From 2f217dfe37a0708a663c224241a60e85c06b9fe8 Mon Sep 17 00:00:00 2001
From: Sindre Sorhus <sindresorhus@gmail.com>
Date: Tue, 16 Feb 2016 02:34:52 +0700
Subject: [PATCH] linkify branch references in pull requests - fixes #1

---
 extension/content.css            |  6 +++
 extension/content.js             | 72 ++++++++++++++++++---------
 extension/manifest.json          |  2 +
 extension/vendor/gh-injection.js | 84 ++++++++++++++++++++++++++++++++
 extension/vendor/sprint.min.js   | 35 +++++++++++++
 readme.md                        |  1 +
 6 files changed, 176 insertions(+), 24 deletions(-)
 create mode 100644 extension/vendor/gh-injection.js
 create mode 100644 extension/vendor/sprint.min.js

diff --git a/extension/content.css b/extension/content.css
index 70ac173..c22297b 100755
--- a/extension/content.css
+++ b/extension/content.css
@@ -105,3 +105,9 @@
 .file-navigation a[href$="/pull/new/master"] {
 	display: none !important;
 }
+
+/* add hover underline for `content.js` linkified branch refs in pull requests */
+.commit-ref:hover,
+.commit-ref:hover span {
+	text-decoration: underline !important;
+}
diff --git a/extension/content.js b/extension/content.js
index 21be25a..7fe471f 100755
--- a/extension/content.js
+++ b/extension/content.js
@@ -1,35 +1,59 @@
-document.addEventListener('DOMContentLoaded', () => {
-	'use strict';
+'use strict';
+const path = location.pathname;
+const isDashboard = path === '/';
+const isRepo = /^\/.*\/.*\//.test(location.pathname)
+const isPR = () => /^\/.*\/.*\/pull\/\d+$/.test(location.pathname);
+const repoName = path.split('/')[2];
+
+function linkifyBranchRefs() {
+	$('.commit-ref').each((i, el) => {
+		const parts = $(el).find('.css-truncate-target');
+		const username = parts.eq(0).text();
+		const branch = parts.eq(1).text();
+		$(el).wrap(`<a href="https://github.com/${username}/${repoName}/tree/${branch}">`);
+	});
+}
 
+document.addEventListener('DOMContentLoaded', () => {
 	const username = document.querySelector('meta[name="user-login"]').getAttribute('content');
 
-	// hide other users starring/forking your repos
-	{
-		const hideStarsOwnRepos = () => {
-			const items = Array.from(document.querySelectorAll('#dashboard .news .watch_started, #dashboard .news .fork'));
+	if (isDashboard) {
+		// hide other users starring/forking your repos
+		{
+			const hideStarsOwnRepos = () => {
+				const items = Array.from(document.querySelectorAll('#dashboard .news .watch_started, #dashboard .news .fork'));
 
-			for (const item of items) {
-				if (item.querySelector('.title a[href^="/' + username + '"')) {
-					item.style.display = 'none';
+				for (const item of items) {
+					if (item.querySelector('.title a[href^="/' + username + '"')) {
+						item.style.display = 'none';
+					}
 				}
-			}
-		};
+			};
 
-		hideStarsOwnRepos();
+			hideStarsOwnRepos();
 
-		new MutationObserver(() => hideStarsOwnRepos())
-			.observe(document.querySelector('#dashboard .news'), {childList: true});
-	}
+			new MutationObserver(() => hideStarsOwnRepos())
+				.observe(document.querySelector('#dashboard .news'), {childList: true});
+		}
 
-	// expand all the news feed pages
-	(function more() {
-		const btn = document.querySelector('.ajax-pagination-btn');
+		// expand all the news feed pages
+		(function more() {
+			const btn = document.querySelector('.ajax-pagination-btn');
 
-		if (!btn) {
-			return;
-		}
+			if (!btn) {
+				return;
+			}
+
+			btn.click();
+			setTimeout(more, 200);
+		})();
+	}
 
