/***********************************************************
Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
and the Massachusetts Institute of Technology, Cambridge, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the names of Digital or MIT not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

******************************************************************/
/* $Header: property.c,v 1.44 87/06/14 22:35:02 sue Exp $ */

#include "X.h"
#define NEED_REPLIES
#define NEED_EVENTS
#include "Xproto.h"
#include "windowstr.h"
#include "propertyst.h"
#include "dixstruct.h"
#include "opaque.h"

extern void (*ReplySwapVector[]) ();

/*****************************************************************
 * Property Stuff
 *
 *    ChangeProperty, DeleteProperty, GetProperties,
 *    ListProperties
 *
 *   Properties below to windows.  A allocate slots each time
 *   a property is added.  No fancy searching done.
 *
 *****************************************************************/

static void
PrintPropertys(pWin)
    WindowPtr pWin;
{
    PropertyPtr pProp;
    register int j;

    pProp = pWin->userProps;
    while (pProp)
    {
        ErrorF(  "%x %x\n", pProp->propertyName, pProp->type);
        ErrorF("property format: %d\n", pProp->format);
        ErrorF("property data: \n");
        for (j=0; j<(pProp->format/8)*pProp->size; j++)
           ErrorF("%c\n", pProp->data[j]);
        pProp = pProp->next;
    }
}


int
ProcRotateProperties(client)
    ClientPtr client;
{
    int     i, j, delta;
    REQUEST(xRotatePropertiesReq);
    WindowPtr pWin;
    register    Atom * atoms;
    PropertyPtr * props;               /* array of pointer */
    PropertyPtr pProp;

    REQUEST_AT_LEAST_SIZE(xRotatePropertiesReq);
    if (stuff->length != (sizeof(xRotatePropertiesReq)+stuff->nAtoms+3) >> 2)
        return BadLength;
    pWin = (WindowPtr) LookupWindow(stuff->window, client);
    if (!pWin)
        return(BadWindow);
    atoms = (Atom *) & stuff[1];
    props = (PropertyPtr *)ALLOCATE_LOCAL((int)stuff->nAtoms * sizeof(PropertyPtr));
    for (i = 0; i < stuff->nAtoms; i++)
    {
        if (!ValidAtom(atoms[i]))
        {
            DEALLOCATE_LOCAL(props);
            return BadAtom;
        }
        for (j = i + 1; j < stuff->nAtoms; j++)
            if (atoms[j] == atoms[i])
            {
                DEALLOCATE_LOCAL(props);
                return BadMatch;
            }
        pProp = pWin->userProps;
        while (pProp)
        {
            if (pProp->propertyName == atoms[j])
                goto found;
        }
        DEALLOCATE_LOCAL(props);
        return BadMatch;
found: 
        props[i] = pProp;
    }
    delta = stuff->nPositions;
    while (delta < 0)                  /* faster if abs value is small */
        delta += stuff->nAtoms;
    for (i = 0; i < stuff->nAtoms; i++)
        props[i]->propertyName = atoms[(i + delta) % stuff->nAtoms];
    return Success;
}

int 
ProcChangeProperty(client)
    ClientPtr client;
{	      
    WindowPtr pWin;
    char format, mode;
    int len;
    PropertyPtr pProp;
    xEvent event;
    int sizeInBytes;
    REQUEST(xChangePropertyReq);

    REQUEST_AT_LEAST_SIZE(xChangePropertyReq);
    format = stuff->format;
    mode = stuff->mode;
    if ((mode != PropModeReplace) && (mode != PropModeAppend) &&
	(mode != PropModePrepend) && (format != 8) &&
	(format != 16) && (format != 32))
        return BadValue;

    pWin = (WindowPtr)LookupWindow(stuff->window, client);
    if (!pWin)
	return(BadWindow);
    if (!(ValidAtom(stuff->property)  && ValidAtom(stuff->type)))
	return(BadAtom);

