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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 "htmlediting.h"
#include "HTMLElement.h"
#include "HTMLNames.h"
#include "visible_units.h"
namespace WebCore {
using namespace HTMLNames;
FormatBlockCommand::FormatBlockCommand(Document* document, const AtomicString& tagName)
: CompositeEditCommand(document), m_tagName(tagName)
{
}
bool FormatBlockCommand::modifyRange()
{
ASSERT(endingSelection().isRange());
VisiblePosition visibleStart = endingSelection().visibleStart();
VisiblePosition visibleEnd = endingSelection().visibleEnd();
VisiblePosition startOfLastParagraph = startOfParagraph(visibleEnd);
if (startOfParagraph(visibleStart) == startOfLastParagraph)
return false;
setEndingSelection(visibleStart);
doApply();
visibleStart = endingSelection().visibleStart();
VisiblePosition nextParagraph = endOfParagraph(visibleStart).next();
while (nextParagraph.isNotNull() && nextParagraph != startOfLastParagraph) {
setEndingSelection(nextParagraph);
doApply();
nextParagraph = endOfParagraph(endingSelection().visibleStart()).next();
}
setEndingSelection(visibleEnd);
doApply();
visibleEnd = endingSelection().visibleEnd();
setEndingSelection(VisibleSelection(visibleStart.deepEquivalent(), visibleEnd.deepEquivalent(), DOWNSTREAM));
return true;
}
void FormatBlockCommand::doApply()
{
if (!endingSelection().isNonOrphanedCaretOrRange())
return;
if (!endingSelection().rootEditableElement())
return;
VisiblePosition visibleEnd = endingSelection().visibleEnd();
VisiblePosition visibleStart = endingSelection().visibleStart();
// When a selection ends at the start of a paragraph, we rarely paint
// the selection gap before that paragraph, because there often is no gap.
// In a case like this, it's not obvious to the user that the selection
// ends "inside" that paragraph, so it would be confusing if FormatBlock
// operated on that paragraph.
// FIXME: We paint the gap before some paragraphs that are indented with left
// margin/padding, but not others. We should make the gap painting more consistent and
// then use a left margin/padding rule here.
if (visibleEnd != visibleStart && isStartOfParagraph(visibleEnd))
setEndingSelection(VisibleSelection(visibleStart, visibleEnd.previous(true)));
if (endingSelection().isRange() && modifyRange())
return;
ExceptionCode ec;
String localName, prefix;
if (!Document::parseQualifiedName(m_tagName, prefix, localName, ec))
return;
QualifiedName qTypeOfBlock(prefix, localName, xhtmlNamespaceURI);
Node* refNode = enclosingBlockFlowElement(endingSelection().visibleStart());
if (refNode->hasTagName(qTypeOfBlock))
// We're already in a block with the format we want, so we don't have to do anything
return;
VisiblePosition paragraphStart = startOfParagraph(endingSelection().visibleStart());
VisiblePosition paragraphEnd = endOfParagraph(endingSelection().visibleStart());
VisiblePosition blockStart = startOfBlock(endingSelection().visibleStart());
VisiblePosition blockEnd = endOfBlock(endingSelection().visibleStart());
RefPtr<Element> blockNode = createHTMLElement(document(), m_tagName);
RefPtr<Element> placeholder = createBreakElement(document());
Node* root = endingSelection().start().node()->rootEditableElement();
if (validBlockTag(refNode->nodeName().lower()) &&
paragraphStart == blockStart && paragraphEnd == blockEnd &&
refNode != root && !root->isDescendantOf(refNode))
// Already in a valid block tag that only contains the current paragraph, so we can swap with the new tag
insertNodeBefore(blockNode, refNode);
else {
// Avoid inserting inside inline elements that surround paragraphStart with upstream().
// This is only to avoid creating bloated markup.
insertNodeAt(blockNode, paragraphStart.deepEquivalent().upstream());
}
appendNode(placeholder, blockNode);
VisiblePosition destination(Position(placeholder.get(), 0));
if (paragraphStart == paragraphEnd && !lineBreakExistsAtVisiblePosition(paragraphStart)) {
setEndingSelection(destination);
return;
}
moveParagraph(paragraphStart, paragraphEnd, destination, true, false);
}
}
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