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Merge "13/ Rely on the device state's navigation mode" into ub-launcher3-master

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This commit is contained in:
TreeHugger Robot
2019-10-23 23:45:52 +00:00
committed by Android (Google) Code Review
parent f6448e62e6 a85365c22b
commit e60ae45b9e
6 changed files with 99 additions and 58 deletions
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quickstep/recents_ui_overrides/src/com/android/quickstep/BaseSwipeUpHandler.java
+5 -5
View File
@@ -96,6 +96,7 @@ public abstract class BaseSwipeUpHandler<T extends BaseDraggingActivity, Q exten
protected float mDragLengthFactor = 1;
protected final Context mContext;
protected final RecentsAnimationDeviceState mDeviceState;
protected final GestureState mGestureState;
protected final OverviewComponentObserver mOverviewComponentObserver;
protected final BaseActivityInterface<T> mActivityInterface;
@@ -106,7 +107,6 @@ public abstract class BaseSwipeUpHandler<T extends BaseDraggingActivity, Q exten
protected final TransformParams mTransformParams = new TransformParams();
private final Vibrator mVibrator;
protected final Mode mMode;
// Shift in the range of [0, 1].
// 0 => preview snapShot is completely visible, and hotseat is completely translated down
@@ -135,10 +135,11 @@ public abstract class BaseSwipeUpHandler<T extends BaseDraggingActivity, Q exten
protected boolean mCanceled;
protected int mFinishingRecentsAnimationForNewTaskId = -1;
protected BaseSwipeUpHandler(Context context, GestureState gestureState,
OverviewComponentObserver overviewComponentObserver,
protected BaseSwipeUpHandler(Context context, RecentsAnimationDeviceState deviceState,
GestureState gestureState, OverviewComponentObserver overviewComponentObserver,
RecentsModel recentsModel, InputConsumerController inputConsumer, int runningTaskId) {
mContext = context;
mDeviceState = deviceState;
mGestureState = gestureState;
mOverviewComponentObserver = overviewComponentObserver;
mActivityInterface = gestureState.getActivityInterface();
@@ -147,7 +148,6 @@ public abstract class BaseSwipeUpHandler<T extends BaseDraggingActivity, Q exten
mActivityInterface.createActivityInitListener(this::onActivityInit);
mRunningTaskId = runningTaskId;
mInputConsumer = inputConsumer;
mMode = SysUINavigationMode.getMode(context);
mAppWindowAnimationHelper = new AppWindowAnimationHelper(context);
mPageSpacing = context.getResources().getDimensionPixelSize(R.dimen.recents_page_spacing);
@@ -348,7 +348,7 @@ public abstract class BaseSwipeUpHandler<T extends BaseDraggingActivity, Q exten
mAppWindowAnimationHelper.updateHomeBounds(getStackBounds(dp));
}
mAppWindowAnimationHelper.updateTargetRect(TEMP_RECT);
if (mMode == Mode.NO_BUTTON) {
if (mDeviceState.isFullyGesturalNavMode()) {
// We can drag all the way to the top of the screen.
mDragLengthFactor = (float) dp.heightPx / mTransitionDragLength;
}
quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
+20 -27
View File
@@ -63,8 +63,6 @@ import com.android.launcher3.provider.RestoreDbTask;
import com.android.launcher3.testing.TestProtocol;
import com.android.launcher3.uioverrides.plugins.PluginManagerWrapper;
import com.android.launcher3.util.TraceHelper;
import com.android.quickstep.SysUINavigationMode.Mode;
import com.android.quickstep.SysUINavigationMode.NavigationModeChangeListener;
import com.android.quickstep.inputconsumers.AccessibilityInputConsumer;
import com.android.quickstep.inputconsumers.AssistantInputConsumer;
import com.android.quickstep.inputconsumers.DeviceLockedInputConsumer;
@@ -114,8 +112,7 @@ class ArgList extends LinkedList<String> {
* Service connected by system-UI for handling touch interaction.
