Blank out recents for locked work tasks

Bug: 31001762
Test: WIP TaskViewThumbnailTest.java
Change-Id: I259fa95f642b83728904653c75efc7e417b0ab60

packages/SystemUI/src/com/android/systemui/recents/misc/SystemServicesProxy.java

@@ -74,6 +74,7 @@ import android.view.WindowManager;
 import android.view.WindowManager.KeyboardShortcutsReceiver;
 import android.view.WindowManagerGlobal;
 import android.view.accessibility.AccessibilityManager;
+import android.app.KeyguardManager;
 
 import com.android.internal.app.AssistUtils;
 import com.android.internal.os.BackgroundThread;
@@ -124,6 +125,7 @@ public class SystemServicesProxy {
     AssistUtils mAssistUtils;
     WindowManager mWm;
     IWindowManager mIwm;
+    KeyguardManager mKgm;
     UserManager mUm;
     Display mDisplay;
     String mRecentsPackage;
@@ -212,6 +214,7 @@ public class SystemServicesProxy {
         mAssistUtils = new AssistUtils(context);
         mWm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
         mIwm = WindowManagerGlobal.getWindowManagerService();
+        mKgm = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
         mUm = UserManager.get(context);
         mDisplay = mWm.getDefaultDisplay();
         mRecentsPackage = context.getPackageName();
@@ -862,6 +865,16 @@ public class SystemServicesProxy {
         return label;
     }
 
+    /**
+     * Returns whether the provided {@param userId} is currently locked (and showing Keyguard).
+     */
+    public boolean isDeviceLocked(int userId) {
+        if (mKgm == null) {
+            return false;
+        }
+        return mKgm.isDeviceLocked(userId);
+    }
+
     /** Returns the package name of the home activity. */
     public String getHomeActivityPackageName() {
         if (mPm == null) return null;

packages/SystemUI/src/com/android/systemui/recents/model/RecentsTaskLoadPlan.java

@@ -28,6 +28,7 @@ import android.os.UserHandle;
 import android.os.UserManager;
 import android.util.ArraySet;
 import android.util.SparseArray;
+import android.util.SparseBooleanArray;
 import android.util.SparseIntArray;
 
 import com.android.systemui.Prefs;
@@ -130,6 +131,7 @@ public class RecentsTaskLoadPlan {
 
         SparseArray<Task.TaskKey> affiliatedTasks = new SparseArray<>();
         SparseIntArray affiliatedTaskCounts = new SparseIntArray();
+        SparseBooleanArray lockedUsers = new SparseBooleanArray();
         String dismissDescFormat = mContext.getString(
                 R.string.accessibility_recents_item_will_be_dismissed);
         String appInfoDescFormat = mContext.getString(
@@ -177,12 +179,17 @@ public class RecentsTaskLoadPlan {
             int backgroundColor = loader.getActivityBackgroundColor(t.taskDescription);
             boolean isSystemApp = (info != null) &&
                     ((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
+            if (lockedUsers.indexOfKey(t.userId) < 0) {
+                lockedUsers.put(t.userId, Recents.getSystemServices().isDeviceLocked(t.userId));
+            }
+            boolean isLocked = lockedUsers.get(t.userId);
 
             // Add the task to the stack
             Task task = new Task(taskKey, t.affiliatedTaskId, t.affiliatedTaskColor, icon,
                     thumbnail, title, titleDescription, dismissDescription, appInfoDescription,
                     activityColor, backgroundColor, isLaunchTarget, isStackTask, isSystemApp,
-                    t.isDockable, t.bounds, t.taskDescription, t.resizeMode, t.topActivity);
+                    t.isDockable, t.bounds, t.taskDescription, t.resizeMode, t.topActivity,
+                    isLocked);
 
             allTasks.add(task);
             affiliatedTaskCounts.put(taskKey.id, affiliatedTaskCounts.get(taskKey.id, 0) + 1);

packages/SystemUI/src/com/android/systemui/recents/model/Task.java

@@ -189,6 +189,9 @@ public class Task {
     @ViewDebug.ExportedProperty(category="recents")
     public ComponentName topActivity;
 
