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91 lines
2.7 KiB
JavaScript
91 lines
2.7 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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/**
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* Colors for themes taken from:
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* https://developer.mozilla.org/en-US/docs/Tools/DevToolsColors
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*/
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const { Cu } = require("chrome");
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const { NetUtil } = Cu.import("resource://gre/modules/NetUtil.jsm", {});
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loader.lazyRequireGetter(this, "Services");
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loader.lazyImporter(this, "gDevTools", "resource:///modules/devtools/gDevTools.jsm");
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const themeURIs = {
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light: "chrome://browser/skin/devtools/light-theme.css",
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dark: "chrome://browser/skin/devtools/dark-theme.css"
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}
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const cachedThemes = {};
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/**
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* Returns a string of the file found at URI
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*/
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function readURI (uri) {
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let stream = NetUtil.newChannel(uri, "UTF-8", null).open();
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let count = stream.available();
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let data = NetUtil.readInputStreamToString(stream, count, { charset: "UTF-8" });
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stream.close();
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return data;
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}
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/**
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* Takes a theme name and either returns it from the cache,
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* or fetches the theme CSS file and caches it.
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*/
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function getThemeFile (name) {
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// Use the cached theme, or generate it
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let themeFile = cachedThemes[name] || readURI(themeURIs[name]).match(/--theme-.*: .*;/g).join("\n");
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// Cache if not already cached
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if (!cachedThemes[name]) {
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cachedThemes[name] = themeFile;
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}
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return themeFile;
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}
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/**
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* Returns the string value of the current theme,
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* like "dark" or "light".
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*/
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const getTheme = exports.getTheme = () => Services.prefs.getCharPref("devtools.theme");
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/**
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* Returns a color indicated by `type` (like "toolbar-background", or "highlight-red"),
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* with the ability to specify a theme, or use whatever the current theme is
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* if left unset. If theme not found, falls back to "light" theme. Returns null
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* if the type cannot be found for the theme given.
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*/
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const getColor = exports.getColor = (type, theme) => {
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let themeName = theme || getTheme();
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// If there's no theme URIs for this theme, use `light` as default.
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if (!themeURIs[themeName]) {
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themeName = "light";
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}
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let themeFile = getThemeFile(themeName);
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let match;
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// Return the appropriate variable in the theme, or otherwise, null.
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return (match = themeFile.match(new RegExp("--theme-" + type + ": (.*);"))) ? match[1] : null;
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};
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/**
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* Mimics selecting the theme selector in the toolbox;
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* sets the preference and emits an event on gDevTools to trigger
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* the themeing.
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*/
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const setTheme = exports.setTheme = (newTheme) => {
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Services.prefs.setCharPref("devtools.theme", newTheme);
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gDevTools.emit("pref-changed", {
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pref: "devtools.theme",
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newValue: newTheme,
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oldValue: getTheme()
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});
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};
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