/*
* jQuery UI Dialog @VERSION
*
* Copyright (c) 2008 Richard D. Worth (rdworth.org)
* Dual licensed under the MIT (MIT-LICENSE.txt)
* and GPL (GPL-LICENSE.txt) licenses.
* 
* http://docs.jquery.com/UI/Dialog
*
* Depends:
*	ui.core.js
*	ui.draggable.js
*	ui.resizable.js
*/
(function($) {

	var setDataSwitch = {
		dragStart: "start.draggable",
		drag: "drag.draggable",
		dragStop: "stop.draggable",
		maxHeight: "maxHeight.resizable",
		minHeight: "minHeight.resizable",
		maxWidth: "maxWidth.resizable",
		minWidth: "minWidth.resizable",
		resizeStart: "start.resizable",
		resize: "drag.resizable",
		resizeStop: "stop.resizable"
	};

	$.widget("ui.dialog", {
		_init: function() {
			this.originalTitle = this.element.attr('title');
			this.options.title = this.options.title || this.originalTitle;

			var parent = $('form:first')[0];
			if (!parent) parent = document.body;

			var self = this,
			options = this.options,

			uiDialogContent = this.element
				.removeAttr('title')
				.addClass('ui-dialog-content')
				.wrap('<div/>')
				.wrap('<div/>'),

			uiDialogContainer = (this.uiDialogContainer = uiDialogContent.parent())
				.addClass('ui-dialog-container')
				.css({
					position: 'relative',
					width: '100%',
					height: '100%'
				}),

			uiDialogTitlebar = (this.uiDialogTitlebar = $('<div/>'))
				.addClass('ui-dialog-titlebar')
				.append('<span class="ui-dialog-titlebar-spinner"></span>')
				.append('<a href="#" class="ui-dialog-titlebar-close"><span>X</span></a>')
				.prependTo(uiDialogContainer)
				.width(this.options.width),

			title = options.title || '&nbsp;',
			titleId = $.ui.dialog.getTitleId(this.element),
			uiDialogTitle = $('<span/>')
				.addClass('ui-dialog-title')
				.attr('id', titleId)
				.html(title)
				.prependTo(uiDialogTitlebar),

			uiDialog = (this.uiDialog = uiDialogContainer.parent())
				.appendTo(parent)
				.hide()
				.addClass('ui-dialog')
				.addClass(options.dialogClass)
			// add content classes to dialog
			// to inherit theme at top level of element
				.addClass(uiDialogContent.attr('className'))
					.removeClass('ui-dialog-content')
				.css({
					position: 'absolute',
					overflow: 'hidden',
					zIndex: options.zIndex,
					width: options.width + 25
				})
			// setting tabIndex makes the div focusable
			// setting outline to 0 prevents a border on focus in Mozilla
				.attr('tabIndex', -1).css('outline', 0).keydown(function(ev) {
					(options.closeOnEscape && ev.keyCode
						&& ev.keyCode == $.keyCode.ESCAPE && self.close());
				})
				.mousedown(function() {
					self._moveToTop();
				}),

			uiDialogButtonPane = (this.uiDialogButtonPane = $('<div/>'))
				.addClass('ui-dialog-buttonpane')
				.css({
					position: 'absolute',
					bottom: 0
				})
				.appendTo(uiDialog);

			if (options.updatePanel) {
				$create(Sys.UI._UpdateProgress, { "associatedUpdatePanelId": options.updatePanel, "displayAfter": 300, "dynamicLayout": true }, null, null, $('.ui-dialog-titlebar-spinner', uiDialogTitlebar).get(0));
			}
			
			this.uiDialogTitlebarClose = $('.ui-dialog-titlebar-close', uiDialogTitlebar)
			.hover(
				function() {
					$(this).addClass('ui-dialog-titlebar-close-hover');
				},
				function() {
					$(this).removeClass('ui-dialog-titlebar-close-hover');
				}
			)
			.mousedown(function(ev) {
				ev.stopPropagation();
			})
			.click(function() {
				self.close();
				return false;
			});

			(options.showClose) ? this.uiDialogTitlebarClose.show() : this.uiDialogTitlebarClose.hide();

			uiDialogTitlebar.find("*").add(uiDialogTitlebar).each(function() {
				$.ui.disableSelection(this);
			});

			(options.draggable && $.fn.draggable && this._makeDraggable());
			(options.resizable && $.fn.resizable && this._makeResizable());

			this._createButtons(options.buttons);
			this._isOpen = false;

