This patch adds a BB10-style swipe left gesture for word deletion to the FUTO Keyboard (LatinIME).

Swipe left anywhere on the keyboard to delete text using BB10-style behavior:

• If text is selected, delete the selection
• If at the beginning of text with whitespace ahead, trim leading whitespace
• If only whitespace before cursor, delete all leading whitespace
• Otherwise, delete trailing whitespace and characters back to space or sentence boundary (stops at periods/semicolons with content before them)

The feature can be enabled/disabled in Settings → Typing → "Swipe Left Delete" (enabled by default).

This patch is based on:

• Repository: https://gitlab.futo.org/keyboard/latinime.git
• Branch: master
• Commit: c92299b5c2a839e8f4ca1a9a70b569833b22e975
• Date: December 2, 2025
• Version Tag: 0.1.26.2-30-gc92299b5c (30 commits after v0.1.26.2)
• Commit Message: "Update submodules"

# Clone the FUTO Keyboard repository
git clone https://gitlab.futo.org/keyboard/latinime.git latinime
cd latinime

# Checkout the specific commit this patch was created against
git checkout c92299b5c2a839e8f4ca1a9a70b569833b22e975

# Apply the patch
git apply /path/to/swipe-left-delete-clean.patch
# Or if using patch command:
patch -p1 < /path/to/swipe-left-delete-clean.patch

# Check the status
git status
# Review the changes
git diff

# Make sure you have Java 17 and Android SDK configured
./gradlew assembleUnstableDebug
# The APK will be in:
# build/outputs/apk/unstable/debug/latinime-unstable-debug.apk

The patch modifies the following files:

1. java/res/values/strings-uix.xml - UI strings for settings toggle
2. java/src/org/futo/inputmethod/engine/IMEInterface.kt - Interface definition
3. java/src/org/futo/inputmethod/engine/general/ActionInputTransactionIME.kt - Implementation stub
4. java/src/org/futo/inputmethod/engine/general/GeneralIME.kt - Main implementation
5. java/src/org/futo/inputmethod/engine/general/JapaneseIME.kt - Implementation stub
6. java/src/org/futo/inputmethod/keyboard/KeyboardActionListener.java - Interface definition
7. java/src/org/futo/inputmethod/keyboard/PointerTracker.java - Gesture detection
8. java/src/org/futo/inputmethod/latin/LatinIMELegacy.java - Legacy IME bridge
9. java/src/org/futo/inputmethod/latin/inputlogic/InputLogic.java - Deletion logic (145 lines added)
10. java/src/org/futo/inputmethod/latin/settings/Settings.java - Settings constant
11. java/src/org/futo/inputmethod/latin/settings/SettingsValues.java - Settings field
12. java/src/org/futo/inputmethod/latin/uix/Settings.kt - DataStore settings key
13. java/src/org/futo/inputmethod/latin/uix/settings/pages/Typing.kt - Settings UI toggle

If you want to apply this patch to a newer version of the codebase:

# Checkout the version you want
git checkout master # or any other branch/tag
# Try to apply the patch
git apply /path/to/swipe-left-delete-clean.patch
# If there are conflicts, you can use 3-way merge:
git apply -3 /path/to/swipe-left-delete-clean.patch
# Or manually resolve conflicts

1. Install the built APK on your Android device
2. Enable "Swipe Left Delete" in Settings → Typing (it's enabled by default)
3. Open any text field and type some text
4. Swipe left anywhere on the keyboard to delete words
5. Test edge cases:
   • Selection deletion
   • Deletion at sentence boundaries (periods, semicolons)
   • Leading whitespace trimming
   • Multiple word deletion

• Java 17 (use SDKMAN or similar for version management)
• Android SDK with API level 34
• Gradle (included via wrapper)

This patch maintains the same license as the original FUTO Keyboard project.

https://github.com/JavaScriptDude/FutoBB10