*/
@TargetApi(Build.VERSION_CODES.Q)
public class TouchInteractionService extends Service implements
NavigationModeChangeListener, PluginListener<OverscrollPlugin> {
public class TouchInteractionService extends Service implements PluginListener<OverscrollPlugin> {
private static final String TAG = "TouchInteractionService";
@@ -269,20 +266,18 @@ public class TouchInteractionService extends Service implements
private InputMonitorCompat mInputMonitorCompat;
private InputEventReceiver mInputEventReceiver;
private Mode mMode = Mode.THREE_BUTTONS;
@Override
public void onCreate() {
super.onCreate();
mDeviceState = new RecentsAnimationDeviceState(this);
mDeviceState.runOnUserUnlocked(this::onUserUnlocked);
// Initialize anything here that is needed in direct boot mode.
// Everything else should be initialized in onUserUnlocked() below.
mMainChoreographer = Choreographer.getInstance();
mAM = ActivityManagerWrapper.getInstance();
mDeviceState = new RecentsAnimationDeviceState(this);
mDeviceState.addNavigationModeChangedCallback(this::onNavigationModeChanged);
mDeviceState.runOnUserUnlocked(this::onUserUnlocked);
onNavigationModeChanged(SysUINavigationMode.INSTANCE.get(this).addModeChangeListener(this));
sConnected = true;
PluginManagerWrapper.INSTANCE.get(getBaseContext()).addPluginListener(this,
@@ -308,7 +303,7 @@ public class TouchInteractionService extends Service implements
Log.d(TestProtocol.NO_BACKGROUND_TO_OVERVIEW_TAG, "initInputMonitor 1");
}
disposeEventHandlers();
if (!mMode.hasGestures || !SystemUiProxy.INSTANCE.get(this).isActive()) {
if (mDeviceState.isButtonNavMode() || !SystemUiProxy.INSTANCE.get(this).isActive()) {
return;
}
if (TestProtocol.sDebugTracing) {
@@ -327,12 +322,10 @@ public class TouchInteractionService extends Service implements
mDeviceState.updateGestureTouchRegions();
}
@Override
public void onNavigationModeChanged(Mode newMode) {
if (TestProtocol.sDebugTracing) {
Log.d(TestProtocol.NO_BACKGROUND_TO_OVERVIEW_TAG, "onNavigationModeChanged " + newMode);
}
mMode = newMode;
/**
* Called when the navigation mode changes, guaranteed to be after the device state has updated.
*/
private void onNavigationModeChanged(SysUINavigationMode.Mode mode) {
initInputMonitor();
resetHomeBounceSeenOnQuickstepEnabledFirstTime();
}
@@ -369,7 +362,7 @@ public class TouchInteractionService extends Service implements
}
private void resetHomeBounceSeenOnQuickstepEnabledFirstTime() {
if (!mDeviceState.isUserUnlocked() || !mMode.hasGestures) {
if (!mDeviceState.isUserUnlocked() || mDeviceState.isButtonNavMode()) {
// Skip if not yet unlocked (can't read user shared prefs) or if the current navigation
// mode doesn't have gestures
return;
@@ -417,7 +410,6 @@ public class TouchInteractionService extends Service implements
}
disposeEventHandlers();
mDeviceState.destroy();
SysUINavigationMode.INSTANCE.get(this).removeModeChangeListener(this);
SystemUiProxy.INSTANCE.get(this).setProxy(null);
sConnected = false;
@@ -453,7 +445,8 @@ public class TouchInteractionService extends Service implements
ActiveGestureLog.INSTANCE.addLog("setInputConsumer", mConsumer.getType());
mUncheckedConsumer = mConsumer;
} else if (mDeviceState.isUserUnlocked() && mMode == Mode.NO_BUTTON
} else if (mDeviceState.isUserUnlocked()
&& mDeviceState.isFullyGesturalNavMode()
&& mDeviceState.canTriggerAssistantAction(event)) {
// Do not change mConsumer as if there is an ongoing QuickSwitch gesture, we should
// not interrupt it. QuickSwitch assumes that interruption can only happen if the
@@ -494,7 +487,7 @@ public class TouchInteractionService extends Service implements
|| previousGestureState.isRecentsAnimationRunning()
? newBaseConsumer(previousGestureState, newGestureState, event)
: mResetGestureInputConsumer;
if (mMode == Mode.NO_BUTTON) {
if (mDeviceState.isFullyGesturalNavMode()) {
if (mDeviceState.canTriggerAssistantAction(event)) {
