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replicant-frameworks_native/libs/ui/Input.cpp
Jeff Brown 3ea4de826d Add new axes for joysticks and mouse wheels. 
Added API on InputDevice to query the set of axes available.
Added API on KeyEvent and MotionEvent to convert keycodes and axes
to symbolic name strings for diagnostic purposes.
Added API on KeyEvent to query if a given key code is a gamepad button.
Added a new "axis" element to key layout files to specify the
mapping between raw absolute axis values and motion axis ids.
Expanded the axis bitfield to 64bits to allow for future growth.
Modified the Makefile for keyboard prebuilts to run the keymap
validation tool during the build.
Added layouts for two game controllers.
Added default actions for game pad button keys.
Added more tests.
Fixed a bunch of bugs.

Change-Id: I73f9166c3b3c5bcf4970845b58088ad467525525
2011-02-19 05:23:10 -08:00

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//
// Copyright 2010 The Android Open Source Project
//
// Provides a pipe-based transport for native events in the NDK.
//
#define LOG_TAG "Input"
//#define LOG_NDEBUG 0
#define DEBUG_PROBE 0
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <ui/Input.h>
#include <math.h>
#ifdef HAVE_ANDROID_OS
#include <binder/Parcel.h>
#include "SkPoint.h"
#include "SkMatrix.h"
#include "SkScalar.h"
#endif
namespace android {
static const char* CONFIGURATION_FILE_DIR[] = {
"idc/",
"keylayout/",
"keychars/",
};
static const char* CONFIGURATION_FILE_EXTENSION[] = {
".idc",
".kl",
".kcm",
};
static bool isValidNameChar(char ch) {
return isascii(ch) && (isdigit(ch) || isalpha(ch) || ch == '-' || ch == '_');
}
static void appendInputDeviceConfigurationFileRelativePath(String8& path,
const String8& name, InputDeviceConfigurationFileType type) {
path.append(CONFIGURATION_FILE_DIR[type]);
for (size_t i = 0; i < name.length(); i++) {
char ch = name[i];
if (!isValidNameChar(ch)) {
ch = '_';
}
path.append(&ch, 1);
}
path.append(CONFIGURATION_FILE_EXTENSION[type]);
}
String8 getInputDeviceConfigurationFilePathByDeviceIdentifier(
const InputDeviceIdentifier& deviceIdentifier,
InputDeviceConfigurationFileType type) {
if (deviceIdentifier.vendor !=0 && deviceIdentifier.product != 0) {
if (deviceIdentifier.version != 0) {
// Try vendor product version.
String8 versionPath(getInputDeviceConfigurationFilePathByName(
String8::format("Vendor_%04x_Product_%04x_Version_%04x",
deviceIdentifier.vendor, deviceIdentifier.product,
deviceIdentifier.version),
type));
if (!versionPath.isEmpty()) {
return versionPath;
}
}
// Try vendor product.
String8 productPath(getInputDeviceConfigurationFilePathByName(
String8::format("Vendor_%04x_Product_%04x",
deviceIdentifier.vendor, deviceIdentifier.product),
type));
if (!productPath.isEmpty()) {
return productPath;
}
}
// Try device name.
return getInputDeviceConfigurationFilePathByName(deviceIdentifier.name, type);
}
String8 getInputDeviceConfigurationFilePathByName(
const String8& name, InputDeviceConfigurationFileType type) {
// Search system repository.
String8 path;
path.setTo(getenv("ANDROID_ROOT"));
path.append("/usr/");
appendInputDeviceConfigurationFileRelativePath(path, name, type);
#if DEBUG_PROBE
LOGD("Probing for system provided input device configuration file: path='%s'", path.string());
#endif
if (!access(path.string(), R_OK)) {
#if DEBUG_PROBE
LOGD("Found");
#endif
return path;
}
// Search user repository.
// TODO Should only look here if not in safe mode.
path.setTo(getenv("ANDROID_DATA"));
path.append("/system/devices/");
appendInputDeviceConfigurationFileRelativePath(path, name, type);
#if DEBUG_PROBE
LOGD("Probing for system user input device configuration file: path='%s'", path.string());
#endif
if (!access(path.string(), R_OK)) {
#if DEBUG_PROBE
LOGD("Found");
#endif
return path;
}
// Not found.
