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annotate sat_frontends/tools/css_color.py @ 2771:003b8b4b56a7

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date update
author Goffi <goffi@goffi.org>
date Sat, 12 Jan 2019 12:25:31 +0100
parents 56f94936df1e
children ab2696e34d29
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # CSS color parsing
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5 # Copyright (C) 2009-2019 Jérome-Poisson
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from sat.core.log import getLogger
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21
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22 log = getLogger(__name__)
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25 CSS_COLORS = {
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26 u"black": u"000000",
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27 u"silver": u"c0c0c0",
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28 u"gray": u"808080",
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29 u"white": u"ffffff",
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30 u"maroon": u"800000",
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31 u"red": u"ff0000",
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32 u"purple": u"800080",
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33 u"fuchsia": u"ff00ff",
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34 u"green": u"008000",
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35 u"lime": u"00ff00",
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36 u"olive": u"808000",
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37 u"yellow": u"ffff00",
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38 u"navy": u"000080",
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39 u"blue": u"0000ff",
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40 u"teal": u"008080",
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41 u"aqua": u"00ffff",
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42 u"orange": u"ffa500",
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43 u"aliceblue": u"f0f8ff",
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44 u"antiquewhite": u"faebd7",
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45 u"aquamarine": u"7fffd4",
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46 u"azure": u"f0ffff",
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47 u"beige": u"f5f5dc",
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48 u"bisque": u"ffe4c4",
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49 u"blanchedalmond": u"ffebcd",
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50 u"blueviolet": u"8a2be2",
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51 u"brown": u"a52a2a",
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52 u"burlywood": u"deb887",
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53 u"cadetblue": u"5f9ea0",
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54 u"chartreuse": u"7fff00",
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55 u"chocolate": u"d2691e",
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56 u"coral": u"ff7f50",
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57 u"cornflowerblue": u"6495ed",
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58 u"cornsilk": u"fff8dc",
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59 u"crimson": u"dc143c",
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60 u"darkblue": u"00008b",
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61 u"darkcyan": u"008b8b",
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62 u"darkgoldenrod": u"b8860b",
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63 u"darkgray": u"a9a9a9",
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64 u"darkgreen": u"006400",
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65 u"darkgrey": u"a9a9a9",
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66 u"darkkhaki": u"bdb76b",
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67 u"darkmagenta": u"8b008b",
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68 u"darkolivegreen": u"556b2f",
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69 u"darkorange": u"ff8c00",
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70 u"darkorchid": u"9932cc",
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71 u"darkred": u"8b0000",
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72 u"darksalmon": u"e9967a",
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73 u"darkseagreen": u"8fbc8f",
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74 u"darkslateblue": u"483d8b",
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75 u"darkslategray": u"2f4f4f",
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76 u"darkslategrey": u"2f4f4f",
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77 u"darkturquoise": u"00ced1",
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78 u"darkviolet": u"9400d3",
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79 u"deeppink": u"ff1493",
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80 u"deepskyblue": u"00bfff",
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81 u"dimgray": u"696969",
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82 u"dimgrey": u"696969",
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83 u"dodgerblue": u"1e90ff",
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84 u"firebrick": u"b22222",
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85 u"floralwhite": u"fffaf0",
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86 u"forestgreen": u"228b22",
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87 u"gainsboro": u"dcdcdc",
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88 u"ghostwhite": u"f8f8ff",
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89 u"gold": u"ffd700",
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90 u"goldenrod": u"daa520",
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91 u"greenyellow": u"adff2f",
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92 u"grey": u"808080",
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93 u"honeydew": u"f0fff0",
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94 u"hotpink": u"ff69b4",
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95 u"indianred": u"cd5c5c",
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96 u"indigo": u"4b0082",
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97 u"ivory": u"fffff0",
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98 u"khaki": u"f0e68c",
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99 u"lavender": u"e6e6fa",
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100 u"lavenderblush": u"fff0f5",
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101 u"lawngreen": u"7cfc00",
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102 u"lemonchiffon": u"fffacd",
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103 u"lightblue": u"add8e6",
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104 u"lightcoral": u"f08080",
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105 u"lightcyan": u"e0ffff",
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106 u"lightgoldenrodyellow": u"fafad2",
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107 u"lightgray": u"d3d3d3",
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108 u"lightgreen": u"90ee90",
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109 u"lightgrey": u"d3d3d3",
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110 u"lightpink": u"ffb6c1",
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111 u"lightsalmon": u"ffa07a",
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112 u"lightseagreen": u"20b2aa",
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113 u"lightskyblue": u"87cefa",
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114 u"lightslategray": u"778899",
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115 u"lightslategrey": u"778899",
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116 u"lightsteelblue": u"b0c4de",
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117 u"lightyellow": u"ffffe0",
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118 u"limegreen": u"32cd32",
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119 u"linen": u"faf0e6",
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120 u"mediumaquamarine": u"66cdaa",
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121 u"mediumblue": u"0000cd",
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122 u"mediumorchid": u"ba55d3",
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123 u"mediumpurple": u"9370db",
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124 u"mediumseagreen": u"3cb371",
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125 u"mediumslateblue": u"7b68ee",
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126 u"mediumspringgreen": u"00fa9a",
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127 u"mediumturquoise": u"48d1cc",
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128 u"mediumvioletred": u"c71585",
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129 u"midnightblue": u"191970",
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130 u"mintcream": u"f5fffa",
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131 u"mistyrose": u"ffe4e1",
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132 u"moccasin": u"ffe4b5",
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133 u"navajowhite": u"ffdead",
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134 u"oldlace": u"fdf5e6",
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135 u"olivedrab": u"6b8e23",
