All files / src/internal/client/dom/blocks snippet.js

100% Statements 61/61
100% Branches 9/9
100% Functions 2/2
100% Lines 57/57

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 582x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 85x 85x 85x 85x 85x 85x 85x 103x 99x 103x 14x 14x 14x 99x 99x 99x 99x 85x 85x 2x 2x 2x 2x 2x 2x 2x 2x 35x 35x 34x 34x 34x 34x 34x 34x 34x 34x 34x 35x 35x  
import { add_snippet_symbol } from '../../../shared/validate.js';
import { EFFECT_TRANSPARENT } from '../../constants.js';
import { branch, block, destroy_effect } from '../../reactivity/effects.js';
import {
	current_component_context,
	dev_current_component_function,
	set_dev_current_component_function
} from '../../runtime.js';
 
/**
 * @template {(node: import('#client').TemplateNode, ...args: any[]) => import('#client').Dom} SnippetFn
 * @param {() => SnippetFn | null | undefined} get_snippet
 * @param {import('#client').TemplateNode} node
 * @param {(() => any)[]} args
 * @returns {void}
 */
export function snippet(get_snippet, node, ...args) {
	/** @type {SnippetFn | null | undefined} */
	var snippet;
 
	/** @type {import('#client').Effect | null} */
	var snippet_effect;
 
	block(() => {
		if (snippet === (snippet = get_snippet())) return;
 
		if (snippet_effect) {
			destroy_effect(snippet_effect);
			snippet_effect = null;
		}
 
		if (snippet) {
			snippet_effect = branch(() => /** @type {SnippetFn} */ (snippet)(node, ...args));
		}
	}, EFFECT_TRANSPARENT);
}
 
/**
 * In development, wrap the snippet function so that it passes validation, and so that the
 * correct component context is set for ownership checks
 * @param {(node: import('#client').TemplateNode, ...args: any[]) => import('#client').Dom} fn
 * @param {any} component
 */
export function wrap_snippet(fn, component) {
	return add_snippet_symbol(
		(/** @type {import('#client').TemplateNode} */ node, /** @type {any[]} */ ...args) => {
			var previous_component_function = dev_current_component_function;
			set_dev_current_component_function(component);
 
			try {
				return fn(node, ...args);
			} finally {
				set_dev_current_component_function(previous_component_function);
			}
		}
	);
}