Add m-esr52 at 52.6.0

1 files changed, 6510 insertions, 0 deletions

diff --git a/widget/gonk/libui/InputReader.cpp b/widget/gonk/libui/InputReader.cpp
new file mode 100644
index 000000000..3699569aa
--- /dev/null
+++ b/widget/gonk/libui/InputReader.cpp
@@ -0,0 +1,6510 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "InputReader"
+
+//#define LOG_NDEBUG 0
+#include "cutils_log.h"
+
+// Log debug messages for each raw event received from the EventHub.
+#define DEBUG_RAW_EVENTS 0
+
+// Log debug messages about touch screen filtering hacks.
+#define DEBUG_HACKS 0
+
+// Log debug messages about virtual key processing.
+#define DEBUG_VIRTUAL_KEYS 0
+
+// Log debug messages about pointers.
+#define DEBUG_POINTERS 0
+
+// Log debug messages about pointer assignment calculations.
+#define DEBUG_POINTER_ASSIGNMENT 0
+
+// Log debug messages about gesture detection.
+#define DEBUG_GESTURES 0
+
+// Log debug messages about the vibrator.
+#define DEBUG_VIBRATOR 0
+
+#include "InputReader.h"
+
+#include "Keyboard.h"
+#include "VirtualKeyMap.h"
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <limits.h>
+#include <math.h>
+
+#define INDENT "  "
+#define INDENT2 "    "
+#define INDENT3 "      "
+#define INDENT4 "        "
+#define INDENT5 "          "
+
+namespace android {
+
+// --- Constants ---
+
+// Maximum number of slots supported when using the slot-based Multitouch Protocol B.
+static const size_t MAX_SLOTS = 32;
+
+// --- Static Functions ---
+
+template<typename T>
+inline static T abs(const T& value) {
+    return value < 0 ? - value : value;
+}
+
+template<typename T>
+inline static T min(const T& a, const T& b) {
+    return a < b ? a : b;
+}
+
+template<typename T>
+inline static void swap(T& a, T& b) {
+    T temp = a;
+    a = b;
+    b = temp;
+}
+
+inline static float avg(float x, float y) {
+    return (x + y) / 2;
+}
+
+inline static float distance(float x1, float y1, float x2, float y2) {
+    return hypotf(x1 - x2, y1 - y2);
+}
+
+inline static int32_t signExtendNybble(int32_t value) {
+    return value >= 8 ? value - 16 : value;
+}
+
+static inline const char* toString(bool value) {
+    return value ? "true" : "false";
+}
+
+static int32_t rotateValueUsingRotationMap(int32_t value, int32_t orientation,
+        const int32_t map[][4], size_t mapSize) {
+    if (orientation != DISPLAY_ORIENTATION_0) {
+        for (size_t i = 0; i < mapSize; i++) {
+            if (value == map[i][0]) {
+                return map[i][orientation];
+            }
+        }
+    }
+    return value;
+}
+
+static const int32_t keyCodeRotationMap[][4] = {
+        // key codes enumerated counter-clockwise with the original (unrotated) key first
+        // no rotation,        90 degree rotation,  180 degree rotation, 270 degree rotation
+        { AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT },
+        { AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN },
+        { AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT },
+        { AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP },
+};
+static const size_t keyCodeRotationMapSize =
+        sizeof(keyCodeRotationMap) / sizeof(keyCodeRotationMap[0]);
+
+static int32_t rotateKeyCode(int32_t keyCode, int32_t orientation) {
+    return rotateValueUsingRotationMap(keyCode, orientation,
+            keyCodeRotationMap, keyCodeRotationMapSize);
+}
+
+static void rotateDelta(int32_t orientation, float* deltaX, float* deltaY) {
+    float temp;
+    switch (orientation) {
+    case DISPLAY_ORIENTATION_90:
+        temp = *deltaX;
+        *deltaX = *deltaY;
+        *deltaY = -temp;
+        break;
+
+    case DISPLAY_ORIENTATION_180:
+        *deltaX = -*deltaX;
+        *deltaY = -*deltaY;
+        break;
+
+    case DISPLAY_ORIENTATION_270:
+        temp = *deltaX;
+        *deltaX = -*deltaY;
+        *deltaY = temp;
+        break;
+    }
+}
+
+static inline bool sourcesMatchMask(uint32_t sources, uint32_t sourceMask) {
+    return (sources & sourceMask & ~ AINPUT_SOURCE_CLASS_MASK) != 0;
+}
+
+// Returns true if the pointer should be reported as being down given the specified
+// button states.  This determines whether the event is reported as a touch event.
+static bool isPointerDown(int32_t buttonState) {
+    return buttonState &
+            (AMOTION_EVENT_BUTTON_PRIMARY | AMOTION_EVENT_BUTTON_SECONDARY
+                    | AMOTION_EVENT_BUTTON_TERTIARY);
+}
+
+static float calculateCommonVector(float a, float b) {
+    if (a > 0 && b > 0) {
+        return a < b ? a : b;
+    } else if (a < 0 && b < 0) {
+        return a > b ? a : b;
+    } else {
+        return 0;
+    }
+}
+
+static void synthesizeButtonKey(InputReaderContext* context, int32_t action,
+        nsecs_t when, int32_t deviceId, uint32_t source,
+        uint32_t policyFlags, int32_t lastButtonState, int32_t currentButtonState,
+        int32_t buttonState, int32_t keyCode) {
+    if (
+            (action == AKEY_EVENT_ACTION_DOWN
+                    && !(lastButtonState & buttonState)
+                    && (currentButtonState & buttonState))
+            || (action == AKEY_EVENT_ACTION_UP
+                    && (lastButtonState & buttonState)
+                    && !(currentButtonState & buttonState))) {
+        NotifyKeyArgs args(when, deviceId, source, policyFlags,
+                action, 0, keyCode, 0, context->getGlobalMetaState(), when);
+        context->getListener()->notifyKey(&args);
+    }
+}
+
+static void synthesizeButtonKeys(InputReaderContext* context, int32_t action,
+        nsecs_t when, int32_t deviceId, uint32_t source,
+        uint32_t policyFlags, int32_t lastButtonState, int32_t currentButtonState) {
+    synthesizeButtonKey(context, action, when, deviceId, source, policyFlags,
+            lastButtonState, currentButtonState,
+            AMOTION_EVENT_BUTTON_BACK, AKEYCODE_BACK);
+    synthesizeButtonKey(context, action, when, deviceId, source, policyFlags,
+            lastButtonState, currentButtonState,
+            AMOTION_EVENT_BUTTON_FORWARD, AKEYCODE_FORWARD);
+}
+
+
+// --- InputReaderConfiguration ---
+
+bool InputReaderConfiguration::getDisplayInfo(bool external, DisplayViewport* outViewport) const {
+    const DisplayViewport& viewport = external ? mExternalDisplay : mInternalDisplay;
+    if (viewport.displayId >= 0) {
+        *outViewport = viewport;
+        return true;
+    }
+    return false;
+}
+
+void InputReaderConfiguration::setDisplayInfo(bool external, const DisplayViewport& viewport) {
+    DisplayViewport& v = external ? mExternalDisplay : mInternalDisplay;
+    v = viewport;
+}
+
+
+// --- InputReader ---
+
+InputReader::InputReader(const sp<EventHubInterface>& eventHub,
+        const sp<InputReaderPolicyInterface>& policy,
+        const sp<InputListenerInterface>& listener) :
+        mContext(this), mEventHub(eventHub), mPolicy(policy),
+        mGlobalMetaState(0), mGeneration(1),
+        mDisableVirtualKeysTimeout(LLONG_MIN), mNextTimeout(LLONG_MAX),
+        mConfigurationChangesToRefresh(0) {
+    mQueuedListener = new QueuedInputListener(listener);
+
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        refreshConfigurationLocked(0);
+        updateGlobalMetaStateLocked();
+    } // release lock
+}
+
+InputReader::~InputReader() {
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        delete mDevices.valueAt(i);
+    }
+}
+
+void InputReader::loopOnce() {
+    int32_t oldGeneration;
+    int32_t timeoutMillis;
+    bool inputDevicesChanged = false;
+    Vector<InputDeviceInfo> inputDevices;
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        oldGeneration = mGeneration;
+        timeoutMillis = -1;
+
+        uint32_t changes = mConfigurationChangesToRefresh;
+        if (changes) {
+            mConfigurationChangesToRefresh = 0;
+            timeoutMillis = 0;
+            refreshConfigurationLocked(changes);
+        } else if (mNextTimeout != LLONG_MAX) {
+            nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
+            timeoutMillis = toMillisecondTimeoutDelay(now, mNextTimeout);
+        }
+    } // release lock
+
+    size_t count = mEventHub->getEvents(timeoutMillis, mEventBuffer, EVENT_BUFFER_SIZE);
+
+    { // acquire lock
+        AutoMutex _l(mLock);
+        mReaderIsAliveCondition.broadcast();
+
+        if (count) {
+            processEventsLocked(mEventBuffer, count);
+        }
+
+        if (mNextTimeout != LLONG_MAX) {
+            nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
+            if (now >= mNextTimeout) {
+#if DEBUG_RAW_EVENTS
+                ALOGD("Timeout expired, latency=%0.3fms", (now - mNextTimeout) * 0.000001f);
+#endif
+                mNextTimeout = LLONG_MAX;
+                timeoutExpiredLocked(now);
+            }
+        }
+
+        if (oldGeneration != mGeneration) {
+            inputDevicesChanged = true;
+            getInputDevicesLocked(inputDevices);
+        }
+    } // release lock
+
+    // Send out a message that the describes the changed input devices.
+    if (inputDevicesChanged) {
+        mPolicy->notifyInputDevicesChanged(inputDevices);
+    }
+
+    // Flush queued events out to the listener.
+    // This must happen outside of the lock because the listener could potentially call
+    // back into the InputReader's methods, such as getScanCodeState, or become blocked
+    // on another thread similarly waiting to acquire the InputReader lock thereby
+    // resulting in a deadlock.  This situation is actually quite plausible because the
+    // listener is actually the input dispatcher, which calls into the window manager,
+    // which occasionally calls into the input reader.
+    mQueuedListener->flush();
+}
+
+void InputReader::processEventsLocked(const RawEvent* rawEvents, size_t count) {
+    for (const RawEvent* rawEvent = rawEvents; count;) {
+        int32_t type = rawEvent->type;
+        size_t batchSize = 1;
+        if (type < EventHubInterface::FIRST_SYNTHETIC_EVENT) {
+            int32_t deviceId = rawEvent->deviceId;
+            while (batchSize < count) {
+                if (rawEvent[batchSize].type >= EventHubInterface::FIRST_SYNTHETIC_EVENT
+                        || rawEvent[batchSize].deviceId != deviceId) {
+                    break;
+                }
+                batchSize += 1;
+            }
+#if DEBUG_RAW_EVENTS
+            ALOGD("BatchSize: %d Count: %d", batchSize, count);
+#endif
+            processEventsForDeviceLocked(deviceId, rawEvent, batchSize);
+        } else {
+            switch (rawEvent->type) {
+            case EventHubInterface::DEVICE_ADDED:
+                addDeviceLocked(rawEvent->when, rawEvent->deviceId);
+                break;
+            case EventHubInterface::DEVICE_REMOVED:
+                removeDeviceLocked(rawEvent->when, rawEvent->deviceId);
+                break;
+            case EventHubInterface::FINISHED_DEVICE_SCAN:
+                handleConfigurationChangedLocked(rawEvent->when);
+                break;
+            default:
+                ALOG_ASSERT(false); // can't happen
+                break;
+            }
+        }
+        count -= batchSize;
+        rawEvent += batchSize;
+    }
+}
+
+void InputReader::addDeviceLocked(nsecs_t when, int32_t deviceId) {
+    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+    if (deviceIndex >= 0) {
+        ALOGW("Ignoring spurious device added event for deviceId %d.", deviceId);
+        return;
+    }
+
+    InputDeviceIdentifier identifier = mEventHub->getDeviceIdentifier(deviceId);
+    uint32_t classes = mEventHub->getDeviceClasses(deviceId);
+
+    InputDevice* device = createDeviceLocked(deviceId, identifier, classes);
+    device->configure(when, &mConfig, 0);
+    device->reset(when);
+
+    if (device->isIgnored()) {
+        ALOGI("Device added: id=%d, name='%s' (ignored non-input device)", deviceId,
+                identifier.name.string());
+    } else {
+        ALOGI("Device added: id=%d, name='%s', sources=0x%08x", deviceId,
+                identifier.name.string(), device->getSources());
+    }
+
+    mDevices.add(deviceId, device);
+    bumpGenerationLocked();
+}
+
+void InputReader::removeDeviceLocked(nsecs_t when, int32_t deviceId) {
+    InputDevice* device = NULL;
+    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+    if (deviceIndex < 0) {
+        ALOGW("Ignoring spurious device removed event for deviceId %d.", deviceId);
+        return;
+    }
+
+    device = mDevices.valueAt(deviceIndex);
+    mDevices.removeItemsAt(deviceIndex, 1);
+    bumpGenerationLocked();
+
+    if (device->isIgnored()) {
+        ALOGI("Device removed: id=%d, name='%s' (ignored non-input device)",
+                device->getId(), device->getName().string());
+    } else {
+        ALOGI("Device removed: id=%d, name='%s', sources=0x%08x",
+                device->getId(), device->getName().string(), device->getSources());
+    }
+
+    device->reset(when);
+    delete device;
+}
+
+InputDevice* InputReader::createDeviceLocked(int32_t deviceId,
+        const InputDeviceIdentifier& identifier, uint32_t classes) {
+    InputDevice* device = new InputDevice(&mContext, deviceId, bumpGenerationLocked(),
+            identifier, classes);
+
+    // External devices.
+    if (classes & INPUT_DEVICE_CLASS_EXTERNAL) {
+        device->setExternal(true);
+    }
+
+    // Switch-like devices.
+    if (classes & INPUT_DEVICE_CLASS_SWITCH) {
+        device->addMapper(new SwitchInputMapper(device));
+    }
+
+    // Vibrator-like devices.
+    if (classes & INPUT_DEVICE_CLASS_VIBRATOR) {
+        device->addMapper(new VibratorInputMapper(device));
+    }
+
+    // Keyboard-like devices.
+    uint32_t keyboardSource = 0;
+    int32_t keyboardType = AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC;
+    if (classes & INPUT_DEVICE_CLASS_KEYBOARD) {
+        keyboardSource |= AINPUT_SOURCE_KEYBOARD;
+    }
+    if (classes & INPUT_DEVICE_CLASS_ALPHAKEY) {
+        keyboardType = AINPUT_KEYBOARD_TYPE_ALPHABETIC;
+    }
+    if (classes & INPUT_DEVICE_CLASS_DPAD) {
+        keyboardSource |= AINPUT_SOURCE_DPAD;
+    }
+    if (classes & INPUT_DEVICE_CLASS_GAMEPAD) {
+        keyboardSource |= AINPUT_SOURCE_GAMEPAD;
+    }
+
+    if (keyboardSource != 0) {
+        device->addMapper(new KeyboardInputMapper(device, keyboardSource, keyboardType));
+    }
+
+    // Cursor-like devices.
+    if (classes & INPUT_DEVICE_CLASS_CURSOR) {
+        device->addMapper(new CursorInputMapper(device));
+    }
+
+    // Touchscreens and touchpad devices.
+    if (classes & INPUT_DEVICE_CLASS_TOUCH_MT) {
+        device->addMapper(new MultiTouchInputMapper(device));
+    } else if (classes & INPUT_DEVICE_CLASS_TOUCH) {
+        device->addMapper(new SingleTouchInputMapper(device));
+    }
+
+    // Joystick-like devices.
+    if (classes & INPUT_DEVICE_CLASS_JOYSTICK) {
+        device->addMapper(new JoystickInputMapper(device));
+    }
+
+    return device;
+}
+
+void InputReader::processEventsForDeviceLocked(int32_t deviceId,
+        const RawEvent* rawEvents, size_t count) {
+    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+    if (deviceIndex < 0) {
+        ALOGW("Discarding event for unknown deviceId %d.", deviceId);
+        return;
+    }
+
+    InputDevice* device = mDevices.valueAt(deviceIndex);
+    if (device->isIgnored()) {
+        //ALOGD("Discarding event for ignored deviceId %d.", deviceId);
+        return;
+    }
+
+    device->process(rawEvents, count);
+}
+
+void InputReader::timeoutExpiredLocked(nsecs_t when) {
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        InputDevice* device = mDevices.valueAt(i);
+        if (!device->isIgnored()) {
+            device->timeoutExpired(when);
+        }
+    }
+}
+
+void InputReader::handleConfigurationChangedLocked(nsecs_t when) {
+    // Reset global meta state because it depends on the list of all configured devices.
+    updateGlobalMetaStateLocked();
+
+    // Enqueue configuration changed.
+    NotifyConfigurationChangedArgs args(when);
+    mQueuedListener->notifyConfigurationChanged(&args);
+}
+
+void InputReader::refreshConfigurationLocked(uint32_t changes) {
+    mPolicy->getReaderConfiguration(&mConfig);
+    mEventHub->setExcludedDevices(mConfig.excludedDeviceNames);
+
+    if (changes) {
+        ALOGI("Reconfiguring input devices.  changes=0x%08x", changes);
+        nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
+
+        if (changes & InputReaderConfiguration::CHANGE_MUST_REOPEN) {
+            mEventHub->requestReopenDevices();
+        } else {
+            for (size_t i = 0; i < mDevices.size(); i++) {
+                InputDevice* device = mDevices.valueAt(i);
+                device->configure(now, &mConfig, changes);
+            }
+        }
+    }
+}
+
+void InputReader::updateGlobalMetaStateLocked() {
+    mGlobalMetaState = 0;
+
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        InputDevice* device = mDevices.valueAt(i);
+        mGlobalMetaState |= device->getMetaState();
+    }
+}
+
+int32_t InputReader::getGlobalMetaStateLocked() {
+    return mGlobalMetaState;
+}
+
+void InputReader::disableVirtualKeysUntilLocked(nsecs_t time) {
+    mDisableVirtualKeysTimeout = time;
+}
+
+bool InputReader::shouldDropVirtualKeyLocked(nsecs_t now,
+        InputDevice* device, int32_t keyCode, int32_t scanCode) {
+    if (now < mDisableVirtualKeysTimeout) {
+        ALOGI("Dropping virtual key from device %s because virtual keys are "
+                "temporarily disabled for the next %0.3fms.  keyCode=%d, scanCode=%d",
+                device->getName().string(),
+                (mDisableVirtualKeysTimeout - now) * 0.000001,
+                keyCode, scanCode);
+        return true;
+    } else {
+        return false;
+    }
+}
+
+void InputReader::fadePointerLocked() {
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        InputDevice* device = mDevices.valueAt(i);
+        device->fadePointer();
+    }
+}
+
+void InputReader::requestTimeoutAtTimeLocked(nsecs_t when) {
+    if (when < mNextTimeout) {
+        mNextTimeout = when;
+        mEventHub->wake();
+    }
+}
+
+int32_t InputReader::bumpGenerationLocked() {
+    return ++mGeneration;
+}
+
+void InputReader::getInputDevices(Vector<InputDeviceInfo>& outInputDevices) {
+    AutoMutex _l(mLock);
+    getInputDevicesLocked(outInputDevices);
+}
+
+void InputReader::getInputDevicesLocked(Vector<InputDeviceInfo>& outInputDevices) {
+    outInputDevices.clear();
+
+    size_t numDevices = mDevices.size();
+    for (size_t i = 0; i < numDevices; i++) {
+        InputDevice* device = mDevices.valueAt(i);
+        if (!device->isIgnored()) {
+            outInputDevices.push();
+            device->getDeviceInfo(&outInputDevices.editTop());
+        }
+    }
+}
+
+int32_t InputReader::getKeyCodeState(int32_t deviceId, uint32_t sourceMask,
+        int32_t keyCode) {
+    AutoMutex _l(mLock);
+
+    return getStateLocked(deviceId, sourceMask, keyCode, &InputDevice::getKeyCodeState);
+}
+
+int32_t InputReader::getScanCodeState(int32_t deviceId, uint32_t sourceMask,
+        int32_t scanCode) {
+    AutoMutex _l(mLock);
+
+    return getStateLocked(deviceId, sourceMask, scanCode, &InputDevice::getScanCodeState);
+}
+
+int32_t InputReader::getSwitchState(int32_t deviceId, uint32_t sourceMask, int32_t switchCode) {
+    AutoMutex _l(mLock);
+
+    return getStateLocked(deviceId, sourceMask, switchCode, &InputDevice::getSwitchState);
+}
+
+int32_t InputReader::getStateLocked(int32_t deviceId, uint32_t sourceMask, int32_t code,
+        GetStateFunc getStateFunc) {
+    int32_t result = AKEY_STATE_UNKNOWN;
+    if (deviceId >= 0) {
+        ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+        if (deviceIndex >= 0) {
+            InputDevice* device = mDevices.valueAt(deviceIndex);
+            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
+                result = (device->*getStateFunc)(sourceMask, code);
+            }
+        }
+    } else {
+        size_t numDevices = mDevices.size();
+        for (size_t i = 0; i < numDevices; i++) {
+            InputDevice* device = mDevices.valueAt(i);
+            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
+                // If any device reports AKEY_STATE_DOWN or AKEY_STATE_VIRTUAL, return that
+                // value.  Otherwise, return AKEY_STATE_UP as long as one device reports it.
+                int32_t currentResult = (device->*getStateFunc)(sourceMask, code);
+                if (currentResult >= AKEY_STATE_DOWN) {
+                    return currentResult;
+                } else if (currentResult == AKEY_STATE_UP) {
+                    result = currentResult;
+                }
+            }
+        }
+    }
+    return result;
+}
+
+bool InputReader::hasKeys(int32_t deviceId, uint32_t sourceMask,
+        size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) {
+    AutoMutex _l(mLock);
+
+    memset(outFlags, 0, numCodes);
+    return markSupportedKeyCodesLocked(deviceId, sourceMask, numCodes, keyCodes, outFlags);
+}
+
+bool InputReader::markSupportedKeyCodesLocked(int32_t deviceId, uint32_t sourceMask,
+        size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) {
+    bool result = false;
+    if (deviceId >= 0) {
+        ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+        if (deviceIndex >= 0) {
+            InputDevice* device = mDevices.valueAt(deviceIndex);
+            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
+                result = device->markSupportedKeyCodes(sourceMask,
+                        numCodes, keyCodes, outFlags);
+            }
+        }
+    } else {
+        size_t numDevices = mDevices.size();
+        for (size_t i = 0; i < numDevices; i++) {
+            InputDevice* device = mDevices.valueAt(i);
+            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
+                result |= device->markSupportedKeyCodes(sourceMask,
+                        numCodes, keyCodes, outFlags);
+            }
+        }
+    }
+    return result;
+}
+
+void InputReader::requestRefreshConfiguration(uint32_t changes) {
+    AutoMutex _l(mLock);
+
+    if (changes) {
+        bool needWake = !mConfigurationChangesToRefresh;
+        mConfigurationChangesToRefresh |= changes;
+
+        if (needWake) {
+            mEventHub->wake();
+        }
+    }
+}
+
+void InputReader::vibrate(int32_t deviceId, const nsecs_t* pattern, size_t patternSize,
+        ssize_t repeat, int32_t token) {
+    AutoMutex _l(mLock);
+
+    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+    if (deviceIndex >= 0) {
+        InputDevice* device = mDevices.valueAt(deviceIndex);
+        device->vibrate(pattern, patternSize, repeat, token);
+    }
+}
+
+void InputReader::cancelVibrate(int32_t deviceId, int32_t token) {
+    AutoMutex _l(mLock);
+
+    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+    if (deviceIndex >= 0) {
+        InputDevice* device = mDevices.valueAt(deviceIndex);
+        device->cancelVibrate(token);
+    }
+}
+
+void InputReader::dump(String8& dump) {
+    AutoMutex _l(mLock);
+
+    mEventHub->dump(dump);
+    dump.append("\n");
+
+    dump.append("Input Reader State:\n");
+
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        mDevices.valueAt(i)->dump(dump);
+    }
+
+    dump.append(INDENT "Configuration:\n");
+    dump.append(INDENT2 "ExcludedDeviceNames: [");
+    for (size_t i = 0; i < mConfig.excludedDeviceNames.size(); i++) {
+        if (i != 0) {
+            dump.append(", ");
+        }
+        dump.append(mConfig.excludedDeviceNames.itemAt(i).string());
+    }
+    dump.append("]\n");
+    dump.appendFormat(INDENT2 "VirtualKeyQuietTime: %0.1fms\n",
+            mConfig.virtualKeyQuietTime * 0.000001f);
+
+    dump.appendFormat(INDENT2 "PointerVelocityControlParameters: "
+            "scale=%0.3f, lowThreshold=%0.3f, highThreshold=%0.3f, acceleration=%0.3f\n",
+            mConfig.pointerVelocityControlParameters.scale,
+            mConfig.pointerVelocityControlParameters.lowThreshold,
+            mConfig.pointerVelocityControlParameters.highThreshold,
+            mConfig.pointerVelocityControlParameters.acceleration);
+
+    dump.appendFormat(INDENT2 "WheelVelocityControlParameters: "
+            "scale=%0.3f, lowThreshold=%0.3f, highThreshold=%0.3f, acceleration=%0.3f\n",
+            mConfig.wheelVelocityControlParameters.scale,
+            mConfig.wheelVelocityControlParameters.lowThreshold,
+            mConfig.wheelVelocityControlParameters.highThreshold,
+            mConfig.wheelVelocityControlParameters.acceleration);
+
+    dump.appendFormat(INDENT2 "PointerGesture:\n");
+    dump.appendFormat(INDENT3 "Enabled: %s\n",
+            toString(mConfig.pointerGesturesEnabled));
+    dump.appendFormat(INDENT3 "QuietInterval: %0.1fms\n",
+            mConfig.pointerGestureQuietInterval * 0.000001f);
+    dump.appendFormat(INDENT3 "DragMinSwitchSpeed: %0.1fpx/s\n",
+            mConfig.pointerGestureDragMinSwitchSpeed);
+    dump.appendFormat(INDENT3 "TapInterval: %0.1fms\n",
+            mConfig.pointerGestureTapInterval * 0.000001f);
+    dump.appendFormat(INDENT3 "TapDragInterval: %0.1fms\n",
+            mConfig.pointerGestureTapDragInterval * 0.000001f);
+    dump.appendFormat(INDENT3 "TapSlop: %0.1fpx\n",
+            mConfig.pointerGestureTapSlop);
+    dump.appendFormat(INDENT3 "MultitouchSettleInterval: %0.1fms\n",
+            mConfig.pointerGestureMultitouchSettleInterval * 0.000001f);
+    dump.appendFormat(INDENT3 "MultitouchMinDistance: %0.1fpx\n",
+            mConfig.pointerGestureMultitouchMinDistance);
+    dump.appendFormat(INDENT3 "SwipeTransitionAngleCosine: %0.1f\n",
+            mConfig.pointerGestureSwipeTransitionAngleCosine);
+    dump.appendFormat(INDENT3 "SwipeMaxWidthRatio: %0.1f\n",
+            mConfig.pointerGestureSwipeMaxWidthRatio);
+    dump.appendFormat(INDENT3 "MovementSpeedRatio: %0.1f\n",
+            mConfig.pointerGestureMovementSpeedRatio);
+    dump.appendFormat(INDENT3 "ZoomSpeedRatio: %0.1f\n",
+            mConfig.pointerGestureZoomSpeedRatio);
+}
+
+void InputReader::monitor() {
+    // Acquire and release the lock to ensure that the reader has not deadlocked.
+    mLock.lock();
+    mEventHub->wake();
+    mReaderIsAliveCondition.wait(mLock);
+    mLock.unlock();
+
+    // Check the EventHub
+    mEventHub->monitor();
+}
+
+
+// --- InputReader::ContextImpl ---
+
+InputReader::ContextImpl::ContextImpl(InputReader* reader) :
+        mReader(reader) {
+}
+
+void InputReader::ContextImpl::updateGlobalMetaState() {
+    // lock is already held by the input loop
+    mReader->updateGlobalMetaStateLocked();
+}
+
+int32_t InputReader::ContextImpl::getGlobalMetaState() {
+    // lock is already held by the input loop
+    return mReader->getGlobalMetaStateLocked();
+}
+
+void InputReader::ContextImpl::disableVirtualKeysUntil(nsecs_t time) {
+    // lock is already held by the input loop
+    mReader->disableVirtualKeysUntilLocked(time);
+}
+
+bool InputReader::ContextImpl::shouldDropVirtualKey(nsecs_t now,
+        InputDevice* device, int32_t keyCode, int32_t scanCode) {
+    // lock is already held by the input loop
+    return mReader->shouldDropVirtualKeyLocked(now, device, keyCode, scanCode);
+}
+
+void InputReader::ContextImpl::fadePointer() {
+    // lock is already held by the input loop
+    mReader->fadePointerLocked();
+}
+
+void InputReader::ContextImpl::requestTimeoutAtTime(nsecs_t when) {
+    // lock is already held by the input loop
+    mReader->requestTimeoutAtTimeLocked(when);
+}
+
+int32_t InputReader::ContextImpl::bumpGeneration() {
+    // lock is already held by the input loop
+    return mReader->bumpGenerationLocked();
+}
+
+InputReaderPolicyInterface* InputReader::ContextImpl::getPolicy() {
+    return mReader->mPolicy.get();
+}
+
+InputListenerInterface* InputReader::ContextImpl::getListener() {
+    return mReader->mQueuedListener.get();
+}
+
+EventHubInterface* InputReader::ContextImpl::getEventHub() {
+    return mReader->mEventHub.get();
+}
+
+
+// --- InputReaderThread ---
+
+InputReaderThread::InputReaderThread(const sp<InputReaderInterface>& reader) :
+        Thread(/*canCallJava*/ true), mReader(reader) {
+}
+
+InputReaderThread::~InputReaderThread() {
+}
+
+bool InputReaderThread::threadLoop() {
+    mReader->loopOnce();
+    return true;
+}
+
+
+// --- InputDevice ---
+
+InputDevice::InputDevice(InputReaderContext* context, int32_t id, int32_t generation,
+        const InputDeviceIdentifier& identifier, uint32_t classes) :
+        mContext(context), mId(id), mGeneration(generation),
+        mIdentifier(identifier), mClasses(classes),
+        mSources(0), mIsExternal(false), mDropUntilNextSync(false) {
+}
+
+InputDevice::~InputDevice() {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        delete mMappers[i];
+    }
+    mMappers.clear();
+}
+
+void InputDevice::dump(String8& dump) {
+    InputDeviceInfo deviceInfo;
+    getDeviceInfo(& deviceInfo);
+
+    dump.appendFormat(INDENT "Device %d: %s\n", deviceInfo.getId(),
+            deviceInfo.getDisplayName().string());
+    dump.appendFormat(INDENT2 "Generation: %d\n", mGeneration);
+    dump.appendFormat(INDENT2 "IsExternal: %s\n", toString(mIsExternal));
+    dump.appendFormat(INDENT2 "Sources: 0x%08x\n", deviceInfo.getSources());
+    dump.appendFormat(INDENT2 "KeyboardType: %d\n", deviceInfo.getKeyboardType());
+
+    const Vector<InputDeviceInfo::MotionRange>& ranges = deviceInfo.getMotionRanges();
+    if (!ranges.isEmpty()) {
+        dump.append(INDENT2 "Motion Ranges:\n");
+        for (size_t i = 0; i < ranges.size(); i++) {
+            const InputDeviceInfo::MotionRange& range = ranges.itemAt(i);
+            const char* label = getAxisLabel(range.axis);
+            char name[32];
+            if (label) {
+                strncpy(name, label, sizeof(name));
+                name[sizeof(name) - 1] = '\0';
+            } else {
+                snprintf(name, sizeof(name), "%d", range.axis);
+            }
+            dump.appendFormat(INDENT3 "%s: source=0x%08x, "
+                    "min=%0.3f, max=%0.3f, flat=%0.3f, fuzz=%0.3f, resolution=%0.3f\n",
+                    name, range.source, range.min, range.max, range.flat, range.fuzz,
+                    range.resolution);
+        }
+    }
+
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->dump(dump);
+    }
+}
+
+void InputDevice::addMapper(InputMapper* mapper) {
+    mMappers.add(mapper);
+}
+
+void InputDevice::configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes) {
+    mSources = 0;
+
+    if (!isIgnored()) {
+        if (!changes) { // first time only
+            mContext->getEventHub()->getConfiguration(mId, &mConfiguration);
+        }
+
+        if (!changes || (changes & InputReaderConfiguration::CHANGE_KEYBOARD_LAYOUTS)) {
+            if (!(mClasses & INPUT_DEVICE_CLASS_VIRTUAL)) {
+                sp<KeyCharacterMap> keyboardLayout =
+                        mContext->getPolicy()->getKeyboardLayoutOverlay(mIdentifier.descriptor);
+                if (mContext->getEventHub()->setKeyboardLayoutOverlay(mId, keyboardLayout)) {
+                    bumpGeneration();
+                }
+            }
+        }
+
+        if (!changes || (changes & InputReaderConfiguration::CHANGE_DEVICE_ALIAS)) {
+            if (!(mClasses & INPUT_DEVICE_CLASS_VIRTUAL)) {
+                String8 alias = mContext->getPolicy()->getDeviceAlias(mIdentifier);
+                if (mAlias != alias) {
+                    mAlias = alias;
+                    bumpGeneration();
+                }
+            }
+        }
+
+        size_t numMappers = mMappers.size();
+        for (size_t i = 0; i < numMappers; i++) {
+            InputMapper* mapper = mMappers[i];
+            mapper->configure(when, config, changes);
+            mSources |= mapper->getSources();
+        }
+    }
+}
+
+void InputDevice::reset(nsecs_t when) {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->reset(when);
+    }
+
+    mContext->updateGlobalMetaState();
+
+    notifyReset(when);
+}
+
+void InputDevice::process(const RawEvent* rawEvents, size_t count) {
+    // Process all of the events in order for each mapper.
