InputReader.cpp revision 7b159c9a4f589da7fdab7c16f3aefea25e0e7e4f 
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_STYLUS_PRIMARY;
1446    }
1447    if (mBtnStylus2) {
1448        result |= AMOTION_EVENT_BUTTON_STYLUS_SECONDARY;
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    int32_t buttonsPressed = currentButtonState & ~lastButtonState;
2551    int32_t buttonsReleased = lastButtonState & ~currentButtonState;
2552
2553    float deltaX = mCursorMotionAccumulator.getRelativeX() * mXScale;
2554    float deltaY = mCursorMotionAccumulator.getRelativeY() * mYScale;
2555    bool moved = deltaX != 0 || deltaY != 0;
2556
2557    // Rotate delta according to orientation if needed.
2558    if (mParameters.orientationAware && mParameters.hasAssociatedDisplay
2559            && (deltaX != 0.0f || deltaY != 0.0f)) {
2560        rotateDelta(mOrientation, &deltaX, &deltaY);
2561    }
2562
2563    // Move the pointer.
2564    PointerProperties pointerProperties;
2565    pointerProperties.clear();
2566    pointerProperties.id = 0;
2567    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_MOUSE;
2568
2569    PointerCoords pointerCoords;
2570    pointerCoords.clear();
2571
2572    float vscroll = mCursorScrollAccumulator.getRelativeVWheel();
2573    float hscroll = mCursorScrollAccumulator.getRelativeHWheel();
2574    bool scrolled = vscroll != 0 || hscroll != 0;
2575
2576    mWheelYVelocityControl.move(when, NULL, &vscroll);
2577    mWheelXVelocityControl.move(when, &hscroll, NULL);
2578
2579    mPointerVelocityControl.move(when, &deltaX, &deltaY);
2580
2581    int32_t displayId;
2582    if (mPointerController != NULL) {
2583        if (moved || scrolled || buttonsChanged) {
2584            mPointerController->setPresentation(
2585                    PointerControllerInterface::PRESENTATION_POINTER);
2586
2587            if (moved) {
2588                mPointerController->move(deltaX, deltaY);
2589            }
2590
2591            if (buttonsChanged) {
2592                mPointerController->setButtonState(currentButtonState);
2593            }
2594
2595            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
2596        }
2597
2598        float x, y;
2599        mPointerController->getPosition(&x, &y);
2600        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
2601        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
2602        displayId = ADISPLAY_ID_DEFAULT;
2603    } else {
2604        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, deltaX);
2605        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, deltaY);
2606        displayId = ADISPLAY_ID_NONE;
2607    }
2608
2609    pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, down ? 1.0f : 0.0f);
2610
2611    // Moving an external trackball or mouse should wake the device.
2612    // We don't do this for internal cursor devices to prevent them from waking up
2613    // the device in your pocket.
2614    // TODO: Use the input device configuration to control this behavior more finely.
2615    uint32_t policyFlags = 0;
2616    if ((buttonsPressed || moved || scrolled) && getDevice()->isExternal()) {
2617        policyFlags |= POLICY_FLAG_WAKE;
2618    }
2619
2620    // Synthesize key down from buttons if needed.
2621    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
2622            policyFlags, lastButtonState, currentButtonState);
2623
2624    // Send motion event.
2625    if (downChanged || moved || scrolled || buttonsChanged) {
2626        int32_t metaState = mContext->getGlobalMetaState();
2627        int32_t buttonState = lastButtonState;
2628        int32_t motionEventAction;
2629        if (downChanged) {
2630            motionEventAction = down ? AMOTION_EVENT_ACTION_DOWN : AMOTION_EVENT_ACTION_UP;
2631        } else if (down || mPointerController == NULL) {
2632            motionEventAction = AMOTION_EVENT_ACTION_MOVE;
2633        } else {
2634            motionEventAction = AMOTION_EVENT_ACTION_HOVER_MOVE;
2635        }
2636
2637        if (buttonsReleased) {
2638            BitSet32 released(buttonsReleased);
2639            while (!released.isEmpty()) {
2640                int32_t actionButton = BitSet32::valueForBit(released.clearFirstMarkedBit());
2641                buttonState &= ~actionButton;
2642                NotifyMotionArgs releaseArgs(when, getDeviceId(), mSource, policyFlags,
2643                        AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton, 0,
2644                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
2645                        displayId, 1, &pointerProperties, &pointerCoords,
2646                        mXPrecision, mYPrecision, downTime);
2647                getListener()->notifyMotion(&releaseArgs);
2648            }
2649        }
2650
2651        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
2652                motionEventAction, 0, 0, metaState, currentButtonState,
2653                AMOTION_EVENT_EDGE_FLAG_NONE,
2654                displayId, 1, &pointerProperties, &pointerCoords,
2655                mXPrecision, mYPrecision, downTime);
2656        getListener()->notifyMotion(&args);
2657
2658        if (buttonsPressed) {
2659            BitSet32 pressed(buttonsPressed);
2660            while (!pressed.isEmpty()) {
2661                int32_t actionButton = BitSet32::valueForBit(pressed.clearFirstMarkedBit());
2662                buttonState |= actionButton;
2663                NotifyMotionArgs pressArgs(when, getDeviceId(), mSource, policyFlags,
2664                        AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton, 0,
2665                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
2666                        displayId, 1, &pointerProperties, &pointerCoords,
2667                        mXPrecision, mYPrecision, downTime);
2668                getListener()->notifyMotion(&pressArgs);
2669            }
2670        }
2671
2672        ALOG_ASSERT(buttonState == currentButtonState);
2673
2674        // Send hover move after UP to tell the application that the mouse is hovering now.
2675        if (motionEventAction == AMOTION_EVENT_ACTION_UP
2676                && mPointerController != NULL) {
2677            NotifyMotionArgs hoverArgs(when, getDeviceId(), mSource, policyFlags,
2678                    AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
2679                    metaState, currentButtonState, AMOTION_EVENT_EDGE_FLAG_NONE,
2680                    displayId, 1, &pointerProperties, &pointerCoords,
2681                    mXPrecision, mYPrecision, downTime);
2682            getListener()->notifyMotion(&hoverArgs);
2683        }
2684
2685        // Send scroll events.
2686        if (scrolled) {
2687            pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
2688            pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
2689
2690            NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
2691                    AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, currentButtonState,
2692                    AMOTION_EVENT_EDGE_FLAG_NONE,
2693                    displayId, 1, &pointerProperties, &pointerCoords,
2694                    mXPrecision, mYPrecision, downTime);
2695            getListener()->notifyMotion(&scrollArgs);
2696        }
2697    }
2698
2699    // Synthesize key up from buttons if needed.
2700    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
2701            policyFlags, lastButtonState, currentButtonState);
2702
2703    mCursorMotionAccumulator.finishSync();
2704    mCursorScrollAccumulator.finishSync();
2705}
2706
2707int32_t CursorInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
2708    if (scanCode >= BTN_MOUSE && scanCode < BTN_JOYSTICK) {
2709        return getEventHub()->getScanCodeState(getDeviceId(), scanCode);
2710    } else {
2711        return AKEY_STATE_UNKNOWN;
2712    }
2713}
2714
2715void CursorInputMapper::fadePointer() {
2716    if (mPointerController != NULL) {
2717        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
2718    }
2719}
2720
2721
2722// --- TouchInputMapper ---
2723
2724TouchInputMapper::TouchInputMapper(InputDevice* device) :
2725        InputMapper(device),
2726        mSource(0), mDeviceMode(DEVICE_MODE_DISABLED),
2727        mSurfaceWidth(-1), mSurfaceHeight(-1), mSurfaceLeft(0), mSurfaceTop(0),
2728        mSurfaceOrientation(DISPLAY_ORIENTATION_0) {
2729}
2730
2731TouchInputMapper::~TouchInputMapper() {
2732}
2733
2734uint32_t TouchInputMapper::getSources() {
2735    return mSource;
2736}
2737
2738void TouchInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
2739    InputMapper::populateDeviceInfo(info);
2740
2741    if (mDeviceMode != DEVICE_MODE_DISABLED) {
2742        info->addMotionRange(mOrientedRanges.x);
2743        info->addMotionRange(mOrientedRanges.y);
2744        info->addMotionRange(mOrientedRanges.pressure);
2745
2746        if (mOrientedRanges.haveSize) {
2747            info->addMotionRange(mOrientedRanges.size);
2748        }
2749
2750        if (mOrientedRanges.haveTouchSize) {
2751            info->addMotionRange(mOrientedRanges.touchMajor);
2752            info->addMotionRange(mOrientedRanges.touchMinor);
2753        }
2754
2755        if (mOrientedRanges.haveToolSize) {
2756            info->addMotionRange(mOrientedRanges.toolMajor);
2757            info->addMotionRange(mOrientedRanges.toolMinor);
2758        }
2759
2760        if (mOrientedRanges.haveOrientation) {
2761            info->addMotionRange(mOrientedRanges.orientation);
2762        }
2763
2764        if (mOrientedRanges.haveDistance) {
2765            info->addMotionRange(mOrientedRanges.distance);
2766        }
2767
2768        if (mOrientedRanges.haveTilt) {
2769            info->addMotionRange(mOrientedRanges.tilt);
2770        }
2771
2772        if (mCursorScrollAccumulator.haveRelativeVWheel()) {
2773            info->addMotionRange(AMOTION_EVENT_AXIS_VSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
2774                    0.0f);
2775        }
2776        if (mCursorScrollAccumulator.haveRelativeHWheel()) {
2777            info->addMotionRange(AMOTION_EVENT_AXIS_HSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
2778                    0.0f);
2779        }
2780        if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_BOX) {
2781            const InputDeviceInfo::MotionRange& x = mOrientedRanges.x;
2782            const InputDeviceInfo::MotionRange& y = mOrientedRanges.y;
2783            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_1, mSource, x.min, x.max, x.flat,
2784                    x.fuzz, x.resolution);
2785            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_2, mSource, y.min, y.max, y.flat,
2786                    y.fuzz, y.resolution);
2787            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_3, mSource, x.min, x.max, x.flat,
2788                    x.fuzz, x.resolution);
2789            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_4, mSource, y.min, y.max, y.flat,
2790                    y.fuzz, y.resolution);
2791        }
2792        info->setButtonUnderPad(mParameters.hasButtonUnderPad);
2793    }
2794}
2795
2796void TouchInputMapper::dump(String8& dump) {
2797    dump.append(INDENT2 "Touch Input Mapper:\n");
2798    dumpParameters(dump);
2799    dumpVirtualKeys(dump);
2800    dumpRawPointerAxes(dump);
2801    dumpCalibration(dump);
2802    dumpAffineTransformation(dump);
2803    dumpSurface(dump);
2804
2805    dump.appendFormat(INDENT3 "Translation and Scaling Factors:\n");
2806    dump.appendFormat(INDENT4 "XTranslate: %0.3f\n", mXTranslate);
2807    dump.appendFormat(INDENT4 "YTranslate: %0.3f\n", mYTranslate);
2808    dump.appendFormat(INDENT4 "XScale: %0.3f\n", mXScale);
2809    dump.appendFormat(INDENT4 "YScale: %0.3f\n", mYScale);
2810    dump.appendFormat(INDENT4 "XPrecision: %0.3f\n", mXPrecision);
2811    dump.appendFormat(INDENT4 "YPrecision: %0.3f\n", mYPrecision);
2812    dump.appendFormat(INDENT4 "GeometricScale: %0.3f\n", mGeometricScale);
2813    dump.appendFormat(INDENT4 "PressureScale: %0.3f\n", mPressureScale);
2814    dump.appendFormat(INDENT4 "SizeScale: %0.3f\n", mSizeScale);
2815    dump.appendFormat(INDENT4 "OrientationScale: %0.3f\n", mOrientationScale);
2816    dump.appendFormat(INDENT4 "DistanceScale: %0.3f\n", mDistanceScale);
2817    dump.appendFormat(INDENT4 "HaveTilt: %s\n", toString(mHaveTilt));
2818    dump.appendFormat(INDENT4 "TiltXCenter: %0.3f\n", mTiltXCenter);
2819    dump.appendFormat(INDENT4 "TiltXScale: %0.3f\n", mTiltXScale);
2820    dump.appendFormat(INDENT4 "TiltYCenter: %0.3f\n", mTiltYCenter);
2821    dump.appendFormat(INDENT4 "TiltYScale: %0.3f\n", mTiltYScale);
2822
2823    dump.appendFormat(INDENT3 "Last Raw Button State: 0x%08x\n", mLastRawState.buttonState);
2824    dump.appendFormat(INDENT3 "Last Raw Touch: pointerCount=%d\n",
2825            mLastRawState.rawPointerData.pointerCount);
2826    for (uint32_t i = 0; i < mLastRawState.rawPointerData.pointerCount; i++) {
2827        const RawPointerData::Pointer& pointer = mLastRawState.rawPointerData.pointers[i];
2828        dump.appendFormat(INDENT4 "[%d]: id=%d, x=%d, y=%d, pressure=%d, "
2829                "touchMajor=%d, touchMinor=%d, toolMajor=%d, toolMinor=%d, "
2830                "orientation=%d, tiltX=%d, tiltY=%d, distance=%d, "
2831                "toolType=%d, isHovering=%s\n", i,
2832                pointer.id, pointer.x, pointer.y, pointer.pressure,
2833                pointer.touchMajor, pointer.touchMinor,
2834                pointer.toolMajor, pointer.toolMinor,
2835                pointer.orientation, pointer.tiltX, pointer.tiltY, pointer.distance,
2836                pointer.toolType, toString(pointer.isHovering));
2837    }
2838
2839    dump.appendFormat(INDENT3 "Last Cooked Button State: 0x%08x\n", mLastCookedState.buttonState);
2840    dump.appendFormat(INDENT3 "Last Cooked Touch: pointerCount=%d\n",
2841            mLastCookedState.cookedPointerData.pointerCount);
2842    for (uint32_t i = 0; i < mLastCookedState.cookedPointerData.pointerCount; i++) {
2843        const PointerProperties& pointerProperties =
2844                mLastCookedState.cookedPointerData.pointerProperties[i];
2845        const PointerCoords& pointerCoords = mLastCookedState.cookedPointerData.pointerCoords[i];
2846        dump.appendFormat(INDENT4 "[%d]: id=%d, x=%0.3f, y=%0.3f, pressure=%0.3f, "
2847                "touchMajor=%0.3f, touchMinor=%0.3f, toolMajor=%0.3f, toolMinor=%0.3f, "
2848                "orientation=%0.3f, tilt=%0.3f, distance=%0.3f, "
2849                "toolType=%d, isHovering=%s\n", i,
2850                pointerProperties.id,
2851                pointerCoords.getX(),
2852                pointerCoords.getY(),
2853                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE),
2854                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR),
2855                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
2856                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
2857                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
2858                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION),
2859                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TILT),
2860                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_DISTANCE),
2861                pointerProperties.toolType,
2862                toString(mLastCookedState.cookedPointerData.isHovering(i)));
2863    }
2864
2865    dump.append(INDENT3 "Stylus Fusion:\n");
2866    dump.appendFormat(INDENT4 "ExternalStylusConnected: %s\n",
2867            toString(mExternalStylusConnected));
2868    dump.appendFormat(INDENT4 "External Stylus ID: %" PRId64 "\n", mExternalStylusId);
2869    dump.appendFormat(INDENT4 "External Stylus Data Timeout: %" PRId64 "\n",
2870            mExternalStylusFusionTimeout);
2871    dump.append(INDENT3 "External Stylus State:\n");
2872    dumpStylusState(dump, mExternalStylusState);
2873
2874    if (mDeviceMode == DEVICE_MODE_POINTER) {
2875        dump.appendFormat(INDENT3 "Pointer Gesture Detector:\n");
2876        dump.appendFormat(INDENT4 "XMovementScale: %0.3f\n",
2877                mPointerXMovementScale);
2878        dump.appendFormat(INDENT4 "YMovementScale: %0.3f\n",
2879                mPointerYMovementScale);
2880        dump.appendFormat(INDENT4 "XZoomScale: %0.3f\n",
2881                mPointerXZoomScale);
2882        dump.appendFormat(INDENT4 "YZoomScale: %0.3f\n",
2883                mPointerYZoomScale);
2884        dump.appendFormat(INDENT4 "MaxSwipeWidth: %f\n",
2885                mPointerGestureMaxSwipeWidth);
2886    }
2887}
2888
2889void TouchInputMapper::configure(nsecs_t when,
2890        const InputReaderConfiguration* config, uint32_t changes) {
2891    InputMapper::configure(when, config, changes);
2892
2893    mConfig = *config;
2894
2895    if (!changes) { // first time only
2896        // Configure basic parameters.
2897        configureParameters();
2898
2899        // Configure common accumulators.
2900        mCursorScrollAccumulator.configure(getDevice());
2901        mTouchButtonAccumulator.configure(getDevice());
2902
2903        // Configure absolute axis information.
2904        configureRawPointerAxes();
2905
2906        // Prepare input device calibration.
2907        parseCalibration();
2908        resolveCalibration();
2909    }
2910
2911    if (!changes || (changes & InputReaderConfiguration::CHANGE_TOUCH_AFFINE_TRANSFORMATION)) {
2912        // Update location calibration to reflect current settings
2913        updateAffineTransformation();
2914    }
2915
2916    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {
2917        // Update pointer speed.
2918        mPointerVelocityControl.setParameters(mConfig.pointerVelocityControlParameters);
2919        mWheelXVelocityControl.setParameters(mConfig.wheelVelocityControlParameters);
2920        mWheelYVelocityControl.setParameters(mConfig.wheelVelocityControlParameters);
2921    }
2922
2923    bool resetNeeded = false;
2924    if (!changes || (changes & (InputReaderConfiguration::CHANGE_DISPLAY_INFO
2925            | InputReaderConfiguration::CHANGE_POINTER_GESTURE_ENABLEMENT
2926            | InputReaderConfiguration::CHANGE_SHOW_TOUCHES
2927            | InputReaderConfiguration::CHANGE_EXTERNAL_STYLUS_PRESENCE))) {
2928        // Configure device sources, surface dimensions, orientation and
2929        // scaling factors.
2930        configureSurface(when, &resetNeeded);
2931    }
2932
2933    if (changes && resetNeeded) {
2934        // Send reset, unless this is the first time the device has been configured,
2935        // in which case the reader will call reset itself after all mappers are ready.
2936        getDevice()->notifyReset(when);
2937    }
2938}
2939
2940void TouchInputMapper::resolveExternalStylusPresence() {
2941    Vector<InputDeviceInfo> devices;
2942    mContext->getExternalStylusDevices(devices);
2943    mExternalStylusConnected = !devices.isEmpty();
2944
2945    if (!mExternalStylusConnected) {
2946        resetExternalStylus();
2947    }
2948}
2949
2950void TouchInputMapper::configureParameters() {
2951    // Use the pointer presentation mode for devices that do not support distinct
2952    // multitouch.  The spot-based presentation relies on being able to accurately
2953    // locate two or more fingers on the touch pad.
2954    mParameters.gestureMode = getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_SEMI_MT)
2955            ? Parameters::GESTURE_MODE_POINTER : Parameters::GESTURE_MODE_SPOTS;
2956
2957    String8 gestureModeString;
2958    if (getDevice()->getConfiguration().tryGetProperty(String8("touch.gestureMode"),
2959            gestureModeString)) {
2960        if (gestureModeString == "pointer") {
2961            mParameters.gestureMode = Parameters::GESTURE_MODE_POINTER;
2962        } else if (gestureModeString == "spots") {
2963            mParameters.gestureMode = Parameters::GESTURE_MODE_SPOTS;
2964        } else if (gestureModeString != "default") {
2965            ALOGW("Invalid value for touch.gestureMode: '%s'", gestureModeString.string());
2966        }
2967    }
2968
2969    if (getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_DIRECT)) {
2970        // The device is a touch screen.
2971        mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_SCREEN;
2972    } else if (getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_POINTER)) {
2973        // The device is a pointing device like a track pad.
2974        mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
2975    } else if (getEventHub()->hasRelativeAxis(getDeviceId(), REL_X)
2976            || getEventHub()->hasRelativeAxis(getDeviceId(), REL_Y)) {
2977        // The device is a cursor device with a touch pad attached.
2978        // By default don't use the touch pad to move the pointer.
2979        mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_PAD;
2980    } else {
2981        // The device is a touch pad of unknown purpose.
2982        mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
2983    }
2984
2985    mParameters.hasButtonUnderPad=
2986            getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_BUTTONPAD);
2987
2988    String8 deviceTypeString;
2989    if (getDevice()->getConfiguration().tryGetProperty(String8("touch.deviceType"),
2990            deviceTypeString)) {
2991        if (deviceTypeString == "touchScreen") {
2992            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_SCREEN;
2993        } else if (deviceTypeString == "touchPad") {
2994            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_PAD;
2995        } else if (deviceTypeString == "touchNavigation") {
2996            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_NAVIGATION;
2997        } else if (deviceTypeString == "pointer") {
2998            mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
2999        } else if (deviceTypeString != "default") {
3000            ALOGW("Invalid value for touch.deviceType: '%s'", deviceTypeString.string());
3001        }
3002    }
3003
3004    mParameters.orientationAware = mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN;
3005    getDevice()->getConfiguration().tryGetProperty(String8("touch.orientationAware"),
3006            mParameters.orientationAware);
3007
3008    mParameters.hasAssociatedDisplay = false;
3009    mParameters.associatedDisplayIsExternal = false;
3010    if (mParameters.orientationAware
3011            || mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
3012            || mParameters.deviceType == Parameters::DEVICE_TYPE_POINTER) {
3013        mParameters.hasAssociatedDisplay = true;
3014        mParameters.associatedDisplayIsExternal =
3015                mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
3016                        && getDevice()->isExternal();
3017    }
3018
3019    // Initial downs on external touch devices should wake the device.
3020    // Normally we don't do this for internal touch screens to prevent them from waking
3021    // up in your pocket but you can enable it using the input device configuration.
3022    mParameters.wake = getDevice()->isExternal();
3023    getDevice()->getConfiguration().tryGetProperty(String8("touch.wake"),
3024            mParameters.wake);
3025}
3026
3027void TouchInputMapper::dumpParameters(String8& dump) {
3028    dump.append(INDENT3 "Parameters:\n");
3029
3030    switch (mParameters.gestureMode) {
3031    case Parameters::GESTURE_MODE_POINTER:
3032        dump.append(INDENT4 "GestureMode: pointer\n");
3033        break;
3034    case Parameters::GESTURE_MODE_SPOTS:
3035        dump.append(INDENT4 "GestureMode: spots\n");
3036        break;
3037    default:
3038        assert(false);
3039    }
3040
3041    switch (mParameters.deviceType) {
3042    case Parameters::DEVICE_TYPE_TOUCH_SCREEN:
3043        dump.append(INDENT4 "DeviceType: touchScreen\n");
3044        break;
3045    case Parameters::DEVICE_TYPE_TOUCH_PAD:
3046        dump.append(INDENT4 "DeviceType: touchPad\n");
3047        break;
3048    case Parameters::DEVICE_TYPE_TOUCH_NAVIGATION:
3049        dump.append(INDENT4 "DeviceType: touchNavigation\n");
3050        break;
3051    case Parameters::DEVICE_TYPE_POINTER:
3052        dump.append(INDENT4 "DeviceType: pointer\n");
3053        break;
3054    default:
3055        ALOG_ASSERT(false);
3056    }
3057
3058    dump.appendFormat(INDENT4 "AssociatedDisplay: hasAssociatedDisplay=%s, isExternal=%s\n",
3059            toString(mParameters.hasAssociatedDisplay),
3060            toString(mParameters.associatedDisplayIsExternal));
3061    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
3062            toString(mParameters.orientationAware));
3063}
3064
3065void TouchInputMapper::configureRawPointerAxes() {
3066    mRawPointerAxes.clear();
3067}
3068
3069void TouchInputMapper::dumpRawPointerAxes(String8& dump) {
3070    dump.append(INDENT3 "Raw Touch Axes:\n");
3071    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.x, "X");
3072    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.y, "Y");
3073    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.pressure, "Pressure");
3074    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.touchMajor, "TouchMajor");
3075    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.touchMinor, "TouchMinor");
3076    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.toolMajor, "ToolMajor");
3077    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.toolMinor, "ToolMinor");
3078    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.orientation, "Orientation");
3079    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.distance, "Distance");
3080    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.tiltX, "TiltX");
3081    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.tiltY, "TiltY");
3082    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.trackingId, "TrackingId");
3083    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.slot, "Slot");
3084}
3085
3086bool TouchInputMapper::hasExternalStylus() const {
3087    return mExternalStylusConnected;
3088}
3089
3090void TouchInputMapper::configureSurface(nsecs_t when, bool* outResetNeeded) {
3091    int32_t oldDeviceMode = mDeviceMode;
3092
3093    resolveExternalStylusPresence();
3094
3095    // Determine device mode.
3096    if (mParameters.deviceType == Parameters::DEVICE_TYPE_POINTER
3097            && mConfig.pointerGesturesEnabled) {
3098        mSource = AINPUT_SOURCE_MOUSE;
3099        mDeviceMode = DEVICE_MODE_POINTER;
3100        if (hasStylus()) {
3101            mSource |= AINPUT_SOURCE_STYLUS;
3102        }
3103    } else if (mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
3104            && mParameters.hasAssociatedDisplay) {
3105        mSource = AINPUT_SOURCE_TOUCHSCREEN;
3106        mDeviceMode = DEVICE_MODE_DIRECT;
3107        if (hasStylus() || hasExternalStylus()) {
3108            mSource |= AINPUT_SOURCE_STYLUS;
3109        }
3110    } else if (mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_NAVIGATION) {
3111        mSource = AINPUT_SOURCE_TOUCH_NAVIGATION;
3112        mDeviceMode = DEVICE_MODE_NAVIGATION;
3113    } else {
3114        mSource = AINPUT_SOURCE_TOUCHPAD;
3115        mDeviceMode = DEVICE_MODE_UNSCALED;
3116    }
3117
3118    // Ensure we have valid X and Y axes.
