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var MrClay = window.MrClay || {};
/**
* Simplified access to/manipulation of the query string
*
* Based on: http://adamv.com/dev/javascript/files/querystring.js
* Design pattern: http://www.litotes.demon.co.uk/js_info/private_static.html#wConst
*/
MrClay.QueryString = function(){
/**
* @static
* @private
*/
var parse = function(str) {
var assignments = str.split('&')
,obj = {}
,propValue;
for (var i = 0, l = assignments.length; i < l; ++i) {
propValue = assignments[i].split('=');
if (propValue.length > 2
|| -1 != propValue[0].indexOf('+')
|| propValue[0] == ''
) {
continue;
}
if (propValue.length == 1) {
propValue[1] = propValue[0];
}
obj[unescape(propValue[0])] = unescape(propValue[1].replace(/\+/g, ' '));
}
return obj;
};
/**
* Constructor (MrClay.QueryString becomes this)
*
* @param mixed A window object, a query string, or empty (default current window)
*/
function construct_(spec) {
spec = spec || window;
if (typeof spec == 'object') {
// get querystring from window
this.window = spec;
spec = spec.location.search.substr(1);
} else {
this.window = window;
}
this.vars = parse(spec);
}
/**
* Reload the window
*
* @static
* @public
* @param object vars Specify querystring vars only if you wish to replace them
* @param object window_ window to be reloaded (current window by default)
*/
construct_.reload = function(vars, window_) {
window_ = window_ || window;
vars = vars || (new MrClay.QueryString(window_)).vars;
var l = window_.location
,currUrl = l.href
,s = MrClay.QueryString.toString(vars)
,newUrl = l.protocol + '//' + l.hostname + l.pathname
+ (s ? '?' + s : '') + l.hash;
if (currUrl == newUrl) {
l.reload();
} else {
l.assign(newUrl);
}
};
/**
* Get the value of a querystring var
*
* @static
* @public
* @param string key
* @param mixed default_ value to return if key not found
* @param object window_ window to check (current window by default)
* @return mixed
*/
construct_.get = function(key, default_, window_) {
window_ = window_ || window;
return (new MrClay.QueryString(window_)).get(key, default_);
};
/**
* Reload the page setting one or multiple querystring vars
*
* @static
* @public
* @param mixed key object of query vars/values, or a string key for a single
* assignment
* @param mixed null for multiple settings, the value to assign for single
* @param object window_ window to reload (current window by default)
*/
construct_.set = function(key, value, window_) {
window_ = window_ || window;
(new MrClay.QueryString(window_)).set(key, value).reload();
};
/**
* Convert an object of query vars/values to a querystring
*
* @static
* @public
* @param object query vars/values
* @return string
*/
construct_.toString = function(vars) {
var pieces = [];
for (var prop in vars) {
pieces.push(escape(prop) + '=' + escape(vars[prop]));
}
return pieces.join('&');
};
/**
* @public
*/
construct_.prototype.reload = function() {
MrClay.QueryString.reload(this.vars, this.window);
return this;
};
/**
* @public
*/
construct_.prototype.get = function(key, default_) {
if (typeof default_ == 'undefined') {
default_ = null;
}
return (this.vars[key] == null)
? default_
: this.vars[key];
};
/**
* @public
*/
construct_.prototype.set = function(key, value) {
var obj = {};
if (typeof key == 'string') {
obj[key] = value;
} else {
obj = key;
}
for (var prop in obj) {
if (obj[prop] == null) {
delete this.vars[prop];
} else {
this.vars[prop] = obj[prop];
}
}
return this;
};
/**
* @public
*/
construct_.prototype.toString = function() {
return QueryString.toString(this.vars);
};
return construct_;
}(); // define and execute
|
