GHOST_SystemX11.cpp

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * Part of this code has been taken from Qt, under LGPL license
 * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "GHOST_SystemX11.h"
#include "GHOST_WindowX11.h"
#include "GHOST_WindowManager.h"
#include "GHOST_TimerManager.h"
#include "GHOST_EventCursor.h"
#include "GHOST_EventKey.h"
#include "GHOST_EventButton.h"
#include "GHOST_EventWheel.h"
#include "GHOST_DisplayManagerX11.h"
#ifdef WITH_INPUT_NDOF
#include "GHOST_NDOFManagerX11.h"
#endif

#include "GHOST_Debug.h"

#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <X11/XKBlib.h> /* allow detectable autorepeate */

#ifdef WITH_XF86KEYSYM
#include <X11/XF86keysym.h>
#endif

// For timing

#include <sys/time.h>
#include <unistd.h>

#include <iostream>
#include <vector>
#include <stdio.h> // for fprintf only
#include <cstdlib> // for exit

static GHOST_TKey
convertXKey(KeySym key);

//these are for copy and select copy
static char *txt_cut_buffer= NULL;
static char *txt_select_buffer= NULL;

using namespace std;

GHOST_SystemX11::
GHOST_SystemX11(
) : 
    GHOST_System(),
    m_start_time(0)
{
    m_display = XOpenDisplay(NULL);
    
    if (!m_display) {
        std::cerr << "Unable to open a display" << std::endl;
        abort(); //was return before, but this would just mean it will crash later
    }

    /* Open a connection to the X input manager */
#if defined(WITH_X11_XINPUT) && defined(X_HAVE_UTF8_STRING)
    m_xim = XOpenIM(m_display, NULL, (char *)GHOST_X11_RES_NAME, (char *)GHOST_X11_RES_CLASS);
#endif

    m_delete_window_atom 
      = XInternAtom(m_display, "WM_DELETE_WINDOW", True);

    m_wm_protocols= XInternAtom(m_display, "WM_PROTOCOLS", False);
    m_wm_take_focus= XInternAtom(m_display, "WM_TAKE_FOCUS", False);
    m_wm_state= XInternAtom(m_display, "WM_STATE", False);
    m_wm_change_state= XInternAtom(m_display, "WM_CHANGE_STATE", False);
    m_net_state= XInternAtom(m_display, "_NET_WM_STATE", False);
    m_net_max_horz= XInternAtom(m_display,
                    "_NET_WM_STATE_MAXIMIZED_HORZ", False);
    m_net_max_vert= XInternAtom(m_display,
                    "_NET_WM_STATE_MAXIMIZED_VERT", False);
    m_net_fullscreen= XInternAtom(m_display,
                    "_NET_WM_STATE_FULLSCREEN", False);
    m_motif= XInternAtom(m_display, "_MOTIF_WM_HINTS", False);
    m_targets= XInternAtom(m_display, "TARGETS", False);
    m_string= XInternAtom(m_display, "STRING", False);
    m_compound_text= XInternAtom(m_display, "COMPOUND_TEXT", False);
    m_text= XInternAtom(m_display, "TEXT", False);
    m_clipboard= XInternAtom(m_display, "CLIPBOARD", False);
    m_primary= XInternAtom(m_display, "PRIMARY", False);
    m_xclip_out= XInternAtom(m_display, "XCLIP_OUT", False);
    m_incr= XInternAtom(m_display, "INCR", False);
    m_utf8_string= XInternAtom(m_display, "UTF8_STRING", False);
    m_last_warp = 0;


    // compute the initial time
    timeval tv;
    if (gettimeofday(&tv,NULL) == -1) {
        GHOST_ASSERT(false,"Could not instantiate timer!");
    }
    
    // Taking care not to overflow the tv.tv_sec*1000
    m_start_time = GHOST_TUns64(tv.tv_sec)*1000 + tv.tv_usec/1000;
    
    
    /* use detectable autorepeate, mac and windows also do this */
    int use_xkb;
    int xkb_opcode, xkb_event, xkb_error;
    int xkb_major = XkbMajorVersion, xkb_minor = XkbMinorVersion;
    
    use_xkb = XkbQueryExtension(m_display, &xkb_opcode, &xkb_event, &xkb_error, &xkb_major, &xkb_minor);
    if (use_xkb) {
        XkbSetDetectableAutoRepeat(m_display, true, NULL);
    }
    
}

GHOST_SystemX11::
~GHOST_SystemX11()
{
#if defined(WITH_X11_XINPUT) && defined(X_HAVE_UTF8_STRING)
    XCloseIM(m_xim);
#endif

    XCloseDisplay(m_display);
}


    GHOST_TSuccess 
GHOST_SystemX11::
init(
){
    GHOST_TSuccess success = GHOST_System::init();

    if (success) {
#ifdef WITH_INPUT_NDOF
        m_ndofManager = new GHOST_NDOFManagerX11(*this);
#endif
        m_displayManager = new GHOST_DisplayManagerX11(this);

        if (m_displayManager) {
            return GHOST_kSuccess;
        }
    }

    return GHOST_kFailure;
}

    GHOST_TUns64
GHOST_SystemX11::
getMilliSeconds(
) const {
    timeval tv;
    if (gettimeofday(&tv,NULL) == -1) {
        GHOST_ASSERT(false,"Could not compute time!");
    }

    // Taking care not to overflow the tv.tv_sec*1000
    return  GHOST_TUns64(tv.tv_sec)*1000 + tv.tv_usec/1000 - m_start_time;
}
    
    GHOST_TUns8 
GHOST_SystemX11::
getNumDisplays(
) const {
    return GHOST_TUns8(1);
}

    void 
GHOST_SystemX11::
getMainDisplayDimensions(
    GHOST_TUns32& width,
    GHOST_TUns32& height
) const {   
    if (m_display) {
        width  = DisplayWidth(m_display, DefaultScreen(m_display));
        height = DisplayHeight(m_display, DefaultScreen(m_display));
    }
}

    GHOST_IWindow* 
GHOST_SystemX11::
createWindow(
    const STR_String& title,
    GHOST_TInt32 left,
    GHOST_TInt32 top,
    GHOST_TUns32 width,
    GHOST_TUns32 height,
    GHOST_TWindowState state,
    GHOST_TDrawingContextType type,
    bool stereoVisual,
    const GHOST_TUns16 numOfAASamples,
    const GHOST_TEmbedderWindowID parentWindow
){
    GHOST_WindowX11 * window = 0;
    
    if (!m_display) return 0;
    

