| /* |
| * Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "CompositeEditCommand.h" |
| |
| #include "AXObjectCache.h" |
| #include "AppendNodeCommand.h" |
| #include "ApplyStyleCommand.h" |
| #include "BreakBlockquoteCommand.h" |
| #include "DataTransfer.h" |
| #include "DeleteFromTextNodeCommand.h" |
| #include "DeleteSelectionCommand.h" |
| #include "Document.h" |
| #include "DocumentFragment.h" |
| #include "DocumentMarkerController.h" |
| #include "Editing.h" |
| #include "Editor.h" |
| #include "EditorInsertAction.h" |
| #include "ElementTraversal.h" |
| #include "Event.h" |
| #include "Frame.h" |
| #include "HTMLBRElement.h" |
| #include "HTMLDivElement.h" |
| #include "HTMLLIElement.h" |
| #include "HTMLNames.h" |
| #include "HTMLSpanElement.h" |
| #include "InlineTextBox.h" |
| #include "InsertIntoTextNodeCommand.h" |
| #include "InsertLineBreakCommand.h" |
| #include "InsertNodeBeforeCommand.h" |
| #include "InsertParagraphSeparatorCommand.h" |
| #include "InsertTextCommand.h" |
| #include "MergeIdenticalElementsCommand.h" |
| #include "NodeTraversal.h" |
| #include "Range.h" |
| #include "RemoveNodeCommand.h" |
| #include "RemoveNodePreservingChildrenCommand.h" |
| #include "RenderBlockFlow.h" |
| #include "RenderText.h" |
| #include "RenderedDocumentMarker.h" |
| #include "ReplaceNodeWithSpanCommand.h" |
| #include "ReplaceSelectionCommand.h" |
| #include "ScopedEventQueue.h" |
| #include "SetNodeAttributeCommand.h" |
| #include "SplitElementCommand.h" |
| #include "SplitTextNodeCommand.h" |
| #include "SplitTextNodeContainingElementCommand.h" |
| #include "StaticRange.h" |
| #include "Text.h" |
| #include "TextIterator.h" |
| #include "VisibleUnits.h" |
| #include "WrapContentsInDummySpanCommand.h" |
| #include "markup.h" |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| int AccessibilityUndoReplacedText::indexForVisiblePosition(const VisiblePosition& position, RefPtr<ContainerNode>& scope) const |
| { |
| if (position.deepEquivalent().isNull()) |
| return -1; |
| return WebCore::indexForVisiblePosition(position, scope); |
| } |
| |
| void AccessibilityUndoReplacedText::configureRangeDeletedByReapplyWithEndingSelection(const VisibleSelection& selection) |
| { |
| if (!AXObjectCache::accessibilityEnabled()) |
| return; |
| if (selection.isNone()) |
| return; |
| m_rangeDeletedByReapply.endIndex.value = indexForVisiblePosition(selection.end(), m_rangeDeletedByReapply.endIndex.scope); |
| } |
| |
| void AccessibilityUndoReplacedText::configureRangeDeletedByReapplyWithStartingSelection(const VisibleSelection& selection) |
| { |
| if (!AXObjectCache::accessibilityEnabled()) |
| return; |
| if (selection.isNone()) |
| return; |
| if (m_rangeDeletedByReapply.startIndex.value == -1) |
| m_rangeDeletedByReapply.startIndex.value = indexForVisiblePosition(selection.start(), m_rangeDeletedByReapply.startIndex.scope); |
| } |
| |
| void AccessibilityUndoReplacedText::setRangeDeletedByUnapply(const VisiblePositionIndexRange& range) |
| { |
| if (m_rangeDeletedByUnapply.isNull()) |
| m_rangeDeletedByUnapply = range; |
| } |
| |
| void AccessibilityUndoReplacedText::captureTextForUnapply() |
| { |
| if (!AXObjectCache::accessibilityEnabled()) |
| return; |
| m_replacedText = textDeletedByReapply(); |
| } |
| |
| void AccessibilityUndoReplacedText::captureTextForReapply() |
| { |
| if (!AXObjectCache::accessibilityEnabled()) |
| return; |
| m_replacedText = textDeletedByUnapply(); |
| } |
| |
| static String stringForVisiblePositionIndexRange(const VisiblePositionIndexRange& range) |
| { |
| if (range.isNull()) |
| return String(); |
| VisiblePosition start = visiblePositionForIndex(range.startIndex.value, range.startIndex.scope.get()); |
| VisiblePosition end = visiblePositionForIndex(range.endIndex.value, range.endIndex.scope.get()); |
| return AccessibilityObject::stringForVisiblePositionRange(VisiblePositionRange(start, end)); |
| } |
| |
| String AccessibilityUndoReplacedText::textDeletedByUnapply() |
| { |
| if (!AXObjectCache::accessibilityEnabled()) |
| return String(); |
| return stringForVisiblePositionIndexRange(m_rangeDeletedByUnapply); |
| } |
| |
| String AccessibilityUndoReplacedText::textDeletedByReapply() |
| { |
| if (!AXObjectCache::accessibilityEnabled()) |
| return String(); |
| return stringForVisiblePositionIndexRange(m_rangeDeletedByReapply); |
| } |
| |
| static void postTextStateChangeNotification(AXObjectCache* cache, const VisiblePosition& position, const String& deletedText, const String& insertedText) |
| { |
| ASSERT(cache); |
| auto* node = highestEditableRoot(position.deepEquivalent(), HasEditableAXRole); |
| if (!node) |
| return; |
| if (insertedText.length() && deletedText.length()) |
| cache->postTextReplacementNotification(node, AXTextEditTypeDelete, insertedText, AXTextEditTypeInsert, deletedText, position); |
| else if (deletedText.length()) |
| cache->postTextStateChangeNotification(node, AXTextEditTypeInsert, deletedText, position); |
| else if (insertedText.length()) |
| cache->postTextStateChangeNotification(node, AXTextEditTypeDelete, insertedText, position); |
| } |
| |
| void AccessibilityUndoReplacedText::postTextStateChangeNotificationForUnapply(AXObjectCache* cache) |
| { |
| if (!cache) |
| return; |
| if (!AXObjectCache::accessibilityEnabled()) |
| return; |
| if (m_rangeDeletedByUnapply.isNull()) |
| return; |
| VisiblePosition position = visiblePositionForIndex(m_rangeDeletedByUnapply.endIndex.value, m_rangeDeletedByUnapply.endIndex.scope.get()); |
| if (position.isNull()) |
| return; |
| postTextStateChangeNotification(cache, position, textDeletedByUnapply(), m_replacedText); |
| m_replacedText = String(); |
| } |
| |
| void AccessibilityUndoReplacedText::postTextStateChangeNotificationForReapply(AXObjectCache* cache) |
| { |
| if (!cache) |
| return; |
| if (!AXObjectCache::accessibilityEnabled()) |
| return; |
| if (m_rangeDeletedByReapply.isNull()) |
| return; |
| VisiblePosition position = visiblePositionForIndex(m_rangeDeletedByReapply.startIndex.value, m_rangeDeletedByReapply.startIndex.scope.get()); |
| if (position.isNull()) |
| return; |
| postTextStateChangeNotification(cache, position, textDeletedByReapply(), m_replacedText); |
| m_replacedText = String(); |
| } |
| |
| Ref<EditCommandComposition> EditCommandComposition::create(Document& document, |
| const VisibleSelection& startingSelection, const VisibleSelection& endingSelection, EditAction editAction) |
| { |
| return adoptRef(*new EditCommandComposition(document, startingSelection, endingSelection, editAction)); |
| } |
| |
| EditCommandComposition::EditCommandComposition(Document& document, const VisibleSelection& startingSelection, const VisibleSelection& endingSelection, EditAction editAction) |
| : m_document(&document) |
| , m_startingSelection(startingSelection) |
| , m_endingSelection(endingSelection) |
| , m_startingRootEditableElement(startingSelection.rootEditableElement()) |
| , m_endingRootEditableElement(endingSelection.rootEditableElement()) |
| , m_editAction(editAction) |
| { |
| m_replacedText.configureRangeDeletedByReapplyWithStartingSelection(startingSelection); |
| } |
| |
| void EditCommandComposition::unapply() |
| { |
| ASSERT(m_document); |
| RefPtr<Frame> frame = m_document->frame(); |
| if (!frame) |
| return; |
| |
| m_replacedText.captureTextForUnapply(); |
| |
| // Changes to the document may have been made since the last editing operation that require a layout, as in <rdar://problem/5658603>. |
| // Low level operations, like RemoveNodeCommand, don't require a layout because the high level operations that use them perform one |
| // if one is necessary (like for the creation of VisiblePositions). |
| m_document->updateLayoutIgnorePendingStylesheets(); |
| #if PLATFORM(IOS_FAMILY) |
| // FIXME: Where should iPhone code deal with the composition? |
| // Since editing commands don't save/restore the composition, undoing without fixing |
| // up the composition will leave a stale, invalid composition, as in <rdar://problem/6831637>. |
| // Desktop handles this in -[WebHTMLView _updateSelectionForInputManager], but the phone |
| // goes another route. |
| frame->editor().cancelComposition(); |
| #endif |
| |
| if (!frame->editor().willUnapplyEditing(*this)) |
| return; |
| |
| size_t size = m_commands.size(); |
| for (size_t i = size; i; --i) |
| m_commands[i - 1]->doUnapply(); |
| |
| frame->editor().unappliedEditing(*this); |
| |
| if (AXObjectCache::accessibilityEnabled()) |
| m_replacedText.postTextStateChangeNotificationForUnapply(m_document->existingAXObjectCache()); |
| } |
| |
| void EditCommandComposition::reapply() |
| { |
| ASSERT(m_document); |
| RefPtr<Frame> frame = m_document->frame(); |
| if (!frame) |
| return; |
| |
| m_replacedText.captureTextForReapply(); |
| |
| // Changes to the document may have been made since the last editing operation that require a layout, as in <rdar://problem/5658603>. |
| // Low level operations, like RemoveNodeCommand, don't require a layout because the high level operations that use them perform one |
