Add new MotionEvent actions for button press and release.

Introduce ACTION_BUTTON_PRESS and ACTION_BUTTON_RELEASE as actions to
signal a button press or release. If these actions happen
simulanteously with a DOWN or UP event then they're explicitly
ordered to happen after the DOWN or preceding the UP in order to send
them to the most recently targeted view.

Also, introduce new stylus button constants that differ from the
constants we use for mouse buttons.

Bug: 20704355
Change-Id: Ib960a5004db5429ad2fc8db020704773e2978327
diff --git a/include/android/input.h b/include/android/input.h
index a660761..c7635b8 100644
--- a/include/android/input.h
+++ b/include/android/input.h
@@ -305,6 +305,12 @@
     /* The pointer is not down but has exited the boundaries of a window or view.
      */
     AMOTION_EVENT_ACTION_HOVER_EXIT = 10,
+
+    /* One or more buttons have been pressed. */
+    AMOTION_EVENT_ACTION_BUTTON_PRESS = 11,
+
+    /* One or more buttons have been released. */
+    AMOTION_EVENT_ACTION_BUTTON_RELEASE = 12,
 };
 
 /*
@@ -405,6 +411,8 @@
     AMOTION_EVENT_BUTTON_TERTIARY = 1 << 2,
     AMOTION_EVENT_BUTTON_BACK = 1 << 3,
     AMOTION_EVENT_BUTTON_FORWARD = 1 << 4,
+    AMOTION_EVENT_BUTTON_STYLUS_PRIMARY = 1 << 5,
+    AMOTION_EVENT_BUTTON_STYLUS_SECONDARY = 1 << 6,
 };
 
 /*
diff --git a/include/input/Input.h b/include/input/Input.h
index c360f63..1da8356 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -379,6 +379,10 @@
 
     inline int32_t getButtonState() const { return mButtonState; }
 
+    inline int32_t setButtonState(int32_t buttonState) { mButtonState = buttonState; }
+
+    inline int32_t getActionButton() const { return mActionButton; }
+
     inline float getXOffset() const { return mXOffset; }
 
     inline float getYOffset() const { return mYOffset; }
@@ -532,6 +536,7 @@
             int32_t deviceId,
             int32_t source,
             int32_t action,
+            int32_t actionButton,
             int32_t flags,
             int32_t edgeFlags,
             int32_t metaState,
@@ -584,6 +589,7 @@
 
 protected:
     int32_t mAction;
+    int32_t mActionButton;
     int32_t mFlags;
     int32_t mEdgeFlags;
     int32_t mMetaState;
diff --git a/include/input/InputTransport.h b/include/input/InputTransport.h
index e7e383b..6dc77b7 100644
--- a/include/input/InputTransport.h
+++ b/include/input/InputTransport.h
@@ -84,6 +84,7 @@
             int32_t deviceId;
             int32_t source;
             int32_t action;
+            int32_t actionButton;
             int32_t flags;
             int32_t metaState;
             int32_t buttonState;
@@ -232,6 +233,7 @@
             int32_t deviceId,
             int32_t source,
             int32_t action,
+            int32_t actionButton,
             int32_t flags,
             int32_t edgeFlags,
             int32_t metaState,
diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp
index 3a7afe9..2c1418e 100644
--- a/libs/input/Input.cpp
+++ b/libs/input/Input.cpp
@@ -216,6 +216,7 @@
         int32_t deviceId,
         int32_t source,
         int32_t action,
+        int32_t actionButton,
         int32_t flags,
         int32_t edgeFlags,
         int32_t metaState,
@@ -231,6 +232,7 @@
         const PointerCoords* pointerCoords) {
     InputEvent::initialize(deviceId, source);
     mAction = action;
+    mActionButton = actionButton;
     mFlags = flags;
     mEdgeFlags = edgeFlags;
     mMetaState = metaState;
@@ -250,6 +252,7 @@
 void MotionEvent::copyFrom(const MotionEvent* other, bool keepHistory) {
     InputEvent::initialize(other->mDeviceId, other->mSource);
     mAction = other->mAction;
+    mActionButton = other->mActionButton;
     mFlags = other->mFlags;
     mEdgeFlags = other->mEdgeFlags;
     mMetaState = other->mMetaState;
@@ -428,6 +431,7 @@
     mDeviceId = parcel->readInt32();
     mSource = parcel->readInt32();
     mAction = parcel->readInt32();
+    mActionButton = parcel->readInt32();
     mFlags = parcel->readInt32();
     mEdgeFlags = parcel->readInt32();
     mMetaState = parcel->readInt32();
@@ -475,6 +479,7 @@
     parcel->writeInt32(mDeviceId);
     parcel->writeInt32(mSource);
     parcel->writeInt32(mAction);
+    parcel->writeInt32(mActionButton);
     parcel->writeInt32(mFlags);
     parcel->writeInt32(mEdgeFlags);
     parcel->writeInt32(mMetaState);
diff --git a/libs/input/InputTransport.cpp b/libs/input/InputTransport.cpp
index 090ee53..0382f57 100644
--- a/libs/input/InputTransport.cpp
+++ b/libs/input/InputTransport.cpp
@@ -283,6 +283,7 @@
         int32_t deviceId,
         int32_t source,
         int32_t action,
+        int32_t actionButton,
         int32_t flags,
         int32_t edgeFlags,
         int32_t metaState,
@@ -298,12 +299,12 @@
         const PointerCoords* pointerCoords) {
 #if DEBUG_TRANSPORT_ACTIONS
     ALOGD("channel '%s' publisher ~ publishMotionEvent: seq=%u, deviceId=%d, source=0x%x, "
-            "action=0x%x, flags=0x%x, edgeFlags=0x%x, metaState=0x%x, buttonState=0x%x, "
-            "xOffset=%f, yOffset=%f, "
+            "action=0x%x, actionButton=0x%08x, flags=0x%x, edgeFlags=0x%x, "
+            "metaState=0x%x, buttonState=0x%x, xOffset=%f, yOffset=%f, "
             "xPrecision=%f, yPrecision=%f, downTime=%lld, eventTime=%lld, "
             "pointerCount=%" PRIu32,
             mChannel->getName().string(), seq,
-            deviceId, source, action, flags, edgeFlags, metaState, buttonState,
+            deviceId, source, action, actionButton, flags, edgeFlags, metaState, buttonState,
             xOffset, yOffset, xPrecision, yPrecision, downTime, eventTime, pointerCount);
 #endif
 
