pikapika/lib/screens/components/ImageReader.dart

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import 'dart:async';
import 'dart:io';
import 'package:another_xlider/another_xlider.dart';
import 'package:event/event.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
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import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
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import 'package:photo_view/photo_view_gallery.dart';
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import 'package:pikapika/basic/Common.dart';
import 'package:pikapika/basic/Cross.dart';
import 'package:pikapika/basic/Entities.dart';
import 'package:pikapika/basic/Method.dart';
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import 'package:pikapika/basic/config/Address.dart';
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import 'package:pikapika/basic/config/FullScreenAction.dart';
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import 'package:pikapika/basic/config/ImageAddress.dart';
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import 'package:pikapika/basic/config/KeyboardController.dart';
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import 'package:pikapika/basic/config/NoAnimation.dart';
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import 'package:pikapika/basic/config/Quality.dart';
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import 'package:pikapika/basic/config/ReaderDirection.dart';
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import 'package:pikapika/basic/config/ReaderSliderPosition.dart';
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import 'package:pikapika/basic/config/ReaderType.dart';
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import 'package:pikapika/basic/config/VolumeController.dart';
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import 'package:pikapika/screens/components/PkzImages.dart';
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import 'package:scrollable_positioned_list/scrollable_positioned_list.dart';
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import '../../basic/config/IconLoading.dart';
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import '../../basic/config/UseApiLoadImage.dart';
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import '../FilePhotoViewScreen.dart';
import 'gesture_zoom_box.dart';
import 'Images.dart';
///////////////
Event<_ReaderControllerEventArgs> _readerControllerEvent =
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Event<_ReaderControllerEventArgs>();
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class _ReaderControllerEventArgs extends EventArgs {
final String key;
_ReaderControllerEventArgs(this.key);
}
Widget readerKeyboardHolder(Widget widget) {
if (keyboardController &&
(Platform.isWindows || Platform.isMacOS || Platform.isLinux)) {
widget = RawKeyboardListener(
focusNode: FocusNode(),
child: widget,
autofocus: true,
onKey: (event) {
if (event is RawKeyDownEvent) {
if (event.isKeyPressed(LogicalKeyboardKey.arrowUp)) {
_readerControllerEvent.broadcast(_ReaderControllerEventArgs("UP"));
}
if (event.isKeyPressed(LogicalKeyboardKey.arrowDown)) {
_readerControllerEvent
.broadcast(_ReaderControllerEventArgs("DOWN"));
}
}
},
);
}
return widget;
}
void _onVolumeEvent(dynamic args) {
_readerControllerEvent.broadcast(_ReaderControllerEventArgs("$args"));
}
var _volumeListenCount = 0;
// 仅支持安卓
// 监听后会拦截安卓手机音量键
// 仅最后一次监听生效
// event可能为DOWN/UP
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EventChannel volumeButtonChannel = const EventChannel("volume_button");
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StreamSubscription? volumeS;
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void addVolumeListen() {
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_volumeListenCount++;
if (_volumeListenCount == 1) {
volumeS =
volumeButtonChannel.receiveBroadcastStream().listen(_onVolumeEvent);
}
}
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void delVolumeListen() {
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_volumeListenCount--;
if (_volumeListenCount == 0) {
volumeS?.cancel();
}
}
///////////////////////////////////////////////////////////////////////////////
// 对Reader的传参以及封装
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class PkzFile {
final String pkzPath;
final String path;
PkzFile(this.pkzPath, this.path);
}
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class ReaderImageInfo {
final String fileServer;
final String path;
final String? downloadLocalPath;
final int? width;
final int? height;
final String? format;
final int? fileSize;
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final PkzFile? pkzFile;
ReaderImageInfo(
this.fileServer,
this.path,
this.downloadLocalPath,
this.width,
this.height,
this.format,
this.fileSize, {
this.pkzFile,
});
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}
class ImageReaderStruct {
final List<ReaderImageInfo> images;
final bool fullScreen;
final FutureOr<dynamic> Function(bool fullScreen) onFullScreenChange;
final FutureOr<dynamic> Function(int) onPositionChange;
final int? initPosition;
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final Map<int, String> epNameMap;
final int epOrder;
final String comicTitle;
final FutureOr<dynamic> Function(int) onChangeEp;
final FutureOr<dynamic> Function() onReloadEp;
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final FutureOr<dynamic> Function() onDownload;
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const ImageReaderStruct({
required this.images,
required this.fullScreen,
required this.onFullScreenChange,
required this.onPositionChange,
this.initPosition,
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required this.epNameMap,
required this.epOrder,
required this.comicTitle,
required this.onChangeEp,
required this.onReloadEp,
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required this.onDownload,
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});
}
//
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class ImageReader extends StatefulWidget {
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final ImageReaderStruct struct;
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const ImageReader(this.struct, {Key? key}) : super(key: key);
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@override
State<StatefulWidget> createState() => _ImageReaderState();
}
class _ImageReaderState extends State<ImageReader> {
// 记录初始方向
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final ReaderDirection _pagerDirection = gReaderDirection;
// 记录初始阅读器类型
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final ReaderType _pagerType = currentReaderType();
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// 记录了控制器
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late final FullScreenAction _fullScreenAction = currentFullScreenAction();
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late final ReaderSliderPosition _readerSliderPosition =
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currentReaderSliderPosition();
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@override
Widget build(BuildContext context) {
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return _ImageReaderContent(
