added the TAB key

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

@@ -90,6 +90,10 @@ public abstract class HotkeyHandler extends CommandHandler {
 			return onKeyScrollSuggestion(validateOnly, false);
 		}
 
+		if (keyCode == settings.getKeyTab()) {
+			return onTab(validateOnly);
+		}
+
 		return false;
 	}
 
@@ -241,4 +245,23 @@ public abstract class HotkeyHandler extends CommandHandler {
 
 		return true;
 	}
+
+
+	public boolean onTab(boolean validateOnly) {
+		if (shouldBeOff()) {
+			return false;
+		}
+
+		if (validateOnly) {
+			return true;
+		}
+
+		if (inputType.isMultilineText()) {
+			return onText("\t", validateOnly);
+		} else {
+			textField.sendDownUpKeyEvents(KeyEvent.KEYCODE_TAB);
+		}
+
+		return true;
+	}
 }

app/src/main/java/io/github/sspanak/tt9/ime/modes/Mode123.java

@@ -102,15 +102,16 @@ public class Mode123 extends ModePassthrough {
 	/**
 	 * shouldIgnoreText
 	 * Since this is a numeric mode, we allow typing only numbers and:
-	 * 	1. In numeric fields, we must allow math chars
-	 * 	2. In dialer fields, we must allow various punctuation chars, because they are used as dialing shortcuts
-	 * 	at least in Japan.
-	 * More info and discussion: <a href="https://github.com/sspanak/tt9/issues/241">issue 241 on Github</a>.
+	 * 	1. TAB
+	 * 	2. Math chars for numeric fields
+	 * 	3. Various punctuation chars for dialer fields, because they are used as dialing shortcuts
+	 * 	at least in Japan. More info and discussion: <a href="https://github.com/sspanak/tt9/issues/241">issue 241 on Github</a>.
 	 */
 	@Override public boolean shouldIgnoreText(String text) {
 		return
 			text == null
 			|| text.length() != 1
+			|| text.charAt(0) == 9
 			|| !(
 				(text.charAt(0) > 31 && text.charAt(0) < 65)
 				|| (text.charAt(0) > 90 && text.charAt(0) < 97)

app/src/main/java/io/github/sspanak/tt9/preferences/helpers/Hotkeys.java

@@ -74,7 +74,8 @@ public class Hotkeys {
 			previousSuggestion,
 			nextSuggestion,
 			KeyEvent.KEYCODE_POUND,
-			-KeyEvent.KEYCODE_POUND // negative means "hold"
+			-KeyEvent.KEYCODE_POUND, // negative means "hold"
+			KeyEvent.KEYCODE_UNKNOWN // unassigned
 		);
 	}
 

app/src/main/java/io/github/sspanak/tt9/preferences/screens/hotkeys/HotkeysScreen.java

@@ -28,6 +28,7 @@ public class HotkeysScreen extends BaseScreenFragment {
 			findPreference(SectionKeymap.ITEM_NEXT_SUGGESTION),
 			findPreference(SectionKeymap.ITEM_NEXT_INPUT_MODE),
 			findPreference(SectionKeymap.ITEM_NEXT_LANGUAGE),
+			findPreference(SectionKeymap.ITEM_TAB),
 		};
 		SectionKeymap section = new SectionKeymap(Arrays.asList(dropDowns), activity);
 		section.populate().activate();

app/src/main/java/io/github/sspanak/tt9/preferences/screens/hotkeys/SectionKeymap.java

@@ -20,6 +20,7 @@ public class SectionKeymap {
 	public static final String ITEM_NEXT_SUGGESTION = "key_next_suggestion";
 	public static final String ITEM_NEXT_INPUT_MODE = "key_next_input_mode";
 	public static final String ITEM_NEXT_LANGUAGE = "key_next_language";
+	public static final String ITEM_TAB = "key_tab";
 
 	private final Hotkeys hotkeys;
 	private final Collection<DropDownPreference> items;

app/src/main/java/io/github/sspanak/tt9/preferences/settings/SettingsHotkeys.java

