packages/devtools_app/lib/src/debugger/console.dart

// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

import '../common_widgets.dart';
import '../console.dart';
import '../utils.dart';
import 'debugger_controller.dart';

// TODO(devoncarew): Show some small UI indicator when we receive stdout/stderr.

/// Display the stdout and stderr output from the process under debug.
class DebuggerConsole extends StatefulWidget {
  const DebuggerConsole({
    Key key,
    this.controller,
  }) : super(key: key);

  final DebuggerController controller;

  @override
  _DebuggerConsoleState createState() => _DebuggerConsoleState();

  static const copyToClipboardButtonKey =
      Key('debugger_console_copy_to_clipboard_button');
  static const clearStdioButtonKey = Key('debugger_console_clear_stdio_button');
}

class _DebuggerConsoleState extends State<DebuggerConsole> {
  var _lines = <String>[];

  @override
  void initState() {
    super.initState();

    _lines = widget.controller.stdio.value;
    widget.controller.stdio.addListener(_onStdioChanged);
  }

  void _onStdioChanged() {
    setState(() {
      _lines = widget.controller.stdio.value;
    });
  }

  @override
  void dispose() {
    widget.controller.stdio.removeListener(_onStdioChanged);
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final numLines = _lines.length;
    final disabled = numLines == 0;

    return OutlineDecoration(
      child: Console(
        title: areaPaneHeader(
          context,
          title: 'Console',
          needsTopBorder: false,
          actions: [
            CopyToClipboardControl(
              dataProvider: disabled ? null : () => _lines.join('\n'),
              successMessage:
                  'Copied $numLines ${pluralize('line', numLines)}.',
              buttonKey: DebuggerConsole.copyToClipboardButtonKey,
            ),
            DeleteControl(
              buttonKey: DebuggerConsole.clearStdioButtonKey,
              tooltip: 'Clear console output',
              onPressed: disabled ? null : widget.controller.clearStdio,
            ),
          ],
        ),
        lines: _lines,
      ),
    );
  }
}