Perform editor action IME_ACTION_NEXT/PREVIOUS by tab key

Bug: 3122995
Change-Id: I44280fe1c6cc27f429b311edec71e1027178222d

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

@@ -462,18 +462,26 @@ public class KeyboardSwitcher implements SharedPreferences.OnSharedPreferenceCha
     }
 
     public void updateShiftState() {
+        final ShiftKeyState shiftKeyState = mShiftKeyState;
         if (DEBUG_STATE)
             Log.d(TAG, "updateShiftState:"
                     + " autoCaps=" + mInputMethodService.getCurrentAutoCapsState()
                     + " keyboard=" + getLatinKeyboard().getKeyboardShiftState()
-                    + " shiftKeyState=" + mShiftKeyState);
-        if (isAlphabetMode() && !isShiftLocked() && !mShiftKeyState.isIgnoring()) {
-            if (mInputMethodService.getCurrentAutoCapsState()) {
+                    + " shiftKeyState=" + shiftKeyState);
+        if (isAlphabetMode()) {
+            if (!isShiftLocked() && !shiftKeyState.isIgnoring()) {
+                if (shiftKeyState.isReleasing() && mInputMethodService.getCurrentAutoCapsState()) {
+                    // Only when shift key is releasing, automatic temporary upper case will be set.
                     setAutomaticTemporaryUpperCase();
                 } else {
-                setManualTemporaryUpperCase(mShiftKeyState.isMomentary());
+                    setManualTemporaryUpperCase(shiftKeyState.isMomentary());
                 }
             }
+        } else {
+            // In symbol keyboard mode, we should clear shift key state because only alphabet
+            // keyboard has shift key.
+            shiftKeyState.onRelease();
+        }
     }
 
     public void changeKeyboardMode() {
@@ -565,6 +573,11 @@ public class KeyboardSwitcher implements SharedPreferences.OnSharedPreferenceCha
     }
 
     public void onOtherKeyPressed() {
+        if (DEBUG_STATE)
+            Log.d(TAG, "onOtherKeyPressed:"
+                    + " keyboard=" + getLatinKeyboard().getKeyboardShiftState()
+                    + " shiftKeyState=" + mShiftKeyState
+                    + " symbolKeyState=" + mSymbolKeyState);
         mShiftKeyState.onOtherKeyPressed();
         mSymbolKeyState.onOtherKeyPressed();
     }

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

@@ -572,7 +572,8 @@ public class LatinIME extends InputMethodService
 
     @Override
     public void onStartInputView(EditorInfo attribute, boolean restarting) {
-        LatinKeyboardView inputView = mKeyboardSwitcher.getInputView();
+        final KeyboardSwitcher switcher = mKeyboardSwitcher;
+        LatinKeyboardView inputView = switcher.getInputView();
         // In landscape mode, this method gets called without the input view being created.
         if (inputView == null) {
             return;
@@ -678,9 +679,9 @@ public class LatinIME extends InputMethodService
         mJustAddedAutoSpace = false;
 
         loadSettings(attribute);
-        mKeyboardSwitcher.loadKeyboard(mode, attribute.imeOptions, mVoiceButtonEnabled,
+        switcher.loadKeyboard(mode, attribute.imeOptions, mVoiceButtonEnabled,
                 mVoiceButtonOnPrimary);
-        mKeyboardSwitcher.updateShiftState();
+        switcher.updateShiftState();
 
         setCandidatesViewShownInternal(isCandidateStripVisible(),
                 false /* needsInputViewShown */ );
@@ -1228,7 +1229,7 @@ public class LatinIME extends InputMethodService
             }
             break;
         case KEYCODE_TAB:
-            sendDownUpKeyEvents(KeyEvent.KEYCODE_TAB);
+            handleTab();
             break;
         default:
             if (primaryCode != KEYCODE_ENTER) {
@@ -1343,6 +1344,30 @@ public class LatinIME extends InputMethodService
         ic.endBatchEdit();
     }
 
+    private void handleTab() {
+        final int imeOptions = getCurrentInputEditorInfo().imeOptions;
+        final int navigationFlags =
+                EditorInfo.IME_FLAG_NAVIGATE_NEXT | EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
+        if ((imeOptions & navigationFlags) == 0) {
+            sendDownUpKeyEvents(KeyEvent.KEYCODE_TAB);
+            return;
+        }
+
+        final InputConnection ic = getCurrentInputConnection();
+        if (ic == null)
+            return;
+
+        // True if keyboard is in either chording shift or manual temporary upper case mode.
+        final boolean isManualTemporaryUpperCase = mKeyboardSwitcher.isManualTemporaryUpperCase();
+        if ((imeOptions & EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0
+                && !isManualTemporaryUpperCase) {
+            ic.performEditorAction(EditorInfo.IME_ACTION_NEXT);
+        } else if ((imeOptions & EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS) != 0
+                && isManualTemporaryUpperCase) {
+            ic.performEditorAction(EditorInfo.IME_ACTION_PREVIOUS);
+        }
+    }
+
     private void abortCorrection(boolean force) {
         if (force || TextEntryState.isCorrecting()) {
             TextEntryState.onAbortCorrection();

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

@@ -30,7 +30,7 @@ public class LatinKeyboardShiftState {
                             }
         }
         if (DEBUG)
-            Log.d(TAG, "setShifted: " + toString(oldState) + " > " + this);
+            Log.d(TAG, "setShifted(" + newShiftState + "): " + toString(oldState) + " > " + this);
         return mState != oldState;
     }
 
@@ -44,7 +44,8 @@ public class LatinKeyboardShiftState {
                 mState = NORMAL;
         }
         if (DEBUG)
-            Log.d(TAG, "setShiftLocked: " + toString(oldState) + " > " + this);
+            Log.d(TAG, "setShiftLocked(" + newShiftLockState + "): " + toString(oldState)
+                    + " > " + this);
     }
 
     public void setAutomaticTemporaryUpperCase() {

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

@@ -55,6 +55,10 @@ public class ModifierKeyState {
             Log.d(TAG, mName + ".onOtherKeyPressed: " + toString(oldState) + " > " + this);
     }
 
+    public boolean isReleasing() {
+        return mState == RELEASING;
+    }
+
     public boolean isMomentary() {
         return mState == MOMENTARY;
     }