Found in

• 107.0a1 (20221010033207)

Affected versions

• 107.0a1 (20221010033207)

Tested platforms

• Affected platforms: Windows 10x64, Ubuntu 20.04
• Unaffected platform: macOS 11.6

Steps to reproduce

1. Open http://foersom.com/net/HowTo/data/OoPdfFormExample.pdf.
2. Click on The Country dropdown and choose a value.

Expected result

• The text is properly displayed for each value.

Actual result

• Some values are slightly cut off.

Regression range

• Last good revision: 23c9a4c9b468b43106f50295a52422851d71dfda
  First bad revision: d9035fae6d3c0fd5bb6253561210fa05237c68e0
  Pushlog:
  https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=23c9a4c9b468b43106f50295a52422851d71dfda&tochange=d9035fae6d3c0fd5bb6253561210fa05237c68e0
  Potential regressor: bug 1792052.

Additional notes

• Attached a screenshot with the issue.
• I cannot reproduce the issue on macOS 11.5. On Windows 10x64 the issue is not so visible. The issue is more visible on Ubuntu 20.04.

It's because of:
https://github.com/mozilla/pdf.js/commit/07cd7cb3dce4a4af1d555002486c15a5ed4b5302#diff-4748c83592581d85910b4a948677ddfcd25c8dc68ffcd20c524e0f4f0739f51aR92
Reverting the border to 1px for choiceWidgetAnnotation is fixing the issue.

(In reply to Calixte Denizet (:calixte) from comment #1)

It's because of:
https://github.com/mozilla/pdf.js/commit/07cd7cb3dce4a4af1d555002486c15a5ed4b5302#diff-4748c83592581d85910b4a948677ddfcd25c8dc68ffcd20c524e0f4f0739f51aR92
Reverting the border to 1px for choiceWidgetAnnotation is fixing the issue.

Given that the border now takes up more space than before, should we perhaps reduce the font-size accordingly to compensate?

We should likely do something around:
https://github.com/mozilla/pdf.js/blob/master/src/display/annotation_layer.js#L986
Since it was ok for a border equals to 1px, likely removing 1 to the height should be enough.

Since this is reoccuring, we should try to add some kind of automated test.

We already have some tests for that, but the bug here depends of the default font used in the dropdown.

Verified fixed with Firefox 108.0a1 (2022-10-27) on Windows 10x64, macOS 12 and Ubuntu 20.04. The text is no longer clipped after following the steps from comment 0.