63 lines
1.3 KiB
JavaScript
63 lines
1.3 KiB
JavaScript
(() => {
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const colorKeys = [
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"ActiveBorder",
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"ActiveCaption",
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"AppWorkspace",
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"Background",
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"ButtonFace",
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"ButtonHighlight",
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"ButtonShadow",
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"ButtonText",
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"CaptionText",
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"GrayText",
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"Highlight",
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"HighlightText",
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"InactiveBorder",
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"InactiveCaption",
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"InactiveCaptionText",
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"InfoBackground",
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"InfoText",
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"Menu",
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"MenuText",
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"Scrollbar",
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"ThreeDDarkShadow",
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"ThreeDFace",
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"ThreeDHighlight",
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"ThreeDLightShadow",
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"ThreeDShadow",
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"Window",
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"WindowFrame",
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"WindowText",
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];
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const colors = (() => {
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const colors = {};
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const elem = document.createElement("div");
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document.body.appendChild(elem);
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for (const key of colorKeys) {
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elem.style.color = key;
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colors[key] = window.getComputedStyle(elem).color;
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}
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document.body.removeChild(elem);
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return colors;
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})();
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const css = `:root {
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${Object.entries(colors)
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.map(([key, val]) => `--${key}: ${val};`)
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.join("\n ")}
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}`;
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const sss = Cc["@mozilla.org/content/style-sheet-service;1"].getService(
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Ci.nsIStyleSheetService,
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);
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const uri = Services.io.newURI(
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"data:text/css;charset=UTF=8," + encodeURIComponent(css),
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);
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sss.loadAndRegisterSheet(uri, sss.AGENT_SHEET);
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})();
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