mod: more slide dismiss pages

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

lib/pages/common/common_slide_page.dart

@@ -0,0 +1,91 @@
+import 'package:PiliPlus/utils/storage.dart';
+import 'package:flutter/material.dart';
+import 'package:get/get.dart';
+
+abstract class CommonSlidePage extends StatefulWidget {
+  const CommonSlidePage({super.key, this.enableSlide});
+
+  final bool? enableSlide;
+}
+
+abstract class CommonSlidePageState<T extends CommonSlidePage>
+    extends State<T> {
+  Offset? downPos;
+  bool? isSliding;
+  late double padding = 0.0;
+
+  late final enableSlide =
+      widget.enableSlide != false && GStorage.slideDismissReplyPage;
+
+  @override
+  Widget build(BuildContext context) {
+    return enableSlide
+        ? Padding(
+            padding: EdgeInsets.only(top: padding),
+            child: buildPage,
+          )
+        : buildPage;
+  }
+
+  Widget get buildPage;
+
+  Widget get buildList => throw UnimplementedError();
+
+  Widget slideList([Widget? buildList]) => GestureDetector(
+        onPanDown: (event) {
+          if (event.localPosition.dx > 30) {
+            isSliding = false;
+          } else {
+            downPos = event.localPosition;
+          }
+        },
+        onPanUpdate: (event) {
+          if (isSliding == false) {
+            return;
+          } else if (isSliding == null) {
+            if (downPos != null) {
+              Offset cumulativeDelta = event.localPosition - downPos!;
+              if (cumulativeDelta.dx.abs() >= cumulativeDelta.dy.abs()) {
+                isSliding = true;
+                setState(() {
+                  padding = event.localPosition.dx;
+                });
+              } else {
+                isSliding = false;
+              }
+            }
+          } else if (isSliding == true) {
+            setState(() {
+              padding = event.localPosition.dx;
+            });
+          }
+        },
+        onPanCancel: () {
+          if (isSliding == true) {
+            if (padding >= 100) {
+              Get.back();
+            } else {
+              setState(() {
+                padding = 0;
+              });
+            }
+          }
+          downPos = null;
+          isSliding = null;
+        },
+        onPanEnd: (event) {
+          if (isSliding == true) {
+            if (padding >= 100) {
+              Get.back();
+            } else {
+              setState(() {
+                padding = 0;
+              });
+            }
+          }
+          downPos = null;
+          isSliding = null;
+        },
+        child: buildList ?? this.buildList,
+      );
+}