widget.struct,
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_pagerDirection,
_pagerType,
_fullScreenAction,
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_readerSliderPosition,
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);
}
}
//
class _ImageReaderContent extends StatefulWidget {
// 记录初始方向
final ReaderDirection pagerDirection;
// 记录初始阅读器类型
final ReaderType pagerType;
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final FullScreenAction fullScreenAction;
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final ReaderSliderPosition readerSliderPosition;
final ImageReaderStruct struct;
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const _ImageReaderContent(this.struct, this.pagerDirection, this.pagerType,
this.fullScreenAction, this.readerSliderPosition);
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@override
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State<StatefulWidget> createState() {
switch (pagerType) {
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case ReaderType.WEB_TOON:
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return _WebToonReaderState();
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case ReaderType.WEB_TOON_ZOOM:
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return _WebToonZoomReaderState();
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case ReaderType.GALLERY:
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return _GalleryReaderState();
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case ReaderType.WEB_TOON_FREE_ZOOM:
return _ListViewReaderState();
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default:
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throw Exception("ERROR READER TYPE");
}
}
}
abstract class _ImageReaderContentState extends State<_ImageReaderContent> {
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// 阅读器
Widget _buildViewer();
// 键盘, 音量键 等事件
void _needJumpTo(int index, bool animation);
// 记录了是否切换了音量
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late bool _listVolume;
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// 和初始化与翻页有关
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@override
void initState() {
_initCurrent();
_readerControllerEvent.subscribe(_onPageControl);
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_listVolume = volumeController;
if (_listVolume) {
addVolumeListen();
}
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super.initState();
}
@override
void dispose() {
_readerControllerEvent.unsubscribe(_onPageControl);
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if (_listVolume) {
delVolumeListen();
}
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super.dispose();
}
void _onPageControl(_ReaderControllerEventArgs? args) {
if (args != null) {
var event = args.key;
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switch (event) {
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case "UP":
if (_current > 0) {
_needJumpTo(_current - 1, true);
}
break;
case "DOWN":
if (_current < widget.struct.images.length - 1) {
_needJumpTo(_current + 1, true);
}
break;
}
}
}
late int _startIndex;
late int _current;
late int _slider;
void _initCurrent() {
if (widget.struct.initPosition != null &&
widget.struct.images.length > widget.struct.initPosition!) {
_startIndex = widget.struct.initPosition!;
} else {
_startIndex = 0;
}
_current = _startIndex;
_slider = _startIndex;
}
void _onCurrentChange(int index) {
if (index != _current) {
setState(() {
_current = index;
_slider = index;
widget.struct.onPositionChange(index);
});
}
}
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// 与显示有关的方法
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@override
Widget build(BuildContext context) {
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switch (currentFullScreenAction()) {
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// 按钮
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case FullScreenAction.CONTROLLER:
return Stack(
children: [
_buildViewer(),
_buildBar(_buildFullScreenControllerStackItem()),
],
);
case FullScreenAction.TOUCH_ONCE:
return Stack(
children: [
_buildTouchOnceControllerAction(_buildViewer()),
_buildBar(Container()),
],
);
case FullScreenAction.TOUCH_DOUBLE:
return Stack(
children: [
_buildTouchDoubleControllerAction(_buildViewer()),
_buildBar(Container()),
],
);
case FullScreenAction.TOUCH_DOUBLE_ONCE_NEXT:
return Stack(
children: [
_buildTouchDoubleOnceNextControllerAction(_buildViewer()),
_buildBar(Container()),
],
);
case FullScreenAction.THREE_AREA:
return Stack(
children: [
_buildViewer(),
_buildBar(_buildThreeAreaControllerAction()),
],
);
}
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}
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Widget _buildBar(Widget child) {
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switch (widget.readerSliderPosition) {
case ReaderSliderPosition.BOTTOM:
return Column(
children: [
_buildAppBar(),
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Expanded(child: child),
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widget.struct.fullScreen
? Container()
: Container(
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height: 45,
color: const Color(0x88000000),
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Container(width: 15),
IconButton(
icon: const Icon(Icons.fullscreen),
color: Colors.white,
onPressed: () {
widget.struct
.onFullScreenChange(!widget.struct.fullScreen);
},
),
Container(width: 10),
Expanded(
child:
widget.pagerType != ReaderType.WEB_TOON_FREE_ZOOM
? _buildSliderBottom()
: Container(),
),
Container(width: 10),
IconButton(
icon: const Icon(Icons.skip_next_outlined),
color: Colors.white,
onPressed: _onNextAction,
),
Container(width: 15),
],
),
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),
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widget.struct.fullScreen
? Container()
: Container(
color: const Color(0x88000000),
child: SafeArea(
top: false,
child: Container(),
),
),
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],
);
case ReaderSliderPosition.RIGHT:
return Column(
children: [
_buildAppBar(),
Expanded(
child: Stack(
children: [
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child,
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_buildSliderRight(),
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],
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),
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),
],
);
case ReaderSliderPosition.LEFT:
return Column(
children: [
_buildAppBar(),
Expanded(
child: Stack(
children: [
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child,
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_buildSliderLeft(),
],
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),
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),
],
);
}
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}
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Widget _buildAppBar() => widget.struct.fullScreen
? Container()
: AppBar(
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title: Text(
"${widget.struct.epNameMap[widget.struct.epOrder] ?? ""} - ${widget.struct.comicTitle}"),
actions: [
IconButton(
onPressed: _onChooseEp,
icon: const Icon(Icons.menu_open),
),
IconButton(
onPressed: _onMoreSetting,
