kmx.io/prism.js

diff --git a/plugins/copy-to-clipboard/prism-copy-to-clipboard.js b/plugins/copy-to-clipboard/prism-copy-to-clipboard.js
index ac73efe..ce52a79 100644
--- a/plugins/copy-to-clipboard/prism-copy-to-clipboard.js
+++ b/plugins/copy-to-clipboard/prism-copy-to-clipboard.js
@@ -39,6 +39,8 @@
 		var linkCopy = document.createElement('button');
 		linkCopy.textContent = 'Copy';
 
+		var element = env.element;
+
 		if (!ClipboardJS) {
 			callbacks.push(registerClipboard);
 		} else {
@@ -50,7 +52,7 @@
 		function registerClipboard() {
 			var clip = new ClipboardJS(linkCopy, {
 				'text': function () {
-					return env.code;
+					return element.textContent;
 				}
 			});
 
diff --git a/plugins/copy-to-clipboard/prism-copy-to-clipboard.min.js b/plugins/copy-to-clipboard/prism-copy-to-clipboard.min.js
index 199b425..3c8b525 100644
--- a/plugins/copy-to-clipboard/prism-copy-to-clipboard.min.js
+++ b/plugins/copy-to-clipboard/prism-copy-to-clipboard.min.js
@@ -1 +1 @@
-!function(){if("undefined"!=typeof self&&self.Prism&&self.document)if(Prism.plugins.toolbar){var r=window.ClipboardJS||void 0;r||"function"!=typeof require||(r=require("clipboard"));var i=[];if(!r){var o=document.createElement("script"),e=document.querySelector("head");o.onload=function(){if(r=window.ClipboardJS)for(;i.length;)i.pop()()},o.src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.0/clipboard.min.js",e.appendChild(o)}Prism.plugins.toolbar.registerButton("copy-to-clipboard",function(e){var t=document.createElement("button");return t.textContent="Copy",r?o():i.push(o),t;function o(){var o=new r(t,{text:function(){return e.code}});o.on("success",function(){t.textContent="Copied!",n()}),o.on("error",function(){t.textContent="Press Ctrl+C to copy",n()})}function n(){setTimeout(function(){t.textContent="Copy"},5e3)}})}else console.warn("Copy to Clipboard plugin loaded before Toolbar plugin.")}();
\ No newline at end of file
+!function(){if("undefined"!=typeof self&&self.Prism&&self.document)if(Prism.plugins.toolbar){var i=window.ClipboardJS||void 0;i||"function"!=typeof require||(i=require("clipboard"));var c=[];if(!i){var o=document.createElement("script"),t=document.querySelector("head");o.onload=function(){if(i=window.ClipboardJS)for(;c.length;)c.pop()()},o.src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.0/clipboard.min.js",t.appendChild(o)}Prism.plugins.toolbar.registerButton("copy-to-clipboard",function(o){var t=document.createElement("button");t.textContent="Copy";var e=o.element;return i?n():c.push(n),t;function n(){var o=new i(t,{text:function(){return e.textContent}});o.on("success",function(){t.textContent="Copied!",r()}),o.on("error",function(){t.textContent="Press Ctrl+C to copy",r()})}function r(){setTimeout(function(){t.textContent="Copy"},5e3)}})}else console.warn("Copy to Clipboard plugin loaded before Toolbar plugin.")}();
\ No newline at end of file
diff --git a/plugins/file-highlight/prism-file-highlight.js b/plugins/file-highlight/prism-file-highlight.js
index 47f2278..93db3ac 100644
--- a/plugins/file-highlight/prism-file-highlight.js
+++ b/plugins/file-highlight/prism-file-highlight.js
@@ -1,89 +1,141 @@
 (function () {
-	if (typeof self === 'undefined' || !self.Prism || !self.document || !document.querySelector) {
+	if (typeof self === 'undefined' || !self.Prism || !self.document) {
 		return;
 	}
 
