From 1a8e34461c3a1afc7bd8a3364c8e22d0c670f21f Mon Sep 17 00:00:00 2001
From: sspanak <doftor.livain@gmail.com>
Date: Tue, 24 Jun 2025 19:40:00 +0300
Subject: [PATCH] fixed the Shift state sometimes not being update after
 holding backspace to delete all text

---
 .../github/sspanak/tt9/ime/TypingHandler.java   | 17 ++++++++++++++++-
 .../github/sspanak/tt9/ime/modes/ModeWords.java |  1 +
 .../tt9/ime/modes/helpers/AutoTextCase.java     |  4 ++++
 .../tt9/preferences/settings/SettingsStore.java |  1 +
 4 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/TypingHandler.java b/app/src/main/java/io/github/sspanak/tt9/ime/TypingHandler.java
index 2b3edc44..cb2a9245 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/TypingHandler.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/TypingHandler.java
@@ -1,6 +1,8 @@
 package io.github.sspanak.tt9.ime;
 
 import android.inputmethodservice.InputMethodService;
+import android.os.Handler;
+import android.os.Looper;
 import android.view.inputmethod.EditorInfo;
 
 import androidx.annotation.NonNull;
@@ -33,6 +35,7 @@ public abstract class TypingHandler extends KeyPadHandler {
 	@NonNull protected TextField textField = new TextField(null, null, null);
 	@NonNull protected TextSelection textSelection = new TextSelection(null);
 	@NonNull protected SuggestionOps suggestionOps = new SuggestionOps(null, null, null, null, null, null);
+	@NonNull private Handler shiftStateDebounceHandler = new Handler(Looper.getMainLooper());
 
 	// input
 	@NonNull protected ArrayList<Integer> allowedInputModes = new ArrayList<>();
@@ -141,6 +144,7 @@ public abstract class TypingHandler extends KeyPadHandler {
 			suggestionOps.commitCurrent(false, true);
 			mInputMode.reset();
 			deleteText(settings.getBackspaceAcceleration() && repeat > 0);
+			updateShiftStateDebounced(mInputMode.getSuggestions().isEmpty(), false);
 		}
 
 		if (settings.getBackspaceRecomposing() && repeat == 0 && noTextSelection && suggestionOps.isEmpty() && !DictionaryLoader.getInstance(this).isRunning()) {
@@ -427,7 +431,12 @@ public abstract class TypingHandler extends KeyPadHandler {
 		String trimmedWord = suggestionOps.getCurrent(mLanguage, mInputMode.getSequenceLength());
 		appHacks.setComposingTextWithHighlightedStem(trimmedWord, mInputMode);
 
-		updateShiftState(mInputMode.getSuggestions().isEmpty(), true);
+		if (mInputMode.getSuggestions().isEmpty()) {
+			updateShiftStateDebounced(true, false);
+		} else {
+			updateShiftStateDebounced(false, true);
+		}
+
 		forceShowWindow();
 	}
 
@@ -440,6 +449,12 @@ public abstract class TypingHandler extends KeyPadHandler {
 	}
 
 
+	protected void updateShiftStateDebounced(boolean determineTextCase, boolean onlyWhenLetters) {
+		shiftStateDebounceHandler.removeCallbacksAndMessages(null);
+		shiftStateDebounceHandler.postDelayed(() -> updateShiftState(determineTextCase, onlyWhenLetters), SettingsStore.SHIFT_STATE_DEBOUNCE_TIME);
+	}
+
+
 	protected void updateShiftState(boolean determineTextCase, boolean onlyWhenLetters) {
 		if (onlyWhenLetters && !new Text(suggestionOps.getCurrent()).isAlphabetic()) {
 			return;
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeWords.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeWords.java
index 905bd707..6774d9da 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeWords.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/ModeWords.java
@@ -61,6 +61,7 @@ class ModeWords extends ModeCheonjiin {
 	@Override
 	public boolean onBackspace() {
 		isCursorDirectionForward = false;
+		autoTextCase.doNotSkipNext();
 
 		if (digitSequence.isEmpty()) {
 			clearWordStem();
diff --git a/app/src/main/java/io/github/sspanak/tt9/ime/modes/helpers/AutoTextCase.java b/app/src/main/java/io/github/sspanak/tt9/ime/modes/helpers/AutoTextCase.java
index bacf4147..701d9417 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ime/modes/helpers/AutoTextCase.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ime/modes/helpers/AutoTextCase.java
@@ -100,4 +100,8 @@ public class AutoTextCase {
 	public void skipNext() {
 		skipNext = true;
 	}
+
+	public void doNotSkipNext() {
+		skipNext = false;
+	}
 }
diff --git a/app/src/main/java/io/github/sspanak/tt9/preferences/settings/SettingsStore.java b/app/src/main/java/io/github/sspanak/tt9/preferences/settings/SettingsStore.java
index c6220f80..89fc94a1 100644
--- a/app/src/main/java/io/github/sspanak/tt9/preferences/settings/SettingsStore.java
+++ b/app/src/main/java/io/github/sspanak/tt9/preferences/settings/SettingsStore.java
@@ -20,6 +20,7 @@ public class SettingsStore extends SettingsHotkeys {
 	public final static int DICTIONARY_IMPORT_BATCH_SIZE = 5000; // words
 	public final static int DICTIONARY_IMPORT_PROGRESS_UPDATE_TIME = 250; // ms
 	public final static int RESIZE_THROTTLING_TIME = 60; // ms
+	public final static int SHIFT_STATE_DEBOUNCE_TIME = 175; // ms
 	public final static byte SLOW_QUERY_TIME = 50; // ms
 	public final static int SLOW_QUERY_TIMEOUT = 3000; // ms
 	public final static float SOFT_KEY_AMOUNT_OF_KEY_SIZE_FOR_SWIPE = 0.5f; // 1 = full key size