/*
 * jQuery Address Plugin v1.4
 * http://www.asual.com/jquery/address/
 *
 * Copyright (c) 2009-2010 Rostislav Hristov
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * Date: 2011-05-04 14:22:12 +0300 (Wed, 04 May 2011)
 */
(function ($) {

	$.address = (function () {

		var _trigger = function (name) {
			$($.address).trigger(
                    $.extend($.Event(name),
                        (function () {
                        	var parameters = {},
                                parameterNames = $.address.parameterNames();
                        	for (var i = 0, l = parameterNames.length; i < l; i++) {
                        		parameters[parameterNames[i]] = $.address.parameter(parameterNames[i]);
                        	}
                        	return {
                        		value: $.address.value(),
                        		path: $.address.path(),
                        		pathNames: $.address.pathNames(),
                        		parameterNames: parameterNames,
                        		parameters: parameters,
                        		queryString: $.address.queryString()
                        	};
                        }).call($.address)
                    )
                );
		},
            _bind = function (value, data, fn) {
            	$().bind.apply($($.address), Array.prototype.slice.call(arguments));
            	return $.address;
            },
            _supportsState = function () {
            	return (_h.pushState && _opts.state !== UNDEFINED);
            },
            _hrefState = function () {
            	return ('/' + _l.pathname.replace(new RegExp(_opts.state), '') +
                    _l.search + (_hrefHash() ? '#' + _hrefHash() : '')).replace(_re, '/');
            },
            _hrefHash = function () {
            	var index = _l.href.indexOf('#');
            	return index != -1 ? _crawl(_l.href.substr(index + 1), FALSE) : '';
            },
            _href = function () {
            	return _supportsState() ? _hrefState() : _hrefHash();
            },
            _window = function () {
            	try {
            		return top.document !== UNDEFINED ? top : window;
            	} catch (e) {
            		return window;
            	}
            },
            _js = function () {
            	return 'javascript';
            },
            _strict = function (value) {
            	value = value.toString();
            	return (_opts.strict && value.substr(0, 1) != '/' ? '/' : '') + value;
            },
            _crawl = function (value, direction) {
            	if (_opts.crawlable && direction) {
            		return (value !== '' ? '!' : '') + value;
            	}
            	return value.replace(/^\!/, '');
            },
            _cssint = function (el, value) {
            	return parseInt(el.css(value), 10);
            },
            _search = function (el) {
            	var url, s;
            	for (var i = 0, l = el.childNodes.length; i < l; i++) {
            		try {
            			if ('src' in el.childNodes[i] && el.childNodes[i].src) {
            				url = String(el.childNodes[i].src);
            			}
            		} catch (e) {
            			// IE Invalid pointer problem with base64 encoded images
            		}
            		s = _search(el.childNodes[i]);
            		if (s) {
            			url = s;
            		}
            	}
            	return url;
            },
            _listen = function () {
            	if (!_silent) {
            		var hash = _href(),
                        diff = _value != hash;
            		if (diff) {
            			if (_msie && _version < 7) {
            				_l.reload();
            			} else {
            				if (_msie && _version < 8 && _opts.history) {
            					_st(_html, 50);
            				}
            				_value = hash;
            				_update(FALSE);
            			}
            		}
            	}
            },
            _update = function (internal) {
            	_trigger(CHANGE);
            	_trigger(internal ? INTERNAL_CHANGE : EXTERNAL_CHANGE);
            	_st(_track, 10);
            },
            _track = function () {
            	if (_opts.trackFirst != true) {
            		_opts.trackFirst = true;
            		return;
            	}
            	if (_opts.tracker !== 'null' && _opts.tracker !== null) {
            		var fn = $.isFunction(_opts.tracker) ? _opts.tracker : _t[_opts.tracker],
                        value = (_l.pathname + _l.search +
                                ($.address && !_supportsState() ? $.address.value() : ''))
                                .replace(/\/\//, '/').replace(/^\/$/, '');