@@ -324,6 +325,7 @@
     msg.body.motion.deviceId = deviceId;
     msg.body.motion.source = source;
     msg.body.motion.action = action;
+    msg.body.motion.actionButton = actionButton;
     msg.body.motion.flags = flags;
     msg.body.motion.edgeFlags = edgeFlags;
     msg.body.motion.metaState = metaState;
@@ -907,6 +909,7 @@
             msg->body.motion.deviceId,
             msg->body.motion.source,
             msg->body.motion.action,
+            msg->body.motion.actionButton,
             msg->body.motion.flags,
             msg->body.motion.edgeFlags,
             msg->body.motion.metaState,
diff --git a/services/inputflinger/InputDispatcher.cpp b/services/inputflinger/InputDispatcher.cpp
index 9157bc1..a87cc77 100644
--- a/services/inputflinger/InputDispatcher.cpp
+++ b/services/inputflinger/InputDispatcher.cpp
@@ -119,7 +119,7 @@
     return true;
 }
 
-static bool isValidMotionAction(int32_t action, size_t pointerCount) {
+static bool isValidMotionAction(int32_t action, int32_t actionButton, int32_t pointerCount) {
     switch (action & AMOTION_EVENT_ACTION_MASK) {
     case AMOTION_EVENT_ACTION_DOWN:
     case AMOTION_EVENT_ACTION_UP:
@@ -136,14 +136,17 @@
         int32_t index = getMotionEventActionPointerIndex(action);
         return index >= 0 && size_t(index) < pointerCount;
     }
+    case AMOTION_EVENT_ACTION_BUTTON_PRESS:
+    case AMOTION_EVENT_ACTION_BUTTON_RELEASE:
+        return actionButton != 0;
     default:
         return false;
     }
 }
 
-static bool validateMotionEvent(int32_t action, size_t pointerCount,
+static bool validateMotionEvent(int32_t action, int32_t actionButton, size_t pointerCount,
         const PointerProperties* pointerProperties) {
-    if (! isValidMotionAction(action, pointerCount)) {
+    if (! isValidMotionAction(action, actionButton, pointerCount)) {
         ALOGE("Motion event has invalid action code 0x%x", action);
         return false;
     }
@@ -874,12 +877,12 @@
 void InputDispatcher::logOutboundMotionDetailsLocked(const char* prefix, const MotionEntry* entry) {
 #if DEBUG_OUTBOUND_EVENT_DETAILS
     ALOGD("%seventTime=%lld, deviceId=%d, source=0x%x, policyFlags=0x%x, "
-            "action=0x%x, flags=0x%x, "
-            "metaState=0x%x, buttonState=0x%x, "
+            "action=0x%x, actionButton=0x%x, flags=0x%x, "
+            "metaState=0x%x, buttonState=0x%x,"
             "edgeFlags=0x%x, xPrecision=%f, yPrecision=%f, downTime=%lld",
             prefix,
             entry->eventTime, entry->deviceId, entry->source, entry->policyFlags,
-            entry->action, entry->flags,
+            entry->action, entry->actionButton entry->flags,
             entry->metaState, entry->buttonState,
             entry->edgeFlags, entry->xPrecision, entry->yPrecision,
             entry->downTime);
@@ -1981,10 +1984,10 @@
             // Publish the motion event.
             status = connection->inputPublisher.publishMotionEvent(dispatchEntry->seq,
                     motionEntry->deviceId, motionEntry->source,
-                    dispatchEntry->resolvedAction, dispatchEntry->resolvedFlags,
-                    motionEntry->edgeFlags, motionEntry->metaState, motionEntry->buttonState,
-                    xOffset, yOffset,
-                    motionEntry->xPrecision, motionEntry->yPrecision,
+                    dispatchEntry->resolvedAction, motionEntry->actionButton,
+                    dispatchEntry->resolvedFlags, motionEntry->edgeFlags,
+                    motionEntry->metaState, motionEntry->buttonState,
+                    xOffset, yOffset, motionEntry->xPrecision, motionEntry->yPrecision,
                     motionEntry->downTime, motionEntry->eventTime,
                     motionEntry->pointerCount, motionEntry->pointerProperties,
                     usingCoords);
@@ -2298,6 +2301,7 @@
             originalMotionEntry->source,
             originalMotionEntry->policyFlags,
             action,
+            originalMotionEntry->actionButton,
             originalMotionEntry->flags,
             originalMotionEntry->metaState,
             originalMotionEntry->buttonState,
@@ -2432,10 +2436,10 @@
 void InputDispatcher::notifyMotion(const NotifyMotionArgs* args) {
 #if DEBUG_INBOUND_EVENT_DETAILS
     ALOGD("notifyMotion - eventTime=%lld, deviceId=%d, source=0x%x, policyFlags=0x%x, "
-            "action=0x%x, flags=0x%x, metaState=0x%x, buttonState=0x%x, edgeFlags=0x%x, "
-            "xPrecision=%f, yPrecision=%f, downTime=%lld",
+            "action=0x%x, actionButton=0x%x, flags=0x%x, metaState=0x%x, buttonState=0x%x,"
+            "edgeFlags=0x%x, xPrecision=%f, yPrecision=%f, downTime=%lld",
             args->eventTime, args->deviceId, args->source, args->policyFlags,
-            args->action, args->flags, args->metaState, args->buttonState,
+            args->action, args->actionButton, args->flags, args->metaState, args->buttonState,
             args->edgeFlags, args->xPrecision, args->yPrecision, args->downTime);
     for (uint32_t i = 0; i < args->pointerCount; i++) {
         ALOGD("  Pointer %d: id=%d, toolType=%d, "
@@ -2455,7 +2459,8 @@
                 args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION));
     }
 #endif
-    if (!validateMotionEvent(args->action, args->pointerCount, args->pointerProperties)) {
+    if (!validateMotionEvent(args->action, args->actionButton,
+                args->pointerCount, args->pointerProperties)) {
         return;
     }
 
