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mozilla/pdf.js

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This commit is contained in:
Andreas Knuth
2026-07-15 22:31:10 -05:00
parent 5c69c40453
commit ba16f5fe06
4 changed files with 172 additions and 5 deletions
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1
deno.json
View File

@@ -2,6 +2,7 @@
"name": "bizmatch-qc-desktop",
"version": "0.1.3",
"exports": "./main.ts",
"unstable": ["raw-imports"],
"imports": {
"@std/assert": "jsr:@std/assert@^1",
"@std/path": "jsr:@std/path@^1",

154
main.ts
View File

@@ -25,6 +25,147 @@ import PDFJS_LIB_TEXT from "pdfjs-dist/legacy/build/pdf.min.mjs" with {
import PDFJS_WORKER_TEXT from "pdfjs-dist/legacy/build/pdf.worker.min.mjs" with {
type: "text",
};
// PDF.js >= 5 needs these auxiliary assets at runtime (fetched by the worker):
// - wasm/: CCITT-G4 + JBIG2 (B/W scans), JPEG2000 and qcms (ICC) decoders
// - standard_fonts/: base-14 font substitutes for PDFs without embedded fonts
// - iccs/: default CMYK ICC profile
// Embedded via import attributes so the compiled desktop binary stays self-contained.
import WASM_JBIG2 from "pdfjs-dist/wasm/jbig2.wasm" with { type: "bytes" };
import WASM_OPENJPEG from "pdfjs-dist/wasm/openjpeg.wasm" with {
type: "bytes",
};
import WASM_QCMS from "pdfjs-dist/wasm/qcms_bg.wasm" with { type: "bytes" };
import JS_JBIG2_FALLBACK from "pdfjs-dist/wasm/jbig2_nowasm_fallback.js" with {
type: "text",
};
import JS_OPENJPEG_FALLBACK from "pdfjs-dist/wasm/openjpeg_nowasm_fallback.js" with {
type: "text",
};
import ICC_CGATS from "pdfjs-dist/iccs/CGATS001Compat-v2-micro.icc" with {
type: "bytes",
};
import FONT_DINGBATS from "pdfjs-dist/standard_fonts/FoxitDingbats.pfb" with {
type: "bytes",
};
import FONT_FIXED from "pdfjs-dist/standard_fonts/FoxitFixed.pfb" with {
type: "bytes",
};
import FONT_FIXED_B from "pdfjs-dist/standard_fonts/FoxitFixedBold.pfb" with {
type: "bytes",
};
import FONT_FIXED_BI from "pdfjs-dist/standard_fonts/FoxitFixedBoldItalic.pfb" with {
type: "bytes",
};
import FONT_FIXED_I from "pdfjs-dist/standard_fonts/FoxitFixedItalic.pfb" with {
type: "bytes",
};
import FONT_SERIF from "pdfjs-dist/standard_fonts/FoxitSerif.pfb" with {
type: "bytes",
};
import FONT_SERIF_B from "pdfjs-dist/standard_fonts/FoxitSerifBold.pfb" with {
type: "bytes",
};
import FONT_SERIF_BI from "pdfjs-dist/standard_fonts/FoxitSerifBoldItalic.pfb" with {
type: "bytes",
};
import FONT_SERIF_I from "pdfjs-dist/standard_fonts/FoxitSerifItalic.pfb" with {
type: "bytes",
};
import FONT_SYMBOL from "pdfjs-dist/standard_fonts/FoxitSymbol.pfb" with {
type: "bytes",
};
import FONT_LSANS from "pdfjs-dist/standard_fonts/LiberationSans-Regular.ttf" with {
type: "bytes",
};
import FONT_LSANS_B from "pdfjs-dist/standard_fonts/LiberationSans-Bold.ttf" with {
type: "bytes",
};
import FONT_LSANS_BI from "pdfjs-dist/standard_fonts/LiberationSans-BoldItalic.ttf" with {
type: "bytes",
};
import FONT_LSANS_I from "pdfjs-dist/standard_fonts/LiberationSans-Italic.ttf" with {
type: "bytes",
};
const PDFJS_ASSETS: Record<
string,
{ body: Uint8Array | string; type: string }
> = {
"/pdfjs/wasm/jbig2.wasm": { body: WASM_JBIG2, type: "application/wasm" },
"/pdfjs/wasm/openjpeg.wasm": {
body: WASM_OPENJPEG,
type: "application/wasm",
},
"/pdfjs/wasm/qcms_bg.wasm": { body: WASM_QCMS, type: "application/wasm" },
"/pdfjs/wasm/jbig2_nowasm_fallback.js": {
body: JS_JBIG2_FALLBACK,
type: "text/javascript; charset=utf-8",
},
"/pdfjs/wasm/openjpeg_nowasm_fallback.js": {
body: JS_OPENJPEG_FALLBACK,
type: "text/javascript; charset=utf-8",
},
"/pdfjs/iccs/CGATS001Compat-v2-micro.icc": {
body: ICC_CGATS,
type: "application/vnd.iccprofile",
},
"/pdfjs/standard_fonts/FoxitDingbats.pfb": {
body: FONT_DINGBATS,
type: "application/octet-stream",
},
"/pdfjs/standard_fonts/FoxitFixed.pfb": {
body: FONT_FIXED,
type: "application/octet-stream",
},
"/pdfjs/standard_fonts/FoxitFixedBold.pfb": {
body: FONT_FIXED_B,
type: "application/octet-stream",
},
"/pdfjs/standard_fonts/FoxitFixedBoldItalic.pfb": {
body: FONT_FIXED_BI,
type: "application/octet-stream",
},
"/pdfjs/standard_fonts/FoxitFixedItalic.pfb": {
body: FONT_FIXED_I,
type: "application/octet-stream",
},
"/pdfjs/standard_fonts/FoxitSerif.pfb": {
body: FONT_SERIF,
type: "application/octet-stream",
},
"/pdfjs/standard_fonts/FoxitSerifBold.pfb": {
body: FONT_SERIF_B,
type: "application/octet-stream",
},
"/pdfjs/standard_fonts/FoxitSerifBoldItalic.pfb": {
body: FONT_SERIF_BI,
type: "application/octet-stream",
},
"/pdfjs/standard_fonts/FoxitSerifItalic.pfb": {
body: FONT_SERIF_I,
type: "application/octet-stream",
},
"/pdfjs/standard_fonts/FoxitSymbol.pfb": {
body: FONT_SYMBOL,
type: "application/octet-stream",
},
"/pdfjs/standard_fonts/LiberationSans-Regular.ttf": {
body: FONT_LSANS,
type: "font/ttf",
},
"/pdfjs/standard_fonts/LiberationSans-Bold.ttf": {
body: FONT_LSANS_B,
type: "font/ttf",
},
"/pdfjs/standard_fonts/LiberationSans-BoldItalic.ttf": {
body: FONT_LSANS_BI,
type: "font/ttf",
},
"/pdfjs/standard_fonts/LiberationSans-Italic.ttf": {
body: FONT_LSANS_I,
type: "font/ttf",
},
};
const PREFIX = "[BizMatch QC]";
@@ -452,6 +593,17 @@ Deno.serve(async (request) => {
});
}
// ---- PDF.js auxiliary assets (wasm decoders, standard fonts, ICC) ----
const pdfjsAsset = PDFJS_ASSETS[url.pathname];
if (pdfjsAsset) {
return new Response(pdfjsAsset.body as BodyInit, {
headers: {
"content-type": pdfjsAsset.type,
"cache-control": "public, max-age=86400",
},
});
}
// ---- PDF.js library assets ----
if (url.pathname === "/pdfjs/legacy/pdf.min.mjs") {
return new Response(PDFJS_LIB_TEXT, {
@@ -613,4 +765,4 @@ try {
);
}
win.show();
win.show();

