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import {
render as preactRender,
hydrate as preactHydrate,
options,
toChildArray,
Component
} from 'preact';
import {
useCallback,
useContext,
useDebugValue,
useEffect,
useId,
useImperativeHandle,
useLayoutEffect,
useMemo,
useReducer,
useRef,
useState
} from 'preact/hooks';
import {
useDeferredValue,
useInsertionEffect,
useSyncExternalStore,
useTransition
} from './index';
import { assign, IS_NON_DIMENSIONAL } from './util';
export const REACT_ELEMENT_TYPE = Symbol.for('react.element');
const CAMEL_PROPS =
/^(?:accent|alignment|arabic|baseline|cap|clip(?!PathU)|color|dominant|fill|flood|font|glyph(?!R)|horiz|image(!S)|letter|lighting|marker(?!H|W|U)|overline|paint|pointer|shape|stop|strikethrough|stroke|text(?!L)|transform|underline|unicode|units|v|vector|vert|word|writing|x(?!C))[A-Z]/;
const CAMEL_REPLACE = /[A-Z0-9]/g;
const IS_DOM = typeof document !== 'undefined';
// Input types for which onchange should not be converted to oninput.
const onChangeInputType = type => /fil|che|rad/.test(type);
// Some libraries like `react-virtualized` explicitly check for this.
Component.prototype.isReactComponent = true;
// `UNSAFE_*` lifecycle hooks
// Preact only ever invokes the unprefixed methods.
// Here we provide a base "fallback" implementation that calls any defined UNSAFE_ prefixed method.
// - If a component defines its own `componentDidMount()` (including via defineProperty), use that.
// - If a component defines `UNSAFE_componentDidMount()`, `componentDidMount` is the alias getter/setter.
// - If anything assigns to an `UNSAFE_*` property, the assignment is forwarded to the unprefixed property.
// See https://github.com/preactjs/preact/issues/1941
[
'componentWillMount',
'componentWillReceiveProps',
'componentWillUpdate'
].forEach(key => {
Object.defineProperty(Component.prototype, key, {
configurable: true,
get() {
return this['UNSAFE_' + key];
},
set(v) {
Object.defineProperty(this, key, {
configurable: true,
writable: true,
value: v
});
}
});
});
/**
* Proxy render() since React returns a Component reference.
* @param {import('./internal').VNode} vnode VNode tree to render
* @param {import('./internal').PreactElement} parent DOM node to render vnode tree into
* @param {() => void} [callback] Optional callback that will be called after rendering
* @returns {import('./internal').Component | null} The root component reference or null
*/
export function render(vnode, parent, callback) {
// React destroys any existing DOM nodes, see #1727
// ...but only on the first render, see #1828
if (parent._children == null) {
parent.textContent = '';
}
preactRender(vnode, parent);
if (typeof callback == 'function') callback();
return vnode ? vnode._component : null;
}
export function hydrate(vnode, parent, callback) {
preactHydrate(vnode, parent);
if (typeof callback == 'function') callback();
return vnode ? vnode._component : null;
}
let oldEventHook = options.event;
options.event = e => {
if (oldEventHook) e = oldEventHook(e);
e.persist = () => {};
e.isPropagationStopped = function isPropagationStopped() {
return this.cancelBubble;
};
e.isDefaultPrevented = function isDefaultPrevented() {
return this.defaultPrevented;
};
return (e.nativeEvent = e);
};
const classNameDescriptorNonEnumberable = {
configurable: true,
get() {
return this.class;
}
};
function handleDomVNode(vnode) {
let props = vnode.props,
type = vnode.type,
normalizedProps = {},
isNonDashedType = type.indexOf('-') == -1;
for (let i in props) {
let value = props[i];
if (
(i === 'value' && 'defaultValue' in props && value == null) ||
// Emulate React's behavior of not rendering the contents of noscript tags on the client.
(IS_DOM && i === 'children' && type === 'noscript') ||
i === 'class' ||
i === 'className'
) {
// Skip applying value if it is null/undefined and we already set
// a default value
continue;
}
if (i === 'style' && typeof value === 'object') {
for (let key in value) {
if (typeof value[key] === 'number' && !IS_NON_DIMENSIONAL.test(key)) {
value[key] += 'px';
}
}
} else if (
i === 'defaultValue' &&
'value' in props &&
props.value == null
) {
// `defaultValue` is treated as a fallback `value` when a value prop is present but null/undefined.