@@ -2471,9 +2476,9 @@
             mLock.unlock();
 
             MotionEvent event;
-            event.initialize(args->deviceId, args->source, args->action, args->flags,
-                    args->edgeFlags, args->metaState, args->buttonState, 0, 0,
-                    args->xPrecision, args->yPrecision,
+            event.initialize(args->deviceId, args->source, args->action, args->actionButton,
+                    args->flags, args->edgeFlags, args->metaState, args->buttonState,
+                    0, 0, args->xPrecision, args->yPrecision,
                     args->downTime, args->eventTime,
                     args->pointerCount, args->pointerProperties, args->pointerCoords);
 
@@ -2488,7 +2493,8 @@
         // Just enqueue a new motion event.
         MotionEntry* newEntry = new MotionEntry(args->eventTime,
                 args->deviceId, args->source, policyFlags,
-                args->action, args->flags, args->metaState, args->buttonState,
+                args->action, args->actionButton, args->flags,
+                args->metaState, args->buttonState,
                 args->edgeFlags, args->xPrecision, args->yPrecision, args->downTime,
                 args->displayId,
                 args->pointerCount, args->pointerProperties, args->pointerCoords, 0, 0);
@@ -2589,7 +2595,8 @@
         int32_t action = motionEvent->getAction();
         size_t pointerCount = motionEvent->getPointerCount();
         const PointerProperties* pointerProperties = motionEvent->getPointerProperties();
-        if (! validateMotionEvent(action, pointerCount, pointerProperties)) {
+        int32_t actionButton = motionEvent->getActionButton();
+        if (! validateMotionEvent(action, actionButton, pointerCount, pointerProperties)) {
             return INPUT_EVENT_INJECTION_FAILED;
         }
 
@@ -2603,7 +2610,7 @@
         const PointerCoords* samplePointerCoords = motionEvent->getSamplePointerCoords();
         firstInjectedEntry = new MotionEntry(*sampleEventTimes,
                 motionEvent->getDeviceId(), motionEvent->getSource(), policyFlags,
-                action, motionEvent->getFlags(),
+                action, actionButton, motionEvent->getFlags(),
                 motionEvent->getMetaState(), motionEvent->getButtonState(),
                 motionEvent->getEdgeFlags(),
                 motionEvent->getXPrecision(), motionEvent->getYPrecision(),
@@ -2616,7 +2623,7 @@
             samplePointerCoords += pointerCount;
             MotionEntry* nextInjectedEntry = new MotionEntry(*sampleEventTimes,
                     motionEvent->getDeviceId(), motionEvent->getSource(), policyFlags,
-                    action, motionEvent->getFlags(),
+                    action, actionButton, motionEvent->getFlags(),
                     motionEvent->getMetaState(), motionEvent->getButtonState(),
                     motionEvent->getEdgeFlags(),
                     motionEvent->getXPrecision(), motionEvent->getYPrecision(),
@@ -3907,18 +3914,18 @@
 
 // --- InputDispatcher::MotionEntry ---
 
-InputDispatcher::MotionEntry::MotionEntry(nsecs_t eventTime,
-        int32_t deviceId, uint32_t source, uint32_t policyFlags, int32_t action, int32_t flags,
-        int32_t metaState, int32_t buttonState,
-        int32_t edgeFlags, float xPrecision, float yPrecision,
-        nsecs_t downTime, int32_t displayId, uint32_t pointerCount,
+InputDispatcher::MotionEntry::MotionEntry(nsecs_t eventTime, int32_t deviceId,
+        uint32_t source, uint32_t policyFlags, int32_t action, int32_t actionButton,
+        int32_t flags, int32_t metaState, int32_t buttonState, int32_t edgeFlags,
+        float xPrecision, float yPrecision, nsecs_t downTime,
+        int32_t displayId, uint32_t pointerCount,
         const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
         float xOffset, float yOffset) :
         EventEntry(TYPE_MOTION, eventTime, policyFlags),
         eventTime(eventTime),
-        deviceId(deviceId), source(source), action(action), flags(flags),
-        metaState(metaState), buttonState(buttonState), edgeFlags(edgeFlags),
-        xPrecision(xPrecision), yPrecision(yPrecision),
+        deviceId(deviceId), source(source), action(action), actionButton(actionButton),
+        flags(flags), metaState(metaState), buttonState(buttonState),
+        edgeFlags(edgeFlags), xPrecision(xPrecision), yPrecision(yPrecision),
         downTime(downTime), displayId(displayId), pointerCount(pointerCount) {
     for (uint32_t i = 0; i < pointerCount; i++) {
         this->pointerProperties[i].copyFrom(pointerProperties[i]);
@@ -3933,10 +3940,10 @@
 }
 
