61 lines
1.8 KiB
TypeScript
61 lines
1.8 KiB
TypeScript
import { ExcalidrawElement } from "./types";
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import { invalidateShapeForElement } from "../renderer/renderElement";
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import { globalSceneState } from "../scene";
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import { getSizeFromPoints } from "../points";
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import { randomInteger } from "../random";
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type ElementUpdate<TElement extends ExcalidrawElement> = Omit<
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Partial<TElement>,
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"id" | "seed"
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>;
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// This function tracks updates of text elements for the purposes for collaboration.
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// The version is used to compare updates when more than one user is working in
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// the same drawing. Note: this will trigger the component to update. Make sure you
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// are calling it either from a React event handler or within unstable_batchedUpdates().
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export function mutateElement<TElement extends Mutable<ExcalidrawElement>>(
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element: TElement,
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updates: ElementUpdate<TElement>,
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) {
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// casting to any because can't use `in` operator
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// (see https://github.com/microsoft/TypeScript/issues/21732)
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const { points } = updates as any;
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if (typeof points !== "undefined") {
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updates = { ...getSizeFromPoints(points), ...updates };
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}
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for (const key in updates) {
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const value = (updates as any)[key];
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if (typeof value !== "undefined") {
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// @ts-ignore
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element[key] = value;
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}
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}
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if (
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typeof updates.height !== "undefined" ||
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typeof updates.width !== "undefined" ||
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typeof points !== "undefined"
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) {
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invalidateShapeForElement(element);
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}
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element.version++;
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element.versionNonce = randomInteger();
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globalSceneState.informMutation();
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}
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export function newElementWith<TElement extends ExcalidrawElement>(
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element: TElement,
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updates: ElementUpdate<TElement>,
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): TElement {
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return {
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...element,
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version: element.version + 1,
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versionNonce: randomInteger(),
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...updates,
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};
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}
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