From 17488b9944389ab23dde992a4753e183ef64b6f6 Mon Sep 17 00:00:00 2001
From: Jason Monk <jmonk@google.com>
Date: Thu, 6 Nov 2014 11:26:14 -0500
Subject: [PATCH] Show recents button while pinned and locked

When an app is show when locked and in screen pinning the 'overview'
button needs to be shown, regardless of its disabled state.

Bug: 18224921
Change-Id: I896c803347738c936873c0ce5a7480562eb9f639
---
 .../statusbar/phone/NavigationBarView.java     | 18 +++++++++++++++++-
 .../statusbar/phone/PhoneStatusBar.java        |  4 ++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
index 9bb52e71ddd7c..1e4dfb4b1251c 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
@@ -21,6 +21,7 @@ import android.animation.LayoutTransition.TransitionListener;
 import android.animation.ObjectAnimator;
 import android.animation.TimeInterpolator;
 import android.animation.ValueAnimator;
+import android.app.ActivityManagerNative;
 import android.app.StatusBarManager;
 import android.content.Context;
 import android.content.res.Configuration;
@@ -30,6 +31,7 @@ import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.os.Handler;
 import android.os.Message;
+import android.os.RemoteException;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.Display;
@@ -43,6 +45,7 @@ import android.view.inputmethod.InputMethodManager;
 import android.widget.FrameLayout;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
+
 import com.android.systemui.R;
 import com.android.systemui.statusbar.BaseStatusBar;
 import com.android.systemui.statusbar.DelegateViewHelper;
@@ -332,7 +335,7 @@ public class NavigationBarView extends LinearLayout {
         mDisabledFlags = disabledFlags;
 
         final boolean disableHome = ((disabledFlags & View.STATUS_BAR_DISABLE_HOME) != 0);
-        final boolean disableRecent = ((disabledFlags & View.STATUS_BAR_DISABLE_RECENT) != 0);
+        boolean disableRecent = ((disabledFlags & View.STATUS_BAR_DISABLE_RECENT) != 0);
         final boolean disableBack = ((disabledFlags & View.STATUS_BAR_DISABLE_BACK) != 0)
                 && ((mNavigationIconHints & StatusBarManager.NAVIGATION_HINT_BACK_ALT) == 0);
         final boolean disableSearch = ((disabledFlags & View.STATUS_BAR_DISABLE_SEARCH) != 0);
@@ -357,6 +360,11 @@ public class NavigationBarView extends LinearLayout {
                 }
             }
         }
+        if (inLockTask() && disableRecent && !disableHome) {
+            // Don't hide recents when in lock task, it is used for exiting.
+            // Unless home is hidden, then in DPM locked mode and no exit available.
+            disableRecent = false;
+        }
 
         getBackButton()   .setVisibility(disableBack       ? View.INVISIBLE : View.VISIBLE);
         getHomeButton()   .setVisibility(disableHome       ? View.INVISIBLE : View.VISIBLE);
@@ -365,6 +373,14 @@ public class NavigationBarView extends LinearLayout {
         mBarTransitions.applyBackButtonQuiescentAlpha(mBarTransitions.getMode(), true /*animate*/);
     }
 
+    private boolean inLockTask() {
+        try {
+            return ActivityManagerNative.getDefault().isInLockTaskMode();
+        } catch (RemoteException e) {
+            return false;
+        }
+    }
+
     private void setVisibleOrGone(View view, boolean visible) {
         if (view != null) {
             view.setVisibility(visible ? VISIBLE : GONE);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index 84ebcdfbf4d61..59288451fb7ab 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -3968,6 +3968,8 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,
                 // long-pressed 'together'
                 if ((time - mLastLockToAppLongPress) < LOCK_TO_APP_GESTURE_TOLERENCE) {
                     activityManager.stopLockTaskModeOnCurrent();
+                    // When exiting refresh disabled flags.
+                    mNavigationBarView.setDisabledFlags(mDisabled, true);
                 } else if ((v.getId() == R.id.back)
                         && !mNavigationBarView.getRecentsButton().isPressed()) {
                     // If we aren't pressing recents right now then they presses
@@ -3983,6 +3985,8 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,
                     // When in accessibility mode a long press that is recents (not back)
                     // should stop lock task.
                     activityManager.stopLockTaskModeOnCurrent();
+                    // When exiting refresh disabled flags.
+                    mNavigationBarView.setDisabledFlags(mDisabled, true);
                 }
             }
             if (sendBackLongPress) {