			(options.bgiframe && $.fn.bgiframe && uiDialog.bgiframe());
			(options.autoOpen && this.open());
		},

		destroy: function() {
			(this.overlay && this.overlay.destroy());
			this.uiDialog.hide();
			this.element
			.unbind('.dialog')
			.removeData('dialog')
			.removeClass('ui-dialog-content')
			.hide().appendTo('body');
			this.uiDialog.remove();

			(this.originalTitle && this.element.attr('title', this.originalTitle));
		},

		close: function() {
			if (false === this._trigger('beforeclose', null, { options: this.options })) {
				return;
			}

			(this.overlay && this.overlay.destroy());
			this.uiDialog
			.hide(this.options.hide)
			.unbind('keypress.ui-dialog');

			this._trigger('close', null, { options: this.options });
			$.ui.dialog.overlay.resize();

			this._isOpen = false;
		},

		isOpen: function() {
			return this._isOpen;
		},

		open: function() {
			if (this._isOpen) { return; }

			var parent = $('form:first')[0];
			if (!parent) parent = document.body;

			var self = this;
			this.overlay = this.options.modal ? new $.ui.dialog.overlay(this) : null;
			(this.uiDialog.next().length && this.uiDialog.appendTo(parent));
			this.uiDialog.css({ left: '0px', top: '0px', visibility: 'hidden' });
			// Delay the positioning until the browser's determined the dialog's size.
			window.setTimeout(function() {
				self._position(self.options.position);
				self.uiDialog.css({ visibility: 'visible' });
			}, 10);
			this.uiDialog.show(this.options.show);
			(this.options.autoResize && this._size());
			this._moveToTop(true);

			// prevent tabbing out of modal dialogs
			(this.options.modal && this.uiDialog.bind('keypress.ui-dialog', function(e) {
				if (e.keyCode != $.keyCode.TAB) {
					return;
				}

				var tabbables = $(':tabbable', this),
				first = tabbables.filter(':first')[0],
				last = tabbables.filter(':last')[0];

				if (e.target == last && !e.shiftKey) {
					setTimeout(function() {
						first.focus();
					}, 1);
				} else if (e.target == first && e.shiftKey) {
					setTimeout(function() {
						last.focus();
					}, 1);
				}
			}));

			this.uiDialog.find(':tabbable:first').focus();
			this._trigger('open', null, { options: this.options });
			this._isOpen = true;
		},

		_createButtons: function(buttons) {
			var self = this,
			hasButtons = false,
			uiDialogButtonPane = this.uiDialogButtonPane;

			// remove any existing buttons
			uiDialogButtonPane.empty().hide();

			$.each(buttons, function() { return !(hasButtons = true); });
			if (hasButtons) {
				uiDialogButtonPane.show();
				$.each(buttons, function(name, fn) {
					$('<button type="button"></button>')
					.text(name)
					.click(function() { fn.apply(self.element[0], arguments); })
					.appendTo(uiDialogButtonPane);
				});
			}
		},

		_makeDraggable: function() {
			var self = this,
			options = this.options;

			this.uiDialog.draggable({
				cancel: '.ui-dialog-content',
				helper: options.dragHelper,
				handle: '.ui-dialog-titlebar',
				start: function() {
					self._moveToTop();
					(options.dragStart && options.dragStart.apply(self.element[0], arguments));
				},
				drag: function() {
					(options.drag && options.drag.apply(self.element[0], arguments));
				},
				stop: function() {
					(options.dragStop && options.dragStop.apply(self.element[0], arguments));
					$.ui.dialog.overlay.resize();
				}
			});
		},

		_makeResizable: function(handles) {
			handles = (handles === undefined ? this.options.resizable : handles);
			var self = this,
			options = this.options,
			resizeHandles = typeof handles == 'string'
				? handles
				: 'n,e,s,w,se,sw,ne,nw';

			this.uiDialog.resizable({
				cancel: '.ui-dialog-content',
				helper: options.resizeHelper,
				maxWidth: options.maxWidth,
				maxHeight: options.maxHeight,
				minWidth: options.minWidth,
				minHeight: options.minHeight,
				start: function() {
					(options.resizeStart && options.resizeStart.apply(self.element[0], arguments));
				},
				resize: function() {
					(options.autoResize && self._size.apply(self));
					(options.resize && options.resize.apply(self.element[0], arguments));
				},
				handles: resizeHandles,
				stop: function() {
					(options.autoResize && self._size.apply(self));
					(options.resizeStop && options.resizeStop.apply(self.element[0], arguments));
					$.ui.dialog.overlay.resize();
				}
			});
		},

