IKeyState.cpp

/*
 * synergy -- mouse and keyboard sharing utility
 * Copyright (C) 2012 Bolton Software Ltd.
 * Copyright (C) 2004 Chris Schoeneman
 * 
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file COPYING that should have accompanied this file.
 * 
 * This package is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "IKeyState.h"
#include "CEventQueue.h"
#include <cstring>
#include <cstdlib>

//
// IKeyState
//

CEvent::Type        IKeyState::s_keyDownEvent   = CEvent::kUnknown;
CEvent::Type        IKeyState::s_keyUpEvent     = CEvent::kUnknown;
CEvent::Type        IKeyState::s_keyRepeatEvent = CEvent::kUnknown;

IKeyState::IKeyState() :
    m_eventQueue(*EVENTQUEUE)
{
}

IKeyState::IKeyState(IEventQueue& eventQueue) :
    m_eventQueue(eventQueue)
{
}

CEvent::Type
IKeyState::getKeyDownEvent(IEventQueue& eventQueue)
{
    return eventQueue.registerTypeOnce(s_keyDownEvent,
                            "IKeyState::keyDown");
}

CEvent::Type
IKeyState::getKeyUpEvent(IEventQueue& eventQueue)
{
    return eventQueue.registerTypeOnce(s_keyUpEvent,
                            "IKeyState::keyUp");
}

CEvent::Type
IKeyState::getKeyRepeatEvent(IEventQueue& eventQueue)
{
    return eventQueue.registerTypeOnce(s_keyRepeatEvent,
                            "IKeyState::keyRepeat");
}

//
// IKeyState::CKeyInfo
//

IKeyState::CKeyInfo*
IKeyState::CKeyInfo::alloc(KeyID id,
                KeyModifierMask mask, KeyButton button, SInt32 count)
{
    CKeyInfo* info           = (CKeyInfo*)malloc(sizeof(CKeyInfo));
    info->m_key              = id;
    info->m_mask             = mask;
    info->m_button           = button;
    info->m_count            = count;
    info->m_screens          = NULL;
    info->m_screensBuffer[0] = '\0';
    return info;
}

IKeyState::CKeyInfo*
IKeyState::CKeyInfo::alloc(KeyID id,
                KeyModifierMask mask, KeyButton button, SInt32 count,
                const std::set<CString>& destinations)
{
    CString screens = join(destinations);

    // build structure
    CKeyInfo* info  = (CKeyInfo*)malloc(sizeof(CKeyInfo) + screens.size());
    info->m_key     = id;
    info->m_mask    = mask;
    info->m_button  = button;
    info->m_count   = count;
    info->m_screens = info->m_screensBuffer;
    strcpy(info->m_screensBuffer, screens.c_str());
    return info;
}

IKeyState::CKeyInfo*
IKeyState::CKeyInfo::alloc(const CKeyInfo& x)
{
    CKeyInfo* info  = (CKeyInfo*)malloc(sizeof(CKeyInfo) +
                                        strlen(x.m_screensBuffer));
    info->m_key     = x.m_key;
    info->m_mask    = x.m_mask;
    info->m_button  = x.m_button;
    info->m_count   = x.m_count;
    info->m_screens = x.m_screens ? info->m_screensBuffer : NULL;
    strcpy(info->m_screensBuffer, x.m_screensBuffer);
    return info;
}

bool
IKeyState::CKeyInfo::isDefault(const char* screens)
{
    return (screens == NULL || screens[0] == '\0');
}

bool
IKeyState::CKeyInfo::contains(const char* screens, const CString& name)
{
    // special cases
    if (isDefault(screens)) {
        return false;
    }
    if (screens[0] == '*') {
        return true;
    }

    // search
    CString match;
    match.reserve(name.size() + 2);
    match += ":";
    match += name;
    match += ":";
    return (strstr(screens, match.c_str()) != NULL);
}

bool
IKeyState::CKeyInfo::equal(const CKeyInfo* a, const CKeyInfo* b)
{
    return (a->m_key    == b->m_key &&
            a->m_mask   == b->m_mask &&
            a->m_button == b->m_button &&
            a->m_count  == b->m_count &&
            strcmp(a->m_screensBuffer, b->m_screensBuffer) == 0);
}

CString
IKeyState::CKeyInfo::join(const std::set<CString>& destinations)
{
    // collect destinations into a string.  names are surrounded by ':'
    // which makes searching easy.  the string is empty if there are no
    // destinations and "*" means all destinations.
    CString screens;
    for (std::set<CString>::const_iterator i = destinations.begin();
                                i != destinations.end(); ++i) {
        if (*i == "*") {
            screens = "*";
            break;
        }
        else {
            if (screens.empty()) {
                screens = ":";
            }
            screens += *i;
            screens += ":";
        }
    }
    return screens;
}

void
IKeyState::CKeyInfo::split(const char* screens, std::set<CString>& dst)
{
    dst.clear();
    if (isDefault(screens)) {
        return;
    }
    if (screens[0] == '*') {
        dst.insert("*");
        return;
    }

    const char* i = screens + 1;
    while (*i != '\0') {
        const char* j = strchr(i, ':');
        dst.insert(CString(i, j - i));
        i = j + 1;
    }
}