Unable to open relative links

[rongcuid]

Description

In preview window, when I click on a link to relative file, it does not open (either InEditor or InPreview).

System Information

Version: 1.54.3
Commit: 2b9aebd5354a3629c3aba0a5f5df49f43d6689f8
Date: 2021-03-15T10:55:24.277Z
Electron: 11.3.0
Chrome: 87.0.4280.141
Node.js: 12.18.3
V8: 8.7.220.31-electron.0
OS: Linux x64 5.8.0-7642-generic

To Reproduce

1. In a directory, create A.adoc and B.adoc. Fill in random contents.
2. In A.adoc, create a relative link by:
   • link:B.adoc, or
   • <<B.adoc#>>
3. Try to click on link in preview window

Any other combination of outfilesuffix or relfilesuffix result in the same behavior.

[rongcuid]

OK, I triangulated the problem, but I am unable to solve it due to unfamiliarity with VSCode or TS:

src/features/preview.ts:133, here the extension registers a WebView callback onDidReceiveMessage which handles the link clicking and various other features. However, this closure is never executed. I don't know if it failed to register or something.

[rongcuid]

OK, it doesn't make sense. The callback seems to be fine, but nothing in index.ts gets executed. There lies the code to actually send the clickLink events, etc.

[rongcuid]

I found the issue:
index.ts:137 supports only file: and vscode-resource: protocol. However, using the Webview debug window, I find that the links are actually vscode-webview-resource: protocol, and seem to follow a different format.

I checked the VSCode Markdown extension, and find that instead of processing inside the index.ts script which is run in Webview, it instead lets the backend resolve the URI. I am working on refactoring this part to do the same. This modification will also allow passthrough, though I am not sure what it may be used for.

For reference:
https://github.com/microsoft/vscode/blob/main/extensions/markdown-language-features/preview-src/index.ts