            		if ($.isFunction(fn)) {
            			fn(value);
            		} else if ($.isFunction(_t.urchinTracker)) {
            			_t.urchinTracker(value);
            		} else if (_t.pageTracker !== UNDEFINED && $.isFunction(_t.pageTracker._trackPageview)) {
            			_t.pageTracker._trackPageview(value);
            		} else if (_t._gaq !== UNDEFINED && $.isFunction(_t._gaq.push)) {
            			_t._gaq.push(['_trackPageview', decodeURI(value)]);
            		}
            	}
            },
            _html = function () {
            	var src = _js() + ':' + FALSE + ';document.open();document.writeln(\'<html><head><title>' +
                    _d.title.replace('\'', '\\\'') + '</title><script>var ' + ID + ' = "' + encodeURIComponent(_href()) +
                    (_d.domain != _l.hostname ? '";document.domain="' + _d.domain : '') +
                    '";</' + 'script></head></html>\');document.close();';
            	if (_version < 7) {
            		_frame.src = src;
            	} else {
            		_frame.contentWindow.location.replace(src);
            	}
            },
            _options = function () {
            	if (_url && _qi != -1) {
            		var param, params = _url.substr(_qi + 1).split('&');
            		for (i = 0; i < params.length; i++) {
            			param = params[i].split('=');
            			if (/^(autoUpdate|crawlable|history|strict|wrap)$/.test(param[0])) {
            				_opts[param[0]] = (isNaN(param[1]) ? /^(true|yes)$/i.test(param[1]) : (parseInt(param[1], 10) !== 0));
            			}
            			if (/^(state|tracker)$/.test(param[0])) {
            				_opts[param[0]] = param[1];
            			}
            		}
            		_url = null;
            	}
            	_value = _href();
            },
            _load = function () {
            	if (!_loaded) {
            		_loaded = TRUE;
            		_options();
            		var complete = function () {
            			_enable.call(this);
            			_unescape.call(this);
            		},
                        body = $('body').ajaxComplete(complete);
            		complete();
            		if (_opts.wrap) {
            			var wrap = $('body > *')
                            .wrapAll('<div style="padding:' +
                                (_cssint(body, 'marginTop') + _cssint(body, 'paddingTop')) + 'px ' +
                                (_cssint(body, 'marginRight') + _cssint(body, 'paddingRight')) + 'px ' +
                                (_cssint(body, 'marginBottom') + _cssint(body, 'paddingBottom')) + 'px ' +
                                (_cssint(body, 'marginLeft') + _cssint(body, 'paddingLeft')) + 'px;" />')
                            .parent()
                            .wrap('<div id="' + ID + '" style="height:100%;overflow:auto;position:relative;' +
                                (_webkit && !window.statusbar.visible ? 'resize:both;' : '') + '" />');
            			$('html, body')
                            .css({
                            	height: '100%',
                            	margin: 0,
                            	padding: 0,
                            	overflow: 'hidden'
                            });
            			if (_webkit) {
            				$('<style type="text/css" />')
                                .appendTo('head')
                                .text('#' + ID + '::-webkit-resizer { background-color: #fff; }');
            			}
            		}
            		if (_msie && _version < 8) {
            			var frameset = _d.getElementsByTagName('frameset')[0];
            			_frame = _d.createElement((frameset ? '' : 'i') + 'frame');
            			if (frameset) {
            				frameset.insertAdjacentElement('beforeEnd', _frame);
            				frameset[frameset.cols ? 'cols' : 'rows'] += ',0';
            				_frame.noResize = TRUE;
            				_frame.frameBorder = _frame.frameSpacing = 0;
            			} else {
            				_frame.style.display = 'none';
            				_frame.style.width = _frame.style.height = 0;
            				_frame.tabIndex = -1;
            				_d.body.insertAdjacentElement('afterBegin', _frame);
            			}
            			_st(function () {
            				$(_frame).bind('load', function () {
            					var win = _frame.contentWindow;
            					_value = win[ID] !== UNDEFINED ? win[ID] : '';
            					if (_value != _href()) {
            						_update(FALSE);
            						_l.hash = _crawl(_value, TRUE);
            					}
            				});
            				if (_frame.contentWindow[ID] === UNDEFINED) {
            					_html();
            				}
            			}, 50);
            		}

