gtkmain.c

gtk是linux一款强大的夸平台的图形化开发工具

/* GTK - The GIMP Toolkit
 * 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 Library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library 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 1997-1999.  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 <X11/Xlocale.h>	/* so we get the right setlocale */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gmodule.h>
#include "gtkbutton.h"
#include "gtkdnd.h"
#include "gtkfeatures.h"
#include "gtkhscrollbar.h"
#include "gtkhseparator.h"
#include "gtkmain.h"
#include "gtkpreview.h"
#include "gtkrc.h"
#include "gtkscrolledwindow.h"
#include "gtkselection.h"
#include "gtksignal.h"
#include "gtktable.h"
#include "gtktext.h"
#include "gtkvbox.h"
#include "gtkvscrollbar.h"
#include "gtkwidget.h"
#include "gtkwindow.h"
#include "gtkprivate.h"
#include "gdk/gdki18n.h"
#include "config.h"
#include "gtkdebug.h"
#include "gtkintl.h"

/* Private type definitions
 */
typedef struct _GtkInitFunction		 GtkInitFunction;
typedef struct _GtkQuitFunction		 GtkQuitFunction;
typedef struct _GtkClosure	         GtkClosure;
typedef struct _GtkKeySnooperData	 GtkKeySnooperData;

struct _GtkInitFunction
{
  GtkFunction function;
  gpointer data;
};

struct _GtkQuitFunction
{
  guint id;
  guint main_level;
  GtkCallbackMarshal marshal;
  GtkFunction function;
  gpointer data;
  GtkDestroyNotify destroy;
};

struct _GtkClosure
{
  GtkCallbackMarshal marshal;
  gpointer data;
  GtkDestroyNotify destroy;
};

struct _GtkKeySnooperData
{
  GtkKeySnoopFunc func;
  gpointer func_data;
  guint id;
};

static void  gtk_exit_func		 (void);
static gint  gtk_quit_invoke_function	 (GtkQuitFunction    *quitf);
static void  gtk_quit_destroy		 (GtkQuitFunction    *quitf);
static gint  gtk_invoke_key_snoopers	 (GtkWidget	     *grab_widget,
					  GdkEvent	     *event);

static void     gtk_destroy_closure      (gpointer            data);
static gboolean gtk_invoke_idle_timeout  (gpointer            data);
static void     gtk_invoke_input         (gpointer            data,
					  gint                source,
					  GdkInputCondition   condition);

#if 0
static void  gtk_error			 (gchar		     *str);
static void  gtk_warning		 (gchar		     *str);
static void  gtk_message		 (gchar		     *str);
static void  gtk_print			 (gchar		     *str);
#endif

const guint gtk_major_version = GTK_MAJOR_VERSION;
const guint gtk_minor_version = GTK_MINOR_VERSION;
const guint gtk_micro_version = GTK_MICRO_VERSION;
const guint gtk_binary_age = GTK_BINARY_AGE;
const guint gtk_interface_age = GTK_INTERFACE_AGE;

static guint gtk_main_loop_level = 0;
static gint gtk_initialized = FALSE;
static GList *current_events = NULL;

static GSList *main_loops = NULL;      /* stack of currently executing main loops */

static GSList *grabs = NULL;		   /* A stack of unique grabs. The grabbing
					    *  widget is the first one on the list.
					    */
static GList *init_functions = NULL;	   /* A list of init functions.
					    */
static GList *quit_functions = NULL;	   /* A list of quit functions.
					    */
static GMemChunk *quit_mem_chunk = NULL;

static GSList *key_snoopers = NULL;

static GdkVisual *gtk_visual;		   /* The visual to be used in creating new
					    *  widgets.
					    */
static GdkColormap *gtk_colormap;	   /* The colormap to be used in creating new
					    *  widgets.
					    */

guint gtk_debug_flags = 0;		   /* Global GTK debug flag */

#ifdef G_ENABLE_DEBUG
static const GDebugKey gtk_debug_keys[] = {
  {"objects", GTK_DEBUG_OBJECTS},
  {"misc", GTK_DEBUG_MISC},
  {"signals", GTK_DEBUG_SIGNALS},
  {"dnd", GTK_DEBUG_DND},
  {"plugsocket", GTK_DEBUG_PLUGSOCKET}
};

static const guint gtk_ndebug_keys = sizeof (gtk_debug_keys) / sizeof (GDebugKey);

