fix: handle forward-delete properly in the amount text input

src/components/AmountTextInput.js

@@ -26,12 +26,16 @@ const propTypes = {
 
     /** Function to call when selection in text input is changed */
     onSelectionChange: PropTypes.func,
+
+    /** Function to call to handle key presses in the text input */
+    onKeyPress: PropTypes.func,
 };
 
 const defaultProps = {
     forwardedRef: undefined,
     selection: undefined,
     onSelectionChange: () => {},
+    onKeyPress: () => {},
 };
 
 function AmountTextInput(props) {
@@ -51,6 +55,7 @@ function AmountTextInput(props) {
             selection={props.selection}
             onSelectionChange={props.onSelectionChange}
             accessibilityRole={CONST.ACCESSIBILITY_ROLE.TEXT}
+            onKeyPress={props.onKeyPress}
         />
     );
 }

src/components/TextInputWithCurrencySymbol/BaseTextInputWithCurrencySymbol.js

@@ -0,0 +1,72 @@
+import React from 'react';
+import AmountTextInput from '../AmountTextInput';
+import CurrencySymbolButton from '../CurrencySymbolButton';
+import * as CurrencyUtils from '../../libs/CurrencyUtils';
+import useLocalize from '../../hooks/useLocalize';
+import * as MoneyRequestUtils from '../../libs/MoneyRequestUtils';
+import * as textInputWithCurrencySymbolPropTypes from './textInputWithCurrencySymbolPropTypes';
+
+function BaseTextInputWithCurrencySymbol(props) {
+    const {fromLocaleDigit} = useLocalize();
+    const currencySymbol = CurrencyUtils.getLocalizedCurrencySymbol(props.selectedCurrencyCode);
+    const isCurrencySymbolLTR = CurrencyUtils.isCurrencySymbolLTR(props.selectedCurrencyCode);
+
+    const currencySymbolButton = (
+        <CurrencySymbolButton
+            currencySymbol={currencySymbol}
+            onCurrencyButtonPress={props.onCurrencyButtonPress}
+        />
+    );
+
+    /**
+     * Set a new amount value properly formatted
+     *
+     * @param {String} text - Changed text from user input
+     */
+    const setFormattedAmount = (text) => {
+        const newAmount = MoneyRequestUtils.addLeadingZero(MoneyRequestUtils.replaceAllDigits(text, fromLocaleDigit));
+        props.onChangeAmount(newAmount);
+    };
+
+    const amountTextInput = (
+        <AmountTextInput
+            formattedAmount={props.formattedAmount}
+            onChangeAmount={setFormattedAmount}
+            placeholder={props.placeholder}
+            ref={props.forwardedRef}
+            selection={props.selection}
+            onSelectionChange={(e) => {
+                props.onSelectionChange(e);
+            }}
+            onKeyPress={props.onKeyPress}
+        />
+    );
+
+    if (isCurrencySymbolLTR) {
+        return (
+            <>
+                {currencySymbolButton}
+                {amountTextInput}
+            </>
+        );
+    }
+
+    return (
+        <>
+            {amountTextInput}
+            {currencySymbolButton}
+        </>
+    );
+}
+
+BaseTextInputWithCurrencySymbol.propTypes = textInputWithCurrencySymbolPropTypes.propTypes;
+BaseTextInputWithCurrencySymbol.defaultProps = textInputWithCurrencySymbolPropTypes.defaultProps;
+BaseTextInputWithCurrencySymbol.displayName = 'BaseTextInputWithCurrencySymbol';
+
+export default React.forwardRef((props, ref) => (
+    <BaseTextInputWithCurrencySymbol
+        // eslint-disable-next-line react/jsx-props-no-spreading
+        {...props}
+        forwardedRef={ref}
+    />
+));

src/components/TextInputWithCurrencySymbol/index.android.js

@@ -0,0 +1,37 @@
+import React, {useState, useEffect} from 'react';
+import BaseTextInputWithCurrencySymbol from './BaseTextInputWithCurrencySymbol';
+import * as textInputWithCurrencySymbolPropTypes from './textInputWithCurrencySymbolPropTypes';
+
+function TextInputWithCurrencySymbol(props) {
+    const [skipNextSelectionChange, setSkipNextSelectionChange] = useState(false);
+
+    useEffect(() => {
+        setSkipNextSelectionChange(true);
+    }, [props.formattedAmount]);
+
+    return (
+        <BaseTextInputWithCurrencySymbol
+            // eslint-disable-next-line react/jsx-props-no-spreading
+            {...props}
+            onSelectionChange={(e) => {
+                if (skipNextSelectionChange) {
+                    setSkipNextSelectionChange(false);
+                    return;
+                }
+                props.onSelectionChange(e);
+            }}
+        />
+    );
+}
+
+TextInputWithCurrencySymbol.propTypes = textInputWithCurrencySymbolPropTypes.propTypes;
+TextInputWithCurrencySymbol.defaultProps = textInputWithCurrencySymbolPropTypes.defaultProps;
+TextInputWithCurrencySymbol.displayName = 'TextInputWithCurrencySymbol';
+
+export default React.forwardRef((props, ref) => (
+    <TextInputWithCurrencySymbol
+        // eslint-disable-next-line react/jsx-props-no-spreading
+        {...props}
+        forwardedRef={ref}
+    />
+));

src/components/TextInputWithCurrencySymbol/index.js

@@ -0,0 +1,24 @@
+import React from 'react';
+import BaseTextInputWithCurrencySymbol from './BaseTextInputWithCurrencySymbol';
+import * as textInputWithCurrencySymbolPropTypes from './textInputWithCurrencySymbolPropTypes';
+
+function TextInputWithCurrencySymbol(props) {
+    return (
+        <BaseTextInputWithCurrencySymbol
+            // eslint-disable-next-line react/jsx-props-no-spreading
+            {...props}
+        />
+    );
+}
+
+TextInputWithCurrencySymbol.propTypes = textInputWithCurrencySymbolPropTypes.propTypes;
+TextInputWithCurrencySymbol.defaultProps = textInputWithCurrencySymbolPropTypes.defaultProps;
+TextInputWithCurrencySymbol.displayName = 'TextInputWithCurrencySymbol';
+
+export default React.forwardRef((props, ref) => (
+    <TextInputWithCurrencySymbol
+        // eslint-disable-next-line react/jsx-props-no-spreading
+        {...props}
+        forwardedRef={ref}
+    />
+));

src/components/TextInputWithCurrencySymbol/textInputWithCurrencySymbolPropTypes.js

