mirror of https://github.com/go-gitea/gitea
34 lines
1.3 KiB
JavaScript
34 lines
1.3 KiB
JavaScript
import tinycolor from 'tinycolor2';
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// Returns relative luminance for a SRGB color - https://en.wikipedia.org/wiki/Relative_luminance
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// Keep this in sync with modules/util/color.go
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function getRelativeLuminance(color) {
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const {r, g, b} = tinycolor(color).toRgb();
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return (0.2126729 * r + 0.7151522 * g + 0.072175 * b) / 255;
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}
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function useLightText(backgroundColor) {
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return getRelativeLuminance(backgroundColor) < 0.453;
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}
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// Given a background color, returns a black or white foreground color that the highest
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// contrast ratio. In the future, the APCA contrast function, or CSS `contrast-color` will be better.
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// https://github.com/color-js/color.js/blob/eb7b53f7a13bb716ec8b28c7a56f052cd599acd9/src/contrast/APCA.js#L42
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export function contrastColor(backgroundColor) {
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return useLightText(backgroundColor) ? '#fff' : '#000';
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}
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function resolveColors(obj) {
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const styles = window.getComputedStyle(document.documentElement);
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const getColor = (name) => styles.getPropertyValue(name).trim();
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return Object.fromEntries(Object.entries(obj).map(([key, value]) => [key, getColor(value)]));
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}
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export const chartJsColors = resolveColors({
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text: '--color-text',
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border: '--color-secondary-alpha-60',
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commits: '--color-primary-alpha-60',
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additions: '--color-green',
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deletions: '--color-red',
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});
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