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      1 /*
      2  * This file is part of the XSL implementation.
      3  *
      4  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple, Inc. All rights reserved.
      5  * Copyright (C) 2005, 2006 Alexey Proskuryakov <ap (at) webkit.org>
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  */
     22 
     23 #include "config.h"
     24 #include "core/xml/XSLTProcessor.h"
     25 
     26 #include "core/dom/DOMImplementation.h"
     27 #include "core/dom/DocumentEncodingData.h"
     28 #include "core/dom/DocumentFragment.h"
     29 #include "core/editing/markup.h"
     30 #include "core/frame/ContentSecurityPolicy.h"
     31 #include "core/frame/DOMWindow.h"
     32 #include "core/frame/Frame.h"
     33 #include "core/frame/FrameView.h"
     34 #include "platform/weborigin/SecurityOrigin.h"
     35 #include "wtf/Assertions.h"
     36 #include "wtf/Vector.h"
     37 
     38 namespace WebCore {
     39 
     40 static inline void transformTextStringToXHTMLDocumentString(String& text)
     41 {
     42     // Modify the output so that it is a well-formed XHTML document with a <pre> tag enclosing the text.
     43     text.replaceWithLiteral('&', "&amp;");
     44     text.replaceWithLiteral('<', "&lt;");
     45     text = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
     46         "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n"
     47         "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n"
     48         "<head><title/></head>\n"
     49         "<body>\n"
     50         "<pre>" + text + "</pre>\n"
     51         "</body>\n"
     52         "</html>\n";
     53 }
     54 
     55 XSLTProcessor::~XSLTProcessor()
     56 {
     57     // Stylesheet shouldn't outlive its root node.
     58     ASSERT(!m_stylesheetRootNode || !m_stylesheet || m_stylesheet->hasOneRef());
     59 }
     60 
     61 PassRefPtr<Document> XSLTProcessor::createDocumentFromSource(const String& sourceString,
     62     const String& sourceEncoding, const String& sourceMIMEType, Node* sourceNode, Frame* frame)
     63 {
     64     RefPtr<Document> ownerDocument(sourceNode->document());
     65     bool sourceIsDocument = (sourceNode == ownerDocument.get());
     66     String documentSource = sourceString;
     67 
     68     RefPtr<Document> result;
     69     DocumentInit init(sourceIsDocument ? ownerDocument->url() : KURL(), frame);
     70 
     71     bool forceXHTML = sourceMIMEType == "text/plain";
     72     if (forceXHTML)
     73         transformTextStringToXHTMLDocumentString(documentSource);
     74 
     75     if (frame) {
     76         RefPtr<Document> oldDocument = frame->document();
     77         result = frame->domWindow()->installNewDocument(sourceMIMEType, init, forceXHTML);
     78 
     79         // Before parsing, we need to save & detach the old document and get the new document
     80         // in place. We have to do this only if we're rendering the result document.
     81         if (FrameView* view = frame->view())
     82             view->clear();
     83 
     84         if (oldDocument) {
     85             result->setTransformSourceDocument(oldDocument.get());
     86             result->updateSecurityOrigin(oldDocument->securityOrigin());
     87             result->setCookieURL(oldDocument->cookieURL());
     88             result->contentSecurityPolicy()->copyStateFrom(oldDocument->contentSecurityPolicy());
     89         }
     90     } else {
     91         result = DOMWindow::createDocument(sourceMIMEType, init, forceXHTML);
     92     }
     93 
     94     DocumentEncodingData data;
     95     data.encoding = sourceEncoding.isEmpty() ? UTF8Encoding() : WTF::TextEncoding(sourceEncoding);
     96     result->setEncodingData(data);
     97     result->setContent(documentSource);
     98 
     99     return result.release();
    100 }
    101 
    102 PassRefPtr<Document> XSLTProcessor::transformToDocument(Node* sourceNode)
    103 {
    104     if (!sourceNode)
    105         return 0;
    106 
    107     String resultMIMEType;
    108     String resultString;
    109     String resultEncoding;
    110     if (!transformToString(sourceNode, resultMIMEType, resultString, resultEncoding))
    111         return 0;
    112     return createDocumentFromSource(resultString, resultEncoding, resultMIMEType, sourceNode, 0);
    113 }
    114 
    115 PassRefPtr<DocumentFragment> XSLTProcessor::transformToFragment(Node* sourceNode, Document* outputDoc)
    116 {
    117     if (!sourceNode || !outputDoc)
    118         return 0;
    119 
    120     String resultMIMEType;
    121     String resultString;
    122     String resultEncoding;
    123 
    124     // If the output document is HTML, default to HTML method.
    125     if (outputDoc->isHTMLDocument())
    126         resultMIMEType = "text/html";
    127 
    128     if (!transformToString(sourceNode, resultMIMEType, resultString, resultEncoding))
    129         return 0;
    130     return createFragmentForTransformToFragment(resultString, resultMIMEType, *outputDoc);
    131 }
    132 
    133 void XSLTProcessor::setParameter(const String& /*namespaceURI*/, const String& localName, const String& value)
    134 {
    135     // FIXME: namespace support?
    136     // should make a QualifiedName here but we'd have to expose the impl
    137     m_parameters.set(localName, value);
    138 }
    139 
    140 String XSLTProcessor::getParameter(const String& /*namespaceURI*/, const String& localName) const
    141 {
    142     // FIXME: namespace support?
    143     // should make a QualifiedName here but we'd have to expose the impl
    144     return m_parameters.get(localName);
    145 }
    146 
    147 void XSLTProcessor::removeParameter(const String& /*namespaceURI*/, const String& localName)
    148 {
    149     // FIXME: namespace support?
    150     m_parameters.remove(localName);
    151 }
    152 
    153 void XSLTProcessor::reset()
    154 {
    155     m_stylesheet.clear();
    156     m_stylesheetRootNode.clear();
    157     m_parameters.clear();
    158 }
    159 
    160 } // namespace WebCore
    161