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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of QtSystemTest.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
Js.include_check(Class.isFn === undefined, 'Class.js already included');
function Class(){ };
Class.DebugEnabled = false;
//Class.DebugEnabled = true;
Class.debug = function debug() {
if (Class.DebugEnabled) {
var str = '';
for (var i=0; i<arguments.length; i++) {
str += arguments[i];
}
console.log(str);
}
}
Class.isFn = function(fn) { return typeof fn === 'function'; };
Class.isBothFn = function (fn, superFn) {
var debug = Class.debug;
debug('\t is fn ', (fn ? fn.name: undefined), ', superFn: ', (superFn ? superFn.name : undefined) , ' is a function');
return Class.isFn(fn) && Class.isFn(superFn)
};
Class.create = function(superClass, constructor) {
// if 2 args are passed, then SuperClass is specified and else it is of the
// from X.extend(definition-of-y)
// SuperClass need not be specified in that case, SubClass definition will be
// in the SuperClass arg
var SuperClass, SubClass,
debug = Class.debug;
if( arguments.length == 1) {
SuperClass = this;
SubClass = superClass; // has the definition
}else {
SubClass = constructor;
SuperClass = superClass;
}
debug('Superclass is ', SuperClass.name);
// NOTE constructor.name for the object created using this is empty
var definition = function () {
// about to call the constructor of this object, so the super classes are already
// constructor and the prototype of this is already set.
var myProto = this;
debug('My Prototype already has : ', Object.keys(myProto));
// define _super before calling the construtor
this._super = SuperClass; // _super from constructor should work
// constructor returns the exported public members
var publicMembers = SubClass.apply(this, arguments); // returns the exported members
debug('Exported members are: ', Object.keys(publicMembers));
for (var name in publicMembers) {
debug('\t Testing if ', name, ' should be overridden');
(function(member, superMember) {
// overide the definition in my proto if required
if ( Class.isFn(member) ) {
var s = Class.isFn(superMember) ? superMember : undefined;
myProto[name] = function() {
var tmp = this._super;
this._super = s;
var ret = member.apply(this, arguments);
this._super = tmp;
return ret;
}
} else {
myProto[name] = member;
}
})(publicMembers[name], myProto[name]);
}
}; // definition
definition.prototype = new SuperClass; // establish prototype chain
definition.prototype.constructor = definition; // and the ctor
definition.extend = SuperClass.extend || Class.create
return definition;
}; // Class.create
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