1678982 - Clicking in the middle of the Scale arrows increases the scale while having a caret displayed

Status: NEW

(Toolkit :: Printing, defect, P4)

Description

[Alexandru Trif, Desktop QA [:atrif]]

Attachment: print.gif

Affected versions

• 83.0 (20201112153044)
• 84.0b4 (20201122152513)
• 85.0a1 (20201122213806)

Affected platforms

• Windows 10x64
• macOS 10.14
• Windows 7x64

Steps to reproduce

1. Open Firefox and new print preview UI.
2. Click on More Settings and Select the Scale option.
3. Position the mouse in the middle of the Scale arrows.
4. Press the left click mouse button.

Expected result

• Caret is not displayed and nothing happens on click.

Actual result

• Caret is displayed and size is increased.

Regression range

• I will search for one ASAP.

Notes

• Attached a screen recording.
• The caret is also displayed on Ubuntu 18.0.4 but the value is not changed on click.

Suggested Severity: S4

Comment 1

[Alexandru Trif, Desktop QA [:atrif]]

Hello! Attaching the regression range made on Windows 10x64:
Last good revision: 8d5f33309c2588c9eec55ca50577bdf5918e232d
First bad revision: a7d229c67a22dab01374cc33d3c3aaaa3d7c9015
Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=8d5f33309c2588c9eec55ca50577bdf5918e232d&tochange=a7d229c67a22dab01374cc33d3c3aaaa3d7c9015

Comment 2

[Jonathan Kew [:jfkthame]]

This reproduces for me on macOS only if the window is on a lo-dpi display. On the hi-dpi (retina) display, the mouse pointer moves directly from the up to down arrows (or vice versa), but on a lo-dpi screen there's one pixel at the boundary where neither arrow button is highlighted, and the cursor reverts to an I-beam.

Comment 3

[Mark Striemer [:mstriemer]]

The arrow icon sizes can differ as well at certain UI scaling levels, see bug 1670912.

Comment 4

[Blake Winton (:bwinton) (:☕️)]

(Moving bugs to 86, part 1.)

Comment 5

[Blake Winton (:bwinton) (:☕️)]

Moving things to 88, cause we're mostly on Proton these days…