icon: const Icon(Icons.more_horiz),
),
],
);
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Widget _buildSliderBottom() {
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return Column(
children: [
Expanded(child: Container()),
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SizedBox(
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height: 25,
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child: _buildSliderWidget(Axis.horizontal),
),
Expanded(child: Container()),
],
);
}
Widget _buildSliderLeft() => widget.struct.fullScreen
? Container()
: Align(
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alignment: Alignment.centerLeft,
child: Material(
color: Colors.transparent,
child: Container(
width: 35,
height: 300,
decoration: const BoxDecoration(
color: Color(0x66000000),
borderRadius: BorderRadius.only(
topRight: Radius.circular(10),
bottomRight: Radius.circular(10),
),
),
padding:
const EdgeInsets.only(top: 10, bottom: 10, left: 6, right: 5),
child: Center(
child: _buildSliderWidget(Axis.vertical),
),
),
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),
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);
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Widget _buildSliderRight() => widget.struct.fullScreen
? Container()
: Align(
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alignment: Alignment.centerRight,
child: Material(
color: Colors.transparent,
child: Container(
width: 35,
height: 300,
decoration: const BoxDecoration(
color: Color(0x66000000),
borderRadius: BorderRadius.only(
topLeft: Radius.circular(10),
bottomLeft: Radius.circular(10),
),
),
padding:
const EdgeInsets.only(top: 10, bottom: 10, left: 5, right: 6),
child: Center(
child: _buildSliderWidget(Axis.vertical),
),
),
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),
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);
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Widget _buildSliderWidget(Axis axis) {
return FlutterSlider(
axis: axis,
values: [_slider.toDouble()],
min: 0,
max: (widget.struct.images.length - 1).toDouble(),
onDragging: (handlerIndex, lowerValue, upperValue) {
_slider = (lowerValue.toInt());
},
onDragCompleted: (handlerIndex, lowerValue, upperValue) {
_slider = (lowerValue.toInt());
if (_slider != _current) {
_needJumpTo(_slider, false);
}
},
trackBar: FlutterSliderTrackBar(
inactiveTrackBar: BoxDecoration(
borderRadius: BorderRadius.circular(20),
color: Colors.grey.shade300,
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),
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activeTrackBar: BoxDecoration(
borderRadius: BorderRadius.circular(4),
color: Theme.of(context).colorScheme.secondary,
),
),
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step: const FlutterSliderStep(
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step: 1,
isPercentRange: false,
),
tooltip: FlutterSliderTooltip(custom: (value) {
double a = value + 1;
return Container(
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padding: const EdgeInsets.all(8),
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decoration: ShapeDecoration(
color: Colors.black.withAlpha(0xCC),
shape: RoundedRectangleBorder(
borderRadius: BorderRadiusDirectional.circular(3)),
),
child: Text(
'${a.toInt()}',
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style: const TextStyle(
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color: Colors.white,
fontSize: 18,
),
),
);
}),
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);
}
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Widget _buildFullScreenControllerStackItem() {
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if (widget.readerSliderPosition == ReaderSliderPosition.BOTTOM &&
!widget.struct.fullScreen) {
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return Container();
}
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if (widget.readerSliderPosition == ReaderSliderPosition.RIGHT) {
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return SafeArea(
child: Align(
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alignment: Alignment.bottomRight,
child: Material(
color: Colors.transparent,
child: Container(
padding:
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const EdgeInsets.only(left: 10, right: 10, top: 4, bottom: 4),
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margin: const EdgeInsets.only(bottom: 10),
decoration: const BoxDecoration(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(10),
bottomLeft: Radius.circular(10),
),
color: Color(0x88000000),
),
child: GestureDetector(
onTap: () {
widget.struct.onFullScreenChange(!widget.struct.fullScreen);
},
child: Icon(
widget.struct.fullScreen
? Icons.fullscreen_exit
: Icons.fullscreen_outlined,
size: 30,
color: Colors.white,
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),
),
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),
),
));
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}
return SafeArea(
child: Align(
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alignment: Alignment.bottomLeft,
child: Material(
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color: Colors.transparent,
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child: Container(
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padding:
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const EdgeInsets.only(left: 10, right: 10, top: 4, bottom: 4),
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margin: const EdgeInsets.only(bottom: 10),
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decoration: const BoxDecoration(
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borderRadius: BorderRadius.only(
topRight: Radius.circular(10),
bottomRight: Radius.circular(10),
),
color: Color(0x88000000),
),
child: GestureDetector(
onTap: () {
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widget.struct.onFullScreenChange(!widget.struct.fullScreen);
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},
child: Icon(
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widget.struct.fullScreen
? Icons.fullscreen_exit
: Icons.fullscreen_outlined,
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size: 30,
color: Colors.white,
),
),
),
),
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));
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}
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Widget _buildTouchOnceControllerAction(Widget child) {
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return GestureDetector(
behavior: HitTestBehavior.translucent,
onTap: () {
widget.struct.onFullScreenChange(!widget.struct.fullScreen);
},
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child: child,
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);
}
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Widget _buildTouchDoubleControllerAction(Widget child) {
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return GestureDetector(
behavior: HitTestBehavior.translucent,
onDoubleTap: () {
widget.struct.onFullScreenChange(!widget.struct.fullScreen);
},
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child: child,
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);
}
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Widget _buildTouchDoubleOnceNextControllerAction(Widget child) {
