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/*!
* Modified by yswang(wangys0927@gmail.com) at:
* 2014/12/31 -> 0.8.5 Supported legacy IE(6,7).
* 2015/01/04 -> 0.8.6 Upgrade route path parser.
* 2015/01/16 -> 0.9 Use new route path parser, now it's powerful!
* All supported route rules:
* /users // Static rule: Path.map('/users')
* /users/:id // Named route parameter: Path.map('/users/:id')
* // --> this.params['id']
* /users/:id(\\d+) // Parameter muse be digits: Path.map('/users/:id(\\d+)')
* // --> this.params['id']
* /users/:id? // Parameter is optional: Path.map('/users/:id?')
* // --> this.params['id'] || 'undefined'
* /users/:id/:action // Path.map('/users/:id/:action')
* // --> this.params['id'], this.params['action']
* /users/(\\d+) // Regexp route parameter: Path.map('/users/(\\d+)')
* // --> this.params[0]
* /users/(\\d+)/(\\w+) // Path.map('/users/(\\d+)/(\\w+)')
* // --> this.params[0], this.params[1]
* /users/:id/(\\w+) // Named parameter and regexp parameter mixed use: Path.map('/users/:id/(\\w+)')
* // --> this.params['id'], this.params[0]
* /users/* // Wildcard parameter: Path.map('/users/*')
* // --> this.params[0] || 'undefined'
* ['/A', '/B', '/C'] // Array multi route, can matched any one given: Path.map(['/A', '/B', '/C'])
* /^#\/comments\/(\d+)$/ // Regexp route: Path.map(/^#\/comments\/(\d+)$/)
*
* Other:
* /users_:id_:action // /users_2_edit
* /get.:id..comments\\?p=:page(\\d+) // get.1202..comments?page=1
* /... as define yourself...
*/
;(function(window) {
var Path = {
'version': "0.9",
'map': function (path) {
var str_path = Path._pathToString(path);
if(Path.routes.defined.hasOwnProperty(str_path)) {
return Path.routes.defined[str_path];
} else {
return new Path.core.route(path);
}
},
'root': function (path) {
Path.routes.root = path;
},
'rescue': function (fn) {
Path.routes.rescue = fn;
},
'history': {
'initial':{}, // Empty container for "Initial Popstate" checking variables.
'pushState': function(state, title, path){
if(Path.history.supported){
if(Path.dispatch(path)){
window.history.pushState(state, title, path);
}
} else {
if(Path.history.fallback){
window.location.hash = "#" + path;
}
}
},
'popState': function(event){
var initialPop = !Path.history.initial.popped && window.location.href == Path.history.initial.URL;
Path.history.initial.popped = true;
if(initialPop) {
return;
}
Path.dispatch(document.location.pathname);
},
'listen': function(fallback){
Path.history.supported = !!(window.history && window.history.pushState);
Path.history.fallback = fallback;
if(Path.history.supported){
Path.history.initial.popped = ('state' in window.history);
Path.history.initial.URL = window.location.href;
window.onpopstate = Path.history.popState;
} else {
if(Path.history.fallback){
for(route in Path.routes.defined){
if(route.charAt(0) != "#"){
Path.routes.defined["#"+route] = Path.routes.defined[route];
Path.routes.defined["#"+route].path = "#"+route;
}
}
Path.listen();
}
}
}
},
'match': function (path, parameterize) {
var route = null;
for (var _dpath in Path.routes.defined) {
route = Path.routes.defined[_dpath];
if(route && route.match(path, parameterize)) {
return route;
}
}
return null;
},
'dispatch': function (passed_route) {
var previous_route, matched_route;
if (Path.routes.current !== passed_route) {
Path.routes.previous = Path.routes.current;
Path.routes.current = passed_route;
matched_route = Path.match(passed_route, true);
if (Path.routes.previous) {
previous_route = Path.match(Path.routes.previous);
if (previous_route !== null && typeof previous_route.do_exit === 'function') {
previous_route.do_exit();
}
}
if (matched_route !== null) {
matched_route.run();
return true;
} else {
if (Path.routes.rescue !== null) {
Path.routes.rescue();
}
}
}
},
'listen': function () {
// yswang add to hack legacy IE(6,7)
Path._hackLegacyIE();
var fn = function() {Path.dispatch(window.location.hash);};
if(window.location.hash === "") {
if (Path.routes.root !== null) {
window.location.hash = Path.routes.root;
}
}
// The 'document.documentMode' checks below ensure that PathJS fires the right events
// even in IE "Quirks Mode".
if ("onhashchange" in window && (!document.documentMode || document.documentMode >= 8)) {
window.onhashchange = fn;
} else {
setInterval(fn, 50);
}
if(window.location.hash !== "") {
Path.dispatch(window.location.hash);
}
},
'core': {
'route': function (path) {
this.path = Path._pathToString(path);
// yswang
this.pathKeys = [];
this.pathRegExp = Path._pathRegExp(path, this.pathKeys, false, false);
this.action = null;
this.do_enter = [];
this.do_exit = null;
this.params = {};
Path.routes.defined[Path._pathToString(path)] = this;
}
},
'routes': {
'current': null,
'root': null,
'rescue': null,
'previous': null,
'defined': {}
},
// yswang add to support complex path route
'_pathToString': function(path) {
if(Object.prototype.toString.call(path) === '[object Array]') {
return '[' + path.join(',') + ']';
}
return path.toString();
},
'_pathRegExp': function(path, keys, sensitive, strict) {
if (Object.prototype.toString.call(path) === '[object RegExp]') {
return path;
}
if (Object.prototype.toString.call(path) === '[object Array]') {
path = '(' + path.join('|') + ')';
}
var _keys = [];
path = path
.concat(strict ? '' : '/?')