base = new AssistantInputConsumer(this, newGestureState, base, mInputMonitorCompat);
}
@@ -584,7 +577,8 @@ public class TouchInteractionService extends Service implements
final boolean shouldDefer;
final BaseSwipeUpHandler.Factory factory;
if (mMode == Mode.NO_BUTTON && !mOverviewComponentObserver.isHomeAndOverviewSame()) {
if (mDeviceState.isFullyGesturalNavMode()
&& !mOverviewComponentObserver.isHomeAndOverviewSame()) {
shouldDefer = previousGestureState.getFinishingRecentsAnimationTaskId() < 0;
factory = mFallbackNoButtonFactory;
} else {
@@ -601,7 +595,7 @@ public class TouchInteractionService extends Service implements
private InputConsumer createDeviceLockedInputConsumer(GestureState gestureState,
RunningTaskInfo taskInfo) {
if (mMode == Mode.NO_BUTTON && taskInfo != null) {
if (mDeviceState.isFullyGesturalNavMode() && taskInfo != null) {
return new DeviceLockedInputConsumer(this, mDeviceState, mTaskAnimationManager,
gestureState, mInputMonitorCompat, taskInfo.taskId);
} else {
@@ -641,7 +635,7 @@ public class TouchInteractionService extends Service implements
if (!mDeviceState.isUserUnlocked()) {
return;
}
if (!mMode.hasGestures && !mOverviewComponentObserver.isHomeAndOverviewSame()) {
if (mDeviceState.isButtonNavMode() && !mOverviewComponentObserver.isHomeAndOverviewSame()) {
// Prevent the overview from being started before the real home on first boot.
return;
}
@@ -708,7 +702,6 @@ public class TouchInteractionService extends Service implements
// Dump everything
mDeviceState.dump(pw);
pw.println("TouchState:");
pw.println(" navMode=" + mMode);
boolean resumed = mOverviewComponentObserver != null
&& mOverviewComponentObserver.getActivityInterface().isResumed();
pw.println(" resumed=" + resumed);
@@ -748,9 +741,9 @@ public class TouchInteractionService extends Service implements
private BaseSwipeUpHandler createFallbackNoButtonSwipeHandler(GestureState gestureState,
RunningTaskInfo runningTask, long touchTimeMs, boolean continuingLastGesture,
boolean isLikelyToStartNewTask) {
return new FallbackNoButtonInputConsumer(this, gestureState, mOverviewComponentObserver,
runningTask, mRecentsModel, mInputConsumer, isLikelyToStartNewTask,
continuingLastGesture);
return new FallbackNoButtonInputConsumer(this, mDeviceState, gestureState,
mOverviewComponentObserver, runningTask, mRecentsModel, mInputConsumer,
isLikelyToStartNewTask, continuingLastGesture);
}
protected boolean shouldNotifyBackGesture() {
quickstep/recents_ui_overrides/src/com/android/quickstep/WindowTransformSwipeHandler.java
+9 -13
View File
@@ -157,9 +157,7 @@ public class WindowTransformSwipeHandler<T extends BaseDraggingActivity>
*/
private static final int LOG_NO_OP_PAGE_INDEX = -1;
private final RecentsAnimationDeviceState mDeviceState;
private final TaskAnimationManager mTaskAnimationManager;
private final GestureState mGestureState;
// Either RectFSpringAnim (if animating home) or ObjectAnimator (from mCurrentShift) otherwise
private RunningWindowAnim mRunningWindowAnim;
@@ -198,11 +196,9 @@ public class WindowTransformSwipeHandler<T extends BaseDraggingActivity>
RunningTaskInfo runningTaskInfo, long touchTimeMs,
OverviewComponentObserver overviewComponentObserver, boolean continuingLastGesture,
InputConsumerController inputConsumer, RecentsModel recentsModel) {
super(context, gestureState, overviewComponentObserver, recentsModel, inputConsumer,
runningTaskInfo.id);
mDeviceState = deviceState;
super(context, deviceState, gestureState, overviewComponentObserver, recentsModel,
inputConsumer, runningTaskInfo.id);
mTaskAnimationManager = taskAnimationManager;
mGestureState = gestureState;
mTouchTimeMs = touchTimeMs;
mContinuingLastGesture = continuingLastGesture;
initStateCallbacks();
@@ -444,7 +440,7 @@ public class WindowTransformSwipeHandler<T extends BaseDraggingActivity>
* Note this method has no effect unless the navigation mode is NO_BUTTON.