+    // We cannot simply ask each mapper to process them in bulk because mappers may
+    // have side-effects that must be interleaved.  For example, joystick movement events and
+    // gamepad button presses are handled by different mappers but they should be dispatched
+    // in the order received.
+    size_t numMappers = mMappers.size();
+    for (const RawEvent* rawEvent = rawEvents; count--; rawEvent++) {
+#if DEBUG_RAW_EVENTS
+        ALOGD("Input event: device=%d type=0x%04x code=0x%04x value=0x%08x when=%lld",
+                rawEvent->deviceId, rawEvent->type, rawEvent->code, rawEvent->value,
+                rawEvent->when);
+#endif
+
+        if (mDropUntilNextSync) {
+            if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
+                mDropUntilNextSync = false;
+#if DEBUG_RAW_EVENTS
+                ALOGD("Recovered from input event buffer overrun.");
+#endif
+            } else {
+#if DEBUG_RAW_EVENTS
+                ALOGD("Dropped input event while waiting for next input sync.");
+#endif
+            }
+        } else if (rawEvent->type == EV_SYN && rawEvent->code == SYN_DROPPED) {
+            ALOGI("Detected input event buffer overrun for device %s.", getName().string());
+            mDropUntilNextSync = true;
+            reset(rawEvent->when);
+        } else {
+            for (size_t i = 0; i < numMappers; i++) {
+                InputMapper* mapper = mMappers[i];
+                mapper->process(rawEvent);
+            }
+        }
+    }
+}
+
+void InputDevice::timeoutExpired(nsecs_t when) {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->timeoutExpired(when);
+    }
+}
+
+void InputDevice::getDeviceInfo(InputDeviceInfo* outDeviceInfo) {
+    outDeviceInfo->initialize(mId, mGeneration, mIdentifier, mAlias, mIsExternal);
+
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->populateDeviceInfo(outDeviceInfo);
+    }
+}
+
+int32_t InputDevice::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
+    return getState(sourceMask, keyCode, & InputMapper::getKeyCodeState);
+}
+
+int32_t InputDevice::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
+    return getState(sourceMask, scanCode, & InputMapper::getScanCodeState);
+}
+
+int32_t InputDevice::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
+    return getState(sourceMask, switchCode, & InputMapper::getSwitchState);
+}
+
+int32_t InputDevice::getState(uint32_t sourceMask, int32_t code, GetStateFunc getStateFunc) {
+    int32_t result = AKEY_STATE_UNKNOWN;
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        if (sourcesMatchMask(mapper->getSources(), sourceMask)) {
+            // If any mapper reports AKEY_STATE_DOWN or AKEY_STATE_VIRTUAL, return that
+            // value.  Otherwise, return AKEY_STATE_UP as long as one mapper reports it.
+            int32_t currentResult = (mapper->*getStateFunc)(sourceMask, code);
+            if (currentResult >= AKEY_STATE_DOWN) {
+                return currentResult;
+            } else if (currentResult == AKEY_STATE_UP) {
+                result = currentResult;
+            }
+        }
+    }
+    return result;
+}
+
+bool InputDevice::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+        const int32_t* keyCodes, uint8_t* outFlags) {
+    bool result = false;
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        if (sourcesMatchMask(mapper->getSources(), sourceMask)) {
+            result |= mapper->markSupportedKeyCodes(sourceMask, numCodes, keyCodes, outFlags);
+        }
+    }
+    return result;
+}
+
+void InputDevice::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
+        int32_t token) {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->vibrate(pattern, patternSize, repeat, token);
+    }
+}
+
+void InputDevice::cancelVibrate(int32_t token) {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->cancelVibrate(token);
+    }
+}
+
+int32_t InputDevice::getMetaState() {
+    int32_t result = 0;
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        result |= mapper->getMetaState();
+    }
+    return result;
+}
+
+void InputDevice::fadePointer() {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->fadePointer();
+    }
+}
+
+void InputDevice::bumpGeneration() {
+    mGeneration = mContext->bumpGeneration();
+}
+
+void InputDevice::notifyReset(nsecs_t when) {
+    NotifyDeviceResetArgs args(when, mId);
+    mContext->getListener()->notifyDeviceReset(&args);
+}
+
+
+// --- CursorButtonAccumulator ---
+
+CursorButtonAccumulator::CursorButtonAccumulator() {
+    clearButtons();
+}
+
+void CursorButtonAccumulator::reset(InputDevice* device) {
+    mBtnLeft = device->isKeyPressed(BTN_LEFT);
+    mBtnRight = device->isKeyPressed(BTN_RIGHT);
+    mBtnMiddle = device->isKeyPressed(BTN_MIDDLE);
+    mBtnBack = device->isKeyPressed(BTN_BACK);
+    mBtnSide = device->isKeyPressed(BTN_SIDE);
+    mBtnForward = device->isKeyPressed(BTN_FORWARD);
+    mBtnExtra = device->isKeyPressed(BTN_EXTRA);
+    mBtnTask = device->isKeyPressed(BTN_TASK);
+}
+
+void CursorButtonAccumulator::clearButtons() {
+    mBtnLeft = 0;
+    mBtnRight = 0;
+    mBtnMiddle = 0;
+    mBtnBack = 0;
+    mBtnSide = 0;
+    mBtnForward = 0;
+    mBtnExtra = 0;
+    mBtnTask = 0;
+}
+
+void CursorButtonAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_KEY) {
+        switch (rawEvent->code) {
+        case BTN_LEFT:
+            mBtnLeft = rawEvent->value;
+            break;
+        case BTN_RIGHT:
+            mBtnRight = rawEvent->value;
+            break;
+        case BTN_MIDDLE:
+            mBtnMiddle = rawEvent->value;
+            break;
+        case BTN_BACK:
+            mBtnBack = rawEvent->value;
+            break;
+        case BTN_SIDE:
+            mBtnSide = rawEvent->value;
+            break;
+        case BTN_FORWARD:
+            mBtnForward = rawEvent->value;
+            break;
+        case BTN_EXTRA:
+            mBtnExtra = rawEvent->value;
+            break;
+        case BTN_TASK:
+            mBtnTask = rawEvent->value;
+            break;
+        }
+    }
+}
+
+uint32_t CursorButtonAccumulator::getButtonState() const {
+    uint32_t result = 0;
+    if (mBtnLeft) {
+        result |= AMOTION_EVENT_BUTTON_PRIMARY;
+    }
+    if (mBtnRight) {
+        result |= AMOTION_EVENT_BUTTON_SECONDARY;
+    }
+    if (mBtnMiddle) {
+        result |= AMOTION_EVENT_BUTTON_TERTIARY;
+    }
+    if (mBtnBack || mBtnSide) {
+        result |= AMOTION_EVENT_BUTTON_BACK;
+    }
+    if (mBtnForward || mBtnExtra) {
+        result |= AMOTION_EVENT_BUTTON_FORWARD;
+    }
+    return result;
+}
+
+
+// --- CursorMotionAccumulator ---
+
+CursorMotionAccumulator::CursorMotionAccumulator() {
+    clearRelativeAxes();
+}
+
+void CursorMotionAccumulator::reset(InputDevice* device) {
+    clearRelativeAxes();
+}
+
+void CursorMotionAccumulator::clearRelativeAxes() {
+    mRelX = 0;
+    mRelY = 0;
+}
+
+void CursorMotionAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_REL) {
+        switch (rawEvent->code) {
+        case REL_X:
+            mRelX = rawEvent->value;
+            break;
+        case REL_Y:
+            mRelY = rawEvent->value;
+            break;
+        }
+    }
+}
+
+void CursorMotionAccumulator::finishSync() {
+    clearRelativeAxes();
+}
+
+
+// --- CursorScrollAccumulator ---
+
+CursorScrollAccumulator::CursorScrollAccumulator() :
+        mHaveRelWheel(false), mHaveRelHWheel(false) {
+    clearRelativeAxes();
+}
+
+void CursorScrollAccumulator::configure(InputDevice* device) {
+    mHaveRelWheel = device->getEventHub()->hasRelativeAxis(device->getId(), REL_WHEEL);
+    mHaveRelHWheel = device->getEventHub()->hasRelativeAxis(device->getId(), REL_HWHEEL);
+}
+
+void CursorScrollAccumulator::reset(InputDevice* device) {
+    clearRelativeAxes();
+}
+
+void CursorScrollAccumulator::clearRelativeAxes() {
+    mRelWheel = 0;
+    mRelHWheel = 0;
+}
+
+void CursorScrollAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_REL) {
+        switch (rawEvent->code) {
+        case REL_WHEEL:
+            mRelWheel = rawEvent->value;
+            break;
+        case REL_HWHEEL:
+            mRelHWheel = rawEvent->value;
+            break;
+        }
+    }
+}
+
+void CursorScrollAccumulator::finishSync() {
+    clearRelativeAxes();
+}
+
+
+// --- TouchButtonAccumulator ---
+
+TouchButtonAccumulator::TouchButtonAccumulator() :
+        mHaveBtnTouch(false), mHaveStylus(false) {
+    clearButtons();
+}
+
+void TouchButtonAccumulator::configure(InputDevice* device) {
+    mHaveBtnTouch = device->hasKey(BTN_TOUCH);
+    mHaveStylus = device->hasKey(BTN_TOOL_PEN)
+            || device->hasKey(BTN_TOOL_RUBBER)
+            || device->hasKey(BTN_TOOL_BRUSH)
+            || device->hasKey(BTN_TOOL_PENCIL)
+            || device->hasKey(BTN_TOOL_AIRBRUSH);
+}
+
+void TouchButtonAccumulator::reset(InputDevice* device) {
+    mBtnTouch = device->isKeyPressed(BTN_TOUCH);
+    mBtnStylus = device->isKeyPressed(BTN_STYLUS);
+    mBtnStylus2 = device->isKeyPressed(BTN_STYLUS);
+    mBtnToolFinger = device->isKeyPressed(BTN_TOOL_FINGER);
+    mBtnToolPen = device->isKeyPressed(BTN_TOOL_PEN);
+    mBtnToolRubber = device->isKeyPressed(BTN_TOOL_RUBBER);
+    mBtnToolBrush = device->isKeyPressed(BTN_TOOL_BRUSH);
+    mBtnToolPencil = device->isKeyPressed(BTN_TOOL_PENCIL);
+    mBtnToolAirbrush = device->isKeyPressed(BTN_TOOL_AIRBRUSH);
+    mBtnToolMouse = device->isKeyPressed(BTN_TOOL_MOUSE);
+    mBtnToolLens = device->isKeyPressed(BTN_TOOL_LENS);
+    mBtnToolDoubleTap = device->isKeyPressed(BTN_TOOL_DOUBLETAP);
+    mBtnToolTripleTap = device->isKeyPressed(BTN_TOOL_TRIPLETAP);
+    mBtnToolQuadTap = device->isKeyPressed(BTN_TOOL_QUADTAP);
+}
+
+void TouchButtonAccumulator::clearButtons() {
+    mBtnTouch = 0;
+    mBtnStylus = 0;
+    mBtnStylus2 = 0;
+    mBtnToolFinger = 0;
+    mBtnToolPen = 0;
+    mBtnToolRubber = 0;
+    mBtnToolBrush = 0;
+    mBtnToolPencil = 0;
+    mBtnToolAirbrush = 0;
+    mBtnToolMouse = 0;
+    mBtnToolLens = 0;
+    mBtnToolDoubleTap = 0;
+    mBtnToolTripleTap = 0;
+    mBtnToolQuadTap = 0;
+}
+
+void TouchButtonAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_KEY) {
+        switch (rawEvent->code) {
+        case BTN_TOUCH:
+            mBtnTouch = rawEvent->value;
+            break;
+        case BTN_STYLUS:
+            mBtnStylus = rawEvent->value;
+            break;
+        case BTN_STYLUS2:
+            mBtnStylus2 = rawEvent->value;
+            break;
+        case BTN_TOOL_FINGER:
+            mBtnToolFinger = rawEvent->value;
+            break;
+        case BTN_TOOL_PEN:
+            mBtnToolPen = rawEvent->value;
+            break;
+        case BTN_TOOL_RUBBER:
+            mBtnToolRubber = rawEvent->value;
+            break;
+        case BTN_TOOL_BRUSH:
+            mBtnToolBrush = rawEvent->value;
+            break;
+        case BTN_TOOL_PENCIL:
+            mBtnToolPencil = rawEvent->value;
+            break;
+        case BTN_TOOL_AIRBRUSH:
+            mBtnToolAirbrush = rawEvent->value;
+            break;
+        case BTN_TOOL_MOUSE:
+            mBtnToolMouse = rawEvent->value;
+            break;
+        case BTN_TOOL_LENS:
+            mBtnToolLens = rawEvent->value;
+            break;
+        case BTN_TOOL_DOUBLETAP:
+            mBtnToolDoubleTap = rawEvent->value;
+            break;
+        case BTN_TOOL_TRIPLETAP:
+            mBtnToolTripleTap = rawEvent->value;
+            break;
+        case BTN_TOOL_QUADTAP:
+            mBtnToolQuadTap = rawEvent->value;
+            break;
+        }
+    }
+}
+
+uint32_t TouchButtonAccumulator::getButtonState() const {
+    uint32_t result = 0;
+    if (mBtnStylus) {
+        result |= AMOTION_EVENT_BUTTON_SECONDARY;
+    }
+    if (mBtnStylus2) {
+        result |= AMOTION_EVENT_BUTTON_TERTIARY;
+    }
+    return result;
+}
+
+int32_t TouchButtonAccumulator::getToolType() const {
+    if (mBtnToolMouse || mBtnToolLens) {
+        return AMOTION_EVENT_TOOL_TYPE_MOUSE;
+    }
+    if (mBtnToolRubber) {
+        return AMOTION_EVENT_TOOL_TYPE_ERASER;
+    }
+    if (mBtnToolPen || mBtnToolBrush || mBtnToolPencil || mBtnToolAirbrush) {
+        return AMOTION_EVENT_TOOL_TYPE_STYLUS;
+    }
+    if (mBtnToolFinger || mBtnToolDoubleTap || mBtnToolTripleTap || mBtnToolQuadTap) {
+        return AMOTION_EVENT_TOOL_TYPE_FINGER;
+    }
+    return AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
+}
+
+bool TouchButtonAccumulator::isToolActive() const {
+    return mBtnTouch || mBtnToolFinger || mBtnToolPen || mBtnToolRubber
+            || mBtnToolBrush || mBtnToolPencil || mBtnToolAirbrush
+            || mBtnToolMouse || mBtnToolLens
+            || mBtnToolDoubleTap || mBtnToolTripleTap || mBtnToolQuadTap;
+}
+
+bool TouchButtonAccumulator::isHovering() const {
+    return mHaveBtnTouch && !mBtnTouch;
+}
+
+bool TouchButtonAccumulator::hasStylus() const {
+    return mHaveStylus;
+}
+
+
+// --- RawPointerAxes ---
+
+RawPointerAxes::RawPointerAxes() {
+    clear();
+}
+
+void RawPointerAxes::clear() {
+    x.clear();
+    y.clear();
+    pressure.clear();
+    touchMajor.clear();
+    touchMinor.clear();
+    toolMajor.clear();
+    toolMinor.clear();
+    orientation.clear();
+    distance.clear();
+    tiltX.clear();
+    tiltY.clear();
+    trackingId.clear();
+    slot.clear();
+}
+
+
+// --- RawPointerData ---
+
+RawPointerData::RawPointerData() {
+    clear();
+}
+
+void RawPointerData::clear() {
+    pointerCount = 0;
+    clearIdBits();
+}
+
+void RawPointerData::copyFrom(const RawPointerData& other) {
+    pointerCount = other.pointerCount;
+    hoveringIdBits = other.hoveringIdBits;
+    touchingIdBits = other.touchingIdBits;
+
+    for (uint32_t i = 0; i < pointerCount; i++) {
+        pointers[i] = other.pointers[i];
+
+        int id = pointers[i].id;
+        idToIndex[id] = other.idToIndex[id];
+    }
+}
+
+void RawPointerData::getCentroidOfTouchingPointers(float* outX, float* outY) const {
+    float x = 0, y = 0;
+    uint32_t count = touchingIdBits.count();
+    if (count) {
+        for (BitSet32 idBits(touchingIdBits); !idBits.isEmpty(); ) {
+            uint32_t id = idBits.clearFirstMarkedBit();
+            const Pointer& pointer = pointerForId(id);
+            x += pointer.x;
+            y += pointer.y;
+        }
+        x /= count;
+        y /= count;
+    }
+    *outX = x;
+    *outY = y;
+}
+
+
+// --- CookedPointerData ---
+
+CookedPointerData::CookedPointerData() {
+    clear();
+}
+
+void CookedPointerData::clear() {
+    pointerCount = 0;
+    hoveringIdBits.clear();
+    touchingIdBits.clear();
+}
+
+void CookedPointerData::copyFrom(const CookedPointerData& other) {
+    pointerCount = other.pointerCount;
+    hoveringIdBits = other.hoveringIdBits;
+    touchingIdBits = other.touchingIdBits;
+
+    for (uint32_t i = 0; i < pointerCount; i++) {
+        pointerProperties[i].copyFrom(other.pointerProperties[i]);
+        pointerCoords[i].copyFrom(other.pointerCoords[i]);
+
+        int id = pointerProperties[i].id;
+        idToIndex[id] = other.idToIndex[id];
+    }
+}
+
+
+// --- SingleTouchMotionAccumulator ---
+
+SingleTouchMotionAccumulator::SingleTouchMotionAccumulator() {
+    clearAbsoluteAxes();
+}
+
+void SingleTouchMotionAccumulator::reset(InputDevice* device) {
+    mAbsX = device->getAbsoluteAxisValue(ABS_X);
+    mAbsY = device->getAbsoluteAxisValue(ABS_Y);
+    mAbsPressure = device->getAbsoluteAxisValue(ABS_PRESSURE);
+    mAbsToolWidth = device->getAbsoluteAxisValue(ABS_TOOL_WIDTH);
+    mAbsDistance = device->getAbsoluteAxisValue(ABS_DISTANCE);
+    mAbsTiltX = device->getAbsoluteAxisValue(ABS_TILT_X);
+    mAbsTiltY = device->getAbsoluteAxisValue(ABS_TILT_Y);
+}
+
+void SingleTouchMotionAccumulator::clearAbsoluteAxes() {
+    mAbsX = 0;
+    mAbsY = 0;
+    mAbsPressure = 0;
+    mAbsToolWidth = 0;
+    mAbsDistance = 0;
+    mAbsTiltX = 0;
+    mAbsTiltY = 0;
+}
+
+void SingleTouchMotionAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_ABS) {
+        switch (rawEvent->code) {
+        case ABS_X:
+            mAbsX = rawEvent->value;
+            break;
+        case ABS_Y:
+            mAbsY = rawEvent->value;
+            break;
+        case ABS_PRESSURE:
+            mAbsPressure = rawEvent->value;
+            break;
+        case ABS_TOOL_WIDTH:
+            mAbsToolWidth = rawEvent->value;
+            break;
+        case ABS_DISTANCE:
+            mAbsDistance = rawEvent->value;
+            break;
+        case ABS_TILT_X:
+            mAbsTiltX = rawEvent->value;
+            break;
+        case ABS_TILT_Y:
+            mAbsTiltY = rawEvent->value;
+            break;
+        }
+    }
+}
+
+
+// --- MultiTouchMotionAccumulator ---
+
+MultiTouchMotionAccumulator::MultiTouchMotionAccumulator() :
+        mCurrentSlot(-1), mSlots(NULL), mSlotCount(0), mUsingSlotsProtocol(false),
+        mHaveStylus(false) {
+}
+
+MultiTouchMotionAccumulator::~MultiTouchMotionAccumulator() {
+    delete[] mSlots;
+}
+
+void MultiTouchMotionAccumulator::configure(InputDevice* device,
+        size_t slotCount, bool usingSlotsProtocol) {
+    mSlotCount = slotCount;
+    mUsingSlotsProtocol = usingSlotsProtocol;
+    mHaveStylus = device->hasAbsoluteAxis(ABS_MT_TOOL_TYPE);
+
+    delete[] mSlots;
+    mSlots = new Slot[slotCount];
+}
+
+void MultiTouchMotionAccumulator::reset(InputDevice* device) {
+    // Unfortunately there is no way to read the initial contents of the slots.
+    // So when we reset the accumulator, we must assume they are all zeroes.
+    if (mUsingSlotsProtocol) {
+        // Query the driver for the current slot index and use it as the initial slot
+        // before we start reading events from the device.  It is possible that the
+        // current slot index will not be the same as it was when the first event was
+        // written into the evdev buffer, which means the input mapper could start
+        // out of sync with the initial state of the events in the evdev buffer.
+        // In the extremely unlikely case that this happens, the data from
+        // two slots will be confused until the next ABS_MT_SLOT event is received.
+        // This can cause the touch point to "jump", but at least there will be
+        // no stuck touches.
+        int32_t initialSlot;
+        status_t status = device->getEventHub()->getAbsoluteAxisValue(device->getId(),
+                ABS_MT_SLOT, &initialSlot);
+        if (status) {
+            ALOGD("Could not retrieve current multitouch slot index.  status=%d", status);
+            initialSlot = -1;
+        }
+        clearSlots(initialSlot);
+    } else {
+        clearSlots(-1);
+    }
+}
+
+void MultiTouchMotionAccumulator::clearSlots(int32_t initialSlot) {
+    if (mSlots) {
+        for (size_t i = 0; i < mSlotCount; i++) {
+            mSlots[i].clear();
+        }
+    }
+    mCurrentSlot = initialSlot;
+}
+
+void MultiTouchMotionAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_ABS) {
+#if DEBUG_POINTERS
+        bool newSlot = false;
+#endif
+        if (mUsingSlotsProtocol) {
+            if (rawEvent->code == ABS_MT_SLOT) {
+                mCurrentSlot = rawEvent->value;
+#if DEBUG_POINTERS
+                newSlot = true;
+#endif
+            }
+        } else if (mCurrentSlot < 0) {
+            mCurrentSlot = 0;
+        }
+
+        if (mCurrentSlot < 0 || size_t(mCurrentSlot) >= mSlotCount) {
+#if DEBUG_POINTERS
+            if (newSlot) {
+                ALOGW("MultiTouch device emitted invalid slot index %d but it "
+                        "should be between 0 and %d; ignoring this slot.",
+                        mCurrentSlot, mSlotCount - 1);
+            }
+#endif
+        } else {
+            Slot* slot = &mSlots[mCurrentSlot];
+
+            switch (rawEvent->code) {
+            case ABS_MT_POSITION_X:
+                slot->mInUse = true;
+                slot->mAbsMTPositionX = rawEvent->value;
+                break;
+            case ABS_MT_POSITION_Y:
+                slot->mInUse = true;
+                slot->mAbsMTPositionY = rawEvent->value;
+                break;
+            case ABS_MT_TOUCH_MAJOR:
+                slot->mInUse = true;
+                slot->mAbsMTTouchMajor = rawEvent->value;
+                break;
+            case ABS_MT_TOUCH_MINOR:
+                slot->mInUse = true;
+                slot->mAbsMTTouchMinor = rawEvent->value;
+                slot->mHaveAbsMTTouchMinor = true;
+                break;
+            case ABS_MT_WIDTH_MAJOR:
+                slot->mInUse = true;
+                slot->mAbsMTWidthMajor = rawEvent->value;
+                break;
+            case ABS_MT_WIDTH_MINOR:
+                slot->mInUse = true;
+                slot->mAbsMTWidthMinor = rawEvent->value;
+                slot->mHaveAbsMTWidthMinor = true;
+                break;
+            case ABS_MT_ORIENTATION:
+                slot->mInUse = true;
+                slot->mAbsMTOrientation = rawEvent->value;
+                break;
+            case ABS_MT_TRACKING_ID:
+                if (mUsingSlotsProtocol && rawEvent->value < 0) {
+                    // The slot is no longer in use but it retains its previous contents,
+                    // which may be reused for subsequent touches.
+                    slot->mInUse = false;
+                } else {
+                    slot->mInUse = true;
+                    slot->mAbsMTTrackingId = rawEvent->value;
+                }
+                break;
+            case ABS_MT_PRESSURE:
+                slot->mInUse = true;
+                slot->mAbsMTPressure = rawEvent->value;
+                break;
+            case ABS_MT_DISTANCE:
+                slot->mInUse = true;
+                slot->mAbsMTDistance = rawEvent->value;
+                break;
+            case ABS_MT_TOOL_TYPE:
+                slot->mInUse = true;
+                slot->mAbsMTToolType = rawEvent->value;
+                slot->mHaveAbsMTToolType = true;
+                break;
+            }
+        }
+    } else if (rawEvent->type == EV_SYN && rawEvent->code == SYN_MT_REPORT) {
+        // MultiTouch Sync: The driver has returned all data for *one* of the pointers.
+        mCurrentSlot += 1;
+    }
+}
+
+void MultiTouchMotionAccumulator::finishSync() {
+    if (!mUsingSlotsProtocol) {
+        clearSlots(-1);
+    }
+}
+
+bool MultiTouchMotionAccumulator::hasStylus() const {
+    return mHaveStylus;
+}
+
+
+// --- MultiTouchMotionAccumulator::Slot ---
+
+MultiTouchMotionAccumulator::Slot::Slot() {
+    clear();
+}
+
+void MultiTouchMotionAccumulator::Slot::clear() {
+    mInUse = false;
+    mHaveAbsMTTouchMinor = false;
+    mHaveAbsMTWidthMinor = false;
+    mHaveAbsMTToolType = false;
+    mAbsMTPositionX = 0;
+    mAbsMTPositionY = 0;
+    mAbsMTTouchMajor = 0;
+    mAbsMTTouchMinor = 0;
+    mAbsMTWidthMajor = 0;
+    mAbsMTWidthMinor = 0;
+    mAbsMTOrientation = 0;
+    mAbsMTTrackingId = -1;
+    mAbsMTPressure = 0;
+    mAbsMTDistance = 0;
+    mAbsMTToolType = 0;
+}
+
+int32_t MultiTouchMotionAccumulator::Slot::getToolType() const {
+    if (mHaveAbsMTToolType) {
+        switch (mAbsMTToolType) {
+        case MT_TOOL_FINGER:
+            return AMOTION_EVENT_TOOL_TYPE_FINGER;
+        case MT_TOOL_PEN:
+            return AMOTION_EVENT_TOOL_TYPE_STYLUS;
+        }
+    }
+    return AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
+}
+
+
+// --- InputMapper ---
+
+InputMapper::InputMapper(InputDevice* device) :
+        mDevice(device), mContext(device->getContext()) {
+}
+
+InputMapper::~InputMapper() {
+}
+
+void InputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    info->addSource(getSources());
+}
+
+void InputMapper::dump(String8& dump) {
+}
+
+void InputMapper::configure(nsecs_t when,
+        const InputReaderConfiguration* config, uint32_t changes) {
+}
+
+void InputMapper::reset(nsecs_t when) {
+}
+
+void InputMapper::timeoutExpired(nsecs_t when) {
+}
+
+int32_t InputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
+    return AKEY_STATE_UNKNOWN;
+}
+
+int32_t InputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
+    return AKEY_STATE_UNKNOWN;
+}
+
+int32_t InputMapper::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
+    return AKEY_STATE_UNKNOWN;
+}
+
+bool InputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+        const int32_t* keyCodes, uint8_t* outFlags) {
+    return false;
+}
+
+void InputMapper::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
+        int32_t token) {
+}
+
+void InputMapper::cancelVibrate(int32_t token) {
+}
+
+int32_t InputMapper::getMetaState() {
+    return 0;
+}
+
+void InputMapper::fadePointer() {
+}
+
+status_t InputMapper::getAbsoluteAxisInfo(int32_t axis, RawAbsoluteAxisInfo* axisInfo) {
+    return getEventHub()->getAbsoluteAxisInfo(getDeviceId(), axis, axisInfo);
+}
+
+void InputMapper::bumpGeneration() {
+    mDevice->bumpGeneration();
+}
+
+void InputMapper::dumpRawAbsoluteAxisInfo(String8& dump,
+        const RawAbsoluteAxisInfo& axis, const char* name) {
+    if (axis.valid) {
+        dump.appendFormat(INDENT4 "%s: min=%d, max=%d, flat=%d, fuzz=%d, resolution=%d\n",
+                name, axis.minValue, axis.maxValue, axis.flat, axis.fuzz, axis.resolution);
+    } else {
+        dump.appendFormat(INDENT4 "%s: unknown range\n", name);
+    }
+}
+
+
+// --- SwitchInputMapper ---
+
+SwitchInputMapper::SwitchInputMapper(InputDevice* device) :
+        InputMapper(device), mUpdatedSwitchValues(0), mUpdatedSwitchMask(0) {
+}
+
+SwitchInputMapper::~SwitchInputMapper() {
+}
+
+uint32_t SwitchInputMapper::getSources() {
+    return AINPUT_SOURCE_SWITCH;
+}
+
+void SwitchInputMapper::process(const RawEvent* rawEvent) {
+    switch (rawEvent->type) {
+    case EV_SW:
+        processSwitch(rawEvent->code, rawEvent->value);
+        break;
+
+    case EV_SYN:
+        if (rawEvent->code == SYN_REPORT) {
+            sync(rawEvent->when);
+        }
+    }
+}
+
+void SwitchInputMapper::processSwitch(int32_t switchCode, int32_t switchValue) {
+    if (switchCode >= 0 && switchCode < 32) {
+        if (switchValue) {
+            mUpdatedSwitchValues |= 1 << switchCode;
+        }
+        mUpdatedSwitchMask |= 1 << switchCode;
+    }
+}
+
+void SwitchInputMapper::sync(nsecs_t when) {
+    if (mUpdatedSwitchMask) {
+        NotifySwitchArgs args(when, 0, mUpdatedSwitchValues, mUpdatedSwitchMask);
+        getListener()->notifySwitch(&args);
+
+        mUpdatedSwitchValues = 0;
+        mUpdatedSwitchMask = 0;
+    }
+}
+
+int32_t SwitchInputMapper::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
+    return getEventHub()->getSwitchState(getDeviceId(), switchCode);
+}
+
+
+// --- VibratorInputMapper ---
+
+VibratorInputMapper::VibratorInputMapper(InputDevice* device) :
+        InputMapper(device), mVibrating(false) {
+}
+
+VibratorInputMapper::~VibratorInputMapper() {
+}
+
+uint32_t VibratorInputMapper::getSources() {
+    return 0;
+}
+
+void VibratorInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    info->setVibrator(true);
+}
+
+void VibratorInputMapper::process(const RawEvent* rawEvent) {
+    // TODO: Handle FF_STATUS, although it does not seem to be widely supported.
