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
35namespace 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
132