gtk2/gdk/gdk.c
Matthias Clasen 1751a74916 Use g_return_val_if_fail in this non-void function. (gdk_init_check):
* gdk/gdk.c (gdk_display_open_default_libgtk_only): Use
	g_return_val_if_fail in this non-void function.
	(gdk_init_check): Remove unused variable.
2002-11-07 21:05:52 +00:00

528 lines
12 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 <string.h>
#include <stdlib.h>
#include "gdk.h"
#include "gdkinternals.h"
#ifndef HAVE_XCONVERTCASE
#include "gdkkeysyms.h"
#endif
typedef struct _GdkPredicate GdkPredicate;
struct _GdkPredicate
{
GdkEventFunc func;
gpointer data;
};
/* Private variable declarations
*/
static int gdk_initialized = 0; /* 1 if the library is initialized,
* 0 otherwise.
*/
static gchar *gdk_progclass = NULL;
static gint gdk_argc = 0;
static gchar **gdk_argv = NULL;
#ifdef G_ENABLE_DEBUG
static const GDebugKey gdk_debug_keys[] = {
{"events", GDK_DEBUG_EVENTS},
{"misc", GDK_DEBUG_MISC},
{"dnd", GDK_DEBUG_DND},
{"xim", GDK_DEBUG_XIM},
{"nograbs", GDK_DEBUG_NOGRABS},
{"colormap", GDK_DEBUG_COLORMAP},
{"gdkrgb", GDK_DEBUG_GDKRGB},
{"gc", GDK_DEBUG_GC},
{"pixmap", GDK_DEBUG_PIXMAP},
{"image", GDK_DEBUG_IMAGE},
{"input", GDK_DEBUG_INPUT},
{"cursor", GDK_DEBUG_CURSOR},
{"multihead", GDK_DEBUG_MULTIHEAD},
};
static const int gdk_ndebug_keys = G_N_ELEMENTS (gdk_debug_keys);
#endif /* G_ENABLE_DEBUG */
static GdkArgContext *
gdk_arg_context_new (gpointer cb_data)
{
GdkArgContext *result = g_new (GdkArgContext, 1);
result->tables = g_ptr_array_new ();
result->cb_data = cb_data;
return result;
}
static void
gdk_arg_context_destroy (GdkArgContext *context)
{
g_ptr_array_free (context->tables, TRUE);
g_free (context);
}
static void
gdk_arg_context_add_table (GdkArgContext *context, GdkArgDesc *table)
{
g_ptr_array_add (context->tables, table);
}
static void
gdk_arg_context_parse (GdkArgContext *context, gint *argc, gchar ***argv)
{
int i, j, k;
/* Save a copy of the original argc and argv */
if (argc && argv)
{
for (i = 1; i < *argc; i++)
{
char *arg;
if (!(*argv)[i][0] == '-' && (*argv)[i][1] == '-')
continue;
arg = (*argv)[i] + 2;
/* '--' terminates list of arguments */
if (arg == 0)
{
(*argv)[i] = NULL;
break;
}
for (j = 0; j < context->tables->len; j++)
{
GdkArgDesc *table = context->tables->pdata[j];
for (k = 0; table[k].name; k++)
{
switch (table[k].type)
{
case GDK_ARG_STRING:
case GDK_ARG_CALLBACK:
case GDK_ARG_INT:
{
int len = strlen (table[k].name);
if (strncmp (arg, table[k].name, len) == 0 &&
(arg[len] == '=' || arg[len] == 0))
{
char *value = NULL;
(*argv)[i] = NULL;
if (arg[len] == '=')
value = arg + len + 1;
else if (i < *argc - 1)
{
value = (*argv)[i + 1];
(*argv)[i+1] = NULL;
i++;
}
else
value = "";
switch (table[k].type)
{
case GDK_ARG_STRING:
*(gchar **)table[k].location = g_strdup (value);
break;
case GDK_ARG_INT:
*(gint *)table[k].location = atoi (value);
break;
case GDK_ARG_CALLBACK:
(*table[k].callback)(table[k].name, value, context->cb_data);
break;
default:
;
}
goto next_arg;
}
break;
}
case GDK_ARG_BOOL:
case GDK_ARG_NOBOOL:
if (strcmp (arg, table[k].name) == 0)
{
(*argv)[i] = NULL;
*(gboolean *)table[k].location = (table[k].type == GDK_ARG_BOOL) ? TRUE : FALSE;
goto next_arg;
}
}
}
}
next_arg:
;
}
for (i = 1; i < *argc; i++)
{
for (k = i; k < *argc; k++)
if ((*argv)[k] != NULL)
break;
if (k > i)
{
k -= i;
for (j = i + k; j < *argc; j++)
(*argv)[j-k] = (*argv)[j];
*argc -= k;
}
}
}
}
#ifdef G_ENABLE_DEBUG
static void