-		btn.click();
-		setTimeout(more, 200);
-	})();
+	if (isRepo) {
+		gitHubInjection(window, () => {
+			if (isPR()) {
+				linkifyBranchRefs();
+			}
+		});
+	}
 });
diff --git a/extension/manifest.json b/extension/manifest.json
index 4efd3b3..a1a49a3 100755
--- a/extension/manifest.json
+++ b/extension/manifest.json
@@ -22,6 +22,8 @@
 				"custom.css"
 			],
 			"js": [
+				"vendor/sprint.min.js",
+				"vendor/gh-injection.js",
 				"content.js"
 			]
 		}
diff --git a/extension/vendor/gh-injection.js b/extension/vendor/gh-injection.js
new file mode 100644
index 0000000..41151d8
--- /dev/null
+++ b/extension/vendor/gh-injection.js
@@ -0,0 +1,84 @@
+'use strict';
+// https://github.com/octo-linker/injection
+
+// Grabbed from underscore.js
+// http://underscorejs.org/#debounce
+function debounce(func, wait, immediate) {
+  var timeout;
+  return function() {
+    var context = this, args = arguments;
+    var later = function() {
+      timeout = null;
+      if (!immediate) {
+        func.apply(context, args);
+      }
+    };
+    var callNow = immediate && !timeout;
+    clearTimeout(timeout);
+    timeout = setTimeout(later, wait);
+    if (callNow) {
+      func.apply(context, args);
+    }
+  };
+}
+
+var gitHubInjection = function (global, options, cb) {
+  if (!global) {
+    throw new Error('Missing argument global');
+  }
+  if (!global.document || !global.document.getElementById) {
+    throw new Error('The given argument global is not a valid window object');
+  }
+
+  if (!cb) {
+    cb = options;
+    options = {};
+  } else if (typeof cb !== 'function') {
+    throw new Error('Callback is not a function');
+  }
+
+  if (!cb) {
+    throw new Error('Missing argument callback');
+  }
+
+  options = options || {};
+  options.context = options.context || null;
+  options.wait = options.wait || 250;
+
+  cb = debounce(cb, options.wait).bind(options.context);
+
+  var domElement = global.document.getElementById('js-repo-pjax-container');
+  if (!domElement || !global.MutationObserver) {
+    return cb(null);
+  }
+
+  var viewSpy = new global.MutationObserver(function (mutations) {
+    mutations.forEach(function (mutation) {
+      if (mutation.type === 'childList' && mutation.addedNodes.length) {
+        cb(null);
+      }
+    });
+  });
+
+  viewSpy.observe(domElement, {
+    attributes: true,
+    childList: true,
+    characterData: true
+  });
+
+  cb(null);
+};
+
+// Export the gitHubInjection function for **Node.js**, with
+// backwards-compatibility for the old `require()` API. If we're in
+// the browser, add `gitHubInjection` as a global object.
+if (typeof exports !== 'undefined') {
+  if (typeof module !== 'undefined' && module.exports) {
+    exports = module.exports = gitHubInjection;
+  }
+  exports.gitHubInjection = gitHubInjection;
+} else {
+  /*jshint -W040 */
+  this.gitHubInjection = gitHubInjection;
+  /*jshint +W040 */
+}
diff --git a/extension/vendor/sprint.min.js b/extension/vendor/sprint.min.js
new file mode 100644
index 0000000..d591e56
--- /dev/null
+++ b/extension/vendor/sprint.min.js
@@ -0,0 +1,35 @@
+// Sprint v0.9.2 - sprintjs.com/license
+var Sprint;
+(function(){var D=function(a,b){for(var c=Sprint(b),d=Object.keys(a),e=d.length,f=0;f<e;f++)for(var g=d[f],h=a[g],k=h.length,l=0;l<k;l++)c.on(g,h[l])},w=function(){var a="animation-iteration-count column-count flex-grow flex-shrink font-weight line-height opacity order orphans widows z-index".split(" ");return function(b,c){if(v(b,a))return c;var d="string"==typeof c?c:c.toString();c&&!/\D/.test(d)&&(d+="px");return d}}(),K={afterbegin:function(a){this.insertBefore(a,this.firstChild)},afterend:function(a){var b=
