RenderTextFragment.cpp [plain text]
#include "config.h"
#include "RenderTextFragment.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)
{
}
PassRefPtr<StringImpl> RenderTextFragment::originalText() const
{
Node* e = node();
RefPtr<StringImpl> result = (e ? static_cast<Text*>(e)->dataImpl() : contentString());
if (result && (start() > 0 || start() < result->length()))
result = result->substring(start(), end());
return result.release();
}
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()
{
if (start()) {
Node* e = node();
StringImpl* original = (e ? static_cast<Text*>(e)->dataImpl() : contentString());
if (original)
return (*original)[start() - 1];
}
return RenderText::previousCharacter();
}
}