete);
          if (NS_FAILED(rv)) {
            NS_WARNING("EditorBase::InsertTextAsSubAction() failed");
            return rv;
          }
        }
      }
    }
  }

  // Try to scroll the selection into view if the paste succeeded
  DebugOnly rvIgnored = ScrollSelectionFocusIntoView();
  NS_WARNING_ASSERTION(
      NS_SUCCEEDED(rvIgnored),
      "EditorBase::ScrollSelectionFocusIntoView() failed, but ignored");
  return NS_OK;
}

static void GetStringFromDataTransfer(const DataTransfer* aDataTransfer,
                                      const nsAString& aType, uint32_t aIndex,
                                      nsString& aOutputString) {
  nsCOMPtr variant;
  DebugOnly rvIgnored = aDataTransfer->GetDataAtNoSecurityCheck(
      aType, aIndex, getter_AddRefs(variant));
  if (!variant) {
    MOZ_ASSERT(aOutputString.IsEmpty());
    return;
  }
  NS_WARNING_ASSERTION(
      NS_SUCCEEDED(rvIgnored),
      "DataTransfer::GetDataAtNoSecurityCheck() failed, but ignored");
  variant->GetAsAString(aOutputString);
  nsContentUtils::PlatformToDOMLineBreaks(aOutputString);
}

nsresult HTMLEditor::InsertFromDataTransfer(
    const DataTransfer* aDataTransfer, uint32_t aIndex,
    nsIPrincipal* aSourcePrincipal, const EditorDOMPoint& aDroppedAt,
    DeleteSelectedContent aDeleteSelectedContent) {
  MOZ_ASSERT(GetEditAction() == EditAction::eDrop ||
             GetEditAction() == EditAction::ePaste);
  MOZ_ASSERT(mPlaceholderBatch,
             "HTMLEditor::InsertFromDataTransfer() should be called by "
             "HandleDropEvent() or paste action and there should've already "
             "been placeholder transaction");
  MOZ_ASSERT_IF(GetEditAction() == EditAction::eDrop, aDroppedAt.IsSet());

  ErrorResult error;
  RefPtr types = aDataTransfer->MozTypesAt(aIndex, error);
  if (error.Failed()) {
    NS_WARNING("DataTransfer::MozTypesAt() failed");
    return error.StealNSResult();
  }

  const bool hasPrivateHTMLFlavor =
      types->Contains(NS_LITERAL_STRING_FROM_CSTRING(kHTMLContext));

  const bool isPlaintextEditor = IsPlaintextMailComposer();
  const SafeToInsertData safeToInsertData =
      IsSafeToInsertData(aSourcePrincipal);

  uint32_t length = types->Length();
  for (uint32_t i = 0; i < length; i++) {
    nsAutoString type;
    types->Item(i, type);

    if (!isPlaintextEditor) {
      if (type.EqualsLiteral(kFileMime) || type.EqualsLiteral(kJPEGImageMime) ||
          type.EqualsLiteral(kJPGImageMime) ||
          type.EqualsLiteral(kPNGImageMime) ||
          type.EqualsLiteral(kGIFImageMime)) {
        nsCOMPtr variant;
        DebugOnly rvIgnored = aDataTransfer->GetDataAtNoSecurityCheck(
            type, aIndex, getter_AddRefs(variant));
        if (variant) {
          NS_WARNING_ASSERTION(
              NS_SUCCEEDED(rvIgnored),
              "DataTransfer::GetDataAtNoSecurityCheck() failed, but ignored");
          nsCOMPtr object;
          rvIgnored = variant->GetAsISupports(getter_AddRefs(object));
          NS_WARNING_ASSERTION(
              NS_SUCCEEDED(rvIgnored),
              "nsIVariant::GetAsISupports() failed, but ignored");
          nsresult rv = InsertObject(NS_ConvertUTF16toUTF8(type), object,
                                     safeToInsertData, aDroppedAt,
                                     aDeleteSelectedContent);
          NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                               "HTMLEditor::InsertObject() failed");
          return rv;
        }
      } else if (type.EqualsLiteral(kNativeHTMLMime)) {
        // Windows only clipboard parsing.
        nsAutoString text;
        GetStringFromDataTransfer(aDataTransfer, type, aIndex, text);
        NS_ConvertUTF16toUTF8 cfhtml(text);

        nsString cfcontext, cffragment,
            cfselection;  // cfselection left emtpy for now

        nsresult rv = ParseCFHTML(cfhtml, getter_Copies(cffragment),
                                  getter_Copies(cfcontext));
        if (NS_SUCCEEDED(rv) && !cffragment.IsEmpty()) {
          if (hasPrivateHTMLFlavor) {
            // If we have our private HTML flavor, we will only use the fragment
            // from the CF_HTML. The rest comes from the clipboard.
            nsAutoString contextString, infoString;
            GetStringFromDataTransfer(
                aDataTransfer, NS_LITERAL_STRING_FROM_CSTRING(kHTMLContext),
                aIndex, contextString);
            GetStringFromDataTransfer(aDataTransfer,
                                      NS_LITERAL_STRING_FROM_CSTRING(kHTMLInfo),
                                      aIndex, infoString);
            AutoPlaceholderBatch treatAsOneTransaction(
                *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
            nsresult rv = InsertHTMLWithContextAsSubAction(
                cffragment, contextString, infoString, type, safeToInsertData,
                aDroppedAt, aDeleteSelectedContent,
                InlineStylesAtInsertionPoint::Clear);
            NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                                 "HTMLEditor::InsertHTMLWithContextAsSubAction("
                                 "InlineStylesAtInsertionPoint::Clear) failed");
            return rv;
          }
          AutoPlaceholderBatch treatAsOneTransaction(
              *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
          nsresult rv = InsertHTMLWithContextAsSubAction(
              cffragment, cfcontext, cfselection, type, safeToInsertData,
              aDroppedAt, aDeleteSelectedContent,
              InlineStylesAtInsertionPoint::Clear);
          NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                               "HTMLEditor::InsertHTMLWithContextAsSubAction("
                               "InlineStylesAtInsertionPoint::Clear) failed");
          return rv;
        }
      } else if (type.EqualsLiteral(kHTMLMime)) {
        nsAutoString text, contextString, infoString;
        GetStringFromDataTransfer(aDataTransfer, type, aIndex, text);
        GetStringFromDataTransfer(aDataTransfer,
                                  NS_LITERAL_STRING_FROM_CSTRING(kHTMLContext),
                                  aIndex, contextString);
        GetStringFromDataTransfer(aDataTransfer,
                                  NS_LITERAL_STRING_FROM_CSTRING(kHTMLInfo),
                                  aIndex, infoString);
        if (type.EqualsLiteral(kHTMLMime)) {
          AutoPlaceholderBatch treatAsOneTransaction(
              *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
          nsresult rv = InsertHTMLWithContextAsSubAction(
              text, contextString, infoString, type, safeToInsertData,
              aDroppedAt, aDeleteSelectedContent,
              InlineStylesAtInsertionPoint::Clear);
          NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                               "HTMLEditor::InsertHTMLWithContextAsSubAction("
                               "InlineStylesAtInsertionPoint::Clear) failed");
          return rv;
        }
      }
    }

    if (type.EqualsLiteral(kTextMime) || type.EqualsLiteral(kMozTextInternal)) {
      nsAutoString text;
      GetStringFromDataTransfer(aDataTransfer, type, aIndex, text);
      AutoPlaceholderBatch treatAsOneTransaction(
          *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
      nsresult rv = InsertTextAt(text, aDroppedAt, aDeleteSelectedContent);
      NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                           "EditorBase::InsertTextAt() failed");
      return rv;
    }
  }

  return NS_OK;
}

// static
HTMLEditor::HavePrivateHTMLFlavor HTMLEditor::ClipboardHasPrivateHTMLFlavor(
    nsIClipboard* aClipboard) {
  if (NS_WARN_IF(!aClipboard)) {
    return HavePrivateHTMLFlavor::No;
  }

  // check the clipboard for our special kHTMLContext flavor.  If that is there,
  // we know we have our own internal html format on clipboard.
  bool hasPrivateHTMLFlavor = false;
  AutoTArray flavArray = {nsDependentCString(kHTMLContext)};
  nsresult rv = aClipboard->HasDataMatchingFlavors(
      flavArray, nsIClipboard::kGlobalClipboard, &hasPrivateHTMLFlavor);
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                       "nsIClipboard::HasDataMatchingFlavors(nsIClipboard::"
                       "kGlobalClipboard) failed");
  return NS_SUCCEEDED(rv) && hasPrivateHTMLFlavor ? HavePrivateHTMLFlavor::Yes
                                                  : HavePrivateHTMLFlavor::No;
}

nsresult HTMLEditor::HandlePaste(AutoEditActionDataSetter& aEditActionData,
                                 int32_t aClipboardType) {
  aEditActionData.InitializeDataTransferWithClipboard(
      SettingDataTransfer::eWithFormat, aClipboardType);
  nsresult rv = aEditActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
  if (NS_FAILED(rv)) {
    NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
                         "CanHandleAndMaybeDispatchBeforeInputEvent() failed");
    return rv;
  }
  rv = PasteInternal(aClipboardType);
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::PasteInternal() failed");
  return rv;
}

nsresult HTMLEditor::PasteInternal(int32_t aClipboardType) {
  MOZ_ASSERT(IsEditActionDataAvailable());

  // Get Clipboard Service
  nsresult rv = NS_OK;
  nsCOMPtr 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 transferable;
  rv = PrepareHTMLTransferable(getter_AddRefs(transferable));
  if (NS_FAILED(rv)) {
    NS_WARNING("HTMLEditor::PrepareHTMLTransferable() failed");
    return rv;
  }
  if (!transferable) {
    NS_WARNING("HTMLEditor::PrepareHTMLTransferable() returned nullptr");
    return NS_ERROR_FAILURE;
  }
  // Get the Data from the clipboard
  auto* windowContext = GetDocument()->GetWindowContext();
  if (!windowContext) {
    NS_WARNING("No window context");
    return NS_ERROR_FAILURE;
  }
  rv = clipboard->GetData(transferable, aClipboardType, windowContext);
  if (NS_FAILED(rv)) {
    NS_WARNING("nsIClipboard::GetData() failed");
    return rv;
  }

