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import { clear_text_content, empty, init_operations } from './dom/operations.js';
import {
HYDRATION_END,
HYDRATION_ERROR,
HYDRATION_START,
PassiveDelegatedEvents
} from '../../constants.js';
import { flush_sync, push, pop, current_component_context, current_effect } from './runtime.js';
import { effect_root, branch } from './reactivity/effects.js';
import {
hydrate_next,
hydrate_node,
hydrating,
set_hydrate_node,
set_hydrating
} from './dom/hydration.js';
import { array_from } from './utils.js';
import {
all_registered_events,
handle_event_propagation,
root_event_handles
} from './dom/elements/events.js';
import { reset_head_anchor } from './dom/blocks/svelte-head.js';
import * as w from './warnings.js';
import * as e from './errors.js';
import { validate_component } from '../shared/validate.js';
import { assign_nodes } from './dom/template.js';
import { queue_micro_task } from './dom/task.js';
/**
* This is normally true — block effects should run their intro transitions —
* but is false during hydration (unless `options.intro` is `true`) and
* when creating the children of a `<svelte:element>` that just changed tag
*/
export let should_intro = true;
/** @param {boolean} value */
export function set_should_intro(value) {
should_intro = value;
}
/**
* @param {Element} text
* @param {string} value
* @returns {void}
*/
export function set_text(text, value) {
// @ts-expect-error
const prev = (text.__t ??= text.nodeValue);
if (prev !== value) {
// @ts-expect-error
text.nodeValue = text.__t = value;
}
}
/**
* Mounts a component to the given target and returns the exports and potentially the props (if compiled with `accessors: true`) of the component.
* Transitions will play during the initial render unless the `intro` option is set to `false`.
*
* @template {Record<string, any>} Props
* @template {Record<string, any>} Exports
* @param {import('../../index.js').ComponentType<import('../../index.js').SvelteComponent<Props>> | import('../../index.js').Component<Props, Exports, any>} component
* @param {{} extends Props ? {
* target: Document | Element | ShadowRoot;
* anchor?: Node;
* props?: Props;
* events?: Record<string, (e: any) => any>;
* context?: Map<any, any>;
* intro?: boolean;
* }: {
* target: Document | Element | ShadowRoot;
* props: Props;
* anchor?: Node;
* events?: Record<string, (e: any) => any>;
* context?: Map<any, any>;
* intro?: boolean;
* }} options
* @returns {Exports}
*/
export function mount(component, options) {
if (DEV) {
validate_component(component);
}
const anchor = options.anchor ?? options.target.appendChild(empty());
// Don't flush previous effects to ensure order of outer effects stays consistent
return flush_sync(() => _mount(component, { ...options, anchor }), false);
}
/**
* Hydrates a component on the given target and returns the exports and potentially the props (if compiled with `accessors: true`) of the component
*
* @template {Record<string, any>} Props
* @template {Record<string, any>} Exports
* @param {import('../../index.js').ComponentType<import('../../index.js').SvelteComponent<Props>> | import('../../index.js').Component<Props, Exports, any>} component
* @param {{} extends Props ? {
* target: Document | Element | ShadowRoot;
* props?: Props;
* events?: Record<string, (e: any) => any>;
* context?: Map<any, any>;
* intro?: boolean;
* recover?: boolean;
* } : {
* target: Document | Element | ShadowRoot;
* props: Props;
* events?: Record<string, (e: any) => any>;
* context?: Map<any, any>;
* intro?: boolean;
* recover?: boolean;
* }} options
* @returns {Exports}
*/
export function hydrate(component, options) {
if (DEV) {
validate_component(component);
}
options.intro = options.intro ?? false;
const target = options.target;
const was_hydrating = hydrating;
try {
// Don't flush previous effects to ensure order of outer effects stays consistent
return flush_sync(() => {
var anchor = /** @type {import('#client').TemplateNode} */ (target.firstChild);
while (
anchor &&
(anchor.nodeType !== 8 || /** @type {Comment} */ (anchor).data !== HYDRATION_START)
) {
anchor = /** @type {import('#client').TemplateNode} */ (anchor.nextSibling);
}
if (!anchor) {
throw HYDRATION_ERROR;
}
set_hydrating(true);
set_hydrate_node(/** @type {Comment} */ (anchor));
hydrate_next();
const instance = _mount(component, { ...options, anchor });
if (
hydrate_node.nodeType !== 8 ||
/** @type {Comment} */ (hydrate_node).data !== HYDRATION_END
) {
w.hydration_mismatch();
throw HYDRATION_ERROR;
}
// flush_sync will run this callback and then synchronously run any pending effects,
// which don't belong to the hydration phase anymore - therefore reset it here
set_hydrating(false);
return instance;
}, false);
} catch (error) {
if (error === HYDRATION_ERROR) {
// TODO it's possible for event listeners to have been added and
// not removed, e.g. with `<svelte:window>` or `<svelte:document>`
if (options.recover === false) {
e.hydration_failed();
}
// If an error occured above, the operations might not yet have been initialised.
