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/*
* Copyright (C) 2006 Apple Computer, 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 COMPUTER, 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 COMPUTER, 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 "Element.h"
#include "FormatBlockCommand.h"
#include "Document.h"
#include "ExceptionCodePlaceholder.h"
#include "htmlediting.h"
#include "HTMLElement.h"
#include "HTMLNames.h"
#include "Range.h"
#include "VisibleUnits.h"
namespace WebCore {
using namespace HTMLNames;
static Node* enclosingBlockToSplitTreeTo(Node* startNode);
static bool isElementForFormatBlock(const QualifiedName& tagName);
static inline bool isElementForFormatBlock(Node* node)
{
return node->isElementNode() && isElementForFormatBlock(toElement(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());
RefPtr<Node> outerBlock = (start.deprecatedNode() == nodeToSplitTo) ? start.deprecatedNode() : splitTreeToNode(start.deprecatedNode(), nodeToSplitTo);
RefPtr<Node> nodeAfterInsertionPosition = outerBlock;
RefPtr<Range> 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 0;
Node* commonAncestor = range->commonAncestorContainer(IGNORE_EXCEPTION);
while (commonAncestor && !isElementForFormatBlock(commonAncestor))
commonAncestor = commonAncestor->parentNode();
if (!commonAncestor)
return 0;
Element* rootEditableElement = range->startContainer()->rootEditableElement();
if (!rootEditableElement || commonAncestor->contains(rootEditableElement))
return 0;
return commonAncestor->isElementNode() ? toElement(commonAncestor) : 0;
}
bool isElementForFormatBlock(const QualifiedName& tagName)
{
DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, blockTags, ());
if (blockTags.isEmpty()) {
blockTags.add(addressTag);
blockTags.add(articleTag);
blockTags.add(asideTag);
blockTags.add(blockquoteTag);
blockTags.add(ddTag);
blockTags.add(divTag);
blockTags.add(dlTag);
blockTags.add(dtTag);
blockTags.add(footerTag);
blockTags.add(h1Tag);
blockTags.add(h2Tag);
blockTags.add(h3Tag);
blockTags.add(h4Tag);
blockTags.add(h5Tag);
blockTags.add(h6Tag);
blockTags.add(headerTag);
blockTags.add(hgroupTag);
blockTags.add(mainTag);
blockTags.add(navTag);
blockTags.add(pTag);
blockTags.add(preTag);
blockTags.add(sectionTag);
}
return blockTags.contains(tagName);
}
Node* enclosingBlockToSplitTreeTo(Node* startNode)
{
Node* lastBlock = startNode;
for (Node* n = startNode; n; n = n->parentNode()) {
if (!n->rendererIsEditable())
return lastBlock;
if (isTableCell(n) || n->hasTagName(bodyTag) || !n->parentNode() || !n->parentNode()->rendererIsEditable() || isElementForFormatBlock(n))
return n;
if (isBlock(n))
lastBlock = n;
if (isListElement(n))
return n->parentNode()->rendererIsEditable() ? n->parentNode() : n;
}
return lastBlock;
}
}
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