Github Comment Enhancer

Enhances Github comments

À data de 01/06/2014. Ver a versão mais recente.

Terá de instalar uma extensão como Tampermonkey, Greasemonkey ou Violentmonkey para instalar este script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

Terá de instalar uma extensão como Tampermonkey ou Violentmonkey para instalar este script.

Terá de instalar uma extensão como Tampermonkey ou Userscripts para instalar este script.

Terá de instalar uma extensão como Tampermonkey para instalar este script.

Terá de instalar uma extensão de gestão de scripts de utilizador para instalar este script.

(Já tenho um gestor de scripts de utilizador, deixe-me instalá-lo!)

Terá de instalar uma extensão como Stylus para instalar este estilo.

Terá de instalar uma extensão como Stylus para instalar este estilo.

Terá de instalar uma extensão como Stylus para instalar este estilo.

Terá de instalar uma extensão de gestão de estilos de utilizador para instalar este estilo.

Terá de instalar uma extensão de gestão de estilos de utilizador para instalar este estilo.

Terá de instalar uma extensão de gestão de estilos de utilizador para instalar este estilo.

(Já tenho um gestor de estilos de utilizador, deixe-me instalá-lo!)

// ==UserScript==
// @id          Github_Comment_Enhancer@https://github.com/jerone/UserScripts
// @name        Github Comment Enhancer
// @namespace   https://github.com/jerone/UserScripts
// @description Enhances Github comments
// @author      jerone
// @copyright   2014+, jerone (http://jeroenvanwarmerdam.nl)
// @license     GNU GPLv3
// @homepage    https://github.com/jerone/UserScripts/tree/master/Github_Comment_Enhancer
// @homepageURL https://github.com/jerone/UserScripts/tree/master/Github_Comment_Enhancer
// @version     1.5
// @grant       none
// @run-at      document-end
// @include     https://github.com/*/*/issues/*
// @include     https://github.com/*/*/pull/*
// @include     https://github.com/*/*/commit/*
// @include     https://github.com/*/*/wiki/*
// @include     https://gist.github.com/*
// ==/UserScript==
/* global unsafeWindow */

(function() {

	String.format = function(string) {
		var args = Array.prototype.slice.call(arguments, 1, arguments.length);
		return string.replace(/{(\d+)}/g, function(match, number) {
			return typeof args[number] !== "undefined" ? args[number] : match;
		});
	};

	// Source: https://github.com/gollum/gollum/blob/9c714e768748db4560bc017cacef4afa0c751a63/lib/gollum/public/gollum/javascript/editor/langs/markdown.js
	var MarkDown = {
		"function-bold": {
			search: /^(\s*)([\s\S]*?)(\s*)$/g,
			replace: "$1**$2**$3"
		},
		"function-italic": {
			search: /^(\s*)([\s\S]*?)(\s*)$/g,
			replace: "$1_$2_$3"
		},
		"function-strikethrough": {
			search: /^(\s*)([\s\S]*?)(\s*)$/g,
			replace: "$1~~$2~~$3"
		},

		"function-h1": {
			search: /(.+)([\n]?)/g,
			replace: "# $1$2",
			forceNewline: true
		},
		"function-h2": {
			search: /(.+)([\n]?)/g,
			replace: "## $1$2",
			forceNewline: true
		},
		"function-h3": {
			search: /(.+)([\n]?)/g,
			replace: "### $1$2",
			forceNewline: true
		},
		"function-h4": {
			search: /(.+)([\n]?)/g,
			replace: "#### $1$2",
			forceNewline: true
		},
		"function-h5": {
			search: /(.+)([\n]?)/g,
			replace: "##### $1$2",
			forceNewline: true
		},
		"function-h6": {
			search: /(.+)([\n]?)/g,
			replace: "###### $1$2",
			forceNewline: true
		},

