/*
 * Copyright © 2006 Keith Packard
 *
 * 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, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS 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.
 */

#include "randrstr.h"

Bool
RRClientKnowsRates (ClientPtr	pClient)
{
    rrClientPriv(pClient);

    return (pRRClient->major_version > 1 ||
	    (pRRClient->major_version == 1 && pRRClient->minor_version >= 1));
}

static int
ProcRRQueryVersion (ClientPtr client)
{
    xRRQueryVersionReply rep;
    register int n;
    REQUEST(xRRQueryVersionReq);
    rrClientPriv(client);

    REQUEST_SIZE_MATCH(xRRQueryVersionReq);
    pRRClient->major_version = stuff->majorVersion;
    pRRClient->minor_version = stuff->minorVersion;
    rep.type = X_Reply;
    rep.length = 0;
    rep.sequenceNumber = client->sequence;
    /*
     * Report the current version; the current
     * spec says they're all compatible after 1.0
     */
    rep.majorVersion = RANDR_MAJOR;
    rep.minorVersion = RANDR_MINOR;
    if (client->swapped) {
    	swaps(&rep.sequenceNumber, n);
    	swapl(&rep.length, n);
	swapl(&rep.majorVersion, n);
	swapl(&rep.minorVersion, n);
    }
    WriteToClient(client, sizeof(xRRQueryVersionReply), (char *)&rep);
    return (client->noClientException);
}

static int
ProcRRSelectInput (ClientPtr client)
{
    REQUEST(xRRSelectInputReq);
    rrClientPriv(client);
    RRTimesPtr	pTimes;
    WindowPtr	pWin;
    RREventPtr	pRREvent, *pHead;
    XID		clientResource;

    REQUEST_SIZE_MATCH(xRRSelectInputReq);
    pWin = SecurityLookupWindow (stuff->window, client, SecurityWriteAccess);
    if (!pWin)
	return BadWindow;
    pHead = (RREventPtr *)SecurityLookupIDByType(client,
						 pWin->drawable.id, RREventType,
						 SecurityWriteAccess);

    if (stuff->enable & (RRScreenChangeNotifyMask|
			 RRCrtcChangeNotifyMask|
			 RROutputChangeNotifyMask)) 
    {
	ScreenPtr	pScreen = pWin->drawable.pScreen;
	rrScrPriv	(pScreen);

	pRREvent = NULL;
	if (pHead) 
	{
	    /* check for existing entry. */
	    for (pRREvent = *pHead; pRREvent; pRREvent = pRREvent->next)
		if (pRREvent->client == client)
		    break;
	}

	if (!pRREvent)
	{
	    /* build the entry */
	    pRREvent = (RREventPtr) xalloc (sizeof (RREventRec));
	    if (!pRREvent)
		return BadAlloc;
	    pRREvent->next = 0;
	    pRREvent->client = client;
	    pRREvent->window = pWin;
	    pRREvent->mask = stuff->enable;
	    /*
	     * add a resource that will be deleted when
	     * the client goes away
	     */
	    clientResource = FakeClientID (client->index);
	    pRREvent->clientResource = clientResource;
	    if (!AddResource (clientResource, RRClientType, (pointer)pRREvent))
		return BadAlloc;
	    /*
	     * create a resource to contain a pointer to the list
	     * of clients selecting input.  This must be indirect as
	     * the list may be arbitrarily rearranged which cannot be
	     * done through the resource database.
	     */
	    if (!pHead)
	    {
		pHead = (RREventPtr *) xalloc (sizeof (RREventPtr));
		if (!pHead ||
		    !AddResource (pWin->drawable.id, RREventType, (pointer)pHead))
		{
		    FreeResource (clientResource, RT_NONE);
		    return BadAlloc;
		}
		*pHead = 0;
	    }
	    pRREvent->next = *pHead;
	    *pHead = pRREvent;
	}
	/*
	 * Now see if the client needs an event
	 */
	if (pScrPriv && (pRREvent->mask & RRScreenChangeNotifyMask))
	{
	    pTimes = &((RRTimesPtr) (pRRClient + 1))[pScreen->myNum];
	    if (CompareTimeStamps (pTimes->setTime, 
				   pScrPriv->lastSetTime) != 0 ||
		CompareTimeStamps (pTimes->configTime, 
				   pScrPriv->lastConfigTime) != 0)
	    {
		RRDeliverScreenEvent (client, pWin, pScreen);
	    }
	}
    }
    else if (stuff->enable == 0) 
    {
	/* delete the interest */
	if (pHead) {
	    RREventPtr pNewRREvent = 0;
	    for (pRREvent = *pHead; pRREvent; pRREvent = pRREvent->next) {
		if (pRREvent->client == client)
		    break;
		pNewRREvent = pRREvent;
	    }
	    if (pRREvent) {
		FreeResource (pRREvent->clientResource, RRClientType);
		if (pNewRREvent)
		    pNewRREvent->next = pRREvent->next;
		else
		    *pHead = pRREvent->next;
		xfree (pRREvent);
	    }
	}
    }
    else 
    {
	client->errorValue = stuff->enable;
	return BadValue;
    }
    return Success;
}

int (*ProcRandrVector[RRNumberRequests])(ClientPtr) = {
    ProcRRQueryVersion,	/* 0 */
/* we skip 1 to make old clients fail pretty immediately */
    NULL,			/* 1 ProcRandrOldGetScreenInfo */
/* V1.0 apps share the same set screen config request id */
    ProcRRSetScreenConfig,	/* 2 */
    NULL,			/* 3 ProcRandrOldScreenChangeSelectInput */
/* 3 used to be ScreenChangeSelectInput; deprecated */
    ProcRRSelectInput,		/* 4 */
    ProcRRGetScreenInfo,    	/* 5 */
/* V1.2 additions */
    ProcRRGetScreenSizeRange,	/* 6 */
    ProcRRSetScreenSize,	/* 7 */
    ProcRRGetScreenResources,	/* 8 */
    ProcRRGetOutputInfo,	/* 9 */
    ProcRRListOutputProperties,	/* 10 */
    ProcRRChangeOutputProperty,	/* 11 */
    ProcRRDeleteOutputProperty,	/* 12 */
    ProcRRGetOutputProperty,	/* 13 */
    ProcRRCreateMode,		/* 14 */
    ProcRRDestroyMode,		/* 15 */
    ProcRRAddOutputMode,	/* 16 */
    ProcRRDeleteOutputMode,	/* 17 */
    ProcRRGetCrtcInfo,		/* 18 */
    ProcRRSetCrtcConfig,	/* 19 */
    ProcRRGetCrtcGammaSize,	/* 20 */
    ProcRRGetCrtcGamma,		/* 21 */
    ProcRRSetCrtcGamma,		/* 22 */
};