gdk_arg_debug_cb (const char *key, const char *value, gpointer user_data)
{
_gdk_debug_flags |= g_parse_debug_string (value,
(GDebugKey *) gdk_debug_keys,
gdk_ndebug_keys);
}
static void
gdk_arg_no_debug_cb (const char *key, const char *value, gpointer user_data)
{
_gdk_debug_flags &= ~g_parse_debug_string (value,
(GDebugKey *) gdk_debug_keys,
gdk_ndebug_keys);
}
#endif /* G_ENABLE_DEBUG */
static void
gdk_arg_class_cb (const char *key, const char *value, gpointer user_data)
{
gdk_set_program_class (value);
}
static void
gdk_arg_name_cb (const char *key, const char *value, gpointer user_data)
{
g_set_prgname (value);
}
static GdkArgDesc gdk_args[] = {
{ "class" , GDK_ARG_CALLBACK, NULL, gdk_arg_class_cb },
{ "name", GDK_ARG_CALLBACK, NULL, gdk_arg_name_cb },
{ "display", GDK_ARG_STRING, &_gdk_display_name, (GdkArgFunc)NULL },
{ "screen", GDK_ARG_INT, &_gdk_screen_number, (GdkArgFunc)NULL },
#ifdef G_ENABLE_DEBUG
{ "gdk-debug", GDK_ARG_CALLBACK, NULL, gdk_arg_debug_cb },
{ "gdk-no-debug", GDK_ARG_CALLBACK, NULL, gdk_arg_no_debug_cb },
#endif /* G_ENABLE_DEBUG */
{ NULL }
};
/**
* _gdk_get_command_line_args:
* @argv: location to store argv pointer
* @argc: location
*
* Retrieve the command line arguments passed to gdk_init().
* The returned argv pointer points to static storage ; no
* copy is made.
**/
void
_gdk_get_command_line_args (int *argc,
char ***argv)
{
*argc = gdk_argc;
*argv = gdk_argv;
}
/**
* gdk_parse_args:
* @argc: the number of command line arguments.
* @argv: the array of command line arguments.
*
* Parse command line arguments, and store for future
* use by calls to gdk_display_open().
*
* Any arguments used by GDK are removed from the array and @argc and @argv are
* updated accordingly.
*
* You shouldn't call this function explicitely if you are using
* gtk_init(), gtk_init_check(), gdk_init(), or gdk_init_check().
**/
void
gdk_parse_args (int *argc,
char ***argv)
{
GdkArgContext *arg_context;
gint i;
if (gdk_initialized)
return;
gdk_initialized = TRUE;
if (argc && argv)
{
gdk_argc = *argc;
gdk_argv = g_malloc ((gdk_argc + 1) * sizeof (char*));
for (i = 0; i < gdk_argc; i++)
gdk_argv[i] = g_strdup ((*argv)[i]);
gdk_argv[gdk_argc] = NULL;
if (*argc > 0)
{
gchar *d;
d = strrchr((*argv)[0], G_DIR_SEPARATOR);
if (d != NULL)
g_set_prgname (d + 1);
else
g_set_prgname ((*argv)[0]);
}
}
else
{
g_set_prgname ("<unknown>");
}
/* We set the fallback program class here, rather than lazily in
* gdk_get_program_class, since we don't want -name to override it.
*/
gdk_progclass = g_strdup (g_get_prgname ());
if (gdk_progclass[0])
gdk_progclass[0] = g_ascii_toupper (gdk_progclass[0]);
#ifdef G_ENABLE_DEBUG
{
gchar *debug_string = getenv("GDK_DEBUG");
if (debug_string != NULL)
_gdk_debug_flags = g_parse_debug_string (debug_string,
(GDebugKey *) gdk_debug_keys,
gdk_ndebug_keys);
}
#endif /* G_ENABLE_DEBUG */
arg_context = gdk_arg_context_new (NULL);
gdk_arg_context_add_table (arg_context, gdk_args);
gdk_arg_context_add_table (arg_context, _gdk_windowing_args);
gdk_arg_context_parse (arg_context, argc, argv);
gdk_arg_context_destroy (arg_context);
GDK_NOTE (MISC, g_message ("progname: \"%s\"", g_get_prgname ()));
g_type_init ();
/* Do any setup particular to the windowing system
*/
_gdk_windowing_init (argc, argv);
}
/**
* gdk_get_display_arg_name:
*
* Gets the display name specified in the command line arguments passed
* to gdk_init() or gdk_parse_args(), if any.