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136 u"orangered": u"ff4500",
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137 u"orchid": u"da70d6",
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138 u"palegoldenrod": u"eee8aa",
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139 u"palegreen": u"98fb98",
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140 u"paleturquoise": u"afeeee",
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141 u"palevioletred": u"db7093",
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142 u"papayawhip": u"ffefd5",
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143 u"peachpuff": u"ffdab9",
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144 u"peru": u"cd853f",
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145 u"pink": u"ffc0cb",
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146 u"plum": u"dda0dd",
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147 u"powderblue": u"b0e0e6",
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148 u"rosybrown": u"bc8f8f",
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149 u"royalblue": u"4169e1",
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150 u"saddlebrown": u"8b4513",
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151 u"salmon": u"fa8072",
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152 u"sandybrown": u"f4a460",
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153 u"seagreen": u"2e8b57",
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154 u"seashell": u"fff5ee",
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155 u"sienna": u"a0522d",
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156 u"skyblue": u"87ceeb",
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157 u"slateblue": u"6a5acd",
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158 u"slategray": u"708090",
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159 u"slategrey": u"708090",
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160 u"snow": u"fffafa",
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161 u"springgreen": u"00ff7f",
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162 u"steelblue": u"4682b4",
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163 u"tan": u"d2b48c",
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164 u"thistle": u"d8bfd8",
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165 u"tomato": u"ff6347",
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166 u"turquoise": u"40e0d0",
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167 u"violet": u"ee82ee",
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168 u"wheat": u"f5deb3",
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169 u"whitesmoke": u"f5f5f5",
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170 u"yellowgreen": u"9acd32",
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171 u"rebeccapurple": u"663399",
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172 }
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173 DEFAULT = u"000000"
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174
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175
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176 def parse(raw_value, as_string=True):
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177 """parse CSS color value and return normalised value
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178
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179 @param raw_value(unicode): CSS value
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180 @param as_string(bool): if True return a string,
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181 else return a tuple of int
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182 @return (unicode, tuple): normalised value
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183 if as_string is True, value is 3 or 4 hex words (e.g. u"ff00aabb")
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184 else value is a 3 or 4 tuple of int (e.g.: (255, 0, 170, 187)).
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185 If present, the 4th value is the alpha channel
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186 If value can't be parsed, a warning message is logged, and DEFAULT is returned
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187 """
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188 raw_value = raw_value.strip().lower()
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189 if raw_value.startswith(u"#"):
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190 # we have a hexadecimal value
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191 str_value = raw_value[1:]
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192 if len(raw_value) in (3, 4):
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193 str_value = u"".join([2 * v for v in str_value])
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194 elif raw_value.startswith(u"rgb"):
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195 left_p = raw_value.find(u"(")
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196 right_p = raw_value.find(u")")
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197 rgb_values = [v.strip() for v in raw_value[left_p + 1 : right_p].split(",")]
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198 expected_len = 4 if raw_value.startswith(u"rgba") else 3
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199 if len(rgb_values) != expected_len:
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200 log.warning(u"incorrect value: {}".format(raw_value))
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201 str_value = DEFAULT
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202 else:
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203 int_values = []
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204 for rgb_v in rgb_values:
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205 p_idx = rgb_v.find(u"%")
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206 if p_idx == -1:
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207 # base 10 value
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208 try:
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209 int_v = int(rgb_v)
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210 if int_v > 255:
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211 raise ValueError(u"value exceed 255")
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212 int_values.append(int_v)
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213 except ValueError:
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214 log.warning(u"invalid int: {}".format(rgb_v))
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215 int_values.append(0)
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216 else:
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Goffi <goffi@goffi.org>
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217 # percentage
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Goffi <goffi@goffi.org>
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218 try:
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219 int_v = int(int(rgb_v[:p_idx]) / 100.0 * 255)
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220 if int_v > 255:
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221 raise ValueError(u"value exceed 255")
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222 int_values.append(int_v)
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diff changeset
223 except ValueError:
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224 log.warning(u"invalid percent value: {}".format(rgb_v))
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225 int_values.append(0)
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226 str_value = u"".join([u"{:02x}".format(v) for v in int_values])
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227 elif raw_value.startswith(u"hsl"):
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228 log.warning(u"hue-saturation-lightness not handled yet") # TODO
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229 str_value = DEFAULT
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230 else:
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Goffi <goffi@goffi.org>
parents:
diff changeset
231 try:
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232 str_value = CSS_COLORS[raw_value]
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Goffi <goffi@goffi.org>
parents:
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233 except KeyError:
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234 log.warning(u"unrecognised format: {}".format(raw_value))
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235 str_value = DEFAULT
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236
95ad70ad815c frontends (tools): added a module to parse CSS colors
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237 if as_string:
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238 return str_value
95ad70ad815c frontends (tools): added a module to parse CSS colors
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parents:
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239 else:
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240 return tuple(
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241 [
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242 int(str_value[i] + str_value[i + 1], 16)
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243 for i in xrange(0, len(str_value), 2)
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244 ]
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245 )