// ==UserScript==
// @name           Dirty.ru Title
// @version        0.3.3 - 2012-11-21
// @author         Infocatcher
// @namespace      dev/null
// @run-at         document-start
// @include        http://dirty.ru/comments/*
// @include        http://www.dirty.ru/comments/*
// @include        http://d3.ru/comments/*
// ==/UserScript==

(function reTitle(e) {
    var maxLength = 100;

    if(typeof GM_getValue == "function") { // «"GM_getValue" in this» doesn't work with setTimeout()
        var mm = function(n) {
            return Math.max(15, Math.min(500, isNaN(n) ? 100 : n));
        };
        maxLength = mm(GM_getValue("maxTitleLength", maxLength));
        if("GM_registerMenuCommand" in this && !("_count" in reTitle)) {
            GM_registerMenuCommand("Максимальная длина заголовка…", function() {
                var ml = prompt("Максимальная длина заголовка:", mm(GM_getValue("maxTitleLength", maxLength)));
                if(ml) {
                    GM_setValue("maxTitleLength", mm(ml));
                    reTitle();
                }
            }, "М");
        }
    }

    function tc(elt) {
        return elt && elt.textContent.replace(/^\s+|\s+$/g, "");
    }
    var c = document.getElementsByTagName("h3");
    c = c.length && c[0];
    var text = tc(c) || tc(document.querySelector("div.post > div.dt"));
    //GM_log(e && typeof e == "object" ? "!!! " + e.type : "timer");
    if(!text) {
        if(!("_count" in reTitle)) {
            reTitle._count = 0;
            if(document.readyState == "loading") {
                // With disabled scripts setTimeout doesn't work
                window.addEventListener("DOMContentLoaded", reTitle, false);
                window.addEventListener("load", reTitle, false);
                reTitle._destroy = function() {
                    window.removeEventListener("DOMContentLoaded", reTitle, false);
                    window.removeEventListener("load", reTitle, false);
                };
            }
        }
        if(++reTitle._count < 5*60*1000/10)
            setTimeout(reTitle, 10);
        if(e && typeof e == "object" && e.type == "load")
            reTitle._destroy && reTitle._destroy();
        return;
    }
    reTitle._destroy && reTitle._destroy();
    if(text.length > maxLength) {
        var st = text.substr(0, maxLength);
        if(/[а-яёa-z-]$/i.test(st) && /^[а-яёa-z-]/i.test(text.substr(maxLength)))
            st = st.replace(/\s*[а-яёa-z-]*$/i, "");
        st = st.replace(/[\s.,:;…—–-]+$/i, "");
        if(!st)
            return;
        text = st + "…";
    }
    document.title = text + " – " + location.host.replace(/^www\./, "");
})();