window: fixup clipboard on macos

window/Cargo.toml

@@ -57,6 +57,7 @@ memmap = {version="0.7", optional=true}
 [target.'cfg(target_os="macos")'.dependencies]
 cocoa = "0.20"
 objc = "0.2"
+clipboard = "0.5"
 core-foundation = "0.7"
 core-graphics = "0.19"
 cgl = { version = "0.3", optional = true }

window/src/lib.rs

@@ -222,14 +222,10 @@ pub trait WindowOps {
         R: Send + 'static;
 
     /// Initiate textual transfer from the clipboard
-    fn get_clipboard(&self) -> Future<String> {
-        Future::err(failure::err_msg("no clip"))
-    }
+    fn get_clipboard(&self) -> Future<String>;
 
     /// Set some text in the clipboard
-    fn set_clipboard(&self, _text: String) -> Future<()> {
-        Future::err(failure::err_msg("no clip"))
-    }
+    fn set_clipboard(&self, text: String) -> Future<()>;
 }
 
 pub trait WindowOpsMut {

window/src/os/macos/window.rs

@@ -463,6 +463,24 @@ impl WindowOps for Window {
             }
         })
     }
+
+    fn get_clipboard(&self) -> Future<String> {
+        use clipboard::ClipboardProvider;
+        Future::result(
+            clipboard::ClipboardContext::new()
+                .and_then(|mut ctx| ctx.get_contents())
+                .map_err(|e| failure::format_err!("Failed to get clipboard: {}", e)),
+        )
+    }
+
+    fn set_clipboard(&self, text: String) -> Future<()> {
+        use clipboard::ClipboardProvider;
+        Future::result(
+            clipboard::ClipboardContext::new()
+                .and_then(|mut ctx| ctx.set_contents(text))
+                .map_err(|e| failure::format_err!("Failed to set clipboard: {}", e)),
+        )
+    }
 }
 
 /// Convert from a macOS screen coordinate with the origin in the bottom left