+	var Prism = window.Prism;
+
+	var LOADING_MESSAGE = 'Loading…';
+	var FAILURE_MESSAGE = function (status, message) {
+		return '✖ Error ' + status + ' while fetching file: ' + message;
+	};
+	var FAILURE_EMPTY_MESSAGE = '✖ Error: File does not exist or is empty';
+
+	var EXTENSIONS = {
+		'js': 'javascript',
+		'py': 'python',
+		'rb': 'ruby',
+		'ps1': 'powershell',
+		'psm1': 'powershell',
+		'sh': 'bash',
+		'bat': 'batch',
+		'h': 'c',
+		'tex': 'latex'
+	};
+
+	var STATUS_ATTR = 'data-src-status';
+	var STATUS_LOADING = 'loading';
+	var STATUS_LOADED = 'loaded';
+	var STATUS_FAILED = 'failed';
+
+	var SELECTOR = 'pre[data-src]:not([' + STATUS_ATTR + '="' + STATUS_LOADED + '"])'
+		+ ':not([' + STATUS_ATTR + '="' + STATUS_LOADING + '"])';
+
+	var lang = /\blang(?:uage)?-([\w-]+)\b/i;
+
 	/**
-	 * @param {Element} [container=document]
+	 * Sets the Prism `language-xxxx` or `lang-xxxx` class to the given language.
+	 *
+	 * @param {HTMLElement} element
+	 * @param {string} language
+	 * @returns {void}
 	 */
-	self.Prism.fileHighlight = function(container) {
-		container = container || document;
-
-		var Extensions = {
-			'js': 'javascript',
-			'py': 'python',
-			'rb': 'ruby',
-			'ps1': 'powershell',
-			'psm1': 'powershell',
-			'sh': 'bash',
-			'bat': 'batch',
-			'h': 'c',
-			'tex': 'latex'
-		};
-
-		Array.prototype.slice.call(container.querySelectorAll('pre[data-src]')).forEach(function (pre) {
-			// ignore if already loaded
-			if (pre.hasAttribute('data-src-loaded')) {
-				return;
-			}
+	function setLanguageClass(element, language) {
+		var className = element.className;
+		className = className.replace(lang, ' ') + ' language-' + language;
+		element.className = className.replace(/\s+/g, ' ').trim();
+	}
 
-			// load current
-			var src = pre.getAttribute('data-src');
 
-			var language, parent = pre;
-			var lang = /\blang(?:uage)?-([\w-]+)\b/i;
-			while (parent && !lang.test(parent.className)) {
-				parent = parent.parentNode;
-			}
+	Prism.hooks.add('before-highlightall', function (env) {
+		env.selector += ', ' + SELECTOR;
+	});
 
-			if (parent) {
-				language = (pre.className.match(lang) || [, ''])[1];
-			}
+	Prism.hooks.add('before-sanity-check', function (env) {
+		var pre = /** @type {HTMLPreElement} */ (env.element);
+		if (pre.matches(SELECTOR)) {
+			env.code = ''; // fast-path the whole thing and go to complete
 
-			if (!language) {
-				var extension = (src.match(/\.(\w+)$/) || [, ''])[1];
-				language = Extensions[extension] || extension;
-			}
+			pre.setAttribute(STATUS_ATTR, STATUS_LOADING); // mark as loading
 
-			var code = document.createElement('code');
-			code.className = 'language-' + language;
+			// add code element with loading message
+			var code = pre.appendChild(document.createElement('CODE'));
+			code.textContent = LOADING_MESSAGE;
 
-			pre.textContent = '';
+			var src = pre.getAttribute('data-src');
 
-			code.textContent = 'Loading…';
+			var language = env.language;
+			if (language === 'none') {
+				// the language might be 'none' because there is no language set;
+				// in this case, we want to use the extension as the language
+				var extension = (/\.(\w+)$/.exec(src) || [, 'none'])[1];
+				language = EXTENSIONS[extension] || extension;
+			}
 
-			pre.appendChild(code);
+			// set language classes
+			setLanguageClass(code, language);
+			setLanguageClass(pre, language);
 
-			var xhr = new XMLHttpRequest();
+			// preload the language
+			var autoloader = Prism.plugins.autoloader;
+			if (autoloader) {
+				autoloader.loadLanguages(language);
+			}
 
+			// load file
+			var xhr = new XMLHttpRequest();
 			xhr.open('GET', src, true);
-
 			xhr.onreadystatechange = function () {
 				if (xhr.readyState == 4) {
-
 					if (xhr.status < 400 && xhr.responseText) {
-						code.textContent = xhr.responseText;
+						// mark as loaded
+						pre.setAttribute(STATUS_ATTR, STATUS_LOADED);
 
