DPI-based font scaling for Mono

[HebaruSan]

Motivation

Pixels are smaller than they used to be. 96 DPI was traditional, but 120 and 144 DPI are now common. I recently upgraded to a 144 DPI setup, and the CKAN GUI looks quite tiny and hard to read in Linux.

#4543 addressed this for Windows by switching to DPI-based auto-scaling and point-based font sizes. Mono's WinForms implementation seems to auto scale the sizes of controls based on those things, but not the fonts.

#4465 did some work for configurable font scaling, but it needed some new tests to avoid decreasing the coverage percentage and wasn't finished.

Changes

• Now when the GUI loads in Mono, we adjust the font sizes to fit the DPI if it's not 96. The font should be visually about the same size and readability on all displays regardless of their pixel density.
• Several more hard-coded font sizes are eliminated
• We now set WebClient.Encoding to UTF-8, which is a superior solution to [Bug]: Abstracts from GitHub API replace non-ASCII characters with question marks #4288 than Set unicode-aware locale in containers #4289 because it will work regardless of how the surrounding environment is set up.

Fixes #878.

[coveralls]

Coverage Report for CI Build 24449855110

Coverage decreased (-0.1%) to 85.427%

Details

• Coverage decreased (-0.1%) from the base build.
• Patch coverage: 6 of 6 lines across 3 files are fully covered (100%).
• 18 coverage regressions across 2 files.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

18 previously-covered lines in 2 files lost coverage.

File	Lines Losing Coverage	Coverage
Core/Games/KerbalSpaceProgram/GameVersionProviders/KspBuildMap.cs	15	59.41%
Core/Net/NetFileCache.cs	3	90.33%

---

Coverage Stats

Relevant Lines:	14229
Covered Lines:	12001
Line Coverage:	84.34%
Relevant Branches:	2164
Covered Branches:	2003
Branch Coverage:	92.56%
Branches in Coverage %:	Yes
Coverage Strength:	1.76 hits per line

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💛 - Coveralls

[codereptile]

OMG LET'S GOOOOO. Waited for this for sooo long))

[hivert]

Would it be possible to make a special release for this one ? It seems that it is a long awaited feature ? Thanks !

[HebaruSan]

@hivert, there are already dev builds available that include all recent changes:

• https://github.com/KSP-CKAN/CKAN/blob/master/doc/apt-repo.md#nightly-builds
• https://github.com/KSP-CKAN/CKAN/blob/master/doc/rpm-repo.md#nightly-builds
• https://ksp-ckan.s3-us-west-2.amazonaws.com/ckan.exe

... and there will be a regular release of this soon enough.

[Real-Gecko]

Hey, glad that you picked up the torch and was able to complete the task.