added support for languages with one text case

CONTRIBUTING.md

@@ -57,7 +57,8 @@ To support a new language one needs to:
   - `name` is the native name of the language (e.g. "English", "Deutsch", "Українська").
   - `locale` contains the language and the country codes (e.g. "en-US", "es-AR", "it-IT"). Refer to the list of [supported locales in Java](https://www.oracle.com/java/technologies/javase/jdk8-jre8-suported-locales.html#util-text).
   - `dictionaryFile` is the name of the dictionary in `assets/` folder.
-  - `icon`, `abcLowerCaseIcon` and `abcUpperCaseIcon` are the respective status icons for Predictive mode, ABC (lowercase) and ABC (uppercase).
+  - `icon` is the status icon for Predictive mode.
+  - `abcLowerCaseIcon` and `abcUpperCaseIcon` are the respective status icons for ABC (non-predictive) modes. Note that, you must not set `abcUpperCaseIcon`, if your language has no uppercase and lowercase letters (like Arabic, Asian scripts and Hebrew).
   - Set `isPunctuationPartOfWords` to `true`, if the dictionary contains words with apostrophes or dashes, such as: `it's`, `you'll`, `a'tje` or `п'ят`. This will allow using 1-key for typing them (they will appear as suggestions). `false` will enable faster typing when apostrophes or other punctuation are not part of the words (no such words will be suggested).
   - `characterMap` contains the letters and punctuation marks associated with each key.
 - Finally, add the new language to the list in `LanguageCollection.java`. You only need to add it in one place, in the constructor. Please, be nice and maintain the alphabetical order.

src/io/github/sspanak/tt9/ime/TraditionalT9.java

@@ -51,7 +51,7 @@ public class TraditionalT9 extends KeyPadHandler {
 	private void loadSettings() {
 		mLanguage = LanguageCollection.getLanguage(settings.getInputLanguage());
 		mEnabledLanguages = settings.getEnabledLanguageIds();
-		mInputMode = InputMode.getInstance(settings, settings.getInputMode());
+		mInputMode = InputMode.getInstance(settings, mLanguage, settings.getInputMode());
 		mInputMode.setTextCase(settings.getTextCase());
 	}
 
@@ -96,9 +96,10 @@ public class TraditionalT9 extends KeyPadHandler {
 
 		// some input fields support only numbers or are not suited for predictions (e.g. password fields)
 		determineAllowedInputModes();
-		mInputMode = InputModeValidator.validateMode(settings, mInputMode, allowedInputModes);
+		int modeId = InputModeValidator.validateMode(settings, mInputMode, allowedInputModes);
-
+		mInputMode = InputMode.getInstance(settings, mLanguage, modeId);
 		mInputMode.setTextFieldCase(textField.determineTextCase(inputType));
+
 		// Some modes may want to change the default text case based on grammar rules.
 		determineNextTextCase();
 		InputModeValidator.validateTextCase(settings, mInputMode, settings.getTextCase());
@@ -197,7 +198,7 @@ public class TraditionalT9 extends KeyPadHandler {
 
 		String word = mSuggestionView.getCurrentSuggestion();
 
-		mInputMode.onAcceptSuggestion(mLanguage, word);
+		mInputMode.onAcceptSuggestion(word);
 		commitCurrentSuggestion();
 		autoCorrectSpace(word, true, -1, false, false);
 		resetKeyRepeat();
@@ -208,7 +209,7 @@ public class TraditionalT9 extends KeyPadHandler {
 
 	protected boolean onUp() {
 		if (previousSuggestion()) {
-			mInputMode.setWordStem(mLanguage, mSuggestionView.getCurrentSuggestion(), true);
+			mInputMode.setWordStem(mSuggestionView.getCurrentSuggestion(), true);
 			textField.setComposingTextWithHighlightedStem(mSuggestionView.getCurrentSuggestion(), mInputMode);
 			return true;
 		}
@@ -219,7 +220,7 @@ public class TraditionalT9 extends KeyPadHandler {
 
