egroupware/etemplate/js/et2_dataview_view_rowProvider.js

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/**
* eGroupWare eTemplate2 - Class which contains a factory method for rows
*
* @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 $Id$
*/
/*egw:uses
jquery.jquery;
et2_core_inheritance;
et2_core_interfaces;
et2_core_arrayMgr;
et2_core_widget;
*/
/**
* The row provider contains prototypes (full clonable dom-trees)
* for all registered row types.
*/
var et2_dataview_rowProvider = Class.extend({
init: function(_outerId, _columnIds) {
// Copy the given parameters
this._outerId = _outerId;
this._columnIds = _columnIds;
this._prototypes = {};
this._template = null;
this._mgrs = null;
this._rootWidget = null;
// Create the default row "prototypes"
this._createFullRowPrototype();
this._createDefaultPrototype();
this._createEmptyPrototype();
},
/**
* Returns a clone of the prototype with the given name. If the generator
* callback function is given, this function is called if the prototype
* does not yet registered.
*/
getPrototype: function(_name, _generator, _context) {
if (typeof this._prototypes[_name] == "undefined")
{
if (typeof _generator != "undefined")
{
this._prototypes[_name] = _generator.call(_context, this._outerId,
this._columnIds);
}
else
{
return null;
}
}
return this._prototypes[_name].clone();
},
/**
* Returns an array containing objects which have variable attributes
*/
_getVariableAttributeSet: function(_widget) {
var variableAttributes = [];
_widget.iterateOver(function(_widget) {
// Create the attribtues
var hasAttr = false;
var widgetData = {
"widget": _widget,
"data": []
};
// Get all attribute values
for (var key in _widget.attributes)
{
if (!_widget.attributes[key].ignore &&
typeof _widget.options[key] != "undefined")
{
var val = _widget.options[key];
// TODO: Improve detection
if (typeof val == "string" && val.indexOf("$") >= 0)
{
hasAttr = true;
widgetData.data.push({
"attribute": key,
"expression": val
});
}
}
}
// Add the entry if there is any data in it
if (hasAttr)
{
variableAttributes.push(widgetData);
}
}, this);
return variableAttributes;
},
_seperateWidgets: function(_varAttrs) {
// The detachable array contains all widgets which implement the
// et2_IDetachedDOM interface for all needed attributes
var detachable = [];
// The remaining array creates all widgets which have to be completely
// cloned when the widget tree is created
var remaining = [];
// Iterate over the widgets
for (var i = 0; i < _varAttrs.length; i++)
{
var widget = _varAttrs[i].widget;
// Check whether the widget parents are not allready in the "remaining"
// slot - if this is the case do not include the widget at all.
var insertWidget = true;
var checkWidget = function (_widget) {
if (_widget.parent != null)
{
for (var i = 0; i < remaining.length; i++)
{
if (remaining[i].widget == _widget.parent)
{
insertWidget = false;
return;
}
}
checkWidget(_widget.parent);
}
};
checkWidget(widget);
// Handle the next widget if this one should not be included.
if (!insertWidget)
{
continue;
}
// Check whether the widget implements the et2_IDetachedDOM interface
var isDetachable = false;
if (widget.implements(et2_IDetachedDOM))
{
// Get all attributes the widgets supports to be set in the
// "detached" mode
var supportedAttrs = [];
widget.getDetachedAttributes(supportedAttrs);
supportedAttrs.push("id");
isDetachable = true;
for (var j = 0; j < _varAttrs[i].data.length/* && isDetachable*/; j++)
{
var data = _varAttrs[i].data[j];
var supportsAttr = supportedAttrs.indexOf(data.attribute) != -1;
if (!supportsAttr)
{
et2_debug("warn", "et2_IDetachedDOM widget " +
widget._type + " does not support " + data.attribute);
}
isDetachable &= supportsAttr;
}
}
// Insert the widget into the correct slot
if (isDetachable)
{
detachable.push(_varAttrs[i]);
}
else
{
remaining.push(_varAttrs[i]);
}
}
return {
"detachable": detachable,
"remaining": remaining
};
},
/**
* Removes to DOM code for all widgets in the "remaining" slot
*/
_stripTemplateRow: function(_rowTemplate) {
_rowTemplate.placeholders = [];
for (var i = 0; i < _rowTemplate.seperated.remaining.length; i++)