| // if one is necessary (like for the creation of VisiblePositions). |
| m_document->updateLayoutIgnorePendingStylesheets(); |
| |
| if (!frame->editor().willReapplyEditing(*this)) |
| return; |
| |
| for (auto& command : m_commands) |
| command->doReapply(); |
| |
| frame->editor().reappliedEditing(*this); |
| |
| if (AXObjectCache::accessibilityEnabled()) |
| m_replacedText.postTextStateChangeNotificationForReapply(m_document->existingAXObjectCache()); |
| } |
| |
| void EditCommandComposition::append(SimpleEditCommand* command) |
| { |
| m_commands.append(command); |
| } |
| |
| void EditCommandComposition::setStartingSelection(const VisibleSelection& selection) |
| { |
| m_startingSelection = selection; |
| m_startingRootEditableElement = selection.rootEditableElement(); |
| m_replacedText.configureRangeDeletedByReapplyWithStartingSelection(selection); |
| } |
| |
| void EditCommandComposition::setEndingSelection(const VisibleSelection& selection) |
| { |
| m_endingSelection = selection; |
| m_endingRootEditableElement = selection.rootEditableElement(); |
| m_replacedText.configureRangeDeletedByReapplyWithEndingSelection(selection); |
| } |
| |
| void EditCommandComposition::setRangeDeletedByUnapply(const VisiblePositionIndexRange& range) |
| { |
| m_replacedText.setRangeDeletedByUnapply(range); |
| } |
| |
| #ifndef NDEBUG |
| void EditCommandComposition::getNodesInCommand(HashSet<Node*>& nodes) |
| { |
| for (auto& command : m_commands) |
| command->getNodesInCommand(nodes); |
| } |
| #endif |
| |
| String EditCommandComposition::label() const |
| { |
| return undoRedoLabel(m_editAction); |
| } |
| |
| CompositeEditCommand::CompositeEditCommand(Document& document, EditAction editingAction) |
| : EditCommand(document, editingAction) |
| { |
| } |
| |
| CompositeEditCommand::~CompositeEditCommand() |
| { |
| ASSERT(isTopLevelCommand() || !m_composition); |
| } |
| |
| bool CompositeEditCommand::willApplyCommand() |
| { |
| return frame().editor().willApplyEditing(*this, targetRangesForBindings()); |
| } |
| |
| void CompositeEditCommand::apply() |
| { |
| if (!endingSelection().isContentRichlyEditable()) { |
| switch (editingAction()) { |
| case EditAction::TypingDeleteSelection: |
| case EditAction::TypingDeleteBackward: |
| case EditAction::TypingDeleteForward: |
| case EditAction::TypingDeleteWordBackward: |
| case EditAction::TypingDeleteWordForward: |
| case EditAction::TypingDeleteLineBackward: |
| case EditAction::TypingDeleteLineForward: |
| case EditAction::TypingDeletePendingComposition: |
| case EditAction::TypingDeleteFinalComposition: |
| case EditAction::TypingInsertText: |
| case EditAction::TypingInsertLineBreak: |
| case EditAction::TypingInsertParagraph: |
| case EditAction::TypingInsertPendingComposition: |
| case EditAction::TypingInsertFinalComposition: |
| case EditAction::Paste: |
| case EditAction::DeleteByDrag: |
| case EditAction::SetInlineWritingDirection: |
| case EditAction::SetBlockWritingDirection: |
| case EditAction::Cut: |
| case EditAction::Unspecified: |
| case EditAction::Insert: |
| case EditAction::InsertReplacement: |
| case EditAction::InsertFromDrop: |
| case EditAction::Delete: |
| case EditAction::Dictation: |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| return; |
| } |
| } |
| ensureComposition(); |
| |
| // Changes to the document may have been made since the last editing operation that require a layout, as in <rdar://problem/5658603>. |
| // Low level operations, like RemoveNodeCommand, don't require a layout because the high level operations that use them perform one |
| // if one is necessary (like for the creation of VisiblePositions). |
| document().updateLayoutIgnorePendingStylesheets(); |
| |
| if (!willApplyCommand()) |
| return; |
| |
| { |
| EventQueueScope eventQueueScope; |
| doApply(); |
| } |
| |
| didApplyCommand(); |
| setShouldRetainAutocorrectionIndicator(false); |
| } |
| |
| void CompositeEditCommand::didApplyCommand() |
| { |
| frame().editor().appliedEditing(*this); |
| } |
| |
| Vector<RefPtr<StaticRange>> CompositeEditCommand::targetRanges() const |
| { |
| ASSERT(!isEditingTextAreaOrTextInput()); |
| auto firstRange = frame().selection().selection().firstRange(); |
| if (!firstRange) |
| return { }; |
| |
| return { 1, StaticRange::createFromRange(*firstRange) }; |
| } |
| |
| Vector<RefPtr<StaticRange>> CompositeEditCommand::targetRangesForBindings() const |
| { |
| if (isEditingTextAreaOrTextInput()) |
| return { }; |
| |
| return targetRanges(); |
| } |
| |
| RefPtr<DataTransfer> CompositeEditCommand::inputEventDataTransfer() const |
| { |
| return nullptr; |
| } |
| |
| EditCommandComposition* CompositeEditCommand::composition() const |
| { |
| for (auto* command = this; command; command = command->parent()) { |
| if (auto composition = command->m_composition) { |
| ASSERT(!command->parent()); |
| return composition.get(); |
| } |
| } |
| return nullptr; |
| } |
| |
| EditCommandComposition& CompositeEditCommand::ensureComposition() |
| { |
| auto* command = this; |
| while (auto* parent = command->parent()) |
| command = parent; |
| if (!command->m_composition) |
| command->m_composition = EditCommandComposition::create(document(), startingSelection(), endingSelection(), editingAction()); |
| return *command->m_composition; |
| } |
| |
| bool CompositeEditCommand::isCreateLinkCommand() const |
| { |
| return false; |
| } |
| |
| bool CompositeEditCommand::preservesTypingStyle() const |
| { |
| return false; |
| } |
| |
| bool CompositeEditCommand::isTypingCommand() const |
| { |
| return false; |
| } |
| |
| bool CompositeEditCommand::shouldRetainAutocorrectionIndicator() const |
| { |
| return false; |
| } |
| |
| void CompositeEditCommand::setShouldRetainAutocorrectionIndicator(bool) |
| { |
| } |
| |
| String CompositeEditCommand::inputEventTypeName() const |
| { |
| return inputTypeNameForEditingAction(editingAction()); |
| } |
| |
| // |
| // sugary-sweet convenience functions to help create and apply edit commands in composite commands |
| // |
| void CompositeEditCommand::applyCommandToComposite(Ref<EditCommand>&& command) |
| { |
| command->setParent(this); |
| command->doApply(); |
| if (command->isSimpleEditCommand()) { |
| command->setParent(nullptr); |
| ensureComposition().append(toSimpleEditCommand(command.ptr())); |
| } |
| m_commands.append(WTFMove(command)); |
| } |
| |
| void CompositeEditCommand::applyCommandToComposite(Ref<CompositeEditCommand>&& command, const VisibleSelection& selection) |
| { |
| command->setParent(this); |
| if (selection != command->endingSelection()) { |
| command->setStartingSelection(selection); |
| command->setEndingSelection(selection); |
| } |
| command->doApply(); |
| m_commands.append(WTFMove(command)); |
| } |
| |
| void CompositeEditCommand::applyStyle(const EditingStyle* style, EditAction editingAction) |
| { |
| applyCommandToComposite(ApplyStyleCommand::create(document(), style, editingAction)); |
| } |
| |
| void CompositeEditCommand::applyStyle(const EditingStyle* style, const Position& start, const Position& end, EditAction editingAction) |
| { |
| applyCommandToComposite(ApplyStyleCommand::create(document(), style, start, end, editingAction)); |
| } |
| |
| void CompositeEditCommand::applyStyledElement(Ref<Element>&& element) |
| { |
| applyCommandToComposite(ApplyStyleCommand::create(WTFMove(element), false)); |
| } |
| |
| void CompositeEditCommand::removeStyledElement(Ref<Element>&& element) |
| { |
| applyCommandToComposite(ApplyStyleCommand::create(WTFMove(element), true)); |
| } |
| |
| void CompositeEditCommand::insertParagraphSeparator(bool useDefaultParagraphElement, bool pasteBlockqutoeIntoUnquotedArea) |
| { |
| applyCommandToComposite(InsertParagraphSeparatorCommand::create(document(), useDefaultParagraphElement, pasteBlockqutoeIntoUnquotedArea, editingAction())); |
| } |
| |
| void CompositeEditCommand::insertLineBreak() |
| { |
| applyCommandToComposite(InsertLineBreakCommand::create(document())); |
| } |
| |
| bool CompositeEditCommand::isRemovableBlock(const Node* node) |
| { |
| ASSERT(node); |
| if (!is<HTMLDivElement>(*node)) |
| return false; |
| |
| Node* parentNode = node->parentNode(); |
| if (parentNode && parentNode->firstChild() != parentNode->lastChild()) |
| return false; |
| |
| if (!downcast<HTMLDivElement>(*node).hasAttributes()) |
| return true; |
| |
| return false; |
| } |
| |
| void CompositeEditCommand::insertNodeBefore(Ref<Node>&& insertChild, Node& refChild, ShouldAssumeContentIsAlwaysEditable shouldAssumeContentIsAlwaysEditable) |
| { |
| applyCommandToComposite(InsertNodeBeforeCommand::create(WTFMove(insertChild), refChild, shouldAssumeContentIsAlwaysEditable, editingAction())); |
| } |
| |
| void CompositeEditCommand::insertNodeAfter(Ref<Node>&& insertChild, Node& refChild) |
| { |
| ContainerNode* parent = refChild.parentNode(); |
| if (!parent) |
| return; |
| |
| ASSERT(!parent->isShadowRoot()); |
| if (parent->lastChild() == &refChild) |
| appendNode(WTFMove(insertChild), *parent); |
| else { |
| ASSERT(refChild.nextSibling()); |
