167 lines
6.1 KiB
C++
167 lines
6.1 KiB
C++
/*
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* Copyright (C) 2006 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "FormatBlockCommand.h"
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#include "Document.h"
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#include "Editing.h"
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#include "Element.h"
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#include "HTMLElement.h"
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#include "HTMLNames.h"
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#include "VisibleUnits.h"
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#include <wtf/NeverDestroyed.h>
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#include <wtf/RobinHoodHashSet.h>
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namespace WebCore {
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using namespace HTMLNames;
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static Node* enclosingBlockToSplitTreeTo(Node* startNode);
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static bool isElementForFormatBlock(const QualifiedName& tagName);
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static inline bool isElementForFormatBlock(Node* node)
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{
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return is<Element>(*node) && isElementForFormatBlock(downcast<Element>(*node).tagQName());
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}
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FormatBlockCommand::FormatBlockCommand(Document& document, const QualifiedName& tagName)
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: ApplyBlockElementCommand(document, tagName)
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, m_didApply(false)
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{
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}
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void FormatBlockCommand::formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection)
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{
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if (!isElementForFormatBlock(tagName()))
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return;
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ApplyBlockElementCommand::formatSelection(startOfSelection, endOfSelection);
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m_didApply = true;
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}
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void FormatBlockCommand::formatRange(const Position& start, const Position& end, const Position& endOfSelection, RefPtr<Element>& blockNode)
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{
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Node* nodeToSplitTo = enclosingBlockToSplitTreeTo(start.deprecatedNode());
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ASSERT(nodeToSplitTo);
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RefPtr<Node> outerBlock = (start.deprecatedNode() == nodeToSplitTo) ? start.deprecatedNode() : splitTreeToNode(*start.deprecatedNode(), *nodeToSplitTo);
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RefPtr<Node> nodeAfterInsertionPosition = outerBlock;
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auto range = makeSimpleRange(start, endOfSelection);
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Element* refNode = enclosingBlockFlowElement(end);
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Element* root = editableRootForPosition(start);
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// Root is null for elements with contenteditable=false.
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if (!root || !refNode)
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return;
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if (isElementForFormatBlock(refNode->tagQName()) && start == startOfBlock(start)
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&& (end == endOfBlock(end) || (range && isNodeVisiblyContainedWithin(*refNode, *range)))
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&& refNode != root && !root->isDescendantOf(*refNode)) {
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// Already in a block element that only contains the current paragraph
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if (refNode->hasTagName(tagName()))
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return;
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nodeAfterInsertionPosition = refNode;
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}
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if (!blockNode) {
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// Create a new blockquote and insert it as a child of the root editable element. We accomplish
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// this by splitting all parents of the current paragraph up to that point.
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blockNode = createBlockElement();
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insertNodeBefore(*blockNode, *nodeAfterInsertionPosition);
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}
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Position lastParagraphInBlockNode = blockNode->lastChild() ? positionAfterNode(blockNode->lastChild()) : Position();
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bool wasEndOfParagraph = isEndOfParagraph(lastParagraphInBlockNode);
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moveParagraphWithClones(start, end, blockNode.get(), outerBlock.get());
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if (wasEndOfParagraph && lastParagraphInBlockNode.anchorNode()->isConnected()
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&& !isEndOfParagraph(lastParagraphInBlockNode) && !isStartOfParagraph(lastParagraphInBlockNode))
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insertBlockPlaceholder(lastParagraphInBlockNode);
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}
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Element* FormatBlockCommand::elementForFormatBlockCommand(const std::optional<SimpleRange>& range)
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{
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if (!range)
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return nullptr;
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auto commonAncestor = commonInclusiveAncestor<ComposedTree>(*range);
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while (commonAncestor && !isElementForFormatBlock(commonAncestor))
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commonAncestor = commonAncestor->parentNode();
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if (!is<Element>(commonAncestor))
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return nullptr;
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auto rootEditableElement = range->start.container->rootEditableElement();
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if (!rootEditableElement || commonAncestor->contains(rootEditableElement))
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return nullptr;
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return &downcast<Element>(*commonAncestor);
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}
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bool isElementForFormatBlock(const QualifiedName& tagName)
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{
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static const auto blockTags = makeNeverDestroyed(MemoryCompactLookupOnlyRobinHoodHashSet<QualifiedName> {
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addressTag,
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articleTag,
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asideTag,
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blockquoteTag,
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ddTag,
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divTag,
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dlTag,
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dtTag,
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footerTag,
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h1Tag,
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h2Tag,
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h3Tag,
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h4Tag,
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h5Tag,
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h6Tag,
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headerTag,
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hgroupTag,
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mainTag,
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navTag,
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pTag,
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preTag,
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sectionTag,
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});
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return blockTags.get().contains(tagName);
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}
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Node* enclosingBlockToSplitTreeTo(Node* startNode)
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{
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Node* lastBlock = startNode;
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for (Node* n = startNode; n; n = n->parentNode()) {
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if (!n->hasEditableStyle())
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return lastBlock;
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if (isTableCell(n) || n->hasTagName(bodyTag) || !n->parentNode() || !n->parentNode()->hasEditableStyle() || isElementForFormatBlock(n))
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return n;
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if (isBlock(n))
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lastBlock = n;
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if (isListHTMLElement(n))
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return n->parentNode()->hasEditableStyle() ? n->parentNode() : n;
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}
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return lastBlock;
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}
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}
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