remove some unused code and todos

app/build.gradle

@@ -46,10 +46,6 @@ android {
     }
 
     ndkVersion '25.2.9519653'
-    androidResources { // todo: check, probably both can be removed (together with searching dicts in res/raw)
-        noCompress 'main.dict'
-        noCompress 'empty.dict'
-    }
 
     packagingOptions {
         jniLibs {

app/src/main/java/org/dslul/openboard/inputmethod/keyboard/emoji/EmojiCategory.java

@@ -236,11 +236,6 @@ final class EmojiCategory {
         return mCurrentCategoryPageId;
     }
 
-    public void saveLastTypedCategoryPage() {
-        Settings.writeLastTypedEmojiCategoryPageId(
-                mPrefs, mCurrentCategoryId, mCurrentCategoryPageId);
-    }
-
     public boolean isInRecentTab() {
         return mCurrentCategoryId == EmojiCategory.ID_RECENTS;
     }

app/src/main/java/org/dslul/openboard/inputmethod/keyboard/emoji/EmojiPalettesView.java

@@ -353,7 +353,6 @@ public final class EmojiPalettesView extends LinearLayout
     @Override
     public void onReleaseKey(final Key key) {
         mEmojiPalettesAdapter.addRecentKey(key);
-        mEmojiCategory.saveLastTypedCategoryPage();
         final int code = key.getCode();
         if (code == Constants.CODE_OUTPUT_TEXT) {
             mKeyboardActionListener.onTextInput(key.getOutputText());

app/src/main/java/org/dslul/openboard/inputmethod/latin/DictionaryFactory.java

@@ -17,7 +17,6 @@ import org.dslul.openboard.inputmethod.latin.makedict.DictionaryHeader;
 import org.dslul.openboard.inputmethod.latin.utils.DictionaryInfoUtils;
 
 import java.io.File;
-import java.text.Normalizer;
 import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.Locale;
@@ -97,10 +96,8 @@ public final class DictionaryFactory {
     public static void killDictionary(final Context context, final AssetFileAddress f) {
         if (f.pointsToPhysicalFile()) {
             f.deleteUnderlyingFile();
-            // notify the user
+            // notify the user if possible (toast not showing up on Android 13+)
-            // todo: use an alertDialog to avoid the toast not showing up on Android 13+
+            //  but not that important, as the not working dictionary should be obvious
-            //  but asyncTask doesn't work because android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?
-            //  https://stackoverflow.com/questions/7199014/show-an-alertdialog-from-a-background-thread-with-the-appcontext
             final String wordlistId = DictionaryInfoUtils.getWordListIdFromFileName(new File(f.mFilename).getName());
             new Handler(Looper.getMainLooper()).post(() ->
                     Toast.makeText(context, "dictionary "+wordlistId+" is invalid, deleting", Toast.LENGTH_LONG).show()

app/src/main/java/org/dslul/openboard/inputmethod/latin/RichInputConnection.java

@@ -386,14 +386,14 @@ public final class RichInputConnection implements PrivateCommandPerformer {
                 spacingAndPunctuations, hasSpaceBefore);
     }
 
-    public int getCodePointBeforeCursor() { // todo: behavior still correct? also should do this to getCharBeforeBeforeCursor
+    public int getCodePointBeforeCursor() {
         final CharSequence text = mComposingText.length() == 0 ? mCommittedTextBeforeComposingText : mComposingText;
         final int length = text.length();
         if (length < 1) return Constants.NOT_A_CODE;
         return Character.codePointBefore(text, length);
     }
 
-    public int getCharBeforeBeforeCursor() { // todo: behavior still correct?
+    public int getCharBeforeBeforeCursor() {
         if (mComposingText.length() >= 2) return mComposingText.charAt(mComposingText.length() - 2);
         final int length = mCommittedTextBeforeComposingText.length();
         if (mComposingText.length() == 1) return mCommittedTextBeforeComposingText.charAt(length - 1);

app/src/main/java/org/dslul/openboard/inputmethod/latin/common/Colors.kt

@@ -47,8 +47,6 @@ class Colors (
     val adjustedKeyText: Int
     val spaceBarText: Int
 
