[docs] Create Pickers masked field recipe

docs/data/date-pickers/custom-field/custom-behavior/MaskedMaterialTextField.js

@@ -0,0 +1,164 @@
+import * as React from 'react';
+import dayjs from 'dayjs';
+import { useRifm } from 'rifm';
+import TextField from '@mui/material/TextField';
+import useControlled from '@mui/utils/useControlled';
+import { AdapterDayjs } from '@mui/x-date-pickers/AdapterDayjs';
+import { LocalizationProvider } from '@mui/x-date-pickers/LocalizationProvider';
+import { DatePicker } from '@mui/x-date-pickers/DatePicker';
+import { useSplitFieldProps, useParsedFormat } from '@mui/x-date-pickers/hooks';
+import { useValidation, validateDate } from '@mui/x-date-pickers/validation';
+
+const MASK_USER_INPUT_SYMBOL = '_';
+const ACCEPT_REGEX = /[\d]/gi;
+
+const staticDateWith2DigitTokens = dayjs('2019-11-21T11:30:00.000');
+const staticDateWith1DigitTokens = dayjs('2019-01-01T09:00:00.000');
+
+function getValueStrFromValue(value, format) {
+  if (value == null) {
+    return '';
+  }
+
+  return value.isValid() ? value.format(format) : '';
+}
+
+function MaskedField(props) {
+  const { slots, slotProps, ...other } = props;
+
+  const { forwardedProps, internalProps } = useSplitFieldProps(other, 'date');
+
+  const {
+    format,
+    value: valueProp,
+    defaultValue,
+    onChange,
+    timezone,
+    onError,
+  } = internalProps;
+
+  const [value, setValue] = useControlled({
+    controlled: valueProp,
+    default: defaultValue ?? null,
+    name: 'MaskedField',
+    state: 'value',
+  });
+
+  // Control the input text
+  const [inputValue, setInputValue] = React.useState(() =>
+    getValueStrFromValue(value, format),
+  );
+
+  React.useEffect(() => {
+    if (value && value.isValid()) {
+      const newDisplayDate = getValueStrFromValue(value, format);
+      setInputValue(newDisplayDate);
+    }
+  }, [format, value]);
+
+  const parsedFormat = useParsedFormat(internalProps);
+
+  const { hasValidationError, getValidationErrorForNewValue } = useValidation({
+    value,
+    timezone,
+    onError,
+    props: internalProps,
+    validator: validateDate,
+  });
+
+  const handleValueStrChange = (newValueStr) => {
+    setInputValue(newValueStr);
+
+    const newValue = dayjs(newValueStr, format);
+    setValue(newValue);
+
+    if (onChange) {
+      onChange(newValue, {
+        validationError: getValidationErrorForNewValue(newValue),
+      });
+    }
+  };
+
+  const rifmFormat = React.useMemo(() => {
+    const formattedDateWith1Digit = staticDateWith1DigitTokens.format(format);
+    const inferredFormatPatternWith1Digits = formattedDateWith1Digit.replace(
+      ACCEPT_REGEX,
+      MASK_USER_INPUT_SYMBOL,
+    );
+    const inferredFormatPatternWith2Digits = staticDateWith2DigitTokens
+      .format(format)
+      .replace(ACCEPT_REGEX, '_');
+
+    if (inferredFormatPatternWith1Digits !== inferredFormatPatternWith2Digits) {
+      throw new Error(
+        `Mask does not support numbers with variable length such as 'M'.`,
+      );
+    }
+
+    const maskToUse = inferredFormatPatternWith1Digits;
+
+    return function formatMaskedDate(valueToFormat) {
+      let outputCharIndex = 0;
+      return valueToFormat
+        .split('')
+        .map((character, characterIndex) => {
+          ACCEPT_REGEX.lastIndex = 0;
+
+          if (outputCharIndex > maskToUse.length - 1) {
+            return '';
+          }
+
+          const maskChar = maskToUse[outputCharIndex];
+          const nextMaskChar = maskToUse[outputCharIndex + 1];
+
+          const acceptedChar = ACCEPT_REGEX.test(character) ? character : '';
+          const formattedChar =
+            maskChar === MASK_USER_INPUT_SYMBOL
+              ? acceptedChar
+              : maskChar + acceptedChar;
+
+          outputCharIndex += formattedChar.length;
+
+          const isLastCharacter = characterIndex === valueToFormat.length - 1;
+          if (
+            isLastCharacter &&
+            nextMaskChar &&
+            nextMaskChar !== MASK_USER_INPUT_SYMBOL
+          ) {
+            // when cursor at the end of mask part (e.g. month) prerender next symbol "21" -> "21/"
+            return formattedChar ? formattedChar + nextMaskChar : '';
+          }
+
+          return formattedChar;
+        })
+        .join('');
+    };
+  }, [format]);
+
+  const rifmProps = useRifm({
+    value: inputValue,
+    onChange: handleValueStrChange,
+    format: rifmFormat,
+  });
+
+  return (
+    <TextField
+      placeholder={parsedFormat}
+      error={!!hasValidationError}
+      {...rifmProps}
+      {...forwardedProps}
+    />
+  );
+}
+
+function MaskedFieldDatePicker(props) {
+  return <DatePicker slots={{ ...props.slots, field: MaskedField }} {...props} />;
+}
+
+export default function MaskedMaterialTextField() {
+  return (
+    <LocalizationProvider dateAdapter={AdapterDayjs}>
+      <MaskedFieldDatePicker />
+    </LocalizationProvider>
+  );
+}

