Preserve QExcell active sheet in XLSX

src/io/excellOffice.ts

@@ -4,6 +4,7 @@ import { officeTitleFromFileName, readOfficeFileAsArrayBuffer, XLSX_MIME_TYPE }
 
 export interface ImportedExcellWorkbook {
   title: string;
+  activeSheet?: string;
   sheets: Array<{
     id: string;
     name: string;
@@ -201,9 +202,11 @@ export async function importXlsxFile(file: File): Promise<ImportedExcellWorkbook
       return { ...parsedSheet, charts };
     })
   );
+  const activeSheet = workbookActiveSheetId(workbookXml, sheets);
 
   return {
     title: officeTitleFromFileName(file.name, "Книга QExcell.xlsx"),
+    ...(activeSheet ? { activeSheet } : {}),
     sheets
   };
 }
@@ -215,12 +218,13 @@ export async function exportXlsxBlob(workbook: Workbook): Promise<Blob> {
 
   const styleRegistry = createCellStyleRegistry(sheets.map((sheet) => sheet.cellFormats));
   const chartParts = chartPartRefsForSheets(sheets);
+  const activeSheetIndex = Math.max(0, sheets.findIndex((sheet) => sheet.id === workbook.activeSheet));
 
   zip.file("[Content_Types].xml", buildContentTypesXml(sheets.length, chartParts));
   zip.file("_rels/.rels", buildRootRelationshipsXml());
   zip.file("docProps/app.xml", buildAppPropertiesXml());
   zip.file("docProps/core.xml", buildCorePropertiesXml());
-  zip.file("xl/workbook.xml", buildWorkbookXml(sheets.map((sheet, index) => sheet.name.trim() || `Лист ${index + 1}`)));
+  zip.file("xl/workbook.xml", buildWorkbookXml(sheets.map((sheet, index) => sheet.name.trim() || `Лист ${index + 1}`), activeSheetIndex));
   zip.file("xl/_rels/workbook.xml.rels", buildWorkbookRelationshipsXml(sheets.length));
   zip.file("xl/styles.xml", buildStylesXml(styleRegistry));
 
@@ -636,6 +640,18 @@ export function workbookSheetRefs(workbookXml: unknown): WorkbookSheetRef[] {
   });
 }
 
+export function workbookActiveSheetId(workbookXml: unknown, sheets: Array<{ id: string }>): string {
+  const workbook = childRecord(workbookXml, "workbook");
+  const bookViews = childRecord(workbook, "bookViews");
+  const workbookView = asRecord(toArray(bookViews.workbookView)[0]);
+  const activeTab = Number.parseInt(String(workbookView.activeTab ?? workbookView["@_activeTab"] ?? ""), 10);
+  if (!Number.isInteger(activeTab) || activeTab < 0) {
+    return "";
+  }
+
+  return sheets[activeTab]?.id ?? "";
+}
+
 export function workbookRelationshipTargets(relationshipsXml: unknown) {
   const relationships = childRecord(relationshipsXml, "Relationships");
   const targets: Record<string, string> = {};
@@ -689,7 +705,9 @@ function buildRootRelationshipsXml() {
   );
 }
 
-function buildWorkbookXml(sheetNames: string[]) {
+function buildWorkbookXml(sheetNames: string[], activeSheetIndex = 0) {
+  const activeTab = Math.min(Math.max(0, activeSheetIndex), Math.max(0, sheetNames.length - 1));
+  const bookViews = `<bookViews><workbookView activeTab="${activeTab}"/></bookViews>`;
   const sheets = sheetNames
     .map((name, index) => {
       return `<sheet name="${escapeXmlAttribute(name)}" sheetId="${index + 1}" r:id="rId${index + 1}"/>`;
@@ -697,7 +715,7 @@ function buildWorkbookXml(sheetNames: string[]) {
     .join("");
 
   return xmlDeclaration(
-    `<workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"><sheets>${sheets}</sheets></workbook>`
+    `<workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">${bookViews}<sheets>${sheets}</sheets></workbook>`
   );
 }