/*
*	jQuery.onfontresize
*	Copyright (c) 2008 Petr Staníček (pixy@pixy.cz)
*	February 2009
*
*	requires jQuery

Usage:

jQuery(document).bind('fontresize',myHandler);

Optional:

// stop the observer
jQuery.onFontResize.unwatch();
// start again
jQuery.onFontResize.watch();
// start with different timeout
jQuery.onFontResize.watch(1000);

*/

jQuery.onFontResize = {

    Delay: 250,
    Timer: null,
    on: true,
    Box: null,
    H: 0,

    init: function () {
        this.Box = document.createElement('DIV');
        jQuery(this.Box)
		.html(' xxx')
		.css({
		    position: 'absolute',
		    top: '-999px',
		    left: '-9999px',
		    display: 'inline',
		    lineHeight: 1
		})
		.appendTo('body');
        this.H = jQuery(this.Box).height();
    },

    watch: function (delay) {
        if (!this.Box) this.init();
        this.unwatch();
        if (delay) this.Delay = delay;
        this.on = true;
        this.check();
    },
    unwatch: function () {
        this.on = false;
        if (this.Timer) clearTimeout(this.Timer);
    },

    check: function () {
        var that = jQuery.onFontResize;
        var h = jQuery(that.Box).height();
        if (h != that.H) {
            that.H = h;
            jQuery(document).triggerHandler('fontresize');
        }
        if (that.on) this.Timer = setTimeout(that.check, that.Delay);
    }

}

jQuery(function () {
    jQuery.onFontResize.watch();
});