docs/data/date-pickers/custom-field/custom-behavior/MaskedMaterialTextField.tsx

@@ -0,0 +1,168 @@
+import * as React from 'react';
+import dayjs, { Dayjs } from 'dayjs';
+import { useRifm } from 'rifm';
+import TextField from '@mui/material/TextField';
+import useControlled from '@mui/utils/useControlled';
+import { AdapterDayjs } from '@mui/x-date-pickers/AdapterDayjs';
+import { LocalizationProvider } from '@mui/x-date-pickers/LocalizationProvider';
+import {
+  DatePicker,
+  DatePickerProps,
+  DatePickerFieldProps,
+} from '@mui/x-date-pickers/DatePicker';
+import { useSplitFieldProps, useParsedFormat } from '@mui/x-date-pickers/hooks';
+import { useValidation, validateDate } from '@mui/x-date-pickers/validation';
+
+const MASK_USER_INPUT_SYMBOL = '_';
+const ACCEPT_REGEX = /[\d]/gi;
+
+const staticDateWith2DigitTokens = dayjs('2019-11-21T11:30:00.000');
+const staticDateWith1DigitTokens = dayjs('2019-01-01T09:00:00.000');
+
+function getValueStrFromValue(value: Dayjs | null, format: string) {
+  if (value == null) {
+    return '';
+  }
+
+  return value.isValid() ? value.format(format) : '';
+}
+
+function MaskedField(props: DatePickerFieldProps<Dayjs>) {
+  const { slots, slotProps, ...other } = props;
+
+  const { forwardedProps, internalProps } = useSplitFieldProps(other, 'date');
+
+  const {
+    format,
+    value: valueProp,
+    defaultValue,
+    onChange,
+    timezone,
+    onError,
+  } = internalProps;
+
+  const [value, setValue] = useControlled({
+    controlled: valueProp,
+    default: defaultValue ?? null,
+    name: 'MaskedField',
+    state: 'value',
+  });
+
+  // Control the input text
+  const [inputValue, setInputValue] = React.useState<string>(() =>
+    getValueStrFromValue(value, format),
+  );
+
+  React.useEffect(() => {
+    if (value && value.isValid()) {
+      const newDisplayDate = getValueStrFromValue(value, format);
+      setInputValue(newDisplayDate);
+    }
+  }, [format, value]);
+
+  const parsedFormat = useParsedFormat(internalProps);
+
+  const { hasValidationError, getValidationErrorForNewValue } = useValidation({
+    value,
+    timezone,
+    onError,
+    props: internalProps,
+    validator: validateDate,
+  });
+
+  const handleValueStrChange = (newValueStr: string) => {
+    setInputValue(newValueStr);
+
+    const newValue = dayjs(newValueStr, format);
+    setValue(newValue);
+
+    if (onChange) {
+      onChange(newValue, {
+        validationError: getValidationErrorForNewValue(newValue),
+      });
+    }
+  };
+
+  const rifmFormat = React.useMemo(() => {
+    const formattedDateWith1Digit = staticDateWith1DigitTokens.format(format);
+    const inferredFormatPatternWith1Digits = formattedDateWith1Digit.replace(
+      ACCEPT_REGEX,
+      MASK_USER_INPUT_SYMBOL,
+    );
+    const inferredFormatPatternWith2Digits = staticDateWith2DigitTokens
+      .format(format)
+      .replace(ACCEPT_REGEX, '_');
+
+    if (inferredFormatPatternWith1Digits !== inferredFormatPatternWith2Digits) {
+      throw new Error(
