X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=driver%2Fwindows.c;h=8598e7e0f1ab05cfe4aae2afe3b0cb59aa9d44ab;hb=8eb2873d7054e705c4e83f22d18c40946a9e2529;hp=b092a72b62d82baae3231b3155d61019a8bc8a51;hpb=14627f4038ada5d11456f3770090f3c39740d70f;p=xscreensaver diff --git a/driver/windows.c b/driver/windows.c index b092a72b..8598e7e0 100644 --- a/driver/windows.c +++ b/driver/windows.c @@ -1,5 +1,5 @@ /* windows.c --- turning the screen black; dealing with visuals, virtual roots. - * xscreensaver, Copyright (c) 1991-2000 Jamie Zawinski + * xscreensaver, Copyright (c) 1991-2001 Jamie Zawinski * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that @@ -45,6 +45,10 @@ # include #endif /* HAVE_XF86VMODE */ +#ifdef HAVE_XINERAMA +# include +#endif /* HAVE_XINERAMA */ + /* This file doesn't need the Xt headers, so stub these types out... */ #undef XtPointer @@ -68,6 +72,8 @@ Atom XA_SCREENSAVER_STATUS; extern saver_info *global_si_kludge; /* I hate C so much... */ +static void maybe_transfer_grabs (saver_screen_info *ssi, + Window old_w, Window new_w, int new_screen); #define ALL_POINTER_EVENTS \ (ButtonPressMask | ButtonReleaseMask | EnterWindowMask | \ @@ -96,7 +102,7 @@ grab_string(int status) } static int -grab_kbd(saver_info *si, Window w) +grab_kbd(saver_info *si, Window w, int screen_no) { saver_preferences *p = &si->prefs; int status = XGrabKeyboard (si->dpy, w, True, @@ -105,28 +111,34 @@ grab_kbd(saver_info *si, Window w) GrabModeSync, GrabModeAsync, CurrentTime); if (status == GrabSuccess) - si->keyboard_grab_window = w; + { + si->keyboard_grab_window = w; + si->keyboard_grab_screen = screen_no; + } if (p->verbose_p) - fprintf(stderr, "%s: grabbing keyboard on 0x%x... %s.\n", - blurb(), (unsigned long) w, grab_string(status)); + fprintf(stderr, "%s: %d: grabbing keyboard on 0x%x... %s.\n", + blurb(), screen_no, (unsigned long) w, grab_string(status)); return status; } static int -grab_mouse (saver_info *si, Window w, Cursor cursor) +grab_mouse (saver_info *si, Window w, Cursor cursor, int screen_no) { saver_preferences *p = &si->prefs; int status = XGrabPointer (si->dpy, w, True, ALL_POINTER_EVENTS, GrabModeAsync, GrabModeAsync, w, cursor, CurrentTime); if (status == GrabSuccess) - si->mouse_grab_window = w; + { + si->mouse_grab_window = w; + si->mouse_grab_screen = screen_no; + } if (p->verbose_p) - fprintf(stderr, "%s: grabbing mouse on 0x%x... %s.\n", - blurb(), (unsigned long) w, grab_string(status)); + fprintf(stderr, "%s: %d: grabbing mouse on 0x%x... %s.\n", + blurb(), screen_no, (unsigned long) w, grab_string(status)); return status; } @@ -137,8 +149,9 @@ ungrab_kbd(saver_info *si) saver_preferences *p = &si->prefs; XUngrabKeyboard(si->dpy, CurrentTime); if (p->verbose_p) - fprintf(stderr, "%s: ungrabbing keyboard (was 0x%x).\n", blurb(), - (unsigned long) si->keyboard_grab_window); + fprintf(stderr, "%s: %d: ungrabbing keyboard (was 0x%x).\n", + blurb(), si->keyboard_grab_screen, + (unsigned long) si->keyboard_grab_window); si->keyboard_grab_window = 0; } @@ -149,38 +162,51 @@ ungrab_mouse(saver_info *si) saver_preferences *p = &si->prefs; XUngrabPointer(si->dpy, CurrentTime); if (p->verbose_p) - fprintf(stderr, "%s: ungrabbing mouse (was 0x%x).\n", blurb(), - (unsigned long) si->mouse_grab_window); + fprintf(stderr, "%s: %d: ungrabbing mouse (was 0x%x).