3119    if (!mRawPointerAxes.x.valid || !mRawPointerAxes.y.valid) {
3120        ALOGW(INDENT "Touch device '%s' did not report support for X or Y axis!  "
3121                "The device will be inoperable.", getDeviceName().string());
3122        mDeviceMode = DEVICE_MODE_DISABLED;
3123        return;
3124    }
3125
3126    // Raw width and height in the natural orientation.
3127    int32_t rawWidth = mRawPointerAxes.x.maxValue - mRawPointerAxes.x.minValue + 1;
3128    int32_t rawHeight = mRawPointerAxes.y.maxValue - mRawPointerAxes.y.minValue + 1;
3129
3130    // Get associated display dimensions.
3131    DisplayViewport newViewport;
3132    if (mParameters.hasAssociatedDisplay) {
3133        if (!mConfig.getDisplayInfo(mParameters.associatedDisplayIsExternal, &newViewport)) {
3134            ALOGI(INDENT "Touch device '%s' could not query the properties of its associated "
3135                    "display.  The device will be inoperable until the display size "
3136                    "becomes available.",
3137                    getDeviceName().string());
3138            mDeviceMode = DEVICE_MODE_DISABLED;
3139            return;
3140        }
3141    } else {
3142        newViewport.setNonDisplayViewport(rawWidth, rawHeight);
3143    }
3144    bool viewportChanged = mViewport != newViewport;
3145    if (viewportChanged) {
3146        mViewport = newViewport;
3147
3148        if (mDeviceMode == DEVICE_MODE_DIRECT || mDeviceMode == DEVICE_MODE_POINTER) {
3149            // Convert rotated viewport to natural surface coordinates.
3150            int32_t naturalLogicalWidth, naturalLogicalHeight;
3151            int32_t naturalPhysicalWidth, naturalPhysicalHeight;
3152            int32_t naturalPhysicalLeft, naturalPhysicalTop;
3153            int32_t naturalDeviceWidth, naturalDeviceHeight;
3154            switch (mViewport.orientation) {
3155            case DISPLAY_ORIENTATION_90:
3156                naturalLogicalWidth = mViewport.logicalBottom - mViewport.logicalTop;
3157                naturalLogicalHeight = mViewport.logicalRight - mViewport.logicalLeft;
3158                naturalPhysicalWidth = mViewport.physicalBottom - mViewport.physicalTop;
3159                naturalPhysicalHeight = mViewport.physicalRight - mViewport.physicalLeft;
3160                naturalPhysicalLeft = mViewport.deviceHeight - mViewport.physicalBottom;
3161                naturalPhysicalTop = mViewport.physicalLeft;
3162                naturalDeviceWidth = mViewport.deviceHeight;
3163                naturalDeviceHeight = mViewport.deviceWidth;
3164                break;
3165            case DISPLAY_ORIENTATION_180:
3166                naturalLogicalWidth = mViewport.logicalRight - mViewport.logicalLeft;
3167                naturalLogicalHeight = mViewport.logicalBottom - mViewport.logicalTop;
3168                naturalPhysicalWidth = mViewport.physicalRight - mViewport.physicalLeft;
3169                naturalPhysicalHeight = mViewport.physicalBottom - mViewport.physicalTop;
3170                naturalPhysicalLeft = mViewport.deviceWidth - mViewport.physicalRight;
3171                naturalPhysicalTop = mViewport.deviceHeight - mViewport.physicalBottom;
3172                naturalDeviceWidth = mViewport.deviceWidth;
3173                naturalDeviceHeight = mViewport.deviceHeight;
3174                break;
3175            case DISPLAY_ORIENTATION_270:
3176                naturalLogicalWidth = mViewport.logicalBottom - mViewport.logicalTop;
3177                naturalLogicalHeight = mViewport.logicalRight - mViewport.logicalLeft;
3178                naturalPhysicalWidth = mViewport.physicalBottom - mViewport.physicalTop;
3179                naturalPhysicalHeight = mViewport.physicalRight - mViewport.physicalLeft;
3180                naturalPhysicalLeft = mViewport.physicalTop;
3181                naturalPhysicalTop = mViewport.deviceWidth - mViewport.physicalRight;
3182                naturalDeviceWidth = mViewport.deviceHeight;
3183                naturalDeviceHeight = mViewport.deviceWidth;
3184                break;
3185            case DISPLAY_ORIENTATION_0:
3186            default:
3187                naturalLogicalWidth = mViewport.logicalRight - mViewport.logicalLeft;
3188                naturalLogicalHeight = mViewport.logicalBottom - mViewport.logicalTop;
3189                naturalPhysicalWidth = mViewport.physicalRight - mViewport.physicalLeft;
3190                naturalPhysicalHeight = mViewport.physicalBottom - mViewport.physicalTop;
3191                naturalPhysicalLeft = mViewport.physicalLeft;
3192                naturalPhysicalTop = mViewport.physicalTop;
3193                naturalDeviceWidth = mViewport.deviceWidth;
3194                naturalDeviceHeight = mViewport.deviceHeight;
3195                break;
3196            }
3197
3198            mSurfaceWidth = naturalLogicalWidth * naturalDeviceWidth / naturalPhysicalWidth;
3199            mSurfaceHeight = naturalLogicalHeight * naturalDeviceHeight / naturalPhysicalHeight;
3200            mSurfaceLeft = naturalPhysicalLeft * naturalLogicalWidth / naturalPhysicalWidth;
3201            mSurfaceTop = naturalPhysicalTop * naturalLogicalHeight / naturalPhysicalHeight;
3202
3203            mSurfaceOrientation = mParameters.orientationAware ?
3204                    mViewport.orientation : DISPLAY_ORIENTATION_0;
3205        } else {
3206            mSurfaceWidth = rawWidth;
3207            mSurfaceHeight = rawHeight;
3208            mSurfaceLeft = 0;
3209            mSurfaceTop = 0;
3210            mSurfaceOrientation = DISPLAY_ORIENTATION_0;
3211        }
3212    }
3213
3214    // If moving between pointer modes, need to reset some state.
3215    bool deviceModeChanged = mDeviceMode != oldDeviceMode;
3216    if (deviceModeChanged) {
3217        mOrientedRanges.clear();
3218    }
3219
3220    // Create pointer controller if needed.
3221    if (mDeviceMode == DEVICE_MODE_POINTER ||
3222            (mDeviceMode == DEVICE_MODE_DIRECT && mConfig.showTouches)) {
3223        if (mPointerController == NULL) {
3224            mPointerController = getPolicy()->obtainPointerController(getDeviceId());
3225        }
3226    } else {
3227        mPointerController.clear();
3228    }
3229
3230    if (viewportChanged || deviceModeChanged) {
3231        ALOGI("Device reconfigured: id=%d, name='%s', size %dx%d, orientation %d, mode %d, "
3232                "display id %d",
3233                getDeviceId(), getDeviceName().string(), mSurfaceWidth, mSurfaceHeight,
3234                mSurfaceOrientation, mDeviceMode, mViewport.displayId);
3235
3236        // Configure X and Y factors.
3237        mXScale = float(mSurfaceWidth) / rawWidth;
3238        mYScale = float(mSurfaceHeight) / rawHeight;
3239        mXTranslate = -mSurfaceLeft;
3240        mYTranslate = -mSurfaceTop;
3241        mXPrecision = 1.0f / mXScale;
3242        mYPrecision = 1.0f / mYScale;
3243
3244        mOrientedRanges.x.axis = AMOTION_EVENT_AXIS_X;
3245        mOrientedRanges.x.source = mSource;
3246        mOrientedRanges.y.axis = AMOTION_EVENT_AXIS_Y;
3247        mOrientedRanges.y.source = mSource;
3248
3249        configureVirtualKeys();
3250
3251        // Scale factor for terms that are not oriented in a particular axis.
3252        // If the pixels are square then xScale == yScale otherwise we fake it
3253        // by choosing an average.
3254        mGeometricScale = avg(mXScale, mYScale);
3255
3256        // Size of diagonal axis.
3257        float diagonalSize = hypotf(mSurfaceWidth, mSurfaceHeight);
3258
3259        // Size factors.
3260        if (mCalibration.sizeCalibration != Calibration::SIZE_CALIBRATION_NONE) {
3261            if (mRawPointerAxes.touchMajor.valid
3262                    && mRawPointerAxes.touchMajor.maxValue != 0) {
3263                mSizeScale = 1.0f / mRawPointerAxes.touchMajor.maxValue;
3264            } else if (mRawPointerAxes.toolMajor.valid
3265                    && mRawPointerAxes.toolMajor.maxValue != 0) {
3266                mSizeScale = 1.0f / mRawPointerAxes.toolMajor.maxValue;
3267            } else {
3268                mSizeScale = 0.0f;
3269            }
3270
3271            mOrientedRanges.haveTouchSize = true;
3272            mOrientedRanges.haveToolSize = true;
3273            mOrientedRanges.haveSize = true;
3274
3275            mOrientedRanges.touchMajor.axis = AMOTION_EVENT_AXIS_TOUCH_MAJOR;
3276            mOrientedRanges.touchMajor.source = mSource;
3277            mOrientedRanges.touchMajor.min = 0;
3278            mOrientedRanges.touchMajor.max = diagonalSize;
3279            mOrientedRanges.touchMajor.flat = 0;
3280            mOrientedRanges.touchMajor.fuzz = 0;
3281            mOrientedRanges.touchMajor.resolution = 0;
3282
3283            mOrientedRanges.touchMinor = mOrientedRanges.touchMajor;
3284            mOrientedRanges.touchMinor.axis = AMOTION_EVENT_AXIS_TOUCH_MINOR;
3285
3286            mOrientedRanges.toolMajor.axis = AMOTION_EVENT_AXIS_TOOL_MAJOR;
3287            mOrientedRanges.toolMajor.source = mSource;
3288            mOrientedRanges.toolMajor.min = 0;
3289            mOrientedRanges.toolMajor.max = diagonalSize;
3290            mOrientedRanges.toolMajor.flat = 0;
3291            mOrientedRanges.toolMajor.fuzz = 0;
3292            mOrientedRanges.toolMajor.resolution = 0;
3293
3294            mOrientedRanges.toolMinor = mOrientedRanges.toolMajor;
3295            mOrientedRanges.toolMinor.axis = AMOTION_EVENT_AXIS_TOOL_MINOR;
3296
3297            mOrientedRanges.size.axis = AMOTION_EVENT_AXIS_SIZE;
3298            mOrientedRanges.size.source = mSource;
3299            mOrientedRanges.size.min = 0;
3300            mOrientedRanges.size.max = 1.0;
3301            mOrientedRanges.size.flat = 0;
3302            mOrientedRanges.size.fuzz = 0;
3303            mOrientedRanges.size.resolution = 0;
3304        } else {
3305            mSizeScale = 0.0f;
3306        }
3307
3308        // Pressure factors.
3309        mPressureScale = 0;
3310        if (mCalibration.pressureCalibration == Calibration::PRESSURE_CALIBRATION_PHYSICAL
3311                || mCalibration.pressureCalibration
3312                        == Calibration::PRESSURE_CALIBRATION_AMPLITUDE) {
3313            if (mCalibration.havePressureScale) {
3314                mPressureScale = mCalibration.pressureScale;
3315            } else if (mRawPointerAxes.pressure.valid
3316                    && mRawPointerAxes.pressure.maxValue != 0) {
3317                mPressureScale = 1.0f / mRawPointerAxes.pressure.maxValue;
3318            }
3319        }
3320
3321        mOrientedRanges.pressure.axis = AMOTION_EVENT_AXIS_PRESSURE;
3322        mOrientedRanges.pressure.source = mSource;
3323        mOrientedRanges.pressure.min = 0;
3324        mOrientedRanges.pressure.max = 1.0;
3325        mOrientedRanges.pressure.flat = 0;
3326        mOrientedRanges.pressure.fuzz = 0;
3327        mOrientedRanges.pressure.resolution = 0;
3328
3329        // Tilt
3330        mTiltXCenter = 0;
3331        mTiltXScale = 0;
3332        mTiltYCenter = 0;
3333        mTiltYScale = 0;
3334        mHaveTilt = mRawPointerAxes.tiltX.valid && mRawPointerAxes.tiltY.valid;
3335        if (mHaveTilt) {
3336            mTiltXCenter = avg(mRawPointerAxes.tiltX.minValue,
3337                    mRawPointerAxes.tiltX.maxValue);
3338            mTiltYCenter = avg(mRawPointerAxes.tiltY.minValue,
3339                    mRawPointerAxes.tiltY.maxValue);
3340            mTiltXScale = M_PI / 180;
3341            mTiltYScale = M_PI / 180;
3342
3343            mOrientedRanges.haveTilt = true;
3344
3345            mOrientedRanges.tilt.axis = AMOTION_EVENT_AXIS_TILT;
3346            mOrientedRanges.tilt.source = mSource;
3347            mOrientedRanges.tilt.min = 0;
3348            mOrientedRanges.tilt.max = M_PI_2;
3349            mOrientedRanges.tilt.flat = 0;
3350            mOrientedRanges.tilt.fuzz = 0;
3351            mOrientedRanges.tilt.resolution = 0;
3352        }
3353
3354        // Orientation
3355        mOrientationScale = 0;
3356        if (mHaveTilt) {
3357            mOrientedRanges.haveOrientation = true;
3358
3359            mOrientedRanges.orientation.axis = AMOTION_EVENT_AXIS_ORIENTATION;
3360            mOrientedRanges.orientation.source = mSource;
3361            mOrientedRanges.orientation.min = -M_PI;
3362            mOrientedRanges.orientation.max = M_PI;
3363            mOrientedRanges.orientation.flat = 0;
3364            mOrientedRanges.orientation.fuzz = 0;
3365            mOrientedRanges.orientation.resolution = 0;
3366        } else if (mCalibration.orientationCalibration !=
3367                Calibration::ORIENTATION_CALIBRATION_NONE) {
3368            if (mCalibration.orientationCalibration
3369                    == Calibration::ORIENTATION_CALIBRATION_INTERPOLATED) {
3370                if (mRawPointerAxes.orientation.valid) {
3371                    if (mRawPointerAxes.orientation.maxValue > 0) {
3372                        mOrientationScale = M_PI_2 / mRawPointerAxes.orientation.maxValue;
3373                    } else if (mRawPointerAxes.orientation.minValue < 0) {
3374                        mOrientationScale = -M_PI_2 / mRawPointerAxes.orientation.minValue;
3375                    } else {
3376                        mOrientationScale = 0;
3377                    }
3378                }
3379            }
3380
3381            mOrientedRanges.haveOrientation = true;
3382
3383            mOrientedRanges.orientation.axis = AMOTION_EVENT_AXIS_ORIENTATION;
3384            mOrientedRanges.orientation.source = mSource;
3385            mOrientedRanges.orientation.min = -M_PI_2;
3386            mOrientedRanges.orientation.max = M_PI_2;
3387            mOrientedRanges.orientation.flat = 0;
3388            mOrientedRanges.orientation.fuzz = 0;
3389            mOrientedRanges.orientation.resolution = 0;
3390        }
3391
3392        // Distance
3393        mDistanceScale = 0;
3394        if (mCalibration.distanceCalibration != Calibration::DISTANCE_CALIBRATION_NONE) {
3395            if (mCalibration.distanceCalibration
3396                    == Calibration::DISTANCE_CALIBRATION_SCALED) {
3397                if (mCalibration.haveDistanceScale) {
3398                    mDistanceScale = mCalibration.distanceScale;
3399                } else {
3400                    mDistanceScale = 1.0f;
3401                }
3402            }
3403
3404            mOrientedRanges.haveDistance = true;
3405
3406            mOrientedRanges.distance.axis = AMOTION_EVENT_AXIS_DISTANCE;
3407            mOrientedRanges.distance.source = mSource;
3408            mOrientedRanges.distance.min =
3409                    mRawPointerAxes.distance.minValue * mDistanceScale;
3410            mOrientedRanges.distance.max =
3411                    mRawPointerAxes.distance.maxValue * mDistanceScale;
3412            mOrientedRanges.distance.flat = 0;
3413            mOrientedRanges.distance.fuzz =
3414                    mRawPointerAxes.distance.fuzz * mDistanceScale;
3415            mOrientedRanges.distance.resolution = 0;
3416        }
3417
3418        // Compute oriented precision, scales and ranges.
3419        // Note that the maximum value reported is an inclusive maximum value so it is one
3420        // unit less than the total width or height of surface.
3421        switch (mSurfaceOrientation) {
3422        case DISPLAY_ORIENTATION_90:
3423        case DISPLAY_ORIENTATION_270:
3424            mOrientedXPrecision = mYPrecision;
3425            mOrientedYPrecision = mXPrecision;
3426
3427            mOrientedRanges.x.min = mYTranslate;
3428            mOrientedRanges.x.max = mSurfaceHeight + mYTranslate - 1;
3429            mOrientedRanges.x.flat = 0;
3430            mOrientedRanges.x.fuzz = 0;
3431            mOrientedRanges.x.resolution = mRawPointerAxes.y.resolution * mYScale;
3432
3433            mOrientedRanges.y.min = mXTranslate;
3434            mOrientedRanges.y.max = mSurfaceWidth + mXTranslate - 1;
3435            mOrientedRanges.y.flat = 0;
3436            mOrientedRanges.y.fuzz = 0;
3437            mOrientedRanges.y.resolution = mRawPointerAxes.x.resolution * mXScale;
3438            break;
3439
3440        default:
3441            mOrientedXPrecision = mXPrecision;
3442            mOrientedYPrecision = mYPrecision;
3443
3444            mOrientedRanges.x.min = mXTranslate;
3445            mOrientedRanges.x.max = mSurfaceWidth + mXTranslate - 1;
3446            mOrientedRanges.x.flat = 0;
3447            mOrientedRanges.x.fuzz = 0;
3448            mOrientedRanges.x.resolution = mRawPointerAxes.x.resolution * mXScale;
3449
3450            mOrientedRanges.y.min = mYTranslate;
3451            mOrientedRanges.y.max = mSurfaceHeight + mYTranslate - 1;
3452            mOrientedRanges.y.flat = 0;
3453            mOrientedRanges.y.fuzz = 0;
3454            mOrientedRanges.y.resolution = mRawPointerAxes.y.resolution * mYScale;
3455            break;
3456        }
3457
3458        // Location
3459        updateAffineTransformation();
3460
3461        if (mDeviceMode == DEVICE_MODE_POINTER) {
3462            // Compute pointer gesture detection parameters.
3463            float rawDiagonal = hypotf(rawWidth, rawHeight);
3464            float displayDiagonal = hypotf(mSurfaceWidth, mSurfaceHeight);
3465
3466            // Scale movements such that one whole swipe of the touch pad covers a
3467            // given area relative to the diagonal size of the display when no acceleration
3468            // is applied.
3469            // Assume that the touch pad has a square aspect ratio such that movements in
3470            // X and Y of the same number of raw units cover the same physical distance.
3471            mPointerXMovementScale = mConfig.pointerGestureMovementSpeedRatio
3472                    * displayDiagonal / rawDiagonal;
3473            mPointerYMovementScale = mPointerXMovementScale;
3474
3475            // Scale zooms to cover a smaller range of the display than movements do.
3476            // This value determines the area around the pointer that is affected by freeform
3477            // pointer gestures.
3478            mPointerXZoomScale = mConfig.pointerGestureZoomSpeedRatio
3479                    * displayDiagonal / rawDiagonal;
3480            mPointerYZoomScale = mPointerXZoomScale;
3481
3482            // Max width between pointers to detect a swipe gesture is more than some fraction
3483            // of the diagonal axis of the touch pad.  Touches that are wider than this are
3484            // translated into freeform gestures.
3485            mPointerGestureMaxSwipeWidth =
3486                    mConfig.pointerGestureSwipeMaxWidthRatio * rawDiagonal;
3487
3488            // Abort current pointer usages because the state has changed.
3489            abortPointerUsage(when, 0 /*policyFlags*/);
3490        }
3491
3492        // Inform the dispatcher about the changes.
