egroupware_official/etemplate/js/et2_core_widget.js

956 lines
24 KiB
JavaScript

/**
* EGroupware eTemplate2 - JS Widget base class
*
* @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
jsapi.egw;
et2_core_xml;
et2_core_common;
et2_core_inheritance;
et2_core_arrayMgr;
*/
/**
* The registry contains all XML tag names and the corresponding widget
* constructor.
*/
var et2_registry = {};
/**
* Registers the widget class defined by the given constructor and associates it
* with the types in the _types array.
*/
function et2_register_widget(_constructor, _types)
{
// Iterate over all given types and register those
for (var i = 0; i < _types.length; i++)
{
var type = _types[i].toLowerCase();
// Check whether a widget has already been registered for one of the
// types.
if (et2_registry[type])
{
egw.debug("warn", "Widget class registered for " + type +
" will be overwritten.");
}
et2_registry[type] = _constructor;
}
}
/**
* Creates a widget registered for the given tag-name. If "readonly" is listed
* inside the attributes, et2_createWidget will try to use the "_ro" type of the
* widget.
*
* @param _name is the name of the widget with which it is registered. If the
* widget is not found, an et2_placeholder will be created.
* @param _attrs is an associative array with attributes. If not passed, it will
* default to an empty object.
* @param _parent is the parent to which the element will be attached. If _parent
* is not passed, it will default to null. Then you have to attach the element
* to a parent using the addChild or insertChild method.
*/
function et2_createWidget(_name, _attrs, _parent)
{
if (typeof _attrs == "undefined")
{
_attrs = {};
}
if (typeof _parent == "undefined")
{
_parent = null;
}
// Parse the "readonly" and "type" flag for this element here, as they
// determine which constructor is used
var nodeName = _attrs["type"] = _name;
var readonly = _attrs["readonly"] =
typeof _attrs["readonly"] == "undefined" ? false : _attrs["readonly"];
// Get the constructor - if the widget is readonly, use the special "_ro"
// constructor if it is available
var constructor = typeof et2_registry[nodeName] == "undefined" ?
et2_placeholder : et2_registry[nodeName];
if (readonly && typeof et2_registry[nodeName + "_ro"] != "undefined")
{
constructor = et2_registry[nodeName + "_ro"];
}
// Do an sanity check for the attributes
constructor.prototype.generateAttributeSet(_attrs);
// Create the new widget and return it
return new constructor(_parent, _attrs);
}
/**
* The et2 widget base class.
*
* @augments Class
*/
var et2_widget = Class.extend(
{
attributes: {
"id": {
"name": "ID",
"type": "string",
"description": "Unique identifier of the widget"
},
"no_lang": {
"name": "No translation",
"type": "boolean",
"default": false,
"description": "If true, no translations are made for this widget"
},
/**
* Ignore the "span" property by default - it is read by the grid and
* other widgets.
*/
"span": {
"ignore": true
},
/**
* Ignore the "type" tag - it is read by the "createElementFromNode"
* function and passed as second parameter of the widget constructor
*/
"type": {
"name": "Widget type",
"type": "string",
"ignore": true,
"description": "What kind of widget this is"
},
/**
* Ignore the readonly tag by default - its also read by the
* "createElementFromNode" function.
*/
"readonly": {
"ignore": true
}
},
// Set the legacyOptions array to the names of the properties the "options"
// attribute defines.
legacyOptions: [],
/**
* Set this variable to true if this widget can have namespaces
*/
createNamespace: false,
/**
* The init function is the constructor of the widget. When deriving new
* classes from the widget base class, always call this constructor unless
* you know what you're doing.
*
* @param _parent is the parent object from the XML tree which contains this
* object. The default constructor always adds the new instance to the
* children list of the given parent object. _parent may be NULL.
* @param _attrs is an associative array of attributes.
* @memberOf et2_widget
*/
init: function(_parent, _attrs) {
// Check whether all attributes are available
if (typeof _parent == "undefined")
{
_parent = null;
}
if (typeof _attrs == "undefined")
{
_attrs = {};
}
// Initialize all important parameters
this._mgrs = {};
this._inst = null;
this._children = [];
this._type = _attrs["type"];
this.id = _attrs["id"];
// Add this widget to the given parent widget
if (_parent != null)
{
_parent.addChild(this);
}
// The supported widget classes array defines a whitelist for all widget
// classes or interfaces child widgets have to support.
this.supportedWidgetClasses = [et2_widget];
if (_attrs["id"])
{
// Create a namespace for this object
if (this.createNamespace)
{
this.checkCreateNamespace();
}
}
if(this.id)
{
this.id = this.id.replace(/\[/g,'&#x5B;').replace(/]/g,'&#x5D;');
}
// Add all attributes hidden in the content arrays to the attributes
// parameter
this.transformAttributes(_attrs);
// Create a local copy of the options object
this.options = et2_cloneObject(_attrs);
},
/**
* The destroy function destroys all children of the widget, removes itself
* from the parents children list.
