// http://infocatcher.ucoz.net/js/cb/toggleGifAnimation.js
// https://forum.mozilla-russia.org/viewtopic.php?id=57977
// https://github.com/Infocatcher/Custom_Buttons/tree/master/Toggle_GIF_Animation

// Toggle GIF Animation button for Custom Buttons
// (code for "code" section)

// (c) Infocatcher 2013
// version 0.1.0 - 2013-02-05

function _localize(s, key) {
    var strings = {
        "GIF Animation:": {
            ru: "GIF-анимация:"
        },
        "Enabled": {
            ru: "Включена"
        },
        "Disabled": {
            ru: "Выключена"
        }
    };
    var locale = Application.prefs.getValue("general.useragent.locale", "en").match(/^[a-z]*/)[0];
    _localize = !locale || locale == "en"
        ? function(s) {
            return s;
        }
        : function(s) {
            return strings[s] && strings[s][locale] || s;
        };
    return _localize.apply(this, arguments);
}

var win = content;

var utils = getUtils(win);
var ic = Components.interfaces.imgIContainer;
var am = utils.imageAnimationMode = utils.imageAnimationMode == ic.kNormalAnimMode
    ? ic.kDontAnimMode
    : ic.kNormalAnimMode;
Array.forEach(win.frames, parseWin);

Components.classes["@mozilla.org/alerts-service;1"]
    .getService(Components.interfaces.nsIAlertsService)
    .showAlertNotification(
        this.image || "chrome://mozapps/skin/extensions/extensionGeneric.png",
        _localize("GIF Animation:"),
        am == ic.kNormalAnimMode
            ? _localize("Enabled")
            : _localize("Disabled")
    );

function getUtils(win) {
    return win.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
        .getInterface(Components.interfaces.nsIDOMWindowUtils);
}
function parseWin(win) {
    Array.forEach(win.frames, parseWin);
    var utils = getUtils(win);
    try {
        utils.imageAnimationMode = am;
    }
    catch(e) { // NS_ERROR_NOT_AVAILABLE
    }
}