    

    window = new GHOST_WindowX11 (
        this,m_display,title, left, top, width, height, state, parentWindow, type, stereoVisual
    );

    if (window) {
        // Both are now handle in GHOST_WindowX11.cpp
        // Focus and Delete atoms.

        if (window->getValid()) {
            // Store the pointer to the window 
            m_windowManager->addWindow(window);
            m_windowManager->setActiveWindow(window);
            pushEvent( new GHOST_Event(getMilliSeconds(), GHOST_kEventWindowSize, window) );
        }
        else {
            delete window;
            window = 0;
        }
    }
    return window;
}

    GHOST_WindowX11 * 
GHOST_SystemX11::
findGhostWindow(
    Window xwind
) const {
    
    if (xwind == 0) return NULL;

    // It is not entirely safe to do this as the backptr may point
    // to a window that has recently been removed. 
    // We should always check the window manager's list of windows 
    // and only process events on these windows.

    vector<GHOST_IWindow *> & win_vec = m_windowManager->getWindows();

    vector<GHOST_IWindow *>::iterator win_it = win_vec.begin();
    vector<GHOST_IWindow *>::const_iterator win_end = win_vec.end();
    
    for (; win_it != win_end; ++win_it) {
        GHOST_WindowX11 * window = static_cast<GHOST_WindowX11 *>(*win_it);
        if (window->getXWindow() == xwind) {
            return window;
        }
    }
    return NULL;
    
}

static void SleepTillEvent(Display *display, GHOST_TInt64 maxSleep)
{
    int fd = ConnectionNumber(display);
    fd_set fds;
    
    FD_ZERO(&fds);
    FD_SET(fd, &fds);

    if (maxSleep == -1) {
        select(fd + 1, &fds, NULL, NULL, NULL);
    }
    else {
        timeval tv;

        tv.tv_sec = maxSleep/1000;
        tv.tv_usec = (maxSleep - tv.tv_sec*1000)*1000;
    
        select(fd + 1, &fds, NULL, NULL, &tv);
    }
}

/* This function borrowed from Qt's X11 support
 * qclipboard_x11.cpp
 *  */
struct init_timestamp_data
{
    Time timestamp;
};

static Bool init_timestamp_scanner(Display*, XEvent *event, XPointer arg)
{
    init_timestamp_data *data =
        reinterpret_cast<init_timestamp_data*>(arg);
    switch(event->type)
    {
    case ButtonPress:
    case ButtonRelease:
        data->timestamp = event->xbutton.time;
        break;
    case MotionNotify:
        data->timestamp = event->xmotion.time;
        break;
    case KeyPress:
    case KeyRelease:
        data->timestamp = event->xkey.time;
        break;
    case PropertyNotify:
        data->timestamp = event->xproperty.time;
        break;
    case EnterNotify:
    case LeaveNotify:
        data->timestamp = event->xcrossing.time;
        break;
    case SelectionClear:
        data->timestamp = event->xselectionclear.time;
        break;
    default:
        break;
    }

    return false;
}

Time
GHOST_SystemX11::
lastEventTime(Time default_time) {
    init_timestamp_data data;
    data.timestamp = default_time;
    XEvent ev;
    XCheckIfEvent(m_display, &ev, &init_timestamp_scanner, (XPointer)&data);

    return data.timestamp;
}

    bool 
GHOST_SystemX11::
processEvents(
    bool waitForEvent
){
    // Get all the current events -- translate them into 
    // ghost events and call base class pushEvent() method.
    
    bool anyProcessed = false;
    
    do {
        GHOST_TimerManager* timerMgr = getTimerManager();
        
        if (waitForEvent && m_dirty_windows.empty() && !XPending(m_display)) {
            GHOST_TUns64 next = timerMgr->nextFireTime();
            
            if (next==GHOST_kFireTimeNever) {
                SleepTillEvent(m_display, -1);
            } else {
                GHOST_TInt64 maxSleep = next - getMilliSeconds();

                if(maxSleep >= 0)
                    SleepTillEvent(m_display, next - getMilliSeconds());
            }
        }
        
        if (timerMgr->fireTimers(getMilliSeconds())) {
            anyProcessed = true;
        }
        
        while (XPending(m_display)) {
            XEvent xevent;
            XNextEvent(m_display, &xevent);
            processEvent(&xevent);
            anyProcessed = true;
        }
        
        if (generateWindowExposeEvents()) {
            anyProcessed = true;
        }

#ifdef WITH_INPUT_NDOF
        if (dynamic_cast<GHOST_NDOFManagerX11*>(m_ndofManager)->processEvents()) {
            anyProcessed = true;
        }
#endif
        
    } while (waitForEvent && !anyProcessed);
    
    return anyProcessed;
}

    void
GHOST_SystemX11::processEvent(XEvent *xe)
{
    GHOST_WindowX11 * window = findGhostWindow(xe->xany.window);    
    GHOST_Event * g_event = NULL;

    if (!window) {
        return;
    }
    
    switch (xe->type) {
        case Expose:
        {
            XExposeEvent & xee = xe->xexpose;

            if (xee.count == 0) {
                // Only generate a single expose event
                // per read of the event queue.

                g_event = new
                GHOST_Event(
                    getMilliSeconds(),
                    GHOST_kEventWindowUpdate,
                    window
                );
            }
            break;
        }

        case MotionNotify:
        {
            XMotionEvent &xme = xe->xmotion;
            
            if(window->getCursorGrabMode() != GHOST_kGrabDisable && window->getCursorGrabMode() != GHOST_kGrabNormal)
            {
                GHOST_TInt32 x_new= xme.x_root;
                GHOST_TInt32 y_new= xme.y_root;
                GHOST_TInt32 x_accum, y_accum;
                GHOST_Rect bounds;

                /* fallback to window bounds */
                if(window->getCursorGrabBounds(bounds)==GHOST_kFailure)
                    window->getClientBounds(bounds);

