forked from extern/egroupware
401 lines
9.4 KiB
JavaScript
401 lines
9.4 KiB
JavaScript
/**
|
|
* EGroupware eTemplate2 - dataview code
|
|
*
|
|
* @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 2012
|
|
* @version $Id$
|
|
*/
|
|
|
|
"use strict"
|
|
|
|
/*egw:uses
|
|
jquery.jquery;
|
|
et2_dataview_interfaces;
|
|
*/
|
|
|
|
/**
|
|
* The et2_dataview_container class is the main object each dataview consits of.
|
|
* Each row, spacer as well as the grid itself are containers. A container is
|
|
* described by its parent element and a certain height. On the DOM-Level a
|
|
* container may consist of multiple "tr" nodes, which are treated as a unit.
|
|
* Some containers (like grid containers) are capable of managing a set of child
|
|
* containers. Each container can indicate, that it thinks that it's height
|
|
* might have changed. In that case it informs its parent element about that.
|
|
* The only requirement for the parent element is, that it implements the
|
|
* et2_dataview_IInvalidatable interface.
|
|
* A container does not know where it resides inside the grid, or whether it is
|
|
* currently visible or not -- this information is efficiently managed by the
|
|
* et2_dataview_grid container.
|
|
*
|
|
* @augments Class
|
|
*/
|
|
var et2_dataview_container = Class.extend(et2_dataview_IInvalidatable,
|
|
{
|
|
/**
|
|
* Initializes the container object.
|
|
*
|
|
* @param _parent is an object which implements the IInvalidatable
|
|
* interface. _parent may not be null.
|
|
* @memberOf et2_dataview_container
|
|
*/
|
|
init: function(_parent) {
|
|
// Copy the given invalidation element
|
|
this._parent = _parent;
|
|
|
|
this._nodes = []; // contains all DOM-Nodes this container exists of
|
|
this._inTree = false; //
|
|
this._attachData = {"node": null, "prepend": false};
|
|
this._destroyCallback = null;
|
|
this._destroyContext = null;
|
|
|
|
this._height = false;
|
|
this._index = 0;
|
|
this._top = 0;
|
|
},
|
|
|
|
/**
|
|
* Destroys this container. Classes deriving from et2_dataview_container
|
|
* should override this method and take care of unregistering all event
|
|
* handlers etc.
|
|
*/
|
|
destroy: function() {
|
|
// Remove the nodes from the tree
|
|
this.removeFromTree();
|
|
|
|
// Call the callback function (if one is registered)
|
|
if (this._destroyCallback)
|
|
{
|
|
this._destroyCallback.call(this._destroyContext, this);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Sets the "destroyCallback" -- the given function gets called whenever
|
|
* the container is destroyed. This instance is passed as an parameter to
|
|
* the callback.
|
|
*/
|
|
setDestroyCallback: function(_callback, _context) {
|
|
this._destroyCallback = _callback;
|
|
this._destroyContext = _context;
|
|
},
|
|
|
|
/**
|
|
* Inserts all container nodes into the DOM tree after or before the given
|
|
* element.
|
|
*
|
|
* @param _node is the node after/before which the container "tr"s should
|
|
* get inserted. _node should be a simple DOM node, not a jQuery object.
|
|
* @param _prepend specifies whether the container should be inserted before
|
|
* or after the given node. Inserting before is needed for inserting the
|
|
* first element in front of an spacer.
|
|
*/
|
|
insertIntoTree: function(_node, _prepend) {
|
|
|
|
if (!this._inTree && _node != null && this._nodes.length > 0)
|
|
{
|
|
// Store the parent node and indicate that this element is now in
|
|
// the tree.
