Answer to...

Shows the comment for which this comment is an answer

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

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

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

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

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// Answer to... 
// https://github.com/Inversion-des/Habrahabr--Answer-to

// ==UserScript==
// @name			Answer to...
// @description		Shows the comment for which this comment is an answer
// @namespace		Habrahabr
// @version        	1.3.10
// @include			https://geektimes.com/*
// @include			https://habr.com/*
// @supportURL	    https://github.com/Inversion-des/Habrahabr--Answer-to/issues
// ==/UserScript==


	
/*	
класс стрелочки вверх — up-to-parent
href — #comment_1706843

ID ответа — comment_1706843
	класс заголовка — div info
	класс тела — div message
*/

"use strict";

!function(win) {

if (window != window.top) return
var doc = win.document

win.addEventListener("load", function() {
	var comments_cont = doc.getElementById('comments')
	if (comments_cont) {
	
		var msgStyle = "\
			background-color:white;\
			padding:3px 2px 0 5px;\
			position:absolute;\
			z-index:1;\
			overflow-y:auto;\
			-webkit-box-shadow:  0px 3px 12px 3px rgba(0, 0, 0, 0.3);\
			-moz-box-shadow: 0px 3px 12px 3px rgba(0, 0, 0, 0.3);\
			box-shadow: 0px 3px 12px 3px rgba(0, 0, 0, 0.3);"
		
		// готовим контейнер для просмотра
		win.msgContainer_cont = doc.createElement("div")
		win.msgContainer_cont.className = "content-list__item_comment comments_list_answerTo"
		win.msgContainer_cont.innerHTML = '<div class="comment" style="'+msgStyle+'"></div>'
		win.msgContainer_cont.style.cssText = "position:fixed;top:0px;left:0px;display:none;z-index:99;margin:0 !important;padding:0 !important;overflow:visible;text-align:left;"
		doc.body.appendChild(win.msgContainer_cont)
		win.msgContainer = win.msgContainer_cont.firstChild
 	
 		// прописываем ховер стрелочкам всех комментов
		var arrows = comments_cont.getElementsByClassName('js-comment_parent')
		$.each(arrows, activateArrow)
		
		// таймер для активации новых комментариев
		setInterval(function() {
			var $ = win.jQuery
			if ($) {
				var newComments = $('.comment .is_new .to_parent')
				for (var i=0, li=newComments.length; i<li; i++) {
					var link = newComments[i]
					if (link.getAttribute('oninit') != 'activaded') {
						activateArrow(link)
						link.setAttribute('oninit', 'activaded')
					}
				}
			}
		}, 2000)
			
		// на клик — прячем коммент
		win.addEventListener("mousedown", hideTargetComment, false)
		
	}   // if comments_cont
	
}, false);

function activateArrow(index, arrEl) {
	arrEl.addEventListener("mouseover", function(){
		showTargetComment(this.getAttribute('href'), arrEl)
	}, false)
	arrEl.addEventListener("mouseout", hideTargetComment, false)
}

function showTargetComment(href, arrEl) {
	// ищем объект по id
	var id = href.replace(/^.*?#/, '')
	var target = doc.getElementById(id)
	
	// чистим контейнер
	while (win.msgContainer.childNodes.length) {win.msgContainer.removeChild(win.msgContainer.childNodes[0])}
	
	// заполняем контейнер новым комментом
	var comment_body = target
//	for (var i=0, l=target.childNodes.length; i<l; i++) {
//		var tmp = target.childNodes[i]
//		if (/comment_body/.test(tmp.className)) {
//			comment_body = tmp
//			break
//		}
//	}
	if (comment_body) {
		for (var i=0, l=comment_body.childNodes.length; i<l; i++) {
			var tmp = comment_body.childNodes[i]
			if (/head|message/.test(tmp.className)) {
				win.msgContainer.appendChild(tmp.cloneNode(true))
			}
			// выходим из цикла
			if (tmp.className == "message") break
		}
	}
	
	// подгоняем ширину под блок комментариев
	var pageComments_cont = doc.getElementById('comments')
	win.msgContainer_cont.style.width = pageComments_cont.offsetWidth+absLeft(pageComments_cont)+2 + 'px'
	
	
	var targetTop = absTop(target)
	var windowScrollPos = doc.documentElement.scrollTop || doc.body.scrollTop
		
	// inline highlight
	win.msgContainer.style.top = targetTop>windowScrollPos  ?  targetTop-windowScrollPos-3 +'px'  :  0
	
	// height auto adjustment
	if (targetTop<windowScrollPos) {
		var currentCommentTop = absTop(arrEl.parentNode.parentNode)
		var targetCommentHeight = target.offsetHeight
		var delta = (windowScrollPos + targetCommentHeight)  -  (currentCommentTop-10)
		win.msgContainer.style.maxHeight = delta>0  ?  targetCommentHeight-delta +'px'  :  ''
	}
	else {
		win.msgContainer.style.maxHeight = ''
	}

	// показываем
	win.msgContainer.parentNode.style.display = "block"
	
	// отступы
	win.msgContainer.style.marginLeft = absLeft(target)-5+'px'
	win.msgContainer.style.width = win.msgContainer.parentNode.offsetWidth-parseInt(win.msgContainer.style.marginLeft)+'px'
}   // showTargetComment

function hideTargetComment() {
	win.msgContainer.parentNode.style.display = "none"
}

function absLeft(o) {
	var l = 0
	do {
		if (o.offsetLeft) l += o.offsetLeft-o.scrollLeft;
	} while (o = o.offsetParent)
	return l
}
function absTop(o) {
	var l = 0
	do {
		if (o.offsetTop) l += o.offsetTop-o.scrollTop;
	} while (o = o.offsetParent)
	return l
}

}(typeof unsafeWindow == 'undefined' ? window : unsafeWindow)