453 lines
13 KiB
JavaScript
453 lines
13 KiB
JavaScript
/**
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* 需要 ExcelJS 套件
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* 提供一些 function，可以把呼叫 ExcelJS 的方法，把 html 的 table 轉成 excel
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*/
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// let namespace = window.exhelper;
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(function (ns) {
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'use strict';
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// create a self-reference
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var _self = ns;
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/**
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* 以 0 為起始的行、列座標
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* @param {Number} col 行座標
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* @param {Number} row 列座標
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*/
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_self.CellCoordinate = function (col, row) {
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this.col = col || 0;
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this.row = row || 0;
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}
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/**
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* 每格的資料
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* @param {String} addr 位址 (A1, A2...)
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* @param {Any} val 值
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* @param {Object} style 格式
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* @param {Number} type 型別 (預設 3 string)
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*/
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_self.CellData = function(addr, val, style, type){
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this.address = addr || "";
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this.value = val || "";
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this.style = style || {};
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this.type = type || 3;
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}
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/**
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* 合併欄位的資料
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* @param {Number} top
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* @param {Number} left
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* @param {Number} bottom
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* @param {Number} right
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*/
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_self.MergedRange = function(top, left, bottom, right){
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this.top = top || 0;
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this.left = left || 0;
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this.bottom = bottom || 0;
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this.right = right || 0;
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}
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/**
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* 傳入 CellCoordinate { col: 0, row: 0 } 回傳 A1
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* @param {CellCoordinate} coordinate
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* @return {String} 格位標記
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*/
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_self.parseCelltoTag = function (coordinate) {
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if (parseInt(coordinate.col) < 0) {
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console.log("傳入參數有誤，Coordinate 的 col 要大於 0");
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return;
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}
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return _self.getAlphabetByInt(parseInt(coordinate.col)) + (parseInt(coordinate.row) + 1);
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}
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/**
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* 傳入數字，回傳對應的字母 ( 0=>A, 1=>B...)
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* @param {Number} idx 要對應的數字
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* @param {Number} alphabetBase 要用幾個字母去對應，預設 26，最大 26
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*/
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_self.getAlphabetByInt = function (idx, alphabetBase) {
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if (!alphabetBase)
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alphabetBase = 26;
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let alphabets = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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// 在 base 內，一個字母就可以處理
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if (idx < alphabetBase) {
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return alphabets.charAt(idx);
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}
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let result = "";
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let quotient = idx;
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while (quotient >= alphabetBase) {
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let mod = quotient % alphabetBase;
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quotient = Math.floor(idx / alphabetBase);
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result = alphabets.charAt(mod) + result;
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}
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// 最後一碼
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result = alphabets.charAt(quotient - 1) + result;
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return result;
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}
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/**
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* 傳入字母，回傳對應的數值 ( A=>0, B=>2...)
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* @param {String} a 要對應的字串
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* @param {Number} alphabetBase 要用幾個字母去對應，預設 26，最大 26
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*/
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_self.getIdxByAlphbet = function (a, alphabetBase) {
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if (!alphabetBase)
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alphabetBase = 26;
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let alphabets = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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// 全部轉大寫
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a = a.toUpperCase();
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let result = 0;
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for (let i = 0; i < a.length; i++) {
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// 如果是第二碼以上，就要加 1 再去乘
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let modifier = (i == 0) ? 0 : 1;
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result += (alphabets.indexOf(a.charAt(a.length - (i + 1))) + modifier) * Math.pow(alphabetBase, i);
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}
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return result;
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}
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/**
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* 傳入格位代碼，回傳以 0 起始的座標物件
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* @param {String} tag 格位代碼 (A1, A2...)