*
* Returns: the display name, if specified explicitely, otherwise %NULL
* this string is owned by GTK+ and must not be modified or freed.
*/
G_CONST_RETURN gchar *
gdk_get_display_arg_name (void)
{
if (!_gdk_display_arg_name)
{
if (_gdk_screen_number >= 0)
_gdk_display_arg_name = _gdk_windowing_substitute_screen_number (_gdk_display_name, _gdk_screen_number);
else
_gdk_display_arg_name = g_strdup (_gdk_display_name);
}
return _gdk_display_arg_name;
}
/**
* gdk_display_open_default_libgtk_only:
*
* Opens the default display specified by command line arguments or
* environment variables, sets it as the default display, and returns
* it. gdk_parse_args must have been called first. If the default
* display has previously been set, simply returns that. An internal
* function that should not be used by applications.
*
* Return value: the default display, if it could be opened,
* otherwise %NULL.
**/
GdkDisplay *
gdk_display_open_default_libgtk_only (void)
{
GdkDisplay *display;
g_return_val_if_fail (gdk_initialized, NULL);
display = gdk_display_get_default ();
if (display)
return display;
display = gdk_display_open (gdk_get_display_arg_name ());
if (!display && _gdk_screen_number >= 0)
{
g_free (_gdk_display_arg_name);
_gdk_display_arg_name = g_strdup (_gdk_display_name);
display = gdk_display_open (_gdk_display_name);
}
if (display)
gdk_display_manager_set_default_display (gdk_display_manager_get (),
display);
return display;
}
/*
*--------------------------------------------------------------
* gdk_init_check
*
* Initialize the library for use.
*
* Arguments:
* "argc" is the number of arguments.
* "argv" is an array of strings.
*
* Results:
* "argc" and "argv" are modified to reflect any arguments
* which were not handled. (Such arguments should either
* be handled by the application or dismissed). If initialization
* fails, returns FALSE, otherwise TRUE.
*
* Side effects:
* The library is initialized.
*
*--------------------------------------------------------------
*/
gboolean
gdk_init_check (int *argc,
char ***argv)
{
gdk_parse_args (argc, argv);
return gdk_display_open_default_libgtk_only () != NULL;
}
void
gdk_init (int *argc, char ***argv)
{
if (!gdk_init_check (argc, argv))
{
g_warning ("cannot open display: %s", gdk_get_display_arg_name ());
exit(1);
}
}
/*
*--------------------------------------------------------------
* gdk_exit
*
* Restores the library to an un-itialized state and exits
* the program using the "exit" system call.
*
* Arguments:
* "errorcode" is the error value to pass to "exit".
*
* Results:
* Allocated structures are freed and the program exits
* cleanly.
*
* Side effects:
*
*--------------------------------------------------------------
*/
void
gdk_exit (gint errorcode)
{
/* de-initialisation is done by the gdk_exit_funct(),
no need to do this here (Alex J.) */
exit (errorcode);
}
void
gdk_threads_enter ()
{
GDK_THREADS_ENTER ();
}
void
gdk_threads_leave ()
{
GDK_THREADS_LEAVE ();
}
/**
* gdk_threads_init:
*
* Initializes GDK so that it can be used from multiple threads
* in conjunction with gdk_threads_enter() and gdk_threads_leave().
* g_thread_init() must be called previous to this function.
*
* This call must be made before any use of the main loop from
* GTK+; to be safe, call it before gtk_init().
**/
void
gdk_threads_init ()
{
if (!g_thread_supported ())
g_error ("g_thread_init() must be called before gdk_threads_init()");
gdk_threads_mutex = g_mutex_new ();
}
G_CONST_RETURN char *
gdk_get_program_class (void)
{
return gdk_progclass;
}
void
gdk_set_program_class (const char *program_class)
{
if (gdk_progclass)
g_free (gdk_progclass);
gdk_progclass = g_strdup (program_class);
}