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gtk2/gtk/gtkmain.c
Elliot Lee 060978e069 I submitted this patch twice to gtk-devel-list, and received no comments, 
I submitted this patch twice to gtk-devel-list, and received no comments, so
am committing it.  Although not exhaustively tested, I have been using this
gtk+ for a week w/o problems, and I did read the code to ensure that nothing
ever writes to these data structures. If by chance people encounter SEGV's in
gtk+ code that is setting values in global data structures, this patch could
be a possible culprit.

1998-11-30  Elliot Lee  <sopwith@cuc.ml.org>

	* {gdk,gtk}/*.c: Make read-only data structures "static const" to
	allow them to be shared, mainly including (but not limited to) the
	GtkTypeInfo structures for each class.

	* gtk/gtkfilesel.c: Add /net to the "leave me alone" directory listing.
1998-11-30 19:07:15 +00:00

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/* 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.
*/
#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 "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"
/* Private type definitions
*/
typedef struct _GtkInitFunction GtkInitFunction;
typedef struct _GtkQuitFunction GtkQuitFunction;
typedef struct _GtkTimeoutFunction GtkTimeoutFunction;
typedef struct _GtkIdleHook GtkIdleHook;
typedef struct _GtkInputFunction GtkInputFunction;
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 _GtkTimeoutFunction
{
guint tag;
guint32 start;
guint32 interval;
guint32 originterval;
GtkFunction function;
GtkCallbackMarshal marshal;
gpointer data;
GtkDestroyNotify destroy;
};
enum
{
GTK_HOOK_MARSHAL = 1 << (G_HOOK_FLAG_USER_SHIFT)
};
struct _GtkIdleHook
{
GHook hook;
gint priority;
};
#define GTK_IDLE_HOOK(hook) ((GtkIdleHook*) hook)
struct _GtkInputFunction
{
GtkCallbackMarshal callback;
gpointer data;
GtkDestroyNotify destroy;
};
struct _GtkKeySnooperData
{
GtkKeySnoopFunc func;
gpointer func_data;
guint id;
};
static void gtk_exit_func (void);
static void gtk_invoke_hook (GHookList *hook_list,
GHook *hook);
static void gtk_handle_idles (void);
static gboolean gtk_finish_idles (void);
static gint gtk_quit_invoke_function (GtkQuitFunction *quitf);
static void gtk_quit_destroy (GtkQuitFunction *quitf);
static void gtk_timeout_insert (GtkTimeoutFunction *timeoutf);
static void gtk_handle_current_timeouts (guint32 the_time);
static gint gtk_invoke_key_snoopers (GtkWidget *grab_widget,
GdkEvent *event);
static void gtk_handle_timeouts (void);
static void gtk_handle_timer (void);
static void gtk_propagate_event (GtkWidget *widget,
GdkEvent *event);
#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
static gint gtk_timeout_remove_from_list (GList **list,
guint tag,
gint remove_link);
static gint gtk_timeout_compare (gconstpointer a,
gconstpointer b);
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 gboolean iteration_done = FALSE;
static guint gtk_main_loop_level = 0;
static gint gtk_initialized = FALSE;
static GdkEvent *next_event = NULL;
static GList *current_events = NULL;
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.
*/
/* When handling timeouts, the algorithm is to move all of the expired
* timeouts from timeout_functions to current_timeouts then process
* them as a batch. If one of the timeouts recursively calls the main
* loop, then the remainder of the timeouts in current_timeouts will
* be processed before anything else happens.
*
* Each timeout is procesed as follows:
*
* - The timeout is removed from current_timeouts
* - The timeout is pushed on the running_timeouts stack
* - The timeout is executed
* - The timeout stack is popped
* - If the timeout function wasn't removed from the stack while executing,
* and it returned TRUE, it is added back to timeout_functions, otherwise
* it is destroyed if necessary.
*
* gtk_timeout_remove() works by checking for the timeout in
* timeout_functions current_timeouts and running_timeouts. If it is
* found in one of the first two, it is removed and destroyed. If it
* is found in running_timeouts, it is destroyed and ->data is set to
* NULL for the stack entry.
*
* Idle functions work pretty much identically.
