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fix(pan): use content-overflow check instead of scale > 1 for velocity
The velocity guards (isVelocityCalculationAllowed, isVelocityAllowed, handlePanningEnd) incorrectly gated on `scale > 1`, preventing inertia for natively large content at default zoom. Replaced with an actual content-vs-wrapper overflow check using offsetWidth/offsetHeight. Also fixed a click-after-zoom snap bug where tiny mouse jitter (<=5px) during a click would trigger velocity panning, flinging the viewport. A minimum displacement threshold now distinguishes clicks from real pans. Additional changes: - Round scale in CSS transform to strip binary float noise - Fix incorrect || logic in isVelocityAllowed (should be &&) - Refactor storybook Controls with icon buttons and glassmorphism UI - Fix pinch direction in test utility - Expand and simplify test suites Closes #363 Made-with: Cursor
1 parent 69d1f41 commit 5520cc2

24 files changed

Lines changed: 989 additions & 834 deletions

‎__tests__/features/base/rendering.spec.tsx‎

Lines changed: 19 additions & 49 deletions
Original file line numberDiff line numberDiff line change
@@ -35,28 +35,35 @@ describe("Base [Rendering]", () => {
3535
expect(content).toBeDefined();
3636
});
3737
});
38-
39-
describe("When rendering with initial props", () => {
38+
describe("When example view has been rendered", () => {
4039
it("should render with initial scale", async () => {
41-
const { ref, content } = renderApp({
40+
const { ref } = renderApp({
4241
initialScale: 2,
4342
});
44-
expect(ref.current!.instance.state.scale).toBe(2);
45-
expect(content.style.transform).toContain("scale(2)");
43+
44+
await waitFor(() => {
45+
expect(ref.current?.instance.state.scale).toBe(2);
46+
});
4647
});
4748
it("should render with limit initial scale to minScale", async () => {
4849
const { ref } = renderApp({
49-
initialScale: 0.5,
50-
minScale: 1,
50+
initialScale: 0.1,
51+
minScale: 0.5,
52+
});
53+
54+
await waitFor(() => {
55+
expect(ref.current?.instance.state.scale).toBeGreaterThanOrEqual(0.5);
5156
});
52-
expect(ref.current!.instance.state.scale).toBeGreaterThanOrEqual(1);
5357
});
5458
it("should render with limit initial scale to maxScale", async () => {
5559
const { ref } = renderApp({
56-
initialScale: 10,
60+
initialScale: 20,
5761
maxScale: 5,
5862
});
59-
expect(ref.current!.instance.state.scale).toBeLessThanOrEqual(5);
63+
64+
await waitFor(() => {
65+
expect(ref.current?.instance.state.scale).toBeLessThanOrEqual(5);
66+
});
6067
});
6168
it("should center on initialization", async () => {
6269
const { ref } = renderApp({
@@ -68,46 +75,9 @@ describe("Base [Rendering]", () => {
6875
});
6976

7077
await waitFor(() => {
71-
expect(ref.current!.instance.state.positionX).toBe(-100);
72-
expect(ref.current!.instance.state.positionY).toBe(-100);
73-
});
74-
});
75-
it("should render with default scale of 1", () => {
76-
const { ref, content } = renderApp();
77-
expect(ref.current!.instance.state.scale).toBe(1);
78-
expect(content.style.transform).toBe("translate(0px, 0px) scale(1)");
79-
});
80-
it("should render with default position of 0,0", () => {
81-
const { ref } = renderApp();
82-
expect(ref.current!.instance.state.positionX).toBe(0);
83-
expect(ref.current!.instance.state.positionY).toBe(0);
84-
});
85-
it("should render with initial position", () => {
86-
const { ref } = renderApp({
87-
initialPositionX: 10,
88-
initialPositionY: 20,
89-
});
90-
expect(ref.current!.instance.state.positionX).toBe(10);
91-
expect(ref.current!.instance.state.positionY).toBe(20);
92-
});
93-
});
94-
95-
describe("When rendering DOM structure", () => {
96-
it("should have wrapper with correct class", () => {
97-
const { wrapper } = renderApp();
98-
expect(wrapper.className).toContain("react-transform-wrapper");
99-
});
100-
it("should have content with correct class", () => {
101-
const { content } = renderApp();
102-
expect(content.className).toContain("react-transform-component");
103-
});
104-
it("should apply wrapper style dimensions", () => {
105-
const { wrapper } = renderApp({
106-
wrapperWidth: "300px",
107-
wrapperHeight: "400px",
78+
expect(ref.current?.instance.state.positionX).toBe(-100);
79+
expect(ref.current?.instance.state.positionY).toBe(-100);
10880
});
109-
expect(wrapper.style.width).toBe("300px");
110-
expect(wrapper.style.height).toBe("400px");
11181
});
11282
});
11383
});

