-/* xscreensaver, Copyright (c) 1992 Jamie Zawinski <jwz@lucid.com>
+/* xscreensaver, Copyright (c) 1992, 1995, 1997, 1998, 2001, 2002, 2003, 2004
+ * Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
- create a variable `char *progclass' which names this program's
resource class.
- - create a variable `char defaults []' for the default resources.
+ - create a variable `char defaults []' for the default resources, and
+ null-terminate it.
- - create a variable `XrmOptionDescRec options []' for the command-line,
- and `int options_size' which is `XtNumber (options)'.
+ - create a variable `XrmOptionDescRec options[]' for the command-line,
+ and null-terminate it.
And that's it...
*/
-#include "version.h"
-
#include <stdio.h>
#include <X11/Intrinsic.h>
#include <X11/IntrinsicP.h>
#include <X11/CoreP.h>
-#include <X11/Xmu/Error.h>
+#include <X11/Shell.h>
+#include <X11/StringDefs.h>
+#include <X11/Xutil.h>
+#include <X11/keysym.h>
+
+#ifdef __sgi
+# include <X11/SGIScheme.h> /* for SgiUseSchemes() */
+#endif /* __sgi */
+
+#ifdef HAVE_XMU
+# ifndef VMS
+# include <X11/Xmu/Error.h>
+# else /* VMS */
+# include <Xmu/Error.h>
+# endif
+#else
+# include "xmu.h"
+#endif
#include "screenhack.h"
+#include "version.h"
+#include "vroot.h"
+
+#ifndef _XSCREENSAVER_VROOT_H_
+# error Error! You have an old version of vroot.h! Check -I args.
+#endif /* _XSCREENSAVER_VROOT_H_ */
+
+#ifndef isupper
+# define isupper(c) ((c) >= 'A' && (c) <= 'Z')
+#endif
+#ifndef _tolower
+# define _tolower(c) ((c) - 'A' + 'a')
+#endif
+
char *progname;
XrmDatabase db;
+XtAppContext app;
Bool mono_p;
-
static XrmOptionDescRec default_options [] = {
{ "-root", ".root", XrmoptionNoArg, "True" },
{ "-window", ".root", XrmoptionNoArg, "False" },
{ "-mono", ".mono", XrmoptionNoArg, "True" },
- { "-install", ".installColormap", XrmoptionNoArg, "True" }
+ { "-install", ".installColormap", XrmoptionNoArg, "True" },
+ { "-noinstall",".installColormap", XrmoptionNoArg, "False" },
+ { "-visual", ".visualID", XrmoptionSepArg, 0 },
+ { "-window-id", ".windowID", XrmoptionSepArg, 0 },
+ { 0, 0, 0, 0 }
};
static char *default_defaults[] = {
- "*root: false",
- "*geometry: 500x500", /* this should be .geometry, but nooooo... */
+ ".root: false",
+ "*geometry: 600x480", /* this should be .geometry, but nooooo... */
"*mono: false",
"*installColormap: false",
+ "*visualID: default",
+ "*windowID: ",
+ "*desktopGrabber: xscreensaver-getimage %s",
0
};
static char **merged_defaults;
static void
-merge_options ()
+merge_options (void)
{
- int options_sizeof = options_size * sizeof (options[0]);
- int defaults_size;
- merged_options_size = XtNumber (default_options) + options_size;
+ int def_opts_size, opts_size;
+ int def_defaults_size, defaults_size;
+
+ for (def_opts_size = 0; default_options[def_opts_size].option;
+ def_opts_size++)
+ ;
+ for (opts_size = 0; options[opts_size].option; opts_size++)
+ ;
+
+ merged_options_size = def_opts_size + opts_size;
merged_options = (XrmOptionDescRec *)
- malloc (sizeof (default_options) + options_sizeof);
- memcpy (merged_options, options, options_sizeof);
- memcpy (merged_options + options_size, default_options,
- sizeof (default_options));
+ malloc ((merged_options_size + 1) * sizeof(*default_options));
+ memcpy (merged_options, default_options,
+ (def_opts_size * sizeof(*default_options)));
+ memcpy (merged_options + def_opts_size, options,
+ ((opts_size + 1) * sizeof(*default_options)));
- for (defaults_size = 0; defaults [defaults_size]; defaults_size++);
+ for (def_defaults_size = 0; default_defaults[def_defaults_size];
+ def_defaults_size++)
+ ;
+ for (defaults_size = 0; defaults[defaults_size]; defaults_size++)
+ ;
merged_defaults = (char **)
- malloc (sizeof (default_defaults) + (defaults_size * sizeof (char *)));
- memcpy (merged_defaults, default_defaults, sizeof (default_defaults));
- memcpy ((merged_defaults - 1 +
- (sizeof (default_defaults) / sizeof (default_defaults[0]))),
- defaults, ((defaults_size + 1) * sizeof (defaults[0])));
+ malloc ((def_defaults_size + defaults_size + 1) * sizeof (*defaults));;
+ memcpy (merged_defaults, default_defaults,
+ def_defaults_size * sizeof(*defaults));
+ memcpy (merged_defaults + def_defaults_size, defaults,
+ (defaults_size + 1) * sizeof(*defaults));
+
+ /* This totally sucks. Xt should behave like this by default.