*/
static GList *timeout_functions = NULL; /* A list of timeout functions sorted by
* when the length of the time interval
* remaining. Therefore, the first timeout
* function to expire is at the head of
* the list and the last to expire is at
* the tail of the list. */
/* Prioritized idle callbacks */
static GHookList idle_hooks = { 0 };
static GHook *last_idle = NULL;
/* The timeouts that are currently being processed
* by gtk_handle_current_timeouts
*/
static GList *current_timeouts = NULL;
/* A stack of timeouts that is currently being executed
*/
static GList *running_timeouts = NULL;
static GMemChunk *timeout_mem_chunk = NULL;
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}
};
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 to old (major mismatch)";
if (required_major < GTK_MAJOR_VERSION)
return "Gtk+ version to new (major mismatch)";
if (required_minor > GTK_MINOR_VERSION)
return "Gtk+ version to old (minor mismatch)";
if (required_minor < GTK_MINOR_VERSION)
return "Gtk+ version to new (minor mismatch)";
if (required_micro < GTK_MICRO_VERSION - GTK_BINARY_AGE)
return "Gtk+ version to new (micro mismatch)";
if (required_micro > GTK_MICRO_VERSION)
return "Gtk+ version to old (micro mismatch)";
return NULL;
}
gint gtk_use_mb = -1;
void
gtk_init (int *argc,
char ***argv)
{
GSList *gtk_modules = NULL;
GSList *slist;
gchar *current_locale;
gchar *env_string = NULL;
if (gtk_initialized)
return;
#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
*/
gdk_init (argc, argv);
#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
{
(*argv)[i] = NULL;
i += 1;
module_name = (*argv)[i];
}
(*argv)[i] = NULL;
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;
}
}
}
/* Check if there is a good chance the mb functions will handle things
* correctly - set if either mblen("\xc0", MB_CUR_MAX) == 1 in the
* C locale, or we're using X's mb functions. (-DX_LOCALE && locale != C)
*/
current_locale = setlocale (LC_CTYPE, NULL);
#ifdef X_LOCALE
if ((strcmp (current_locale, "C")) && (strcmp (current_locale, "POSIX")))
gtk_use_mb = TRUE;
else
#endif /* X_LOCALE */
{
/* Detect GNU libc, where mb == UTF8. Not useful unless it's
* really a UTF8 locale. The below still probably will
* screw up on Greek, Cyrillic, etc, encoded as UTF8.
*/
wchar_t result;
gtk_use_mb = TRUE;
if ((MB_CUR_MAX == 2) &&
(mbstowcs (&result, "\xdd\xa5", 1) > 0) &&
result == 0x765)
{
if ((strlen (current_locale) < 4) ||
g_strcasecmp (current_locale + strlen(current_locale) - 4, "utf8"))
gtk_use_mb = FALSE;
}
}
GTK_NOTE (MISC,
g_message ("%s multi-byte string functions.",
gtk_use_mb ? "Using" : "Not using"));
/* 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);
}
/* 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_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);
}
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;
int old_done;
gtk_main_loop_level++;
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);
old_done = iteration_done;
while (!gtk_main_iteration ())
;
iteration_done = old_done;
if (quit_functions)
{
GList *reinvoke_list = NULL;
GtkQuitFunction *quitf;
while (quit_functions)
{
quitf = quit_functions->data;
quit_functions = g_list_remove_link (quit_functions, quit_functions);
if ((quitf->main_level && quitf->main_level != gtk_main_loop_level) ||
gtk_quit_invoke_function (quitf))
{
reinvoke_list = g_list_prepend (reinvoke_list, quitf);
}
else
{
g_list_free (tmp_list);
gtk_quit_destroy (quitf);
}
}
if (reinvoke_list)
{
GList *work;
work = g_list_last (reinvoke_list);
if (quit_functions)
quit_functions->prev = work;
work->next = quit_functions;
quit_functions = work;
}
}
gtk_main_loop_level--;
}
guint
gtk_main_level (void)
{
return gtk_main_loop_level;
}
void
gtk_main_quit (void)
{
iteration_done = TRUE;
}
gint
gtk_events_pending (void)
{
gint result = 0;
/* if this function is called from a timeout which will only return
* if gtk needs processor time, we need to take iteration_done==TRUE
* into account as well.
*/
result = iteration_done;
result += next_event != NULL;
result += gdk_events_pending();
result += last_idle != NULL;
result += current_timeouts != NULL;
if (!result)
{
GHook *hook;
hook = g_hook_first_valid (&idle_hooks, FALSE);
result += hook && GTK_IDLE_HOOK (hook)->priority <= GTK_PRIORITY_INTERNAL;
}
if (!result && timeout_functions)
{
guint32 the_time;
GtkTimeoutFunction *timeoutf;
the_time = gdk_time_get ();
timeoutf = timeout_functions->data;
result += timeoutf->interval <= (the_time - timeoutf->start);
}
return result;
}
gint
gtk_main_iteration (void)
{
return gtk_main_iteration_do (TRUE);
}
gint
gtk_main_iteration_do (gboolean blocking)
{
GtkWidget *event_widget;
GtkWidget *grab_widget;
GdkEvent *event = NULL;
GList *tmp_list;
iteration_done = FALSE;
/* If this is a recursive call, and there are pending timeouts or
* idles, finish them, then return immediately to avoid blocking
* in gdk_event_get()
*/
if (current_timeouts)
{
gtk_handle_current_timeouts( gdk_time_get());
if (iteration_done)
gdk_flush ();
return iteration_done;
}
if (last_idle && gtk_finish_idles ())
{
if (iteration_done)
gdk_flush ();
return iteration_done;
}
/* If there is a valid event in 'next_event' then move it to 'event'
*/
if (next_event)
{
event = next_event;
next_event = NULL;
}
/* If we don't have an event then get one.