+    @ViewDebug.ExportedProperty(category="recents")
+    public boolean isLocked;
+
     private ArrayList<TaskCallbacks> mCallbacks = new ArrayList<>();
 
     public Task() {
@@ -200,7 +203,7 @@ public class Task {
                 String appInfoDescription, int colorPrimary, int colorBackground,
                 boolean isLaunchTarget, boolean isStackTask, boolean isSystemApp,
                 boolean isDockable, Rect bounds, ActivityManager.TaskDescription taskDescription,
-                int resizeMode, ComponentName topActivity) {
+                int resizeMode, ComponentName topActivity, boolean isLocked) {
         boolean isInAffiliationGroup = (affiliationTaskId != key.id);
         boolean hasAffiliationGroupColor = isInAffiliationGroup && (affiliationColor != 0);
         this.key = key;
@@ -224,6 +227,7 @@ public class Task {
         this.isDockable = isDockable;
         this.resizeMode = resizeMode;
         this.topActivity = topActivity;
+        this.isLocked = isLocked;
     }
 
     /**
@@ -250,6 +254,7 @@ public class Task {
         this.isSystemApp = o.isSystemApp;
         this.isDockable = o.isDockable;
         this.resizeMode = o.resizeMode;
+        this.isLocked = o.isLocked;
         this.topActivity = o.topActivity;
     }
 
@@ -355,6 +360,9 @@ public class Task {
         if (isFreeformTask()) {
             writer.print(" freeform=Y");
         }
+        if (isLocked) {
+            writer.print(" locked=Y");
+        }
         writer.print(" "); writer.print(title);
         writer.println();
     }

packages/SystemUI/src/com/android/systemui/recents/views/TaskViewThumbnail.java

@@ -67,6 +67,7 @@ public class TaskViewThumbnail extends View {
     private float mDimAlpha;
     private Matrix mScaleMatrix = new Matrix();
     private Paint mDrawPaint = new Paint();
+    private Paint mLockedPaint = new Paint();
     private Paint mBgFillPaint = new Paint();
     private BitmapShader mBitmapShader;
     private LightingColorFilter mLightingColorFilter = new LightingColorFilter(0xffffffff, 0);
@@ -102,6 +103,7 @@ public class TaskViewThumbnail extends View {
         mCornerRadius = getResources().getDimensionPixelSize(
                 R.dimen.recents_task_view_rounded_corners_radius);
         mBgFillPaint.setColor(Color.WHITE);
+        mLockedPaint.setColor(Color.WHITE);
         mFullscreenThumbnailScale = context.getResources().getFraction(
                 com.android.internal.R.fraction.thumbnail_fullscreen_scale, 1, 1);
     }
@@ -133,7 +135,11 @@ public class TaskViewThumbnail extends View {
                 (int) (mThumbnailRect.width() * mThumbnailScale));
         int thumbnailHeight = Math.min(viewHeight,
                 (int) (mThumbnailRect.height() * mThumbnailScale));
-        if (mBitmapShader != null && thumbnailWidth > 0 && thumbnailHeight > 0) {
+
+        if (mTask.isLocked) {
+            canvas.drawRoundRect(0, 0, viewWidth, viewHeight, mCornerRadius, mCornerRadius,
+                    mLockedPaint);
+        } else if (mBitmapShader != null && thumbnailWidth > 0 && thumbnailHeight > 0) {
             int topOffset = mTaskBar != null
                     ? mTaskBar.getHeight() - mCornerRadius
                     : 0;
@@ -200,11 +206,13 @@ public class TaskViewThumbnail extends View {
                 ColorMatrixColorFilter filter = new ColorMatrixColorFilter(TMP_FILTER_COLOR_MATRIX);
                 mDrawPaint.setColorFilter(filter);
                 mBgFillPaint.setColorFilter(filter);
+                mLockedPaint.setColorFilter(filter);
             } else {
                 mLightingColorFilter.setColorMultiply(Color.argb(255, mul, mul, mul));
                 mDrawPaint.setColorFilter(mLightingColorFilter);
                 mDrawPaint.setColor(0xFFffffff);
                 mBgFillPaint.setColorFilter(mLightingColorFilter);
+                mLockedPaint.setColorFilter(mLightingColorFilter);
             }
         } else {
             int grey = mul;
@@ -299,6 +307,7 @@ public class TaskViewThumbnail extends View {
         if (t.colorBackground != 0) {
             mBgFillPaint.setColor(t.colorBackground);
         }
+        mLockedPaint.setColor(t.colorPrimary);
     }
 
     /**