open as worspace implementation

src/workspace/workspaceSelection.ts

@@ -0,0 +1,31 @@
+import type { PageRef } from '../pdf/pdfTypes';
+
+export function getSelectedPagesInVisualOrder(
+  pages: PageRef[],
+  selectedPageIds: string[]
+): PageRef[] {
+  if (pages.length === 0 || selectedPageIds.length === 0) return [];
+
+  const selectedSet = new Set(selectedPageIds);
+  return pages.filter((page) => selectedSet.has(page.id));
+}
+
+export function createSelectionWorkspaceName(
+  pdfName: string,
+  selectedPageCount: number
+): string {
+  const baseName = pdfName.replace(/\.pdf$/i, '') || 'Untitled';
+  const suffix =
+    selectedPageCount === 1
+      ? '1-page-selection'
+      : `${selectedPageCount}-page-selection`;
+
+  return `${baseName} - ${suffix}`;
+}
+
+export function createSelectionPdfName(
+  pdfName: string,
+  selectedPageCount: number
+): string {
+  return `${createSelectionWorkspaceName(pdfName, selectedPageCount)}.pdf`;
+}