-    // todo (later): evaluate which colors, colorFilters and colorStateLists are actually necessary
-    //  also, ideally the color filters would be private and chosen internally depending on type
     val backgroundFilter: ColorFilter
     val adjustedBackgroundFilter: ColorFilter
     val keyBackgroundFilter: ColorFilter
@@ -83,7 +81,7 @@ class Colors (
             spaceBarText = keyHintText
         }
 
-        // create color filters, todo: maybe better / simplify
+        // create color filters
         val states = arrayOf(intArrayOf(android.R.attr.state_pressed), intArrayOf(-android.R.attr.state_pressed))
         fun stateList(pressed: Int, normal: Int) = ColorStateList(states, intArrayOf(pressed, normal))
         // todo (idea): make better use of the states?

app/src/main/java/org/dslul/openboard/inputmethod/latin/settings/Settings.java

@@ -29,7 +29,6 @@ import org.dslul.openboard.inputmethod.latin.InputAttributes;
 import org.dslul.openboard.inputmethod.latin.R;
 import org.dslul.openboard.inputmethod.latin.common.Colors;
 import org.dslul.openboard.inputmethod.latin.common.LocaleUtils;
-import org.dslul.openboard.inputmethod.latin.common.StringUtils;
 import org.dslul.openboard.inputmethod.latin.utils.AdditionalSubtypeUtils;
 import org.dslul.openboard.inputmethod.latin.utils.ColorUtilKt;
 import org.dslul.openboard.inputmethod.latin.utils.DeviceProtectedUtils;
@@ -40,11 +39,9 @@ import org.dslul.openboard.inputmethod.latin.utils.StatsUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Locale;
-import java.util.Set;
 import java.util.concurrent.locks.ReentrantLock;
 
 public final class Settings implements SharedPreferences.OnSharedPreferenceChangeListener {
@@ -126,17 +123,8 @@ public final class Settings implements SharedPreferences.OnSharedPreferenceChang
     public static final String PREF_DONT_SHOW_MISSING_DICTIONARY_DIALOG = "pref_dont_show_missing_dict_dialog";
     public static final String PREF_PINNED_KEYS = "pref_pinned_keys";
 
-
-    private static final String PREF_LAST_USED_PERSONALIZATION_TOKEN =
-            "pref_last_used_personalization_token";
-    private static final String PREF_LAST_PERSONALIZATION_DICT_WIPED_TIME =
-            "pref_last_used_personalization_dict_wiped_time";
-    private static final String PREF_CORPUS_HANDLES_FOR_PERSONALIZATION =
-            "pref_corpus_handles_for_personalization";
-
     // Emoji
     public static final String PREF_EMOJI_RECENT_KEYS = "emoji_recent_keys";
-    public static final String PREF_EMOJI_CATEGORY_LAST_TYPED_ID = "emoji_category_last_typed_id";
     public static final String PREF_LAST_SHOWN_EMOJI_CATEGORY_ID = "last_shown_emoji_category_id";
     public static final String PREF_LAST_SHOWN_EMOJI_CATEGORY_PAGE_ID = "last_shown_emoji_category_page_id";
 
@@ -334,18 +322,6 @@ public final class Settings implements SharedPreferences.OnSharedPreferenceChang
                 R.array.keypress_vibration_durations, DEFAULT_KEYPRESS_VIBRATION_DURATION));
     }
 
-    public static float readKeyPreviewAnimationScale(final SharedPreferences prefs,
-                                                     final String prefKey, final float defaultValue) {
-        final float fraction = prefs.getFloat(prefKey, UNDEFINED_PREFERENCE_VALUE_FLOAT);
-        return (fraction != UNDEFINED_PREFERENCE_VALUE_FLOAT) ? fraction : defaultValue;
-    }
-
-    public static int readKeyPreviewAnimationDuration(final SharedPreferences prefs,
-                                                      final String prefKey, final int defaultValue) {
-        final int milliseconds = prefs.getInt(prefKey, UNDEFINED_PREFERENCE_VALUE_INT);
-        return (milliseconds != UNDEFINED_PREFERENCE_VALUE_INT) ? milliseconds : defaultValue;
-    }
-
     public static boolean readClipboardHistoryEnabled(final SharedPreferences prefs) {
         return prefs.getBoolean(PREF_ENABLE_CLIPBOARD_HISTORY, true);
     }
@@ -423,37 +399,6 @@ public final class Settings implements SharedPreferences.OnSharedPreferenceChang
                 && conf.hardKeyboardHidden != Configuration.HARDKEYBOARDHIDDEN_YES;
     }
 