  // XXX Why don't you check this first?
  if (!IsModifiable()) {
    return NS_OK;
  }

  // also get additional html copy hints, if present
  nsAutoString contextStr, infoStr;

  // If we have our internal html flavor on the clipboard, there is special
  // context to use instead of cfhtml context.
  const HavePrivateHTMLFlavor clipboardHasPrivateHTMLFlavor =
      ClipboardHasPrivateHTMLFlavor(clipboard);
  if (clipboardHasPrivateHTMLFlavor == HavePrivateHTMLFlavor::Yes) {
    nsCOMPtr contextTransferable =
        do_CreateInstance("@mozilla.org/widget/transferable;1");
    if (!contextTransferable) {
      NS_WARNING(
          "do_CreateInstance() failed to create nsITransferable instance");
      return NS_ERROR_FAILURE;
    }
    DebugOnly rvIgnored = contextTransferable->Init(nullptr);
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                         "nsITransferable::Init() failed, but ignored");
    contextTransferable->SetIsPrivateData(transferable->GetIsPrivateData());
    rvIgnored = contextTransferable->AddDataFlavor(kHTMLContext);
    NS_WARNING_ASSERTION(
        NS_SUCCEEDED(rvIgnored),
        "nsITransferable::AddDataFlavor(kHTMLContext) failed, but ignored");
    rvIgnored =
        clipboard->GetData(contextTransferable, aClipboardType, windowContext);
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                         "nsIClipboard::GetData() failed, but ignored");
    nsCOMPtr contextDataObj;
    rv = contextTransferable->GetTransferData(kHTMLContext,
                                              getter_AddRefs(contextDataObj));
    if (NS_SUCCEEDED(rv) && contextDataObj) {
      if (nsCOMPtr str = do_QueryInterface(contextDataObj)) {
        DebugOnly rvIgnored = str->GetData(contextStr);
        NS_WARNING_ASSERTION(
            NS_SUCCEEDED(rvIgnored),
            "nsISupportsString::GetData() failed, but ignored");
      }
    }

    nsCOMPtr infoTransferable =
        do_CreateInstance("@mozilla.org/widget/transferable;1");
    if (!infoTransferable) {
      NS_WARNING(
          "do_CreateInstance() failed to create nsITransferable instance");
      return NS_ERROR_FAILURE;
    }
    rvIgnored = infoTransferable->Init(nullptr);
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                         "nsITransferable::Init() failed, but ignored");
    contextTransferable->SetIsPrivateData(transferable->GetIsPrivateData());
    rvIgnored = infoTransferable->AddDataFlavor(kHTMLInfo);
    NS_WARNING_ASSERTION(
        NS_SUCCEEDED(rvIgnored),
        "nsITransferable::AddDataFlavor(kHTMLInfo) failed, but ignored");

    rvIgnored =
        clipboard->GetData(infoTransferable, aClipboardType, windowContext);
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                         "nsIClipboard::GetData() failed, but ignored");
    nsCOMPtr infoDataObj;
    rv = infoTransferable->GetTransferData(kHTMLInfo,
                                           getter_AddRefs(infoDataObj));
    if (NS_SUCCEEDED(rv) && infoDataObj) {
      if (nsCOMPtr str = do_QueryInterface(infoDataObj)) {
        DebugOnly rvIgnored = str->GetData(infoStr);
        NS_WARNING_ASSERTION(
            NS_SUCCEEDED(rvIgnored),
            "nsISupportsString::GetData() failed, but ignored");
      }
    }
  }

  rv = InsertFromTransferableAtSelection(transferable, contextStr, infoStr,
                                         clipboardHasPrivateHTMLFlavor);
  NS_WARNING_ASSERTION(
      NS_SUCCEEDED(rv),
      "HTMLEditor::InsertFromTransferableAtSelection() failed");
  return rv;
}

nsresult HTMLEditor::HandlePasteTransferable(
    AutoEditActionDataSetter& aEditActionData, nsITransferable& aTransferable) {
  // InitializeDataTransfer may fetch input stream in aTransferable, so it
  // may be invalid after calling this.
  aEditActionData.InitializeDataTransfer(&aTransferable);

  nsresult rv = aEditActionData.MaybeDispatchBeforeInputEvent();
  if (NS_FAILED(rv)) {
    NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
                         "MaybeDispatchBeforeInputEvent(), failed");
    return rv;
  }

  RefPtr dataTransfer = GetInputEventDataTransfer();
  if (dataTransfer->HasFile() && dataTransfer->MozItemCount() > 0) {
    // Now aTransferable has moved to DataTransfer. Use DataTransfer.
    AutoPlaceholderBatch treatAsOneTransaction(
        *this, ScrollSelectionIntoView::Yes, __FUNCTION__);

    rv = InsertFromDataTransfer(dataTransfer, 0, nullptr, EditorDOMPoint(),
                                DeleteSelectedContent::Yes);
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                         "HTMLEditor::InsertFromDataTransfer("
                         "DeleteSelectedContent::Yes) failed");
    return rv;
  }

  nsAutoString contextStr, infoStr;
  rv = InsertFromTransferableAtSelection(&aTransferable, contextStr, infoStr,
                                         HavePrivateHTMLFlavor::No);
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                       "HTMLEditor::InsertFromTransferableAtSelection("
                       "HavePrivateHTMLFlavor::No) failed");
  return rv;
}

nsresult HTMLEditor::PasteNoFormattingAsAction(
    int32_t aClipboardType, DispatchPasteEvent aDispatchPasteEvent,
    nsIPrincipal* aPrincipal) {
  if (IsReadonly()) {
    return NS_OK;
  }

  AutoEditActionDataSetter editActionData(*this, EditAction::ePaste,
                                          aPrincipal);
  if (NS_WARN_IF(!editActionData.CanHandle())) {
    return NS_ERROR_NOT_INITIALIZED;
  }
  editActionData.InitializeDataTransferWithClipboard(
      SettingDataTransfer::eWithoutFormat, aClipboardType);

  if (aDispatchPasteEvent == DispatchPasteEvent::Yes) {
    RefPtr focusManager = nsFocusManager::GetFocusManager();
    if (NS_WARN_IF(!focusManager)) {
      return NS_ERROR_UNEXPECTED;
    }
    const RefPtr focusedElement = focusManager->GetFocusedElement();

    Result ret =
        DispatchClipboardEventAndUpdateClipboard(ePasteNoFormatting,
                                                 aClipboardType);
    if (MOZ_UNLIKELY(ret.isErr())) {
      NS_WARNING(
          "EditorBase::DispatchClipboardEventAndUpdateClipboard("
          "ePasteNoFormatting) failed");
      return EditorBase::ToGenericNSResult(ret.unwrapErr());
    }
    switch (ret.inspect()) {
      case ClipboardEventResult::DoDefault:
        break;
      case ClipboardEventResult::DefaultPreventedOfPaste:
      case ClipboardEventResult::IgnoredOrError:
        return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
      case ClipboardEventResult::CopyOrCutHandled:
        MOZ_ASSERT_UNREACHABLE("Invalid result for ePaste");
    }

    // If focus is changed by a "paste" event listener, we should keep handling
    // the "pasting" in new focused editor because Chrome works as so.
    const RefPtr newFocusedElement = focusManager->GetFocusedElement();
    if (MOZ_UNLIKELY(focusedElement != newFocusedElement)) {
      // For the privacy reason, let's top handling it if new focused element is
      // in different document.
      if (focusManager->GetFocusedWindow() != GetWindow()) {
        return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
      }
      RefPtr editorBase =
          nsContentUtils::GetActiveEditor(GetPresContext());
      if (!editorBase || (editorBase->IsHTMLEditor() &&
                          !editorBase->AsHTMLEditor()->IsActiveInDOMWindow())) {
        return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
      }
      if (editorBase != this) {
        if (editorBase->IsHTMLEditor()) {
          nsresult rv =
              MOZ_KnownLive(editorBase->AsHTMLEditor())
                  ->PasteNoFormattingAsAction(
                      aClipboardType, DispatchPasteEvent::No, aPrincipal);
          NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                               "HTMLEditor::PasteNoFormattingAsAction("
                               "DispatchPasteEvent::No) failed");
          return EditorBase::ToGenericNSResult(rv);
        }
        nsresult rv = editorBase->PasteAsAction(
            aClipboardType, DispatchPasteEvent::No, aPrincipal);
        NS_WARNING_ASSERTION(
            NS_SUCCEEDED(rv),
            "EditorBase::PasteAsAction(DispatchPasteEvent::No) failed");
        return EditorBase::ToGenericNSResult(rv);
      }
    }
  }

  // Dispatch "beforeinput" event after "paste" event.  And perhaps, before
  // committing composition because if pasting is canceled, we don't need to
  // commit the active composition.
  nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
  if (NS_FAILED(rv)) {
    NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
                         "MaybeDispatchBeforeInputEvent(), failed");
    return EditorBase::ToGenericNSResult(rv);
  }

  DebugOnly rvIgnored = CommitComposition();
  if (NS_WARN_IF(Destroyed())) {
    return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_DESTROYED);
  }
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                       "EditorBase::CommitComposition() failed, but ignored");

  // Get Clipboard Service
  nsCOMPtr clipboard(
      do_GetService("@mozilla.org/widget/clipboard;1", &rv));
  if (NS_FAILED(rv)) {
    NS_WARNING("Failed to get nsIClipboard service");
    return rv;
  }

  if (!GetDocument()) {
    NS_WARNING("Editor didn't have document, but ignored");
    return NS_OK;
  }
  auto* windowContext = GetDocument()->GetWindowContext();
  if (!windowContext) {
    NS_WARNING("Editor didn't have document window context, but ignored");
    return NS_OK;
  }