3493        *outResetNeeded = true;
3494        bumpGeneration();
3495    }
3496}
3497
3498void TouchInputMapper::dumpSurface(String8& dump) {
3499    dump.appendFormat(INDENT3 "Viewport: displayId=%d, orientation=%d, "
3500            "logicalFrame=[%d, %d, %d, %d], "
3501            "physicalFrame=[%d, %d, %d, %d], "
3502            "deviceSize=[%d, %d]\n",
3503            mViewport.displayId, mViewport.orientation,
3504            mViewport.logicalLeft, mViewport.logicalTop,
3505            mViewport.logicalRight, mViewport.logicalBottom,
3506            mViewport.physicalLeft, mViewport.physicalTop,
3507            mViewport.physicalRight, mViewport.physicalBottom,
3508            mViewport.deviceWidth, mViewport.deviceHeight);
3509
3510    dump.appendFormat(INDENT3 "SurfaceWidth: %dpx\n", mSurfaceWidth);
3511    dump.appendFormat(INDENT3 "SurfaceHeight: %dpx\n", mSurfaceHeight);
3512    dump.appendFormat(INDENT3 "SurfaceLeft: %d\n", mSurfaceLeft);
3513    dump.appendFormat(INDENT3 "SurfaceTop: %d\n", mSurfaceTop);
3514    dump.appendFormat(INDENT3 "SurfaceOrientation: %d\n", mSurfaceOrientation);
3515}
3516
3517void TouchInputMapper::configureVirtualKeys() {
3518    Vector<VirtualKeyDefinition> virtualKeyDefinitions;
3519    getEventHub()->getVirtualKeyDefinitions(getDeviceId(), virtualKeyDefinitions);
3520
3521    mVirtualKeys.clear();
3522
3523    if (virtualKeyDefinitions.size() == 0) {
3524        return;
3525    }
3526
3527    mVirtualKeys.setCapacity(virtualKeyDefinitions.size());
3528
3529    int32_t touchScreenLeft = mRawPointerAxes.x.minValue;
3530    int32_t touchScreenTop = mRawPointerAxes.y.minValue;
3531    int32_t touchScreenWidth = mRawPointerAxes.x.maxValue - mRawPointerAxes.x.minValue + 1;
3532    int32_t touchScreenHeight = mRawPointerAxes.y.maxValue - mRawPointerAxes.y.minValue + 1;
3533
3534    for (size_t i = 0; i < virtualKeyDefinitions.size(); i++) {
3535        const VirtualKeyDefinition& virtualKeyDefinition =
3536                virtualKeyDefinitions[i];
3537
3538        mVirtualKeys.add();
3539        VirtualKey& virtualKey = mVirtualKeys.editTop();
3540
3541        virtualKey.scanCode = virtualKeyDefinition.scanCode;
3542        int32_t keyCode;
3543        uint32_t flags;
3544        if (getEventHub()->mapKey(getDeviceId(), virtualKey.scanCode, 0, &keyCode, &flags)) {
3545            ALOGW(INDENT "VirtualKey %d: could not obtain key code, ignoring",
3546                    virtualKey.scanCode);
3547            mVirtualKeys.pop(); // drop the key
3548            continue;
3549        }
3550
3551        virtualKey.keyCode = keyCode;
3552        virtualKey.flags = flags;
3553
3554        // convert the key definition's display coordinates into touch coordinates for a hit box
3555        int32_t halfWidth = virtualKeyDefinition.width / 2;
3556        int32_t halfHeight = virtualKeyDefinition.height / 2;
3557
3558        virtualKey.hitLeft = (virtualKeyDefinition.centerX - halfWidth)
3559                * touchScreenWidth / mSurfaceWidth + touchScreenLeft;
3560        virtualKey.hitRight= (virtualKeyDefinition.centerX + halfWidth)
3561                * touchScreenWidth / mSurfaceWidth + touchScreenLeft;
3562        virtualKey.hitTop = (virtualKeyDefinition.centerY - halfHeight)
3563                * touchScreenHeight / mSurfaceHeight + touchScreenTop;
3564        virtualKey.hitBottom = (virtualKeyDefinition.centerY + halfHeight)
3565                * touchScreenHeight / mSurfaceHeight + touchScreenTop;
3566    }
3567}
3568
3569void TouchInputMapper::dumpVirtualKeys(String8& dump) {
3570    if (!mVirtualKeys.isEmpty()) {
3571        dump.append(INDENT3 "Virtual Keys:\n");
3572
3573        for (size_t i = 0; i < mVirtualKeys.size(); i++) {
3574            const VirtualKey& virtualKey = mVirtualKeys.itemAt(i);
3575            dump.appendFormat(INDENT4 "%zu: scanCode=%d, keyCode=%d, "
3576                    "hitLeft=%d, hitRight=%d, hitTop=%d, hitBottom=%d\n",
3577                    i, virtualKey.scanCode, virtualKey.keyCode,
3578                    virtualKey.hitLeft, virtualKey.hitRight,
3579                    virtualKey.hitTop, virtualKey.hitBottom);
3580        }
3581    }
3582}
3583
3584void TouchInputMapper::parseCalibration() {
3585    const PropertyMap& in = getDevice()->getConfiguration();
3586    Calibration& out = mCalibration;
3587
3588    // Size
3589    out.sizeCalibration = Calibration::SIZE_CALIBRATION_DEFAULT;
3590    String8 sizeCalibrationString;
3591    if (in.tryGetProperty(String8("touch.size.calibration"), sizeCalibrationString)) {
3592        if (sizeCalibrationString == "none") {
3593            out.sizeCalibration = Calibration::SIZE_CALIBRATION_NONE;
3594        } else if (sizeCalibrationString == "geometric") {
3595            out.sizeCalibration = Calibration::SIZE_CALIBRATION_GEOMETRIC;
3596        } else if (sizeCalibrationString == "diameter") {
3597            out.sizeCalibration = Calibration::SIZE_CALIBRATION_DIAMETER;
3598        } else if (sizeCalibrationString == "box") {
3599            out.sizeCalibration = Calibration::SIZE_CALIBRATION_BOX;
3600        } else if (sizeCalibrationString == "area") {
3601            out.sizeCalibration = Calibration::SIZE_CALIBRATION_AREA;
3602        } else if (sizeCalibrationString != "default") {
3603            ALOGW("Invalid value for touch.size.calibration: '%s'",
3604                    sizeCalibrationString.string());
3605        }
3606    }
3607
3608    out.haveSizeScale = in.tryGetProperty(String8("touch.size.scale"),
3609            out.sizeScale);
3610    out.haveSizeBias = in.tryGetProperty(String8("touch.size.bias"),
3611            out.sizeBias);
3612    out.haveSizeIsSummed = in.tryGetProperty(String8("touch.size.isSummed"),
3613            out.sizeIsSummed);
3614
3615    // Pressure
3616    out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_DEFAULT;
3617    String8 pressureCalibrationString;
3618    if (in.tryGetProperty(String8("touch.pressure.calibration"), pressureCalibrationString)) {
3619        if (pressureCalibrationString == "none") {
3620            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_NONE;
3621        } else if (pressureCalibrationString == "physical") {
3622            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_PHYSICAL;
3623        } else if (pressureCalibrationString == "amplitude") {
3624            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_AMPLITUDE;
3625        } else if (pressureCalibrationString != "default") {
3626            ALOGW("Invalid value for touch.pressure.calibration: '%s'",
3627                    pressureCalibrationString.string());
3628        }
3629    }
3630
3631    out.havePressureScale = in.tryGetProperty(String8("touch.pressure.scale"),
3632            out.pressureScale);
3633
3634    // Orientation
3635    out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_DEFAULT;
3636    String8 orientationCalibrationString;
3637    if (in.tryGetProperty(String8("touch.orientation.calibration"), orientationCalibrationString)) {
3638        if (orientationCalibrationString == "none") {
3639            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
3640        } else if (orientationCalibrationString == "interpolated") {
3641            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
3642        } else if (orientationCalibrationString == "vector") {
3643            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_VECTOR;
3644        } else if (orientationCalibrationString != "default") {
3645            ALOGW("Invalid value for touch.orientation.calibration: '%s'",
3646                    orientationCalibrationString.string());
3647        }
3648    }
3649
3650    // Distance
3651    out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_DEFAULT;
3652    String8 distanceCalibrationString;
3653    if (in.tryGetProperty(String8("touch.distance.calibration"), distanceCalibrationString)) {
3654        if (distanceCalibrationString == "none") {
3655            out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_NONE;
3656        } else if (distanceCalibrationString == "scaled") {
3657            out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_SCALED;
3658        } else if (distanceCalibrationString != "default") {
3659            ALOGW("Invalid value for touch.distance.calibration: '%s'",
3660                    distanceCalibrationString.string());
3661        }
3662    }
3663
3664    out.haveDistanceScale = in.tryGetProperty(String8("touch.distance.scale"),
3665            out.distanceScale);
3666
3667    out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_DEFAULT;
3668    String8 coverageCalibrationString;
3669    if (in.tryGetProperty(String8("touch.coverage.calibration"), coverageCalibrationString)) {
3670        if (coverageCalibrationString == "none") {
3671            out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_NONE;
3672        } else if (coverageCalibrationString == "box") {
3673            out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_BOX;
3674        } else if (coverageCalibrationString != "default") {
3675            ALOGW("Invalid value for touch.coverage.calibration: '%s'",
3676                    coverageCalibrationString.string());
3677        }
3678    }
3679}
3680
3681void TouchInputMapper::resolveCalibration() {
3682    // Size
3683    if (mRawPointerAxes.touchMajor.valid || mRawPointerAxes.toolMajor.valid) {
3684        if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_DEFAULT) {
3685            mCalibration.sizeCalibration = Calibration::SIZE_CALIBRATION_GEOMETRIC;
3686        }
3687    } else {
3688        mCalibration.sizeCalibration = Calibration::SIZE_CALIBRATION_NONE;
3689    }
3690
3691    // Pressure
3692    if (mRawPointerAxes.pressure.valid) {
3693        if (mCalibration.pressureCalibration == Calibration::PRESSURE_CALIBRATION_DEFAULT) {
3694            mCalibration.pressureCalibration = Calibration::PRESSURE_CALIBRATION_PHYSICAL;
3695        }
3696    } else {
3697        mCalibration.pressureCalibration = Calibration::PRESSURE_CALIBRATION_NONE;
3698    }
3699
3700    // Orientation
3701    if (mRawPointerAxes.orientation.valid) {
3702        if (mCalibration.orientationCalibration == Calibration::ORIENTATION_CALIBRATION_DEFAULT) {
3703            mCalibration.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
3704        }
3705    } else {
3706        mCalibration.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
3707    }
3708
3709    // Distance
3710    if (mRawPointerAxes.distance.valid) {
3711        if (mCalibration.distanceCalibration == Calibration::DISTANCE_CALIBRATION_DEFAULT) {
3712            mCalibration.distanceCalibration = Calibration::DISTANCE_CALIBRATION_SCALED;
3713        }
3714    } else {
3715        mCalibration.distanceCalibration = Calibration::DISTANCE_CALIBRATION_NONE;
3716    }
3717
3718    // Coverage
3719    if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_DEFAULT) {
3720        mCalibration.coverageCalibration = Calibration::COVERAGE_CALIBRATION_NONE;
3721    }
3722}
3723
3724void TouchInputMapper::dumpCalibration(String8& dump) {
3725    dump.append(INDENT3 "Calibration:\n");
3726
3727    // Size
3728    switch (mCalibration.sizeCalibration) {
3729    case Calibration::SIZE_CALIBRATION_NONE:
3730        dump.append(INDENT4 "touch.size.calibration: none\n");
3731        break;
3732    case Calibration::SIZE_CALIBRATION_GEOMETRIC:
3733        dump.append(INDENT4 "touch.size.calibration: geometric\n");
3734        break;
3735    case Calibration::SIZE_CALIBRATION_DIAMETER:
3736        dump.append(INDENT4 "touch.size.calibration: diameter\n");
3737        break;
3738    case Calibration::SIZE_CALIBRATION_BOX:
3739        dump.append(INDENT4 "touch.size.calibration: box\n");
3740        break;
3741    case Calibration::SIZE_CALIBRATION_AREA:
3742        dump.append(INDENT4 "touch.size.calibration: area\n");
3743        break;
3744    default:
3745        ALOG_ASSERT(false);
3746    }
3747
3748    if (mCalibration.haveSizeScale) {
3749        dump.appendFormat(INDENT4 "touch.size.scale: %0.3f\n",
3750                mCalibration.sizeScale);
3751    }
3752
3753    if (mCalibration.haveSizeBias) {
3754        dump.appendFormat(INDENT4 "touch.size.bias: %0.3f\n",
3755                mCalibration.sizeBias);
3756    }
3757
3758    if (mCalibration.haveSizeIsSummed) {
3759        dump.appendFormat(INDENT4 "touch.size.isSummed: %s\n",
3760                toString(mCalibration.sizeIsSummed));
3761    }
3762
3763    // Pressure
3764    switch (mCalibration.pressureCalibration) {
3765    case Calibration::PRESSURE_CALIBRATION_NONE:
3766        dump.append(INDENT4 "touch.pressure.calibration: none\n");
3767        break;
3768    case Calibration::PRESSURE_CALIBRATION_PHYSICAL:
3769        dump.append(INDENT4 "touch.pressure.calibration: physical\n");
3770        break;
3771    case Calibration::PRESSURE_CALIBRATION_AMPLITUDE:
3772        dump.append(INDENT4 "touch.pressure.calibration: amplitude\n");
3773        break;
3774    default:
3775        ALOG_ASSERT(false);
3776    }
3777
3778    if (mCalibration.havePressureScale) {
3779        dump.appendFormat(INDENT4 "touch.pressure.scale: %0.3f\n",
3780                mCalibration.pressureScale);
3781    }
3782
3783    // Orientation
3784    switch (mCalibration.orientationCalibration) {
3785    case Calibration::ORIENTATION_CALIBRATION_NONE:
3786        dump.append(INDENT4 "touch.orientation.calibration: none\n");
3787        break;
3788    case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
3789        dump.append(INDENT4 "touch.orientation.calibration: interpolated\n");
3790        break;
3791    case Calibration::ORIENTATION_CALIBRATION_VECTOR:
3792        dump.append(INDENT4 "touch.orientation.calibration: vector\n");
3793        break;
3794    default:
3795        ALOG_ASSERT(false);
3796    }
3797
3798    // Distance
3799    switch (mCalibration.distanceCalibration) {
3800    case Calibration::DISTANCE_CALIBRATION_NONE:
3801        dump.append(INDENT4 "touch.distance.calibration: none\n");
3802        break;
3803    case Calibration::DISTANCE_CALIBRATION_SCALED:
3804        dump.append(INDENT4 "touch.distance.calibration: scaled\n");
3805        break;
3806    default:
3807        ALOG_ASSERT(false);
3808    }
3809
3810    if (mCalibration.haveDistanceScale) {
3811        dump.appendFormat(INDENT4 "touch.distance.scale: %0.3f\n",
3812                mCalibration.distanceScale);
3813    }
3814
3815    switch (mCalibration.coverageCalibration) {
3816    case Calibration::COVERAGE_CALIBRATION_NONE:
3817        dump.append(INDENT4 "touch.coverage.calibration: none\n");
3818        break;
3819    case Calibration::COVERAGE_CALIBRATION_BOX:
3820        dump.append(INDENT4 "touch.coverage.calibration: box\n");
3821        break;
3822    default:
3823        ALOG_ASSERT(false);
3824    }
3825}
3826
3827void TouchInputMapper::dumpAffineTransformation(String8& dump) {
3828    dump.append(INDENT3 "Affine Transformation:\n");
3829
3830    dump.appendFormat(INDENT4 "X scale: %0.3f\n", mAffineTransform.x_scale);
3831    dump.appendFormat(INDENT4 "X ymix: %0.3f\n", mAffineTransform.x_ymix);
3832    dump.appendFormat(INDENT4 "X offset: %0.3f\n", mAffineTransform.x_offset);
3833    dump.appendFormat(INDENT4 "Y xmix: %0.3f\n", mAffineTransform.y_xmix);
3834    dump.appendFormat(INDENT4 "Y scale: %0.3f\n", mAffineTransform.y_scale);
3835    dump.appendFormat(INDENT4 "Y offset: %0.3f\n", mAffineTransform.y_offset);
3836}
3837
3838void TouchInputMapper::updateAffineTransformation() {
3839    mAffineTransform = getPolicy()->getTouchAffineTransformation(mDevice->getDescriptor(),
3840            mSurfaceOrientation);
3841}
3842
3843void TouchInputMapper::reset(nsecs_t when) {
3844    mCursorButtonAccumulator.reset(getDevice());
3845    mCursorScrollAccumulator.reset(getDevice());
3846    mTouchButtonAccumulator.reset(getDevice());
3847
3848    mPointerVelocityControl.reset();
3849    mWheelXVelocityControl.reset();
3850    mWheelYVelocityControl.reset();
3851
3852    mRawStatesPending.clear();
3853    mCurrentRawState.clear();
3854    mCurrentCookedState.clear();
3855    mLastRawState.clear();
3856    mLastCookedState.clear();
3857    mPointerUsage = POINTER_USAGE_NONE;
3858    mSentHoverEnter = false;
3859    mHavePointerIds = false;
3860    mDownTime = 0;
3861
3862    mCurrentVirtualKey.down = false;
3863
3864    mPointerGesture.reset();
3865    mPointerSimple.reset();
3866    resetExternalStylus();
3867
3868    if (mPointerController != NULL) {
3869        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
3870        mPointerController->clearSpots();
3871    }
3872
3873    InputMapper::reset(when);
3874}
3875
3876void TouchInputMapper::resetExternalStylus() {
3877    mExternalStylusState.clear();
3878    mExternalStylusId = -1;
3879    mExternalStylusFusionTimeout = LLONG_MAX;
3880    mExternalStylusDataPending = false;
3881}
3882
3883void TouchInputMapper::clearStylusDataPendingFlags() {
3884    mExternalStylusDataPending = false;
3885    mExternalStylusFusionTimeout = LLONG_MAX;
3886}
3887
3888void TouchInputMapper::process(const RawEvent* rawEvent) {
3889    mCursorButtonAccumulator.process(rawEvent);
3890    mCursorScrollAccumulator.process(rawEvent);
3891    mTouchButtonAccumulator.process(rawEvent);
3892
3893    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
3894        sync(rawEvent->when);
3895    }
3896}
3897
3898void TouchInputMapper::sync(nsecs_t when) {
3899    const RawState* last = mRawStatesPending.isEmpty() ?
3900            &mCurrentRawState : &mRawStatesPending.top();
3901
3902    // Push a new state.
3903    mRawStatesPending.push();
3904    RawState* next = &mRawStatesPending.editTop();
3905    next->clear();
3906    next->when = when;
3907
3908    // Sync button state.
3909    next->buttonState = mTouchButtonAccumulator.getButtonState()
3910            | mCursorButtonAccumulator.getButtonState();
3911
3912    // Sync scroll
3913    next->rawVScroll = mCursorScrollAccumulator.getRelativeVWheel();
3914    next->rawHScroll = mCursorScrollAccumulator.getRelativeHWheel();
3915    mCursorScrollAccumulator.finishSync();
3916
3917    // Sync touch
3918    syncTouch(when, next);
3919
3920    // Assign pointer ids.
3921    if (!mHavePointerIds) {
3922        assignPointerIds(last, next);
3923    }
3924
3925#if DEBUG_RAW_EVENTS
3926    ALOGD("syncTouch: pointerCount %d -> %d, touching ids 0x%08x -> 0x%08x, "
3927            "hovering ids 0x%08x -> 0x%08x",
3928            last->rawPointerData.pointerCount,
3929            next->rawPointerData.pointerCount,
3930            last->rawPointerData.touchingIdBits.value,
3931            next->rawPointerData.touchingIdBits.value,
3932            last->rawPointerData.hoveringIdBits.value,
3933            next->rawPointerData.hoveringIdBits.value);
3934#endif
3935
3936    processRawTouches(false /*timeout*/);
3937}
3938
3939void TouchInputMapper::processRawTouches(bool timeout) {
3940    if (mDeviceMode == DEVICE_MODE_DISABLED) {
3941        // Drop all input if the device is disabled.
3942        mCurrentRawState.clear();
3943        mRawStatesPending.clear();
3944        return;
3945    }
3946
3947    // Drain any pending touch states. The invariant here is that the mCurrentRawState is always
3948    // valid and must go through the full cook and dispatch cycle. This ensures that anything
3949    // touching the current state will only observe the events that have been dispatched to the
3950    // rest of the pipeline.
3951    const size_t N = mRawStatesPending.size();
3952    size_t count;
3953    for(count = 0; count < N; count++) {
3954        const RawState& next = mRawStatesPending[count];
3955
3956        // A failure to assign the stylus id means that we're waiting on stylus data
3957        // and so should defer the rest of the pipeline.
3958        if (assignExternalStylusId(next, timeout)) {
3959            break;
3960        }
3961
3962        // All ready to go.
3963        clearStylusDataPendingFlags();
3964        mCurrentRawState.copyFrom(next);
3965        if (mCurrentRawState.when < mLastRawState.when) {
3966            mCurrentRawState.when = mLastRawState.when;
3967        }
3968        cookAndDispatch(mCurrentRawState.when);
3969    }
3970    if (count != 0) {
3971        mRawStatesPending.removeItemsAt(0, count);
3972    }
3973
3974    if (mExternalStylusDataPending) {
3975        if (timeout) {
3976            nsecs_t when = mExternalStylusFusionTimeout - STYLUS_DATA_LATENCY;
3977            clearStylusDataPendingFlags();
3978            mCurrentRawState.copyFrom(mLastRawState);
3979#if DEBUG_STYLUS_FUSION
3980            ALOGD("Timeout expired, synthesizing event with new stylus data");
3981#endif
3982            cookAndDispatch(when);
3983        } else if (mExternalStylusFusionTimeout == LLONG_MAX) {
3984            mExternalStylusFusionTimeout = mExternalStylusState.when + TOUCH_DATA_TIMEOUT;
3985            getContext()->requestTimeoutAtTime(mExternalStylusFusionTimeout);
3986        }
3987    }
3988}
3989
3990void TouchInputMapper::cookAndDispatch(nsecs_t when) {
3991    // Always start with a clean state.
3992    mCurrentCookedState.clear();
3993
3994    // Apply stylus buttons to current raw state.
3995    applyExternalStylusButtonState(when);
3996
3997    // Handle policy on initial down or hover events.
3998    bool initialDown = mLastRawState.rawPointerData.pointerCount == 0
3999            && mCurrentRawState.rawPointerData.pointerCount != 0;
4000
4001    uint32_t policyFlags = 0;
4002    bool buttonsPressed = mCurrentRawState.buttonState & ~mLastRawState.buttonState;
4003    if (initialDown || buttonsPressed) {
4004        // If this is a touch screen, hide the pointer on an initial down.
4005        if (mDeviceMode == DEVICE_MODE_DIRECT) {
4006            getContext()->fadePointer();
4007        }
4008
4009        if (mParameters.wake) {
4010            policyFlags |= POLICY_FLAG_WAKE;
4011        }
4012    }
4013
4014    // Consume raw off-screen touches before cooking pointer data.
4015    // If touches are consumed, subsequent code will not receive any pointer data.
4016    if (consumeRawTouches(when, policyFlags)) {
4017        mCurrentRawState.rawPointerData.clear();
4018    }
4019
4020    // Cook pointer data.  This call populates the mCurrentCookedState.cookedPointerData structure
4021    // with cooked pointer data that has the same ids and indices as the raw data.
4022    // The following code can use either the raw or cooked data, as needed.
4023    cookPointerData();
4024
4025    // Apply stylus pressure to current cooked state.
4026    applyExternalStylusTouchState(when);
4027
4028    // Synthesize key down from raw buttons if needed.
4029    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
4030            policyFlags, mLastCookedState.buttonState, mCurrentCookedState.buttonState);
4031
4032    // Dispatch the touches either directly or by translation through a pointer on screen.
4033    if (mDeviceMode == DEVICE_MODE_POINTER) {
4034        for (BitSet32 idBits(mCurrentRawState.rawPointerData.touchingIdBits);
4035                !idBits.isEmpty(); ) {
4036            uint32_t id = idBits.clearFirstMarkedBit();
4037            const RawPointerData::Pointer& pointer =
4038                    mCurrentRawState.rawPointerData.pointerForId(id);
4039            if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_STYLUS
4040                    || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_ERASER) {
4041                mCurrentCookedState.stylusIdBits.markBit(id);
4042            } else if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_FINGER
4043                    || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
4044                mCurrentCookedState.fingerIdBits.markBit(id);
4045            } else if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_MOUSE) {
4046                mCurrentCookedState.mouseIdBits.markBit(id);
4047            }
4048        }
4049        for (BitSet32 idBits(mCurrentRawState.rawPointerData.hoveringIdBits);
4050                !idBits.isEmpty(); ) {
4051            uint32_t id = idBits.clearFirstMarkedBit();
4052            const RawPointerData::Pointer& pointer =
4053                    mCurrentRawState.rawPointerData.pointerForId(id);
4054            if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_STYLUS
4055                    || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_ERASER) {
4056                mCurrentCookedState.stylusIdBits.markBit(id);
4057            }
4058        }
4059
4060        // Stylus takes precedence over all tools, then mouse, then finger.
4061        PointerUsage pointerUsage = mPointerUsage;
4062        if (!mCurrentCookedState.stylusIdBits.isEmpty()) {
4063            mCurrentCookedState.mouseIdBits.clear();
4064            mCurrentCookedState.fingerIdBits.clear();
4065            pointerUsage = POINTER_USAGE_STYLUS;
4066        } else if (!mCurrentCookedState.mouseIdBits.isEmpty()) {
4067            mCurrentCookedState.fingerIdBits.clear();
4068            pointerUsage = POINTER_USAGE_MOUSE;
4069        } else if (!mCurrentCookedState.fingerIdBits.isEmpty() ||
4070                isPointerDown(mCurrentRawState.buttonState)) {
4071            pointerUsage = POINTER_USAGE_GESTURES;
4072        }
4073
4074        dispatchPointerUsage(when, policyFlags, pointerUsage);
4075    } else {
4076        if (mDeviceMode == DEVICE_MODE_DIRECT
4077                && mConfig.showTouches && mPointerController != NULL) {
4078            mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_SPOT);
4079            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
4080
4081            mPointerController->setButtonState(mCurrentRawState.buttonState);
4082            mPointerController->setSpots(mCurrentCookedState.cookedPointerData.pointerCoords,
4083                    mCurrentCookedState.cookedPointerData.idToIndex,
4084                    mCurrentCookedState.cookedPointerData.touchingIdBits);
4085        }
4086
4087        dispatchButtonRelease(when, policyFlags);
4088        dispatchHoverExit(when, policyFlags);
4089        dispatchTouches(when, policyFlags);
4090        dispatchHoverEnterAndMove(when, policyFlags);
4091        dispatchButtonPress(when, policyFlags);
4092    }
4093
4094    // Synthesize key up from raw buttons if needed.
4095    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
4096            policyFlags, mLastCookedState.buttonState, mCurrentCookedState.buttonState);
4097
4098    // Clear some transient state.
4099    mCurrentRawState.rawVScroll = 0;
4100    mCurrentRawState.rawHScroll = 0;
4101
4102    // Copy current touch to last touch in preparation for the next cycle.
4103    mLastRawState.copyFrom(mCurrentRawState);
4104    mLastCookedState.copyFrom(mCurrentCookedState);
4105}
4106
4107void TouchInputMapper::applyExternalStylusButtonState(nsecs_t when) {
4108    if (mDeviceMode == DEVICE_MODE_DIRECT && hasExternalStylus() && mExternalStylusId != -1) {
4109        mCurrentRawState.buttonState |= mExternalStylusState.buttons;
4110    }
4111}
4112
4113void TouchInputMapper::applyExternalStylusTouchState(nsecs_t when) {
4114    CookedPointerData& currentPointerData = mCurrentCookedState.cookedPointerData;
4115    const CookedPointerData& lastPointerData = mLastCookedState.cookedPointerData;
4116
4117    if (mExternalStylusId != -1 && currentPointerData.isTouching(mExternalStylusId)) {
4118        float pressure = mExternalStylusState.pressure;
4119        if (pressure == 0.0f && lastPointerData.isTouching(mExternalStylusId)) {
4120            const PointerCoords& coords = lastPointerData.pointerCoordsForId(mExternalStylusId);
4121            pressure = coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE);
4122        }
4123        PointerCoords& coords = currentPointerData.editPointerCoordsWithId(mExternalStylusId);
4124        coords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, pressure);
4125
4126        PointerProperties& properties =
4127                currentPointerData.editPointerPropertiesWithId(mExternalStylusId);
4128        if (mExternalStylusState.toolType != AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
4129            properties.toolType = mExternalStylusState.toolType;
4130        }
4131    }
4132}
4133
4134bool TouchInputMapper::assignExternalStylusId(const RawState& state, bool timeout) {
4135    if (mDeviceMode != DEVICE_MODE_DIRECT || !hasExternalStylus()) {
4136        return false;
4137    }
4138
4139    const bool initialDown = mLastRawState.rawPointerData.pointerCount == 0
4140            && state.rawPointerData.pointerCount != 0;
4141    if (initialDown) {
4142        if (mExternalStylusState.pressure != 0.0f) {
4143#if DEBUG_STYLUS_FUSION
4144            ALOGD("Have both stylus and touch data, beginning fusion");
4145#endif
4146            mExternalStylusId = state.rawPointerData.touchingIdBits.firstMarkedBit();
4147        } else if (timeout) {
4148#if DEBUG_STYLUS_FUSION
4149            ALOGD("Timeout expired, assuming touch is not a stylus.");
4150#endif
4151            resetExternalStylus();
4152        } else {
4153            if (mExternalStylusFusionTimeout == LLONG_MAX) {
4154                mExternalStylusFusionTimeout = state.when + EXTERNAL_STYLUS_DATA_TIMEOUT;
4155            }
4156#if DEBUG_STYLUS_FUSION
4157            ALOGD("No stylus data but stylus is connected, requesting timeout "
4158                    "(%" PRId64 "ms)", mExternalStylusFusionTimeout);
4159#endif
4160            getContext()->requestTimeoutAtTime(mExternalStylusFusionTimeout);
4161            return true;
4162        }
4163    }
4164
4165    // Check if the stylus pointer has gone up.
4166    if (mExternalStylusId != -1 &&
4167            !state.rawPointerData.touchingIdBits.hasBit(mExternalStylusId)) {
4168#if DEBUG_STYLUS_FUSION
4169            ALOGD("Stylus pointer is going up");
4170#endif
4171        mExternalStylusId = -1;
4172    }
4173
4174    return false;
4175}
4176
4177void TouchInputMapper::timeoutExpired(nsecs_t when) {
4178    if (mDeviceMode == DEVICE_MODE_POINTER) {
4179        if (mPointerUsage == POINTER_USAGE_GESTURES) {
4180            dispatchPointerGestures(when, 0 /*policyFlags*/, true /*isTimeout*/);
4181        }
4182    } else if (mDeviceMode == DEVICE_MODE_DIRECT) {
4183        if (mExternalStylusFusionTimeout < when) {
4184            processRawTouches(true /*timeout*/);
4185        } else if (mExternalStylusFusionTimeout != LLONG_MAX) {
4186            getContext()->requestTimeoutAtTime(mExternalStylusFusionTimeout);
4187        }
4188    }
4189}
4190
4191void TouchInputMapper::updateExternalStylusState(const StylusState& state) {
4192    mExternalStylusState.copyFrom(state);
4193    if (mExternalStylusId != -1 || mExternalStylusFusionTimeout != LLONG_MAX) {
4194        // We're either in the middle of a fused stream of data or we're waiting on data before
4195        // dispatching the initial down, so go ahead and dispatch now that we have fresh stylus
4196        // data.
