UI: Route text clipboard writes through egui (#1239)

Co-Authored-By: GPT-6 Luna <noreply@openai.com>

apps/figcraft/src/main.rs

@@ -244,14 +244,15 @@ fn main() -> eframe::Result {
     let result = eframe::run_native(
         "FigCraft",
         options,
-        Box::new(move |_cc| {
+        Box::new(move |cc| {
+            with_app(|fig| fig.services.set_egui_context(&cc.egui_ctx));
             Ok(Box::new(App {
                 queue,
                 ctx_slot,
                 title: String::new(),
                 recovery,
                 #[cfg(target_os = "macos")]
-                apple_events: apple_events.connect(&_cc.egui_ctx),
+                apple_events: apple_events.connect(&cc.egui_ctx),
             }))
         }),
     );

apps/figcraft/src/services.rs

@@ -11,6 +11,7 @@ use serde_json::{Value, json};
 
 pub struct Desktop {
     clipboard: Option<arboard::Clipboard>,
+    egui_ctx: Option<egui::Context>,
     /// Where the preferences live ([`config_dir`]).
     dir: Option<PathBuf>,
     pub prefs: Option<Prefs>,
@@ -54,7 +55,7 @@ impl Desktop {
         let reduce_motion = Arc::new(AtomicBool::new(false));
         let flag = reduce_motion.clone();
         std::thread::spawn(move || flag.store(system_reduce_motion(), Ordering::Relaxed));
-        Self { clipboard: arboard::Clipboard::new().ok(), dir, prefs, reduce_motion, language: system_language(), recovery }
+        Self { clipboard: arboard::Clipboard::new().ok(), egui_ctx: None, dir, prefs, reduce_motion, language: system_language(), recovery }
     }
 }
 
@@ -277,10 +278,13 @@ impl Services for Desktop {
         picked(dialog(title).pick_folder())
     }
     fn clipboard_set_text(&mut self, s: &str) {
-        if let Some(c) = self.clipboard.as_mut() {
-            let _ = c.set_text(s.to_string());
+        if let Some(ctx) = &self.egui_ctx {
+            ctx.copy_text(s.to_string());
         }
     }
+    fn set_egui_context(&mut self, ctx: &egui::Context) {
+        self.egui_ctx = Some(ctx.clone());
+    }
     fn clipboard_get_text(&mut self) -> Option<String> {
         read_clipboard(self.clipboard.as_mut()?, |c| c.get_text().ok())
     }

crates/ui-egui/src/lib.rs

@@ -272,6 +272,8 @@ pub trait Services {
         Box::pin(std::future::ready(None))
     }
     fn clipboard_set_text(&mut self, _s: &str) {}
+    /// Give native services access to the window context for platform clipboard output.
+    fn set_egui_context(&mut self, _ctx: &egui::Context) {}
     fn clipboard_get_text(&mut self) -> Option<String> {
         None
     }
@@ -387,9 +389,8 @@ impl Wake for RepaintWaker {
 pub struct NoServices;
 impl Services for NoServices {}
 
-/// Put `text` on the system clipboard through egui's output, which the browser shell writes while
-/// it handles the copy event (the only time a page may write it). For shells without a clipboard
-/// of their own.
+/// Put `text` on the system clipboard through egui's platform output. Native integrations handle
+/// it directly; the browser shell writes it while handling the copy event.
 pub fn egui_copy_text(ctx: &egui::Context, text: &str) {
     ctx.copy_text(text.to_string());
 }

crates/ui-egui/src/text_enter_tests.rs

@@ -59,6 +59,30 @@ fn enter_edits_a_selected_text_with_all_of_it_selected_and_escape_keeps_the_laye
     assert!(u.app.session.selection().is_empty());
 }
 
+#[test]
+fn copying_and_cutting_selected_text_use_clipboard_service() {
+    use std::{cell::RefCell, rc::Rc};
+
+    struct Clipboard(Rc<RefCell<Vec<String>>>);
+    impl crate::Services for Clipboard {
+        fn clipboard_set_text(&mut self, text: &str) {
+            self.0.borrow_mut().push(text.to_string());
+        }
+    }
+
+    let mut s = Session::new();
+    let t = NodeId(s.execute("text.create", &json!({"text": "Hello world", "x": 20, "y": 20})).unwrap()["id"].as_u64().unwrap());
+    s.execute("select.set", &json!({"ids": [t]})).unwrap();
+    let mut u = Ui::new(s);
+    let copied = Rc::new(RefCell::new(Vec::new()));
+    u.app.services = Box::new(Clipboard(copied.clone()));
+    press(&mut u, Key::Enter);
+    u.frame_output(vec![Event::Copy]);
+    u.frame_output(vec![Event::Cut]);
+    assert_eq!(&*copied.borrow(), &["Hello world", "Hello world"]);
+    assert_eq!(u.app.session.doc().unwrap().node(t).unwrap().kind.text().unwrap().characters, "");
+}
+
 #[test]
 fn a_new_file_takes_the_page_colour_of_the_theme_and_keeps_it() {
     let mut s = Session::new();