108 lines
3.6 KiB
JavaScript
108 lines
3.6 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow strict-local
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* @format
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*/
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'use strict';
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const NativeModules = require('NativeModules');
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const Platform = require('Platform');
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const defineLazyObjectProperty = require('defineLazyObjectProperty');
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const invariant = require('fbjs/lib/invariant');
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const {UIManager} = NativeModules;
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invariant(
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UIManager,
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'UIManager is undefined. The native module config is probably incorrect.',
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);
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// In past versions of ReactNative users called UIManager.takeSnapshot()
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// However takeSnapshot was moved to ReactNative in order to support flat
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// bundles and to avoid a cyclic dependency between UIManager and ReactNative.
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// UIManager.takeSnapshot still exists though. In order to avoid confusion or
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// accidental usage, mask the method with a deprecation warning.
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UIManager.__takeSnapshot = UIManager.takeSnapshot;
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UIManager.takeSnapshot = function() {
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invariant(
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false,
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'UIManager.takeSnapshot should not be called directly. ' +
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'Use ReactNative.takeSnapshot instead.',
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);
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};
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/**
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* Copies the ViewManager constants and commands into UIManager. This is
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* only needed for iOS, which puts the constants in the ViewManager
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* namespace instead of UIManager, unlike Android.
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*/
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if (Platform.OS === 'ios') {
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Object.keys(UIManager).forEach(viewName => {
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const viewConfig = UIManager[viewName];
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if (viewConfig.Manager) {
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defineLazyObjectProperty(viewConfig, 'Constants', {
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get: () => {
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const viewManager = NativeModules[viewConfig.Manager];
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const constants = {};
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viewManager &&
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Object.keys(viewManager).forEach(key => {
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const value = viewManager[key];
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if (typeof value !== 'function') {
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constants[key] = value;
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}
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});
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return constants;
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},
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});
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defineLazyObjectProperty(viewConfig, 'Commands', {
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get: () => {
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const viewManager = NativeModules[viewConfig.Manager];
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const commands = {};
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let index = 0;
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viewManager &&
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Object.keys(viewManager).forEach(key => {
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const value = viewManager[key];
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if (typeof value === 'function') {
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commands[key] = index++;
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}
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});
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return commands;
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},
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});
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}
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});
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} else if (UIManager.ViewManagerNames) {
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// We want to add all the view managers to the UIManager.
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// However, the way things are set up, the list of view managers is not known at compile time.
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// As Prepack runs at compile it, it cannot process this loop.
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// So we wrap it in a special __residual call, which basically tells Prepack to ignore it.
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let residual = global.__residual
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? global.__residual
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: (_, f, ...args) => f.apply(undefined, args);
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residual(
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'void',
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(UIManager, defineLazyObjectProperty) => {
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UIManager.ViewManagerNames.forEach(viewManagerName => {
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defineLazyObjectProperty(UIManager, viewManagerName, {
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get: () => UIManager.getConstantsForViewManager(viewManagerName),
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});
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});
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},
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UIManager,
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defineLazyObjectProperty,
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);
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// As Prepack now no longer knows which properties exactly the UIManager has,
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// we also tell Prepack that it has only partial knowledge of the UIManager,
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// so that any accesses to unknown properties along the global code will fail
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// when Prepack encounters them.
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if (global.__makePartial) global.__makePartial(UIManager);
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}
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module.exports = UIManager;
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