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return GestureDetector(
behavior: HitTestBehavior.translucent,
onTap: () {
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_readerControllerEvent.broadcast(_ReaderControllerEventArgs("DOWN"));
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},
onDoubleTap: () {
widget.struct.onFullScreenChange(!widget.struct.fullScreen);
},
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child: child,
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);
}
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Widget _buildThreeAreaControllerAction() {
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return LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
var up = Expanded(
child: GestureDetector(
behavior: HitTestBehavior.translucent,
onTap: () {
_readerControllerEvent
.broadcast(_ReaderControllerEventArgs("UP"));
},
child: Container(),
),
);
var down = Expanded(
child: GestureDetector(
behavior: HitTestBehavior.translucent,
onTap: () {
_readerControllerEvent
.broadcast(_ReaderControllerEventArgs("DOWN"));
},
child: Container(),
),
);
var fullScreen = Expanded(
child: GestureDetector(
behavior: HitTestBehavior.translucent,
onTap: () =>
widget.struct.onFullScreenChange(!widget.struct.fullScreen),
child: Container(),
),
);
late Widget child;
switch (widget.pagerDirection) {
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case ReaderDirection.TOP_TO_BOTTOM:
child = Column(children: [
up,
fullScreen,
down,
]);
break;
case ReaderDirection.LEFT_TO_RIGHT:
child = Row(children: [
up,
fullScreen,
down,
]);
break;
case ReaderDirection.RIGHT_TO_LEFT:
child = Row(children: [
down,
fullScreen,
up,
]);
break;
}
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return SizedBox(
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width: constraints.maxWidth,
height: constraints.maxHeight,
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child: child,
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);
},
);
}
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Future _onChooseEp() async {
showMaterialModalBottomSheet(
context: context,
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backgroundColor: const Color(0xAA000000),
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builder: (context) {
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return SizedBox(
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height: MediaQuery.of(context).size.height * (.45),
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child: _EpChooser(
widget.struct.epNameMap,
widget.struct.epOrder,
widget.struct.onChangeEp,
),
);
},
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);
}
Future _onMoreSetting() async {
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// 记录开始的画质
final currentQuality = currentQualityCode();
final cReaderSliderPosition = currentReaderSliderPosition();
//
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await showMaterialModalBottomSheet(
context: context,
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backgroundColor: const Color(0xAA000000),
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builder: (context) {
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return SizedBox(
height: MediaQuery.of(context).size.height * (.45),
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child: _SettingPanel(
widget.struct.onReloadEp,
widget.struct.onDownload,
),
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);
},
);
if (widget.pagerDirection != gReaderDirection ||
widget.pagerType != currentReaderType() ||
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currentQuality != currentQualityCode() ||
widget.fullScreenAction != currentFullScreenAction() ||
cReaderSliderPosition != currentReaderSliderPosition()) {
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widget.struct.onReloadEp();
}
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}
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// 给子类调用的方法
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bool _fullscreenController() {
switch (currentFullScreenAction()) {
case FullScreenAction.CONTROLLER:
return false;
case FullScreenAction.TOUCH_ONCE:
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return false;
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case FullScreenAction.TOUCH_DOUBLE:
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return false;
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case FullScreenAction.TOUCH_DOUBLE_ONCE_NEXT:
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return false;
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case FullScreenAction.THREE_AREA:
return true;
}
}
Future _onNextAction() async {
if (widget.struct.epNameMap.containsKey(widget.struct.epOrder + 1)) {
widget.struct.onChangeEp(widget.struct.epOrder + 1);
} else {
defaultToast(context, "已经到头了");
}
}
bool _hasNextEp() =>
widget.struct.epNameMap.containsKey(widget.struct.epOrder + 1);
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double _topBarHeight() => Scaffold.of(context).appBarMaxHeight ?? 0;
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double _bottomBarHeight() =>
widget.readerSliderPosition == ReaderSliderPosition.BOTTOM ? 45 : 0;
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}
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class _EpChooser extends StatefulWidget {
final Map<int, String> epNameMap;
final int epOrder;
final FutureOr Function(int) onChangeEp;
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_EpChooser(this.epNameMap, this.epOrder, this.onChangeEp);
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@override
State<StatefulWidget> createState() => _EpChooserState();
}
class _EpChooserState extends State<_EpChooser> {
@override
Widget build(BuildContext context) {
var entries = widget.epNameMap.entries.toList();
entries.sort((a, b) => a.key - b.key);
var widgets = [
Container(height: 20),
...entries.map((e) {
return Container(
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margin: const EdgeInsets.only(left: 15, right: 15, top: 5, bottom: 5),
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decoration: BoxDecoration(
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color: widget.epOrder == e.key ? Colors.grey.withAlpha(100) : null,
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border: Border.all(
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color: const Color(0xff484c60),
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style: BorderStyle.solid,
width: .5,
),
),
child: MaterialButton(
onPressed: () {
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Navigator.of(context).pop();
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widget.onChangeEp(e.key);
},
textColor: Colors.white,
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child: Text(e.value),
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),
);
})
];
return ScrollablePositionedList.builder(
initialScrollIndex: widget.epOrder < 2 ? 0 : widget.epOrder - 2,
itemCount: widgets.length,
itemBuilder: (BuildContext context, int index) => widgets[index],
);
}
}
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class _SettingPanel extends StatefulWidget {
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final FutureOr Function() onReloadEp;