| insertNodeBefore(WTFMove(insertChild), *refChild.nextSibling()); |
| } |
| } |
| |
| void CompositeEditCommand::insertNodeAt(Ref<Node>&& insertChild, const Position& editingPosition) |
| { |
| ASSERT(isEditablePosition(editingPosition)); |
| // For editing positions like [table, 0], insert before the table, |
| // likewise for replaced elements, brs, etc. |
| Position p = editingPosition.parentAnchoredEquivalent(); |
| Node* refChild = p.deprecatedNode(); |
| int offset = p.deprecatedEditingOffset(); |
| |
| if (canHaveChildrenForEditing(*refChild)) { |
| Node* child = refChild->firstChild(); |
| for (int i = 0; child && i < offset; i++) |
| child = child->nextSibling(); |
| if (child) |
| insertNodeBefore(WTFMove(insertChild), *child); |
| else |
| appendNode(WTFMove(insertChild), downcast<ContainerNode>(*refChild)); |
| } else if (caretMinOffset(*refChild) >= offset) |
| insertNodeBefore(WTFMove(insertChild), *refChild); |
| else if (is<Text>(*refChild) && caretMaxOffset(*refChild) > offset) { |
| splitTextNode(downcast<Text>(*refChild), offset); |
| |
| // Mutation events (bug 22634) from the text node insertion may have removed the refChild |
| if (!refChild->isConnected()) |
| return; |
| insertNodeBefore(WTFMove(insertChild), *refChild); |
| } else |
| insertNodeAfter(WTFMove(insertChild), *refChild); |
| } |
| |
| void CompositeEditCommand::appendNode(Ref<Node>&& node, Ref<ContainerNode>&& parent) |
| { |
| ASSERT(canHaveChildrenForEditing(parent)); |
| applyCommandToComposite(AppendNodeCommand::create(WTFMove(parent), WTFMove(node), editingAction())); |
| } |
| |
| void CompositeEditCommand::removeChildrenInRange(Node& node, unsigned from, unsigned to) |
| { |
| Vector<Ref<Node>> children; |
| Node* child = node.traverseToChildAt(from); |
| for (unsigned i = from; child && i < to; i++, child = child->nextSibling()) |
| children.append(*child); |
| |
| for (auto& child : children) |
| removeNode(child); |
| } |
| |
| void CompositeEditCommand::removeNode(Node& node, ShouldAssumeContentIsAlwaysEditable shouldAssumeContentIsAlwaysEditable) |
| { |
| if (!node.nonShadowBoundaryParentNode()) |
| return; |
| applyCommandToComposite(RemoveNodeCommand::create(node, shouldAssumeContentIsAlwaysEditable, editingAction())); |
| } |
| |
| void CompositeEditCommand::removeNodePreservingChildren(Node& node, ShouldAssumeContentIsAlwaysEditable shouldAssumeContentIsAlwaysEditable) |
| { |
| applyCommandToComposite(RemoveNodePreservingChildrenCommand::create(node, shouldAssumeContentIsAlwaysEditable, editingAction())); |
| } |
| |
| void CompositeEditCommand::removeNodeAndPruneAncestors(Node& node) |
| { |
| RefPtr<ContainerNode> parent = node.parentNode(); |
| removeNode(node); |
| prune(parent.get()); |
| } |
| |
| void CompositeEditCommand::moveRemainingSiblingsToNewParent(Node* node, Node* pastLastNodeToMove, Element& newParent) |
| { |
| NodeVector nodesToRemove; |
| Ref<Element> protectedNewParent = newParent; |
| |
| for (; node && node != pastLastNodeToMove; node = node->nextSibling()) |
| nodesToRemove.append(*node); |
| |
| for (auto& nodeToRemove : nodesToRemove) { |
| removeNode(nodeToRemove); |
| appendNode(WTFMove(nodeToRemove), newParent); |
| } |
| } |
| |
| void CompositeEditCommand::updatePositionForNodeRemovalPreservingChildren(Position& position, Node& node) |
| { |
| int offset = (position.anchorType() == Position::PositionIsOffsetInAnchor) ? position.offsetInContainerNode() : 0; |
| updatePositionForNodeRemoval(position, node); |
| if (offset) |
| position.moveToOffset(offset); |
| } |
| |
| HTMLElement* CompositeEditCommand::replaceElementWithSpanPreservingChildrenAndAttributes(HTMLElement& element) |
| { |
| // It would also be possible to implement all of ReplaceNodeWithSpanCommand |
| // as a series of existing smaller edit commands. Someone who wanted to |
| // reduce the number of edit commands could do so here. |
| auto command = ReplaceNodeWithSpanCommand::create(element); |
| auto* commandPtr = command.ptr(); |
| applyCommandToComposite(WTFMove(command)); |
| // Returning a raw pointer here is OK because the command is retained by |
| // applyCommandToComposite (thus retaining the span), and the span is also |
| // in the DOM tree, and thus alive whie it has a parent. |
| ASSERT(commandPtr->spanElement()->isConnected()); |
| return commandPtr->spanElement(); |
| } |
| |
| void CompositeEditCommand::prune(Node* node) |
| { |
| if (auto* highestNodeToRemove = highestNodeToRemoveInPruning(node)) |
| removeNode(*highestNodeToRemove); |
| } |
| |
| void CompositeEditCommand::splitTextNode(Text& node, unsigned offset) |
| { |
| applyCommandToComposite(SplitTextNodeCommand::create(node, offset)); |
| } |
| |
| void CompositeEditCommand::splitElement(Element& element, Node& atChild) |
| { |
| applyCommandToComposite(SplitElementCommand::create(element, atChild)); |
| } |
| |
| void CompositeEditCommand::mergeIdenticalElements(Element& first, Element& second) |
| { |
| Ref<Element> protectedFirst = first; |
| Ref<Element> protectedSecond = second; |
| ASSERT(!first.isDescendantOf(&second) && &second != &first); |
| if (first.nextSibling() != &second) { |
| removeNode(second); |
| insertNodeAfter(second, first); |
| } |
| applyCommandToComposite(MergeIdenticalElementsCommand::create(first, second)); |
| } |
| |
| void CompositeEditCommand::wrapContentsInDummySpan(Element& element) |
| { |
| applyCommandToComposite(WrapContentsInDummySpanCommand::create(element)); |
| } |
| |
| void CompositeEditCommand::splitTextNodeContainingElement(Text& text, unsigned offset) |
| { |
| applyCommandToComposite(SplitTextNodeContainingElementCommand::create(text, offset)); |
| } |
| |
| void CompositeEditCommand::inputText(const String& text, bool selectInsertedText) |
| { |
| unsigned offset = 0; |
| unsigned length = text.length(); |
| |
| RefPtr<ContainerNode> scope; |
| unsigned startIndex = indexForVisiblePosition(endingSelection().visibleStart(), scope); |
| |
| size_t newline; |
| do { |
| newline = text.find('\n', offset); |
| if (newline != offset) { |
| int substringLength = newline == notFound ? length - offset : newline - offset; |
| applyCommandToComposite(InsertTextCommand::create(document(), text.substring(offset, substringLength), false)); |
| } |
| if (newline != notFound) { |
| VisiblePosition caret(endingSelection().visibleStart()); |
| if (enclosingNodeOfType(caret.deepEquivalent(), &isMailBlockquote)) { |
| // FIXME: Breaking a blockquote when the caret is just after a space will collapse the |
| // space. Modify startIndex or length to compensate for this so that the ending selection |
| // will be positioned correctly. |
| // <rdar://problem/9914462> breaking a Mail blockquote just after a space collapses the space |
| if (caret.previous().characterAfter() == ' ') { |
| if (!offset && !startIndex) |
| startIndex--; |
| else if (!length) |
| length--; |
| } |
| applyCommandToComposite(BreakBlockquoteCommand::create(document())); |
| } else |
| insertLineBreak(); |
| } |
| |
| offset = newline + 1; |
| } while (newline != notFound && offset != length); |
| |
| if (selectInsertedText) |
| setEndingSelection(VisibleSelection(visiblePositionForIndex(startIndex, scope.get()), visiblePositionForIndex(startIndex + length, scope.get()))); |
| } |
| |
| void CompositeEditCommand::insertTextIntoNode(Text& node, unsigned offset, const String& text) |
| { |
| if (!text.isEmpty()) |
| applyCommandToComposite(InsertIntoTextNodeCommand::create(node, offset, text, editingAction())); |
| } |
| |
| void CompositeEditCommand::deleteTextFromNode(Text& node, unsigned offset, unsigned count) |
| { |
| applyCommandToComposite(DeleteFromTextNodeCommand::create(node, offset, count, editingAction())); |
| } |
| |
| void CompositeEditCommand::replaceTextInNode(Text& node, unsigned offset, unsigned count, const String& replacementText) |
| { |
| applyCommandToComposite(DeleteFromTextNodeCommand::create(node, offset, count)); |
| if (!replacementText.isEmpty()) |
| applyCommandToComposite(InsertIntoTextNodeCommand::create(node, offset, replacementText, editingAction())); |
| } |
| |
| Position CompositeEditCommand::replaceSelectedTextInNode(const String& text) |
| { |
| Position start = endingSelection().start(); |
| Position end = endingSelection().end(); |
| if (start.containerNode() != end.containerNode() || !start.containerNode()->isTextNode() || isTabSpanTextNode(start.containerNode())) |
| return Position(); |
| |
| RefPtr<Text> textNode = start.containerText(); |
| replaceTextInNode(*textNode, start.offsetInContainerNode(), end.offsetInContainerNode() - start.offsetInContainerNode(), text); |
| |
| return Position(textNode.get(), start.offsetInContainerNode() + text.length()); |
| } |
| |
| static Vector<RenderedDocumentMarker> copyMarkers(const Vector<RenderedDocumentMarker*>& markerPointers) |
| { |
| Vector<RenderedDocumentMarker> markers; |
| markers.reserveInitialCapacity(markerPointers.size()); |
| for (auto& markerPointer : markerPointers) |
| markers.uncheckedAppend(*markerPointer); |
| |
| return markers; |
