replicant-frameworks_native/include/ui/Input.h
Jeff Brown 54bc281639 More work in progress on native events.
Refactored the code to eliminate potential deadlocks due to re-entrant
calls from the policy into the dispatcher.  Also added some plumbing
that will be used to notify the framework about ANRs.

Change-Id: Iba7a10de0cb3c56cd7520d6ce716db52fdcc94ff
2010-06-15 16:43:18 -07:00

342 lines
8.9 KiB
C++

/*
* 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_H
#define _UI_INPUT_H
/**
* Native input event structures.
*/
#include <android/input.h>
#include <utils/Vector.h>
#include <utils/Timers.h>
/*
* Additional private constants not defined in ndk/ui/input.h.
*/
enum {
/*
* Private control to determine when an app is tracking a key sequence.
*/
KEY_EVENT_FLAG_START_TRACKING = 0x40000000
};
/*
* Maximum number of pointers supported per motion event.
*/
#define MAX_POINTERS 10
namespace android {
/*
* A raw event as retrieved from the EventHub.
*/
struct RawEvent {
nsecs_t when;
int32_t deviceId;
int32_t type;
int32_t scanCode;
int32_t keyCode;
int32_t value;
uint32_t flags;
};
/*
* Flags that flow alongside events in the input dispatch system to help with certain
* policy decisions such as waking from device sleep.
*
* TODO This enumeration should probably be split up or relabeled for clarity.
*/
enum {
/* These flags originate in RawEvents and are generally set in the key map. */
POLICY_FLAG_WAKE = 0x00000001,
POLICY_FLAG_WAKE_DROPPED = 0x00000002,
POLICY_FLAG_SHIFT = 0x00000004,
POLICY_FLAG_CAPS_LOCK = 0x00000008,
POLICY_FLAG_ALT = 0x00000010,
POLICY_FLAG_ALT_GR = 0x00000020,
POLICY_FLAG_MENU = 0x00000040,
POLICY_FLAG_LAUNCHER = 0x00000080,
/* These flags are set by the input reader policy as it intercepts each event. */
// Indicates that the screen was off when the event was received and the event
// should wake the device.
POLICY_FLAG_WOKE_HERE = 0x10000000,
// Indicates that the screen was dim when the event was received and the event
// should brighten the device.
POLICY_FLAG_BRIGHT_HERE = 0x20000000,
};
/*
* Describes the basic configuration of input devices that are present.
*/
struct InputConfiguration {
enum {
TOUCHSCREEN_UNDEFINED = 0,
TOUCHSCREEN_NOTOUCH = 1,
TOUCHSCREEN_STYLUS = 2,
TOUCHSCREEN_FINGER = 3
};
enum {
KEYBOARD_UNDEFINED = 0,
KEYBOARD_NOKEYS = 1,
KEYBOARD_QWERTY = 2,
KEYBOARD_12KEY = 3
};
enum {
NAVIGATION_UNDEFINED = 0,
NAVIGATION_NONAV = 1,
NAVIGATION_DPAD = 2,
NAVIGATION_TRACKBALL = 3,
NAVIGATION_WHEEL = 4
};
int32_t touchScreen;
int32_t keyboard;
int32_t navigation;
};
/*
* Pointer coordinate data.
*/
struct PointerCoords {
float x;
float y;
float pressure;
float size;
};
/*
* Input events.
*/
struct input_event_t { };
class InputEvent : public input_event_t {
public:
virtual ~InputEvent() { }
virtual int32_t getType() const = 0;
inline int32_t getDeviceId() const { return mDeviceId; }
inline int32_t getNature() const { return mNature; }
protected:
void initialize(int32_t deviceId, int32_t nature);
private:
int32_t mDeviceId;
int32_t mNature;
};
class KeyEvent : public InputEvent {
public:
virtual ~KeyEvent() { }
virtual int32_t getType() const { return INPUT_EVENT_TYPE_KEY; }
inline int32_t getAction() const { return mAction; }
inline int32_t getFlags() const { return mFlags; }
inline int32_t getKeyCode() const { return mKeyCode; }
inline int32_t getScanCode() const { return mScanCode; }
inline int32_t getMetaState() const { return mMetaState; }
inline int32_t getRepeatCount() const { return mRepeatCount; }
inline nsecs_t getDownTime() const { return mDownTime; }
inline nsecs_t getEventTime() const { return mEventTime; }
void initialize(
int32_t deviceId,
int32_t nature,
int32_t action,
int32_t flags,
int32_t keyCode,
int32_t scanCode,
int32_t metaState,
int32_t repeatCount,
nsecs_t downTime,
nsecs_t eventTime);
private:
int32_t mAction;
int32_t mFlags;
int32_t mKeyCode;
int32_t mScanCode;
int32_t mMetaState;
int32_t mRepeatCount;