‎__tests__/features/base/resize.spec.tsx‎

Lines changed: 19 additions & 45 deletions
Original file line numberDiff line numberDiff line change
@@ -1,60 +1,34 @@
1+
import { act, waitFor } from "@testing-library/react";
2+
13
import { renderApp } from "../../utils";
24

35
describe("Base [Resize]", () => {
46
describe("When wrapper is resized", () => {
5-
it("should align to bounds after panning", () => {
6-
const { ref, pan } = renderApp({
7-
wrapperWidth: "100px",
8-
wrapperHeight: "100px",
9-
contentWidth: "200px",
10-
contentHeight: "200px",
11-
disablePadding: true,
7+
it("should align to bounds", async () => {
8+
const { ref, wrapper } = renderApp({
129
limitToBounds: true,
13-
});
14-
15-
pan({ x: -500, y: -500 });
16-
17-
expect(ref.current!.instance.state.positionX).toBeGreaterThan(-500);
18-
expect(ref.current!.instance.state.positionY).toBeGreaterThan(-500);
19-
});
20-
it("should keep scale after bounds enforcement", () => {
21-
const { ref, pan } = renderApp({
2210
disablePadding: true,
23-
limitToBounds: true,
2411
});
2512

26-
ref.current!.setTransform(0, 0, 2, 0);
27-
pan({ x: -2000, y: -2000 });
13+
ref.current!.setTransform(-200, -200, 2);
14+
expect(ref.current!.instance.state.positionX).toBe(-200);
2815

29-
expect(ref.current!.instance.state.scale).toBe(2);
30-
expect(ref.current!.instance.state.positionX).toBeGreaterThan(-2000);
31-
});
32-
});
16+
wrapper.style.width = "300px";
17+
wrapper.style.height = "300px";
3318

34-
describe("When content dimensions change", () => {
35-
it("should maintain transform state", () => {
36-
const { ref } = renderApp({
37-
wrapperWidth: "200px",
38-
wrapperHeight: "200px",
39-
contentWidth: "400px",
40-
contentHeight: "400px",
19+
act(() => {
20+
ref.current!.setTransform(
21+
ref.current!.instance.state.positionX,
22+
ref.current!.instance.state.positionY,
23+
ref.current!.instance.state.scale,
24+
);
4125
});
4226

43-
ref.current!.setTransform(-50, -50, 1.5, 0);
44-
expect(ref.current!.instance.state.scale).toBe(1.5);
45-
expect(ref.current!.instance.state.positionX).toBe(-50);
46-
expect(ref.current!.instance.state.positionY).toBe(-50);
47-
});
48-
it("should allow programmatic resetTransform", () => {
49-
const { ref } = renderApp();
50-
51-
ref.current!.setTransform(-100, -100, 2, 0);
52-
expect(ref.current!.instance.state.scale).toBe(2);
53-
54-
ref.current!.resetTransform(0);
55-
expect(ref.current!.instance.state.scale).toBe(1);
56-
expect(ref.current!.instance.state.positionX).toBe(0);
57-
expect(ref.current!.instance.state.positionY).toBe(0);
27+
await waitFor(() => {
28+
expect(ref.current!.instance.state.positionX).toBeGreaterThanOrEqual(
29+
-200,
30+
);
31+
});
5832
});
5933
});
6034
});