-    public void writeLastUsedPersonalizationToken(byte[] token) {
-        if (token == null) {
-            mPrefs.edit().remove(PREF_LAST_USED_PERSONALIZATION_TOKEN).apply();
-        } else {
-            final String tokenStr = StringUtils.byteArrayToHexString(token);
-            mPrefs.edit().putString(PREF_LAST_USED_PERSONALIZATION_TOKEN, tokenStr).apply();
-        }
-    }
-
-    public byte[] readLastUsedPersonalizationToken() {
-        final String tokenStr = mPrefs.getString(PREF_LAST_USED_PERSONALIZATION_TOKEN, null);
-        return StringUtils.hexStringToByteArray(tokenStr);
-    }
-
-    public void writeLastPersonalizationDictWipedTime(final long timestamp) {
-        mPrefs.edit().putLong(PREF_LAST_PERSONALIZATION_DICT_WIPED_TIME, timestamp).apply();
-    }
-
-    public long readLastPersonalizationDictGeneratedTime() {
-        return mPrefs.getLong(PREF_LAST_PERSONALIZATION_DICT_WIPED_TIME, 0);
-    }
-
-    public void writeCorpusHandlesForPersonalization(final Set<String> corpusHandles) {
-        mPrefs.edit().putStringSet(PREF_CORPUS_HANDLES_FOR_PERSONALIZATION, corpusHandles).apply();
-    }
-
-    public Set<String> readCorpusHandlesForPersonalization() {
-        final Set<String> emptySet = Collections.emptySet();
-        return mPrefs.getStringSet(PREF_CORPUS_HANDLES_FOR_PERSONALIZATION, emptySet);
-    }
-
     public static void writeEmojiRecentKeys(final SharedPreferences prefs, String str) {
         prefs.edit().putString(PREF_EMOJI_RECENT_KEYS, str).apply();
     }
@@ -462,18 +407,6 @@ public final class Settings implements SharedPreferences.OnSharedPreferenceChang
         return prefs.getString(PREF_EMOJI_RECENT_KEYS, "");
     }
 
-    public static void writeLastTypedEmojiCategoryPageId(
-            final SharedPreferences prefs, final int categoryId, final int categoryPageId) {
-        final String key = PREF_EMOJI_CATEGORY_LAST_TYPED_ID + categoryId;
-        prefs.edit().putInt(key, categoryPageId).apply();
-    }
-
-    public static int readLastTypedEmojiCategoryPageId(
-            final SharedPreferences prefs, final int categoryId) {
-        final String key = PREF_EMOJI_CATEGORY_LAST_TYPED_ID + categoryId;
-        return prefs.getInt(key, 0);
-    }
-
     public static void writeLastShownEmojiCategoryId(
             final SharedPreferences prefs, final int categoryId) {
         prefs.edit().putInt(PREF_LAST_SHOWN_EMOJI_CATEGORY_ID, categoryId).apply();
@@ -566,7 +499,6 @@ public final class Settings implements SharedPreferences.OnSharedPreferenceChang
             case PREF_COLOR_ACCENT_SUFFIX:
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q && Build.VERSION.SDK_INT < Build.VERSION_CODES.S) {
                     // try determining accent color on Android 10 & 11, accent is not available in resources
-                    // todo: test whether this actually works
                     final Context wrapper = new ContextThemeWrapper(context, android.R.style.Theme_DeviceDefault);
                     final TypedValue value = new TypedValue();
                     if (wrapper.getTheme().resolveAttribute(android.R.attr.colorAccent, value, true))

app/src/main/res/raw/empty.dict

@@ -1 +0,0 @@
-<EFBFBD><EFBFBD>:<3A>