libGizmod/GizmoLinuxInputDevice.cpp

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/*
  
  Copyright (c) 2007, Tim Burrell
  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. 
  
*/

#include "GizmoLinuxInputDevice.hpp"
#include "GizmoKeyDefs.hpp"
#include "../libH/Debug.hpp"
#include "../libH/Exception.hpp"
#include "../libH/UtilTime.hpp"
#include "../libH/Util.hpp"
#include <boost/python/list.hpp>
#include <boost/python/object.hpp>
#include <boost/python/detail/api_placeholder.hpp>
#include <boost/python/extract.hpp>
#include <boost/bind.hpp>
#include <list>

using namespace std;
using namespace boost;
using namespace boost::python;
using namespace H;
using namespace Gizmod;

// Type Defs

// Construction

GizmoLinuxInputDevice::GizmoLinuxInputDevice(const H::DeviceInfo & DeviceInfo) {
        mDeviceInfo = DeviceInfo;
        mSendNullEvents = false;
        mLastEventTime = 0;
        mMinTimeBetweenEvents = 0;
}

GizmoLinuxInputDevice::GizmoLinuxInputDevice() {
        mSendNullEvents = false;
        mLastEventTime = 0;
        mMinTimeBetweenEvents = 0;
}

GizmoLinuxInputDevice::~GizmoLinuxInputDevice() {
}

// Class Body

void GizmoLinuxInputDevice::buildInputEventsVectorFromBuffer(std::vector<struct input_event> & EventVector, H::DynamicBuffer<char> const & Buffer) {
        DynamicBufferConverter<char, struct input_event>::convert(EventVector, Buffer);
}

bool GizmoLinuxInputDevice::createEventRaw(int Type, int Code, int Value) {
        struct input_event ev[2];
        memset(&ev, 0, sizeof(struct input_event) * 2);
        ev[0].type = Type;
        ev[0].code = Code;
        ev[0].value = Value;
        if (write(mDeviceInfo.FileDescriptor, &ev, sizeof(struct input_event) * 2) == -1)
                return false;
        return true;
}

bool GizmoLinuxInputDevice::createEventPress(int Type, int Code) {
        if (!createEventRaw(Type, Code, 1))
                return false;
        if (!createEventRaw(Type, Code, 0))
                return false;
        return true;
}

bool GizmoLinuxInputDevice::createEventPressMod(int Type, int Code, boost::python::object Modifiers) {
        for (int lp = 0; lp < len(Modifiers); lp ++) 
                if (!createEventRaw(Type, extract<int>(Modifiers[lp]), 1))
                        return false;
        
        if (!createEventRaw(Type, Code, 1))
                return false;
        if (!createEventRaw(Type, Code, 0))
                return false;
        
        for (int lp = 0; lp < len(Modifiers); lp ++) 
                if (!createEventRaw(Type, extract<int>(Modifiers[lp]), 0))
                        return false;
        
        return true;
}

bool GizmoLinuxInputDevice::createEvents(int Type, int Code, int Value, int NumWrites) {
        struct input_event ev;
        memset(&ev, 0, sizeof(struct input_event));
        ev.type = Type;
        ev.code = Code;
        ev.value = Value;
        for (int lp = 0; lp < NumWrites; lp ++) 
                if (write(mDeviceInfo.FileDescriptor, &ev, sizeof(struct input_event)) == -1)
                        return false;
        memset(&ev, 0, sizeof(struct input_event));
        if (write(mDeviceInfo.FileDescriptor, &ev, sizeof(struct input_event)) == -1)
                return false;
        return true;
}

bool GizmoLinuxInputDevice::getSendNullEvents() const {
        return mSendNullEvents;
}

bool GizmoLinuxInputDevice::grabExclusiveAccess(bool Grab) {
        if (ioctl(mDeviceInfo.FileDescriptor, EVIOCGRAB, Grab ? 1 : 0)) {
                cerr << "Device [" << mDeviceInfo.DeviceName <<"] Exclusive Access Grab Failed!" << endl;
                return false;
        }

        cdbg << "Device [" << mDeviceInfo.DeviceName <<"] Exclusive Access Granted" << endl;
        return true;
}

bool GizmoLinuxInputDevice::processEvent() {
        if (UtilTime::getTicks() - mLastEventTime < mMinTimeBetweenEvents)
                return false;
        mLastEventTime = UtilTime::getTicks();
        return true;
}

bool GizmoLinuxInputDevice::remapKey(int CurCode, int NewCode) {
        int codes[2];
        codes[0] = CurCode;
        codes[1] = NewCode;
        if (ioctl(mDeviceInfo.FileDescriptor, EVIOCSKEYCODE, codes)) {
                cerr << "Device [" << mDeviceInfo.DeviceName <<"] Failed to Remap Key [" << CurCode << "]" << " to [" << NewCode << "]" << endl;
                return false;
        }

        cdbg << "Device [" << mDeviceInfo.DeviceName <<"] Key [" << CurCode << "]" << " Remapped to [" << NewCode << "]" << endl;
        return true;
}

void GizmoLinuxInputDevice::setMinimumTimeBetweenEvents(float Seconds) {
        mMinTimeBetweenEvents = (long) (Seconds * 1000000.0f);
}

void GizmoLinuxInputDevice::setSendNullEvents(bool SendNull) {
        mSendNullEvents = SendNull;
}

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