input: Refactor window.focused_input by use better way to ensure update. (#809)

crates/story/src/input_story.rs

@@ -9,7 +9,7 @@ use gpui_component::{
     button::{Button, ButtonVariant, ButtonVariants as _},
     h_flex,
     input::{InputEvent, TextInput},
-    v_flex, FocusableCycle, Icon, IconName, Sizable,
+    v_flex, ContextModal, FocusableCycle, Icon, IconName, Root, Sizable,
 };
 
 actions!(input_story, [Tab, TabPrev]);
@@ -200,7 +200,7 @@ impl Focusable for InputStory {
 }
 
 impl Render for InputStory {
-    fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
         v_flex()
             .key_context(CONTEXT)
             .id("input-story")
@@ -239,6 +239,16 @@ impl Render for InputStory {
                     .max_w_md()
                     .child(self.input_esc.clone()),
             )
+            .child(
+                section("Focused Input")
+                    .max_w_md()
+                    .whitespace_normal()
+                    .overflow_hidden()
+                    .child(div().child(format!(
+                        "Value: {:?}",
+                        window.focused_input(cx).map(|input| input.read(cx).text())
+                    ))),
+            )
             .child(
                 h_flex()
                     .items_center()

crates/ui/src/input/element.rs

@@ -5,7 +5,7 @@ use gpui::{
 };
 use smallvec::SmallVec;
 
-use crate::ActiveTheme as _;
+use crate::{ActiveTheme as _, ContextModal as _, Root};
 
 use super::TextInput;
 
@@ -502,6 +502,31 @@ impl Element for TextElement {
             cx,
         );
 
+        // Set Root focused_input when self is focused
+        if focused {
+            let input_view = self.input.clone();
+            if Root::read(window, cx).focused_input.as_ref() != Some(&input_view) {
+                Root::update(window, cx, |root, _, cx| {
+                    root.focused_input = Some(input_view);
+                    cx.notify();
+                });
+            }
+        }
+
+        // And reset focused_input when next_frame start
+
+        window.on_next_frame({
+            let input_view = self.input.clone();
+            move |window, cx| {
+                if !focused && Root::read(window, cx).focused_input.as_ref() == Some(&input_view) {
+                    Root::update(window, cx, |root, _, cx| {
+                        root.focused_input = None;
+                        cx.notify();
+                    });
+                }
+            }
+        });
+
         // Paint selections
         if let Some(path) = prepaint.selection_path.take() {
             window.paint_path(path, cx.theme().selection);

crates/ui/src/input/input.rs

@@ -1478,12 +1478,7 @@ impl TextInput {
         self.focus_handle.is_focused(window) && self.blink_cursor.read(cx).visible()
     }
 
-    fn on_focus(&mut self, window: &mut Window, cx: &mut Context<Self>) {
-        let input_entity = cx.entity();
-        Root::update(window, cx, |root, _, _| {
-            root.focused_input = Some(input_entity)
-        });
-
+    fn on_focus(&mut self, _: &mut Window, cx: &mut Context<Self>) {
         self.blink_cursor.update(cx, |cursor, cx| {
             cursor.start(cx);
         });
@@ -1491,10 +1486,6 @@ impl TextInput {
     }
 
     fn on_blur(&mut self, window: &mut Window, cx: &mut Context<Self>) {
-        Root::update(window, cx, |root, _, _| {
-            root.focused_input = None;
-        });
-
         self.unselect(window, cx);
         self.blink_cursor.update(cx, |cursor, cx| {
             cursor.stop(cx);