reverted marius change to expose the type systems internal type info data

Mon Dec  7 03:08:39 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtktypeutils.h:
        * gtk/gtktypeutils.c: reverted marius change to expose the type systems
        internal type info data to the user. if such functionality is required
        we should provide wrapped accessors, ala gtk_signal_query().

        * gtk/gtksignal.c (gtk_signal_connect_by_type): reverted marius change,
        since it destroys the possibility to implement automatic marshaller
        lookups some day, and it also disables third party code's ability to
        connect to any signal. also the GtkTypeInfo structures are dynamically
        allocated memory portions, so only the type system is really allowed
        to access that stuff.

Mon Dec  7 01:32:18 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtkfilesel.c (gtk_file_selection_key_press): always intercept the
        Tab key on the entry. the focus shouldn't get lost even if completion
        is attempted from an empty entry, since an empty entry string does
        indeed have a valid completion meaning (complete all).
        (gtk_file_selection_init): cast the gchar array parameter in calls to
        gtk_clist_new_with_titles() to quit compiler warnings.
        (check_dir): the no_stat_dirs struct must not be const, since we do
        indeed modify its contents.

        * gtk/testgtk.c (event_watcher): adapted prototype to fit new emission
        hook semantics.

        * gtk/gtksignal.h:
        * gtk/gtksignal.c:
        changed emission allocation, so we don't use a doubly linked list
        but link ourselfs (singly linked).
        changed emission hooks, they get the emision parameters passed as
        well now and are emitted during the actuall signal emission (after
        the RUN_FIRST class method, but prior to RUN_FIRST handlers).
        the existing restrictions do still apply to signal emission hooks,
        i.e. an emission may not be stopped or restarted from an emission hook.
        due to possibly huge perfomance impacts, frequent use of emision hooks
        is also not recommended.
        (gtk_signal_next_and_invalidate): added an
        assertments which explicits what the code assumes anyways: a
        maximum amount of 65535 signals.

        * gtk/gtkcontainer.h: deprecated gtk_container_foreach_interp(),
        gtk_container_foreach_full() should be used instead.

        * gtk/gtkmain.h:
        deprecated gtk_timeout_add_interp and gtk_idle_add_interp, since
        we provide _full variants.

        * gtk/gtksignal.h: deprecated gtk_signal_connect_interp(), we provide
        gtk_signal_connect_full() for long enough now.

1 files changed, 110 insertions, 104 deletions

diff --git a/gtk/gtksignal.c b/gtk/gtksignal.c
index 18f938ae0c..5e52fee3c4 100644
--- a/gtk/gtksignal.c
+++ b/gtk/gtksignal.c
@@ -43,7 +43,7 @@ typedef struct _GtkSignal		GtkSignal;
 typedef struct _GtkSignalHash		GtkSignalHash;
 typedef struct _GtkHandler		GtkHandler;
 typedef struct _GtkEmission		GtkEmission;
-typedef union  _GtkEmissionAllocator	GtkEmissionAllocator;
+typedef struct _GtkEmissionHookData	GtkEmissionHookData;
 typedef struct _GtkDisconnectInfo	GtkDisconnectInfo;
 
 typedef void (*GtkSignalMarshaller0) (GtkObject *object,
@@ -88,14 +88,18 @@ struct _GtkHandler
 
 struct _GtkEmission
 {
-  GtkObject *object;
-  guint	     signal_id;
+  GtkObject   *object;
+  guint16      signal_id;
+  guint	       in_hook : 1;
+  GtkEmission *next;
 };
 
-union _GtkEmissionAllocator
+struct _GtkEmissionHookData
 {
-  GtkEmissionAllocator *next;
-  GtkEmission		emission;
+  GtkObject *object;
+  guint signal_id;
+  guint n_params;
+  GtkArg *params;
 };
 
