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Diffstat (limited to 'widget/gonk/libui/InputReader.h')
| -rw-r--r-- | widget/gonk/libui/InputReader.h | 1811 |
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diff --git a/widget/gonk/libui/InputReader.h b/widget/gonk/libui/InputReader.h new file mode 100644 index 000000000..5c790fdb8 --- /dev/null +++ b/widget/gonk/libui/InputReader.h @@ -0,0 +1,1811 @@ +/* + * 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. + */ + +#ifndef _UI_INPUT_READER_H +#define _UI_INPUT_READER_H + +#include "EventHub.h" +#include "PointerController.h" +#include "InputListener.h" + +#include "Input.h" +#include "VelocityControl.h" +#include "VelocityTracker.h" +#include <utils/KeyedVector.h> +#include <utils/threads.h> +#include <utils/Timers.h> +#include <utils/RefBase.h> +#include <utils/String8.h> +#include <utils/BitSet.h> + +#include <stddef.h> +#include <unistd.h> + +// Maximum supported size of a vibration pattern. +// Must be at least 2. +#define MAX_VIBRATE_PATTERN_SIZE 100 + +// Maximum allowable delay value in a vibration pattern before +// which the delay will be truncated. +#define MAX_VIBRATE_PATTERN_DELAY_NSECS (1000000 * 1000000000LL) + +namespace android { + +class InputDevice; +class InputMapper; + +/* + * Describes how coordinates are mapped on a physical display. + * See com.android.server.display.DisplayViewport. + */ +struct DisplayViewport { + int32_t displayId; // -1 if invalid + int32_t orientation; + int32_t logicalLeft; + int32_t logicalTop; + int32_t logicalRight; + int32_t logicalBottom; + int32_t physicalLeft; + int32_t physicalTop; + int32_t physicalRight; + int32_t physicalBottom; + int32_t deviceWidth; + int32_t deviceHeight; + + DisplayViewport() : + displayId(ADISPLAY_ID_NONE), orientation(DISPLAY_ORIENTATION_0), + logicalLeft(0), logicalTop(0), logicalRight(0), logicalBottom(0), + physicalLeft(0), physicalTop(0), physicalRight(0), physicalBottom(0), + deviceWidth(0), deviceHeight(0) { + } + + bool operator==(const DisplayViewport& other) const { + return displayId == other.displayId + && orientation == other.orientation + && logicalLeft == other.logicalLeft + && logicalTop == other.logicalTop + && logicalRight == other.logicalRight + && logicalBottom == other.logicalBottom + && physicalLeft == other.physicalLeft + && physicalTop == other.physicalTop + && physicalRight == other.physicalRight + && physicalBottom == other.physicalBottom + && deviceWidth == other.deviceWidth + && deviceHeight == other.deviceHeight; + } + + bool operator!=(const DisplayViewport& other) const { + return !(*this == other); + } + + inline bool isValid() const { + return displayId >= 0; + } + + void setNonDisplayViewport(int32_t width, int32_t height) { + displayId = ADISPLAY_ID_NONE; + orientation = DISPLAY_ORIENTATION_0; + logicalLeft = 0; + logicalTop = 0; + logicalRight = width; + logicalBottom = height; + physicalLeft = 0; + physicalTop = 0; + physicalRight = width; + physicalBottom = height; + deviceWidth = width; + deviceHeight = height; + } +}; + +/* + * Input reader configuration. + * + * Specifies various options that modify the behavior of the input reader. + */ +struct InputReaderConfiguration { + // Describes changes that have occurred. + enum { + // The pointer speed changed. + CHANGE_POINTER_SPEED = 1 << 0, + + // The pointer gesture control changed. + CHANGE_POINTER_GESTURE_ENABLEMENT = 1 << 1, + + // The display size or orientation changed. + CHANGE_DISPLAY_INFO = 1 << 2, + + // The visible touches option changed. + CHANGE_SHOW_TOUCHES = 1 << 3, + + // The keyboard layouts must be reloaded. + CHANGE_KEYBOARD_LAYOUTS = 1 << 4, + + // The device name alias supplied by the may have changed for some devices. + CHANGE_DEVICE_ALIAS = 1 << 5, + + // All devices must be reopened. + CHANGE_MUST_REOPEN = 1 << 31, + }; + + // Gets the amount of time to disable virtual keys after the screen is touched + // in order to filter out accidental virtual key presses due to swiping gestures + // or taps near the edge of the display. May be 0 to disable the feature. + nsecs_t virtualKeyQuietTime; + + // The excluded device names for the platform. + // Devices with these names will be ignored. + Vector<String8> excludedDeviceNames; + + // Velocity control parameters for mouse pointer movements. + VelocityControlParameters pointerVelocityControlParameters; + + // Velocity control parameters for mouse wheel movements. + VelocityControlParameters wheelVelocityControlParameters; + + // True if pointer gestures are enabled. + bool pointerGesturesEnabled; + + // Quiet time between certain pointer gesture transitions. + // Time to allow for all fingers or buttons to settle into a stable state before + // starting a new gesture. + nsecs_t pointerGestureQuietInterval; + + // The minimum speed that a pointer must travel for us to consider switching the active + // touch pointer to it during a drag. This threshold is set to avoid switching due + // to noise from a finger resting on the touch pad (perhaps just pressing it down). + float pointerGestureDragMinSwitchSpeed; // in pixels per second + + // Tap gesture delay time. + // The time between down and up must be less than this to be considered a tap. + nsecs_t pointerGestureTapInterval; + + // Tap drag gesture delay time. + // The time between the previous tap's up and the next down must be less than + // this to be considered a drag. Otherwise, the previous tap is finished and a + // new tap begins. + // + // Note that the previous tap will be held down for this entire duration so this + // interval must be shorter than the long press timeout. + nsecs_t pointerGestureTapDragInterval; + + // The distance in pixels that the pointer is allowed to move from initial down + // to up and still be called a tap. + float pointerGestureTapSlop; // in pixels + + // Time after the first touch points go down to settle on an initial centroid. + // This is intended to be enough time to handle cases where the user puts down two + // fingers at almost but not quite exactly the same time. + nsecs_t pointerGestureMultitouchSettleInterval; + + // The transition from PRESS to SWIPE or FREEFORM gesture mode is made when + // at least two pointers have moved at least this far from their starting place. + float pointerGestureMultitouchMinDistance; // in pixels + + // The transition from PRESS to SWIPE gesture mode can only occur when the + // cosine of the angle between the two vectors is greater than or equal to than this value + // which indicates that the vectors are oriented in the same direction. + // When the vectors are oriented in the exactly same direction, the cosine is 1.0. + // (In exactly opposite directions, the cosine is -1.0.) + float pointerGestureSwipeTransitionAngleCosine; + + // The transition from PRESS to SWIPE gesture mode can only occur when the + // fingers are no more than this far apart relative to