 	protected boolean onDown() {
 		if (nextSuggestion()) {
-			mInputMode.setWordStem(mLanguage, mSuggestionView.getCurrentSuggestion(), true);
+			mInputMode.setWordStem(mSuggestionView.getCurrentSuggestion(), true);
 			textField.setComposingTextWithHighlightedStem(mSuggestionView.getCurrentSuggestion(), mInputMode);
 			return true;
 		}
@@ -230,7 +231,7 @@ public class TraditionalT9 extends KeyPadHandler {
 
 	protected boolean onLeft() {
 		if (mInputMode.clearWordStem()) {
-			mInputMode.loadSuggestions(handleSuggestionsAsync, mLanguage, getComposingText());
+			mInputMode.loadSuggestions(handleSuggestionsAsync, getComposingText());
 		} else {
 			jumpBeforeComposingText();
 		}
@@ -247,8 +248,8 @@ public class TraditionalT9 extends KeyPadHandler {
 			filter = getComposingText();
 		}
 
-		if (mInputMode.setWordStem(mLanguage, filter, repeat)) {
+		if (mInputMode.setWordStem(filter, repeat)) {
-			mInputMode.loadSuggestions(handleSuggestionsAsync, mLanguage, filter);
+			mInputMode.loadSuggestions(handleSuggestionsAsync, filter);
 		} else if (filter.length() == 0) {
 			mInputMode.reset();
 		}
@@ -270,8 +271,8 @@ public class TraditionalT9 extends KeyPadHandler {
 
 		// Automatically accept the current word, when the next one is a space or whatnot,
 		// instead of requiring "OK" before that.
-		if (mInputMode.shouldAcceptCurrentSuggestion(mLanguage, key, hold, repeat > 0)) {
+		if (mInputMode.shouldAcceptCurrentSuggestion(key, hold, repeat > 0)) {
-			mInputMode.onAcceptSuggestion(mLanguage, currentWord);
+			mInputMode.onAcceptSuggestion(currentWord);
 			commitCurrentSuggestion(false);
 			autoCorrectSpace(currentWord, false, key, hold, repeat > 0);
 			currentWord = "";
@@ -283,7 +284,7 @@ public class TraditionalT9 extends KeyPadHandler {
 			determineNextTextCase();
 		}
 
-		if (!mInputMode.onNumber(mLanguage, key, hold, repeat)) {
+		if (!mInputMode.onNumber(key, hold, repeat)) {
 			return false;
 		}
 
@@ -295,7 +296,7 @@ public class TraditionalT9 extends KeyPadHandler {
 		if (mInputMode.getWord() != null) {
 			currentWord = mInputMode.getWord();
 
-			mInputMode.onAcceptSuggestion(mLanguage, currentWord);
+			mInputMode.onAcceptSuggestion(currentWord);
 			textField.setText(currentWord);
 			clearSuggestions();
 			autoCorrectSpace(currentWord, true, key, hold, repeat > 0);
@@ -333,6 +334,7 @@ public class TraditionalT9 extends KeyPadHandler {
 	protected boolean onKeyNextLanguage() {
 		if (nextLang()) {
 			commitCurrentSuggestion(false);
+			mInputMode.changeLanguage(mLanguage);
 			mInputMode.reset();
 			resetKeyRepeat();
 			clearSuggestions();
@@ -430,14 +432,14 @@ public class TraditionalT9 extends KeyPadHandler {
 
 
 	private void getSuggestions() {
-		if (!mInputMode.loadSuggestions(handleSuggestionsAsync, mLanguage, mSuggestionView.getCurrentSuggestion())) {
+		if (!mInputMode.loadSuggestions(handleSuggestionsAsync, mSuggestionView.getCurrentSuggestion())) {
 			handleSuggestions();
 		}
 	}
 
 
 	private void handleSuggestions() {
-		setSuggestions(mInputMode.getSuggestions(mLanguage));
+		setSuggestions(mInputMode.getSuggestions());
 
