feat: 快进、快退、拖动时时间戳展示、关闭自动播放时处理、单p播放完成处理

lib/plugin/pl_player/widgets/play_pause_btn.dart

@@ -0,0 +1,89 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:media_kit/media_kit.dart';
+import 'package:pilipala/plugin/pl_player/index.dart';
+
+class PlayOrPauseButton extends StatefulWidget {
+  final double? iconSize;
+  final Color? iconColor;
+  final PlPlayerController? controller;
+
+  const PlayOrPauseButton({
+    super.key,
+    this.iconSize,
+    this.iconColor,
+    this.controller,
+  });
+
+  @override
+  PlayOrPauseButtonState createState() => PlayOrPauseButtonState();
+}
+
+class PlayOrPauseButtonState extends State<PlayOrPauseButton>
+    with SingleTickerProviderStateMixin {
+  late final AnimationController animation;
+
+  StreamSubscription<bool>? subscription;
+  late Player player;
+  bool isOpacity = false;
+
+  @override
+  void initState() {
+    super.initState();
+    player = widget.controller!.videoPlayerController!;
+    animation = AnimationController(
+      vsync: this,
+      value: player.state.playing ? 1 : 0,
+      duration: const Duration(milliseconds: 200),
+    );
+  }
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    subscription ??= player.stream.playing.listen((event) {
+      if (event) {
+        animation.forward().then((value) => {
+              isOpacity = true,
+            });
+      } else {
+        animation.reverse().then((value) => {isOpacity = false});
+      }
+      setState(() {});
+    });
+  }
+
+  @override
+  void dispose() {
+    animation.dispose();
+    subscription?.cancel();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      width: 34,
+      height: 34,
+      child: IconButton(
+        style: ButtonStyle(
+          padding: MaterialStateProperty.all(EdgeInsets.zero),
+        ),
+        onPressed: player.playOrPause,
+        color: Colors.white,
+        iconSize: 20,
+        // iconSize: widget.iconSize ?? _theme(context).buttonBarButtonSize,
+        // color: widget.iconColor ?? _theme(context).buttonBarButtonColor,
+        icon: AnimatedIcon(
+          progress: animation,
+          icon: AnimatedIcons.play_pause,
+          color: Colors.white,
+          size: 20,
+          // size: widget.iconSize ?? _theme(context).buttonBarButtonSize,
+          // color: widget.iconColor ?? _theme(context).buttonBarButtonColor,
+        ),
+      ),
+    );
+  }
+}