+						// highlight code
+						code.textContent = xhr.responseText;
 						Prism.highlightElement(code);
-						// mark as loaded
-						pre.setAttribute('data-src-loaded', '');
-					}
-					else if (xhr.status >= 400) {
-						code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
-					}
-					else {
-						code.textContent = '✖ Error: File does not exist or is empty';
+
+					} else {
+						// mark as failed
+						pre.setAttribute(STATUS_ATTR, STATUS_FAILED);
+
+						if (xhr.status >= 400) {
+							code.textContent = FAILURE_MESSAGE(xhr.status, xhr.statusText);
+						} else {
+							code.textContent = FAILURE_EMPTY_MESSAGE;
+						}
 					}
 				}
 			};
-
 			xhr.send(null);
-		});
+		}
+	});
+
+	Prism.plugins.fileHighlight = {
+		/**
+		 * Executes the File Highlight plugin for all matching `pre` elements under the given container.
+		 *
+		 * Note: Elements which are already loaded or currently loading will not be touched by this method.
+		 *
+		 * @param {ParentNode} [container=document]
+		 */
+		highlight: function highlight(container) {
+			var elements = (container || document).querySelectorAll(SELECTOR);
+
+			for (var i = 0, element; element = elements[i++];) {
+				Prism.highlightElement(element);
+			}
+		}
 	};
 
-	document.addEventListener('DOMContentLoaded', function () {
-		// execute inside handler, for dropping Event as argument
-		self.Prism.fileHighlight();
-	});
+	var logged = false;
+	/** @deprecated Use `Prism.plugins.fileHighlight.highlight` instead. */
+	Prism.fileHighlight = function () {
+		if (!logged) {
+			console.warn('Prism.fileHighlight is deprecated. Use `Prism.plugins.fileHighlight.highlight` instead.');
+			logged = true;
+		}
+		Prism.plugins.fileHighlight.highlight.apply(this, arguments);
+	}
 
 })();
diff --git a/plugins/file-highlight/prism-file-highlight.min.js b/plugins/file-highlight/prism-file-highlight.min.js
index fae37e1..843072d 100644
--- a/plugins/file-highlight/prism-file-highlight.min.js
+++ b/plugins/file-highlight/prism-file-highlight.min.js
@@ -1 +1 @@
-"undefined"!=typeof self&&self.Prism&&self.document&&document.querySelector&&(self.Prism.fileHighlight=function(e){e=e||document;var i={js:"javascript",py:"python",rb:"ruby",ps1:"powershell",psm1:"powershell",sh:"bash",bat:"batch",h:"c",tex:"latex"};Array.prototype.slice.call(e.querySelectorAll("pre[data-src]")).forEach(function(e){if(!e.hasAttribute("data-src-loaded")){for(var t,a=e.getAttribute("data-src"),s=e,n=/\blang(?:uage)?-([\w-]+)\b/i;s&&!n.test(s.className);)s=s.parentNode;if(s&&(t=(e.className.match(n)||[,""])[1]),!t){var r=(a.match(/\.(\w+)$/)||[,""])[1];t=i[r]||r}var o=document.createElement("code");o.className="language-"+t,e.textContent="",o.textContent="Loading…",e.appendChild(o);var l=new XMLHttpRequest;l.open("GET",a,!0),l.onreadystatechange=function(){4==l.readyState&&(l.status<400&&l.responseText?(o.textContent=l.responseText,Prism.highlightElement(o),e.setAttribute("data-src-loaded","")):400<=l.status?o.textContent="✖ Error "+l.status+" while fetching file: "+l.statusText:o.textContent="✖ Error: File does not exist or is empty")},l.send(null)}})},document.addEventListener("DOMContentLoaded",function(){self.Prism.fileHighlight()}));
\ No newline at end of file
+!function(){if("undefined"!=typeof self&&self.Prism&&self.document){var o=window.Prism,h={js:"javascript",py:"python",rb:"ruby",ps1:"powershell",psm1:"powershell",sh:"bash",bat:"batch",h:"c",tex:"latex"},g="data-src-status",u="loading",c="loaded",d="pre[data-src]:not(["+g+'="'+c+'"]):not(['+g+'="'+u+'"])',n=/\blang(?:uage)?-([\w-]+)\b/i;o.hooks.add("before-highlightall",function(e){e.selector+=", "+d}),o.hooks.add("before-sanity-check",function(e){var t=e.element;if(t.matches(d)){e.code="",t.setAttribute(g,u);var i=t.appendChild(document.createElement("CODE"));i.textContent="Loading…";var n=t.getAttribute("data-src"),a=e.language;if("none"===a){var s=(/\.(\w+)$/.exec(n)||[,"none"])[1];a=h[s]||s}f(i,a),f(t,a);var l=o.plugins.autoloader;l&&l.loadLanguages(a);var r=new XMLHttpRequest;r.open("GET",n,!0),r.onreadystatechange=function(){4==r.readyState&&(r.status<400&&r.responseText?(t.setAttribute(g,c),i.textContent=r.responseText,o.highlightElement(i)):(t.setAttribute(g,"failed"),400<=r.status?i.textContent=function(e,t){return"✖ Error "+e+" while fetching file: "+t}(r.status,r.statusText):i.textContent="✖ Error: File does not exist or is empty"))},r.send(null)}});var e=!(o.plugins.fileHighlight={highlight:function(e){for(var t,i=(e||document).querySelectorAll(d),n=0;t=i[n++];)o.highlightElement(t)}});o.fileHighlight=function(){e||(console.warn("Prism.fileHighlight is deprecated. Use `Prism.plugins.fileHighlight.highlight` instead."),e=!0),o.plugins.fileHighlight.highlight.apply(this,arguments)}}function f(e,t){var i=e.className;i=i.replace(n," ")+" language-"+t,e.className=i.replace(/\s+/g," ").trim()}}();
\ No newline at end of file
diff --git a/plugins/jsonp-highlight/prism-jsonp-highlight.js b/plugins/jsonp-highlight/prism-jsonp-highlight.js
index 5f0d68b..3312e99 100644
--- a/plugins/jsonp-highlight/prism-jsonp-highlight.js
+++ b/plugins/jsonp-highlight/prism-jsonp-highlight.js
@@ -1,11 +1,13 @@
 (function () {
-	if (!self.Prism || !self.document || !document.querySelectorAll || ![].filter) return;
+	if (typeof self === 'undefined' || !self.Prism || !self.document) {
+		return;
+	}
 