*/
private void maybeUpdateRecentsAttachedState(boolean animate) {
if (mMode != Mode.NO_BUTTON || mRecentsView == null) {
if (!mDeviceState.isFullyGesturalNavMode() || mRecentsView == null) {
return;
}
RemoteAnimationTargetCompat runningTaskTarget = mRecentsAnimationTargets == null
@@ -546,7 +542,7 @@ public class WindowTransformSwipeHandler<T extends BaseDraggingActivity>
final boolean passed = mCurrentShift.value >= MIN_PROGRESS_FOR_OVERVIEW;
if (passed != mPassedOverviewThreshold) {
mPassedOverviewThreshold = passed;
if (mMode != Mode.NO_BUTTON) {
if (!mDeviceState.isFullyGesturalNavMode()) {
performHapticFeedback();
}
}
@@ -730,7 +726,7 @@ public class WindowTransformSwipeHandler<T extends BaseDraggingActivity>
if (!isFling) {
if (isCancel) {
endTarget = LAST_TASK;
} else if (mMode == Mode.NO_BUTTON) {
} else if (mDeviceState.isFullyGesturalNavMode()) {
if (mIsShelfPeeking) {
endTarget = RECENTS;
} else if (goingToNewTask) {
@@ -751,9 +747,9 @@ public class WindowTransformSwipeHandler<T extends BaseDraggingActivity>
boolean willGoToNewTaskOnSwipeUp =
goingToNewTask && Math.abs(velocity.x) > Math.abs(endVelocity);
if (mMode == Mode.NO_BUTTON && isSwipeUp && !willGoToNewTaskOnSwipeUp) {
if (mDeviceState.isFullyGesturalNavMode() && isSwipeUp && !willGoToNewTaskOnSwipeUp) {
endTarget = HOME;
} else if (mMode == Mode.NO_BUTTON && isSwipeUp && !mIsShelfPeeking) {
} else if (mDeviceState.isFullyGesturalNavMode() && isSwipeUp && !mIsShelfPeeking) {
// If swiping at a diagonal, base end target on the faster velocity.
endTarget = NEW_TASK;
} else if (isSwipeUp) {
@@ -793,7 +789,7 @@ public class WindowTransformSwipeHandler<T extends BaseDraggingActivity>
float minFlingVelocity = mContext.getResources()
.getDimension(R.dimen.quickstep_fling_min_velocity);
if (Math.abs(endVelocity) > minFlingVelocity && mTransitionDragLength > 0) {
if (endTarget == RECENTS && mMode != Mode.NO_BUTTON) {
if (endTarget == RECENTS && !mDeviceState.isFullyGesturalNavMode()) {
Interpolators.OvershootParams overshoot = new Interpolators.OvershootParams(
startShift, endShift, endShift, endVelocity / 1000,
mTransitionDragLength, mContext);
@@ -839,7 +835,7 @@ public class WindowTransformSwipeHandler<T extends BaseDraggingActivity>
}
duration = Math.max(duration, mRecentsView.getScroller().getDuration());
}
if (mMode == Mode.NO_BUTTON) {
if (mDeviceState.isFullyGesturalNavMode()) {
setShelfState(ShelfAnimState.OVERVIEW, interpolator, duration);
}
} else if (endTarget == NEW_TASK || endTarget == LAST_TASK) {
quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/FallbackNoButtonInputConsumer.java
+5 -4
View File
@@ -50,6 +50,7 @@ import com.android.quickstep.MultiStateCallback;
import com.android.quickstep.OverviewComponentObserver;
import com.android.quickstep.RecentsActivity;
import com.android.quickstep.RecentsAnimationController;
import com.android.quickstep.RecentsAnimationDeviceState;
import com.android.quickstep.RecentsModel;
import com.android.quickstep.fallback.FallbackRecentsView;
import com.android.quickstep.util.RectFSpringAnim;
@@ -112,13 +113,13 @@ public class FallbackNoButtonInputConsumer extends
private final PointF mEndVelocityPxPerMs = new PointF(0, 0.5f);
private RunningWindowAnim mFinishAnimation;
public FallbackNoButtonInputConsumer(Context context, GestureState gestureState,
OverviewComponentObserver overviewComponentObserver,
public FallbackNoButtonInputConsumer(Context context, RecentsAnimationDeviceState deviceState,
GestureState gestureState, OverviewComponentObserver overviewComponentObserver,
RunningTaskInfo runningTaskInfo, RecentsModel recentsModel,
InputConsumerController inputConsumer,
boolean isLikelyToStartNewTask, boolean continuingLastGesture) {
