gtk/gdk/x11/gdkmain-x11.c
Havoc Pennington dd0aa0d815 Improve error messages for X errors and losing connection to the X server.
2001-05-11  Havoc Pennington  <hp@pobox.com>

	* gdk/x11/gdkmain-x11.c: Improve error messages for X errors and
	losing connection to the X server.
2001-05-20 22:48:40 +00:00

752 lines
18 KiB
C

/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#ifdef HAVE_XKB
#include <X11/XKBlib.h>
#endif
#include "gdk.h"
#include "gdkprivate-x11.h"
#include "gdkinternals.h"
#include "gdkregion-generic.h"
#include "gdkinputprivate.h"
#include <pango/pangox.h>
typedef struct _GdkPredicate GdkPredicate;
typedef struct _GdkErrorTrap GdkErrorTrap;
struct _GdkPredicate
{
GdkEventFunc func;
gpointer data;
};
struct _GdkErrorTrap
{
gint error_warnings;
gint error_code;
};
/*
* Private function declarations
*/
#ifndef HAVE_XCONVERTCASE
static void gdkx_XConvertCase (KeySym symbol,
KeySym *lower,
KeySym *upper);
#define XConvertCase gdkx_XConvertCase
#endif
static int gdk_x_error (Display *display,
XErrorEvent *error);
static int gdk_x_io_error (Display *display);
/* Private variable declarations
*/
static int gdk_initialized = 0; /* 1 if the library is initialized,
* 0 otherwise.
*/
static gint autorepeat;
static gboolean gdk_synchronize = FALSE;
#ifdef G_ENABLE_DEBUG
static const GDebugKey gdk_debug_keys[] = {
{"events", GDK_DEBUG_EVENTS},
{"misc", GDK_DEBUG_MISC},
{"dnd", GDK_DEBUG_DND},
{"color-context", GDK_DEBUG_COLOR_CONTEXT},
{"xim", GDK_DEBUG_XIM}
};
static const int gdk_ndebug_keys = sizeof(gdk_debug_keys)/sizeof(GDebugKey);
#endif /* G_ENABLE_DEBUG */
GdkArgDesc _gdk_windowing_args[] = {
{ "display", GDK_ARG_STRING, &gdk_display_name, (GdkArgFunc)NULL },
{ "sync", GDK_ARG_BOOL, &gdk_synchronize, (GdkArgFunc)NULL },
{ "no-xshm", GDK_ARG_NOBOOL, &gdk_use_xshm, (GdkArgFunc)NULL },
{ "class", GDK_ARG_STRING, &gdk_progclass, (GdkArgFunc)NULL },
{ "gxid-host", GDK_ARG_STRING, &gdk_input_gxid_host, (GdkArgFunc)NULL },
{ "gxid-port", GDK_ARG_INT, &gdk_input_gxid_port, (GdkArgFunc)NULL },
{ NULL }
};
gboolean
_gdk_windowing_init_check (int argc, char **argv)
{
XKeyboardState keyboard_state;
XClassHint *class_hint;
guint pid;
XSetErrorHandler (gdk_x_error);
XSetIOErrorHandler (gdk_x_io_error);
gdk_display = XOpenDisplay (gdk_display_name);
if (!gdk_display)
return FALSE;
if (gdk_synchronize)
XSynchronize (gdk_display, True);
gdk_screen = DefaultScreen (gdk_display);
gdk_root_window = RootWindow (gdk_display, gdk_screen);
gdk_leader_window = XCreateSimpleWindow(gdk_display, gdk_root_window,
10, 10, 10, 10, 0, 0 , 0);
class_hint = XAllocClassHint();
class_hint->res_name = g_get_prgname ();
if (gdk_progclass == NULL)
{
gdk_progclass = g_strdup (g_get_prgname ());
gdk_progclass[0] = toupper (gdk_progclass[0]);
}
class_hint->res_class = gdk_progclass;
XmbSetWMProperties (gdk_display, gdk_leader_window,
NULL, NULL, argv, argc,
NULL, NULL, class_hint);
XFree (class_hint);
pid = getpid();
XChangeProperty (gdk_display, gdk_leader_window,
gdk_atom_intern ("_NET_WM_PID", FALSE),
XA_CARDINAL, 32,
PropModeReplace,
(guchar *)&pid, 1);
gdk_wm_delete_window = gdk_atom_intern ("WM_DELETE_WINDOW", FALSE);
gdk_wm_take_focus = gdk_atom_intern ("WM_TAKE_FOCUS", FALSE);
gdk_wm_protocols = gdk_atom_intern ("WM_PROTOCOLS", FALSE);
gdk_wm_window_protocols[0] = gdk_wm_delete_window;
gdk_wm_window_protocols[1] = gdk_wm_take_focus;
gdk_wm_window_protocols[2] = gdk_atom_intern ("_NET_WM_PING", FALSE);
gdk_selection_property = gdk_atom_intern ("GDK_SELECTION", FALSE);
XGetKeyboardControl (gdk_display, &keyboard_state);
autorepeat = keyboard_state.global_auto_repeat;
#ifdef HAVE_XKB
{
gint xkb_major = XkbMajorVersion;
gint xkb_minor = XkbMinorVersion;
if (XkbLibraryVersion (&xkb_major, &xkb_minor))
{
xkb_major = XkbMajorVersion;
xkb_minor = XkbMinorVersion;
