From ed9f2b2179000862f7bc8c01b68676f568daa7c8 Mon Sep 17 00:00:00 2001
From: Golmote <golmote@hotmail.com>
Date: Mon, 17 Aug 2015 08:47:32 +0200
Subject: [PATCH] Move removal of initial line feed to a plugin

---
 components.js                                 |  5 ++
 components/prism-core.js                      |  4 --
 components/prism-core.min.js                  |  2 +-
 plugins/remove-initial-line-feed/index.html   | 57 +++++++++++++++++++
 .../prism-remove-initial-line-feed.js         | 13 +++++
 .../prism-remove-initial-line-feed.min.js     |  1 +
 prism.js                                      |  4 --
 7 files changed, 77 insertions(+), 9 deletions(-)
 create mode 100644 plugins/remove-initial-line-feed/index.html
 create mode 100644 plugins/remove-initial-line-feed/prism-remove-initial-line-feed.js
 create mode 100644 plugins/remove-initial-line-feed/prism-remove-initial-line-feed.min.js

diff --git a/components.js b/components.js
index 919b3c13ae..1129ef8eab 100644
--- a/components.js
+++ b/components.js
@@ -377,6 +377,11 @@ var components = {
 			"title": "Highlight Keywords",
 			"owner": "vkbansal",
 			"noCSS": true
+		},
+		"remove-initial-line-feed": {
+			"title": "Remove initial line feed",
+			"owner": "Golmote",
+			"noCSS": true
 		}
 	}
 };
diff --git a/components/prism-core.js b/components/prism-core.js
index 6b5799350b..fcccccde29 100644
--- a/components/prism-core.js
+++ b/components/prism-core.js
@@ -181,10 +181,6 @@ var _ = _self.Prism = {
 			code: code
 		};
 
-		if(code) {
-			env.code = code.replace(/^(?:\r?\n|\r)/, '');
-		}
-
 		if (!code || !grammar) {
 			_.hooks.run('complete', env);
 			return;
diff --git a/components/prism-core.min.js b/components/prism-core.min.js
index bf3d9c3096..9499c01cf6 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(){var e=/\blang(?:uage)?-(?!\*)(\w+)\b/i,t=_self.Prism={util:{encode:function(e){return e instanceof n?new n(e.type,t.util.encode(e.content),e.alias):"Array"===t.util.type(e)?e.map(t.util.encode):e.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/\u00a0/g," ")},type:function(e){return Object.prototype.toString.call(e).match(/\[object (\w+)\]/)[1]},clone:function(e){var n=t.util.type(e);switch(n){case"Object":var a={};for(var r in e)e.hasOwnProperty(r)&&(a[r]=t.util.clone(e[r]));return a;case"Array":return e.map&&e.map(function(e){return t.util.clone(e)})}return e}},languages:{extend:function(e,n){var a=t.util.clone(t.languages[e]);for(var r in n)a[r]=n[r];return a},insertBefore:function(e,n,a,r){r=r||t.languages;var i=r[e];if(2==arguments.length){a=arguments[1];for(var l in a)a.hasOwnProperty(l)&&(i[l]=a[l]);return i}var o={};for(var s in i)if(i.hasOwnProperty(s)){if(s==n)for(var l in a)a.hasOwnProperty(l)&&(o[l]=a[l]);o[s]=i[s]}return t.languages.DFS(t.languages,function(t,n){n===r[e]&&t!=e&&(this[t]=o)}),r[e]=o},DFS:function(e,n,a){for(var r in e)e.hasOwnProperty(r)&&(n.call(e,r,e[r],a||r),"Object"===t.util.type(e[r])?t.languages.DFS(e[r],n):"Array"===t.util.type(e[r])&&t.languages.DFS(e[r],n,r))}},highlightAll:function(e,n){for(var a,r=document.querySelectorAll('code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'),i=0;a=r[i++];)t.highlightElement(a,e===!0,n)},highlightElement:function(a,r,i){for(var l,o,s=a;s&&!e.test(s.className);)s=s.parentNode;s&&(l=(s.className.match(e)||[,""])[1],o=t.languages[l]),a.className=a.className.replace(e,"").replace(/\s+/g," ")+" language-"+l,s=a.parentNode,/pre/i.test(s.nodeName)&&(s.className=s.className.replace(e,"").replace(/\s+/g," ")+" language-"+l);var u=a.textContent,c={element:a,language:l,grammar:o,code:u};if(u&&(c.code=u.replace(/^(?:\r?