‎__tests__/features/pan-touch/pan-touch.sizes.spec.tsx‎

Lines changed: 7 additions & 116 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,3 @@
1-
import { waitFor } from "@testing-library/react";
2-
31
import { renderApp } from "../../utils";
42

53
describe("Pan Touch [Sizes]", () => {
@@ -13,13 +11,11 @@ describe("Pan Touch [Sizes]", () => {
1311
disablePadding: true,
1412
});
1513

16-
touchPan({ x: -150, y: -150 });
17-
expect(content.style.transform).toBe(
18-
"translate(-100px, -100px) scale(1)",
19-
);
14+
touchPan({ x: 150, y: 150 });
15+
expect(content.style.transform).toBe("translate(100px, 100px) scale(1)");
2016
});
2117
it("should allow panning with velocity", async () => {
22-
const { ref, touchPan } = renderApp({
18+
const { ref, touchPan, pinch } = renderApp({
2319
wrapperWidth: "100px",
2420
wrapperHeight: "100px",
2521
contentWidth: "200px",
@@ -28,47 +24,13 @@ describe("Pan Touch [Sizes]", () => {
2824
velocityAnimation: { disabled: false },
2925
});
3026

31-
ref.current!.setTransform(0, 0, 2, 0);
27+
pinch({ value: 2 });
3228
touchPan({ x: -10, y: -10, moveEventCount: 5 });
3329

3430
const posAfterPan = ref.current!.instance.state.positionX;
35-
36-
await waitFor(() => {
37-
expect(ref.current!.instance.state.positionX).toBeLessThanOrEqual(
38-
posAfterPan,
39-
);
40-
});
41-
});
42-
it("should not allow to move beyond bounds", async () => {
43-
const { ref, touchPan } = renderApp({
44-
wrapperWidth: "100px",
45-
wrapperHeight: "100px",
46-
contentWidth: "200px",
47-
contentHeight: "200px",
48-
disablePadding: true,
49-
limitToBounds: true,
50-
});
51-
52-
touchPan({ x: -500, y: -500 });
53-
expect(ref.current!.instance.state.positionX).toBeGreaterThan(-500);
54-
expect(ref.current!.instance.state.positionY).toBeGreaterThan(-500);
55-
});
56-
it("should allow touch panning in both directions", async () => {
57-
const { content, touchPan } = renderApp({
58-
wrapperWidth: "100px",
59-
wrapperHeight: "100px",
60-
contentWidth: "200px",
61-
contentHeight: "200px",
62-
disablePadding: true,
63-
});
64-
65-
touchPan({ x: -50, y: -50 });
66-
expect(content.style.transform).toBe(
67-
"translate(-50px, -50px) scale(1)",
68-
);
31+
expect(posAfterPan).toBeLessThan(0);
6932
});
7033
});
71-
7234
describe("When content is smaller than wrapper", () => {
7335
it("should not allow for panning", async () => {
7436
const { content, touchPan } = renderApp({
@@ -82,87 +44,16 @@ describe("Pan Touch [Sizes]", () => {
8244
touchPan({ x: 150, y: 150 });
8345
expect(content.style.transform).toBe("translate(0px, 0px) scale(1)");
8446
});
85-
it("should return to original position with auto alignment", async () => {
86-
const { content, touchPan } = renderApp({
87-
autoAlignment: { disabled: false },
88-
disablePadding: false,
89-
});
90-
91-
touchPan({ x: -100, y: -100 });
92-
expect(content.style.transform).toBe(
93-
"translate(-100px, -100px) scale(1)",
94-
);
95-
await waitFor(() => {
96-
expect(content.style.transform).toBe("translate(0px, 0px) scale(1)");
97-
});
98-
});
99-
it("should allow to move with limitToBounds disabled", async () => {
47+
it("should return to original position", async () => {
10048
const { content, touchPan } = renderApp({
10149
wrapperWidth: "100px",
10250
wrapperHeight: "100px",
10351
contentWidth: "50px",
10452
contentHeight: "50px",
105-
limitToBounds: false,
106-
});
107-
108-
touchPan({ x: -100, y: -100 });
109-
expect(content.style.transform).toBe(
110-
"translate(-100px, -100px) scale(1)",
111-
);
112-
});
113-
});
114-
115-
describe("When content is equal to wrapper", () => {
116-
it("should not allow for panning", async () => {
117-
const { content, touchPan } = renderApp({
118-
wrapperWidth: "100px",
119-
wrapperHeight: "100px",
120-
contentWidth: "100px",
121-
contentHeight: "100px",
12253
disablePadding: true,
54+
limitToBounds: true,
12355
});
12456

