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/* * Copyright (C) 2023 - present Instructure, Inc. * * This file is part of Canvas. * * Canvas is free software: you can redistribute it and/or modify it under * the terms of the GNU Affero General Public License as published by the Free * Software Foundation, version 3 of the License. * * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more * details. * * You should have received a copy of the GNU Affero General Public License along * with this program. If not, see <http://www.gnu.org/licenses/>. */ import {getRegistry} from '@instructure/theme-registry' import {merge, cloneDeep} from 'lodash' // In case we are running a test and there is absolutely no theme data available // (happens often) const fallback = { typography: {}, colors: {}, spacing: {}, borders: {}, } // The running theme is the running theme for this page load, and it never // changes, so there's no point in doing the work more than once. let memoizedVariables function getThemeVars() { if (memoizedVariables) return memoizedVariables const {defaultThemeKey, overrides, themes} = getRegistry() // Just assume the "canvas" theme if the default key is null. This will // never happen in the live app because one way or another a theme gets // used, but unit tests don't always do that. // Also we have to cloneDeep this because the merge below is about to // mutate the whole thing. const variables = cloneDeep(themes[defaultThemeKey ?? 'canvas'] || fallback) merge(variables, overrides) memoizedVariables = {variables, key: defaultThemeKey} return memoizedVariables } export {getThemeVars}