[deb_xorg-server.git] / dix / selection.c

/************************************************************

Copyright 1987, 1989, 1998  The Open Group

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.

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.

Copyright 1987, 1989 by Digital Equipment Corporation, Maynard, 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 name of Digital 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.

********************************************************/

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include "windowstr.h"
#include "dixstruct.h"
#include "dispatch.h"
#include "selection.h"
#include "xace.h"

/*****************************************************************
 * Selection Stuff
 *
 *    dixLookupSelection
 *
 *   Selections are global to the server.  The list of selections should
 *   not be traversed directly.  Instead, use the functions listed above.
 *
 *****************************************************************/

Selection *CurrentSelections;
CallbackListPtr SelectionCallback;

int
dixLookupSelection(Selection ** result, Atom selectionName,
                   ClientPtr client, Mask access_mode)
{
    Selection *pSel;
    int rc = BadMatch;

    client->errorValue = selectionName;

    for (pSel = CurrentSelections; pSel; pSel = pSel->next)
        if (pSel->selection == selectionName)
            break;

    if (pSel)
        rc = XaceHookSelectionAccess(client, &pSel, access_mode);
    *result = pSel;
    return rc;
}

void
InitSelections(void)
{
    Selection *pSel, *pNextSel;

    pSel = CurrentSelections;
    while (pSel) {
        pNextSel = pSel->next;
        dixFreeObjectWithPrivates(pSel, PRIVATE_SELECTION);
        pSel = pNextSel;
    }

    CurrentSelections = NULL;
}

static _X_INLINE void
CallSelectionCallback(Selection * pSel, ClientPtr client,
                      SelectionCallbackKind kind)
{
    SelectionInfoRec info = { pSel, client, kind };
    CallCallbacks(&SelectionCallback, &info);
}

void
DeleteWindowFromAnySelections(WindowPtr pWin)
{
    Selection *pSel;

    for (pSel = CurrentSelections; pSel; pSel = pSel->next)
        if (pSel->pWin == pWin) {
            CallSelectionCallback(pSel, NULL, SelectionWindowDestroy);

            pSel->pWin = (WindowPtr) NULL;
            pSel->window = None;
            pSel->client = NullClient;
        }
}

void
DeleteClientFromAnySelections(ClientPtr client)
{
    Selection *pSel;

    for (pSel = CurrentSelections; pSel; pSel = pSel->next)
        if (pSel->client == client) {
            CallSelectionCallback(pSel, NULL, SelectionClientClose);

            pSel->pWin = (WindowPtr) NULL;
            pSel->window = None;
            pSel->client = NullClient;
        }
}

int
ProcSetSelectionOwner(ClientPtr client)
{
    WindowPtr pWin = NULL;
    TimeStamp time;
    Selection *pSel;
    int rc;

    REQUEST(xSetSelectionOwnerReq);
    REQUEST_SIZE_MATCH(xSetSelectionOwnerReq);

    UpdateCurrentTime();
    time = ClientTimeToServerTime(stuff->time);

    /* If the client's time stamp is in the future relative to the server's
       time stamp, do not set the selection, just return success. */
    if (CompareTimeStamps(time, currentTime) == LATER)
        return Success;

    if (stuff->window != None) {
        rc = dixLookupWindow(&pWin, stuff->window, client, DixSetAttrAccess);
        if (rc != Success)
            return rc;
    }
    if (!ValidAtom(stuff->selection)) {
        client->errorValue = stuff->selection;
        return BadAtom;
    }

    /*
     * First, see if the selection is already set...
     */
    rc = dixLookupSelection(&pSel, stuff->selection, client, DixSetAttrAccess);

    if (rc == Success) {
        /* If the timestamp in client's request is in the past relative
           to the time stamp indicating the last time the owner of the
           selection was set, do not set the selection, just return 
           success. */
        if (CompareTimeStamps(time, pSel->lastTimeChanged) == EARLIER)
            return Success;
        if (pSel->client && (!pWin || (pSel->client != client))) {
            xEvent event = {
                .u.selectionClear.time = time.milliseconds,
                .u.selectionClear.window = pSel->window,
                .u.selectionClear.atom = pSel->selection
            };
            event.u.u.type = SelectionClear;
            WriteEventsToClient(pSel->client, 1, &event);
        }
    }
    else if (rc == BadMatch) {
        /*
         * It doesn't exist, so add it...
         */
        pSel = dixAllocateObjectWithPrivates(Selection, PRIVATE_SELECTION);
        if (!pSel)
            return BadAlloc;

        pSel->selection = stuff->selection;

