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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 // TODO(ahe): Orignially copied from sdk/pkg/compiler/lib/src/colors.dart, | 5 // TODO(ahe): Orignially copied from sdk/pkg/compiler/lib/src/colors.dart, |
6 // merge these two packages. | 6 // merge these two packages. |
7 library colors; | 7 library colors; |
8 | 8 |
9 import 'dart:convert' show JSON; | 9 import 'dart:convert' show JSON; |
10 | 10 |
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91 String white(String string) => wrap(string, WHITE_COLOR); | 91 String white(String string) => wrap(string, WHITE_COLOR); |
92 | 92 |
93 /// True if we should enable colors in output. We enable colors when: | 93 /// True if we should enable colors in output. We enable colors when: |
94 /// 1. stdout and stderr are terminals, | 94 /// 1. stdout and stderr are terminals, |
95 /// 2. the terminal supports more than 8 colors, and | 95 /// 2. the terminal supports more than 8 colors, and |
96 /// 3. the terminal's ANSI color codes matches what we expect. | 96 /// 3. the terminal's ANSI color codes matches what we expect. |
97 /// | 97 /// |
98 /// Note: do not call this method directly, as it is expensive to | 98 /// Note: do not call this method directly, as it is expensive to |
99 /// compute. Instead, use [CompilerContext.enableColors]. | 99 /// compute. Instead, use [CompilerContext.enableColors]. |
100 bool computeEnableColors(CompilerContext context) { | 100 bool computeEnableColors(CompilerContext context) { |
101 if (!Platform.ansiSupported) { | 101 bool ansiSupported; |
| 102 try { |
| 103 ansiSupported = Platform.ansiSupported; |
| 104 } on NoSuchMethodError catch (e) { |
| 105 // Ignored: We're running on an older version of the Dart VM which doesn't |
| 106 // implement `ansiSupported`. |
| 107 } |
| 108 if (ansiSupported == false) { |
102 if (context.options.verbose) { | 109 if (context.options.verbose) { |
103 print("Not enabling colors, 'Platform.ansiSupported' is false."); | 110 print("Not enabling colors, 'Platform.ansiSupported' is false."); |
104 } | 111 } |
105 return false; | 112 return false; |
106 } | 113 } |
107 | 114 |
108 if (stdioType(stderr) != StdioType.TERMINAL) { | 115 if (stdioType(stderr) != StdioType.TERMINAL) { |
109 if (context.options.verbose) { | 116 if (context.options.verbose) { |
110 print("Not enabling colors, stderr isn't a terminal."); | 117 print("Not enabling colors, stderr isn't a terminal."); |
111 } | 118 } |
112 return false; | 119 return false; |
113 } | 120 } |
114 | 121 |
115 if (stdioType(stdout) != StdioType.TERMINAL) { | 122 if (stdioType(stdout) != StdioType.TERMINAL) { |
116 if (context.options.verbose) { | 123 if (context.options.verbose) { |
117 print("Not enabling colors, stdout isn't a terminal."); | 124 print("Not enabling colors, stdout isn't a terminal."); |
118 } | 125 } |
119 return false; | 126 return false; |
120 } | 127 } |
121 | 128 |
122 if (Platform.isWindows) { | 129 if (ansiSupported == true && Platform.isWindows) { |
123 if (context.options.verbose) { | 130 if (context.options.verbose) { |
124 print("Enabling colors as OS is Windows."); | 131 print("Enabling colors as OS is Windows."); |
125 } | 132 } |
126 return true; | 133 return true; |
127 } | 134 } |
128 | 135 |
129 // We have to check if the terminal actually supports colors. Currently, | 136 // We have to check if the terminal actually supports colors. Currently, |
130 // `Platform.ansiSupported` is hard-coded to true on non-Windows platforms. | 137 // `Platform.ansiSupported` is hard-coded to true on non-Windows platforms. |
131 | 138 |
132 // The `-S` option of `tput` allows us to query multiple capabilities at | 139 // The `-S` option of `tput` allows us to query multiple capabilities at |
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167 "${JSON.encode(ALL_CODES)} != ${JSON.encode(allCodes)}."); | 174 "${JSON.encode(ALL_CODES)} != ${JSON.encode(allCodes)}."); |
168 } | 175 } |
169 return false; | 176 return false; |
170 } | 177 } |
171 | 178 |
172 if (context.options.verbose) { | 179 if (context.options.verbose) { |
173 print("Enabling colors."); | 180 print("Enabling colors."); |
174 } | 181 } |
175 return true; | 182 return true; |
176 } | 183 } |
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