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 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         {

    45         }

    46 

    47         SourceCode(PassRefPtr<SourceProvider> provider, int firstLine = 1)

    48             : m_provider(provider)

    49             , m_startChar(0)

    50             , m_endChar(m_provider->length())

    51             , m_firstLine(std::max(firstLine, 1))

    52         {

    53         }

    54 

    55         SourceCode(PassRefPtr<SourceProvider> provider, int start, int end, int firstLine)

    56             : m_provider(provider)

    57             , m_startChar(start)

    58             , m_endChar(end)

    59             , m_firstLine(std::max(firstLine, 1))

    60         {

    61         }

    62 

    63         UString toString() const

    64         {

    65             if (!m_provider)

    66                 return UString();

    67             return m_provider->getRange(m_startChar, m_endChar);

    68         }

    69         

    70         bool isNull() const { return !m_provider; }

    71         SourceProvider* provider() const { return m_provider.get(); }

    72         int firstLine() const { return m_firstLine; }

    73         int startOffset() const { return m_startChar; }

    74         int endOffset() const { return m_endChar; }

    75         const UChar* data() const { return m_provider->data() + m_startChar; }

    76         int length() const { return m_endChar - m_startChar; }

    77 

    78     private:

    79         RefPtr<SourceProvider> m_provider;

    80         int m_startChar;

    81         int m_endChar;

    82         int m_firstLine;

    83     };

    84 

    85     inline SourceCode makeSource(const UString& source, const UString& url = UString(), int firstLine = 1)

    86     {

    87         return SourceCode(UStringSourceProvider::create(source, url), firstLine);

    88     }

    89 

    90 } // namespace JSC

    91 

    92 #endif // SourceCode_h