 		// Put the first suggestion in the text field,
 		// but cut it off to the length of the sequence (how many keys were pressed),
@@ -489,7 +491,7 @@ public class TraditionalT9 extends KeyPadHandler {
 
 	private void nextInputMode() {
 		if (mEditing == EDITING_STRICT_NUMERIC || mEditing == EDITING_DIALER) {
-			mInputMode = !mInputMode.is123() ? InputMode.getInstance(settings, InputMode.MODE_123) : mInputMode;
+			mInputMode = !mInputMode.is123() ? InputMode.getInstance(settings, mLanguage, InputMode.MODE_123) : mInputMode;
 		}
 		// when typing a word or viewing scrolling the suggestions, only change the case
 		else if (!isSuggestionViewHidden()) {
@@ -498,9 +500,9 @@ public class TraditionalT9 extends KeyPadHandler {
 			// When we are in AUTO mode and the dictionary word is in uppercase,
 			// the mode would switch to UPPERCASE, but visually, the word would not change.
 			// This is why we retry, until there is a visual change.
-			for (int retries = 0; retries < 2; retries++) {
+			for (int retries = 0; retries < 2 && mLanguage.hasUpperCase(); retries++) {
 				mInputMode.nextTextCase();
-				setSuggestions(mInputMode.getSuggestions(mLanguage), mSuggestionView.getCurrentIndex());
+				setSuggestions(mInputMode.getSuggestions(), mSuggestionView.getCurrentIndex());
 				refreshComposingText();
 
 				if (!currentSuggestionBefore.equals(getComposingText())) {
@@ -509,17 +511,17 @@ public class TraditionalT9 extends KeyPadHandler {
 			}
 		}
 		// make "abc" and "ABC" separate modes from user perspective
-		else if (mInputMode.isABC() && mInputMode.getTextCase() == InputMode.CASE_LOWER) {
+		else if (mInputMode.isABC() && mInputMode.getTextCase() == InputMode.CASE_LOWER && mLanguage.hasUpperCase()) {
 			mInputMode.nextTextCase();
 		} else {
 			int modeIndex = (allowedInputModes.indexOf(mInputMode.getId()) + 1) % allowedInputModes.size();
-			mInputMode = InputMode.getInstance(settings, allowedInputModes.get(modeIndex));
+			mInputMode = InputMode.getInstance(settings, mLanguage, allowedInputModes.get(modeIndex));
 
 			mInputMode.defaultTextCase();
 		}
 
 		// save the settings for the next time
-		settings.saveInputMode(mInputMode);
+		settings.saveInputMode(mInputMode.getId());
 		settings.saveTextCase(mInputMode.getTextCase());
 
 		UI.updateStatusIcon(this, mLanguage, mInputMode);
@@ -558,7 +560,7 @@ public class TraditionalT9 extends KeyPadHandler {
 
 		textField.setComposingText(word, 0);
 		textField.finishComposingText();
-		mInputMode.onAcceptSuggestion(mLanguage, word);
+		mInputMode.onAcceptSuggestion(word);
 		mInputMode.reset();
 		setSuggestions(null);
 	}
@@ -569,11 +571,11 @@ public class TraditionalT9 extends KeyPadHandler {
 
 		int lastInputModeId = settings.getInputMode();
 		if (allowedInputModes.contains(lastInputModeId)) {
-			mInputMode = InputMode.getInstance(settings, lastInputModeId);
+			mInputMode = InputMode.getInstance(settings, mLanguage, lastInputModeId);
 		} else if (allowedInputModes.contains(InputMode.MODE_ABC)) {
-			mInputMode = InputMode.getInstance(settings, InputMode.MODE_ABC);
+			mInputMode = InputMode.getInstance(settings, mLanguage, InputMode.MODE_ABC);
 		} else {
-			mInputMode = InputMode.getInstance(settings, allowedInputModes.get(0));
+			mInputMode = InputMode.getInstance(settings, mLanguage, allowedInputModes.get(0));
 		}
 
 		if (inputType.isDialer()) {

src/io/github/sspanak/tt9/ime/helpers/InputModeValidator.java

@@ -41,23 +41,19 @@ public class InputModeValidator {
 		return validLanguage;
 	}
 
-	public static InputMode validateMode(SettingsStore settings, InputMode inputMode, ArrayList<Integer> allowedModes) {
+	public static int validateMode(SettingsStore settings, InputMode inputMode, ArrayList<Integer> allowedModes) {
 		if (allowedModes.size() > 0 && allowedModes.contains(inputMode.getId())) {
-			inputMode.reset();
+			return inputMode.getId();
-			return inputMode;
 		}
 