    /* first see if property already exists */

    len = stuff->nUnits;
    sizeInBytes = format/8;
    pProp = pWin->userProps;
    while (pProp)
    {
	if (pProp->propertyName ==stuff->property) 
	    break;
	pProp = pProp->next;
    }
    if (!pProp)   /* just add to list */
    {
        pProp = (PropertyPtr)Xalloc(sizeof(PropertyRec));
        pProp->propertyName = stuff->property;
        pProp->type = stuff->type;
        pProp->format = format;
        pProp->data = (pointer)Xalloc(sizeInBytes  * len);
        bcopy(&stuff[1], pProp->data, len * sizeInBytes);
	pProp->size = len;
        pProp->next = pWin->userProps;
        pWin->userProps = pProp;
    }
    else
    {
    
        if ((format != pProp->format) && (mode != PropModeReplace))
	    return(BadMatch);
        if (pProp->type != stuff->type)
            return(BadMatch);
				/* XXX should check length too */
        if (mode == PropModeReplace) 
        {
            pProp->data = (pointer)Xrealloc((char *) pProp->data,
					    sizeInBytes * len);
	    bcopy(&stuff[1], pProp->data, len * sizeInBytes);    
	    pProp->size = len;
	}
        else if (mode == PropModeAppend)
        {
            pProp->data = (pointer)Xrealloc((char *) pProp->data,
				(int)sizeInBytes * (len + pProp->size));
	    bcopy(&stuff[1], &pProp->data[pProp->size * sizeInBytes], 
		  len * sizeInBytes);
            pProp->size += len;
	}
        else if (mode == PropModePrepend)
        {
            pointer tstr = pProp->data;
            pProp->data = (pointer)Xalloc((int)sizeInBytes * (len + pProp->size));
	    bcopy(tstr, &pProp->data[len * sizeInBytes], 
		  (int)pProp->size * sizeInBytes);
            bcopy(&stuff[1], pProp->data, len * sizeInBytes);
            pProp->size += len;
	    Xfree(tstr);
	}
    }
    event.u.u.type = PropertyNotify;
    event.u.property.window = pWin->wid;
    event.u.property.state = PropertyNewValue;
    event.u.property.atom = pProp->propertyName;
    DeliverEvents(pWin, &event, 1, (long)0);

    return(client->noClientException);
}

DeleteProperty(pWin, propName)
    WindowPtr pWin;
    ATOM propName;
{
    PropertyPtr pProp, prevProp;
    xEvent event;

    if (!(pProp = pWin->userProps))
	return(BadAtom);
    prevProp = (PropertyPtr)NULL;
    while (pProp)
    {
	if (pProp->propertyName == propName)
	    break;
        prevProp = pProp;
	pProp = pProp->next;
    }
    if (pProp) 
    {		    
        if (prevProp == (PropertyPtr)NULL)      /* takes care of head */
        {
            pWin->userProps = pProp->next;
        }
	else
        {
            prevProp->next = pProp->next;
        }
	Xfree(pProp->data);
        Xfree(pProp);

	event.u.u.type = PropertyNotify;
	event.u.property.window = pWin->wid;
	event.u.property.state = PropertyDelete;
        event.u.property.atom = pProp->propertyName;
	DeliverEvents(pWin, &event, 1, (long)0);

        return(Success);
    }
    else 
	return(BadAtom);
}

DeleteAllWindowProperties(pWin)
    WindowPtr pWin;
{
    PropertyPtr pProp, pNextProp;
    xEvent event;

    pProp = pWin->userProps;
    while (pProp)
    {
	event.u.u.type = PropertyNotify;
	event.u.property.window = pWin->wid;
	event.u.property.state = PropertyDelete;
	event.u.property.atom = pProp->propertyName;
	DeliverEvents(pWin, &event, 1, (long)0);
	pNextProp = pProp->next;
        Xfree(pProp->data);
        Xfree(pProp);
	pProp = pNextProp;
    }
}