{
var entry = _rowTemplate.seperated.remaining[i];
// Issue a warning - widgets which do not implement et2_IDOMNode
// are very slow
et2_debug("warn", "Non-clonable widget in dataview row - this " +
"might be slow", entry);
// Set the placeholder for the entry to null
entry.placeholder = null;
// Get the outer DOM-Node of the widget
if (entry.widget.implements(et2_IDOMNode))
{
var node = entry.widget.getDOMNode(entry.widget);
if (node && node.parentNode)
{
// Get the parent node and replace the node with a placeholder
entry.placeholder = document.createElement("span");
node.parentNode.replaceChild(entry.placeholder, node);
_rowTemplate.placeholders.push({
"widget": entry.widget,
"func": this._compileDOMAccessFunc(_rowTemplate.row,
entry.placeholder)
});
}
}
}
},
_nodeIndex: function(_node) {
for (var i = 0; i < _node.parentNode.childNodes.length; i++)
{
if (_node.parentNode.childNodes[i] == _node)
{
return i;
}
}
return -1;
},
/**
* Returns a function which does a relative access on the given DOM-Node
*/
_compileDOMAccessFunc: function(_root, _target) {
function recordPath(_root, _target, _path)
{
if (typeof _path == "undefined")
{
_path = [];
}
if (_root != _target)
{
// Get the index of _target in its parent node
var idx = this._nodeIndex(_target);
if (idx >= 0)
{
// Add the access selector
_path.unshift("childNodes[" + idx + "]");
// Record the remaining path
return recordPath.call(this, _root, _target.parentNode, _path);
}
throw("Internal error while compiling DOM access function.");
}
else
{
_path.unshift("_node");
return "return " + _path.join(".") + ";";
}
}
return new Function("_node", recordPath.call(this, _root, _target));
},
/**
* Builds relative paths to the DOM-Nodes and compiles fast-access functions
*/
_buildNodeAccessFuncs: function(_rowTemplate) {
for (var i = 0; i < _rowTemplate.seperated.detachable.length; i++)
{
var entry = _rowTemplate.seperated.detachable[i];
// Get all needed nodes from the widget
var nodes = entry.widget.getDetachedNodes();
var nodeFuncs = entry.nodeFuncs = new Array(nodes.length);
// Record the path to each DOM-Node
for (var j = 0; j < nodes.length; j++)
{
nodeFuncs[j] = this._compileDOMAccessFunc(_rowTemplate.row,
nodes[j]);
}
}
},
/**
* Creates the data row prototype
*/
setDataRowTemplate: function(_widgets, _rootWidget) {
// Copy the root widget
this._rootWidget = _rootWidget;
// Create the base row
var row = this.getPrototype("default");
// Copy the row template
var rowTemplate = {
"row": row[0],
"widgets": _widgets,
"root": _rootWidget,
"seperated": null,
"mgrs": _rootWidget.getArrayMgrs()
};
// Create the row widget and insert the given widgets into the row
var rowWidget = new et2_dataview_rowWidget(rowTemplate.mgrs, row[0]);
rowWidget.createWidgets(_widgets);
// Get the set containing all variable attributes
var variableAttributes = this._getVariableAttributeSet(rowWidget);
// Filter out all widgets which do not implement the et2_IDetachedDOM
// interface or do not support all attributes listed in the et2_IDetachedDOM
// interface. A warning is issued for all those widgets as they heavily
// degrade the performance of the dataview
var seperated = rowTemplate.seperated =
this._seperateWidgets(variableAttributes);
// Remove all DOM-Nodes of all widgets inside the "remaining" slot from
// the row-template, then build the access functions for the detachable
// widgets
this._stripTemplateRow(rowTemplate);
this._buildNodeAccessFuncs(rowTemplate);
this._prototypes["dataRow"] = row;
this._template = rowTemplate;
},
getDataRow: function(_data, _row, _idx) {
// Create array managers with the given data merged in
var mgrs = et2_arrayMgrs_expand(rowWidget, this._template.mgrs,
_data, _idx);
// Insert the widgets into the row which do not provide the functions
// to set the _data directly
var rowWidget = null;
if (this._template.seperated.remaining.length > 0)
{
// Transform the variable attributes
for (var i = 0; i < this._template.seperated.remaining.length; i++)
{
var entry = this._template.seperated.remaining[i];
for (var j = 0; j < entry.data.length; j++)
{
var set = entry.data[j];
