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fix: preserve colored blocks in PDF-to-Word (#500)

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This commit is contained in:
SnapOtter
2026-07-11 19:20:32 +08:00
committed by GitHub
parent 430b87eda0
commit e7cfc00fe1
7 changed files with 270 additions and 26 deletions
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tests/fixtures/gen-synthetic-content.mjs
Vendored
+24 -2
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@@ -23,6 +23,7 @@ import { createRequire } from "node:module";
const __dirname = dirname(fileURLToPath(import.meta.url));
const IMAGE_VALID = join(__dirname, "image/valid");
const DOC_VALID = join(__dirname, "document/valid");
const DOC_EDGE = join(__dirname, "document/edge");
const require = createRequire(join(__dirname, "../../apps/api/package.json"));
const sharp = require("sharp");
const QRCode = require("qrcode");
@@ -111,7 +112,10 @@ function barcodeSvg(text, width, height) {
// ── Minimal PDF generator ──────────────────────────────────
function generatePdf(pageCount) {
function generatePdf(
pageCount,
contentForPage = (page) => `BT /F1 24 Tf 72 700 Td (Page ${page}) Tj ET`,
) {
const objects = [];
let nextObj = 1;
const addObj = (content) => {
@@ -126,7 +130,7 @@ function generatePdf(pageCount) {
const pageIds = [];
for (let i = 1; i <= pageCount; i++) {
const stream = `BT /F1 24 Tf 72 700 Td (Page ${i}) Tj ET`;
const stream = contentForPage(i);
const sId = addObj(`<< /Length ${stream.length} >>\nstream\n${stream}\nendstream`);
const pId = addObj(
`<< /Type /Page /Parent ${pagesId} 0 R /MediaBox [0 0 612 792] ` +
@@ -157,6 +161,19 @@ function generatePdf(pageCount) {
return Buffer.from(pdf, "binary");
}
const COLORED_BLOCK_STREAM = [
"0.12 0.52 0.72 rg",
"72 520 240 65 re f",
"BT",
"/F1 14 Tf",
"1 1 1 rg",
"84 562 Td",
"(BLOCK LINE ONE) Tj",
"0 -24 Td",
"(BLOCK LINE TWO) Tj",
"ET",
].join("\n");
// ── SVG logo (project-owned, replaces ConvertICO brand) ───
function projectSvg() {
@@ -310,6 +327,11 @@ async function main() {
console.log("PDFs:");
writeIfMissing(join(DOC_VALID, "alt-2page.pdf"), generatePdf(2), "alt-2page.pdf");
writeIfMissing(join(DOC_VALID, "multipage-6.pdf"), generatePdf(6), "multipage-6.pdf");
writeIfMissing(
join(DOC_EDGE, "colored-block.pdf"),
generatePdf(1, () => COLORED_BLOCK_STREAM),
"colored-block.pdf",
);
// ── SVG logo (B: replaces ConvertICO brand) ──
console.log("SVG logo (replacing ConvertICO brand):");