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odoo.define('web.Class', function () {
"use strict";
/**
* Improved John Resig's inheritance, based on:
*
* Simple JavaScript Inheritance
* By John Resig http://ejohn.org/
* MIT Licensed.
*
* Adds "include()"
*
* Defines The Class object. That object can be used to define and inherit classes using
* the extend() method.
*
* Example::
*
* var Person = Class.extend({
* init: function(isDancing){
* this.dancing = isDancing;
* },
* dance: function(){
* return this.dancing;
* }
* });
*
* The init() method act as a constructor. This class can be instanced this way::
*
* var person = new Person(true);
* person.dance();
*
* The Person class can also be extended again:
*
* var Ninja = Person.extend({
* init: function(){
* this._super( false );
* },
* dance: function(){
* // Call the inherited version of dance()
* return this._super();
* },
* swingSword: function(){
* return true;
* }
* });
*
* When extending a class, each re-defined method can use this._super() to call the previous
* implementation of that method.
*
* @class Class
*/
function OdooClass(){}
var initializing = false;
var fnTest = /xyz/.test(function(){xyz();}) ? /\b_super\b/ : /.*/;
/**
* Subclass an existing class
*
* @param {Object} prop class-level properties (class attributes and instance methods) to set on the new class
*/
OdooClass.extend = function() {
var _super = this.prototype;
// Support mixins arguments
var args = _.toArray(arguments);
args.unshift({});
var prop = _.extend.apply(_,args);
// Instantiate a web class (but only create the instance,
// don't run the init constructor)
initializing = true;
var This = this;
var prototype = new This();
initializing = false;
// Copy the properties over onto the new prototype
_.each(prop, function(val, name) {
// Check if we're overwriting an existing function
prototype[name] = typeof prop[name] == "function" &&
fnTest.test(prop[name]) ?
(function(name, fn) {
return function() {
var tmp = this._super;
// Add a new ._super() method that is the same
// method but on the super-class
this._super = _super[name];
// The method only need to be bound temporarily, so
// we remove it when we're done executing
var ret = fn.apply(this, arguments);
this._super = tmp;
return ret;
};
})(name, prop[name]) :
prop[name];
});
// The dummy class constructor
function Class() {
if(this.constructor !== OdooClass){
throw new Error("You can only instanciate objects with the 'new' operator");
}
// All construction is actually done in the init method
this._super = null;
if (!initializing && this.init) {
var ret = this.init.apply(this, arguments);
if (ret) { return ret; }
}
return this;
}
Class.include = function (properties) {
_.each(properties, function(val, name) {
if (typeof properties[name] !== 'function'
|| !fnTest.test(properties[name])) {
prototype[name] = properties[name];
} else if (typeof prototype[name] === 'function'
&& prototype.hasOwnProperty(name)) {
prototype[name] = (function (name, fn, previous) {
return function () {
var tmp = this._super;
this._super = previous;
var ret = fn.apply(this, arguments);
this._super = tmp;
return ret;
};
})(name, properties[name], prototype[name]);
} else if (typeof _super[name] === 'function') {
prototype[name] = (function (name, fn) {
return function () {
var tmp = this._super;
this._super = _super[name];
var ret = fn.apply(this, arguments);
this._super = tmp;
return ret;
};
})(name, properties[name]);
}
});
};
// Populate our constructed prototype object
Class.prototype = prototype;
// Enforce the constructor to be what we expect
Class.constructor = Class;
// And make this class extendable
Class.extend = this.extend;
return Class;
};
return OdooClass;
});
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