added support for RustDesk

app/src/main/java/io/github/sspanak/tt9/hacks/AppHacks.java

@@ -70,6 +70,19 @@ public class AppHacks {
 	}
 
 
+	/**
+	 * Handles applications that always report no text around the cursor, preventing the cursor from
+	 * moving the usual way.
+	 */
+	public boolean onMoveCursor(boolean backward) {
+		if (inputType.isRustDesk() || inputType.isTermux()) {
+			return sendDownUpKeyEvents(backward ? KeyEvent.KEYCODE_DPAD_LEFT : KeyEvent.KEYCODE_DPAD_RIGHT);
+		}
+
+		return false;
+	}
+
+
 	/**
 	 * Performs extra operations when the cursor moves and returns "true" if the selection was handled, "false" otherwise.
 	 */

app/src/main/java/io/github/sspanak/tt9/hacks/InputType.java

@@ -65,6 +65,21 @@ public class InputType extends StandardInputType {
 	}
 
 
+	/**
+	 * RustDesk does not support composing text when connected to a remote computer. This detects the
+	 * "remote input field", so that we can prevent inserting any composing text, but still perform
+	 * the composing operation behind the scenes.
+	 */
+	public boolean isRustDesk() {
+		final int OPTIONS_MASK = EditorInfo.IME_ACTION_NONE | EditorInfo.IME_FLAG_NO_FULLSCREEN;
+
+		return isAppField(
+			"com.carriez.flutter_hbb",
+			EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE | EditorInfo.TYPE_TEXT_FLAG_NO_SUGGESTIONS
+		) && (field.imeOptions & OPTIONS_MASK) == OPTIONS_MASK;
+	}
+
+
 	/**
 	 * Simulate the behavior of the Sonim native keyboard. In search fields with integrated lists,
 	 * ENTER is used to select an item from the list. But some of them have actionId = NEXT, instead of NONE,

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

@@ -102,7 +102,7 @@ public abstract class HotkeyHandler extends CommandHandler {
 
 
 	public boolean onKeyMoveCursor(boolean backward) {
-		return textField.moveCursor(backward);
+		return appHacks.onMoveCursor(backward) || textField.moveCursor(backward);
 	}
 
 

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

@@ -77,6 +77,10 @@ public abstract class TypingHandler extends KeyPadHandler {
 
 
 	protected void setInputField(InputConnection connection, EditorInfo field) {
+		if (textField.equals(connection, field)) {
+			return;
+		}
+
 		currentInputConnection = connection;
 		inputType = new InputType(currentInputConnection, field);
 		textField = new TextField(currentInputConnection, field);
@@ -198,7 +202,7 @@ public abstract class TypingHandler extends KeyPadHandler {
 
 
 	private void autoCorrectSpace(String currentWord, boolean isWordAcceptedManually, int nextKey) {
-		if (mInputMode.shouldDeletePrecedingSpace(inputType)) {
+		if (!inputType.isRustDesk() && mInputMode.shouldDeletePrecedingSpace(inputType)) {
 			textField.deletePrecedingSpace(currentWord);
 		}
 

app/src/main/java/io/github/sspanak/tt9/ime/helpers/TextField.java

@@ -27,7 +27,7 @@ public class TextField extends InputField {
 		super(inputConnection, inputField);
 
 		InputType inputType = new InputType(inputConnection, inputField);
-		isComposingSupported = !inputType.isNumeric() && !inputType.isLimited();
+		isComposingSupported = !inputType.isNumeric() && !inputType.isLimited() && !inputType.isRustDesk();
 	}