// ==UserScript==
// @name         NGA Re-collapse Button
// @namespace    https://greasyfork.org/zh-CN/scripts/28612-nga-re-collapse-button
// @version      0.0.2.20170412
// @icon         http://bbs.nga.cn/favicon.ico
// @description  NGA 折叠内容展开后可再次收起
// @author       AgLandy
// @include      /^https?://(bbs\.ngacn\.cc|nga\.178\.com|bbs\.nga\.cn)/.+/
// @grant        none
// @require      http://cdn.bootcss.com/jquery/3.2.1/jquery.min.js
// @downloadURL none
// ==/UserScript==

//发布地址：http://bbs.ngacn.cc/read.php?tid=11313839

var $Q = jQuery.noConflict();

(function(){

    var c = $Q('.collapse_btn');
    for(i = 0; c.length > i; i++){
        $Q(c[i]).children('button').attr('onclick', $Q(c[i]).children('button').attr('onclick').replace(/^t.+,"/, 'cBtnClick(event,"'));
        $Q(c[i]).children('button').css({width:'18px', outline:'none'});
        $Q(c[i]).html($Q(c[i]).html().replace(/点击显示隐藏的内容/, '点击显示折叠的内容').replace(/<\/button>/, '</button><div style="display:inline">') + '</div><div style="display:none"> 点击收起折叠的内容 ...</div>');
    }

    var sc = "\
    function cBtnClick(e, c, n){\
        var b = e.target;\
        if(b.parentNode.nextSibling.innerHTML == ''){\
            b.innerHTML = '-';\
            b.nextSibling.style.display = 'none';\
            b.nextSibling.nextSibling.style.display = 'inline';\
            ubbcode.collapse.load(b.parentNode.nextSibling, c, n);\
            return;\
        }\
        if(b.innerHTML == '+'){\
            b.innerHTML = '-';\
            b.nextSibling.style.display = 'none';\
            b.nextSibling.nextSibling.style.display = 'inline';\
            b.parentNode.nextSibling.style.display = 'block';\
        }\
        else{\
            b.innerHTML = '+';\
            b.nextSibling.style.display = 'inline';\
            b.nextSibling.nextSibling.style.display = 'none';\
            b.parentNode.nextSibling.style.display = 'none';\
        }\
    }\
    function tlClick(e, n){\
        var i = e.target.parentNode;\
        if(!i.nextSibling.firstChild)\
            eval('i.nextSibling.innerHTML = ubbcode.manualLoadCache[\"' + n + '\"];');\
        i.style.display = 'none';\
        i.nextSibling.style.display = '';\
    }\
    ";

    $Q('head').append($Q('<script type="text/javascript" />').html(sc));


    //  ↓  大图与缩略图可相互切换，如不需要，可整段注释掉。

    function tlF(){
        if($Q('.thumblink').next('span').length){
            var tl = $Q('.thumblink');
            $Q('<a href="javascript:void(0)" onclick="this.previousSibling.style.display=\'\';this.style.display=\'none\'">').insertAfter(tl);
            for(i = 0; tl.length > i; i++)
                $Q(tl[i]).attr('onclick', $Q(tl[i]).attr('onclick').replace(/^t.+\[/, 'tlClick(event,').replace(/\].+"none"/, ')'));
        }
    }
    tlF();

    var tlMO = new MutationObserver(function(){
        tlF();
    });

    tlMO.observe(document.body, {
        childList: true,
        subtree: true
    });

    //  ↑  大图与缩略图可相互切换

})();