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* @return {CellCoordinate} { col: 0, row: 0}
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*/
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_self.parseCelltoCoordinate = function (tag) {
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let re = /([A-Za-z])(\d+)/;
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let match = tag.match(re);
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return new _self.CellCoordinate(_self.getIdxByAlphbet(match[1]), parseInt(match[2]) - 1);
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}
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/**
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* 儲存 Blob 資料至下載檔案
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* @param {String} fileName 檔案名稱(含副檔名)
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* @param {object} byte 檔案內容 byte 陣列
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*/
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_self.saveBlob = function (fileName, byte) {
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var blob = new Blob([byte], {
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type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
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});
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if (window.navigator && window.navigator.msSaveOrOpenBlob) {
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// for IE
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window.navigator.msSaveOrOpenBlob(blob, fileName);
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} else {
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// for other browsers
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var url = window.URL.createObjectURL(blob, {
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type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
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});
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/*
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var a = $("<a style='display: none;'/>");
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a.attr("href", url);
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a.attr("download", fileName);
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$("body").append(a);
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a[0].click();
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window.URL.revokeObjectURL(url);
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a.remove();
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*/
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var a = document.createElement("a");
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a.style.display = "none";
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a.setAttribute("href", url);
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a.setAttribute("download", fileName);
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document.body.appendChild(a);
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a.click();
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window.URL.revokeObjectURL(url);
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a.remove();
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}
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}
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/**
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* 將 ExcelJS.Workbook 物件存成 excel 檔案，並開始下載
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* @param {String} filename 檔案名稱含副檔名
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* @param {object} Workbook 物件
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*/
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_self.saveXlsx = function (filename, wb) {
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wb.xlsx.writeBuffer().then(
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function (result) {
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_self.saveBlob(filename, result);
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},
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function (err) {
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console.log("error: ", err);
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}
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);
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}
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/**
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* 傳入 table 物件，回傳 ExcelJS.Workbook 物件
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* @param {object} elt table 物件
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* @param {object} opt 屬性設定 => { sheet: "sheet 名稱 預設 Sheet1" }
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* @return {object} ExcelJS.Workbook 物件
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*/
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_self.tableToBook = function (elt, opt) {
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if (!opt)
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opt = {};
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// 沒有這個方法 => 可能是 jquery 物件，要轉成原始的 html 物件
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if (!elt.getElementsByTagName)
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elt = elt.get(0);
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var wb = new ExcelJS.Workbook();
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wb.creator = "gamapay";
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wb.lastModifiedBy = "gamapay";
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wb.created = new Date();
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wb.modified = new Date();
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let sheetName = opt.sheet || "Sheet1";
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// Set workbook dates to 1904 date system
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wb.properties.date1904 = true;
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var ws = wb.addWorksheet(sheetName);
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var rows = elt.getElementsByTagName("tr");
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var mergedCells = new Array(rows.length);
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for (let i = 0; i < rows.length; i++) {
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// 取得格位資料
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var cols = rows[i].querySelectorAll("th,td");
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// 計算要右移幾格 (因為合併)
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let shiftCell = 0;
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for (let j = 0; j < cols.length; j++) {
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let colElem = cols[j];
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let colspan = colElem.getAttribute("colspan");
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let rowspan = colElem.getAttribute("rowspan");
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let colValue = colElem.innerHTML;
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// 如果有值，就進行移除所有的 html tag 運算
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if (colValue) {
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colValue = colValue.replace(/<\/?[^>]+(>|$)/g, "");
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}
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// 初始化本列的合併格位陣列 (如果是合併列的話，可能已經有初始化了)
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if (!mergedCells[i])
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mergedCells[i] = [];
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// 檢查目前的格位有沒有在合併欄位中，有的話就右移一格
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while (mergedCells[i].indexOf(j + shiftCell) >= 0) {
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shiftCell++;
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}
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// 目前的格位 (位移後)
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let currCell = new _self.CellCoordinate(j + shiftCell, i);
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// 轉成 tag
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let currTag = _self.parseCelltoTag(currCell);
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// 設定本格的值
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ws.getCell(currTag).value = colValue;
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// 是否有合併欄位
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let hasMerge = false;
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// 要合併欄位
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let toCell = new _self.CellCoordinate(j + shiftCell, i);
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if (colspan && colspan != 1) {
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hasMerge = true;
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toCell.col += parseInt(colspan) - 1;
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}
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if (rowspan && rowspan != 1) {
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hasMerge = true;
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toCell.row += parseInt(rowspan) - 1;
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}
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if (hasMerge) {