\n|\r)/,"")),!u||!o)return t.hooks.run("complete",c),void 0;if(t.hooks.run("before-highlight",c),r&&_self.Worker){var g=new Worker(t.filename);g.onmessage=function(e){c.highlightedCode=n.stringify(JSON.parse(e.data),l),t.hooks.run("before-insert",c),c.element.innerHTML=c.highlightedCode,i&&i.call(c.element),t.hooks.run("after-highlight",c),t.hooks.run("complete",c)},g.postMessage(JSON.stringify({language:c.language,code:c.code}))}else c.highlightedCode=t.highlight(c.code,c.grammar,c.language),t.hooks.run("before-insert",c),c.element.innerHTML=c.highlightedCode,i&&i.call(a),t.hooks.run("after-highlight",c),t.hooks.run("complete",c)},highlight:function(e,a,r){var i=t.tokenize(e,a);return n.stringify(t.util.encode(i),r)},tokenize:function(e,n){var a=t.Token,r=[e],i=n.rest;if(i){for(var l in i)n[l]=i[l];delete n.rest}e:for(var l in n)if(n.hasOwnProperty(l)&&n[l]){var o=n[l];o="Array"===t.util.type(o)?o:[o];for(var s=0;s<o.length;++s){var u=o[s],c=u.inside,g=!!u.lookbehind,f=0,h=u.alias;u=u.pattern||u;for(var p=0;p<r.length;p++){var d=r[p];if(r.length>e.length)break e;if(!(d instanceof a)){u.lastIndex=0;var m=u.exec(d);if(m){g&&(f=m[1].length);var y=m.index-1+f,m=m[0].slice(f),v=m.length,k=y+v,b=d.slice(0,y+1),w=d.slice(k+1),N=[p,1];b&&N.push(b);var O=new a(l,c?t.tokenize(m,c):m,h);N.push(O),w&&N.push(w),Array.prototype.splice.apply(r,N)}}}}}return r},hooks:{all:{},add:function(e,n){var a=t.hooks.all;a[e]=a[e]||[],a[e].push(n)},run:function(e,n){var a=t.hooks.all[e];if(a&&a.length)for(var r,i=0;r=a[i++];)r(n)}}},n=t.Token=function(e,t,n){this.type=e,this.content=t,this.alias=n};if(n.stringify=function(e,a,r){if("string"==typeof e)return e;if("Array"===t.util.type(e))return e.map(function(t){return n.stringify(t,a,e)}).join("");var i={type:e.type,content:n.stringify(e.content,a,r),tag:"span",classes:["token",e.type],attributes:{},language:a,parent:r};if("comment"==i.type&&(i.attributes.spellcheck="true"),e.alias){var l="Array"===t.util.type(e.alias)?e.alias:[e.alias];Array.prototype.push.apply(i.classes,l)}t.hooks.run("wrap",i);var o="";for(var s in i.attributes)o+=s+'="'+(i.attributes[s]||"")+'"';return"<"+i.tag+' class="'+i.classes.join(" ")+'" '+o+">"+i.content+"</"+i.tag+">"},!_self.document)return _self.addEventListener?(_self.addEventListener("message",function(e){var n=JSON.parse(e.data),a=n.language,r=n.code;_self.postMessage(JSON.stringify(t.util.encode(t.tokenize(r,t.languages[a])))),_self.close()},!1),_self.Prism):_self.Prism;var a=document.getElementsByTagName("script");return a=a[a.length-1],a&&(t.filename=a.src,document.addEventListener&&!a.hasAttribute("data-manual")&&document.addEventListener("DOMContentLoaded",t.highlightAll)),_self.Prism}();"undefined"!=typeof module&&module.exports&&(module.exports=Prism);
\ No newline at end of file
+var _self="undefined"!=typeof window?window:"undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?self:{},Prism=function(){var e=/\blang(?:uage)?-(?!\*)(\w+)\b/i,t=_self.Prism={util:{encode:function(e){return e instanceof n?new n(e.type,t.util.encode(e.content),e.alias):"Array"===t.util.type(e)?e.map(t.util.encode):e.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/\u00a0/g," ")},type:function(e){return Object.prototype.toString.call(e).match(/\[object (\w+)\]/)[1]},clone:function(e){var n=t.util.type(e);switch(n){case"Object":var a={};for(var r in e)e.hasOwnProperty(r)&&(a[r]=t.util.clone(e[r]));return a;case"Array":return e.map&&e.map(function(e){return t.util.clone(e)})}return e}},languages:{extend:function(e,n){var a=t.util.clone(t.languages[e]);for(var r in n)a[r]=n[r];return a},insertBefore:function(e,n,a,r){r=r||t.languages;var i=r[e];if(2==arguments.length){a=arguments[1];for(var l in a)a.hasOwnProperty(l)&&(i[l]=a[l]);return i}var o={};for(var s in i)if(i.hasOwnProperty(s)){if(s==n)for(var l in a)a.hasOwnProperty(l)&&(o[l]=a[l]);o[s]=i[s]}return t.languages.DFS(t.languages,function(t,n){n===r[e]&&t!