48 lines
1.2 KiB
JavaScript
48 lines
1.2 KiB
JavaScript
const PRESET_COLOR_MAP = {
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'light-blue': '#7cd6fd',
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'blue': '#5e64ff',
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'violet': '#743ee2',
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'red': '#ff5858',
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'orange': '#ffa00a',
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'yellow': '#feef72',
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'green': '#28a745',
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'light-green': '#98d85b',
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'purple': '#b554ff',
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'magenta': '#ffa3ef',
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'black': '#36114C',
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'grey': '#bdd3e6',
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'light-grey': '#f0f4f7',
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'dark-grey': '#b8c2cc'
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};
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function limitColor(r){
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if (r > 255) return 255;
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else if (r < 0) return 0;
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return r;
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}
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export function lightenDarkenColor(color, amt) {
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let col = getColor(color);
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let usePound = false;
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if (col[0] == "#") {
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col = col.slice(1);
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usePound = true;
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}
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let num = parseInt(col,16);
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let r = limitColor((num >> 16) + amt);
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let b = limitColor(((num >> 8) & 0x00FF) + amt);
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let g = limitColor((num & 0x0000FF) + amt);
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return (usePound?"#":"") + (g | (b << 8) | (r << 16)).toString(16);
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}
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export function isValidColor(string) {
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// https://stackoverflow.com/a/32685393
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let HEX_RE = /(^\s*)(#)((?:[A-Fa-f0-9]{3}){1,2})$/i;
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let RGB_RE = /(^\s*)(rgb|hsl)(a?)[(]\s*([\d.]+\s*%?)\s*,\s*([\d.]+\s*%?)\s*,\s*([\d.]+\s*%?)\s*(?:,\s*([\d.]+)\s*)?[)]$/i;
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return HEX_RE.test(string) || RGB_RE.test(string);
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}
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export const getColor = (color) => {
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return PRESET_COLOR_MAP[color] || color;
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};
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