		"function-link": {
			exec: function(txt, selText, commentForm, next) {
				var selTxt = selText.trim(),
					isUrl = selTxt && /(?:https?:\/\/)|(?:www\.)/.test(selTxt),
					href = window.prompt("Link href:", isUrl ? selTxt : ""),
					text = window.prompt("Link text:", isUrl ? "" : selTxt);
				if (href) {
					next(String.format("[{0}]({1}){2}", text || href, href, (/\s+$/.test(selText) ? " " : "")));
				}
			}
		},
		"function-image": {
			exec: function(txt, selText, commentForm, next) {
				var selTxt = selText.trim(),
					isUrl = selTxt && /(?:https?:\/\/)|(?:www\.)/.test(selTxt),
					href = window.prompt("Image href:", isUrl ? selTxt : ""),
					text = window.prompt("Image text:", isUrl ? "" : selTxt);
				if (href) {
					next(String.format("![{0}]({1}){2}", text || href, href, (/\s+$/.test(selText) ? " " : "")));
				}
			}
		},

		"function-ul": {
			search: /(.+)([\n]?)/g,
			replace: "* $1$2",
			forceNewline: true
		},
		"function-ol": {
			exec: function(txt, selText, commentForm, next) {
				var repText = "";
				if (!selText) {
					repText = "1. ";
				} else {
					var lines = selText.split("\n"),
						hasContent = /[\w]+/;
					for (var i = 0; i < lines.length; i++) {
						if (hasContent.test(lines[i])) {
							repText += String.format("$0. $1\n", i + 1, lines[i]);
						}
					}
				}
				next(repText);
			}
		},
		"function-checklist": {
			search: /(.+)([\n]?)/g,
			replace: "* [ ] $1$2",
			forceNewline: true
		},

		"function-code": {
			exec: function(txt, selText, commentForm, next) {
				var rt = selText.indexOf("\n") > -1 ? "$1\n```\n$2\n```$3" : "$1`$2`$3";
				next(selText.replace(/^(\s*)([\s\S]*?)(\s*)$/g, rt));
			}
		},
		"function-blockquote": {
			search: /(.+)([\n]?)/g,
			replace: "> $1$2",
			forceNewline: true
		},
		"function-hr": {
			append: "\n***\n",
			forceNewline: true
		},
		"function-table": {
			append: "\n" +
					"| Head | Head | Head |\n" +
					"| :--- | :--: | ---: |\n" +
					"| Cell | Cell | Cell |\n" +
					"| Cell | Cell | Cell |\n",
			forceNewline: true
		},

		"function-clear": {
			exec: function(txt, selText, commentForm, next) {
				commentForm.value = "";
				next("");
			}
		},

		"function-snippets-useragent": {
			exec: function(txt, selText, commentForm, next) {
				next("`" + navigator.userAgent + "`");
			}
		},
		"function-snippets-contributing": {
			exec: function(txt, selText, commentForm, next) {
				next("Please, always consider reviewing the [guidelines for contributing](../blob/master/CONTRIBUTING.md) to this repository.");
			}
		}
	};

	var editorHTML = (function() {
		return '<div id="gollum-editor-function-buttons" style="float: left;">' +
				'	<div class="button-group">' +
				'		<a href="#" id="function-bold" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Bold">' +
				'			<b style="font-weight: bolder;">B</b>' +
				'		</a>' +
				'		<a href="#" id="function-italic" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Italic">' +
				'			<em>i</em>' +
				'		</a>' +
				'		<a href="#" id="function-strikethrough" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Strikethrough">' +
				'			<s>S</s>' +
				'		</a>' +
				'	</div>' +