                /* could also clamp to screen bounds
                 * wrap with a window outside the view will fail atm  */
                bounds.wrapPoint(x_new, y_new, 8); /* offset of one incase blender is at screen bounds */
                window->getCursorGrabAccum(x_accum, y_accum);

                if(x_new != xme.x_root || y_new != xme.y_root) {
                    if (xme.time > m_last_warp) {
                        /* when wrapping we don't need to add an event because the
                         * setCursorPosition call will cause a new event after */
                        setCursorPosition(x_new, y_new); /* wrap */
                        window->setCursorGrabAccum(x_accum + (xme.x_root - x_new), y_accum + (xme.y_root - y_new));
                        m_last_warp = lastEventTime(xme.time);
                    } else {
                        setCursorPosition(x_new, y_new); /* wrap but don't accumulate */
                    }
                }
                else {
                    g_event = new
                    GHOST_EventCursor(
                        getMilliSeconds(),
                        GHOST_kEventCursorMove,
                        window,
                        xme.x_root + x_accum,
                        xme.y_root + y_accum
                    );
                }
            }
            else {
                g_event = new
                GHOST_EventCursor(
                    getMilliSeconds(),
                    GHOST_kEventCursorMove,
                    window,
                    xme.x_root,
                    xme.y_root
                );
            }
            break;
        }

        case KeyPress:
        case KeyRelease:
        {
            XKeyEvent *xke = &(xe->xkey);
            KeySym key_sym = XLookupKeysym(xke,0);
            char ascii;
            char utf8_buf[6]; /* 6 is enough for a utf8 char */
            
            GHOST_TKey gkey = convertXKey(key_sym);
            GHOST_TEventType type = (xke->type == KeyPress) ? 
                GHOST_kEventKeyDown : GHOST_kEventKeyUp;
            
            if (!XLookupString(xke, &ascii, 1, NULL, NULL)) {
                ascii = '\0';
            }
            
#if defined(WITH_X11_XINPUT) && defined(X_HAVE_UTF8_STRING)
            /* getting unicode on key-up events gives XLookupNone status */
            if (xke->type == KeyPress) {
                Status status;
                int len;

                /* use utf8 because its not locale depentant, from xorg docs */
                if (!(len= Xutf8LookupString(window->getX11_XIC(), xke, utf8_buf, sizeof(utf8_buf), &key_sym, &status))) {
                    utf8_buf[0]= '\0';
                }

                if ((status == XLookupChars || status == XLookupBoth)) {
                    if ((unsigned char)utf8_buf[0] >= 32) { /* not an ascii control character */
                        /* do nothing for now, this is valid utf8 */
                    }
                    else {
                        utf8_buf[0]= '\0';
                    }
                }
                else if (status == XLookupKeySym) {
                    /* this key doesn't have a text representation, it is a command
                       key of some sort */;
                }
                else {
                    printf("Bad keycode lookup. Keysym 0x%x Status: %s\n",
                              (unsigned int) key_sym,
                              (status == XBufferOverflow ? "BufferOverflow" :
                               status == XLookupNone ? "XLookupNone" :
                               status == XLookupKeySym ? "XLookupKeySym" :
                               "Unknown status"));

                    printf("'%.*s' %p %p\n", len, utf8_buf, window->getX11_XIC(), m_xim);
                }
            }
            else {
                utf8_buf[0]= '\0';
            }
#else
            utf8_buf[0]= '\0';
#endif

            g_event = new
            GHOST_EventKey(
                getMilliSeconds(),
                type,
                window,
                gkey,
                ascii,
                utf8_buf
            );
            
        break;
        }

        case ButtonPress:
        case ButtonRelease:
        {
            XButtonEvent & xbe = xe->xbutton;
            GHOST_TButtonMask gbmask = GHOST_kButtonMaskLeft;
            GHOST_TEventType type = (xbe.type == ButtonPress) ? 
                GHOST_kEventButtonDown : GHOST_kEventButtonUp;

            /* process wheel mouse events and break, only pass on press events */
            if(xbe.button == Button4) {
                if(xbe.type == ButtonPress)
                    g_event = new GHOST_EventWheel(getMilliSeconds(), window, 1);
                break;
            }
            else if(xbe.button == Button5) {
                if(xbe.type == ButtonPress)
                    g_event = new GHOST_EventWheel(getMilliSeconds(), window, -1);
                break;
            }
            
            /* process rest of normal mouse buttons */
            if(xbe.button == Button1)
                gbmask = GHOST_kButtonMaskLeft;
            else if(xbe.button == Button2)
                gbmask = GHOST_kButtonMaskMiddle;
            else if(xbe.button == Button3)
                gbmask = GHOST_kButtonMaskRight;
            /* It seems events 6 and 7 are for horizontal scrolling.
            * you can re-order button mapping like this... (swaps 6,7 with 8,9)
            *   xmodmap -e "pointer = 1 2 3 4 5 8 9 6 7" 
            */
            else if(xbe.button == 8)
                gbmask = GHOST_kButtonMaskButton4;
            else if(xbe.button == 9)
                gbmask = GHOST_kButtonMaskButton5;
            else
                break;

            g_event = new
            GHOST_EventButton(
                getMilliSeconds(),
                type,
                window,
                gbmask
            );
            break;
        }
            
            // change of size, border, layer etc.
        case ConfigureNotify:
        {
            /* XConfigureEvent & xce = xe->xconfigure; */

            g_event = new 
            GHOST_Event(
                getMilliSeconds(),
                GHOST_kEventWindowSize,
                window
            );          
            break;
        }

        case FocusIn:
        case FocusOut:
        {
            XFocusChangeEvent &xfe = xe->xfocus;

            // TODO: make sure this is the correct place for activate/deactivate
            // printf("X: focus %s for window %d\n", xfe.type == FocusIn ? "in" : "out", (int) xfe.window);
        
            // May have to look at the type of event and filter some
            // out.
                                    
