From a7f700901947150cfd347342fbd26fe9f3e4ee83 Mon Sep 17 00:00:00 2001 From: Michael Schmidt Date: Mon, 2 Dec 2019 14:10:53 +0100 Subject: [PATCH] Added new Filter highlightAll plugin (#2074) This adds a new plugin to Prism which allows users to filter which elements will be highlighted by the `highlightAll` and `highlightAllUnder` methods. --- components.js | 2 +- components.json | 6 + components/prism-core.js | 45 +++--- components/prism-core.min.js | 2 +- plugins/filter-highlight-all/index.html | 146 ++++++++++++++++++ .../prism-filter-highlight-all.js | 125 +++++++++++++++ .../prism-filter-highlight-all.min.js | 1 + prism.js | 45 +++--- 8 files changed, 328 insertions(+), 44 deletions(-) create mode 100644 plugins/filter-highlight-all/index.html create mode 100644 plugins/filter-highlight-all/prism-filter-highlight-all.js create mode 100644 plugins/filter-highlight-all/prism-filter-highlight-all.min.js diff --git a/components.js b/components.js index f11d68a3a3..39985e8b2e 100644 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if (typeof module !== 'undefined' && module.exports) { module.exports = components; } \ No newline at end of file diff --git a/components.json b/components.json index ea7897f1a5..bc0dbe33dc 100644 --- a/components.json +++ b/components.json @@ -1209,6 +1209,12 @@ "description": "Highlights the code inside diff blocks.", "owner": "RunDevelopment", "require": "diff" + }, + "filter-highlight-all": { + "title": "Filter highlightAll", + "description": "Filters the elements the highlightAll and highlightAllUnder methods actually highlight.", + "owner": "RunDevelopment", + "noCSS": true } } } diff --git a/components/prism-core.js b/components/prism-core.js index bac6b866c3..7726f349ec 100644 --- a/components/prism-core.js +++ b/components/prism-core.js @@ -18,24 +18,6 @@ var Prism = (function (_self){ var lang = /\blang(?:uage)?-([\w-]+)\b/i; var uniqueId = 0; -/** - * Returns the Prism language of the given element set by a `language-xxxx` or `lang-xxxx` class. - * - * If no language is set for the element or the element is `null` or `undefined`, `none` will be returned. - * - * @param {Element} element - * @returns {string} - */ -function getLanguage(element) { - while (element && !lang.test(element.className)) { - element = element.parentNode; - } - if (element) { - return (element.className.match(lang) || [, 'none'])[1].toLowerCase(); - } - return 'none'; -} - var _ = { manual: _self.Prism && _self.Prism.manual, @@ -103,6 +85,24 @@ var _ = { } }, + /** + * Returns the Prism language of the given element set by a `language-xxxx` or `lang-xxxx` class. + * + * If no language is set for the element or the element is `null` or `undefined`, `none` will be returned. + * + * @param {Element} element + * @returns {string} + */ + getLanguage: function (element) { + while (element && !lang.test(element.className)) { + element = element.parentElement; + } + if (element) { + return (element.className.match(lang) || [, 'none'])[1].toLowerCase(); + } + return 'none'; + }, + /** * Returns the script element that is currently executing. * @@ -236,21 +236,24 @@ var _ = { highlightAllUnder: function(container, async, callback) { var env = { callback: callback, + container: container, selector: 'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code' }; _.hooks.run('before-highlightall', env); - var elements = container.querySelectorAll(env.selector); + env.elements = Array.prototype.slice.apply(env.container.querySelectorAll(env.selector)); + + _.hooks.run('before-all-elements-highlight', env); - for (var i=0, element; element = elements[i++];) { + for (var i = 0, element; element = env.elements[i++];) { _.highlightElement(element, async === true, env.callback); } }, highlightElement: function(element, async, callback) { // Find language - var language = getLanguage(element); + var language = _.util.getLanguage(element); var grammar = _.languages[language]; // Set language on the element, if not present diff --git a/components/prism-core.min.js b/components/prism-core.min.js index 5a2d26a1ac..4f15a09411 100644 --- a/components/prism-core.min.js +++ b/components/prism-core.min.js @@ -1 +1 @@ -var _self="undefined"!=typeof window?window:"undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?self:{},Prism=function(u){var c=/\blang(?:uage)?-([\w-]+)\b/i,r=0;var _={manual:u.Prism&&u.Prism.manual,disableWorkerMessageHandler:u.Prism&&u.Prism.disableWorkerMessageHandler,util:{encode:function(e){return e instanceof L?new L(e.type,_.util.encode(e.content),e.alias):Array.isArray(e)?e.map(_.util.encode):e.replace(/&/g,"&").replace(/e.length)return;if(!(k instanceof L)){if(d&&y!=r.length-1){if(c.lastIndex=v,!(O=c.exec(e)))break;for(var b=O.index+(f&&O[1]?O[1].length:0),w=O.index+O[0].length,A=y,P=v,x=r.length;A"+n.content+""},!u.document)return u.addEventListener&&(_.disableWorkerMessageHandler||u.addEventListener("message",function(e){var r=JSON.parse(e.data),n=r.language,t=r.code,a=r.immediateClose;u.postMessage(_.highlight(t,_.languages[n],n)),a&&u.close()},!1)),_;var e=_.util.currentScript();if(e&&(_.filename=e.src,e.hasAttribute("data-manual")&&(_.manual=!0)),!_.manual){function n(){_.manual||_.highlightAll()}var t=document.readyState;"loading"===t||"interactive"===t&&e&&e.defer?document.addEventListener("DOMContentLoaded",n):window.requestAnimationFrame?window.requestAnimationFrame(n):window.setTimeout(n,16)}return _}(_self);"undefined"!=typeof module&&module.exports&&(module.exports=Prism),"undefined"!=typeof global&&(global.Prism=Prism); \ No newline at end of file +var _self="undefined"!=typeof window?window:"undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?self:{},Prism=function(u){var c=/\blang(?:uage)?-([\w-]+)\b/i,n=0,C={manual:u.Prism&&u.Prism.manual,disableWorkerMessageHandler:u.Prism&&u.Prism.disableWorkerMessageHandler,util:{encode:function(e){return e instanceof _?new _(e.type,C.util.encode(e.content),e.alias):Array.isArray(e)?e.map(C.util.encode):e.replace(/&/g,"&").replace(/e.length)return;if(!(k instanceof _)){if(h&&y!=n.length-1){if(c.lastIndex=v,!(O=c.exec(e)))break;for(var b=O.index+(f&&O[1]?O[1].length:0),w=O.index+O[0].length,A=y,P=v,x=n.length;A"+r.content+""},!u.document)return u.addEventListener&&(C.disableWorkerMessageHandler||u.addEventListener("message",function(e){var n=JSON.parse(e.data),r=n.language,t=n.code,a=n.immediateClose;u.postMessage(C.highlight(t,C.languages[r],r)),a&&u.close()},!1)),C;var e=C.util.currentScript();if(e&&(C.filename=e.src,e.hasAttribute("data-manual")&&(C.manual=!0)),!C.manual){function r(){C.manual||C.highlightAll()}var t=document.readyState;"loading"===t||"interactive"===t&&e&&e.defer?document.addEventListener("DOMContentLoaded",r):window.requestAnimationFrame?window.requestAnimationFrame(r):window.setTimeout(r,16)}return C}(_self);"undefined"!=typeof module&&module.exports&&(module.exports=Prism),"undefined"!=typeof global&&(global.Prism=Prism); \ No newline at end of file diff --git a/plugins/filter-highlight-all/index.html b/plugins/filter-highlight-all/index.html new file mode 100644 index 0000000000..53f9439568 --- /dev/null +++ b/plugins/filter-highlight-all/index.html @@ -0,0 +1,146 @@ + + + + + + + Filter highlightAll ▲ Prism plugins + + + + + + + + + + + +
+ +
+

