feat(home): 实现按住说话功能

apps/lib/features/home/ui/screens/home_screen.dart

@@ -1,7 +1,7 @@
 import 'dart:io';
-import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:go_router/go_router.dart';
 import 'package:image_picker/image_picker.dart';
@@ -40,6 +40,7 @@ const _attachmentPreviewRadius = 10.0;
 const _attachmentPreviewGap = 8.0;
 const _inputActionButtonKey = ValueKey('home_input_action_button');
 const _inputActionIconKey = ValueKey('home_input_action_icon');
+const _holdToSpeakKey = ValueKey('home_hold_to_speak_button');
 
 /// 颜色常量
 const _chatBgColor = AppColors.slate50;
@@ -76,6 +77,7 @@ class _HomeScreenState extends State<HomeScreen>
   late final Future<void> Function(String transcript) _autoSendTranscript;
   late final AnimationController _listeningAnimationController;
   bool _isRecording = false;
+  bool _isHoldToSpeakMode = false;
   bool _isTranscribing = false;
   int _unreadCount = 0;
   final List<XFile> _selectedImages = [];
@@ -86,7 +88,7 @@ class _HomeScreenState extends State<HomeScreen>
   void initState() {
     super.initState();
     _messageController.addListener(_onMessageChanged);
-    _chatBloc = widget.chatBloc ?? ChatBloc();
+    _chatBloc = widget.chatBloc ?? ChatBloc(apiClient: sl());
     _voiceRecorder = widget.voiceRecorder ?? RecordVoiceRecorder();
     _inboxApi = sl<InboxApi>();
     _transcribeAudio =
@@ -710,113 +712,235 @@ class _HomeScreenState extends State<HomeScreen>
   }
 
   Widget _buildInputContainer(BuildContext context, ChatState state) {
-    final isWaitingAgent =
-        state.isWaitingFirstToken || state.isStreaming || state.isCancelling;
     return Container(
       padding: const EdgeInsets.all(_inputPadding),
       color: _chatBgColor,
-      child: Row(
-        crossAxisAlignment: CrossAxisAlignment.center,
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
         children: [
-          GestureDetector(
-            onTap: _isRecording
-                ? _stopRecording
-                : () => _showBottomSheet(context),
-            child: Container(
-              width: 36,
-              height: 36,
-              decoration: BoxDecoration(
-                color: AppColors.white,
-                shape: BoxShape.circle,
-                border: Border.all(color: AppColors.slate300),
-              ),
-              child: Icon(
-                _isRecording ? LucideIcons.square : LucideIcons.plus,
-                size: 20,
-                color: _isRecording ? AppColors.red600 : AppColors.slate500,
-              ),
-            ),
-          ),
-          const SizedBox(width: 8),
-          Expanded(
-            child: Container(
-              constraints: const BoxConstraints(minHeight: _inputMinHeight),
-              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
-              decoration: BoxDecoration(
-                color: Colors.transparent,
-                borderRadius: BorderRadius.circular(_inputRadius),
-                border: Border.all(color: AppColors.slate300),
-              ),
-              child: Row(
-                crossAxisAlignment: CrossAxisAlignment.center,
-                children: [
-                  Expanded(
-                    child: _isRecording
-                        ? _buildListeningIndicator()
-                        : _isTranscribing
-                        ? _buildTranscribingIndicator()
-                        : TextField(
-                            controller: _messageController,
-                            minLines: 1,
-                            maxLines: 3,
-                            decoration: const InputDecoration(
-                              hintText: '输入消息...',