				'	<div class="button-group">' +
				'		<div class="select-menu js-menu-container js-select-menu">' +
				'			<span class="minibutton select-menu-button icon-only js-menu-target tooltipped tooltipped-ne" aria-label="Headers" style="padding:0 20px 0 7px; width:auto; border-bottom-right-radius:3px; border-top-right-radius:3px;">' +
				'		<span class="js-select-button">h#</span>' +
				'			</span>' +
				'			<div class="select-menu-modal-holder js-menu-content js-navigation-container js-active-navigation-container" style="top: 26px;">' +
				'				<div class="select-menu-modal" style="width:auto; overflow:visible;">' +
				'					<div class="select-menu-header">' +
				'						<span class="select-menu-title">Choose header</span>' +
				'						<span class="octicon octicon-remove-close js-menu-close"></span>' +
				'					</div>' +
				'					<div class="button-group">' +
				'						<a href="#" id="function-h1" class="minibutton function-button js-navigation-item js-menu-close tooltipped tooltipped-s" aria-label="Header 1">' +
				'							<b class="select-menu-item-text js-select-button-text">h1</b>' +
				'						</a>' +
				'						<a href="#" id="function-h2" class="minibutton function-button js-navigation-item js-menu-close tooltipped tooltipped-s" aria-label="Header 2">' +
				'							<b class="select-menu-item-text js-select-button-text">h2</b>' +
				'						</a>' +
				'						<a href="#" id="function-h3" class="minibutton function-button js-navigation-item js-menu-close tooltipped tooltipped-s" aria-label="Header 3">' +
				'							<b class="select-menu-item-text js-select-button-text">h3</b>' +
				'						</a>' +
				'						<a href="#" id="function-h4" class="minibutton function-button js-navigation-item js-menu-close tooltipped tooltipped-s" aria-label="Header 4">' +
				'							<b class="select-menu-item-text js-select-button-text">h4</b>' +
				'						</a>' +
				'						<a href="#" id="function-h5" class="minibutton function-button js-navigation-item js-menu-close tooltipped tooltipped-s" aria-label="Header 5">' +
				'							<b class="select-menu-item-text js-select-button-text">h5</b>' +
				'						</a>' +
				'						<a href="#" id="function-h6" class="minibutton function-button js-navigation-item js-menu-close tooltipped tooltipped-s" aria-label="Header 6">' +
				'							<b class="select-menu-item-text js-select-button-text">h6</b>' +
				'						</a>' +
				'					</div>' +
				'				</div>' +
				'			</div>' +
				'		</div>' +
				'	</div>' +

				'	<div class="button-group">' +
				'		<a href="#" id="function-link" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Link">' +
				'			<span class="octicon octicon-link"></span>' +
				'		</a>' +
				'		<a href="#" id="function-image" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Image">' +
				'			<span class="octicon octicon-file-media"></span>' +
				'		</a>' +
				'	</div>' +
				'	<div class="button-group">' +
				'		<a href="#" id="function-ul" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Unordered List">' +
				'			<span class="octicon octicon-list-unordered"></span>' +
				'		</a>' +
				'		<a href="#" id="function-ol" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Ordered List">' +
				'			<span class="octicon octicon-list-ordered"></span>' +
				'		</a>' +
				'		<a href="#" id="function-checklist" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Task List">' +
				'			<span class="octicon octicon-checklist"></span>' +
				'		</a>' +
				'	</div>' +

				'	<div class="button-group">' +
				'		<a href="#" id="function-code" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Code">' +
				'			<span class="octicon octicon-code"></span>' +
				'		</a>' +
				'		<a href="#" id="function-blockquote" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Blockquote">' +
				'			<span class="octicon octicon-quote"></span>' +
				'		</a>' +
				'		<a href="#" id="function-hr" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Horizontal Rule">' +
				'			<span class="octicon octicon-horizontal-rule"></span>' +
				'		</a>' +
				'		<a href="#" id="function-table" class="minibutton function-button tooltipped tooltipped-ne" aria-label="Table">' +
				'			<span class="octicon octicon-three-bars"></span>' +
				'		</a>' +
				'	</div>' +

