RenderTextFragment.cpp [plain text]
#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) : PassRefPtr<StringImpl>(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()) ? toText(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::willBeDestroyed()
{
if (m_firstLetter)
m_firstLetter->destroy();
RenderText::willBeDestroyed();
}
void RenderTextFragment::setText(PassRefPtr<StringImpl> text, bool force)
{
RenderText::setText(text, force);
m_start = 0;
m_end = textLength();
if (m_firstLetter) {
ASSERT(!m_contentString);
m_firstLetter->destroy();
m_firstLetter = 0;
if (Node* t = node()) {
ASSERT(!t->renderer());
t->setRenderer(this);
}
}
}
void RenderTextFragment::transformText()
{
if (RefPtr<StringImpl> textToTransform = originalText())
RenderText::setText(textToTransform.release(), true);
}
UChar RenderTextFragment::previousCharacter() const
{
if (start()) {
Node* e = node();
StringImpl* original = ((e && e->isTextNode()) ? toText(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;
}
}