66 lines
1.9 KiB
JavaScript
66 lines
1.9 KiB
JavaScript
/*
|
|
* @copyright Copyright (c) 2016 Julius Härtl <jus@bitgrid.net>
|
|
*
|
|
* @author Julius Härtl <jus@bitgrid.net>
|
|
*
|
|
* @license GNU AGPL version 3 or any later version
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as
|
|
* published by the Free Software Foundation, either version 3 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
app.filter('iconWhiteFilter', function() {
|
|
return function (hex) {
|
|
// RGB2HLS by Garry Tan
|
|
// http://axonflux.com/handy-rgb-to-hsl-and-rgb-to-hsv-color-model-c
|
|
var result = /^([A-Fa-f\d]{2})([A-Fa-f\d]{2})([A-Fa-f\d]{2})$/i.exec(hex);
|
|
var color = result ? {
|
|
r: parseInt(result[1], 16),
|
|
g: parseInt(result[2], 16),
|
|
b: parseInt(result[3], 16)
|
|
} : null;
|
|
if(result !== null) {
|
|
var r = color.r/255;
|
|
var g = color.g/255;
|
|
var b = color.b/255;
|
|
var max = Math.max(r, g, b), min = Math.min(r, g, b);
|
|
var h, s, l = (max + min) / 2;
|
|
|
|
if(max == min){
|
|
h = s = 0; // achromatic
|
|
}else{
|
|
var d = max - min;
|
|
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
|
|
switch(max){
|
|
case r: h = (g - b) / d + (g < b ? 6 : 0); break;
|
|
case g: h = (b - r) / d + 2; break;
|
|
case b: h = (r - g) / d + 4; break;
|
|
}
|
|
h /= 6;
|
|
}
|
|
// TODO: Maybe just darken/lighten the color
|
|
if(l<0.5) {
|
|
return "-white";
|
|
} else {
|
|
return "";
|
|
}
|
|
//var rgba = "rgba(" + color.r + "," + color.g + "," + color.b + ",0.7)";
|
|
//return rgba;
|
|
} else {
|
|
return "";
|
|
}
|
|
|
|
}
|
|
});
|