Hardware key custom rebinding (1/2)

Framework changes to allow rebinding of the actions performed on the following
key press events: Home long-press, menu press, menu long-press, search press,
search long-press, app-switch press and app-switch long-press.

The available actions are: Nothing, open/close menu, recent apps switcher,
search assistant, voice search and in-app search.

Patch Set 1: Initial port from ICS [done by Konstantin Koslowski]
Patch Set 2: Added 'assist' (search) key customisation
             Option for ICS-style in-app search, in addition to jellybean-style
             search assistant.
             Fixed double haptic feedback on virtual key press.
Patch Set 3: Checkbox to enable/disable all custom bindings.
             Home long-press defaults to no action on devices with
             an app-switch key.
Patch Set 4: The recent apps list will be preloaded on the initial down press
             of whichever key to which it is bound.
Patch Set 5: Fixed menu virtual key press sometimes performing the custom
             action bound to the menu key instead of just opening or closing
             the menu as it should.

Conflicts:
	core/res/res/values/public.xml
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

Change-Id: I72c0d220a09d79230bfa299e0521ed693e5c25f1

2 files changed, 86 insertions, 1 deletions

diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index db2598f..9f66bc7 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -2896,6 +2896,76 @@ public final class Settings {
         public static final String LOCKSCREEN_VIBRATE_ENABLED = "lockscreen.vibrate_enabled";
 
         /**
+         * Whether to enable custom rebindings of the actions performed on
+         * certain key press events.
+         * @hide
+         */
+        public static final String HARDWARE_KEY_REBINDING = "hardware_key_rebinding";
+
+         /**
+          * Action to perform when the home key is long-pressed. (Default is 2)
+          * 0 - Nothing
+          * 1 - Menu
+          * 2 - App-switch
+          * 3 - Search
+          * 4 - Voice search
+          * 5 - In-app search
+          * @hide
+          */
+         public static final String KEY_HOME_LONG_PRESS_ACTION = "key_home_long_press_action";
+
+         /**
+          * Action to perform when the menu key is pressed. (Default is 1)
+          * (See KEY_HOME_LONG_PRESS_ACTION for valid values)
+          * @hide
+          */
+         public static final String KEY_MENU_ACTION = "key_menu_action";
+
+         /**
+          * Action to perform when the menu key is long-pressed.
+          * (Default is 0 on devices with a search key, 3 on devices without)
+          * (See KEY_HOME_LONG_PRESS_ACTION for valid values)
+          * @hide
+          */
+         public static final String KEY_MENU_LONG_PRESS_ACTION = "key_menu_long_press_action";
+
+         /**
+          * Action to perform when the assistant (search) key is pressed. (Default is 3)
+          * (See KEY_HOME_LONG_PRESS_ACTION for valid values)
+          * @hide
+          */
+         public static final String KEY_ASSIST_ACTION = "key_assist_action";
+
+         /**
+          * Action to perform when the assistant (search) key is long-pressed. (Default is 4)
+          * (See KEY_HOME_LONG_PRESS_ACTION for valid values)
+          * @hide
+          */
+         public static final String KEY_ASSIST_LONG_PRESS_ACTION = "key_assist_long_press_action";
+
+         /**
+          * Action to perform when the app switch key is pressed. (Default is 2)
+          * (See KEY_HOME_LONG_PRESS_ACTION for valid values)
+          * @hide
+          */
+         public static final String KEY_APP_SWITCH_ACTION = "key_app_switch_action";
+
+         /**
+          * Action to perform when the app switch key is long-pressed. (Default is 0)
+          * (See KEY_HOME_LONG_PRESS_ACTION for valid values)
+          * @hide
+          */
+         public static final String KEY_APP_SWITCH_LONG_PRESS_ACTION = "key_app_switch_long_press_action";
+
+        /**
+         * Control the display of the action overflow button within app UI.
+         * 0 = use system default
+         * 1 = force on
+         * @hide
+         */
+        public static final String UI_FORCE_OVERFLOW_BUTTON = "ui_force_overflow_button";
+
+        /**
          * Settings to backup. This is here so that it's in the same place as the settings
          * keys and easy to update.
          *
diff --git a/core/java/android/view/ViewConfiguration.java b/core/java/android/view/ViewConfiguration.java
index 499075e..73295a2 100644
--- a/core/java/android/view/ViewConfiguration.java
+++ b/core/java/android/view/ViewConfiguration.java
@@ -223,6 +223,8 @@ public class ViewConfiguration {
     private boolean sHasPermanentMenuKey;
     private boolean sHasPermanentMenuKeySet;
 
+    private Context mContext;
+
     static final SparseArray<ViewConfiguration> sConfigurations =
             new SparseArray<ViewConfiguration>(2);
 
@@ -270,6 +272,8 @@ public class ViewConfiguration {
             sizeAndDensity = density;
         }
 
+        mContext = context;
+
         mEdgeSlop = (int) (sizeAndDensity * EDGE_SLOP + 0.5f);
         mFadingEdgeLength = (int) (sizeAndDensity * FADING_EDGE_LENGTH + 0.5f);
         mMinimumFlingVelocity = (int) (density * MINIMUM_FLING_VELOCITY + 0.5f);
@@ -678,7 +682,18 @@ public class ViewConfiguration {
      * @return true if a permanent menu key is present, false otherwise.
      */
     public boolean hasPermanentMenuKey() {
-        return sHasPermanentMenuKey;
+        // The action overflow button within app UI can
+        // be controlled with a system setting
+        int showOverflowButton = Settings.System.getInt(
+                mContext.getContentResolver(),
+                Settings.System.UI_FORCE_OVERFLOW_BUTTON, 0);
+        if (showOverflowButton == 1) {
+            // Force overflow button on by reporting that
+            // the device has no permanent menu key
+            return false;
+        } else {
+            return sHasPermanentMenuKey;
+        }
     }
 
     /**