* In all classes derrived from et2_widget ALWAYS override the destroy
* function and remove ALL references to other objects. Also remember to
* unbind ANY event this widget created and to remove all DOM-Nodes it
* created.
*/
destroy: function() {
// Call the destructor of all children
for (var i = this._children.length - 1; i >= 0; i--)
{
this._children[i].free();
}
// Remove this element from the parent, if it exists
if (typeof this._parent != "undefined" && this._parent !== null)
{
this._parent.removeChild(this);
}
// Free the array managers if they belong to this widget
for (var key in this._mgrs)
{
if (this._mgrs[key] && this._mgrs[key].owner == this)
{
this._mgrs[key].free();
}
}
},
/**
* Creates a copy of this widget. The parameters given are passed to the
* constructor of the copied object. If the parameters are omitted, _parent
* is defaulted to null
*/
clone: function(_parent) {
// Default _parent to null
if (typeof _parent == "undefined")
{
_parent = null;
}
// Create the copy
var copy = new (this.constructor)(_parent, this.options);
// Assign this element to the copy
copy.assign(this);
return copy;
},
assign: function(_obj) {
if (typeof _obj._children == "undefined")
{
this.egw().debug("log", "Foo!");
}
// Create a clone of all child elements of the given object
for (var i = 0; i < _obj._children.length; i++)
{
_obj._children[i].clone(this);
}
// Copy a reference to the content array manager
this.setArrayMgrs(_obj.mgrs);
},
/**
* Returns the parent widget of this widget
*/
getParent: function() {
return this._parent;
},
/**
* Returns the list of children of this widget.
*/
getChildren: function() {
return this._children;
},
/**
* Returns the base widget
*/
getRoot: function() {
if (this._parent != null)
{
return this._parent.getRoot();
}
else
{
return this;
}
},
/**
* Inserts an child at the end of the list.
*
* @param _node is the node which should be added. It has to be an instance
* of et2_widget
*/
addChild: function(_node) {
this.insertChild(_node, this._children.length);
},
/**
* Inserts a child at the given index.
*
* @param _node is the node which should be added. It has to be an instance
* of et2_widget
* @param _idx is the position at which the element should be added.
*/
insertChild: function(_node, _idx) {
// Check whether the node is one of the supported widget classes.
if (this.isOfSupportedWidgetClass(_node))
{
// Remove the node from its original parent
if (_node._parent)
{
_node._parent.removeChild(_node);
}
_node._parent = this;
this._children.splice(_idx, 0, _node);
if(_node.implements(et2_IDOMNode) && this.implements(et2_IDOMNode) && _node.parentNode)
{
_node.detachFromDOM();
_node.parentNode = this.getDOMNode(_node);
_node.attachToDOM();
}
}
else
{
this.egw().debug("error", "Widget " + _node._type +" is not supported by this widget class", this);
// throw("Widget is not supported by this widget class!");
}
},
/**
* Removes the child but does not destroy it.
*/
removeChild: function(_node) {
// Retrieve the child from the child list
var idx = this._children.indexOf(_node);
if (idx >= 0)
{
// This element is no longer parent of the child
_node._parent = null;
this._children.splice(idx, 1);
}
},
/**
* Searches an element by id in the tree, descending into the child levels.
*
* @param _id is the id you're searching for
*/
getWidgetById: function(_id) {
if (this.id == _id)
{
return this;
}
for (var i = 0; i < this._children.length; i++)
{
var elem = this._children[i].getWidgetById(_id);
if (elem != null)
{
return elem;
}
}
return null;
},
/**
* Function which allows iterating over the complete widget tree.
*
* @param _callback is the function which should be called for each widget
* @param _context is the context in which the function should be executed
* @param _type is an optional parameter which specifies a class/interface
* the elements have to be instanceOf.
