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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 "CachedResourceRequest.h"
#include "CachedResourceRequestInitiators.h"
#include "Document.h"
#include "SecurityOrigin.h"
#include "StyleSheetContents.h"
#include <wtf/StdLibExtras.h>
namespace WebCore {
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_parentStyleSheet(0)
, m_styleSheetClient(this)
, m_strHref(href)
, m_mediaQueries(media)
, m_cachedSheet(0)
, m_loading(false)
{
if (!m_mediaQueries)
m_mediaQueries = MediaQuerySet::create(String());
}
StyleRuleImport::~StyleRuleImport()
{
if (m_styleSheet)
m_styleSheet->clearOwnerRule();
if (m_cachedSheet)
m_cachedSheet->removeClient(&m_styleSheetClient);
}
void StyleRuleImport::setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CachedCSSStyleSheet* cachedStyleSheet)
{
if (m_styleSheet)
m_styleSheet->clearOwnerRule();
CSSParserContext context = m_parentStyleSheet ? m_parentStyleSheet->parserContext() : CSSStrictMode;
context.charset = charset;
if (!baseURL.isNull())
context.baseURL = baseURL;
m_styleSheet = StyleSheetContents::create(this, href, context);
Document* document = m_parentStyleSheet ? m_parentStyleSheet->singleOwnerDocument() : 0;
m_styleSheet->parseAuthorStyleSheet(cachedStyleSheet, document ? document->securityOrigin() : 0);
m_loading = false;
if (m_parentStyleSheet) {
m_parentStyleSheet->notifyLoadedSheet(cachedStyleSheet);
m_parentStyleSheet->checkLoaded();
}
}
bool StyleRuleImport::isLoading() const
{
return m_loading || (m_styleSheet && m_styleSheet->isLoading());
}
void StyleRuleImport::requestStyleSheet()
{
if (!m_parentStyleSheet)
return;
Document* document = m_parentStyleSheet->singleOwnerDocument();
if (!document)
return;
CachedResourceLoader* cachedResourceLoader = document->cachedResourceLoader();
if (!cachedResourceLoader)
return;
KURL absURL;
if (!m_parentStyleSheet->baseURL().isNull())
// use parent styleheet's URL as the base URL
absURL = KURL(m_parentStyleSheet->baseURL(), m_strHref);
else
absURL = document->completeURL(m_strHref);
// Check for a cycle in our import chain. If we encounter a stylesheet
// in our parent chain with the same URL, then just bail.
StyleSheetContents* rootSheet = m_parentStyleSheet;
for (StyleSheetContents* sheet = m_parentStyleSheet; sheet; sheet = sheet->parentStyleSheet()) {
if (equalIgnoringFragmentIdentifier(absURL, sheet->baseURL())
|| equalIgnoringFragmentIdentifier(absURL, document->completeURL(sheet->originalURL())))
return;
rootSheet = sheet;
}
CachedResourceRequest request(ResourceRequest(absURL), m_parentStyleSheet->charset());
request.setInitiator(cachedResourceRequestInitiators().css);
if (m_parentStyleSheet->isUserStyleSheet())
m_cachedSheet = cachedResourceLoader->requestUserCSSStyleSheet(request);
else
m_cachedSheet = cachedResourceLoader->requestCSSStyleSheet(request);
if (m_cachedSheet) {
// 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 (m_parentStyleSheet && m_parentStyleSheet->loadCompleted() && rootSheet == m_parentStyleSheet)
m_parentStyleSheet->startLoadingDynamicSheet();
m_loading = true;
m_cachedSheet->addClient(&m_styleSheetClient);
}
}
} // namespace WebCore
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