/**********************************************************************
* 
*
*
**********************************************************************/

//var DEBUG = DEBUG != null ? DEBUG : true


/*********************************************************************/

function makePanel(title, open, editable_title, keep_empty){
	title = title == null || title.trim() == '' ? ' ' : title

	// tool panel...
	var panel = $('<details/>')
		.prop('open', open == null ? true : open)
		.addClass('panel noScroll')
		.append($('<summary>'+title+'</summary>')
			.attr({
				contenteditable: editable_title == null ? 'false' : 'true',
			})
			.append($('<span/>')
				.addClass('close-button')
				.click(function(){
					panel
						.trigger('panelClosing')
						.remove()
					return false
				})
				.html('&times;')))
		.draggable({
			containment: 'parent',
			scroll: false,
			// XXX this makes things quite a bit slower...
			//stack: '.panel, .sub-panel',
			stack: '.panel',
			//snap: ".panel", 
			//snapMode: "outer",
		})
		.css({
			// for some reason this is overwritten by jquery-ui to 'relative'...
			//position: '',
			position: 'absolute',
		})

	// wrapper for sub-panels...
	// XXX dragging out, into another panel and back out behaves oddly:
	// 		should:
	// 			either revert or create a new panel
	// 		does:
	// 			drops to last placeholder
	// XXX the helper should be above all other panels...
	var content = $('<span class="panel-content content">')
		.sortable({
			forcePlaceholderSize: true,
			opacity: 0.7,
			connectWith: '.panel-content',
			zIndex: 9999,

			start: function(e, ui){
				ui.item.data('isoutside', false)
				ui.placeholder
					.height(ui.helper.outerHeight())
					.width(ui.helper.outerWidth())
				// show all hidden panels...
				$('.side-panel').each(function(){
					var p = $(this)
					if(p.attr('autohide') == 'on'){
						p.attr('autohide', 'off')
						p.data('autohide', true)
					} else {
						p.data('autohide', false)
					}
				})
			},
			// create a new panel when dropping outside of curent panel...
			beforeStop: function(e, ui){
				var c = 0

				// do this only when dropping outside the panel...
				if(ui.item.data('isoutside')
						// prevent draggingout the last panel...
						// NOTE: 2 because we are taking into account 
						// 		the placeholders...
						&& panel.find('.sub-panel').length > 2){
					// compensate for removed item which is still in the
					// panel when we count it...
					// ...this is likely to the fact that we jquery-ui did
					// not cleanup yet
					c = 1
					var new_panel = makePanel()
						.css(ui.offset)
						.appendTo(panel.parent())
					new_panel.find('.panel-content')
							.append(ui.item)
					panel.trigger('newPanel', [new_panel])
				}

				// remove the panel when it runs out of sub-panels...
				if(!keep_empty && panel.find('.sub-panel').length-c <= 0){
					panel
						.trigger('panelClosing')
						.remove()
				}

				// reset the auto-hide of the side panels...
				$('.side-panel').each(function(){
					var p = $(this)
					if(p.data('autohide')){
						p.attr('autohide', 'on')
					}
				})

				ui.item.data('isoutside', false)
			},
			over: function(e, ui){
				ui.item.data('isoutside', false)
			},
			out: function(e, ui){
				ui.item.data('isoutside', true)
			},
		})
		.appendTo(panel)
	return panel
}


// side can be:
// 	- left
// 	- right
// XXX in part this is exactly the same as makePanel
function makeSidePanel(side, autohide){
	autohide = autohide == null ? 'on' : 'off'
	var panel = $('.side-panel.'+side)
	// only one panel from each side can exist...
	if(panel.length != 0){
		return panel
	}
	panel = $('<div/>')
		.addClass('side-panel panel-content ' + side)
		.sortable({
			forcePlaceholderSize: true,
			opacity: 0.7,
			connectWith: '.panel-content',
			zIndex: 9999,

			start: function(e, ui){
				ui.item.data('isoutside', false)
				ui.placeholder
					.height(ui.helper.outerHeight())
					.width(ui.helper.outerWidth())
				// show all hidden panels...
				$('.side-panel').each(function(){
					var p = $(this)
					if(p.attr('autohide') == 'on'){
						p.attr('autohide', 'off')
						p.data('autohide', true)
					} else {
						p.data('autohide', false)
					}
				})
			},
			// create a new panel when dropping outside of curent panel...
			beforeStop: function(e, ui){
				// do this only when dropping outside the panel...
				if(ui.item.data('isoutside')){
					var new_panel = makePanel()
						.css(ui.offset)
						.appendTo(panel.parent())
					new_panel.find('.panel-content')
							.append(ui.item)
					panel.trigger('newPanel', [new_panel])
				}

				// reset the auto-hide of the side panels...
				$('.side-panel').each(function(){
					var p = $(this)
					if(p.data('autohide')){
						p.attr('autohide', 'on')
					}
				})

				ui.item.data('isoutside', false)
			},
			over: function(e, ui){
				ui.item.data('isoutside', false)
			},
			out: function(e, ui){
				ui.item.data('isoutside', true)
			},
		})
		.dblclick(function(e){
			var elem = $(this)
			if(elem.attr('autohide') == 'off'){
				elem.attr('autohide', 'on')
			} else {
				elem.attr('autohide', 'off')
			}
			return false
		})
		.attr('autohide', autohide)
	return panel
}


function makeSubPanel(title, open, parent){
	title = title == null || title.trim() == '' ? '&nbsp;' : title

	var sub_panel = $('<details/>')
		.addClass('sub-panel noScroll')
		.prop('open', open == null ? true : open)
		.append($('<summary>'+title+'</summary>'))
		.append($('<div class="sub-panel-content content"/>'))

	if(parent != null){
		if(parent.hasClass('panel-content')){
			sub_panel.appendTo(parent)
		} else {
			sub_panel.appendTo(parent.find('.panel-content'))
		}
	}

	return sub_panel
}



/**********************************************************************
* vim:set ts=4 sw=4 :                                                */