// Gator functions

var GATOR = {

	switch_tab: function(p)
	{
		var i, e, t;
		
		if (typeof(p) == 'string')
		{
			show_panel = p;
		}
		var panels = $$('.panels');
		
		for (i=0; i<panels.length; ++i)
		{
			e = $(panels[i].id);
			t = $(panels[i].id + '-tab');
			
			if (e)
			{
				if (panels[i].id == show_panel)
				{
					e.style.display = 'block';
					if (t)
					{
						t.className = 'activetab';
					}
				}
				else
				{
					e.style.display = 'none';
					if (t)
					{
						t.className = '';
					}
				}
			}
		}
		this.place_float();
		this.tab_editable();
	},
	
	place_float: function ()
	{
		// place all the floating elements
		var floats = $$(".gator-float");
		
		$$(".gator-float").each( function (s) {
			if (s.left == undefined && s.top == undefined)
			{
				s.left = parseInt(s.style.left);
				s.top = parseInt(s.style.top);
			}
			$(s).setStyle({
				'visibility': 'visible',
				'top': (s.top) + 'px',
				'left': (s.left) + 'px'
			});
		});
	},
	
	make_editable: function ()
	{
		var f = $$('.gator-float');
		
		for (var i=0; i<f.length; ++i)
		{
			f[i].addClassName('post-editable');
			f[i].id = 'drag'+i;
			f[i].t = parseInt(f[i].style.top);
			f[i].l = parseInt(f[i].style.left);
			f[i].w = f[i].getWidth() - 2;
			new Draggable(f[i].id, {revert: false, onEnd: GATOR.get_coords.bindAsEventListener(GATOR, f[i].id)});
		}
	},
	
	tab_editable: function ()
	{
		$$('.post-editable').each( function (s) {
			s.t	= s.cumulativeOffset().top - s.parentNode.cumulativeOffset().top;
			s.l = s.cumulativeOffset().left - s.parentNode.cumulativeOffset().left;
		});
	},
	
	setup_post: function ()
	{
		if ($('subject'))
		{
			$('subject').observe('keyup', GATOR.change_post);
		}
		
		if ($('message'))
		{
			$('message').observe('keyup', GATOR.change_post);
		}
	},
	
	change_post: function ()
	{
		var m = '';
		if ($('post_message') && $('message'))
		{
			m = $F('message');
		}
		
		if (m.length > 3)
		{
			if (GATOR._postTimer)
			{
				clearTimeout(GATOR._postTimer);
			}
			GATOR._postTimer = setTimeout('GATOR.request_post();', 500);
		}
		else
		{
			$('post_message').update('');
		}
		
	},
	
	request_post: function ()
	{
		var s = '';
		var m = '';
		
		if ($('post_subject'))
		{
			s = $F('subject');
		}
		if ($('post_message'))
		{
			m = $F('message');
		}
		
		if (m)
		{
			new Ajax.Request(root_path+'ajax/preview.php',{
				method: 'post',
				parameters: {
					mode: 'body',
					subject: s,
					message: m
				}
			})
		}
		
	},
	
	update_subject: function (s)
	{
		if ($('post_subject'))
		{
			$('post_subject').update(s);
			if (s)
			{
				$('post_subject').show();
			}
			else
			{
				$('post_subject').hide();
			}
		}
	},
	
	update_post: function (s)
	{
		if ($('post_message'))
		{
			$('post_message').update(s);
		}
	},
	
	get_coords: function (event, id)
	{
		var y;
		
		// avoid the annoying scroll issue
		if (typeof(window.pageYOffset) == 'number')
		{
			y = window.pageYOffset;
		}
		else if (document.body && (document.body.scrollTop))
		{
			y = document.body.scrollTop;
		}
		else if (document.documentElement && (document.documentElement.scrollTop))
		{
			y = document.body.scrollTop;
		}
		
		var textarea = $('message');
		var theSelection = false;
		textarea.focus();
		
		var t = parseInt($(id).style.top);
		var l = parseInt($(id).style.left);
		
		var caret_pos = getCaretPosition(textarea).start;
		// Center the cursor when we don't have a selection
		// Gecko and proper browsers
		if (!isNaN(textarea.selectionStart))
		{
			var scrollTop = textarea.scrollTop;
			
			textarea.value = textarea.value.replace('='+$(id).t+','+$(id).l+',','='+t+','+l+',');
			textarea.selectionStart = caret_pos;
			textarea.selectionEnd = caret_pos;
			
			textarea.scrollTop = scrollTop;
		}	
		// IE
		else if (document.selection)
		{
			var range = textarea.createTextRange();
			range.move("character", caret_pos);
			textarea.value = textarea.value.replace('='+$(id).t+','+$(id).l+',','='+t+','+l+',');
			range.select();
			storeCaret(textarea);
		}
		
		$(id).t = t;
		$(id).l = l;
	
		textarea.focus();
		
		if (document.body && (document.body.scrollTop))
		{
			document.body.scrollTop = y;
		}
		else if (document.documentElement && (document.documentElement.scrollTop))
		{
			document.documentElement.scrollTop = y;
		}
		return;
		
		// prevent 'clicking'
		Event.stop(event);
	}

};