nsecs_t mDownTime;
nsecs_t mEventTime;
};
class MotionEvent : public InputEvent {
public:
virtual ~MotionEvent() { }
virtual int32_t getType() const { return INPUT_EVENT_TYPE_MOTION; }
inline int32_t getAction() const { return mAction; }
inline int32_t getEdgeFlags() const { return mEdgeFlags; }
inline int32_t getMetaState() const { return mMetaState; }
inline float getXPrecision() const { return mXPrecision; }
inline float getYPrecision() const { return mYPrecision; }
inline nsecs_t getDownTime() const { return mDownTime; }
inline size_t getPointerCount() const { return mPointerIds.size(); }
inline int32_t getPointerId(size_t pointerIndex) const { return mPointerIds[pointerIndex]; }
inline nsecs_t getEventTime() const { return mSampleEventTimes[getHistorySize()]; }
inline float getRawX() const { return mRawX; }
inline float getRawY() const { return mRawY; }
inline float getX(size_t pointerIndex) const {
return getCurrentPointerCoords(pointerIndex).x;
}
inline float getY(size_t pointerIndex) const {
return getCurrentPointerCoords(pointerIndex).y;
}
inline float getPressure(size_t pointerIndex) const {
return getCurrentPointerCoords(pointerIndex).pressure;
}
inline float getSize(size_t pointerIndex) const {
return getCurrentPointerCoords(pointerIndex).size;
}
inline size_t getHistorySize() const { return mSampleEventTimes.size() - 1; }
inline nsecs_t getHistoricalEventTime(size_t historicalIndex) const {
return mSampleEventTimes[historicalIndex];
}
inline float getHistoricalX(size_t pointerIndex, size_t historicalIndex) const {
return getHistoricalPointerCoords(pointerIndex, historicalIndex).x;
}
inline float getHistoricalY(size_t pointerIndex, size_t historicalIndex) const {
return getHistoricalPointerCoords(pointerIndex, historicalIndex).y;
}
inline float getHistoricalPressure(size_t pointerIndex, size_t historicalIndex) const {
return getHistoricalPointerCoords(pointerIndex, historicalIndex).pressure;
}
inline float getHistoricalSize(size_t pointerIndex, size_t historicalIndex) const {
return getHistoricalPointerCoords(pointerIndex, historicalIndex).size;
}
void initialize(
int32_t deviceId,
int32_t nature,
int32_t action,
int32_t edgeFlags,
int32_t metaState,
float rawX,
float rawY,
float xPrecision,
float yPrecision,
nsecs_t downTime,
nsecs_t eventTime,
size_t pointerCount,
const int32_t* pointerIds,
const PointerCoords* pointerCoords);
void addSample(
nsecs_t eventTime,
const PointerCoords* pointerCoords);
void offsetLocation(float xOffset, float yOffset);
private:
int32_t mAction;
int32_t mEdgeFlags;
int32_t mMetaState;
float mRawX;
float mRawY;
float mXPrecision;
float mYPrecision;
nsecs_t mDownTime;
Vector<int32_t> mPointerIds;
Vector<nsecs_t> mSampleEventTimes;
Vector<PointerCoords> mSamplePointerCoords;
inline const PointerCoords& getCurrentPointerCoords(size_t pointerIndex) const {
return mSamplePointerCoords[getHistorySize() * getPointerCount() + pointerIndex];
}
inline const PointerCoords& getHistoricalPointerCoords(
size_t pointerIndex, size_t historicalIndex) const {
return mSamplePointerCoords[historicalIndex * getPointerCount() + pointerIndex];
}
};
/*
* Input event factory.
*/
class InputEventFactoryInterface {
protected:
virtual ~InputEventFactoryInterface() { }
public:
InputEventFactoryInterface() { }
virtual KeyEvent* createKeyEvent() = 0;
virtual MotionEvent* createMotionEvent() = 0;
};
/*
* A simple input event factory implementation that uses a single preallocated instance
* of each type of input event that are reused for each request.
*/
class PreallocatedInputEventFactory : public InputEventFactoryInterface {
public:
PreallocatedInputEventFactory() { }
virtual ~PreallocatedInputEventFactory() { }
virtual KeyEvent* createKeyEvent() { return & mKeyEvent; }
virtual MotionEvent* createMotionEvent() { return & mMotionEvent; }
private:
KeyEvent mKeyEvent;
MotionEvent mMotionEvent;
};
} // namespace android
#endif // _UI_INPUT_H