            		_st(function () {
            			_trigger('init');
            			_update(FALSE);
            		}, 1);

            		if (!_supportsState()) {
            			if ((_msie && _version > 7) || (!_msie && ('on' + HASH_CHANGE) in _t)) {
            				if (_t.addEventListener) {
            					_t.addEventListener(HASH_CHANGE, _listen, FALSE);
            				} else if (_t.attachEvent) {
            					_t.attachEvent('on' + HASH_CHANGE, _listen);
            				}
            			} else {
            				_si(_listen, 50);
            			}
            		}
            	}
            },
            _enable = function () {
            	var el,
                    elements = $('a'),
                    length = elements.size(),
                    delay = 1,
                    index = -1,
                    fn = function () {
                    	if (++index != length) {
                    		el = $(elements.get(index));
                    		if (el.is('[rel*="address:"]')) {
                    			el.address();
                    		}
                    		_st(fn, delay);
                    	}
                    };
            	_st(fn, delay);
            },
            _popstate = function () {
            	if (_value != _href()) {
            		_value = _href();
            		_update(FALSE);
            	}
            },
            _unload = function () {
            	if (_t.removeEventListener) {
            		_t.removeEventListener(HASH_CHANGE, _listen, FALSE);
            	} else if (_t.detachEvent) {
            		_t.detachEvent('on' + HASH_CHANGE, _listen);
            	}
            },
            _unescape = function () {
            	if (_opts.crawlable) {
            		var base = _l.pathname.replace(/\/$/, ''),
                        fragment = '_escaped_fragment_';
            		if ($('body').html().indexOf(fragment) != -1) {
            			$('a[href]:not([href^=http]), a[href*="' + document.domain + '"]').each(function () {
            				var href = $(this).attr('href').replace(/^http:/, '').replace(new RegExp(base + '/?$'), '');
            				if (href === '' || href.indexOf(fragment) != -1) {
            					$(this).attr('href', '#' + href.replace(new RegExp('/(.*)\\?' + fragment + '=(.*)$'), '!$2'));
            				}
            			});
            		}
            	}
            },
            UNDEFINED,
            ID = 'jQueryAddress',
            STRING = 'string',
            HASH_CHANGE = 'hashchange',
            INIT = 'init',
            CHANGE = 'change',
            INTERNAL_CHANGE = 'internalChange',
            EXTERNAL_CHANGE = 'externalChange',
            TRUE = true,
            FALSE = false,
            _opts = {
            	autoUpdate: TRUE,
            	crawlable: FALSE,
            	history: TRUE,
            	strict: TRUE,
            	wrap: FALSE
            },
            _browser = $.browser,
            _version = parseFloat($.browser.version),
            _mozilla = _browser.mozilla,
            _msie = _browser.msie,
            _opera = _browser.opera,
            _webkit = _browser.webkit || _browser.safari,
            _supported = FALSE,
            _t = _window(),
            _d = _t.document,
            _h = _t.history,
            _l = _t.location,
            _si = setInterval,
            _st = setTimeout,
            _re = /\/{2,9}/g,
            _agent = navigator.userAgent,
            _frame,
            _form,
            _url = _search(document),
            _qi = _url ? _url.indexOf('?') : -1,
            _title = _d.title,
            _silent = FALSE,
            _loaded = FALSE,
            _justset = TRUE,
            _juststart = TRUE,
            _updating = FALSE,
            _listeners = {},
            _value = _href();

		if (_msie) {
			_version = parseFloat(_agent.substr(_agent.indexOf('MSIE') + 4));
			if (_d.documentMode && _d.documentMode != _version) {
				_version = _d.documentMode != 8 ? 7 : 8;
			}
			var pc = _d.onpropertychange;
			_d.onpropertychange = function () {
				if (pc) {
					pc.call(_d);
				}
				if (_d.title != _title && _d.title.indexOf('#' + _href()) != -1) {
					_d.title = _title;
				}
			};
		}