|
|
this._attachData = {"node": _node, "prepend": _prepend};
|
|
this._inTree = true;
|
|
|
|
for (var i = 0; i < this._nodes.length; i++)
|
|
{
|
|
if (i == 0)
|
|
{
|
|
if (_prepend)
|
|
{
|
|
_node.before(this._nodes[0]);
|
|
}
|
|
else
|
|
{
|
|
_node.after(this._nodes[0]);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Insert all following nodes after the previous node
|
|
this._nodes[i - 1].after(this._nodes[i]);
|
|
}
|
|
}
|
|
|
|
// Invalidate this element in order to update the height of the
|
|
// parent
|
|
this.invalidate();
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Removes all container nodes from the tree.
|
|
*/
|
|
removeFromTree: function() {
|
|
if (this._inTree)
|
|
{
|
|
// Call the jQuery remove function to remove all nodes from the tree
|
|
// again.
|
|
for (var i = 0; i < this._nodes.length; i++)
|
|
{
|
|
this._nodes[i].remove();
|
|
}
|
|
|
|
// Reset the "attachData"
|
|
this._inTree = false;
|
|
this._attachData = {"node": null, "prepend": false};
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Appends a node to the container.
|
|
*
|
|
* @param _node is the DOM-Node which should be appended.
|
|
*/
|
|
appendNode: function(_node) {
|
|
// Add the given node to the "nodes" array
|
|
this._nodes.push(_node);
|
|
|
|
// If the container is already in the tree, attach the given node to the
|
|
// tree.
|
|
if (this._inTree)
|
|
{
|
|
if (this._nodes.length === 1)
|
|
{
|
|
if (this._attachData.prepend)
|
|
{
|
|
this._attachData.node.before(_node);
|
|
}
|
|
else
|
|
{
|
|
this._attachData.node.after(_node);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
this._nodes[this._nodes.length - 2].after(_node);
|
|
}
|
|
|
|
this.invalidate();
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Removes a certain node from the container
|
|
*/
|
|
removeNode: function(_node) {
|
|
// Get the index of the node in the nodes array
|
|
var idx = this._nodes.indexOf(_node);
|
|
|
|
if (idx >= 0)
|
|
{
|
|
// Remove the node if the container is currently attached
|
|
if (this._inTree)
|
|
{
|
|
_node.parentNode.removeChild(_node);
|
|
}
|
|
|
|
// Remove the node from the nodes array
|
|
this._nodes.splice(idx, 1);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Returns the last node of the container - new nodes have to be appended
|
|
* after it.
|
|
*/
|
|
getLastNode: function() {
|
|
|
|
if (this._nodes.length > 0)
|
|
{
|
|
return this._nodes[this._nodes.length - 1];
|
|
}
|
|
|
|
return null;
|
|
},
|
|
|
|
/**
|
|
* Returns the first node of the container.
|
|
*/
|
|
getFirstNode: function() {
|
|
return this._nodes.length > 0 ? this._nodes[0] : null;
|
|
},
|
|
|
|
/**
|
|
* Returns the accumulated height of all container nodes. Only visible nodes
|
|
* (without "display: none" etc.) are taken into account.
|
|
*/
|
|
getHeight: function() {
|
|
if (this._height === false && this._inTree)
|
|
{
|
|
this._height = 0;
|
|
|
|
// Increment the height value for each visible container node
|
|
for (var i = 0; i < this._nodes.length; i++)
|
|
{
|
|
if (this._isVisible(this._nodes[i][0]))
|
|
{
|
|
this._height += this._nodeHeight(this._nodes[i][0]);
|
|
}
|
|
}
|
|
}
|
|
|
|
return this._height === false ? 0 : this._height;
|
|
},
|
|
|
|
/**
|
|
* Returns a datastructure containing information used for calculating the
|
|
* average row height of a grid.
|
|
* The datastructure has the
|
|
* {
|
|
* avgHeight: <the calculated average height of this element>,
|
|
* avgCount: <the element count this calculation was based on>
|
|
* }
|
|
*/
|
|
getAvgHeightData: function() {
|
|
return {
|
|
"avgHeight": this.getHeight(),
|
|
"avgCount": 1
|
|
};
|
|
},
|
|
|
|
/**
|
|
* Returns the previously set "pixel top" of the container.