init_operations();
clear_text_content(target);
set_hydrating(false);
return mount(component, options);
}
throw error;
} finally {
set_hydrating(was_hydrating);
reset_head_anchor();
}
}
/** @type {Map<string, number>} */
const document_listeners = new Map();
/**
* @template {Record<string, any>} Exports
* @param {import('../../index.js').ComponentType<import('../../index.js').SvelteComponent<any>> | import('../../index.js').Component<any>} Component
* @param {{
* target: Document | Element | ShadowRoot;
* anchor: Node;
* props?: any;
* events?: any;
* context?: Map<any, any>;
* intro?: boolean;
* }} options
* @returns {Exports}
*/
function _mount(Component, { target, anchor, props = {}, events, context, intro = true }) {
init_operations();
var registered_events = new Set();
/** @param {Array<string>} events */
var event_handle = (events) => {
for (var i = 0; i < events.length; i++) {
var event_name = events[i];
if (registered_events.has(event_name)) continue;
registered_events.add(event_name);
var passive = PassiveDelegatedEvents.includes(event_name);
// Add the event listener to both the container and the document.
// The container listener ensures we catch events from within in case
// the outer content stops propagation of the event.
target.addEventListener(event_name, handle_event_propagation, { passive });
var n = document_listeners.get(event_name);
if (n === undefined) {
// The document listener ensures we catch events that originate from elements that were
// manually moved outside of the container (e.g. via manual portals).
document.addEventListener(event_name, handle_event_propagation, { passive });
document_listeners.set(event_name, 1);
} else {
document_listeners.set(event_name, n + 1);
}
}
};
event_handle(array_from(all_registered_events));
root_event_handles.add(event_handle);
/** @type {Exports} */
// @ts-expect-error will be defined because the render effect runs synchronously
var component = undefined;
var unmount = effect_root(() => {
branch(() => {
if (context) {
push({});
var ctx = /** @type {import('#client').ComponentContext} */ (current_component_context);
ctx.c = context;
}
if (events) {
// We can't spread the object or else we'd lose the state proxy stuff, if it is one
/** @type {any} */ (props).$$events = events;
}
if (hydrating) {
assign_nodes(/** @type {import('#client').TemplateNode} */ (anchor), null);
}
should_intro = intro;
// @ts-expect-error the public typings are not what the actual function looks like
component = Component(anchor, props) || {};
should_intro = true;
if (hydrating) {
/** @type {import('#client').Effect & { nodes: import('#client').EffectNodes }} */ (
current_effect
).nodes.end = hydrate_node;
}
if (context) {
pop();
}
});
return () => {
for (var event_name of registered_events) {
target.removeEventListener(event_name, handle_event_propagation);
var n = /** @type {number} */ (document_listeners.get(event_name));
if (--n === 0) {
document.removeEventListener(event_name, handle_event_propagation);
document_listeners.delete(event_name);
} else {
document_listeners.set(event_name, n);
}
}
root_event_handles.delete(event_handle);
mounted_components.delete(component);
};
});
mounted_components.set(component, unmount);
return component;
}
/**
* References of the components that were mounted or hydrated.
* Uses a `WeakMap` to avoid memory leaks.
*/
let mounted_components = new WeakMap();
/**
* Unmounts a component that was previously mounted using `mount` or `hydrate`.
* @param {Record<string, any>} component
*/
export function unmount(component) {
const fn = mounted_components.get(component);
if (DEV && !fn) {
w.lifecycle_double_unmount();
// eslint-disable-next-line no-console
console.trace('stack trace');
}
fn?.();
}
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