parser/SourceProvider.h

   1 /*
   2  * Copyright (C) 2008, 2009, 2012, 2013 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef SourceProvider_h
  30 #define SourceProvider_h
  31
  32 #include <wtf/PassOwnPtr.h>
  33 #include <wtf/RefCounted.h>
  34 #include <wtf/text/TextPosition.h>
  35 #include <wtf/text/WTFString.h>
  36
  37 namespace JSC {
  38
  39     class SourceProvider : public RefCounted<SourceProvider> {
  40     public:
  41         static const intptr_t nullID = 1;
  42
  43         JS_EXPORT_PRIVATE SourceProvider(const String& url, const TextPosition& startPosition);
  44
  45         JS_EXPORT_PRIVATE virtual ~SourceProvider();
  46
  47         virtual const String& source() const = 0;
  48         String getRange(int start, int end) const
  49         {
  50             return source().substringSharingImpl(start, end - start);
  51         }
  52
  53         const String& url() { return m_url; }
  54         TextPosition startPosition() const { return m_startPosition; }
  55         intptr_t asID()
  56         {
  57             ASSERT(this);
  58             if (!this) // Be defensive in release mode.
  59                 return nullID;
  60             if (!m_id)
  61                 getID();
  62             return m_id;
  63         }
  64
  65         bool isValid() const { return m_validated; }
  66         void setValid() { m_validated = true; }
  67
  68     private:
  69
  70         JS_EXPORT_PRIVATE void getID();
  71         Vector<size_t>& lineStarts();
  72
  73         String m_url;
  74         TextPosition m_startPosition;
  75         bool m_validated : 1;
  76         uintptr_t m_id : sizeof(uintptr_t) * 8 - 1;
  77     };
  78
  79     class StringSourceProvider : public SourceProvider {
  80     public:
  81         static PassRefPtr<StringSourceProvider> create(const String& source, const String& url, const TextPosition& startPosition = TextPosition::minimumPosition())
  82         {
  83             return adoptRef(new StringSourceProvider(source, url, startPosition));
  84         }
  85
  86         virtual const String& source() const override
  87         {
  88             return m_source;
  89         }
  90
  91     private:
  92         StringSourceProvider(const String& source, const String& url, const TextPosition& startPosition)
  93             : SourceProvider(url, startPosition)
  94             , m_source(source)
  95         {
  96         }
  97
  98         String m_source;
  99     };
 100
 101 } // namespace JSC
 102
 103 #endif // SourceProvider_h