Make primary clipboard Linux only (#11843)

I guess only Linux supports the primary clipboard.

Release Notes:

- N/A

crates/gpui/src/app.rs

@@ -547,6 +547,7 @@ impl AppContext {
 
     /// Writes data to the primary selection buffer.
     /// Only available on Linux.
+    #[cfg(target_os = "linux")]
     pub fn write_to_primary(&self, item: ClipboardItem) {
         self.platform.write_to_primary(item)
     }
@@ -558,6 +559,7 @@ impl AppContext {
 
     /// Reads data from the primary selection buffer.
     /// Only available on Linux.
+    #[cfg(target_os = "linux")]
     pub fn read_from_primary(&self) -> Option<ClipboardItem> {
         self.platform.read_from_primary()
     }

crates/gpui/src/platform.rs

@@ -147,8 +147,10 @@ pub(crate) trait Platform: 'static {
     fn set_cursor_style(&self, style: CursorStyle);
     fn should_auto_hide_scrollbars(&self) -> bool;
 
+    #[cfg(target_os = "linux")]
     fn write_to_primary(&self, item: ClipboardItem);
     fn write_to_clipboard(&self, item: ClipboardItem);
+    #[cfg(target_os = "linux")]
     fn read_from_primary(&self) -> Option<ClipboardItem>;
     fn read_from_clipboard(&self) -> Option<ClipboardItem>;
 

crates/gpui/src/platform/mac/platform.rs

@@ -817,8 +817,6 @@ impl Platform for MacPlatform {
         }
     }
 
-    fn write_to_primary(&self, _item: ClipboardItem) {}
-
     fn write_to_clipboard(&self, item: ClipboardItem) {
         let state = self.0.lock();
         unsafe {
@@ -856,10 +854,6 @@ impl Platform for MacPlatform {
         }
     }
 
-    fn read_from_primary(&self) -> Option<ClipboardItem> {
-        None
-    }
-
     fn read_from_clipboard(&self) -> Option<ClipboardItem> {
         let state = self.0.lock();
         unsafe {

crates/gpui/src/platform/test/platform.rs

@@ -23,6 +23,7 @@ pub(crate) struct TestPlatform {
     active_display: Rc<dyn PlatformDisplay>,
     active_cursor: Mutex<CursorStyle>,
     current_clipboard_item: Mutex<Option<ClipboardItem>>,
+    #[cfg(target_os = "linux")]
     current_primary_item: Mutex<Option<ClipboardItem>>,
     pub(crate) prompts: RefCell<TestPrompts>,
     pub opened_url: RefCell<Option<String>>,
@@ -45,6 +46,7 @@ impl TestPlatform {
             active_display: Rc::new(TestDisplay::new()),
             active_window: Default::default(),
             current_clipboard_item: Mutex::new(None),
+            #[cfg(target_os = "linux")]
             current_primary_item: Mutex::new(None),
             weak: weak.clone(),
             opened_url: Default::default(),
@@ -272,6 +274,7 @@ impl Platform for TestPlatform {
         false
     }
 
+    #[cfg(target_os = "linux")]
     fn write_to_primary(&self, item: ClipboardItem) {
         *self.current_primary_item.lock() = Some(item);
     }
@@ -280,6 +283,7 @@ impl Platform for TestPlatform {
         *self.current_clipboard_item.lock() = Some(item);
     }
 
+    #[cfg(target_os = "linux")]
     fn read_from_primary(&self) -> Option<ClipboardItem> {
         self.current_primary_item.lock().clone()
     }

crates/gpui/src/platform/windows/platform.rs

@@ -625,8 +625,6 @@ impl Platform for WindowsPlatform {
         false
     }
 
-    fn write_to_primary(&self, _item: ClipboardItem) {}
-
     fn write_to_clipboard(&self, item: ClipboardItem) {
         if item.text.len() > 0 {
             let mut ctx = ClipboardContext::new().unwrap();
@@ -634,10 +632,6 @@ impl Platform for WindowsPlatform {
         }
     }
 
-    fn read_from_primary(&self) -> Option<ClipboardItem> {
-        None
-    }
-
     fn read_from_clipboard(&self) -> Option<ClipboardItem> {
         let mut ctx = ClipboardContext::new().unwrap();
         let content = ctx.get_contents().ok()?;