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/*
* (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007 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 "RenderTextFragment.h"
#include "RenderBlock.h"
#include "Text.h"
namespace WebCore {
RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str, int startOffset, int length)
: RenderText(node, str ? str->substring(startOffset, length) : 0)
, m_start(startOffset)
, m_end(length)
, m_firstLetter(0)
{
}
RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str)
: RenderText(node, str)
, m_start(0)
, m_end(str ? str->length() : 0)
, m_contentString(str)
, m_firstLetter(0)
{
}
RenderTextFragment::~RenderTextFragment()
{
}
PassRefPtr<StringImpl> RenderTextFragment::originalText() const
{
Node* e = node();
RefPtr<StringImpl> result = ((e && e->isTextNode()) ? static_cast<Text*>(e)->dataImpl() : contentString());
if (!result)
return 0;
return result->substring(start(), end());
}
void RenderTextFragment::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderText::styleDidChange(diff, oldStyle);
if (RenderBlock* block = blockForAccompanyingFirstLetter()) {
block->style()->removeCachedPseudoStyle(FIRST_LETTER);
block->updateFirstLetter();
}
}
void RenderTextFragment::destroy()
{
if (m_firstLetter)
m_firstLetter->destroy();
RenderText::destroy();
}
void RenderTextFragment::setTextInternal(PassRefPtr<StringImpl> text)
{
RenderText::setTextInternal(text);
if (m_firstLetter) {
ASSERT(!m_contentString);
m_firstLetter->destroy();
m_firstLetter = 0;
m_start = 0;
m_end = textLength();
if (Node* t = node()) {
ASSERT(!t->renderer());
t->setRenderer(this);
}
}
}
UChar RenderTextFragment::previousCharacter() const
{
if (start()) {
Node* e = node();
StringImpl* original = ((e && e->isTextNode()) ? static_cast<Text*>(e)->dataImpl() : contentString());
if (original && start() <= original->length())
return (*original)[start() - 1];
}
return RenderText::previousCharacter();
}
RenderBlock* RenderTextFragment::blockForAccompanyingFirstLetter() const
{
if (!m_firstLetter)
return 0;
for (RenderObject* block = m_firstLetter->parent(); block; block = block->parent()) {
if (block->style()->hasPseudoStyle(FIRST_LETTER) && block->canHaveChildren() && block->isRenderBlock())
return toRenderBlock(block);
}
return 0;
}
} // namespace WebCore
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