-		InputMode newMode = InputMode.getInstance(
+		int newModeId = allowedModes.size() > 0 ? allowedModes.get(0) : InputMode.MODE_123;
-			settings,
+		settings.saveInputMode(newModeId);
-			allowedModes.size() > 0 ? allowedModes.get(0) : InputMode.MODE_123
-		);
-		settings.saveInputMode(newMode);
 
-		if (newMode.getId() != inputMode.getId()) {
+		if (newModeId != inputMode.getId()) {
-			Logger.w("tt9/validateMode", "Invalid input mode: " + inputMode.getId() + " Enforcing: " + newMode.getId());
+			Logger.w("tt9/validateMode", "Invalid input mode: " + inputMode.getId() + " Enforcing: " + newModeId);
 		}
 
-		return newMode;
+		return newModeId;
 	}
 
 	public static void validateTextCase(SettingsStore settings, InputMode inputMode, int newTextCase) {

src/io/github/sspanak/tt9/ime/modes/InputMode.java

@@ -27,16 +27,17 @@ abstract public class InputMode {
 	protected int textFieldTextCase = CASE_UNDEFINED;
 
 	// data
+	protected Language language;
 	protected ArrayList<String> suggestions = new ArrayList<>();
 	protected String word = null;
 
 
-	public static InputMode getInstance(SettingsStore settings, int mode) {
+	public static InputMode getInstance(SettingsStore settings, Language language, int mode) {
 		switch (mode) {
 			case MODE_PREDICTIVE:
-				return new ModePredictive(settings);
+				return new ModePredictive(settings, language);
 			case MODE_ABC:
-				return new ModeABC();
+				return new ModeABC(language);
 			default:
 				Logger.w("tt9/InputMode", "Defaulting to mode: " + Mode123.class.getName() + " for unknown InputMode: " + mode);
 			case MODE_123:
@@ -46,17 +47,17 @@ abstract public class InputMode {
 
 	// Key handlers. Return "true" when handling the key or "false", when is nothing to do.
 	public boolean onBackspace() { return false; }
-	abstract public boolean onNumber(Language language, int key, boolean hold, int repeat);
+	abstract public boolean onNumber(int key, boolean hold, int repeat);
 
 	// Suggestions
-	public void onAcceptSuggestion(Language language, String suggestion) {}
+	public void onAcceptSuggestion(String suggestion) {}
 	protected void onSuggestionsUpdated(Handler handler) { handler.sendEmptyMessage(0); }
-	public boolean loadSuggestions(Handler handler, Language language, String currentWord) { return false; }
+	public boolean loadSuggestions(Handler handler, String currentWord) { return false; }
 
-	public ArrayList<String> getSuggestions(Language language) {
+	public ArrayList<String> getSuggestions() {
 		ArrayList<String> newSuggestions = new ArrayList<>();
 		for (String s : suggestions) {
-			newSuggestions.add(adjustSuggestionTextCase(s, textCase, language));
+			newSuggestions.add(adjustSuggestionTextCase(s, textCase));
 		}
 
 		return newSuggestions;
@@ -73,9 +74,14 @@ abstract public class InputMode {
 	// Utility
 	abstract public int getId();
 	abstract public int getSequenceLength(); // The number of key presses for the current word.
+	public void changeLanguage(Language newLanguage) {
+		if (newLanguage != null) {
+			language = newLanguage;
+		}
+	}
 
 	// Interaction with the IME. Return "true" if it should perform the respective action.
-	public boolean shouldAcceptCurrentSuggestion(Language language, int key, boolean hold, boolean repeat) { return false; }
+	public boolean shouldAcceptCurrentSuggestion(int key, boolean hold, boolean repeat) { return false; }
 	public boolean shouldAddAutoSpace(InputType inputType, TextField textField, boolean isWordAcceptedManually, int incomingKey, boolean hold, boolean repeat) { return false; }
 	public boolean shouldDeletePrecedingSpace(InputType inputType) { return false; }
 	public boolean shouldSelectNextSuggestion() { return false; }
@@ -116,12 +122,12 @@ abstract public class InputMode {
 	public void determineNextWordTextCase(SettingsStore settings, boolean isThereText, String textBeforeCursor) {}
 
 	// Based on the internal logic of the mode (punctuation or grammar rules), re-adjust the text case for when getSuggestions() is called.
-	protected String adjustSuggestionTextCase(String word, int newTextCase, Language language) { return word; }
+	protected String adjustSuggestionTextCase(String word, int newTextCase) { return word; }
 