the diagonal size of + // the touch pad. For example, a ratio of 0.5 means that the fingers must be + // no more than half the diagonal size of the touch pad apart. + float pointerGestureSwipeMaxWidthRatio; + + // The gesture movement speed factor relative to the size of the display. + // Movement speed applies when the fingers are moving in the same direction. + // Without acceleration, a full swipe of the touch pad diagonal in movement mode + // will cover this portion of the display diagonal. + float pointerGestureMovementSpeedRatio; + + // The gesture zoom speed factor relative to the size of the display. + // Zoom speed applies when the fingers are mostly moving relative to each other + // to execute a scale gesture or similar. + // Without acceleration, a full swipe of the touch pad diagonal in zoom mode + // will cover this portion of the display diagonal. + float pointerGestureZoomSpeedRatio; + + // True to show the location of touches on the touch screen as spots. + bool showTouches; + + InputReaderConfiguration() : + virtualKeyQuietTime(0), + pointerVelocityControlParameters(1.0f, 500.0f, 3000.0f, 3.0f), + wheelVelocityControlParameters(1.0f, 15.0f, 50.0f, 4.0f), + pointerGesturesEnabled(true), + pointerGestureQuietInterval(100 * 1000000LL), // 100 ms + pointerGestureDragMinSwitchSpeed(50), // 50 pixels per second + pointerGestureTapInterval(150 * 1000000LL), // 150 ms + pointerGestureTapDragInterval(150 * 1000000LL), // 150 ms + pointerGestureTapSlop(10.0f), // 10 pixels + pointerGestureMultitouchSettleInterval(100 * 1000000LL), // 100 ms + pointerGestureMultitouchMinDistance(15), // 15 pixels + pointerGestureSwipeTransitionAngleCosine(0.2588f), // cosine of 75 degrees + pointerGestureSwipeMaxWidthRatio(0.25f), + pointerGestureMovementSpeedRatio(0.8f), + pointerGestureZoomSpeedRatio(0.3f), + showTouches(false) { } + + bool getDisplayInfo(bool external, DisplayViewport* outViewport) const; + void setDisplayInfo(bool external, const DisplayViewport& viewport); + +private: + DisplayViewport mInternalDisplay; + DisplayViewport mExternalDisplay; +}; + + +/* + * Input reader policy interface. + * + * The input reader policy is used by the input reader to interact with the Window Manager + * and other system components. + * + * The actual implementation is partially supported by callbacks into the DVM + * via JNI. This interface is also mocked in the unit tests. + * + * These methods must NOT re-enter the input reader since they may be called while + * holding the input reader lock. + */ +class InputReaderPolicyInterface : public virtual RefBase { +protected: + InputReaderPolicyInterface() { } + virtual ~InputReaderPolicyInterface() { } + +public: + /* Gets the input reader configuration. */ + virtual void getReaderConfiguration(InputReaderConfiguration* outConfig) = 0; + + /* Gets a pointer controller associated with the specified cursor device (ie. a mouse). */ + virtual sp<PointerControllerInterface> obtainPointerController(int32_t deviceId) = 0; + + /* Notifies the input reader policy that some input devices have changed + * and provides information about all current input devices. + */ + virtual void notifyInputDevicesChanged(const Vector<InputDeviceInfo>& inputDevices) = 0; + + /* Gets the keyboard layout for a particular input device. */ + virtual sp<KeyCharacterMap> getKeyboardLayoutOverlay(const String8& inputDeviceDescriptor) = 0; + + /* Gets a user-supplied alias for a particular input device, or an empty string if none. */ + virtual String8 getDeviceAlias(const InputDeviceIdentifier& identifier) = 0; +}; + + +/* Processes raw input events and sends cooked event data to an input listener. */ +class InputReaderInterface : public virtual RefBase { +protected: + InputReaderInterface() { } + virtual ~InputReaderInterface() { } + +public: + /* Dumps the state of the input reader. + * + * This method may be called on any thread (usually by the input manager). */ + virtual void dump(String8& dump) = 0; + + /* Called by the heatbeat to ensures that the reader has not deadlocked. */ + virtual void monitor() = 0; + + /* Runs a single iteration of the processing loop. + * Nominally reads and processes one incoming message from the EventHub. + * + * This method should be called on the input reader thread. + */ + virtual void loopOnce() = 0; + + /* Gets information about all input devices. + * + * This method may be called on any thread (usually by the input manager). + */ + virtual void getInputDevices(Vector<InputDeviceInfo>& outInputDevices) = 0; + + /* Query current input state. */ + virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask, + int32_t scanCode) = 0; + virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask, + int32_t keyCode) = 0; + virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask, + int32_t sw) = 0; + + /* Determine whether physical keys exist for the given framework-domain key codes. */ + virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask, + size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) = 0; + + /* Requests that a reconfiguration of all input devices. + * The changes flag is a bitfield that indicates what has changed and whether + * the input devices must all be reopened. */ + virtual void requestRefreshConfiguration(uint32_t changes) = 0; + + /* Controls the vibrator of a particular input device. */ + virtual void vibrate(int32_t deviceId, const nsecs_t* pattern, size_t patternSize, + ssize_t repeat, int32_t token) = 0; + virtual void cancelVibrate(int32_t deviceId, int32_t token) = 0; +}; + + +/* Internal interface used by individual input devices to access global input device state + * and parameters maintained by the input reader. + */ +class InputReaderContext { +public: + InputReaderContext() { } + virtual ~InputReaderContext() { } + + virtual void updateGlobalMetaState() = 0; + virtual int32_t getGlobalMetaState() = 0; + + virtual void disableVirtualKeysUntil(nsecs_t time) = 0; + virtual bool shouldDropVirtualKey(nsecs_t now, + InputDevice* device, int32_t keyCode, int32_t scanCode) = 0; + + virtual void fadePointer() = 0; + + virtual void requestTimeoutAtTime(nsecs_t when) = 0; + virtual int32_t bumpGeneration() = 0; + + virtual InputReaderPolicyInterface* getPolicy() = 0; + virtual InputListenerInterface* getListener() = 0; + virtual EventHubInterface* getEventHub() = 0; +}; + + +/* The input reader reads raw event data from the event hub and processes it into input events + * that it sends to the input listener. Some functions of the input reader, such as early + * event filtering in low power states, are controlled by a separate policy object. + * + * The InputReader owns a collection of InputMappers. Most of the work it does happens + * on the input reader thread but the InputReader can receive queries from other system + * components running on arbitrary threads. To keep things manageable, the InputReader + * uses a single Mutex to guard its state. The Mutex may be held while calling into the + * EventHub or the InputReaderPolicy but it is never held while calling into the + * InputListener. + */ +class InputReader : public InputReaderInterface { +public: + InputReader(const sp<EventHubInterface>& eventHub, + const sp<InputReaderPolicyInterface>& policy, + const sp<InputListenerInterface>& listener); + virtual ~InputReader(); + + virtual void dump(String8& dump); + virtual void monitor(); + + virtual void loopOnce(); + + virtual void getInputDevices(Vector<InputDeviceInfo>& outInputDevices); + + virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask, + int32_t scanCode); + virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask, + int32_t keyCode); + virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask, + int32_t sw); + + virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask, + size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags); + + virtual void requestRefreshConfiguration(uint32_t changes); + + virtual void vibrate(int32_t deviceId, const nsecs_t* pattern, size_t patternSize, + ssize_t repeat, int32_t token); + virtual void cancelVibrate(int32_t deviceId, int32_t token); + +protected: + // These members are protected so they can be instrumented by test cases. + virtual InputDevice* createDeviceLocked(int32_t deviceId, + const InputDeviceIdentifier& identifier, uint32_t classes); + + class ContextImpl : public InputReaderContext { + InputReader* mReader; + + public: + ContextImpl(InputReader* reader); + + virtual void updateGlobalMetaState(); + virtual int32_t getGlobalMetaState(); + virtual void disableVirtualKeysUntil(nsecs_t time); + virtual bool shouldDropVirtualKey(nsecs_t now, + InputDevice* device, int32_t keyCode, int32_t scanCode); + virtual void fadePointer(); + virtual void requestTimeoutAtTime(nsecs_t when); + virtual int32_t bumpGeneration(); + virtual InputReaderPolicyInterface* getPolicy(); + virtual InputListenerInterface* getListener(); + virtual EventHubInterface* getEventHub(); + } mContext; + + friend class ContextImpl; + +private: + Mutex mLock; + + Condition mReaderIsAliveCondition; + + sp<EventHubInterface> mEventHub; + sp<InputReaderPolicyInterface> mPolicy; + sp<QueuedInputListener> mQueuedListener; + + InputReaderConfiguration mConfig; + + // The event queue. + static const int EVENT_BUFFER_SIZE = 256; + RawEvent mEventBuffer[EVENT_BUFFER_SIZE]; + + KeyedVector<int32_t, InputDevice*> mDevices; + + // low-level input event decoding and device management + void processEventsLocked(const RawEvent* rawEvents, size_t count); + + void addDeviceLocked(nsecs_t when, int32_t deviceId); + void removeDeviceLocked(nsecs_t when, int32_t deviceId); + void processEventsForDeviceLocked(int32_t deviceId, const RawEvent* rawEvents, size_t count); + void timeoutExpiredLocked(nsecs_t when); + + void handleConfigurationChangedLocked(nsecs_t when); + + int32_t mGlobalMetaState; + void updateGlobalMetaStateLocked(); + int32_t getGlobalMetaStateLocked(); + + void fadePointerLocked(); + + int32_t mGeneration; + int32_t bumpGenerationLocked(); + + void getInputDevicesLocked(Vector<InputDeviceInfo>& outInputDevices); + + nsecs_t mDisableVirtualKeysTimeout; + void disableVirtualKeysUntilLocked(nsecs_t time); + bool shouldDropVirtualKeyLocked(nsecs_t now, + InputDevice* device, int32_t keyCode, int32_t scanCode); + + nsecs_t mNextTimeout; + void requestTimeoutAtTimeLocked(nsecs_t when); + + uint32_t mConfigurationChangesToRefresh; + void refreshConfigurationLocked(uint32_t changes); + + // state queries + typedef int32_t (InputDevice::*GetStateFunc)(uint32_t sourceMask, int32_t code); + int32_t getStateLocked(int32_t deviceId, uint32_t sourceMask, int32_t code, + GetStateFunc getStateFunc); + bool markSupportedKeyCodesLocked(int32_t deviceId, uint32_t sourceMask, size_t numCodes, + const int32_t* keyCodes, uint8_t* outFlags); +}; + + +/* Reads raw events from the event hub and processes them, endlessly. */ +class InputReaderThread : public Thread { +public: + InputReaderThread(const sp<InputReaderInterface>& reader); + virtual ~InputReaderThread(); + +private: + uint32_t mFoo; + sp<InputReaderInterface> mReader; + + virtual bool threadLoop(); +}; + + +/* Represents the state of a single input device. */ +class InputDevice { +public: + InputDevice(InputReaderContext* context, int32_t id, int32_t generation, + const InputDeviceIdentifier& identifier, uint32_t classes); + ~InputDevice(); + + inline InputReaderContext* getContext() { return mContext; } + inline int32_t getId() { return mId; } + inline int32_t getGeneration() { return mGeneration; } + inline const String8& getName() { return mIdentifier.name; } + inline uint32_t getClasses() { return mClasses; } + inline uint32_t getSources() { return mSources; } + + inline bool isExternal() { return mIsExternal; } + inline void setExternal(bool external) { mIsExternal = external; } + + inline bool isIgnored() { return mMappers.isEmpty(); } + + void dump(String8& dump); + void addMapper(InputMapper* mapper); + void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes); + void reset(nsecs_t when); + void process(const RawEvent* rawEvents, size_t count); + void timeoutExpired(nsecs_t when); + + void getDeviceInfo(InputDeviceInfo* outDeviceInfo); + int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode); + int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); + int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode); + bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes, + const int32_t* keyCodes, uint8_t* outFlags); + void vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat, int32_t token); + void cancelVibrate(int32_t token); + + int32_t getMetaState(); + + void fadePointer(); + + void bumpGeneration(); + + void notifyReset(nsecs_t when); + + inline const PropertyMap& getConfiguration() { return mConfiguration; } + inline EventHubInterface* getEventHub() { return mContext->getEventHub(); } + + bool hasKey(int32_t code) { + return getEventHub()->hasScanCode(mId, code); + } + + bool hasAbsoluteAxis(int32_t code) { + RawAbsoluteAxisInfo info; + getEventHub()->getAbsoluteAxisInfo(mId, code, &info); + return info.valid; + } + + bool isKeyPressed(int32_t code) { + return getEventHub()->getScanCodeState(mId, code) == AKEY_STATE_DOWN; + } + + int32_t getAbsoluteAxisValue(int32_t code) { + int32_t value; + getEventHub()->getAbsoluteAxisValue(mId, code, &value); + return value; + } + +private: + InputReaderContext* mContext; + int32_t mId; + int32_t mGeneration; + InputDeviceIdentifier mIdentifier; + String8 mAlias; + uint32_t mClasses; + + Vector<InputMapper*> mMappers; + + uint32_t mSources; + bool mIsExternal; + bool mDropUntilNextSync; + + typedef int32_t (InputMapper::*GetStateFunc)(uint32_t sourceMask, int32_t code); + int32_t getState(uint32_t sourceMask, int32_t code, GetStateFunc