 	/**
 	 * @callback Adapter
 	 * @param {any} response
 	 * @param {HTMLPreElement} [pre]
-	 * @returns {string}
+	 * @returns {string | null}
 	 */
 
 	/**
@@ -66,7 +68,9 @@
 			adapter = getAdapter(adapter);
 		}
 		if (typeof adapter === "function") {
-			var index = adapters.map(function (item) { return item.adapter; }).indexOf(adapter);
+			var index = adapters.findIndex(function (item) {
+				return item.adapter === adapter;
+			});
 			if (index >= 0) {
 				adapters.splice(index, 1);
 			}
@@ -120,63 +124,101 @@
 		return null;
 	}, 'bitbucket');
 
-	var jsonpcb = 0,
-		loadMsg = "Loading\u2026";
 
-	/**
-	 * Highlights all `pre` elements with an `data-jsonp` by requesting the specified JSON and using the specified adapter
-	 * or a registered adapter to extract the code to highlight from the response. The highlighted code will be inserted
-	 * into the `pre` element.
-	 */
-	function highlight() {
-		Array.prototype.slice.call(document.querySelectorAll("pre[data-jsonp]")).forEach(function (pre) {
-			pre.textContent = "";
+	var jsonpCallbackCounter = 0;
+
+	var LOADING_MESSAGE = 'Loading…';
+	var MISSING_ADAPTER_MESSAGE = function (name) {
+		return '✖ Error: JSONP adapter function "' + name + '" doesn\'t exist';
+	};
+	var TIMEOUT_MESSAGE = function (url) {
+		return '✖ Error: Timeout loading ' + url;
+	};
+	var UNKNOWN_FAILURE_MESSAGE = '✖ Error: Cannot parse response (perhaps you need an adapter function?)';
+
+	var STATUS_ATTR = 'data-jsonp-status';
+	var STATUS_LOADING = 'loading';
+	var STATUS_LOADED = 'loaded';
+	var STATUS_FAILED = 'failed';
+
+	var SELECTOR = 'pre[data-jsonp]:not([' + STATUS_ATTR + '="' + STATUS_LOADED + '"])'
+		+ ':not([' + STATUS_ATTR + '="' + STATUS_LOADING + '"])';
+
 
-			var code = document.createElement("code");
-			code.textContent = loadMsg;
-			pre.appendChild(code);
+	Prism.hooks.add('before-highlightall', function (env) {
+		env.selector += ', ' + SELECTOR;
+	});
 
-			var adapterName = pre.getAttribute("data-adapter");
+	Prism.hooks.add('before-sanity-check', function (env) {
+		var pre = /** @type {HTMLPreElement} */ (env.element);
+		if (pre.matches(SELECTOR)) {
+			env.code = ''; // fast-path the whole thing and go to complete
+
+			// mark as loading
+			pre.setAttribute(STATUS_ATTR, STATUS_LOADING);
+
+			// add code element with loading message
+			var code = pre.appendChild(document.createElement('CODE'));
+			code.textContent = LOADING_MESSAGE;
+
+			// set language
+			var language = env.language;
+			code.className = 'language-' + language;
+
+			// preload the language
+			var autoloader = Prism.plugins.autoloader;
+			if (autoloader) {
+				autoloader.loadLanguages(language);
+			}
+
+			var adapterName = pre.getAttribute('data-adapter');
 			var adapter = null;
 			if (adapterName) {
-				if (typeof window[adapterName] === "function") {
+				if (typeof window[adapterName] === 'function') {
 					adapter = window[adapterName];
-				}
-				else {
-					code.textContent = "JSONP adapter function '" + adapterName + "' doesn't exist";
+				} else {
+					// mark as failed
+					pre.setAttribute(STATUS_ATTR, STATUS_FAILED);
+
+					code.textContent = MISSING_ADAPTER_MESSAGE(adapterName);
 					return;
 				}
 			}
 