*/
if (!event)
{
/* Handle setting of the "gdk" timer. If there are no
* timeout functions, then the timer is turned off.
* If there are timeout functions, then the timer is
* set to the shortest timeout interval (which is
* the first timeout function).
*/
gtk_handle_timer ();
if (blocking)
event = gdk_event_get ();
}
/* "gdk_event_get" can return FALSE if the timer goes off
* and no events are pending. Therefore, we should make
* sure that we got an event before continuing.
*/
if (event)
{
/* If there are any events pending then get the next one.
*/
if (gdk_events_pending () > 0)
next_event = gdk_event_get ();
/* Try to compress enter/leave notify events. These event
* pairs occur when the mouse is dragged quickly across
* a window with many buttons (or through a menu). Instead
* of highlighting and de-highlighting each widget that
* is crossed it is better to simply de-highlight the widget
* which contained the mouse initially and highlight the
* widget which ends up containing the mouse.
*/
if (next_event)
if (((event->type == GDK_ENTER_NOTIFY) ||
(event->type == GDK_LEAVE_NOTIFY)) &&
((next_event->type == GDK_ENTER_NOTIFY) ||
(next_event->type == GDK_LEAVE_NOTIFY)) &&
(next_event->type != event->type) &&
(next_event->any.window == event->any.window))
{
gdk_event_free (event);
gdk_event_free (next_event);
next_event = NULL;
goto event_handling_done;
}
/* Find the widget which got the event. We store the widget
* in the user_data field of GdkWindow's.
* Ignore the event if we don't have a widget for it, except
* for GDK_PROPERTY_NOTIFY events which are handled specialy.
* Though this happens rarely, bogus events can occour
* for e.g. destroyed GdkWindows.
*/
event_widget = gtk_get_event_widget (event);
if (!event_widget)
{
/* To handle selection INCR transactions, we select
* PropertyNotify events on the requestor window and create
* a corresponding (fake) GdkWindow so that events get
* here. There won't be a widget though, so we have to handle
* them specially
*/
if (event->type == GDK_PROPERTY_NOTIFY)
gtk_selection_incr_event (event->any.window,
&event->property);
gdk_event_free (event);
goto event_handling_done;
}
/* Push the event onto a stack of current events for
* gtk_current_event_get().
*/
current_events = g_list_prepend (current_events, event);
/* If there is a grab in effect...
*/
if (grabs)
{
grab_widget = grabs->data;
/* If the grab widget is an ancestor of the event widget
* then we send the event to the original event widget.
* This is the key to implementing modality.
*/
if (GTK_WIDGET_IS_SENSITIVE (event_widget) &&
gtk_widget_is_ancestor (event_widget, grab_widget))
grab_widget = event_widget;
}
else
{
grab_widget = event_widget;
}
/* Not all events get sent to the grabbing widget.
* The delete, destroy, expose, focus change and resize
* events still get sent to the event widget because
* 1) these events have no meaning for the grabbing widget
* and 2) redirecting these events to the grabbing widget
* could cause the display to be messed up.
*
* Drag events are also not redirected, since it isn't
* clear what the semantics of that would be.