 	// Stem filtering.
 	// Where applicable, return "true" if the mode supports it and the operation was possible.
 	public boolean clearWordStem() { return false; }
 	public boolean isStemFilterFuzzy() { return false; }
 	public String getWordStem() { return ""; }
-	public boolean setWordStem(Language language, String stem, boolean exact) { return false; }
+	public boolean setWordStem(String stem, boolean exact) { return false; }
 }

src/io/github/sspanak/tt9/ime/modes/Mode123.java

@@ -2,8 +2,6 @@ package io.github.sspanak.tt9.ime.modes;
 
 import java.util.ArrayList;
 
-import io.github.sspanak.tt9.languages.Language;
-
 public class Mode123 extends InputMode {
 	public int getId() { return MODE_123; }
 
@@ -12,7 +10,7 @@ public class Mode123 extends InputMode {
 	}
 
 
-	public boolean onNumber(Language l, int key, boolean hold, int repeat) {
+	public boolean onNumber(int key, boolean hold, int repeat) {
 		if (key != 0) {
 			return false;
 		}

src/io/github/sspanak/tt9/ime/modes/ModeABC.java

@@ -9,13 +9,13 @@ public class ModeABC extends InputMode {
 
 	private boolean shouldSelectNextLetter = false;
 
-	ModeABC() {
+	ModeABC(Language lang) {
-		allowedTextCases.add(CASE_LOWER);
+		changeLanguage(lang);
-		allowedTextCases.add(CASE_UPPER);
 	}
 
 
-	public boolean onNumber(Language language, int key, boolean hold, int repeat) {
+	@Override
+	public boolean onNumber(int key, boolean hold, int repeat) {
 		shouldSelectNextLetter = false;
 		suggestions = language.getKeyCharacters(key);
 		word = null;
@@ -31,18 +31,29 @@ public class ModeABC extends InputMode {
 	}
 
 
-	protected String adjustSuggestionTextCase(String word, int newTextCase, Language language) {
+	@Override
+	protected String adjustSuggestionTextCase(String word, int newTextCase) {
 		return newTextCase == CASE_UPPER ? word.toUpperCase(language.getLocale()) : word.toLowerCase(language.getLocale());
 	}
 
+	@Override
+	public void changeLanguage(Language language) {
+		super.changeLanguage(language);
 
-	final public boolean isABC() { return true; }
+		allowedTextCases.clear();
-	public int getSequenceLength() { return 1; }
+		allowedTextCases.add(CASE_LOWER);
+		if (language.hasUpperCase()) {
+			allowedTextCases.add(CASE_UPPER);
+		}
+	}
 
-	public boolean shouldAcceptCurrentSuggestion(Language l, int key, boolean hold, boolean repeat) { return hold || !repeat; }
+	@Override final public boolean isABC() { return true; }
-	public boolean shouldTrackUpDown() { return true; }
+	@Override public int getSequenceLength() { return 1; }
-	public boolean shouldTrackLeftRight() { return true; }
+
-	public boolean shouldSelectNextSuggestion() {
+	@Override public boolean shouldAcceptCurrentSuggestion(int key, boolean hold, boolean repeat) { return hold || !repeat; }
+	@Override public boolean shouldTrackUpDown() { return true; }
+	@Override public boolean shouldTrackLeftRight() { return true; }
+	@Override public boolean shouldSelectNextSuggestion() {
 		return shouldSelectNextLetter;
 	}
 }

src/io/github/sspanak/tt9/ime/modes/ModePredictive.java

@@ -32,7 +32,6 @@ public class ModePredictive extends InputMode {
 	private String stem = "";
 
 	// async suggestion handling
-	private Language currentLanguage = null;
 	private String currentInputFieldWord = "";
 	private static Handler handleSuggestionsExternal;
 
@@ -44,10 +43,8 @@ public class ModePredictive extends InputMode {
 	private final String maxEmojiSequence;
 
