Fix IOU amount input flicking

src/components/AmountTextInput.tsx

@@ -39,7 +39,7 @@ type AmountTextInputProps = {
 
     /** Hide the focus styles on TextInput */
     hideFocusedState?: boolean;
-} & Pick<BaseTextInputProps, 'autoFocus'>;
+} & Pick<BaseTextInputProps, 'autoFocus' | 'autoGrowExtraSpace'>;
 
 function AmountTextInput(
     {

src/components/MoneyRequestAmountInput.tsx

@@ -12,6 +12,7 @@ import CONST from '@src/CONST';
 import isTextInputFocused from './TextInput/BaseTextInput/isTextInputFocused';
 import type {BaseTextInputRef} from './TextInput/BaseTextInput/types';
 import TextInputWithCurrencySymbol from './TextInputWithCurrencySymbol';
+import type {TextInputWithCurrencySymbolProps} from './TextInputWithCurrencySymbol/types';
 
 type CurrentMoney = {amount: string; currency: string};
 
@@ -91,7 +92,7 @@ type MoneyRequestAmountInputProps = {
 
     /** The width of inner content */
     contentWidth?: number;
-};
+} & Pick<TextInputWithCurrencySymbolProps, 'autoGrowExtraSpace'>;
 
 type Selection = {
     start: number;
@@ -126,6 +127,7 @@ function MoneyRequestAmountInput(
         hideFocusedState = true,
         shouldKeepUserInput = false,
         autoGrow = true,
+        autoGrowExtraSpace,
         contentWidth,
         ...props
     }: MoneyRequestAmountInputProps,
@@ -289,6 +291,7 @@ function MoneyRequestAmountInput(
     return (
         <TextInputWithCurrencySymbol
             autoGrow={autoGrow}
+            autoGrowExtraSpace={autoGrowExtraSpace}
             disableKeyboard={disableKeyboard}
             formattedAmount={formattedAmount}
             onChangeAmount={setNewAmount}

src/components/TextInput/BaseTextInput/index.native.tsx

@@ -49,6 +49,7 @@ function BaseTextInput(
         autoFocus = false,
         disableKeyboard = false,
         autoGrow = false,
+        autoGrowExtraSpace = 0,
         autoGrowHeight = false,
         maxAutoGrowHeight,
         hideFocusedState = false,
@@ -258,7 +259,8 @@ function BaseTextInput(
     const newTextInputContainerStyles: StyleProp<ViewStyle> = StyleSheet.flatten([
         styles.textInputContainer,
         textInputContainerStyles,
-        (autoGrow || !!contentWidth) && StyleUtils.getWidthStyle(textInputWidth),
+        !!contentWidth && StyleUtils.getWidthStyle(textInputWidth),
+        autoGrow && StyleUtils.getAutoGrowWidthInputContainerStyles(textInputWidth, autoGrowExtraSpace),
         !hideFocusedState && isFocused && styles.borderColorFocus,
         (!!hasError || !!errorText) && styles.borderColorDanger,
         autoGrowHeight && {scrollPaddingTop: typeof maxAutoGrowHeight === 'number' ? 2 * maxAutoGrowHeight : undefined},
@@ -449,14 +451,10 @@ function BaseTextInput(
             )}
             {/*
                  Text input component doesn't support auto grow by default.
-                 We're using a hidden text input to achieve that.
                  This text view is used to calculate width or height of the input value given textStyle in this component.
                  This Text component is intentionally positioned out of the screen.
              */}
             {(!!autoGrow || autoGrowHeight) && !isAutoGrowHeightMarkdown && (
-                // Add +2 to width on Safari browsers so that text is not cut off due to the cursor or when changing the value
-                // https://github.com/Expensify/App/issues/8158
-                // https://github.com/Expensify/App/issues/26628
                 <Text
                     style={[
                         inputStyle,

