Turn AutoHide Shell Extension "Upside-Down"

[HMSS013]

is it possibly to tweak FP Murphys AutoHide Gnome Shell extension to work with Reflection?

...just to tweak the code so it hides downward instead of upward? so it can be used at the bottom of the screen...

//
//  Copyright (c) 2011 Finnbarr P. Murphy.  All rights reserved.
//
//

const Lang = imports.lang;
const Shell = imports.gi.Shell;
const St = imports.gi.St;
const Main = imports.ui.main;
const Tweener = imports.ui.tweener;

// change these to suit your own tastes and your system
const PANEL_HEIGHT = 25;
const AUTOHIDE_ANIMATION_TIME = 0.4;
const TIME_DELTA = 1500;


function AutoHide() {
    this._init()
}
 
AutoHide.prototype = {
    _init: function() {
        this._buttonEvent = 0;
        this._leaveEvent = 0;
        this._enterEvent = 0;

        this._hidden = false;
        this._hidetime = 0;
        this._hideable = true;
    },

    _hidePanel: function() {
        if (Main.overview.visible || this._hideable == false) return;

        Tweener.addTween(Main.panel.actor,
                     { height: 1,
                       time: AUTOHIDE_ANIMATION_TIME,
                       transition: 'easeOutQuad'
                     });

        let params = { y: 0,
                       time: AUTOHIDE_ANIMATION_TIME,
                       transition: 'easeOutQuad'
                     };

        Tweener.addTween(Main.panel._leftCorner.actor, params);
        Tweener.addTween(Main.panel._rightCorner.actor, params);

        params = { opacity: 0,
                   time: AUTOHIDE_ANIMATION_TIME - 0.1,
                   transition: 'easeOutQuad'
                 };

        Tweener.addTween(Main.panel._leftBox, params);
        Tweener.addTween(Main.panel._centerBox, params);
        Tweener.addTween(Main.panel._rightBox, params);

        this._hidden = true;
    },

    _showPanel: function() {
        if (this._hidden == false) return;

        let params = { y: PANEL_HEIGHT - 1,
                       time: AUTOHIDE_ANIMATION_TIME + 0.1,
                       transition: 'easeOutQuad'
                     };
 
        Tweener.addTween(Main.panel._leftCorner.actor, params);
        Tweener.addTween(Main.panel._rightCorner.actor, params);

        Tweener.addTween(Main.panel.actor,
                     { height: PANEL_HEIGHT,
                       time: AUTOHIDE_ANIMATION_TIME,
                       transition: 'easeOutQuad'
                     });

        params = { opacity: 255,
                   time: AUTOHIDE_ANIMATION_TIME+0.2,
                   transition: 'easeOutQuad'
                 };

        Tweener.addTween(Main.panel._leftBox, params);
        Tweener.addTween(Main.panel._centerBox, params);
        Tweener.addTween(Main.panel._rightBox, params);

        this._hidden = false;
    },

    _toggleChrome: function(bool) {
        let mlm = Main.layoutManager;
        mlm.removeChrome(mlm.panelBox);
        mlm.addChrome(mlm.panelBox, { affectsStruts: bool });
    },

    _toggleHideable: function(actor, event) {
        let ticks = event.get_time();
 
        if (this._hidetime == 0) {
            this._hidetime = ticks;
            return;
        }

        if ((ticks - this._hidetime) > TIME_DELTA) {
            this._hidetime = 0;
            return;
        }

        if (this._hideable == true) {
            this._hideable = false;
            this._toggleChrome(true);
        } else {
            this._hideable = true;
            this._toggleChrome(false);
        }

        this._hidetime = 0;
    },
 
    enable: function() {
        this._leaveEvent = Main.panel.actor.connect('leave-event', 
                                Lang.bind(Main.panel, this._hidePanel));
        this._enterEvent = Main.panel.actor.connect('enter-event', 
                                Lang.bind(Main.panel, this._showPanel));
        this._buttonEvent = Main.panel.actor.connect('button-release-event', 
                                Lang.bind(Main.panel, this._toggleHideable));

        this._toggleChrome(false);
        this._hideable = true;
        this._hidePanel();
    },
 
    disable: function() {
        if (this._buttonEvent) {
            Main.panel.actor.disconnect(this._buttonEvent);
            this._buttonEvent = 0;
        }
        if (this._leaveEvent) {
            Main.panel.actor.disconnect(this._leaveEvent);
            this._leaveEvent = 0;
        }
        if (this._enterEvent) {
            Main.panel.actor.disconnect(this._enterEvent);
            this._enterEvent = 0;
        }

        this._toggleChrome(true);
        this._hideable = true;
        this._showPanel();
    }

};
 
function init() {
    return new AutoHide();
}