Fix or promote leftover TODOs and GPUI APIs (#12514)

fixes https://github.com/zed-industries/zed/issues/11966

Release Notes:

- N/A

crates/gpui/src/platform/linux/platform.rs

@@ -38,9 +38,9 @@ use crate::platform::linux::xdg_desktop_portal::{should_auto_hide_scrollbars, wi
 use crate::{
     px, Action, AnyWindowHandle, BackgroundExecutor, ClipboardItem, CosmicTextSystem, CursorStyle,
     DisplayId, ForegroundExecutor, Keymap, Keystroke, LinuxDispatcher, Menu, MenuItem, Modifiers,
-    PathPromptOptions, Pixels, Platform, PlatformDisplay, PlatformInputHandler, PlatformTextSystem,
-    PlatformWindow, Point, PromptLevel, Result, SemanticVersion, Size, Task, WindowAppearance,
-    WindowOptions, WindowParams,
+    OwnedMenu, PathPromptOptions, Pixels, Platform, PlatformDisplay, PlatformInputHandler,
+    PlatformTextSystem, PlatformWindow, Point, PromptLevel, Result, SemanticVersion, Size, Task,
+    WindowAppearance, WindowOptions, WindowParams,
 };
 
 use super::x11::X11Client;
@@ -72,6 +72,7 @@ pub trait LinuxClient {
     fn write_to_clipboard(&self, item: ClipboardItem);
     fn read_from_primary(&self) -> Option<ClipboardItem>;
     fn read_from_clipboard(&self) -> Option<ClipboardItem>;
+    fn active_window(&self) -> Option<AnyWindowHandle>;
     fn run(&self);
 }
 
@@ -93,6 +94,7 @@ pub(crate) struct LinuxCommon {
     pub(crate) auto_hide_scrollbars: bool,
     pub(crate) callbacks: PlatformHandlers,
     pub(crate) signal: LoopSignal,
+    pub(crate) menus: Vec<OwnedMenu>,
 }
 
 impl LinuxCommon {
@@ -118,6 +120,7 @@ impl LinuxCommon {
             auto_hide_scrollbars,
             callbacks,
             signal,
+            menus: Vec::new(),
         };
 
         (common, main_receiver)
@@ -210,18 +213,21 @@ impl<P: LinuxClient + 'static> Platform for P {
         }
     }
 
-    // todo(linux)
-    fn activate(&self, ignoring_other_apps: bool) {}
-
-    // todo(linux)
-    fn hide(&self) {}
-
-    fn hide_other_apps(&self) {
-        log::warn!("hide_other_apps is not implemented on Linux, ignoring the call")
+    fn activate(&self, ignoring_other_apps: bool) {
+        log::info!("activate is not implemented on Linux, ignoring the call")
     }
 
-    // todo(linux)
-    fn unhide_other_apps(&self) {}
+    fn hide(&self) {
+        log::info!("hide is not implemented on Linux, ignoring the call")
+    }
+
+    fn hide_other_apps(&self) {
+        log::info!("hide_other_apps is not implemented on Linux, ignoring the call")
+    }
+
+    fn unhide_other_apps(&self) {
+        log::info!("unhide_other_apps is not implemented on Linux, ignoring the call")
+    }
 
     fn primary_display(&self) -> Option<Rc<dyn PlatformDisplay>> {
         self.primary_display()
@@ -231,9 +237,8 @@ impl<P: LinuxClient + 'static> Platform for P {
         self.displays()
     }
 
-    // todo(linux)
     fn active_window(&self) -> Option<AnyWindowHandle> {
-        None
+        self.active_window()
     }
 
     fn open_window(
@@ -387,15 +392,22 @@ impl<P: LinuxClient + 'static> Platform for P {
         Ok(exe_path)
     }
 
-    // todo(linux)
-    fn set_menus(&self, menus: Vec<Menu>, keymap: &Keymap) {}
+    fn set_menus(&self, menus: Vec<Menu>, _keymap: &Keymap) {
+        self.with_common(|common| {
+            common.menus = menus.into_iter().map(|menu| menu.owned()).collect();
+        })
+    }
+
+    fn get_menus(&self) -> Option<Vec<OwnedMenu>> {
+        self.with_common(|common| Some(common.menus.clone()))
+    }
+
     fn set_dock_menu(&self, menu: Vec<MenuItem>, keymap: &Keymap) {}
 
     fn local_timezone(&self) -> UtcOffset {
         UtcOffset::UTC
     }
 
-    //todo(linux)
     fn path_for_auxiliary_executable(&self, name: &str) -> Result<PathBuf> {
         Err(anyhow::Error::msg(
             "Platform<LinuxPlatform>::path_for_auxiliary_executable is not implemented yet",
@@ -549,7 +561,6 @@ impl CursorStyle {
             CursorStyle::ResizeUpDown => Shape::NsResize,
             CursorStyle::ResizeColumn => Shape::ColResize,
             CursorStyle::ResizeRow => Shape::RowResize,
-            CursorStyle::DisappearingItem => Shape::Grabbing, // todo(linux) - couldn't find equivalent icon in linux
             CursorStyle::IBeamCursorForVerticalLayout => Shape::VerticalText,
             CursorStyle::OperationNotAllowed => Shape::NotAllowed,
             CursorStyle::DragLink => Shape::Alias,
@@ -577,7 +588,6 @@ impl CursorStyle {
             CursorStyle::ResizeUpDown => "ns-resize",
             CursorStyle::ResizeColumn => "col-resize",
             CursorStyle::ResizeRow => "row-resize",
-            CursorStyle::DisappearingItem => "grabbing", // todo(linux) - couldn't find equivalent icon in linux
             CursorStyle::IBeamCursorForVerticalLayout => "vertical-text",
             CursorStyle::OperationNotAllowed => "not-allowed",
             CursorStyle::DragLink => "alias",