fluffychat/lib/utils/fluffy_emoji_picker.dart
2022-08-14 17:22:16 +02:00

399 lines
12 KiB
Dart

// ignore_for_file: prefer_function_declarations_over_variables, implementation_imports
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:emoji_picker_flutter/emoji_picker_flutter.dart';
import 'package:emoji_picker_flutter/src/category_emoji.dart';
import 'package:emoji_picker_flutter/src/emoji_picker_internal_utils.dart';
import 'package:emoji_picker_flutter/src/emoji_skin_tones.dart';
import 'package:emoji_picker_flutter/src/emoji_view_state.dart';
import 'package:emoji_picker_flutter/src/triangle_shape.dart';
import 'package:emojis/emoji.dart' as emoji;
import 'package:matrix/matrix.dart';
import 'package:fluffychat/widgets/matrix.dart';
/// Default EmojiPicker Implementation - adjusted for FluffyChat
///
/// Copied and adjusted from: [DefaultEmojiPickerView]
class FluffyEmojiPickerView extends EmojiPickerBuilder {
/// Constructor
FluffyEmojiPickerView(Config config, EmojiViewState state)
: super(config, state);
@override
DefaultEmojiPickerViewState createState() => DefaultEmojiPickerViewState();
}
class DefaultEmojiPickerViewState extends State<FluffyEmojiPickerView>
with SingleTickerProviderStateMixin {
PageController? _pageController;
TabController? _tabController;
OverlayEntry? _overlay;
late final _scrollController = ScrollController();
late final _utils = EmojiPickerInternalUtils();
final int _skinToneCount = 6;
final double tabBarHeight = 46;
@override
void initState() {
var initCategory = widget.state.categoryEmoji.indexWhere(
(element) => element.category == widget.config.initCategory);
if (initCategory == -1) {
initCategory = 0;
}
_tabController = TabController(
initialIndex: initCategory,
length: widget.state.categoryEmoji.length,
vsync: this);
_pageController = PageController(initialPage: initCategory)
..addListener(_closeSkinToneDialog);
_scrollController.addListener(_closeSkinToneDialog);
super.initState();
}
@override
void dispose() {
_closeSkinToneDialog();
super.dispose();
}
void _closeSkinToneDialog() {
_overlay?.remove();
_overlay = null;
}
void _openSkinToneDialog(
Emoji emoji,
double emojiSize,
CategoryEmoji categoryEmoji,
int index,
) {
_overlay = _buildSkinToneOverlay(
emoji,
emojiSize,
categoryEmoji,
index,
);
Overlay.of(context)?.insert(_overlay!);
}
Widget _buildBackspaceButton() {
if (widget.state.onBackspacePressed != null) {
return Material(
type: MaterialType.transparency,
child: IconButton(
padding: const EdgeInsets.only(bottom: 2),
icon: Icon(
Icons.backspace,
color: widget.config.backspaceColor,
),
onPressed: () {
widget.state.onBackspacePressed!();
}),
);
}
return Container();
}
@override
Widget build(BuildContext context) {
return LayoutBuilder(
builder: (context, constraints) {
final emojiSize = widget.config.getEmojiSize(constraints.maxWidth);
return Container(
color: widget.config.bgColor,
child: Column(
children: [
Row(
children: [
Expanded(
child: SizedBox(
height: tabBarHeight,
child: TabBar(
labelColor: widget.config.iconColorSelected,
indicatorColor: widget.config.indicatorColor,
unselectedLabelColor: widget.config.iconColor,
controller: _tabController,
labelPadding: EdgeInsets.zero,
onTap: (index) {
_closeSkinToneDialog();
_pageController!.jumpToPage(index);
},
tabs: widget.state.categoryEmoji
.asMap()
.entries
.map<Widget>((item) =>
_buildCategory(item.key, item.value.category))
.toList(),
),
),
),
_buildBackspaceButton(),
],
),
Flexible(
child: PageView.builder(
itemCount: widget.state.categoryEmoji.length,
controller: _pageController,
onPageChanged: (index) {
_tabController!.animateTo(
index,
duration: widget.config.tabIndicatorAnimDuration,
);
},
itemBuilder: (context, index) =>
_buildPage(emojiSize, widget.state.categoryEmoji[index]),
),
),
],
),
);
},
);
}
Widget _buildCategory(int index, Category category) {
return Tab(
icon: Icon(
widget.config.getIconForCategory(category),
),
);
}
Widget _buildPage(double emojiSize, CategoryEmoji categoryEmoji) {
final matrix = Matrix.of(context);
// Display notice if recent has no entries yet
if (categoryEmoji.category == Category.RECENT) {
final recent = matrix.client.recentEmojis;
final sorted = recent.keys.toList()
..sort((a, b) => recent[b]!.compareTo(recent[a]!));
categoryEmoji.emoji = sorted
.map((char) => Emoji(emoji.Emoji.byChar(char)?.name ?? '', char))
.toList();
if (categoryEmoji.emoji.isEmpty) {
return _buildNoRecent();
}
}
// Build page normally
return GestureDetector(
onTap: _closeSkinToneDialog,
child: GridView.count(
scrollDirection: Axis.vertical,
physics: const ScrollPhysics(),
controller: _scrollController,
shrinkWrap: true,
primary: false,
padding: const EdgeInsets.all(0),
crossAxisCount: widget.config.columns,
mainAxisSpacing: widget.config.verticalSpacing,
crossAxisSpacing: widget.config.horizontalSpacing,
children: categoryEmoji.emoji.asMap().entries.map((item) {
