[IMP] export: export align left when the cell content is a number;

src/constants.ts

@@ -165,6 +165,8 @@ export const DEFAULT_STYLE = {
   textColor: "",
 } satisfies Required<Style>;
 
+export const DEFAULT_NUMBER_STYLE = { ...DEFAULT_STYLE, align: "right" } satisfies Required<Style>;
+
 export const DEFAULT_VERTICAL_ALIGN = DEFAULT_STYLE.verticalAlign;
 export const DEFAULT_WRAPPING_MODE = DEFAULT_STYLE.wrapping;
 

src/plugins/core/cell.ts

@@ -1,6 +1,6 @@
-import { DEFAULT_STYLE } from "../../constants";
+import { DEFAULT_NUMBER_STYLE, DEFAULT_STYLE } from "../../constants";
 import { Token, compile, tokenize } from "../../formulas";
-import { deepEquals } from "../../helpers";
+import { deepEquals, isNumber } from "../../helpers";
 import { parseLiteral } from "../../helpers/cells";
 import {
   concat,
@@ -266,7 +266,7 @@ export class CellPlugin extends CorePlugin<CoreState> implements CoreState {
       for (const position of positions) {
         const cell = this.getters.getCell(position)!;
         const xc = toXC(position.col, position.row);
-        const style = this.removeDefaultStyleValues(cell.style);
+        const style = this.extractCustomStyle(cell);
         cells[xc] = {
           style: Object.keys(style).length ? getItemId<Style>(style, styles) : undefined,
           format: cell.format ? getItemId<Format>(cell.format, formats) : undefined,
@@ -295,10 +295,14 @@ export class CellPlugin extends CorePlugin<CoreState> implements CoreState {
     this.export(data);
   }
 
-  private removeDefaultStyleValues(style: Style | undefined): Style {
-    const cleanedStyle = { ...style };
-    for (const property in DEFAULT_STYLE) {
-      if (cleanedStyle[property] === DEFAULT_STYLE[property]) {
+  private extractCustomStyle(cell: Cell): Style {
+    const cleanedStyle = { ...cell.style };
+    const defaultStyle = isNumber(cell.content, this.getters.getLocale())
+      ? DEFAULT_NUMBER_STYLE
+      : DEFAULT_STYLE;
+    for (const property in defaultStyle) {
+      if (property === "align" && cell.isFormula) continue;
+      if (cleanedStyle[property] === defaultStyle[property]) {
         delete cleanedStyle[property];
       }
     }

tests/cells/style_plugin.test.ts

@@ -95,6 +95,28 @@ describe("styles", () => {
     });
   });
 
+  test("align left is exported for number and formula but not text", () => {
+    const model = new Model();
+    setStyle(model, "A1:A3", { align: "left" });
+    setStyle(model, "B1:B3", { align: "right" });
+    setCellContent(model, "A1", "1");
+    setCellContent(model, "B1", "1");
+    setCellContent(model, "A2", "TEXT");
+    setCellContent(model, "B2", "TEXT");
+    setCellContent(model, "A3", "=1");
+    setCellContent(model, "B3", "=1");
+
+    const data = model.exportData();
+    expect(data.sheets[0].cells.A1?.style).toBe(1);
+    expect(data.sheets[0].cells.A2?.style).toBe(undefined);
+    expect(data.sheets[0].cells.B1?.style).toBe(undefined);
+    expect(data.sheets[0].cells.B2?.style).toBe(2);
+    expect(data.sheets[0].cells.A3?.style).toBe(1);
+    expect(data.sheets[0].cells.B3?.style).toBe(2);
+
+    expect(data.styles).toEqual({ 1: { align: "left" }, 2: { align: "right" } });
+  });
+
   test("clearing format on a cell with no content actually remove it", () => {
     const model = new Model();
     selectCell(model, "B1");