Tree view scrolling and overflow fitting breaks on Linux

[miloofcroton]

Edit: I found a duplicate of this issue.

This is the same issue that I'm having: #1379

Issue and Steps to Reproduce

I have a HiDPI screen on my Dell XPS laptop, so when I am using the laptop's screen as a display, I use Gnome 3's ability to scale everything at 200%. If I use an external monitor, I just use the normal 100%. Atom doesn't change while it is running to fit these scales, but it will respond to the scale when first opened in a given environment.

I did not have this problem before, but since updating Nuclide and Atom from roughly year-old versions (sorry, I forget the exact numbers), the tree view no longer has a scroll down bar, and the buttons at the bottom of that view don't fit the size of the tree view area. This is only if I open Atom in a 200% scale state according to Gnome 3's settings. If It's opened at 100%, it's fine.

This could be an issue for anyone who uses Atom on a high DPI laptop with Linux, or it might be specific to my OS and/or desktop environment.

Expected Behavior

The items in the tree view should fit the view.

Actual Behavior

The items in the tree view overflow. The files go off the view vertically, and the buttons go off the view horizontally. There is no vertical scrollbar, nor can I reproduce a horizontal scrollbar (despite seeing one in the screenshot I took; I am flummoxed).

Versions

• Atom: 1.25.1
• Nuclide: 0.296.0
• Electron: 1.7.11
• Chrome: 58.0.3029.110
• Node: 7.9.0
• Client OS: Ubuntu 17.10
• Gnome: 3.26.2

Additional Details

├── Hydrogen@2.4.0
├── atom-material-syntax@1.0.8
├── atom-material-ui@2.1.3
├── atom-unsaved-changes@0.4.0
├── autocomplete-python@1.10.5
├── autocomplete-ruby@0.2.8 (disabled)
├── dbg@1.6.3
├── jekyll@2.1.0 (disabled)
├── jekyll-snippets@0.3.2
├── markdown-mindmap@0.4.2
├── navigate@0.1.20
├── nuclide@0.296.0
├── platformio-ide-terminal@2.8.1
├── python-tools@0.6.9
├── stacktrace@0.0.2
├── symbol-gen@1.3.1
└── tree-view-extended@2.1.0 (disabled)

[captbaritone]

Thanks for the the PR 👏. I'll work on getting it merged. In the meantime, I'll close this as a duplicate of #1379.