\n", + blurb(), si->mouse_grab_screen, + (unsigned long) si->mouse_grab_window); si->mouse_grab_window = 0; } static Bool -grab_keyboard_and_mouse (saver_info *si, Window window, Cursor cursor) +grab_keyboard_and_mouse (saver_info *si, Window window, Cursor cursor, + int screen_no) { Status mstatus, kstatus; - XSync (si->dpy, False); + int i; + int retries = 4; - kstatus = grab_kbd (si, window); - if (kstatus != GrabSuccess) - { /* try again in a second */ + for (i = 0; i < retries; i++) + { + XSync (si->dpy, False); + kstatus = grab_kbd (si, window, screen_no); + if (kstatus == GrabSuccess) + break; + + /* else, wait a second and try to grab again. */ sleep (1); - kstatus = grab_kbd (si, window); - if (kstatus != GrabSuccess) - fprintf (stderr, "%s: couldn't grab keyboard! (%s)\n", - blurb(), grab_string(kstatus)); } - mstatus = grab_mouse (si, window, cursor); - if (mstatus != GrabSuccess) - { /* try again in a second */ + if (kstatus != GrabSuccess) + fprintf (stderr, "%s: couldn't grab keyboard! (%s)\n", + blurb(), grab_string(kstatus)); + + for (i = 0; i < retries; i++) + { + XSync (si->dpy, False); + mstatus = grab_mouse (si, window, cursor, screen_no); + if (mstatus == GrabSuccess) + break; + + /* else, wait a second and try to grab again. */ sleep (1); - mstatus = grab_mouse (si, window, cursor); - if (mstatus != GrabSuccess) - fprintf (stderr, "%s: couldn't grab pointer! (%s)\n", - blurb(), grab_string(mstatus)); } + if (mstatus != GrabSuccess) + fprintf (stderr, "%s: couldn't grab pointer! (%s)\n", + blurb(), grab_string(mstatus)); + return (kstatus == GrabSuccess || mstatus == GrabSuccess); } @@ -194,12 +220,12 @@ ungrab_keyboard_and_mouse (saver_info *si) int -move_mouse_grab (saver_info *si, Window to, Cursor cursor) +move_mouse_grab (saver_info *si, Window to, Cursor cursor, int to_screen_no) { Window old = si->mouse_grab_window; if (old == 0) - return grab_mouse (si, to, cursor); + return grab_mouse (si, to, cursor, to_screen_no); else { saver_preferences *p = &si->prefs; @@ -213,18 +239,18 @@ move_mouse_grab (saver_info *si, Window to, Cursor cursor) fprintf(stderr, "%s: grabbing server...\n", blurb()); ungrab_mouse (si); - status = grab_mouse (si, to, cursor); + status = grab_mouse (si, to, cursor, to_screen_no); if (status != GrabSuccess) /* Augh! */ { sleep (1); /* Note dramatic evil of sleeping with server grabbed. */ XSync (si->dpy, False); - status = grab_mouse (si, to, cursor); + status = grab_mouse (si, to, cursor, to_screen_no); } if (status != GrabSuccess) /* Augh! Try to get the old one back... */ - grab_mouse (si, to, cursor); + grab_mouse (si, old, cursor, to_screen_no); XUngrabServer (si->dpy); XSync (si->dpy, False); /* ###### (danger over) */ @@ -613,7 +639,9 @@ handle_signals (saver_info *si, Bool on_p) catch_signal (si, SIGQUIT, on_p); catch_signal (si, SIGILL, on_p); catch_signal (si, SIGTRAP, on_p); +#ifdef SIGIOT catch_signal (si, SIGIOT, on_p); +#endif catch_signal (si, SIGABRT, on_p); #ifdef SIGEMT catch_signal (si, SIGEMT, on_p); @@ -821,6 +849,7 @@ void get_screen_viewport (saver_screen_info *ssi, int *x_ret, int *y_ret, int *w_ret, int *h_ret, + int target_x, int target_y, Bool verbose_p) { int w = WidthOfScreen (ssi->screen); @@ -828,20 +857,68 @@ get_screen_viewport (saver_screen_info *ssi, #ifdef HAVE_XF86VMODE saver_info *si = ssi->global; - int screen_no = screen_number (ssi->screen); - int op, event, error; + int event, error; int dot; XF86VidModeModeLine ml; int x, y; + Bool xinerama_p; + Bool placement_only_p = (target_x != -1 && target_y != -1); + +#ifdef HAVE_XINERAMA + xinerama_p = (XineramaQueryExtension (si->dpy, &event, &error) && + XineramaIsActive (si->dpy)); +#else /* !HAVE_XINERAMA */ + /* Even if we don't have the client-side Xinerama lib, check to see if + the server supports Xinerama, so that we know to ignore the VidMode + extension -- otherwise a server crash could result. Yay. */ + xinerama_p = XQueryExtension (si->dpy, "XINERAMA", &error, &event, &error); + +#endif /* !HAVE_XINERAMA */ - /* Check for Xinerama first, because the VidModeExtension is broken - when Xinerama is present. Wheee! - */ +#ifdef