382 lines
10 KiB
C
382 lines
10 KiB
C
/*
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Copyright 2007 Peter Hutterer <peter@cs.unisa.edu.au>
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of the author shall
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not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization
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from the author.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "windowstr.h"
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#include <X11/extensions/ge.h>
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#include "geint.h"
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#include "geext.h"
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int GEEventBase;
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int GEErrorBase;
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int GEClientPrivateIndex;
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int GEEventType; /* The opcode for all GenericEvents will have. */
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GEExtension GEExtensions[MAXEXTENSIONS];
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/* Major available requests */
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static const int version_requests[] = {
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X_GEQueryVersion, /* before client sends QueryVersion */
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X_GEQueryVersion, /* must be set to last request in version 1 */
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};
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/* Forward declarations */
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static void SGEGenericEvent(xEvent* from, xEvent* to);
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#define NUM_VERSION_REQUESTS (sizeof (version_requests) / sizeof (version_requests[0]))
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/************************************************************/
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/* request handlers */
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/************************************************************/
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static int ProcGEQueryVersion(ClientPtr client)
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{
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int n;
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GEClientInfoPtr pGEClient = GEGetClient(client);
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xGEQueryVersionReply rep;
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REQUEST(xGEQueryVersionReq);
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REQUEST_SIZE_MATCH(xGEQueryVersionReq);
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rep.repType = X_Reply;
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rep.RepType = X_GEQueryVersion;
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rep.length = 0;
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rep.sequenceNumber = client->sequence;
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if (stuff->majorVersion < GE_MAJOR) {
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rep.majorVersion = stuff->majorVersion;
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rep.minorVersion = stuff->minorVersion;
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} else {
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rep.majorVersion = GE_MAJOR;
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if (stuff->majorVersion == GE_MAJOR &&
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stuff->minorVersion < GE_MINOR)
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rep.minorVersion = stuff->minorVersion;
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else
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rep.minorVersion = GE_MINOR;
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}
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pGEClient->major_version = rep.majorVersion;
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pGEClient->minor_version = rep.minorVersion;
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if (client->swapped)
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{
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swaps(&rep.sequenceNumber, n);
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swapl(&rep.length, n);
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swaps(&rep.majorVersion, n);
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swaps(&rep.minorVersion, n);
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}
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WriteToClient(client, sizeof(xGEQueryVersionReply), (char*)&rep);
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return(client->noClientException);
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}
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int (*ProcGEVector[GENumberRequests])(ClientPtr) = {
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/* Version 1.0 */
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ProcGEQueryVersion
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};
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/************************************************************/
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/* swapped request handlers */
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/************************************************************/
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static int
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SProcGEQueryVersion(ClientPtr client)
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{
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int n;
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REQUEST(xGEQueryVersionReq);
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swaps(&stuff->length, n);
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REQUEST_SIZE_MATCH(xGEQueryVersionReq);
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swaps(&stuff->majorVersion, n);
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swaps(&stuff->minorVersion, n);
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return(*ProcGEVector[stuff->ReqType])(client);
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}
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int (*SProcGEVector[GENumberRequests])(ClientPtr) = {
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/* Version 1.0 */
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SProcGEQueryVersion
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};
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/************************************************************/
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/* callbacks */
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/************************************************************/
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/* dispatch requests */
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static int
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ProcGEDispatch(ClientPtr client)
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{
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GEClientInfoPtr pGEClient = GEGetClient(client);
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REQUEST(xGEReq);
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if (pGEClient->major_version >= NUM_VERSION_REQUESTS)
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return BadRequest;
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if (stuff->ReqType > version_requests[pGEClient->major_version])
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return BadRequest;
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return (ProcGEVector[stuff->ReqType])(client);
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}
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/* dispatch swapped requests */
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static int
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SProcGEDispatch(ClientPtr client)
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{
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REQUEST(xGEReq);
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if (stuff->ReqType >= GENumberRequests)
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return BadRequest;
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return (*SProcGEVector[stuff->ReqType])(client);
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}
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/* new client callback */
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static void GEClientCallback(CallbackListPtr *list,
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pointer closure,
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pointer data)
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{
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NewClientInfoRec *clientinfo = (NewClientInfoRec *) data;
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ClientPtr pClient = clientinfo->client;
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GEClientInfoPtr pGEClient = GEGetClient(pClient);
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pGEClient->major_version = 0;
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pGEClient->minor_version = 0;
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}
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/* reset extension */
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static void
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GEResetProc(ExtensionEntry *extEntry)
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{
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DeleteCallback(&ClientStateCallback, GEClientCallback, 0);
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EventSwapVector[GenericEvent] = NotImplemented;
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GEEventBase = 0;
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GEErrorBase = 0;
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GEEventType = 0;
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}
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/* Calls the registered event swap function for the extension. */
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static void
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SGEGenericEvent(xEvent* from, xEvent* to)
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{
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xGenericEvent* gefrom = (xGenericEvent*)from;
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xGenericEvent* geto = (xGenericEvent*)to;
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if (gefrom->extension > MAXEXTENSIONS)
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{
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ErrorF("GE: Invalid extension offset for event.\n");
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return;
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}
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if (GEExtensions[gefrom->extension & 0x7F].evswap)
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GEExtensions[gefrom->extension & 0x7F].evswap(gefrom, geto);
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}
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/* init extension, register at server */
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void
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GEExtensionInit(void)