 
-	ModePredictive(SettingsStore settings) {
+	ModePredictive(SettingsStore settings, Language lang) {
-		allowedTextCases.add(CASE_LOWER);
+		changeLanguage(lang);
-		allowedTextCases.add(CASE_CAPITALIZE);
-		allowedTextCases.add(CASE_UPPER);
 
 		emptyDbWarning = new EmptyDatabaseWarning(settings);
 		this.settings = settings;
@@ -81,13 +78,13 @@ public class ModePredictive extends InputMode {
 
 
 	@Override
-	public boolean onNumber(Language language, int key, boolean hold, int repeat) {
+	public boolean onNumber(int key, boolean hold, int repeat) {
 		if (hold) {
 			// hold to type any digit
 			reset();
 			word = String.valueOf(key);
 		} else if (key == 0 && repeat > 0) {
-			onDouble0(language);
+			onDouble0();
 		} else {
 			// words
 			super.reset();
@@ -102,7 +99,7 @@ public class ModePredictive extends InputMode {
 	 * onDouble0
 	 * Double "0" is a shortcut for the preferred character.
 	 */
-	private void onDouble0(Language language) {
+	private void onDouble0() {
 		try {
 			reset();
 			word = settings.getDoubleZeroChar();
@@ -115,6 +112,19 @@ public class ModePredictive extends InputMode {
 	}
 
 
+	@Override
+	public void changeLanguage(Language language) {
+		super.changeLanguage(language);
+
+		allowedTextCases.clear();
+		allowedTextCases.add(CASE_LOWER);
+		if (language.hasUpperCase()) {
+			allowedTextCases.add(CASE_CAPITALIZE);
+			allowedTextCases.add(CASE_UPPER);
+		}
+	}
+
+
 	@Override
 	public void reset() {
 		super.reset();
@@ -156,7 +166,7 @@ public class ModePredictive extends InputMode {
 	 * Note that you need to manually get the suggestions again to obtain a filtered list.
 	 */
 	@Override
-	public boolean setWordStem(Language language, String wordStem, boolean exact) {
+	public boolean setWordStem(String wordStem, boolean exact) {
 		if (language == null || wordStem == null || wordStem.length() < 1) {
 			return false;
 		}
@@ -202,7 +212,7 @@ public class ModePredictive extends InputMode {
 	 * Similar to "loadSuggestions()", but loads suggestions that are not in the database.
 	 * Returns "false", when there are no static suggestions for the current digitSequence.
 	 */
-	private boolean loadStaticSuggestions(Language language) {
+	private boolean loadStaticSuggestions() {
 		if (digitSequence.equals("0")) {
 			stem = "";
 			suggestions = language.getKeyCharacters(0, false);
@@ -231,8 +241,8 @@ public class ModePredictive extends InputMode {
 	 * See: generatePossibleCompletions()
 	 */
 	@Override
-	public boolean loadSuggestions(Handler handler, Language language, String currentWord) {
+	public boolean loadSuggestions(Handler handler, String currentWord) {
-		if (loadStaticSuggestions(language)) {
+		if (loadStaticSuggestions()) {
 			super.onSuggestionsUpdated(handler);
 			return true;
 		}
@@ -244,7 +254,6 @@ public class ModePredictive extends InputMode {
 
 		handleSuggestionsExternal = handler;
 		currentInputFieldWord = currentWord.toLowerCase(language.getLocale());
-		currentLanguage = language;
 		super.reset();
 
 		DictionaryDb.getSuggestions(
@@ -272,13 +281,13 @@ public class ModePredictive extends InputMode {
 			dbSuggestions = dbSuggestions == null ? new ArrayList<>() : dbSuggestions;
 
 			if (dbSuggestions.size() == 0 && digitSequence.length() > 0) {
-				emptyDbWarning.emitOnce(currentLanguage);
+				emptyDbWarning.emitOnce(language);
-				dbSuggestions = generatePossibleCompletions(currentLanguage, currentInputFieldWord);
+				dbSuggestions = generatePossibleCompletions(currentInputFieldWord);
 			}
 
 			suggestions.clear();
 			suggestStem();
-			suggestions.addAll(generatePossibleStemVariations(currentLanguage, dbSuggestions));
+			suggestions.addAll(generatePossibleStemVariations(dbSuggestions));
 			suggestMoreWords(dbSuggestions);
 
