TextFormField TextCapitalization.words not working when text is selected

[mregnauld]

Is there an existing issue for this?

• [X] I have searched the existing issues
• [X] I have read the guide to filing a bug

Steps to reproduce

On a Flutter app for Android or iOS:

1. Create a simple TextFormField as followed:

TextFormField(
  textCapitalization: TextCapitalization.words,
  textInputAction: TextInputAction.done,
),

2. Now when you run the app, in the TextFormField, enter the word: Example
3. Now select the last characters of that word, for example: ample
4. Type something, for example: pect

Expected results

Because I use textCapitalization: TextCapitalization.words, I expect to type pect, all in lowercase, because I started typing in the middle of the word.

Actual results

I actually type Pect, with the first character in uppercase and the virtual keyboard in uppercase mode for that character.

Code sample

Code sample

(Works only on Android / iOS) https://dartpad.dev/?id=e75b493dae1287757c5e1d77a0dc73f1

Screenshots or Video

Screenshots / Video demonstration

[Upload media here]

Logs

Logs

[Paste your logs here]

Flutter Doctor output

Doctor output

[✓] Flutter (Channel stable, 3.10.2, on macOS 13.2 22D49 darwin-arm64, locale fr-FR)
    • Flutter version 3.10.2 on channel stable at /Users/mregnauld/FlutterSDK/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 9cd3d0d9ff (7 days ago), 2023-05-23 20:57:28 -0700
    • Engine revision 90fa3ae28f
    • Dart version 3.0.2
    • DevTools version 2.23.1

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0-rc1)
    • Android SDK at /Users/mregnauld/AndroidSDK
    • Platform android-33, build-tools 33.0.0-rc1
    • ANDROID_HOME = /Users/mregnauld/AndroidSDK
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 14C18
    • CocoaPods version 1.11.3

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)

[✓] VS Code (version 1.77.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.60.0

[✓] Connected device (3 available)
    • iPhone de Matthieu (mobile) • 00008030-001C085222DA802E • ios            • iOS 16.2 20C65
    • macOS (desktop)             • macos                     • darwin-arm64   • macOS 13.2 22D49 darwin-arm64
    • Chrome (web)                • chrome                    • web-javascript • Google Chrome 113.0.5672.126

[✓] Network resources
    • All expected network resources are available.

• No issues found!

[huycozy]

Hi @mregnauld I checked this on my Android device but I can type pect as expected (in lowercase). Which device are you testing on? And what is the keyboard app you are using?

[mregnauld]

Hello @huycozy I got the problem with an iPhone 11 (iOS 16.2). I also tested on a Samsung device but I don't get the problem, it behaves as expected.

[huycozy]

Thanks, I can see the issue on iOS as well.

Android	iOS
✅	❌

✅: No Issue ❌: Issue reproduced

Demo video

https://github.com/flutter/flutter/assets/104349824/f9f17161-565b-46ad-a317-a18b323bcc4d

Also, I see there's an open issue (#99436) that is somewhat similar to this but the case looks a bit different (switching capitalization on runtime) and that issue is happening on both iOS and Android (I verified on Android as well). So I will label this issue as a separate issue.

flutter doctor -v (stable and master)

[✓] Flutter (Channel stable, 3.10.2, on macOS 13.0.1 22A400 darwin-x64, locale en-VN)
    • Flutter version 3.10.2 on channel stable at /Users/huynq/Documents/GitHub/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 9cd3d0d9ff (22 hours ago), 2023-05-23 20:57:28 -0700
    • Engine revision 90fa3ae28f
    • Dart version 3.0.2
    • DevTools version 2.23.1

[✓] Android toolchain - develop for Android devices (Android SDK version 32.0.0)
    • Android SDK at /Users/huynq/Library/Android/sdk
    • Platform android-33, build-tools 32.0.0
    • ANDROID_HOME = /Users/huynq/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 14E222b
    • CocoaPods version 1.11.3

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)

[✓] VS Code (version 1.78.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.64.0

[✓] Connected device (3 available)
    • RMX2001 (mobile) • EUYTFEUSQSRGDA6D • android-arm64  • Android 11 (API 30)
    • macOS (desktop)  • macos            • darwin-x64     • macOS 13.0.1 22A400 darwin-x64
    • Chrome (web)     • chrome           • web-javascript • Google Chrome 113.0.5672.126

[✓] Network resources
    • All expected network resources are available.

• No issues found!

[!] Flutter (Channel master, 3.11.0-16.0.pre.45, on macOS 13.0.1 22A400 darwin-x64, locale en-VN)
    • Flutter version 3.11.0-16.0.pre.45 on channel master at /Users/huynq/Documents/GitHub/flutter_master
    ! Warning: `flutter` on your path resolves to /Users/huynq/Documents/GitHub/flutter/bin/flutter, which is not inside your current Flutter SDK checkout at /Users/huynq/Documents/GitHub/flutter_master. Consider adding /Users/huynq/Documents/GitHub/flutter_master/bin to the front of your path.
    ! Warning: `dart` on your path resolves to /Users/huynq/Documents/GitHub/flutter/bin/dart, which is not inside your current Flutter SDK checkout at /Users/huynq/Documents/GitHub/flutter_master. Consider adding /Users/huynq/Documents/GitHub/flutter_master/bin to the front of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 3c61b9d834 (37 minutes ago), 2023-05-31 19:39:15 -0700
    • Engine revision f9bc342c84
    • Dart version 3.1.0 (build 3.1.0-155.0.dev)
    • DevTools version 2.23.1
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.

[✓] Android toolchain - develop for Android devices (Android SDK version 32.0.0)
    • Android SDK at /Users/huynq/Library/Android/sdk
    • Platform android-33, build-tools 32.0.0
    • ANDROID_HOME = /Users/huynq/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 14E222b
    • CocoaPods version 1.11.3

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)

[✓] VS Code (version 1.78.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.64.0

[✓] Connected device (5 available)
    • RMX2001 (mobile)       • EUYTFEUSQSRGDA6D                         • android-arm64  • Android 11 (API 30)
    • iPhone (mobile)        • d9a94afe2b649fef56ba0bfeb052f0f2a7dae95e • ios            • iOS 15.7.2 19H218
    • iPhone 14 Pro (mobile) • 98082851-A0C4-4E39-A310-21C48B10A364     • ios            • com.apple.CoreSimulator.SimRuntime.iOS-16-4 (simulator)
    • macOS (desktop)        • macos                                    • darwin-x64     • macOS 13.0.1 22A400 darwin-x64
    • Chrome (web)           • chrome                                   • web-javascript • Google Chrome 113.0.5672.126

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.

[mregnauld]

Yes, the problem is exactly what you show in the video.

[justinmc]

Confirmed that on native iOS, the behavior is as expected, so this is a bug.

CC @LongCatIsLooong from triage.

[gfb-47]

I still see this issue, anyone else?