getStateFunc); + + PropertyMap mConfiguration; +}; + + +/* Keeps track of the state of mouse or touch pad buttons. */ +class CursorButtonAccumulator { +public: + CursorButtonAccumulator(); + void reset(InputDevice* device); + + void process(const RawEvent* rawEvent); + + uint32_t getButtonState() const; + +private: + bool mBtnLeft; + bool mBtnRight; + bool mBtnMiddle; + bool mBtnBack; + bool mBtnSide; + bool mBtnForward; + bool mBtnExtra; + bool mBtnTask; + + void clearButtons(); +}; + + +/* Keeps track of cursor movements. */ + +class CursorMotionAccumulator { +public: + CursorMotionAccumulator(); + void reset(InputDevice* device); + + void process(const RawEvent* rawEvent); + void finishSync(); + + inline int32_t getRelativeX() const { return mRelX; } + inline int32_t getRelativeY() const { return mRelY; } + +private: + int32_t mRelX; + int32_t mRelY; + + void clearRelativeAxes(); +}; + + +/* Keeps track of cursor scrolling motions. */ + +class CursorScrollAccumulator { +public: + CursorScrollAccumulator(); + void configure(InputDevice* device); + void reset(InputDevice* device); + + void process(const RawEvent* rawEvent); + void finishSync(); + + inline bool haveRelativeVWheel() const { return mHaveRelWheel; } + inline bool haveRelativeHWheel() const { return mHaveRelHWheel; } + + inline int32_t getRelativeX() const { return mRelX; } + inline int32_t getRelativeY() const { return mRelY; } + inline int32_t getRelativeVWheel() const { return mRelWheel; } + inline int32_t getRelativeHWheel() const { return mRelHWheel; } + +private: + bool mHaveRelWheel; + bool mHaveRelHWheel; + + int32_t mRelX; + int32_t mRelY; + int32_t mRelWheel; + int32_t mRelHWheel; + + void clearRelativeAxes(); +}; + + +/* Keeps track of the state of touch, stylus and tool buttons. */ +class TouchButtonAccumulator { +public: + TouchButtonAccumulator(); + void configure(InputDevice* device); + void reset(InputDevice* device); + + void process(const RawEvent* rawEvent); + + uint32_t getButtonState() const; + int32_t getToolType() const; + bool isToolActive() const; + bool isHovering() const; + bool hasStylus() const; + +private: + bool mHaveBtnTouch; + bool mHaveStylus; + + bool mBtnTouch; + bool mBtnStylus; + bool mBtnStylus2; + bool mBtnToolFinger; + bool mBtnToolPen; + bool mBtnToolRubber; + bool mBtnToolBrush; + bool mBtnToolPencil; + bool mBtnToolAirbrush; + bool mBtnToolMouse; + bool mBtnToolLens; + bool mBtnToolDoubleTap; + bool mBtnToolTripleTap; + bool mBtnToolQuadTap; + + void clearButtons(); +}; + + +/* Raw axis information from the driver. */ +struct RawPointerAxes { + RawAbsoluteAxisInfo x; + RawAbsoluteAxisInfo y; + RawAbsoluteAxisInfo pressure; + RawAbsoluteAxisInfo touchMajor; + RawAbsoluteAxisInfo touchMinor; + RawAbsoluteAxisInfo toolMajor; + RawAbsoluteAxisInfo toolMinor; + RawAbsoluteAxisInfo orientation; + RawAbsoluteAxisInfo distance; + RawAbsoluteAxisInfo tiltX; + RawAbsoluteAxisInfo tiltY; + RawAbsoluteAxisInfo trackingId; + RawAbsoluteAxisInfo slot; + + RawPointerAxes(); + void clear(); +}; + + +/* Raw data for a collection of pointers including a pointer id mapping table. */ +struct RawPointerData { + struct Pointer { + uint32_t id; + int32_t x; + int32_t y; + int32_t pressure; + int32_t touchMajor; + int32_t touchMinor; + int32_t toolMajor; + int32_t toolMinor; + int32_t orientation; + int32_t distance; + int32_t tiltX; + int32_t tiltY; + int32_t toolType; // a fully decoded AMOTION_EVENT_TOOL_TYPE constant + bool isHovering; + }; + + uint32_t pointerCount; + Pointer pointers[MAX_POINTERS]; + BitSet32 hoveringIdBits, touchingIdBits; + uint32_t idToIndex[MAX_POINTER_ID + 1]; + + RawPointerData(); + void clear(); + void copyFrom(const RawPointerData& other); + void getCentroidOfTouchingPointers(float* outX, float* outY) const; + + inline void markIdBit(uint32_t id, bool isHovering) { + if (isHovering) { + hoveringIdBits.markBit(id); + } else { + touchingIdBits.markBit(id); + } + } + + inline void clearIdBits() { + hoveringIdBits.clear(); + touchingIdBits.clear(); + } + + inline const Pointer& pointerForId(uint32_t id) const { + return pointers[idToIndex[id]]; + } + + inline bool isHovering(uint32_t pointerIndex) { + return pointers[pointerIndex].isHovering; + } +}; + + +/* Cooked data for a collection of pointers including a pointer id mapping table. */ +struct CookedPointerData { + uint32_t pointerCount; + PointerProperties pointerProperties[MAX_POINTERS]; + PointerCoords pointerCoords[MAX_POINTERS]; + BitSet32 hoveringIdBits, touchingIdBits; + uint32_t idToIndex[MAX_POINTER_ID + 1]; + + CookedPointerData(); + void clear(); + void copyFrom(const CookedPointerData& other); + + inline const PointerCoords& pointerCoordsForId(uint32_t id) const { + return pointerCoords[idToIndex[id]]; + } + + inline bool isHovering(uint32_t pointerIndex) { + return hoveringIdBits.hasBit(pointerProperties[pointerIndex].id); + } +}; + + +/* Keeps track of the state of single-touch protocol. */ +class SingleTouchMotionAccumulator { +public: + SingleTouchMotionAccumulator(); + + void process(const RawEvent* rawEvent); + void reset(InputDevice* device); + + inline int32_t getAbsoluteX() const { return mAbsX; } + inline int32_t getAbsoluteY() const { return mAbsY; } + inline int32_t getAbsolutePressure() const { return mAbsPressure; } + inline int32_t getAbsoluteToolWidth() const { return mAbsToolWidth; } + inline int32_t getAbsoluteDistance() const { return mAbsDistance; } + inline int32_t getAbsoluteTiltX() const { return mAbsTiltX; } + inline int32_t getAbsoluteTiltY() const { return mAbsTiltY; } + +private: + int32_t mAbsX; + int32_t mAbsY; + int32_t mAbsPressure; + int32_t mAbsToolWidth; + int32_t mAbsDistance; + int32_t mAbsTiltX; + int32_t mAbsTiltY; + + void clearAbsoluteAxes(); +}; + + +/* Keeps track of the state of multi-touch protocol. */ +class MultiTouchMotionAccumulator { +public: + class Slot { + public: + inline bool isInUse() const { return mInUse; } + inline int32_t getX() const { return mAbsMTPositionX; } + inline int32_t getY() const { return mAbsMTPositionY; } + inline int32_t getTouchMajor() const { return mAbsMTTouchMajor; } + inline int32_t getTouchMinor() const { + return mHaveAbsMTTouchMinor ? mAbsMTTouchMinor : mAbsMTTouchMajor; } + inline int32_t getToolMajor() const { return mAbsMTWidthMajor; } + inline int32_t getToolMinor() const { + return mHaveAbsMTWidthMinor ? mAbsMTWidthMinor : mAbsMTWidthMajor; } + inline int32_t getOrientation() const { return mAbsMTOrientation; } + inline int32_t getTrackingId() const { return mAbsMTTrackingId; } + inline int32_t getPressure() const { return mAbsMTPressure; } + inline int32_t getDistance() const { return mAbsMTDistance; } + inline int32_t getToolType() const; + + private: + friend class MultiTouchMotionAccumulator; + + bool mInUse; + bool mHaveAbsMTTouchMinor; + bool mHaveAbsMTWidthMinor; + bool mHaveAbsMTToolType; + + int32_t mAbsMTPositionX; + int32_t