feat: Implement DPAD timeline scrubbing on long-press

lib/pages/video/widgets/player_focus.dart

@@ -99,21 +99,22 @@ class PlayerFocus extends StatelessWidget {
     if (key == LogicalKeyboardKey.arrowRight) {
       if (!plPlayerController.isLive) {
         if (event is KeyDownEvent) {
-          if (hasPlayer && !plPlayerController.longPressStatus.value) {
+          if (hasPlayer && !plPlayerController.isSeeking.value) {
             plPlayerController
               ..cancelLongPressTimer()
               ..longPressTimer ??= Timer(
                 const Duration(milliseconds: 200),
-                () => plPlayerController
-                  ..cancelLongPressTimer()
-                  ..setLongPressStatus(true),
+                () {
+                  plPlayerController.cancelLongPressTimer();
+                  plPlayerController.startSeeking(true);
+                },
               );
           }
         } else if (event is KeyUpEvent) {
           plPlayerController.cancelLongPressTimer();
           if (hasPlayer) {
-            if (plPlayerController.longPressStatus.value) {
-              plPlayerController.setLongPressStatus(false);
+            if (plPlayerController.isSeeking.value) {
+              plPlayerController.endSeeking();
             } else {
               plPlayerController.onForward(
                 plPlayerController.fastForBackwardDuration,
@@ -125,6 +126,36 @@ class PlayerFocus extends StatelessWidget {
       return true;
     }
 
+    if (key == LogicalKeyboardKey.arrowLeft) {
+      if (!plPlayerController.isLive) {
+        if (event is KeyDownEvent) {
+          if (hasPlayer && !plPlayerController.isSeeking.value) {
+            plPlayerController
+              ..cancelLongPressTimer()
+              ..longPressTimer ??= Timer(
+                const Duration(milliseconds: 200),
+                () {
+                  plPlayerController.cancelLongPressTimer();
+                  plPlayerController.startSeeking(false);
+                },
+              );
+          }
+        } else if (event is KeyUpEvent) {
+          plPlayerController.cancelLongPressTimer();
+          if (hasPlayer) {
+            if (plPlayerController.isSeeking.value) {
+              plPlayerController.endSeeking();
+            } else {
+              plPlayerController.onBackward(
+                plPlayerController.fastForBackwardDuration,
+              );
+            }
+          }
+        }
+      }
+      return true;
+    }
+
     if (event is KeyDownEvent) {
       final isDigit1 = key == LogicalKeyboardKey.digit1;
       if (isDigit1 || key == LogicalKeyboardKey.digit2) {
@@ -229,14 +260,6 @@ class PlayerFocus extends StatelessWidget {
 
       if (!plPlayerController.isLive) {
         switch (key) {
-          case LogicalKeyboardKey.arrowLeft:
-            if (hasPlayer) {
-              plPlayerController.onBackward(
-                plPlayerController.fastForBackwardDuration,
-              );
-            }
-            return true;
-
           case LogicalKeyboardKey.keyW:
             if (HardwareKeyboard.instance.isMetaPressed) {
               return true;

lib/plugin/pl_player/controller.dart

@@ -124,6 +124,15 @@ class PlPlayerController {
   /// 是否长按倍速
   final RxBool longPressStatus = false.obs;
 
+  /// 是否在拖拽进度
+  final RxBool isSeeking = false.obs;
+
+  /// 是否在快进
+  final RxBool isSeekingForward = false.obs;
+
+  /// 拖拽进度条展示/隐藏
+  final RxBool showSeekIndicator = false.obs;
+
   /// 屏幕锁 为true时，关闭控制栏
   final RxBool controlsLock = false.obs;
 
@@ -645,6 +654,9 @@ class PlPlayerController {
       _isVertical = isVertical ?? false;
       _aid = aid;
       _bvid = bvid;
+      if (bvid != null && cid != null) {
+        getVideoShot();
+      }
       this.cid = cid;
       _epid = epid;
       _seasonId = seasonId;
@@ -1433,6 +1445,81 @@ class PlPlayerController {
     longPressTimer = null;
   }
 
