addReply2MobileChat.js

// ==UserScript==
// @name        Añadir Reply
// @description Añadir flechas

// @include     *://chat.stackexchange.com/*

// @require https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js

// @version     1.1

// ==/UserScript==

var icono = "<img src='https://i.stack.imgur.com/fvR5F.png'> ";

//https://cdn4.iconfinder.com/data/icons/ionicons/512/icon-reply-all-16.png

unsafeWindow.responder =  function(elem){
    elem.click();
    var content = $('#input').val();
    if(content === ""){
        $('#input').val(":"+elem.id +" ");
    }else{
        if(content.startsWith(":")){
            $('#input').val(":"+elem.id + content.replace(/(:\d+)/, ""));
        }else{
            $('#input').val(":"+elem.id +" " +content);
        }
    }
    $('#input').focus();
};

unsafeWindow.colocarFlecha = function(){
    $('div[id^="message-"]').each(function(){
        var id = $(this).attr('id');

        var value = id.substring(id.lastIndexOf("-")+1);
        if(!$(this).hasClass("flecha")){
            $(this).find('div[class="content"]').before("<div name='flecha' id='" + value +"' title='responder' onclick='responder(this)' style='visibility:hidden'>" +icono+ "</div>");

            $(this).addClass("flecha");

            $(this).mouseenter(function(event)
            {
                event.stopPropagation();
                $("#"+ value).css('visibility','visible');
            }).mouseleave(function(event)
            {
                event.stopPropagation();
                $("#"+ value).css('visibility','hidden');
            });
        }

        if($(this).hasClass("removed")){
           $('#'+ value).remove();
        }

    });

    $('span[class="deleted"]').each(function(){
        $(this).parent().parent().addClass("removed");
    });
};

$( document ).ready(function() {

        setInterval(function() {
            colocarFlecha();
        }, 500);

});