76 lines
2.6 KiB
JavaScript
76 lines
2.6 KiB
JavaScript
const flags = [
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{
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id: 'pride',
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colors: ['#E04641', '#DE7E41', '#E4D56F', '#55B85F', '#2473B5', '#6F5DA5'],
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transform: 'rotate(90)'
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}, {
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id: 'trans',
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colors: ['#55CDFC', '#F7A8B8', '#FFFFFF', '#F7A8B8', '#55CDFC'],
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transform: 'rotate(90)'
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}
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];
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const generateGradient = colors => {
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const steps = colors.length;
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return colors.map((color, index) => { return [
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[color, (index / steps)],
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[color, (index + 1) / steps]
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]}).flat();
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};
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const generateStops = (colors, opacity) => {
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return generateGradient(colors).map(([color, offset]) => {
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return `<stop stop-color="${color}" stop-opacity="${opacity}" offset="${offset * 100}%"></stop>`;
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});
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};
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const makeLinearGradientSvg = (id, colors, opacity, transform) => {
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return `<svg xmlns="http://www.w3.org/2000/svg" id="svg-${id}" preserveAspectRatio="none" width="100%" height="100%">
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<defs>
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<linearGradient id="gradient-${id}" gradientTransform="${transform}">
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${generateStops(colors, opacity).join('\n')}
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</linearGradient>
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</defs>
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<style>
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rect { height: 100%; width: 100%; }
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</style>
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<rect fill="url(#gradient-${id})" width="100%" height="100%" />
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</svg>`;
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};
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flags.forEach(flag => {
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const svg_html = makeLinearGradientSvg(flag.id, flag.colors, flag.opacity ?? '0.8', flag.transform ?? 'rotate(0)');
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const container = document.createElement('div');
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container.classList.add('hidden-visually');
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container.ariaHidden = true;
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container.innerHTML = svg_html;
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const style_c = document.createElement('style');
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style_c.textContent = `
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body {
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--image-background-pride-${flag.id}: url('data:image/svg+xml;base64,${btoa(svg_html)}');
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--image-background-pride-gradient-${flag.id}: url("#gradient-${flag.id}");
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}
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`;
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document.body.prepend(container);
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document.head.prepend(style_c);
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});
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fetch(OC.generateUrl('/apps/pride_flags/settings'))
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.then(response => response.json())
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.then(({folderVariant, buttonVariant}) => {
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if (document.querySelector('head > style#pride_flag_settings') == null) {
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const node = document.createElement('style');
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style.id = 'pride_flag_settings';
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document.head.prepend(node);
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}
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const style_settings = document.querySelector('head > style#pride_flag_settings');
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style_settings.textContent = `
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body {
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--image-background-pride-button: var(--image-background-pride-${buttonVariant});
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--image-background-pride-folder: var(--image-background-pride-${folderVariant});
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--image-background-pride-button-gradient: var(--image-background-pride-${buttonVariant}-gradient);
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--image-background-pride-folder-gradient: var(--image-background-pride-${folderVariant}-gradient);
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}
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`;
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});
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