=e&&(this[t]=o)}),r[e]=o},DFS:function(e,n,a){for(var r in e)e.hasOwnProperty(r)&&(n.call(e,r,e[r],a||r),"Object"===t.util.type(e[r])?t.languages.DFS(e[r],n):"Array"===t.util.type(e[r])&&t.languages.DFS(e[r],n,r))}},highlightAll:function(e,n){for(var a,r=document.querySelectorAll('code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'),i=0;a=r[i++];)t.highlightElement(a,e===!0,n)},highlightElement:function(a,r,i){for(var l,o,s=a;s&&!e.test(s.className);)s=s.parentNode;s&&(l=(s.className.match(e)||[,""])[1],o=t.languages[l]),a.className=a.className.replace(e,"").replace(/\s+/g," ")+" language-"+l,s=a.parentNode,/pre/i.test(s.nodeName)&&(s.className=s.className.replace(e,"").replace(/\s+/g," ")+" language-"+l);var u=a.textContent,g={element:a,language:l,grammar:o,code:u};if(!u||!o)return t.hooks.run("complete",g),void 0;if(t.hooks.run("before-highlight",g),r&&_self.Worker){var c=new Worker(t.filename);c.onmessage=function(e){g.highlightedCode=n.stringify(JSON.parse(e.data),l),t.hooks.run("before-insert",g),g.element.innerHTML=g.highlightedCode,i&&i.call(g.element),t.hooks.run("after-highlight",g),t.hooks.run("complete",g)},c.postMessage(JSON.stringify({language:g.language,code:g.code}))}else g.highlightedCode=t.highlight(g.code,g.grammar,g.language),t.hooks.run("before-insert",g),g.element.innerHTML=g.highlightedCode,i&&i.call(a),t.hooks.run("after-highlight",g),t.hooks.run("complete",g)},highlight:function(e,a,r){var i=t.tokenize(e,a);return n.stringify(t.util.encode(i),r)},tokenize:function(e,n){var a=t.Token,r=[e],i=n.rest;if(i){for(var l in i)n[l]=i[l];delete n.rest}e:for(var l in n)if(n.hasOwnProperty(l)&&n[l]){var o=n[l];o="Array"===t.util.type(o)?o:[o];for(var s=0;s<o.length;++s){var u=o[s],g=u.inside,c=!!u.lookbehind,f=0,h=u.alias;u=u.pattern||u;for(var p=0;p<r.length;p++){var d=r[p];if(r.length>e.length)break e;if(!(d instanceof a)){u.lastIndex=0;var m=u.exec(d);if(m){c&&(f=m[1].length);var y=m.index-1+f,m=m[0].slice(f),v=m.length,k=y+v,b=d.slice(0,y+1),w=d.slice(k+1),N=[p,1];b&&N.push(b);var O=new a(l,g?t.tokenize(m,g):m,h);N.push(O),w&&N.push(w),Array.prototype.splice.apply(r,N)}}}}}return r},hooks:{all:{},add:function(e,n){var a=t.hooks.all;a[e]=a[e]||[],a[e].push(n)},run:function(e,n){var a=t.hooks.all[e];if(a&&a.length)for(var r,i=0;r=a[i++];)r(n)}}},n=t.Token=function(e,t,n){this.type=e,this.content=t,this.alias=n};if(n.stringify=function(e,a,r){if("string"==typeof e)return e;if("Array"===t.util.type(e))return e.map(function(t){return n.stringify(t,a,e)}).join("");var i={type:e.type,content:n.stringify(e.content,a,r),tag:"span",classes:["token",e.type],attributes:{},language:a,parent:r};if("comment"==i.type&&(i.attributes.spellcheck="true"),e.alias){var l="Array"===t.util.type(e.alias)?e.alias:[e.alias];Array.prototype.push.apply(i.classes,l)}t.hooks.run("wrap",i);var o="";for(var s in i.attributes)o+=s+'="'+(i.attributes[s]||"")+'"';return"<"+i.tag+' class="'+i.classes.join(" ")+'" '+o+">"+i.content+"</"+i.tag+">"},!_self.document)return _self.addEventListener?(_self.addEventListener("message",function(e){var n=JSON.parse(e.data),a=n.language,r=n.code;_self.postMessage(JSON.stringify(t.util.encode(t.tokenize(r,t.languages[a])))),_self.close()},!1),_self.Prism):_self.Prism;var a=document.getElementsByTagName("script");return a=a[a.length-1],a&&(t.filename=a.src,document.addEventListener&&!a.hasAttribute("data-manual")&&document.addEventListener("DOMContentLoaded",t.highlightAll)),_self.Prism}();"undefined"!=typeof module&&module.exports&&(module.exports=Prism);