/*****************
 * GetProperty
 *    If type Any is specified, returns the property from the specified
 *    window regardless of its type.  If a type is specified, returns the
 *    property only if its type equals the specified type.
 *    If delete is True and a property is returned, the property is also
 *    deleted from the window and a PropertyNotify event is generated on the
 *    window.
 *****************/

int
ProcGetProperty(client)
    ClientPtr client;
{
    PropertyPtr pProp, prevProp;
    int n, len, ind;
    WindowPtr pWin;
    xGetPropertyReply reply;
    REQUEST(xGetPropertyReq);

    REQUEST_SIZE_MATCH(xGetPropertyReq);
    pWin = (WindowPtr)LookupWindow(stuff->window, client);
    client->errorValue = stuff->window;
    if (pWin)
    {
	if (ValidAtom(stuff->property) && 
	    ((stuff->type == AnyPropertyType) || ValidAtom(stuff->type)))
	{
	    pProp = pWin->userProps;
            prevProp = (PropertyPtr)NULL;
            while (pProp)
            {
	        if (pProp->propertyName == stuff->property) 
	            break;
		prevProp = pProp;
		pProp = pProp->next;
            }
	    reply.type = X_Reply;
	    reply.sequenceNumber = client->sequence;
            if (pProp) 
            {
                if ((stuff->type != pProp->type) &&
		    (stuff->type != AnyPropertyType))
                        return(BadMatch);
	    /*
             *  Return type, format, value to client
             */
		n = (pProp->format/8) * pProp->size; /* size (bytes) of prop */
		ind = stuff->longOffset << 2;        
		len = min(n - ind, 4 * stuff->longLength);
		reply.bytesAfter = n - (ind + len);
		reply.format = pProp->format;
		reply.length = len >> 2;
		reply.nItems = pProp->size;
		reply.propertyType = pProp->type;
		WriteReplyToClient(client, sizeof(xGenericReply), &reply);
		WriteReplyToClient(client, len, pProp->data + ind);

                if (stuff->delete)    /* delete the Property */
                {
		    xEvent event;

                    if (prevProp == (PropertyPtr)NULL) /* takes care of head */
                        pWin->userProps = pProp->next;
	            else
                        prevProp->next = pProp->next;
		    Xfree(pProp->data);
                    Xfree(pProp);
		    event.u.u.type = PropertyNotify;
		    event.u.property.window = pWin->wid;
		    event.u.property.state = PropertyDelete;
		    event.u.property.atom = pProp->propertyName;
		    DeliverEvents(pWin, &event, 1, (long)0);
		}
	    }
            else 
	    {
		reply.length = 0;
		reply.bytesAfter = 0;
		reply.propertyType = None;
		reply.format = 0;
		WriteReplyToClient(client, sizeof(xGenericReply), &reply);
	    }
            return(client->noClientException);

	}
        else
            return(BadAtom);
    }
    else            
        return (BadWindow); 
}

int
ProcListProperties(client)
    ClientPtr client;
{
    Atom *pAtoms;
    xListPropertiesReply xlpr;
    int	numProps = 0;
    WindowPtr pWin;
    PropertyPtr pProp;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)LookupWindow(stuff->id, client);
    if (!pWin)
        return(BadWindow);

    pProp = pWin->userProps;
    while (pProp)
    {        
        pProp = pProp->next;
	numProps++;
    }
    if (numProps)
        if(!(pAtoms = (Atom *)ALLOCATE_LOCAL(numProps * sizeof(Atom))))
            return(client->noClientException = BadAlloc);

    xlpr.type = X_Reply;
    xlpr.nProperties = numProps;
    xlpr.length = (numProps * sizeof(Atom)) >> 2;
    xlpr.sequenceNumber = client->sequence;
    pProp = pWin->userProps;
    while (pProp)
    {
	*pAtoms++ = pProp->propertyName;
	pProp = pProp->next;
    }
    WriteReplyToClient(client, sizeof(xGenericReply), &xlpr);
    if (numProps);
    {
        WriteReplyToClient(client, numProps * sizeof(Atom), pAtoms);
        DEALLOCATE_LOCAL(pAtoms);
    }
    return(client->noClientException);
}