InputReader.cpp revision 1941ff5815e9f8a09f6ae643addbb4119482cf16 
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    // Scroll wheel-like devices.
454    if (classes & INPUT_DEVICE_CLASS_ROTARY_ENCODER) {
455        device->addMapper(new RotaryEncoderInputMapper(device));
456    }
457
458    // Vibrator-like devices.
459    if (classes & INPUT_DEVICE_CLASS_VIBRATOR) {
460        device->addMapper(new VibratorInputMapper(device));
461    }
462
463    // Keyboard-like devices.
464    uint32_t keyboardSource = 0;
465    int32_t keyboardType = AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC;
466    if (classes & INPUT_DEVICE_CLASS_KEYBOARD) {
467        keyboardSource |= AINPUT_SOURCE_KEYBOARD;
468    }
469    if (classes & INPUT_DEVICE_CLASS_ALPHAKEY) {
470        keyboardType = AINPUT_KEYBOARD_TYPE_ALPHABETIC;
471    }
472    if (classes & INPUT_DEVICE_CLASS_DPAD) {
473        keyboardSource |= AINPUT_SOURCE_DPAD;
474    }
475    if (classes & INPUT_DEVICE_CLASS_GAMEPAD) {
476        keyboardSource |= AINPUT_SOURCE_GAMEPAD;
477    }
478
479    if (keyboardSource != 0) {
480        device->addMapper(new KeyboardInputMapper(device, keyboardSource, keyboardType));
481    }
482
483    // Cursor-like devices.
484    if (classes & INPUT_DEVICE_CLASS_CURSOR) {
485        device->addMapper(new CursorInputMapper(device));
486    }
487
488    // Touchscreens and touchpad devices.
489    if (classes & INPUT_DEVICE_CLASS_TOUCH_MT) {
490        device->addMapper(new MultiTouchInputMapper(device));
491    } else if (classes & INPUT_DEVICE_CLASS_TOUCH) {
492        device->addMapper(new SingleTouchInputMapper(device));
493    }
494
495    // Joystick-like devices.
496    if (classes & INPUT_DEVICE_CLASS_JOYSTICK) {
497        device->addMapper(new JoystickInputMapper(device));
498    }
499
500    // External stylus-like devices.
501    if (classes & INPUT_DEVICE_CLASS_EXTERNAL_STYLUS) {
502        device->addMapper(new ExternalStylusInputMapper(device));
503    }
504
505    return device;
506}
507
508void InputReader::processEventsForDeviceLocked(int32_t deviceId,
509        const RawEvent* rawEvents, size_t count) {
510    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
511    if (deviceIndex < 0) {
512        ALOGW("Discarding event for unknown deviceId %d.", deviceId);
513        return;
514    }
515
516    InputDevice* device = mDevices.valueAt(deviceIndex);
517    if (device->isIgnored()) {
518        //ALOGD("Discarding event for ignored deviceId %d.", deviceId);
519        return;
520    }
521
522    device->process(rawEvents, count);
523}
524
525void InputReader::timeoutExpiredLocked(nsecs_t when) {
526    for (size_t i = 0; i < mDevices.size(); i++) {
527        InputDevice* device = mDevices.valueAt(i);
528        if (!device->isIgnored()) {
529            device->timeoutExpired(when);
530        }
531    }
532}
533
534void InputReader::handleConfigurationChangedLocked(nsecs_t when) {
535    // Reset global meta state because it depends on the list of all configured devices.
536    updateGlobalMetaStateLocked();
537
538    // Enqueue configuration changed.
539    NotifyConfigurationChangedArgs args(when);
540    mQueuedListener->notifyConfigurationChanged(&args);
541}
542
543void InputReader::refreshConfigurationLocked(uint32_t changes) {
544    mPolicy->getReaderConfiguration(&mConfig);
545    mEventHub->setExcludedDevices(mConfig.excludedDeviceNames);
546
547    if (changes) {
548        ALOGI("Reconfiguring input devices.  changes=0x%08x", changes);
549        nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
550
551        if (changes & InputReaderConfiguration::CHANGE_MUST_REOPEN) {
552            mEventHub->requestReopenDevices();
553        } else {
554            for (size_t i = 0; i < mDevices.size(); i++) {
555                InputDevice* device = mDevices.valueAt(i);
556                device->configure(now, &mConfig, changes);
557            }
558        }
559    }
560}
561
562void InputReader::updateGlobalMetaStateLocked() {
563    mGlobalMetaState = 0;
564
565    for (size_t i = 0; i < mDevices.size(); i++) {
566        InputDevice* device = mDevices.valueAt(i);
567        mGlobalMetaState |= device->getMetaState();
568    }
569}
570
571int32_t InputReader::getGlobalMetaStateLocked() {
572    return mGlobalMetaState;
573}
574
575void InputReader::notifyExternalStylusPresenceChanged() {
576    refreshConfigurationLocked(InputReaderConfiguration::CHANGE_EXTERNAL_STYLUS_PRESENCE);
577}
578
579void InputReader::getExternalStylusDevicesLocked(Vector<InputDeviceInfo>& outDevices) {
580    for (size_t i = 0; i < mDevices.size(); i++) {
581        InputDevice* device = mDevices.valueAt(i);
582        if (device->getClasses() & INPUT_DEVICE_CLASS_EXTERNAL_STYLUS && !device->isIgnored()) {
583            outDevices.push();
584            device->getDeviceInfo(&outDevices.editTop());
585        }
586    }
587}
588
589void InputReader::dispatchExternalStylusState(const StylusState& state) {
590    for (size_t i = 0; i < mDevices.size(); i++) {
591        InputDevice* device = mDevices.valueAt(i);
592        device->updateExternalStylusState(state);
593    }
594}
595
596void InputReader::disableVirtualKeysUntilLocked(nsecs_t time) {
597    mDisableVirtualKeysTimeout = time;
598}
599
600bool InputReader::shouldDropVirtualKeyLocked(nsecs_t now,
601        InputDevice* device, int32_t keyCode, int32_t scanCode) {
602    if (now < mDisableVirtualKeysTimeout) {
603        ALOGI("Dropping virtual key from device %s because virtual keys are "
604                "temporarily disabled for the next %0.3fms.  keyCode=%d, scanCode=%d",
605                device->getName().string(),
606                (mDisableVirtualKeysTimeout - now) * 0.000001,
607                keyCode, scanCode);
608        return true;
609    } else {
610        return false;
611    }
612}
613
614void InputReader::fadePointerLocked() {
615    for (size_t i = 0; i < mDevices.size(); i++) {
616        InputDevice* device = mDevices.valueAt(i);
617        device->fadePointer();
618    }
619}
620
621void InputReader::requestTimeoutAtTimeLocked(nsecs_t when) {
622    if (when < mNextTimeout) {
623        mNextTimeout = when;
624        mEventHub->wake();
625    }
626}
627
628int32_t InputReader::bumpGenerationLocked() {
629    return ++mGeneration;
630}
631
632void InputReader::getInputDevices(Vector<InputDeviceInfo>& outInputDevices) {
633    AutoMutex _l(mLock);
634    getInputDevicesLocked(outInputDevices);
635}
636
637void InputReader::getInputDevicesLocked(Vector<InputDeviceInfo>& outInputDevices) {
638    outInputDevices.clear();
639
640    size_t numDevices = mDevices.size();
641    for (size_t i = 0; i < numDevices; i++) {
642        InputDevice* device = mDevices.valueAt(i);
643        if (!device->isIgnored()) {
644            outInputDevices.push();
645            device->getDeviceInfo(&outInputDevices.editTop());
646        }
647    }
648}
649
650int32_t InputReader::getKeyCodeState(int32_t deviceId, uint32_t sourceMask,
651        int32_t keyCode) {
652    AutoMutex _l(mLock);
653
654    return getStateLocked(deviceId, sourceMask, keyCode, &InputDevice::getKeyCodeState);
655}
656
657int32_t InputReader::getScanCodeState(int32_t deviceId, uint32_t sourceMask,
658        int32_t scanCode) {
659    AutoMutex _l(mLock);
660
661    return getStateLocked(deviceId, sourceMask, scanCode, &InputDevice::getScanCodeState);
662}
663
664int32_t InputReader::getSwitchState(int32_t deviceId, uint32_t sourceMask, int32_t switchCode) {
665    AutoMutex _l(mLock);
666
667    return getStateLocked(deviceId, sourceMask, switchCode, &InputDevice::getSwitchState);
668}
669
670int32_t InputReader::getStateLocked(int32_t deviceId, uint32_t sourceMask, int32_t code,
671        GetStateFunc getStateFunc) {
672    int32_t result = AKEY_STATE_UNKNOWN;
673    if (deviceId >= 0) {
674        ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
675        if (deviceIndex >= 0) {
676            InputDevice* device = mDevices.valueAt(deviceIndex);
677            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
678                result = (device->*getStateFunc)(sourceMask, code);
679            }
680        }
681    } else {
682        size_t numDevices = mDevices.size();
683        for (size_t i = 0; i < numDevices; i++) {
684            InputDevice* device = mDevices.valueAt(i);
685            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
686                // If any device reports AKEY_STATE_DOWN or AKEY_STATE_VIRTUAL, return that
687                // value.  Otherwise, return AKEY_STATE_UP as long as one device reports it.
688                int32_t currentResult = (device->*getStateFunc)(sourceMask, code);
689                if (currentResult >= AKEY_STATE_DOWN) {
690                    return currentResult;
691                } else if (currentResult == AKEY_STATE_UP) {
692                    result = currentResult;
693                }
694            }
695        }
696    }
697    return result;
698}
699
700bool InputReader::hasKeys(int32_t deviceId, uint32_t sourceMask,
701        size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) {
702    AutoMutex _l(mLock);
703
704    memset(outFlags, 0, numCodes);
705    return markSupportedKeyCodesLocked(deviceId, sourceMask, numCodes, keyCodes, outFlags);
706}
707
708bool InputReader::markSupportedKeyCodesLocked(int32_t deviceId, uint32_t sourceMask,
709        size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) {
710    bool result = false;
711    if (deviceId >= 0) {
712        ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
713        if (deviceIndex >= 0) {
714            InputDevice* device = mDevices.valueAt(deviceIndex);
715            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
716                result = device->markSupportedKeyCodes(sourceMask,
717                        numCodes, keyCodes, outFlags);
718            }
719        }
720    } else {
721        size_t numDevices = mDevices.size();
722        for (size_t i = 0; i < numDevices; i++) {
723            InputDevice* device = mDevices.valueAt(i);
724            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
725                result |= device->markSupportedKeyCodes(sourceMask,
726                        numCodes, keyCodes, outFlags);
727            }
728        }
729    }
730    return result;
731}
732
733void InputReader::requestRefreshConfiguration(uint32_t changes) {
734    AutoMutex _l(mLock);
735
736    if (changes) {
737        bool needWake = !mConfigurationChangesToRefresh;
738        mConfigurationChangesToRefresh |= changes;
739
740        if (needWake) {
741            mEventHub->wake();
742        }
743    }
744}
745
746void InputReader::vibrate(int32_t deviceId, const nsecs_t* pattern, size_t patternSize,
747        ssize_t repeat, int32_t token) {
748    AutoMutex _l(mLock);
749
750    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
751    if (deviceIndex >= 0) {
752        InputDevice* device = mDevices.valueAt(deviceIndex);
753        device->vibrate(pattern, patternSize, repeat, token);
754    }
755}
756
757void InputReader::cancelVibrate(int32_t deviceId, int32_t token) {
758    AutoMutex _l(mLock);
759
760    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
761    if (deviceIndex >= 0) {
762        InputDevice* device = mDevices.valueAt(deviceIndex);
763        device->cancelVibrate(token);
764    }
765}
766
767void InputReader::dump(String8& dump) {
768    AutoMutex _l(mLock);
769
770    mEventHub->dump(dump);
771    dump.append("\n");
772
773    dump.append("Input Reader State:\n");
774
775    for (size_t i = 0; i < mDevices.size(); i++) {
776        mDevices.valueAt(i)->dump(dump);
777    }
778
779    dump.append(INDENT "Configuration:\n");
780    dump.append(INDENT2 "ExcludedDeviceNames: [");
781    for (size_t i = 0; i < mConfig.excludedDeviceNames.size(); i++) {
782        if (i != 0) {
783            dump.append(", ");
784        }
785        dump.append(mConfig.excludedDeviceNames.itemAt(i).string());
786    }
787    dump.append("]\n");
788    dump.appendFormat(INDENT2 "VirtualKeyQuietTime: %0.1fms\n",
789            mConfig.virtualKeyQuietTime * 0.000001f);
790
791    dump.appendFormat(INDENT2 "PointerVelocityControlParameters: "
792            "scale=%0.3f, lowThreshold=%0.3f, highThreshold=%0.3f, acceleration=%0.3f\n",
793            mConfig.pointerVelocityControlParameters.scale,
794            mConfig.pointerVelocityControlParameters.lowThreshold,
795            mConfig.pointerVelocityControlParameters.highThreshold,
796            mConfig.pointerVelocityControlParameters.acceleration);
797
798    dump.appendFormat(INDENT2 "WheelVelocityControlParameters: "
799            "scale=%0.3f, lowThreshold=%0.3f, highThreshold=%0.3f, acceleration=%0.3f\n",
800            mConfig.wheelVelocityControlParameters.scale,
801            mConfig.wheelVelocityControlParameters.lowThreshold,
802            mConfig.wheelVelocityControlParameters.highThreshold,
803            mConfig.wheelVelocityControlParameters.acceleration);
804
805    dump.appendFormat(INDENT2 "PointerGesture:\n");
806    dump.appendFormat(INDENT3 "Enabled: %s\n",
807            toString(mConfig.pointerGesturesEnabled));
808    dump.appendFormat(INDENT3 "QuietInterval: %0.1fms\n",
809            mConfig.pointerGestureQuietInterval * 0.000001f);
810    dump.appendFormat(INDENT3 "DragMinSwitchSpeed: %0.1fpx/s\n",
811            mConfig.pointerGestureDragMinSwitchSpeed);
812    dump.appendFormat(INDENT3 "TapInterval: %0.1fms\n",
813            mConfig.pointerGestureTapInterval * 0.000001f);
814    dump.appendFormat(INDENT3 "TapDragInterval: %0.1fms\n",
815            mConfig.pointerGestureTapDragInterval * 0.000001f);
816    dump.appendFormat(INDENT3 "TapSlop: %0.1fpx\n",
817            mConfig.pointerGestureTapSlop);
818    dump.appendFormat(INDENT3 "MultitouchSettleInterval: %0.1fms\n",
819            mConfig.pointerGestureMultitouchSettleInterval * 0.000001f);
820    dump.appendFormat(INDENT3 "MultitouchMinDistance: %0.1fpx\n",
821            mConfig.pointerGestureMultitouchMinDistance);
822    dump.appendFormat(INDENT3 "SwipeTransitionAngleCosine: %0.1f\n",
823            mConfig.pointerGestureSwipeTransitionAngleCosine);
824    dump.appendFormat(INDENT3 "SwipeMaxWidthRatio: %0.1f\n",
825            mConfig.pointerGestureSwipeMaxWidthRatio);
826    dump.appendFormat(INDENT3 "MovementSpeedRatio: %0.1f\n",
827            mConfig.pointerGestureMovementSpeedRatio);
828    dump.appendFormat(INDENT3 "ZoomSpeedRatio: %0.1f\n",
829            mConfig.pointerGestureZoomSpeedRatio);
830}
831
832void InputReader::monitor() {
833    // Acquire and release the lock to ensure that the reader has not deadlocked.
834    mLock.lock();
835    mEventHub->wake();
836    mReaderIsAliveCondition.wait(mLock);
837    mLock.unlock();
838
839    // Check the EventHub
840    mEventHub->monitor();
841}
842
843
844// --- InputReader::ContextImpl ---
845
846InputReader::ContextImpl::ContextImpl(InputReader* reader) :
847        mReader(reader) {
848}
849
850void InputReader::ContextImpl::updateGlobalMetaState() {
851    // lock is already held by the input loop
852    mReader->updateGlobalMetaStateLocked();
853}
854
855int32_t InputReader::ContextImpl::getGlobalMetaState() {
856    // lock is already held by the input loop
857    return mReader->getGlobalMetaStateLocked();
858}
859
860void InputReader::ContextImpl::disableVirtualKeysUntil(nsecs_t time) {
861    // lock is already held by the input loop
862    mReader->disableVirtualKeysUntilLocked(time);
863}
864
865bool InputReader::ContextImpl::shouldDropVirtualKey(nsecs_t now,
866        InputDevice* device, int32_t keyCode, int32_t scanCode) {
867    // lock is already held by the input loop
868    return mReader->shouldDropVirtualKeyLocked(now, device, keyCode, scanCode);
869}
870
871void InputReader::ContextImpl::fadePointer() {
872    // lock is already held by the input loop
873    mReader->fadePointerLocked();
874}
875
876void InputReader::ContextImpl::requestTimeoutAtTime(nsecs_t when) {
877    // lock is already held by the input loop
878    mReader->requestTimeoutAtTimeLocked(when);
879}
880
881int32_t InputReader::ContextImpl::bumpGeneration() {
882    // lock is already held by the input loop
883    return mReader->bumpGenerationLocked();
884}
885
886void InputReader::ContextImpl::getExternalStylusDevices(Vector<InputDeviceInfo>& outDevices) {
887    // lock is already held by whatever called refreshConfigurationLocked
888    mReader->getExternalStylusDevicesLocked(outDevices);
889}
890
891void InputReader::ContextImpl::dispatchExternalStylusState(const StylusState& state) {
892    mReader->dispatchExternalStylusState(state);
893}
894
895InputReaderPolicyInterface* InputReader::ContextImpl::getPolicy() {
896    return mReader->mPolicy.get();
897}
898
899InputListenerInterface* InputReader::ContextImpl::getListener() {
900    return mReader->mQueuedListener.get();
901}
902
903EventHubInterface* InputReader::ContextImpl::getEventHub() {
904    return mReader->mEventHub.get();
905}
906
907
908// --- InputReaderThread ---
909
910InputReaderThread::InputReaderThread(const sp<InputReaderInterface>& reader) :
911        Thread(/*canCallJava*/ true), mReader(reader) {
912}
913
914InputReaderThread::~InputReaderThread() {
915}
916
917bool InputReaderThread::threadLoop() {
918    mReader->loopOnce();
919    return true;
920}
921
922
923// --- InputDevice ---
924
925InputDevice::InputDevice(InputReaderContext* context, int32_t id, int32_t generation,
926        int32_t controllerNumber, const InputDeviceIdentifier& identifier, uint32_t classes) :
927        mContext(context), mId(id), mGeneration(generation), mControllerNumber(controllerNumber),
928        mIdentifier(identifier), mClasses(classes),
929        mSources(0), mIsExternal(false), mHasMic(false), mDropUntilNextSync(false) {
930}
931
932InputDevice::~InputDevice() {
933    size_t numMappers = mMappers.size();
934    for (size_t i = 0; i < numMappers; i++) {
935        delete mMappers[i];
936    }
937    mMappers.clear();
938}
939
940void InputDevice::dump(String8& dump) {
941    InputDeviceInfo deviceInfo;
942    getDeviceInfo(& deviceInfo);
943
944    dump.appendFormat(INDENT "Device %d: %s\n", deviceInfo.getId(),
945            deviceInfo.getDisplayName().string());
946    dump.appendFormat(INDENT2 "Generation: %d\n", mGeneration);
947    dump.appendFormat(INDENT2 "IsExternal: %s\n", toString(mIsExternal));
948    dump.appendFormat(INDENT2 "HasMic:     %s\n", toString(mHasMic));
949    dump.appendFormat(INDENT2 "Sources: 0x%08x\n", deviceInfo.getSources());
950    dump.appendFormat(INDENT2 "KeyboardType: %d\n", deviceInfo.getKeyboardType());
951
952    const Vector<InputDeviceInfo::MotionRange>& ranges = deviceInfo.getMotionRanges();
953    if (!ranges.isEmpty()) {
954        dump.append(INDENT2 "Motion Ranges:\n");
955        for (size_t i = 0; i < ranges.size(); i++) {
956            const InputDeviceInfo::MotionRange& range = ranges.itemAt(i);
957            const char* label = getAxisLabel(range.axis);
958            char name[32];
959            if (label) {
960                strncpy(name, label, sizeof(name));
961                name[sizeof(name) - 1] = '\0';
962            } else {
963                snprintf(name, sizeof(name), "%d", range.axis);
964            }
965            dump.appendFormat(INDENT3 "%s: source=0x%08x, "
966                    "min=%0.3f, max=%0.3f, flat=%0.3f, fuzz=%0.3f, resolution=%0.3f\n",
967                    name, range.source, range.min, range.max, range.flat, range.fuzz,
968                    range.resolution);
969        }
970    }
971
972    size_t numMappers = mMappers.size();
973    for (size_t i = 0; i < numMappers; i++) {
974        InputMapper* mapper = mMappers[i];
975        mapper->dump(dump);
976    }
977}
978
979void InputDevice::addMapper(InputMapper* mapper) {
980    mMappers.add(mapper);
981}
982
983void InputDevice::configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes) {
984    mSources = 0;
985
986    if (!isIgnored()) {
987        if (!changes) { // first time only
988            mContext->getEventHub()->getConfiguration(mId, &mConfiguration);
989        }
990
991        if (!changes || (changes & InputReaderConfiguration::CHANGE_KEYBOARD_LAYOUTS)) {
992            if (!(mClasses & INPUT_DEVICE_CLASS_VIRTUAL)) {
993                sp<KeyCharacterMap> keyboardLayout =
994                        mContext->getPolicy()->getKeyboardLayoutOverlay(mIdentifier);
995                if (mContext->getEventHub()->setKeyboardLayoutOverlay(mId, keyboardLayout)) {
996                    bumpGeneration();
997                }
998            }
999        }
1000
1001        if (!changes || (changes & InputReaderConfiguration::CHANGE_DEVICE_ALIAS)) {
1002            if (!(mClasses & INPUT_DEVICE_CLASS_VIRTUAL)) {
1003                String8 alias = mContext->getPolicy()->getDeviceAlias(mIdentifier);
1004                if (mAlias != alias) {
1005                    mAlias = alias;
1006                    bumpGeneration();
1007                }
1008            }
1009        }
1010
1011        size_t numMappers = mMappers.size();
1012        for (size_t i = 0; i < numMappers; i++) {
1013            InputMapper* mapper = mMappers[i];
1014            mapper->configure(when, config, changes);
1015            mSources |= mapper->getSources();
1016        }
1017    }
1018}
1019
1020void InputDevice::reset(nsecs_t when) {
1021    size_t numMappers = mMappers.size();
1022    for (size_t i = 0; i < numMappers; i++) {
1023        InputMapper* mapper = mMappers[i];
1024        mapper->reset(when);
1025    }
1026
1027    mContext->updateGlobalMetaState();
1028
1029    notifyReset(when);
1030}
1031
1032void InputDevice::process(const RawEvent* rawEvents, size_t count) {
1033    // Process all of the events in order for each mapper.
1034    // We cannot simply ask each mapper to process them in bulk because mappers may
1035    // have side-effects that must be interleaved.  For example, joystick movement events and
1036    // gamepad button presses are handled by different mappers but they should be dispatched
1037    // in the order received.
1038    size_t numMappers = mMappers.size();
1039    for (const RawEvent* rawEvent = rawEvents; count--; rawEvent++) {
1040#if DEBUG_RAW_EVENTS
1041        ALOGD("Input event: device=%d type=0x%04x code=0x%04x value=0x%08x when=%lld",
1042                rawEvent->deviceId, rawEvent->type, rawEvent->code, rawEvent->value,
1043                rawEvent->when);
1044#endif
1045
1046        if (mDropUntilNextSync) {
1047            if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
1048                mDropUntilNextSync = false;
1049#if DEBUG_RAW_EVENTS
1050                ALOGD("Recovered from input event buffer overrun.");
1051#endif
1052            } else {
1053#if DEBUG_RAW_EVENTS
1054                ALOGD("Dropped input event while waiting for next input sync.");
1055#endif
1056            }
1057        } else if (rawEvent->type == EV_SYN && rawEvent->code == SYN_DROPPED) {
1058            ALOGI("Detected input event buffer overrun for device %s.", getName().string());
1059            mDropUntilNextSync = true;
1060            reset(rawEvent->when);
1061        } else {
1062            for (size_t i = 0; i < numMappers; i++) {
1063                InputMapper* mapper = mMappers[i];
1064                mapper->process(rawEvent);
1065            }
1066        }
1067    }
1068}
1069
1070void InputDevice::timeoutExpired(nsecs_t when) {
1071    size_t numMappers = mMappers.size();
1072    for (size_t i = 0; i < numMappers; i++) {
1073        InputMapper* mapper = mMappers[i];
1074        mapper->timeoutExpired(when);
1075    }
1076}
1077
1078void InputDevice::updateExternalStylusState(const StylusState& state) {
1079    size_t numMappers = mMappers.size();
1080    for (size_t i = 0; i < numMappers; i++) {
1081        InputMapper* mapper = mMappers[i];
1082        mapper->updateExternalStylusState(state);
1083    }
1084}
1085
1086void InputDevice::getDeviceInfo(InputDeviceInfo* outDeviceInfo) {
1087    outDeviceInfo->initialize(mId, mGeneration, mControllerNumber, mIdentifier, mAlias,
1088            mIsExternal, mHasMic);
1089    size_t numMappers = mMappers.size();
1090    for (size_t i = 0; i < numMappers; i++) {
1091        InputMapper* mapper = mMappers[i];
1092        mapper->populateDeviceInfo(outDeviceInfo);
1093    }
1094}
1095
1096int32_t InputDevice::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
1097    return getState(sourceMask, keyCode, & InputMapper::getKeyCodeState);
1098}
1099
1100int32_t InputDevice::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
1101    return getState(sourceMask, scanCode, & InputMapper::getScanCodeState);
1102}
1103
1104int32_t InputDevice::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
1105    return getState(sourceMask, switchCode, & InputMapper::getSwitchState);
1106}
1107
1108int32_t InputDevice::getState(uint32_t sourceMask, int32_t code, GetStateFunc getStateFunc) {
1109    int32_t result = AKEY_STATE_UNKNOWN;
1110    size_t numMappers = mMappers.size();
1111    for (size_t i = 0; i < numMappers; i++) {
1112        InputMapper* mapper = mMappers[i];
1113        if (sourcesMatchMask(mapper->getSources(), sourceMask)) {
1114            // If any mapper reports AKEY_STATE_DOWN or AKEY_STATE_VIRTUAL, return that
1115            // value.  Otherwise, return AKEY_STATE_UP as long as one mapper reports it.
