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1 // | 1 // |
2 // Copyright 2014 Google Inc. All rights reserved. | 2 // Copyright 2014 Google Inc. All rights reserved. |
3 // | 3 // |
4 // Use of this source code is governed by a BSD-style | 4 // Use of this source code is governed by a BSD-style |
5 // license that can be found in the LICENSE file or at | 5 // license that can be found in the LICENSE file or at |
6 // https://developers.google.com/open-source/licenses/bsd | 6 // https://developers.google.com/open-source/licenses/bsd |
7 // | 7 // |
8 | 8 |
9 /// Provides a way to measure rendered text width for clipping | 9 /// Provides a way to measure rendered text width for clipping |
10 /// text on tooltips and ticks when they are too long. | 10 /// text on tooltips and ticks when they are too long. |
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93 width = width - ellipsis; | 93 width = width - ellipsis; |
94 while (max >= min) { | 94 while (max >= min) { |
95 mid = (min + max) ~/ 2; | 95 mid = (min + max) ~/ 2; |
96 position = indices[mid]; | 96 position = indices[mid]; |
97 if (context.measureText(text.substring(0, position)).width > width) { | 97 if (context.measureText(text.substring(0, position)).width > width) { |
98 max = mid - 1; | 98 max = mid - 1; |
99 } else { | 99 } else { |
100 min = mid + 1; | 100 min = mid + 1; |
101 } | 101 } |
102 } | 102 } |
| 103 if (max < 0) max = 0; |
103 text = text.substring(0, indices[max]) + '…'; | 104 text = text.substring(0, indices[max]) + '…'; |
104 } | 105 } |
105 return text; | 106 return text; |
106 } | 107 } |
107 | 108 |
108 /// Truncates text in the given [element], which is either a [SvgTextElement] | 109 /// Truncates text in the given [element], which is either a [SvgTextElement] |
109 /// or a [SvgTspanElement] to fit in [width]. Appends an ellipsis to the text | 110 /// or a [SvgTspanElement] to fit in [width]. Appends an ellipsis to the text |
110 /// if it had to be truncated. | 111 /// if it had to be truncated. |
111 /// Calling this method may force a layout on the document. For better | 112 /// Calling this method may force a layout on the document. For better |
112 /// performance, use [TextMetrics.ellipsizeText]. | 113 /// performance, use [TextMetrics.ellipsizeText]. |
113 static ellipsizeTextElement() {} | 114 static ellipsizeTextElement() {} |
114 } | 115 } |
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