Add support for Bluetooth keyboards. Fixes #775 (#1878)

Author: bluemarvin

app/src/common/shared/org/mozilla/vrbrowser/VRBrowserActivity.java

@@ -608,12 +608,15 @@ public void onBackPressed() {
 
     @Override
     public boolean dispatchKeyEvent(KeyEvent event) {
+        if (mKeyboard.dispatchKeyEvent(event)) {
+            return true;
+        }
+        final int keyCode = event.getKeyCode();
         if (DeviceType.isOculusBuild()) {
             int action = event.getAction();
             if (action != KeyEvent.ACTION_DOWN) {
                 return super.dispatchKeyEvent(event);
             }
-            int keyCode = event.getKeyCode();
             boolean result;
             switch (keyCode) {
                 case KeyEvent.KEYCODE_VOLUME_UP:
@@ -622,14 +625,17 @@ public boolean dispatchKeyEvent(KeyEvent event) {
                 case KeyEvent.KEYCODE_VOLUME_DOWN:
                     result = callOnAudioManager((AudioManager aManager) -> aManager.adjustStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_LOWER, AudioManager.FLAG_SHOW_UI));
                     break;
+                case KeyEvent.KEYCODE_VOLUME_MUTE:
+                    result = callOnAudioManager((AudioManager aManager) -> aManager.adjustStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_MUTE, AudioManager.FLAG_SHOW_UI));
+                    break;
                 default:
                     return super.dispatchKeyEvent(event);
             }
             return result || super.dispatchKeyEvent(event);
 
         } else if (DeviceType.isGoogleVR()) {
             boolean result;
-            switch( event.getKeyCode() ) {
+            switch (keyCode) {
                 case KeyEvent.KEYCODE_VOLUME_UP:
                 case KeyEvent.KEYCODE_VOLUME_DOWN:
                     result = true;

app/src/common/shared/org/mozilla/vrbrowser/ui/widgets/KeyboardWidget.java

@@ -15,13 +15,16 @@
 import android.text.TextWatcher;
 import android.util.AttributeSet;
 import android.util.Log;
+import android.view.KeyCharacterMap;
+import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.ExtractedText;
 import android.view.inputmethod.ExtractedTextRequest;
 import android.view.inputmethod.InputConnection;
+import android.widget.EditText;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
@@ -309,6 +312,10 @@ private void resetKeyboardLayout() {
         updateCandidates();
     }
 
+    private boolean isAttachToWindowWidget() {
+        return mFocusedView instanceof WindowWidget;
+    }
+
     public void updateFocusedView(View aFocusedView) {
         if (mFocusedView != null && mFocusedView instanceof TextView) {
             ((TextView)mFocusedView).removeTextChangedListener(this);
@@ -910,6 +917,59 @@ private void displayComposingText(String aText, ComposingAction aAction) {
         }
     }
 
+    private void moveCursor(final int direction) {
+        EditText textView;
+        if (mFocusedView != null && mFocusedView instanceof EditText) {
+            textView = (EditText)mFocusedView;
+            final int cursor = textView.getSelectionStart() + direction;
+            if ((cursor <= textView.length()) && (cursor >= 0)) {
+                textView.setSelection(cursor);
+            }
+        }
+    }
+
+    @Override
+    public boolean dispatchKeyEvent(final KeyEvent event) {
+        final int keyCode = event.getKeyCode();
+        final InputConnection connection = mInputConnection;
+        if (connection != null) {
+            if (isAttachToWindowWidget()) {
+                connection.sendKeyEvent(event);
+                hide(UIWidget.KEEP_WIDGET);
+                return true;
+            }
+            // Android Components do not support InputConnection.sendKeyEvent()
+            if (event.getAction() == KeyEvent.ACTION_DOWN) {
+                Log.e("reb", "key = " + KeyEvent.keyCodeToString(keyCode));
+
+                switch (keyCode) {
+                    case KeyEvent.KEYCODE_DEL:
+                        handleBackspace(event.isLongPress());
+                        return true;
+                    case KeyEvent.KEYCODE_ENTER:
+                    case KeyEvent.KEYCODE_NUMPAD_ENTER:
+                        handleDone();
+                        return true;
+                    case KeyEvent.KEYCODE_DPAD_LEFT:
+                        moveCursor(-1);
+                        return true;
+                    case KeyEvent.KEYCODE_DPAD_RIGHT:
+                        moveCursor(1);
+                        return true;
+                    default:
+                        break;
+                }
+                if (event.getUnicodeChar() != 0) {
+                    KeyCharacterMap map = event.getKeyCharacterMap();
+                    String value = String.valueOf((char) map.get(keyCode, event.getMetaState()));
+                    connection.commitText(value, 1);
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
     // GeckoSession.TextInputDelegate
 
     @Override