*/
switch (event->type)
{
case GDK_NOTHING:
break;
case GDK_DELETE:
gtk_widget_ref (event_widget);
if (!gtk_widget_event (event_widget, event) &&
!GTK_OBJECT_DESTROYED (event_widget))
gtk_widget_destroy (event_widget);
gtk_widget_unref (event_widget);
break;
case GDK_DESTROY:
gtk_widget_ref (event_widget);
gtk_widget_event (event_widget, event);
if (!GTK_OBJECT_DESTROYED (event_widget))
gtk_widget_destroy (event_widget);
gtk_widget_unref (event_widget);
break;
case GDK_PROPERTY_NOTIFY:
case GDK_EXPOSE:
case GDK_NO_EXPOSE:
case GDK_FOCUS_CHANGE:
case GDK_CONFIGURE:
case GDK_MAP:
case GDK_UNMAP:
case GDK_SELECTION_CLEAR:
case GDK_SELECTION_REQUEST:
case GDK_SELECTION_NOTIFY:
case GDK_CLIENT_EVENT:
case GDK_VISIBILITY_NOTIFY:
gtk_widget_event (event_widget, event);
break;
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
if (key_snoopers)
{
if (gtk_invoke_key_snoopers (grab_widget, event))
break;
}
/* else fall through */
case GDK_MOTION_NOTIFY:
case GDK_BUTTON_PRESS:
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
case GDK_PROXIMITY_IN:
case GDK_PROXIMITY_OUT:
gtk_propagate_event (grab_widget, event);
break;
case GDK_ENTER_NOTIFY:
if (GTK_WIDGET_IS_SENSITIVE (grab_widget))
{
gtk_widget_event (grab_widget, event);
if (event_widget == grab_widget)
GTK_PRIVATE_SET_FLAG (event_widget, GTK_LEAVE_PENDING);
}
break;
case GDK_LEAVE_NOTIFY:
if (GTK_WIDGET_LEAVE_PENDING (event_widget))
{
GTK_PRIVATE_UNSET_FLAG (event_widget, GTK_LEAVE_PENDING);
gtk_widget_event (event_widget, event);
}
else if (GTK_WIDGET_IS_SENSITIVE (grab_widget))
gtk_widget_event (grab_widget, event);
break;
case GDK_DRAG_STATUS:
case GDK_DROP_FINISHED:
gtk_drag_source_handle_event (event_widget, event);
break;
case GDK_DRAG_ENTER:
case GDK_DRAG_LEAVE:
case GDK_DRAG_MOTION:
case GDK_DROP_START:
gtk_drag_dest_handle_event (event_widget, event);
break;
}
tmp_list = current_events;
current_events = g_list_remove_link (current_events, tmp_list);
g_list_free_1 (tmp_list);
gdk_event_free (event);
}
else
{
if (gdk_events_pending() == 0)
gtk_handle_idles ();
}
event_handling_done:
/* Handle timeout functions that may have expired.
*/
gtk_handle_timeouts ();
if (iteration_done)
gdk_flush ();
return iteration_done;
}
gint
gtk_true (void)
{
return TRUE;
}
gint
gtk_false (void)
{
return FALSE;
}
void
gtk_grab_add (GtkWidget *widget)
{
g_return_if_fail (widget != NULL);
if (!GTK_WIDGET_HAS_GRAB (widget))
{
GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_GRAB);
grabs = g_slist_prepend (grabs, widget);
gtk_widget_ref (widget);
}
}
GtkWidget*
gtk_grab_get_current (void)
{
if (grabs)
return GTK_WIDGET (grabs->data);
return NULL;
}
void
gtk_grab_remove (GtkWidget *widget)
{
g_return_if_fail (widget != NULL);
if (GTK_WIDGET_HAS_GRAB (widget))
{
GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_GRAB);
grabs = g_slist_remove (grabs, widget);
gtk_widget_unref (widget);
}
}
void
gtk_init_add (GtkFunction function,
gpointer data)
{
GtkInitFunction *init;
init = g_new (GtkInitFunction, 1);
init->function = function;
init->data = data;
init_functions = g_list_prepend (init_functions, init);
}
guint
gtk_key_snooper_install (GtkKeySnoopFunc snooper,
gpointer func_data)
{
GtkKeySnooperData *data;
static guint snooper_id = 1;
g_return_val_if_fail (snooper != NULL, 0);
data = g_new (GtkKeySnooperData, 1);
data->func = snooper;
data->func_data = func_data;
data->id = snooper_id++;
key_snoopers = g_slist_prepend (key_snoopers, data);
return data->id;
}
void
gtk_key_snooper_remove (guint snooper_id)
{
GtkKeySnooperData *data = NULL;
GSList *slist;
slist = key_snoopers;
while (slist)
{
data = slist->data;
if (data->id == snooper_id)
break;
slist = slist->next;
data = NULL;
}
if (data)
key_snoopers = g_slist_remove (key_snoopers, data);
}
static gint
gtk_invoke_key_snoopers (GtkWidget *grab_widget,
GdkEvent *event)
{
GSList *slist;
gint return_val = FALSE;
slist = key_snoopers;
while (slist && !return_val)
{
GtkKeySnooperData *data;
data = slist->data;
slist = slist->next;
return_val = (*data->func) (grab_widget, (GdkEventKey*) event, data->func_data);
}
return return_val;
}
guint
gtk_timeout_add_full (guint32 interval,
GtkFunction function,
GtkCallbackMarshal marshal,
gpointer data,
GtkDestroyNotify destroy)
{
static guint timeout_tag = 1;
GtkTimeoutFunction *timeoutf;
g_return_val_if_fail ((function != NULL) || (marshal != NULL), 0);
/* Create a new timeout function structure.
* The start time is the current time.
