A Fluid userscript to show the unread message count for a Gmail SSB.

gmail.newMessageCount.js

/**
 * A userscript for Fluid. This script updates the dock badge for a Gmail SSB
 * to the number of unread messages in the Inbox.
 * 
 * NOTE: For best results, make sure the User Agent is set to a Safari agent.
 */

initialize();

function initialize() {
    updateDockBadge();
}

function getUnreadBadge() {
    var regex = /\s*Inbox\s*\((\d+)\)[^\d]*/;

    var inboxLink = document.querySelectorAll('[role=navigation] a');
    if (!inboxLink.length) {
        return '';
    }
    
    var matches = inboxLink[0].innerText.match(regex);

    if (!matches || matches.length < 2) {
        return '';
    }
    
    return matches[1];
}


function updateDockBadge() {
    window.fluid.dockBadge = getUnreadBadge();
    setTimeout(updateDockBadge, 1000);
}