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5321x 5321x 5321x 5321x 5321x 5321x 5321x 5321x 4674x 4674x 4674x 4674x 4674x 4674x 4674x 5321x 5321x 5321x 5321x 5321x 5321x 5321x 2x 2x 2x 2x 2x 2x 2x 5293x 5293x 5293x 2629x 2629x 5293x 5293x 2262x 2262x 2262x 2262x 2262x 2302x 2302x 2302x 2302x 2302x 2262x 2262x 2262x 2262x 2262x 5293x 5293x 5293x 5293x 5293x 5293x 5293x 5293x 5293x 5293x 2x 2x 2x 2x 2x 2x 2x 2x 3043x 657x 657x 2386x 3043x 18x 3043x 2260x 478x 478x 4x 4x 478x 2260x 3043x 2x 2x 2x 2x 2x 2x 2x 2x 2x 44x 44x 44x 22x 44x 22x 44x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 44x 2x 2x 2x 2x 2x 2x 102x 102x 102x 102x 102x 102x 102x 102x 102x 102x 102x 102x 102x 2x 2x 2x 2x 2x 2x 2x 2x | /** @import { ComponentContext, Derived, Effect, Reaction, Signal, Source, Value } from '#client' */
import { DEV } from 'esm-env';
import { define_property, get_descriptors, get_prototype_of } from '../shared/utils.js';
import {
destroy_effect,
effect,
execute_effect_teardown,
unlink_effect
} from './reactivity/effects.js';
import {
EFFECT,
RENDER_EFFECT,
DIRTY,
MAYBE_DIRTY,
CLEAN,
DERIVED,
UNOWNED,
DESTROYED,
INERT,
BRANCH_EFFECT,
STATE_SYMBOL,
BLOCK_EFFECT,
ROOT_EFFECT,
LEGACY_DERIVED_PROP,
DISCONNECTED
} from './constants.js';
import { flush_tasks } from './dom/task.js';
import { add_owner } from './dev/ownership.js';
import { mutate, set, source } from './reactivity/sources.js';
import { destroy_derived, execute_derived, update_derived } from './reactivity/deriveds.js';
import * as e from './errors.js';
import { lifecycle_outside_component } from '../shared/errors.js';
import { FILENAME } from '../../constants.js';
const FLUSH_MICROTASK = 0;
const FLUSH_SYNC = 1;
// Used for DEV time error handling
/** @param {WeakSet<Error>} value */
const handled_errors = new WeakSet();
// Used for controlling the flush of effects.
let scheduler_mode = FLUSH_MICROTASK;
// Used for handling scheduling
let is_micro_task_queued = false;
export let is_flushing_effect = false;
export let is_destroying_effect = false;
/** @param {boolean} value */
export function set_is_flushing_effect(value) {
is_flushing_effect = value;
}
/** @param {boolean} value */
export function set_is_destroying_effect(value) {
is_destroying_effect = value;
}
// Handle effect queues
/** @type {Effect[]} */
let queued_root_effects = [];
let flush_count = 0;
/** @type {Effect[]} Stack of effects, dev only */
let dev_effect_stack = [];
// Handle signal reactivity tree dependencies and reactions
/** @type {null | Reaction} */
export let active_reaction = null;
/** @param {null | Reaction} reaction */
export function set_active_reaction(reaction) {
active_reaction = reaction;
}
/** @type {null | Effect} */
export let active_effect = null;
/** @param {null | Effect} effect */
export function set_active_effect(effect) {
active_effect = effect;
}
/**
* When sources are created within a derived, we record them so that we can safely allow
* local mutations to these sources without the side-effect error being invoked unnecessarily.
* @type {null | Source[]}
*/
export let derived_sources = null;
/**
* @param {Source[] | null} sources
*/
export function set_derived_sources(sources) {
derived_sources = sources;
}
/**
* The dependencies of the reaction that is currently being executed. In many cases,
* the dependencies are unchanged between runs, and so this will be `null` unless
* and until a new dependency is accessed — we track this via `skipped_deps`
* @type {null | Value[]}
*/
export let new_deps = null;
let skipped_deps = 0;
/**
* Tracks writes that the effect it's executed in doesn't listen to yet,
* so that the dependency can be added to the effect later on if it then reads it
* @type {null | Source[]}
*/
export let untracked_writes = null;
/** @param {null | Source[]} value */
export function set_untracked_writes(value) {
untracked_writes = value;
}
/** @type {number} Used by sources and deriveds for handling updates to unowned deriveds */
let current_version = 0;
// If we are working with a get() chain that has no active container,
// to prevent memory leaks, we skip adding the reaction.