				'	<div class="button-group">' +
				'		<div class="select-menu js-menu-container js-select-menu">' +
				'			<span class="minibutton select-menu-button js-menu-target tooltipped tooltipped-ne" aria-label="Snippets" style="padding:0 20px 0 7px; width:auto; border-bottom-right-radius:3px; border-top-right-radius:3px;">' +
				'				<span class="octicon octicon-pin"></span>' +
				'			</span>' +
				'			<div class="select-menu-modal-holder js-menu-content js-navigation-container js-active-navigation-container">' +
				'				<div class="select-menu-modal" style="overflow:visible;">' +
				'					<div class="select-menu-header">' +
				'						<span class="select-menu-title">Snippets</span>' +
				'						<span class="octicon octicon-remove-close js-menu-close"></span>' +
				'					</div>' +
				'					<div class="select-menu-filters">' +
				'						<div class="select-menu-text-filter">' +
				'							<input type="text" placeholder="Filter snippets..." class="js-filterable-field js-navigation-enable" id="context-snippets-filter-field">' +
				'						</div>' +
				'					</div>' +
				'					<div class="select-menu-list" style="overflow:visible;">' +
				'						<div data-filterable-for="context-snippets-filter-field">' +
				'							<a href="#" id="function-snippets-useragent" class="function-button select-menu-item js-navigation-item tooltipped tooltipped-w" aria-label="Add UserAgent" style="table-layout:initial;">' +
				'								<span class="select-menu-item-text js-select-button-text">Add UserAgent</span>' +
				'							</a>' +
				'							<a href="#" id="function-snippets-contributing" class="function-button select-menu-item js-navigation-item tooltipped tooltipped-w" aria-label="Add contributing message" style="table-layout:initial;">' +
				'								<span class="select-menu-item-text">' +
				'									<span class="js-select-button-text">Contributing</span>' +
				'									<span class="description">Add contributing message</span>' +
				'								</span>' +
				'							</a>' +
				'						</div>' +
				'						<div class="select-menu-no-results">Nothing to show</div>' +
				'					</div>' +
				'				</div>' +
				'			</div>' +
				'		</div>' +
				'	</div>' +

				'</div>' +

				'<div class="button-group" style="float:right;">' +
				'	<a href="#" id="function-clear" class="minibutton function-button tooltipped tooltipped-nw" aria-label="Clear">' +
				'		<span class="octicon octicon-circle-slash"></span>' +
				'	</a>' +
				'</div>';
	})();

	// Source: https://github.com/gollum/gollum/blob/9c714e768748db4560bc017cacef4afa0c751a63/lib/gollum/public/gollum/javascript/editor/gollum.editor.js#L516
	function executeAction(definitionObject, commentForm) {
		var txt = commentForm.value,
			selPos = {
				start: commentForm.selectionStart,
				end: commentForm.selectionEnd
			},
			selText = txt.substring(selPos.start, selPos.end),
			repText = selText,
			reselect = true,
			cursor = null;

		// execute replacement function;
		if (definitionObject.exec) {
			definitionObject.exec(txt, selText, commentForm, function(repText) {
				replaceFieldSelection(commentForm, repText);
			});
			return;
		}

		// execute a search;
		var searchExp = new RegExp(definitionObject.search || /([^\n]+)/gi);

		// replace text;
		if (definitionObject.replace) {
			var rt = definitionObject.replace;
			repText = repText.replace(searchExp, rt);
			repText = repText.replace(/\$[\d]/g, "");
			if (repText === "") {
				cursor = rt.indexOf("$1");
				repText = rt.replace(/\$[\d]/g, "");
				if (cursor === -1) {
					cursor = Math.floor(rt.length / 2);
				}
			}
		}

		// append if necessary;
		if (definitionObject.append) {
			if (repText === selText) {
				reselect = false;
			}
			repText += definitionObject.append;
		}

		if (repText) {
			if (definitionObject.forceNewline === true && (selPos.start > 0 && txt.substr(Math.max(0, selPos.start - 1), 1) !== "\n")) {
				repText = "\n" + repText;
			}
			replaceFieldSelection(commentForm, repText, reselect, cursor);
		}
	}