 void InputDispatcher::MotionEntry::appendDescription(String8& msg) const {
-    msg.appendFormat("MotionEvent(deviceId=%d, source=0x%08x, action=%d, "
-            "flags=0x%08x, metaState=0x%08x, buttonState=0x%08x, edgeFlags=0x%08x, "
-            "xPrecision=%.1f, yPrecision=%.1f, displayId=%d, pointers=[",
-            deviceId, source, action, flags, metaState, buttonState, edgeFlags,
+    msg.appendFormat("MotionEvent(deviceId=%d, source=0x%08x, action=%d, actionButton=0x%08x, "
+            "flags=0x%08x, metaState=0x%08x, buttonState=0x%08x, "
+            "edgeFlags=0x%08x, xPrecision=%.1f, yPrecision=%.1f, displayId=%d, pointers=[",
+            deviceId, source, action, actionButton, flags, metaState, buttonState, edgeFlags,
             xPrecision, yPrecision, displayId);
     for (uint32_t i = 0; i < pointerCount; i++) {
         if (i) {
@@ -4237,7 +4244,7 @@
                     memento.hovering
                             ? AMOTION_EVENT_ACTION_HOVER_EXIT
                             : AMOTION_EVENT_ACTION_CANCEL,
-                    memento.flags, 0, 0, 0,
+                    memento.flags, 0, 0, 0, 0,
                     memento.xPrecision, memento.yPrecision, memento.downTime,
                     memento.displayId,
                     memento.pointerCount, memento.pointerProperties, memento.pointerCoords,
diff --git a/services/inputflinger/InputDispatcher.h b/services/inputflinger/InputDispatcher.h
index 8c78a44..9a340c9 100644
--- a/services/inputflinger/InputDispatcher.h
+++ b/services/inputflinger/InputDispatcher.h
@@ -504,6 +504,7 @@
         int32_t deviceId;
         uint32_t source;
         int32_t action;
+        int32_t actionButton;
         int32_t flags;
         int32_t metaState;
         int32_t buttonState;
@@ -518,10 +519,10 @@
 
         MotionEntry(nsecs_t eventTime,
                 int32_t deviceId, uint32_t source, uint32_t policyFlags,
-                int32_t action, int32_t flags,
+                int32_t action, int32_t actionButton, int32_t flags,
                 int32_t metaState, int32_t buttonState, int32_t edgeFlags,
-                float xPrecision, float yPrecision,
-                nsecs_t downTime, int32_t displayId, uint32_t pointerCount,
+                float xPrecision, float yPrecision, nsecs_t downTime,
+                int32_t displayId, uint32_t pointerCount,
                 const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
                 float xOffset, float yOffset);
         virtual void appendDescription(String8& msg) const;
diff --git a/services/inputflinger/InputListener.cpp b/services/inputflinger/InputListener.cpp
index 85bb0ed..dded47d 100644
--- a/services/inputflinger/InputListener.cpp
+++ b/services/inputflinger/InputListener.cpp
@@ -68,12 +68,13 @@
 
 NotifyMotionArgs::NotifyMotionArgs(nsecs_t eventTime, int32_t deviceId, uint32_t source,
         uint32_t policyFlags,
-        int32_t action, int32_t flags, int32_t metaState, int32_t buttonState,
-        int32_t edgeFlags, int32_t displayId, uint32_t pointerCount,
+        int32_t action, int32_t actionButton, int32_t flags, int32_t metaState,
+        int32_t buttonState, int32_t edgeFlags, int32_t displayId, uint32_t pointerCount,
         const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
         float xPrecision, float yPrecision, nsecs_t downTime) :
         eventTime(eventTime), deviceId(deviceId), source(source), policyFlags(policyFlags),
-        action(action), flags(flags), metaState(metaState), buttonState(buttonState),
+        action(action), actionButton(actionButton),
+        flags(flags), metaState(metaState), buttonState(buttonState),
         edgeFlags(edgeFlags), displayId(displayId), pointerCount(pointerCount),
         xPrecision(xPrecision), yPrecision(yPrecision), downTime(downTime) {
     for (uint32_t i = 0; i < pointerCount; i++) {
@@ -85,10 +86,9 @@
 NotifyMotionArgs::NotifyMotionArgs(const NotifyMotionArgs& other) :
         eventTime(other.eventTime), deviceId(other.deviceId), source(other.source),
         policyFlags(other.policyFlags),
-        action(other.action), flags(other.flags),
+        action(other.action), actionButton(other.actionButton), flags(other.flags),
         metaState(other.metaState), buttonState(other.buttonState),
-        edgeFlags(other.edgeFlags), displayId(other.displayId),
-        pointerCount(other.pointerCount),
+        edgeFlags(other.edgeFlags), displayId(other.displayId), pointerCount(other.pointerCount),
         xPrecision(other.xPrecision), yPrecision(other.yPrecision), downTime(other.downTime) {
     for (uint32_t i = 0; i < pointerCount; i++) {
         pointerProperties[i].copyFrom(other.pointerProperties[i]);
diff --git a/services/inputflinger/InputListener.h b/services/inputflinger/InputListener.h
index 78ae10f..1ec09ce 100644
--- a/services/inputflinger/InputListener.h
+++ b/services/inputflinger/InputListener.h
@@ -84,6 +84,7 @@
     uint32_t source;
     uint32_t policyFlags;
     int32_t action;
+    int32_t actionButton;
     int32_t flags;
     int32_t metaState;
     int32_t buttonState;
@@ -99,7 +100,8 @@
     inline NotifyMotionArgs() { }
 
     NotifyMotionArgs(nsecs_t eventTime, int32_t deviceId, uint32_t source, uint32_t policyFlags,
-            int32_t action, int32_t flags, int32_t metaState, int32_t buttonState,
+            int32_t action, int32_t actionButton, int32_t flags,
+            int32_t metaState, int32_t buttonState,
             int32_t edgeFlags, int32_t displayId, uint32_t pointerCount,
             const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
             float xPrecision, float yPrecision, nsecs_t downTime);
diff --git a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp
index 2888785..b54503e 100644
--- a/services/inputflinger/InputReader.cpp
+++ b/services/inputflinger/InputReader.cpp
@@ -1442,10 +1442,10 @@
 uint32_t TouchButtonAccumulator::getButtonState() const {
     uint32_t result = 0;
     if (mBtnStylus) {
-        result |= AMOTION_EVENT_BUTTON_SECONDARY;
+        result |= AMOTION_EVENT_BUTTON_STYLUS_PRIMARY;
     }
     if (mBtnStylus2) {
-        result |= AMOTION_EVENT_BUTTON_TERTIARY;
+        result |= AMOTION_EVENT_BUTTON_STYLUS_SECONDARY;
     }
     return result;
 }
@@ -2547,7 +2547,8 @@
     }
     nsecs_t downTime = mDownTime;
     bool buttonsChanged = currentButtonState != lastButtonState;
-    bool buttonsPressed = currentButtonState & ~lastButtonState;
+    int32_t buttonsPressed = currentButtonState & ~lastButtonState;
+    int32_t buttonsReleased = lastButtonState & ~currentButtonState;
 
