InputReader.cpp revision eab5a1ed7c6262992b4abe7fb9abe752b1932087 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "InputReader"
18
19//#define LOG_NDEBUG 0
20
21// Log debug messages for each raw event received from the EventHub.
22#define DEBUG_RAW_EVENTS 0
23
24// Log debug messages about touch screen filtering hacks.
25#define DEBUG_HACKS 0
26
27// Log debug messages about virtual key processing.
28#define DEBUG_VIRTUAL_KEYS 0
29
30// Log debug messages about pointers.
31#define DEBUG_POINTERS 0
32
33// Log debug messages about pointer assignment calculations.
34#define DEBUG_POINTER_ASSIGNMENT 0
35
36// Log debug messages about gesture detection.
37#define DEBUG_GESTURES 0
38
39// Log debug messages about the vibrator.
40#define DEBUG_VIBRATOR 0
41
42// Log debug messages about fusing stylus data.
43#define DEBUG_STYLUS_FUSION 0
44
45#include "InputReader.h"
46
47#include <cutils/log.h>
48#include <input/Keyboard.h>
49#include <input/VirtualKeyMap.h>
50
51#include <inttypes.h>
52#include <stddef.h>
53#include <stdlib.h>
54#include <unistd.h>
55#include <errno.h>
56#include <limits.h>
57#include <math.h>
58
59#define INDENT "  "
60#define INDENT2 "    "
61#define INDENT3 "      "
62#define INDENT4 "        "
63#define INDENT5 "          "
64
65namespace android {
66
67// --- Constants ---
68
69// Maximum number of slots supported when using the slot-based Multitouch Protocol B.
70static const size_t MAX_SLOTS = 32;
71
72// Maximum amount of latency to add to touch events while waiting for data from an
73// external stylus.
74static const nsecs_t EXTERNAL_STYLUS_DATA_TIMEOUT = ms2ns(72);
75
76// Maximum amount of time to wait on touch data before pushing out new pressure data.
77static const nsecs_t TOUCH_DATA_TIMEOUT = ms2ns(20);
78
79// Artificial latency on synthetic events created from stylus data without corresponding touch
80// data.
81static const nsecs_t STYLUS_DATA_LATENCY = ms2ns(10);
82
83// --- Static Functions ---
84
85template<typename T>
86inline static T abs(const T& value) {
87    return value < 0 ? - value : value;
88}
89
90template<typename T>
91inline static T min(const T& a, const T& b) {
92    return a < b ? a : b;
93}
94
95template<typename T>
96inline static void swap(T& a, T& b) {
97    T temp = a;
98    a = b;
99    b = temp;
100}
101
102inline static float avg(float x, float y) {
103    return (x + y) / 2;
104}
105
106inline static float distance(float x1, float y1, float x2, float y2) {
107    return hypotf(x1 - x2, y1 - y2);
108}
109
110inline static int32_t signExtendNybble(int32_t value) {
111    return value >= 8 ? value - 16 : value;
112}
113
114static inline const char* toString(bool value) {
115    return value ? "true" : "false";
116}
117
118static int32_t rotateValueUsingRotationMap(int32_t value, int32_t orientation,
119        const int32_t map[][4], size_t mapSize) {
120    if (orientation != DISPLAY_ORIENTATION_0) {
121        for (size_t i = 0; i < mapSize; i++) {
122            if (value == map[i][0]) {
123                return map[i][orientation];
124            }
125        }
126    }
127    return value;
128}
129
130static const int32_t keyCodeRotationMap[][4] = {
131        // key codes enumerated counter-clockwise with the original (unrotated) key first
132        // no rotation,        90 degree rotation,  180 degree rotation, 270 degree rotation
133        { AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT },
134        { AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN },
135        { AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT },
136        { AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP },
137};
138static const size_t keyCodeRotationMapSize =
139        sizeof(keyCodeRotationMap) / sizeof(keyCodeRotationMap[0]);
140
141static int32_t rotateKeyCode(int32_t keyCode, int32_t orientation) {
142    return rotateValueUsingRotationMap(keyCode, orientation,
143            keyCodeRotationMap, keyCodeRotationMapSize);
144}
145
146static void rotateDelta(int32_t orientation, float* deltaX, float* deltaY) {
147    float temp;
148    switch (orientation) {
149    case DISPLAY_ORIENTATION_90:
150        temp = *deltaX;
151        *deltaX = *deltaY;
152        *deltaY = -temp;
153        break;
154
155    case DISPLAY_ORIENTATION_180:
156        *deltaX = -*deltaX;
157        *deltaY = -*deltaY;
158        break;
159
160    case DISPLAY_ORIENTATION_270:
161        temp = *deltaX;
162        *deltaX = -*deltaY;
163        *deltaY = temp;
164        break;
165    }
166}
167
168static inline bool sourcesMatchMask(uint32_t sources, uint32_t sourceMask) {
169    return (sources & sourceMask & ~ AINPUT_SOURCE_CLASS_MASK) != 0;
170}
171
172// Returns true if the pointer should be reported as being down given the specified
173// button states.  This determines whether the event is reported as a touch event.
174static bool isPointerDown(int32_t buttonState) {
175    return buttonState &
176            (AMOTION_EVENT_BUTTON_PRIMARY | AMOTION_EVENT_BUTTON_SECONDARY
177                    | AMOTION_EVENT_BUTTON_TERTIARY);
178}
179
180static float calculateCommonVector(float a, float b) {
181    if (a > 0 && b > 0) {
182        return a < b ? a : b;
183    } else if (a < 0 && b < 0) {
184        return a > b ? a : b;
185    } else {
186        return 0;
187    }
188}
189
190static void synthesizeButtonKey(InputReaderContext* context, int32_t action,
191        nsecs_t when, int32_t deviceId, uint32_t source,
192        uint32_t policyFlags, int32_t lastButtonState, int32_t currentButtonState,
193        int32_t buttonState, int32_t keyCode) {
194    if (
195            (action == AKEY_EVENT_ACTION_DOWN
196                    && !(lastButtonState & buttonState)
197                    && (currentButtonState & buttonState))
198            || (action == AKEY_EVENT_ACTION_UP
199                    && (lastButtonState & buttonState)
200                    && !(currentButtonState & buttonState))) {
201        NotifyKeyArgs args(when, deviceId, source, policyFlags,
202                action, 0, keyCode, 0, context->getGlobalMetaState(), when);
203        context->getListener()->notifyKey(&args);
204    }
205}
206
207static void synthesizeButtonKeys(InputReaderContext* context, int32_t action,
208        nsecs_t when, int32_t deviceId, uint32_t source,
209        uint32_t policyFlags, int32_t lastButtonState, int32_t currentButtonState) {
210    synthesizeButtonKey(context, action, when, deviceId, source, policyFlags,
211            lastButtonState, currentButtonState,
212            AMOTION_EVENT_BUTTON_BACK, AKEYCODE_BACK);
213    synthesizeButtonKey(context, action, when, deviceId, source, policyFlags,
214            lastButtonState, currentButtonState,
215            AMOTION_EVENT_BUTTON_FORWARD, AKEYCODE_FORWARD);
216}
217
218
219// --- InputReaderConfiguration ---
220
221bool InputReaderConfiguration::getDisplayInfo(bool external, DisplayViewport* outViewport) const {
222    const DisplayViewport& viewport = external ? mExternalDisplay : mInternalDisplay;
223    if (viewport.displayId >= 0) {
224        *outViewport = viewport;
225        return true;
226    }
227    return false;
228}
229
230void InputReaderConfiguration::setDisplayInfo(bool external, const DisplayViewport& viewport) {
231    DisplayViewport& v = external ? mExternalDisplay : mInternalDisplay;
232    v = viewport;
233}
234
235
236// -- TouchAffineTransformation --
237void TouchAffineTransformation::applyTo(float& x, float& y) const {
238    float newX, newY;
239    newX = x * x_scale + y * x_ymix + x_offset;
240    newY = x * y_xmix + y * y_scale + y_offset;
241
242    x = newX;
243    y = newY;
244}
245
246
247// --- InputReader ---
248
249InputReader::InputReader(const sp<EventHubInterface>& eventHub,
250        const sp<InputReaderPolicyInterface>& policy,
251        const sp<InputListenerInterface>& listener) :
252        mContext(this), mEventHub(eventHub), mPolicy(policy),
253        mGlobalMetaState(0), mGeneration(1),
254        mDisableVirtualKeysTimeout(LLONG_MIN), mNextTimeout(LLONG_MAX),
255        mConfigurationChangesToRefresh(0) {
256    mQueuedListener = new QueuedInputListener(listener);
257
258    { // acquire lock
259        AutoMutex _l(mLock);
260
261        refreshConfigurationLocked(0);
262        updateGlobalMetaStateLocked();
263    } // release lock
264}
265
266InputReader::~InputReader() {
267    for (size_t i = 0; i < mDevices.size(); i++) {
268        delete mDevices.valueAt(i);
269    }
270}
271
272void InputReader::loopOnce() {
273    int32_t oldGeneration;
274    int32_t timeoutMillis;
275    bool inputDevicesChanged = false;
276    Vector<InputDeviceInfo> inputDevices;
277    { // acquire lock
278        AutoMutex _l(mLock);
279
280        oldGeneration = mGeneration;
281        timeoutMillis = -1;
282
283        uint32_t changes = mConfigurationChangesToRefresh;
284        if (changes) {
285            mConfigurationChangesToRefresh = 0;
286            timeoutMillis = 0;
287            refreshConfigurationLocked(changes);
288        } else if (mNextTimeout != LLONG_MAX) {
289            nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
290            timeoutMillis = toMillisecondTimeoutDelay(now, mNextTimeout);
291        }
292    } // release lock
293
294    size_t count = mEventHub->getEvents(timeoutMillis, mEventBuffer, EVENT_BUFFER_SIZE);
295
296    { // acquire lock
297        AutoMutex _l(mLock);
298        mReaderIsAliveCondition.broadcast();
299
300        if (count) {
301            processEventsLocked(mEventBuffer, count);
302        }
303
304        if (mNextTimeout != LLONG_MAX) {
305            nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
306            if (now >= mNextTimeout) {
307#if DEBUG_RAW_EVENTS
308                ALOGD("Timeout expired, latency=%0.3fms", (now - mNextTimeout) * 0.000001f);
309#endif
310                mNextTimeout = LLONG_MAX;
311                timeoutExpiredLocked(now);
312            }
313        }
314
315        if (oldGeneration != mGeneration) {
316            inputDevicesChanged = true;
317            getInputDevicesLocked(inputDevices);
318        }
319    } // release lock
320
321    // Send out a message that the describes the changed input devices.
322    if (inputDevicesChanged) {
323        mPolicy->notifyInputDevicesChanged(inputDevices);
324    }
325
326    // Flush queued events out to the listener.
327    // This must happen outside of the lock because the listener could potentially call
328    // back into the InputReader's methods, such as getScanCodeState, or become blocked
329    // on another thread similarly waiting to acquire the InputReader lock thereby
330    // resulting in a deadlock.  This situation is actually quite plausible because the
331    // listener is actually the input dispatcher, which calls into the window manager,
332    // which occasionally calls into the input reader.
333    mQueuedListener->flush();
334}
335
336void InputReader::processEventsLocked(const RawEvent* rawEvents, size_t count) {
337    for (const RawEvent* rawEvent = rawEvents; count;) {
338        int32_t type = rawEvent->type;
339        size_t batchSize = 1;
340        if (type < EventHubInterface::FIRST_SYNTHETIC_EVENT) {
341            int32_t deviceId = rawEvent->deviceId;
342            while (batchSize < count) {
343                if (rawEvent[batchSize].type >= EventHubInterface::FIRST_SYNTHETIC_EVENT
344                        || rawEvent[batchSize].deviceId != deviceId) {
345                    break;
346                }
347                batchSize += 1;
348            }
349#if DEBUG_RAW_EVENTS
350            ALOGD("BatchSize: %d Count: %d", batchSize, count);
351#endif
352            processEventsForDeviceLocked(deviceId, rawEvent, batchSize);
353        } else {
354            switch (rawEvent->type) {
355            case EventHubInterface::DEVICE_ADDED:
356                addDeviceLocked(rawEvent->when, rawEvent->deviceId);
357                break;
358            case EventHubInterface::DEVICE_REMOVED:
359                removeDeviceLocked(rawEvent->when, rawEvent->deviceId);
360                break;
361            case EventHubInterface::FINISHED_DEVICE_SCAN:
362                handleConfigurationChangedLocked(rawEvent->when);
363                break;
364            default:
365                ALOG_ASSERT(false); // can't happen
366                break;
367            }
368        }
369        count -= batchSize;
370        rawEvent += batchSize;
371    }
372}
373
374void InputReader::addDeviceLocked(nsecs_t when, int32_t deviceId) {
375    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
376    if (deviceIndex >= 0) {
377        ALOGW("Ignoring spurious device added event for deviceId %d.", deviceId);
378        return;
379    }
380
381    InputDeviceIdentifier identifier = mEventHub->getDeviceIdentifier(deviceId);
382    uint32_t classes = mEventHub->getDeviceClasses(deviceId);
383    int32_t controllerNumber = mEventHub->getDeviceControllerNumber(deviceId);
384
385    InputDevice* device = createDeviceLocked(deviceId, controllerNumber, identifier, classes);
386    device->configure(when, &mConfig, 0);
387    device->reset(when);
388
389    if (device->isIgnored()) {
390        ALOGI("Device added: id=%d, name='%s' (ignored non-input device)", deviceId,
391                identifier.name.string());
392    } else {
393        ALOGI("Device added: id=%d, name='%s', sources=0x%08x", deviceId,
394                identifier.name.string(), device->getSources());
395    }
396
397    mDevices.add(deviceId, device);
398    bumpGenerationLocked();
399
400    if (device->getClasses() & INPUT_DEVICE_CLASS_EXTERNAL_STYLUS) {
401        notifyExternalStylusPresenceChanged();
402    }
403}
404
405void InputReader::removeDeviceLocked(nsecs_t when, int32_t deviceId) {
406    InputDevice* device = NULL;
407    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
408    if (deviceIndex < 0) {
409        ALOGW("Ignoring spurious device removed event for deviceId %d.", deviceId);
410        return;
411    }
412
413    device = mDevices.valueAt(deviceIndex);
414    mDevices.removeItemsAt(deviceIndex, 1);
415    bumpGenerationLocked();
416
417    if (device->isIgnored()) {
418        ALOGI("Device removed: id=%d, name='%s' (ignored non-input device)",
419                device->getId(), device->getName().string());
420    } else {
421        ALOGI("Device removed: id=%d, name='%s', sources=0x%08x",
422                device->getId(), device->getName().string(), device->getSources());
423    }
424
425    if (device->getClasses() & INPUT_DEVICE_CLASS_EXTERNAL_STYLUS) {
426        notifyExternalStylusPresenceChanged();
427    }
428
429    device->reset(when);
430    delete device;
431}
432
433InputDevice* InputReader::createDeviceLocked(int32_t deviceId, int32_t controllerNumber,
434        const InputDeviceIdentifier& identifier, uint32_t classes) {
435    InputDevice* device = new InputDevice(&mContext, deviceId, bumpGenerationLocked(),
436            controllerNumber, identifier, classes);
437
438    // External devices.
439    if (classes & INPUT_DEVICE_CLASS_EXTERNAL) {
440        device->setExternal(true);
441    }
442
443    // Devices with mics.
444    if (classes & INPUT_DEVICE_CLASS_MIC) {
445        device->setMic(true);
446    }
447
448    // Switch-like devices.
449    if (classes & INPUT_DEVICE_CLASS_SWITCH) {
450        device->addMapper(new SwitchInputMapper(device));
451    }
452
453    // Vibrator-like devices.
454    if (classes & INPUT_DEVICE_CLASS_VIBRATOR) {
455        device->addMapper(new VibratorInputMapper(device));
456    }
457
458    // Keyboard-like devices.
459    uint32_t keyboardSource = 0;
460    int32_t keyboardType = AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC;
461    if (classes & INPUT_DEVICE_CLASS_KEYBOARD) {
462        keyboardSource |= AINPUT_SOURCE_KEYBOARD;
463    }
464    if (classes & INPUT_DEVICE_CLASS_ALPHAKEY) {
465        keyboardType = AINPUT_KEYBOARD_TYPE_ALPHABETIC;
466    }
467    if (classes & INPUT_DEVICE_CLASS_DPAD) {
468        keyboardSource |= AINPUT_SOURCE_DPAD;
469    }
470    if (classes & INPUT_DEVICE_CLASS_GAMEPAD) {
471        keyboardSource |= AINPUT_SOURCE_GAMEPAD;
472    }
473
474    if (keyboardSource != 0) {
475        device->addMapper(new KeyboardInputMapper(device, keyboardSource, keyboardType));
476    }
477
478    // Cursor-like devices.
479    if (classes & INPUT_DEVICE_CLASS_CURSOR) {
480        device->addMapper(new CursorInputMapper(device));
481    }
482
483    // Touchscreens and touchpad devices.
484    if (classes & INPUT_DEVICE_CLASS_TOUCH_MT) {
485        device->addMapper(new MultiTouchInputMapper(device));
486    } else if (classes & INPUT_DEVICE_CLASS_TOUCH) {
487        device->addMapper(new SingleTouchInputMapper(device));
488    }
489
490    // Joystick-like devices.
491    if (classes & INPUT_DEVICE_CLASS_JOYSTICK) {
492        device->addMapper(new JoystickInputMapper(device));
493    }
494
495    // External stylus-like devices.
496    if (classes & INPUT_DEVICE_CLASS_EXTERNAL_STYLUS) {
497        device->addMapper(new ExternalStylusInputMapper(device));
498    }
499
500    return device;
501}
502
503void InputReader::processEventsForDeviceLocked(int32_t deviceId,
504        const RawEvent* rawEvents, size_t count) {
505    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
506    if (deviceIndex < 0) {
507        ALOGW("Discarding event for unknown deviceId %d.", deviceId);
508        return;
509    }
510
511    InputDevice* device = mDevices.valueAt(deviceIndex);
512    if (device->isIgnored()) {
513        //ALOGD("Discarding event for ignored deviceId %d.", deviceId);
514        return;
515    }
516
517    device->process(rawEvents, count);
518}
519
520void InputReader::timeoutExpiredLocked(nsecs_t when) {
521    for (size_t i = 0; i < mDevices.size(); i++) {
522        InputDevice* device = mDevices.valueAt(i);
523        if (!device->isIgnored()) {
524            device->timeoutExpired(when);
525        }
526    }
527}
528
529void InputReader::handleConfigurationChangedLocked(nsecs_t when) {
530    // Reset global meta state because it depends on the list of all configured devices.
531    updateGlobalMetaStateLocked();
532
533    // Enqueue configuration changed.
534    NotifyConfigurationChangedArgs args(when);
535    mQueuedListener->notifyConfigurationChanged(&args);
536}
537
538void InputReader::refreshConfigurationLocked(uint32_t changes) {
539    mPolicy->getReaderConfiguration(&mConfig);
540    mEventHub->setExcludedDevices(mConfig.excludedDeviceNames);
541
542    if (changes) {
543        ALOGI("Reconfiguring input devices.  changes=0x%08x", changes);
544        nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
545
546        if (changes & InputReaderConfiguration::CHANGE_MUST_REOPEN) {
547            mEventHub->requestReopenDevices();
548        } else {
549            for (size_t i = 0; i < mDevices.size(); i++) {
550                InputDevice* device = mDevices.valueAt(i);
551                device->configure(now, &mConfig, changes);
552            }
553        }
554    }
555}
556
557void InputReader::updateGlobalMetaStateLocked() {
558    mGlobalMetaState = 0;
559
560    for (size_t i = 0; i < mDevices.size(); i++) {
561        InputDevice* device = mDevices.valueAt(i);
562        mGlobalMetaState |= device->getMetaState();
563    }
564}
565
566int32_t InputReader::getGlobalMetaStateLocked() {
567    return mGlobalMetaState;
568}
569
570void InputReader::notifyExternalStylusPresenceChanged() {
571    refreshConfigurationLocked(InputReaderConfiguration::CHANGE_EXTERNAL_STYLUS_PRESENCE);
572}
573
574void InputReader::getExternalStylusDevicesLocked(Vector<InputDeviceInfo>& outDevices) {
575    for (size_t i = 0; i < mDevices.size(); i++) {
576        InputDevice* device = mDevices.valueAt(i);
577        if (device->getClasses() & INPUT_DEVICE_CLASS_EXTERNAL_STYLUS && !device->isIgnored()) {
578            outDevices.push();
579            device->getDeviceInfo(&outDevices.editTop());
580        }
581    }
582}
583
584void InputReader::dispatchExternalStylusState(const StylusState& state) {
585    for (size_t i = 0; i < mDevices.size(); i++) {
586        InputDevice* device = mDevices.valueAt(i);
587        device->updateExternalStylusState(state);
588    }
589}
590
591void InputReader::disableVirtualKeysUntilLocked(nsecs_t time) {
592    mDisableVirtualKeysTimeout = time;
593}
594
595bool InputReader::shouldDropVirtualKeyLocked(nsecs_t now,
596        InputDevice* device, int32_t keyCode, int32_t scanCode) {
597    if (now < mDisableVirtualKeysTimeout) {
598        ALOGI("Dropping virtual key from device %s because virtual keys are "
599                "temporarily disabled for the next %0.3fms.  keyCode=%d, scanCode=%d",
600                device->getName().string(),
601                (mDisableVirtualKeysTimeout - now) * 0.000001,
602                keyCode, scanCode);
603        return true;
604    } else {
605        return false;
606    }
607}
608
609void InputReader::fadePointerLocked() {
610    for (size_t i = 0; i < mDevices.size(); i++) {
611        InputDevice* device = mDevices.valueAt(i);
612        device->fadePointer();
613    }
614}
615
616void InputReader::requestTimeoutAtTimeLocked(nsecs_t when) {
617    if (when < mNextTimeout) {
618        mNextTimeout = when;
619        mEventHub->wake();
620    }
621}
622
623int32_t InputReader::bumpGenerationLocked() {
624    return ++mGeneration;
625}
626
627void InputReader::getInputDevices(Vector<InputDeviceInfo>& outInputDevices) {
628    AutoMutex _l(mLock);
629    getInputDevicesLocked(outInputDevices);
630}
631
632void InputReader::getInputDevicesLocked(Vector<InputDeviceInfo>& outInputDevices) {
633    outInputDevices.clear();
634
635    size_t numDevices = mDevices.size();
636    for (size_t i = 0; i < numDevices; i++) {
637        InputDevice* device = mDevices.valueAt(i);
638        if (!device->isIgnored()) {
639            outInputDevices.push();
640            device->getDeviceInfo(&outInputDevices.editTop());
641        }
642    }
643}
644
645int32_t InputReader::getKeyCodeState(int32_t deviceId, uint32_t sourceMask,
646        int32_t keyCode) {
647    AutoMutex _l(mLock);
648
649    return getStateLocked(deviceId, sourceMask, keyCode, &InputDevice::getKeyCodeState);
650}
651
652int32_t InputReader::getScanCodeState(int32_t deviceId, uint32_t sourceMask,
653        int32_t scanCode) {
654    AutoMutex _l(mLock);
655
656    return getStateLocked(deviceId, sourceMask, scanCode, &InputDevice::getScanCodeState);
657}
658
659int32_t InputReader::getSwitchState(int32_t deviceId, uint32_t sourceMask, int32_t switchCode) {
660    AutoMutex _l(mLock);
661
662    return getStateLocked(deviceId, sourceMask, switchCode, &InputDevice::getSwitchState);
663}
664
665int32_t InputReader::getStateLocked(int32_t deviceId, uint32_t sourceMask, int32_t code,
666        GetStateFunc getStateFunc) {
667    int32_t result = AKEY_STATE_UNKNOWN;
668    if (deviceId >= 0) {
669        ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
670        if (deviceIndex >= 0) {
671            InputDevice* device = mDevices.valueAt(deviceIndex);
672            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
673                result = (device->*getStateFunc)(sourceMask, code);
674            }
675        }
676    } else {
677        size_t numDevices = mDevices.size();
678        for (size_t i = 0; i < numDevices; i++) {
679            InputDevice* device = mDevices.valueAt(i);
680            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
681                // If any device reports AKEY_STATE_DOWN or AKEY_STATE_VIRTUAL, return that
682                // value.  Otherwise, return AKEY_STATE_UP as long as one device reports it.
683                int32_t currentResult = (device->*getStateFunc)(sourceMask, code);
684                if (currentResult >= AKEY_STATE_DOWN) {
685                    return currentResult;
686                } else if (currentResult == AKEY_STATE_UP) {
687                    result = currentResult;
688                }
689            }
690        }
691    }
692    return result;
693}
694
695bool InputReader::hasKeys(int32_t deviceId, uint32_t sourceMask,
696        size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) {
697    AutoMutex _l(mLock);
698
699    memset(outFlags, 0, numCodes);
700    return markSupportedKeyCodesLocked(deviceId, sourceMask, numCodes, keyCodes, outFlags);
701}
702
703bool InputReader::markSupportedKeyCodesLocked(int32_t deviceId, uint32_t sourceMask,
704        size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) {
705    bool result = false;
706    if (deviceId >= 0) {
707        ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
708        if (deviceIndex >= 0) {
709            InputDevice* device = mDevices.valueAt(deviceIndex);
710            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
711                result = device->markSupportedKeyCodes(sourceMask,
712                        numCodes, keyCodes, outFlags);
713            }
714        }
715    } else {
716        size_t numDevices = mDevices.size();
717        for (size_t i = 0; i < numDevices; i++) {
718            InputDevice* device = mDevices.valueAt(i);
719            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
720                result |= device->markSupportedKeyCodes(sourceMask,
721                        numCodes, keyCodes, outFlags);
722            }
723        }
724    }
725    return result;
726}
727
728void InputReader::requestRefreshConfiguration(uint32_t changes) {
729    AutoMutex _l(mLock);
730
731    if (changes) {
732        bool needWake = !mConfigurationChangesToRefresh;
733        mConfigurationChangesToRefresh |= changes;
734
735        if (needWake) {
736            mEventHub->wake();
737        }
738    }
739}
740
741void InputReader::vibrate(int32_t deviceId, const nsecs_t* pattern, size_t patternSize,
742        ssize_t repeat, int32_t token) {
743    AutoMutex _l(mLock);
744
745    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
746    if (deviceIndex >= 0) {
747        InputDevice* device = mDevices.valueAt(deviceIndex);
748        device->vibrate(pattern, patternSize, repeat, token);
749    }
750}
751
752void InputReader::cancelVibrate(int32_t deviceId, int32_t token) {
753    AutoMutex _l(mLock);
754
755    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
756    if (deviceIndex >= 0) {
757        InputDevice* device = mDevices.valueAt(deviceIndex);
758        device->cancelVibrate(token);
759    }
760}
761
762void InputReader::dump(String8& dump) {
763    AutoMutex _l(mLock);
764
765    mEventHub->dump(dump);
766    dump.append("\n");
767
768    dump.append("Input Reader State:\n");
769
770    for (size_t i = 0; i < mDevices.size(); i++) {
771        mDevices.valueAt(i)->dump(dump);
772    }
773
774    dump.append(INDENT "Configuration:\n");
775    dump.append(INDENT2 "ExcludedDeviceNames: [");
776    for (size_t i = 0; i < mConfig.excludedDeviceNames.size(); i++) {
777        if (i != 0) {
778            dump.append(", ");
779        }
780        dump.append(mConfig.excludedDeviceNames.itemAt(i).string());
781    }
782    dump.append("]\n");
783    dump.appendFormat(INDENT2 "VirtualKeyQuietTime: %0.1fms\n",
784            mConfig.virtualKeyQuietTime * 0.000001f);
785
786    dump.appendFormat(INDENT2 "PointerVelocityControlParameters: "
787            "scale=%0.3f, lowThreshold=%0.3f, highThreshold=%0.3f, acceleration=%0.3f\n",
788            mConfig.pointerVelocityControlParameters.scale,
789            mConfig.pointerVelocityControlParameters.lowThreshold,
790            mConfig.pointerVelocityControlParameters.highThreshold,
791            mConfig.pointerVelocityControlParameters.acceleration);
792
793    dump.appendFormat(INDENT2 "WheelVelocityControlParameters: "
794            "scale=%0.3f, lowThreshold=%0.3f, highThreshold=%0.3f, acceleration=%0.3f\n",
795            mConfig.wheelVelocityControlParameters.scale,
796            mConfig.wheelVelocityControlParameters.lowThreshold,
797            mConfig.wheelVelocityControlParameters.highThreshold,
798            mConfig.wheelVelocityControlParameters.acceleration);
799
800    dump.appendFormat(INDENT2 "PointerGesture:\n");
801    dump.appendFormat(INDENT3 "Enabled: %s\n",
802            toString(mConfig.pointerGesturesEnabled));
803    dump.appendFormat(INDENT3 "QuietInterval: %0.1fms\n",
804            mConfig.pointerGestureQuietInterval * 0.000001f);
805    dump.appendFormat(INDENT3 "DragMinSwitchSpeed: %0.1fpx/s\n",
806            mConfig.pointerGestureDragMinSwitchSpeed);
807    dump.appendFormat(INDENT3 "TapInterval: %0.1fms\n",
808            mConfig.pointerGestureTapInterval * 0.000001f);
809    dump.appendFormat(INDENT3 "TapDragInterval: %0.1fms\n",
810            mConfig.pointerGestureTapDragInterval * 0.000001f);
811    dump.appendFormat(INDENT3 "TapSlop: %0.1fpx\n",
812            mConfig.pointerGestureTapSlop);
813    dump.appendFormat(INDENT3 "MultitouchSettleInterval: %0.1fms\n",
814            mConfig.pointerGestureMultitouchSettleInterval * 0.000001f);
815    dump.appendFormat(INDENT3 "MultitouchMinDistance: %0.1fpx\n",
816            mConfig.pointerGestureMultitouchMinDistance);
817    dump.appendFormat(INDENT3 "SwipeTransitionAngleCosine: %0.1f\n",
818            mConfig.pointerGestureSwipeTransitionAngleCosine);
819    dump.appendFormat(INDENT3 "SwipeMaxWidthRatio: %0.1f\n",
820            mConfig.pointerGestureSwipeMaxWidthRatio);
821    dump.appendFormat(INDENT3 "MovementSpeedRatio: %0.1f\n",
822            mConfig.pointerGestureMovementSpeedRatio);
823    dump.appendFormat(INDENT3 "ZoomSpeedRatio: %0.1f\n",
824            mConfig.pointerGestureZoomSpeedRatio);
825}
826
827void InputReader::monitor() {
828    // Acquire and release the lock to ensure that the reader has not deadlocked.
829    mLock.lock();
830    mEventHub->wake();
831    mReaderIsAliveCondition.wait(mLock);
832    mLock.unlock();
833
834    // Check the EventHub
835    mEventHub->monitor();
836}
837
838
839// --- InputReader::ContextImpl ---
840
841InputReader::ContextImpl::ContextImpl(InputReader* reader) :
842        mReader(reader) {
843}
844
845void InputReader::ContextImpl::updateGlobalMetaState() {
846    // lock is already held by the input loop
847    mReader->updateGlobalMetaStateLocked();
848}
849
850int32_t InputReader::ContextImpl::getGlobalMetaState() {
851    // lock is already held by the input loop
852    return mReader->getGlobalMetaStateLocked();
853}
854
855void InputReader::ContextImpl::disableVirtualKeysUntil(nsecs_t time) {
856    // lock is already held by the input loop
857    mReader->disableVirtualKeysUntilLocked(time);
858}
859
860bool InputReader::ContextImpl::shouldDropVirtualKey(nsecs_t now,
861        InputDevice* device, int32_t keyCode, int32_t scanCode) {
862    // lock is already held by the input loop
863    return mReader->shouldDropVirtualKeyLocked(now, device, keyCode, scanCode);
864}
865
866void InputReader::ContextImpl::fadePointer() {
867    // lock is already held by the input loop
868    mReader->fadePointerLocked();
869}
870
871void InputReader::ContextImpl::requestTimeoutAtTime(nsecs_t when) {
872    // lock is already held by the input loop
873    mReader->requestTimeoutAtTimeLocked(when);
874}
875
876int32_t InputReader::ContextImpl::bumpGeneration() {
877    // lock is already held by the input loop
878    return mReader->bumpGenerationLocked();
879}
880
881void InputReader::ContextImpl::getExternalStylusDevices(Vector<InputDeviceInfo>& outDevices) {
882    // lock is already held by whatever called refreshConfigurationLocked
883    mReader->getExternalStylusDevicesLocked(outDevices);
884}
885
886void InputReader::ContextImpl::dispatchExternalStylusState(const StylusState& state) {
887    mReader->dispatchExternalStylusState(state);
888}
889
890InputReaderPolicyInterface* InputReader::ContextImpl::getPolicy() {
891    return mReader->mPolicy.get();
892}
893
894InputListenerInterface* InputReader::ContextImpl::getListener() {
895    return mReader->mQueuedListener.get();
896}
897
898EventHubInterface* InputReader::ContextImpl::getEventHub() {
899    return mReader->mEventHub.get();
900}
901
902
903// --- InputReaderThread ---
904
905InputReaderThread::InputReaderThread(const sp<InputReaderInterface>& reader) :
906        Thread(/*canCallJava*/ true), mReader(reader) {
907}
908
909InputReaderThread::~InputReaderThread() {
910}
911
912bool InputReaderThread::threadLoop() {
913    mReader->loopOnce();
914    return true;
915}
916
917
918// --- InputDevice ---
919
920InputDevice::InputDevice(InputReaderContext* context, int32_t id, int32_t generation,
921        int32_t controllerNumber, const InputDeviceIdentifier& identifier, uint32_t classes) :
922        mContext(context), mId(id), mGeneration(generation), mControllerNumber(controllerNumber),
923        mIdentifier(identifier), mClasses(classes),
924        mSources(0), mIsExternal(false), mHasMic(false), mDropUntilNextSync(false) {
925}
926
927InputDevice::~InputDevice() {
928    size_t numMappers = mMappers.size();
929    for (size_t i = 0; i < numMappers; i++) {
930        delete mMappers[i];
931    }
932    mMappers.clear();
933}
934
935void InputDevice::dump(String8& dump) {
936    InputDeviceInfo deviceInfo;
937    getDeviceInfo(& deviceInfo);
938
939    dump.appendFormat(INDENT "Device %d: %s\n", deviceInfo.getId(),
940            deviceInfo.getDisplayName().string());
941    dump.appendFormat(INDENT2 "Generation: %d\n", mGeneration);
942    dump.appendFormat(INDENT2 "IsExternal: %s\n", toString(mIsExternal));
943    dump.appendFormat(INDENT2 "HasMic:     %s\n", toString(mHasMic));
944    dump.appendFormat(INDENT2 "Sources: 0x%08x\n", deviceInfo.getSources());
945    dump.appendFormat(INDENT2 "KeyboardType: %d\n", deviceInfo.getKeyboardType());
946
947    const Vector<InputDeviceInfo::MotionRange>& ranges = deviceInfo.getMotionRanges();
948    if (!ranges.isEmpty()) {
949        dump.append(INDENT2 "Motion Ranges:\n");
950        for (size_t i = 0; i < ranges.size(); i++) {
951            const InputDeviceInfo::MotionRange& range = ranges.itemAt(i);
952            const char* label = getAxisLabel(range.axis);
953            char name[32];
954            if (label) {
955                strncpy(name, label, sizeof(name));
956                name[sizeof(name) - 1] = '\0';
957            } else {
958                snprintf(name, sizeof(name), "%d", range.axis);
959            }
960            dump.appendFormat(INDENT3 "%s: source=0x%08x, "
961                    "min=%0.3f, max=%0.3f, flat=%0.3f, fuzz=%0.3f, resolution=%0.3f\n",
962                    name, range.source, range.min, range.max, range.flat, range.fuzz,
963                    range.resolution);
964        }
965    }
966
967    size_t numMappers = mMappers.size();
968    for (size_t i = 0; i < numMappers; i++) {
969        InputMapper* mapper = mMappers[i];
970        mapper->dump(dump);
971    }
972}
973
974void InputDevice::addMapper(InputMapper* mapper) {
975    mMappers.add(mapper);
976}
977
978void InputDevice::configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes) {
979    mSources = 0;
980
981    if (!isIgnored()) {
982        if (!changes) { // first time only
983            mContext->getEventHub()->getConfiguration(mId, &mConfiguration);
984        }
985
986        if (!changes || (changes & InputReaderConfiguration::CHANGE_KEYBOARD_LAYOUTS)) {
987            if (!(mClasses & INPUT_DEVICE_CLASS_VIRTUAL)) {
988                sp<KeyCharacterMap> keyboardLayout =
989                        mContext->getPolicy()->getKeyboardLayoutOverlay(mIdentifier);
990                if (mContext->getEventHub()->setKeyboardLayoutOverlay(mId, keyboardLayout)) {
991                    bumpGeneration();
992                }
993            }
994        }
995
996        if (!changes || (changes & InputReaderConfiguration::CHANGE_DEVICE_ALIAS)) {
997            if (!(mClasses & INPUT_DEVICE_CLASS_VIRTUAL)) {
998                String8 alias = mContext->getPolicy()->getDeviceAlias(mIdentifier);
999                if (mAlias != alias) {
1000                    mAlias = alias;
1001                    bumpGeneration();
1002                }
1003            }
1004        }
1005
1006        size_t numMappers = mMappers.size();
1007        for (size_t i = 0; i < numMappers; i++) {
1008            InputMapper* mapper = mMappers[i];
1009            mapper->configure(when, config, changes);
1010            mSources |= mapper->getSources();
1011        }
1012    }
1013}
1014
1015void InputDevice::reset(nsecs_t when) {
1016    size_t numMappers = mMappers.size();
1017    for (size_t i = 0; i < numMappers; i++) {
1018        InputMapper* mapper = mMappers[i];
1019        mapper->reset(when);
1020    }
1021
1022    mContext->updateGlobalMetaState();
1023
1024    notifyReset(when);
1025}
1026
1027void InputDevice::process(const RawEvent* rawEvents, size_t count) {
1028    // Process all of the events in order for each mapper.