final FutureOr Function() onDownload;
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_SettingPanel(this.onReloadEp, this.onDownload);
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@override
State<StatefulWidget> createState() => _SettingPanelState();
}
class _SettingPanelState extends State<_SettingPanel> {
@override
Widget build(BuildContext context) {
return ListView(
children: [
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Row(
children: [
_bottomIcon(
icon: Icons.crop_sharp,
title: gReaderDirectionName(),
onPressed: () async {
await choosePagerDirection(context);
setState(() {});
},
),
_bottomIcon(
icon: Icons.view_day_outlined,
title: currentReaderTypeName(),
onPressed: () async {
await choosePagerType(context);
setState(() {});
},
),
_bottomIcon(
icon: Icons.image_aspect_ratio_outlined,
title: currentQualityName(),
onPressed: () async {
await chooseQuality(context);
setState(() {});
},
),
_bottomIcon(
icon: Icons.control_camera_outlined,
title: currentFullScreenActionName(),
onPressed: () async {
await chooseFullScreenAction(context);
setState(() {});
},
),
],
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),
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Row(
children: [
_bottomIcon(
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icon: Icons.share,
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title: currentAddressName(),
onPressed: () async {
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await chooseAddressAndSwitch(context);
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setState(() {});
},
),
_bottomIcon(
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icon: Icons.image_search,
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title: currentImageAddressName(),
onPressed: () async {
await chooseImageAddress(context);
setState(() {});
},
),
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_bottomIcon(
icon: Icons.network_ping,
title: currentUseApiLoadImageName(),
onPressed: () {
chooseUseApiLoadImage(context);
},
),
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_bottomIcon(
icon: Icons.refresh,
title: "重载页面",
onPressed: () {
Navigator.of(context).pop();
widget.onReloadEp();
},
),
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// _bottomIcon(
// icon: Icons.file_download,
// title: "下载本作",
// onPressed: widget.onDownload,
// ),
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],
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),
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],
);
}
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Widget _bottomIcon({
required IconData icon,
required String title,
required void Function() onPressed,
}) {
return Expanded(
child: Center(
child: Column(
children: [
IconButton(
iconSize: 55,
icon: Column(
children: [
Container(height: 3),
Icon(
icon,
size: 25,
color: Colors.white,
),
Container(height: 3),
Text(
title,
style: const TextStyle(color: Colors.white, fontSize: 10),
maxLines: 1,
textAlign: TextAlign.center,
),
Container(height: 3),
],
),
onPressed: onPressed,
)
],
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),
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),
);
}
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}
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///////////////////////////////////////////////////////////////////////////////
class _WebToonReaderState extends _ImageReaderContentState {
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var _controllerTime = DateTime.now().millisecondsSinceEpoch + 400;
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late final List<Size?> _trueSizes = [];
late final ItemScrollController _itemScrollController;
late final ItemPositionsListener _itemPositionsListener;
@override
void initState() {
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for (var e in widget.struct.images) {
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if (e.pkzFile != null &&
e.width != null &&
e.height != null &&
e.width! > 0 &&
e.height! > 0) {
_trueSizes.add(Size(e.width!.toDouble(), e.height!.toDouble()));
} else if (e.downloadLocalPath != null) {
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_trueSizes.add(Size(e.width!.toDouble(), e.height!.toDouble()));
} else {
_trueSizes.add(null);
}
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}
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_itemScrollController = ItemScrollController();
_itemPositionsListener = ItemPositionsListener.create();
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_itemPositionsListener.itemPositions.addListener(_onListCurrentChange);
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super.initState();
}
@override
void dispose() {
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_itemPositionsListener.itemPositions.removeListener(_onListCurrentChange);
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super.dispose();
}
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void _onListCurrentChange() {
var to = _itemPositionsListener.itemPositions.value.first.index;
// 包含一个下一章, 假设5张图片 0,1,2,3,4 length=5, 下一章=5
if (to >= 0 && to < widget.struct.images.length) {
super._onCurrentChange(to);
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}
}
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@override
void _needJumpTo(int index, bool animation) {
if (noAnimation() || animation == false) {
_itemScrollController.jumpTo(
index: index,
);
} else {
if (DateTime.now().millisecondsSinceEpoch < _controllerTime) {
return;
}
_controllerTime = DateTime.now().millisecondsSinceEpoch + 400;
_itemScrollController.scrollTo(
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index: index,
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duration: const Duration(milliseconds: 400),
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);
}
}
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@override
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Widget _buildViewer() {
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return Container(
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decoration: const BoxDecoration(
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color: Colors.black,
),
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child: _buildList(),
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);
}
Widget _buildList() {
return LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
// reload _images size
List<Widget> _images = [];
for (var index = 0; index < widget.struct.images.length; index++) {
late Size renderSize;
if (_trueSizes[index] != null) {
if (widget.pagerDirection == ReaderDirection.TOP_TO_BOTTOM) {
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renderSize = Size(
constraints.maxWidth,
constraints.maxWidth *
_trueSizes[index]!.height /
_trueSizes[index]!.width,
);
} else {
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var maxHeight = constraints.maxHeight -
super._topBarHeight() -
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super._bottomBarHeight() -
MediaQuery.of(context).padding.bottom;
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renderSize = Size(
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maxHeight *
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_trueSizes[index]!.width /
