[okular] [Bug 443403] Reduce the size of the digital signature display

[smihael]

https://bugs.kde.org/show_bug.cgi?id=443403

smihael <smihael at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |smihael at gmail.com

--- Comment #31 from smihael <smihael at gmail.com> ---
This particular issue has been bothering me for a long while, so I tried to
investigate if this could be addressed easily.

A quick solution is to add the following line:

pData->setFontSize(10);

to the following file:
https://invent.kde.org/graphics/okular/-/blob/release/23.08/generators/poppler/generator_pdf.cpp#L1382

Side note: After compiling Okular from source
(https://okular.kde.org/build-it/) make sure to also update the library path
(otherwise system version of the compiled generator_pdf will be called). 

At this point, I cannot make any pull request, because there are several other
things that should be addressed. The font size setting could be added to:
https://invent.kde.org/graphics/okular/-/blob/release/23.08/part/selectcertificatedialog.ui

However, the "signature is too small" warning dialogue is currently somewhat
arbitrary and based on fixed pixel size
(https://invent.kde.org/graphics/okular/-/blob/release/23.08/part/pageviewannotator.cpp#L358)
so without further changes the user would get the warning even with the smaller
font size.

A more adaptive solution (font size automatically determined from annotation
box size), would probably require changes in the poppler library.

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