From c600d99c58a91150e8dd2d11f60945e74f9024c6 Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Tue, 11 Feb 2025 19:02:16 +0800
Subject: [PATCH] Add Reverse Tap to Turn Page. Close #186

---
 assets/translation.json        |  6 ++++--
 lib/foundation/appdata.dart    |  1 +
 lib/pages/reader/gesture.dart  | 18 ++++++++++++------
 lib/pages/reader/images.dart   |  2 --
 lib/pages/settings/reader.dart |  7 +++++++
 5 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/assets/translation.json b/assets/translation.json
index 7be6c04..6a9019d 100644
--- a/assets/translation.json
+++ b/assets/translation.json
@@ -330,7 +330,8 @@
     "Not added": "未添加",
     "Create a folder": "新建收藏夹",
     "Created successfully": "创建成功",
-    "name": "名称"
+    "name": "名称",
+    "Reverse tap to turn Pages": "反转点击翻页"
   },
   "zh_TW": {
     "Home": "首頁",
@@ -663,6 +664,7 @@
     "Not added": "未添加",
     "Create a folder": "新建收藏夾",
     "Created successfully": "創建成功",
-    "name": "名稱"
+    "name": "名稱",
+    "Reverse tap to turn Pages": "反轉點擊翻頁"
   }
 }
\ No newline at end of file
diff --git a/lib/foundation/appdata.dart b/lib/foundation/appdata.dart
index b68c39a..485e8cb 100644
--- a/lib/foundation/appdata.dart
+++ b/lib/foundation/appdata.dart
@@ -135,6 +135,7 @@ class _Settings with ChangeNotifier {
     'readerMode': 'galleryLeftToRight', // values of [ReaderMode]
     'readerScreenPicNumber': 1, // 1 - 5
     'enableTapToTurnPages': true,
+    'reverseTapToTurnPages': false,
     'enablePageAnimation': true,
     'language': 'system', // system, zh-CN, zh-TW, en-US
     'cacheSize': 2048, // in MB
diff --git a/lib/pages/reader/gesture.dart b/lib/pages/reader/gesture.dart
index 72f7dac..1da7f3e 100644
--- a/lib/pages/reader/gesture.dart
+++ b/lib/pages/reader/gesture.dart
@@ -191,31 +191,37 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
           isBottom = true;
         }
         bool isCenter = false;
+        var prev = context.reader.toPrevPage;
+        var next = context.reader.toNextPage;
+        if (appdata.settings['reverseTapToTurnPages']) {
+          prev = context.reader.toNextPage;
+          next = context.reader.toPrevPage;
+        }
         switch (context.reader.mode) {
           case ReaderMode.galleryLeftToRight:
           case ReaderMode.continuousLeftToRight:
             if (isLeft) {
-              context.reader.toPrevPage();
+              prev();
             } else if (isRight) {
-              context.reader.toNextPage();
+              next();
             } else {
               isCenter = true;
             }
           case ReaderMode.galleryRightToLeft:
           case ReaderMode.continuousRightToLeft:
             if (isLeft) {
-              context.reader.toNextPage();
+              next();
             } else if (isRight) {
-              context.reader.toPrevPage();
+              prev();
             } else {
               isCenter = true;
             }
           case ReaderMode.galleryTopToBottom:
           case ReaderMode.continuousTopToBottom:
             if (isTop) {
-              context.reader.toPrevPage();
+              prev();
             } else if (isBottom) {
-              context.reader.toNextPage();
+              next();
             } else {
               isCenter = true;
             }
diff --git a/lib/pages/reader/images.dart b/lib/pages/reader/images.dart
index 63493c8..5c65483 100644
--- a/lib/pages/reader/images.dart
+++ b/lib/pages/reader/images.dart
@@ -700,10 +700,8 @@ class _ContinuousModeState extends State<_ContinuousMode>
   @override
   bool handleOnTap(Offset location) {
     if (delayedIsScrolling) {
-      print('isScrolling');
       return true;
     }
-    print('isNotScrolling');
     return false;
   }
 }
diff --git a/lib/pages/settings/reader.dart b/lib/pages/settings/reader.dart
index 79f3fa8..82b088c 100644
--- a/lib/pages/settings/reader.dart
+++ b/lib/pages/settings/reader.dart
@@ -22,6 +22,13 @@ class _ReaderSettingsState extends State<ReaderSettings> {
             widget.onChanged?.call("enableTapToTurnPages");
           },
         ).toSliver(),
+        _SwitchSetting(
+          title: "Reverse tap to turn Pages".tl,
+          settingKey: "reverseTapToTurnPages",
+          onChanged: () {
+            widget.onChanged?.call("reverseTapToTurnPages");
+          },
+        ).toSliver(),
         _SwitchSetting(
           title: "Page animation".tl,
           settingKey: "enablePageAnimation",