mAbsMTPositionY; + int32_t mAbsMTTouchMajor; + int32_t mAbsMTTouchMinor; + int32_t mAbsMTWidthMajor; + int32_t mAbsMTWidthMinor; + int32_t mAbsMTOrientation; + int32_t mAbsMTTrackingId; + int32_t mAbsMTPressure; + int32_t mAbsMTDistance; + int32_t mAbsMTToolType; + + Slot(); + void clear(); + }; + + MultiTouchMotionAccumulator(); + ~MultiTouchMotionAccumulator(); + + void configure(InputDevice* device, size_t slotCount, bool usingSlotsProtocol); + void reset(InputDevice* device); + void process(const RawEvent* rawEvent); + void finishSync(); + bool hasStylus() const; + + inline size_t getSlotCount() const { return mSlotCount; } + inline const Slot* getSlot(size_t index) const { return &mSlots[index]; } + +private: + int32_t mCurrentSlot; + Slot* mSlots; + size_t mSlotCount; + bool mUsingSlotsProtocol; + bool mHaveStylus; + + void clearSlots(int32_t initialSlot); +}; + + +/* An input mapper transforms raw input events into cooked event data. + * A single input device can have multiple associated input mappers in order to interpret + * different classes of events. + * + * InputMapper lifecycle: + * - create + * - configure with 0 changes + * - reset + * - process, process, process (may occasionally reconfigure with non-zero changes or reset) + * - reset + * - destroy + */ +class InputMapper { +public: + InputMapper(InputDevice* device); + virtual ~InputMapper(); + + inline InputDevice* getDevice() { return mDevice; } + inline int32_t getDeviceId() { return mDevice->getId(); } + inline const String8 getDeviceName() { return mDevice->getName(); } + inline InputReaderContext* getContext() { return mContext; } + inline InputReaderPolicyInterface* getPolicy() { return mContext->getPolicy(); } + inline InputListenerInterface* getListener() { return mContext->getListener(); } + inline EventHubInterface* getEventHub() { return mContext->getEventHub(); } + + virtual uint32_t getSources() = 0; + virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); + virtual void dump(String8& dump); + virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes); + virtual void reset(nsecs_t when); + virtual void process(const RawEvent* rawEvent) = 0; + virtual void timeoutExpired(nsecs_t when); + + virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode); + virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); + virtual int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode); + virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes, + const int32_t* keyCodes, uint8_t* outFlags); + virtual void vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat, + int32_t token); + virtual void cancelVibrate(int32_t token); + + virtual int32_t getMetaState(); + + virtual void fadePointer(); + +protected: + InputDevice* mDevice; + InputReaderContext* mContext; + + status_t getAbsoluteAxisInfo(int32_t axis, RawAbsoluteAxisInfo* axisInfo); + void bumpGeneration(); + + static void dumpRawAbsoluteAxisInfo(String8& dump, + const RawAbsoluteAxisInfo& axis, const char* name); +}; + + +class SwitchInputMapper : public InputMapper { +public: + SwitchInputMapper(InputDevice* device); + virtual ~SwitchInputMapper(); + + virtual uint32_t getSources(); + virtual void process(const RawEvent* rawEvent); + + virtual int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode); + +private: + uint32_t mUpdatedSwitchValues; + uint32_t mUpdatedSwitchMask; + + void processSwitch(int32_t switchCode, int32_t switchValue); + void sync(nsecs_t when); +}; + + +class VibratorInputMapper : public InputMapper { +public: + VibratorInputMapper(InputDevice* device); + virtual ~VibratorInputMapper(); + + virtual uint32_t getSources(); + virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); + virtual void process(const RawEvent* rawEvent); + + virtual void vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat, + int32_t token); + virtual void cancelVibrate(int32_t token); + virtual void timeoutExpired(nsecs_t when); + virtual void dump(String8& dump); + +private: + bool mVibrating; + nsecs_t mPattern[MAX_VIBRATE_PATTERN_SIZE]; + size_t mPatternSize; + ssize_t mRepeat; + int32_t mToken; + ssize_t mIndex; + nsecs_t mNextStepTime; + + void nextStep(); + void stopVibrating(); +}; + + +class KeyboardInputMapper : public InputMapper { +public: + KeyboardInputMapper(InputDevice* device, uint32_t source, int32_t keyboardType); + virtual ~KeyboardInputMapper(); + + virtual uint32_t getSources(); + virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); + virtual void dump(String8& dump); + virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes); + virtual void reset(nsecs_t when); + virtual void process(const RawEvent* rawEvent); + + virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode); + virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); + virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes, + const int32_t* keyCodes, uint8_t* outFlags); + + virtual int32_t getMetaState(); + +private: + struct KeyDown { + int32_t keyCode; + int32_t scanCode; + }; + + uint32_t mSource; + int32_t mKeyboardType; + + int32_t mOrientation; // orientation for dpad keys + + Vector<KeyDown> mKeyDowns; // keys that are down + int32_t mMetaState; + nsecs_t mDownTime; // time of most recent key down + + int32_t mCurrentHidUsage; // most recent HID usage seen this packet, or 0 if none + + struct LedState { + bool avail; // led is available + bool on; // we think the led is currently on + }; + LedState mCapsLockLedState; + LedState mNumLockLedState; + LedState mScrollLockLedState; + + // Immutable configuration parameters. + struct Parameters { + bool hasAssociatedDisplay; + bool orientationAware; + } mParameters; + + void configureParameters(); + void dumpParameters(String8& dump); + + bool isKeyboardOrGamepadKey(int32_t scanCode); + + void processKey(nsecs_t when, bool down, int32_t keyCode, int32_t scanCode, + uint32_t policyFlags); + + ssize_t findKeyDown(int32_t scanCode); + + void resetLedState(); + void initializeLedState(LedState& ledState, int32_t led); + void updateLedState(bool reset); + void updateLedStateForModifier(LedState& ledState, int32_t led, + int32_t modifier, bool reset); +}; + + +class CursorInputMapper : public InputMapper { +public: + CursorInputMapper(InputDevice* device); + virtual ~CursorInputMapper(); + + virtual uint32_t getSources(); + virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); + virtual void dump(String8& dump); + virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes); + virtual void reset(nsecs_t when); + virtual void process(const RawEvent* rawEvent); + + virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); + + virtual void fadePointer(); + +private: + // Amount that trackball needs to move in order to generate a key event. + static const int32_t TRACKBALL_MOVEMENT_THRESHOLD = 6; + + // Immutable configuration parameters. + struct Parameters { + enum Mode { + MODE_POINTER, + MODE_NAVIGATION, + }; + + Mode