  Result, nsresult> maybeTransferable =
      EditorUtils::CreateTransferableForPlainText(*GetDocument());
  if (maybeTransferable.isErr()) {
    NS_WARNING("EditorUtils::CreateTransferableForPlainText() failed");
    return EditorBase::ToGenericNSResult(maybeTransferable.unwrapErr());
  }
  nsCOMPtr transferable(maybeTransferable.unwrap());
  if (!transferable) {
    NS_WARNING(
        "EditorUtils::CreateTransferableForPlainText() returned nullptr, but "
        "ignored");
    return NS_OK;
  }

  if (!IsModifiable()) {
    return NS_OK;
  }

  // Get the Data from the clipboard
  rv = clipboard->GetData(transferable, aClipboardType, windowContext);
  if (NS_FAILED(rv)) {
    NS_WARNING("nsIClipboard::GetData() failed");
    return rv;
  }

  rv = InsertFromTransferableAtSelection(transferable, u""_ns, u""_ns,
                                         HavePrivateHTMLFlavor::No);
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                       "HTMLEditor::InsertFromTransferableAtSelection("
                       "HavePrivateHTMLFlavor::No) failed");
  return EditorBase::ToGenericNSResult(rv);
}

// The following arrays contain the MIME types that we can paste. The arrays
// are used by CanPaste() and CanPasteTransferable() below.

static const char* textEditorFlavors[] = {kTextMime};
static const char* textHtmlEditorFlavors[] = {kTextMime,      kHTMLMime,
                                              kJPEGImageMime, kJPGImageMime,
                                              kPNGImageMime,  kGIFImageMime};

bool HTMLEditor::CanPaste(int32_t aClipboardType) const {
  if (AreClipboardCommandsUnconditionallyEnabled()) {
    return true;
  }

  // can't paste if readonly
  if (!IsModifiable()) {
    return false;
  }

  nsresult rv;
  nsCOMPtr clipboard(
      do_GetService("@mozilla.org/widget/clipboard;1", &rv));
  if (NS_FAILED(rv)) {
    NS_WARNING("Failed to get nsIClipboard service");
    return false;
  }

  // Use the flavors depending on the current editor mask
  if (IsPlaintextMailComposer()) {
    AutoTArray flavors;
    flavors.AppendElements(Span(textEditorFlavors));
    bool haveFlavors;
    nsresult rv = clipboard->HasDataMatchingFlavors(flavors, aClipboardType,
                                                    &haveFlavors);
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                         "nsIClipboard::HasDataMatchingFlavors() failed");
    return NS_SUCCEEDED(rv) && haveFlavors;
  }

  AutoTArray flavors;
  flavors.AppendElements(Span(textHtmlEditorFlavors));
  bool haveFlavors;
  rv = clipboard->HasDataMatchingFlavors(flavors, aClipboardType, &haveFlavors);
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                       "nsIClipboard::HasDataMatchingFlavors() failed");
  return NS_SUCCEEDED(rv) && haveFlavors;
}

bool HTMLEditor::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;
  }

  // Peek in |aTransferable| to see if it contains a supported MIME type.

  // Use the flavors depending on the current editor mask
  const char** flavors;
  size_t length;
  if (IsPlaintextMailComposer()) {
    flavors = textEditorFlavors;
    length = ArrayLength(textEditorFlavors);
  } else {
    flavors = textHtmlEditorFlavors;
    length = ArrayLength(textHtmlEditorFlavors);
  }

  for (size_t i = 0; i < length; i++, flavors++) {
    nsCOMPtr data;
    nsresult rv =
        aTransferable->GetTransferData(*flavors, getter_AddRefs(data));
    if (NS_SUCCEEDED(rv) && data) {
      return true;
    }
  }

  return false;
}

nsresult HTMLEditor::HandlePasteAsQuotation(
    AutoEditActionDataSetter& aEditActionData, int32_t aClipboardType) {
  MOZ_ASSERT(aClipboardType == nsIClipboard::kGlobalClipboard ||
             aClipboardType == nsIClipboard::kSelectionClipboard);
  aEditActionData.InitializeDataTransferWithClipboard(
      SettingDataTransfer::eWithFormat, aClipboardType);
  if (NS_WARN_IF(!aEditActionData.CanHandle())) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  nsresult rv = aEditActionData.MaybeDispatchBeforeInputEvent();
  if (NS_FAILED(rv)) {
    NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
                         "MaybeDispatchBeforeInputEvent(), failed");
    return rv;
  }

  if (IsPlaintextMailComposer()) {
    nsresult rv = PasteAsPlaintextQuotation(aClipboardType);
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                         "HTMLEditor::PasteAsPlaintextQuotation() failed");
    return rv;
  }