+this.parentElement;b&&b.insertBefore(a,this.nextSibling)},beforebegin:function(a){var b=this.parentElement;b&&b.insertBefore(a,this)},beforeend:function(a){this.appendChild(a)}},E=function(a,b){if(!(1<a.nodeType)){var c=a.sprintEventListeners;c&&D(c,b);for(var d=r("*",a),e=d.length,f,g=0;g<e;g++)if(c=d[g].sprintEventListeners)f||(f=r("*",b)),D(c,f[g])}},z=function(a,b,c,d,e){var f=[],g=this;this.each(function(){for(var h=a?this.parentElement:this;h&&(!e||e!=h);){if(!d||g.is(d,h))if(f.push(h),c)break;
+if(b)break;h=h.parentElement}});return Sprint(x(f))},F=function(a,b){return Object.keys(a.sprintEventListeners).filter(function(a){return q(b).every(function(b){return v(b,q(a))})})},G=function(a,b,c){if(null==c){var d=a.get(0);if(!d||1<d.nodeType)return;a=b[0].toUpperCase()+b.substring(1);return d==document?(d=m["offset"+a],a=window["inner"+a],d>a?d:a):d==window?window["inner"+a]:d.getBoundingClientRect()[b]}var e="function"==typeof c,f=e?"":w(b,c);return a.each(function(a){this==document||this==
+window||1<this.nodeType||(e&&(f=w(b,c.call(this,a,Sprint(this)[b]()))),this.style[b]=f)})},p=function(a,b){var c=b.length,d=b;if(1<c&&-1<a.indexOf("after"))for(var d=[],e=c;e--;)d.push(b[e]);for(e=0;e<c;e++){var f=d[e];if("string"==typeof f||"number"==typeof f)this.each(function(){this.insertAdjacentHTML(a,f)});else if("function"==typeof f)this.each(function(b){b=f.call(this,b,this.innerHTML);p.call(Sprint(this),a,[b])});else{var g=f instanceof n,h=[],k=g?f.get():Array.isArray(f)?A(f,!0,!0):f.nodeType?
+[f]:t(f),l=k.length;this.each(function(b){for(var c=document.createDocumentFragment(),d=0;d<l;d++){var e=k[d],f;b?(f=e.cloneNode(!0),E(e,f)):f=e;c.appendChild(f);h.push(f)}K[a].call(this,c)});g&&(f.dom=h,f.length=h.length);if(!(e<c-1))return h}}},v=function(a,b){for(var c=b.length;c--;)if(b[c]===a)return!0;return!1},B=function(a,b,c){if(null==b)return"add"==a?this:this.removeAttr("class");var d,e,f;"string"==typeof b&&(d=!0,e=b.trim().split(" "),f=e.length);return this.each(function(g,h){if(!(1<this.nodeType)){if(!d){var k=
+b.call(h,g,h.className);if(!k)return;e=k.trim().split(" ");f=e.length}for(k=0;k<f;k++){var l=e[k];l&&(null==c?h.classList[a](l):h.classList.toggle(l,c))}}})},L=function(){for(var a=["mozMatchesSelector","webkitMatchesSelector","msMatchesSelector","matches"],b=a.length;b--;){var c=a[b];if(Element.prototype[c])return c}}(),x=function(a){for(var b=[],c=0,d=a.length,e=0;e<d;e++){for(var f=a[e],g=!1,h=0;h<c;h++)if(f===b[h]){g=!0;break}g||(b[c++]=f)}return b},H=function(){var a=function(a,b,c){return 2>
+Object.keys(a.sprintEventListeners).filter(function(a){return q(b)[0]===q(a)[0]}).map(function(b){return a.sprintEventListeners[b]}).reduce(function(a,b){return a.concat(b)}).filter(function(a){return a===c}).length?!1:!0},b=function(b,c,f){return function(g){f&&f!==g||(b.removeEventListener(c,g),/\./.test(c)&&!a(b,c,g)&&b.removeEventListener(q(c)[0],g))}},c=function(a,b){return a.filter(function(a){return b&&b!==a})};return function(a,e){return function(f){a.sprintEventListeners[f].forEach(b(a,f,
+e));a.sprintEventListeners[f]=c(a.sprintEventListeners[f],e)}}}(),M=function(a,b){return function(c){F(a,c).forEach(H(a,b))}},m=document.documentElement,A=function(a,b,c){for(var d=a.length,e=d;e--;)if(!a[e]&&0!==a[e]||b&&a[e]instanceof n||c&&("string"==typeof a[e]||"number"==typeof a[e])){for(var e=[],f=0;f<d;f++){var g=a[f];if(g||0===g)if(b&&g instanceof n)for(var h=0;h<g.length;h++)e.push(g.get(h));else!c||"string"!=typeof g&&"number"!=typeof g?e.push(g):e.push(document.createTextNode(g))}return e}return a},