HAVE_XINERAMA + if (xinerama_p && placement_only_p) + { + int nscreens = 0; + XineramaScreenInfo *xsi = XineramaQueryScreens (si->dpy, &nscreens); + if (xsi) + { + /* Find the screen that contains the mouse. */ + int which = -1; + int i; + for (i = 0; i < nscreens; i++) + { + if (target_x >= xsi[i].x_org && + target_y >= xsi[i].y_org && + target_x < xsi[i].x_org + xsi[i].width && + target_y < xsi[i].y_org + xsi[i].height) + which = i; + if (verbose_p) + { + fprintf (stderr, "%s: %d: xinerama vp: %dx%d+%d+%d", + blurb(), i, + xsi[which].width, xsi[which].height, + xsi[i].x_org, xsi[i].y_org); + if (which == i) + fprintf (stderr, "; mouse at %d,%d", + target_x, target_y); + fprintf (stderr, ".\n"); + } + } + if (which == -1) which = 0; /* didn't find it? Use the first. */ + *x_ret = xsi[which].x_org; + *y_ret = xsi[which].y_org; + *w_ret = xsi[which].width; + *h_ret = xsi[which].height; + XFree (xsi); + return; + } + } +#endif /* HAVE_XINERAMA */ - if (!XQueryExtension (si->dpy, "XINERAMA", &op, &event, &error) && + if (!xinerama_p && /* Xinerama + VidMode = broken. */ XF86VidModeQueryExtension (si->dpy, &event, &error) && - XF86VidModeGetModeLine (si->dpy, screen_no, &dot, &ml) && - XF86VidModeGetViewPort (si->dpy, screen_no, &x, &y)) + XF86VidModeGetModeLine (si->dpy, ssi->number, &dot, &ml) && + XF86VidModeGetViewPort (si->dpy, ssi->number, &x, &y)) { char msg[512]; *x_ret = x; @@ -880,10 +957,10 @@ get_screen_viewport (saver_screen_info *ssi, *h_ret = h; return; } - - sprintf (msg, "%s: vp is %dx%d+%d+%d", - blurb(), *w_ret, *h_ret, *x_ret, *y_ret); + sprintf (msg, "%s: %d: vp is %dx%d+%d+%d", + blurb(), ssi->number, + *w_ret, *h_ret, *x_ret, *y_ret); /* Apparently, though the server stores the X position in increments of @@ -946,6 +1023,80 @@ get_screen_viewport (saver_screen_info *ssi, } +static Bool error_handler_hit_p = False; + +static int +ignore_all_errors_ehandler (Display *dpy, XErrorEvent *error) +{ + error_handler_hit_p = True; + return 0; +} + + +/* Returns True if successful, False if an X error occurred. + We need this because other programs might have done things to + our window that will cause XChangeWindowAttributes() to fail: + if that happens, we give up, destroy the window, and re-create + it. + */ +static Bool +safe_XChangeWindowAttributes (Display *dpy, Window window, + unsigned long mask, + XSetWindowAttributes *attrs) +{ + XErrorHandler old_handler; + XSync (dpy, False); + error_handler_hit_p = False; + old_handler = XSetErrorHandler (ignore_all_errors_ehandler); + + XChangeWindowAttributes (dpy, window, mask, attrs); + + XSync (dpy, False); + XSetErrorHandler (old_handler); + XSync (dpy, False); + + return (!error_handler_hit_p); +} + + +/* This might not be necessary, but just in case. */ +static Bool +safe_XConfigureWindow (Display *dpy, Window window, + unsigned long mask, XWindowChanges *changes) +{ + XErrorHandler old_handler; + XSync (dpy, False); + error_handler_hit_p = False; + old_handler = XSetErrorHandler (ignore_all_errors_ehandler); + + XConfigureWindow (dpy, window, mask, changes); + + XSync (dpy, False); + XSetErrorHandler (old_handler); + XSync (dpy, False); + + return (!error_handler_hit_p); +} + +/* This might not be necessary, but just in case. */ +static Bool +safe_XDestroyWindow (Display *dpy, Window window) +{ + XErrorHandler old_handler; + XSync (dpy, False); + error_handler_hit_p = False; + old_handler = XSetErrorHandler (ignore_all_errors_ehandler); + + XDestroyWindow (dpy, window); + + XSync (dpy, False); + XSetErrorHandler (old_handler); + XSync (dpy, False); + + return (!error_handler_hit_p); +} + + static void initialize_screensaver_window_1 (saver_screen_info *ssi) { @@ -963,8 +1114,9 @@ initialize_screensaver_window_1 (saver_screen_info *ssi) unsigned long attrmask; int x, y, width, height; static Bool printed_visual_info = False; /* only print the message once. */ + Window horked_window = 0; - get_screen_viewport (ssi, &x, &y, &width, &height, + get_screen_viewport (ssi, &x, &y, &width, &height, -1, -1, (p->verbose_p && !si->screen_blanked_p)); black.red = black.green = black.blue = 0; @@ -1025,7 +1177,7 @@ initialize_screensaver_window_1 (saver_screen_info *ssi) ; else if (ssi->current_visual == DefaultVisualOfScreen (ssi->screen)) { - fprintf (stderr, "%s: using default visual ", blurb()); + fprintf (stderr, "%s: %d: visual ", blurb(), ssi->number); describe_visual (stderr, ssi->screen, ssi->current_visual, install_cmap_p); } @@ -1102,12 +1254,17 @@ initialize_screensaver_window_1 (saver_screen_info *ssi) changes.height = height; changes.border_width = 0; - XConfigureWindow (si->dpy, ssi->screensaver_window, - changesmask, &changes); - XChangeWindowAttributes (si->dpy, ssi->screensaver_window, - attrmask, &attrs); + if (! (safe_XConfigureWindow (si->dpy, ssi->screensaver_window, + changesmask, &changes) && + safe_XChangeWindowAttributes (si->dpy, ssi->screensaver_window, + attrmask, &attrs))) + { + horked_window = ssi->screensaver_window; + ssi->screensaver_window = 0; + } } - else + + if (!ssi->screensaver_window) { ssi->screensaver_window = XCreateWindow (si->dpy, RootWindowOfScreen (ssi->screen), @@ -1116,9 +1273,22 @@ initialize_screensaver_window_1 (saver_screen_info *ssi) ssi->current_visual, attrmask, &attrs); reset_stderr (ssi); + + if (horked_window) + { + fprintf (stderr, + "%s: someone horked our saver window (0x%lx)! Recreating it...\n", + blurb(), (unsigned long) horked_window); + maybe_transfer_grabs (ssi, horked_window, ssi->screensaver_window, + ssi->number); + safe_XDestroyWindow (si->dpy, horked_window); + horked_window = 0; + } + if (p->verbose_p) - fprintf (stderr, "%s: saver window is 0x%lx.\n", - blurb(), (unsigned long) ssi->screensaver_window); + fprintf (stderr, "%s: %d: saver window is 0x%lx.\n", + blurb(), ssi->number, + (unsigned long) ssi->screensaver_window); } store_saver_id (ssi); /* store window name and IDs */ @@ -1258,22 +1428,63 @@ raise_window (saver_info *si, } } + +int +mouse_screen (saver_info *si) +{ + saver_preferences *p = &si->prefs; + + if (si->nscreens == 1) + return 0; + else + { + int i; + for (i = 0; i < si->nscreens; i++) + { + saver_screen_info *ssi = &si->screens[i]; + Window pointer_root, pointer_child; + int root_x, root_y, win_x, win_y; + unsigned int mask; + if (XQueryPointer (si->dpy, + RootWindowOfScreen (ssi->screen), + &pointer_root, &pointer_child, + &root_x, &root_y, &win_x, &win_y, &mask)) + { + if (p->verbose_p) + fprintf (stderr, "%s: mouse is on screen %d\n", + blurb(), i, si->nscreens); + return i; + } + } + + /* couldn't figure out where the mouse is? Oh well. */ + return 0; + } +} + + Bool blank_screen (saver_info *si) { int i; Bool ok; + Window w; + int mscreen; /* Note: we do our grabs on the root window, not on the screensaver window. If we grabbed on the saver window, then the demo mode and lock dialog boxes wouldn't get any events. + + By "the root window", we mean "the root window that contains the mouse." + We use to always grab the mouse on screen 0, but that has the effect of + moving the mouse to screen 0 from whichever screen it was on, on + multi-head systems. */ - ok = grab_keyboard_and_mouse (si, - /*si->screens[0].screensaver_window,*/ - RootWindowOfScreen(si->screens[0].screen), - (si->demoing_p - ? 0 - : si->screens[0].cursor)); + mscreen = mouse_screen (si); + w = RootWindowOfScreen(si->screens[mscreen].screen); + ok = grab_keyboard_and_mouse (si, w, + (si->demoing_p ? 