commit ae9fc03bdccda709101291bbcd3beaa5b6daebfc
author Jeff Brown <jeffbrown@google.com> Wed Aug 18 15:51:08 2010 -0700
committer Jeff Brown <jeffbrown@google.com> Wed Aug 18 16:58:27 2010 -0700
tree 69367f760a943f9eda3edabcb1130302ea6cb0d8
parent 6b2c56a299eb05deef2b887549e29e9e9f0f2cf6

Add support for throttling motion events.

Change-Id: I24b3a17753e91ecda60a60fe5cd2e6b3260e033d

services/jni/com_android_server_InputManager.cpp

diff --git a/services/jni/com_android_server_InputManager.cpp b/services/jni/com_android_server_InputManager.cpp
index ba58b43..59528db 100644
--- a/services/jni/com_android_server_InputManager.cpp
+++ b/services/jni/com_android_server_InputManager.cpp
@@ -139,6 +139,7 @@
     jmethodID filterJumpyTouchEvents;
     jmethodID getVirtualKeyDefinitions;
     jmethodID getExcludedDeviceNames;
+    jmethodID getMaxEventsPerSecond;
 } gCallbacksClassInfo;
 
 static struct {
@@ -249,6 +250,7 @@
             int32_t injectorPid, int32_t injectorUid, Vector<InputTarget>& outTargets);
     virtual int32_t waitForMotionEventTargets(MotionEvent* motionEvent, uint32_t policyFlags,
             int32_t injectorPid, int32_t injectorUid, Vector<InputTarget>& outTargets);
+    virtual int32_t getMaxEventsPerSecond();
 
 private:
     struct InputWindow {
@@ -310,6 +312,9 @@
     int32_t mFilterTouchEvents;
     int32_t mFilterJumpyTouchEvents;
 
+    // Cached throttling policy.
+    int32_t mMaxEventsPerSecond;
+
     // Cached display state.  (lock mDisplayLock)
     Mutex mDisplayLock;
     int32_t mDisplayWidth, mDisplayHeight;
@@ -400,6 +405,7 @@
 
 NativeInputManager::NativeInputManager(jobject callbacksObj) :
     mFilterTouchEvents(-1), mFilterJumpyTouchEvents(-1),
+    mMaxEventsPerSecond(-1),
     mDisplayWidth(-1), mDisplayHeight(-1), mDisplayOrientation(ROTATION_0),
     mDispatchEnabled(true), mDispatchFrozen(false), mWindowsReady(true),
     mFocusedWindow(NULL), mTouchDown(false), mTouchedWindow(NULL),
@@ -921,6 +927,21 @@
     }
 }
 
+int32_t NativeInputManager::getMaxEventsPerSecond() {
+    if (mMaxEventsPerSecond < 0) {
+        JNIEnv* env = jniEnv();
+
+        jint result = env->CallIntMethod(mCallbacksObj,
+                gCallbacksClassInfo.getMaxEventsPerSecond);
+        if (checkAndClearExceptionFromCallback(env, "getMaxEventsPerSecond")) {
+            result = 35;
+        }
+
+        mMaxEventsPerSecond = result;
+    }
+    return mMaxEventsPerSecond;
+}
+
 void NativeInputManager::setInputWindows(JNIEnv* env, jobjectArray windowObjArray) {
 #if DEBUG_FOCUS
     LOGD("setInputWindows");
@@ -2293,6 +2314,9 @@
     GET_METHOD_ID(gCallbacksClassInfo.getExcludedDeviceNames, gCallbacksClassInfo.clazz,
             "getExcludedDeviceNames", "()[Ljava/lang/String;");
 
+    GET_METHOD_ID(gCallbacksClassInfo.getMaxEventsPerSecond, gCallbacksClassInfo.clazz,
+            "getMaxEventsPerSecond", "()I");
+
     // VirtualKeyDefinition
 
     FIND_CLASS(gVirtualKeyDefinitionClassInfo.clazz,