+ If the string in `defaults' looks like ".foo", change that
+ to "Progclass.foo".
+ */
+ {
+ char **s;
+ for (s = merged_defaults; *s; s++)
+ if (**s == '.')
+ {
+ const char *oldr = *s;
+ char *newr = (char *) malloc(strlen(oldr) + strlen(progclass) + 3);
+ strcpy (newr, progclass);
+ strcat (newr, oldr);
+ *s = newr;
+ }
+ }
}
\f
*/
static int
-screenhack_ehandler (dpy, error)
- Display *dpy;
- XErrorEvent *error;
+screenhack_ehandler (Display *dpy, XErrorEvent *error)
{
fprintf (stderr, "\nX error in %s:\n", progname);
if (XmuPrintDefaultErrorMessage (dpy, error, stderr))
}
static Bool
-MapNotify_event_p (dpy, event, window)
- Display *dpy;
- XEvent *event;
- XPointer window;
+MapNotify_event_p (Display *dpy, XEvent *event, XPointer window)
{
return (event->xany.type == MapNotify &&
event->xvisibility.window == (Window) window);
}
+#ifdef XLOCKMORE
+extern void pre_merge_options (void);
+#endif
+
+
+static Atom XA_WM_PROTOCOLS, XA_WM_DELETE_WINDOW;
+
+/* Dead-trivial event handling: exits if "q" or "ESC" are typed.
+ Exit if the WM_PROTOCOLS WM_DELETE_WINDOW ClientMessage is received.
+ */
+void
+screenhack_handle_event (Display *dpy, XEvent *event)
+{
+ if (XtAppPending (app) & (XtIMTimer|XtIMAlternateInput))
+ XtAppProcessEvent (app, XtIMTimer|XtIMAlternateInput);
+
+ switch (event->xany.type)
+ {
+ case KeyPress:
+ {
+ KeySym keysym;
+ char c = 0;
+ XLookupString (&event->xkey, &c, 1, &keysym, 0);
+ if (c == 'q' ||
+ c == 'Q' ||
+ c == 3 || /* ^C */
+ c == 27) /* ESC */
+ exit (0);
+ else if (! (keysym >= XK_Shift_L && keysym <= XK_Hyper_R))
+ XBell (dpy, 0); /* beep for non-chord keys */
+ }
+ break;
+ case ButtonPress:
+ XBell (dpy, 0);
+ break;
+ case ClientMessage:
+ {
+ if (event->xclient.message_type != XA_WM_PROTOCOLS)
+ {
+ char *s = XGetAtomName(dpy, event->xclient.message_type);
+ if (!s) s = "(null)";
+ fprintf (stderr, "%s: unknown ClientMessage %s received!\n",
+ progname, s);
+ }
+ else if (event->xclient.data.l[0] != XA_WM_DELETE_WINDOW)
+ {
+ char *s1 = XGetAtomName(dpy, event->xclient.message_type);
+ char *s2 = XGetAtomName(dpy, event->xclient.data.l[0]);
+ if (!s1) s1 = "(null)";
+ if (!s2) s2 = "(null)";
+ fprintf (stderr, "%s: unknown ClientMessage %s[%s] received!\n",
+ progname, s1, s2);
+ }
+ else
+ {
+ exit (0);
+ }
+ }
+ break;
+ }
+}
+
+
void
-main (argc, argv)
- int argc;
- char **argv;
+screenhack_handle_events (Display *dpy)
+{
+ while (XPending (dpy))
+ {
+ XEvent event;
+ XNextEvent (dpy, &event);
+ screenhack_handle_event (dpy, &event);
+ }
+}
+
+
+static Visual *
+pick_visual (Screen *screen)
+{
+#ifdef USE_GL
+ /* If we're linking against GL (that is, this is the version of screenhack.o
+ that the GL hacks will use, which is different from the one that the
+ non-GL hacks will use) then try to pick the "best" visual by interrogating
+ the GL library instead of by asking Xlib. GL knows better.