		// the force parameter allows us to move modal dialogs to their correct
		// position on open
		_moveToTop: function(force) {

			if ((this.options.modal && !force)
			|| (!this.options.stack && !this.options.modal)) {
				return this._trigger('focus', null, { options: this.options });
			}

			var maxZ = this.options.zIndex, options = this.options;
			$('.ui-dialog:visible').each(function() {
				maxZ = Math.max(maxZ, parseInt($(this).css('z-index'), 10) || options.zIndex);
			});
			(this.overlay && this.overlay.$el.css('z-index', ++maxZ));
			this.uiDialog.css('z-index', ++maxZ);

			this._trigger('focus', null, { options: this.options });
		},

		updatePosition: function() {
			this._position(this.options.position);
		},

		_position: function(pos) {
			var wnd = $(window), doc = $(document),
			pTop = doc.scrollTop(), pLeft = doc.scrollLeft(),
			minTop = pTop;

			if ($.inArray(pos, ['center', 'top', 'right', 'bottom', 'left']) >= 0) {
				pos = [
				pos == 'right' || pos == 'left' ? pos : 'center',
				pos == 'top' || pos == 'bottom' ? pos : 'middle'
			];
			}
			if (pos.constructor != Array) {
				pos = ['center', 'middle'];
			}
			if (pos[0].constructor == Number) {
				pLeft += pos[0];
			} else {
				switch (pos[0]) {
					case 'left':
						pLeft += 0;
						break;
					case 'right':
						pLeft += wnd.width() - this.uiDialog.outerWidth();
						break;
					default:
					case 'center':
						pLeft += (wnd.width() - this.uiDialog.outerWidth()) / 2;
				}
			}
			if (pos[1].constructor == Number) {
				pTop += pos[1];
			} else {
				switch (pos[1]) {
					case 'top':
						pTop += 0;
						break;
					case 'bottom':
						pTop += wnd.height() - this.uiDialog.outerHeight();
						break;
					default:
					case 'middle':
						pTop += (wnd.height() - this.uiDialog.outerHeight()) / 2;
				}
			}

			// prevent the dialog from being too high (make sure the titlebar
			// is accessible)
			pTop = Math.max(pTop, minTop);
			this.uiDialog.css({ top: pTop, left: pLeft });
		},

		_setData: function(key, value) {
			(setDataSwitch[key] && this.uiDialog.data(setDataSwitch[key], value));
			switch (key) {
				case "buttons":
					this._createButtons(value);
					break;
				case "draggable":
					(value
					? this._makeDraggable()
					: this.uiDialog.draggable('destroy'));
					break;
				case "height":
					this.uiDialog.height(value);
					break;
				case "position":
					this._position(value);
					break;
				case "resizable":
					var uiDialog = this.uiDialog,
					isResizable = this.uiDialog.is(':data(resizable)');

					// currently resizable, becoming non-resizable
					(isResizable && !value && uiDialog.resizable('destroy'));

					// currently resizable, changing handles
					(isResizable && typeof value == 'string' &&
					uiDialog.resizable('option', 'handles', value));

					// currently non-resizable, becoming resizable
					(isResizable || this._makeResizable(value));

					break;
				case "title":
					$(".ui-dialog-title", this.uiDialogTitlebar).html(value || '&nbsp;');
					break;
				case "width":
					this.uiDialog.width(value);
					break;
			}

			$.widget.prototype._setData.apply(this, arguments);
		},

		_size: function() {
			var container = this.uiDialogContainer,
			titlebar = this.uiDialogTitlebar,
			content = this.element,
			tbMargin = (parseInt(content.css('margin-top'), 10) || 0)
				+ (parseInt(content.css('margin-bottom'), 10) || 0),
			lrMargin = (parseInt(content.css('margin-left'), 10) || 0)
				+ (parseInt(content.css('margin-right'), 10) || 0);
			content.height(container.height() - titlebar.outerHeight() - tbMargin);
			content.width(container.width() - lrMargin);
		}
	});

	$.extend($.ui.dialog, {
		defaults: {
			autoOpen: true,
			autoResize: true,
			bgiframe: false,
			buttons: {},
			closeOnEscape: true,
			draggable: true,
			height: 200,
			minHeight: 100,
			minWidth: 150,
			modal: false,
			overlay: {},
			position: 'center',
			resizable: true,
			stack: true,
			width: 300,
			zIndex: 1000
		},

		getter: 'isOpen',

		uuid: 0,
		getTitleId: function($el) {
			return 'ui-dialog-title-' + ($el.attr('id') || ++this.uuid);
		},

		overlay: function(dialog) {
			this.$el = $.ui.dialog.overlay.create(dialog);
		}
	});