#if DEBUG_PROBE
LOGD("Probe failed to find input device configuration file: name='%s', type=%d",
name.string(), type);
#endif
return String8();
}
// --- InputEvent ---
void InputEvent::initialize(int32_t deviceId, int32_t source) {
mDeviceId = deviceId;
mSource = source;
}
void InputEvent::initialize(const InputEvent& from) {
mDeviceId = from.mDeviceId;
mSource = from.mSource;
}
// --- KeyEvent ---
bool KeyEvent::hasDefaultAction(int32_t keyCode) {
switch (keyCode) {
case AKEYCODE_HOME:
case AKEYCODE_BACK:
case AKEYCODE_CALL:
case AKEYCODE_ENDCALL:
case AKEYCODE_VOLUME_UP:
case AKEYCODE_VOLUME_DOWN:
case AKEYCODE_VOLUME_MUTE:
case AKEYCODE_POWER:
case AKEYCODE_CAMERA:
case AKEYCODE_HEADSETHOOK:
case AKEYCODE_MENU:
case AKEYCODE_NOTIFICATION:
case AKEYCODE_FOCUS:
case AKEYCODE_SEARCH:
case AKEYCODE_MEDIA_PLAY:
case AKEYCODE_MEDIA_PAUSE:
case AKEYCODE_MEDIA_PLAY_PAUSE:
case AKEYCODE_MEDIA_STOP:
case AKEYCODE_MEDIA_NEXT:
case AKEYCODE_MEDIA_PREVIOUS:
case AKEYCODE_MEDIA_REWIND:
case AKEYCODE_MEDIA_RECORD:
case AKEYCODE_MEDIA_FAST_FORWARD:
case AKEYCODE_MUTE:
return true;
}
return false;
}
bool KeyEvent::hasDefaultAction() const {
return hasDefaultAction(getKeyCode());
}
bool KeyEvent::isSystemKey(int32_t keyCode) {
switch (keyCode) {
case AKEYCODE_MENU:
case AKEYCODE_SOFT_RIGHT:
case AKEYCODE_HOME:
case AKEYCODE_BACK:
case AKEYCODE_CALL:
case AKEYCODE_ENDCALL:
case AKEYCODE_VOLUME_UP:
case AKEYCODE_VOLUME_DOWN:
case AKEYCODE_VOLUME_MUTE:
case AKEYCODE_MUTE:
case AKEYCODE_POWER:
case AKEYCODE_HEADSETHOOK:
case AKEYCODE_MEDIA_PLAY:
case AKEYCODE_MEDIA_PAUSE:
case AKEYCODE_MEDIA_PLAY_PAUSE:
case AKEYCODE_MEDIA_STOP:
case AKEYCODE_MEDIA_NEXT:
case AKEYCODE_MEDIA_PREVIOUS:
case AKEYCODE_MEDIA_REWIND:
case AKEYCODE_MEDIA_RECORD:
case AKEYCODE_MEDIA_FAST_FORWARD:
case AKEYCODE_CAMERA:
case AKEYCODE_FOCUS:
case AKEYCODE_SEARCH:
return true;
}
return false;
}
bool KeyEvent::isSystemKey() const {
return isSystemKey(getKeyCode());
}
void KeyEvent::initialize(
int32_t deviceId,
int32_t source,
int32_t action,
int32_t flags,
int32_t keyCode,
int32_t scanCode,
int32_t metaState,
int32_t repeatCount,
nsecs_t downTime,
nsecs_t eventTime) {
InputEvent::initialize(deviceId, source);
mAction = action;
mFlags = flags;
mKeyCode = keyCode;
mScanCode = scanCode;
mMetaState = metaState;
mRepeatCount = repeatCount;
mDownTime = downTime;
mEventTime = eventTime;
}
void KeyEvent::initialize(const KeyEvent& from) {
InputEvent::initialize(from);
mAction = from.mAction;
mFlags = from.mFlags;
mKeyCode = from.mKeyCode;
mScanCode = from.mScanCode;
mMetaState = from.mMetaState;
mRepeatCount = from.mRepeatCount;
mDownTime = from.mDownTime;
mEventTime = from.mEventTime;
}
// --- PointerCoords ---
float PointerCoords::getAxisValue(int32_t axis) const {
if (axis < 0 || axis > 63) {
return 0;
}
uint64_t axisBit = 1LL << axis;
if (!(bits & axisBit)) {
return 0;
}
uint32_t index = __builtin_popcountll(bits & (axisBit - 1LL));
return values[index];
}
status_t PointerCoords::setAxisValue(int32_t axis, float value) {
if (axis < 0 || axis > 63) {
return NAME_NOT_FOUND;
}
uint64_t axisBit = 1LL << axis;
uint32_t index = __builtin_popcountll(bits & (axisBit - 1LL));
if (!(bits & axisBit)) {
uint32_t count = __builtin_popcountll(bits);
if (count >= MAX_AXES) {
tooManyAxes(axis);
return NO_MEMORY;
}
bits |= axisBit;
