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/forward_seek.dart

@@ -0,0 +1,84 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+
+class ForwardSeekIndicator extends StatefulWidget {
+  final void Function(Duration) onChanged;
+  final void Function(Duration) onSubmitted;
+  const ForwardSeekIndicator({
+    Key? key,
+    required this.onChanged,
+    required this.onSubmitted,
+  }) : super(key: key);
+
+  @override
+  State<ForwardSeekIndicator> createState() => ForwardSeekIndicatorState();
+}
+
+class ForwardSeekIndicatorState extends State<ForwardSeekIndicator> {
+  Duration value = const Duration(seconds: 10);
+
+  Timer? timer;
+
+  @override
+  void initState() {
+    super.initState();
+    timer = Timer(const Duration(milliseconds: 400), () {
+      widget.onSubmitted.call(value);
+    });
+  }
+
+  void increment() {
+    timer?.cancel();
+    timer = Timer(const Duration(milliseconds: 400), () {
+      widget.onSubmitted.call(value);
+    });
+    widget.onChanged.call(value);
+    // 重复点击 快进秒数累加10
+    setState(() {
+      value += const Duration(seconds: 10);
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      decoration: const BoxDecoration(
+        gradient: LinearGradient(
+          colors: [
+            Color(0x00767676),
+            Color(0x88767676),
+          ],
+          begin: Alignment.centerLeft,
+          end: Alignment.centerRight,
+        ),
+      ),
+      child: InkWell(
+        splashColor: const Color(0x44767676),
+        onTap: increment,
+        child: Center(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            mainAxisAlignment: MainAxisAlignment.center,
+            crossAxisAlignment: CrossAxisAlignment.center,
+            children: [
+              const Icon(
+                Icons.fast_forward,
+                size: 24.0,
+                color: Color(0xFFFFFFFF),
+              ),
+              const SizedBox(height: 8.0),
+              Text(
+                '快进${value.inSeconds}秒',
+                style: const TextStyle(
+                  fontSize: 12.0,
+                  color: Color(0xFFFFFFFF),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}