js-xlsx和file-saver插件前端html的table导出数据到excel的表格增加表格标题行

Posted 2020-11-03 lilyshy

基于上一篇随笔后，新需求需要再导出的表格上面加一行标题行

 1 function parse_dom_table_addtitle(table, _opts, title) {
 2         var opts = _opts || {};
 3         var oss = opts.defaultCellStyle || {};  /*单元格样式  */
 4         if (DENSE != null) opts.dense = DENSE;
 5         var ws = opts.dense ? ([]) : ({});
 6         var rows = table.getElementsByTagName(‘tr‘);
 7         var sheetRows = Math.min(opts.sheetRows || 10000000, rows.length);
 8         var range = { s: { r: 0, c: 0 }, e: { r: sheetRows+1 , c: 0 } };
 9         var merges = [], midx = 0;
10         var R = 1, _C = 0, C = 0, RS = 0, CS = 0;
11         var _title = title || ""; 
12         var title_o = { t: ‘s‘, v: _title, s: oss };
13         ws[encode_cell({ c: 0, r: 0 })] = title_o;
14         var maxc = 0;
15         for (; R < sheetRows+1; ++R) {
16             var nR = R - 1
17             var row = rows[nR];
18             var elts = (row.children);
19             for (_C = C = 0; _C < elts.length; ++_C) {
20                 var elt = elts[_C], v = htmldecode(elts[_C].innerHTML);
21                 for (midx = 0; midx < merges.length; ++midx) {
22                     var m = merges[midx];
23                     if (m.s.c == C && m.s.r <= R && R <= m.e.r) {
24                         C = m.e.c + 1; midx = -1;
25                     }
26                 }
27                 /* TODO: figure out how to extract nonstandard mso- style */
28                 CS = +elt.getAttribute("colspan") || 1;
29                 if ((RS = +elt.getAttribute("rowspan")) > 0 || CS > 1)
30                     merges.push({ s: { r: R, c: C }, e: { r: R + (RS || 1) - 1, c: C + CS - 1 } });
31                 var o = { t: ‘s‘, v: v, s: oss };
32                 var _t = elt.getAttribute("t") || "";
33                 if (v != null) {
34                     if (v.length == 0) o.t = _t || ‘z‘;
35                     else if (opts.raw || v.trim().length == 0 || _t == "s") { }
36                     else if (v === ‘TRUE‘) o = { t: ‘b‘, v: true, s: oss };
37                     else if (v === ‘FALSE‘) o = { t: ‘b‘, v: false, s: oss };
38                     else if (!isNaN(fuzzynum(v))) o = { t: ‘n‘, v: fuzzynum(v), s: oss };
39                     else if (!isNaN(fuzzydate(v).getDate())) {
40                         o = ({ t: ‘d‘, v: parseDate(v), s: oss });
41                         if (!opts.cellDates) o = ({ t: ‘n‘, v: datenum(o.v), s: oss });
42                         o.z = opts.dateNF || SSF._table[14];
43                     }
44                 }
45                 if (opts.dense) { if (!ws[R]) ws[R] = []; ws[R][C] = o; }
46                 else ws[encode_cell({ c: C, r: R })] = o;
47                 /* 合并数据处理开始*/
48                 if (CS != 1) {
49                     for (var i = 1; i < CS; i++) {
50                         var newc = C + i
51                         if (RS != 1) {
52                             for (var m = 1; m < RS; m++) {
53                                 var newr = R + m;
54                                 ws[encode_cell({ c: newc, r: newr })] = o;
55                             }
56                         }
57                         else {
58                             ws[encode_cell({ c: newc, r: R })] = o;
59                         }
60                     }
61                 }
62                 else {
63                     if (RS != 1) {
64                         for (var m = 1; m < RS; m++) {
65                             var newr = R + m;
66                             ws[encode_cell({ c: C, r: newr })] = o;
67                         }
68                     }
69                 }
70                 /*合并数据处理结束*/
71                 if (range.e.c < C) range.e.c = C;
72                 C += CS;
73                 if (maxc < C)
74                 {
75                     maxc = C;
76                 }
77             }
78             if (R == sheetRows)
79             {
80                 merges.push({ s: { r: 0, c: 0 }, e: { r: 0, c: maxc-1 } });
81             }
82         }
83         ws[‘!merges‘] = merges;
84         ws[‘!ref‘] = encode_range(range);
85         if (sheetRows < rows.length) ws[‘!fullref‘] = encode_range((range.e.r = rows.length-1 , range));
86         return ws;
87     }