| } |
| |
| void CompositeEditCommand::replaceTextInNodePreservingMarkers(Text& node, unsigned offset, unsigned count, const String& replacementText) |
| { |
| Ref<Text> protectedNode(node); |
| DocumentMarkerController& markerController = document().markers(); |
| auto markers = copyMarkers(markerController.markersInRange(Range::create(document(), &node, offset, &node, offset + count), DocumentMarker::allMarkers())); |
| replaceTextInNode(node, offset, count, replacementText); |
| auto newRange = Range::create(document(), &node, offset, &node, offset + replacementText.length()); |
| for (const auto& marker : markers) { |
| #if PLATFORM(IOS_FAMILY) |
| if (marker.isDictation()) { |
| markerController.addMarker(newRange, marker.type(), marker.description(), marker.alternatives(), marker.metadata()); |
| continue; |
| } |
| #endif |
| #if ENABLE(PLATFORM_DRIVEN_TEXT_CHECKING) |
| if (marker.type() == DocumentMarker::PlatformTextChecking) { |
| if (!WTF::holds_alternative<DocumentMarker::PlatformTextCheckingData>(marker.data())) { |
| ASSERT_NOT_REACHED(); |
| continue; |
| } |
| |
| auto& textCheckingData = WTF::get<DocumentMarker::PlatformTextCheckingData>(marker.data()); |
| markerController.addPlatformTextCheckingMarker(newRange, textCheckingData.key, textCheckingData.value); |
| continue; |
| } |
| #endif |
| markerController.addMarker(newRange, marker.type(), marker.description()); |
| } |
| } |
| |
| Position CompositeEditCommand::positionOutsideTabSpan(const Position& position) |
| { |
| if (!isTabSpanTextNode(position.anchorNode())) |
| return position; |
| |
| switch (position.anchorType()) { |
| case Position::PositionIsBeforeChildren: |
| case Position::PositionIsAfterChildren: |
| ASSERT_NOT_REACHED(); |
| return position; |
| case Position::PositionIsOffsetInAnchor: |
| break; |
| case Position::PositionIsBeforeAnchor: |
| return positionInParentBeforeNode(position.anchorNode()); |
| case Position::PositionIsAfterAnchor: |
| return positionInParentAfterNode(position.anchorNode()); |
| } |
| |
| auto* tabSpan = tabSpanNode(position.containerNode()); |
| |
| if (position.offsetInContainerNode() <= caretMinOffset(*position.containerNode())) |
| return positionInParentBeforeNode(tabSpan); |
| |
| if (position.offsetInContainerNode() >= caretMaxOffset(*position.containerNode())) |
| return positionInParentAfterNode(tabSpan); |
| |
| splitTextNodeContainingElement(downcast<Text>(*position.containerNode()), position.offsetInContainerNode()); |
| return positionInParentBeforeNode(tabSpan); |
| } |
| |
| void CompositeEditCommand::insertNodeAtTabSpanPosition(Ref<Node>&& node, const Position& pos) |
| { |
| // insert node before, after, or at split of tab span |
| insertNodeAt(WTFMove(node), positionOutsideTabSpan(pos)); |
| } |
| |
| static EditAction deleteSelectionEditingActionForEditingAction(EditAction editingAction) |
| { |
| switch (editingAction) { |
| case EditAction::Cut: |
| return EditAction::Cut; |
| default: |
| return EditAction::Delete; |
| } |
| } |
| |
| void CompositeEditCommand::deleteSelection(bool smartDelete, bool mergeBlocksAfterDelete, bool replace, bool expandForSpecialElements, bool sanitizeMarkup) |
| { |
| if (endingSelection().isRange()) |
| applyCommandToComposite(DeleteSelectionCommand::create(document(), smartDelete, mergeBlocksAfterDelete, replace, expandForSpecialElements, sanitizeMarkup, deleteSelectionEditingActionForEditingAction(editingAction()))); |
| } |
| |
| void CompositeEditCommand::deleteSelection(const VisibleSelection &selection, bool smartDelete, bool mergeBlocksAfterDelete, bool replace, bool expandForSpecialElements, bool sanitizeMarkup) |
| { |
| if (selection.isRange()) |
| applyCommandToComposite(DeleteSelectionCommand::create(selection, smartDelete, mergeBlocksAfterDelete, replace, expandForSpecialElements, sanitizeMarkup)); |
| } |
| |
| void CompositeEditCommand::removeNodeAttribute(Element& element, const QualifiedName& attribute) |
| { |
| setNodeAttribute(element, attribute, nullAtom()); |
| } |
| |
| void CompositeEditCommand::setNodeAttribute(Element& element, const QualifiedName& attribute, const AtomString& value) |
| { |
| applyCommandToComposite(SetNodeAttributeCommand::create(element, attribute, value)); |
| } |
| |
| static inline bool containsOnlyDeprecatedEditingWhitespace(const String& text) |
| { |
| for (unsigned i = 0; i < text.length(); ++i) { |
| if (!deprecatedIsEditingWhitespace(text[i])) |
| return false; |
| } |
| return true; |
| } |
| |
| bool CompositeEditCommand::shouldRebalanceLeadingWhitespaceFor(const String& text) const |
| { |
| return containsOnlyDeprecatedEditingWhitespace(text); |
| } |
| |
| bool CompositeEditCommand::canRebalance(const Position& position) const |
| { |
| Node* node = position.containerNode(); |
| if (position.anchorType() != Position::PositionIsOffsetInAnchor || !is<Text>(node)) |
| return false; |
| |
| Text& textNode = downcast<Text>(*node); |
| if (!textNode.length()) |
| return false; |
| |
| node->document().updateStyleIfNeeded(); |
| |
| RenderObject* renderer = textNode.renderer(); |
| if (renderer && !renderer->style().collapseWhiteSpace()) |
| return false; |
| |
| return true; |
| } |
| |
| // FIXME: Doesn't go into text nodes that contribute adjacent text (siblings, cousins, etc). |
| void CompositeEditCommand::rebalanceWhitespaceAt(const Position& position) |
| { |
| Node* node = position.containerNode(); |
| if (!canRebalance(position)) |
| return; |
| |
| // If the rebalance is for the single offset, and neither text[offset] nor text[offset - 1] are some form of whitespace, do nothing. |
| int offset = position.deprecatedEditingOffset(); |
| String text = downcast<Text>(*node).data(); |
| if (!deprecatedIsEditingWhitespace(text[offset])) { |
| offset--; |
| if (offset < 0 || !deprecatedIsEditingWhitespace(text[offset])) |
| return; |
| } |
| |
| rebalanceWhitespaceOnTextSubstring(downcast<Text>(*node), position.offsetInContainerNode(), position.offsetInContainerNode()); |
| } |
| |
| void CompositeEditCommand::rebalanceWhitespaceOnTextSubstring(Text& textNode, int startOffset, int endOffset) |
| { |
| String text = textNode.data(); |
| ASSERT(!text.isEmpty()); |
| |
| // Set upstream and downstream to define the extent of the whitespace surrounding text[offset]. |
| int upstream = startOffset; |
| while (upstream > 0 && deprecatedIsEditingWhitespace(text[upstream - 1])) |
| upstream--; |
| |
| int downstream = endOffset; |
| while ((unsigned)downstream < text.length() && deprecatedIsEditingWhitespace(text[downstream])) |
| downstream++; |
| |
| int length = downstream - upstream; |
| if (!length) |
| return; |
| |
| VisiblePosition visibleUpstreamPos(Position(&textNode, upstream)); |
| VisiblePosition visibleDownstreamPos(Position(&textNode, downstream)); |
| |
| String string = text.substring(upstream, length); |
| String rebalancedString = stringWithRebalancedWhitespace(string, |
| // FIXME: Because of the problem mentioned at the top of this function, we must also use nbsps at the start/end of the string because |
| // this function doesn't get all surrounding whitespace, just the whitespace in the current text node. |
| isStartOfParagraph(visibleUpstreamPos) || upstream == 0, |
| isEndOfParagraph(visibleDownstreamPos) || (unsigned)downstream == text.length()); |
| |
| if (string != rebalancedString) |
| replaceTextInNodePreservingMarkers(textNode, upstream, length, rebalancedString); |
| } |
| |
| void CompositeEditCommand::prepareWhitespaceAtPositionForSplit(Position& position) |
| { |
| Node* node = position.deprecatedNode(); |
| if (!is<Text>(node)) |
| return; |
| Text& textNode = downcast<Text>(*node); |
| |
| if (!textNode.length()) |
| return; |
| RenderObject* renderer = textNode.renderer(); |
| if (renderer && !renderer->style().collapseWhiteSpace()) |
| return; |
| |
| // Delete collapsed whitespace so that inserting nbsps doesn't uncollapse it. |
| Position upstreamPos = position.upstream(); |
| deleteInsignificantText(position.upstream(), position.downstream()); |
| position = upstreamPos.downstream(); |
| |
| VisiblePosition visiblePos(position); |
| VisiblePosition previousVisiblePos(visiblePos.previous()); |
| Position previous(previousVisiblePos.deepEquivalent()); |
| |
| if (deprecatedIsCollapsibleWhitespace(previousVisiblePos.characterAfter()) && is<Text>(*previous.deprecatedNode()) && !is<HTMLBRElement>(*previous.deprecatedNode())) |
| replaceTextInNodePreservingMarkers(downcast<Text>(*previous.deprecatedNode()), previous.deprecatedEditingOffset(), 1, nonBreakingSpaceString()); |
| if (deprecatedIsCollapsibleWhitespace(visiblePos.characterAfter()) && is<Text>(*position.deprecatedNode()) && !is<HTMLBRElement>(*position.deprecatedNode())) |
| replaceTextInNodePreservingMarkers(downcast<Text>(*position.deprecatedNode()), position.deprecatedEditingOffset(), 1, nonBreakingSpaceString()); |
| } |
| |
| void CompositeEditCommand::rebalanceWhitespace() |
| { |
| VisibleSelection selection = endingSelection(); |
| if (selection.isNone()) |
| return; |
| |