  // If it's not in plain text edit mode, paste text into new
  // 
element after removing selection. { // XXX Why don't we test these first? Result result = CanHandleHTMLEditSubAction(); if (MOZ_UNLIKELY(result.isErr())) { NS_WARNING("HTMLEditor::CanHandleHTMLEditSubAction() failed"); return result.unwrapErr(); } if (result.inspect().Canceled()) { return NS_OK; } } UndefineCaretBidiLevel(); AutoPlaceholderBatch treatAsOneTransaction( *this, ScrollSelectionIntoView::Yes, __FUNCTION__); IgnoredErrorResult ignoredError; AutoEditSubActionNotifier startToHandleEditSubAction( *this, EditSubAction::eInsertQuotation, nsIEditor::eNext, ignoredError); if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) { return ignoredError.StealNSResult(); } NS_WARNING_ASSERTION( !ignoredError.Failed(), "HTMLEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored"); rv = EnsureNoPaddingBRElementForEmptyEditor(); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return NS_ERROR_EDITOR_DESTROYED; } NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::EnsureNoPaddingBRElementForEmptyEditor() " "failed, but ignored"); if (NS_SUCCEEDED(rv) && SelectionRef().IsCollapsed()) { nsresult rv = EnsureCaretNotAfterInvisibleBRElement(); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return NS_ERROR_EDITOR_DESTROYED; } NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::EnsureCaretNotAfterInvisibleBRElement() " "failed, but ignored"); if (NS_SUCCEEDED(rv)) { nsresult rv = PrepareInlineStylesForCaret(); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return NS_ERROR_EDITOR_DESTROYED; } NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "HTMLEditor::PrepareInlineStylesForCaret() failed, but ignored"); } } // Remove Selection and create `
` now. // XXX Why don't we insert the `
` into the DOM tree after // pasting the content in clipboard into it? Result, nsresult> blockquoteElementOrError = DeleteSelectionAndCreateElement( *nsGkAtoms::blockquote, // MOZ_CAN_RUN_SCRIPT_BOUNDARY due to bug 1758868 [](HTMLEditor&, Element& aBlockquoteElement, const EditorDOMPoint&) MOZ_CAN_RUN_SCRIPT_BOUNDARY { DebugOnly rvIgnored = aBlockquoteElement.SetAttr( kNameSpaceID_None, nsGkAtoms::type, u"cite"_ns, aBlockquoteElement.IsInComposedDoc()); NS_WARNING_ASSERTION( NS_SUCCEEDED(rvIgnored), nsPrintfCString( "Element::SetAttr(nsGkAtoms::type, \"cite\", %s) " "failed, but ignored", aBlockquoteElement.IsInComposedDoc() ? "true" : "false") .get()); return NS_OK; }); if (MOZ_UNLIKELY(blockquoteElementOrError.isErr()) || NS_WARN_IF(Destroyed())) { NS_WARNING( "HTMLEditor::DeleteSelectionAndCreateElement(nsGkAtoms::blockquote) " "failed"); return Destroyed() ? NS_ERROR_EDITOR_DESTROYED : blockquoteElementOrError.unwrapErr(); } MOZ_ASSERT(blockquoteElementOrError.inspect()); // Collapse Selection in the new `
` element. rv = CollapseSelectionToStartOf( MOZ_KnownLive(*blockquoteElementOrError.inspect())); if (NS_FAILED(rv)) { NS_WARNING("EditorBase::CollapseSelectionToStartOf() failed"); return rv; } rv = PasteInternal(aClipboardType); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::PasteInternal() failed"); return rv; } nsresult HTMLEditor::PasteAsPlaintextQuotation(int32_t aSelectionType) { // Get Clipboard Service nsresult rv; nsCOMPtr clipboard = do_GetService("@mozilla.org/widget/clipboard;1", &rv); if (NS_FAILED(rv)) { NS_WARNING("Failed to get nsIClipboard service"); return rv; } // Create generic Transferable for getting the data nsCOMPtr 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"); return NS_ERROR_FAILURE; } RefPtr destdoc = GetDocument(); auto* windowContext = GetDocument()->GetWindowContext(); if (!windowContext) { NS_WARNING("Editor didn't have document window context"); return NS_ERROR_FAILURE; } nsILoadContext* loadContext = destdoc ? destdoc->GetLoadContext() : nullptr; DebugOnly rvIgnored = transferable->Init(loadContext); NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), "nsITransferable::Init() failed, but ignored"); // We only handle plaintext pastes here rvIgnored = transferable->AddDataFlavor(kTextMime); NS_WARNING_ASSERTION( NS_SUCCEEDED(rvIgnored), "nsITransferable::AddDataFlavor(kTextMime) failed, but ignored"); // Get the Data from the clipboard rvIgnored = clipboard->GetData(transferable, aSelectionType, windowContext); NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), "nsIClipboard::GetData() failed, but ignored"); // Now we ask the transferable for the data // it still owns the data, we just have a pointer to it. // If it can't support a "text" output of the data the call will fail nsCOMPtr genericDataObj; nsAutoCString flavor; rv = transferable->GetAnyTransferData(flavor, getter_AddRefs(genericDataObj)); if (NS_FAILED(rv)) { NS_WARNING("nsITransferable::GetAnyTransferData() failed"); return rv; } if (!flavor.EqualsLiteral(kTextMime)) { return NS_OK; } nsAutoString stuffToPaste; if (!GetString(genericDataObj, stuffToPaste)) { return NS_OK; } AutoPlaceholderBatch treatAsOneTransaction( *this, ScrollSelectionIntoView::Yes, __FUNCTION__); rv = InsertAsPlaintextQuotation(stuffToPaste, true, 0); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::InsertAsPlaintextQuotation() failed"); return rv; } nsresult HTMLEditor::InsertWithQuotationsAsSubAction( const nsAString& aQuotedText) { MOZ_ASSERT(IsEditActionDataAvailable()); { Result result = CanHandleHTMLEditSubAction(); if (MOZ_UNLIKELY(result.isErr())) { NS_WARNING("HTMLEditor::CanHandleHTMLEditSubAction() failed"); return result.unwrapErr(); } if (result.inspect().Canceled()) { return NS_OK; } } UndefineCaretBidiLevel(); // Let the citer quote it for us: nsString quotedStuff; InternetCiter::GetCiteString(aQuotedText, quotedStuff); // It's best to put a blank line after the quoted text so that mails // written without thinking won't be so ugly. if (!aQuotedText.IsEmpty() && (aQuotedText.Last() != HTMLEditUtils::kNewLine)) { quotedStuff.Append(HTMLEditUtils::kNewLine); } IgnoredErrorResult ignoredError; AutoEditSubActionNotifier startToHandleEditSubAction( *this, EditSubAction::eInsertText, nsIEditor::eNext, ignoredError); if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) { return ignoredError.StealNSResult(); } NS_WARNING_ASSERTION( !ignoredError.Failed(), "OnStartToHandleTopLevelEditSubAction() failed, but ignored"); nsresult rv = EnsureNoPaddingBRElementForEmptyEditor(); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return NS_ERROR_EDITOR_DESTROYED; } NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::EnsureNoPaddingBRElementForEmptyEditor() " "failed, but ignored"); if (NS_SUCCEEDED(rv) && SelectionRef().IsCollapsed()) { nsresult rv = EnsureCaretNotAfterInvisibleBRElement(); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return NS_ERROR_EDITOR_DESTROYED; } NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::EnsureCaretNotAfterInvisibleBRElement() " "failed, but ignored"); if (NS_SUCCEEDED(rv)) { nsresult rv = PrepareInlineStylesForCaret(); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return NS_ERROR_EDITOR_DESTROYED; } NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "HTMLEditor::PrepareInlineStylesForCaret() failed, but ignored"); } } rv = InsertTextAsSubAction(quotedStuff, SelectionHandling::Delete); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::InsertTextAsSubAction() failed"); return rv; } NS_IMETHODIMP HTMLEditor::InsertTextWithQuotations( const nsAString& aStringToInsert) { AutoEditActionDataSetter editActionData(*this, EditAction::eInsertText); MOZ_ASSERT(!aStringToInsert.IsVoid()); editActionData.SetData(aStringToInsert); nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent(); if (NS_FAILED(rv)) { NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED, "CanHandleAndMaybeDispatchBeforeInputEvent(), failed"); return EditorBase::ToGenericNSResult(rv); } if (aStringToInsert.IsEmpty()) { return NS_OK; } // The whole operation should be undoable in one transaction: // XXX Why isn't enough to use only AutoPlaceholderBatch here? AutoTransactionBatch bundleAllTransactions(*this, __FUNCTION__); AutoPlaceholderBatch treatAsOneTransaction( *this, ScrollSelectionIntoView::Yes, __FUNCTION__); rv = InsertTextWithQuotationsInternal(aStringToInsert); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::InsertTextWithQuotationsInternal() failed"); return EditorBase::ToGenericNSResult(rv); } nsresult HTMLEditor::InsertTextWithQuotationsInternal( const nsAString& aStringToInsert) { MOZ_ASSERT(!aStringToInsert.IsEmpty()); // We're going to loop over the string, collecting up a "hunk" // that's all the same type (quoted or not), // Whenever the quotedness changes (or we reach the string's end) // we will insert the hunk all at once, quoted or non. static const char16_t cite('>'); bool curHunkIsQuoted = (aStringToInsert.First() == cite); nsAString::const_iterator hunkStart, strEnd; aStringToInsert.BeginReading(hunkStart); aStringToInsert.EndReading(strEnd); // In the loop below, we only look for DOM newlines (\n), // because we don't have a FindChars method that can look // for both \r and \n. \r is illegal in the dom anyway, // but in debug builds, let's take the time to verify that // there aren't any there: #ifdef DEBUG nsAString::const_iterator dbgStart(hunkStart); if (FindCharInReadable(HTMLEditUtils::kCarriageReturn, dbgStart, strEnd)) { NS_ASSERTION( false, "Return characters in DOM! InsertTextWithQuotations may be wrong"); } #endif /* DEBUG */ // Loop over lines: nsresult rv = NS_OK; nsAString::const_iterator lineStart(hunkStart); // We will break from inside when we run out of newlines. for (;;) { // Search for the end of this line (dom newlines, see above): bool found = FindCharInReadable(HTMLEditUtils::kNewLine, lineStart, strEnd); bool quoted = false; if (found) { // if there's another newline, lineStart now points there. // Loop over any consecutive newline chars: nsAString::const_iterator firstNewline(lineStart); while (*lineStart == HTMLEditUtils::kNewLine) { ++lineStart; } quoted = (*lineStart == cite); if (quoted == curHunkIsQuoted) { continue; } // else we're changing state, so we need to insert // from curHunk to lineStart then loop around. // But if the current hunk is quoted, then we want to make sure // that any extra newlines on the end do not get included in // the quoted section: blank lines flaking a quoted section // should be considered unquoted, so that if the user clicks // there and starts typing, the new text will be outside of // the quoted block. if (curHunkIsQuoted) { lineStart = firstNewline; // 'firstNewline' points to the first '\n'. We want to // ensure that this first newline goes into the hunk // since quoted hunks can be displayed as blocks // (and the newline should become invisible in this case). // So the next line needs to start at the next character. lineStart++; } } // If no newline found, lineStart is now strEnd and we can finish up, // inserting from curHunk to lineStart then returning. const nsAString& curHunk = Substring(hunkStart, lineStart); nsCOMPtr dummyNode; if (curHunkIsQuoted) { rv = InsertAsPlaintextQuotation(curHunk, false, getter_AddRefs(dummyNode)); if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) { return NS_ERROR_EDITOR_DESTROYED; } NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::InsertAsPlaintextQuotation() failed, " "but might be ignored"); } else { rv = InsertTextAsSubAction(curHunk, SelectionHandling::Delete); NS_WARNING_ASSERTION( NS_SUCCEEDED(rv), "EditorBase::InsertTextAsSubAction() failed, but might be ignored"); } if (!found) { break; } curHunkIsQuoted = quoted; hunkStart = lineStart; } // XXX This returns the last result of InsertAsPlaintextQuotation() or // InsertTextAsSubAction() in the loop. This must be a bug. return rv; } nsresult HTMLEditor::InsertAsQuotation(const nsAString& aQuotedText, nsINode** aNodeInserted) { if (IsPlaintextMailComposer()) { AutoEditActionDataSetter editActionData(*this, EditAction::eInsertText); MOZ_ASSERT(!aQuotedText.IsVoid()); editActionData.SetData(aQuotedText); nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent(); if (NS_FAILED(rv)) { NS_WARNING_ASSERTION( rv == NS_ERROR_EDITOR_ACTION_CANCELED, "CanHandleAndMaybeDispatchBeforeInputEvent(), failed"); return EditorBase::ToGenericNSResult(rv); } AutoPlaceholderBatch treatAsOneTransaction( *this, ScrollSelectionIntoView::Yes, __FUNCTION__); rv = InsertAsPlaintextQuotation(aQuotedText, true, aNodeInserted); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::InsertAsPlaintextQuotation() failed"); return EditorBase::ToGenericNSResult(rv); } AutoEditActionDataSetter editActionData(*this, EditAction::eInsertBlockquoteElement); nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent(); if (NS_FAILED(rv)) { NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED, "CanHandleAndMaybeDispatchBeforeInputEvent(), failed"); return EditorBase::ToGenericNSResult(rv); } AutoPlaceholderBatch treatAsOneTransaction( *this, ScrollSelectionIntoView::Yes, __FUNCTION__); nsAutoString citation; rv = InsertAsCitedQuotationInternal(aQuotedText, citation, false, aNodeInserted); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::InsertAsCitedQuotationInternal() failed"); return EditorBase::ToGenericNSResult(rv); } // Insert plaintext as a quotation, with cite marks (e.g. "> "). // This differs from its corresponding method in TextEditor // in that here, quoted material is enclosed in a
 tag
// in order to preserve the original line wrapping.
nsresult HTMLEditor::InsertAsPlaintextQuotation(const nsAString& aQuotedText,
                                                bool aAddCites,
                                                nsINode** aNodeInserted) {
  MOZ_ASSERT(IsEditActionDataAvailable());

  if (aNodeInserted) {
    *aNodeInserted = nullptr;
  }

  {
    Result result = CanHandleHTMLEditSubAction();
    if (MOZ_UNLIKELY(result.isErr())) {
      NS_WARNING("HTMLEditor::CanHandleHTMLEditSubAction() failed");
      return result.unwrapErr();
    }
    if (result.inspect().Canceled()) {
      return NS_OK;
    }
  }

  UndefineCaretBidiLevel();

  IgnoredErrorResult ignoredError;
  AutoEditSubActionNotifier startToHandleEditSubAction(
      *this, EditSubAction::eInsertQuotation, nsIEditor::eNext, ignoredError);
  if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
    return ignoredError.StealNSResult();
  }
  NS_WARNING_ASSERTION(
      !ignoredError.Failed(),
      "HTMLEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");

  nsresult rv = EnsureNoPaddingBRElementForEmptyEditor();
  if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
    return NS_ERROR_EDITOR_DESTROYED;
  }
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                       "EditorBase::EnsureNoPaddingBRElementForEmptyEditor() "
                       "failed, but ignored");

  if (NS_SUCCEEDED(rv) && SelectionRef().IsCollapsed()) {
    nsresult rv = EnsureCaretNotAfterInvisibleBRElement();
    if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
      return NS_ERROR_EDITOR_DESTROYED;
    }
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                         "HTMLEditor::EnsureCaretNotAfterInvisibleBRElement() "
                         "failed, but ignored");
    if (NS_SUCCEEDED(rv)) {
      nsresult rv = PrepareInlineStylesForCaret();
      if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
        return NS_ERROR_EDITOR_DESTROYED;
      }
      NS_WARNING_ASSERTION(
          NS_SUCCEEDED(rv),
          "HTMLEditor::PrepareInlineStylesForCaret() failed, but ignored");
    }
  }

