react-native/Libraries/Components/TextInput/TextInputState.js

77 lines
2.1 KiB
JavaScript

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule TextInputState
* @flow
*
* This class is responsible for coordinating the "focused"
* state for TextInputs. All calls relating to the keyboard
* should be funneled through here
*/
'use strict';
var Platform = require('Platform');
var UIManager = require('UIManager');
var TextInputState = {
/**
* Internal state
*/
_currentlyFocusedID: (null: ?number),
/**
* Returns the ID of the currently focused text field, if one exists
* If no text field is focused it returns null
*/
currentlyFocusedField: function(): ?number {
return this._currentlyFocusedID;
},
/**
* @param {number} TextInputID id of the text field to focus
* Focuses the specified text field
* noop if the text field was already focused
*/
focusTextInput: function(textFieldID: ?number) {
if (this._currentlyFocusedID !== textFieldID && textFieldID !== null) {
this._currentlyFocusedID = textFieldID;
if (Platform.OS === 'ios') {
UIManager.focus(textFieldID);
} else if (Platform.OS === 'android') {
UIManager.dispatchViewManagerCommand(
textFieldID,
UIManager.AndroidTextInput.Commands.focusTextInput,
null
);
}
}
},
/**
* @param {number} textFieldID id of the text field to focus
* Unfocuses the specified text field
* noop if it wasn't focused
*/
blurTextInput: function(textFieldID: ?number) {
if (this._currentlyFocusedID === textFieldID && textFieldID !== null) {
this._currentlyFocusedID = null;
if (Platform.OS === 'ios') {
UIManager.blur(textFieldID);
} else if (Platform.OS === 'android') {
UIManager.dispatchViewManagerCommand(
textFieldID,
UIManager.AndroidTextInput.Commands.blurTextInput,
null
);
}
}
}
};
module.exports = TextInputState;