+I=function(){var a;return function(b,c,d){if(!a){var e=m.scrollTop;m.scrollTop=e+1;var f=m.scrollTop;m.scrollTop=e;a=f>e?m:document.body}if(null==d){b=b.get(0);if(!b)return;if(b==window||b==document)b=a;return b[c]}return b.each(function(){var b=this;if(b==window||b==document)b=a;b[c]=d})}}(),y=function(a,b,c,d){var e=[],f=b+"ElementSibling";a.each(function(){for(var b=this;(b=b[f])&&(!d||!a.is(d,b));)c&&!a.is(c,b)||e.push(b)});return Sprint(x(e))},J=function(a,b,c){var d=b+"ElementSibling";return a.map(function(){var b=
+this[d];if(b&&(!c||a.is(c,b)))return b},!1)},r=function(a,b){b=b||document;if(/^[\#.]?[\w-]+$/.test(a)){var c=a[0];return"."==c?t(b.getElementsByClassName(a.slice(1))):"#"==c?(c=b.getElementById(a.slice(1)))?[c]:[]:"body"==a?[document.body]:t(b.getElementsByTagName(a))}return t(b.querySelectorAll(a))},q=function(a){return A(a.split("."))},t=function(a){for(var b=[],c=a.length;c--;)b[c]=a[c];return b},C=function(){var a=function(a,c){var d=Sprint(a).clone(!0).get(0),e=d;if(d&&!(1<this.nodeType)){for(;e.firstChild;)e=
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+this.get();a=Sprint(a);for(var c=a.get(),d=0;d<a.length;d++)b.push(c[d]);return Sprint(x(b))},addClass:function(a){return B.call(this,"add",a)},after:function(){p.call(this,"afterend",arguments);return this},append:function(){p.call(this,"beforeend",arguments);return this},appendTo:function(a){return Sprint(p.call(Sprint(a),"beforeend",[this]))},attr:function(a,b){var c="function"==typeof b;if("string"==typeof b||"number"==typeof b||c)return this.each(function(d){1<this.nodeType||this.setAttribute(a,
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+a&&!c.is(a,g)||b.push(g)}});return Sprint(b)},clone:function(a){return this.map(function(){if(this){var b=this.cloneNode(!0);a&&E(this,b);return b}},!1)},closest:function(a,b){return z.call(this,!1,!1,!0,a,b)},css:function(a,b){var c=typeof b,d="string"==c;if(d||"number"==c){var e=d&&/=/.test(b);if(e)var f=parseInt(b[0]+b.slice(2));return this.each(function(){if(!(1<this.nodeType)){if(e)var c=parseInt(getComputedStyle(this).getPropertyValue(a))+f;this.style[a]=w(a,e?c:b)}})}if("function"==c)return this.each(function(c){if(!(1<
+this.nodeType)){var d=getComputedStyle(this).getPropertyValue(a);this.style[a]=b.call(this,c,d)}});if("string"==typeof a)return d=this.get(0),!d||1<d.nodeType?void 0:getComputedStyle(d).getPropertyValue(a);if(Array.isArray(a)){d=this.get(0);if(!d||1<d.nodeType)return;for(var c={},d=getComputedStyle(d),g=a.length,h=0;h<g;h++){var k=a[h];c[k]=d.getPropertyValue(k)}return c}var l=Object.keys(a),m=l.length;return this.each(function(){if(!(1<this.nodeType))for(var b=0;b<m;b++){var c=l[b];this.style[c]=
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+find:function(a){if("string"==typeof a){var b=[];this.each(function(){if(!(1<this.nodeType))for(var c=r(a,this),d=c.length,e=0;e<d;e++)b.push(c[e])});return Sprint(x(b))}for(var c=a.nodeType?[a]:a.get(),d=c.length,e=[],f=0,g=0;g<this.length;g++){var h=this.get(g);if(!(1<h.nodeType))for(var k=0;k<d;k++){var l=c[k];if(h.contains(l)&&(e[f++]=l,!(f<d)))return Sprint(e)}}return Sprint(e)},first:function(){return this.eq(0)},get:function(a){if(null==a)return this.dom;0>a&&(a+=this.length);return this.dom[a]},
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diff --git a/readme.md b/readme.md
index 0cc3f72..47e71e5 100755
--- a/readme.md
+++ b/readme.md
@@ -9,6 +9,7 @@ I use GitHub a lot and notice many dumb annoyances I want to fix. So here be dra
 
 - Hides other users starring/forking your repos from the newsfeed
 - Automagically expands all the news feed pages
+- [Linkifies branch references](https://github.com/sindresorhus/refined-github/issues/1) in pull requests
 - Removes tooltips
 - Removes annoying hover effect in the repo file browser
 - Removes the comment box toolbar