	// Source: https://github.com/gollum/gollum/blob/9c714e768748db4560bc017cacef4afa0c751a63/lib/gollum/public/gollum/javascript/editor/gollum.editor.js#L708
	function replaceFieldSelection(commentForm, replaceText, reselect, cursorOffset) {
		var txt = commentForm.value,
			selPos = {
				start: commentForm.selectionStart,
				end: commentForm.selectionEnd
			};

		var selectNew = true;
		if (reselect === false) {
			selectNew = false;
		}

		var scrollTop = null;
		if (commentForm.scrollTop) {
			scrollTop = commentForm.scrollTop;
		}

		commentForm.value = txt.substring(0, selPos.start) + replaceText + txt.substring(selPos.end);
		commentForm.focus();

		// Gist Github requires that the comment form change event be triggered to update the preview;
		unsafeWindow.$(commentForm).trigger("change");

		if (selectNew) {
			if (cursorOffset) {
				commentForm.setSelectionRange(selPos.start + cursorOffset, selPos.start + cursorOffset);
			} else {
				commentForm.setSelectionRange(selPos.start, selPos.start + replaceText.length);
			}
		}

		if (scrollTop) {
			commentForm.scrollTop = scrollTop;
		}
	}

	function isWiki() {
		return /\/wiki\//.test(location.href);
	}

	var functionButtonClick = function(e) {
		e.preventDefault();
		executeAction(MarkDown[this.id], this.commentForm);
		return false;
	};

	function addToolbar() {
		if (isWiki()) {
			// Override existing language with improved & missing functions and remove existing click events;
			unsafeWindow.$.GollumEditor.defineLanguage("markdown", MarkDown);
			unsafeWindow.$(".function-button:not(#function-help)").unbind("click");

			// Remove existing click events when changing languages;
			document.getElementById("wiki_format").addEventListener("change", function() {
				unsafeWindow.$(".function-button:not(#function-help)").unbind("click");

				Array.forEach(document.querySelectorAll(".comment-form-textarea .function-button"), function(button) {
					button.removeEventListener("click", functionButtonClick);
				});
			});
		}

		Array.forEach(document.querySelectorAll(".comment-form-textarea,.js-comment-field"), function(commentForm) {
			if (commentForm.classList.contains("GithubCommentEnhancer")) { return; }
			commentForm.classList.add("GithubCommentEnhancer");

			var gollumEditor;
			if (isWiki()) {
				gollumEditor = document.getElementById("gollum-editor-function-bar");
				var temp = document.createElement("div");
				temp.innerHTML = editorHTML;
				temp.firstChild.appendChild(document.getElementById("function-help"));  // restore the help button;
				gollumEditor.replaceChild(temp.querySelector("#gollum-editor-function-buttons"), document.getElementById("gollum-editor-function-buttons"));
				Array.forEach(temp.children, function(elm) {
					elm.style.position = "absolute";
					elm.style.right = "30px";
					elm.style.top = "0";
					commentForm.parentNode.insertBefore(elm, commentForm);
				});
				temp = null;
			} else {
				gollumEditor = document.createElement("div");
				gollumEditor.innerHTML = editorHTML;
				gollumEditor.id = "gollum-editor-function-bar";
				gollumEditor.style.border = "0 none";
				gollumEditor.style.height = "26px";
				gollumEditor.style.margin = "10px 0";
				gollumEditor.style.paddingBottom = "10px";
				gollumEditor.classList.add("active");
				commentForm.parentNode.insertBefore(gollumEditor, commentForm);
			}

			Array.forEach(gollumEditor.parentNode.querySelectorAll(".function-button"), function(button) {
				if (button.classList.contains("minibutton")) {
					button.style.padding = "0px";
					button.style.textAlign = "center";
					button.style.width = "30px";
					button.firstElementChild.style.marginRight = "0px";
				}
				button.commentForm = commentForm;  // remove event listener doesn't accept `bind`;
				button.addEventListener("click", functionButtonClick);
			});
		});
	}

	// init;
	addToolbar();

	// on pjax;
	unsafeWindow.$(document).on("pjax:success", addToolbar);

	// on page update;
	unsafeWindow.$.pageUpdate(function() {
		window.setTimeout(function() {
			addToolbar();
		}, 1);
	});

})();