1116            int32_t currentResult = (mapper->*getStateFunc)(sourceMask, code);
1117            if (currentResult >= AKEY_STATE_DOWN) {
1118                return currentResult;
1119            } else if (currentResult == AKEY_STATE_UP) {
1120                result = currentResult;
1121            }
1122        }
1123    }
1124    return result;
1125}
1126
1127bool InputDevice::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
1128        const int32_t* keyCodes, uint8_t* outFlags) {
1129    bool result = false;
1130    size_t numMappers = mMappers.size();
1131    for (size_t i = 0; i < numMappers; i++) {
1132        InputMapper* mapper = mMappers[i];
1133        if (sourcesMatchMask(mapper->getSources(), sourceMask)) {
1134            result |= mapper->markSupportedKeyCodes(sourceMask, numCodes, keyCodes, outFlags);
1135        }
1136    }
1137    return result;
1138}
1139
1140void InputDevice::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
1141        int32_t token) {
1142    size_t numMappers = mMappers.size();
1143    for (size_t i = 0; i < numMappers; i++) {
1144        InputMapper* mapper = mMappers[i];
1145        mapper->vibrate(pattern, patternSize, repeat, token);
1146    }
1147}
1148
1149void InputDevice::cancelVibrate(int32_t token) {
1150    size_t numMappers = mMappers.size();
1151    for (size_t i = 0; i < numMappers; i++) {
1152        InputMapper* mapper = mMappers[i];
1153        mapper->cancelVibrate(token);
1154    }
1155}
1156
1157void InputDevice::cancelTouch(nsecs_t when) {
1158    size_t numMappers = mMappers.size();
1159    for (size_t i = 0; i < numMappers; i++) {
1160        InputMapper* mapper = mMappers[i];
1161        mapper->cancelTouch(when);
1162    }
1163}
1164
1165int32_t InputDevice::getMetaState() {
1166    int32_t result = 0;
1167    size_t numMappers = mMappers.size();
1168    for (size_t i = 0; i < numMappers; i++) {
1169        InputMapper* mapper = mMappers[i];
1170        result |= mapper->getMetaState();
1171    }
1172    return result;
1173}
1174
1175void InputDevice::fadePointer() {
1176    size_t numMappers = mMappers.size();
1177    for (size_t i = 0; i < numMappers; i++) {
1178        InputMapper* mapper = mMappers[i];
1179        mapper->fadePointer();
1180    }
1181}
1182
1183void InputDevice::bumpGeneration() {
1184    mGeneration = mContext->bumpGeneration();
1185}
1186
1187void InputDevice::notifyReset(nsecs_t when) {
1188    NotifyDeviceResetArgs args(when, mId);
1189    mContext->getListener()->notifyDeviceReset(&args);
1190}
1191
1192
1193// --- CursorButtonAccumulator ---
1194
1195CursorButtonAccumulator::CursorButtonAccumulator() {
1196    clearButtons();
1197}
1198
1199void CursorButtonAccumulator::reset(InputDevice* device) {
1200    mBtnLeft = device->isKeyPressed(BTN_LEFT);
1201    mBtnRight = device->isKeyPressed(BTN_RIGHT);
1202    mBtnMiddle = device->isKeyPressed(BTN_MIDDLE);
1203    mBtnBack = device->isKeyPressed(BTN_BACK);
1204    mBtnSide = device->isKeyPressed(BTN_SIDE);
1205    mBtnForward = device->isKeyPressed(BTN_FORWARD);
1206    mBtnExtra = device->isKeyPressed(BTN_EXTRA);
1207    mBtnTask = device->isKeyPressed(BTN_TASK);
1208}
1209
1210void CursorButtonAccumulator::clearButtons() {
1211    mBtnLeft = 0;
1212    mBtnRight = 0;
1213    mBtnMiddle = 0;
1214    mBtnBack = 0;
1215    mBtnSide = 0;
1216    mBtnForward = 0;
1217    mBtnExtra = 0;
1218    mBtnTask = 0;
1219}
1220
1221void CursorButtonAccumulator::process(const RawEvent* rawEvent) {
1222    if (rawEvent->type == EV_KEY) {
1223        switch (rawEvent->code) {
1224        case BTN_LEFT:
1225            mBtnLeft = rawEvent->value;
1226            break;
1227        case BTN_RIGHT:
1228            mBtnRight = rawEvent->value;
1229            break;
1230        case BTN_MIDDLE:
1231            mBtnMiddle = rawEvent->value;
1232            break;
1233        case BTN_BACK:
1234            mBtnBack = rawEvent->value;
1235            break;
1236        case BTN_SIDE:
1237            mBtnSide = rawEvent->value;
1238            break;
1239        case BTN_FORWARD:
1240            mBtnForward = rawEvent->value;
1241            break;
1242        case BTN_EXTRA:
1243            mBtnExtra = rawEvent->value;
1244            break;
1245        case BTN_TASK:
1246            mBtnTask = rawEvent->value;
1247            break;
1248        }
1249    }
1250}
1251
1252uint32_t CursorButtonAccumulator::getButtonState() const {
1253    uint32_t result = 0;
1254    if (mBtnLeft) {
1255        result |= AMOTION_EVENT_BUTTON_PRIMARY;
1256    }
1257    if (mBtnRight) {
1258        result |= AMOTION_EVENT_BUTTON_SECONDARY;
1259    }
1260    if (mBtnMiddle) {
1261        result |= AMOTION_EVENT_BUTTON_TERTIARY;
1262    }
1263    if (mBtnBack || mBtnSide) {
1264        result |= AMOTION_EVENT_BUTTON_BACK;
1265    }
1266    if (mBtnForward || mBtnExtra) {
1267        result |= AMOTION_EVENT_BUTTON_FORWARD;
1268    }
1269    return result;
1270}
1271
1272
1273// --- CursorMotionAccumulator ---
1274
1275CursorMotionAccumulator::CursorMotionAccumulator() {
1276    clearRelativeAxes();
1277}
1278
1279void CursorMotionAccumulator::reset(InputDevice* device) {
1280    clearRelativeAxes();
1281}
1282
1283void CursorMotionAccumulator::clearRelativeAxes() {
1284    mRelX = 0;
1285    mRelY = 0;
1286}
1287
1288void CursorMotionAccumulator::process(const RawEvent* rawEvent) {
1289    if (rawEvent->type == EV_REL) {
1290        switch (rawEvent->code) {
1291        case REL_X:
1292            mRelX = rawEvent->value;
1293            break;
1294        case REL_Y:
1295            mRelY = rawEvent->value;
1296            break;
1297        }
1298    }
1299}
1300
1301void CursorMotionAccumulator::finishSync() {
1302    clearRelativeAxes();
1303}
1304
1305
1306// --- CursorScrollAccumulator ---
1307
1308CursorScrollAccumulator::CursorScrollAccumulator() :
1309        mHaveRelWheel(false), mHaveRelHWheel(false) {
1310    clearRelativeAxes();
1311}
1312
1313void CursorScrollAccumulator::configure(InputDevice* device) {
1314    mHaveRelWheel = device->getEventHub()->hasRelativeAxis(device->getId(), REL_WHEEL);
1315    mHaveRelHWheel = device->getEventHub()->hasRelativeAxis(device->getId(), REL_HWHEEL);
1316}
1317
1318void CursorScrollAccumulator::reset(InputDevice* device) {
1319    clearRelativeAxes();
1320}
1321
1322void CursorScrollAccumulator::clearRelativeAxes() {
1323    mRelWheel = 0;
1324    mRelHWheel = 0;
1325}
1326
1327void CursorScrollAccumulator::process(const RawEvent* rawEvent) {
1328    if (rawEvent->type == EV_REL) {
1329        switch (rawEvent->code) {
1330        case REL_WHEEL:
1331            mRelWheel = rawEvent->value;
1332            break;
1333        case REL_HWHEEL:
1334            mRelHWheel = rawEvent->value;
1335            break;
1336        }
1337    }
1338}
1339
1340void CursorScrollAccumulator::finishSync() {
1341    clearRelativeAxes();
1342}
1343
1344
1345// --- TouchButtonAccumulator ---
1346
1347TouchButtonAccumulator::TouchButtonAccumulator() :
1348        mHaveBtnTouch(false), mHaveStylus(false) {
1349    clearButtons();
1350}
1351
1352void TouchButtonAccumulator::configure(InputDevice* device) {
1353    mHaveBtnTouch = device->hasKey(BTN_TOUCH);
1354    mHaveStylus = device->hasKey(BTN_TOOL_PEN)
1355            || device->hasKey(BTN_TOOL_RUBBER)
1356            || device->hasKey(BTN_TOOL_BRUSH)
1357            || device->hasKey(BTN_TOOL_PENCIL)
1358            || device->hasKey(BTN_TOOL_AIRBRUSH);
1359}
1360
1361void TouchButtonAccumulator::reset(InputDevice* device) {
1362    mBtnTouch = device->isKeyPressed(BTN_TOUCH);
1363    mBtnStylus = device->isKeyPressed(BTN_STYLUS);
1364    // BTN_0 is what gets mapped for the HID usage Digitizers.SecondaryBarrelSwitch
1365    mBtnStylus2 =
1366            device->isKeyPressed(BTN_STYLUS2) || device->isKeyPressed(BTN_0);
1367    mBtnToolFinger = device->isKeyPressed(BTN_TOOL_FINGER);
1368    mBtnToolPen = device->isKeyPressed(BTN_TOOL_PEN);
1369    mBtnToolRubber = device->isKeyPressed(BTN_TOOL_RUBBER);
1370    mBtnToolBrush = device->isKeyPressed(BTN_TOOL_BRUSH);
1371    mBtnToolPencil = device->isKeyPressed(BTN_TOOL_PENCIL);
1372    mBtnToolAirbrush = device->isKeyPressed(BTN_TOOL_AIRBRUSH);
1373    mBtnToolMouse = device->isKeyPressed(BTN_TOOL_MOUSE);
1374    mBtnToolLens = device->isKeyPressed(BTN_TOOL_LENS);
1375    mBtnToolDoubleTap = device->isKeyPressed(BTN_TOOL_DOUBLETAP);
1376    mBtnToolTripleTap = device->isKeyPressed(BTN_TOOL_TRIPLETAP);
1377    mBtnToolQuadTap = device->isKeyPressed(BTN_TOOL_QUADTAP);
1378}
1379
1380void TouchButtonAccumulator::clearButtons() {
1381    mBtnTouch = 0;
1382    mBtnStylus = 0;
1383    mBtnStylus2 = 0;
1384    mBtnToolFinger = 0;
1385    mBtnToolPen = 0;
1386    mBtnToolRubber = 0;
1387    mBtnToolBrush = 0;
1388    mBtnToolPencil = 0;
1389    mBtnToolAirbrush = 0;
1390    mBtnToolMouse = 0;
1391    mBtnToolLens = 0;
1392    mBtnToolDoubleTap = 0;
1393    mBtnToolTripleTap = 0;
1394    mBtnToolQuadTap = 0;
1395}
1396
1397void TouchButtonAccumulator::process(const RawEvent* rawEvent) {
1398    if (rawEvent->type == EV_KEY) {
1399        switch (rawEvent->code) {
1400        case BTN_TOUCH:
1401            mBtnTouch = rawEvent->value;
1402            break;
1403        case BTN_STYLUS:
1404            mBtnStylus = rawEvent->value;
1405            break;
1406        case BTN_STYLUS2:
1407        case BTN_0:// BTN_0 is what gets mapped for the HID usage Digitizers.SecondaryBarrelSwitch
1408            mBtnStylus2 = rawEvent->value;
1409            break;
1410        case BTN_TOOL_FINGER:
1411            mBtnToolFinger = rawEvent->value;
1412            break;
1413        case BTN_TOOL_PEN:
1414            mBtnToolPen = rawEvent->value;
1415            break;
1416        case BTN_TOOL_RUBBER:
1417            mBtnToolRubber = rawEvent->value;
1418            break;
1419        case BTN_TOOL_BRUSH:
1420            mBtnToolBrush = rawEvent->value;
1421            break;
1422        case BTN_TOOL_PENCIL:
1423            mBtnToolPencil = rawEvent->value;
1424            break;
1425        case BTN_TOOL_AIRBRUSH:
1426            mBtnToolAirbrush = rawEvent->value;
1427            break;
1428        case BTN_TOOL_MOUSE:
1429            mBtnToolMouse = rawEvent->value;
1430            break;
1431        case BTN_TOOL_LENS:
1432            mBtnToolLens = rawEvent->value;
1433            break;
1434        case BTN_TOOL_DOUBLETAP:
1435            mBtnToolDoubleTap = rawEvent->value;
1436            break;
1437        case BTN_TOOL_TRIPLETAP:
1438            mBtnToolTripleTap = rawEvent->value;
1439            break;
1440        case BTN_TOOL_QUADTAP:
1441            mBtnToolQuadTap = rawEvent->value;
1442            break;
1443        }
1444    }
1445}
1446
1447uint32_t TouchButtonAccumulator::getButtonState() const {
1448    uint32_t result = 0;
1449    if (mBtnStylus) {
1450        result |= AMOTION_EVENT_BUTTON_STYLUS_PRIMARY;
1451    }
1452    if (mBtnStylus2) {
1453        result |= AMOTION_EVENT_BUTTON_STYLUS_SECONDARY;
1454    }
1455    return result;
1456}
1457
1458int32_t TouchButtonAccumulator::getToolType() const {
1459    if (mBtnToolMouse || mBtnToolLens) {
1460        return AMOTION_EVENT_TOOL_TYPE_MOUSE;
1461    }
1462    if (mBtnToolRubber) {
1463        return AMOTION_EVENT_TOOL_TYPE_ERASER;
1464    }
1465    if (mBtnToolPen || mBtnToolBrush || mBtnToolPencil || mBtnToolAirbrush) {
1466        return AMOTION_EVENT_TOOL_TYPE_STYLUS;
1467    }
1468    if (mBtnToolFinger || mBtnToolDoubleTap || mBtnToolTripleTap || mBtnToolQuadTap) {
1469        return AMOTION_EVENT_TOOL_TYPE_FINGER;
1470    }
1471    return AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
1472}
1473
1474bool TouchButtonAccumulator::isToolActive() const {
1475    return mBtnTouch || mBtnToolFinger || mBtnToolPen || mBtnToolRubber
1476            || mBtnToolBrush || mBtnToolPencil || mBtnToolAirbrush
1477            || mBtnToolMouse || mBtnToolLens
1478            || mBtnToolDoubleTap || mBtnToolTripleTap || mBtnToolQuadTap;
1479}
1480
1481bool TouchButtonAccumulator::isHovering() const {
1482    return mHaveBtnTouch && !mBtnTouch;
1483}
1484
1485bool TouchButtonAccumulator::hasStylus() const {
1486    return mHaveStylus;
1487}
1488
1489
1490// --- RawPointerAxes ---
1491
1492RawPointerAxes::RawPointerAxes() {
1493    clear();
1494}
1495
1496void RawPointerAxes::clear() {
1497    x.clear();
1498    y.clear();
1499    pressure.clear();
1500    touchMajor.clear();
1501    touchMinor.clear();
1502    toolMajor.clear();
1503    toolMinor.clear();
1504    orientation.clear();
1505    distance.clear();
1506    tiltX.clear();
1507    tiltY.clear();
1508    trackingId.clear();
1509    slot.clear();
1510}
1511
1512
1513// --- RawPointerData ---
1514
1515RawPointerData::RawPointerData() {
1516    clear();
1517}
1518
1519void RawPointerData::clear() {
1520    pointerCount = 0;
1521    clearIdBits();
1522}
1523
1524void RawPointerData::copyFrom(const RawPointerData& other) {
1525    pointerCount = other.pointerCount;
1526    hoveringIdBits = other.hoveringIdBits;
1527    touchingIdBits = other.touchingIdBits;
1528
1529    for (uint32_t i = 0; i < pointerCount; i++) {
1530        pointers[i] = other.pointers[i];
1531
1532        int id = pointers[i].id;
1533        idToIndex[id] = other.idToIndex[id];
1534    }
1535}
1536
1537void RawPointerData::getCentroidOfTouchingPointers(float* outX, float* outY) const {
1538    float x = 0, y = 0;
1539    uint32_t count = touchingIdBits.count();
1540    if (count) {
1541        for (BitSet32 idBits(touchingIdBits); !idBits.isEmpty(); ) {
1542            uint32_t id = idBits.clearFirstMarkedBit();
1543            const Pointer& pointer = pointerForId(id);
1544            x += pointer.x;
1545            y += pointer.y;
1546        }
1547        x /= count;
1548        y /= count;
1549    }
1550    *outX = x;
1551    *outY = y;
1552}
1553
1554
1555// --- CookedPointerData ---
1556
1557CookedPointerData::CookedPointerData() {
1558    clear();
1559}
1560
1561void CookedPointerData::clear() {
1562    pointerCount = 0;
1563    hoveringIdBits.clear();
1564    touchingIdBits.clear();
1565}
1566
1567void CookedPointerData::copyFrom(const CookedPointerData& other) {
1568    pointerCount = other.pointerCount;
1569    hoveringIdBits = other.hoveringIdBits;
1570    touchingIdBits = other.touchingIdBits;
1571
1572    for (uint32_t i = 0; i < pointerCount; i++) {
1573        pointerProperties[i].copyFrom(other.pointerProperties[i]);
1574        pointerCoords[i].copyFrom(other.pointerCoords[i]);
1575
1576        int id = pointerProperties[i].id;
1577        idToIndex[id] = other.idToIndex[id];
1578    }
1579}
1580
1581
1582// --- SingleTouchMotionAccumulator ---
1583
1584SingleTouchMotionAccumulator::SingleTouchMotionAccumulator() {
1585    clearAbsoluteAxes();
1586}
1587
1588void SingleTouchMotionAccumulator::reset(InputDevice* device) {
1589    mAbsX = device->getAbsoluteAxisValue(ABS_X);
1590    mAbsY = device->getAbsoluteAxisValue(ABS_Y);
1591    mAbsPressure = device->getAbsoluteAxisValue(ABS_PRESSURE);
1592    mAbsToolWidth = device->getAbsoluteAxisValue(ABS_TOOL_WIDTH);
1593    mAbsDistance = device->getAbsoluteAxisValue(ABS_DISTANCE);
1594    mAbsTiltX = device->getAbsoluteAxisValue(ABS_TILT_X);
1595    mAbsTiltY = device->getAbsoluteAxisValue(ABS_TILT_Y);
1596}
1597
1598void SingleTouchMotionAccumulator::clearAbsoluteAxes() {
1599    mAbsX = 0;
1600    mAbsY = 0;
1601    mAbsPressure = 0;
1602    mAbsToolWidth = 0;
1603    mAbsDistance = 0;
1604    mAbsTiltX = 0;
1605    mAbsTiltY = 0;
1606}
1607
1608void SingleTouchMotionAccumulator::process(const RawEvent* rawEvent) {
1609    if (rawEvent->type == EV_ABS) {
1610        switch (rawEvent->code) {
1611        case ABS_X:
1612            mAbsX = rawEvent->value;
1613            break;
1614        case ABS_Y:
1615            mAbsY = rawEvent->value;
1616            break;
1617        case ABS_PRESSURE:
1618            mAbsPressure = rawEvent->value;
1619            break;
1620        case ABS_TOOL_WIDTH:
1621            mAbsToolWidth = rawEvent->value;
1622            break;
1623        case ABS_DISTANCE:
1624            mAbsDistance = rawEvent->value;
1625            break;
1626        case ABS_TILT_X:
1627            mAbsTiltX = rawEvent->value;
1628            break;
1629        case ABS_TILT_Y:
1630            mAbsTiltY = rawEvent->value;
1631            break;
1632        }
1633    }
1634}
1635
1636
1637// --- MultiTouchMotionAccumulator ---
1638
1639MultiTouchMotionAccumulator::MultiTouchMotionAccumulator() :
1640        mCurrentSlot(-1), mSlots(NULL), mSlotCount(0), mUsingSlotsProtocol(false),
1641        mHaveStylus(false) {
1642}
1643
1644MultiTouchMotionAccumulator::~MultiTouchMotionAccumulator() {
1645    delete[] mSlots;
1646}
1647
1648void MultiTouchMotionAccumulator::configure(InputDevice* device,
1649        size_t slotCount, bool usingSlotsProtocol) {
1650    mSlotCount = slotCount;
1651    mUsingSlotsProtocol = usingSlotsProtocol;
1652    mHaveStylus = device->hasAbsoluteAxis(ABS_MT_TOOL_TYPE);
1653
1654    delete[] mSlots;
1655    mSlots = new Slot[slotCount];
1656}
1657
1658void MultiTouchMotionAccumulator::reset(InputDevice* device) {
1659    // Unfortunately there is no way to read the initial contents of the slots.
1660    // So when we reset the accumulator, we must assume they are all zeroes.
1661    if (mUsingSlotsProtocol) {
1662        // Query the driver for the current slot index and use it as the initial slot
1663        // before we start reading events from the device.  It is possible that the
1664        // current slot index will not be the same as it was when the first event was
1665        // written into the evdev buffer, which means the input mapper could start
1666        // out of sync with the initial state of the events in the evdev buffer.
1667        // In the extremely unlikely case that this happens, the data from
1668        // two slots will be confused until the next ABS_MT_SLOT event is received.
1669        // This can cause the touch point to "jump", but at least there will be
1670        // no stuck touches.
1671        int32_t initialSlot;
1672        status_t status = device->getEventHub()->getAbsoluteAxisValue(device->getId(),
1673                ABS_MT_SLOT, &initialSlot);
1674        if (status) {
1675            ALOGD("Could not retrieve current multitouch slot index.  status=%d", status);
1676            initialSlot = -1;
1677        }
1678        clearSlots(initialSlot);
1679    } else {
1680        clearSlots(-1);
1681    }
1682}
1683
1684void MultiTouchMotionAccumulator::clearSlots(int32_t initialSlot) {
1685    if (mSlots) {
1686        for (size_t i = 0; i < mSlotCount; i++) {
1687            mSlots[i].clear();
1688        }
1689    }
1690    mCurrentSlot = initialSlot;
1691}
1692
1693void MultiTouchMotionAccumulator::process(const RawEvent* rawEvent) {
1694    if (rawEvent->type == EV_ABS) {
1695        bool newSlot = false;
1696        if (mUsingSlotsProtocol) {
1697            if (rawEvent->code == ABS_MT_SLOT) {
1698                mCurrentSlot = rawEvent->value;
1699                newSlot = true;
1700            }
1701        } else if (mCurrentSlot < 0) {
1702            mCurrentSlot = 0;
1703        }
1704
1705        if (mCurrentSlot < 0 || size_t(mCurrentSlot) >= mSlotCount) {
1706#if DEBUG_POINTERS
1707            if (newSlot) {
1708                ALOGW("MultiTouch device emitted invalid slot index %d but it "
1709                        "should be between 0 and %d; ignoring this slot.",
1710                        mCurrentSlot, mSlotCount - 1);
1711            }
1712#endif
1713        } else {
1714            Slot* slot = &mSlots[mCurrentSlot];
1715
1716            switch (rawEvent->code) {
1717            case ABS_MT_POSITION_X:
1718                slot->mInUse = true;
1719                slot->mAbsMTPositionX = rawEvent->value;
1720                break;
1721            case ABS_MT_POSITION_Y:
1722                slot->mInUse = true;
1723                slot->mAbsMTPositionY = rawEvent->value;
1724                break;
1725            case ABS_MT_TOUCH_MAJOR:
1726                slot->mInUse = true;
1727                slot->mAbsMTTouchMajor = rawEvent->value;
1728                break;
1729            case ABS_MT_TOUCH_MINOR:
1730                slot->mInUse = true;
1731                slot->mAbsMTTouchMinor = rawEvent->value;
1732                slot->mHaveAbsMTTouchMinor = true;
1733                break;
1734            case ABS_MT_WIDTH_MAJOR:
1735                slot->mInUse = true;
1736                slot->mAbsMTWidthMajor = rawEvent->value;
1737                break;
1738            case ABS_MT_WIDTH_MINOR:
1739                slot->mInUse = true;
1740                slot->mAbsMTWidthMinor = rawEvent->value;
1741                slot->mHaveAbsMTWidthMinor = true;
1742                break;
1743            case ABS_MT_ORIENTATION:
1744                slot->mInUse = true;
1745                slot->mAbsMTOrientation = rawEvent->value;
1746                break;
1747            case ABS_MT_TRACKING_ID:
1748                if (mUsingSlotsProtocol && rawEvent->value < 0) {
1749                    // The slot is no longer in use but it retains its previous contents,
1750                    // which may be reused for subsequent touches.
1751                    slot->mInUse = false;
1752                } else {
1753                    slot->mInUse = true;
1754                    slot->mAbsMTTrackingId = rawEvent->value;
1755                }
1756                break;
1757            case ABS_MT_PRESSURE:
1758                slot->mInUse = true;
1759                slot->mAbsMTPressure = rawEvent->value;
1760                break;
1761            case ABS_MT_DISTANCE:
1762                slot->mInUse = true;
1763                slot->mAbsMTDistance = rawEvent->value;
1764                break;
1765            case ABS_MT_TOOL_TYPE:
1766                slot->mInUse = true;
1767                slot->mAbsMTToolType = rawEvent->value;
1768                slot->mHaveAbsMTToolType = true;
1769                break;
1770            }
1771        }
1772    } else if (rawEvent->type == EV_SYN && rawEvent->code == SYN_MT_REPORT) {
1773        // MultiTouch Sync: The driver has returned all data for *one* of the pointers.
1774        mCurrentSlot += 1;
1775    }
1776}
1777
1778void MultiTouchMotionAccumulator::finishSync() {
1779    if (!mUsingSlotsProtocol) {
1780        clearSlots(-1);
1781    }
1782}
1783
1784bool MultiTouchMotionAccumulator::hasStylus() const {
1785    return mHaveStylus;
1786}
1787
1788
1789// --- MultiTouchMotionAccumulator::Slot ---
1790
1791MultiTouchMotionAccumulator::Slot::Slot() {
1792    clear();
1793}
1794
1795void MultiTouchMotionAccumulator::Slot::clear() {
1796    mInUse = false;
1797    mHaveAbsMTTouchMinor = false;
1798    mHaveAbsMTWidthMinor = false;
1799    mHaveAbsMTToolType = false;
1800    mAbsMTPositionX = 0;
1801    mAbsMTPositionY = 0;
1802    mAbsMTTouchMajor = 0;
1803    mAbsMTTouchMinor = 0;
1804    mAbsMTWidthMajor = 0;
1805    mAbsMTWidthMinor = 0;
1806    mAbsMTOrientation = 0;
1807    mAbsMTTrackingId = -1;
1808    mAbsMTPressure = 0;
1809    mAbsMTDistance = 0;
1810    mAbsMTToolType = 0;
1811}
1812
1813int32_t MultiTouchMotionAccumulator::Slot::getToolType() const {
1814    if (mHaveAbsMTToolType) {
1815        switch (mAbsMTToolType) {
1816        case MT_TOOL_FINGER:
1817            return AMOTION_EVENT_TOOL_TYPE_FINGER;
1818        case MT_TOOL_PEN:
1819            return AMOTION_EVENT_TOOL_TYPE_STYLUS;
1820        }
1821    }
1822    return AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
1823}
1824
1825
1826// --- InputMapper ---
1827
1828InputMapper::InputMapper(InputDevice* device) :
1829        mDevice(device), mContext(device->getContext()) {
1830}
1831
1832InputMapper::~InputMapper() {
1833}
1834
1835void InputMapper::populateDeviceInfo(InputDeviceInfo* info) {
1836    info->addSource(getSources());
1837}
1838
1839void InputMapper::dump(String8& dump) {
1840}
1841
1842void InputMapper::configure(nsecs_t when,
1843        const InputReaderConfiguration* config, uint32_t changes) {
1844}
1845
1846void InputMapper::reset(nsecs_t when) {
1847}
1848
1849void InputMapper::timeoutExpired(nsecs_t when) {
1850}
1851
1852int32_t InputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
1853    return AKEY_STATE_UNKNOWN;
1854}
1855
1856int32_t InputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
1857    return AKEY_STATE_UNKNOWN;
1858}
1859
1860int32_t InputMapper::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
1861    return AKEY_STATE_UNKNOWN;
1862}
1863
1864bool InputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
1865        const int32_t* keyCodes, uint8_t* outFlags) {
1866    return false;
1867}
1868
1869void InputMapper::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
1870        int32_t token) {
1871}
1872
1873void InputMapper::cancelVibrate(int32_t token) {
1874}
1875
1876void InputMapper::cancelTouch(nsecs_t when) {
1877}
1878
1879int32_t InputMapper::getMetaState() {
1880    return 0;
1881}
1882
1883void InputMapper::updateExternalStylusState(const StylusState& state) {
1884
1885}
1886
1887void InputMapper::fadePointer() {
1888}
1889
1890status_t InputMapper::getAbsoluteAxisInfo(int32_t axis, RawAbsoluteAxisInfo* axisInfo) {
1891    return getEventHub()->getAbsoluteAxisInfo(getDeviceId(), axis, axisInfo);
1892}
1893
1894void InputMapper::bumpGeneration() {
1895    mDevice->bumpGeneration();
1896}
1897
1898void InputMapper::dumpRawAbsoluteAxisInfo(String8& dump,
1899        const RawAbsoluteAxisInfo& axis, const char* name) {
1900    if (axis.valid) {
1901        dump.appendFormat(INDENT4 "%s: min=%d, max=%d, flat=%d, fuzz=%d, resolution=%d\n",
1902                name, axis.minValue, axis.maxValue, axis.flat, axis.fuzz, axis.resolution);
1903    } else {
1904        dump.appendFormat(INDENT4 "%s: unknown range\n", name);
1905    }
1906}
1907
1908void InputMapper::dumpStylusState(String8& dump, const StylusState& state) {
1909    dump.appendFormat(INDENT4 "When: %" PRId64 "\n", state.when);
1910    dump.appendFormat(INDENT4 "Pressure: %f\n", state.pressure);
1911    dump.appendFormat(INDENT4 "Button State: 0x%08x\n", state.buttons);
1912    dump.appendFormat(INDENT4 "Tool Type: %" PRId32 "\n", state.toolType);
1913}
1914
1915// --- SwitchInputMapper ---
1916
1917SwitchInputMapper::SwitchInputMapper(InputDevice* device) :
1918        InputMapper(device), mSwitchValues(0), mUpdatedSwitchMask(0) {
1919}
1920
1921SwitchInputMapper::~SwitchInputMapper() {
1922}
1923
1924uint32_t SwitchInputMapper::getSources() {
1925    return AINPUT_SOURCE_SWITCH;
1926}
1927
1928void SwitchInputMapper::process(const RawEvent* rawEvent) {
1929    switch (rawEvent->type) {
1930    case EV_SW:
1931        processSwitch(rawEvent->code, rawEvent->value);
1932        break;
1933
1934    case EV_SYN:
1935        if (rawEvent->code == SYN_REPORT) {
1936            sync(rawEvent->when);
1937        }
1938    }
1939}
1940
1941void SwitchInputMapper::processSwitch(int32_t switchCode, int32_t switchValue) {
1942    if (switchCode >= 0 && switchCode < 32) {
1943        if (switchValue) {
1944            mSwitchValues |= 1 << switchCode;
1945        } else {
1946            mSwitchValues &= ~(1 << switchCode);
1947        }
1948        mUpdatedSwitchMask |= 1 << switchCode;
1949    }
1950}
1951
1952void SwitchInputMapper::sync(nsecs_t when) {
1953    if (mUpdatedSwitchMask) {
1954        uint32_t updatedSwitchValues = mSwitchValues & mUpdatedSwitchMask;
1955        NotifySwitchArgs args(when, 0, updatedSwitchValues, mUpdatedSwitchMask);
1956        getListener()->notifySwitch(&args);
1957
1958        mUpdatedSwitchMask = 0;
1959    }
1960}
1961
1962int32_t SwitchInputMapper::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
1963    return getEventHub()->getSwitchState(getDeviceId(), switchCode);
1964}
1965
1966void SwitchInputMapper::dump(String8& dump) {
1967    dump.append(INDENT2 "Switch Input Mapper:\n");
1968    dump.appendFormat(INDENT3 "SwitchValues: %x\n", mSwitchValues);
1969}
1970
1971// --- VibratorInputMapper ---
1972
1973VibratorInputMapper::VibratorInputMapper(InputDevice* device) :
1974        InputMapper(device), mVibrating(false) {
1975}
1976
1977VibratorInputMapper::~VibratorInputMapper() {
1978}
1979
1980uint32_t VibratorInputMapper::getSources() {
1981    return 0;
1982}
1983
1984void VibratorInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
1985    InputMapper::populateDeviceInfo(info);
1986
1987    info->setVibrator(true);
1988}
1989
1990void VibratorInputMapper::process(const RawEvent* rawEvent) {
1991    // TODO: Handle FF_STATUS, although it does not seem to be widely supported.
1992}
1993
1994void VibratorInputMapper::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
1995        int32_t token) {
1996#if DEBUG_VIBRATOR
1997    String8 patternStr;
1998    for (size_t i = 0; i < patternSize; i++) {
1999        if (i != 0) {
2000            patternStr.append(", ");
2001        }
2002        patternStr.appendFormat("%lld", pattern[i]);
2003    }
2004    ALOGD("vibrate: deviceId=%d, pattern=[%s], repeat=%ld, token=%d",
2005            getDeviceId(), patternStr.string(), repeat, token);
2006#endif
2007
2008    mVibrating = true;
2009    memcpy(mPattern, pattern, patternSize * sizeof(nsecs_t));
2010    mPatternSize = patternSize;
2011    mRepeat = repeat;
2012    mToken = token;
2013    mIndex = -1;
2014
2015    nextStep();
2016}
2017
2018void VibratorInputMapper::cancelVibrate(int32_t token) {
2019#if DEBUG_VIBRATOR
2020    ALOGD("cancelVibrate: deviceId=%d, token=%d", getDeviceId(), token);
2021#endif
2022
2023    if (mVibrating && mToken == token) {
2024        stopVibrating();
2025    }
2026}
2027
2028void VibratorInputMapper::timeoutExpired(nsecs_t when) {
2029    if (mVibrating) {
2030        if (when >= mNextStepTime) {
2031            nextStep();
2032        } else {
2033            getContext()->requestTimeoutAtTime(mNextStepTime);
2034        }
2035    }
2036}
2037
2038void VibratorInputMapper::nextStep() {
2039    mIndex += 1;
2040    if (size_t(mIndex) >= mPatternSize) {
2041        if (mRepeat < 0) {
2042            // We are done.
2043            stopVibrating();
2044            return;
2045        }
2046        mIndex = mRepeat;
2047    }
2048
2049    bool vibratorOn = mIndex & 1;
2050    nsecs_t duration = mPattern[mIndex];
2051    if (vibratorOn) {
2052#if DEBUG_VIBRATOR
2053        ALOGD("nextStep: sending vibrate deviceId=%d, duration=%lld",
2054                getDeviceId(), duration);
2055#endif
2056        getEventHub()->vibrate(getDeviceId(), duration);
2057    } else {
2058#if DEBUG_VIBRATOR
2059        ALOGD("nextStep: sending cancel vibrate deviceId=%d", getDeviceId());
2060#endif
2061        getEventHub()->cancelVibrate(getDeviceId());
2062    }
2063    nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
2064    mNextStepTime = now + duration;
2065    getContext()->requestTimeoutAtTime(mNextStepTime);
2066#if DEBUG_VIBRATOR
2067    ALOGD("nextStep: scheduled timeout in %0.3fms", duration * 0.000001f);
2068#endif
2069}
2070
2071void VibratorInputMapper::stopVibrating() {
2072    mVibrating = false;
2073#if DEBUG_VIBRATOR
2074    ALOGD("stopVibrating: sending cancel vibrate deviceId=%d", getDeviceId());
2075#endif
2076    getEventHub()->cancelVibrate(getDeviceId());
2077}
2078
2079void VibratorInputMapper::dump(String8& dump) {
2080    dump.append(INDENT2 "Vibrator Input Mapper:\n");
2081    dump.appendFormat(INDENT3 "Vibrating: %s\n", toString(mVibrating));
2082}
2083
2084
2085// --- KeyboardInputMapper ---
2086
2087KeyboardInputMapper::KeyboardInputMapper(InputDevice* device,
2088        uint32_t source, int32_t keyboardType) :
2089        InputMapper(device), mSource(source),
2090        mKeyboardType(keyboardType) {
2091}
2092
2093KeyboardInputMapper::~KeyboardInputMapper() {
2094}
2095
2096uint32_t KeyboardInputMapper::getSources() {
2097    return mSource;
2098}
2099
2100void KeyboardInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
2101    InputMapper::populateDeviceInfo(info);
2102
2103    info->setKeyboardType(mKeyboardType);
2104    info->setKeyCharacterMap(getEventHub()->getKeyCharacterMap(getDeviceId()));
2105}
2106
2107void KeyboardInputMapper::dump(String8& dump) {
2108    dump.append(INDENT2 "Keyboard Input Mapper:\n");
2109    dumpParameters(dump);
2110    dump.appendFormat(INDENT3 "KeyboardType: %d\n", mKeyboardType);
2111    dump.appendFormat(INDENT3 "Orientation: %d\n", mOrientation);
2112    dump.appendFormat(INDENT3 "KeyDowns: %zu keys currently down\n", mKeyDowns.size());
2113    dump.appendFormat(INDENT3 "MetaState: 0x%0x\n", mMetaState);
2114    dump.appendFormat(INDENT3 "DownTime: %lld\n", (long long)mDownTime);
2115}
2116
2117
2118void KeyboardInputMapper::configure(nsecs_t when,
2119        const InputReaderConfiguration* config, uint32_t changes) {
2120    InputMapper::configure(when, config, changes);
2121
2122    if (!changes) { // first time only
2123        // Configure basic parameters.
2124        configureParameters();
2125    }
2126
2127    if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {
2128        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
2129            DisplayViewport v;
2130            if (config->getDisplayInfo(false /*external*/, &v)) {
2131                mOrientation = v.orientation;
2132            } else {
2133                mOrientation = DISPLAY_ORIENTATION_0;
2134            }
2135        } else {
2136            mOrientation = DISPLAY_ORIENTATION_0;
2137        }
2138    }
2139}
2140
2141void KeyboardInputMapper::configureParameters() {
2142    mParameters.orientationAware = false;
2143    getDevice()->getConfiguration().tryGetProperty(String8("keyboard.orientationAware"),
2144            mParameters.orientationAware);
2145
2146    mParameters.hasAssociatedDisplay = false;
2147    if (mParameters.orientationAware) {
2148        mParameters.hasAssociatedDisplay = true;
2149    }
2150
2151    mParameters.handlesKeyRepeat = false;
2152    getDevice()->getConfiguration().tryGetProperty(String8("keyboard.handlesKeyRepeat"),
2153            mParameters.handlesKeyRepeat);
2154}
2155
2156void KeyboardInputMapper::dumpParameters(String8& dump) {
2157    dump.append(INDENT3 "Parameters:\n");
2158    dump.appendFormat(INDENT4 "HasAssociatedDisplay: %s\n",
2159            toString(mParameters.hasAssociatedDisplay));
2160    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
2161            toString(mParameters.orientationAware));
2162    dump.appendFormat(INDENT4 "HandlesKeyRepeat: %s\n",
2163            toString(mParameters.handlesKeyRepeat));
2164}
2165
2166void KeyboardInputMapper::reset(nsecs_t when) {
2167    mMetaState = AMETA_NONE;
2168    mDownTime = 0;
2169    mKeyDowns.clear();
2170    mCurrentHidUsage = 0;
2171
2172    resetLedState();
2173
2174    InputMapper::reset(when);
2175}
2176
2177void KeyboardInputMapper::process(const RawEvent* rawEvent) {
2178    switch (rawEvent->type) {
2179    case EV_KEY: {
2180        int32_t scanCode = rawEvent->code;
2181        int32_t usageCode = mCurrentHidUsage;
2182        mCurrentHidUsage = 0;
2183
2184        if (isKeyboardOrGamepadKey(scanCode)) {
2185            processKey(rawEvent->when, rawEvent->value != 0, scanCode, usageCode);
2186        }
2187        break;
2188    }
2189    case EV_MSC: {
2190        if (rawEvent->code == MSC_SCAN) {
2191            mCurrentHidUsage = rawEvent->value;
2192        }
2193        break;
2194    }
2195    case EV_SYN: {
2196        if (rawEvent->code == SYN_REPORT) {
2197            mCurrentHidUsage = 0;
2198        }
2199    }
2200    }
2201}
2202
2203bool KeyboardInputMapper::isKeyboardOrGamepadKey(int32_t scanCode) {
2204    return scanCode < BTN_MOUSE
2205        || scanCode >= KEY_OK
2206        || (scanCode >= BTN_MISC && scanCode < BTN_MOUSE)
2207        || (scanCode >= BTN_JOYSTICK && scanCode < BTN_DIGI);
2208}
2209
2210void KeyboardInputMapper::processKey(nsecs_t when, bool down, int32_t scanCode,
2211        int32_t usageCode) {
2212    int32_t keyCode;
2213    int32_t keyMetaState;
2214    uint32_t policyFlags;
2215
2216    if (getEventHub()->mapKey(getDeviceId(), scanCode, usageCode, mMetaState,
2217                              &keyCode, &keyMetaState, &policyFlags)) {
2218        keyCode = AKEYCODE_UNKNOWN;
2219        keyMetaState = mMetaState;
2220        policyFlags = 0;
2221    }
2222
2223    if (down) {
2224        // Rotate key codes according to orientation if needed.
2225        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
2226            keyCode = rotateKeyCode(keyCode, mOrientation);
2227        }
2228
2229        // Add key down.
2230        ssize_t keyDownIndex = findKeyDown(scanCode);
2231        if (keyDownIndex >= 0) {
2232            // key repeat, be sure to use same keycode as before in case of rotation
2233            keyCode = mKeyDowns.itemAt(keyDownIndex).keyCode;
2234        } else {
2235            // key down
2236            if ((policyFlags & POLICY_FLAG_VIRTUAL)
2237                    && mContext->shouldDropVirtualKey(when,
2238                            getDevice(), keyCode, scanCode)) {
2239                return;
2240            }
2241            if (policyFlags & POLICY_FLAG_GESTURE) {
2242                mDevice->cancelTouch(when);
2243            }
2244
2245            mKeyDowns.push();
2246            KeyDown& keyDown = mKeyDowns.editTop();
2247            keyDown.keyCode = keyCode;
2248            keyDown.scanCode = scanCode;
2249        }
2250
2251        mDownTime = when;
2252    } else {
2253        // Remove key down.
2254        ssize_t keyDownIndex = findKeyDown(scanCode);
2255        if (keyDownIndex >= 0) {
2256            // key up, be sure to use same keycode as before in case of rotation
2257            keyCode = mKeyDowns.itemAt(keyDownIndex).keyCode;
2258            mKeyDowns.removeAt(size_t(keyDownIndex));
2259        } else {
2260            // key was not actually down
2261            ALOGI("Dropping key up from device %s because the key was not down.  "
2262                    "keyCode=%d, scanCode=%d",
2263                    getDeviceName().string(), keyCode, scanCode);
2264            return;
2265        }
2266    }
2267
2268    int32_t oldMetaState = mMetaState;
2269    int32_t newMetaState = updateMetaState(keyCode, down, oldMetaState);
2270    bool metaStateChanged = oldMetaState != newMetaState;
2271    if (metaStateChanged) {
2272        mMetaState = newMetaState;
2273        updateLedState(false);
2274
2275        // If global meta state changed send it along with the key.
2276        // If it has not changed then we'll use what keymap gave us,
2277        // since key replacement logic might temporarily reset a few
2278        // meta bits for given key.
2279        keyMetaState = newMetaState;
2280    }
2281
2282    nsecs_t downTime = mDownTime;
2283
2284    // Key down on external an keyboard should wake the device.
2285    // We don't do this for internal keyboards to prevent them from waking up in your pocket.
2286    // For internal keyboards, the key layout file should specify the policy flags for
2287    // each wake key individually.
2288    // TODO: Use the input device configuration to control this behavior more finely.