*/
iterateOver: function(_callback, _context, _type) {
if (typeof _type == "undefined")
{
_type = et2_widget;
}
if (this.isInTree() && this.instanceOf(_type))
{
_callback.call(_context, this);
}
for (var i = 0; i < this._children.length; i++)
{
this._children[i].iterateOver(_callback, _context, _type);
}
},
/**
* Returns true if the widget currently resides in the visible part of the
* widget tree. E.g. Templates which have been cloned are not in the visible
* part of the widget tree.
*
* @param _vis can be used by widgets overwriting this function - simply
* write
* return this._super(inTree);
* when calling this function the _vis parameter does not have to be supplied.
*/
isInTree: function(_sender, _vis) {
if (typeof _vis == "undefined")
{
_vis = true;
}
if (this._parent)
{
return _vis && this._parent.isInTree(this);
}
return _vis;
},
isOfSupportedWidgetClass: function(_obj)
{
for (var i = 0; i < this.supportedWidgetClasses.length; i++)
{
if (_obj.instanceOf(this.supportedWidgetClasses[i]))
{
return true;
}
}
return false;
},
/**
* The parseXMLAttrs function takes an XML DOM attributes object
* and adds the given attributes to the _target associative array. This
* function also parses the legacyOptions.
*
* @param _attrsObj is the XML DOM attributes object
* @param _target is the object to which the attributes should be written.
*/
parseXMLAttrs: function(_attrsObj, _target, _proto) {
// Check whether the attributes object is really existing, if not abort
if (typeof _attrsObj == "undefined")
{
return;
}
// Iterate over the given attributes and parse them
var mgr = this.getArrayMgr("content");
for (var i = 0; i < _attrsObj.length; i++)
{
var attrName = _attrsObj[i].name;
var attrValue = _attrsObj[i].value;
// Special handling for the legacy options
if (attrName == "options" && _proto.legacyOptions.length > 0)
{
// Check for modifications on legacy options here. Normal modifications
// are handled in widget constructor, but it's too late for legacy options then
if(_target.id && this.getArrayMgr("modifications").getEntry(_target.id))
{
var mod = this.getArrayMgr("modifications").getEntry(_target.id);
if(typeof mod.options != "undefined") attrValue = _attrsObj[i].value = mod.options;
}
// Check for entire legacy options passed in content
if(attrValue.charAt(0) == '@' && attrValue.indexOf(',') == -1)
{
attrValue = mgr.expandName(attrValue);
}
// Parse the legacy options
var splitted = et2_csvSplit(attrValue);
for (var j = 0; j < splitted.length && j < _proto.legacyOptions.length; j++)
{
// Blank = not set
if(splitted[j].trim().length == 0) continue;
// Check to make sure we don't overwrite a current option with a legacy option
if(typeof _target[_proto.legacyOptions[j]] === "undefined")
{
attrValue = splitted[j];
/**
If more legacy options than expected, stuff them all in the last legacy option
Some legacy options take a comma separated list.
*/
if(j == _proto.legacyOptions.length - 1 && splitted.length > _proto.legacyOptions.length)
{
attrValue = splitted.slice(j);
}
var attr = _proto.attributes[_proto.legacyOptions[j]];
// If the attribute is marked as boolean, parse the
// expression as bool expression.
if (attr.type == "boolean")
{
attrValue = mgr.parseBoolExpression(attrValue);
}
else if (typeof attrValue != "object")
{
attrValue = mgr.expandName(attrValue);
}
_target[_proto.legacyOptions[j]] = attrValue;
}
}
}
else
{
if (mgr != null && typeof _proto.attributes[attrName] != "undefined")
{
var attr = _proto.attributes[attrName];
// If the attribute is marked as boolean, parse the
// expression as bool expression.
if (attr.type == "boolean")
{
attrValue = mgr.parseBoolExpression(attrValue);
}
else
{
attrValue = mgr.expandName(attrValue);
}
}
// Set the attribute
_target[attrName] = attrValue;
}
}
},
/**
* Apply the "modifications" to the element and translate attributes marked
* with "translate: true"
*/
transformAttributes: function(_attrs) {
// Apply the content of the modifications array
if (this.id)
{
if (typeof this.id != "string")
{
console.log(this.id);
}
if(this.getArrayMgr("modifications"))
{
var data = this.getArrayMgr("modifications").getEntry(this.id);
// Check for already inside namespace
if(this.createNamespace && this.getArrayMgr("modifications").perspectiveData.owner == this)
{
data = this.getArrayMgr("modifications").data;
}
if (typeof data === 'object')
{
for (var key in data)
{
_attrs[key] = data[key];
}
}
}
}
// Translate the attributes
for (var key in _attrs)
{
if (_attrs[key] && typeof this.attributes[key] != "undefined")
{
if (this.attributes[key].translate === true ||
(this.attributes[key].translate === "!no_lang" && !_attrs["no_lang"]))
{
_attrs[key] = this.egw().lang(_attrs[key]);
}
}
}
},
/**
* Create a et2_widget from an XML node.
