PassRefPtr<StyleSheetContents> CachedCSSStyleSheet::restoreParsedStyleSheet(const CSSParserContext& context)
{
if (!m_parsedStyleSheetCache)
return 0;
ASSERT(m_parsedStyleSheetCache->isCacheable());
ASSERT(m_parsedStyleSheetCache->isInMemoryCache());
// Contexts must be identical so we know we would get the same exact result if we parsed again.
if (m_parsedStyleSheetCache->parserContext() != context)
return 0;
didAccessDecodedData(currentTime());
return m_parsedStyleSheetCache;
}
PassRefPtr<StyleSheetInternal> CachedCSSStyleSheet::restoreParsedStyleSheet(const CSSParserContext& context)
{
if (!m_parsedStyleSheetCache)
return 0;
// Cached parsed stylesheet has mutated, kick it out.
if (!m_parsedStyleSheetCache->isCacheable()) {
m_parsedStyleSheetCache.clear();
setDecodedSize(0);
return 0;
}
// Contexts must be identical so we know we would get the same exact result if we parsed again.
if (m_parsedStyleSheetCache->parserContext() != context)
return 0;
didAccessDecodedData(currentTime());
// FIXME: Implement copy-on-write to avoid copying when not necessary.
return m_parsedStyleSheetCache->copy();
}
PassRefPtr<StyleSheetContents> CSSStyleSheetResource::restoreParsedStyleSheet(const CSSParserContext& context)
{
if (!m_parsedStyleSheetCache)
return 0;
if (m_parsedStyleSheetCache->hasFailedOrCanceledSubresources()) {
m_parsedStyleSheetCache->removedFromMemoryCache();
m_parsedStyleSheetCache.clear();
return 0;
}
ASSERT(m_parsedStyleSheetCache->isCacheable());
ASSERT(m_parsedStyleSheetCache->isInMemoryCache());
// Contexts must be identical so we know we would get the same exact result if we parsed again.
if (m_parsedStyleSheetCache->parserContext() != context)
return 0;
didAccessDecodedData(currentTime());
return m_parsedStyleSheetCache;
}