|
|
*/
|
|
getTop: function() {
|
|
return this._top;
|
|
},
|
|
|
|
/**
|
|
* Returns the "pixel bottom" of the container.
|
|
*/
|
|
getBottom: function() {
|
|
return this._top + this.getHeight();
|
|
},
|
|
|
|
/**
|
|
* Returns the range of the element.
|
|
*/
|
|
getRange: function() {
|
|
return et2_bounds(this.getTop(), this.getBottom());
|
|
},
|
|
|
|
/**
|
|
* Returns the index of the element.
|
|
*/
|
|
getIndex: function() {
|
|
return this._index;
|
|
},
|
|
|
|
/**
|
|
* Returns how many elements this container represents.
|
|
*/
|
|
getCount: function() {
|
|
return 1;
|
|
},
|
|
|
|
/**
|
|
* Sets the top of the element.
|
|
*/
|
|
setTop: function(_value) {
|
|
this._top = _value;
|
|
},
|
|
|
|
/**
|
|
* Sets the index of the element.
|
|
*/
|
|
setIndex: function(_value) {
|
|
this._index = _value;
|
|
},
|
|
|
|
/* -- et2_dataview_IInvalidatable -- */
|
|
|
|
/**
|
|
* Broadcasts an invalidation through the container tree. Marks the own
|
|
* height as invalid.
|
|
*/
|
|
invalidate: function() {
|
|
// Abort if this element is already marked as invalid.
|
|
if (this._height !== false)
|
|
{
|
|
// Delete the own, probably computed height
|
|
this._height = false;
|
|
|
|
// Broadcast the invalidation to the parent element
|
|
this._parent.invalidate();
|
|
}
|
|
},
|
|
|
|
|
|
/* -- PRIVATE FUNCTIONS -- */
|
|
|
|
|
|
/**
|
|
* Used to check whether an element is visible or not (non recursive).
|
|
*
|
|
* @param _obj is the element which should be checked for visibility, it is
|
|
* only checked whether some stylesheet makes the element invisible, not if
|
|
* the given object is actually inside the DOM.
|
|
*/
|
|
_isVisible: function(_obj) {
|
|
|
|
// Check whether the element is localy invisible
|
|
if (_obj.style && (_obj.style.display === "none"
|
|
|| _obj.style.visiblity === "none"))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
// Get the computed style of the element
|
|
var style = window.getComputedStyle ? window.getComputedStyle(_obj, null)
|
|
: _obj.currentStyle;
|
|
if (style.display === "none" || style.visibility === "none")
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
});
|
|
|
|
/**
|
|
* Returns the height of a node in pixels and zero if the element is not
|
|
* visible. The height is clamped to positive values.
|
|
* The browser switch is placed at this position as the _nodeHeight function is
|
|
* one of the most frequently called functions in the whole grid code and should
|
|
* stay quite fast.
|
|
*/
|
|
/*if ($j.browser.mozilla)
|
|
{
|
|
et2_dataview_container.prototype._nodeHeight = function(_node)
|
|
{
|
|
var height = 0;
|
|
// Firefox sometimes provides fractional pixel values - we are
|
|
// forced to use those - we can obtain the fractional pixel height
|
|
// by using the window.getComputedStyle function
|
|
var compStyle = getComputedStyle(_node, null);
|
|
if (compStyle)
|
|
{
|
|
var styleHeightStr = compStyle.getPropertyValue("height");
|
|
height = parseFloat(styleHeightStr.substr(0,
|
|
styleHeightStr.length - 2));
|
|
|
|
if (isNaN(height) || height < 1)
|
|
{
|
|
height = 0;
|
|
}
|
|
}
|
|
|
|
return height;
|
|
}
|
|
}
|
|
else
|
|
{*/
|
|
et2_dataview_container.prototype._nodeHeight = function(_node)
|
|
{
|
|
return _node.offsetHeight;
|
|
};
|
|
//}
|
|
|