| /* |
| * 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> |
| #include <input/InputEventLabels.h> |
| |
| #ifdef __ANDROID__ |
| #include <binder/Parcel.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 --- |
| |
| const char* KeyEvent::getLabel(int32_t keyCode) { |
| return getLabelByKeyCode(keyCode); |
| } |
| |
| int32_t KeyEvent::getKeyCodeFromLabel(const char* label) { |
| return getKeyCodeByLabel(label); |
| } |
| |
| 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 || !BitSet64::hasBit(bits, axis)){ |
| return 0; |
| } |
| return values[BitSet64::getIndexOfBit(bits, axis)]; |
| } |
| |
| status_t PointerCoords::setAxisValue(int32_t axis, float value) { |
| if (axis < 0 || axis > 63) { |
| return NAME_NOT_FOUND; |
| } |
| |
| uint32_t index = BitSet64::getIndexOfBit(bits, axis); |
| if (!BitSet64::hasBit(bits, axis)) { |
| if (value == 0) { |
| return OK; // axes with value 0 do not need to be stored |
| } |
| |
| uint32_t count = BitSet64::count(bits); |
| if (count >= MAX_AXES) { |
| tooManyAxes(axis); |
| return NO_MEMORY; |
| } |
| BitSet64::markBit(bits, axis); |
| 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); |
| } |
| |
| void PointerCoords::applyOffset(float xOffset, float yOffset) { |
| setAxisValue(AMOTION_EVENT_AXIS_X, getX() + xOffset); |
| setAxisValue(AMOTION_EVENT_AXIS_Y, getY() + yOffset); |
| } |
| |
| #ifdef __ANDROID__ |
| status_t PointerCoords::readFromParcel(Parcel* parcel) { |
| bits = parcel->readInt64(); |
| |
| uint32_t count = BitSet64::count(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 = BitSet64::count(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 = BitSet64::count(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 = BitSet64::count(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 actionButton, |
| 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; |
| mActionButton = actionButton; |
| 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; |
| mActionButton = other->mActionButton; |
| 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); |
| } |
| } |
| |
| static void transformPoint(const float matrix[9], float x, float y, float *outX, float *outY) { |
| // Apply perspective transform like Skia. |
| float newX = matrix[0] * x + matrix[1] * y + matrix[2]; |
| float newY = matrix[3] * x + matrix[4] * y + matrix[5]; |
| float newZ = matrix[6] * x + matrix[7] * y + matrix[8]; |
| if (newZ) { |
| newZ = 1.0f / newZ; |
| } |
| *outX = newX * newZ; |
| *outY = newY * newZ; |
| } |
| |
| static float transformAngle(const float matrix[9], float angleRadians, |
| float originX, float originY) { |
| // Construct and transform a vector oriented at the specified clockwise angle from vertical. |
| // Coordinate system: down is increasing Y, right is increasing X. |
| float x = sinf(angleRadians); |
| float y = -cosf(angleRadians); |
| transformPoint(matrix, x, y, &x, &y); |
| x -= originX; |
| y -= originY; |
| |
| // Derive the transformed vector's clockwise angle from vertical. |
| float result = atan2f(x, -y); |
| if (result < - M_PI_2) { |
| result += M_PI; |
| } else if (result > M_PI_2) { |
| result -= M_PI; |
| } |
| return result; |
| } |
| |
| void MotionEvent::transform(const float matrix[9]) { |
| // 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 for that point. |
| float oldXOffset = mXOffset; |
| float oldYOffset = mYOffset; |
| float newX, newY; |
| float rawX = getRawX(0); |
| float rawY = getRawY(0); |
| transformPoint(matrix, rawX + oldXOffset, rawY + oldYOffset, &newX, &newY); |
| mXOffset = newX - rawX; |
| mYOffset = newY - rawY; |
| |
| // Determine how the origin is transformed by the matrix so that we |
| // can transform orientation vectors. |
| float originX, originY; |
| transformPoint(matrix, 0, 0, &originX, &originY); |
| |
| // 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; |
| transformPoint(matrix, x, y, &x, &y); |
| c.setAxisValue(AMOTION_EVENT_AXIS_X, x - mXOffset); |
| c.setAxisValue(AMOTION_EVENT_AXIS_Y, y - mYOffset); |
| |
| float orientation = c.getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION); |
| c.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, |
| transformAngle(matrix, orientation, originX, originY)); |
| } |
| } |
| |
| #ifdef __ANDROID__ |
| status_t MotionEvent::readFromParcel(Parcel* parcel) { |
| size_t pointerCount = parcel->readInt32(); |
| size_t sampleCount = parcel->readInt32(); |
| if (pointerCount == 0 || pointerCount > MAX_POINTERS || |
| sampleCount == 0 || sampleCount > MAX_SAMPLES) { |
| return BAD_VALUE; |
| } |
| |
| mDeviceId = parcel->readInt32(); |
| mSource = parcel->readInt32(); |
| mAction = parcel->readInt32(); |
| mActionButton = 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) { |
| sampleCount--; |
| 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(mActionButton); |
| 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; |
| } |
| |
| const char* MotionEvent::getLabel(int32_t axis) { |
| return getAxisLabel(axis); |
| } |
| |
| int32_t MotionEvent::getAxisFromLabel(const char* label) { |
| return getAxisByLabel(label); |
| } |
| |
| |
| // --- 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 |