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 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 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 50 XSLStyleSheet* XSLImportRule::parentStyleSheet() const 51 { 52 return (parent() && parent()->isXSLStyleSheet()) ? static_cast<XSLStyleSheet*>(parent()) : 0; 53 } 54 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 73 bool XSLImportRule::isLoading() 74 { 75 return (m_loading || (m_styleSheet && m_styleSheet->isLoading())); 76 } 77 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