-			var cb = "prismjsonp" + jsonpcb++;
+			var callbackName = 'prismjsonp' + jsonpCallbackCounter++;
+
+			var uri = document.createElement('a');
+			var src = uri.href = pre.getAttribute('data-jsonp');
+			uri.href += (uri.search ? '&' : '?') + (pre.getAttribute('data-callback') || 'callback') + '=' + callbackName;
 
-			var uri = document.createElement("a");
-			var src = uri.href = pre.getAttribute("data-jsonp");
-			uri.href += (uri.search ? "&" : "?") + (pre.getAttribute("data-callback") || "callback") + "=" + cb;
 
 			var timeout = setTimeout(function () {
 				// we could clean up window[cb], but if the request finally succeeds, keeping it around is a good thing
-				if (code.textContent === loadMsg) {
-					code.textContent = "Timeout loading '" + src + "'";
-				}
-			}, 5000);
 
-			var script = document.createElement("script");
+				// mark as failed
+				pre.setAttribute(STATUS_ATTR, STATUS_FAILED);
+
+				code.textContent = TIMEOUT_MESSAGE(src);
+			}, Prism.plugins.jsonphighlight.timeout);
+
+
+			var script = document.createElement('script');
 			script.src = uri.href;
 
-			window[cb] = function (rsp) {
+			// the JSONP callback function
+			window[callbackName] = function (response) {
+				// clean up
 				document.head.removeChild(script);
 				clearTimeout(timeout);
-				delete window[cb];
-
-				var data = "";
+				delete window[callbackName];
 
+				// interpret the received data using the adapter(s)
+				var data = null;
 				if (adapter) {
-					data = adapter(rsp, pre);
-				}
-				else {
-					for (var p in adapters) {
-						data = adapters[p].adapter(rsp, pre);
+					data = adapter(response, pre);
+				} else {
+					for (var i = 0, l = adapters.length; i < l; i++) {
+						data = adapters[i].adapter(response, pre);
 						if (data !== null) {
 							break;
 						}
@@ -184,23 +226,51 @@
 				}
 
 				if (data === null) {
-					code.textContent = "Cannot parse response (perhaps you need an adapter function?)";
-				}
-				else {
+					// mark as failed
+					pre.setAttribute(STATUS_ATTR, STATUS_FAILED);
+
+					code.textContent = UNKNOWN_FAILURE_MESSAGE;
+				} else {
+					// mark as loaded
+					pre.setAttribute(STATUS_ATTR, STATUS_LOADED);
+
 					code.textContent = data;
 					Prism.highlightElement(code);
 				}
 			};
 
 			document.head.appendChild(script);
-		});
-	}
+		}
+	});
+
 
 	Prism.plugins.jsonphighlight = {
+		/**
+		 * The timeout after which an error message will be displayed.
+		 *
+		 * __Note:__ If the request succeeds after the timeout, it will still be processed and will override any
+		 * displayed error messages.
+		 */
+		timeout: 5000,
 		registerAdapter: registerAdapter,
 		removeAdapter: removeAdapter,
-		highlight: highlight
+
+		/**
+		 * Highlights all `pre` elements under the given container with a `data-jsonp` attribute by requesting the
+		 * specified JSON and using the specified adapter or a registered adapter to extract the code to highlight
+		 * from the response. The highlighted code will be inserted into the `pre` element.
+		 *
+		 * Note: Elements which are already loaded or currently loading will not be touched by this method.
+		 *
+		 * @param {Element | Document} [container=document]
+		 */
+		highlight: function (container) {
+			var elements = (container || document).querySelectorAll(SELECTOR);
+
+			for (var i = 0, element; element = elements[i++];) {
+				Prism.highlightElement(element);
+			}
+		}
 	};
 
