1/*
2 * This file is part of the XSL implementation.
3 *
4 * Copyright (C) 2004-2017 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 "CachedResourceRequest.h"
30#include "Document.h"
31
32namespace WebCore {
33
34XSLImportRule::XSLImportRule(XSLStyleSheet* parent, const String& href)
35 : m_parentStyleSheet(parent)
36 , m_strHref(href)
37 , m_cachedSheet(nullptr)
38 , m_loading(false)
39{
40}
41
42XSLImportRule::~XSLImportRule()
43{
44 if (m_styleSheet)
45 m_styleSheet->setParentStyleSheet(nullptr);
46
47 if (m_cachedSheet)
48 m_cachedSheet->removeClient(*this);
49}
50
51void XSLImportRule::setXSLStyleSheet(const String& href, const URL& baseURL, const String& sheet)
52{
53 if (m_styleSheet)
54 m_styleSheet->setParentStyleSheet(nullptr);
55
56 m_styleSheet = XSLStyleSheet::create(this, href, baseURL);
57
58 XSLStyleSheet* parent = parentStyleSheet();
59 if (parent)
60 m_styleSheet->setParentStyleSheet(parent);
61
62 m_styleSheet->parseString(sheet);
63 m_loading = false;
64
65 if (parent)
66 parent->checkLoaded();
67}
68
69bool XSLImportRule::isLoading()
70{
71 return (m_loading || (m_styleSheet && m_styleSheet->isLoading()));
72}
73
74void XSLImportRule::loadSheet()
75{
76 CachedResourceLoader* cachedResourceLoader = nullptr;
77
78 XSLStyleSheet* rootSheet = parentStyleSheet();
79
80 if (rootSheet) {
81 while (XSLStyleSheet* parentSheet = rootSheet->parentStyleSheet())
82 rootSheet = parentSheet;
83 }
84
85 if (rootSheet)
86 cachedResourceLoader = rootSheet->cachedResourceLoader();
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 = URL(parentSheet->baseURL(), 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 (XSLStyleSheet* parentSheet = parentStyleSheet(); parentSheet; parentSheet = parentSheet->parentStyleSheet()) {
97 if (absHref == parentSheet->baseURL().string())
98 return;
99 }
100
101 if (m_cachedSheet)
102 m_cachedSheet->removeClient(*this);
103
104 auto options = CachedResourceLoader::defaultCachedResourceOptions();
105 options.mode = FetchOptions::Mode::SameOrigin;
106 m_cachedSheet = cachedResourceLoader->requestXSLStyleSheet({ResourceRequest(cachedResourceLoader->document()->completeURL(absHref)), options}).value_or(nullptr);
107
108 if (m_cachedSheet) {
109 m_cachedSheet->addClient(*this);
110
111 // If the imported sheet is in the cache, then setXSLStyleSheet gets called,
112 // and the sheet even gets parsed (via parseString). In this case we have
113 // loaded (even if our subresources haven't), so if we have a stylesheet after
114 // checking the cache, then we've clearly loaded.
115 if (!m_styleSheet)
116 m_loading = true;
117 }
118}
119
120} // namespace WebCore
121
122#endif // ENABLE(XSLT)
123