-
Notifications
You must be signed in to change notification settings - Fork 0
/
tablesort.js
281 lines (234 loc) · 7.6 KB
/
tablesort.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
(function () {
function Tablesort(el, options) {
if (!(this instanceof Tablesort)) return new Tablesort(el, options);
if (!el || el.tagName !== "TABLE") {
throw new Error("Element must be a table");
}
this.init(el, options || {});
}
var sortOptions = [];
var createEvent = function (name) {
var evt;
if (!window.CustomEvent || typeof window.CustomEvent !== "function") {
evt = document.createEvent("CustomEvent");
evt.initCustomEvent(name, false, false, undefined);
} else {
evt = new CustomEvent(name);
}
return evt;
};
var getInnerText = function (el, options) {
return (
el.getAttribute(options.sortAttribute || "data-sort") ||
el.textContent ||
el.innerText ||
""
);
};
// Default sort method if no better sort method is found
var caseInsensitiveSort = function (a, b) {
a = a.trim().toLowerCase();
b = b.trim().toLowerCase();
if (a === b) return 0;
if (a < b) return 1;
return -1;
};
var getCellByKey = function (cells, key) {
return [].slice.call(cells).find(function (cell) {
return cell.getAttribute("data-sort-column-key") === key;
});
};
// Stable sort function
// If two elements are equal under the original sort function,
// then there relative order is reversed
var stabilize = function (sort, antiStabilize) {
return function (a, b) {
var unstableResult = sort(a.td, b.td);
if (unstableResult === 0) {
if (antiStabilize) return b.index - a.index;
return a.index - b.index;
}
return unstableResult;
};
};
Tablesort.extend = function (name, pattern, sort) {
if (typeof pattern !== "function" || typeof sort !== "function") {
throw new Error("Pattern and sort must be a function");
}
sortOptions.push({
name: name,
pattern: pattern,
sort: sort,
});
};
Tablesort.prototype = {
init: function (el, options) {
var that = this,
firstRow,
defaultSort,
i,
cell;
that.table = el;
that.thead = false;
that.options = options;
if (el.rows && el.rows.length > 0) {
if (el.tHead && el.tHead.rows.length > 0) {
for (i = 0; i < el.tHead.rows.length; i++) {
if (el.tHead.rows[i].getAttribute("data-sort-method") === "thead") {
firstRow = el.tHead.rows[i];
break;
}
}
if (!firstRow) {
firstRow = el.tHead.rows[el.tHead.rows.length - 1];
}
that.thead = true;
} else {
firstRow = el.rows[0];
}
}
if (!firstRow) return;
var onClick = function () {
if (that.current && that.current !== this) {
that.current.removeAttribute("aria-sort");
}
that.current = this;
that.sortTable(this);
};
// Assume first row is the header and attach a click handler to each.
for (i = 0; i < firstRow.cells.length; i++) {
cell = firstRow.cells[i];
cell.setAttribute("role", "columnheader");
if (cell.getAttribute("data-sort-method") !== "none") {
cell.tabindex = 0;
cell.addEventListener("click", onClick, false);
if (cell.getAttribute("data-sort-default") !== null) {
defaultSort = cell;
}
}
}
if (defaultSort) {
that.current = defaultSort;
that.sortTable(defaultSort);
}
},
sortTable: function (header, update) {
var that = this,
columnKey = header.getAttribute("data-sort-column-key"),
column = header.cellIndex,
sortFunction = caseInsensitiveSort,
item = "",
items = [],
i = that.thead ? 0 : 1,
sortMethod = header.getAttribute("data-sort-method"),
sortOrder = header.getAttribute("aria-sort");
that.table.dispatchEvent(createEvent("beforeSort"));
// If updating an existing sort, direction should remain unchanged.
if (!update) {
if (sortOrder === "ascending") {
sortOrder = "descending";
} else if (sortOrder === "descending") {
sortOrder = "ascending";
} else {
sortOrder = that.options.descending ? "descending" : "ascending";
}
header.setAttribute("aria-sort", sortOrder);
}
if (that.table.rows.length < 2) return;
// If we force a sort method, it is not necessary to check rows
if (!sortMethod) {
var cell;
while (items.length < 3 && i < that.table.tBodies[0].rows.length) {
if (columnKey) {
cell = getCellByKey(that.table.tBodies[0].rows[i].cells, columnKey);
} else {
cell = that.table.tBodies[0].rows[i].cells[column];
}
// Treat missing cells as empty cells
item = cell ? getInnerText(cell, that.options) : "";
item = item.trim();
if (item.length > 0) {
items.push(item);
}
i++;
}
if (!items) return;
}
for (i = 0; i < sortOptions.length; i++) {
item = sortOptions[i];
if (sortMethod) {
if (item.name === sortMethod) {
sortFunction = item.sort;
break;
}
} else if (items.every(item.pattern)) {
sortFunction = item.sort;
break;
}
}
that.col = column;
for (i = 0; i < that.table.tBodies.length; i++) {
var newRows = [],
noSorts = {},
j,
totalRows = 0,
noSortsSoFar = 0;
if (that.table.tBodies[i].rows.length < 2) continue;
for (j = 0; j < that.table.tBodies[i].rows.length; j++) {
var cell;
item = that.table.tBodies[i].rows[j];
if (item.getAttribute("data-sort-method") === "none") {
// keep no-sorts in separate list to be able to insert
// them back at their original position later
noSorts[totalRows] = item;
} else {
if (columnKey) {
cell = getCellByKey(item.cells, columnKey);
} else {
cell = item.cells[that.col];
}
// Save the index for stable sorting
newRows.push({
tr: item,
td: cell ? getInnerText(cell, that.options) : "",
index: totalRows,
});
}
totalRows++;
}
// Before we append should we reverse the new array or not?
// If we reverse, the sort needs to be `anti-stable` so that
// the double negatives cancel out
if (sortOrder === "descending") {
newRows.sort(stabilize(sortFunction, true));
} else {
newRows.sort(stabilize(sortFunction, false));
newRows.reverse();
}
// append rows that already exist rather than creating new ones
for (j = 0; j < totalRows; j++) {
if (noSorts[j]) {
// We have a no-sort row for this position, insert it here.
item = noSorts[j];
noSortsSoFar++;
} else {
item = newRows[j - noSortsSoFar].tr;
}
// appendChild(x) moves x if already present somewhere else in the DOM
that.table.tBodies[i].appendChild(item);
}
}
that.table.dispatchEvent(createEvent("afterSort"));
},
refresh: function () {
if (this.current !== undefined) {
this.sortTable(this.current, true);
}
},
};
if (typeof module !== "undefined" && module.exports) {
module.exports = Tablesort;
} else {
window.Tablesort = Tablesort;
}
})();