681 lines
20 KiB
Dart
681 lines
20 KiB
Dart
import 'dart:io';
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import 'package:file_picker/file_picker.dart';
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import 'package:flutter/cupertino.dart';
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import 'package:flutter/material.dart';
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import 'package:image_picker/image_picker.dart';
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import 'package:keyboard_visibility/keyboard_visibility.dart';
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import 'package:stream_chat/stream_chat.dart';
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import 'package:stream_chat_flutter/src/message_list_view.dart';
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import 'package:stream_chat_flutter/src/stream_chat_theme.dart';
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import '../stream_chat_flutter.dart';
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import 'stream_channel.dart';
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/// Inactive state
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/// 
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/// 
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/// Focused state
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/// 
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/// 
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///
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/// Widget used to enter the message and add attachments
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///
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/// ```dart
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/// class ChannelPage extends StatelessWidget {
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/// const ChannelPage({
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/// Key key,
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/// }) : super(key: key);
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///
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/// @override
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/// Widget build(BuildContext context) {
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/// return Scaffold(
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/// appBar: ChannelHeader(),
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/// body: Column(
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/// children: <Widget>[
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/// Expanded(
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/// child: MessageListView(
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/// threadBuilder: (_, parentMessage) {
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/// return ThreadPage(
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/// parent: parentMessage,
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/// );
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/// },
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/// ),
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/// ),
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/// MessageInput(),
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/// ],
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/// ),
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/// );
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/// }
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/// }
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/// ```
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///
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/// You usually put this widget in the same page of a [MessageListView] as the bottom widget.
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///
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/// The widget renders the ui based on the first ancestor of type [StreamChatTheme].
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/// Modify it to change the widget appearance.
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class MessageInput extends StatefulWidget {
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MessageInput({
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Key key,
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this.onMessageSent,
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this.parentMessage,
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this.editMessage,
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}) : super(key: key);
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/// Message to edit
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final Message editMessage;
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/// Function called after sending the message
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final void Function(Message) onMessageSent;
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/// Parent message in case of a thread
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final Message parentMessage;
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@override
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_MessageInputState createState() => _MessageInputState();
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}
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class _MessageInputState extends State<MessageInput> {
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final List<_SendingAttachment> _attachments = [];
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final _focusNode = FocusNode();
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TextEditingController _textController;
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bool _messageIsPresent = false;
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bool _typingStarted = false;
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OverlayEntry _commandsOverlay;
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@override
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Widget build(BuildContext context) {
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return SafeArea(
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child: Padding(
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padding: const EdgeInsets.all(8.0),
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child: Stack(
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overflow: Overflow.visible,
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children: <Widget>[
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_buildBorder(context),
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Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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_buildAttachments(),
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_buildTextField(context),
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],
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),
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],
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),
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),
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);
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}
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Flex _buildTextField(BuildContext context) {
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return Flex(
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direction: Axis.horizontal,
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children: <Widget>[
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_buildAttachmentButton(),
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_buildTextInput(context),
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_animateSendButton(context),
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],
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);
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}
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AnimatedCrossFade _animateSendButton(BuildContext context) {
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print(
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'_messageIsPresent || _attachments.isNotEmpty: ${_messageIsPresent || _attachments.isNotEmpty}');
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print('_attachments.isNotEmpty: ${_attachments.isNotEmpty}');
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print('_messageIsPresent: ${_messageIsPresent}');
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return AnimatedCrossFade(
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crossFadeState: (_messageIsPresent || _attachments.isNotEmpty)
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? CrossFadeState.showFirst
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: CrossFadeState.showSecond,
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firstChild: _buildSendButton(context),
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secondChild: SizedBox(),
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duration: Duration(milliseconds: 300),
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alignment: Alignment.center,
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);
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}
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Expanded _buildTextInput(BuildContext context) {
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return Expanded(
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child: TextField(
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minLines: null,
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maxLines: null,
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onSubmitted: (_) {
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_sendMessage(context);
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},
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controller: _textController,
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focusNode: _focusNode,
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onChanged: (s) {
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StreamChannel.of(context).channel.keyStroke();
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setState(() {
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_messageIsPresent = s.trim().isNotEmpty;
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});
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_commandsOverlay?.remove();
