egroupware/etemplate/js/et2_core_DOMWidget.js

708 lines
17 KiB
JavaScript

/**
* EGroupware eTemplate2 - JS DOM Widget 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
et2_core_interfaces;
et2_core_widget;
/phpgwapi/js/egw_action/egw_action.js;
*/
/**
* Abstract widget class which can be inserted into the DOM. All widget classes
* deriving from this class have to care about implementing the "getDOMNode"
* function which has to return the DOM-Node.
*
* @augments et2_widget
*/
var et2_DOMWidget = et2_widget.extend(et2_IDOMNode,
{
attributes: {
"disabled": {
"name": "Disabled",
"type": "boolean",
"description": "Defines whether this widget is visible. Not to be confused with an input widget's HTML attribute 'disabled'.",
"default": false
},
"width": {
"name": "Width",
"type": "dimension",
"default": et2_no_init,
"description": "Width of the element in pixels, percentage or 'auto'"
},
"height": {
"name": "Height",
"type": "dimension",
"default": et2_no_init,
"description": "Height of the element in pixels, percentage or 'auto'"
},
"class": {
"name": "CSS Class",
"type": "string",
"default": et2_no_init,
"description": "CSS Class which is applied to the dom element of this node"
},
"overflow": {
"name": "Overflow",
"type": "string",
"default": et2_no_init,
"description": "If set, the css-overflow attribute is set to that value"
},
"parent_node": {
"name": "DOM parent",
"type": "string",
"default": et2_no_init,
"description": "Insert into the target DOM node instead of the normal location"
},
"actions": {
"name": "Actions list",
"type": "any",
"default": et2_no_init,
"description": "List of egw actions that can be done on the widget. This includes context menu, drag and drop. TODO: Link to action documentation"
},
},
/**
* When the DOMWidget is initialized, it grabs the DOM-Node of the parent
* object (if available) and passes it to its own "createDOMNode" function
*
* @memberOf et2_DOMWidget
*/
init: function() {
// Call the inherited constructor
this._super.apply(this, arguments);
this.parentNode = null;
this._attachSet = {
"node": null,
"parent": null
};
this.disabled = false;
this._surroundingsMgr = null;
},
/**
* Detatches the node from the DOM and clears all references to the parent
* node or the dom node of this widget.
*/
destroy: function() {
this.detatchFromDOM();
this.parentNode = null;
this._attachSet = {};
if (this._surroundingsMgr)
{
this._surroundingsMgr.free();
this._surroundingsMgr = null;
}
this._super();
},
/**
* Attaches the container node of this widget to the DOM-Tree
*/
doLoadingFinished: function() {
// Check whether the parent implements the et2_IDOMNode interface. If
// yes, grab the DOM node and create our own.
if (this._parent && this._parent.implements(et2_IDOMNode)) {
if(this.options.parent_node)
{
this.set_parent_node(this.options.parent_node);
}
else
{
this.setParentDOMNode(this._parent.getDOMNode(this));
}
}
return true;
},
/**
* Detaches the widget from the DOM tree, if it had been attached to the
* DOM-Tree using the attachToDOM method.
*/
detatchFromDOM: function() {
if (this._attachSet.node && this._attachSet.parent)
{
// Remove the current node from the parent node
this._attachSet.parent.removeChild(this._attachSet.node);
// Reset the "attachSet"
this._attachSet = {
"node": null,
"parent": null
};
return true;
}
return false;
},
/**
* Attaches the widget to the DOM tree. Fails if the widget is already
* attached to the tree or no parent node or no node for this widget is
* defined.
