react-native/Libraries/Renderer/shims/ReactNativeViewConfigRegist...

108 lines
2.9 KiB
JavaScript

/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @format
* @flow strict-local
*/
'use strict';
import type {
ReactNativeBaseComponentViewConfig,
ViewConfigGetter,
} from './ReactNativeTypes';
const invariant = require('fbjs/lib/invariant');
// Event configs
const customBubblingEventTypes = {};
const customDirectEventTypes = {};
const eventTypes = {};
exports.customBubblingEventTypes = customBubblingEventTypes;
exports.customDirectEventTypes = customDirectEventTypes;
exports.eventTypes = eventTypes;
const viewConfigCallbacks = new Map();
const viewConfigs = new Map();
function processEventTypes(
viewConfig: ReactNativeBaseComponentViewConfig,
): void {
const {bubblingEventTypes, directEventTypes} = viewConfig;
if (__DEV__) {
if (bubblingEventTypes != null && directEventTypes != null) {
for (const topLevelType in directEventTypes) {
invariant(
bubblingEventTypes[topLevelType] == null,
'Event cannot be both direct and bubbling: %s',
topLevelType,
);
}
}
}
if (bubblingEventTypes != null) {
for (const topLevelType in bubblingEventTypes) {
if (customBubblingEventTypes[topLevelType] == null) {
eventTypes[topLevelType] = customBubblingEventTypes[topLevelType] =
bubblingEventTypes[topLevelType];
}
}
}
if (directEventTypes != null) {
for (const topLevelType in directEventTypes) {
if (customDirectEventTypes[topLevelType] == null) {
eventTypes[topLevelType] = customDirectEventTypes[topLevelType] =
directEventTypes[topLevelType];
}
}
}
}
/**
* Registers a native view/component by name.
* A callback is provided to load the view config from UIManager.
* The callback is deferred until the view is actually rendered.
* This is done to avoid causing Prepack deopts.
*/
exports.register = function(name: string, callback: ViewConfigGetter): string {
invariant(
!viewConfigCallbacks.has(name),
'Tried to register two views with the same name %s',
name,
);
viewConfigCallbacks.set(name, callback);
return name;
};
/**
* Retrieves a config for the specified view.
* If this is the first time the view has been used,
* This configuration will be lazy-loaded from UIManager.
*/
exports.get = function(name: string): ReactNativeBaseComponentViewConfig {
let viewConfig;
if (!viewConfigs.has(name)) {
const callback = viewConfigCallbacks.get(name);
invariant(
typeof callback === 'function',
'View config not found for name %s',
name,
);
viewConfigCallbacks.set(name, null);
viewConfig = callback();
processEventTypes(viewConfig);
viewConfigs.set(name, viewConfig);
} else {
viewConfig = viewConfigs.get(name);
}
invariant(viewConfig, 'View config not found for name %s', name);
return viewConfig;
};