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{
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ExtensionEntry *extEntry;
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GEClientPrivateIndex = AllocateClientPrivateIndex();
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if (!AllocateClientPrivate(GEClientPrivateIndex,
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sizeof(GenericMaskRec)))
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{
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FatalError("GEExtensionInit: Alloc client private failed.\n");
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}
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if(!AddCallback(&ClientStateCallback, GEClientCallback, 0))
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{
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FatalError("GEExtensionInit: register client callback failed.\n");
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}
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if((extEntry = AddExtension(GE_NAME,
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GENumberEvents, GENumberErrors,
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ProcGEDispatch, SProcGEDispatch,
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GEResetProc, StandardMinorOpcode)) != 0)
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{
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GEEventBase = extEntry->eventBase;
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GEErrorBase = extEntry->errorBase;
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GEEventType = GEEventBase;
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memset(GEExtensions, 0, sizeof(GEExtensions));
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EventSwapVector[X_GenericEvent] = (EventSwapPtr) SGEGenericEvent;
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} else {
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FatalError("GEInit: AddExtensions failed.\n");
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}
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}
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/************************************************************/
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/* interface for extensions */
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/************************************************************/
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/* Register an extension with GE. The given swap function will be called each
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* time an event is sent to a client with different byte order.
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* @param extension The extensions major opcode
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* @param ev_swap The event swap function.
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* @param ev_fill Called for an event before delivery. The extension now has
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* the chance to fill in necessary fields for the event.
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*/
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void GERegisterExtension(
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int extension,
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void (*ev_swap)(xGenericEvent* from, xGenericEvent* to),
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void (*ev_fill)(xGenericEvent* ev, DeviceIntPtr pDev,
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WindowPtr pWin, GrabPtr pGrab)
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)
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{
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if ((extension & 0x7F) >= MAXEXTENSIONS)
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FatalError("GE: extension > MAXEXTENSIONS. This should not happen.\n");
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/* extension opcodes are > 128, might as well save some space here */
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GEExtensions[extension & 0x7f].evswap = ev_swap;
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GEExtensions[extension & 0x7f].evfill = ev_fill;
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}
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/* Sets type and extension field for a generic event. This is just an
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* auxiliary function, extensions could do it manually too.
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*/
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void GEInitEvent(xGenericEvent* ev, int extension)
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{
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ev->type = GenericEvent;
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ev->extension = extension;
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ev->length = 0;
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}
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/* Recalculates the summary mask for the window. */
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static void
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GERecalculateWinMask(WindowPtr pWin)
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{
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int i;
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GenericMaskPtr it;
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GenericClientMasksPtr evmasks;
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if (!pWin->optional)
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return;
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evmasks = pWin->optional->geMasks;
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for (i = 0; i < MAXEXTENSIONS; i++)
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{
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evmasks->eventMasks[i] = 0;
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}
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it = pWin->optional->geMasks->geClients;
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while(it)
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{
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for (i = 0; i < MAXEXTENSIONS; i++)
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{
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evmasks->eventMasks[i] |= it->eventMask[i];
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}
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it = it->next;
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}
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}
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/* Set generic event mask for given window. */
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void GEWindowSetMask(ClientPtr pClient, WindowPtr pWin, int extension, Mask mask)
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{
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GenericMaskPtr cli;
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extension = (extension & 0x7F);
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if (extension > MAXEXTENSIONS)
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{
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ErrorF("Invalid extension number.\n");
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return;
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}
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if (!pWin->optional && !MakeWindowOptional(pWin))
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{
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ErrorF("GE: Could not make window optional.\n");
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return;
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}
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if (mask)
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{
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GenericClientMasksPtr evmasks = pWin->optional->geMasks;
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/* check for existing client */
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cli = evmasks->geClients;
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while(cli)
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{
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if (cli->client == pClient)
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break;
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cli = cli->next;
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}
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if (!cli)
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{
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/* new client */
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cli = (GenericMaskPtr)xcalloc(1, sizeof(GenericMaskRec));
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if (!cli)
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{
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ErrorF("GE: Insufficient memory to alloc client.\n");
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return;
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}
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cli->next = evmasks->geClients;
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cli->client = pClient;
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evmasks->geClients = cli;
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}
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cli->eventMask[extension] = mask;
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} else
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{
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/* remove client. */
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cli = pWin->optional->geMasks->geClients;
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if (cli->client == pClient)
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{
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pWin->optional->geMasks->geClients = cli->next;
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xfree(cli);
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} else
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{
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GenericMaskPtr prev = cli;
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cli = cli->next;
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while(cli)
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{
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if (cli->client == pClient)
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{
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prev->next = cli->next;
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xfree(cli);
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break;
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}
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prev = cli;
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cli = cli->next;
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}
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}
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if (!cli)
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return;
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}
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GERecalculateWinMask(pWin);
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}
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