@@ -20,7 +20,8 @@ class SettingsHotkeys extends SettingsHacks {
 		int previousSuggestion,
 		int nextSuggestion,
 		int nextInputMode,
-		int nextLanguage
+		int nextLanguage,
+		int tab
 	) {
 		prefsEditor
 			.putString(SectionKeymap.ITEM_BACKSPACE, String.valueOf(backspace))
@@ -31,6 +32,7 @@ class SettingsHotkeys extends SettingsHacks {
 			.putString(SectionKeymap.ITEM_NEXT_SUGGESTION, String.valueOf(nextSuggestion))
 			.putString(SectionKeymap.ITEM_NEXT_INPUT_MODE, String.valueOf(nextInputMode))
 			.putString(SectionKeymap.ITEM_NEXT_LANGUAGE, String.valueOf(nextLanguage))
+			.putString(SectionKeymap.ITEM_TAB, String.valueOf(tab))
 			.putBoolean("hotkeys_v2_initialized", true)
 			.apply();
 	}
@@ -65,4 +67,7 @@ class SettingsHotkeys extends SettingsHacks {
 	public int getKeyCommandPalette() {
 		return getFunctionKey(SectionKeymap.ITEM_COMMAND_PALETTE);
 	}
+	public int getKeyTab() {
+		return getFunctionKey(SectionKeymap.ITEM_TAB);
+	}
 }

app/src/main/java/io/github/sspanak/tt9/ui/main/keys/SoftKeyAddWord.java

@@ -1,27 +0,0 @@
-package io.github.sspanak.tt9.ui.main.keys;
-
-import android.content.Context;
-import android.util.AttributeSet;
-
-public class SoftKeyAddWord extends SoftKey {
-	public SoftKeyAddWord(Context context) { super(context); }
-	public SoftKeyAddWord(Context context, AttributeSet attrs) { super(context, attrs); }
-	public SoftKeyAddWord(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); }
-
-	@Override
-	protected boolean handleRelease() {
-		if (validateTT9Handler()) {
-			tt9.addWord();
-			return true;
-		}
-		return false;
-	}
-
-	@Override
-	public void render() {
-		super.render();
-		if (tt9 != null) {
-			setEnabled(!tt9.isVoiceInputActive());
-		}
-	}
-}

app/src/main/java/io/github/sspanak/tt9/ui/main/keys/SoftKeyLF2.java

@@ -0,0 +1,47 @@
+package io.github.sspanak.tt9.ui.main.keys;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import io.github.sspanak.tt9.R;
+import io.github.sspanak.tt9.ui.Vibration;
+
+public class SoftKeyLF2 extends SoftKey {
+	public SoftKeyLF2(Context context) { super(context); }
+	public SoftKeyLF2(Context context, AttributeSet attrs) { super(context, attrs); }
+	public SoftKeyLF2(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); }
+
+	@Override
+	protected void handleHold() {
+		if (!validateTT9Handler()) {
+			return;
+		}
+
+		preventRepeat();
+		vibrate(Vibration.getHoldVibration());
+		tt9.addWord();
+	}
+
+	@Override
+	protected boolean handleRelease() {
+		return validateTT9Handler() && tt9.onTab(false);
+	}
+
+	@Override
+	protected String getTitle() {
+		return "＋";
+	}
+
+	@Override
+	protected String getSubTitle() {
+		return getContext().getString(R.string.key_tab).toUpperCase();
+	}
+
+	@Override
+	public void render() {
+		super.render();
+		if (tt9 != null) {
+			setEnabled(!tt9.isVoiceInputActive());
+		}
+	}
+}

app/src/main/res/layout/panel_numpad.xml

@@ -57,14 +57,12 @@
 		android:layout_height="@dimen/numpad_key_height"
 		android:layoutDirection="ltr">
 
-		<io.github.sspanak.tt9.ui.main.keys.SoftKeyAddWord
+		<io.github.sspanak.tt9.ui.main.keys.SoftKeyLF2
 			android:id="@+id/soft_key_add_word"
 			style="@android:style/Widget.Holo.Button.Borderless"
 			android:layout_width="0dp"
 			android:layout_height="match_parent"
-			android:layout_weight="@dimen/numpad_control_key_layout_weight"
-			android:text="＋"
-			android:textStyle="bold" />
+			android:layout_weight="@dimen/numpad_control_key_layout_weight" />
 
 		<View
 			android:id="@+id/separator_2_1"

app/src/main/res/values/strings.xml

@@ -157,6 +157,7 @@
 	<string name="key_menu" translatable="false">Menu</string>
 	<string name="key_soft_left" translatable="false">Left Func</string>
 	<string name="key_soft_right" translatable="false">Right Func</string>
+	<string name="key_tab" translatable="false">Tab</string>
 	<string name="key_volume_mute">Volume Mute</string>
 	<string name="key_volume_down">Volume Down</string>
 	<string name="key_volume_up">Volume Up</string>

app/src/main/res/xml/prefs_screen_hotkeys.xml

@@ -34,6 +34,10 @@
 		app:key="key_next_input_mode"
 		app:title="@string/function_next_mode" />
 
+	<DropDownPreference
+		app:key="key_tab"
+		app:title="@string/key_tab" />
+
 	<Preference
 		app:key="reset_keys"
 		app:title="@string/function_reset_keys_title" />