*/
if (!timeout_mem_chunk)
timeout_mem_chunk = g_mem_chunk_new ("timeout mem chunk", sizeof (GtkTimeoutFunction),
1024, G_ALLOC_AND_FREE);
timeoutf = g_chunk_new (GtkTimeoutFunction, timeout_mem_chunk);
timeoutf->tag = timeout_tag++;
timeoutf->start = gdk_time_get ();
timeoutf->interval = interval;
timeoutf->originterval = interval;
timeoutf->function = function;
timeoutf->marshal = marshal;
timeoutf->data = data;
timeoutf->destroy = destroy;
gtk_timeout_insert (timeoutf);
return timeoutf->tag;
}
static void
gtk_timeout_destroy (GtkTimeoutFunction *timeoutf)
{
if (timeoutf->destroy)
(timeoutf->destroy) (timeoutf->data);
g_mem_chunk_free (timeout_mem_chunk, timeoutf);
}
guint
gtk_timeout_add (guint32 interval,
GtkFunction function,
gpointer data)
{
return gtk_timeout_add_full (interval, function, FALSE, data, NULL);
}
guint
gtk_timeout_add_interp (guint32 interval,
GtkCallbackMarshal function,
gpointer data,
GtkDestroyNotify destroy)
{
return gtk_timeout_add_full (interval, NULL, function, data, destroy);
}
/* Search for the specified tag in a list of timeouts. If it
* is found, destroy the timeout, and either remove the link
* or set link->data to NULL depending on remove_link
*/
static gint
gtk_timeout_remove_from_list (GList **list, guint tag, gint remove_link)
{
GList *tmp_list;
GtkTimeoutFunction *timeoutf;
tmp_list = *list;
while (tmp_list)
{
timeoutf = tmp_list->data;
if (timeoutf->tag == tag)
{
if (remove_link)
{
*list = g_list_remove_link (*list, tmp_list);
g_list_free (tmp_list);
}
else
tmp_list->data = NULL;
gtk_timeout_destroy (timeoutf);
return TRUE;
}
tmp_list = tmp_list->next;
}
return FALSE;
}
void
gtk_timeout_remove (guint tag)
{
/* Remove a timeout function.
* (Which, basically, involves searching the
* list for the tag).
*/
if (gtk_timeout_remove_from_list (&timeout_functions, tag, TRUE))
return;
if (gtk_timeout_remove_from_list (&current_timeouts, tag, TRUE))
return;
if (gtk_timeout_remove_from_list (&running_timeouts, tag, FALSE))
return;
}
guint
gtk_quit_add_full (guint main_level,
GtkFunction function,
GtkCallbackMarshal marshal,
gpointer data,
GtkDestroyNotify destroy)
{
static guint quit_id = 1;
GtkQuitFunction *quitf;
g_return_val_if_fail ((function != NULL) || (marshal != NULL), 0);
if (!quit_mem_chunk)
quit_mem_chunk = g_mem_chunk_new ("quit mem chunk", sizeof (GtkQuitFunction),
512, G_ALLOC_AND_FREE);
quitf = g_chunk_new (GtkQuitFunction, quit_mem_chunk);
quitf->id = quit_id++;
quitf->main_level = main_level;
quitf->function = function;
quitf->marshal = marshal;
quitf->data = data;
quitf->destroy = destroy;
quit_functions = g_list_prepend (quit_functions, quitf);
return quitf->id;
}
gint
gtk_idle_compare (GHook *new_g_hook,
GHook *g_sibling)
{
GtkIdleHook *new_hook = GTK_IDLE_HOOK (new_g_hook);
GtkIdleHook *sibling = GTK_IDLE_HOOK (g_sibling);
/* We add an extra +1 to the comparision result to make sure
* that we get inserted at the end of the list of hooks with
* the same priority.
*/
return new_hook->priority - sibling->priority + 1;
}
guint
gtk_idle_add_full (gint priority,
GtkFunction function,
GtkCallbackMarshal marshal,
gpointer data,
GtkDestroyNotify destroy)
{
GHook *hook;
GtkIdleHook *ihook;
if (function)
g_return_val_if_fail (marshal == NULL, 0);
else
g_return_val_if_fail (marshal != NULL, 0);
if (!idle_hooks.seq_id)
g_hook_list_init (&idle_hooks, sizeof (GtkIdleHook));
hook = g_hook_alloc (&idle_hooks);
ihook = GTK_IDLE_HOOK (hook);
hook->data = data;
if (marshal)
{
hook->flags |= GTK_HOOK_MARSHAL;
hook->func = marshal;
}
else
hook->func = function;
hook->destroy = destroy;
ihook->priority = priority;
/* If we are adding the first idle function, possibly wake up
* the main thread out of its select().