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_commandsOverlay = null;
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if (s.startsWith('/')) {
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_commandsOverlay = _buildOverlayEntry();
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Overlay.of(context).insert(_commandsOverlay);
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}
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},
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onTap: () {
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setState(() {
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_typingStarted = true;
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});
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},
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style: Theme.of(context).textTheme.body1,
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autofocus: false,
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decoration: InputDecoration(
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hintText: 'Write a message',
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prefixText: ' ',
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border: InputBorder.none,
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),
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),
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);
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}
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Positioned _buildBorder(BuildContext context) {
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return Positioned.fill(
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child: Container(
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width: MediaQuery.of(context).size.width,
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padding: EdgeInsets.all(2),
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(10.0),
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gradient: _getGradient(context),
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),
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child: Container(
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(10.0),
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),
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child: Container(
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decoration: BoxDecoration(
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color: StreamChatTheme.of(context).channelTheme.inputBackground,
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borderRadius: BorderRadius.circular(10.0),
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border: Border.all(
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color: _typingStarted
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? Colors.transparent
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: Colors.black.withOpacity(.2)),
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),
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),
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),
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),
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);
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}
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OverlayEntry _buildOverlayEntry() {
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final text = _textController.text;
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final commands = StreamChannel.of(context)
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.channel
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.config
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.commands
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.where((c) => c.name.startsWith(text.replaceFirst('/', '')))
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.toList();
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RenderBox renderBox = context.findRenderObject();
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final size = renderBox.size;
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final offset = renderBox.localToGlobal(Offset.zero);
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return OverlayEntry(builder: (_) {
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return Positioned(
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top: offset.dy - size.height,
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left: 0,
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right: 0,
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child: Material(
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color: StreamChatTheme.of(context).primaryColor,
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child: Flex(
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mainAxisSize: MainAxisSize.min,
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direction: Axis.vertical,
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children: <Widget>[
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ListView(
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padding: const EdgeInsets.all(0),
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shrinkWrap: true,
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children: commands
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.map((c) => ListTile(
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title: Text.rich(
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TextSpan(
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text: '${c.name}',
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style: TextStyle(fontWeight: FontWeight.bold),
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children: [
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TextSpan(
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text: ' ${c.args}',
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style: TextStyle(
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fontWeight: FontWeight.w300,
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),
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),
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],
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),
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),
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subtitle: Text(c.description),
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onTap: () {
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_setCommand(c);
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},
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))
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.toList(),
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),
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],
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),
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),
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);
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});
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}
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void _setCommand(Command c) {
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setState(() {
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_textController.value = TextEditingValue(
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text: '/${c.name} ',
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selection: TextSelection.fromPosition(
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TextPosition(
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offset: c.name.length + 2,
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),
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),
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);
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});
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_commandsOverlay?.remove();
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_commandsOverlay = null;
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}
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Gradient _getGradient(BuildContext context) {
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if (_typingStarted) {
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if (widget.editMessage == null) {
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return StreamChatTheme.of(context).channelTheme.inputGradient;
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}
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return LinearGradient(
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colors: [Colors.lightGreen, Colors.green],
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);
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} else {
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return null;
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}
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}
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Widget _buildAttachments() {
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return Wrap(
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direction: Axis.horizontal,
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children: _attachments
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.map(
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(attachment) => Padding(
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padding: const EdgeInsets.all(8.0),
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child: ClipRRect(
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borderRadius: BorderRadius.circular(10),
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child: Stack(
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children: <Widget>[
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Container(
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height: 50,
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width: 50,
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child: _buildAttachment(attachment),
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),
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Positioned(
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height: 16,
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width: 16,
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top: 4,
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right: 4,
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child: RawMaterialButton(
