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      1 /*
      2  * This file is part of the XSL implementation.
      3  *
      4  * Copyright (C) 2004, 2006, 2008, 2012 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 
     23 #ifndef XSLStyleSheet_h
     24 #define XSLStyleSheet_h
     25 
     26 #include "RuntimeEnabledFeatures.h"
     27 #include "core/css/StyleSheet.h"
     28 #include "core/dom/ProcessingInstruction.h"
     29 #include "wtf/PassRefPtr.h"
     30 
     31 #include <libxml/tree.h>
     32 #include <libxslt/transform.h>
     33 
     34 namespace WebCore {
     35 
     36 class ResourceFetcher;
     37 class XSLImportRule;
     38 
     39 class XSLStyleSheet : public StyleSheet {
     40 public:
     41     static PassRefPtr<XSLStyleSheet> create(XSLImportRule* parentImport, const String& originalURL, const KURL& finalURL)
     42     {
     43         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
     44         return adoptRef(new XSLStyleSheet(parentImport, originalURL, finalURL));
     45     }
     46     static PassRefPtr<XSLStyleSheet> create(ProcessingInstruction* parentNode, const String& originalURL, const KURL& finalURL)
     47     {
     48         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
     49         return adoptRef(new XSLStyleSheet(parentNode, originalURL, finalURL, false));
     50     }
     51     static PassRefPtr<XSLStyleSheet> createEmbedded(ProcessingInstruction* parentNode, const KURL& finalURL)
     52     {
     53         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
     54         return adoptRef(new XSLStyleSheet(parentNode, finalURL.string(), finalURL, true));
     55     }
     56 
     57     // Taking an arbitrary node is unsafe, because owner node pointer can become stale.
     58     // XSLTProcessor ensures that the stylesheet doesn't outlive its parent, in part by not exposing it to JavaScript.
     59     static PassRefPtr<XSLStyleSheet> createForXSLTProcessor(Node* parentNode, const String& originalURL, const KURL& finalURL)
     60     {
     61         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
     62         return adoptRef(new XSLStyleSheet(parentNode, originalURL, finalURL, false));
     63     }
     64 
     65     virtual ~XSLStyleSheet();
     66 
     67     bool parseString(const String&);
     68 
     69     void checkLoaded();
     70 
     71     const KURL& finalURL() const { return m_finalURL; }
     72 
     73     void loadChildSheets();
     74     void loadChildSheet(const String& href);
     75 
     76     ResourceFetcher* fetcher();
     77 
     78     Document* ownerDocument();
     79     virtual XSLStyleSheet* parentStyleSheet() const OVERRIDE { return m_parentStyleSheet; }
     80     void setParentStyleSheet(XSLStyleSheet* parent);
     81 
     82     xmlDocPtr document();
     83     xsltStylesheetPtr compileStyleSheet();
     84     xmlDocPtr locateStylesheetSubResource(xmlDocPtr parentDoc, const xmlChar* uri);
     85 
     86     void clearDocuments();
     87 
     88     void markAsProcessed();
     89     bool processed() const { return m_processed; }
     90 
     91     virtual String type() const OVERRIDE { return "text/xml"; }
     92     virtual bool disabled() const OVERRIDE { return m_isDisabled; }
     93     virtual void setDisabled(bool b) OVERRIDE { m_isDisabled = b; }
     94     virtual Node* ownerNode() const OVERRIDE { return m_ownerNode; }
     95     virtual String href() const OVERRIDE { return m_originalURL; }
     96     virtual String title() const OVERRIDE { return emptyString(); }
     97 
     98     virtual void clearOwnerNode() OVERRIDE { m_ownerNode = 0; }
     99     virtual KURL baseURL() const OVERRIDE { return m_finalURL; }
    100     virtual bool isLoading() const OVERRIDE;
    101 
    102 private:
    103     XSLStyleSheet(Node* parentNode, const String& originalURL, const KURL& finalURL, bool embedded);
    104     XSLStyleSheet(XSLImportRule* parentImport, const String& originalURL, const KURL& finalURL);
    105 
    106     Node* m_ownerNode;
    107     String m_originalURL;
    108     KURL m_finalURL;
    109     bool m_isDisabled;
    110 
    111     Vector<OwnPtr<XSLImportRule> > m_children;
    112 
    113     bool m_embedded;
    114     bool m_processed;
    115 
    116     xmlDocPtr m_stylesheetDoc;
    117     bool m_stylesheetDocTaken;
    118     bool m_compilationFailed;
    119 
    120     XSLStyleSheet* m_parentStyleSheet;
    121 };
    122 
    123 DEFINE_TYPE_CASTS(XSLStyleSheet, StyleSheet, sheet, !sheet->isCSSStyleSheet(), !sheet.isCSSStyleSheet());
    124 
    125 } // namespace WebCore
    126 
    127 #endif // XSLStyleSheet_h
    128