Android: Suggest deleting game INIs if they contain global INI data

6 files changed, 65 insertions, 1 deletions

diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/NativeLibrary.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/NativeLibrary.java
index b901f2f691..174d2d1ff2 100644
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/NativeLibrary.java
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/NativeLibrary.java
@@ -253,6 +253,8 @@ public final class NativeLibrary
     Rumble.checkRumble(padID, state);
   }
 
+  public static native void NewGameIniFile();
+
   public static native void LoadGameIniFile(String gameId);
 
   public static native void SaveGameIniFile(String gameId);
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/model/Settings.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/model/Settings.java
index 3eb9e1d2f7..6b0d3acfd3 100644
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/model/Settings.java
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/model/Settings.java
@@ -184,4 +184,36 @@ public class Settings
       SettingsFile.saveCustomGameSettings(gameId, sections);
     }
   }
+
+  public void clearSettings()
+  {
+    sections.clear();
+  }
+
+  public boolean gameIniContainsJunk()
+  {
+    // Older versions of Android Dolphin would copy the entire contents of most of the global INIs
+    // into any game INI that got saved (with some of the sections renamed to match the game INI
+    // section names). The problems with this are twofold:
+    //
+    // 1. The user game INIs will contain entries that Dolphin doesn't support reading from
+    //    game INIs. This is annoying when editing game INIs manually but shouldn't really be
+    //    a problem for those who only use the GUI.
+    //
+    // 2. Global settings will stick around in user game INIs. For instance, if someone wants to
+    //    change the texture cache accuracy to safe for all games, they have to edit not only the
+    //    global settings but also every single game INI they have created, since the old value of
+    //    the texture cache accuracy setting has been copied into every user game INI.
+    //
+    // These problems are serious enough that we should detect and delete such INI files.
+    // Problem 1 is easy to detect, but due to the nature of problem 2, it's unfortunately not
+    // possible to know which lines were added intentionally by the user and which lines were added
+    // unintentionally, which is why we have to delete the whole file in order to fix everything.
+
+    if (TextUtils.isEmpty(gameId))
+      return false;
+
+    SettingSection interfaceSection = sections.get("Interface");
+    return interfaceSection != null && interfaceSection.getSetting("ThemeName") != null;
+  }
 }
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivity.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivity.java
index 78b8ef2d1f..56b407cb82 100644
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivity.java
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivity.java
@@ -1,5 +1,6 @@
 package org.dolphinemu.dolphinemu.features.settings.ui;
 
+import android.app.AlertDialog;
 import android.app.ProgressDialog;
 import android.content.Context;
 import android.content.Intent;
@@ -185,6 +186,18 @@ public final class SettingsActivity extends AppCompatActivity implements Setting
   }
 
   @Override
+  public void showGameIniJunkDeletionQuestion()
+  {
+    new AlertDialog.Builder(this)
+            .setTitle(getString(R.string.game_ini_junk_title))
+            .setMessage(getString(R.string.game_ini_junk_question))
+            .setPositiveButton(R.string.yes, (dialogInterface, i) -> mPresenter.clearSettings())
+            .setNegativeButton(R.string.no, null)
+            .create()
+            .show();
+  }
+
+  @Override
   public org.dolphinemu.dolphinemu.features.settings.model.Settings getSettings()
   {
     return mPresenter.getSettings();
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivityPresenter.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivityPresenter.java
index 57bbe9d6cc..21115e464d 100644
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivityPresenter.java
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivityPresenter.java
@@ -58,6 +58,11 @@ public final class SettingsActivityPresenter
       if (!TextUtils.isEmpty(gameId))
       {
         mSettings.loadSettings(gameId, mView);
+
+        if (mSettings.gameIniContainsJunk())
+        {
+          mView.showGameIniJunkDeletionQuestion();
+        }
       }
       else
       {
@@ -118,6 +123,12 @@ public final class SettingsActivityPresenter
     return mSettings;
   }
 
+  public void clearSettings()
+  {
+    mSettings.clearSettings();
+    onSettingChanged();
+  }
+
   public void onStop(boolean finishing)
   {
     if (directoryStateReceiver != null)
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivityView.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivityView.java
index 910c9f0014..71583aa989 100644
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivityView.java
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivityView.java
@@ -120,6 +120,11 @@ public interface SettingsActivityView
   void showExternalStorageNotMountedHint();
 
   /**
+   * Tell the user that there is junk in the game INI and ask if they want to delete the whole file.
+   */
+  void showGameIniJunkDeletionQuestion();
+
+  /**
    * Start the DirectoryInitialization and listen for the result.
    *
    * @param receiver the broadcast receiver for the DirectoryInitialization
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/utils/SettingsFile.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/utils/SettingsFile.java
index 7ba9bcfd38..54640a3710 100644
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/utils/SettingsFile.java
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/utils/SettingsFile.java
@@ -452,7 +452,8 @@ public final class SettingsFile
           final HashMap<String, SettingSection> sections)
   {
     Set<String> sortedSections = new TreeSet<>(sections.keySet());
-    NativeLibrary.LoadGameIniFile(gameId);
+
+    NativeLibrary.NewGameIniFile();
     for (String sectionKey : sortedSections)
     {
       SettingSection section = sections.get(sectionKey);