     float deltaX = mCursorMotionAccumulator.getRelativeX() * mXScale;
     float deltaY = mCursorMotionAccumulator.getRelativeY() * mYScale;
@@ -2623,6 +2624,7 @@
     // Send motion event.
     if (downChanged || moved || scrolled || buttonsChanged) {
         int32_t metaState = mContext->getGlobalMetaState();
+        int32_t buttonState = lastButtonState;
         int32_t motionEventAction;
         if (downChanged) {
             motionEventAction = down ? AMOTION_EVENT_ACTION_DOWN : AMOTION_EVENT_ACTION_UP;
@@ -2632,17 +2634,48 @@
             motionEventAction = AMOTION_EVENT_ACTION_HOVER_MOVE;
         }
 
+        if (buttonsReleased) {
+            BitSet32 released(buttonsReleased);
+            while (!released.isEmpty()) {
+                int32_t actionButton = BitSet32::valueForBit(released.clearFirstMarkedBit());
+                buttonState &= ~actionButton;
+                NotifyMotionArgs releaseArgs(when, getDeviceId(), mSource, policyFlags,
+                        AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton, 0,
+                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                        displayId, 1, &pointerProperties, &pointerCoords,
+                        mXPrecision, mYPrecision, downTime);
+                getListener()->notifyMotion(&releaseArgs);
+            }
+        }
+
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                motionEventAction, 0, metaState, currentButtonState, 0,
+                motionEventAction, 0, 0, metaState, currentButtonState,
+                AMOTION_EVENT_EDGE_FLAG_NONE,
                 displayId, 1, &pointerProperties, &pointerCoords,
                 mXPrecision, mYPrecision, downTime);
         getListener()->notifyMotion(&args);
 
+        if (buttonsPressed) {
+            BitSet32 pressed(buttonsPressed);
+            while (!pressed.isEmpty()) {
+                int32_t actionButton = BitSet32::valueForBit(pressed.clearFirstMarkedBit());
+                buttonState |= actionButton;
+                NotifyMotionArgs pressArgs(when, getDeviceId(), mSource, policyFlags,
+                        AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton, 0,
+                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                        displayId, 1, &pointerProperties, &pointerCoords,
+                        mXPrecision, mYPrecision, downTime);
+                getListener()->notifyMotion(&pressArgs);
+            }
+        }
+
+        ALOG_ASSERT(buttonState == currentButtonState);
+
         // Send hover move after UP to tell the application that the mouse is hovering now.
         if (motionEventAction == AMOTION_EVENT_ACTION_UP
                 && mPointerController != NULL) {
             NotifyMotionArgs hoverArgs(when, getDeviceId(), mSource, policyFlags,
-                    AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                    AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
                     metaState, currentButtonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                     displayId, 1, &pointerProperties, &pointerCoords,
                     mXPrecision, mYPrecision, downTime);
@@ -2655,7 +2688,7 @@
             pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
 
             NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
-                    AMOTION_EVENT_ACTION_SCROLL, 0, metaState, currentButtonState,
+                    AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, currentButtonState,
                     AMOTION_EVENT_EDGE_FLAG_NONE,
                     displayId, 1, &pointerProperties, &pointerCoords,
                     mXPrecision, mYPrecision, downTime);
@@ -2787,8 +2820,7 @@
     dump.appendFormat(INDENT4 "TiltYCenter: %0.3f\n", mTiltYCenter);
     dump.appendFormat(INDENT4 "TiltYScale: %0.3f\n", mTiltYScale);
 
-    dump.appendFormat(INDENT3 "Last Button State: 0x%08x\n", mLastRawState.buttonState);
-
+    dump.appendFormat(INDENT3 "Last Raw Button State: 0x%08x\n", mLastRawState.buttonState);
     dump.appendFormat(INDENT3 "Last Raw Touch: pointerCount=%d\n",
             mLastRawState.rawPointerData.pointerCount);
     for (uint32_t i = 0; i < mLastRawState.rawPointerData.pointerCount; i++) {
@@ -2804,6 +2836,7 @@
                 pointer.toolType, toString(pointer.isHovering));
     }
 
+    dump.appendFormat(INDENT3 "Last Cooked Button State: 0x%08x\n", mLastCookedState.buttonState);
     dump.appendFormat(INDENT3 "Last Cooked Touch: pointerCount=%d\n",
             mLastCookedState.cookedPointerData.pointerCount);
     for (uint32_t i = 0; i < mLastCookedState.cookedPointerData.pointerCount; i++) {
@@ -3994,7 +4027,7 @@
 
     // Synthesize key down from raw buttons if needed.
     synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
-            policyFlags, mLastRawState.buttonState, mCurrentRawState.buttonState);
+            policyFlags, mLastCookedState.buttonState, mCurrentCookedState.buttonState);
 
     // Dispatch the touches either directly or by translation through a pointer on screen.
     if (mDeviceMode == DEVICE_MODE_POINTER) {
@@ -4051,14 +4084,16 @@
                     mCurrentCookedState.cookedPointerData.touchingIdBits);
         }
 
+        dispatchButtonRelease(when, policyFlags);
         dispatchHoverExit(when, policyFlags);
         dispatchTouches(when, policyFlags);
         dispatchHoverEnterAndMove(when, policyFlags);
+        dispatchButtonPress(when, policyFlags);
     }
 
     // Synthesize key up from raw buttons if needed.
     synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
-            policyFlags, mLastRawState.buttonState, mCurrentRawState.buttonState);
+            policyFlags, mLastCookedState.buttonState, mCurrentCookedState.buttonState);
 
