Add flags to stash taskbar for app pinning and empty hotseat

Test: pin an app from overview, watch taskbar stash automatically until unpinning
Test: turn off suggestions for hotseat, remove all items and watch taskbar stash automatically when opening an app
Fixes: 190192993
Fixes: 193937948
Change-Id: Ia7260c60a820af1a48c9e4a400a52753baf34d41

quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java

@@ -321,6 +321,7 @@ public class TaskbarActivityContext extends ContextThemeWrapper implements Activ
         mControllers.taskbarViewController.setRecentsButtonDisabled(
                 mControllers.navbarButtonsViewController.isRecentsDisabled());
         mControllers.taskbarKeyguardController.updateStateForSysuiFlags(systemUiStateFlags);
+        mControllers.taskbarStashController.updateStateForSysuiFlags(systemUiStateFlags);
     }
 
     public void onRotationProposal(int rotation, boolean isValid) {

quickstep/src/com/android/launcher3/taskbar/TaskbarModelCallbacks.java

@@ -45,6 +45,9 @@ public class TaskbarModelCallbacks implements
     private final TaskbarActivityContext mContext;
     private final TaskbarView mContainer;
 
+    // Initialized in init.
+    private TaskbarControllers mControllers;
+
     private boolean mBindInProgress = false;
 
     public TaskbarModelCallbacks(
@@ -53,6 +56,10 @@ public class TaskbarModelCallbacks implements
         mContainer = container;
     }
 
+    public void init(TaskbarControllers controllers) {
+        mControllers = controllers;
+    }
+
     @Override
     public void startBinding() {
         mBindInProgress = true;
@@ -161,6 +168,7 @@ public class TaskbarModelCallbacks implements
         int predictionSize = mPredictedItems.size();
         int predictionNextIndex = 0;
 
+        boolean isHotseatEmpty = true;
         for (int i = 0; i < hotseatItemInfos.length; i++) {
             hotseatItemInfos[i] = mHotseatItems.get(i);
             if (hotseatItemInfos[i] == null && predictionNextIndex < predictionSize) {
@@ -168,7 +176,14 @@ public class TaskbarModelCallbacks implements
                 hotseatItemInfos[i].screenId = i;
                 predictionNextIndex++;
             }
+            if (hotseatItemInfos[i] != null) {
+                isHotseatEmpty = false;
+            }
         }
         mContainer.updateHotseatItems(hotseatItemInfos);
+
+        mControllers.taskbarStashController.updateStateForFlag(
+                TaskbarStashController.FLAG_STASHED_IN_APP_EMPTY, isHotseatEmpty);
+        mControllers.taskbarStashController.applyState();
     }
 }

quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java

@@ -19,6 +19,7 @@ import static android.view.HapticFeedbackConstants.LONG_PRESS;
 
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_TASKBAR_LONGPRESS_HIDE;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_TASKBAR_LONGPRESS_SHOW;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_SCREEN_PINNING;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
@@ -44,10 +45,13 @@ public class TaskbarStashController {
 
     public static final int FLAG_IN_APP = 1 << 0;
     public static final int FLAG_STASHED_IN_APP_MANUAL = 1 << 1; // long press, persisted
-    public static final int FLAG_IN_STASHED_LAUNCHER_STATE = 1 << 2;
+    public static final int FLAG_STASHED_IN_APP_PINNED = 1 << 2; // app pinning
+    public static final int FLAG_STASHED_IN_APP_EMPTY = 1 << 3; // no hotseat icons
+    public static final int FLAG_IN_STASHED_LAUNCHER_STATE = 1 << 4;
 
     // If we're in an app and any of these flags are enabled, taskbar should be stashed.
-    public static final int FLAGS_STASHED_IN_APP = FLAG_STASHED_IN_APP_MANUAL;
+    public static final int FLAGS_STASHED_IN_APP = FLAG_STASHED_IN_APP_MANUAL
+            | FLAG_STASHED_IN_APP_PINNED | FLAG_STASHED_IN_APP_EMPTY;
 
     /**
      * How long to stash/unstash when manually invoked via long press.
@@ -368,6 +372,13 @@ public class TaskbarStashController {
         return mStatePropertyHolder.setState(mState, duration, false);
     }
 
+    /** Called when some system ui state has changed. (See SYSUI_STATE_... in QuickstepContract) */
+    public void updateStateForSysuiFlags(int systemUiStateFlags) {
+        updateStateForFlag(FLAG_STASHED_IN_APP_PINNED,
+                hasAnyFlag(systemUiStateFlags, SYSUI_STATE_SCREEN_PINNING));
+        applyState();
+    }
+
     /**
      * Updates the proper flag to indicate whether the task bar should be stashed.
      *

quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java

@@ -85,6 +85,8 @@ public class TaskbarViewController {
         mTaskbarView.getLayoutParams().height = mActivity.getDeviceProfile().taskbarSize;
 
         mTaskbarIconScaleForStash.updateValue(1f);
+
+        mModelCallbacks.init(controllers);
         LauncherAppState.getInstance(mActivity).getModel().addCallbacksAndLoad(mModelCallbacks);
     }