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egroupware_official/api/js/etemplate/et2_widget_dynheight.ts

200 lines
5.1 KiB
TypeScript

/**
* EGroupware eTemplate2 - JS Dynheight object
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @subpackage api
* @link https://www.egroupware.org
* @author Andreas Stöckel
* @copyright EGroupware GmbH 2011-2021
*/
/*egw:use
/vendor/bower-asset/jquery/dist/jquery.js;
et2_core_inheritance;
*/
import {egw} from "../jsapi/egw_global";
/**
* Object which resizes an inner node to the maximum extend of an outer node
* (without creating a scrollbar) - it achieves that by performing some very
* nasty and time consuming calculations.
*/
export class et2_dynheight
{
private initialized: boolean = false;
private outerNode: JQuery;
private innerNode: JQuery;
private minHeight: number = 0;
private bottomNodes: any[] = [];
private innerMargin: number = 0;
private outerMargin: number = 0;
constructor(_outerNode, _innerNode, _minHeight)
{
this.outerNode = jQuery(_outerNode);
this.innerNode = jQuery(_innerNode);
this.minHeight = _minHeight;
}
destroy()
{
this.outerNode = null;
this.innerNode = null;
this.bottomNodes = [];
}
/**
* Resizes the inner node. When this is done, the callback function is
* called.
*
* @param {function} _callback
* @param {object} _context
*/
update( _callback, _context)
{
// Check whether the inner node is actually visible - if not, don't
// trigger the callback function
if (this.innerNode.is(":visible"))
{
// Initialize the height calculation
this._initialize();
// Get the outer container height and offset, if available
const oh = this.outerNode.height();
const ot = this.outerNode.offset() ? this.outerNode.offset().top : 0;
// Get top and height of the inner node
const it = this.innerNode.offset().top;
// Calculate the height of the "bottomNodes"
let bminTop = this.bottomNodes.length ? Infinity : 0;
let bmaxBot = 0;
for (let i = 0; i < this.bottomNodes.length; i++)
{
// Ignore hidden popups
if(this.bottomNodes[i].find('.action_popup').length)
{
egw.debug('warn', "Had to skip a hidden popup - it should be removed",
this.bottomNodes[i].find('.action_popup')
);
continue;
}
// Ignore other hidden nodes
if(!this.bottomNodes[i].is(':visible')) continue;
// Get height, top and bottom and calculate the maximum/minimum
let bh = this.bottomNodes[i].outerHeight(true);
let bt = this.bottomNodes[i].offset().top;
const bb = bh + bt;
if (i == 0 || bminTop > bt)
{
bminTop = bt;
}
if (i == 0 || bmaxBot < bb)
{
bmaxBot = bb;
}
}
// Get the height of the bottom container
const bh = Math.max(0, bmaxBot - bminTop);
// Calculate the new height of the inner container
const h = Math.max(this.minHeight, oh + ot - it - bh -
this.innerMargin - this.outerMargin);
this.innerNode.height(h);
// Update the width
// Some checking to make sure it doesn't overflow the width when user
// resizes the window
let w = this.outerNode.width();
if (w > jQuery(window).width())
{
// 50px border, totally arbitrary, but we just need to make sure it's inside
w = jQuery(window).width()-50;
}
if(w != this.innerNode.outerWidth())
{
this.innerNode.width(w);
}
// Call the callback function
if (typeof _callback != "undefined")
{
_callback.call(_context, w, h);
}
}
}
/**
* Function used internally which collects all DOM-Nodes which are located
* below this element.
*
* @param {HTMLElement} _node
* @param {number} _bottom
*/
_collectBottomNodes( _node : any, _bottom? : number)
{
// Calculate the bottom position of the inner node
if (typeof _bottom == "undefined")
{
_bottom = this.innerNode.offset().top + this.innerNode.height();
}
if (_node)
{
// Accumulate the outer margin of the parent elements
const node = jQuery(_node);
const ooh = node.outerHeight(true);
const oh = node.height();
this.outerMargin += (ooh - oh) / 2; // Divide by 2 as the value contains margin-top and -bottom
// Iterate over the children of the given node and do the same
// recursively to the parent nodes until the _outerNode or body is
// reached.
const self = this;
jQuery(_node).children().each(function() {
const $this = jQuery(this);
const top = $this.offset().top;
if(this != self.innerNode[0] && top >= _bottom && ["fixed", "absolute"].indexOf(getComputedStyle(this).position) == -1)
{
self.bottomNodes.push($this);
}
});
if (_node != this.outerNode[0] && _node != jQuery("body")[0])
{
this._collectBottomNodes(_node.parentNode, _bottom);
}
}
}
/**
* Used internally to calculate some information which will not change over
* the time.
*/
_initialize( )
{
if (!this.initialized)
{
// Collect all bottomNodes and calculates the outer margin
this.bottomNodes = [];
this.outerMargin = 0;
this._collectBottomNodes(this.innerNode[0].parentNode);
// Calculate the inner margin
const ioh = this.innerNode.outerHeight(true);
const ih = this.innerNode.height();
this.innerMargin = ioh - ih;
this.initialized = true;
}
}
}