蠻簡單的, 很容易理解.
(function($) {
$.fn.stupidtable = function(sortFns) {
return this.each(function() {
var $table = $(this);
sortFns = sortFns || {};
// Merge sort functions with some default sort functions.
sortFns = $.extend({}, $.fn.stupidtable.default_sort_fns, sortFns);
// ==================================================== //
// Begin execution! //
// ==================================================== //
// Do sorting when THs are clicked
$table.on("click.stupidtable", "thead th", function() {
var $this = $(this);
var th_index = 0;
var dir = $.fn.stupidtable.dir;
// Account for colspans
$this.parents("tr").find("th").slice(0, $this.index()).each(function() {
var cols = $(this).attr("colspan") || 1;
th_index += parseInt(cols,10);
});
// Determine (and/or reverse) sorting direction, default `asc`
var sort_dir = $this.data("sort-default") || dir.ASC;
if ($this.data("sort-dir"))
sort_dir = $this.data("sort-dir") === dir.ASC ? dir.DESC : dir.ASC;
// Choose appropriate sorting function.
var type = $this.data("sort") || null;
// Prevent sorting if no type defined
if (type === null) {
return;
}
// Trigger `beforetablesort` event that calling scripts can hook into;
// pass parameters for sorted column index and sorting direction
$table.trigger("beforetablesort", {column: th_index, direction: sort_dir});
// More reliable method of forcing a redraw
$table.css("display");
// Run sorting asynchronously on a timout to force browser redraw after
// `beforetablesort` callback. Also avoids locking up the browser too much.
setTimeout(function() {
// Gather the elements for this column
var column = [];
var sortMethod = sortFns[type];
var trs = $table.children("tbody").children("tr");
// Extract the data for the column that needs to be sorted and pair it up
// with the TR itself into a tuple
trs.each(function(index,tr) {
var $e = $(tr).children().eq(th_index);
var sort_val = $e.data("sort-value");
var order_by = typeof(sort_val) !== "undefined" ? sort_val : $e.text();
column.push([order_by, tr]);
});
// Sort by the data-order-by value
column.sort(function(a, b) { return sortMethod(a[0], b[0]); });
if (sort_dir != dir.ASC)
column.reverse();
// Replace the content of tbody with the sorted rows. Strangely (and
// conveniently!) enough, .append accomplishes this for us.
trs = $.map(column, function(kv) { return kv[1]; });
$table.children("tbody").append(trs);
// Reset siblings
$table.find("th").data("sort-dir", null).removeClass("sorting-desc sorting-asc");
$this.data("sort-dir", sort_dir).addClass("sorting-"+sort_dir);
// Trigger `aftertablesort` event. Similar to `beforetablesort`
$table.trigger("aftertablesort", {column: th_index, direction: sort_dir});
// More reliable method of forcing a redraw
$table.css("display");
}, 10);
});
});
};
// Enum containing sorting directions
$.fn.stupidtable.dir = {ASC: "asc", DESC: "desc"};
$.fn.stupidtable.default_sort_fns = {
"int": function(a, b) {
return parseInt(a, 10) - parseInt(b, 10);
},
"float": function(a, b) {
return parseFloat(a) - parseFloat(b);
},
"string": function(a, b) {
return a.localeCompare(b);
},
"string-ins": function(a, b) {
a = a.toLocaleLowerCase();
b = b.toLocaleLowerCase();
return a.localeCompare(b);
}
};
})(jQuery);