mode; + bool hasAssociatedDisplay; + bool orientationAware; + } mParameters; + + CursorButtonAccumulator mCursorButtonAccumulator; + CursorMotionAccumulator mCursorMotionAccumulator; + CursorScrollAccumulator mCursorScrollAccumulator; + + int32_t mSource; + float mXScale; + float mYScale; + float mXPrecision; + float mYPrecision; + + float mVWheelScale; + float mHWheelScale; + + // Velocity controls for mouse pointer and wheel movements. + // The controls for X and Y wheel movements are separate to keep them decoupled. + VelocityControl mPointerVelocityControl; + VelocityControl mWheelXVelocityControl; + VelocityControl mWheelYVelocityControl; + + int32_t mOrientation; + + sp<PointerControllerInterface> mPointerController; + + int32_t mButtonState; + nsecs_t mDownTime; + + void configureParameters(); + void dumpParameters(String8& dump); + + void sync(nsecs_t when); +}; + + +class TouchInputMapper : public InputMapper { +public: + TouchInputMapper(InputDevice* device); + virtual ~TouchInputMapper(); + + virtual uint32_t getSources(); + virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); + virtual void dump(String8& dump); + virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes); + virtual void reset(nsecs_t when); + virtual void process(const RawEvent* rawEvent); + + virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode); + virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode); + virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes, + const int32_t* keyCodes, uint8_t* outFlags); + + virtual void fadePointer(); + virtual void timeoutExpired(nsecs_t when); + +protected: + CursorButtonAccumulator mCursorButtonAccumulator; + CursorScrollAccumulator mCursorScrollAccumulator; + TouchButtonAccumulator mTouchButtonAccumulator; + + struct VirtualKey { + int32_t keyCode; + int32_t scanCode; + uint32_t flags; + + // computed hit box, specified in touch screen coords based on known display size + int32_t hitLeft; + int32_t hitTop; + int32_t hitRight; + int32_t hitBottom; + + inline bool isHit(int32_t x, int32_t y) const { + return x >= hitLeft && x <= hitRight && y >= hitTop && y <= hitBottom; + } + }; + + // Input sources and device mode. + uint32_t mSource; + + enum DeviceMode { + DEVICE_MODE_DISABLED, // input is disabled + DEVICE_MODE_DIRECT, // direct mapping (touchscreen) + DEVICE_MODE_UNSCALED, // unscaled mapping (touchpad) + DEVICE_MODE_NAVIGATION, // unscaled mapping with assist gesture (touch navigation) + DEVICE_MODE_POINTER, // pointer mapping (pointer) + }; + DeviceMode mDeviceMode; + + // The reader's configuration. + InputReaderConfiguration mConfig; + + // Immutable configuration parameters. + struct Parameters { + enum DeviceType { + DEVICE_TYPE_TOUCH_SCREEN, + DEVICE_TYPE_TOUCH_PAD, + DEVICE_TYPE_TOUCH_NAVIGATION, + DEVICE_TYPE_POINTER, + }; + + DeviceType deviceType; + bool hasAssociatedDisplay; + bool associatedDisplayIsExternal; + bool orientationAware; + + enum GestureMode { + GESTURE_MODE_POINTER, + GESTURE_MODE_SPOTS, + }; + GestureMode gestureMode; + } mParameters; + + // Immutable calibration parameters in parsed form. + struct Calibration { + // Size + enum SizeCalibration { + SIZE_CALIBRATION_DEFAULT, + SIZE_CALIBRATION_NONE, + SIZE_CALIBRATION_GEOMETRIC, + SIZE_CALIBRATION_DIAMETER, + SIZE_CALIBRATION_BOX, + SIZE_CALIBRATION_AREA, + }; + + SizeCalibration sizeCalibration; + + bool haveSizeScale; + float sizeScale; + bool haveSizeBias; + float sizeBias; + bool haveSizeIsSummed; + bool sizeIsSummed; + + // Pressure + enum PressureCalibration { + PRESSURE_CALIBRATION_DEFAULT, + PRESSURE_CALIBRATION_NONE, + PRESSURE_CALIBRATION_PHYSICAL, + PRESSURE_CALIBRATION_AMPLITUDE, + }; + + PressureCalibration pressureCalibration; + bool havePressureScale; + float pressureScale; + + // Orientation + enum OrientationCalibration { + ORIENTATION_CALIBRATION_DEFAULT, + ORIENTATION_CALIBRATION_NONE, + ORIENTATION_CALIBRATION_INTERPOLATED, + ORIENTATION_CALIBRATION_VECTOR, + }; + + OrientationCalibration orientationCalibration; + + // Distance + enum DistanceCalibration { + DISTANCE_CALIBRATION_DEFAULT, + DISTANCE_CALIBRATION_NONE, + DISTANCE_CALIBRATION_SCALED, + }; + + DistanceCalibration distanceCalibration; + bool haveDistanceScale; + float distanceScale; + + enum CoverageCalibration { + COVERAGE_CALIBRATION_DEFAULT, + COVERAGE_CALIBRATION_NONE, + COVERAGE_CALIBRATION_BOX, + }; + + CoverageCalibration coverageCalibration; + + inline void applySizeScaleAndBias(float* outSize) const { + if (haveSizeScale) { + *outSize *= sizeScale; + } + if (haveSizeBias) { + *outSize += sizeBias; + } + } + } mCalibration; + + // Raw pointer axis information from the driver. + RawPointerAxes mRawPointerAxes; + + // Raw pointer sample data. + RawPointerData mCurrentRawPointerData; + RawPointerData mLastRawPointerData; + + // Cooked pointer sample data. + CookedPointerData mCurrentCookedPointerData; + CookedPointerData mLastCookedPointerData; + + // Button state. + int32_t mCurrentButtonState; + int32_t mLastButtonState; + + // Scroll state. + int32_t mCurrentRawVScroll; + int32_t mCurrentRawHScroll; + + // Id bits used to differentiate fingers, stylus and mouse tools. + BitSet32 mCurrentFingerIdBits; // finger or unknown + BitSet32 mLastFingerIdBits; + BitSet32 mCurrentStylusIdBits; // stylus or eraser + BitSet32 mLastStylusIdBits; + BitSet32 mCurrentMouseIdBits; // mouse or lens + BitSet32 mLastMouseIdBits; + + // True if we sent a HOVER_ENTER event. + bool mSentHoverEnter; + + // The time the primary pointer last went down. + nsecs_t mDownTime; + + // The pointer controller, or null if the device is not a pointer. + sp<PointerControllerInterface> mPointerController; + + Vector<VirtualKey> mVirtualKeys; + + virtual void configureParameters(); + virtual void dumpParameters(String8& dump); + virtual void configureRawPointerAxes(); + virtual void dumpRawPointerAxes(String8& dump); + virtual void configureSurface(nsecs_t when, bool* outResetNeeded); + virtual void dumpSurface(String8& dump); + virtual void configureVirtualKeys(); + virtual void dumpVirtualKeys(String8& dump); + virtual void parseCalibration(); + virtual void resolveCalibration(); + virtual void dumpCalibration(String8& dump); + virtual bool hasStylus() const = 0; + + virtual void syncTouch(nsecs_t when, bool* outHavePointerIds) = 0; + +private: + // The current viewport. + // The components of the viewport are specified in the display's rotated orientation. + DisplayViewport mViewport; + + // The surface orientation, width and height set by configureSurface(). + // The width and height are derived from the viewport but are specified + // in the natural orientation. + // The surface origin specifies how the surface coordinates should be translated + // to align with the logical display coordinate space. + // The orientation may be different from the viewport orientation as it specifies + // the rotation of the surface coordinates required to produce the viewport's + // requested orientation, so it will depend on whether the device is orientation aware. + int32_t mSurfaceWidth; + int32_t mSurfaceHeight; + int32_t mSurfaceLeft; + int32_t mSurfaceTop; + int32_t mSurfaceOrientation; + + // Translation and scaling factors, orientation-independent. + float mXTranslate; + float mXScale; + float mXPrecision; + + float mYTranslate; + float mYScale; + float mYPrecision; + + float mGeometricScale; + + float mPressureScale; + + float mSizeScale; + + float mOrientationScale; + + float mDistanceScale; + + bool mHaveTilt; + float mTiltXCenter; + float mTiltXScale; + float mTiltYCenter; + float mTiltYScale; + + // Oriented motion ranges for input device info. + struct OrientedRanges { + InputDeviceInfo::MotionRange x; + InputDeviceInfo::MotionRange y; + InputDeviceInfo::MotionRange pressure; + + bool haveSize; + InputDeviceInfo::MotionRange size; + + bool haveTouchSize; + InputDeviceInfo::MotionRange touchMajor; + InputDeviceInfo::MotionRange touchMinor; + + bool haveToolSize; + InputDeviceInfo::MotionRange toolMajor; + InputDeviceInfo::MotionRange toolMinor; + + bool haveOrientation; + InputDeviceInfo::MotionRange orientation; + + bool haveDistance; + InputDeviceInfo::MotionRange distance; + + bool haveTilt; + InputDeviceInfo::MotionRange tilt; + + OrientedRanges() { + clear(); + } + + void clear() { + haveSize = false; + haveTouchSize = false; + haveToolSize = false; + haveOrientation = false; + haveDistance = false; + haveTilt = false; + } + } mOrientedRanges; + + // Oriented dimensions and precision. + float mOrientedXPrecision; + float mOrientedYPrecision; + + struct CurrentVirtualKeyState { + bool down; + bool ignored; + nsecs_t downTime; + int32_t keyCode; + int32_t scanCode; + } mCurrentVirtualKey; + + // Scale factor for gesture or mouse based pointer movements. + float mPointerXMovementScale; + float mPointerYMovementScale; + + // Scale factor for gesture based zooming and other freeform motions. + float mPointerXZoomScale; + float mPointerYZoomScale; + + // The maximum swipe width. + float mPointerGestureMaxSwipeWidth; + + struct PointerDistanceHeapElement { + uint32_t currentPointerIndex : 8; + uint32_t lastPointerIndex : 8; + uint64_t distance : 48; // squared distance + }; + + enum PointerUsage { + POINTER_USAGE_NONE, + POINTER_USAGE_GESTURES, + POINTER_USAGE_STYLUS, + POINTER_USAGE_MOUSE, + }; + PointerUsage mPointerUsage; + + struct PointerGesture { + enum Mode { + // No fingers, button is not pressed. + // Nothing happening. + NEUTRAL, + + // No fingers, button is not pressed. + // Tap detected. + // Emits DOWN and UP events at the pointer location. + TAP, + + // Exactly one finger dragging following a tap. + // Pointer follows the active finger. + // Emits DOWN, MOVE and UP events at the pointer location. + // + // Detect double-taps when the finger goes up while in TAP_DRAG mode. + TAP_DRAG, + + // Button is pressed. + // Pointer follows the active finger if there is one. Other fingers are ignored. + // Emits DOWN, MOVE and UP events at the pointer location. + BUTTON_CLICK_OR_DRAG, + + // Exactly one finger, button is not pressed. + // Pointer follows the active finger. + // Emits HOVER_MOVE events at the pointer location. + // + // Detect taps when the finger goes up while in HOVER mode. + HOVER, + + // Exactly two fingers but neither have moved enough to clearly indicate + // whether a swipe or freeform gesture was intended. We consider the + // pointer to be pressed so this enables clicking or long-pressing on buttons. + // Pointer does not move. + // Emits DOWN, MOVE and UP events with a single stationary pointer coordinate. + PRESS, + + // Exactly two fingers moving in the same direction, button is not pressed. + // Pointer does not move. + // Emits DOWN, MOVE and UP events with a single pointer coordinate that + // follows the midpoint between both fingers. + SWIPE, + + // Two or more fingers moving in arbitrary directions, button is not pressed. + // Pointer does not move. + // Emits DOWN, POINTER_DOWN, MOVE, POINTER_UP and UP events that follow + // each finger individually relative to the initial centroid of the finger. + FREEFORM, + + // Waiting for quiet time to end before starting the next gesture. + QUIET, + }; + + // Time the first finger went down. + nsecs_t firstTouchTime; + + // The active pointer id from the raw touch data. + int32_t activeTouchId; // -1 if none + + // The active pointer id from the gesture last delivered to the application. + int32_t activeGestureId; // -1 if none + + // Pointer coords and ids for the current and previous pointer gesture. + Mode currentGestureMode; + BitSet32 currentGestureIdBits; + uint32_t currentGestureIdToIndex[MAX_POINTER_ID + 1]; + PointerProperties currentGestureProperties[MAX_POINTERS]; + PointerCoords currentGestureCoords[MAX_POINTERS]; + + Mode lastGestureMode; + BitSet32 lastGestureIdBits; + uint32_t lastGestureIdToIndex[MAX_POINTER_ID + 1]; + PointerProperties lastGestureProperties[MAX_POINTERS]; + PointerCoords lastGestureCoords[MAX_POINTERS]; + + // Time the pointer gesture last went down. + nsecs_t downTime; + + // Time when the pointer went down for a TAP. + nsecs_t tapDownTime; + + // Time when the pointer went up for a TAP. + nsecs_t tapUpTime; + + // Location of initial tap. + float tapX, tapY; + + // Time we started waiting for quiescence. + nsecs_t quietTime; + + // Reference points for multitouch gestures. + float referenceTouchX; // reference touch X/Y coordinates in surface units + float referenceTouchY; + float referenceGestureX; // reference gesture X/Y coordinates in pixels + float referenceGestureY; + + // Distance that each pointer has traveled which has not yet been + // subsumed into the reference gesture position. + BitSet32 referenceIdBits; + struct Delta { + float dx, dy; + }; + Delta referenceDeltas[MAX_POINTER_ID + 1]; + + // Describes how touch ids are mapped to gesture ids for freeform gestures. + uint32_t freeformTouchToGestureIdMap[MAX_POINTER_ID + 1]; + + // A velocity tracker for determining whether to switch active pointers during drags. + VelocityTracker velocityTracker; + + void reset() { + firstTouchTime = LLONG_MIN; + activeTouchId = -1; + activeGestureId = -1; + currentGestureMode = NEUTRAL; + currentGestureIdBits.clear(); + lastGestureMode = NEUTRAL; + lastGestureIdBits.clear(); + downTime = 0; + velocityTracker.clear(); + resetTap(); + resetQuietTime(); + } + + void resetTap() { + tapDownTime = LLONG_MIN; + tapUpTime = LLONG_MIN; + } + + void resetQuietTime() { + quietTime = LLONG_MIN; + } + } mPointerGesture; + + struct PointerSimple { + PointerCoords currentCoords; + PointerProperties currentProperties; + PointerCoords lastCoords; + PointerProperties lastProperties; + + // True if the pointer is down. + bool down; + + // True if the pointer is hovering. + bool