src/components/TextInput/BaseTextInput/index.tsx

@@ -50,6 +50,7 @@ function BaseTextInput(
         autoFocus = false,
         disableKeyboard = false,
         autoGrow = false,
+        autoGrowExtraSpace = 0,
         autoGrowHeight = false,
         maxAutoGrowHeight,
         hideFocusedState = false,
@@ -257,7 +258,8 @@ function BaseTextInput(
     const newTextInputContainerStyles: StyleProp<ViewStyle> = StyleSheet.flatten([
         styles.textInputContainer,
         textInputContainerStyles,
-        (autoGrow || !!contentWidth) && StyleUtils.getWidthStyle(textInputWidth),
+        !!contentWidth && StyleUtils.getWidthStyle(textInputWidth),
+        autoGrow && StyleUtils.getAutoGrowWidthInputContainerStyles(textInputWidth, autoGrowExtraSpace),
         !hideFocusedState && isFocused && styles.borderColorFocus,
         (!!hasError || !!errorText) && styles.borderColorDanger,
         autoGrowHeight && {scrollPaddingTop: typeof maxAutoGrowHeight === 'number' ? 2 * maxAutoGrowHeight : undefined},
@@ -493,7 +495,6 @@ function BaseTextInput(
             )}
             {/*
                  Text input component doesn't support auto grow by default.
-                 We're using a hidden text input to achieve that.
                  This text view is used to calculate width or height of the input value given textStyle in this component.
                  This Text component is intentionally positioned out of the screen.
              */}

src/components/TextInput/BaseTextInput/types.ts

@@ -54,6 +54,9 @@ type CustomBaseTextInputProps = {
      */
     autoGrow?: boolean;
 
+    /** If autoGrow is enabled, this reserves extra space for incoming characters to prevent flickering. */
+    autoGrowExtraSpace?: number;
+
     /**
      * Autogrow input container height based on the entered text
      */

src/components/TextInputWithCurrencySymbol/types.ts

@@ -77,7 +77,7 @@ type BaseTextInputWithCurrencySymbolProps = {
 
     /** Hide the focus styles on TextInput */
     hideFocusedState?: boolean;
-} & Pick<BaseTextInputProps, 'autoFocus' | 'autoGrow' | 'contentWidth' | 'onPress'>;
+} & Pick<BaseTextInputProps, 'autoFocus' | 'autoGrow' | 'autoGrowExtraSpace' | 'contentWidth' | 'onPress'>;
 
 type TextInputWithCurrencySymbolProps = Omit<BaseTextInputWithCurrencySymbolProps, 'onSelectionChange'> & {
     onSelectionChange?: (start: number, end: number) => void;

src/pages/iou/MoneyRequestAmountForm.tsx

@@ -19,6 +19,7 @@ import * as CurrencyUtils from '@libs/CurrencyUtils';
 import * as DeviceCapabilities from '@libs/DeviceCapabilities';
 import * as MoneyRequestUtils from '@libs/MoneyRequestUtils';
 import Navigation from '@libs/Navigation/Navigation';
+import variables from '@styles/variables';
 import type {BaseTextInputRef} from '@src/components/TextInput/BaseTextInput/types';
 import CONST from '@src/CONST';
 import type {Route} from '@src/ROUTES';
@@ -259,6 +260,7 @@ function MoneyRequestAmountForm(
             >
                 <MoneyRequestAmountInput
                     amount={amount}
+                    autoGrowExtraSpace={variables.w80}
                     currency={currency}
                     isCurrencyPressable={isCurrencyPressable}
                     onCurrencyButtonPress={onCurrencyButtonPress}

src/styles/utils/index.ts

@@ -1290,6 +1290,13 @@ const createStyleUtils = (theme: ThemeColors, styles: ThemeStyles) => ({
         };
     },
 
+    getAutoGrowWidthInputContainerStyles: (width: number, extraSpace: number): ViewStyle => {
+        if (!!width && !!extraSpace) {
+            return {marginRight: -extraSpace, width: width + extraSpace};
+        }
+        return {width};
+    },
+
     /*
      * Returns the actual maxHeight of the auto-growing markdown text input.
      */