/*
 *  DMOUSE-HANDLER.C		compile 32 bit integers (+L), c32.lib
 *				AZTEC COMPILATION
 *  28 June 1988
 *
 *  Note on upping the handler process priority.  This is done to cause the
 *  handler task to get CPU before the current input event completes its
 *  processing so intuition calls made by the process are executed before
 *  the event is propogated.  If said intuition calls block, it's ok
 *  because they are not blocking the input handler process.
 */

#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 DummyIE = { 0 };

IE *handler();

short	NRMe;	/*  Don't Repeat Mouse Events   */

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

    {
	register PROC *proc = (PROC *)FindTask(NULL);
	proc->pr_ConsoleTask = NULL;
    }
    NRMe = 0;
    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 = dms->IPri;
    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;
	ior->io_Message.mn_Node.ln_Type = NT_MESSAGE;
	DoIO(ior);
	for (;;) {
	    register long sigs = Wait(SBF_C|(1<<dms->Port.mp_SigBit));
	    if (sigs & (1 << dms->Port.mp_SigBit)) {
		register REQ *msg;
		while (msg = GetMsg(&dms->Port)) {
		    switch((long)msg->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;
		    case REQ_RAWMOUSE:
			{
			    register LAYER *layer;

			    NRMe = 0;
			    Forbid();
			    layer = WhichMouseLayer();
			    if (msg->ie_Code == IECODE_RBUTTON && dms->LMBEnable && (msg->ie_Qualifier & dms->RQual)) {
				register WIN *win;
				if (layer && (win = (WIN *)layer->Window) && !(win->Flags & BACKDROP) && (win->NextWindow || win->WScreen->FirstWindow != win)) {
				    if (dms->Workbench)
					WindowToBack(win);
				    else
					BehindLayer(0, layer);
				} else if (IBASE->FirstScreen)
				    ScreenToBack(IBASE->FirstScreen);
			    }
			    if (layer && layer->Window) {
				if (msg->ie_Code == IECODE_LBUTTON && !(((WIN *)layer->Window)->Flags & BACKDROP) && dms->LMBEnable && 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 (dms->LQual == 0 || (msg->ie_Qualifier & dms->LQual)) {
					if ((APTR)dms->CWin == layer->Window && DoubleClick(dms->CTime.tv_secs, dms->CTime.tv_micro, msg->ie_TimeStamp.tv_secs, msg->ie_TimeStamp.tv_micro))
					    --dms->CLeft;
					else
					    dms->CLeft = dms->Clicks - 1;
					dms->CTime = msg->ie_TimeStamp;
					dms->CWin = (WIN *)layer->Window;
					if (dms->CLeft == 0) {
					    dms->CLeft = dms->Clicks;
					    if (dms->Workbench)
						WindowToFront(layer->Window);
					    else
						UpfrontLayer(0, layer);
					}
				    }
				}
				if (dms->AAEnable && layer->Window != IBASE->ActiveWindow && msg->ie_Code == IECODE_NOBUTTON && !(msg->ie_Qualifier & 0x7000))
				    ActivateWindow(layer->Window);
			    }
			    Permit();
			}
			break;
		    case REQ_RAWKEY:
			{
			    register LAYER *layer;

			    Forbid();
			    layer = WhichMouseLayer();
			    if (layer && layer->Window && layer->Window != IBASE->ActiveWindow)
				ActivateWindow(layer->Window);
			    Permit();
			}
			break;
		    }
		    FreeMem(msg, msg->Msg.mn_Length);
		}
	    }
	    if (sigs & SBF_C)
		break;
	}
	ior->io_Command = IND_REMHANDLER;
	ior->io_Data = (APTR)&addhand;
	ior->io_Message.mn_Node.ln_Type = NT_MESSAGE;
	DoIO(ior);
	ior->io_Command = IND_WRITEEVENT;	/*  NULL EVENT	*/
	ior->io_Length = sizeof(IE);
	ior->io_Data = (APTR)&DummyIE;
	ior->io_Message.mn_Node.ln_Type = NT_MESSAGE;
	DoIO(ior);
	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, ev);
	    if (MTimedout)
		sendrequest(REQ_MOUSEON, ev);
	    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->LMBEnable && ev->ie_Code == IECODE_RBUTTON && (ev->ie_Qualifier & dms->RQual))
		ev->ie_Class = IECLASS_NULL;	/*  remove event    */
	    if (NRMe == 0 && ((dms->AAEnable & 1) || dms->LMBEnable)) {
		register short old;
		NRMe = 1;
		if (ev->ie_Code != IECODE_NOBUTTON)
		    old = SetTaskPri(dms->Port.mp_SigTask, 21);
		sendrequest(REQ_RAWMOUSE, ev);
		if (ev->ie_Code != IECODE_NOBUTTON)
		    SetTaskPri(dms->Port.mp_SigTask, old);
	    }
	    break;
	case IECLASS_RAWKEY:
	    /*
	     *	Keyboard events will kill the screen timeout but not
	     *	the mouse timeout.  Note that the priority of the
	     *	co-process must be upped to ensure it is able to make the
	     *	window active before the keystroke is passed further.
	     */

	    if (dms->AAEnable & 2) {
		register short old = SetTaskPri(dms->Port.mp_SigTask, 21);
		sendrequest(REQ_RAWKEY, ev);
		SetTaskPri(dms->Port.mp_SigTask, old);
	    }
	    STime = ev->ie_TimeStamp.tv_secs + dms->STo;
	    if (STimedout) {
		sendrequest(REQ_SCREENON, ev);
		if (dms->MTo == 0)
		    sendrequest(REQ_MOUSEON, ev);
	    }
	    STimedout = 0;
	    if (ev->ie_Code == dms->Code && ev->ie_Qualifier == dms->Qual) {
		sendrequest(REQ_DOCMD, ev);
		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->Reset) {
		    dms->Reset = 0;
		    STime = ev->ie_TimeStamp.tv_secs + dms->STo;
		    MTime = ev->ie_TimeStamp.tv_secs + dms->MTo;
		}
		if (dms->STo && (old = STime - ev->ie_TimeStamp.tv_secs) < 0) {
		    STime = ev->ie_TimeStamp.tv_secs + dms->STo + 10;
		    STimedout = 1;
		    MTimedout = 1;
		    if (old > -10) {
			sendrequest(REQ_SCREENOFF, ev);
			sendrequest(REQ_MOUSEOFF, ev);
		    }
		}
		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, ev);
		}
	    }
	    break;
	}
    }
    return(Ev);
}

sendrequest(creq, ev)
long creq;
register IE *ev;
{
    register REQ *req = AllocMem(sizeof(REQ), MEMF_PUBLIC);

    if (req) {
	req->Msg.mn_Node.ln_Name = (char *)creq;
	req->Msg.mn_ReplyPort = NULL;
	req->Msg.mn_Length = sizeof(REQ);
	req->ie_Code = ev->ie_Code;
	req->ie_Qualifier = ev->ie_Qualifier;
	req->ie_TimeStamp = ev->ie_TimeStamp;
	PutMsg(&Dms->Port, req);
    }
}

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