4197        mExternalStylusDataPending = true;
4198        processRawTouches(false /*timeout*/);
4199    }
4200}
4201
4202bool TouchInputMapper::consumeRawTouches(nsecs_t when, uint32_t policyFlags) {
4203    // Check for release of a virtual key.
4204    if (mCurrentVirtualKey.down) {
4205        if (mCurrentRawState.rawPointerData.touchingIdBits.isEmpty()) {
4206            // Pointer went up while virtual key was down.
4207            mCurrentVirtualKey.down = false;
4208            if (!mCurrentVirtualKey.ignored) {
4209#if DEBUG_VIRTUAL_KEYS
4210                ALOGD("VirtualKeys: Generating key up: keyCode=%d, scanCode=%d",
4211                        mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
4212#endif
4213                dispatchVirtualKey(when, policyFlags,
4214                        AKEY_EVENT_ACTION_UP,
4215                        AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
4216            }
4217            return true;
4218        }
4219
4220        if (mCurrentRawState.rawPointerData.touchingIdBits.count() == 1) {
4221            uint32_t id = mCurrentRawState.rawPointerData.touchingIdBits.firstMarkedBit();
4222            const RawPointerData::Pointer& pointer =
4223                    mCurrentRawState.rawPointerData.pointerForId(id);
4224            const VirtualKey* virtualKey = findVirtualKeyHit(pointer.x, pointer.y);
4225            if (virtualKey && virtualKey->keyCode == mCurrentVirtualKey.keyCode) {
4226                // Pointer is still within the space of the virtual key.
4227                return true;
4228            }
4229        }
4230
4231        // Pointer left virtual key area or another pointer also went down.
4232        // Send key cancellation but do not consume the touch yet.
4233        // This is useful when the user swipes through from the virtual key area
4234        // into the main display surface.
4235        mCurrentVirtualKey.down = false;
4236        if (!mCurrentVirtualKey.ignored) {
4237#if DEBUG_VIRTUAL_KEYS
4238            ALOGD("VirtualKeys: Canceling key: keyCode=%d, scanCode=%d",
4239                    mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
4240#endif
4241            dispatchVirtualKey(when, policyFlags,
4242                    AKEY_EVENT_ACTION_UP,
4243                    AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY
4244                            | AKEY_EVENT_FLAG_CANCELED);
4245        }
4246    }
4247
4248    if (mLastRawState.rawPointerData.touchingIdBits.isEmpty()
4249            && !mCurrentRawState.rawPointerData.touchingIdBits.isEmpty()) {
4250        // Pointer just went down.  Check for virtual key press or off-screen touches.
4251        uint32_t id = mCurrentRawState.rawPointerData.touchingIdBits.firstMarkedBit();
4252        const RawPointerData::Pointer& pointer = mCurrentRawState.rawPointerData.pointerForId(id);
4253        if (!isPointInsideSurface(pointer.x, pointer.y)) {
4254            // If exactly one pointer went down, check for virtual key hit.
4255            // Otherwise we will drop the entire stroke.
4256            if (mCurrentRawState.rawPointerData.touchingIdBits.count() == 1) {
4257                const VirtualKey* virtualKey = findVirtualKeyHit(pointer.x, pointer.y);
4258                if (virtualKey) {
4259                    mCurrentVirtualKey.down = true;
4260                    mCurrentVirtualKey.downTime = when;
4261                    mCurrentVirtualKey.keyCode = virtualKey->keyCode;
4262                    mCurrentVirtualKey.scanCode = virtualKey->scanCode;
4263                    mCurrentVirtualKey.ignored = mContext->shouldDropVirtualKey(
4264                            when, getDevice(), virtualKey->keyCode, virtualKey->scanCode);
4265
4266                    if (!mCurrentVirtualKey.ignored) {
4267#if DEBUG_VIRTUAL_KEYS
4268                        ALOGD("VirtualKeys: Generating key down: keyCode=%d, scanCode=%d",
4269                                mCurrentVirtualKey.keyCode,
4270                                mCurrentVirtualKey.scanCode);
4271#endif
4272                        dispatchVirtualKey(when, policyFlags,
4273                                AKEY_EVENT_ACTION_DOWN,
4274                                AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
4275                    }
4276                }
4277            }
4278            return true;
4279        }
4280    }
4281
4282    // Disable all virtual key touches that happen within a short time interval of the
4283    // most recent touch within the screen area.  The idea is to filter out stray
4284    // virtual key presses when interacting with the touch screen.
4285    //
4286    // Problems we're trying to solve:
4287    //
4288    // 1. While scrolling a list or dragging the window shade, the user swipes down into a
4289    //    virtual key area that is implemented by a separate touch panel and accidentally
4290    //    triggers a virtual key.
4291    //
4292    // 2. While typing in the on screen keyboard, the user taps slightly outside the screen
4293    //    area and accidentally triggers a virtual key.  This often happens when virtual keys
4294    //    are layed out below the screen near to where the on screen keyboard's space bar
4295    //    is displayed.
4296    if (mConfig.virtualKeyQuietTime > 0 &&
4297            !mCurrentRawState.rawPointerData.touchingIdBits.isEmpty()) {
4298        mContext->disableVirtualKeysUntil(when + mConfig.virtualKeyQuietTime);
4299    }
4300    return false;
4301}
4302
4303void TouchInputMapper::dispatchVirtualKey(nsecs_t when, uint32_t policyFlags,
4304        int32_t keyEventAction, int32_t keyEventFlags) {
4305    int32_t keyCode = mCurrentVirtualKey.keyCode;
4306    int32_t scanCode = mCurrentVirtualKey.scanCode;
4307    nsecs_t downTime = mCurrentVirtualKey.downTime;
4308    int32_t metaState = mContext->getGlobalMetaState();
4309    policyFlags |= POLICY_FLAG_VIRTUAL;
4310
4311    NotifyKeyArgs args(when, getDeviceId(), AINPUT_SOURCE_KEYBOARD, policyFlags,
4312            keyEventAction, keyEventFlags, keyCode, scanCode, metaState, downTime);
4313    getListener()->notifyKey(&args);
4314}
4315
4316void TouchInputMapper::dispatchTouches(nsecs_t when, uint32_t policyFlags) {
4317    BitSet32 currentIdBits = mCurrentCookedState.cookedPointerData.touchingIdBits;
4318    BitSet32 lastIdBits = mLastCookedState.cookedPointerData.touchingIdBits;
4319    int32_t metaState = getContext()->getGlobalMetaState();
4320    int32_t buttonState = mCurrentCookedState.buttonState;
4321
4322    if (currentIdBits == lastIdBits) {
4323        if (!currentIdBits.isEmpty()) {
4324            // No pointer id changes so this is a move event.
4325            // The listener takes care of batching moves so we don't have to deal with that here.
4326            dispatchMotion(when, policyFlags, mSource,
4327                    AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
4328                    AMOTION_EVENT_EDGE_FLAG_NONE,
4329                    mCurrentCookedState.cookedPointerData.pointerProperties,
4330                    mCurrentCookedState.cookedPointerData.pointerCoords,
4331                    mCurrentCookedState.cookedPointerData.idToIndex,
4332                    currentIdBits, -1,
4333                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4334        }
4335    } else {
4336        // There may be pointers going up and pointers going down and pointers moving
4337        // all at the same time.
4338        BitSet32 upIdBits(lastIdBits.value & ~currentIdBits.value);
4339        BitSet32 downIdBits(currentIdBits.value & ~lastIdBits.value);
4340        BitSet32 moveIdBits(lastIdBits.value & currentIdBits.value);
4341        BitSet32 dispatchedIdBits(lastIdBits.value);
4342
4343        // Update last coordinates of pointers that have moved so that we observe the new
4344        // pointer positions at the same time as other pointers that have just gone up.
4345        bool moveNeeded = updateMovedPointers(
4346                mCurrentCookedState.cookedPointerData.pointerProperties,
4347                mCurrentCookedState.cookedPointerData.pointerCoords,
4348                mCurrentCookedState.cookedPointerData.idToIndex,
4349                mLastCookedState.cookedPointerData.pointerProperties,
4350                mLastCookedState.cookedPointerData.pointerCoords,
4351                mLastCookedState.cookedPointerData.idToIndex,
4352                moveIdBits);
4353        if (buttonState != mLastCookedState.buttonState) {
4354            moveNeeded = true;
4355        }
4356
4357        // Dispatch pointer up events.
4358        while (!upIdBits.isEmpty()) {
4359            uint32_t upId = upIdBits.clearFirstMarkedBit();
4360
4361            dispatchMotion(when, policyFlags, mSource,
4362                    AMOTION_EVENT_ACTION_POINTER_UP, 0, 0, metaState, buttonState, 0,
4363                    mLastCookedState.cookedPointerData.pointerProperties,
4364                    mLastCookedState.cookedPointerData.pointerCoords,
4365                    mLastCookedState.cookedPointerData.idToIndex,
4366                    dispatchedIdBits, upId, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4367            dispatchedIdBits.clearBit(upId);
4368        }
4369
4370        // Dispatch move events if any of the remaining pointers moved from their old locations.
4371        // Although applications receive new locations as part of individual pointer up
4372        // events, they do not generally handle them except when presented in a move event.
4373        if (moveNeeded && !moveIdBits.isEmpty()) {
4374            ALOG_ASSERT(moveIdBits.value == dispatchedIdBits.value);
4375            dispatchMotion(when, policyFlags, mSource,
4376                    AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState, 0,
4377                    mCurrentCookedState.cookedPointerData.pointerProperties,
4378                    mCurrentCookedState.cookedPointerData.pointerCoords,
4379                    mCurrentCookedState.cookedPointerData.idToIndex,
4380                    dispatchedIdBits, -1, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4381        }
4382
4383        // Dispatch pointer down events using the new pointer locations.
4384        while (!downIdBits.isEmpty()) {
4385            uint32_t downId = downIdBits.clearFirstMarkedBit();
4386            dispatchedIdBits.markBit(downId);
4387
4388            if (dispatchedIdBits.count() == 1) {
4389                // First pointer is going down.  Set down time.
4390                mDownTime = when;
4391            }
4392
4393            dispatchMotion(when, policyFlags, mSource,
4394                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0, metaState, buttonState, 0,
4395                    mCurrentCookedState.cookedPointerData.pointerProperties,
4396                    mCurrentCookedState.cookedPointerData.pointerCoords,
4397                    mCurrentCookedState.cookedPointerData.idToIndex,
4398                    dispatchedIdBits, downId, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4399        }
4400    }
4401}
4402
4403void TouchInputMapper::dispatchHoverExit(nsecs_t when, uint32_t policyFlags) {
4404    if (mSentHoverEnter &&
4405            (mCurrentCookedState.cookedPointerData.hoveringIdBits.isEmpty()
4406                    || !mCurrentCookedState.cookedPointerData.touchingIdBits.isEmpty())) {
4407        int32_t metaState = getContext()->getGlobalMetaState();
4408        dispatchMotion(when, policyFlags, mSource,
4409                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState, mLastCookedState.buttonState, 0,
4410                mLastCookedState.cookedPointerData.pointerProperties,
4411                mLastCookedState.cookedPointerData.pointerCoords,
4412                mLastCookedState.cookedPointerData.idToIndex,
4413                mLastCookedState.cookedPointerData.hoveringIdBits, -1,
4414                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4415        mSentHoverEnter = false;
4416    }
4417}
4418
4419void TouchInputMapper::dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags) {
4420    if (mCurrentCookedState.cookedPointerData.touchingIdBits.isEmpty()
4421            && !mCurrentCookedState.cookedPointerData.hoveringIdBits.isEmpty()) {
4422        int32_t metaState = getContext()->getGlobalMetaState();
4423        if (!mSentHoverEnter) {
4424            dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_ENTER,
4425                    0, 0, metaState, mCurrentRawState.buttonState, 0,
4426                    mCurrentCookedState.cookedPointerData.pointerProperties,
4427                    mCurrentCookedState.cookedPointerData.pointerCoords,
4428                    mCurrentCookedState.cookedPointerData.idToIndex,
4429                    mCurrentCookedState.cookedPointerData.hoveringIdBits, -1,
4430                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4431            mSentHoverEnter = true;
4432        }
4433
4434        dispatchMotion(when, policyFlags, mSource,
4435                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
4436                mCurrentRawState.buttonState, 0,
4437                mCurrentCookedState.cookedPointerData.pointerProperties,
4438                mCurrentCookedState.cookedPointerData.pointerCoords,
4439                mCurrentCookedState.cookedPointerData.idToIndex,
4440                mCurrentCookedState.cookedPointerData.hoveringIdBits, -1,
4441                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4442    }
4443}
4444
4445void TouchInputMapper::dispatchButtonRelease(nsecs_t when, uint32_t policyFlags) {
4446    BitSet32 releasedButtons(mLastCookedState.buttonState & ~mCurrentCookedState.buttonState);
4447    const BitSet32& idBits = findActiveIdBits(mLastCookedState.cookedPointerData);
4448    const int32_t metaState = getContext()->getGlobalMetaState();
4449    int32_t buttonState = mLastCookedState.buttonState;
4450    while (!releasedButtons.isEmpty()) {
4451        int32_t actionButton = BitSet32::valueForBit(releasedButtons.clearFirstMarkedBit());
4452        buttonState &= ~actionButton;
4453        dispatchMotion(when, policyFlags, mSource,
4454                    AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton,
4455                    0, metaState, buttonState, 0,
4456                    mCurrentCookedState.cookedPointerData.pointerProperties,
4457                    mCurrentCookedState.cookedPointerData.pointerCoords,
4458                    mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
4459                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4460    }
4461}
4462
4463void TouchInputMapper::dispatchButtonPress(nsecs_t when, uint32_t policyFlags) {
4464    BitSet32 pressedButtons(mCurrentCookedState.buttonState & ~mLastCookedState.buttonState);
4465    const BitSet32& idBits = findActiveIdBits(mCurrentCookedState.cookedPointerData);
4466    const int32_t metaState = getContext()->getGlobalMetaState();
4467    int32_t buttonState = mLastCookedState.buttonState;
4468    while (!pressedButtons.isEmpty()) {
4469        int32_t actionButton = BitSet32::valueForBit(pressedButtons.clearFirstMarkedBit());
4470        buttonState |= actionButton;
4471        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton,
4472                    0, metaState, buttonState, 0,
4473                    mCurrentCookedState.cookedPointerData.pointerProperties,
4474                    mCurrentCookedState.cookedPointerData.pointerCoords,
4475                    mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
4476                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4477    }
4478}
4479
4480const BitSet32& TouchInputMapper::findActiveIdBits(const CookedPointerData& cookedPointerData) {
4481    if (!cookedPointerData.touchingIdBits.isEmpty()) {
4482        return cookedPointerData.touchingIdBits;
4483    }
4484    return cookedPointerData.hoveringIdBits;
4485}
4486
4487void TouchInputMapper::cookPointerData() {
4488    uint32_t currentPointerCount = mCurrentRawState.rawPointerData.pointerCount;
4489
4490    mCurrentCookedState.cookedPointerData.clear();
4491    mCurrentCookedState.cookedPointerData.pointerCount = currentPointerCount;
4492    mCurrentCookedState.cookedPointerData.hoveringIdBits =
4493            mCurrentRawState.rawPointerData.hoveringIdBits;
4494    mCurrentCookedState.cookedPointerData.touchingIdBits =
4495            mCurrentRawState.rawPointerData.touchingIdBits;
4496
4497    if (mCurrentCookedState.cookedPointerData.pointerCount == 0) {
4498        mCurrentCookedState.buttonState = 0;
4499    } else {
4500        mCurrentCookedState.buttonState = mCurrentRawState.buttonState;
4501    }
4502
4503    // Walk through the the active pointers and map device coordinates onto
4504    // surface coordinates and adjust for display orientation.
4505    for (uint32_t i = 0; i < currentPointerCount; i++) {
4506        const RawPointerData::Pointer& in = mCurrentRawState.rawPointerData.pointers[i];
4507
4508        // Size
4509        float touchMajor, touchMinor, toolMajor, toolMinor, size;
4510        switch (mCalibration.sizeCalibration) {
4511        case Calibration::SIZE_CALIBRATION_GEOMETRIC:
4512        case Calibration::SIZE_CALIBRATION_DIAMETER:
4513        case Calibration::SIZE_CALIBRATION_BOX:
4514        case Calibration::SIZE_CALIBRATION_AREA:
4515            if (mRawPointerAxes.touchMajor.valid && mRawPointerAxes.toolMajor.valid) {
4516                touchMajor = in.touchMajor;
4517                touchMinor = mRawPointerAxes.touchMinor.valid ? in.touchMinor : in.touchMajor;
4518                toolMajor = in.toolMajor;
4519                toolMinor = mRawPointerAxes.toolMinor.valid ? in.toolMinor : in.toolMajor;
4520                size = mRawPointerAxes.touchMinor.valid
4521                        ? avg(in.touchMajor, in.touchMinor) : in.touchMajor;
4522            } else if (mRawPointerAxes.touchMajor.valid) {
4523                toolMajor = touchMajor = in.touchMajor;
4524                toolMinor = touchMinor = mRawPointerAxes.touchMinor.valid
4525                        ? in.touchMinor : in.touchMajor;
4526                size = mRawPointerAxes.touchMinor.valid
4527                        ? avg(in.touchMajor, in.touchMinor) : in.touchMajor;
4528            } else if (mRawPointerAxes.toolMajor.valid) {
4529                touchMajor = toolMajor = in.toolMajor;
4530                touchMinor = toolMinor = mRawPointerAxes.toolMinor.valid
4531                        ? in.toolMinor : in.toolMajor;
4532                size = mRawPointerAxes.toolMinor.valid
4533                        ? avg(in.toolMajor, in.toolMinor) : in.toolMajor;
4534            } else {
4535                ALOG_ASSERT(false, "No touch or tool axes.  "
4536                        "Size calibration should have been resolved to NONE.");
4537                touchMajor = 0;
4538                touchMinor = 0;
4539                toolMajor = 0;
4540                toolMinor = 0;
4541                size = 0;
4542            }
4543
4544            if (mCalibration.haveSizeIsSummed && mCalibration.sizeIsSummed) {
4545                uint32_t touchingCount =
4546                        mCurrentRawState.rawPointerData.touchingIdBits.count();
4547                if (touchingCount > 1) {
4548                    touchMajor /= touchingCount;
4549                    touchMinor /= touchingCount;
4550                    toolMajor /= touchingCount;
4551                    toolMinor /= touchingCount;
4552                    size /= touchingCount;
4553                }
4554            }
4555
4556            if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_GEOMETRIC) {
4557                touchMajor *= mGeometricScale;
4558                touchMinor *= mGeometricScale;
4559                toolMajor *= mGeometricScale;
4560                toolMinor *= mGeometricScale;
4561            } else if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_AREA) {
4562                touchMajor = touchMajor > 0 ? sqrtf(touchMajor) : 0;
4563                touchMinor = touchMajor;
4564                toolMajor = toolMajor > 0 ? sqrtf(toolMajor) : 0;
4565                toolMinor = toolMajor;
4566            } else if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_DIAMETER) {
4567                touchMinor = touchMajor;
4568                toolMinor = toolMajor;
4569            }
4570
4571            mCalibration.applySizeScaleAndBias(&touchMajor);
4572            mCalibration.applySizeScaleAndBias(&touchMinor);
4573            mCalibration.applySizeScaleAndBias(&toolMajor);
4574            mCalibration.applySizeScaleAndBias(&toolMinor);
4575            size *= mSizeScale;
4576            break;
4577        default:
4578            touchMajor = 0;
4579            touchMinor = 0;
4580            toolMajor = 0;
4581            toolMinor = 0;
4582            size = 0;
4583            break;
4584        }
4585
4586        // Pressure
4587        float pressure;
4588        switch (mCalibration.pressureCalibration) {
4589        case Calibration::PRESSURE_CALIBRATION_PHYSICAL:
4590        case Calibration::PRESSURE_CALIBRATION_AMPLITUDE:
4591            pressure = in.pressure * mPressureScale;
4592            break;
4593        default:
4594            pressure = in.isHovering ? 0 : 1;
4595            break;
4596        }
4597
4598        // Tilt and Orientation
4599        float tilt;
4600        float orientation;
4601        if (mHaveTilt) {
4602            float tiltXAngle = (in.tiltX - mTiltXCenter) * mTiltXScale;
4603            float tiltYAngle = (in.tiltY - mTiltYCenter) * mTiltYScale;
4604            orientation = atan2f(-sinf(tiltXAngle), sinf(tiltYAngle));
4605            tilt = acosf(cosf(tiltXAngle) * cosf(tiltYAngle));
4606        } else {
4607            tilt = 0;
4608
4609            switch (mCalibration.orientationCalibration) {
4610            case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
4611                orientation = in.orientation * mOrientationScale;
4612                break;
4613            case Calibration::ORIENTATION_CALIBRATION_VECTOR: {
4614                int32_t c1 = signExtendNybble((in.orientation & 0xf0) >> 4);
4615                int32_t c2 = signExtendNybble(in.orientation & 0x0f);
4616                if (c1 != 0 || c2 != 0) {
4617                    orientation = atan2f(c1, c2) * 0.5f;
4618                    float confidence = hypotf(c1, c2);
4619                    float scale = 1.0f + confidence / 16.0f;
4620                    touchMajor *= scale;
4621                    touchMinor /= scale;
4622                    toolMajor *= scale;
4623                    toolMinor /= scale;
4624                } else {
4625                    orientation = 0;
4626                }
4627                break;
4628            }
4629            default:
4630                orientation = 0;
4631            }
4632        }
4633
4634        // Distance
4635        float distance;
4636        switch (mCalibration.distanceCalibration) {
4637        case Calibration::DISTANCE_CALIBRATION_SCALED:
4638            distance = in.distance * mDistanceScale;
4639            break;
4640        default:
4641            distance = 0;
4642        }
4643
4644        // Coverage
4645        int32_t rawLeft, rawTop, rawRight, rawBottom;
4646        switch (mCalibration.coverageCalibration) {
4647        case Calibration::COVERAGE_CALIBRATION_BOX:
4648            rawLeft = (in.toolMinor & 0xffff0000) >> 16;
4649            rawRight = in.toolMinor & 0x0000ffff;
4650            rawBottom = in.toolMajor & 0x0000ffff;
4651            rawTop = (in.toolMajor & 0xffff0000) >> 16;
4652            break;
4653        default:
4654            rawLeft = rawTop = rawRight = rawBottom = 0;
4655            break;
4656        }
4657
4658        // Adjust X,Y coords for device calibration
4659        // TODO: Adjust coverage coords?
4660        float xTransformed = in.x, yTransformed = in.y;
4661        mAffineTransform.applyTo(xTransformed, yTransformed);
4662
4663        // Adjust X, Y, and coverage coords for surface orientation.
4664        float x, y;
4665        float left, top, right, bottom;
4666
4667        switch (mSurfaceOrientation) {
4668        case DISPLAY_ORIENTATION_90:
4669            x = float(yTransformed - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4670            y = float(mRawPointerAxes.x.maxValue - xTransformed) * mXScale + mXTranslate;
4671            left = float(rawTop - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4672            right = float(rawBottom- mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4673            bottom = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale + mXTranslate;
4674            top = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale + mXTranslate;
4675            orientation -= M_PI_2;
4676            if (orientation < mOrientedRanges.orientation.min) {
4677                orientation += (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
4678            }
4679            break;
4680        case DISPLAY_ORIENTATION_180:
4681            x = float(mRawPointerAxes.x.maxValue - xTransformed) * mXScale + mXTranslate;
4682            y = float(mRawPointerAxes.y.maxValue - yTransformed) * mYScale + mYTranslate;
4683            left = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale + mXTranslate;
4684            right = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale + mXTranslate;
4685            bottom = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale + mYTranslate;
4686            top = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale + mYTranslate;
4687            orientation -= M_PI;
4688            if (orientation < mOrientedRanges.orientation.min) {
4689                orientation += (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
4690            }
4691            break;
4692        case DISPLAY_ORIENTATION_270:
4693            x = float(mRawPointerAxes.y.maxValue - yTransformed) * mYScale + mYTranslate;
4694            y = float(xTransformed - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4695            left = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale + mYTranslate;
4696            right = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale + mYTranslate;
4697            bottom = float(rawRight - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4698            top = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4699            orientation += M_PI_2;
4700            if (orientation > mOrientedRanges.orientation.max) {
4701                orientation -= (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
4702            }
4703            break;
4704        default:
4705            x = float(xTransformed - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4706            y = float(yTransformed - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4707            left = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4708            right = float(rawRight - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4709            bottom = float(rawBottom - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4710            top = float(rawTop - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4711            break;
4712        }
4713
4714        // Write output coords.
4715        PointerCoords& out = mCurrentCookedState.cookedPointerData.pointerCoords[i];
4716        out.clear();
4717        out.setAxisValue(AMOTION_EVENT_AXIS_X, x);
4718        out.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
4719        out.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, pressure);
4720        out.setAxisValue(AMOTION_EVENT_AXIS_SIZE, size);
4721        out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR, touchMajor);
4722        out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR, touchMinor);
4723        out.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, orientation);
4724        out.setAxisValue(AMOTION_EVENT_AXIS_TILT, tilt);
4725        out.setAxisValue(AMOTION_EVENT_AXIS_DISTANCE, distance);
4726        if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_BOX) {
4727            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_1, left);
4728            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_2, top);
4729            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_3, right);
4730            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_4, bottom);
4731        } else {
4732            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, toolMajor);
4733            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR, toolMinor);
4734        }
4735
4736        // Write output properties.