*/
attachToDOM: function() {
// Attach the DOM node of this widget (if existing) to the new parent
var node = this.getDOMNode(this);
if (node && this.parentNode &&
(node != this._attachSet.node ||
this.parentNode != this._attachSet.parent))
{
// If the surroundings manager exists, surround the DOM-Node of this
// widget with the DOM-Nodes inside the surroundings manager.
if (this._surroundingsMgr)
{
node = this._surroundingsMgr.getDOMNode(node);
}
// Append this node at its index
var idx = this.getDOMIndex();
if (idx < 0 || idx >= this.parentNode.childNodes.length - 1)
{
this.parentNode.appendChild(node);
}
else
{
this.parentNode.insertBefore(node, this.parentNode.childNodes[idx]);
}
// Store the currently attached nodes
this._attachSet = {
"node": node,
"parent": this.parentNode
};
return true;
}
return false;
},
isAttached: function() {
return this.parentNode != null;
},
getSurroundings: function() {
if (!this._surroundingsMgr)
{
this._surroundingsMgr = new et2_surroundingsMgr(this);
}
return this._surroundingsMgr;
},
/**
* Set the parent DOM node of this element. Takes a wider variety of types
* than setParentDOMNode(), and matches the set_<attribute> naming convention.
*
* @param _node String|DOMNode DOM node to contain the widget, or the ID of the DOM node.
*/
set_parent_node: function(_node) {
if(typeof _node == "string")
{
this.setParentDOMNode($j('#'+_node).get(0));
}
else
{
this.setParentDOMNode(_node);
}
},
/**
* Set the parent DOM node of this element. If another parent node is already
* set, this widget removes itself from the DOM tree
*/
setParentDOMNode: function(_node) {
if (_node != this.parentNode)
{
// Detatch this element from the DOM tree
this.detatchFromDOM();
this.parentNode = _node;
// And attatch the element to the DOM tree
this.attachToDOM();
}
},
/**
* Returns the parent node.
*/
getParentDOMNode: function() {
return this.parentNode;
},
/**
* Returns the index of this element in the DOM tree
*/
getDOMIndex: function() {
if (this._parent)
{
var idx = 0;
var children = this._parent.getChildren();
for (var i = 0; i < children.length; i++)
{
if (children[i] == this)
{
return idx;
}
else if (children[i].isInTree())
{
idx++;
}
}
}
return -1;
},
/**
* Sets the id of the DOM-Node.
*/
set_id: function(_value) {
this.id = _value;
var node = this.getDOMNode(this);
if (node)
{
if (_value != "")
{
node.setAttribute("id", _value);
}
else
{
node.removeAttribute("id");
}
}
},
set_disabled: function(_value) {
var node = this.getDOMNode(this);
if (node && this.disabled != _value)
{
this.disabled = _value;
if (_value)
{
$j(node).hide();
}
else
{
$j(node).show();
}
}
},
set_width: function(_value) {
this.width = _value;
var node = this.getDOMNode(this);
if (node)
{
$j(node).css("width", _value);
}
},
set_height: function(_value) {
this.height = _value;
var node = this.getDOMNode(this);
if (node)
{
$j(node).css("height", _value);
}
},
set_class: function(_value) {
var node = this.getDOMNode(this);
if (node)
{
if (this["class"])
{
$j(node).removeClass(this["class"]);
}
$j(node).addClass(_value);
}
this["class"] = _value;
},
set_overflow: function(_value) {
this.overflow = _value;
var node = this.getDOMNode(this);
if (node)
{
$j(node).css("overflow", _value);
}
},
/**
* Set Actions on the widget
*
* Each action is defined as an object:
*
* move: {
* type: "drop",
* acceptedTypes: "mail",
* icon: "move",
* caption: "Move to"
* onExecute: javascript:mail_move"
* }
*
* This will turn the widget into a drop target for "mail" drag types. When "mail" drag types are dropped,
* the global function mail_move(egwAction action, egwActionObject sender) will be called. The ID of the
* dragged "mail" will be in sender.id, some information about the sender will be in sender.context. The
* etemplate2 widget involved can typically be found in action.parent.data.widget, so your handler
* can operate in the widget context easily. The location varies depending on your action though. It
* might be action.parent.parent.data.widget
*
* To customise how the actions are handled for a particular widget, override _link_actions(). It handles
* the more widget-specific parts.
