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Diffstat (limited to 'libs/input/Input.cpp')
| -rw-r--r-- | libs/input/Input.cpp | 634 |
1 files changed, 634 insertions, 0 deletions
diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp new file mode 100644 index 0000000..7a217c3 --- /dev/null +++ b/libs/input/Input.cpp @@ -0,0 +1,634 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#define LOG_TAG "Input" +//#define LOG_NDEBUG 0 + +#include <math.h> +#include <limits.h> + +#include <input/Input.h> + +#ifdef HAVE_ANDROID_OS +#include <binder/Parcel.h> + +#include "SkPoint.h" +#include "SkMatrix.h" +#include "SkScalar.h" +#endif + +namespace android { + +// --- 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: + case AKEYCODE_BRIGHTNESS_DOWN: + case AKEYCODE_BRIGHTNESS_UP: + 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: + case AKEYCODE_BRIGHTNESS_DOWN: + case AKEYCODE_BRIGHTNESS_UP: + 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)) { + if (value == 0) { + return OK; // axes with value 0 do not need to be stored + } + 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; +} + +static inline void scaleAxisValue(PointerCoords& c, int axis, float scaleFactor) { + float value = c.getAxisValue(axis); + if (value != 0) { + c.setAxisValue(axis, value * scaleFactor); + } +} + +void PointerCoords::scale(float scaleFactor) { + // No need to scale pressure or size since they are normalized. + // No need to scale orientation since it is meaningless to do so. + scaleAxisValue(*this, AMOTION_EVENT_AXIS_X, scaleFactor); + scaleAxisValue(*this, AMOTION_EVENT_AXIS_Y, scaleFactor); + scaleAxisValue(*this, AMOTION_EVENT_AXIS_TOUCH_MAJOR, scaleFactor); + scaleAxisValue(*this, AMOTION_EVENT_AXIS_TOUCH_MINOR, scaleFactor); + scaleAxisValue(*this, AMOTION_EVENT_AXIS_TOOL_MAJOR, scaleFactor); + scaleAxisValue(*this, AMOTION_EVENT_AXIS_TOOL_MINOR, scaleFactor); +} + +#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->readFloat(); + } + 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->writeFloat(values[i]); + } + return OK; +} +#endif + +void PointerCoords::tooManyAxes(int axis) { + ALOGW("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)); +} + +bool PointerCoords::operator==(const PointerCoords& other) const { + if (bits != other.bits) { + return false; + } + uint32_t count = __builtin_popcountll(bits); + for (uint32_t i = 0; i < count; i++) { + if (values[i] != other.values[i]) { + return false; + } + } + return true; +} + +void PointerCoords::copyFrom(const PointerCoords& other) { + bits = other.bits; + uint32_t count = __builtin_popcountll(bits); + for (uint32_t i = 0; i < count; i++) { + values[i] = other.values[i]; + } +} + + +// --- PointerProperties --- + +bool PointerProperties::operator==(const PointerProperties& other) const { + return id == other.id + && toolType == other.toolType; +} + +void PointerProperties::copyFrom(const PointerProperties& other) { + id = other.id; + toolType = other.toolType; +} + + +// --- MotionEvent --- + +void MotionEvent::initialize( + int32_t deviceId, + int32_t source, + int32_t action, + int32_t flags, + int32_t edgeFlags, + int32_t metaState, + int32_t buttonState, + float xOffset, + float yOffset, + float xPrecision, + float yPrecision, + nsecs_t downTime, + nsecs_t eventTime, + size_t pointerCount, + const PointerProperties* pointerProperties, + const PointerCoords* pointerCoords) { + InputEvent::initialize(deviceId, source); + mAction = action; + mFlags = flags; + mEdgeFlags = edgeFlags; + mMetaState = metaState; + mButtonState = buttonState; + mXOffset = xOffset; + mYOffset = yOffset; + mXPrecision = xPrecision; + mYPrecision = yPrecision; + mDownTime = downTime; + mPointerProperties.clear(); + mPointerProperties.appendArray(pointerProperties, 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; + mButtonState = other->mButtonState; + mXOffset = other->mXOffset; + mYOffset = other->mYOffset; + mXPrecision = other->mXPrecision; + mYPrecision = other->mYPrecision; + mDownTime = other->mDownTime; + mPointerProperties = other->mPointerProperties; + + 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: + return value + mXOffset; + case AMOTION_EVENT_AXIS_Y: + return value + mYOffset; + } + 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: + return value + mXOffset; + case AMOTION_EVENT_AXIS_Y: + return value + mYOffset; + } + return value; +} + +ssize_t MotionEvent::findPointerIndex(int32_t pointerId) const { + size_t pointerCount = mPointerProperties.size(); + for (size_t i = 0; i < pointerCount; i++) { + if (mPointerProperties.itemAt(i).id == pointerId) { + return i; + } + } + return -1; +} + +void MotionEvent::offsetLocation(float xOffset, float yOffset) { + mXOffset += xOffset; + mYOffset += yOffset; +} + +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++) { + mSamplePointerCoords.editItemAt(i).scale(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 x = c.getAxisValue(AMOTION_EVENT_AXIS_X) + oldXOffset; + float y = c.getAxisValue(AMOTION_EVENT_AXIS_Y) + oldYOffset; + matrix->mapXY(SkFloatToScalar(x), SkFloatToScalar(y), &point); + c.setAxisValue(AMOTION_EVENT_AXIS_X, SkScalarToFloat(point.fX) - newXOffset); + c.setAxisValue(AMOTION_EVENT_AXIS_Y, SkScalarToFloat(point.fY) - newYOffset); + + float orientation = c.getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION); + c.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, transformAngle(matrix, orientation)); + } +} + +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(); + mButtonState = parcel->readInt32(); + mXOffset = parcel->readFloat(); + mYOffset = parcel->readFloat(); + mXPrecision = parcel->readFloat(); + mYPrecision = parcel->readFloat(); + mDownTime = parcel->readInt64(); + + mPointerProperties.clear(); + mPointerProperties.setCapacity(pointerCount); + mSampleEventTimes.clear(); + mSampleEventTimes.setCapacity(sampleCount); + mSamplePointerCoords.clear(); + mSamplePointerCoords.setCapacity(sampleCount * pointerCount); + + for (size_t i = 0; i < pointerCount; i++) { + mPointerProperties.push(); + PointerProperties& properties = mPointerProperties.editTop(); + properties.id = parcel->readInt32(); + properties.toolType = 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 = mPointerProperties.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->writeInt32(mButtonState); + parcel->writeFloat(mXOffset); + parcel->writeFloat(mYOffset); + parcel->writeFloat(mXPrecision); + parcel->writeFloat(mYPrecision); + parcel->writeInt64(mDownTime); + + for (size_t i = 0; i < pointerCount; i++) { + const PointerProperties& properties = mPointerProperties.itemAt(i); + parcel->writeInt32(properties.id); + parcel->writeInt32(properties.toolType); + } + + 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 + +bool MotionEvent::isTouchEvent(int32_t source, int32_t action) { + if (source & AINPUT_SOURCE_CLASS_POINTER) { + // Specifically excludes HOVER_MOVE and SCROLL. + switch (action & AMOTION_EVENT_ACTION_MASK) { + case AMOTION_EVENT_ACTION_DOWN: + case AMOTION_EVENT_ACTION_MOVE: + case AMOTION_EVENT_ACTION_UP: + case AMOTION_EVENT_ACTION_POINTER_DOWN: + case AMOTION_EVENT_ACTION_POINTER_UP: + case AMOTION_EVENT_ACTION_CANCEL: + case AMOTION_EVENT_ACTION_OUTSIDE: + return true; + } + } + return false; +} + + +// --- PooledInputEventFactory --- + +PooledInputEventFactory::PooledInputEventFactory(size_t maxPoolSize) : + mMaxPoolSize(maxPoolSize) { +} + +PooledInputEventFactory::~PooledInputEventFactory() { + for (size_t i = 0; i < mKeyEventPool.size(); i++) { + delete mKeyEventPool.itemAt(i); + } + for (size_t i = 0; i < mMotionEventPool.size(); i++) { + delete mMotionEventPool.itemAt(i); + } +} + +KeyEvent* PooledInputEventFactory::createKeyEvent() { + if (!mKeyEventPool.isEmpty()) { + KeyEvent* event = mKeyEventPool.top(); + mKeyEventPool.pop(); + return event; + } + return new KeyEvent(); +} + +MotionEvent* PooledInputEventFactory::createMotionEvent() { + if (!mMotionEventPool.isEmpty()) { + MotionEvent* event = mMotionEventPool.top(); + mMotionEventPool.pop(); + return event; + } + return new MotionEvent(); +} + +void PooledInputEventFactory::recycle(InputEvent* event) { + switch (event->getType()) { + case AINPUT_EVENT_TYPE_KEY: + if (mKeyEventPool.size() < mMaxPoolSize) { + mKeyEventPool.push(static_cast<KeyEvent*>(event)); + return; + } + break; + case AINPUT_EVENT_TYPE_MOTION: + if (mMotionEventPool.size() < mMaxPoolSize) { + mMotionEventPool.push(static_cast<MotionEvent*>(event)); + return; + } + break; + } + delete event; +} + +} // namespace android |