*/
if (!g_hook_first_valid (&idle_hooks, TRUE))
gdk_threads_wake ();
g_hook_insert_sorted (&idle_hooks, hook, gtk_idle_compare);
return hook->hook_id;
}
guint
gtk_idle_add (GtkFunction function,
gpointer data)
{
return gtk_idle_add_full (GTK_PRIORITY_DEFAULT, function, NULL, data, NULL);
}
guint
gtk_idle_add_priority (gint priority,
GtkFunction function,
gpointer data)
{
return gtk_idle_add_full (priority, function, NULL, data, NULL);
}
guint
gtk_idle_add_interp (GtkCallbackMarshal marshal,
gpointer data,
GtkDestroyNotify destroy)
{
return gtk_idle_add_full (GTK_PRIORITY_DEFAULT, NULL, marshal, data, destroy);
}
void
gtk_idle_remove (guint tag)
{
g_return_if_fail (tag > 0);
if (!g_hook_destroy (&idle_hooks, tag))
g_warning ("gtk_idle_remove(%d): no such idle function", tag);
}
void
gtk_idle_remove_by_data (gpointer data)
{
GHook *hook;
hook = g_hook_find_data (&idle_hooks, TRUE, data);
if (hook)
g_hook_destroy_link (&idle_hooks, hook);
else
g_warning ("gtk_idle_remove_by_data(%p): no such idle function", data);
}
static gboolean
gtk_finish_idles (void)
{
gboolean idles_called;
idles_called = FALSE;
while (last_idle)
{
GHook *hook;
hook = g_hook_next_valid (last_idle, FALSE);
if (!hook || GTK_IDLE_HOOK (hook)->priority != GTK_IDLE_HOOK (last_idle)->priority)
{
g_hook_unref (&idle_hooks, last_idle);
last_idle = NULL;
}
else
{
g_hook_unref (&idle_hooks, last_idle);
last_idle = hook;
g_hook_ref (&idle_hooks, last_idle);
idles_called = TRUE;
gtk_invoke_hook (&idle_hooks, last_idle);
}
}
return idles_called;
}
static void
gtk_handle_idles (void)
{
GHook *hook;
/* Caller must already have called gtk_finish_idles() if necessary
*/
g_assert (last_idle == NULL);
hook = g_hook_first_valid (&idle_hooks, FALSE);
if (hook)
{
last_idle = hook;
g_hook_ref (&idle_hooks, last_idle);
gtk_invoke_hook (&idle_hooks, last_idle);
gtk_finish_idles ();
}
}
static void
gtk_invoke_hook (GHookList *hook_list,
GHook *hook)
{
gboolean keep_alive;
if (hook->flags & GTK_HOOK_MARSHAL)
{
GtkArg args[1];
register GtkCallbackMarshal marshal;
keep_alive = FALSE;
args[0].name = NULL;
args[0].type = GTK_TYPE_BOOL;
GTK_VALUE_POINTER (args[0]) = &keep_alive;
marshal = hook->func;
marshal (NULL, hook->data, 0, args);
}
else
{
register GtkFunction func;
func = hook->func;
keep_alive = func (hook->data);
}
if (!keep_alive)
g_hook_destroy_link (hook_list, hook);
}
static gint
gtk_invoke_timeout_function (GtkTimeoutFunction *timeoutf)
{
if (!timeoutf->marshal)
return timeoutf->function (timeoutf->data);
else
{
GtkArg args[1];
gint ret_val = FALSE;
args[0].name = NULL;
args[0].type = GTK_TYPE_BOOL;
args[0].d.pointer_data = &ret_val;
timeoutf->marshal (NULL, timeoutf->data, 0, args);
return ret_val;
}
}
static void
gtk_handle_current_timeouts (guint32 the_time)
{
gint result;
GList *tmp_list;
GtkTimeoutFunction *timeoutf;
while (current_timeouts)
{
tmp_list = current_timeouts;
timeoutf = tmp_list->data;
current_timeouts = g_list_remove_link (current_timeouts, tmp_list);
if (running_timeouts)
{
running_timeouts->prev = tmp_list;
tmp_list->next = running_timeouts;
}
running_timeouts = tmp_list;
result = gtk_invoke_timeout_function (timeoutf);
running_timeouts = g_list_remove_link (running_timeouts, tmp_list);
timeoutf = tmp_list->data;
g_list_free_1 (tmp_list);
if (timeoutf)
{
if (!result)
{
gtk_timeout_destroy (timeoutf);
}
else
{
timeoutf->interval = timeoutf->originterval;
timeoutf->start = the_time;
gtk_timeout_insert (timeoutf);
}
}
}
}
static void
gtk_handle_timeouts (void)
{
guint32 the_time;
GList *tmp_list;
GList *tmp_list2;
GtkTimeoutFunction *timeoutf;
/* Caller must already have called gtk_handle_current_timeouts if
* necessary */
g_assert (current_timeouts == NULL);
if (timeout_functions)
{
the_time = gdk_time_get ();
tmp_list = timeout_functions;
while (tmp_list)
{
timeoutf = tmp_list->data;
if (timeoutf->interval <= (the_time - timeoutf->start))
{
tmp_list2 = tmp_list;
tmp_list = tmp_list->next;
