Filter virtual keys after touches.

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: Ib912d4f8a4df9966a39cd537d3ec7c24afab7225

1 files changed, 25 insertions, 1 deletions

diff --git a/services/jni/com_android_server_InputManager.cpp b/services/jni/com_android_server_InputManager.cpp
index e04e4c3..5b329bb 100644
--- a/services/jni/com_android_server_InputManager.cpp
+++ b/services/jni/com_android_server_InputManager.cpp
@@ -62,6 +62,7 @@ static struct {
     jmethodID checkInjectEventsPermission;
     jmethodID filterTouchEvents;
     jmethodID filterJumpyTouchEvents;
+    jmethodID getVirtualKeyQuietTimeMillis;
     jmethodID getExcludedDeviceNames;
     jmethodID getMaxEventsPerSecond;
     jmethodID getPointerLayer;
@@ -159,6 +160,7 @@ public:
             int32_t* width, int32_t* height, int32_t* orientation);
     virtual bool filterTouchEvents();
     virtual bool filterJumpyTouchEvents();
+    virtual nsecs_t getVirtualKeyQuietTime();
     virtual void getExcludedDeviceNames(Vector<String8>& outExcludedDeviceNames);
     virtual sp<PointerControllerInterface> obtainPointerController(int32_t deviceId);
 
@@ -191,6 +193,7 @@ private:
     // Cached filtering policies.
     int32_t mFilterTouchEvents;
     int32_t mFilterJumpyTouchEvents;
+    nsecs_t mVirtualKeyQuietTime;
 
     // Cached throttling policy.
     int32_t mMaxEventsPerSecond;
@@ -219,7 +222,7 @@ private:
 
 
 NativeInputManager::NativeInputManager(jobject callbacksObj) :
-    mFilterTouchEvents(-1), mFilterJumpyTouchEvents(-1),
+    mFilterTouchEvents(-1), mFilterJumpyTouchEvents(-1), mVirtualKeyQuietTime(-1),
     mMaxEventsPerSecond(-1) {
     JNIEnv* env = jniEnv();
 
@@ -355,6 +358,24 @@ 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::getExcludedDeviceNames(Vector<String8>& outExcludedDeviceNames) {
     outExcludedDeviceNames.clear();
 
@@ -1155,6 +1176,9 @@ 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.getExcludedDeviceNames, gCallbacksClassInfo.clazz,
             "getExcludedDeviceNames", "()[Ljava/lang/String;");