frame/excel/Export2Excel.js

/* eslint-disable */

require('script-loader!file-saver');

require('./Blob');

require('script-loader!xlsx/dist/xlsx.core.min');

function generateArray(table) {

  var out = [];

  var rows = table.querySelectorAll('tr');

  var ranges = [];

  for (var R = 0; R < rows.length; ++R) {

    var outRow = [];

    var row = rows[R];

    var columns = row.querySelectorAll('td');

    for (var C = 0; C < columns.length; ++C) {

      var cell = columns[C];

      var colspan = cell.getAttribute('colspan');

      var rowspan = cell.getAttribute('rowspan');

      var cellValue = cell.innerText;

      if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;

      //Skip ranges

      ranges.forEach(function (range) {

        if (R >= range.s.r && R <= range.e.r && outRow.length >= range.s.c && outRow.length <= range.e.c) {

          for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);

        }

      });

      //Handle Row Span

      if (rowspan || colspan) {

        rowspan = rowspan || 1;

        colspan = colspan || 1;

        ranges.push({ s: { r: R, c: outRow.length }, e: { r: R + rowspan - 1, c: outRow.length + colspan - 1 } });

      }

      ;

      //Handle Value

      outRow.push(cellValue !== "" ? cellValue : null);

      //Handle Colspan

      if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null);

    }

    out.push(outRow);

  }

  return [out, ranges];

};

function datenum(v, date1904) {

  if (date1904) v += 1462;

  var epoch = Date.parse(v);

  return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);

}

function sheet_from_array_of_arrays(data, opts) {

  var ws = {};

  var range = { s: { c: 10000000, r: 10000000 }, e: { c: 0, r: 0 } };

  for (var R = 0; R != data.length; ++R) {

    for (var C = 0; C != data[R].length; ++C) {

      if (range.s.r > R) range.s.r = R;

      if (range.s.c > C) range.s.c = C;

      if (range.e.r < R) range.e.r = R;

      if (range.e.c < C) range.e.c = C;

      var cell = { v: data[R][C] };

      if (cell.v == null) continue;

      var cell_ref = XLSX.utils.encode_cell({ c: C, r: R });

      if (typeof cell.v === 'number') cell.t = 'n';

      else if (typeof cell.v === 'boolean') cell.t = 'b';

      else if (cell.v instanceof Date) {

        cell.t = 'n';

        cell.z = XLSX.SSF._table[14];

        cell.v = datenum(cell.v);

      }

      else cell.t = 's';

      ws[cell_ref] = cell;

    }

  }

  if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range);

  return ws;

}

function Workbook() {

  if (!(this instanceof Workbook)) return new Workbook();

  this.SheetNames = [];

  this.Sheets = {};

}

function s2ab(s) {

  var buf = new ArrayBuffer(s.length);

  var view = new Uint8Array(buf);

  for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;

  return buf;

}

export function export_table_to_excel(id) {

  var theTable = document.getElementById(id);

  console.log('a')

  var oo = generateArray(theTable);

  var ranges = oo[1];

  /* original data */

  var data = oo[0];

  var ws_name = "SheetJS";

  console.log(data);

  var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);

  /* add ranges to worksheet */

  // ws['!cols'] = ['apple', 'banan'];

  ws['!merges'] = ranges;

  /* add worksheet to workbook */

  wb.SheetNames.push(ws_name);

  wb.Sheets[ws_name] = ws;

  var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' });

  saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), "test.xlsx")

}

function formatJson(jsonData) {

  console.log(jsonData)

}

export function export_json_to_excel(th, jsonData, defaultTitle) {

  /* original data */

  var data = jsonData;

  data.unshift(th);

  var ws_name = "Sheet";

  var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);

  /*设置worksheet每列的最大宽度*/

  const colWidth = data.map(row => row.map(val => {

    /*先判断是否为null/undefined*/

    if (val == null) {

      return { 'wch': 10 };

    }

    /*再判断是否为中文*/

    else if (val.toString().charCodeAt(0) > 255) {

      return { 'wch': val.toString().length * 2 + 5 };

    } else {

      return { 'wch': val.toString().length + 5 };

    }

  }))

  /*以第一行为初始值*/

  let result = colWidth[0];

  for (let i = 1; i < colWidth.length; i++) {

    for (let j = 0; j < colWidth[i].length; j++) {

      if (result[j]['wch'] < colWidth[i][j]['wch']) {

        result[j]['wch'] = colWidth[i][j]['wch'];

      }

    }

  }

  ws['!cols'] = result;

  /* add worksheet to workbook */

  wb.SheetNames.push(ws_name);

  wb.Sheets[ws_name] = ws;

  var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' });

  var title = defaultTitle || '列表'

  saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), title + ".xlsx")

}