| rebalanceWhitespaceAt(selection.start()); |
| if (selection.isRange()) |
| rebalanceWhitespaceAt(selection.end()); |
| } |
| |
| void CompositeEditCommand::deleteInsignificantText(Text& textNode, unsigned start, unsigned end) |
| { |
| if (start >= end) |
| return; |
| |
| document().updateLayout(); |
| |
| RenderText* textRenderer = textNode.renderer(); |
| if (!textRenderer) |
| return; |
| |
| Vector<InlineTextBox*> sortedTextBoxes; |
| size_t sortedTextBoxesPosition = 0; |
| |
| for (InlineTextBox* textBox = textRenderer->firstTextBox(); textBox; textBox = textBox->nextTextBox()) |
| sortedTextBoxes.append(textBox); |
| |
| // If there is mixed directionality text, the boxes can be out of order, |
| // (like Arabic with embedded LTR), so sort them first. |
| if (textRenderer->containsReversedText()) |
| std::sort(sortedTextBoxes.begin(), sortedTextBoxes.end(), InlineTextBox::compareByStart); |
| InlineTextBox* box = sortedTextBoxes.isEmpty() ? 0 : sortedTextBoxes[sortedTextBoxesPosition]; |
| |
| if (!box) { |
| // whole text node is empty |
| removeNode(textNode); |
| return; |
| } |
| |
| unsigned length = textNode.length(); |
| if (start >= length || end > length) |
| return; |
| |
| unsigned removed = 0; |
| InlineTextBox* prevBox = nullptr; |
| String str; |
| |
| // This loop structure works to process all gaps preceding a box, |
| // and also will look at the gap after the last box. |
| while (prevBox || box) { |
| unsigned gapStart = prevBox ? prevBox->start() + prevBox->len() : 0; |
| if (end < gapStart) |
| // No more chance for any intersections |
| break; |
| |
| unsigned gapEnd = box ? box->start() : length; |
| bool indicesIntersect = start <= gapEnd && end >= gapStart; |
| int gapLen = gapEnd - gapStart; |
| if (indicesIntersect && gapLen > 0) { |
| gapStart = std::max(gapStart, start); |
| gapEnd = std::min(gapEnd, end); |
| if (str.isNull()) |
| str = textNode.data().substring(start, end - start); |
| // remove text in the gap |
| str.remove(gapStart - start - removed, gapLen); |
| removed += gapLen; |
| } |
| |
| prevBox = box; |
| if (box) { |
| if (++sortedTextBoxesPosition < sortedTextBoxes.size()) |
| box = sortedTextBoxes[sortedTextBoxesPosition]; |
| else |
| box = nullptr; |
| } |
| } |
| |
| if (!str.isNull()) { |
| // Replace the text between start and end with our pruned version. |
| if (!str.isEmpty()) |
| replaceTextInNode(textNode, start, end - start, str); |
| else { |
| // Assert that we are not going to delete all of the text in the node. |
| // If we were, that should have been done above with the call to |
| // removeNode and return. |
| ASSERT(start > 0 || end - start < textNode.length()); |
| deleteTextFromNode(textNode, start, end - start); |
| } |
| } |
| } |
| |
| void CompositeEditCommand::deleteInsignificantText(const Position& start, const Position& end) |
| { |
| if (start.isNull() || end.isNull()) |
| return; |
| |
| if (comparePositions(start, end) >= 0) |
| return; |
| |
| Vector<Ref<Text>> nodes; |
| for (Node* node = start.deprecatedNode(); node; node = NodeTraversal::next(*node)) { |
| if (is<Text>(*node)) |
| nodes.append(downcast<Text>(*node)); |
| if (node == end.deprecatedNode()) |
| break; |
| } |
| |
| for (auto& textNode : nodes) { |
| int startOffset = textNode.ptr() == start.deprecatedNode() ? start.deprecatedEditingOffset() : 0; |
| int endOffset = textNode.ptr() == end.deprecatedNode() ? end.deprecatedEditingOffset() : static_cast<int>(textNode->length()); |
| deleteInsignificantText(textNode, startOffset, endOffset); |
| } |
| } |
| |
| void CompositeEditCommand::deleteInsignificantTextDownstream(const Position& pos) |
| { |
| Position end = VisiblePosition(pos, VP_DEFAULT_AFFINITY).next().deepEquivalent().downstream(); |
| deleteInsignificantText(pos, end); |
| } |
| |
| Ref<Element> CompositeEditCommand::appendBlockPlaceholder(Ref<Element>&& container) |
| { |
| document().updateLayoutIgnorePendingStylesheets(); |
| |
| // Should assert isBlockFlow || isInlineFlow when deletion improves. See 4244964. |
| ASSERT(container->renderer()); |
| |
| auto placeholder = createBlockPlaceholderElement(document()); |
| appendNode(placeholder.copyRef(), WTFMove(container)); |
| return placeholder; |
| } |
| |
| RefPtr<Node> CompositeEditCommand::insertBlockPlaceholder(const Position& pos) |
| { |
| if (pos.isNull()) |
| return nullptr; |
| |
| // Should assert isBlockFlow || isInlineFlow when deletion improves. See 4244964. |
| ASSERT(pos.deprecatedNode()->renderer()); |
| |
| auto placeholder = createBlockPlaceholderElement(document()); |
| insertNodeAt(placeholder.copyRef(), pos); |
| return placeholder; |
| } |
| |
| RefPtr<Node> CompositeEditCommand::addBlockPlaceholderIfNeeded(Element* container) |
| { |
| if (!container) |
| return nullptr; |
| |
| document().updateLayoutIgnorePendingStylesheets(); |
| |
| auto* renderer = container->renderer(); |
| if (!is<RenderBlockFlow>(renderer)) |
| return nullptr; |
| |
| // Append the placeholder to make sure it follows any unrendered blocks. |
| auto& blockFlow = downcast<RenderBlockFlow>(*renderer); |
| if (!blockFlow.height() || (blockFlow.isListItem() && !blockFlow.firstChild())) |
| return appendBlockPlaceholder(*container); |
| |
| return nullptr; |
| } |
| |
| // Assumes that the position is at a placeholder and does the removal without much checking. |
| void CompositeEditCommand::removePlaceholderAt(const Position& p) |
| { |
| ASSERT(lineBreakExistsAtPosition(p)); |
| |
| // We are certain that the position is at a line break, but it may be a br or a preserved newline. |
| if (is<HTMLBRElement>(*p.anchorNode())) { |
| removeNode(*p.anchorNode()); |
| return; |
| } |
| |
| deleteTextFromNode(downcast<Text>(*p.anchorNode()), p.offsetInContainerNode(), 1); |
| } |
| |
| Ref<HTMLElement> CompositeEditCommand::insertNewDefaultParagraphElementAt(const Position& position) |
| { |
| auto paragraphElement = createDefaultParagraphElement(document()); |
| paragraphElement->appendChild(HTMLBRElement::create(document())); |
| insertNodeAt(paragraphElement.copyRef(), position); |
| return paragraphElement; |
| } |
| |
| // If the paragraph is not entirely within it's own block, create one and move the paragraph into |
| // it, and return that block. Otherwise return 0. |
| RefPtr<Node> CompositeEditCommand::moveParagraphContentsToNewBlockIfNecessary(const Position& pos) |
| { |
| if (pos.isNull()) |
| return nullptr; |
| |
| document().updateLayoutIgnorePendingStylesheets(); |
| |
| // It's strange that this function is responsible for verifying that pos has not been invalidated |
| // by an earlier call to this function. The caller, applyBlockStyle, should do this. |
| VisiblePosition visiblePos(pos, VP_DEFAULT_AFFINITY); |
| VisiblePosition visibleParagraphStart(startOfParagraph(visiblePos)); |
| VisiblePosition visibleParagraphEnd = endOfParagraph(visiblePos); |
| VisiblePosition next = visibleParagraphEnd.next(); |
| VisiblePosition visibleEnd = next.isNotNull() ? next : visibleParagraphEnd; |
| |
| Position upstreamStart = visibleParagraphStart.deepEquivalent().upstream(); |
| Position upstreamEnd = visibleEnd.deepEquivalent().upstream(); |
| |
| // If there are no VisiblePositions in the same block as pos then |
| // upstreamStart will be outside the paragraph |
| if (comparePositions(pos, upstreamStart) < 0) |
| return nullptr; |
| |
| // Perform some checks to see if we need to perform work in this function. |
| if (isBlock(upstreamStart.deprecatedNode())) { |
| // If the block is the root editable element, always move content to a new block, |
| // since it is illegal to modify attributes on the root editable element for editing. |
| if (upstreamStart.deprecatedNode() == editableRootForPosition(upstreamStart)) { |
| // If the block is the root editable element and it contains no visible content, create a new |
| // block but don't try and move content into it, since there's nothing for moveParagraphs to move. |
| if (!Position::hasRenderedNonAnonymousDescendantsWithHeight(downcast<RenderElement>(*upstreamStart.deprecatedNode()->renderer()))) |
| return insertNewDefaultParagraphElementAt(upstreamStart); |
| } else if (isBlock(upstreamEnd.deprecatedNode())) { |
| if (!upstreamEnd.deprecatedNode()->isDescendantOf(upstreamStart.deprecatedNode())) { |
| // If the paragraph end is a descendant of paragraph start, then we need to run |
| // the rest of this function. If not, we can bail here. |
| return nullptr; |
| } |
| } else if (enclosingBlock(upstreamEnd.deprecatedNode()) != upstreamStart.deprecatedNode()) { |
| // The visibleEnd. If it is an ancestor of the paragraph start, then |
| // we can bail as we have a full block to work with. |
| if (upstreamStart.deprecatedNode()->isDescendantOf(enclosingBlock(upstreamEnd.deprecatedNode()))) |
| return nullptr; |
| } else if (isEndOfEditableOrNonEditableContent(visibleEnd)) { |
| // At the end of the editable region. We can bail here as well. |
| return nullptr; |
| } |
| } |
| |
| // If upstreamStart is not editable, then we can bail here. |
| if (!isEditablePosition(upstreamStart)) |