0 : si->screens[0].cursor), + mscreen); if (si->using_mit_saver_extension || si->using_sgi_saver_extension) @@ -1439,6 +1650,47 @@ unblank_screen (saver_info *si) } +/* Transfer any grabs from the old window to the new. + Actually I think none of this is necessary, since we always + hold our grabs on the root window, but I wrote this before + re-discovering that... + */ +static void +maybe_transfer_grabs (saver_screen_info *ssi, + Window old_w, Window new_w, + int new_screen_no) +{ + saver_info *si = ssi->global; + + /* If the old window held our mouse grab, transfer the grab to the new + window. (Grab the server while so doing, to avoid a race condition.) + */ + if (old_w == si->mouse_grab_window) + { + XGrabServer (si->dpy); /* ############ DANGER! */ + ungrab_mouse (si); + grab_mouse (si, ssi->screensaver_window, + (si->demoing_p ? 0 : ssi->cursor), + new_screen_no); + XUngrabServer (si->dpy); + XSync (si->dpy, False); /* ###### (danger over) */ + } + + /* If the old window held our keyboard grab, transfer the grab to the new + window. (Grab the server while so doing, to avoid a race condition.) + */ + if (old_w == si->keyboard_grab_window) + { + XGrabServer (si->dpy); /* ############ DANGER! */ + ungrab_kbd(si); + grab_kbd(si, ssi->screensaver_window, ssi->number); + XUngrabServer (si->dpy); + XSync (si->dpy, False); /* ###### (danger over) */ + } +} + + + Bool select_visual (saver_screen_info *ssi, const char *visual_name) { @@ -1500,10 +1752,10 @@ select_visual (saver_screen_info *ssi, const char *visual_name) if (p->verbose_p) { - fprintf (stderr, "%s: switching to visual ", blurb()); + fprintf (stderr, "%s: %d: visual ", blurb(), ssi->number); describe_visual (stderr, ssi->screen, new_v, install_cmap_p); #if 0 - fprintf (stderr, "%s: from ", blurb()); + fprintf (stderr, "%s: from ", blurb()); describe_visual (stderr, ssi->screen, ssi->current_visual, was_installed_p); #endif @@ -1527,50 +1779,15 @@ select_visual (saver_screen_info *ssi, const char *visual_name) store_vroot_property (si->dpy, ssi->screensaver_window, ssi->screensaver_window); + /* Transfer any grabs from the old window to the new. */ + maybe_transfer_grabs (ssi, old_w, ssi->screensaver_window, ssi->number); - /* Transfer the grabs from the old window to the new. - Actually I think none of this is necessary, since we always - hold our grabs on the root window, but I wrote this before - re-discovering that... - */ - - - /* If we're destroying the window that holds our mouse grab, - transfer the grab to the new window. (Grab the server while - so doing, to avoid a race condition.) - */ - if (old_w == si->mouse_grab_window) - { - XGrabServer (si->dpy); /* ############ DANGER! */ - ungrab_mouse (si); - grab_mouse (si, ssi->screensaver_window, - (si->demoing_p - ? 0 - : ssi->cursor)); - XUngrabServer (si->dpy); - XSync (si->dpy, False); /* ###### (danger over) */ - } - - /* If we're destroying the window that holds our keyboard grab, - transfer the grab to the new window. (Grab the server while - so doing, to avoid a race condition.) - */ - if (old_w == si->keyboard_grab_window) - { - XGrabServer (si->dpy); /* ############ DANGER! */ - ungrab_kbd(si); - grab_kbd(si, ssi->screensaver_window); - XUngrabServer (si->dpy); - XSync (si->dpy, False); /* ###### (danger over) */ - } - - /* Now we can destroy this window without horking our grabs. */ - + /* Now we can destroy the old window without horking our grabs. */ XDestroyWindow (si->dpy, old_w); if (p->verbose_p) - fprintf (stderr, "%s: destroyed old saver window 0x%lx.\n", - blurb(), (unsigned long) old_w); + fprintf (stderr, "%s: %d: destroyed old saver window 0x%lx.\n", + blurb(), ssi->number, (unsigned long) old_w); if (old_c && old_c != DefaultColormapOfScreen (ssi->screen) &&