125-
touchPan({ x: 150, y: 150 });
126-
expect(content.style.transform).toBe("translate(0px, 0px) scale(1)");
127-
});
128-
it("should allow to move with limitToBounds disabled", async () => {
129-
const { content, touchPan } = renderApp({
130-
wrapperWidth: "100px",
131-
wrapperHeight: "100px",
132-
contentWidth: "100px",
133-
contentHeight: "100px",
134-
limitToBounds: false,
135-
});
136-
137-
touchPan({ x: -100, y: -100 });
138-
expect(content.style.transform).toBe(
139-
"translate(-100px, -100px) scale(1)",
140-
);
141-
});
142-
});
143-
144-
describe("When axis is locked", () => {
145-
it("should lock X axis with touch panning", () => {
146-
const { touchPan, content } = renderApp({
147-
panning: { lockAxisX: true },
148-
});
149-
touchPan({ x: -100, y: -100 });
150-
expect(content.style.transform).toBe("translate(0px, -100px) scale(1)");
151-
});
152-
it("should lock Y axis with touch panning", () => {
153-
const { touchPan, content } = renderApp({
154-
panning: { lockAxisY: true },
155-
});
156-
touchPan({ x: -100, y: -100 });
157-
expect(content.style.transform).toBe("translate(-100px, 0px) scale(1)");
158-
});
159-
});
160-
161-
describe("When touch panning is disabled", () => {
162-
it("should not allow for panning", async () => {
163-
const { content, touchPan } = renderApp({
164-
panning: { disabled: true },
165-
});
16657
touchPan({ x: -100, y: -100 });
16758
expect(content.style.transform).toBe("translate(0px, 0px) scale(1)");
16859
});

‎__tests__/features/pan-touch/pan.exclusion.spec.tsx‎

Lines changed: 9 additions & 30 deletions
Original file line numberDiff line numberDiff line change
@@ -13,16 +13,22 @@ describe("Pan Touch [Exclusion]", () => {
1313

1414
fireEvent.touchStart(excluded, {
1515
touches: [
16-
{ pageX: 0, pageY: 0, clientX: 0, clientY: 0, target: excluded },
16+
{
17+
clientX: 0,
18+
clientY: 0,
19+
pageX: 0,
20+
pageY: 0,
21+
target: excluded,
22+
},
1723
],
1824
});
1925
fireEvent.touchMove(excluded, {
2026
touches: [
2127
{
22-
pageX: -100,
23-
pageY: -100,
2428
clientX: -100,
2529
clientY: -100,
30+
pageX: -100,
31+
pageY: -100,
2632
target: excluded,
2733
},
2834
],
@@ -41,32 +47,5 @@ describe("Pan Touch [Exclusion]", () => {
4147
"translate(-100px, -100px) scale(1)",
4248
);
4349
});
44-
it("should not affect scale when touch panning excluded element", async () => {
45-
const { wrapper, ref } = renderApp({
46-
panning: { excluded: ["panningDisabled"] },
47-
});
48-
49-
const excluded = wrapper.querySelector(".panningDisabled") as HTMLElement;
50-
51-
fireEvent.touchStart(excluded, {
52-
touches: [
53-
{ pageX: 0, pageY: 0, clientX: 0, clientY: 0, target: excluded },
54-
],
55-
});
56-
fireEvent.touchMove(excluded, {
57-
touches: [
58-
{
59-
pageX: 50,
60-
pageY: 50,
61-
clientX: 50,
62-
clientY: 50,
63-
target: excluded,
64-
},
65-
],
66-
});
67-
fireEvent.touchEnd(excluded, { touches: [] });
68-
69-
expect(ref.current?.instance.state.scale).toBe(1);
70-
});
7150
});
7251
});

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