     // Clear some transient state.
     mCurrentRawState.rawVScroll = 0;
@@ -4070,7 +4105,7 @@
 }
 
 void TouchInputMapper::applyExternalStylusButtonState(nsecs_t when) {
-    if (mDeviceMode == DEVICE_MODE_DIRECT && hasExternalStylus()) {
+    if (mDeviceMode == DEVICE_MODE_DIRECT && hasExternalStylus() && mExternalStylusId != -1) {
         mCurrentRawState.buttonState |= mExternalStylusState.buttons;
     }
 }
@@ -4282,14 +4317,14 @@
     BitSet32 currentIdBits = mCurrentCookedState.cookedPointerData.touchingIdBits;
     BitSet32 lastIdBits = mLastCookedState.cookedPointerData.touchingIdBits;
     int32_t metaState = getContext()->getGlobalMetaState();
-    int32_t buttonState = mCurrentRawState.buttonState;
+    int32_t buttonState = mCurrentCookedState.buttonState;
 
     if (currentIdBits == lastIdBits) {
         if (!currentIdBits.isEmpty()) {
             // No pointer id changes so this is a move event.
             // The listener takes care of batching moves so we don't have to deal with that here.
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState,
+                    AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
                     AMOTION_EVENT_EDGE_FLAG_NONE,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
@@ -4315,7 +4350,7 @@
                 mLastCookedState.cookedPointerData.pointerCoords,
                 mLastCookedState.cookedPointerData.idToIndex,
                 moveIdBits);
-        if (buttonState != mLastRawState.buttonState) {
+        if (buttonState != mLastCookedState.buttonState) {
             moveNeeded = true;
         }
 
@@ -4324,12 +4359,11 @@
             uint32_t upId = upIdBits.clearFirstMarkedBit();
 
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_POINTER_UP, 0, metaState, buttonState, 0,
+                    AMOTION_EVENT_ACTION_POINTER_UP, 0, 0, metaState, buttonState, 0,
                     mLastCookedState.cookedPointerData.pointerProperties,
                     mLastCookedState.cookedPointerData.pointerCoords,
                     mLastCookedState.cookedPointerData.idToIndex,
-                    dispatchedIdBits, upId,
-                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+                    dispatchedIdBits, upId, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
             dispatchedIdBits.clearBit(upId);
         }
 
@@ -4339,12 +4373,11 @@
         if (moveNeeded && !moveIdBits.isEmpty()) {
             ALOG_ASSERT(moveIdBits.value == dispatchedIdBits.value);
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, 0,
+                    AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState, 0,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex,
-                    dispatchedIdBits, -1,
-                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+                    dispatchedIdBits, -1, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
         }
 
         // Dispatch pointer down events using the new pointer locations.
@@ -4358,12 +4391,11 @@
             }
 
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, metaState, buttonState, 0,
+                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0, metaState, buttonState, 0,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex,
-                    dispatchedIdBits, downId,
-                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+                    dispatchedIdBits, downId, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
         }
     }
 }
@@ -4374,7 +4406,7 @@
                     || !mCurrentCookedState.cookedPointerData.touchingIdBits.isEmpty())) {
         int32_t metaState = getContext()->getGlobalMetaState();
         dispatchMotion(when, policyFlags, mSource,
-                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, metaState, mLastRawState.buttonState, 0,
+                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState, mLastCookedState.buttonState, 0,
                 mLastCookedState.cookedPointerData.pointerProperties,
                 mLastCookedState.cookedPointerData.pointerCoords,
                 mLastCookedState.cookedPointerData.idToIndex,
@@ -4390,7 +4422,7 @@
         int32_t metaState = getContext()->getGlobalMetaState();
         if (!mSentHoverEnter) {
             dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_ENTER,
-                    0, metaState, mCurrentRawState.buttonState, 0,
+                    0, 0, metaState, mCurrentRawState.buttonState, 0,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex,
@@ -4400,7 +4432,7 @@
         }
 
         dispatchMotion(when, policyFlags, mSource,
-                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, metaState,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
                 mCurrentRawState.buttonState, 0,
                 mCurrentCookedState.cookedPointerData.pointerProperties,
                 mCurrentCookedState.cookedPointerData.pointerCoords,
@@ -4410,6 +4442,48 @@
     }
 }
 
+void TouchInputMapper::dispatchButtonRelease(nsecs_t when, uint32_t policyFlags) {
+    BitSet32 releasedButtons(mLastCookedState.buttonState & ~mCurrentCookedState.buttonState);
+    const BitSet32& idBits = findActiveIdBits(mLastCookedState.cookedPointerData);
+    const int32_t metaState = getContext()->getGlobalMetaState();
+    int32_t buttonState = mLastCookedState.buttonState;
+    while (!releasedButtons.isEmpty()) {
+        int32_t actionButton = BitSet32::valueForBit(releasedButtons.clearFirstMarkedBit());
+        buttonState &= ~actionButton;
+        dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton,
+                    0, metaState, buttonState, 0,
+                    mCurrentCookedState.cookedPointerData.pointerProperties,
+                    mCurrentCookedState.cookedPointerData.pointerCoords,
+                    mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+    }
+}
+
+void TouchInputMapper::dispatchButtonPress(nsecs_t when, uint32_t policyFlags) {
+    BitSet32 pressedButtons(mCurrentCookedState.buttonState & ~mLastCookedState.buttonState);
+    const BitSet32& idBits = findActiveIdBits(mCurrentCookedState.cookedPointerData);
+    const int32_t metaState = getContext()->getGlobalMetaState();
+    int32_t buttonState = mLastCookedState.buttonState;
+    while (!pressedButtons.isEmpty()) {
+        int32_t actionButton = BitSet32::valueForBit(pressedButtons.clearFirstMarkedBit());
+        buttonState |= actionButton;
+        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton,
+                    0, metaState, buttonState, 0,
+                    mCurrentCookedState.cookedPointerData.pointerProperties,
+                    mCurrentCookedState.cookedPointerData.pointerCoords,
+                    mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+    }
+}
+
+const BitSet32& TouchInputMapper::findActiveIdBits(const CookedPointerData& cookedPointerData) {
+    if (!cookedPointerData.touchingIdBits.isEmpty()) {
+        return cookedPointerData.touchingIdBits;
+    }
+    return cookedPointerData.hoveringIdBits;
+}
+
 void TouchInputMapper::cookPointerData() {
     uint32_t currentPointerCount = mCurrentRawState.rawPointerData.pointerCount;
 
