// prototype newsticker by http://www.intrafusion.co.uk/blog/bbc-style-news-ticker-prototype-or-mootools //

var ticker = Class.create({
	initialize: function(container, options) {
		this.container = container;
		this.options = Object.extend(options || {},{
			frequency: 500,
			item_frequency: 1000,
			char_frequency: 50,
			endBits: ['_','-']
		});
		this.current = 0;
		this.currentChar = 0;
		this.startTick();
	},
	startTick: function() {
		this.container.each(function(item) {
			item.hide();
		});
		setTimeout(this.onTick.bind(this), this.options.frequency);
	},
	onTick: function() {
		if(this.currentChar==0) {
			if (this.current_item) {
				this.current_item.hide();
			}
			this.current_item = this.container[this.current%this.container.length];
			this.current_item.show();
			this.current_element = this.current_item.firstDescendant()
			this.current_title = this.current_element.innerHTML;
			this.current++;
		}

		this.current_element.innerHTML = this.current_title.substring(0,this.currentChar) + this.options.endBits[this.currentChar&this.options.endBits.length-1];
		if(this.currentChar==this.current_title.length) {
			this.current_element.innerHTML = this.current_title.substring(0,this.current_title.length);
			this.currentChar=0;
			var t = this.options.item_frequency || 1000;
		} else {
			this.currentChar++;
			var t = this.options.char_frequency || 50;
		}
		setTimeout(this.onTick.bind(this),t);
	}
});