_trueSizes[index]!.height,
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maxHeight,
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);
}
} else {
if (widget.pagerDirection == ReaderDirection.TOP_TO_BOTTOM) {
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renderSize = Size(constraints.maxWidth, constraints.maxWidth / 2);
} else {
// ReaderDirection.LEFT_TO_RIGHT
// ReaderDirection.RIGHT_TO_LEFT
renderSize =
Size(constraints.maxWidth / 2, constraints.maxHeight);
}
}
var currentIndex = index;
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onTrueSize(Size size) {
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setState(() {
_trueSizes[currentIndex] = size;
});
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}
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var e = widget.struct.images[index];
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if (e.pkzFile != null) {
_images.add(_WebToonPkzImage(
width: e.width!,
height: e.height!,
format: e.format!,
size: renderSize,
onTrueSize: onTrueSize,
pkzFile: e.pkzFile!,
));
} else if (e.downloadLocalPath != null) {
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_images.add(_WebToonDownloadImage(
fileServer: e.fileServer,
path: e.path,
localPath: e.downloadLocalPath!,
fileSize: e.fileSize!,
width: e.width!,
height: e.height!,
format: e.format!,
size: renderSize,
onTrueSize: onTrueSize,
));
} else {
_images.add(_WebToonRemoteImage(
e.fileServer,
e.path,
renderSize,
onTrueSize,
));
}
}
return ScrollablePositionedList.builder(
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initialScrollIndex: super._startIndex,
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scrollDirection:
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widget.pagerDirection == ReaderDirection.TOP_TO_BOTTOM
? Axis.vertical
: Axis.horizontal,
reverse: widget.pagerDirection == ReaderDirection.RIGHT_TO_LEFT,
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padding: EdgeInsets.only(
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// 不管全屏与否, 滚动方向如何, 顶部永远保持间距
top: super._topBarHeight(),
bottom: widget.pagerDirection == ReaderDirection.TOP_TO_BOTTOM
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? 130 // 纵向滚动 底部永远都是130的空白
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: (super._bottomBarHeight() +
MediaQuery.of(context).padding.bottom)
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// 非全屏时, 顶部去掉顶部BAR的高度, 底部去掉底部BAR的高度, 形成看似填充的效果
,
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),
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itemScrollController: _itemScrollController,
itemPositionsListener: _itemPositionsListener,
itemCount: widget.struct.images.length + 1,
itemBuilder: (BuildContext context, int index) {
if (widget.struct.images.length == index) {
return _buildNextEp();
}
return _images[index];
},
);
},
);
}
Widget _buildNextEp() {
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if (super._fullscreenController()) {
return Container();
}
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return Container(
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color: Colors.transparent,
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padding: const EdgeInsets.all(20),
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child: MaterialButton(
onPressed: () {
if (super._hasNextEp()) {
super._onNextAction();
} else {
Navigator.of(context).pop();
}
},
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textColor: Colors.white,
child: Container(
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padding: const EdgeInsets.only(top: 40, bottom: 40),
child: Text(super._hasNextEp() ? '下一章' : '结束阅读'),
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),
),
);
}
}
// 来自下载
class _WebToonDownloadImage extends _WebToonReaderImage {
final String fileServer;
final String path;
final String localPath;
final int fileSize;
final int width;
final int height;
final String format;
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_WebToonDownloadImage({
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required this.fileServer,
required this.path,
required this.localPath,
required this.fileSize,
required this.width,
required this.height,
required this.format,
required Size size,
Function(Size)? onTrueSize,
}) : super(size, onTrueSize);
@override
Future<RemoteImageData> imageData() async {
if (localPath == "") {
return method.remoteImageData(fileServer, path);
}
var finalPath = await method.downloadImagePath(localPath);
return RemoteImageData.forData(
fileSize,
format,
width,
height,
finalPath,
);
}
}
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// 来自PKZ
class _WebToonPkzImage extends StatelessWidget {
final PkzFile pkzFile;
final int width;
final int height;
final String format;
final Size size;
Function(Size)? onTrueSize;
_WebToonPkzImage({
required this.pkzFile,
required this.width,
required this.height,
required this.format,
required this.size,
required this.onTrueSize,
});
@override
Widget build(BuildContext context) {
return PkzLoadingImage(
pkzPath: pkzFile.pkzPath,
path: pkzFile.path,
width: size.width,
height: size.height,
onTrueSize: onTrueSize,
);
}
}
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// 来自远端
class _WebToonRemoteImage extends _WebToonReaderImage {
final String fileServer;
final String path;
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_WebToonRemoteImage(
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this.fileServer,
this.path,
Size size,
Function(Size)? onTrueSize,
) : super(size, onTrueSize);
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@override
Future<RemoteImageData> imageData() async {
return method.remoteImageData(fileServer, path);
}
}
// 通用
abstract class _WebToonReaderImage extends StatefulWidget {
final Size size;
final Function(Size)? onTrueSize;
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_WebToonReaderImage(this.size, this.onTrueSize);
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@override
State<StatefulWidget> createState() => _WebToonReaderImageState();
Future<RemoteImageData> imageData();
}
class _WebToonReaderImageState extends State<_WebToonReaderImage> {
late Future<RemoteImageData> _future = _load();
Future<RemoteImageData> _load() {
return widget.imageData().then((value) {
widget.onTrueSize?.call(
Size(value.width.toDouble(), value.height.toDouble()),
);
return value;
});
}
@override
Widget build(BuildContext context) {
return LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return FutureBuilder(
future: _future,
builder: (
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BuildContext context,
AsyncSnapshot<RemoteImageData> snapshot,
) {
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if (snapshot.hasError) {
return GestureDetector(
onLongPress: () async {
String? choose =
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await chooseListDialog(context, '请选择', ['重新加载图片']);
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switch (choose) {
case '重新加载图片':
setState(() {
_future = _load();
});
break;
}
},
child: buildError(widget.size.width, widget.size.height),
);
}
if (snapshot.connectionState != ConnectionState.done) {
return buildLoading(widget.size.width, widget.size.height);
}
var data = snapshot.data!;
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return buildFile(