            GHOST_TEventType gtype = (xfe.type == FocusIn) ? 
                GHOST_kEventWindowActivate : GHOST_kEventWindowDeactivate;

            g_event = new 
            GHOST_Event(    
                getMilliSeconds(),
                gtype,
                window
            );
            break;

        }
        case ClientMessage:
        {
            XClientMessageEvent & xcme = xe->xclient;

            if (((Atom)xcme.data.l[0]) == m_delete_window_atom) {
                g_event = new 
                GHOST_Event(    
                    getMilliSeconds(),
                    GHOST_kEventWindowClose,
                    window
                );
            }
            else if (((Atom)xcme.data.l[0]) == m_wm_take_focus) {
                XWindowAttributes attr;
                Window fwin;
                int revert_to;

                /* as ICCCM say, we need reply this event
                 * with a SetInputFocus, the data[1] have
                 * the valid timestamp (send by the wm).
                 *
                 * Some WM send this event before the
                 * window is really mapped (for example
                 * change from virtual desktop), so we need
                 * to be sure that our windows is mapped
                 * or this call fail and close blender.
                 */
                if (XGetWindowAttributes(m_display, xcme.window, &attr) == True) {
                    if (XGetInputFocus(m_display, &fwin, &revert_to) == True) {
                        if (attr.map_state == IsViewable) {
                            if (fwin != xcme.window)
                                XSetInputFocus(m_display, xcme.window, RevertToParent, xcme.data.l[1]);
                        }
                    }
                }
            } else {
                /* Unknown client message, ignore */
            }
            break;
        }
        
        case DestroyNotify:
			::exit(-1);  
        // We're not interested in the following things.(yet...)
        case NoExpose : 
        case GraphicsExpose :
            break;
        
        case EnterNotify:
        case LeaveNotify:
        {
            /* XCrossingEvents pointer leave enter window.
               also do cursor move here, MotionNotify only
               happens when motion starts & ends inside window.
               we only do moves when the crossing mode is 'normal'
               (really crossing between windows) since some windowmanagers
               also send grab/ungrab crossings for mousewheel events.
            */
            XCrossingEvent &xce = xe->xcrossing;
            if( xce.mode == NotifyNormal ) {
                g_event = new 
                GHOST_EventCursor(
                    getMilliSeconds(),
                    GHOST_kEventCursorMove,
                    window,
                    xce.x_root,
                    xce.y_root
                );
            }

            // printf("X: %s window %d\n", xce.type == EnterNotify ? "entering" : "leaving", (int) xce.window);

            if (xce.type == EnterNotify)
                m_windowManager->setActiveWindow(window);
            else
                m_windowManager->setWindowInactive(window);

            break;
        }
        case MapNotify:
            /*
             * From ICCCM:
             * [ Clients can select for StructureNotify on their
             *   top-level windows to track transition between
             *   Normal and Iconic states. Receipt of a MapNotify
             *   event will indicate a transition to the Normal
             *   state, and receipt of an UnmapNotify event will
             *   indicate a transition to the Iconic state. ]
             */
            if (window->m_post_init == True) {
                /*
                 * Now we are sure that the window is
                 * mapped, so only need change the state.
                 */
                window->setState (window->m_post_state);
                window->m_post_init = False;
            }
            break;
        case UnmapNotify:
            break;
        case MappingNotify:
        case ReparentNotify:
            break;
        case SelectionRequest:
        {
            XEvent nxe;
            Atom target, utf8_string, string, compound_text, c_string;
            XSelectionRequestEvent *xse = &xe->xselectionrequest;
            
            target = XInternAtom(m_display, "TARGETS", False);
            utf8_string = XInternAtom(m_display, "UTF8_STRING", False);
            string = XInternAtom(m_display, "STRING", False);
            compound_text = XInternAtom(m_display, "COMPOUND_TEXT", False);
            c_string = XInternAtom(m_display, "C_STRING", False);
            
            /* support obsolete clients */
            if (xse->property == None) {
                xse->property = xse->target;
            }
            
            nxe.xselection.type = SelectionNotify;
            nxe.xselection.requestor = xse->requestor;
            nxe.xselection.property = xse->property;
            nxe.xselection.display = xse->display;
            nxe.xselection.selection = xse->selection;
            nxe.xselection.target = xse->target;
            nxe.xselection.time = xse->time;
            
            /*Check to see if the requestor is asking for String*/
            if(xse->target == utf8_string || xse->target == string || xse->target == compound_text || xse->target == c_string) {
                if (xse->selection == XInternAtom(m_display, "PRIMARY", False)) {
                    XChangeProperty(m_display, xse->requestor, xse->property, xse->target, 8, PropModeReplace,
                                    (unsigned char*)txt_select_buffer, strlen(txt_select_buffer));
                } else if (xse->selection == XInternAtom(m_display, "CLIPBOARD", False)) {
                    XChangeProperty(m_display, xse->requestor, xse->property, xse->target, 8, PropModeReplace,
                                    (unsigned char*)txt_cut_buffer, strlen(txt_cut_buffer));
                }
            } else if (xse->target == target) {
                Atom alist[5];
                alist[0] = target;
                alist[1] = utf8_string;
                alist[2] = string;
                alist[3] = compound_text;
                alist[4] = c_string;
                XChangeProperty(m_display, xse->requestor, xse->property, xse->target, 32, PropModeReplace,
                                (unsigned char*)alist, 5);
                XFlush(m_display);
            } else  {
                //Change property to None because we do not support anything but STRING
                nxe.xselection.property = None;
            }
            
            //Send the event to the client 0 0 == False, SelectionNotify
            XSendEvent(m_display, xse->requestor, 0, 0, &nxe);
            XFlush(m_display);
            break;
        }
        
        default: {
#ifdef WITH_X11_XINPUT
            if(xe->type == window->GetXTablet().MotionEvent) 
            {
                XDeviceMotionEvent* data = (XDeviceMotionEvent*)xe;
                window->GetXTablet().CommonData.Pressure= 
                    data->axis_data[2]/((float)window->GetXTablet().PressureLevels);
            