        /* security creation/labeling check */
        rc = XaceHookSelectionAccess(client, &pSel,
                                     DixCreateAccess | DixSetAttrAccess);
        if (rc != Success) {
            free(pSel);
            return rc;
        }

        pSel->next = CurrentSelections;
        CurrentSelections = pSel;
    }
    else
        return rc;

    pSel->lastTimeChanged = time;
    pSel->window = stuff->window;
    pSel->pWin = pWin;
    pSel->client = (pWin ? client : NullClient);

    CallSelectionCallback(pSel, client, SelectionSetOwner);
    return Success;
}

int
ProcGetSelectionOwner(ClientPtr client)
{
    int rc;
    Selection *pSel;
    xGetSelectionOwnerReply reply;

    REQUEST(xResourceReq);
    REQUEST_SIZE_MATCH(xResourceReq);

    if (!ValidAtom(stuff->id)) {
        client->errorValue = stuff->id;
        return BadAtom;
    }

    reply = (xGetSelectionOwnerReply) {
        .type = X_Reply,
        .sequenceNumber = client->sequence,
        .length = 0,
    };

    rc = dixLookupSelection(&pSel, stuff->id, client, DixGetAttrAccess);
    if (rc == Success)
        reply.owner = pSel->window;
    else if (rc == BadMatch)
        reply.owner = None;
    else
        return rc;

    WriteReplyToClient(client, sizeof(xGetSelectionOwnerReply), &reply);
    return Success;
}

int
ProcConvertSelection(ClientPtr client)
{
    Bool paramsOkay;
    xEvent event;
    WindowPtr pWin;
    Selection *pSel;
    int rc;

    REQUEST(xConvertSelectionReq);
    REQUEST_SIZE_MATCH(xConvertSelectionReq);

    rc = dixLookupWindow(&pWin, stuff->requestor, client, DixSetAttrAccess);
    if (rc != Success)
        return rc;

    paramsOkay = ValidAtom(stuff->selection) && ValidAtom(stuff->target);
    paramsOkay &= (stuff->property == None) || ValidAtom(stuff->property);
    if (!paramsOkay) {
        client->errorValue = stuff->property;
        return BadAtom;
    }

    rc = dixLookupSelection(&pSel, stuff->selection, client, DixReadAccess);

    memset(&event, 0, sizeof(xEvent));
    if (rc != Success && rc != BadMatch)
        return rc;
    else if (rc == Success && pSel->window != None) {
        event.u.u.type = SelectionRequest;
        event.u.selectionRequest.owner = pSel->window;
        event.u.selectionRequest.time = stuff->time;
        event.u.selectionRequest.requestor = stuff->requestor;
        event.u.selectionRequest.selection = stuff->selection;
        event.u.selectionRequest.target = stuff->target;
        event.u.selectionRequest.property = stuff->property;
        if (pSel->client && pSel->client != serverClient &&
            !pSel->client->clientGone) {
            WriteEventsToClient(pSel->client, 1, &event);
            return Success;
        }
    }

