From c54b8e62d72bf6e8e7508d9f43373749b99142e0 Mon Sep 17 00:00:00 2001
From: Andreas E <andreas.everos@gmail.com>
Date: Sun, 21 Jun 2020 16:47:18 +0200
Subject: [PATCH] Add option to reverse tapping

---
 .../kanade/tachiyomi/data/preference/PreferenceKeys.kt   | 2 ++
 .../tachiyomi/data/preference/PreferencesHelper.kt       | 2 ++
 .../eu/kanade/tachiyomi/ui/reader/viewer/ViewerConfig.kt | 4 ++++
 .../tachiyomi/ui/reader/viewer/pager/PagerViewer.kt      | 9 +++++++--
 .../tachiyomi/ui/setting/SettingsReaderController.kt     | 5 +++++
 app/src/main/res/values/strings.xml                      | 1 +
 6 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt b/app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt
index 851e17029..d93fd0c8e 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt
@@ -55,6 +55,8 @@ object PreferenceKeys {
 
     const val readWithTapping = "reader_tap"
 
+    const val readWithTappingInverted = "reader_volume_keys_inverted"
+
     const val readWithLongTap = "reader_long_tap"
 
     const val readWithVolumeKeys = "reader_volume_keys"
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt b/app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt
index 8cb193959..df32cb70e 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt
@@ -121,6 +121,8 @@ class PreferencesHelper(val context: Context) {
 
     fun readWithTapping() = flowPrefs.getBoolean(Keys.readWithTapping, true)
 
+    fun readWithTappingInverted() = flowPrefs.getBoolean(Keys.readWithTappingInverted, false)
+
     fun readWithLongTap() = flowPrefs.getBoolean(Keys.readWithLongTap, true)
 
     fun readWithVolumeKeys() = flowPrefs.getBoolean(Keys.readWithVolumeKeys, false)
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/ViewerConfig.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/ViewerConfig.kt
index 752045821..4221cf6d5 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/ViewerConfig.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/ViewerConfig.kt
@@ -20,6 +20,7 @@ abstract class ViewerConfig(preferences: PreferencesHelper) {
 
     var tappingEnabled = true
     var longTapEnabled = true
+    var tappingInverted = false
     var doubleTapAnimDuration = 500
     var volumeKeysEnabled = false
     var volumeKeysInverted = false
@@ -30,6 +31,9 @@ abstract class ViewerConfig(preferences: PreferencesHelper) {
         preferences.readWithTapping()
             .register({ tappingEnabled = it })
 
+        preferences.readWithTappingInverted()
+                .register({ tappingInverted = it })
+
         preferences.readWithLongTap()
             .register({ longTapEnabled = it })
 
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerViewer.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerViewer.kt
index 81ea15a41..29132c079 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerViewer.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerViewer.kt
@@ -81,9 +81,14 @@ abstract class PagerViewer(val activity: ReaderActivity) : BaseViewer {
         })
         pager.tapListener = { event ->
             val positionX = event.x
+            val tappingInverted = config.tappingInverted
+
+            val leftSideTap = positionX < pager.width * 0.33f && config.tappingEnabled
+            val rightSideTap = positionX > pager.width * 0.66f && config.tappingEnabled
+
             when {
-                positionX < pager.width * 0.33f && config.tappingEnabled -> moveLeft()
-                positionX > pager.width * 0.66f && config.tappingEnabled -> moveRight()
+                leftSideTap && !tappingInverted || rightSideTap && tappingInverted -> moveLeft()
+                rightSideTap && !tappingInverted || leftSideTap && tappingInverted -> moveRight()
                 else -> activity.toggleMenu()
             }
         }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsReaderController.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsReaderController.kt
index 12fe7f5ca..f72923e07 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsReaderController.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsReaderController.kt
@@ -190,6 +190,11 @@ class SettingsReaderController : SettingsController() {
                 titleRes = R.string.pref_read_with_tapping
                 defaultValue = true
             }
+            switchPreference {
+                key = Keys.readWithTappingInverted
+                titleRes = R.string.pref_read_with_tapping_inverted
+                defaultValue = false
+            }.apply { dependency = Keys.readWithTapping }
             switchPreference {
                 key = Keys.readWithLongTap
                 titleRes = R.string.pref_read_with_long_tap
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 13cac05c9..15339ad10 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -665,5 +665,6 @@
     <string name="channel_backup_restore">Backup and restore</string>
     <string name="channel_backup_restore_progress">Progress</string>
     <string name="channel_backup_restore_complete">Complete</string>
+    <string name="pref_read_with_tapping_inverted">Invert tapping</string>
 
 </resources>