| return nullptr; |
| auto newBlock = insertNewDefaultParagraphElementAt(upstreamStart); |
| |
| bool endWasBr = visibleParagraphEnd.deepEquivalent().deprecatedNode()->hasTagName(brTag); |
| |
| moveParagraphs(visibleParagraphStart, visibleParagraphEnd, VisiblePosition(firstPositionInNode(newBlock.ptr()))); |
| |
| if (newBlock->lastChild() && newBlock->lastChild()->hasTagName(brTag) && !endWasBr) |
| removeNode(*newBlock->lastChild()); |
| |
| return newBlock; |
| } |
| |
| void CompositeEditCommand::pushAnchorElementDown(Element& anchorElement) |
| { |
| ASSERT(anchorElement.isLink()); |
| |
| setEndingSelection(VisibleSelection::selectionFromContentsOfNode(&anchorElement)); |
| applyStyledElement(anchorElement); |
| // Clones of anchorElement have been pushed down, now remove it. |
| if (anchorElement.isConnected()) |
| removeNodePreservingChildren(anchorElement); |
| } |
| |
| // Clone the paragraph between start and end under blockElement, |
| // preserving the hierarchy up to outerNode. |
| |
| void CompositeEditCommand::cloneParagraphUnderNewElement(const Position& start, const Position& end, Node* passedOuterNode, Element* blockElement) |
| { |
| ASSERT(comparePositions(start, end) <= 0); |
| |
| // First we clone the outerNode |
| RefPtr<Node> lastNode; |
| RefPtr<Node> outerNode = passedOuterNode; |
| |
| if (outerNode->isRootEditableElement()) { |
| lastNode = blockElement; |
| } else { |
| lastNode = outerNode->cloneNode(isRenderedTable(outerNode.get())); |
| appendNode(*lastNode, *blockElement); |
| } |
| |
| if (start.deprecatedNode() != outerNode && lastNode->isElementNode() && start.anchorNode()->isDescendantOf(outerNode.get())) { |
| Vector<RefPtr<Node>> ancestors; |
| |
| // Insert each node from innerNode to outerNode (excluded) in a list. |
| for (Node* n = start.deprecatedNode(); n && n != outerNode; n = n->parentNode()) |
| ancestors.append(n); |
| |
| // Clone every node between start.deprecatedNode() and outerBlock. |
| |
| for (size_t i = ancestors.size(); i != 0; --i) { |
| Node* item = ancestors[i - 1].get(); |
| auto child = item->cloneNode(isRenderedTable(item)); |
| appendNode(child.copyRef(), downcast<Element>(*lastNode)); |
| lastNode = WTFMove(child); |
| } |
| } |
| |
| // Handle the case of paragraphs with more than one node, |
| // cloning all the siblings until end.deprecatedNode() is reached. |
| |
| if (start.deprecatedNode() != end.deprecatedNode() && !start.deprecatedNode()->isDescendantOf(end.deprecatedNode())) { |
| // If end is not a descendant of outerNode we need to |
| // find the first common ancestor to increase the scope |
| // of our nextSibling traversal. |
| while (!end.deprecatedNode()->isDescendantOf(outerNode.get())) { |
| outerNode = outerNode->parentNode(); |
| } |
| |
| RefPtr<Node> startNode = start.deprecatedNode(); |
| for (RefPtr<Node> node = NodeTraversal::nextSkippingChildren(*startNode, outerNode.get()); node; node = NodeTraversal::nextSkippingChildren(*node, outerNode.get())) { |
| // Move lastNode up in the tree as much as node was moved up in the |
| // tree by NodeTraversal::nextSkippingChildren, so that the relative depth between |
| // node and the original start node is maintained in the clone. |
| while (startNode->parentNode() != node->parentNode()) { |
| startNode = startNode->parentNode(); |
| lastNode = lastNode->parentNode(); |
| } |
| |
| auto clonedNode = node->cloneNode(true); |
| insertNodeAfter(clonedNode.copyRef(), *lastNode); |
| lastNode = WTFMove(clonedNode); |
| if (node == end.deprecatedNode() || end.deprecatedNode()->isDescendantOf(*node)) |
| break; |
| } |
| } |
| } |
| |
| |
| // There are bugs in deletion when it removes a fully selected table/list. |
| // It expands and removes the entire table/list, but will let content |
| // before and after the table/list collapse onto one line. |
| // Deleting a paragraph will leave a placeholder. Remove it (and prune |
| // empty or unrendered parents). |
| |
| void CompositeEditCommand::cleanupAfterDeletion(VisiblePosition destination) |
| { |
| VisiblePosition caretAfterDelete = endingSelection().visibleStart(); |
| if (!caretAfterDelete.equals(destination) && isStartOfParagraph(caretAfterDelete) && isEndOfParagraph(caretAfterDelete)) { |
| // Note: We want the rightmost candidate. |
| Position position = caretAfterDelete.deepEquivalent().downstream(); |
| Node* node = position.deprecatedNode(); |
| ASSERT(node); |
| // Normally deletion will leave a br as a placeholder. |
| if (is<HTMLBRElement>(*node)) |
| removeNodeAndPruneAncestors(*node); |
| // If the selection to move was empty and in an empty block that |
| // doesn't require a placeholder to prop itself open (like a bordered |
| // div or an li), remove it during the move (the list removal code |
| // expects this behavior). |
| else if (isBlock(node)) { |
| // If caret position after deletion and destination position coincides, |
| // node should not be removed. |
| if (!position.rendersInDifferentPosition(destination.deepEquivalent())) { |
| prune(node); |
| return; |
| } |
| removeNodeAndPruneAncestors(*node); |
| } |
| else if (lineBreakExistsAtPosition(position)) { |
| // There is a preserved '\n' at caretAfterDelete. |
| // We can safely assume this is a text node. |
| Text& textNode = downcast<Text>(*node); |
| if (textNode.length() == 1) |
| removeNodeAndPruneAncestors(textNode); |
| else |
| deleteTextFromNode(textNode, position.deprecatedEditingOffset(), 1); |
| } |
| } |
| } |
| |
| // This is a version of moveParagraph that preserves style by keeping the original markup |
| // It is currently used only by IndentOutdentCommand but it is meant to be used in the |
| // future by several other commands such as InsertList and the align commands. |
| // The blockElement parameter is the element to move the paragraph to, |
| // outerNode is the top element of the paragraph hierarchy. |
| |
| void CompositeEditCommand::moveParagraphWithClones(const VisiblePosition& startOfParagraphToMove, const VisiblePosition& endOfParagraphToMove, Element* blockElement, Node* outerNode) |
| { |
| if (startOfParagraphToMove.isNull() || endOfParagraphToMove.isNull()) |
| return; |
| |
| ASSERT(outerNode); |
| ASSERT(blockElement); |
| |
| VisiblePosition beforeParagraph = startOfParagraphToMove.previous(); |
| VisiblePosition afterParagraph(endOfParagraphToMove.next()); |
| |
| // We upstream() the end and downstream() the start so that we don't include collapsed whitespace in the move. |
| // When we paste a fragment, spaces after the end and before the start are treated as though they were rendered. |
| Position start = startOfParagraphToMove.deepEquivalent().downstream(); |
| Position end = startOfParagraphToMove == endOfParagraphToMove ? start : endOfParagraphToMove.deepEquivalent().upstream(); |
| |
| cloneParagraphUnderNewElement(start, end, outerNode, blockElement); |
| |
| setEndingSelection(VisibleSelection(start, end, DOWNSTREAM)); |
| deleteSelection(false, false, false, false); |
| |
| // There are bugs in deletion when it removes a fully selected table/list. |
| // It expands and removes the entire table/list, but will let content |
| // before and after the table/list collapse onto one line. |
| |
| cleanupAfterDeletion(); |
| |
| // Add a br if pruning an empty block level element caused a collapse. For example: |
| // foo^ |
| // <div>bar</div> |
| // baz |
| // Imagine moving 'bar' to ^. 'bar' will be deleted and its div pruned. That would |
| // cause 'baz' to collapse onto the line with 'foobar' unless we insert a br. |
| // Must recononicalize these two VisiblePositions after the pruning above. |
| beforeParagraph = VisiblePosition(beforeParagraph.deepEquivalent()); |
| afterParagraph = VisiblePosition(afterParagraph.deepEquivalent()); |
| |
| if (beforeParagraph.isNotNull() && !isRenderedTable(beforeParagraph.deepEquivalent().deprecatedNode()) |
| && ((!isEndOfParagraph(beforeParagraph) && !isStartOfParagraph(beforeParagraph)) || beforeParagraph == afterParagraph) |
| && isEditablePosition(beforeParagraph.deepEquivalent())) { |
| // FIXME: Trim text between beforeParagraph and afterParagraph if they aren't equal. |
| insertNodeAt(HTMLBRElement::create(document()), beforeParagraph.deepEquivalent()); |
| } |
| } |
| |
| |
| // This moves a paragraph preserving its style. |
| void CompositeEditCommand::moveParagraph(const VisiblePosition& startOfParagraphToMove, const VisiblePosition& endOfParagraphToMove, const VisiblePosition& destination, bool preserveSelection, bool preserveStyle) |
| { |
| ASSERT(isStartOfParagraph(startOfParagraphToMove)); |
| ASSERT(isEndOfParagraph(endOfParagraphToMove)); |
| moveParagraphs(startOfParagraphToMove, endOfParagraphToMove, destination, preserveSelection, preserveStyle); |
| } |
| |
| void CompositeEditCommand::moveParagraphs(const VisiblePosition& startOfParagraphToMove, const VisiblePosition& endOfParagraphToMove, const VisiblePosition& destination, bool preserveSelection, bool preserveStyle) |
| { |
| if (startOfParagraphToMove == destination) |
| return; |
| |
