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feat: store library to IndexedDB & support storage adapters (#7655)

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David Luzar 2024-03-08 22:29:19 +01:00 • committed by GitHub
parent 480572f893
commit 2382fad4f6
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14 changed files with 718 additions and 95 deletions
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27
packages/excalidraw/element/index.ts
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@ -60,9 +60,36 @@ export {
} from "./sizeHelpers";
export { showSelectedShapeActions } from "./showSelectedShapeActions";
/**
* @deprecated unsafe, use hashElementsVersion instead
*/
export const getSceneVersion = (elements: readonly ExcalidrawElement[]) =>
elements.reduce((acc, el) => acc + el.version, 0);
/**
* Hashes elements' versionNonce (using djb2 algo). Order of elements matters.
*/
export const hashElementsVersion = (
elements: readonly ExcalidrawElement[],
): number => {
let hash = 5381;
for (let i = 0; i < elements.length; i++) {
hash = (hash << 5) + hash + elements[i].versionNonce;
}
return hash >>> 0; // Ensure unsigned 32-bit integer
};
// string hash function (using djb2). Not cryptographically secure, use only
// for versioning and such.
export const hashString = (s: string): number => {
let hash: number = 5381;
for (let i = 0; i < s.length; i++) {
const char: number = s.charCodeAt(i);
hash = (hash << 5) + hash + char;
}
return hash >>> 0; // Ensure unsigned 32-bit integer
};
export const getVisibleElements = (elements: readonly ExcalidrawElement[]) =>
elements.filter(
(el) => !el.isDeleted && !isInvisiblySmallElement(el),