Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 3376x 3376x 1476x 1476x 1900x 1900x 1900x 3376x 64x 64x 1836x 1836x 1836x 1836x 1836x 1836x 3376x 635x 635x 635x 635x 1836x 1836x 1836x 1836x 1836x 1836x 1836x 1836x 1836x 1836x 1836x 20x 20x 20x 20x 20x 1836x 1816x 1816x 1816x 1136x 1136x 1816x 1816x 1836x 1836x 1836x 1836x 3x 3x 3x 3x 2x 3x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 3x 2x 2x 1836x 1836x 1836x 33x 33x 33x 2x 1x 1x 33x 31x 31x 31x 33x 33x 1836x 1836x 1836x 5707x 1313x 1313x 4394x 5707x 24x 24x 4370x 4370x 4370x 4370x 4370x 5707x 789x 789x 789x 4370x 5701x 3988x 3988x 3988x 3988x 3988x 3988x 3988x 3988x 3988x 3988x 3988x 3988x 3988x 52x 52x 3988x 3988x 3988x 3988x 382x 382x 1836x 1836x 1836x 235x 235x 235x 212x 212x 234x 23x 23x 23x 23x 7x 7x 7x 7x 7x 7x 7x 23x 228x 228x 1836x 1836x 1836x 314x 314x 314x 108x 108x 206x 206x 314x 314x 314x 314x 26x 314x 198x 18x 18x 18x 198x 198x 198x 12x 12x 198x 194x 194x 1836x 1836x 1836x 1052x 1052x 1052x 1052x 1052x 114x 36x 36x 33x 36x 3x 3x 3x 3x 3x 3x 36x 114x 1052x 1052x 1052x 1052x 1052x 1052x 105x 99x 99x 99x 99x 1052x 947x 947x 947x 1052x 1052x 1052x 1052x 1052x 4x 4x 1052x 1052x 1052x 1052x 1052x 1052x 1052x 6x 6x 1052x 1052x 127x 127x 127x 127x 127x 96x 96x 96x 96x 96x 96x 96x 127x 127x 127x 1052x 1052x 1836x 1836x 1836x 273x 273x 273x 198x 198x 273x 273x 273x 160x 6x 6x 160x 273x 273x 1836x 1836x 1836x 1836x 1836x 2x 2x 2x 2x 2x 158x 158x 158x 2x 2x 2x 2x 2x 1836586x 10x 10x 1836576x 1836576x 1836576x 2x 2x 2x 2x 2x 2x 568x 568x | /** @import { ProxyMetadata, ProxyStateObject, Source } from '#client' */
import { DEV } from 'esm-env';
import { get, component_context, active_effect } from './runtime.js';
import {
array_prototype,
get_descriptor,
get_prototype_of,
is_array,
object_prototype
} from '../shared/utils.js';
import { check_ownership, widen_ownership } from './dev/ownership.js';
import { source, set } from './reactivity/sources.js';
import { STATE_SYMBOL, STATE_SYMBOL_METADATA } from './constants.js';
import { UNINITIALIZED } from '../../constants.js';
import * as e from './errors.js';
/**
* @template T
* @param {T} value
* @param {ProxyMetadata | null} [parent]
* @param {Source<T>} [prev] dev mode only
* @returns {T}
*/
export function proxy(value, parent = null, prev) {
// if non-proxyable, or is already a proxy, return `value`
if (typeof value !== 'object' || value === null || STATE_SYMBOL in value) {
return value;
}
const prototype = get_prototype_of(value);
if (prototype !== object_prototype && prototype !== array_prototype) {
return value;
}
/** @type {Map<any, Source<any>>} */
var sources = new Map();
var is_proxied_array = is_array(value);
var version = source(0);
if (is_proxied_array) {
// We need to create the length source eagerly to ensure that
// mutations to the array are properly synced with our proxy
sources.set('length', source(/** @type {any[]} */ (value).length));
}
/** @type {ProxyMetadata} */
var metadata;
if (DEV) {
metadata = {
parent,
owners: null
};
if (prev) {
// Reuse owners from previous state; necessary because reassignment is not guaranteed to have correct component context.
// If no previous proxy exists we play it safe and assume ownerless state
// @ts-expect-error
const prev_owners = prev.v?.[STATE_SYMBOL_METADATA]?.owners;
metadata.owners = prev_owners ? new Set(prev_owners) : null;
} else {
metadata.owners =
parent === null
? component_context !== null
? new Set([component_context.function])
: null
: new Set();
}
}
return new Proxy(/** @type {any} */ (value), {
defineProperty(_, prop, descriptor) {
if (
!('value' in descriptor) ||
descriptor.configurable === false ||
descriptor.enumerable === false ||
descriptor.writable === false
) {
// we disallow non-basic descriptors, because unless they are applied to the
// target object — which we avoid, so that state can be forked — we will run
// afoul of the various invariants
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/getOwnPropertyDescriptor#invariants
e.state_descriptors_fixed();
}
var s = sources.get(prop);
if (s === undefined) {
s = source(descriptor.value);
sources.set(prop, s);
} else {
set(s, proxy(descriptor.value, metadata));
}
return true;
},
deleteProperty(target, prop) {
var s = sources.get(prop);
if (s === undefined) {
if (prop in target) {
sources.set(prop, source(UNINITIALIZED));
}
} else {
set(s, UNINITIALIZED);
update_version(version);
}
return true;
},
get(target, prop, receiver) {
if (DEV && prop === STATE_SYMBOL_METADATA) {
return metadata;
}
if (prop === STATE_SYMBOL) {
return value;
}
var s = sources.get(prop);
var exists = prop in target;
// create a source, but only if it's an own property and not a prototype property
if (s === undefined && (!exists || get_descriptor(target, prop)?.writable)) {
s = source(proxy(exists ? target[prop] : UNINITIALIZED, metadata));
sources.set(prop, s);
}
if (s !== undefined) {
var v = get(s);
// In case of something like `foo = bar.map(...)`, foo would have ownership
// of the array itself, while the individual items would have ownership
// of the component that created bar. That means if we later do `foo[0].baz = 42`,
// we could get a false-positive ownership violation, since the two proxies
// are not connected to each other via the parent metadata relationship.