  // Wrap the inserted quote in a  so we can distinguish it. If we're
  // inserting into the , we use a  which is displayed as a block
  // and sized to the screen using 98 viewport width units.
  // We could use 100vw, but 98vw avoids a horizontal scroll bar where possible.
  // All this is done to wrap overlong lines to the screen and not to the
  // container element, the width-restricted body.
  Result, nsresult> spanElementOrError =
      DeleteSelectionAndCreateElement(
          *nsGkAtoms::span, [](HTMLEditor&, Element& aSpanElement,
                               const EditorDOMPoint& aPointToInsert) {
            // Add an attribute on the pre node so we'll know it's a quotation.
            DebugOnly rvIgnored = aSpanElement.SetAttr(
                kNameSpaceID_None, nsGkAtoms::mozquote, u"true"_ns,
                aSpanElement.IsInComposedDoc());
            NS_WARNING_ASSERTION(
                NS_SUCCEEDED(rvIgnored),
                nsPrintfCString(
                    "Element::SetAttr(nsGkAtoms::mozquote, \"true\", %s) "
                    "failed",
                    aSpanElement.IsInComposedDoc() ? "true" : "false")
                    .get());
            // Allow wrapping on spans so long lines get wrapped to the screen.
            if (aPointToInsert.IsContainerHTMLElement(nsGkAtoms::body)) {
              DebugOnly rvIgnored = aSpanElement.SetAttr(
                  kNameSpaceID_None, nsGkAtoms::style,
                  nsLiteralString(u"white-space: pre-wrap; display: block; "
                                  u"width: 98vw;"),
                  false);
              NS_WARNING_ASSERTION(
                  NS_SUCCEEDED(rvIgnored),
                  "Element::SetAttr(nsGkAtoms::style, \"pre-wrap, block\", "
                  "false) failed, but ignored");
            } else {
              DebugOnly rvIgnored =
                  aSpanElement.SetAttr(kNameSpaceID_None, nsGkAtoms::style,
                                       u"white-space: pre-wrap;"_ns, false);
              NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                                   "Element::SetAttr(nsGkAtoms::style, "
                                   "\"pre-wrap\", false) failed, but ignored");
            }
            return NS_OK;
          });
  NS_WARNING_ASSERTION(spanElementOrError.isOk(),
                       "HTMLEditor::DeleteSelectionAndCreateElement(nsGkAtoms::"
                       "span) failed, but ignored");

  // If this succeeded, then set selection inside the pre
  // so the inserted text will end up there.
  // If it failed, we don't care what the return value was,
  // but we'll fall through and try to insert the text anyway.
  if (spanElementOrError.isOk()) {
    MOZ_ASSERT(spanElementOrError.inspect());
    rv = CollapseSelectionToStartOf(
        MOZ_KnownLive(*spanElementOrError.inspect()));
    if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
      NS_WARNING(
          "EditorBase::CollapseSelectionToStartOf() caused destroying the "
          "editor");
      return NS_ERROR_EDITOR_DESTROYED;
    }
    NS_WARNING_ASSERTION(
        NS_SUCCEEDED(rv),
        "EditorBase::CollapseSelectionToStartOf() failed, but ignored");
  }

  // TODO: We should insert text at specific point rather than at selection.
  //       Then, we can do this before inserting the  element.
  if (aAddCites) {
    rv = InsertWithQuotationsAsSubAction(aQuotedText);
    if (NS_FAILED(rv)) {
      NS_WARNING("HTMLEditor::InsertWithQuotationsAsSubAction() failed");
      return rv;
    }
  } else {
    rv = InsertTextAsSubAction(aQuotedText, SelectionHandling::Delete);
    if (NS_FAILED(rv)) {
      NS_WARNING("EditorBase::InsertTextAsSubAction() failed");
      return rv;
    }
  }

  // XXX Why don't we check this before inserting the quoted text?
  if (spanElementOrError.isErr()) {
    return NS_OK;
  }

  // Set the selection to just after the inserted node:
  EditorRawDOMPoint afterNewSpanElement(
      EditorRawDOMPoint::After(*spanElementOrError.inspect()));
  NS_WARNING_ASSERTION(
      afterNewSpanElement.IsSet(),
      "Failed to set after the new  element, but ignored");
  if (afterNewSpanElement.IsSet()) {
    nsresult rv = CollapseSelectionTo(afterNewSpanElement);
    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, but ignored");
  }

  // Note that if !aAddCites, aNodeInserted isn't set.
  // That's okay because the routines that use aAddCites
  // don't need to know the inserted node.
  if (aNodeInserted) {
    spanElementOrError.unwrap().forget(aNodeInserted);
  }

  return NS_OK;
}

NS_IMETHODIMP HTMLEditor::Rewrap(bool aRespectNewlines) {
  AutoEditActionDataSetter editActionData(*this, EditAction::eRewrap);
  nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
  if (NS_FAILED(rv)) {
    NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
                         "CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
    return EditorBase::ToGenericNSResult(rv);
  }

  // Rewrap makes no sense if there's no wrap column; default to 72.
  int32_t wrapWidth = WrapWidth();
  if (wrapWidth <= 0) {
    wrapWidth = 72;
  }

  nsAutoString current;
  const bool isCollapsed = SelectionRef().IsCollapsed();
  uint32_t flags = nsIDocumentEncoder::OutputFormatted |
                   nsIDocumentEncoder::OutputLFLineBreak;
  if (!isCollapsed) {
    flags |= nsIDocumentEncoder::OutputSelectionOnly;
  }
  rv = ComputeValueInternal(u"text/plain"_ns, flags, current);
  if (NS_FAILED(rv)) {
    NS_WARNING("EditorBase::ComputeValueInternal(text/plain) failed");
    return EditorBase::ToGenericNSResult(rv);
  }

  if (current.IsEmpty()) {
    return NS_OK;
  }

  nsString wrapped;
  uint32_t firstLineOffset = 0;  // XXX need to reset this if there is a
                                 //     selection
  InternetCiter::Rewrap(current, wrapWidth, firstLineOffset, aRespectNewlines,
                        wrapped);

  if (wrapped.IsEmpty()) {
    return NS_OK;
  }

  if (isCollapsed) {
    DebugOnly rvIgnored = SelectAllInternal();
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
                         "HTMLEditor::SelectAllInternal() failed");
  }

  // The whole operation in InsertTextWithQuotationsInternal() should be
  // undoable in one transaction.
  // XXX Why isn't enough to use only AutoPlaceholderBatch here?
  AutoTransactionBatch bundleAllTransactions(*this, __FUNCTION__);
  AutoPlaceholderBatch treatAsOneTransaction(
      *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
  rv = InsertTextWithQuotationsInternal(wrapped);
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                       "HTMLEditor::InsertTextWithQuotationsInternal() failed");
  return EditorBase::ToGenericNSResult(rv);
}

NS_IMETHODIMP HTMLEditor::InsertAsCitedQuotation(const nsAString& aQuotedText,
                                                 const nsAString& aCitation,
                                                 bool aInsertHTML,
                                                 nsINode** aNodeInserted) {
  // Don't let anyone insert HTML when we're in plaintext mode.
  if (IsPlaintextMailComposer()) {
    NS_ASSERTION(
        !aInsertHTML,
        "InsertAsCitedQuotation: trying to insert html into plaintext editor");

    AutoEditActionDataSetter editActionData(*this, EditAction::eInsertText);
    MOZ_ASSERT(!aQuotedText.IsVoid());
    editActionData.SetData(aQuotedText);
    nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
    if (NS_FAILED(rv)) {
      NS_WARNING_ASSERTION(
          rv == NS_ERROR_EDITOR_ACTION_CANCELED,
          "CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
      return EditorBase::ToGenericNSResult(rv);
    }

    AutoPlaceholderBatch treatAsOneTransaction(
        *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
    rv = InsertAsPlaintextQuotation(aQuotedText, true, aNodeInserted);
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                         "HTMLEditor::InsertAsPlaintextQuotation() failed");
    return EditorBase::ToGenericNSResult(rv);
  }

  AutoEditActionDataSetter editActionData(*this,
                                          EditAction::eInsertBlockquoteElement);
  nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
  if (NS_FAILED(rv)) {
    NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
                         "CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
    return EditorBase::ToGenericNSResult(rv);
  }

  AutoPlaceholderBatch treatAsOneTransaction(
      *this, ScrollSelectionIntoView::Yes, __FUNCTION__);
  rv = InsertAsCitedQuotationInternal(aQuotedText, aCitation, aInsertHTML,
                                      aNodeInserted);
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                       "HTMLEditor::InsertAsCitedQuotationInternal() failed");
  return EditorBase::ToGenericNSResult(rv);
}

nsresult HTMLEditor::InsertAsCitedQuotationInternal(
    const nsAString& aQuotedText, const nsAString& aCitation, bool aInsertHTML,
    nsINode** aNodeInserted) {
  MOZ_ASSERT(IsEditActionDataAvailable());
  MOZ_ASSERT(!IsPlaintextMailComposer());

  {
    Result result = CanHandleHTMLEditSubAction();
    if (MOZ_UNLIKELY(result.isErr())) {
      NS_WARNING("HTMLEditor::CanHandleHTMLEditSubAction() failed");
      return result.unwrapErr();
    }
    if (result.inspect().Canceled()) {
      return NS_OK;
    }
  }

  UndefineCaretBidiLevel();

  IgnoredErrorResult ignoredError;
  AutoEditSubActionNotifier startToHandleEditSubAction(
      *this, EditSubAction::eInsertQuotation, nsIEditor::eNext, ignoredError);
  if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
    return ignoredError.StealNSResult();
  }
  NS_WARNING_ASSERTION(
      !ignoredError.Failed(),
      "HTMLEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");

  nsresult rv = EnsureNoPaddingBRElementForEmptyEditor();
  if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
    return NS_ERROR_EDITOR_DESTROYED;
  }
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                       "EditorBase::EnsureNoPaddingBRElementForEmptyEditor() "
                       "failed, but ignored");

  if (NS_SUCCEEDED(rv) && SelectionRef().IsCollapsed()) {
    nsresult rv = EnsureCaretNotAfterInvisibleBRElement();
    if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
      return NS_ERROR_EDITOR_DESTROYED;
    }
    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
                         "HTMLEditor::EnsureCaretNotAfterInvisibleBRElement() "
                         "failed, but ignored");
    if (NS_SUCCEEDED(rv)) {
      nsresult rv = PrepareInlineStylesForCaret();
      if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
        return NS_ERROR_EDITOR_DESTROYED;
      }
      NS_WARNING_ASSERTION(
          NS_SUCCEEDED(rv),
          "HTMLEditor::PrepareInlineStylesForCaret() failed, but ignored");
    }
  }