data.finalPath,
widget.size.width,
widget.size.height,
context: context,
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);
},
);
},
);
}
}
///////////////////////////////////////////////////////////////////////////////
class _WebToonZoomReaderState extends _WebToonReaderState {
@override
Widget _buildList() {
return GestureZoomBox(child: super._buildList());
}
}
///////////////////////////////////////////////////////////////////////////////
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class _ListViewReaderState extends _ImageReaderContentState
with SingleTickerProviderStateMixin {
final List<Size?> _trueSizes = [];
final _transformationController = TransformationController();
late TapDownDetails _doubleTapDetails;
late final _animationController = AnimationController(
vsync: this,
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duration: const Duration(milliseconds: 100),
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);
@override
void initState() {
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for (var e in widget.struct.images) {
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if (e.pkzFile != null &&
e.width != null &&
e.height != null &&
e.width! > 0 &&
e.height! > 0) {
_trueSizes.add(Size(e.width!.toDouble(), e.height!.toDouble()));
} else if (e.downloadLocalPath != null) {
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_trueSizes.add(Size(e.width!.toDouble(), e.height!.toDouble()));
} else {
_trueSizes.add(null);
}
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}
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super.initState();
}
@override
void dispose() {
_transformationController.dispose();
_animationController.dispose();
super.dispose();
}
@override
void _needJumpTo(int index, bool animation) {}
@override
Widget _buildViewer() {
return Container(
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decoration: const BoxDecoration(
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color: Colors.black,
),
child: _buildList(),
);
}
Widget _buildList() {
return LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
// reload _images size
List<Widget> _images = [];
for (var index = 0; index < widget.struct.images.length; index++) {
late Size renderSize;
if (_trueSizes[index] != null) {
if (widget.pagerDirection == ReaderDirection.TOP_TO_BOTTOM) {
renderSize = Size(
constraints.maxWidth,
constraints.maxWidth *
_trueSizes[index]!.height /
_trueSizes[index]!.width,
);
} else {
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var maxHeight = constraints.maxHeight -
super._topBarHeight() -
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super._bottomBarHeight() -
MediaQuery.of(context).padding.bottom;
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renderSize = Size(
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maxHeight *
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_trueSizes[index]!.width /
_trueSizes[index]!.height,
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maxHeight,
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);
}
} else {
if (widget.pagerDirection == ReaderDirection.TOP_TO_BOTTOM) {
renderSize = Size(constraints.maxWidth, constraints.maxWidth / 2);
} else {
// ReaderDirection.LEFT_TO_RIGHT
// ReaderDirection.RIGHT_TO_LEFT
renderSize =
Size(constraints.maxWidth / 2, constraints.maxHeight);
}
}
var currentIndex = index;
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onTrueSize(Size size) {
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setState(() {
_trueSizes[currentIndex] = size;
});
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}
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var e = widget.struct.images[index];
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if (e.pkzFile != null) {
_images.add(_WebToonPkzImage(
width: e.width!,
height: e.height!,
format: e.format!,
size: renderSize,
onTrueSize: onTrueSize,
pkzFile: e.pkzFile!,
));
} else if (e.downloadLocalPath != null) {
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_images.add(_WebToonDownloadImage(
fileServer: e.fileServer,
path: e.path,
localPath: e.downloadLocalPath!,
fileSize: e.fileSize!,
width: e.width!,
height: e.height!,
format: e.format!,
size: renderSize,
onTrueSize: onTrueSize,
));
} else {
_images.add(_WebToonRemoteImage(
e.fileServer,
e.path,
renderSize,
onTrueSize,
));
}
}
var list = ListView.builder(
scrollDirection:
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widget.pagerDirection == ReaderDirection.TOP_TO_BOTTOM
? Axis.vertical
: Axis.horizontal,
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reverse: widget.pagerDirection == ReaderDirection.RIGHT_TO_LEFT,
padding: EdgeInsets.only(
// 不管全屏与否, 滚动方向如何, 顶部永远保持间距
top: super._topBarHeight(),
bottom: widget.pagerDirection == ReaderDirection.TOP_TO_BOTTOM
? 130 // 纵向滚动 底部永远都是130的空白
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: (super._bottomBarHeight() +
MediaQuery.of(context).padding.bottom)
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// 非全屏时, 顶部去掉顶部BAR的高度, 底部去掉底部BAR的高度, 形成看似填充的效果
,
),
itemCount: widget.struct.images.length + 1,
itemBuilder: (BuildContext context, int index) {
if (widget.struct.images.length == index) {
return _buildNextEp();
}
return _images[index];
},
);
var viewer = InteractiveViewer(
transformationController: _transformationController,
minScale: 1,
maxScale: 2,
child: list,
);
return GestureDetector(
onDoubleTap: _handleDoubleTap,
onDoubleTapDown: _handleDoubleTapDown,
child: viewer,
);
},
);
}
Widget _buildNextEp() {
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if (super._fullscreenController()) {
return Container();
}
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return Container(
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padding: const EdgeInsets.all(20),
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child: MaterialButton(
onPressed: () {
if (super._hasNextEp()) {
super._onNextAction();
} else {
Navigator.of(context).pop();
}
},
textColor: Colors.white,
child: Container(
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padding: const EdgeInsets.only(top: 40, bottom: 40),
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child: Text(super._hasNextEp() ? '下一章' : '结束阅读'),
),
),
);
}
void _handleDoubleTapDown(TapDownDetails details) {
_doubleTapDetails = details;
}
void _handleDoubleTap() {
if (_animationController.isAnimating) {
return;
}
if (_transformationController.value != Matrix4.identity()) {
_transformationController.value = Matrix4.identity();
} else {
var position = _doubleTapDetails.localPosition;
var animation = Tween(begin: 0, end: 1.0).animate(_animationController);
animation.addListener(() {
_transformationController.value = Matrix4.identity()
..translate(
-position.dx * animation.value, -position.dy * animation.value)
..scale(animation.value + 1.0);
});
_animationController.forward(from: 0);
}
}
}
///////////////////////////////////////////////////////////////////////////////
class _GalleryReaderState extends _ImageReaderContentState {
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late PageController _pageController;
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@override
void initState() {
super.initState();
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// 需要先初始化 super._startIndex 才能使用, 所以在上面