+        `Mask does not support numbers with variable length such as 'M'.`,
+      );
+    }
+
+    const maskToUse = inferredFormatPatternWith1Digits;
+
+    return function formatMaskedDate(valueToFormat: string) {
+      let outputCharIndex = 0;
+      return valueToFormat
+        .split('')
+        .map((character, characterIndex) => {
+          ACCEPT_REGEX.lastIndex = 0;
+
+          if (outputCharIndex > maskToUse.length - 1) {
+            return '';
+          }
+
+          const maskChar = maskToUse[outputCharIndex];
+          const nextMaskChar = maskToUse[outputCharIndex + 1];
+
+          const acceptedChar = ACCEPT_REGEX.test(character) ? character : '';
+          const formattedChar =
+            maskChar === MASK_USER_INPUT_SYMBOL
+              ? acceptedChar
+              : maskChar + acceptedChar;
+
+          outputCharIndex += formattedChar.length;
+
+          const isLastCharacter = characterIndex === valueToFormat.length - 1;
+          if (
+            isLastCharacter &&
+            nextMaskChar &&
+            nextMaskChar !== MASK_USER_INPUT_SYMBOL
+          ) {
+            // when cursor at the end of mask part (e.g. month) prerender next symbol "21" -> "21/"
+            return formattedChar ? formattedChar + nextMaskChar : '';
+          }
+
+          return formattedChar;
+        })
+        .join('');
+    };
+  }, [format]);
+
+  const rifmProps = useRifm({
+    value: inputValue,
+    onChange: handleValueStrChange,
+    format: rifmFormat,
+  });
+
+  return (
+    <TextField
+      placeholder={parsedFormat}
+      error={!!hasValidationError}
+      {...rifmProps}
+      {...forwardedProps}
+    />
+  );
+}
+
+function MaskedFieldDatePicker(props: DatePickerProps<Dayjs>) {
+  return <DatePicker slots={{ ...props.slots, field: MaskedField }} {...props} />;
+}
+
+export default function MaskedMaterialTextField() {
+  return (
+    <LocalizationProvider dateAdapter={AdapterDayjs}>
+      <MaskedFieldDatePicker />
+    </LocalizationProvider>
+  );
+}

docs/data/date-pickers/custom-field/custom-behavior/MaskedMaterialTextField.tsx.preview

@@ -0,0 +1 @@
+<MaskedFieldDatePicker />

docs/data/date-pickers/custom-field/custom-field.md

@@ -132,6 +132,12 @@ you can replace the field with an `Autocomplete` listing those dates:
 
 {{"demo": "PickerWithAutocompleteField.js", "defaultCodeOpen": false}}
 
+### Using a masked Text Field
+
+If you want to use a simple mask approach for the field editing instead of the built-in logic, you can replace the default field with a Text Field using a masked input value built with the [rifm](https://github.com/realadvisor/rifm) package.
+
+{{"demo": "custom-behavior/MaskedMaterialTextField.js", "defaultCodeOpen": false}}
+
 ### Using a read-only `TextField`
 
 If you want users to select a value exclusively through the views

docs/package.json

@@ -91,6 +91,7 @@
     "react-runner": "^1.0.5",
     "react-simple-code-editor": "^0.14.1",
     "recast": "^0.23.9",
+    "rifm": "0.12.1",
     "rimraf": "^6.0.1",
     "rxjs": "^7.8.1",
     "styled-components": "^6.1.13",