96 lines
2.9 KiB
TypeScript
96 lines
2.9 KiB
TypeScript
import { toIterable } from "@excalidraw/common";
|
|
|
|
import { isInvisiblySmallElement } from "./sizeHelpers";
|
|
|
|
import type {
|
|
ExcalidrawElement,
|
|
NonDeletedExcalidrawElement,
|
|
NonDeleted,
|
|
ElementsMapOrArray,
|
|
} from "./types";
|
|
|
|
/**
|
|
* @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: ElementsMapOrArray): number => {
|
|
let hash = 5381;
|
|
for (const element of toIterable(elements)) {
|
|
hash = (hash << 5) + hash + element.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),
|
|
) as readonly NonDeletedExcalidrawElement[];
|
|
|
|
export const getNonDeletedElements = <T extends ExcalidrawElement>(
|
|
elements: readonly T[],
|
|
) =>
|
|
elements.filter((element) => !element.isDeleted) as readonly NonDeleted<T>[];
|
|
|
|
export const isNonDeletedElement = <T extends ExcalidrawElement>(
|
|
element: T,
|
|
): element is NonDeleted<T> => !element.isDeleted;
|
|
|
|
export * from "./align";
|
|
export * from "./binding";
|
|
export * from "./bounds";
|
|
export * from "./collision";
|
|
export * from "./comparisons";
|
|
export * from "./containerCache";
|
|
export * from "./cropElement";
|
|
export * from "./delta";
|
|
export * from "./distance";
|
|
export * from "./distribute";
|
|
export * from "./dragElements";
|
|
export * from "./duplicate";
|
|
export * from "./elbowArrow";
|
|
export * from "./elementLink";
|
|
export * from "./embeddable";
|
|
export * from "./flowchart";
|
|
export * from "./fractionalIndex";
|
|
export * from "./frame";
|
|
export * from "./groups";
|
|
export * from "./heading";
|
|
export * from "./image";
|
|
export * from "./linearElementEditor";
|
|
export * from "./mutateElement";
|
|
export * from "./newElement";
|
|
export * from "./positionElementsOnGrid";
|
|
export * from "./renderElement";
|
|
export * from "./resizeElements";
|
|
export * from "./resizeTest";
|
|
export * from "./Scene";
|
|
export * from "./selection";
|
|
export * from "./shape";
|
|
export * from "./showSelectedShapeActions";
|
|
export * from "./sizeHelpers";
|
|
export * from "./sortElements";
|
|
export * from "./store";
|
|
export * from "./textElement";
|
|
export * from "./textMeasurements";
|
|
export * from "./textWrapping";
|
|
export * from "./transformHandles";
|
|
export * from "./typeChecks";
|
|
export * from "./utils";
|
|
export * from "./zindex";
|