feat: support col width

support col width by specifing cols in a columns: {title:some-title, width: {wpx:num-of-pixes}} or {wch:num-of-chars}

Author: boazadato

dist/ExcelPlugin/utils/DataUtil.js

@@ -64,16 +64,26 @@ var excelSheetFromDataSet = function excelSheetFromDataSet(dataSet) {
 
         rowCount += ySteps;
 
+        var columnsWidth = [];
         if (columns.length >= 0) {
             columns.forEach(function (col, index) {
                 var cellRef = _xlsx2.default.utils.encode_cell({ c: xSteps + index, r: rowCount });
                 fixRange(range, 0, 0, rowCount, xSteps, ySteps);
-                getHeaderCell(col, cellRef, ws);
+                var colTitle = col;
+                if ((typeof col === 'undefined' ? 'undefined' : _typeof(col)) === 'object') {
+                    colTitle = col.title;
+                    columnsWidth.push(col.width || { wpx: 80 }); /* wch (chars), wpx (pixels) - e.g. [{wch:6},{wpx:50}] */
+                }
+                getHeaderCell(colTitle, cellRef, ws);
             });
 
             rowCount += 1;
         }
 
+        if (columnsWidth.length > 0) {
+            ws['!cols'] = columnsWidth;
+        }
+
         for (var R = 0; R != data.length; ++R, rowCount++) {
             for (var C = 0; C != data[R].length; ++C) {
                 var cellRef = _xlsx2.default.utils.encode_cell({ c: C + xSteps, r: rowCount });

src/ExcelPlugin/utils/DataUtil.js

@@ -51,16 +51,26 @@ const excelSheetFromDataSet = (dataSet) => {
 
         rowCount += ySteps;
 
+        var columnsWidth = []
         if (columns.length >= 0) {
             columns.forEach((col, index) => {
                 var cellRef = XLSX.utils.encode_cell({c: xSteps + index, r: rowCount});
                 fixRange(range, 0, 0, rowCount, xSteps, ySteps);
-                getHeaderCell(col, cellRef, ws);
+                var colTitle = col;
+                if (typeof col === 'object'){
+                    colTitle = col.title;
+                    columnsWidth.push(col.width || {wpx:80}); /* wch (chars), wpx (pixels) - e.g. [{wch:6},{wpx:50}] */
+                }
+                getHeaderCell(colTitle, cellRef, ws);
             });
 
             rowCount += 1;
         }
 
+        if (columnsWidth.length > 0){
+            ws['!cols'] = columnsWidth;
+        }
+
         for (var R = 0; R != data.length; ++R, rowCount++) {
             for (var C = 0; C != data[R].length; ++C) {
                 var cellRef = XLSX.utils.encode_cell({c: C + xSteps, r: rowCount});