export let skip_reaction = false;
// Handle collecting all signals which are read during a specific time frame
export let is_signals_recorded = false;
let captured_signals = new Set();
// Handling runtime component context
/** @type {ComponentContext | null} */
export let component_context = null;
/** @param {ComponentContext | null} context */
export function set_component_context(context) {
component_context = context;
}
/**
* The current component function. Different from current component context:
* ```html
* <!-- App.svelte -->
* <Foo>
* <Bar /> <!-- context == Foo.svelte, function == App.svelte -->
* </Foo>
* ```
* @type {ComponentContext['function']}
*/
export let dev_current_component_function = null;
/** @param {ComponentContext['function']} fn */
export function set_dev_current_component_function(fn) {
dev_current_component_function = fn;
}
export function increment_version() {
return ++current_version;
}
/** @returns {boolean} */
export function is_runes() {
return component_context !== null && component_context.l === null;
}
/**
* Determines whether a derived or effect is dirty.
* If it is MAYBE_DIRTY, will set the status to CLEAN
* @param {Reaction} reaction
* @returns {boolean}
*/
export function check_dirtiness(reaction) {
var flags = reaction.f;
if ((flags & DIRTY) !== 0) {
return true;
}
if ((flags & MAYBE_DIRTY) !== 0) {
var dependencies = reaction.deps;
var is_unowned = (flags & UNOWNED) !== 0;
if (dependencies !== null) {
var i;
if ((flags & DISCONNECTED) !== 0) {
for (i = 0; i < dependencies.length; i++) {
(dependencies[i].reactions ??= []).push(reaction);
}
reaction.f ^= DISCONNECTED;
}
for (i = 0; i < dependencies.length; i++) {
var dependency = dependencies[i];
if (check_dirtiness(/** @type {Derived} */ (dependency))) {
update_derived(/** @type {Derived} */ (dependency));
}
// If we are working with an unowned signal as part of an effect (due to !skip_reaction)
// and the version hasn't changed, we still need to check that this reaction
// is linked to the dependency source – otherwise future updates will not be caught.
if (
is_unowned &&
active_effect !== null &&
!skip_reaction &&
!dependency?.reactions?.includes(reaction)
) {
(dependency.reactions ??= []).push(reaction);
}
if (dependency.version > reaction.version) {
return true;
}
}
}
// Unowned signals should never be marked as clean.
if (!is_unowned) {
set_signal_status(reaction, CLEAN);
}
}
return false;
}
/**
* @param {Error} error
* @param {Effect} effect
* @param {ComponentContext | null} component_context
*/
function handle_error(error, effect, component_context) {
// Given we don't yet have error boundaries, we will just always throw.
if (!DEV || handled_errors.has(error) || component_context === null) {
throw error;
}
const component_stack = [];
const effect_name = effect.fn?.name;
if (effect_name) {
component_stack.push(effect_name);
}
/** @type {ComponentContext | null} */
let current_context = component_context;
while (current_context !== null) {
if (DEV) {
/** @type {string} */
var filename = current_context.function?.[FILENAME];
if (filename) {
const file = filename.split('/').pop();
component_stack.push(file);
}
}
current_context = current_context.p;
}
const indent = /Firefox/.test(navigator.userAgent) ? ' ' : '\t';
define_property(error, 'message', {
value: error.message + `\n${component_stack.map((name) => `\n${indent}in ${name}`).join('')}\n`
});
const stack = error.stack;
// Filter out internal files from callstack
if (stack) {
const lines = stack.split('\n');
const new_lines = [];
for (let i = 0; i < lines.length; i++) {
const line = lines[i];
if (line.includes('svelte/src/internal')) {
continue;
}
new_lines.push(line);
}
define_property(error, 'stack', {
value: error.stack + new_lines.join('\n')
});
}
handled_errors.add(error);
throw error;
}
/**
* @template V
* @param {Reaction} reaction
* @returns {V}
*/
export function update_reaction(reaction) {
var previous_deps = new_deps;
var previous_skipped_deps = skipped_deps;
var previous_untracked_writes = untracked_writes;
var previous_reaction = active_reaction;
var previous_skip_reaction = skip_reaction;
var prev_derived_sources = derived_sources;
var flags = reaction.f;
new_deps = /** @type {null | Value[]} */ (null);
skipped_deps = 0;
untracked_writes = null;
active_reaction = (flags & (BRANCH_EFFECT | ROOT_EFFECT)) === 0 ? reaction : null;
skip_reaction = !is_flushing_effect && (flags & UNOWNED) !== 0;
derived_sources = null;
try {
var result = /** @type {Function} */ (0, reaction.fn)();