*
* First the type and attributes are read from the node. Then the readonly & modifications
* arrays are checked for changes specific to the loaded data. Then the appropriate
* constructor is called. After the constructor returns, the widget has a chance to
* further initialize itself from the XML node when the widget's loadFromXML() method
* is called with the node.
*
* @param _node XML node to read
*
* @return et2_widget
*/
createElementFromNode: function(_node) {
var attributes = {};
// Parse the "readonly" and "type" flag for this element here, as they
// determine which constructor is used
var _nodeName = attributes["type"] = _node.getAttribute("type") ?
_node.getAttribute("type") : _node.nodeName.toLowerCase();
var readonly = attributes["readonly"] =
this.getArrayMgr("readonlys").isReadOnly(
_node.getAttribute("id"), _node.getAttribute("readonly"),
this.readonly);
// Check to see if modifications change type
var modifications = this.getArrayMgr("modifications");
if(modifications && _node.getAttribute("id")) {
var entry = modifications.getEntry(_node.getAttribute("id"));
if(entry == null)
{
// Try again, but skip the fancy stuff
// TODO: Figure out why the getEntry() call doesn't always work
var entry = modifications.data[_node.getAttribute("id")];
if(entry) this.egw().debug("warn", "getEntry("+_node.getAttribute("id")+") failed, but the data is there.", modifications, entry);
}
if(entry && entry.type)
{
_nodeName = attributes["type"] = entry.type;
}
entry = null;
}
// Get the constructor - if the widget is readonly, use the special "_ro"
// constructor if it is available
var constructor = typeof et2_registry[_nodeName] == "undefined" ?
et2_placeholder : et2_registry[_nodeName];
if (readonly && typeof et2_registry[_nodeName + "_ro"] != "undefined")
{
constructor = et2_registry[_nodeName + "_ro"];
}
// Parse the attributes from the given XML attributes object
this.parseXMLAttrs(_node.attributes, attributes, constructor.prototype);
// check if parseXMLAttrs gives a different type attribute eg. type="@${row}[type]"
if (attributes.type && attributes.type != _nodeName)
{
// set _nodeName and constructor accordingly
_nodeName = attributes.type;
constructor = typeof et2_registry[_nodeName] == "undefined" ?
et2_placeholder : et2_registry[_nodeName];
if (readonly && typeof et2_registry[_nodeName + "_ro"] != "undefined")
{
constructor = et2_registry[_nodeName + "_ro"];
}
}
// Do an sanity check for the attributes
constructor.prototype.generateAttributeSet(attributes);
// Creates the new widget, passes this widget as an instance and
// passes the widgetType. Then it goes on loading the XML for it.
var widget = new constructor(this, attributes);
// Load the widget itself from XML
widget.loadFromXML(_node);
return widget;
},
/**
* Loads the widget tree from an XML node
*/
loadFromXML: function(_node) {
// Load the child nodes.
for (var i = 0; i < _node.childNodes.length; i++)
{
var node = _node.childNodes[i];
var widgetType = node.nodeName.toLowerCase();
if (widgetType == "#comment")
{
continue;
}
if (widgetType == "#text")
{
if (node.data.replace(/^\s+|\s+$/g, ''))
{
this.loadContent(node.data);
}
continue;
}
// Create the new element
this.createElementFromNode(node);
}
},
/**
* Called whenever textNodes are loaded from the XML tree
*/
loadContent: function(_content) {
},
/**
* Called when loading the widget (sub-tree) is finished. First when this
* function is called, the DOM-Tree is created. loadingFinished is
* recursively called for all child elements. Do not directly override this
* function but the doLoadingFinished function which is executed before
* descending deeper into the DOM-Tree
*/
loadingFinished: function() {
// Call all availble setters
this.initAttributes(this.options);
if (this.doLoadingFinished())
{
// Descend recursively into the tree
for (var i = 0; i < this._children.length; i++)
{
try
{
this._children[i].loadingFinished();
}
catch (e)
{
egw.debug("error", "There was an error with a widget:\nError:%o\nProblem widget:%o",e.message,this._children[i],e.stack);
}
}
}
},
/**
* 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.
