GK parent comment

Adds links to parent commentary to GK comments, and sets parent commentary text as link tooltip.
当前为 2014-06-15 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name	GK parent comment
// @namespace	GK
// @description	Adds links to parent commentary to GK comments, and sets parent commentary text as link tooltip.
// @include	http://govnokod.ru/*
// @include	http://www.govnokod.ru/*
// @version	1.1.0
// @grant	unsafeWindow
// ==/UserScript==

(function(){
$ = unsafeWindow.jQuery;

//dirty, DIRTY hack to wait for certain element to appear. -_- 
//But I have no idea how to do it right.
function waitForSelector(selector, context, mustexist, callback) {
	if (($(selector, context).length>0) == mustexist)
		callback();
	else
		setTimeout(function(){waitForSelector(selector, context, mustexist, callback)}, 50);
	}

//short function for adding custom CSS rules. Why use Greasemonkey specific GM_setStyle() just for that?
function addCSS(rule) {
	var styleElement = document.createElement("style");
	styleElement.type = "text/css";
	if (typeof styleElement.styleSheet !== 'undefined')
		styleElement.styleSheet.cssText = rule;
	else
		styleElement.appendChild(document.createTextNode(rule));
	document.getElementsByTagName("head")[0].appendChild(styleElement);
	}

addCSS([
	'.comment-parent-link {margin-left:10px;font-size:10pt}',
	].join('/n'));

var PARENT = '<a class="comment-link comment-parent-link" href="">↑</a>';

function hijackComments() {
	var oldLoadComments = unsafeWindow.comments['load'];

	function newLoadComments(aElemTrigger) {
		var $parent = $(aElemTrigger).closest('.entry-comments');
		oldLoadComments.call(this,aElemTrigger);
		waitForSelector('.hcomment', $parent, true, function(){
			setParentLinks($parent);
			});
		}

	unsafeWindow.comments['load'] = newLoadComments;
	}

function highlightComment(e) {
	if (! $(e.target).is('a.comment-parent-link')) return;
	var match = $(e.target).attr('href').match(/\#comment(\d+)$/);
	if (match) {
		$('body').find('.highlight').removeClass('highlight');
		$('#comment-'+match[1]).addClass('highlight');
		}
	}
	
function setParentLinks($context) {
	$context.find('.hcomment').each(function(i,e){
		var $this = $(this);
		var $parent = $this.parents('.hcomment:eq(0)');
		if ($parent.length) {
			var $parentlink = $(PARENT);
			$parentlink.attr('href', '#'+$parent.find('a.comment-link:eq(0)').attr('name'));
			$parentlink.attr('title', $parent.find('.comment-text:eq(0)').text());
			$this.find('a.comment-link:eq(0)').after($parentlink);
			}
		});
	}

setParentLinks($('body'));
hijackComments();
$('body').click(highlightComment);
})();