*
* @param Object {ID: {attributes..}+} map of egw action information
* @see etemplate/inc/class.etemplate_widget_nextmatch->egw_actions()
*/
set_actions: function(actions)
{
if(this.id == "" || typeof this.id == "undefined")
{
this.egw().debug("warn", "Widget should have an ID if you want actions",this);
return;
}
// Initialize the action manager and add some actions to it
var gam = egw_getAppActionManager();
this._actionManager = gam.addAction("actionManager", this.id);
// ActionManager wants an array
var parsed_actions = [];
if(typeof actions == "object" && actions)
{
for(var key in actions)
{
actions[key].id = key;
if(typeof actions[key].icon != "undefined" && actions[key].icon)
{
actions[key].iconUrl = this.egw().image(actions[key].icon);
}
parsed_actions.push(actions[key]);
}
}
else
{
parsed_actions = actions;
}
this._actionManager.updateActions(parsed_actions);
// Put a reference to the widget into the action stuff, so we can
// easily get back to widget context from the action handler
this._actionManager.data = {widget: this};
// Link the actions to the DOM
this._link_actions(parsed_actions);
},
/**
* Link the actions to the DOM nodes / widget bits.
*
*/
_link_actions: function(parsed_actions)
{
// Get the top level element for the tree
var objectManager = egw_getAppObjectManager(true);
var widget_object = objectManager.getObjectById(this.id);
if (widget_object == null) {
// Add a new container to the object manager which will hold the widget
// objects
widget_object = objectManager.addObject(this.id, new et2_action_object_impl(this));
}
// Delete all old objects
widget_object.clear();
// Go over the widget & add links - this is where we decide which actions are
// 'allowed' for this widget at this time
var action_links = [];
for(var i = 0; i < parsed_actions.length; i++)
{
action_links.push(parsed_actions[i].id);
}
widget_object.updateActionLinks(action_links);
}
});
/**
* The surroundings manager class allows to append or prepend elements around
* an widget node.
*
* @augments Class
*/
var et2_surroundingsMgr = Class.extend(
{
/**
* Constructor
*
* @memberOf et2_surroundingsMgr
* @param _widget
*/
init: function(_widget) {
this.widget = _widget;
this._widgetContainer = null;
this._widgetSurroundings = [];
this._widgetPlaceholder = null;
this._widgetNode = null;
this._ownPlaceholder = true;
},
destroy: function() {
this._widgetContainer = null;
this._widgetSurroundings = null;
this._widgetPlaceholder = null;
this._widgetNode = null;
},
prependDOMNode: function(_node) {
this._widgetSurroundings.unshift(_node);
this._surroundingsUpdated = true;
},
appendDOMNode: function(_node) {
// Append an placeholder first if none is existing yet
if (this._ownPlaceholder && this._widgetPlaceholder == null)
{
this._widgetPlaceholder = document.createElement("span");
this._widgetSurroundings.push(this._widgetPlaceholder);
}
// Append the given node
this._widgetSurroundings.push(_node);
this._surroundingsUpdated = true;
},
insertDOMNode: function(_node) {
if (!this._ownPlaceholder || this._widgetPlaceholder == null)
{
this.appendDOMNode(_node);
return;
}
// Get the index of the widget placeholder and delete it, insert the
// given node instead
var idx = this._widgetSurroundings.indexOf(this._widgetPlaceholder);
this._widgetSurroundings.splice(idx, 1, _node);
// Delete the reference to the own placeholder
this._widgetPlaceholder = null;
this._ownPlaceholder = false;
},
removeDOMNode: function(_node) {
for (var i = 0; i < this._widgetSurroundings.length; i++)
{
if (this._widgetSurroundings[i] == _node)
{
this._widgetSurroundings.splice(i, 1);
this._surroundingsUpdated = true;
break;
}
}
},
setWidgetPlaceholder: function(_node) {
if (_node != this._widgetPlaceholder)
{
if (_node != null && this._ownPlaceholder && this._widgetPlaceholder != null)
{
// Delete the current placeholder which was created by the
// widget itself
