enabled single Latin letters in Ideographic modes, when there is no dictionary loaded

app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeIdeograms.java

@@ -122,7 +122,7 @@ public class ModeIdeograms extends ModeWords {
 	@Override
 	public boolean shouldAcceptPreviousSuggestion(String s) {
 		return
-			!digitSequence.isEmpty()
+			digitSequence.length() > 1
 			&& predictions.noDbWords()
 			&& !digitSequence.equals(EMOJI_SEQUENCE)
 			&& !digitSequence.equals(PUNCTUATION_SEQUENCE)

app/src/main/java/io/github/sspanak/tt9/ime/modes/predictions/IdeogramPredictions.java

@@ -49,6 +49,10 @@ public class IdeogramPredictions extends WordPredictions {
 		transcriptions = onlyExactMatches ? reduceFuzzyMatches(dbWords, SettingsStore.SUGGESTIONS_MAX) : dbWords;
 		words = new ArrayList<>(transcriptions);
 		areThereDbWords = !words.isEmpty();
+		if (!areThereDbWords) {
+			onNoWords();
+		}
+
 		onWordsChanged.run();
 	}
 
@@ -60,6 +64,14 @@ public class IdeogramPredictions extends WordPredictions {
 	}
 
 
+	protected void onNoWords() {
+		if (digitSequence.length() == 1) {
+			transcriptions = generateWordVariations(null);
+			words = new ArrayList<>(transcriptions);
+		}
+	}
+
+
 	@Override
 	@NonNull
 	protected String getPenultimateWord(@NonNull String currentWord) {
@@ -164,6 +176,10 @@ public class IdeogramPredictions extends WordPredictions {
 	 * Example operation: [SHIWU食物, SHIWU事物, SHIWU事务, SHIZU十足] -> [SHIWU, SHIZU]
 	 */
 	public void stripNativeWords() {
+		if (!areThereDbWords) {
+			return;
+		}
+
 		HashSet<String> uniqueTranscriptions = new HashSet<>();
 
 		for (int i = 0; i < transcriptions.size(); i++) {
@@ -191,6 +207,10 @@ public class IdeogramPredictions extends WordPredictions {
 	 * Example operation: [SHIWU食物, SHIZU十足] -> [食物, 十足]
 	 */
 	public void stripTranscriptions() {
+		if (!areThereDbWords) {
+			return;
+		}
+
 		words.clear();
 		for (int i = 0; i < transcriptions.size(); i++) {
 			String transcription = transcriptions.get(i);

app/src/main/java/io/github/sspanak/tt9/ime/modes/predictions/KanaPredictions.java

@@ -2,6 +2,8 @@ package io.github.sspanak.tt9.ime.modes.predictions;
 
 import androidx.annotation.NonNull;
 
+import java.util.ArrayList;
+
 import io.github.sspanak.tt9.ime.helpers.TextField;
 import io.github.sspanak.tt9.languages.exceptions.InvalidLanguageCharactersException;
 import io.github.sspanak.tt9.preferences.settings.SettingsStore;
@@ -51,4 +53,12 @@ public class KanaPredictions extends IdeogramPredictions {
 		String sequence = SEQUENCE_PREFIX + language.getDigitSequenceForWord(stripStemPrefix(transcription));
 		super.onAccept(transcription + word, sequence);
 	}
+
+	@Override
+	protected void onNoWords() {
+		if (digitSequence.length() == 2) {
+			transcriptions = generateWordVariations(null);
+			words = new ArrayList<>(transcriptions);
+		}
+	}
 }