+}
+
+void VibratorInputMapper::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
+        int32_t token) {
+#if DEBUG_VIBRATOR
+    String8 patternStr;
+    for (size_t i = 0; i < patternSize; i++) {
+        if (i != 0) {
+            patternStr.append(", ");
+        }
+        patternStr.appendFormat("%lld", pattern[i]);
+    }
+    ALOGD("vibrate: deviceId=%d, pattern=[%s], repeat=%ld, token=%d",
+            getDeviceId(), patternStr.string(), repeat, token);
+#endif
+
+    mVibrating = true;
+    memcpy(mPattern, pattern, patternSize * sizeof(nsecs_t));
+    mPatternSize = patternSize;
+    mRepeat = repeat;
+    mToken = token;
+    mIndex = -1;
+
+    nextStep();
+}
+
+void VibratorInputMapper::cancelVibrate(int32_t token) {
+#if DEBUG_VIBRATOR
+    ALOGD("cancelVibrate: deviceId=%d, token=%d", getDeviceId(), token);
+#endif
+
+    if (mVibrating && mToken == token) {
+        stopVibrating();
+    }
+}
+
+void VibratorInputMapper::timeoutExpired(nsecs_t when) {
+    if (mVibrating) {
+        if (when >= mNextStepTime) {
+            nextStep();
+        } else {
+            getContext()->requestTimeoutAtTime(mNextStepTime);
+        }
+    }
+}
+
+void VibratorInputMapper::nextStep() {
+    mIndex += 1;
+    if (size_t(mIndex) >= mPatternSize) {
+        if (mRepeat < 0) {
+            // We are done.
+            stopVibrating();
+            return;
+        }
+        mIndex = mRepeat;
+    }
+
+    bool vibratorOn = mIndex & 1;
+    nsecs_t duration = mPattern[mIndex];
+    if (vibratorOn) {
+#if DEBUG_VIBRATOR
+        ALOGD("nextStep: sending vibrate deviceId=%d, duration=%lld",
+                getDeviceId(), duration);
+#endif
+        getEventHub()->vibrate(getDeviceId(), duration);
+    } else {
+#if DEBUG_VIBRATOR
+        ALOGD("nextStep: sending cancel vibrate deviceId=%d", getDeviceId());
+#endif
+        getEventHub()->cancelVibrate(getDeviceId());
+    }
+    nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
+    mNextStepTime = now + duration;
+    getContext()->requestTimeoutAtTime(mNextStepTime);
+#if DEBUG_VIBRATOR
+    ALOGD("nextStep: scheduled timeout in %0.3fms", duration * 0.000001f);
+#endif
+}
+
+void VibratorInputMapper::stopVibrating() {
+    mVibrating = false;
+#if DEBUG_VIBRATOR
+    ALOGD("stopVibrating: sending cancel vibrate deviceId=%d", getDeviceId());
+#endif
+    getEventHub()->cancelVibrate(getDeviceId());
+}
+
+void VibratorInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Vibrator Input Mapper:\n");
+    dump.appendFormat(INDENT3 "Vibrating: %s\n", toString(mVibrating));
+}
+
+
+// --- KeyboardInputMapper ---
+
+KeyboardInputMapper::KeyboardInputMapper(InputDevice* device,
+        uint32_t source, int32_t keyboardType) :
+        InputMapper(device), mSource(source),
+        mKeyboardType(keyboardType) {
+}
+
+KeyboardInputMapper::~KeyboardInputMapper() {
+}
+
+uint32_t KeyboardInputMapper::getSources() {
+    return mSource;
+}
+
+void KeyboardInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    info->setKeyboardType(mKeyboardType);
+    info->setKeyCharacterMap(getEventHub()->getKeyCharacterMap(getDeviceId()));
+}
+
+void KeyboardInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Keyboard Input Mapper:\n");
+    dumpParameters(dump);
+    dump.appendFormat(INDENT3 "KeyboardType: %d\n", mKeyboardType);
+    dump.appendFormat(INDENT3 "Orientation: %d\n", mOrientation);
+    dump.appendFormat(INDENT3 "KeyDowns: %d keys currently down\n", mKeyDowns.size());
+    dump.appendFormat(INDENT3 "MetaState: 0x%0x\n", mMetaState);
+    dump.appendFormat(INDENT3 "DownTime: %lld\n", mDownTime);
+}
+
+
+void KeyboardInputMapper::configure(nsecs_t when,
+        const InputReaderConfiguration* config, uint32_t changes) {
+    InputMapper::configure(when, config, changes);
+
+    if (!changes) { // first time only
+        // Configure basic parameters.
+        configureParameters();
+    }
+
+    if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {
+        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
+            DisplayViewport v;
+            if (config->getDisplayInfo(false /*external*/, &v)) {
+                mOrientation = v.orientation;
+            } else {
+                mOrientation = DISPLAY_ORIENTATION_0;
+            }
+        } else {
+            mOrientation = DISPLAY_ORIENTATION_0;
+        }
+    }
+}
+
+void KeyboardInputMapper::configureParameters() {
+    mParameters.orientationAware = false;
+    getDevice()->getConfiguration().tryGetProperty(String8("keyboard.orientationAware"),
+            mParameters.orientationAware);
+
+    mParameters.hasAssociatedDisplay = false;
+    if (mParameters.orientationAware) {
+        mParameters.hasAssociatedDisplay = true;
+    }
+}
+
+void KeyboardInputMapper::dumpParameters(String8& dump) {
+    dump.append(INDENT3 "Parameters:\n");
+    dump.appendFormat(INDENT4 "HasAssociatedDisplay: %s\n",
+            toString(mParameters.hasAssociatedDisplay));
+    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
+            toString(mParameters.orientationAware));
+}
+
+void KeyboardInputMapper::reset(nsecs_t when) {
+    mMetaState = AMETA_NONE;
+    mDownTime = 0;
+    mKeyDowns.clear();
+    mCurrentHidUsage = 0;
+
+    resetLedState();
+
+    InputMapper::reset(when);
+}
+
+void KeyboardInputMapper::process(const RawEvent* rawEvent) {
+    switch (rawEvent->type) {
+    case EV_KEY: {
+        int32_t scanCode = rawEvent->code;
+        int32_t usageCode = mCurrentHidUsage;
+        mCurrentHidUsage = 0;
+
+        if (isKeyboardOrGamepadKey(scanCode)) {
+            int32_t keyCode;
+            uint32_t flags;
+            if (getEventHub()->mapKey(getDeviceId(), scanCode, usageCode, &keyCode, &flags)) {
+                keyCode = AKEYCODE_UNKNOWN;
+                flags = 0;
+            }
+            processKey(rawEvent->when, rawEvent->value != 0, keyCode, scanCode, flags);
+        }
+        break;
+    }
+    case EV_MSC: {
+        if (rawEvent->code == MSC_SCAN) {
+            mCurrentHidUsage = rawEvent->value;
+        }
+        break;
+    }
+    case EV_SYN: {
+        if (rawEvent->code == SYN_REPORT) {
+            mCurrentHidUsage = 0;
+        }
+    }
+    }
+}
+
+bool KeyboardInputMapper::isKeyboardOrGamepadKey(int32_t scanCode) {
+    return scanCode < BTN_MOUSE
+        || scanCode >= KEY_OK
+        || (scanCode >= BTN_MISC && scanCode < BTN_MOUSE)
+        || (scanCode >= BTN_JOYSTICK && scanCode < BTN_DIGI);
+}
+
+void KeyboardInputMapper::processKey(nsecs_t when, bool down, int32_t keyCode,
+        int32_t scanCode, uint32_t policyFlags) {
+
+    if (down) {
+        // Rotate key codes according to orientation if needed.
+        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
+            keyCode = rotateKeyCode(keyCode, mOrientation);
+        }
+
+        // Add key down.
+        ssize_t keyDownIndex = findKeyDown(scanCode);
+        if (keyDownIndex >= 0) {
+            // key repeat, be sure to use same keycode as before in case of rotation
+            keyCode = mKeyDowns.itemAt(keyDownIndex).keyCode;
+        } else {
+            // key down
+            if ((policyFlags & POLICY_FLAG_VIRTUAL)
+                    && mContext->shouldDropVirtualKey(when,
+                            getDevice(), keyCode, scanCode)) {
+                return;
+            }
+
+            mKeyDowns.push();
+            KeyDown& keyDown = mKeyDowns.editTop();
+            keyDown.keyCode = keyCode;
+            keyDown.scanCode = scanCode;
+        }
+
+        mDownTime = when;
+    } else {
+        // Remove key down.
+        ssize_t keyDownIndex = findKeyDown(scanCode);
+        if (keyDownIndex >= 0) {
+            // key up, be sure to use same keycode as before in case of rotation
+            keyCode = mKeyDowns.itemAt(keyDownIndex).keyCode;
+            mKeyDowns.removeAt(size_t(keyDownIndex));
+        } else {
+            // key was not actually down
+            ALOGI("Dropping key up from device %s because the key was not down.  "
+                    "keyCode=%d, scanCode=%d",
+                    getDeviceName().string(), keyCode, scanCode);
+            return;
+        }
+    }
+
+    bool metaStateChanged = false;
+    int32_t oldMetaState = mMetaState;
+    int32_t newMetaState = updateMetaState(keyCode, down, oldMetaState);
+    if (oldMetaState != newMetaState) {
+        mMetaState = newMetaState;
+        metaStateChanged = true;
+        updateLedState(false);
+    }
+
+    nsecs_t downTime = mDownTime;
+
+    // Key down on external an keyboard should wake the device.
+    // We don't do this for internal keyboards to prevent them from waking up in your pocket.
+    // For internal keyboards, the key layout file should specify the policy flags for
+    // each wake key individually.
+    // TODO: Use the input device configuration to control this behavior more finely.
+    if (down && getDevice()->isExternal()
+            && !(policyFlags & (POLICY_FLAG_WAKE | POLICY_FLAG_WAKE_DROPPED))) {
+        policyFlags |= POLICY_FLAG_WAKE_DROPPED;
+    }
+
+    if (metaStateChanged) {
+        getContext()->updateGlobalMetaState();
+    }
+
+    if (down && !isMetaKey(keyCode)) {
+        getContext()->fadePointer();
+    }
+
+    NotifyKeyArgs args(when, getDeviceId(), mSource, policyFlags,
+            down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP,
+            AKEY_EVENT_FLAG_FROM_SYSTEM, keyCode, scanCode, newMetaState, downTime);
+    getListener()->notifyKey(&args);
+}
+
+ssize_t KeyboardInputMapper::findKeyDown(int32_t scanCode) {
+    size_t n = mKeyDowns.size();
+    for (size_t i = 0; i < n; i++) {
+        if (mKeyDowns[i].scanCode == scanCode) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+int32_t KeyboardInputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
+    return getEventHub()->getKeyCodeState(getDeviceId(), keyCode);
+}
+
+int32_t KeyboardInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
+    return getEventHub()->getScanCodeState(getDeviceId(), scanCode);
+}
+
+bool KeyboardInputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+        const int32_t* keyCodes, uint8_t* outFlags) {
+    return getEventHub()->markSupportedKeyCodes(getDeviceId(), numCodes, keyCodes, outFlags);
+}
+
+int32_t KeyboardInputMapper::getMetaState() {
+    return mMetaState;
+}
+
+void KeyboardInputMapper::resetLedState() {
+    initializeLedState(mCapsLockLedState, LED_CAPSL);
+    initializeLedState(mNumLockLedState, LED_NUML);
+    initializeLedState(mScrollLockLedState, LED_SCROLLL);
+
+    updateLedState(true);
+}
+
+void KeyboardInputMapper::initializeLedState(LedState& ledState, int32_t led) {
+    ledState.avail = getEventHub()->hasLed(getDeviceId(), led);
+    ledState.on = false;
+}
+
+void KeyboardInputMapper::updateLedState(bool reset) {
+    updateLedStateForModifier(mCapsLockLedState, LED_CAPSL,
+            AMETA_CAPS_LOCK_ON, reset);
+    updateLedStateForModifier(mNumLockLedState, LED_NUML,
+            AMETA_NUM_LOCK_ON, reset);
+    updateLedStateForModifier(mScrollLockLedState, LED_SCROLLL,
+            AMETA_SCROLL_LOCK_ON, reset);
+}
+
+void KeyboardInputMapper::updateLedStateForModifier(LedState& ledState,
+        int32_t led, int32_t modifier, bool reset) {
+    if (ledState.avail) {
+        bool desiredState = (mMetaState & modifier) != 0;
+        if (reset || ledState.on != desiredState) {
+            getEventHub()->setLedState(getDeviceId(), led, desiredState);
+            ledState.on = desiredState;
+        }
+    }
+}
+
+
+// --- CursorInputMapper ---
+
+CursorInputMapper::CursorInputMapper(InputDevice* device) :
+        InputMapper(device) {
+}
+
+CursorInputMapper::~CursorInputMapper() {
+}
+
+uint32_t CursorInputMapper::getSources() {
+    return mSource;
+}
+
+void CursorInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    if (mParameters.mode == Parameters::MODE_POINTER) {
+        float minX, minY, maxX, maxY;
+        if (mPointerController->getBounds(&minX, &minY, &maxX, &maxY)) {
+            info->addMotionRange(AMOTION_EVENT_AXIS_X, mSource, minX, maxX, 0.0f, 0.0f, 0.0f);
+            info->addMotionRange(AMOTION_EVENT_AXIS_Y, mSource, minY, maxY, 0.0f, 0.0f, 0.0f);
+        }
+    } else {
+        info->addMotionRange(AMOTION_EVENT_AXIS_X, mSource, -1.0f, 1.0f, 0.0f, mXScale, 0.0f);
+        info->addMotionRange(AMOTION_EVENT_AXIS_Y, mSource, -1.0f, 1.0f, 0.0f, mYScale, 0.0f);
+    }
+    info->addMotionRange(AMOTION_EVENT_AXIS_PRESSURE, mSource, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f);
+
+    if (mCursorScrollAccumulator.haveRelativeVWheel()) {
+        info->addMotionRange(AMOTION_EVENT_AXIS_VSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
+    }
+    if (mCursorScrollAccumulator.haveRelativeHWheel()) {
+        info->addMotionRange(AMOTION_EVENT_AXIS_HSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
+    }
+}
+
+void CursorInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Cursor Input Mapper:\n");
+    dumpParameters(dump);
+    dump.appendFormat(INDENT3 "XScale: %0.3f\n", mXScale);
+    dump.appendFormat(INDENT3 "YScale: %0.3f\n", mYScale);
+    dump.appendFormat(INDENT3 "XPrecision: %0.3f\n", mXPrecision);
+    dump.appendFormat(INDENT3 "YPrecision: %0.3f\n", mYPrecision);
+    dump.appendFormat(INDENT3 "HaveVWheel: %s\n",
+            toString(mCursorScrollAccumulator.haveRelativeVWheel()));
+    dump.appendFormat(INDENT3 "HaveHWheel: %s\n",
+            toString(mCursorScrollAccumulator.haveRelativeHWheel()));
+    dump.appendFormat(INDENT3 "VWheelScale: %0.3f\n", mVWheelScale);
+    dump.appendFormat(INDENT3 "HWheelScale: %0.3f\n", mHWheelScale);
+    dump.appendFormat(INDENT3 "Orientation: %d\n", mOrientation);
+    dump.appendFormat(INDENT3 "ButtonState: 0x%08x\n", mButtonState);
+    dump.appendFormat(INDENT3 "Down: %s\n", toString(isPointerDown(mButtonState)));
+    dump.appendFormat(INDENT3 "DownTime: %lld\n", mDownTime);
+}
+
+void CursorInputMapper::configure(nsecs_t when,
+        const InputReaderConfiguration* config, uint32_t changes) {
+    InputMapper::configure(when, config, changes);
+
+    if (!changes) { // first time only
+        mCursorScrollAccumulator.configure(getDevice());
+
+        // Configure basic parameters.
+        configureParameters();
+
+        // Configure device mode.
+        switch (mParameters.mode) {
+        case Parameters::MODE_POINTER:
+            mSource = AINPUT_SOURCE_MOUSE;
+            mXPrecision = 1.0f;
+            mYPrecision = 1.0f;
+            mXScale = 1.0f;
+            mYScale = 1.0f;
+            mPointerController = getPolicy()->obtainPointerController(getDeviceId());
+            break;
+        case Parameters::MODE_NAVIGATION:
+            mSource = AINPUT_SOURCE_TRACKBALL;
+            mXPrecision = TRACKBALL_MOVEMENT_THRESHOLD;
+            mYPrecision = TRACKBALL_MOVEMENT_THRESHOLD;
+            mXScale = 1.0f / TRACKBALL_MOVEMENT_THRESHOLD;
+            mYScale = 1.0f / TRACKBALL_MOVEMENT_THRESHOLD;
+            break;
+        }
+
+        mVWheelScale = 1.0f;
+        mHWheelScale = 1.0f;
+    }
+
+    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {
+        mPointerVelocityControl.setParameters(config->pointerVelocityControlParameters);
+        mWheelXVelocityControl.setParameters(config->wheelVelocityControlParameters);
+        mWheelYVelocityControl.setParameters(config->wheelVelocityControlParameters);
+    }
+
+    if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {
+        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
+            DisplayViewport v;
+            if (config->getDisplayInfo(false /*external*/, &v)) {
+                mOrientation = v.orientation;
+            } else {
+                mOrientation = DISPLAY_ORIENTATION_0;
+            }
+        } else {
+            mOrientation = DISPLAY_ORIENTATION_0;
+        }
+        bumpGeneration();
+    }
+}
+
+void CursorInputMapper::configureParameters() {
+    mParameters.mode = Parameters::MODE_POINTER;
+    String8 cursorModeString;
+    if (getDevice()->getConfiguration().tryGetProperty(String8("cursor.mode"), cursorModeString)) {
+        if (cursorModeString == "navigation") {
+            mParameters.mode = Parameters::MODE_NAVIGATION;
+        } else if (cursorModeString != "pointer" && cursorModeString != "default") {
+            ALOGW("Invalid value for cursor.mode: '%s'", cursorModeString.string());
+        }
+    }
+
+    mParameters.orientationAware = false;
+    getDevice()->getConfiguration().tryGetProperty(String8("cursor.orientationAware"),
+            mParameters.orientationAware);
+
+    mParameters.hasAssociatedDisplay = false;
+    if (mParameters.mode == Parameters::MODE_POINTER || mParameters.orientationAware) {
+        mParameters.hasAssociatedDisplay = true;
+    }
+}
+
+void CursorInputMapper::dumpParameters(String8& dump) {
+    dump.append(INDENT3 "Parameters:\n");
+    dump.appendFormat(INDENT4 "HasAssociatedDisplay: %s\n",
+            toString(mParameters.hasAssociatedDisplay));
+
+    switch (mParameters.mode) {
+    case Parameters::MODE_POINTER:
+        dump.append(INDENT4 "Mode: pointer\n");
+        break;
+    case Parameters::MODE_NAVIGATION:
+        dump.append(INDENT4 "Mode: navigation\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
+            toString(mParameters.orientationAware));
+}
+
+void CursorInputMapper::reset(nsecs_t when) {
+    mButtonState = 0;
+    mDownTime = 0;
+
+    mPointerVelocityControl.reset();
+    mWheelXVelocityControl.reset();
+    mWheelYVelocityControl.reset();
+
+    mCursorButtonAccumulator.reset(getDevice());
+    mCursorMotionAccumulator.reset(getDevice());
+    mCursorScrollAccumulator.reset(getDevice());
+
+    InputMapper::reset(when);
+}
+
+void CursorInputMapper::process(const RawEvent* rawEvent) {
+    mCursorButtonAccumulator.process(rawEvent);
+    mCursorMotionAccumulator.process(rawEvent);
+    mCursorScrollAccumulator.process(rawEvent);
+
+    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
+        sync(rawEvent->when);
+    }
+}
+
+void CursorInputMapper::sync(nsecs_t when) {
+    int32_t lastButtonState = mButtonState;
+    int32_t currentButtonState = mCursorButtonAccumulator.getButtonState();
+    mButtonState = currentButtonState;
+
+    bool wasDown = isPointerDown(lastButtonState);
+    bool down = isPointerDown(currentButtonState);
+    bool downChanged;
+    if (!wasDown && down) {
+        mDownTime = when;
+        downChanged = true;
+    } else if (wasDown && !down) {
+        downChanged = true;
+    } else {
+        downChanged = false;
+    }
+    nsecs_t downTime = mDownTime;
+    bool buttonsChanged = currentButtonState != lastButtonState;
+    bool buttonsPressed = currentButtonState & ~lastButtonState;
+
+    float deltaX = mCursorMotionAccumulator.getRelativeX() * mXScale;
+    float deltaY = mCursorMotionAccumulator.getRelativeY() * mYScale;
+    bool moved = deltaX != 0 || deltaY != 0;
+
+    // Rotate delta according to orientation if needed.
+    if (mParameters.orientationAware && mParameters.hasAssociatedDisplay
+            && (deltaX != 0.0f || deltaY != 0.0f)) {
+        rotateDelta(mOrientation, &deltaX, &deltaY);
+    }
+
+    // Move the pointer.
+    PointerProperties pointerProperties;
+    pointerProperties.clear();
+    pointerProperties.id = 0;
+    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_MOUSE;
+
+    PointerCoords pointerCoords;
+    pointerCoords.clear();
+
+    float vscroll = mCursorScrollAccumulator.getRelativeVWheel();
+    float hscroll = mCursorScrollAccumulator.getRelativeHWheel();
+    bool scrolled = vscroll != 0 || hscroll != 0;
+
+    mWheelYVelocityControl.move(when, NULL, &vscroll);
+    mWheelXVelocityControl.move(when, &hscroll, NULL);
+
+    mPointerVelocityControl.move(when, &deltaX, &deltaY);
+
+    int32_t displayId;
+    if (mPointerController != NULL) {
+        if (moved || scrolled || buttonsChanged) {
+            mPointerController->setPresentation(
+                    PointerControllerInterface::PRESENTATION_POINTER);
+
+            if (moved) {
+                mPointerController->move(deltaX, deltaY);
+            }
+
+            if (buttonsChanged) {
+                mPointerController->setButtonState(currentButtonState);
+            }
+
+            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
+        }
+
+        float x, y;
+        mPointerController->getPosition(&x, &y);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        displayId = ADISPLAY_ID_DEFAULT;
+    } else {
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, deltaX);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, deltaY);
+        displayId = ADISPLAY_ID_NONE;
+    }
+
+    pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, down ? 1.0f : 0.0f);
+
+    // Moving an external trackball or mouse should wake the device.
+    // We don't do this for internal cursor devices to prevent them from waking up
+    // the device in your pocket.
+    // TODO: Use the input device configuration to control this behavior more finely.
+    uint32_t policyFlags = 0;
+    if ((buttonsPressed || moved || scrolled) && getDevice()->isExternal()) {
+        policyFlags |= POLICY_FLAG_WAKE_DROPPED;
+    }
+
+    // Synthesize key down from buttons if needed.
+    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
+            policyFlags, lastButtonState, currentButtonState);
+
+    // Send motion event.
+    if (downChanged || moved || scrolled || buttonsChanged) {
+        int32_t metaState = mContext->getGlobalMetaState();
+        int32_t motionEventAction;
+        if (downChanged) {
+            motionEventAction = down ? AMOTION_EVENT_ACTION_DOWN : AMOTION_EVENT_ACTION_UP;
+        } else if (down || mPointerController == NULL) {
+            motionEventAction = AMOTION_EVENT_ACTION_MOVE;
+        } else {
+            motionEventAction = AMOTION_EVENT_ACTION_HOVER_MOVE;
+        }
+
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                motionEventAction, 0, metaState, currentButtonState, 0,
+                displayId, 1, &pointerProperties, &pointerCoords,
+                mXPrecision, mYPrecision, downTime);
+        getListener()->notifyMotion(&args);
+
+        // 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,
+                    metaState, currentButtonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                    displayId, 1, &pointerProperties, &pointerCoords,
+                    mXPrecision, mYPrecision, downTime);
+            getListener()->notifyMotion(&hoverArgs);
+        }
+
+        // Send scroll events.
+        if (scrolled) {
+            pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
+            pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
+
+            NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
+                    AMOTION_EVENT_ACTION_SCROLL, 0, metaState, currentButtonState,
+                    AMOTION_EVENT_EDGE_FLAG_NONE,
+                    displayId, 1, &pointerProperties, &pointerCoords,
+                    mXPrecision, mYPrecision, downTime);
+            getListener()->notifyMotion(&scrollArgs);
+        }
+    }
+
+    // Synthesize key up from buttons if needed.
+    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
+            policyFlags, lastButtonState, currentButtonState);
+
+    mCursorMotionAccumulator.finishSync();
+    mCursorScrollAccumulator.finishSync();
+}
+
+int32_t CursorInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
+    if (scanCode >= BTN_MOUSE && scanCode < BTN_JOYSTICK) {
+        return getEventHub()->getScanCodeState(getDeviceId(), scanCode);
+    } else {
+        return AKEY_STATE_UNKNOWN;
+    }
+}
+
+void CursorInputMapper::fadePointer() {
+    if (mPointerController != NULL) {
+        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+    }
+}
+
+
+// --- TouchInputMapper ---
+
+TouchInputMapper::TouchInputMapper(InputDevice* device) :
+        InputMapper(device),
+        mSource(0), mDeviceMode(DEVICE_MODE_DISABLED),
+        mSurfaceWidth(-1), mSurfaceHeight(-1), mSurfaceLeft(0), mSurfaceTop(0),
+        mSurfaceOrientation(DISPLAY_ORIENTATION_0) {
+}
+
+TouchInputMapper::~TouchInputMapper() {
+}
+
+uint32_t TouchInputMapper::getSources() {
+    return mSource;
+}
+
+void TouchInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    if (mDeviceMode != DEVICE_MODE_DISABLED) {
+        info->addMotionRange(mOrientedRanges.x);
+        info->addMotionRange(mOrientedRanges.y);
+        info->addMotionRange(mOrientedRanges.pressure);
+
+        if (mOrientedRanges.haveSize) {
+            info->addMotionRange(mOrientedRanges.size);
+        }
+
+        if (mOrientedRanges.haveTouchSize) {
+            info->addMotionRange(mOrientedRanges.touchMajor);
+            info->addMotionRange(mOrientedRanges.touchMinor);
+        }
+
+        if (mOrientedRanges.haveToolSize) {
+            info->addMotionRange(mOrientedRanges.toolMajor);
+            info->addMotionRange(mOrientedRanges.toolMinor);
+        }
+
+        if (mOrientedRanges.haveOrientation) {
+            info->addMotionRange(mOrientedRanges.orientation);
+        }
+
+        if (mOrientedRanges.haveDistance) {
+            info->addMotionRange(mOrientedRanges.distance);
+        }
+
+        if (mOrientedRanges.haveTilt) {
+            info->addMotionRange(mOrientedRanges.tilt);
+        }
+
+        if (mCursorScrollAccumulator.haveRelativeVWheel()) {
+            info->addMotionRange(AMOTION_EVENT_AXIS_VSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
+                    0.0f);
+        }
+        if (mCursorScrollAccumulator.haveRelativeHWheel()) {
+            info->addMotionRange(AMOTION_EVENT_AXIS_HSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
+                    0.0f);
+        }
+        if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_BOX) {
+            const InputDeviceInfo::MotionRange& x = mOrientedRanges.x;
+            const InputDeviceInfo::MotionRange& y = mOrientedRanges.y;
+            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_1, mSource, x.min, x.max, x.flat,
+                    x.fuzz, x.resolution);
+            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_2, mSource, y.min, y.max, y.flat,
+                    y.fuzz, y.resolution);
+            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_3, mSource, x.min, x.max, x.flat,
+                    x.fuzz, x.resolution);
+            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_4, mSource, y.min, y.max, y.flat,
+                    y.fuzz, y.resolution);
+        }
+    }
+}
+
+void TouchInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Touch Input Mapper:\n");
+    dumpParameters(dump);
+    dumpVirtualKeys(dump);
+    dumpRawPointerAxes(dump);
+    dumpCalibration(dump);
+    dumpSurface(dump);
+
+    dump.appendFormat(INDENT3 "Translation and Scaling Factors:\n");
+    dump.appendFormat(INDENT4 "XTranslate: %0.3f\n", mXTranslate);
+    dump.appendFormat(INDENT4 "YTranslate: %0.3f\n", mYTranslate);
+    dump.appendFormat(INDENT4 "XScale: %0.3f\n", mXScale);
+    dump.appendFormat(INDENT4 "YScale: %0.3f\n", mYScale);
+    dump.appendFormat(INDENT4 "XPrecision: %0.3f\n", mXPrecision);
+    dump.appendFormat(INDENT4 "YPrecision: %0.3f\n", mYPrecision);
+    dump.appendFormat(INDENT4 "GeometricScale: %0.3f\n", mGeometricScale);
+    dump.appendFormat(INDENT4 "PressureScale: %0.3f\n", mPressureScale);
+    dump.appendFormat(INDENT4 "SizeScale: %0.3f\n", mSizeScale);
+    dump.appendFormat(INDENT4 "OrientationScale: %0.3f\n", mOrientationScale);
+    dump.appendFormat(INDENT4 "DistanceScale: %0.3f\n", mDistanceScale);
+    dump.appendFormat(INDENT4 "HaveTilt: %s\n", toString(mHaveTilt));
+    dump.appendFormat(INDENT4 "TiltXCenter: %0.3f\n", mTiltXCenter);
+    dump.appendFormat(INDENT4 "TiltXScale: %0.3f\n", mTiltXScale);
+    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", mLastButtonState);
+
+    dump.appendFormat(INDENT3 "Last Raw Touch: pointerCount=%d\n",
+            mLastRawPointerData.pointerCount);
+    for (uint32_t i = 0; i < mLastRawPointerData.pointerCount; i++) {
+        const RawPointerData::Pointer& pointer = mLastRawPointerData.pointers[i];
+        dump.appendFormat(INDENT4 "[%d]: id=%d, x=%d, y=%d, pressure=%d, "
+                "touchMajor=%d, touchMinor=%d, toolMajor=%d, toolMinor=%d, "
+                "orientation=%d, tiltX=%d, tiltY=%d, distance=%d, "
+                "toolType=%d, isHovering=%s\n", i,
+                pointer.id, pointer.x, pointer.y, pointer.pressure,
+                pointer.touchMajor, pointer.touchMinor,
+                pointer.toolMajor, pointer.toolMinor,
+                pointer.orientation, pointer.tiltX, pointer.tiltY, pointer.distance,
+                pointer.toolType, toString(pointer.isHovering));
+    }
+
+    dump.appendFormat(INDENT3 "Last Cooked Touch: pointerCount=%d\n",
+            mLastCookedPointerData.pointerCount);
+    for (uint32_t i = 0; i < mLastCookedPointerData.pointerCount; i++) {
+        const PointerProperties& pointerProperties = mLastCookedPointerData.pointerProperties[i];
+        const PointerCoords& pointerCoords = mLastCookedPointerData.pointerCoords[i];
+        dump.appendFormat(INDENT4 "[%d]: id=%d, x=%0.3f, y=%0.3f, pressure=%0.3f, "
+                "touchMajor=%0.3f, touchMinor=%0.3f, toolMajor=%0.3f, toolMinor=%0.3f, "
+                "orientation=%0.3f, tilt=%0.3f, distance=%0.3f, "
+                "toolType=%d, isHovering=%s\n", i,
+                pointerProperties.id,
+                pointerCoords.getX(),
+                pointerCoords.getY(),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TILT),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_DISTANCE),
+                pointerProperties.toolType,
+                toString(mLastCookedPointerData.isHovering(i)));
+    }
+
+    if (mDeviceMode == DEVICE_MODE_POINTER) {
+        dump.appendFormat(INDENT3 "Pointer Gesture Detector:\n");
+        dump.appendFormat(INDENT4 "XMovementScale: %0.3f\n",
+                mPointerXMovementScale);
+        dump.appendFormat(INDENT4 "YMovementScale: %0.3f\n",
+                mPointerYMovementScale);
+        dump.appendFormat(INDENT4 "XZoomScale: %0.3f\n",
+                mPointerXZoomScale);
+        dump.appendFormat(INDENT4 "YZoomScale: %0.3f\n",
+                mPointerYZoomScale);
+        dump.appendFormat(INDENT4 "MaxSwipeWidth: %f\n",
+                mPointerGestureMaxSwipeWidth);
+    }
+}
+
+void TouchInputMapper::configure(nsecs_t when,
+        const InputReaderConfiguration* config, uint32_t changes) {
+    InputMapper::configure(when, config, changes);
+
+    mConfig = *config;
+
+    if (!changes) { // first time only
+        // Configure basic parameters.
