Filter virtual keys after touches. (DO NOT MERGE)

Adds a new virtualKeyQuietTimeMillis configuration resource that sets
the duration for which virtual keys will be dropped after recent touches
on screen.  The default value is 0; it is intended to be overridden
per device using a resource overlay.

This change is designed to help in two cases:

1. Swipes from touchscreen into virtual key area.
2. Accidental taps in virtual key area while using on-screen keyboard.

Bug: 3089163
Change-Id: Id6733c83c2e2bc8d9553aa0e5c1fd74b741bec6e

1 files changed, 17 insertions, 0 deletions

diff --git a/include/ui/InputReader.h b/include/ui/InputReader.h
index 49351b0..7568ba7 100644
--- a/include/ui/InputReader.h
+++ b/include/ui/InputReader.h
@@ -103,6 +103,12 @@ public:
      */
     virtual bool filterJumpyTouchEvents() = 0;
 
+    /* Gets the amount of time to disable virtual keys after the screen is touched
+     * in order to filter out accidental virtual key presses due to swiping gestures
+     * or taps near the edge of the display.  May be 0 to disable the feature.
+     */
+    virtual nsecs_t getVirtualKeyQuietTime() = 0;
+
     /* Gets the configured virtual key definitions for an input device. */
     virtual void getVirtualKeyDefinitions(const String8& deviceName,
             Vector<VirtualKeyDefinition>& outVirtualKeyDefinitions) = 0;
@@ -177,6 +183,10 @@ public:
     virtual void updateGlobalMetaState() = 0;
     virtual int32_t getGlobalMetaState() = 0;
 
+    virtual void disableVirtualKeysUntil(nsecs_t time) = 0;
+    virtual bool shouldDropVirtualKey(nsecs_t now,
+            InputDevice* device, int32_t keyCode, int32_t scanCode) = 0;
+
     virtual InputReaderPolicyInterface* getPolicy() = 0;
     virtual InputDispatcherInterface* getDispatcher() = 0;
     virtual EventHubInterface* getEventHub() = 0;
@@ -264,6 +274,11 @@ private:
     InputConfiguration mInputConfiguration;
     void updateInputConfiguration();
 
+    nsecs_t mDisableVirtualKeysTimeout;
+    virtual void disableVirtualKeysUntil(nsecs_t time);
+    virtual bool shouldDropVirtualKey(nsecs_t now,
+            InputDevice* device, int32_t keyCode, int32_t scanCode);
+
     // state queries
     typedef int32_t (InputDevice::*GetStateFunc)(uint32_t sourceMask, int32_t code);
     int32_t getState(int32_t deviceId, uint32_t sourceMask, int32_t code,
@@ -585,6 +600,7 @@ protected:
         bool useBadTouchFilter;
         bool useJumpyTouchFilter;
         bool useAveragingTouchFilter;
+        nsecs_t virtualKeyQuietTime;
     } mParameters;
 
     // Immutable calibration parameters in parsed form.
@@ -810,6 +826,7 @@ private:
     void dispatchTouch(nsecs_t when, uint32_t policyFlags, TouchData* touch,
             BitSet32 idBits, uint32_t changedId, uint32_t pointerCount,
             int32_t motionEventAction);
+    void detectGestures(nsecs_t when);
 
     bool isPointInsideSurfaceLocked(int32_t x, int32_t y);
     const VirtualKey* findVirtualKeyHitLocked(int32_t x, int32_t y);