4737        PointerProperties& properties =
4738                mCurrentCookedState.cookedPointerData.pointerProperties[i];
4739        uint32_t id = in.id;
4740        properties.clear();
4741        properties.id = id;
4742        properties.toolType = in.toolType;
4743
4744        // Write id index.
4745        mCurrentCookedState.cookedPointerData.idToIndex[id] = i;
4746    }
4747}
4748
4749void TouchInputMapper::dispatchPointerUsage(nsecs_t when, uint32_t policyFlags,
4750        PointerUsage pointerUsage) {
4751    if (pointerUsage != mPointerUsage) {
4752        abortPointerUsage(when, policyFlags);
4753        mPointerUsage = pointerUsage;
4754    }
4755
4756    switch (mPointerUsage) {
4757    case POINTER_USAGE_GESTURES:
4758        dispatchPointerGestures(when, policyFlags, false /*isTimeout*/);
4759        break;
4760    case POINTER_USAGE_STYLUS:
4761        dispatchPointerStylus(when, policyFlags);
4762        break;
4763    case POINTER_USAGE_MOUSE:
4764        dispatchPointerMouse(when, policyFlags);
4765        break;
4766    default:
4767        break;
4768    }
4769}
4770
4771void TouchInputMapper::abortPointerUsage(nsecs_t when, uint32_t policyFlags) {
4772    switch (mPointerUsage) {
4773    case POINTER_USAGE_GESTURES:
4774        abortPointerGestures(when, policyFlags);
4775        break;
4776    case POINTER_USAGE_STYLUS:
4777        abortPointerStylus(when, policyFlags);
4778        break;
4779    case POINTER_USAGE_MOUSE:
4780        abortPointerMouse(when, policyFlags);
4781        break;
4782    default:
4783        break;
4784    }
4785
4786    mPointerUsage = POINTER_USAGE_NONE;
4787}
4788
4789void TouchInputMapper::dispatchPointerGestures(nsecs_t when, uint32_t policyFlags,
4790        bool isTimeout) {
4791    // Update current gesture coordinates.
4792    bool cancelPreviousGesture, finishPreviousGesture;
4793    bool sendEvents = preparePointerGestures(when,
4794            &cancelPreviousGesture, &finishPreviousGesture, isTimeout);
4795    if (!sendEvents) {
4796        return;
4797    }
4798    if (finishPreviousGesture) {
4799        cancelPreviousGesture = false;
4800    }
4801
4802    // Update the pointer presentation and spots.
4803    if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS) {
4804        mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_SPOT);
4805        if (finishPreviousGesture || cancelPreviousGesture) {
4806            mPointerController->clearSpots();
4807        }
4808        mPointerController->setSpots(mPointerGesture.currentGestureCoords,
4809                mPointerGesture.currentGestureIdToIndex,
4810                mPointerGesture.currentGestureIdBits);
4811    } else {
4812        mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
4813    }
4814
4815    // Show or hide the pointer if needed.
4816    switch (mPointerGesture.currentGestureMode) {
4817    case PointerGesture::NEUTRAL:
4818    case PointerGesture::QUIET:
4819        if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS
4820                && (mPointerGesture.lastGestureMode == PointerGesture::SWIPE
4821                        || mPointerGesture.lastGestureMode == PointerGesture::FREEFORM)) {
4822            // Remind the user of where the pointer is after finishing a gesture with spots.
4823            mPointerController->unfade(PointerControllerInterface::TRANSITION_GRADUAL);
4824        }
4825        break;
4826    case PointerGesture::TAP:
4827    case PointerGesture::TAP_DRAG:
4828    case PointerGesture::BUTTON_CLICK_OR_DRAG:
4829    case PointerGesture::HOVER:
4830    case PointerGesture::PRESS:
4831        // Unfade the pointer when the current gesture manipulates the
4832        // area directly under the pointer.
4833        mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
4834        break;
4835    case PointerGesture::SWIPE:
4836    case PointerGesture::FREEFORM:
4837        // Fade the pointer when the current gesture manipulates a different
4838        // area and there are spots to guide the user experience.
4839        if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS) {
4840            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
4841        } else {
4842            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
4843        }
4844        break;
4845    }
4846
4847    // Send events!
4848    int32_t metaState = getContext()->getGlobalMetaState();
4849    int32_t buttonState = mCurrentCookedState.buttonState;
4850
4851    // Update last coordinates of pointers that have moved so that we observe the new
4852    // pointer positions at the same time as other pointers that have just gone up.
4853    bool down = mPointerGesture.currentGestureMode == PointerGesture::TAP
4854            || mPointerGesture.currentGestureMode == PointerGesture::TAP_DRAG
4855            || mPointerGesture.currentGestureMode == PointerGesture::BUTTON_CLICK_OR_DRAG
4856            || mPointerGesture.currentGestureMode == PointerGesture::PRESS
4857            || mPointerGesture.currentGestureMode == PointerGesture::SWIPE
4858            || mPointerGesture.currentGestureMode == PointerGesture::FREEFORM;
4859    bool moveNeeded = false;
4860    if (down && !cancelPreviousGesture && !finishPreviousGesture
4861            && !mPointerGesture.lastGestureIdBits.isEmpty()
4862            && !mPointerGesture.currentGestureIdBits.isEmpty()) {
4863        BitSet32 movedGestureIdBits(mPointerGesture.currentGestureIdBits.value
4864                & mPointerGesture.lastGestureIdBits.value);
4865        moveNeeded = updateMovedPointers(mPointerGesture.currentGestureProperties,
4866                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
4867                mPointerGesture.lastGestureProperties,
4868                mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
4869                movedGestureIdBits);
4870        if (buttonState != mLastCookedState.buttonState) {
4871            moveNeeded = true;
4872        }
4873    }
4874
4875    // Send motion events for all pointers that went up or were canceled.
4876    BitSet32 dispatchedGestureIdBits(mPointerGesture.lastGestureIdBits);
4877    if (!dispatchedGestureIdBits.isEmpty()) {
4878        if (cancelPreviousGesture) {
4879            dispatchMotion(when, policyFlags, mSource,
4880                    AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState, buttonState,
4881                    AMOTION_EVENT_EDGE_FLAG_NONE,
4882                    mPointerGesture.lastGestureProperties,
4883                    mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
4884                    dispatchedGestureIdBits, -1, 0,
4885                    0, mPointerGesture.downTime);
4886
4887            dispatchedGestureIdBits.clear();
4888        } else {
4889            BitSet32 upGestureIdBits;
4890            if (finishPreviousGesture) {
4891                upGestureIdBits = dispatchedGestureIdBits;
4892            } else {
4893                upGestureIdBits.value = dispatchedGestureIdBits.value
4894                        & ~mPointerGesture.currentGestureIdBits.value;
4895            }
4896            while (!upGestureIdBits.isEmpty()) {
4897                uint32_t id = upGestureIdBits.clearFirstMarkedBit();
4898
4899                dispatchMotion(when, policyFlags, mSource,
4900                        AMOTION_EVENT_ACTION_POINTER_UP, 0, 0,
4901                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
4902                        mPointerGesture.lastGestureProperties,
4903                        mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
4904                        dispatchedGestureIdBits, id,
4905                        0, 0, mPointerGesture.downTime);
4906
4907                dispatchedGestureIdBits.clearBit(id);
4908            }
4909        }
4910    }
4911
4912    // Send motion events for all pointers that moved.
4913    if (moveNeeded) {
4914        dispatchMotion(when, policyFlags, mSource,
4915                AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
4916                AMOTION_EVENT_EDGE_FLAG_NONE,
4917                mPointerGesture.currentGestureProperties,
4918                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
4919                dispatchedGestureIdBits, -1,
4920                0, 0, mPointerGesture.downTime);
4921    }
4922
4923    // Send motion events for all pointers that went down.
4924    if (down) {
4925        BitSet32 downGestureIdBits(mPointerGesture.currentGestureIdBits.value
4926                & ~dispatchedGestureIdBits.value);
4927        while (!downGestureIdBits.isEmpty()) {
4928            uint32_t id = downGestureIdBits.clearFirstMarkedBit();
4929            dispatchedGestureIdBits.markBit(id);
4930
4931            if (dispatchedGestureIdBits.count() == 1) {
4932                mPointerGesture.downTime = when;
4933            }
4934
4935            dispatchMotion(when, policyFlags, mSource,
4936                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0, metaState, buttonState, 0,
4937                    mPointerGesture.currentGestureProperties,
4938                    mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
4939                    dispatchedGestureIdBits, id,
4940                    0, 0, mPointerGesture.downTime);
4941        }
4942    }
4943
4944    // Send motion events for hover.
4945    if (mPointerGesture.currentGestureMode == PointerGesture::HOVER) {
4946        dispatchMotion(when, policyFlags, mSource,
4947                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
4948                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
4949                mPointerGesture.currentGestureProperties,
4950                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
4951                mPointerGesture.currentGestureIdBits, -1,
4952                0, 0, mPointerGesture.downTime);
4953    } else if (dispatchedGestureIdBits.isEmpty()
4954            && !mPointerGesture.lastGestureIdBits.isEmpty()) {
4955        // Synthesize a hover move event after all pointers go up to indicate that
4956        // the pointer is hovering again even if the user is not currently touching
4957        // the touch pad.  This ensures that a view will receive a fresh hover enter
4958        // event after a tap.
4959        float x, y;
4960        mPointerController->getPosition(&x, &y);
4961
4962        PointerProperties pointerProperties;
4963        pointerProperties.clear();
4964        pointerProperties.id = 0;
4965        pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
4966
4967        PointerCoords pointerCoords;
4968        pointerCoords.clear();
4969        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
4970        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
4971
4972        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
4973                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
4974                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
4975                mViewport.displayId, 1, &pointerProperties, &pointerCoords,
4976                0, 0, mPointerGesture.downTime);
4977        getListener()->notifyMotion(&args);
4978    }
4979
4980    // Update state.
4981    mPointerGesture.lastGestureMode = mPointerGesture.currentGestureMode;
4982    if (!down) {
4983        mPointerGesture.lastGestureIdBits.clear();
4984    } else {
4985        mPointerGesture.lastGestureIdBits = mPointerGesture.currentGestureIdBits;
4986        for (BitSet32 idBits(mPointerGesture.currentGestureIdBits); !idBits.isEmpty(); ) {
4987            uint32_t id = idBits.clearFirstMarkedBit();
4988            uint32_t index = mPointerGesture.currentGestureIdToIndex[id];
4989            mPointerGesture.lastGestureProperties[index].copyFrom(
4990                    mPointerGesture.currentGestureProperties[index]);
4991            mPointerGesture.lastGestureCoords[index].copyFrom(
4992                    mPointerGesture.currentGestureCoords[index]);
4993            mPointerGesture.lastGestureIdToIndex[id] = index;
4994        }
4995    }
4996}
4997
4998void TouchInputMapper::abortPointerGestures(nsecs_t when, uint32_t policyFlags) {
4999    // Cancel previously dispatches pointers.
5000    if (!mPointerGesture.lastGestureIdBits.isEmpty()) {
5001        int32_t metaState = getContext()->getGlobalMetaState();
5002        int32_t buttonState = mCurrentRawState.buttonState;
5003        dispatchMotion(when, policyFlags, mSource,
5004                AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState, buttonState,
5005                AMOTION_EVENT_EDGE_FLAG_NONE,
5006                mPointerGesture.lastGestureProperties,
5007                mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
5008                mPointerGesture.lastGestureIdBits, -1,
5009                0, 0, mPointerGesture.downTime);
5010    }
5011
5012    // Reset the current pointer gesture.
5013    mPointerGesture.reset();
5014    mPointerVelocityControl.reset();
5015
5016    // Remove any current spots.
5017    if (mPointerController != NULL) {
5018        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
5019        mPointerController->clearSpots();
5020    }
5021}
5022
5023bool TouchInputMapper::preparePointerGestures(nsecs_t when,
5024        bool* outCancelPreviousGesture, bool* outFinishPreviousGesture, bool isTimeout) {
5025    *outCancelPreviousGesture = false;
5026    *outFinishPreviousGesture = false;
5027
5028    // Handle TAP timeout.
5029    if (isTimeout) {
5030#if DEBUG_GESTURES
5031        ALOGD("Gestures: Processing timeout");
5032#endif
5033
5034        if (mPointerGesture.lastGestureMode == PointerGesture::TAP) {
5035            if (when <= mPointerGesture.tapUpTime + mConfig.pointerGestureTapDragInterval) {
5036                // The tap/drag timeout has not yet expired.
5037                getContext()->requestTimeoutAtTime(mPointerGesture.tapUpTime
5038                        + mConfig.pointerGestureTapDragInterval);
5039            } else {
5040                // The tap is finished.
5041#if DEBUG_GESTURES
5042                ALOGD("Gestures: TAP finished");
5043#endif
5044                *outFinishPreviousGesture = true;
5045
5046                mPointerGesture.activeGestureId = -1;
5047                mPointerGesture.currentGestureMode = PointerGesture::NEUTRAL;
5048                mPointerGesture.currentGestureIdBits.clear();
5049
5050                mPointerVelocityControl.reset();
5051                return true;
5052            }
5053        }
5054
5055        // We did not handle this timeout.
5056        return false;
5057    }
5058
5059    const uint32_t currentFingerCount = mCurrentCookedState.fingerIdBits.count();
5060    const uint32_t lastFingerCount = mLastCookedState.fingerIdBits.count();
5061
5062    // Update the velocity tracker.
5063    {
5064        VelocityTracker::Position positions[MAX_POINTERS];
5065        uint32_t count = 0;
5066        for (BitSet32 idBits(mCurrentCookedState.fingerIdBits); !idBits.isEmpty(); count++) {
5067            uint32_t id = idBits.clearFirstMarkedBit();
5068            const RawPointerData::Pointer& pointer =
5069                    mCurrentRawState.rawPointerData.pointerForId(id);
5070            positions[count].x = pointer.x * mPointerXMovementScale;
5071            positions[count].y = pointer.y * mPointerYMovementScale;
5072        }
5073        mPointerGesture.velocityTracker.addMovement(when,
5074                mCurrentCookedState.fingerIdBits, positions);
5075    }
5076
5077    // If the gesture ever enters a mode other than TAP, HOVER or TAP_DRAG, without first returning
5078    // to NEUTRAL, then we should not generate tap event.
5079    if (mPointerGesture.lastGestureMode != PointerGesture::HOVER
5080            && mPointerGesture.lastGestureMode != PointerGesture::TAP
5081            && mPointerGesture.lastGestureMode != PointerGesture::TAP_DRAG) {
5082        mPointerGesture.resetTap();
5083    }
5084
5085    // Pick a new active touch id if needed.
5086    // Choose an arbitrary pointer that just went down, if there is one.
5087    // Otherwise choose an arbitrary remaining pointer.
5088    // This guarantees we always have an active touch id when there is at least one pointer.
5089    // We keep the same active touch id for as long as possible.
5090    bool activeTouchChanged = false;
5091    int32_t lastActiveTouchId = mPointerGesture.activeTouchId;
5092    int32_t activeTouchId = lastActiveTouchId;
5093    if (activeTouchId < 0) {
5094        if (!mCurrentCookedState.fingerIdBits.isEmpty()) {
5095            activeTouchChanged = true;
5096            activeTouchId = mPointerGesture.activeTouchId =
5097                    mCurrentCookedState.fingerIdBits.firstMarkedBit();
5098            mPointerGesture.firstTouchTime = when;
5099        }
5100    } else if (!mCurrentCookedState.fingerIdBits.hasBit(activeTouchId)) {
5101        activeTouchChanged = true;
5102        if (!mCurrentCookedState.fingerIdBits.isEmpty()) {
5103            activeTouchId = mPointerGesture.activeTouchId =
5104                    mCurrentCookedState.fingerIdBits.firstMarkedBit();
5105        } else {
5106            activeTouchId = mPointerGesture.activeTouchId = -1;
5107        }
5108    }
5109
5110    // Determine whether we are in quiet time.
5111    bool isQuietTime = false;
5112    if (activeTouchId < 0) {
5113        mPointerGesture.resetQuietTime();
5114    } else {
5115        isQuietTime = when < mPointerGesture.quietTime + mConfig.pointerGestureQuietInterval;
5116        if (!isQuietTime) {
5117            if ((mPointerGesture.lastGestureMode == PointerGesture::PRESS
5118                    || mPointerGesture.lastGestureMode == PointerGesture::SWIPE
5119                    || mPointerGesture.lastGestureMode == PointerGesture::FREEFORM)
5120                    && currentFingerCount < 2) {
5121                // Enter quiet time when exiting swipe or freeform state.
5122                // This is to prevent accidentally entering the hover state and flinging the
5123                // pointer when finishing a swipe and there is still one pointer left onscreen.
5124                isQuietTime = true;
5125            } else if (mPointerGesture.lastGestureMode == PointerGesture::BUTTON_CLICK_OR_DRAG
5126                    && currentFingerCount >= 2
5127                    && !isPointerDown(mCurrentRawState.buttonState)) {
5128                // Enter quiet time when releasing the button and there are still two or more
5129                // fingers down.  This may indicate that one finger was used to press the button
5130                // but it has not gone up yet.
5131                isQuietTime = true;
5132            }
5133            if (isQuietTime) {
5134                mPointerGesture.quietTime = when;
5135            }
5136        }
5137    }
5138
5139    // Switch states based on button and pointer state.
5140    if (isQuietTime) {
5141        // Case 1: Quiet time. (QUIET)
5142#if DEBUG_GESTURES
5143        ALOGD("Gestures: QUIET for next %0.3fms", (mPointerGesture.quietTime
5144                + mConfig.pointerGestureQuietInterval - when) * 0.000001f);
5145#endif
5146        if (mPointerGesture.lastGestureMode != PointerGesture::QUIET) {
5147            *outFinishPreviousGesture = true;
5148        }
5149
5150        mPointerGesture.activeGestureId = -1;
5151        mPointerGesture.currentGestureMode = PointerGesture::QUIET;
5152        mPointerGesture.currentGestureIdBits.clear();
5153
5154        mPointerVelocityControl.reset();
5155    } else if (isPointerDown(mCurrentRawState.buttonState)) {
5156        // Case 2: Button is pressed. (BUTTON_CLICK_OR_DRAG)
5157        // The pointer follows the active touch point.
5158        // Emit DOWN, MOVE, UP events at the pointer location.
5159        //
5160        // Only the active touch matters; other fingers are ignored.  This policy helps
5161        // to handle the case where the user places a second finger on the touch pad
5162        // to apply the necessary force to depress an integrated button below the surface.
5163        // We don't want the second finger to be delivered to applications.
5164        //
5165        // For this to work well, we need to make sure to track the pointer that is really
5166        // active.  If the user first puts one finger down to click then adds another
5167        // finger to drag then the active pointer should switch to the finger that is
5168        // being dragged.
5169#if DEBUG_GESTURES
5170        ALOGD("Gestures: BUTTON_CLICK_OR_DRAG activeTouchId=%d, "
5171                "currentFingerCount=%d", activeTouchId, currentFingerCount);
5172#endif
5173        // Reset state when just starting.
5174        if (mPointerGesture.lastGestureMode != PointerGesture::BUTTON_CLICK_OR_DRAG) {
5175            *outFinishPreviousGesture = true;
5176            mPointerGesture.activeGestureId = 0;
5177        }
5178
5179        // Switch pointers if needed.
5180        // Find the fastest pointer and follow it.
5181        if (activeTouchId >= 0 && currentFingerCount > 1) {
5182            int32_t bestId = -1;
5183            float bestSpeed = mConfig.pointerGestureDragMinSwitchSpeed;
5184            for (BitSet32 idBits(mCurrentCookedState.fingerIdBits); !idBits.isEmpty(); ) {
5185                uint32_t id = idBits.clearFirstMarkedBit();
5186                float vx, vy;
5187                if (mPointerGesture.velocityTracker.getVelocity(id, &vx, &vy)) {
5188                    float speed = hypotf(vx, vy);
5189                    if (speed > bestSpeed) {
5190                        bestId = id;
5191                        bestSpeed = speed;
5192                    }
5193                }
5194            }
5195            if (bestId >= 0 && bestId != activeTouchId) {
5196                mPointerGesture.activeTouchId = activeTouchId = bestId;
5197                activeTouchChanged = true;
5198#if DEBUG_GESTURES
5199                ALOGD("Gestures: BUTTON_CLICK_OR_DRAG switched pointers, "
5200                        "bestId=%d, bestSpeed=%0.3f", bestId, bestSpeed);
5201#endif
5202            }
5203        }
5204
5205        if (activeTouchId >= 0 && mLastCookedState.fingerIdBits.hasBit(activeTouchId)) {
5206            const RawPointerData::Pointer& currentPointer =
5207                    mCurrentRawState.rawPointerData.pointerForId(activeTouchId);
5208            const RawPointerData::Pointer& lastPointer =
5209                    mLastRawState.rawPointerData.pointerForId(activeTouchId);
5210            float deltaX = (currentPointer.x - lastPointer.x) * mPointerXMovementScale;
5211            float deltaY = (currentPointer.y - lastPointer.y) * mPointerYMovementScale;
5212
5213            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5214            mPointerVelocityControl.move(when, &deltaX, &deltaY);
5215
5216            // Move the pointer using a relative motion.
5217            // When using spots, the click will occur at the position of the anchor
5218            // spot and all other spots will move there.
5219            mPointerController->move(deltaX, deltaY);
5220        } else {
5221            mPointerVelocityControl.reset();
5222        }
5223
5224        float x, y;
5225        mPointerController->getPosition(&x, &y);
5226
5227        mPointerGesture.currentGestureMode = PointerGesture::BUTTON_CLICK_OR_DRAG;
5228        mPointerGesture.currentGestureIdBits.clear();
5229        mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
5230        mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
5231        mPointerGesture.currentGestureProperties[0].clear();
5232        mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
5233        mPointerGesture.currentGestureProperties[0].toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
5234        mPointerGesture.currentGestureCoords[0].clear();
5235        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
5236        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5237        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5238    } else if (currentFingerCount == 0) {
5239        // Case 3. No fingers down and button is not pressed. (NEUTRAL)
5240        if (mPointerGesture.lastGestureMode != PointerGesture::NEUTRAL) {
5241            *outFinishPreviousGesture = true;
5242        }
5243
5244        // Watch for taps coming out of HOVER or TAP_DRAG mode.
5245        // Checking for taps after TAP_DRAG allows us to detect double-taps.
5246        bool tapped = false;
5247        if ((mPointerGesture.lastGestureMode == PointerGesture::HOVER
5248                || mPointerGesture.lastGestureMode == PointerGesture::TAP_DRAG)
5249                && lastFingerCount == 1) {
5250            if (when <= mPointerGesture.tapDownTime + mConfig.pointerGestureTapInterval) {
5251                float x, y;
5252                mPointerController->getPosition(&x, &y);
5253                if (fabs(x - mPointerGesture.tapX) <= mConfig.pointerGestureTapSlop
5254                        && fabs(y - mPointerGesture.tapY) <= mConfig.pointerGestureTapSlop) {
5255#if DEBUG_GESTURES
5256                    ALOGD("Gestures: TAP");
5257#endif
5258
5259                    mPointerGesture.tapUpTime = when;
5260                    getContext()->requestTimeoutAtTime(when
5261                            + mConfig.pointerGestureTapDragInterval);
5262
5263                    mPointerGesture.activeGestureId = 0;
5264                    mPointerGesture.currentGestureMode = PointerGesture::TAP;
5265                    mPointerGesture.currentGestureIdBits.clear();
5266                    mPointerGesture.currentGestureIdBits.markBit(
5267                            mPointerGesture.activeGestureId);
5268                    mPointerGesture.currentGestureIdToIndex[
5269                            mPointerGesture.activeGestureId] = 0;
5270                    mPointerGesture.currentGestureProperties[0].clear();
5271                    mPointerGesture.currentGestureProperties[0].id =
5272                            mPointerGesture.activeGestureId;
5273                    mPointerGesture.currentGestureProperties[0].toolType =
5274                            AMOTION_EVENT_TOOL_TYPE_FINGER;
5275                    mPointerGesture.currentGestureCoords[0].clear();
5276                    mPointerGesture.currentGestureCoords[0].setAxisValue(
5277                            AMOTION_EVENT_AXIS_X, mPointerGesture.tapX);
5278                    mPointerGesture.currentGestureCoords[0].setAxisValue(
5279                            AMOTION_EVENT_AXIS_Y, mPointerGesture.tapY);
5280                    mPointerGesture.currentGestureCoords[0].setAxisValue(
5281                            AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5282
5283                    tapped = true;
5284                } else {
5285#if DEBUG_GESTURES
5286                    ALOGD("Gestures: Not a TAP, deltaX=%f, deltaY=%f",
5287                            x - mPointerGesture.tapX,
5288                            y - mPointerGesture.tapY);
5289#endif
5290                }
5291            } else {
5292#if DEBUG_GESTURES
5293                if (mPointerGesture.tapDownTime != LLONG_MIN) {
5294                    ALOGD("Gestures: Not a TAP, %0.3fms since down",
5295                            (when - mPointerGesture.tapDownTime) * 0.000001f);
5296                } else {
5297                    ALOGD("Gestures: Not a TAP, incompatible mode transitions");
5298                }
5299#endif
5300            }
5301        }
5302
5303        mPointerVelocityControl.reset();
5304
5305        if (!tapped) {
5306#if DEBUG_GESTURES
5307            ALOGD("Gestures: NEUTRAL");
5308#endif
5309            mPointerGesture.activeGestureId = -1;
5310            mPointerGesture.currentGestureMode = PointerGesture::NEUTRAL;
5311            mPointerGesture.currentGestureIdBits.clear();
5312        }
5313    } else if (currentFingerCount == 1) {
5314        // Case 4. Exactly one finger down, button is not pressed. (HOVER or TAP_DRAG)
5315        // The pointer follows the active touch point.
5316        // When in HOVER, emit HOVER_MOVE events at the pointer location.
5317        // When in TAP_DRAG, emit MOVE events at the pointer location.