How to use

+ +

Filter highlightAll provides you with ways to filter the element the highlightAll and highlightAllUnder methods actually highlight. This can be very useful when you use Prism's automatic highlighting when loading the page but want to exclude certain code blocks.

+
+ +
+

API

+ +

In Prism.plugins.filterHighlightAll you can find the following:

+ +
+
add(condition: (value: { element, language: string }) => boolean): void
+
+ Adds a new filter which will only allow an element to be highlighted if the given function returns true for that element.
+ This can be used to define a custom language filter. +
+ +
addSelector(selector: string): void
+
+ Adds a new filter which will only allow an element to be highlighted if the element matches the given CSS selector. +
+ +
reject.add(condition: (value: { element, language: string }) => boolean): void
+
+ Same as add, but only elements which do not fulfill the condition will be highlighted. +
+ +
reject.addSelector(selector: string): void
+
+ Same as addSelector, but only elements which do not match the selector will be highlighted. +
+ +
filterKnown: boolean = false
+
+ Set this to true to only allow known languages. + Code blocks without a set language or an unknown language will not be highlighted. +
+
+ +

An element will only be highlighted by the highlightAll and highlightAllUnder methods if all of the above accept the element.

+ +

Attributes

+ +

You can also add the following data-* attributes to the script which contains the Filter highlightAll plugin.

+ +
+
<script src="..." data-filter-selector="<css selector>">
+
+ This attribute is a shorthand for Prism.plugins.filterHighlightAll.addSelector. + The value of the attribute will be passed as is to the addSelector function. +
+ +
<script src="..." data-reject-selector="<css selector>">
+
+ This attribute is a shorthand for Prism.plugins.filterHighlightAll.reject.addSelector. + The value of the attribute will be passed as is to the rejectSelector function. +
+ +
<script src="..." data-filter-known>
+
+ This attribute can be used to set the value of Prism.plugins.filterHighlightAll.filterKnown. + filterKnown will be set to true if the attribute is present, false otherwise. +
+
+ +
+ +
+

Examples

+ +

The following code is used to define a filter on this page.

