128 lines
3.3 KiB
JavaScript
128 lines
3.3 KiB
JavaScript
(function () {
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if (typeof Prism === 'undefined' || typeof document === 'undefined') {
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return;
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}
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// https://developer.mozilla.org/en-US/docs/Web/API/Element/matches#Polyfill
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if (!Element.prototype.matches) {
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Element.prototype.matches = Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector;
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}
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var script = Prism.util.currentScript();
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/**
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* @type {Array<(element: HTMLElement) => boolean>}
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*/
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var filters = [];
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var config = Prism.plugins.filterHighlightAll = {
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/**
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* Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements for
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* which the given function returns `true` will be highlighted.
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*
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* @param {(value: { element: HTMLElement, language: string }) => boolean} condition
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*/
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add: function (condition) {
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filters.push(function (element) {
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return condition({
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element: element,
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language: Prism.util.getLanguage(element)
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});
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});
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},
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/**
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* Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements that
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* match the given CSS selection will be highlighted.
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*
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* @param {string} selector
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*/
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addSelector: function (selector) {
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filters.push(function (element) {
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return element.matches(selector);
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});
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},
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reject: {
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/**
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* Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements for
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* which the given function returns `false` will be highlighted.
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*
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* @param {(value: { element: HTMLElement, language: string }) => boolean} condition
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*/
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add: function (condition) {
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filters.push(function (element) {
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return !condition({
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element: element,
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language: Prism.util.getLanguage(element)
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});
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});
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},
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/**
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* Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements that do
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* not match the given CSS selection will be highlighted.
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*
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* @param {string} selector
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*/
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addSelector: function (selector) {
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filters.push(function (element) {
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return !element.matches(selector);
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});
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},
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},
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/**
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* Filters the elements of `highlightAll` and `highlightAllUnder` such that only elements with a known language
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* will be highlighted. All elements with an unset or unknown language will be ignored.
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*
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* __Note:__ This will effectively disable the AutoLoader plugin.
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*
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* @type {boolean}
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*/
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filterKnown: !!script && script.hasAttribute('data-filter-known')
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};
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config.add(function filterKnown(env) {
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return !config.filterKnown || typeof Prism.languages[env.language] === 'object';
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});
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if (script) {
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var attr;
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attr = script.getAttribute('data-filter-selector');
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if (attr) {
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config.addSelector(attr);
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}
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attr = script.getAttribute('data-reject-selector');
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if (attr) {
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config.reject.addSelector(attr);
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}
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}
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/**
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* Applies all filters to the given element and returns true if and only if every filter returned true on the
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* given element.
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*
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* @param {HTMLElement} element
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* @returns {boolean}
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*/
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function combinedFilter(element) {
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for (var i = 0, l = filters.length; i < l; i++) {
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if (!filters[i](element)) {
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return false;
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}
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}
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return true;
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}
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Prism.hooks.add('before-all-elements-highlight', function (env) {
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env.elements = env.elements.filter(combinedFilter);
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});
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}());
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