    event.u.u.type = SelectionNotify;
    event.u.selectionNotify.time = stuff->time;
    event.u.selectionNotify.requestor = stuff->requestor;
    event.u.selectionNotify.selection = stuff->selection;
    event.u.selectionNotify.target = stuff->target;
    event.u.selectionNotify.property = None;
    WriteEventsToClient(client, 1, &event);
    return Success;
}
Commit	Line	Data
	1	/************************************************************
	2
	3	Copyright 1987, 1989, 1998 The Open Group
	4
	5	Permission to use, copy, modify, distribute, and sell this software and its
	6	documentation for any purpose is hereby granted without fee, provided that
	7	the above copyright notice appear in all copies and that both that
	8	copyright notice and this permission notice appear in supporting
	9	documentation.
	10
	11	The above copyright notice and this permission notice shall be included in
	12	all copies or substantial portions of the Software.
	13
	14	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	17	OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
	18	AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	19	CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	20
	21	Except as contained in this notice, the name of The Open Group shall not be
	22	used in advertising or otherwise to promote the sale, use or other dealings
	23	in this Software without prior written authorization from The Open Group.
	24
	25	Copyright 1987, 1989 by Digital Equipment Corporation, Maynard, Massachusetts.
	26
	27	All Rights Reserved
	28
	29	Permission to use, copy, modify, and distribute this software and its
	30	documentation for any purpose and without fee is hereby granted,
	31	provided that the above copyright notice appear in all copies and that
	32	both that copyright notice and this permission notice appear in
	33	supporting documentation, and that the name of Digital not be
	34	used in advertising or publicity pertaining to distribution of the
	35	software without specific, written prior permission.
	36
	37	DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
	38	ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
	39	DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
	40	ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
	41	WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
	42	ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
	43	SOFTWARE.
	44
	45	********************************************************/
	46
	47	#ifdef HAVE_DIX_CONFIG_H
	48	#include <dix-config.h>
	49	#endif
	50
	51	#include "windowstr.h"
	52	#include "dixstruct.h"
	53	#include "dispatch.h"
	54	#include "selection.h"
	55	#include "xace.h"
	56
	57	/*****************************************************************
	58	* Selection Stuff
	59	*
	60	* dixLookupSelection
	61	*
	62	* Selections are global to the server. The list of selections should
	63	* not be traversed directly. Instead, use the functions listed above.
	64	*
	65	*****************************************************************/
	66
	67	Selection *CurrentSelections;
	68	CallbackListPtr SelectionCallback;
	69
	70	int
	71	dixLookupSelection(Selection ** result, Atom selectionName,
	72	ClientPtr client, Mask access_mode)
	73	{
	74	Selection *pSel;
	75	int rc = BadMatch;
	76
	77	client->errorValue = selectionName;
	78
	79	for (pSel = CurrentSelections; pSel; pSel = pSel->next)
	80	if (pSel->selection == selectionName)
	81	break;
	82
	83	if (pSel)
	84	rc = XaceHookSelectionAccess(client, &pSel, access_mode);
	85	*result = pSel;
	86	return rc;
	87	}
	88
	89	void
	90	InitSelections(void)
	91	{
	92	Selection pSel, pNextSel;
	93
	94	pSel = CurrentSelections;
	95	while (pSel) {
	96	pNextSel = pSel->next;
	97	dixFreeObjectWithPrivates(pSel, PRIVATE_SELECTION);
	98	pSel = pNextSel;
	99	}
	100
	101	CurrentSelections = NULL;
	102	}
	103
	104	static _X_INLINE void
	105	CallSelectionCallback(Selection * pSel, ClientPtr client,
	106	SelectionCallbackKind kind)
	107	{
	108	SelectionInfoRec info = { pSel, client, kind };
	109	CallCallbacks(&SelectionCallback, &info);
	110	}
	111
	112	void
	113	DeleteWindowFromAnySelections(WindowPtr pWin)
	114	{
	115	Selection *pSel;
	116
	117	for (pSel = CurrentSelections; pSel; pSel = pSel->next)
	118	if (pSel->pWin == pWin) {
	119	CallSelectionCallback(pSel, NULL, SelectionWindowDestroy);
	120
	121	pSel->pWin = (WindowPtr) NULL;
	122	pSel->window = None;
	123	pSel->client = NullClient;
	124	}
	125	}
	126
	127	void
	128	DeleteClientFromAnySelections(ClientPtr client)
	129	{
	130	Selection *pSel;
	131
	132	for (pSel = CurrentSelections; pSel; pSel = pSel->next)
	133	if (pSel->client == client) {
	134	CallSelectionCallback(pSel, NULL, SelectionClientClose);
	135
	136	pSel->pWin = (WindowPtr) NULL;
	137	pSel->window = None;
	138	pSel->client = NullClient;
	139	}
	140	}
	141
	142	int
	143	ProcSetSelectionOwner(ClientPtr client)
	144	{
	145	WindowPtr pWin = NULL;