2289    if (down && getDevice()->isExternal()) {
2290        policyFlags |= POLICY_FLAG_WAKE;
2291    }
2292
2293    if (mParameters.handlesKeyRepeat) {
2294        policyFlags |= POLICY_FLAG_DISABLE_KEY_REPEAT;
2295    }
2296
2297    if (metaStateChanged) {
2298        getContext()->updateGlobalMetaState();
2299    }
2300
2301    if (down && !isMetaKey(keyCode)) {
2302        getContext()->fadePointer();
2303    }
2304
2305    NotifyKeyArgs args(when, getDeviceId(), mSource, policyFlags,
2306            down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP,
2307            AKEY_EVENT_FLAG_FROM_SYSTEM, keyCode, scanCode, keyMetaState, downTime);
2308    getListener()->notifyKey(&args);
2309}
2310
2311ssize_t KeyboardInputMapper::findKeyDown(int32_t scanCode) {
2312    size_t n = mKeyDowns.size();
2313    for (size_t i = 0; i < n; i++) {
2314        if (mKeyDowns[i].scanCode == scanCode) {
2315            return i;
2316        }
2317    }
2318    return -1;
2319}
2320
2321int32_t KeyboardInputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
2322    return getEventHub()->getKeyCodeState(getDeviceId(), keyCode);
2323}
2324
2325int32_t KeyboardInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
2326    return getEventHub()->getScanCodeState(getDeviceId(), scanCode);
2327}
2328
2329bool KeyboardInputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
2330        const int32_t* keyCodes, uint8_t* outFlags) {
2331    return getEventHub()->markSupportedKeyCodes(getDeviceId(), numCodes, keyCodes, outFlags);
2332}
2333
2334int32_t KeyboardInputMapper::getMetaState() {
2335    return mMetaState;
2336}
2337
2338void KeyboardInputMapper::resetLedState() {
2339    initializeLedState(mCapsLockLedState, ALED_CAPS_LOCK);
2340    initializeLedState(mNumLockLedState, ALED_NUM_LOCK);
2341    initializeLedState(mScrollLockLedState, ALED_SCROLL_LOCK);
2342
2343    updateLedState(true);
2344}
2345
2346void KeyboardInputMapper::initializeLedState(LedState& ledState, int32_t led) {
2347    ledState.avail = getEventHub()->hasLed(getDeviceId(), led);
2348    ledState.on = false;
2349}
2350
2351void KeyboardInputMapper::updateLedState(bool reset) {
2352    updateLedStateForModifier(mCapsLockLedState, ALED_CAPS_LOCK,
2353            AMETA_CAPS_LOCK_ON, reset);
2354    updateLedStateForModifier(mNumLockLedState, ALED_NUM_LOCK,
2355            AMETA_NUM_LOCK_ON, reset);
2356    updateLedStateForModifier(mScrollLockLedState, ALED_SCROLL_LOCK,
2357            AMETA_SCROLL_LOCK_ON, reset);
2358}
2359
2360void KeyboardInputMapper::updateLedStateForModifier(LedState& ledState,
2361        int32_t led, int32_t modifier, bool reset) {
2362    if (ledState.avail) {
2363        bool desiredState = (mMetaState & modifier) != 0;
2364        if (reset || ledState.on != desiredState) {
2365            getEventHub()->setLedState(getDeviceId(), led, desiredState);
2366            ledState.on = desiredState;
2367        }
2368    }
2369}
2370
2371
2372// --- CursorInputMapper ---
2373
2374CursorInputMapper::CursorInputMapper(InputDevice* device) :
2375        InputMapper(device) {
2376}
2377
2378CursorInputMapper::~CursorInputMapper() {
2379}
2380
2381uint32_t CursorInputMapper::getSources() {
2382    return mSource;
2383}
2384
2385void CursorInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
2386    InputMapper::populateDeviceInfo(info);
2387
2388    if (mParameters.mode == Parameters::MODE_POINTER) {
2389        float minX, minY, maxX, maxY;
2390        if (mPointerController->getBounds(&minX, &minY, &maxX, &maxY)) {
2391            info->addMotionRange(AMOTION_EVENT_AXIS_X, mSource, minX, maxX, 0.0f, 0.0f, 0.0f);
2392            info->addMotionRange(AMOTION_EVENT_AXIS_Y, mSource, minY, maxY, 0.0f, 0.0f, 0.0f);
2393        }
2394    } else {
2395        info->addMotionRange(AMOTION_EVENT_AXIS_X, mSource, -1.0f, 1.0f, 0.0f, mXScale, 0.0f);
2396        info->addMotionRange(AMOTION_EVENT_AXIS_Y, mSource, -1.0f, 1.0f, 0.0f, mYScale, 0.0f);
2397    }
2398    info->addMotionRange(AMOTION_EVENT_AXIS_PRESSURE, mSource, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f);
2399
2400    if (mCursorScrollAccumulator.haveRelativeVWheel()) {
2401        info->addMotionRange(AMOTION_EVENT_AXIS_VSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
2402    }
2403    if (mCursorScrollAccumulator.haveRelativeHWheel()) {
2404        info->addMotionRange(AMOTION_EVENT_AXIS_HSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
2405    }
2406}
2407
2408void CursorInputMapper::dump(String8& dump) {
2409    dump.append(INDENT2 "Cursor Input Mapper:\n");
2410    dumpParameters(dump);
2411    dump.appendFormat(INDENT3 "XScale: %0.3f\n", mXScale);
2412    dump.appendFormat(INDENT3 "YScale: %0.3f\n", mYScale);
2413    dump.appendFormat(INDENT3 "XPrecision: %0.3f\n", mXPrecision);
2414    dump.appendFormat(INDENT3 "YPrecision: %0.3f\n", mYPrecision);
2415    dump.appendFormat(INDENT3 "HaveVWheel: %s\n",
2416            toString(mCursorScrollAccumulator.haveRelativeVWheel()));
2417    dump.appendFormat(INDENT3 "HaveHWheel: %s\n",
2418            toString(mCursorScrollAccumulator.haveRelativeHWheel()));
2419    dump.appendFormat(INDENT3 "VWheelScale: %0.3f\n", mVWheelScale);
2420    dump.appendFormat(INDENT3 "HWheelScale: %0.3f\n", mHWheelScale);
2421    dump.appendFormat(INDENT3 "Orientation: %d\n", mOrientation);
2422    dump.appendFormat(INDENT3 "ButtonState: 0x%08x\n", mButtonState);
2423    dump.appendFormat(INDENT3 "Down: %s\n", toString(isPointerDown(mButtonState)));
2424    dump.appendFormat(INDENT3 "DownTime: %lld\n", (long long)mDownTime);
2425}
2426
2427void CursorInputMapper::configure(nsecs_t when,
2428        const InputReaderConfiguration* config, uint32_t changes) {
2429    InputMapper::configure(when, config, changes);
2430
2431    if (!changes) { // first time only
2432        mCursorScrollAccumulator.configure(getDevice());
2433
2434        // Configure basic parameters.
2435        configureParameters();
2436
2437        // Configure device mode.
2438        switch (mParameters.mode) {
2439        case Parameters::MODE_POINTER:
2440            mSource = AINPUT_SOURCE_MOUSE;
2441            mXPrecision = 1.0f;
2442            mYPrecision = 1.0f;
2443            mXScale = 1.0f;
2444            mYScale = 1.0f;
2445            mPointerController = getPolicy()->obtainPointerController(getDeviceId());
2446            break;
2447        case Parameters::MODE_NAVIGATION:
2448            mSource = AINPUT_SOURCE_TRACKBALL;
2449            mXPrecision = TRACKBALL_MOVEMENT_THRESHOLD;
2450            mYPrecision = TRACKBALL_MOVEMENT_THRESHOLD;
2451            mXScale = 1.0f / TRACKBALL_MOVEMENT_THRESHOLD;
2452            mYScale = 1.0f / TRACKBALL_MOVEMENT_THRESHOLD;
2453            break;
2454        }
2455
2456        mVWheelScale = 1.0f;
2457        mHWheelScale = 1.0f;
2458    }
2459
2460    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {
2461        mPointerVelocityControl.setParameters(config->pointerVelocityControlParameters);
2462        mWheelXVelocityControl.setParameters(config->wheelVelocityControlParameters);
2463        mWheelYVelocityControl.setParameters(config->wheelVelocityControlParameters);
2464    }
2465
2466    if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {
2467        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
2468            DisplayViewport v;
2469            if (config->getDisplayInfo(false /*external*/, &v)) {
2470                mOrientation = v.orientation;
2471            } else {
2472                mOrientation = DISPLAY_ORIENTATION_0;
2473            }
2474        } else {
2475            mOrientation = DISPLAY_ORIENTATION_0;
2476        }
2477        bumpGeneration();
2478    }
2479}
2480
2481void CursorInputMapper::configureParameters() {
2482    mParameters.mode = Parameters::MODE_POINTER;
2483    String8 cursorModeString;
2484    if (getDevice()->getConfiguration().tryGetProperty(String8("cursor.mode"), cursorModeString)) {
2485        if (cursorModeString == "navigation") {
2486            mParameters.mode = Parameters::MODE_NAVIGATION;
2487        } else if (cursorModeString != "pointer" && cursorModeString != "default") {
2488            ALOGW("Invalid value for cursor.mode: '%s'", cursorModeString.string());
2489        }
2490    }
2491
2492    mParameters.orientationAware = false;
2493    getDevice()->getConfiguration().tryGetProperty(String8("cursor.orientationAware"),
2494            mParameters.orientationAware);
2495
2496    mParameters.hasAssociatedDisplay = false;
2497    if (mParameters.mode == Parameters::MODE_POINTER || mParameters.orientationAware) {
2498        mParameters.hasAssociatedDisplay = true;
2499    }
2500}
2501
2502void CursorInputMapper::dumpParameters(String8& dump) {
2503    dump.append(INDENT3 "Parameters:\n");
2504    dump.appendFormat(INDENT4 "HasAssociatedDisplay: %s\n",
2505            toString(mParameters.hasAssociatedDisplay));
2506
2507    switch (mParameters.mode) {
2508    case Parameters::MODE_POINTER:
2509        dump.append(INDENT4 "Mode: pointer\n");
2510        break;
2511    case Parameters::MODE_NAVIGATION:
2512        dump.append(INDENT4 "Mode: navigation\n");
2513        break;
2514    default:
2515        ALOG_ASSERT(false);
2516    }
2517
2518    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
2519            toString(mParameters.orientationAware));
2520}
2521
2522void CursorInputMapper::reset(nsecs_t when) {
2523    mButtonState = 0;
2524    mDownTime = 0;
2525
2526    mPointerVelocityControl.reset();
2527    mWheelXVelocityControl.reset();
2528    mWheelYVelocityControl.reset();
2529
2530    mCursorButtonAccumulator.reset(getDevice());
2531    mCursorMotionAccumulator.reset(getDevice());
2532    mCursorScrollAccumulator.reset(getDevice());
2533
2534    InputMapper::reset(when);
2535}
2536
2537void CursorInputMapper::process(const RawEvent* rawEvent) {
2538    mCursorButtonAccumulator.process(rawEvent);
2539    mCursorMotionAccumulator.process(rawEvent);
2540    mCursorScrollAccumulator.process(rawEvent);
2541
2542    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
2543        sync(rawEvent->when);
2544    }
2545}
2546
2547void CursorInputMapper::sync(nsecs_t when) {
2548    int32_t lastButtonState = mButtonState;
2549    int32_t currentButtonState = mCursorButtonAccumulator.getButtonState();
2550    mButtonState = currentButtonState;
2551
2552    bool wasDown = isPointerDown(lastButtonState);
2553    bool down = isPointerDown(currentButtonState);
2554    bool downChanged;
2555    if (!wasDown && down) {
2556        mDownTime = when;
2557        downChanged = true;
2558    } else if (wasDown && !down) {
2559        downChanged = true;
2560    } else {
2561        downChanged = false;
2562    }
2563    nsecs_t downTime = mDownTime;
2564    bool buttonsChanged = currentButtonState != lastButtonState;
2565    int32_t buttonsPressed = currentButtonState & ~lastButtonState;
2566    int32_t buttonsReleased = lastButtonState & ~currentButtonState;
2567
2568    float deltaX = mCursorMotionAccumulator.getRelativeX() * mXScale;
2569    float deltaY = mCursorMotionAccumulator.getRelativeY() * mYScale;
2570    bool moved = deltaX != 0 || deltaY != 0;
2571
2572    // Rotate delta according to orientation if needed.
2573    if (mParameters.orientationAware && mParameters.hasAssociatedDisplay
2574            && (deltaX != 0.0f || deltaY != 0.0f)) {
2575        rotateDelta(mOrientation, &deltaX, &deltaY);
2576    }
2577
2578    // Move the pointer.
2579    PointerProperties pointerProperties;
2580    pointerProperties.clear();
2581    pointerProperties.id = 0;
2582    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_MOUSE;
2583
2584    PointerCoords pointerCoords;
2585    pointerCoords.clear();
2586
2587    float vscroll = mCursorScrollAccumulator.getRelativeVWheel();
2588    float hscroll = mCursorScrollAccumulator.getRelativeHWheel();
2589    bool scrolled = vscroll != 0 || hscroll != 0;
2590
2591    mWheelYVelocityControl.move(when, NULL, &vscroll);
2592    mWheelXVelocityControl.move(when, &hscroll, NULL);
2593
2594    mPointerVelocityControl.move(when, &deltaX, &deltaY);
2595
2596    int32_t displayId;
2597    if (mPointerController != NULL) {
2598        if (moved || scrolled || buttonsChanged) {
2599            mPointerController->setPresentation(
2600                    PointerControllerInterface::PRESENTATION_POINTER);
2601
2602            if (moved) {
2603                mPointerController->move(deltaX, deltaY);
2604            }
2605
2606            if (buttonsChanged) {
2607                mPointerController->setButtonState(currentButtonState);
2608            }
2609
2610            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
2611        }
2612
2613        float x, y;
2614        mPointerController->getPosition(&x, &y);
2615        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
2616        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
2617        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X, deltaX);
2618        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y, deltaY);
2619        displayId = ADISPLAY_ID_DEFAULT;
2620    } else {
2621        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, deltaX);
2622        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, deltaY);
2623        displayId = ADISPLAY_ID_NONE;
2624    }
2625
2626    pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, down ? 1.0f : 0.0f);
2627
2628    // Moving an external trackball or mouse should wake the device.
2629    // We don't do this for internal cursor devices to prevent them from waking up
2630    // the device in your pocket.
2631    // TODO: Use the input device configuration to control this behavior more finely.
2632    uint32_t policyFlags = 0;
2633    if ((buttonsPressed || moved || scrolled) && getDevice()->isExternal()) {
2634        policyFlags |= POLICY_FLAG_WAKE;
2635    }
2636
2637    // Synthesize key down from buttons if needed.
2638    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
2639            policyFlags, lastButtonState, currentButtonState);
2640
2641    // Send motion event.
2642    if (downChanged || moved || scrolled || buttonsChanged) {
2643        int32_t metaState = mContext->getGlobalMetaState();
2644        int32_t buttonState = lastButtonState;
2645        int32_t motionEventAction;
2646        if (downChanged) {
2647            motionEventAction = down ? AMOTION_EVENT_ACTION_DOWN : AMOTION_EVENT_ACTION_UP;
2648        } else if (down || mPointerController == NULL) {
2649            motionEventAction = AMOTION_EVENT_ACTION_MOVE;
2650        } else {
2651            motionEventAction = AMOTION_EVENT_ACTION_HOVER_MOVE;
2652        }
2653
2654        if (buttonsReleased) {
2655            BitSet32 released(buttonsReleased);
2656            while (!released.isEmpty()) {
2657                int32_t actionButton = BitSet32::valueForBit(released.clearFirstMarkedBit());
2658                buttonState &= ~actionButton;
2659                NotifyMotionArgs releaseArgs(when, getDeviceId(), mSource, policyFlags,
2660                        AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton, 0,
2661                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
2662                        displayId, 1, &pointerProperties, &pointerCoords,
2663                        mXPrecision, mYPrecision, downTime);
2664                getListener()->notifyMotion(&releaseArgs);
2665            }
2666        }
2667
2668        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
2669                motionEventAction, 0, 0, metaState, currentButtonState,
2670                AMOTION_EVENT_EDGE_FLAG_NONE,
2671                displayId, 1, &pointerProperties, &pointerCoords,
2672                mXPrecision, mYPrecision, downTime);
2673        getListener()->notifyMotion(&args);
2674
2675        if (buttonsPressed) {
2676            BitSet32 pressed(buttonsPressed);
2677            while (!pressed.isEmpty()) {
2678                int32_t actionButton = BitSet32::valueForBit(pressed.clearFirstMarkedBit());
2679                buttonState |= actionButton;
2680                NotifyMotionArgs pressArgs(when, getDeviceId(), mSource, policyFlags,
2681                        AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton, 0,
2682                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
2683                        displayId, 1, &pointerProperties, &pointerCoords,
2684                        mXPrecision, mYPrecision, downTime);
2685                getListener()->notifyMotion(&pressArgs);
2686            }
2687        }
2688
2689        ALOG_ASSERT(buttonState == currentButtonState);
2690
2691        // Send hover move after UP to tell the application that the mouse is hovering now.
2692        if (motionEventAction == AMOTION_EVENT_ACTION_UP
2693                && mPointerController != NULL) {
2694            NotifyMotionArgs hoverArgs(when, getDeviceId(), mSource, policyFlags,
2695                    AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
2696                    metaState, currentButtonState, AMOTION_EVENT_EDGE_FLAG_NONE,
2697                    displayId, 1, &pointerProperties, &pointerCoords,
2698                    mXPrecision, mYPrecision, downTime);
2699            getListener()->notifyMotion(&hoverArgs);
2700        }
2701
2702        // Send scroll events.
2703        if (scrolled) {
2704            pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
2705            pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
2706
2707            NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
2708                    AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, currentButtonState,
2709                    AMOTION_EVENT_EDGE_FLAG_NONE,
2710                    displayId, 1, &pointerProperties, &pointerCoords,
2711                    mXPrecision, mYPrecision, downTime);
2712            getListener()->notifyMotion(&scrollArgs);
2713        }
2714    }
2715
2716    // Synthesize key up from buttons if needed.
2717    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
2718            policyFlags, lastButtonState, currentButtonState);
2719
2720    mCursorMotionAccumulator.finishSync();
2721    mCursorScrollAccumulator.finishSync();
2722}
2723
2724int32_t CursorInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
2725    if (scanCode >= BTN_MOUSE && scanCode < BTN_JOYSTICK) {
2726        return getEventHub()->getScanCodeState(getDeviceId(), scanCode);
2727    } else {
2728        return AKEY_STATE_UNKNOWN;
2729    }
2730}
2731
2732void CursorInputMapper::fadePointer() {
2733    if (mPointerController != NULL) {
2734        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
2735    }
2736}
2737
2738// --- RotaryEncoderInputMapper ---
2739
2740RotaryEncoderInputMapper::RotaryEncoderInputMapper(InputDevice* device) :
2741        InputMapper(device) {
2742    mSource = AINPUT_SOURCE_ROTARY_ENCODER;
2743}
2744
2745RotaryEncoderInputMapper::~RotaryEncoderInputMapper() {
2746}
2747
2748uint32_t RotaryEncoderInputMapper::getSources() {
2749    return mSource;
2750}
2751
2752void RotaryEncoderInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
2753    InputMapper::populateDeviceInfo(info);
2754
2755    if (mRotaryEncoderScrollAccumulator.haveRelativeVWheel()) {
2756        info->addMotionRange(AMOTION_EVENT_AXIS_SCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
2757    }
2758}
2759
2760void RotaryEncoderInputMapper::dump(String8& dump) {
2761    dump.append(INDENT2 "Rotary Encoder Input Mapper:\n");
2762    dump.appendFormat(INDENT3 "HaveWheel: %s\n",
2763            toString(mRotaryEncoderScrollAccumulator.haveRelativeVWheel()));
2764}
2765
2766void RotaryEncoderInputMapper::configure(nsecs_t when,
2767        const InputReaderConfiguration* config, uint32_t changes) {
2768    InputMapper::configure(when, config, changes);
2769    if (!changes) {
2770        mRotaryEncoderScrollAccumulator.configure(getDevice());
2771    }
2772}
2773
2774void RotaryEncoderInputMapper::reset(nsecs_t when) {
2775    mRotaryEncoderScrollAccumulator.reset(getDevice());
2776
2777    InputMapper::reset(when);
2778}
2779
2780void RotaryEncoderInputMapper::process(const RawEvent* rawEvent) {
2781    mRotaryEncoderScrollAccumulator.process(rawEvent);
2782
2783    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
2784        sync(rawEvent->when);
2785    }
2786}
2787
2788void RotaryEncoderInputMapper::sync(nsecs_t when) {
2789    PointerCoords pointerCoords;
2790    pointerCoords.clear();
2791
2792    PointerProperties pointerProperties;
2793    pointerProperties.clear();
2794    pointerProperties.id = 0;
2795    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
2796
2797    float scroll = mRotaryEncoderScrollAccumulator.getRelativeVWheel();
2798    bool scrolled = scroll != 0;
2799
2800    // This is not a pointer, so it's not associated with a display.
2801    int32_t displayId = ADISPLAY_ID_NONE;
2802
2803    // Moving the rotary encoder should wake the device (if specified).
2804    uint32_t policyFlags = 0;
2805    if (scrolled && getDevice()->isExternal()) {
2806        policyFlags |= POLICY_FLAG_WAKE;
2807    }
2808
2809    // Send motion event.
2810    if (scrolled) {
2811        int32_t metaState = mContext->getGlobalMetaState();
2812        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_SCROLL, scroll);
2813
2814        NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
2815                AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, 0,
2816                AMOTION_EVENT_EDGE_FLAG_NONE,
2817                displayId, 1, &pointerProperties, &pointerCoords,
2818                0, 0, 0);
2819        getListener()->notifyMotion(&scrollArgs);
2820    }
2821
2822    mRotaryEncoderScrollAccumulator.finishSync();
2823}
2824
2825// --- TouchInputMapper ---
2826
2827TouchInputMapper::TouchInputMapper(InputDevice* device) :
2828        InputMapper(device),
2829        mSource(0), mDeviceMode(DEVICE_MODE_DISABLED),
2830        mSurfaceWidth(-1), mSurfaceHeight(-1), mSurfaceLeft(0), mSurfaceTop(0),
2831        mSurfaceOrientation(DISPLAY_ORIENTATION_0) {
2832}
2833
2834TouchInputMapper::~TouchInputMapper() {
2835}
2836
2837uint32_t TouchInputMapper::getSources() {
2838    return mSource;
2839}
2840
2841void TouchInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
2842    InputMapper::populateDeviceInfo(info);
2843
2844    if (mDeviceMode != DEVICE_MODE_DISABLED) {
2845        info->addMotionRange(mOrientedRanges.x);
2846        info->addMotionRange(mOrientedRanges.y);
2847        info->addMotionRange(mOrientedRanges.pressure);
2848
2849        if (mOrientedRanges.haveSize) {
2850            info->addMotionRange(mOrientedRanges.size);
2851        }
2852
2853        if (mOrientedRanges.haveTouchSize) {
2854            info->addMotionRange(mOrientedRanges.touchMajor);
2855            info->addMotionRange(mOrientedRanges.touchMinor);
2856        }
2857
2858        if (mOrientedRanges.haveToolSize) {
2859            info->addMotionRange(mOrientedRanges.toolMajor);
2860            info->addMotionRange(mOrientedRanges.toolMinor);
2861        }
2862
2863        if (mOrientedRanges.haveOrientation) {
2864            info->addMotionRange(mOrientedRanges.orientation);
2865        }
2866
2867        if (mOrientedRanges.haveDistance) {
2868            info->addMotionRange(mOrientedRanges.distance);
2869        }
2870
2871        if (mOrientedRanges.haveTilt) {
2872            info->addMotionRange(mOrientedRanges.tilt);
2873        }
2874
2875        if (mCursorScrollAccumulator.haveRelativeVWheel()) {
2876            info->addMotionRange(AMOTION_EVENT_AXIS_VSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
2877                    0.0f);
2878        }
2879        if (mCursorScrollAccumulator.haveRelativeHWheel()) {
2880            info->addMotionRange(AMOTION_EVENT_AXIS_HSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
2881                    0.0f);
2882        }
2883        if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_BOX) {
2884            const InputDeviceInfo::MotionRange& x = mOrientedRanges.x;
2885            const InputDeviceInfo::MotionRange& y = mOrientedRanges.y;
2886            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_1, mSource, x.min, x.max, x.flat,
2887                    x.fuzz, x.resolution);
2888            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_2, mSource, y.min, y.max, y.flat,
2889                    y.fuzz, y.resolution);
2890            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_3, mSource, x.min, x.max, x.flat,
2891                    x.fuzz, x.resolution);
2892            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_4, mSource, y.min, y.max, y.flat,
2893                    y.fuzz, y.resolution);
2894        }
2895        info->setButtonUnderPad(mParameters.hasButtonUnderPad);
2896    }
2897}
2898
2899void TouchInputMapper::dump(String8& dump) {
2900    dump.append(INDENT2 "Touch Input Mapper:\n");
2901    dumpParameters(dump);
2902    dumpVirtualKeys(dump);
2903    dumpRawPointerAxes(dump);
2904    dumpCalibration(dump);
2905    dumpAffineTransformation(dump);
2906    dumpSurface(dump);
2907
2908    dump.appendFormat(INDENT3 "Translation and Scaling Factors:\n");
2909    dump.appendFormat(INDENT4 "XTranslate: %0.3f\n", mXTranslate);
2910    dump.appendFormat(INDENT4 "YTranslate: %0.3f\n", mYTranslate);
2911    dump.appendFormat(INDENT4 "XScale: %0.3f\n", mXScale);
2912    dump.appendFormat(INDENT4 "YScale: %0.3f\n", mYScale);
2913    dump.appendFormat(INDENT4 "XPrecision: %0.3f\n", mXPrecision);
2914    dump.appendFormat(INDENT4 "YPrecision: %0.3f\n", mYPrecision);
2915    dump.appendFormat(INDENT4 "GeometricScale: %0.3f\n", mGeometricScale);
2916    dump.appendFormat(INDENT4 "PressureScale: %0.3f\n", mPressureScale);
2917    dump.appendFormat(INDENT4 "SizeScale: %0.3f\n", mSizeScale);
2918    dump.appendFormat(INDENT4 "OrientationScale: %0.3f\n", mOrientationScale);
2919    dump.appendFormat(INDENT4 "DistanceScale: %0.3f\n", mDistanceScale);
2920    dump.appendFormat(INDENT4 "HaveTilt: %s\n", toString(mHaveTilt));
2921    dump.appendFormat(INDENT4 "TiltXCenter: %0.3f\n", mTiltXCenter);
2922    dump.appendFormat(INDENT4 "TiltXScale: %0.3f\n", mTiltXScale);
2923    dump.appendFormat(INDENT4 "TiltYCenter: %0.3f\n", mTiltYCenter);
2924    dump.appendFormat(INDENT4 "TiltYScale: %0.3f\n", mTiltYScale);
2925
2926    dump.appendFormat(INDENT3 "Last Raw Button State: 0x%08x\n", mLastRawState.buttonState);
2927    dump.appendFormat(INDENT3 "Last Raw Touch: pointerCount=%d\n",
2928            mLastRawState.rawPointerData.pointerCount);
2929    for (uint32_t i = 0; i < mLastRawState.rawPointerData.pointerCount; i++) {
2930        const RawPointerData::Pointer& pointer = mLastRawState.rawPointerData.pointers[i];
2931        dump.appendFormat(INDENT4 "[%d]: id=%d, x=%d, y=%d, pressure=%d, "
2932                "touchMajor=%d, touchMinor=%d, toolMajor=%d, toolMinor=%d, "
2933                "orientation=%d, tiltX=%d, tiltY=%d, distance=%d, "
2934                "toolType=%d, isHovering=%s\n", i,
2935                pointer.id, pointer.x, pointer.y, pointer.pressure,
2936                pointer.touchMajor, pointer.touchMinor,
2937                pointer.toolMajor, pointer.toolMinor,
2938                pointer.orientation, pointer.tiltX, pointer.tiltY, pointer.distance,
2939                pointer.toolType, toString(pointer.isHovering));
2940    }
2941
2942    dump.appendFormat(INDENT3 "Last Cooked Button State: 0x%08x\n", mLastCookedState.buttonState);
2943    dump.appendFormat(INDENT3 "Last Cooked Touch: pointerCount=%d\n",
2944            mLastCookedState.cookedPointerData.pointerCount);
2945    for (uint32_t i = 0; i < mLastCookedState.cookedPointerData.pointerCount; i++) {
2946        const PointerProperties& pointerProperties =
2947                mLastCookedState.cookedPointerData.pointerProperties[i];
2948        const PointerCoords& pointerCoords = mLastCookedState.cookedPointerData.pointerCoords[i];
2949        dump.appendFormat(INDENT4 "[%d]: id=%d, x=%0.3f, y=%0.3f, pressure=%0.3f, "
2950                "touchMajor=%0.3f, touchMinor=%0.3f, toolMajor=%0.3f, toolMinor=%0.3f, "
2951                "orientation=%0.3f, tilt=%0.3f, distance=%0.3f, "
2952                "toolType=%d, isHovering=%s\n", i,
2953                pointerProperties.id,
2954                pointerCoords.getX(),
2955                pointerCoords.getY(),
2956                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE),
2957                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR),
2958                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
2959                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
2960                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
2961                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION),
2962                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TILT),
2963                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_DISTANCE),
2964                pointerProperties.toolType,
2965                toString(mLastCookedState.cookedPointerData.isHovering(i)));
2966    }
2967
2968    dump.append(INDENT3 "Stylus Fusion:\n");
2969    dump.appendFormat(INDENT4 "ExternalStylusConnected: %s\n",
2970            toString(mExternalStylusConnected));
2971    dump.appendFormat(INDENT4 "External Stylus ID: %" PRId64 "\n", mExternalStylusId);
2972    dump.appendFormat(INDENT4 "External Stylus Data Timeout: %" PRId64 "\n",
2973            mExternalStylusFusionTimeout);
2974    dump.append(INDENT3 "External Stylus State:\n");
2975    dumpStylusState(dump, mExternalStylusState);
2976
2977    if (mDeviceMode == DEVICE_MODE_POINTER) {
2978        dump.appendFormat(INDENT3 "Pointer Gesture Detector:\n");
2979        dump.appendFormat(INDENT4 "XMovementScale: %0.3f\n",
2980                mPointerXMovementScale);
2981        dump.appendFormat(INDENT4 "YMovementScale: %0.3f\n",
2982                mPointerYMovementScale);
2983        dump.appendFormat(INDENT4 "XZoomScale: %0.3f\n",
2984                mPointerXZoomScale);
2985        dump.appendFormat(INDENT4 "YZoomScale: %0.3f\n",
2986                mPointerYZoomScale);
2987        dump.appendFormat(INDENT4 "MaxSwipeWidth: %f\n",
2988                mPointerGestureMaxSwipeWidth);
2989    }
2990}
2991
2992void TouchInputMapper::configure(nsecs_t when,
2993        const InputReaderConfiguration* config, uint32_t changes) {
2994    InputMapper::configure(when, config, changes);
2995
2996    mConfig = *config;
2997
2998    if (!changes) { // first time only
2999        // Configure basic parameters.
3000        configureParameters();
3001
3002        // Configure common accumulators.
3003        mCursorScrollAccumulator.configure(getDevice());
3004        mTouchButtonAccumulator.configure(getDevice());
3005
3006        // Configure absolute axis information.
3007        configureRawPointerAxes();
3008
3009        // Prepare input device calibration.
3010        parseCalibration();
3011        resolveCalibration();
3012    }
3013
3014    if (!changes || (changes & InputReaderConfiguration::CHANGE_TOUCH_AFFINE_TRANSFORMATION)) {
3015        // Update location calibration to reflect current settings
3016        updateAffineTransformation();
3017    }
3018
3019    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {
3020        // Update pointer speed.
3021        mPointerVelocityControl.setParameters(mConfig.pointerVelocityControlParameters);
3022        mWheelXVelocityControl.setParameters(mConfig.wheelVelocityControlParameters);
3023        mWheelYVelocityControl.setParameters(mConfig.wheelVelocityControlParameters);
3024    }
3025
3026    bool resetNeeded = false;
3027    if (!changes || (changes & (InputReaderConfiguration::CHANGE_DISPLAY_INFO
3028            | InputReaderConfiguration::CHANGE_POINTER_GESTURE_ENABLEMENT
3029            | InputReaderConfiguration::CHANGE_SHOW_TOUCHES
3030            | InputReaderConfiguration::CHANGE_EXTERNAL_STYLUS_PRESENCE))) {
3031        // Configure device sources, surface dimensions, orientation and
3032        // scaling factors.
3033        configureSurface(when, &resetNeeded);
3034    }
3035
3036    if (changes && resetNeeded) {
3037        // Send reset, unless this is the first time the device has been configured,
3038        // in which case the reader will call reset itself after all mappers are ready.
3039        getDevice()->notifyReset(when);
3040    }
3041}
3042
3043void TouchInputMapper::resolveExternalStylusPresence() {
3044    Vector<InputDeviceInfo> devices;
3045    mContext->getExternalStylusDevices(devices);
3046    mExternalStylusConnected = !devices.isEmpty();
3047
3048    if (!mExternalStylusConnected) {
3049        resetExternalStylus();
3050    }
3051}
3052
3053void TouchInputMapper::configureParameters() {
3054    // Use the pointer presentation mode for devices that do not support distinct
3055    // multitouch.  The spot-based presentation relies on being able to accurately
3056    // locate two or more fingers on the touch pad.
3057    mParameters.gestureMode = getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_SEMI_MT)
3058            ? Parameters::GESTURE_MODE_SINGLE_TOUCH : Parameters::GESTURE_MODE_MULTI_TOUCH;
3059
3060    String8 gestureModeString;
3061    if (getDevice()->getConfiguration().tryGetProperty(String8("touch.gestureMode"),
3062            gestureModeString)) {
3063        if (gestureModeString == "single-touch") {
3064            mParameters.gestureMode = Parameters::GESTURE_MODE_SINGLE_TOUCH;
3065        } else if (gestureModeString == "multi-touch") {
3066            mParameters.gestureMode = Parameters::GESTURE_MODE_MULTI_TOUCH;
3067        } else if (gestureModeString != "default") {
3068            ALOGW("Invalid value for touch.gestureMode: '%s'", gestureModeString.string());
3069        }
3070    }
3071
3072    if (getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_DIRECT)) {
3073        // The device is a touch screen.
3074        mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_SCREEN;
3075    } else if (getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_POINTER)) {
3076        // The device is a pointing device like a track pad.
3077        mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
3078    } else if (getEventHub()->hasRelativeAxis(getDeviceId(), REL_X)
3079            || getEventHub()->hasRelativeAxis(getDeviceId(), REL_Y)) {
3080        // The device is a cursor device with a touch pad attached.
3081        // By default don't use the touch pad to move the pointer.
3082        mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_PAD;
3083    } else {
3084        // The device is a touch pad of unknown purpose.
3085        mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
3086    }
3087
3088    mParameters.hasButtonUnderPad=
3089            getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_BUTTONPAD);
3090
3091    String8 deviceTypeString;
3092    if (getDevice()->getConfiguration().tryGetProperty(String8("touch.deviceType"),
3093            deviceTypeString)) {
3094        if (deviceTypeString == "touchScreen") {
3095            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_SCREEN;
3096        } else if (deviceTypeString == "touchPad") {
3097            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_PAD;
3098        } else if (deviceTypeString == "touchNavigation") {
3099            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_NAVIGATION;
3100        } else if (deviceTypeString == "pointer") {
3101            mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
3102        } else if (deviceTypeString != "default") {
3103            ALOGW("Invalid value for touch.deviceType: '%s'", deviceTypeString.string());
3104        }
3105    }
3106
3107    mParameters.orientationAware = mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN;
3108    getDevice()->getConfiguration().tryGetProperty(String8("touch.orientationAware"),
3109            mParameters.orientationAware);
3110
3111    mParameters.hasAssociatedDisplay = false;
3112    mParameters.associatedDisplayIsExternal = false;
3113    if (mParameters.orientationAware
3114            || mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
3115            || mParameters.deviceType == Parameters::DEVICE_TYPE_POINTER) {
3116        mParameters.hasAssociatedDisplay = true;
3117        mParameters.associatedDisplayIsExternal =
3118                mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
3119                        && getDevice()->isExternal();
3120    }
3121
3122    // Initial downs on external touch devices should wake the device.
3123    // Normally we don't do this for internal touch screens to prevent them from waking
3124    // up in your pocket but you can enable it using the input device configuration.
3125    mParameters.wake = getDevice()->isExternal();
3126    getDevice()->getConfiguration().tryGetProperty(String8("touch.wake"),
3127            mParameters.wake);
3128}
3129
3130void TouchInputMapper::dumpParameters(String8& dump) {
3131    dump.append(INDENT3 "Parameters:\n");
3132
3133    switch (mParameters.gestureMode) {
3134    case Parameters::GESTURE_MODE_SINGLE_TOUCH:
3135        dump.append(INDENT4 "GestureMode: single-touch\n");
3136        break;
3137    case Parameters::GESTURE_MODE_MULTI_TOUCH:
3138        dump.append(INDENT4 "GestureMode: multi-touch\n");
3139        break;
3140    default:
3141        assert(false);
3142    }
3143
3144    switch (mParameters.deviceType) {
3145    case Parameters::DEVICE_TYPE_TOUCH_SCREEN:
3146        dump.append(INDENT4 "DeviceType: touchScreen\n");
3147        break;
3148    case Parameters::DEVICE_TYPE_TOUCH_PAD:
3149        dump.append(INDENT4 "DeviceType: touchPad\n");
3150        break;
3151    case Parameters::DEVICE_TYPE_TOUCH_NAVIGATION:
3152        dump.append(INDENT4 "DeviceType: touchNavigation\n");
3153        break;
3154    case Parameters::DEVICE_TYPE_POINTER:
3155        dump.append(INDENT4 "DeviceType: pointer\n");
3156        break;
3157    default:
3158        ALOG_ASSERT(false);
3159    }
3160
3161    dump.appendFormat(INDENT4 "AssociatedDisplay: hasAssociatedDisplay=%s, isExternal=%s\n",
3162            toString(mParameters.hasAssociatedDisplay),
3163            toString(mParameters.associatedDisplayIsExternal));
3164    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
3165            toString(mParameters.orientationAware));
3166}
3167
3168void TouchInputMapper::configureRawPointerAxes() {
3169    mRawPointerAxes.clear();
3170}
3171
3172void TouchInputMapper::dumpRawPointerAxes(String8& dump) {
3173    dump.append(INDENT3 "Raw Touch Axes:\n");
3174    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.x, "X");
3175    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.y, "Y");
3176    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.pressure, "Pressure");
3177    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.touchMajor, "TouchMajor");
3178    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.touchMinor, "TouchMinor");
3179    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.toolMajor, "ToolMajor");
3180    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.toolMinor, "ToolMinor");
3181    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.orientation, "Orientation");
3182    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.distance, "Distance");
3183    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.tiltX, "TiltX");
3184    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.tiltY, "TiltY");
3185    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.trackingId, "TrackingId");
3186    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.slot, "Slot");
3187}
3188
3189bool TouchInputMapper::hasExternalStylus() const {
3190    return mExternalStylusConnected;
3191}
3192
3193void TouchInputMapper::configureSurface(nsecs_t when, bool* outResetNeeded) {
3194    int32_t oldDeviceMode = mDeviceMode;
3195
3196    resolveExternalStylusPresence();
3197
3198    // Determine device mode.
