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import React from "react";
import { render, waitFor } from "./test-utils";
import { Excalidraw } from "../index";
import { API } from "./helpers/api";
import { encodePngMetadata } from "../data/image";
import { serializeAsJSON } from "../data/json";
import {
decodeSvgBase64Payload,
encodeSvgBase64Payload,
exportToSvg,
} from "../scene/export";
import type { FileId } from "../element/types";
import { getDataURL } from "../data/blob";
import { getDefaultAppState } from "../appState";
import { SVG_NS } from "../constants";
const { h } = window;
const testElements = [
{
...API.createElement({
type: "text",
id: "A",
text: "😀",
}),
// can't get jsdom text measurement to work so this is a temp hack
// to ensure the element isn't stripped as invisible
width: 16,
height: 16,
},
];
// tiny polyfill for TextDecoder.decode on which we depend
Object.defineProperty(window, "TextDecoder", {
value: class TextDecoder {
decode(ab: ArrayBuffer) {
return new Uint8Array(ab).reduce(
(acc, c) => acc + String.fromCharCode(c),
"",
);
}
},
});
describe("export", () => {
beforeEach(async () => {
await render(<Excalidraw />);
});
it("export embedded png and reimport", async () => {
const pngBlob = await API.loadFile("./fixtures/smiley.png");
const pngBlobEmbedded = await encodePngMetadata({
blob: pngBlob,
metadata: serializeAsJSON(testElements, h.state, {}, "local"),
});
await API.drop(pngBlobEmbedded);
await waitFor(() => {
expect(h.elements).toEqual([
expect.objectContaining({ type: "text", text: "😀" }),
]);
});
});
it("test encoding/decoding scene for SVG export", async () => {
const metadataElement = document.createElementNS(SVG_NS, "metadata");
encodeSvgBase64Payload({
metadataElement,
payload: serializeAsJSON(testElements, h.state, {}, "local"),
});
const decoded = JSON.parse(
decodeSvgBase64Payload({ svg: metadataElement.innerHTML }),
);
expect(decoded.elements).toEqual([
expect.objectContaining({ type: "text", text: "😀" }),
]);
});
it("export svg-embedded scene", async () => {
const svg = await exportToSvg(
testElements,
{ ...getDefaultAppState(), exportEmbedScene: true },
{},
);
const svgText = svg.outerHTML;
expect(svgText).toMatchSnapshot(`svg-embdedded scene export output`);
});
it("import embedded png (legacy v1)", async () => {
await API.drop(await API.loadFile("./fixtures/test_embedded_v1.png"));
await waitFor(() => {
expect(h.elements).toEqual([
expect.objectContaining({ type: "text", text: "test" }),
]);
});
});
it("import embedded png (v2)", async () => {
await API.drop(await API.loadFile("./fixtures/smiley_embedded_v2.png"));
await waitFor(() => {
expect(h.elements).toEqual([
expect.objectContaining({ type: "text", text: "😀" }),
]);
});
});
it("import embedded svg (legacy v1)", async () => {
await API.drop(await API.loadFile("./fixtures/test_embedded_v1.svg"));
await waitFor(() => {
expect(h.elements).toEqual([
expect.objectContaining({ type: "text", text: "test" }),
]);
});
});
it("import embedded svg (v2)", async () => {
await API.drop(await API.loadFile("./fixtures/smiley_embedded_v2.svg"));
await waitFor(() => {
expect(h.elements).toEqual([
expect.objectContaining({ type: "text", text: "😀" }),
]);
});
});
it("exporting svg containing transformed images", async () => {
const normalizeAngle = (angle: number) => (angle / 180) * Math.PI;
const elements = [
API.createElement({
type: "image",
fileId: "file_A",
x: 0,
y: 0,
scale: [1, 1],
width: 100,
height: 100,
angle: normalizeAngle(315),
}),
API.createElement({
type: "image",
fileId: "file_A",
x: 100,
y: 0,
scale: [-1, 1],
width: 50,
height: 50,
angle: normalizeAngle(45),
}),
API.createElement({
type: "image",
fileId: "file_A",
x: 0,
y: 100,
scale: [1, -1],
width: 100,
height: 100,
angle: normalizeAngle(45),
}),
API.createElement({
type: "image",
fileId: "file_A",
x: 100,
y: 100,
scale: [-1, -1],
width: 50,
height: 50,
angle: normalizeAngle(315),
}),
];
const appState = { ...getDefaultAppState(), exportBackground: false };
const files = {
file_A: {
id: "file_A" as FileId,
dataURL: await getDataURL(await API.loadFile("./fixtures/deer.png")),
mimeType: "image/png",
created: Date.now(),
lastRetrieved: Date.now(),
},
} as const;
const svg = await exportToSvg(elements, appState, files);
const svgText = svg.outerHTML;
// expect 1 <image> element (deduped)
expect(svgText.match(/<image/g)?.length).toBe(1);
// expect 4 <use> elements (one for each excalidraw image element)
expect(svgText.match(/<use/g)?.length).toBe(4);
// in case of regressions, save the SVG to a file and visually compare to:
// src/tests/fixtures/svg-image-exporting-reference.svg
expect(svgText).toMatchSnapshot(`svg export output`);
});
});
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