parser/SourceProvider.h

   1 /*
   2  * Copyright (C) 2008 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 Computer, 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 "UString.h"
  33 #include <wtf/RefCounted.h>
  34
  35 namespace JSC {
  36
  37     class SourceProvider : public RefCounted<SourceProvider> {
  38     public:
  39         SourceProvider(const UString& url)
  40             : m_url(url)
  41         {
  42         }
  43         virtual ~SourceProvider() { }
  44
  45         virtual UString getRange(int start, int end) const = 0;
  46         virtual const UChar* data() const = 0;
  47         virtual int length() const = 0;
  48
  49         const UString& url() { return m_url; }
  50         intptr_t asID() { return reinterpret_cast<intptr_t>(this); }
  51
  52     private:
  53         UString m_url;
  54     };
  55
  56     class UStringSourceProvider : public SourceProvider {
  57     public:
  58         static PassRefPtr<UStringSourceProvider> create(const UString& source, const UString& url)
  59         {
  60             return adoptRef(new UStringSourceProvider(source, url));
  61         }
  62
  63         UString getRange(int start, int end) const { return m_source.substr(start, end - start); }
  64         const UChar* data() const { return m_source.data(); }
  65         int length() const { return m_source.size(); }
  66
  67     private:
  68         UStringSourceProvider(const UString& source, const UString& url)
  69             : SourceProvider(url)
  70             , m_source(source)
  71         {
  72         }
  73
  74         UString m_source;
  75     };
  76
  77 } // namespace JSC
  78
  79 #endif // SourceProvider_h