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// 把合併的欄位加到陣列中
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for (let idr = currCell.row; idr <= toCell.row; idr++) {
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// 如果是列之間的合併格位，會遇到還沒有初始化，所以在這要初始化
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if (!mergedCells[idr])
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mergedCells[idr] = [];
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for (let idx = currCell.col; idx <= toCell.col; idx++) {
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// 將合併的欄位加到陣列中
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mergedCells[idr].push(idx);
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}
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}
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// 將要合併的欄位轉成 tag
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let toTag = _self.parseCelltoTag(toCell);
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// 進行合併
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ws.mergeCells(currTag + ":" + toTag);
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}
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}
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}
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return wb;
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}
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/**
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* 在指定位置插入指定行數的空行
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* @param {Object} sheet Worksheet object
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* @param {Number} pos 要插入的位置
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* @param {Number} cnt 要插入幾行
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*/
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_self.insertRows = function (sheet, pos, cnt){
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// 建立要合併的欄位
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var merged = [];
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for(let cell in sheet._merges){
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let model = sheet._merges[cell].model;
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let range = new _self.MergedRange(model.top, model.left, model.bottom, model.right);
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merged.push(range);
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// 清除 merge 資訊
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sheet.unMergeCells(cell);
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}
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// 紀錄所有格位資料
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let cells = [];
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sheet.eachRow(function(row, rowNumber) {
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row.eachCell(function(cell, colNumber){
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let model = cell._value.model;
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let cellData = new _self.CellData(model.address, model.value, model. style, model.type);
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cells.push(cellData);
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});
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});
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// 清空所有資料
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sheet._rows = [];
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sheet._columns = [];
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for(let i = 0; i < cells.length; i++){
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let cell = cells[i];
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let cellCoordinate = _self.parseCelltoCoordinate(cell.address);
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// col 原則上不會變
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let newCol = cellCoordinate.col + 1;
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let newRow = cellCoordinate.row + 1;
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// row 依插入幾行而變
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if(newRow >= pos){
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newRow = newRow + cnt;
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}
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// 將原本的值寫入
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sheet.getRow(newRow).getCell(newCol).value = cell.value;
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}
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// 重新 merge
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for(let i = 0; i < merged.length; i++){
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let range = merged[i];
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// 如果插入的行在merge行的中間，那就不進行merge
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if(range.top > pos && range.bottom <= pos)
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continue;
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// 原本合併的行在插入行之下，下移指定行數
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// ，在插入行之上，維持不變
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if(range.top >= pos){
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range.top += cnt;
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range.bottom += cnt;
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}
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// 進行合併
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sheet.mergeCells(range.top, range.left, range.bottom, range.right);
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}
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}
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/**
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* 為 worksheet 物件增加表頭
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* @param {object} sheet ExcelJS.Worksheet 物件
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* @param {String} title 表頭
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*/
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_self.addTitle = function (sheet, title) {
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_self.insertRows(sheet, 1, 1);
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// 插入表頭
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sheet.mergeCells(1, 1, 1, sheet.columnCount);
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let titleCell = sheet.getRow(1).getCell(1);
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titleCell.value = title;
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titleCell.alignment = { vertical: 'middle', horizontal: 'center' };
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titleCell.font = { bold: true };
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}
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/**
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* 合併兩個 sheet
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* @param {object} fromSheet
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* @param {object} toSheet
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* @param {Number} rowSeperate
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*/
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_self.mergeSheets = function(fromSheet, toSheet, rowSeperate){
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// 兩個 table 之間的空行數
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let seperate = rowSeperate + 1;
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// fromSheet 新的開始行
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let startRow = toSheet.rowCount + 1 + rowSeperate;
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for (let r = 1; r <= fromSheet.rowCount; r++) {
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for (let c = 1; c <= fromSheet.columnCount; c++) {
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let newRow = r + startRow;
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toSheet.getRow(newRow).getCell(c).value = fromSheet.getRow(r).getCell(c).value;
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}
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}
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// 建立要合併的欄位
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var merged = [];
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for (let cell in fromSheet._merges) {
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let model = fromSheet._merges[cell].model;
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let range = new _self.MergedRange(model.top, model.left, model.bottom, model.right);
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merged.push(range);
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}
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for (let i = 0; i < merged.length; i++) {
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let range = merged[i];
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toSheet.mergeCells(range.top + startRow, range.left, range.bottom + startRow, range.right);
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}
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}
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// reasign everything just incase
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_self = ns;
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})(window.exhelper = window.exhelper || {});
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