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// license:BSD-3-Clause
// copyright-holders:Vas Crabb

function sort_table(tbl, col, dir, numeric)
{
	var tbody = tbl.tBodies[0];
	var trows = Array.prototype.slice.call(tbody.rows, 0).sort(
			function (x, y)
			{
				if (numeric)
					return dir * (parseInt(x.cells[col].textContent) - parseInt(y.cells[col].textContent));
				else
					return dir * x.cells[col].textContent.localeCompare(y.cells[col].textContent);
			})
	trows.forEach(function (row) { tbody.appendChild(row); });
}


function make_table_sortable(tbl)
{
	var headers = tbl.tHead.rows[0].cells;
	var i;
	for (i = 0; i < headers.length; i++)
	{
		(function (col)
		{
			var dir = 1;
			var sorticon = document.createElement("img");
			sorticon.setAttribute("src", assetsurl + "/sortind.png");
			sorticon.style.cssFloat = "right";
			sorticon.style.marginLeft = "0.5em";
			headers[col].appendChild(sorticon);
			headers[col].addEventListener(
					'click',
					function ()
					{
						imgsrc = sorticon.getAttribute("src");
						imgsrc = imgsrc.substr(imgsrc.lastIndexOf('/') + 1);
						if (imgsrc != 'sortind.png')
							dir = -dir;
						if (dir < 0)
							sorticon.setAttribute("src", assetsurl + "/sortdesc.png");
						else
							sorticon.setAttribute("src", assetsurl + "/sortasc.png");
						var i;
						for (i = 0; i < headers.length; i++)
						{
							if (i != col)
								headers[i].lastChild.setAttribute("src", assetsurl + "/sortind.png");
						}
						sort_table(tbl, col, dir, headers[col].getAttribute("class") == "numeric");
					});
		}(i));
	}
}