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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 "RenderIterator.h"
#include "RenderMultiColumnFlowThread.h"
#include "Text.h"
namespace WebCore {
RenderTextFragment::RenderTextFragment(Text& textNode, const String& text, int startOffset, int length)
: RenderText(textNode, text.substring(startOffset, length))
, m_start(startOffset)
, m_end(length)
, m_firstLetter(nullptr)
{
}
RenderTextFragment::RenderTextFragment(Document& document, const String& text, int startOffset, int length)
: RenderText(document, text.substring(startOffset, length))
, m_start(startOffset)
, m_end(length)
, m_firstLetter(nullptr)
{
}
RenderTextFragment::RenderTextFragment(Document& textNode, const String& text)
: RenderText(textNode, text)
, m_start(0)
, m_end(text.length())
, m_contentString(text)
, m_firstLetter(nullptr)
{
}
RenderTextFragment::~RenderTextFragment()
{
}
bool RenderTextFragment::canBeSelectionLeaf() const
{
return textNode() && textNode()->hasEditableStyle();
}
void RenderTextFragment::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderText::styleDidChange(diff, oldStyle);
if (RenderBlock* block = blockForAccompanyingFirstLetter()) {
block->mutableStyle().removeCachedPseudoStyle(FIRST_LETTER);
block->updateFirstLetter();
}
}
void RenderTextFragment::willBeDestroyed()
{
if (m_firstLetter)
m_firstLetter->destroy();
RenderText::willBeDestroyed();
}
void RenderTextFragment::setText(const String& text, bool force)
{
RenderText::setText(text, force);
m_start = 0;
m_end = textLength();
if (!m_firstLetter)
return;
m_firstLetter->destroy();
m_firstLetter = 0;
if (!textNode())
return;
ASSERT(!textNode()->renderer());
textNode()->setRenderer(this);
}
UChar RenderTextFragment::previousCharacter() const
{
if (start()) {
String original = textNode() ? textNode()->data() : contentString();
if (!original.isNull() && start() <= original.length())
return original[start() - 1];
}
return RenderText::previousCharacter();
}
RenderBlock* RenderTextFragment::blockForAccompanyingFirstLetter()
{
if (!m_firstLetter)
return nullptr;
for (auto& block : ancestorsOfType<RenderBlock>(*m_firstLetter)) {
if (is<RenderMultiColumnFlowThread>(block))
break;
if (block.style().hasPseudoStyle(FIRST_LETTER) && block.canHaveChildren())
return █
}
return nullptr;
}
void RenderTextFragment::setContentString(const String& text)
{
m_contentString = text;
setText(text);
}
} // namespace WebCore
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