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

2 files changed, 32 insertions, 2 deletions

diff --git a/services/java/com/android/server/InputManager.java b/services/java/com/android/server/InputManager.java
index b44fe00..ba39c57 100644
--- a/services/java/com/android/server/InputManager.java
+++ b/services/java/com/android/server/InputManager.java
@@ -411,7 +411,13 @@ public class InputManager {
             return mContext.getResources().getBoolean(
                     com.android.internal.R.bool.config_filterJumpyTouchEvents);
         }
-        
+
+        @SuppressWarnings("unused")
+        public int getVirtualKeyQuietTimeMillis() {
+            return mContext.getResources().getInteger(
+                    com.android.internal.R.integer.config_virtualKeyQuietTimeMillis);
+        }
+
         @SuppressWarnings("unused")
         public VirtualKeyDefinition[] getVirtualKeyDefinitions(String deviceName) {
             ArrayList<VirtualKeyDefinition> keys = new ArrayList<VirtualKeyDefinition>();
diff --git a/services/jni/com_android_server_InputManager.cpp b/services/jni/com_android_server_InputManager.cpp
index 693d630..171471e 100644
--- a/services/jni/com_android_server_InputManager.cpp
+++ b/services/jni/com_android_server_InputManager.cpp
@@ -55,6 +55,7 @@ static struct {
     jmethodID checkInjectEventsPermission;
     jmethodID filterTouchEvents;
     jmethodID filterJumpyTouchEvents;
+    jmethodID getVirtualKeyQuietTimeMillis;
     jmethodID getVirtualKeyDefinitions;
     jmethodID getInputDeviceCalibration;
     jmethodID getExcludedDeviceNames;
@@ -183,6 +184,7 @@ public:
             int32_t* width, int32_t* height, int32_t* orientation);
     virtual bool filterTouchEvents();
     virtual bool filterJumpyTouchEvents();
+    virtual nsecs_t getVirtualKeyQuietTime();
     virtual void getVirtualKeyDefinitions(const String8& deviceName,
             Vector<VirtualKeyDefinition>& outVirtualKeyDefinitions);
     virtual void getInputDeviceCalibration(const String8& deviceName,
@@ -233,6 +235,7 @@ private:
     // Cached filtering policies.
     int32_t mFilterTouchEvents;
     int32_t mFilterJumpyTouchEvents;
+    nsecs_t mVirtualKeyQuietTime;
 
     // Cached throttling policy.
     int32_t mMaxEventsPerSecond;
@@ -264,7 +267,7 @@ private:
 // ----------------------------------------------------------------------------
 
 NativeInputManager::NativeInputManager(jobject callbacksObj) :
-    mFilterTouchEvents(-1), mFilterJumpyTouchEvents(-1),
+    mFilterTouchEvents(-1), mFilterJumpyTouchEvents(-1), mVirtualKeyQuietTime(-1),
     mMaxEventsPerSecond(-1),
     mDisplayWidth(-1), mDisplayHeight(-1), mDisplayOrientation(ROTATION_0) {
     JNIEnv* env = jniEnv();
@@ -451,6 +454,24 @@ bool NativeInputManager::filterJumpyTouchEvents() {
     return mFilterJumpyTouchEvents;
 }
 
+nsecs_t NativeInputManager::getVirtualKeyQuietTime() {
+    if (mVirtualKeyQuietTime < 0) {
+        JNIEnv* env = jniEnv();
+
+        jint result = env->CallIntMethod(mCallbacksObj,
+                gCallbacksClassInfo.getVirtualKeyQuietTimeMillis);
+        if (checkAndClearExceptionFromCallback(env, "getVirtualKeyQuietTimeMillis")) {
+            result = 0;
+        }
+        if (result < 0) {
+            result = 0;
+        }
+
+        mVirtualKeyQuietTime = milliseconds_to_nanoseconds(result);
+    }
+    return mVirtualKeyQuietTime;
+}
+
 void NativeInputManager::getVirtualKeyDefinitions(const String8& deviceName,
         Vector<VirtualKeyDefinition>& outVirtualKeyDefinitions) {
     outVirtualKeyDefinitions.clear();
@@ -1351,6 +1372,9 @@ int register_android_server_InputManager(JNIEnv* env) {
     GET_METHOD_ID(gCallbacksClassInfo.filterJumpyTouchEvents, gCallbacksClassInfo.clazz,
             "filterJumpyTouchEvents", "()Z");
 
+    GET_METHOD_ID(gCallbacksClassInfo.getVirtualKeyQuietTimeMillis, gCallbacksClassInfo.clazz,
+            "getVirtualKeyQuietTimeMillis", "()I");
+
     GET_METHOD_ID(gCallbacksClassInfo.getVirtualKeyDefinitions, gCallbacksClassInfo.clazz,
             "getVirtualKeyDefinitions",
             "(Ljava/lang/String;)[Lcom/android/server/InputManager$VirtualKeyDefinition;");