/**
 * Boxen jQuery Plugin
 * 
 * LICENSE
 * 
 * Copyright (c) 2009 Phil Brown (http://morecowbell.net.au/)
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * 
 * @copyright Copyright (c) 2009 Phil Brown (http://morecowbell.net.au/)
 * @license http://www.opensource.org/licenses/mit-license.php The MIT License
 * @version 1.4
 */

( function($) {
	$.fn.extend( {
		boxen : function(url, options) {
			switch (typeof url) {
			case 'object':
				options = url;
				break;
			case 'string':
				options = $.extend( {}, {
					url :url,
					urlAttribute :null
				}, options);
				break;
			}
			return this.click( function(e) {
				$.Boxen.open(this, options);
				return false;
			});
		}
	});
	$.Boxen = {
		defaults : {
			urlParams : {},
			showTitleBar :true,
			showCloseButton :true,
			title :null,
			titleAttribute :'title',
			closeButtonText :null,
			width :600,
			height :500,
			url :null,
			urlAttribute :'href',
			overlayOpacity :0.8,
			overlayColor :null,
			modal :false,
			postOpen : function(contentAreaElement) {
			},
			postClose : function() {
			}
		},
		bigIFrame :null,
		overlay :null,
		container :null,
		options :null,
		titleBar :null,
		closeButton :null,
		contentWindow :null,
		contentArea :null,
		ie6 :false,
		setOptions : function(options) {
			this.options = $.extend( {}, this.defaults, options || {});
			return this;
		},
		getFullUrl : function() {
			var url = this.options.url;
			url += url.indexOf('?') == -1 ? '?' : '&';
			return url += $.param(this.options.urlParams);
		},
		init : function() {
			_this = this;
			this.isIE6 = $.browser.msie && parseInt($.browser.version) < 7;
			if ($.browser.opera) {
				$.support.opacity = true;
			}
			$('#boxen_overlay, #boxen_container').remove();
			this.overlay = $('<div>').attr('id', 'boxen_overlay').css( {
				opacity :this.options.overlayOpacity,
				backgroundColor :this.options.overlayColor,
				display :'none',
				position :'absolute',
				top :0,
				left :0,
				zIndex :10000
			});
			if (!this.options.modal) {
				this.overlay.click( function(e) {
					$.Boxen.close();
					return false;
				});
			}
			this.container = $('<div>').attr('id', 'boxen_container').width(
					this.options.width).height(this.options.height).css( {
				position :'absolute',
				left :'50%',
				top :'50%',
				marginLeft :Math.round(this.options.width / -2) + 'px',
				marginTop :Math.round(this.options.height / -2) + 'px',
				display :'none',
				zIndex :10001
			});
			if (this.isIE6) {
				this.bigIFrame = $('<iframe>').attr('id', 'boxen_big_iframe')
						.css( {
							zIndex :9999,
							position :'absolute',
							top :0,
							left :0,
							opacity :0
						}).appendTo('body');
				this._sizeOverlay();
				this._centreContent();
				$(window).bind('scroll.Boxen', function(e) {
					_this._centreContent();
				}).bind('resize.Boxen', function(e) {
					_this._sizeOverlay();
					_this._centreContent();
				});
			} else {
				this.overlay.css( {
					position :'fixed',
					width :'100%',
					height :'100%'
				});
				this.container.css('position', 'fixed');
			}
			this.overlay.appendTo('body');
			this.container.appendTo('body');
			this.contentWindow = $('<div>').attr('id', 'boxen_content')
					.appendTo(this.container);
			if (this.options.showTitleBar) {
				this.titleBar = $('<div>').attr('id', 'boxen_titlebar').append(
						$('<span>').attr('id', 'boxen_title').html(
								this.options.title)).appendTo(
						this.contentWindow);
			} else {
				this.titleBar = null;
			}
			if (this.options.showCloseButton) {
				this.closeButton = $('<a>').attr( {
					href :'#',
					id :'boxen_close_button'
				}).click( function(e) {
					$.Boxen.close();
					return false;
				}).appendTo(this.contentWindow);
				if (this.options.closeButtonText) {
					this.closeButton.append($('<span>').html(
							this.options.closeButtonText));
				}
			} else {
				this.closeButton = null;
			}
			this.contentArea = $('<div>').attr('id', 'boxen_content_area')
					.appendTo(this.contentWindow);
			return this;
		},
		show : function(callback) {
			this.overlay.fadeIn('fast');
			this.container.fadeIn('fast', function() {
				var _this = $.Boxen;
				if (null !== _this.options.url) {
					var iFrame = $('<iframe>').attr( {
						id :'boxen_iframe_content_' + new Date().getTime(),
						width :_this.getContentAreaWidth(),
						height :_this.getContentAreaHeight(),
						frameBorder :0,
						src :_this.getFullUrl()
					}).appendTo(_this.contentArea);
				} else {
					_this.contentArea.width(_this.getContentAreaWidth())
							.height(_this.getContentAreaHeight());
				}
				_this.options.postOpen(_this.getContentAreaElement());
			});
			return this;
		},
		close : function() {
			try {
				if (this.isIE6) {
					$(window).unbind('scroll.Boxen').unbind('resize.Boxen');
					throw 'IE6';
				}
				this.container.fadeOut('fast', function() {
					$(this).remove();
				});
				this.overlay.fadeOut('fast', function() {
					$(this).remove();
				});
			} catch (e) {
				$('#boxen_big_iframe, #boxen_overlay, #boxen_container')
						.remove();
			}
			this.options.postClose();
			return this;
		},
		open : function(domElement, options) {
			this.setOptions(options);
			if (domElement) {
				this.options.title = this.options.titleAttribute
						&& $(domElement).attr(this.options.titleAttribute)
						|| this.options.title;
				this.options.url = this.options.urlAttribute
						&& $(domElement).attr(this.options.urlAttribute)
						|| this.options.url;
			}
			this.init().show();
			return this;
		},
		_centreContent : function() {
			if (this.options.height < $(window).height()) {
				var topMargin = Math.round(this.options.height / -2)
						+ $(document).scrollTop();
				this.container.css( {
					marginTop :topMargin + 'px'
				});
			}
		},
		_sizeOverlay : function() {
			this.bigIFrame.css( {
				width :($(document).width() - 21) + 'px',
				height :($(document).height() - 4) + 'px'
			});
			this.overlay.css( {
				width :($(document).width() - 21) + 'px',
				height :($(document).height() - 4) + 'px'
			});
		},
		getContentAreaElement : function() {
			return this.contentArea.get(0);
		},
		getContentAreaHeight : function() {
			return this.titleBar ? this.options.height
					- this.titleBar.outerHeight() : this.options.height;
		},
		getContentAreaWidth : function() {
			return this.options.width;
		}
	};
})(jQuery);