frappe/js/legacy/webpage/spinner.js

// Copyright (c) 2012 Web Notes Technologies Pvt Ltd (http://erpnext.com)
// 
// MIT License (MIT)
// 
// Permission is hereby granted, free of charge, to any person obtaining a 
// copy of this software and associated documentation files (the "Software"), 
// to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, 
// and/or sell copies of the Software, and to permit persons to whom the 
// Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in 
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
// OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// 

var pending_req = 0;
var fcount = 0;
var dialog_back;

function set_loading() {
	pending_req++;
	$('#spinner').css('visibility', 'visible');
	$('body').css('cursor', 'progress');
}

function hide_loading() {
	pending_req--;
	if(!pending_req){
		$('body').css('cursor', 'default');
		$('#spinner').css('visibility', 'hidden');
	}
}

function freeze() {
	// blur
	if(!dialog_back) {
		dialog_back = $a($i('body_div'), 'div', 'dialog_back');
		$(dialog_back).css('opacity', 0.6);
	}
	$ds(dialog_back);
	fcount++;
}
function unfreeze() {
	if(!fcount)return; // anything open?
	fcount--;
	if(!fcount) {
		$dh(dialog_back);
	}
}