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import { subscribe_to_store } from '../../store/utils.js'; import { UNINITIALIZED, DOMBooleanAttributes, RawTextElements, ELEMENT_PRESERVE_ATTRIBUTE_CASE, ELEMENT_IS_NAMESPACED } from '../../constants.js'; import { escape_html } from '../../escaping.js'; import { DEV } from 'esm-env'; import { current_component, pop, push } from './context.js'; import { BLOCK_ANCHOR, BLOCK_CLOSE, BLOCK_OPEN } from './hydration.js'; import { validate_store } from '../shared/validate.js'; // https://html.spec.whatwg.org/multipage/syntax.html#attributes-2 // https://infra.spec.whatwg.org/#noncharacter const INVALID_ATTR_NAME_CHAR_REGEX = /[\s'">/=\u{FDD0}-\u{FDEF}\u{FFFE}\u{FFFF}\u{1FFFE}\u{1FFFF}\u{2FFFE}\u{2FFFF}\u{3FFFE}\u{3FFFF}\u{4FFFE}\u{4FFFF}\u{5FFFE}\u{5FFFF}\u{6FFFE}\u{6FFFF}\u{7FFFE}\u{7FFFF}\u{8FFFE}\u{8FFFF}\u{9FFFE}\u{9FFFF}\u{AFFFE}\u{AFFFF}\u{BFFFE}\u{BFFFF}\u{CFFFE}\u{CFFFF}\u{DFFFE}\u{DFFFF}\u{EFFFE}\u{EFFFF}\u{FFFFE}\u{FFFFF}\u{10FFFE}\u{10FFFF}]/u; export const VoidElements = new Set([ 'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'keygen', 'link', 'menuitem', 'meta', 'param', 'source', 'track', 'wbr' ]); /** @returns {import('#server').Payload} */ function create_payload() { return { out: '', head: { title: '', out: '', anchor: 0 }, anchor: 0 }; } /** * @param {import('#server').Payload} to_copy * @returns {import('#server').Payload} */ export function copy_payload(to_copy) { return { ...to_copy, head: { ...to_copy.head } }; } /** * Assigns second payload to first * @param {import('#server').Payload} p1 * @param {import('#server').Payload} p2 * @returns {void} */ export function assign_payload(p1, p2) { p1.out = p2.out; p1.head = p2.head; p1.anchor = p2.anchor; } /** * @param {import('#server').Payload} payload * @param {string} tag * @param {() => void} attributes_fn * @param {() => void} children_fn * @returns {void} */ export function element(payload, tag, attributes_fn, children_fn) { payload.out += `<${tag} `; attributes_fn(); payload.out += `>`; if (!VoidElements.has(tag)) { children_fn(); if (!RawTextElements.includes(tag)) { payload.out += BLOCK_ANCHOR; } payload.out += `</${tag}>`; } } /** * Array of `onDestroy` callbacks that should be called at the end of the server render function * @type {Function[]} */ export let on_destroy = []; /** * Only available on the server and when compiling with the `server` option. * Takes a component and returns an object with `body` and `head` properties on it, which you can use to populate the HTML when server-rendering your app. * @template {Record<string, any>} Props * @param {import('svelte').Component<Props> | import('svelte').ComponentType<import('svelte').SvelteComponent<Props>>} component * @param {{ props: Omit<Props, '$$slots' | '$$events'>; context?: Map<any, any> }} options * @returns {import('#server').RenderOutput} */ export function render(component, options) { const payload = create_payload(); const prev_on_destroy = on_destroy; on_destroy = []; payload.out += BLOCK_OPEN; if (options.context) { push(); /** @type {import('#server').Component} */ (current_component).c = options.context; } // @ts-expect-error component(payload, options.props, {}, {}); if (options.context) { pop(); } payload.out += BLOCK_CLOSE; for (const cleanup of on_destroy) cleanup(); on_destroy = prev_on_destroy; return { head: payload.head.out || payload.head.title ? payload.head.out + payload.head.title : '', html: payload.out, body: payload.out }; } /** * @param {import('#server').Payload} payload * @param {(head_payload: import('#server').Payload['head']) => void} fn * @returns {void} */ export function head(payload, fn) { const head_payload = payload.head; payload.head.out += BLOCK_OPEN; fn(head_payload); payload.head.out += BLOCK_CLOSE; } /** * @template V * @param {string} name * @param {V} value * @param {boolean} [is_boolean] * @returns {string} */ export function attr(name, value, is_boolean = false) { if (value == null || (!value && is_boolean) || (value === '' && name === 'class')) return ''; const assignment = is_boolean ? '' : `="${escape_html(value, true)}"`; return ` ${name}${assignment}`; } /** * @param {import('#server').Payload} payload * @param {boolean} is_html * @param {Record<string, string>} props * @param {() => void} component * @returns {void} */ export function css_props(payload, is_html, props, component) { const styles = style_object_to_string(props); if (is_html) { payload.out += `<div style="display: contents; ${styles}">`; } else { payload.out += `<g style="${styles}">`; } component(); if (is_html) { payload.out += `<!