/*
 * jQuery UI Dialog @VERSION
 *
 * Copyright (c) 2008 AUTHORS.txt (http://ui.jquery.com/about)
 * 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 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')
				.mousedown(function() {
					self.moveToTop();
				})
				.prependTo(uiDialogContainer),

			uiDialogTitlebarClose = $('<a href="#"/>')
				.addClass('ui-dialog-titlebar-close')
				.attr('role', 'button')
				.appendTo(uiDialogTitlebar),

			uiDialogTitlebarCloseText = (this.uiDialogTitlebarCloseText = $('<span/>'))
				.html('X')
				.appendTo(uiDialogTitlebarClose),

			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(document.body)
				.hide()
				.addClass('ui-dialog')
				.addClass(options.dialogClass)
				.css({
					position: 'absolute',
					width: options.width,
					height: options.height,
					overflow: 'hidden',
					zIndex: options.zIndex
				})
				// 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());
				})
				.attr({
					role: 'dialog',
					'aria-labelledby': titleId
				})
				.mouseup(function() {
					self.moveToTop();
				}),

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

			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;
				});

		uiDialogTitlebar.find("*").add(uiDialogTitlebar).disableSelection();

		(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;
	},

	// 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));

		//Save and then restore scroll since Opera 9.5+ resets when parent z-Index is changed.
		//  http://ui.jquery.com/bugs/ticket/3193
		var saveScroll = { scrollTop: this.element.attr('scrollTop'), scrollLeft: this.element.attr('scrollLeft') };
		this.uiDialog.css('z-index', ++maxZ);
		this.element.attr(saveScroll);
		this._trigger('focus', null, { options: this.options });
	},

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

		this.overlay = this.options.modal ? new $.ui.dialog.overlay(this) : null;
		(this.uiDialog.next().length && this.uiDialog.appendTo('body'));
		this._position(this.options.position);
		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(event) {
			if (event.keyCode != $.keyCode.TAB) {
				return;
			}

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

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

	_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.width();
					break;
				default:
				case 'center':
					pLeft += (wnd.width() - this.uiDialog.width()) / 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.height();
					break;
				default:
				case 'middle':
					pTop += (wnd.height() - this.uiDialog.height()) / 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, {
	version: "@VERSION",
	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(event) { return event + '.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(event) {
				(dialog.options.closeOnEscape && event.keyCode
						&& event.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);