1 | /*
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2 | * The MIT License (MIT)
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3 | *
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4 | * Copyright (c) 2015 - present Instructure, Inc.
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5 | *
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6 | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | * of this software and associated documentation files (the "Software"), to deal
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8 | * in the Software without restriction, including without limitation the rights
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9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | * copies of the Software, and to permit persons to whom the Software is
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11 | * furnished to do so, subject to the following conditions:
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12 | *
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13 | * The above copyright notice and this permission notice shall be included in all
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14 | * copies or substantial portions of the Software.
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15 | *
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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22 | * SOFTWARE.
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23 | */
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24 |
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25 | import { isEmpty } from '@instructure/ui-utils'
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26 |
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27 | import { formatVariableNames } from './formatVariableNames'
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28 | import { pickOverrides } from './pickOverrides'
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29 |
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30 | /**
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31 | * ---
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32 | * category: utilities/themes
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33 | * ---
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34 | * Apply theme variables to a DOM node (as CSS variables, with polyfill)
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35 | * @module applyVariablesToNode
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36 | * @param {Element} domNode HTML element to apply variables to using the style attribute
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37 | * @param {Object} variables JS variables
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38 | * @param {Object} defaults Default JS variables
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39 | * @param {String} prefix A variable prefix/namespace
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40 | */
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41 | function applyVariablesToNode(domNode, variables, defaults, prefix) {
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42 | if (!domNode || isEmpty(variables)) {
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43 | return
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44 | }
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45 |
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46 | clearCustomProperties(domNode, prefix)
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47 |
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48 | const overrides = pickOverrides(defaults, variables)
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49 |
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50 | if (overrides && !isEmpty(overrides)) {
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51 | setCustomProperties(domNode, formatVariableNames(overrides, prefix))
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52 | }
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53 | }
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54 |
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55 | function clearCustomProperties(domNode, prefix) {
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56 | const styles = domNode.style
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57 | for (let i = styles.length - 1; i >= 0; i--) {
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58 | const prop = styles[i]
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59 | if (prop.indexOf(`--${prefix}-`) >= 0) {
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60 | domNode.style.removeProperty(prop)
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61 | }
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62 | }
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63 | }
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64 |
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65 | function setCustomProperties(domNode, properties) {
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66 | Object.keys(properties).forEach((propertyName) => {
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67 | const value = properties[propertyName]
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68 |
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69 | if (value) {
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70 | domNode.style.setProperty(propertyName, value)
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71 | }
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72 | })
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73 | }
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74 |
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75 | export default applyVariablesToNode
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76 | export { applyVariablesToNode }
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