	146	TimeStamp time;
	147	Selection *pSel;
	148	int rc;
	149
	150	REQUEST(xSetSelectionOwnerReq);
	151	REQUEST_SIZE_MATCH(xSetSelectionOwnerReq);
	152
	153	UpdateCurrentTime();
	154	time = ClientTimeToServerTime(stuff->time);
	155
	156	/* If the client's time stamp is in the future relative to the server's
	157	time stamp, do not set the selection, just return success. */
	158	if (CompareTimeStamps(time, currentTime) == LATER)
	159	return Success;
	160
	161	if (stuff->window != None) {
	162	rc = dixLookupWindow(&pWin, stuff->window, client, DixSetAttrAccess);
	163	if (rc != Success)
	164	return rc;
	165	}
	166	if (!ValidAtom(stuff->selection)) {
	167	client->errorValue = stuff->selection;
	168	return BadAtom;
	169	}
	170
	171	/*
	172	* First, see if the selection is already set...
	173	*/
	174	rc = dixLookupSelection(&pSel, stuff->selection, client, DixSetAttrAccess);
	175
	176	if (rc == Success) {
	177	/* If the timestamp in client's request is in the past relative
	178	to the time stamp indicating the last time the owner of the
	179	selection was set, do not set the selection, just return
	180	success. */
	181	if (CompareTimeStamps(time, pSel->lastTimeChanged) == EARLIER)
	182	return Success;
	183	if (pSel->client && (!pWin \|\| (pSel->client != client))) {
	184	xEvent event = {
	185	.u.selectionClear.time = time.milliseconds,
	186	.u.selectionClear.window = pSel->window,
	187	.u.selectionClear.atom = pSel->selection
	188	};
	189	event.u.u.type = SelectionClear;
	190	WriteEventsToClient(pSel->client, 1, &event);
	191	}
	192	}
	193	else if (rc == BadMatch) {
	194	/*
	195	* It doesn't exist, so add it...
	196	*/
	197	pSel = dixAllocateObjectWithPrivates(Selection, PRIVATE_SELECTION);
	198	if (!pSel)
	199	return BadAlloc;
	200
	201	pSel->selection = stuff->selection;
	202
	203	/* security creation/labeling check */
	204	rc = XaceHookSelectionAccess(client, &pSel,
	205	DixCreateAccess \| DixSetAttrAccess);
	206	if (rc != Success) {
	207	free(pSel);
	208	return rc;
	209	}
	210
	211	pSel->next = CurrentSelections;
	212	CurrentSelections = pSel;
	213	}
	214	else
	215	return rc;
	216
	217	pSel->lastTimeChanged = time;
	218	pSel->window = stuff->window;
	219	pSel->pWin = pWin;
	220	pSel->client = (pWin ? client : NullClient);
	221
	222	CallSelectionCallback(pSel, client, SelectionSetOwner);
	223	return Success;
	224	}
	225
	226	int
	227	ProcGetSelectionOwner(ClientPtr client)
	228	{
	229	int rc;
	230	Selection *pSel;
	231	xGetSelectionOwnerReply reply;
	232
	233	REQUEST(xResourceReq);
	234	REQUEST_SIZE_MATCH(xResourceReq);
	235
	236	if (!ValidAtom(stuff->id)) {
	237	client->errorValue = stuff->id;
	238	return BadAtom;
	239	}
	240
	241	reply = (xGetSelectionOwnerReply) {
	242	.type = X_Reply,
	243	.sequenceNumber = client->sequence,
	244	.length = 0,
	245	};
	246
	247	rc = dixLookupSelection(&pSel, stuff->id, client, DixGetAttrAccess);
	248	if (rc == Success)
	249	reply.owner = pSel->window;
	250	else if (rc == BadMatch)
	251	reply.owner = None;
	252	else
	253	return rc;
	254
	255	WriteReplyToClient(client, sizeof(xGetSelectionOwnerReply), &reply);
	256	return Success;
	257	}
	258
	259	int
	260	ProcConvertSelection(ClientPtr client)
	261	{
	262	Bool paramsOkay;
	263	xEvent event;
	264	WindowPtr pWin;
	265	Selection *pSel;
	266	int rc;
	267
	268	REQUEST(xConvertSelectionReq);
	269	REQUEST_SIZE_MATCH(xConvertSelectionReq);
	270
	271	rc = dixLookupWindow(&pWin, stuff->requestor, client, DixSetAttrAccess);
	272	if (rc != Success)
	273	return rc;
	274
	275	paramsOkay = ValidAtom(stuff->selection) && ValidAtom(stuff->target);
	276	paramsOkay &= (stuff->property == None) \|\| ValidAtom(stuff->property);
	277	if (!paramsOkay) {
	278	client->errorValue = stuff->property;
	279	return BadAtom;
	280	}
	281
	282	rc = dixLookupSelection(&pSel, stuff->selection, client, DixReadAccess);
	283
	284	memset(&event, 0, sizeof(xEvent));
	285	if (rc != Success && rc != BadMatch)
	286	return rc;
	287	else if (rc == Success && pSel->window != None) {
	288	event.u.u.type = SelectionRequest;
	289	event.u.selectionRequest.owner = pSel->window;
	290	event.u.selectionRequest.time = stuff->time;
	291	event.u.selectionRequest.requestor = stuff->requestor;
	292	event.u.selectionRequest.selection = stuff->selection;
	293	event.u.selectionRequest.target = stuff->target;
	294	event.u.selectionRequest.property = stuff->property;
	295	if (pSel->client && pSel->client != serverClient &&
	296	!pSel->client->clientGone) {
	297	WriteEventsToClient(pSel->client, 1, &event);
	298	return Success;
	299	}
	300	}
	301
	302	event.u.u.type = SelectionNotify;
	303	event.u.selectionNotify.time = stuff->time;
	304	event.u.selectionNotify.requestor = stuff->requestor;
	305	event.u.selectionNotify.selection = stuff->selection;
	306	event.u.selectionNotify.target = stuff->target;
	307	event.u.selectionNotify.property = None;
	308	WriteEventsToClient(client, 1, &event);
	309	return Success;
	310	}