	$.extend($.ui.dialog.overlay, {
		instances: [],
		events: $.map('focus,mousedown,mouseup,keydown,keypress,click'.split(','),
		function(e) { return e + '.dialog-overlay'; }).join(' '),
		create: function(dialog) {
			if (this.instances.length === 0) {
				// prevent use of anchors and inputs
				// we use a setTimeout in case the overlay is created from an
				// event that we're going to be cancelling (see #2804)
				setTimeout(function() {
					$('a, :input').bind($.ui.dialog.overlay.events, function() {
						// allow use of the element if inside a dialog and
						// - there are no modal dialogs
						// - there are modal dialogs, but we are in front of the topmost modal
						var allow = false;
						var $dialog = $(this).parents('.ui-dialog');
						if ($dialog.length) {
							var $overlays = $('.ui-dialog-overlay');
							if ($overlays.length) {
								var maxZ = parseInt($overlays.css('z-index'), 10);
								$overlays.each(function() {
									maxZ = Math.max(maxZ, parseInt($(this).css('z-index'), 10));
								});
								allow = parseInt($dialog.css('z-index'), 10) > maxZ;
							} else {
								allow = true;
							}
						}
						return allow;
					});
				}, 1);

				// allow closing by pressing the escape key
				$(document).bind('keydown.dialog-overlay', function(e) {
					(dialog.options.closeOnEscape && e.keyCode
						&& e.keyCode == $.keyCode.ESCAPE && dialog.close());
				});

				// handle window resize
				$(window).bind('resize.dialog-overlay', $.ui.dialog.overlay.resize);
			}

			var $el = $('<div/>').appendTo(document.body)
			.addClass('ui-dialog-overlay').css($.extend({
				borderWidth: 0, margin: 0, padding: 0,
				position: 'absolute', top: 0, left: 0,
				width: this.width(),
				height: this.height()
			}, dialog.options.overlay));

			(dialog.options.bgiframe && $.fn.bgiframe && $el.bgiframe());

			this.instances.push($el);
			return $el;
		},

		destroy: function($el) {
			this.instances.splice($.inArray(this.instances, $el), 1);

			if (this.instances.length === 0) {
				$('a, :input').add([document, window]).unbind('.dialog-overlay');
			}

			$el.remove();
		},

		height: function() {
			// handle IE 6
			if ($.browser.msie && $.browser.version < 7) {
				var scrollHeight = Math.max(
				document.documentElement.scrollHeight,
				document.body.scrollHeight
			);
				var offsetHeight = Math.max(
				document.documentElement.offsetHeight,
				document.body.offsetHeight
			);

				if (scrollHeight < offsetHeight) {
					return $(window).height() + 'px';
				} else {
					return scrollHeight + 'px';
				}
				// handle Opera
			} else if ($.browser.opera) {
				return Math.max(
				window.innerHeight,
				$(document).height()
			) + 'px';
				// handle "good" browsers
			} else {
				return $(document).height() + 'px';
			}
		},

		width: function() {
			// handle IE 6
			if ($.browser.msie && $.browser.version < 7) {
				var scrollWidth = Math.max(
				document.documentElement.scrollWidth,
				document.body.scrollWidth
			);
				var offsetWidth = Math.max(
				document.documentElement.offsetWidth,
				document.body.offsetWidth
			);

				if (scrollWidth < offsetWidth) {
					return $(window).width() + 'px';
				} else {
					return scrollWidth + 'px';
				}
				// handle Opera
			} else if ($.browser.opera) {
				return Math.max(
				window.innerWidth,
				$(document).width()
			) + 'px';
				// handle "good" browsers
			} else {
				return $(document).width() + 'px';
			}
		},

		resize: function() {
			/* If the dialog is draggable and the user drags it past the
			* right edge of the window, the document becomes wider so we
			* need to stretch the overlay. If the user then drags the
			* dialog back to the left, the document will become narrower,
			* so we need to shrink the overlay to the appropriate size.
			* This is handled by shrinking the overlay before setting it
			* to the full document size.
			*/
			var $overlays = $([]);
			$.each($.ui.dialog.overlay.instances, function() {
				$overlays = $overlays.add(this);
			});

			$overlays.css({
				width: 0,
				height: 0
			}).css({
				width: $.ui.dialog.overlay.width(),
				height: $.ui.dialog.overlay.height()
			});
		}
	});

	$.extend($.ui.dialog.overlay.prototype, {
		destroy: function() {
			$.ui.dialog.overlay.destroy(this.$el);
		}
	});

})(jQuery);