gtk2/gtk/gtkaccelerator.c

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1997-11-24 22:37:52 +00:00
/* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ctype.h>
#include "gtkaccelerator.h"
#include "gtksignal.h"
#include "gtkwidget.h"
typedef struct _GtkAcceleratorEntry GtkAcceleratorEntry;
struct _GtkAcceleratorEntry
{
guint8 modifiers;
GtkObject *object;
gint signal_num;
};
static void gtk_accelerator_table_init (GtkAcceleratorTable *table);
static void gtk_accelerator_table_clean (GtkAcceleratorTable *table);
static GtkAcceleratorTable *default_table = NULL;
static GSList *tables = NULL;
static guint8 gtk_accelerator_table_default_mod_mask = ~0;
GtkAcceleratorTable*
gtk_accelerator_table_new ()
{
GtkAcceleratorTable *table;
table = g_new (GtkAcceleratorTable, 1);
gtk_accelerator_table_init (table);
tables = g_slist_prepend (tables, table);
return table;
}
GtkAcceleratorTable*
gtk_accelerator_table_find (GtkObject *object,
const gchar *signal_name,
guchar accelerator_key,
guint8 accelerator_mods)
{
GtkAcceleratorTable *table;
GtkAcceleratorEntry *entry;
GSList *tmp_list;
GList *entries;
gint signal_num;
guint hash;
g_return_val_if_fail (object != NULL, NULL);
g_return_val_if_fail (signal_name != NULL, NULL);
signal_num = gtk_signal_lookup (signal_name, GTK_OBJECT_TYPE (object));
hash = (guint) accelerator_key;
tmp_list = tables;
while (tmp_list)
{
table = tmp_list->data;
tmp_list = tmp_list->next;
entries = table->entries[hash];
while (entries)
{
entry = entries->data;
entries = entries->next;
if ((entry->object == object) &&
(entry->signal_num == signal_num) &&
((entry->modifiers & table->modifier_mask) ==
(accelerator_mods & table->modifier_mask)))
return table;
}
}
return NULL;
}
GtkAcceleratorTable*
gtk_accelerator_table_ref (GtkAcceleratorTable *table)
{
g_return_val_if_fail (table != NULL, NULL);
table->ref_count += 1;
return table;
}
void
gtk_accelerator_table_unref (GtkAcceleratorTable *table)
{
g_return_if_fail (table != NULL);
table->ref_count -= 1;
if (table->ref_count <= 0)
{
tables = g_slist_remove (tables, table);
gtk_accelerator_table_clean (table);
g_free (table);
}
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}
void
gtk_accelerator_table_install (GtkAcceleratorTable *table,
GtkObject *object,
const gchar *signal_name,
guchar accelerator_key,
guint8 accelerator_mods)
{
GtkAcceleratorEntry *entry;
GList *entries;
gchar *signame;
gint signal_num;
guint hash;
g_return_if_fail (object != NULL);
if (!table)
{
if (!default_table)
default_table = gtk_accelerator_table_new ();
table = default_table;
}
signal_num = gtk_signal_lookup (signal_name, GTK_OBJECT_TYPE (object));
g_return_if_fail (signal_num != 0);
hash = (guint) accelerator_key;
entries = table->entries[hash];
while (entries)
{
entry = entries->data;
if ((entry->modifiers & table->modifier_mask) ==
(accelerator_mods & table->modifier_mask))
{
if (GTK_IS_WIDGET (entry->object))
{
signame = gtk_signal_name (entry->signal_num);
gtk_signal_emit_by_name (entry->object,
"remove_accelerator",
signame);
}
entry->modifiers = accelerator_mods;
entry->object = object;
entry->signal_num = signal_num;
return;
}
entries = entries->next;
}
entry = g_new (GtkAcceleratorEntry, 1);
entry->modifiers = accelerator_mods;
entry->object = object;
entry->signal_num = signal_num;
table->entries[hash] = g_list_prepend (table->entries[hash], entry);
}
void
gtk_accelerator_table_remove (GtkAcceleratorTable *table,
GtkObject *object,
const gchar *signal_name)
{
GtkAcceleratorEntry *entry;
GList *entries;
GList *temp_list;
gint signal_num;
gint i;
g_return_if_fail (object != NULL);
if (!table)
{
if (!default_table)
default_table = gtk_accelerator_table_new ();
table = default_table;
}
signal_num = gtk_signal_lookup (signal_name, GTK_OBJECT_TYPE (object));
g_return_if_fail (signal_num != 0);
for (i = 0; i < 256; i++)
{
entries = table->entries[i];
while (entries)
{
entry = entries->data;
if ((entry->object == object) && (entry->signal_num == signal_num))
{
g_free (entry);
temp_list = entries;
if (entries->next)
entries->next->prev = entries->prev;
if (entries->prev)
entries->prev->next = entries->next;
if (table->entries[i] == entries)
table->entries[i] = entries->next;
temp_list->next = NULL;
temp_list->prev = NULL;
g_list_free (temp_list);
return;
}
entries = entries->next;
}
}
}
gint
gtk_accelerator_table_check (GtkAcceleratorTable *table,
const guchar accelerator_key,
guint8 accelerator_mods)
{
GtkAcceleratorEntry *entry;
GList *entries;
guint hash;
if (!table)
{
if (!default_table)
default_table = gtk_accelerator_table_new ();
table = default_table;
}
hash = (guint) accelerator_key;
entries = table->entries[hash];
while (entries)
{
entry = entries->data;
if ((entry->modifiers & table->modifier_mask) ==
(accelerator_mods & table->modifier_mask))
{
gtk_signal_emit (entry->object, entry->signal_num);
return TRUE;
}
entries = entries->next;
}
if (!isupper (hash))
{
hash = toupper (hash);
entries = table->entries[hash];
while (entries)
{
entry = entries->data;
if (((entry->modifiers & table->modifier_mask) ==
(accelerator_mods & table->modifier_mask)) &&
(GTK_IS_WIDGET (entry->object) &&
GTK_WIDGET_SENSITIVE (entry->object)))
{
gtk_signal_emit (entry->object, entry->signal_num);
return TRUE;
}
entries = entries->next;
}
}
return FALSE;
}
void
gtk_accelerator_table_set_mod_mask (GtkAcceleratorTable *table,
guint8 modifier_mask)
{
if (table == NULL)
{
gtk_accelerator_table_default_mod_mask = modifier_mask;
}
else
{
table->modifier_mask = modifier_mask;
}
}
static void
gtk_accelerator_table_init (GtkAcceleratorTable *table)
{
gint i;
g_return_if_fail (table != NULL);
for (i = 0; i < 256; i++)
table->entries[i] = NULL;
table->ref_count = 1;
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table->modifier_mask = gtk_accelerator_table_default_mod_mask;
}
static void
gtk_accelerator_table_clean (GtkAcceleratorTable *table)
{
GtkAcceleratorEntry *entry;
GList *entries;
gint i;
g_return_if_fail (table != NULL);
for (i = 0; i < 256; i++)
{
entries = table->entries[i];
while (entries)
{
entry = entries->data;
entries = entries->next;
g_free (entry);
}
g_list_free (table->entries[i]);
table->entries[i] = NULL;
}
}