3199    if (mParameters.deviceType == Parameters::DEVICE_TYPE_POINTER
3200            && mConfig.pointerGesturesEnabled) {
3201        mSource = AINPUT_SOURCE_MOUSE;
3202        mDeviceMode = DEVICE_MODE_POINTER;
3203        if (hasStylus()) {
3204            mSource |= AINPUT_SOURCE_STYLUS;
3205        }
3206    } else if (mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
3207            && mParameters.hasAssociatedDisplay) {
3208        mSource = AINPUT_SOURCE_TOUCHSCREEN;
3209        mDeviceMode = DEVICE_MODE_DIRECT;
3210        if (hasStylus()) {
3211            mSource |= AINPUT_SOURCE_STYLUS;
3212        }
3213        if (hasExternalStylus()) {
3214            mSource |= AINPUT_SOURCE_BLUETOOTH_STYLUS;
3215        }
3216    } else if (mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_NAVIGATION) {
3217        mSource = AINPUT_SOURCE_TOUCH_NAVIGATION;
3218        mDeviceMode = DEVICE_MODE_NAVIGATION;
3219    } else {
3220        mSource = AINPUT_SOURCE_TOUCHPAD;
3221        mDeviceMode = DEVICE_MODE_UNSCALED;
3222    }
3223
3224    // Ensure we have valid X and Y axes.
3225    if (!mRawPointerAxes.x.valid || !mRawPointerAxes.y.valid) {
3226        ALOGW(INDENT "Touch device '%s' did not report support for X or Y axis!  "
3227                "The device will be inoperable.", getDeviceName().string());
3228        mDeviceMode = DEVICE_MODE_DISABLED;
3229        return;
3230    }
3231
3232    // Raw width and height in the natural orientation.
3233    int32_t rawWidth = mRawPointerAxes.x.maxValue - mRawPointerAxes.x.minValue + 1;
3234    int32_t rawHeight = mRawPointerAxes.y.maxValue - mRawPointerAxes.y.minValue + 1;
3235
3236    // Get associated display dimensions.
3237    DisplayViewport newViewport;
3238    if (mParameters.hasAssociatedDisplay) {
3239        if (!mConfig.getDisplayInfo(mParameters.associatedDisplayIsExternal, &newViewport)) {
3240            ALOGI(INDENT "Touch device '%s' could not query the properties of its associated "
3241                    "display.  The device will be inoperable until the display size "
3242                    "becomes available.",
3243                    getDeviceName().string());
3244            mDeviceMode = DEVICE_MODE_DISABLED;
3245            return;
3246        }
3247    } else {
3248        newViewport.setNonDisplayViewport(rawWidth, rawHeight);
3249    }
3250    bool viewportChanged = mViewport != newViewport;
3251    if (viewportChanged) {
3252        mViewport = newViewport;
3253
3254        if (mDeviceMode == DEVICE_MODE_DIRECT || mDeviceMode == DEVICE_MODE_POINTER) {
3255            // Convert rotated viewport to natural surface coordinates.
3256            int32_t naturalLogicalWidth, naturalLogicalHeight;
3257            int32_t naturalPhysicalWidth, naturalPhysicalHeight;
3258            int32_t naturalPhysicalLeft, naturalPhysicalTop;
3259            int32_t naturalDeviceWidth, naturalDeviceHeight;
3260            switch (mViewport.orientation) {
3261            case DISPLAY_ORIENTATION_90:
3262                naturalLogicalWidth = mViewport.logicalBottom - mViewport.logicalTop;
3263                naturalLogicalHeight = mViewport.logicalRight - mViewport.logicalLeft;
3264                naturalPhysicalWidth = mViewport.physicalBottom - mViewport.physicalTop;
3265                naturalPhysicalHeight = mViewport.physicalRight - mViewport.physicalLeft;
3266                naturalPhysicalLeft = mViewport.deviceHeight - mViewport.physicalBottom;
3267                naturalPhysicalTop = mViewport.physicalLeft;
3268                naturalDeviceWidth = mViewport.deviceHeight;
3269                naturalDeviceHeight = mViewport.deviceWidth;
3270                break;
3271            case DISPLAY_ORIENTATION_180:
3272                naturalLogicalWidth = mViewport.logicalRight - mViewport.logicalLeft;
3273                naturalLogicalHeight = mViewport.logicalBottom - mViewport.logicalTop;
3274                naturalPhysicalWidth = mViewport.physicalRight - mViewport.physicalLeft;
3275                naturalPhysicalHeight = mViewport.physicalBottom - mViewport.physicalTop;
3276                naturalPhysicalLeft = mViewport.deviceWidth - mViewport.physicalRight;
3277                naturalPhysicalTop = mViewport.deviceHeight - mViewport.physicalBottom;
3278                naturalDeviceWidth = mViewport.deviceWidth;
3279                naturalDeviceHeight = mViewport.deviceHeight;
3280                break;
3281            case DISPLAY_ORIENTATION_270:
3282                naturalLogicalWidth = mViewport.logicalBottom - mViewport.logicalTop;
3283                naturalLogicalHeight = mViewport.logicalRight - mViewport.logicalLeft;
3284                naturalPhysicalWidth = mViewport.physicalBottom - mViewport.physicalTop;
3285                naturalPhysicalHeight = mViewport.physicalRight - mViewport.physicalLeft;
3286                naturalPhysicalLeft = mViewport.physicalTop;
3287                naturalPhysicalTop = mViewport.deviceWidth - mViewport.physicalRight;
3288                naturalDeviceWidth = mViewport.deviceHeight;
3289                naturalDeviceHeight = mViewport.deviceWidth;
3290                break;
3291            case DISPLAY_ORIENTATION_0:
3292            default:
3293                naturalLogicalWidth = mViewport.logicalRight - mViewport.logicalLeft;
3294                naturalLogicalHeight = mViewport.logicalBottom - mViewport.logicalTop;
3295                naturalPhysicalWidth = mViewport.physicalRight - mViewport.physicalLeft;
3296                naturalPhysicalHeight = mViewport.physicalBottom - mViewport.physicalTop;
3297                naturalPhysicalLeft = mViewport.physicalLeft;
3298                naturalPhysicalTop = mViewport.physicalTop;
3299                naturalDeviceWidth = mViewport.deviceWidth;
3300                naturalDeviceHeight = mViewport.deviceHeight;
3301                break;
3302            }
3303
3304            mSurfaceWidth = naturalLogicalWidth * naturalDeviceWidth / naturalPhysicalWidth;
3305            mSurfaceHeight = naturalLogicalHeight * naturalDeviceHeight / naturalPhysicalHeight;
3306            mSurfaceLeft = naturalPhysicalLeft * naturalLogicalWidth / naturalPhysicalWidth;
3307            mSurfaceTop = naturalPhysicalTop * naturalLogicalHeight / naturalPhysicalHeight;
3308
3309            mSurfaceOrientation = mParameters.orientationAware ?
3310                    mViewport.orientation : DISPLAY_ORIENTATION_0;
3311        } else {
3312            mSurfaceWidth = rawWidth;
3313            mSurfaceHeight = rawHeight;
3314            mSurfaceLeft = 0;
3315            mSurfaceTop = 0;
3316            mSurfaceOrientation = DISPLAY_ORIENTATION_0;
3317        }
3318    }
3319
3320    // If moving between pointer modes, need to reset some state.
3321    bool deviceModeChanged = mDeviceMode != oldDeviceMode;
3322    if (deviceModeChanged) {
3323        mOrientedRanges.clear();
3324    }
3325
3326    // Create pointer controller if needed.
3327    if (mDeviceMode == DEVICE_MODE_POINTER ||
3328            (mDeviceMode == DEVICE_MODE_DIRECT && mConfig.showTouches)) {
3329        if (mPointerController == NULL) {
3330            mPointerController = getPolicy()->obtainPointerController(getDeviceId());
3331        }
3332    } else {
3333        mPointerController.clear();
3334    }
3335
3336    if (viewportChanged || deviceModeChanged) {
3337        ALOGI("Device reconfigured: id=%d, name='%s', size %dx%d, orientation %d, mode %d, "
3338                "display id %d",
3339                getDeviceId(), getDeviceName().string(), mSurfaceWidth, mSurfaceHeight,
3340                mSurfaceOrientation, mDeviceMode, mViewport.displayId);
3341
3342        // Configure X and Y factors.
3343        mXScale = float(mSurfaceWidth) / rawWidth;
3344        mYScale = float(mSurfaceHeight) / rawHeight;
3345        mXTranslate = -mSurfaceLeft;
3346        mYTranslate = -mSurfaceTop;
3347        mXPrecision = 1.0f / mXScale;
3348        mYPrecision = 1.0f / mYScale;
3349
3350        mOrientedRanges.x.axis = AMOTION_EVENT_AXIS_X;
3351        mOrientedRanges.x.source = mSource;
3352        mOrientedRanges.y.axis = AMOTION_EVENT_AXIS_Y;
3353        mOrientedRanges.y.source = mSource;
3354
3355        configureVirtualKeys();
3356
3357        // Scale factor for terms that are not oriented in a particular axis.
3358        // If the pixels are square then xScale == yScale otherwise we fake it
3359        // by choosing an average.
3360        mGeometricScale = avg(mXScale, mYScale);
3361
3362        // Size of diagonal axis.
3363        float diagonalSize = hypotf(mSurfaceWidth, mSurfaceHeight);
3364
3365        // Size factors.
3366        if (mCalibration.sizeCalibration != Calibration::SIZE_CALIBRATION_NONE) {
3367            if (mRawPointerAxes.touchMajor.valid
3368                    && mRawPointerAxes.touchMajor.maxValue != 0) {
3369                mSizeScale = 1.0f / mRawPointerAxes.touchMajor.maxValue;
3370            } else if (mRawPointerAxes.toolMajor.valid
3371                    && mRawPointerAxes.toolMajor.maxValue != 0) {
3372                mSizeScale = 1.0f / mRawPointerAxes.toolMajor.maxValue;
3373            } else {
3374                mSizeScale = 0.0f;
3375            }
3376
3377            mOrientedRanges.haveTouchSize = true;
3378            mOrientedRanges.haveToolSize = true;
3379            mOrientedRanges.haveSize = true;
3380
3381            mOrientedRanges.touchMajor.axis = AMOTION_EVENT_AXIS_TOUCH_MAJOR;
3382            mOrientedRanges.touchMajor.source = mSource;
3383            mOrientedRanges.touchMajor.min = 0;
3384            mOrientedRanges.touchMajor.max = diagonalSize;
3385            mOrientedRanges.touchMajor.flat = 0;
3386            mOrientedRanges.touchMajor.fuzz = 0;
3387            mOrientedRanges.touchMajor.resolution = 0;
3388
3389            mOrientedRanges.touchMinor = mOrientedRanges.touchMajor;
3390            mOrientedRanges.touchMinor.axis = AMOTION_EVENT_AXIS_TOUCH_MINOR;
3391
3392            mOrientedRanges.toolMajor.axis = AMOTION_EVENT_AXIS_TOOL_MAJOR;
3393            mOrientedRanges.toolMajor.source = mSource;
3394            mOrientedRanges.toolMajor.min = 0;
3395            mOrientedRanges.toolMajor.max = diagonalSize;
3396            mOrientedRanges.toolMajor.flat = 0;
3397            mOrientedRanges.toolMajor.fuzz = 0;
3398            mOrientedRanges.toolMajor.resolution = 0;
3399
3400            mOrientedRanges.toolMinor = mOrientedRanges.toolMajor;
3401            mOrientedRanges.toolMinor.axis = AMOTION_EVENT_AXIS_TOOL_MINOR;
3402
3403            mOrientedRanges.size.axis = AMOTION_EVENT_AXIS_SIZE;
3404            mOrientedRanges.size.source = mSource;
3405            mOrientedRanges.size.min = 0;
3406            mOrientedRanges.size.max = 1.0;
3407            mOrientedRanges.size.flat = 0;
3408            mOrientedRanges.size.fuzz = 0;
3409            mOrientedRanges.size.resolution = 0;
3410        } else {
3411            mSizeScale = 0.0f;
3412        }
3413
3414        // Pressure factors.
3415        mPressureScale = 0;
3416        if (mCalibration.pressureCalibration == Calibration::PRESSURE_CALIBRATION_PHYSICAL
3417                || mCalibration.pressureCalibration
3418                        == Calibration::PRESSURE_CALIBRATION_AMPLITUDE) {
3419            if (mCalibration.havePressureScale) {
3420                mPressureScale = mCalibration.pressureScale;
3421            } else if (mRawPointerAxes.pressure.valid
3422                    && mRawPointerAxes.pressure.maxValue != 0) {
3423                mPressureScale = 1.0f / mRawPointerAxes.pressure.maxValue;
3424            }
3425        }
3426
3427        mOrientedRanges.pressure.axis = AMOTION_EVENT_AXIS_PRESSURE;
3428        mOrientedRanges.pressure.source = mSource;
3429        mOrientedRanges.pressure.min = 0;
3430        mOrientedRanges.pressure.max = 1.0;
3431        mOrientedRanges.pressure.flat = 0;
3432        mOrientedRanges.pressure.fuzz = 0;
3433        mOrientedRanges.pressure.resolution = 0;
3434
3435        // Tilt
3436        mTiltXCenter = 0;
3437        mTiltXScale = 0;
3438        mTiltYCenter = 0;
3439        mTiltYScale = 0;
3440        mHaveTilt = mRawPointerAxes.tiltX.valid && mRawPointerAxes.tiltY.valid;
3441        if (mHaveTilt) {
3442            mTiltXCenter = avg(mRawPointerAxes.tiltX.minValue,
3443                    mRawPointerAxes.tiltX.maxValue);
3444            mTiltYCenter = avg(mRawPointerAxes.tiltY.minValue,
3445                    mRawPointerAxes.tiltY.maxValue);
3446            mTiltXScale = M_PI / 180;
3447            mTiltYScale = M_PI / 180;
3448
3449            mOrientedRanges.haveTilt = true;
3450
3451            mOrientedRanges.tilt.axis = AMOTION_EVENT_AXIS_TILT;
3452            mOrientedRanges.tilt.source = mSource;
3453            mOrientedRanges.tilt.min = 0;
3454            mOrientedRanges.tilt.max = M_PI_2;
3455            mOrientedRanges.tilt.flat = 0;
3456            mOrientedRanges.tilt.fuzz = 0;
3457            mOrientedRanges.tilt.resolution = 0;
3458        }
3459
3460        // Orientation
3461        mOrientationScale = 0;
3462        if (mHaveTilt) {
3463            mOrientedRanges.haveOrientation = true;
3464
3465            mOrientedRanges.orientation.axis = AMOTION_EVENT_AXIS_ORIENTATION;
3466            mOrientedRanges.orientation.source = mSource;
3467            mOrientedRanges.orientation.min = -M_PI;
3468            mOrientedRanges.orientation.max = M_PI;
3469            mOrientedRanges.orientation.flat = 0;
3470            mOrientedRanges.orientation.fuzz = 0;
3471            mOrientedRanges.orientation.resolution = 0;
3472        } else if (mCalibration.orientationCalibration !=
3473                Calibration::ORIENTATION_CALIBRATION_NONE) {
3474            if (mCalibration.orientationCalibration
3475                    == Calibration::ORIENTATION_CALIBRATION_INTERPOLATED) {
3476                if (mRawPointerAxes.orientation.valid) {
3477                    if (mRawPointerAxes.orientation.maxValue > 0) {
3478                        mOrientationScale = M_PI_2 / mRawPointerAxes.orientation.maxValue;
3479                    } else if (mRawPointerAxes.orientation.minValue < 0) {
3480                        mOrientationScale = -M_PI_2 / mRawPointerAxes.orientation.minValue;
3481                    } else {
3482                        mOrientationScale = 0;
3483                    }
3484                }
3485            }
3486
3487            mOrientedRanges.haveOrientation = true;
3488
3489            mOrientedRanges.orientation.axis = AMOTION_EVENT_AXIS_ORIENTATION;
3490            mOrientedRanges.orientation.source = mSource;
3491            mOrientedRanges.orientation.min = -M_PI_2;
3492            mOrientedRanges.orientation.max = M_PI_2;
3493            mOrientedRanges.orientation.flat = 0;
3494            mOrientedRanges.orientation.fuzz = 0;
3495            mOrientedRanges.orientation.resolution = 0;
3496        }
3497
3498        // Distance
3499        mDistanceScale = 0;
3500        if (mCalibration.distanceCalibration != Calibration::DISTANCE_CALIBRATION_NONE) {
3501            if (mCalibration.distanceCalibration
3502                    == Calibration::DISTANCE_CALIBRATION_SCALED) {
3503                if (mCalibration.haveDistanceScale) {
3504                    mDistanceScale = mCalibration.distanceScale;
3505                } else {
3506                    mDistanceScale = 1.0f;
3507                }
3508            }
3509
3510            mOrientedRanges.haveDistance = true;
3511
3512            mOrientedRanges.distance.axis = AMOTION_EVENT_AXIS_DISTANCE;
3513            mOrientedRanges.distance.source = mSource;
3514            mOrientedRanges.distance.min =
3515                    mRawPointerAxes.distance.minValue * mDistanceScale;
3516            mOrientedRanges.distance.max =
3517                    mRawPointerAxes.distance.maxValue * mDistanceScale;
3518            mOrientedRanges.distance.flat = 0;
3519            mOrientedRanges.distance.fuzz =
3520                    mRawPointerAxes.distance.fuzz * mDistanceScale;
3521            mOrientedRanges.distance.resolution = 0;
3522        }
3523
3524        // Compute oriented precision, scales and ranges.
3525        // Note that the maximum value reported is an inclusive maximum value so it is one
3526        // unit less than the total width or height of surface.
3527        switch (mSurfaceOrientation) {
3528        case DISPLAY_ORIENTATION_90:
3529        case DISPLAY_ORIENTATION_270:
3530            mOrientedXPrecision = mYPrecision;
3531            mOrientedYPrecision = mXPrecision;
3532
3533            mOrientedRanges.x.min = mYTranslate;
3534            mOrientedRanges.x.max = mSurfaceHeight + mYTranslate - 1;
3535            mOrientedRanges.x.flat = 0;
3536            mOrientedRanges.x.fuzz = 0;
3537            mOrientedRanges.x.resolution = mRawPointerAxes.y.resolution * mYScale;
3538
3539            mOrientedRanges.y.min = mXTranslate;
3540            mOrientedRanges.y.max = mSurfaceWidth + mXTranslate - 1;
3541            mOrientedRanges.y.flat = 0;
3542            mOrientedRanges.y.fuzz = 0;
3543            mOrientedRanges.y.resolution = mRawPointerAxes.x.resolution * mXScale;
3544            break;
3545
3546        default:
3547            mOrientedXPrecision = mXPrecision;
3548            mOrientedYPrecision = mYPrecision;
3549
3550            mOrientedRanges.x.min = mXTranslate;
3551            mOrientedRanges.x.max = mSurfaceWidth + mXTranslate - 1;
3552            mOrientedRanges.x.flat = 0;
3553            mOrientedRanges.x.fuzz = 0;
3554            mOrientedRanges.x.resolution = mRawPointerAxes.x.resolution * mXScale;
3555
3556            mOrientedRanges.y.min = mYTranslate;
3557            mOrientedRanges.y.max = mSurfaceHeight + mYTranslate - 1;
3558            mOrientedRanges.y.flat = 0;
3559            mOrientedRanges.y.fuzz = 0;
3560            mOrientedRanges.y.resolution = mRawPointerAxes.y.resolution * mYScale;
3561            break;
3562        }
3563
3564        // Location
3565        updateAffineTransformation();
3566
3567        if (mDeviceMode == DEVICE_MODE_POINTER) {
3568            // Compute pointer gesture detection parameters.
3569            float rawDiagonal = hypotf(rawWidth, rawHeight);
3570            float displayDiagonal = hypotf(mSurfaceWidth, mSurfaceHeight);
3571
3572            // Scale movements such that one whole swipe of the touch pad covers a
3573            // given area relative to the diagonal size of the display when no acceleration
3574            // is applied.
3575            // Assume that the touch pad has a square aspect ratio such that movements in
3576            // X and Y of the same number of raw units cover the same physical distance.
3577            mPointerXMovementScale = mConfig.pointerGestureMovementSpeedRatio
3578                    * displayDiagonal / rawDiagonal;
3579            mPointerYMovementScale = mPointerXMovementScale;
3580
3581            // Scale zooms to cover a smaller range of the display than movements do.
3582            // This value determines the area around the pointer that is affected by freeform
3583            // pointer gestures.
3584            mPointerXZoomScale = mConfig.pointerGestureZoomSpeedRatio
3585                    * displayDiagonal / rawDiagonal;
3586            mPointerYZoomScale = mPointerXZoomScale;
3587
3588            // Max width between pointers to detect a swipe gesture is more than some fraction
3589            // of the diagonal axis of the touch pad.  Touches that are wider than this are
3590            // translated into freeform gestures.
3591            mPointerGestureMaxSwipeWidth =
3592                    mConfig.pointerGestureSwipeMaxWidthRatio * rawDiagonal;
3593
3594            // Abort current pointer usages because the state has changed.
3595            abortPointerUsage(when, 0 /*policyFlags*/);
3596        }
3597
3598        // Inform the dispatcher about the changes.
3599        *outResetNeeded = true;
3600        bumpGeneration();
3601    }
3602}
3603
3604void TouchInputMapper::dumpSurface(String8& dump) {
3605    dump.appendFormat(INDENT3 "Viewport: displayId=%d, orientation=%d, "
3606            "logicalFrame=[%d, %d, %d, %d], "
3607            "physicalFrame=[%d, %d, %d, %d], "
3608            "deviceSize=[%d, %d]\n",
3609            mViewport.displayId, mViewport.orientation,
3610            mViewport.logicalLeft, mViewport.logicalTop,
3611            mViewport.logicalRight, mViewport.logicalBottom,
3612            mViewport.physicalLeft, mViewport.physicalTop,
3613            mViewport.physicalRight, mViewport.physicalBottom,
3614            mViewport.deviceWidth, mViewport.deviceHeight);
3615
3616    dump.appendFormat(INDENT3 "SurfaceWidth: %dpx\n", mSurfaceWidth);
3617    dump.appendFormat(INDENT3 "SurfaceHeight: %dpx\n", mSurfaceHeight);
3618    dump.appendFormat(INDENT3 "SurfaceLeft: %d\n", mSurfaceLeft);
3619    dump.appendFormat(INDENT3 "SurfaceTop: %d\n", mSurfaceTop);
3620    dump.appendFormat(INDENT3 "SurfaceOrientation: %d\n", mSurfaceOrientation);
3621}
3622
3623void TouchInputMapper::configureVirtualKeys() {
3624    Vector<VirtualKeyDefinition> virtualKeyDefinitions;
3625    getEventHub()->getVirtualKeyDefinitions(getDeviceId(), virtualKeyDefinitions);
3626
3627    mVirtualKeys.clear();
3628
3629    if (virtualKeyDefinitions.size() == 0) {
3630        return;
3631    }
3632
3633    mVirtualKeys.setCapacity(virtualKeyDefinitions.size());
3634
3635    int32_t touchScreenLeft = mRawPointerAxes.x.minValue;
3636    int32_t touchScreenTop = mRawPointerAxes.y.minValue;
3637    int32_t touchScreenWidth = mRawPointerAxes.x.maxValue - mRawPointerAxes.x.minValue + 1;
3638    int32_t touchScreenHeight = mRawPointerAxes.y.maxValue - mRawPointerAxes.y.minValue + 1;
3639
3640    for (size_t i = 0; i < virtualKeyDefinitions.size(); i++) {
3641        const VirtualKeyDefinition& virtualKeyDefinition =
3642                virtualKeyDefinitions[i];
3643
3644        mVirtualKeys.add();
3645        VirtualKey& virtualKey = mVirtualKeys.editTop();
3646
3647        virtualKey.scanCode = virtualKeyDefinition.scanCode;
3648        int32_t keyCode;
3649        int32_t dummyKeyMetaState;
3650        uint32_t flags;
3651        if (getEventHub()->mapKey(getDeviceId(), virtualKey.scanCode, 0, 0,
3652                                  &keyCode, &dummyKeyMetaState, &flags)) {
3653            ALOGW(INDENT "VirtualKey %d: could not obtain key code, ignoring",
3654                    virtualKey.scanCode);
3655            mVirtualKeys.pop(); // drop the key
3656            continue;
3657        }
3658
3659        virtualKey.keyCode = keyCode;
3660        virtualKey.flags = flags;
3661
3662        // convert the key definition's display coordinates into touch coordinates for a hit box
3663        int32_t halfWidth = virtualKeyDefinition.width / 2;
3664        int32_t halfHeight = virtualKeyDefinition.height / 2;
3665
3666        virtualKey.hitLeft = (virtualKeyDefinition.centerX - halfWidth)
3667                * touchScreenWidth / mSurfaceWidth + touchScreenLeft;
3668        virtualKey.hitRight= (virtualKeyDefinition.centerX + halfWidth)
3669                * touchScreenWidth / mSurfaceWidth + touchScreenLeft;
3670        virtualKey.hitTop = (virtualKeyDefinition.centerY - halfHeight)
3671                * touchScreenHeight / mSurfaceHeight + touchScreenTop;
3672        virtualKey.hitBottom = (virtualKeyDefinition.centerY + halfHeight)
3673                * touchScreenHeight / mSurfaceHeight + touchScreenTop;
3674    }
3675}
3676
3677void TouchInputMapper::dumpVirtualKeys(String8& dump) {
3678    if (!mVirtualKeys.isEmpty()) {
3679        dump.append(INDENT3 "Virtual Keys:\n");
3680
3681        for (size_t i = 0; i < mVirtualKeys.size(); i++) {
3682            const VirtualKey& virtualKey = mVirtualKeys.itemAt(i);
3683            dump.appendFormat(INDENT4 "%zu: scanCode=%d, keyCode=%d, "
3684                    "hitLeft=%d, hitRight=%d, hitTop=%d, hitBottom=%d\n",
3685                    i, virtualKey.scanCode, virtualKey.keyCode,
3686                    virtualKey.hitLeft, virtualKey.hitRight,
3687                    virtualKey.hitTop, virtualKey.hitBottom);
3688        }
3689    }
3690}
3691
3692void TouchInputMapper::parseCalibration() {
3693    const PropertyMap& in = getDevice()->getConfiguration();
3694    Calibration& out = mCalibration;
3695
3696    // Size
3697    out.sizeCalibration = Calibration::SIZE_CALIBRATION_DEFAULT;
3698    String8 sizeCalibrationString;
3699    if (in.tryGetProperty(String8("touch.size.calibration"), sizeCalibrationString)) {
3700        if (sizeCalibrationString == "none") {
3701            out.sizeCalibration = Calibration::SIZE_CALIBRATION_NONE;
3702        } else if (sizeCalibrationString == "geometric") {
3703            out.sizeCalibration = Calibration::SIZE_CALIBRATION_GEOMETRIC;
3704        } else if (sizeCalibrationString == "diameter") {
3705            out.sizeCalibration = Calibration::SIZE_CALIBRATION_DIAMETER;
3706        } else if (sizeCalibrationString == "box") {
3707            out.sizeCalibration = Calibration::SIZE_CALIBRATION_BOX;
3708        } else if (sizeCalibrationString == "area") {
3709            out.sizeCalibration = Calibration::SIZE_CALIBRATION_AREA;
3710        } else if (sizeCalibrationString != "default") {
3711            ALOGW("Invalid value for touch.size.calibration: '%s'",
3712                    sizeCalibrationString.string());
3713        }
3714    }
3715
3716    out.haveSizeScale = in.tryGetProperty(String8("touch.size.scale"),
3717            out.sizeScale);
3718    out.haveSizeBias = in.tryGetProperty(String8("touch.size.bias"),
3719            out.sizeBias);
3720    out.haveSizeIsSummed = in.tryGetProperty(String8("touch.size.isSummed"),
3721            out.sizeIsSummed);
3722
3723    // Pressure
3724    out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_DEFAULT;
3725    String8 pressureCalibrationString;
3726    if (in.tryGetProperty(String8("touch.pressure.calibration"), pressureCalibrationString)) {
3727        if (pressureCalibrationString == "none") {
3728            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_NONE;
3729        } else if (pressureCalibrationString == "physical") {
3730            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_PHYSICAL;
3731        } else if (pressureCalibrationString == "amplitude") {
3732            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_AMPLITUDE;
3733        } else if (pressureCalibrationString != "default") {
3734            ALOGW("Invalid value for touch.pressure.calibration: '%s'",
3735                    pressureCalibrationString.string());
3736        }
3737    }
3738
3739    out.havePressureScale = in.tryGetProperty(String8("touch.pressure.scale"),
3740            out.pressureScale);
3741
3742    // Orientation
3743    out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_DEFAULT;
3744    String8 orientationCalibrationString;
3745    if (in.tryGetProperty(String8("touch.orientation.calibration"), orientationCalibrationString)) {
3746        if (orientationCalibrationString == "none") {
3747            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
3748        } else if (orientationCalibrationString == "interpolated") {
3749            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
3750        } else if (orientationCalibrationString == "vector") {
3751            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_VECTOR;
3752        } else if (orientationCalibrationString != "default") {
3753            ALOGW("Invalid value for touch.orientation.calibration: '%s'",
3754                    orientationCalibrationString.string());
3755        }
3756    }
3757
3758    // Distance
3759    out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_DEFAULT;
3760    String8 distanceCalibrationString;
3761    if (in.tryGetProperty(String8("touch.distance.calibration"), distanceCalibrationString)) {
3762        if (distanceCalibrationString == "none") {
3763            out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_NONE;
3764        } else if (distanceCalibrationString == "scaled") {
3765            out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_SCALED;
3766        } else if (distanceCalibrationString != "default") {
3767            ALOGW("Invalid value for touch.distance.calibration: '%s'",
3768                    distanceCalibrationString.string());
3769        }
3770    }
3771
3772    out.haveDistanceScale = in.tryGetProperty(String8("touch.distance.scale"),
3773            out.distanceScale);
3774
3775    out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_DEFAULT;
3776    String8 coverageCalibrationString;
3777    if (in.tryGetProperty(String8("touch.coverage.calibration"), coverageCalibrationString)) {
3778        if (coverageCalibrationString == "none") {
3779            out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_NONE;
3780        } else if (coverageCalibrationString == "box") {
3781            out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_BOX;
3782        } else if (coverageCalibrationString != "default") {
3783            ALOGW("Invalid value for touch.coverage.calibration: '%s'",
3784                    coverageCalibrationString.string());
3785        }
3786    }
3787}
3788
3789void TouchInputMapper::resolveCalibration() {
3790    // Size
3791    if (mRawPointerAxes.touchMajor.valid || mRawPointerAxes.toolMajor.valid) {
3792        if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_DEFAULT) {
3793            mCalibration.sizeCalibration = Calibration::SIZE_CALIBRATION_GEOMETRIC;
3794        }
3795    } else {
3796        mCalibration.sizeCalibration = Calibration::SIZE_CALIBRATION_NONE;
3797    }
3798
3799    // Pressure
3800    if (mRawPointerAxes.pressure.valid) {
3801        if (mCalibration.pressureCalibration == Calibration::PRESSURE_CALIBRATION_DEFAULT) {
3802            mCalibration.pressureCalibration = Calibration::PRESSURE_CALIBRATION_PHYSICAL;
3803        }
3804    } else {
3805        mCalibration.pressureCalibration = Calibration::PRESSURE_CALIBRATION_NONE;
3806    }
3807
3808    // Orientation
3809    if (mRawPointerAxes.orientation.valid) {
3810        if (mCalibration.orientationCalibration == Calibration::ORIENTATION_CALIBRATION_DEFAULT) {
3811            mCalibration.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
3812        }
3813    } else {
3814        mCalibration.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
3815    }
3816
3817    // Distance
3818    if (mRawPointerAxes.distance.valid) {
3819        if (mCalibration.distanceCalibration == Calibration::DISTANCE_CALIBRATION_DEFAULT) {
3820            mCalibration.distanceCalibration = Calibration::DISTANCE_CALIBRATION_SCALED;
3821        }
3822    } else {
3823        mCalibration.distanceCalibration = Calibration::DISTANCE_CALIBRATION_NONE;
3824    }
3825
3826    // Coverage
3827    if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_DEFAULT) {
3828        mCalibration.coverageCalibration = Calibration::COVERAGE_CALIBRATION_NONE;
3829    }
3830}
3831
3832void TouchInputMapper::dumpCalibration(String8& dump) {
3833    dump.append(INDENT3 "Calibration:\n");
3834
3835    // Size
3836    switch (mCalibration.sizeCalibration) {
3837    case Calibration::SIZE_CALIBRATION_NONE:
3838        dump.append(INDENT4 "touch.size.calibration: none\n");
3839        break;
3840    case Calibration::SIZE_CALIBRATION_GEOMETRIC:
3841        dump.append(INDENT4 "touch.size.calibration: geometric\n");
3842        break;
3843    case Calibration::SIZE_CALIBRATION_DIAMETER:
3844        dump.append(INDENT4 "touch.size.calibration: diameter\n");
3845        break;
3846    case Calibration::SIZE_CALIBRATION_BOX:
3847        dump.append(INDENT4 "touch.size.calibration: box\n");
3848        break;
3849    case Calibration::SIZE_CALIBRATION_AREA:
3850        dump.append(INDENT4 "touch.size.calibration: area\n");
3851        break;
3852    default:
3853        ALOG_ASSERT(false);
3854    }
3855
3856    if (mCalibration.haveSizeScale) {
3857        dump.appendFormat(INDENT4 "touch.size.scale: %0.3f\n",
3858                mCalibration.sizeScale);
3859    }
3860
3861    if (mCalibration.haveSizeBias) {
3862        dump.appendFormat(INDENT4 "touch.size.bias: %0.3f\n",
3863                mCalibration.sizeBias);
3864    }
3865
3866    if (mCalibration.haveSizeIsSummed) {
3867        dump.appendFormat(INDENT4 "touch.size.isSummed: %s\n",
3868                toString(mCalibration.sizeIsSummed));
3869    }
3870
3871    // Pressure
3872    switch (mCalibration.pressureCalibration) {
3873    case Calibration::PRESSURE_CALIBRATION_NONE:
3874        dump.append(INDENT4 "touch.pressure.calibration: none\n");
3875        break;
3876    case Calibration::PRESSURE_CALIBRATION_PHYSICAL:
3877        dump.append(INDENT4 "touch.pressure.calibration: physical\n");
3878        break;
3879    case Calibration::PRESSURE_CALIBRATION_AMPLITUDE:
3880        dump.append(INDENT4 "touch.pressure.calibration: amplitude\n");
3881        break;
3882    default:
3883        ALOG_ASSERT(false);
3884    }
3885
3886    if (mCalibration.havePressureScale) {
3887        dump.appendFormat(INDENT4 "touch.pressure.scale: %0.3f\n",
3888                mCalibration.pressureScale);
3889    }
3890
3891    // Orientation
3892    switch (mCalibration.orientationCalibration) {
3893    case Calibration::ORIENTATION_CALIBRATION_NONE:
3894        dump.append(INDENT4 "touch.orientation.calibration: none\n");
3895        break;
3896    case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
3897        dump.append(INDENT4 "touch.orientation.calibration: interpolated\n");
3898        break;
3899    case Calibration::ORIENTATION_CALIBRATION_VECTOR:
3900        dump.append(INDENT4 "touch.orientation.calibration: vector\n");
3901        break;
3902    default:
3903        ALOG_ASSERT(false);
3904    }
3905
3906    // Distance
3907    switch (mCalibration.distanceCalibration) {
3908    case Calibration::DISTANCE_CALIBRATION_NONE:
3909        dump.append(INDENT4 "touch.distance.calibration: none\n");
3910        break;
3911    case Calibration::DISTANCE_CALIBRATION_SCALED:
3912        dump.append(INDENT4 "touch.distance.calibration: scaled\n");
3913        break;
3914    default:
3915        ALOG_ASSERT(false);
3916    }
3917
3918    if (mCalibration.haveDistanceScale) {
3919        dump.appendFormat(INDENT4 "touch.distance.scale: %0.3f\n",
3920                mCalibration.distanceScale);
3921    }
3922
3923    switch (mCalibration.coverageCalibration) {
3924    case Calibration::COVERAGE_CALIBRATION_NONE:
3925        dump.append(INDENT4 "touch.coverage.calibration: none\n");
3926        break;
3927    case Calibration::COVERAGE_CALIBRATION_BOX:
3928        dump.append(INDENT4 "touch.coverage.calibration: box\n");
3929        break;
3930    default:
3931        ALOG_ASSERT(false);
3932    }
3933}
3934
3935void TouchInputMapper::dumpAffineTransformation(String8& dump) {
3936    dump.append(INDENT3 "Affine Transformation:\n");
3937
3938    dump.appendFormat(INDENT4 "X scale: %0.3f\n", mAffineTransform.x_scale);
3939    dump.appendFormat(INDENT4 "X ymix: %0.3f\n", mAffineTransform.x_ymix);
3940    dump.appendFormat(INDENT4 "X offset: %0.3f\n", mAffineTransform.x_offset);
3941    dump.appendFormat(INDENT4 "Y xmix: %0.3f\n", mAffineTransform.y_xmix);
3942    dump.appendFormat(INDENT4 "Y scale: %0.3f\n", mAffineTransform.y_scale);
3943    dump.appendFormat(INDENT4 "Y offset: %0.3f\n", mAffineTransform.y_offset);
3944}
3945
3946void TouchInputMapper::updateAffineTransformation() {
3947    mAffineTransform = getPolicy()->getTouchAffineTransformation(mDevice->getDescriptor(),
3948            mSurfaceOrientation);
3949}
3950
3951void TouchInputMapper::reset(nsecs_t when) {
3952    mCursorButtonAccumulator.reset(getDevice());
3953    mCursorScrollAccumulator.reset(getDevice());
3954    mTouchButtonAccumulator.reset(getDevice());
3955
3956    mPointerVelocityControl.reset();
3957    mWheelXVelocityControl.reset();
3958    mWheelYVelocityControl.reset();
3959
3960    mRawStatesPending.clear();
3961    mCurrentRawState.clear();
3962    mCurrentCookedState.clear();
3963    mLastRawState.clear();
3964    mLastCookedState.clear();
3965    mPointerUsage = POINTER_USAGE_NONE;
3966    mSentHoverEnter = false;
3967    mHavePointerIds = false;
3968    mCurrentMotionAborted = false;
3969    mDownTime = 0;
3970
3971    mCurrentVirtualKey.down = false;
3972
3973    mPointerGesture.reset();
3974    mPointerSimple.reset();
3975    resetExternalStylus();
3976
3977    if (mPointerController != NULL) {
3978        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
3979        mPointerController->clearSpots();
3980    }
3981
3982    InputMapper::reset(when);
3983}
3984
3985void TouchInputMapper::resetExternalStylus() {
3986    mExternalStylusState.clear();
3987    mExternalStylusId = -1;
3988    mExternalStylusFusionTimeout = LLONG_MAX;
3989    mExternalStylusDataPending = false;
3990}
3991
3992void TouchInputMapper::clearStylusDataPendingFlags() {
3993    mExternalStylusDataPending = false;
3994    mExternalStylusFusionTimeout = LLONG_MAX;
3995}
3996
3997void TouchInputMapper::process(const RawEvent* rawEvent) {
3998    mCursorButtonAccumulator.process(rawEvent);
3999    mCursorScrollAccumulator.process(rawEvent);
4000    mTouchButtonAccumulator.process(rawEvent);
4001
4002    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
4003        sync(rawEvent->when);
4004    }
4005}
4006
4007void TouchInputMapper::sync(nsecs_t when) {
4008    const RawState* last = mRawStatesPending.isEmpty() ?
