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1 /* | 1 /* |
2 * Copyright (C) 2010, Google Inc. All rights reserved. | 2 * Copyright (C) 2010, Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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37 // call a first element '0' or '1' which makes integer type ambiguous. | 37 // call a first element '0' or '1' which makes integer type ambiguous. |
38 class OrdinalNumber { | 38 class OrdinalNumber { |
39 public: | 39 public: |
40 static OrdinalNumber fromZeroBasedInt(int zeroBasedInt) { return OrdinalNumb
er(zeroBasedInt); } | 40 static OrdinalNumber fromZeroBasedInt(int zeroBasedInt) { return OrdinalNumb
er(zeroBasedInt); } |
41 static OrdinalNumber fromOneBasedInt(int oneBasedInt) { return OrdinalNumber
(oneBasedInt - 1); } | 41 static OrdinalNumber fromOneBasedInt(int oneBasedInt) { return OrdinalNumber
(oneBasedInt - 1); } |
42 OrdinalNumber() : m_zeroBasedValue(0) { } | 42 OrdinalNumber() : m_zeroBasedValue(0) { } |
43 | 43 |
44 int zeroBasedInt() const { return m_zeroBasedValue; } | 44 int zeroBasedInt() const { return m_zeroBasedValue; } |
45 int oneBasedInt() const { return m_zeroBasedValue + 1; } | 45 int oneBasedInt() const { return m_zeroBasedValue + 1; } |
46 | 46 |
47 bool operator==(OrdinalNumber other) { return m_zeroBasedValue == other.m_ze
roBasedValue; } | 47 bool operator==(OrdinalNumber other) const { return m_zeroBasedValue == othe
r.m_zeroBasedValue; } |
48 bool operator!=(OrdinalNumber other) { return !((*this) == other); } | 48 bool operator!=(OrdinalNumber other) const { return !((*this) == other); } |
49 | 49 |
50 static OrdinalNumber first() { return OrdinalNumber(0); } | 50 static OrdinalNumber first() { return OrdinalNumber(0); } |
51 static OrdinalNumber beforeFirst() { return OrdinalNumber(-1); } | 51 static OrdinalNumber beforeFirst() { return OrdinalNumber(-1); } |
52 | 52 |
53 private: | 53 private: |
54 OrdinalNumber(int zeroBasedInt) : m_zeroBasedValue(zeroBasedInt) { } | 54 OrdinalNumber(int zeroBasedInt) : m_zeroBasedValue(zeroBasedInt) { } |
55 int m_zeroBasedValue; | 55 int m_zeroBasedValue; |
56 }; | 56 }; |
57 | 57 |
58 | 58 |
59 // TextPosition structure specifies coordinates within an text resource. It is u
sed mostly | 59 // TextPosition structure specifies coordinates within an text resource. It is u
sed mostly |
60 // for saving script source position. | 60 // for saving script source position. |
61 class TextPosition { | 61 class TextPosition { |
62 public: | 62 public: |
63 TextPosition(OrdinalNumber line, OrdinalNumber column) | 63 TextPosition(OrdinalNumber line, OrdinalNumber column) |
64 : m_line(line) | 64 : m_line(line) |
65 , m_column(column) | 65 , m_column(column) |
66 { | 66 { |
67 } | 67 } |
68 TextPosition() { } | 68 TextPosition() { } |
69 bool operator==(const TextPosition& other) { return m_line == other.m_line &
& m_column == other.m_column; } | 69 bool operator==(const TextPosition& other) const { return m_line == other.m_
line && m_column == other.m_column; } |
70 bool operator!=(const TextPosition& other) { return !((*this) == other); } | 70 bool operator!=(const TextPosition& other) const { return !((*this) == other
); } |
71 WTF_EXPORT OrdinalNumber toOffset(const Vector<unsigned>&); | 71 WTF_EXPORT OrdinalNumber toOffset(const Vector<unsigned>&); |
72 | 72 |
73 // A 'minimum' value of position, used as a default value. | 73 // A 'minimum' value of position, used as a default value. |
74 static TextPosition minimumPosition() { return TextPosition(OrdinalNumber::f
irst(), OrdinalNumber::first()); } | 74 static TextPosition minimumPosition() { return TextPosition(OrdinalNumber::f
irst(), OrdinalNumber::first()); } |
75 | 75 |
76 // A value with line value less than a minimum; used as an impossible positi
on. | 76 // A value with line value less than a minimum; used as an impossible positi
on. |
77 static TextPosition belowRangePosition() { return TextPosition(OrdinalNumber
::beforeFirst(), OrdinalNumber::beforeFirst()); } | 77 static TextPosition belowRangePosition() { return TextPosition(OrdinalNumber
::beforeFirst(), OrdinalNumber::beforeFirst()); } |
78 | 78 |
79 // A value corresponding to a position with given offset within text having
the specified line ending offsets. | 79 // A value corresponding to a position with given offset within text having
the specified line ending offsets. |
80 WTF_EXPORT static TextPosition fromOffsetAndLineEndings(unsigned, const Vect
or<unsigned>&); | 80 WTF_EXPORT static TextPosition fromOffsetAndLineEndings(unsigned, const Vect
or<unsigned>&); |
81 | 81 |
82 OrdinalNumber m_line; | 82 OrdinalNumber m_line; |
83 OrdinalNumber m_column; | 83 OrdinalNumber m_column; |
84 }; | 84 }; |
85 | 85 |
86 WTF_EXPORT PassOwnPtr<Vector<unsigned> > lineEndings(const String&); | 86 WTF_EXPORT PassOwnPtr<Vector<unsigned> > lineEndings(const String&); |
87 | 87 |
88 } // namespace WTF | 88 } // namespace WTF |
89 | 89 |
90 using WTF::OrdinalNumber; | 90 using WTF::OrdinalNumber; |
91 | 91 |
92 using WTF::TextPosition; | 92 using WTF::TextPosition; |
93 | 93 |
94 using WTF::lineEndings; | 94 using WTF::lineEndings; |
95 | 95 |
96 #endif // TextPosition_h | 96 #endif // TextPosition_h |
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