entry.widget.options[set.attribute] = mgrs["content"].expandName(set.expression);
}
}
// Create the row widget
var rowWidget = new et2_dataview_rowTemplateWidget(this._rootWidget,
_row[0]);
// Let the row widget create the widgets
rowWidget.createWidgets(mgrs, this._template.placeholders);
}
// Update the content of all other widgets
for (var i = 0; i < this._template.seperated.detachable.length; i++)
{
var entry = this._template.seperated.detachable[i];
// Parse the attribute expressions
var data = {};
for (var j = 0; j < entry.data.length; j++)
{
var set = entry.data[j];
data[set.attribute] = mgrs["content"].expandName(set.expression);
}
// Retrieve all DOM-Nodes
var nodes = new Array(entry.nodeFuncs.length);
for (var j = 0; j < nodes.length; j++)
{
// Use the previously compiled node function to get the node
// from the entry
nodes[j] = entry.nodeFuncs[j](_row[0]);
}
// Set the array managers first
entry.widget._mgrs = mgrs;
if (typeof data.id != "undefined")
{
entry.widget.id = data.id;
}
// Call the setDetachedAttributes function
entry.widget.setDetachedAttributes(nodes, data);
}
return rowWidget;
},
/* ---- PRIVATE FUNCTIONS ---- */
_createFullRowPrototype: function() {
var tr = $j(document.createElement("tr"));
var td = $j(document.createElement("td"))
.attr("span", this._columnIds.length)
.appendTo(tr);
var div = $j(document.createElement("div"))
.addClass(this._outerId + "_div_fullRow")
.appendTo(td);
this._prototypes["fullRow"] = tr;
},
_createDefaultPrototype: function() {
var tr = $j(document.createElement("tr"));
// Append a td for each column
for (var i = 0; i < this._columnIds.length; i++)
{
var td = $j(document.createElement("td"))
.addClass(this._outerId + "_td_" + this._columnIds[i])
.appendTo(tr);
var div = $j(document.createElement("div"))
.addClass(this._outerId + "_div_" + this._columnIds[i])
.addClass("innerContainer")
.appendTo(td);
}
this._prototypes["default"] = tr;
},
_createEmptyPrototype: function() {
this._prototypes["empty"] = $j(document.createElement("tr"));
}
});
var et2_dataview_rowWidget = et2_widget.extend(et2_IDOMNode, {
init: function(_mgrs, _row) {
// Call the parent constructor with some dummy attributes
this._super(null, {"id": "", "type": "rowWidget"});
// Initialize some variables
this._widgets = [];
// Copy the given DOM node and the content arrays
this._mgrs = _mgrs;
this._row = _row;
},
/**
* Copies the given array manager and clones the given widgets and inserts
* them into the row which has been passed in the constructor.
*/
createWidgets: function(_widgets) {
// Clone the given the widgets with this element as parent
this._widgets = new Array(_widgets.length);
for (var i = 0; i < _widgets.length; i++)
{
this._widgets[i] = _widgets[i].clone(this);
this._widgets[i].loadingFinished();
}
},
/**
* Returns the column node for the given sender
*/
getDOMNode: function(_sender) {
for (var i = 0; i < this._widgets.length; i++)
{
if (this._widgets[i] == _sender)
{
return this._row.childNodes[i].childNodes[0]; // Return the i-th td tag
}
}
return null;
}
});
var et2_dataview_rowTemplateWidget = et2_widget.extend(et2_IDOMNode, {
init: function(_mgrs, _row) {
// Call the parent constructor with some dummy attributes
this._super(null, {"id": "", "type": "rowTemplateWidget"});
// Copy the managers - do not use "setArrayMgrs" here
this._mgrs = _mgrs;
this._row = _row;
// Clone the widgets inside the placeholders array
this._widgets = [];
},
createWidgets: function(_mgrs, _widgets) {
// Set the array managers - don't use setArrayMgrs here as this creates
// an unnecessary copy of the object
this._mgrs = _mgrs;
this._widgets = new Array(_widgets.length);
for (var i = 0; i < _widgets.length; i++)
{
this._row.childNodes[0].childNodes[0];
this._widgets[i] = {
"widget": _widgets[i].widget.clone(this),
"node": _widgets[i].func(this._row)
};
this._widgets[i].widget.loadingFinished();
}
},
/**
* Returns the column node for the given sender
*/
getDOMNode: function(_sender) {
for (var i = 0; i < this._widgets.length; i++)
{
if (this._widgets[i].widget == _sender)
{
return this._widgets[i].node;
}
}
return null;
}
});