+ */
+ Visual *v = 0;
+ char *string = get_string_resource ("visualID", "VisualID");
+ char *s;
+
+ if (string)
+ for (s = string; *s; s++)
+ if (isupper (*s)) *s = _tolower (*s);
+
+ if (!string || !*string ||
+ !strcmp (string, "gl") ||
+ !strcmp (string, "best") ||
+ !strcmp (string, "color") ||
+ !strcmp (string, "default"))
+ v = get_gl_visual (screen); /* from ../utils/visual-gl.c */
+
+ if (string)
+ free (string);
+ if (v)
+ return v;
+#endif /* USE_GL */
+
+ return get_visual_resource (screen, "visualID", "VisualID", False);
+}
+
+
+/* Notice when the user has requested a different visual or colormap
+ on a pre-existing window (e.g., "-root -visual truecolor" or
+ "-window-id 0x2c00001 -install") and complain, since when drawing
+ on an existing window, we have no choice about these things.
+ */
+static void
+visual_warning (Screen *screen, Window window, Visual *visual, Colormap cmap,
+ Bool window_p)
+{
+ char *visual_string = get_string_resource ("visualID", "VisualID");
+ Visual *desired_visual = pick_visual (screen);
+ char win[100];
+ char why[100];
+
+ if (window == RootWindowOfScreen (screen))
+ strcpy (win, "root window");
+ else
+ sprintf (win, "window 0x%lx", (unsigned long) window);
+
+ if (window_p)
+ sprintf (why, "-window-id 0x%lx", (unsigned long) window);
+ else
+ strcpy (why, "-root");
+
+ if (visual_string && *visual_string)
+ {
+ char *s;
+ for (s = visual_string; *s; s++)
+ if (isupper (*s)) *s = _tolower (*s);
+
+ if (!strcmp (visual_string, "default") ||
+ !strcmp (visual_string, "default") ||
+ !strcmp (visual_string, "best"))
+ /* don't warn about these, just silently DWIM. */
+ ;
+ else if (visual != desired_visual)
+ {
+ fprintf (stderr, "%s: ignoring `-visual %s' because of `%s'.\n",
+ progname, visual_string, why);
+ fprintf (stderr, "%s: using %s's visual 0x%lx.\n",
+ progname, win, XVisualIDFromVisual (visual));
+ }
+ free (visual_string);
+ }
+
+ if (visual == DefaultVisualOfScreen (screen) &&
+ has_writable_cells (screen, visual) &&
+ get_boolean_resource ("installColormap", "InstallColormap"))
+ {
+ fprintf (stderr, "%s: ignoring `-install' because of `%s'.\n",
+ progname, why);
+ fprintf (stderr, "%s: using %s's colormap 0x%lx.\n",
+ progname, win, (unsigned long) cmap);
+ }
+
+# ifdef USE_GL
+ if (!validate_gl_visual (stderr, screen, win, visual))
+ exit (1);
+# endif /* USE_GL */
+}
+
+
+static void
+fix_fds (void)
+{
+ /* Bad Things Happen if stdin, stdout, and stderr have been closed
+ (as by the `sh incantation "attraction >&- 2>&-"). When you do
+ that, the X connection gets allocated to one of these fds, and
+ then some random library writes to stderr, and random bits get
+ stuffed down the X pipe, causing "Xlib: sequence lost" errors.
