Move all crates to a top-level crates folder

Co-Authored-By: Max Brunsfeld <maxbrunsfeld@gmail.com>

crates/gpui/src/elements/align.rs

@@ -0,0 +1,105 @@
+use crate::{
+    geometry::{rect::RectF, vector::Vector2F},
+    json, DebugContext, Element, ElementBox, Event, EventContext, LayoutContext, PaintContext,
+    SizeConstraint,
+};
+use json::ToJson;
+
+use serde_json::json;
+
+pub struct Align {
+    child: ElementBox,
+    alignment: Vector2F,
+}
+
+impl Align {
+    pub fn new(child: ElementBox) -> Self {
+        Self {
+            child,
+            alignment: Vector2F::zero(),
+        }
+    }
+
+    pub fn top(mut self) -> Self {
+        self.alignment.set_y(-1.0);
+        self
+    }
+
+    pub fn left(mut self) -> Self {
+        self.alignment.set_x(-1.0);
+        self
+    }
+
+    pub fn right(mut self) -> Self {
+        self.alignment.set_x(1.0);
+        self
+    }
+}
+
+impl Element for Align {
+    type LayoutState = ();
+    type PaintState = ();
+
+    fn layout(
+        &mut self,
+        mut constraint: SizeConstraint,
+        cx: &mut LayoutContext,
+    ) -> (Vector2F, Self::LayoutState) {
+        let mut size = constraint.max;
+        constraint.min = Vector2F::zero();
+        let child_size = self.child.layout(constraint, cx);
+        if size.x().is_infinite() {
+            size.set_x(child_size.x());
+        }
+        if size.y().is_infinite() {
+            size.set_y(child_size.y());
+        }
+        (size, ())
+    }
+
+    fn paint(
+        &mut self,
+        bounds: RectF,
+        visible_bounds: RectF,
+        _: &mut Self::LayoutState,
+        cx: &mut PaintContext,
+    ) -> Self::PaintState {
+        let my_center = bounds.size() / 2.;
+        let my_target = my_center + my_center * self.alignment;
+
+        let child_center = self.child.size() / 2.;
+        let child_target = child_center + child_center * self.alignment;
+
+        self.child.paint(
+            bounds.origin() - (child_target - my_target),
+            visible_bounds,
+            cx,
+        );
+    }
+
+    fn dispatch_event(
+        &mut self,
+        event: &Event,
+        _: pathfinder_geometry::rect::RectF,
+        _: &mut Self::LayoutState,
+        _: &mut Self::PaintState,
+        cx: &mut EventContext,
+    ) -> bool {
+        self.child.dispatch_event(event, cx)
+    }
+
+    fn debug(
+        &self,
+        bounds: pathfinder_geometry::rect::RectF,
+        _: &Self::LayoutState,
+        _: &Self::PaintState,
+        cx: &DebugContext,
+    ) -> json::Value {
+        json!({
+            "type": "Align",
+            "bounds": bounds.to_json(),
+            "alignment": self.alignment.to_json(),
+            "child": self.child.debug(cx),
+        })
+    }
+}