92ccfe7f65
Commit a72c95de changed the focus style for all system entries to a more neutral color, as the stronger focus often clashes with the wallpaper background on the lock screen. However that is not a concern for entries that appear over the neutral system background. Worse, the neutral focus indication provides so little contrast with the background there that is not much of an indication anymore. Address this by restoring the old focus indication for the generic system_entry mix-in, but override it specifically on the lock screen to avoid the clash with the wallpaper background. Fixes a72c95de Closes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/6945 Closes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/6880 Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2922>
Summary
Do not edit the CSS directly, edit the source SCSS files and the CSS files will be generated automatically when building with meson + ninja and left inside the build directory to be incorporated into the gresource XML (you'll need to have sassc installed).
How to tweak the theme
Adwaita is a complex theme, so to keep it maintainable it's written and processed in SASS, the generated CSS is then transformed into a gresource file during gtk build and used at runtime in a non-legible or editable form.
It is very likely your change will happen in the _common.scss file. That's where all the widget selectors are defined. Here's a rundown of the "supporting" stylesheets, that are unlikely to be the right place for a drive by stylesheet fix:
| File | Description |
|---|---|
| _colors.scss | global color definitions. We keep the number of defined colors to a necessary minimum, most colors are derived from a handful of basics. It is an exact copy of the gtk+ counterpart. Light theme is used for the classic theme and dark is for GNOME3 shell default. |
| _drawing.scss | drawing helper mixings/functions to allow easier definition of widget drawing under specific context. This is why Adwaita isn't 15000 LOC. |
| _common.scss | actual definitions of style for each widget. This is where you are likely to add/remove your changes. |
You can read about SASS on its web page. Once you make your changes to the _common.scss file, you can run ninja to generate the final CSS files.