            /* the (short) cast and the &0xffff is bizarre and unexplained anywhere,
             * but I got garbage data without it. Found it in the xidump.c source --matt */
                window->GetXTablet().CommonData.Xtilt= 
                    (short)(data->axis_data[3]&0xffff)/((float)window->GetXTablet().XtiltLevels);
                window->GetXTablet().CommonData.Ytilt= 
                    (short)(data->axis_data[4]&0xffff)/((float)window->GetXTablet().YtiltLevels);
            }
            else if(xe->type == window->GetXTablet().ProxInEvent) 
            {
                XProximityNotifyEvent* data = (XProximityNotifyEvent*)xe;
                if(data->deviceid == window->GetXTablet().StylusID)
                    window->GetXTablet().CommonData.Active= GHOST_kTabletModeStylus;
                else if(data->deviceid == window->GetXTablet().EraserID)
                    window->GetXTablet().CommonData.Active= GHOST_kTabletModeEraser;
            }
            else if(xe->type == window->GetXTablet().ProxOutEvent)
                window->GetXTablet().CommonData.Active= GHOST_kTabletModeNone;
#endif // WITH_X11_XINPUT
            break;
        }
    }

    if (g_event) {
        pushEvent(g_event);
    }
}

    GHOST_TSuccess 
GHOST_SystemX11::
getModifierKeys(
    GHOST_ModifierKeys& keys
) const {

    // analyse the masks retuned from XQueryPointer.

    memset((void *)m_keyboard_vector,0,sizeof(m_keyboard_vector));

    XQueryKeymap(m_display,(char *)m_keyboard_vector);

    // now translate key symobols into keycodes and
    // test with vector.

    const static KeyCode shift_l = XKeysymToKeycode(m_display,XK_Shift_L);
    const static KeyCode shift_r = XKeysymToKeycode(m_display,XK_Shift_R);
    const static KeyCode control_l = XKeysymToKeycode(m_display,XK_Control_L);
    const static KeyCode control_r = XKeysymToKeycode(m_display,XK_Control_R);
    const static KeyCode alt_l = XKeysymToKeycode(m_display,XK_Alt_L);
    const static KeyCode alt_r = XKeysymToKeycode(m_display,XK_Alt_R);
    const static KeyCode super_l = XKeysymToKeycode(m_display,XK_Super_L);
    const static KeyCode super_r = XKeysymToKeycode(m_display,XK_Super_R);

    // shift
    keys.set(GHOST_kModifierKeyLeftShift, ((m_keyboard_vector[shift_l >> 3] >> (shift_l & 7)) & 1) != 0);
    keys.set(GHOST_kModifierKeyRightShift, ((m_keyboard_vector[shift_r >> 3] >> (shift_r & 7)) & 1) != 0);
    // control
    keys.set(GHOST_kModifierKeyLeftControl, ((m_keyboard_vector[control_l >> 3] >> (control_l & 7)) & 1) != 0);
    keys.set(GHOST_kModifierKeyRightControl, ((m_keyboard_vector[control_r >> 3] >> (control_r & 7)) & 1) != 0);
    // alt
    keys.set(GHOST_kModifierKeyLeftAlt, ((m_keyboard_vector[alt_l >> 3] >> (alt_l & 7)) & 1) != 0);
    keys.set(GHOST_kModifierKeyRightAlt, ((m_keyboard_vector[alt_r >> 3] >> (alt_r & 7)) & 1) != 0);
    // super (windows) - only one GHOST-kModifierKeyOS, so mapping to either
    keys.set(GHOST_kModifierKeyOS, ( ((m_keyboard_vector[super_l >> 3] >> (super_l & 7)) & 1) ||
                                     ((m_keyboard_vector[super_r >> 3] >> (super_r & 7)) & 1) ) != 0);

    return GHOST_kSuccess;
}

    GHOST_TSuccess 
GHOST_SystemX11::
getButtons(
    GHOST_Buttons& buttons
) const {

    Window root_return, child_return;
    int rx,ry,wx,wy;
    unsigned int mask_return;

    if (XQueryPointer(m_display,
                      RootWindow(m_display,DefaultScreen(m_display)),
                      &root_return,
                      &child_return,
                      &rx,&ry,
                      &wx,&wy,
                      &mask_return) == True)
    {
        buttons.set(GHOST_kButtonMaskLeft,   (mask_return & Button1Mask) != 0);
        buttons.set(GHOST_kButtonMaskMiddle, (mask_return & Button2Mask) != 0);
        buttons.set(GHOST_kButtonMaskRight,  (mask_return & Button3Mask) != 0);
    }
    else {
        return GHOST_kFailure;
    }   

    return GHOST_kSuccess;
}


    GHOST_TSuccess 
GHOST_SystemX11::
getCursorPosition(
    GHOST_TInt32& x,
    GHOST_TInt32& y
) const {

    Window root_return, child_return;
    int rx,ry,wx,wy;
    unsigned int mask_return;

    if (XQueryPointer(
        m_display,
        RootWindow(m_display,DefaultScreen(m_display)),
        &root_return,
        &child_return,
        &rx,&ry,
        &wx,&wy,
        &mask_return
    ) == False) {
        return GHOST_kFailure;
    } else {
        x = rx;
        y = ry;
    }   
    return GHOST_kSuccess;
}


    GHOST_TSuccess 
GHOST_SystemX11::
setCursorPosition(
    GHOST_TInt32 x,
    GHOST_TInt32 y
) {

    // This is a brute force move in screen coordinates
    // XWarpPointer does relative moves so first determine the
    // current pointer position.

    int cx,cy;
    if (getCursorPosition(cx,cy) == GHOST_kFailure) {
        return GHOST_kFailure;
    }

    int relx = x-cx;
    int rely = y-cy;

    XWarpPointer(m_display,None,None,0,0,0,0,relx,rely);
    XSync(m_display, 0); /* Sync to process all requests */
    
    return GHOST_kSuccess;
}


    void
GHOST_SystemX11::
addDirtyWindow(
    GHOST_WindowX11 * bad_wind
){

    GHOST_ASSERT((bad_wind != NULL), "addDirtyWindow() NULL ptr trapped (window)");
    
    m_dirty_windows.push_back(bad_wind);
}


    bool
GHOST_SystemX11::
generateWindowExposeEvents(
){

    vector<GHOST_WindowX11 *>::iterator w_start = m_dirty_windows.begin();
    vector<GHOST_WindowX11 *>::const_iterator w_end = m_dirty_windows.end();
    bool anyProcessed = false;
    
    for (;w_start != w_end; ++w_start) {
        GHOST_Event * g_event = new 
            GHOST_Event(
                getMilliSeconds(),
                GHOST_kEventWindowUpdate,
                *w_start
            );          

