Add "force non-distinct multitouch" debug option

Change-Id: I9fd6fabf03515011cedb8aaa30fdb7a77f2d4d12

java/res/values/donottranslate.xml

@@ -120,6 +120,7 @@
     <!-- Title for Latin keyboard debug settings activity / dialog -->
     <string name="english_ime_debug_settings">Android keyboard Debug settings</string>
     <string name="prefs_debug_mode">Debug Mode</string>
+    <string name="prefs_force_non_distinct_multitouch">Force non-distinct multitouch</string>
 
     <!-- Keyboard theme names -->
     <string name="layout_basic">Basic</string>

java/res/xml/prefs_for_debug.xml

@@ -42,4 +42,10 @@
             android:defaultValue="false"
             />
 
+    <CheckBoxPreference
+            android:key="force_non_distinct_multitouch"
+            android:title="@string/prefs_force_non_distinct_multitouch"
+            android:persistent="true"
+            android:defaultValue="false"
+            />
 </PreferenceScreen>

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

@@ -28,6 +28,7 @@ import android.view.inputmethod.EditorInfo;
 
 import com.android.inputmethod.accessibility.AccessibleKeyboardViewProxy;
 import com.android.inputmethod.keyboard.internal.KeyboardState;
+import com.android.inputmethod.latin.DebugSettings;
 import com.android.inputmethod.latin.InputView;
 import com.android.inputmethod.latin.LatinIME;
 import com.android.inputmethod.latin.LatinImeLogger;
@@ -53,6 +54,7 @@ public class KeyboardSwitcher implements KeyboardState.SwitchActions,
 
     private SubtypeSwitcher mSubtypeSwitcher;
     private SharedPreferences mPrefs;
+    private boolean mForceNonDistinctMultitouch;
 
     private InputView mCurrentInputView;
     private LatinKeyboardView mKeyboardView;
@@ -92,6 +94,8 @@ public class KeyboardSwitcher implements KeyboardState.SwitchActions,
         mState = new KeyboardState(this);
         setContextThemeWrapper(ims, getKeyboardThemeIndex(ims, prefs));
         prefs.registerOnSharedPreferenceChangeListener(this);
+        mForceNonDistinctMultitouch = prefs.getBoolean(
+                DebugSettings.FORCE_NON_DISTINCT_MULTITOUCH_KEY, false);
     }
 
     private static int getKeyboardThemeIndex(Context context, SharedPreferences prefs) {
@@ -391,6 +395,9 @@ public class KeyboardSwitcher implements KeyboardState.SwitchActions,
 
         mKeyboardView = (LatinKeyboardView) mCurrentInputView.findViewById(R.id.keyboard_view);
         mKeyboardView.setKeyboardActionListener(mInputMethodService);
+        if (mForceNonDistinctMultitouch) {
+            mKeyboardView.setDistinctMultitouch(false);
+        }
 
         // This always needs to be set since the accessibility state can
         // potentially change without the input view being re-created.

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

@@ -115,7 +115,7 @@ public class LatinKeyboardView extends KeyboardView implements PointerTracker.Ke
     /** Listener for {@link KeyboardActionListener}. */
     private KeyboardActionListener mKeyboardActionListener;
 
-    private final boolean mHasDistinctMultitouch;
+    private boolean mHasDistinctMultitouch;
     private int mOldPointerCount = 1;
     private Key mOldKey;
 
@@ -371,6 +371,10 @@ public class LatinKeyboardView extends KeyboardView implements PointerTracker.Ke
         return mHasDistinctMultitouch;
     }
 
+    public void setDistinctMultitouch(boolean hasDistinctMultitouch) {
+        mHasDistinctMultitouch = hasDistinctMultitouch;
+    }
+
     /**
      * When enabled, calls to {@link KeyboardActionListener#onCodeInput} will include key
      * codes for adjacent keys.  When disabled, only the primary key code will be

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

@@ -30,6 +30,7 @@ public class DebugSettings extends PreferenceActivity
 
     private static final String TAG = "DebugSettings";
     private static final String DEBUG_MODE_KEY = "debug_mode";
+    public static final String FORCE_NON_DISTINCT_MULTITOUCH_KEY = "force_non_distinct_multitouch";
 
     private boolean mServiceNeedsRestart = false;
     private CheckBoxPreference mDebugMode;
@@ -60,6 +61,8 @@ public class DebugSettings extends PreferenceActivity
                 updateDebugMode();
                 mServiceNeedsRestart = true;
             }
+        } else if (key.equals(FORCE_NON_DISTINCT_MULTITOUCH_KEY)) {
+            mServiceNeedsRestart = true;
         }
     }