hovering; + + // Time the pointer last went down. + nsecs_t downTime; + + void reset() { + currentCoords.clear(); + currentProperties.clear(); + lastCoords.clear(); + lastProperties.clear(); + down = false; + hovering = false; + downTime = 0; + } + } mPointerSimple; + + // The pointer and scroll velocity controls. + VelocityControl mPointerVelocityControl; + VelocityControl mWheelXVelocityControl; + VelocityControl mWheelYVelocityControl; + + void sync(nsecs_t when); + + bool consumeRawTouches(nsecs_t when, uint32_t policyFlags); + void dispatchVirtualKey(nsecs_t when, uint32_t policyFlags, + int32_t keyEventAction, int32_t keyEventFlags); + + void dispatchTouches(nsecs_t when, uint32_t policyFlags); + void dispatchHoverExit(nsecs_t when, uint32_t policyFlags); + void dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags); + void cookPointerData(); + + void dispatchPointerUsage(nsecs_t when, uint32_t policyFlags, PointerUsage pointerUsage); + void abortPointerUsage(nsecs_t when, uint32_t policyFlags); + + void dispatchPointerGestures(nsecs_t when, uint32_t policyFlags, bool isTimeout); + void abortPointerGestures(nsecs_t when, uint32_t policyFlags); + bool preparePointerGestures(nsecs_t when, + bool* outCancelPreviousGesture, bool* outFinishPreviousGesture, + bool isTimeout); + + void dispatchPointerStylus(nsecs_t when, uint32_t policyFlags); + void abortPointerStylus(nsecs_t when, uint32_t policyFlags); + + void dispatchPointerMouse(nsecs_t when, uint32_t policyFlags); + void abortPointerMouse(nsecs_t when, uint32_t policyFlags); + + void dispatchPointerSimple(nsecs_t when, uint32_t policyFlags, + bool down, bool hovering); + void abortPointerSimple(nsecs_t when, uint32_t policyFlags); + + // Dispatches a motion event. + // If the changedId is >= 0 and the action is POINTER_DOWN or POINTER_UP, the + // method will take care of setting the index and transmuting the action to DOWN or UP + // it is the first / last pointer to go down / up. + void dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source, + int32_t action, int32_t flags, int32_t metaState, int32_t buttonState, + int32_t edgeFlags, + const PointerProperties* properties, const PointerCoords* coords, + const uint32_t* idToIndex, BitSet32 idBits, + int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime); + + // Updates pointer coords and properties for pointers with specified ids that have moved. + // Returns true if any of them changed. + bool updateMovedPointers(const PointerProperties* inProperties, + const PointerCoords* inCoords, const uint32_t* inIdToIndex, + PointerProperties* outProperties, PointerCoords* outCoords, + const uint32_t* outIdToIndex, BitSet32 idBits) const; + + bool isPointInsideSurface(int32_t x, int32_t y); + const VirtualKey* findVirtualKeyHit(int32_t x, int32_t y); + + void assignPointerIds(); +}; + + +class SingleTouchInputMapper : public TouchInputMapper { +public: + SingleTouchInputMapper(InputDevice* device); + virtual ~SingleTouchInputMapper(); + + virtual void reset(nsecs_t when); + virtual void process(const RawEvent* rawEvent); + +protected: + virtual void syncTouch(nsecs_t when, bool* outHavePointerIds); + virtual void configureRawPointerAxes(); + virtual bool hasStylus() const; + +private: + SingleTouchMotionAccumulator mSingleTouchMotionAccumulator; +}; + + +class MultiTouchInputMapper : public TouchInputMapper { +public: + MultiTouchInputMapper(InputDevice* device); + virtual ~MultiTouchInputMapper(); + + virtual void reset(nsecs_t when); + virtual void process(const RawEvent* rawEvent); + +protected: + virtual void syncTouch(nsecs_t when, bool* outHavePointerIds); + virtual void configureRawPointerAxes(); + virtual bool hasStylus() const; + +private: + MultiTouchMotionAccumulator mMultiTouchMotionAccumulator; + + // Specifies the pointer id bits that are in use, and their associated tracking id. + BitSet32 mPointerIdBits; + int32_t mPointerTrackingIdMap[MAX_POINTER_ID + 1]; +}; + + +class JoystickInputMapper : public InputMapper { +public: + JoystickInputMapper(InputDevice* device); + virtual ~JoystickInputMapper(); + + virtual uint32_t getSources(); + virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo); + virtual void dump(String8& dump); + virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes); + virtual void reset(nsecs_t when); + virtual void process(const RawEvent* rawEvent); + +private: + struct Axis { + RawAbsoluteAxisInfo rawAxisInfo; + AxisInfo axisInfo; + + bool explicitlyMapped; // true if the axis was explicitly assigned an axis id + + float scale; // scale factor from raw to normalized values + float offset; // offset to add after scaling for normalization + float highScale; // scale factor from raw to normalized values of high split + float highOffset; // offset to add after scaling for normalization of high split + + float min; // normalized inclusive minimum + float max; // normalized inclusive maximum + float flat; // normalized flat region size + float fuzz; // normalized error tolerance + float resolution; // normalized resolution in units/mm + + float filter; // filter out small variations of this size + float currentValue; // current value + float newValue; // most recent value + float highCurrentValue; // current value of high split + float highNewValue; // most recent value of high split + + void initialize(const RawAbsoluteAxisInfo& rawAxisInfo, const AxisInfo& axisInfo, + bool explicitlyMapped, float scale, float offset, + float highScale, float highOffset, + float min, float max, float flat, float fuzz, float resolution) { + this->rawAxisInfo = rawAxisInfo; + this->axisInfo = axisInfo; + this->explicitlyMapped = explicitlyMapped; + this->scale = scale; + this->offset = offset; + this->highScale = highScale; + this->highOffset = highOffset; + this->min = min; + this->max = max; + this->flat = flat; + this->fuzz = fuzz; + this->resolution = resolution; + this->filter = 0; + resetValue(); + } + + void resetValue() { + this->currentValue = 0; + this->newValue = 0; + this->highCurrentValue = 0; + this->highNewValue = 0; + } + }; + + // Axes indexed by raw ABS_* axis index. + KeyedVector<int32_t, Axis> mAxes; + + void sync(nsecs_t when, bool force); + + bool haveAxis(int32_t axisId); + void pruneAxes(bool ignoreExplicitlyMappedAxes); + bool filterAxes(bool force); + + static bool hasValueChangedSignificantly(float filter, + float newValue, float currentValue, float min, float max); + static bool hasMovedNearerToValueWithinFilteredRange(float filter, + float newValue, float currentValue, float thresholdValue); + + static bool isCenteredAxis(int32_t axis); + static int32_t getCompatAxis(int32_t axis); + + static void addMotionRange(int32_t axisId, const Axis& axis, InputDeviceInfo* info); + static void setPointerCoordsAxisValue(PointerCoords* pointerCoords, int32_t axis, + float value); +}; + +} // namespace android + +#endif // _UI_INPUT_READER_H |