| int startIndex = -1; |
| int endIndex = -1; |
| int destinationIndex = -1; |
| bool originalIsDirectional = endingSelection().isDirectional(); |
| if (preserveSelection && !endingSelection().isNone()) { |
| VisiblePosition visibleStart = endingSelection().visibleStart(); |
| VisiblePosition visibleEnd = endingSelection().visibleEnd(); |
| |
| bool startAfterParagraph = comparePositions(visibleStart, endOfParagraphToMove) > 0; |
| bool endBeforeParagraph = comparePositions(visibleEnd, startOfParagraphToMove) < 0; |
| |
| if (!startAfterParagraph && !endBeforeParagraph) { |
| bool startInParagraph = comparePositions(visibleStart, startOfParagraphToMove) >= 0; |
| bool endInParagraph = comparePositions(visibleEnd, endOfParagraphToMove) <= 0; |
| |
| startIndex = 0; |
| if (startInParagraph) { |
| auto startRange = Range::create(document(), startOfParagraphToMove.deepEquivalent().parentAnchoredEquivalent(), visibleStart.deepEquivalent().parentAnchoredEquivalent()); |
| startIndex = TextIterator::rangeLength(startRange.ptr(), true); |
| } |
| |
| endIndex = 0; |
| if (endInParagraph) { |
| auto endRange = Range::create(document(), startOfParagraphToMove.deepEquivalent().parentAnchoredEquivalent(), visibleEnd.deepEquivalent().parentAnchoredEquivalent()); |
| endIndex = TextIterator::rangeLength(endRange.ptr(), true); |
| } |
| } |
| } |
| |
| VisiblePosition beforeParagraph = startOfParagraphToMove.previous(CannotCrossEditingBoundary); |
| VisiblePosition afterParagraph(endOfParagraphToMove.next(CannotCrossEditingBoundary)); |
| |
| // We upstream() the end and downstream() the start so that we don't include collapsed whitespace in the move. |
| // When we paste a fragment, spaces after the end and before the start are treated as though they were rendered. |
| Position start = startOfParagraphToMove.deepEquivalent().downstream(); |
| Position end = endOfParagraphToMove.deepEquivalent().upstream(); |
| |
| // start and end can't be used directly to create a Range; they are "editing positions" |
| Position startRangeCompliant = start.parentAnchoredEquivalent(); |
| Position endRangeCompliant = end.parentAnchoredEquivalent(); |
| auto range = Range::create(document(), startRangeCompliant.deprecatedNode(), startRangeCompliant.deprecatedEditingOffset(), endRangeCompliant.deprecatedNode(), endRangeCompliant.deprecatedEditingOffset()); |
| |
| // FIXME: This is an inefficient way to preserve style on nodes in the paragraph to move. It |
| // shouldn't matter though, since moved paragraphs will usually be quite small. |
| RefPtr<DocumentFragment> fragment; |
| // This used to use a ternary for initialization, but that confused some versions of GCC, see bug 37912 |
| if (startOfParagraphToMove != endOfParagraphToMove) |
| fragment = createFragmentFromMarkup(document(), serializePreservingVisualAppearance(range.get(), nullptr, AnnotateForInterchange::No, ConvertBlocksToInlines::Yes), emptyString()); |
| |
| // A non-empty paragraph's style is moved when we copy and move it. We don't move |
| // anything if we're given an empty paragraph, but an empty paragraph can have style |
| // too, <div><b><br></b></div> for example. Save it so that we can preserve it later. |
| RefPtr<EditingStyle> styleInEmptyParagraph; |
| #if !PLATFORM(IOS_FAMILY) |
| if (startOfParagraphToMove == endOfParagraphToMove && preserveStyle) { |
| #else |
| if (startOfParagraphToMove == endOfParagraphToMove && preserveStyle && isRichlyEditablePosition(destination.deepEquivalent())) { |
| #endif |
| styleInEmptyParagraph = EditingStyle::create(startOfParagraphToMove.deepEquivalent()); |
| styleInEmptyParagraph->mergeTypingStyle(document()); |
| // The moved paragraph should assume the block style of the destination. |
| styleInEmptyParagraph->removeBlockProperties(); |
| } |
| |
| // FIXME (5098931): We should add a new insert action "WebViewInsertActionMoved" and call shouldInsertFragment here. |
| |
| setEndingSelection(VisibleSelection(start, end, DOWNSTREAM)); |
| frame().editor().clearMisspellingsAndBadGrammar(endingSelection()); |
| deleteSelection(false, false, false, false); |
| |
| ASSERT(destination.deepEquivalent().anchorNode()->isConnected()); |
| cleanupAfterDeletion(destination); |
| ASSERT(destination.deepEquivalent().anchorNode()->isConnected()); |
| |
| // Add a br if pruning an empty block level element caused a collapse. For example: |
| // foo^ |
| // <div>bar</div> |
| // baz |
| // Imagine moving 'bar' to ^. 'bar' will be deleted and its div pruned. That would |
| // cause 'baz' to collapse onto the line with 'foobar' unless we insert a br. |
| // Must recononicalize these two VisiblePositions after the pruning above. |
| beforeParagraph = VisiblePosition(beforeParagraph.deepEquivalent()); |
| afterParagraph = VisiblePosition(afterParagraph.deepEquivalent()); |
| if (beforeParagraph.isNotNull() && ((!isStartOfParagraph(beforeParagraph) && !isEndOfParagraph(beforeParagraph)) || beforeParagraph == afterParagraph)) { |
| // FIXME: Trim text between beforeParagraph and afterParagraph if they aren't equal. |
| insertNodeAt(HTMLBRElement::create(document()), beforeParagraph.deepEquivalent()); |
| // Need an updateLayout here in case inserting the br has split a text node. |
| document().updateLayoutIgnorePendingStylesheets(); |
| } |
| |
| RefPtr<ContainerNode> editableRoot = destination.rootEditableElement(); |
| if (!editableRoot) |
| editableRoot = &document(); |
| |
| auto startToDestinationRange = Range::create(document(), firstPositionInNode(editableRoot.get()), destination.deepEquivalent().parentAnchoredEquivalent()); |
| destinationIndex = TextIterator::rangeLength(startToDestinationRange.ptr(), true); |
| |
| setEndingSelection(VisibleSelection(destination, originalIsDirectional)); |
| ASSERT(endingSelection().isCaretOrRange()); |
| OptionSet<ReplaceSelectionCommand::CommandOption> options { ReplaceSelectionCommand::SelectReplacement, ReplaceSelectionCommand::MovingParagraph }; |
| if (!preserveStyle) |
| options.add(ReplaceSelectionCommand::MatchStyle); |
| applyCommandToComposite(ReplaceSelectionCommand::create(document(), WTFMove(fragment), options)); |
| |
| frame().editor().markMisspellingsAndBadGrammar(endingSelection()); |
| |
| // If the selection is in an empty paragraph, restore styles from the old empty paragraph to the new empty paragraph. |
| bool selectionIsEmptyParagraph = endingSelection().isCaret() && isStartOfParagraph(endingSelection().visibleStart()) && isEndOfParagraph(endingSelection().visibleStart()); |
| if (styleInEmptyParagraph && selectionIsEmptyParagraph) |
| applyStyle(styleInEmptyParagraph.get()); |
| |
| if (preserveSelection && startIndex != -1) { |
| // Fragment creation (using createMarkup) incorrectly uses regular |
| // spaces instead of nbsps for some spaces that were rendered (11475), which |
| // causes spaces to be collapsed during the move operation. This results |
| // in a call to rangeFromLocationAndLength with a location past the end |
| // of the document (which will return null). |
| RefPtr<Range> start = TextIterator::rangeFromLocationAndLength(editableRoot.get(), destinationIndex + startIndex, 0, true); |
| RefPtr<Range> end = TextIterator::rangeFromLocationAndLength(editableRoot.get(), destinationIndex + endIndex, 0, true); |
| if (start && end) |
| setEndingSelection(VisibleSelection(start->startPosition(), end->startPosition(), DOWNSTREAM, originalIsDirectional)); |
| } |
| } |
| |
| Optional<VisibleSelection> CompositeEditCommand::shouldBreakOutOfEmptyListItem() const |
| { |
| auto emptyListItem = enclosingEmptyListItem(endingSelection().visibleStart()); |
| if (!emptyListItem) |
| return WTF::nullopt; |
| |
| auto listNode = emptyListItem->parentNode(); |
| // FIXME: Can't we do something better when the immediate parent wasn't a list node? |
| if (!listNode |
| || (!listNode->hasTagName(ulTag) && !listNode->hasTagName(olTag)) |
| || !listNode->hasEditableStyle() |
| || listNode == emptyListItem->rootEditableElement()) |
| return WTF::nullopt; |
| |
| return VisibleSelection(endingSelection().start().previous(BackwardDeletion), endingSelection().end()); |
| } |
| |
| // FIXME: Send an appropriate shouldDeleteRange call. |
| bool CompositeEditCommand::breakOutOfEmptyListItem() |
| { |
| if (!shouldBreakOutOfEmptyListItem()) |
| return false; |
| |
| auto emptyListItem = enclosingEmptyListItem(endingSelection().visibleStart()); |
| auto listNode = emptyListItem->parentNode(); |
| auto style = EditingStyle::create(endingSelection().start()); |
| style->mergeTypingStyle(document()); |
| |
| RefPtr<Element> newBlock; |
| if (ContainerNode* blockEnclosingList = listNode->parentNode()) { |
| if (is<HTMLLIElement>(*blockEnclosingList)) { // listNode is inside another list item |
| if (visiblePositionAfterNode(*blockEnclosingList) == visiblePositionAfterNode(*listNode)) { |
| // If listNode appears at the end of the outer list item, then move listNode outside of this list item |
| // e.g. <ul><li>hello <ul><li><br></li></ul> </li></ul> should become <ul><li>hello</li> <ul><li><br></li></ul> </ul> after this section |
