93 lines
2.8 KiB
Dart
93 lines
2.8 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:stream_chat_flutter/src/extension.dart';
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import 'package:stream_chat_flutter/stream_chat_flutter.dart';
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/// It shows the current [Channel] name using a [Text] widget.
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///
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/// The widget uses a [StreamBuilder] to render the channel information
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/// image as soon as it updates.
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@Deprecated("Use 'StreamChannelName' instead")
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class ChannelName extends StatelessWidget {
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/// Instantiate a new ChannelName
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const ChannelName({
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super.key,
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this.textStyle,
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this.textOverflow = TextOverflow.ellipsis,
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});
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/// The style of the text displayed
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final TextStyle? textStyle;
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/// How visual overflow should be handled.
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final TextOverflow textOverflow;
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@override
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Widget build(BuildContext context) {
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final client = StreamChat.of(context);
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final channel = StreamChannel.of(context).channel;
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assert(channel.state != null, 'Channel ${channel.id} is not initialized');
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return BetterStreamBuilder<String>(
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stream: channel.nameStream,
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initialData: channel.name,
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builder: (context, channelName) => Text(
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channelName,
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style: textStyle,
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overflow: textOverflow,
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),
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noDataBuilder: (context) => _generateName(
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client.currentUser!,
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channel.state!.members,
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),
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);
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}
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Widget _generateName(
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User currentUser,
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List<Member> members,
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) =>
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LayoutBuilder(
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builder: (context, constraints) {
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var channelName = context.translations.noTitleText;
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final otherMembers = members.where(
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(member) => member.userId != currentUser.id,
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);
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if (otherMembers.isNotEmpty) {
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if (otherMembers.length == 1) {
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final user = otherMembers.first.user;
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if (user != null) {
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channelName = user.name;
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}
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} else {
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final maxWidth = constraints.maxWidth;
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final maxChars = maxWidth / (textStyle?.fontSize ?? 1);
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var currentChars = 0;
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final currentMembers = <Member>[];
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otherMembers.forEach((element) {
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final newLength =
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currentChars + (element.user?.name.length ?? 0);
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if (newLength < maxChars) {
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currentChars = newLength;
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currentMembers.add(element);
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}
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});
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final exceedingMembers =
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otherMembers.length - currentMembers.length;
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channelName =
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'${currentMembers.map((e) => e.user?.name).join(', ')} '
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'${exceedingMembers > 0 ? '+ $exceedingMembers' : ''}';
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}
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}
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return Text(
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channelName,
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style: textStyle,
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overflow: textOverflow,
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);
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},
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);
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}
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