----></div>`; } else { payload.out += `<!----></g>`; } } /** * @param {Record<string, unknown>} attrs * @param {Record<string, string>} [classes] * @param {Record<string, string>} [styles] * @param {number} [flags] * @returns {string} */ export function spread_attributes(attrs, classes, styles, flags = 0) { if (styles) { attrs.style = attrs.style ? style_object_to_string(merge_styles(/** @type {string} */ (attrs.style), styles)) : style_object_to_string(styles); } if (classes) { const classlist = attrs.class ? [attrs.class] : []; for (const key in classes) { if (classes[key]) { classlist.push(key); } } attrs.class = classlist.join(' '); } let attr_str = ''; let name; const is_html = (flags & ELEMENT_IS_NAMESPACED) === 0; const lowercase = (flags & ELEMENT_PRESERVE_ATTRIBUTE_CASE) === 0; for (name in attrs) { // omit functions, internal svelte properties and invalid attribute names if (typeof attrs[name] === 'function') continue; if (name[0] === '$' && name[1] === '$') continue; // faster than name.startsWith('$$') if (INVALID_ATTR_NAME_CHAR_REGEX.test(name)) continue; if (lowercase) { name = name.toLowerCase(); } const is_boolean = is_html && DOMBooleanAttributes.includes(name); attr_str += attr(name, attrs[name], is_boolean); } return attr_str; } /** * @param {Record<string, unknown>[]} props * @returns {Record<string, unknown>} */ export function spread_props(props) { /** @type {Record<string, unknown>} */ const merged_props = {}; let key; for (let i = 0; i < props.length; i++) { const obj = props[i]; for (key in obj) { merged_props[key] = obj[key]; } } return merged_props; } /** * @param {unknown} value * @returns {string} */ export function stringify(value) { return typeof value === 'string' ? value : value == null ? '' : value + ''; } /** @param {Record<string, string>} style_object */ function style_object_to_string(style_object) { return Object.keys(style_object) .filter(/** @param {any} key */ (key) => style_object[key] != null && style_object[key] !== '') .map(/** @param {any} key */ (key) => `${key}: ${escape_html(style_object[key], true)};`) .join(' '); } /** @param {Record<string, string>} style_object */ export function add_styles(style_object) { const styles = style_object_to_string(style_object); return styles ? ` style="${styles}"` : ''; } /** * @param {string} attribute * @param {Record<string, string>} styles */ export function merge_styles(attribute, styles) { /** @type {Record<string, string>} */ var merged = {}; if (attribute) { for (var declaration of attribute.split(';')) { var i = declaration.indexOf(':'); var name = declaration.slice(0, i).trim(); var value = declaration.slice(i + 1).trim(); if (name !== '') merged[name] = value; } } for (name in styles) { merged[name] = styles[name]; } return merged; } /** * @template V * @param {Record<string, [any, any, any]>} store_values * @param {string} store_name * @param {import('#shared').Store<V> | null | undefined} store * @returns {V} */ export function store_get(store_values, store_name, store) { if (DEV) { validate_store(store, store_name.slice(1)); } // it could be that someone eagerly updates the store in the instance script, so // we should only reuse the store value in the template if (store_name in store_values && store_values[store_name][0] === store) { return store_values[store_name][2]; } store_values[store_name]?.[1](); // if store was switched, unsubscribe from old store store_values[store_name] = [store, null, undefined]; const unsub = subscribe_to_store( store, /** @param {any} v */ (v) => (store_values[store_name][2] = v) ); store_values[store_name][1] = unsub; return store_values[store_name][2]; } /** * Sets the new value of a store and returns that value. * @template V * @param {import('#shared').Store<V>} store * @param {V} value * @returns {V} */ export function store_set(store, value) { store.set(value); return value; } /** * Updates a store with a new value. * @template V * @param {Record<string, [any, any, any]>} store_values * @param {string} store_name * @param {import('#shared').Store<V>} store * @param {any} expression */ export function mutate_store(store_values, store_name, store, expression) { store_set(store, store_get(store_values, store_name, store)); return expression; } /** * @param {Record<string, [any, any, any]>} store_values * @param {string} store_name * @param {import('#shared').Store<number>} store * @param {1 | -1} [d] * @returns {number} */ export function update_store(store_values, store_name, store, d = 1) { let store_value = store_get(store_values, store_name, store); store.set(store_value + d); return store_value; } /** * @param {Record<string, [any, any, any]>} store_values * @param {string} store_name * @param {import('#shared').Store<number>} store * @param {1 | -1} [d] * @returns {number} */ export function update_store_pre(store_values, store_name, store, d = 1) { const value = store_get(store_values, store_name, store) + d; store.set(value); return value; } /** @param {Record<string, [any, any, any]>} store_values */ export function unsubscribe_stores(store_values) { for (const store_name in store_values) { store_values[store_name][1](); } } /** * @template V * @param {V} value * @param {() => V} fallback lazy because could contain side effects * @returns {V} */ export function value_or_fallback(value, fallback) { return value === undefined ? fallback() : value; } /** * @template V * @param {V} value * @param {() => Promise<V>} fallback lazy because could contain side effects * @returns {Promise<V>} */ export async function value_or_fallback_async(value, fallback) { return value === undefined ? fallback() : value; } /** * @param {import('#server').Payload} payload * @param {void | ((payload: import('#server').Payload, props: Record<string, unknown>) => void)} slot_fn * @param {Record<string, unknown>} slot_props * @param {null | (() => void)} fallback_fn * @returns {void} */ export function slot(payload, slot_fn, slot_props, fallback_fn) { if (slot_fn === undefined) { if (fallback_fn !== null) { fallback_fn(); } } else { slot_fn(payload, slot_props); } } /** * @param {Record<string, unknown>} props * @param {string[]} rest * @returns {Record<string, unknown>} */ export function rest_props(props, rest) { /** @type {Record<string, unknown>} */ const rest_props = {}; let key; for (key in props) { if (!rest.includes(key)) { rest_props[key] = props[key]; } } return rest_props; } /** * @param {Record<string, unknown>} props * @returns {Record<string, unknown>} */ export function sanitize_props(props) { const { children, $$slots, ...sanitized } = props; return sanitized; } /** * @param {Record<string, any>} props * @returns {Record<string, any>} */ export function sanitize_slots(props) { const sanitized = { ...props.$$slots }; if (props.children) sanitized.default = props.children; return sanitized; } /** * Legacy mode: If the prop has a fallback and is bound in the * parent component, propagate the fallback value upwards. * @param {Record<string, unknown>} props_parent * @param {Record<string, unknown>} props_now */ export function bind_props(props_parent, props_now) { for (const key in props_now) { const initial_value = props_parent[key]; const value = props_now[key]; if ( initial_value === undefined && value !== undefined && Object.getOwnPropertyDescriptor(props_parent, key)?.set ) { props_parent[key] = value; } } } /** * @template V * @param {Promise<V>} promise * @param {null | (() => void)} pending_fn * @param {(value: V) => void} then_fn * @returns {void} */ function await_block(promise, pending_fn, then_fn) { if (is_promise(promise)) { promise.then(null, noop); if (pending_fn !== null) { pending_fn(); } } else if (then_fn !== null) { then_fn(promise); } } export { await_block as await }; /** @param {any} array_like_or_iterator */ export function ensure_array_like(array_like_or_iterator) { return array_like_or_iterator?.length !== undefined ? array_like_or_iterator : Array.from(array_like_or_iterator); } /** * @param {any[]} args * @param {Function} [inspect] */ // eslint-disable-next-line no-console export function inspect(args, inspect = console.log) { inspect('init', ...args); } /** * @template V * @param {() => V} get_value */ export function once(get_value) { let value = /** @type {V} */ (UNINITIALIZED); return () => { if (value === UNINITIALIZED) { value = get_value(); } return value; }; } export { push, pop } from './context.js'; export { push_element, pop_element } from './dev.js'; export { add_snippet_symbol, validate_component, validate_dynamic_element_tag, validate_snippet, validate_void_dynamic_element } from '../shared/validate.js'; export { escape_html as escape }; export { default_slot } from '../client/dom/legacy/misc.js'; |