var deps = reaction.deps;
if (new_deps !== null) {
var i;
remove_reactions(reaction, skipped_deps);
if (deps !== null && skipped_deps > 0) {
deps.length = skipped_deps + new_deps.length;
for (i = 0; i < new_deps.length; i++) {
deps[skipped_deps + i] = new_deps[i];
}
} else {
reaction.deps = deps = new_deps;
}
if (!skip_reaction) {
for (i = skipped_deps; i < deps.length; i++) {
(deps[i].reactions ??= []).push(reaction);
}
}
} else if (deps !== null && skipped_deps < deps.length) {
remove_reactions(reaction, skipped_deps);
deps.length = skipped_deps;
}
return result;
} finally {
new_deps = previous_deps;
skipped_deps = previous_skipped_deps;
untracked_writes = previous_untracked_writes;
active_reaction = previous_reaction;
skip_reaction = previous_skip_reaction;
derived_sources = prev_derived_sources;
}
}
/**
* @template V
* @param {Reaction} signal
* @param {Value<V>} dependency
* @returns {void}
*/
function remove_reaction(signal, dependency) {
let reactions = dependency.reactions;
if (reactions !== null) {
var index = reactions.indexOf(signal);
if (index !== -1) {
var new_length = reactions.length - 1;
if (new_length === 0) {
reactions = dependency.reactions = null;
} else {
// Swap with last element and then remove.
reactions[index] = reactions[new_length];
reactions.pop();
}
}
}
// If the derived has no reactions, then we can disconnect it from the graph,
// allowing it to either reconnect in the future, or be GC'd by the VM.
if (
reactions === null &&
(dependency.f & DERIVED) !== 0 &&
// Destroying a child effect while updating a parent effect can cause a dependency to appear
// to be unused, when in fact it is used by the currently-updating parent. Checking `new_deps`
// allows us to skip the expensive work of disconnecting and immediately reconnecting it
(new_deps === null || !new_deps.includes(dependency))
) {
set_signal_status(dependency, MAYBE_DIRTY);
// If we are working with a derived that is owned by an effect, then mark it as being
// disconnected.
if ((dependency.f & (UNOWNED | DISCONNECTED)) === 0) {
dependency.f ^= DISCONNECTED;
}
remove_reactions(/** @type {Derived} **/ (dependency), 0);
}
}
/**
* @param {Reaction} signal
* @param {number} start_index
* @returns {void}
*/
export function remove_reactions(signal, start_index) {
var dependencies = signal.deps;
if (dependencies === null) return;
for (var i = start_index; i < dependencies.length; i++) {
remove_reaction(signal, dependencies[i]);
}
}
/**
* @param {Effect} signal
* @param {boolean} remove_dom
* @returns {void}
*/
export function destroy_effect_children(signal, remove_dom = false) {
var deriveds = signal.deriveds;
if (deriveds !== null) {
signal.deriveds = null;
for (var i = 0; i < deriveds.length; i += 1) {
destroy_derived(deriveds[i]);
}
}
var effect = signal.first;
signal.first = signal.last = null;
while (effect !== null) {
var next = effect.next;
destroy_effect(effect, remove_dom);
effect = next;
}
}
/**
* @param {Effect} signal
* @returns {void}
*/
export function destroy_block_effect_children(signal) {
var effect = signal.first;
while (effect !== null) {
var next = effect.next;
if ((effect.f & BRANCH_EFFECT) === 0) {
destroy_effect(effect);
}
effect = next;
}
}
/**
* @param {Effect} effect
* @returns {void}
*/
export function update_effect(effect) {
var flags = effect.f;
if ((flags & DESTROYED) !== 0) {
return;
}
set_signal_status(effect, CLEAN);
var previous_effect = active_effect;
var previous_component_context = component_context;
active_effect = effect;
component_context = effect.ctx;
if (DEV) {
var previous_component_fn = dev_current_component_function;
dev_current_component_function = effect.component_function;
}
try {
if ((flags & BLOCK_EFFECT) !== 0) {
destroy_block_effect_children(effect);
} else {
destroy_effect_children(effect);
}
execute_effect_teardown(effect);
var teardown = update_reaction(effect);
effect.teardown = typeof teardown === 'function' ? teardown : null;
effect.version = current_version;
if (DEV) {
dev_effect_stack.push(effect);
}
} catch (error) {
handle_error(/** @type {Error} */ (error), effect, previous_component_context);
} finally {
active_effect = previous_effect;
component_context = previous_component_context;
if (DEV) {
dev_current_component_function = previous_component_fn;
}
}
}
function infinite_loop_guard() {
if (flush_count > 1000) {
flush_count = 0;
if (DEV) {
try {
e.effect_update_depth_exceeded();
} catch (error) {
// stack is garbage, ignore. Instead add a console.error message.