timeout_functions = g_list_remove_link (timeout_functions, tmp_list2);
current_timeouts = g_list_concat (current_timeouts, tmp_list2);
}
else
{
timeoutf->interval -= (the_time - timeoutf->start);
timeoutf->start = the_time;
tmp_list = tmp_list->next;
}
}
if (current_timeouts)
gtk_handle_current_timeouts (the_time);
}
}
static void
gtk_quit_destroy (GtkQuitFunction *quitf)
{
if (quitf->destroy)
quitf->destroy (quitf->data);
g_mem_chunk_free (quit_mem_chunk, quitf);
}
static gint
gtk_quit_destructor (GtkObject **object_p)
{
if (*object_p)
gtk_object_destroy (*object_p);
g_free (object_p);
return FALSE;
}
void
gtk_quit_add_destroy (guint main_level,
GtkObject *object)
{
GtkObject **object_p;
g_return_if_fail (main_level > 0);
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
object_p = g_new (GtkObject*, 1);
*object_p = object;
gtk_signal_connect (object,
"destroy",
GTK_SIGNAL_FUNC (gtk_widget_destroyed),
object_p);
gtk_quit_add (main_level, (GtkFunction) gtk_quit_destructor, object_p);
}
guint
gtk_quit_add (guint main_level,
GtkFunction function,
gpointer data)
{
return gtk_quit_add_full (main_level, function, NULL, data, NULL);
}
void
gtk_quit_remove (guint id)
{
GtkQuitFunction *quitf;
GList *tmp_list;
tmp_list = quit_functions;
while (tmp_list)
{
quitf = tmp_list->data;
if (quitf->id == id)
{
quit_functions = g_list_remove_link (quit_functions, tmp_list);
g_list_free (tmp_list);
gtk_quit_destroy (quitf);
return;
}
tmp_list = tmp_list->next;
}
}
void
gtk_quit_remove_by_data (gpointer data)
{
GtkQuitFunction *quitf;
GList *tmp_list;
tmp_list = quit_functions;
while (tmp_list)
{
quitf = tmp_list->data;
if (quitf->data == data)
{
quit_functions = g_list_remove_link (quit_functions, tmp_list);
g_list_free (tmp_list);
gtk_quit_destroy (quitf);
return;
}
tmp_list = tmp_list->next;
}
}
static void
gtk_invoke_input_function (GtkInputFunction *input,
gint source,
GdkInputCondition condition)
{
GtkArg args[3];
args[0].type = GTK_TYPE_INT;
args[0].name = NULL;
GTK_VALUE_INT(args[0]) = source;
args[1].type = GTK_TYPE_GDK_INPUT_CONDITION;
args[1].name = NULL;
GTK_VALUE_FLAGS(args[1]) = condition;
args[2].type = GTK_TYPE_NONE;
args[2].name = NULL;
input->callback (NULL, input->data, 2, args);
}
static void
gtk_destroy_input_function (GtkInputFunction *input)
{
if (input->destroy)
(input->destroy) (input->data);
g_free (input);
}
guint
gtk_input_add_full (gint source,
GdkInputCondition condition,
GdkInputFunction function,
GtkCallbackMarshal marshal,
gpointer data,
GtkDestroyNotify destroy)
{
if (marshal)
{
GtkInputFunction *input;
input = g_new (GtkInputFunction, 1);
input->callback = marshal;
input->data = data;
input->destroy = destroy;
return gdk_input_add_full (source,
condition,
(GdkInputFunction) gtk_invoke_input_function,
input,
(GdkDestroyNotify) gtk_destroy_input_function);
}
else
return gdk_input_add_full (source, condition, function, data, destroy);
}
void
gtk_input_remove (guint tag)
{
gdk_input_remove (tag);
}
GdkEvent *
gtk_get_current_event (void)
{
if (current_events)
return gdk_event_copy ((GdkEvent *) current_events->data);
else
return NULL;
}
GtkWidget*
gtk_get_event_widget (GdkEvent *event)
{
GtkWidget *widget;
widget = NULL;
if (event && event->any.window)
gdk_window_get_user_data (event->any.window, (void**) &widget);
return widget;
}
static void
gtk_exit_func (void)
{
if (gtk_initialized)
{
gtk_initialized = FALSE;
gtk_preview_uninit ();
}
}
/* We rely on some knowledge of how g_list_insert_sorted works to make
* sure that we insert after timeouts of equal interval
*/
static gint
gtk_timeout_compare (gconstpointer a, gconstpointer b)
{
return (((const GtkTimeoutFunction *)a)->interval <
((const GtkTimeoutFunction *)b)->interval)
? -1 : 1;
}
static void
gtk_timeout_insert (GtkTimeoutFunction *timeoutf)
{
g_assert (timeoutf != NULL);
/* Insert the timeout function appropriately.
* Appropriately meaning sort it into the list
* of timeout functions.
