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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2002, 2005, 2006, 2008, 2009, 2010, 2012 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 "StyleRuleImport.h"
#include "CSSStyleSheet.h"
#include "CachedCSSStyleSheet.h"
#include "CachedResourceLoader.h"
#include "Document.h"
#include "SecurityOrigin.h"
#include "StyleSheetContents.h"
#include <wtf/StdLibExtras.h>
namespace WebCore {
StyleRuleImport::LoadContext::LoadContext(CSSStyleSheet* rootStyleSheet, const CSSParserContext& parentParserContext)
: rootStyleSheet(rootStyleSheet)
, parentParserContext(parentParserContext)
{
}
PassRefPtr<StyleRuleImport> StyleRuleImport::create(const String& href, PassRefPtr<MediaQuerySet> media)
{
return adoptRef(new StyleRuleImport(href, media));
}
StyleRuleImport::StyleRuleImport(const String& href, PassRefPtr<MediaQuerySet> media)
: StyleRuleBase(Import, 0)
, m_strHref(href)
, m_mediaQueries(media)
, m_cachedSheet(0)
{
if (!m_mediaQueries)
m_mediaQueries = MediaQuerySet::create(String());
}
StyleRuleImport::~StyleRuleImport()
{
if (m_cachedSheet)
m_cachedSheet->removeClient(this);
}
void StyleRuleImport::setCSSStyleSheet(const String& url, const KURL& baseURL, const String& charset, const CachedCSSStyleSheet*)
{
ASSERT(m_loadContext);
ASSERT(!m_styleSheet);
ASSERT(m_cachedSheet);
OwnPtr<LoadContext> loadContext = m_loadContext.release();
CSSParserContext parserContext = loadContext->parentParserContext;
if (!baseURL.isNull())
parserContext.baseURL = baseURL;
parserContext.charset = charset;
#if ENABLE(PARSED_STYLE_SHEET_CACHING)
m_styleSheet = m_cachedSheet->restoreParsedStyleSheet(parserContext);
#endif
if (!m_styleSheet) {
m_styleSheet = StyleSheetContents::create(url, parserContext);
m_styleSheet->parseAuthorStyleSheet(m_cachedSheet.get(), loadContext->rootStyleSheet.get());
}
loadContext->rootStyleSheet->contents()->checkLoadCompleted();
#if ENABLE(PARSED_STYLE_SHEET_CACHING)
if (m_styleSheet->isCacheable())
m_cachedSheet->saveParsedStyleSheet(m_styleSheet);
#endif
}
bool StyleRuleImport::isLoading() const
{
return m_loadContext || (m_styleSheet && m_styleSheet->isLoading());
}
bool StyleRuleImport::hadLoadError() const
{
return m_cachedSheet && m_cachedSheet->errorOccurred();
}
void StyleRuleImport::requestStyleSheet(CSSStyleSheet* rootSheet, const CSSParserContext& parserContext)
{
ASSERT(!rootSheet->parentStyleSheet());
ASSERT(!m_cachedSheet);
Node* ownerNode = rootSheet->ownerNode();
if (!ownerNode)
return;
Document* document = ownerNode->document();
KURL resolvedURL;
if (!parserContext.baseURL.isNull())
resolvedURL = KURL(parserContext.baseURL, m_strHref);
else
resolvedURL = document->completeURL(m_strHref);
StyleSheetContents* rootSheetContents = rootSheet->contents();
if (rootSheetContents->hasImportCycle(this, resolvedURL, document->baseURL()))
return;
ResourceRequest request(resolvedURL);
CachedResourceLoader* cachedResourceLoader = document->cachedResourceLoader();
if (rootSheetContents->isUserStyleSheet())
m_cachedSheet = cachedResourceLoader->requestUserCSSStyleSheet(request, parserContext.charset);
else
m_cachedSheet = cachedResourceLoader->requestCSSStyleSheet(request, parserContext.charset);
if (!m_cachedSheet)
return;
// if the import rule is issued dynamically, the sheet may be
// removed from the pending sheet count, so let the doc know
// the sheet being imported is pending.
if (rootSheetContents->loadCompleted())
ownerNode->startLoadingDynamicSheet();
m_loadContext = adoptPtr(new LoadContext(rootSheet, parserContext));
m_cachedSheet->addClient(this);
}
void StyleRuleImport::reattachStyleSheetContents(StyleSheetContents* contents)
{
m_styleSheet = contents;
}
void StyleRuleImport::reportDescendantMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
{
MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::CSS);
info.addInstrumentedMember(m_strHref);
info.addInstrumentedMember(m_mediaQueries);
info.addInstrumentedMember(m_styleSheet);
}
} // namespace WebCore
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