1029    // We cannot simply ask each mapper to process them in bulk because mappers may
1030    // have side-effects that must be interleaved.  For example, joystick movement events and
1031    // gamepad button presses are handled by different mappers but they should be dispatched
1032    // in the order received.
1033    size_t numMappers = mMappers.size();
1034    for (const RawEvent* rawEvent = rawEvents; count--; rawEvent++) {
1035#if DEBUG_RAW_EVENTS
1036        ALOGD("Input event: device=%d type=0x%04x code=0x%04x value=0x%08x when=%lld",
1037                rawEvent->deviceId, rawEvent->type, rawEvent->code, rawEvent->value,
1038                rawEvent->when);
1039#endif
1040
1041        if (mDropUntilNextSync) {
1042            if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
1043                mDropUntilNextSync = false;
1044#if DEBUG_RAW_EVENTS
1045                ALOGD("Recovered from input event buffer overrun.");
1046#endif
1047            } else {
1048#if DEBUG_RAW_EVENTS
1049                ALOGD("Dropped input event while waiting for next input sync.");
1050#endif
1051            }
1052        } else if (rawEvent->type == EV_SYN && rawEvent->code == SYN_DROPPED) {
1053            ALOGI("Detected input event buffer overrun for device %s.", getName().string());
1054            mDropUntilNextSync = true;
1055            reset(rawEvent->when);
1056        } else {
1057            for (size_t i = 0; i < numMappers; i++) {
1058                InputMapper* mapper = mMappers[i];
1059                mapper->process(rawEvent);
1060            }
1061        }
1062    }
1063}
1064
1065void InputDevice::timeoutExpired(nsecs_t when) {
1066    size_t numMappers = mMappers.size();
1067    for (size_t i = 0; i < numMappers; i++) {
1068        InputMapper* mapper = mMappers[i];
1069        mapper->timeoutExpired(when);
1070    }
1071}
1072
1073void InputDevice::updateExternalStylusState(const StylusState& state) {
1074    size_t numMappers = mMappers.size();
1075    for (size_t i = 0; i < numMappers; i++) {
1076        InputMapper* mapper = mMappers[i];
1077        mapper->updateExternalStylusState(state);
1078    }
1079}
1080
1081void InputDevice::getDeviceInfo(InputDeviceInfo* outDeviceInfo) {
1082    outDeviceInfo->initialize(mId, mGeneration, mControllerNumber, mIdentifier, mAlias,
1083            mIsExternal, mHasMic);
1084    size_t numMappers = mMappers.size();
1085    for (size_t i = 0; i < numMappers; i++) {
1086        InputMapper* mapper = mMappers[i];
1087        mapper->populateDeviceInfo(outDeviceInfo);
1088    }
1089}
1090
1091int32_t InputDevice::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
1092    return getState(sourceMask, keyCode, & InputMapper::getKeyCodeState);
1093}
1094
1095int32_t InputDevice::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
1096    return getState(sourceMask, scanCode, & InputMapper::getScanCodeState);
1097}
1098
1099int32_t InputDevice::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
1100    return getState(sourceMask, switchCode, & InputMapper::getSwitchState);
1101}
1102
1103int32_t InputDevice::getState(uint32_t sourceMask, int32_t code, GetStateFunc getStateFunc) {
1104    int32_t result = AKEY_STATE_UNKNOWN;
1105    size_t numMappers = mMappers.size();
1106    for (size_t i = 0; i < numMappers; i++) {
1107        InputMapper* mapper = mMappers[i];
1108        if (sourcesMatchMask(mapper->getSources(), sourceMask)) {
1109            // If any mapper reports AKEY_STATE_DOWN or AKEY_STATE_VIRTUAL, return that
1110            // value.  Otherwise, return AKEY_STATE_UP as long as one mapper reports it.
1111            int32_t currentResult = (mapper->*getStateFunc)(sourceMask, code);
1112            if (currentResult >= AKEY_STATE_DOWN) {
1113                return currentResult;
1114            } else if (currentResult == AKEY_STATE_UP) {
1115                result = currentResult;
1116            }
1117        }
1118    }
1119    return result;
1120}
1121
1122bool InputDevice::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
1123        const int32_t* keyCodes, uint8_t* outFlags) {
1124    bool result = false;
1125    size_t numMappers = mMappers.size();
1126    for (size_t i = 0; i < numMappers; i++) {
1127        InputMapper* mapper = mMappers[i];
1128        if (sourcesMatchMask(mapper->getSources(), sourceMask)) {
1129            result |= mapper->markSupportedKeyCodes(sourceMask, numCodes, keyCodes, outFlags);
1130        }
1131    }
1132    return result;
1133}
1134
1135void InputDevice::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
1136        int32_t token) {
1137    size_t numMappers = mMappers.size();
1138    for (size_t i = 0; i < numMappers; i++) {
1139        InputMapper* mapper = mMappers[i];
1140        mapper->vibrate(pattern, patternSize, repeat, token);
1141    }
1142}
1143
1144void InputDevice::cancelVibrate(int32_t token) {
1145    size_t numMappers = mMappers.size();
1146    for (size_t i = 0; i < numMappers; i++) {
1147        InputMapper* mapper = mMappers[i];
1148        mapper->cancelVibrate(token);
1149    }
1150}
1151
1152void InputDevice::cancelTouch(nsecs_t when) {
1153    size_t numMappers = mMappers.size();
1154    for (size_t i = 0; i < numMappers; i++) {
1155        InputMapper* mapper = mMappers[i];
1156        mapper->cancelTouch(when);
1157    }
1158}
1159
1160int32_t InputDevice::getMetaState() {
1161    int32_t result = 0;
1162    size_t numMappers = mMappers.size();
1163    for (size_t i = 0; i < numMappers; i++) {
1164        InputMapper* mapper = mMappers[i];
1165        result |= mapper->getMetaState();
1166    }
1167    return result;
1168}
1169
1170void InputDevice::fadePointer() {
1171    size_t numMappers = mMappers.size();
1172    for (size_t i = 0; i < numMappers; i++) {
1173        InputMapper* mapper = mMappers[i];
1174        mapper->fadePointer();
1175    }
1176}
1177
1178void InputDevice::bumpGeneration() {
1179    mGeneration = mContext->bumpGeneration();
1180}
1181
1182void InputDevice::notifyReset(nsecs_t when) {
1183    NotifyDeviceResetArgs args(when, mId);
1184    mContext->getListener()->notifyDeviceReset(&args);
1185}
1186
1187
1188// --- CursorButtonAccumulator ---
1189
1190CursorButtonAccumulator::CursorButtonAccumulator() {
1191    clearButtons();
1192}
1193
1194void CursorButtonAccumulator::reset(InputDevice* device) {
1195    mBtnLeft = device->isKeyPressed(BTN_LEFT);
1196    mBtnRight = device->isKeyPressed(BTN_RIGHT);
1197    mBtnMiddle = device->isKeyPressed(BTN_MIDDLE);
1198    mBtnBack = device->isKeyPressed(BTN_BACK);
1199    mBtnSide = device->isKeyPressed(BTN_SIDE);
1200    mBtnForward = device->isKeyPressed(BTN_FORWARD);
1201    mBtnExtra = device->isKeyPressed(BTN_EXTRA);
1202    mBtnTask = device->isKeyPressed(BTN_TASK);
1203}
1204
1205void CursorButtonAccumulator::clearButtons() {
1206    mBtnLeft = 0;
1207    mBtnRight = 0;
1208    mBtnMiddle = 0;
1209    mBtnBack = 0;
1210    mBtnSide = 0;
1211    mBtnForward = 0;
1212    mBtnExtra = 0;
1213    mBtnTask = 0;
1214}
1215
1216void CursorButtonAccumulator::process(const RawEvent* rawEvent) {
1217    if (rawEvent->type == EV_KEY) {
1218        switch (rawEvent->code) {
1219        case BTN_LEFT:
1220            mBtnLeft = rawEvent->value;
1221            break;
1222        case BTN_RIGHT:
1223            mBtnRight = rawEvent->value;
1224            break;
1225        case BTN_MIDDLE:
1226            mBtnMiddle = rawEvent->value;
1227            break;
1228        case BTN_BACK:
1229            mBtnBack = rawEvent->value;
1230            break;
1231        case BTN_SIDE:
1232            mBtnSide = rawEvent->value;
1233            break;
1234        case BTN_FORWARD:
1235            mBtnForward = rawEvent->value;
1236            break;
1237        case BTN_EXTRA:
1238            mBtnExtra = rawEvent->value;
1239            break;
1240        case BTN_TASK:
1241            mBtnTask = rawEvent->value;
1242            break;
1243        }
1244    }
1245}
1246
1247uint32_t CursorButtonAccumulator::getButtonState() const {
1248    uint32_t result = 0;
1249    if (mBtnLeft) {
1250        result |= AMOTION_EVENT_BUTTON_PRIMARY;
1251    }
1252    if (mBtnRight) {
1253        result |= AMOTION_EVENT_BUTTON_SECONDARY;
1254    }
1255    if (mBtnMiddle) {
1256        result |= AMOTION_EVENT_BUTTON_TERTIARY;
1257    }
1258    if (mBtnBack || mBtnSide) {
1259        result |= AMOTION_EVENT_BUTTON_BACK;
1260    }
1261    if (mBtnForward || mBtnExtra) {
1262        result |= AMOTION_EVENT_BUTTON_FORWARD;
1263    }
1264    return result;
1265}
1266
1267
1268// --- CursorMotionAccumulator ---
1269
1270CursorMotionAccumulator::CursorMotionAccumulator() {
1271    clearRelativeAxes();
1272}
1273
1274void CursorMotionAccumulator::reset(InputDevice* device) {
1275    clearRelativeAxes();
1276}
1277
1278void CursorMotionAccumulator::clearRelativeAxes() {
1279    mRelX = 0;
1280    mRelY = 0;
1281}
1282
1283void CursorMotionAccumulator::process(const RawEvent* rawEvent) {
1284    if (rawEvent->type == EV_REL) {
1285        switch (rawEvent->code) {
1286        case REL_X:
1287            mRelX = rawEvent->value;
1288            break;
1289        case REL_Y:
1290            mRelY = rawEvent->value;
1291            break;
1292        }
1293    }
1294}
1295
1296void CursorMotionAccumulator::finishSync() {
1297    clearRelativeAxes();
1298}
1299
1300
1301// --- CursorScrollAccumulator ---
1302
1303CursorScrollAccumulator::CursorScrollAccumulator() :
1304        mHaveRelWheel(false), mHaveRelHWheel(false) {
1305    clearRelativeAxes();
1306}
1307
1308void CursorScrollAccumulator::configure(InputDevice* device) {
1309    mHaveRelWheel = device->getEventHub()->hasRelativeAxis(device->getId(), REL_WHEEL);
1310    mHaveRelHWheel = device->getEventHub()->hasRelativeAxis(device->getId(), REL_HWHEEL);
1311}
1312
1313void CursorScrollAccumulator::reset(InputDevice* device) {
1314    clearRelativeAxes();
1315}
1316
1317void CursorScrollAccumulator::clearRelativeAxes() {
1318    mRelWheel = 0;
1319    mRelHWheel = 0;
1320}
1321
1322void CursorScrollAccumulator::process(const RawEvent* rawEvent) {
1323    if (rawEvent->type == EV_REL) {
1324        switch (rawEvent->code) {
1325        case REL_WHEEL:
1326            mRelWheel = rawEvent->value;
1327            break;
1328        case REL_HWHEEL:
1329            mRelHWheel = rawEvent->value;
1330            break;
1331        }
1332    }
1333}
1334
1335void CursorScrollAccumulator::finishSync() {
1336    clearRelativeAxes();
1337}
1338
1339
1340// --- TouchButtonAccumulator ---
1341
1342TouchButtonAccumulator::TouchButtonAccumulator() :
1343        mHaveBtnTouch(false), mHaveStylus(false) {
1344    clearButtons();
1345}
1346
1347void TouchButtonAccumulator::configure(InputDevice* device) {
1348    mHaveBtnTouch = device->hasKey(BTN_TOUCH);
1349    mHaveStylus = device->hasKey(BTN_TOOL_PEN)
1350            || device->hasKey(BTN_TOOL_RUBBER)
1351            || device->hasKey(BTN_TOOL_BRUSH)
1352            || device->hasKey(BTN_TOOL_PENCIL)
1353            || device->hasKey(BTN_TOOL_AIRBRUSH);
1354}
1355
1356void TouchButtonAccumulator::reset(InputDevice* device) {
1357    mBtnTouch = device->isKeyPressed(BTN_TOUCH);
1358    mBtnStylus = device->isKeyPressed(BTN_STYLUS);
1359    // BTN_0 is what gets mapped for the HID usage Digitizers.SecondaryBarrelSwitch
1360    mBtnStylus2 =
1361            device->isKeyPressed(BTN_STYLUS2) || device->isKeyPressed(BTN_0);
1362    mBtnToolFinger = device->isKeyPressed(BTN_TOOL_FINGER);
1363    mBtnToolPen = device->isKeyPressed(BTN_TOOL_PEN);
1364    mBtnToolRubber = device->isKeyPressed(BTN_TOOL_RUBBER);
1365    mBtnToolBrush = device->isKeyPressed(BTN_TOOL_BRUSH);
1366    mBtnToolPencil = device->isKeyPressed(BTN_TOOL_PENCIL);
1367    mBtnToolAirbrush = device->isKeyPressed(BTN_TOOL_AIRBRUSH);
1368    mBtnToolMouse = device->isKeyPressed(BTN_TOOL_MOUSE);
1369    mBtnToolLens = device->isKeyPressed(BTN_TOOL_LENS);
1370    mBtnToolDoubleTap = device->isKeyPressed(BTN_TOOL_DOUBLETAP);
1371    mBtnToolTripleTap = device->isKeyPressed(BTN_TOOL_TRIPLETAP);
1372    mBtnToolQuadTap = device->isKeyPressed(BTN_TOOL_QUADTAP);
1373}
1374
1375void TouchButtonAccumulator::clearButtons() {
1376    mBtnTouch = 0;
1377    mBtnStylus = 0;
1378    mBtnStylus2 = 0;
1379    mBtnToolFinger = 0;
1380    mBtnToolPen = 0;
1381    mBtnToolRubber = 0;
1382    mBtnToolBrush = 0;
1383    mBtnToolPencil = 0;
1384    mBtnToolAirbrush = 0;
1385    mBtnToolMouse = 0;
1386    mBtnToolLens = 0;
1387    mBtnToolDoubleTap = 0;
1388    mBtnToolTripleTap = 0;
1389    mBtnToolQuadTap = 0;
1390}
1391
1392void TouchButtonAccumulator::process(const RawEvent* rawEvent) {
1393    if (rawEvent->type == EV_KEY) {
1394        switch (rawEvent->code) {
1395        case BTN_TOUCH:
1396            mBtnTouch = rawEvent->value;
1397            break;
1398        case BTN_STYLUS:
1399            mBtnStylus = rawEvent->value;
1400            break;
1401        case BTN_STYLUS2:
1402        case BTN_0:// BTN_0 is what gets mapped for the HID usage Digitizers.SecondaryBarrelSwitch
1403            mBtnStylus2 = rawEvent->value;
1404            break;
1405        case BTN_TOOL_FINGER:
1406            mBtnToolFinger = rawEvent->value;
1407            break;
1408        case BTN_TOOL_PEN:
1409            mBtnToolPen = rawEvent->value;
1410            break;
1411        case BTN_TOOL_RUBBER:
1412            mBtnToolRubber = rawEvent->value;
1413            break;
1414        case BTN_TOOL_BRUSH:
1415            mBtnToolBrush = rawEvent->value;
1416            break;
1417        case BTN_TOOL_PENCIL:
1418            mBtnToolPencil = rawEvent->value;
1419            break;
1420        case BTN_TOOL_AIRBRUSH:
1421            mBtnToolAirbrush = rawEvent->value;
1422            break;
1423        case BTN_TOOL_MOUSE:
1424            mBtnToolMouse = rawEvent->value;
1425            break;
1426        case BTN_TOOL_LENS:
1427            mBtnToolLens = rawEvent->value;
1428            break;
1429        case BTN_TOOL_DOUBLETAP:
1430            mBtnToolDoubleTap = rawEvent->value;
1431            break;
1432        case BTN_TOOL_TRIPLETAP:
1433            mBtnToolTripleTap = rawEvent->value;
1434            break;
1435        case BTN_TOOL_QUADTAP:
1436            mBtnToolQuadTap = rawEvent->value;
1437            break;
1438        }
1439    }
1440}
1441
1442uint32_t TouchButtonAccumulator::getButtonState() const {
1443    uint32_t result = 0;
1444    if (mBtnStylus) {
1445        result |= AMOTION_EVENT_BUTTON_SECONDARY;
1446    }
1447    if (mBtnStylus2) {
1448        result |= AMOTION_EVENT_BUTTON_TERTIARY;
1449    }
1450    return result;
1451}
1452
1453int32_t TouchButtonAccumulator::getToolType() const {
1454    if (mBtnToolMouse || mBtnToolLens) {
1455        return AMOTION_EVENT_TOOL_TYPE_MOUSE;
1456    }
1457    if (mBtnToolRubber) {
1458        return AMOTION_EVENT_TOOL_TYPE_ERASER;
1459    }
1460    if (mBtnToolPen || mBtnToolBrush || mBtnToolPencil || mBtnToolAirbrush) {
1461        return AMOTION_EVENT_TOOL_TYPE_STYLUS;
1462    }
1463    if (mBtnToolFinger || mBtnToolDoubleTap || mBtnToolTripleTap || mBtnToolQuadTap) {
1464        return AMOTION_EVENT_TOOL_TYPE_FINGER;
1465    }
1466    return AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
1467}
1468
1469bool TouchButtonAccumulator::isToolActive() const {
1470    return mBtnTouch || mBtnToolFinger || mBtnToolPen || mBtnToolRubber
1471            || mBtnToolBrush || mBtnToolPencil || mBtnToolAirbrush
1472            || mBtnToolMouse || mBtnToolLens
1473            || mBtnToolDoubleTap || mBtnToolTripleTap || mBtnToolQuadTap;
1474}
1475
1476bool TouchButtonAccumulator::isHovering() const {
1477    return mHaveBtnTouch && !mBtnTouch;
1478}
1479
1480bool TouchButtonAccumulator::hasStylus() const {
1481    return mHaveStylus;
1482}
1483
1484
1485// --- RawPointerAxes ---
1486
1487RawPointerAxes::RawPointerAxes() {
1488    clear();
1489}
1490
1491void RawPointerAxes::clear() {
1492    x.clear();
1493    y.clear();
1494    pressure.clear();
1495    touchMajor.clear();
1496    touchMinor.clear();
1497    toolMajor.clear();
1498    toolMinor.clear();
1499    orientation.clear();
1500    distance.clear();
1501    tiltX.clear();
1502    tiltY.clear();
1503    trackingId.clear();
1504    slot.clear();
1505}
1506
1507
1508// --- RawPointerData ---
1509
1510RawPointerData::RawPointerData() {
1511    clear();
1512}
1513
1514void RawPointerData::clear() {
1515    pointerCount = 0;
1516    clearIdBits();
1517}
1518
1519void RawPointerData::copyFrom(const RawPointerData& other) {
1520    pointerCount = other.pointerCount;
1521    hoveringIdBits = other.hoveringIdBits;
1522    touchingIdBits = other.touchingIdBits;
1523
1524    for (uint32_t i = 0; i < pointerCount; i++) {
1525        pointers[i] = other.pointers[i];
1526
1527        int id = pointers[i].id;
1528        idToIndex[id] = other.idToIndex[id];
1529    }
1530}
1531
1532void RawPointerData::getCentroidOfTouchingPointers(float* outX, float* outY) const {
1533    float x = 0, y = 0;
1534    uint32_t count = touchingIdBits.count();
1535    if (count) {
1536        for (BitSet32 idBits(touchingIdBits); !idBits.isEmpty(); ) {
1537            uint32_t id = idBits.clearFirstMarkedBit();
1538            const Pointer& pointer = pointerForId(id);
1539            x += pointer.x;
1540            y += pointer.y;
1541        }
1542        x /= count;
1543        y /= count;
1544    }
1545    *outX = x;
1546    *outY = y;
1547}
1548
1549
1550// --- CookedPointerData ---
1551
1552CookedPointerData::CookedPointerData() {
1553    clear();
1554}
1555
1556void CookedPointerData::clear() {
1557    pointerCount = 0;
1558    hoveringIdBits.clear();
1559    touchingIdBits.clear();
1560}
1561
1562void CookedPointerData::copyFrom(const CookedPointerData& other) {
1563    pointerCount = other.pointerCount;
1564    hoveringIdBits = other.hoveringIdBits;
1565    touchingIdBits = other.touchingIdBits;
1566
1567    for (uint32_t i = 0; i < pointerCount; i++) {
1568        pointerProperties[i].copyFrom(other.pointerProperties[i]);
1569        pointerCoords[i].copyFrom(other.pointerCoords[i]);
1570
1571        int id = pointerProperties[i].id;
1572        idToIndex[id] = other.idToIndex[id];
1573    }
1574}
1575
1576
1577// --- SingleTouchMotionAccumulator ---
1578
1579SingleTouchMotionAccumulator::SingleTouchMotionAccumulator() {
1580    clearAbsoluteAxes();
1581}
1582
1583void SingleTouchMotionAccumulator::reset(InputDevice* device) {
1584    mAbsX = device->getAbsoluteAxisValue(ABS_X);
1585    mAbsY = device->getAbsoluteAxisValue(ABS_Y);
1586    mAbsPressure = device->getAbsoluteAxisValue(ABS_PRESSURE);
1587    mAbsToolWidth = device->getAbsoluteAxisValue(ABS_TOOL_WIDTH);
1588    mAbsDistance = device->getAbsoluteAxisValue(ABS_DISTANCE);
1589    mAbsTiltX = device->getAbsoluteAxisValue(ABS_TILT_X);
1590    mAbsTiltY = device->getAbsoluteAxisValue(ABS_TILT_Y);
1591}
1592
1593void SingleTouchMotionAccumulator::clearAbsoluteAxes() {
1594    mAbsX = 0;
1595    mAbsY = 0;
1596    mAbsPressure = 0;
1597    mAbsToolWidth = 0;
1598    mAbsDistance = 0;
1599    mAbsTiltX = 0;
1600    mAbsTiltY = 0;
1601}
1602
1603void SingleTouchMotionAccumulator::process(const RawEvent* rawEvent) {
1604    if (rawEvent->type == EV_ABS) {
1605        switch (rawEvent->code) {
1606        case ABS_X:
1607            mAbsX = rawEvent->value;
1608            break;
1609        case ABS_Y:
1610            mAbsY = rawEvent->value;
1611            break;
1612        case ABS_PRESSURE:
1613            mAbsPressure = rawEvent->value;
1614            break;
1615        case ABS_TOOL_WIDTH:
1616            mAbsToolWidth = rawEvent->value;
1617            break;
1618        case ABS_DISTANCE:
1619            mAbsDistance = rawEvent->value;
1620            break;
1621        case ABS_TILT_X:
1622            mAbsTiltX = rawEvent->value;
1623            break;
1624        case ABS_TILT_Y:
1625            mAbsTiltY = rawEvent->value;
1626            break;
1627        }
1628    }
1629}
1630
1631
1632// --- MultiTouchMotionAccumulator ---
1633
1634MultiTouchMotionAccumulator::MultiTouchMotionAccumulator() :
1635        mCurrentSlot(-1), mSlots(NULL), mSlotCount(0), mUsingSlotsProtocol(false),
1636        mHaveStylus(false) {
1637}
1638
1639MultiTouchMotionAccumulator::~MultiTouchMotionAccumulator() {
1640    delete[] mSlots;
1641}
1642
1643void MultiTouchMotionAccumulator::configure(InputDevice* device,
1644        size_t slotCount, bool usingSlotsProtocol) {
1645    mSlotCount = slotCount;
1646    mUsingSlotsProtocol = usingSlotsProtocol;
1647    mHaveStylus = device->hasAbsoluteAxis(ABS_MT_TOOL_TYPE);
1648
1649    delete[] mSlots;
1650    mSlots = new Slot[slotCount];
1651}
1652
1653void MultiTouchMotionAccumulator::reset(InputDevice* device) {
1654    // Unfortunately there is no way to read the initial contents of the slots.
1655    // So when we reset the accumulator, we must assume they are all zeroes.
1656    if (mUsingSlotsProtocol) {
1657        // Query the driver for the current slot index and use it as the initial slot
1658        // before we start reading events from the device.  It is possible that the
1659        // current slot index will not be the same as it was when the first event was
1660        // written into the evdev buffer, which means the input mapper could start
1661        // out of sync with the initial state of the events in the evdev buffer.
1662        // In the extremely unlikely case that this happens, the data from
1663        // two slots will be confused until the next ABS_MT_SLOT event is received.
1664        // This can cause the touch point to "jump", but at least there will be
1665        // no stuck touches.
1666        int32_t initialSlot;
1667        status_t status = device->getEventHub()->getAbsoluteAxisValue(device->getId(),
1668                ABS_MT_SLOT, &initialSlot);
1669        if (status) {
1670            ALOGD("Could not retrieve current multitouch slot index.  status=%d", status);
1671            initialSlot = -1;
1672        }
1673        clearSlots(initialSlot);
1674    } else {
1675        clearSlots(-1);
1676    }
1677}
1678
1679void MultiTouchMotionAccumulator::clearSlots(int32_t initialSlot) {
1680    if (mSlots) {
1681        for (size_t i = 0; i < mSlotCount; i++) {
1682            mSlots[i].clear();
1683        }
1684    }
1685    mCurrentSlot = initialSlot;
1686}
1687
1688void MultiTouchMotionAccumulator::process(const RawEvent* rawEvent) {
1689    if (rawEvent->type == EV_ABS) {
1690        bool newSlot = false;
1691        if (mUsingSlotsProtocol) {
1692            if (rawEvent->code == ABS_MT_SLOT) {
1693                mCurrentSlot = rawEvent->value;
1694                newSlot = true;
1695            }
1696        } else if (mCurrentSlot < 0) {
1697            mCurrentSlot = 0;
1698        }
1699
1700        if (mCurrentSlot < 0 || size_t(mCurrentSlot) >= mSlotCount) {
1701#if DEBUG_POINTERS
1702            if (newSlot) {
1703                ALOGW("MultiTouch device emitted invalid slot index %d but it "
1704                        "should be between 0 and %d; ignoring this slot.",
1705                        mCurrentSlot, mSlotCount - 1);
1706            }
1707#endif
1708        } else {
1709            Slot* slot = &mSlots[mCurrentSlot];
1710
1711            switch (rawEvent->code) {
1712            case ABS_MT_POSITION_X:
1713                slot->mInUse = true;
1714                slot->mAbsMTPositionX = rawEvent->value;
1715                break;
1716            case ABS_MT_POSITION_Y:
1717                slot->mInUse = true;
1718                slot->mAbsMTPositionY = rawEvent->value;
1719                break;
1720            case ABS_MT_TOUCH_MAJOR:
1721                slot->mInUse = true;
1722                slot->mAbsMTTouchMajor = rawEvent->value;
1723                break;
1724            case ABS_MT_TOUCH_MINOR:
1725                slot->mInUse = true;
1726                slot->mAbsMTTouchMinor = rawEvent->value;
1727                slot->mHaveAbsMTTouchMinor = true;
1728                break;
1729            case ABS_MT_WIDTH_MAJOR:
1730                slot->mInUse = true;
1731                slot->mAbsMTWidthMajor = rawEvent->value;
1732                break;
1733            case ABS_MT_WIDTH_MINOR:
1734                slot->mInUse = true;
1735                slot->mAbsMTWidthMinor = rawEvent->value;
1736                slot->mHaveAbsMTWidthMinor = true;
1737                break;
1738            case ABS_MT_ORIENTATION:
1739                slot->mInUse = true;
1740                slot->mAbsMTOrientation = rawEvent->value;
1741                break;
1742            case ABS_MT_TRACKING_ID:
1743                if (mUsingSlotsProtocol && rawEvent->value < 0) {
1744                    // The slot is no longer in use but it retains its previous contents,
1745                    // which may be reused for subsequent touches.
1746                    slot->mInUse = false;
1747                } else {
1748                    slot->mInUse = true;
1749                    slot->mAbsMTTrackingId = rawEvent->value;
1750                }
1751                break;
1752            case ABS_MT_PRESSURE:
1753                slot->mInUse = true;
1754                slot->mAbsMTPressure = rawEvent->value;
1755                break;
1756            case ABS_MT_DISTANCE:
1757                slot->mInUse = true;
1758                slot->mAbsMTDistance = rawEvent->value;
1759                break;
1760            case ABS_MT_TOOL_TYPE:
1761                slot->mInUse = true;
1762                slot->mAbsMTToolType = rawEvent->value;
1763                slot->mHaveAbsMTToolType = true;
1764                break;
1765            }
1766        }
1767    } else if (rawEvent->type == EV_SYN && rawEvent->code == SYN_MT_REPORT) {
1768        // MultiTouch Sync: The driver has returned all data for *one* of the pointers.
1769        mCurrentSlot += 1;
1770    }
1771}
1772
1773void MultiTouchMotionAccumulator::finishSync() {
1774    if (!mUsingSlotsProtocol) {
1775        clearSlots(-1);
1776    }
1777}
1778
1779bool MultiTouchMotionAccumulator::hasStylus() const {
1780    return mHaveStylus;
1781}
1782
1783
1784// --- MultiTouchMotionAccumulator::Slot ---
1785
1786MultiTouchMotionAccumulator::Slot::Slot() {
1787    clear();
1788}
1789
1790void MultiTouchMotionAccumulator::Slot::clear() {
1791    mInUse = false;
1792    mHaveAbsMTTouchMinor = false;
1793    mHaveAbsMTWidthMinor = false;
1794    mHaveAbsMTToolType = false;
1795    mAbsMTPositionX = 0;
1796    mAbsMTPositionY = 0;
1797    mAbsMTTouchMajor = 0;
1798    mAbsMTTouchMinor = 0;
1799    mAbsMTWidthMajor = 0;
1800    mAbsMTWidthMinor = 0;
1801    mAbsMTOrientation = 0;
1802    mAbsMTTrackingId = -1;
1803    mAbsMTPressure = 0;
1804    mAbsMTDistance = 0;
1805    mAbsMTToolType = 0;
1806}
1807
1808int32_t MultiTouchMotionAccumulator::Slot::getToolType() const {
1809    if (mHaveAbsMTToolType) {
1810        switch (mAbsMTToolType) {
1811        case MT_TOOL_FINGER:
1812            return AMOTION_EVENT_TOOL_TYPE_FINGER;
1813        case MT_TOOL_PEN:
1814            return AMOTION_EVENT_TOOL_TYPE_STYLUS;
1815        }
1816    }
1817    return AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
1818}
1819
1820
1821// --- InputMapper ---
1822
1823InputMapper::InputMapper(InputDevice* device) :
1824        mDevice(device), mContext(device->getContext()) {
1825}
1826
1827InputMapper::~InputMapper() {
1828}
1829
1830void InputMapper::populateDeviceInfo(InputDeviceInfo* info) {
1831    info->addSource(getSources());
1832}
1833
1834void InputMapper::dump(String8& dump) {
1835}
1836
1837void InputMapper::configure(nsecs_t when,
1838        const InputReaderConfiguration* config, uint32_t changes) {
1839}
1840
1841void InputMapper::reset(nsecs_t when) {
1842}
1843
1844void InputMapper::timeoutExpired(nsecs_t when) {
1845}
1846
1847int32_t InputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
1848    return AKEY_STATE_UNKNOWN;
1849}
1850
1851int32_t InputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
1852    return AKEY_STATE_UNKNOWN;
1853}
1854
1855int32_t InputMapper::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
1856    return AKEY_STATE_UNKNOWN;
1857}
1858
1859bool InputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
1860        const int32_t* keyCodes, uint8_t* outFlags) {
1861    return false;
1862}
1863
1864void InputMapper::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
1865        int32_t token) {
1866}
1867
1868void InputMapper::cancelVibrate(int32_t token) {
1869}
1870
1871void InputMapper::cancelTouch(nsecs_t when) {
1872}
1873
1874int32_t InputMapper::getMetaState() {
1875    return 0;
1876}
1877
1878void InputMapper::updateExternalStylusState(const StylusState& state) {
1879
1880}
1881
1882void InputMapper::fadePointer() {
1883}
1884
1885status_t InputMapper::getAbsoluteAxisInfo(int32_t axis, RawAbsoluteAxisInfo* axisInfo) {
1886    return getEventHub()->getAbsoluteAxisInfo(getDeviceId(), axis, axisInfo);
1887}
1888
1889void InputMapper::bumpGeneration() {
1890    mDevice->bumpGeneration();
1891}
1892
1893void InputMapper::dumpRawAbsoluteAxisInfo(String8& dump,
1894        const RawAbsoluteAxisInfo& axis, const char* name) {
1895    if (axis.valid) {
1896        dump.appendFormat(INDENT4 "%s: min=%d, max=%d, flat=%d, fuzz=%d, resolution=%d\n",
1897                name, axis.minValue, axis.maxValue, axis.flat, axis.fuzz, axis.resolution);
1898    } else {
1899        dump.appendFormat(INDENT4 "%s: unknown range\n", name);
1900    }
1901}
1902
1903void InputMapper::dumpStylusState(String8& dump, const StylusState& state) {
1904    dump.appendFormat(INDENT4 "When: %" PRId64 "\n", state.when);
1905    dump.appendFormat(INDENT4 "Pressure: %f\n", state.pressure);
1906    dump.appendFormat(INDENT4 "Button State: 0x%08x\n", state.buttons);
1907    dump.appendFormat(INDENT4 "Tool Type: %" PRId32 "\n", state.toolType);
1908}
1909
1910// --- SwitchInputMapper ---
1911
1912SwitchInputMapper::SwitchInputMapper(InputDevice* device) :
1913        InputMapper(device), mSwitchValues(0), mUpdatedSwitchMask(0) {
1914}
1915
1916SwitchInputMapper::~SwitchInputMapper() {
1917}
1918
1919uint32_t SwitchInputMapper::getSources() {
1920    return AINPUT_SOURCE_SWITCH;
1921}
1922
1923void SwitchInputMapper::process(const RawEvent* rawEvent) {
1924    switch (rawEvent->type) {
1925    case EV_SW:
1926        processSwitch(rawEvent->code, rawEvent->value);
1927        break;
1928
1929    case EV_SYN:
1930        if (rawEvent->code == SYN_REPORT) {
1931            sync(rawEvent->when);
1932        }
1933    }
1934}
1935
1936void SwitchInputMapper::processSwitch(int32_t switchCode, int32_t switchValue) {
1937    if (switchCode >= 0 && switchCode < 32) {
1938        if (switchValue) {
1939            mSwitchValues |= 1 << switchCode;
1940        } else {
1941            mSwitchValues &= ~(1 << switchCode);
1942        }
1943        mUpdatedSwitchMask |= 1 << switchCode;
1944    }
1945}
1946
1947void SwitchInputMapper::sync(nsecs_t when) {
1948    if (mUpdatedSwitchMask) {
1949        uint32_t updatedSwitchValues = mSwitchValues & mUpdatedSwitchMask;
1950        NotifySwitchArgs args(when, 0, updatedSwitchValues, mUpdatedSwitchMask);
1951        getListener()->notifySwitch(&args);
1952
1953        mUpdatedSwitchMask = 0;
1954    }
1955}
1956
1957int32_t SwitchInputMapper::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
1958    return getEventHub()->getSwitchState(getDeviceId(), switchCode);
1959}
1960
1961void SwitchInputMapper::dump(String8& dump) {
1962    dump.append(INDENT2 "Switch Input Mapper:\n");
1963    dump.appendFormat(INDENT3 "SwitchValues: %x\n", mSwitchValues);
1964}
1965
1966// --- VibratorInputMapper ---
1967
1968VibratorInputMapper::VibratorInputMapper(InputDevice* device) :
1969        InputMapper(device), mVibrating(false) {
1970}
1971
1972VibratorInputMapper::~VibratorInputMapper() {
1973}
1974
1975uint32_t VibratorInputMapper::getSources() {
1976    return 0;
1977}
1978
1979void VibratorInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
1980    InputMapper::populateDeviceInfo(info);
1981
1982    info->setVibrator(true);
1983}
1984
1985void VibratorInputMapper::process(const RawEvent* rawEvent) {
1986    // TODO: Handle FF_STATUS, although it does not seem to be widely supported.
