32 lines
1 KiB
JavaScript
32 lines
1 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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// Holds optional fallback theme data that will be returned when no data for an
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// active theme can be found. This the case for WebExtension Themes, for example.
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var _fallbackThemeData = null;
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export var LightweightThemeManager = {
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set fallbackThemeData(data) {
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if (data && Object.getOwnPropertyNames(data).length) {
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_fallbackThemeData = Object.assign({}, data);
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} else {
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_fallbackThemeData = null;
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}
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},
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/*
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* Returns the currently active theme, taking the fallback theme into account
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* if we'd be using the default theme otherwise.
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*
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* This will always return the original theme data and not make use of
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* locally persisted resources.
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*/
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get currentThemeWithFallback() {
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return _fallbackThemeData && _fallbackThemeData.theme;
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},
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get themeData() {
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return _fallbackThemeData || { theme: null };
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},
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};
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