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import { on_destroy } from './index.js';
/** @type {import('#server').Component | null} */
export var current_component = null;
/**
* @template T
* @param {any} key
* @returns {T}
*/
export function getContext(key) {
const context_map = getAllContexts();
const result = /** @type {T} */ (context_map.get(key));
return result;
}
/**
* @template T
* @param {any} key
* @param {T} context
* @returns {T}
*/
export function setContext(key, context) {
getAllContexts().set(key, context);
return context;
}
/**
* @param {any} key
* @returns {boolean}
*/
export function hasContext(key) {
return getAllContexts().has(key);
}
/** @returns {Map<any, any>} */
export function getAllContexts() {
const context = current_component;
if (context === null) {
throw new Error(
'ERR_SVELTE_ORPHAN_CONTEXT' +
(DEV ? 'Context can only be used during component initialisation.' : '')
);
}
return (context.c ??= new Map(get_parent_context(context) || undefined));
}
export function push() {
current_component = { p: current_component, c: null, d: null };
}
export function pop() {
var component = /** @type {import('#server').Component} */ (current_component);
var ondestroy = component.d;
if (ondestroy) {
on_destroy.push(...ondestroy);
}
current_component = component.p;
}
/**
* @param {import('#server').Component} 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;
}
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