5318        ALOG_ASSERT(activeTouchId >= 0);
5319
5320        mPointerGesture.currentGestureMode = PointerGesture::HOVER;
5321        if (mPointerGesture.lastGestureMode == PointerGesture::TAP) {
5322            if (when <= mPointerGesture.tapUpTime + mConfig.pointerGestureTapDragInterval) {
5323                float x, y;
5324                mPointerController->getPosition(&x, &y);
5325                if (fabs(x - mPointerGesture.tapX) <= mConfig.pointerGestureTapSlop
5326                        && fabs(y - mPointerGesture.tapY) <= mConfig.pointerGestureTapSlop) {
5327                    mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
5328                } else {
5329#if DEBUG_GESTURES
5330                    ALOGD("Gestures: Not a TAP_DRAG, deltaX=%f, deltaY=%f",
5331                            x - mPointerGesture.tapX,
5332                            y - mPointerGesture.tapY);
5333#endif
5334                }
5335            } else {
5336#if DEBUG_GESTURES
5337                ALOGD("Gestures: Not a TAP_DRAG, %0.3fms time since up",
5338                        (when - mPointerGesture.tapUpTime) * 0.000001f);
5339#endif
5340            }
5341        } else if (mPointerGesture.lastGestureMode == PointerGesture::TAP_DRAG) {
5342            mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
5343        }
5344
5345        if (mLastCookedState.fingerIdBits.hasBit(activeTouchId)) {
5346            const RawPointerData::Pointer& currentPointer =
5347                    mCurrentRawState.rawPointerData.pointerForId(activeTouchId);
5348            const RawPointerData::Pointer& lastPointer =
5349                    mLastRawState.rawPointerData.pointerForId(activeTouchId);
5350            float deltaX = (currentPointer.x - lastPointer.x)
5351                    * mPointerXMovementScale;
5352            float deltaY = (currentPointer.y - lastPointer.y)
5353                    * mPointerYMovementScale;
5354
5355            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5356            mPointerVelocityControl.move(when, &deltaX, &deltaY);
5357
5358            // Move the pointer using a relative motion.
5359            // When using spots, the hover or drag will occur at the position of the anchor spot.
5360            mPointerController->move(deltaX, deltaY);
5361        } else {
5362            mPointerVelocityControl.reset();
5363        }
5364
5365        bool down;
5366        if (mPointerGesture.currentGestureMode == PointerGesture::TAP_DRAG) {
5367#if DEBUG_GESTURES
5368            ALOGD("Gestures: TAP_DRAG");
5369#endif
5370            down = true;
5371        } else {
5372#if DEBUG_GESTURES
5373            ALOGD("Gestures: HOVER");
5374#endif
5375            if (mPointerGesture.lastGestureMode != PointerGesture::HOVER) {
5376                *outFinishPreviousGesture = true;
5377            }
5378            mPointerGesture.activeGestureId = 0;
5379            down = false;
5380        }
5381
5382        float x, y;
5383        mPointerController->getPosition(&x, &y);
5384
5385        mPointerGesture.currentGestureIdBits.clear();
5386        mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
5387        mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
5388        mPointerGesture.currentGestureProperties[0].clear();
5389        mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
5390        mPointerGesture.currentGestureProperties[0].toolType =
5391                AMOTION_EVENT_TOOL_TYPE_FINGER;
5392        mPointerGesture.currentGestureCoords[0].clear();
5393        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
5394        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5395        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
5396                down ? 1.0f : 0.0f);
5397
5398        if (lastFingerCount == 0 && currentFingerCount != 0) {
5399            mPointerGesture.resetTap();
5400            mPointerGesture.tapDownTime = when;
5401            mPointerGesture.tapX = x;
5402            mPointerGesture.tapY = y;
5403        }
5404    } else {
5405        // Case 5. At least two fingers down, button is not pressed. (PRESS, SWIPE or FREEFORM)
5406        // We need to provide feedback for each finger that goes down so we cannot wait
5407        // for the fingers to move before deciding what to do.
5408        //
5409        // The ambiguous case is deciding what to do when there are two fingers down but they
5410        // have not moved enough to determine whether they are part of a drag or part of a
5411        // freeform gesture, or just a press or long-press at the pointer location.
5412        //
5413        // When there are two fingers we start with the PRESS hypothesis and we generate a
5414        // down at the pointer location.
5415        //
5416        // When the two fingers move enough or when additional fingers are added, we make
5417        // a decision to transition into SWIPE or FREEFORM mode accordingly.
5418        ALOG_ASSERT(activeTouchId >= 0);
5419
5420        bool settled = when >= mPointerGesture.firstTouchTime
5421                + mConfig.pointerGestureMultitouchSettleInterval;
5422        if (mPointerGesture.lastGestureMode != PointerGesture::PRESS
5423                && mPointerGesture.lastGestureMode != PointerGesture::SWIPE
5424                && mPointerGesture.lastGestureMode != PointerGesture::FREEFORM) {
5425            *outFinishPreviousGesture = true;
5426        } else if (!settled && currentFingerCount > lastFingerCount) {
5427            // Additional pointers have gone down but not yet settled.
5428            // Reset the gesture.
5429#if DEBUG_GESTURES
5430            ALOGD("Gestures: Resetting gesture since additional pointers went down for MULTITOUCH, "
5431                    "settle time remaining %0.3fms", (mPointerGesture.firstTouchTime
5432                            + mConfig.pointerGestureMultitouchSettleInterval - when)
5433                            * 0.000001f);
5434#endif
5435            *outCancelPreviousGesture = true;
5436        } else {
5437            // Continue previous gesture.
5438            mPointerGesture.currentGestureMode = mPointerGesture.lastGestureMode;
5439        }
5440
5441        if (*outFinishPreviousGesture || *outCancelPreviousGesture) {
5442            mPointerGesture.currentGestureMode = PointerGesture::PRESS;
5443            mPointerGesture.activeGestureId = 0;
5444            mPointerGesture.referenceIdBits.clear();
5445            mPointerVelocityControl.reset();
5446
5447            // Use the centroid and pointer location as the reference points for the gesture.
5448#if DEBUG_GESTURES
5449            ALOGD("Gestures: Using centroid as reference for MULTITOUCH, "
5450                    "settle time remaining %0.3fms", (mPointerGesture.firstTouchTime
5451                            + mConfig.pointerGestureMultitouchSettleInterval - when)
5452                            * 0.000001f);
5453#endif
5454            mCurrentRawState.rawPointerData.getCentroidOfTouchingPointers(
5455                    &mPointerGesture.referenceTouchX,
5456                    &mPointerGesture.referenceTouchY);
5457            mPointerController->getPosition(&mPointerGesture.referenceGestureX,
5458                    &mPointerGesture.referenceGestureY);
5459        }
5460
5461        // Clear the reference deltas for fingers not yet included in the reference calculation.
5462        for (BitSet32 idBits(mCurrentCookedState.fingerIdBits.value
5463                & ~mPointerGesture.referenceIdBits.value); !idBits.isEmpty(); ) {
5464            uint32_t id = idBits.clearFirstMarkedBit();
5465            mPointerGesture.referenceDeltas[id].dx = 0;
5466            mPointerGesture.referenceDeltas[id].dy = 0;
5467        }
5468        mPointerGesture.referenceIdBits = mCurrentCookedState.fingerIdBits;
5469
5470        // Add delta for all fingers and calculate a common movement delta.
5471        float commonDeltaX = 0, commonDeltaY = 0;
5472        BitSet32 commonIdBits(mLastCookedState.fingerIdBits.value
5473                & mCurrentCookedState.fingerIdBits.value);
5474        for (BitSet32 idBits(commonIdBits); !idBits.isEmpty(); ) {
5475            bool first = (idBits == commonIdBits);
5476            uint32_t id = idBits.clearFirstMarkedBit();
5477            const RawPointerData::Pointer& cpd = mCurrentRawState.rawPointerData.pointerForId(id);
5478            const RawPointerData::Pointer& lpd = mLastRawState.rawPointerData.pointerForId(id);
5479            PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
5480            delta.dx += cpd.x - lpd.x;
5481            delta.dy += cpd.y - lpd.y;
5482
5483            if (first) {
5484                commonDeltaX = delta.dx;
5485                commonDeltaY = delta.dy;
5486            } else {
5487                commonDeltaX = calculateCommonVector(commonDeltaX, delta.dx);
5488                commonDeltaY = calculateCommonVector(commonDeltaY, delta.dy);
5489            }
5490        }
5491
5492        // Consider transitions from PRESS to SWIPE or MULTITOUCH.
5493        if (mPointerGesture.currentGestureMode == PointerGesture::PRESS) {
5494            float dist[MAX_POINTER_ID + 1];
5495            int32_t distOverThreshold = 0;
5496            for (BitSet32 idBits(mPointerGesture.referenceIdBits); !idBits.isEmpty(); ) {
5497                uint32_t id = idBits.clearFirstMarkedBit();
5498                PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
5499                dist[id] = hypotf(delta.dx * mPointerXZoomScale,
5500                        delta.dy * mPointerYZoomScale);
5501                if (dist[id] > mConfig.pointerGestureMultitouchMinDistance) {
5502                    distOverThreshold += 1;
5503                }
5504            }
5505
5506            // Only transition when at least two pointers have moved further than
5507            // the minimum distance threshold.
5508            if (distOverThreshold >= 2) {
5509                if (currentFingerCount > 2) {
5510                    // There are more than two pointers, switch to FREEFORM.
5511#if DEBUG_GESTURES
5512                    ALOGD("Gestures: PRESS transitioned to FREEFORM, number of pointers %d > 2",
5513                            currentFingerCount);
5514#endif
5515                    *outCancelPreviousGesture = true;
5516                    mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5517                } else {
5518                    // There are exactly two pointers.
5519                    BitSet32 idBits(mCurrentCookedState.fingerIdBits);
5520                    uint32_t id1 = idBits.clearFirstMarkedBit();
5521                    uint32_t id2 = idBits.firstMarkedBit();
5522                    const RawPointerData::Pointer& p1 =
5523                            mCurrentRawState.rawPointerData.pointerForId(id1);
5524                    const RawPointerData::Pointer& p2 =
5525                            mCurrentRawState.rawPointerData.pointerForId(id2);
5526                    float mutualDistance = distance(p1.x, p1.y, p2.x, p2.y);
5527                    if (mutualDistance > mPointerGestureMaxSwipeWidth) {
5528                        // There are two pointers but they are too far apart for a SWIPE,
5529                        // switch to FREEFORM.
5530#if DEBUG_GESTURES
5531                        ALOGD("Gestures: PRESS transitioned to FREEFORM, distance %0.3f > %0.3f",
5532                                mutualDistance, mPointerGestureMaxSwipeWidth);
5533#endif
5534                        *outCancelPreviousGesture = true;
5535                        mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5536                    } else {
5537                        // There are two pointers.  Wait for both pointers to start moving
5538                        // before deciding whether this is a SWIPE or FREEFORM gesture.
5539                        float dist1 = dist[id1];
5540                        float dist2 = dist[id2];
5541                        if (dist1 >= mConfig.pointerGestureMultitouchMinDistance
5542                                && dist2 >= mConfig.pointerGestureMultitouchMinDistance) {
5543                            // Calculate the dot product of the displacement vectors.
5544                            // When the vectors are oriented in approximately the same direction,
5545                            // the angle betweeen them is near zero and the cosine of the angle
5546                            // approches 1.0.  Recall that dot(v1, v2) = cos(angle) * mag(v1) * mag(v2).
5547                            PointerGesture::Delta& delta1 = mPointerGesture.referenceDeltas[id1];
5548                            PointerGesture::Delta& delta2 = mPointerGesture.referenceDeltas[id2];
5549                            float dx1 = delta1.dx * mPointerXZoomScale;
5550                            float dy1 = delta1.dy * mPointerYZoomScale;
5551                            float dx2 = delta2.dx * mPointerXZoomScale;
5552                            float dy2 = delta2.dy * mPointerYZoomScale;
5553                            float dot = dx1 * dx2 + dy1 * dy2;
5554                            float cosine = dot / (dist1 * dist2); // denominator always > 0
5555                            if (cosine >= mConfig.pointerGestureSwipeTransitionAngleCosine) {
5556                                // Pointers are moving in the same direction.  Switch to SWIPE.
5557#if DEBUG_GESTURES
5558                                ALOGD("Gestures: PRESS transitioned to SWIPE, "
5559                                        "dist1 %0.3f >= %0.3f, dist2 %0.3f >= %0.3f, "
5560                                        "cosine %0.3f >= %0.3f",
5561                                        dist1, mConfig.pointerGestureMultitouchMinDistance,
5562                                        dist2, mConfig.pointerGestureMultitouchMinDistance,
5563                                        cosine, mConfig.pointerGestureSwipeTransitionAngleCosine);
5564#endif
5565                                mPointerGesture.currentGestureMode = PointerGesture::SWIPE;
5566                            } else {
5567                                // Pointers are moving in different directions.  Switch to FREEFORM.
5568#if DEBUG_GESTURES
5569                                ALOGD("Gestures: PRESS transitioned to FREEFORM, "
5570                                        "dist1 %0.3f >= %0.3f, dist2 %0.3f >= %0.3f, "
5571                                        "cosine %0.3f < %0.3f",
5572                                        dist1, mConfig.pointerGestureMultitouchMinDistance,
5573                                        dist2, mConfig.pointerGestureMultitouchMinDistance,
5574                                        cosine, mConfig.pointerGestureSwipeTransitionAngleCosine);
5575#endif
5576                                *outCancelPreviousGesture = true;
5577                                mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5578                            }
5579                        }
5580                    }
5581                }
5582            }
5583        } else if (mPointerGesture.currentGestureMode == PointerGesture::SWIPE) {
5584            // Switch from SWIPE to FREEFORM if additional pointers go down.
5585            // Cancel previous gesture.
5586            if (currentFingerCount > 2) {
5587#if DEBUG_GESTURES
5588                ALOGD("Gestures: SWIPE transitioned to FREEFORM, number of pointers %d > 2",
5589                        currentFingerCount);
5590#endif
5591                *outCancelPreviousGesture = true;
5592                mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5593            }
5594        }
5595
5596        // Move the reference points based on the overall group motion of the fingers
5597        // except in PRESS mode while waiting for a transition to occur.
5598        if (mPointerGesture.currentGestureMode != PointerGesture::PRESS
5599                && (commonDeltaX || commonDeltaY)) {
5600            for (BitSet32 idBits(mPointerGesture.referenceIdBits); !idBits.isEmpty(); ) {
5601                uint32_t id = idBits.clearFirstMarkedBit();
5602                PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
5603                delta.dx = 0;
5604                delta.dy = 0;
5605            }
5606
5607            mPointerGesture.referenceTouchX += commonDeltaX;
5608            mPointerGesture.referenceTouchY += commonDeltaY;
5609
5610            commonDeltaX *= mPointerXMovementScale;
5611            commonDeltaY *= mPointerYMovementScale;
5612
5613            rotateDelta(mSurfaceOrientation, &commonDeltaX, &commonDeltaY);
5614            mPointerVelocityControl.move(when, &commonDeltaX, &commonDeltaY);
5615
5616            mPointerGesture.referenceGestureX += commonDeltaX;
5617            mPointerGesture.referenceGestureY += commonDeltaY;
5618        }
5619
5620        // Report gestures.
5621        if (mPointerGesture.currentGestureMode == PointerGesture::PRESS
5622                || mPointerGesture.currentGestureMode == PointerGesture::SWIPE) {
5623            // PRESS or SWIPE mode.
5624#if DEBUG_GESTURES
5625            ALOGD("Gestures: PRESS or SWIPE activeTouchId=%d,"
5626                    "activeGestureId=%d, currentTouchPointerCount=%d",
5627                    activeTouchId, mPointerGesture.activeGestureId, currentFingerCount);
5628#endif
5629            ALOG_ASSERT(mPointerGesture.activeGestureId >= 0);
5630
5631            mPointerGesture.currentGestureIdBits.clear();
5632            mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
5633            mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
5634            mPointerGesture.currentGestureProperties[0].clear();
5635            mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
5636            mPointerGesture.currentGestureProperties[0].toolType =
5637                    AMOTION_EVENT_TOOL_TYPE_FINGER;
5638            mPointerGesture.currentGestureCoords[0].clear();
5639            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X,
5640                    mPointerGesture.referenceGestureX);
5641            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y,
5642                    mPointerGesture.referenceGestureY);
5643            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5644        } else if (mPointerGesture.currentGestureMode == PointerGesture::FREEFORM) {
5645            // FREEFORM mode.
5646#if DEBUG_GESTURES
5647            ALOGD("Gestures: FREEFORM activeTouchId=%d,"
5648                    "activeGestureId=%d, currentTouchPointerCount=%d",
5649                    activeTouchId, mPointerGesture.activeGestureId, currentFingerCount);
5650#endif
5651            ALOG_ASSERT(mPointerGesture.activeGestureId >= 0);
5652
5653            mPointerGesture.currentGestureIdBits.clear();
5654
5655            BitSet32 mappedTouchIdBits;
5656            BitSet32 usedGestureIdBits;
5657            if (mPointerGesture.lastGestureMode != PointerGesture::FREEFORM) {
5658                // Initially, assign the active gesture id to the active touch point
5659                // if there is one.  No other touch id bits are mapped yet.
5660                if (!*outCancelPreviousGesture) {
5661                    mappedTouchIdBits.markBit(activeTouchId);
5662                    usedGestureIdBits.markBit(mPointerGesture.activeGestureId);
5663                    mPointerGesture.freeformTouchToGestureIdMap[activeTouchId] =
5664                            mPointerGesture.activeGestureId;
5665                } else {
5666                    mPointerGesture.activeGestureId = -1;
5667                }
5668            } else {
5669                // Otherwise, assume we mapped all touches from the previous frame.
5670                // Reuse all mappings that are still applicable.
5671                mappedTouchIdBits.value = mLastCookedState.fingerIdBits.value
5672                        & mCurrentCookedState.fingerIdBits.value;
5673                usedGestureIdBits = mPointerGesture.lastGestureIdBits;
5674
5675                // Check whether we need to choose a new active gesture id because the
5676                // current went went up.
5677                for (BitSet32 upTouchIdBits(mLastCookedState.fingerIdBits.value
5678                        & ~mCurrentCookedState.fingerIdBits.value);
5679                        !upTouchIdBits.isEmpty(); ) {
5680                    uint32_t upTouchId = upTouchIdBits.clearFirstMarkedBit();
5681                    uint32_t upGestureId = mPointerGesture.freeformTouchToGestureIdMap[upTouchId];
5682                    if (upGestureId == uint32_t(mPointerGesture.activeGestureId)) {
5683                        mPointerGesture.activeGestureId = -1;
5684                        break;
5685                    }
5686                }
5687            }
5688
5689#if DEBUG_GESTURES
5690            ALOGD("Gestures: FREEFORM follow up "
5691                    "mappedTouchIdBits=0x%08x, usedGestureIdBits=0x%08x, "
5692                    "activeGestureId=%d",
5693                    mappedTouchIdBits.value, usedGestureIdBits.value,
5694                    mPointerGesture.activeGestureId);
5695#endif
5696
5697            BitSet32 idBits(mCurrentCookedState.fingerIdBits);
5698            for (uint32_t i = 0; i < currentFingerCount; i++) {
5699                uint32_t touchId = idBits.clearFirstMarkedBit();
5700                uint32_t gestureId;
5701                if (!mappedTouchIdBits.hasBit(touchId)) {
5702                    gestureId = usedGestureIdBits.markFirstUnmarkedBit();
5703                    mPointerGesture.freeformTouchToGestureIdMap[touchId] = gestureId;
5704#if DEBUG_GESTURES
5705                    ALOGD("Gestures: FREEFORM "
5706                            "new mapping for touch id %d -> gesture id %d",
5707                            touchId, gestureId);
5708#endif
5709                } else {
5710                    gestureId = mPointerGesture.freeformTouchToGestureIdMap[touchId];
5711#if DEBUG_GESTURES
5712                    ALOGD("Gestures: FREEFORM "
5713                            "existing mapping for touch id %d -> gesture id %d",
5714                            touchId, gestureId);
5715#endif
5716                }
5717                mPointerGesture.currentGestureIdBits.markBit(gestureId);
5718                mPointerGesture.currentGestureIdToIndex[gestureId] = i;
5719
5720                const RawPointerData::Pointer& pointer =
5721                        mCurrentRawState.rawPointerData.pointerForId(touchId);
5722                float deltaX = (pointer.x - mPointerGesture.referenceTouchX)
5723                        * mPointerXZoomScale;
5724                float deltaY = (pointer.y - mPointerGesture.referenceTouchY)
5725                        * mPointerYZoomScale;
5726                rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5727
5728                mPointerGesture.currentGestureProperties[i].clear();
5729                mPointerGesture.currentGestureProperties[i].id = gestureId;
5730                mPointerGesture.currentGestureProperties[i].toolType =
5731                        AMOTION_EVENT_TOOL_TYPE_FINGER;
5732                mPointerGesture.currentGestureCoords[i].clear();
5733                mPointerGesture.currentGestureCoords[i].setAxisValue(
5734                        AMOTION_EVENT_AXIS_X, mPointerGesture.referenceGestureX + deltaX);
5735                mPointerGesture.currentGestureCoords[i].setAxisValue(
5736                        AMOTION_EVENT_AXIS_Y, mPointerGesture.referenceGestureY + deltaY);
5737                mPointerGesture.currentGestureCoords[i].setAxisValue(
5738                        AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5739            }
5740
5741            if (mPointerGesture.activeGestureId < 0) {
5742                mPointerGesture.activeGestureId =
5743                        mPointerGesture.currentGestureIdBits.firstMarkedBit();
5744#if DEBUG_GESTURES
5745                ALOGD("Gestures: FREEFORM new "
5746                        "activeGestureId=%d", mPointerGesture.activeGestureId);
5747#endif
5748            }
5749        }
5750    }
5751
5752    mPointerController->setButtonState(mCurrentRawState.buttonState);
5753
5754#if DEBUG_GESTURES
5755    ALOGD("Gestures: finishPreviousGesture=%s, cancelPreviousGesture=%s, "
5756            "currentGestureMode=%d, currentGestureIdBits=0x%08x, "
5757            "lastGestureMode=%d, lastGestureIdBits=0x%08x",
5758            toString(*outFinishPreviousGesture), toString(*outCancelPreviousGesture),
5759            mPointerGesture.currentGestureMode, mPointerGesture.currentGestureIdBits.value,
5760            mPointerGesture.lastGestureMode, mPointerGesture.lastGestureIdBits.value);
5761    for (BitSet32 idBits = mPointerGesture.currentGestureIdBits; !idBits.isEmpty(); ) {
5762        uint32_t id = idBits.clearFirstMarkedBit();
5763        uint32_t index = mPointerGesture.currentGestureIdToIndex[id];
5764        const PointerProperties& properties = mPointerGesture.currentGestureProperties[index];
5765        const PointerCoords& coords = mPointerGesture.currentGestureCoords[index];
5766        ALOGD("  currentGesture[%d]: index=%d, toolType=%d, "
5767                "x=%0.3f, y=%0.3f, pressure=%0.3f",
5768                id, index, properties.toolType,
5769                coords.getAxisValue(AMOTION_EVENT_AXIS_X),
5770                coords.getAxisValue(AMOTION_EVENT_AXIS_Y),
5771                coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
5772    }
5773    for (BitSet32 idBits = mPointerGesture.lastGestureIdBits; !idBits.isEmpty(); ) {
5774        uint32_t id = idBits.clearFirstMarkedBit();
5775        uint32_t index = mPointerGesture.lastGestureIdToIndex[id];
5776        const PointerProperties& properties = mPointerGesture.lastGestureProperties[index];
5777        const PointerCoords& coords = mPointerGesture.lastGestureCoords[index];
5778        ALOGD("  lastGesture[%d]: index=%d, toolType=%d, "
5779                "x=%0.3f, y=%0.3f, pressure=%0.3f",
5780                id, index, properties.toolType,
5781                coords.getAxisValue(AMOTION_EVENT_AXIS_X),
5782                coords.getAxisValue(AMOTION_EVENT_AXIS_Y),
5783                coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
5784    }
5785#endif
5786    return true;
5787}
5788
5789void TouchInputMapper::dispatchPointerStylus(nsecs_t when, uint32_t policyFlags) {
5790    mPointerSimple.currentCoords.clear();
5791    mPointerSimple.currentProperties.clear();
5792
5793    bool down, hovering;
5794    if (!mCurrentCookedState.stylusIdBits.isEmpty()) {
5795        uint32_t id = mCurrentCookedState.stylusIdBits.firstMarkedBit();
5796        uint32_t index = mCurrentCookedState.cookedPointerData.idToIndex[id];
5797        float x = mCurrentCookedState.cookedPointerData.pointerCoords[index].getX();
5798        float y = mCurrentCookedState.cookedPointerData.pointerCoords[index].getY();
5799        mPointerController->setPosition(x, y);
5800
5801        hovering = mCurrentCookedState.cookedPointerData.hoveringIdBits.hasBit(id);
5802        down = !hovering;
5803
5804        mPointerController->getPosition(&x, &y);
5805        mPointerSimple.currentCoords.copyFrom(
5806                mCurrentCookedState.cookedPointerData.pointerCoords[index]);
5807        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
5808        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5809        mPointerSimple.currentProperties.id = 0;
5810        mPointerSimple.currentProperties.toolType =
5811                mCurrentCookedState.cookedPointerData.pointerProperties[index].toolType;
5812    } else {
5813        down = false;
5814        hovering = false;
5815    }
5816
5817    dispatchPointerSimple(when, policyFlags, down, hovering);
5818}
5819
5820void TouchInputMapper::abortPointerStylus(nsecs_t when, uint32_t policyFlags) {
5821    abortPointerSimple(when, policyFlags);
5822}
5823
5824void TouchInputMapper::dispatchPointerMouse(nsecs_t when, uint32_t policyFlags) {
5825    mPointerSimple.currentCoords.clear();
5826    mPointerSimple.currentProperties.clear();
5827
5828    bool down, hovering;
5829    if (!mCurrentCookedState.mouseIdBits.isEmpty()) {
5830        uint32_t id = mCurrentCookedState.mouseIdBits.firstMarkedBit();
5831        uint32_t currentIndex = mCurrentRawState.rawPointerData.idToIndex[id];
5832        if (mLastCookedState.mouseIdBits.hasBit(id)) {
5833            uint32_t lastIndex = mCurrentRawState.rawPointerData.idToIndex[id];
5834            float deltaX = (mCurrentRawState.rawPointerData.pointers[currentIndex].x
5835                    - mLastRawState.rawPointerData.pointers[lastIndex].x)
5836                    * mPointerXMovementScale;
5837            float deltaY = (mCurrentRawState.rawPointerData.pointers[currentIndex].y
5838                    - mLastRawState.rawPointerData.pointers[lastIndex].y)
5839                    * mPointerYMovementScale;
5840
5841            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5842            mPointerVelocityControl.move(when, &deltaX, &deltaY);
5843
5844            mPointerController->move(deltaX, deltaY);
5845        } else {
5846            mPointerVelocityControl.reset();
5847        }
5848
5849        down = isPointerDown(mCurrentRawState.buttonState);
5850        hovering = !down;
5851
5852        float x, y;
5853        mPointerController->getPosition(&x, &y);
5854        mPointerSimple.currentCoords.copyFrom(
5855                mCurrentCookedState.cookedPointerData.pointerCoords[currentIndex]);
5856        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
5857        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5858        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
5859                hovering ? 0.0f : 1.0f);
5860        mPointerSimple.currentProperties.id = 0;
5861        mPointerSimple.currentProperties.toolType =
5862                mCurrentCookedState.cookedPointerData.pointerProperties[currentIndex].toolType;
5863    } else {
5864        mPointerVelocityControl.reset();
5865
5866        down = false;
5867        hovering = false;
5868    }
5869
5870    dispatchPointerSimple(when, policyFlags, down, hovering);
5871}
5872
5873void TouchInputMapper::abortPointerMouse(nsecs_t when, uint32_t policyFlags) {
5874    abortPointerSimple(when, policyFlags);
5875
5876    mPointerVelocityControl.reset();
5877}
5878
5879void TouchInputMapper::dispatchPointerSimple(nsecs_t when, uint32_t policyFlags,
5880        bool down, bool hovering) {
5881    int32_t metaState = getContext()->getGlobalMetaState();
5882
5883    if (mPointerController != NULL) {
5884        if (down || hovering) {
5885            mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
5886            mPointerController->clearSpots();
5887            mPointerController->setButtonState(mCurrentRawState.buttonState);
5888            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
5889        } else if (!down && !hovering && (mPointerSimple.down || mPointerSimple.hovering)) {
5890            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
5891        }
5892    }
5893
5894    if (mPointerSimple.down && !down) {
5895        mPointerSimple.down = false;
5896
5897        // Send up.
