Reset Zoom sets zoom to 66%(?) instead of 100%

[Dingus357]

Expected behaviour

Reset Zoom sets zoom to 100%. (The tooltip for the Reset Zoom button on the toolbar says 'Reset zoom to 100%'.)

Actual behaviour

Reset Zoom does two unexpected things:

• A new zoom level somewhere between 50% and 70% (66%?) is apparently created and incorrectly shown to be 70%. This new zoom level isn't selectable from the dropdown menu in the toolbar but can be cycled through using Zoom In/Zoom Out.
• The document zoom is set to the newly created level.

Steps to reproduce the behaviour

Failure to reset zoom to 100%:

1. Open a PDF file and select any zoom level.
2. Do any one of the following:
   • Press Ctrl+0,
   • Select Reset Zoom from the View menu,
   • Click the Reset Zoom button on the toolbar.
3. Rather than being set to 100%, the zoom is set to a level claimed to be 70% (but as we will see below, it is actually less than 70%).

Unexpected creation of new zoom level:

1. Open a PDF file and select 70% zoom from the dropdown in the toolbar.
2. Do any one of the following:
   • Press Ctrl+0,
   • Select Reset Zoom from the View menu,
   • Click the Reset Zoom button on the toolbar.
3. Observe that the document shrinks slightly, but the zoom dropdown still displays 70%.
4. Zoom in once (press Ctrl++ or select Zoom In from View menu or toolbar). The document enlarges but the zoom is still shown to be 70%.
5. Zoom out once (Ctrl+- or select Zoom Out). The document shrinks but the zoom is still shown to be 70%.

These unexpected behaviours occur for all PDF files I've tested.

MATE general version

1.26.0

Package version

atril 1.26.0-1ubuntu1 amd64

Linux Distribution

Ubuntu MATE 22.04.2 LTS (Jammy Jellyfish) 64-bit Kernel Linux 5.15.0-60-generic x86_64

Link to bugreport of your Distribution (requirement)

[lukefromdc]

This is likely either related to or a duplicate of https://github.com/mate-desktop/atril/issues/575