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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 "core/css/StyleSheet.h"
     27 #include "core/dom/ProcessingInstruction.h"
     28 #include "platform/RuntimeEnabledFeatures.h"
     29 #include "wtf/PassRefPtr.h"
     30 #include <libxml/tree.h>
     31 #include <libxslt/transform.h>
     32 
     33 namespace blink {
     34 
     35 class ResourceFetcher;
     36 class XSLImportRule;
     37 
     38 class XSLStyleSheet FINAL : public StyleSheet {
     39 public:
     40     static PassRefPtrWillBeRawPtr<XSLStyleSheet> create(XSLImportRule* parentImport, const String& originalURL, const KURL& finalURL)
     41     {
     42         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
     43         return adoptRefWillBeNoop(new XSLStyleSheet(parentImport, originalURL, finalURL));
     44     }
     45     static PassRefPtrWillBeRawPtr<XSLStyleSheet> create(ProcessingInstruction* parentNode, const String& originalURL, const KURL& finalURL)
     46     {
     47         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
     48         return adoptRefWillBeNoop(new XSLStyleSheet(parentNode, originalURL, finalURL, false));
     49     }
     50     static PassRefPtrWillBeRawPtr<XSLStyleSheet> createEmbedded(ProcessingInstruction* parentNode, const KURL& finalURL)
     51     {
     52         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
     53         return adoptRefWillBeNoop(new XSLStyleSheet(parentNode, finalURL.string(), finalURL, true));
     54     }
     55 
     56     // Taking an arbitrary node is unsafe, because owner node pointer can become
     57     // stale. XSLTProcessor ensures that the stylesheet doesn't outlive its
     58     // parent, in part by not exposing it to JavaScript.
     59     static PassRefPtrWillBeRawPtr<XSLStyleSheet> createForXSLTProcessor(Document* document, Node* stylesheetRootNode, const String& originalURL, const KURL& finalURL)
     60     {
     61         ASSERT(RuntimeEnabledFeatures::xsltEnabled());
     62         return adoptRefWillBeNoop(new XSLStyleSheet(document, stylesheetRootNode, 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*);
     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 = nullptr; }
     99     virtual KURL baseURL() const OVERRIDE { return m_finalURL; }
    100     virtual bool isLoading() const OVERRIDE;
    101 
    102     virtual void trace(Visitor*) OVERRIDE;
    103 
    104 private:
    105     XSLStyleSheet(Node* parentNode, const String& originalURL, const KURL& finalURL, bool embedded);
    106     XSLStyleSheet(Document* ownerDocument, Node* styleSheetRootNode, const String& originalURL, const KURL& finalURL, bool embedded);
    107     XSLStyleSheet(XSLImportRule* parentImport, const String& originalURL, const KURL& finalURL);
    108 
    109     RawPtrWillBeMember<Node> m_ownerNode;
    110     String m_originalURL;
    111     KURL m_finalURL;
    112     bool m_isDisabled;
    113 
    114     WillBeHeapVector<OwnPtrWillBeMember<XSLImportRule> > m_children;
    115 
    116     bool m_embedded;
    117     bool m_processed;
    118 
    119     xmlDocPtr m_stylesheetDoc;
    120     bool m_stylesheetDocTaken;
    121     bool m_compilationFailed;
    122 
    123     RawPtrWillBeMember<XSLStyleSheet> m_parentStyleSheet;
    124     RefPtrWillBeMember<Document> m_ownerDocument;
    125 };
    126 
    127 DEFINE_TYPE_CASTS(XSLStyleSheet, StyleSheet, sheet, !sheet->isCSSStyleSheet(), !sheet.isCSSStyleSheet());
    128 
    129 } // namespace blink
    130 
    131 #endif // XSLStyleSheet_h
    132