85 lines
2.4 KiB
JavaScript
85 lines
2.4 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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var UIManager = require('NativeModules').UIManager;
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var findNodeHandle = require('findNodeHandle');
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if (!UIManager.setChildren) {
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/**
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* Index cache (used by setChildren())
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*/
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UIManager._cachedIndexArray = function(size) {
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var cachedResult = this._cachedIndexArray._cache[size];
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if (!cachedResult) {
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var arr = [];
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for (var i = 0; i < size; i++) {
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arr[i] = i;
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}
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this._cachedIndexArray._cache[size] = arr;
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return arr;
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} else {
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return cachedResult;
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}
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};
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UIManager._cachedIndexArray._cache = {};
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/**
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* Fallback setChildren() implementation for Android
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*/
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UIManager.setChildren = function(containerTag, createdTags) {
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var indexes = this._cachedIndexArray(createdTags.length);
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UIManager.manageChildren(containerTag, null, null, createdTags, indexes, null);
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};
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}
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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 | 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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module.exports = UIManager;
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