		_supported =
            (_mozilla && _version >= 1) ||
            (_msie && _version >= 6) ||
            (_opera && _version >= 9.5) ||
            (_webkit && _version >= 523);

		if (_supported) {
			if (_opera) {
				history.navigationMode = 'compatible';
			}
			if (document.readyState == 'complete') {
				var interval = setInterval(function () {
					if ($.address) {
						_load();
						clearInterval(interval);
					}
				}, 50);
			} else {
				_options();
				$(_load);
			}
			$(window).bind('popstate', _popstate).bind('unload', _unload);
		} else if (!_supported && _hrefHash() !== '') {
			_l.replace(_l.href.substr(0, _l.href.indexOf('#')));
		} else {
			_track();
		}

		return {
			bind: function (type, data, fn) {
				return _bind(type, data, fn);
			},
			init: function (fn) {
				return _bind(INIT, fn);
			},
			change: function (fn) {
				return _bind(CHANGE, fn);
			},
			internalChange: function (fn) {
				return _bind(INTERNAL_CHANGE, fn);
			},
			externalChange: function (fn) {
				return _bind(EXTERNAL_CHANGE, fn);
			},
			baseURL: function () {
				var url = _l.href;
				if (url.indexOf('#') != -1) {
					url = url.substr(0, url.indexOf('#'));
				}
				if (/\/$/.test(url)) {
					url = url.substr(0, url.length - 1);
				}
				return url;
			},
			autoUpdate: function (value) {
				if (value !== UNDEFINED) {
					_opts.autoUpdate = value;
					return this;
				}
				return _opts.autoUpdate;
			},
			crawlable: function (value) {
				if (value !== UNDEFINED) {
					_opts.crawlable = value;
					return this;
				}
				return _opts.crawlable;
			},
			history: function (value) {
				if (value !== UNDEFINED) {
					_opts.history = value;
					return this;
				}
				return _opts.history;
			},
			state: function (value) {
				if (value !== UNDEFINED) {
					_opts.state = value;
					var hrefState = _hrefState();
					if (_opts.state !== UNDEFINED) {
						if (_h.pushState) {
							if (hrefState.substr(0, 3) == '/#/') {
								_l.replace(_opts.state.replace(/^\/$/, '') + hrefState.substr(2));
							}
						} else if (hrefState != '/' && hrefState.replace(/^\/#/, '') != _hrefHash()) {
							_st(function () {
								_l.replace(_opts.state.replace(/^\/$/, '') + '/#' + hrefState);
							}, 1);
						}
					}
					return this;
				}
				return _opts.state;
			},
			strict: function (value) {
				if (value !== UNDEFINED) {
					_opts.strict = value;
					return this;
				}
				return _opts.strict;
			},
			tracker: function (value) {
				if (value !== UNDEFINED) {
					_opts.tracker = value;
					return this;
				}
				return _opts.tracker;
			},
			wrap: function (value) {
				if (value !== UNDEFINED) {
					_opts.wrap = value;
					return this;
				}
				return _opts.wrap;
			},
			update: function () {
				_updating = TRUE;
				this.value(_value);
				_updating = FALSE;
				return this;
			},
			title: function (value) {
				if (value !== UNDEFINED) {
					_st(function () {
						_title = _d.title = value;
						if (_juststart && _frame && _frame.contentWindow && _frame.contentWindow.document) {
							_frame.contentWindow.document.title = value;
							_juststart = FALSE;
						}
						if (!_justset && _mozilla) {
							_l.replace(_l.href.indexOf('#') != -1 ? _l.href : _l.href + '#');
						}
						_justset = FALSE;
					}, 50);
					return this;
				}
				return _d.title;
			},
			value: function (value) {
				if (value !== UNDEFINED) {
					value = _strict(value);
					if (value == '/') {
						value = '';
					}
					if (_value == value && !_updating) {
						return;
					}
					_justset = TRUE;
					_value = value;
					if (_opts.autoUpdate || _updating) {
						_update(TRUE);
						if (_supportsState()) {
							_h[_opts.history ? 'pushState' : 'replaceState']({}, '',
                                    _opts.state.replace(/\/$/, '') + (_value === '' ? '/' : _value));
						} else {
							_silent = TRUE;
							if (_webkit) {
								if (_opts.history) {
									_l.hash = '#' + _crawl(_value, TRUE);
								} else {
									_l.replace('#' + _crawl(_value, TRUE));
								}
							} else if (_value != _href()) {
								if (_opts.history) {
									_l.hash = '#' + _crawl(_value, TRUE);
								} else {
