Ellipsis for "Space" key for triggering the IME switcher

bug:5136497
Change-Id: Iab7c68135500e9fed212521484090b52943550ca

java/src/com/android/inputmethod/keyboard/Key.java

@@ -113,6 +113,8 @@ public class Key {
     private boolean mHighlightOn;
     /** Key is enabled and responds on press */
     private boolean mEnabled = true;
+    /** Whether this key needs to show the "..." popup hint for special purposes */
+    private boolean mNeedsSpecialPopupHint;
 
     // keyWidth constants
     private static final int KEYWIDTH_FILL_RIGHT = 0;
@@ -402,6 +404,14 @@ public class Key {
         return (mLabelOption & LABEL_OPTION_HAS_POPUP_HINT) != 0;
     }
 
+    public void setNeedsSpecialPopupHint(boolean needsSpecialPopupHint) {
+        mNeedsSpecialPopupHint = needsSpecialPopupHint;
+    }
+
+    public boolean needsSpecialPopupHint() {
+        return mNeedsSpecialPopupHint;
+    }
+
     public boolean hasUppercaseLetter() {
         return (mLabelOption & LABEL_OPTION_HAS_UPPERCASE_LETTER) != 0;
     }

java/src/com/android/inputmethod/keyboard/KeyboardView.java

@@ -657,7 +657,8 @@ public class KeyboardView extends View implements PointerTracker.DrawingProxy {
         }
 
         // Draw popup hint "..." at the bottom right corner of the key.
-        if (key.hasPopupHint() && key.mPopupCharacters != null && key.mPopupCharacters.length > 0) {
+        if ((key.hasPopupHint() && key.mPopupCharacters != null && key.mPopupCharacters.length > 0)
+                || key.needsSpecialPopupHint()) {
             paint.setTextSize(params.mKeyHintLetterSize);
             paint.setColor(params.mKeyHintLabelColor);
             paint.setTextAlign(Align.CENTER);

java/src/com/android/inputmethod/keyboard/LatinKeyboard.java

@@ -31,10 +31,12 @@ import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.text.TextUtils;
 
+import com.android.inputmethod.compat.InputMethodManagerCompatWrapper;
 import com.android.inputmethod.keyboard.internal.KeyboardBuilder;
 import com.android.inputmethod.keyboard.internal.KeyboardParams;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.SubtypeSwitcher;
+import com.android.inputmethod.latin.Utils;
 
 import java.lang.ref.SoftReference;
 import java.util.Arrays;
@@ -59,6 +61,7 @@ public class LatinKeyboard extends Keyboard {
     private float mSpacebarTextFadeFactor = 0.0f;
     private final HashMap<Integer, SoftReference<BitmapDrawable>> mSpaceDrawableCache =
             new HashMap<Integer, SoftReference<BitmapDrawable>>();
+    private final boolean mIsSpacebarTriggeringPopupByLongPress;
 
     /* Shortcut key and its icons if available */
     private final Key mShortcutKey;
@@ -85,6 +88,9 @@ public class LatinKeyboard extends Keyboard {
 
         mShortcutKey = params.mShortcutKey;
         mEnabledShortcutIcon = (mShortcutKey != null) ? mShortcutKey.getIcon() : null;
+        final int longPressSpaceKeyTimeout =
+                mRes.getInteger(R.integer.config_long_press_space_key_timeout);
+        mIsSpacebarTriggeringPopupByLongPress = (longPressSpaceKeyTimeout > 0);
 
         final TypedArray a = context.obtainStyledAttributes(
                 null, R.styleable.LatinKeyboard, R.attr.latinKeyboardStyle, R.style.LatinKeyboard);
@@ -179,8 +185,13 @@ public class LatinKeyboard extends Keyboard {
     }
 
     private void updateSpacebarForLocale(boolean isAutoCorrection) {
-        if (mSpaceKey == null)
-            return;
+        if (mSpaceKey == null) return;
+        final InputMethodManagerCompatWrapper imm = InputMethodManagerCompatWrapper.getInstance();
+        if (imm == null) return;
+        // The "..." popup hint for triggering something by a long-pressing the spacebar
+        final boolean shouldShowInputMethodPicker = mIsSpacebarTriggeringPopupByLongPress
+                && Utils.hasMultipleEnabledIMEsOrSubtypes(imm, true /* include aux subtypes */);
+        mSpaceKey.setNeedsSpecialPopupHint(shouldShowInputMethodPicker);
         // If application locales are explicitly selected.
         if (mSubtypeSwitcher.needsToDisplayLanguage()) {
             mSpaceKey.setIcon(getSpaceDrawable(

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -1181,8 +1181,7 @@ public class LatinIME extends InputMethodServiceCompatWrapper implements Keyboar
         if (isShowingOptionDialog()) return;
         if (InputMethodServiceCompatWrapper.CAN_HANDLE_ON_CURRENT_INPUT_METHOD_SUBTYPE_CHANGED) {
             showSubtypeSelectorAndSettings();
-        } else if (Utils.hasMultipleEnabledIMEsOrSubtypes(mImm,
-                false /* should exclude auxiliary subtypes */)) {
+        } else if (Utils.hasMultipleEnabledIMEsOrSubtypes(mImm, false /* exclude aux subtypes */)) {
             showOptionsMenu();
         } else {
             launchSettings();
@@ -1197,8 +1196,7 @@ public class LatinIME extends InputMethodServiceCompatWrapper implements Keyboar
         if (isShowingOptionDialog()) return false;
         switch (requestCode) {
         case CODE_SHOW_INPUT_METHOD_PICKER:
-            if (Utils.hasMultipleEnabledIMEsOrSubtypes(mImm,
-                    true /* should include auxiliary subtypes */)) {
+            if (Utils.hasMultipleEnabledIMEsOrSubtypes(mImm, true /* include aux subtypes */)) {
                 mImm.showInputMethodPicker();
                 return true;
             }

java/src/com/android/inputmethod/latin/Utils.java

@@ -111,8 +111,9 @@ public class Utils {
         }
     }
 
-    public static boolean hasMultipleEnabledIMEsOrSubtypes(InputMethodManagerCompatWrapper imm,
-            boolean shouldIncludeAuxiliarySubtypes) {
+    public static boolean hasMultipleEnabledIMEsOrSubtypes(
+            final InputMethodManagerCompatWrapper imm,
+            final boolean shouldIncludeAuxiliarySubtypes) {
         final List<InputMethodInfoCompatWrapper> enabledImis = imm.getEnabledInputMethodList();
 
         // Number of the filtered IMEs