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Fix embedding scene to PNG on Safari (#2235)

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David Luzar 2020-10-13 16:55:08 +02:00 • committed by GitHub
parent 5950fa9a40
commit f40a2230ec
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4 changed files with 51 additions and 26 deletions
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18
src/data/blob.ts
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@ -6,24 +6,14 @@ import { LibraryData, ImportedDataState } from "./types";
import { calculateScrollCenter } from "../scene";
import { MIME_TYPES } from "../constants";
import { base64ToString } from "../base64";
export const parseFileContents = async (blob: Blob | File) => {
let contents: string;
if (blob.type === "image/png") {
const { default: decodePng } = await import("png-chunks-extract");
const { default: tEXt } = await import("png-chunk-text");
const chunks = decodePng(new Uint8Array(await blob.arrayBuffer()));
const metadataChunk = chunks.find((chunk) => chunk.name === "tEXt");
if (metadataChunk) {
const metadata = tEXt.decode(metadataChunk.data);
if (metadata.keyword === MIME_TYPES.excalidraw) {
return metadata.text;
}
throw new Error(t("alerts.imageDoesNotContainScene"));
} else {
throw new Error(t("alerts.imageDoesNotContainScene"));
const metadata = await (await import("./png")).getTEXtChunk(blob);
if (metadata?.keyword === MIME_TYPES.excalidraw) {
return metadata.text;
}
throw new Error(t("alerts.imageDoesNotContainScene"));
} else {
if ("text" in Blob) {
contents = await blob.text();