Home | History | Annotate | Download | only in xml 
      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/LocalDOMWindow.h"
     31 #include "core/frame/FrameView.h"
     32 #include "core/frame/LocalFrame.h"
     33 #include "core/frame/csp/ContentSecurityPolicy.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 #if !ENABLE(OILPAN)
     58     // Stylesheet shouldn't outlive its root node.
     59     ASSERT(!m_stylesheetRootNode || !m_stylesheet || m_stylesheet->hasOneRef());
     60 #endif
     61 }
     62 
     63 PassRefPtrWillBeRawPtr<Document> XSLTProcessor::createDocumentFromSource(const String& sourceString,
     64     const String& sourceEncoding, const String& sourceMIMEType, Node* sourceNode, LocalFrame* frame)
     65 {
     66     RefPtrWillBeRawPtr<Document> ownerDocument(sourceNode->document());
     67     bool sourceIsDocument = (sourceNode == ownerDocument.get());
     68     String documentSource = sourceString;
     69 
     70     RefPtrWillBeRawPtr<Document> result = nullptr;
     71     DocumentInit init(sourceIsDocument ? ownerDocument->url() : KURL(), frame);
     72 
     73     bool forceXHTML = sourceMIMEType == "text/plain";
     74     if (forceXHTML)
     75         transformTextStringToXHTMLDocumentString(documentSource);
     76 
     77     if (frame) {
     78         RefPtrWillBeRawPtr<Document> oldDocument = frame->document();
     79         result = frame->domWindow()->installNewDocument(sourceMIMEType, init, forceXHTML);
     80 
     81         // Before parsing, we need to save & detach the old document and get the new document
     82         // in place. We have to do this only if we're rendering the result document.
     83         if (FrameView* view = frame->view())
     84             view->clear();
     85 
     86         if (oldDocument) {
     87             result->setTransformSourceDocument(oldDocument.get());
     88             result->updateSecurityOrigin(oldDocument->securityOrigin());
     89             result->setCookieURL(oldDocument->cookieURL());
     90             result->contentSecurityPolicy()->copyStateFrom(oldDocument->contentSecurityPolicy());
     91         }
     92     } else {
     93         result = LocalDOMWindow::createDocument(sourceMIMEType, init, forceXHTML);
     94     }
     95 
     96     DocumentEncodingData data;
     97     data.setEncoding(sourceEncoding.isEmpty() ? UTF8Encoding() : WTF::TextEncoding(sourceEncoding));
     98     result->setEncodingData(data);
     99     result->setContent(documentSource);
    100 
    101     return result.release();
    102 }
    103 
    104 PassRefPtrWillBeRawPtr<Document> XSLTProcessor::transformToDocument(Node* sourceNode)
    105 {
    106     if (!sourceNode)
    107         return nullptr;
    108 
    109     String resultMIMEType;
    110     String resultString;
    111     String resultEncoding;
    112     if (!transformToString(sourceNode, resultMIMEType, resultString, resultEncoding))
    113         return nullptr;
    114     return createDocumentFromSource(resultString, resultEncoding, resultMIMEType, sourceNode, 0);
    115 }
    116 
    117 PassRefPtrWillBeRawPtr<DocumentFragment> XSLTProcessor::transformToFragment(Node* sourceNode, Document* outputDoc)
    118 {
    119     if (!sourceNode || !outputDoc)
    120         return nullptr;
    121 
    122     String resultMIMEType;
    123     String resultString;
    124     String resultEncoding;
    125 
    126     // If the output document is HTML, default to HTML method.
    127     if (outputDoc->isHTMLDocument())
    128         resultMIMEType = "text/html";
    129 
    130     if (!transformToString(sourceNode, resultMIMEType, resultString, resultEncoding))
    131         return nullptr;
    132     return createFragmentForTransformToFragment(resultString, resultMIMEType, *outputDoc);
    133 }
    134 
    135 void XSLTProcessor::setParameter(const String& /*namespaceURI*/, const String& localName, const String& value)
    136 {
    137     // FIXME: namespace support?
    138     // should make a QualifiedName here but we'd have to expose the impl
    139     m_parameters.set(localName, value);
    140 }
    141 
    142 String XSLTProcessor::getParameter(const String& /*namespaceURI*/, const String& localName) const
    143 {
    144     // FIXME: namespace support?
    145     // should make a QualifiedName here but we'd have to expose the impl
    146     return m_parameters.get(localName);
    147 }
    148 
    149 void XSLTProcessor::removeParameter(const String& /*namespaceURI*/, const String& localName)
    150 {
    151     // FIXME: namespace support?
    152     m_parameters.remove(localName);
    153 }
    154 
    155 void XSLTProcessor::reset()
    156 {
    157     m_stylesheet.clear();
    158     m_stylesheetRootNode.clear();
    159     m_parameters.clear();
    160 }
    161 
    162 void XSLTProcessor::trace(Visitor* visitor)
    163 {
    164     visitor->trace(m_stylesheet);
    165     visitor->trace(m_stylesheetRootNode);
    166 }
    167 
    168 } // namespace WebCore
    169