1987}
1988
1989void VibratorInputMapper::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
1990        int32_t token) {
1991#if DEBUG_VIBRATOR
1992    String8 patternStr;
1993    for (size_t i = 0; i < patternSize; i++) {
1994        if (i != 0) {
1995            patternStr.append(", ");
1996        }
1997        patternStr.appendFormat("%lld", pattern[i]);
1998    }
1999    ALOGD("vibrate: deviceId=%d, pattern=[%s], repeat=%ld, token=%d",
2000            getDeviceId(), patternStr.string(), repeat, token);
2001#endif
2002
2003    mVibrating = true;
2004    memcpy(mPattern, pattern, patternSize * sizeof(nsecs_t));
2005    mPatternSize = patternSize;
2006    mRepeat = repeat;
2007    mToken = token;
2008    mIndex = -1;
2009
2010    nextStep();
2011}
2012
2013void VibratorInputMapper::cancelVibrate(int32_t token) {
2014#if DEBUG_VIBRATOR
2015    ALOGD("cancelVibrate: deviceId=%d, token=%d", getDeviceId(), token);
2016#endif
2017
2018    if (mVibrating && mToken == token) {
2019        stopVibrating();
2020    }
2021}
2022
2023void VibratorInputMapper::timeoutExpired(nsecs_t when) {
2024    if (mVibrating) {
2025        if (when >= mNextStepTime) {
2026            nextStep();
2027        } else {
2028            getContext()->requestTimeoutAtTime(mNextStepTime);
2029        }
2030    }
2031}
2032
2033void VibratorInputMapper::nextStep() {
2034    mIndex += 1;
2035    if (size_t(mIndex) >= mPatternSize) {
2036        if (mRepeat < 0) {
2037            // We are done.
2038            stopVibrating();
2039            return;
2040        }
2041        mIndex = mRepeat;
2042    }
2043
2044    bool vibratorOn = mIndex & 1;
2045    nsecs_t duration = mPattern[mIndex];
2046    if (vibratorOn) {
2047#if DEBUG_VIBRATOR
2048        ALOGD("nextStep: sending vibrate deviceId=%d, duration=%lld",
2049                getDeviceId(), duration);
2050#endif
2051        getEventHub()->vibrate(getDeviceId(), duration);
2052    } else {
2053#if DEBUG_VIBRATOR
2054        ALOGD("nextStep: sending cancel vibrate deviceId=%d", getDeviceId());
2055#endif
2056        getEventHub()->cancelVibrate(getDeviceId());
2057    }
2058    nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
2059    mNextStepTime = now + duration;
2060    getContext()->requestTimeoutAtTime(mNextStepTime);
2061#if DEBUG_VIBRATOR
2062    ALOGD("nextStep: scheduled timeout in %0.3fms", duration * 0.000001f);
2063#endif
2064}
2065
2066void VibratorInputMapper::stopVibrating() {
2067    mVibrating = false;
2068#if DEBUG_VIBRATOR
2069    ALOGD("stopVibrating: sending cancel vibrate deviceId=%d", getDeviceId());
2070#endif
2071    getEventHub()->cancelVibrate(getDeviceId());
2072}
2073
2074void VibratorInputMapper::dump(String8& dump) {
2075    dump.append(INDENT2 "Vibrator Input Mapper:\n");
2076    dump.appendFormat(INDENT3 "Vibrating: %s\n", toString(mVibrating));
2077}
2078
2079
2080// --- KeyboardInputMapper ---
2081
2082KeyboardInputMapper::KeyboardInputMapper(InputDevice* device,
2083        uint32_t source, int32_t keyboardType) :
2084        InputMapper(device), mSource(source),
2085        mKeyboardType(keyboardType) {
2086}
2087
2088KeyboardInputMapper::~KeyboardInputMapper() {
2089}
2090
2091uint32_t KeyboardInputMapper::getSources() {
2092    return mSource;
2093}
2094
2095void KeyboardInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
2096    InputMapper::populateDeviceInfo(info);
2097
2098    info->setKeyboardType(mKeyboardType);
2099    info->setKeyCharacterMap(getEventHub()->getKeyCharacterMap(getDeviceId()));
2100}
2101
2102void KeyboardInputMapper::dump(String8& dump) {
2103    dump.append(INDENT2 "Keyboard Input Mapper:\n");
2104    dumpParameters(dump);
2105    dump.appendFormat(INDENT3 "KeyboardType: %d\n", mKeyboardType);
2106    dump.appendFormat(INDENT3 "Orientation: %d\n", mOrientation);
2107    dump.appendFormat(INDENT3 "KeyDowns: %zu keys currently down\n", mKeyDowns.size());
2108    dump.appendFormat(INDENT3 "MetaState: 0x%0x\n", mMetaState);
2109    dump.appendFormat(INDENT3 "DownTime: %lld\n", (long long)mDownTime);
2110}
2111
2112
2113void KeyboardInputMapper::configure(nsecs_t when,
2114        const InputReaderConfiguration* config, uint32_t changes) {
2115    InputMapper::configure(when, config, changes);
2116
2117    if (!changes) { // first time only
2118        // Configure basic parameters.
2119        configureParameters();
2120    }
2121
2122    if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {
2123        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
2124            DisplayViewport v;
2125            if (config->getDisplayInfo(false /*external*/, &v)) {
2126                mOrientation = v.orientation;
2127            } else {
2128                mOrientation = DISPLAY_ORIENTATION_0;
2129            }
2130        } else {
2131            mOrientation = DISPLAY_ORIENTATION_0;
2132        }
2133    }
2134}
2135
2136void KeyboardInputMapper::configureParameters() {
2137    mParameters.orientationAware = false;
2138    getDevice()->getConfiguration().tryGetProperty(String8("keyboard.orientationAware"),
2139            mParameters.orientationAware);
2140
2141    mParameters.hasAssociatedDisplay = false;
2142    if (mParameters.orientationAware) {
2143        mParameters.hasAssociatedDisplay = true;
2144    }
2145
2146    mParameters.handlesKeyRepeat = false;
2147    getDevice()->getConfiguration().tryGetProperty(String8("keyboard.handlesKeyRepeat"),
2148            mParameters.handlesKeyRepeat);
2149}
2150
2151void KeyboardInputMapper::dumpParameters(String8& dump) {
2152    dump.append(INDENT3 "Parameters:\n");
2153    dump.appendFormat(INDENT4 "HasAssociatedDisplay: %s\n",
2154            toString(mParameters.hasAssociatedDisplay));
2155    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
2156            toString(mParameters.orientationAware));
2157    dump.appendFormat(INDENT4 "HandlesKeyRepeat: %s\n",
2158            toString(mParameters.handlesKeyRepeat));
2159}
2160
2161void KeyboardInputMapper::reset(nsecs_t when) {
2162    mMetaState = AMETA_NONE;
2163    mDownTime = 0;
2164    mKeyDowns.clear();
2165    mCurrentHidUsage = 0;
2166
2167    resetLedState();
2168
2169    InputMapper::reset(when);
2170}
2171
2172void KeyboardInputMapper::process(const RawEvent* rawEvent) {
2173    switch (rawEvent->type) {
2174    case EV_KEY: {
2175        int32_t scanCode = rawEvent->code;
2176        int32_t usageCode = mCurrentHidUsage;
2177        mCurrentHidUsage = 0;
2178
2179        if (isKeyboardOrGamepadKey(scanCode)) {
2180            int32_t keyCode;
2181            uint32_t flags;
2182            if (getEventHub()->mapKey(getDeviceId(), scanCode, usageCode, &keyCode, &flags)) {
2183                keyCode = AKEYCODE_UNKNOWN;
2184                flags = 0;
2185            }
2186            processKey(rawEvent->when, rawEvent->value != 0, keyCode, scanCode, flags);
2187        }
2188        break;
2189    }
2190    case EV_MSC: {
2191        if (rawEvent->code == MSC_SCAN) {
2192            mCurrentHidUsage = rawEvent->value;
2193        }
2194        break;
2195    }
2196    case EV_SYN: {
2197        if (rawEvent->code == SYN_REPORT) {
2198            mCurrentHidUsage = 0;
2199        }
2200    }
2201    }
2202}
2203
2204bool KeyboardInputMapper::isKeyboardOrGamepadKey(int32_t scanCode) {
2205    return scanCode < BTN_MOUSE
2206        || scanCode >= KEY_OK
2207        || (scanCode >= BTN_MISC && scanCode < BTN_MOUSE)
2208        || (scanCode >= BTN_JOYSTICK && scanCode < BTN_DIGI);
2209}
2210
2211void KeyboardInputMapper::processKey(nsecs_t when, bool down, int32_t keyCode,
2212        int32_t scanCode, uint32_t policyFlags) {
2213
2214    if (down) {
2215        // Rotate key codes according to orientation if needed.
2216        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
2217            keyCode = rotateKeyCode(keyCode, mOrientation);
2218        }
2219
2220        // Add key down.
2221        ssize_t keyDownIndex = findKeyDown(scanCode);
2222        if (keyDownIndex >= 0) {
2223            // key repeat, be sure to use same keycode as before in case of rotation
2224            keyCode = mKeyDowns.itemAt(keyDownIndex).keyCode;
2225        } else {
2226            // key down
2227            if ((policyFlags & POLICY_FLAG_VIRTUAL)
2228                    && mContext->shouldDropVirtualKey(when,
2229                            getDevice(), keyCode, scanCode)) {
2230                return;
2231            }
2232            if (policyFlags & POLICY_FLAG_GESTURE) {
2233                mDevice->cancelTouch(when);
2234            }
2235
2236            mKeyDowns.push();
2237            KeyDown& keyDown = mKeyDowns.editTop();
2238            keyDown.keyCode = keyCode;
2239            keyDown.scanCode = scanCode;
2240        }
2241
2242        mDownTime = when;
2243    } else {
2244        // Remove key down.
2245        ssize_t keyDownIndex = findKeyDown(scanCode);
2246        if (keyDownIndex >= 0) {
2247            // key up, be sure to use same keycode as before in case of rotation
2248            keyCode = mKeyDowns.itemAt(keyDownIndex).keyCode;
2249            mKeyDowns.removeAt(size_t(keyDownIndex));
2250        } else {
2251            // key was not actually down
2252            ALOGI("Dropping key up from device %s because the key was not down.  "
2253                    "keyCode=%d, scanCode=%d",
2254                    getDeviceName().string(), keyCode, scanCode);
2255            return;
2256        }
2257    }
2258
2259    int32_t oldMetaState = mMetaState;
2260    int32_t newMetaState = updateMetaState(keyCode, down, oldMetaState);
2261    bool metaStateChanged = oldMetaState != newMetaState;
2262    if (metaStateChanged) {
2263        mMetaState = newMetaState;
2264        updateLedState(false);
2265    }
2266
2267    nsecs_t downTime = mDownTime;
2268
2269    // Key down on external an keyboard should wake the device.
2270    // We don't do this for internal keyboards to prevent them from waking up in your pocket.
2271    // For internal keyboards, the key layout file should specify the policy flags for
2272    // each wake key individually.
2273    // TODO: Use the input device configuration to control this behavior more finely.
2274    if (down && getDevice()->isExternal()) {
2275        policyFlags |= POLICY_FLAG_WAKE;
2276    }
2277
2278    if (mParameters.handlesKeyRepeat) {
2279        policyFlags |= POLICY_FLAG_DISABLE_KEY_REPEAT;
2280    }
2281
2282    if (metaStateChanged) {
2283        getContext()->updateGlobalMetaState();
2284    }
2285
2286    if (down && !isMetaKey(keyCode)) {
2287        getContext()->fadePointer();
2288    }
2289
2290    NotifyKeyArgs args(when, getDeviceId(), mSource, policyFlags,
2291            down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP,
2292            AKEY_EVENT_FLAG_FROM_SYSTEM, keyCode, scanCode, newMetaState, downTime);
2293    getListener()->notifyKey(&args);
2294}
2295
2296ssize_t KeyboardInputMapper::findKeyDown(int32_t scanCode) {
2297    size_t n = mKeyDowns.size();
2298    for (size_t i = 0; i < n; i++) {
2299        if (mKeyDowns[i].scanCode == scanCode) {
2300            return i;
2301        }
2302    }
2303    return -1;
2304}
2305
2306int32_t KeyboardInputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
2307    return getEventHub()->getKeyCodeState(getDeviceId(), keyCode);
2308}
2309
2310int32_t KeyboardInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
2311    return getEventHub()->getScanCodeState(getDeviceId(), scanCode);
2312}
2313
2314bool KeyboardInputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
2315        const int32_t* keyCodes, uint8_t* outFlags) {
2316    return getEventHub()->markSupportedKeyCodes(getDeviceId(), numCodes, keyCodes, outFlags);
2317}
2318
2319int32_t KeyboardInputMapper::getMetaState() {
2320    return mMetaState;
2321}
2322
2323void KeyboardInputMapper::resetLedState() {
2324    initializeLedState(mCapsLockLedState, ALED_CAPS_LOCK);
2325    initializeLedState(mNumLockLedState, ALED_NUM_LOCK);
2326    initializeLedState(mScrollLockLedState, ALED_SCROLL_LOCK);
2327
2328    updateLedState(true);
2329}
2330
2331void KeyboardInputMapper::initializeLedState(LedState& ledState, int32_t led) {
2332    ledState.avail = getEventHub()->hasLed(getDeviceId(), led);
2333    ledState.on = false;
2334}
2335
2336void KeyboardInputMapper::updateLedState(bool reset) {
2337    updateLedStateForModifier(mCapsLockLedState, ALED_CAPS_LOCK,
2338            AMETA_CAPS_LOCK_ON, reset);
2339    updateLedStateForModifier(mNumLockLedState, ALED_NUM_LOCK,
2340            AMETA_NUM_LOCK_ON, reset);
2341    updateLedStateForModifier(mScrollLockLedState, ALED_SCROLL_LOCK,
2342            AMETA_SCROLL_LOCK_ON, reset);
2343}
2344
2345void KeyboardInputMapper::updateLedStateForModifier(LedState& ledState,
2346        int32_t led, int32_t modifier, bool reset) {
2347    if (ledState.avail) {
2348        bool desiredState = (mMetaState & modifier) != 0;
2349        if (reset || ledState.on != desiredState) {
2350            getEventHub()->setLedState(getDeviceId(), led, desiredState);
2351            ledState.on = desiredState;
2352        }
2353    }
2354}
2355
2356
2357// --- CursorInputMapper ---
2358
2359CursorInputMapper::CursorInputMapper(InputDevice* device) :
2360        InputMapper(device) {
2361}
2362
2363CursorInputMapper::~CursorInputMapper() {
2364}
2365
2366uint32_t CursorInputMapper::getSources() {
2367    return mSource;
2368}
2369
2370void CursorInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
2371    InputMapper::populateDeviceInfo(info);
2372
2373    if (mParameters.mode == Parameters::MODE_POINTER) {
2374        float minX, minY, maxX, maxY;
2375        if (mPointerController->getBounds(&minX, &minY, &maxX, &maxY)) {
2376            info->addMotionRange(AMOTION_EVENT_AXIS_X, mSource, minX, maxX, 0.0f, 0.0f, 0.0f);
2377            info->addMotionRange(AMOTION_EVENT_AXIS_Y, mSource, minY, maxY, 0.0f, 0.0f, 0.0f);
2378        }
2379    } else {
2380        info->addMotionRange(AMOTION_EVENT_AXIS_X, mSource, -1.0f, 1.0f, 0.0f, mXScale, 0.0f);
2381        info->addMotionRange(AMOTION_EVENT_AXIS_Y, mSource, -1.0f, 1.0f, 0.0f, mYScale, 0.0f);
2382    }
2383    info->addMotionRange(AMOTION_EVENT_AXIS_PRESSURE, mSource, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f);
2384
2385    if (mCursorScrollAccumulator.haveRelativeVWheel()) {
2386        info->addMotionRange(AMOTION_EVENT_AXIS_VSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
2387    }
2388    if (mCursorScrollAccumulator.haveRelativeHWheel()) {
2389        info->addMotionRange(AMOTION_EVENT_AXIS_HSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
2390    }
2391}
2392
2393void CursorInputMapper::dump(String8& dump) {
2394    dump.append(INDENT2 "Cursor Input Mapper:\n");
2395    dumpParameters(dump);
2396    dump.appendFormat(INDENT3 "XScale: %0.3f\n", mXScale);
2397    dump.appendFormat(INDENT3 "YScale: %0.3f\n", mYScale);
2398    dump.appendFormat(INDENT3 "XPrecision: %0.3f\n", mXPrecision);
2399    dump.appendFormat(INDENT3 "YPrecision: %0.3f\n", mYPrecision);
2400    dump.appendFormat(INDENT3 "HaveVWheel: %s\n",
2401            toString(mCursorScrollAccumulator.haveRelativeVWheel()));
2402    dump.appendFormat(INDENT3 "HaveHWheel: %s\n",
2403            toString(mCursorScrollAccumulator.haveRelativeHWheel()));
2404    dump.appendFormat(INDENT3 "VWheelScale: %0.3f\n", mVWheelScale);
2405    dump.appendFormat(INDENT3 "HWheelScale: %0.3f\n", mHWheelScale);
2406    dump.appendFormat(INDENT3 "Orientation: %d\n", mOrientation);
2407    dump.appendFormat(INDENT3 "ButtonState: 0x%08x\n", mButtonState);
2408    dump.appendFormat(INDENT3 "Down: %s\n", toString(isPointerDown(mButtonState)));
2409    dump.appendFormat(INDENT3 "DownTime: %lld\n", (long long)mDownTime);
2410}
2411
2412void CursorInputMapper::configure(nsecs_t when,
2413        const InputReaderConfiguration* config, uint32_t changes) {
2414    InputMapper::configure(when, config, changes);
2415
2416    if (!changes) { // first time only
2417        mCursorScrollAccumulator.configure(getDevice());
2418
2419        // Configure basic parameters.
2420        configureParameters();
2421
2422        // Configure device mode.
2423        switch (mParameters.mode) {
2424        case Parameters::MODE_POINTER:
2425            mSource = AINPUT_SOURCE_MOUSE;
2426            mXPrecision = 1.0f;
2427            mYPrecision = 1.0f;
2428            mXScale = 1.0f;
2429            mYScale = 1.0f;
2430            mPointerController = getPolicy()->obtainPointerController(getDeviceId());
2431            break;
2432        case Parameters::MODE_NAVIGATION:
2433            mSource = AINPUT_SOURCE_TRACKBALL;
2434            mXPrecision = TRACKBALL_MOVEMENT_THRESHOLD;
2435            mYPrecision = TRACKBALL_MOVEMENT_THRESHOLD;
2436            mXScale = 1.0f / TRACKBALL_MOVEMENT_THRESHOLD;
2437            mYScale = 1.0f / TRACKBALL_MOVEMENT_THRESHOLD;
2438            break;
2439        }
2440
2441        mVWheelScale = 1.0f;
2442        mHWheelScale = 1.0f;
2443    }
2444
2445    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {
2446        mPointerVelocityControl.setParameters(config->pointerVelocityControlParameters);
2447        mWheelXVelocityControl.setParameters(config->wheelVelocityControlParameters);
2448        mWheelYVelocityControl.setParameters(config->wheelVelocityControlParameters);
2449    }
2450
2451    if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {
2452        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
2453            DisplayViewport v;
2454            if (config->getDisplayInfo(false /*external*/, &v)) {
2455                mOrientation = v.orientation;
2456            } else {
2457                mOrientation = DISPLAY_ORIENTATION_0;
2458            }
2459        } else {
2460            mOrientation = DISPLAY_ORIENTATION_0;
2461        }
2462        bumpGeneration();
2463    }
2464}
2465
2466void CursorInputMapper::configureParameters() {
2467    mParameters.mode = Parameters::MODE_POINTER;
2468    String8 cursorModeString;
2469    if (getDevice()->getConfiguration().tryGetProperty(String8("cursor.mode"), cursorModeString)) {
2470        if (cursorModeString == "navigation") {
2471            mParameters.mode = Parameters::MODE_NAVIGATION;
2472        } else if (cursorModeString != "pointer" && cursorModeString != "default") {
2473            ALOGW("Invalid value for cursor.mode: '%s'", cursorModeString.string());
2474        }
2475    }
2476
2477    mParameters.orientationAware = false;
2478    getDevice()->getConfiguration().tryGetProperty(String8("cursor.orientationAware"),
2479            mParameters.orientationAware);
2480
2481    mParameters.hasAssociatedDisplay = false;
2482    if (mParameters.mode == Parameters::MODE_POINTER || mParameters.orientationAware) {
2483        mParameters.hasAssociatedDisplay = true;
2484    }
2485}
2486
2487void CursorInputMapper::dumpParameters(String8& dump) {
2488    dump.append(INDENT3 "Parameters:\n");
2489    dump.appendFormat(INDENT4 "HasAssociatedDisplay: %s\n",
2490            toString(mParameters.hasAssociatedDisplay));
2491
2492    switch (mParameters.mode) {
2493    case Parameters::MODE_POINTER:
2494        dump.append(INDENT4 "Mode: pointer\n");
2495        break;
2496    case Parameters::MODE_NAVIGATION:
2497        dump.append(INDENT4 "Mode: navigation\n");
2498        break;
2499    default:
2500        ALOG_ASSERT(false);
2501    }
2502
2503    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
2504            toString(mParameters.orientationAware));
2505}
2506
2507void CursorInputMapper::reset(nsecs_t when) {
2508    mButtonState = 0;
2509    mDownTime = 0;
2510
2511    mPointerVelocityControl.reset();
2512    mWheelXVelocityControl.reset();
2513    mWheelYVelocityControl.reset();
2514
2515    mCursorButtonAccumulator.reset(getDevice());
2516    mCursorMotionAccumulator.reset(getDevice());
2517    mCursorScrollAccumulator.reset(getDevice());
2518
2519    InputMapper::reset(when);
2520}
2521
2522void CursorInputMapper::process(const RawEvent* rawEvent) {
2523    mCursorButtonAccumulator.process(rawEvent);
2524    mCursorMotionAccumulator.process(rawEvent);
2525    mCursorScrollAccumulator.process(rawEvent);
2526
2527    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
2528        sync(rawEvent->when);
2529    }
2530}
2531
2532void CursorInputMapper::sync(nsecs_t when) {
2533    int32_t lastButtonState = mButtonState;
2534    int32_t currentButtonState = mCursorButtonAccumulator.getButtonState();
2535    mButtonState = currentButtonState;
2536
2537    bool wasDown = isPointerDown(lastButtonState);
2538    bool down = isPointerDown(currentButtonState);
2539    bool downChanged;
2540    if (!wasDown && down) {
2541        mDownTime = when;
2542        downChanged = true;
2543    } else if (wasDown && !down) {
2544        downChanged = true;
2545    } else {
2546        downChanged = false;
2547    }
2548    nsecs_t downTime = mDownTime;
2549    bool buttonsChanged = currentButtonState != lastButtonState;
2550    bool buttonsPressed = currentButtonState & ~lastButtonState;
2551
2552    float deltaX = mCursorMotionAccumulator.getRelativeX() * mXScale;
2553    float deltaY = mCursorMotionAccumulator.getRelativeY() * mYScale;
2554    bool moved = deltaX != 0 || deltaY != 0;
2555
2556    // Rotate delta according to orientation if needed.
2557    if (mParameters.orientationAware && mParameters.hasAssociatedDisplay
2558            && (deltaX != 0.0f || deltaY != 0.0f)) {
2559        rotateDelta(mOrientation, &deltaX, &deltaY);
2560    }
2561
2562    // Move the pointer.
2563    PointerProperties pointerProperties;
2564    pointerProperties.clear();
2565    pointerProperties.id = 0;
2566    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_MOUSE;
2567
2568    PointerCoords pointerCoords;
2569    pointerCoords.clear();
2570
2571    float vscroll = mCursorScrollAccumulator.getRelativeVWheel();
2572    float hscroll = mCursorScrollAccumulator.getRelativeHWheel();
2573    bool scrolled = vscroll != 0 || hscroll != 0;
2574
2575    mWheelYVelocityControl.move(when, NULL, &vscroll);
2576    mWheelXVelocityControl.move(when, &hscroll, NULL);
2577
2578    mPointerVelocityControl.move(when, &deltaX, &deltaY);
2579
2580    int32_t displayId;
2581    if (mPointerController != NULL) {
2582        if (moved || scrolled || buttonsChanged) {
2583            mPointerController->setPresentation(
2584                    PointerControllerInterface::PRESENTATION_POINTER);
2585
2586            if (moved) {
2587                mPointerController->move(deltaX, deltaY);
2588            }
2589
2590            if (buttonsChanged) {
2591                mPointerController->setButtonState(currentButtonState);
2592            }
2593
2594            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
2595        }
2596
2597        float x, y;
2598        mPointerController->getPosition(&x, &y);
2599        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
2600        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
2601        displayId = ADISPLAY_ID_DEFAULT;
2602    } else {
2603        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, deltaX);
2604        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, deltaY);
2605        displayId = ADISPLAY_ID_NONE;
2606    }
2607
2608    pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, down ? 1.0f : 0.0f);
2609
2610    // Moving an external trackball or mouse should wake the device.
2611    // We don't do this for internal cursor devices to prevent them from waking up
2612    // the device in your pocket.
2613    // TODO: Use the input device configuration to control this behavior more finely.
2614    uint32_t policyFlags = 0;
2615    if ((buttonsPressed || moved || scrolled) && getDevice()->isExternal()) {
2616        policyFlags |= POLICY_FLAG_WAKE;
2617    }
2618
2619    // Synthesize key down from buttons if needed.
2620    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
2621            policyFlags, lastButtonState, currentButtonState);
2622
2623    // Send motion event.
2624    if (downChanged || moved || scrolled || buttonsChanged) {
2625        int32_t metaState = mContext->getGlobalMetaState();
2626        int32_t motionEventAction;
2627        if (downChanged) {
2628            motionEventAction = down ? AMOTION_EVENT_ACTION_DOWN : AMOTION_EVENT_ACTION_UP;
2629        } else if (down || mPointerController == NULL) {
2630            motionEventAction = AMOTION_EVENT_ACTION_MOVE;
2631        } else {
2632            motionEventAction = AMOTION_EVENT_ACTION_HOVER_MOVE;
2633        }
2634
2635        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
2636                motionEventAction, 0, metaState, currentButtonState, 0,
2637                displayId, 1, &pointerProperties, &pointerCoords,
2638                mXPrecision, mYPrecision, downTime);
2639        getListener()->notifyMotion(&args);
2640
2641        // Send hover move after UP to tell the application that the mouse is hovering now.
2642        if (motionEventAction == AMOTION_EVENT_ACTION_UP
2643                && mPointerController != NULL) {
2644            NotifyMotionArgs hoverArgs(when, getDeviceId(), mSource, policyFlags,
2645                    AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
2646                    metaState, currentButtonState, AMOTION_EVENT_EDGE_FLAG_NONE,
2647                    displayId, 1, &pointerProperties, &pointerCoords,
2648                    mXPrecision, mYPrecision, downTime);
2649            getListener()->notifyMotion(&hoverArgs);
2650        }
2651
2652        // Send scroll events.
2653        if (scrolled) {
2654            pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
2655            pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
2656
2657            NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
2658                    AMOTION_EVENT_ACTION_SCROLL, 0, metaState, currentButtonState,
2659                    AMOTION_EVENT_EDGE_FLAG_NONE,
2660                    displayId, 1, &pointerProperties, &pointerCoords,
2661                    mXPrecision, mYPrecision, downTime);
2662            getListener()->notifyMotion(&scrollArgs);
2663        }
2664    }
2665
2666    // Synthesize key up from buttons if needed.
2667    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
2668            policyFlags, lastButtonState, currentButtonState);
2669
2670    mCursorMotionAccumulator.finishSync();
2671    mCursorScrollAccumulator.finishSync();
2672}
2673
2674int32_t CursorInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
2675    if (scanCode >= BTN_MOUSE && scanCode < BTN_JOYSTICK) {
2676        return getEventHub()->getScanCodeState(getDeviceId(), scanCode);
2677    } else {
2678        return AKEY_STATE_UNKNOWN;
2679    }
2680}
2681
2682void CursorInputMapper::fadePointer() {
2683    if (mPointerController != NULL) {
2684        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
2685    }
2686}
2687
2688
2689// --- TouchInputMapper ---
2690
2691TouchInputMapper::TouchInputMapper(InputDevice* device) :
2692        InputMapper(device),
2693        mSource(0), mDeviceMode(DEVICE_MODE_DISABLED),
2694        mSurfaceWidth(-1), mSurfaceHeight(-1), mSurfaceLeft(0), mSurfaceTop(0),
2695        mSurfaceOrientation(DISPLAY_ORIENTATION_0) {
2696}
2697
2698TouchInputMapper::~TouchInputMapper() {
2699}
2700
2701uint32_t TouchInputMapper::getSources() {
2702    return mSource;
2703}
2704
2705void TouchInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
2706    InputMapper::populateDeviceInfo(info);
2707
2708    if (mDeviceMode != DEVICE_MODE_DISABLED) {
2709        info->addMotionRange(mOrientedRanges.x);
2710        info->addMotionRange(mOrientedRanges.y);
2711        info->addMotionRange(mOrientedRanges.pressure);
2712
2713        if (mOrientedRanges.haveSize) {
2714            info->addMotionRange(mOrientedRanges.size);
2715        }
2716
2717        if (mOrientedRanges.haveTouchSize) {
2718            info->addMotionRange(mOrientedRanges.touchMajor);
2719            info->addMotionRange(mOrientedRanges.touchMinor);
2720        }
2721
2722        if (mOrientedRanges.haveToolSize) {
2723            info->addMotionRange(mOrientedRanges.toolMajor);
2724            info->addMotionRange(mOrientedRanges.toolMinor);
2725        }
2726
2727        if (mOrientedRanges.haveOrientation) {
2728            info->addMotionRange(mOrientedRanges.orientation);
2729        }
2730
2731        if (mOrientedRanges.haveDistance) {
2732            info->addMotionRange(mOrientedRanges.distance);
2733        }
2734
2735        if (mOrientedRanges.haveTilt) {
2736            info->addMotionRange(mOrientedRanges.tilt);
2737        }
2738
2739        if (mCursorScrollAccumulator.haveRelativeVWheel()) {
2740            info->addMotionRange(AMOTION_EVENT_AXIS_VSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
2741                    0.0f);
2742        }
2743        if (mCursorScrollAccumulator.haveRelativeHWheel()) {
2744            info->addMotionRange(AMOTION_EVENT_AXIS_HSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
2745                    0.0f);
2746        }
2747        if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_BOX) {
2748            const InputDeviceInfo::MotionRange& x = mOrientedRanges.x;
2749            const InputDeviceInfo::MotionRange& y = mOrientedRanges.y;
2750            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_1, mSource, x.min, x.max, x.flat,
2751                    x.fuzz, x.resolution);
2752            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_2, mSource, y.min, y.max, y.flat,
2753                    y.fuzz, y.resolution);
2754            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_3, mSource, x.min, x.max, x.flat,
2755                    x.fuzz, x.resolution);
2756            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_4, mSource, y.min, y.max, y.flat,
2757                    y.fuzz, y.resolution);
2758        }
2759        info->setButtonUnderPad(mParameters.hasButtonUnderPad);
2760    }
2761}
2762
2763void TouchInputMapper::dump(String8& dump) {
2764    dump.append(INDENT2 "Touch Input Mapper:\n");
2765    dumpParameters(dump);
2766    dumpVirtualKeys(dump);
2767    dumpRawPointerAxes(dump);
2768    dumpCalibration(dump);
2769    dumpAffineTransformation(dump);
2770    dumpSurface(dump);
2771
2772    dump.appendFormat(INDENT3 "Translation and Scaling Factors:\n");
2773    dump.appendFormat(INDENT4 "XTranslate: %0.3f\n", mXTranslate);
2774    dump.appendFormat(INDENT4 "YTranslate: %0.3f\n", mYTranslate);
2775    dump.appendFormat(INDENT4 "XScale: %0.3f\n", mXScale);
2776    dump.appendFormat(INDENT4 "YScale: %0.3f\n", mYScale);
2777    dump.appendFormat(INDENT4 "XPrecision: %0.3f\n", mXPrecision);
2778    dump.appendFormat(INDENT4 "YPrecision: %0.3f\n", mYPrecision);
2779    dump.appendFormat(INDENT4 "GeometricScale: %0.3f\n", mGeometricScale);
2780    dump.appendFormat(INDENT4 "PressureScale: %0.3f\n", mPressureScale);
2781    dump.appendFormat(INDENT4 "SizeScale: %0.3f\n", mSizeScale);
2782    dump.appendFormat(INDENT4 "OrientationScale: %0.3f\n", mOrientationScale);
2783    dump.appendFormat(INDENT4 "DistanceScale: %0.3f\n", mDistanceScale);
2784    dump.appendFormat(INDENT4 "HaveTilt: %s\n", toString(mHaveTilt));
2785    dump.appendFormat(INDENT4 "TiltXCenter: %0.3f\n", mTiltXCenter);
2786    dump.appendFormat(INDENT4 "TiltXScale: %0.3f\n", mTiltXScale);
2787    dump.appendFormat(INDENT4 "TiltYCenter: %0.3f\n", mTiltYCenter);
2788    dump.appendFormat(INDENT4 "TiltYScale: %0.3f\n", mTiltYScale);
2789
2790    dump.appendFormat(INDENT3 "Last Button State: 0x%08x\n", mLastRawState.buttonState);
2791
2792    dump.appendFormat(INDENT3 "Last Raw Touch: pointerCount=%d\n",
2793            mLastRawState.rawPointerData.pointerCount);
2794    for (uint32_t i = 0; i < mLastRawState.rawPointerData.pointerCount; i++) {
2795        const RawPointerData::Pointer& pointer = mLastRawState.rawPointerData.pointers[i];
2796        dump.appendFormat(INDENT4 "[%d]: id=%d, x=%d, y=%d, pressure=%d, "
2797                "touchMajor=%d, touchMinor=%d, toolMajor=%d, toolMinor=%d, "
2798                "orientation=%d, tiltX=%d, tiltY=%d, distance=%d, "
2799                "toolType=%d, isHovering=%s\n", i,
2800                pointer.id, pointer.x, pointer.y, pointer.pressure,
2801                pointer.touchMajor, pointer.touchMinor,
2802                pointer.toolMajor, pointer.toolMinor,
2803                pointer.orientation, pointer.tiltX, pointer.tiltY, pointer.distance,
2804                pointer.toolType, toString(pointer.isHovering));
2805    }
2806
2807    dump.appendFormat(INDENT3 "Last Cooked Touch: pointerCount=%d\n",
2808            mLastCookedState.cookedPointerData.pointerCount);
2809    for (uint32_t i = 0; i < mLastCookedState.cookedPointerData.pointerCount; i++) {
2810        const PointerProperties& pointerProperties =
2811                mLastCookedState.cookedPointerData.pointerProperties[i];
2812        const PointerCoords& pointerCoords = mLastCookedState.cookedPointerData.pointerCoords[i];
2813        dump.appendFormat(INDENT4 "[%d]: id=%d, x=%0.3f, y=%0.3f, pressure=%0.3f, "
2814                "touchMajor=%0.3f, touchMinor=%0.3f, toolMajor=%0.3f, toolMinor=%0.3f, "
2815                "orientation=%0.3f, tilt=%0.3f, distance=%0.3f, "
2816                "toolType=%d, isHovering=%s\n", i,
2817                pointerProperties.id,
2818                pointerCoords.getX(),
2819                pointerCoords.getY(),
2820                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE),
2821                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR),
2822                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
2823                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
2824                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
2825                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION),
2826                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TILT),
2827                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_DISTANCE),
2828                pointerProperties.toolType,
2829                toString(mLastCookedState.cookedPointerData.isHovering(i)));
2830    }
2831
2832    dump.append(INDENT3 "Stylus Fusion:\n");
2833    dump.appendFormat(INDENT4 "ExternalStylusConnected: %s\n",
2834            toString(mExternalStylusConnected));
2835    dump.appendFormat(INDENT4 "External Stylus ID: %" PRId64 "\n", mExternalStylusId);
2836    dump.appendFormat(INDENT4 "External Stylus Data Timeout: %" PRId64 "\n",
2837            mExternalStylusFusionTimeout);
2838    dump.append(INDENT3 "External Stylus State:\n");
2839    dumpStylusState(dump, mExternalStylusState);
2840
2841    if (mDeviceMode == DEVICE_MODE_POINTER) {
2842        dump.appendFormat(INDENT3 "Pointer Gesture Detector:\n");
2843        dump.appendFormat(INDENT4 "XMovementScale: %0.3f\n",
2844                mPointerXMovementScale);
2845        dump.appendFormat(INDENT4 "YMovementScale: %0.3f\n",
2846                mPointerYMovementScale);
2847        dump.appendFormat(INDENT4 "XZoomScale: %0.3f\n",
2848                mPointerXZoomScale);
2849        dump.appendFormat(INDENT4 "YZoomScale: %0.3f\n",
2850                mPointerYZoomScale);
2851        dump.appendFormat(INDENT4 "MaxSwipeWidth: %f\n",
2852                mPointerGestureMaxSwipeWidth);
2853    }
2854}
2855
2856void TouchInputMapper::configure(nsecs_t when,
2857        const InputReaderConfiguration* config, uint32_t changes) {
2858    InputMapper::configure(when, config, changes);
2859
2860    mConfig = *config;
2861
2862    if (!changes) { // first time only
2863        // Configure basic parameters.
2864        configureParameters();
2865
2866        // Configure common accumulators.
