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| 1 | +import 'package:flutter/material.dart'; |
| 2 | +import 'package:flutter/services.dart'; |
| 3 | +import 'package:intl/intl.dart'; |
| 4 | + |
| 5 | +import '../api/model/model.dart'; |
| 6 | +import 'content.dart'; |
| 7 | +import 'page.dart'; |
| 8 | +import 'clipboard.dart'; |
| 9 | +import 'store.dart'; |
| 10 | + |
| 11 | +// TODO: Add index of the image preview in the message, to not break if |
| 12 | +// there are multiple image previews with the same URL in the same |
| 13 | +// message. Maybe keep `src`, so that on exit the lightbox image doesn't |
| 14 | +// fly to an image preview with a different URL, following a message edit |
| 15 | +// while the lightbox was open. |
| 16 | +class _LightboxHeroTag { |
| 17 | + _LightboxHeroTag({required this.messageId, required this.src}); |
| 18 | + |
| 19 | + final int messageId; |
| 20 | + final String src; |
| 21 | + |
| 22 | + @override |
| 23 | + bool operator ==(Object other) { |
| 24 | + return other is _LightboxHeroTag && |
| 25 | + other.messageId == messageId && |
| 26 | + other.src == src; |
| 27 | + } |
| 28 | + |
| 29 | + @override |
| 30 | + int get hashCode => Object.hash('_LightboxHeroTag', messageId, src); |
| 31 | +} |
| 32 | + |
| 33 | +/// Builds a [Hero] from an image in the message list to the lightbox page. |
| 34 | +class LightboxHero extends StatelessWidget { |
| 35 | + const LightboxHero({ |
| 36 | + super.key, |
| 37 | + required this.message, |
| 38 | + required this.src, |
| 39 | + required this.child, |
| 40 | + }); |
| 41 | + |
| 42 | + final Message message; |
| 43 | + final String src; |
| 44 | + final Widget child; |
| 45 | + |
| 46 | + @override |
| 47 | + Widget build(BuildContext context) { |
| 48 | + return Hero( |
| 49 | + tag: _LightboxHeroTag(messageId: message.id, src: src), |
| 50 | + flightShuttleBuilder: ( |
| 51 | + BuildContext flightContext, |
| 52 | + Animation<double> animation, |
| 53 | + HeroFlightDirection flightDirection, |
| 54 | + BuildContext fromHeroContext, |
| 55 | + BuildContext toHeroContext, |
| 56 | + ) { |
| 57 | + final accountId = PerAccountStoreWidget.accountIdOf(fromHeroContext); |
| 58 | + |
| 59 | + // For a RealmContentNetworkImage shown during flight. |
| 60 | + return PerAccountStoreWidget(accountId: accountId, child: child); |
| 61 | + }, |
| 62 | + child: child, |
| 63 | + ); |
| 64 | + } |
| 65 | +} |
| 66 | + |
| 67 | +class _CopyLinkButton extends StatelessWidget { |
| 68 | + const _CopyLinkButton({required this.url}); |
| 69 | + |
| 70 | + final String url; |
| 71 | + |
| 72 | + @override |
| 73 | + Widget build(BuildContext context) { |
| 74 | + return IconButton( |
| 75 | + tooltip: 'Copy link', |
| 76 | + icon: const Icon(Icons.copy), |
| 77 | + onPressed: () async { |
| 78 | + // TODO(i18n) |
| 79 | + copyWithPopup(context: context, successContent: const Text('Link copied'), |
| 80 | + data: ClipboardData(text: url)); |
| 81 | + }); |
| 82 | + } |
| 83 | +} |
| 84 | + |
| 85 | +class _LightboxPage extends StatefulWidget { |
| 86 | + const _LightboxPage({ |
| 87 | + required this.routeEntranceAnimation, |
| 88 | + required this.message, |
| 89 | + required this.src, |
| 90 | + }); |
| 91 | + |
| 92 | + final Animation routeEntranceAnimation; |
| 93 | + final Message message; |
| 94 | + final String src; |
| 95 | + |
| 96 | + @override |
| 97 | + State<_LightboxPage> createState() => _LightboxPageState(); |
| 98 | +} |
| 99 | + |
| 100 | +class _LightboxPageState extends State<_LightboxPage> { |
| 101 | + // TODO: Animate entrance/exit of header and footer |
| 102 | + bool _headerFooterVisible = false; |
| 103 | + |
| 104 | + @override |
| 105 | + void initState() { |
| 106 | + super.initState(); |
| 107 | + widget.routeEntranceAnimation.addStatusListener(_handleRouteEntranceAnimationStatusChange); |
| 108 | + } |
| 109 | + |
| 110 | + @override |
| 111 | + void dispose() { |
| 112 | + widget.routeEntranceAnimation.removeStatusListener(_handleRouteEntranceAnimationStatusChange); |
| 113 | + super.dispose(); |
| 114 | + } |
| 115 | + |
| 116 | + void _handleRouteEntranceAnimationStatusChange(AnimationStatus status) { |
| 117 | + final entranceAnimationComplete = status == AnimationStatus.completed; |
| 118 | + setState(() { |
| 119 | + _headerFooterVisible = entranceAnimationComplete; |
