User:Ras52/mountainlist.js

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function mountainlist_init() {
	var idnum = 0;
	// Find all tables with class sortable and make them sortable
	var tables = getElementsByClassName(document, "table", "mountainlist");
	for (var ti = 0; ti < tables.length ; ti++) {
		if (!tables[ti].id) {
			tables[ti].setAttribute('id','mountainlist_table_id_'+idnum);
			++idnum;
		}
		mountainlist_initTable(tables[ti]);
	}
}
 
function mountainlist_initTable(table) {
	var firstRow;
	if (table.rows && table.rows.length > 0) {
		if (table.tHead && table.tHead.rows.length > 0) {
			firstRow = table.tHead.rows[table.tHead.rows.length-1];
		} else {
			firstRow = table.rows[0];
		}
	}
	if (!firstRow) return;
	// We have a first row: assume it's the header
 
        var prom, height;
	for (var i = 0; i < firstRow.cells.length; i++) {
		var cell = firstRow.cells[i];
		if ((" "+cell.className+" ").indexOf(" prominence ") != -1) prom = cell;
		if ((" "+cell.className+" ").indexOf(" height ") != -1) height = cell;
	}
 
	if (prom && height && mountainlist_display_eminence) {
		mountainlist_addEminence(table, firstRow, prom.cellIndex, height.cellIndex);
	}
 
	for (var i = 0; i < firstRow.cells.length; i++) { 
		var cell = firstRow.cells[i];
		if ((" "+cell.className+" ").indexOf(" metres ") != -1 && mountainlist_convert_metres_to_feet) {
			mountainlist_doConv(table, cell.cellIndex, 3.28084);
			cell.className.replace( /\bmetres\b/, "feet" );
			// Heuristics to edit the title
			mountainlist_editCellTitle( cell, ["metres", "feet", "metre", "foot", "meters", "feet", "meter", "foot", "m", "ft"] );
		}
		else if ((" "+cell.className+" ").indexOf(" feet ") != -1 && mountainlist_convert_feet_to_metres) {
			mountainlist_doConv(table, cell.cellIndex, 1/3.28084);
			cell.className = cell.className.replace( /\bmetres\b/, "feet" );
			// Heuristics to edit the title
			mountainlist_editCellTitle( cell, ["feet", "metres", "foot", "metre", "feet", "meters", "foot", "meter", "ft", "m"] );
		}
		if ((" "+cell.className+" ").indexOf(" prominence ") != -1) prom = cell;
		if ((" "+cell.className+" ").indexOf(" height ") != -1) height = cell;
	}
}
 
function mountainlist_addEminence(table, firstRow, prom, height) {
	while (table && !(table.tagName && table.tagName.toLowerCase() == 'table'))
		table = table.parentNode;
	if (!table) return;
 
	// Work out a type for the column
	if (table.rows.length <= 1) return;
 
	// Skip the first row if that's where the headings are
	var rowStart = (table.tHead && table.tHead.rows.length > 0 ? 0 : 1);
 
	for (var i = rowStart; i < table.rows.length; i++) {
		if (table.rows[i].cells.length > prom && table.rows[i].cells.length > height) {
			var h = mountainlist_parseCellAsInt(table.rows[i].cells[height]);
			var p = mountainlist_parseCellAsInt(table.rows[i].cells[prom]);
			var val = mountainlist_addCommas( Math.round( Math.sqrt(h*p) ) );
			table.rows[i].innerHTML += '<td align="right">'+val+'</td>';
		}
	}
 
	var classname = '', unit = '';
	if ((" "+firstRow.cells[prom].className+" ").indexOf(" metres ") != -1 && (" "+firstRow.cells[prom].className+" ").indexOf(" metres ") != -1) {
		classname = 'metres'; unit = ' (m)';
	}
	else if ((" "+firstRow.cells[prom].className+" ").indexOf(" metres ") != -1 && (" "+firstRow.cells[prom].className+" ").indexOf(" feet ") != -1) {
		classname = 'feet'; unit = ' (ft)';
	}

	// Code copied from sortable table code.
	// NOTE: This isn't a robust implementation strategy: what if the internal workings of that code change?
	// We shouldn't be relying on its internals, but equally we can't just use the public interface.
        var sortbutton = '';
	if ((" "+table.className+" ").indexOf(" sortable ") != -1) {
		sortbutton = '&nbsp;&nbsp;<a href="#" class="sortheader" onclick="ts_resortTable(this);return false;"><span class="sortarrow"><img src="'+ ts_image_path + ts_image_none + '" alt="&darr;"/></span></a>';
	}

	firstRow.innerHTML += '<th class=' + classname + '>Eminence' + unit + sortbutton + '</th>';
}
 
function mountainlist_doConv(table, column, factor) {
	while (table && !(table.tagName && table.tagName.toLowerCase() == 'table'))
		table = table.parentNode;
	if (!table) return;
 
	// Work out a type for the column
	if (table.rows.length <= 1) return;
 
	// Skip the first row if that's where the headings are
	var rowStart = (table.tHead && table.tHead.rows.length > 0 ? 0 : 1);
 
	for (var i = rowStart; i < table.rows.length; i++) {
		if (table.rows[i].cells.length > column) {
			var val = Math.round(mountainlist_parseCellAsInt(table.rows[i].cells[column]) * factor);
                        table.rows[i].cells[column].innerHTML = mountainlist_addCommas(val);
		}
	}
}
 
function mountainlist_addCommas(str) {
	str += '';
	x = str.split('.');
	x1 = x[0];
	x2 = x.length > 1 ? '.' + x[1] : '';
	var rgx = /(\d+)(\d{3})/;
	while (rgx.test(x1)) {
		x1 = x1.replace(rgx, '$1' + ',' + '$2');
	}
	return x1 + x2;
}

function mountainlist_parseCellAsInt(cell) {
	return parseInt( cell.innerHTML.replace( /^\s+([0-9,.]+).*$/, '$1' ).replace( /,/g, '' ) );
}
 
function mountainlist_editCellTitle(cell, vals) {
	if (vals.length % 2) return;
	for (var i = 0; i < vals.length; i+=2) 
		cell.innerHTML = cell.innerHTML.replace(new RegExp("\\b" + vals[i] + "\\b"), vals[i+1]);
}
 
addOnloadHook(mountainlist_init);