Updates org.freedesktop.impl.portal.Settings backend to v2.

- Added high-contrast setting.
- Added accent-color support.
- Refactored to make it easier to add new settings in the future.

Accent color currently attempts to get an accent color by:
- Matching the name with a static list (currently only Mint themes)
- Failing that, it checks a gsettings key.

debian/control

@@ -5,6 +5,7 @@ Maintainer: Linux Mint <[email protected]>
 Build-Depends:
  debhelper-compat (= 13),
  libglib2.0-dev (>= 2.44),
+ libgtk-3-dev (>= 3.0),
  meson (>= 0.53.0),
  systemd (>= 242),
  xdg-desktop-portal-dev (>= 1.7.1),

debian/rules

@@ -5,6 +5,11 @@ export DEB_BUILD_MAINT_OPTIONS = hardening=+all
 %:
 	dh $@
 
+
+override_dh_auto_configure:
+	dh_auto_configure -- \
+		--buildtype=debug
+
 override_dh_auto_install:
 	dh_auto_install --destdir=debian/tmp
 

src/meson.build

@@ -57,6 +57,8 @@ deps = [
   meson.get_compiler('c').find_library('m'),
   dependency('glib-2.0', version: '>= 2.44'),
   dependency('gio-unix-2.0'),
+  dependency('gtk+-3.0'),
+  dependency('gdk-3.0'),
   xdg_desktop_portal_dep,
 ]