feat(config): add active window border style opt

This commit adds a new active window border style configuration option
to komorebi.json, allowing users to explicitly opt in to square or
rounded active window borders to match whatever patches they may have
made at the system / dwm.exe level.

komorebi/src/lib.rs

@@ -194,6 +194,9 @@ lazy_static! {
         )
     };
 
+    static ref ACTIVE_WINDOW_BORDER_STYLE: Arc<Mutex<ActiveWindowBorderStyle>> =
+        Arc::new(Mutex::new(ActiveWindowBorderStyle::System));
+
     static ref BORDER_RECT: Arc<Mutex<Rect>> =
         Arc::new(Mutex::new(Rect::default()));
 

komorebi/src/static_config.rs

@@ -7,6 +7,7 @@ use crate::window_manager::WindowManager;
 use crate::window_manager_event::WindowManagerEvent;
 use crate::windows_api::WindowsApi;
 use crate::workspace::Workspace;
+use crate::ACTIVE_WINDOW_BORDER_STYLE;
 use crate::BORDER_COLOUR_CURRENT;
 use crate::BORDER_COLOUR_MONOCLE;
 use crate::BORDER_COLOUR_SINGLE;
@@ -82,6 +83,17 @@ pub struct ActiveWindowBorderColours {
     pub monocle: Colour,
 }
 
+#[derive(Default, Copy, Clone, Debug, Serialize, Deserialize, JsonSchema)]
+pub enum ActiveWindowBorderStyle {
+    #[default]
+    /// Use the system border style
+    System,
+    /// Use the Windows 11-style rounded borders
+    Rounded,
+    /// Use the Windows 10-style square borders
+    Square,
+}
+
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct WorkspaceConfig {
     /// Name
@@ -260,6 +272,9 @@ pub struct StaticConfig {
     /// Active window border colours for different container types
     #[serde(skip_serializing_if = "Option::is_none")]
     pub active_window_border_colours: Option<ActiveWindowBorderColours>,
+    /// Active window border style (default: System)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub active_window_border_style: Option<ActiveWindowBorderStyle>,
     /// Global default workspace padding (default: 10)
     #[serde(skip_serializing_if = "Option::is_none")]
     pub default_workspace_padding: Option<i32>,
@@ -411,6 +426,7 @@ impl From<&WindowManager> for StaticConfig {
             border_offset: Option::from(BORDER_OFFSET.load(Ordering::SeqCst)),
             active_window_border: Option::from(BORDER_ENABLED.load(Ordering::SeqCst)),
             active_window_border_colours: border_colours,
+            active_window_border_style: Option::from(*ACTIVE_WINDOW_BORDER_STYLE.lock()),
             default_workspace_padding: Option::from(
                 DEFAULT_WORKSPACE_PADDING.load(Ordering::SeqCst),
             ),
@@ -477,6 +493,9 @@ impl StaticConfig {
             BORDER_COLOUR_MONOCLE.store(u32::from(colours.monocle), Ordering::SeqCst);
         }
 
+        let active_window_border_style = self.active_window_border_style.unwrap_or_default();
+        *ACTIVE_WINDOW_BORDER_STYLE.lock() = active_window_border_style;
+
         let mut float_identifiers = FLOAT_IDENTIFIERS.lock();
         let mut regex_identifiers = REGEX_IDENTIFIERS.lock();
         let mut manage_identifiers = MANAGE_IDENTIFIERS.lock();

komorebi/src/windows_callbacks.rs

@@ -41,6 +41,8 @@ use crate::window_manager_event::WindowManagerEvent;
 use crate::windows_api::WindowsApi;
 use crate::winevent::WinEvent;
 use crate::winevent_listener;
+use crate::ActiveWindowBorderStyle;
+use crate::ACTIVE_WINDOW_BORDER_STYLE;
 use crate::BORDER_COLOUR_CURRENT;
 use crate::BORDER_RECT;
 use crate::BORDER_WIDTH;
@@ -232,10 +234,20 @@ pub extern "system" fn border_window(
                 // the window was made with DWMWCP_ROUNDSMALL then this is the
                 // wrong size.  In the future we should read the DWM properties
                 // of windows and attempt to match appropriately.
-                if *WINDOWS_11 {
-                    RoundRect(hdc, 0, 0, border_rect.right, border_rect.bottom, 20, 20);
-                } else {
-                    Rectangle(hdc, 0, 0, border_rect.right, border_rect.bottom);
+                match *ACTIVE_WINDOW_BORDER_STYLE.lock() {
+                    ActiveWindowBorderStyle::System => {
+                        if *WINDOWS_11 {
+                            RoundRect(hdc, 0, 0, border_rect.right, border_rect.bottom, 20, 20);
+                        } else {
+                            Rectangle(hdc, 0, 0, border_rect.right, border_rect.bottom);
+                        }
+                    }
+                    ActiveWindowBorderStyle::Rounded => {
+                        RoundRect(hdc, 0, 0, border_rect.right, border_rect.bottom, 20, 20);
+                    }
+                    ActiveWindowBorderStyle::Square => {
+                        Rectangle(hdc, 0, 0, border_rect.right, border_rect.bottom);
+                    }
                 }
                 EndPaint(window, &ps);
                 ValidateRect(window, None);