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-rw-r--r--src/Xfixes.c330
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diff --git a/src/Xfixes.c b/src/Xfixes.c
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+/*
+ * $XFree86: xc/lib/Xfixes/Xfixes.c,v 1.1 2002/11/30 06:21:45 keithp Exp $
+ *
+ * Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc.
+ *
+ * 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 Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Keith Packard makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD 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 "Xfixesint.h"
+
+XFixesExtInfo XFixesExtensionInfo;
+char XFixesExtensionName[] = XFIXES_NAME;
+
+static int
+XFixesCloseDisplay (Display *dpy, XExtCodes *codes);
+
+static Bool
+XFixesWireToEvent(Display *dpy, XEvent *event, xEvent *wire);
+
+static Status
+XFixesEventToWire(Display *dpy, XEvent *event, xEvent *wire);
+
+/*
+ * XFixesExtAddDisplay - add a display to this extension. (Replaces
+ * XextAddDisplay)
+ */
+static XFixesExtDisplayInfo *
+XFixesExtAddDisplay (XFixesExtInfo *extinfo,
+ Display *dpy,
+ char *ext_name)
+{
+ XFixesExtDisplayInfo *info;
+ int ev;
+
+ info = (XFixesExtDisplayInfo *) Xmalloc (sizeof (XFixesExtDisplayInfo));
+ if (!info) return NULL;
+ info->display = dpy;
+
+ info->codes = XInitExtension (dpy, ext_name);
+
+ /*
+ * if the server has the extension, then we can initialize the
+ * appropriate function vectors
+ */
+ if (info->codes) {
+ xXFixesQueryVersionReply rep;
+ xXFixesQueryVersionReq *req;
+ XESetCloseDisplay (dpy, info->codes->extension,
+ XFixesCloseDisplay);
+ for (ev = info->codes->first_event;
+ ev < info->codes->first_event + XFixesNumberEvents;
+ ev++)
+ {
+ XESetWireToEvent (dpy, ev, XFixesWireToEvent);
+ XESetEventToWire (dpy, ev, XFixesEventToWire);
+ }
+ /*
+ * Get the version info
+ */
+ LockDisplay (dpy);
+ GetReq (XFixesQueryVersion, req);
+ req->reqType = info->codes->major_opcode;
+ req->xfixesReqType = X_XFixesQueryVersion;
+ req->majorVersion = XFIXES_MAJOR;
+ req->minorVersion = XFIXES_MINOR;
+ if (!_XReply (dpy, (xReply *) &rep, 0, xTrue))
+ {
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ return 0;
+ }
+ info->major_version = rep.majorVersion;
+ info->minor_version = rep.minorVersion;
+ UnlockDisplay (dpy);
+ } else {
+ /* The server doesn't have this extension.
+ * Use a private Xlib-internal extension to hang the close_display
+ * hook on so that the "cache" (extinfo->cur) is properly cleaned.
+ * (XBUG 7955)
+ */
+ XExtCodes *codes = XAddExtension(dpy);
+ if (!codes) {
+ XFree(info);
+ return NULL;
+ }
+ XESetCloseDisplay (dpy, codes->extension, XFixesCloseDisplay);
+ }
+
+ /*
+ * now, chain it onto the list
+ */
+ _XLockMutex(_Xglobal_lock);
+ info->next = extinfo->head;
+ extinfo->head = info;
+ extinfo->cur = info;
+ extinfo->ndisplays++;
+ _XUnlockMutex(_Xglobal_lock);
+ return info;
+}
+
+
+/*
+ * XFixesExtRemoveDisplay - remove the indicated display from the
+ * extension object. (Replaces XextRemoveDisplay.)
+ */
+static int
+XFixesExtRemoveDisplay (XFixesExtInfo *extinfo, Display *dpy)
+{
+ XFixesExtDisplayInfo *info, *prev;
+
+ /*
+ * locate this display and its back link so that it can be removed
+ */
+ _XLockMutex(_Xglobal_lock);
+ prev = NULL;
+ for (info = extinfo->head; info; info = info->next) {
+ if (info->display == dpy) break;
+ prev = info;
+ }
+ if (!info) {
+ _XUnlockMutex(_Xglobal_lock);
+ return 0; /* hmm, actually an error */
+ }
+
+ /*
+ * remove the display from the list; handles going to zero
+ */
+ if (prev)
+ prev->next = info->next;
+ else
+ extinfo->head = info->next;
+
+ extinfo->ndisplays--;
+ if (info == extinfo->cur) extinfo->cur = NULL; /* flush cache */
+ _XUnlockMutex(_Xglobal_lock);
+
+ Xfree ((char *) info);
+ return 1;
+}
+
+/*
+ * XFixesExtFindDisplay - look for a display in this extension; keeps a
+ * cache of the most-recently used for efficiency. (Replaces
+ * XextFindDisplay.)