        (*w_start)->validate(); 
        
        if (g_event) {
            pushEvent(g_event);
            anyProcessed = true;
        }
    }

    m_dirty_windows.clear();
    return anyProcessed;
}

#define GXMAP(k,x,y) case x: k = y; break; 

static GHOST_TKey
convertXKey(KeySym key)
{
    GHOST_TKey type;

    if ((key >= XK_A) && (key <= XK_Z)) {
        type = GHOST_TKey( key - XK_A + int(GHOST_kKeyA));
    } else if ((key >= XK_a) && (key <= XK_z)) {
        type = GHOST_TKey(key - XK_a + int(GHOST_kKeyA));
    } else if ((key >= XK_0) && (key <= XK_9)) {
        type = GHOST_TKey(key - XK_0 + int(GHOST_kKey0));
    } else if ((key >= XK_F1) && (key <= XK_F24)) {
        type = GHOST_TKey(key - XK_F1 + int(GHOST_kKeyF1));
#if defined(__sun) || defined(__sun__) 
        /* This is a bit of a hack, but it looks like sun
           Used F11 and friends for its special keys Stop,again etc..
           So this little patch enables F11 and F12 to work as expected
           following link has documentation on it: 
           http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4734408
           also from /usr/include/X11/Sunkeysym.h 
#define SunXK_F36               0x1005FF10      // Labeled F11
#define SunXK_F37               0x1005FF11      // Labeled F12 

                mein@cs.umn.edu
         */
        
    } else if (key == 268828432) {
        type = GHOST_kKeyF11;
    } else if (key == 268828433) {
        type = GHOST_kKeyF12;
#endif
    } else {
        switch(key) {
            GXMAP(type,XK_BackSpace,    GHOST_kKeyBackSpace);
            GXMAP(type,XK_Tab,          GHOST_kKeyTab);
            GXMAP(type,XK_Return,       GHOST_kKeyEnter);
            GXMAP(type,XK_Escape,       GHOST_kKeyEsc);
            GXMAP(type,XK_space,        GHOST_kKeySpace);
            
            GXMAP(type,XK_Linefeed,     GHOST_kKeyLinefeed);
            GXMAP(type,XK_semicolon,    GHOST_kKeySemicolon);
            GXMAP(type,XK_period,       GHOST_kKeyPeriod);
            GXMAP(type,XK_comma,        GHOST_kKeyComma);
            GXMAP(type,XK_quoteright,   GHOST_kKeyQuote);
            GXMAP(type,XK_quoteleft,    GHOST_kKeyAccentGrave);
            GXMAP(type,XK_minus,        GHOST_kKeyMinus);
            GXMAP(type,XK_slash,        GHOST_kKeySlash);
            GXMAP(type,XK_backslash,    GHOST_kKeyBackslash);
            GXMAP(type,XK_equal,        GHOST_kKeyEqual);
            GXMAP(type,XK_bracketleft,  GHOST_kKeyLeftBracket);
            GXMAP(type,XK_bracketright, GHOST_kKeyRightBracket);
            GXMAP(type,XK_Pause,        GHOST_kKeyPause);
            
            GXMAP(type,XK_Shift_L,      GHOST_kKeyLeftShift);
            GXMAP(type,XK_Shift_R,      GHOST_kKeyRightShift);
            GXMAP(type,XK_Control_L,    GHOST_kKeyLeftControl);
            GXMAP(type,XK_Control_R,    GHOST_kKeyRightControl);
            GXMAP(type,XK_Alt_L,        GHOST_kKeyLeftAlt);
            GXMAP(type,XK_Alt_R,        GHOST_kKeyRightAlt);
            GXMAP(type,XK_Super_L,      GHOST_kKeyOS);
            GXMAP(type,XK_Super_R,      GHOST_kKeyOS);

            GXMAP(type,XK_Insert,       GHOST_kKeyInsert);
            GXMAP(type,XK_Delete,       GHOST_kKeyDelete);
            GXMAP(type,XK_Home,         GHOST_kKeyHome);
            GXMAP(type,XK_End,          GHOST_kKeyEnd);
            GXMAP(type,XK_Page_Up,      GHOST_kKeyUpPage);
            GXMAP(type,XK_Page_Down,    GHOST_kKeyDownPage);

            GXMAP(type,XK_Left,         GHOST_kKeyLeftArrow);
            GXMAP(type,XK_Right,        GHOST_kKeyRightArrow);
            GXMAP(type,XK_Up,           GHOST_kKeyUpArrow);
            GXMAP(type,XK_Down,         GHOST_kKeyDownArrow);

            GXMAP(type,XK_Caps_Lock,    GHOST_kKeyCapsLock);
            GXMAP(type,XK_Scroll_Lock,  GHOST_kKeyScrollLock);
            GXMAP(type,XK_Num_Lock,     GHOST_kKeyNumLock);
            
                /* keypad events */
                
            GXMAP(type,XK_KP_0,         GHOST_kKeyNumpad0);
            GXMAP(type,XK_KP_1,         GHOST_kKeyNumpad1);
            GXMAP(type,XK_KP_2,         GHOST_kKeyNumpad2);
            GXMAP(type,XK_KP_3,         GHOST_kKeyNumpad3);
            GXMAP(type,XK_KP_4,         GHOST_kKeyNumpad4);
            GXMAP(type,XK_KP_5,         GHOST_kKeyNumpad5);
            GXMAP(type,XK_KP_6,         GHOST_kKeyNumpad6);
            GXMAP(type,XK_KP_7,         GHOST_kKeyNumpad7);
            GXMAP(type,XK_KP_8,         GHOST_kKeyNumpad8);
            GXMAP(type,XK_KP_9,         GHOST_kKeyNumpad9);
            GXMAP(type,XK_KP_Decimal,   GHOST_kKeyNumpadPeriod);

            GXMAP(type,XK_KP_Insert,    GHOST_kKeyNumpad0);
            GXMAP(type,XK_KP_End,       GHOST_kKeyNumpad1);
            GXMAP(type,XK_KP_Down,      GHOST_kKeyNumpad2);
            GXMAP(type,XK_KP_Page_Down, GHOST_kKeyNumpad3);
            GXMAP(type,XK_KP_Left,      GHOST_kKeyNumpad4);
            GXMAP(type,XK_KP_Begin,     GHOST_kKeyNumpad5);
            GXMAP(type,XK_KP_Right,     GHOST_kKeyNumpad6);
            GXMAP(type,XK_KP_Home,      GHOST_kKeyNumpad7);
            GXMAP(type,XK_KP_Up,        GHOST_kKeyNumpad8);
            GXMAP(type,XK_KP_Page_Up,   GHOST_kKeyNumpad9);
            GXMAP(type,XK_KP_Delete,    GHOST_kKeyNumpadPeriod);