+ + 
// <code> elements with a .no-highlight class will be ignored
+Prism.plugins.filterHighlightAll.reject.addSelector('code.no-highlight');
+Prism.plugins.filterHighlightAll.reject.addSelector('pre.no-highlight > code');
+
+// don't highlight CSS code
+Prism.plugins.filterHighlightAll.add(function (env) {
+	return env.language !== 'css';
+});
+ +

The results:

+ + 
let foo = "I'm not being highlighted";
+ + 
a.link::after {
+	content: 'also not being highlighted';
+	color: #F00;
+}
+ +

Prism will ignore these blocks, so you can even define your own static highlighting which Prism would normally remove.

+ + 
a.link::before {
+	content: 'I just do my own highlighted';
+	color: #F00;
+}
+ +
+ +
+ + + + + + + + + + + + diff --git a/plugins/filter-highlight-all/prism-filter-highlight-all.js b/plugins/filter-highlight-all/prism-filter-highlight-all.js new file mode 100644 index 0000000000..6bfec21384 --- /dev/null +++ b/plugins/filter-highlight-all/prism-filter-highlight-all.js @@ -0,0 +1,125 @@ +(function () { + + if (typeof self !== 'undefined' && !self.Prism) { + return; + } + + // https://developer.mozilla.org/en-US/docs/Web/API/Element/matches#Polyfill + if (!Element.prototype.matches) { + Element.prototype.matches = Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector; + } + + var script = Prism.util.currentScript(); + + + /** + * @type {Array<(element: HTMLElement) => boolean>} + */ + var filters = []; + + var config = Prism.plugins.filterHighlightAll = { + + /** + * Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements for + * which the given function returns `true` will be highlighted. + * + * @param {(value: { element: HTMLElement, language: string }) => boolean} condition + */ + add: function (condition) { + filters.push(function (element) { + return condition({ + element: element, + language: Prism.util.getLanguage(element) + }); + }); + }, + + /** + * Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements that + * match the given CSS selection will be highlighted. + * + * @param {string} selector + */ + addSelector: function (selector) { + filters.push(function (element) { + return element.matches(selector); + }); + }, + + reject: { + + /** + * Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements for + * which the given function returns `false` will be highlighted. + * + * @param {(value: { element: HTMLElement, language: string }) => boolean} condition + */ + add: function (condition) { + filters.push(function (element) { + return !condition({ + element: element, + language: Prism.util.getLanguage(element) + }); + }); + }, + + /** + * Adds a new filter for the elements of `highlightAll` and `highlightAllUnder` such that only elements that do + * not match the given CSS selection will be highlighted. + * + * @param {string} selector + */ + addSelector: function (selector) { + filters.push(function (element) { + return !element.matches(selector); + }); + }, + + }, + + /** + * Filters the elements of `highlightAll` and `highlightAllUnder` such that only elements with a known language + * will be highlighted. All elements with an unset or unknown language will be ignored. + * + * __Note:__ This will effectively disable the AutoLoader plugin. + * + * @type {boolean} + */ + filterKnown: !!script && script.hasAttribute('data-filter-known') + }; + + config.add(function filterKnown(env) { + return !config.filterKnown || typeof Prism.languages[env.language] === 'object'; + }); + + if (script) { + var attr; + if (attr = script.getAttribute('data-filter-selector')) { + config.addSelector(attr); + } + if (attr = script.getAttribute('data-reject-selector')) { + config.reject.addSelector(attr); + } + } + + /** + * Applies all filters to the given element and returns true if and only if every filter returned true on the + * given element. + * + * @param {HTMLElement} element + * @returns {boolean} + */ + function combinedFilter(element) { + for (var i = 0, l = filters.length; i < l; i++) { + if (!filters[i](element)) { + return false; + } + } + return true; + } + + Prism.hooks.add('before-all-elements-highlight', function (env) { + env.elements = env.elements.filter(combinedFilter); + }); + +}()); diff --git a/plugins/filter-highlight-all/prism-filter-highlight-all.min.js b/plugins/filter-highlight-all/prism-filter-highlight-all.min.js new file mode 100644 index 0000000000..8e5a143591 --- /dev/null +++ b/plugins/filter-highlight-all/prism-filter-highlight-all.min.js @@ -0,0 +1 @@ +!function(){if("undefined"==typeof self||self.Prism){Element.prototype.matches||(Element.prototype.matches=Element.prototype.msMatchesSelector||Element.prototype.webkitMatchesSelector);var e,t=Prism.util.currentScript(),r=[],n=Prism.plugins.filterHighlightAll={add:function(t){r.push(function(e){return t({element:e,language:Prism.util.getLanguage(e)})})},addSelector:function(t){r.push(function(e){return e.matches(t)})},reject:{add:function(t){r.push(function(e){return!t({element:e,language:Prism.util.getLanguage(e)})})},addSelector:function(t){r.push(function(e){return!e.matches(t)})}},filterKnown:!!t&&t.hasAttribute("data-filter-known")};if(n.add(function(e){return!n.filterKnown||"object"==typeof Prism.languages[e.language]}),t)(e=t.getAttribute("data-filter-selector"))&&n.addSelector(e),(e=t.getAttribute("data-reject-selector"))&&n.reject.addSelector(e);Prism.hooks.add("before-all-elements-highlight",function(e){e.elements=e.elements.filter(i)})}function i(e){for(var t=0,n=r.length;t