for (uint32_t i = count; i > index; i--) {
values[i] = values[i - 1];
}
}
values[index] = value;
return OK;
}
float* PointerCoords::editAxisValue(int32_t axis) {
if (axis < 0 || axis > 63) {
return NULL;
}
uint64_t axisBit = 1LL << axis;
if (!(bits & axisBit)) {
return NULL;
}
uint32_t index = __builtin_popcountll(bits & (axisBit - 1LL));
return &values[index];
}
#ifdef HAVE_ANDROID_OS
status_t PointerCoords::readFromParcel(Parcel* parcel) {
bits = parcel->readInt64();
uint32_t count = __builtin_popcountll(bits);
if (count > MAX_AXES) {
return BAD_VALUE;
}
for (uint32_t i = 0; i < count; i++) {
values[i] = parcel->readInt32();
}
return OK;
}
status_t PointerCoords::writeToParcel(Parcel* parcel) const {
parcel->writeInt64(bits);
uint32_t count = __builtin_popcountll(bits);
for (uint32_t i = 0; i < count; i++) {
parcel->writeInt32(values[i]);
}
return OK;
}
#endif
void PointerCoords::tooManyAxes(int axis) {
LOGW("Could not set value for axis %d because the PointerCoords structure is full and "
"cannot contain more than %d axis values.", axis, int(MAX_AXES));
}
// --- MotionEvent ---
void MotionEvent::initialize(
int32_t deviceId,
int32_t source,
int32_t action,
int32_t flags,
int32_t edgeFlags,
int32_t metaState,
float xOffset,
float yOffset,
float xPrecision,
float yPrecision,
nsecs_t downTime,
nsecs_t eventTime,
size_t pointerCount,
const int32_t* pointerIds,
const PointerCoords* pointerCoords) {
InputEvent::initialize(deviceId, source);
mAction = action;
mFlags = flags;
mEdgeFlags = edgeFlags;
mMetaState = metaState;
mXOffset = xOffset;
mYOffset = yOffset;
mXPrecision = xPrecision;
mYPrecision = yPrecision;
mDownTime = downTime;
mPointerIds.clear();
mPointerIds.appendArray(pointerIds, pointerCount);
mSampleEventTimes.clear();
mSamplePointerCoords.clear();
addSample(eventTime, pointerCoords);
}
void MotionEvent::copyFrom(const MotionEvent* other, bool keepHistory) {
InputEvent::initialize(other->mDeviceId, other->mSource);
mAction = other->mAction;
mFlags = other->mFlags;
mEdgeFlags = other->mEdgeFlags;
mMetaState = other->mMetaState;
mXOffset = other->mXOffset;
mYOffset = other->mYOffset;
mXPrecision = other->mXPrecision;
mYPrecision = other->mYPrecision;
mDownTime = other->mDownTime;
mPointerIds = other->mPointerIds;
if (keepHistory) {
mSampleEventTimes = other->mSampleEventTimes;
mSamplePointerCoords = other->mSamplePointerCoords;
} else {
mSampleEventTimes.clear();
mSampleEventTimes.push(other->getEventTime());
mSamplePointerCoords.clear();
size_t pointerCount = other->getPointerCount();
size_t historySize = other->getHistorySize();
mSamplePointerCoords.appendArray(other->mSamplePointerCoords.array()
+ (historySize * pointerCount), pointerCount);
}
}
void MotionEvent::addSample(
int64_t eventTime,
const PointerCoords* pointerCoords) {
mSampleEventTimes.push(eventTime);
mSamplePointerCoords.appendArray(pointerCoords, getPointerCount());
}
const PointerCoords* MotionEvent::getRawPointerCoords(size_t pointerIndex) const {
return &mSamplePointerCoords[getHistorySize() * getPointerCount() + pointerIndex];
}
float MotionEvent::getRawAxisValue(int32_t axis, size_t pointerIndex) const {
return getRawPointerCoords(pointerIndex)->getAxisValue(axis);
}
float MotionEvent::getAxisValue(int32_t axis, size_t pointerIndex) const {
float value = getRawPointerCoords(pointerIndex)->getAxisValue(axis);