+        configureParameters();
+
+        // Configure common accumulators.
+        mCursorScrollAccumulator.configure(getDevice());
+        mTouchButtonAccumulator.configure(getDevice());
+
+        // Configure absolute axis information.
+        configureRawPointerAxes();
+
+        // Prepare input device calibration.
+        parseCalibration();
+        resolveCalibration();
+    }
+
+    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {
+        // Update pointer speed.
+        mPointerVelocityControl.setParameters(mConfig.pointerVelocityControlParameters);
+        mWheelXVelocityControl.setParameters(mConfig.wheelVelocityControlParameters);
+        mWheelYVelocityControl.setParameters(mConfig.wheelVelocityControlParameters);
+    }
+
+    bool resetNeeded = false;
+    if (!changes || (changes & (InputReaderConfiguration::CHANGE_DISPLAY_INFO
+            | InputReaderConfiguration::CHANGE_POINTER_GESTURE_ENABLEMENT
+            | InputReaderConfiguration::CHANGE_SHOW_TOUCHES))) {
+        // Configure device sources, surface dimensions, orientation and
+        // scaling factors.
+        configureSurface(when, &resetNeeded);
+    }
+
+    if (changes && resetNeeded) {
+        // Send reset, unless this is the first time the device has been configured,
+        // in which case the reader will call reset itself after all mappers are ready.
+        getDevice()->notifyReset(when);
+    }
+}
+
+void TouchInputMapper::configureParameters() {
+    // Use the pointer presentation mode for devices that do not support distinct
+    // multitouch.  The spot-based presentation relies on being able to accurately
+    // locate two or more fingers on the touch pad.
+    mParameters.gestureMode = getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_SEMI_MT)
+            ? Parameters::GESTURE_MODE_POINTER : Parameters::GESTURE_MODE_SPOTS;
+
+    String8 gestureModeString;
+    if (getDevice()->getConfiguration().tryGetProperty(String8("touch.gestureMode"),
+            gestureModeString)) {
+        if (gestureModeString == "pointer") {
+            mParameters.gestureMode = Parameters::GESTURE_MODE_POINTER;
+        } else if (gestureModeString == "spots") {
+            mParameters.gestureMode = Parameters::GESTURE_MODE_SPOTS;
+        } else if (gestureModeString != "default") {
+            ALOGW("Invalid value for touch.gestureMode: '%s'", gestureModeString.string());
+        }
+    }
+
+    if (getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_DIRECT)) {
+        // The device is a touch screen.
+        mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_SCREEN;
+    } else if (getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_POINTER)) {
+        // The device is a pointing device like a track pad.
+        mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
+    } else if (getEventHub()->hasRelativeAxis(getDeviceId(), REL_X)
+            || getEventHub()->hasRelativeAxis(getDeviceId(), REL_Y)) {
+        // The device is a cursor device with a touch pad attached.
+        // By default don't use the touch pad to move the pointer.
+        mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_PAD;
+    } else {
+        // The device is a touch pad of unknown purpose.
+        mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
+    }
+
+    String8 deviceTypeString;
+    if (getDevice()->getConfiguration().tryGetProperty(String8("touch.deviceType"),
+            deviceTypeString)) {
+        if (deviceTypeString == "touchScreen") {
+            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_SCREEN;
+        } else if (deviceTypeString == "touchPad") {
+            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_PAD;
+        } else if (deviceTypeString == "touchNavigation") {
+            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_NAVIGATION;
+        } else if (deviceTypeString == "pointer") {
+            mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
+        } else if (deviceTypeString != "default") {
+            ALOGW("Invalid value for touch.deviceType: '%s'", deviceTypeString.string());
+        }
+    }
+
+    mParameters.orientationAware = mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN;
+    getDevice()->getConfiguration().tryGetProperty(String8("touch.orientationAware"),
+            mParameters.orientationAware);
+
+    mParameters.hasAssociatedDisplay = false;
+    mParameters.associatedDisplayIsExternal = false;
+    if (mParameters.orientationAware
+            || mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
+            || mParameters.deviceType == Parameters::DEVICE_TYPE_POINTER) {
+        mParameters.hasAssociatedDisplay = true;
+        mParameters.associatedDisplayIsExternal =
+                mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
+                        && getDevice()->isExternal();
+    }
+}
+
+void TouchInputMapper::dumpParameters(String8& dump) {
+    dump.append(INDENT3 "Parameters:\n");
+
+    switch (mParameters.gestureMode) {
+    case Parameters::GESTURE_MODE_POINTER:
+        dump.append(INDENT4 "GestureMode: pointer\n");
+        break;
+    case Parameters::GESTURE_MODE_SPOTS:
+        dump.append(INDENT4 "GestureMode: spots\n");
+        break;
+    default:
+        assert(false);
+    }
+
+    switch (mParameters.deviceType) {
+    case Parameters::DEVICE_TYPE_TOUCH_SCREEN:
+        dump.append(INDENT4 "DeviceType: touchScreen\n");
+        break;
+    case Parameters::DEVICE_TYPE_TOUCH_PAD:
+        dump.append(INDENT4 "DeviceType: touchPad\n");
+        break;
+    case Parameters::DEVICE_TYPE_TOUCH_NAVIGATION:
+        dump.append(INDENT4 "DeviceType: touchNavigation\n");
+        break;
+    case Parameters::DEVICE_TYPE_POINTER:
+        dump.append(INDENT4 "DeviceType: pointer\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    dump.appendFormat(INDENT4 "AssociatedDisplay: hasAssociatedDisplay=%s, isExternal=%s\n",
+            toString(mParameters.hasAssociatedDisplay),
+            toString(mParameters.associatedDisplayIsExternal));
+    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
+            toString(mParameters.orientationAware));
+}
+
+void TouchInputMapper::configureRawPointerAxes() {
+    mRawPointerAxes.clear();
+}
+
+void TouchInputMapper::dumpRawPointerAxes(String8& dump) {
+    dump.append(INDENT3 "Raw Touch Axes:\n");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.x, "X");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.y, "Y");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.pressure, "Pressure");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.touchMajor, "TouchMajor");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.touchMinor, "TouchMinor");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.toolMajor, "ToolMajor");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.toolMinor, "ToolMinor");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.orientation, "Orientation");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.distance, "Distance");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.tiltX, "TiltX");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.tiltY, "TiltY");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.trackingId, "TrackingId");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.slot, "Slot");
+}
+
+void TouchInputMapper::configureSurface(nsecs_t when, bool* outResetNeeded) {
+    int32_t oldDeviceMode = mDeviceMode;
+
+    // Determine device mode.
+    if (mParameters.deviceType == Parameters::DEVICE_TYPE_POINTER
+            && mConfig.pointerGesturesEnabled) {
+        mSource = AINPUT_SOURCE_MOUSE;
+        mDeviceMode = DEVICE_MODE_POINTER;
+        if (hasStylus()) {
+            mSource |= AINPUT_SOURCE_STYLUS;
+        }
+    } else if (mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
+            && mParameters.hasAssociatedDisplay) {
+        mSource = AINPUT_SOURCE_TOUCHSCREEN;
+        mDeviceMode = DEVICE_MODE_DIRECT;
+        if (hasStylus()) {
+            mSource |= AINPUT_SOURCE_STYLUS;
+        }
+    } else if (mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_NAVIGATION) {
+        mSource = AINPUT_SOURCE_TOUCH_NAVIGATION;
+        mDeviceMode = DEVICE_MODE_NAVIGATION;
+    } else {
+        mSource = AINPUT_SOURCE_TOUCHPAD;
+        mDeviceMode = DEVICE_MODE_UNSCALED;
+    }
+
+    // Ensure we have valid X and Y axes.
+    if (!mRawPointerAxes.x.valid || !mRawPointerAxes.y.valid) {
+        ALOGW(INDENT "Touch device '%s' did not report support for X or Y axis!  "
+                "The device will be inoperable.", getDeviceName().string());
+        mDeviceMode = DEVICE_MODE_DISABLED;
+        return;
+    }
+
+    // Raw width and height in the natural orientation.
+    int32_t rawWidth = mRawPointerAxes.x.maxValue - mRawPointerAxes.x.minValue + 1;
+    int32_t rawHeight = mRawPointerAxes.y.maxValue - mRawPointerAxes.y.minValue + 1;
+
+    // Get associated display dimensions.
+    bool viewportChanged = false;
+    DisplayViewport newViewport;
+    if (mParameters.hasAssociatedDisplay) {
+        if (!mConfig.getDisplayInfo(mParameters.associatedDisplayIsExternal, &newViewport)) {
+            ALOGI(INDENT "Touch device '%s' could not query the properties of its associated "
+                    "display.  The device will be inoperable until the display size "
+                    "becomes available.",
+                    getDeviceName().string());
+            mDeviceMode = DEVICE_MODE_DISABLED;
+            return;
+        }
+    } else {
+        newViewport.setNonDisplayViewport(rawWidth, rawHeight);
+    }
+    if (mViewport != newViewport) {
+        mViewport = newViewport;
+        viewportChanged = true;
+
+        if (mDeviceMode == DEVICE_MODE_DIRECT || mDeviceMode == DEVICE_MODE_POINTER) {
+            // Convert rotated viewport to natural surface coordinates.
+            int32_t naturalLogicalWidth, naturalLogicalHeight;
+            int32_t naturalPhysicalWidth, naturalPhysicalHeight;
+            int32_t naturalPhysicalLeft, naturalPhysicalTop;
+            int32_t naturalDeviceWidth, naturalDeviceHeight;
+            switch (mViewport.orientation) {
+            case DISPLAY_ORIENTATION_90:
+                naturalLogicalWidth = mViewport.logicalBottom - mViewport.logicalTop;
+                naturalLogicalHeight = mViewport.logicalRight - mViewport.logicalLeft;
+                naturalPhysicalWidth = mViewport.physicalBottom - mViewport.physicalTop;
+                naturalPhysicalHeight = mViewport.physicalRight - mViewport.physicalLeft;
+                naturalPhysicalLeft = mViewport.deviceHeight - mViewport.physicalBottom;
+                naturalPhysicalTop = mViewport.physicalLeft;
+                naturalDeviceWidth = mViewport.deviceHeight;
+                naturalDeviceHeight = mViewport.deviceWidth;
+                break;
+            case DISPLAY_ORIENTATION_180:
+                naturalLogicalWidth = mViewport.logicalRight - mViewport.logicalLeft;
+                naturalLogicalHeight = mViewport.logicalBottom - mViewport.logicalTop;
+                naturalPhysicalWidth = mViewport.physicalRight - mViewport.physicalLeft;
+                naturalPhysicalHeight = mViewport.physicalBottom - mViewport.physicalTop;
+                naturalPhysicalLeft = mViewport.deviceWidth - mViewport.physicalRight;
+                naturalPhysicalTop = mViewport.deviceHeight - mViewport.physicalBottom;
+                naturalDeviceWidth = mViewport.deviceWidth;
+                naturalDeviceHeight = mViewport.deviceHeight;
+                break;
+            case DISPLAY_ORIENTATION_270:
+                naturalLogicalWidth = mViewport.logicalBottom - mViewport.logicalTop;
+                naturalLogicalHeight = mViewport.logicalRight - mViewport.logicalLeft;
+                naturalPhysicalWidth = mViewport.physicalBottom - mViewport.physicalTop;
+                naturalPhysicalHeight = mViewport.physicalRight - mViewport.physicalLeft;
+                naturalPhysicalLeft = mViewport.physicalTop;
+                naturalPhysicalTop = mViewport.deviceWidth - mViewport.physicalRight;
+                naturalDeviceWidth = mViewport.deviceHeight;
+                naturalDeviceHeight = mViewport.deviceWidth;
+                break;
+            case DISPLAY_ORIENTATION_0:
+            default:
+                naturalLogicalWidth = mViewport.logicalRight - mViewport.logicalLeft;
+                naturalLogicalHeight = mViewport.logicalBottom - mViewport.logicalTop;
+                naturalPhysicalWidth = mViewport.physicalRight - mViewport.physicalLeft;
+                naturalPhysicalHeight = mViewport.physicalBottom - mViewport.physicalTop;
+                naturalPhysicalLeft = mViewport.physicalLeft;
+                naturalPhysicalTop = mViewport.physicalTop;
+                naturalDeviceWidth = mViewport.deviceWidth;
+                naturalDeviceHeight = mViewport.deviceHeight;
+                break;
+            }
+
+            mSurfaceWidth = naturalLogicalWidth * naturalDeviceWidth / naturalPhysicalWidth;
+            mSurfaceHeight = naturalLogicalHeight * naturalDeviceHeight / naturalPhysicalHeight;
+            mSurfaceLeft = naturalPhysicalLeft * naturalLogicalWidth / naturalPhysicalWidth;
+            mSurfaceTop = naturalPhysicalTop * naturalLogicalHeight / naturalPhysicalHeight;
+
+            mSurfaceOrientation = mParameters.orientationAware ?
+                    mViewport.orientation : DISPLAY_ORIENTATION_0;
+        } else {
+            mSurfaceWidth = rawWidth;
+            mSurfaceHeight = rawHeight;
+            mSurfaceLeft = 0;
+            mSurfaceTop = 0;
+            mSurfaceOrientation = DISPLAY_ORIENTATION_0;
+        }
+    }
+
+    // If moving between pointer modes, need to reset some state.
+    bool deviceModeChanged = mDeviceMode != oldDeviceMode;
+    if (deviceModeChanged) {
+        mOrientedRanges.clear();
+    }
+
+    // Create pointer controller if needed.
+    if (mDeviceMode == DEVICE_MODE_POINTER ||
+            (mDeviceMode == DEVICE_MODE_DIRECT && mConfig.showTouches)) {
+        if (mPointerController == NULL) {
+            mPointerController = getPolicy()->obtainPointerController(getDeviceId());
+        }
+    } else {
+        mPointerController.clear();
+    }
+
+    if (viewportChanged || deviceModeChanged) {
+        ALOGI("Device reconfigured: id=%d, name='%s', size %dx%d, orientation %d, mode %d, "
+                "display id %d",
+                getDeviceId(), getDeviceName().string(), mSurfaceWidth, mSurfaceHeight,
+                mSurfaceOrientation, mDeviceMode, mViewport.displayId);
+
+        // Configure X and Y factors.
+        mXScale = float(mSurfaceWidth) / rawWidth;
+        mYScale = float(mSurfaceHeight) / rawHeight;
+        mXTranslate = -mSurfaceLeft;
+        mYTranslate = -mSurfaceTop;
+        mXPrecision = 1.0f / mXScale;
+        mYPrecision = 1.0f / mYScale;
+
+        mOrientedRanges.x.axis = AMOTION_EVENT_AXIS_X;
+        mOrientedRanges.x.source = mSource;
+        mOrientedRanges.y.axis = AMOTION_EVENT_AXIS_Y;
+        mOrientedRanges.y.source = mSource;
+
+        configureVirtualKeys();
+
+        // Scale factor for terms that are not oriented in a particular axis.
+        // If the pixels are square then xScale == yScale otherwise we fake it
+        // by choosing an average.
+        mGeometricScale = avg(mXScale, mYScale);
+
+        // Size of diagonal axis.
+        float diagonalSize = hypotf(mSurfaceWidth, mSurfaceHeight);
+
+        // Size factors.
+        if (mCalibration.sizeCalibration != Calibration::SIZE_CALIBRATION_NONE) {
+            if (mRawPointerAxes.touchMajor.valid
+                    && mRawPointerAxes.touchMajor.maxValue != 0) {
+                mSizeScale = 1.0f / mRawPointerAxes.touchMajor.maxValue;
+            } else if (mRawPointerAxes.toolMajor.valid
+                    && mRawPointerAxes.toolMajor.maxValue != 0) {
+                mSizeScale = 1.0f / mRawPointerAxes.toolMajor.maxValue;
+            } else {
+                mSizeScale = 0.0f;
+            }
+
+            mOrientedRanges.haveTouchSize = true;
+            mOrientedRanges.haveToolSize = true;
+            mOrientedRanges.haveSize = true;
+
+            mOrientedRanges.touchMajor.axis = AMOTION_EVENT_AXIS_TOUCH_MAJOR;
+            mOrientedRanges.touchMajor.source = mSource;
+            mOrientedRanges.touchMajor.min = 0;
+            mOrientedRanges.touchMajor.max = diagonalSize;
+            mOrientedRanges.touchMajor.flat = 0;
+            mOrientedRanges.touchMajor.fuzz = 0;
+            mOrientedRanges.touchMajor.resolution = 0;
+
+            mOrientedRanges.touchMinor = mOrientedRanges.touchMajor;
+            mOrientedRanges.touchMinor.axis = AMOTION_EVENT_AXIS_TOUCH_MINOR;
+
+            mOrientedRanges.toolMajor.axis = AMOTION_EVENT_AXIS_TOOL_MAJOR;
+            mOrientedRanges.toolMajor.source = mSource;
+            mOrientedRanges.toolMajor.min = 0;
+            mOrientedRanges.toolMajor.max = diagonalSize;
+            mOrientedRanges.toolMajor.flat = 0;
+            mOrientedRanges.toolMajor.fuzz = 0;
+            mOrientedRanges.toolMajor.resolution = 0;
+
+            mOrientedRanges.toolMinor = mOrientedRanges.toolMajor;
+            mOrientedRanges.toolMinor.axis = AMOTION_EVENT_AXIS_TOOL_MINOR;
+
+            mOrientedRanges.size.axis = AMOTION_EVENT_AXIS_SIZE;
+            mOrientedRanges.size.source = mSource;
+            mOrientedRanges.size.min = 0;
+            mOrientedRanges.size.max = 1.0;
+            mOrientedRanges.size.flat = 0;
+            mOrientedRanges.size.fuzz = 0;
+            mOrientedRanges.size.resolution = 0;
+        } else {
+            mSizeScale = 0.0f;
+        }
+
+        // Pressure factors.
+        mPressureScale = 0;
+        if (mCalibration.pressureCalibration == Calibration::PRESSURE_CALIBRATION_PHYSICAL
+                || mCalibration.pressureCalibration
+                        == Calibration::PRESSURE_CALIBRATION_AMPLITUDE) {
+            if (mCalibration.havePressureScale) {
+                mPressureScale = mCalibration.pressureScale;
+            } else if (mRawPointerAxes.pressure.valid
+                    && mRawPointerAxes.pressure.maxValue != 0) {
+                mPressureScale = 1.0f / mRawPointerAxes.pressure.maxValue;
+            }
+        }
+
+        mOrientedRanges.pressure.axis = AMOTION_EVENT_AXIS_PRESSURE;
+        mOrientedRanges.pressure.source = mSource;
+        mOrientedRanges.pressure.min = 0;
+        mOrientedRanges.pressure.max = 1.0;
+        mOrientedRanges.pressure.flat = 0;
+        mOrientedRanges.pressure.fuzz = 0;
+        mOrientedRanges.pressure.resolution = 0;
+
+        // Tilt
+        mTiltXCenter = 0;
+        mTiltXScale = 0;
+        mTiltYCenter = 0;
+        mTiltYScale = 0;
+        mHaveTilt = mRawPointerAxes.tiltX.valid && mRawPointerAxes.tiltY.valid;
+        if (mHaveTilt) {
+            mTiltXCenter = avg(mRawPointerAxes.tiltX.minValue,
+                    mRawPointerAxes.tiltX.maxValue);
+            mTiltYCenter = avg(mRawPointerAxes.tiltY.minValue,
+                    mRawPointerAxes.tiltY.maxValue);
+            mTiltXScale = M_PI / 180;
+            mTiltYScale = M_PI / 180;
+
+            mOrientedRanges.haveTilt = true;
+
+            mOrientedRanges.tilt.axis = AMOTION_EVENT_AXIS_TILT;
+            mOrientedRanges.tilt.source = mSource;
+            mOrientedRanges.tilt.min = 0;
+            mOrientedRanges.tilt.max = M_PI_2;
+            mOrientedRanges.tilt.flat = 0;
+            mOrientedRanges.tilt.fuzz = 0;
+            mOrientedRanges.tilt.resolution = 0;
+        }
+
+        // Orientation
+        mOrientationScale = 0;
+        if (mHaveTilt) {
+            mOrientedRanges.haveOrientation = true;
+
+            mOrientedRanges.orientation.axis = AMOTION_EVENT_AXIS_ORIENTATION;
+            mOrientedRanges.orientation.source = mSource;
+            mOrientedRanges.orientation.min = -M_PI;
+            mOrientedRanges.orientation.max = M_PI;
+            mOrientedRanges.orientation.flat = 0;
+            mOrientedRanges.orientation.fuzz = 0;
+            mOrientedRanges.orientation.resolution = 0;
+        } else if (mCalibration.orientationCalibration !=
+                Calibration::ORIENTATION_CALIBRATION_NONE) {
+            if (mCalibration.orientationCalibration
+                    == Calibration::ORIENTATION_CALIBRATION_INTERPOLATED) {
+                if (mRawPointerAxes.orientation.valid) {
+                    if (mRawPointerAxes.orientation.maxValue > 0) {
+                        mOrientationScale = M_PI_2 / mRawPointerAxes.orientation.maxValue;
+                    } else if (mRawPointerAxes.orientation.minValue < 0) {
+                        mOrientationScale = -M_PI_2 / mRawPointerAxes.orientation.minValue;
+                    } else {
+                        mOrientationScale = 0;
+                    }
+                }
+            }
+
+            mOrientedRanges.haveOrientation = true;
+
+            mOrientedRanges.orientation.axis = AMOTION_EVENT_AXIS_ORIENTATION;
+            mOrientedRanges.orientation.source = mSource;
+            mOrientedRanges.orientation.min = -M_PI_2;
+            mOrientedRanges.orientation.max = M_PI_2;
+            mOrientedRanges.orientation.flat = 0;
+            mOrientedRanges.orientation.fuzz = 0;
+            mOrientedRanges.orientation.resolution = 0;
+        }
+
+        // Distance
+        mDistanceScale = 0;
+        if (mCalibration.distanceCalibration != Calibration::DISTANCE_CALIBRATION_NONE) {
+            if (mCalibration.distanceCalibration
+                    == Calibration::DISTANCE_CALIBRATION_SCALED) {
+                if (mCalibration.haveDistanceScale) {
+                    mDistanceScale = mCalibration.distanceScale;
+                } else {
+                    mDistanceScale = 1.0f;
+                }
+            }
+
+            mOrientedRanges.haveDistance = true;
+
+            mOrientedRanges.distance.axis = AMOTION_EVENT_AXIS_DISTANCE;
+            mOrientedRanges.distance.source = mSource;
+            mOrientedRanges.distance.min =
+                    mRawPointerAxes.distance.minValue * mDistanceScale;
+            mOrientedRanges.distance.max =
+                    mRawPointerAxes.distance.maxValue * mDistanceScale;
+            mOrientedRanges.distance.flat = 0;
+            mOrientedRanges.distance.fuzz =
+                    mRawPointerAxes.distance.fuzz * mDistanceScale;
+            mOrientedRanges.distance.resolution = 0;
+        }
+
+        // Compute oriented precision, scales and ranges.
+        // Note that the maximum value reported is an inclusive maximum value so it is one
+        // unit less than the total width or height of surface.
+        switch (mSurfaceOrientation) {
+        case DISPLAY_ORIENTATION_90:
+        case DISPLAY_ORIENTATION_270:
+            mOrientedXPrecision = mYPrecision;
+            mOrientedYPrecision = mXPrecision;
+
+            mOrientedRanges.x.min = mYTranslate;
+            mOrientedRanges.x.max = mSurfaceHeight + mYTranslate - 1;
+            mOrientedRanges.x.flat = 0;
+            mOrientedRanges.x.fuzz = 0;
+            mOrientedRanges.x.resolution = mRawPointerAxes.y.resolution * mYScale;
+
+            mOrientedRanges.y.min = mXTranslate;
+            mOrientedRanges.y.max = mSurfaceWidth + mXTranslate - 1;
+            mOrientedRanges.y.flat = 0;
+            mOrientedRanges.y.fuzz = 0;
+            mOrientedRanges.y.resolution = mRawPointerAxes.x.resolution * mXScale;
+            break;
+
+        default:
+            mOrientedXPrecision = mXPrecision;
+            mOrientedYPrecision = mYPrecision;
+
+            mOrientedRanges.x.min = mXTranslate;
+            mOrientedRanges.x.max = mSurfaceWidth + mXTranslate - 1;
+            mOrientedRanges.x.flat = 0;
+            mOrientedRanges.x.fuzz = 0;
+            mOrientedRanges.x.resolution = mRawPointerAxes.x.resolution * mXScale;
+
+            mOrientedRanges.y.min = mYTranslate;
+            mOrientedRanges.y.max = mSurfaceHeight + mYTranslate - 1;
+            mOrientedRanges.y.flat = 0;
+            mOrientedRanges.y.fuzz = 0;
+            mOrientedRanges.y.resolution = mRawPointerAxes.y.resolution * mYScale;
+            break;
+        }
+
+        if (mDeviceMode == DEVICE_MODE_POINTER) {
+            // Compute pointer gesture detection parameters.
+            float rawDiagonal = hypotf(rawWidth, rawHeight);
+            float displayDiagonal = hypotf(mSurfaceWidth, mSurfaceHeight);
+
+            // Scale movements such that one whole swipe of the touch pad covers a
+            // given area relative to the diagonal size of the display when no acceleration
+            // is applied.
+            // Assume that the touch pad has a square aspect ratio such that movements in
+            // X and Y of the same number of raw units cover the same physical distance.
+            mPointerXMovementScale = mConfig.pointerGestureMovementSpeedRatio
+                    * displayDiagonal / rawDiagonal;
+            mPointerYMovementScale = mPointerXMovementScale;
+
+            // Scale zooms to cover a smaller range of the display than movements do.
+            // This value determines the area around the pointer that is affected by freeform
+            // pointer gestures.
+            mPointerXZoomScale = mConfig.pointerGestureZoomSpeedRatio
+                    * displayDiagonal / rawDiagonal;
+            mPointerYZoomScale = mPointerXZoomScale;
+
+            // Max width between pointers to detect a swipe gesture is more than some fraction
+            // of the diagonal axis of the touch pad.  Touches that are wider than this are
+            // translated into freeform gestures.
+            mPointerGestureMaxSwipeWidth =
+                    mConfig.pointerGestureSwipeMaxWidthRatio * rawDiagonal;
+
+            // Abort current pointer usages because the state has changed.
+            abortPointerUsage(when, 0 /*policyFlags*/);
+        }
+
+        // Inform the dispatcher about the changes.
