/*
 *  DMOUSE-HANDLER.C		compile 32 bit integers (+L)
 *				AZTEC COMPILATION
 *  18 May 1988
 */

#include "dmouse.h"

#define IBASE IntuitionBase

DMS	*Dms;
struct IntuitionBase *IntuitionBase;
struct GfxBase	     *GfxBase;
long		     *LayersBase;

NS	Ns = {	0, 0, 64, -1, 1, -1, -1, 0, CUSTOMSCREEN|SCREENQUIET };

IE *handler();

_main()
{
    register DMS *dms;
    IOR  *ior;
    INT addhand;

    {
	register PROC *proc = (PROC *)FindTask(NULL);
	proc->pr_ConsoleTask = NULL;
    }
    dms = Dms = FindPort(PORTNAME);
    if (!dms)
	_exit(0);
    dms->Port.mp_Flags = PA_SIGNAL;
    dms->Port.mp_SigBit = AllocSignal(-1);
    dms->Port.mp_SigTask = FindTask(NULL);
    dms->HandTask = dms->Port.mp_SigTask;
    ior = CreateStdIO(&dms->Port);
    IntuitionBase = OpenLibrary("intuition.library", 0);
    GfxBase = OpenLibrary("graphics.library", 0);
    LayersBase = OpenLibrary("layers.library", 0);

    if (!IntuitionBase || !GfxBase || !LayersBase)
	goto startupfail;
    addhand.is_Node.ln_Pri = 51;
    addhand.is_Code = (FPTR)handler;
    addhand.is_Data = NULL;

    if (OpenDevice("input.device", 0, ior, 0)) {
	goto startupfail;
    } else {
	SCR *scr = NULL;
	uword *SprSavePtr = NULL;

	Signal(dms->ShakeTask, 1 << dms->ShakeSig);
	ior->io_Command = IND_ADDHANDLER;
	ior->io_Data = (APTR)&addhand;
	DoIO(ior);
	for (;;) {
	    register long sigs = Wait(SBF_C|(1<<dms->Port.mp_SigBit));
	    if (sigs & (1 << dms->Port.mp_SigBit)) {
		register MSG *msg;
		while (msg = GetMsg(&dms->Port)) {
		    switch((long)msg->mn_Node.ln_Name) {
		    case REQ_SCREENON:
			if (scr)
			    CloseScreen(scr);
			scr = NULL;
			break;
		    case REQ_SCREENOFF:
			if (scr) {
			    ScreenToFront(scr);
			} else {
			    if (scr = OpenScreen(&Ns))
				SetRGB4(&scr->ViewPort, 0, 0, 0, 0);
			}
			break;
		    case REQ_MOUSEON:
			if (SprSavePtr) {
			    register COPINIT *ci = GfxBase->copinit;
			    ci->sprstrtup[1] = (ulong)SprSavePtr >> 16;
			    ci->sprstrtup[3] = (uword)(long)SprSavePtr;
			    SprSavePtr = NULL;
			}
			break;
		    case REQ_MOUSEOFF:
			{
			    register COPINIT *ci = GfxBase->copinit;
			    if (!SprSavePtr)
				SprSavePtr = (uword *)((ci->sprstrtup[1] << 16) | ci->sprstrtup[3]);
			    ci->sprstrtup[1] = (ulong)dms->NoSprData >> 16;
			    ci->sprstrtup[3] = (uword)(long)dms->NoSprData;
			}
			break;
		    case REQ_DOCMD:
			{
			    long fh = Open("nil:", 1006);
			    Execute(dms->Cmd, NULL, fh);
			    if (fh)
				Close(fh);
			}
			break;
		    }
		    FreeMem(msg, msg->mn_Length);
		}
	    }
	    if (sigs & SBF_C)
		break;
	}
	Forbid();
	ior->io_Command = IND_REMHANDLER;
	ior->io_Data = (APTR)&addhand;
	DoIO(ior);
	Permit();
	CloseDevice(ior);
	{
	    register MSG *msg;
	    while (msg = GetMsg(&dms->Port))
		FreeMem(msg, msg->mn_Length);
	}
	if (scr)
	    CloseScreen(scr);
	if (SprSavePtr) {
	    register COPINIT *ci = GfxBase->copinit;
	    ci->sprstrtup[1] = (ulong)SprSavePtr >> 16;
	    ci->sprstrtup[3] = (uword)(long)SprSavePtr;
	    SprSavePtr = NULL;
	}
    }
    goto closedown;
startupfail:
    dms->StartupError = 1;
    Signal(dms->ShakeTask, 1 << dms->ShakeSig);
    Wait(SBF_C);
closedown:
    DeleteStdIO(ior);
fail:
    if (IntuitionBase)
	CloseLibrary(IntuitionBase);
    if (GfxBase)
	CloseLibrary(GfxBase);
    if (LayersBase)
	CloseLibrary(LayersBase);
    Forbid();
    Signal(dms->ShakeTask, 1 << dms->ShakeSig);
}


