1/* 2 * (C) 1999-2003 Lars Knoll (knoll@kde.org) 3 * (C) 2002-2003 Dirk Mueller (mueller@kde.org) 4 * Copyright (C) 2002, 2005, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public License 17 * along with this library; see the file COPYING.LIB. If not, write to 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 */ 21 22#include "config.h" 23#include "StyleRuleImport.h" 24 25#include "CSSStyleSheet.h" 26#include "CachedCSSStyleSheet.h" 27#include "CachedResourceLoader.h" 28#include "CachedResourceRequest.h" 29#include "CachedResourceRequestInitiators.h" 30#include "Document.h" 31#include "SecurityOrigin.h" 32#include "StyleSheetContents.h" 33#include <wtf/StdLibExtras.h> 34 35namespace WebCore { 36 37PassRefPtr<StyleRuleImport> StyleRuleImport::create(const String& href, PassRefPtr<MediaQuerySet> media) 38{ 39 return adoptRef(new StyleRuleImport(href, media)); 40} 41 42StyleRuleImport::StyleRuleImport(const String& href, PassRefPtr<MediaQuerySet> media) 43 : StyleRuleBase(Import, 0) 44 , m_parentStyleSheet(0) 45 , m_styleSheetClient(this) 46 , m_strHref(href) 47 , m_mediaQueries(media) 48 , m_cachedSheet(0) 49 , m_loading(false) 50{ 51 if (!m_mediaQueries) 52 m_mediaQueries = MediaQuerySet::create(String()); 53} 54 55StyleRuleImport::~StyleRuleImport() 56{ 57 if (m_styleSheet) 58 m_styleSheet->clearOwnerRule(); 59 if (m_cachedSheet) 60 m_cachedSheet->removeClient(&m_styleSheetClient); 61} 62 63void StyleRuleImport::setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CachedCSSStyleSheet* cachedStyleSheet) 64{ 65 if (m_styleSheet) 66 m_styleSheet->clearOwnerRule(); 67 68 CSSParserContext context = m_parentStyleSheet ? m_parentStyleSheet->parserContext() : CSSStrictMode; 69 context.charset = charset; 70 if (!baseURL.isNull()) 71 context.baseURL = baseURL; 72 73 m_styleSheet = StyleSheetContents::create(this, href, context); 74 75 Document* document = m_parentStyleSheet ? m_parentStyleSheet->singleOwnerDocument() : 0; 76 m_styleSheet->parseAuthorStyleSheet(cachedStyleSheet, document ? document->securityOrigin() : 0); 77 78 m_loading = false; 79 80 if (m_parentStyleSheet) { 81 m_parentStyleSheet->notifyLoadedSheet(cachedStyleSheet); 82 m_parentStyleSheet->checkLoaded(); 83 } 84} 85 86bool StyleRuleImport::isLoading() const 87{ 88 return m_loading || (m_styleSheet && m_styleSheet->isLoading()); 89} 90 91void StyleRuleImport::requestStyleSheet() 92{ 93 if (!m_parentStyleSheet) 94 return; 95 Document* document = m_parentStyleSheet->singleOwnerDocument(); 96 if (!document) 97 return; 98 99 CachedResourceLoader* cachedResourceLoader = document->cachedResourceLoader(); 100 if (!cachedResourceLoader) 101 return; 102 103 KURL absURL; 104 if (!m_parentStyleSheet->baseURL().isNull()) 105 // use parent styleheet's URL as the base URL 106 absURL = KURL(m_parentStyleSheet->baseURL(), m_strHref); 107 else 108 absURL = document->completeURL(m_strHref); 109 110 // Check for a cycle in our import chain. If we encounter a stylesheet 111 // in our parent chain with the same URL, then just bail. 112 StyleSheetContents* rootSheet = m_parentStyleSheet; 113 for (StyleSheetContents* sheet = m_parentStyleSheet; sheet; sheet = sheet->parentStyleSheet()) { 114 if (equalIgnoringFragmentIdentifier(absURL, sheet->baseURL()) 115 || equalIgnoringFragmentIdentifier(absURL, document->completeURL(sheet->originalURL()))) 116 return; 117 rootSheet = sheet; 118 } 119 120 CachedResourceRequest request(ResourceRequest(absURL), m_parentStyleSheet->charset()); 121 request.setInitiator(cachedResourceRequestInitiators().css); 122 if (m_parentStyleSheet->isUserStyleSheet()) 123 m_cachedSheet = cachedResourceLoader->requestUserCSSStyleSheet(request); 124 else 125 m_cachedSheet = cachedResourceLoader->requestCSSStyleSheet(request); 126 if (m_cachedSheet) { 127 // if the import rule is issued dynamically, the sheet may be 128 // removed from the pending sheet count, so let the doc know 129 // the sheet being imported is pending. 130 if (m_parentStyleSheet && m_parentStyleSheet->loadCompleted() && rootSheet == m_parentStyleSheet) 131 m_parentStyleSheet->startLoadingDynamicSheet(); 132 m_loading = true; 133 m_cachedSheet->addClient(&m_styleSheetClient); 134 } 135} 136 137} // namespace WebCore 138