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Side by Side Diff: Source/platform/text/StringTruncator.cpp

Issue 1119663002: Making Unicode character names consistent (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master
Patch Set: Rebase patch Created 5 years, 7 months ago
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1 /* 1 /*
2 * Copyright (C) 2005, 2006, 2007 Apple Inc. All rights reserved. 2 * Copyright (C) 2005, 2006, 2007 Apple 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 * 7 *
8 * 1. Redistributions of source code must retain the above copyright 8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer. 9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright 10 * 2. Redistributions in binary form must reproduce the above copyright
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63 63
64 unsigned omitStart = (keepCount + 1) / 2; 64 unsigned omitStart = (keepCount + 1) / 2;
65 NonSharedCharacterBreakIterator it(string); 65 NonSharedCharacterBreakIterator it(string);
66 unsigned omitEnd = boundedTextBreakFollowing(it, omitStart + (length - keepC ount) - 1, length); 66 unsigned omitEnd = boundedTextBreakFollowing(it, omitStart + (length - keepC ount) - 1, length);
67 omitStart = textBreakAtOrPreceding(it, omitStart); 67 omitStart = textBreakAtOrPreceding(it, omitStart);
68 68
69 unsigned truncatedLength = omitStart + 1 + (length - omitEnd); 69 unsigned truncatedLength = omitStart + 1 + (length - omitEnd);
70 ASSERT(truncatedLength <= length); 70 ASSERT(truncatedLength <= length);
71 71
72 string.copyTo(buffer, 0, omitStart); 72 string.copyTo(buffer, 0, omitStart);
73 buffer[omitStart] = horizontalEllipsis; 73 buffer[omitStart] = horizontalEllipsisCharacter;
74 string.copyTo(&buffer[omitStart + 1], omitEnd, length - omitEnd); 74 string.copyTo(&buffer[omitStart + 1], omitEnd, length - omitEnd);
75 75
76 return truncatedLength; 76 return truncatedLength;
77 } 77 }
78 78
79 static unsigned rightTruncateToBuffer(const String& string, unsigned length, uns igned keepCount, UChar* buffer) 79 static unsigned rightTruncateToBuffer(const String& string, unsigned length, uns igned keepCount, UChar* buffer)
80 { 80 {
81 ASSERT(keepCount < length); 81 ASSERT(keepCount < length);
82 ASSERT(keepCount < STRING_BUFFER_SIZE); 82 ASSERT(keepCount < STRING_BUFFER_SIZE);
83 83
84 NonSharedCharacterBreakIterator it(string); 84 NonSharedCharacterBreakIterator it(string);
85 unsigned keepLength = textBreakAtOrPreceding(it, keepCount); 85 unsigned keepLength = textBreakAtOrPreceding(it, keepCount);
86 unsigned truncatedLength = keepLength + 1; 86 unsigned truncatedLength = keepLength + 1;
87 87
88 string.copyTo(buffer, 0, keepLength); 88 string.copyTo(buffer, 0, keepLength);
89 buffer[keepLength] = horizontalEllipsis; 89 buffer[keepLength] = horizontalEllipsisCharacter;
90 90
91 return truncatedLength; 91 return truncatedLength;
92 } 92 }
93 93
94 static float stringWidth(const Font& renderer, const String& string) 94 static float stringWidth(const Font& renderer, const String& string)
95 { 95 {
96 TextRun run(string); 96 TextRun run(string);
97 return renderer.width(run); 97 return renderer.width(run);
98 } 98 }
99 99
100 static float stringWidth(const Font& renderer, const UChar* characters, unsigned length) 100 static float stringWidth(const Font& renderer, const UChar* characters, unsigned length)
101 { 101 {
102 TextRun run(characters, length); 102 TextRun run(characters, length);
103 return renderer.width(run); 103 return renderer.width(run);
104 } 104 }
105 105
106 static String truncateString(const String& string, float maxWidth, const Font& f ont, TruncationFunction truncateToBuffer) 106 static String truncateString(const String& string, float maxWidth, const Font& f ont, TruncationFunction truncateToBuffer)
107 { 107 {
108 if (string.isEmpty()) 108 if (string.isEmpty())
109 return string; 109 return string;
110 110
111 ASSERT(maxWidth >= 0); 111 ASSERT(maxWidth >= 0);
112 112
113 float currentEllipsisWidth = stringWidth(font, &horizontalEllipsis, 1); 113 float currentEllipsisWidth = stringWidth(font, &horizontalEllipsisCharacter, 1);
114 114
115 UChar stringBuffer[STRING_BUFFER_SIZE]; 115 UChar stringBuffer[STRING_BUFFER_SIZE];
116 unsigned truncatedLength; 116 unsigned truncatedLength;
117 unsigned keepCount; 117 unsigned keepCount;
118 unsigned length = string.length(); 118 unsigned length = string.length();
119 119
120 if (length > STRING_BUFFER_SIZE) { 120 if (length > STRING_BUFFER_SIZE) {
121 keepCount = STRING_BUFFER_SIZE - 1; // need 1 character for the ellipsis 121 keepCount = STRING_BUFFER_SIZE - 1; // need 1 character for the ellipsis
122 truncatedLength = centerTruncateToBuffer(string, length, keepCount, stri ngBuffer); 122 truncatedLength = centerTruncateToBuffer(string, length, keepCount, stri ngBuffer);
123 } else { 123 } else {
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192 { 192 {
193 return truncateString(string, maxWidth, font, rightTruncateToBuffer); 193 return truncateString(string, maxWidth, font, rightTruncateToBuffer);
194 } 194 }
195 195
196 float StringTruncator::width(const String& string, const Font& font) 196 float StringTruncator::width(const String& string, const Font& font)
197 { 197 {
198 return stringWidth(font, string); 198 return stringWidth(font, string);
199 } 199 }
200 200
201 } // namespace blink 201 } // namespace blink
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