1 files changed, 74 insertions, 0 deletions
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/BackgroundAppState.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/BackgroundAppState.java
new file mode 100644
index 000000000..8d28f3333
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/BackgroundAppState.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.uioverrides;
+
+import android.os.RemoteException;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.allapps.AllAppsTransitionController;
+import com.android.quickstep.QuickScrubController;
+import com.android.quickstep.RecentsModel;
+import com.android.quickstep.util.LayoutUtils;
+import com.android.quickstep.views.RecentsView;
+import com.android.systemui.shared.recents.ISystemUiProxy;
+
+/**
+ * State indicating that the Launcher is behind an app
+ */
+public class BackgroundAppState extends OverviewState {
+
+    private static final int STATE_FLAGS =
+            FLAG_DISABLE_RESTORE | FLAG_OVERVIEW_UI | FLAG_DISABLE_ACCESSIBILITY;
+
+    public BackgroundAppState(int id) {
+        super(id, QuickScrubController.QUICK_SCRUB_FROM_HOME_START_DURATION, STATE_FLAGS);
+    }
+
+    @Override
+    public float getVerticalProgress(Launcher launcher) {
+        if (launcher.getDeviceProfile().isVerticalBarLayout()) {
+            return super.getVerticalProgress(launcher);
+        }
+        int transitionLength = LayoutUtils.getShelfTrackingDistance(launcher,
+                launcher.getDeviceProfile());
+        AllAppsTransitionController controller = launcher.getAllAppsController();
+        float scrollRange = Math.max(controller.getShiftRange(), 1);
+        float progressDelta = (transitionLength / scrollRange);
+        return super.getVerticalProgress(launcher) + progressDelta;
+    }
+
+    @Override
+    public float[] getOverviewScaleAndTranslationYFactor(Launcher launcher) {
+        // Initialize the recents view scale to what it would be when starting swipe up/quickscrub
+        RecentsView recentsView = launcher.getOverviewPanel();
+        recentsView.getTaskSize(sTempRect);
+        int appWidth = launcher.getDragLayer().getWidth();
+        if (recentsView.shouldUseMultiWindowTaskSizeStrategy()) {
+            ISystemUiProxy sysUiProxy = RecentsModel.INSTANCE.get(launcher).getSystemUiProxy();
+            if (sysUiProxy != null) {
+                try {
+                    // Try to use the actual non-minimized app width (launcher will be resized to
+                    // the non-minimized bounds, which differs from the app width in landscape
+                    // multi-window mode
+                    appWidth = sysUiProxy.getNonMinimizedSplitScreenSecondaryBounds().width();
+                } catch (RemoteException e) {
+                    // Ignore, fall back to just using the drag layer width
+                }
+            }
+        }
+        float scale = (float) appWidth / sTempRect.width();
+        return new float[] { scale, 0f };
+    }
+}