-	highlight();
 })();
diff --git a/plugins/jsonp-highlight/prism-jsonp-highlight.min.js b/plugins/jsonp-highlight/prism-jsonp-highlight.min.js
index f969cf4..e647679 100644
--- a/plugins/jsonp-highlight/prism-jsonp-highlight.min.js
+++ b/plugins/jsonp-highlight/prism-jsonp-highlight.min.js
@@ -1 +1 @@
-!function(){if(self.Prism&&self.document&&document.querySelectorAll&&[].filter){var d=[];t(function(t,e){if(t&&t.meta&&t.data){if(t.meta.status&&400<=t.meta.status)return"Error: "+(t.data.message||t.meta.status);if("string"==typeof t.data.content)return"function"==typeof atob?atob(t.data.content.replace(/\s/g,"")):"Your browser cannot decode base64"}return null},"github"),t(function(t,e){if(t&&t.meta&&t.data&&t.data.files){if(t.meta.status&&400<=t.meta.status)return"Error: "+(t.data.message||t.meta.status);var n=t.data.files,a=e.getAttribute("data-filename");if(null==a)for(var r in n)if(n.hasOwnProperty(r)){a=r;break}return void 0!==n[a]?n[a].content:"Error: unknown or missing gist file "+a}return null},"gist"),t(function(t,e){return t&&t.node&&"string"==typeof t.data?t.data:null},"bitbucket");var s=0,l="Loading…";Prism.plugins.jsonphighlight={registerAdapter:t,removeAdapter:function(t){if("string"==typeof t&&(t=n(t)),"function"==typeof t){var e=d.map(function(t){return t.adapter}).indexOf(t);0<=e&&d.splice(e,1)}},highlight:e},e()}function t(t,e){e=e||t.name,"function"!=typeof t||n(t)||n(e)||d.push({adapter:t,name:e})}function n(t){if("function"==typeof t){for(var e=0;n=d[e++];)if(n.adapter.valueOf()===t.valueOf())return n.adapter}else if("string"==typeof t){var n;for(e=0;n=d[e++];)if(n.name===t)return n.adapter}return null}function e(){Array.prototype.slice.call(document.querySelectorAll("pre[data-jsonp]")).forEach(function(a){a.textContent="";var r=document.createElement("code");r.textContent=l,a.appendChild(r);var t=a.getAttribute("data-adapter"),o=null;if(t){if("function"!=typeof window[t])return void(r.textContent="JSONP adapter function '"+t+"' doesn't exist");o=window[t]}var i="prismjsonp"+s++,e=document.createElement("a"),n=e.href=a.getAttribute("data-jsonp");e.href+=(e.search?"&":"?")+(a.getAttribute("data-callback")||"callback")+"="+i;var u=setTimeout(function(){r.textContent===l&&(r.textContent="Timeout loading '"+n+"'")},5e3),f=document.createElement("script");f.src=e.href,window[i]=function(t){document.head.removeChild(f),clearTimeout(u),delete window[i];var e="";if(o)e=o(t,a);else for(var n in d)if(null!==(e=d[n].adapter(t,a)))break;null===e?r.textContent="Cannot parse response (perhaps you need an adapter function?)":(r.textContent=e,Prism.highlightElement(r))},document.head.appendChild(f)})}}();
\ No newline at end of file
+!function(){if("undefined"!=typeof self&&self.Prism&&self.document){var c=[];t(function(t,e){if(t&&t.meta&&t.data){if(t.meta.status&&400<=t.meta.status)return"Error: "+(t.data.message||t.meta.status);if("string"==typeof t.data.content)return"function"==typeof atob?atob(t.data.content.replace(/\s/g,"")):"Your browser cannot decode base64"}return null},"github"),t(function(t,e){if(t&&t.meta&&t.data&&t.data.files){if(t.meta.status&&400<=t.meta.status)return"Error: "+(t.data.message||t.meta.status);var n=t.data.files,a=e.getAttribute("data-filename");if(null==a)for(var r in n)if(n.hasOwnProperty(r)){a=r;break}return void 0!==n[a]?n[a].content:"Error: unknown or missing gist file "+a}return null},"gist"),t(function(t,e){return t&&t.node&&"string"==typeof t.data?t.data:null},"bitbucket");var m=0,p="data-jsonp-status",g="loading",h="loaded",v="failed",b="pre[data-jsonp]:not(["+p+'="'+h+'"]):not(['+p+'="'+g+'"])';Prism.hooks.add("before-highlightall",function(t){t.selector+=", "+b}),Prism.hooks.add("before-sanity-check",function(t){var r=t.element;if(r.matches(b)){t.code="",r.setAttribute(p,g);var i=r.appendChild(document.createElement("CODE"));i.textContent="Loading…";var e=t.language;i.className="language-"+e;var n=Prism.plugins.autoloader;n&&n.loadLanguages(e);var a=r.getAttribute("data-adapter"),o=null;if(a){if("function"!=typeof window[a])return r.setAttribute(p,v),void(i.textContent=function(t){return'✖ Error: JSONP adapter function "'+t+"\" doesn't exist"}(a));o=window[a]}var u="prismjsonp"+m++,s=document.createElement("a"),f=s.href=r.getAttribute("data-jsonp");s.href+=(s.search?"&":"?")+(r.getAttribute("data-callback")||"callback")+"="+u;var l=setTimeout(function(){r.setAttribute(p,v),i.textContent=function(t){return"✖ Error: Timeout loading "+t}(f)},Prism.plugins.jsonphighlight.timeout),d=document.createElement("script");d.src=s.href,window[u]=function(t){document.head.removeChild(d),clearTimeout(l),delete window[u];var e=null;if(o)e=o(t,r);else for(var n=0,a=c.length;n<a&&null===(e=c[n].adapter(t,r));n++);null===e?(r.setAttribute(p,v),i.textContent="✖ Error: Cannot parse response (perhaps you need an adapter function?)"):(r.setAttribute(p,h),i.textContent=e,Prism.highlightElement(i))},document.head.appendChild(d)}}),Prism.plugins.jsonphighlight={timeout:5e3,registerAdapter:t,removeAdapter:function(e){if("string"==typeof e&&(e=n(e)),"function"==typeof e){var t=c.findIndex(function(t){return t.adapter===e});0<=t&&c.splice(t,1)}},highlight:function(t){for(var e,n=(t||document).querySelectorAll(b),a=0;e=n[a++];)Prism.highlightElement(e)}}}function t(t,e){e=e||t.name,"function"!=typeof t||n(t)||n(e)||c.push({adapter:t,name:e})}function n(t){if("function"==typeof t){for(var e=0;n=c[e++];)if(n.adapter.valueOf()===t.valueOf())return n.adapter}else if("string"==typeof t){var n;for(e=0;n=c[e++];)if(n.name===t)return n.adapter}return null}}();
\ No newline at end of file
diff --git a/prism.js b/prism.js
index c1dc95c..336152f 100644
--- a/prism.js
+++ b/prism.js
@@ -1527,91 +1527,143 @@ Prism.languages.js = Prism.languages.javascript;
 ********************************************** */
 
