Introduce write method to Clipboard trait

native/src/clipboard.rs

@@ -3,4 +3,7 @@
 pub trait Clipboard {
     /// Reads the current content of the [`Clipboard`] as text.
     fn read(&self) -> Option<String>;
+
+    /// Writes the given text contents to the [`Clipboard`].
+    fn write(&mut self, contents: String);
 }

winit/src/clipboard.rs

@@ -16,4 +16,11 @@ impl iced_native::Clipboard for Clipboard {
     fn read(&self) -> Option<String> {
         self.0.read().ok()
     }
+
+    fn write(&mut self, contents: String) {
+        match self.0.write(contents) {
+            Ok(()) => {}
+            Err(error) => log::warn!("error writing to clipboard: {}", error),
+        }
+    }
 }