2867        mCursorScrollAccumulator.configure(getDevice());
2868        mTouchButtonAccumulator.configure(getDevice());
2869
2870        // Configure absolute axis information.
2871        configureRawPointerAxes();
2872
2873        // Prepare input device calibration.
2874        parseCalibration();
2875        resolveCalibration();
2876    }
2877
2878    if (!changes || (changes & InputReaderConfiguration::CHANGE_TOUCH_AFFINE_TRANSFORMATION)) {
2879        // Update location calibration to reflect current settings
2880        updateAffineTransformation();
2881    }
2882
2883    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {
2884        // Update pointer speed.
2885        mPointerVelocityControl.setParameters(mConfig.pointerVelocityControlParameters);
2886        mWheelXVelocityControl.setParameters(mConfig.wheelVelocityControlParameters);
2887        mWheelYVelocityControl.setParameters(mConfig.wheelVelocityControlParameters);
2888    }
2889
2890    bool resetNeeded = false;
2891    if (!changes || (changes & (InputReaderConfiguration::CHANGE_DISPLAY_INFO
2892            | InputReaderConfiguration::CHANGE_POINTER_GESTURE_ENABLEMENT
2893            | InputReaderConfiguration::CHANGE_SHOW_TOUCHES
2894            | InputReaderConfiguration::CHANGE_EXTERNAL_STYLUS_PRESENCE))) {
2895        // Configure device sources, surface dimensions, orientation and
2896        // scaling factors.
2897        configureSurface(when, &resetNeeded);
2898    }
2899
2900    if (changes && resetNeeded) {
2901        // Send reset, unless this is the first time the device has been configured,
2902        // in which case the reader will call reset itself after all mappers are ready.
2903        getDevice()->notifyReset(when);
2904    }
2905}
2906
2907void TouchInputMapper::resolveExternalStylusPresence() {
2908    Vector<InputDeviceInfo> devices;
2909    mContext->getExternalStylusDevices(devices);
2910    mExternalStylusConnected = !devices.isEmpty();
2911
2912    if (!mExternalStylusConnected) {
2913        resetExternalStylus();
2914    }
2915}
2916
2917void TouchInputMapper::configureParameters() {
2918    // Use the pointer presentation mode for devices that do not support distinct
2919    // multitouch.  The spot-based presentation relies on being able to accurately
2920    // locate two or more fingers on the touch pad.
2921    mParameters.gestureMode = getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_SEMI_MT)
2922            ? Parameters::GESTURE_MODE_POINTER : Parameters::GESTURE_MODE_SPOTS;
2923
2924    String8 gestureModeString;
2925    if (getDevice()->getConfiguration().tryGetProperty(String8("touch.gestureMode"),
2926            gestureModeString)) {
2927        if (gestureModeString == "pointer") {
2928            mParameters.gestureMode = Parameters::GESTURE_MODE_POINTER;
2929        } else if (gestureModeString == "spots") {
2930            mParameters.gestureMode = Parameters::GESTURE_MODE_SPOTS;
2931        } else if (gestureModeString != "default") {
2932            ALOGW("Invalid value for touch.gestureMode: '%s'", gestureModeString.string());
2933        }
2934    }
2935
2936    if (getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_DIRECT)) {
2937        // The device is a touch screen.
2938        mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_SCREEN;
2939    } else if (getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_POINTER)) {
2940        // The device is a pointing device like a track pad.
2941        mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
2942    } else if (getEventHub()->hasRelativeAxis(getDeviceId(), REL_X)
2943            || getEventHub()->hasRelativeAxis(getDeviceId(), REL_Y)) {
2944        // The device is a cursor device with a touch pad attached.
2945        // By default don't use the touch pad to move the pointer.
2946        mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_PAD;
2947    } else {
2948        // The device is a touch pad of unknown purpose.
2949        mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
2950    }
2951
2952    mParameters.hasButtonUnderPad=
2953            getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_BUTTONPAD);
2954
2955    String8 deviceTypeString;
2956    if (getDevice()->getConfiguration().tryGetProperty(String8("touch.deviceType"),
2957            deviceTypeString)) {
2958        if (deviceTypeString == "touchScreen") {
2959            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_SCREEN;
2960        } else if (deviceTypeString == "touchPad") {
2961            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_PAD;
2962        } else if (deviceTypeString == "touchNavigation") {
2963            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_NAVIGATION;
2964        } else if (deviceTypeString == "pointer") {
2965            mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
2966        } else if (deviceTypeString != "default") {
2967            ALOGW("Invalid value for touch.deviceType: '%s'", deviceTypeString.string());
2968        }
2969    }
2970
2971    mParameters.orientationAware = mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN;
2972    getDevice()->getConfiguration().tryGetProperty(String8("touch.orientationAware"),
2973            mParameters.orientationAware);
2974
2975    mParameters.hasAssociatedDisplay = false;
2976    mParameters.associatedDisplayIsExternal = false;
2977    if (mParameters.orientationAware
2978            || mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
2979            || mParameters.deviceType == Parameters::DEVICE_TYPE_POINTER) {
2980        mParameters.hasAssociatedDisplay = true;
2981        mParameters.associatedDisplayIsExternal =
2982                mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
2983                        && getDevice()->isExternal();
2984    }
2985
2986    // Initial downs on external touch devices should wake the device.
2987    // Normally we don't do this for internal touch screens to prevent them from waking
2988    // up in your pocket but you can enable it using the input device configuration.
2989    mParameters.wake = getDevice()->isExternal();
2990    getDevice()->getConfiguration().tryGetProperty(String8("touch.wake"),
2991            mParameters.wake);
2992}
2993
2994void TouchInputMapper::dumpParameters(String8& dump) {
2995    dump.append(INDENT3 "Parameters:\n");
2996
2997    switch (mParameters.gestureMode) {
2998    case Parameters::GESTURE_MODE_POINTER:
2999        dump.append(INDENT4 "GestureMode: pointer\n");
3000        break;
3001    case Parameters::GESTURE_MODE_SPOTS:
3002        dump.append(INDENT4 "GestureMode: spots\n");
3003        break;
3004    default:
3005        assert(false);
3006    }
3007
3008    switch (mParameters.deviceType) {
3009    case Parameters::DEVICE_TYPE_TOUCH_SCREEN:
3010        dump.append(INDENT4 "DeviceType: touchScreen\n");
3011        break;
3012    case Parameters::DEVICE_TYPE_TOUCH_PAD:
3013        dump.append(INDENT4 "DeviceType: touchPad\n");
3014        break;
3015    case Parameters::DEVICE_TYPE_TOUCH_NAVIGATION:
3016        dump.append(INDENT4 "DeviceType: touchNavigation\n");
3017        break;
3018    case Parameters::DEVICE_TYPE_POINTER:
3019        dump.append(INDENT4 "DeviceType: pointer\n");
3020        break;
3021    default:
3022        ALOG_ASSERT(false);
3023    }
3024
3025    dump.appendFormat(INDENT4 "AssociatedDisplay: hasAssociatedDisplay=%s, isExternal=%s\n",
3026            toString(mParameters.hasAssociatedDisplay),
3027            toString(mParameters.associatedDisplayIsExternal));
3028    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
3029            toString(mParameters.orientationAware));
3030}
3031
3032void TouchInputMapper::configureRawPointerAxes() {
3033    mRawPointerAxes.clear();
3034}
3035
3036void TouchInputMapper::dumpRawPointerAxes(String8& dump) {
3037    dump.append(INDENT3 "Raw Touch Axes:\n");
3038    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.x, "X");
3039    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.y, "Y");
3040    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.pressure, "Pressure");
3041    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.touchMajor, "TouchMajor");
3042    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.touchMinor, "TouchMinor");
3043    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.toolMajor, "ToolMajor");
3044    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.toolMinor, "ToolMinor");
3045    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.orientation, "Orientation");
3046    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.distance, "Distance");
3047    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.tiltX, "TiltX");
3048    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.tiltY, "TiltY");
3049    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.trackingId, "TrackingId");
3050    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.slot, "Slot");
3051}
3052
3053bool TouchInputMapper::hasExternalStylus() const {
3054    return mExternalStylusConnected;
3055}
3056
3057void TouchInputMapper::configureSurface(nsecs_t when, bool* outResetNeeded) {
3058    int32_t oldDeviceMode = mDeviceMode;
3059
3060    resolveExternalStylusPresence();
3061
3062    // Determine device mode.
3063    if (mParameters.deviceType == Parameters::DEVICE_TYPE_POINTER
3064            && mConfig.pointerGesturesEnabled) {
3065        mSource = AINPUT_SOURCE_MOUSE;
3066        mDeviceMode = DEVICE_MODE_POINTER;
3067        if (hasStylus()) {
3068            mSource |= AINPUT_SOURCE_STYLUS;
3069        }
3070    } else if (mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
3071            && mParameters.hasAssociatedDisplay) {
3072        mSource = AINPUT_SOURCE_TOUCHSCREEN;
3073        mDeviceMode = DEVICE_MODE_DIRECT;
3074        if (hasStylus() || hasExternalStylus()) {
3075            mSource |= AINPUT_SOURCE_STYLUS;
3076        }
3077    } else if (mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_NAVIGATION) {
3078        mSource = AINPUT_SOURCE_TOUCH_NAVIGATION;
3079        mDeviceMode = DEVICE_MODE_NAVIGATION;
3080    } else {
3081        mSource = AINPUT_SOURCE_TOUCHPAD;
3082        mDeviceMode = DEVICE_MODE_UNSCALED;
3083    }
3084
3085    // Ensure we have valid X and Y axes.
3086    if (!mRawPointerAxes.x.valid || !mRawPointerAxes.y.valid) {
3087        ALOGW(INDENT "Touch device '%s' did not report support for X or Y axis!  "
3088                "The device will be inoperable.", getDeviceName().string());
3089        mDeviceMode = DEVICE_MODE_DISABLED;
3090        return;
3091    }
3092
3093    // Raw width and height in the natural orientation.
3094    int32_t rawWidth = mRawPointerAxes.x.maxValue - mRawPointerAxes.x.minValue + 1;
3095    int32_t rawHeight = mRawPointerAxes.y.maxValue - mRawPointerAxes.y.minValue + 1;
3096
3097    // Get associated display dimensions.
3098    DisplayViewport newViewport;
3099    if (mParameters.hasAssociatedDisplay) {
3100        if (!mConfig.getDisplayInfo(mParameters.associatedDisplayIsExternal, &newViewport)) {
3101            ALOGI(INDENT "Touch device '%s' could not query the properties of its associated "
3102                    "display.  The device will be inoperable until the display size "
3103                    "becomes available.",
3104                    getDeviceName().string());
3105            mDeviceMode = DEVICE_MODE_DISABLED;
3106            return;
3107        }
3108    } else {
3109        newViewport.setNonDisplayViewport(rawWidth, rawHeight);
3110    }
3111    bool viewportChanged = mViewport != newViewport;
3112    if (viewportChanged) {
3113        mViewport = newViewport;
3114
3115        if (mDeviceMode == DEVICE_MODE_DIRECT || mDeviceMode == DEVICE_MODE_POINTER) {
3116            // Convert rotated viewport to natural surface coordinates.
3117            int32_t naturalLogicalWidth, naturalLogicalHeight;
3118            int32_t naturalPhysicalWidth, naturalPhysicalHeight;
3119            int32_t naturalPhysicalLeft, naturalPhysicalTop;
3120            int32_t naturalDeviceWidth, naturalDeviceHeight;
3121            switch (mViewport.orientation) {
3122            case DISPLAY_ORIENTATION_90:
3123                naturalLogicalWidth = mViewport.logicalBottom - mViewport.logicalTop;
3124                naturalLogicalHeight = mViewport.logicalRight - mViewport.logicalLeft;
3125                naturalPhysicalWidth = mViewport.physicalBottom - mViewport.physicalTop;
3126                naturalPhysicalHeight = mViewport.physicalRight - mViewport.physicalLeft;
3127                naturalPhysicalLeft = mViewport.deviceHeight - mViewport.physicalBottom;
3128                naturalPhysicalTop = mViewport.physicalLeft;
3129                naturalDeviceWidth = mViewport.deviceHeight;
3130                naturalDeviceHeight = mViewport.deviceWidth;
3131                break;
3132            case DISPLAY_ORIENTATION_180:
3133                naturalLogicalWidth = mViewport.logicalRight - mViewport.logicalLeft;
3134                naturalLogicalHeight = mViewport.logicalBottom - mViewport.logicalTop;
3135                naturalPhysicalWidth = mViewport.physicalRight - mViewport.physicalLeft;
3136                naturalPhysicalHeight = mViewport.physicalBottom - mViewport.physicalTop;
3137                naturalPhysicalLeft = mViewport.deviceWidth - mViewport.physicalRight;
3138                naturalPhysicalTop = mViewport.deviceHeight - mViewport.physicalBottom;
3139                naturalDeviceWidth = mViewport.deviceWidth;
3140                naturalDeviceHeight = mViewport.deviceHeight;
3141                break;
3142            case DISPLAY_ORIENTATION_270:
3143                naturalLogicalWidth = mViewport.logicalBottom - mViewport.logicalTop;
3144                naturalLogicalHeight = mViewport.logicalRight - mViewport.logicalLeft;
3145                naturalPhysicalWidth = mViewport.physicalBottom - mViewport.physicalTop;
3146                naturalPhysicalHeight = mViewport.physicalRight - mViewport.physicalLeft;
3147                naturalPhysicalLeft = mViewport.physicalTop;
3148                naturalPhysicalTop = mViewport.deviceWidth - mViewport.physicalRight;
3149                naturalDeviceWidth = mViewport.deviceHeight;
3150                naturalDeviceHeight = mViewport.deviceWidth;
3151                break;
3152            case DISPLAY_ORIENTATION_0:
3153            default:
3154                naturalLogicalWidth = mViewport.logicalRight - mViewport.logicalLeft;
3155                naturalLogicalHeight = mViewport.logicalBottom - mViewport.logicalTop;
3156                naturalPhysicalWidth = mViewport.physicalRight - mViewport.physicalLeft;
3157                naturalPhysicalHeight = mViewport.physicalBottom - mViewport.physicalTop;
3158                naturalPhysicalLeft = mViewport.physicalLeft;
3159                naturalPhysicalTop = mViewport.physicalTop;
3160                naturalDeviceWidth = mViewport.deviceWidth;
3161                naturalDeviceHeight = mViewport.deviceHeight;
3162                break;
3163            }
3164
3165            mSurfaceWidth = naturalLogicalWidth * naturalDeviceWidth / naturalPhysicalWidth;
3166            mSurfaceHeight = naturalLogicalHeight * naturalDeviceHeight / naturalPhysicalHeight;
3167            mSurfaceLeft = naturalPhysicalLeft * naturalLogicalWidth / naturalPhysicalWidth;
3168            mSurfaceTop = naturalPhysicalTop * naturalLogicalHeight / naturalPhysicalHeight;
3169
3170            mSurfaceOrientation = mParameters.orientationAware ?
3171                    mViewport.orientation : DISPLAY_ORIENTATION_0;
3172        } else {
3173            mSurfaceWidth = rawWidth;
3174            mSurfaceHeight = rawHeight;
3175            mSurfaceLeft = 0;
3176            mSurfaceTop = 0;
3177            mSurfaceOrientation = DISPLAY_ORIENTATION_0;
3178        }
3179    }
3180
3181    // If moving between pointer modes, need to reset some state.
3182    bool deviceModeChanged = mDeviceMode != oldDeviceMode;
3183    if (deviceModeChanged) {
3184        mOrientedRanges.clear();
3185    }
3186
3187    // Create pointer controller if needed.
3188    if (mDeviceMode == DEVICE_MODE_POINTER ||
3189            (mDeviceMode == DEVICE_MODE_DIRECT && mConfig.showTouches)) {
3190        if (mPointerController == NULL) {
3191            mPointerController = getPolicy()->obtainPointerController(getDeviceId());
3192        }
3193    } else {
3194        mPointerController.clear();
3195    }
3196
3197    if (viewportChanged || deviceModeChanged) {
3198        ALOGI("Device reconfigured: id=%d, name='%s', size %dx%d, orientation %d, mode %d, "
3199                "display id %d",
3200                getDeviceId(), getDeviceName().string(), mSurfaceWidth, mSurfaceHeight,
3201                mSurfaceOrientation, mDeviceMode, mViewport.displayId);
3202
3203        // Configure X and Y factors.
3204        mXScale = float(mSurfaceWidth) / rawWidth;
3205        mYScale = float(mSurfaceHeight) / rawHeight;
3206        mXTranslate = -mSurfaceLeft;
3207        mYTranslate = -mSurfaceTop;
3208        mXPrecision = 1.0f / mXScale;
3209        mYPrecision = 1.0f / mYScale;
3210
3211        mOrientedRanges.x.axis = AMOTION_EVENT_AXIS_X;
3212        mOrientedRanges.x.source = mSource;
3213        mOrientedRanges.y.axis = AMOTION_EVENT_AXIS_Y;
3214        mOrientedRanges.y.source = mSource;
3215
3216        configureVirtualKeys();
3217
3218        // Scale factor for terms that are not oriented in a particular axis.
3219        // If the pixels are square then xScale == yScale otherwise we fake it
3220        // by choosing an average.
3221        mGeometricScale = avg(mXScale, mYScale);
3222
3223        // Size of diagonal axis.
3224        float diagonalSize = hypotf(mSurfaceWidth, mSurfaceHeight);
3225
3226        // Size factors.
3227        if (mCalibration.sizeCalibration != Calibration::SIZE_CALIBRATION_NONE) {
3228            if (mRawPointerAxes.touchMajor.valid
3229                    && mRawPointerAxes.touchMajor.maxValue != 0) {
3230                mSizeScale = 1.0f / mRawPointerAxes.touchMajor.maxValue;
3231            } else if (mRawPointerAxes.toolMajor.valid
3232                    && mRawPointerAxes.toolMajor.maxValue != 0) {
3233                mSizeScale = 1.0f / mRawPointerAxes.toolMajor.maxValue;
3234            } else {
3235                mSizeScale = 0.0f;
3236            }
3237
3238            mOrientedRanges.haveTouchSize = true;
3239            mOrientedRanges.haveToolSize = true;
3240            mOrientedRanges.haveSize = true;
3241
3242            mOrientedRanges.touchMajor.axis = AMOTION_EVENT_AXIS_TOUCH_MAJOR;
3243            mOrientedRanges.touchMajor.source = mSource;
3244            mOrientedRanges.touchMajor.min = 0;
3245            mOrientedRanges.touchMajor.max = diagonalSize;
3246            mOrientedRanges.touchMajor.flat = 0;
3247            mOrientedRanges.touchMajor.fuzz = 0;
3248            mOrientedRanges.touchMajor.resolution = 0;
3249
3250            mOrientedRanges.touchMinor = mOrientedRanges.touchMajor;
3251            mOrientedRanges.touchMinor.axis = AMOTION_EVENT_AXIS_TOUCH_MINOR;
3252
3253            mOrientedRanges.toolMajor.axis = AMOTION_EVENT_AXIS_TOOL_MAJOR;
3254            mOrientedRanges.toolMajor.source = mSource;
3255            mOrientedRanges.toolMajor.min = 0;
3256            mOrientedRanges.toolMajor.max = diagonalSize;
3257            mOrientedRanges.toolMajor.flat = 0;
3258            mOrientedRanges.toolMajor.fuzz = 0;
3259            mOrientedRanges.toolMajor.resolution = 0;
3260
3261            mOrientedRanges.toolMinor = mOrientedRanges.toolMajor;
3262            mOrientedRanges.toolMinor.axis = AMOTION_EVENT_AXIS_TOOL_MINOR;
3263
3264            mOrientedRanges.size.axis = AMOTION_EVENT_AXIS_SIZE;
3265            mOrientedRanges.size.source = mSource;
3266            mOrientedRanges.size.min = 0;
3267            mOrientedRanges.size.max = 1.0;
3268            mOrientedRanges.size.flat = 0;
3269            mOrientedRanges.size.fuzz = 0;
3270            mOrientedRanges.size.resolution = 0;
3271        } else {
3272            mSizeScale = 0.0f;
3273        }
3274
3275        // Pressure factors.
3276        mPressureScale = 0;
3277        if (mCalibration.pressureCalibration == Calibration::PRESSURE_CALIBRATION_PHYSICAL
3278                || mCalibration.pressureCalibration
3279                        == Calibration::PRESSURE_CALIBRATION_AMPLITUDE) {
3280            if (mCalibration.havePressureScale) {
3281                mPressureScale = mCalibration.pressureScale;
3282            } else if (mRawPointerAxes.pressure.valid
3283                    && mRawPointerAxes.pressure.maxValue != 0) {
3284                mPressureScale = 1.0f / mRawPointerAxes.pressure.maxValue;
3285            }
3286        }
3287
3288        mOrientedRanges.pressure.axis = AMOTION_EVENT_AXIS_PRESSURE;
3289        mOrientedRanges.pressure.source = mSource;
3290        mOrientedRanges.pressure.min = 0;
3291        mOrientedRanges.pressure.max = 1.0;
3292        mOrientedRanges.pressure.flat = 0;
3293        mOrientedRanges.pressure.fuzz = 0;
3294        mOrientedRanges.pressure.resolution = 0;
3295
3296        // Tilt
3297        mTiltXCenter = 0;
3298        mTiltXScale = 0;
3299        mTiltYCenter = 0;
3300        mTiltYScale = 0;
3301        mHaveTilt = mRawPointerAxes.tiltX.valid && mRawPointerAxes.tiltY.valid;
3302        if (mHaveTilt) {
3303            mTiltXCenter = avg(mRawPointerAxes.tiltX.minValue,
3304                    mRawPointerAxes.tiltX.maxValue);
3305            mTiltYCenter = avg(mRawPointerAxes.tiltY.minValue,
3306                    mRawPointerAxes.tiltY.maxValue);
3307            mTiltXScale = M_PI / 180;
3308            mTiltYScale = M_PI / 180;
3309
3310            mOrientedRanges.haveTilt = true;
3311
3312            mOrientedRanges.tilt.axis = AMOTION_EVENT_AXIS_TILT;
3313            mOrientedRanges.tilt.source = mSource;
3314            mOrientedRanges.tilt.min = 0;
3315            mOrientedRanges.tilt.max = M_PI_2;
3316            mOrientedRanges.tilt.flat = 0;
3317            mOrientedRanges.tilt.fuzz = 0;
3318            mOrientedRanges.tilt.resolution = 0;
3319        }
3320
3321        // Orientation
3322        mOrientationScale = 0;
3323        if (mHaveTilt) {
3324            mOrientedRanges.haveOrientation = true;
3325
3326            mOrientedRanges.orientation.axis = AMOTION_EVENT_AXIS_ORIENTATION;
3327            mOrientedRanges.orientation.source = mSource;
3328            mOrientedRanges.orientation.min = -M_PI;
3329            mOrientedRanges.orientation.max = M_PI;
3330            mOrientedRanges.orientation.flat = 0;
3331            mOrientedRanges.orientation.fuzz = 0;
3332            mOrientedRanges.orientation.resolution = 0;
3333        } else if (mCalibration.orientationCalibration !=
3334                Calibration::ORIENTATION_CALIBRATION_NONE) {
3335            if (mCalibration.orientationCalibration
3336                    == Calibration::ORIENTATION_CALIBRATION_INTERPOLATED) {
3337                if (mRawPointerAxes.orientation.valid) {
3338                    if (mRawPointerAxes.orientation.maxValue > 0) {
3339                        mOrientationScale = M_PI_2 / mRawPointerAxes.orientation.maxValue;
3340                    } else if (mRawPointerAxes.orientation.minValue < 0) {
3341                        mOrientationScale = -M_PI_2 / mRawPointerAxes.orientation.minValue;
3342                    } else {
3343                        mOrientationScale = 0;
3344                    }
3345                }
3346            }
3347
3348            mOrientedRanges.haveOrientation = true;
3349
3350            mOrientedRanges.orientation.axis = AMOTION_EVENT_AXIS_ORIENTATION;
3351            mOrientedRanges.orientation.source = mSource;
3352            mOrientedRanges.orientation.min = -M_PI_2;
3353            mOrientedRanges.orientation.max = M_PI_2;
3354            mOrientedRanges.orientation.flat = 0;
3355            mOrientedRanges.orientation.fuzz = 0;
3356            mOrientedRanges.orientation.resolution = 0;
3357        }
3358
3359        // Distance
3360        mDistanceScale = 0;
3361        if (mCalibration.distanceCalibration != Calibration::DISTANCE_CALIBRATION_NONE) {
3362            if (mCalibration.distanceCalibration
3363                    == Calibration::DISTANCE_CALIBRATION_SCALED) {
3364                if (mCalibration.haveDistanceScale) {
3365                    mDistanceScale = mCalibration.distanceScale;
3366                } else {
3367                    mDistanceScale = 1.0f;
3368                }
3369            }
3370
3371            mOrientedRanges.haveDistance = true;
3372
3373            mOrientedRanges.distance.axis = AMOTION_EVENT_AXIS_DISTANCE;
3374            mOrientedRanges.distance.source = mSource;
3375            mOrientedRanges.distance.min =
3376                    mRawPointerAxes.distance.minValue * mDistanceScale;
3377            mOrientedRanges.distance.max =
3378                    mRawPointerAxes.distance.maxValue * mDistanceScale;
3379            mOrientedRanges.distance.flat = 0;
3380            mOrientedRanges.distance.fuzz =
3381                    mRawPointerAxes.distance.fuzz * mDistanceScale;
3382            mOrientedRanges.distance.resolution = 0;
3383        }
3384
3385        // Compute oriented precision, scales and ranges.
3386        // Note that the maximum value reported is an inclusive maximum value so it is one
3387        // unit less than the total width or height of surface.
3388        switch (mSurfaceOrientation) {
3389        case DISPLAY_ORIENTATION_90:
3390        case DISPLAY_ORIENTATION_270:
3391            mOrientedXPrecision = mYPrecision;
3392            mOrientedYPrecision = mXPrecision;
3393
3394            mOrientedRanges.x.min = mYTranslate;
3395            mOrientedRanges.x.max = mSurfaceHeight + mYTranslate - 1;
3396            mOrientedRanges.x.flat = 0;
3397            mOrientedRanges.x.fuzz = 0;
3398            mOrientedRanges.x.resolution = mRawPointerAxes.y.resolution * mYScale;
3399
3400            mOrientedRanges.y.min = mXTranslate;
3401            mOrientedRanges.y.max = mSurfaceWidth + mXTranslate - 1;
3402            mOrientedRanges.y.flat = 0;
3403            mOrientedRanges.y.fuzz = 0;
3404            mOrientedRanges.y.resolution = mRawPointerAxes.x.resolution * mXScale;
3405            break;
3406
3407        default:
3408            mOrientedXPrecision = mXPrecision;
3409            mOrientedYPrecision = mYPrecision;
3410
3411            mOrientedRanges.x.min = mXTranslate;
3412            mOrientedRanges.x.max = mSurfaceWidth + mXTranslate - 1;
3413            mOrientedRanges.x.flat = 0;
3414            mOrientedRanges.x.fuzz = 0;
3415            mOrientedRanges.x.resolution = mRawPointerAxes.x.resolution * mXScale;
3416
3417            mOrientedRanges.y.min = mYTranslate;
3418            mOrientedRanges.y.max = mSurfaceHeight + mYTranslate - 1;
3419            mOrientedRanges.y.flat = 0;
3420            mOrientedRanges.y.fuzz = 0;
3421            mOrientedRanges.y.resolution = mRawPointerAxes.y.resolution * mYScale;
3422            break;
3423        }
3424
3425        // Location
3426        updateAffineTransformation();
3427
3428        if (mDeviceMode == DEVICE_MODE_POINTER) {
3429            // Compute pointer gesture detection parameters.
3430            float rawDiagonal = hypotf(rawWidth, rawHeight);
3431            float displayDiagonal = hypotf(mSurfaceWidth, mSurfaceHeight);
3432
3433            // Scale movements such that one whole swipe of the touch pad covers a
3434            // given area relative to the diagonal size of the display when no acceleration
3435            // is applied.
3436            // Assume that the touch pad has a square aspect ratio such that movements in
3437            // X and Y of the same number of raw units cover the same physical distance.
3438            mPointerXMovementScale = mConfig.pointerGestureMovementSpeedRatio
3439                    * displayDiagonal / rawDiagonal;
3440            mPointerYMovementScale = mPointerXMovementScale;
3441
3442            // Scale zooms to cover a smaller range of the display than movements do.
3443            // This value determines the area around the pointer that is affected by freeform
3444            // pointer gestures.
3445            mPointerXZoomScale = mConfig.pointerGestureZoomSpeedRatio
3446                    * displayDiagonal / rawDiagonal;
3447            mPointerYZoomScale = mPointerXZoomScale;
3448
3449            // Max width between pointers to detect a swipe gesture is more than some fraction
3450            // of the diagonal axis of the touch pad.  Touches that are wider than this are
3451            // translated into freeform gestures.
3452            mPointerGestureMaxSwipeWidth =
3453                    mConfig.pointerGestureSwipeMaxWidthRatio * rawDiagonal;
3454
3455            // Abort current pointer usages because the state has changed.
3456            abortPointerUsage(when, 0 /*policyFlags*/);
3457        }
3458
3459        // Inform the dispatcher about the changes.
