Issue with some pdfs

[Gozala]

For whatever reason pushpin seems to have issue with a following pdf https://tools.ietf.org/pdf/rfc2557.pdf

[pvh]

I've seen this before. I see a ton of errors in the console like this:

Warning: getPathGenerator - ignoring character: "Error: Requesting object that isn't resolved yet Courier_path_).".
C:\Users\pvh\Dev\pushpin\node_modules\pdfjs-dist\build\pdf.js:549 Warning: getPathGenerator - ignoring character: "Error: Requesting object that isn't resolved yet Courier_path_".".
C:\Users\pvh\Dev\pushpin\node_modules\pdfjs-dist\build\pdf.js:549 Warning: getPathGenerator - ignoring character: "Error: Requesting object that isn't resolved yet Courier_path_z.".
C:\Users\pvh\Dev\pushpin\node_modules\pdfjs-dist\build\pdf.js:549 Warning: getPathGenerator - ignoring character: "Error: Requesting object that isn't resolved yet Courier_path_[.".
C:\Users\pvh\Dev\pushpin\node_modules\pdfjs-dist\build\pdf.js:549 Warning: getPathGenerator - ignoring character: "Error: Requesting object that isn't resolved yet Courier_path_F.".
C:\Users\pvh\Dev\pushpin\node_modules\pdfjs-dist\build\pdf.js:549 Warning: getPathGenerator - ignoring character: "Error: Requesting object that isn't resolved yet Courier_path_8.".

I think this is a bug in how I've set up PDF.js and remember seeing something about it in the FAQ. Hopefully any easy fix with easy confirmation.

[Gozala]

I tried hypothesis on that pdf as I recall them using pdf.js and it seems to work fine in their embedding https://via.hypothes.is/https://tools.ietf.org/pdf/rfc2557.pdf#annotations:zUk5UDM2Eeq1FYMkzSVmuw

[Gozala]

I suppose that is their embedding https://github.com/hypothesis/pdf.js-hypothes.is

[Gozala]

I made some changes to try and follow instructions for cmaps here https://www.npmjs.com/package/react-pdf

diff --git a/webpack.config.ts b/webpack.config.ts
index ab3abd69..bb1c18ff 100644
--- a/webpack.config.ts
+++ b/webpack.config.ts
@@ -239,6 +239,12 @@ export default [
         chunks: ['background'],
         filename: 'background.html',
       }),
+      new CopyPlugin([
+        {
+          from: 'node_modules/pdfjs-dist/cmaps/',
+          to: 'assets/pdfjs-cmaps/',
+        },
+      ]),
       ...(isDev
         ? [
             new HardSourcePlugin({

diff --git a/src/renderer/components/content-types/files/PdfContent.tsx b/src/renderer/components/content-types/files/PdfContent.tsx
index bcf633ce..ac0d1907 100644
--- a/src/renderer/components/content-types/files/PdfContent.tsx
+++ b/src/renderer/components/content-types/files/PdfContent.tsx
@@ -118,7 +118,14 @@ export default function PdfContent(props: ContentProps) {
     <>
       {header}
       {buffer ? (
-        <Document file={{ data: buffer }} onLoadSuccess={onDocumentLoadSuccess}>
+        <Document
+          file={{ data: buffer }}
+          onLoadSuccess={onDocumentLoadSuccess}
+          options={{
+            cMapUrl: '/assets/pdfjs-cmaps/',
+            cMapPacked: true,
+          }}
+        >
           <Page
             loading=""
             pageNumber={pageNum}

But I see no requests for cmaps and issues still seem to be present.

[Gozala]

This seems relevant https://github.com/wojtekmaj/react-pdf/issues/275

[Gozala]

Tried following to see if the problem was with electron:

document.documentElement.innerHTML = "<iframe style='width: 100%;height:100%;top:0;left:0;position:fixed;'src='https://via.hypothes.is/https://tools.ietf.org/pdf/rfc2557.pdf#annotations:zUk5UDM2Eeq1FYMkzSVmuw'>"

Seems to work as expected and there seems to be no requests to cmap files

[Gozala]

I am now suspecting that hypothesis might be doing this https://github.com/mozilla/pdf.js/issues/4244#issuecomment-463865708

[Gozala]

Surprisingly setting a following setting disableFontFace: false makes it work. I don't see a way to switch pages but that might be unrelated.

[Gozala]

This does not seem ideal as per docs https://mozilla.github.io/pdf.js/api/draft/module-pdfjsLib.html

By default fonts are converted to OpenType fonts and loaded via font face rules. If disabled, fonts will be rendered using a built-in font renderer that constructs the glyphs with primitive path commands. The default value is false.

[Gozala]

Some poking around debugger also showed that font that causes error is 'Courier' with 'monospace' fallback. However there seems to be no compiled glimpse and that is why those errors are logged.