// ==UserScript==
// @name         NGA Pins
// @namespace    https://greasyfork.org/zh-CN/scripts/36246-nga-pins
// @version      0.0.9.20180215
// @icon         http://bbs.nga.cn/favicon.ico
// @description  NGA Pins 可将顶部菜单、导航栏、页码栏固定在窗口顶部，亦可通过设置取消其中某项；主帖内容较长时将作者信息固定在主帖左侧（不包含回复）
// @author       AgLandy
// @include      /^https?:\/\/(bbs\.ngacn\.cc|nga\.178\.com|bbs\.nga\.cn)/
// @grant        none
// @license      MIT License
// @downloadURL none
// ==/UserScript==

//发布地址：http://bbs.ngacn.cc/read.php?tid=13033636

if(typeof jQuery == 'undefined'){
    let s = document.createElement('script');
    s.type = 'text/javascript';
    s.src = 'https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js';
    s.onload = s.onreadystatechange = function(){
        if(!this.readyState || 'loaded' === this.readyState || 'complete' === this.readyState){
            main(jQuery.noConflict());
            this.onload = this.onreadystatechange = null;
        }
    };
    document.head.appendChild(s);
}
else
    main(jQuery);

function main($Q){

    if(!window.commonui)
        return;

    var pins = commonui.pins = {};

    function testStorage(s){
        if(!!s){
            try{
                s.testkey = 'testvalue';
                s.removeItem('testkey');
                return true;
            }
            catch(e){
                return false;
            }
        }
        else
            return false;
    }

    function init(){
        let args = {};
        if(localStorage.pins)
            args = JSON.parse(localStorage.pins);
        else{
            args = {a: 56, b: 42, c: 43};
            localStorage.pins = JSON.stringify(args);
        }
        __SETTING.pins = function(){
            this.o = commonui.createCommmonWindow();
            this.o._.addContent(null);
            var $ = window._$;
            this.o._.addTitle('Pins 设置');
            let update = function(t){
                if(t.checked)
                    pins.args[t.name] = parseInt(t.value);
                else
                    pins.args[t.name] = 0;
                localStorage.pins = JSON.stringify(pins.args);
                pins.update();
            },
                z = [['a', '56', '顶部菜单'], ['b','42', '导航栏'], ['c','43', '页码栏']];
            for(let i = 0; i < z.length; i++){
                let k = $('/input').$0('type','checkbox','checked',0,'name',z[i][0],'value',z[i][1])._.on('click', function(e){update(e.target);});
                this.o._.addContent(
                    k,
                    z[i][2],
                    $('/br')
                );
                if(pins.args[z[i][0]])
                    k._.attr('checked', 1);
            }
            this.o._.show();
        };
        commonui.mainMenu.data[401] = {innerHTML: 'Pins 设置', on: {event: 'click', func: function(){__SETTING.pins();}}, parent: 18};
        commonui.mainMenu.data[18].subKeys.push(401);
        return args;
    }

    $Q('<style type="text/css" />').html(' #m_pbtntop tbody {pointer-events:auto;} ').appendTo('head');

    pins.update = function(){

        let args = pins.args,
            hA = args.a + 8,
            hB = args.b && args.b + 8,
            hC = args.c && args.c + 8,
            a = $Q('#mainmenu'),
            b = $Q('#m_nav'),
            c = $Q('#m_pbtntop'),
            t = $Q('#posterinfo0').closest('td'),
            h = c.length && c.offset().top - hA - hB || b.offset().top - hA,
            z = [[a, 'pinsTopBar'], [b, 'pinsNavBar'], [c, 'pinsPageBar'], [t, 'pinsAuthorInfo']],
            newDiv = function(i){
                return $Q('<div id="' + z[i][1] + '" />').append(z[i][0].children()).appendTo(z[i][0]);
            };

        //还原默认
        for(let i = 0; i < z.length; i++){
            if($Q('#' + z[i][1]).length)
                $Q('#' + z[i][1]).contents().unwrap();
        }
        $Q(window).unbind('.pins');

        //顶部菜单
        if(args.a){
            let d = newDiv(0);
            d.css({'height':a.css('height'), 'width':'100%', 'overflow':'hidden', 'position':'fixed', 'top':'0px', 'z-index':'3', 'opacity':'0.95'});
            $Q(window).bind('scroll.pins', function(){
                if($Q(window).scrollTop() > $Q('#custombg').height())
                    d.css({'border-bottom':'1px solid #' + __COLOR.shadow1.replace(/;.+;/,'').replace(/^.+#/,'')});
                else
                    d.css({'border-bottom':''});
            });
        }

        //导航栏
        if(args.b){
            let d = newDiv(1);
            b.css({'height':b.css('height')});
            b.find('.bbsinfo').prependTo(b);
            $Q(window).bind('scroll.pins', function(){
                if($Q(window).scrollTop() > h)
                    d.css({'position':'fixed', 'top':hA + 'px', 'z-index':'3', 'opacity':'0.95'});
                else
                    d.css({'position':'', 'top':'', 'z-index':'', 'opacity':''});
            });
        }

        //页码栏
        if(args.c){
            let d = newDiv(2);
            c.css({'height':c.css('height')});
            $Q(window).bind('scroll.pins', function(){
                if($Q(window).scrollTop() > h)
                    d.css({'width':'calc(100% - 20px)', 'position':'fixed', 'top':(hA + hB) + 'px', 'z-index':'2', 'opacity':'0.95', 'pointer-events':'none'});
                else
                    d.css({'width':'', 'position':'', 'top':'', 'z-index':'', 'opacity':''});
            });
        }

        //作者信息
        if($Q('#posterinfo0').length && $Q('#posterinfo0').closest('td').outerHeight() > 600){
            t.css({'min-width':'197px'});
            let d = newDiv(3),
                h1 = hA + hB + hC + 6,
                h2 = d.offset().top - h1,
                w = function(){
                    d.css('width', t.css('width'));
                };
            if(/firefox/.test(navigator.userAgent.toLowerCase())){
                $Q('.postcontent').bind('click.pins', function(){setTimeout(w,5);});
                $Q(window).bind('transitionend.pins', function(){setTimeout(w,5);});
            }
            else{
                let mo = new MutationObserver(w);
                mo.observe($Q('#posterinfo0').closest('table')[0], {
                    childList: true,
                    subtree: true,
                    attributes: true
                });
            }
            $Q(window).bind('resize.pins', w);
            $Q(window).bind('scroll.pins', function(){
                if($Q(window).scrollTop() > h2 && $Q(window).scrollTop() < t.height() - d.height() + h2)
                    d.css({'width':t.css('width'), 'position':'fixed', 'top':h1 + 'px'});
                else if($Q(window).scrollTop() >= t.height() - d.height() + h2)
                    d.css({'width':t.css('width'), 'position':'fixed', 'top':(h1 - $Q(window).scrollTop() + t.height() - d.height() + h2) + 'px'});
                else
                    d.css({'width':'', 'position':'', 'top':''});
            });
        }

        $Q(window).triggerHandler('scroll.pins');

    };

    pins.args = !testStorage(window.localStorage) ? {a: 56, b: 42, c: 43} : init();

    pins.update();

}