super(context, gestureState, overviewComponentObserver, recentsModel, inputConsumer,
runningTaskInfo.id);
super(context, deviceState, gestureState, overviewComponentObserver, recentsModel,
inputConsumer, runningTaskInfo.id);
mLauncherAlpha.value = 1;
mRunningTaskInfo = runningTaskInfo;
quickstep/recents_ui_overrides/src/com/android/quickstep/inputconsumers/OtherActivityInputConsumer.java
+1 -5
View File
@@ -54,8 +54,6 @@ import com.android.quickstep.GestureState;
import com.android.quickstep.InputConsumer;
import com.android.quickstep.RecentsAnimationCallbacks;
import com.android.quickstep.RecentsAnimationDeviceState;
import com.android.quickstep.SysUINavigationMode;
import com.android.quickstep.SysUINavigationMode.Mode;
import com.android.quickstep.TaskAnimationManager;
import com.android.quickstep.util.ActiveGestureLog;
import com.android.quickstep.util.CachedEventDispatcher;
@@ -85,7 +83,6 @@ public class OtherActivityInputConsumer extends ContextWrapper implements InputC
private final CachedEventDispatcher mRecentsViewDispatcher = new CachedEventDispatcher();
private final RunningTaskInfo mRunningTask;
private final InputMonitorCompat mInputMonitorCompat;
private final SysUINavigationMode.Mode mMode;
private final BaseActivityInterface mActivityInterface;
private final BaseSwipeUpHandler.Factory mHandlerFactory;
@@ -137,7 +134,6 @@ public class OtherActivityInputConsumer extends ContextWrapper implements InputC
mGestureState = gestureState;
mMainThreadHandler = new Handler(Looper.getMainLooper());
mRunningTask = runningTaskInfo;
mMode = SysUINavigationMode.getMode(base);
mHandlerFactory = handlerFactory;
mActivityInterface = mGestureState.getActivityInterface();
@@ -293,7 +289,7 @@ public class OtherActivityInputConsumer extends ContextWrapper implements InputC
mInteractionHandler.updateDisplacement(displacement - mStartDisplacement);
}
if (mMode == Mode.NO_BUTTON) {
if (mDeviceState.isFullyGesturalNavMode()) {
mMotionPauseDetector.setDisallowPause(upDist < mMotionPauseMinDisplacement
|| isLikelyToStartNewTask);
mMotionPauseDetector.addPosition(displacement, ev.getEventTime());
quickstep/src/com/android/quickstep/RecentsAnimationDeviceState.java
+59 -4
View File
@@ -21,6 +21,7 @@ import static com.android.launcher3.ResourceUtils.NAVBAR_BOTTOM_GESTURE_SIZE;
import static com.android.launcher3.ResourceUtils.NAVBAR_LANDSCAPE_LEFT_RIGHT_SIZE;
import static com.android.quickstep.SysUINavigationMode.Mode.NO_BUTTON;
import static com.android.quickstep.SysUINavigationMode.Mode.THREE_BUTTONS;
import static com.android.quickstep.SysUINavigationMode.Mode.TWO_BUTTONS;
import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_A11Y_BUTTON_CLICKABLE;
import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_A11Y_BUTTON_LONG_CLICKABLE;
import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_HOME_DISABLED;
@@ -43,6 +44,7 @@ import android.graphics.RectF;
import android.graphics.Region;
import android.os.Process;
import android.text.TextUtils;
import android.util.Log;
import android.view.MotionEvent;
import android.view.Surface;
@@ -52,7 +54,9 @@ import com.android.launcher3.R;
import com.android.launcher3.ResourceUtils;
import com.android.launcher3.Utilities;
import com.android.launcher3.compat.UserManagerCompat;
import com.android.launcher3.testing.TestProtocol;
import com.android.launcher3.util.DefaultDisplay;
import com.android.quickstep.SysUINavigationMode.NavigationModeChangeListener;
import com.android.systemui.shared.system.ActivityManagerWrapper;
import com.android.systemui.shared.system.QuickStepContract;
import com.android.systemui.shared.system.QuickStepContract.SystemUiStateFlags;
@@ -65,7 +69,7 @@ import java.util.ArrayList;
* Manages the state of the system during a swipe up gesture.
