♻️ Reconstruct folders

Author: AlexV525

lib/src/constants/constants.dart

@@ -2,17 +2,11 @@
 /// [Author] Alex (https://github.com/AlexV525)
 /// [Date] 2020/7/15 02:06
 ///
-import 'dart:async';
-import 'dart:developer';
-
-import 'package:flutter/foundation.dart';
-import 'package:flutter/widgets.dart';
-import 'package:wechat_camera_picker/wechat_camera_picker.dart';
+import '../delegates/camera_picker_text_delegate.dart';
 
 export 'package:photo_manager/photo_manager.dart';
 
 export '../delegates/camera_picker_text_delegate.dart';
-export 'colors.dart';
 export 'screens.dart';
 
 class Constants {
@@ -21,25 +15,3 @@ class Constants {
   static CameraPickerTextDelegate textDelegate =
       DefaultCameraPickerTextDelegate();
 }
-
-/// Log only in debug mode.
-/// 只在调试模式打印
-void realDebugPrint(dynamic message) {
-  if (!kReleaseMode) {
-    log('$message', name: 'CameraPicker - LOG');
-  }
-}
-
-int get currentTimeStamp => DateTime.now().millisecondsSinceEpoch;
-
-const BorderRadius maxBorderRadius = BorderRadius.all(Radius.circular(999999));
-
-extension SafeSetStateExtension on State {
-  FutureOr<void> safeSetState(FutureOr<dynamic> Function() fn) async {
-    await fn();
-    if (mounted) {
-      // ignore: invalid_use_of_protected_member
-      setState(() {});
-    }
-  }
-}

lib/src/constants/screens.dart

@@ -4,8 +4,8 @@
 ///
 import 'dart:ui' as ui;
 
-import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter/widgets.dart';
 
 /// Screens utils with multiple properties access.
 /// 获取屏幕各项属性的工具类

lib/src/constants/colors.dart renamed to lib/src/constants/styles.dart

@@ -1,9 +1,11 @@
 ///
 /// [Author] Alex (https://github.com/AlexV525)
-/// [Date] 2020/7/15 02:05
+/// [Date] 2021/9/30 17:00
 ///
 import 'package:flutter/painting.dart';
 
 class C {
   static const Color themeColor = Color(0xff00bc56); // WeChat
 }
+
+const BorderRadius maxBorderRadius = BorderRadius.all(Radius.circular(999999));

lib/src/internals/enums.dart

@@ -0,0 +1,8 @@
+///
+/// [Author] Alex (https://github.com/AlexV525)
+/// [Date] 2021/9/30 17:06
+///
+
+/// Two types for the viewer: image and video.
+/// 两种预览类型：图片和视频
+enum CameraPickerViewType { image, video }

lib/src/internals/extensions.dart

@@ -0,0 +1,18 @@
+
+///
+/// [Author] Alex (https://github.com/AlexV525)
+/// [Date] 2021/9/30 17:02
+///
+import 'dart:async';
+
+import 'package:flutter/widgets.dart';
+
+extension SafeSetStateExtension on State {
+  FutureOr<void> safeSetState(FutureOr<dynamic> Function() fn) async {
+    await fn();
+    if (mounted) {
+      // ignore: invalid_use_of_protected_member
+      setState(() {});
+    }
+  }
+}

lib/src/internals/methods.dart

@@ -0,0 +1,15 @@
+///
+/// [Author] Alex (https://github.com/AlexV525)
+/// [Date] 2021/9/30 17:01
+///
+import 'dart:developer';
+
+import 'package:flutter/foundation.dart';
+
+/// Log only in debug mode.
+/// 只在调试模式打印
+void realDebugPrint(dynamic message) {
+  if (!kReleaseMode) {
+    log('$message', name: 'CameraPicker - LOG');
+  }
+}

lib/src/internals/type_defs.dart

@@ -0,0 +1,31 @@
+///
+/// [Author] Alex (https://github.com/AlexV525)
+/// [Date] 2021/9/30 17:04
+///
+import 'dart:async';
+import 'dart:io';
+
+import 'package:flutter/widgets.dart';
+
+import '../internals/enums.dart';
+
+/// {@template wechat_camera_picker.SaveEntityCallback}
+/// The callback type define for saving entity in the viewer.
+/// 在查看器中保存图片时的回调
+///
+/// ### Notice about the implementation
+///  * After the callback is implemented, the default saving method
+///    won't called anymore.
+///  * Don't call `Navigator.of(context).pop/maybePop` without popping `null` or
+///    `AssetEntity`, otherwise there will be a type cast error occurred.
+///
+/// ### 在实现时需要注意
+///  * 实现该方法后，原本的保存方法不会再被调用；
+///  * 不要使用 `Navigator.of(context).pop/maybePop` 返回 `null` 或 `AssetEntity`
+///    以外类型的内容，否则会抛出类型转换异常。
+/// {@endtemplate}
+typedef EntitySaveCallback = FutureOr<dynamic> Function({
+  BuildContext context,
+  CameraPickerViewType viewType,
+  File file,
+});

lib/src/widget/builder/slide_page_transition_builder.dart renamed to lib/src/widgets/builder/slide_page_transition_builder.dart

@@ -12,7 +12,12 @@ import 'package:flutter/scheduler.dart';
 import 'package:flutter/services.dart';
 
 import '../constants/constants.dart';
-import '../widget/circular_progress_bar.dart';
+import '../constants/styles.dart';
+import '../internals/enums.dart';
+import '../internals/extensions.dart';
+import '../internals/methods.dart';
+import '../internals/type_defs.dart';
+import '../widgets/circular_progress_bar.dart';
 
 import 'builder/slide_page_transition_builder.dart';
 import 'camera_picker_viewer.dart';
@@ -686,7 +691,13 @@ class CameraPickerState extends State<CameraPicker>
   /// taking pictures.
   /// 仅当初始化成功且相机未在拍照时拍照。
   Future<void> takePicture() async {
-    if (controller.value.isInitialized && !controller.value.isTakingPicture) {
+    if (!controller.value.isInitialized) {
+      throw StateError('Camera has not initialized.');
+    }
+    if (controller.value.isTakingPicture) {
+      return;
+    }
+    try {
       final XFile _file = await controller.takePicture();
       // Delay disposing the controller to hold the preview.
       Future<void>.delayed(const Duration(milliseconds: 500), () {
@@ -707,6 +718,9 @@ class CameraPickerState extends State<CameraPicker>
       }
       initCameras(currentCamera);
       safeSetState(() {});
+    } catch (e) {
+      realDebugPrint('Error when preview the captured file: $e');
+      rethrow;
     }
   }
 
@@ -1152,7 +1166,7 @@ class CameraPickerState extends State<CameraPicker>
               _shouldReverseLayout ? TextDirection.rtl : TextDirection.ltr,
           children: <Widget>[
             ExposurePointWidget(
-              key: ValueKey<int>(currentTimeStamp),
+              key: ValueKey<int>(DateTime.now().millisecondsSinceEpoch),
               size: _pointWidth,
               color: theme.iconTheme.color!,
             ),