switch (axis) {
case AMOTION_EVENT_AXIS_X:
value += mXOffset;
break;
case AMOTION_EVENT_AXIS_Y:
value += mYOffset;
break;
}
return value;
}
const PointerCoords* MotionEvent::getHistoricalRawPointerCoords(
size_t pointerIndex, size_t historicalIndex) const {
return &mSamplePointerCoords[historicalIndex * getPointerCount() + pointerIndex];
}
float MotionEvent::getHistoricalRawAxisValue(int32_t axis, size_t pointerIndex,
size_t historicalIndex) const {
return getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getAxisValue(axis);
}
float MotionEvent::getHistoricalAxisValue(int32_t axis, size_t pointerIndex,
size_t historicalIndex) const {
float value = getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getAxisValue(axis);
switch (axis) {
case AMOTION_EVENT_AXIS_X:
value += mXOffset;
break;
case AMOTION_EVENT_AXIS_Y:
value += mYOffset;
break;
}
return value;
}
void MotionEvent::offsetLocation(float xOffset, float yOffset) {
mXOffset += xOffset;
mYOffset += yOffset;
}
static inline void scaleAxisValue(PointerCoords& c, int axis, float scaleFactor) {
float* value = c.editAxisValue(axis);
if (value) {
*value *= scaleFactor;
}
}
void MotionEvent::scale(float scaleFactor) {
mXOffset *= scaleFactor;
mYOffset *= scaleFactor;
mXPrecision *= scaleFactor;
mYPrecision *= scaleFactor;
size_t numSamples = mSamplePointerCoords.size();
for (size_t i = 0; i < numSamples; i++) {
PointerCoords& c = mSamplePointerCoords.editItemAt(i);
// No need to scale pressure or size since they are normalized.
// No need to scale orientation since it is meaningless to do so.
scaleAxisValue(c, AMOTION_EVENT_AXIS_X, scaleFactor);
scaleAxisValue(c, AMOTION_EVENT_AXIS_Y, scaleFactor);
scaleAxisValue(c, AMOTION_EVENT_AXIS_TOUCH_MAJOR, scaleFactor);
scaleAxisValue(c, AMOTION_EVENT_AXIS_TOUCH_MINOR, scaleFactor);
scaleAxisValue(c, AMOTION_EVENT_AXIS_TOOL_MAJOR, scaleFactor);
scaleAxisValue(c, AMOTION_EVENT_AXIS_TOOL_MINOR, scaleFactor);
}
}
#ifdef HAVE_ANDROID_OS
static inline float transformAngle(const SkMatrix* matrix, float angleRadians) {
// Construct and transform a vector oriented at the specified clockwise angle from vertical.
// Coordinate system: down is increasing Y, right is increasing X.
SkPoint vector;
vector.fX = SkFloatToScalar(sinf(angleRadians));
vector.fY = SkFloatToScalar(-cosf(angleRadians));
matrix->mapVectors(& vector, 1);
// Derive the transformed vector's clockwise angle from vertical.
float result = atan2f(SkScalarToFloat(vector.fX), SkScalarToFloat(-vector.fY));
if (result < - M_PI_2) {
result += M_PI;
} else if (result > M_PI_2) {
result -= M_PI;
}
return result;
}
void MotionEvent::transform(const SkMatrix* matrix) {
float oldXOffset = mXOffset;
float oldYOffset = mYOffset;
// The tricky part of this implementation is to preserve the value of
// rawX and rawY. So we apply the transformation to the first point
// then derive an appropriate new X/Y offset that will preserve rawX and rawY.
SkPoint point;
float rawX = getRawX(0);
float rawY = getRawY(0);
matrix->mapXY(SkFloatToScalar(rawX + oldXOffset), SkFloatToScalar(rawY + oldYOffset),
& point);
float newX = SkScalarToFloat(point.fX);
float newY = SkScalarToFloat(point.fY);
float newXOffset = newX - rawX;
float newYOffset = newY - rawY;
mXOffset = newXOffset;
mYOffset = newYOffset;
// Apply the transformation to all samples.
