thumbnails stretched on desktop 20.04 after previous bug fix release

[TJ]

I updated all packages from the update branch and in the last week or two the pdfs on my desktop are displayed incorrectly and stretched out. It appears that I did not have the bug prior to the fix, but have it now that I have updated to the new package version.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2017-07-03 (1147 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
NonfreeKernelModules: nvidia_modeset nvidia
Package: gnome-shell-extension-desktop-icons 20.04.0-3~ubuntu20.04.1
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Tags: focal
Uname: Linux 5.4.0-42-generic x86_64
UpgradeStatus: Upgraded to focal on 2020-04-28 (118 days ago)
UserGroups: adbusers adm cdrom dialout dip lpadmin plugdev sambashare sudo tty uucp video
_MarkForUpload: True

[Daniel van Vugt (vanvugt)]

Please:

1. Run this command to send us more information about the system:

   apport-collect 1892276

2. Report the bug to the developers at

   https://gitlab.gnome.org/World/ShellExtensions/desktop-icons/-/issues

   and then tell us the new issue ID.

[TJ (slydude123)]

apport information

[TJ (slydude123)]

apport information

[TJ (slydude123)]

I have run the command as requested and opened a new issue for gnome. The issue number is #216.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Nathan Jessurun (ntjess)]

Minor additional information:
- Also affects Ubuntu 20.10
- Stretching does not occur in the File Explorer Nautilus window, just the desktop preview.

[Tengda Han (htd95)]

A possible fix:
In https://gitlab.gnome.org/World/ShellExtensions/desktop-icons/-/blob/master/fileItem.js#L373 (or locally /usr/share/gnome-shell/extensions/desktop-icons@csoriano/fileItem.js):
Replace: `let containerWidth = (this._icon.allocation.x2 - this._icon.allocation.x1) * scaleFactor;`
with `let containerWidth = (this._icon.allocation.x2 - this._icon.allocation.x1);`

The scaleFactor here is unnecessary.

[Tengda Han (htd95)]

Tested on Ubuntu 20.04.1, with display scale 200%. Desktop thumbnails work fine after removing the scaleFactor multiplier as above.

[GilgongoJones (gilgongo)]

Confirm htd95's fileItem.js fixes this for me on newly upgraded Ubuntu 20.04.2.