+        *outResetNeeded = true;
+        bumpGeneration();
+    }
+}
+
+void TouchInputMapper::dumpSurface(String8& dump) {
+    dump.appendFormat(INDENT3 "Viewport: displayId=%d, orientation=%d, "
+            "logicalFrame=[%d, %d, %d, %d], "
+            "physicalFrame=[%d, %d, %d, %d], "
+            "deviceSize=[%d, %d]\n",
+            mViewport.displayId, mViewport.orientation,
+            mViewport.logicalLeft, mViewport.logicalTop,
+            mViewport.logicalRight, mViewport.logicalBottom,
+            mViewport.physicalLeft, mViewport.physicalTop,
+            mViewport.physicalRight, mViewport.physicalBottom,
+            mViewport.deviceWidth, mViewport.deviceHeight);
+
+    dump.appendFormat(INDENT3 "SurfaceWidth: %dpx\n", mSurfaceWidth);
+    dump.appendFormat(INDENT3 "SurfaceHeight: %dpx\n", mSurfaceHeight);
+    dump.appendFormat(INDENT3 "SurfaceLeft: %d\n", mSurfaceLeft);
+    dump.appendFormat(INDENT3 "SurfaceTop: %d\n", mSurfaceTop);
+    dump.appendFormat(INDENT3 "SurfaceOrientation: %d\n", mSurfaceOrientation);
+}
+
+void TouchInputMapper::configureVirtualKeys() {
+    Vector<VirtualKeyDefinition> virtualKeyDefinitions;
+    getEventHub()->getVirtualKeyDefinitions(getDeviceId(), virtualKeyDefinitions);
+
+    mVirtualKeys.clear();
+
+    if (virtualKeyDefinitions.size() == 0) {
+        return;
+    }
+
+    mVirtualKeys.setCapacity(virtualKeyDefinitions.size());
+
+    int32_t touchScreenLeft = mRawPointerAxes.x.minValue;
+    int32_t touchScreenTop = mRawPointerAxes.y.minValue;
+    int32_t touchScreenWidth = mRawPointerAxes.x.maxValue - mRawPointerAxes.x.minValue + 1;
+    int32_t touchScreenHeight = mRawPointerAxes.y.maxValue - mRawPointerAxes.y.minValue + 1;
+
+    for (size_t i = 0; i < virtualKeyDefinitions.size(); i++) {
+        const VirtualKeyDefinition& virtualKeyDefinition =
+                virtualKeyDefinitions[i];
+
+        mVirtualKeys.add();
+        VirtualKey& virtualKey = mVirtualKeys.editTop();
+
+        virtualKey.scanCode = virtualKeyDefinition.scanCode;
+        int32_t keyCode;
+        uint32_t flags;
+        if (getEventHub()->mapKey(getDeviceId(), virtualKey.scanCode, 0, &keyCode, &flags)) {
+            ALOGW(INDENT "VirtualKey %d: could not obtain key code, ignoring",
+                    virtualKey.scanCode);
+            mVirtualKeys.pop(); // drop the key
+            continue;
+        }
+
+        virtualKey.keyCode = keyCode;
+        virtualKey.flags = flags;
+
+        // convert the key definition's display coordinates into touch coordinates for a hit box
+        int32_t halfWidth = virtualKeyDefinition.width / 2;
+        int32_t halfHeight = virtualKeyDefinition.height / 2;
+
+        virtualKey.hitLeft = (virtualKeyDefinition.centerX - halfWidth)
+                * touchScreenWidth / mSurfaceWidth + touchScreenLeft;
+        virtualKey.hitRight= (virtualKeyDefinition.centerX + halfWidth)
+                * touchScreenWidth / mSurfaceWidth + touchScreenLeft;
+        virtualKey.hitTop = (virtualKeyDefinition.centerY - halfHeight)
+                * touchScreenHeight / mSurfaceHeight + touchScreenTop;
+        virtualKey.hitBottom = (virtualKeyDefinition.centerY + halfHeight)
+                * touchScreenHeight / mSurfaceHeight + touchScreenTop;
+    }
+}
+
+void TouchInputMapper::dumpVirtualKeys(String8& dump) {
+    if (!mVirtualKeys.isEmpty()) {
+        dump.append(INDENT3 "Virtual Keys:\n");
+
+        for (size_t i = 0; i < mVirtualKeys.size(); i++) {
+            const VirtualKey& virtualKey = mVirtualKeys.itemAt(i);
+            dump.appendFormat(INDENT4 "%d: scanCode=%d, keyCode=%d, "
+                    "hitLeft=%d, hitRight=%d, hitTop=%d, hitBottom=%d\n",
+                    i, virtualKey.scanCode, virtualKey.keyCode,
+                    virtualKey.hitLeft, virtualKey.hitRight,
+                    virtualKey.hitTop, virtualKey.hitBottom);
+        }
+    }
+}
+
+void TouchInputMapper::parseCalibration() {
+    const PropertyMap& in = getDevice()->getConfiguration();
+    Calibration& out = mCalibration;
+
+    // Size
+    out.sizeCalibration = Calibration::SIZE_CALIBRATION_DEFAULT;
+    String8 sizeCalibrationString;
+    if (in.tryGetProperty(String8("touch.size.calibration"), sizeCalibrationString)) {
+        if (sizeCalibrationString == "none") {
+            out.sizeCalibration = Calibration::SIZE_CALIBRATION_NONE;
+        } else if (sizeCalibrationString == "geometric") {
+            out.sizeCalibration = Calibration::SIZE_CALIBRATION_GEOMETRIC;
+        } else if (sizeCalibrationString == "diameter") {
+            out.sizeCalibration = Calibration::SIZE_CALIBRATION_DIAMETER;
+        } else if (sizeCalibrationString == "box") {
+            out.sizeCalibration = Calibration::SIZE_CALIBRATION_BOX;
+        } else if (sizeCalibrationString == "area") {
+            out.sizeCalibration = Calibration::SIZE_CALIBRATION_AREA;
+        } else if (sizeCalibrationString != "default") {
+            ALOGW("Invalid value for touch.size.calibration: '%s'",
+                    sizeCalibrationString.string());
+        }
+    }
+
+    out.haveSizeScale = in.tryGetProperty(String8("touch.size.scale"),
+            out.sizeScale);
+    out.haveSizeBias = in.tryGetProperty(String8("touch.size.bias"),
+            out.sizeBias);
+    out.haveSizeIsSummed = in.tryGetProperty(String8("touch.size.isSummed"),
+            out.sizeIsSummed);
+
+    // Pressure
+    out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_DEFAULT;
+    String8 pressureCalibrationString;
+    if (in.tryGetProperty(String8("touch.pressure.calibration"), pressureCalibrationString)) {
+        if (pressureCalibrationString == "none") {
+            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_NONE;
+        } else if (pressureCalibrationString == "physical") {
+            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_PHYSICAL;
+        } else if (pressureCalibrationString == "amplitude") {
+            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_AMPLITUDE;
+        } else if (pressureCalibrationString != "default") {
+            ALOGW("Invalid value for touch.pressure.calibration: '%s'",
+                    pressureCalibrationString.string());
+        }
+    }
+
+    out.havePressureScale = in.tryGetProperty(String8("touch.pressure.scale"),
+            out.pressureScale);
+
+    // Orientation
+    out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_DEFAULT;
+    String8 orientationCalibrationString;
+    if (in.tryGetProperty(String8("touch.orientation.calibration"), orientationCalibrationString)) {
+        if (orientationCalibrationString == "none") {
+            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
+        } else if (orientationCalibrationString == "interpolated") {
+            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
+        } else if (orientationCalibrationString == "vector") {
+            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_VECTOR;
+        } else if (orientationCalibrationString != "default") {
+            ALOGW("Invalid value for touch.orientation.calibration: '%s'",
+                    orientationCalibrationString.string());
+        }
+    }
+
+    // Distance
+    out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_DEFAULT;
+    String8 distanceCalibrationString;
+    if (in.tryGetProperty(String8("touch.distance.calibration"), distanceCalibrationString)) {
+        if (distanceCalibrationString == "none") {
+            out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_NONE;
+        } else if (distanceCalibrationString == "scaled") {
+            out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_SCALED;
+        } else if (distanceCalibrationString != "default") {
+            ALOGW("Invalid value for touch.distance.calibration: '%s'",
+                    distanceCalibrationString.string());
+        }
+    }
+
+    out.haveDistanceScale = in.tryGetProperty(String8("touch.distance.scale"),
+            out.distanceScale);
+
+    out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_DEFAULT;
+    String8 coverageCalibrationString;
+    if (in.tryGetProperty(String8("touch.coverage.calibration"), coverageCalibrationString)) {
+        if (coverageCalibrationString == "none") {
+            out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_NONE;
+        } else if (coverageCalibrationString == "box") {
+            out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_BOX;
+        } else if (coverageCalibrationString != "default") {
+            ALOGW("Invalid value for touch.coverage.calibration: '%s'",
+                    coverageCalibrationString.string());
+        }
+    }
+}
+
+void TouchInputMapper::resolveCalibration() {
+    // Size
+    if (mRawPointerAxes.touchMajor.valid || mRawPointerAxes.toolMajor.valid) {
+        if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_DEFAULT) {
+            mCalibration.sizeCalibration = Calibration::SIZE_CALIBRATION_GEOMETRIC;
+        }
+    } else {
+        mCalibration.sizeCalibration = Calibration::SIZE_CALIBRATION_NONE;
+    }
+
+    // Pressure
+    if (mRawPointerAxes.pressure.valid) {
+        if (mCalibration.pressureCalibration == Calibration::PRESSURE_CALIBRATION_DEFAULT) {
+            mCalibration.pressureCalibration = Calibration::PRESSURE_CALIBRATION_PHYSICAL;
+        }
+    } else {
+        mCalibration.pressureCalibration = Calibration::PRESSURE_CALIBRATION_NONE;
+    }
+
+    // Orientation
+    if (mRawPointerAxes.orientation.valid) {
+        if (mCalibration.orientationCalibration == Calibration::ORIENTATION_CALIBRATION_DEFAULT) {
+            mCalibration.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
+        }
+    } else {
+        mCalibration.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
+    }
+
+    // Distance
+    if (mRawPointerAxes.distance.valid) {
+        if (mCalibration.distanceCalibration == Calibration::DISTANCE_CALIBRATION_DEFAULT) {
+            mCalibration.distanceCalibration = Calibration::DISTANCE_CALIBRATION_SCALED;
+        }
+    } else {
+        mCalibration.distanceCalibration = Calibration::DISTANCE_CALIBRATION_NONE;
+    }
+
+    // Coverage
+    if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_DEFAULT) {
+        mCalibration.coverageCalibration = Calibration::COVERAGE_CALIBRATION_NONE;
+    }
+}
+
+void TouchInputMapper::dumpCalibration(String8& dump) {
+    dump.append(INDENT3 "Calibration:\n");
+
+    // Size
+    switch (mCalibration.sizeCalibration) {
+    case Calibration::SIZE_CALIBRATION_NONE:
+        dump.append(INDENT4 "touch.size.calibration: none\n");
+        break;
+    case Calibration::SIZE_CALIBRATION_GEOMETRIC:
+        dump.append(INDENT4 "touch.size.calibration: geometric\n");
+        break;
+    case Calibration::SIZE_CALIBRATION_DIAMETER:
+        dump.append(INDENT4 "touch.size.calibration: diameter\n");
+        break;
+    case Calibration::SIZE_CALIBRATION_BOX:
+        dump.append(INDENT4 "touch.size.calibration: box\n");
+        break;
+    case Calibration::SIZE_CALIBRATION_AREA:
+        dump.append(INDENT4 "touch.size.calibration: area\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    if (mCalibration.haveSizeScale) {
+        dump.appendFormat(INDENT4 "touch.size.scale: %0.3f\n",
+                mCalibration.sizeScale);
+    }
+
+    if (mCalibration.haveSizeBias) {
+        dump.appendFormat(INDENT4 "touch.size.bias: %0.3f\n",
+                mCalibration.sizeBias);
+    }
+
+    if (mCalibration.haveSizeIsSummed) {
+        dump.appendFormat(INDENT4 "touch.size.isSummed: %s\n",
+                toString(mCalibration.sizeIsSummed));
+    }
+
+    // Pressure
+    switch (mCalibration.pressureCalibration) {
+    case Calibration::PRESSURE_CALIBRATION_NONE:
+        dump.append(INDENT4 "touch.pressure.calibration: none\n");
+        break;
+    case Calibration::PRESSURE_CALIBRATION_PHYSICAL:
+        dump.append(INDENT4 "touch.pressure.calibration: physical\n");
+        break;
+    case Calibration::PRESSURE_CALIBRATION_AMPLITUDE:
+        dump.append(INDENT4 "touch.pressure.calibration: amplitude\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    if (mCalibration.havePressureScale) {
+        dump.appendFormat(INDENT4 "touch.pressure.scale: %0.3f\n",
+                mCalibration.pressureScale);
+    }
+
+    // Orientation
+    switch (mCalibration.orientationCalibration) {
+    case Calibration::ORIENTATION_CALIBRATION_NONE:
+        dump.append(INDENT4 "touch.orientation.calibration: none\n");
+        break;
+    case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
+        dump.append(INDENT4 "touch.orientation.calibration: interpolated\n");
+        break;
+    case Calibration::ORIENTATION_CALIBRATION_VECTOR:
+        dump.append(INDENT4 "touch.orientation.calibration: vector\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    // Distance
+    switch (mCalibration.distanceCalibration) {
+    case Calibration::DISTANCE_CALIBRATION_NONE:
+        dump.append(INDENT4 "touch.distance.calibration: none\n");
+        break;
+    case Calibration::DISTANCE_CALIBRATION_SCALED:
+        dump.append(INDENT4 "touch.distance.calibration: scaled\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    if (mCalibration.haveDistanceScale) {
+        dump.appendFormat(INDENT4 "touch.distance.scale: %0.3f\n",
+                mCalibration.distanceScale);
+    }
+
+    switch (mCalibration.coverageCalibration) {
+    case Calibration::COVERAGE_CALIBRATION_NONE:
+        dump.append(INDENT4 "touch.coverage.calibration: none\n");
+        break;
+    case Calibration::COVERAGE_CALIBRATION_BOX:
+        dump.append(INDENT4 "touch.coverage.calibration: box\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+}
+
+void TouchInputMapper::reset(nsecs_t when) {
+    mCursorButtonAccumulator.reset(getDevice());
+    mCursorScrollAccumulator.reset(getDevice());
+    mTouchButtonAccumulator.reset(getDevice());
+
+    mPointerVelocityControl.reset();
+    mWheelXVelocityControl.reset();
+    mWheelYVelocityControl.reset();
+
+    mCurrentRawPointerData.clear();
+    mLastRawPointerData.clear();
+    mCurrentCookedPointerData.clear();
+    mLastCookedPointerData.clear();
+    mCurrentButtonState = 0;
+    mLastButtonState = 0;
+    mCurrentRawVScroll = 0;
+    mCurrentRawHScroll = 0;
+    mCurrentFingerIdBits.clear();
+    mLastFingerIdBits.clear();
+    mCurrentStylusIdBits.clear();
+    mLastStylusIdBits.clear();
+    mCurrentMouseIdBits.clear();
+    mLastMouseIdBits.clear();
+    mPointerUsage = POINTER_USAGE_NONE;
+    mSentHoverEnter = false;
+    mDownTime = 0;
+
+    mCurrentVirtualKey.down = false;
+
+    mPointerGesture.reset();
+    mPointerSimple.reset();
+
+    if (mPointerController != NULL) {
+        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+        mPointerController->clearSpots();
+    }
+
+    InputMapper::reset(when);
+}
+
+void TouchInputMapper::process(const RawEvent* rawEvent) {
+    mCursorButtonAccumulator.process(rawEvent);
+    mCursorScrollAccumulator.process(rawEvent);
+    mTouchButtonAccumulator.process(rawEvent);
+
+    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
+        sync(rawEvent->when);
+    }
+}
+
+void TouchInputMapper::sync(nsecs_t when) {
+    // Sync button state.
+    mCurrentButtonState = mTouchButtonAccumulator.getButtonState()
+            | mCursorButtonAccumulator.getButtonState();
+
+    // Sync scroll state.
+    mCurrentRawVScroll = mCursorScrollAccumulator.getRelativeVWheel();
+    mCurrentRawHScroll = mCursorScrollAccumulator.getRelativeHWheel();
+    mCursorScrollAccumulator.finishSync();
+
+    // Sync touch state.
+    bool havePointerIds = true;
+    mCurrentRawPointerData.clear();
+    syncTouch(when, &havePointerIds);
+
+#if DEBUG_RAW_EVENTS
+    if (!havePointerIds) {
+        ALOGD("syncTouch: pointerCount %d -> %d, no pointer ids",
+                mLastRawPointerData.pointerCount,
+                mCurrentRawPointerData.pointerCount);
+    } else {
+        ALOGD("syncTouch: pointerCount %d -> %d, touching ids 0x%08x -> 0x%08x, "
+                "hovering ids 0x%08x -> 0x%08x",
+                mLastRawPointerData.pointerCount,
+                mCurrentRawPointerData.pointerCount,
+                mLastRawPointerData.touchingIdBits.value,
+                mCurrentRawPointerData.touchingIdBits.value,
+                mLastRawPointerData.hoveringIdBits.value,
+                mCurrentRawPointerData.hoveringIdBits.value);
+    }
+#endif
+
+    // Reset state that we will compute below.
+    mCurrentFingerIdBits.clear();
+    mCurrentStylusIdBits.clear();
+    mCurrentMouseIdBits.clear();
+    mCurrentCookedPointerData.clear();
+
+    if (mDeviceMode == DEVICE_MODE_DISABLED) {
+        // Drop all input if the device is disabled.
+        mCurrentRawPointerData.clear();
+        mCurrentButtonState = 0;
+    } else {
+        // Preprocess pointer data.
+        if (!havePointerIds) {
+            assignPointerIds();
+        }
+
+        // Handle policy on initial down or hover events.
+        uint32_t policyFlags = 0;
+        bool initialDown = mLastRawPointerData.pointerCount == 0
+                && mCurrentRawPointerData.pointerCount != 0;
+        bool buttonsPressed = mCurrentButtonState & ~mLastButtonState;
+        if (initialDown || buttonsPressed) {
+            // If this is a touch screen, hide the pointer on an initial down.
+            if (mDeviceMode == DEVICE_MODE_DIRECT) {
+                getContext()->fadePointer();
+            }
+
+            // Initial downs on external touch devices should wake the device.
+            // We don't do this for internal touch screens to prevent them from waking
+            // up in your pocket.
+            // TODO: Use the input device configuration to control this behavior more finely.
+            if (getDevice()->isExternal()) {
+                policyFlags |= POLICY_FLAG_WAKE_DROPPED;
+            }
+        }
+
+        // Synthesize key down from raw buttons if needed.
+        synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
+                policyFlags, mLastButtonState, mCurrentButtonState);
+
+        // Consume raw off-screen touches before cooking pointer data.
+        // If touches are consumed, subsequent code will not receive any pointer data.
+        if (consumeRawTouches(when, policyFlags)) {
+            mCurrentRawPointerData.clear();
+        }
+
+        // Cook pointer data.  This call populates the mCurrentCookedPointerData structure
+        // with cooked pointer data that has the same ids and indices as the raw data.
+        // The following code can use either the raw or cooked data, as needed.
+        cookPointerData();
+
+        // Dispatch the touches either directly or by translation through a pointer on screen.
+        if (mDeviceMode == DEVICE_MODE_POINTER) {
+            for (BitSet32 idBits(mCurrentRawPointerData.touchingIdBits); !idBits.isEmpty(); ) {
+                uint32_t id = idBits.clearFirstMarkedBit();
+                const RawPointerData::Pointer& pointer = mCurrentRawPointerData.pointerForId(id);
+                if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_STYLUS
+                        || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_ERASER) {
+                    mCurrentStylusIdBits.markBit(id);
+                } else if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_FINGER
+                        || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
+                    mCurrentFingerIdBits.markBit(id);
+                } else if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_MOUSE) {
+                    mCurrentMouseIdBits.markBit(id);
+                }
+            }
+            for (BitSet32 idBits(mCurrentRawPointerData.hoveringIdBits); !idBits.isEmpty(); ) {
+                uint32_t id = idBits.clearFirstMarkedBit();
+                const RawPointerData::Pointer& pointer = mCurrentRawPointerData.pointerForId(id);
+                if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_STYLUS
+                        || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_ERASER) {
+                    mCurrentStylusIdBits.markBit(id);
+                }
+            }
+
+            // Stylus takes precedence over all tools, then mouse, then finger.
+            PointerUsage pointerUsage = mPointerUsage;
+            if (!mCurrentStylusIdBits.isEmpty()) {
+                mCurrentMouseIdBits.clear();
+                mCurrentFingerIdBits.clear();
+                pointerUsage = POINTER_USAGE_STYLUS;
+            } else if (!mCurrentMouseIdBits.isEmpty()) {
+                mCurrentFingerIdBits.clear();
+                pointerUsage = POINTER_USAGE_MOUSE;
+            } else if (!mCurrentFingerIdBits.isEmpty() || isPointerDown(mCurrentButtonState)) {
+                pointerUsage = POINTER_USAGE_GESTURES;
+            }
+
+            dispatchPointerUsage(when, policyFlags, pointerUsage);
+        } else {
+            if (mDeviceMode == DEVICE_MODE_DIRECT
+                    && mConfig.showTouches && mPointerController != NULL) {
+                mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_SPOT);
+                mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+
+                mPointerController->setButtonState(mCurrentButtonState);
+                mPointerController->setSpots(mCurrentCookedPointerData.pointerCoords,
+                        mCurrentCookedPointerData.idToIndex,
+                        mCurrentCookedPointerData.touchingIdBits);
+            }
+
+            dispatchHoverExit(when, policyFlags);
+            dispatchTouches(when, policyFlags);
+            dispatchHoverEnterAndMove(when, policyFlags);
+        }
+
+        // Synthesize key up from raw buttons if needed.
+        synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
+                policyFlags, mLastButtonState, mCurrentButtonState);
+    }
+
+    // Copy current touch to last touch in preparation for the next cycle.
+    mLastRawPointerData.copyFrom(mCurrentRawPointerData);
+    mLastCookedPointerData.copyFrom(mCurrentCookedPointerData);
+    mLastButtonState = mCurrentButtonState;
+    mLastFingerIdBits = mCurrentFingerIdBits;
+    mLastStylusIdBits = mCurrentStylusIdBits;
+    mLastMouseIdBits = mCurrentMouseIdBits;
+
+    // Clear some transient state.
+    mCurrentRawVScroll = 0;
+    mCurrentRawHScroll = 0;
+}
+
+void TouchInputMapper::timeoutExpired(nsecs_t when) {
+    if (mDeviceMode == DEVICE_MODE_POINTER) {
+        if (mPointerUsage == POINTER_USAGE_GESTURES) {
+            dispatchPointerGestures(when, 0 /*policyFlags*/, true /*isTimeout*/);
+        }
+    }
+}
+
+bool TouchInputMapper::consumeRawTouches(nsecs_t when, uint32_t policyFlags) {
+    // Check for release of a virtual key.
+    if (mCurrentVirtualKey.down) {
+        if (mCurrentRawPointerData.touchingIdBits.isEmpty()) {
+            // Pointer went up while virtual key was down.
+            mCurrentVirtualKey.down = false;
+            if (!mCurrentVirtualKey.ignored) {
+#if DEBUG_VIRTUAL_KEYS
+                ALOGD("VirtualKeys: Generating key up: keyCode=%d, scanCode=%d",
+                        mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
+#endif
+                dispatchVirtualKey(when, policyFlags,
+                        AKEY_EVENT_ACTION_UP,
+                        AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
+            }
+            return true;
+        }
+
+        if (mCurrentRawPointerData.touchingIdBits.count() == 1) {
+            uint32_t id = mCurrentRawPointerData.touchingIdBits.firstMarkedBit();
+            const RawPointerData::Pointer& pointer = mCurrentRawPointerData.pointerForId(id);
+            const VirtualKey* virtualKey = findVirtualKeyHit(pointer.x, pointer.y);
+            if (virtualKey && virtualKey->keyCode == mCurrentVirtualKey.keyCode) {
+                // Pointer is still within the space of the virtual key.
+                return true;
+            }
+        }
+
+        // Pointer left virtual key area or another pointer also went down.
+        // Send key cancellation but do not consume the touch yet.
+        // This is useful when the user swipes through from the virtual key area
+        // into the main display surface.
+        mCurrentVirtualKey.down = false;
+        if (!mCurrentVirtualKey.ignored) {
+#if DEBUG_VIRTUAL_KEYS
+            ALOGD("VirtualKeys: Canceling key: keyCode=%d, scanCode=%d",
+                    mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
+#endif
+            dispatchVirtualKey(when, policyFlags,
+                    AKEY_EVENT_ACTION_UP,
+                    AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY
+                            | AKEY_EVENT_FLAG_CANCELED);
+        }
+    }
+
+    if (mLastRawPointerData.touchingIdBits.isEmpty()
+            && !mCurrentRawPointerData.touchingIdBits.isEmpty()) {
+        // Pointer just went down.  Check for virtual key press or off-screen touches.
+        uint32_t id = mCurrentRawPointerData.touchingIdBits.firstMarkedBit();
+        const RawPointerData::Pointer& pointer = mCurrentRawPointerData.pointerForId(id);
+        if (!isPointInsideSurface(pointer.x, pointer.y)) {
+            // If exactly one pointer went down, check for virtual key hit.
+            // Otherwise we will drop the entire stroke.
+            if (mCurrentRawPointerData.touchingIdBits.count() == 1) {
+                const VirtualKey* virtualKey = findVirtualKeyHit(pointer.x, pointer.y);
+                if (virtualKey) {
+                    mCurrentVirtualKey.down = true;
+                    mCurrentVirtualKey.downTime = when;
+                    mCurrentVirtualKey.keyCode = virtualKey->keyCode;
+                    mCurrentVirtualKey.scanCode = virtualKey->scanCode;
+                    mCurrentVirtualKey.ignored = mContext->shouldDropVirtualKey(
+                            when, getDevice(), virtualKey->keyCode, virtualKey->scanCode);
+
+                    if (!mCurrentVirtualKey.ignored) {
+#if DEBUG_VIRTUAL_KEYS
+                        ALOGD("VirtualKeys: Generating key down: keyCode=%d, scanCode=%d",
+                                mCurrentVirtualKey.keyCode,
+                                mCurrentVirtualKey.scanCode);
+#endif
+                        dispatchVirtualKey(when, policyFlags,
+                                AKEY_EVENT_ACTION_DOWN,
+                                AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
+                    }
+                }
+            }
+            return true;
+        }
+    }
+
+    // Disable all virtual key touches that happen within a short time interval of the
+    // most recent touch within the screen area.  The idea is to filter out stray
+    // virtual key presses when interacting with the touch screen.
+    //
+    // Problems we're trying to solve:
+    //
+    // 1. While scrolling a list or dragging the window shade, the user swipes down into a
+    //    virtual key area that is implemented by a separate touch panel and accidentally
+    //    triggers a virtual key.
+    //
+    // 2. While typing in the on screen keyboard, the user taps slightly outside the screen
+    //    area and accidentally triggers a virtual key.  This often happens when virtual keys
+    //    are layed out below the screen near to where the on screen keyboard's space bar
+    //    is displayed.
+    if (mConfig.virtualKeyQuietTime > 0 && !mCurrentRawPointerData.touchingIdBits.isEmpty()) {
+        mContext->disableVirtualKeysUntil(when + mConfig.virtualKeyQuietTime);
+    }
+    return false;
+}
+
+void TouchInputMapper::dispatchVirtualKey(nsecs_t when, uint32_t policyFlags,
+        int32_t keyEventAction, int32_t keyEventFlags) {
+    int32_t keyCode = mCurrentVirtualKey.keyCode;
+    int32_t scanCode = mCurrentVirtualKey.scanCode;
+    nsecs_t downTime = mCurrentVirtualKey.downTime;
+    int32_t metaState = mContext->getGlobalMetaState();
+    policyFlags |= POLICY_FLAG_VIRTUAL;
+
+    NotifyKeyArgs args(when, getDeviceId(), AINPUT_SOURCE_KEYBOARD, policyFlags,
+            keyEventAction, keyEventFlags, keyCode, scanCode, metaState, downTime);
+    getListener()->notifyKey(&args);
+}
+
+void TouchInputMapper::dispatchTouches(nsecs_t when, uint32_t policyFlags) {
+    BitSet32 currentIdBits = mCurrentCookedPointerData.touchingIdBits;
+    BitSet32 lastIdBits = mLastCookedPointerData.touchingIdBits;
+    int32_t metaState = getContext()->getGlobalMetaState();
+    int32_t buttonState = mCurrentButtonState;
+
+    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_EDGE_FLAG_NONE,
+                    mCurrentCookedPointerData.pointerProperties,
+                    mCurrentCookedPointerData.pointerCoords,
+                    mCurrentCookedPointerData.idToIndex,
+                    currentIdBits, -1,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+        }
+    } else {
+        // There may be pointers going up and pointers going down and pointers moving
+        // all at the same time.
+        BitSet32 upIdBits(lastIdBits.value & ~currentIdBits.value);
+        BitSet32 downIdBits(currentIdBits.value & ~lastIdBits.value);
+        BitSet32 moveIdBits(lastIdBits.value & currentIdBits.value);
+        BitSet32 dispatchedIdBits(lastIdBits.value);
+
+        // 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.
+        bool moveNeeded = updateMovedPointers(
+                mCurrentCookedPointerData.pointerProperties,
+                mCurrentCookedPointerData.pointerCoords,
+                mCurrentCookedPointerData.idToIndex,
+                mLastCookedPointerData.pointerProperties,
+                mLastCookedPointerData.pointerCoords,
+                mLastCookedPointerData.idToIndex,
+                moveIdBits);
+        if (buttonState != mLastButtonState) {
+            moveNeeded = true;
+        }
+
+        // Dispatch pointer up events.
+        while (!upIdBits.isEmpty()) {
+            uint32_t upId = upIdBits.clearFirstMarkedBit();
+
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_POINTER_UP, 0, metaState, buttonState, 0,
+                    mLastCookedPointerData.pointerProperties,
+                    mLastCookedPointerData.pointerCoords,
+                    mLastCookedPointerData.idToIndex,
+                    dispatchedIdBits, upId,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+            dispatchedIdBits.clearBit(upId);
+        }
+
+        // Dispatch move events if any of the remaining pointers moved from their old locations.
+        // Although applications receive new locations as part of individual pointer up
+        // events, they do not generally handle them except when presented in a move event.
+        if (moveNeeded) {
+            ALOG_ASSERT(moveIdBits.value == dispatchedIdBits.value);
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, 0,
+                    mCurrentCookedPointerData.pointerProperties,
+                    mCurrentCookedPointerData.pointerCoords,
+                    mCurrentCookedPointerData.idToIndex,
+                    dispatchedIdBits, -1,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+        }
+
+        // Dispatch pointer down events using the new pointer locations.
+        while (!downIdBits.isEmpty()) {
+            uint32_t downId = downIdBits.clearFirstMarkedBit();
+            dispatchedIdBits.markBit(downId);
+
+            if (dispatchedIdBits.count() == 1) {
+                // First pointer is going down.  Set down time.
+                mDownTime = when;
+            }
+
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, metaState, buttonState, 0,
+                    mCurrentCookedPointerData.pointerProperties,
+                    mCurrentCookedPointerData.pointerCoords,
+                    mCurrentCookedPointerData.idToIndex,
+                    dispatchedIdBits, downId,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+        }
+    }
+}
+
+void TouchInputMapper::dispatchHoverExit(nsecs_t when, uint32_t policyFlags) {
+    if (mSentHoverEnter &&
+            (mCurrentCookedPointerData.hoveringIdBits.isEmpty()
+                    || !mCurrentCookedPointerData.touchingIdBits.isEmpty())) {
+        int32_t metaState = getContext()->getGlobalMetaState();
+        dispatchMotion(when, policyFlags, mSource,
+                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, metaState, mLastButtonState, 0,
+                mLastCookedPointerData.pointerProperties,
+                mLastCookedPointerData.pointerCoords,
+                mLastCookedPointerData.idToIndex,
+                mLastCookedPointerData.hoveringIdBits, -1,
+                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+        mSentHoverEnter = false;
+    }
+}
+
+void TouchInputMapper::dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags) {
+    if (mCurrentCookedPointerData.touchingIdBits.isEmpty()
+            && !mCurrentCookedPointerData.hoveringIdBits.isEmpty()) {
+        int32_t metaState = getContext()->getGlobalMetaState();
+        if (!mSentHoverEnter) {
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, metaState, mCurrentButtonState, 0,
+                    mCurrentCookedPointerData.pointerProperties,
+                    mCurrentCookedPointerData.pointerCoords,
+                    mCurrentCookedPointerData.idToIndex,
+                    mCurrentCookedPointerData.hoveringIdBits, -1,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+            mSentHoverEnter = true;
+        }
+
+        dispatchMotion(when, policyFlags, mSource,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, metaState, mCurrentButtonState, 0,
+                mCurrentCookedPointerData.pointerProperties,
+                mCurrentCookedPointerData.pointerCoords,
+                mCurrentCookedPointerData.idToIndex,
+                mCurrentCookedPointerData.hoveringIdBits, -1,
+                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+    }
+}
+
+void TouchInputMapper::cookPointerData() {
+    uint32_t currentPointerCount = mCurrentRawPointerData.pointerCount;
+
+    mCurrentCookedPointerData.clear();
+    mCurrentCookedPointerData.pointerCount = currentPointerCount;
+    mCurrentCookedPointerData.hoveringIdBits = mCurrentRawPointerData.hoveringIdBits;
+    mCurrentCookedPointerData.touchingIdBits = mCurrentRawPointerData.touchingIdBits;
+
+    // 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++) {
+        const RawPointerData::Pointer& in = mCurrentRawPointerData.pointers[i];
+
+        // Size
+        float touchMajor, touchMinor, toolMajor, toolMinor, size;
+        switch (mCalibration.sizeCalibration) {
+        case Calibration::SIZE_CALIBRATION_GEOMETRIC:
+        case Calibration::SIZE_CALIBRATION_DIAMETER:
+        case Calibration::SIZE_CALIBRATION_BOX:
+        case Calibration::SIZE_CALIBRATION_AREA:
+            if (mRawPointerAxes.touchMajor.valid && mRawPointerAxes.toolMajor.valid) {
+                touchMajor = in.touchMajor;
+                touchMinor = mRawPointerAxes.touchMinor.valid ? in.touchMinor : in.touchMajor;
+                toolMajor = in.toolMajor;
+                toolMinor = mRawPointerAxes.toolMinor.valid ? in.toolMinor : in.toolMajor;
+                size = mRawPointerAxes.touchMinor.valid
+                        ? avg(in.touchMajor, in.touchMinor) : in.touchMajor;
+            } else if (mRawPointerAxes.touchMajor.valid) {
+                toolMajor = touchMajor = in.touchMajor;
+                toolMinor = touchMinor = mRawPointerAxes.touchMinor.valid
+                        ? in.touchMinor : in.touchMajor;
+                size = mRawPointerAxes.touchMinor.valid
+                        ? avg(in.touchMajor, in.touchMinor) : in.touchMajor;
+            } else if (mRawPointerAxes.toolMajor.valid) {
+                touchMajor = toolMajor = in.toolMajor;
+                touchMinor = toolMinor = mRawPointerAxes.toolMinor.valid
+                        ? in.toolMinor : in.toolMajor;
+                size = mRawPointerAxes.toolMinor.valid
+                        ? avg(in.toolMajor, in.toolMinor) : in.toolMajor;
+            } else {
+                ALOG_ASSERT(false, "No touch or tool axes.  "
+                        "Size calibration should have been resolved to NONE.");
+                touchMajor = 0;
+                touchMinor = 0;
+                toolMajor = 0;
+                toolMinor = 0;
+                size = 0;
+            }
+
+            if (mCalibration.haveSizeIsSummed && mCalibration.sizeIsSummed) {
+                uint32_t touchingCount = mCurrentRawPointerData.touchingIdBits.count();
+                if (touchingCount > 1) {
+                    touchMajor /= touchingCount;
+                    touchMinor /= touchingCount;
+                    toolMajor /= touchingCount;
+                    toolMinor /= touchingCount;
+                    size /= touchingCount;
+                }
+            }
+
+            if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_GEOMETRIC) {
+                touchMajor *= mGeometricScale;
+                touchMinor *= mGeometricScale;
+                toolMajor *= mGeometricScale;
+                toolMinor *= mGeometricScale;
+            } else if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_AREA) {
+                touchMajor = touchMajor > 0 ? sqrtf(touchMajor) : 0;
+                touchMinor = touchMajor;
+                toolMajor = toolMajor > 0 ? sqrtf(toolMajor) : 0;
+                toolMinor = toolMajor;
+            } else if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_DIAMETER) {
+                touchMinor = touchMajor;
+                toolMinor = toolMajor;
+            }
+
+            mCalibration.applySizeScaleAndBias(&touchMajor);
+            mCalibration.applySizeScaleAndBias(&touchMinor);
+            mCalibration.applySizeScaleAndBias(&toolMajor);
+            mCalibration.applySizeScaleAndBias(&toolMinor);
+            size *= mSizeScale;
+            break;
+        default:
+            touchMajor = 0;
+            touchMinor = 0;
+            toolMajor = 0;
+            toolMinor = 0;
+            size = 0;
+            break;
+        }
+
+        // Pressure
+        float pressure;
+        switch (mCalibration.pressureCalibration) {
+        case Calibration::PRESSURE_CALIBRATION_PHYSICAL:
+        case Calibration::PRESSURE_CALIBRATION_AMPLITUDE:
+            pressure = in.pressure * mPressureScale;
+            break;
+        default:
+            pressure = in.isHovering ? 0 : 1;
+            break;
+        }
+
+        // Tilt and Orientation
+        float tilt;
+        float orientation;
+        if (mHaveTilt) {
+            float tiltXAngle = (in.tiltX - mTiltXCenter) * mTiltXScale;
+            float tiltYAngle = (in.tiltY - mTiltYCenter) * mTiltYScale;
+            orientation = atan2f(-sinf(tiltXAngle), sinf(tiltYAngle));
+            tilt = acosf(cosf(tiltXAngle) * cosf(tiltYAngle));
+        } else {
+            tilt = 0;
+
+            switch (mCalibration.orientationCalibration) {
+            case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
+                orientation = in.orientation * mOrientationScale;
+                break;
+            case Calibration::ORIENTATION_CALIBRATION_VECTOR: {
+                int32_t c1 = signExtendNybble((in.orientation & 0xf0) >> 4);
+                int32_t c2 = signExtendNybble(in.orientation & 0x0f);
+                if (c1 != 0 || c2 != 0) {
+                    orientation = atan2f(c1, c2) * 0.5f;
+                    float confidence = hypotf(c1, c2);
+                    float scale = 1.0f + confidence / 16.0f;
+                    touchMajor *= scale;
+                    touchMinor /= scale;
+                    toolMajor *= scale;
+                    toolMinor /= scale;
+                } else {
+                    orientation = 0;
+                }
+                break;
+            }
+            default:
+                orientation = 0;
+            }
+        }
+
+        // Distance
+        float distance;
+        switch (mCalibration.distanceCalibration) {
+        case Calibration::DISTANCE_CALIBRATION_SCALED:
+            distance = in.distance * mDistanceScale;
+            break;
+        default:
+            distance = 0;
+        }
+
+        // Coverage
+        int32_t rawLeft, rawTop, rawRight, rawBottom;
+        switch (mCalibration.coverageCalibration) {
+        case Calibration::COVERAGE_CALIBRATION_BOX:
+            rawLeft = (in.toolMinor & 0xffff0000) >> 16;
+            rawRight = in.toolMinor & 0x0000ffff;
+            rawBottom = in.toolMajor & 0x0000ffff;
+            rawTop = (in.toolMajor & 0xffff0000) >> 16;
+            break;
+        default:
+            rawLeft = rawTop = rawRight = rawBottom = 0;
+            break;
+        }
+
+        // X, Y, and the bounding box for coverage information
+        // Adjust coords for surface orientation.
