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https://github.com/facebook/react-native.git
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David Vacca
b28ddede7b
Summary: This diff adds a new variable called "DisplayMode" into SurfaceHandler.cpp and FacebookAppRouteHandler.js. The purpose of DisplayMode is for the native pre-render system to notify React that the a surface is either being "pre-rendered" or "rendered" When the surface is being "pre-rendered" (displayMode == "SUSPENDED"), react will create and commit React Trees, but it will not execute use-effect callbacks When the surface is being "rendered" (displayMode == "VISIBLE"), react will create and commit React Trees and it will not execute all use-effect callbacks that weren't executed during "pre-rendering" By default surfaces are going to be rendered with displayMode == "VISIBLE". This diff should not create any change of behavior for now, this is the infra required to integrate the new offScreen API the react team is working on for pre-rendering system changelog: [internal] internal Reviewed By: yungsters Differential Revision: D27614664 fbshipit-source-id: f1f42fdf174c2ffa74174feb1873f1d5d46e7a95
34 lines
818 B
JavaScript
34 lines
818 B
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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export opaque type DisplayModeType = number;
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/** DisplayMode should be in sync with the method displayModeToInt from
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* react/renderer/uimanager/primitives.h. */
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const DisplayMode: {[string]: DisplayModeType} = Object.freeze({
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VISIBLE: 1,
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SUSPENDED: 2,
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HIDDEN: 3,
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});
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export function coerceDisplayMode(value: ?number): DisplayModeType {
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if (value == null || value === undefined) {
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return DisplayMode.VISIBLE;
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}
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switch (value) {
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case DisplayMode.SUSPENDED:
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case DisplayMode.HIDDEN:
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return value;
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}
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return DisplayMode.VISIBLE;
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}
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export default DisplayMode;
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