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 "XSLImportRule.h"
24
25 #if ENABLE(XSLT)
26
27 #include "CachedXSLStyleSheet.h"
28 #include "CachedResourceLoader.h"
29 #include "XSLStyleSheet.h"
30
31 namespace WebCore {
32
XSLImportRule(XSLStyleSheet * parent,const String & href)33 XSLImportRule::XSLImportRule(XSLStyleSheet* parent, const String& href)
34 : StyleBase(parent)
35 , m_strHref(href)
36 , m_cachedSheet(0)
37 , m_loading(false)
38 {
39 }
40
~XSLImportRule()41 XSLImportRule::~XSLImportRule()
42 {
43 if (m_styleSheet)
44 m_styleSheet->setParent(0);
45
46 if (m_cachedSheet)
47 m_cachedSheet->removeClient(this);
48 }
49
parentStyleSheet() const50 XSLStyleSheet* XSLImportRule::parentStyleSheet() const
51 {
52 return (parent() && parent()->isXSLStyleSheet()) ? static_cast<XSLStyleSheet*>(parent()) : 0;
53 }
54
setXSLStyleSheet(const String & href,const KURL & baseURL,const String & sheet)55 void XSLImportRule::setXSLStyleSheet(const String& href, const KURL& baseURL, const String& sheet)
56 {
57 if (m_styleSheet)
58 m_styleSheet->setParent(0);
59
60 m_styleSheet = XSLStyleSheet::create(this, href, baseURL);
61
62 XSLStyleSheet* parent = parentStyleSheet();
63 if (parent)
64 m_styleSheet->setParentStyleSheet(parent);
65
66 m_styleSheet->parseString(sheet);
67 m_loading = false;
68
69 if (parent)
70 parent->checkLoaded();
71 }
72
isLoading()73 bool XSLImportRule::isLoading()
74 {
75 return (m_loading || (m_styleSheet && m_styleSheet->isLoading()));
76 }
77
loadSheet()78 void XSLImportRule::loadSheet()
79 {
80 CachedResourceLoader* cachedResourceLoader = 0;
81 StyleBase* root = this;
82 StyleBase* parent;
83 while ((parent = root->parent()))
84 root = parent;
85 if (root->isXSLStyleSheet())
86 cachedResourceLoader = static_cast<XSLStyleSheet*>(root)->cachedResourceLoader();
87
88 String absHref = m_strHref;
89 XSLStyleSheet* parentSheet = parentStyleSheet();
90 if (!parentSheet->finalURL().isNull())
91 // use parent styleheet's URL as the base URL
92 absHref = KURL(parentSheet->finalURL(), m_strHref).string();
93
94 // Check for a cycle in our import chain. If we encounter a stylesheet
95 // in our parent chain with the same URL, then just bail.
96 for (parent = this->parent(); parent; parent = parent->parent()) {
97 if (parent->isXSLStyleSheet() && absHref == static_cast<XSLStyleSheet*>(parent)->finalURL().string())
98 return;
99 }
100
101 m_cachedSheet = cachedResourceLoader->requestXSLStyleSheet(absHref);
102
103 if (m_cachedSheet) {
104 m_cachedSheet->addClient(this);
105
106 // If the imported sheet is in the cache, then setXSLStyleSheet gets called,
107 // and the sheet even gets parsed (via parseString). In this case we have
108 // loaded (even if our subresources haven't), so if we have a stylesheet after
109 // checking the cache, then we've clearly loaded.
110 if (!m_styleSheet)
111 m_loading = true;
112 }
113 }
114
115 } // namespace WebCore
116
117 #endif // ENABLE(XSLT)
118