// `defaultValue` for Elements with no value prop is the same as the DOM defaultValue property.
i = 'value';
} else if (i === 'download' && value === true) {
// Calling `setAttribute` with a truthy value will lead to it being
// passed as a stringified value, e.g. `download="true"`. React
// converts it to an empty string instead, otherwise the attribute
// value will be used as the file name and the file will be called
// "true" upon downloading it.
value = '';
} else if (i === 'translate' && value === 'no') {
value = false;
} else if (i[0] === 'o' && i[1] === 'n') {
let lowerCased = i.toLowerCase();
if (lowerCased === 'ondoubleclick') {
i = 'ondblclick';
} else if (
lowerCased === 'onchange' &&
(type === 'input' || type === 'textarea') &&
!onChangeInputType(props.type)
) {
lowerCased = i = 'oninput';
} else if (lowerCased === 'onfocus') {
i = 'onfocusin';
} else if (lowerCased === 'onblur') {
i = 'onfocusout';
}
// Add support for onInput and onChange, see #3561
// if we have an oninput prop already change it to oninputCapture
if (lowerCased === 'oninput') {
i = lowerCased;
if (normalizedProps[i]) {
i = 'oninputCapture';
}
}
} else if (isNonDashedType && CAMEL_PROPS.test(i)) {
i = i.replace(CAMEL_REPLACE, '-$&').toLowerCase();
} else if (value === null) {
value = undefined;
}
normalizedProps[i] = value;
}
if (type == 'select') {
// Add support for array select values: <select multiple value={[]} />
if (normalizedProps.multiple && Array.isArray(normalizedProps.value)) {
// forEach() always returns undefined, which we abuse here to unset the value prop.
normalizedProps.value = toChildArray(props.children).forEach(child => {
child.props.selected =
normalizedProps.value.indexOf(child.props.value) != -1;
});
}
// Adding support for defaultValue in select tag
if (normalizedProps.defaultValue != null) {
normalizedProps.value = toChildArray(props.children).forEach(child => {
if (normalizedProps.multiple) {
child.props.selected =
normalizedProps.defaultValue.indexOf(child.props.value) != -1;
} else {
child.props.selected =
normalizedProps.defaultValue == child.props.value;
}
});
}
}
if (props.class && !props.className) {
normalizedProps.class = props.class;
Object.defineProperty(
normalizedProps,
'className',
classNameDescriptorNonEnumberable
);
} else if (props.className) {
normalizedProps.class = normalizedProps.className = props.className;
}
vnode.props = normalizedProps;
}
let oldVNodeHook = options.vnode;
options.vnode = vnode => {
// only normalize props on Element nodes
if (typeof vnode.type === 'string') {
handleDomVNode(vnode);
} else if (typeof vnode.type === 'function') {
const shouldApplyRef =
'prototype' in vnode.type && vnode.type.prototype.render;
if ('ref' in vnode.props && shouldApplyRef) {
vnode.ref = vnode.props.ref;
delete vnode.props.ref;
}
if (vnode.type.defaultProps) {
let normalizedProps = assign({}, vnode.props);
for (let i in vnode.type.defaultProps) {
if (normalizedProps[i] === undefined) {
normalizedProps[i] = vnode.type.defaultProps[i];
}
}
vnode.props = normalizedProps;
}
}
vnode.$$typeof = REACT_ELEMENT_TYPE;
if (oldVNodeHook) oldVNodeHook(vnode);
};
// Only needed for react-relay
let currentComponent;
const oldBeforeRender = options._render;
options._render = function (vnode) {
if (oldBeforeRender) {
oldBeforeRender(vnode);
}
currentComponent = vnode._component;
};
const oldDiffed = options.diffed;
/** @type {(vnode: import('./internal').VNode) => void} */
options.diffed = function (vnode) {
if (oldDiffed) {
oldDiffed(vnode);
}
const props = vnode.props;
const dom = vnode._dom;
if (
dom != null &&
vnode.type === 'textarea' &&
'value' in props &&
props.value !== dom.value
) {
dom.value = props.value == null ? '' : props.value;
}
currentComponent = null;
};
// This is a very very private internal function for React it
// is used to sort-of do runtime dependency injection.
export const __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED = {
ReactCurrentDispatcher: {
current: {
readContext(context) {
return currentComponent._globalContext[context._id].props.value;
},
useCallback,
useContext,
useDebugValue,
useDeferredValue,
useEffect,
useId,
useImperativeHandle,
useInsertionEffect,
useLayoutEffect,
useMemo,
// useMutableSource, // experimental-only and replaced by uSES, likely not worth supporting
useReducer,
useRef,
useState,
useSyncExternalStore,
useTransition
}
}
};