+ So, we cause the first three file descriptors to be open to
+ /dev/null if they aren't open to something else already. This
+ must be done before any other files are opened (or the closing
+ of that other file will again free up one of the "magic" first
+ three FDs.)
+
+ We do this by opening /dev/null three times, and then closing
+ those fds, *unless* any of them got allocated as #0, #1, or #2,
+ in which case we leave them open. Gag.
+
+ Really, this crap is technically required of *every* X program,
+ if you want it to be robust in the face of "2>&-".
+ */
+ int fd0 = open ("/dev/null", O_RDWR);
+ int fd1 = open ("/dev/null", O_RDWR);
+ int fd2 = open ("/dev/null", O_RDWR);
+ if (fd0 > 2) close (fd0);
+ if (fd1 > 2) close (fd1);
+ if (fd2 > 2) close (fd2);
+}
+
+
+int
+main (int argc, char **argv)
{
- XtAppContext app;
Widget toplevel;
Display *dpy;
Window window;
+ Screen *screen;
+ Visual *visual;
Colormap cmap;
Bool root_p;
+ Window on_window = 0;
XEvent event;
+ Boolean dont_clear /*, dont_map */;
+ char version[255];
+
+ fix_fds();
+#ifdef XLOCKMORE
+ pre_merge_options ();
+#endif
merge_options ();
+
+#ifdef __sgi
+ /* We have to do this on SGI to prevent the background color from being
+ overridden by the current desktop color scheme (we'd like our backgrounds
+ to be black, thanks.) This should be the same as setting the
+ "*useSchemes: none" resource, but it's not -- if that resource is
+ present in the `default_defaults' above, it doesn't work, though it
+ does work when passed as an -xrm arg on the command line. So screw it,
+ turn them off from C instead.
+ */
+ SgiUseSchemes ("none");
+#endif /* __sgi */
+
toplevel = XtAppInitialize (&app, progclass, merged_options,
merged_options_size, &argc, argv,
merged_defaults, 0, 0);
dpy = XtDisplay (toplevel);
+ screen = XtScreen (toplevel);
db = XtDatabase (dpy);
+
XtGetApplicationNameAndClass (dpy, &progname, &progclass);
+
+ /* half-assed way of avoiding buffer-overrun attacks. */
+ if (strlen (progname) >= 100) progname[100] = 0;
+
XSetErrorHandler (screenhack_ehandler);
+
+ XA_WM_PROTOCOLS = XInternAtom (dpy, "WM_PROTOCOLS", False);
+ XA_WM_DELETE_WINDOW = XInternAtom (dpy, "WM_DELETE_WINDOW", False);
+
+ {
+ char *v = (char *) strdup(strchr(screensaver_id, ' '));
+ char *s1, *s2, *s3, *s4;
+ s1 = (char *) strchr(v, ' '); s1++;
+ s2 = (char *) strchr(s1, ' ');
+ s3 = (char *) strchr(v, '('); s3++;
+ s4 = (char *) strchr(s3, ')');
+ *s2 = 0;
+ *s4 = 0;
+ sprintf (version, "%s: from the XScreenSaver %s distribution (%s.)",
+ progclass, s1, s3);
+ free(v);
+ }
+
if (argc > 1)
{
+ const char *s;
int i;
int x = 18;
