egroupware_official/etemplate/js/et2_dataview_controller_selection.js

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/**
* eGroupWare eTemplate2
*
* @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 2011-2012
* @version $Id$
*/
/*egw:uses
et2_dataview_view_aoi;
egw_action.egw_keymanager;
*/
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/**
* The selectioManager is internally used by the et2_dataview_controller class
* to manage the row selection.
* As the action system does not allow selection of entries which are currently
* not in the dom tree, we have to manage this in this class. The idea is to
* manage an external action object interface for each visible row and proxy all
* state changes between an dummy action object, that does no selection handling,
* and the external action object interface.
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*/
var et2_dataview_selectionManager = Class.extend({
init: function (_indexMap, _actionObjectManager, _queryRangeCallback,
_makeVisibleCallback, _context) {
// Copy the arguments
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this._indexMap = _indexMap;
this._actionObjectManager = _actionObjectManager;
this._queryRangeCallback = _queryRangeCallback;
this._makeVisibleCallback = _makeVisibleCallback;
this._context = _context;
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// Internal map which contains all curently selected uids and their
// state
this._registeredRows = {};
this._focusedEntry = null;
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this._invertSelection = false;
this._inUpdate = false;
this._total = 0;
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},
setIndexMap: function (_indexMap) {
this._indexMap = _indexMap;
},
setTotalCount: function (_total) {
this._total = _total;
},
registerRow: function (_uid, _idx, _tr, _links) {
// Get the corresponding entry from the registered rows array
var entry = this._getRegisteredRowsEntry(_uid);
// If the row has changed unregister the old one and do not delete
// entry from the entry map
if (entry.tr && entry.tr !== _tr) {
this.unregisterRow(_uid, entry.tr, true);
}
// Create the AOI for the tr
if (!entry.tr && _links)
{
this._attachActionObjectInterface(entry, _tr, _uid);
this._attachActionObject(entry, _tr, _uid, _links, _idx)
}
// Update the entry
entry.ao._index = entry.idx = _idx;
entry.tr = _tr;
// Update the visible state of the _tr
this._updateEntryState(entry, entry.state);
},
unregisterRow: function (_uid, _tr, _noDelete) {
// _noDelete defaults to false
_noDelete = _noDelete ? true : false;
if (typeof this._registeredRows[_uid] !== "undefined"
&& this._registeredRows[_uid].tr === _tr)
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{
this._inUpdate = true;
this._registeredRows[_uid].tr = null;
this._registeredRows[_uid].aoi = null;
// Remove the action object from its container
if (this._registeredRows[_uid].ao)
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{
this._registeredRows[_uid].ao.remove();
this._registeredRows[_uid].ao = null;
}
if (!_noDelete
&& this._registeredRows[_uid].state === EGW_AO_STATE_NORMAL)
{
delete this._registeredRows[_uid];
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}
this._inUpdate = false;
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}
},
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resetSelection: function () {
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this._invertSelection = false;
for (var key in this._registeredRows)
{
this.setSelected(key, false);
}
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},
setSelected: function (_uid, _selected) {
var entry = this._getRegisteredRowsEntry(_uid);
this._updateEntryState(entry,
egwSetBit(entry.state, EGW_AO_STATE_SELECTED, _selected));
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},
setFocused: function (_uid, _focused) {
// Reset the state of the currently focused entry
if (this._focusedEntry)
{
this._updateEntryState(this._focusedEntry,
egwSetBit(this._focusedEntry.state, EGW_AO_STATE_FOCUSED,
false));
this._focusedEntry = null;
}
// Mark the new given uid as focused
if (_focused)
{
var entry = this._focusedEntry = this._getRegisteredRowsEntry(_uid);
this._updateEntryState(entry,
egwSetBit(entry.state, EGW_AO_STATE_FOCUSED, true));
}
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},
selectAll: function () {
// Reset the selection
this.resetSelection();
// Set the "invert selection" flag
this._invertSelection = true;
// Update the selection
for (var key in this._registeredRows)
{
var entry = this._registeredRows[key];
this._updateEntryState(entry, entry.state);
}
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},
getSelected: function () {
// Collect all currently selected ids
var ids = [];
for (var key in this._registeredRows)
{
if (egwBitIsSet(this._registeredRows[key].state, EGW_AO_STATE_SELECTED))
{
ids.push(key);
}
}
// Return an array containing those ids
return {
"inverted": this._invertSelection,
"ids": ids
}
},
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/** -- PRIVATE FUNCTIONS -- **/
_attachActionObjectInterface: function (_entry, _tr, _uid) {
// Create the AOI which is used internally in the selection manager
// this AOI is not connected to the AO, as the selection manager
// cares about selection etc.