#asm
	    ;	A0 = pointer to event linked list
	    ;	A1 = pointer to my data segment
	    ;	return new event linked list in D0

	    public  _CHandler

_handler:
	    movem.l D2/D3/A0/A1/A4/A6,-(sp)
	    jsr     _CHandler
	    movem.l (sp)+,D2/D3/A0/A1/A4/A6
	    rts

#endasm

/*
 *  (1) Accellerate mouse movements.
 *  (2) Auto-Select window
 */

IE *
CHandler(scr0, scr1, Ev)
IE *Ev;
{
    register IE *ev;
    register DMS *dms;
    static char STimedout;
    static char MTimedout;
    static long STime, MTime;

    geta4();
    dms = Dms;
    for (ev = Ev; ev; ev = Ev->ie_NextEvent) {
	switch(ev->ie_Class) {
	case IECLASS_RAWMOUSE:
	    /*
	     *	Mouse events restore both the screen and mouse pointer.
	     */

	    STime = ev->ie_TimeStamp.tv_secs + dms->STo;
	    MTime = ev->ie_TimeStamp.tv_secs + dms->MTo;
	    if (STimedout)
		sendrequest(REQ_SCREENON);
	    if (MTimedout)
		sendrequest(REQ_MOUSEON);
	    STimedout = MTimedout = 0;

	    /*
	     *	Mouse Acceleration
	     */
	    {
		register short n;
		register short s;

		if (dms->Acc != 1) {
		    n = ev->ie_X;
		    s = 1;
		    if (n < 0) {
			n = -n;
			s = -1;
		    }
		    if (n > dms->AThresh)
			ev->ie_X = s * (short)((n - dms->AThresh - 1) * dms->Acc + dms->AThresh + 1);
		    n = ev->ie_Y;
		    s = 1;
		    if (n < 0) {
			n = -n;
			s = -1;
		    }
		    if (n > dms->AThresh)
			ev->ie_Y = s * (short)((n - dms->AThresh - 1) * dms->Acc + dms->AThresh + 1);
		}
	    }

	    /*
	     *	Auto Activate and LMB (win/scrn front/bak)
	     */
	    if (dms->AAEnable | dms->LMBEnable) {
		register LAYER *layer;

