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/*
* Copyright (C) 2006 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 "FormatBlockCommand.h"
#include "Document.h"
#include "Editing.h"
#include "Element.h"
#include "HTMLElement.h"
#include "HTMLNames.h"
#include "Range.h"
#include "VisibleUnits.h"
#include <wtf/NeverDestroyed.h>
namespace WebCore {
using namespace HTMLNames;
static Node* enclosingBlockToSplitTreeTo(Node* startNode);
static bool isElementForFormatBlock(const QualifiedName& tagName);
static inline bool isElementForFormatBlock(Node* node)
{
return is<Element>(*node) && isElementForFormatBlock(downcast<Element>(*node).tagQName());
}
FormatBlockCommand::FormatBlockCommand(Document& document, const QualifiedName& tagName)
: ApplyBlockElementCommand(document, tagName)
, m_didApply(false)
{
}
void FormatBlockCommand::formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection)
{
if (!isElementForFormatBlock(tagName()))
return;
ApplyBlockElementCommand::formatSelection(startOfSelection, endOfSelection);
m_didApply = true;
}
void FormatBlockCommand::formatRange(const Position& start, const Position& end, const Position& endOfSelection, RefPtr<Element>& blockNode)
{
Node* nodeToSplitTo = enclosingBlockToSplitTreeTo(start.deprecatedNode());
ASSERT(nodeToSplitTo);
RefPtr<Node> outerBlock = (start.deprecatedNode() == nodeToSplitTo) ? start.deprecatedNode() : splitTreeToNode(*start.deprecatedNode(), *nodeToSplitTo);
RefPtr<Node> nodeAfterInsertionPosition = outerBlock;
auto range = Range::create(document(), start, endOfSelection);
Element* refNode = enclosingBlockFlowElement(end);
Element* root = editableRootForPosition(start);
// Root is null for elements with contenteditable=false.
if (!root || !refNode)
return;
if (isElementForFormatBlock(refNode->tagQName()) && start == startOfBlock(start)
&& (end == endOfBlock(end) || isNodeVisiblyContainedWithin(*refNode, range.get()))
&& refNode != root && !root->isDescendantOf(*refNode)) {
// Already in a block element that only contains the current paragraph
if (refNode->hasTagName(tagName()))
return;
nodeAfterInsertionPosition = refNode;
}
if (!blockNode) {
// Create a new blockquote and insert it as a child of the root editable element. We accomplish
// this by splitting all parents of the current paragraph up to that point.
blockNode = createBlockElement();
insertNodeBefore(*blockNode, *nodeAfterInsertionPosition);
}
Position lastParagraphInBlockNode = blockNode->lastChild() ? positionAfterNode(blockNode->lastChild()) : Position();
bool wasEndOfParagraph = isEndOfParagraph(lastParagraphInBlockNode);
moveParagraphWithClones(start, end, blockNode.get(), outerBlock.get());
if (wasEndOfParagraph && !isEndOfParagraph(lastParagraphInBlockNode) && !isStartOfParagraph(lastParagraphInBlockNode))
insertBlockPlaceholder(lastParagraphInBlockNode);
}
Element* FormatBlockCommand::elementForFormatBlockCommand(Range* range)
{
if (!range)
return nullptr;
Node* commonAncestor = range->commonAncestorContainer();
while (commonAncestor && !isElementForFormatBlock(commonAncestor))
commonAncestor = commonAncestor->parentNode();
if (!commonAncestor)
return nullptr;
Element* rootEditableElement = range->startContainer().rootEditableElement();
if (!rootEditableElement || commonAncestor->contains(rootEditableElement))
return nullptr;
return commonAncestor->isElementNode() ? downcast<Element>(commonAncestor) : nullptr;
}
bool isElementForFormatBlock(const QualifiedName& tagName)
{
static const auto blockTags = makeNeverDestroyed(HashSet<QualifiedName> {
addressTag,
articleTag,
asideTag,
blockquoteTag,
ddTag,
divTag,
dlTag,
dtTag,
footerTag,
h1Tag,
h2Tag,
h3Tag,
h4Tag,
h5Tag,
h6Tag,
headerTag,
hgroupTag,
mainTag,
navTag,
pTag,
preTag,
sectionTag,
});
return blockTags.get().contains(tagName);
}
Node* enclosingBlockToSplitTreeTo(Node* startNode)
{
Node* lastBlock = startNode;
for (Node* n = startNode; n; n = n->parentNode()) {
if (!n->hasEditableStyle())
return lastBlock;
if (isTableCell(n) || n->hasTagName(bodyTag) || !n->parentNode() || !n->parentNode()->hasEditableStyle() || isElementForFormatBlock(n))
return n;
if (isBlock(n))
lastBlock = n;
if (isListHTMLElement(n))
return n->parentNode()->hasEditableStyle() ? n->parentNode() : n;
}
return lastBlock;
}
}