+        float x, y, left, top, right, bottom;
+        switch (mSurfaceOrientation) {
+        case DISPLAY_ORIENTATION_90:
+            x = float(in.y - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            y = float(mRawPointerAxes.x.maxValue - in.x) * mXScale + mXTranslate;
+            left = float(rawTop - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            right = float(rawBottom- mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            bottom = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale + mXTranslate;
+            top = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale + mXTranslate;
+            orientation -= M_PI_2;
+            if (orientation < - M_PI_2) {
+                orientation += M_PI;
+            }
+            break;
+        case DISPLAY_ORIENTATION_180:
+            x = float(mRawPointerAxes.x.maxValue - in.x) * mXScale + mXTranslate;
+            y = float(mRawPointerAxes.y.maxValue - in.y) * mYScale + mYTranslate;
+            left = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale + mXTranslate;
+            right = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale + mXTranslate;
+            bottom = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale + mYTranslate;
+            top = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale + mYTranslate;
+            break;
+        case DISPLAY_ORIENTATION_270:
+            x = float(mRawPointerAxes.y.maxValue - in.y) * mYScale + mYTranslate;
+            y = float(in.x - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            left = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale + mYTranslate;
+            right = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale + mYTranslate;
+            bottom = float(rawRight - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            top = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            orientation += M_PI_2;
+            if (orientation > M_PI_2) {
+                orientation -= M_PI;
+            }
+            break;
+        default:
+            x = float(in.x - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            y = float(in.y - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            left = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            right = float(rawRight - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            bottom = float(rawBottom - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            top = float(rawTop - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            break;
+        }
+
+        // Write output coords.
+        PointerCoords& out = mCurrentCookedPointerData.pointerCoords[i];
+        out.clear();
+        out.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        out.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        out.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, pressure);
+        out.setAxisValue(AMOTION_EVENT_AXIS_SIZE, size);
+        out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR, touchMajor);
+        out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR, touchMinor);
+        out.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, orientation);
+        out.setAxisValue(AMOTION_EVENT_AXIS_TILT, tilt);
+        out.setAxisValue(AMOTION_EVENT_AXIS_DISTANCE, distance);
+        if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_BOX) {
+            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_1, left);
+            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_2, top);
+            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_3, right);
+            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_4, bottom);
+        } else {
+            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, toolMajor);
+            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR, toolMinor);
+        }
+
+        // Write output properties.
+        PointerProperties& properties = mCurrentCookedPointerData.pointerProperties[i];
+        uint32_t id = in.id;
+        properties.clear();
+        properties.id = id;
+        properties.toolType = in.toolType;
+
+        // Write id index.
+        mCurrentCookedPointerData.idToIndex[id] = i;
+    }
+}
+
+void TouchInputMapper::dispatchPointerUsage(nsecs_t when, uint32_t policyFlags,
+        PointerUsage pointerUsage) {
+    if (pointerUsage != mPointerUsage) {
+        abortPointerUsage(when, policyFlags);
+        mPointerUsage = pointerUsage;
+    }
+
+    switch (mPointerUsage) {
+    case POINTER_USAGE_GESTURES:
+        dispatchPointerGestures(when, policyFlags, false /*isTimeout*/);
+        break;
+    case POINTER_USAGE_STYLUS:
+        dispatchPointerStylus(when, policyFlags);
+        break;
+    case POINTER_USAGE_MOUSE:
+        dispatchPointerMouse(when, policyFlags);
+        break;
+    default:
+        break;
+    }
+}
+
+void TouchInputMapper::abortPointerUsage(nsecs_t when, uint32_t policyFlags) {
+    switch (mPointerUsage) {
+    case POINTER_USAGE_GESTURES:
+        abortPointerGestures(when, policyFlags);
+        break;
+    case POINTER_USAGE_STYLUS:
+        abortPointerStylus(when, policyFlags);
+        break;
+    case POINTER_USAGE_MOUSE:
+        abortPointerMouse(when, policyFlags);
+        break;
+    default:
+        break;
+    }
+
+    mPointerUsage = POINTER_USAGE_NONE;
+}
+
+void TouchInputMapper::dispatchPointerGestures(nsecs_t when, uint32_t policyFlags,
+        bool isTimeout) {
+    // Update current gesture coordinates.
+    bool cancelPreviousGesture, finishPreviousGesture;
+    bool sendEvents = preparePointerGestures(when,
+            &cancelPreviousGesture, &finishPreviousGesture, isTimeout);
+    if (!sendEvents) {
+        return;
+    }
+    if (finishPreviousGesture) {
+        cancelPreviousGesture = false;
+    }
+
+    // Update the pointer presentation and spots.
+    if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS) {
+        mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_SPOT);
+        if (finishPreviousGesture || cancelPreviousGesture) {
+            mPointerController->clearSpots();
+        }
+        mPointerController->setSpots(mPointerGesture.currentGestureCoords,
+                mPointerGesture.currentGestureIdToIndex,
+                mPointerGesture.currentGestureIdBits);
+    } else {
+        mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
+    }
+
+    // Show or hide the pointer if needed.
+    switch (mPointerGesture.currentGestureMode) {
+    case PointerGesture::NEUTRAL:
+    case PointerGesture::QUIET:
+        if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS
+                && (mPointerGesture.lastGestureMode == PointerGesture::SWIPE
+                        || mPointerGesture.lastGestureMode == PointerGesture::FREEFORM)) {
+            // Remind the user of where the pointer is after finishing a gesture with spots.
+            mPointerController->unfade(PointerControllerInterface::TRANSITION_GRADUAL);
+        }
+        break;
+    case PointerGesture::TAP:
+    case PointerGesture::TAP_DRAG:
+    case PointerGesture::BUTTON_CLICK_OR_DRAG:
+    case PointerGesture::HOVER:
+    case PointerGesture::PRESS:
+        // Unfade the pointer when the current gesture manipulates the
+        // area directly under the pointer.
+        mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
+        break;
+    case PointerGesture::SWIPE:
+    case PointerGesture::FREEFORM:
+        // Fade the pointer when the current gesture manipulates a different
+        // area and there are spots to guide the user experience.
+        if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS) {
+            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+        } else {
+            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
+        }
+        break;
+    }
+
+    // Send events!
+    int32_t metaState = getContext()->getGlobalMetaState();
+    int32_t buttonState = mCurrentButtonState;
+
+    // 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.
+    bool down = mPointerGesture.currentGestureMode == PointerGesture::TAP
+            || mPointerGesture.currentGestureMode == PointerGesture::TAP_DRAG
+            || mPointerGesture.currentGestureMode == PointerGesture::BUTTON_CLICK_OR_DRAG
+            || mPointerGesture.currentGestureMode == PointerGesture::PRESS
+            || mPointerGesture.currentGestureMode == PointerGesture::SWIPE
+            || mPointerGesture.currentGestureMode == PointerGesture::FREEFORM;
+    bool moveNeeded = false;
+    if (down && !cancelPreviousGesture && !finishPreviousGesture
+            && !mPointerGesture.lastGestureIdBits.isEmpty()
+            && !mPointerGesture.currentGestureIdBits.isEmpty()) {
+        BitSet32 movedGestureIdBits(mPointerGesture.currentGestureIdBits.value
+                & mPointerGesture.lastGestureIdBits.value);
+        moveNeeded = updateMovedPointers(mPointerGesture.currentGestureProperties,
+                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
+                mPointerGesture.lastGestureProperties,
+                mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
+                movedGestureIdBits);
+        if (buttonState != mLastButtonState) {
+            moveNeeded = true;
+        }
+    }
+
+    // Send motion events for all pointers that went up or were canceled.
+    BitSet32 dispatchedGestureIdBits(mPointerGesture.lastGestureIdBits);
+    if (!dispatchedGestureIdBits.isEmpty()) {
+        if (cancelPreviousGesture) {
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_CANCEL, 0, metaState, buttonState,
+                    AMOTION_EVENT_EDGE_FLAG_NONE,
+                    mPointerGesture.lastGestureProperties,
+                    mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
+                    dispatchedGestureIdBits, -1,
+                    0, 0, mPointerGesture.downTime);
+
+            dispatchedGestureIdBits.clear();
+        } else {
+            BitSet32 upGestureIdBits;
+            if (finishPreviousGesture) {
+                upGestureIdBits = dispatchedGestureIdBits;
+            } else {
+                upGestureIdBits.value = dispatchedGestureIdBits.value
+                        & ~mPointerGesture.currentGestureIdBits.value;
+            }
+            while (!upGestureIdBits.isEmpty()) {
+                uint32_t id = upGestureIdBits.clearFirstMarkedBit();
+
+                dispatchMotion(when, policyFlags, mSource,
+                        AMOTION_EVENT_ACTION_POINTER_UP, 0,
+                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                        mPointerGesture.lastGestureProperties,
+                        mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
+                        dispatchedGestureIdBits, id,
+                        0, 0, mPointerGesture.downTime);
+
+                dispatchedGestureIdBits.clearBit(id);
+            }
+        }
+    }
+
+    // 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,
+                mPointerGesture.currentGestureProperties,
+                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
+                dispatchedGestureIdBits, -1,
+                0, 0, mPointerGesture.downTime);
+    }
+
+    // Send motion events for all pointers that went down.
+    if (down) {
+        BitSet32 downGestureIdBits(mPointerGesture.currentGestureIdBits.value
+                & ~dispatchedGestureIdBits.value);
+        while (!downGestureIdBits.isEmpty()) {
+            uint32_t id = downGestureIdBits.clearFirstMarkedBit();
+            dispatchedGestureIdBits.markBit(id);
+
+            if (dispatchedGestureIdBits.count() == 1) {
+                mPointerGesture.downTime = when;
+            }
+
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, metaState, buttonState, 0,
+                    mPointerGesture.currentGestureProperties,
+                    mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
+                    dispatchedGestureIdBits, id,
+                    0, 0, mPointerGesture.downTime);
+        }
+    }
+
+    // Send motion events for hover.
+    if (mPointerGesture.currentGestureMode == PointerGesture::HOVER) {
+        dispatchMotion(when, policyFlags, mSource,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                mPointerGesture.currentGestureProperties,
+                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
+                mPointerGesture.currentGestureIdBits, -1,
+                0, 0, mPointerGesture.downTime);
+    } else if (dispatchedGestureIdBits.isEmpty()
+            && !mPointerGesture.lastGestureIdBits.isEmpty()) {
+        // Synthesize a hover move event after all pointers go up to indicate that
+        // the pointer is hovering again even if the user is not currently touching
+        // the touch pad.  This ensures that a view will receive a fresh hover enter
+        // event after a tap.
+        float x, y;
+        mPointerController->getPosition(&x, &y);
+
+        PointerProperties pointerProperties;
+        pointerProperties.clear();
+        pointerProperties.id = 0;
+        pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+
+        PointerCoords pointerCoords;
+        pointerCoords.clear();
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                mViewport.displayId, 1, &pointerProperties, &pointerCoords,
+                0, 0, mPointerGesture.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    // Update state.
+    mPointerGesture.lastGestureMode = mPointerGesture.currentGestureMode;
+    if (!down) {
+        mPointerGesture.lastGestureIdBits.clear();
+    } else {
+        mPointerGesture.lastGestureIdBits = mPointerGesture.currentGestureIdBits;
+        for (BitSet32 idBits(mPointerGesture.currentGestureIdBits); !idBits.isEmpty(); ) {
+            uint32_t id = idBits.clearFirstMarkedBit();
+            uint32_t index = mPointerGesture.currentGestureIdToIndex[id];
+            mPointerGesture.lastGestureProperties[index].copyFrom(
+                    mPointerGesture.currentGestureProperties[index]);
+            mPointerGesture.lastGestureCoords[index].copyFrom(
+                    mPointerGesture.currentGestureCoords[index]);
+            mPointerGesture.lastGestureIdToIndex[id] = index;
+        }
+    }
+}
+
+void TouchInputMapper::abortPointerGestures(nsecs_t when, uint32_t policyFlags) {
+    // Cancel previously dispatches pointers.
+    if (!mPointerGesture.lastGestureIdBits.isEmpty()) {
+        int32_t metaState = getContext()->getGlobalMetaState();
+        int32_t buttonState = mCurrentButtonState;
+        dispatchMotion(when, policyFlags, mSource,
+                AMOTION_EVENT_ACTION_CANCEL, 0, metaState, buttonState,
+                AMOTION_EVENT_EDGE_FLAG_NONE,
+                mPointerGesture.lastGestureProperties,
+                mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
+                mPointerGesture.lastGestureIdBits, -1,
+                0, 0, mPointerGesture.downTime);
+    }
+
+    // Reset the current pointer gesture.
+    mPointerGesture.reset();
+    mPointerVelocityControl.reset();
+
+    // Remove any current spots.
+    if (mPointerController != NULL) {
+        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+        mPointerController->clearSpots();
+    }
+}
+
+bool TouchInputMapper::preparePointerGestures(nsecs_t when,
+        bool* outCancelPreviousGesture, bool* outFinishPreviousGesture, bool isTimeout) {
+    *outCancelPreviousGesture = false;
+    *outFinishPreviousGesture = false;
+
+    // Handle TAP timeout.
+    if (isTimeout) {
+#if DEBUG_GESTURES
+        ALOGD("Gestures: Processing timeout");
+#endif
+
+        if (mPointerGesture.lastGestureMode == PointerGesture::TAP) {
+            if (when <= mPointerGesture.tapUpTime + mConfig.pointerGestureTapDragInterval) {
+                // The tap/drag timeout has not yet expired.
+                getContext()->requestTimeoutAtTime(mPointerGesture.tapUpTime
+                        + mConfig.pointerGestureTapDragInterval);
+            } else {
+                // The tap is finished.
+#if DEBUG_GESTURES
+                ALOGD("Gestures: TAP finished");
+#endif
+                *outFinishPreviousGesture = true;
+
+                mPointerGesture.activeGestureId = -1;
+                mPointerGesture.currentGestureMode = PointerGesture::NEUTRAL;
+                mPointerGesture.currentGestureIdBits.clear();
+
+                mPointerVelocityControl.reset();
+                return true;
+            }
+        }
+
+        // We did not handle this timeout.
+        return false;
+    }
+
+    const uint32_t currentFingerCount = mCurrentFingerIdBits.count();
+    const uint32_t lastFingerCount = mLastFingerIdBits.count();
+
+    // Update the velocity tracker.
+    {
+        VelocityTracker::Position positions[MAX_POINTERS];
+        uint32_t count = 0;
+        for (BitSet32 idBits(mCurrentFingerIdBits); !idBits.isEmpty(); count++) {
+            uint32_t id = idBits.clearFirstMarkedBit();
+            const RawPointerData::Pointer& pointer = mCurrentRawPointerData.pointerForId(id);
+            positions[count].x = pointer.x * mPointerXMovementScale;
+            positions[count].y = pointer.y * mPointerYMovementScale;
+        }
+        mPointerGesture.velocityTracker.addMovement(when,
+                mCurrentFingerIdBits, positions);
+    }
+
+    // Pick a new active touch id if needed.
+    // Choose an arbitrary pointer that just went down, if there is one.
+    // Otherwise choose an arbitrary remaining pointer.
+    // This guarantees we always have an active touch id when there is at least one pointer.
+    // We keep the same active touch id for as long as possible.
+    int32_t lastActiveTouchId = mPointerGesture.activeTouchId;
+    int32_t activeTouchId = lastActiveTouchId;
+    if (activeTouchId < 0) {
+        if (!mCurrentFingerIdBits.isEmpty()) {
+            activeTouchId = mPointerGesture.activeTouchId =
+                    mCurrentFingerIdBits.firstMarkedBit();
+            mPointerGesture.firstTouchTime = when;
+        }
+    } else if (!mCurrentFingerIdBits.hasBit(activeTouchId)) {
+        if (!mCurrentFingerIdBits.isEmpty()) {
+            activeTouchId = mPointerGesture.activeTouchId =
+                    mCurrentFingerIdBits.firstMarkedBit();
+        } else {
+            activeTouchId = mPointerGesture.activeTouchId = -1;
+        }
+    }
+
+    // Determine whether we are in quiet time.
+    bool isQuietTime = false;
+    if (activeTouchId < 0) {
+        mPointerGesture.resetQuietTime();
+    } else {
+        isQuietTime = when < mPointerGesture.quietTime + mConfig.pointerGestureQuietInterval;
+        if (!isQuietTime) {
+            if ((mPointerGesture.lastGestureMode == PointerGesture::PRESS
+                    || mPointerGesture.lastGestureMode == PointerGesture::SWIPE
+                    || mPointerGesture.lastGestureMode == PointerGesture::FREEFORM)
+                    && currentFingerCount < 2) {
+                // Enter quiet time when exiting swipe or freeform state.
+                // This is to prevent accidentally entering the hover state and flinging the
+                // pointer when finishing a swipe and there is still one pointer left onscreen.
+                isQuietTime = true;
+            } else if (mPointerGesture.lastGestureMode == PointerGesture::BUTTON_CLICK_OR_DRAG
+                    && currentFingerCount >= 2
+                    && !isPointerDown(mCurrentButtonState)) {
+                // Enter quiet time when releasing the button and there are still two or more
+                // fingers down.  This may indicate that one finger was used to press the button
+                // but it has not gone up yet.
+                isQuietTime = true;
+            }
+            if (isQuietTime) {
+                mPointerGesture.quietTime = when;
+            }
+        }
+    }
+
+    // Switch states based on button and pointer state.
+    if (isQuietTime) {
+        // Case 1: Quiet time. (QUIET)
+#if DEBUG_GESTURES
+        ALOGD("Gestures: QUIET for next %0.3fms", (mPointerGesture.quietTime
+                + mConfig.pointerGestureQuietInterval - when) * 0.000001f);
+#endif
+        if (mPointerGesture.lastGestureMode != PointerGesture::QUIET) {
+            *outFinishPreviousGesture = true;
+        }
+
+        mPointerGesture.activeGestureId = -1;
+        mPointerGesture.currentGestureMode = PointerGesture::QUIET;
+        mPointerGesture.currentGestureIdBits.clear();
+
+        mPointerVelocityControl.reset();
+    } else if (isPointerDown(mCurrentButtonState)) {
+        // Case 2: Button is pressed. (BUTTON_CLICK_OR_DRAG)
+        // The pointer follows the active touch point.
+        // Emit DOWN, MOVE, UP events at the pointer location.
+        //
+        // Only the active touch matters; other fingers are ignored.  This policy helps
+        // to handle the case where the user places a second finger on the touch pad
+        // to apply the necessary force to depress an integrated button below the surface.
+        // We don't want the second finger to be delivered to applications.
+        //
+        // For this to work well, we need to make sure to track the pointer that is really
+        // active.  If the user first puts one finger down to click then adds another
+        // finger to drag then the active pointer should switch to the finger that is
+        // being dragged.
+#if DEBUG_GESTURES
+        ALOGD("Gestures: BUTTON_CLICK_OR_DRAG activeTouchId=%d, "
+                "currentFingerCount=%d", activeTouchId, currentFingerCount);
+#endif
+        // Reset state when just starting.
+        if (mPointerGesture.lastGestureMode != PointerGesture::BUTTON_CLICK_OR_DRAG) {
+            *outFinishPreviousGesture = true;
+            mPointerGesture.activeGestureId = 0;
+        }
+
+        // Switch pointers if needed.
+        // Find the fastest pointer and follow it.
+        if (activeTouchId >= 0 && currentFingerCount > 1) {
+            int32_t bestId = -1;
+            float bestSpeed = mConfig.pointerGestureDragMinSwitchSpeed;
+            for (BitSet32 idBits(mCurrentFingerIdBits); !idBits.isEmpty(); ) {
+                uint32_t id = idBits.clearFirstMarkedBit();
+                float vx, vy;
+                if (mPointerGesture.velocityTracker.getVelocity(id, &vx, &vy)) {
+                    float speed = hypotf(vx, vy);
+                    if (speed > bestSpeed) {
+                        bestId = id;
+                        bestSpeed = speed;
+                    }
+                }
+            }
+            if (bestId >= 0 && bestId != activeTouchId) {
+                mPointerGesture.activeTouchId = activeTouchId = bestId;
+#if DEBUG_GESTURES
+                ALOGD("Gestures: BUTTON_CLICK_OR_DRAG switched pointers, "
+                        "bestId=%d, bestSpeed=%0.3f", bestId, bestSpeed);
+#endif
+            }
+        }
+
+        if (activeTouchId >= 0 && mLastFingerIdBits.hasBit(activeTouchId)) {
+            const RawPointerData::Pointer& currentPointer =
+                    mCurrentRawPointerData.pointerForId(activeTouchId);
+            const RawPointerData::Pointer& lastPointer =
+                    mLastRawPointerData.pointerForId(activeTouchId);
+            float deltaX = (currentPointer.x - lastPointer.x) * mPointerXMovementScale;
+            float deltaY = (currentPointer.y - lastPointer.y) * mPointerYMovementScale;
+
+            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
+            mPointerVelocityControl.move(when, &deltaX, &deltaY);
+
+            // Move the pointer using a relative motion.
+            // When using spots, the click will occur at the position of the anchor
+            // spot and all other spots will move there.
+            mPointerController->move(deltaX, deltaY);
+        } else {
+            mPointerVelocityControl.reset();
+        }
+
+        float x, y;
+        mPointerController->getPosition(&x, &y);
+
+        mPointerGesture.currentGestureMode = PointerGesture::BUTTON_CLICK_OR_DRAG;
+        mPointerGesture.currentGestureIdBits.clear();
+        mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
+        mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
+        mPointerGesture.currentGestureProperties[0].clear();
+        mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
+        mPointerGesture.currentGestureProperties[0].toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+        mPointerGesture.currentGestureCoords[0].clear();
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
+    } else if (currentFingerCount == 0) {
+        // Case 3. No fingers down and button is not pressed. (NEUTRAL)
+        if (mPointerGesture.lastGestureMode != PointerGesture::NEUTRAL) {
+            *outFinishPreviousGesture = true;
+        }
+
+        // Watch for taps coming out of HOVER or TAP_DRAG mode.
+        // Checking for taps after TAP_DRAG allows us to detect double-taps.
+        bool tapped = false;
+        if ((mPointerGesture.lastGestureMode == PointerGesture::HOVER
+                || mPointerGesture.lastGestureMode == PointerGesture::TAP_DRAG)
+                && lastFingerCount == 1) {
+            if (when <= mPointerGesture.tapDownTime + mConfig.pointerGestureTapInterval) {
+                float x, y;
+                mPointerController->getPosition(&x, &y);
+                if (fabs(x - mPointerGesture.tapX) <= mConfig.pointerGestureTapSlop
+                        && fabs(y - mPointerGesture.tapY) <= mConfig.pointerGestureTapSlop) {
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: TAP");
+#endif
+
+                    mPointerGesture.tapUpTime = when;
+                    getContext()->requestTimeoutAtTime(when
+                            + mConfig.pointerGestureTapDragInterval);
+
+                    mPointerGesture.activeGestureId = 0;
+                    mPointerGesture.currentGestureMode = PointerGesture::TAP;
+                    mPointerGesture.currentGestureIdBits.clear();
+                    mPointerGesture.currentGestureIdBits.markBit(
+                            mPointerGesture.activeGestureId);
+                    mPointerGesture.currentGestureIdToIndex[
+                            mPointerGesture.activeGestureId] = 0;
+                    mPointerGesture.currentGestureProperties[0].clear();
+                    mPointerGesture.currentGestureProperties[0].id =
+                            mPointerGesture.activeGestureId;
+                    mPointerGesture.currentGestureProperties[0].toolType =
+                            AMOTION_EVENT_TOOL_TYPE_FINGER;
+                    mPointerGesture.currentGestureCoords[0].clear();
+                    mPointerGesture.currentGestureCoords[0].setAxisValue(
+                            AMOTION_EVENT_AXIS_X, mPointerGesture.tapX);
+                    mPointerGesture.currentGestureCoords[0].setAxisValue(
+                            AMOTION_EVENT_AXIS_Y, mPointerGesture.tapY);
+                    mPointerGesture.currentGestureCoords[0].setAxisValue(
+                            AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
+
+                    tapped = true;
+                } else {
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: Not a TAP, deltaX=%f, deltaY=%f",
+                            x - mPointerGesture.tapX,
+                            y - mPointerGesture.tapY);
+#endif
+                }
+            } else {
+#if DEBUG_GESTURES
+                ALOGD("Gestures: Not a TAP, %0.3fms since down",
+                        (when - mPointerGesture.tapDownTime) * 0.000001f);
+#endif
+            }
+        }
+
+        mPointerVelocityControl.reset();
+
+        if (!tapped) {
+#if DEBUG_GESTURES
+            ALOGD("Gestures: NEUTRAL");
+#endif
+            mPointerGesture.activeGestureId = -1;
+            mPointerGesture.currentGestureMode = PointerGesture::NEUTRAL;
+            mPointerGesture.currentGestureIdBits.clear();
+        }
+    } else if (currentFingerCount == 1) {
+        // Case 4. Exactly one finger down, button is not pressed. (HOVER or TAP_DRAG)
+        // The pointer follows the active touch point.
+        // When in HOVER, emit HOVER_MOVE events at the pointer location.
+        // When in TAP_DRAG, emit MOVE events at the pointer location.
+        ALOG_ASSERT(activeTouchId >= 0);
+
+        mPointerGesture.currentGestureMode = PointerGesture::HOVER;
+        if (mPointerGesture.lastGestureMode == PointerGesture::TAP) {
+            if (when <= mPointerGesture.tapUpTime + mConfig.pointerGestureTapDragInterval) {
+                float x, y;
+                mPointerController->getPosition(&x, &y);
+                if (fabs(x - mPointerGesture.tapX) <= mConfig.pointerGestureTapSlop
+                        && fabs(y - mPointerGesture.tapY) <= mConfig.pointerGestureTapSlop) {
+                    mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
+                } else {
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: Not a TAP_DRAG, deltaX=%f, deltaY=%f",
+                            x - mPointerGesture.tapX,
+                            y - mPointerGesture.tapY);
+#endif
+                }
+            } else {
+#if DEBUG_GESTURES
+                ALOGD("Gestures: Not a TAP_DRAG, %0.3fms time since up",
+                        (when - mPointerGesture.tapUpTime) * 0.000001f);
+#endif
+            }
+        } else if (mPointerGesture.lastGestureMode == PointerGesture::TAP_DRAG) {
+            mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
+        }
+
+        if (mLastFingerIdBits.hasBit(activeTouchId)) {
+            const RawPointerData::Pointer& currentPointer =
+                    mCurrentRawPointerData.pointerForId(activeTouchId);
+            const RawPointerData::Pointer& lastPointer =
+                    mLastRawPointerData.pointerForId(activeTouchId);
+            float deltaX = (currentPointer.x - lastPointer.x)
+                    * mPointerXMovementScale;
+            float deltaY = (currentPointer.y - lastPointer.y)
+                    * mPointerYMovementScale;
+
+            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
+            mPointerVelocityControl.move(when, &deltaX, &deltaY);
+
+            // Move the pointer using a relative motion.
+            // When using spots, the hover or drag will occur at the position of the anchor spot.
+            mPointerController->move(deltaX, deltaY);
+        } else {
+            mPointerVelocityControl.reset();
+        }
+
+        bool down;
+        if (mPointerGesture.currentGestureMode == PointerGesture::TAP_DRAG) {
+#if DEBUG_GESTURES
+            ALOGD("Gestures: TAP_DRAG");
+#endif
+            down = true;
+        } else {
+#if DEBUG_GESTURES
+            ALOGD("Gestures: HOVER");
+#endif
+            if (mPointerGesture.lastGestureMode != PointerGesture::HOVER) {
+                *outFinishPreviousGesture = true;
+            }
+            mPointerGesture.activeGestureId = 0;
+            down = false;
+        }
+
+        float x, y;
+        mPointerController->getPosition(&x, &y);
+
+        mPointerGesture.currentGestureIdBits.clear();
+        mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
+        mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
+        mPointerGesture.currentGestureProperties[0].clear();
+        mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
+        mPointerGesture.currentGestureProperties[0].toolType =
+                AMOTION_EVENT_TOOL_TYPE_FINGER;
+        mPointerGesture.currentGestureCoords[0].clear();
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
+                down ? 1.0f : 0.0f);
+
+        if (lastFingerCount == 0 && currentFingerCount != 0) {
+            mPointerGesture.resetTap();
+            mPointerGesture.tapDownTime = when;
+            mPointerGesture.tapX = x;
+            mPointerGesture.tapY = y;
+        }
+    } else {
+        // Case 5. At least two fingers down, button is not pressed. (PRESS, SWIPE or FREEFORM)
+        // We need to provide feedback for each finger that goes down so we cannot wait
+        // for the fingers to move before deciding what to do.
+        //
+        // The ambiguous case is deciding what to do when there are two fingers down but they
+        // have not moved enough to determine whether they are part of a drag or part of a
+        // freeform gesture, or just a press or long-press at the pointer location.
+        //
+        // When there are two fingers we start with the PRESS hypothesis and we generate a
+        // down at the pointer location.
+        //
+        // When the two fingers move enough or when additional fingers are added, we make
+        // a decision to transition into SWIPE or FREEFORM mode accordingly.
