feat(Settings): darken images on dark mode

data/dev.geopjr.Tuba.gschema.xml

@@ -82,6 +82,9 @@
 		<key name="spellchecker-enabled" type="b">
 			<default>true</default>
 		</key>
+		<key name="darken-images-on-dark-mode" type="b">
+			<default>false</default>
+		</key>
 
 		<key name="window-w" type="i">
 			<default>600</default>

data/style-dark.css

@@ -45,3 +45,7 @@
 .ttl-post.direct:hover {
 	background-color: lighter(alpha(@warning_bg_color, .1));
 }
+
+.ttl-darken-images avatar:not(:hover), .ttl-darken-images picture:not(:hover) {
+	filter: brightness(.8) contrast(1.2);
+}

data/ui/dialogs/preferences.ui

@@ -89,6 +89,11 @@
 								<property name="title" translatable="yes">Show Link Preview Cards</property>
 							</object>
 						</child>
+						<child>
+							<object class="AdwSwitchRow" id="darken_images_on_dark_mode">
+								<property name="title" translatable="yes">Darken images on dark mode</property>
+							</object>
+						</child>
 					</object>
 				</child>
 				<child>

src/Dialogs/MainWindow.vala

@@ -22,10 +22,15 @@ public class Tuba.Dialogs.MainWindow: Adw.ApplicationWindow, Saveable {
 		app.notify["is-mobile"].connect (update_selected_home_item);
 		media_viewer.bind_property ("visible", split_view, "can-focus", GLib.BindingFlags.SYNC_CREATE | GLib.BindingFlags.INVERT_BOOLEAN);
 		media_viewer.notify["visible"].connect (on_media_viewer_toggle);
+		settings.notify["darken-images-on-dark-mode"].connect (settings_updated);
 
 		app.toast.connect (add_toast);
 	}
 
+	private void settings_updated () {
+		Tuba.toggle_css (split_view, settings.darken_images_on_dark_mode, "ttl-darken-images");
+	}
+
 	private void add_toast (string content, uint timeout = 0) {
 		toast_overlay.add_toast (new Adw.Toast (content) {
 			timeout = timeout

src/Dialogs/Preferences.vala

@@ -25,6 +25,7 @@ public class Tuba.Dialogs.Preferences : Adw.PreferencesWindow {
     [GtkChild] unowned Adw.SwitchRow use_blurhash;
     [GtkChild] unowned Adw.SwitchRow group_push_notifications;
     [GtkChild] unowned Adw.SwitchRow advanced_boost_dialog;
+    [GtkChild] unowned Adw.SwitchRow darken_images_on_dark_mode;
 
     [GtkChild] unowned Adw.SwitchRow new_followers_notifications_switch;
     [GtkChild] unowned Adw.SwitchRow new_follower_requests_notifications_switch;
@@ -127,6 +128,7 @@ public class Tuba.Dialogs.Preferences : Adw.PreferencesWindow {
         settings.bind ("use-blurhash", use_blurhash, "active", SettingsBindFlags.DEFAULT);
         settings.bind ("group-push-notifications", group_push_notifications, "active", SettingsBindFlags.DEFAULT);
         settings.bind ("advanced-boost-dialog", advanced_boost_dialog, "active", SettingsBindFlags.DEFAULT);
+        settings.bind ("darken-images-on-dark-mode", darken_images_on_dark_mode, "active", SettingsBindFlags.DEFAULT);
 
 		post_visibility_combo_row.notify["selected-item"].connect (on_post_visibility_changed);
 

src/Services/Settings.vala

@@ -99,6 +99,7 @@ public class Tuba.Settings : GLib.Settings {
 	public bool advanced_boost_dialog { get; set; }
 	public bool reply_to_old_post_reminder { get; set; }
 	public bool spellchecker_enabled { get; set; }
+	public bool darken_images_on_dark_mode { get; set; }
 
 	private static string[] keys_to_init = {
 		"active-account",
@@ -120,7 +121,8 @@ public class Tuba.Settings : GLib.Settings {
 		"group-push-notifications",
 		"advanced-boost-dialog",
 		"reply-to-old-post-reminder",
-		"spellchecker-enabled"
+		"spellchecker-enabled",
+		"darken-images-on-dark-mode"
 	};
 
 	public Settings () {