  Result, nsresult> blockquoteElementOrError =
      DeleteSelectionAndCreateElement(
          *nsGkAtoms::blockquote,
          // MOZ_CAN_RUN_SCRIPT_BOUNDARY due to bug 1758868
          [&aCitation](HTMLEditor&, Element& aBlockquoteElement,
                       const EditorDOMPoint&) MOZ_CAN_RUN_SCRIPT_BOUNDARY {
            // Try to set type=cite.  Ignore it if this fails.
            DebugOnly rvIgnored = aBlockquoteElement.SetAttr(
                kNameSpaceID_None, nsGkAtoms::type, u"cite"_ns,
                aBlockquoteElement.IsInComposedDoc());
            NS_WARNING_ASSERTION(
                NS_SUCCEEDED(rvIgnored),
                nsPrintfCString(
                    "Element::SetAttr(nsGkAtoms::type, \"cite\", %s) failed, "
                    "but ignored",
                    aBlockquoteElement.IsInComposedDoc() ? "true" : "false")
                    .get());
            if (!aCitation.IsEmpty()) {
              DebugOnly rvIgnored = aBlockquoteElement.SetAttr(
                  kNameSpaceID_None, nsGkAtoms::cite, aCitation,
                  aBlockquoteElement.IsInComposedDoc());
              NS_WARNING_ASSERTION(
                  NS_SUCCEEDED(rvIgnored),
                  nsPrintfCString(
                      "Element::SetAttr(nsGkAtoms::cite, \"...\", %s) failed, "
                      "but ignored",
                      aBlockquoteElement.IsInComposedDoc() ? "true" : "false")
                      .get());
            }
            return NS_OK;
          });
  if (MOZ_UNLIKELY(blockquoteElementOrError.isErr() ||
                   NS_WARN_IF(Destroyed()))) {
    NS_WARNING(
        "HTMLEditor::DeleteSelectionAndCreateElement(nsGkAtoms::blockquote) "
        "failed");
    return Destroyed() ? NS_ERROR_EDITOR_DESTROYED
                       : blockquoteElementOrError.unwrapErr();
  }
  MOZ_ASSERT(blockquoteElementOrError.inspect());

  // Set the selection inside the blockquote so aQuotedText will go there:
  rv = CollapseSelectionTo(
      EditorRawDOMPoint(blockquoteElementOrError.inspect(), 0u));
  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, but ignored");

