fixed inconsistent text case visualization and optimized the rendering speed

app/src/main/java/io/github/sspanak/tt9/ime/HotkeyHandler.java

@@ -234,9 +234,7 @@ public abstract class HotkeyHandler extends CommandHandler {
 		mInputMode.onAcceptSuggestion(suggestionOps.acceptIncomplete());
 		resetKeyRepeat();
 
-		if (settings.isMainLayoutNumpad()) {
+		mainView.renderDynamicKeys();
-			mainView.renderKeys();
-		}
 
 		return true;
 	}
@@ -273,9 +271,7 @@ public abstract class HotkeyHandler extends CommandHandler {
 				.loadSuggestions(filter);
 		}
 
-		if (settings.isMainLayoutNumpad()) {
+		mainView.renderDynamicKeys();
-			mainView.renderKeys();
-		}
 
 		return true;
 	}
@@ -292,9 +288,7 @@ public abstract class HotkeyHandler extends CommandHandler {
 
 		backward = isLanguageRTL != backward;
 		scrollSuggestions(backward);
-		if (settings.isMainLayoutNumpad()) {
+		mainView.renderDynamicKeys();
-			mainView.renderKeys();
-		}
 
 		return true;
 	}

app/src/main/java/io/github/sspanak/tt9/ime/TypingHandler.java

@@ -120,9 +120,7 @@ public abstract class TypingHandler extends KeyPadHandler {
 
 		if (appHacks.onBackspace(settings, mInputMode)) {
 			mInputMode.reset();
-			if (settings.isMainLayoutNumpad()) {
+			mainView.renderDynamicKeys();
-				mainView.renderKeys();
-			}
 			return false;
 		}
 
@@ -147,6 +145,7 @@ public abstract class TypingHandler extends KeyPadHandler {
 		if (settings.getBackspaceRecomposing() && repeat == 0 && noTextSelection && suggestionOps.isEmpty() && !DictionaryLoader.getInstance(this).isRunning()) {
 			final String previousWord = mInputMode.recompose();
 			if (textField.recompose(previousWord)) {
+				mInputMode.setOnEndRecomposing(this::updateShiftState);
 				getSuggestions(previousWord);
 			} else {
 				mInputMode.reset();
@@ -233,9 +232,7 @@ public abstract class TypingHandler extends KeyPadHandler {
 		autoCorrectSpace(text, true, -1);
 
 		forceShowWindow();
-		if (settings.isMainLayoutNumpad()) {
+		mainView.renderDynamicKeys();
-			mainView.renderKeys();
-		}
 
 		return true;
 	}
@@ -375,9 +372,7 @@ public abstract class TypingHandler extends KeyPadHandler {
 		mInputMode.onAcceptSuggestion(word, true);
 		autoCorrectSpace(word, false, mInputMode.getSequence().isEmpty() ? -1 : mInputMode.getSequence().charAt(0) - '0');
 		mInputMode.determineNextWordTextCase(-1);
-		if (settings.isMainLayoutNumpad()) {
+		updateShiftState();
-			mainView.renderKeys();
-		}
 	}
 
 	private void onAcceptSuggestionsDelayed(String word) {
@@ -390,9 +385,6 @@ public abstract class TypingHandler extends KeyPadHandler {
 		if (!word.isEmpty()) {
 			autoCorrectSpace(word, true, fromKey);
 			resetKeyRepeat();
-			if (settings.isMainLayoutNumpad()) {
-				mainView.renderKeys();
-			}
 		}
 	}
 
@@ -439,13 +431,9 @@ public abstract class TypingHandler extends KeyPadHandler {
 		String trimmedWord = suggestionOps.getCurrent(mLanguage, mInputMode.getSequenceLength());
 		appHacks.setComposingTextWithHighlightedStem(trimmedWord, mInputMode);
 
-		if (new Text(suggestionOps.getCurrent()).isAlphabetic()) {
+		if (!suggestionOps.isEmpty() && new Text(suggestionOps.getCurrent()).isAlphabetic()) {
-			setStatusIcon(mInputMode, mLanguage);
+			updateShiftState();
-			if (settings.isMainLayoutNumpad()) {
-				mainView.renderKeys();
 		}
-		}
-
 		forceShowWindow();
 	}
 
@@ -456,4 +444,13 @@ public abstract class TypingHandler extends KeyPadHandler {
 		mInputMode.setWordStem(suggestionOps.getCurrent(), true);
 		appHacks.setComposingTextWithHighlightedStem(suggestionOps.getCurrent(), mInputMode);
 	}
+
+
+	protected void updateShiftState() {
+		setStatusIcon(mInputMode, mLanguage);
+		mainView.renderDynamicKeys();
+		if (!mainView.isTextEditingPaletteShown() && !mainView.isCommandPaletteShown()) {
+			statusBar.setText(mInputMode);
+		}
+	}
 }

app/src/main/java/io/github/sspanak/tt9/ime/UiHandler.java

@@ -79,6 +79,10 @@ abstract class UiHandler extends AbstractHandler {
 
 
 	protected void setStatusIcon(@Nullable InputMode mode, @Nullable Language language) {
+		if (!settings.isStatusIconEnabled()) {
+			return;
+		}
+
 		final int displayTextCase = getDisplayTextCase(language, mode != null ? mode.getTextCase() : InputMode.CASE_UNDEFINED);
 		final int resId = new StatusIcon(settings, mode, language, displayTextCase).resourceId;
 		if (resId == 0) {

