From 01b0c5f55b57f97389ab4e85da5310da7145c6ce Mon Sep 17 00:00:00 2001
From: Bryce Lee <brycelee@google.com>
Date: Thu, 5 Feb 2015 18:24:04 -0800
Subject: [PATCH] Allow single press of physical button to go home without
 sleeping.

Bug: 18921423
Change-Id: Ic7ee7daeaf1b4e08a7c53451615736ee7a08fb61
---
 .../android/view/WindowManagerPolicy.java     |  8 ++++++
 .../policy/impl/PhoneWindowManager.java       | 26 +++++++++++++++----
 2 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/core/java/android/view/WindowManagerPolicy.java b/core/java/android/view/WindowManagerPolicy.java
index b8e94eee2ef20..780ca990c8418 100644
--- a/core/java/android/view/WindowManagerPolicy.java
+++ b/core/java/android/view/WindowManagerPolicy.java
@@ -17,6 +17,7 @@
 package android.view;
 
 import android.annotation.IntDef;
+import android.annotation.SystemApi;
 import android.content.Context;
 import android.content.pm.ActivityInfo;
 import android.content.res.CompatibilityInfo;
@@ -104,6 +105,13 @@ public interface WindowManagerPolicy {
      */
     public final static String EXTRA_HDMI_PLUGGED_STATE = "state";
 
+    /**
+     * Set to {@code true} when intent was invoked from pressing the home key.
+     * @hide
+     */
+    @SystemApi
+    public static final String EXTRA_FROM_HOME_KEY = "android.intent.extra.FROM_HOME_KEY";
+
     /**
      * Pass this event to the user / app.  To be returned from
      * {@link #interceptKeyBeforeQueueing}.
diff --git a/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
index 345520a7de6bd..b9dba81fb9f56 100644
--- a/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
+++ b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
@@ -153,6 +153,7 @@ public class PhoneWindowManager implements WindowManagerPolicy {
     static final int SHORT_PRESS_POWER_GO_TO_SLEEP = 1;
     static final int SHORT_PRESS_POWER_REALLY_GO_TO_SLEEP = 2;
     static final int SHORT_PRESS_POWER_REALLY_GO_TO_SLEEP_AND_GO_HOME = 3;
+    static final int SHORT_PRESS_POWER_GO_HOME = 4;
 
     static final int LONG_PRESS_POWER_NOTHING = 0;
     static final int LONG_PRESS_POWER_GLOBAL_ACTIONS = 1;
@@ -971,6 +972,9 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                             PowerManager.GO_TO_SLEEP_FLAG_NO_DOZE);
                     launchHomeFromHotKey();
                     break;
+                case SHORT_PRESS_POWER_GO_HOME:
+                    launchHomeFromHotKey();
+                    break;
             }
         }
     }
@@ -2991,7 +2995,7 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                         } catch (RemoteException e) {
                         }
                         sendCloseSystemWindows(SYSTEM_DIALOG_REASON_HOME_KEY);
-                        startDockOrHome();
+                        startDockOrHome(true /*fromHomeKey*/);
                     }
                 }
             });
@@ -3009,7 +3013,7 @@ public class PhoneWindowManager implements WindowManagerPolicy {
             } else {
                 // Otherwise, just launch Home
                 sendCloseSystemWindows(SYSTEM_DIALOG_REASON_HOME_KEY);
-                startDockOrHome();
+                startDockOrHome(true /*fromHomeKey*/);
             }
         }
     }
@@ -5821,19 +5825,31 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         return null;
     }
 
-    void startDockOrHome() {
+    void startDockOrHome(boolean fromHomeKey) {
         awakenDreams();
 
         Intent dock = createHomeDockIntent();
         if (dock != null) {
             try {
+                if (fromHomeKey) {
+                    dock.putExtra(WindowManagerPolicy.EXTRA_FROM_HOME_KEY, fromHomeKey);
+                }
                 mContext.startActivityAsUser(dock, UserHandle.CURRENT);
                 return;
             } catch (ActivityNotFoundException e) {
             }
         }
 
-        mContext.startActivityAsUser(mHomeIntent, UserHandle.CURRENT);
+        Intent intent;
+
+        if (fromHomeKey) {
+            intent = new Intent(mHomeIntent);
+            intent.putExtra(WindowManagerPolicy.EXTRA_FROM_HOME_KEY, fromHomeKey);
+        } else {
+            intent = mHomeIntent;
+        }
+
+        mContext.startActivityAsUser(intent, UserHandle.CURRENT);
     }
 
     /**
@@ -5848,7 +5864,7 @@ public class PhoneWindowManager implements WindowManagerPolicy {
             } catch (RemoteException e) {
             }
             sendCloseSystemWindows();
-            startDockOrHome();
+            startDockOrHome(false /*fromHomeKey*/);
         } else {
             // This code brings home to the front or, if it is already
             // at the front, puts the device to sleep.