int end = 78;
- fprintf (stderr, "%s: unrecognised option \"%s\"\n", progname, argv[1]);
+ Bool help_p = (!strcmp(argv[1], "-help") ||
+ !strcmp(argv[1], "--help"));
+ fprintf (stderr, "%s\n", version);
+ for (s = progclass; *s; s++) fprintf(stderr, " ");
+ fprintf (stderr, " http://www.jwz.org/xscreensaver/\n\n");
+
+ if (!help_p)
+ fprintf(stderr, "Unrecognised option: %s\n", argv[1]);
fprintf (stderr, "Options include: ");
for (i = 0; i < merged_options_size; i++)
{
if (argp) fprintf (stderr, " <arg>");
if (i != merged_options_size - 1) fprintf (stderr, ", ");
}
+
fprintf (stderr, ".\n");
- exit (1);
+
+#if 0
+ if (help_p)
+ {
+ fprintf (stderr, "\nResources:\n\n");
+ for (i = 0; i < merged_options_size; i++)
+ {
+ const char *opt = merged_options [i].option;
+ const char *res = merged_options [i].specifier + 1;
+ const char *val = merged_options [i].value;
+ char *s = get_string_resource ((char *) res, (char *) res);
+
+ if (s)
+ {
+ int L = strlen(s);
+ while (L > 0 && (s[L-1] == ' ' || s[L-1] == '\t'))
+ s[--L] = 0;
+ }
+
+ fprintf (stderr, " %-16s %-18s ", opt, res);
+ if (merged_options [i].argKind == XrmoptionSepArg)
+ {
+ fprintf (stderr, "[%s]", (s ? s : "?"));
+ }
+ else
+ {
+ fprintf (stderr, "%s", (val ? val : "(null)"));
+ if (val && s && !strcasecmp (val, s))
+ fprintf (stderr, " [default]");
+ }
+ fprintf (stderr, "\n");
+ }
+ fprintf (stderr, "\n");
+ }
+#endif
+
+ exit (help_p ? 0 : 1);
}
+ dont_clear = get_boolean_resource ("dontClearRoot", "Boolean");
+/*dont_map = get_boolean_resource ("dontMapWindow", "Boolean"); */
mono_p = get_boolean_resource ("mono", "Boolean");
if (CellsOfScreen (DefaultScreenOfDisplay (dpy)) <= 2)
mono_p = True;
root_p = get_boolean_resource ("root", "Boolean");
- if (root_p)
+
+ {
+ char *s = get_string_resource ("windowID", "WindowID");
+ if (s && *s)
+ on_window = get_integer_resource ("windowID", "WindowID");
+ if (s) free (s);
+ }
+
+ if (on_window)
{
XWindowAttributes xgwa;
- window = RootWindowOfScreen (XtScreen (toplevel));
+ window = (Window) on_window;
XtDestroyWidget (toplevel);
XGetWindowAttributes (dpy, window, &xgwa);
cmap = xgwa.colormap;
+ visual = xgwa.visual;
+ screen = xgwa.screen;
+ visual_warning (screen, window, visual, cmap, True);
+
+ /* Select KeyPress and resize events on the external window.
+ */
+ xgwa.your_event_mask |= KeyPressMask | StructureNotifyMask;
+ XSelectInput (dpy, window, xgwa.your_event_mask);
+
+ /* Select ButtonPress and ButtonRelease events on the external window,
+ if no other app has already selected them (only one app can select
+ ButtonPress at a time: BadAccess results.)
