Add support for secure views.

Added the MotionEvent.FLAG_WINDOW_IS_OBSCURED flag which is set by the
input manager whenever another visible window is partly or wholly obscured
the target of a touch event so that applications can filter touches
accordingly.

Added a "filterTouchesWhenObscured" attribute to View which can be used to
enable filtering of touches when the view's window is obscured.

Change-Id: I936d9c85013fd2d77fb296a600528d30a29027d2

1 files changed, 20 insertions, 8 deletions

diff --git a/include/ui/InputDispatcher.h b/include/ui/InputDispatcher.h
index aed4fa112b14..711a658c3598 100644
--- a/include/ui/InputDispatcher.h
+++ b/include/ui/InputDispatcher.h
@@ -84,14 +84,22 @@ struct InputTarget {
          * current event is delivered to this target or a timeout occurs. */
         FLAG_SYNC = 0x01,
 
-        /* This flag indicates that a MotionEvent with ACTION_DOWN falls outside of the area of
-         * this target and so should instead be delivered as an ACTION_OUTSIDE to this target. */
+        /* This flag indicates that a MotionEvent with AMOTION_EVENT_ACTION_DOWN falls outside
+         * of the area of this target and so should instead be delivered as an
+         * AMOTION_EVENT_ACTION_OUTSIDE to this target. */
         FLAG_OUTSIDE = 0x02,
 
         /* This flag indicates that a KeyEvent or MotionEvent is being canceled.
-         * In the case of a key event, it should be delivered with KeyEvent.FLAG_CANCELED set.
-         * In the case of a motion event, it should be delivered as MotionEvent.ACTION_CANCEL. */
-        FLAG_CANCEL = 0x04
+         * In the case of a key event, it should be delivered with flag
+         * AKEY_EVENT_FLAG_CANCELED set.
+         * In the case of a motion event, it should be delivered with action
+         * AMOTION_EVENT_ACTION_CANCEL instead. */
+        FLAG_CANCEL = 0x04,
+
+        /* This flag indicates that the target of a MotionEvent is partly or wholly
+         * obscured by another visible window above it.  The motion event should be
+         * delivered with flag AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED. */
+        FLAG_WINDOW_IS_OBSCURED = 0x08,
     };
 
     // The input channel to be targeted.
@@ -193,7 +201,8 @@ public:
             uint32_t policyFlags, int32_t action, int32_t flags, int32_t keyCode,
             int32_t scanCode, int32_t metaState, nsecs_t downTime) = 0;
     virtual void notifyMotion(nsecs_t eventTime, int32_t deviceId, int32_t source,
-            uint32_t policyFlags, int32_t action, int32_t metaState, int32_t edgeFlags,
+            uint32_t policyFlags, int32_t action, int32_t flags,
+            int32_t metaState, int32_t edgeFlags,
             uint32_t pointerCount, const int32_t* pointerIds, const PointerCoords* pointerCoords,
             float xPrecision, float yPrecision, nsecs_t downTime) = 0;
 
@@ -257,7 +266,8 @@ public:
             uint32_t policyFlags, int32_t action, int32_t flags, int32_t keyCode,
             int32_t scanCode, int32_t metaState, nsecs_t downTime);
     virtual void notifyMotion(nsecs_t eventTime, int32_t deviceId, int32_t source,
-            uint32_t policyFlags, int32_t action, int32_t metaState, int32_t edgeFlags,
+            uint32_t policyFlags, int32_t action, int32_t flags,
+            int32_t metaState, int32_t edgeFlags,
             uint32_t pointerCount, const int32_t* pointerIds, const PointerCoords* pointerCoords,
             float xPrecision, float yPrecision, nsecs_t downTime);
 
@@ -327,6 +337,7 @@ private:
         int32_t source;
         uint32_t policyFlags;
         int32_t action;
+        int32_t flags;
         int32_t metaState;
         int32_t edgeFlags;
         float xPrecision;
@@ -458,7 +469,8 @@ private:
                 int32_t repeatCount, nsecs_t downTime);
         MotionEntry* obtainMotionEntry(nsecs_t eventTime,
                 int32_t deviceId, int32_t source, uint32_t policyFlags, int32_t action,
-                int32_t metaState, int32_t edgeFlags, float xPrecision, float yPrecision,
+                int32_t flags, int32_t metaState, int32_t edgeFlags,
+                float xPrecision, float yPrecision,
                 nsecs_t downTime, uint32_t pointerCount,
                 const int32_t* pointerIds, const PointerCoords* pointerCoords);
         DispatchEntry* obtainDispatchEntry(EventEntry* eventEntry);