4009            &mCurrentRawState : &mRawStatesPending.top();
4010
4011    // Push a new state.
4012    mRawStatesPending.push();
4013    RawState* next = &mRawStatesPending.editTop();
4014    next->clear();
4015    next->when = when;
4016
4017    // Sync button state.
4018    next->buttonState = mTouchButtonAccumulator.getButtonState()
4019            | mCursorButtonAccumulator.getButtonState();
4020
4021    // Sync scroll
4022    next->rawVScroll = mCursorScrollAccumulator.getRelativeVWheel();
4023    next->rawHScroll = mCursorScrollAccumulator.getRelativeHWheel();
4024    mCursorScrollAccumulator.finishSync();
4025
4026    // Sync touch
4027    syncTouch(when, next);
4028
4029    // Assign pointer ids.
4030    if (!mHavePointerIds) {
4031        assignPointerIds(last, next);
4032    }
4033
4034#if DEBUG_RAW_EVENTS
4035    ALOGD("syncTouch: pointerCount %d -> %d, touching ids 0x%08x -> 0x%08x, "
4036            "hovering ids 0x%08x -> 0x%08x",
4037            last->rawPointerData.pointerCount,
4038            next->rawPointerData.pointerCount,
4039            last->rawPointerData.touchingIdBits.value,
4040            next->rawPointerData.touchingIdBits.value,
4041            last->rawPointerData.hoveringIdBits.value,
4042            next->rawPointerData.hoveringIdBits.value);
4043#endif
4044
4045    processRawTouches(false /*timeout*/);
4046}
4047
4048void TouchInputMapper::processRawTouches(bool timeout) {
4049    if (mDeviceMode == DEVICE_MODE_DISABLED) {
4050        // Drop all input if the device is disabled.
4051        mCurrentRawState.clear();
4052        mRawStatesPending.clear();
4053        return;
4054    }
4055
4056    // Drain any pending touch states. The invariant here is that the mCurrentRawState is always
4057    // valid and must go through the full cook and dispatch cycle. This ensures that anything
4058    // touching the current state will only observe the events that have been dispatched to the
4059    // rest of the pipeline.
4060    const size_t N = mRawStatesPending.size();
4061    size_t count;
4062    for(count = 0; count < N; count++) {
4063        const RawState& next = mRawStatesPending[count];
4064
4065        // A failure to assign the stylus id means that we're waiting on stylus data
4066        // and so should defer the rest of the pipeline.
4067        if (assignExternalStylusId(next, timeout)) {
4068            break;
4069        }
4070
4071        // All ready to go.
4072        clearStylusDataPendingFlags();
4073        mCurrentRawState.copyFrom(next);
4074        if (mCurrentRawState.when < mLastRawState.when) {
4075            mCurrentRawState.when = mLastRawState.when;
4076        }
4077        cookAndDispatch(mCurrentRawState.when);
4078    }
4079    if (count != 0) {
4080        mRawStatesPending.removeItemsAt(0, count);
4081    }
4082
4083    if (mExternalStylusDataPending) {
4084        if (timeout) {
4085            nsecs_t when = mExternalStylusFusionTimeout - STYLUS_DATA_LATENCY;
4086            clearStylusDataPendingFlags();
4087            mCurrentRawState.copyFrom(mLastRawState);
4088#if DEBUG_STYLUS_FUSION
4089            ALOGD("Timeout expired, synthesizing event with new stylus data");
4090#endif
4091            cookAndDispatch(when);
4092        } else if (mExternalStylusFusionTimeout == LLONG_MAX) {
4093            mExternalStylusFusionTimeout = mExternalStylusState.when + TOUCH_DATA_TIMEOUT;
4094            getContext()->requestTimeoutAtTime(mExternalStylusFusionTimeout);
4095        }
4096    }
4097}
4098
4099void TouchInputMapper::cookAndDispatch(nsecs_t when) {
4100    // Always start with a clean state.
4101    mCurrentCookedState.clear();
4102
4103    // Apply stylus buttons to current raw state.
4104    applyExternalStylusButtonState(when);
4105
4106    // Handle policy on initial down or hover events.
4107    bool initialDown = mLastRawState.rawPointerData.pointerCount == 0
4108            && mCurrentRawState.rawPointerData.pointerCount != 0;
4109
4110    uint32_t policyFlags = 0;
4111    bool buttonsPressed = mCurrentRawState.buttonState & ~mLastRawState.buttonState;
4112    if (initialDown || buttonsPressed) {
4113        // If this is a touch screen, hide the pointer on an initial down.
4114        if (mDeviceMode == DEVICE_MODE_DIRECT) {
4115            getContext()->fadePointer();
4116        }
4117
4118        if (mParameters.wake) {
4119            policyFlags |= POLICY_FLAG_WAKE;
4120        }
4121    }
4122
4123    // Consume raw off-screen touches before cooking pointer data.
4124    // If touches are consumed, subsequent code will not receive any pointer data.
4125    if (consumeRawTouches(when, policyFlags)) {
4126        mCurrentRawState.rawPointerData.clear();
4127    }
4128
4129    // Cook pointer data.  This call populates the mCurrentCookedState.cookedPointerData structure
4130    // with cooked pointer data that has the same ids and indices as the raw data.
4131    // The following code can use either the raw or cooked data, as needed.
4132    cookPointerData();
4133
4134    // Apply stylus pressure to current cooked state.
4135    applyExternalStylusTouchState(when);
4136
4137    // Synthesize key down from raw buttons if needed.
4138    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
4139            policyFlags, mLastCookedState.buttonState, mCurrentCookedState.buttonState);
4140
4141    // Dispatch the touches either directly or by translation through a pointer on screen.
4142    if (mDeviceMode == DEVICE_MODE_POINTER) {
4143        for (BitSet32 idBits(mCurrentRawState.rawPointerData.touchingIdBits);
4144                !idBits.isEmpty(); ) {
4145            uint32_t id = idBits.clearFirstMarkedBit();
4146            const RawPointerData::Pointer& pointer =
4147                    mCurrentRawState.rawPointerData.pointerForId(id);
4148            if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_STYLUS
4149                    || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_ERASER) {
4150                mCurrentCookedState.stylusIdBits.markBit(id);
4151            } else if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_FINGER
4152                    || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
4153                mCurrentCookedState.fingerIdBits.markBit(id);
4154            } else if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_MOUSE) {
4155                mCurrentCookedState.mouseIdBits.markBit(id);
4156            }
4157        }
4158        for (BitSet32 idBits(mCurrentRawState.rawPointerData.hoveringIdBits);
4159                !idBits.isEmpty(); ) {
4160            uint32_t id = idBits.clearFirstMarkedBit();
4161            const RawPointerData::Pointer& pointer =
4162                    mCurrentRawState.rawPointerData.pointerForId(id);
4163            if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_STYLUS
4164                    || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_ERASER) {
4165                mCurrentCookedState.stylusIdBits.markBit(id);
4166            }
4167        }
4168
4169        // Stylus takes precedence over all tools, then mouse, then finger.
4170        PointerUsage pointerUsage = mPointerUsage;
4171        if (!mCurrentCookedState.stylusIdBits.isEmpty()) {
4172            mCurrentCookedState.mouseIdBits.clear();
4173            mCurrentCookedState.fingerIdBits.clear();
4174            pointerUsage = POINTER_USAGE_STYLUS;
4175        } else if (!mCurrentCookedState.mouseIdBits.isEmpty()) {
4176            mCurrentCookedState.fingerIdBits.clear();
4177            pointerUsage = POINTER_USAGE_MOUSE;
4178        } else if (!mCurrentCookedState.fingerIdBits.isEmpty() ||
4179                isPointerDown(mCurrentRawState.buttonState)) {
4180            pointerUsage = POINTER_USAGE_GESTURES;
4181        }
4182
4183        dispatchPointerUsage(when, policyFlags, pointerUsage);
4184    } else {
4185        if (mDeviceMode == DEVICE_MODE_DIRECT
4186                && mConfig.showTouches && mPointerController != NULL) {
4187            mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_SPOT);
4188            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
4189
4190            mPointerController->setButtonState(mCurrentRawState.buttonState);
4191            mPointerController->setSpots(mCurrentCookedState.cookedPointerData.pointerCoords,
4192                    mCurrentCookedState.cookedPointerData.idToIndex,
4193                    mCurrentCookedState.cookedPointerData.touchingIdBits);
4194        }
4195
4196        if (!mCurrentMotionAborted) {
4197            dispatchButtonRelease(when, policyFlags);
4198            dispatchHoverExit(when, policyFlags);
4199            dispatchTouches(when, policyFlags);
4200            dispatchHoverEnterAndMove(when, policyFlags);
4201            dispatchButtonPress(when, policyFlags);
4202        }
4203
4204        if (mCurrentCookedState.cookedPointerData.pointerCount == 0) {
4205            mCurrentMotionAborted = false;
4206        }
4207    }
4208
4209    // Synthesize key up from raw buttons if needed.
4210    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
4211            policyFlags, mLastCookedState.buttonState, mCurrentCookedState.buttonState);
4212
4213    // Clear some transient state.
4214    mCurrentRawState.rawVScroll = 0;
4215    mCurrentRawState.rawHScroll = 0;
4216
4217    // Copy current touch to last touch in preparation for the next cycle.
4218    mLastRawState.copyFrom(mCurrentRawState);
4219    mLastCookedState.copyFrom(mCurrentCookedState);
4220}
4221
4222void TouchInputMapper::applyExternalStylusButtonState(nsecs_t when) {
4223    if (mDeviceMode == DEVICE_MODE_DIRECT && hasExternalStylus() && mExternalStylusId != -1) {
4224        mCurrentRawState.buttonState |= mExternalStylusState.buttons;
4225    }
4226}
4227
4228void TouchInputMapper::applyExternalStylusTouchState(nsecs_t when) {
4229    CookedPointerData& currentPointerData = mCurrentCookedState.cookedPointerData;
4230    const CookedPointerData& lastPointerData = mLastCookedState.cookedPointerData;
4231
4232    if (mExternalStylusId != -1 && currentPointerData.isTouching(mExternalStylusId)) {
4233        float pressure = mExternalStylusState.pressure;
4234        if (pressure == 0.0f && lastPointerData.isTouching(mExternalStylusId)) {
4235            const PointerCoords& coords = lastPointerData.pointerCoordsForId(mExternalStylusId);
4236            pressure = coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE);
4237        }
4238        PointerCoords& coords = currentPointerData.editPointerCoordsWithId(mExternalStylusId);
4239        coords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, pressure);
4240
4241        PointerProperties& properties =
4242                currentPointerData.editPointerPropertiesWithId(mExternalStylusId);
4243        if (mExternalStylusState.toolType != AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
4244            properties.toolType = mExternalStylusState.toolType;
4245        }
4246    }
4247}
4248
4249bool TouchInputMapper::assignExternalStylusId(const RawState& state, bool timeout) {
4250    if (mDeviceMode != DEVICE_MODE_DIRECT || !hasExternalStylus()) {
4251        return false;
4252    }
4253
4254    const bool initialDown = mLastRawState.rawPointerData.pointerCount == 0
4255            && state.rawPointerData.pointerCount != 0;
4256    if (initialDown) {
4257        if (mExternalStylusState.pressure != 0.0f) {
4258#if DEBUG_STYLUS_FUSION
4259            ALOGD("Have both stylus and touch data, beginning fusion");
4260#endif
4261            mExternalStylusId = state.rawPointerData.touchingIdBits.firstMarkedBit();
4262        } else if (timeout) {
4263#if DEBUG_STYLUS_FUSION
4264            ALOGD("Timeout expired, assuming touch is not a stylus.");
4265#endif
4266            resetExternalStylus();
4267        } else {
4268            if (mExternalStylusFusionTimeout == LLONG_MAX) {
4269                mExternalStylusFusionTimeout = state.when + EXTERNAL_STYLUS_DATA_TIMEOUT;
4270            }
4271#if DEBUG_STYLUS_FUSION
4272            ALOGD("No stylus data but stylus is connected, requesting timeout "
4273                    "(%" PRId64 "ms)", mExternalStylusFusionTimeout);
4274#endif
4275            getContext()->requestTimeoutAtTime(mExternalStylusFusionTimeout);
4276            return true;
4277        }
4278    }
4279
4280    // Check if the stylus pointer has gone up.
4281    if (mExternalStylusId != -1 &&
4282            !state.rawPointerData.touchingIdBits.hasBit(mExternalStylusId)) {
4283#if DEBUG_STYLUS_FUSION
4284            ALOGD("Stylus pointer is going up");
4285#endif
4286        mExternalStylusId = -1;
4287    }
4288
4289    return false;
4290}
4291
4292void TouchInputMapper::timeoutExpired(nsecs_t when) {
4293    if (mDeviceMode == DEVICE_MODE_POINTER) {
4294        if (mPointerUsage == POINTER_USAGE_GESTURES) {
4295            dispatchPointerGestures(when, 0 /*policyFlags*/, true /*isTimeout*/);
4296        }
4297    } else if (mDeviceMode == DEVICE_MODE_DIRECT) {
4298        if (mExternalStylusFusionTimeout < when) {
4299            processRawTouches(true /*timeout*/);
4300        } else if (mExternalStylusFusionTimeout != LLONG_MAX) {
4301            getContext()->requestTimeoutAtTime(mExternalStylusFusionTimeout);
4302        }
4303    }
4304}
4305
4306void TouchInputMapper::updateExternalStylusState(const StylusState& state) {
4307    mExternalStylusState.copyFrom(state);
4308    if (mExternalStylusId != -1 || mExternalStylusFusionTimeout != LLONG_MAX) {
4309        // We're either in the middle of a fused stream of data or we're waiting on data before
4310        // dispatching the initial down, so go ahead and dispatch now that we have fresh stylus
4311        // data.
4312        mExternalStylusDataPending = true;
4313        processRawTouches(false /*timeout*/);
4314    }
4315}
4316
4317bool TouchInputMapper::consumeRawTouches(nsecs_t when, uint32_t policyFlags) {
4318    // Check for release of a virtual key.
4319    if (mCurrentVirtualKey.down) {
4320        if (mCurrentRawState.rawPointerData.touchingIdBits.isEmpty()) {
4321            // Pointer went up while virtual key was down.
4322            mCurrentVirtualKey.down = false;
4323            if (!mCurrentVirtualKey.ignored) {
4324#if DEBUG_VIRTUAL_KEYS
4325                ALOGD("VirtualKeys: Generating key up: keyCode=%d, scanCode=%d",
4326                        mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
4327#endif
4328                dispatchVirtualKey(when, policyFlags,
4329                        AKEY_EVENT_ACTION_UP,
4330                        AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
4331            }
4332            return true;
4333        }
4334
4335        if (mCurrentRawState.rawPointerData.touchingIdBits.count() == 1) {
4336            uint32_t id = mCurrentRawState.rawPointerData.touchingIdBits.firstMarkedBit();
4337            const RawPointerData::Pointer& pointer =
4338                    mCurrentRawState.rawPointerData.pointerForId(id);
4339            const VirtualKey* virtualKey = findVirtualKeyHit(pointer.x, pointer.y);
4340            if (virtualKey && virtualKey->keyCode == mCurrentVirtualKey.keyCode) {
4341                // Pointer is still within the space of the virtual key.
4342                return true;
4343            }
4344        }
4345
4346        // Pointer left virtual key area or another pointer also went down.
4347        // Send key cancellation but do not consume the touch yet.
4348        // This is useful when the user swipes through from the virtual key area
4349        // into the main display surface.
4350        mCurrentVirtualKey.down = false;
4351        if (!mCurrentVirtualKey.ignored) {
4352#if DEBUG_VIRTUAL_KEYS
4353            ALOGD("VirtualKeys: Canceling key: keyCode=%d, scanCode=%d",
4354                    mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
4355#endif
4356            dispatchVirtualKey(when, policyFlags,
4357                    AKEY_EVENT_ACTION_UP,
4358                    AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY
4359                            | AKEY_EVENT_FLAG_CANCELED);
4360        }
4361    }
4362
4363    if (mLastRawState.rawPointerData.touchingIdBits.isEmpty()
4364            && !mCurrentRawState.rawPointerData.touchingIdBits.isEmpty()) {
4365        // Pointer just went down.  Check for virtual key press or off-screen touches.
4366        uint32_t id = mCurrentRawState.rawPointerData.touchingIdBits.firstMarkedBit();
4367        const RawPointerData::Pointer& pointer = mCurrentRawState.rawPointerData.pointerForId(id);
4368        if (!isPointInsideSurface(pointer.x, pointer.y)) {
4369            // If exactly one pointer went down, check for virtual key hit.
4370            // Otherwise we will drop the entire stroke.
4371            if (mCurrentRawState.rawPointerData.touchingIdBits.count() == 1) {
4372                const VirtualKey* virtualKey = findVirtualKeyHit(pointer.x, pointer.y);
4373                if (virtualKey) {
4374                    mCurrentVirtualKey.down = true;
4375                    mCurrentVirtualKey.downTime = when;
4376                    mCurrentVirtualKey.keyCode = virtualKey->keyCode;
4377                    mCurrentVirtualKey.scanCode = virtualKey->scanCode;
4378                    mCurrentVirtualKey.ignored = mContext->shouldDropVirtualKey(
4379                            when, getDevice(), virtualKey->keyCode, virtualKey->scanCode);
4380
4381                    if (!mCurrentVirtualKey.ignored) {
4382#if DEBUG_VIRTUAL_KEYS
4383                        ALOGD("VirtualKeys: Generating key down: keyCode=%d, scanCode=%d",
4384                                mCurrentVirtualKey.keyCode,
4385                                mCurrentVirtualKey.scanCode);
4386#endif
4387                        dispatchVirtualKey(when, policyFlags,
4388                                AKEY_EVENT_ACTION_DOWN,
4389                                AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
4390                    }
4391                }
4392            }
4393            return true;
4394        }
4395    }
4396
4397    // Disable all virtual key touches that happen within a short time interval of the
4398    // most recent touch within the screen area.  The idea is to filter out stray
4399    // virtual key presses when interacting with the touch screen.
4400    //
4401    // Problems we're trying to solve:
4402    //
4403    // 1. While scrolling a list or dragging the window shade, the user swipes down into a
4404    //    virtual key area that is implemented by a separate touch panel and accidentally
4405    //    triggers a virtual key.
4406    //
4407    // 2. While typing in the on screen keyboard, the user taps slightly outside the screen
4408    //    area and accidentally triggers a virtual key.  This often happens when virtual keys
4409    //    are layed out below the screen near to where the on screen keyboard's space bar
4410    //    is displayed.
4411    if (mConfig.virtualKeyQuietTime > 0 &&
4412            !mCurrentRawState.rawPointerData.touchingIdBits.isEmpty()) {
4413        mContext->disableVirtualKeysUntil(when + mConfig.virtualKeyQuietTime);
4414    }
4415    return false;
4416}
4417
4418void TouchInputMapper::dispatchVirtualKey(nsecs_t when, uint32_t policyFlags,
4419        int32_t keyEventAction, int32_t keyEventFlags) {
4420    int32_t keyCode = mCurrentVirtualKey.keyCode;
4421    int32_t scanCode = mCurrentVirtualKey.scanCode;
4422    nsecs_t downTime = mCurrentVirtualKey.downTime;
4423    int32_t metaState = mContext->getGlobalMetaState();
4424    policyFlags |= POLICY_FLAG_VIRTUAL;
4425
4426    NotifyKeyArgs args(when, getDeviceId(), AINPUT_SOURCE_KEYBOARD, policyFlags,
4427            keyEventAction, keyEventFlags, keyCode, scanCode, metaState, downTime);
4428    getListener()->notifyKey(&args);
4429}
4430
4431void TouchInputMapper::abortTouches(nsecs_t when, uint32_t policyFlags) {
4432    BitSet32 currentIdBits = mCurrentCookedState.cookedPointerData.touchingIdBits;
4433    if (!currentIdBits.isEmpty()) {
4434        int32_t metaState = getContext()->getGlobalMetaState();
4435        int32_t buttonState = mCurrentCookedState.buttonState;
4436        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_CANCEL, 0, 0,
4437                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
4438                mCurrentCookedState.cookedPointerData.pointerProperties,
4439                mCurrentCookedState.cookedPointerData.pointerCoords,
4440                mCurrentCookedState.cookedPointerData.idToIndex,
4441                currentIdBits, -1,
4442                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4443        mCurrentMotionAborted = true;
4444    }
4445}
4446
4447void TouchInputMapper::dispatchTouches(nsecs_t when, uint32_t policyFlags) {
4448    BitSet32 currentIdBits = mCurrentCookedState.cookedPointerData.touchingIdBits;
4449    BitSet32 lastIdBits = mLastCookedState.cookedPointerData.touchingIdBits;
4450    int32_t metaState = getContext()->getGlobalMetaState();
4451    int32_t buttonState = mCurrentCookedState.buttonState;
4452
4453    if (currentIdBits == lastIdBits) {
4454        if (!currentIdBits.isEmpty()) {
4455            // No pointer id changes so this is a move event.
4456            // The listener takes care of batching moves so we don't have to deal with that here.
4457            dispatchMotion(when, policyFlags, mSource,
4458                    AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
4459                    AMOTION_EVENT_EDGE_FLAG_NONE,
4460                    mCurrentCookedState.cookedPointerData.pointerProperties,
4461                    mCurrentCookedState.cookedPointerData.pointerCoords,
4462                    mCurrentCookedState.cookedPointerData.idToIndex,
4463                    currentIdBits, -1,
4464                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4465        }
4466    } else {
4467        // There may be pointers going up and pointers going down and pointers moving
4468        // all at the same time.
4469        BitSet32 upIdBits(lastIdBits.value & ~currentIdBits.value);
4470        BitSet32 downIdBits(currentIdBits.value & ~lastIdBits.value);
4471        BitSet32 moveIdBits(lastIdBits.value & currentIdBits.value);
4472        BitSet32 dispatchedIdBits(lastIdBits.value);
4473
4474        // Update last coordinates of pointers that have moved so that we observe the new
4475        // pointer positions at the same time as other pointers that have just gone up.
4476        bool moveNeeded = updateMovedPointers(
4477                mCurrentCookedState.cookedPointerData.pointerProperties,
4478                mCurrentCookedState.cookedPointerData.pointerCoords,
4479                mCurrentCookedState.cookedPointerData.idToIndex,
4480                mLastCookedState.cookedPointerData.pointerProperties,
4481                mLastCookedState.cookedPointerData.pointerCoords,
4482                mLastCookedState.cookedPointerData.idToIndex,
4483                moveIdBits);
4484        if (buttonState != mLastCookedState.buttonState) {
4485            moveNeeded = true;
4486        }
4487
4488        // Dispatch pointer up events.
4489        while (!upIdBits.isEmpty()) {
4490            uint32_t upId = upIdBits.clearFirstMarkedBit();
4491
4492            dispatchMotion(when, policyFlags, mSource,
4493                    AMOTION_EVENT_ACTION_POINTER_UP, 0, 0, metaState, buttonState, 0,
4494                    mLastCookedState.cookedPointerData.pointerProperties,
4495                    mLastCookedState.cookedPointerData.pointerCoords,
4496                    mLastCookedState.cookedPointerData.idToIndex,
4497                    dispatchedIdBits, upId, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4498            dispatchedIdBits.clearBit(upId);
4499        }
4500
4501        // Dispatch move events if any of the remaining pointers moved from their old locations.
4502        // Although applications receive new locations as part of individual pointer up
4503        // events, they do not generally handle them except when presented in a move event.
4504        if (moveNeeded && !moveIdBits.isEmpty()) {
4505            ALOG_ASSERT(moveIdBits.value == dispatchedIdBits.value);
4506            dispatchMotion(when, policyFlags, mSource,
4507                    AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState, 0,
4508                    mCurrentCookedState.cookedPointerData.pointerProperties,
4509                    mCurrentCookedState.cookedPointerData.pointerCoords,
4510                    mCurrentCookedState.cookedPointerData.idToIndex,
4511                    dispatchedIdBits, -1, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4512        }
4513
4514        // Dispatch pointer down events using the new pointer locations.
4515        while (!downIdBits.isEmpty()) {
4516            uint32_t downId = downIdBits.clearFirstMarkedBit();
4517            dispatchedIdBits.markBit(downId);
4518
4519            if (dispatchedIdBits.count() == 1) {
4520                // First pointer is going down.  Set down time.
4521                mDownTime = when;
4522            }
4523
4524            dispatchMotion(when, policyFlags, mSource,
4525                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0, metaState, buttonState, 0,
4526                    mCurrentCookedState.cookedPointerData.pointerProperties,
4527                    mCurrentCookedState.cookedPointerData.pointerCoords,
4528                    mCurrentCookedState.cookedPointerData.idToIndex,
4529                    dispatchedIdBits, downId, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4530        }
4531    }
4532}
4533
4534void TouchInputMapper::dispatchHoverExit(nsecs_t when, uint32_t policyFlags) {
4535    if (mSentHoverEnter &&
4536            (mCurrentCookedState.cookedPointerData.hoveringIdBits.isEmpty()
4537                    || !mCurrentCookedState.cookedPointerData.touchingIdBits.isEmpty())) {
4538        int32_t metaState = getContext()->getGlobalMetaState();
4539        dispatchMotion(when, policyFlags, mSource,
4540                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState, mLastCookedState.buttonState, 0,
4541                mLastCookedState.cookedPointerData.pointerProperties,
4542                mLastCookedState.cookedPointerData.pointerCoords,
4543                mLastCookedState.cookedPointerData.idToIndex,
4544                mLastCookedState.cookedPointerData.hoveringIdBits, -1,
4545                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4546        mSentHoverEnter = false;
4547    }
4548}
4549
4550void TouchInputMapper::dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags) {
4551    if (mCurrentCookedState.cookedPointerData.touchingIdBits.isEmpty()
4552            && !mCurrentCookedState.cookedPointerData.hoveringIdBits.isEmpty()) {
4553        int32_t metaState = getContext()->getGlobalMetaState();
4554        if (!mSentHoverEnter) {
4555            dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_ENTER,
4556                    0, 0, metaState, mCurrentRawState.buttonState, 0,
4557                    mCurrentCookedState.cookedPointerData.pointerProperties,
4558                    mCurrentCookedState.cookedPointerData.pointerCoords,
4559                    mCurrentCookedState.cookedPointerData.idToIndex,
4560                    mCurrentCookedState.cookedPointerData.hoveringIdBits, -1,
4561                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4562            mSentHoverEnter = true;
4563        }
4564
4565        dispatchMotion(when, policyFlags, mSource,
4566                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
4567                mCurrentRawState.buttonState, 0,
4568                mCurrentCookedState.cookedPointerData.pointerProperties,
4569                mCurrentCookedState.cookedPointerData.pointerCoords,
4570                mCurrentCookedState.cookedPointerData.idToIndex,
4571                mCurrentCookedState.cookedPointerData.hoveringIdBits, -1,
4572                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4573    }
4574}
4575
4576void TouchInputMapper::dispatchButtonRelease(nsecs_t when, uint32_t policyFlags) {
4577    BitSet32 releasedButtons(mLastCookedState.buttonState & ~mCurrentCookedState.buttonState);
4578    const BitSet32& idBits = findActiveIdBits(mLastCookedState.cookedPointerData);
4579    const int32_t metaState = getContext()->getGlobalMetaState();
4580    int32_t buttonState = mLastCookedState.buttonState;
4581    while (!releasedButtons.isEmpty()) {
4582        int32_t actionButton = BitSet32::valueForBit(releasedButtons.clearFirstMarkedBit());
4583        buttonState &= ~actionButton;
4584        dispatchMotion(when, policyFlags, mSource,
4585                    AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton,
4586                    0, metaState, buttonState, 0,
4587                    mCurrentCookedState.cookedPointerData.pointerProperties,
4588                    mCurrentCookedState.cookedPointerData.pointerCoords,
4589                    mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
4590                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4591    }
4592}
4593
4594void TouchInputMapper::dispatchButtonPress(nsecs_t when, uint32_t policyFlags) {
4595    BitSet32 pressedButtons(mCurrentCookedState.buttonState & ~mLastCookedState.buttonState);
4596    const BitSet32& idBits = findActiveIdBits(mCurrentCookedState.cookedPointerData);
4597    const int32_t metaState = getContext()->getGlobalMetaState();
4598    int32_t buttonState = mLastCookedState.buttonState;
4599    while (!pressedButtons.isEmpty()) {
4600        int32_t actionButton = BitSet32::valueForBit(pressedButtons.clearFirstMarkedBit());
4601        buttonState |= actionButton;
4602        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton,
4603                    0, metaState, buttonState, 0,
4604                    mCurrentCookedState.cookedPointerData.pointerProperties,
4605                    mCurrentCookedState.cookedPointerData.pointerCoords,
4606                    mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
4607                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
4608    }
4609}
4610
4611const BitSet32& TouchInputMapper::findActiveIdBits(const CookedPointerData& cookedPointerData) {
4612    if (!cookedPointerData.touchingIdBits.isEmpty()) {
4613        return cookedPointerData.touchingIdBits;
4614    }
4615    return cookedPointerData.hoveringIdBits;
4616}
4617
4618void TouchInputMapper::cookPointerData() {
4619    uint32_t currentPointerCount = mCurrentRawState.rawPointerData.pointerCount;
4620
4621    mCurrentCookedState.cookedPointerData.clear();
4622    mCurrentCookedState.cookedPointerData.pointerCount = currentPointerCount;
4623    mCurrentCookedState.cookedPointerData.hoveringIdBits =
4624            mCurrentRawState.rawPointerData.hoveringIdBits;
4625    mCurrentCookedState.cookedPointerData.touchingIdBits =
4626            mCurrentRawState.rawPointerData.touchingIdBits;
4627
4628    if (mCurrentCookedState.cookedPointerData.pointerCount == 0) {
4629        mCurrentCookedState.buttonState = 0;
4630    } else {
4631        mCurrentCookedState.buttonState = mCurrentRawState.buttonState;
4632    }
4633
4634    // Walk through the the active pointers and map device coordinates onto
4635    // surface coordinates and adjust for display orientation.
4636    for (uint32_t i = 0; i < currentPointerCount; i++) {
4637        const RawPointerData::Pointer& in = mCurrentRawState.rawPointerData.pointers[i];
4638
4639        // Size
4640        float touchMajor, touchMinor, toolMajor, toolMinor, size;
4641        switch (mCalibration.sizeCalibration) {
4642        case Calibration::SIZE_CALIBRATION_GEOMETRIC:
4643        case Calibration::SIZE_CALIBRATION_DIAMETER:
4644        case Calibration::SIZE_CALIBRATION_BOX:
4645        case Calibration::SIZE_CALIBRATION_AREA:
4646            if (mRawPointerAxes.touchMajor.valid && mRawPointerAxes.toolMajor.valid) {
4647                touchMajor = in.touchMajor;
4648                touchMinor = mRawPointerAxes.touchMinor.valid ? in.touchMinor : in.touchMajor;
4649                toolMajor = in.toolMajor;
4650                toolMinor = mRawPointerAxes.toolMinor.valid ? in.toolMinor : in.toolMajor;
4651                size = mRawPointerAxes.touchMinor.valid
4652                        ? avg(in.touchMajor, in.touchMinor) : in.touchMajor;
4653            } else if (mRawPointerAxes.touchMajor.valid) {
4654                toolMajor = touchMajor = in.touchMajor;
4655                toolMinor = touchMinor = mRawPointerAxes.touchMinor.valid
4656                        ? in.touchMinor : in.touchMajor;
4657                size = mRawPointerAxes.touchMinor.valid
4658                        ? avg(in.touchMajor, in.touchMinor) : in.touchMajor;
4659            } else if (mRawPointerAxes.toolMajor.valid) {
4660                touchMajor = toolMajor = in.toolMajor;
4661                touchMinor = toolMinor = mRawPointerAxes.toolMinor.valid
4662                        ? in.toolMinor : in.toolMajor;
4663                size = mRawPointerAxes.toolMinor.valid
4664                        ? avg(in.toolMajor, in.toolMinor) : in.toolMajor;
4665            } else {
4666                ALOG_ASSERT(false, "No touch or tool axes.  "
4667                        "Size calibration should have been resolved to NONE.");
4668                touchMajor = 0;
4669                touchMinor = 0;
4670                toolMajor = 0;
4671                toolMinor = 0;
4672                size = 0;
4673            }
4674
4675            if (mCalibration.haveSizeIsSummed && mCalibration.sizeIsSummed) {
4676                uint32_t touchingCount =
4677                        mCurrentRawState.rawPointerData.touchingIdBits.count();
4678                if (touchingCount > 1) {
4679                    touchMajor /= touchingCount;
4680                    touchMinor /= touchingCount;
4681                    toolMajor /= touchingCount;
4682                    toolMinor /= touchingCount;
4683                    size /= touchingCount;
4684                }
4685            }
4686
4687            if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_GEOMETRIC) {
4688                touchMajor *= mGeometricScale;
4689                touchMinor *= mGeometricScale;
4690                toolMajor *= mGeometricScale;
4691                toolMinor *= mGeometricScale;
4692            } else if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_AREA) {
4693                touchMajor = touchMajor > 0 ? sqrtf(touchMajor) : 0;
4694                touchMinor = touchMajor;
4695                toolMajor = toolMajor > 0 ? sqrtf(toolMajor) : 0;
4696                toolMinor = toolMajor;
4697            } else if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_DIAMETER) {
4698                touchMinor = touchMajor;
4699                toolMinor = toolMajor;
4700            }
4701
4702            mCalibration.applySizeScaleAndBias(&touchMajor);
4703            mCalibration.applySizeScaleAndBias(&touchMinor);
4704            mCalibration.applySizeScaleAndBias(&toolMajor);
4705            mCalibration.applySizeScaleAndBias(&toolMinor);
4706            size *= mSizeScale;
4707            break;
4708        default:
4709            touchMajor = 0;
4710            touchMinor = 0;
4711            toolMajor = 0;
4712            toolMinor = 0;
4713            size = 0;
4714            break;
4715        }
4716
4717        // Pressure
4718        float pressure;
4719        switch (mCalibration.pressureCalibration) {
4720        case Calibration::PRESSURE_CALIBRATION_PHYSICAL:
4721        case Calibration::PRESSURE_CALIBRATION_AMPLITUDE:
4722            pressure = in.pressure * mPressureScale;
4723            break;
4724        default:
4725            pressure = in.isHovering ? 0 : 1;
4726            break;
4727        }
4728
4729        // Tilt and Orientation
4730        float tilt;
4731        float orientation;
4732        if (mHaveTilt) {
4733            float tiltXAngle = (in.tiltX - mTiltXCenter) * mTiltXScale;
4734            float tiltYAngle = (in.tiltY - mTiltYCenter) * mTiltYScale;
4735            orientation = atan2f(-sinf(tiltXAngle), sinf(tiltYAngle));
4736            tilt = acosf(cosf(tiltXAngle) * cosf(tiltYAngle));
4737        } else {
4738            tilt = 0;
4739
4740            switch (mCalibration.orientationCalibration) {
4741            case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
4742                orientation = in.orientation * mOrientationScale;
4743                break;
4744            case Calibration::ORIENTATION_CALIBRATION_VECTOR: {
4745                int32_t c1 = signExtendNybble((in.orientation & 0xf0) >> 4);
4746                int32_t c2 = signExtendNybble(in.orientation & 0x0f);
4747                if (c1 != 0 || c2 != 0) {
4748                    orientation = atan2f(c1, c2) * 0.5f;
4749                    float confidence = hypotf(c1, c2);
4750                    float scale = 1.0f + confidence / 16.0f;
4751                    touchMajor *= scale;
4752                    touchMinor /= scale;
4753                    toolMajor *= scale;
4754                    toolMinor /= scale;
4755                } else {
4756                    orientation = 0;
4757                }
4758                break;
4759            }
4760            default:
4761                orientation = 0;
4762            }
4763        }
4764
4765        // Distance
4766        float distance;
4767        switch (mCalibration.distanceCalibration) {
4768        case Calibration::DISTANCE_CALIBRATION_SCALED:
4769            distance = in.distance * mDistanceScale;
4770            break;
4771        default:
4772            distance = 0;
4773        }
4774
4775        // Coverage
4776        int32_t rawLeft, rawTop, rawRight, rawBottom;
4777        switch (mCalibration.coverageCalibration) {
4778        case Calibration::COVERAGE_CALIBRATION_BOX:
4779            rawLeft = (in.toolMinor & 0xffff0000) >> 16;
4780            rawRight = in.toolMinor & 0x0000ffff;
4781            rawBottom = in.toolMajor & 0x0000ffff;
4782            rawTop = (in.toolMajor & 0xffff0000) >> 16;
4783            break;
4784        default:
4785            rawLeft = rawTop = rawRight = rawBottom = 0;
4786            break;
4787        }
4788
4789        // Adjust X,Y coords for device calibration
4790        // TODO: Adjust coverage coords?