+ */
+ if (! (xgwa.all_event_masks & (ButtonPressMask | ButtonReleaseMask)))
+ XSelectInput (dpy, window,
+ (xgwa.your_event_mask |
+ ButtonPressMask | ButtonReleaseMask));
+ }
+ else if (root_p)
+ {
+ XWindowAttributes xgwa;
+ window = VirtualRootWindowOfScreen (XtScreen (toplevel));
+ XtDestroyWidget (toplevel);
+ XGetWindowAttributes (dpy, window, &xgwa);
+ cmap = xgwa.colormap;
+ visual = xgwa.visual;
+ visual_warning (screen, window, visual, cmap, False);
}
else
{
- XtRealizeWidget (toplevel);
- window = XtWindow (toplevel);
- if (get_boolean_resource ("installColormap", "InstallColormap"))
+ Boolean def_visual_p;
+ visual = pick_visual (screen);
+
+# ifdef USE_GL
+ if (!validate_gl_visual (stderr, screen, "window", visual))
+ exit (1);
+# endif /* USE_GL */
+
+ if (toplevel->core.width <= 0)
+ toplevel->core.width = 600;
+ if (toplevel->core.height <= 0)
+ toplevel->core.height = 480;
+
+ def_visual_p = (visual == DefaultVisualOfScreen (screen));
+
+ if (!def_visual_p)
+ {
+ unsigned int bg, bd;
+ Widget new;
+
+ cmap = XCreateColormap (dpy, VirtualRootWindowOfScreen(screen),
+ visual, AllocNone);
+ bg = get_pixel_resource ("background", "Background", dpy, cmap);
+ bd = get_pixel_resource ("borderColor", "Foreground", dpy, cmap);
+
+ new = XtVaAppCreateShell (progname, progclass,
+ topLevelShellWidgetClass, dpy,
+ XtNmappedWhenManaged, False,
+ XtNvisual, visual,
+ XtNdepth, visual_depth (screen, visual),
+ XtNwidth, toplevel->core.width,
+ XtNheight, toplevel->core.height,
+ XtNcolormap, cmap,
+ XtNbackground, (Pixel) bg,
+ XtNborderColor, (Pixel) bd,
+ XtNinput, True, /* for WM_HINTS */
+ NULL);
+ XtDestroyWidget (toplevel);
+ toplevel = new;
+ XtRealizeWidget (toplevel);
+ window = XtWindow (toplevel);
+ }
+ else
+ {
+ XtVaSetValues (toplevel,
+ XtNmappedWhenManaged, False,
+ XtNinput, True, /* for WM_HINTS */
+ NULL);
+ XtRealizeWidget (toplevel);
+ window = XtWindow (toplevel);
+
+ if (get_boolean_resource ("installColormap", "InstallColormap"))
+ {
+ cmap = XCreateColormap (dpy, window,
+ DefaultVisualOfScreen (XtScreen (toplevel)),
+ AllocNone);
+ XSetWindowColormap (dpy, window, cmap);
+ }
+ else
+ {
+ cmap = DefaultColormap (dpy, DefaultScreen (dpy));
+ }
+ }
+
+/*
+ if (dont_map)
{
- cmap = XCreateColormap (dpy, window,
- DefaultVisualOfScreen (XtScreen (toplevel)),
- AllocNone);
- XSetWindowColormap (dpy, window, cmap);
+ XtVaSetValues (toplevel, XtNmappedWhenManaged, False, NULL);
+ XtRealizeWidget (toplevel);
}
else
- cmap = DefaultColormap (dpy, DefaultScreen (dpy));
+*/
+ {
+ XtPopup (toplevel, XtGrabNone);
+ }
+
+ XtVaSetValues(toplevel, XtNtitle, version, NULL);
+
+ /* For screenhack_handle_events(): select KeyPress, and
+ announce that we accept WM_DELETE_WINDOW. */
+ {
+ XWindowAttributes xgwa;
+ XGetWindowAttributes (dpy, window, &xgwa);
+ XSelectInput (dpy, window,
+ (xgwa.your_event_mask | KeyPressMask |
+ ButtonPressMask | ButtonReleaseMask));
+ XChangeProperty (dpy, window, XA_WM_PROTOCOLS, XA_ATOM, 32,
+ PropModeReplace,
+ (unsigned char *) &XA_WM_DELETE_WINDOW, 1);
+ }
}
- if (!get_boolean_resource ("dontClearWindow", "Boolean")) /* kludge-o-rama */
+
+ if (!dont_clear)
{
XSetWindowBackground (dpy, window,
get_pixel_resource ("background", "Background",
XClearWindow (dpy, window);
}
- if (!root_p && toplevel->core.mapped_when_managed)
+ if (!root_p && !on_window)
/* wait for it to be mapped */
XIfEvent (dpy, &event, MapNotify_event_p, (XPointer) window);
XSync (dpy, False);
- srandom ((int) time ((time_t *) 0));
- screenhack (dpy, window);
+
+ /* This is the one and only place that the random-number generator is
+ seeded in any screenhack. You do not need to seed the RNG again,
+ it is done for you before your code is invoked. */
+# undef ya_rand_init
+ ya_rand_init (0);
+
+ screenhack (dpy, window); /* doesn't return */
+ return 0;
}
projects / xscreensaver / blobdiff