3460        *outResetNeeded = true;
3461        bumpGeneration();
3462    }
3463}
3464
3465void TouchInputMapper::dumpSurface(String8& dump) {
3466    dump.appendFormat(INDENT3 "Viewport: displayId=%d, orientation=%d, "
3467            "logicalFrame=[%d, %d, %d, %d], "
3468            "physicalFrame=[%d, %d, %d, %d], "
3469            "deviceSize=[%d, %d]\n",
3470            mViewport.displayId, mViewport.orientation,
3471            mViewport.logicalLeft, mViewport.logicalTop,
3472            mViewport.logicalRight, mViewport.logicalBottom,
3473            mViewport.physicalLeft, mViewport.physicalTop,
3474            mViewport.physicalRight, mViewport.physicalBottom,
3475            mViewport.deviceWidth, mViewport.deviceHeight);
3476
3477    dump.appendFormat(INDENT3 "SurfaceWidth: %dpx\n", mSurfaceWidth);
3478    dump.appendFormat(INDENT3 "SurfaceHeight: %dpx\n", mSurfaceHeight);
3479    dump.appendFormat(INDENT3 "SurfaceLeft: %d\n", mSurfaceLeft);
3480    dump.appendFormat(INDENT3 "SurfaceTop: %d\n", mSurfaceTop);
3481    dump.appendFormat(INDENT3 "SurfaceOrientation: %d\n", mSurfaceOrientation);
3482}
3483
3484void TouchInputMapper::configureVirtualKeys() {
3485    Vector<VirtualKeyDefinition> virtualKeyDefinitions;
3486    getEventHub()->getVirtualKeyDefinitions(getDeviceId(), virtualKeyDefinitions);
3487
3488    mVirtualKeys.clear();
3489
3490    if (virtualKeyDefinitions.size() == 0) {
3491        return;
3492    }
3493
3494    mVirtualKeys.setCapacity(virtualKeyDefinitions.size());
3495
3496    int32_t touchScreenLeft = mRawPointerAxes.x.minValue;
3497    int32_t touchScreenTop = mRawPointerAxes.y.minValue;
3498    int32_t touchScreenWidth = mRawPointerAxes.x.maxValue - mRawPointerAxes.x.minValue + 1;
3499    int32_t touchScreenHeight = mRawPointerAxes.y.maxValue - mRawPointerAxes.y.minValue + 1;
3500
3501    for (size_t i = 0; i < virtualKeyDefinitions.size(); i++) {
3502        const VirtualKeyDefinition& virtualKeyDefinition =
3503                virtualKeyDefinitions[i];
3504
3505        mVirtualKeys.add();
3506        VirtualKey& virtualKey = mVirtualKeys.editTop();
3507
3508        virtualKey.scanCode = virtualKeyDefinition.scanCode;
3509        int32_t keyCode;
3510        uint32_t flags;
3511        if (getEventHub()->mapKey(getDeviceId(), virtualKey.scanCode, 0, &keyCode, &flags)) {
3512            ALOGW(INDENT "VirtualKey %d: could not obtain key code, ignoring",
3513                    virtualKey.scanCode);
3514            mVirtualKeys.pop(); // drop the key
3515            continue;
3516        }
3517
3518        virtualKey.keyCode = keyCode;
3519        virtualKey.flags = flags;
3520
3521        // convert the key definition's display coordinates into touch coordinates for a hit box
3522        int32_t halfWidth = virtualKeyDefinition.width / 2;
3523        int32_t halfHeight = virtualKeyDefinition.height / 2;
3524
3525        virtualKey.hitLeft = (virtualKeyDefinition.centerX - halfWidth)
3526                * touchScreenWidth / mSurfaceWidth + touchScreenLeft;
3527        virtualKey.hitRight= (virtualKeyDefinition.centerX + halfWidth)
3528                * touchScreenWidth / mSurfaceWidth + touchScreenLeft;
3529        virtualKey.hitTop = (virtualKeyDefinition.centerY - halfHeight)
3530                * touchScreenHeight / mSurfaceHeight + touchScreenTop;
3531        virtualKey.hitBottom = (virtualKeyDefinition.centerY + halfHeight)
3532                * touchScreenHeight / mSurfaceHeight + touchScreenTop;
3533    }
3534}
3535
3536void TouchInputMapper::dumpVirtualKeys(String8& dump) {
3537    if (!mVirtualKeys.isEmpty()) {
3538        dump.append(INDENT3 "Virtual Keys:\n");
3539
3540        for (size_t i = 0; i < mVirtualKeys.size(); i++) {
3541            const VirtualKey& virtualKey = mVirtualKeys.itemAt(i);
3542            dump.appendFormat(INDENT4 "%zu: scanCode=%d, keyCode=%d, "
3543                    "hitLeft=%d, hitRight=%d, hitTop=%d, hitBottom=%d\n",
3544                    i, virtualKey.scanCode, virtualKey.keyCode,
3545                    virtualKey.hitLeft, virtualKey.hitRight,
3546                    virtualKey.hitTop, virtualKey.hitBottom);
3547        }
3548    }
3549}
3550
3551void TouchInputMapper::parseCalibration() {
3552    const PropertyMap& in = getDevice()->getConfiguration();
3553    Calibration& out = mCalibration;
3554
3555    // Size
3556    out.sizeCalibration = Calibration::SIZE_CALIBRATION_DEFAULT;
3557    String8 sizeCalibrationString;
3558    if (in.tryGetProperty(String8("touch.size.calibration"), sizeCalibrationString)) {
3559        if (sizeCalibrationString == "none") {
3560            out.sizeCalibration = Calibration::SIZE_CALIBRATION_NONE;
3561        } else if (sizeCalibrationString == "geometric") {
3562            out.sizeCalibration = Calibration::SIZE_CALIBRATION_GEOMETRIC;
3563        } else if (sizeCalibrationString == "diameter") {
3564            out.sizeCalibration = Calibration::SIZE_CALIBRATION_DIAMETER;
3565        } else if (sizeCalibrationString == "box") {
3566            out.sizeCalibration = Calibration::SIZE_CALIBRATION_BOX;
3567        } else if (sizeCalibrationString == "area") {
3568            out.sizeCalibration = Calibration::SIZE_CALIBRATION_AREA;
3569        } else if (sizeCalibrationString != "default") {
3570            ALOGW("Invalid value for touch.size.calibration: '%s'",
3571                    sizeCalibrationString.string());
3572        }
3573    }
3574
3575    out.haveSizeScale = in.tryGetProperty(String8("touch.size.scale"),
3576            out.sizeScale);
3577    out.haveSizeBias = in.tryGetProperty(String8("touch.size.bias"),
3578            out.sizeBias);
3579    out.haveSizeIsSummed = in.tryGetProperty(String8("touch.size.isSummed"),
3580            out.sizeIsSummed);
3581
3582    // Pressure
3583    out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_DEFAULT;
3584    String8 pressureCalibrationString;
3585    if (in.tryGetProperty(String8("touch.pressure.calibration"), pressureCalibrationString)) {
3586        if (pressureCalibrationString == "none") {
3587            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_NONE;
3588        } else if (pressureCalibrationString == "physical") {
3589            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_PHYSICAL;
3590        } else if (pressureCalibrationString == "amplitude") {
3591            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_AMPLITUDE;
3592        } else if (pressureCalibrationString != "default") {
3593            ALOGW("Invalid value for touch.pressure.calibration: '%s'",
3594                    pressureCalibrationString.string());
3595        }
3596    }
3597
3598    out.havePressureScale = in.tryGetProperty(String8("touch.pressure.scale"),
3599            out.pressureScale);
3600
3601    // Orientation
3602    out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_DEFAULT;
3603    String8 orientationCalibrationString;
3604    if (in.tryGetProperty(String8("touch.orientation.calibration"), orientationCalibrationString)) {
3605        if (orientationCalibrationString == "none") {
3606            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
3607        } else if (orientationCalibrationString == "interpolated") {
3608            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
3609        } else if (orientationCalibrationString == "vector") {
3610            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_VECTOR;
3611        } else if (orientationCalibrationString != "default") {
3612            ALOGW("Invalid value for touch.orientation.calibration: '%s'",
3613                    orientationCalibrationString.string());
3614        }
3615    }
3616
3617    // Distance
3618    out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_DEFAULT;
3619    String8 distanceCalibrationString;
3620    if (in.tryGetProperty(String8("touch.distance.calibration"), distanceCalibrationString)) {
3621        if (distanceCalibrationString == "none") {
3622            out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_NONE;
3623        } else if (distanceCalibrationString == "scaled") {
3624            out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_SCALED;
3625        } else if (distanceCalibrationString != "default") {
3626            ALOGW("Invalid value for touch.distance.calibration: '%s'",
3627                    distanceCalibrationString.string());
3628        }
3629    }
3630
3631    out.haveDistanceScale = in.tryGetProperty(String8("touch.distance.scale"),
3632            out.distanceScale);
3633
3634    out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_DEFAULT;
3635    String8 coverageCalibrationString;
3636    if (in.tryGetProperty(String8("touch.coverage.calibration"), coverageCalibrationString)) {
3637        if (coverageCalibrationString == "none") {
3638            out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_NONE;
3639        } else if (coverageCalibrationString == "box") {
3640            out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_BOX;
3641        } else if (coverageCalibrationString != "default") {
3642            ALOGW("Invalid value for touch.coverage.calibration: '%s'",
3643                    coverageCalibrationString.string());
3644        }
3645    }
3646}
3647
3648void TouchInputMapper::resolveCalibration() {
3649    // Size
3650    if (mRawPointerAxes.touchMajor.valid || mRawPointerAxes.toolMajor.valid) {
3651        if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_DEFAULT) {
3652            mCalibration.sizeCalibration = Calibration::SIZE_CALIBRATION_GEOMETRIC;
3653        }
3654    } else {
3655        mCalibration.sizeCalibration = Calibration::SIZE_CALIBRATION_NONE;
3656    }
3657
3658    // Pressure
3659    if (mRawPointerAxes.pressure.valid) {
3660        if (mCalibration.pressureCalibration == Calibration::PRESSURE_CALIBRATION_DEFAULT) {
3661            mCalibration.pressureCalibration = Calibration::PRESSURE_CALIBRATION_PHYSICAL;
3662        }
3663    } else {
3664        mCalibration.pressureCalibration = Calibration::PRESSURE_CALIBRATION_NONE;
3665    }
3666
3667    // Orientation
3668    if (mRawPointerAxes.orientation.valid) {
3669        if (mCalibration.orientationCalibration == Calibration::ORIENTATION_CALIBRATION_DEFAULT) {
3670            mCalibration.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
3671        }
3672    } else {
3673        mCalibration.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
3674    }
3675
3676    // Distance
3677    if (mRawPointerAxes.distance.valid) {
3678        if (mCalibration.distanceCalibration == Calibration::DISTANCE_CALIBRATION_DEFAULT) {
3679            mCalibration.distanceCalibration = Calibration::DISTANCE_CALIBRATION_SCALED;
3680        }
3681    } else {
3682        mCalibration.distanceCalibration = Calibration::DISTANCE_CALIBRATION_NONE;
3683    }
3684
3685    // Coverage
3686    if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_DEFAULT) {
3687        mCalibration.coverageCalibration = Calibration::COVERAGE_CALIBRATION_NONE;
3688    }
3689}
3690
3691void TouchInputMapper::dumpCalibration(String8& dump) {
3692    dump.append(INDENT3 "Calibration:\n");
3693
3694    // Size
3695    switch (mCalibration.sizeCalibration) {
3696    case Calibration::SIZE_CALIBRATION_NONE:
3697        dump.append(INDENT4 "touch.size.calibration: none\n");
3698        break;
3699    case Calibration::SIZE_CALIBRATION_GEOMETRIC:
3700        dump.append(INDENT4 "touch.size.calibration: geometric\n");
3701        break;
3702    case Calibration::SIZE_CALIBRATION_DIAMETER:
3703        dump.append(INDENT4 "touch.size.calibration: diameter\n");
3704        break;
3705    case Calibration::SIZE_CALIBRATION_BOX:
3706        dump.append(INDENT4 "touch.size.calibration: box\n");
3707        break;
3708    case Calibration::SIZE_CALIBRATION_AREA:
3709        dump.append(INDENT4 "touch.size.calibration: area\n");
3710        break;
3711    default:
3712        ALOG_ASSERT(false);
3713    }
3714
3715    if (mCalibration.haveSizeScale) {
3716        dump.appendFormat(INDENT4 "touch.size.scale: %0.3f\n",
3717                mCalibration.sizeScale);
3718    }
3719
3720    if (mCalibration.haveSizeBias) {
3721        dump.appendFormat(INDENT4 "touch.size.bias: %0.3f\n",
3722                mCalibration.sizeBias);
3723    }
3724
3725    if (mCalibration.haveSizeIsSummed) {
3726        dump.appendFormat(INDENT4 "touch.size.isSummed: %s\n",
3727                toString(mCalibration.sizeIsSummed));
3728    }
3729
3730    // Pressure
3731    switch (mCalibration.pressureCalibration) {
3732    case Calibration::PRESSURE_CALIBRATION_NONE:
3733        dump.append(INDENT4 "touch.pressure.calibration: none\n");
3734        break;
3735    case Calibration::PRESSURE_CALIBRATION_PHYSICAL:
3736        dump.append(INDENT4 "touch.pressure.calibration: physical\n");
3737        break;
3738    case Calibration::PRESSURE_CALIBRATION_AMPLITUDE:
3739        dump.append(INDENT4 "touch.pressure.calibration: amplitude\n");
3740        break;
3741    default:
3742        ALOG_ASSERT(false);
3743    }
3744
3745    if (mCalibration.havePressureScale) {
3746        dump.appendFormat(INDENT4 "touch.pressure.scale: %0.3f\n",
3747                mCalibration.pressureScale);
3748    }
3749
3750    // Orientation
3751    switch (mCalibration.orientationCalibration) {
3752    case Calibration::ORIENTATION_CALIBRATION_NONE:
3753        dump.append(INDENT4 "touch.orientation.calibration: none\n");
3754        break;
3755    case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
3756        dump.append(INDENT4 "touch.orientation.calibration: interpolated\n");
3757        break;
3758    case Calibration::ORIENTATION_CALIBRATION_VECTOR:
3759        dump.append(INDENT4 "touch.orientation.calibration: vector\n");
3760        break;
3761    default:
3762        ALOG_ASSERT(false);
3763    }
3764
3765    // Distance
3766    switch (mCalibration.distanceCalibration) {
3767    case Calibration::DISTANCE_CALIBRATION_NONE:
3768        dump.append(INDENT4 "touch.distance.calibration: none\n");
3769        break;
3770    case Calibration::DISTANCE_CALIBRATION_SCALED:
3771        dump.append(INDENT4 "touch.distance.calibration: scaled\n");
3772        break;
3773    default:
3774        ALOG_ASSERT(false);
3775    }
3776
3777    if (mCalibration.haveDistanceScale) {
3778        dump.appendFormat(INDENT4 "touch.distance.scale: %0.3f\n",
3779                mCalibration.distanceScale);
3780    }
3781
3782    switch (mCalibration.coverageCalibration) {
3783    case Calibration::COVERAGE_CALIBRATION_NONE:
3784        dump.append(INDENT4 "touch.coverage.calibration: none\n");
3785        break;
3786    case Calibration::COVERAGE_CALIBRATION_BOX:
3787        dump.append(INDENT4 "touch.coverage.calibration: box\n");
3788        break;
3789    default:
3790        ALOG_ASSERT(false);
3791    }
3792}
3793
3794void TouchInputMapper::dumpAffineTransformation(String8& dump) {
3795    dump.append(INDENT3 "Affine Transformation:\n");
3796
3797    dump.appendFormat(INDENT4 "X scale: %0.3f\n", mAffineTransform.x_scale);
3798    dump.appendFormat(INDENT4 "X ymix: %0.3f\n", mAffineTransform.x_ymix);
3799    dump.appendFormat(INDENT4 "X offset: %0.3f\n", mAffineTransform.x_offset);
3800    dump.appendFormat(INDENT4 "Y xmix: %0.3f\n", mAffineTransform.y_xmix);
3801    dump.appendFormat(INDENT4 "Y scale: %0.3f\n", mAffineTransform.y_scale);
3802    dump.appendFormat(INDENT4 "Y offset: %0.3f\n", mAffineTransform.y_offset);
3803}
3804
3805void TouchInputMapper::updateAffineTransformation() {
3806    mAffineTransform = getPolicy()->getTouchAffineTransformation(mDevice->getDescriptor(),
3807            mSurfaceOrientation);
3808}
3809
3810void TouchInputMapper::reset(nsecs_t when) {
3811    mCursorButtonAccumulator.reset(getDevice());
3812    mCursorScrollAccumulator.reset(getDevice());
3813    mTouchButtonAccumulator.reset(getDevice());
3814
3815    mPointerVelocityControl.reset();
3816    mWheelXVelocityControl.reset();
3817    mWheelYVelocityControl.reset();
3818
3819    mRawStatesPending.clear();
3820    mCurrentRawState.clear();
3821    mCurrentCookedState.clear();
3822    mLastRawState.clear();
3823    mLastCookedState.clear();
3824    mPointerUsage = POINTER_USAGE_NONE;
3825    mSentHoverEnter = false;
3826    mHavePointerIds = false;
3827    mDownTime = 0;
3828
3829    mCurrentVirtualKey.down = false;
3830
3831    mPointerGesture.reset();
3832    mPointerSimple.reset();
3833    resetExternalStylus();
3834
3835    if (mPointerController != NULL) {
3836        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
3837        mPointerController->clearSpots();
3838    }
3839
3840    InputMapper::reset(when);
3841}
3842
3843void TouchInputMapper::resetExternalStylus() {
3844    mExternalStylusState.clear();
3845    mExternalStylusId = -1;
3846    mExternalStylusFusionTimeout = LLONG_MAX;
3847    mExternalStylusDataPending = false;
3848}
3849
3850void TouchInputMapper::clearStylusDataPendingFlags() {
3851    mExternalStylusDataPending = false;
3852    mExternalStylusFusionTimeout = LLONG_MAX;
3853}
3854
3855void TouchInputMapper::process(const RawEvent* rawEvent) {
3856    mCursorButtonAccumulator.process(rawEvent);
3857    mCursorScrollAccumulator.process(rawEvent);
3858    mTouchButtonAccumulator.process(rawEvent);
3859
3860    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
3861        sync(rawEvent->when);
3862    }
3863}
3864
3865void TouchInputMapper::sync(nsecs_t when) {
3866    const RawState* last = mRawStatesPending.isEmpty() ?
3867            &mCurrentRawState : &mRawStatesPending.top();
3868
3869    // Push a new state.
3870    mRawStatesPending.push();
3871    RawState* next = &mRawStatesPending.editTop();
3872    next->clear();
3873    next->when = when;
3874
3875    // Sync button state.
3876    next->buttonState = mTouchButtonAccumulator.getButtonState()
3877            | mCursorButtonAccumulator.getButtonState();
3878
3879    // Sync scroll
3880    next->rawVScroll = mCursorScrollAccumulator.getRelativeVWheel();
3881    next->rawHScroll = mCursorScrollAccumulator.getRelativeHWheel();
3882    mCursorScrollAccumulator.finishSync();
3883
3884    // Sync touch
3885    syncTouch(when, next);
3886
3887    // Assign pointer ids.
3888    if (!mHavePointerIds) {
3889        assignPointerIds(last, next);
3890    }
3891
3892#if DEBUG_RAW_EVENTS
3893    ALOGD("syncTouch: pointerCount %d -> %d, touching ids 0x%08x -> 0x%08x, "
3894            "hovering ids 0x%08x -> 0x%08x",
3895            last->rawPointerData.pointerCount,
3896            next->rawPointerData.pointerCount,
3897            last->rawPointerData.touchingIdBits.value,
3898            next->rawPointerData.touchingIdBits.value,
3899            last->rawPointerData.hoveringIdBits.value,
3900            next->rawPointerData.hoveringIdBits.value);
3901#endif
3902
3903    processRawTouches(false /*timeout*/);
3904}
3905
3906void TouchInputMapper::processRawTouches(bool timeout) {
3907    if (mDeviceMode == DEVICE_MODE_DISABLED) {
3908        // Drop all input if the device is disabled.
3909        mCurrentRawState.clear();
3910        mRawStatesPending.clear();
3911        return;
3912    }
3913
3914    // Drain any pending touch states. The invariant here is that the mCurrentRawState is always
3915    // valid and must go through the full cook and dispatch cycle. This ensures that anything
3916    // touching the current state will only observe the events that have been dispatched to the
3917    // rest of the pipeline.
3918    const size_t N = mRawStatesPending.size();
3919    size_t count;
3920    for(count = 0; count < N; count++) {
3921        const RawState& next = mRawStatesPending[count];
3922
3923        // A failure to assign the stylus id means that we're waiting on stylus data
3924        // and so should defer the rest of the pipeline.
3925        if (assignExternalStylusId(next, timeout)) {
3926            break;
3927        }
3928
3929        // All ready to go.
3930        clearStylusDataPendingFlags();
3931        mCurrentRawState.copyFrom(next);
3932        if (mCurrentRawState.when < mLastRawState.when) {
3933            mCurrentRawState.when = mLastRawState.when;
3934        }
3935        cookAndDispatch(mCurrentRawState.when);
3936    }
3937    if (count != 0) {
3938        mRawStatesPending.removeItemsAt(0, count);
3939    }
3940
3941    if (mExternalStylusDataPending) {
3942        if (timeout) {
3943            nsecs_t when = mExternalStylusFusionTimeout - STYLUS_DATA_LATENCY;
3944            clearStylusDataPendingFlags();
3945            mCurrentRawState.copyFrom(mLastRawState);
3946#if DEBUG_STYLUS_FUSION
3947            ALOGD("Timeout expired, synthesizing event with new stylus data");
3948#endif
3949            cookAndDispatch(when);
3950        } else if (mExternalStylusFusionTimeout == LLONG_MAX) {
3951            mExternalStylusFusionTimeout = mExternalStylusState.when + TOUCH_DATA_TIMEOUT;
3952            getContext()->requestTimeoutAtTime(mExternalStylusFusionTimeout);
3953        }
3954    }
3955}
3956
3957void TouchInputMapper::cookAndDispatch(nsecs_t when) {
3958    // Always start with a clean state.
3959    mCurrentCookedState.clear();
3960
3961    // Apply stylus buttons to current raw state.
3962    applyExternalStylusButtonState(when);
3963
3964    // Handle policy on initial down or hover events.
3965    bool initialDown = mLastRawState.rawPointerData.pointerCount == 0
3966            && mCurrentRawState.rawPointerData.pointerCount != 0;
3967
3968    uint32_t policyFlags = 0;
3969    bool buttonsPressed = mCurrentRawState.buttonState & ~mLastRawState.buttonState;
3970    if (initialDown || buttonsPressed) {
3971        // If this is a touch screen, hide the pointer on an initial down.
3972        if (mDeviceMode == DEVICE_MODE_DIRECT) {
3973            getContext()->fadePointer();
3974        }
3975
3976        if (mParameters.wake) {
3977            policyFlags |= POLICY_FLAG_WAKE;
3978        }
3979    }
3980
3981    // Consume raw off-screen touches before cooking pointer data.
3982    // If touches are consumed, subsequent code will not receive any pointer data.
3983    if (consumeRawTouches(when, policyFlags)) {
3984        mCurrentRawState.rawPointerData.clear();
3985    }
3986
3987    // Cook pointer data.  This call populates the mCurrentCookedState.cookedPointerData structure
3988    // with cooked pointer data that has the same ids and indices as the raw data.
3989    // The following code can use either the raw or cooked data, as needed.
3990    cookPointerData();
3991
3992    // Apply stylus pressure to current cooked state.
3993    applyExternalStylusTouchState(when);
3994
3995    // Synthesize key down from raw buttons if needed.
3996    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
3997            policyFlags, mLastRawState.buttonState, mCurrentRawState.buttonState);
3998
3999    // Dispatch the touches either directly or by translation through a pointer on screen.
4000    if (mDeviceMode == DEVICE_MODE_POINTER) {
4001        for (BitSet32 idBits(mCurrentRawState.rawPointerData.touchingIdBits);
4002                !idBits.isEmpty(); ) {
4003            uint32_t id = idBits.clearFirstMarkedBit();
4004            const RawPointerData::Pointer& pointer =
4005                    mCurrentRawState.rawPointerData.pointerForId(id);
4006            if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_STYLUS
4007                    || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_ERASER) {
4008                mCurrentCookedState.stylusIdBits.markBit(id);
4009            } else if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_FINGER
4010                    || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
4011                mCurrentCookedState.fingerIdBits.markBit(id);
4012            } else if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_MOUSE) {
4013                mCurrentCookedState.mouseIdBits.markBit(id);
4014            }
4015        }
4016        for (BitSet32 idBits(mCurrentRawState.rawPointerData.hoveringIdBits);
4017                !idBits.isEmpty(); ) {
4018            uint32_t id = idBits.clearFirstMarkedBit();
4019            const RawPointerData::Pointer& pointer =
4020                    mCurrentRawState.rawPointerData.pointerForId(id);
4021            if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_STYLUS
4022                    || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_ERASER) {
4023                mCurrentCookedState.stylusIdBits.markBit(id);
4024            }
4025        }
4026
4027        // Stylus takes precedence over all tools, then mouse, then finger.
4028        PointerUsage pointerUsage = mPointerUsage;
4029        if (!mCurrentCookedState.stylusIdBits.isEmpty()) {
4030            mCurrentCookedState.mouseIdBits.clear();
4031            mCurrentCookedState.fingerIdBits.clear();
4032            pointerUsage = POINTER_USAGE_STYLUS;
4033        } else if (!mCurrentCookedState.mouseIdBits.isEmpty()) {
4034            mCurrentCookedState.fingerIdBits.clear();
4035            pointerUsage = POINTER_USAGE_MOUSE;
4036        } else if (!mCurrentCookedState.fingerIdBits.isEmpty() ||
4037                isPointerDown(mCurrentRawState.buttonState)) {
4038            pointerUsage = POINTER_USAGE_GESTURES;
4039        }
4040
4041        dispatchPointerUsage(when, policyFlags, pointerUsage);
4042    } else {
4043        if (mDeviceMode == DEVICE_MODE_DIRECT
4044                && mConfig.showTouches && mPointerController != NULL) {
4045            mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_SPOT);
4046            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
4047
4048            mPointerController->setButtonState(mCurrentRawState.buttonState);
4049            mPointerController->setSpots(mCurrentCookedState.cookedPointerData.pointerCoords,
4050                    mCurrentCookedState.cookedPointerData.idToIndex,
4051                    mCurrentCookedState.cookedPointerData.touchingIdBits);
4052        }
4053
4054        dispatchHoverExit(when, policyFlags);
4055        dispatchTouches(when, policyFlags);
4056        dispatchHoverEnterAndMove(when, policyFlags);
4057    }
4058
4059    // Synthesize key up from raw buttons if needed.
4060    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
4061            policyFlags, mLastRawState.buttonState, mCurrentRawState.buttonState);
4062
4063    // Clear some transient state.
4064    mCurrentRawState.rawVScroll = 0;
4065    mCurrentRawState.rawHScroll = 0;
4066
4067    // Copy current touch to last touch in preparation for the next cycle.
4068    mLastRawState.copyFrom(mCurrentRawState);
4069    mLastCookedState.copyFrom(mCurrentCookedState);
4070}
4071
4072void TouchInputMapper::applyExternalStylusButtonState(nsecs_t when) {
4073    if (mDeviceMode == DEVICE_MODE_DIRECT && hasExternalStylus()) {
4074        mCurrentRawState.buttonState |= mExternalStylusState.buttons;
4075    }
4076}
4077
4078void TouchInputMapper::applyExternalStylusTouchState(nsecs_t when) {
4079    CookedPointerData& cpd = mCurrentCookedState.cookedPointerData;
4080    if (mExternalStylusId != -1 && cpd.isTouching(mExternalStylusId)) {
4081        if (mExternalStylusState.pressure != 0.0f) {
4082            PointerCoords& coords = cpd.editPointerCoordsWithId(mExternalStylusId);
4083            coords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, mExternalStylusState.pressure);
4084        }
4085
4086        PointerProperties& properties = cpd.editPointerPropertiesWithId(mExternalStylusId);
4087        if (mExternalStylusState.toolType != AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
4088            properties.toolType = mExternalStylusState.toolType;
4089        }
4090    }
4091}
4092
4093bool TouchInputMapper::assignExternalStylusId(const RawState& state, bool timeout) {
4094    if (mDeviceMode != DEVICE_MODE_DIRECT || !hasExternalStylus()) {
4095        return false;
4096    }
4097
4098    const bool initialDown = mLastRawState.rawPointerData.pointerCount == 0
4099            && state.rawPointerData.pointerCount != 0;
4100    if (initialDown) {
4101        if (mExternalStylusState.pressure != 0.0f) {
4102#if DEBUG_STYLUS_FUSION
4103            ALOGD("Have both stylus and touch data, beginning fusion");
4104#endif
4105            mExternalStylusId = state.rawPointerData.touchingIdBits.firstMarkedBit();
4106        } else if (timeout) {
4107#if DEBUG_STYLUS_FUSION
4108            ALOGD("Timeout expired, assuming touch is not a stylus.");
4109#endif
4110            resetExternalStylus();
4111        } else {
4112            if (mExternalStylusFusionTimeout == LLONG_MAX) {
4113                mExternalStylusFusionTimeout = state.when + EXTERNAL_STYLUS_DATA_TIMEOUT;
4114            }
4115#if DEBUG_STYLUS_FUSION
4116            ALOGD("No stylus data but stylus is connected, requesting timeout "
4117                    "(%" PRId64 "ms)", mExternalStylusFusionTimeout);
4118#endif
4119            getContext()->requestTimeoutAtTime(mExternalStylusFusionTimeout);
4120            return true;
4121        }
4122    }
4123
4124    // Check if the stylus pointer has gone up.
4125    if (mExternalStylusId != -1 &&
4126            !state.rawPointerData.touchingIdBits.hasBit(mExternalStylusId)) {
4127#if DEBUG_STYLUS_FUSION
4128            ALOGD("Stylus pointer is going up");
4129#endif
4130        mExternalStylusId = -1;
4131    }
4132
4133    return false;
4134}
4135
4136void TouchInputMapper::timeoutExpired(nsecs_t when) {
4137    if (mDeviceMode == DEVICE_MODE_POINTER) {
4138        if (mPointerUsage == POINTER_USAGE_GESTURES) {
4139            dispatchPointerGestures(when, 0 /*policyFlags*/, true /*isTimeout*/);
4140        }
4141    } else if (mDeviceMode == DEVICE_MODE_DIRECT) {
4142        if (mExternalStylusFusionTimeout < when) {
4143            processRawTouches(true /*timeout*/);
4144        } else if (mExternalStylusFusionTimeout != LLONG_MAX) {
4145            getContext()->requestTimeoutAtTime(mExternalStylusFusionTimeout);
4146        }
4147    }
4148}
4149
4150void TouchInputMapper::updateExternalStylusState(const StylusState& state) {
4151    mExternalStylusState.copyFrom(state);
4152    if (mExternalStylusId != -1 || mExternalStylusFusionTimeout != LLONG_MAX) {
4153        // We're either in the middle of a fused stream of data or we're waiting on data before
4154        // dispatching the initial down, so go ahead and dispatch now that we have fresh stylus
4155        // data.
4156        mExternalStylusDataPending = true;
4157        processRawTouches(false /*timeout*/);
4158    }
4159}
4160
4161bool TouchInputMapper::consumeRawTouches(nsecs_t when, uint32_t policyFlags) {
4162    // Check for release of a virtual key.
4163    if (mCurrentVirtualKey.down) {
4164        if (mCurrentRawState.rawPointerData.touchingIdBits.isEmpty()) {
4165            // Pointer went up while virtual key was down.
4166            mCurrentVirtualKey.down = false;
4167            if (!mCurrentVirtualKey.ignored) {
4168#if DEBUG_VIRTUAL_KEYS
4169                ALOGD("VirtualKeys: Generating key up: keyCode=%d, scanCode=%d",
4170                        mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
4171#endif
4172                dispatchVirtualKey(when, policyFlags,
4173                        AKEY_EVENT_ACTION_UP,
4174                        AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
4175            }
4176            return true;
4177        }
4178
4179        if (mCurrentRawState.rawPointerData.touchingIdBits.count() == 1) {
4180            uint32_t id = mCurrentRawState.rawPointerData.touchingIdBits.firstMarkedBit();
4181            const RawPointerData::Pointer& pointer =
4182                    mCurrentRawState.rawPointerData.pointerForId(id);
4183            const VirtualKey* virtualKey = findVirtualKeyHit(pointer.x, pointer.y);
4184            if (virtualKey && virtualKey->keyCode == mCurrentVirtualKey.keyCode) {
4185                // Pointer is still within the space of the virtual key.
4186                return true;
4187            }
4188        }
4189
4190        // Pointer left virtual key area or another pointer also went down.
4191        // Send key cancellation but do not consume the touch yet.
4192        // This is useful when the user swipes through from the virtual key area
4193        // into the main display surface.
4194        mCurrentVirtualKey.down = false;
4195        if (!mCurrentVirtualKey.ignored) {
4196#if DEBUG_VIRTUAL_KEYS
4197            ALOGD("VirtualKeys: Canceling key: keyCode=%d, scanCode=%d",
4198                    mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
4199#endif
4200            dispatchVirtualKey(when, policyFlags,
4201                    AKEY_EVENT_ACTION_UP,
4202                    AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY
4203                            | AKEY_EVENT_FLAG_CANCELED);
4204        }
4205    }
4206
4207    if (mLastRawState.rawPointerData.touchingIdBits.isEmpty()
4208            && !mCurrentRawState.rawPointerData.touchingIdBits.isEmpty()) {
4209        // Pointer just went down.  Check for virtual key press or off-screen touches.
4210        uint32_t id = mCurrentRawState.rawPointerData.touchingIdBits.firstMarkedBit();
4211        const RawPointerData::Pointer& pointer = mCurrentRawState.rawPointerData.pointerForId(id);
4212        if (!isPointInsideSurface(pointer.x, pointer.y)) {
4213            // If exactly one pointer went down, check for virtual key hit.
4214            // Otherwise we will drop the entire stroke.
4215            if (mCurrentRawState.rawPointerData.touchingIdBits.count() == 1) {
4216                const VirtualKey* virtualKey = findVirtualKeyHit(pointer.x, pointer.y);
4217                if (virtualKey) {
4218                    mCurrentVirtualKey.down = true;
4219                    mCurrentVirtualKey.downTime = when;
4220                    mCurrentVirtualKey.keyCode = virtualKey->keyCode;
4221                    mCurrentVirtualKey.scanCode = virtualKey->scanCode;
4222                    mCurrentVirtualKey.ignored = mContext->shouldDropVirtualKey(
4223                            when, getDevice(), virtualKey->keyCode, virtualKey->scanCode);
4224
4225                    if (!mCurrentVirtualKey.ignored) {
4226#if DEBUG_VIRTUAL_KEYS
4227                        ALOGD("VirtualKeys: Generating key down: keyCode=%d, scanCode=%d",
4228                                mCurrentVirtualKey.keyCode,
4229                                mCurrentVirtualKey.scanCode);
4230#endif
4231                        dispatchVirtualKey(when, policyFlags,
4232                                AKEY_EVENT_ACTION_DOWN,
4233                                AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
4234                    }
4235                }
4236            }
4237            return true;
4238        }
4239    }
4240
4241    // Disable all virtual key touches that happen within a short time interval of the
4242    // most recent touch within the screen area.  The idea is to filter out stray
4243    // virtual key presses when interacting with the touch screen.
4244    //
4245    // Problems we're trying to solve:
4246    //
4247    // 1. While scrolling a list or dragging the window shade, the user swipes down into a
4248    //    virtual key area that is implemented by a separate touch panel and accidentally
4249    //    triggers a virtual key.
4250    //
4251    // 2. While typing in the on screen keyboard, the user taps slightly outside the screen
4252    //    area and accidentally triggers a virtual key.  This often happens when virtual keys
4253    //    are layed out below the screen near to where the on screen keyboard's space bar
4254    //    is displayed.
4255    if (mConfig.virtualKeyQuietTime > 0 &&
4256            !mCurrentRawState.rawPointerData.touchingIdBits.isEmpty()) {
4257        mContext->disableVirtualKeysUntil(when + mConfig.virtualKeyQuietTime);
4258    }
4259    return false;
4260}
4261
4262void TouchInputMapper::dispatchVirtualKey(nsecs_t when, uint32_t policyFlags,
4263        int32_t keyEventAction, int32_t keyEventFlags) {
4264    int32_t keyCode = mCurrentVirtualKey.keyCode;
4265    int32_t scanCode = mCurrentVirtualKey.scanCode;
4266    nsecs_t downTime = mCurrentVirtualKey.downTime;
4267    int32_t metaState = mContext->getGlobalMetaState();
4268    policyFlags |= POLICY_FLAG_VIRTUAL;
4269
4270    NotifyKeyArgs args(when, getDeviceId(), AINPUT_SOURCE_KEYBOARD, policyFlags,
4271            keyEventAction, keyEventFlags, keyCode, scanCode, metaState, downTime);
4272    getListener()->notifyKey(&args);
4273}
4274
4275void TouchInputMapper::dispatchTouches(nsecs_t when, uint32_t policyFlags) {
4276    BitSet32 currentIdBits = mCurrentCookedState.cookedPointerData.touchingIdBits;
4277    BitSet32 lastIdBits = mLastCookedState.cookedPointerData.touchingIdBits;
4278    int32_t metaState = getContext()->getGlobalMetaState();
4279    int32_t buttonState = mCurrentRawState.buttonState;
4280
4281    if (currentIdBits == lastIdBits) {
4282        if (!currentIdBits.isEmpty()) {
4283            // No pointer id changes so this is a move event.
4284            // The listener takes care of batching moves so we don't have to deal with that here.
4285            dispatchMotion(when, policyFlags, mSource,
4286                    AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState,
4287                    AMOTION_EVENT_EDGE_FLAG_NONE,
4288                    mCurrentCookedState.cookedPointerData.pointerProperties,
4289                    mCurrentCookedState.cookedPointerData.pointerCoords,
4290                    mCurrentCookedState.cookedPointerData.idToIndex,
4291                    currentIdBits, -1,
4292                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4293        }
4294    } else {
4295        // There may be pointers going up and pointers going down and pointers moving
4296        // all at the same time.
4297        BitSet32 upIdBits(lastIdBits.value & ~currentIdBits.value);
4298        BitSet32 downIdBits(currentIdBits.value & ~lastIdBits.value);
4299        BitSet32 moveIdBits(lastIdBits.value & currentIdBits.value);
4300        BitSet32 dispatchedIdBits(lastIdBits.value);
4301
4302        // Update last coordinates of pointers that have moved so that we observe the new
4303        // pointer positions at the same time as other pointers that have just gone up.
4304        bool moveNeeded = updateMovedPointers(
4305                mCurrentCookedState.cookedPointerData.pointerProperties,
4306                mCurrentCookedState.cookedPointerData.pointerCoords,
4307                mCurrentCookedState.cookedPointerData.idToIndex,
4308                mLastCookedState.cookedPointerData.pointerProperties,
4309                mLastCookedState.cookedPointerData.pointerCoords,
4310                mLastCookedState.cookedPointerData.idToIndex,
4311                moveIdBits);
4312        if (buttonState != mLastRawState.buttonState) {
4313            moveNeeded = true;
4314        }
4315
4316        // Dispatch pointer up events.
4317        while (!upIdBits.isEmpty()) {
4318            uint32_t upId = upIdBits.clearFirstMarkedBit();
4319
4320            dispatchMotion(when, policyFlags, mSource,
4321                    AMOTION_EVENT_ACTION_POINTER_UP, 0, metaState, buttonState, 0,
4322                    mLastCookedState.cookedPointerData.pointerProperties,
4323                    mLastCookedState.cookedPointerData.pointerCoords,
4324                    mLastCookedState.cookedPointerData.idToIndex,
4325                    dispatchedIdBits, upId,
4326                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4327            dispatchedIdBits.clearBit(upId);
4328        }
4329
4330        // Dispatch move events if any of the remaining pointers moved from their old locations.
4331        // Although applications receive new locations as part of individual pointer up
4332        // events, they do not generally handle them except when presented in a move event.
4333        if (moveNeeded && !moveIdBits.isEmpty()) {
4334            ALOG_ASSERT(moveIdBits.value == dispatchedIdBits.value);
4335            dispatchMotion(when, policyFlags, mSource,
4336                    AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, 0,
4337                    mCurrentCookedState.cookedPointerData.pointerProperties,
4338                    mCurrentCookedState.cookedPointerData.pointerCoords,
4339                    mCurrentCookedState.cookedPointerData.idToIndex,
4340                    dispatchedIdBits, -1,
4341                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4342        }
4343
4344        // Dispatch pointer down events using the new pointer locations.
4345        while (!downIdBits.isEmpty()) {
4346            uint32_t downId = downIdBits.clearFirstMarkedBit();
4347            dispatchedIdBits.markBit(downId);
4348
4349            if (dispatchedIdBits.count() == 1) {
4350                // First pointer is going down.  Set down time.
4351                mDownTime = when;
4352            }
4353
4354            dispatchMotion(when, policyFlags, mSource,
4355                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, metaState, buttonState, 0,
4356                    mCurrentCookedState.cookedPointerData.pointerProperties,
4357                    mCurrentCookedState.cookedPointerData.pointerCoords,
4358                    mCurrentCookedState.cookedPointerData.idToIndex,
4359                    dispatchedIdBits, downId,
4360                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4361        }
4362    }
4363}
4364
4365void TouchInputMapper::dispatchHoverExit(nsecs_t when, uint32_t policyFlags) {
4366    if (mSentHoverEnter &&
4367            (mCurrentCookedState.cookedPointerData.hoveringIdBits.isEmpty()
4368                    || !mCurrentCookedState.cookedPointerData.touchingIdBits.isEmpty())) {
4369        int32_t metaState = getContext()->getGlobalMetaState();
4370        dispatchMotion(when, policyFlags, mSource,
4371                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, metaState, mLastRawState.buttonState, 0,
4372                mLastCookedState.cookedPointerData.pointerProperties,
4373                mLastCookedState.cookedPointerData.pointerCoords,
4374                mLastCookedState.cookedPointerData.idToIndex,
4375                mLastCookedState.cookedPointerData.hoveringIdBits, -1,
4376                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4377        mSentHoverEnter = false;
4378    }
4379}
4380
4381void TouchInputMapper::dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags) {
4382    if (mCurrentCookedState.cookedPointerData.touchingIdBits.isEmpty()
4383            && !mCurrentCookedState.cookedPointerData.hoveringIdBits.isEmpty()) {
4384        int32_t metaState = getContext()->getGlobalMetaState();
4385        if (!mSentHoverEnter) {
4386            dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_ENTER,
4387                    0, metaState, mCurrentRawState.buttonState, 0,
4388                    mCurrentCookedState.cookedPointerData.pointerProperties,
4389                    mCurrentCookedState.cookedPointerData.pointerCoords,
4390                    mCurrentCookedState.cookedPointerData.idToIndex,
4391                    mCurrentCookedState.cookedPointerData.hoveringIdBits, -1,
4392                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4393            mSentHoverEnter = true;
4394        }
4395
4396        dispatchMotion(when, policyFlags, mSource,
4397                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, metaState,
4398                mCurrentRawState.buttonState, 0,
4399                mCurrentCookedState.cookedPointerData.pointerProperties,
4400                mCurrentCookedState.cookedPointerData.pointerCoords,
4401                mCurrentCookedState.cookedPointerData.idToIndex,
4402                mCurrentCookedState.cookedPointerData.hoveringIdBits, -1,
4403                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4404    }
4405}
4406
4407void TouchInputMapper::cookPointerData() {
4408    uint32_t currentPointerCount = mCurrentRawState.rawPointerData.pointerCount;
4409
4410    mCurrentCookedState.cookedPointerData.clear();
4411    mCurrentCookedState.cookedPointerData.pointerCount = currentPointerCount;
4412    mCurrentCookedState.cookedPointerData.hoveringIdBits =
4413            mCurrentRawState.rawPointerData.hoveringIdBits;
4414    mCurrentCookedState.cookedPointerData.touchingIdBits =
4415            mCurrentRawState.rawPointerData.touchingIdBits;
4416
4417    // Walk through the the active pointers and map device coordinates onto
4418    // surface coordinates and adjust for display orientation.