-                              border: InputBorder.none,
-                              enabledBorder: InputBorder.none,
-                              focusedBorder: InputBorder.none,
-                              disabledBorder: InputBorder.none,
-                              errorBorder: InputBorder.none,
-                              focusedErrorBorder: InputBorder.none,
-                              isDense: true,
-                              contentPadding: EdgeInsets.zero,
-                              filled: false,
-                            ),
-                            onSubmitted: (_) => _sendMessage(context),
-                          ),
+          Row(
+            crossAxisAlignment: CrossAxisAlignment.center,
+            children: [
+              GestureDetector(
+                onTap: _isRecording
+                    ? _stopRecording
+                    : () => _showBottomSheet(context),
+                child: Container(
+                  width: 36,
+                  height: 36,
+                  decoration: BoxDecoration(
+                    color: AppColors.white,
+                    shape: BoxShape.circle,
+                    border: Border.all(color: AppColors.slate300),
                   ),
-                  const SizedBox(width: 8),
-                  GestureDetector(
-                    key: _inputActionButtonKey,
-                    onTap: _isTranscribing
-                        ? null
-                        : _isRecording
-                        ? () => _stopRecording(autoSendAfterTranscribe: true)
-                        : isWaitingAgent
-                        ? () => _onStopGenerating(context)
-                        : _hasMessage
-                        ? () => _sendMessage(context)
-                        : _startRecording,
-                    child: _isTranscribing
-                        ? const SizedBox(
-                            width: _transcribingSpinnerSize,
-                            height: _transcribingSpinnerSize,
-                            child: CircularProgressIndicator(
-                              strokeWidth: _transcribingStrokeWidth,
-                              color: AppColors.blue600,
-                            ),
-                          )
-                        : Icon(
-                            key: _inputActionIconKey,
-                            isWaitingAgent
-                                ? LucideIcons.square
-                                : _isRecording || _hasMessage
-                                ? LucideIcons.send
-                                : LucideIcons.mic,
-                            size: _iconSize,
-                            color: isWaitingAgent || _isRecording || _hasMessage
-                                ? AppColors.blue600
-                                : AppColors.slate500,
-                          ),
+                  child: Icon(
+                    _isRecording ? LucideIcons.square : LucideIcons.plus,
+                    size: 20,
+                    color: _isRecording ? AppColors.red600 : AppColors.slate500,
                   ),
-                ],
+                ),
               ),
-            ),
+              const SizedBox(width: 8),
+              Expanded(
+                child: _isHoldToSpeakMode
+                    ? _buildHoldToSpeakButton()
+                    : _buildNormalInputField(state),
+              ),
+              const SizedBox(width: 8),
+              _buildRightActionButton(state),
+            ],
           ),
+          if (_isHoldToSpeakMode) ...[
+            const SizedBox(height: 8),
+            _buildHoldToSpeakHint(),
+          ],
         ],
       ),
     );
   }
 
