| 1 | (function () {
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| 2 |
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| 3 | if (typeof Prism === 'undefined' || typeof document === 'undefined') {
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| 4 | return;
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| 5 | }
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| 6 |
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| 7 | // https://developer.mozilla.org/en-US/docs/Web/API/Element/matches#Polyfill
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| 8 | if (!Element.prototype.matches) {
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| 9 | Element.prototype.matches = Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector;
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| 10 | }
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| 11 |
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| 12 | var script = Prism.util.currentScript();
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| 13 |
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| 14 |
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| 15 | /**
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| 16 | * @type {Array<(element: HTMLElement) => boolean>}
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| 17 | */
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| 18 | var filters = [];
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| 19 |
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| 20 | var config = Prism.plugins.filterHighlightAll = {
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| 21 |
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| 22 | /**
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| 23 | * Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements for
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| 24 | * which the given function returns `true` will be highlighted.
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| 25 | *
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| 26 | * @param {(value: { element: HTMLElement, language: string }) => boolean} condition
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| 27 | */
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| 28 | add: function (condition) {
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| 29 | filters.push(function (element) {
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| 30 | return condition({
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| 31 | element: element,
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| 32 | language: Prism.util.getLanguage(element)
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| 33 | });
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| 34 | });
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| 35 | },
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| 36 |
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| 37 | /**
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| 38 | * Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements that
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| 39 | * match the given CSS selection will be highlighted.
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| 40 | *
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| 41 | * @param {string} selector
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| 42 | */
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| 43 | addSelector: function (selector) {
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| 44 | filters.push(function (element) {
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| 45 | return element.matches(selector);
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| 46 | });
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| 47 | },
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| 48 |
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| 49 | reject: {
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| 50 |
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| 51 | /**
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| 52 | * Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements for
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| 53 | * which the given function returns `false` will be highlighted.
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| 54 | *
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| 55 | * @param {(value: { element: HTMLElement, language: string }) => boolean} condition
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| 56 | */
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| 57 | add: function (condition) {
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| 58 | filters.push(function (element) {
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| 59 | return !condition({
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| 60 | element: element,
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| 61 | language: Prism.util.getLanguage(element)
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| 62 | });
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| 63 | });
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| 64 | },
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| 65 |
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| 66 | /**
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| 67 | * Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements that do
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| 68 | * not match the given CSS selection will be highlighted.
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| 69 | *
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| 70 | * @param {string} selector
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| 71 | */
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| 72 | addSelector: function (selector) {
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| 73 | filters.push(function (element) {
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| 74 | return !element.matches(selector);
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| 75 | });
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| 76 | },
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| 77 |
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| 78 | },
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| 79 |
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| 80 | /**
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| 81 | * Filters the elements of `highlightAll` and `highlightAllUnder` such that only elements with a known language
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| 82 | * will be highlighted. All elements with an unset or unknown language will be ignored.
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| 83 | *
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| 84 | * __Note:__ This will effectively disable the AutoLoader plugin.
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| 85 | *
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| 86 | * @type {boolean}
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| 87 | */
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| 88 | filterKnown: !!script && script.hasAttribute('data-filter-known')
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| 89 | };
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| 90 |
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| 91 | config.add(function filterKnown(env) {
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| 92 | return !config.filterKnown || typeof Prism.languages[env.language] === 'object';
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| 93 | });
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| 94 |
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| 95 | if (script) {
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| 96 | var attr;
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| 97 | attr = script.getAttribute('data-filter-selector');
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| 98 | if (attr) {
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| 99 | config.addSelector(attr);
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| 100 | }
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| 101 | attr = script.getAttribute('data-reject-selector');
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| 102 | if (attr) {
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| 103 | config.reject.addSelector(attr);
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| 104 | }
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| 105 | }
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| 106 |
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| 107 | /**
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| 108 | * Applies all filters to the given element and returns true if and only if every filter returned true on the
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| 109 | * given element.
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| 110 | *
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| 111 | * @param {HTMLElement} element
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| 112 | * @returns {boolean}
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| 113 | */
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| 114 | function combinedFilter(element) {
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| 115 | for (var i = 0, l = filters.length; i < l; i++) {
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| 116 | if (!filters[i](element)) {
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| 117 | return false;
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| 118 | }
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| 119 | }
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| 120 | return true;
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| 121 | }
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| 122 |
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| 123 | Prism.hooks.add('before-all-elements-highlight', function (env) {
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| 124 | env.elements = env.elements.filter(combinedFilter);
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| 125 | });
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| 126 |
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| 127 | }());
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