talksik/stream-chat-flutter
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

add support for messageListView header/footer

Browse Source 
Signed-off-by: Sahil Kumar <[email protected]>
This commit is contained in:
Sahil Kumar
2021-06-23 17:18:48 +05:30
parent 9796cb5cbb
commit db801f4cdb
1 changed files with 80 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files
packages/stream_chat_flutter/lib/src/message_list_view.dart
+80 -30
View File
@@ -1,3 +1,4 @@
// ignore_for_file: lines_longer_than_80_chars
import 'dart:async';
import 'dart:math';
@@ -147,6 +148,8 @@ class MessageListView extends StatefulWidget {
this.messageHighlightColor,
this.onShowMessage,
this.showConnectionStateTile = false,
this.headerBuilder,
this.footerBuilder,
this.loadingBuilder,
this.emptyBuilder,
this.systemMessageBuilder,
@@ -235,6 +238,12 @@ class MessageListView extends StatefulWidget {
/// Function called when messages are fetched
final Widget Function(BuildContext, List<Message>)? messageListBuilder;
///
final WidgetBuilder? headerBuilder;
///
final WidgetBuilder? footerBuilder;
/// Function used to build a loading widget
final WidgetBuilder? loadingBuilder;
@@ -407,6 +416,12 @@ class _MessageListViewState extends State<MessageListView> {
break;
}
final itemCount = messages.length + // total messages
2 + // top + bottom loading indicator
2 + // header + footer
1 // parent message
;
return InfoTile(
showMessage: widget.showConnectionStateTile && showStatus,
tileAnchor: Alignment.topCenter,
@@ -448,16 +463,49 @@ class _MessageListViewState extends State<MessageListView> {
itemScrollController: _scrollController,
reverse: true,
addAutomaticKeepAlives: false,
itemCount:
messages.length + 2 + (_isThreadConversation ? 1 : 0),
itemCount: itemCount,
// Item Count -> 8 (1 parent, 2 header+footer, 2 top+bottom, 3 messages)
// eg: |Type| rev(|Index(item)|) rev(|Index(separator)|) |Index(item)| |Index(separator)|
// ParentMessage -> 7 (count-1)
// Separator(ThreadSeparator) -> 6 (count-2)
// Header -> 6 (count-2)
// Separator(Header -> 8??52) -> 5 (count-3)
// TopLoader -> 5 (count-3)
// Separator(2||8) -> 4 (count-4)
// Message -> 4 (count-4)
// Separator(2||8) -> 3 (count-5)
// Message -> 3 (count-5)
// Separator(2||8) -> 2 (count-6)
// Message -> 2 (count-6)
// Separator(2||8) -> 1 (count-7)
// BottomLoader -> 1 (count-7)
// Separator(Footer -> 8??30) -> 0 (count-8)
// Footer -> 0 (count-8)
separatorBuilder: (context, i) {
if (i == messages.length) return const Offstage();
if (i == 0) return const SizedBox(height: 30);
if (i == messages.length + 1) {
if (i == itemCount - 2) {
if (widget.parentMessage == null) {
return const Offstage();
}
return _buildThreadSeparator();
}
if (i == itemCount - 3) {
if (widget.headerBuilder == null) {
return const SizedBox(height: 52);
}
return const SizedBox(height: 8);
}
if (i == 0) {
if (widget.footerBuilder == null) {
return const SizedBox(height: 30);
}
return const SizedBox(height: 8);
}
final message = messages[i];
if (i == 1 || i == itemCount - 4) return const Offstage();
final message = messages[i - 2];
final nextMessage = messages[i - 1];
if (!Jiffy(message.createdAt.toLocal()).isSame(
nextMessage.createdAt.toLocal(),
@@ -494,40 +542,51 @@ class _MessageListViewState extends State<MessageListView> {
return const SizedBox(height: 2);
},
itemBuilder: (context, i) {
if (i == messages.length + 2) {
if (widget.parentMessageBuilder != null) {
return widget.parentMessageBuilder!(
context,
widget.parentMessage,
);
} else {
return buildParentMessage(widget.parentMessage!);
}
if (i == itemCount - 1) {
if (widget.parentMessage == null) return const Offstage();
return widget.parentMessageBuilder?.call(
context,
widget.parentMessage,
) ??
buildParentMessage(widget.parentMessage!);
}
if (i == messages.length + 1) {
if (i == itemCount - 2) {
return widget.headerBuilder?.call(context) ??
const Offstage();
}
if (i == itemCount - 3) {
return _buildLoadingIndicator(
streamChannel!,
QueryDirection.top,
);
}
if (i == 0) {
if (i == 1) {
return _buildLoadingIndicator(
streamChannel!,
QueryDirection.bottom,
);
}
final message = messages[i - 1];
if (i == 0) {
return widget.footerBuilder?.call(context) ??
const Offstage();
}
final message = messages[i - 2];
Widget messageWidget;
if (i == 1) {
if (i == 2) {
messageWidget = _buildBottomMessage(
context,
message,
messages,
streamChannel!,
);
} else if (i == messages.length - 1) {
} else if (i == messages.length - 4) {
messageWidget = _buildTopMessage(
context,
message,
@@ -578,7 +637,6 @@ class _MessageListViewState extends State<MessageListView> {
child: Padding(
padding: const EdgeInsets.all(8),
child: Text(
// ignore: lines_longer_than_80_chars
'$replyCount ${replyCount == 1 ? 'Reply' : 'Replies'}',
textAlign: TextAlign.center,
style: _streamTheme.channelTheme.channelHeaderTheme.subtitle,
@@ -1238,15 +1296,7 @@ class _LoadingIndicator extends StatelessWidget {
),
),
builder: (context, data) {
if (!data) {
if (!isThreadConversation && direction == QueryDirection.top) {
return const SizedBox(
height: 52,
width: double.infinity,
);
}
return const Offstage();
}
if (!data) return const Offstage();
return const Center(
child: Padding(
padding: EdgeInsets.all(8),