+        ALOG_ASSERT(activeTouchId >= 0);
+
+        bool settled = when >= mPointerGesture.firstTouchTime
+                + mConfig.pointerGestureMultitouchSettleInterval;
+        if (mPointerGesture.lastGestureMode != PointerGesture::PRESS
+                && mPointerGesture.lastGestureMode != PointerGesture::SWIPE
+                && mPointerGesture.lastGestureMode != PointerGesture::FREEFORM) {
+            *outFinishPreviousGesture = true;
+        } else if (!settled && currentFingerCount > lastFingerCount) {
+            // Additional pointers have gone down but not yet settled.
+            // Reset the gesture.
+#if DEBUG_GESTURES
+            ALOGD("Gestures: Resetting gesture since additional pointers went down for MULTITOUCH, "
+                    "settle time remaining %0.3fms", (mPointerGesture.firstTouchTime
+                            + mConfig.pointerGestureMultitouchSettleInterval - when)
+                            * 0.000001f);
+#endif
+            *outCancelPreviousGesture = true;
+        } else {
+            // Continue previous gesture.
+            mPointerGesture.currentGestureMode = mPointerGesture.lastGestureMode;
+        }
+
+        if (*outFinishPreviousGesture || *outCancelPreviousGesture) {
+            mPointerGesture.currentGestureMode = PointerGesture::PRESS;
+            mPointerGesture.activeGestureId = 0;
+            mPointerGesture.referenceIdBits.clear();
+            mPointerVelocityControl.reset();
+
+            // Use the centroid and pointer location as the reference points for the gesture.
+#if DEBUG_GESTURES
+            ALOGD("Gestures: Using centroid as reference for MULTITOUCH, "
+                    "settle time remaining %0.3fms", (mPointerGesture.firstTouchTime
+                            + mConfig.pointerGestureMultitouchSettleInterval - when)
+                            * 0.000001f);
+#endif
+            mCurrentRawPointerData.getCentroidOfTouchingPointers(
+                    &mPointerGesture.referenceTouchX,
+                    &mPointerGesture.referenceTouchY);
+            mPointerController->getPosition(&mPointerGesture.referenceGestureX,
+                    &mPointerGesture.referenceGestureY);
+        }
+
+        // Clear the reference deltas for fingers not yet included in the reference calculation.
+        for (BitSet32 idBits(mCurrentFingerIdBits.value
+                & ~mPointerGesture.referenceIdBits.value); !idBits.isEmpty(); ) {
+            uint32_t id = idBits.clearFirstMarkedBit();
+            mPointerGesture.referenceDeltas[id].dx = 0;
+            mPointerGesture.referenceDeltas[id].dy = 0;
+        }
+        mPointerGesture.referenceIdBits = mCurrentFingerIdBits;
+
+        // Add delta for all fingers and calculate a common movement delta.
+        float commonDeltaX = 0, commonDeltaY = 0;
+        BitSet32 commonIdBits(mLastFingerIdBits.value
+                & mCurrentFingerIdBits.value);
+        for (BitSet32 idBits(commonIdBits); !idBits.isEmpty(); ) {
+            bool first = (idBits == commonIdBits);
+            uint32_t id = idBits.clearFirstMarkedBit();
+            const RawPointerData::Pointer& cpd = mCurrentRawPointerData.pointerForId(id);
+            const RawPointerData::Pointer& lpd = mLastRawPointerData.pointerForId(id);
+            PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
+            delta.dx += cpd.x - lpd.x;
+            delta.dy += cpd.y - lpd.y;
+
+            if (first) {
+                commonDeltaX = delta.dx;
+                commonDeltaY = delta.dy;
+            } else {
+                commonDeltaX = calculateCommonVector(commonDeltaX, delta.dx);
+                commonDeltaY = calculateCommonVector(commonDeltaY, delta.dy);
+            }
+        }
+
+        // Consider transitions from PRESS to SWIPE or MULTITOUCH.
+        if (mPointerGesture.currentGestureMode == PointerGesture::PRESS) {
+            float dist[MAX_POINTER_ID + 1];
+            int32_t distOverThreshold = 0;
+            for (BitSet32 idBits(mPointerGesture.referenceIdBits); !idBits.isEmpty(); ) {
+                uint32_t id = idBits.clearFirstMarkedBit();
+                PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
+                dist[id] = hypotf(delta.dx * mPointerXZoomScale,
+                        delta.dy * mPointerYZoomScale);
+                if (dist[id] > mConfig.pointerGestureMultitouchMinDistance) {
+                    distOverThreshold += 1;
+                }
+            }
+
+            // Only transition when at least two pointers have moved further than
+            // the minimum distance threshold.
+            if (distOverThreshold >= 2) {
+                if (currentFingerCount > 2) {
+                    // There are more than two pointers, switch to FREEFORM.
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: PRESS transitioned to FREEFORM, number of pointers %d > 2",
+                            currentFingerCount);
+#endif
+                    *outCancelPreviousGesture = true;
+                    mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
+                } else {
+                    // There are exactly two pointers.
+                    BitSet32 idBits(mCurrentFingerIdBits);
+                    uint32_t id1 = idBits.clearFirstMarkedBit();
+                    uint32_t id2 = idBits.firstMarkedBit();
+                    const RawPointerData::Pointer& p1 = mCurrentRawPointerData.pointerForId(id1);
+                    const RawPointerData::Pointer& p2 = mCurrentRawPointerData.pointerForId(id2);
+                    float mutualDistance = distance(p1.x, p1.y, p2.x, p2.y);
+                    if (mutualDistance > mPointerGestureMaxSwipeWidth) {
+                        // There are two pointers but they are too far apart for a SWIPE,
+                        // switch to FREEFORM.
+#if DEBUG_GESTURES
+                        ALOGD("Gestures: PRESS transitioned to FREEFORM, distance %0.3f > %0.3f",
+                                mutualDistance, mPointerGestureMaxSwipeWidth);
+#endif
+                        *outCancelPreviousGesture = true;
+                        mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
+                    } else {
+                        // There are two pointers.  Wait for both pointers to start moving
+                        // before deciding whether this is a SWIPE or FREEFORM gesture.
+                        float dist1 = dist[id1];
+                        float dist2 = dist[id2];
+                        if (dist1 >= mConfig.pointerGestureMultitouchMinDistance
+                                && dist2 >= mConfig.pointerGestureMultitouchMinDistance) {
+                            // Calculate the dot product of the displacement vectors.
+                            // When the vectors are oriented in approximately the same direction,
+                            // the angle betweeen them is near zero and the cosine of the angle
+                            // approches 1.0.  Recall that dot(v1, v2) = cos(angle) * mag(v1) * mag(v2).
+                            PointerGesture::Delta& delta1 = mPointerGesture.referenceDeltas[id1];
+                            PointerGesture::Delta& delta2 = mPointerGesture.referenceDeltas[id2];
+                            float dx1 = delta1.dx * mPointerXZoomScale;
+                            float dy1 = delta1.dy * mPointerYZoomScale;
+                            float dx2 = delta2.dx * mPointerXZoomScale;
+                            float dy2 = delta2.dy * mPointerYZoomScale;
+                            float dot = dx1 * dx2 + dy1 * dy2;
+                            float cosine = dot / (dist1 * dist2); // denominator always > 0
+                            if (cosine >= mConfig.pointerGestureSwipeTransitionAngleCosine) {
+                                // Pointers are moving in the same direction.  Switch to SWIPE.
+#if DEBUG_GESTURES
+                                ALOGD("Gestures: PRESS transitioned to SWIPE, "
+                                        "dist1 %0.3f >= %0.3f, dist2 %0.3f >= %0.3f, "
+                                        "cosine %0.3f >= %0.3f",
+                                        dist1, mConfig.pointerGestureMultitouchMinDistance,
+                                        dist2, mConfig.pointerGestureMultitouchMinDistance,
+                                        cosine, mConfig.pointerGestureSwipeTransitionAngleCosine);
+#endif
+                                mPointerGesture.currentGestureMode = PointerGesture::SWIPE;
+                            } else {
+                                // Pointers are moving in different directions.  Switch to FREEFORM.
+#if DEBUG_GESTURES
+                                ALOGD("Gestures: PRESS transitioned to FREEFORM, "
+                                        "dist1 %0.3f >= %0.3f, dist2 %0.3f >= %0.3f, "
+                                        "cosine %0.3f < %0.3f",
+                                        dist1, mConfig.pointerGestureMultitouchMinDistance,
+                                        dist2, mConfig.pointerGestureMultitouchMinDistance,
+                                        cosine, mConfig.pointerGestureSwipeTransitionAngleCosine);
+#endif
+                                *outCancelPreviousGesture = true;
+                                mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
+                            }
+                        }
+                    }
+                }
+            }
+        } else if (mPointerGesture.currentGestureMode == PointerGesture::SWIPE) {
+            // Switch from SWIPE to FREEFORM if additional pointers go down.
+            // Cancel previous gesture.
+            if (currentFingerCount > 2) {
+#if DEBUG_GESTURES
+                ALOGD("Gestures: SWIPE transitioned to FREEFORM, number of pointers %d > 2",
+                        currentFingerCount);
+#endif
+                *outCancelPreviousGesture = true;
+                mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
+            }
+        }
+
+        // Move the reference points based on the overall group motion of the fingers
+        // except in PRESS mode while waiting for a transition to occur.
+        if (mPointerGesture.currentGestureMode != PointerGesture::PRESS
+                && (commonDeltaX || commonDeltaY)) {
+            for (BitSet32 idBits(mPointerGesture.referenceIdBits); !idBits.isEmpty(); ) {
+                uint32_t id = idBits.clearFirstMarkedBit();
+                PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
+                delta.dx = 0;
+                delta.dy = 0;
+            }
+
+            mPointerGesture.referenceTouchX += commonDeltaX;
+            mPointerGesture.referenceTouchY += commonDeltaY;
+
+            commonDeltaX *= mPointerXMovementScale;
+            commonDeltaY *= mPointerYMovementScale;
+
+            rotateDelta(mSurfaceOrientation, &commonDeltaX, &commonDeltaY);
+            mPointerVelocityControl.move(when, &commonDeltaX, &commonDeltaY);
+
+            mPointerGesture.referenceGestureX += commonDeltaX;
+            mPointerGesture.referenceGestureY += commonDeltaY;
+        }
+
+        // Report gestures.
+        if (mPointerGesture.currentGestureMode == PointerGesture::PRESS
+                || mPointerGesture.currentGestureMode == PointerGesture::SWIPE) {
+            // PRESS or SWIPE mode.
+#if DEBUG_GESTURES
+            ALOGD("Gestures: PRESS or SWIPE activeTouchId=%d,"
+                    "activeGestureId=%d, currentTouchPointerCount=%d",
+                    activeTouchId, mPointerGesture.activeGestureId, currentFingerCount);
+#endif
+            ALOG_ASSERT(mPointerGesture.activeGestureId >= 0);
+
+            mPointerGesture.currentGestureIdBits.clear();
+            mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
+            mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
+            mPointerGesture.currentGestureProperties[0].clear();
+            mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
+            mPointerGesture.currentGestureProperties[0].toolType =
+                    AMOTION_EVENT_TOOL_TYPE_FINGER;
+            mPointerGesture.currentGestureCoords[0].clear();
+            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X,
+                    mPointerGesture.referenceGestureX);
+            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y,
+                    mPointerGesture.referenceGestureY);
+            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
+        } else if (mPointerGesture.currentGestureMode == PointerGesture::FREEFORM) {
+            // FREEFORM mode.
+#if DEBUG_GESTURES
+            ALOGD("Gestures: FREEFORM activeTouchId=%d,"
+                    "activeGestureId=%d, currentTouchPointerCount=%d",
+                    activeTouchId, mPointerGesture.activeGestureId, currentFingerCount);
+#endif
+            ALOG_ASSERT(mPointerGesture.activeGestureId >= 0);
+
+            mPointerGesture.currentGestureIdBits.clear();
+
+            BitSet32 mappedTouchIdBits;
+            BitSet32 usedGestureIdBits;
+            if (mPointerGesture.lastGestureMode != PointerGesture::FREEFORM) {
+                // Initially, assign the active gesture id to the active touch point
+                // if there is one.  No other touch id bits are mapped yet.
+                if (!*outCancelPreviousGesture) {
+                    mappedTouchIdBits.markBit(activeTouchId);
+                    usedGestureIdBits.markBit(mPointerGesture.activeGestureId);
+                    mPointerGesture.freeformTouchToGestureIdMap[activeTouchId] =
+                            mPointerGesture.activeGestureId;
+                } else {
+                    mPointerGesture.activeGestureId = -1;
+                }
+            } else {
+                // Otherwise, assume we mapped all touches from the previous frame.
+                // Reuse all mappings that are still applicable.
+                mappedTouchIdBits.value = mLastFingerIdBits.value
+                        & mCurrentFingerIdBits.value;
+                usedGestureIdBits = mPointerGesture.lastGestureIdBits;
+
+                // Check whether we need to choose a new active gesture id because the
+                // current went went up.
+                for (BitSet32 upTouchIdBits(mLastFingerIdBits.value
+                        & ~mCurrentFingerIdBits.value);
+                        !upTouchIdBits.isEmpty(); ) {
+                    uint32_t upTouchId = upTouchIdBits.clearFirstMarkedBit();
+                    uint32_t upGestureId = mPointerGesture.freeformTouchToGestureIdMap[upTouchId];
+                    if (upGestureId == uint32_t(mPointerGesture.activeGestureId)) {
+                        mPointerGesture.activeGestureId = -1;
+                        break;
+                    }
+                }
+            }
+
+#if DEBUG_GESTURES
+            ALOGD("Gestures: FREEFORM follow up "
+                    "mappedTouchIdBits=0x%08x, usedGestureIdBits=0x%08x, "
+                    "activeGestureId=%d",
+                    mappedTouchIdBits.value, usedGestureIdBits.value,
+                    mPointerGesture.activeGestureId);
+#endif
+
+            BitSet32 idBits(mCurrentFingerIdBits);
+            for (uint32_t i = 0; i < currentFingerCount; i++) {
+                uint32_t touchId = idBits.clearFirstMarkedBit();
+                uint32_t gestureId;
+                if (!mappedTouchIdBits.hasBit(touchId)) {
+                    gestureId = usedGestureIdBits.markFirstUnmarkedBit();
+                    mPointerGesture.freeformTouchToGestureIdMap[touchId] = gestureId;
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: FREEFORM "
+                            "new mapping for touch id %d -> gesture id %d",
+                            touchId, gestureId);
+#endif
+                } else {
+                    gestureId = mPointerGesture.freeformTouchToGestureIdMap[touchId];
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: FREEFORM "
+                            "existing mapping for touch id %d -> gesture id %d",
+                            touchId, gestureId);
+#endif
+                }
+                mPointerGesture.currentGestureIdBits.markBit(gestureId);
+                mPointerGesture.currentGestureIdToIndex[gestureId] = i;
+
+                const RawPointerData::Pointer& pointer =
+                        mCurrentRawPointerData.pointerForId(touchId);
+                float deltaX = (pointer.x - mPointerGesture.referenceTouchX)
+                        * mPointerXZoomScale;
+                float deltaY = (pointer.y - mPointerGesture.referenceTouchY)
+                        * mPointerYZoomScale;
+                rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
+
+                mPointerGesture.currentGestureProperties[i].clear();
+                mPointerGesture.currentGestureProperties[i].id = gestureId;
+                mPointerGesture.currentGestureProperties[i].toolType =
+                        AMOTION_EVENT_TOOL_TYPE_FINGER;
+                mPointerGesture.currentGestureCoords[i].clear();
+                mPointerGesture.currentGestureCoords[i].setAxisValue(
+                        AMOTION_EVENT_AXIS_X, mPointerGesture.referenceGestureX + deltaX);
+                mPointerGesture.currentGestureCoords[i].setAxisValue(
+                        AMOTION_EVENT_AXIS_Y, mPointerGesture.referenceGestureY + deltaY);
+                mPointerGesture.currentGestureCoords[i].setAxisValue(
+                        AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
+            }
+
+            if (mPointerGesture.activeGestureId < 0) {
+                mPointerGesture.activeGestureId =
+                        mPointerGesture.currentGestureIdBits.firstMarkedBit();
+#if DEBUG_GESTURES
+                ALOGD("Gestures: FREEFORM new "
+                        "activeGestureId=%d", mPointerGesture.activeGestureId);
+#endif
+            }
+        }
+    }
+
+    mPointerController->setButtonState(mCurrentButtonState);
+
+#if DEBUG_GESTURES
+    ALOGD("Gestures: finishPreviousGesture=%s, cancelPreviousGesture=%s, "
+            "currentGestureMode=%d, currentGestureIdBits=0x%08x, "
+            "lastGestureMode=%d, lastGestureIdBits=0x%08x",
+            toString(*outFinishPreviousGesture), toString(*outCancelPreviousGesture),
+            mPointerGesture.currentGestureMode, mPointerGesture.currentGestureIdBits.value,
+            mPointerGesture.lastGestureMode, mPointerGesture.lastGestureIdBits.value);
+    for (BitSet32 idBits = mPointerGesture.currentGestureIdBits; !idBits.isEmpty(); ) {
+        uint32_t id = idBits.clearFirstMarkedBit();
+        uint32_t index = mPointerGesture.currentGestureIdToIndex[id];
+        const PointerProperties& properties = mPointerGesture.currentGestureProperties[index];
+        const PointerCoords& coords = mPointerGesture.currentGestureCoords[index];
+        ALOGD("  currentGesture[%d]: index=%d, toolType=%d, "
+                "x=%0.3f, y=%0.3f, pressure=%0.3f",
+                id, index, properties.toolType,
+                coords.getAxisValue(AMOTION_EVENT_AXIS_X),
+                coords.getAxisValue(AMOTION_EVENT_AXIS_Y),
+                coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
+    }
+    for (BitSet32 idBits = mPointerGesture.lastGestureIdBits; !idBits.isEmpty(); ) {
+        uint32_t id = idBits.clearFirstMarkedBit();
+        uint32_t index = mPointerGesture.lastGestureIdToIndex[id];
+        const PointerProperties& properties = mPointerGesture.lastGestureProperties[index];
+        const PointerCoords& coords = mPointerGesture.lastGestureCoords[index];
+        ALOGD("  lastGesture[%d]: index=%d, toolType=%d, "
+                "x=%0.3f, y=%0.3f, pressure=%0.3f",
+                id, index, properties.toolType,
+                coords.getAxisValue(AMOTION_EVENT_AXIS_X),
+                coords.getAxisValue(AMOTION_EVENT_AXIS_Y),
+                coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
+    }
+#endif
+    return true;
+}
+
+void TouchInputMapper::dispatchPointerStylus(nsecs_t when, uint32_t policyFlags) {
+    mPointerSimple.currentCoords.clear();
+    mPointerSimple.currentProperties.clear();
+
+    bool down, hovering;
+    if (!mCurrentStylusIdBits.isEmpty()) {
+        uint32_t id = mCurrentStylusIdBits.firstMarkedBit();
+        uint32_t index = mCurrentCookedPointerData.idToIndex[id];
+        float x = mCurrentCookedPointerData.pointerCoords[index].getX();
+        float y = mCurrentCookedPointerData.pointerCoords[index].getY();
+        mPointerController->setPosition(x, y);
+
+        hovering = mCurrentCookedPointerData.hoveringIdBits.hasBit(id);
+        down = !hovering;
+
+        mPointerController->getPosition(&x, &y);
+        mPointerSimple.currentCoords.copyFrom(mCurrentCookedPointerData.pointerCoords[index]);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        mPointerSimple.currentProperties.id = 0;
+        mPointerSimple.currentProperties.toolType =
+                mCurrentCookedPointerData.pointerProperties[index].toolType;
+    } else {
+        down = false;
+        hovering = false;
+    }
+
+    dispatchPointerSimple(when, policyFlags, down, hovering);
+}
+
+void TouchInputMapper::abortPointerStylus(nsecs_t when, uint32_t policyFlags) {
+    abortPointerSimple(when, policyFlags);
+}
+
+void TouchInputMapper::dispatchPointerMouse(nsecs_t when, uint32_t policyFlags) {
+    mPointerSimple.currentCoords.clear();
+    mPointerSimple.currentProperties.clear();
+
+    bool down, hovering;
+    if (!mCurrentMouseIdBits.isEmpty()) {
+        uint32_t id = mCurrentMouseIdBits.firstMarkedBit();
+        uint32_t currentIndex = mCurrentRawPointerData.idToIndex[id];
+        if (mLastMouseIdBits.hasBit(id)) {
+            uint32_t lastIndex = mCurrentRawPointerData.idToIndex[id];
+            float deltaX = (mCurrentRawPointerData.pointers[currentIndex].x
+                    - mLastRawPointerData.pointers[lastIndex].x)
+                    * mPointerXMovementScale;
+            float deltaY = (mCurrentRawPointerData.pointers[currentIndex].y
+                    - mLastRawPointerData.pointers[lastIndex].y)
+                    * mPointerYMovementScale;
+
+            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
+            mPointerVelocityControl.move(when, &deltaX, &deltaY);
+
+            mPointerController->move(deltaX, deltaY);
+        } else {
+            mPointerVelocityControl.reset();
+        }
+
+        down = isPointerDown(mCurrentButtonState);
+        hovering = !down;
+
+        float x, y;
+        mPointerController->getPosition(&x, &y);
+        mPointerSimple.currentCoords.copyFrom(
+                mCurrentCookedPointerData.pointerCoords[currentIndex]);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
+                hovering ? 0.0f : 1.0f);
+        mPointerSimple.currentProperties.id = 0;
+        mPointerSimple.currentProperties.toolType =
+                mCurrentCookedPointerData.pointerProperties[currentIndex].toolType;
+    } else {
+        mPointerVelocityControl.reset();
+
+        down = false;
+        hovering = false;
+    }
+
+    dispatchPointerSimple(when, policyFlags, down, hovering);
+}
+
+void TouchInputMapper::abortPointerMouse(nsecs_t when, uint32_t policyFlags) {
+    abortPointerSimple(when, policyFlags);
+
+    mPointerVelocityControl.reset();
+}
+
+void TouchInputMapper::dispatchPointerSimple(nsecs_t when, uint32_t policyFlags,
+        bool down, bool hovering) {
+    int32_t metaState = getContext()->getGlobalMetaState();
+
+    if (mPointerController != NULL) {
+        if (down || hovering) {
+            mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
+            mPointerController->clearSpots();
+            mPointerController->setButtonState(mCurrentButtonState);
+            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
+        } else if (!down && !hovering && (mPointerSimple.down || mPointerSimple.hovering)) {
+            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+        }
+    }
+
+    if (mPointerSimple.down && !down) {
+        mPointerSimple.down = false;
+
+        // Send up.
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                 AMOTION_EVENT_ACTION_UP, 0, metaState, mLastButtonState, 0,
+                 mViewport.displayId,
+                 1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
+                 mOrientedXPrecision, mOrientedYPrecision,
+                 mPointerSimple.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    if (mPointerSimple.hovering && !hovering) {
+        mPointerSimple.hovering = false;
+
+        // Send hover exit.
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, metaState, mLastButtonState, 0,
+                mViewport.displayId,
+                1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
+                mOrientedXPrecision, mOrientedYPrecision,
+                mPointerSimple.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    if (down) {
+        if (!mPointerSimple.down) {
+            mPointerSimple.down = true;
+            mPointerSimple.downTime = when;
+
+            // Send down.
+            NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                    AMOTION_EVENT_ACTION_DOWN, 0, metaState, mCurrentButtonState, 0,
+                    mViewport.displayId,
+                    1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
+                    mOrientedXPrecision, mOrientedYPrecision,
+                    mPointerSimple.downTime);
+            getListener()->notifyMotion(&args);
+        }
+
+        // Send move.
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                AMOTION_EVENT_ACTION_MOVE, 0, metaState, mCurrentButtonState, 0,
+                mViewport.displayId,
+                1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
+                mOrientedXPrecision, mOrientedYPrecision,
+                mPointerSimple.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    if (hovering) {
+        if (!mPointerSimple.hovering) {
+            mPointerSimple.hovering = true;
+
+            // Send hover enter.
+            NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, metaState, mCurrentButtonState, 0,
+                    mViewport.displayId,
+                    1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
+                    mOrientedXPrecision, mOrientedYPrecision,
+                    mPointerSimple.downTime);
+            getListener()->notifyMotion(&args);
+        }
+
+        // Send hover move.
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, metaState, mCurrentButtonState, 0,
+                mViewport.displayId,
+                1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
+                mOrientedXPrecision, mOrientedYPrecision,
+                mPointerSimple.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    if (mCurrentRawVScroll || mCurrentRawHScroll) {
+        float vscroll = mCurrentRawVScroll;
+        float hscroll = mCurrentRawHScroll;
+        mWheelYVelocityControl.move(when, NULL, &vscroll);
+        mWheelXVelocityControl.move(when, &hscroll, NULL);
+
+        // Send scroll.
+        PointerCoords pointerCoords;
+        pointerCoords.copyFrom(mPointerSimple.currentCoords);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
+
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                AMOTION_EVENT_ACTION_SCROLL, 0, metaState, mCurrentButtonState, 0,
+                mViewport.displayId,
+                1, &mPointerSimple.currentProperties, &pointerCoords,
+                mOrientedXPrecision, mOrientedYPrecision,
+                mPointerSimple.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    // Save state.
+    if (down || hovering) {
+        mPointerSimple.lastCoords.copyFrom(mPointerSimple.currentCoords);
+        mPointerSimple.lastProperties.copyFrom(mPointerSimple.currentProperties);
+    } else {
+        mPointerSimple.reset();
+    }
+}
+
+void TouchInputMapper::abortPointerSimple(nsecs_t when, uint32_t policyFlags) {
+    mPointerSimple.currentCoords.clear();
+    mPointerSimple.currentProperties.clear();
+
+    dispatchPointerSimple(when, policyFlags, false, false);
+}
+
+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,
+        const PointerProperties* properties, const PointerCoords* coords,
+        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;
+    while (!idBits.isEmpty()) {
+        uint32_t id = idBits.clearFirstMarkedBit();
+        uint32_t index = idToIndex[id];
+        pointerProperties[pointerCount].copyFrom(properties[index]);
+        pointerCoords[pointerCount].copyFrom(coords[index]);
+
+        if (changedId >= 0 && id == uint32_t(changedId)) {
+            action |= pointerCount << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
+        }
+
+        pointerCount += 1;
+    }
+
+    ALOG_ASSERT(pointerCount != 0);
+
+    if (changedId >= 0 && pointerCount == 1) {
+        // Replace initial down and final up action.
+        // We can compare the action without masking off the changed pointer index
+        // because we know the index is 0.
+        if (action == AMOTION_EVENT_ACTION_POINTER_DOWN) {
+            action = AMOTION_EVENT_ACTION_DOWN;
+        } else if (action == AMOTION_EVENT_ACTION_POINTER_UP) {
+            action = AMOTION_EVENT_ACTION_UP;
+        } else {
+            // Can't happen.
+            ALOG_ASSERT(false);
+        }
+    }
+
+    NotifyMotionArgs args(when, getDeviceId(), source, policyFlags,
+            action, flags, metaState, buttonState, edgeFlags,
+            mViewport.displayId, pointerCount, pointerProperties, pointerCoords,
+            xPrecision, yPrecision, downTime);
+    getListener()->notifyMotion(&args);
+}
+
+bool TouchInputMapper::updateMovedPointers(const PointerProperties* inProperties,
+        const PointerCoords* inCoords, const uint32_t* inIdToIndex,
+        PointerProperties* outProperties, PointerCoords* outCoords, const uint32_t* outIdToIndex,
+        BitSet32 idBits) const {
+    bool changed = false;
+    while (!idBits.isEmpty()) {
+        uint32_t id = idBits.clearFirstMarkedBit();
+        uint32_t inIndex = inIdToIndex[id];
+        uint32_t outIndex = outIdToIndex[id];
+
+        const PointerProperties& curInProperties = inProperties[inIndex];
+        const PointerCoords& curInCoords = inCoords[inIndex];
+        PointerProperties& curOutProperties = outProperties[outIndex];
+        PointerCoords& curOutCoords = outCoords[outIndex];
+
+        if (curInProperties != curOutProperties) {
+            curOutProperties.copyFrom(curInProperties);
+            changed = true;
+        }
+
+        if (curInCoords != curOutCoords) {
+            curOutCoords.copyFrom(curInCoords);
+            changed = true;
+        }
+    }
+    return changed;
+}
+
+void TouchInputMapper::fadePointer() {
+    if (mPointerController != NULL) {
+        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+    }
+}
+
+bool TouchInputMapper::isPointInsideSurface(int32_t x, int32_t y) {
+    return x >= mRawPointerAxes.x.minValue && x <= mRawPointerAxes.x.maxValue
+            && y >= mRawPointerAxes.y.minValue && y <= mRawPointerAxes.y.maxValue;
+}
+
+const TouchInputMapper::VirtualKey* TouchInputMapper::findVirtualKeyHit(
+        int32_t x, int32_t y) {
+    size_t numVirtualKeys = mVirtualKeys.size();
+    for (size_t i = 0; i < numVirtualKeys; i++) {
+        const VirtualKey& virtualKey = mVirtualKeys[i];
+
+#if DEBUG_VIRTUAL_KEYS
+        ALOGD("VirtualKeys: Hit test (%d, %d): keyCode=%d, scanCode=%d, "
+                "left=%d, top=%d, right=%d, bottom=%d",
+                x, y,
+                virtualKey.keyCode, virtualKey.scanCode,
+                virtualKey.hitLeft, virtualKey.hitTop,
+                virtualKey.hitRight, virtualKey.hitBottom);
+#endif
+
+        if (virtualKey.isHit(x, y)) {
+            return & virtualKey;
+        }
+    }
+
+    return NULL;
+}
+
+void TouchInputMapper::assignPointerIds() {
+    uint32_t currentPointerCount = mCurrentRawPointerData.pointerCount;
+    uint32_t lastPointerCount = mLastRawPointerData.pointerCount;
+
+    mCurrentRawPointerData.clearIdBits();
+
+    if (currentPointerCount == 0) {
+        // No pointers to assign.
+        return;
+    }
+
+    if (lastPointerCount == 0) {
+        // All pointers are new.
+        for (uint32_t i = 0; i < currentPointerCount; i++) {
+            uint32_t id = i;
+            mCurrentRawPointerData.pointers[i].id = id;
+            mCurrentRawPointerData.idToIndex[id] = i;
+            mCurrentRawPointerData.markIdBit(id, mCurrentRawPointerData.isHovering(i));
+        }
+        return;
+    }
+
+    if (currentPointerCount == 1 && lastPointerCount == 1
+            && mCurrentRawPointerData.pointers[0].toolType
+                    == mLastRawPointerData.pointers[0].toolType) {
+        // Only one pointer and no change in count so it must have the same id as before.
+        uint32_t id = mLastRawPointerData.pointers[0].id;
+        mCurrentRawPointerData.pointers[0].id = id;
+        mCurrentRawPointerData.idToIndex[id] = 0;
+        mCurrentRawPointerData.markIdBit(id, mCurrentRawPointerData.isHovering(0));
+        return;
+    }
+
+    // General case.
+    // We build a heap of squared euclidean distances between current and last pointers
+    // associated with the current and last pointer indices.  Then, we find the best
+    // match (by distance) for each current pointer.
+    // The pointers must have the same tool type but it is possible for them to
+    // transition from hovering to touching or vice-versa while retaining the same id.
+    PointerDistanceHeapElement heap[MAX_POINTERS * MAX_POINTERS];
+
+    uint32_t heapSize = 0;
+    for (uint32_t currentPointerIndex = 0; currentPointerIndex < currentPointerCount;
+            currentPointerIndex++) {
+        for (uint32_t lastPointerIndex = 0; lastPointerIndex < lastPointerCount;
+                lastPointerIndex++) {
+            const RawPointerData::Pointer& currentPointer =
+                    mCurrentRawPointerData.pointers[currentPointerIndex];
+            const RawPointerData::Pointer& lastPointer =
+                    mLastRawPointerData.pointers[lastPointerIndex];
+            if (currentPointer.toolType == lastPointer.toolType) {
+                int64_t deltaX = currentPointer.x - lastPointer.x;
+                int64_t deltaY = currentPointer.y - lastPointer.y;
+
+                uint64_t distance = uint64_t(deltaX * deltaX + deltaY * deltaY);
+
+                // Insert new element into the heap (sift up).
