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import { source, set } from '../internal/client/reactivity/sources.js';
import { get } from '../internal/client/runtime.js';
import { UNINITIALIZED } from '../constants.js';
/**
* @template K
* @template V
* @extends {Map<K, V>}
*/
export class ReactiveMap extends Map {
/** @type {Map<K, import('#client').Source<symbol>>} */
#sources = new Map();
#version = source(0);
#size = source(0);
/**
* @param {Iterable<readonly [K, V]> | null | undefined} [value]
*/
constructor(value) {
super();
// If the value is invalid then the native exception will fire here
if (DEV) new Map(value);
if (value) {
var sources = this.#sources;
for (var [key, v] of value) {
sources.set(key, source(Symbol()));
super.set(key, v);
}
this.#size.v = sources.size;
}
}
#increment_version() {
set(this.#version, this.#version.v + 1);
}
/** @param {K} key */
has(key) {
var sources = this.#sources;
var s = sources.get(key);
if (s === undefined) {
// If we're working with a non-primitive then we can generate a signal for it
if (typeof key !== 'object' || key === null) {
s = source(UNINITIALIZED);
sources.set(key, s);
} else {
// We should always track the version in case
// the Set ever gets this value in the future.
get(this.#version);
return false;
}
}
get(s);
return super.has(key);
}
/**
* @param {(value: V, key: K, map: Map<K, V>) => void} callbackfn
* @param {any} [this_arg]
*/
forEach(callbackfn, this_arg) {
get(this.#version);
return super.forEach(callbackfn, this_arg);
}
/** @param {K} key */
get(key) {
var s = this.#sources.get(key);
if (s === undefined) {
// Re-use the has code-path to init the signal if needed and also
// register to the version if needed.
this.has(key);
s = this.#sources.get(key);
if (s === undefined) {
return undefined;
}
}
get(s);
return super.get(key);
}
/**
* @param {K} key
* @param {V} value
* */
set(key, value) {
var sources = this.#sources;
var s = sources.get(key);
var prev_res = super.get(key);
var res = super.set(key, value);
if (s === undefined) {
sources.set(key, source(Symbol()));
set(this.#size, super.size);
this.#increment_version();
} else if (prev_res !== value) {
set(s, Symbol());
}
return res;
}
/** @param {K} key */
delete(key) {
var sources = this.#sources;
var s = sources.get(key);
var res = super.delete(key);
if (s !== undefined) {
// Remove non-primitive keys
if (typeof key === 'object' && key !== null) {
sources.delete(key);
}
set(this.#size, super.size);
set(s, UNINITIALIZED);
this.#increment_version();
}
return res;
}
clear() {
var sources = this.#sources;
if (sources.size !== 0) {
set(this.#size, 0);
for (var s of sources.values()) {
set(s, UNINITIALIZED);
}
this.#increment_version();
}
sources.clear();
super.clear();
}
keys() {
get(this.#version);
return super.keys();
}
values() {
get(this.#version);
return super.values();
}
entries() {
get(this.#version);
return super.entries();
}
[Symbol.iterator]() {
return this.entries();
}
get size() {
return get(this.#size);
}
}
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