1 /*
2 * This file is part of the XSL implementation.
3 *
4 * Copyright (C) 2004, 2005, 2006, 2008 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/xml/XSLImportRule.h"
24
25 #include "core/FetchInitiatorTypeNames.h"
26 #include "core/dom/Document.h"
27 #include "core/fetch/FetchRequest.h"
28 #include "core/fetch/ResourceFetcher.h"
29 #include "core/fetch/XSLStyleSheetResource.h"
30
31 namespace WebCore {
32
XSLImportRule(XSLStyleSheet * parent,const String & href)33 XSLImportRule::XSLImportRule(XSLStyleSheet* parent, const String& href)
34 : m_parentStyleSheet(parent)
35 , m_strHref(href)
36 , m_resource(0)
37 , m_loading(false)
38 {
39 }
40
~XSLImportRule()41 XSLImportRule::~XSLImportRule()
42 {
43 #if !ENABLE(OILPAN)
44 if (m_styleSheet)
45 m_styleSheet->setParentStyleSheet(0);
46 #endif
47
48 if (m_resource)
49 m_resource->removeClient(this);
50 }
51
setXSLStyleSheet(const String & href,const KURL & baseURL,const String & sheet)52 void XSLImportRule::setXSLStyleSheet(const String& href, const KURL& baseURL, const String& sheet)
53 {
54 if (m_styleSheet)
55 m_styleSheet->setParentStyleSheet(0);
56
57 m_styleSheet = XSLStyleSheet::create(this, href, baseURL);
58
59 XSLStyleSheet* parent = parentStyleSheet();
60 if (parent)
61 m_styleSheet->setParentStyleSheet(parent);
62
63 m_styleSheet->parseString(sheet);
64 m_loading = false;
65
66 if (parent)
67 parent->checkLoaded();
68 }
69
isLoading()70 bool XSLImportRule::isLoading()
71 {
72 return m_loading || (m_styleSheet && m_styleSheet->isLoading());
73 }
74
loadSheet()75 void XSLImportRule::loadSheet()
76 {
77 ResourceFetcher* fetcher = 0;
78 XSLStyleSheet* rootSheet = parentStyleSheet();
79
80 if (rootSheet) {
81 while (XSLStyleSheet* parentSheet = rootSheet->parentStyleSheet())
82 rootSheet = parentSheet;
83 }
84
85 if (rootSheet)
86 fetcher = rootSheet->fetcher();
87
88 String absHref = m_strHref;
89 XSLStyleSheet* parentSheet = parentStyleSheet();
90 if (!parentSheet->baseURL().isNull()) {
91 // Use parent styleheet's URL as the base URL
92 absHref = KURL(parentSheet->baseURL(), m_strHref).string();
93 }
94
95 // Check for a cycle in our import chain. If we encounter a stylesheet in
96 // our parent chain with the same URL, then just bail.
97 for (XSLStyleSheet* parentSheet = parentStyleSheet(); parentSheet; parentSheet = parentSheet->parentStyleSheet()) {
98 if (absHref == parentSheet->baseURL().string())
99 return;
100 }
101
102 FetchRequest request(ResourceRequest(fetcher->document()->completeURL(absHref)), FetchInitiatorTypeNames::xml);
103 m_resource = fetcher->fetchXSLStyleSheet(request);
104
105 if (m_resource) {
106 m_resource->addClient(this);
107
108 // If the imported sheet is in the cache, then setXSLStyleSheet gets
109 // called, and the sheet even gets parsed (via parseString). In this
110 // case we have loaded (even if our subresources haven't), so if we have
111 // a stylesheet after checking the cache, then we've clearly loaded.
112 if (!m_styleSheet)
113 m_loading = true;
114 }
115 }
116
trace(Visitor * visitor)117 void XSLImportRule::trace(Visitor* visitor)
118 {
119 visitor->trace(m_parentStyleSheet);
120 visitor->trace(m_styleSheet);
121 }
122
123 } // namespace WebCore
124