Go-flutter: SelectableText is not working in go-flutter

[Tokenyet]

[√] Flutter (Channel unknown, v1.10.12, on Microsoft Windows [Version 10.0.18362.388], locale zh-TW)
[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[√] Android Studio (version 3.3)
[√] VS Code, 64-bit edition (version 1.38.1)
[!] Connected device
! No devices available

Steps to Reproduce

Just add a SelectableText with some text, and It's not copyable with ctrl+c. Maybe It's designed to use popup copy in mobile, but there is no function supported in desktop?

[pchampio]

I just spend a loot of time looking at SelectableText (https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/material/selectable_text.dart) and from my undersanding the flutter/flutter framework doesn't exposes the text selection value with the embedder (us: go-flutter, who handles ctrl-c)

[pchampio]

The SelectableText isn't sending message to the embedder because of this. (Commenting the return makes ctrl-c work but it is a major work-around^^)
The line needed to notify the embedder (go-flutter) editing state: setEditingState (calls to a platform method channel here)

[pchampio]

Can you please open a issue on flutter/flutter?
(and reference this issue in the flutter/flutter tracker if needed)

Tagging as wontfix for now, because it's not related to go-flutter

[Tokenyet]

Thanks for taking care this issue! I opened this issue 😄

[pchampio]

This issue is fixed in Flutter 1.12 stable.

❯ flutter --version
Flutter 1.12.13+hotfix.5 • channel stable • https://github.com/flutter/flutter
Framework • revision 27321ebbad (2 weeks ago) • 2019-12-10 18:15:01 -0800
Engine • revision 2994f7e1e6
Tools • Dart 2.7.0

The flutter/flutter framework is using the "flutter/keyevent" BasicMessageChannel to register the copy event on the framework side.
The framework is then sending the text content through the "Clipboard.setData" method of "flutter/platform" in the same manner as it is done when the user clicks the copy popup button.

[pchampio]

As we are using RawKeyEventDataLinux (GLFW compatible) this means the flutter framework would need have different handles for modifier keys on different platforms. i.e. different handles on (linux/macos/window) (ctrl-c vs cmd-c) for the SAME render-er backend (GLFW in your case).

[pchampio]

The issue of using the flutter/keyevent to interact with keyboard shortcut/text movement is described in https://github.com/go-flutter-desktop/go-flutter/issues/314.
Closing this issue.