 struct _GtkDisconnectInfo
@@ -132,13 +136,13 @@ static guint	    gtk_signal_connect_by_type (GtkObject     *object,
 						gint	       no_marshal);
 static guint	    gtk_alive_disconnecter     (GtkDisconnectInfo *info);
 static GtkEmission* gtk_emission_new	       (void);
-static void	    gtk_emission_add	       (GList	      **emissions,
+static void	    gtk_emission_add	       (GtkEmission   **emissions,
 						GtkObject      *object,
 						guint		signal_type);
-static void	    gtk_emission_remove	       (GList	      **emissions,
+static void	    gtk_emission_remove	       (GtkEmission   **emissions,
 						GtkObject      *object,
 						guint		signal_type);
-static gint	    gtk_emission_check	       (GList	       *emissions,
+static gint	    gtk_emission_check	       (GtkEmission    *emissions,
 						GtkObject      *object,
 						guint		signal_type);
 static gint	    gtk_handlers_run	       (GtkHandler     *handlers,
@@ -172,13 +176,13 @@ static guint	   		 gtk_n_signals = 0;
 static GMemChunk   		*gtk_signal_hash_mem_chunk = NULL;
 static GMemChunk   		*gtk_disconnect_info_mem_chunk = NULL;
 static GtkHandler  		*gtk_handler_free_list = NULL;
-static GtkEmissionAllocator	*gtk_emission_free_list = NULL;
+static GtkEmission		*gtk_free_emissions = NULL;
 
 
 
-static GList *current_emissions = NULL;
-static GList *stop_emissions = NULL;
-static GList *restart_emissions = NULL;
+static GtkEmission *current_emissions = NULL;
+static GtkEmission *stop_emissions = NULL;
+static GtkEmission *restart_emissions = NULL;
 
 static GtkSignal*
 gtk_signal_next_and_invalidate (void)
@@ -213,6 +217,8 @@ gtk_signal_next_and_invalidate (void)
   
   new_signal_id = gtk_n_signals++;
   gtk_n_free_signals--;
+
+  g_assert (gtk_n_signals < 65535);
   
   signal = LOOKUP_SIGNAL_ID (new_signal_id);
   if (signal)
@@ -244,7 +250,7 @@ gtk_signal_init (void)
 			 sizeof (GtkDisconnectInfo) * DISCONNECT_INFO_BLOCK_SIZE,
 			 G_ALLOC_AND_FREE);
       gtk_handler_free_list = NULL;
-      gtk_emission_free_list = NULL;
+      gtk_free_emissions = NULL;
       
       gtk_signal_hash_table = g_hash_table_new (gtk_signal_hash,
 						gtk_signal_compare);
@@ -268,6 +274,7 @@ gtk_signal_newv (const gchar	     *r_name,
   gchar *name;
   
   g_return_val_if_fail (r_name != NULL, 0);
+  g_return_val_if_fail (marshaller != NULL, 0);
   g_return_val_if_fail (nparams < MAX_SIGNAL_PARAMS, 0);
   if (nparams)
     g_return_val_if_fail (params != NULL, 0);
@@ -587,10 +594,17 @@ void
 gtk_signal_emit_stop (GtkObject *object,
 		      guint	  signal_id)
 {
+  gint state;
+
   g_return_if_fail (object != NULL);
   g_return_if_fail (signal_id >= 1);
   
-  if (gtk_emission_check (current_emissions, object, signal_id))
+  state = gtk_emission_check (current_emissions, object, signal_id);
+  if (state > 1)
+    g_warning ("gtk_signal_emit_stop(): emission (%u) for object `%s' cannot be stopped from emission hook",
+	       signal_id,
+	       gtk_type_name (GTK_OBJECT_TYPE (object)));
+  else if (state)
     {
       if (!gtk_emission_check (stop_emissions, object, signal_id))
 	gtk_emission_add (&stop_emissions, object, signal_id);
@@ -623,21 +637,16 @@ guint
 gtk_signal_n_emissions (GtkObject  *object,
 			guint	    signal_id)
 {
-  GList *list;
+  GtkEmission *emission;
   guint n;
   
   g_return_val_if_fail (object != NULL, 0);
   g_return_val_if_fail (GTK_IS_OBJECT (object), 0);
   
   n = 0;
-  for (list = current_emissions; list; list = list->next)
+  for (emission = current_emissions; emission; emission = emission->next)
     {
-      GtkEmission *emission;
-      
-      emission = list->data;
-      
-      if ((emission->object == object) &&
-	  (emission->signal_id == signal_id))
+      if (emission->object == object && emission->signal_id == signal_id)
 	n++;
     }
   