*
* Overwritten here to compile legacy JS code in attributes of type "js"
*/
initAttributes: function(_attrs) {
for (var key in _attrs)
{
if (typeof this.attributes[key] != "undefined" && !this.attributes[key].ignore && !(_attrs[key] == undefined))
{
var val = _attrs[key];
// compile string values of attribute type "js" to functions
if (this.attributes[key].type == 'js' && typeof _attrs[key] == 'string')
{
val = et2_compileLegacyJS(val, this,
this.instanceOf(et2_inputWidget) ? this.getInputNode() :
(this.implements(et2_IDOMNode) ? this.getDOMNode() : null));
}
this.setAttribute(key, val, false);
}
}
},
doLoadingFinished: function() {
return true;
},
/**
* The egw function returns the instance of the client side api belonging
* to this widget tree. The api instance can be set in the "container"
* widget using the setApiInstance function.
*/
egw: function() {
// The _egw property is not set
if (typeof this._egw === 'undefined')
{
if (this._parent != null)
{
return this._parent.egw();
}
// Get the window this object belongs to
var wnd = null;
if (this.implements(et2_IDOMNode))
{
var node = this.getDOMNode();
if(node && node.ownerDocument)
{
wnd = node.ownerDocument.parentNode || node.ownerDocument.defaultView;
}
}
// If we're the root object, return the phpgwapi API instance
return egw('phpgwapi', wnd);
}
return this._egw;
},
/**
* Sets the client side api instance. It can be retrieved by the widget tree
* by using the "egw()" function.
*/
setApiInstance: function(_egw) {
this._egw = _egw;
},
/**
* Sets all array manager objects - this function can be used to set the
* root array managers of the container object.
*/
setArrayMgrs: function(_mgrs) {
this._mgrs = et2_cloneObject(_mgrs);
},
/**
* Returns an associative array containing the top-most array managers.
*
* @param _mgrs is used internally and should not be supplied.
*/
getArrayMgrs: function(_mgrs) {
if (typeof _mgrs == "undefined")
{
_mgrs = {};
}
// Add all managers of this object to the result, if they have not already
// been set in the result
for (var key in this._mgrs)
{
if (typeof _mgrs[key] == "undefined")
{
_mgrs[key] = this._mgrs[key];
}
}
// Recursively applies this function to the parent widget
if (this._parent)
{
this._parent.getArrayMgrs(_mgrs);
}
return _mgrs;
},
/**
* Sets the array manager for the given part
*/
setArrayMgr: function(_part, _mgr) {
this._mgrs[_part] = _mgr;
},
/**
* Returns the array manager object for the given part
*/
getArrayMgr: function(_part) {
if (typeof this._mgrs[_part] != "undefined")
{
return this._mgrs[_part];
}
else if (this._parent)
{
return this._parent.getArrayMgr(_part);
}
return null;
},
/**
* Checks whether a namespace exists for this element in the content array.
* If yes, an own perspective of the content array is created. If not, the
* parent content manager is used.
*/
checkCreateNamespace: function() {
// Get the content manager
var mgrs = this.getArrayMgrs();
for (var key in mgrs)
{
var mgr = mgrs[key];
// Get the original content manager if we have already created a
// perspective for this node
if (typeof this._mgrs[key] != "undefined" && mgr.perspectiveData.owner == this)
{
mgr = mgr.parentMgr;
}
// Check whether the manager has a namespace for the id of this object
var entry = mgr.getEntry(this.id);
if (typeof entry === 'object' && entry !== null||this.id )
{
// The content manager has an own node for this object, so
// create an own perspective.
this._mgrs[key] = mgr.openPerspective(this, this.id);
}
else
{
// The current content manager does not have an own namespace for
// this element, so use the content manager of the parent.
delete(this._mgrs[key]);
}
}
},
/**
* Sets the instance manager object (of type etemplate2, see etemplate2.js)
*/
setInstanceManager: function(_inst) {
this._inst = _inst;
},
/**
* Returns the instance manager
*/
getInstanceManager: function() {
if (this._inst != null)
{
return this._inst;
}
else if (this._parent)
{
return this._parent.getInstanceManager();
}
return null;
},
/**
* Returns the path into the data array. By default, array manager takes care of
* this, but some extensions need to override this
*/
getPath: function() {
return this.getArrayMgr("content").getPath();
}
});