4419    for (uint32_t i = 0; i < currentPointerCount; i++) {
4420        const RawPointerData::Pointer& in = mCurrentRawState.rawPointerData.pointers[i];
4421
4422        // Size
4423        float touchMajor, touchMinor, toolMajor, toolMinor, size;
4424        switch (mCalibration.sizeCalibration) {
4425        case Calibration::SIZE_CALIBRATION_GEOMETRIC:
4426        case Calibration::SIZE_CALIBRATION_DIAMETER:
4427        case Calibration::SIZE_CALIBRATION_BOX:
4428        case Calibration::SIZE_CALIBRATION_AREA:
4429            if (mRawPointerAxes.touchMajor.valid && mRawPointerAxes.toolMajor.valid) {
4430                touchMajor = in.touchMajor;
4431                touchMinor = mRawPointerAxes.touchMinor.valid ? in.touchMinor : in.touchMajor;
4432                toolMajor = in.toolMajor;
4433                toolMinor = mRawPointerAxes.toolMinor.valid ? in.toolMinor : in.toolMajor;
4434                size = mRawPointerAxes.touchMinor.valid
4435                        ? avg(in.touchMajor, in.touchMinor) : in.touchMajor;
4436            } else if (mRawPointerAxes.touchMajor.valid) {
4437                toolMajor = touchMajor = in.touchMajor;
4438                toolMinor = touchMinor = mRawPointerAxes.touchMinor.valid
4439                        ? in.touchMinor : in.touchMajor;
4440                size = mRawPointerAxes.touchMinor.valid
4441                        ? avg(in.touchMajor, in.touchMinor) : in.touchMajor;
4442            } else if (mRawPointerAxes.toolMajor.valid) {
4443                touchMajor = toolMajor = in.toolMajor;
4444                touchMinor = toolMinor = mRawPointerAxes.toolMinor.valid
4445                        ? in.toolMinor : in.toolMajor;
4446                size = mRawPointerAxes.toolMinor.valid
4447                        ? avg(in.toolMajor, in.toolMinor) : in.toolMajor;
4448            } else {
4449                ALOG_ASSERT(false, "No touch or tool axes.  "
4450                        "Size calibration should have been resolved to NONE.");
4451                touchMajor = 0;
4452                touchMinor = 0;
4453                toolMajor = 0;
4454                toolMinor = 0;
4455                size = 0;
4456            }
4457
4458            if (mCalibration.haveSizeIsSummed && mCalibration.sizeIsSummed) {
4459                uint32_t touchingCount =
4460                        mCurrentRawState.rawPointerData.touchingIdBits.count();
4461                if (touchingCount > 1) {
4462                    touchMajor /= touchingCount;
4463                    touchMinor /= touchingCount;
4464                    toolMajor /= touchingCount;
4465                    toolMinor /= touchingCount;
4466                    size /= touchingCount;
4467                }
4468            }
4469
4470            if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_GEOMETRIC) {
4471                touchMajor *= mGeometricScale;
4472                touchMinor *= mGeometricScale;
4473                toolMajor *= mGeometricScale;
4474                toolMinor *= mGeometricScale;
4475            } else if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_AREA) {
4476                touchMajor = touchMajor > 0 ? sqrtf(touchMajor) : 0;
4477                touchMinor = touchMajor;
4478                toolMajor = toolMajor > 0 ? sqrtf(toolMajor) : 0;
4479                toolMinor = toolMajor;
4480            } else if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_DIAMETER) {
4481                touchMinor = touchMajor;
4482                toolMinor = toolMajor;
4483            }
4484
4485            mCalibration.applySizeScaleAndBias(&touchMajor);
4486            mCalibration.applySizeScaleAndBias(&touchMinor);
4487            mCalibration.applySizeScaleAndBias(&toolMajor);
4488            mCalibration.applySizeScaleAndBias(&toolMinor);
4489            size *= mSizeScale;
4490            break;
4491        default:
4492            touchMajor = 0;
4493            touchMinor = 0;
4494            toolMajor = 0;
4495            toolMinor = 0;
4496            size = 0;
4497            break;
4498        }
4499
4500        // Pressure
4501        float pressure;
4502        switch (mCalibration.pressureCalibration) {
4503        case Calibration::PRESSURE_CALIBRATION_PHYSICAL:
4504        case Calibration::PRESSURE_CALIBRATION_AMPLITUDE:
4505            pressure = in.pressure * mPressureScale;
4506            break;
4507        default:
4508            pressure = in.isHovering ? 0 : 1;
4509            break;
4510        }
4511
4512        // Tilt and Orientation
4513        float tilt;
4514        float orientation;
4515        if (mHaveTilt) {
4516            float tiltXAngle = (in.tiltX - mTiltXCenter) * mTiltXScale;
4517            float tiltYAngle = (in.tiltY - mTiltYCenter) * mTiltYScale;
4518            orientation = atan2f(-sinf(tiltXAngle), sinf(tiltYAngle));
4519            tilt = acosf(cosf(tiltXAngle) * cosf(tiltYAngle));
4520        } else {
4521            tilt = 0;
4522
4523            switch (mCalibration.orientationCalibration) {
4524            case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
4525                orientation = in.orientation * mOrientationScale;
4526                break;
4527            case Calibration::ORIENTATION_CALIBRATION_VECTOR: {
4528                int32_t c1 = signExtendNybble((in.orientation & 0xf0) >> 4);
4529                int32_t c2 = signExtendNybble(in.orientation & 0x0f);
4530                if (c1 != 0 || c2 != 0) {
4531                    orientation = atan2f(c1, c2) * 0.5f;
4532                    float confidence = hypotf(c1, c2);
4533                    float scale = 1.0f + confidence / 16.0f;
4534                    touchMajor *= scale;
4535                    touchMinor /= scale;
4536                    toolMajor *= scale;
4537                    toolMinor /= scale;
4538                } else {
4539                    orientation = 0;
4540                }
4541                break;
4542            }
4543            default:
4544                orientation = 0;
4545            }
4546        }
4547
4548        // Distance
4549        float distance;
4550        switch (mCalibration.distanceCalibration) {
4551        case Calibration::DISTANCE_CALIBRATION_SCALED:
4552            distance = in.distance * mDistanceScale;
4553            break;
4554        default:
4555            distance = 0;
4556        }
4557
4558        // Coverage
4559        int32_t rawLeft, rawTop, rawRight, rawBottom;
4560        switch (mCalibration.coverageCalibration) {
4561        case Calibration::COVERAGE_CALIBRATION_BOX:
4562            rawLeft = (in.toolMinor & 0xffff0000) >> 16;
4563            rawRight = in.toolMinor & 0x0000ffff;
4564            rawBottom = in.toolMajor & 0x0000ffff;
4565            rawTop = (in.toolMajor & 0xffff0000) >> 16;
4566            break;
4567        default:
4568            rawLeft = rawTop = rawRight = rawBottom = 0;
4569            break;
4570        }
4571
4572        // Adjust X,Y coords for device calibration
4573        // TODO: Adjust coverage coords?
4574        float xTransformed = in.x, yTransformed = in.y;
4575        mAffineTransform.applyTo(xTransformed, yTransformed);
4576
4577        // Adjust X, Y, and coverage coords for surface orientation.
4578        float x, y;
4579        float left, top, right, bottom;
4580
4581        switch (mSurfaceOrientation) {
4582        case DISPLAY_ORIENTATION_90:
4583            x = float(yTransformed - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4584            y = float(mRawPointerAxes.x.maxValue - xTransformed) * mXScale + mXTranslate;
4585            left = float(rawTop - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4586            right = float(rawBottom- mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4587            bottom = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale + mXTranslate;
4588            top = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale + mXTranslate;
4589            orientation -= M_PI_2;
4590            if (mOrientedRanges.haveOrientation && orientation < mOrientedRanges.orientation.min) {
4591                orientation += (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
4592            }
4593            break;
4594        case DISPLAY_ORIENTATION_180:
4595            x = float(mRawPointerAxes.x.maxValue - xTransformed) * mXScale + mXTranslate;
4596            y = float(mRawPointerAxes.y.maxValue - yTransformed) * mYScale + mYTranslate;
4597            left = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale + mXTranslate;
4598            right = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale + mXTranslate;
4599            bottom = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale + mYTranslate;
4600            top = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale + mYTranslate;
4601            orientation -= M_PI;
4602            if (mOrientedRanges.haveOrientation && orientation < mOrientedRanges.orientation.min) {
4603                orientation += (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
4604            }
4605            break;
4606        case DISPLAY_ORIENTATION_270:
4607            x = float(mRawPointerAxes.y.maxValue - yTransformed) * mYScale + mYTranslate;
4608            y = float(xTransformed - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4609            left = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale + mYTranslate;
4610            right = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale + mYTranslate;
4611            bottom = float(rawRight - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4612            top = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4613            orientation += M_PI_2;
4614            if (mOrientedRanges.haveOrientation && orientation > mOrientedRanges.orientation.max) {
4615                orientation -= (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
4616            }
4617            break;
4618        default:
4619            x = float(xTransformed - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4620            y = float(yTransformed - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4621            left = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4622            right = float(rawRight - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4623            bottom = float(rawBottom - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4624            top = float(rawTop - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4625            break;
4626        }
4627
4628        // Write output coords.
4629        PointerCoords& out = mCurrentCookedState.cookedPointerData.pointerCoords[i];
4630        out.clear();
4631        out.setAxisValue(AMOTION_EVENT_AXIS_X, x);
4632        out.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
4633        out.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, pressure);
4634        out.setAxisValue(AMOTION_EVENT_AXIS_SIZE, size);
4635        out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR, touchMajor);
4636        out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR, touchMinor);
4637        out.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, orientation);
4638        out.setAxisValue(AMOTION_EVENT_AXIS_TILT, tilt);
4639        out.setAxisValue(AMOTION_EVENT_AXIS_DISTANCE, distance);
4640        if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_BOX) {
4641            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_1, left);
4642            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_2, top);
4643            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_3, right);
4644            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_4, bottom);
4645        } else {
4646            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, toolMajor);
4647            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR, toolMinor);
4648        }
4649
4650        // Write output properties.
4651        PointerProperties& properties =
4652                mCurrentCookedState.cookedPointerData.pointerProperties[i];
4653        uint32_t id = in.id;
4654        properties.clear();
4655        properties.id = id;
4656        properties.toolType = in.toolType;
4657
4658        // Write id index.
4659        mCurrentCookedState.cookedPointerData.idToIndex[id] = i;
4660    }
4661}
4662
4663void TouchInputMapper::dispatchPointerUsage(nsecs_t when, uint32_t policyFlags,
4664        PointerUsage pointerUsage) {
4665    if (pointerUsage != mPointerUsage) {
4666        abortPointerUsage(when, policyFlags);
4667        mPointerUsage = pointerUsage;
4668    }
4669
4670    switch (mPointerUsage) {
4671    case POINTER_USAGE_GESTURES:
4672        dispatchPointerGestures(when, policyFlags, false /*isTimeout*/);
4673        break;
4674    case POINTER_USAGE_STYLUS:
4675        dispatchPointerStylus(when, policyFlags);
4676        break;
4677    case POINTER_USAGE_MOUSE:
4678        dispatchPointerMouse(when, policyFlags);
4679        break;
4680    default:
4681        break;
4682    }
4683}
4684
4685void TouchInputMapper::abortPointerUsage(nsecs_t when, uint32_t policyFlags) {
4686    switch (mPointerUsage) {
4687    case POINTER_USAGE_GESTURES:
4688        abortPointerGestures(when, policyFlags);
4689        break;
4690    case POINTER_USAGE_STYLUS:
4691        abortPointerStylus(when, policyFlags);
4692        break;
4693    case POINTER_USAGE_MOUSE:
4694        abortPointerMouse(when, policyFlags);
4695        break;
4696    default:
4697        break;
4698    }
4699
4700    mPointerUsage = POINTER_USAGE_NONE;
4701}
4702
4703void TouchInputMapper::dispatchPointerGestures(nsecs_t when, uint32_t policyFlags,
4704        bool isTimeout) {
4705    // Update current gesture coordinates.
4706    bool cancelPreviousGesture, finishPreviousGesture;
4707    bool sendEvents = preparePointerGestures(when,
4708            &cancelPreviousGesture, &finishPreviousGesture, isTimeout);
4709    if (!sendEvents) {
4710        return;
4711    }
4712    if (finishPreviousGesture) {
4713        cancelPreviousGesture = false;
4714    }
4715
4716    // Update the pointer presentation and spots.
4717    if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS) {
4718        mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_SPOT);
4719        if (finishPreviousGesture || cancelPreviousGesture) {
4720            mPointerController->clearSpots();
4721        }
4722        mPointerController->setSpots(mPointerGesture.currentGestureCoords,
4723                mPointerGesture.currentGestureIdToIndex,
4724                mPointerGesture.currentGestureIdBits);
4725    } else {
4726        mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
4727    }
4728
4729    // Show or hide the pointer if needed.
4730    switch (mPointerGesture.currentGestureMode) {
4731    case PointerGesture::NEUTRAL:
4732    case PointerGesture::QUIET:
4733        if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS
4734                && (mPointerGesture.lastGestureMode == PointerGesture::SWIPE
4735                        || mPointerGesture.lastGestureMode == PointerGesture::FREEFORM)) {
4736            // Remind the user of where the pointer is after finishing a gesture with spots.
4737            mPointerController->unfade(PointerControllerInterface::TRANSITION_GRADUAL);
4738        }
4739        break;
4740    case PointerGesture::TAP:
4741    case PointerGesture::TAP_DRAG:
4742    case PointerGesture::BUTTON_CLICK_OR_DRAG:
4743    case PointerGesture::HOVER:
4744    case PointerGesture::PRESS:
4745        // Unfade the pointer when the current gesture manipulates the
4746        // area directly under the pointer.
4747        mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
4748        break;
4749    case PointerGesture::SWIPE:
4750    case PointerGesture::FREEFORM:
4751        // Fade the pointer when the current gesture manipulates a different
4752        // area and there are spots to guide the user experience.
4753        if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS) {
4754            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
4755        } else {
4756            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
4757        }
4758        break;
4759    }
4760
4761    // Send events!
4762    int32_t metaState = getContext()->getGlobalMetaState();
4763    int32_t buttonState = mCurrentRawState.buttonState;
4764
4765    // Update last coordinates of pointers that have moved so that we observe the new
4766    // pointer positions at the same time as other pointers that have just gone up.
4767    bool down = mPointerGesture.currentGestureMode == PointerGesture::TAP
4768            || mPointerGesture.currentGestureMode == PointerGesture::TAP_DRAG
4769            || mPointerGesture.currentGestureMode == PointerGesture::BUTTON_CLICK_OR_DRAG
4770            || mPointerGesture.currentGestureMode == PointerGesture::PRESS
4771            || mPointerGesture.currentGestureMode == PointerGesture::SWIPE
4772            || mPointerGesture.currentGestureMode == PointerGesture::FREEFORM;
4773    bool moveNeeded = false;
4774    if (down && !cancelPreviousGesture && !finishPreviousGesture
4775            && !mPointerGesture.lastGestureIdBits.isEmpty()
4776            && !mPointerGesture.currentGestureIdBits.isEmpty()) {
4777        BitSet32 movedGestureIdBits(mPointerGesture.currentGestureIdBits.value
4778                & mPointerGesture.lastGestureIdBits.value);
4779        moveNeeded = updateMovedPointers(mPointerGesture.currentGestureProperties,
4780                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
4781                mPointerGesture.lastGestureProperties,
4782                mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
4783                movedGestureIdBits);
4784        if (buttonState != mLastRawState.buttonState) {
4785            moveNeeded = true;
4786        }
4787    }
4788
4789    // Send motion events for all pointers that went up or were canceled.
4790    BitSet32 dispatchedGestureIdBits(mPointerGesture.lastGestureIdBits);
4791    if (!dispatchedGestureIdBits.isEmpty()) {
4792        if (cancelPreviousGesture) {
4793            dispatchMotion(when, policyFlags, mSource,
4794                    AMOTION_EVENT_ACTION_CANCEL, 0, metaState, buttonState,
4795                    AMOTION_EVENT_EDGE_FLAG_NONE,
4796                    mPointerGesture.lastGestureProperties,
4797                    mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
4798                    dispatchedGestureIdBits, -1,
4799                    0, 0, mPointerGesture.downTime);
4800
4801            dispatchedGestureIdBits.clear();
4802        } else {
4803            BitSet32 upGestureIdBits;
4804            if (finishPreviousGesture) {
4805                upGestureIdBits = dispatchedGestureIdBits;
4806            } else {
4807                upGestureIdBits.value = dispatchedGestureIdBits.value
4808                        & ~mPointerGesture.currentGestureIdBits.value;
4809            }
4810            while (!upGestureIdBits.isEmpty()) {
4811                uint32_t id = upGestureIdBits.clearFirstMarkedBit();
4812
4813                dispatchMotion(when, policyFlags, mSource,
4814                        AMOTION_EVENT_ACTION_POINTER_UP, 0,
4815                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
4816                        mPointerGesture.lastGestureProperties,
4817                        mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
4818                        dispatchedGestureIdBits, id,
4819                        0, 0, mPointerGesture.downTime);
4820
4821                dispatchedGestureIdBits.clearBit(id);
4822            }
4823        }
4824    }
4825
4826    // Send motion events for all pointers that moved.
4827    if (moveNeeded) {
4828        dispatchMotion(when, policyFlags, mSource,
4829                AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
4830                mPointerGesture.currentGestureProperties,
4831                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
4832                dispatchedGestureIdBits, -1,
4833                0, 0, mPointerGesture.downTime);
4834    }
4835
4836    // Send motion events for all pointers that went down.
4837    if (down) {
4838        BitSet32 downGestureIdBits(mPointerGesture.currentGestureIdBits.value
4839                & ~dispatchedGestureIdBits.value);
4840        while (!downGestureIdBits.isEmpty()) {
4841            uint32_t id = downGestureIdBits.clearFirstMarkedBit();
4842            dispatchedGestureIdBits.markBit(id);
4843
4844            if (dispatchedGestureIdBits.count() == 1) {
4845                mPointerGesture.downTime = when;
4846            }
4847
4848            dispatchMotion(when, policyFlags, mSource,
4849                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, metaState, buttonState, 0,
4850                    mPointerGesture.currentGestureProperties,
4851                    mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
4852                    dispatchedGestureIdBits, id,
4853                    0, 0, mPointerGesture.downTime);
4854        }
4855    }
4856
4857    // Send motion events for hover.
4858    if (mPointerGesture.currentGestureMode == PointerGesture::HOVER) {
4859        dispatchMotion(when, policyFlags, mSource,
4860                AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
4861                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
4862                mPointerGesture.currentGestureProperties,
4863                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
4864                mPointerGesture.currentGestureIdBits, -1,
4865                0, 0, mPointerGesture.downTime);
4866    } else if (dispatchedGestureIdBits.isEmpty()
4867            && !mPointerGesture.lastGestureIdBits.isEmpty()) {
4868        // Synthesize a hover move event after all pointers go up to indicate that
4869        // the pointer is hovering again even if the user is not currently touching
4870        // the touch pad.  This ensures that a view will receive a fresh hover enter
4871        // event after a tap.
4872        float x, y;
4873        mPointerController->getPosition(&x, &y);
4874
4875        PointerProperties pointerProperties;
4876        pointerProperties.clear();
4877        pointerProperties.id = 0;
4878        pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
4879
4880        PointerCoords pointerCoords;
4881        pointerCoords.clear();
4882        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
4883        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
4884
4885        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
4886                AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
4887                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
4888                mViewport.displayId, 1, &pointerProperties, &pointerCoords,
4889                0, 0, mPointerGesture.downTime);
4890        getListener()->notifyMotion(&args);
4891    }
4892
4893    // Update state.
4894    mPointerGesture.lastGestureMode = mPointerGesture.currentGestureMode;
4895    if (!down) {
4896        mPointerGesture.lastGestureIdBits.clear();
4897    } else {
4898        mPointerGesture.lastGestureIdBits = mPointerGesture.currentGestureIdBits;
4899        for (BitSet32 idBits(mPointerGesture.currentGestureIdBits); !idBits.isEmpty(); ) {
4900            uint32_t id = idBits.clearFirstMarkedBit();
4901            uint32_t index = mPointerGesture.currentGestureIdToIndex[id];
4902            mPointerGesture.lastGestureProperties[index].copyFrom(
4903                    mPointerGesture.currentGestureProperties[index]);
4904            mPointerGesture.lastGestureCoords[index].copyFrom(
4905                    mPointerGesture.currentGestureCoords[index]);
4906            mPointerGesture.lastGestureIdToIndex[id] = index;
4907        }
4908    }
4909}
4910
4911void TouchInputMapper::abortPointerGestures(nsecs_t when, uint32_t policyFlags) {
4912    // Cancel previously dispatches pointers.
4913    if (!mPointerGesture.lastGestureIdBits.isEmpty()) {
4914        int32_t metaState = getContext()->getGlobalMetaState();
4915        int32_t buttonState = mCurrentRawState.buttonState;
4916        dispatchMotion(when, policyFlags, mSource,
4917                AMOTION_EVENT_ACTION_CANCEL, 0, metaState, buttonState,
4918                AMOTION_EVENT_EDGE_FLAG_NONE,
4919                mPointerGesture.lastGestureProperties,
4920                mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
4921                mPointerGesture.lastGestureIdBits, -1,
4922                0, 0, mPointerGesture.downTime);
4923    }
4924
4925    // Reset the current pointer gesture.
4926    mPointerGesture.reset();
4927    mPointerVelocityControl.reset();
4928
4929    // Remove any current spots.
4930    if (mPointerController != NULL) {
4931        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
4932        mPointerController->clearSpots();
4933    }
4934}
4935
4936bool TouchInputMapper::preparePointerGestures(nsecs_t when,
4937        bool* outCancelPreviousGesture, bool* outFinishPreviousGesture, bool isTimeout) {
4938    *outCancelPreviousGesture = false;
4939    *outFinishPreviousGesture = false;
4940
4941    // Handle TAP timeout.
4942    if (isTimeout) {
4943#if DEBUG_GESTURES
4944        ALOGD("Gestures: Processing timeout");
4945#endif
4946
4947        if (mPointerGesture.lastGestureMode == PointerGesture::TAP) {
4948            if (when <= mPointerGesture.tapUpTime + mConfig.pointerGestureTapDragInterval) {
4949                // The tap/drag timeout has not yet expired.
4950                getContext()->requestTimeoutAtTime(mPointerGesture.tapUpTime
4951                        + mConfig.pointerGestureTapDragInterval);
4952            } else {
4953                // The tap is finished.
4954#if DEBUG_GESTURES
4955                ALOGD("Gestures: TAP finished");
4956#endif
4957                *outFinishPreviousGesture = true;
4958
4959                mPointerGesture.activeGestureId = -1;
4960                mPointerGesture.currentGestureMode = PointerGesture::NEUTRAL;
4961                mPointerGesture.currentGestureIdBits.clear();
4962
4963                mPointerVelocityControl.reset();
4964                return true;
4965            }
4966        }
4967
4968        // We did not handle this timeout.
4969        return false;
4970    }
4971
4972    const uint32_t currentFingerCount = mCurrentCookedState.fingerIdBits.count();
4973    const uint32_t lastFingerCount = mLastCookedState.fingerIdBits.count();
4974
4975    // Update the velocity tracker.
4976    {
4977        VelocityTracker::Position positions[MAX_POINTERS];
4978        uint32_t count = 0;
4979        for (BitSet32 idBits(mCurrentCookedState.fingerIdBits); !idBits.isEmpty(); count++) {
4980            uint32_t id = idBits.clearFirstMarkedBit();
4981            const RawPointerData::Pointer& pointer =
4982                    mCurrentRawState.rawPointerData.pointerForId(id);
4983            positions[count].x = pointer.x * mPointerXMovementScale;
4984            positions[count].y = pointer.y * mPointerYMovementScale;
4985        }
4986        mPointerGesture.velocityTracker.addMovement(when,
4987                mCurrentCookedState.fingerIdBits, positions);
4988    }
4989
4990    // If the gesture ever enters a mode other than TAP, HOVER or TAP_DRAG, without first returning
4991    // to NEUTRAL, then we should not generate tap event.
4992    if (mPointerGesture.lastGestureMode != PointerGesture::HOVER
4993            && mPointerGesture.lastGestureMode != PointerGesture::TAP
4994            && mPointerGesture.lastGestureMode != PointerGesture::TAP_DRAG) {
4995        mPointerGesture.resetTap();
4996    }
4997
4998    // Pick a new active touch id if needed.
4999    // Choose an arbitrary pointer that just went down, if there is one.
5000    // Otherwise choose an arbitrary remaining pointer.
5001    // This guarantees we always have an active touch id when there is at least one pointer.
5002    // We keep the same active touch id for as long as possible.
5003    bool activeTouchChanged = false;
5004    int32_t lastActiveTouchId = mPointerGesture.activeTouchId;
5005    int32_t activeTouchId = lastActiveTouchId;
5006    if (activeTouchId < 0) {
5007        if (!mCurrentCookedState.fingerIdBits.isEmpty()) {
5008            activeTouchChanged = true;
5009            activeTouchId = mPointerGesture.activeTouchId =
5010                    mCurrentCookedState.fingerIdBits.firstMarkedBit();
5011            mPointerGesture.firstTouchTime = when;
5012        }
5013    } else if (!mCurrentCookedState.fingerIdBits.hasBit(activeTouchId)) {
5014        activeTouchChanged = true;
5015        if (!mCurrentCookedState.fingerIdBits.isEmpty()) {
5016            activeTouchId = mPointerGesture.activeTouchId =
5017                    mCurrentCookedState.fingerIdBits.firstMarkedBit();
5018        } else {
5019            activeTouchId = mPointerGesture.activeTouchId = -1;
5020        }
5021    }
5022
5023    // Determine whether we are in quiet time.
5024    bool isQuietTime = false;
5025    if (activeTouchId < 0) {
5026        mPointerGesture.resetQuietTime();
5027    } else {
5028        isQuietTime = when < mPointerGesture.quietTime + mConfig.pointerGestureQuietInterval;
5029        if (!isQuietTime) {
5030            if ((mPointerGesture.lastGestureMode == PointerGesture::PRESS
5031                    || mPointerGesture.lastGestureMode == PointerGesture::SWIPE
5032                    || mPointerGesture.lastGestureMode == PointerGesture::FREEFORM)
5033                    && currentFingerCount < 2) {
5034                // Enter quiet time when exiting swipe or freeform state.
5035                // This is to prevent accidentally entering the hover state and flinging the
5036                // pointer when finishing a swipe and there is still one pointer left onscreen.
5037                isQuietTime = true;
5038            } else if (mPointerGesture.lastGestureMode == PointerGesture::BUTTON_CLICK_OR_DRAG
5039                    && currentFingerCount >= 2
5040                    && !isPointerDown(mCurrentRawState.buttonState)) {
5041                // Enter quiet time when releasing the button and there are still two or more
5042                // fingers down.  This may indicate that one finger was used to press the button
5043                // but it has not gone up yet.
5044                isQuietTime = true;
5045            }
5046            if (isQuietTime) {
5047                mPointerGesture.quietTime = when;
5048            }
5049        }
5050    }
5051
5052    // Switch states based on button and pointer state.
5053    if (isQuietTime) {
5054        // Case 1: Quiet time. (QUIET)
5055#if DEBUG_GESTURES
5056        ALOGD("Gestures: QUIET for next %0.3fms", (mPointerGesture.quietTime
5057                + mConfig.pointerGestureQuietInterval - when) * 0.000001f);
5058#endif
5059        if (mPointerGesture.lastGestureMode != PointerGesture::QUIET) {
5060            *outFinishPreviousGesture = true;
5061        }
5062
5063        mPointerGesture.activeGestureId = -1;
5064        mPointerGesture.currentGestureMode = PointerGesture::QUIET;
5065        mPointerGesture.currentGestureIdBits.clear();
5066
5067        mPointerVelocityControl.reset();
5068    } else if (isPointerDown(mCurrentRawState.buttonState)) {
5069        // Case 2: Button is pressed. (BUTTON_CLICK_OR_DRAG)
5070        // The pointer follows the active touch point.
5071        // Emit DOWN, MOVE, UP events at the pointer location.
5072        //
5073        // Only the active touch matters; other fingers are ignored.  This policy helps
5074        // to handle the case where the user places a second finger on the touch pad
5075        // to apply the necessary force to depress an integrated button below the surface.
5076        // We don't want the second finger to be delivered to applications.
5077        //
5078        // For this to work well, we need to make sure to track the pointer that is really
5079        // active.  If the user first puts one finger down to click then adds another
5080        // finger to drag then the active pointer should switch to the finger that is
5081        // being dragged.
5082#if DEBUG_GESTURES
5083        ALOGD("Gestures: BUTTON_CLICK_OR_DRAG activeTouchId=%d, "
5084                "currentFingerCount=%d", activeTouchId, currentFingerCount);
5085#endif
5086        // Reset state when just starting.
5087        if (mPointerGesture.lastGestureMode != PointerGesture::BUTTON_CLICK_OR_DRAG) {
5088            *outFinishPreviousGesture = true;
5089            mPointerGesture.activeGestureId = 0;
5090        }
5091
5092        // Switch pointers if needed.
5093        // Find the fastest pointer and follow it.
5094        if (activeTouchId >= 0 && currentFingerCount > 1) {
5095            int32_t bestId = -1;
5096            float bestSpeed = mConfig.pointerGestureDragMinSwitchSpeed;
5097            for (BitSet32 idBits(mCurrentCookedState.fingerIdBits); !idBits.isEmpty(); ) {
5098                uint32_t id = idBits.clearFirstMarkedBit();
5099                float vx, vy;
5100                if (mPointerGesture.velocityTracker.getVelocity(id, &vx, &vy)) {
5101                    float speed = hypotf(vx, vy);
5102                    if (speed > bestSpeed) {
5103                        bestId = id;
5104                        bestSpeed = speed;
5105                    }
5106                }
5107            }
5108            if (bestId >= 0 && bestId != activeTouchId) {
5109                mPointerGesture.activeTouchId = activeTouchId = bestId;
5110                activeTouchChanged = true;
5111#if DEBUG_GESTURES
5112                ALOGD("Gestures: BUTTON_CLICK_OR_DRAG switched pointers, "
5113                        "bestId=%d, bestSpeed=%0.3f", bestId, bestSpeed);
5114#endif
5115            }
5116        }
5117
5118        if (activeTouchId >= 0 && mLastCookedState.fingerIdBits.hasBit(activeTouchId)) {
5119            const RawPointerData::Pointer& currentPointer =
5120                    mCurrentRawState.rawPointerData.pointerForId(activeTouchId);
5121            const RawPointerData::Pointer& lastPointer =
5122                    mLastRawState.rawPointerData.pointerForId(activeTouchId);
5123            float deltaX = (currentPointer.x - lastPointer.x) * mPointerXMovementScale;
5124            float deltaY = (currentPointer.y - lastPointer.y) * mPointerYMovementScale;
5125
5126            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5127            mPointerVelocityControl.move(when, &deltaX, &deltaY);
5128
5129            // Move the pointer using a relative motion.
5130            // When using spots, the click will occur at the position of the anchor
5131            // spot and all other spots will move there.
5132            mPointerController->move(deltaX, deltaY);
5133        } else {
5134            mPointerVelocityControl.reset();
5135        }
5136
5137        float x, y;
5138        mPointerController->getPosition(&x, &y);
5139
5140        mPointerGesture.currentGestureMode = PointerGesture::BUTTON_CLICK_OR_DRAG;
5141        mPointerGesture.currentGestureIdBits.clear();
5142        mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
5143        mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
5144        mPointerGesture.currentGestureProperties[0].clear();
5145        mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
5146        mPointerGesture.currentGestureProperties[0].toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
5147        mPointerGesture.currentGestureCoords[0].clear();
5148        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
5149        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5150        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5151    } else if (currentFingerCount == 0) {
5152        // Case 3. No fingers down and button is not pressed. (NEUTRAL)
5153        if (mPointerGesture.lastGestureMode != PointerGesture::NEUTRAL) {
5154            *outFinishPreviousGesture = true;
5155        }
5156
5157        // Watch for taps coming out of HOVER or TAP_DRAG mode.
5158        // Checking for taps after TAP_DRAG allows us to detect double-taps.
5159        bool tapped = false;
5160        if ((mPointerGesture.lastGestureMode == PointerGesture::HOVER
5161                || mPointerGesture.lastGestureMode == PointerGesture::TAP_DRAG)
5162                && lastFingerCount == 1) {
5163            if (when <= mPointerGesture.tapDownTime + mConfig.pointerGestureTapInterval) {
5164                float x, y;
5165                mPointerController->getPosition(&x, &y);
5166                if (fabs(x - mPointerGesture.tapX) <= mConfig.pointerGestureTapSlop
5167                        && fabs(y - mPointerGesture.tapY) <= mConfig.pointerGestureTapSlop) {
5168#if DEBUG_GESTURES
5169                    ALOGD("Gestures: TAP");
5170#endif
5171
5172                    mPointerGesture.tapUpTime = when;
5173                    getContext()->requestTimeoutAtTime(when
5174                            + mConfig.pointerGestureTapDragInterval);
5175
5176                    mPointerGesture.activeGestureId = 0;
5177                    mPointerGesture.currentGestureMode = PointerGesture::TAP;
5178                    mPointerGesture.currentGestureIdBits.clear();
5179                    mPointerGesture.currentGestureIdBits.markBit(
5180                            mPointerGesture.activeGestureId);
5181                    mPointerGesture.currentGestureIdToIndex[
5182                            mPointerGesture.activeGestureId] = 0;
5183                    mPointerGesture.currentGestureProperties[0].clear();
5184                    mPointerGesture.currentGestureProperties[0].id =
5185                            mPointerGesture.activeGestureId;
5186                    mPointerGesture.currentGestureProperties[0].toolType =
5187                            AMOTION_EVENT_TOOL_TYPE_FINGER;
5188                    mPointerGesture.currentGestureCoords[0].clear();
5189                    mPointerGesture.currentGestureCoords[0].setAxisValue(
5190                            AMOTION_EVENT_AXIS_X, mPointerGesture.tapX);
5191                    mPointerGesture.currentGestureCoords[0].setAxisValue(
5192                            AMOTION_EVENT_AXIS_Y, mPointerGesture.tapY);
5193                    mPointerGesture.currentGestureCoords[0].setAxisValue(
5194                            AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5195
5196                    tapped = true;
5197                } else {
5198#if DEBUG_GESTURES
5199                    ALOGD("Gestures: Not a TAP, deltaX=%f, deltaY=%f",
5200                            x - mPointerGesture.tapX,
5201                            y - mPointerGesture.tapY);
5202#endif
5203                }
5204            } else {
5205#if DEBUG_GESTURES
5206                if (mPointerGesture.tapDownTime != LLONG_MIN) {
5207                    ALOGD("Gestures: Not a TAP, %0.3fms since down",
5208                            (when - mPointerGesture.tapDownTime) * 0.000001f);
5209                } else {
5210                    ALOGD("Gestures: Not a TAP, incompatible mode transitions");
5211                }
5212#endif
5213            }
5214        }
5215
5216        mPointerVelocityControl.reset();
5217
5218        if (!tapped) {
5219#if DEBUG_GESTURES
5220            ALOGD("Gestures: NEUTRAL");
5221#endif
5222            mPointerGesture.activeGestureId = -1;
5223            mPointerGesture.currentGestureMode = PointerGesture::NEUTRAL;
5224            mPointerGesture.currentGestureIdBits.clear();
5225        }
5226    } else if (currentFingerCount == 1) {
5227        // Case 4. Exactly one finger down, button is not pressed. (HOVER or TAP_DRAG)
5228        // The pointer follows the active touch point.
5229        // When in HOVER, emit HOVER_MOVE events at the pointer location.
5230        // When in TAP_DRAG, emit MOVE events at the pointer location.
5231        ALOG_ASSERT(activeTouchId >= 0);
5232
5233        mPointerGesture.currentGestureMode = PointerGesture::HOVER;
5234        if (mPointerGesture.lastGestureMode == PointerGesture::TAP) {
5235            if (when <= mPointerGesture.tapUpTime + mConfig.pointerGestureTapDragInterval) {
5236                float x, y;
5237                mPointerController->getPosition(&x, &y);
5238                if (fabs(x - mPointerGesture.tapX) <= mConfig.pointerGestureTapSlop
5239                        && fabs(y - mPointerGesture.tapY) <= mConfig.pointerGestureTapSlop) {
5240                    mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
5241                } else {
5242#if DEBUG_GESTURES
5243                    ALOGD("Gestures: Not a TAP_DRAG, deltaX=%f, deltaY=%f",
5244                            x - mPointerGesture.tapX,
5245                            y - mPointerGesture.tapY);
5246#endif
5247                }
5248            } else {
5249#if DEBUG_GESTURES
5250                ALOGD("Gestures: Not a TAP_DRAG, %0.3fms time since up",
5251                        (when - mPointerGesture.tapUpTime) * 0.000001f);
5252#endif
5253            }
5254        } else if (mPointerGesture.lastGestureMode == PointerGesture::TAP_DRAG) {
5255            mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
5256        }
5257
5258        if (mLastCookedState.fingerIdBits.hasBit(activeTouchId)) {
5259            const RawPointerData::Pointer& currentPointer =
5260                    mCurrentRawState.rawPointerData.pointerForId(activeTouchId);
5261            const RawPointerData::Pointer& lastPointer =
5262                    mLastRawState.rawPointerData.pointerForId(activeTouchId);
5263            float deltaX = (currentPointer.x - lastPointer.x)
5264                    * mPointerXMovementScale;
5265            float deltaY = (currentPointer.y - lastPointer.y)
5266                    * mPointerYMovementScale;
5267
5268            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5269            mPointerVelocityControl.move(when, &deltaX, &deltaY);
5270
5271            // Move the pointer using a relative motion.
5272            // When using spots, the hover or drag will occur at the position of the anchor spot.