| 120 | + }); |
| 121 | + } |
| 122 | + |
| 123 | + void _handleTap() { |
| 124 | + setState(() { |
| 125 | + _headerFooterVisible = !_headerFooterVisible; |
| 126 | + }); |
| 127 | + } |
| 128 | + |
| 129 | + @override |
| 130 | + Widget build(BuildContext context) { |
| 131 | + final themeData = Theme.of(context); |
| 132 | + |
| 133 | + final appBarBackgroundColor = Colors.grey.shade900.withOpacity(0.87); |
| 134 | + const appBarForegroundColor = Colors.white; |
| 135 | + |
| 136 | + PreferredSizeWidget? appBar; |
| 137 | + if (_headerFooterVisible) { |
| 138 | + // TODO: Format with e.g. "Yesterday at 4:47 PM" |
| 139 | + final timestampText = DateFormat |
| 140 | + .yMMMd(/* TODO(i18n): Pass selected language here, I think? */) |
| 141 | + .add_Hms() |
| 142 | + .format(DateTime.fromMillisecondsSinceEpoch(widget.message.timestamp * 1000)); |
| 143 | + |
| 144 | + appBar = AppBar( |
| 145 | + centerTitle: false, |
| 146 | + foregroundColor: appBarForegroundColor, |
| 147 | + backgroundColor: appBarBackgroundColor, |
| 148 | + |
| 149 | + // TODO: Show message author's avatar |
| 150 | + title: RichText( |
| 151 | + text: TextSpan( |
| 152 | + children: [ |
| 153 | + TextSpan( |
| 154 | + text: '${widget.message.sender_full_name}\n', |
| 155 | + |
| 156 | + // Restate default |
| 157 | + style: themeData.textTheme.titleLarge!.copyWith(color: appBarForegroundColor)), |
| 158 | + TextSpan( |
| 159 | + text: timestampText, |
| 160 | + |
| 161 | + // Make smaller, like a subtitle |
| 162 | + style: themeData.textTheme.titleSmall!.copyWith(color: appBarForegroundColor)), |
| 163 | + ]))); |
| 164 | + } |
| 165 | + |
| 166 | + Widget? bottomAppBar; |
| 167 | + if (_headerFooterVisible) { |
| 168 | + bottomAppBar = BottomAppBar( |
| 169 | + color: appBarBackgroundColor, |
| 170 | + child: Row( |
| 171 | + children: [ |
| 172 | + _CopyLinkButton(url: widget.src), |
| 173 | + // TODO: Share image |
| 174 | + // TODO: Download image |
| 175 | + ])); |
| 176 | + } |
| 177 | + |
| 178 | + return Theme( |
| 179 | + data: themeData.copyWith( |
| 180 | + iconTheme: themeData.iconTheme.copyWith(color: appBarForegroundColor)), |
| 181 | + child: Scaffold( |
| 182 | + backgroundColor: Colors.black, |
| 183 | + extendBody: true, // For the BottomAppBar |
| 184 | + extendBodyBehindAppBar: true, // For the AppBar |
| 185 | + appBar: appBar, |
| 186 | + body: MediaQuery( |
| 187 | + // Clobber the MediaQueryData prepared by Scaffold with one that's not |
| 188 | + // affected by the app bars. On this screen, the app bars are |
| 189 | + // translucent, dismissible overlays above the pan-zoom layer in the |
| 190 | + // Z direction, so the pan-zoom layer doesn't need avoid them in the Y |
| 191 | + // direction. |
| 192 | + data: MediaQuery.of(context), |
| 193 | + |
| 194 | + child: GestureDetector( |
| 195 | + behavior: HitTestBehavior.translucent, |
| 196 | + onTap: _handleTap, |
| 197 | + child: SizedBox.expand( |
| 198 | + child: InteractiveViewer( |
| 199 | + child: SafeArea( |
| 200 | + child: LightboxHero( |
| 201 | + message: widget.message, |
| 202 | + src: widget.src, |
| 203 | + child: RealmContentNetworkImage(widget.src, filterQuality: FilterQuality.medium))))))), |
| 204 | + bottomNavigationBar: bottomAppBar)); |
| 205 | + } |
| 206 | +} |
| 207 | + |
| 208 | +Route getLightboxRoute({ |
| 209 | + required BuildContext context, |
| 210 | + required Message message, |
| 211 | + required String src |
| 212 | +}) { |
| 213 | + return AccountPageRouteBuilder( |
| 214 | + context: context, |
| 215 | + fullscreenDialog: true, |
| 216 | + pageBuilder: ( |
| 217 | + BuildContext context, |
| 218 | + Animation<double> animation, |
| 219 | + Animation<double> secondaryAnimation, |
| 220 | + ) { |
| 221 | + // TODO: Drag down to close? |
| 222 | + return _LightboxPage(routeEntranceAnimation: animation, message: message, src: src); |
| 223 | + }, |
| 224 | + transitionsBuilder: ( |
| 225 | + BuildContext context, |
| 226 | + Animation<double> animation, |
| 227 | + Animation<double> secondaryAnimation, |
| 228 | + Widget child, |
| 229 | + ) { |
| 230 | + return FadeTransition( |
| 231 | + opacity: animation.drive(CurveTween(curve: Curves.easeIn)), |
| 232 | + child: child); |
| 233 | + }, |
| 234 | + ); |
| 235 | +} |
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