mirror of
https://github.com/Jermolene/TiddlyWiki5
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0bb8e08edc
With this commit tag pills will now choose for the foreground colour either the current palette “foreground” or “background” colours, according to which has the higher contrast. It’s something @gernert has expressed an interest in in the past, and I’ve tended to agree that it is a nice piece of polish. It opens up the possibility of paler colours for tag pills than are currently possible. The trouble is that in order to implement it I’ve had to bring in a third party library for parsing CSS colours. It weighs in just over 9KB, making quite a lot of weight for such a small feature. I don’t see any other immediate uses for the colour parsing library either. So, I’m undecided at the moment whether this should stay in the core.
201 lines
8.9 KiB
JavaScript
201 lines
8.9 KiB
JavaScript
// (c) Dean McNamee <dean@gmail.com>, 2012.
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//
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// https://github.com/deanm/css-color-parser-js
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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// http://www.w3.org/TR/css3-color/
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var kCSSColorTable = {
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"transparent": [0,0,0,0], "aliceblue": [240,248,255,1],
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"antiquewhite": [250,235,215,1], "aqua": [0,255,255,1],
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"aquamarine": [127,255,212,1], "azure": [240,255,255,1],
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"beige": [245,245,220,1], "bisque": [255,228,196,1],
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"black": [0,0,0,1], "blanchedalmond": [255,235,205,1],
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"blue": [0,0,255,1], "blueviolet": [138,43,226,1],
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"brown": [165,42,42,1], "burlywood": [222,184,135,1],
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"cadetblue": [95,158,160,1], "chartreuse": [127,255,0,1],
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"chocolate": [210,105,30,1], "coral": [255,127,80,1],
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"cornflowerblue": [100,149,237,1], "cornsilk": [255,248,220,1],
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"crimson": [220,20,60,1], "cyan": [0,255,255,1],
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"darkblue": [0,0,139,1], "darkcyan": [0,139,139,1],
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"darkgoldenrod": [184,134,11,1], "darkgray": [169,169,169,1],
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"darkgreen": [0,100,0,1], "darkgrey": [169,169,169,1],
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"darkkhaki": [189,183,107,1], "darkmagenta": [139,0,139,1],
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"darkolivegreen": [85,107,47,1], "darkorange": [255,140,0,1],
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"darkorchid": [153,50,204,1], "darkred": [139,0,0,1],
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"darksalmon": [233,150,122,1], "darkseagreen": [143,188,143,1],
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"darkslateblue": [72,61,139,1], "darkslategray": [47,79,79,1],
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"darkslategrey": [47,79,79,1], "darkturquoise": [0,206,209,1],
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"darkviolet": [148,0,211,1], "deeppink": [255,20,147,1],
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"deepskyblue": [0,191,255,1], "dimgray": [105,105,105,1],
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"dimgrey": [105,105,105,1], "dodgerblue": [30,144,255,1],
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"firebrick": [178,34,34,1], "floralwhite": [255,250,240,1],
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"forestgreen": [34,139,34,1], "fuchsia": [255,0,255,1],
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"gainsboro": [220,220,220,1], "ghostwhite": [248,248,255,1],
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"gold": [255,215,0,1], "goldenrod": [218,165,32,1],
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"gray": [128,128,128,1], "green": [0,128,0,1],
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"greenyellow": [173,255,47,1], "grey": [128,128,128,1],
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"honeydew": [240,255,240,1], "hotpink": [255,105,180,1],
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"indianred": [205,92,92,1], "indigo": [75,0,130,1],
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"ivory": [255,255,240,1], "khaki": [240,230,140,1],
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"lavender": [230,230,250,1], "lavenderblush": [255,240,245,1],
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"lawngreen": [124,252,0,1], "lemonchiffon": [255,250,205,1],
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"lightblue": [173,216,230,1], "lightcoral": [240,128,128,1],
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"lightcyan": [224,255,255,1], "lightgoldenrodyellow": [250,250,210,1],
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"lightgray": [211,211,211,1], "lightgreen": [144,238,144,1],
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"lightgrey": [211,211,211,1], "lightpink": [255,182,193,1],
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"lightsalmon": [255,160,122,1], "lightseagreen": [32,178,170,1],
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"lightskyblue": [135,206,250,1], "lightslategray": [119,136,153,1],
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"lightslategrey": [119,136,153,1], "lightsteelblue": [176,196,222,1],
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"lightyellow": [255,255,224,1], "lime": [0,255,0,1],
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"limegreen": [50,205,50,1], "linen": [250,240,230,1],
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"magenta": [255,0,255,1], "maroon": [128,0,0,1],
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"mediumaquamarine": [102,205,170,1], "mediumblue": [0,0,205,1],
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"mediumorchid": [186,85,211,1], "mediumpurple": [147,112,219,1],
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"mediumseagreen": [60,179,113,1], "mediumslateblue": [123,104,238,1],
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"mediumspringgreen": [0,250,154,1], "mediumturquoise": [72,209,204,1],
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"mediumvioletred": [199,21,133,1], "midnightblue": [25,25,112,1],
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"mintcream": [245,255,250,1], "mistyrose": [255,228,225,1],
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"moccasin": [255,228,181,1], "navajowhite": [255,222,173,1],
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"navy": [0,0,128,1], "oldlace": [253,245,230,1],
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"olive": [128,128,0,1], "olivedrab": [107,142,35,1],
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"orange": [255,165,0,1], "orangered": [255,69,0,1],
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"orchid": [218,112,214,1], "palegoldenrod": [238,232,170,1],
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"palegreen": [152,251,152,1], "paleturquoise": [175,238,238,1],
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"palevioletred": [219,112,147,1], "papayawhip": [255,239,213,1],
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"peachpuff": [255,218,185,1], "peru": [205,133,63,1],
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"pink": [255,192,203,1], "plum": [221,160,221,1],
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"powderblue": [176,224,230,1], "purple": [128,0,128,1],
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"red": [255,0,0,1], "rosybrown": [188,143,143,1],
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"royalblue": [65,105,225,1], "saddlebrown": [139,69,19,1],
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"salmon": [250,128,114,1], "sandybrown": [244,164,96,1],
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"seagreen": [46,139,87,1], "seashell": [255,245,238,1],
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"sienna": [160,82,45,1], "silver": [192,192,192,1],
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"skyblue": [135,206,235,1], "slateblue": [106,90,205,1],
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"slategray": [112,128,144,1], "slategrey": [112,128,144,1],
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"snow": [255,250,250,1], "springgreen": [0,255,127,1],
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"steelblue": [70,130,180,1], "tan": [210,180,140,1],
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"teal": [0,128,128,1], "thistle": [216,191,216,1],
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"tomato": [255,99,71,1], "turquoise": [64,224,208,1],
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"violet": [238,130,238,1], "wheat": [245,222,179,1],
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"white": [255,255,255,1], "whitesmoke": [245,245,245,1],
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"yellow": [255,255,0,1], "yellowgreen": [154,205,50,1]}
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function clamp_css_byte(i) { // Clamp to integer 0 .. 255.
