snapshot of https://github.com/excalidraw/excalidraw.git (master, 2026-09-16; blobs > 131072B omitted)

packages/element/tests/collision.test.tsx

@@ -0,0 +1,220 @@
+import { arrayToMap, reseed } from "@excalidraw/common";
+import { type GlobalPoint, type LocalPoint, pointFrom } from "@excalidraw/math";
+import { Excalidraw } from "@excalidraw/excalidraw";
+import { API } from "@excalidraw/excalidraw/tests/helpers/api";
+import { UI } from "@excalidraw/excalidraw/tests/helpers/ui";
+import "@excalidraw/utils/test-utils";
+import { render } from "@excalidraw/excalidraw/tests/test-utils";
+
+import * as distance from "../src/distance";
+import { hitElementItself } from "../src/collision";
+
+describe("check rotated elements can be hit:", () => {
+  beforeEach(async () => {
+    localStorage.clear();
+    reseed(7);
+    await render(<Excalidraw handleKeyboardGlobally={true} />);
+  });
+
+  it("arrow", () => {
+    UI.createElement("arrow", {
+      x: 0,
+      y: 0,
+      width: 124,
+      height: 302,
+      angle: 1.8700426423973724,
+      points: [
+        [0, 0],
+        [120, -198],
+        [-4, -302],
+      ] as LocalPoint[],
+    });
+    const hit = hitElementItself({
+      point: pointFrom<GlobalPoint>(88, -68),
+      element: window.h.elements[0],
+      threshold: 10,
+      elementsMap: window.h.scene.getNonDeletedElementsMap(),
+    });
+    expect(hit).toBe(true);
+  });
+});
+
+describe("hitElementItself cache", () => {
+  beforeEach(async () => {
+    // reset cache
+    hitElementItself({
+      point: pointFrom<GlobalPoint>(50, 50),
+      element: API.createElement({
+        type: "rectangle",
+        x: 0,
+        y: 0,
+        width: 100,
+        height: 100,
+        backgroundColor: "#ffffff",
+      }),
+      threshold: Infinity,
+      elementsMap: new Map([]),
+    });
+
+    localStorage.clear();
+    reseed(7);
+    await render(<Excalidraw handleKeyboardGlobally={true} />);
+  });
+
+  it("reuses cached result when threshold increases", () => {
+    const element = API.createElement({
+      type: "rectangle",
+      x: 0,
+      y: 0,
+      width: 100,
+      height: 100,
+      backgroundColor: "#ffffff",
+    });
+    const elementsMap = arrayToMap([element]);
+    const point = pointFrom<GlobalPoint>(100.5, 50);
+
+    const distanceSpy = jest.spyOn(distance, "distanceToElement");
+
+    expect(
+      hitElementItself({
+        point,
+        element,
+        threshold: 1,
+        elementsMap,
+      }),
+    ).toBe(true);
+
+    expect(distanceSpy).toHaveBeenCalledTimes(1);
+
+    expect(
+      hitElementItself({
+        point,
+        element,
+        threshold: 10,
+        elementsMap,
+      }),
+    ).toBe(true);
+
+    expect(distanceSpy).toHaveBeenCalledTimes(1);
+
+    distanceSpy.mockRestore();
+  });
+
+  it("does not reuse cache when threshold decreases", () => {
+    const element = API.createElement({
+      type: "rectangle",
+      x: 0,
+      y: 0,
+      width: 100,
+      height: 100,
+      backgroundColor: "transparent",
+    });
+    const elementsMap = arrayToMap([element]);
+    const point = pointFrom<GlobalPoint>(105, 50);
+
+    const distanceSpy = jest.spyOn(distance, "distanceToElement");
+
+    expect(
+      hitElementItself({
+        point,
+        element,
+        threshold: 10,
+        elementsMap,
+      }),
+    ).toBe(true);
+
+    expect(distanceSpy).toHaveBeenCalledTimes(1);
+
+    expect(
+      hitElementItself({
+        point,
+        element,
+        threshold: 6,
+        elementsMap,
+      }),
+    ).toBe(true);
+
+    expect(distanceSpy).toHaveBeenCalledTimes(2);
+    distanceSpy.mockRestore();
+  });
+
+  it("invalidates cache when element version changes", () => {
+    const element = API.createElement({
+      type: "rectangle",
+      x: 0,
+      y: 0,
+      width: 100,
+      height: 100,
+      backgroundColor: "#ffffff",
+    });
+    const elementsMap = arrayToMap([element]);
+    const point = pointFrom<GlobalPoint>(100.5, 50);
+
+    const distanceSpy = jest.spyOn(distance, "distanceToElement");
+
+    expect(
+      hitElementItself({
+        point,
+        element,
+        threshold: 1,
+        elementsMap,
+      }),
+    ).toBe(true);
+
+    expect(distanceSpy).toHaveBeenCalledTimes(1);
+
+    const movedElement = {
+      ...element,
+      version: element.version + 1,
+      versionNonce: element.versionNonce + 1,
+    };
+
+    expect(
+      hitElementItself({
+        point,
+        element: movedElement,
+        threshold: 1,
+        elementsMap,
+      }),
+    ).toBe(true);
+
+    expect(distanceSpy).toHaveBeenCalledTimes(2);
+    distanceSpy.mockRestore();
+  });
+
+  it("override does not affect caching", () => {
+    const element = API.createElement({
+      type: "rectangle",
+      x: 0,
+      y: 0,
+      width: 100,
+      height: 100,
+      backgroundColor: "transparent",
+    });
+    const elementsMap = arrayToMap([element]);
+    const point = pointFrom<GlobalPoint>(50, 50);
+
+    const distanceSpy = jest.spyOn(distance, "distanceToElement");
+
+    expect(
+      hitElementItself({
+        point,
+        element,
+        threshold: 10,
+        elementsMap,
+      }),
+    ).toBe(false);
+
+    expect(distanceSpy).toHaveBeenCalledTimes(1);
+
+    expect(
+      hitElementItself({
+        point,
+        element,
+        threshold: 10,
+        elementsMap,
+        overrideShouldTestInside: true,
+      }),
+    ).toBe(true);
+  });
+});