93 lines
4.8 KiB
TypeScript
93 lines
4.8 KiB
TypeScript
import { describe, expect, test } from "bun:test";
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import { createRef } from "react";
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import { renderToStaticMarkup } from "react-dom/server";
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import { CanvasViewport } from "../src/components/canvas/canvas-viewport";
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import { canvasAppearanceForTheme } from "../src/lib/canvas/canvas-appearance";
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import { applyCanvasLiveViewport, CANVAS_GRAPHICS_VIEWPORT_PREVIEW_EVENT, CANVAS_VIEWPORT_PREVIEW_EVENT } from "../src/lib/canvas/canvas-live-viewport";
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import type { CanvasBackgroundMode } from "../src/lib/canvas-theme";
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import type { ViewportTransform } from "../src/types/canvas";
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const viewports: ViewportTransform[] = [
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{ x: 0, y: 0, k: 1 },
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{ x: 389.5, y: -207.25, k: 0.05 },
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{ x: -17.125, y: 20.875, k: 0.119 },
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{ x: -17.125, y: 20.875, k: 0.12 },
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{ x: 150.2, y: -40.1, k: 0.666 },
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{ x: 150.2, y: -40.1, k: 0.667 },
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{ x: -1800.5, y: 3100.75, k: 2 },
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];
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function renderGrid(mode: CanvasBackgroundMode, viewport: ViewportTransform, theme: "light" | "dark" = "dark") {
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const markup = renderToStaticMarkup(
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<CanvasViewport containerRef={createRef<HTMLDivElement>()} viewport={viewport} onViewportChange={() => {}} backgroundMode={mode} appearance={canvasAppearanceForTheme(theme)}>
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<div data-test-node />
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</CanvasViewport>,
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);
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return markup.match(/<div data-canvas-grid-layer[^>]*>/)?.[0] ?? null;
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}
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describe("canvas screen-space background", () => {
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for (const mode of ["lines", "dots"] as const) {
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test(`${mode} keeps fixed geometry across zoom, pan and committed renders`, () => {
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for (const theme of ["light", "dark"] as const) {
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const initial = renderGrid(mode, viewports[0], theme);
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expect(initial).not.toBeNull();
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expect(initial).toContain("background-size:48px 48px");
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expect(initial).toContain("inset:0");
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expect(initial).not.toContain("transform:");
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expect(initial).not.toContain("var(--canvas-");
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if (mode === "dots") expect(initial).toContain("0.8px, transparent 1px");
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for (const viewport of viewports) expect(renderGrid(mode, viewport, theme)).toBe(initial);
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}
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});
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}
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test("blank mode renders no grid at any viewport", () => {
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for (const viewport of viewports) expect(renderGrid("blank", viewport)).toBeNull();
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});
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test("live updates transform the world and emit events without mutating the background", () => {
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const properties = new Map<string, string>([["--canvas-committed-scale", "0.5"]]);
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const gridWrites: string[] = [];
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const world = { style: { transform: "", transformOrigin: "", willChange: "" } };
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const grid = { style: { setProperty: (name: string) => gridWrites.push(name) } };
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const container = Object.assign(new EventTarget(), {
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style: {
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getPropertyValue: (name: string) => properties.get(name) ?? "",
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setProperty: (name: string, value: string) => properties.set(name, value),
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},
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dataset: { canvasViewportInteracting: "true" },
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querySelector: (selector: string) => (selector === "[data-canvas-world-layer]" ? world : grid),
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});
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const graphics: ViewportTransform[] = [];
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const previews: ViewportTransform[] = [];
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let scrolls = 0;
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container.addEventListener(CANVAS_GRAPHICS_VIEWPORT_PREVIEW_EVENT, (event) => graphics.push((event as CustomEvent<ViewportTransform>).detail));
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container.addEventListener(CANVAS_VIEWPORT_PREVIEW_EVENT, (event) => previews.push((event as CustomEvent<ViewportTransform>).detail));
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container.addEventListener("scroll", () => scrolls++);
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for (const viewport of viewports) {
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applyCanvasLiveViewport(container as unknown as HTMLDivElement, viewport, false);
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expect(world.style.transform).toBe(`translate3d(${viewport.x}px, ${viewport.y}px, 0) scale(${viewport.k / 0.5})`);
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// 交互期不改继承变量，避免整棵节点子树在每一帧强制重算样式。
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expect(properties.has("--canvas-live-scale")).toBe(false);
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expect(properties.has("--canvas-live-inverse-scale")).toBe(false);
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expect(gridWrites).toEqual([]);
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}
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expect(graphics).toEqual(viewports);
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expect(previews).toEqual([]);
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expect(scrolls).toBe(0);
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expect(world.style.willChange).toBe("transform");
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container.dataset.canvasViewportInteracting = "false";
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applyCanvasLiveViewport(container as unknown as HTMLDivElement, viewports[0]);
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expect(properties.get("--canvas-live-scale")).toBe("1");
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expect(properties.get("--canvas-live-inverse-scale")).toBe("1");
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expect(world.style.willChange).toBe("");
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expect(previews).toEqual([viewports[0]]);
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expect(scrolls).toBe(1);
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expect(gridWrites).toEqual([]);
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});
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});
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