4791        float xTransformed = in.x, yTransformed = in.y;
4792        mAffineTransform.applyTo(xTransformed, yTransformed);
4793
4794        // Adjust X, Y, and coverage coords for surface orientation.
4795        float x, y;
4796        float left, top, right, bottom;
4797
4798        switch (mSurfaceOrientation) {
4799        case DISPLAY_ORIENTATION_90:
4800            x = float(yTransformed - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4801            y = float(mRawPointerAxes.x.maxValue - xTransformed) * mXScale + mXTranslate;
4802            left = float(rawTop - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4803            right = float(rawBottom- mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4804            bottom = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale + mXTranslate;
4805            top = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale + mXTranslate;
4806            orientation -= M_PI_2;
4807            if (mOrientedRanges.haveOrientation && orientation < mOrientedRanges.orientation.min) {
4808                orientation += (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
4809            }
4810            break;
4811        case DISPLAY_ORIENTATION_180:
4812            x = float(mRawPointerAxes.x.maxValue - xTransformed) * mXScale + mXTranslate;
4813            y = float(mRawPointerAxes.y.maxValue - yTransformed) * mYScale + mYTranslate;
4814            left = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale + mXTranslate;
4815            right = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale + mXTranslate;
4816            bottom = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale + mYTranslate;
4817            top = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale + mYTranslate;
4818            orientation -= M_PI;
4819            if (mOrientedRanges.haveOrientation && orientation < mOrientedRanges.orientation.min) {
4820                orientation += (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
4821            }
4822            break;
4823        case DISPLAY_ORIENTATION_270:
4824            x = float(mRawPointerAxes.y.maxValue - yTransformed) * mYScale + mYTranslate;
4825            y = float(xTransformed - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4826            left = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale + mYTranslate;
4827            right = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale + mYTranslate;
4828            bottom = float(rawRight - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4829            top = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4830            orientation += M_PI_2;
4831            if (mOrientedRanges.haveOrientation && orientation > mOrientedRanges.orientation.max) {
4832                orientation -= (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
4833            }
4834            break;
4835        default:
4836            x = float(xTransformed - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4837            y = float(yTransformed - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4838            left = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4839            right = float(rawRight - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
4840            bottom = float(rawBottom - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4841            top = float(rawTop - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
4842            break;
4843        }
4844
4845        // Write output coords.
4846        PointerCoords& out = mCurrentCookedState.cookedPointerData.pointerCoords[i];
4847        out.clear();
4848        out.setAxisValue(AMOTION_EVENT_AXIS_X, x);
4849        out.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
4850        out.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, pressure);
4851        out.setAxisValue(AMOTION_EVENT_AXIS_SIZE, size);
4852        out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR, touchMajor);
4853        out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR, touchMinor);
4854        out.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, orientation);
4855        out.setAxisValue(AMOTION_EVENT_AXIS_TILT, tilt);
4856        out.setAxisValue(AMOTION_EVENT_AXIS_DISTANCE, distance);
4857        if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_BOX) {
4858            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_1, left);
4859            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_2, top);
4860            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_3, right);
4861            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_4, bottom);
4862        } else {
4863            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, toolMajor);
4864            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR, toolMinor);
4865        }
4866
4867        // Write output properties.
4868        PointerProperties& properties =
4869                mCurrentCookedState.cookedPointerData.pointerProperties[i];
4870        uint32_t id = in.id;
4871        properties.clear();
4872        properties.id = id;
4873        properties.toolType = in.toolType;
4874
4875        // Write id index.
4876        mCurrentCookedState.cookedPointerData.idToIndex[id] = i;
4877    }
4878}
4879
4880void TouchInputMapper::dispatchPointerUsage(nsecs_t when, uint32_t policyFlags,
4881        PointerUsage pointerUsage) {
4882    if (pointerUsage != mPointerUsage) {
4883        abortPointerUsage(when, policyFlags);
4884        mPointerUsage = pointerUsage;
4885    }
4886
4887    switch (mPointerUsage) {
4888    case POINTER_USAGE_GESTURES:
4889        dispatchPointerGestures(when, policyFlags, false /*isTimeout*/);
4890        break;
4891    case POINTER_USAGE_STYLUS:
4892        dispatchPointerStylus(when, policyFlags);
4893        break;
4894    case POINTER_USAGE_MOUSE:
4895        dispatchPointerMouse(when, policyFlags);
4896        break;
4897    default:
4898        break;
4899    }
4900}
4901
4902void TouchInputMapper::abortPointerUsage(nsecs_t when, uint32_t policyFlags) {
4903    switch (mPointerUsage) {
4904    case POINTER_USAGE_GESTURES:
4905        abortPointerGestures(when, policyFlags);
4906        break;
4907    case POINTER_USAGE_STYLUS:
4908        abortPointerStylus(when, policyFlags);
4909        break;
4910    case POINTER_USAGE_MOUSE:
4911        abortPointerMouse(when, policyFlags);
4912        break;
4913    default:
4914        break;
4915    }
4916
4917    mPointerUsage = POINTER_USAGE_NONE;
4918}
4919
4920void TouchInputMapper::dispatchPointerGestures(nsecs_t when, uint32_t policyFlags,
4921        bool isTimeout) {
4922    // Update current gesture coordinates.
4923    bool cancelPreviousGesture, finishPreviousGesture;
4924    bool sendEvents = preparePointerGestures(when,
4925            &cancelPreviousGesture, &finishPreviousGesture, isTimeout);
4926    if (!sendEvents) {
4927        return;
4928    }
4929    if (finishPreviousGesture) {
4930        cancelPreviousGesture = false;
4931    }
4932
4933    // Update the pointer presentation and spots.
4934    if (mParameters.gestureMode == Parameters::GESTURE_MODE_MULTI_TOUCH) {
4935        mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
4936        if (finishPreviousGesture || cancelPreviousGesture) {
4937            mPointerController->clearSpots();
4938        }
4939
4940        if (mPointerGesture.currentGestureMode == PointerGesture::FREEFORM) {
4941            mPointerController->setSpots(mPointerGesture.currentGestureCoords,
4942                     mPointerGesture.currentGestureIdToIndex,
4943                     mPointerGesture.currentGestureIdBits);
4944        }
4945    } else {
4946        mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
4947    }
4948
4949    // Show or hide the pointer if needed.
4950    switch (mPointerGesture.currentGestureMode) {
4951    case PointerGesture::NEUTRAL:
4952    case PointerGesture::QUIET:
4953        if (mParameters.gestureMode == Parameters::GESTURE_MODE_MULTI_TOUCH
4954                && mPointerGesture.lastGestureMode == PointerGesture::FREEFORM) {
4955            // Remind the user of where the pointer is after finishing a gesture with spots.
4956            mPointerController->unfade(PointerControllerInterface::TRANSITION_GRADUAL);
4957        }
4958        break;
4959    case PointerGesture::TAP:
4960    case PointerGesture::TAP_DRAG:
4961    case PointerGesture::BUTTON_CLICK_OR_DRAG:
4962    case PointerGesture::HOVER:
4963    case PointerGesture::PRESS:
4964    case PointerGesture::SWIPE:
4965        // Unfade the pointer when the current gesture manipulates the
4966        // area directly under the pointer.
4967        mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
4968        break;
4969    case PointerGesture::FREEFORM:
4970        // Fade the pointer when the current gesture manipulates a different
4971        // area and there are spots to guide the user experience.
4972        if (mParameters.gestureMode == Parameters::GESTURE_MODE_MULTI_TOUCH) {
4973            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
4974        } else {
4975            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
4976        }
4977        break;
4978    }
4979
4980    // Send events!
4981    int32_t metaState = getContext()->getGlobalMetaState();
4982    int32_t buttonState = mCurrentCookedState.buttonState;
4983
4984    // Update last coordinates of pointers that have moved so that we observe the new
4985    // pointer positions at the same time as other pointers that have just gone up.
4986    bool down = mPointerGesture.currentGestureMode == PointerGesture::TAP
4987            || mPointerGesture.currentGestureMode == PointerGesture::TAP_DRAG
4988            || mPointerGesture.currentGestureMode == PointerGesture::BUTTON_CLICK_OR_DRAG
4989            || mPointerGesture.currentGestureMode == PointerGesture::PRESS
4990            || mPointerGesture.currentGestureMode == PointerGesture::SWIPE
4991            || mPointerGesture.currentGestureMode == PointerGesture::FREEFORM;
4992    bool moveNeeded = false;
4993    if (down && !cancelPreviousGesture && !finishPreviousGesture
4994            && !mPointerGesture.lastGestureIdBits.isEmpty()
4995            && !mPointerGesture.currentGestureIdBits.isEmpty()) {
4996        BitSet32 movedGestureIdBits(mPointerGesture.currentGestureIdBits.value
4997                & mPointerGesture.lastGestureIdBits.value);
4998        moveNeeded = updateMovedPointers(mPointerGesture.currentGestureProperties,
4999                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
5000                mPointerGesture.lastGestureProperties,
5001                mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
5002                movedGestureIdBits);
5003        if (buttonState != mLastCookedState.buttonState) {
5004            moveNeeded = true;
5005        }
5006    }
5007
5008    // Send motion events for all pointers that went up or were canceled.
5009    BitSet32 dispatchedGestureIdBits(mPointerGesture.lastGestureIdBits);
5010    if (!dispatchedGestureIdBits.isEmpty()) {
5011        if (cancelPreviousGesture) {
5012            dispatchMotion(when, policyFlags, mSource,
5013                    AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState, buttonState,
5014                    AMOTION_EVENT_EDGE_FLAG_NONE,
5015                    mPointerGesture.lastGestureProperties,
5016                    mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
5017                    dispatchedGestureIdBits, -1, 0,
5018                    0, mPointerGesture.downTime);
5019
5020            dispatchedGestureIdBits.clear();
5021        } else {
5022            BitSet32 upGestureIdBits;
5023            if (finishPreviousGesture) {
5024                upGestureIdBits = dispatchedGestureIdBits;
5025            } else {
5026                upGestureIdBits.value = dispatchedGestureIdBits.value
5027                        & ~mPointerGesture.currentGestureIdBits.value;
5028            }
5029            while (!upGestureIdBits.isEmpty()) {
5030                uint32_t id = upGestureIdBits.clearFirstMarkedBit();
5031
5032                dispatchMotion(when, policyFlags, mSource,
5033                        AMOTION_EVENT_ACTION_POINTER_UP, 0, 0,
5034                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
5035                        mPointerGesture.lastGestureProperties,
5036                        mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
5037                        dispatchedGestureIdBits, id,
5038                        0, 0, mPointerGesture.downTime);
5039
5040                dispatchedGestureIdBits.clearBit(id);
5041            }
5042        }
5043    }
5044
5045    // Send motion events for all pointers that moved.
5046    if (moveNeeded) {
5047        dispatchMotion(when, policyFlags, mSource,
5048                AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
5049                AMOTION_EVENT_EDGE_FLAG_NONE,
5050                mPointerGesture.currentGestureProperties,
5051                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
5052                dispatchedGestureIdBits, -1,
5053                0, 0, mPointerGesture.downTime);
5054    }
5055
5056    // Send motion events for all pointers that went down.
5057    if (down) {
5058        BitSet32 downGestureIdBits(mPointerGesture.currentGestureIdBits.value
5059                & ~dispatchedGestureIdBits.value);
5060        while (!downGestureIdBits.isEmpty()) {
5061            uint32_t id = downGestureIdBits.clearFirstMarkedBit();
5062            dispatchedGestureIdBits.markBit(id);
5063
5064            if (dispatchedGestureIdBits.count() == 1) {
5065                mPointerGesture.downTime = when;
5066            }
5067
5068            dispatchMotion(when, policyFlags, mSource,
5069                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0, metaState, buttonState, 0,
5070                    mPointerGesture.currentGestureProperties,
5071                    mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
5072                    dispatchedGestureIdBits, id,
5073                    0, 0, mPointerGesture.downTime);
5074        }
5075    }
5076
5077    // Send motion events for hover.
5078    if (mPointerGesture.currentGestureMode == PointerGesture::HOVER) {
5079        dispatchMotion(when, policyFlags, mSource,
5080                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
5081                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
5082                mPointerGesture.currentGestureProperties,
5083                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
5084                mPointerGesture.currentGestureIdBits, -1,
5085                0, 0, mPointerGesture.downTime);
5086    } else if (dispatchedGestureIdBits.isEmpty()
5087            && !mPointerGesture.lastGestureIdBits.isEmpty()) {
5088        // Synthesize a hover move event after all pointers go up to indicate that
5089        // the pointer is hovering again even if the user is not currently touching
5090        // the touch pad.  This ensures that a view will receive a fresh hover enter
5091        // event after a tap.
5092        float x, y;
5093        mPointerController->getPosition(&x, &y);
5094
5095        PointerProperties pointerProperties;
5096        pointerProperties.clear();
5097        pointerProperties.id = 0;
5098        pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
5099
5100        PointerCoords pointerCoords;
5101        pointerCoords.clear();
5102        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
5103        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5104
5105        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
5106                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
5107                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
5108                mViewport.displayId, 1, &pointerProperties, &pointerCoords,
5109                0, 0, mPointerGesture.downTime);
5110        getListener()->notifyMotion(&args);
5111    }
5112
5113    // Update state.
5114    mPointerGesture.lastGestureMode = mPointerGesture.currentGestureMode;
5115    if (!down) {
5116        mPointerGesture.lastGestureIdBits.clear();
5117    } else {
5118        mPointerGesture.lastGestureIdBits = mPointerGesture.currentGestureIdBits;
5119        for (BitSet32 idBits(mPointerGesture.currentGestureIdBits); !idBits.isEmpty(); ) {
5120            uint32_t id = idBits.clearFirstMarkedBit();
5121            uint32_t index = mPointerGesture.currentGestureIdToIndex[id];
5122            mPointerGesture.lastGestureProperties[index].copyFrom(
5123                    mPointerGesture.currentGestureProperties[index]);
5124            mPointerGesture.lastGestureCoords[index].copyFrom(
5125                    mPointerGesture.currentGestureCoords[index]);
5126            mPointerGesture.lastGestureIdToIndex[id] = index;
5127        }
5128    }
5129}
5130
5131void TouchInputMapper::abortPointerGestures(nsecs_t when, uint32_t policyFlags) {
5132    // Cancel previously dispatches pointers.
5133    if (!mPointerGesture.lastGestureIdBits.isEmpty()) {
5134        int32_t metaState = getContext()->getGlobalMetaState();
5135        int32_t buttonState = mCurrentRawState.buttonState;
5136        dispatchMotion(when, policyFlags, mSource,
5137                AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState, buttonState,
5138                AMOTION_EVENT_EDGE_FLAG_NONE,
5139                mPointerGesture.lastGestureProperties,
5140                mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
5141                mPointerGesture.lastGestureIdBits, -1,
5142                0, 0, mPointerGesture.downTime);
5143    }
5144
5145    // Reset the current pointer gesture.
5146    mPointerGesture.reset();
5147    mPointerVelocityControl.reset();
5148
5149    // Remove any current spots.
5150    if (mPointerController != NULL) {
5151        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
5152        mPointerController->clearSpots();
5153    }
5154}
5155
5156bool TouchInputMapper::preparePointerGestures(nsecs_t when,
5157        bool* outCancelPreviousGesture, bool* outFinishPreviousGesture, bool isTimeout) {
5158    *outCancelPreviousGesture = false;
5159    *outFinishPreviousGesture = false;
5160
5161    // Handle TAP timeout.
5162    if (isTimeout) {
5163#if DEBUG_GESTURES
5164        ALOGD("Gestures: Processing timeout");
5165#endif
5166
5167        if (mPointerGesture.lastGestureMode == PointerGesture::TAP) {
5168            if (when <= mPointerGesture.tapUpTime + mConfig.pointerGestureTapDragInterval) {
5169                // The tap/drag timeout has not yet expired.
5170                getContext()->requestTimeoutAtTime(mPointerGesture.tapUpTime
5171                        + mConfig.pointerGestureTapDragInterval);
5172            } else {
5173                // The tap is finished.
5174#if DEBUG_GESTURES
5175                ALOGD("Gestures: TAP finished");
5176#endif
5177                *outFinishPreviousGesture = true;
5178
5179                mPointerGesture.activeGestureId = -1;
5180                mPointerGesture.currentGestureMode = PointerGesture::NEUTRAL;
5181                mPointerGesture.currentGestureIdBits.clear();
5182
5183                mPointerVelocityControl.reset();
5184                return true;
5185            }
5186        }
5187
5188        // We did not handle this timeout.
5189        return false;
5190    }
5191
5192    const uint32_t currentFingerCount = mCurrentCookedState.fingerIdBits.count();
5193    const uint32_t lastFingerCount = mLastCookedState.fingerIdBits.count();
5194
5195    // Update the velocity tracker.
5196    {
5197        VelocityTracker::Position positions[MAX_POINTERS];
5198        uint32_t count = 0;
5199        for (BitSet32 idBits(mCurrentCookedState.fingerIdBits); !idBits.isEmpty(); count++) {
5200            uint32_t id = idBits.clearFirstMarkedBit();
5201            const RawPointerData::Pointer& pointer =
5202                    mCurrentRawState.rawPointerData.pointerForId(id);
5203            positions[count].x = pointer.x * mPointerXMovementScale;
5204            positions[count].y = pointer.y * mPointerYMovementScale;
5205        }
5206        mPointerGesture.velocityTracker.addMovement(when,
5207                mCurrentCookedState.fingerIdBits, positions);
5208    }
5209
5210    // If the gesture ever enters a mode other than TAP, HOVER or TAP_DRAG, without first returning
5211    // to NEUTRAL, then we should not generate tap event.
5212    if (mPointerGesture.lastGestureMode != PointerGesture::HOVER
5213            && mPointerGesture.lastGestureMode != PointerGesture::TAP
5214            && mPointerGesture.lastGestureMode != PointerGesture::TAP_DRAG) {
5215        mPointerGesture.resetTap();
5216    }
5217
5218    // Pick a new active touch id if needed.
5219    // Choose an arbitrary pointer that just went down, if there is one.
5220    // Otherwise choose an arbitrary remaining pointer.
5221    // This guarantees we always have an active touch id when there is at least one pointer.
5222    // We keep the same active touch id for as long as possible.
5223    bool activeTouchChanged = false;
5224    int32_t lastActiveTouchId = mPointerGesture.activeTouchId;
5225    int32_t activeTouchId = lastActiveTouchId;
5226    if (activeTouchId < 0) {
5227        if (!mCurrentCookedState.fingerIdBits.isEmpty()) {
5228            activeTouchChanged = true;
5229            activeTouchId = mPointerGesture.activeTouchId =
5230                    mCurrentCookedState.fingerIdBits.firstMarkedBit();
5231            mPointerGesture.firstTouchTime = when;
5232        }
5233    } else if (!mCurrentCookedState.fingerIdBits.hasBit(activeTouchId)) {
5234        activeTouchChanged = true;
5235        if (!mCurrentCookedState.fingerIdBits.isEmpty()) {
5236            activeTouchId = mPointerGesture.activeTouchId =
5237                    mCurrentCookedState.fingerIdBits.firstMarkedBit();
5238        } else {
5239            activeTouchId = mPointerGesture.activeTouchId = -1;
5240        }
5241    }
5242
5243    // Determine whether we are in quiet time.
5244    bool isQuietTime = false;
5245    if (activeTouchId < 0) {
5246        mPointerGesture.resetQuietTime();
5247    } else {
5248        isQuietTime = when < mPointerGesture.quietTime + mConfig.pointerGestureQuietInterval;
5249        if (!isQuietTime) {
5250            if ((mPointerGesture.lastGestureMode == PointerGesture::PRESS
5251                    || mPointerGesture.lastGestureMode == PointerGesture::SWIPE
5252                    || mPointerGesture.lastGestureMode == PointerGesture::FREEFORM)
5253                    && currentFingerCount < 2) {
5254                // Enter quiet time when exiting swipe or freeform state.
5255                // This is to prevent accidentally entering the hover state and flinging the
5256                // pointer when finishing a swipe and there is still one pointer left onscreen.
5257                isQuietTime = true;
5258            } else if (mPointerGesture.lastGestureMode == PointerGesture::BUTTON_CLICK_OR_DRAG
5259                    && currentFingerCount >= 2
5260                    && !isPointerDown(mCurrentRawState.buttonState)) {
5261                // Enter quiet time when releasing the button and there are still two or more
5262                // fingers down.  This may indicate that one finger was used to press the button
5263                // but it has not gone up yet.
5264                isQuietTime = true;
5265            }
5266            if (isQuietTime) {
5267                mPointerGesture.quietTime = when;
5268            }
5269        }
5270    }
5271
5272    // Switch states based on button and pointer state.
5273    if (isQuietTime) {
5274        // Case 1: Quiet time. (QUIET)
5275#if DEBUG_GESTURES
5276        ALOGD("Gestures: QUIET for next %0.3fms", (mPointerGesture.quietTime
5277                + mConfig.pointerGestureQuietInterval - when) * 0.000001f);
5278#endif
5279        if (mPointerGesture.lastGestureMode != PointerGesture::QUIET) {
5280            *outFinishPreviousGesture = true;
5281        }
5282
5283        mPointerGesture.activeGestureId = -1;
5284        mPointerGesture.currentGestureMode = PointerGesture::QUIET;
5285        mPointerGesture.currentGestureIdBits.clear();
5286
5287        mPointerVelocityControl.reset();
5288    } else if (isPointerDown(mCurrentRawState.buttonState)) {
5289        // Case 2: Button is pressed. (BUTTON_CLICK_OR_DRAG)
5290        // The pointer follows the active touch point.
5291        // Emit DOWN, MOVE, UP events at the pointer location.
5292        //
5293        // Only the active touch matters; other fingers are ignored.  This policy helps
5294        // to handle the case where the user places a second finger on the touch pad
5295        // to apply the necessary force to depress an integrated button below the surface.
5296        // We don't want the second finger to be delivered to applications.
5297        //
5298        // For this to work well, we need to make sure to track the pointer that is really
5299        // active.  If the user first puts one finger down to click then adds another
5300        // finger to drag then the active pointer should switch to the finger that is
5301        // being dragged.
5302#if DEBUG_GESTURES
5303        ALOGD("Gestures: BUTTON_CLICK_OR_DRAG activeTouchId=%d, "
5304                "currentFingerCount=%d", activeTouchId, currentFingerCount);
5305#endif
5306        // Reset state when just starting.
5307        if (mPointerGesture.lastGestureMode != PointerGesture::BUTTON_CLICK_OR_DRAG) {
5308            *outFinishPreviousGesture = true;
5309            mPointerGesture.activeGestureId = 0;
5310        }
5311
5312        // Switch pointers if needed.
5313        // Find the fastest pointer and follow it.
5314        if (activeTouchId >= 0 && currentFingerCount > 1) {
5315            int32_t bestId = -1;
5316            float bestSpeed = mConfig.pointerGestureDragMinSwitchSpeed;
5317            for (BitSet32 idBits(mCurrentCookedState.fingerIdBits); !idBits.isEmpty(); ) {
5318                uint32_t id = idBits.clearFirstMarkedBit();
5319                float vx, vy;
5320                if (mPointerGesture.velocityTracker.getVelocity(id, &vx, &vy)) {
5321                    float speed = hypotf(vx, vy);
5322                    if (speed > bestSpeed) {
5323                        bestId = id;
5324                        bestSpeed = speed;
5325                    }
5326                }
5327            }
5328            if (bestId >= 0 && bestId != activeTouchId) {
5329                mPointerGesture.activeTouchId = activeTouchId = bestId;
5330                activeTouchChanged = true;
5331#if DEBUG_GESTURES
5332                ALOGD("Gestures: BUTTON_CLICK_OR_DRAG switched pointers, "
5333                        "bestId=%d, bestSpeed=%0.3f", bestId, bestSpeed);
5334#endif
5335            }
5336        }
5337
5338        float deltaX = 0, deltaY = 0;
5339        if (activeTouchId >= 0 && mLastCookedState.fingerIdBits.hasBit(activeTouchId)) {
5340            const RawPointerData::Pointer& currentPointer =
5341                    mCurrentRawState.rawPointerData.pointerForId(activeTouchId);
5342            const RawPointerData::Pointer& lastPointer =
5343                    mLastRawState.rawPointerData.pointerForId(activeTouchId);
5344            deltaX = (currentPointer.x - lastPointer.x) * mPointerXMovementScale;
5345            deltaY = (currentPointer.y - lastPointer.y) * mPointerYMovementScale;
5346
5347            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5348            mPointerVelocityControl.move(when, &deltaX, &deltaY);
5349
5350            // Move the pointer using a relative motion.
5351            // When using spots, the click will occur at the position of the anchor
5352            // spot and all other spots will move there.
5353            mPointerController->move(deltaX, deltaY);
5354        } else {
5355            mPointerVelocityControl.reset();
5356        }
5357
5358        float x, y;
5359        mPointerController->getPosition(&x, &y);
5360
5361        mPointerGesture.currentGestureMode = PointerGesture::BUTTON_CLICK_OR_DRAG;
5362        mPointerGesture.currentGestureIdBits.clear();
5363        mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
5364        mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
5365        mPointerGesture.currentGestureProperties[0].clear();
5366        mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
5367        mPointerGesture.currentGestureProperties[0].toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
5368        mPointerGesture.currentGestureCoords[0].clear();
5369        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
5370        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5371        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5372        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X, deltaX);
5373        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y, deltaY);
5374    } else if (currentFingerCount == 0) {
5375        // Case 3. No fingers down and button is not pressed. (NEUTRAL)
5376        if (mPointerGesture.lastGestureMode != PointerGesture::NEUTRAL) {
5377            *outFinishPreviousGesture = true;
5378        }
5379
5380        // Watch for taps coming out of HOVER or TAP_DRAG mode.
5381        // Checking for taps after TAP_DRAG allows us to detect double-taps.
5382        bool tapped = false;
5383        if ((mPointerGesture.lastGestureMode == PointerGesture::HOVER
5384                || mPointerGesture.lastGestureMode == PointerGesture::TAP_DRAG)
5385                && lastFingerCount == 1) {
5386            if (when <= mPointerGesture.tapDownTime + mConfig.pointerGestureTapInterval) {
5387                float x, y;
5388                mPointerController->getPosition(&x, &y);
5389                if (fabs(x - mPointerGesture.tapX) <= mConfig.pointerGestureTapSlop
5390                        && fabs(y - mPointerGesture.tapY) <= mConfig.pointerGestureTapSlop) {
5391#if DEBUG_GESTURES
5392                    ALOGD("Gestures: TAP");
5393#endif
5394
5395                    mPointerGesture.tapUpTime = when;
5396                    getContext()->requestTimeoutAtTime(when
5397                            + mConfig.pointerGestureTapDragInterval);
5398
5399                    mPointerGesture.activeGestureId = 0;
5400                    mPointerGesture.currentGestureMode = PointerGesture::TAP;
5401                    mPointerGesture.currentGestureIdBits.clear();
5402                    mPointerGesture.currentGestureIdBits.markBit(
5403                            mPointerGesture.activeGestureId);
5404                    mPointerGesture.currentGestureIdToIndex[
5405                            mPointerGesture.activeGestureId] = 0;
5406                    mPointerGesture.currentGestureProperties[0].clear();
5407                    mPointerGesture.currentGestureProperties[0].id =
5408                            mPointerGesture.activeGestureId;
5409                    mPointerGesture.currentGestureProperties[0].toolType =
5410                            AMOTION_EVENT_TOOL_TYPE_FINGER;
5411                    mPointerGesture.currentGestureCoords[0].clear();
5412                    mPointerGesture.currentGestureCoords[0].setAxisValue(
5413                            AMOTION_EVENT_AXIS_X, mPointerGesture.tapX);
5414                    mPointerGesture.currentGestureCoords[0].setAxisValue(
5415                            AMOTION_EVENT_AXIS_Y, mPointerGesture.tapY);
5416                    mPointerGesture.currentGestureCoords[0].setAxisValue(
5417                            AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5418
5419                    tapped = true;
5420                } else {
5421#if DEBUG_GESTURES
5422                    ALOGD("Gestures: Not a TAP, deltaX=%f, deltaY=%f",
5423                            x - mPointerGesture.tapX,
5424                            y - mPointerGesture.tapY);
5425#endif
5426                }
5427            } else {
5428#if DEBUG_GESTURES
5429                if (mPointerGesture.tapDownTime != LLONG_MIN) {
5430                    ALOGD("Gestures: Not a TAP, %0.3fms since down",
5431                            (when - mPointerGesture.tapDownTime) * 0.000001f);
5432                } else {
5433                    ALOGD("Gestures: Not a TAP, incompatible mode transitions");
5434                }
5435#endif
5436            }
5437        }
5438
5439        mPointerVelocityControl.reset();
5440
5441        if (!tapped) {
5442#if DEBUG_GESTURES
5443            ALOGD("Gestures: NEUTRAL");
5444#endif
5445            mPointerGesture.activeGestureId = -1;
5446            mPointerGesture.currentGestureMode = PointerGesture::NEUTRAL;
5447            mPointerGesture.currentGestureIdBits.clear();
5448        }
5449    } else if (currentFingerCount == 1) {
5450        // Case 4. Exactly one finger down, button is not pressed. (HOVER or TAP_DRAG)
5451        // The pointer follows the active touch point.
5452        // When in HOVER, emit HOVER_MOVE events at the pointer location.
5453        // When in TAP_DRAG, emit MOVE events at the pointer location.
5454        ALOG_ASSERT(activeTouchId >= 0);
5455
5456        mPointerGesture.currentGestureMode = PointerGesture::HOVER;
5457        if (mPointerGesture.lastGestureMode == PointerGesture::TAP) {
5458            if (when <= mPointerGesture.tapUpTime + mConfig.pointerGestureTapDragInterval) {
5459                float x, y;
5460                mPointerController->getPosition(&x, &y);
5461                if (fabs(x - mPointerGesture.tapX) <= mConfig.pointerGestureTapSlop
5462                        && fabs(y - mPointerGesture.tapY) <= mConfig.pointerGestureTapSlop) {
5463                    mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
5464                } else {
5465#if DEBUG_GESTURES
5466                    ALOGD("Gestures: Not a TAP_DRAG, deltaX=%f, deltaY=%f",
5467                            x - mPointerGesture.tapX,
5468                            y - mPointerGesture.tapY);
5469#endif
5470                }
5471            } else {
5472#if DEBUG_GESTURES
5473                ALOGD("Gestures: Not a TAP_DRAG, %0.3fms time since up",
5474                        (when - mPointerGesture.tapUpTime) * 0.000001f);
5475#endif
5476            }
5477        } else if (mPointerGesture.lastGestureMode == PointerGesture::TAP_DRAG) {
5478            mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
5479        }
5480
5481        float deltaX = 0, deltaY = 0;
5482        if (mLastCookedState.fingerIdBits.hasBit(activeTouchId)) {
5483            const RawPointerData::Pointer& currentPointer =
5484                    mCurrentRawState.rawPointerData.pointerForId(activeTouchId);
5485            const RawPointerData::Pointer& lastPointer =
5486                    mLastRawState.rawPointerData.pointerForId(activeTouchId);
5487            deltaX = (currentPointer.x - lastPointer.x) * mPointerXMovementScale;
5488            deltaY = (currentPointer.y - lastPointer.y) * mPointerYMovementScale;
5489
5490            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5491            mPointerVelocityControl.move(when, &deltaX, &deltaY);
5492
5493            // Move the pointer using a relative motion.
5494            // When using spots, the hover or drag will occur at the position of the anchor spot.
5495            mPointerController->move(deltaX, deltaY);
5496        } else {
5497            mPointerVelocityControl.reset();
5498        }
5499
5500        bool down;
5501        if (mPointerGesture.currentGestureMode == PointerGesture::TAP_DRAG) {
5502#if DEBUG_GESTURES
5503            ALOGD("Gestures: TAP_DRAG");
5504#endif
5505            down = true;
5506        } else {
5507#if DEBUG_GESTURES
5508            ALOGD("Gestures: HOVER");
5509#endif
5510            if (mPointerGesture.lastGestureMode != PointerGesture::HOVER) {
5511                *outFinishPreviousGesture = true;
5512            }
5513            mPointerGesture.activeGestureId = 0;
5514            down = false;
5515        }
5516
5517        float x, y;
5518        mPointerController->getPosition(&x, &y);
5519
5520        mPointerGesture.currentGestureIdBits.clear();
5521        mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
5522        mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
5523        mPointerGesture.currentGestureProperties[0].clear();
5524        mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
5525        mPointerGesture.currentGestureProperties[0].toolType =
5526                AMOTION_EVENT_TOOL_TYPE_FINGER;
5527        mPointerGesture.currentGestureCoords[0].clear();
5528        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
5529        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5530        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
5531                down ? 1.0f : 0.0f);
5532        mPointerGesture.currentGestureCoords[0].setAxisValue(
5533                AMOTION_EVENT_AXIS_RELATIVE_X, deltaX);
5534        mPointerGesture.currentGestureCoords[0].setAxisValue(
5535                AMOTION_EVENT_AXIS_RELATIVE_Y, deltaY);
5536
5537        if (lastFingerCount == 0 && currentFingerCount != 0) {
5538            mPointerGesture.resetTap();
5539            mPointerGesture.tapDownTime = when;
5540            mPointerGesture.tapX = x;
5541            mPointerGesture.tapY = y;
5542        }
5543    } else {
5544        // Case 5. At least two fingers down, button is not pressed. (PRESS, SWIPE or FREEFORM)
5545        // We need to provide feedback for each finger that goes down so we cannot wait
5546        // for the fingers to move before deciding what to do.
5547        //
5548        // The ambiguous case is deciding what to do when there are two fingers down but they
5549        // have not moved enough to determine whether they are part of a drag or part of a
5550        // freeform gesture, or just a press or long-press at the pointer location.
5551        //
5552        // When there are two fingers we start with the PRESS hypothesis and we generate a
5553        // down at the pointer location.
5554        //
5555        // When the two fingers move enough or when additional fingers are added, we make
5556        // a decision to transition into SWIPE or FREEFORM mode accordingly.