5898        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5899                 AMOTION_EVENT_ACTION_UP, 0, 0, metaState, mLastRawState.buttonState, 0,
5900                 mViewport.displayId,
5901                 1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
5902                 mOrientedXPrecision, mOrientedYPrecision,
5903                 mPointerSimple.downTime);
5904        getListener()->notifyMotion(&args);
5905    }
5906
5907    if (mPointerSimple.hovering && !hovering) {
5908        mPointerSimple.hovering = false;
5909
5910        // Send hover exit.
5911        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5912                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState, mLastRawState.buttonState, 0,
5913                mViewport.displayId,
5914                1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
5915                mOrientedXPrecision, mOrientedYPrecision,
5916                mPointerSimple.downTime);
5917        getListener()->notifyMotion(&args);
5918    }
5919
5920    if (down) {
5921        if (!mPointerSimple.down) {
5922            mPointerSimple.down = true;
5923            mPointerSimple.downTime = when;
5924
5925            // Send down.
5926            NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5927                    AMOTION_EVENT_ACTION_DOWN, 0, 0, metaState, mCurrentRawState.buttonState, 0,
5928                    mViewport.displayId,
5929                    1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
5930                    mOrientedXPrecision, mOrientedYPrecision,
5931                    mPointerSimple.downTime);
5932            getListener()->notifyMotion(&args);
5933        }
5934
5935        // Send move.
5936        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5937                AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, mCurrentRawState.buttonState, 0,
5938                mViewport.displayId,
5939                1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
5940                mOrientedXPrecision, mOrientedYPrecision,
5941                mPointerSimple.downTime);
5942        getListener()->notifyMotion(&args);
5943    }
5944
5945    if (hovering) {
5946        if (!mPointerSimple.hovering) {
5947            mPointerSimple.hovering = true;
5948
5949            // Send hover enter.
5950            NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5951                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, 0, metaState,
5952                    mCurrentRawState.buttonState, 0,
5953                    mViewport.displayId,
5954                    1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
5955                    mOrientedXPrecision, mOrientedYPrecision,
5956                    mPointerSimple.downTime);
5957            getListener()->notifyMotion(&args);
5958        }
5959
5960        // Send hover move.
5961        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5962                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
5963                mCurrentRawState.buttonState, 0,
5964                mViewport.displayId,
5965                1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
5966                mOrientedXPrecision, mOrientedYPrecision,
5967                mPointerSimple.downTime);
5968        getListener()->notifyMotion(&args);
5969    }
5970
5971    if (mCurrentRawState.rawVScroll || mCurrentRawState.rawHScroll) {
5972        float vscroll = mCurrentRawState.rawVScroll;
5973        float hscroll = mCurrentRawState.rawHScroll;
5974        mWheelYVelocityControl.move(when, NULL, &vscroll);
5975        mWheelXVelocityControl.move(when, &hscroll, NULL);
5976
5977        // Send scroll.
5978        PointerCoords pointerCoords;
5979        pointerCoords.copyFrom(mPointerSimple.currentCoords);
5980        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
5981        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
5982
5983        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5984                AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, mCurrentRawState.buttonState, 0,
5985                mViewport.displayId,
5986                1, &mPointerSimple.currentProperties, &pointerCoords,
5987                mOrientedXPrecision, mOrientedYPrecision,
5988                mPointerSimple.downTime);
5989        getListener()->notifyMotion(&args);
5990    }
5991
5992    // Save state.
5993    if (down || hovering) {
5994        mPointerSimple.lastCoords.copyFrom(mPointerSimple.currentCoords);
5995        mPointerSimple.lastProperties.copyFrom(mPointerSimple.currentProperties);
5996    } else {
5997        mPointerSimple.reset();
5998    }
5999}
6000
6001void TouchInputMapper::abortPointerSimple(nsecs_t when, uint32_t policyFlags) {
6002    mPointerSimple.currentCoords.clear();
6003    mPointerSimple.currentProperties.clear();
6004
6005    dispatchPointerSimple(when, policyFlags, false, false);
6006}
6007
6008void TouchInputMapper::dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
6009        int32_t action, int32_t actionButton, int32_t flags,
6010        int32_t metaState, int32_t buttonState, int32_t edgeFlags,
6011        const PointerProperties* properties, const PointerCoords* coords,
6012        const uint32_t* idToIndex, BitSet32 idBits, int32_t changedId,
6013        float xPrecision, float yPrecision, nsecs_t downTime) {
6014    PointerCoords pointerCoords[MAX_POINTERS];
6015    PointerProperties pointerProperties[MAX_POINTERS];
6016    uint32_t pointerCount = 0;
6017    while (!idBits.isEmpty()) {
6018        uint32_t id = idBits.clearFirstMarkedBit();
6019        uint32_t index = idToIndex[id];
6020        pointerProperties[pointerCount].copyFrom(properties[index]);
6021        pointerCoords[pointerCount].copyFrom(coords[index]);
6022
6023        if (changedId >= 0 && id == uint32_t(changedId)) {
6024            action |= pointerCount << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
6025        }
6026
6027        pointerCount += 1;
6028    }
6029
6030    ALOG_ASSERT(pointerCount != 0);
6031
6032    if (changedId >= 0 && pointerCount == 1) {
6033        // Replace initial down and final up action.
6034        // We can compare the action without masking off the changed pointer index
6035        // because we know the index is 0.
6036        if (action == AMOTION_EVENT_ACTION_POINTER_DOWN) {
6037            action = AMOTION_EVENT_ACTION_DOWN;
6038        } else if (action == AMOTION_EVENT_ACTION_POINTER_UP) {
6039            action = AMOTION_EVENT_ACTION_UP;
6040        } else {
6041            // Can't happen.
6042            ALOG_ASSERT(false);
6043        }
6044    }
6045
6046    NotifyMotionArgs args(when, getDeviceId(), source, policyFlags,
6047            action, actionButton, flags, metaState, buttonState, edgeFlags,
6048            mViewport.displayId, pointerCount, pointerProperties, pointerCoords,
6049            xPrecision, yPrecision, downTime);
6050    getListener()->notifyMotion(&args);
6051}
6052
6053bool TouchInputMapper::updateMovedPointers(const PointerProperties* inProperties,
6054        const PointerCoords* inCoords, const uint32_t* inIdToIndex,
6055        PointerProperties* outProperties, PointerCoords* outCoords, const uint32_t* outIdToIndex,
6056        BitSet32 idBits) const {
6057    bool changed = false;
6058    while (!idBits.isEmpty()) {
6059        uint32_t id = idBits.clearFirstMarkedBit();
6060        uint32_t inIndex = inIdToIndex[id];
6061        uint32_t outIndex = outIdToIndex[id];
6062
6063        const PointerProperties& curInProperties = inProperties[inIndex];
6064        const PointerCoords& curInCoords = inCoords[inIndex];
6065        PointerProperties& curOutProperties = outProperties[outIndex];
6066        PointerCoords& curOutCoords = outCoords[outIndex];
6067
6068        if (curInProperties != curOutProperties) {
6069            curOutProperties.copyFrom(curInProperties);
6070            changed = true;
6071        }
6072
6073        if (curInCoords != curOutCoords) {
6074            curOutCoords.copyFrom(curInCoords);
6075            changed = true;
6076        }
6077    }
6078    return changed;
6079}
6080
6081void TouchInputMapper::fadePointer() {
6082    if (mPointerController != NULL) {
6083        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
6084    }
6085}
6086
6087void TouchInputMapper::cancelTouch(nsecs_t when) {
6088    abortPointerUsage(when, 0 /*policyFlags*/);
6089}
6090
6091bool TouchInputMapper::isPointInsideSurface(int32_t x, int32_t y) {
6092    return x >= mRawPointerAxes.x.minValue && x <= mRawPointerAxes.x.maxValue
6093            && y >= mRawPointerAxes.y.minValue && y <= mRawPointerAxes.y.maxValue;
6094}
6095
6096const TouchInputMapper::VirtualKey* TouchInputMapper::findVirtualKeyHit(
6097        int32_t x, int32_t y) {
6098    size_t numVirtualKeys = mVirtualKeys.size();
6099    for (size_t i = 0; i < numVirtualKeys; i++) {
6100        const VirtualKey& virtualKey = mVirtualKeys[i];
6101
6102#if DEBUG_VIRTUAL_KEYS
6103        ALOGD("VirtualKeys: Hit test (%d, %d): keyCode=%d, scanCode=%d, "
6104                "left=%d, top=%d, right=%d, bottom=%d",
6105                x, y,
6106                virtualKey.keyCode, virtualKey.scanCode,
6107                virtualKey.hitLeft, virtualKey.hitTop,
6108                virtualKey.hitRight, virtualKey.hitBottom);
6109#endif
6110
6111        if (virtualKey.isHit(x, y)) {
6112            return & virtualKey;
6113        }
6114    }
6115
6116    return NULL;
6117}
6118
6119void TouchInputMapper::assignPointerIds(const RawState* last, RawState* current) {
6120    uint32_t currentPointerCount = current->rawPointerData.pointerCount;
6121    uint32_t lastPointerCount = last->rawPointerData.pointerCount;
6122
6123    current->rawPointerData.clearIdBits();
6124
6125    if (currentPointerCount == 0) {
6126        // No pointers to assign.
6127        return;
6128    }
6129
6130    if (lastPointerCount == 0) {
6131        // All pointers are new.
6132        for (uint32_t i = 0; i < currentPointerCount; i++) {
6133            uint32_t id = i;
6134            current->rawPointerData.pointers[i].id = id;
6135            current->rawPointerData.idToIndex[id] = i;
6136            current->rawPointerData.markIdBit(id, current->rawPointerData.isHovering(i));
6137        }
6138        return;
6139    }
6140
6141    if (currentPointerCount == 1 && lastPointerCount == 1
6142            && current->rawPointerData.pointers[0].toolType
6143                    == last->rawPointerData.pointers[0].toolType) {
6144        // Only one pointer and no change in count so it must have the same id as before.
6145        uint32_t id = last->rawPointerData.pointers[0].id;
6146        current->rawPointerData.pointers[0].id = id;
6147        current->rawPointerData.idToIndex[id] = 0;
6148        current->rawPointerData.markIdBit(id, current->rawPointerData.isHovering(0));
6149        return;
6150    }
6151
6152    // General case.
6153    // We build a heap of squared euclidean distances between current and last pointers
6154    // associated with the current and last pointer indices.  Then, we find the best
6155    // match (by distance) for each current pointer.
6156    // The pointers must have the same tool type but it is possible for them to
6157    // transition from hovering to touching or vice-versa while retaining the same id.
6158    PointerDistanceHeapElement heap[MAX_POINTERS * MAX_POINTERS];
6159
6160    uint32_t heapSize = 0;
6161    for (uint32_t currentPointerIndex = 0; currentPointerIndex < currentPointerCount;
6162            currentPointerIndex++) {
6163        for (uint32_t lastPointerIndex = 0; lastPointerIndex < lastPointerCount;
6164                lastPointerIndex++) {
6165            const RawPointerData::Pointer& currentPointer =
6166                    current->rawPointerData.pointers[currentPointerIndex];
6167            const RawPointerData::Pointer& lastPointer =
6168                    last->rawPointerData.pointers[lastPointerIndex];
6169            if (currentPointer.toolType == lastPointer.toolType) {
6170                int64_t deltaX = currentPointer.x - lastPointer.x;
6171                int64_t deltaY = currentPointer.y - lastPointer.y;
6172
6173                uint64_t distance = uint64_t(deltaX * deltaX + deltaY * deltaY);
6174
6175                // Insert new element into the heap (sift up).
6176                heap[heapSize].currentPointerIndex = currentPointerIndex;
6177                heap[heapSize].lastPointerIndex = lastPointerIndex;
6178                heap[heapSize].distance = distance;
6179                heapSize += 1;
6180            }
6181        }
6182    }
6183
6184    // Heapify
6185    for (uint32_t startIndex = heapSize / 2; startIndex != 0; ) {
6186        startIndex -= 1;
6187        for (uint32_t parentIndex = startIndex; ;) {
6188            uint32_t childIndex = parentIndex * 2 + 1;
6189            if (childIndex >= heapSize) {
6190                break;
6191            }
6192
6193            if (childIndex + 1 < heapSize
6194                    && heap[childIndex + 1].distance < heap[childIndex].distance) {
6195                childIndex += 1;
6196            }
6197
6198            if (heap[parentIndex].distance <= heap[childIndex].distance) {
6199                break;
6200            }
6201
6202            swap(heap[parentIndex], heap[childIndex]);
6203            parentIndex = childIndex;
6204        }
6205    }
6206
6207#if DEBUG_POINTER_ASSIGNMENT
6208    ALOGD("assignPointerIds - initial distance min-heap: size=%d", heapSize);
6209    for (size_t i = 0; i < heapSize; i++) {
6210        ALOGD("  heap[%d]: cur=%d, last=%d, distance=%lld",
6211                i, heap[i].currentPointerIndex, heap[i].lastPointerIndex,
6212                heap[i].distance);
6213    }
6214#endif
6215
6216    // Pull matches out by increasing order of distance.
6217    // To avoid reassigning pointers that have already been matched, the loop keeps track
6218    // of which last and current pointers have been matched using the matchedXXXBits variables.
6219    // It also tracks the used pointer id bits.
6220    BitSet32 matchedLastBits(0);
6221    BitSet32 matchedCurrentBits(0);
6222    BitSet32 usedIdBits(0);
6223    bool first = true;
6224    for (uint32_t i = min(currentPointerCount, lastPointerCount); heapSize > 0 && i > 0; i--) {
6225        while (heapSize > 0) {
6226            if (first) {
6227                // The first time through the loop, we just consume the root element of
6228                // the heap (the one with smallest distance).
6229                first = false;
6230            } else {
6231                // Previous iterations consumed the root element of the heap.
6232                // Pop root element off of the heap (sift down).
6233                heap[0] = heap[heapSize];
6234                for (uint32_t parentIndex = 0; ;) {
6235                    uint32_t childIndex = parentIndex * 2 + 1;
6236                    if (childIndex >= heapSize) {
6237                        break;
6238                    }
6239
6240                    if (childIndex + 1 < heapSize
6241                            && heap[childIndex + 1].distance < heap[childIndex].distance) {
6242                        childIndex += 1;
6243                    }
6244
6245                    if (heap[parentIndex].distance <= heap[childIndex].distance) {
6246                        break;
6247                    }
6248
6249                    swap(heap[parentIndex], heap[childIndex]);
6250                    parentIndex = childIndex;
6251                }
6252
6253#if DEBUG_POINTER_ASSIGNMENT
6254                ALOGD("assignPointerIds - reduced distance min-heap: size=%d", heapSize);
6255                for (size_t i = 0; i < heapSize; i++) {
6256                    ALOGD("  heap[%d]: cur=%d, last=%d, distance=%lld",
6257                            i, heap[i].currentPointerIndex, heap[i].lastPointerIndex,
6258                            heap[i].distance);
6259                }
6260#endif
6261            }
6262
6263            heapSize -= 1;
6264
6265            uint32_t currentPointerIndex = heap[0].currentPointerIndex;
6266            if (matchedCurrentBits.hasBit(currentPointerIndex)) continue; // already matched
6267
6268            uint32_t lastPointerIndex = heap[0].lastPointerIndex;
6269            if (matchedLastBits.hasBit(lastPointerIndex)) continue; // already matched
6270
6271            matchedCurrentBits.markBit(currentPointerIndex);
6272            matchedLastBits.markBit(lastPointerIndex);
6273
6274            uint32_t id = last->rawPointerData.pointers[lastPointerIndex].id;
6275            current->rawPointerData.pointers[currentPointerIndex].id = id;
6276            current->rawPointerData.idToIndex[id] = currentPointerIndex;
6277            current->rawPointerData.markIdBit(id,
6278                    current->rawPointerData.isHovering(currentPointerIndex));
6279            usedIdBits.markBit(id);
6280
6281#if DEBUG_POINTER_ASSIGNMENT
6282            ALOGD("assignPointerIds - matched: cur=%d, last=%d, id=%d, distance=%lld",
6283                    lastPointerIndex, currentPointerIndex, id, heap[0].distance);
6284#endif
6285            break;
6286        }
6287    }
6288
6289    // Assign fresh ids to pointers that were not matched in the process.
6290    for (uint32_t i = currentPointerCount - matchedCurrentBits.count(); i != 0; i--) {
6291        uint32_t currentPointerIndex = matchedCurrentBits.markFirstUnmarkedBit();
6292        uint32_t id = usedIdBits.markFirstUnmarkedBit();
6293
6294        current->rawPointerData.pointers[currentPointerIndex].id = id;
6295        current->rawPointerData.idToIndex[id] = currentPointerIndex;
6296        current->rawPointerData.markIdBit(id,
6297                current->rawPointerData.isHovering(currentPointerIndex));
6298
6299#if DEBUG_POINTER_ASSIGNMENT
6300        ALOGD("assignPointerIds - assigned: cur=%d, id=%d",
6301                currentPointerIndex, id);
6302#endif
6303    }
6304}
6305
6306int32_t TouchInputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
6307    if (mCurrentVirtualKey.down && mCurrentVirtualKey.keyCode == keyCode) {
6308        return AKEY_STATE_VIRTUAL;
6309    }
6310
6311    size_t numVirtualKeys = mVirtualKeys.size();
6312    for (size_t i = 0; i < numVirtualKeys; i++) {
6313        const VirtualKey& virtualKey = mVirtualKeys[i];
6314        if (virtualKey.keyCode == keyCode) {
6315            return AKEY_STATE_UP;
6316        }
6317    }
6318
6319    return AKEY_STATE_UNKNOWN;
6320}
6321
6322int32_t TouchInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
6323    if (mCurrentVirtualKey.down && mCurrentVirtualKey.scanCode == scanCode) {
6324        return AKEY_STATE_VIRTUAL;
6325    }
6326
6327    size_t numVirtualKeys = mVirtualKeys.size();
6328    for (size_t i = 0; i < numVirtualKeys; i++) {
6329        const VirtualKey& virtualKey = mVirtualKeys[i];
6330        if (virtualKey.scanCode == scanCode) {
6331            return AKEY_STATE_UP;
6332        }
6333    }
6334
6335    return AKEY_STATE_UNKNOWN;
6336}
6337
6338bool TouchInputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
6339        const int32_t* keyCodes, uint8_t* outFlags) {
6340    size_t numVirtualKeys = mVirtualKeys.size();
6341    for (size_t i = 0; i < numVirtualKeys; i++) {
6342        const VirtualKey& virtualKey = mVirtualKeys[i];
6343
6344        for (size_t i = 0; i < numCodes; i++) {
6345            if (virtualKey.keyCode == keyCodes[i]) {
6346                outFlags[i] = 1;
6347            }
6348        }
6349    }
6350
6351    return true;
6352}
6353
6354
6355// --- SingleTouchInputMapper ---
6356
6357SingleTouchInputMapper::SingleTouchInputMapper(InputDevice* device) :
6358        TouchInputMapper(device) {
6359}
6360
6361SingleTouchInputMapper::~SingleTouchInputMapper() {
6362}
6363
6364void SingleTouchInputMapper::reset(nsecs_t when) {
6365    mSingleTouchMotionAccumulator.reset(getDevice());
6366
6367    TouchInputMapper::reset(when);
6368}
6369
6370void SingleTouchInputMapper::process(const RawEvent* rawEvent) {
6371    TouchInputMapper::process(rawEvent);
6372
6373    mSingleTouchMotionAccumulator.process(rawEvent);
6374}
6375
6376void SingleTouchInputMapper::syncTouch(nsecs_t when, RawState* outState) {
6377    if (mTouchButtonAccumulator.isToolActive()) {
6378        outState->rawPointerData.pointerCount = 1;
6379        outState->rawPointerData.idToIndex[0] = 0;
6380
6381        bool isHovering = mTouchButtonAccumulator.getToolType() != AMOTION_EVENT_TOOL_TYPE_MOUSE
6382                && (mTouchButtonAccumulator.isHovering()
6383                        || (mRawPointerAxes.pressure.valid
6384                                && mSingleTouchMotionAccumulator.getAbsolutePressure() <= 0));
6385        outState->rawPointerData.markIdBit(0, isHovering);
6386
6387        RawPointerData::Pointer& outPointer = outState->rawPointerData.pointers[0];
6388        outPointer.id = 0;
6389        outPointer.x = mSingleTouchMotionAccumulator.getAbsoluteX();
6390        outPointer.y = mSingleTouchMotionAccumulator.getAbsoluteY();
6391        outPointer.pressure = mSingleTouchMotionAccumulator.getAbsolutePressure();
6392        outPointer.touchMajor = 0;
6393        outPointer.touchMinor = 0;
6394        outPointer.toolMajor = mSingleTouchMotionAccumulator.getAbsoluteToolWidth();
6395        outPointer.toolMinor = mSingleTouchMotionAccumulator.getAbsoluteToolWidth();
6396        outPointer.orientation = 0;
6397        outPointer.distance = mSingleTouchMotionAccumulator.getAbsoluteDistance();
6398        outPointer.tiltX = mSingleTouchMotionAccumulator.getAbsoluteTiltX();
6399        outPointer.tiltY = mSingleTouchMotionAccumulator.getAbsoluteTiltY();
6400        outPointer.toolType = mTouchButtonAccumulator.getToolType();
6401        if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6402            outPointer.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
6403        }
6404        outPointer.isHovering = isHovering;
6405    }
6406}
6407
6408void SingleTouchInputMapper::configureRawPointerAxes() {
6409    TouchInputMapper::configureRawPointerAxes();
6410
6411    getAbsoluteAxisInfo(ABS_X, &mRawPointerAxes.x);
6412    getAbsoluteAxisInfo(ABS_Y, &mRawPointerAxes.y);
6413    getAbsoluteAxisInfo(ABS_PRESSURE, &mRawPointerAxes.pressure);
6414    getAbsoluteAxisInfo(ABS_TOOL_WIDTH, &mRawPointerAxes.toolMajor);
6415    getAbsoluteAxisInfo(ABS_DISTANCE, &mRawPointerAxes.distance);
6416    getAbsoluteAxisInfo(ABS_TILT_X, &mRawPointerAxes.tiltX);
6417    getAbsoluteAxisInfo(ABS_TILT_Y, &mRawPointerAxes.tiltY);
6418}
6419
6420bool SingleTouchInputMapper::hasStylus() const {
6421    return mTouchButtonAccumulator.hasStylus();
6422}
6423
6424
6425// --- MultiTouchInputMapper ---
6426
6427MultiTouchInputMapper::MultiTouchInputMapper(InputDevice* device) :
6428        TouchInputMapper(device) {
6429}
6430
6431MultiTouchInputMapper::~MultiTouchInputMapper() {
6432}
6433
6434void MultiTouchInputMapper::reset(nsecs_t when) {
6435    mMultiTouchMotionAccumulator.reset(getDevice());
6436
6437    mPointerIdBits.clear();
6438
6439    TouchInputMapper::reset(when);
6440}
6441
6442void MultiTouchInputMapper::process(const RawEvent* rawEvent) {
6443    TouchInputMapper::process(rawEvent);
6444
6445    mMultiTouchMotionAccumulator.process(rawEvent);
6446}
6447
6448void MultiTouchInputMapper::syncTouch(nsecs_t when, RawState* outState) {
6449    size_t inCount = mMultiTouchMotionAccumulator.getSlotCount();
6450    size_t outCount = 0;
6451    BitSet32 newPointerIdBits;
6452
6453    for (size_t inIndex = 0; inIndex < inCount; inIndex++) {
6454        const MultiTouchMotionAccumulator::Slot* inSlot =
6455                mMultiTouchMotionAccumulator.getSlot(inIndex);
6456        if (!inSlot->isInUse()) {
6457            continue;
6458        }
6459
6460        if (outCount >= MAX_POINTERS) {
6461#if DEBUG_POINTERS
6462            ALOGD("MultiTouch device %s emitted more than maximum of %d pointers; "
6463                    "ignoring the rest.",
6464                    getDeviceName().string(), MAX_POINTERS);
6465#endif
6466            break; // too many fingers!
