Mouse pointer integration.

    float               ydpi;

};

/* Display orientations as defined in Surface.java and ISurfaceComposer.h. */

enum {

    DISPLAY_ORIENTATION_0 = 0,

    DISPLAY_ORIENTATION_90 = 1,

    DISPLAY_ORIENTATION_180 = 2,

    DISPLAY_ORIENTATION_270 = 3

};

}; // namespace android

#endif // ANDROID_COMPOSER_DISPLAY_INFO_H

/*

 * 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 <ui/Input.h>

#include <ui/Keyboard.h>

#include <ui/KeyLayoutMap.h>

#include <ui/KeyCharacterMap.h>

#include <ui/VirtualKeyMap.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 <utils/PropertyMap.h>

#include <utils/Vector.h>

#include <linux/input.h>

/* These constants are not defined in linux/input.h but they are part of the multitouch

 * input protocol. */

#define ABS_MT_TOUCH_MAJOR 0x30  /* Major axis of touching ellipse */

#define ABS_MT_TOUCH_MINOR 0x31  /* Minor axis (omit if circular) */

#define ABS_MT_WIDTH_MAJOR 0x32  /* Major axis of approaching ellipse */

#define ABS_MT_WIDTH_MINOR 0x33  /* Minor axis (omit if circular) */

#define ABS_MT_ORIENTATION 0x34  /* Ellipse orientation */

#define ABS_MT_POSITION_X 0x35   /* Center X ellipse position */

#define ABS_MT_POSITION_Y 0x36   /* Center Y ellipse position */

#define ABS_MT_TOOL_TYPE 0x37    /* Type of touching device (finger, pen, ...) */

#define ABS_MT_BLOB_ID 0x38      /* Group a set of packets as a blob */

#define ABS_MT_TRACKING_ID 0x39  /* Unique ID of initiated contact */

#define ABS_MT_PRESSURE 0x3a     /* Pressure on contact area */

#define MT_TOOL_FINGER 0 /* Identifies a finger */

#define MT_TOOL_PEN 1    /* Identifies a pen */

#define SYN_MT_REPORT 2

/* Convenience constants. */

#define BTN_FIRST 0x100  // first button scancode

#define BTN_LAST 0x15f   // last button scancode

struct pollfd;

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;

};

/* Describes an absolute axis. */

struct RawAbsoluteAxisInfo {

    bool valid; // true if the information is valid, false otherwise

    int32_t minValue;  // minimum value

    int32_t maxValue;  // maximum value

    int32_t flat;      // center flat position, eg. flat == 8 means center is between -8 and 8

    int32_t fuzz;      // error tolerance, eg. fuzz == 4 means value is +/- 4 due to noise

    inline int32_t getRange() { return maxValue - minValue; }

    inline void clear() {

        valid = false;

        minValue = 0;

        maxValue = 0;

        flat = 0;

        fuzz = 0;

    }

};

/*

 * Input device classes.

 */

enum {

    /* The input device is a keyboard. */

    INPUT_DEVICE_CLASS_KEYBOARD      = 0x00000001,

    /* The input device is an alpha-numeric keyboard (not just a dial pad). */

    INPUT_DEVICE_CLASS_ALPHAKEY      = 0x00000002,

    /* The input device is a touchscreen (either single-touch or multi-touch). */

    INPUT_DEVICE_CLASS_TOUCHSCREEN   = 0x00000004,

    /* The input device is a cursor device such as a trackball or mouse. */

    INPUT_DEVICE_CLASS_CURSOR        = 0x00000008,

    /* The input device is a multi-touch touchscreen. */

    INPUT_DEVICE_CLASS_TOUCHSCREEN_MT= 0x00000010,

    /* The input device is a directional pad (implies keyboard, has DPAD keys). */

    INPUT_DEVICE_CLASS_DPAD          = 0x00000020,

    /* The input device is a gamepad (implies keyboard, has BUTTON keys). */

    INPUT_DEVICE_CLASS_GAMEPAD       = 0x00000040,

    /* The input device has switches. */

    INPUT_DEVICE_CLASS_SWITCH        = 0x00000080,

};

/*

 * Grand Central Station for events.

 *

 * The event hub aggregates input events received across all known input

 * devices on the system, including devices that may be emulated by the simulator

 * environment.  In addition, the event hub generates fake input events to indicate

 * when devices are added or removed.

 *

 * The event hub provies a stream of input events (via the getEvent function).

 * It also supports querying the current actual state of input devices such as identifying

 * which keys are currently down.  Finally, the event hub keeps track of the capabilities of

 * individual input devices, such as their class and the set of key codes that they support.

 */

class EventHubInterface : public virtual RefBase {

protected:

    EventHubInterface() { }

    virtual ~EventHubInterface() { }

public:

    // Synthetic raw event type codes produced when devices are added or removed.

    enum {

        // Sent when a device is added.

        DEVICE_ADDED = 0x10000000,

        // Sent when a device is removed.

        DEVICE_REMOVED = 0x20000000,

        // Sent when all added/removed devices from the most recent scan have been reported.

        // This event is always sent at least once.