+  Widget _buildHoldToSpeakButton() {
+    return GestureDetector(
+      key: _holdToSpeakKey,
+      onLongPressStart: (_) => _onHoldToSpeakStart(),
+      onLongPressEnd: (_) => _onHoldToSpeakEnd(),
+      onLongPressMoveUpdate: (details) => _onHoldToSpeakMoveUpdate(details),
+      child: Container(
+        constraints: const BoxConstraints(minHeight: _inputMinHeight),
+        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+        decoration: BoxDecoration(
+          color: Colors.transparent,
+          borderRadius: BorderRadius.circular(_inputRadius),
+          border: Border.all(color: AppColors.slate300),
+        ),
+        child: const Center(
+          child: Text(
+            '按住说话',
+            style: TextStyle(fontSize: 14, color: AppColors.slate500),
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildNormalInputField(ChatState state) {
+    return Container(
+      constraints: const BoxConstraints(minHeight: _inputMinHeight),
+      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+      decoration: BoxDecoration(
+        color: Colors.transparent,
+        borderRadius: BorderRadius.circular(_inputRadius),
+        border: Border.all(color: AppColors.slate300),
+      ),
+      child: Row(
+        crossAxisAlignment: CrossAxisAlignment.center,
+        children: [
+          Expanded(
+            child: _isRecording
+                ? _buildListeningIndicator()
+                : _isTranscribing
+                ? _buildTranscribingIndicator()
+                : TextField(
+                    controller: _messageController,
+                    minLines: 1,
+                    maxLines: 3,
+                    decoration: const InputDecoration(
+                      hintText: '输入消息...',
+                      border: InputBorder.none,
+                      enabledBorder: InputBorder.none,
+                      focusedBorder: InputBorder.none,
+                      disabledBorder: InputBorder.none,
+                      errorBorder: InputBorder.none,
+                      focusedErrorBorder: InputBorder.none,
+                      isDense: true,
+                      contentPadding: EdgeInsets.zero,
+                      filled: false,
+                    ),
+                    onSubmitted: (_) => _sendMessage(context),
+                  ),
+          ),
+          const SizedBox(width: 8),
+          _buildInputActionIcon(state),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildInputActionIcon(ChatState state) {
+    final isWaitingAgent =
+        state.isWaitingFirstToken || state.isStreaming || state.isCancelling;
+    return GestureDetector(
+      key: _inputActionButtonKey,
+      onTap: _isTranscribing
+          ? null
+          : _isRecording
+          ? () => _stopRecording(autoSendAfterTranscribe: true)
+          : isWaitingAgent
+          ? () => _onStopGenerating(context)
+          : _hasMessage
+          ? () => _sendMessage(context)
+          : _startRecording,
+      child: _isTranscribing
+          ? const SizedBox(
+              width: _transcribingSpinnerSize,
+              height: _transcribingSpinnerSize,
+              child: CircularProgressIndicator(
+                strokeWidth: _transcribingStrokeWidth,
+                color: AppColors.blue600,
+              ),
+            )
+          : Icon(
+              key: _inputActionIconKey,
+              isWaitingAgent
+                  ? LucideIcons.square
+                  : _isRecording || _hasMessage
+                  ? LucideIcons.send
+                  : LucideIcons.mic,
+              size: _iconSize,
+              color: isWaitingAgent || _isRecording || _hasMessage
+                  ? AppColors.blue600
+                  : AppColors.slate500,
+            ),
+    );
+  }
+
+  Widget _buildRightActionButton(ChatState state) {
+    return GestureDetector(
+      key: _inputActionButtonKey,
+      onTap: _isTranscribing
+          ? null
+          : _isHoldToSpeakMode
+          ? _toggleHoldToSpeakMode
+          : _startRecording,
+      child: _isTranscribing
+          ? const SizedBox(
+              width: _transcribingSpinnerSize,
+              height: _transcribingSpinnerSize,
+              child: CircularProgressIndicator(
+                strokeWidth: _transcribingStrokeWidth,
+                color: AppColors.blue600,
+              ),
+            )
+          : Icon(
+              key: _inputActionIconKey,
+              _isHoldToSpeakMode ? LucideIcons.keyboard : LucideIcons.activity,
+              size: _iconSize,
+              color: AppColors.slate500,
+            ),
+    );
+  }
+
+  Widget _buildHoldToSpeakHint() {
+    return Column(
+      children: [
+        if (_isRecording) _buildRecordingAnimation(),
+        const SizedBox(height: 4),
+        Text(
+          _isRecording ? '松开发送，上滑取消' : '按住说话',
+          style: const TextStyle(fontSize: 12, color: AppColors.slate500),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildRecordingAnimation() {
+    return _buildListeningIndicator();
+  }
+
+  void _toggleHoldToSpeakMode() {
+    setState(() {
+      _isHoldToSpeakMode = !_isHoldToSpeakMode;
+    });
+  }
+
+  void _onHoldToSpeakStart() {
+    HapticFeedback.lightImpact();
+    _startRecording();
+  }
+
+  void _onHoldToSpeakEnd() {
+    _stopRecording(autoSendAfterTranscribe: true);
+  }
+
+  void _onHoldToSpeakMoveUpdate(LongPressMoveUpdateDetails details) {
+    const cancelThreshold = -50.0;
+    if (details.offsetFromOrigin.dy < cancelThreshold) {
+      _cancelRecording();
+    }
+  }
+
+  Future<void> _cancelRecording() async {
+    try {
+      await _voiceRecorder.stop();
+      _listeningAnimationController.stop();
+    } catch (_) {}
+    if (!mounted) return;
+    setState(() {
+      _isRecording = false;
+    });
+    Toast.show(context, '已取消', type: ToastType.info);
+  }
+
   Future<void> _sendMessage(BuildContext context) async {
     final content = _messageController.text.trim();
     if (content.isEmpty && _selectedImages.isEmpty) return;