mirror of
https://github.com/andre482/O-tie.git
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8a376a87a8
- Single-finger touch panning now works even when starting on a node; a tap still selects. - Add keyboard node selection (Tab/Enter/Space/Escape) and validated settings input. - Guard against overwriting malformed .bowtie files; show a notice and keep original data. - Add Vitest tests (model/layout/panZoom) and a GitHub Actions CI workflow. - Split bowtieView into history/panZoom/stackRows/externalSync modules; refresh README, examples, and contributor docs. Co-authored-by: Cursor <cursoragent@cursor.com>
58 lines
1.8 KiB
TypeScript
58 lines
1.8 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import {
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clampZoom,
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computeFit,
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computeZoomAt,
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MAX_ZOOM,
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MIN_ZOOM,
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wheelFactorFromDelta,
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} from "../src/panZoom";
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describe("clampZoom", () => {
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it("clamps to the configured range", () => {
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expect(clampZoom(0.01)).toBe(MIN_ZOOM);
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expect(clampZoom(99)).toBe(MAX_ZOOM);
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expect(clampZoom(1)).toBe(1);
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});
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});
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describe("wheelFactorFromDelta", () => {
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it("zooms in for negative delta and out for positive delta", () => {
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expect(wheelFactorFromDelta(-100, false)).toBeGreaterThan(1);
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expect(wheelFactorFromDelta(100, false)).toBeLessThan(1);
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});
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it("caps the per-notch step", () => {
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expect(wheelFactorFromDelta(-100000, false)).toBeLessThanOrEqual(1.06);
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expect(wheelFactorFromDelta(100000, true)).toBeGreaterThanOrEqual(1 / 1.08);
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});
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});
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describe("computeZoomAt", () => {
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it("keeps the point under the cursor fixed", () => {
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const view = { zoom: 1, panX: 0, panY: 0 };
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const next = computeZoomAt(view, 200, 100, 2)!;
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expect(next.zoom).toBe(2);
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// World point under (200,100) before zoom: (200,100). After zoom it must map back to (200,100).
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const worldX = (200 - next.panX) / next.zoom;
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const worldY = (100 - next.panY) / next.zoom;
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expect(worldX).toBeCloseTo(200, 5);
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expect(worldY).toBeCloseTo(100, 5);
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});
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it("returns null when clamped zoom does not change", () => {
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const view = { zoom: MAX_ZOOM, panX: 0, panY: 0 };
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expect(computeZoomAt(view, 0, 0, 2)).toBeNull();
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});
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});
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describe("computeFit", () => {
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it("centers the diagram within the viewport", () => {
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const fit = computeFit(400, 200, 1000, 600, 40);
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expect(fit.zoom).toBeGreaterThan(0);
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const renderedW = 400 * fit.zoom;
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const renderedH = 200 * fit.zoom;
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expect(fit.panX).toBeCloseTo((1000 - renderedW) / 2, 5);
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expect(fit.panY).toBeCloseTo((600 - renderedH) / 2, 5);
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});
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});
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