        FINISHED_DEVICE_SCAN = 0x30000000,

    };

    virtual uint32_t getDeviceClasses(int32_t deviceId) const = 0;

    virtual String8 getDeviceName(int32_t deviceId) const = 0;

    virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const = 0;

    virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,

            RawAbsoluteAxisInfo* outAxisInfo) const = 0;

    virtual status_t scancodeToKeycode(int32_t deviceId, int scancode,

            int32_t* outKeycode, uint32_t* outFlags) const = 0;

    // exclude a particular device from opening

    // this can be used to ignore input devices for sensors

    virtual void addExcludedDevice(const char* deviceName) = 0;

    /*

     * Wait for the next event to become available and return it.

     * After returning, the EventHub holds onto a wake lock until the next call to getEvent.

     * This ensures that the device will not go to sleep while the event is being processed.

     * If the device needs to remain awake longer than that, then the caller is responsible

     * for taking care of it (say, by poking the power manager user activity timer).

     */

    virtual bool getEvent(RawEvent* outEvent) = 0;

    /*

     * Query current input state.

     */

    virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const = 0;

    virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const = 0;

    virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const = 0;

    /*

     * Examine key input devices for specific framework keycode support

     */

    virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes,

            uint8_t* outFlags) const = 0;

    virtual bool hasLed(int32_t deviceId, int32_t led) const = 0;

    virtual void setLedState(int32_t deviceId, int32_t led, bool on) = 0;

    virtual void getVirtualKeyDefinitions(int32_t deviceId,

            Vector<VirtualKeyDefinition>& outVirtualKeys) const = 0;

    virtual void dump(String8& dump) = 0;

};

class EventHub : public EventHubInterface

{

public:

    EventHub();

    status_t errorCheck() const;

    virtual uint32_t getDeviceClasses(int32_t deviceId) const;

    virtual String8 getDeviceName(int32_t deviceId) const;

    virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const;

    virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,

            RawAbsoluteAxisInfo* outAxisInfo) const;

    virtual status_t scancodeToKeycode(int32_t deviceId, int scancode,

            int32_t* outKeycode, uint32_t* outFlags) const;

    virtual void addExcludedDevice(const char* deviceName);

    virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const;

    virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const;

    virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const;

    virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes,

            const int32_t* keyCodes, uint8_t* outFlags) const;

    virtual bool getEvent(RawEvent* outEvent);

    virtual bool hasLed(int32_t deviceId, int32_t led) const;

    virtual void setLedState(int32_t deviceId, int32_t led, bool on);

    virtual void getVirtualKeyDefinitions(int32_t deviceId,

            Vector<VirtualKeyDefinition>& outVirtualKeys) const;

    virtual void dump(String8& dump);

protected:

    virtual ~EventHub();

private:

    bool openPlatformInput(void);

    int openDevice(const char *devicePath);

    int closeDevice(const char *devicePath);

    int scanDir(const char *dirname);

    int readNotify(int nfd);

    status_t mError;

    struct Device {

        Device* next;

        int fd;

        const int32_t id;

        const String8 path;

        const InputDeviceIdentifier identifier;

        uint32_t classes;

        uint8_t* keyBitmask;

        String8 configurationFile;

        PropertyMap* configuration;

        VirtualKeyMap* virtualKeyMap;

        KeyMap keyMap;

        Device(int fd, int32_t id, const String8& path, const InputDeviceIdentifier& identifier);

        ~Device();

        void close();

    };

    Device* getDeviceLocked(int32_t deviceId) const;

    bool hasKeycodeLocked(Device* device, int keycode) const;

    int32_t getScanCodeStateLocked(Device* device, int32_t scanCode) const;

    int32_t getKeyCodeStateLocked(Device* device, int32_t keyCode) const;

    int32_t getSwitchStateLocked(Device* device, int32_t sw) const;

    bool markSupportedKeyCodesLocked(Device* device, size_t numCodes,

            const int32_t* keyCodes, uint8_t* outFlags) const;

    void loadConfiguration(Device* device);

    status_t loadVirtualKeyMap(Device* device);

    status_t loadKeyMap(Device* device);

    void setKeyboardProperties(Device* device, bool builtInKeyboard);

    void clearKeyboardProperties(Device* device, bool builtInKeyboard);

    // Protect all internal state.

    mutable Mutex mLock;

    // The actual id of the built-in keyboard, or -1 if none.

    // EventHub remaps the built-in keyboard to id 0 externally as required by the API.

    int32_t mBuiltInKeyboardId;

    int32_t mNextDeviceId;

    // Parallel arrays of fds and devices.

    // First index is reserved for inotify.

    Vector<struct pollfd> mFds;

    Vector<Device*> mDevices;

    Device *mOpeningDevices;

    Device *mClosingDevices;

    bool mOpened;

    bool mNeedToSendFinishedDeviceScan;

    List<String8> mExcludedDevices;

    // device ids that report particular switches.

#ifdef EV_SW

    int32_t mSwitches[SW_MAX + 1];

#endif

    static const int INPUT_BUFFER_SIZE = 64;

    struct input_event mInputBufferData[INPUT_BUFFER_SIZE];

    size_t mInputBufferIndex;

    size_t mInputBufferCount;

    size_t mInputFdIndex;

};

}; // namespace android

#endif // _RUNTIME_EVENT_HUB_H