define_property(error, 'stack', {
value: ''
});
// eslint-disable-next-line no-console
console.error(
'Last ten effects were: ',
dev_effect_stack.slice(-10).map((d) => d.fn)
);
dev_effect_stack = [];
throw error;
}
} else {
e.effect_update_depth_exceeded();
}
}
flush_count++;
}
/**
* @param {Array<Effect>} root_effects
* @returns {void}
*/
function flush_queued_root_effects(root_effects) {
var length = root_effects.length;
if (length === 0) {
return;
}
infinite_loop_guard();
var previously_flushing_effect = is_flushing_effect;
is_flushing_effect = true;
try {
for (var i = 0; i < length; i++) {
var effect = root_effects[i];
if ((effect.f & CLEAN) === 0) {
effect.f ^= CLEAN;
}
/** @type {Effect[]} */
var collected_effects = [];
process_effects(effect, collected_effects);
flush_queued_effects(collected_effects);
}
} finally {
is_flushing_effect = previously_flushing_effect;
}
}
/**
* @param {Array<Effect>} effects
* @returns {void}
*/
function flush_queued_effects(effects) {
var length = effects.length;
if (length === 0) return;
for (var i = 0; i < length; i++) {
var effect = effects[i];
if ((effect.f & (DESTROYED | INERT)) === 0 && check_dirtiness(effect)) {
update_effect(effect);
// Effects with no dependencies or teardown do not get added to the effect tree.
// Deferred effects (e.g. `$effect(...)`) _are_ added to the tree because we
// don't know if we need to keep them until they are executed. Doing the check
// here (rather than in `update_effect`) allows us to skip the work for
// immediate effects.
if (effect.deps === null && effect.first === null && effect.nodes_start === null) {
if (effect.teardown === null) {
// remove this effect from the graph
unlink_effect(effect);
} else {
// keep the effect in the graph, but free up some memory
effect.fn = null;
}
}
}
}
}
function process_deferred() {
is_micro_task_queued = false;
if (flush_count > 1001) {
return;
}
const previous_queued_root_effects = queued_root_effects;
queued_root_effects = [];
flush_queued_root_effects(previous_queued_root_effects);
if (!is_micro_task_queued) {
flush_count = 0;
if (DEV) {
dev_effect_stack = [];
}
}
}
/**
* @param {Effect} signal
* @returns {void}
*/
export function schedule_effect(signal) {
if (scheduler_mode === FLUSH_MICROTASK) {
if (!is_micro_task_queued) {
is_micro_task_queued = true;
queueMicrotask(process_deferred);
}
}
var effect = signal;
while (effect.parent !== null) {
effect = effect.parent;
var flags = effect.f;
if ((flags & (ROOT_EFFECT | BRANCH_EFFECT)) !== 0) {
if ((flags & CLEAN) === 0) return;
effect.f ^= CLEAN;
}
}
queued_root_effects.push(effect);
}
/**
*
* This function both runs render effects and collects user effects in topological order
* from the starting effect passed in. Effects will be collected when they match the filtered
* bitwise flag passed in only. The collected effects array will be populated with all the user
* effects to be flushed.
