All files / src/internal/client/reactivity sources.js

98.57% Statements 138/140
95.65% Branches 22/23
100% Functions 4/4
98.5% Lines 132/134

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 1352x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 37528x 37528x 37528x 37528x 37528x 37528x 37528x 37528x 2x 2x 2x 2x 2x 2x 2x 2x 23644x 23644x 23644x 23644x 23644x 23644x 18102x 18102x 23644x 23644x 23644x 2x 2x 2x 2x 2x 2x 2x 782x 782x 782x 782x 782x 782x 2x 2x 2x 2x 2x 2x 2x 2x 24751x 24751x 24751x 24751x 24751x 24751x 1169x 24751x     24751x 24751x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 21365x 125x 21365x 99x 14x 14x 99x 85x 77x 85x 8x 8x 85x 99x 21365x 21365x 21365x 22x 22x 21365x 21365x 21365x 21365x 24751x 24751x 24751x  
import { DEV } from 'esm-env';
import {
	current_component_context,
	current_reaction,
	current_dependencies,
	current_effect,
	current_untracked_writes,
	get,
	is_runes,
	mark_reactions,
	schedule_effect,
	set_current_untracked_writes,
	set_signal_status,
	untrack,
	increment_version,
	execute_effect,
	inspect_effects
} from '../runtime.js';
import { equals, safe_equals } from './equality.js';
import { CLEAN, DERIVED, DIRTY, BRANCH_EFFECT } from '../constants.js';
import { UNINITIALIZED } from '../../../constants.js';
import * as e from '../errors.js';
 
/**
 * @template V
 * @param {V} v
 * @returns {import('#client').Source<V>}
 */
/*#__NO_SIDE_EFFECTS__*/
export function source(v) {
	return {
		f: 0, // TODO ideally we could skip this altogether, but it causes type errors
		v,
		reactions: null,
		equals,
		version: 0
	};
}
 
/**
 * @template V
 * @param {V} initial_value
 * @returns {import('#client').Source<V>}
 */
/*#__NO_SIDE_EFFECTS__*/
export function mutable_source(initial_value) {
	const s = source(initial_value);
	s.equals = safe_equals;
 
	// bind the signal to the component context, in case we need to
	// track updates to trigger beforeUpdate/afterUpdate callbacks
	if (current_component_context !== null && current_component_context.l !== null) {
		(current_component_context.l.s ??= []).push(s);
	}
 
	return s;
}
 
/**
 * @template V
 * @param {import('#client').Value<V>} source
 * @param {V} value
 */
export function mutate(source, value) {
	set(
		source,
		untrack(() => get(source))
	);
	return value;
}
 
/**
 * @template V
 * @param {import('#client').Source<V>} source
 * @param {V} value
 * @returns {V}
 */
export function set(source, value) {
	var initialized = source.v !== UNINITIALIZED;
 
	if (
		initialized &&
		current_reaction !== null &&
		is_runes() &&
		(current_reaction.f & DERIVED) !== 0
	) {
		e.state_unsafe_mutation();
	}
 
	if (!source.equals(value)) {
		source.v = value;
		source.version = increment_version();
 
		mark_reactions(source, DIRTY, true);
 
		// If the current signal is running for the first time, it won't have any
		// reactions as we only allocate and assign the reactions after the signal
		// has fully executed. So in the case of ensuring it registers the reaction
		// properly for itself, we need to ensure the current effect actually gets
		// scheduled. i.e:
		//
		// $effect(() => x++)
		//
		// We additionally want to skip this logic when initialising store sources
		if (
			is_runes() &&
			initialized &&
			current_effect !== null &&
			(current_effect.f & CLEAN) !== 0 &&
			(current_effect.f & BRANCH_EFFECT) === 0
		) {
			if (current_dependencies !== null && current_dependencies.includes(source)) {
				set_signal_status(current_effect, DIRTY);
				schedule_effect(current_effect);
			} else {
				if (current_untracked_writes === null) {
					set_current_untracked_writes([source]);
				} else {
					current_untracked_writes.push(source);
				}
			}
		}
 
		if (DEV) {
			for (const effect of inspect_effects) {
				execute_effect(effect);
			}
 
			inspect_effects.clear();
		}
	}
 
	return value;
}