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_pageController = PageController(initialPage: super._startIndex);
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}
@override
void dispose() {
_pageController.dispose();
super.dispose();
}
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@override
void _needJumpTo(int index, bool animation) {
if (noAnimation() || animation == false) {
_pageController.jumpToPage(
index,
);
} else {
_pageController.animateToPage(
index,
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duration: const Duration(milliseconds: 400),
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curve: Curves.ease,
);
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}
}
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void _onGalleryPageChange(int to) {
// 包含一个下一章, 假设5张图片 0,1,2,3,4 length=5, 下一章=5
if (to >= 0 && to < widget.struct.images.length) {
super._onCurrentChange(to);
}
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}
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@override
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Widget _buildViewer() {
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Widget gallery = PhotoViewGallery.builder(
scrollDirection: widget.pagerDirection == ReaderDirection.TOP_TO_BOTTOM
? Axis.vertical
: Axis.horizontal,
reverse: widget.pagerDirection == ReaderDirection.RIGHT_TO_LEFT,
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backgroundDecoration: const BoxDecoration(color: Colors.black),
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loadingBuilder: (context, event) => LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return buildLoading(constraints.maxWidth, constraints.maxHeight);
},
),
pageController: _pageController,
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onPageChanged: _onGalleryPageChange,
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itemCount: widget.struct.images.length,
builder: (BuildContext context, int index) {
var item = widget.struct.images[index];
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if (item.pkzFile != null) {
return PhotoViewGalleryPageOptions(
imageProvider:
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PkzImageProvider(item.pkzFile!.pkzPath, item.pkzFile!.path),
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errorBuilder: (b, e, s) {
print("$e,$s");
return LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return buildError(
constraints.maxWidth, constraints.maxHeight);
},
);
},
filterQuality: FilterQuality.high,
);
}
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if (item.downloadLocalPath != null) {
return PhotoViewGalleryPageOptions(
imageProvider:
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ResourceDownloadFileImageProvider(item.downloadLocalPath!),
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errorBuilder: (b, e, s) {
print("$e,$s");
return LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return buildError(
constraints.maxWidth, constraints.maxHeight);
},
);
},
filterQuality: FilterQuality.high,
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);
}
return PhotoViewGalleryPageOptions(
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imageProvider:
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ResourceRemoteImageProvider(item.fileServer, item.path),
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errorBuilder: (b, e, s) {
print("$e,$s");
return LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return buildError(constraints.maxWidth, constraints.maxHeight);
},
);
},
filterQuality: FilterQuality.high,
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);
},
allowImplicitScrolling: true,
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);
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gallery = GestureDetector(
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child: gallery,
onLongPress: () async {
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if (_current >= 0 && _current < widget.struct.images.length) {
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var item = widget.struct.images[_current];
if (item.pkzFile != null) {
return;
}
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Future<String> load() async {
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var item = widget.struct.images[_current];
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if (item.downloadLocalPath != null) {
return method.downloadImagePath(item.downloadLocalPath!);
}
var data = await method.remoteImageData(item.fileServer, item.path);
return data.finalPath;
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}
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String? choose =
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await chooseListDialog(context, '请选择', ['预览图片', '保存图片']);
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switch (choose) {
case '预览图片':
try {
var file = await load();
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Navigator.of(context).push(mixRoute(
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builder: (context) => FilePhotoViewScreen(file),
));
} catch (e) {
defaultToast(context, "图片加载失败");
}
break;
case '保存图片':
try {
var file = await load();
saveImage(file, context);
} catch (e) {
defaultToast(context, "图片加载失败");
}
break;
}
}
},
);
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gallery = Container(
padding: EdgeInsets.only(
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top: widget.struct.fullScreen ? 0 : super._topBarHeight(),
bottom: widget.struct.fullScreen ? 0 : super._bottomBarHeight(),
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),
child: gallery,
);
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return Stack(
children: [
gallery,
_buildNextEpController(),
],
);
}
Widget _buildNextEpController() {
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if (super._fullscreenController() ||
_current < widget.struct.images.length - 1) return Container();
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return Align(
alignment: Alignment.bottomRight,
child: Material(
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color: Colors.transparent,
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child: Container(
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margin: const EdgeInsets.only(bottom: 10),
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padding:
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const EdgeInsets.only(left: 10, right: 10, top: 4, bottom: 4),
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decoration: const BoxDecoration(
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borderRadius: BorderRadius.only(
topLeft: Radius.circular(10),
bottomLeft: Radius.circular(10),
),
color: Color(0x88000000),
),
child: GestureDetector(
onTap: () {
if (_hasNextEp()) {
_onNextAction();
} else {
Navigator.of(context).pop();
}
},
child: Text(_hasNextEp() ? '下一章' : '结束阅读',
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style: const TextStyle(color: Colors.white)),
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),
),
),
);
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}
}
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///////////////////////////////////////////////////////////////////////////////