13
web/app.js
View File

@@ -1,6 +1,7 @@
let state;
let groups = [];
let selectedIndex = -1;
let loadedIndex = -1; // which document the PDF viewer currently shows/loads
let pdfViewer = null;
let loadRequestId = 0;
@@ -116,10 +117,14 @@ async function loadPdf(index) {
const doc = state.documents[index];
if (!doc) return;
// Deduplicate: don't reload the same document
if (index === selectedIndex && pdfViewer) {
// Deduplicate: don't reload the document that is already shown.
// NOTE: must compare against loadedIndex, NOT selectedIndex --
// select() updates selectedIndex before calling loadPdf(), so a
// selectedIndex comparison is always true and blocks every reload.
if (index === loadedIndex && pdfViewer) {
return;
}
loadedIndex = index;
if (pdfViewer) {
pdfViewer.destroy();
@@ -164,6 +169,7 @@ async function loadPdf(index) {
console.log(`[BizMatch QC] PDF ${reqId} rendering complete`);
} catch (error) {
if (index !== selectedIndex) return;
loadedIndex = -1; // allow retry: clicking the same document again reloads it
const message = error instanceof Error ? error.message : String(error);
pdfMessage.textContent = `Cannot open PDF: ${message}`;
pdfMessage.hidden = false;
@@ -281,6 +287,7 @@ async function load() {
throw new Error(`State request failed with HTTP ${response.status}.`);
}
state = await response.json();
loadedIndex = -1; // document set changed; index-based dedup is invalid now
groups = buildGroups(state.documents);
showError(state.loadError || "");
renderList();
@@ -290,4 +297,4 @@ async function load() {
}
}
void load();
void load();

9
web/pdf_viewer.js
View File

@@ -71,6 +71,13 @@ class PdfViewer {
url,
rangeChunkSize: 65536,
disableAutoFetch: false,
// PDF.js >= 5 decodes CCITT-G4/JBIG2 (B/W scans), JPEG2000 and ICC
// color via WASM modules fetched from wasmUrl. Without these URLs
// the decoders fail silently (ignoreErrors default) and scanned
// pages render as blank white canvases of the correct size.
wasmUrl: "/pdfjs/wasm/",
standardFontDataUrl: "/pdfjs/standard_fonts/",
iccUrl: "/pdfjs/iccs/",
});
this.loadingTask = task;
@@ -259,4 +266,4 @@ function errorMsg(err) {
return err instanceof Error ? err.message : String(err);
}
globalThis.PdfViewer = PdfViewer;
globalThis.PdfViewer = PdfViewer;