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egroupware_official/etemplate/js/et2_dataview_interfaces.js

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/**
* EGroupware eTemplate2 - Contains interfaces used inside the dataview
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @subpackage dataview
* @link http://www.egroupware.org
* @author Andreas Stöckel
* @copyright Stylite 2011
* @version $Id$
*/
"use strict";
/*egw:uses
et2_core_inheritance;
*/
var et2_dataview_IInvalidatable = new Interface({
invalidate: function() {}
});
var et2_dataview_IViewRange = new Interface({
setViewRange: function(_range) {}
});
/**
* Interface a data provider has to implement. The data provider functions are
* called by the et2_dataview_controller class. The data provider basically acts
* like the egw api egw_data extension, but some etemplate specific stuff has
* been stripped away -- the implementation (for the nextmatch widget that is
* et2_extension_nextmatch_dataprovider) has to take care of that.
*/
var et2_IDataProvider = new Interface({
/**
* This function is used by the et2_dataview_controller to fetch data for
* a certain range. The et2_dataview_controller provides data which allows
* to only update elements which really have changed.
*
* @param queriedRange is an object of the following form:
* {
* start: <START INDEX>,
* num_rows: <COUNT OF ENTRIES>
* }
* @param knownRange is an array of the above form and informs the
* implementation which range is already known to the client. This parameter
* may be null in order to indicate that the client currently has no valid
* data.
* @param lastModification is the last timestamp that was returned from the
* data provider and for which the client has data. It may be null in order
* to indicate, that the client currently has no data or needs a complete
* refresh.
* @param callback is the function that should get called, once the data
* is available. The data passed to the callback function has the
* following form:
* {
* order: [uid, ...],
* total: <TOTAL COUNT>,
* lastModification: <LAST MODIFICATION TIMESTAMP>
* }
* @param context is the context in which the callback function will get
* called.
*/
dataFetch: function (_queriedRange, _lastModification, _callback, _context) {},
/**
* Registers the intrest in a certain uid for a callback function. If
* the data for that uid changes or gets loaded, the given callback
* function is called. If the data for the given uid is available at the
* time of registering the callback, the callback is called immediately.
*
* @param _uid is the uid for which the callback should be registered.
* @param _callback is the callback which should get called.
* @param _context is an optional parameter which can
*/
dataRegisterUID: function (_uid, _callback, _context) {},
/**
* Unregisters the intrest of updates for a certain data uid.
*
* @param _uid is the data uid for which the callbacks should be
* unregistered.
* @param _callback specifies the specific callback that should be
* unregistered. If it evaluates to false, all callbacks (or those
* matching the optionally given context) are removed.
* @param _context specifies the callback context that should be
* unregistered. If it evaluates to false, all callbacks (or those
* matching the optionally given callback function) are removed.
*/
dataUnregisterUID: function (_uid, _callback, _context) {}
});