fix(app): restore native composer auto-growth (#3681)

Native multiline inputs were always scrollable, which kept iOS content-size measurement pinned to one line. Keep native sizing intrinsic below the cap and enable internal scrolling only after the composer reaches it.
2026-08-22 11:36:22 +02:00
parent 4c6b79dc44
commit b4e0ff7685
3 changed files with 70 additions and 16 deletions
@@ -0,0 +1,38 @@
+import { describe, expect, it } from "vitest";
+import { resolveComposerInputHeightStyle, shouldScrollComposerInput } from "./height-style";
+
+describe("composer input height style", () => {
+  it("applies the measured height alongside its bounds", () => {
+    expect(
+      resolveComposerInputHeightStyle({
+        inputHeight: 96,
+        minInputHeight: 30,
+        maxInputHeight: 240,
+        applyMeasuredHeight: true,
+      }),
+    ).toEqual({
+      height: 96,
+      minHeight: 30,
+      maxHeight: 240,
+    });
+  });
+
+  it("lets a native multiline input expose its intrinsic content height", () => {
+    expect(
+      resolveComposerInputHeightStyle({
+        inputHeight: 96,
+        minInputHeight: 30,
+        maxInputHeight: 240,
+        applyMeasuredHeight: false,
+      }),
+    ).toEqual({
+      minHeight: 30,
+      maxHeight: 240,
+    });
+  });
+
+  it("keeps native measurement unconstrained until the composer reaches its cap", () => {
+    expect(shouldScrollComposerInput({ inputHeight: 30, maxInputHeight: 240 })).toBe(false);
+    expect(shouldScrollComposerInput({ inputHeight: 240, maxInputHeight: 240 })).toBe(true);
+  });
+});