RenderTextFragment.cpp [plain text]
#include "config.h"
#include "RenderTextFragment.h"
#include "RenderBlock.h"
#include "RenderIterator.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->style().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;
ASSERT(!m_contentString);
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 (block.style().hasPseudoStyle(FIRST_LETTER) && block.canHaveChildren())
return █
}
return nullptr;
}
}