Better Coding for grid.mixin.ExportBase.

static/plugin_dbui/src/grid/mixin/ExportBase.js

@@ -23,36 +23,32 @@ Ext.define('App.grid.mixin.ExportBase', {
             alignments = [],
             columns,
             container,
-            i,
-            label,
+            header,
             labels = [];
 
         container = me.getDockedItems('headercontainer');
+        header = container.length === 1 ? container[0] : null;
+        columns = header.getVisibleGridColumns();
 
-        if (container.length) {
-            columns = container[0].getVisibleGridColumns();
+        Ext.Array.each(columns, function (column) {
 
-            for (i = 0; i < columns.length; i += 1) {
+            var align, label;
 
-                // the label of the RowNumberer column is a non breaking space
-                // replace it by an empty space to avoid crash in latex processing
-                label = columns[i].text;
-                if (label === "&#160") {
-                    label = "";
-                }
-                labels.push(label);
+            // column alignment
+            align = column.align || 'left';
+            alignments.push(align);
 
-                if (columns[i].align) {
-                    alignments.push(columns[i].align);
-                } else {
-                    alignments.push('left');
-                }
-            }
-        }
+            // the label of the RowNumberer column is a non breaking space
+            // replace it by an empty space to avoid crash in latex processing
+            label = column.text;
+            label = (label === "&#160" ? "" : label);
+            labels.push(label);
+
+        });
 
         return {
             alignments: alignments,
-            hidden: container[0].isHidden(),
+            hidden: header.isHidden(),
             labels: labels
         };
     }