\ No newline at end of file
diff --git a/plugins/remove-initial-line-feed/index.html b/plugins/remove-initial-line-feed/index.html
new file mode 100644
index 0000000000..2af0b6697a
--- /dev/null
+++ b/plugins/remove-initial-line-feed/index.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+
+	<meta charset="utf-8" />
+	<link rel="shortcut icon" href="favicon.png" />
+	<title>Remove initial line feed ▲ Prism plugins</title>
+	<base href="../.." />
+	<link rel="stylesheet" href="style.css" />
+	<link rel="stylesheet" href="themes/prism.css" data-noprefix />
+	<script src="prefixfree.min.js"></script>
+
+	<script>var _gaq = [['_setAccount', 'UA-33746269-1'], ['_trackPageview']];</script>
+	<script src="http://www.google-analytics.com/ga.js" async></script>
+</head>
+<body>
+
+<header>
+	<div class="intro" data-src="templates/header-plugins.html" data-type="text/html"></div>
+
+	<h2>Remove initial line feed</h2>
+	<p>Removes the initial line feed in code blocks.</p>
+</header>
+
+<section class="language-markup">
+	<h1>How to use</h1>
+
+	<p>Obviously, this is supposed to work only for code blocks (<code>&lt;pre>&lt;code></code>) and not for inline code.</p>
+	<p>Add class <strong>remove-initial-line-feed</strong> to your desired <code>&lt;pre></code>.</p>
+</section>
+
+<section>
+	<h1>Examples</h1>
+
+	<h2>Without adding the class</h2>
+	<pre class="language-markup"><code>
+&lt;div>&lt;/div>
+</code></pre>
+
+	<h2>With the class added</h2>
+	<pre class="language-markup remove-initial-line-feed"><code>
+&lt;div>&lt;/div>
+</code></pre>
+
+</section>
+
+<footer data-src="templates/footer.html" data-type="text/html"></footer>
+
+<script src="prism.js"></script>
+<script src="plugins/remove-initial-line-feed/prism-remove-initial-line-feed.js"></script>
+<script src="utopia.js"></script>
+<script src="components.js"></script>
+<script src="code.js"></script>
+
+
+</body>
+</html>
\ No newline at end of file
diff --git a/plugins/remove-initial-line-feed/prism-remove-initial-line-feed.js b/plugins/remove-initial-line-feed/prism-remove-initial-line-feed.js
new file mode 100644
index 0000000000..c4d3d0ecae
--- /dev/null
+++ b/plugins/remove-initial-line-feed/prism-remove-initial-line-feed.js
@@ -0,0 +1,13 @@
+Prism.hooks.add('before-highlight', function(env) {
+	if (env.code) {
+		var pre = env.element.parentNode;
+		var clsReg = /\s*\bremove-initial-line-feed\b\s*/;
+		if (
+			pre && pre.nodeName.toLowerCase() === 'pre' &&
+			// Apply only if the <pre> or the <code> have the class
+			(clsReg.test(pre.className) || clsReg.test(env.element.className))
+		) {
+			env.code = env.code.replace(/^(?:\r?\n|\r)/, '');
+		}
+	}
+});
\ No newline at end of file
diff --git a/plugins/remove-initial-line-feed/prism-remove-initial-line-feed.min.js b/plugins/remove-initial-line-feed/prism-remove-initial-line-feed.min.js
new file mode 100644
index 0000000000..083381afdc
--- /dev/null
+++ b/plugins/remove-initial-line-feed/prism-remove-initial-line-feed.min.js
@@ -0,0 +1 @@
+Prism.hooks.add("before-highlight",function(e){if(e.code){var o=e.element.parentNode,a=/\s*\bremove-initial-line-feed\b\s*/;o&&"pre"===o.nodeName.toLowerCase()&&(a.test(o.className)||a.test(e.element.className))&&(e.code=e.code.replace(/^(?:\r?\n|\r)/,""))}});
\ No newline at end of file
diff --git a/prism.js b/prism.js
index 61bbaf307e..fd979fbf77 100644
--- a/prism.js
+++ b/prism.js
@@ -186,10 +186,6 @@ var _ = _self.Prism = {
 			code: code
 		};
 
-		if(code) {
-			env.code = code.replace(/^(?:\r?\n|\r)/, '');
-		}
-
 		if (!code || !grammar) {
 			_.hooks.run('complete', env);
 			return;