Can filter playlist

lib/ui/music_player.dart

@@ -45,6 +45,9 @@ class _MusicPlayerState extends State<MusicPlayer> {
 
   var _showPlaylist = true;
 
+  final _filterController = fluent.TextEditingController();
+  MusicsList? _filteredList;
+
   MusicEntry get currMusic {
     if (currMusicPos < 0) currMusicPos = 0;
 
@@ -113,6 +116,20 @@ class _MusicPlayerState extends State<MusicPlayer> {
 
   void _updatePosition(Duration d) => _videoPlayerController?.seekTo(d);
 
+  void _refreshFilteredList() {
+    final value = _filterController.value.text.toLowerCase();
+    if (value.isEmpty) {
+      setState(() => _filteredList = null);
+      return;
+    }
+
+    setState(() {
+      _filteredList = widget.musicsList
+          .where((m) => m.fullName.toLowerCase().contains(value))
+          .toList();
+    });
+  }
+
   @override
   void dispose() {
     super.dispose();
@@ -171,6 +188,7 @@ class _MusicPlayerState extends State<MusicPlayer> {
             _showPlaylist
                 ? SizedBox(
                     width: playlistWidth,
+                    height: constraints.maxHeight,
                     child: _buildPlaylistPane(),
                   )
                 : Container(),
@@ -261,17 +279,28 @@ class _MusicPlayerState extends State<MusicPlayer> {
       );
 
   Widget _buildPlaylistPane() {
-    return ListView.builder(
-      itemBuilder: (c, i) {
-        final music = widget.musicsList[i];
-        return ListTile(
-          title: Text(music.title),
-          subtitle: Text(music.artist),
-          selected: currMusic == music,
-          onTap: () => _playMusic(music),
-        );
-      },
-      itemCount: widget.musicsList.length,
+    return Column(
+      children: [
+        fluent.TextBox(
+          controller: _filterController,
+          placeholder: "Filter list...",
+          onChanged: (s) => _refreshFilteredList(),
+        ),
+        Flexible(
+          child: ListView.builder(
+            itemBuilder: (c, i) {
+              final music = (_filteredList ?? widget.musicsList)[i];
+              return ListTile(
+                title: Text(music.title),
+                subtitle: Text(music.artist),
+                selected: currMusic == music,
+                onTap: () => _playMusic(music),
+              );
+            },
+            itemCount: (_filteredList ?? widget.musicsList).length,
+          ),
+        ),
+      ],
     );
   }
 }