6467        }
6468
6469        RawPointerData::Pointer& outPointer = outState->rawPointerData.pointers[outCount];
6470        outPointer.x = inSlot->getX();
6471        outPointer.y = inSlot->getY();
6472        outPointer.pressure = inSlot->getPressure();
6473        outPointer.touchMajor = inSlot->getTouchMajor();
6474        outPointer.touchMinor = inSlot->getTouchMinor();
6475        outPointer.toolMajor = inSlot->getToolMajor();
6476        outPointer.toolMinor = inSlot->getToolMinor();
6477        outPointer.orientation = inSlot->getOrientation();
6478        outPointer.distance = inSlot->getDistance();
6479        outPointer.tiltX = 0;
6480        outPointer.tiltY = 0;
6481
6482        outPointer.toolType = inSlot->getToolType();
6483        if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6484            outPointer.toolType = mTouchButtonAccumulator.getToolType();
6485            if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6486                outPointer.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
6487            }
6488        }
6489
6490        bool isHovering = mTouchButtonAccumulator.getToolType() != AMOTION_EVENT_TOOL_TYPE_MOUSE
6491                && (mTouchButtonAccumulator.isHovering()
6492                        || (mRawPointerAxes.pressure.valid && inSlot->getPressure() <= 0));
6493        outPointer.isHovering = isHovering;
6494
6495        // Assign pointer id using tracking id if available.
6496        mHavePointerIds = true;
6497        int32_t trackingId = inSlot->getTrackingId();
6498        int32_t id = -1;
6499        if (trackingId >= 0) {
6500            for (BitSet32 idBits(mPointerIdBits); !idBits.isEmpty(); ) {
6501                uint32_t n = idBits.clearFirstMarkedBit();
6502                if (mPointerTrackingIdMap[n] == trackingId) {
6503                    id = n;
6504                }
6505            }
6506
6507            if (id < 0 && !mPointerIdBits.isFull()) {
6508                id = mPointerIdBits.markFirstUnmarkedBit();
6509                mPointerTrackingIdMap[id] = trackingId;
6510            }
6511        }
6512        if (id < 0) {
6513            mHavePointerIds = false;
6514            outState->rawPointerData.clearIdBits();
6515            newPointerIdBits.clear();
6516        } else {
6517            outPointer.id = id;
6518            outState->rawPointerData.idToIndex[id] = outCount;
6519            outState->rawPointerData.markIdBit(id, isHovering);
6520            newPointerIdBits.markBit(id);
6521        }
6522
6523        outCount += 1;
6524    }
6525
6526    outState->rawPointerData.pointerCount = outCount;
6527    mPointerIdBits = newPointerIdBits;
6528
6529    mMultiTouchMotionAccumulator.finishSync();
6530}
6531
6532void MultiTouchInputMapper::configureRawPointerAxes() {
6533    TouchInputMapper::configureRawPointerAxes();
6534
6535    getAbsoluteAxisInfo(ABS_MT_POSITION_X, &mRawPointerAxes.x);
6536    getAbsoluteAxisInfo(ABS_MT_POSITION_Y, &mRawPointerAxes.y);
6537    getAbsoluteAxisInfo(ABS_MT_TOUCH_MAJOR, &mRawPointerAxes.touchMajor);
6538    getAbsoluteAxisInfo(ABS_MT_TOUCH_MINOR, &mRawPointerAxes.touchMinor);
6539    getAbsoluteAxisInfo(ABS_MT_WIDTH_MAJOR, &mRawPointerAxes.toolMajor);
6540    getAbsoluteAxisInfo(ABS_MT_WIDTH_MINOR, &mRawPointerAxes.toolMinor);
6541    getAbsoluteAxisInfo(ABS_MT_ORIENTATION, &mRawPointerAxes.orientation);
6542    getAbsoluteAxisInfo(ABS_MT_PRESSURE, &mRawPointerAxes.pressure);
6543    getAbsoluteAxisInfo(ABS_MT_DISTANCE, &mRawPointerAxes.distance);
6544    getAbsoluteAxisInfo(ABS_MT_TRACKING_ID, &mRawPointerAxes.trackingId);
6545    getAbsoluteAxisInfo(ABS_MT_SLOT, &mRawPointerAxes.slot);
6546
6547    if (mRawPointerAxes.trackingId.valid
6548            && mRawPointerAxes.slot.valid
6549            && mRawPointerAxes.slot.minValue == 0 && mRawPointerAxes.slot.maxValue > 0) {
6550        size_t slotCount = mRawPointerAxes.slot.maxValue + 1;
6551        if (slotCount > MAX_SLOTS) {
6552            ALOGW("MultiTouch Device %s reported %zu slots but the framework "
6553                    "only supports a maximum of %zu slots at this time.",
6554                    getDeviceName().string(), slotCount, MAX_SLOTS);
6555            slotCount = MAX_SLOTS;
6556        }
6557        mMultiTouchMotionAccumulator.configure(getDevice(),
6558                slotCount, true /*usingSlotsProtocol*/);
6559    } else {
6560        mMultiTouchMotionAccumulator.configure(getDevice(),
6561                MAX_POINTERS, false /*usingSlotsProtocol*/);
6562    }
6563}
6564
6565bool MultiTouchInputMapper::hasStylus() const {
6566    return mMultiTouchMotionAccumulator.hasStylus()
6567            || mTouchButtonAccumulator.hasStylus();
6568}
6569
6570// --- ExternalStylusInputMapper
6571
6572ExternalStylusInputMapper::ExternalStylusInputMapper(InputDevice* device) :
6573    InputMapper(device) {
6574
6575}
6576
6577uint32_t ExternalStylusInputMapper::getSources() {
6578    return AINPUT_SOURCE_STYLUS;
6579}
6580
6581void ExternalStylusInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
6582    InputMapper::populateDeviceInfo(info);
6583    info->addMotionRange(AMOTION_EVENT_AXIS_PRESSURE, AINPUT_SOURCE_STYLUS,
6584            0.0f, 1.0f, 0.0f, 0.0f, 0.0f);
6585}
6586
6587void ExternalStylusInputMapper::dump(String8& dump) {
6588    dump.append(INDENT2 "External Stylus Input Mapper:\n");
6589    dump.append(INDENT3 "Raw Stylus Axes:\n");
6590    dumpRawAbsoluteAxisInfo(dump, mRawPressureAxis, "Pressure");
6591    dump.append(INDENT3 "Stylus State:\n");
6592    dumpStylusState(dump, mStylusState);
6593}
6594
6595void ExternalStylusInputMapper::configure(nsecs_t when,
6596        const InputReaderConfiguration* config, uint32_t changes) {
6597    getAbsoluteAxisInfo(ABS_PRESSURE, &mRawPressureAxis);
6598    mTouchButtonAccumulator.configure(getDevice());
6599}
6600
6601void ExternalStylusInputMapper::reset(nsecs_t when) {
6602    InputDevice* device = getDevice();
6603    mSingleTouchMotionAccumulator.reset(device);
6604    mTouchButtonAccumulator.reset(device);
6605    InputMapper::reset(when);
6606}
6607
6608void ExternalStylusInputMapper::process(const RawEvent* rawEvent) {
6609    mSingleTouchMotionAccumulator.process(rawEvent);
6610    mTouchButtonAccumulator.process(rawEvent);
6611
6612    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
6613        sync(rawEvent->when);
6614    }
6615}
6616
6617void ExternalStylusInputMapper::sync(nsecs_t when) {
6618    mStylusState.clear();
6619
6620    mStylusState.when = when;
6621
6622    mStylusState.toolType = mTouchButtonAccumulator.getToolType();
6623    if (mStylusState.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6624        mStylusState.toolType = AMOTION_EVENT_TOOL_TYPE_STYLUS;
6625    }
6626
6627    int32_t pressure = mSingleTouchMotionAccumulator.getAbsolutePressure();
6628    if (mRawPressureAxis.valid) {
6629        mStylusState.pressure = float(pressure) / mRawPressureAxis.maxValue;
6630    } else if (mTouchButtonAccumulator.isToolActive()) {
6631        mStylusState.pressure = 1.0f;
6632    } else {
6633        mStylusState.pressure = 0.0f;
6634    }
6635
6636    mStylusState.buttons = mTouchButtonAccumulator.getButtonState();
6637
6638    mContext->dispatchExternalStylusState(mStylusState);
6639}
6640
6641
6642// --- JoystickInputMapper ---
6643
6644JoystickInputMapper::JoystickInputMapper(InputDevice* device) :
6645        InputMapper(device) {
6646}
6647
6648JoystickInputMapper::~JoystickInputMapper() {
6649}
6650
6651uint32_t JoystickInputMapper::getSources() {
6652    return AINPUT_SOURCE_JOYSTICK;
6653}
6654
6655void JoystickInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
6656    InputMapper::populateDeviceInfo(info);
6657
6658    for (size_t i = 0; i < mAxes.size(); i++) {
6659        const Axis& axis = mAxes.valueAt(i);
6660        addMotionRange(axis.axisInfo.axis, axis, info);
6661
6662        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
6663            addMotionRange(axis.axisInfo.highAxis, axis, info);
6664
6665        }
6666    }
6667}
6668
6669void JoystickInputMapper::addMotionRange(int32_t axisId, const Axis& axis,
6670        InputDeviceInfo* info) {
6671    info->addMotionRange(axisId, AINPUT_SOURCE_JOYSTICK,
6672            axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
6673    /* In order to ease the transition for developers from using the old axes
6674     * to the newer, more semantically correct axes, we'll continue to register
6675     * the old axes as duplicates of their corresponding new ones.  */
6676    int32_t compatAxis = getCompatAxis(axisId);
6677    if (compatAxis >= 0) {
6678        info->addMotionRange(compatAxis, AINPUT_SOURCE_JOYSTICK,
6679                axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
6680    }
6681}
6682
6683/* A mapping from axes the joystick actually has to the axes that should be
6684 * artificially created for compatibility purposes.
6685 * Returns -1 if no compatibility axis is needed. */
6686int32_t JoystickInputMapper::getCompatAxis(int32_t axis) {
6687    switch(axis) {
6688    case AMOTION_EVENT_AXIS_LTRIGGER:
6689        return AMOTION_EVENT_AXIS_BRAKE;
6690    case AMOTION_EVENT_AXIS_RTRIGGER:
6691        return AMOTION_EVENT_AXIS_GAS;
6692    }
6693    return -1;
6694}
6695
6696void JoystickInputMapper::dump(String8& dump) {
6697    dump.append(INDENT2 "Joystick Input Mapper:\n");
6698
6699    dump.append(INDENT3 "Axes:\n");
6700    size_t numAxes = mAxes.size();
6701    for (size_t i = 0; i < numAxes; i++) {
6702        const Axis& axis = mAxes.valueAt(i);
6703        const char* label = getAxisLabel(axis.axisInfo.axis);
6704        if (label) {
6705            dump.appendFormat(INDENT4 "%s", label);
6706        } else {
6707            dump.appendFormat(INDENT4 "%d", axis.axisInfo.axis);
6708        }
6709        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
6710            label = getAxisLabel(axis.axisInfo.highAxis);
6711            if (label) {
6712                dump.appendFormat(" / %s (split at %d)", label, axis.axisInfo.splitValue);
6713            } else {
6714                dump.appendFormat(" / %d (split at %d)", axis.axisInfo.highAxis,
6715                        axis.axisInfo.splitValue);
6716            }
6717        } else if (axis.axisInfo.mode == AxisInfo::MODE_INVERT) {
6718            dump.append(" (invert)");
6719        }
6720
6721        dump.appendFormat(": min=%0.5f, max=%0.5f, flat=%0.5f, fuzz=%0.5f, resolution=%0.5f\n",
6722                axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
6723        dump.appendFormat(INDENT4 "  scale=%0.5f, offset=%0.5f, "
6724                "highScale=%0.5f, highOffset=%0.5f\n",
6725                axis.scale, axis.offset, axis.highScale, axis.highOffset);
6726        dump.appendFormat(INDENT4 "  rawAxis=%d, rawMin=%d, rawMax=%d, "
6727                "rawFlat=%d, rawFuzz=%d, rawResolution=%d\n",
6728                mAxes.keyAt(i), axis.rawAxisInfo.minValue, axis.rawAxisInfo.maxValue,
6729                axis.rawAxisInfo.flat, axis.rawAxisInfo.fuzz, axis.rawAxisInfo.resolution);
6730    }
6731}
6732
6733void JoystickInputMapper::configure(nsecs_t when,
6734        const InputReaderConfiguration* config, uint32_t changes) {
6735    InputMapper::configure(when, config, changes);
6736
6737    if (!changes) { // first time only
6738        // Collect all axes.
6739        for (int32_t abs = 0; abs <= ABS_MAX; abs++) {
6740            if (!(getAbsAxisUsage(abs, getDevice()->getClasses())
6741                    & INPUT_DEVICE_CLASS_JOYSTICK)) {
6742                continue; // axis must be claimed by a different device
6743            }
6744
6745            RawAbsoluteAxisInfo rawAxisInfo;
6746            getAbsoluteAxisInfo(abs, &rawAxisInfo);
6747            if (rawAxisInfo.valid) {
6748                // Map axis.
6749                AxisInfo axisInfo;
6750                bool explicitlyMapped = !getEventHub()->mapAxis(getDeviceId(), abs, &axisInfo);
6751                if (!explicitlyMapped) {
6752                    // Axis is not explicitly mapped, will choose a generic axis later.
6753                    axisInfo.mode = AxisInfo::MODE_NORMAL;
6754                    axisInfo.axis = -1;
6755                }
6756
6757                // Apply flat override.
6758                int32_t rawFlat = axisInfo.flatOverride < 0
6759                        ? rawAxisInfo.flat : axisInfo.flatOverride;
6760
6761                // Calculate scaling factors and limits.
6762                Axis axis;
6763                if (axisInfo.mode == AxisInfo::MODE_SPLIT) {
6764                    float scale = 1.0f / (axisInfo.splitValue - rawAxisInfo.minValue);
6765                    float highScale = 1.0f / (rawAxisInfo.maxValue - axisInfo.splitValue);
6766                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
6767                            scale, 0.0f, highScale, 0.0f,
6768                            0.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
6769                            rawAxisInfo.resolution * scale);
6770                } else if (isCenteredAxis(axisInfo.axis)) {
6771                    float scale = 2.0f / (rawAxisInfo.maxValue - rawAxisInfo.minValue);
6772                    float offset = avg(rawAxisInfo.minValue, rawAxisInfo.maxValue) * -scale;
6773                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
6774                            scale, offset, scale, offset,
6775                            -1.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
6776                            rawAxisInfo.resolution * scale);
6777                } else {
6778                    float scale = 1.0f / (rawAxisInfo.maxValue - rawAxisInfo.minValue);
6779                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
6780                            scale, 0.0f, scale, 0.0f,
6781                            0.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
6782                            rawAxisInfo.resolution * scale);
6783                }
6784
6785                // To eliminate noise while the joystick is at rest, filter out small variations
6786                // in axis values up front.
6787                axis.filter = axis.fuzz ? axis.fuzz : axis.flat * 0.25f;
6788
6789                mAxes.add(abs, axis);
6790            }
6791        }
6792
6793        // If there are too many axes, start dropping them.
6794        // Prefer to keep explicitly mapped axes.
6795        if (mAxes.size() > PointerCoords::MAX_AXES) {
6796            ALOGI("Joystick '%s' has %zu axes but the framework only supports a maximum of %d.",
6797                    getDeviceName().string(), mAxes.size(), PointerCoords::MAX_AXES);
6798            pruneAxes(true);
6799            pruneAxes(false);
6800        }
6801
6802        // Assign generic axis ids to remaining axes.
6803        int32_t nextGenericAxisId = AMOTION_EVENT_AXIS_GENERIC_1;
6804        size_t numAxes = mAxes.size();
6805        for (size_t i = 0; i < numAxes; i++) {
6806            Axis& axis = mAxes.editValueAt(i);
6807            if (axis.axisInfo.axis < 0) {
6808                while (nextGenericAxisId <= AMOTION_EVENT_AXIS_GENERIC_16
6809                        && haveAxis(nextGenericAxisId)) {
6810                    nextGenericAxisId += 1;
6811                }
6812
6813                if (nextGenericAxisId <= AMOTION_EVENT_AXIS_GENERIC_16) {
6814                    axis.axisInfo.axis = nextGenericAxisId;
6815                    nextGenericAxisId += 1;
6816                } else {
6817                    ALOGI("Ignoring joystick '%s' axis %d because all of the generic axis ids "
6818                            "have already been assigned to other axes.",
6819                            getDeviceName().string(), mAxes.keyAt(i));
6820                    mAxes.removeItemsAt(i--);
6821                    numAxes -= 1;
6822                }
6823            }
6824        }
6825    }
6826}
6827
6828bool JoystickInputMapper::haveAxis(int32_t axisId) {
6829    size_t numAxes = mAxes.size();
6830    for (size_t i = 0; i < numAxes; i++) {
6831        const Axis& axis = mAxes.valueAt(i);
6832        if (axis.axisInfo.axis == axisId
6833                || (axis.axisInfo.mode == AxisInfo::MODE_SPLIT
6834                        && axis.axisInfo.highAxis == axisId)) {
6835            return true;
6836        }
6837    }
6838    return false;
6839}
6840
6841void JoystickInputMapper::pruneAxes(bool ignoreExplicitlyMappedAxes) {
6842    size_t i = mAxes.size();
6843    while (mAxes.size() > PointerCoords::MAX_AXES && i-- > 0) {
6844        if (ignoreExplicitlyMappedAxes && mAxes.valueAt(i).explicitlyMapped) {
6845            continue;
6846        }
6847        ALOGI("Discarding joystick '%s' axis %d because there are too many axes.",
6848                getDeviceName().string(), mAxes.keyAt(i));
6849        mAxes.removeItemsAt(i);
6850    }
6851}
6852
6853bool JoystickInputMapper::isCenteredAxis(int32_t axis) {
6854    switch (axis) {
6855    case AMOTION_EVENT_AXIS_X:
6856    case AMOTION_EVENT_AXIS_Y:
6857    case AMOTION_EVENT_AXIS_Z:
6858    case AMOTION_EVENT_AXIS_RX:
6859    case AMOTION_EVENT_AXIS_RY:
6860    case AMOTION_EVENT_AXIS_RZ:
6861    case AMOTION_EVENT_AXIS_HAT_X:
6862    case AMOTION_EVENT_AXIS_HAT_Y:
6863    case AMOTION_EVENT_AXIS_ORIENTATION:
6864    case AMOTION_EVENT_AXIS_RUDDER:
6865    case AMOTION_EVENT_AXIS_WHEEL:
6866        return true;
6867    default:
6868        return false;
6869    }
6870}
6871
6872void JoystickInputMapper::reset(nsecs_t when) {
6873    // Recenter all axes.
6874    size_t numAxes = mAxes.size();
6875    for (size_t i = 0; i < numAxes; i++) {
6876        Axis& axis = mAxes.editValueAt(i);
6877        axis.resetValue();
6878    }
6879
6880    InputMapper::reset(when);
6881}
6882
6883void JoystickInputMapper::process(const RawEvent* rawEvent) {
6884    switch (rawEvent->type) {
6885    case EV_ABS: {
6886        ssize_t index = mAxes.indexOfKey(rawEvent->code);
6887        if (index >= 0) {
6888            Axis& axis = mAxes.editValueAt(index);
6889            float newValue, highNewValue;
6890            switch (axis.axisInfo.mode) {
6891            case AxisInfo::MODE_INVERT:
6892                newValue = (axis.rawAxisInfo.maxValue - rawEvent->value)
6893                        * axis.scale + axis.offset;
6894                highNewValue = 0.0f;
6895                break;
6896            case AxisInfo::MODE_SPLIT:
6897                if (rawEvent->value < axis.axisInfo.splitValue) {
6898                    newValue = (axis.axisInfo.splitValue - rawEvent->value)
6899                            * axis.scale + axis.offset;
6900                    highNewValue = 0.0f;
6901                } else if (rawEvent->value > axis.axisInfo.splitValue) {
6902                    newValue = 0.0f;
6903                    highNewValue = (rawEvent->value - axis.axisInfo.splitValue)
6904                            * axis.highScale + axis.highOffset;
6905                } else {
6906                    newValue = 0.0f;
6907                    highNewValue = 0.0f;
6908                }
6909                break;
6910            default:
6911                newValue = rawEvent->value * axis.scale + axis.offset;
6912                highNewValue = 0.0f;
6913                break;
6914            }
6915            axis.newValue = newValue;
6916            axis.highNewValue = highNewValue;
6917        }
6918        break;
6919    }
6920
6921    case EV_SYN:
6922        switch (rawEvent->code) {
6923        case SYN_REPORT:
6924            sync(rawEvent->when, false /*force*/);
6925            break;
6926        }
6927        break;
6928    }
6929}
6930
6931void JoystickInputMapper::sync(nsecs_t when, bool force) {
6932    if (!filterAxes(force)) {
6933        return;
6934    }
6935
6936    int32_t metaState = mContext->getGlobalMetaState();
6937    int32_t buttonState = 0;
6938
6939    PointerProperties pointerProperties;
6940    pointerProperties.clear();
6941    pointerProperties.id = 0;
6942    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
6943
6944    PointerCoords pointerCoords;
6945    pointerCoords.clear();
6946
6947    size_t numAxes = mAxes.size();
6948    for (size_t i = 0; i < numAxes; i++) {
6949        const Axis& axis = mAxes.valueAt(i);
6950        setPointerCoordsAxisValue(&pointerCoords, axis.axisInfo.axis, axis.currentValue);
6951        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
6952            setPointerCoordsAxisValue(&pointerCoords, axis.axisInfo.highAxis,
6953                    axis.highCurrentValue);
6954        }
6955    }
6956
6957    // Moving a joystick axis should not wake the device because joysticks can
6958    // be fairly noisy even when not in use.  On the other hand, pushing a gamepad
6959    // button will likely wake the device.
6960    // TODO: Use the input device configuration to control this behavior more finely.
6961    uint32_t policyFlags = 0;
6962
6963    NotifyMotionArgs args(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, policyFlags,
6964            AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
6965            ADISPLAY_ID_NONE, 1, &pointerProperties, &pointerCoords, 0, 0, 0);
6966    getListener()->notifyMotion(&args);
6967}
6968
6969void JoystickInputMapper::setPointerCoordsAxisValue(PointerCoords* pointerCoords,
6970        int32_t axis, float value) {
6971    pointerCoords->setAxisValue(axis, value);
6972    /* In order to ease the transition for developers from using the old axes
6973     * to the newer, more semantically correct axes, we'll continue to produce
6974     * values for the old axes as mirrors of the value of their corresponding
6975     * new axes. */
6976    int32_t compatAxis = getCompatAxis(axis);
6977    if (compatAxis >= 0) {
6978        pointerCoords->setAxisValue(compatAxis, value);
6979    }
6980}
6981
6982bool JoystickInputMapper::filterAxes(bool force) {
6983    bool atLeastOneSignificantChange = force;
6984    size_t numAxes = mAxes.size();
6985    for (size_t i = 0; i < numAxes; i++) {
6986        Axis& axis = mAxes.editValueAt(i);
6987        if (force || hasValueChangedSignificantly(axis.filter,
6988                axis.newValue, axis.currentValue, axis.min, axis.max)) {
6989            axis.currentValue = axis.newValue;
6990            atLeastOneSignificantChange = true;
6991        }
6992        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
6993            if (force || hasValueChangedSignificantly(axis.filter,
6994                    axis.highNewValue, axis.highCurrentValue, axis.min, axis.max)) {
6995                axis.highCurrentValue = axis.highNewValue;
6996                atLeastOneSignificantChange = true;
6997            }
6998        }
6999    }
7000    return atLeastOneSignificantChange;
7001}
7002
7003bool JoystickInputMapper::hasValueChangedSignificantly(
7004        float filter, float newValue, float currentValue, float min, float max) {
7005    if (newValue != currentValue) {
7006        // Filter out small changes in value unless the value is converging on the axis
7007        // bounds or center point.  This is intended to reduce the amount of information
7008        // sent to applications by particularly noisy joysticks (such as PS3).
7009        if (fabs(newValue - currentValue) > filter
7010                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, min)
7011                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, max)
7012                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, 0)) {
7013            return true;
7014        }
7015    }
7016    return false;
7017}
7018
7019bool JoystickInputMapper::hasMovedNearerToValueWithinFilteredRange(
7020        float filter, float newValue, float currentValue, float thresholdValue) {
7021    float newDistance = fabs(newValue - thresholdValue);
7022    if (newDistance < filter) {
7023        float oldDistance = fabs(currentValue - thresholdValue);
7024        if (newDistance < oldDistance) {
7025            return true;
7026        }
7027    }
7028    return false;
7029}
7030
7031} // namespace android
7032