#endif /* G_ENABLE_DEBUG */

gchar*
gtk_check_version (guint required_major,
		   guint required_minor,
		   guint required_micro)
{
  if (required_major > GTK_MAJOR_VERSION)
    return "Gtk+ version too old (major mismatch)";
  if (required_major < GTK_MAJOR_VERSION)
    return "Gtk+ version too new (major mismatch)";
  if (required_minor > GTK_MINOR_VERSION)
    return "Gtk+ version too old (minor mismatch)";
  if (required_minor < GTK_MINOR_VERSION)
    return "Gtk+ version too new (minor mismatch)";
  if (required_micro < GTK_MICRO_VERSION - GTK_BINARY_AGE)
    return "Gtk+ version too new (micro mismatch)";
  if (required_micro > GTK_MICRO_VERSION)
    return "Gtk+ version too old (micro mismatch)";
  return NULL;
}


gboolean
gtk_init_check (int	 *argc,
		char   ***argv)
{
  extern void gtk_object_post_arg_parsing_init (void);
  GSList *gtk_modules = NULL;
  GSList *slist;
  gchar *env_string = NULL;

  if (gtk_initialized)
    return TRUE;

#if	0
  g_set_error_handler (gtk_error);
  g_set_warning_handler (gtk_warning);
  g_set_message_handler (gtk_message);
  g_set_print_handler (gtk_print);
#endif
  
  /* Initialize "gdk". We pass along the 'argc' and 'argv'
   *  parameters as they contain information that GDK uses
   */
  if (!gdk_init_check (argc, argv))
    return FALSE;

  gdk_event_handler_set ((GdkEventFunc)gtk_main_do_event, NULL, NULL);
  
#ifdef G_ENABLE_DEBUG
  env_string = getenv ("GTK_DEBUG");
  if (env_string != NULL)
    {
      gtk_debug_flags = g_parse_debug_string (env_string,
					      gtk_debug_keys,
					      gtk_ndebug_keys);
      env_string = NULL;
    }
#endif	/* G_ENABLE_DEBUG */

  env_string = getenv ("GTK_MODULES");
  if (env_string)
    {
      gchar **modules, **as;

      modules = g_strsplit (env_string, ":", -1);
      for (as = modules; *as; as++)
	{
	  if (**as)
	    gtk_modules = g_slist_prepend (gtk_modules, *as);
	  else
	    g_free (*as);
	}
      g_free (modules);
      env_string = NULL;
    }

  if (argc && argv)
    {
      gint i, j, k;
      
      for (i = 1; i < *argc;)
	{
	  if (strcmp ("--gtk-module", (*argv)[i]) == 0 ||
	      strncmp ("--gtk-module=", (*argv)[i], 13) == 0)
	    {
	      gchar *module_name = (*argv)[i] + 12;
	      
	      if (*module_name == '=')
		module_name++;
	      else if (i + 1 < *argc)
		{
		  (*argv)[i] = NULL;
		  i += 1;
		  module_name = (*argv)[i];
		}
	      (*argv)[i] = NULL;

	      if (module_name && *module_name)
		gtk_modules = g_slist_prepend (gtk_modules, g_strdup (module_name));
	    }
	  else if (strcmp ("--g-fatal-warnings", (*argv)[i]) == 0)
	    {
	      GLogLevelFlags fatal_mask;
	      
	      fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
	      fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
              g_log_set_always_fatal (fatal_mask);
	      (*argv)[i] = NULL;
	    }
#ifdef G_ENABLE_DEBUG
	  else if ((strcmp ("--gtk-debug", (*argv)[i]) == 0) ||
		   (strncmp ("--gtk-debug=", (*argv)[i], 12) == 0))
	    {
	      gchar *equal_pos = strchr ((*argv)[i], '=');
	      
	      if (equal_pos != NULL)
		{
		  gtk_debug_flags |= g_parse_debug_string (equal_pos+1,
							   gtk_debug_keys,
							   gtk_ndebug_keys);
		}
	      else if ((i + 1) < *argc && (*argv)[i + 1])
		{
		  gtk_debug_flags |= g_parse_debug_string ((*argv)[i+1],
							   gtk_debug_keys,
							   gtk_ndebug_keys);
		  (*argv)[i] = NULL;
		  i += 1;
		}
	      (*argv)[i] = NULL;
	    }
	  else if ((strcmp ("--gtk-no-debug", (*argv)[i]) == 0) ||
		   (strncmp ("--gtk-no-debug=", (*argv)[i], 15) == 0))
	    {
	      gchar *equal_pos = strchr ((*argv)[i], '=');
	      
	      if (equal_pos != NULL)
		{
		  gtk_debug_flags &= ~g_parse_debug_string (equal_pos+1,
							    gtk_debug_keys,
							    gtk_ndebug_keys);
		}
	      else if ((i + 1) < *argc && (*argv)[i + 1])
		{
		  gtk_debug_flags &= ~g_parse_debug_string ((*argv)[i+1],
							    gtk_debug_keys,
							    gtk_ndebug_keys);
		  (*argv)[i] = NULL;
		  i += 1;
		}
	      (*argv)[i] = NULL;
	    }
#endif /* G_ENABLE_DEBUG */
	  i += 1;
	}
      