+  DateTime? _seekStartTime;
+
+  Duration _getSeekStep() {
+    int baseStep = 1;
+    if (videoShot case Success<VideoShotData> success) {
+      final data = success.response;
+      if (data.index.length > 1) {
+        baseStep = (data.index[1] - data.index[0]).ceil();
+      }
+    }
+
+    final seekDuration = _seekStartTime != null
+        ? DateTime.now().difference(_seekStartTime!)
+        : Duration.zero;
+
+    int multiplier = 1;
+    if (seekDuration.inSeconds >= 10) {
+      multiplier = 10;
+    } else if (seekDuration.inSeconds >= 5) {
+      multiplier = 5;
+    } else if (seekDuration.inSeconds >= 2) {
+      multiplier = 2;
+    }
+
+    double videoDurationFactor = 1.0;
+    if (duration.value.inMinutes > 60) {
+      videoDurationFactor = 4.0;
+    } else if (duration.value.inMinutes > 30) {
+      videoDurationFactor = 2.0;
+    }
+
+    return Duration(seconds: (baseStep * multiplier * videoDurationFactor).round());
+  }
+
+  Timer? _seekingTimer;
+  void startSeeking(bool isForward) {
+    if (isLive || controlsLock.value || isSeeking.value) return;
+
+    _seekStartTime = DateTime.now();
+    isSeeking.value = true;
+    isSeekingForward.value = isForward;
+    showSeekIndicator.value = true;
+    _videoPlayerController?.pause();
+    _seekingTimer?.cancel();
+    _seekingTimer = Timer.periodic(const Duration(milliseconds: 200), (_) {
+      updateSeekPosition(isForward);
+    });
+  }
+
+  void updateSeekPosition(bool isForward) {
+    final step = _getSeekStep();
+    final newPosition = isForward
+        ? sliderPosition.value + step
+        : sliderPosition.value - step;
+
+    if (newPosition >= Duration.zero && newPosition <= duration.value) {
+      sliderPosition.value = newPosition;
+      updateSliderPositionSecond();
+    }
+  }
+
+  void endSeeking() {
+    _seekingTimer?.cancel();
+    _seekStartTime = null;
+    if (isSeeking.value) {
+      seekTo(sliderPosition.value).then((_) {
+        play();
+      });
+    }
+    isSeeking.value = false;
+    Future.delayed(const Duration(seconds: 1), () {
+      showSeekIndicator.value = false;
+    });
+  }
+
   /// 设置长按倍速状态 live模式下禁用
   Future<void> setLongPressStatus(bool val) async {
     if (isLive) {

lib/plugin/pl_player/view.dart

@@ -48,6 +48,7 @@ import 'package:PiliPlus/plugin/pl_player/widgets/common_btn.dart';
 import 'package:PiliPlus/plugin/pl_player/widgets/forward_seek.dart';
 import 'package:PiliPlus/plugin/pl_player/widgets/mpv_convert_webp.dart';
 import 'package:PiliPlus/plugin/pl_player/widgets/play_pause_btn.dart';
+import 'package:PiliPlus/plugin/pl_player/widgets/seek_indicator.dart';
 import 'package:PiliPlus/utils/duration_utils.dart';
 import 'package:PiliPlus/utils/extension.dart';
 import 'package:PiliPlus/utils/id_utils.dart';
@@ -1625,6 +1626,16 @@ class _PLVideoPlayerState extends State<PLVideoPlayer>
           ),
         ),
 
+        /// 拖拽进度条
+        if (!isLive)
+          IgnorePointer(
+            ignoring: true,
+            child: Align(
+              alignment: Alignment.center,
+              child: SeekIndicator(controller: plPlayerController),
+            ),
+          ),
+
         // 头部、底部控制条
         Positioned.fill(
           top: -1,

lib/plugin/pl_player/widgets/seek_indicator.dart

@@ -0,0 +1,48 @@
+import 'package:PiliPlus/utils/duration_utils.dart';
+import 'package:flutter/material.dart';
+import 'package:get/get.dart';
+import 'package:PiliPlus/plugin/pl_player/controller.dart';
+
+class SeekIndicator extends StatelessWidget {
+  final PlPlayerController controller;
+
+  const SeekIndicator({super.key, required this.controller});
+
+  @override
+  Widget build(BuildContext context) {
+    return Obx(() {
+      if (!controller.showSeekIndicator.value) {
+        return const SizedBox.shrink();
+      }
+      return Material(
+        type: MaterialType.transparency,
+        child: Container(
+          alignment: Alignment.center,
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            crossAxisAlignment: CrossAxisAlignment.center,
+            children: [
+              Obx(
+                () => Icon(
+                  controller.isSeekingForward.value
+                      ? Icons.fast_forward
+                      : Icons.fast_rewind,
+                  size: 24.0,
+                  color: Colors.white,
+                ),
+              ),
+              const SizedBox(height: 8.0),
+              Obx(() => Text(
+                '${DurationUtils.formatDuration(controller.sliderPosition.value.inSeconds)} / ${DurationUtils.formatDuration(controller.duration.value.inSeconds)}',
+                style: const TextStyle(
+                  fontSize: 12.0,
+                  color: Colors.white,
+                ),
+              )),
+            ],
+          ),
+        ),
+      );
+    });
+  }
+}