5273            mPointerController->move(deltaX, deltaY);
5274        } else {
5275            mPointerVelocityControl.reset();
5276        }
5277
5278        bool down;
5279        if (mPointerGesture.currentGestureMode == PointerGesture::TAP_DRAG) {
5280#if DEBUG_GESTURES
5281            ALOGD("Gestures: TAP_DRAG");
5282#endif
5283            down = true;
5284        } else {
5285#if DEBUG_GESTURES
5286            ALOGD("Gestures: HOVER");
5287#endif
5288            if (mPointerGesture.lastGestureMode != PointerGesture::HOVER) {
5289                *outFinishPreviousGesture = true;
5290            }
5291            mPointerGesture.activeGestureId = 0;
5292            down = false;
5293        }
5294
5295        float x, y;
5296        mPointerController->getPosition(&x, &y);
5297
5298        mPointerGesture.currentGestureIdBits.clear();
5299        mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
5300        mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
5301        mPointerGesture.currentGestureProperties[0].clear();
5302        mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
5303        mPointerGesture.currentGestureProperties[0].toolType =
5304                AMOTION_EVENT_TOOL_TYPE_FINGER;
5305        mPointerGesture.currentGestureCoords[0].clear();
5306        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
5307        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5308        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
5309                down ? 1.0f : 0.0f);
5310
5311        if (lastFingerCount == 0 && currentFingerCount != 0) {
5312            mPointerGesture.resetTap();
5313            mPointerGesture.tapDownTime = when;
5314            mPointerGesture.tapX = x;
5315            mPointerGesture.tapY = y;
5316        }
5317    } else {
5318        // Case 5. At least two fingers down, button is not pressed. (PRESS, SWIPE or FREEFORM)
5319        // We need to provide feedback for each finger that goes down so we cannot wait
5320        // for the fingers to move before deciding what to do.
5321        //
5322        // The ambiguous case is deciding what to do when there are two fingers down but they
5323        // have not moved enough to determine whether they are part of a drag or part of a
5324        // freeform gesture, or just a press or long-press at the pointer location.
5325        //
5326        // When there are two fingers we start with the PRESS hypothesis and we generate a
5327        // down at the pointer location.
5328        //
5329        // When the two fingers move enough or when additional fingers are added, we make
5330        // a decision to transition into SWIPE or FREEFORM mode accordingly.
5331        ALOG_ASSERT(activeTouchId >= 0);
5332
5333        bool settled = when >= mPointerGesture.firstTouchTime
5334                + mConfig.pointerGestureMultitouchSettleInterval;
5335        if (mPointerGesture.lastGestureMode != PointerGesture::PRESS
5336                && mPointerGesture.lastGestureMode != PointerGesture::SWIPE
5337                && mPointerGesture.lastGestureMode != PointerGesture::FREEFORM) {
5338            *outFinishPreviousGesture = true;
5339        } else if (!settled && currentFingerCount > lastFingerCount) {
5340            // Additional pointers have gone down but not yet settled.
5341            // Reset the gesture.
5342#if DEBUG_GESTURES
5343            ALOGD("Gestures: Resetting gesture since additional pointers went down for MULTITOUCH, "
5344                    "settle time remaining %0.3fms", (mPointerGesture.firstTouchTime
5345                            + mConfig.pointerGestureMultitouchSettleInterval - when)
5346                            * 0.000001f);
5347#endif
5348            *outCancelPreviousGesture = true;
5349        } else {
5350            // Continue previous gesture.
5351            mPointerGesture.currentGestureMode = mPointerGesture.lastGestureMode;
5352        }
5353
5354        if (*outFinishPreviousGesture || *outCancelPreviousGesture) {
5355            mPointerGesture.currentGestureMode = PointerGesture::PRESS;
5356            mPointerGesture.activeGestureId = 0;
5357            mPointerGesture.referenceIdBits.clear();
5358            mPointerVelocityControl.reset();
5359
5360            // Use the centroid and pointer location as the reference points for the gesture.
5361#if DEBUG_GESTURES
5362            ALOGD("Gestures: Using centroid as reference for MULTITOUCH, "
5363                    "settle time remaining %0.3fms", (mPointerGesture.firstTouchTime
5364                            + mConfig.pointerGestureMultitouchSettleInterval - when)
5365                            * 0.000001f);
5366#endif
5367            mCurrentRawState.rawPointerData.getCentroidOfTouchingPointers(
5368                    &mPointerGesture.referenceTouchX,
5369                    &mPointerGesture.referenceTouchY);
5370            mPointerController->getPosition(&mPointerGesture.referenceGestureX,
5371                    &mPointerGesture.referenceGestureY);
5372        }
5373
5374        // Clear the reference deltas for fingers not yet included in the reference calculation.
5375        for (BitSet32 idBits(mCurrentCookedState.fingerIdBits.value
5376                & ~mPointerGesture.referenceIdBits.value); !idBits.isEmpty(); ) {
5377            uint32_t id = idBits.clearFirstMarkedBit();
5378            mPointerGesture.referenceDeltas[id].dx = 0;
5379            mPointerGesture.referenceDeltas[id].dy = 0;
5380        }
5381        mPointerGesture.referenceIdBits = mCurrentCookedState.fingerIdBits;
5382
5383        // Add delta for all fingers and calculate a common movement delta.
5384        float commonDeltaX = 0, commonDeltaY = 0;
5385        BitSet32 commonIdBits(mLastCookedState.fingerIdBits.value
5386                & mCurrentCookedState.fingerIdBits.value);
5387        for (BitSet32 idBits(commonIdBits); !idBits.isEmpty(); ) {
5388            bool first = (idBits == commonIdBits);
5389            uint32_t id = idBits.clearFirstMarkedBit();
5390            const RawPointerData::Pointer& cpd = mCurrentRawState.rawPointerData.pointerForId(id);
5391            const RawPointerData::Pointer& lpd = mLastRawState.rawPointerData.pointerForId(id);
5392            PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
5393            delta.dx += cpd.x - lpd.x;
5394            delta.dy += cpd.y - lpd.y;
5395
5396            if (first) {
5397                commonDeltaX = delta.dx;
5398                commonDeltaY = delta.dy;
5399            } else {
5400                commonDeltaX = calculateCommonVector(commonDeltaX, delta.dx);
5401                commonDeltaY = calculateCommonVector(commonDeltaY, delta.dy);
5402            }
5403        }
5404
5405        // Consider transitions from PRESS to SWIPE or MULTITOUCH.
5406        if (mPointerGesture.currentGestureMode == PointerGesture::PRESS) {
5407            float dist[MAX_POINTER_ID + 1];
5408            int32_t distOverThreshold = 0;
5409            for (BitSet32 idBits(mPointerGesture.referenceIdBits); !idBits.isEmpty(); ) {
5410                uint32_t id = idBits.clearFirstMarkedBit();
5411                PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
5412                dist[id] = hypotf(delta.dx * mPointerXZoomScale,
5413                        delta.dy * mPointerYZoomScale);
5414                if (dist[id] > mConfig.pointerGestureMultitouchMinDistance) {
5415                    distOverThreshold += 1;
5416                }
5417            }
5418
5419            // Only transition when at least two pointers have moved further than
5420            // the minimum distance threshold.
5421            if (distOverThreshold >= 2) {
5422                if (currentFingerCount > 2) {
5423                    // There are more than two pointers, switch to FREEFORM.
5424#if DEBUG_GESTURES
5425                    ALOGD("Gestures: PRESS transitioned to FREEFORM, number of pointers %d > 2",
5426                            currentFingerCount);
5427#endif
5428                    *outCancelPreviousGesture = true;
5429                    mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5430                } else {
5431                    // There are exactly two pointers.
5432                    BitSet32 idBits(mCurrentCookedState.fingerIdBits);
5433                    uint32_t id1 = idBits.clearFirstMarkedBit();
5434                    uint32_t id2 = idBits.firstMarkedBit();
5435                    const RawPointerData::Pointer& p1 =
5436                            mCurrentRawState.rawPointerData.pointerForId(id1);
5437                    const RawPointerData::Pointer& p2 =
5438                            mCurrentRawState.rawPointerData.pointerForId(id2);
5439                    float mutualDistance = distance(p1.x, p1.y, p2.x, p2.y);
5440                    if (mutualDistance > mPointerGestureMaxSwipeWidth) {
5441                        // There are two pointers but they are too far apart for a SWIPE,
5442                        // switch to FREEFORM.
5443#if DEBUG_GESTURES
5444                        ALOGD("Gestures: PRESS transitioned to FREEFORM, distance %0.3f > %0.3f",
5445                                mutualDistance, mPointerGestureMaxSwipeWidth);
5446#endif
5447                        *outCancelPreviousGesture = true;
5448                        mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5449                    } else {
5450                        // There are two pointers.  Wait for both pointers to start moving
5451                        // before deciding whether this is a SWIPE or FREEFORM gesture.
5452                        float dist1 = dist[id1];
5453                        float dist2 = dist[id2];
5454                        if (dist1 >= mConfig.pointerGestureMultitouchMinDistance
5455                                && dist2 >= mConfig.pointerGestureMultitouchMinDistance) {
5456                            // Calculate the dot product of the displacement vectors.
5457                            // When the vectors are oriented in approximately the same direction,
5458                            // the angle betweeen them is near zero and the cosine of the angle
5459                            // approches 1.0.  Recall that dot(v1, v2) = cos(angle) * mag(v1) * mag(v2).
5460                            PointerGesture::Delta& delta1 = mPointerGesture.referenceDeltas[id1];
5461                            PointerGesture::Delta& delta2 = mPointerGesture.referenceDeltas[id2];
5462                            float dx1 = delta1.dx * mPointerXZoomScale;
5463                            float dy1 = delta1.dy * mPointerYZoomScale;
5464                            float dx2 = delta2.dx * mPointerXZoomScale;
5465                            float dy2 = delta2.dy * mPointerYZoomScale;
5466                            float dot = dx1 * dx2 + dy1 * dy2;
5467                            float cosine = dot / (dist1 * dist2); // denominator always > 0
5468                            if (cosine >= mConfig.pointerGestureSwipeTransitionAngleCosine) {
5469                                // Pointers are moving in the same direction.  Switch to SWIPE.
5470#if DEBUG_GESTURES
5471                                ALOGD("Gestures: PRESS transitioned to SWIPE, "
5472                                        "dist1 %0.3f >= %0.3f, dist2 %0.3f >= %0.3f, "
5473                                        "cosine %0.3f >= %0.3f",
5474                                        dist1, mConfig.pointerGestureMultitouchMinDistance,
5475                                        dist2, mConfig.pointerGestureMultitouchMinDistance,
5476                                        cosine, mConfig.pointerGestureSwipeTransitionAngleCosine);
5477#endif
5478                                mPointerGesture.currentGestureMode = PointerGesture::SWIPE;
5479                            } else {
5480                                // Pointers are moving in different directions.  Switch to FREEFORM.
5481#if DEBUG_GESTURES
5482                                ALOGD("Gestures: PRESS transitioned to FREEFORM, "
5483                                        "dist1 %0.3f >= %0.3f, dist2 %0.3f >= %0.3f, "
5484                                        "cosine %0.3f < %0.3f",
5485                                        dist1, mConfig.pointerGestureMultitouchMinDistance,
5486                                        dist2, mConfig.pointerGestureMultitouchMinDistance,
5487                                        cosine, mConfig.pointerGestureSwipeTransitionAngleCosine);
5488#endif
5489                                *outCancelPreviousGesture = true;
5490                                mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5491                            }
5492                        }
5493                    }
5494                }
5495            }
5496        } else if (mPointerGesture.currentGestureMode == PointerGesture::SWIPE) {
5497            // Switch from SWIPE to FREEFORM if additional pointers go down.
5498            // Cancel previous gesture.
5499            if (currentFingerCount > 2) {
5500#if DEBUG_GESTURES
5501                ALOGD("Gestures: SWIPE transitioned to FREEFORM, number of pointers %d > 2",
5502                        currentFingerCount);
5503#endif
5504                *outCancelPreviousGesture = true;
5505                mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5506            }
5507        }
5508
5509        // Move the reference points based on the overall group motion of the fingers
5510        // except in PRESS mode while waiting for a transition to occur.
5511        if (mPointerGesture.currentGestureMode != PointerGesture::PRESS
5512                && (commonDeltaX || commonDeltaY)) {
5513            for (BitSet32 idBits(mPointerGesture.referenceIdBits); !idBits.isEmpty(); ) {
5514                uint32_t id = idBits.clearFirstMarkedBit();
5515                PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
5516                delta.dx = 0;
5517                delta.dy = 0;
5518            }
5519
5520            mPointerGesture.referenceTouchX += commonDeltaX;
5521            mPointerGesture.referenceTouchY += commonDeltaY;
5522
5523            commonDeltaX *= mPointerXMovementScale;
5524            commonDeltaY *= mPointerYMovementScale;
5525
5526            rotateDelta(mSurfaceOrientation, &commonDeltaX, &commonDeltaY);
5527            mPointerVelocityControl.move(when, &commonDeltaX, &commonDeltaY);
5528
5529            mPointerGesture.referenceGestureX += commonDeltaX;
5530            mPointerGesture.referenceGestureY += commonDeltaY;
5531        }
5532
5533        // Report gestures.
5534        if (mPointerGesture.currentGestureMode == PointerGesture::PRESS
5535                || mPointerGesture.currentGestureMode == PointerGesture::SWIPE) {
5536            // PRESS or SWIPE mode.
5537#if DEBUG_GESTURES
5538            ALOGD("Gestures: PRESS or SWIPE activeTouchId=%d,"
5539                    "activeGestureId=%d, currentTouchPointerCount=%d",
5540                    activeTouchId, mPointerGesture.activeGestureId, currentFingerCount);
5541#endif
5542            ALOG_ASSERT(mPointerGesture.activeGestureId >= 0);
5543
5544            mPointerGesture.currentGestureIdBits.clear();
5545            mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
5546            mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
5547            mPointerGesture.currentGestureProperties[0].clear();
5548            mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
5549            mPointerGesture.currentGestureProperties[0].toolType =
5550                    AMOTION_EVENT_TOOL_TYPE_FINGER;
5551            mPointerGesture.currentGestureCoords[0].clear();
5552            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X,
5553                    mPointerGesture.referenceGestureX);
5554            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y,
5555                    mPointerGesture.referenceGestureY);
5556            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5557        } else if (mPointerGesture.currentGestureMode == PointerGesture::FREEFORM) {
5558            // FREEFORM mode.
5559#if DEBUG_GESTURES
5560            ALOGD("Gestures: FREEFORM activeTouchId=%d,"
5561                    "activeGestureId=%d, currentTouchPointerCount=%d",
5562                    activeTouchId, mPointerGesture.activeGestureId, currentFingerCount);
5563#endif
5564            ALOG_ASSERT(mPointerGesture.activeGestureId >= 0);
5565
5566            mPointerGesture.currentGestureIdBits.clear();
5567
5568            BitSet32 mappedTouchIdBits;
5569            BitSet32 usedGestureIdBits;
5570            if (mPointerGesture.lastGestureMode != PointerGesture::FREEFORM) {
5571                // Initially, assign the active gesture id to the active touch point
5572                // if there is one.  No other touch id bits are mapped yet.
5573                if (!*outCancelPreviousGesture) {
5574                    mappedTouchIdBits.markBit(activeTouchId);
5575                    usedGestureIdBits.markBit(mPointerGesture.activeGestureId);
5576                    mPointerGesture.freeformTouchToGestureIdMap[activeTouchId] =
5577                            mPointerGesture.activeGestureId;
5578                } else {
5579                    mPointerGesture.activeGestureId = -1;
5580                }
5581            } else {
5582                // Otherwise, assume we mapped all touches from the previous frame.
5583                // Reuse all mappings that are still applicable.
5584                mappedTouchIdBits.value = mLastCookedState.fingerIdBits.value
5585                        & mCurrentCookedState.fingerIdBits.value;
5586                usedGestureIdBits = mPointerGesture.lastGestureIdBits;
5587
5588                // Check whether we need to choose a new active gesture id because the
5589                // current went went up.
5590                for (BitSet32 upTouchIdBits(mLastCookedState.fingerIdBits.value
5591                        & ~mCurrentCookedState.fingerIdBits.value);
5592                        !upTouchIdBits.isEmpty(); ) {
5593                    uint32_t upTouchId = upTouchIdBits.clearFirstMarkedBit();
5594                    uint32_t upGestureId = mPointerGesture.freeformTouchToGestureIdMap[upTouchId];
5595                    if (upGestureId == uint32_t(mPointerGesture.activeGestureId)) {
5596                        mPointerGesture.activeGestureId = -1;
5597                        break;
5598                    }
5599                }
5600            }
5601
5602#if DEBUG_GESTURES
5603            ALOGD("Gestures: FREEFORM follow up "
5604                    "mappedTouchIdBits=0x%08x, usedGestureIdBits=0x%08x, "
5605                    "activeGestureId=%d",
5606                    mappedTouchIdBits.value, usedGestureIdBits.value,
5607                    mPointerGesture.activeGestureId);
5608#endif
5609
5610            BitSet32 idBits(mCurrentCookedState.fingerIdBits);
5611            for (uint32_t i = 0; i < currentFingerCount; i++) {
5612                uint32_t touchId = idBits.clearFirstMarkedBit();
5613                uint32_t gestureId;
5614                if (!mappedTouchIdBits.hasBit(touchId)) {
5615                    gestureId = usedGestureIdBits.markFirstUnmarkedBit();
5616                    mPointerGesture.freeformTouchToGestureIdMap[touchId] = gestureId;
5617#if DEBUG_GESTURES
5618                    ALOGD("Gestures: FREEFORM "
5619                            "new mapping for touch id %d -> gesture id %d",
5620                            touchId, gestureId);
5621#endif
5622                } else {
5623                    gestureId = mPointerGesture.freeformTouchToGestureIdMap[touchId];
5624#if DEBUG_GESTURES
5625                    ALOGD("Gestures: FREEFORM "
5626                            "existing mapping for touch id %d -> gesture id %d",
5627                            touchId, gestureId);
5628#endif
5629                }
5630                mPointerGesture.currentGestureIdBits.markBit(gestureId);
5631                mPointerGesture.currentGestureIdToIndex[gestureId] = i;
5632
5633                const RawPointerData::Pointer& pointer =
5634                        mCurrentRawState.rawPointerData.pointerForId(touchId);
5635                float deltaX = (pointer.x - mPointerGesture.referenceTouchX)
5636                        * mPointerXZoomScale;
5637                float deltaY = (pointer.y - mPointerGesture.referenceTouchY)
5638                        * mPointerYZoomScale;
5639                rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5640
5641                mPointerGesture.currentGestureProperties[i].clear();
5642                mPointerGesture.currentGestureProperties[i].id = gestureId;
5643                mPointerGesture.currentGestureProperties[i].toolType =
5644                        AMOTION_EVENT_TOOL_TYPE_FINGER;
5645                mPointerGesture.currentGestureCoords[i].clear();
5646                mPointerGesture.currentGestureCoords[i].setAxisValue(
5647                        AMOTION_EVENT_AXIS_X, mPointerGesture.referenceGestureX + deltaX);
5648                mPointerGesture.currentGestureCoords[i].setAxisValue(
5649                        AMOTION_EVENT_AXIS_Y, mPointerGesture.referenceGestureY + deltaY);
5650                mPointerGesture.currentGestureCoords[i].setAxisValue(
5651                        AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5652            }
5653
5654            if (mPointerGesture.activeGestureId < 0) {
5655                mPointerGesture.activeGestureId =
5656                        mPointerGesture.currentGestureIdBits.firstMarkedBit();
5657#if DEBUG_GESTURES
5658                ALOGD("Gestures: FREEFORM new "
5659                        "activeGestureId=%d", mPointerGesture.activeGestureId);
5660#endif
5661            }
5662        }
5663    }
5664
5665    mPointerController->setButtonState(mCurrentRawState.buttonState);
5666
5667#if DEBUG_GESTURES
5668    ALOGD("Gestures: finishPreviousGesture=%s, cancelPreviousGesture=%s, "
5669            "currentGestureMode=%d, currentGestureIdBits=0x%08x, "
5670            "lastGestureMode=%d, lastGestureIdBits=0x%08x",
5671            toString(*outFinishPreviousGesture), toString(*outCancelPreviousGesture),
5672            mPointerGesture.currentGestureMode, mPointerGesture.currentGestureIdBits.value,
5673            mPointerGesture.lastGestureMode, mPointerGesture.lastGestureIdBits.value);
5674    for (BitSet32 idBits = mPointerGesture.currentGestureIdBits; !idBits.isEmpty(); ) {
5675        uint32_t id = idBits.clearFirstMarkedBit();
5676        uint32_t index = mPointerGesture.currentGestureIdToIndex[id];
5677        const PointerProperties& properties = mPointerGesture.currentGestureProperties[index];
5678        const PointerCoords& coords = mPointerGesture.currentGestureCoords[index];
5679        ALOGD("  currentGesture[%d]: index=%d, toolType=%d, "
5680                "x=%0.3f, y=%0.3f, pressure=%0.3f",
5681                id, index, properties.toolType,
5682                coords.getAxisValue(AMOTION_EVENT_AXIS_X),
5683                coords.getAxisValue(AMOTION_EVENT_AXIS_Y),
5684                coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
5685    }
5686    for (BitSet32 idBits = mPointerGesture.lastGestureIdBits; !idBits.isEmpty(); ) {
5687        uint32_t id = idBits.clearFirstMarkedBit();
5688        uint32_t index = mPointerGesture.lastGestureIdToIndex[id];
5689        const PointerProperties& properties = mPointerGesture.lastGestureProperties[index];
5690        const PointerCoords& coords = mPointerGesture.lastGestureCoords[index];
5691        ALOGD("  lastGesture[%d]: index=%d, toolType=%d, "
5692                "x=%0.3f, y=%0.3f, pressure=%0.3f",
5693                id, index, properties.toolType,
5694                coords.getAxisValue(AMOTION_EVENT_AXIS_X),
5695                coords.getAxisValue(AMOTION_EVENT_AXIS_Y),
5696                coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
5697    }
5698#endif
5699    return true;
5700}
5701
5702void TouchInputMapper::dispatchPointerStylus(nsecs_t when, uint32_t policyFlags) {
5703    mPointerSimple.currentCoords.clear();
5704    mPointerSimple.currentProperties.clear();
5705
5706    bool down, hovering;
5707    if (!mCurrentCookedState.stylusIdBits.isEmpty()) {
5708        uint32_t id = mCurrentCookedState.stylusIdBits.firstMarkedBit();
5709        uint32_t index = mCurrentCookedState.cookedPointerData.idToIndex[id];
5710        float x = mCurrentCookedState.cookedPointerData.pointerCoords[index].getX();
5711        float y = mCurrentCookedState.cookedPointerData.pointerCoords[index].getY();
5712        mPointerController->setPosition(x, y);
5713
5714        hovering = mCurrentCookedState.cookedPointerData.hoveringIdBits.hasBit(id);
5715        down = !hovering;
5716
5717        mPointerController->getPosition(&x, &y);
5718        mPointerSimple.currentCoords.copyFrom(
5719                mCurrentCookedState.cookedPointerData.pointerCoords[index]);
5720        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
5721        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5722        mPointerSimple.currentProperties.id = 0;
5723        mPointerSimple.currentProperties.toolType =
5724                mCurrentCookedState.cookedPointerData.pointerProperties[index].toolType;
5725    } else {
5726        down = false;
5727        hovering = false;
5728    }
5729
5730    dispatchPointerSimple(when, policyFlags, down, hovering);
5731}
5732
5733void TouchInputMapper::abortPointerStylus(nsecs_t when, uint32_t policyFlags) {
5734    abortPointerSimple(when, policyFlags);
5735}
5736
5737void TouchInputMapper::dispatchPointerMouse(nsecs_t when, uint32_t policyFlags) {
5738    mPointerSimple.currentCoords.clear();
5739    mPointerSimple.currentProperties.clear();
5740
5741    bool down, hovering;
5742    if (!mCurrentCookedState.mouseIdBits.isEmpty()) {
5743        uint32_t id = mCurrentCookedState.mouseIdBits.firstMarkedBit();
5744        uint32_t currentIndex = mCurrentRawState.rawPointerData.idToIndex[id];
5745        if (mLastCookedState.mouseIdBits.hasBit(id)) {
5746            uint32_t lastIndex = mCurrentRawState.rawPointerData.idToIndex[id];
5747            float deltaX = (mCurrentRawState.rawPointerData.pointers[currentIndex].x
5748                    - mLastRawState.rawPointerData.pointers[lastIndex].x)
5749                    * mPointerXMovementScale;
5750            float deltaY = (mCurrentRawState.rawPointerData.pointers[currentIndex].y
5751                    - mLastRawState.rawPointerData.pointers[lastIndex].y)
5752                    * mPointerYMovementScale;
5753
5754            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5755            mPointerVelocityControl.move(when, &deltaX, &deltaY);
5756
5757            mPointerController->move(deltaX, deltaY);
5758        } else {
5759            mPointerVelocityControl.reset();
5760        }
5761
5762        down = isPointerDown(mCurrentRawState.buttonState);
5763        hovering = !down;
5764
5765        float x, y;
5766        mPointerController->getPosition(&x, &y);
5767        mPointerSimple.currentCoords.copyFrom(
5768                mCurrentCookedState.cookedPointerData.pointerCoords[currentIndex]);
5769        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
5770        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5771        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
5772                hovering ? 0.0f : 1.0f);
5773        mPointerSimple.currentProperties.id = 0;
5774        mPointerSimple.currentProperties.toolType =
5775                mCurrentCookedState.cookedPointerData.pointerProperties[currentIndex].toolType;
5776    } else {
5777        mPointerVelocityControl.reset();
5778
5779        down = false;
5780        hovering = false;
5781    }
5782
5783    dispatchPointerSimple(when, policyFlags, down, hovering);
5784}
5785
5786void TouchInputMapper::abortPointerMouse(nsecs_t when, uint32_t policyFlags) {
5787    abortPointerSimple(when, policyFlags);
5788
5789    mPointerVelocityControl.reset();
5790}
5791
5792void TouchInputMapper::dispatchPointerSimple(nsecs_t when, uint32_t policyFlags,
5793        bool down, bool hovering) {
5794    int32_t metaState = getContext()->getGlobalMetaState();
5795
5796    if (mPointerController != NULL) {
5797        if (down || hovering) {
5798            mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
5799            mPointerController->clearSpots();
5800            mPointerController->setButtonState(mCurrentRawState.buttonState);
5801            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
5802        } else if (!down && !hovering && (mPointerSimple.down || mPointerSimple.hovering)) {
5803            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
5804        }
5805    }
5806
5807    if (mPointerSimple.down && !down) {
5808        mPointerSimple.down = false;
5809
5810        // Send up.
5811        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5812                 AMOTION_EVENT_ACTION_UP, 0, metaState, mLastRawState.buttonState, 0,
5813                 mViewport.displayId,
5814                 1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
5815                 mOrientedXPrecision, mOrientedYPrecision,
5816                 mPointerSimple.downTime);
5817        getListener()->notifyMotion(&args);
5818    }
5819
5820    if (mPointerSimple.hovering && !hovering) {
5821        mPointerSimple.hovering = false;
5822
5823        // Send hover exit.
5824        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5825                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, metaState, mLastRawState.buttonState, 0,
5826                mViewport.displayId,
5827                1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
5828                mOrientedXPrecision, mOrientedYPrecision,
5829                mPointerSimple.downTime);
5830        getListener()->notifyMotion(&args);
5831    }
5832
5833    if (down) {
5834        if (!mPointerSimple.down) {
5835            mPointerSimple.down = true;
5836            mPointerSimple.downTime = when;
5837
5838            // Send down.
5839            NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5840                    AMOTION_EVENT_ACTION_DOWN, 0, metaState, mCurrentRawState.buttonState, 0,
5841                    mViewport.displayId,
5842                    1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
5843                    mOrientedXPrecision, mOrientedYPrecision,
5844                    mPointerSimple.downTime);
5845            getListener()->notifyMotion(&args);
5846        }
5847
5848        // Send move.
5849        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5850                AMOTION_EVENT_ACTION_MOVE, 0, metaState, mCurrentRawState.buttonState, 0,
5851                mViewport.displayId,
5852                1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
5853                mOrientedXPrecision, mOrientedYPrecision,
5854                mPointerSimple.downTime);
5855        getListener()->notifyMotion(&args);
5856    }
5857
5858    if (hovering) {
5859        if (!mPointerSimple.hovering) {
5860            mPointerSimple.hovering = true;
5861
5862            // Send hover enter.
5863            NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5864                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, metaState,
5865                    mCurrentRawState.buttonState, 0,
5866                    mViewport.displayId,
5867                    1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
5868                    mOrientedXPrecision, mOrientedYPrecision,
5869                    mPointerSimple.downTime);
5870            getListener()->notifyMotion(&args);
5871        }
5872
5873        // Send hover move.
5874        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5875                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, metaState,
5876                mCurrentRawState.buttonState, 0,
5877                mViewport.displayId,
5878                1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
5879                mOrientedXPrecision, mOrientedYPrecision,
5880                mPointerSimple.downTime);
5881        getListener()->notifyMotion(&args);
5882    }
5883
5884    if (mCurrentRawState.rawVScroll || mCurrentRawState.rawHScroll) {
5885        float vscroll = mCurrentRawState.rawVScroll;
5886        float hscroll = mCurrentRawState.rawHScroll;
5887        mWheelYVelocityControl.move(when, NULL, &vscroll);
5888        mWheelXVelocityControl.move(when, &hscroll, NULL);
5889
5890        // Send scroll.
5891        PointerCoords pointerCoords;
5892        pointerCoords.copyFrom(mPointerSimple.currentCoords);
5893        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
5894        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
5895
5896        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5897                AMOTION_EVENT_ACTION_SCROLL, 0, metaState, mCurrentRawState.buttonState, 0,
5898                mViewport.displayId,
5899                1, &mPointerSimple.currentProperties, &pointerCoords,
5900                mOrientedXPrecision, mOrientedYPrecision,
5901                mPointerSimple.downTime);
5902        getListener()->notifyMotion(&args);
5903    }
5904
5905    // Save state.
5906    if (down || hovering) {
5907        mPointerSimple.lastCoords.copyFrom(mPointerSimple.currentCoords);
5908        mPointerSimple.lastProperties.copyFrom(mPointerSimple.currentProperties);
5909    } else {
5910        mPointerSimple.reset();
5911    }
5912}
5913
5914void TouchInputMapper::abortPointerSimple(nsecs_t when, uint32_t policyFlags) {
5915    mPointerSimple.currentCoords.clear();
5916    mPointerSimple.currentProperties.clear();
5917
5918    dispatchPointerSimple(when, policyFlags, false, false);
5919}
5920
5921void TouchInputMapper::dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
5922        int32_t action, int32_t flags, int32_t metaState, int32_t buttonState, int32_t edgeFlags,
5923        const PointerProperties* properties, const PointerCoords* coords,
5924        const uint32_t* idToIndex, BitSet32 idBits,
5925        int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime) {
5926    PointerCoords pointerCoords[MAX_POINTERS];
5927    PointerProperties pointerProperties[MAX_POINTERS];
5928    uint32_t pointerCount = 0;
5929    while (!idBits.isEmpty()) {
5930        uint32_t id = idBits.clearFirstMarkedBit();
5931        uint32_t index = idToIndex[id];
5932        pointerProperties[pointerCount].copyFrom(properties[index]);
5933        pointerCoords[pointerCount].copyFrom(coords[index]);
5934
5935        if (changedId >= 0 && id == uint32_t(changedId)) {
5936            action |= pointerCount << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
5937        }
5938
5939        pointerCount += 1;
5940    }
5941
5942    ALOG_ASSERT(pointerCount != 0);
5943
5944    if (changedId >= 0 && pointerCount == 1) {
5945        // Replace initial down and final up action.
5946        // We can compare the action without masking off the changed pointer index
5947        // because we know the index is 0.
5948        if (action == AMOTION_EVENT_ACTION_POINTER_DOWN) {
5949            action = AMOTION_EVENT_ACTION_DOWN;
5950        } else if (action == AMOTION_EVENT_ACTION_POINTER_UP) {
5951            action = AMOTION_EVENT_ACTION_UP;
5952        } else {
5953            // Can't happen.
5954            ALOG_ASSERT(false);
5955        }
5956    }
5957
5958    NotifyMotionArgs args(when, getDeviceId(), source, policyFlags,
5959            action, flags, metaState, buttonState, edgeFlags,
5960            mViewport.displayId, pointerCount, pointerProperties, pointerCoords,
5961            xPrecision, yPrecision, downTime);
5962    getListener()->notifyMotion(&args);
5963}
5964
5965bool TouchInputMapper::updateMovedPointers(const PointerProperties* inProperties,
5966        const PointerCoords* inCoords, const uint32_t* inIdToIndex,
5967        PointerProperties* outProperties, PointerCoords* outCoords, const uint32_t* outIdToIndex,
5968        BitSet32 idBits) const {
5969    bool changed = false;
5970    while (!idBits.isEmpty()) {
5971        uint32_t id = idBits.clearFirstMarkedBit();
5972        uint32_t inIndex = inIdToIndex[id];
5973        uint32_t outIndex = outIdToIndex[id];
5974
5975        const PointerProperties& curInProperties = inProperties[inIndex];
5976        const PointerCoords& curInCoords = inCoords[inIndex];
5977        PointerProperties& curOutProperties = outProperties[outIndex];
5978        PointerCoords& curOutCoords = outCoords[outIndex];
5979
5980        if (curInProperties != curOutProperties) {
5981            curOutProperties.copyFrom(curInProperties);
5982            changed = true;
5983        }
5984
5985        if (curInCoords != curOutCoords) {
5986            curOutCoords.copyFrom(curInCoords);
5987            changed = true;
5988        }
5989    }
5990    return changed;
5991}
5992
5993void TouchInputMapper::fadePointer() {
5994    if (mPointerController != NULL) {
5995        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
5996    }
5997}
5998
5999void TouchInputMapper::cancelTouch(nsecs_t when) {
6000    abortPointerUsage(when, 0 /*policyFlags*/);
6001}
6002
6003bool TouchInputMapper::isPointInsideSurface(int32_t x, int32_t y) {
6004    return x >= mRawPointerAxes.x.minValue && x <= mRawPointerAxes.x.maxValue
6005            && y >= mRawPointerAxes.y.minValue && y <= mRawPointerAxes.y.maxValue;
6006}
6007
6008const TouchInputMapper::VirtualKey* TouchInputMapper::findVirtualKeyHit(
6009        int32_t x, int32_t y) {
6010    size_t numVirtualKeys = mVirtualKeys.size();
6011    for (size_t i = 0; i < numVirtualKeys; i++) {
6012        const VirtualKey& virtualKey = mVirtualKeys[i];
6013
6014#if DEBUG_VIRTUAL_KEYS
6015        ALOGD("VirtualKeys: Hit test (%d, %d): keyCode=%d, scanCode=%d, "
6016                "left=%d, top=%d, right=%d, bottom=%d",
6017                x, y,
6018                virtualKey.keyCode, virtualKey.scanCode,
6019                virtualKey.hitLeft, virtualKey.hitTop,
6020                virtualKey.hitRight, virtualKey.hitBottom);
6021#endif
6022
6023        if (virtualKey.isHit(x, y)) {
6024            return & virtualKey;
6025        }
6026    }
6027
6028    return NULL;
6029}
6030
6031void TouchInputMapper::assignPointerIds(const RawState* last, RawState* current) {
6032    uint32_t currentPointerCount = current->rawPointerData.pointerCount;
6033    uint32_t lastPointerCount = last->rawPointerData.pointerCount;
6034
6035    current->rawPointerData.clearIdBits();
6036
6037    if (currentPointerCount == 0) {
6038        // No pointers to assign.
6039        return;
6040    }
6041
6042    if (lastPointerCount == 0) {
6043        // All pointers are new.
6044        for (uint32_t i = 0; i < currentPointerCount; i++) {
6045            uint32_t id = i;
6046            current->rawPointerData.pointers[i].id = id;
6047            current->rawPointerData.idToIndex[id] = i;
6048            current->rawPointerData.markIdBit(id, current->rawPointerData.isHovering(i));
6049        }
6050        return;
6051    }
6052
6053    if (currentPointerCount == 1 && lastPointerCount == 1
6054            && current->rawPointerData.pointers[0].toolType
6055                    == last->rawPointerData.pointers[0].toolType) {
6056        // Only one pointer and no change in count so it must have the same id as before.
6057        uint32_t id = last->rawPointerData.pointers[0].id;
6058        current->rawPointerData.pointers[0].id = id;
6059        current->rawPointerData.idToIndex[id] = 0;
6060        current->rawPointerData.markIdBit(id, current->rawPointerData.isHovering(0));
6061        return;
6062    }
6063
6064    // General case.
6065    // We build a heap of squared euclidean distances between current and last pointers
6066    // associated with the current and last pointer indices.  Then, we find the best
6067    // match (by distance) for each current pointer.
6068    // The pointers must have the same tool type but it is possible for them to
6069    // transition from hovering to touching or vice-versa while retaining the same id.
6070    PointerDistanceHeapElement heap[MAX_POINTERS * MAX_POINTERS];
6071
6072    uint32_t heapSize = 0;
6073    for (uint32_t currentPointerIndex = 0; currentPointerIndex < currentPointerCount;
6074            currentPointerIndex++) {
6075        for (uint32_t lastPointerIndex = 0; lastPointerIndex < lastPointerCount;
6076                lastPointerIndex++) {
6077            const RawPointerData::Pointer& currentPointer =
6078                    current->rawPointerData.pointers[currentPointerIndex];
6079            const RawPointerData::Pointer& lastPointer =
6080                    last->rawPointerData.pointers[lastPointerIndex];
6081            if (currentPointer.toolType == lastPointer.toolType) {
6082                int64_t deltaX = currentPointer.x - lastPointer.x;
6083                int64_t deltaY = currentPointer.y - lastPointer.y;
6084
6085                uint64_t distance = uint64_t(deltaX * deltaX + deltaY * deltaY);
6086
6087                // Insert new element into the heap (sift up).