@@ -759,6 +768,8 @@ gtk_signal_connect_interp (GtkObject	     *object,
 			   GtkDestroyNotify   destroy_func,
 			   gint		      after)
 {
+  g_message ("gtk_signal_connect_interp() is deprecated");
+
   return gtk_signal_connect_full (object, name, NULL, func,
 				  func_data, destroy_func, FALSE, after);
 }
@@ -1346,16 +1357,10 @@ gtk_signal_real_emit (GtkObject *object,
 		      guint      signal_id,
 		      GtkArg	*params)
 {
-  static guint emission_hooks_called = 0;
   GtkSignal     signal;
   GtkHandler	*handlers;
   GtkSignalFunc  signal_func;
-
-  if (emission_hooks_called)
-    {
-      g_warning ("gtk_signal_real_emit() may not recurse from emission hooks");
-      return;
-    }
+  GtkEmission   *emission;
 
   /* gtk_handlers_run() expects a reentrant GtkSignal*, so we allocate
    * it locally on the stack. we save some lookups ourselves with this as well.
@@ -1376,18 +1381,28 @@ gtk_signal_real_emit (GtkObject *object,
 	       signal_func);
 #endif  /* G_ENABLE_DEBUG */
   
-  if (signal.signal_flags & GTK_RUN_NO_RECURSE &&
-      gtk_emission_check (current_emissions, object, signal_id))
+  if (signal.signal_flags & GTK_RUN_NO_RECURSE)
     {
-      if (!gtk_emission_check (restart_emissions, object, signal_id))
-	gtk_emission_add (&restart_emissions, object, signal_id);
-
-      return;
+      gint state;
+      
+      state = gtk_emission_check (current_emissions, object, signal_id);
+      if (state)
+	{
+	  if (state > 1)
+	    g_warning ("gtk_signal_real_emit(): emission (%u) for object `%s' cannot be restarted from emission hook",
+		       signal_id,
+		       gtk_type_name (GTK_OBJECT_TYPE (object)));
+	  else if (!gtk_emission_check (restart_emissions, object, signal_id))
+	    gtk_emission_add (&restart_emissions, object, signal_id);
+	  
+	  return;
+	}
     }
   
   gtk_object_ref (object);
   
   gtk_emission_add (&current_emissions, object, signal_id);
+  emission = current_emissions;
   
  emission_restart:
   
@@ -1410,6 +1425,19 @@ gtk_signal_real_emit (GtkObject *object,
 	}
     }
   
+  if (signal.hook_list && !GTK_OBJECT_DESTROYED (object))
+    {
+      GtkEmissionHookData data;
+
+      data.object = object;
+      data.n_params = signal.nparams;
+      data.params = params;
+      data.signal_id = signal_id;
+      emission->in_hook = 1;
+      g_hook_list_marshal_check (signal.hook_list, TRUE, gtk_emission_hook_marshaller, &data);
+      emission->in_hook = 0;
+    }
+
   if (GTK_OBJECT_CONNECTED (object))
     {
       handlers = gtk_signal_get_handlers (object, signal_id);
@@ -1475,19 +1503,6 @@ gtk_signal_real_emit (GtkObject *object,
   
   gtk_emission_remove (&current_emissions, object, signal_id);
   
-  /* the hook invokation portion may not be moved!
-   */
-  if (signal.hook_list && !GTK_OBJECT_DESTROYED (object))
-    {
-      gpointer data[2];
-
-      data[0] = &signal;
-      data[1] = object;
-      emission_hooks_called++;
-      g_hook_list_marshal_check (signal.hook_list, TRUE, gtk_emission_hook_marshaller, &data);
-      emission_hooks_called--;
-    }
-
   gtk_object_unref (object);
 }
 
@@ -1646,15 +1661,15 @@ static gboolean
 gtk_emission_hook_marshaller (GHook   *hook,
 			      gpointer data_p)
 {
-  gpointer *data = data_p;
-  GtkSignal *signal;
+  GtkEmissionHookData *data = data_p;
   GtkEmissionHook func;
 
-  signal = data[0];
   func = hook->func;
 
-  if (!GTK_OBJECT_DESTROYED (data[1]))
-    return func (data[1], signal->signal_id, hook->data);
+  if (!GTK_OBJECT_DESTROYED (data->object))
+    return func (data->object, data->signal_id,
+		 data->n_params, data->params,
+		 hook->data);
   else
     return TRUE;
 }
@@ -1677,11 +1692,7 @@ gtk_signal_connect_by_type (GtkObject	    *object,
   g_return_val_if_fail (object != NULL, 0);
   g_return_val_if_fail (object->klass != NULL, 0);
   
