feat(monospace): embed TTF into pandoc-generated DOCX

2026-08-02 18:10:18 +05:30 · 2026-07-23 09:34:57 +05:30
parent 001c9463e3
commit 992c6b72d6
2 changed files with 111 additions and 0 deletions
@@ -0,0 +1,65 @@
+const fs = require('fs');
+const path = require('path');
+const os = require('os');
+const JSZip = require('jszip');
+
+const { embedDocxFont } = require('../../../../src/main/DocxFontEmbedder');
+
+async function makeMinimalDocx(outPath) {
+  const zip = new JSZip();
+  zip.file(
+    '[Content_Types].xml',
+    '<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"></Types>'
+  );
+  zip.file(
+    '_rels/.rels',
+    '<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"></Relationships>'
+  );
+  zip.file('word/document.xml', '<w:document xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"/>');
+  const buf = await zip.generateAsync({ type: 'nodebuffer' });
+  fs.writeFileSync(outPath, buf);
+}
+
+describe('DocxFontEmbedder', () => {
+  let tmpDir;
+  beforeEach(() => {
+    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'mono-docx-'));
+  });
+  afterEach(() => {
+    fs.rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  test('embeds TTF into word/fonts and updates rels', async () => {
+    const input = path.join(tmpDir, 'in.docx');
+    const output = path.join(tmpDir, 'out.docx');
+    const ttf = path.join(tmpDir, 'JetBrainsMono-Regular.ttf');
+    await makeMinimalDocx(input);
+    fs.writeFileSync(ttf, Buffer.from([0x01, 0x00, 0x00, 0x00, 0x00]));
+
+    await embedDocxFont(input, output, ttf, 'JetBrainsMono');
+
+    const result = await JSZip.loadAsync(fs.readFileSync(output));
+    const fontFiles = Object.keys(result.files).filter((n) => n.startsWith('word/fonts/'));
+    expect(fontFiles.length).toBeGreaterThan(0);
+    const rels = result.file('word/_rels/fontTable.xml.rels');
+    expect(rels).toBeTruthy();
+    const relsContent = await rels.async('string');
+    expect(relsContent).toContain('.ttf');
+  });
+
+  test('returns rejected promise for invalid docx input', async () => {
+    const input = path.join(tmpDir, 'invalid.docx');
+    const output = path.join(tmpDir, 'out.docx');
+    const ttf = path.join(tmpDir, 'JetBrainsMono-Regular.ttf');
+    fs.writeFileSync(input, Buffer.from('not a docx'));
+    fs.writeFileSync(ttf, Buffer.from([0x01]));
+    await expect(embedDocxFont(input, output, ttf, 'JetBrainsMono')).rejects.toThrow();
+  });
+
+  test('throws if ttf missing', async () => {
+    const input = path.join(tmpDir, 'in.docx');
+    const output = path.join(tmpDir, 'out.docx');
+    await makeMinimalDocx(input);
+    await expect(embedDocxFont(input, output, '/nope.ttf', 'JetBrainsMono')).rejects.toThrow(/TTF/);
+  });
+});