var addSorting = (function () { "use strict"; var cols, currentSort = { index: 0, desc: false }; // returns the summary table element function getTable() { return document.querySelector('.coverage-summary table'); } // returns the thead element of the summary table function getTableHeader() { return getTable().querySelector('thead tr'); } // returns the tbody element of the summary table function getTableBody() { return getTable().querySelector('tbody'); } // returns the th element for nth column function getNthColumn(n) { return getTableHeader().querySelectorAll('th')[n]; } // loads all columns function loadColumns() { var colNodes = getTableHeader().querySelectorAll('th'), colNode, cols = [], col, i; for (i = 0; i < colNodes.length; i += 1) { colNode = colNodes[i]; col = { key: colNode.getAttribute('data-col'), sortable: !colNode.getAttribute('data-nosort'), type: colNode.getAttribute('data-type') || 'string' }; cols.push(col); if (col.sortable) { col.defaultDescSort = col.type === 'number'; colNode.innerHTML = colNode.innerHTML + ''; } } return cols; } // attaches a data attribute to every tr element with an object // of data values keyed by column name function loadRowData(tableRow) { var tableCols = tableRow.querySelectorAll('td'), colNode, col, data = {}, i, val; for (i = 0; i < tableCols.length; i += 1) { colNode = tableCols[i]; col = cols[i]; val = colNode.getAttribute('data-value'); if (col.type === 'number') { val = Number(val); } data[col.key] = val; } return data; } // loads all row data function loadData() { var rows = getTableBody().querySelectorAll('tr'), i; for (i = 0; i < rows.length; i += 1) { rows[i].data = loadRowData(rows[i]); } } // sorts the table using the data for the ith column function sortByIndex(index, desc) { var key = cols[index].key, sorter = function (a, b) { a = a.data[key]; b = b.data[key]; return a < b ? -1 : a > b ? 1 : 0; }, finalSorter = sorter, tableBody = document.querySelector('.coverage-summary tbody'), rowNodes = tableBody.querySelectorAll('tr'), rows = [], i; if (desc) { finalSorter = function (a, b) { return -1 * sorter(a, b); }; } for (i = 0; i < rowNodes.length; i += 1) { rows.push(rowNodes[i]); tableBody.removeChild(rowNodes[i]); } rows.sort(finalSorter); for (i = 0; i < rows.length; i += 1) { tableBody.appendChild(rows[i]); } } // removes sort indicators for current column being sorted function removeSortIndicators() { var col = getNthColumn(currentSort.index), cls = col.className; cls = cls.replace(/ sorted$/, '').replace(/ sorted-desc$/, ''); col.className = cls; } // adds sort indicators for current column being sorted function addSortIndicators() { getNthColumn(currentSort.index).className += currentSort.desc ? ' sorted-desc' : ' sorted'; } // adds event listeners for all sorter widgets function enableUI() { var i, el, ithSorter = function ithSorter(i) { var col = cols[i]; return function () { var desc = col.defaultDescSort; if (currentSort.index === i) { desc = !currentSort.desc; } sortByIndex(i, desc); removeSortIndicators(); currentSort.index = i; currentSort.desc = desc; addSortIndicators(); }; }; for (i =0 ; i < cols.length; i += 1) { if (cols[i].sortable) { el = getNthColumn(i).querySelector('.sorter'); if (el.addEventListener) { el.addEventListener('click', ithSorter(i)); } else { el.attachEvent('onclick', ithSorter(i)); } } } } // adds sorting functionality to the UI return function () { if (!getTable()) { return; } cols = loadColumns(); loadData(cols); addSortIndicators(); enableUI(); }; })(); window.addEventListener('load', addSorting);