*/
timeout_functions = g_list_insert_sorted (timeout_functions, timeoutf,
gtk_timeout_compare);
}
static gint
gtk_quit_invoke_function (GtkQuitFunction *quitf)
{
if (!quitf->marshal)
return quitf->function (quitf->data);
else
{
GtkArg args[1];
gint ret_val = FALSE;
args[0].name = NULL;
args[0].type = GTK_TYPE_BOOL;
args[0].d.pointer_data = &ret_val;
((GtkCallbackMarshal) quitf->marshal) (NULL,
quitf->data,
0, args);
return ret_val;
}
}
static void
gtk_handle_timer (void)
{
GtkTimeoutFunction *timeoutf;
if (g_hook_first_valid (&idle_hooks, FALSE))
{
gdk_timer_set (0);
gdk_timer_enable ();
}
else if (timeout_functions)
{
timeoutf = timeout_functions->data;
gdk_timer_set (timeoutf->interval);
gdk_timer_enable ();
}
else
{
gdk_timer_set (0);
gdk_timer_disable ();
}
}
static void
gtk_propagate_event (GtkWidget *widget,
GdkEvent *event)
{
gint handled_event;
g_return_if_fail (widget != NULL);
g_return_if_fail (event != NULL);
handled_event = FALSE;
if ((event->type == GDK_KEY_PRESS) ||
(event->type == GDK_KEY_RELEASE))
{
/* Only send key events within Window widgets to the Window
* The Window widget will in turn pass the
* key event on to the currently focused widget
* for that window.
*/
GtkWidget *window;
window = gtk_widget_get_ancestor (widget, gtk_window_get_type ());
if (window)
{
if (GTK_WIDGET_IS_SENSITIVE (window))
gtk_widget_event (window, event);
handled_event = TRUE; /* don't send to widget */
}
}
/* Other events get propagated up the widget tree
* so that parents can see the button and motion
* events of the children.
*/
while (!handled_event && widget)
{
GtkWidget *tmp;
gtk_widget_ref (widget);
handled_event = !GTK_WIDGET_IS_SENSITIVE (widget) || gtk_widget_event (widget, event);
tmp = widget->parent;
gtk_widget_unref (widget);
widget = tmp;
}
}
#if 0
static void
gtk_error (gchar *str)
{
gtk_print (str);
}
static void
gtk_warning (gchar *str)
{
gtk_print (str);
}
static void
gtk_message (gchar *str)
{
gtk_print (str);
}
static void
gtk_print (gchar *str)
{
static GtkWidget *window = NULL;
static GtkWidget *text;
static int level = 0;
GtkWidget *box1;
GtkWidget *box2;
GtkWidget *table;
GtkWidget *hscrollbar;
GtkWidget *vscrollbar;
GtkWidget *separator;
GtkWidget *button;
if (level > 0)
{
fputs (str, stdout);
fflush (stdout);
return;
}
if (!window)
{
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_signal_connect (GTK_OBJECT (window), "destroy",
(GtkSignalFunc) gtk_widget_destroyed,
&window);
gtk_window_set_title (GTK_WINDOW (window), "Messages");
box1 = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), box1);
gtk_widget_show (box1);
box2 = gtk_vbox_new (FALSE, 10);
gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
gtk_widget_show (box2);
table = gtk_table_new (2, 2, FALSE);
gtk_table_set_row_spacing (GTK_TABLE (table), 0, 2);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 2);
gtk_box_pack_start (GTK_BOX (box2), table, TRUE, TRUE, 0);
gtk_widget_show (table);
text = gtk_text_new (NULL, NULL);
gtk_text_set_editable (GTK_TEXT (text), FALSE);
gtk_table_attach_defaults (GTK_TABLE (table), text, 0, 1, 0, 1);
gtk_widget_show (text);
gtk_widget_realize (text);
hscrollbar = gtk_hscrollbar_new (GTK_TEXT (text)->hadj);
gtk_table_attach (GTK_TABLE (table), hscrollbar, 0, 1, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (hscrollbar);
vscrollbar = gtk_vscrollbar_new (GTK_TEXT (text)->vadj);
gtk_table_attach (GTK_TABLE (table), vscrollbar, 1, 2, 0, 1,
GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (vscrollbar);
separator = gtk_hseparator_new ();
gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);
gtk_widget_show (separator);
box2 = gtk_vbox_new (FALSE, 10);
gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);
gtk_widget_show (box2);
button = gtk_button_new_with_label ("close");
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gtk_widget_hide,
GTK_OBJECT (window));
gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_widget_grab_default (button);
gtk_widget_show (button);
}
level += 1;
gtk_text_insert (GTK_TEXT (text), NULL, NULL, NULL, str, -1);
level -= 1;
if (!GTK_WIDGET_VISIBLE (window))
gtk_widget_show (window);
}
#endif
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