Hooks for subclasses to react to home presses.

This provides the nessecary hooks for GEL so that it can prevent
scrolling to the home screen when a search is open, instead choosing to
dismiss the search.

Bug: 11128544
Change-Id: I3c1b67bc271c1342db4a0abac364f2923bdeba3a

1 files changed, 18 insertions, 1 deletions

diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 50b6573d1..d674ef5eb 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -1880,7 +1880,7 @@ public class Launcher extends Activity
             // In all these cases, only animate if we're already on home
             mWorkspace.exitWidgetResizeMode();
             if (alreadyOnHome && mState == State.WORKSPACE && !mWorkspace.isTouchActive() &&
-                    openFolder == null) {
+                    openFolder == null && shouldMoveToDefaultScreenOnHomeIntent()) {
                 mWorkspace.moveToDefaultScreen(true);
             }
 
@@ -1906,6 +1906,8 @@ public class Launcher extends Activity
             if (mAppsCustomizeLayout != null) {
                 mAppsCustomizeLayout.reset();
             }
+
+            onHomeIntent();
         }
 
         if (DEBUG_RESUME_TIME) {
@@ -1913,6 +1915,21 @@ public class Launcher extends Activity
         }
     }
 
+    /**
+     * Override point for subclasses to prevent movement to the default screen when the home
+     * button is pressed. Used (for example) in GEL, to prevent movement during a search.
+     */
+    protected boolean shouldMoveToDefaultScreenOnHomeIntent() {
+        return true;
+    }
+
+    /**
+     * Override point for subclasses to provide custom behaviour for when a home intent is fired.
+     */
+    protected void onHomeIntent() {
+        // Do nothing
+    }
+
     @Override
     public void onRestoreInstanceState(Bundle state) {
         super.onRestoreInstanceState(state);