2  * Copyright 2002-2003 Red Hat Inc., Durham, North Carolina.
21  * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
36  * It is possible for one of the DMX "backend displays" to actually be
37  * smaller than the dimensions of the backend X server.  Therefore, it
38  * is possible for more than one of the DMX "backend displays" to be
39  * physically located on the same backend X server.  This situation must
43  * We could analyze the names used for the DMX "backend displays" (e.g.,
44  * the names passed to the -display command-line parameter), but there
45  * are many possible names for a single X display, and failing to detect
47  * DMX server opens a window on a backend X server, a property value is
48  * queried and set on that backend to detect when another window is
52  * both have windows on the same physical backend X server.  This case
54  * particular backend X server.
59 #include <dmx-config.h>
67 /** Holds the window id of all DMX windows on the backend X server. */
73 extern char *display;
76 dmxPropertyErrorHandler(Display * dpy, XErrorEvent * ev)  in dmxPropertyErrorHandler()
85      * length-limited calls. */  in dmxPropertyIdentifier()
94     snprintf(buf, sizeof(buf), "%s:%s:%s", DMX_IDENT, hostname, display);  in dmxPropertyIdentifier()
101  * only DMX window on the backend X server.) */
109     if (!start->next) {  in dmxPropertyIterate()
110         if (!start->beDisplay)  in dmxPropertyIterate()
115     for (pt = start->next; /* condition at end of loop */ ; pt = pt->next) {  in dmxPropertyIterate()
120         dmxLog(dmxDebug, "pt->beDisplay = %p\n", pt->beDisplay);  in dmxPropertyIterate()
121         if (pt->beDisplay && (retval = f(pt, closure)))  in dmxPropertyIterate()
129 /** Returns 0 if this is the only Xdmx session on the display; 1
134     Display *dpy = dmxScreen->beDisplay;  in dmxPropertyCheckOtherServers()
142     int (*dmxOldHandler) (Display *, XErrorEvent *);  in dmxPropertyCheckOtherServers()
173                                         tp.value, dmxScreen->name);  in dmxPropertyCheckOtherServers()
175                     list[count - 1] = malloc(tp.nitems + 2);  in dmxPropertyCheckOtherServers()
176                     strncpy(list[count - 1], (char *) tp.value, tp.nitems + 1);  in dmxPropertyCheckOtherServers()
189         dmxLogOutput(dmxScreen, "No Xdmx server running on backend\n");  in dmxPropertyCheckOtherServers()
193 /** Returns NULL if this is the only Xdmx window on the display.
195  * the display. */
199     Display *dpy = dmxScreen->beDisplay;  in dmxPropertyCheckOtherWindows()
204     int (*dmxOldHandler) (Display *, XErrorEvent *);  in dmxPropertyCheckOtherWindows()
223                        dmxScreen->name, (unsigned long) win, tp.value);  in dmxPropertyCheckOtherWindows()
247 /** Returns 0 if this is the only Xdmx session on the display; 1
254     Display *dpy = dmxScreen->beDisplay;  in dmxPropertyDisplay()
261         dmxScreen->shared = 1;  in dmxPropertyDisplay()
269 /** Returns 1 if the dmxScreen and the display in \a name are on the
270  * same display, or 0 otherwise.  We can't just compare the display
271  * names because there can be multiple synonyms for the same display,
272  * some of which cannot be determined without accessing the display
277     Display *dpy0 = dmxScreen->beDisplay;  in dmxPropertySameDisplay()
280     Display *dpy1 = NULL;  in dmxPropertySameDisplay()
292         dmxLog(dmxWarning, "No atom on %s\n", dmxScreen->name);  in dmxPropertySameDisplay()
297         dmxLog(dmxWarning, "No text property on %s\n", dmxScreen->name);  in dmxPropertySameDisplay()
328 /** Prints a log message if \a dmxScreen is on the same backend X server
329  * as some other DMX backend (output) screen.  Modifies the property
330  * (#DMX_ATOMNAME) on the backend X server to reflect the creation of \a
333  * The root window of the backend X server holds a list of window ids
339  * "#DMX_IDENT:<hostname running DMX>:<display name of DMX>,<screen number>"
346     Display *dpy = dmxScreen->beDisplay;  in dmxPropertyWindow()
347     Window win = dmxScreen->scrnWin;  in dmxPropertyWindow()
358         DMXScreenInfo *tmp = dmxScreen->next;  in dmxPropertyWindow()
360         dmxScreen->next = (other->next ? other->next : other);  in dmxPropertyWindow()
361         other->next = (tmp ? tmp : dmxScreen);  in dmxPropertyWindow()
362         dmxLog(dmxDebug, "%d/%s/%lu and %d/%s/%lu are on the same backend\n",  in dmxPropertyWindow()
363                dmxScreen->index, dmxScreen->name, (unsigned long) dmxScreen->scrnWin,  in dmxPropertyWindow()
364                other->index, other->name, (unsigned long) other->scrnWin);  in dmxPropertyWindow()
367     snprintf(buf, sizeof(buf), ".%d,%lu", dmxScreen->index,  in dmxPropertyWindow()
372     snprintf(buf, sizeof(buf), "%s,%d", id, dmxScreen->index);  in dmxPropertyWindow()