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

@@ -39,6 +39,7 @@ abstract public class InputMode {
 	@NonNull protected String digitSequence = "";
 	protected final boolean isEmailMode;
 	@NonNull protected Language language = new NullLanguage();
+	@NonNull protected Runnable onEndRecomposing = () -> {};
 	protected final SettingsStore settings;
 	@NonNull protected final ArrayList<String> suggestions = new ArrayList<>();
 	@NonNull protected Runnable onSuggestionsUpdated = () -> {};
@@ -164,6 +165,7 @@ abstract public class InputMode {
 
 	public void beforeDeleteText() {}
 	public String recompose() { return null; }
+	public void setOnEndRecomposing(Runnable r) { onEndRecomposing = r != null ? r : () -> {}; }
 	public void replaceLastLetter() {}
 
 	public void reset() {

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

@@ -33,6 +33,7 @@ class ModeWords extends ModeCheonjiin {
 	// text analysis tools
 	private final AutoTextCase autoTextCase;
 	private boolean isCursorDirectionForward = false;
+	private boolean isRecomposing = false;
 	private int textFieldTextCase;
 
 
@@ -76,6 +77,7 @@ class ModeWords extends ModeCheonjiin {
 
 		if (digitSequence.isEmpty()) {
 			clearWordStem();
+			endRecomposing();
 		} else if (stem.length() > digitSequence.length()) {
 			stem = stem.substring(0, digitSequence.length());
 		}
@@ -123,6 +125,7 @@ class ModeWords extends ModeCheonjiin {
 
 	@Override
 	public String recompose() {
+		isRecomposing = false;
 		if (!language.hasSpaceBetweenWords() || language.isTranscribed()) {
 			return null;
 		}
@@ -144,6 +147,7 @@ class ModeWords extends ModeCheonjiin {
 			reset();
 			digitSequence = language.getDigitSequenceForWord(previousWord);
 			textCase = new Text(language, previousWord).getTextCase();
+			isRecomposing = true;
 		} catch (InvalidLanguageCharactersException e) {
 			Logger.d(LOG_TAG, "Not recomposing word: '" + previousWord + "'. " + e.getMessage());
 			return null;
@@ -152,6 +156,14 @@ class ModeWords extends ModeCheonjiin {
 		return previousWord;
 	}
 
+	private void endRecomposing() {
+		if (isRecomposing) {
+			isRecomposing = false;
+			textCase = settings.getTextCase();
+			onEndRecomposing.run();
+		}
+	}
+
 	@Override
 	public void reset() {
 		basicReset();
@@ -315,6 +327,7 @@ class ModeWords extends ModeCheonjiin {
 			clearLastAcceptedWord();
 		} else {
 			reset();
+			endRecomposing();
 		}
 		stem = "";
 

app/src/main/java/io/github/sspanak/tt9/ui/main/BaseMainLayout.java

@@ -16,6 +16,7 @@ import androidx.annotation.RequiresApi;
 import androidx.core.view.WindowInsetsCompat;
 
 import java.util.ArrayList;
+import java.util.HashSet;
 
 import io.github.sspanak.tt9.R;
 import io.github.sspanak.tt9.ime.TraditionalT9;
@@ -32,6 +33,7 @@ abstract class BaseMainLayout {
 
 	protected View view = null;
 	@NonNull protected final ArrayList<SoftKey> keys = new ArrayList<>();
+	@NonNull protected final HashSet<Integer> dynamicKeys = new HashSet<>();
 
 
 	BaseMainLayout(TraditionalT9 tt9, int xml) {
@@ -311,11 +313,26 @@ abstract class BaseMainLayout {
 	abstract void render();
 
 	/**
-	 * Run render only on the keys, for example, to refresh their state.
+	 * Render specific keys to update their state. If the list is empty, no keys are rendered. If the
+	 * list is null, all keys are rendered.
 	 */
-	void renderKeys() {
+	private void renderKeys(@Nullable HashSet<Integer> keyIds) {
+		if (keyIds != null && keyIds.isEmpty()) {
+			return;
+		}
+
 		for (SoftKey key : getKeys()) {
+			if (keyIds == null || keyIds.contains(key.getId())) {
 				key.render();
 			}
 		}
+	}
+
+	void renderKeys() {
+		renderKeys(null);
+	}
+
+	void renderDynamicKeys() {
+		renderKeys(dynamicKeys);
+	}
 }

app/src/main/java/io/github/sspanak/tt9/ui/main/MainLayoutNumpad.java

@@ -30,6 +30,8 @@ class MainLayoutNumpad extends BaseMainLayout {
 
 	MainLayoutNumpad(TraditionalT9 tt9) {
 		super(tt9, R.layout.main_numpad);
+		dynamicKeys.add(R.id.soft_key_filter);
+		dynamicKeys.add(R.id.soft_key_shift);
 	}
 
 

app/src/main/java/io/github/sspanak/tt9/ui/main/MainView.java

@@ -18,7 +18,6 @@ public class MainView {
 
 	protected MainView(TraditionalT9 tt9) {
 		this.tt9 = tt9;
-
 		forceCreate();
 	}
 
@@ -78,13 +77,13 @@ public class MainView {
 		main.render();
 	}
 
-	public void renderKeys() {
+	public void renderDynamicKeys() {
 		if (main == null) {
-			Logger.e(LOG_TAG, "Cannot render keys for a null MainView.");
+			Logger.e(LOG_TAG, "Cannot render dynamic keys for a null MainView.");
 			return;
 		}
 
-		main.renderKeys();
+		main.renderDynamicKeys();
 	}
 
 	public void showCommandPalette() {