if (XkbQueryExtension (gdk_display, NULL, NULL, NULL,
&xkb_major, &xkb_minor))
{
Bool detectable_autorepeat_supported;
_gdk_use_xkb = TRUE;
XkbSelectEvents (gdk_display,
XkbUseCoreKbd,
XkbMapNotifyMask,
XkbMapNotifyMask);
XkbSetDetectableAutoRepeat (gdk_display,
True,
&detectable_autorepeat_supported);
GDK_NOTE (MISC, g_message ("Detectable autorepeat %s.",
detectable_autorepeat_supported ? "supported" : "not supported"));
_gdk_have_xkb_autorepeat = detectable_autorepeat_supported;
}
}
}
#endif
return TRUE;
}
void
gdk_set_use_xshm (gboolean use_xshm)
{
gdk_use_xshm = use_xshm;
}
gboolean
gdk_get_use_xshm (void)
{
return gdk_use_xshm;
}
static GdkGrabStatus
gdk_x11_convert_grab_status (gint status)
{
switch (status)
{
case GrabSuccess:
return GDK_GRAB_SUCCESS;
case AlreadyGrabbed:
return GDK_GRAB_ALREADY_GRABBED;
case GrabInvalidTime:
return GDK_GRAB_INVALID_TIME;
case GrabNotViewable:
return GDK_GRAB_NOT_VIEWABLE;
case GrabFrozen:
return GDK_GRAB_FROZEN;
}
g_assert_not_reached();
return 0;
}
/*
*--------------------------------------------------------------
* gdk_pointer_grab
*
* Grabs the pointer to a specific window
*
* Arguments:
* "window" is the window which will receive the grab
* "owner_events" specifies whether events will be reported as is,
* or relative to "window"
* "event_mask" masks only interesting events
* "confine_to" limits the cursor movement to the specified window
* "cursor" changes the cursor for the duration of the grab
* "time" specifies the time
*
* Results:
*
* Side effects:
* requires a corresponding call to gdk_pointer_ungrab
*
*--------------------------------------------------------------
*/
GdkGrabStatus
gdk_pointer_grab (GdkWindow * window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow * confine_to,
GdkCursor * cursor,
guint32 time)
{
gint return_val;
GdkCursorPrivate *cursor_private;
guint xevent_mask;
Window xwindow;
Window xconfine_to;
Cursor xcursor;
int i;
g_return_val_if_fail (window != NULL, 0);
g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
g_return_val_if_fail (confine_to == NULL || GDK_IS_WINDOW (confine_to), 0);
cursor_private = (GdkCursorPrivate*) cursor;
xwindow = GDK_WINDOW_XID (window);
if (!confine_to || GDK_WINDOW_DESTROYED (confine_to))
xconfine_to = None;
else
xconfine_to = GDK_WINDOW_XID (confine_to);
if (!cursor)
xcursor = None;
else
xcursor = cursor_private->xcursor;
xevent_mask = 0;
for (i = 0; i < gdk_nevent_masks; i++)
{
if (event_mask & (1 << (i + 1)))
xevent_mask |= gdk_event_mask_table[i];
}
return_val = _gdk_input_grab_pointer (window,
owner_events,
event_mask,
confine_to,
time);
if (return_val == GrabSuccess)
{
if (!GDK_WINDOW_DESTROYED (window))
return_val = XGrabPointer (GDK_WINDOW_XDISPLAY (window),
xwindow,
owner_events,
xevent_mask,
GrabModeAsync, GrabModeAsync,
xconfine_to,
xcursor,
time);
else
return_val = AlreadyGrabbed;
}
if (return_val == GrabSuccess)
gdk_xgrab_window = (GdkWindowObject *)window;
return gdk_x11_convert_grab_status (return_val);
}
/*
*--------------------------------------------------------------
* gdk_pointer_ungrab
*
* Releases any pointer grab
*
* Arguments:
*
* Results:
*
* Side effects:
*
*--------------------------------------------------------------
*/
void
gdk_pointer_ungrab (guint32 time)
{
_gdk_input_ungrab_pointer (time);
XUngrabPointer (gdk_display, time);
gdk_xgrab_window = NULL;
}
/*
*--------------------------------------------------------------
* gdk_pointer_is_grabbed
*
* Tell wether there is an active x pointer grab in effect
*
* Arguments:
*
* Results:
*
* Side effects:
*
*--------------------------------------------------------------
*/
gboolean
gdk_pointer_is_grabbed (void)
{
return gdk_xgrab_window != NULL;
}
/*
*--------------------------------------------------------------
* gdk_keyboard_grab
*
* Grabs the keyboard to a specific window
*
* Arguments:
