[vscode] terminals resizing issues on reload

[akosyakov]

Bug description

On page reload the content is not nicely resized.

Steps to reproduce

• Start a workspace with VS Code
• Reload the page and output should be nicely formatted.
• But it is rendered narrowly instead.

There are also strange messages in terminals on start sometimes:

your 131072x1 screen size is bogus. expect trouble

Expected behavior

No response

Example repository

No response

[akosyakov]

I was able to reproduce by removing focus from the window, i.e. opening another tab while reloading. The theory is that we push data while terminal did not compute proper sizes yet, so it is rendering everything with default, i.e. 1 cols, 1 rows.

[akosyakov]

I used bogus initial resize sizes, i.e. (1, 1). It should be (0, 0) then they are overidden by initial resize. I will fix in the context of #3694

[jankeromnes]

I was just able to reproduce this issue, twice in a row, by opening:

https://akosyakov-unable-to-open-files-3874.staging.gitpod-dev.com/#https://github.com/whatwg/html

in Firefox Nightly (88) on Mac OS.

This is the preview environment of #4040 that was just merged into Gitpod Core.