/*
* Copyright (c) 2014-2015, Wanadev <http://www.wanadev.fr/>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Wanadev nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authored by: Fabien LOISON <http://flozz.fr/>
*/
/**
* PhotonUI - Javascript Web User Interface.
*
* @module PhotonUI
* @namespace photonui
*/
var Class = require("abitbol");
var uuid = require("uuid");
var Helpers = require("./helpers.js");
/**
* Base class for all PhotonUI Classes.
*
* wEvents:
*
* * destroy:
* - description: called before the widget was destroyed.
* - callback: function (widget)
*
* @class Base
* @constructor
* @param {Object} params An object that can contain any property that will be set to the class (optional).
*/
var Base = Class.$extend({
// Constructor
__init__: function (params) {
// New instances for object properties
this.__events = {};
this._data = {};
// wEvents
this._registerWEvents(["destroy"]);
// Apply params
params = params || {};
for (var param in params) {
if (this.$map.computedProperties[param]) {
this[param] = params[param];
}
}
// Update properties
for (var propName in this.$map.computedProperties) {
var prop = this.$map.computedProperties[propName];
if (params[propName] === undefined &&
prop.annotations["photonui-update"] &&
prop.get && prop.set) {
this[propName] = this[propName];
}
}
// Register callbacks
var ev = null;
var i = 0;
var evId = "";
if (params.callbacks) {
for (var wEvent in params.callbacks) {
ev = params.callbacks[wEvent];
if (typeof(ev) == "function") {
this.registerCallback(uuid.v4(), wEvent, ev);
} else if (ev instanceof Array) {
for (i = 0 ; i < ev.length ; i++) {
this.registerCallback(uuid.v4(), wEvent, ev[i]);
}
} else {
for (evId in ev) {
this.registerCallback(evId, wEvent, ev[evId]);
}
}
}
}
},
//////////////////////////////////////////
// Properties and Accessors //
//////////////////////////////////////////
// ====== Public properties ======
/**
* Arbitrary data
*
* @property data
* @type object
* @default {}
*/
_data: null,
getData: function () {
return this._data;
},
setData: function (data) {
this._data = data;
},
// ====== Private properties ======
/**
* Object containing references javascript events binding (for widget
* internal use).
*
* @property __events
* @type Object
* @private
*/
__events: null, // Javascript internal event
/**
* Object containing references to registered callbacks.
*
* @property __callbacks
* @type Object
* @private
*/
__callbacks: null, // Registered callback
//////////////////////////////////////////
// Methods //
//////////////////////////////////////////
// ====== Public methods ======
/**
* Destroy the class.
*
* @method destroy
*/
destroy: function () {
this._callCallbacks("destroy");
for (var id in this.__events) {
this._unbindEvent(id);
}
},
/**
* Register a callback for any PhotonUI/Widget event (called wEvent).
*
* Callback signature:
*
* function (Object(Base/Widget) [, arg1 [, arg2 [, ...]]])
*
* @method registerCallback
* @param {String} id An unique id for the callback.
* @param {String} wEvent the PhotonUI/Widget event name.
* @param {Function} callback The callback function.
* @param {Object} thisArg The value of this (optionnal, default = current widget).
*/
registerCallback: function (id, wEvent, callback, thisArg) {
if (!this.__callbacks[wEvent]) {
Helpers.log("error", "This widget has no '" + wEvent + "' wEvent.");
return;
}
this.__callbacks[wEvent][id] = {
callback: callback,
thisArg: thisArg || null
};
},
/**
* Remove a registered callback.
*
* @method removeCallback
* @param {String} id The id of the callback.
*/
removeCallback: function (id) {
for (var wEvent in this.__callbacks) {
if (this.__callbacks[wEvent][id]) {
delete this.__callbacks[wEvent][id];
}
}
},
// ====== Private methods ======
/**
* Force the update of the given properties.
*
* This method is deprecated.
* One should use '@photonui-update' abitbol's annotation on concerned properties.
*
* @method _updateProperties
* @private
* @deprecated
* @param {Array} properties The properties to update.
*/
_updateProperties: function (properties) {
Helpers.log("warn", "'photonui.Base._updateProperties()' is deprecated." +
" One should use '@photonui-update' abitbol's annotation on concerned properties.");
for (var i = 0 ; i < properties.length ; i++) {
this[properties[i]] = this[properties[i]];
}
},
/**
* Javascript event binding (for internal use).
*
* @method _bindEvent
* @private
* @param {String} id An unique id for the event.
* @param {DOMElement} element The element on which the event will be bind.
* @param {String} evName The event name (e.g. "mousemove", "click",...).
* @param {Function} callback The function that will be called when the event occured.
*/
_bindEvent: function (id, element, evName, callback) {
this._unbindEvent(id);
this.__events[id] = {
evName: evName,
element: element,
callback: callback
};
this.__events[id].element.addEventListener(
this.__events[id].evName,
this.__events[id].callback,
false
);
},
/**
* Unbind javascript event.
*
* @method _unbindEvent
* @private
* @param {String} id The id of the event.
*/
_unbindEvent: function (id) {
if (!this.__events[id]) {
return;
}
this.__events[id].element.removeEventListener(
this.__events[id].evName,
this.__events[id].callback,
false
);
delete this.__events[id];
},
/**
* Register available wEvent.
*
* @method _registerWEvents
* @private
* @param {Array} wEvents
*/
_registerWEvents: function (wEvents) {
if (this.__callbacks === null) {
this.__callbacks = {};
}
for (var i in wEvents) {
this.__callbacks[wEvents[i]] = {};
}
},
/**
* Call all callbacks for the given wEvent.
*
* NOTE: the first argument passed to the callback is the current widget.
* NOTE²: if the thisArg of the callback is null, this will be binded to the current widget.
*
* @method _callCallbacks
* @private
* @param {String} wEvent The widget event.
* @param {Array} params Parametters that will be sent to the callbacks.
*/
_callCallbacks: function (wEvent, params) {
params = params || [];
for (var id in this.__callbacks[wEvent]) {
this.__callbacks[wEvent][id].callback.apply(
this.__callbacks[wEvent][id].thisArg || this,
[this].concat(params)
);
}
}
});
module.exports = Base;