*/
public class RecentsAnimationDeviceState implements
SysUINavigationMode.NavigationModeChangeListener,
NavigationModeChangeListener,
DefaultDisplay.DisplayInfoChangeListener {
private Context mContext;
@@ -74,6 +78,8 @@ public class RecentsAnimationDeviceState implements
private DefaultDisplay mDefaultDisplay;
private int mDisplayId;
private final ArrayList<Runnable> mOnDestroyActions = new ArrayList<>();
private @SystemUiStateFlags int mSystemUiStateFlags;
private SysUINavigationMode.Mode mMode = THREE_BUTTONS;
@@ -114,6 +120,7 @@ public class RecentsAnimationDeviceState implements
mContext.registerReceiver(mUserUnlockedReceiver,
new IntentFilter(ACTION_USER_UNLOCKED));
}
runOnDestroy(() -> Utilities.unregisterReceiverSafely(mContext, mUserUnlockedReceiver));
// Register for exclusion updates
mExclusionListener = new SystemGestureExclusionListenerCompat(mDisplayId) {
@@ -124,7 +131,11 @@ public class RecentsAnimationDeviceState implements
mExclusionRegion = region;
}
};
runOnDestroy(mExclusionListener::unregister);
// Register for navigation mode changes
onNavigationModeChanged(mSysUiNavMode.addModeChangeListener(this));
runOnDestroy(() -> mSysUiNavMode.removeModeChangeListener(this));
// Add any blocked activities
String blockingActivity = context.getString(R.string.gesture_blocking_activity);
@@ -133,18 +144,34 @@ public class RecentsAnimationDeviceState implements
}
}
private void runOnDestroy(Runnable action) {
mOnDestroyActions.add(action);
}
/**
* Cleans up all the registered listeners and receivers.
*/
public void destroy() {
Utilities.unregisterReceiverSafely(mContext, mUserUnlockedReceiver);
mSysUiNavMode.removeModeChangeListener(this);
for (Runnable r : mOnDestroyActions) {
r.run();
}
mDefaultDisplay.removeChangeListener(this);
mExclusionListener.unregister();
}
/**
* Adds a listener for the nav mode change, guaranteed to be called after the device state's
* mode has changed.
*/
public void addNavigationModeChangedCallback(NavigationModeChangeListener listener) {
listener.onNavigationModeChanged(mSysUiNavMode.addModeChangeListener(listener));
runOnDestroy(() -> mSysUiNavMode.removeModeChangeListener(listener));
}
@Override
public void onNavigationModeChanged(SysUINavigationMode.Mode newMode) {
if (TestProtocol.sDebugTracing) {
Log.d(TestProtocol.NO_BACKGROUND_TO_OVERVIEW_TAG, "onNavigationModeChanged " + newMode);
}
mDefaultDisplay.removeChangeListener(this);
if (newMode.hasGestures) {
mDefaultDisplay.addChangeListener(this);
@@ -167,6 +194,34 @@ public class RecentsAnimationDeviceState implements
updateGestureTouchRegions();
}
/**
* @return the current navigation mode for the device.
*/
public SysUINavigationMode.Mode getNavMode() {
return mMode;
}
/**
* @return whether the current nav mode is fully gestural.
*/
public boolean isFullyGesturalNavMode() {
return mMode == NO_BUTTON;
}
/**
* @return whether the current nav mode has some gestures (either 2 or 0 button mode).
*/
public boolean isGesturalNavMode() {
return mMode == TWO_BUTTONS || mMode == NO_BUTTON;
}
/**
* @return whether the current nav mode is button-based.
*/
public boolean isButtonNavMode() {
return mMode == THREE_BUTTONS;
}
/**
* @return the display id for the display that Launcher is running on.
*/