refa: dir

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/video/widgets/app_bar.dart

@@ -0,0 +1,58 @@
+import 'package:PiliPlus/plugin/pl_player/models/play_status.dart';
+import 'package:flutter/material.dart';
+
+class ScrollAppBar extends StatelessWidget {
+  final double scrollVal;
+  final Function callback;
+  final PlayerStatus playerStatus;
+
+  const ScrollAppBar({
+    super.key,
+    required this.scrollVal,
+    required this.callback,
+    required this.playerStatus,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final double statusBarHeight = MediaQuery.of(context).padding.top;
+    final videoHeight = MediaQuery.sizeOf(context).width * 9 / 16;
+    double scrollDistance = scrollVal;
+    if (scrollVal > videoHeight - kToolbarHeight) {
+      scrollDistance = videoHeight - kToolbarHeight;
+    }
+    return Positioned(
+      top: -videoHeight + scrollDistance + kToolbarHeight + 0.5,
+      left: 0,
+      right: 0,
+      child: Opacity(
+        opacity: scrollDistance / (videoHeight - kToolbarHeight),
+        child: Container(
+          height: statusBarHeight + kToolbarHeight,
+          color: Theme.of(context).colorScheme.surface,
+          padding: EdgeInsets.only(top: statusBarHeight),
+          child: AppBar(
+            primary: false,
+            centerTitle: true,
+            title: TextButton(
+              onPressed: () => callback(),
+              child: Row(
+                mainAxisSize: MainAxisSize.min,
+                children: [
+                  const Icon(Icons.play_arrow_rounded),
+                  Text(
+                    playerStatus == PlayerStatus.paused
+                        ? '继续播放'
+                        : playerStatus == PlayerStatus.completed
+                            ? '重新播放'
+                            : '播放中',
+                  )
+                ],
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}