@tldraw/editor
Version:
tldraw infinite canvas SDK (editor).
64 lines (63 loc) • 1.98 kB
JavaScript
;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
if (from && typeof from === "object" || typeof from === "function") {
for (let key of __getOwnPropNames(from))
if (!__hasOwnProp.call(to, key) && key !== except)
__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
}
return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var useIdentity_exports = {};
__export(useIdentity_exports, {
useShallowArrayIdentity: () => useShallowArrayIdentity,
useShallowObjectIdentity: () => useShallowObjectIdentity
});
module.exports = __toCommonJS(useIdentity_exports);
var import_utils = require("@tldraw/utils");
var import_react = require("react");
function useIdentity(value, isEqual) {
const ref = (0, import_react.useRef)(value);
if (isEqual(value, ref.current)) {
return ref.current;
}
ref.current = value;
return value;
}
const areNullableArraysShallowEqual = (a, b) => {
a ??= null;
b ??= null;
if (a === b) {
return true;
}
if (!a || !b) {
return false;
}
return (0, import_utils.areArraysShallowEqual)(a, b);
};
function useShallowArrayIdentity(arr) {
return useIdentity(arr, areNullableArraysShallowEqual);
}
const areNullableObjectsShallowEqual = (a, b) => {
a ??= null;
b ??= null;
if (a === b) {
return true;
}
if (!a || !b) {
return false;
}
return (0, import_utils.areObjectsShallowEqual)(a, b);
};
function useShallowObjectIdentity(obj) {
return useIdentity(obj, areNullableObjectsShallowEqual);
}
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