Mercurial > libervia-backend
annotate libervia/frontends/tools/css_color.py @ 4177:0f1a4ffcd419
doc (cli/blog): Document new `--alt-link` option
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Tue, 05 Dec 2023 13:14:55 +0100 |
| parents | 26b7ed2817da |
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| rev | line source |
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| 3137 | 1 #!/usr/bin/env python3 |
| 2 | |
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3 |
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4 # CSS color parsing |
| 3479 | 5 # Copyright (C) 2009-2021 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 libervia.backend.core.log import getLogger |
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21 |
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22 log = getLogger(__name__) |
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23 |
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24 |
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25 CSS_COLORS = { |
| 3028 | 26 "black": "000000", |
| 27 "silver": "c0c0c0", | |
| 28 "gray": "808080", | |
| 29 "white": "ffffff", | |
| 30 "maroon": "800000", | |
| 31 "red": "ff0000", | |
| 32 "purple": "800080", | |
| 33 "fuchsia": "ff00ff", | |
| 34 "green": "008000", | |
| 35 "lime": "00ff00", | |
| 36 "olive": "808000", | |
| 37 "yellow": "ffff00", | |
| 38 "navy": "000080", | |
| 39 "blue": "0000ff", | |
| 40 "teal": "008080", | |
| 41 "aqua": "00ffff", | |
| 42 "orange": "ffa500", | |
| 43 "aliceblue": "f0f8ff", | |
| 44 "antiquewhite": "faebd7", | |
| 45 "aquamarine": "7fffd4", | |
| 46 "azure": "f0ffff", | |
| 47 "beige": "f5f5dc", | |
| 48 "bisque": "ffe4c4", | |
| 49 "blanchedalmond": "ffebcd", | |
| 50 "blueviolet": "8a2be2", | |
| 51 "brown": "a52a2a", | |
| 52 "burlywood": "deb887", | |
| 53 "cadetblue": "5f9ea0", | |
| 54 "chartreuse": "7fff00", | |
| 55 "chocolate": "d2691e", | |
| 56 "coral": "ff7f50", | |
| 57 "cornflowerblue": "6495ed", | |
| 58 "cornsilk": "fff8dc", | |
| 59 "crimson": "dc143c", | |
| 60 "darkblue": "00008b", | |
| 61 "darkcyan": "008b8b", | |
| 62 "darkgoldenrod": "b8860b", | |
| 63 "darkgray": "a9a9a9", | |
| 64 "darkgreen": "006400", | |
| 65 "darkgrey": "a9a9a9", | |
| 66 "darkkhaki": "bdb76b", | |
| 67 "darkmagenta": "8b008b", | |
| 68 "darkolivegreen": "556b2f", | |
| 69 "darkorange": "ff8c00", | |
| 70 "darkorchid": "9932cc", | |
| 71 "darkred": "8b0000", | |
| 72 "darksalmon": "e9967a", | |
| 73 "darkseagreen": "8fbc8f", | |
| 74 "darkslateblue": "483d8b", | |
| 75 "darkslategray": "2f4f4f", | |
| 76 "darkslategrey": "2f4f4f", | |
| 77 "darkturquoise": "00ced1", | |
| 78 "darkviolet": "9400d3", | |
| 79 "deeppink": "ff1493", | |
| 80 "deepskyblue": "00bfff", | |
| 81 "dimgray": "696969", | |
| 82 "dimgrey": "696969", | |
| 83 "dodgerblue": "1e90ff", | |
| 84 "firebrick": "b22222", | |
| 85 "floralwhite": "fffaf0", | |
| 86 "forestgreen": "228b22", | |
| 87 "gainsboro": "dcdcdc", | |
| 88 "ghostwhite": "f8f8ff", | |
| 89 "gold": "ffd700", | |
| 90 "goldenrod": "daa520", | |
| 91 "greenyellow": "adff2f", | |
| 92 "grey": "808080", | |
| 93 "honeydew": "f0fff0", | |
| 94 "hotpink": "ff69b4", | |
| 95 "indianred": "cd5c5c", | |
| 96 "indigo": "4b0082", | |
| 97 "ivory": "fffff0", | |
| 98 "khaki": "f0e68c", | |
| 99 "lavender": "e6e6fa", | |
| 100 "lavenderblush": "fff0f5", | |
| 101 "lawngreen": "7cfc00", | |
| 102 "lemonchiffon": "fffacd", | |
| 103 "lightblue": "add8e6", | |
| 104 "lightcoral": "f08080", | |
| 105 "lightcyan": "e0ffff", | |
| 106 "lightgoldenrodyellow": "fafad2", | |
| 107 "lightgray": "d3d3d3", | |
| 108 "lightgreen": "90ee90", | |
| 109 "lightgrey": "d3d3d3", | |
| 110 "lightpink": "ffb6c1", | |
| 111 "lightsalmon": "ffa07a", | |
| 112 "lightseagreen": "20b2aa", | |
| 113 "lightskyblue": "87cefa", | |
| 114 "lightslategray": "778899", | |
| 115 "lightslategrey": "778899", | |
| 116 "lightsteelblue": "b0c4de", | |
| 117 "lightyellow": "ffffe0", | |
| 118 "limegreen": "32cd32", | |
| 119 "linen": "faf0e6", | |
| 120 "mediumaquamarine": "66cdaa", | |
| 121 "mediumblue": "0000cd", | |
| 122 "mediumorchid": "ba55d3", | |
| 123 "mediumpurple": "9370db", | |
| 124 "mediumseagreen": "3cb371", | |
| 125 "mediumslateblue": "7b68ee", | |
| 126 "mediumspringgreen": "00fa9a", | |
| 127 "mediumturquoise": "48d1cc", | |
| 128 "mediumvioletred": "c71585", | |
| 129 "midnightblue": "191970", | |
| 130 "mintcream": "f5fffa", | |
| 131 "mistyrose": "ffe4e1", | |
