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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "CharacterData.h"
#include "EventNames.h"
#include "ExceptionCode.h"
#include "InspectorInstrumentation.h"
#include "MutationEvent.h"
#include "RenderText.h"
#include "TextBreakIterator.h"
using namespace std;
namespace WebCore {
void CharacterData::setData(const String& data, ExceptionCode&)
{
StringImpl* dataImpl = data.impl() ? data.impl() : StringImpl::empty();
if (equal(m_data.get(), dataImpl))
return;
unsigned oldLength = length();
setDataAndUpdate(dataImpl, 0, oldLength, dataImpl->length());
document()->textRemoved(this, 0, oldLength);
}
String CharacterData::substringData(unsigned offset, unsigned count, ExceptionCode& ec)
{
checkCharDataOperation(offset, ec);
if (ec)
return String();
return m_data->substring(offset, count);
}
unsigned CharacterData::parserAppendData(const UChar* data, unsigned dataLength, unsigned lengthLimit)
{
unsigned oldLength = m_data->length();
unsigned end = min(dataLength, lengthLimit - oldLength);
// Check that we are not on an unbreakable boundary.
// Some text break iterator implementations work best if the passed buffer is as small as possible,
// see <https://bugs.webkit.org/show_bug.cgi?id=29092>.
// We need at least two characters look-ahead to account for UTF-16 surrogates.
if (end < dataLength) {
TextBreakIterator* it = characterBreakIterator(data, (end + 2 > dataLength) ? dataLength : end + 2);
if (!isTextBreak(it, end))
end = textBreakPreceding(it, end);
}
if (!end)
return 0;
String newStr = m_data;
newStr.append(data, end);
m_data = newStr.impl();
updateRenderer(oldLength, 0);
// We don't call dispatchModifiedEvent here because we don't want the
// parser to dispatch DOM mutation events.
if (parentNode())
parentNode()->childrenChanged();
return end;
}
void CharacterData::appendData(const String& data, ExceptionCode&)
{
String newStr = m_data;
newStr.append(data);
setDataAndUpdate(newStr.impl(), m_data->length(), 0, data.length());
// FIXME: Should we call textInserted here?
}
void CharacterData::insertData(unsigned offset, const String& data, ExceptionCode& ec)
{
checkCharDataOperation(offset, ec);
if (ec)
return;
String newStr = m_data;
newStr.insert(data, offset);
setDataAndUpdate(newStr.impl(), offset, 0, data.length());
document()->textInserted(this, offset, data.length());
}
void CharacterData::deleteData(unsigned offset, unsigned count, ExceptionCode& ec)
{
checkCharDataOperation(offset, ec);
if (ec)
return;
unsigned realCount;
if (offset + count > length())
realCount = length() - offset;
else
realCount = count;
String newStr = m_data;
newStr.remove(offset, realCount);
setDataAndUpdate(newStr.impl(), offset, count, 0);
document()->textRemoved(this, offset, realCount);
}
void CharacterData::replaceData(unsigned offset, unsigned count, const String& data, ExceptionCode& ec)
{
checkCharDataOperation(offset, ec);
if (ec)
return;
unsigned realCount;
if (offset + count > length())
realCount = length() - offset;
else
realCount = count;
String newStr = m_data;
newStr.remove(offset, realCount);
newStr.insert(data, offset);
setDataAndUpdate(newStr.impl(), offset, count, data.length());
// update the markers for spell checking and grammar checking
document()->textRemoved(this, offset, realCount);
document()->textInserted(this, offset, data.length());
}
String CharacterData::nodeValue() const
{
return m_data;
}
bool CharacterData::containsOnlyWhitespace() const
{
return !m_data || m_data->containsOnlyWhitespace();
}
void CharacterData::setNodeValue(const String& nodeValue, ExceptionCode& ec)
{
setData(nodeValue, ec);
}
void CharacterData::setDataAndUpdate(PassRefPtr<StringImpl> newData, unsigned offsetOfReplacedData, unsigned oldLength, unsigned newLength)
{
if (document()->frame())
document()->frame()->selection()->textWillBeReplaced(this, offsetOfReplacedData, oldLength, newLength);
RefPtr<StringImpl> oldData = m_data;
m_data = newData;
updateRenderer(offsetOfReplacedData, oldLength);
dispatchModifiedEvent(oldData.get());
}
void CharacterData::updateRenderer(unsigned offsetOfReplacedData, unsigned lengthOfReplacedData)
{
if ((!renderer() || !rendererIsNeeded(renderer()->style())) && attached()) {
detach();
attach();
} else if (renderer())
toRenderText(renderer())->setTextWithOffset(m_data, offsetOfReplacedData, lengthOfReplacedData);
}
void CharacterData::dispatchModifiedEvent(StringImpl* oldData)
{
if (parentNode())
parentNode()->childrenChanged();
if (document()->hasListenerType(Document::DOMCHARACTERDATAMODIFIED_LISTENER))
dispatchEvent(MutationEvent::create(eventNames().DOMCharacterDataModifiedEvent, true, 0, oldData, m_data));
dispatchSubtreeModifiedEvent();
#if ENABLE(INSPECTOR)
InspectorInstrumentation::characterDataModified(document(), this);
#endif
}
void CharacterData::checkCharDataOperation(unsigned offset, ExceptionCode& ec)
{
ec = 0;
// INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than the number of 16-bit
// units in data.
if (offset > length()) {
ec = INDEX_SIZE_ERR;
return;
}
}
int CharacterData::maxCharacterOffset() const
{
return static_cast<int>(length());
}
bool CharacterData::rendererIsNeeded(RenderStyle *style)
{
if (!m_data || !length())
return false;
return Node::rendererIsNeeded(style);
}
bool CharacterData::offsetInCharacters() const
{
return true;
}
} // namespace WebCore
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