_entry.aoi = new et2_dataview_rowAOI(_tr);
_entry.aoi.setStateChangeCallback(
function (_newState, _changedBit, _shiftState) {
if (_changedBit === EGW_AO_STATE_SELECTED)
{
// Call the select handler
this._handleSelect(
_uid,
_entry,
egwBitIsSet(_shiftState, EGW_AO_SHIFT_STATE_BLOCK),
egwBitIsSet(_shiftState, EGW_AO_SHIFT_STATE_MULTI)
);
}
}, this);
},
_getDummyAOI: function (_entry, _tr, _uid, _idx) {
// Create AOI
var dummyAOI = new egwActionObjectInterface();
var self = this;
// Handling for Action Implementations updating the state
dummyAOI.doSetState = function (_state) {
if (!self._inUpdate)
{
// Update the "focused" flag
self.setFocused(_uid, egwBitIsSet(_state, EGW_AO_STATE_FOCUSED));
// Generally update the state
self._updateState(_uid, _state);
}
};
// Handle the "make visible" event, pass the request to the parent
// controller
dummyAOI.doMakeVisible = function () {
self._makeVisibleCallback.call(self._context, _idx);
}
// Connect the the two AOIs
dummyAOI.doTriggerEvent = _entry.aoi.doTiggerEvent;
// Implementation of the getDOMNode function, so that the event
// handlers can be properly bound
dummyAOI.getDOMNode = function () { return _tr; };
return dummyAOI;
},
_attachActionObject: function (_entry, _tr, _uid, _links, _idx) {
// Get the dummyAOI which connects the action object to the tr but
// does no selection handling
var dummyAOI = this._getDummyAOI(_entry, _tr, _uid, _idx);
// Create an action object for the tr and connect it to a dummy AOI
_entry.ao = this._actionObjectManager.addObject(_uid, dummyAOI);
_entry.ao.updateActionLinks(_links);
_entry.ao._index = _idx;
// Overwrite some functions like "traversePath", "getNext" and
// "getPrevious"
var self = this;
function getIndexAO (_idx) {
// Check whether the index is in the index map
if (typeof self._indexMap[_idx] !== "undefined"
&& self._indexMap[_idx].uid)
{
return self._getRegisteredRowsEntry(self._indexMap[_idx].uid).ao;
}
return null;
}
function getElementRelatively (_step) {
return getIndexAO(Math.max(0,
Math.min(self._total - 1, _entry.idx + _step)));
};
_entry.ao.getPrevious = function (_step) {
return getElementRelatively(-_step);
};
_entry.ao.getNext = function (_step) {
return getElementRelatively(_step);
};
_entry.ao.traversePath = function (_obj) {
// Get the start and the stop index
var s = Math.min(this._index, _obj._index);
var e = Math.max(this._index, _obj._index);
var result = [];
for (var i = s; i < e; i++)
{
var ao = getIndexAO(i);
if (ao)
{
result.push(ao);
}
}
return result;
};
},
_updateState: function (_uid, _state) {
var entry = this._getRegisteredRowsEntry(_uid);
this._updateEntryState(entry, _state);
return entry;
},
_updateEntryState: function (_entry, _state) {
// Update the state of the entry
_entry.state = _state;
if (this._invertSelection)
{
_state ^= EGW_AO_STATE_SELECTED;
}
// Update the state if it has changed
if ((_entry.aoi && _entry.aoi.getState() !== _state) || _entry.state != _state)
{
this._inUpdate = true; // Recursion prevention
// Update the visual state
if (_entry.aoi)
{
_entry.aoi.setState(_state);
}
// Update the state of the action object
if (_entry.ao)
{
_entry.ao.setSelected(egwBitIsSet(_state, EGW_AO_STATE_SELECTED));
_entry.ao.setFocused(egwBitIsSet(_state, EGW_AO_STATE_FOCUSED));
}
this._inUpdate = false;
// Delete the element if state was set to "NORMAL" and there is
// no tr
if (_state === EGW_AO_STATE_NORMAL && !_entry.tr)
{
delete this._registeredRows[_entry.uid];
}
}
},
_getRegisteredRowsEntry: function (_uid) {
if (typeof this._registeredRows[_uid] === "undefined")
{
this._registeredRows[_uid] = {
"uid": _uid,
"idx": null,
"state": EGW_AO_STATE_NORMAL,
"tr": null,
"aoi": null,
"ao": null
};
}
return this._registeredRows[_uid];
},
_handleSelect: function (_uid, _entry, _shift, _ctrl) {
// If not "_ctrl" is set, reset the selection
if (!_ctrl)
{
this.resetSelection();
}
// Mark the element that was clicked as selected
var entry = this._getRegisteredRowsEntry(_uid);
this.setSelected(_uid,
!_ctrl || !egwBitIsSet(entry.state, EGW_AO_STATE_SELECTED));
// Focus the element if shift is not pressed
if (!_shift)
{
this.setFocused(_uid, true);
}
else if (this._focusedEntry)
{
this._selectRange(this._focusedEntry.idx, _entry.idx);
}
},
_selectRange: function (_start, _stop) {
// Contains ranges that are not currently in the index map and that have
// to be queried
var queryRanges = [];
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// Iterate over the given range and select the elements in the range
// from _start to _stop
var naStart = false;
var s = Math.min(_start, _stop);
var e = Math.max(_stop, _start);
for (var i = s; i <= e; i++)
{
if (typeof this._indexMap[i] !== "undefined" &&
this._indexMap[i].uid)
{
// Add the range to the "queryRanges"
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if (naStart !== false)
{
queryRanges.push(et2_bounds(naStart, i - 1));
naStart = false;
}
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// Select the element
this.setSelected(this._indexMap[i].uid, true);
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}
else if (naStart === false)
{
naStart = i;
}
}
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// Add the last range to the "queryRanges"
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if (naStart !== false)
{
queryRanges.push(et2_bounds(naStart, i - 1));
naStart = false;
}
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// Query all unknown ranges from the server
for (var i = 0; i < queryRanges.length; i++)
{
this._queryRangeCallback.call(this._context, queryRanges[i],
function (_order) {
for (var j = 0; j < _order.length; j++)
{
this.setSelected(_order[j], true);
}
}, this);
}
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}
});