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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
// Holds optional fallback theme data that will be returned when no data for an
// active theme can be found. This the case for WebExtension Themes, for example.
var _fallbackThemeData = null;
export var LightweightThemeManager = {
set fallbackThemeData(data) {
if (data && Object.getOwnPropertyNames(data).length) {
_fallbackThemeData = Object.assign({}, data);
} else {
_fallbackThemeData = null;
}
},
/*
* Returns the currently active theme, taking the fallback theme into account
* if we'd be using the default theme otherwise.
*
* This will always return the original theme data and not make use of
* locally persisted resources.
*/
get currentThemeWithFallback() {
return _fallbackThemeData && _fallbackThemeData.theme;
},
get themeData() {
return _fallbackThemeData || { theme: null };
},
};