feat(input): route temporary pan through tool state

input/viewport-pan.test.ts

@@ -0,0 +1,48 @@
+import { describe, expect, test } from "bun:test";
+import { createViewportPanInputController } from "./viewport-pan";
+
+const ignoredState = undefined as never;
+
+describe("viewport pan input controller", () => {
+  test("space enters and exits temporary pan through commands", () => {
+    const dispatched: unknown[] = [];
+    const controller = createViewportPanInputController({
+      globalKeyConsumer: () => false,
+      globalPointerConsumer: () => false,
+      getCurrentZoom: () => 1,
+      isPanMode: () => false,
+      dispatch: (commandId, payload) => {
+        dispatched.push({ commandId, payload });
+        return ignoredState;
+      },
+    });
+
+    expect(controller.keyDown(keyEvent("Space"))).toBe(true);
+    expect(controller.keyUp(keyEvent("Space"))).toBe(true);
+    expect(dispatched).toEqual([
+      { commandId: "tool.enterTemporaryPan", payload: undefined },
+      { commandId: "tool.exitTemporaryPan", payload: undefined },
+    ]);
+  });
+
+  test("global key consumer prevents temporary pan command", () => {
+    let dispatched = false;
+    const controller = createViewportPanInputController({
+      globalKeyConsumer: () => true,
+      globalPointerConsumer: () => false,
+      getCurrentZoom: () => 1,
+      isPanMode: () => false,
+      dispatch: () => {
+        dispatched = true;
+        return ignoredState;
+      },
+    });
+
+    expect(controller.keyDown(keyEvent("Space"))).toBe(true);
+    expect(dispatched).toBe(false);
+  });
+});
+
+function keyEvent(code: string) {
+  return { key: code === "Space" ? " " : code, code, altKey: false, ctrlKey: false, metaKey: false, shiftKey: false };
+}