#include "config.h"
#include "CharacterData.h"
#include "Document.h"
#include "EventNames.h"
#include "ExceptionCode.h"
#include "InspectorInstrumentation.h"
#include "MutationEvent.h"
#include "MutationObserverInterestGroup.h"
#include "MutationRecord.h"
#include "NodeRenderingContext.h"
#include "RenderText.h"
#include "TextBreakIterator.h"
#include "WebKitMutationObserver.h"
using namespace std;
namespace WebCore {
void CharacterData::setData(const String& data, ExceptionCode&)
{
const String& nonNullData = !data.isNull() ? data : emptyString();
if (m_data == nonNullData)
return;
RefPtr<CharacterData> protect = this;
unsigned oldLength = length();
setDataAndUpdate(nonNullData, 0, oldLength, nonNullData.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);
if (end < dataLength) {
NonSharedCharacterBreakIterator it(data, (end + 2 > dataLength) ? dataLength : end + 2);
if (!isTextBreak(it, end))
end = textBreakPreceding(it, end);
}
if (!end)
return 0;
m_data.append(data, end);
updateRenderer(oldLength, 0);
document()->incDOMTreeVersion();
if (parentNode())
parentNode()->childrenChanged();
return end;
}
void CharacterData::appendData(const String& data, ExceptionCode&)
{
String newStr = m_data;
newStr.append(data);
setDataAndUpdate(newStr, m_data.length(), 0, data.length());
}
void CharacterData::insertData(unsigned offset, const String& data, ExceptionCode& ec, bool canShowLastCharacterIfSecure)
{
checkCharDataOperation(offset, ec);
if (ec)
return;
bool atEnd = (offset == m_data.length());
RenderText* renderText = toRenderText(renderer());
ASSERT(!renderer() || renderText);
LastCharacterBehavior behavior = atEnd && renderer() && renderText->isSecure() && canShowLastCharacterIfSecure ? RevealLastCharacterBehavior : DefaultLastCharacterBehavior;
String newStr = m_data;
newStr.insert(data, offset);
setDataAndUpdate(newStr, offset, 0, data.length(), behavior);
document()->textInserted(this, offset, data.length());
}
void CharacterData::deleteData(unsigned offset, unsigned count, ExceptionCode& ec)
{
checkCharDataOperation(offset, ec);
if (ec)
return;
bool atEnd = (offset + count == m_data.length());
RenderText* renderText = toRenderText(renderer());
ASSERT(!renderer() || renderText);
LastCharacterBehavior behavior = atEnd && renderer() && renderText->isSecure() ? SecureLastCharacterBehavior : DefaultLastCharacterBehavior;
unsigned realCount;
if (offset + count > length())
realCount = length() - offset;
else
realCount = count;
String newStr = m_data;
newStr.remove(offset, realCount);
setDataAndUpdate(newStr, offset, count, 0, behavior);
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, offset, count, data.length());
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.containsOnlyWhitespace();
}
void CharacterData::setNodeValue(const String& nodeValue, ExceptionCode& ec)
{
setData(nodeValue, ec);
}
void CharacterData::setDataAndUpdate(const String& newData, unsigned offsetOfReplacedData, unsigned oldLength, unsigned newLength, LastCharacterBehavior behavior)
{
if (document()->frame())
document()->frame()->selection()->textWillBeReplaced(this, offsetOfReplacedData, oldLength, newLength);
String oldData = m_data;
m_data = newData;
updateRenderer(offsetOfReplacedData, oldLength, behavior);
document()->incDOMTreeVersion();
dispatchModifiedEvent(oldData);
}
void CharacterData::updateRenderer(unsigned offsetOfReplacedData, unsigned lengthOfReplacedData, LastCharacterBehavior behavior)
{
if ((!renderer() || !rendererIsNeeded(NodeRenderingContext(this, renderer()->style()))) && attached())
reattach();
else if (renderer()) {
RenderText *renderText = toRenderText(renderer());
switch (behavior) {
case RevealLastCharacterBehavior:
renderText->momentarilyRevealLastCharacter();
break;
case SecureLastCharacterBehavior:
renderText->secureLastCharacter();
break;
case DefaultLastCharacterBehavior:
break;
}
renderText->setTextWithOffset(m_data.impl(), offsetOfReplacedData, lengthOfReplacedData);
}
}
void CharacterData::dispatchModifiedEvent(const String& oldData)
{
#if ENABLE(MUTATION_OBSERVERS)
if (OwnPtr<MutationObserverInterestGroup> mutationRecipients = MutationObserverInterestGroup::createForCharacterDataMutation(this))
mutationRecipients->enqueueMutationRecord(MutationRecord::createCharacterData(this, oldData));
#endif
if (!isInShadowTree()) {
if (parentNode())
parentNode()->childrenChanged();
if (document()->hasListenerType(Document::DOMCHARACTERDATAMODIFIED_LISTENER))
dispatchScopedEvent(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;
if (offset > length()) {
ec = INDEX_SIZE_ERR;
return;
}
}
int CharacterData::maxCharacterOffset() const
{
return static_cast<int>(length());
}
bool CharacterData::rendererIsNeeded(const NodeRenderingContext& context)
{
if (!m_data || !length())
return false;
return Node::rendererIsNeeded(context);
}
bool CharacterData::offsetInCharacters() const
{
return true;
}
}