            GXMAP(type,XK_KP_Enter,     GHOST_kKeyNumpadEnter);
            GXMAP(type,XK_KP_Add,       GHOST_kKeyNumpadPlus);
            GXMAP(type,XK_KP_Subtract,  GHOST_kKeyNumpadMinus);
            GXMAP(type,XK_KP_Multiply,  GHOST_kKeyNumpadAsterisk);
            GXMAP(type,XK_KP_Divide,    GHOST_kKeyNumpadSlash);

            /* Media keys in some keyboards and laptops with XFree86/Xorg */
#ifdef WITH_XF86KEYSYM
            GXMAP(type,XF86XK_AudioPlay,    GHOST_kKeyMediaPlay);
            GXMAP(type,XF86XK_AudioStop,    GHOST_kKeyMediaStop);
            GXMAP(type,XF86XK_AudioPrev,    GHOST_kKeyMediaFirst);
            GXMAP(type,XF86XK_AudioRewind,  GHOST_kKeyMediaFirst);
            GXMAP(type,XF86XK_AudioNext,    GHOST_kKeyMediaLast);
#ifdef XF86XK_AudioForward /* Debian lenny's XF86keysym.h has no XF86XK_AudioForward define */
            GXMAP(type,XF86XK_AudioForward, GHOST_kKeyMediaLast);
#endif
#endif

                /* some extra sun cruft (NICE KEYBOARD!) */
#ifdef __sun__
            GXMAP(type,0xffde,          GHOST_kKeyNumpad1);
            GXMAP(type,0xffe0,          GHOST_kKeyNumpad3);
            GXMAP(type,0xffdc,          GHOST_kKeyNumpad5);
            GXMAP(type,0xffd8,          GHOST_kKeyNumpad7);
            GXMAP(type,0xffda,          GHOST_kKeyNumpad9);

            GXMAP(type,0xffd6,          GHOST_kKeyNumpadSlash);
            GXMAP(type,0xffd7,          GHOST_kKeyNumpadAsterisk);
#endif

            default :
                type = GHOST_kKeyUnknown;
                break;
        }
    }

    return type;
}

#undef GXMAP

/* from xclip.c xcout() v0.11 */

#define XCLIB_XCOUT_NONE        0 /* no context */
#define XCLIB_XCOUT_SENTCONVSEL     1 /* sent a request */
#define XCLIB_XCOUT_INCR        2 /* in an incr loop */
#define XCLIB_XCOUT_FALLBACK        3 /* STRING failed, need fallback to UTF8 */
#define XCLIB_XCOUT_FALLBACK_UTF8   4 /* UTF8 failed, move to compouned */
#define XCLIB_XCOUT_FALLBACK_COMP   5 /* compouned failed, move to text. */
#define XCLIB_XCOUT_FALLBACK_TEXT   6

// Retrieves the contents of a selections.
void GHOST_SystemX11::getClipboard_xcout(XEvent evt,
    Atom sel, Atom target, unsigned char **txt,
    unsigned long *len, unsigned int *context) const
{
    Atom pty_type;
    int pty_format;
    unsigned char *buffer;
    unsigned long pty_size, pty_items;
    unsigned char *ltxt= *txt;

    vector<GHOST_IWindow *> & win_vec = m_windowManager->getWindows();
    vector<GHOST_IWindow *>::iterator win_it = win_vec.begin();
    GHOST_WindowX11 * window = static_cast<GHOST_WindowX11 *>(*win_it);
    Window win = window->getXWindow();

    switch (*context) {
        // There is no context, do an XConvertSelection()
        case XCLIB_XCOUT_NONE:
            // Initialise return length to 0
            if (*len > 0) {
                free(*txt);
                *len = 0;
            }

            // Send a selection request
            XConvertSelection(m_display, sel, target, m_xclip_out, win, CurrentTime);
            *context = XCLIB_XCOUT_SENTCONVSEL;
            return;

        case XCLIB_XCOUT_SENTCONVSEL:
            if (evt.type != SelectionNotify)
                return;

            if (target == m_utf8_string && evt.xselection.property == None) {
                *context= XCLIB_XCOUT_FALLBACK_UTF8;
                return;
            }
            else if (target == m_compound_text && evt.xselection.property == None) {
                *context= XCLIB_XCOUT_FALLBACK_COMP;
                return;
            }
            else if (target == m_text && evt.xselection.property == None) {
                *context= XCLIB_XCOUT_FALLBACK_TEXT;
                return;
            }

            // find the size and format of the data in property
            XGetWindowProperty(m_display, win, m_xclip_out, 0, 0, False,
                AnyPropertyType, &pty_type, &pty_format,
                &pty_items, &pty_size, &buffer);
            XFree(buffer);

            if (pty_type == m_incr) {
                // start INCR mechanism by deleting property
                XDeleteProperty(m_display, win, m_xclip_out);
                XFlush(m_display);
                *context = XCLIB_XCOUT_INCR;
                return;
            }

            // if it's not incr, and not format == 8, then there's
            // nothing in the selection (that xclip understands, anyway)

            if (pty_format != 8) {
                *context = XCLIB_XCOUT_NONE;
                return;
            }

            // not using INCR mechanism, just read the property
            XGetWindowProperty(m_display, win, m_xclip_out, 0, (long) pty_size,
                    False, AnyPropertyType, &pty_type,
                    &pty_format, &pty_items, &pty_size, &buffer);

            // finished with property, delete it
            XDeleteProperty(m_display, win, m_xclip_out);

            // copy the buffer to the pointer for returned data
            ltxt = (unsigned char *) malloc(pty_items);
            memcpy(ltxt, buffer, pty_items);

            // set the length of the returned data
            *len = pty_items;
            *txt = ltxt;

            // free the buffer
            XFree(buffer);

            *context = XCLIB_XCOUT_NONE;

            // complete contents of selection fetched, return 1
            return;

        case XCLIB_XCOUT_INCR:
            // To use the INCR method, we basically delete the
            // property with the selection in it, wait for an
            // event indicating that the property has been created,
            // then read it, delete it, etc.