* "window" is the window which will receive the grab
* "owner_events" specifies whether events will be reported as is,
* or relative to "window"
* "time" specifies the time
*
* Results:
*
* Side effects:
* requires a corresponding call to gdk_keyboard_ungrab
*
*--------------------------------------------------------------
*/
GdkGrabStatus
gdk_keyboard_grab (GdkWindow * window,
gboolean owner_events,
guint32 time)
{
gint return_val;
g_return_val_if_fail (window != NULL, 0);
g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
if (!GDK_WINDOW_DESTROYED (window))
return_val = XGrabKeyboard (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
owner_events,
GrabModeAsync, GrabModeAsync,
time);
else
return_val = AlreadyGrabbed;
return gdk_x11_convert_grab_status (return_val);
}
/*
*--------------------------------------------------------------
* gdk_keyboard_ungrab
*
* Releases any keyboard grab
*
* Arguments:
*
* Results:
*
* Side effects:
*
*--------------------------------------------------------------
*/
void
gdk_keyboard_ungrab (guint32 time)
{
XUngrabKeyboard (gdk_display, time);
}
/*
*--------------------------------------------------------------
* gdk_screen_width
*
* Return the width of the screen.
*
* Arguments:
*
* Results:
*
* Side effects:
*
*--------------------------------------------------------------
*/
gint
gdk_screen_width (void)
{
gint return_val;
return_val = DisplayWidth (gdk_display, gdk_screen);
return return_val;
}
/*
*--------------------------------------------------------------
* gdk_screen_height
*
* Return the height of the screen.
*
* Arguments:
*
* Results:
*
* Side effects:
*
*--------------------------------------------------------------
*/
gint
gdk_screen_height (void)
{
gint return_val;
return_val = DisplayHeight (gdk_display, gdk_screen);
return return_val;
}
/*
*--------------------------------------------------------------
* gdk_screen_width_mm
*
* Return the width of the screen in millimeters.
*
* Arguments:
*
* Results:
*
* Side effects:
*
*--------------------------------------------------------------
*/
gint
gdk_screen_width_mm (void)
{
gint return_val;
return_val = DisplayWidthMM (gdk_display, gdk_screen);
return return_val;
}
/*
*--------------------------------------------------------------
* gdk_screen_height
*
* Return the height of the screen in millimeters.
*
* Arguments:
*
* Results:
*
* Side effects:
*
*--------------------------------------------------------------
*/
gint
gdk_screen_height_mm (void)
{
gint return_val;
return_val = DisplayHeightMM (gdk_display, gdk_screen);
return return_val;
}
/*
*--------------------------------------------------------------
* gdk_set_sm_client_id
*
* Set the SM_CLIENT_ID property on the WM_CLIENT_LEADER window
* so that the window manager can save our state using the
* X11R6 ICCCM session management protocol. A NULL value should
* be set following disconnection from the session manager to
* remove the SM_CLIENT_ID property.
*
* Arguments:
*
* "sm_client_id" specifies the client id assigned to us by the
* session manager or NULL to remove the property.
*
* Results:
*
* Side effects:
*
*--------------------------------------------------------------
*/
void
gdk_set_sm_client_id (const gchar* sm_client_id)
{
if (sm_client_id && strcmp (sm_client_id, ""))
{
XChangeProperty (gdk_display, gdk_leader_window,
gdk_atom_intern ("SM_CLIENT_ID", FALSE),
XA_STRING, 8, PropModeReplace,
sm_client_id, strlen(sm_client_id));
}
else
XDeleteProperty (gdk_display, gdk_leader_window,
gdk_atom_intern ("SM_CLIENT_ID", FALSE));
}
void
gdk_beep (void)
{
XBell(gdk_display, 0);
}
void
gdk_windowing_exit (void)
{
pango_x_shutdown_display (gdk_display);
XCloseDisplay (gdk_display);
}
/*
*--------------------------------------------------------------
* gdk_x_error
*
* The X error handling routine.
