93 lines
2.3 KiB
JavaScript
93 lines
2.3 KiB
JavaScript
(function(){
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function parseColor(hex) {
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if (!hex) return [255, 255, 255];
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let c = hex.replace('#', '');
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if (c.length === 3) c = c.split('').map(x => x + x).join('');
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const num = parseInt(c, 16);
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return [(num >> 16) & 255, (num >> 8) & 255, num & 255];
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}
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const toHex = v => v.toString(16).padStart(2, '0');
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function hexToRgba(hex, a = 1) {
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const [r, g, b] = parseColor(hex);
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return `rgba(${r},${g},${b},${a})`;
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}
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function getContrastColor(hex) {
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const [r, g, b] = parseColor(hex);
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const yiq = (r * 299 + g * 587 + b * 114) / 1000;
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return yiq >= 128 ? '#000' : '#fff';
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}
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function lightenColor(hex, p) {
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const [r, g, b] = parseColor(hex).map(v =>
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Math.min(255, Math.round(v + (255 - v) * p))
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);
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return '#' + [r, g, b].map(toHex).join('');
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}
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function getHumanDiff(d1, d2) {
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let start = d1 < d2 ? d1 : d2;
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let end = d1 < d2 ? d2 : d1;
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let years = end.getUTCFullYear() - start.getUTCFullYear();
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let months = end.getUTCMonth() - start.getUTCMonth();
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let days = end.getUTCDate() - start.getUTCDate();
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if (days < 0) {
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months--;
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let prevMonthDays = new Date(Date.UTC(
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end.getUTCFullYear(),
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end.getUTCMonth(), 0
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)).getUTCDate();
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days += prevMonthDays;
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}
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if (months < 0) {
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years--;
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months += 12;
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}
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let aligned = new Date(Date.UTC(
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start.getUTCFullYear() + years,
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start.getUTCMonth() + months,
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start.getUTCDate() + days,
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start.getUTCHours(),
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start.getUTCMinutes(),
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start.getUTCSeconds()
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));
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let diffMs = end.getTime() - aligned.getTime();
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if (diffMs < 0) {
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diffMs += 24 * 3600e3;
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if (days > 0) {
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days--;
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} else {
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months--;
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if (months < 0) {
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years--;
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months += 12;
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}
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days = new Date(Date.UTC(
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end.getUTCFullYear(),
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end.getUTCMonth(), 0
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)).getUTCDate();
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}
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}
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let hours = Math.floor(diffMs / 3600e3); diffMs -= hours * 3600e3;
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let minutes = Math.floor(diffMs / 60e3); diffMs -= minutes * 60e3;
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let seconds = Math.floor(diffMs / 1e3);
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return { years, months, days, hours, minutes, seconds };
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}
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window.Utils = {
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parseColor,
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hexToRgba,
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getContrastColor,
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lightenColor,
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getHumanDiff
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};
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})();
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