*
* @param {Effect} effect
* @param {Effect[]} collected_effects
* @returns {void}
*/
function process_effects(effect, collected_effects) {
var current_effect = effect.first;
var effects = [];
main_loop: while (current_effect !== null) {
var flags = current_effect.f;
var is_branch = (flags & BRANCH_EFFECT) !== 0;
var is_skippable_branch = is_branch && (flags & CLEAN) !== 0;
if (!is_skippable_branch && (flags & INERT) === 0) {
if ((flags & RENDER_EFFECT) !== 0) {
if (is_branch) {
current_effect.f ^= CLEAN;
} else if (check_dirtiness(current_effect)) {
update_effect(current_effect);
}
var child = current_effect.first;
if (child !== null) {
current_effect = child;
continue;
}
} else if ((flags & EFFECT) !== 0) {
effects.push(current_effect);
}
}
var sibling = current_effect.next;
if (sibling === null) {
let parent = current_effect.parent;
while (parent !== null) {
if (effect === parent) {
break main_loop;
}
var parent_sibling = parent.next;
if (parent_sibling !== null) {
current_effect = parent_sibling;
continue main_loop;
}
parent = parent.parent;
}
}
current_effect = sibling;
}
// We might be dealing with many effects here, far more than can be spread into
// an array push call (callstack overflow). So let's deal with each effect in a loop.
for (var i = 0; i < effects.length; i++) {
child = effects[i];
collected_effects.push(child);
process_effects(child, collected_effects);
}
}
/**
* Internal version of `flushSync` with the option to not flush previous effects.
* Returns the result of the passed function, if given.
* @param {() => any} [fn]
* @returns {any}
*/
export function flush_sync(fn) {
var previous_scheduler_mode = scheduler_mode;
var previous_queued_root_effects = queued_root_effects;
try {
infinite_loop_guard();
/** @type {Effect[]} */
const root_effects = [];
scheduler_mode = FLUSH_SYNC;
queued_root_effects = root_effects;
is_micro_task_queued = false;
flush_queued_root_effects(previous_queued_root_effects);
var result = fn?.();
flush_tasks();
if (queued_root_effects.length > 0 || root_effects.length > 0) {
flush_sync();
}
flush_count = 0;
if (DEV) {
dev_effect_stack = [];
}
return result;
} finally {
scheduler_mode = previous_scheduler_mode;
queued_root_effects = previous_queued_root_effects;
}
}
/**
* Returns a promise that resolves once any pending state changes have been applied.
* @returns {Promise<void>}
*/
export async function tick() {
await Promise.resolve();
// By calling flush_sync we guarantee that any pending state changes are applied after one tick.
// TODO look into whether we can make flushing subsequent updates synchronously in the future.
flush_sync();
}
/**
* @template V
* @param {Value<V>} signal
* @returns {V}
*/
export function get(signal) {
var flags = signal.f;
var is_derived = (flags & DERIVED) !== 0;
// If the derived is destroyed, just execute it again without retaining
// its memoisation properties as the derived is stale
if (is_derived && (flags & DESTROYED) !== 0) {
var value = execute_derived(/** @type {Derived} */ (signal));
// Ensure the derived remains destroyed
destroy_derived(/** @type {Derived} */ (signal));
return value;
}
if (is_signals_recorded) {
captured_signals.add(signal);
}
// Register the dependency on the current reaction signal.
if (active_reaction !== null) {
if (derived_sources !== null && derived_sources.includes(signal)) {
e.state_unsafe_local_read();
}
var deps = active_reaction.deps;
// If the signal is accessing the same dependencies in the same
// order as it did last time, increment `skipped_deps`
// rather than updating `new_deps`, which creates GC cost
if (new_deps === null && deps !== null && deps[skipped_deps] === signal) {
skipped_deps++;
} else if (new_deps === null) {
new_deps = [signal];
} else {
new_deps.push(signal);
}
if (
untracked_writes !== null &&
active_effect !== null &&
(active_effect.f & CLEAN) !== 0 &&
(active_effect.f & BRANCH_EFFECT) === 0 &&
untracked_writes.includes(signal)
) {
set_signal_status(active_effect, DIRTY);
schedule_effect(active_effect);
}
}
if (is_derived) {
var derived = /** @type {Derived} */ (signal);
if (check_dirtiness(derived)) {
update_derived(derived);
}
}
return signal.v;
}
/**
* Like `get`, but checks for `undefined`. Used for `var` declarations because they can be accessed before being declared
* @template V
* @param {Value<V> | undefined} signal
* @returns {V | undefined}
*/
export function safe_get(signal) {
return signal && get(signal);
}
/**
* Invokes a function and captures all signals that are read during the invocation,
* then invalidates them.
