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/*
* Copyright (C) 2005 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 _RUNTIME_EVENT_HUB_H
#define _RUNTIME_EVENT_HUB_H
#include <utils/String8.h>
#include <utils/threads.h>
#include <utils/Log.h>
#include <utils/threads.h>
#include <utils/List.h>
#include <utils/Errors.h>
#include <linux/input.h>
struct pollfd;
namespace android {
class KeyLayoutMap;
/*
* Grand Central Station for events. With a single call to waitEvent()
* you can wait for:
* - input events from the keypad of a real device
* - input events and meta-events (e.g. "quit") from the simulator
* - synthetic events from the runtime (e.g. "URL fetch completed")
* - real or forged "vsync" events
*
* Do not instantiate this class. Instead, call startUp().
*/
class EventHub : public RefBase
{
public:
EventHub();
status_t errorCheck() const;
// bit fields for classes of devices.
enum {
CLASS_KEYBOARD = 0x00000001,
CLASS_ALPHAKEY = 0x00000002,
CLASS_TOUCHSCREEN = 0x00000004,
CLASS_TRACKBALL = 0x00000008,
CLASS_TOUCHSCREEN_MT= 0x00000010,
CLASS_DPAD = 0x00000020
};
uint32_t getDeviceClasses(int32_t deviceId) const;
String8 getDeviceName(int32_t deviceId) const;
int getAbsoluteInfo(int32_t deviceId, int axis, int *outMinValue,
int* outMaxValue, int* outFlat, int* outFuzz) const;
int getSwitchState(int sw) const;
int getSwitchState(int32_t deviceId, int sw) const;
int getScancodeState(int key) const;
int getScancodeState(int32_t deviceId, int key) const;
int getKeycodeState(int key) const;
int getKeycodeState(int32_t deviceId, int key) const;
status_t scancodeToKeycode(int32_t deviceId, int scancode,
int32_t* outKeycode, uint32_t* outFlags) const;
// exclude a particular device from opening
// this can be used to ignore input devices for sensors
void addExcludedDevice(const char* deviceName);
// special type codes when devices are added/removed.
enum {
DEVICE_ADDED = 0x10000000,
DEVICE_REMOVED = 0x20000000
};
// examine key input devices for specific framework keycode support
bool hasKeys(size_t numCodes, int32_t* keyCodes, uint8_t* outFlags);
virtual bool getEvent(int32_t* outDeviceId, int32_t* outType,
int32_t* outScancode, int32_t* outKeycode, uint32_t *outFlags,
int32_t* outValue, nsecs_t* outWhen);
protected:
virtual ~EventHub();
private:
bool openPlatformInput(void);
int32_t convertDeviceKey_TI_P2(int code);
int open_device(const char *device);
int close_device(const char *device);
int scan_dir(const char *dirname);
int read_notify(int nfd);
status_t mError;
struct device_t {
const int32_t id;
const String8 path;
String8 name;
uint32_t classes;
uint8_t* keyBitmask;
KeyLayoutMap* layoutMap;
String8 keylayoutFilename;
device_t* next;
device_t(int32_t _id, const char* _path, const char* name);
~device_t();
};
device_t* getDevice(int32_t deviceId) const;
bool hasKeycode(device_t* device, int keycode) const;
// Protect all internal state.
mutable Mutex mLock;
bool mHaveFirstKeyboard;
int32_t mFirstKeyboardId; // the API is that the built-in keyboard is id 0, so map it
struct device_ent {
device_t* device;
uint32_t seq;
};
device_ent *mDevicesById;
int mNumDevicesById;
device_t *mOpeningDevices;
device_t *mClosingDevices;
device_t **mDevices;
struct pollfd *mFDs;
int mFDCount;
bool mOpened;
List<String8> mExcludedDevices;
// device ids that report particular switches.
#ifdef EV_SW
int32_t mSwitches[SW_MAX+1];
#endif
};
}; // namespace android
#endif // _RUNTIME_EVENT_HUB_H
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