 (function () {
-	if (typeof self === 'undefined' || !self.Prism || !self.document || !document.querySelector) {
+	if (typeof self === 'undefined' || !self.Prism || !self.document) {
 		return;
 	}
 
+	var Prism = window.Prism;
+
+	var LOADING_MESSAGE = 'Loading…';
+	var FAILURE_MESSAGE = function (status, message) {
+		return '✖ Error ' + status + ' while fetching file: ' + message;
+	};
+	var FAILURE_EMPTY_MESSAGE = '✖ Error: File does not exist or is empty';
+
+	var EXTENSIONS = {
+		'js': 'javascript',
+		'py': 'python',
+		'rb': 'ruby',
+		'ps1': 'powershell',
+		'psm1': 'powershell',
+		'sh': 'bash',
+		'bat': 'batch',
+		'h': 'c',
+		'tex': 'latex'
+	};
+
+	var STATUS_ATTR = 'data-src-status';
+	var STATUS_LOADING = 'loading';
+	var STATUS_LOADED = 'loaded';
+	var STATUS_FAILED = 'failed';
+
+	var SELECTOR = 'pre[data-src]:not([' + STATUS_ATTR + '="' + STATUS_LOADED + '"])'
+		+ ':not([' + STATUS_ATTR + '="' + STATUS_LOADING + '"])';
+
+	var lang = /\blang(?:uage)?-([\w-]+)\b/i;
+
 	/**
-	 * @param {Element} [container=document]
+	 * Sets the Prism `language-xxxx` or `lang-xxxx` class to the given language.
+	 *
+	 * @param {HTMLElement} element
+	 * @param {string} language
+	 * @returns {void}
 	 */
-	self.Prism.fileHighlight = function(container) {
-		container = container || document;
-
-		var Extensions = {
-			'js': 'javascript',
-			'py': 'python',
-			'rb': 'ruby',
-			'ps1': 'powershell',
-			'psm1': 'powershell',
-			'sh': 'bash',
-			'bat': 'batch',
-			'h': 'c',
-			'tex': 'latex'
-		};
+	function setLanguageClass(element, language) {
+		var className = element.className;
+		className = className.replace(lang, ' ') + ' language-' + language;
+		element.className = className.replace(/\s+/g, ' ').trim();
+	}
 