+ */
+static XFixesExtDisplayInfo *
+XFixesExtFindDisplay (XFixesExtInfo *extinfo,
+ Display *dpy)
+{
+ XFixesExtDisplayInfo *info;
+
+ /*
+ * see if this was the most recently accessed display
+ */
+ if ((info = extinfo->cur) && info->display == dpy)
+ return info;
+
+ /*
+ * look for display in list
+ */
+ _XLockMutex(_Xglobal_lock);
+ for (info = extinfo->head; info; info = info->next) {
+ if (info->display == dpy) {
+ extinfo->cur = info; /* cache most recently used */
+ _XUnlockMutex(_Xglobal_lock);
+ return info;
+ }
+ }
+ _XUnlockMutex(_Xglobal_lock);
+
+ return NULL;
+}
+
+XFixesExtDisplayInfo *
+XFixesFindDisplay (Display *dpy)
+{
+ XFixesExtDisplayInfo *info;
+
+ info = XFixesExtFindDisplay (&XFixesExtensionInfo, dpy);
+ if (!info)
+ info = XFixesExtAddDisplay (&XFixesExtensionInfo, dpy,
+ XFixesExtensionName);
+ return info;
+}
+
+static int
+XFixesCloseDisplay (Display *dpy, XExtCodes *codes)
+{
+ return XFixesExtRemoveDisplay (&XFixesExtensionInfo, dpy);
+}
+
+static Bool
+XFixesWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
+{
+ XFixesExtDisplayInfo *info = XFixesFindDisplay(dpy);
+
+ XFixesCheckExtension(dpy, info, False);
+
+ switch ((wire->u.u.type & 0x7F) - info->codes->first_event)
+ {
+ case XFixesSelectionNotify: {
+ XFixesSelectionNotifyEvent *aevent;
+ xXFixesSelectionNotifyEvent *awire;
+ awire = (xXFixesSelectionNotifyEvent *) wire;
+ aevent = (XFixesSelectionNotifyEvent *) event;
+ aevent->type = awire->type & 0x7F;
+ aevent->subtype = awire->subtype;
+ aevent->serial = _XSetLastRequestRead(dpy,
+ (xGenericReply *) wire);
+ aevent->send_event = (awire->type & 0x80) != 0;
+ aevent->display = dpy;
+ aevent->window = awire->window;
+ aevent->owner = awire->owner;
+ aevent->selection = awire->selection;
+ aevent->timestamp = awire->timestamp;
+ aevent->selection_timestamp = awire->selectionTimestamp;
+ return True;
+ }
+ case XFixesCursorNotify: {
+ XFixesCursorNotifyEvent *aevent;
+ xXFixesCursorNotifyEvent *awire;
+ awire = (xXFixesCursorNotifyEvent *) wire;
+ aevent = (XFixesCursorNotifyEvent *) event;
+ aevent->type = awire->type & 0x7F;
+ aevent->subtype = awire->subtype;
+ aevent->serial = _XSetLastRequestRead(dpy,
+ (xGenericReply *) wire);
+ aevent->send_event = (awire->type & 0x80) != 0;
+ aevent->display = dpy;
+ aevent->window = awire->window;
+ aevent->cursor_serial = awire->cursorSerial;
+ aevent->timestamp = awire->timestamp;
+ aevent->cursor_name = awire->name;
+ return True;
+ }
+ }
+ return False;
+}
+
+static Status
+XFixesEventToWire(Display *dpy, XEvent *event, xEvent *wire)
+{
+ XFixesExtDisplayInfo *info = XFixesFindDisplay(dpy);
+
+ XFixesCheckExtension(dpy, info, False);
+
+ switch ((event->type & 0x7F) - info->codes->first_event)
+ {
+ case XFixesSelectionNotify: {
+ XFixesSelectionNotifyEvent *aevent;
+ xXFixesSelectionNotifyEvent *awire;
+ awire = (xXFixesSelectionNotifyEvent *) wire;
+ aevent = (XFixesSelectionNotifyEvent *) event;
+ awire->type = aevent->type | (aevent->send_event ? 0x80 : 0);
+ awire->subtype = aevent->subtype;
+ awire->window = aevent->window;
+ awire->owner = aevent->owner;
+ awire->selection = aevent->selection;
+ awire->timestamp = aevent->timestamp;
+ awire->selectionTimestamp = aevent->selection_timestamp;
+ return True;
+ }
+ case XFixesCursorNotify: {
+ XFixesCursorNotifyEvent *aevent;
+ xXFixesCursorNotifyEvent *awire;
+ awire = (xXFixesCursorNotifyEvent *) wire;
+ aevent = (XFixesCursorNotifyEvent *) event;
+ awire->type = aevent->type | (aevent->send_event ? 0x80 : 0);
+ awire->subtype = aevent->subtype;
+ awire->window = aevent->window;
+ awire->timestamp = aevent->timestamp;
+ awire->cursorSerial = aevent->cursor_serial;
+ awire->name = aevent->cursor_name;
+ }
+ }
+ return False;
+}
+
+Bool
+XFixesQueryExtension (Display *dpy, int *event_basep, int *error_basep)
+{
+ XFixesExtDisplayInfo *info = XFixesFindDisplay (dpy);
+
+ if (XFixesHasExtension(info))
+ {
+ *event_basep = info->codes->first_event;
+ *error_basep = info->codes->first_error;
+ return True;
+ }
+ else
+ return False;
+}
+
+Status
+XFixesQueryVersion (Display *dpy,
+ int *major_versionp,
+ int *minor_versionp)
+{
+ XFixesExtDisplayInfo *info = XFixesFindDisplay (dpy);
+
+ XFixesCheckExtension (dpy, info, 0);
+
+ *major_versionp = info->major_version;
+ *minor_versionp = info->minor_version;
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ return 1;
+}
+
+int
+XFixesVersion (void)
+{
+ return XFIXES_VERSION;
+}
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