@@ -4420,6 +4494,12 @@
     mCurrentCookedState.cookedPointerData.touchingIdBits =
             mCurrentRawState.rawPointerData.touchingIdBits;
 
+    if (mCurrentCookedState.cookedPointerData.pointerCount == 0) {
+        mCurrentCookedState.buttonState = 0;
+    } else {
+        mCurrentCookedState.buttonState = mCurrentRawState.buttonState;
+    }
+
     // Walk through the the active pointers and map device coordinates onto
     // surface coordinates and adjust for display orientation.
     for (uint32_t i = 0; i < currentPointerCount; i++) {
@@ -4766,7 +4846,7 @@
 
     // Send events!
     int32_t metaState = getContext()->getGlobalMetaState();
-    int32_t buttonState = mCurrentRawState.buttonState;
+    int32_t buttonState = mCurrentCookedState.buttonState;
 
     // Update last coordinates of pointers that have moved so that we observe the new
     // pointer positions at the same time as other pointers that have just gone up.
@@ -4787,7 +4867,7 @@
                 mPointerGesture.lastGestureProperties,
                 mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
                 movedGestureIdBits);
-        if (buttonState != mLastRawState.buttonState) {
+        if (buttonState != mLastCookedState.buttonState) {
             moveNeeded = true;
         }
     }
@@ -4797,12 +4877,12 @@
     if (!dispatchedGestureIdBits.isEmpty()) {
         if (cancelPreviousGesture) {
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_CANCEL, 0, metaState, buttonState,
+                    AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState, buttonState,
                     AMOTION_EVENT_EDGE_FLAG_NONE,
                     mPointerGesture.lastGestureProperties,
                     mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
-                    dispatchedGestureIdBits, -1,
-                    0, 0, mPointerGesture.downTime);
+                    dispatchedGestureIdBits, -1, 0,
+                    0, mPointerGesture.downTime);
 
             dispatchedGestureIdBits.clear();
         } else {
@@ -4817,7 +4897,7 @@
                 uint32_t id = upGestureIdBits.clearFirstMarkedBit();
 
                 dispatchMotion(when, policyFlags, mSource,
-                        AMOTION_EVENT_ACTION_POINTER_UP, 0,
+                        AMOTION_EVENT_ACTION_POINTER_UP, 0, 0,
                         metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                         mPointerGesture.lastGestureProperties,
                         mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
@@ -4832,7 +4912,8 @@
     // Send motion events for all pointers that moved.
     if (moveNeeded) {
         dispatchMotion(when, policyFlags, mSource,
-                AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
+                AMOTION_EVENT_EDGE_FLAG_NONE,
                 mPointerGesture.currentGestureProperties,
                 mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
                 dispatchedGestureIdBits, -1,
@@ -4852,7 +4933,7 @@
             }
 
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, metaState, buttonState, 0,
+                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0, metaState, buttonState, 0,
                     mPointerGesture.currentGestureProperties,
                     mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
                     dispatchedGestureIdBits, id,
@@ -4863,7 +4944,7 @@
     // Send motion events for hover.
     if (mPointerGesture.currentGestureMode == PointerGesture::HOVER) {
         dispatchMotion(when, policyFlags, mSource,
-                AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
                 metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                 mPointerGesture.currentGestureProperties,
                 mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
@@ -4889,7 +4970,7 @@
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
 
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
                 metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                 mViewport.displayId, 1, &pointerProperties, &pointerCoords,
                 0, 0, mPointerGesture.downTime);
@@ -4920,7 +5001,7 @@
         int32_t metaState = getContext()->getGlobalMetaState();
         int32_t buttonState = mCurrentRawState.buttonState;
         dispatchMotion(when, policyFlags, mSource,
-                AMOTION_EVENT_ACTION_CANCEL, 0, metaState, buttonState,
+                AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState, buttonState,
                 AMOTION_EVENT_EDGE_FLAG_NONE,
                 mPointerGesture.lastGestureProperties,
                 mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
@@ -5815,7 +5896,7 @@
 
         // Send up.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                 AMOTION_EVENT_ACTION_UP, 0, metaState, mLastRawState.buttonState, 0,
+                 AMOTION_EVENT_ACTION_UP, 0, 0, metaState, mLastRawState.buttonState, 0,
                  mViewport.displayId,
                  1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
                  mOrientedXPrecision, mOrientedYPrecision,
@@ -5828,7 +5909,7 @@
 
         // Send hover exit.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, metaState, mLastRawState.buttonState, 0,
+                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState, mLastRawState.buttonState, 0,
                 mViewport.displayId,
                 1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
                 mOrientedXPrecision, mOrientedYPrecision,
@@ -5843,7 +5924,7 @@
 
             // Send down.
             NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                    AMOTION_EVENT_ACTION_DOWN, 0, metaState, mCurrentRawState.buttonState, 0,
+                    AMOTION_EVENT_ACTION_DOWN, 0, 0, metaState, mCurrentRawState.buttonState, 0,
                     mViewport.displayId,
                     1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
                     mOrientedXPrecision, mOrientedYPrecision,
@@ -5853,7 +5934,7 @@
 
         // Send move.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_MOVE, 0, metaState, mCurrentRawState.buttonState, 0,
+                AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, mCurrentRawState.buttonState, 0,
                 mViewport.displayId,
                 1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
                 mOrientedXPrecision, mOrientedYPrecision,
@@ -5867,7 +5948,7 @@
 
             // Send hover enter.
             NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, metaState,
+                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, 0, metaState,
                     mCurrentRawState.buttonState, 0,
                     mViewport.displayId,
                     1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
@@ -5878,7 +5959,7 @@
 
         // Send hover move.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, metaState,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
                 mCurrentRawState.buttonState, 0,
                 mViewport.displayId,
                 1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
@@ -5900,7 +5981,7 @@
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
 