| // If listNode does NOT appear at the end, then we should consider it as a regular paragraph. |
| // e.g. <ul><li> <ul><li><br></li></ul> hello</li></ul> should become <ul><li> <div><br></div> hello</li></ul> at the end |
| splitElement(downcast<HTMLLIElement>(*blockEnclosingList), *listNode); |
| removeNodePreservingChildren(*listNode->parentNode()); |
| newBlock = HTMLLIElement::create(document()); |
| } |
| // If listNode does NOT appear at the end of the outer list item, then behave as if in a regular paragraph. |
| } else if (blockEnclosingList->hasTagName(olTag) || blockEnclosingList->hasTagName(ulTag)) |
| newBlock = HTMLLIElement::create(document()); |
| } |
| if (!newBlock) |
| newBlock = createDefaultParagraphElement(document()); |
| |
| RefPtr<Node> previousListNode = emptyListItem->isElementNode() ? ElementTraversal::previousSibling(*emptyListItem): emptyListItem->previousSibling(); |
| RefPtr<Node> nextListNode = emptyListItem->isElementNode() ? ElementTraversal::nextSibling(*emptyListItem): emptyListItem->nextSibling(); |
| if (isListItem(nextListNode.get()) || isListHTMLElement(nextListNode.get())) { |
| // If emptyListItem follows another list item or nested list, split the list node. |
| if (isListItem(previousListNode.get()) || isListHTMLElement(previousListNode.get())) |
| splitElement(downcast<Element>(*listNode), *emptyListItem); |
| |
| // If emptyListItem is followed by other list item or nested list, then insert newBlock before the list node. |
| // Because we have splitted the element, emptyListItem is the first element in the list node. |
| // i.e. insert newBlock before ul or ol whose first element is emptyListItem |
| insertNodeBefore(*newBlock, *listNode); |
| removeNode(*emptyListItem); |
| } else { |
| // When emptyListItem does not follow any list item or nested list, insert newBlock after the enclosing list node. |
| // Remove the enclosing node if emptyListItem is the only child; otherwise just remove emptyListItem. |
| insertNodeAfter(*newBlock, *listNode); |
| removeNode(isListItem(previousListNode.get()) || isListHTMLElement(previousListNode.get()) ? *emptyListItem : *listNode); |
| } |
| |
| appendBlockPlaceholder(*newBlock); |
| setEndingSelection(VisibleSelection(firstPositionInNode(newBlock.get()), DOWNSTREAM, endingSelection().isDirectional())); |
| |
| style->prepareToApplyAt(endingSelection().start()); |
| if (!style->isEmpty()) |
| applyStyle(style.ptr()); |
| |
| return true; |
| } |
| |
| // If the caret is in an empty quoted paragraph, and either there is nothing before that |
| // paragraph, or what is before is unquoted, and the user presses delete, unquote that paragraph. |
| bool CompositeEditCommand::breakOutOfEmptyMailBlockquotedParagraph() |
| { |
| if (!endingSelection().isCaret()) |
| return false; |
| |
| VisiblePosition caret(endingSelection().visibleStart()); |
| Node* highestBlockquote = highestEnclosingNodeOfType(caret.deepEquivalent(), &isMailBlockquote); |
| if (!highestBlockquote) |
| return false; |
| |
| if (!isStartOfParagraph(caret) || !isEndOfParagraph(caret)) |
| return false; |
| |
| VisiblePosition previous(caret.previous(CannotCrossEditingBoundary)); |
| // Only move forward if there's nothing before the caret, or if there's unquoted content before it. |
| if (enclosingNodeOfType(previous.deepEquivalent(), &isMailBlockquote)) |
| return false; |
| |
| auto br = HTMLBRElement::create(document()); |
| auto* brPtr = br.ptr(); |
| // We want to replace this quoted paragraph with an unquoted one, so insert a br |
| // to hold the caret before the highest blockquote. |
| insertNodeBefore(WTFMove(br), *highestBlockquote); |
| VisiblePosition atBR(positionBeforeNode(brPtr)); |
| // If the br we inserted collapsed, for example foo<br><blockquote>...</blockquote>, insert |
| // a second one. |
| if (!isStartOfParagraph(atBR)) |
| insertNodeBefore(HTMLBRElement::create(document()), *brPtr); |
| setEndingSelection(VisibleSelection(atBR, endingSelection().isDirectional())); |
| |
| // If this is an empty paragraph there must be a line break here. |
| if (!lineBreakExistsAtVisiblePosition(caret)) |
| return false; |
| |
| Position caretPos(caret.deepEquivalent().downstream()); |
| // A line break is either a br or a preserved newline. |
| ASSERT(caretPos.deprecatedNode()->hasTagName(brTag) || (caretPos.deprecatedNode()->isTextNode() && caretPos.deprecatedNode()->renderer()->style().preserveNewline())); |
| |
| if (caretPos.deprecatedNode()->hasTagName(brTag)) |
| removeNodeAndPruneAncestors(*caretPos.deprecatedNode()); |
| else if (is<Text>(*caretPos.deprecatedNode())) { |
| ASSERT(caretPos.deprecatedEditingOffset() == 0); |
| Text& textNode = downcast<Text>(*caretPos.deprecatedNode()); |
| ContainerNode* parentNode = textNode.parentNode(); |
| // The preserved newline must be the first thing in the node, since otherwise the previous |
| // paragraph would be quoted, and we verified that it wasn't above. |
| deleteTextFromNode(textNode, 0, 1); |
| prune(parentNode); |
| } |
| |
| return true; |
| } |
| |
| // Operations use this function to avoid inserting content into an anchor when at the start or the end of |
| // that anchor, as in NSTextView. |
| // FIXME: This is only an approximation of NSTextViews insertion behavior, which varies depending on how |
| // the caret was made. |
| Position CompositeEditCommand::positionAvoidingSpecialElementBoundary(const Position& original) |
| { |
| if (original.isNull()) |
| return original; |
| |
| VisiblePosition visiblePos(original); |
| Element* enclosingAnchor = enclosingAnchorElement(original); |
| Position result = original; |
| |
| if (!enclosingAnchor) |
| return result; |
| |
| // Don't avoid block level anchors, because that would insert content into the wrong paragraph. |
| if (enclosingAnchor && !isBlock(enclosingAnchor)) { |
| VisiblePosition firstInAnchor(firstPositionInNode(enclosingAnchor)); |
| VisiblePosition lastInAnchor(lastPositionInNode(enclosingAnchor)); |
| // If visually just after the anchor, insert *inside* the anchor unless it's the last |
| // VisiblePosition in the document, to match NSTextView. |
| if (visiblePos == lastInAnchor) { |
| // Make sure anchors are pushed down before avoiding them so that we don't |
| // also avoid structural elements like lists and blocks (5142012). |
| if (original.deprecatedNode() != enclosingAnchor && original.deprecatedNode()->parentNode() != enclosingAnchor) { |
| pushAnchorElementDown(*enclosingAnchor); |
| enclosingAnchor = enclosingAnchorElement(original); |
| if (!enclosingAnchor) |
| return original; |
| } |
| // Don't insert outside an anchor if doing so would skip over a line break. It would |
| // probably be safe to move the line break so that we could still avoid the anchor here. |
| Position downstream(visiblePos.deepEquivalent().downstream()); |
| if (lineBreakExistsAtVisiblePosition(visiblePos) && downstream.deprecatedNode()->isDescendantOf(enclosingAnchor)) |
| return original; |
| |
| result = positionInParentAfterNode(enclosingAnchor); |
| } |
| // If visually just before an anchor, insert *outside* the anchor unless it's the first |
| // VisiblePosition in a paragraph, to match NSTextView. |
| if (visiblePos == firstInAnchor) { |
| // Make sure anchors are pushed down before avoiding them so that we don't |
| // also avoid structural elements like lists and blocks (5142012). |
| if (original.deprecatedNode() != enclosingAnchor && original.deprecatedNode()->parentNode() != enclosingAnchor) { |
| pushAnchorElementDown(*enclosingAnchor); |
| enclosingAnchor = enclosingAnchorElement(original); |
| } |
| if (!enclosingAnchor) |
| return original; |
| |
| result = positionInParentBeforeNode(enclosingAnchor); |
| } |
| } |
| |
| if (result.isNull() || !editableRootForPosition(result)) |
| result = original; |
| |
| return result; |
| } |
| |
| // Splits the tree parent by parent until we reach the specified ancestor. We use VisiblePositions |
| // to determine if the split is necessary. Returns the last split node. |
| RefPtr<Node> CompositeEditCommand::splitTreeToNode(Node& start, Node& end, bool shouldSplitAncestor) |
| { |
| ASSERT(&start != &end); |
| |
| RefPtr<Node> adjustedEnd = &end; |
| if (shouldSplitAncestor && adjustedEnd->parentNode()) |
| adjustedEnd = adjustedEnd->parentNode(); |
| |
| ASSERT(adjustedEnd); |
| RefPtr<Node> node; |
| for (node = &start; node && node->parentNode() != adjustedEnd; node = node->parentNode()) { |
| if (!is<Element>(*node->parentNode())) |
| break; |
| // Do not split a node when doing so introduces an empty node. |
| VisiblePosition positionInParent = firstPositionInNode(node->parentNode()); |
| VisiblePosition positionInNode = firstPositionInOrBeforeNode(node.get()); |
| if (positionInParent != positionInNode) |
| splitElement(downcast<Element>(*node->parentNode()), *node); |
| } |
| |
| return node; |
| } |
| |
| Ref<Element> createBlockPlaceholderElement(Document& document) |
| { |
| return HTMLBRElement::create(document); |
| } |
| |
| } // namespace WebCore |
