Adding upstream version 43.9.upstream/43.9upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

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+## 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][common] 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][colors]   | 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] | drawing helper mixings/functions to allow easier definition of widget drawing under specific context. This is why Adwaita isn't 15000 LOC. |
+| [_common.scss][common]   | 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][sass-web]. Once you make your
+changes to the [_common.scss][common] file, you can run ninja to generate the
+final CSS files.
+
+[common]: data/theme/gnome-shell-sass/_common.scss
+[colors]: data/theme/gnome-shell-sass/_colors.scss
+[drawing]: data/theme/gnome-shell-sass/_drawing.scss
+[sass-web]: http://sass-lang.com/documentation/