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i = Math.round(i); // Seems to be what Chrome does (vs truncation).
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return i < 0 ? 0 : i > 255 ? 255 : i;
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}
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function clamp_css_float(f) { // Clamp to float 0.0 .. 1.0.
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return f < 0 ? 0 : f > 1 ? 1 : f;
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}
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function parse_css_int(str) { // int or percentage.
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if (str[str.length - 1] === '%')
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return clamp_css_byte(parseFloat(str) / 100 * 255);
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return clamp_css_byte(parseInt(str));
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}
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function parse_css_float(str) { // float or percentage.
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if (str[str.length - 1] === '%')
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return clamp_css_float(parseFloat(str) / 100);
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return clamp_css_float(parseFloat(str));
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}
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function css_hue_to_rgb(m1, m2, h) {
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if (h < 0) h += 1;
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else if (h > 1) h -= 1;
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if (h * 6 < 1) return m1 + (m2 - m1) * h * 6;
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if (h * 2 < 1) return m2;
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if (h * 3 < 2) return m1 + (m2 - m1) * (2/3 - h) * 6;
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return m1;
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}
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function parseCSSColor(css_str) {
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// Remove all whitespace, not compliant, but should just be more accepting.
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var str = css_str.replace(/ /g, '').toLowerCase();
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// Color keywords (and transparent) lookup.
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if (str in kCSSColorTable) return kCSSColorTable[str].slice(); // dup.
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// #abc and #abc123 syntax.
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if (str[0] === '#') {
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if (str.length === 4) {
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var iv = parseInt(str.substr(1), 16); // TODO(deanm): Stricter parsing.
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if (!(iv >= 0 && iv <= 0xfff)) return null; // Covers NaN.
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return [((iv & 0xf00) >> 4) | ((iv & 0xf00) >> 8),
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(iv & 0xf0) | ((iv & 0xf0) >> 4),
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(iv & 0xf) | ((iv & 0xf) << 4),
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1];
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} else if (str.length === 7) {
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var iv = parseInt(str.substr(1), 16); // TODO(deanm): Stricter parsing.
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if (!(iv >= 0 && iv <= 0xffffff)) return null; // Covers NaN.
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return [(iv & 0xff0000) >> 16,
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(iv & 0xff00) >> 8,
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iv & 0xff,
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1];
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}
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return null;
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}
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var op = str.indexOf('('), ep = str.indexOf(')');
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if (op !== -1 && ep + 1 === str.length) {
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var fname = str.substr(0, op);
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var params = str.substr(op+1, ep-(op+1)).split(',');
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var alpha = 1; // To allow case fallthrough.
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switch (fname) {
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case 'rgba':
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if (params.length !== 4) return null;
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alpha = parse_css_float(params.pop());
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// Fall through.
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case 'rgb':
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if (params.length !== 3) return null;
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return [parse_css_int(params[0]),
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parse_css_int(params[1]),
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parse_css_int(params[2]),
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alpha];
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case 'hsla':
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if (params.length !== 4) return null;
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alpha = parse_css_float(params.pop());
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// Fall through.
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case 'hsl':
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if (params.length !== 3) return null;
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var h = (((parseFloat(params[0]) % 360) + 360) % 360) / 360; // 0 .. 1
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// NOTE(deanm): According to the CSS spec s/l should only be
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// percentages, but we don't bother and let float or percentage.
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var s = parse_css_float(params[1]);
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var l = parse_css_float(params[2]);
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var m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;
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var m1 = l * 2 - m2;
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return [clamp_css_byte(css_hue_to_rgb(m1, m2, h+1/3) * 255),
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clamp_css_byte(css_hue_to_rgb(m1, m2, h) * 255),
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clamp_css_byte(css_hue_to_rgb(m1, m2, h-1/3) * 255),
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alpha];
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default:
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return null;
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}
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}
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return null;
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}
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try { exports.parseCSSColor = parseCSSColor } catch(e) { }
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