 			ModePredictive.super.onSuggestionsUpdated(handleSuggestionsExternal);
@@ -295,7 +304,7 @@ public class ModePredictive extends InputMode {
 	 * For example, if the word is "missin_" and the last pressed key is "4", the results would be:
 	 * | missing | missinh | missini |
 	 */
-	private ArrayList<String> generatePossibleCompletions(Language language, String baseWord) {
+	private ArrayList<String> generatePossibleCompletions(String baseWord) {
 		ArrayList<String> generatedWords = new ArrayList<>();
 
 		// Make sure the displayed word and the digit sequence, we will be generating suggestions from,
@@ -334,14 +343,14 @@ public class ModePredictive extends InputMode {
 	 * generate: "extrb" and "extrc". This is useful for typing an unknown word, that is similar to
 	 * the ones in the dictionary.
 	 */
-	private ArrayList<String> generatePossibleStemVariations(Language language, ArrayList<String> dbSuggestions) {
+	private ArrayList<String> generatePossibleStemVariations(ArrayList<String> dbSuggestions) {
 		ArrayList<String> variations = new ArrayList<>();
 		if (stem.length() == 0) {
 			return variations;
 		}
 
 		if (isStemFuzzy && stem.length() == digitSequence.length() - 1) {
-			ArrayList<String> allPossibleVariations = generatePossibleCompletions(language, stem);
+			ArrayList<String> allPossibleVariations = generatePossibleCompletions(stem);
 
 			// first add the known words, because it makes more sense to see them first
 			for (String word : allPossibleVariations) {
@@ -391,7 +400,7 @@ public class ModePredictive extends InputMode {
 	 * Bring this word up in the suggestions list next time.
 	 */
 	@Override
-	public void onAcceptSuggestion(Language language, String currentWord) {
+	public void onAcceptSuggestion(String currentWord) {
 		lastAcceptedWord = currentWord;
 		lastAcceptedSequence = digitSequence;
 		reset();
@@ -425,7 +434,7 @@ public class ModePredictive extends InputMode {
 	 * or Dutch words such as: "'s-Hertogenbosch".
 	 */
 	@Override
-	protected String adjustSuggestionTextCase(String word, int newTextCase, Language language) {
+	protected String adjustSuggestionTextCase(String word, int newTextCase) {
 		switch (newTextCase) {
 			case CASE_UPPER:
 				return word.toUpperCase(language.getLocale());
@@ -492,7 +501,7 @@ public class ModePredictive extends InputMode {
 	 * we also increase its' priority. This function determines whether we want to do all this or not.
 	 */
 	@Override
-	public boolean shouldAcceptCurrentSuggestion(Language language, int key, boolean hold, boolean repeat) {
+	public boolean shouldAcceptCurrentSuggestion(int key, boolean hold, boolean repeat) {
 		return
 			hold
 			// Quickly accept suggestions using "space" instead of pressing "ok" then "space"

src/io/github/sspanak/tt9/languages/Language.java

@@ -68,6 +68,11 @@ public class Language {
 	final public boolean isPunctuationPartOfWords() { return isPunctuationPartOfWords; }
 
 
+	final public boolean hasUpperCase() {
+		return abcUpperCaseIcon != 0;
+	}
+
+
 	/* ************ utility ************ */
 
 	/**

src/io/github/sspanak/tt9/preferences/SettingsStore.java

@@ -140,15 +140,19 @@ public class SettingsStore {
 		return prefs.getInt("pref_input_mode", InputMode.MODE_PREDICTIVE);
 	}
 
-	public void saveInputMode(InputMode mode) {
+	public void saveInputMode(int mode) {
-		if (mode == null) {
+		boolean isModeValid = isIntInList(
-			Logger.w("tt9/saveInputMode", "Not saving NULL input mode");
+			mode,
-			return;
+			new ArrayList<>(Arrays.asList(InputMode.MODE_123, InputMode.MODE_PREDICTIVE, InputMode.MODE_ABC)),
-		}
+			"tt9/saveInputMode",
+			"Not saving invalid input mode: " + mode
+		);
 
-		prefsEditor.putInt("pref_input_mode", mode.getId());
+		if (isModeValid) {
+			prefsEditor.putInt("pref_input_mode", mode);
 			prefsEditor.apply();
 		}
+	}
 
 
 	/************* function key settings *************/