5557        ALOG_ASSERT(activeTouchId >= 0);
5558
5559        bool settled = when >= mPointerGesture.firstTouchTime
5560                + mConfig.pointerGestureMultitouchSettleInterval;
5561        if (mPointerGesture.lastGestureMode != PointerGesture::PRESS
5562                && mPointerGesture.lastGestureMode != PointerGesture::SWIPE
5563                && mPointerGesture.lastGestureMode != PointerGesture::FREEFORM) {
5564            *outFinishPreviousGesture = true;
5565        } else if (!settled && currentFingerCount > lastFingerCount) {
5566            // Additional pointers have gone down but not yet settled.
5567            // Reset the gesture.
5568#if DEBUG_GESTURES
5569            ALOGD("Gestures: Resetting gesture since additional pointers went down for MULTITOUCH, "
5570                    "settle time remaining %0.3fms", (mPointerGesture.firstTouchTime
5571                            + mConfig.pointerGestureMultitouchSettleInterval - when)
5572                            * 0.000001f);
5573#endif
5574            *outCancelPreviousGesture = true;
5575        } else {
5576            // Continue previous gesture.
5577            mPointerGesture.currentGestureMode = mPointerGesture.lastGestureMode;
5578        }
5579
5580        if (*outFinishPreviousGesture || *outCancelPreviousGesture) {
5581            mPointerGesture.currentGestureMode = PointerGesture::PRESS;
5582            mPointerGesture.activeGestureId = 0;
5583            mPointerGesture.referenceIdBits.clear();
5584            mPointerVelocityControl.reset();
5585
5586            // Use the centroid and pointer location as the reference points for the gesture.
5587#if DEBUG_GESTURES
5588            ALOGD("Gestures: Using centroid as reference for MULTITOUCH, "
5589                    "settle time remaining %0.3fms", (mPointerGesture.firstTouchTime
5590                            + mConfig.pointerGestureMultitouchSettleInterval - when)
5591                            * 0.000001f);
5592#endif
5593            mCurrentRawState.rawPointerData.getCentroidOfTouchingPointers(
5594                    &mPointerGesture.referenceTouchX,
5595                    &mPointerGesture.referenceTouchY);
5596            mPointerController->getPosition(&mPointerGesture.referenceGestureX,
5597                    &mPointerGesture.referenceGestureY);
5598        }
5599
5600        // Clear the reference deltas for fingers not yet included in the reference calculation.
5601        for (BitSet32 idBits(mCurrentCookedState.fingerIdBits.value
5602                & ~mPointerGesture.referenceIdBits.value); !idBits.isEmpty(); ) {
5603            uint32_t id = idBits.clearFirstMarkedBit();
5604            mPointerGesture.referenceDeltas[id].dx = 0;
5605            mPointerGesture.referenceDeltas[id].dy = 0;
5606        }
5607        mPointerGesture.referenceIdBits = mCurrentCookedState.fingerIdBits;
5608
5609        // Add delta for all fingers and calculate a common movement delta.
5610        float commonDeltaX = 0, commonDeltaY = 0;
5611        BitSet32 commonIdBits(mLastCookedState.fingerIdBits.value
5612                & mCurrentCookedState.fingerIdBits.value);
5613        for (BitSet32 idBits(commonIdBits); !idBits.isEmpty(); ) {
5614            bool first = (idBits == commonIdBits);
5615            uint32_t id = idBits.clearFirstMarkedBit();
5616            const RawPointerData::Pointer& cpd = mCurrentRawState.rawPointerData.pointerForId(id);
5617            const RawPointerData::Pointer& lpd = mLastRawState.rawPointerData.pointerForId(id);
5618            PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
5619            delta.dx += cpd.x - lpd.x;
5620            delta.dy += cpd.y - lpd.y;
5621
5622            if (first) {
5623                commonDeltaX = delta.dx;
5624                commonDeltaY = delta.dy;
5625            } else {
5626                commonDeltaX = calculateCommonVector(commonDeltaX, delta.dx);
5627                commonDeltaY = calculateCommonVector(commonDeltaY, delta.dy);
5628            }
5629        }
5630
5631        // Consider transitions from PRESS to SWIPE or MULTITOUCH.
5632        if (mPointerGesture.currentGestureMode == PointerGesture::PRESS) {
5633            float dist[MAX_POINTER_ID + 1];
5634            int32_t distOverThreshold = 0;
5635            for (BitSet32 idBits(mPointerGesture.referenceIdBits); !idBits.isEmpty(); ) {
5636                uint32_t id = idBits.clearFirstMarkedBit();
5637                PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
5638                dist[id] = hypotf(delta.dx * mPointerXZoomScale,
5639                        delta.dy * mPointerYZoomScale);
5640                if (dist[id] > mConfig.pointerGestureMultitouchMinDistance) {
5641                    distOverThreshold += 1;
5642                }
5643            }
5644
5645            // Only transition when at least two pointers have moved further than
5646            // the minimum distance threshold.
5647            if (distOverThreshold >= 2) {
5648                if (currentFingerCount > 2) {
5649                    // There are more than two pointers, switch to FREEFORM.
5650#if DEBUG_GESTURES
5651                    ALOGD("Gestures: PRESS transitioned to FREEFORM, number of pointers %d > 2",
5652                            currentFingerCount);
5653#endif
5654                    *outCancelPreviousGesture = true;
5655                    mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5656                } else {
5657                    // There are exactly two pointers.
5658                    BitSet32 idBits(mCurrentCookedState.fingerIdBits);
5659                    uint32_t id1 = idBits.clearFirstMarkedBit();
5660                    uint32_t id2 = idBits.firstMarkedBit();
5661                    const RawPointerData::Pointer& p1 =
5662                            mCurrentRawState.rawPointerData.pointerForId(id1);
5663                    const RawPointerData::Pointer& p2 =
5664                            mCurrentRawState.rawPointerData.pointerForId(id2);
5665                    float mutualDistance = distance(p1.x, p1.y, p2.x, p2.y);
5666                    if (mutualDistance > mPointerGestureMaxSwipeWidth) {
5667                        // There are two pointers but they are too far apart for a SWIPE,
5668                        // switch to FREEFORM.
5669#if DEBUG_GESTURES
5670                        ALOGD("Gestures: PRESS transitioned to FREEFORM, distance %0.3f > %0.3f",
5671                                mutualDistance, mPointerGestureMaxSwipeWidth);
5672#endif
5673                        *outCancelPreviousGesture = true;
5674                        mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5675                    } else {
5676                        // There are two pointers.  Wait for both pointers to start moving
5677                        // before deciding whether this is a SWIPE or FREEFORM gesture.
5678                        float dist1 = dist[id1];
5679                        float dist2 = dist[id2];
5680                        if (dist1 >= mConfig.pointerGestureMultitouchMinDistance
5681                                && dist2 >= mConfig.pointerGestureMultitouchMinDistance) {
5682                            // Calculate the dot product of the displacement vectors.
5683                            // When the vectors are oriented in approximately the same direction,
5684                            // the angle betweeen them is near zero and the cosine of the angle
5685                            // approches 1.0.  Recall that dot(v1, v2) = cos(angle) * mag(v1) * mag(v2).
5686                            PointerGesture::Delta& delta1 = mPointerGesture.referenceDeltas[id1];
5687                            PointerGesture::Delta& delta2 = mPointerGesture.referenceDeltas[id2];
5688                            float dx1 = delta1.dx * mPointerXZoomScale;
5689                            float dy1 = delta1.dy * mPointerYZoomScale;
5690                            float dx2 = delta2.dx * mPointerXZoomScale;
5691                            float dy2 = delta2.dy * mPointerYZoomScale;
5692                            float dot = dx1 * dx2 + dy1 * dy2;
5693                            float cosine = dot / (dist1 * dist2); // denominator always > 0
5694                            if (cosine >= mConfig.pointerGestureSwipeTransitionAngleCosine) {
5695                                // Pointers are moving in the same direction.  Switch to SWIPE.
5696#if DEBUG_GESTURES
5697                                ALOGD("Gestures: PRESS transitioned to SWIPE, "
5698                                        "dist1 %0.3f >= %0.3f, dist2 %0.3f >= %0.3f, "
5699                                        "cosine %0.3f >= %0.3f",
5700                                        dist1, mConfig.pointerGestureMultitouchMinDistance,
5701                                        dist2, mConfig.pointerGestureMultitouchMinDistance,
5702                                        cosine, mConfig.pointerGestureSwipeTransitionAngleCosine);
5703#endif
5704                                mPointerGesture.currentGestureMode = PointerGesture::SWIPE;
5705                            } else {
5706                                // Pointers are moving in different directions.  Switch to FREEFORM.
5707#if DEBUG_GESTURES
5708                                ALOGD("Gestures: PRESS transitioned to FREEFORM, "
5709                                        "dist1 %0.3f >= %0.3f, dist2 %0.3f >= %0.3f, "
5710                                        "cosine %0.3f < %0.3f",
5711                                        dist1, mConfig.pointerGestureMultitouchMinDistance,
5712                                        dist2, mConfig.pointerGestureMultitouchMinDistance,
5713                                        cosine, mConfig.pointerGestureSwipeTransitionAngleCosine);
5714#endif
5715                                *outCancelPreviousGesture = true;
5716                                mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5717                            }
5718                        }
5719                    }
5720                }
5721            }
5722        } else if (mPointerGesture.currentGestureMode == PointerGesture::SWIPE) {
5723            // Switch from SWIPE to FREEFORM if additional pointers go down.
5724            // Cancel previous gesture.
5725            if (currentFingerCount > 2) {
5726#if DEBUG_GESTURES
5727                ALOGD("Gestures: SWIPE transitioned to FREEFORM, number of pointers %d > 2",
5728                        currentFingerCount);
5729#endif
5730                *outCancelPreviousGesture = true;
5731                mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
5732            }
5733        }
5734
5735        // Move the reference points based on the overall group motion of the fingers
5736        // except in PRESS mode while waiting for a transition to occur.
5737        if (mPointerGesture.currentGestureMode != PointerGesture::PRESS
5738                && (commonDeltaX || commonDeltaY)) {
5739            for (BitSet32 idBits(mPointerGesture.referenceIdBits); !idBits.isEmpty(); ) {
5740                uint32_t id = idBits.clearFirstMarkedBit();
5741                PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
5742                delta.dx = 0;
5743                delta.dy = 0;
5744            }
5745
5746            mPointerGesture.referenceTouchX += commonDeltaX;
5747            mPointerGesture.referenceTouchY += commonDeltaY;
5748
5749            commonDeltaX *= mPointerXMovementScale;
5750            commonDeltaY *= mPointerYMovementScale;
5751
5752            rotateDelta(mSurfaceOrientation, &commonDeltaX, &commonDeltaY);
5753            mPointerVelocityControl.move(when, &commonDeltaX, &commonDeltaY);
5754
5755            mPointerGesture.referenceGestureX += commonDeltaX;
5756            mPointerGesture.referenceGestureY += commonDeltaY;
5757        }
5758
5759        // Report gestures.
5760        if (mPointerGesture.currentGestureMode == PointerGesture::PRESS
5761                || mPointerGesture.currentGestureMode == PointerGesture::SWIPE) {
5762            // PRESS or SWIPE mode.
5763#if DEBUG_GESTURES
5764            ALOGD("Gestures: PRESS or SWIPE activeTouchId=%d,"
5765                    "activeGestureId=%d, currentTouchPointerCount=%d",
5766                    activeTouchId, mPointerGesture.activeGestureId, currentFingerCount);
5767#endif
5768            ALOG_ASSERT(mPointerGesture.activeGestureId >= 0);
5769
5770            mPointerGesture.currentGestureIdBits.clear();
5771            mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
5772            mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
5773            mPointerGesture.currentGestureProperties[0].clear();
5774            mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
5775            mPointerGesture.currentGestureProperties[0].toolType =
5776                    AMOTION_EVENT_TOOL_TYPE_FINGER;
5777            mPointerGesture.currentGestureCoords[0].clear();
5778            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X,
5779                    mPointerGesture.referenceGestureX);
5780            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y,
5781                    mPointerGesture.referenceGestureY);
5782            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X,
5783                    commonDeltaX);
5784            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y,
5785                    commonDeltaY);
5786            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5787        } else if (mPointerGesture.currentGestureMode == PointerGesture::FREEFORM) {
5788            // FREEFORM mode.
5789#if DEBUG_GESTURES
5790            ALOGD("Gestures: FREEFORM activeTouchId=%d,"
5791                    "activeGestureId=%d, currentTouchPointerCount=%d",
5792                    activeTouchId, mPointerGesture.activeGestureId, currentFingerCount);
5793#endif
5794            ALOG_ASSERT(mPointerGesture.activeGestureId >= 0);
5795
5796            mPointerGesture.currentGestureIdBits.clear();
5797
5798            BitSet32 mappedTouchIdBits;
5799            BitSet32 usedGestureIdBits;
5800            if (mPointerGesture.lastGestureMode != PointerGesture::FREEFORM) {
5801                // Initially, assign the active gesture id to the active touch point
5802                // if there is one.  No other touch id bits are mapped yet.
5803                if (!*outCancelPreviousGesture) {
5804                    mappedTouchIdBits.markBit(activeTouchId);
5805                    usedGestureIdBits.markBit(mPointerGesture.activeGestureId);
5806                    mPointerGesture.freeformTouchToGestureIdMap[activeTouchId] =
5807                            mPointerGesture.activeGestureId;
5808                } else {
5809                    mPointerGesture.activeGestureId = -1;
5810                }
5811            } else {
5812                // Otherwise, assume we mapped all touches from the previous frame.
5813                // Reuse all mappings that are still applicable.
5814                mappedTouchIdBits.value = mLastCookedState.fingerIdBits.value
5815                        & mCurrentCookedState.fingerIdBits.value;
5816                usedGestureIdBits = mPointerGesture.lastGestureIdBits;
5817
5818                // Check whether we need to choose a new active gesture id because the
5819                // current went went up.
5820                for (BitSet32 upTouchIdBits(mLastCookedState.fingerIdBits.value
5821                        & ~mCurrentCookedState.fingerIdBits.value);
5822                        !upTouchIdBits.isEmpty(); ) {
5823                    uint32_t upTouchId = upTouchIdBits.clearFirstMarkedBit();
5824                    uint32_t upGestureId = mPointerGesture.freeformTouchToGestureIdMap[upTouchId];
5825                    if (upGestureId == uint32_t(mPointerGesture.activeGestureId)) {
5826                        mPointerGesture.activeGestureId = -1;
5827                        break;
5828                    }
5829                }
5830            }
5831
5832#if DEBUG_GESTURES
5833            ALOGD("Gestures: FREEFORM follow up "
5834                    "mappedTouchIdBits=0x%08x, usedGestureIdBits=0x%08x, "
5835                    "activeGestureId=%d",
5836                    mappedTouchIdBits.value, usedGestureIdBits.value,
5837                    mPointerGesture.activeGestureId);
5838#endif
5839
5840            BitSet32 idBits(mCurrentCookedState.fingerIdBits);
5841            for (uint32_t i = 0; i < currentFingerCount; i++) {
5842                uint32_t touchId = idBits.clearFirstMarkedBit();
5843                uint32_t gestureId;
5844                if (!mappedTouchIdBits.hasBit(touchId)) {
5845                    gestureId = usedGestureIdBits.markFirstUnmarkedBit();
5846                    mPointerGesture.freeformTouchToGestureIdMap[touchId] = gestureId;
5847#if DEBUG_GESTURES
5848                    ALOGD("Gestures: FREEFORM "
5849                            "new mapping for touch id %d -> gesture id %d",
5850                            touchId, gestureId);
5851#endif
5852                } else {
5853                    gestureId = mPointerGesture.freeformTouchToGestureIdMap[touchId];
5854#if DEBUG_GESTURES
5855                    ALOGD("Gestures: FREEFORM "
5856                            "existing mapping for touch id %d -> gesture id %d",
5857                            touchId, gestureId);
5858#endif
5859                }
5860                mPointerGesture.currentGestureIdBits.markBit(gestureId);
5861                mPointerGesture.currentGestureIdToIndex[gestureId] = i;
5862
5863                const RawPointerData::Pointer& pointer =
5864                        mCurrentRawState.rawPointerData.pointerForId(touchId);
5865                float deltaX = (pointer.x - mPointerGesture.referenceTouchX)
5866                        * mPointerXZoomScale;
5867                float deltaY = (pointer.y - mPointerGesture.referenceTouchY)
5868                        * mPointerYZoomScale;
5869                rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5870
5871                mPointerGesture.currentGestureProperties[i].clear();
5872                mPointerGesture.currentGestureProperties[i].id = gestureId;
5873                mPointerGesture.currentGestureProperties[i].toolType =
5874                        AMOTION_EVENT_TOOL_TYPE_FINGER;
5875                mPointerGesture.currentGestureCoords[i].clear();
5876                mPointerGesture.currentGestureCoords[i].setAxisValue(
5877                        AMOTION_EVENT_AXIS_X, mPointerGesture.referenceGestureX + deltaX);
5878                mPointerGesture.currentGestureCoords[i].setAxisValue(
5879                        AMOTION_EVENT_AXIS_Y, mPointerGesture.referenceGestureY + deltaY);
5880                mPointerGesture.currentGestureCoords[i].setAxisValue(
5881                        AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
5882                mPointerGesture.currentGestureCoords[i].setAxisValue(
5883                        AMOTION_EVENT_AXIS_RELATIVE_X, deltaX);
5884                mPointerGesture.currentGestureCoords[i].setAxisValue(
5885                        AMOTION_EVENT_AXIS_RELATIVE_Y, deltaY);
5886            }
5887
5888            if (mPointerGesture.activeGestureId < 0) {
5889                mPointerGesture.activeGestureId =
5890                        mPointerGesture.currentGestureIdBits.firstMarkedBit();
5891#if DEBUG_GESTURES
5892                ALOGD("Gestures: FREEFORM new "
5893                        "activeGestureId=%d", mPointerGesture.activeGestureId);
5894#endif
5895            }
5896        }
5897    }
5898
5899    mPointerController->setButtonState(mCurrentRawState.buttonState);
5900
5901#if DEBUG_GESTURES
5902    ALOGD("Gestures: finishPreviousGesture=%s, cancelPreviousGesture=%s, "
5903            "currentGestureMode=%d, currentGestureIdBits=0x%08x, "
5904            "lastGestureMode=%d, lastGestureIdBits=0x%08x",
5905            toString(*outFinishPreviousGesture), toString(*outCancelPreviousGesture),
5906            mPointerGesture.currentGestureMode, mPointerGesture.currentGestureIdBits.value,
5907            mPointerGesture.lastGestureMode, mPointerGesture.lastGestureIdBits.value);
5908    for (BitSet32 idBits = mPointerGesture.currentGestureIdBits; !idBits.isEmpty(); ) {
5909        uint32_t id = idBits.clearFirstMarkedBit();
5910        uint32_t index = mPointerGesture.currentGestureIdToIndex[id];
5911        const PointerProperties& properties = mPointerGesture.currentGestureProperties[index];
5912        const PointerCoords& coords = mPointerGesture.currentGestureCoords[index];
5913        ALOGD("  currentGesture[%d]: index=%d, toolType=%d, "
5914                "x=%0.3f, y=%0.3f, pressure=%0.3f",
5915                id, index, properties.toolType,
5916                coords.getAxisValue(AMOTION_EVENT_AXIS_X),
5917                coords.getAxisValue(AMOTION_EVENT_AXIS_Y),
5918                coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
5919    }
5920    for (BitSet32 idBits = mPointerGesture.lastGestureIdBits; !idBits.isEmpty(); ) {
5921        uint32_t id = idBits.clearFirstMarkedBit();
5922        uint32_t index = mPointerGesture.lastGestureIdToIndex[id];
5923        const PointerProperties& properties = mPointerGesture.lastGestureProperties[index];
5924        const PointerCoords& coords = mPointerGesture.lastGestureCoords[index];
5925        ALOGD("  lastGesture[%d]: index=%d, toolType=%d, "
5926                "x=%0.3f, y=%0.3f, pressure=%0.3f",
5927                id, index, properties.toolType,
5928                coords.getAxisValue(AMOTION_EVENT_AXIS_X),
5929                coords.getAxisValue(AMOTION_EVENT_AXIS_Y),
5930                coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
5931    }
5932#endif
5933    return true;
5934}
5935
5936void TouchInputMapper::dispatchPointerStylus(nsecs_t when, uint32_t policyFlags) {
5937    mPointerSimple.currentCoords.clear();
5938    mPointerSimple.currentProperties.clear();
5939
5940    bool down, hovering;
5941    if (!mCurrentCookedState.stylusIdBits.isEmpty()) {
5942        uint32_t id = mCurrentCookedState.stylusIdBits.firstMarkedBit();
5943        uint32_t index = mCurrentCookedState.cookedPointerData.idToIndex[id];
5944        float x = mCurrentCookedState.cookedPointerData.pointerCoords[index].getX();
5945        float y = mCurrentCookedState.cookedPointerData.pointerCoords[index].getY();
5946        mPointerController->setPosition(x, y);
5947
5948        hovering = mCurrentCookedState.cookedPointerData.hoveringIdBits.hasBit(id);
5949        down = !hovering;
5950
5951        mPointerController->getPosition(&x, &y);
5952        mPointerSimple.currentCoords.copyFrom(
5953                mCurrentCookedState.cookedPointerData.pointerCoords[index]);
5954        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
5955        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
5956        mPointerSimple.currentProperties.id = 0;
5957        mPointerSimple.currentProperties.toolType =
5958                mCurrentCookedState.cookedPointerData.pointerProperties[index].toolType;
5959    } else {
5960        down = false;
5961        hovering = false;
5962    }
5963
5964    dispatchPointerSimple(when, policyFlags, down, hovering);
5965}
5966
5967void TouchInputMapper::abortPointerStylus(nsecs_t when, uint32_t policyFlags) {
5968    abortPointerSimple(when, policyFlags);
5969}
5970
5971void TouchInputMapper::dispatchPointerMouse(nsecs_t when, uint32_t policyFlags) {
5972    mPointerSimple.currentCoords.clear();
5973    mPointerSimple.currentProperties.clear();
5974
5975    bool down, hovering;
5976    if (!mCurrentCookedState.mouseIdBits.isEmpty()) {
5977        uint32_t id = mCurrentCookedState.mouseIdBits.firstMarkedBit();
5978        uint32_t currentIndex = mCurrentRawState.rawPointerData.idToIndex[id];
5979        float deltaX = 0, deltaY = 0;
5980        if (mLastCookedState.mouseIdBits.hasBit(id)) {
5981            uint32_t lastIndex = mCurrentRawState.rawPointerData.idToIndex[id];
5982            deltaX = (mCurrentRawState.rawPointerData.pointers[currentIndex].x
5983                    - mLastRawState.rawPointerData.pointers[lastIndex].x)
5984                    * mPointerXMovementScale;
5985            deltaY = (mCurrentRawState.rawPointerData.pointers[currentIndex].y
5986                    - mLastRawState.rawPointerData.pointers[lastIndex].y)
5987                    * mPointerYMovementScale;
5988
5989            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
5990            mPointerVelocityControl.move(when, &deltaX, &deltaY);
5991
5992            mPointerController->move(deltaX, deltaY);
5993        } else {
5994            mPointerVelocityControl.reset();
5995        }
5996
5997        down = isPointerDown(mCurrentRawState.buttonState);
5998        hovering = !down;
5999
6000        float x, y;
6001        mPointerController->getPosition(&x, &y);
6002        mPointerSimple.currentCoords.copyFrom(
6003                mCurrentCookedState.cookedPointerData.pointerCoords[currentIndex]);
6004        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
6005        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
6006        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
6007                hovering ? 0.0f : 1.0f);
6008        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X, x);
6009        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y, y);
6010        mPointerSimple.currentProperties.id = 0;
6011        mPointerSimple.currentProperties.toolType =
6012                mCurrentCookedState.cookedPointerData.pointerProperties[currentIndex].toolType;
6013    } else {
6014        mPointerVelocityControl.reset();
6015
6016        down = false;
6017        hovering = false;
6018    }
6019
6020    dispatchPointerSimple(when, policyFlags, down, hovering);
6021}
6022
6023void TouchInputMapper::abortPointerMouse(nsecs_t when, uint32_t policyFlags) {
6024    abortPointerSimple(when, policyFlags);
6025
6026    mPointerVelocityControl.reset();
6027}
6028
6029void TouchInputMapper::dispatchPointerSimple(nsecs_t when, uint32_t policyFlags,
6030        bool down, bool hovering) {
6031    int32_t metaState = getContext()->getGlobalMetaState();
6032
6033    if (mPointerController != NULL) {
6034        if (down || hovering) {
6035            mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
6036            mPointerController->clearSpots();
6037            mPointerController->setButtonState(mCurrentRawState.buttonState);
6038            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
6039        } else if (!down && !hovering && (mPointerSimple.down || mPointerSimple.hovering)) {
6040            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
6041        }
6042    }
6043
6044    if (mPointerSimple.down && !down) {
6045        mPointerSimple.down = false;
6046
6047        // Send up.
6048        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
6049                 AMOTION_EVENT_ACTION_UP, 0, 0, metaState, mLastRawState.buttonState, 0,
6050                 mViewport.displayId,
6051                 1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
6052                 mOrientedXPrecision, mOrientedYPrecision,
6053                 mPointerSimple.downTime);
6054        getListener()->notifyMotion(&args);
6055    }
6056
6057    if (mPointerSimple.hovering && !hovering) {
6058        mPointerSimple.hovering = false;
6059
6060        // Send hover exit.
6061        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
6062                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState, mLastRawState.buttonState, 0,
6063                mViewport.displayId,
6064                1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
6065                mOrientedXPrecision, mOrientedYPrecision,
6066                mPointerSimple.downTime);
6067        getListener()->notifyMotion(&args);
6068    }
6069
6070    if (down) {
6071        if (!mPointerSimple.down) {
6072            mPointerSimple.down = true;
6073            mPointerSimple.downTime = when;
6074
6075            // Send down.
6076            NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
6077                    AMOTION_EVENT_ACTION_DOWN, 0, 0, metaState, mCurrentRawState.buttonState, 0,
6078                    mViewport.displayId,
6079                    1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
6080                    mOrientedXPrecision, mOrientedYPrecision,
6081                    mPointerSimple.downTime);
6082            getListener()->notifyMotion(&args);
6083        }
6084
6085        // Send move.
6086        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
6087                AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, mCurrentRawState.buttonState, 0,
6088                mViewport.displayId,
6089                1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
6090                mOrientedXPrecision, mOrientedYPrecision,
6091                mPointerSimple.downTime);
6092        getListener()->notifyMotion(&args);
6093    }
6094
6095    if (hovering) {
6096        if (!mPointerSimple.hovering) {
6097            mPointerSimple.hovering = true;
6098
6099            // Send hover enter.
6100            NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
6101                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, 0, metaState,
6102                    mCurrentRawState.buttonState, 0,
6103                    mViewport.displayId,
6104                    1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
6105                    mOrientedXPrecision, mOrientedYPrecision,
6106                    mPointerSimple.downTime);
6107            getListener()->notifyMotion(&args);
6108        }
6109
6110        // Send hover move.
6111        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
6112                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
6113                mCurrentRawState.buttonState, 0,
6114                mViewport.displayId,
6115                1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
6116                mOrientedXPrecision, mOrientedYPrecision,
6117                mPointerSimple.downTime);
6118        getListener()->notifyMotion(&args);
6119    }
6120
6121    if (mCurrentRawState.rawVScroll || mCurrentRawState.rawHScroll) {
6122        float vscroll = mCurrentRawState.rawVScroll;
6123        float hscroll = mCurrentRawState.rawHScroll;
6124        mWheelYVelocityControl.move(when, NULL, &vscroll);
6125        mWheelXVelocityControl.move(when, &hscroll, NULL);
6126
6127        // Send scroll.
6128        PointerCoords pointerCoords;
6129        pointerCoords.copyFrom(mPointerSimple.currentCoords);
6130        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
6131        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
6132
6133        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
6134                AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, mCurrentRawState.buttonState, 0,
6135                mViewport.displayId,
6136                1, &mPointerSimple.currentProperties, &pointerCoords,
6137                mOrientedXPrecision, mOrientedYPrecision,
6138                mPointerSimple.downTime);
6139        getListener()->notifyMotion(&args);
6140    }
6141
6142    // Save state.
6143    if (down || hovering) {
6144        mPointerSimple.lastCoords.copyFrom(mPointerSimple.currentCoords);
6145        mPointerSimple.lastProperties.copyFrom(mPointerSimple.currentProperties);
6146    } else {
6147        mPointerSimple.reset();
6148    }
6149}
6150
6151void TouchInputMapper::abortPointerSimple(nsecs_t when, uint32_t policyFlags) {
6152    mPointerSimple.currentCoords.clear();
6153    mPointerSimple.currentProperties.clear();
6154
6155    dispatchPointerSimple(when, policyFlags, false, false);
6156}
6157
6158void TouchInputMapper::dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
6159        int32_t action, int32_t actionButton, int32_t flags,
6160        int32_t metaState, int32_t buttonState, int32_t edgeFlags,
6161        const PointerProperties* properties, const PointerCoords* coords,
6162        const uint32_t* idToIndex, BitSet32 idBits, int32_t changedId,
6163        float xPrecision, float yPrecision, nsecs_t downTime) {
6164    PointerCoords pointerCoords[MAX_POINTERS];
6165    PointerProperties pointerProperties[MAX_POINTERS];
6166    uint32_t pointerCount = 0;
6167    while (!idBits.isEmpty()) {
6168        uint32_t id = idBits.clearFirstMarkedBit();
6169        uint32_t index = idToIndex[id];
6170        pointerProperties[pointerCount].copyFrom(properties[index]);
6171        pointerCoords[pointerCount].copyFrom(coords[index]);
6172
6173        if (changedId >= 0 && id == uint32_t(changedId)) {
6174            action |= pointerCount << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
6175        }
6176
6177        pointerCount += 1;
6178    }
6179
6180    ALOG_ASSERT(pointerCount != 0);
6181
6182    if (changedId >= 0 && pointerCount == 1) {
6183        // Replace initial down and final up action.
6184        // We can compare the action without masking off the changed pointer index
6185        // because we know the index is 0.
6186        if (action == AMOTION_EVENT_ACTION_POINTER_DOWN) {
6187            action = AMOTION_EVENT_ACTION_DOWN;
6188        } else if (action == AMOTION_EVENT_ACTION_POINTER_UP) {
6189            action = AMOTION_EVENT_ACTION_UP;
6190        } else {
6191            // Can't happen.
6192            ALOG_ASSERT(false);
6193        }
6194    }
6195
6196    NotifyMotionArgs args(when, getDeviceId(), source, policyFlags,
6197            action, actionButton, flags, metaState, buttonState, edgeFlags,
6198            mViewport.displayId, pointerCount, pointerProperties, pointerCoords,
6199            xPrecision, yPrecision, downTime);
6200    getListener()->notifyMotion(&args);
6201}
6202
6203bool TouchInputMapper::updateMovedPointers(const PointerProperties* inProperties,
6204        const PointerCoords* inCoords, const uint32_t* inIdToIndex,
6205        PointerProperties* outProperties, PointerCoords* outCoords, const uint32_t* outIdToIndex,
6206        BitSet32 idBits) const {
6207    bool changed = false;
6208    while (!idBits.isEmpty()) {
6209        uint32_t id = idBits.clearFirstMarkedBit();
6210        uint32_t inIndex = inIdToIndex[id];
6211        uint32_t outIndex = outIdToIndex[id];
6212
6213        const PointerProperties& curInProperties = inProperties[inIndex];
6214        const PointerCoords& curInCoords = inCoords[inIndex];
6215        PointerProperties& curOutProperties = outProperties[outIndex];
6216        PointerCoords& curOutCoords = outCoords[outIndex];
6217
6218        if (curInProperties != curOutProperties) {
6219            curOutProperties.copyFrom(curInProperties);
6220            changed = true;
6221        }
6222
6223        if (curInCoords != curOutCoords) {
6224            curOutCoords.copyFrom(curInCoords);
6225            changed = true;
6226        }
6227    }
6228    return changed;
6229}
6230
6231void TouchInputMapper::fadePointer() {
6232    if (mPointerController != NULL) {
6233        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
6234    }
6235}
6236
6237void TouchInputMapper::cancelTouch(nsecs_t when) {
6238    abortPointerUsage(when, 0 /*policyFlags*/);
6239    abortTouches(when, 0 /* policyFlags*/);
6240}
6241
6242bool TouchInputMapper::isPointInsideSurface(int32_t x, int32_t y) {
6243    return x >= mRawPointerAxes.x.minValue && x <= mRawPointerAxes.x.maxValue
6244            && y >= mRawPointerAxes.y.minValue && y <= mRawPointerAxes.y.maxValue;
6245}
6246
6247const TouchInputMapper::VirtualKey* TouchInputMapper::findVirtualKeyHit(
6248        int32_t x, int32_t y) {
6249    size_t numVirtualKeys = mVirtualKeys.size();
6250    for (size_t i = 0; i < numVirtualKeys; i++) {
6251        const VirtualKey& virtualKey = mVirtualKeys[i];
6252
6253#if DEBUG_VIRTUAL_KEYS
6254        ALOGD("VirtualKeys: Hit test (%d, %d): keyCode=%d, scanCode=%d, "
6255                "left=%d, top=%d, right=%d, bottom=%d",
6256                x, y,
6257                virtualKey.keyCode, virtualKey.scanCode,
6258                virtualKey.hitLeft, virtualKey.hitTop,
6259                virtualKey.hitRight, virtualKey.hitBottom);
6260#endif
6261
6262        if (virtualKey.isHit(x, y)) {
6263            return & virtualKey;
6264        }
6265    }
6266
6267    return NULL;
6268}
6269
6270void TouchInputMapper::assignPointerIds(const RawState* last, RawState* current) {
6271    uint32_t currentPointerCount = current->rawPointerData.pointerCount;
6272    uint32_t lastPointerCount = last->rawPointerData.pointerCount;
6273
6274    current->rawPointerData.clearIdBits();
6275
6276    if (currentPointerCount == 0) {
6277        // No pointers to assign.
6278        return;
6279    }
6280
6281    if (lastPointerCount == 0) {
6282        // All pointers are new.
6283        for (uint32_t i = 0; i < currentPointerCount; i++) {
6284            uint32_t id = i;
6285            current->rawPointerData.pointers[i].id = id;
6286            current->rawPointerData.idToIndex[id] = i;
6287            current->rawPointerData.markIdBit(id, current->rawPointerData.isHovering(i));
6288        }
6289        return;
6290    }
6291
6292    if (currentPointerCount == 1 && lastPointerCount == 1
6293            && current->rawPointerData.pointers[0].toolType
6294                    == last->rawPointerData.pointers[0].toolType) {
6295        // Only one pointer and no change in count so it must have the same id as before.
6296        uint32_t id = last->rawPointerData.pointers[0].id;
6297        current->rawPointerData.pointers[0].id = id;
6298        current->rawPointerData.idToIndex[id] = 0;
6299        current->rawPointerData.markIdBit(id, current->rawPointerData.isHovering(0));
6300        return;
6301    }
6302
6303    // General case.
6304    // We build a heap of squared euclidean distances between current and last pointers
6305    // associated with the current and last pointer indices.  Then, we find the best
6306    // match (by distance) for each current pointer.
6307    // The pointers must have the same tool type but it is possible for them to
6308    // transition from hovering to touching or vice-versa while retaining the same id.
6309    PointerDistanceHeapElement heap[MAX_POINTERS * MAX_POINTERS];
6310
6311    uint32_t heapSize = 0;
6312    for (uint32_t currentPointerIndex = 0; currentPointerIndex < currentPointerCount;
6313            currentPointerIndex++) {
6314        for (uint32_t lastPointerIndex = 0; lastPointerIndex < lastPointerCount;
6315                lastPointerIndex++) {
6316            const RawPointerData::Pointer& currentPointer =
6317                    current->rawPointerData.pointers[currentPointerIndex];
6318            const RawPointerData::Pointer& lastPointer =
6319                    last->rawPointerData.pointers[lastPointerIndex];
6320            if (currentPointer.toolType == lastPointer.toolType) {
6321                int64_t deltaX = currentPointer.x - lastPointer.x;
6322                int64_t deltaY = currentPointer.y - lastPointer.y;
6323
6324                uint64_t distance = uint64_t(deltaX * deltaX + deltaY * deltaY);
6325
6326                // Insert new element into the heap (sift up).