final index = item.key;
final emoji = item.value;
final onPressed = () {
_closeSkinToneDialog();
matrix.client.addRecentEmoji(emoji.emoji);
widget.state.onEmojiSelected(categoryEmoji.category, emoji);
};
final onLongPressed = () {
if (!emoji.hasSkinTone || !widget.config.enableSkinTones) {
_closeSkinToneDialog();
return;
}
_closeSkinToneDialog();
_openSkinToneDialog(emoji, emojiSize, categoryEmoji, index);
};
return _buildButtonWidget(
onPressed: onPressed,
onLongPressed: onLongPressed,
child: _buildEmoji(
emojiSize,
categoryEmoji,
emoji,
widget.config.enableSkinTones,
),
);
}).toList(),
),
);
}
/// Build and display Emoji centered of its parent
Widget _buildEmoji(
double emojiSize,
CategoryEmoji categoryEmoji,
Emoji emoji,
bool showSkinToneIndicator,
) {
// FittedBox needed for display, font scale settings
return FittedBox(
fit: BoxFit.fill,
child: Stack(children: [
emoji.hasSkinTone && showSkinToneIndicator
? Positioned(
bottom: 0,
right: 0,
child: CustomPaint(
size: const Size(8, 8),
painter: TriangleShape(widget.config.skinToneIndicatorColor),
),
)
: Container(),
Text(
emoji.emoji,
textScaleFactor: 1.0,
style: TextStyle(
fontSize: emojiSize,
backgroundColor: Colors.transparent,
),
),
]),
);
}
/// Build different Button based on ButtonMode
Widget _buildButtonWidget({
required VoidCallback onPressed,
required VoidCallback onLongPressed,
required Widget child,
}) {
if (widget.config.buttonMode == ButtonMode.MATERIAL) {
return TextButton(
onPressed: onPressed,
onLongPress: onLongPressed,
style: ButtonStyle(
padding: MaterialStateProperty.all(EdgeInsets.zero),
minimumSize: MaterialStateProperty.all(Size.zero),
tapTargetSize: MaterialTapTargetSize.shrinkWrap,
),
child: child,
);
}
return GestureDetector(
onLongPress: onLongPressed,
child: CupertinoButton(
padding: EdgeInsets.zero,
onPressed: onPressed,
child: child,
),
);
}
/// Build Widget for when no recent emoji are available
Widget _buildNoRecent() {
return Center(
child: Text(
widget.config.noRecentsText,
style: widget.config.noRecentsStyle,
textAlign: TextAlign.center,
));
}
/// Overlay for SkinTone
OverlayEntry _buildSkinToneOverlay(
Emoji emoji,
double emojiSize,
CategoryEmoji categoryEmoji,
int index,
) {
// Calculate position of emoji in the grid
final row = index ~/ widget.config.columns;
final column = index % widget.config.columns;
// Calculate position for skin tone dialog
final renderBox = context.findRenderObject() as RenderBox;
final offset = renderBox.localToGlobal(Offset.zero);
final emojiSpace = renderBox.size.width / widget.config.columns;
final topOffset = emojiSpace;
final leftOffset = _getLeftOffset(emojiSpace, column);
final left = offset.dx + column * emojiSpace + leftOffset;
final top = tabBarHeight +
offset.dy +
row * emojiSpace -
_scrollController.offset -
topOffset;
// Generate other skintone options
final skinTonesEmoji = SkinTone.values
.map((skinTone) => _utils.applySkinTone(emoji, skinTone))
.toList();
return OverlayEntry(
builder: (context) => Positioned(
left: left,
top: top,
child: Material(
elevation: 4.0,
child: Container(
padding: const EdgeInsets.symmetric(vertical: 4.0),
color: widget.config.skinToneDialogBgColor,
child: Row(
children: [
_buildSkinToneEmoji(
categoryEmoji, emoji, emojiSpace, emojiSize),
_buildSkinToneEmoji(
categoryEmoji, skinTonesEmoji[0], emojiSpace, emojiSize),
_buildSkinToneEmoji(
categoryEmoji, skinTonesEmoji[1], emojiSpace, emojiSize),
_buildSkinToneEmoji(
categoryEmoji, skinTonesEmoji[2], emojiSpace, emojiSize),
_buildSkinToneEmoji(
categoryEmoji, skinTonesEmoji[3], emojiSpace, emojiSize),
_buildSkinToneEmoji(
categoryEmoji, skinTonesEmoji[4], emojiSpace, emojiSize),
],
),
),
),
),
);
}
// Build Emoji inside skin tone dialog
Widget _buildSkinToneEmoji(
CategoryEmoji categoryEmoji,
Emoji emoji,
double width,
double emojiSize,
) {
return SizedBox(
width: width,
height: width,
child: _buildButtonWidget(
onPressed: () {
widget.state.onEmojiSelected(categoryEmoji.category, emoji);
_closeSkinToneDialog();
},
onLongPressed: () {},
child: _buildEmoji(emojiSize, categoryEmoji, emoji, false),
),
);
}
// Calucates the offset from the middle of selected emoji to the left side
// of the skin tone dialog
// Case 1: Selected Emoji is close to left border and offset needs to be
// reduced
// Case 2: Selected Emoji is close to right border and offset needs to be
// larger than half of the whole width
// Case 3: Enough space to left and right border and offset can be half
// of whole width
double _getLeftOffset(double emojiWidth, int column) {
final remainingColumns =
widget.config.columns - (column + 1 + (_skinToneCount ~/ 2));
if (column >= 0 && column < 3) {
return -1 * column * emojiWidth;
} else if (remainingColumns < 0) {
return -1 *
((_skinToneCount ~/ 2 - 1) + -1 * remainingColumns) *
emojiWidth;
}
return -1 * ((_skinToneCount ~/ 2) * emojiWidth) + emojiWidth / 2;
}
}