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(16),
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),
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elevation: 0,
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highlightElevation: 0,
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focusElevation: 0,
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disabledElevation: 0,
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hoverElevation: 0,
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onPressed: () {
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setState(() {
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_attachments.remove(attachment);
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});
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},
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fillColor: Colors.white.withOpacity(.5),
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child: Center(
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child: Icon(
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Icons.close,
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size: 15,
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color: Colors.black,
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),
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),
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),
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),
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attachment.uploaded
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? SizedBox()
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: Positioned.fill(
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child: Center(
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child: Padding(
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padding: const EdgeInsets.all(16.0),
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child: CircularProgressIndicator(),
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),
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),
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),
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],
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),
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),
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),
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)
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.toList(),
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);
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}
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Widget _buildAttachment(_SendingAttachment attachment) {
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switch (attachment.type) {
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case FileType.IMAGE:
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return attachment.file != null
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? Image.file(
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attachment.file,
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fit: BoxFit.cover,
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)
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: Image.network(
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attachment.url,
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fit: BoxFit.cover,
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);
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break;
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case FileType.VIDEO:
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return Container(
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child: Icon(Icons.videocam),
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color: Colors.black26,
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);
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break;
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default:
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return Container(
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child: Icon(Icons.insert_drive_file),
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color: Colors.black26,
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);
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}
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}
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Material _buildAttachmentButton() {
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return Material(
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clipBehavior: Clip.hardEdge,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(32),
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),
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color: Colors.transparent,
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child: IconButton(
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onPressed: () {
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showModalBottomSheet(
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clipBehavior: Clip.hardEdge,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.only(
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topLeft: Radius.circular(32),
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topRight: Radius.circular(32),
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),
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),
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context: context,
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builder: (_) {
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return Column(
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mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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ListTile(
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title: Text(
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'Add a file',
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style: TextStyle(
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fontWeight: FontWeight.bold,
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),
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),
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),
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ListTile(
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leading: Icon(Icons.image),
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title: Text('Upload a photo'),
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onTap: () {
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_pickFile(FileType.IMAGE, false);
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Navigator.pop(context);
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},
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),
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ListTile(
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leading: Icon(Icons.video_library),
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title: Text('Upload a video'),
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onTap: () {
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_pickFile(FileType.VIDEO, false);
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Navigator.pop(context);
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},
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),
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ListTile(
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leading: Icon(Icons.camera_alt),
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title: Text('Photo from camera'),
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onTap: () {
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ImagePicker.pickImage(source: ImageSource.camera);
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_pickFile(FileType.IMAGE, true);
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Navigator.pop(context);
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},
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),
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ListTile(
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leading: Icon(Icons.videocam),
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title: Text('Video from camera'),
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onTap: () {
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_pickFile(FileType.VIDEO, true);
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Navigator.pop(context);
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},
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),
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ListTile(
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leading: Icon(Icons.insert_drive_file),
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title: Text('Upload a file'),
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onTap: () {
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_pickFile(FileType.ANY, false);
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Navigator.pop(context);
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},
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),
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],
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);
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});
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},
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icon: Icon(
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Icons.add_circle_outline,
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),
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),
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);
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}
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void _pickFile(FileType type, bool camera) async {
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File file;
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if (camera) {
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if (type == FileType.IMAGE) {
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file = await ImagePicker.pickImage(source: ImageSource.camera);
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} else if (type == FileType.VIDEO) {
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file = await ImagePicker.pickVideo(source: ImageSource.camera);
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}
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} else {