| 132 "moccasin": "ffe4b5", | |
| 133 "navajowhite": "ffdead", | |
| 134 "oldlace": "fdf5e6", | |
| 135 "olivedrab": "6b8e23", | |
| 136 "orangered": "ff4500", | |
| 137 "orchid": "da70d6", | |
| 138 "palegoldenrod": "eee8aa", | |
| 139 "palegreen": "98fb98", | |
| 140 "paleturquoise": "afeeee", | |
| 141 "palevioletred": "db7093", | |
| 142 "papayawhip": "ffefd5", | |
| 143 "peachpuff": "ffdab9", | |
| 144 "peru": "cd853f", | |
| 145 "pink": "ffc0cb", | |
| 146 "plum": "dda0dd", | |
| 147 "powderblue": "b0e0e6", | |
| 148 "rosybrown": "bc8f8f", | |
| 149 "royalblue": "4169e1", | |
| 150 "saddlebrown": "8b4513", | |
| 151 "salmon": "fa8072", | |
| 152 "sandybrown": "f4a460", | |
| 153 "seagreen": "2e8b57", | |
| 154 "seashell": "fff5ee", | |
| 155 "sienna": "a0522d", | |
| 156 "skyblue": "87ceeb", | |
| 157 "slateblue": "6a5acd", | |
| 158 "slategray": "708090", | |
| 159 "slategrey": "708090", | |
| 160 "snow": "fffafa", | |
| 161 "springgreen": "00ff7f", | |
| 162 "steelblue": "4682b4", | |
| 163 "tan": "d2b48c", | |
| 164 "thistle": "d8bfd8", | |
| 165 "tomato": "ff6347", | |
| 166 "turquoise": "40e0d0", | |
| 167 "violet": "ee82ee", | |
| 168 "wheat": "f5deb3", | |
| 169 "whitesmoke": "f5f5f5", | |
| 170 "yellowgreen": "9acd32", | |
| 171 "rebeccapurple": "663399", | |
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172 } |
| 3028 | 173 DEFAULT = "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() |
| 3028 | 189 if raw_value.startswith("#"): |
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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): |
| 3028 | 193 str_value = "".join([2 * v for v in str_value]) |
| 194 elif raw_value.startswith("rgb"): | |
| 195 left_p = raw_value.find("(") | |
| 196 right_p = raw_value.find(")") | |
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197 rgb_values = [v.strip() for v in raw_value[left_p + 1 : right_p].split(",")] |
| 3028 | 198 expected_len = 4 if raw_value.startswith("rgba") else 3 |
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199 if len(rgb_values) != expected_len: |
| 3028 | 200 log.warning("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: |
| 3028 | 205 p_idx = rgb_v.find("%") |
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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: |
| 3028 | 211 raise ValueError("value exceed 255") |
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212 int_values.append(int_v) |
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213 except ValueError: |
| 3028 | 214 log.warning("invalid int: {}".format(rgb_v)) |
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215 int_values.append(0) |
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216 else: |
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217 # percentage |
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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: |
| 3028 | 221 raise ValueError("value exceed 255") |
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222 int_values.append(int_v) |
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223 except ValueError: |
| 3028 | 224 log.warning("invalid percent value: {}".format(rgb_v)) |
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225 int_values.append(0) |
| 3028 | 226 str_value = "".join(["{:02x}".format(v) for v in int_values]) |
| 227 elif raw_value.startswith("hsl"): | |
| 228 log.warning("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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231 try: |
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232 str_value = CSS_COLORS[raw_value] |
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233 except KeyError: |
| 3028 | 234 log.warning("unrecognised format: {}".format(raw_value)) |
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235 str_value = DEFAULT |
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236 |
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237 if as_string: |
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238 return str_value |
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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) |
| 3028 | 243 for i in range(0, len(str_value), 2) |
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2624
56f94936df1e
code style reformatting using black
Goffi <goffi@goffi.org>
parents:
2562
diff
changeset
|
244 ] |
|
56f94936df1e
code style reformatting using black
Goffi <goffi@goffi.org>
parents:
2562
diff
changeset
|
245 ) |