rich_text.dart

// Copyright 2019 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 'dart:async';
import 'dart:io';

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

import 'diagram_step.dart';

class RichTextDiagram extends StatelessWidget implements DiagramMetadata {
  const RichTextDiagram(this.name);

  @override
  final String name;

  @override
  Widget build(BuildContext context) {
    return ConstrainedBox(
      key: UniqueKey(),
      constraints: BoxConstraints.tight(const Size(240.0, 140.0)),
      child: Container(
        alignment: FractionalOffset.center,
        padding: const EdgeInsets.all(5.0),
        color: Colors.white,
        child: RichText(
          text: TextSpan(
            text: 'Hello ',
            style: DefaultTextStyle.of(context).style,
            children: const <TextSpan>[
              TextSpan(text: 'bold', style: TextStyle(fontWeight: FontWeight.bold)),
              TextSpan(text: ' world!'),
            ],
          ),
        ),
      ),
    );
  }
}

class RichTextDiagramStep extends DiagramStep<RichTextDiagram> {
  RichTextDiagramStep(DiagramController controller) : super(controller);

  @override
  final String category = 'widgets';

  @override
  Future<List<RichTextDiagram>> get diagrams async => <RichTextDiagram>[
        const RichTextDiagram('rich_text'),
      ];

  @override
  Future<File> generateDiagram(RichTextDiagram diagram) async {
    controller.builder = (BuildContext context) => diagram;
    return await controller.drawDiagramToFile(File('${diagram.name}.png'));
  }
}