      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;
	    }
	}
    }
  
  /* load gtk modules */
  gtk_modules = g_slist_reverse (gtk_modules);
  for (slist = gtk_modules; slist; slist = slist->next)
    {
      gchar *module_name;
      GModule *module = NULL;
      GtkModuleInitFunc modinit_func = NULL;
      
      module_name = slist->data;
      slist->data = NULL;
      if (!(module_name[0] == '/' ||
	    (module_name[0] == 'l' &&
	     module_name[1] == 'i' &&
	     module_name[2] == 'b')))
	{
	  gchar *old = module_name;
	  
	  module_name = g_strconcat ("lib", module_name, ".so", NULL);
	  g_free (old);
	}
      if (g_module_supported ())
	{
	  module = g_module_open (module_name, G_MODULE_BIND_LAZY);
	  if (module &&
	      g_module_symbol (module, "gtk_module_init", (gpointer*) &modinit_func) &&
	      modinit_func)
	    {
	      if (!g_slist_find (gtk_modules, modinit_func))
		{
		  g_module_make_resident (module);
		  slist->data = modinit_func;
		}
	      else
		{
		  g_module_close (module);
		  module = NULL;
		}
	    }
	}
      if (!modinit_func)
	{
	  g_warning ("Failed to load module \"%s\": %s",
		     module ? g_module_name (module) : module_name,
		     g_module_error ());
	  if (module)
	    g_module_close (module);
	}
      g_free (module_name);
    }

#ifdef ENABLE_NLS
  bindtextdomain("gtk+", GTK_LOCALEDIR);
#endif  

  /* Initialize the default visual and colormap to be
   *  used in creating widgets. (We want to use the system
   *  defaults so as to be nice to the colormap).
   */
  gtk_visual = gdk_visual_get_system ();
  gtk_colormap = gdk_colormap_get_system ();

  gtk_type_init ();
  gtk_object_post_arg_parsing_init ();
  gtk_signal_init ();
  gtk_rc_init ();
  
  
  /* Register an exit function to make sure we are able to cleanup.
   */
  g_atexit (gtk_exit_func);
  
  /* Set the 'initialized' flag.
   */
  gtk_initialized = TRUE;

  /* initialize gtk modules
   */
  for (slist = gtk_modules; slist; slist = slist->next)
    {
      if (slist->data)
	{
	  GtkModuleInitFunc modinit;
	  
	  modinit = slist->data;
	  modinit (argc, argv);
	}
    }
  g_slist_free (gtk_modules);

  return TRUE;
}

void
gtk_init (int *argc, char ***argv)
{
  if (!gtk_init_check (argc, argv))
    {
      g_warning ("cannot open display: %s", gdk_get_display ());
      exit(1);
    }
}

void
gtk_exit (int errorcode)
{
  /* Only if "gtk" has been initialized should we de-initialize.
   */
  /* de-initialisation is done by the gtk_exit_funct(),
   * no need to do this here (Alex J.)
   */
  gdk_exit(errorcode);
}

gchar*
gtk_set_locale (void)
{
  return gdk_set_locale ();
}

void
gtk_main (void)
{
  GList *tmp_list;
  GList *functions;
  GtkInitFunction *init;
  GMainLoop *loop;

  gtk_main_loop_level++;
  
  loop = g_main_new (TRUE);
  main_loops = g_slist_prepend (main_loops, loop);

  tmp_list = functions = init_functions;
  init_functions = NULL;
  
  while (tmp_list)
    {
      init = tmp_list->data;
      tmp_list = tmp_list->next;
      
      (* init->function) (init->data);
      g_free (init);
    }
  g_list_free (functions);

  if (g_main_is_running (main_loops->data))
    {
      GDK_THREADS_LEAVE ();
      g_main_run (loop);
      GDK_THREADS_ENTER ();
      gdk_flush ();