  // TODO: We should insert text at specific point rather than at selection.
  //       Then, we can do this before inserting the 
element. if (aInsertHTML) { rv = LoadHTML(aQuotedText); if (NS_WARN_IF(Destroyed())) { return NS_ERROR_EDITOR_DESTROYED; } if (NS_FAILED(rv)) { NS_WARNING("HTMLEditor::LoadHTML() failed"); return rv; } } else { rv = InsertTextAsSubAction( aQuotedText, SelectionHandling::Delete); // XXX ignore charset if (NS_WARN_IF(Destroyed())) { return NS_ERROR_EDITOR_DESTROYED; } if (NS_FAILED(rv)) { NS_WARNING("HTMLEditor::LoadHTML() failed"); return rv; } } // Set the selection to just after the inserted node: EditorRawDOMPoint afterNewBlockquoteElement( EditorRawDOMPoint::After(blockquoteElementOrError.inspect())); NS_WARNING_ASSERTION( afterNewBlockquoteElement.IsSet(), "Failed to set after new
element, but ignored"); if (afterNewBlockquoteElement.IsSet()) { nsresult rv = CollapseSelectionTo(afterNewBlockquoteElement); 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, but ignored"); } if (aNodeInserted) { blockquoteElementOrError.unwrap().forget(aNodeInserted); } return NS_OK; } void HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: RemoveHeadChildAndStealBodyChildsChildren(nsINode& aNode) { nsCOMPtr body, head; // find the body and head nodes if any. // look only at immediate children of aNode. for (nsCOMPtr child = aNode.GetFirstChild(); child; child = child->GetNextSibling()) { if (child->IsHTMLElement(nsGkAtoms::body)) { body = child; } else if (child->IsHTMLElement(nsGkAtoms::head)) { head = child; } } if (head) { ErrorResult ignored; aNode.RemoveChild(*head, ignored); } if (body) { nsCOMPtr child = body->GetFirstChild(); while (child) { ErrorResult ignored; aNode.InsertBefore(*child, body, ignored); child = body->GetFirstChild(); } ErrorResult ignored; aNode.RemoveChild(*body, ignored); } } // static void HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: RemoveIncompleteDescendantsFromInsertingFragment(nsINode& aNode) { nsIContent* child = aNode.GetFirstChild(); while (child) { bool isEmptyNodeShouldNotInserted = false; if (HTMLEditUtils::IsAnyListElement(child)) { // Current limitation of HTMLEditor: // Cannot put caret in a list element which does not have list item // element even as a descendant. I.e., HTMLEditor does not support // editing in such empty list element, and does not support to delete // it from outside. Therefore, HTMLWithContextInserter should not // insert empty list element. isEmptyNodeShouldNotInserted = HTMLEditUtils::IsEmptyNode( *child, { // Although we don't check relation between list item element // and parent list element, but it should not be a problem in the // wild because appearing such invalid list element is an edge // case and anyway HTMLEditor supports editing in them. EmptyCheckOption::TreatListItemAsVisible, // A non-editable list item element may make the list element // visible. Although HTMLEditor does not support to edit list // elements which have only non-editable list item elements, but // it should be deleted from outside. Therefore, don't treat // non-editable things as invisible. // TODO: Currently, HTMLEditor does not support deleting such list // element with Backspace. We should fix this issue. }); } // TODO: Perhaps, we should delete
s if they have no
/ // element, or something other elements which must have specific // children but they don't. if (isEmptyNodeShouldNotInserted) { nsIContent* nextChild = child->GetNextSibling(); OwningNonNull removingChild(*child); removingChild->Remove(); child = nextChild; continue; } if (child->HasChildNodes()) { RemoveIncompleteDescendantsFromInsertingFragment(*child); } child = child->GetNextSibling(); } } // static bool HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: IsInsertionCookie(const nsIContent& aContent) { // Is this child the magical cookie? if (const auto* comment = Comment::FromNode(&aContent)) { nsAutoString data; comment->GetData(data); return data.EqualsLiteral(kInsertCookie); } return false; } /** * This function finds the target node that we will be pasting into. aStart is * the context that we're given and aResult will be the target. Initially, * *aResult must be nullptr. * * The target for a paste is found by either finding the node that contains * the magical comment node containing kInsertCookie or, failing that, the * firstChild of the firstChild (until we reach a leaf). */ bool HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: FindTargetNodeOfContextForPastedHTMLAndRemoveInsertionCookie( nsINode& aStart, nsCOMPtr& aResult) { nsIContent* firstChild = aStart.GetFirstChild(); if (!firstChild) { // If the current result is nullptr, then aStart is a leaf, and is the // fallback result. if (!aResult) { aResult = &aStart; } return false; } for (nsCOMPtr child = firstChild; child; child = child->GetNextSibling()) { if (FragmentFromPasteCreator::IsInsertionCookie(*child)) { // Yes it is! Return an error so we bubble out and short-circuit the // search. aResult = &aStart; child->Remove(); return true; } if (FindTargetNodeOfContextForPastedHTMLAndRemoveInsertionCookie(*child, aResult)) { return true; } } return false; } class MOZ_STACK_CLASS HTMLEditor::HTMLWithContextInserter::FragmentParser final { public: FragmentParser(const Document& aDocument, SafeToInsertData aSafeToInsertData); [[nodiscard]] nsresult ParseContext(const nsAString& aContextString, DocumentFragment** aFragment); [[nodiscard]] nsresult ParsePastedHTML(const nsAString& aInputString, nsAtom* aContextLocalNameAtom, DocumentFragment** aFragment); private: static nsresult ParseFragment(const nsAString& aStr, nsAtom* aContextLocalName, const Document* aTargetDoc, dom::DocumentFragment** aFragment, SafeToInsertData aSafeToInsertData); const Document& mDocument; const SafeToInsertData mSafeToInsertData; }; HTMLEditor::HTMLWithContextInserter::FragmentParser::FragmentParser( const Document& aDocument, SafeToInsertData aSafeToInsertData) : mDocument{aDocument}, mSafeToInsertData{aSafeToInsertData} {} nsresult HTMLEditor::HTMLWithContextInserter::FragmentParser::ParseContext( const nsAString& aContextStr, DocumentFragment** aFragment) { return FragmentParser::ParseFragment(aContextStr, nullptr, &mDocument, aFragment, mSafeToInsertData); } nsresult HTMLEditor::HTMLWithContextInserter::FragmentParser::ParsePastedHTML( const nsAString& aInputString, nsAtom* aContextLocalNameAtom, DocumentFragment** aFragment) { return FragmentParser::ParseFragment(aInputString, aContextLocalNameAtom, &mDocument, aFragment, mSafeToInsertData); } nsresult HTMLEditor::HTMLWithContextInserter::CreateDOMFragmentFromPaste( const nsAString& aInputString, const nsAString& aContextStr, const nsAString& aInfoStr, nsCOMPtr* aOutFragNode, nsCOMPtr* aOutStartNode, nsCOMPtr* aOutEndNode, uint32_t* aOutStartOffset, uint32_t* aOutEndOffset, SafeToInsertData aSafeToInsertData) const { if (NS_WARN_IF(!aOutFragNode) || NS_WARN_IF(!aOutStartNode) || NS_WARN_IF(!aOutEndNode) || NS_WARN_IF(!aOutStartOffset) || NS_WARN_IF(!aOutEndOffset)) { return NS_ERROR_INVALID_ARG; } RefPtr document = mHTMLEditor.GetDocument(); if (NS_WARN_IF(!document)) { return NS_ERROR_FAILURE; } FragmentFromPasteCreator fragmentFromPasteCreator; const nsresult rv = fragmentFromPasteCreator.Run( *document, aInputString, aContextStr, aInfoStr, aOutFragNode, aOutStartNode, aOutEndNode, aSafeToInsertData); *aOutStartOffset = 0; *aOutEndOffset = (*aOutEndNode)->Length(); return rv; } // static nsAtom* HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: DetermineContextLocalNameForParsingPastedHTML( const nsIContent* aParentContentOfPastedHTMLInContext) { if (!aParentContentOfPastedHTMLInContext) { return nsGkAtoms::body; } nsAtom* contextLocalNameAtom = aParentContentOfPastedHTMLInContext->NodeInfo()->NameAtom(); return (aParentContentOfPastedHTMLInContext->IsHTMLElement(nsGkAtoms::html)) ? nsGkAtoms::body : contextLocalNameAtom; } // static nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: MergeAndPostProcessFragmentsForPastedHTMLAndContext( DocumentFragment& aDocumentFragmentForPastedHTML, DocumentFragment& aDocumentFragmentForContext, nsIContent& aTargetContentOfContextForPastedHTML) { FragmentFromPasteCreator::RemoveHeadChildAndStealBodyChildsChildren( aDocumentFragmentForPastedHTML); FragmentFromPasteCreator::RemoveIncompleteDescendantsFromInsertingFragment( aDocumentFragmentForPastedHTML); // unite the two trees IgnoredErrorResult ignoredError; aTargetContentOfContextForPastedHTML.AppendChild( aDocumentFragmentForPastedHTML, ignoredError); NS_WARNING_ASSERTION(!ignoredError.Failed(), "nsINode::AppendChild() failed, but ignored"); const nsresult rv = FragmentFromPasteCreator:: RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces( aDocumentFragmentForContext, NodesToRemove::eOnlyListItems); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::" "RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces()" " failed"); return rv; } return rv; } // static nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: PostProcessFragmentForPastedHTMLWithoutContext( DocumentFragment& aDocumentFragmentForPastedHTML) { FragmentFromPasteCreator::RemoveHeadChildAndStealBodyChildsChildren( aDocumentFragmentForPastedHTML); FragmentFromPasteCreator::RemoveIncompleteDescendantsFromInsertingFragment( aDocumentFragmentForPastedHTML); const nsresult rv = FragmentFromPasteCreator:: RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces( aDocumentFragmentForPastedHTML, NodesToRemove::eOnlyListItems); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::" "RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces() " "failed"); return rv; } return rv; } // static nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: PreProcessContextDocumentFragmentForMerging( DocumentFragment& aDocumentFragmentForContext) { // The context is expected to contain text nodes only in block level // elements. Hence, if they contain only whitespace, they're invisible. const nsresult rv = FragmentFromPasteCreator:: RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces( aDocumentFragmentForContext, NodesToRemove::eAll); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::" "RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces() " "failed"); return rv; } FragmentFromPasteCreator::RemoveHeadChildAndStealBodyChildsChildren( aDocumentFragmentForContext); return rv; } nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: CreateDocumentFragmentAndGetParentOfPastedHTMLInContext( const Document& aDocument, const nsAString& aInputString, const nsAString& aContextStr, SafeToInsertData aSafeToInsertData, nsCOMPtr& aParentNodeOfPastedHTMLInContext, RefPtr& aDocumentFragmentToInsert) const { // if we have context info, create a fragment for that RefPtr documentFragmentForContext; FragmentParser fragmentParser{aDocument, aSafeToInsertData}; if (!aContextStr.IsEmpty()) { nsresult rv = fragmentParser.ParseContext( aContextStr, getter_AddRefs(documentFragmentForContext)); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentParser::ParseContext() " "failed"); return rv; } if (!documentFragmentForContext) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentParser::ParseContext() " "returned nullptr"); return NS_ERROR_FAILURE; } rv = FragmentFromPasteCreator::PreProcessContextDocumentFragmentForMerging( *documentFragmentForContext); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::" "PreProcessContextDocumentFragmentForMerging() failed."); return rv; } FragmentFromPasteCreator:: FindTargetNodeOfContextForPastedHTMLAndRemoveInsertionCookie( *documentFragmentForContext, aParentNodeOfPastedHTMLInContext); MOZ_ASSERT(aParentNodeOfPastedHTMLInContext); } nsCOMPtr parentContentOfPastedHTMLInContext = nsIContent::FromNodeOrNull(aParentNodeOfPastedHTMLInContext); MOZ_ASSERT_IF(aParentNodeOfPastedHTMLInContext, parentContentOfPastedHTMLInContext); nsAtom* contextLocalNameAtom = FragmentFromPasteCreator::DetermineContextLocalNameForParsingPastedHTML( parentContentOfPastedHTMLInContext); RefPtr documentFragmentForPastedHTML; nsresult rv = fragmentParser.ParsePastedHTML( aInputString, contextLocalNameAtom, getter_AddRefs(documentFragmentForPastedHTML)); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentParser::ParsePastedHTML()" " failed"); return rv; } if (!documentFragmentForPastedHTML) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentParser::ParsePastedHTML()" " returned nullptr"); return NS_ERROR_FAILURE; } if (aParentNodeOfPastedHTMLInContext) { const nsresult rv = FragmentFromPasteCreator:: MergeAndPostProcessFragmentsForPastedHTMLAndContext( *documentFragmentForPastedHTML, *documentFragmentForContext, *parentContentOfPastedHTMLInContext); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::" "MergeAndPostProcessFragmentsForPastedHTMLAndContext() failed."); return rv; } aDocumentFragmentToInsert = std::move(documentFragmentForContext); } else { const nsresult rv = PostProcessFragmentForPastedHTMLWithoutContext( *documentFragmentForPastedHTML); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::" "PostProcessFragmentForPastedHTMLWithoutContext() failed."); return rv; } aDocumentFragmentToInsert = std::move(documentFragmentForPastedHTML); } return rv; } nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::Run( const Document& aDocument, const nsAString& aInputString, const nsAString& aContextStr, const nsAString& aInfoStr, nsCOMPtr* aOutFragNode, nsCOMPtr* aOutStartNode, nsCOMPtr* aOutEndNode, SafeToInsertData aSafeToInsertData) const { MOZ_ASSERT(aOutFragNode); MOZ_ASSERT(aOutStartNode); MOZ_ASSERT(aOutEndNode); nsCOMPtr parentNodeOfPastedHTMLInContext; RefPtr documentFragmentToInsert; nsresult rv = CreateDocumentFragmentAndGetParentOfPastedHTMLInContext( aDocument, aInputString, aContextStr, aSafeToInsertData, parentNodeOfPastedHTMLInContext, documentFragmentToInsert); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::" "CreateDocumentFragmentAndGetParentOfPastedHTMLInContext() failed."); return rv; } // If there was no context, then treat all of the data we did get as the // pasted data. if (parentNodeOfPastedHTMLInContext) { *aOutEndNode = *aOutStartNode = parentNodeOfPastedHTMLInContext; } else { *aOutEndNode = *aOutStartNode = documentFragmentToInsert; } *aOutFragNode = std::move(documentFragmentToInsert); if (!aInfoStr.IsEmpty()) { const nsresult rv = FragmentFromPasteCreator::MoveStartAndEndAccordingToHTMLInfo( aInfoStr, aOutStartNode, aOutEndNode); if (NS_FAILED(rv)) { NS_WARNING( "HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::" "MoveStartAndEndAccordingToHTMLInfo() failed"); return rv; } } return NS_OK; } // static nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator:: MoveStartAndEndAccordingToHTMLInfo(const nsAString& aInfoStr, nsCOMPtr* aOutStartNode, nsCOMPtr* aOutEndNode) { int32_t sep = aInfoStr.FindChar((char16_t)','); nsAutoString numstr1(Substring(aInfoStr, 0, sep)); nsAutoString numstr2( Substring(aInfoStr, sep + 1, aInfoStr.Length() - (sep + 1))); // Move the start and end children. nsresult rvIgnored; int32_t num = numstr1.ToInteger(&rvIgnored); NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), "nsAString::ToInteger() failed, but ignored"); while (num--) { nsINode* tmp = (*aOutStartNode)->GetFirstChild(); if (!tmp) { NS_WARNING("aOutStartNode did not have children"); return NS_ERROR_FAILURE; } *aOutStartNode = tmp; } num = numstr2.ToInteger(&rvIgnored); while (num--) { nsINode* tmp = (*aOutEndNode)->GetLastChild(); if (!tmp) { NS_WARNING("aOutEndNode did not have children"); return NS_ERROR_FAILURE; } *aOutEndNode = tmp; } return NS_OK; } // static nsresult HTMLEditor::HTMLWithContextInserter::FragmentParser::ParseFragment( const nsAString& aFragStr, nsAtom* aContextLocalName, const Document* aTargetDocument, DocumentFragment** aFragment, SafeToInsertData aSafeToInsertData) { nsAutoScriptBlockerSuppressNodeRemoved autoBlocker; nsCOMPtr doc = nsContentUtils::CreateInertHTMLDocument(aTargetDocument); if (!doc) { return NS_ERROR_FAILURE; } RefPtr fragment = new (doc->NodeInfoManager()) DocumentFragment(doc->NodeInfoManager()); nsresult rv = nsContentUtils::ParseFragmentHTML( aFragStr, fragment, aContextLocalName ? aContextLocalName : nsGkAtoms::body, kNameSpaceID_XHTML, false, true); NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "nsContentUtils::ParseFragmentHTML() failed"); if (aSafeToInsertData == SafeToInsertData::No) { nsTreeSanitizer sanitizer(aContextLocalName ? nsIParserUtils::SanitizerAllowStyle : nsIParserUtils::SanitizerAllowComments); sanitizer.Sanitize(fragment); } fragment.forget(aFragment); return rv; } // static void HTMLEditor::HTMLWithContextInserter:: CollectTopMostChildContentsCompletelyInRange( const EditorRawDOMPoint& aStartPoint, const EditorRawDOMPoint& aEndPoint, nsTArray>& aOutArrayOfContents) { MOZ_ASSERT(aStartPoint.IsSetAndValid()); MOZ_ASSERT(aEndPoint.IsSetAndValid()); RefPtr range = nsRange::Create(aStartPoint.ToRawRangeBoundary(), aEndPoint.ToRawRangeBoundary(), IgnoreErrors()); if (!range) { NS_WARNING("nsRange::Create() failed"); return; } DOMSubtreeIterator iter; if (NS_FAILED(iter.Init(*range))) { NS_WARNING("DOMSubtreeIterator::Init() failed, but ignored"); return; } iter.AppendAllNodesToArray(aOutArrayOfContents); } /****************************************************************************** * HTMLEditor::AutoHTMLFragmentBoundariesFixer ******************************************************************************/ HTMLEditor::AutoHTMLFragmentBoundariesFixer::AutoHTMLFragmentBoundariesFixer( nsTArray>& aArrayOfTopMostChildContents) { EnsureBeginsOrEndsWithValidContent(StartOrEnd::start, aArrayOfTopMostChildContents); EnsureBeginsOrEndsWithValidContent(StartOrEnd::end, aArrayOfTopMostChildContents); } // static void HTMLEditor::AutoHTMLFragmentBoundariesFixer:: CollectTableAndAnyListElementsOfInclusiveAncestorsAt( nsIContent& aContent, nsTArray>& aOutArrayOfListAndTableElements) { for (Element* element = aContent.GetAsElementOrParentElement(); element; element = element->GetParentElement()) { if (HTMLEditUtils::IsAnyListElement(element) || HTMLEditUtils::IsTable(element)) { aOutArrayOfListAndTableElements.AppendElement(*element); } } } // static Element* HTMLEditor::AutoHTMLFragmentBoundariesFixer:: GetMostDistantAncestorListOrTableElement( const nsTArray>& aArrayOfTopMostChildContents, const nsTArray>& aInclusiveAncestorsTableOrListElements) { Element* lastFoundAncestorListOrTableElement = nullptr; for (auto& content : aArrayOfTopMostChildContents) { if (HTMLEditUtils::IsAnyTableElementButNotTable(content)) { Element* tableElement = HTMLEditUtils::GetClosestAncestorTableElement(*content); if (!tableElement) { continue; } // If we find a `` element which is an ancestor of a table // related element and is not an acestor of first nor last of // aArrayOfNodes, return the last found list or `
` element. // XXX Is that really expected that this returns a list element in this // case? if (!aInclusiveAncestorsTableOrListElements.Contains(tableElement)) { return lastFoundAncestorListOrTableElement; } // If we find a `
` element which is topmost list or `
` // element at first or last of aArrayOfNodes, return it. if (aInclusiveAncestorsTableOrListElements.LastElement().get() == tableElement) { return tableElement; } // Otherwise, store the `
` element which is an ancestor but // not topmost ancestor of first or last of aArrayOfNodes. lastFoundAncestorListOrTableElement = tableElement; continue; } if (!HTMLEditUtils::IsListItem(content)) { continue; } Element* listElement = HTMLEditUtils::GetClosestAncestorAnyListElement(*content); if (!listElement) { continue; } // If we find a list element which is ancestor of a list item element and // is not an acestor of first nor last of aArrayOfNodes, return the last // found list or `
` element. // XXX Is that really expected that this returns a `
` element in // this case? if (!aInclusiveAncestorsTableOrListElements.Contains(listElement)) { return lastFoundAncestorListOrTableElement; } // If we find a list element which is topmost list or `
` element at // first or last of aArrayOfNodes, return it. if (aInclusiveAncestorsTableOrListElements.LastElement().get() == listElement) { return listElement; } // Otherwise, store the list element which is an ancestor but not topmost // ancestor of first or last of aArrayOfNodes. lastFoundAncestorListOrTableElement = listElement; } // If we find only non-topmost list or `
` element, returns the last // found one (meaning bottommost one). Otherwise, nullptr. return lastFoundAncestorListOrTableElement; } Element* HTMLEditor::AutoHTMLFragmentBoundariesFixer::FindReplaceableTableElement( Element& aTableElement, nsIContent& aContentMaybeInTableElement) const { MOZ_ASSERT(aTableElement.IsHTMLElement(nsGkAtoms::table)); // Perhaps, this is designed for climbing up the DOM tree from // aContentMaybeInTableElement to aTableElement and making sure that // aContentMaybeInTableElement itself or its ancestor is a ``, ``, ``, `` or `
`, ``, // `
`. // But this looks really buggy because this loop may skip aTableElement // as the following NS_ASSERTION. We should write automated tests and // check right behavior. for (Element* element = aContentMaybeInTableElement.GetAsElementOrParentElement(); element; element = element->GetParentElement()) { if (!HTMLEditUtils::IsAnyTableElement(element) || element->IsHTMLElement(nsGkAtoms::table)) { // XXX Perhaps, the original developer of this method assumed that // aTableElement won't be skipped because if it's assumed, we can // stop climbing up the tree in that case. NS_ASSERTION(element != &aTableElement, "The table element which is looking for is ignored"); continue; } Element* tableElement = nullptr; for (Element* maybeTableElement = element->GetParentElement(); maybeTableElement; maybeTableElement = maybeTableElement->GetParentElement()) { if (maybeTableElement->IsHTMLElement(nsGkAtoms::table)) { tableElement = maybeTableElement; break; } } if (tableElement == &aTableElement) { return element; } // XXX If we find another `` element, why don't we keep searching // from its parent? } return nullptr; } bool HTMLEditor::AutoHTMLFragmentBoundariesFixer::IsReplaceableListElement( Element& aListElement, nsIContent& aContentMaybeInListElement) const { MOZ_ASSERT(HTMLEditUtils::IsAnyListElement(&aListElement)); // Perhaps, this is designed for climbing up the DOM tree from // aContentMaybeInListElement to aListElement and making sure that // aContentMaybeInListElement itself or its ancestor is an list item. // But this looks really buggy because this loop may skip aListElement // as the following NS_ASSERTION. We should write automated tests and // check right behavior. for (Element* element = aContentMaybeInListElement.GetAsElementOrParentElement(); element; element = element->GetParentElement()) { if (!HTMLEditUtils::IsListItem(element)) { // XXX Perhaps, the original developer of this method assumed that // aListElement won't be skipped because if it's assumed, we can // stop climbing up the tree in that case. NS_ASSERTION(element != &aListElement, "The list element which is looking for is ignored"); continue; } Element* listElement = HTMLEditUtils::GetClosestAncestorAnyListElement(*element); if (listElement == &aListElement) { return true; } // XXX If we find another list element, why don't we keep searching // from its parent? } return false; } void HTMLEditor::AutoHTMLFragmentBoundariesFixer:: EnsureBeginsOrEndsWithValidContent(StartOrEnd aStartOrEnd, nsTArray>& aArrayOfTopMostChildContents) const { MOZ_ASSERT(!aArrayOfTopMostChildContents.IsEmpty()); // Collect list elements and table related elements at first or last node // in aArrayOfTopMostChildContents. AutoTArray, 4> inclusiveAncestorsListOrTableElements; CollectTableAndAnyListElementsOfInclusiveAncestorsAt( aStartOrEnd == StartOrEnd::end ? aArrayOfTopMostChildContents.LastElement() : aArrayOfTopMostChildContents[0], inclusiveAncestorsListOrTableElements); if (inclusiveAncestorsListOrTableElements.IsEmpty()) { return; } // Get most ancestor list or `
` element in // inclusiveAncestorsListOrTableElements which contains earlier // node in aArrayOfTopMostChildContents as far as possible. // XXX With inclusiveAncestorsListOrTableElements, this returns a // list or `
` element which contains first or last node of // aArrayOfTopMostChildContents. However, this seems slow when // aStartOrEnd is StartOrEnd::end and only the last node is in // different list or `
`. But I'm not sure whether it's // possible case or not. We need to add tests to // test_content_iterator_subtree.html for checking how // SubtreeContentIterator works. Element* listOrTableElement = GetMostDistantAncestorListOrTableElement( aArrayOfTopMostChildContents, inclusiveAncestorsListOrTableElements); if (!listOrTableElement) { return; } // If we have pieces of tables or lists to be inserted, let's force the // insertion to deal with table elements right away, so that it doesn't // orphan some table or list contents outside the table or list. OwningNonNull& firstOrLastChildContent = aStartOrEnd == StartOrEnd::end ? aArrayOfTopMostChildContents.LastElement() : aArrayOfTopMostChildContents[0]; // Find substructure of list or table that must be included in paste. Element* replaceElement; if (HTMLEditUtils::IsAnyListElement(listOrTableElement)) { if (!IsReplaceableListElement(*listOrTableElement, firstOrLastChildContent)) { return; } replaceElement = listOrTableElement; } else { MOZ_ASSERT(listOrTableElement->IsHTMLElement(nsGkAtoms::table)); replaceElement = FindReplaceableTableElement(*listOrTableElement, firstOrLastChildContent); if (!replaceElement) { return; } } // If we can replace the given list element or found a table related element // in the `
` element, insert it into aArrayOfTopMostChildContents which // is tompost children to be inserted instead of descendants of them in // aArrayOfTopMostChildContents. for (size_t i = 0; i < aArrayOfTopMostChildContents.Length();) { OwningNonNull& content = aArrayOfTopMostChildContents[i]; if (content == replaceElement) { // If the element is n aArrayOfTopMostChildContents, its descendants must // not be in the array. Therefore, we don't need to optimize this case. // XXX Perhaps, we can break this loop right now. aArrayOfTopMostChildContents.RemoveElementAt(i); continue; } if (!EditorUtils::IsDescendantOf(content, *replaceElement)) { i++; continue; } // For saving number of calls of EditorUtils::IsDescendantOf(), we should // remove its siblings in the array. nsIContent* parent = content->GetParent(); aArrayOfTopMostChildContents.RemoveElementAt(i); while (i < aArrayOfTopMostChildContents.Length() && aArrayOfTopMostChildContents[i]->GetParent() == parent) { aArrayOfTopMostChildContents.RemoveElementAt(i); } } // Now replace the removed nodes with the structural parent if (aStartOrEnd == StartOrEnd::end) { aArrayOfTopMostChildContents.AppendElement(*replaceElement); } else { aArrayOfTopMostChildContents.InsertElementAt(0, *replaceElement); } } } // namespace mozilla