@@ -0,0 +1,45 @@
+import PropTypes from 'prop-types';
+import refPropTypes from '../refPropTypes';
+
+const propTypes = {
+    /** A ref to forward to amount text input */
+    forwardedRef: refPropTypes,
+
+    /** Formatted amount in local currency  */
+    formattedAmount: PropTypes.string.isRequired,
+
+    /** Function to call when amount in text input is changed */
+    onChangeAmount: PropTypes.func,
+
+    /** Function to call when currency button is pressed */
+    onCurrencyButtonPress: PropTypes.func,
+
+    /** Placeholder value for amount text input */
+    placeholder: PropTypes.string.isRequired,
+
+    /** Currency code of user's selected currency */
+    selectedCurrencyCode: PropTypes.string.isRequired,
+
+    /** Selection Object */
+    selection: PropTypes.shape({
+        start: PropTypes.number,
+        end: PropTypes.number,
+    }),
+
+    /** Function to call when selection in text input is changed */
+    onSelectionChange: PropTypes.func,
+
+    /** Function to call to handle key presses in the text input */
+    onKeyPress: PropTypes.func,
+};
+
+const defaultProps = {
+    forwardedRef: undefined,
+    onChangeAmount: () => {},
+    onCurrencyButtonPress: () => {},
+    selection: undefined,
+    onSelectionChange: () => {},
+    onKeyPress: () => {},
+};
+
+export {propTypes, defaultProps};

src/pages/iou/steps/MoneyRequestAmountForm.js

@@ -13,6 +13,8 @@ import TextInputWithCurrencySymbol from '../../../components/TextInputWithCurren
 import useLocalize from '../../../hooks/useLocalize';
 import CONST from '../../../CONST';
 import refPropTypes from '../../../components/refPropTypes';
+import getOperatingSystem from '../../../libs/getOperatingSystem';
+import * as Browser from '../../../libs/Browser';
 import useWindowDimensions from '../../../hooks/useWindowDimensions';
 
 const propTypes = {
@@ -75,6 +77,8 @@ function MoneyRequestAmountForm({amount, currency, isEditing, forwardedRef, onCu
         end: selectedAmountAsString.length,
     });
 
+    const forwardDeletePressedRef = useRef(false);
+
     /**
      * Event occurs when a user presses a mouse button over an DOM element.
      *
@@ -125,7 +129,8 @@ function MoneyRequestAmountForm({amount, currency, isEditing, forwardedRef, onCu
         }
         setCurrentAmount((prevAmount) => {
             const strippedAmount = MoneyRequestUtils.stripCommaFromAmount(newAmountWithoutSpaces);
-            setSelection((prevSelection) => getNewSelection(prevSelection, prevAmount.length, strippedAmount.length));
+            const isForwardDelete = prevAmount.length > strippedAmount.length && forwardDeletePressedRef.current;
+            setSelection((prevSelection) => getNewSelection(prevSelection, isForwardDelete ? strippedAmount.length : prevAmount.length, strippedAmount.length));
             return strippedAmount;
         });
     };
@@ -175,6 +180,22 @@ function MoneyRequestAmountForm({amount, currency, isEditing, forwardedRef, onCu
         onSubmitButtonPress(currentAmount);
     }, [onSubmitButtonPress, currentAmount]);
 
+    /**
+     * Input handler to check for a forward-delete key (or keyboard shortcut) press.
+     */
+    const textInputKeyPress = ({nativeEvent}) => {
+        const key = nativeEvent.key.toLowerCase();
+        if (Browser.isMobileSafari() && key === CONST.PLATFORM_SPECIFIC_KEYS.CTRL.DEFAULT) {
+            // Optimistically anticipate forward-delete on iOS Safari (in cases where the Mac Accessiblity keyboard is being
+            // used for input). If the Control-D shortcut doesn't get sent, the ref will still be reset on the next key press.
+            forwardDeletePressedRef.current = true;
+            return;
+        }
+        // Control-D on Mac is a keyboard shortcut for forward-delete. See https://support.apple.com/en-us/HT201236 for Mac keyboard shortcuts.
+        // Also check for the keyboard shortcut on iOS in cases where a hardware keyboard may be connected to the device.
+        forwardDeletePressedRef.current = key === 'delete' || (_.contains([CONST.OS.MAC_OS, CONST.OS.IOS], getOperatingSystem()) && nativeEvent.ctrlKey && key === 'd');
+    };
+
     const formattedAmount = MoneyRequestUtils.replaceAllDigits(currentAmount, toLocaleDigit);
     const buttonText = isEditing ? translate('common.save') : translate('common.next');
 
@@ -207,6 +228,7 @@ function MoneyRequestAmountForm({amount, currency, isEditing, forwardedRef, onCu
                         }
                         setSelection(e.nativeEvent.selection);
                     }}
+                    onKeyPress={textInputKeyPress}
                 />
             </View>
             <View