									_l.replace('#' + _crawl(_value, TRUE));
								}
							}
							if ((_msie && _version < 8) && _opts.history) {
								_st(_html, 50);
							}
							if (_webkit) {
								_st(function () { _silent = FALSE; }, 1);
							} else {
								_silent = FALSE;
							}
						}
					}
					return this;
				}
				if (!_supported) {
					return null;
				}
				return _strict(_value);
			},
			path: function (value) {
				if (value !== UNDEFINED) {
					var qs = this.queryString(),
                        hash = this.hash();
					this.value(value + (qs ? '?' + qs : '') + (hash ? '#' + hash : ''));
					return this;
				}
				return _strict(_value).split('#')[0].split('?')[0];
			},
			pathNames: function () {
				var path = this.path(),
                    names = path.replace(_re, '/').split('/');
				if (path.substr(0, 1) == '/' || path.length === 0) {
					names.splice(0, 1);
				}
				if (path.substr(path.length - 1, 1) == '/') {
					names.splice(names.length - 1, 1);
				}
				return names;
			},
			queryString: function (value) {
				if (value !== UNDEFINED) {
					var hash = this.hash();
					this.value(this.path() + (value ? '?' + value : '') + (hash ? '#' + hash : ''));
					return this;
				}
				var arr = _value.split('?');
				return arr.slice(1, arr.length).join('?').split('#')[0];
			},
			parameter: function (name, value, append) {
				var i, params;
				if (value !== UNDEFINED) {
					var names = this.parameterNames();
					params = [];
					value = value ? value.toString() : '';
					for (i = 0; i < names.length; i++) {
						var n = names[i],
                            v = this.parameter(n);
						if (typeof v == STRING) {
							v = [v];
						}
						if (n == name) {
							v = (value === null || value === '') ? [] :
                                (append ? v.concat([value]) : [value]);
						}
						for (var j = 0; j < v.length; j++) {
							params.push(n + '=' + v[j]);
						}
					}
					if ($.inArray(name, names) == -1 && value !== null && value !== '') {
						params.push(name + '=' + value);
					}
					this.queryString(params.join('&'));
					return this;
				}
				value = this.queryString();
				if (value) {
					var r = [];
					params = value.split('&');
					for (i = 0; i < params.length; i++) {
						var p = params[i].split('=');
						if (p[0] == name) {
							r.push(p.slice(1).join('='));
						}
					}
					if (r.length !== 0) {
						return r.length != 1 ? r : r[0];
					}
				}
			},
			parameterNames: function () {
				var qs = this.queryString(),
                    names = [];
				if (qs && qs.indexOf('=') != -1) {
					var params = qs.split('&');
					for (var i = 0; i < params.length; i++) {
						var name = params[i].split('=')[0];
						if ($.inArray(name, names) == -1) {
							names.push(name);
						}
					}
				}
				return names;
			},
			hash: function (value) {
				if (value !== UNDEFINED) {
					this.value(_value.split('#')[0] + (value ? '#' + value : ''));
					return this;
				}
				var arr = _value.split('#');
				return arr.slice(1, arr.length).join('#');
			}
		};
	})();

	$.fn.address = function (fn) {
		if (!$(this).attr('address')) {
			var f = function (e) {
				if (e.shiftKey || e.ctrlKey || e.metaKey) {
					return true;
				}
				if ($(this).is('a')) {
					var value = fn ? fn.call(this) :
                        /address:/.test($(this).attr('rel')) ? $(this).attr('rel').split('address:')[1].split(' ')[0] :
                        $.address.state() !== undefined && $.address.state() != '/' ?
                                $(this).attr('href').replace(new RegExp('^(.*' + $.address.state() + '|\\.)'), '') :
                                $(this).attr('href').replace(/^(#\!?|\.)/, '');
					$.address.value(value);
					e.preventDefault();
				}
			};
			$(this).click(f).live('click', f).live('submit', function (e) {
				if ($(this).is('form')) {
					var action = $(this).attr('action'),
                        value = fn ? fn.call(this) : (action.indexOf('?') != -1 ? action.replace(/&$/, '') : action + '?') +
                            $(this).serialize();
					$.address.value(value);
					e.preventDefault();
				}
			}).attr('address', true);
		}
		return this;
	};

})(jQuery);