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import { DEV } from 'esm-env';
import { source, set } from '../internal/client/reactivity/sources.js';
import { get } from '../internal/client/runtime.js';
import { increment } from './utils.js';
/**
* @template K
* @template V
* @extends {Map<K, V>}
*/
export class SvelteMap extends Map {
/** @type {Map<K, Source<number>>} */
#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) {
for (var [key, v] of value) {
super.set(key, v);
}
this.#size.v = super.size;
}
}
/** @param {K} key */
has(key) {
var sources = this.#sources;
var s = sources.get(key);
if (s === undefined) {
var ret = super.get(key);
if (ret !== undefined) {
s = source(0);
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 true;
}
/**
* @param {(value: V, key: K, map: Map<K, V>) => void} callbackfn
* @param {any} [this_arg]
*/
forEach(callbackfn, this_arg) {
this.#read_all();
super.forEach(callbackfn, this_arg);
}
/** @param {K} key */
get(key) {
var sources = this.#sources;
var s = sources.get(key);
if (s === undefined) {
var ret = super.get(key);
if (ret !== undefined) {
s = source(0);
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 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(0));
set(this.#size, super.size);
increment(this.#version);
} else if (prev_res !== value) {
increment(s);
}
return res;
}
/** @param {K} key */
delete(key) {
var sources = this.#sources;
var s = sources.get(key);
var res = super.delete(key);
if (s !== undefined) {
sources.delete(key);
set(this.#size, super.size);
set(s, -1);
increment(this.#version);
}
return res;
}
clear() {
if (super.size === 0) {
return;
}
// Clear first, so we get nice console.log outputs with $inspect
super.clear();
var sources = this.#sources;
set(this.#size, 0);
for (var s of sources.values()) {
set(s, -1);
}
increment(this.#version);
sources.clear();
}
#read_all() {
get(this.#version);
var sources = this.#sources;
if (this.#size.v !== sources.size) {
for (var key of super.keys()) {
if (!sources.has(key)) {
sources.set(key, source(0));
}
}
}
for (var [, s] of this.#sources) {
get(s);
}
}
keys() {
get(this.#version);
return super.keys();
}
values() {
this.#read_all();
return super.values();
}
entries() {
this.#read_all();
return super.entries();
}
[Symbol.iterator]() {
return this.entries();
}
get size() {
get(this.#size);
return super.size;
}
}
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