恢复GMail选择栏（All None Read Unread….)的油猴(GreaseMonkey)脚本

最近Gmail进行了升级，界面看起来酷了不少，尤其是联系人管理可用性提高了不少，但是美中不足的是以前巨方便的快速选择框不见，现在我要想将已读邮件Archive必须得从下拉框中选择，很是不方便，上网搜索了一下，找到了这个GreaseMonkey Script.该脚本可能在找回丢失的上方快速选择栏,不过没有我最希望的下方快速选择栏,没办法只好自已修改了一下,现在两个快速选择栏都有了,赞一下. 有兴趣的可以安装一下.

// ==UserScript==
// @name           Gmail - Add "Unread" Selector Link
// @namespace      http://userscripts.org/users/86416
// @include        https://mail.google.com/mail/*
// ==/UserScript==
function insertAfter(el,ref) { 
    var container, ns; 
    if ( (container=ref.parentNode) && (ns=ref.nextSibling) ) { 
        container.insertBefore(el,ns);
    } 
    else if (container) { 
        container.appendChild(el);
    }
}
var checkCount = 0
function addUnreadLink() {
    if (document.getElementById('messageselector')!=null) {
        return;
    }
    var anchors = document.querySelectorAll('input[type="checkbox"]');
    if (anchors && anchors.length>0) {
        var anchorTop = null;
        var anchorBottom = null;
        for (var i=0; i<anchors.length; i++) {
            var pn = anchors[i].parentNode;
            if (pn.getAttribute('role')=="button" && pn.getAttribute('aria-haspopup')=="true" && pn.id == ":q6") {
                anchorTop = pn;
            }
            
            if (pn.getAttribute('role')=="button" && pn.getAttribute('aria-haspopup')=="true" && pn.id == ":q2") {
                anchorBottom = pn;
            }
        }
        
        if (anchorTop || anchorBottom) {
        
            var containerTop = anchorTop.parentNode.parentNode.parentNode.parentNode.parentNode;
            var containerBottom = anchorBottom.parentNode.parentNode.parentNode.parentNode.parentNode;
            var divTop = document.createElement('div');
            divTop.innerHTML = ''+
            '    <div id="messageselector" class="nH">'+
            '      <div class="nH">'+
            '        <div role="navigation" class="yV" style="padding-left:60px;">'+
            '          Select: <span class="yU">'+
            '              <span tabindex="0" role="link"  id="select-all">All</span>, '+
            '              <span tabindex="0" role="link"  id="select-none">None</span>, '+
            '              <span tabindex="0" role="link"  id="select-read">Read</span>, '+
            '              <span tabindex="0" role="link"  id="select-unread">Unread</span>, '+
            '              <span tabindex="0" role="link"  id="select-starred">Starred</span>, '+
            '              <span tabindex="0" role="link"  id="select-unstarred">Unstarred</span>'+
            '          </span>'+
            '        </div>'+
            '      </div>'+
            '    </div>';
            var divBottom = document.createElement('div');
            divBottom.innerHTML = ''+
            '    <div id="messageselector" class="nH">'+
            '      <div class="nH">'+
            '        <div role="navigation" class="yV" style="padding-left:60px;">'+
            '          Select: <span class="yU">'+
            '              <span tabindex="0" role="link" id="select-all-bottom">All</span>, '+
            '              <span tabindex="0" role="link" id="select-none-bottom">None</span>, '+
            '              <span tabindex="0" role="link" id="select-read-bottom">Read</span>, '+
            '              <span tabindex="0" role="link" id="select-unread-bottom">Unread</span>, '+
            '              <span tabindex="0" role="link" id="select-starred-bottom">Starred</span>, '+
            '              <span tabindex="0" role="link" id="select-unstarred-bottom">Unstarred</span>'+
            '          </span>'+
            '        </div>'+
            '      </div>'+
            '    </div>';
            insertAfter(divTop,containerTop);
            insertAfter(divBottom,containerBottom)
            
            var handler = function(type,e) {
         
                e.preventDefault();
                e.stopPropagation();

                var e2 = document.createEvent('MouseEvents');
                e2.initEvent('mousedown',true,false); 
                var el = anchorTop.wrappedJSObject;
                el.dispatchEvent(e2);

                setTimeout(function() {
                    var el = document.querySelectorAll('div[selector='+type+'] > div')[0].wrappedJSObject;
                    var e2 = document.createEvent('MouseEvents');
                    e2.initEvent('mouseup',true,false); 
                    el.dispatchEvent(e2);
                },100);
            }
                 
            // Attach the click handlers
            document.getElementById('select-all').addEventListener('click',function(e) { handler('all',e); } ,false);
            document.getElementById('select-none').addEventListener('click',function(e) { handler('none',e); } ,false);
            document.getElementById('select-read').addEventListener('click',function(e) { handler('read',e); } ,false);
            document.getElementById('select-unread').addEventListener('click',function(e) { handler('unread',e); } ,false);
            document.getElementById('select-starred').addEventListener('click',function(e) { handler('starred',e); } ,false);
            document.getElementById('select-unstarred').addEventListener('click',function(e) { handler('unstarred',e); } ,false);
            
             
            document.getElementById('select-all-bottom').addEventListener('click',function(e) { handler('all',e); } ,false);
            document.getElementById('select-none-bottom').addEventListener('click',function(e) { handler('none',e); } ,false);
            document.getElementById('select-read-bottom').addEventListener('click',function(e) { handler('read',e); } ,false);
            document.getElementById('select-unread-bottom').addEventListener('click',function(e) { handler('unread',e); } ,false);
            document.getElementById('select-starred-bottom').addEventListener('click',function(e) { handler('starred',e); } ,false);
            document.getElementById('select-unstarred-bottom').addEventListener('click',function(e) { handler('unstarred',e); } ,false);
        }
    }
    if (checkCount++ < 10) {
        setTimeout(addUnreadLink,200);
    }
}

window.addEventListener('load',function() {
    setTimeout(addUnreadLink,500);
},false);