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 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
CSSImportRule(CSSStyleSheet * parent,const String & href,PassRefPtr<MediaList> media)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
~CSSImportRule()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
setCSSStyleSheet(const String & href,const KURL & baseURL,const String & charset,const CachedCSSStyleSheet * sheet)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
isLoading() const107 bool CSSImportRule::isLoading() const
108 {
109 return m_loading || (m_styleSheet && m_styleSheet->isLoading());
110 }
111
insertedIntoParent()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
cssText() const152 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
addSubresourceStyleURLs(ListHashSet<KURL> & urls)167 void CSSImportRule::addSubresourceStyleURLs(ListHashSet<KURL>& urls)
168 {
169 if (m_styleSheet)
170 addSubresourceURL(urls, m_styleSheet->baseURL());
171 }
172
173 #ifdef ANDROID_INSTRUMENT
operator new(size_t size)174 void* CSSImportRule::operator new(size_t size)
175 {
176 return StyleBase::operator new(size);
177 }
178
operator new[](size_t size)179 void* CSSImportRule::operator new[](size_t size)
180 {
181 return StyleBase::operator new[](size);
182 }
183
operator delete(void * p,size_t size)184 void CSSImportRule::operator delete(void* p, size_t size)
185 {
186 StyleBase::operator delete(p, size);
187 }
188
operator delete[](void * p,size_t size)189 void CSSImportRule::operator delete[](void* p, size_t size)
190 {
191 StyleBase::operator delete[](p, size);
192 }
193 #endif
194
195 } // namespace WebCore
196