*
* Arguments:
* "display" is the X display the error orignated from.
* "error" is the XErrorEvent that we are handling.
*
* Results:
* Either we were expecting some sort of error to occur,
* in which case we set the "gdk_error_code" flag, or this
* error was unexpected, in which case we will print an
* error message and exit. (Since trying to continue will
* most likely simply lead to more errors).
*
* Side effects:
*
*--------------------------------------------------------------
*/
static int
gdk_x_error (Display *display,
XErrorEvent *error)
{
if (error->error_code)
{
if (gdk_error_warnings)
{
gchar buf[64];
gchar *msg;
XGetErrorText (display, error->error_code, buf, 63);
msg =
g_strdup_printf ("The program '%s' received an X Window System error.\n"
"This probably reflects a bug in the program.\n"
"The error was '%s'.\n"
" (Details: serial %ld error_code %d request_code %d minor_code %d)\n"
" (Note to programmers: normally, X errors are reported asynchronously;\n"
" that is, you will receive the error a while after causing it.\n"
" To debug your program, run it with the --sync command line\n"
" option to change this behavior. You can then get a meaningful\n"
" backtrace from your debugger if you break on the gdk_x_error() function.)",
g_get_prgname (),
buf,
error->serial,
error->error_code,
error->request_code,
error->minor_code);
#ifdef G_ENABLE_DEBUG
g_error ("%s", msg);
#else /* !G_ENABLE_DEBUG */
fprintf (stderr, "%s\n", msg);
exit(1);
#endif /* G_ENABLE_DEBUG */
}
gdk_error_code = error->error_code;
}
return 0;
}
/*
*--------------------------------------------------------------
* gdk_x_io_error
*
* The X I/O error handling routine.
*
* Arguments:
* "display" is the X display the error orignated from.
*
* Results:
* An X I/O error basically means we lost our connection
* to the X server. There is not much we can do to
* continue, so simply print an error message and exit.
*
* Side effects:
*
*--------------------------------------------------------------
*/
static int
gdk_x_io_error (Display *display)
{
/* This is basically modelled after the code in XLib. We need
* an explicit error handler here, so we can disable our atexit()
* which would otherwise cause a nice segfault.
* We fprintf(stderr, instead of g_warning() because g_warning()
* could possibly be redirected to a dialog
*/
if (errno == EPIPE)
{
fprintf (stderr,
"The application '%s' lost its connection to the display %s;\n"
"most likely the X server was shut down or you killed/destroyed\n"
"the application.\n",
g_get_prgname (),
gdk_display ? DisplayString (gdk_display) : gdk_get_display());
}
else
{
fprintf (stderr, "%s: Fatal IO error %d (%s) on X server %s.\n",
g_get_prgname (),
errno, g_strerror (errno),
gdk_display ? DisplayString (gdk_display) : gdk_get_display());
}
/* Disable the atexit shutdown for GDK */
gdk_initialized = 0;
exit(1);
}
gchar *
gdk_get_display (void)
{
return (gchar *)XDisplayName (gdk_display_name);
}
gint
gdk_send_xevent (Window window, gboolean propagate, glong event_mask,
XEvent *event_send)
{
Status result;
gint old_warnings = gdk_error_warnings;
gdk_error_code = 0;
gdk_error_warnings = 0;
result = XSendEvent (gdk_display, window, propagate, event_mask, event_send);
XSync (gdk_display, False);
gdk_error_warnings = old_warnings;
return result && !gdk_error_code;
}
void
_gdk_region_get_xrectangles (GdkRegion *region,
gint x_offset,
gint y_offset,
XRectangle **rects,
gint *n_rects)
{
XRectangle *rectangles = g_new (XRectangle, region->numRects);
GdkRegionBox *boxes = region->rects;
gint i;
for (i = 0; i < region->numRects; i++)
{
rectangles[i].x = CLAMP (boxes[i].x1 + x_offset, G_MINSHORT, G_MAXSHORT);
rectangles[i].y = CLAMP (boxes[i].y1 + y_offset, G_MINSHORT, G_MAXSHORT);
rectangles[i].width = CLAMP (boxes[i].x2 + x_offset, G_MINSHORT, G_MAXSHORT) - rectangles[i].x;
rectangles[i].height = CLAMP (boxes[i].y2 + y_offset, G_MINSHORT, G_MAXSHORT) - rectangles[i].y;
}
*rects = rectangles;
*n_rects = region->numRects;
}