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_SCROLL, 0, metaState, mCurrentRawState.buttonState, 0,
+                AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, mCurrentRawState.buttonState, 0,
                 mViewport.displayId,
                 1, &mPointerSimple.currentProperties, &pointerCoords,
                 mOrientedXPrecision, mOrientedYPrecision,
@@ -5925,10 +6006,11 @@
 }
 
 void TouchInputMapper::dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
-        int32_t action, int32_t flags, int32_t metaState, int32_t buttonState, int32_t edgeFlags,
+        int32_t action, int32_t actionButton, int32_t flags,
+        int32_t metaState, int32_t buttonState, int32_t edgeFlags,
         const PointerProperties* properties, const PointerCoords* coords,
-        const uint32_t* idToIndex, BitSet32 idBits,
-        int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime) {
+        const uint32_t* idToIndex, BitSet32 idBits, int32_t changedId,
+        float xPrecision, float yPrecision, nsecs_t downTime) {
     PointerCoords pointerCoords[MAX_POINTERS];
     PointerProperties pointerProperties[MAX_POINTERS];
     uint32_t pointerCount = 0;
@@ -5962,7 +6044,7 @@
     }
 
     NotifyMotionArgs args(when, getDeviceId(), source, policyFlags,
-            action, flags, metaState, buttonState, edgeFlags,
+            action, actionButton, flags, metaState, buttonState, edgeFlags,
             mViewport.displayId, pointerCount, pointerProperties, pointerCoords,
             xPrecision, yPrecision, downTime);
     getListener()->notifyMotion(&args);
@@ -6879,7 +6961,7 @@
     uint32_t policyFlags = 0;
 
     NotifyMotionArgs args(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, policyFlags,
-            AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+            AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
             ADISPLAY_ID_NONE, 1, &pointerProperties, &pointerCoords, 0, 0, 0);
     getListener()->notifyMotion(&args);
 }
diff --git a/services/inputflinger/InputReader.h b/services/inputflinger/InputReader.h
index ae090c1..4062ec7 100644
--- a/services/inputflinger/InputReader.h
+++ b/services/inputflinger/InputReader.h
@@ -1432,11 +1432,14 @@
         BitSet32 stylusIdBits;
         BitSet32 mouseIdBits;
 
+        int32_t buttonState;
+
         void copyFrom(const CookedState& other) {
             cookedPointerData.copyFrom(other.cookedPointerData);
             fingerIdBits = other.fingerIdBits;
             stylusIdBits = other.stylusIdBits;
             mouseIdBits = other.mouseIdBits;
+            buttonState = other.buttonState;
         }
 
         void clear() {
@@ -1444,6 +1447,7 @@
             fingerIdBits.clear();
             stylusIdBits.clear();
             mouseIdBits.clear();
+            buttonState = 0;
         }
     };
 
@@ -1794,6 +1798,9 @@
     void dispatchTouches(nsecs_t when, uint32_t policyFlags);
     void dispatchHoverExit(nsecs_t when, uint32_t policyFlags);
     void dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags);
+    void dispatchButtonRelease(nsecs_t when, uint32_t policyFlags);
+    void dispatchButtonPress(nsecs_t when, uint32_t policyFlags);
+    const BitSet32& findActiveIdBits(const CookedPointerData& cookedPointerData);
     void cookPointerData();
 
     void dispatchPointerUsage(nsecs_t when, uint32_t policyFlags, PointerUsage pointerUsage);
@@ -1824,8 +1831,8 @@
     // method will take care of setting the index and transmuting the action to DOWN or UP
     // it is the first / last pointer to go down / up.
     void dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
-            int32_t action, int32_t flags, int32_t metaState, int32_t buttonState,
-            int32_t edgeFlags,
+            int32_t action, int32_t actionButton,
+            int32_t flags, int32_t metaState, int32_t buttonState, int32_t edgeFlags,
             const PointerProperties* properties, const PointerCoords* coords,
             const uint32_t* idToIndex, BitSet32 idBits,
             int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime);
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index 9b68986..2d8eaef 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -150,7 +150,7 @@
 
     // Rejects undefined motion actions.
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            /*action*/ -1, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            /*action*/ -1, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -161,7 +161,7 @@
     // Rejects pointer down with invalid index.
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
             AMOTION_EVENT_ACTION_POINTER_DOWN | (1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT),
-            0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -171,7 +171,7 @@
 
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
             AMOTION_EVENT_ACTION_POINTER_DOWN | (-1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT),
-            0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -182,7 +182,7 @@
     // Rejects pointer up with invalid index.
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
             AMOTION_EVENT_ACTION_POINTER_UP | (1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT),
-            0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -192,7 +192,7 @@
 
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
             AMOTION_EVENT_ACTION_POINTER_UP | (-1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT),
-            0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -202,7 +202,7 @@
 
     // Rejects motion events with invalid number of pointers.
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            AMOTION_EVENT_ACTION_DOWN, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            AMOTION_EVENT_ACTION_DOWN, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 0, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -211,7 +211,7 @@
             << "Should reject motion events with 0 pointers.";
 
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            AMOTION_EVENT_ACTION_DOWN, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            AMOTION_EVENT_ACTION_DOWN, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ MAX_POINTERS + 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -222,7 +222,7 @@
     // Rejects motion events with invalid pointer ids.
     pointerProperties[0].id = -1;
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            AMOTION_EVENT_ACTION_DOWN, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            AMOTION_EVENT_ACTION_DOWN, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -232,7 +232,7 @@
 
     pointerProperties[0].id = MAX_POINTER_ID + 1;
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            AMOTION_EVENT_ACTION_DOWN, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            AMOTION_EVENT_ACTION_DOWN, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -244,7 +244,7 @@
     pointerProperties[0].id = 1;
     pointerProperties[1].id = 1;
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            AMOTION_EVENT_ACTION_DOWN, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            AMOTION_EVENT_ACTION_DOWN, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 2, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(