106 lines
3.3 KiB
JavaScript
106 lines
3.3 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule UIManager
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* @flow
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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 findNodeHandle = require('react/lib/findNodeHandle');
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const invariant = require('fbjs/lib/invariant');
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const { UIManager } = NativeModules;
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invariant(UIManager, 'UIManager is undefined. The native module config is probably incorrect.');
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const _takeSnapshot = UIManager.takeSnapshot;
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/**
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* Capture an image of the screen, window or an individual view. The image
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* will be stored in a temporary file that will only exist for as long as the
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* app is running.
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*
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* The `view` argument can be the literal string `window` if you want to
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* capture the entire window, or it can be a reference to a specific
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* React Native component.
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*
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* The `options` argument may include:
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* - width/height (number) - the width and height of the image to capture.
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* - format (string) - either 'png' or 'jpeg'. Defaults to 'png'.
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* - quality (number) - the quality when using jpeg. 0.0 - 1.0 (default).
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*
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* Returns a Promise.
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* @platform ios
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*/
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UIManager.takeSnapshot = async function(
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view ?: 'window' | ReactElement<any> | number,
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options ?: {
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width ?: number,
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height ?: number,
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format ?: 'png' | 'jpeg',
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quality ?: number,
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},
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) {
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if (!_takeSnapshot) {
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console.warn('UIManager.takeSnapshot is not available on this platform');
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return;
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}
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if (typeof view !== 'number' && view !== 'window') {
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view = findNodeHandle(view) || 'window';
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}
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return _takeSnapshot(view, options);
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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 && 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 && 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 (Platform.OS === 'android' && UIManager.AndroidLazyViewManagersEnabled) {
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// TODO fill this out
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}
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module.exports = UIManager;
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