immich/mobile/lib/pages/editing/crop.page.dart

import 'package:flutter/material.dart';
import 'package:crop_image/crop_image.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:immich_mobile/extensions/build_context_extensions.dart';
import 'package:immich_mobile/routing/router.dart';
import 'package:immich_mobile/utils/hooks/crop_controller_hook.dart';
import 'package:immich_mobile/entities/asset.entity.dart';
import 'edit.page.dart';
import 'package:easy_localization/easy_localization.dart';
import 'package:auto_route/auto_route.dart';

/// A widget for cropping an image.
/// This widget uses [HookWidget] to manage its lifecycle and state. It allows
/// users to crop an image and then navigate to the [EditImagePage] with the
/// cropped image.

@RoutePage()
class CropImagePage extends HookWidget {
  final Image image;
  final Asset asset;
  const CropImagePage({super.key, required this.image, required this.asset});

  @override
  Widget build(BuildContext context) {
    final cropController = useCropController();
    final aspectRatio = useState<double?>(null);

    return Scaffold(
      appBar: AppBar(
        backgroundColor: context.scaffoldBackgroundColor,
        title: Text("crop".tr()),
        leading: CloseButton(color: context.primaryColor),
        actions: [
          IconButton(
            icon: Icon(Icons.done_rounded, color: context.primaryColor, size: 24),
            onPressed: () async {
              final croppedImage = await cropController.croppedImage();
              context.pushRoute(EditImageRoute(asset: asset, image: croppedImage, isEdited: true));
            },
          ),
        ],
      ),
      backgroundColor: context.scaffoldBackgroundColor,
      body: SafeArea(
        child: LayoutBuilder(
          builder: (BuildContext context, BoxConstraints constraints) {
            return Column(
              children: [
                Container(
                  padding: const EdgeInsets.only(top: 20),
                  width: constraints.maxWidth * 0.9,
                  height: constraints.maxHeight * 0.6,
                  child: CropImage(controller: cropController, image: image, gridColor: Colors.white),
                ),
                Expanded(
                  child: Container(
                    width: double.infinity,
                    decoration: BoxDecoration(
                      color: context.scaffoldBackgroundColor,
                      borderRadius: const BorderRadius.only(
                        topLeft: Radius.circular(20),
                        topRight: Radius.circular(20),
                      ),
                    ),
                    child: Center(
                      child: Column(
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: [
                          Padding(
                            padding: const EdgeInsets.only(left: 20, right: 20, bottom: 10),
                            child: Row(
                              mainAxisAlignment: MainAxisAlignment.spaceBetween,
                              children: [
                                IconButton(
                                  icon: Icon(Icons.rotate_left, color: context.themeData.iconTheme.color),
                                  onPressed: () {
                                    cropController.rotateLeft();
                                  },
                                ),
                                IconButton(
                                  icon: Icon(Icons.rotate_right, color: context.themeData.iconTheme.color),
                                  onPressed: () {
                                    cropController.rotateRight();
                                  },
                                ),
                              ],
                            ),
                          ),
                          Row(
                            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                            children: <Widget>[
                              _AspectRatioButton(
                                cropController: cropController,
                                aspectRatio: aspectRatio,
                                ratio: null,
                                label: 'Free',
                              ),
                              _AspectRatioButton(
                                cropController: cropController,
                                aspectRatio: aspectRatio,
                                ratio: 1.0,
                                label: '1:1',
                              ),
                              _AspectRatioButton(
                                cropController: cropController,
                                aspectRatio: aspectRatio,
                                ratio: 16.0 / 9.0,
                                label: '16:9',
                              ),
                              _AspectRatioButton(
                                cropController: cropController,
                                aspectRatio: aspectRatio,
                                ratio: 3.0 / 2.0,
                                label: '3:2',
                              ),
                              _AspectRatioButton(
                                cropController: cropController,
                                aspectRatio: aspectRatio,
                                ratio: 7.0 / 5.0,
                                label: '7:5',
                              ),
                            ],
                          ),
                        ],
                      ),
                    ),
                  ),
                ),
              ],
            );
          },
        ),
      ),
    );
  }
}

class _AspectRatioButton extends StatelessWidget {
  final CropController cropController;
  final ValueNotifier<double?> aspectRatio;
  final double? ratio;
  final String label;

  const _AspectRatioButton({
    required this.cropController,
    required this.aspectRatio,
    required this.ratio,
    required this.label,
  });

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        IconButton(
          icon: Icon(switch (label) {
            'Free' => Icons.crop_free_rounded,
            '1:1' => Icons.crop_square_rounded,
            '16:9' => Icons.crop_16_9_rounded,
            '3:2' => Icons.crop_3_2_rounded,
            '7:5' => Icons.crop_7_5_rounded,
            _ => Icons.crop_free_rounded,
          }, color: aspectRatio.value == ratio ? context.primaryColor : context.themeData.iconTheme.color),
          onPressed: () {
            cropController.crop = const Rect.fromLTRB(0.1, 0.1, 0.9, 0.9);
            aspectRatio.value = ratio;
            cropController.aspectRatio = ratio;
          },
        ),
        Text(label, style: context.textTheme.displayMedium),
      ],
    );
  }
}