* @param {() => any} fn
*/
export function invalidate_inner_signals(fn) {
var previous_is_signals_recorded = is_signals_recorded;
var previous_captured_signals = captured_signals;
is_signals_recorded = true;
captured_signals = new Set();
var captured = captured_signals;
var signal;
try {
untrack(fn);
} finally {
is_signals_recorded = previous_is_signals_recorded;
if (is_signals_recorded) {
for (signal of captured_signals) {
previous_captured_signals.add(signal);
}
}
captured_signals = previous_captured_signals;
}
for (signal of captured) {
// Go one level up because derived signals created as part of props in legacy mode
if ((signal.f & LEGACY_DERIVED_PROP) !== 0) {
for (const dep of /** @type {Derived} */ (signal).deps || []) {
if ((dep.f & DERIVED) === 0) {
mutate(dep, null /* doesnt matter */);
}
}
} else {
mutate(signal, null /* doesnt matter */);
}
}
}
/**
* Use `untrack` to prevent something from being treated as an `$effect`/`$derived` dependency.
*
* https://svelte-5-preview.vercel.app/docs/functions#untrack
* @template T
* @param {() => T} fn
* @returns {T}
*/
export function untrack(fn) {
const previous_reaction = active_reaction;
try {
active_reaction = null;
return fn();
} finally {
active_reaction = previous_reaction;
}
}
const STATUS_MASK = ~(DIRTY | MAYBE_DIRTY | CLEAN);
/**
* @param {Signal} signal
* @param {number} status
* @returns {void}
*/
export function set_signal_status(signal, status) {
signal.f = (signal.f & STATUS_MASK) | status;
}
/**
* Retrieves the context that belongs to the closest parent component with the specified `key`.
* Must be called during component initialisation.
*
* @template T
* @param {any} key
* @returns {T}
*/
export function getContext(key) {
const context_map = get_or_init_context_map('getContext');
const result = /** @type {T} */ (context_map.get(key));
if (DEV) {
const fn = /** @type {ComponentContext} */ (component_context).function;
if (fn) {
add_owner(result, fn, true);
}
}
return result;
}
/**
* Associates an arbitrary `context` object with the current component and the specified `key`
* and returns that object. The context is then available to children of the component
* (including slotted content) with `getContext`.
*
* Like lifecycle functions, this must be called during component initialisation.
*
* @template T
* @param {any} key
* @param {T} context
* @returns {T}
*/
export function setContext(key, context) {
const context_map = get_or_init_context_map('setContext');
context_map.set(key, context);
return context;
}
/**
* Checks whether a given `key` has been set in the context of a parent component.
* Must be called during component initialisation.
*
* @param {any} key
* @returns {boolean}
*/
export function hasContext(key) {
const context_map = get_or_init_context_map('hasContext');
return context_map.has(key);
}
/**
* Retrieves the whole context map that belongs to the closest parent component.
* Must be called during component initialisation. Useful, for example, if you
* programmatically create a component and want to pass the existing context to it.
