85 lines
2.2 KiB
JavaScript
85 lines
2.2 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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const THEME_PREF = "devtools.theme";
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/* eslint-disable no-unused-vars */
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/**
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* Returns the "auto" theme.
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*/
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const getAutoTheme = (exports.getAutoTheme = () => {
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return Services.appinfo.chromeColorSchemeIsDark ? "dark" : "light";
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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 = () => {
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const theme = getThemePrefValue();
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if (theme == "auto") {
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return getAutoTheme();
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}
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return theme;
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});
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/**
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* Returns the value of the pref of the current theme,
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* like "auto", "dark" or "light".
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*/
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const getThemePrefValue = (exports.getThemePrefValue = () => {
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return Services.prefs.getCharPref(THEME_PREF, "");
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});
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/**
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* Returns the color of a CSS variable (--theme-toolbar-background, --theme-highlight-red),
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* for the current toolbox theme, or null if the variable does not exist, or it's not a
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* registered property, or doesn't have a <color> syntax.
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*
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* @param {String} variableName
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* @param {Window} win: The window into which the variable should be defined.
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* @returns {String|null}
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*/
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const getCssVariableColor = (exports.getCssVariableColor = (
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variableName,
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win
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) => {
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const value = win
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.getComputedStyle(win.document.documentElement)
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.getPropertyValue(variableName);
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if (!value) {
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console.warn("Unknown", variableName, "CSS variable");
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return null;
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}
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return value;
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});
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/**
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* Set the theme preference.
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*/
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const setTheme = (exports.setTheme = newTheme => {
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Services.prefs.setCharPref(THEME_PREF, newTheme);
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});
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/**
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* Add an observer for theme changes.
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*/
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const addThemeObserver = (exports.addThemeObserver = observer => {
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Services.obs.addObserver(observer, "look-and-feel-changed");
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Services.prefs.addObserver(THEME_PREF, observer);
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});
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/**
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* Remove an observer for theme changes.
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*/
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const removeThemeObserver = (exports.removeThemeObserver = observer => {
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Services.obs.removeObserver(observer, "look-and-feel-changed");
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Services.prefs.removeObserver(THEME_PREF, observer);
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});
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/* eslint-enable */
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