92 lines
2.2 KiB
JavaScript
92 lines
2.2 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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*
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* This class is responsible for coordinating the "focused"
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* state for TextInputs. All calls relating to the keyboard
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* should be funneled through here
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*
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* @format
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* @flow strict-local
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*/
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'use strict';
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const Platform = require('Platform');
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const UIManager = require('UIManager');
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let currentlyFocusedID: ?number = null;
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const inputs = new Set();
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/**
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* Returns the ID of the currently focused text field, if one exists
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* If no text field is focused it returns null
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*/
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function currentlyFocusedField(): ?number {
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return currentlyFocusedID;
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}
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/**
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* @param {number} TextInputID id of the text field to focus
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* Focuses the specified text field
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* noop if the text field was already focused
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*/
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function focusTextInput(textFieldID: ?number) {
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if (currentlyFocusedID !== textFieldID && textFieldID !== null) {
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currentlyFocusedID = textFieldID;
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if (Platform.OS === 'ios') {
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UIManager.focus(textFieldID);
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} else if (Platform.OS === 'android') {
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UIManager.dispatchViewManagerCommand(
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textFieldID,
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UIManager.AndroidTextInput.Commands.focusTextInput,
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null,
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);
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}
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}
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}
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/**
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* @param {number} textFieldID id of the text field to unfocus
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* Unfocuses the specified text field
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* noop if it wasn't focused
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*/
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function blurTextInput(textFieldID: ?number) {
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if (currentlyFocusedID === textFieldID && textFieldID !== null) {
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currentlyFocusedID = null;
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if (Platform.OS === 'ios') {
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UIManager.blur(textFieldID);
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} else if (Platform.OS === 'android') {
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UIManager.dispatchViewManagerCommand(
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textFieldID,
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UIManager.AndroidTextInput.Commands.blurTextInput,
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null,
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);
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}
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}
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}
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function registerInput(textFieldID: number) {
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inputs.add(textFieldID);
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}
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function unregisterInput(textFieldID: number) {
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inputs.delete(textFieldID);
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}
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function isTextInput(textFieldID: number) {
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return inputs.has(textFieldID);
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}
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module.exports = {
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currentlyFocusedField,
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focusTextInput,
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blurTextInput,
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registerInput,
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unregisterInput,
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isTextInput,
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};
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