stackoverflow.comments.user.js

// ==UserScript==
// @name Stackoverflow.Comments.User
// @author Alexander Kachanov
// @include /^https?:\/\/(.*\.)?stackoverflow\.com/questions/.*$/
// @include /^https?:\/\/(.*\.)?stackoverflow\.com/review/.*$/
// @include /^https?:\/\/(.*\.)?serverfault\.com/questions/.*$/
// @include /^https?:\/\/(.*\.)?serverfault\.com/review/.*$/
// @include /^https?:\/\/(.*\.)?askubuntu\.com/questions/.*$/
// @include /^https?:\/\/(.*\.)?askubuntu\.com/review/.*$/
// @include /^https?:\/\/(.*\.)?mathoverflow\.com/questions/.*$/
// @include /^https?:\/\/(.*\.)?mathoverflow\.com/review/.*$/
// @include /^https?:\/\/(.*\.)?stackexchange\.com/questions/.*$/
// @include /^https?:\/\/(.*\.)?stackexchange\.com/review/.*$/
// @include /^https?:\/\/(.*\.)?superuser\.com/questions/.*$/
// @include /^https?:\/\/(.*\.)?superuser\.com/review/.*$/
// @include /^https?:\/\/(.*\.)?stackapps\.com/questions/.*$/
// @include /^https?:\/\/(.*\.)?stackapps\.com/review/.*$/
// ==/UserScript==
(function (window, undefined) {
	var get = function(selector, context) {
		var nodeList = (context || document).querySelectorAll(selector);
		var array = [];
		for (var i = 0; i < nodeList.length; i++) {
			array.push(nodeList.item(i));
		}
		return array;
	};

	var parent = function(element, selector) {
		if (!!selector) {
			var e = element.parentElement;
			while (!!e && !e.matches(selector)) {
				e = e.parentElement;
			}

			return e;
		} else {
			return element.parentElement;
		}
	};

	var updateCommentsColoring = function() {
		var profiles = {}

		var addProfile = function(e) {
			var userName = e.innerHTML.trim();
			profiles[userName] = '';
		}

		var myProfile = get('a.my-profile');
		if (typeof myProfile[0] !== 'undefined' && myProfile[0].tagName === 'A') {
			var me = myProfile[0].href.substr(myProfile[0].href.lastIndexOf('/') + 1);
			profiles[me] = '';
		}

		get('.comment-user').forEach(addProfile);

		var usersCount = Object.keys(profiles).length;
		var deltaAngle = 360 / usersCount,
			hue = -deltaAngle,
			saturation = 100,
			lightness = 75;

		Object.keys(profiles).forEach(function(user) {
			hue += deltaAngle;
			profiles[user] = 'hsl(' + hue + ', ' + saturation + '%, ' + lightness + '%)';
		});

		get('.comment-body').forEach(function(e) {
			var user = get('.comment-user', e)[0].innerHTML.trim(),
				comment = get('.comment-actions', parent(e, '.comment'))[0];

			e.style.margin = 0;
			comment.style.borderLeft = '3px solid ' + profiles[user];
		});

		get('.comment-score').forEach(function(target) {
			target.style.paddingLeft = '5px';
		});
	};

	var watchContainerMutations = function(selector) {
		var options = {
			childList: true,
			subtree: true
		};

		get(selector).forEach(function(target) {
			new MutationObserver(updateCommentsColoring).observe(target, options);
		});
	};

	watchContainerMutations('.comments-container');

	watchContainerMutations('.comments');

	watchContainerMutations('.review-content');

	updateCommentsColoring();

})(window);

Revision 7

• Добавлены URL других сайтов сети Stack Exchange
• Исправлен баг с обработкой забаненых пользователей

Revision 8

• Внесены исправления для совместимости с новой разметкой SO
• Комментарии текущего пользователя теперь всегда помечаются красным цветом