            // make sure that the event is relevant
            if (evt.type != PropertyNotify)
                return;

            // skip unless the property has a new value
            if (evt.xproperty.state != PropertyNewValue)
                return;

            // check size and format of the property
            XGetWindowProperty(m_display, win, m_xclip_out, 0, 0, False,
                AnyPropertyType, &pty_type, &pty_format,
                &pty_items, &pty_size, (unsigned char **) &buffer);

            if (pty_format != 8) {
                // property does not contain text, delete it
                // to tell the other X client that we have read 
                // it and to send the next property
                XFree(buffer);
                XDeleteProperty(m_display, win, m_xclip_out);
                return;
            }

            if (pty_size == 0) {
                // no more data, exit from loop
                XFree(buffer);
                XDeleteProperty(m_display, win, m_xclip_out);
                *context = XCLIB_XCOUT_NONE;

                // this means that an INCR transfer is now
                // complete, return 1
                return;
            }

            XFree(buffer);

            // if we have come this far, the propery contains
            // text, we know the size.
            XGetWindowProperty(m_display, win, m_xclip_out, 0, (long) pty_size,
                False, AnyPropertyType, &pty_type, &pty_format,
                &pty_items, &pty_size, (unsigned char **) &buffer);

            // allocate memory to accommodate data in *txt
            if (*len == 0) {
                *len = pty_items;
                ltxt = (unsigned char *) malloc(*len);
            }
            else {
                *len += pty_items;
                ltxt = (unsigned char *) realloc(ltxt, *len);
            }

            // add data to ltxt
            memcpy(&ltxt[*len - pty_items], buffer, pty_items);

            *txt = ltxt;
            XFree(buffer);

            // delete property to get the next item
            XDeleteProperty(m_display, win, m_xclip_out);
            XFlush(m_display);
            return;
    }
    return;
}

GHOST_TUns8 *GHOST_SystemX11::getClipboard(bool selection) const
{
    Atom sseln;
    Atom target= m_utf8_string;
    Window owner;

    // from xclip.c doOut() v0.11
    unsigned char *sel_buf;
    unsigned long sel_len= 0;
    XEvent evt;
    unsigned int context= XCLIB_XCOUT_NONE;

    if (selection == True)
        sseln= m_primary;
    else
        sseln= m_clipboard;

    vector<GHOST_IWindow *> & win_vec = m_windowManager->getWindows();
    vector<GHOST_IWindow *>::iterator win_it = win_vec.begin();
    GHOST_WindowX11 * window = static_cast<GHOST_WindowX11 *>(*win_it);
    Window win = window->getXWindow();

    /* check if we are the owner. */
    owner= XGetSelectionOwner(m_display, sseln);
    if (owner == win) {
        if (sseln == m_clipboard) {
            sel_buf= (unsigned char *)malloc(strlen(txt_cut_buffer)+1);
            strcpy((char *)sel_buf, txt_cut_buffer);
            return((GHOST_TUns8*)sel_buf);
        }
        else {
            sel_buf= (unsigned char *)malloc(strlen(txt_select_buffer)+1);
            strcpy((char *)sel_buf, txt_select_buffer);
            return((GHOST_TUns8*)sel_buf);
        }
    }
    else if (owner == None)
        return(NULL);

    while (1) {
        /* only get an event if xcout() is doing something */
        if (context != XCLIB_XCOUT_NONE)
            XNextEvent(m_display, &evt);

        /* fetch the selection, or part of it */
        getClipboard_xcout(evt, sseln, target, &sel_buf, &sel_len, &context);

        /* fallback is needed. set XA_STRING to target and restart the loop. */
        if (context == XCLIB_XCOUT_FALLBACK) {
            context= XCLIB_XCOUT_NONE;
            target= m_string;
            continue;
        }
        else if (context == XCLIB_XCOUT_FALLBACK_UTF8) {
            /* utf8 fail, move to compouned text. */
            context= XCLIB_XCOUT_NONE;
            target= m_compound_text;
            continue;
        }
        else if (context == XCLIB_XCOUT_FALLBACK_COMP) {
            /* compouned text faile, move to text. */
            context= XCLIB_XCOUT_NONE;
            target= m_text;
            continue;
        }

        /* only continue if xcout() is doing something */
        if (context == XCLIB_XCOUT_NONE)
            break;
    }

    if (sel_len) {
        /* only print the buffer out, and free it, if it's not
         * empty
         */
        unsigned char *tmp_data = (unsigned char*) malloc(sel_len+1);
        memcpy((char*)tmp_data, (char*)sel_buf, sel_len);
        tmp_data[sel_len] = '\0';
        
        if (sseln == m_string)
            XFree(sel_buf);
        else
            free(sel_buf);
        
        return (GHOST_TUns8*)tmp_data;
    }
    return(NULL);
}

void GHOST_SystemX11::putClipboard(GHOST_TInt8 *buffer, bool selection) const
{
    Window m_window, owner;

    vector<GHOST_IWindow *> & win_vec = m_windowManager->getWindows();  
    vector<GHOST_IWindow *>::iterator win_it = win_vec.begin();
    GHOST_WindowX11 * window = static_cast<GHOST_WindowX11 *>(*win_it);
    m_window = window->getXWindow();

    if (buffer) {
        if (selection == False) {
            XSetSelectionOwner(m_display, m_clipboard, m_window, CurrentTime);
            owner= XGetSelectionOwner(m_display, m_clipboard);
            if (txt_cut_buffer)
                free((void*)txt_cut_buffer);

            txt_cut_buffer = (char*) malloc(strlen(buffer)+1);
            strcpy(txt_cut_buffer, buffer);
        } else {
            XSetSelectionOwner(m_display, m_primary, m_window, CurrentTime);
            owner= XGetSelectionOwner(m_display, m_primary);
            if (txt_select_buffer)
                free((void*)txt_select_buffer);

            txt_select_buffer = (char*) malloc(strlen(buffer)+1);
            strcpy(txt_select_buffer, buffer);
        }

        if (owner != m_window)
            fprintf(stderr, "failed to own primary\n");
    }
}