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egroupware_official/etemplate/js/et2_core_inheritance.js
2014-05-06 20:05:08 +00:00

160 lines
3.8 KiB
JavaScript

/**
* EGroupware eTemplate2 - JS code for implementing inheritance with attributes
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @subpackage api
* @link http://www.egroupware.org
* @author Andreas Stöckel
* @copyright Stylite 2011
* @version $Id$
*/
"use strict";
/*egw:uses
et2_core_common;
egw_inheritance;
*/
var ClassWithAttributes = Class.extend(
{
/**
* Returns the value of the given attribute. If the property does not
* exist, an error message is issued.
*
* @param {string} _name
* @return {*}
*/
getAttribute: function(_name) {
if (typeof this.attributes[_name] != "undefined" &&
!this.attributes[_name].ignore)
{
if (typeof this["get_" + _name] == "function")
{
return this["get_" + _name]();
}
else
{
return this[_name];
}
}
else
{
egw.debug("error", this, "Attribute '" + _name + "' does not exist!");
}
},
/**
* The setAttribute function sets the attribute with the given name to
* the given value. _override defines, whether this[_name] will be set,
* if this key already exists. _override defaults to true. A warning
* is issued if the attribute does not exist.
*
* @param {string} _name
* @param {*} _value
* @param {boolean} _override
*/
setAttribute: function(_name, _value, _override) {
if (typeof this.attributes[_name] != "undefined")
{
if (!this.attributes[_name].ignore)
{
if (typeof _override == "undefined")
{
_override = true;
}
var val = et2_checkType(_value, this.attributes[_name].type,
_name, this);
if (typeof this["set_" + _name] == "function")
{
this["set_" + _name](val);
}
else if (_override || typeof this[_name] == "undefined")
{
this[_name] = val;
}
}
}
else
{
egw.debug("warn", this, "Attribute '" + _name + "' does not exist!");
}
},
/**
* generateAttributeSet sanitizes the given associative array of attributes
* (by passing each entry to "et2_checkType" and checking for existance of
* the attribute) and adds the default values to the associative array.
*
* @param {object} _attrs is the associative array containing the attributes.
*/
generateAttributeSet: function(_attrs) {
// Sanity check and validation
for (var key in _attrs)
{
if (typeof this.attributes[key] != "undefined")
{
if (!this.attributes[key].ignore)
{
_attrs[key] = et2_checkType(_attrs[key], this.attributes[key].type,
key, this);
}
}
else
{
// Key does not exist - delete it and issue a warning
delete(_attrs[key]);
egw.debug("warn", this, "Attribute '" + key +
"' does not exist in " + _attrs.type+"!");
}
}
// Include default values or already set values for this attribute
for (var key in this.attributes)
{
if (typeof _attrs[key] == "undefined")
{
var _default = this.attributes[key]["default"];
if (_default == et2_no_init)
{
_default = undefined;
}
_attrs[key] = _default;
}
}
return _attrs;
},
/**
* The initAttributes function sets the attributes to their default
* values. The attributes are not overwritten, which means, that the
* default is only set, if either a setter exists or this[propName] does
* not exist yet.
*
* @param {object} _attrs is the associative array containing the attributes.
*/
initAttributes: function(_attrs) {
for (var key in _attrs)
{
if (typeof this.attributes[key] != "undefined" && !this.attributes[key].ignore && !(_attrs[key] == undefined))
{
this.setAttribute(key, _attrs[key], false);
}
}
},
_validate_attributes: function(attributes)
{
// Validate the attributes
for (var key in attributes)
{
et2_validateAttrib(key, attributes[key]);
}
}
});