-  /* A signal without a default marshaller can only take no_marshal
-     handlers. */
-
   signal = LOOKUP_SIGNAL_ID (signal_id);
-  g_return_val_if_fail (signal->marshaller || no_marshal, 0);
 
   /* Search through the signals for this object and make
    *  sure the one we are adding is valid. We need to perform
@@ -1744,36 +1755,38 @@ gtk_emission_new (void)
 {
   GtkEmission *emission;
   
-  if (!gtk_emission_free_list)
+  if (!gtk_free_emissions)
     {
-      GtkEmissionAllocator *emission_block;
+      GtkEmission *emission_block;
       guint i;
 
-      emission_block = g_new0 (GtkEmissionAllocator, EMISSION_BLOCK_SIZE);
+      emission_block = g_new0 (GtkEmission, EMISSION_BLOCK_SIZE);
       for (i = 1; i < EMISSION_BLOCK_SIZE; i++)
 	{
-	  (emission_block + i)->next = gtk_emission_free_list;
-	  gtk_emission_free_list = (emission_block + i);
+	  (emission_block + i)->next = gtk_free_emissions;
+	  gtk_free_emissions = (emission_block + i);
 	}
 
-      emission = &emission_block->emission;
+      emission = emission_block;
     }
   else
     {
-      emission = &gtk_emission_free_list->emission;
-      gtk_emission_free_list = gtk_emission_free_list->next;
+      emission = gtk_free_emissions;
+      gtk_free_emissions = emission->next;
     }
 
   emission->object = NULL;
   emission->signal_id = 0;
+  emission->in_hook = 0;
+  emission->next = NULL;
   
   return emission;
 }
 
 static void
-gtk_emission_add (GList	    **emissions,
-		  GtkObject  *object,
-		  guint	      signal_id)
+gtk_emission_add (GtkEmission **emissions,
+		  GtkObject    *object,
+		  guint	        signal_id)
 {
   GtkEmission *emission;
   
@@ -1783,58 +1796,51 @@ gtk_emission_add (GList	    **emissions,
   emission = gtk_emission_new ();
   emission->object = object;
   emission->signal_id = signal_id;
-  
-  *emissions = g_list_prepend (*emissions, emission);
+
+  emission->next = *emissions;
+  *emissions = emission;
 }
 
 static void
-gtk_emission_remove (GList     **emissions,
-		     GtkObject	*object,
-		     guint	 signal_id)
+gtk_emission_remove (GtkEmission **emissions,
+		     GtkObject	  *object,
+		     guint	   signal_id)
 {
-  GList *tmp;
+  GtkEmission *emission, *last;
   
   g_return_if_fail (emissions != NULL);
-  
-  tmp = *emissions;
-  while (tmp)
+
+  last = NULL;
+  emission = *emissions;
+  while (emission)
     {
-      GtkEmissionAllocator *ea;
-      
-      ea = tmp->data;
-      
-      if ((ea->emission.object == object) &&
-	  (ea->emission.signal_id == signal_id))
+      if (emission->object == object && emission->signal_id == signal_id)
 	{
-	  *emissions = g_list_remove_link (*emissions, tmp);
-	  g_list_free (tmp);
+	  if (last)
+	    last->next = emission->next;
+	  else
+	    *emissions = emission->next;
 
-	  ea->next = gtk_emission_free_list;
-	  gtk_emission_free_list = ea;
+	  emission->next = gtk_free_emissions;
+	  gtk_free_emissions = emission;
 	  break;
 	}
-      
-      tmp = tmp->next;
+
+      last = emission;
+      emission = last->next;
     }
 }
 
 static gint
-gtk_emission_check (GList     *emissions,
-		    GtkObject *object,
-		    guint      signal_id)
+gtk_emission_check (GtkEmission *emission,
+		    GtkObject   *object,
+		    guint        signal_id)
 {
-  GtkEmission *emission;
-  GList *tmp;
-  
-  tmp = emissions;
-  while (tmp)
+  while (emission)
     {
-      emission = tmp->data;
-      tmp = tmp->next;
-      
-      if ((emission->object == object) &&
-	  (emission->signal_id == signal_id))
-	return TRUE;
+      if (emission->object == object && emission->signal_id == signal_id)
+	return 1 + emission->in_hook;
+      emission = emission->next;
     }
   return FALSE;
 }