Port · Build: Zed's gpui at 1a28cff

gpui and gpui_platform now come from Zed's repo by git at 1a28cff,
the code gpui-pre 0.3.7 republishes, so the gallery can later build
for the browser. gpui takes stacker, as 0.2.2 always did, and
gpui_platform takes font-kit, without which macOS draws no text;
runtime_shaders moves to gpui_platform.

The API moved: focus, blur and Tab steps take cx, Corner is Anchor,
shaped lines paint with an alignment, defer_draw takes a content
mask, the inspector registers a factory, async updates return their
value, and wrapped lines are shared, not cloned. Updates through a
window context go through the window, so a closed window still ends
them as it did.

Where the new gpui behaves differently, Ely keeps its old intent.
Holds and reveals under a resting pointer survive typing through
gpui's input-modality-independent hover; previews the keyboard also
moves keep the default, and the calendar's leave ignores a key press.
Enter reaches a button inside the code editor, since gpui now arms a
key click on the press. The event logger skips a lone modifier. A
video and an image grid keep their shape in a flex column under
taffy 0.13, as a picture does.

AGENTS.md records the new stack and the rules this port changes; the
rest of the old gpui and taffy rules are re-tested in T44c.

src/misc/calculator.rs

@@ -266,7 +266,7 @@ impl RenderOnce for Calculator {
             .focus_ring(cx)
             .on_mouse_down(MouseButton::Left, {
                 let focus = focus.clone();
-                move |_, window, _| window.focus(&focus)
+                move |_, window, cx| window.focus(&focus, cx)
             })
             .on_key_down({
                 let tape = tape.clone();

src/misc/captcha.rs

@@ -90,7 +90,7 @@ impl RenderOnce for Captcha {
         let verify = tab_stop((id.clone(), "verify").into(), !passed, window, cx);
         if passed && field.read(cx).focus().is_focused(window) {
             log::info!("captcha: passed; focus goes to the mark");
-            window.focus(&verify);
+            window.focus(&verify, cx);
         }
         let checking = self.state == CaptchaState::Checking;
         let answer = {
@@ -101,13 +101,13 @@ impl RenderOnce for Captcha {
                 }
                 let text = SharedString::from(field.read(cx).text().trim().to_string());
                 if text.is_empty() {
-                    window.focus(field.read(cx).focus());
+                    window.focus(&field.read(cx).focus().clone(), cx);
                     return;
                 }
                 log::info!("captcha: answered");
                 on_answer(&text, window, cx);
                 field.update(cx, |field, cx| field.set_text("", cx));
-                window.focus(field.read(cx).focus());
+                window.focus(&field.read(cx).focus().clone(), cx);
             })
         };
         let theme = cx.theme();

src/misc/clock.rs

@@ -54,7 +54,8 @@ fn each_second(id: impl Into<ElementId>, window: &mut Window, cx: &mut App) {
                 cx.background_executor()
                     .timer(Duration::from_nanos(1_000_000_000 - past))
                     .await;
-                if ticker.update(cx, |_, cx| cx.notify()).is_err() {
+                let ticked = cx.update(|_, cx| ticker.update(cx, |_, cx| cx.notify()));
+                if ticked.and_then(|inner| inner).is_err() {
                     return;
                 }
             }

src/misc/poll.rs

@@ -190,7 +190,7 @@ impl RenderOnce for Poll {
                         let ix = picked.expect("Vote waits for a pick");
                         log::info!("poll: voted for option {ix}");
                         on_vote(Some(ix), window, cx);
-                        window.focus(&focus);
+                        window.focus(&focus, cx);
                     })
             }
             Some(_) => Button::new((id.clone(), "change"), "Change vote")

src/misc/quiz.rs

@@ -276,7 +276,7 @@ impl RenderOnce for Quiz {
                             if let (true, Some(on_score)) = (finishing, &on_score) {
                                 on_score(score, count, window, cx);
                             }
-                            window.focus(&focus);
+                            window.focus(&focus, cx);
                         }),
                 ),
             )

src/misc/stopwatch.rs

@@ -123,7 +123,7 @@ impl RenderOnce for Stopwatch {
                     cx.notify();
                 });
                 if let Some(then) = &then {
-                    window.focus(then);
+                    window.focus(then, cx);
                 }
             }
         };

src/misc/survey.rs

@@ -271,7 +271,7 @@ impl RenderOnce for Survey {
                                     sheet.sent = true;
                                     cx.notify();
                                 });
-                                window.focus(&focus);
+                                window.focus(&focus, cx);
                             }),
                     ),
             )

src/misc/tests/mod.rs

@@ -63,7 +63,7 @@ pub(super) fn stage(
     let wakes = Rc::new(Cell::new(0));
     let count = wakes.clone();
     cx.update(|window, cx| {
-        window.focus(&root);
+        window.focus(&root, cx);
         cx.observe(&view, move |_, _| count.set(count.get() + 1))
             .detach();
     });

src/misc/tests/notices.rs

@@ -148,7 +148,7 @@ fn consent_hands_focus_back_to_its_opener(cx: &mut TestAppContext) {
         button: cx.focus_handle(),
     });
     let button = view.read_with(cx, |opener, _| opener.button.clone());
-    cx.update(|window, _| window.focus(&button));
+    cx.update(|window, cx| window.focus(&button, cx));
     settle(cx);
     press("enter", cx);
     press("tab", cx);

src/misc/tests/transfer.rs

@@ -268,7 +268,7 @@ fn answered_from_button(part: fn() -> AnyElement, tabs: usize, cx: &mut TestAppC
         part,
     });
     let button = view.read_with(cx, |opener, _| opener.button.clone());
-    cx.update(|window, _| window.focus(&button));
+    cx.update(|window, cx| window.focus(&button, cx));
     settle(cx);
     press("enter", cx);
     for _ in 0..tabs {