1 /* 2 * (C) 1999-2003 Lars Knoll (knoll (at) kde.org) 3 * (C) 2002-2003 Dirk Mueller (mueller (at) kde.org) 4 * Copyright (C) 2002, 2005, 2006, 2008, 2009, 2010 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 "CSSImportRule.h" 24 25 #include "CachedCSSStyleSheet.h" 26 #include "CachedResourceLoader.h" 27 #include "Document.h" 28 #include "SecurityOrigin.h" 29 #include "Settings.h" 30 #include <wtf/StdLibExtras.h> 31 32 namespace WebCore { 33 34 CSSImportRule::CSSImportRule(CSSStyleSheet* parent, const String& href, PassRefPtr<MediaList> media) 35 : CSSRule(parent) 36 , m_strHref(href) 37 , m_lstMedia(media) 38 , m_cachedSheet(0) 39 , m_loading(false) 40 { 41 if (m_lstMedia) 42 m_lstMedia->setParent(this); 43 else 44 m_lstMedia = MediaList::create(this, String()); 45 } 46 47 CSSImportRule::~CSSImportRule() 48 { 49 if (m_lstMedia) 50 m_lstMedia->setParent(0); 51 if (m_styleSheet) 52 m_styleSheet->setParent(0); 53 if (m_cachedSheet) 54 m_cachedSheet->removeClient(this); 55 } 56 57 void CSSImportRule::setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CachedCSSStyleSheet* sheet) 58 { 59 if (m_styleSheet) 60 m_styleSheet->setParent(0); 61 m_styleSheet = CSSStyleSheet::create(this, href, baseURL, charset); 62 63 bool crossOriginCSS = false; 64 bool validMIMEType = false; 65 CSSStyleSheet* parent = parentStyleSheet(); 66 bool strict = !parent || parent->useStrictParsing(); 67 bool enforceMIMEType = strict; 68 bool needsSiteSpecificQuirks = parent && parent->document() && parent->document()->settings() && parent->document()->settings()->needsSiteSpecificQuirks(); 69 70 #if defined(BUILDING_ON_TIGER) || defined(BUILDING_ON_LEOPARD) 71 if (enforceMIMEType && needsSiteSpecificQuirks) { 72 // Covers both http and https, with or without "www." 73 if (baseURL.string().contains("mcafee.com/japan/", false)) 74 enforceMIMEType = false; 75 } 76 #endif 77 78 String sheetText = sheet->sheetText(enforceMIMEType, &validMIMEType); 79 m_styleSheet->parseString(sheetText, strict); 80 81 if (!parent || !parent->document() || !parent->document()->securityOrigin()->canRequest(baseURL)) 82 crossOriginCSS = true; 83 84 if (crossOriginCSS && !validMIMEType && !m_styleSheet->hasSyntacticallyValidCSSHeader()) 85 m_styleSheet = CSSStyleSheet::create(this, href, baseURL, charset); 86 87 if (strict && needsSiteSpecificQuirks) { 88 // Work around <https://bugs.webkit.org/show_bug.cgi?id=28350>. 89 DEFINE_STATIC_LOCAL(const String, slashKHTMLFixesDotCss, ("/KHTMLFixes.css")); 90 DEFINE_STATIC_LOCAL(const String, mediaWikiKHTMLFixesStyleSheet, ("/* KHTML fix stylesheet */\n/* work around the horizontal scrollbars */\n#column-content { margin-left: 0; }\n\n")); 91 // There are two variants of KHTMLFixes.css. One is equal to mediaWikiKHTMLFixesStyleSheet, 92 // while the other lacks the second trailing newline. 93 if (baseURL.string().endsWith(slashKHTMLFixesDotCss) && !sheetText.isNull() && mediaWikiKHTMLFixesStyleSheet.startsWith(sheetText) 94 && sheetText.length() >= mediaWikiKHTMLFixesStyleSheet.length() - 1) { 95 ASSERT(m_styleSheet->length() == 1); 96 ExceptionCode ec; 97 m_styleSheet->deleteRule(0, ec); 98 } 99 } 100 101 m_loading = false; 102 103 if (parent) 104 parent->checkLoaded(); 105 } 106 107 bool CSSImportRule::isLoading() const 108 { 109 return m_loading || (m_styleSheet && m_styleSheet->isLoading()); 110 } 111 112 void CSSImportRule::insertedIntoParent() 113 { 114 CSSStyleSheet* parentSheet = parentStyleSheet(); 115 if (!parentSheet || !parentSheet->document()) 116 return; 117 118 CachedResourceLoader* cachedResourceLoader = parentSheet->document()->cachedResourceLoader(); 119 if (!cachedResourceLoader) 120 return; 121 122 String absHref = m_strHref; 123 if (!parentSheet->finalURL().isNull()) 124 // use parent styleheet's URL as the base URL 125 absHref = KURL(parentSheet->finalURL(), m_strHref).string(); 126 127 // Check for a cycle in our import chain. If we encounter a stylesheet 128 // in our parent chain with the same URL, then just bail. 129 StyleBase* root = this; 130 for (StyleBase* curr = parent(); curr; curr = curr->parent()) { 131 // FIXME: This is wrong if the finalURL was updated via document::updateBaseURL. 132 if (curr->isCSSStyleSheet() && absHref == static_cast<CSSStyleSheet*>(curr)->finalURL().string()) 133 return; 134 root = curr; 135 } 136 137 if (parentSheet->isUserStyleSheet()) 138 m_cachedSheet = cachedResourceLoader->requestUserCSSStyleSheet(absHref, parentSheet->charset()); 139 else 140 m_cachedSheet = cachedResourceLoader->requestCSSStyleSheet(absHref, parentSheet->charset()); 141 if (m_cachedSheet) { 142 // if the import rule is issued dynamically, the sheet may be 143 // removed from the pending sheet count, so let the doc know 144 // the sheet being imported is pending. 145 if (parentSheet && parentSheet->loadCompleted() && root == parentSheet) 146 parentSheet->document()->addPendingSheet(); 147 m_loading = true; 148 m_cachedSheet->addClient(this); 149 } 150 } 151 152 String CSSImportRule::cssText() const 153 { 154 String result = "@import url(\""; 155 result += m_strHref; 156 result += "\")"; 157 158 if (m_lstMedia) { 159 result += " "; 160 result += m_lstMedia->mediaText(); 161 } 162 result += ";"; 163 164 return result; 165 } 166 167 void CSSImportRule::addSubresourceStyleURLs(ListHashSet<KURL>& urls) 168 { 169 if (m_styleSheet) 170 addSubresourceURL(urls, m_styleSheet->baseURL()); 171 } 172 173 } // namespace WebCore 174