feat(config): add CosmicTk config for configuring window controls

src/app/core.rs

@@ -3,6 +3,7 @@
 
 use std::collections::HashMap;
 
+use crate::config::CosmicTk;
 use cosmic_config::CosmicConfigEntry;
 use cosmic_theme::ThemeMode;
 use iced_core::window::Id;
@@ -63,6 +64,9 @@ pub struct Core {
     /// Configured theme mode
     pub(super) system_theme_mode: ThemeMode,
 
+    /// Libcosmic toolkit configuration.
+    pub(super) toolkit_config: CosmicTk,
+
     pub(super) portal_is_dark: Option<bool>,
 
     pub(super) portal_accent: Option<Srgba>,
@@ -101,8 +105,18 @@ impl Default for Core {
             system_theme_mode: ThemeMode::config()
                 .map(|c| {
                     ThemeMode::get_entry(&c).unwrap_or_else(|(errors, mode)| {
-                        for e in errors {
-                            tracing::error!("{e}");
+                        for why in errors {
+                            tracing::error!(?why, "ThemeMode config entry error");
+                        }
+                        mode
+                    })
+                })
+                .unwrap_or_default(),
+            toolkit_config: CosmicTk::config()
+                .map(|c| {
+                    CosmicTk::get_entry(&c).unwrap_or_else(|(errors, mode)| {
+                        for why in errors {
+                            tracing::error!(?why, "CosmicTk config entry error");
                         }
                         mode
                     })

src/app/cosmic.rs

@@ -4,6 +4,7 @@
 use std::sync::Arc;
 
 use super::{command, Application, ApplicationExt, Core, Subscription};
+use crate::config::CosmicTk;
 use crate::theme::{self, Theme, ThemeType, THEME};
 use crate::widget::nav_bar;
 use crate::{keyboard_nav, Element};
@@ -49,14 +50,16 @@ pub enum Message {
     NavBar(nav_bar::Id),
     /// Set scaling factor
     ScaleFactor(f32),
-    /// Toggles visibility of the nav bar.
-    ToggleNavBar,
-    /// Toggles the condensed status of the nav bar.
-    ToggleNavBarCondensed,
     /// Notification of system theme changes.
     SystemThemeChange(Vec<&'static str>, Theme),
     /// Notification of system theme mode changes.
     SystemThemeModeChange(Vec<&'static str>, ThemeMode),
+    /// Toggles visibility of the nav bar.
+    ToggleNavBar,
+    /// Toggles the condensed status of the nav bar.
+    ToggleNavBarCondensed,
+    /// Toolkit configuration update
+    ToolkitConfig(CosmicTk),
     /// Updates the window maximized state
     WindowMaximized(window::Id, bool),
     /// Updates the tracked window geometry.
@@ -182,6 +185,16 @@ where
 
         let mut subscriptions = vec![
             self.app.subscription().map(super::Message::App),
+            self.app
+                .core()
+                .watch_config::<crate::config::CosmicTk>(crate::config::toolkit::ID)
+                .map(|update| {
+                    for why in update.errors {
+                        tracing::error!(?why, "cosmic toolkit config update error");
+                    }
+
+                    super::Message::Cosmic(Message::ToolkitConfig(update.config))
+                }),
             self.app
                 .core()
                 .watch_config::<cosmic_theme::Theme>(if self.app.core().system_theme_mode.is_dark {
@@ -190,8 +203,8 @@ where
                     cosmic_theme::LIGHT_THEME_ID
                 })
                 .map(|update| {
-                    for e in update.errors {
-                        tracing::error!("{e}");
+                    for why in update.errors {
+                        tracing::error!(?why, "cosmic theme config update error");
                     }
                     Message::SystemThemeChange(
                         update.keys,
@@ -540,6 +553,10 @@ impl<T: Application> Cosmic<T> {
             Message::DesktopSettings(crate::theme::portal::Desktop::Contrast(_)) => {
                 // TODO when high contrast is integrated in settings and all custom themes
             }
+
+            Message::ToolkitConfig(config) => {
+                self.app.core_mut().toolkit_config = config;
+            }
         }
 
         iced::Command::none()

src/app/mod.rs

@@ -704,11 +704,11 @@ impl<App: Application> ApplicationExt for App {
                         header = header.start(toggle);
                     }
 
-                    if core.window.show_maximize {
+                    if core.window.show_maximize && core.toolkit_config.show_maximize {
                         header = header.on_maximize(Message::Cosmic(cosmic::Message::Maximize));
                     }
 
-                    if core.window.show_minimize {
+                    if core.window.show_minimize && core.toolkit_config.show_minimize {
                         header = header.on_minimize(Message::Cosmic(cosmic::Message::Minimize));
                     }
 

src/config/mod.rs

@@ -0,0 +1,7 @@
+// Copyright 2024 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+//! Configurations available to libcosmic applications.
+
+pub mod toolkit;
+pub use toolkit::CosmicTk;

src/config/toolkit.rs

@@ -0,0 +1,35 @@
+// Copyright 2024 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+//! Configurations for the libcosmic toolkit.
+
+use cosmic_config::cosmic_config_derive::CosmicConfigEntry;
+use cosmic_config::{Config, CosmicConfigEntry};
+
+/// ID for the `CosmicTk` config.
+pub const ID: &str = "com.system76.CosmicTk";
+
+#[derive(Clone, CosmicConfigEntry, Debug, Eq, PartialEq)]
+#[version = 1]
+pub struct CosmicTk {
+    /// Show minimize button in window header.
+    pub show_minimize: bool,
+
+    /// Show maximize button in window header.
+    pub show_maximize: bool,
+}
+
+impl Default for CosmicTk {
+    fn default() -> Self {
+        Self {
+            show_minimize: true,
+            show_maximize: true,
+        }
+    }
+}
+
+impl CosmicTk {
+    pub fn config() -> Result<Config, cosmic_config::Error> {
+        Config::new(ID, Self::VERSION)
+    }
+}

src/lib.rs

@@ -4,7 +4,7 @@
 #![allow(clippy::module_name_repetitions)]
 
 #[cfg(all(feature = "wayland", feature = "winit"))]
-compile_error!("cannot use `wayland` feature with `winit");
+compile_error!("cannot use `wayland` feature with `winit`");
 
 /// Recommended default imports.
 pub mod prelude {
@@ -26,6 +26,9 @@ pub mod applet;
 
 pub use iced::Command;
 pub mod command;
+
+pub mod config;
+
 pub use cosmic_config;
 pub use cosmic_theme;