/*

Copyright 1993 by Davor Matic

Permission to use, copy, modify, distribute, and sell this software
and its documentation for any purpose is hereby granted without fee,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation.  Davor Matic makes no representations about
the suitability of this software for any purpose.  It is provided "as
is" without express or implied warranty.

*/

#ifdef HAVE_XNEST_CONFIG_H
#include <xnest-config.h>
#endif

#include <X11/X.h>
#include <X11/Xdefs.h>
#include <X11/Xproto.h>

#include "screenint.h"
#include "input.h"
#include "misc.h"
#include "scrnintstr.h"
#include "windowstr.h"
#include "servermd.h"
#include "inputstr.h"
#include "inpututils.h"

#include "mi.h"

#include "Xnest.h"

#include "Args.h"
#include "Color.h"
#include "Display.h"
#include "Screen.h"
#include "XNWindow.h"
#include "Events.h"
#include "Keyboard.h"
#include "Pointer.h"
#include "mipointer.h"

CARD32 lastEventTime = 0;

void
ProcessInputEvents(void)
{
    mieqProcessInputEvents();
}

int
TimeSinceLastInputEvent(void)
{
    if (lastEventTime == 0)
        lastEventTime = GetTimeInMillis();
    return GetTimeInMillis() - lastEventTime;
}

void
SetTimeSinceLastInputEvent(void)
{
    lastEventTime = GetTimeInMillis();
}

static Bool
xnestExposurePredicate(Display * dpy, XEvent * event, char *args)
{
    return event->type == Expose || event->type == ProcessedExpose;
}

static Bool
xnestNotExposurePredicate(Display * dpy, XEvent * event, char *args)
{
    return !xnestExposurePredicate(dpy, event, args);
}

void
xnestCollectExposures(void)
{
    XEvent X;
    WindowPtr pWin;
    RegionRec Rgn;
    BoxRec Box;

    while (XCheckIfEvent(xnestDisplay, &X, xnestExposurePredicate, NULL)) {
        pWin = xnestWindowPtr(X.xexpose.window);

        if (pWin && X.xexpose.width && X.xexpose.height) {
            Box.x1 = pWin->drawable.x + wBorderWidth(pWin) + X.xexpose.x;
            Box.y1 = pWin->drawable.y + wBorderWidth(pWin) + X.xexpose.y;
            Box.x2 = Box.x1 + X.xexpose.width;
            Box.y2 = Box.y1 + X.xexpose.height;

            RegionInit(&Rgn, &Box, 1);

            miSendExposures(pWin, &Rgn, Box.x1, Box.y1);
        }
    }
}

void
xnestQueueKeyEvent(int type, unsigned int keycode)
{
    lastEventTime = GetTimeInMillis();
    QueueKeyboardEvents(xnestKeyboardDevice, type, keycode);
}

static void
xnest_handle_event(XEvent X)
{
    switch (X.type) {
        case KeyPress:
        {
            xnestUpdateModifierState(X.xkey.state);
            xnestQueueKeyEvent(KeyPress, X.xkey.keycode);
            break;
        }

        case KeyRelease:
        {
            xnestUpdateModifierState(X.xkey.state);
            xnestQueueKeyEvent(KeyRelease, X.xkey.keycode);
            break;
        }

        case ButtonPress:
        {
            ValuatorMask mask;
            valuator_mask_set_range(&mask, 0, 0, NULL);
            xnestUpdateModifierState(X.xkey.state);
            lastEventTime = GetTimeInMillis();
            QueuePointerEvents(xnestPointerDevice, ButtonPress,
                               X.xbutton.button, POINTER_RELATIVE, &mask);
            break;
        }

        case ButtonRelease:
        {
            ValuatorMask mask;
            valuator_mask_set_range(&mask, 0, 0, NULL);
            xnestUpdateModifierState(X.xkey.state);
            lastEventTime = GetTimeInMillis();
            QueuePointerEvents(xnestPointerDevice, ButtonRelease,
                               X.xbutton.button, POINTER_RELATIVE, &mask);
            break;
        }

        case MotionNotify:
        {
            ValuatorMask mask;
            int valuators[2];
            valuators[0] = X.xmotion.x;
            valuators[1] = X.xmotion.y;
            valuator_mask_set_range(&mask, 0, 2, valuators);
            lastEventTime = GetTimeInMillis();
            QueuePointerEvents(xnestPointerDevice, MotionNotify,
                               0, POINTER_ABSOLUTE, &mask);
            break;
        }

        case FocusIn:
        {
            if (X.xfocus.detail != NotifyInferior) {
                ScreenPtr pScreen = xnestScreen(X.xfocus.window);
                if (pScreen)
                    xnestDirectInstallColormaps(pScreen);
            }
            break;
        }

        case FocusOut:
        {
            if (X.xfocus.detail != NotifyInferior) {
                ScreenPtr pScreen = xnestScreen(X.xfocus.window);
                if (pScreen)
                    xnestDirectUninstallColormaps(pScreen);
            }
            break;
        }

        case KeymapNotify:
            break;

        case EnterNotify:
        {
            if (X.xcrossing.detail != NotifyInferior) {
                ScreenPtr pScreen = xnestScreen(X.xcrossing.window);
                if (pScreen) {
                    ValuatorMask mask;
                    int valuators[2];
                    NewCurrentScreen(inputInfo.pointer, pScreen, X.xcrossing.x,
                                     X.xcrossing.y);
                    valuators[0] = X.xcrossing.x;
                    valuators[1] = X.xcrossing.y;
                    valuator_mask_set_range(&mask, 0, 2, valuators);
                    lastEventTime = GetTimeInMillis();
                    QueuePointerEvents(xnestPointerDevice, MotionNotify,
                                       0, POINTER_ABSOLUTE, &mask);
                    xnestDirectInstallColormaps(pScreen);
                }
            }
            break;
        }

        case LeaveNotify:
        {
            if (X.xcrossing.detail != NotifyInferior) {
                ScreenPtr pScreen = xnestScreen(X.xcrossing.window);
                if (pScreen) {
                    xnestDirectUninstallColormaps(pScreen);
                }
            }
            break;
        }

        case DestroyNotify:
        {
            if (xnestParentWindow != (Window) 0 &&
                X.xdestroywindow.window == xnestParentWindow)
                exit(0);
            break;
        }

        case CirculateNotify:
        case ConfigureNotify:
        case GravityNotify:
        case MapNotify:
        case ReparentNotify:
        case UnmapNotify:
        case NoExpose:
            break;

        default:
            ErrorF("xnest warning: unhandled event: %d\n", X.type);
            break;
    }
}

void
xnestCollectEvents(void)
{
    XEvent X;

    while (XCheckIfEvent(xnestDisplay, &X, xnestNotExposurePredicate, NULL)) {
        xnest_handle_event(X);
    }
}