+                heap[heapSize].currentPointerIndex = currentPointerIndex;
+                heap[heapSize].lastPointerIndex = lastPointerIndex;
+                heap[heapSize].distance = distance;
+                heapSize += 1;
+            }
+        }
+    }
+
+    // Heapify
+    for (uint32_t startIndex = heapSize / 2; startIndex != 0; ) {
+        startIndex -= 1;
+        for (uint32_t parentIndex = startIndex; ;) {
+            uint32_t childIndex = parentIndex * 2 + 1;
+            if (childIndex >= heapSize) {
+                break;
+            }
+
+            if (childIndex + 1 < heapSize
+                    && heap[childIndex + 1].distance < heap[childIndex].distance) {
+                childIndex += 1;
+            }
+
+            if (heap[parentIndex].distance <= heap[childIndex].distance) {
+                break;
+            }
+
+            swap(heap[parentIndex], heap[childIndex]);
+            parentIndex = childIndex;
+        }
+    }
+
+#if DEBUG_POINTER_ASSIGNMENT
+    ALOGD("assignPointerIds - initial distance min-heap: size=%d", heapSize);
+    for (size_t i = 0; i < heapSize; i++) {
+        ALOGD("  heap[%d]: cur=%d, last=%d, distance=%lld",
+                i, heap[i].currentPointerIndex, heap[i].lastPointerIndex,
+                heap[i].distance);
+    }
+#endif
+
+    // Pull matches out by increasing order of distance.
+    // To avoid reassigning pointers that have already been matched, the loop keeps track
+    // of which last and current pointers have been matched using the matchedXXXBits variables.
+    // It also tracks the used pointer id bits.
+    BitSet32 matchedLastBits(0);
+    BitSet32 matchedCurrentBits(0);
+    BitSet32 usedIdBits(0);
+    bool first = true;
+    for (uint32_t i = min(currentPointerCount, lastPointerCount); heapSize > 0 && i > 0; i--) {
+        while (heapSize > 0) {
+            if (first) {
+                // The first time through the loop, we just consume the root element of
+                // the heap (the one with smallest distance).
+                first = false;
+            } else {
+                // Previous iterations consumed the root element of the heap.
+                // Pop root element off of the heap (sift down).
+                heap[0] = heap[heapSize];
+                for (uint32_t parentIndex = 0; ;) {
+                    uint32_t childIndex = parentIndex * 2 + 1;
+                    if (childIndex >= heapSize) {
+                        break;
+                    }
+
+                    if (childIndex + 1 < heapSize
+                            && heap[childIndex + 1].distance < heap[childIndex].distance) {
+                        childIndex += 1;
+                    }
+
+                    if (heap[parentIndex].distance <= heap[childIndex].distance) {
+                        break;
+                    }
+
+                    swap(heap[parentIndex], heap[childIndex]);
+                    parentIndex = childIndex;
+                }
+
+#if DEBUG_POINTER_ASSIGNMENT
+                ALOGD("assignPointerIds - reduced distance min-heap: size=%d", heapSize);
+                for (size_t i = 0; i < heapSize; i++) {
+                    ALOGD("  heap[%d]: cur=%d, last=%d, distance=%lld",
+                            i, heap[i].currentPointerIndex, heap[i].lastPointerIndex,
+                            heap[i].distance);
+                }
+#endif
+            }
+
+            heapSize -= 1;
+
+            uint32_t currentPointerIndex = heap[0].currentPointerIndex;
+            if (matchedCurrentBits.hasBit(currentPointerIndex)) continue; // already matched
+
+            uint32_t lastPointerIndex = heap[0].lastPointerIndex;
+            if (matchedLastBits.hasBit(lastPointerIndex)) continue; // already matched
+
+            matchedCurrentBits.markBit(currentPointerIndex);
+            matchedLastBits.markBit(lastPointerIndex);
+
+            uint32_t id = mLastRawPointerData.pointers[lastPointerIndex].id;
+            mCurrentRawPointerData.pointers[currentPointerIndex].id = id;
+            mCurrentRawPointerData.idToIndex[id] = currentPointerIndex;
+            mCurrentRawPointerData.markIdBit(id,
+                    mCurrentRawPointerData.isHovering(currentPointerIndex));
+            usedIdBits.markBit(id);
+
+#if DEBUG_POINTER_ASSIGNMENT
+            ALOGD("assignPointerIds - matched: cur=%d, last=%d, id=%d, distance=%lld",
+                    lastPointerIndex, currentPointerIndex, id, heap[0].distance);
+#endif
+            break;
+        }
+    }
+
+    // Assign fresh ids to pointers that were not matched in the process.
+    for (uint32_t i = currentPointerCount - matchedCurrentBits.count(); i != 0; i--) {
+        uint32_t currentPointerIndex = matchedCurrentBits.markFirstUnmarkedBit();
+        uint32_t id = usedIdBits.markFirstUnmarkedBit();
+
+        mCurrentRawPointerData.pointers[currentPointerIndex].id = id;
+        mCurrentRawPointerData.idToIndex[id] = currentPointerIndex;
+        mCurrentRawPointerData.markIdBit(id,
+                mCurrentRawPointerData.isHovering(currentPointerIndex));
+
+#if DEBUG_POINTER_ASSIGNMENT
+        ALOGD("assignPointerIds - assigned: cur=%d, id=%d",
+                currentPointerIndex, id);
+#endif
+    }
+}
+
+int32_t TouchInputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
+    if (mCurrentVirtualKey.down && mCurrentVirtualKey.keyCode == keyCode) {
+        return AKEY_STATE_VIRTUAL;
+    }
+
+    size_t numVirtualKeys = mVirtualKeys.size();
+    for (size_t i = 0; i < numVirtualKeys; i++) {
+        const VirtualKey& virtualKey = mVirtualKeys[i];
+        if (virtualKey.keyCode == keyCode) {
+            return AKEY_STATE_UP;
+        }
+    }
+
+    return AKEY_STATE_UNKNOWN;
+}
+
+int32_t TouchInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
+    if (mCurrentVirtualKey.down && mCurrentVirtualKey.scanCode == scanCode) {
+        return AKEY_STATE_VIRTUAL;
+    }
+
+    size_t numVirtualKeys = mVirtualKeys.size();
+    for (size_t i = 0; i < numVirtualKeys; i++) {
+        const VirtualKey& virtualKey = mVirtualKeys[i];
+        if (virtualKey.scanCode == scanCode) {
+            return AKEY_STATE_UP;
+        }
+    }
+
+    return AKEY_STATE_UNKNOWN;
+}
+
+bool TouchInputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+        const int32_t* keyCodes, uint8_t* outFlags) {
+    size_t numVirtualKeys = mVirtualKeys.size();
+    for (size_t i = 0; i < numVirtualKeys; i++) {
+        const VirtualKey& virtualKey = mVirtualKeys[i];
+
+        for (size_t i = 0; i < numCodes; i++) {
+            if (virtualKey.keyCode == keyCodes[i]) {
+                outFlags[i] = 1;
+            }
+        }
+    }
+
+    return true;
+}
+
+
+// --- SingleTouchInputMapper ---
+
+SingleTouchInputMapper::SingleTouchInputMapper(InputDevice* device) :
+        TouchInputMapper(device) {
+}
+
+SingleTouchInputMapper::~SingleTouchInputMapper() {
+}
+
+void SingleTouchInputMapper::reset(nsecs_t when) {
+    mSingleTouchMotionAccumulator.reset(getDevice());
+
+    TouchInputMapper::reset(when);
+}
+
+void SingleTouchInputMapper::process(const RawEvent* rawEvent) {
+    TouchInputMapper::process(rawEvent);
+
+    mSingleTouchMotionAccumulator.process(rawEvent);
+}
+
+void SingleTouchInputMapper::syncTouch(nsecs_t when, bool* outHavePointerIds) {
+    if (mTouchButtonAccumulator.isToolActive()) {
+        mCurrentRawPointerData.pointerCount = 1;
+        mCurrentRawPointerData.idToIndex[0] = 0;
+
+        bool isHovering = mTouchButtonAccumulator.getToolType() != AMOTION_EVENT_TOOL_TYPE_MOUSE
+                && (mTouchButtonAccumulator.isHovering()
+                        || (mRawPointerAxes.pressure.valid
+                                && mSingleTouchMotionAccumulator.getAbsolutePressure() <= 0));
+        mCurrentRawPointerData.markIdBit(0, isHovering);
+
+        RawPointerData::Pointer& outPointer = mCurrentRawPointerData.pointers[0];
+        outPointer.id = 0;
+        outPointer.x = mSingleTouchMotionAccumulator.getAbsoluteX();
+        outPointer.y = mSingleTouchMotionAccumulator.getAbsoluteY();
+        outPointer.pressure = mSingleTouchMotionAccumulator.getAbsolutePressure();
+        outPointer.touchMajor = 0;
+        outPointer.touchMinor = 0;
+        outPointer.toolMajor = mSingleTouchMotionAccumulator.getAbsoluteToolWidth();
+        outPointer.toolMinor = mSingleTouchMotionAccumulator.getAbsoluteToolWidth();
+        outPointer.orientation = 0;
+        outPointer.distance = mSingleTouchMotionAccumulator.getAbsoluteDistance();
+        outPointer.tiltX = mSingleTouchMotionAccumulator.getAbsoluteTiltX();
+        outPointer.tiltY = mSingleTouchMotionAccumulator.getAbsoluteTiltY();
+        outPointer.toolType = mTouchButtonAccumulator.getToolType();
+        if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
+            outPointer.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+        }
+        outPointer.isHovering = isHovering;
+    }
+}
+
+void SingleTouchInputMapper::configureRawPointerAxes() {
+    TouchInputMapper::configureRawPointerAxes();
+
+    getAbsoluteAxisInfo(ABS_X, &mRawPointerAxes.x);
+    getAbsoluteAxisInfo(ABS_Y, &mRawPointerAxes.y);
+    getAbsoluteAxisInfo(ABS_PRESSURE, &mRawPointerAxes.pressure);
+    getAbsoluteAxisInfo(ABS_TOOL_WIDTH, &mRawPointerAxes.toolMajor);
+    getAbsoluteAxisInfo(ABS_DISTANCE, &mRawPointerAxes.distance);
+    getAbsoluteAxisInfo(ABS_TILT_X, &mRawPointerAxes.tiltX);
+    getAbsoluteAxisInfo(ABS_TILT_Y, &mRawPointerAxes.tiltY);
+}
+
+bool SingleTouchInputMapper::hasStylus() const {
+    return mTouchButtonAccumulator.hasStylus();
+}
+
+
+// --- MultiTouchInputMapper ---
+
+MultiTouchInputMapper::MultiTouchInputMapper(InputDevice* device) :
+        TouchInputMapper(device) {
+}
+
+MultiTouchInputMapper::~MultiTouchInputMapper() {
+}
+
+void MultiTouchInputMapper::reset(nsecs_t when) {
+    mMultiTouchMotionAccumulator.reset(getDevice());
+
+    mPointerIdBits.clear();
+
+    TouchInputMapper::reset(when);
+}
+
+void MultiTouchInputMapper::process(const RawEvent* rawEvent) {
+    TouchInputMapper::process(rawEvent);
+
+    mMultiTouchMotionAccumulator.process(rawEvent);
+}
+
+void MultiTouchInputMapper::syncTouch(nsecs_t when, bool* outHavePointerIds) {
+    size_t inCount = mMultiTouchMotionAccumulator.getSlotCount();
+    size_t outCount = 0;
+    BitSet32 newPointerIdBits;
+
+    for (size_t inIndex = 0; inIndex < inCount; inIndex++) {
+        const MultiTouchMotionAccumulator::Slot* inSlot =
+                mMultiTouchMotionAccumulator.getSlot(inIndex);
+        if (!inSlot->isInUse()) {
+            continue;
+        }
+
+        if (outCount >= MAX_POINTERS) {
+#if DEBUG_POINTERS
+            ALOGD("MultiTouch device %s emitted more than maximum of %d pointers; "
+                    "ignoring the rest.",
+                    getDeviceName().string(), MAX_POINTERS);
+#endif
+            break; // too many fingers!
+        }
+
+        RawPointerData::Pointer& outPointer = mCurrentRawPointerData.pointers[outCount];
+        outPointer.x = inSlot->getX();
+        outPointer.y = inSlot->getY();
+        outPointer.pressure = inSlot->getPressure();
+        outPointer.touchMajor = inSlot->getTouchMajor();
+        outPointer.touchMinor = inSlot->getTouchMinor();
+        outPointer.toolMajor = inSlot->getToolMajor();
+        outPointer.toolMinor = inSlot->getToolMinor();
+        outPointer.orientation = inSlot->getOrientation();
+        outPointer.distance = inSlot->getDistance();
+        outPointer.tiltX = 0;
+        outPointer.tiltY = 0;
+
+        outPointer.toolType = inSlot->getToolType();
+        if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
+            outPointer.toolType = mTouchButtonAccumulator.getToolType();
+            if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
+                outPointer.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+            }
+        }
+
+        bool isHovering = mTouchButtonAccumulator.getToolType() != AMOTION_EVENT_TOOL_TYPE_MOUSE
+                && (mTouchButtonAccumulator.isHovering()
+                        || (mRawPointerAxes.pressure.valid && inSlot->getPressure() <= 0));
+        outPointer.isHovering = isHovering;
+
+        // Assign pointer id using tracking id if available.
+        if (*outHavePointerIds) {
+            int32_t trackingId = inSlot->getTrackingId();
+            int32_t id = -1;
+            if (trackingId >= 0) {
+                for (BitSet32 idBits(mPointerIdBits); !idBits.isEmpty(); ) {
+                    uint32_t n = idBits.clearFirstMarkedBit();
+                    if (mPointerTrackingIdMap[n] == trackingId) {
+                        id = n;
+                    }
+                }
+
+                if (id < 0 && !mPointerIdBits.isFull()) {
+                    id = mPointerIdBits.markFirstUnmarkedBit();
+                    mPointerTrackingIdMap[id] = trackingId;
+                }
+            }
+            if (id < 0) {
+                *outHavePointerIds = false;
+                mCurrentRawPointerData.clearIdBits();
+                newPointerIdBits.clear();
+            } else {
+                outPointer.id = id;
+                mCurrentRawPointerData.idToIndex[id] = outCount;
+                mCurrentRawPointerData.markIdBit(id, isHovering);
+                newPointerIdBits.markBit(id);
+            }
+        }
+
+        outCount += 1;
+    }
+
+    mCurrentRawPointerData.pointerCount = outCount;
+    mPointerIdBits = newPointerIdBits;
+
+    mMultiTouchMotionAccumulator.finishSync();
+}
+
+void MultiTouchInputMapper::configureRawPointerAxes() {
+    TouchInputMapper::configureRawPointerAxes();
+
+    getAbsoluteAxisInfo(ABS_MT_POSITION_X, &mRawPointerAxes.x);
+    getAbsoluteAxisInfo(ABS_MT_POSITION_Y, &mRawPointerAxes.y);
+    getAbsoluteAxisInfo(ABS_MT_TOUCH_MAJOR, &mRawPointerAxes.touchMajor);
+    getAbsoluteAxisInfo(ABS_MT_TOUCH_MINOR, &mRawPointerAxes.touchMinor);
+    getAbsoluteAxisInfo(ABS_MT_WIDTH_MAJOR, &mRawPointerAxes.toolMajor);
+    getAbsoluteAxisInfo(ABS_MT_WIDTH_MINOR, &mRawPointerAxes.toolMinor);
+    getAbsoluteAxisInfo(ABS_MT_ORIENTATION, &mRawPointerAxes.orientation);
+    getAbsoluteAxisInfo(ABS_MT_PRESSURE, &mRawPointerAxes.pressure);
+    getAbsoluteAxisInfo(ABS_MT_DISTANCE, &mRawPointerAxes.distance);
+    getAbsoluteAxisInfo(ABS_MT_TRACKING_ID, &mRawPointerAxes.trackingId);
+    getAbsoluteAxisInfo(ABS_MT_SLOT, &mRawPointerAxes.slot);
+
+    if (mRawPointerAxes.trackingId.valid
+            && mRawPointerAxes.slot.valid
+            && mRawPointerAxes.slot.minValue == 0 && mRawPointerAxes.slot.maxValue > 0) {
+        size_t slotCount = mRawPointerAxes.slot.maxValue + 1;
+        if (slotCount > MAX_SLOTS) {
+            ALOGW("MultiTouch Device %s reported %d slots but the framework "
+                    "only supports a maximum of %d slots at this time.",
+                    getDeviceName().string(), slotCount, MAX_SLOTS);
+            slotCount = MAX_SLOTS;
+        }
+        mMultiTouchMotionAccumulator.configure(getDevice(),
+                slotCount, true /*usingSlotsProtocol*/);
+    } else {
+        mMultiTouchMotionAccumulator.configure(getDevice(),
+                MAX_POINTERS, false /*usingSlotsProtocol*/);
+    }
+}
+
+bool MultiTouchInputMapper::hasStylus() const {
+    return mMultiTouchMotionAccumulator.hasStylus()
+            || mTouchButtonAccumulator.hasStylus();
+}
+
+
+// --- JoystickInputMapper ---
+
+JoystickInputMapper::JoystickInputMapper(InputDevice* device) :
+        InputMapper(device) {
+}
+
+JoystickInputMapper::~JoystickInputMapper() {
+}
+
+uint32_t JoystickInputMapper::getSources() {
+    return AINPUT_SOURCE_JOYSTICK;
+}
+
+void JoystickInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    for (size_t i = 0; i < mAxes.size(); i++) {
+        const Axis& axis = mAxes.valueAt(i);
+        addMotionRange(axis.axisInfo.axis, axis, info);
+
+        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
+            addMotionRange(axis.axisInfo.highAxis, axis, info);
+
+        }
+    }
+}
+
+void JoystickInputMapper::addMotionRange(int32_t axisId, const Axis& axis,
+        InputDeviceInfo* info) {
+    info->addMotionRange(axisId, AINPUT_SOURCE_JOYSTICK,
+            axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
+    /* In order to ease the transition for developers from using the old axes
+     * to the newer, more semantically correct axes, we'll continue to register
+     * the old axes as duplicates of their corresponding new ones.  */
+    int32_t compatAxis = getCompatAxis(axisId);
+    if (compatAxis >= 0) {
+        info->addMotionRange(compatAxis, AINPUT_SOURCE_JOYSTICK,
+                axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
+    }
+}
+
+/* A mapping from axes the joystick actually has to the axes that should be
+ * artificially created for compatibility purposes.
+ * Returns -1 if no compatibility axis is needed. */
+int32_t JoystickInputMapper::getCompatAxis(int32_t axis) {
+    switch(axis) {
+    case AMOTION_EVENT_AXIS_LTRIGGER:
+        return AMOTION_EVENT_AXIS_BRAKE;
+    case AMOTION_EVENT_AXIS_RTRIGGER:
+        return AMOTION_EVENT_AXIS_GAS;
+    }
+    return -1;
+}
+
+void JoystickInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Joystick Input Mapper:\n");
+
+    dump.append(INDENT3 "Axes:\n");
+    size_t numAxes = mAxes.size();
+    for (size_t i = 0; i < numAxes; i++) {
+        const Axis& axis = mAxes.valueAt(i);
+        const char* label = getAxisLabel(axis.axisInfo.axis);
+        if (label) {
+            dump.appendFormat(INDENT4 "%s", label);
+        } else {
+            dump.appendFormat(INDENT4 "%d", axis.axisInfo.axis);
+        }
+        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
+            label = getAxisLabel(axis.axisInfo.highAxis);
+            if (label) {
+                dump.appendFormat(" / %s (split at %d)", label, axis.axisInfo.splitValue);
+            } else {
+                dump.appendFormat(" / %d (split at %d)", axis.axisInfo.highAxis,
+                        axis.axisInfo.splitValue);
+            }
+        } else if (axis.axisInfo.mode == AxisInfo::MODE_INVERT) {
+            dump.append(" (invert)");
+        }
+
+        dump.appendFormat(": min=%0.5f, max=%0.5f, flat=%0.5f, fuzz=%0.5f, resolution=%0.5f\n",
+                axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
+        dump.appendFormat(INDENT4 "  scale=%0.5f, offset=%0.5f, "
+                "highScale=%0.5f, highOffset=%0.5f\n",
+                axis.scale, axis.offset, axis.highScale, axis.highOffset);
+        dump.appendFormat(INDENT4 "  rawAxis=%d, rawMin=%d, rawMax=%d, "
+                "rawFlat=%d, rawFuzz=%d, rawResolution=%d\n",
+                mAxes.keyAt(i), axis.rawAxisInfo.minValue, axis.rawAxisInfo.maxValue,
+                axis.rawAxisInfo.flat, axis.rawAxisInfo.fuzz, axis.rawAxisInfo.resolution);
+    }
+}
+
+void JoystickInputMapper::configure(nsecs_t when,
+        const InputReaderConfiguration* config, uint32_t changes) {
+    InputMapper::configure(when, config, changes);
+
+    if (!changes) { // first time only
+        // Collect all axes.
+        for (int32_t abs = 0; abs <= ABS_MAX; abs++) {
+            if (!(getAbsAxisUsage(abs, getDevice()->getClasses())
+                    & INPUT_DEVICE_CLASS_JOYSTICK)) {
+                continue; // axis must be claimed by a different device
+            }
+
+            RawAbsoluteAxisInfo rawAxisInfo;
+            getAbsoluteAxisInfo(abs, &rawAxisInfo);
+            if (rawAxisInfo.valid) {
+                // Map axis.
+                AxisInfo axisInfo;
+                bool explicitlyMapped = !getEventHub()->mapAxis(getDeviceId(), abs, &axisInfo);
+                if (!explicitlyMapped) {
+                    // Axis is not explicitly mapped, will choose a generic axis later.
+                    axisInfo.mode = AxisInfo::MODE_NORMAL;
+                    axisInfo.axis = -1;
+                }
+
+                // Apply flat override.
+                int32_t rawFlat = axisInfo.flatOverride < 0
+                        ? rawAxisInfo.flat : axisInfo.flatOverride;
+
+                // Calculate scaling factors and limits.
+                Axis axis;
+                if (axisInfo.mode == AxisInfo::MODE_SPLIT) {
+                    float scale = 1.0f / (axisInfo.splitValue - rawAxisInfo.minValue);
+                    float highScale = 1.0f / (rawAxisInfo.maxValue - axisInfo.splitValue);
+                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
+                            scale, 0.0f, highScale, 0.0f,
+                            0.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
+                            rawAxisInfo.resolution * scale);
+                } else if (isCenteredAxis(axisInfo.axis)) {
+                    float scale = 2.0f / (rawAxisInfo.maxValue - rawAxisInfo.minValue);
+                    float offset = avg(rawAxisInfo.minValue, rawAxisInfo.maxValue) * -scale;
+                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
+                            scale, offset, scale, offset,
+                            -1.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
+                            rawAxisInfo.resolution * scale);
+                } else {
+                    float scale = 1.0f / (rawAxisInfo.maxValue - rawAxisInfo.minValue);
+                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
+                            scale, 0.0f, scale, 0.0f,
+                            0.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
+                            rawAxisInfo.resolution * scale);
+                }
+
+                // To eliminate noise while the joystick is at rest, filter out small variations
+                // in axis values up front.
+                axis.filter = axis.flat * 0.25f;
+
+                mAxes.add(abs, axis);
+            }
+        }
+
+        // If there are too many axes, start dropping them.
+        // Prefer to keep explicitly mapped axes.
+        if (mAxes.size() > PointerCoords::MAX_AXES) {
+            ALOGI("Joystick '%s' has %d axes but the framework only supports a maximum of %d.",
+                    getDeviceName().string(), mAxes.size(), PointerCoords::MAX_AXES);
+            pruneAxes(true);
+            pruneAxes(false);
+        }
+
+        // Assign generic axis ids to remaining axes.
+        int32_t nextGenericAxisId = AMOTION_EVENT_AXIS_GENERIC_1;
+        size_t numAxes = mAxes.size();
+        for (size_t i = 0; i < numAxes; i++) {
+            Axis& axis = mAxes.editValueAt(i);
+            if (axis.axisInfo.axis < 0) {
+                while (nextGenericAxisId <= AMOTION_EVENT_AXIS_GENERIC_16
+                        && haveAxis(nextGenericAxisId)) {
+                    nextGenericAxisId += 1;
+                }
+
+                if (nextGenericAxisId <= AMOTION_EVENT_AXIS_GENERIC_16) {
+                    axis.axisInfo.axis = nextGenericAxisId;
+                    nextGenericAxisId += 1;
+                } else {
+                    ALOGI("Ignoring joystick '%s' axis %d because all of the generic axis ids "
+                            "have already been assigned to other axes.",
+                            getDeviceName().string(), mAxes.keyAt(i));
+                    mAxes.removeItemsAt(i--);
+                    numAxes -= 1;
+                }
+            }
+        }
+    }
+}
+
+bool JoystickInputMapper::haveAxis(int32_t axisId) {
+    size_t numAxes = mAxes.size();
+    for (size_t i = 0; i < numAxes; i++) {
+        const Axis& axis = mAxes.valueAt(i);
+        if (axis.axisInfo.axis == axisId
+                || (axis.axisInfo.mode == AxisInfo::MODE_SPLIT
+                        && axis.axisInfo.highAxis == axisId)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+void JoystickInputMapper::pruneAxes(bool ignoreExplicitlyMappedAxes) {
+    size_t i = mAxes.size();
+    while (mAxes.size() > PointerCoords::MAX_AXES && i-- > 0) {
+        if (ignoreExplicitlyMappedAxes && mAxes.valueAt(i).explicitlyMapped) {
+            continue;
+        }
+        ALOGI("Discarding joystick '%s' axis %d because there are too many axes.",
+                getDeviceName().string(), mAxes.keyAt(i));
+        mAxes.removeItemsAt(i);
+    }
+}
+
+bool JoystickInputMapper::isCenteredAxis(int32_t axis) {
+    switch (axis) {
+    case AMOTION_EVENT_AXIS_X:
+    case AMOTION_EVENT_AXIS_Y:
+    case AMOTION_EVENT_AXIS_Z:
+    case AMOTION_EVENT_AXIS_RX:
+    case AMOTION_EVENT_AXIS_RY:
+    case AMOTION_EVENT_AXIS_RZ:
+    case AMOTION_EVENT_AXIS_HAT_X:
+    case AMOTION_EVENT_AXIS_HAT_Y:
+    case AMOTION_EVENT_AXIS_ORIENTATION:
+    case AMOTION_EVENT_AXIS_RUDDER:
+    case AMOTION_EVENT_AXIS_WHEEL:
+        return true;
+    default:
+        return false;
+    }
+}
+
+void JoystickInputMapper::reset(nsecs_t when) {
+    // Recenter all axes.
+    size_t numAxes = mAxes.size();
+    for (size_t i = 0; i < numAxes; i++) {
+        Axis& axis = mAxes.editValueAt(i);
+        axis.resetValue();
+    }
+
+    InputMapper::reset(when);
+}
+
+void JoystickInputMapper::process(const RawEvent* rawEvent) {
+    switch (rawEvent->type) {
+    case EV_ABS: {
+        ssize_t index = mAxes.indexOfKey(rawEvent->code);
+        if (index >= 0) {
+            Axis& axis = mAxes.editValueAt(index);
+            float newValue, highNewValue;
+            switch (axis.axisInfo.mode) {
+            case AxisInfo::MODE_INVERT:
+                newValue = (axis.rawAxisInfo.maxValue - rawEvent->value)
+                        * axis.scale + axis.offset;
+                highNewValue = 0.0f;
+                break;
+            case AxisInfo::MODE_SPLIT:
+                if (rawEvent->value < axis.axisInfo.splitValue) {
+                    newValue = (axis.axisInfo.splitValue - rawEvent->value)
+                            * axis.scale + axis.offset;
+                    highNewValue = 0.0f;
+                } else if (rawEvent->value > axis.axisInfo.splitValue) {
+                    newValue = 0.0f;
+                    highNewValue = (rawEvent->value - axis.axisInfo.splitValue)
+                            * axis.highScale + axis.highOffset;
+                } else {
+                    newValue = 0.0f;
+                    highNewValue = 0.0f;
+                }
+                break;
+            default:
+                newValue = rawEvent->value * axis.scale + axis.offset;
+                highNewValue = 0.0f;
+                break;
+            }
+            axis.newValue = newValue;
+            axis.highNewValue = highNewValue;
+        }
+        break;
+    }
+
+    case EV_SYN:
+        switch (rawEvent->code) {
+        case SYN_REPORT:
+            sync(rawEvent->when, false /*force*/);
+            break;
+        }
+        break;
+    }
+}
+
+void JoystickInputMapper::sync(nsecs_t when, bool force) {
+    if (!filterAxes(force)) {
+        return;
+    }
+
+    int32_t metaState = mContext->getGlobalMetaState();
+    int32_t buttonState = 0;
+
+    PointerProperties pointerProperties;
+    pointerProperties.clear();
+    pointerProperties.id = 0;
+    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
+
+    PointerCoords pointerCoords;
+    pointerCoords.clear();
+
+    size_t numAxes = mAxes.size();
+    for (size_t i = 0; i < numAxes; i++) {
+        const Axis& axis = mAxes.valueAt(i);
+        setPointerCoordsAxisValue(&pointerCoords, axis.axisInfo.axis, axis.currentValue);
+        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
+            setPointerCoordsAxisValue(&pointerCoords, axis.axisInfo.highAxis,
+                    axis.highCurrentValue);
+        }
+    }
+
+    // Moving a joystick axis should not wake the device because joysticks can
+    // be fairly noisy even when not in use.  On the other hand, pushing a gamepad
+    // button will likely wake the device.
+    // TODO: Use the input device configuration to control this behavior more finely.
+    uint32_t policyFlags = 0;
+
+    NotifyMotionArgs args(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, policyFlags,
+            AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+            ADISPLAY_ID_NONE, 1, &pointerProperties, &pointerCoords, 0, 0, 0);
+    getListener()->notifyMotion(&args);
+}
+
+void JoystickInputMapper::setPointerCoordsAxisValue(PointerCoords* pointerCoords,
+        int32_t axis, float value) {
+    pointerCoords->setAxisValue(axis, value);
+    /* In order to ease the transition for developers from using the old axes
+     * to the newer, more semantically correct axes, we'll continue to produce
+     * values for the old axes as mirrors of the value of their corresponding
+     * new axes. */
+    int32_t compatAxis = getCompatAxis(axis);
+    if (compatAxis >= 0) {
+        pointerCoords->setAxisValue(compatAxis, value);
+    }
+}
+
+bool JoystickInputMapper::filterAxes(bool force) {
+    bool atLeastOneSignificantChange = force;
+    size_t numAxes = mAxes.size();
+    for (size_t i = 0; i < numAxes; i++) {
+        Axis& axis = mAxes.editValueAt(i);
+        if (force || hasValueChangedSignificantly(axis.filter,
+                axis.newValue, axis.currentValue, axis.min, axis.max)) {
+            axis.currentValue = axis.newValue;
+            atLeastOneSignificantChange = true;
+        }
+        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
+            if (force || hasValueChangedSignificantly(axis.filter,
+                    axis.highNewValue, axis.highCurrentValue, axis.min, axis.max)) {
+                axis.highCurrentValue = axis.highNewValue;
+                atLeastOneSignificantChange = true;
+            }
+        }
+    }
+    return atLeastOneSignificantChange;
+}
+
+bool JoystickInputMapper::hasValueChangedSignificantly(
+        float filter, float newValue, float currentValue, float min, float max) {
+    if (newValue != currentValue) {
+        // Filter out small changes in value unless the value is converging on the axis
+        // bounds or center point.  This is intended to reduce the amount of information
+        // sent to applications by particularly noisy joysticks (such as PS3).
+        if (fabs(newValue - currentValue) > filter
+                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, min)
+                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, max)
+                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, 0)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool JoystickInputMapper::hasMovedNearerToValueWithinFilteredRange(
+        float filter, float newValue, float currentValue, float thresholdValue) {
+    float newDistance = fabs(newValue - thresholdValue);
+    if (newDistance < filter) {
+        float oldDistance = fabs(currentValue - thresholdValue);
+        if (newDistance < oldDistance) {
+            return true;
+        }
+    }
+    return false;
+}
+
+} // namespace android