-		Array.prototype.slice.call(container.querySelectorAll('pre[data-src]')).forEach(function (pre) {
-			// ignore if already loaded
-			if (pre.hasAttribute('data-src-loaded')) {
-				return;
-			}
 
-			// load current
-			var src = pre.getAttribute('data-src');
+	Prism.hooks.add('before-highlightall', function (env) {
+		env.selector += ', ' + SELECTOR;
+	});
 
-			var language, parent = pre;
-			var lang = /\blang(?:uage)?-([\w-]+)\b/i;
-			while (parent && !lang.test(parent.className)) {
-				parent = parent.parentNode;
-			}
+	Prism.hooks.add('before-sanity-check', function (env) {
+		var pre = /** @type {HTMLPreElement} */ (env.element);
+		if (pre.matches(SELECTOR)) {
+			env.code = ''; // fast-path the whole thing and go to complete
 
-			if (parent) {
-				language = (pre.className.match(lang) || [, ''])[1];
-			}
+			pre.setAttribute(STATUS_ATTR, STATUS_LOADING); // mark as loading
 
-			if (!language) {
-				var extension = (src.match(/\.(\w+)$/) || [, ''])[1];
-				language = Extensions[extension] || extension;
-			}
+			// add code element with loading message
+			var code = pre.appendChild(document.createElement('CODE'));
+			code.textContent = LOADING_MESSAGE;
 
-			var code = document.createElement('code');
-			code.className = 'language-' + language;
+			var src = pre.getAttribute('data-src');
 
-			pre.textContent = '';
+			var language = env.language;
+			if (language === 'none') {
+				// the language might be 'none' because there is no language set;
+				// in this case, we want to use the extension as the language
+				var extension = (/\.(\w+)$/.exec(src) || [, 'none'])[1];
+				language = EXTENSIONS[extension] || extension;
+			}
 
-			code.textContent = 'Loading…';
+			// set language classes
+			setLanguageClass(code, language);
+			setLanguageClass(pre, language);
 
-			pre.appendChild(code);
+			// preload the language
+			var autoloader = Prism.plugins.autoloader;
+			if (autoloader) {
+				autoloader.loadLanguages(language);
+			}
 
+			// load file
 			var xhr = new XMLHttpRequest();
-
 			xhr.open('GET', src, true);
-
 			xhr.onreadystatechange = function () {
 				if (xhr.readyState == 4) {
-
 					if (xhr.status < 400 && xhr.responseText) {
-						code.textContent = xhr.responseText;
+						// mark as loaded
+						pre.setAttribute(STATUS_ATTR, STATUS_LOADED);
 
+						// highlight code
+						code.textContent = xhr.responseText;
 						Prism.highlightElement(code);
-						// mark as loaded
-						pre.setAttribute('data-src-loaded', '');
-					}
-					else if (xhr.status >= 400) {
-						code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
-					}
-					else {
-						code.textContent = '✖ Error: File does not exist or is empty';
+
+					} else {
+						// mark as failed
+						pre.setAttribute(STATUS_ATTR, STATUS_FAILED);
+
+						if (xhr.status >= 400) {
+							code.textContent = FAILURE_MESSAGE(xhr.status, xhr.statusText);
+						} else {
+							code.textContent = FAILURE_EMPTY_MESSAGE;
+						}
 					}
 				}
 			};
-
 			xhr.send(null);
-		});
+		}
+	});
+
+	Prism.plugins.fileHighlight = {
+		/**
+		 * Executes the File Highlight plugin for all matching `pre` elements under the given container.
+		 *
+		 * Note: Elements which are already loaded or currently loading will not be touched by this method.
+		 *
+		 * @param {ParentNode} [container=document]
+		 */
+		highlight: function highlight(container) {
+			var elements = (container || document).querySelectorAll(SELECTOR);
+
+			for (var i = 0, element; element = elements[i++];) {
+				Prism.highlightElement(element);
+			}
+		}
 	};
 
-	document.addEventListener('DOMContentLoaded', function () {
-		// execute inside handler, for dropping Event as argument
-		self.Prism.fileHighlight();
-	});
+	var logged = false;
+	/** @deprecated Use `Prism.plugins.fileHighlight.highlight` instead. */
+	Prism.fileHighlight = function () {
+		if (!logged) {
+			console.warn('Prism.fileHighlight is deprecated. Use `Prism.plugins.fileHighlight.highlight` instead.');
+			logged = true;
+		}
+		Prism.plugins.fileHighlight.highlight.apply(this, arguments);
+	}
 
 })();