var idx = this._widgetSurroundings.indexOf(this._widgetPlaceholder);
this._widgetSurroundings.splice(idx, 1);
// Delete any reference to the own placeholder and set the
// _ownPlaceholder flag to false
this._widgetPlaceholder = null;
this._ownPlaceholder = false;
}
this._ownPlaceholder = (_node == null);
this._widgetPlaceholder = _node;
this._surroundingsUpdated = true;
}
},
_rebuildContainer: function() {
// Return if there has been no change in the "surroundings-data"
if (!this._surroundingsUpdated)
{
return false;
}
// Build the widget container
if (this._widgetSurroundings.length > 0)
{
// Check whether the widgetPlaceholder is really inside the DOM-Tree
var hasPlaceholder = et2_hasChild(this._widgetSurroundings,
this._widgetPlaceholder);
// If not, append another widget placeholder
if (!hasPlaceholder)
{
this._widgetPlaceholder = document.createElement("span");
this._widgetSurroundings.push(this._widgetPlaceholder);
this._ownPlaceholder = true;
}
// If the surroundings array only contains one element, set this one
// as the widget container
if (this._widgetSurroundings.length == 1)
{
if (this._widgetSurroundings[0] == this._widgetPlaceholder)
{
this._widgetContainer = null;
}
else
{
this._widgetContainer = this._widgetSurroundings[0];
}
}
else
{
// Create an outer "span" as widgetContainer
this._widgetContainer = document.createElement("span");
// Append the children inside the widgetSurroundings array to
// the widget container
for (var i = 0; i < this._widgetSurroundings.length; i++)
{
this._widgetContainer.appendChild(this._widgetSurroundings[i]);
}
}
}
else
{
this._widgetContainer = null;
this._widgetPlaceholder = null;
}
this._surroundingsUpdated = false;
return true;
},
update: function() {
if (this._surroundingsUpdated)
{
var attached = this.widget ? this.widget.isAttached() : false;
// Reattach the widget - this will call the "getDOMNode" function
// and trigger the _rebuildContainer function.
if (attached && this.widget)
{
this.widget.detatchFromDOM();
this.widget.attachToDOM();
}
}
},
getDOMNode: function(_widgetNode) {
// Update the whole widgetContainer if this is not the first time this
// function has been called but the widget node has changed.
if (this._widgetNode != null && this._widgetNode != _widgetNode)
{
this._surroundingsUpdated = true;
}
// Copy a reference to the given node
this._widgetNode = _widgetNode;
// Build the container if it didn't exist yet.
var updated = this._rebuildContainer();
// Return the widget node itself if there are no surroundings arround
// it
if (this._widgetContainer == null)
{
return _widgetNode;
}
// Replace the widgetPlaceholder with the given widget node if the
// widgetContainer has been updated
if (updated)
{
this._widgetPlaceholder.parentNode.replaceChild(_widgetNode,
this._widgetPlaceholder);
if (!this._ownPlaceholder)
{
this._widgetPlaceholder = _widgetNode;
}
}
// Return the widget container
return this._widgetContainer;
}
});
/**
* The egw_action system requires an egwActionObjectInterface Interface implementation
* to tie actions to DOM nodes. This one can be used by any widget.
*
* The class extension is different than the widgets
*
*/
function et2_action_object_impl(widget)
{
var aoi = new egwActionObjectInterface();
aoi.doGetDOMNode = function() {
return widget.getDOMNode();
};
// _outerCall may be used to determine, whether the state change has been
// evoked from the outside and the stateChangeCallback has to be called
// or not.
aoi.doSetState = function(_state, _outerCall) {
};
// The doTiggerEvent function may be overritten by the aoi if it wants to
// support certain action implementation specific events like EGW_AI_DRAG_OVER
// or EGW_AI_DRAG_OUT
aoi.doTriggerEvent = function(_event, _data) {
switch(_event)
{
case EGW_AI_DRAG_OVER:
$j(this.node).addClass("ui-state-active");
break;
case EGW_AI_DRAG_OUT:
$j(this.node).removeClass("ui-state-active");
break;
}
};
return aoi;
};