react-native/Libraries/BatchedBridge/BatchedBridgedModules/NativeModules.js

113 lines
3.5 KiB
JavaScript

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule NativeModules
* @flow
*/
'use strict';
const BatchedBridge = require('BatchedBridge');
const RemoteModules = BatchedBridge.RemoteModules;
function normalizePrefix(moduleName: string): string {
return moduleName.replace(/^(RCT|RK)/, '');
}
/**
* Dirty hack to support old (RK) and new (RCT) native module name conventions.
*/
Object.keys(RemoteModules).forEach((moduleName) => {
const strippedName = normalizePrefix(moduleName);
if (RemoteModules['RCT' + strippedName] && RemoteModules['RK' + strippedName]) {
throw new Error(
'Module cannot be registered as both RCT and RK: ' + moduleName
);
}
if (strippedName !== moduleName) {
RemoteModules[strippedName] = RemoteModules[moduleName];
delete RemoteModules[moduleName];
}
});
/**
* Define lazy getters for each module.
* These will return the module if already loaded, or load it if not.
*/
const NativeModules = {};
Object.keys(RemoteModules).forEach((moduleName) => {
Object.defineProperty(NativeModules, moduleName, {
enumerable: true,
get: () => {
let module = RemoteModules[moduleName];
if (module && typeof module.moduleID === 'number' && global.nativeRequireModuleConfig) {
const json = global.nativeRequireModuleConfig(moduleName);
const config = json && JSON.parse(json);
module = config && BatchedBridge.processModuleConfig(config, module.moduleID);
RemoteModules[moduleName] = module;
}
return module;
},
});
});
/**
* Copies the ViewManager constants and commands into UIManager. This is
* only needed for iOS, which puts the constants in the ViewManager
* namespace instead of UIManager, unlike Android.
*
* We'll eventually move this logic to UIManager.js, once all
* the call sites accessing NativeModules.UIManager directly have
* been removed #9344445
*/
const UIManager = NativeModules.UIManager;
UIManager && Object.keys(UIManager).forEach(viewName => {
const viewConfig = UIManager[viewName];
if (viewConfig.Manager) {
let constants;
/* $FlowFixMe - nice try. Flow doesn't like getters */
Object.defineProperty(viewConfig, 'Constants', {
enumerable: true,
get: () => {
if (constants) {
return constants;
}
constants = {};
const viewManager = NativeModules[normalizePrefix(viewConfig.Manager)];
viewManager && Object.keys(viewManager).forEach(key => {
const value = viewManager[key];
if (typeof value !== 'function') {
constants[key] = value;
}
});
return constants;
},
});
let commands;
/* $FlowFixMe - nice try. Flow doesn't like getters */
Object.defineProperty(viewConfig, 'Commands', {
enumerable: true,
get: () => {
if (commands) {
return commands;
}
commands = {};
const viewManager = NativeModules[normalizePrefix(viewConfig.Manager)];
viewManager && Object.keys(viewManager).forEach((key, index) => {
const value = viewManager[key];
if (typeof value === 'function') {
commands[key] = index;
}
});
return commands;
},
});
}
});
module.exports = NativeModules;