// For this reason, we need to widen the ownership of the children
// upon access when we detect they are not connected.
if (DEV) {
/** @type {ProxyMetadata | undefined} */
var prop_metadata = v?.[STATE_SYMBOL_METADATA];
if (prop_metadata && prop_metadata?.parent !== metadata) {
widen_ownership(metadata, prop_metadata);
}
}
return v === UNINITIALIZED ? undefined : v;
}
return Reflect.get(target, prop, receiver);
},
getOwnPropertyDescriptor(target, prop) {
var descriptor = Reflect.getOwnPropertyDescriptor(target, prop);
if (descriptor && 'value' in descriptor) {
var s = sources.get(prop);
if (s) descriptor.value = get(s);
} else if (descriptor === undefined) {
var source = sources.get(prop);
var value = source?.v;
if (source !== undefined && value !== UNINITIALIZED) {
return {
enumerable: true,
configurable: true,
value,
writable: true
};
}
}
return descriptor;
},
has(target, prop) {
if (DEV && prop === STATE_SYMBOL_METADATA) {
return true;
}
if (prop === STATE_SYMBOL) {
return true;
}
var s = sources.get(prop);
var has = (s !== undefined && s.v !== UNINITIALIZED) || Reflect.has(target, prop);
if (
s !== undefined ||
(active_effect !== null && (!has || get_descriptor(target, prop)?.writable))
) {
if (s === undefined) {
s = source(has ? proxy(target[prop], metadata) : UNINITIALIZED);
sources.set(prop, s);
}
var value = get(s);
if (value === UNINITIALIZED) {
return false;
}
}
return has;
},
set(target, prop, value, receiver) {
var s = sources.get(prop);
var has = prop in target;
// variable.length = value -> clear all signals with index >= value
if (is_proxied_array && prop === 'length') {
for (var i = value; i < /** @type {Source<number>} */ (s).v; i += 1) {
var other_s = sources.get(i + '');
if (other_s !== undefined) {
set(other_s, UNINITIALIZED);
} else if (i in target) {
// If the item exists in the original, we need to create a uninitialized source,
// else a later read of the property would result in a source being created with
// the value of the original item at that index.
other_s = source(UNINITIALIZED);
sources.set(i + '', other_s);
}
}
}
// If we haven't yet created a source for this property, we need to ensure
// we do so otherwise if we read it later, then the write won't be tracked and
// the heuristics of effects will be different vs if we had read the proxied
// object property before writing to that property.
if (s === undefined) {
if (!has || get_descriptor(target, prop)?.writable) {
s = source(undefined);
set(s, proxy(value, metadata));
sources.set(prop, s);
}
} else {
has = s.v !== UNINITIALIZED;
set(s, proxy(value, metadata));
}
if (DEV) {
/** @type {ProxyMetadata | undefined} */
var prop_metadata = value?.[STATE_SYMBOL_METADATA];
if (prop_metadata && prop_metadata?.parent !== metadata) {
widen_ownership(metadata, prop_metadata);
}
check_ownership(metadata);
}
var descriptor = Reflect.getOwnPropertyDescriptor(target, prop);
// Set the new value before updating any signals so that any listeners get the new value
if (descriptor?.set) {
descriptor.set.call(receiver, value);
}
if (!has) {
// If we have mutated an array directly, we might need to
// signal that length has also changed. Do it before updating metadata
// to ensure that iterating over the array as a result of a metadata update
// will not cause the length to be out of sync.
if (is_proxied_array && typeof prop === 'string') {
var ls = /** @type {Source<number>} */ (sources.get('length'));
var n = Number(prop);
if (Number.isInteger(n) && n >= ls.v) {
set(ls, n + 1);
}
}
update_version(version);
}
return true;
},
ownKeys(target) {
get(version);
var own_keys = Reflect.ownKeys(target).filter((key) => {
var source = sources.get(key);
return source === undefined || source.v !== UNINITIALIZED;
});
for (var [key, source] of sources) {
if (source.v !== UNINITIALIZED && !(key in target)) {
own_keys.push(key);
}
}
return own_keys;
},
setPrototypeOf() {
e.state_prototype_fixed();
}
});
}
/**
* @param {Source<number>} signal
* @param {1 | -1} [d]
*/
function update_version(signal, d = 1) {
set(signal, signal.v + d);
}
/**
* @param {any} value
*/
export function get_proxied_value(value) {
if (value !== null && typeof value === 'object' && STATE_SYMBOL in value) {
return value[STATE_SYMBOL];
}
return value;
}
/**
* @param {any} a
* @param {any} b
*/
export function is(a, b) {
return Object.is(get_proxied_value(a), get_proxied_value(b));
}
|