collapse button not showing up when opened in new window

[aeschli]

Moved from microsoft/vscode#126889

Hereby attaching images which replicates this issues.

1. open a new window from File > New Window.
   
2. drag and drop one of file on new window.
   
   as you can see in the above image collapse buttons are now visible.
3. now drag and drop another file in new tab of new window.
   
4. now click on first tab of new window.
   

as you can see the above image collapse buttons are not visible.
This issue may be specific to .vue files, attaching files for reference.
vue-files.zip

[aeschli]

The dev tools console shows multiple errors that are likely the reason for the missing indicators:

log.ts:301 ERR Unhandled method textDocument/foldingRange: Error: Unhandled method textDocument/foldingRange
at /home/martin/.vscode-insiders/extensions/octref.vetur-0.34.1/dist/vueMain.js:1:64858
at /home/martin/.vscode-insiders/extensions/octref.vetur-0.34.1/dist/vueMain.js:1:65153
at Immediate. (/home/martin/.vscode-insiders/extensions/octref.vetur-0.34.1/dist/vueMain.js:1:65518)
at processImmediate (internal/timers.js:461:21)

[yoyo930021]

Vetur doesn't support a single file.
Please open a Vue project in VSCode window.

@shirodkarpushkar

[shirodkarpushkar]

Hi @yoyo930021 ,

The image which you are seeing above is from a Vue project. I usually require to open a file in new window for keeping reference of a code, for getting a better view in a separate screen.

It came to my notice that it happens for .vue files only . It would be better if this extension supports single file also like all other frameworks.

Reagrds,
Pushkar

[yoyo930021]

Hi @yoyo930021 ,

The image which you are seeing above is from a Vue project. I usually require to open a file in new window for keeping reference of a code, for getting a better view in a separate screen.

It came to my notice that it happens for .vue files only . It would be better if this extension supports single file also like all other frameworks.

Reagrds, Pushkar

You open a new session when you open VSCode windows.
VSCode windows are independent of the other.

[shirodkarpushkar]

similar thing is also observed in new session of vscode

[yoyo930021]

@shirodkarpushkar If you only want collapse, you can refer to this link.
#2308 (comment)