6088                heap[heapSize].currentPointerIndex = currentPointerIndex;
6089                heap[heapSize].lastPointerIndex = lastPointerIndex;
6090                heap[heapSize].distance = distance;
6091                heapSize += 1;
6092            }
6093        }
6094    }
6095
6096    // Heapify
6097    for (uint32_t startIndex = heapSize / 2; startIndex != 0; ) {
6098        startIndex -= 1;
6099        for (uint32_t parentIndex = startIndex; ;) {
6100            uint32_t childIndex = parentIndex * 2 + 1;
6101            if (childIndex >= heapSize) {
6102                break;
6103            }
6104
6105            if (childIndex + 1 < heapSize
6106                    && heap[childIndex + 1].distance < heap[childIndex].distance) {
6107                childIndex += 1;
6108            }
6109
6110            if (heap[parentIndex].distance <= heap[childIndex].distance) {
6111                break;
6112            }
6113
6114            swap(heap[parentIndex], heap[childIndex]);
6115            parentIndex = childIndex;
6116        }
6117    }
6118
6119#if DEBUG_POINTER_ASSIGNMENT
6120    ALOGD("assignPointerIds - initial distance min-heap: size=%d", heapSize);
6121    for (size_t i = 0; i < heapSize; i++) {
6122        ALOGD("  heap[%d]: cur=%d, last=%d, distance=%lld",
6123                i, heap[i].currentPointerIndex, heap[i].lastPointerIndex,
6124                heap[i].distance);
6125    }
6126#endif
6127
6128    // Pull matches out by increasing order of distance.
6129    // To avoid reassigning pointers that have already been matched, the loop keeps track
6130    // of which last and current pointers have been matched using the matchedXXXBits variables.
6131    // It also tracks the used pointer id bits.
6132    BitSet32 matchedLastBits(0);
6133    BitSet32 matchedCurrentBits(0);
6134    BitSet32 usedIdBits(0);
6135    bool first = true;
6136    for (uint32_t i = min(currentPointerCount, lastPointerCount); heapSize > 0 && i > 0; i--) {
6137        while (heapSize > 0) {
6138            if (first) {
6139                // The first time through the loop, we just consume the root element of
6140                // the heap (the one with smallest distance).
6141                first = false;
6142            } else {
6143                // Previous iterations consumed the root element of the heap.
6144                // Pop root element off of the heap (sift down).
6145                heap[0] = heap[heapSize];
6146                for (uint32_t parentIndex = 0; ;) {
6147                    uint32_t childIndex = parentIndex * 2 + 1;
6148                    if (childIndex >= heapSize) {
6149                        break;
6150                    }
6151
6152                    if (childIndex + 1 < heapSize
6153                            && heap[childIndex + 1].distance < heap[childIndex].distance) {
6154                        childIndex += 1;
6155                    }
6156
6157                    if (heap[parentIndex].distance <= heap[childIndex].distance) {
6158                        break;
6159                    }
6160
6161                    swap(heap[parentIndex], heap[childIndex]);
6162                    parentIndex = childIndex;
6163                }
6164
6165#if DEBUG_POINTER_ASSIGNMENT
6166                ALOGD("assignPointerIds - reduced distance min-heap: size=%d", heapSize);
6167                for (size_t i = 0; i < heapSize; i++) {
6168                    ALOGD("  heap[%d]: cur=%d, last=%d, distance=%lld",
6169                            i, heap[i].currentPointerIndex, heap[i].lastPointerIndex,
6170                            heap[i].distance);
6171                }
6172#endif
6173            }
6174
6175            heapSize -= 1;
6176
6177            uint32_t currentPointerIndex = heap[0].currentPointerIndex;
6178            if (matchedCurrentBits.hasBit(currentPointerIndex)) continue; // already matched
6179
6180            uint32_t lastPointerIndex = heap[0].lastPointerIndex;
6181            if (matchedLastBits.hasBit(lastPointerIndex)) continue; // already matched
6182
6183            matchedCurrentBits.markBit(currentPointerIndex);
6184            matchedLastBits.markBit(lastPointerIndex);
6185
6186            uint32_t id = last->rawPointerData.pointers[lastPointerIndex].id;
6187            current->rawPointerData.pointers[currentPointerIndex].id = id;
6188            current->rawPointerData.idToIndex[id] = currentPointerIndex;
6189            current->rawPointerData.markIdBit(id,
6190                    current->rawPointerData.isHovering(currentPointerIndex));
6191            usedIdBits.markBit(id);
6192
6193#if DEBUG_POINTER_ASSIGNMENT
6194            ALOGD("assignPointerIds - matched: cur=%d, last=%d, id=%d, distance=%lld",
6195                    lastPointerIndex, currentPointerIndex, id, heap[0].distance);
6196#endif
6197            break;
6198        }
6199    }
6200
6201    // Assign fresh ids to pointers that were not matched in the process.
6202    for (uint32_t i = currentPointerCount - matchedCurrentBits.count(); i != 0; i--) {
6203        uint32_t currentPointerIndex = matchedCurrentBits.markFirstUnmarkedBit();
6204        uint32_t id = usedIdBits.markFirstUnmarkedBit();
6205
6206        current->rawPointerData.pointers[currentPointerIndex].id = id;
6207        current->rawPointerData.idToIndex[id] = currentPointerIndex;
6208        current->rawPointerData.markIdBit(id,
6209                current->rawPointerData.isHovering(currentPointerIndex));
6210
6211#if DEBUG_POINTER_ASSIGNMENT
6212        ALOGD("assignPointerIds - assigned: cur=%d, id=%d",
6213                currentPointerIndex, id);
6214#endif
6215    }
6216}
6217
6218int32_t TouchInputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
6219    if (mCurrentVirtualKey.down && mCurrentVirtualKey.keyCode == keyCode) {
6220        return AKEY_STATE_VIRTUAL;
6221    }
6222
6223    size_t numVirtualKeys = mVirtualKeys.size();
6224    for (size_t i = 0; i < numVirtualKeys; i++) {
6225        const VirtualKey& virtualKey = mVirtualKeys[i];
6226        if (virtualKey.keyCode == keyCode) {
6227            return AKEY_STATE_UP;
6228        }
6229    }
6230
6231    return AKEY_STATE_UNKNOWN;
6232}
6233
6234int32_t TouchInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
6235    if (mCurrentVirtualKey.down && mCurrentVirtualKey.scanCode == scanCode) {
6236        return AKEY_STATE_VIRTUAL;
6237    }
6238
6239    size_t numVirtualKeys = mVirtualKeys.size();
6240    for (size_t i = 0; i < numVirtualKeys; i++) {
6241        const VirtualKey& virtualKey = mVirtualKeys[i];
6242        if (virtualKey.scanCode == scanCode) {
6243            return AKEY_STATE_UP;
6244        }
6245    }
6246
6247    return AKEY_STATE_UNKNOWN;
6248}
6249
6250bool TouchInputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
6251        const int32_t* keyCodes, uint8_t* outFlags) {
6252    size_t numVirtualKeys = mVirtualKeys.size();
6253    for (size_t i = 0; i < numVirtualKeys; i++) {
6254        const VirtualKey& virtualKey = mVirtualKeys[i];
6255
6256        for (size_t i = 0; i < numCodes; i++) {
6257            if (virtualKey.keyCode == keyCodes[i]) {
6258                outFlags[i] = 1;
6259            }
6260        }
6261    }
6262
6263    return true;
6264}
6265
6266
6267// --- SingleTouchInputMapper ---
6268
6269SingleTouchInputMapper::SingleTouchInputMapper(InputDevice* device) :
6270        TouchInputMapper(device) {
6271}
6272
6273SingleTouchInputMapper::~SingleTouchInputMapper() {
6274}
6275
6276void SingleTouchInputMapper::reset(nsecs_t when) {
6277    mSingleTouchMotionAccumulator.reset(getDevice());
6278
6279    TouchInputMapper::reset(when);
6280}
6281
6282void SingleTouchInputMapper::process(const RawEvent* rawEvent) {
6283    TouchInputMapper::process(rawEvent);
6284
6285    mSingleTouchMotionAccumulator.process(rawEvent);
6286}
6287
6288void SingleTouchInputMapper::syncTouch(nsecs_t when, RawState* outState) {
6289    if (mTouchButtonAccumulator.isToolActive()) {
6290        outState->rawPointerData.pointerCount = 1;
6291        outState->rawPointerData.idToIndex[0] = 0;
6292
6293        bool isHovering = mTouchButtonAccumulator.getToolType() != AMOTION_EVENT_TOOL_TYPE_MOUSE
6294                && (mTouchButtonAccumulator.isHovering()
6295                        || (mRawPointerAxes.pressure.valid
6296                                && mSingleTouchMotionAccumulator.getAbsolutePressure() <= 0));
6297        outState->rawPointerData.markIdBit(0, isHovering);
6298
6299        RawPointerData::Pointer& outPointer = outState->rawPointerData.pointers[0];
6300        outPointer.id = 0;
6301        outPointer.x = mSingleTouchMotionAccumulator.getAbsoluteX();
6302        outPointer.y = mSingleTouchMotionAccumulator.getAbsoluteY();
6303        outPointer.pressure = mSingleTouchMotionAccumulator.getAbsolutePressure();
6304        outPointer.touchMajor = 0;
6305        outPointer.touchMinor = 0;
6306        outPointer.toolMajor = mSingleTouchMotionAccumulator.getAbsoluteToolWidth();
6307        outPointer.toolMinor = mSingleTouchMotionAccumulator.getAbsoluteToolWidth();
6308        outPointer.orientation = 0;
6309        outPointer.distance = mSingleTouchMotionAccumulator.getAbsoluteDistance();
6310        outPointer.tiltX = mSingleTouchMotionAccumulator.getAbsoluteTiltX();
6311        outPointer.tiltY = mSingleTouchMotionAccumulator.getAbsoluteTiltY();
6312        outPointer.toolType = mTouchButtonAccumulator.getToolType();
6313        if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6314            outPointer.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
6315        }
6316        outPointer.isHovering = isHovering;
6317    }
6318}
6319
6320void SingleTouchInputMapper::configureRawPointerAxes() {
6321    TouchInputMapper::configureRawPointerAxes();
6322
6323    getAbsoluteAxisInfo(ABS_X, &mRawPointerAxes.x);
6324    getAbsoluteAxisInfo(ABS_Y, &mRawPointerAxes.y);
6325    getAbsoluteAxisInfo(ABS_PRESSURE, &mRawPointerAxes.pressure);
6326    getAbsoluteAxisInfo(ABS_TOOL_WIDTH, &mRawPointerAxes.toolMajor);
6327    getAbsoluteAxisInfo(ABS_DISTANCE, &mRawPointerAxes.distance);
6328    getAbsoluteAxisInfo(ABS_TILT_X, &mRawPointerAxes.tiltX);
6329    getAbsoluteAxisInfo(ABS_TILT_Y, &mRawPointerAxes.tiltY);
6330}
6331
6332bool SingleTouchInputMapper::hasStylus() const {
6333    return mTouchButtonAccumulator.hasStylus();
6334}
6335
6336
6337// --- MultiTouchInputMapper ---
6338
6339MultiTouchInputMapper::MultiTouchInputMapper(InputDevice* device) :
6340        TouchInputMapper(device) {
6341}
6342
6343MultiTouchInputMapper::~MultiTouchInputMapper() {
6344}
6345
6346void MultiTouchInputMapper::reset(nsecs_t when) {
6347    mMultiTouchMotionAccumulator.reset(getDevice());
6348
6349    mPointerIdBits.clear();
6350
6351    TouchInputMapper::reset(when);
6352}
6353
6354void MultiTouchInputMapper::process(const RawEvent* rawEvent) {
6355    TouchInputMapper::process(rawEvent);
6356
6357    mMultiTouchMotionAccumulator.process(rawEvent);
6358}
6359
6360void MultiTouchInputMapper::syncTouch(nsecs_t when, RawState* outState) {
6361    size_t inCount = mMultiTouchMotionAccumulator.getSlotCount();
6362    size_t outCount = 0;
6363    BitSet32 newPointerIdBits;
6364
6365    for (size_t inIndex = 0; inIndex < inCount; inIndex++) {
6366        const MultiTouchMotionAccumulator::Slot* inSlot =
6367                mMultiTouchMotionAccumulator.getSlot(inIndex);
6368        if (!inSlot->isInUse()) {
6369            continue;
6370        }
6371
6372        if (outCount >= MAX_POINTERS) {
6373#if DEBUG_POINTERS
6374            ALOGD("MultiTouch device %s emitted more than maximum of %d pointers; "
6375                    "ignoring the rest.",
6376                    getDeviceName().string(), MAX_POINTERS);
6377#endif
6378            break; // too many fingers!
6379        }
6380
6381        RawPointerData::Pointer& outPointer = outState->rawPointerData.pointers[outCount];
6382        outPointer.x = inSlot->getX();
6383        outPointer.y = inSlot->getY();
6384        outPointer.pressure = inSlot->getPressure();
6385        outPointer.touchMajor = inSlot->getTouchMajor();
6386        outPointer.touchMinor = inSlot->getTouchMinor();
6387        outPointer.toolMajor = inSlot->getToolMajor();
6388        outPointer.toolMinor = inSlot->getToolMinor();
6389        outPointer.orientation = inSlot->getOrientation();
6390        outPointer.distance = inSlot->getDistance();
6391        outPointer.tiltX = 0;
6392        outPointer.tiltY = 0;
6393
6394        outPointer.toolType = inSlot->getToolType();
6395        if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6396            outPointer.toolType = mTouchButtonAccumulator.getToolType();
6397            if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6398                outPointer.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
6399            }
6400        }
6401
6402        bool isHovering = mTouchButtonAccumulator.getToolType() != AMOTION_EVENT_TOOL_TYPE_MOUSE
6403                && (mTouchButtonAccumulator.isHovering()
6404                        || (mRawPointerAxes.pressure.valid && inSlot->getPressure() <= 0));
6405        outPointer.isHovering = isHovering;
6406
6407        // Assign pointer id using tracking id if available.
6408        mHavePointerIds = true;
6409        int32_t trackingId = inSlot->getTrackingId();
6410        int32_t id = -1;
6411        if (trackingId >= 0) {
6412            for (BitSet32 idBits(mPointerIdBits); !idBits.isEmpty(); ) {
6413                uint32_t n = idBits.clearFirstMarkedBit();
6414                if (mPointerTrackingIdMap[n] == trackingId) {
6415                    id = n;
6416                }
6417            }
6418
6419            if (id < 0 && !mPointerIdBits.isFull()) {
6420                id = mPointerIdBits.markFirstUnmarkedBit();
6421                mPointerTrackingIdMap[id] = trackingId;
6422            }
6423        }
6424        if (id < 0) {
6425            mHavePointerIds = false;
6426            outState->rawPointerData.clearIdBits();
6427            newPointerIdBits.clear();
6428        } else {
6429            outPointer.id = id;
6430            outState->rawPointerData.idToIndex[id] = outCount;
6431            outState->rawPointerData.markIdBit(id, isHovering);
6432            newPointerIdBits.markBit(id);
6433        }
6434
6435        outCount += 1;
6436    }
6437
6438    outState->rawPointerData.pointerCount = outCount;
6439    mPointerIdBits = newPointerIdBits;
6440
6441    mMultiTouchMotionAccumulator.finishSync();
6442}
6443
6444void MultiTouchInputMapper::configureRawPointerAxes() {
6445    TouchInputMapper::configureRawPointerAxes();
6446
6447    getAbsoluteAxisInfo(ABS_MT_POSITION_X, &mRawPointerAxes.x);
6448    getAbsoluteAxisInfo(ABS_MT_POSITION_Y, &mRawPointerAxes.y);
6449    getAbsoluteAxisInfo(ABS_MT_TOUCH_MAJOR, &mRawPointerAxes.touchMajor);
6450    getAbsoluteAxisInfo(ABS_MT_TOUCH_MINOR, &mRawPointerAxes.touchMinor);
6451    getAbsoluteAxisInfo(ABS_MT_WIDTH_MAJOR, &mRawPointerAxes.toolMajor);
6452    getAbsoluteAxisInfo(ABS_MT_WIDTH_MINOR, &mRawPointerAxes.toolMinor);
6453    getAbsoluteAxisInfo(ABS_MT_ORIENTATION, &mRawPointerAxes.orientation);
6454    getAbsoluteAxisInfo(ABS_MT_PRESSURE, &mRawPointerAxes.pressure);
6455    getAbsoluteAxisInfo(ABS_MT_DISTANCE, &mRawPointerAxes.distance);
6456    getAbsoluteAxisInfo(ABS_MT_TRACKING_ID, &mRawPointerAxes.trackingId);
6457    getAbsoluteAxisInfo(ABS_MT_SLOT, &mRawPointerAxes.slot);
6458
6459    if (mRawPointerAxes.trackingId.valid
6460            && mRawPointerAxes.slot.valid
6461            && mRawPointerAxes.slot.minValue == 0 && mRawPointerAxes.slot.maxValue > 0) {
6462        size_t slotCount = mRawPointerAxes.slot.maxValue + 1;
6463        if (slotCount > MAX_SLOTS) {
6464            ALOGW("MultiTouch Device %s reported %zu slots but the framework "
6465                    "only supports a maximum of %zu slots at this time.",
6466                    getDeviceName().string(), slotCount, MAX_SLOTS);
6467            slotCount = MAX_SLOTS;
6468        }
6469        mMultiTouchMotionAccumulator.configure(getDevice(),
6470                slotCount, true /*usingSlotsProtocol*/);
6471    } else {
6472        mMultiTouchMotionAccumulator.configure(getDevice(),
6473                MAX_POINTERS, false /*usingSlotsProtocol*/);
6474    }
6475}
6476
6477bool MultiTouchInputMapper::hasStylus() const {
6478    return mMultiTouchMotionAccumulator.hasStylus()
6479            || mTouchButtonAccumulator.hasStylus();
6480}
6481
6482// --- ExternalStylusInputMapper
6483
6484ExternalStylusInputMapper::ExternalStylusInputMapper(InputDevice* device) :
6485    InputMapper(device) {
6486
6487}
6488
6489uint32_t ExternalStylusInputMapper::getSources() {
6490    return AINPUT_SOURCE_STYLUS;
6491}
6492
6493void ExternalStylusInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
6494    InputMapper::populateDeviceInfo(info);
6495    info->addMotionRange(AMOTION_EVENT_AXIS_PRESSURE, AINPUT_SOURCE_STYLUS,
6496            0.0f, 1.0f, 0.0f, 0.0f, 0.0f);
6497}
6498
6499void ExternalStylusInputMapper::dump(String8& dump) {
6500    dump.append(INDENT2 "External Stylus Input Mapper:\n");
6501    dump.append(INDENT3 "Raw Stylus Axes:\n");
6502    dumpRawAbsoluteAxisInfo(dump, mRawPressureAxis, "Pressure");
6503    dump.append(INDENT3 "Stylus State:\n");
6504    dumpStylusState(dump, mStylusState);
6505}
6506
6507void ExternalStylusInputMapper::configure(nsecs_t when,
6508        const InputReaderConfiguration* config, uint32_t changes) {
6509    getAbsoluteAxisInfo(ABS_PRESSURE, &mRawPressureAxis);
6510    mTouchButtonAccumulator.configure(getDevice());
6511}
6512
6513void ExternalStylusInputMapper::reset(nsecs_t when) {
6514    InputDevice* device = getDevice();
6515    mSingleTouchMotionAccumulator.reset(device);
6516    mTouchButtonAccumulator.reset(device);
6517    InputMapper::reset(when);
6518}
6519
6520void ExternalStylusInputMapper::process(const RawEvent* rawEvent) {
6521    mSingleTouchMotionAccumulator.process(rawEvent);
6522    mTouchButtonAccumulator.process(rawEvent);
6523
6524    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
6525        sync(rawEvent->when);
6526    }
6527}
6528
6529void ExternalStylusInputMapper::sync(nsecs_t when) {
6530    mStylusState.clear();
6531
6532    mStylusState.when = when;
6533
6534    mStylusState.toolType = mTouchButtonAccumulator.getToolType();
6535    if (mStylusState.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6536        mStylusState.toolType = AMOTION_EVENT_TOOL_TYPE_STYLUS;
6537    }
6538
6539    int32_t pressure = mSingleTouchMotionAccumulator.getAbsolutePressure();
6540    if (mRawPressureAxis.valid) {
6541        mStylusState.pressure = float(pressure) / mRawPressureAxis.maxValue;
6542    } else if (mTouchButtonAccumulator.isToolActive()) {
6543        mStylusState.pressure = 1.0f;
6544    } else {
6545        mStylusState.pressure = 0.0f;
6546    }
6547
6548    mStylusState.buttons = mTouchButtonAccumulator.getButtonState();
6549
6550    mContext->dispatchExternalStylusState(mStylusState);
6551}
6552
6553
6554// --- JoystickInputMapper ---
6555
6556JoystickInputMapper::JoystickInputMapper(InputDevice* device) :
6557        InputMapper(device) {
6558}
6559
6560JoystickInputMapper::~JoystickInputMapper() {
6561}
6562
6563uint32_t JoystickInputMapper::getSources() {
6564    return AINPUT_SOURCE_JOYSTICK;
6565}
6566
6567void JoystickInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
6568    InputMapper::populateDeviceInfo(info);
6569
6570    for (size_t i = 0; i < mAxes.size(); i++) {
6571        const Axis& axis = mAxes.valueAt(i);
6572        addMotionRange(axis.axisInfo.axis, axis, info);
6573
6574        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
6575            addMotionRange(axis.axisInfo.highAxis, axis, info);
6576
6577        }
6578    }
6579}
6580
6581void JoystickInputMapper::addMotionRange(int32_t axisId, const Axis& axis,
6582        InputDeviceInfo* info) {
6583    info->addMotionRange(axisId, AINPUT_SOURCE_JOYSTICK,
6584            axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
6585    /* In order to ease the transition for developers from using the old axes
6586     * to the newer, more semantically correct axes, we'll continue to register
6587     * the old axes as duplicates of their corresponding new ones.  */
6588    int32_t compatAxis = getCompatAxis(axisId);
6589    if (compatAxis >= 0) {
6590        info->addMotionRange(compatAxis, AINPUT_SOURCE_JOYSTICK,
6591                axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
6592    }
6593}
6594
6595/* A mapping from axes the joystick actually has to the axes that should be
6596 * artificially created for compatibility purposes.
6597 * Returns -1 if no compatibility axis is needed. */
6598int32_t JoystickInputMapper::getCompatAxis(int32_t axis) {
6599    switch(axis) {
6600    case AMOTION_EVENT_AXIS_LTRIGGER:
6601        return AMOTION_EVENT_AXIS_BRAKE;
6602    case AMOTION_EVENT_AXIS_RTRIGGER:
6603        return AMOTION_EVENT_AXIS_GAS;
6604    }
6605    return -1;
6606}
6607
6608void JoystickInputMapper::dump(String8& dump) {
6609    dump.append(INDENT2 "Joystick Input Mapper:\n");
6610
6611    dump.append(INDENT3 "Axes:\n");
6612    size_t numAxes = mAxes.size();
6613    for (size_t i = 0; i < numAxes; i++) {
6614        const Axis& axis = mAxes.valueAt(i);
6615        const char* label = getAxisLabel(axis.axisInfo.axis);
6616        if (label) {
6617            dump.appendFormat(INDENT4 "%s", label);
6618        } else {
6619            dump.appendFormat(INDENT4 "%d", axis.axisInfo.axis);
6620        }
6621        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
6622            label = getAxisLabel(axis.axisInfo.highAxis);
6623            if (label) {
6624                dump.appendFormat(" / %s (split at %d)", label, axis.axisInfo.splitValue);
6625            } else {
6626                dump.appendFormat(" / %d (split at %d)", axis.axisInfo.highAxis,
6627                        axis.axisInfo.splitValue);
6628            }
6629        } else if (axis.axisInfo.mode == AxisInfo::MODE_INVERT) {
6630            dump.append(" (invert)");
6631        }
6632
6633        dump.appendFormat(": min=%0.5f, max=%0.5f, flat=%0.5f, fuzz=%0.5f, resolution=%0.5f\n",
6634                axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
6635        dump.appendFormat(INDENT4 "  scale=%0.5f, offset=%0.5f, "
6636                "highScale=%0.5f, highOffset=%0.5f\n",
6637                axis.scale, axis.offset, axis.highScale, axis.highOffset);
6638        dump.appendFormat(INDENT4 "  rawAxis=%d, rawMin=%d, rawMax=%d, "
6639                "rawFlat=%d, rawFuzz=%d, rawResolution=%d\n",
6640                mAxes.keyAt(i), axis.rawAxisInfo.minValue, axis.rawAxisInfo.maxValue,
6641                axis.rawAxisInfo.flat, axis.rawAxisInfo.fuzz, axis.rawAxisInfo.resolution);
6642    }
6643}
6644
6645void JoystickInputMapper::configure(nsecs_t when,
6646        const InputReaderConfiguration* config, uint32_t changes) {
6647    InputMapper::configure(when, config, changes);
6648
6649    if (!changes) { // first time only
6650        // Collect all axes.
6651        for (int32_t abs = 0; abs <= ABS_MAX; abs++) {
6652            if (!(getAbsAxisUsage(abs, getDevice()->getClasses())
6653                    & INPUT_DEVICE_CLASS_JOYSTICK)) {
6654                continue; // axis must be claimed by a different device
6655            }
6656
6657            RawAbsoluteAxisInfo rawAxisInfo;
6658            getAbsoluteAxisInfo(abs, &rawAxisInfo);
6659            if (rawAxisInfo.valid) {
6660                // Map axis.
6661                AxisInfo axisInfo;
6662                bool explicitlyMapped = !getEventHub()->mapAxis(getDeviceId(), abs, &axisInfo);
6663                if (!explicitlyMapped) {
6664                    // Axis is not explicitly mapped, will choose a generic axis later.
6665                    axisInfo.mode = AxisInfo::MODE_NORMAL;
6666                    axisInfo.axis = -1;
6667                }
6668
6669                // Apply flat override.
6670                int32_t rawFlat = axisInfo.flatOverride < 0
6671                        ? rawAxisInfo.flat : axisInfo.flatOverride;
6672
6673                // Calculate scaling factors and limits.
6674                Axis axis;
6675                if (axisInfo.mode == AxisInfo::MODE_SPLIT) {
6676                    float scale = 1.0f / (axisInfo.splitValue - rawAxisInfo.minValue);
6677                    float highScale = 1.0f / (rawAxisInfo.maxValue - axisInfo.splitValue);
6678                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
6679                            scale, 0.0f, highScale, 0.0f,
6680                            0.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
6681                            rawAxisInfo.resolution * scale);
6682                } else if (isCenteredAxis(axisInfo.axis)) {
6683                    float scale = 2.0f / (rawAxisInfo.maxValue - rawAxisInfo.minValue);
6684                    float offset = avg(rawAxisInfo.minValue, rawAxisInfo.maxValue) * -scale;
6685                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
6686                            scale, offset, scale, offset,
6687                            -1.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
6688                            rawAxisInfo.resolution * scale);
6689                } else {
6690                    float scale = 1.0f / (rawAxisInfo.maxValue - rawAxisInfo.minValue);
6691                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
6692                            scale, 0.0f, scale, 0.0f,
6693                            0.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
6694                            rawAxisInfo.resolution * scale);
6695                }
6696
6697                // To eliminate noise while the joystick is at rest, filter out small variations
6698                // in axis values up front.
6699                axis.filter = axis.fuzz ? axis.fuzz : axis.flat * 0.25f;
6700
6701                mAxes.add(abs, axis);
6702            }
6703        }
6704
6705        // If there are too many axes, start dropping them.
6706        // Prefer to keep explicitly mapped axes.
6707        if (mAxes.size() > PointerCoords::MAX_AXES) {
6708            ALOGI("Joystick '%s' has %zu axes but the framework only supports a maximum of %d.",
6709                    getDeviceName().string(), mAxes.size(), PointerCoords::MAX_AXES);
6710            pruneAxes(true);
6711            pruneAxes(false);
6712        }
6713
6714        // Assign generic axis ids to remaining axes.
6715        int32_t nextGenericAxisId = AMOTION_EVENT_AXIS_GENERIC_1;
6716        size_t numAxes = mAxes.size();
6717        for (size_t i = 0; i < numAxes; i++) {
6718            Axis& axis = mAxes.editValueAt(i);
6719            if (axis.axisInfo.axis < 0) {
6720                while (nextGenericAxisId <= AMOTION_EVENT_AXIS_GENERIC_16
6721                        && haveAxis(nextGenericAxisId)) {
6722                    nextGenericAxisId += 1;
6723                }
6724
6725                if (nextGenericAxisId <= AMOTION_EVENT_AXIS_GENERIC_16) {
6726                    axis.axisInfo.axis = nextGenericAxisId;
6727                    nextGenericAxisId += 1;
6728                } else {
6729                    ALOGI("Ignoring joystick '%s' axis %d because all of the generic axis ids "
6730                            "have already been assigned to other axes.",
6731                            getDeviceName().string(), mAxes.keyAt(i));
6732                    mAxes.removeItemsAt(i--);
6733                    numAxes -= 1;
6734                }
6735            }
6736        }
6737    }
6738}
6739
6740bool JoystickInputMapper::haveAxis(int32_t axisId) {
6741    size_t numAxes = mAxes.size();
6742    for (size_t i = 0; i < numAxes; i++) {
6743        const Axis& axis = mAxes.valueAt(i);
6744        if (axis.axisInfo.axis == axisId
6745                || (axis.axisInfo.mode == AxisInfo::MODE_SPLIT
6746                        && axis.axisInfo.highAxis == axisId)) {
6747            return true;
6748        }
6749    }
6750    return false;
6751}
6752
6753void JoystickInputMapper::pruneAxes(bool ignoreExplicitlyMappedAxes) {
6754    size_t i = mAxes.size();
6755    while (mAxes.size() > PointerCoords::MAX_AXES && i-- > 0) {
6756        if (ignoreExplicitlyMappedAxes && mAxes.valueAt(i).explicitlyMapped) {
6757            continue;
6758        }
6759        ALOGI("Discarding joystick '%s' axis %d because there are too many axes.",
6760                getDeviceName().string(), mAxes.keyAt(i));
6761        mAxes.removeItemsAt(i);
6762    }
6763}
6764
6765bool JoystickInputMapper::isCenteredAxis(int32_t axis) {
6766    switch (axis) {
6767    case AMOTION_EVENT_AXIS_X:
6768    case AMOTION_EVENT_AXIS_Y:
6769    case AMOTION_EVENT_AXIS_Z:
6770    case AMOTION_EVENT_AXIS_RX:
6771    case AMOTION_EVENT_AXIS_RY:
6772    case AMOTION_EVENT_AXIS_RZ:
6773    case AMOTION_EVENT_AXIS_HAT_X:
6774    case AMOTION_EVENT_AXIS_HAT_Y:
6775    case AMOTION_EVENT_AXIS_ORIENTATION:
6776    case AMOTION_EVENT_AXIS_RUDDER:
6777    case AMOTION_EVENT_AXIS_WHEEL:
6778        return true;
6779    default:
6780        return false;
6781    }
6782}
6783
6784void JoystickInputMapper::reset(nsecs_t when) {
6785    // Recenter all axes.
6786    size_t numAxes = mAxes.size();
6787    for (size_t i = 0; i < numAxes; i++) {
6788        Axis& axis = mAxes.editValueAt(i);
6789        axis.resetValue();
6790    }
6791
6792    InputMapper::reset(when);
6793}
6794
6795void JoystickInputMapper::process(const RawEvent* rawEvent) {
6796    switch (rawEvent->type) {
6797    case EV_ABS: {
6798        ssize_t index = mAxes.indexOfKey(rawEvent->code);
6799        if (index >= 0) {
6800            Axis& axis = mAxes.editValueAt(index);
6801            float newValue, highNewValue;
6802            switch (axis.axisInfo.mode) {
6803            case AxisInfo::MODE_INVERT:
6804                newValue = (axis.rawAxisInfo.maxValue - rawEvent->value)
6805                        * axis.scale + axis.offset;
6806                highNewValue = 0.0f;
6807                break;
6808            case AxisInfo::MODE_SPLIT:
6809                if (rawEvent->value < axis.axisInfo.splitValue) {
6810                    newValue = (axis.axisInfo.splitValue - rawEvent->value)
6811                            * axis.scale + axis.offset;
6812                    highNewValue = 0.0f;
6813                } else if (rawEvent->value > axis.axisInfo.splitValue) {
6814                    newValue = 0.0f;
6815                    highNewValue = (rawEvent->value - axis.axisInfo.splitValue)
6816                            * axis.highScale + axis.highOffset;
6817                } else {
6818                    newValue = 0.0f;
6819                    highNewValue = 0.0f;
6820                }
6821                break;
6822            default:
6823                newValue = rawEvent->value * axis.scale + axis.offset;
6824                highNewValue = 0.0f;
6825                break;
6826            }
6827            axis.newValue = newValue;
6828            axis.highNewValue = highNewValue;
6829        }
6830        break;
6831    }
6832
6833    case EV_SYN:
6834        switch (rawEvent->code) {
6835        case SYN_REPORT:
6836            sync(rawEvent->when, false /*force*/);
6837            break;
6838        }
6839        break;
6840    }
6841}
6842
6843void JoystickInputMapper::sync(nsecs_t when, bool force) {
6844    if (!filterAxes(force)) {
6845        return;
6846    }
6847
6848    int32_t metaState = mContext->getGlobalMetaState();
6849    int32_t buttonState = 0;
6850
6851    PointerProperties pointerProperties;
6852    pointerProperties.clear();
6853    pointerProperties.id = 0;
6854    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
6855
6856    PointerCoords pointerCoords;
6857    pointerCoords.clear();
6858
6859    size_t numAxes = mAxes.size();
6860    for (size_t i = 0; i < numAxes; i++) {
6861        const Axis& axis = mAxes.valueAt(i);
6862        setPointerCoordsAxisValue(&pointerCoords, axis.axisInfo.axis, axis.currentValue);
6863        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
6864            setPointerCoordsAxisValue(&pointerCoords, axis.axisInfo.highAxis,
6865                    axis.highCurrentValue);
6866        }
6867    }
6868
6869    // Moving a joystick axis should not wake the device because joysticks can
6870    // be fairly noisy even when not in use.  On the other hand, pushing a gamepad
6871    // button will likely wake the device.
6872    // TODO: Use the input device configuration to control this behavior more finely.
6873    uint32_t policyFlags = 0;
6874
6875    NotifyMotionArgs args(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, policyFlags,
6876            AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
6877            ADISPLAY_ID_NONE, 1, &pointerProperties, &pointerCoords, 0, 0, 0);
6878    getListener()->notifyMotion(&args);
6879}
6880
6881void JoystickInputMapper::setPointerCoordsAxisValue(PointerCoords* pointerCoords,
6882        int32_t axis, float value) {
6883    pointerCoords->setAxisValue(axis, value);
6884    /* In order to ease the transition for developers from using the old axes
6885     * to the newer, more semantically correct axes, we'll continue to produce
6886     * values for the old axes as mirrors of the value of their corresponding
6887     * new axes. */
6888    int32_t compatAxis = getCompatAxis(axis);
6889    if (compatAxis >= 0) {
6890        pointerCoords->setAxisValue(compatAxis, value);
6891    }
6892}
6893
6894bool JoystickInputMapper::filterAxes(bool force) {
6895    bool atLeastOneSignificantChange = force;
6896    size_t numAxes = mAxes.size();
6897    for (size_t i = 0; i < numAxes; i++) {
6898        Axis& axis = mAxes.editValueAt(i);
6899        if (force || hasValueChangedSignificantly(axis.filter,
6900                axis.newValue, axis.currentValue, axis.min, axis.max)) {
6901            axis.currentValue = axis.newValue;
6902            atLeastOneSignificantChange = true;
6903        }
6904        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
6905            if (force || hasValueChangedSignificantly(axis.filter,
6906                    axis.highNewValue, axis.highCurrentValue, axis.min, axis.max)) {
6907                axis.highCurrentValue = axis.highNewValue;
6908                atLeastOneSignificantChange = true;
6909            }
6910        }
6911    }
6912    return atLeastOneSignificantChange;
6913}
6914
6915bool JoystickInputMapper::hasValueChangedSignificantly(
6916        float filter, float newValue, float currentValue, float min, float max) {
6917    if (newValue != currentValue) {
6918        // Filter out small changes in value unless the value is converging on the axis
6919        // bounds or center point.  This is intended to reduce the amount of information
6920        // sent to applications by particularly noisy joysticks (such as PS3).
6921        if (fabs(newValue - currentValue) > filter
6922                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, min)
6923                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, max)
6924                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, 0)) {
6925            return true;
6926        }
6927    }
6928    return false;
6929}
6930
6931bool JoystickInputMapper::hasMovedNearerToValueWithinFilteredRange(
6932        float filter, float newValue, float currentValue, float thresholdValue) {
6933    float newDistance = fabs(newValue - thresholdValue);
6934    if (newDistance < filter) {
6935        float oldDistance = fabs(currentValue - thresholdValue);
6936        if (newDistance < oldDistance) {
6937            return true;
6938        }
6939    }
6940    return false;
6941}
6942
6943} // namespace android
6944