parser/SourceCode.h

   1 /*
   2  * Copyright (C) 2008, 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 SourceCode_h
  30 #define SourceCode_h
  31
  32 #include "SourceProvider.h"
  33 #include <wtf/RefPtr.h>
  34
  35 namespace JSC {
  36
  37     class SourceCode {
  38     public:
  39         SourceCode()
  40             : m_provider(0)
  41             , m_startChar(0)
  42             , m_endChar(0)
  43             , m_firstLine(0)
  44             , m_startColumn(0)
  45         {
  46         }
  47
  48         SourceCode(WTF::HashTableDeletedValueType)
  49             : m_provider(WTF::HashTableDeletedValue)
  50         {
  51         }
  52
  53         SourceCode(PassRefPtr<SourceProvider> provider)
  54             : m_provider(provider)
  55             , m_startChar(0)
  56             , m_endChar(m_provider->source().length())
  57             , m_firstLine(1)
  58             , m_startColumn(1)
  59         {
  60         }
  61
  62         SourceCode(PassRefPtr<SourceProvider> provider, int firstLine, int startColumn)
  63             : m_provider(provider)
  64             , m_startChar(0)
  65             , m_endChar(m_provider->source().length())
  66             , m_firstLine(std::max(firstLine, 1))
  67             , m_startColumn(std::max(startColumn, 1))
  68         {
  69         }
  70
  71         SourceCode(PassRefPtr<SourceProvider> provider, int start, int end, int firstLine, int startColumn)
  72             : m_provider(provider)
  73             , m_startChar(start)
  74             , m_endChar(end)
  75             , m_firstLine(std::max(firstLine, 1))
  76             , m_startColumn(std::max(startColumn, 1))
  77         {
  78         }
  79
  80         bool isHashTableDeletedValue() const { return m_provider.isHashTableDeletedValue(); }
  81
  82         String toString() const
  83         {
  84             if (!m_provider)
  85                 return String();
  86             return m_provider->getRange(m_startChar, m_endChar);
  87         }
  88
  89         CString toUTF8() const;
  90
  91         intptr_t providerID() const
  92         {
  93             if (!m_provider)
  94                 return SourceProvider::nullID;
  95             return m_provider->asID();
  96         }
  97
  98         bool isNull() const { return !m_provider; }
  99         SourceProvider* provider() const { return m_provider.get(); }
 100         int firstLine() const { return m_firstLine; }
 101         int startColumn() const { return m_startColumn; }
 102         int startOffset() const { return m_startChar; }
 103         int endOffset() const { return m_endChar; }
 104         int length() const { return m_endChar - m_startChar; }
 105
 106         SourceCode subExpression(unsigned openBrace, unsigned closeBrace, int firstLine, int startColumn);
 107
 108     private:
 109         RefPtr<SourceProvider> m_provider;
 110         int m_startChar;
 111         int m_endChar;
 112         int m_firstLine;
 113         int m_startColumn;
 114     };
 115
 116     inline SourceCode makeSource(const String& source, const String& url = String(), const TextPosition& startPosition = TextPosition::minimumPosition())
 117     {
 118         return SourceCode(StringSourceProvider::create(source, url, startPosition), startPosition.m_line.oneBasedInt(), startPosition.m_column.oneBasedInt());
 119     }
 120
 121     inline SourceCode SourceCode::subExpression(unsigned openBrace, unsigned closeBrace, int firstLine, int startColumn)
 122     {
 123         ASSERT(provider()->source()[openBrace] == '{');
 124         ASSERT(provider()->source()[closeBrace] == '}');
 125         startColumn += 1; // Convert to base 1.
 126         return SourceCode(provider(), openBrace, closeBrace + 1, firstLine, startColumn);
 127     }
 128
 129 } // namespace JSC
 130
 131 #endif // SourceCode_h