		Forbid();
		layer = WhichMouseLayer();
		if (dms->LMBEnable && ev->ie_Code == IECODE_RBUTTON && (ev->ie_Qualifier & dms->RQual)) {
		    register WIN *win;
		    if (layer && (win = (WIN *)layer->Window) && !(win->Flags & BACKDROP) && (win->NextWindow || win->WScreen->FirstWindow != win))
			WindowToBack(layer->Window);
		    else if (IBASE->FirstScreen)
			ScreenToBack(IBASE->FirstScreen);
		    ev->ie_Class = IECLASS_NULL;    /*	remove event	*/
		}
		if (layer && layer->Window) {
		    if (dms->LMBEnable && ev->ie_Code == IECODE_LBUTTON && layer->ClipRect && layer->ClipRect->Next) {
			/*
			 *  Note: Case where it is the 'first' click in a series, where dms->CTime is
			 *	  garbage, works properly no matter what DoubleClick returns.
			 */
			if ((APTR)dms->CWin == layer->Window && DoubleClick(dms->CTime.tv_secs, dms->CTime.tv_micro, ev->ie_TimeStamp.tv_secs, ev->ie_TimeStamp.tv_micro))
			    --dms->CLeft;
			else
			    dms->CLeft = dms->Clicks - 1;
			dms->CTime = ev->ie_TimeStamp;
			dms->CWin = (WIN *)layer->Window;
			if (dms->CLeft == 0) {
			    dms->CLeft = dms->Clicks;
			    WindowToFront(layer->Window);
			}
		    }
		    if (dms->AAEnable && ev->ie_Code == IECODE_NOBUTTON && !(ev->ie_Qualifier & 0x7000) && layer->Window != IBASE->ActiveWindow)
			ActivateWindow(layer->Window);
		}
		Permit();
	    }
	    break;
	case IECLASS_RAWKEY:
	    /*
	     *	Keyboard events will kill the screen timeout but not
	     *	the mouse timeout.
	     */
	    {
		register LAYER *layer;

		Forbid();
		layer = WhichMouseLayer();
		if (layer && layer->Window) {
		    if (dms->AAEnable && layer->Window != IBASE->ActiveWindow)
			ActivateWindow(layer->Window);
		}
		Permit();
	    }
	    STime = ev->ie_TimeStamp.tv_secs + dms->STo;
	    if (STimedout)
		sendrequest(REQ_SCREENON);
	    STimedout = 0;
	    if (ev->ie_Code == dms->Code && ev->ie_Qualifier == dms->Qual) {
		sendrequest(REQ_DOCMD);
		ev->ie_Class = IECLASS_NULL;	/*  remove event    */
	    }
	    break;
	case IECLASS_TIMER:
	    /*
	     *	On a timer event, if timeout has occured execute the operation
	     *	and reset the timeout.	Note that this will cause continuous
	     *	timeouts every STo and MTo seconds... required because at any
	     *	time Intuition might turn the mouse back on or open a screen or
	     *	something and I want the blanker's to work in the long run.
	     */
	    {
		register long old;
		if (dms->STo && (old = STime - ev->ie_TimeStamp.tv_secs) < 0) {
		    STime = ev->ie_TimeStamp.tv_secs + dms->STo + 10;
		    STimedout = 1;
		    if (old > -10)
			sendrequest(REQ_SCREENOFF);
		}
		if (dms->MTo && (old = MTime - ev->ie_TimeStamp.tv_secs) < 0) {
		    MTime = ev->ie_TimeStamp.tv_secs + dms->MTo + 1;
		    MTimedout = 1;
		    if (old > -10)
			sendrequest(REQ_MOUSEOFF);
		}
	    }
	    break;
	}
    }
    return(Ev);
}


sendrequest(req)
long req;
{
    register MSG *msg = AllocMem(sizeof(MSG), MEMF_PUBLIC);

    if (msg) {
	msg->mn_Node.ln_Name = (char *)req;
	msg->mn_ReplyPort = NULL;
	msg->mn_Length = sizeof(MSG);
	PutMsg(&Dms->Port, msg);
    }
}

LAYER *
WhichMouseLayer()
{
    register struct IntuitionBase *ib = IBASE;
    register LAYER *layer = NULL;
    register SCR *scr = ib->FirstScreen;

    for (scr = ib->FirstScreen; scr; scr = scr->NextScreen) {
	register short mousey = ib->MouseY;
	if (!(scr->ViewPort.Modes & LACE))
	    mousey >>= 1;
	if (layer = WhichLayer(&scr->LayerInfo, ib->MouseX, mousey - scr->ViewPort.DyOffset))
	    break;
	if (mousey >= scr->ViewPort.DyOffset)
	    break;
    }
    return(layer);
}