From e39690b2183e7d60f268b9af4eaeb36c1c1e2fb4 Mon Sep 17 00:00:00 2001
From: Sunny Goyal <sunnygoyal@google.com>
Date: Thu, 2 Aug 2018 13:35:07 -0700
Subject: Launching last task when back button is pressed in overview

Bug: 111158326
Change-Id: Ib38f12f177780d15dbee69e4a27c21aaa9a3e087
---
 .../src/com/android/launcher3/uioverrides/OverviewState.java | 11 +++++++++++
 quickstep/src/com/android/quickstep/views/RecentsView.java   | 12 ++++++++----
 2 files changed, 19 insertions(+), 4 deletions(-)

(limited to 'quickstep')

diff --git a/quickstep/src/com/android/launcher3/uioverrides/OverviewState.java b/quickstep/src/com/android/launcher3/uioverrides/OverviewState.java
index 7f956f8a2..cf3eee6b2 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/OverviewState.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/OverviewState.java
@@ -31,6 +31,7 @@ import com.android.launcher3.allapps.DiscoveryBounce;
 import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
 import com.android.quickstep.RecentsModel;
 import com.android.quickstep.views.RecentsView;
+import com.android.quickstep.views.TaskView;
 
 /**
  * Definition for overview state
@@ -130,4 +131,14 @@ public class OverviewState extends LauncherState {
         DeviceProfile dp = launcher.getDeviceProfile();
         return dp.allAppsCellHeightPx - dp.allAppsIconTextSizePx;
     }
+
+    @Override
+    public void onBackPressed(Launcher launcher) {
+        TaskView taskView = launcher.<RecentsView>getOverviewPanel().getRunningTaskView();
+        if (taskView != null) {
+            taskView.launchTask(true);
+        } else {
+            super.onBackPressed(launcher);
+        }
+    }
 }
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 2680a2695..181d3c59e 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -714,12 +714,16 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
         setCurrentTask(runningTaskId);
     }
 
+    public TaskView getRunningTaskView() {
+        return getTaskView(mRunningTaskId);
+    }
+
     /**
      * Hides the tile associated with {@link #mRunningTaskId}
      */
     public void setRunningTaskHidden(boolean isHidden) {
         mRunningTaskTileHidden = isHidden;
-        TaskView runningTask = getTaskView(mRunningTaskId);
+        TaskView runningTask = getRunningTaskView();
         if (runningTask != null) {
             runningTask.setAlpha(isHidden ? 0 : mContentAlpha);
         }
@@ -745,7 +749,7 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
     }
 
     public void showNextTask() {
-        TaskView runningTaskView = getTaskView(mRunningTaskId);
+        TaskView runningTaskView = getRunningTaskView();
         if (runningTaskView == null) {
             // Launch the first task
             if (getTaskViewCount() > 0) {
@@ -773,7 +777,7 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
     }
 
     private void applyRunningTaskIconScale() {
-        TaskView firstTask = getTaskView(mRunningTaskId);
+        TaskView firstTask = getRunningTaskView();
         if (firstTask != null) {
             firstTask.setIconScaleAndDim(mRunningTaskIconScaledDown ? 0 : 1);
         }
@@ -781,7 +785,7 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
 
     public void animateUpRunningTaskIconScale() {
         mRunningTaskIconScaledDown = false;
-        TaskView firstTask = getTaskView(mRunningTaskId);
+        TaskView firstTask = getRunningTaskView();
         if (firstTask != null) {
             firstTask.animateIconScaleAndDimIntoView();
         }
-- 
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