size_t numSamples = mSamplePointerCoords.size();
for (size_t i = 0; i < numSamples; i++) {
PointerCoords& c = mSamplePointerCoords.editItemAt(i);
float* xPtr = c.editAxisValue(AMOTION_EVENT_AXIS_X);
float* yPtr = c.editAxisValue(AMOTION_EVENT_AXIS_Y);
if (xPtr && yPtr) {
float x = *xPtr + oldXOffset;
float y = *yPtr + oldYOffset;
matrix->mapXY(SkFloatToScalar(x), SkFloatToScalar(y), & point);
*xPtr = SkScalarToFloat(point.fX) - newXOffset;
*yPtr = SkScalarToFloat(point.fY) - newYOffset;
}
float* orientationPtr = c.editAxisValue(AMOTION_EVENT_AXIS_ORIENTATION);
if (orientationPtr) {
*orientationPtr = transformAngle(matrix, *orientationPtr);
}
}
}
status_t MotionEvent::readFromParcel(Parcel* parcel) {
size_t pointerCount = parcel->readInt32();
size_t sampleCount = parcel->readInt32();
if (pointerCount == 0 || pointerCount > MAX_POINTERS || sampleCount == 0) {
return BAD_VALUE;
}
mDeviceId = parcel->readInt32();
mSource = parcel->readInt32();
mAction = parcel->readInt32();
mFlags = parcel->readInt32();
mEdgeFlags = parcel->readInt32();
mMetaState = parcel->readInt32();
mXOffset = parcel->readFloat();
mYOffset = parcel->readFloat();
mXPrecision = parcel->readFloat();
mYPrecision = parcel->readFloat();
mDownTime = parcel->readInt64();
mPointerIds.clear();
mPointerIds.setCapacity(pointerCount);
mSampleEventTimes.clear();
mSampleEventTimes.setCapacity(sampleCount);
mSamplePointerCoords.clear();
mSamplePointerCoords.setCapacity(sampleCount * pointerCount);
for (size_t i = 0; i < pointerCount; i++) {
mPointerIds.push(parcel->readInt32());
}
while (sampleCount-- > 0) {
mSampleEventTimes.push(parcel->readInt64());
for (size_t i = 0; i < pointerCount; i++) {
mSamplePointerCoords.push();
status_t status = mSamplePointerCoords.editTop().readFromParcel(parcel);
if (status) {
return status;
}
}
}
return OK;
}
status_t MotionEvent::writeToParcel(Parcel* parcel) const {
size_t pointerCount = mPointerIds.size();
size_t sampleCount = mSampleEventTimes.size();
parcel->writeInt32(pointerCount);
parcel->writeInt32(sampleCount);
parcel->writeInt32(mDeviceId);
parcel->writeInt32(mSource);
parcel->writeInt32(mAction);
parcel->writeInt32(mFlags);
parcel->writeInt32(mEdgeFlags);
parcel->writeInt32(mMetaState);
parcel->writeFloat(mXOffset);
parcel->writeFloat(mYOffset);
parcel->writeFloat(mXPrecision);
parcel->writeFloat(mYPrecision);
parcel->writeInt64(mDownTime);
for (size_t i = 0; i < pointerCount; i++) {
parcel->writeInt32(mPointerIds.itemAt(i));
}
const PointerCoords* pc = mSamplePointerCoords.array();
for (size_t h = 0; h < sampleCount; h++) {
parcel->writeInt64(mSampleEventTimes.itemAt(h));
for (size_t i = 0; i < pointerCount; i++) {
status_t status = (pc++)->writeToParcel(parcel);
if (status) {
return status;
}
}
}
return OK;
}
#endif
// --- InputDeviceInfo ---
InputDeviceInfo::InputDeviceInfo() {
initialize(-1, String8("uninitialized device info"));
}
InputDeviceInfo::InputDeviceInfo(const InputDeviceInfo& other) :
mId(other.mId), mName(other.mName), mSources(other.mSources),
mKeyboardType(other.mKeyboardType),
mMotionRanges(other.mMotionRanges) {
}
InputDeviceInfo::~InputDeviceInfo() {
}
void InputDeviceInfo::initialize(int32_t id, const String8& name) {
mId = id;
mName = name;
mSources = 0;
mKeyboardType = AINPUT_KEYBOARD_TYPE_NONE;
mMotionRanges.clear();
}
const InputDeviceInfo::MotionRange* InputDeviceInfo::getMotionRange(int32_t axis) const {
ssize_t index = mMotionRanges.indexOfKey(axis);
return index >= 0 ? & mMotionRanges.valueAt(index) : NULL;
}
void InputDeviceInfo::addSource(uint32_t source) {
mSources |= source;
}
void InputDeviceInfo::addMotionRange(int32_t axis, float min, float max,
float flat, float fuzz) {
MotionRange range = { min, max, flat, fuzz };
addMotionRange(axis, range);
}
void InputDeviceInfo::addMotionRange(int32_t axis, const MotionRange& range) {
mMotionRanges.add(axis, range);
}
} // namespace android
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