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file = await FilePicker.getFile(type: type);
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}
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final channel = StreamChannel.of(context).channel;
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final bytes = await file.readAsBytes();
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final attachment = _SendingAttachment(
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file: file,
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type: type,
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);
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setState(() {
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_attachments.add(attachment);
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});
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final res = await channel.sendFile(
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MultipartFile.fromBytes(
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bytes,
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filename: file.path.split('/').last,
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),
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);
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attachment.url = res.file;
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setState(() {
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attachment.uploaded = true;
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});
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}
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Widget _buildSendButton(BuildContext context) {
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return IconTheme(
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data:
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StreamChatTheme.of(context).channelTheme.messageInputButtonIconTheme,
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child: Material(
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clipBehavior: Clip.hardEdge,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(32),
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),
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color: Colors.transparent,
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child: IconButton(
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onPressed: () {
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_sendMessage(context);
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},
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icon: Icon(
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Icons.send,
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),
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),
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),
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);
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}
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void _sendMessage(BuildContext context) {
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final text = _textController.text.trim();
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if (text.isEmpty && _attachments.isEmpty) {
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return;
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}
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final attachments = List<_SendingAttachment>.from(_attachments);
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_textController.clear();
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_attachments.clear();
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setState(() {
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_messageIsPresent = false;
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_typingStarted = false;
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});
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_commandsOverlay?.remove();
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_commandsOverlay = null;
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FocusScope.of(context).unfocus();
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if (widget.editMessage != null) {
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final message = widget.editMessage.copyWith(
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parentId: widget.parentMessage?.id,
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text: text,
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attachments: widget.editMessage.attachments
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.where((attachment) => attachment.type == 'giphy')
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.toList() +
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_getAttachments(attachments).toList(),
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);
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StreamChat.of(context).client.updateMessage(message).then((_) {
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if (widget.onMessageSent != null) {
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widget.onMessageSent(message);
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}
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});
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} else {
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final message = Message(
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parentId: widget.parentMessage?.id,
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text: text,
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attachments: _getAttachments(attachments).toList(),
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);
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StreamChannel.of(context).channel.sendMessage(message).then((_) {
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if (widget.onMessageSent != null) {
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widget.onMessageSent(message);
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}
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});
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}
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}
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Iterable<Attachment> _getAttachments(List<_SendingAttachment> attachments) {
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return attachments.map((attachment) {
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String type;
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switch (attachment.type) {
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case FileType.IMAGE:
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type = 'image';
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break;
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case FileType.VIDEO:
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type = 'video';
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break;
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default:
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type = 'file';
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}
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return Attachment(
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imageUrl: attachment.type == FileType.IMAGE ? attachment.url : null,
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assetUrl: attachment.url,
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type: type,
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);
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});
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}
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int _keyboardListener;
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|
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@override
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void initState() {
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super.initState();
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_keyboardListener =
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KeyboardVisibilityNotification().addNewListener(onHide: () {
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if (_commandsOverlay != null) {
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_commandsOverlay.remove();
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}
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}, onShow: () {
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if (_commandsOverlay != null) {
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if (_textController.text.startsWith('/')) {
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WidgetsBinding.instance.addPostFrameCallback((_) {
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_commandsOverlay = _buildOverlayEntry();
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Overlay.of(context).insert(_commandsOverlay);
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});
|
|
}
|
|
}
|
|
});
|
|
|
|
if (widget.editMessage != null) {
|
|
_textController = TextEditingController(text: widget.editMessage.text);
|
|
|
|
_typingStarted = true;
|
|
_messageIsPresent = true;
|
|
|
|
widget.editMessage.attachments.forEach((attachment) {
|
|
if (attachment.type == 'image') {
|
|
_attachments.add(_SendingAttachment(
|
|
type: FileType.IMAGE,
|
|
url: attachment.imageUrl,
|
|
uploaded: true,
|
|
));
|
|
} else if (attachment.type == 'video') {
|
|
_attachments.add(_SendingAttachment(
|
|
type: FileType.VIDEO,
|
|
url: attachment.assetUrl,
|
|
uploaded: true,
|
|
));
|
|
} else if (attachment.type != 'giphy') {
|
|
_attachments.add(_SendingAttachment(
|
|
type: FileType.ANY,
|
|
url: attachment.assetUrl,
|
|
uploaded: true,
|
|
));
|
|
}
|
|
});
|
|
} else {
|
|
_textController = TextEditingController();
|
|
}
|
|
}
|
|
|
|
@override
|
|
void dispose() {
|
|
_commandsOverlay?.remove();
|
|
KeyboardVisibilityNotification().removeListener(_keyboardListener);
|
|
super.dispose();
|
|
}
|
|
|
|
bool _initialized = false;
|
|
@override
|
|
void didChangeDependencies() {
|
|
if (widget.editMessage != null && !_initialized) {
|
|
FocusScope.of(context).requestFocus(_focusNode);
|
|
_initialized = true;
|
|
}
|
|
super.didChangeDependencies();
|
|
}
|
|
}
|
|
|
|
class _SendingAttachment {
|
|
final File file;
|
|
final FileType type;
|
|
String url;
|
|
bool uploaded;
|
|
|
|
_SendingAttachment({
|
|
this.url,
|
|
this.file,
|
|
this.type,
|
|
this.uploaded = false,
|
|
});
|
|
}
|