// -- comment this to support path eg: /user/(\\d+)
//.replace(/\/\(/g, '(?:/')
.replace(/(\/)?(\.)?:(\w+)(?:(\(.*?\)))?(\?)?(\*)?/g, function(_, slash, format, key, capture, optional, star) {
_keys.push({'name': key, 'optional': !! optional});
slash = slash || '';
return ''
+ (optional ? '' : slash)
+ '(?:'
+ (optional ? slash : '')
+ (format || '') + (capture || (format && '([^/.]+?)' || '([^/]+?)')) + ')'
+ (optional || '')
+ (star ? '(/*)?' : '');
})
.replace(/([\/.])/g, '\\$1')
.replace(/\*/g, '(.*)');
// ----- important：reset index position of saved keys -----
if(Object.prototype.toString.call(keys) === '[object Array]' && _keys.length > 0) {
var stack = [], group = [], paramIndexs = [];
for(var i = 0, len = path.length; i < len; ++i) {
var c = path.charAt(i),
_unescaped = path.charAt(i-1) !== '\\';
if(c === '(' && _unescaped) {
stack.push(c);
group.push(c);
}
else if(c === ')' && _unescaped) {
stack.pop();
group.push(c);
// regexp group match end
if(stack.length == 0) {
paramIndexs.push(group.join('').indexOf('?:') != -1 ? 1 : 0);
group = [];
}
}
else if(stack.length > 0) {
group.push(c);
}
}
// exist unmatched regexp group
if(stack.length > 0) {
throw new Error('The Path regexp <'+ path +'> has unmatched group!');
}
// reset keys index
var namedKeys = _keys.slice(0), c = 0;
for(var j = 0, len = paramIndexs.length; j < len; ++j) {
keys.push((paramIndexs[j] == 1 && c < namedKeys.length) ? namedKeys[c++] : false);
}
}
return new RegExp('^' + path + '$', sensitive ? '' : 'i');
},
// yswang add
'_decode': function(str) {
try {
return decodeURIComponent(str);
} catch (e) {
return str;
}
},
// yswang add hack ie < 8
'_ieFrame': null, //iframe used for legacy IE (6-7)
'_hackLegacyIE': function() {
if(Path._ieFrame) {
return;
}
//check if is IE6-7 since hash change is only supported on IE8+ and
//changing hash value on IE6-7 doesn't generate history record.
// (!+"\v1") -- check is ie
var _isLegacyIE = (!+"\v1") && !("onhashchange" in window && (!document.documentMode || document.documentMode >= 8));
if(!_isLegacyIE) {
return;
}
var _ieFrame = document.createElement('iframe');
_ieFrame.src = 'about:blank';
_ieFrame.style.display = 'none';
_ieFrame.setAttribute('tabindex', '-1');
_ieFrame.attachEvent('onload', function() {
if(Path._ieFrame.frameHash && Path._ieFrame.frameHash != window.location.hash) {
window.location.hash = Path._ieFrame.frameHash;
}
});
document.body.appendChild(_ieFrame);
Path._ieFrame = _ieFrame.contentWindow;
_ieFrame = null;
}
};
Path.core.route.prototype = {
'to': function (fn) {
this.action = fn;
return this;
},
'enter': function (fns) {
if (fns instanceof Array) {
this.do_enter = this.do_enter.concat(fns);
} else {
this.do_enter.push(fns);
}
return this;
},
'exit': function (fn) {
this.do_exit = fn;
return this;
},
'partition': function () {
var parts = [], options = [], re = /\(([^}]+?)\)/g, text, i;
while (text = re.exec(this.path)) {
parts.push(text[1]);
}
options.push(this.path.split("(")[0]);
for (i = 0; i < parts.length; i++) {
options.push(options[options.length - 1] + parts[i]);
}
return options;
},
'run': function () {
var halt_execution = false, i, result, previous;
if (Path.routes.defined[this.path].hasOwnProperty("do_enter")) {
if (Path.routes.defined[this.path].do_enter.length > 0) {
for (i = 0; i < Path.routes.defined[this.path].do_enter.length; i++) {
result = Path.routes.defined[this.path].do_enter[i].call(this);
if (result === false) {
halt_execution = true;
break;
}
}
}
}
if (!halt_execution) {
Path.routes.defined[this.path].action();
}
// supported legacy IE(6,7)
if(Path._ieFrame) {
var _hash = window.location.hash;
if(_hash != Path._ieFrame.frameHash) {
_hash = _hash.replace(/"/g, '\\"');
var frameDoc = Path._ieFrame.document;
frameDoc.open();
//update iframe content to force new history record.
frameDoc.write('<html><head><title>' + document.title + '</title><script type="text/javascript">var frameHash="' + _hash + '";</script></head><body> </body></html>');
frameDoc.close();
}
}
},
// yswang add route match given url path
'match': function(path, parameterize) {
var m = this.pathRegExp.exec(path);
if(!m) {
return false;
}
if(parameterize) {
var keys = this.pathKeys, keysSize = keys.length, key, val, params = [];
for(var i = 1, len = m.length; i < len; ++i) {
key = keysSize >= i ? keys[i-1] : null;
val = 'string' == typeof m[i] ? Path._decode(m[i]) : m[i];
if(key && key.name) {
params[key.name] = val;
} else {
params.push(val);
}
}
this.params = params;
}
return true;
}
};
!this.Path && (this.Path = Path);
})(window);
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