*
* @template {Map<any, any>} [T=Map<any, any>]
* @returns {T}
*/
export function getAllContexts() {
const context_map = get_or_init_context_map('getAllContexts');
if (DEV) {
const fn = component_context?.function;
if (fn) {
for (const value of context_map.values()) {
add_owner(value, fn, true);
}
}
}
return /** @type {T} */ (context_map);
}
/**
* @param {string} name
* @returns {Map<unknown, unknown>}
*/
function get_or_init_context_map(name) {
if (component_context === null) {
lifecycle_outside_component(name);
}
return (component_context.c ??= new Map(get_parent_context(component_context) || undefined));
}
/**
* @param {ComponentContext} component_context
* @returns {Map<unknown, unknown> | null}
*/
function get_parent_context(component_context) {
let parent = component_context.p;
while (parent !== null) {
const context_map = parent.c;
if (context_map !== null) {
return context_map;
}
parent = parent.p;
}
return null;
}
/**
* @param {Value<number>} signal
* @param {1 | -1} [d]
* @returns {number}
*/
export function update(signal, d = 1) {
var value = +get(signal);
set(signal, value + d);
return value;
}
/**
* @param {Value<number>} signal
* @param {1 | -1} [d]
* @returns {number}
*/
export function update_pre(signal, d = 1) {
return set(signal, +get(signal) + d);
}
/**
* @param {Record<string, unknown>} obj
* @param {string[]} keys
* @returns {Record<string, unknown>}
*/
export function exclude_from_object(obj, keys) {
/** @type {Record<string, unknown>} */
var result = {};
for (var key in obj) {
if (!keys.includes(key)) {
result[key] = obj[key];
}
}
return result;
}
/**
* @param {Record<string, unknown>} props
* @param {any} runes
* @param {Function} [fn]
* @returns {void}
*/
export function push(props, runes = false, fn) {
component_context = {
p: component_context,
c: null,
e: null,
m: false,
s: props,
x: null,
l: null
};
if (!runes) {
component_context.l = {
s: null,
u: null,
r1: [],
r2: source(false)
};
}
if (DEV) {
// component function
component_context.function = fn;
dev_current_component_function = fn;
}
}
/**
* @template {Record<string, any>} T
* @param {T} [component]
* @returns {T}
*/
export function pop(component) {
const context_stack_item = component_context;
if (context_stack_item !== null) {
if (component !== undefined) {
context_stack_item.x = component;
}
const component_effects = context_stack_item.e;
if (component_effects !== null) {
var previous_effect = active_effect;
var previous_reaction = active_reaction;
context_stack_item.e = null;
try {
for (var i = 0; i < component_effects.length; i++) {
var component_effect = component_effects[i];
set_active_effect(component_effect.effect);
set_active_reaction(component_effect.reaction);
effect(component_effect.fn);
}
} finally {
set_active_effect(previous_effect);
set_active_reaction(previous_reaction);
}
}
component_context = context_stack_item.p;
if (DEV) {
dev_current_component_function = context_stack_item.p?.function ?? null;
}
context_stack_item.m = true;
}
// Micro-optimization: Don't set .a above to the empty object
// so it can be garbage-collected when the return here is unused
return component || /** @type {T} */ ({});
}
/**
* Possibly traverse an object and read all its properties so that they're all reactive in case this is `$state`.
* Does only check first level of an object for performance reasons (heuristic should be good for 99% of all cases).
* @param {any} value
* @returns {void}
*/
export function deep_read_state(value) {
if (typeof value !== 'object' || !value || value instanceof EventTarget) {
return;
}
if (STATE_SYMBOL in value) {
deep_read(value);
} else if (!Array.isArray(value)) {
for (let key in value) {
const prop = value[key];
if (typeof prop === 'object' && prop && STATE_SYMBOL in prop) {
deep_read(prop);
}
}
}
}
/**
* Deeply traverse an object and read all its properties
* so that they're all reactive in case this is `$state`
* @param {any} value
* @param {Set<any>} visited
* @returns {void}
*/
export function deep_read(value, visited = new Set()) {
if (
typeof value === 'object' &&
value !== null &&
// We don't want to traverse DOM elements
!(value instanceof EventTarget) &&
!visited.has(value)
) {
visited.add(value);
// When working with a possible SvelteDate, this
// will ensure we capture changes to it.
if (value instanceof Date) {
value.getTime();
}
for (let key in value) {
try {
deep_read(value[key], visited);
} catch (e) {
// continue
}
}
const proto = get_prototype_of(value);
if (
proto !== Object.prototype &&
proto !== Array.prototype &&
proto !== Map.prototype &&
proto !== Set.prototype &&
proto !== Date.prototype
) {
const descriptors = get_descriptors(proto);
for (let key in descriptors) {
const get = descriptors[key].get;
if (get) {
try {
get.call(value);
} catch (e) {
// continue
}
}
}
}
}
}
if (DEV) {
/**
* @param {string} rune
*/
function throw_rune_error(rune) {
if (!(rune in globalThis)) {
// TODO if people start adjusting the "this can contain runes" config through v-p-s more, adjust this message
/** @type {any} */
let value; // let's hope noone modifies this global, but belts and braces
Object.defineProperty(globalThis, rune, {
configurable: true,
// eslint-disable-next-line getter-return
get: () => {
if (value !== undefined) {
return value;
}
e.rune_outside_svelte(rune);
},
set: (v) => {
value = v;
}
});
}
}
throw_rune_error('$state');
throw_rune_error('$effect');
throw_rune_error('$derived');
throw_rune_error('$inspect');
throw_rune_error('$props');
throw_rune_error('$bindable');
}
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