feat: decode OneNote ink strokes

tests/content-model.test.ts

@@ -44,6 +44,24 @@ describe('OneNote rich-content model', () => {
     expect(model.pages[0]!.text).toContain('TEST\tD');
     expect(blocks.some((block) => block.kind === 'table')).toBe(true);
     expect(blocks.some((block) => block.kind === 'image')).toBe(true);
+    const ink = blocks.filter((block) => block.kind === 'ink');
+    expect(ink).toHaveLength(11);
+    expect(
+      ink
+        .flatMap((block) => block.strokes)
+        .reduce((total, stroke) => total + stroke.points.length, 0)
+    ).toBe(1316);
+    expect(ink[0]!.strokes[0]!.points.slice(0, 3)).toEqual([
+      { x: 3360, y: 5848 },
+      { x: 3360, y: 5854 },
+      { x: 3360, y: 5860 },
+    ]);
+    expect(ink[0]!.boundingBox).toEqual({
+      x: 2152,
+      y: 5848,
+      width: 1208,
+      height: 3992,
+    });
 
     const testing = textBlock(blocks, 'Testing!');
     expect(testing.runs.map((run) => run.text)).toEqual(['Testing', '!']);
@@ -86,6 +104,7 @@ describe('OneNote rich-content model', () => {
     const diagnosticCodes = model.diagnostics.map(({ code }) => code);
     expect(diagnosticCodes).not.toContain('CONTENT_PARSE_FAILED');
     expect(diagnosticCodes).not.toContain('INVALID_TABLE_VECTOR');
+    expect(diagnosticCodes).not.toContain('INK_STROKE_PARSE_FAILED');
   });
 
   it('associates only allow-listed hyperlink marker targets', () => {
@@ -101,6 +120,24 @@ describe('OneNote rich-content model', () => {
       unsafe.runs.find((run) => run.text === 'Example')?.href
     ).toBeUndefined();
   });
+
+  it('bounds aggregate ink point expansion', () => {
+    const model = parseOneNoteSectionContent(fixture, {
+      limits: { maxInkPoints: 100 },
+    });
+    expect(model.diagnostics).toContainEqual(
+      expect.objectContaining({
+        code: 'INK_STROKE_PARSE_FAILED',
+        message: expect.stringContaining('Ink point count exceeds 100'),
+      })
+    );
+    const blocks = model.pages.flatMap((page) => collectBlocks(page.blocks));
+    const parsedPoints = blocks
+      .filter((block) => block.kind === 'ink')
+      .flatMap((block) => block.strokes)
+      .reduce((total, stroke) => total + stroke.points.length, 0);
+    expect(parsedPoints).toBeLessThanOrEqual(100);
+  });
 });
 
 function parseSyntheticLink(href: string): OneNoteTextBlock {