6327                heap[heapSize].currentPointerIndex = currentPointerIndex;
6328                heap[heapSize].lastPointerIndex = lastPointerIndex;
6329                heap[heapSize].distance = distance;
6330                heapSize += 1;
6331            }
6332        }
6333    }
6334
6335    // Heapify
6336    for (uint32_t startIndex = heapSize / 2; startIndex != 0; ) {
6337        startIndex -= 1;
6338        for (uint32_t parentIndex = startIndex; ;) {
6339            uint32_t childIndex = parentIndex * 2 + 1;
6340            if (childIndex >= heapSize) {
6341                break;
6342            }
6343
6344            if (childIndex + 1 < heapSize
6345                    && heap[childIndex + 1].distance < heap[childIndex].distance) {
6346                childIndex += 1;
6347            }
6348
6349            if (heap[parentIndex].distance <= heap[childIndex].distance) {
6350                break;
6351            }
6352
6353            swap(heap[parentIndex], heap[childIndex]);
6354            parentIndex = childIndex;
6355        }
6356    }
6357
6358#if DEBUG_POINTER_ASSIGNMENT
6359    ALOGD("assignPointerIds - initial distance min-heap: size=%d", heapSize);
6360    for (size_t i = 0; i < heapSize; i++) {
6361        ALOGD("  heap[%d]: cur=%d, last=%d, distance=%lld",
6362                i, heap[i].currentPointerIndex, heap[i].lastPointerIndex,
6363                heap[i].distance);
6364    }
6365#endif
6366
6367    // Pull matches out by increasing order of distance.
6368    // To avoid reassigning pointers that have already been matched, the loop keeps track
6369    // of which last and current pointers have been matched using the matchedXXXBits variables.
6370    // It also tracks the used pointer id bits.
6371    BitSet32 matchedLastBits(0);
6372    BitSet32 matchedCurrentBits(0);
6373    BitSet32 usedIdBits(0);
6374    bool first = true;
6375    for (uint32_t i = min(currentPointerCount, lastPointerCount); heapSize > 0 && i > 0; i--) {
6376        while (heapSize > 0) {
6377            if (first) {
6378                // The first time through the loop, we just consume the root element of
6379                // the heap (the one with smallest distance).
6380                first = false;
6381            } else {
6382                // Previous iterations consumed the root element of the heap.
6383                // Pop root element off of the heap (sift down).
6384                heap[0] = heap[heapSize];
6385                for (uint32_t parentIndex = 0; ;) {
6386                    uint32_t childIndex = parentIndex * 2 + 1;
6387                    if (childIndex >= heapSize) {
6388                        break;
6389                    }
6390
6391                    if (childIndex + 1 < heapSize
6392                            && heap[childIndex + 1].distance < heap[childIndex].distance) {
6393                        childIndex += 1;
6394                    }
6395
6396                    if (heap[parentIndex].distance <= heap[childIndex].distance) {
6397                        break;
6398                    }
6399
6400                    swap(heap[parentIndex], heap[childIndex]);
6401                    parentIndex = childIndex;
6402                }
6403
6404#if DEBUG_POINTER_ASSIGNMENT
6405                ALOGD("assignPointerIds - reduced distance min-heap: size=%d", heapSize);
6406                for (size_t i = 0; i < heapSize; i++) {
6407                    ALOGD("  heap[%d]: cur=%d, last=%d, distance=%lld",
6408                            i, heap[i].currentPointerIndex, heap[i].lastPointerIndex,
6409                            heap[i].distance);
6410                }
6411#endif
6412            }
6413
6414            heapSize -= 1;
6415
6416            uint32_t currentPointerIndex = heap[0].currentPointerIndex;
6417            if (matchedCurrentBits.hasBit(currentPointerIndex)) continue; // already matched
6418
6419            uint32_t lastPointerIndex = heap[0].lastPointerIndex;
6420            if (matchedLastBits.hasBit(lastPointerIndex)) continue; // already matched
6421
6422            matchedCurrentBits.markBit(currentPointerIndex);
6423            matchedLastBits.markBit(lastPointerIndex);
6424
6425            uint32_t id = last->rawPointerData.pointers[lastPointerIndex].id;
6426            current->rawPointerData.pointers[currentPointerIndex].id = id;
6427            current->rawPointerData.idToIndex[id] = currentPointerIndex;
6428            current->rawPointerData.markIdBit(id,
6429                    current->rawPointerData.isHovering(currentPointerIndex));
6430            usedIdBits.markBit(id);
6431
6432#if DEBUG_POINTER_ASSIGNMENT
6433            ALOGD("assignPointerIds - matched: cur=%d, last=%d, id=%d, distance=%lld",
6434                    lastPointerIndex, currentPointerIndex, id, heap[0].distance);
6435#endif
6436            break;
6437        }
6438    }
6439
6440    // Assign fresh ids to pointers that were not matched in the process.
6441    for (uint32_t i = currentPointerCount - matchedCurrentBits.count(); i != 0; i--) {
6442        uint32_t currentPointerIndex = matchedCurrentBits.markFirstUnmarkedBit();
6443        uint32_t id = usedIdBits.markFirstUnmarkedBit();
6444
6445        current->rawPointerData.pointers[currentPointerIndex].id = id;
6446        current->rawPointerData.idToIndex[id] = currentPointerIndex;
6447        current->rawPointerData.markIdBit(id,
6448                current->rawPointerData.isHovering(currentPointerIndex));
6449
6450#if DEBUG_POINTER_ASSIGNMENT
6451        ALOGD("assignPointerIds - assigned: cur=%d, id=%d",
6452                currentPointerIndex, id);
6453#endif
6454    }
6455}
6456
6457int32_t TouchInputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
6458    if (mCurrentVirtualKey.down && mCurrentVirtualKey.keyCode == keyCode) {
6459        return AKEY_STATE_VIRTUAL;
6460    }
6461
6462    size_t numVirtualKeys = mVirtualKeys.size();
6463    for (size_t i = 0; i < numVirtualKeys; i++) {
6464        const VirtualKey& virtualKey = mVirtualKeys[i];
6465        if (virtualKey.keyCode == keyCode) {
6466            return AKEY_STATE_UP;
6467        }
6468    }
6469
6470    return AKEY_STATE_UNKNOWN;
6471}
6472
6473int32_t TouchInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
6474    if (mCurrentVirtualKey.down && mCurrentVirtualKey.scanCode == scanCode) {
6475        return AKEY_STATE_VIRTUAL;
6476    }
6477
6478    size_t numVirtualKeys = mVirtualKeys.size();
6479    for (size_t i = 0; i < numVirtualKeys; i++) {
6480        const VirtualKey& virtualKey = mVirtualKeys[i];
6481        if (virtualKey.scanCode == scanCode) {
6482            return AKEY_STATE_UP;
6483        }
6484    }
6485
6486    return AKEY_STATE_UNKNOWN;
6487}
6488
6489bool TouchInputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
6490        const int32_t* keyCodes, uint8_t* outFlags) {
6491    size_t numVirtualKeys = mVirtualKeys.size();
6492    for (size_t i = 0; i < numVirtualKeys; i++) {
6493        const VirtualKey& virtualKey = mVirtualKeys[i];
6494
6495        for (size_t i = 0; i < numCodes; i++) {
6496            if (virtualKey.keyCode == keyCodes[i]) {
6497                outFlags[i] = 1;
6498            }
6499        }
6500    }
6501
6502    return true;
6503}
6504
6505
6506// --- SingleTouchInputMapper ---
6507
6508SingleTouchInputMapper::SingleTouchInputMapper(InputDevice* device) :
6509        TouchInputMapper(device) {
6510}
6511
6512SingleTouchInputMapper::~SingleTouchInputMapper() {
6513}
6514
6515void SingleTouchInputMapper::reset(nsecs_t when) {
6516    mSingleTouchMotionAccumulator.reset(getDevice());
6517
6518    TouchInputMapper::reset(when);
6519}
6520
6521void SingleTouchInputMapper::process(const RawEvent* rawEvent) {
6522    TouchInputMapper::process(rawEvent);
6523
6524    mSingleTouchMotionAccumulator.process(rawEvent);
6525}
6526
6527void SingleTouchInputMapper::syncTouch(nsecs_t when, RawState* outState) {
6528    if (mTouchButtonAccumulator.isToolActive()) {
6529        outState->rawPointerData.pointerCount = 1;
6530        outState->rawPointerData.idToIndex[0] = 0;
6531
6532        bool isHovering = mTouchButtonAccumulator.getToolType() != AMOTION_EVENT_TOOL_TYPE_MOUSE
6533                && (mTouchButtonAccumulator.isHovering()
6534                        || (mRawPointerAxes.pressure.valid
6535                                && mSingleTouchMotionAccumulator.getAbsolutePressure() <= 0));
6536        outState->rawPointerData.markIdBit(0, isHovering);
6537
6538        RawPointerData::Pointer& outPointer = outState->rawPointerData.pointers[0];
6539        outPointer.id = 0;
6540        outPointer.x = mSingleTouchMotionAccumulator.getAbsoluteX();
6541        outPointer.y = mSingleTouchMotionAccumulator.getAbsoluteY();
6542        outPointer.pressure = mSingleTouchMotionAccumulator.getAbsolutePressure();
6543        outPointer.touchMajor = 0;
6544        outPointer.touchMinor = 0;
6545        outPointer.toolMajor = mSingleTouchMotionAccumulator.getAbsoluteToolWidth();
6546        outPointer.toolMinor = mSingleTouchMotionAccumulator.getAbsoluteToolWidth();
6547        outPointer.orientation = 0;
6548        outPointer.distance = mSingleTouchMotionAccumulator.getAbsoluteDistance();
6549        outPointer.tiltX = mSingleTouchMotionAccumulator.getAbsoluteTiltX();
6550        outPointer.tiltY = mSingleTouchMotionAccumulator.getAbsoluteTiltY();
6551        outPointer.toolType = mTouchButtonAccumulator.getToolType();
6552        if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6553            outPointer.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
6554        }
6555        outPointer.isHovering = isHovering;
6556    }
6557}
6558
6559void SingleTouchInputMapper::configureRawPointerAxes() {
6560    TouchInputMapper::configureRawPointerAxes();
6561
6562    getAbsoluteAxisInfo(ABS_X, &mRawPointerAxes.x);
6563    getAbsoluteAxisInfo(ABS_Y, &mRawPointerAxes.y);
6564    getAbsoluteAxisInfo(ABS_PRESSURE, &mRawPointerAxes.pressure);
6565    getAbsoluteAxisInfo(ABS_TOOL_WIDTH, &mRawPointerAxes.toolMajor);
6566    getAbsoluteAxisInfo(ABS_DISTANCE, &mRawPointerAxes.distance);
6567    getAbsoluteAxisInfo(ABS_TILT_X, &mRawPointerAxes.tiltX);
6568    getAbsoluteAxisInfo(ABS_TILT_Y, &mRawPointerAxes.tiltY);
6569}
6570
6571bool SingleTouchInputMapper::hasStylus() const {
6572    return mTouchButtonAccumulator.hasStylus();
6573}
6574
6575
6576// --- MultiTouchInputMapper ---
6577
6578MultiTouchInputMapper::MultiTouchInputMapper(InputDevice* device) :
6579        TouchInputMapper(device) {
6580}
6581
6582MultiTouchInputMapper::~MultiTouchInputMapper() {
6583}
6584
6585void MultiTouchInputMapper::reset(nsecs_t when) {
6586    mMultiTouchMotionAccumulator.reset(getDevice());
6587
6588    mPointerIdBits.clear();
6589
6590    TouchInputMapper::reset(when);
6591}
6592
6593void MultiTouchInputMapper::process(const RawEvent* rawEvent) {
6594    TouchInputMapper::process(rawEvent);
6595
6596    mMultiTouchMotionAccumulator.process(rawEvent);
6597}
6598
6599void MultiTouchInputMapper::syncTouch(nsecs_t when, RawState* outState) {
6600    size_t inCount = mMultiTouchMotionAccumulator.getSlotCount();
6601    size_t outCount = 0;
6602    BitSet32 newPointerIdBits;
6603
6604    for (size_t inIndex = 0; inIndex < inCount; inIndex++) {
6605        const MultiTouchMotionAccumulator::Slot* inSlot =
6606                mMultiTouchMotionAccumulator.getSlot(inIndex);
6607        if (!inSlot->isInUse()) {
6608            continue;
6609        }
6610
6611        if (outCount >= MAX_POINTERS) {
6612#if DEBUG_POINTERS
6613            ALOGD("MultiTouch device %s emitted more than maximum of %d pointers; "
6614                    "ignoring the rest.",
6615                    getDeviceName().string(), MAX_POINTERS);
6616#endif
6617            break; // too many fingers!
6618        }
6619
6620        RawPointerData::Pointer& outPointer = outState->rawPointerData.pointers[outCount];
6621        outPointer.x = inSlot->getX();
6622        outPointer.y = inSlot->getY();
6623        outPointer.pressure = inSlot->getPressure();
6624        outPointer.touchMajor = inSlot->getTouchMajor();
6625        outPointer.touchMinor = inSlot->getTouchMinor();
6626        outPointer.toolMajor = inSlot->getToolMajor();
6627        outPointer.toolMinor = inSlot->getToolMinor();
6628        outPointer.orientation = inSlot->getOrientation();
6629        outPointer.distance = inSlot->getDistance();
6630        outPointer.tiltX = 0;
6631        outPointer.tiltY = 0;
6632
6633        outPointer.toolType = inSlot->getToolType();
6634        if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6635            outPointer.toolType = mTouchButtonAccumulator.getToolType();
6636            if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6637                outPointer.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
6638            }
6639        }
6640
6641        bool isHovering = mTouchButtonAccumulator.getToolType() != AMOTION_EVENT_TOOL_TYPE_MOUSE
6642                && (mTouchButtonAccumulator.isHovering()
6643                        || (mRawPointerAxes.pressure.valid && inSlot->getPressure() <= 0));
6644        outPointer.isHovering = isHovering;
6645
6646        // Assign pointer id using tracking id if available.
6647        mHavePointerIds = true;
6648        int32_t trackingId = inSlot->getTrackingId();
6649        int32_t id = -1;
6650        if (trackingId >= 0) {
6651            for (BitSet32 idBits(mPointerIdBits); !idBits.isEmpty(); ) {
6652                uint32_t n = idBits.clearFirstMarkedBit();
6653                if (mPointerTrackingIdMap[n] == trackingId) {
6654                    id = n;
6655                }
6656            }
6657
6658            if (id < 0 && !mPointerIdBits.isFull()) {
6659                id = mPointerIdBits.markFirstUnmarkedBit();
6660                mPointerTrackingIdMap[id] = trackingId;
6661            }
6662        }
6663        if (id < 0) {
6664            mHavePointerIds = false;
6665            outState->rawPointerData.clearIdBits();
6666            newPointerIdBits.clear();
6667        } else {
6668            outPointer.id = id;
6669            outState->rawPointerData.idToIndex[id] = outCount;
6670            outState->rawPointerData.markIdBit(id, isHovering);
6671            newPointerIdBits.markBit(id);
6672        }
6673
6674        outCount += 1;
6675    }
6676
6677    outState->rawPointerData.pointerCount = outCount;
6678    mPointerIdBits = newPointerIdBits;
6679
6680    mMultiTouchMotionAccumulator.finishSync();
6681}
6682
6683void MultiTouchInputMapper::configureRawPointerAxes() {
6684    TouchInputMapper::configureRawPointerAxes();
6685
6686    getAbsoluteAxisInfo(ABS_MT_POSITION_X, &mRawPointerAxes.x);
6687    getAbsoluteAxisInfo(ABS_MT_POSITION_Y, &mRawPointerAxes.y);
6688    getAbsoluteAxisInfo(ABS_MT_TOUCH_MAJOR, &mRawPointerAxes.touchMajor);
6689    getAbsoluteAxisInfo(ABS_MT_TOUCH_MINOR, &mRawPointerAxes.touchMinor);
6690    getAbsoluteAxisInfo(ABS_MT_WIDTH_MAJOR, &mRawPointerAxes.toolMajor);
6691    getAbsoluteAxisInfo(ABS_MT_WIDTH_MINOR, &mRawPointerAxes.toolMinor);
6692    getAbsoluteAxisInfo(ABS_MT_ORIENTATION, &mRawPointerAxes.orientation);
6693    getAbsoluteAxisInfo(ABS_MT_PRESSURE, &mRawPointerAxes.pressure);
6694    getAbsoluteAxisInfo(ABS_MT_DISTANCE, &mRawPointerAxes.distance);
6695    getAbsoluteAxisInfo(ABS_MT_TRACKING_ID, &mRawPointerAxes.trackingId);
6696    getAbsoluteAxisInfo(ABS_MT_SLOT, &mRawPointerAxes.slot);
6697
6698    if (mRawPointerAxes.trackingId.valid
6699            && mRawPointerAxes.slot.valid
6700            && mRawPointerAxes.slot.minValue == 0 && mRawPointerAxes.slot.maxValue > 0) {
6701        size_t slotCount = mRawPointerAxes.slot.maxValue + 1;
6702        if (slotCount > MAX_SLOTS) {
6703            ALOGW("MultiTouch Device %s reported %zu slots but the framework "
6704                    "only supports a maximum of %zu slots at this time.",
6705                    getDeviceName().string(), slotCount, MAX_SLOTS);
6706            slotCount = MAX_SLOTS;
6707        }
6708        mMultiTouchMotionAccumulator.configure(getDevice(),
6709                slotCount, true /*usingSlotsProtocol*/);
6710    } else {
6711        mMultiTouchMotionAccumulator.configure(getDevice(),
6712                MAX_POINTERS, false /*usingSlotsProtocol*/);
6713    }
6714}
6715
6716bool MultiTouchInputMapper::hasStylus() const {
6717    return mMultiTouchMotionAccumulator.hasStylus()
6718            || mTouchButtonAccumulator.hasStylus();
6719}
6720
6721// --- ExternalStylusInputMapper
6722
6723ExternalStylusInputMapper::ExternalStylusInputMapper(InputDevice* device) :
6724    InputMapper(device) {
6725
6726}
6727
6728uint32_t ExternalStylusInputMapper::getSources() {
6729    return AINPUT_SOURCE_STYLUS;
6730}
6731
6732void ExternalStylusInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
6733    InputMapper::populateDeviceInfo(info);
6734    info->addMotionRange(AMOTION_EVENT_AXIS_PRESSURE, AINPUT_SOURCE_STYLUS,
6735            0.0f, 1.0f, 0.0f, 0.0f, 0.0f);
6736}
6737
6738void ExternalStylusInputMapper::dump(String8& dump) {
6739    dump.append(INDENT2 "External Stylus Input Mapper:\n");
6740    dump.append(INDENT3 "Raw Stylus Axes:\n");
6741    dumpRawAbsoluteAxisInfo(dump, mRawPressureAxis, "Pressure");
6742    dump.append(INDENT3 "Stylus State:\n");
6743    dumpStylusState(dump, mStylusState);
6744}
6745
6746void ExternalStylusInputMapper::configure(nsecs_t when,
6747        const InputReaderConfiguration* config, uint32_t changes) {
6748    getAbsoluteAxisInfo(ABS_PRESSURE, &mRawPressureAxis);
6749    mTouchButtonAccumulator.configure(getDevice());
6750}
6751
6752void ExternalStylusInputMapper::reset(nsecs_t when) {
6753    InputDevice* device = getDevice();
6754    mSingleTouchMotionAccumulator.reset(device);
6755    mTouchButtonAccumulator.reset(device);
6756    InputMapper::reset(when);
6757}
6758
6759void ExternalStylusInputMapper::process(const RawEvent* rawEvent) {
6760    mSingleTouchMotionAccumulator.process(rawEvent);
6761    mTouchButtonAccumulator.process(rawEvent);
6762
6763    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
6764        sync(rawEvent->when);
6765    }
6766}
6767
6768void ExternalStylusInputMapper::sync(nsecs_t when) {
6769    mStylusState.clear();
6770
6771    mStylusState.when = when;
6772
6773    mStylusState.toolType = mTouchButtonAccumulator.getToolType();
6774    if (mStylusState.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
6775        mStylusState.toolType = AMOTION_EVENT_TOOL_TYPE_STYLUS;
6776    }
6777
6778    int32_t pressure = mSingleTouchMotionAccumulator.getAbsolutePressure();
6779    if (mRawPressureAxis.valid) {
6780        mStylusState.pressure = float(pressure) / mRawPressureAxis.maxValue;
6781    } else if (mTouchButtonAccumulator.isToolActive()) {
6782        mStylusState.pressure = 1.0f;
6783    } else {
6784        mStylusState.pressure = 0.0f;
6785    }
6786
6787    mStylusState.buttons = mTouchButtonAccumulator.getButtonState();
6788
6789    mContext->dispatchExternalStylusState(mStylusState);
6790}
6791
6792
6793// --- JoystickInputMapper ---
6794
6795JoystickInputMapper::JoystickInputMapper(InputDevice* device) :
6796        InputMapper(device) {
6797}
6798
6799JoystickInputMapper::~JoystickInputMapper() {
6800}
6801
6802uint32_t JoystickInputMapper::getSources() {
6803    return AINPUT_SOURCE_JOYSTICK;
6804}
6805
6806void JoystickInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
6807    InputMapper::populateDeviceInfo(info);
6808
6809    for (size_t i = 0; i < mAxes.size(); i++) {
6810        const Axis& axis = mAxes.valueAt(i);
6811        addMotionRange(axis.axisInfo.axis, axis, info);
6812
6813        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
6814            addMotionRange(axis.axisInfo.highAxis, axis, info);
6815
6816        }
6817    }
6818}
6819
6820void JoystickInputMapper::addMotionRange(int32_t axisId, const Axis& axis,
6821        InputDeviceInfo* info) {
6822    info->addMotionRange(axisId, AINPUT_SOURCE_JOYSTICK,
6823            axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
6824    /* In order to ease the transition for developers from using the old axes
6825     * to the newer, more semantically correct axes, we'll continue to register
6826     * the old axes as duplicates of their corresponding new ones.  */
6827    int32_t compatAxis = getCompatAxis(axisId);
6828    if (compatAxis >= 0) {
6829        info->addMotionRange(compatAxis, AINPUT_SOURCE_JOYSTICK,
6830                axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
6831    }
6832}
6833
6834/* A mapping from axes the joystick actually has to the axes that should be
6835 * artificially created for compatibility purposes.
6836 * Returns -1 if no compatibility axis is needed. */
6837int32_t JoystickInputMapper::getCompatAxis(int32_t axis) {
6838    switch(axis) {
6839    case AMOTION_EVENT_AXIS_LTRIGGER:
6840        return AMOTION_EVENT_AXIS_BRAKE;
6841    case AMOTION_EVENT_AXIS_RTRIGGER:
6842        return AMOTION_EVENT_AXIS_GAS;
6843    }
6844    return -1;
6845}
6846
6847void JoystickInputMapper::dump(String8& dump) {
6848    dump.append(INDENT2 "Joystick Input Mapper:\n");
6849
6850    dump.append(INDENT3 "Axes:\n");
6851    size_t numAxes = mAxes.size();
6852    for (size_t i = 0; i < numAxes; i++) {
6853        const Axis& axis = mAxes.valueAt(i);
6854        const char* label = getAxisLabel(axis.axisInfo.axis);
6855        if (label) {
6856            dump.appendFormat(INDENT4 "%s", label);
6857        } else {
6858            dump.appendFormat(INDENT4 "%d", axis.axisInfo.axis);
6859        }
6860        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
6861            label = getAxisLabel(axis.axisInfo.highAxis);
6862            if (label) {
6863                dump.appendFormat(" / %s (split at %d)", label, axis.axisInfo.splitValue);
6864            } else {
6865                dump.appendFormat(" / %d (split at %d)", axis.axisInfo.highAxis,
6866                        axis.axisInfo.splitValue);
6867            }
6868        } else if (axis.axisInfo.mode == AxisInfo::MODE_INVERT) {
6869            dump.append(" (invert)");
6870        }
6871
6872        dump.appendFormat(": min=%0.5f, max=%0.5f, flat=%0.5f, fuzz=%0.5f, resolution=%0.5f\n",
6873                axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
6874        dump.appendFormat(INDENT4 "  scale=%0.5f, offset=%0.5f, "
6875                "highScale=%0.5f, highOffset=%0.5f\n",
6876                axis.scale, axis.offset, axis.highScale, axis.highOffset);
6877        dump.appendFormat(INDENT4 "  rawAxis=%d, rawMin=%d, rawMax=%d, "
6878                "rawFlat=%d, rawFuzz=%d, rawResolution=%d\n",
6879                mAxes.keyAt(i), axis.rawAxisInfo.minValue, axis.rawAxisInfo.maxValue,
6880                axis.rawAxisInfo.flat, axis.rawAxisInfo.fuzz, axis.rawAxisInfo.resolution);
6881    }
6882}
6883
6884void JoystickInputMapper::configure(nsecs_t when,
6885        const InputReaderConfiguration* config, uint32_t changes) {
6886    InputMapper::configure(when, config, changes);
6887
6888    if (!changes) { // first time only
6889        // Collect all axes.
6890        for (int32_t abs = 0; abs <= ABS_MAX; abs++) {
6891            if (!(getAbsAxisUsage(abs, getDevice()->getClasses())
6892                    & INPUT_DEVICE_CLASS_JOYSTICK)) {
6893                continue; // axis must be claimed by a different device
6894            }
6895
6896            RawAbsoluteAxisInfo rawAxisInfo;
6897            getAbsoluteAxisInfo(abs, &rawAxisInfo);
6898            if (rawAxisInfo.valid) {
6899                // Map axis.
6900                AxisInfo axisInfo;
6901                bool explicitlyMapped = !getEventHub()->mapAxis(getDeviceId(), abs, &axisInfo);
6902                if (!explicitlyMapped) {
6903                    // Axis is not explicitly mapped, will choose a generic axis later.
6904                    axisInfo.mode = AxisInfo::MODE_NORMAL;
6905                    axisInfo.axis = -1;
6906                }
6907
6908                // Apply flat override.
6909                int32_t rawFlat = axisInfo.flatOverride < 0
6910                        ? rawAxisInfo.flat : axisInfo.flatOverride;
6911
6912                // Calculate scaling factors and limits.
6913                Axis axis;
6914                if (axisInfo.mode == AxisInfo::MODE_SPLIT) {
6915                    float scale = 1.0f / (axisInfo.splitValue - rawAxisInfo.minValue);
6916                    float highScale = 1.0f / (rawAxisInfo.maxValue - axisInfo.splitValue);
6917                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
6918                            scale, 0.0f, highScale, 0.0f,
6919                            0.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
6920                            rawAxisInfo.resolution * scale);
6921                } else if (isCenteredAxis(axisInfo.axis)) {
6922                    float scale = 2.0f / (rawAxisInfo.maxValue - rawAxisInfo.minValue);
6923                    float offset = avg(rawAxisInfo.minValue, rawAxisInfo.maxValue) * -scale;
6924                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
6925                            scale, offset, scale, offset,
6926                            -1.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
6927                            rawAxisInfo.resolution * scale);
6928                } else {
6929                    float scale = 1.0f / (rawAxisInfo.maxValue - rawAxisInfo.minValue);
6930                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
6931                            scale, 0.0f, scale, 0.0f,
6932                            0.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
6933                            rawAxisInfo.resolution * scale);
6934                }
6935
6936                // To eliminate noise while the joystick is at rest, filter out small variations
6937                // in axis values up front.
6938                axis.filter = axis.fuzz ? axis.fuzz : axis.flat * 0.25f;
6939
6940                mAxes.add(abs, axis);
6941            }
6942        }
6943
6944        // If there are too many axes, start dropping them.
6945        // Prefer to keep explicitly mapped axes.
6946        if (mAxes.size() > PointerCoords::MAX_AXES) {
6947            ALOGI("Joystick '%s' has %zu axes but the framework only supports a maximum of %d.",
6948                    getDeviceName().string(), mAxes.size(), PointerCoords::MAX_AXES);
6949            pruneAxes(true);
6950            pruneAxes(false);
6951        }
6952
6953        // Assign generic axis ids to remaining axes.
6954        int32_t nextGenericAxisId = AMOTION_EVENT_AXIS_GENERIC_1;
6955        size_t numAxes = mAxes.size();
6956        for (size_t i = 0; i < numAxes; i++) {
6957            Axis& axis = mAxes.editValueAt(i);
6958            if (axis.axisInfo.axis < 0) {
6959                while (nextGenericAxisId <= AMOTION_EVENT_AXIS_GENERIC_16
6960                        && haveAxis(nextGenericAxisId)) {
6961                    nextGenericAxisId += 1;
6962                }
6963
6964                if (nextGenericAxisId <= AMOTION_EVENT_AXIS_GENERIC_16) {
6965                    axis.axisInfo.axis = nextGenericAxisId;
6966                    nextGenericAxisId += 1;
6967                } else {
6968                    ALOGI("Ignoring joystick '%s' axis %d because all of the generic axis ids "
6969                            "have already been assigned to other axes.",
6970                            getDeviceName().string(), mAxes.keyAt(i));
6971                    mAxes.removeItemsAt(i--);
6972                    numAxes -= 1;
6973                }
6974            }
6975        }
6976    }
6977}
6978
6979bool JoystickInputMapper::haveAxis(int32_t axisId) {
6980    size_t numAxes = mAxes.size();
6981    for (size_t i = 0; i < numAxes; i++) {
6982        const Axis& axis = mAxes.valueAt(i);
6983        if (axis.axisInfo.axis == axisId
6984                || (axis.axisInfo.mode == AxisInfo::MODE_SPLIT
6985                        && axis.axisInfo.highAxis == axisId)) {
6986            return true;
6987        }
6988    }
6989    return false;
6990}
6991
6992void JoystickInputMapper::pruneAxes(bool ignoreExplicitlyMappedAxes) {
6993    size_t i = mAxes.size();
6994    while (mAxes.size() > PointerCoords::MAX_AXES && i-- > 0) {
6995        if (ignoreExplicitlyMappedAxes && mAxes.valueAt(i).explicitlyMapped) {
6996            continue;
6997        }
6998        ALOGI("Discarding joystick '%s' axis %d because there are too many axes.",
6999                getDeviceName().string(), mAxes.keyAt(i));
7000        mAxes.removeItemsAt(i);
7001    }
7002}
7003
7004bool JoystickInputMapper::isCenteredAxis(int32_t axis) {
7005    switch (axis) {
7006    case AMOTION_EVENT_AXIS_X:
7007    case AMOTION_EVENT_AXIS_Y:
7008    case AMOTION_EVENT_AXIS_Z:
7009    case AMOTION_EVENT_AXIS_RX:
7010    case AMOTION_EVENT_AXIS_RY:
7011    case AMOTION_EVENT_AXIS_RZ:
7012    case AMOTION_EVENT_AXIS_HAT_X:
7013    case AMOTION_EVENT_AXIS_HAT_Y:
7014    case AMOTION_EVENT_AXIS_ORIENTATION:
7015    case AMOTION_EVENT_AXIS_RUDDER:
7016    case AMOTION_EVENT_AXIS_WHEEL:
7017        return true;
7018    default:
7019        return false;
7020    }
7021}
7022
7023void JoystickInputMapper::reset(nsecs_t when) {
7024    // Recenter all axes.
7025    size_t numAxes = mAxes.size();
7026    for (size_t i = 0; i < numAxes; i++) {
7027        Axis& axis = mAxes.editValueAt(i);
7028        axis.resetValue();
7029    }
7030
7031    InputMapper::reset(when);
7032}
7033
7034void JoystickInputMapper::process(const RawEvent* rawEvent) {
7035    switch (rawEvent->type) {
7036    case EV_ABS: {
7037        ssize_t index = mAxes.indexOfKey(rawEvent->code);
7038        if (index >= 0) {
7039            Axis& axis = mAxes.editValueAt(index);
7040            float newValue, highNewValue;
7041            switch (axis.axisInfo.mode) {
7042            case AxisInfo::MODE_INVERT:
7043                newValue = (axis.rawAxisInfo.maxValue - rawEvent->value)
7044                        * axis.scale + axis.offset;
7045                highNewValue = 0.0f;
7046                break;
7047            case AxisInfo::MODE_SPLIT:
7048                if (rawEvent->value < axis.axisInfo.splitValue) {
7049                    newValue = (axis.axisInfo.splitValue - rawEvent->value)
7050                            * axis.scale + axis.offset;
7051                    highNewValue = 0.0f;
7052                } else if (rawEvent->value > axis.axisInfo.splitValue) {
7053                    newValue = 0.0f;
7054                    highNewValue = (rawEvent->value - axis.axisInfo.splitValue)
7055                            * axis.highScale + axis.highOffset;
7056                } else {
7057                    newValue = 0.0f;
7058                    highNewValue = 0.0f;
7059                }
7060                break;
7061            default:
7062                newValue = rawEvent->value * axis.scale + axis.offset;
7063                highNewValue = 0.0f;
7064                break;
7065            }
7066            axis.newValue = newValue;
7067            axis.highNewValue = highNewValue;
7068        }
7069        break;
7070    }
7071
7072    case EV_SYN:
7073        switch (rawEvent->code) {
7074        case SYN_REPORT:
7075            sync(rawEvent->when, false /*force*/);
7076            break;
7077        }
7078        break;
7079    }
7080}
7081
7082void JoystickInputMapper::sync(nsecs_t when, bool force) {
7083    if (!filterAxes(force)) {
7084        return;
7085    }
7086
7087    int32_t metaState = mContext->getGlobalMetaState();
7088    int32_t buttonState = 0;
7089
7090    PointerProperties pointerProperties;
7091    pointerProperties.clear();
7092    pointerProperties.id = 0;
7093    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
7094
7095    PointerCoords pointerCoords;
7096    pointerCoords.clear();
7097
7098    size_t numAxes = mAxes.size();
7099    for (size_t i = 0; i < numAxes; i++) {
7100        const Axis& axis = mAxes.valueAt(i);
7101        setPointerCoordsAxisValue(&pointerCoords, axis.axisInfo.axis, axis.currentValue);
7102        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
7103            setPointerCoordsAxisValue(&pointerCoords, axis.axisInfo.highAxis,
7104                    axis.highCurrentValue);
7105        }
7106    }
7107
7108    // Moving a joystick axis should not wake the device because joysticks can
7109    // be fairly noisy even when not in use.  On the other hand, pushing a gamepad
7110    // button will likely wake the device.
7111    // TODO: Use the input device configuration to control this behavior more finely.
7112    uint32_t policyFlags = 0;
7113
7114    NotifyMotionArgs args(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, policyFlags,
7115            AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
7116            ADISPLAY_ID_NONE, 1, &pointerProperties, &pointerCoords, 0, 0, 0);
7117    getListener()->notifyMotion(&args);
7118}
7119
7120void JoystickInputMapper::setPointerCoordsAxisValue(PointerCoords* pointerCoords,
7121        int32_t axis, float value) {
7122    pointerCoords->setAxisValue(axis, value);
7123    /* In order to ease the transition for developers from using the old axes
7124     * to the newer, more semantically correct axes, we'll continue to produce
7125     * values for the old axes as mirrors of the value of their corresponding
7126     * new axes. */
7127    int32_t compatAxis = getCompatAxis(axis);
7128    if (compatAxis >= 0) {
7129        pointerCoords->setAxisValue(compatAxis, value);
7130    }
7131}
7132
7133bool JoystickInputMapper::filterAxes(bool force) {
7134    bool atLeastOneSignificantChange = force;
7135    size_t numAxes = mAxes.size();
7136    for (size_t i = 0; i < numAxes; i++) {
7137        Axis& axis = mAxes.editValueAt(i);
7138        if (force || hasValueChangedSignificantly(axis.filter,
7139                axis.newValue, axis.currentValue, axis.min, axis.max)) {
7140            axis.currentValue = axis.newValue;
7141            atLeastOneSignificantChange = true;
7142        }
7143        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
7144            if (force || hasValueChangedSignificantly(axis.filter,
7145                    axis.highNewValue, axis.highCurrentValue, axis.min, axis.max)) {
7146                axis.highCurrentValue = axis.highNewValue;
7147                atLeastOneSignificantChange = true;
7148            }
7149        }
7150    }
7151    return atLeastOneSignificantChange;
7152}
7153
7154bool JoystickInputMapper::hasValueChangedSignificantly(
7155        float filter, float newValue, float currentValue, float min, float max) {
7156    if (newValue != currentValue) {
7157        // Filter out small changes in value unless the value is converging on the axis
7158        // bounds or center point.  This is intended to reduce the amount of information
7159        // sent to applications by particularly noisy joysticks (such as PS3).
7160        if (fabs(newValue - currentValue) > filter
7161                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, min)
7162                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, max)
7163                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, 0)) {
7164            return true;
7165        }
7166    }
7167    return false;
7168}
7169
7170bool JoystickInputMapper::hasMovedNearerToValueWithinFilteredRange(
7171        float filter, float newValue, float currentValue, float thresholdValue) {
7172    float newDistance = fabs(newValue - thresholdValue);
7173    if (newDistance < filter) {
7174        float oldDistance = fabs(currentValue - thresholdValue);
7175        if (newDistance < oldDistance) {
7176            return true;
7177        }
7178    }
7179    return false;
7180}
7181
7182} // namespace android
7183