mirror of https://github.com/zulip/zulip.git
56 lines
1.9 KiB
JavaScript
56 lines
1.9 KiB
JavaScript
import render_favicon_svg from "../templates/favicon.svg.hbs";
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import favicon_font_url from "!url-loader!font-subset-loader2?glyphs=0123456789KMGT∞!source-sans/TTF/SourceSans3-Bold.ttf";
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let favicon_state;
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function set_favicon() {
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$("#favicon").attr("href", favicon_state.url);
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}
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export function update_favicon(new_message_count, pm_count) {
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if (favicon_state !== undefined) {
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favicon_state.image.removeEventListener("load", set_favicon);
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// We need to remove this src so revokeObjectURL doesn't cause a
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// net::ERR_FILE_NOT_FOUND error in Chrome. This seems to be the
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// simplest way to do that without triggering an expensive network
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// request or spewing a different console error.
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favicon_state.image.src = "data:,";
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URL.revokeObjectURL(favicon_state.url);
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favicon_state = undefined;
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}
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if (new_message_count === 0 && pm_count === 0) {
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$("#favicon").attr("href", "/static/images/favicon.svg?v=4");
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return;
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}
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const pow = Math.floor(Math.log10(new_message_count) / 3);
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const suffix = ["", "K", "M", "G", "T"][pow];
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const count =
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new_message_count === 0
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? ""
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: pow < 5
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? `${Math.floor(new_message_count / 1e3 ** pow)}${suffix}`
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: "∞";
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const count_long = count.length > 2;
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const rendered_favicon = render_favicon_svg({
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count,
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count_long,
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have_pm: pm_count !== 0,
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favicon_font_url,
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});
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favicon_state = {
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url: URL.createObjectURL(new Blob([rendered_favicon], {type: "image/svg+xml"})),
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image: new Image(),
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};
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// Without loading the SVG in an Image first, Chrome mysteriously fails to
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// render the webfont (https://crbug.com/1140920).
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favicon_state.image.src = favicon_state.url;
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favicon_state.image.addEventListener("load", set_favicon);
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}
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