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onPaste of ContextMenuBuilder is not getting called during some paste events. #160908

@Velkamhell97

Description

@Velkamhell97

I open this issue because the original one #117329 was closed without a proper solution.

The method onPaste from ContextMenuBuilder is not getting called when certain paste events are being triggered, specifically when pasting text using the toolbar of the keyboard or when accessing the clipboard itself from the keyboard.

Steps to reproduce

Run the code example and try to catch the paste event from the keyboard toolbar.

Expected results

onPaste should get called whenever a paste event occurs no matter the origin.

Actual results

onPaste gets called when you paste content through the floating toolbar (the one that shows when long pressing a TextField), but it doesn't execute when you paste content through the keyboard's toolbar

Code sample

Code sample
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: TextField(
          contextMenuBuilder: (context, editableTextState) {
              return AdaptiveTextSelectionToolbar.editable(
                anchors: editableTextState.contextMenuAnchors,
                clipboardStatus: ClipboardStatus.pasteable,
                onLiveTextInput: null,
                onLookUp: null,
                onSearchWeb: null,
                onShare: null,
                onCopy: null,
                onCut: null,
                onPaste: () {
                  print('ON PASTE');
                },
                onSelectAll: null,
              );
            },
        ),
      ),
    );
  }
}

Screenshots or Video

Screenshots / Video demonstration
AYYZxbD6gG.mp4

Logs

Logs
[Paste your logs here]

Flutter Doctor output

Doctor output
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.27.1, on Microsoft Windows [Versi¢n 10.0.26120.2705], locale es-MX)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[√] Chrome - develop for the web
[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.5.0)
[√] Android Studio (version 2024.2)
[√] VS Code (version 1.89.1)
[√] Connected device (4 available)
[√] Network resources

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    a: text inputEntering text in a text field or keyboard related problemsfound in release: 3.27Found to occur in 3.27found in release: 3.28Found to occur in 3.28frameworkflutter/packages/flutter repository. See also f: labels.has reproducible stepsThe issue has been confirmed reproducible and is ready to work onr: fixedIssue is closed as already fixed in a newer versionteam-text-inputOwned by Text Input team

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