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/forms/text/actions.rs

@@ -318,7 +318,7 @@ impl TextInput {
         if self.disabled {
             return;
         }
-        window.focus(&self.focus);
+        window.focus(&self.focus, cx);
         let at = self.offset_for_point(event.position);
         match event.click_count {
             2 => {

src/forms/text/element.rs

@@ -1,3 +1,5 @@
+use std::rc::Rc;
+
 use gpui::{
     App, AvailableSpace, Bounds, ContentMask, DispatchPhase, Element, ElementId,
     ElementInputHandler, Entity, FontStyle, GlobalElementId, Hsla, InspectorElementId, IntoElement,
@@ -27,7 +29,7 @@ impl IntoElement for TextElement {
 }
 
 pub(crate) struct Prepaint {
-    lines: Vec<(usize, WrappedLine)>,
+    lines: Rc<[(usize, WrappedLine)]>,
     selections: Vec<Bounds<Pixels>>,
     caret: Option<Bounds<Pixels>>,
     selection_color: Hsla,
@@ -219,7 +221,8 @@ impl Element for TextElement {
             .text_system()
             .shape_text(text.clone().into(), font_size, &runs, wrap, None)
             .expect("text input shaping failed");
-        let lines: Vec<(usize, WrappedLine)> = line_starts(&text).into_iter().zip(shaped).collect();
+        let lines: Rc<[(usize, WrappedLine)]> =
+            line_starts(&text).into_iter().zip(shaped).collect();
         let focused = input.focus().is_focused(window);
         let caret_on = input.caret_on();
         self.input.update(cx, |input, _| {
@@ -285,7 +288,7 @@ impl Element for TextElement {
         window.with_content_mask(Some(ContentMask { bounds }), |window| {
             let mut origins = Vec::with_capacity(prepaint.lines.len());
             let mut top = Pixels::ZERO;
-            for (_, line) in &prepaint.lines {
+            for (_, line) in prepaint.lines.iter() {
                 origins.push(bounds.origin - scroll + point(Pixels::ZERO, top));
                 top += line.size(line_height).height;
             }

src/forms/text/geometry.rs

@@ -59,7 +59,7 @@ impl TextInput {
             return Some(Point::default());
         }
         let mut top = Pixels::ZERO;
-        for (start, line) in &layout.lines {
+        for (start, line) in layout.lines.iter() {
             if display <= start + line.len() {
                 let at = line.position_for_index(display - start, layout.line_height)?;
                 return Some(gpui::point(at.x, at.y + top));
@@ -82,7 +82,7 @@ impl TextInput {
             return 0;
         }
         let mut top = Pixels::ZERO;
-        for (start, line) in &layout.lines {
+        for (start, line) in layout.lines.iter() {
             let height = line.size(layout.line_height).height;
             if local.y < top + height {
                 let inside = gpui::point(local.x.max(Pixels::ZERO), local.y - top);

src/forms/text/mod.rs

@@ -36,7 +36,7 @@ pub(crate) type Fit = Rc<dyn Fn(&str, Range<usize>, &str) -> (String, usize)>;
 
 /// The last shaped text: one entry per hard line, with its display offset.
 pub(crate) struct Layout {
-    pub lines: Vec<(usize, WrappedLine)>,
+    pub lines: Rc<[(usize, WrappedLine)]>,
     pub bounds: Bounds<Pixels>,
     pub line_height: Pixels,
     /// The lines show the placeholder, not content.