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 "core/css/StyleRuleImport.h"
24
25 #include "FetchInitiatorTypeNames.h"
26 #include "core/css/StyleSheetContents.h"
27 #include "core/dom/Document.h"
28 #include "core/fetch/CSSStyleSheetResource.h"
29 #include "core/fetch/FetchRequest.h"
30 #include "core/fetch/ResourceFetcher.h"
31
32 namespace WebCore {
33
create(const String & href,PassRefPtr<MediaQuerySet> media)34 PassRefPtr<StyleRuleImport> StyleRuleImport::create(const String& href, PassRefPtr<MediaQuerySet> media)
35 {
36 return adoptRef(new StyleRuleImport(href, media));
37 }
38
StyleRuleImport(const String & href,PassRefPtr<MediaQuerySet> media)39 StyleRuleImport::StyleRuleImport(const String& href, PassRefPtr<MediaQuerySet> media)
40 : StyleRuleBase(Import)
41 , m_parentStyleSheet(0)
42 , m_styleSheetClient(this)
43 , m_strHref(href)
44 , m_mediaQueries(media)
45 , m_resource(0)
46 , m_loading(false)
47 {
48 if (!m_mediaQueries)
49 m_mediaQueries = MediaQuerySet::create(String());
50 }
51
~StyleRuleImport()52 StyleRuleImport::~StyleRuleImport()
53 {
54 if (m_styleSheet)
55 m_styleSheet->clearOwnerRule();
56 if (m_resource)
57 m_resource->removeClient(&m_styleSheetClient);
58 }
59
setCSSStyleSheet(const String & href,const KURL & baseURL,const String & charset,const CSSStyleSheetResource * cachedStyleSheet)60 void StyleRuleImport::setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource* cachedStyleSheet)
61 {
62 if (m_styleSheet)
63 m_styleSheet->clearOwnerRule();
64
65 CSSParserContext context = m_parentStyleSheet ? m_parentStyleSheet->parserContext() : HTMLStandardMode;
66 context.setCharset(charset);
67 if (!baseURL.isNull())
68 context.setBaseURL(baseURL);
69
70 m_styleSheet = StyleSheetContents::create(this, href, context);
71
72 Document* document = m_parentStyleSheet ? m_parentStyleSheet->singleOwnerDocument() : 0;
73 m_styleSheet->parseAuthorStyleSheet(cachedStyleSheet, document ? document->securityOrigin() : 0);
74
75 m_loading = false;
76
77 if (m_parentStyleSheet) {
78 m_parentStyleSheet->notifyLoadedSheet(cachedStyleSheet);
79 m_parentStyleSheet->checkLoaded();
80 }
81 }
82
isLoading() const83 bool StyleRuleImport::isLoading() const
84 {
85 return m_loading || (m_styleSheet && m_styleSheet->isLoading());
86 }
87
requestStyleSheet()88 void StyleRuleImport::requestStyleSheet()
89 {
90 if (!m_parentStyleSheet)
91 return;
92 Document* document = m_parentStyleSheet->singleOwnerDocument();
93 if (!document)
94 return;
95
96 ResourceFetcher* fetcher = document->fetcher();
97 if (!fetcher)
98 return;
99
100 KURL absURL;
101 if (!m_parentStyleSheet->baseURL().isNull())
102 // use parent styleheet's URL as the base URL
103 absURL = KURL(m_parentStyleSheet->baseURL(), m_strHref);
104 else
105 absURL = document->completeURL(m_strHref);
106
107 // Check for a cycle in our import chain. If we encounter a stylesheet
108 // in our parent chain with the same URL, then just bail.
109 StyleSheetContents* rootSheet = m_parentStyleSheet;
110 for (StyleSheetContents* sheet = m_parentStyleSheet; sheet; sheet = sheet->parentStyleSheet()) {
111 if (equalIgnoringFragmentIdentifier(absURL, sheet->baseURL())
112 || equalIgnoringFragmentIdentifier(absURL, document->completeURL(sheet->originalURL())))
113 return;
114 rootSheet = sheet;
115 }
116
117 FetchRequest request(ResourceRequest(absURL), FetchInitiatorTypeNames::css, m_parentStyleSheet->charset());
118 m_resource = fetcher->fetchCSSStyleSheet(request);
119 if (m_resource) {
120 // if the import rule is issued dynamically, the sheet may be
121 // removed from the pending sheet count, so let the doc know
122 // the sheet being imported is pending.
123 if (m_parentStyleSheet && m_parentStyleSheet->loadCompleted() && rootSheet == m_parentStyleSheet)
124 m_parentStyleSheet->startLoadingDynamicSheet();
125 m_loading = true;
126 m_resource->addClient(&m_styleSheetClient);
127 }
128 }
129
130 } // namespace WebCore
131