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gtk2/gtk/gtkbindings.c
Benjamin Otte 43c212ac28 build: Enable -Wswitch-enum and -Wswitch-default 
This patch makes that work using 1 of 2 options:

1. Add all missing enums to the switch statement
  or
2. Cast the switch argument to a uint to avoid having to do that (mostly
   for GdkEventType).

I even found a bug while doing that: clearing a GtkImage with a surface
did not notify thae surface property.

The reason for enabling this flag even though it is tedious at times is
that it is very useful when adding values to an enum, because it makes
GTK immediately warn about all the switch statements where this enum is
relevant.
And I expect changes to enums to be frequent during the GTK4 development
cycle.
2017-10-06 21:23:39 +02:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* GtkBindingSet: Keybinding manager for GObjects.
* Copyright (C) 1998 Tim Janik
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/*
* 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 <stdarg.h>
#include "gtkbindingsprivate.h"
#include "gtkkeyhash.h"
#include "gtkstylecontext.h"
#include "gtkwidget.h"
#include "gtkintl.h"
/**
* SECTION:gtkbindings
* @Title: Bindings
* @Short_description: Key bindings for individual widgets
* @See_also: Keyboard Accelerators, Mnemonics, #GtkCssProvider
*
* #GtkBindingSet provides a mechanism for configuring GTK+ key bindings
* through CSS files. This eases key binding adjustments for application
* developers as well as users and provides GTK+ users or administrators
* with high key binding configurability which requires no application
* or toolkit side changes.
*
* In order for bindings to work in a custom widget implementation, the
* widget’s #GtkWidget:can-focus and #GtkWidget:has-focus properties
* must both be true. For example, by calling gtk_widget_set_can_focus()
* in the widget’s initialisation function; and by calling
* gtk_widget_grab_focus() when the widget is clicked.
*
* # Installing a key binding
*
* A CSS file binding consists of a “binding-set” definition and a match
* statement to apply the binding set to specific widget types. Details
* on the matching mechanism are described under
* [Selectors][gtkcssprovider-selectors]
* in the #GtkCssProvider documentation. Inside the binding set
* definition, key combinations are bound to one or more specific
* signal emissions on the target widget. Key combinations are strings
* consisting of an optional #GdkModifierType name and
* [key names][gdk3-Keyboard-Handling]
* such as those defined in `gdk/gdkkeysyms.h`
* or returned from gdk_keyval_name(), they have to be parsable by
* gtk_accelerator_parse(). Specifications of signal emissions consist
* of a string identifying the signal name, and a list of signal specific
* arguments in parenthesis.
*
* For example for binding Control and the left or right cursor keys
* of a #GtkEntry widget to the #GtkEntry::move-cursor signal (so
* movement occurs in 3-character steps), the following binding can be
* used:
*
* |[ <!-- language="CSS" -->
* @binding-set MoveCursor3
* {
* bind "<Control>Right" { "move-cursor" (visual-positions, 3, 0) };
* bind "<Control>Left" { "move-cursor" (visual-positions, -3, 0) };
* }
*
* entry
* {
* -gtk-key-bindings: MoveCursor3;
* }
* ]|
*
* # Unbinding existing key bindings
*
* GTK+ already defines a number of useful bindings for the widgets
* it provides. Because custom bindings set up in CSS files take
* precedence over the default bindings shipped with GTK+, overriding
* existing bindings as demonstrated in
* [Installing a key binding][gtk-bindings-install]
* works as expected. The same mechanism can not be used to “unbind”
* existing bindings, however.
*
* |[ <!-- language="CSS" -->
* @binding-set MoveCursor3
* {
* bind "<Control>Right" { };
* bind "<Control>Left" { };
* }
*
* entry
* {
* -gtk-key-bindings: MoveCursor3;
* }
* ]|
*
* The above example will not have the desired effect of causing
* “<Control>Right” and “<Control>Left” key presses to be ignored by GTK+.
* Instead, it just causes any existing bindings from the bindings set
* “MoveCursor3” to be deleted, so when “<Control>Right” or
* “<Control>Left” are pressed, no binding for these keys is found in
* binding set “MoveCursor3”. GTK+ will thus continue to search for
* matching key bindings, and will eventually lookup and find the default
* GTK+ bindings for entries which implement word movement. To keep GTK+
* from activating its default bindings, the “unbind” keyword can be used
* like this:
*
* |[ <!-- language="CSS" -->
* @binding-set MoveCursor3
* {
* unbind "<Control>Right";
* unbind "<Control>Left";
* }
*
* entry
* {
* -gtk-key-bindings: MoveCursor3;
* }
* ]|
*
* Now, GTK+ will find a match when looking up “<Control>Right” and
* “<Control>Left” key presses before it resorts to its default bindings,
* and the match instructs it to abort (“unbind”) the search, so the key
* presses are not consumed by this widget. As usual, further processing
* of the key presses, e.g. by an entry’s parent widget, is now possible.
*/
/* --- defines --- */
#define BINDING_MOD_MASK() (gtk_accelerator_get_default_mod_mask () | GDK_RELEASE_MASK)
#define GTK_TYPE_IDENTIFIER (gtk_identifier_get_type ())
_GDK_EXTERN
GType gtk_identifier_get_type (void) G_GNUC_CONST;
/* --- structures --- */
typedef enum {
GTK_BINDING_TOKEN_BIND,
GTK_BINDING_TOKEN_UNBIND
} GtkBindingTokens;
/* --- variables --- */
static GHashTable *binding_entry_hash_table = NULL;
static GSList *binding_key_hashes = NULL;
static GSList *binding_set_list = NULL;
static const gchar key_class_binding_set[] = "gtk-class-binding-set";
static GQuark key_id_class_binding_set = 0;
/* --- functions --- */
GType
gtk_identifier_get_type (void)
{
static GType our_type = 0;
if (our_type == 0)
{
GTypeInfo tinfo = { 0, };
our_type = g_type_register_static (G_TYPE_STRING, I_("GtkIdentifier"), &tinfo, 0);
}
return our_type;
}
static GtkBindingSignal*
binding_signal_new (const gchar *signal_name,
guint n_args)
{
GtkBindingSignal *signal;
signal = (GtkBindingSignal *) g_slice_alloc0 (sizeof (GtkBindingSignal) + n_args * sizeof (GtkBindingArg));
signal->next = NULL;
signal->signal_name = (gchar *)g_intern_string (signal_name);
signal->n_args = n_args;
signal->args = (GtkBindingArg *)(signal + 1);
return signal;
}
static void
binding_signal_free (GtkBindingSignal *sig)
{
guint i;
for (i = 0; i < sig->n_args; i++)
{
if (G_TYPE_FUNDAMENTAL (sig->args[i].arg_type) == G_TYPE_STRING)
g_free (sig->args[i].d.string_data);
}
g_slice_free1 (sizeof (GtkBindingSignal) + sig->n_args * sizeof (GtkBindingArg), sig);
}
static guint
binding_entry_hash (gconstpointer key)
{
register const GtkBindingEntry *e = key;
register guint h;
h = e->keyval;
h ^= e->modifiers;
return h;
}
static gint
binding_entries_compare (gconstpointer a,
gconstpointer b)
{
register const GtkBindingEntry *ea = a;
register const GtkBindingEntry *eb = b;
return (ea->keyval == eb->keyval && ea->modifiers == eb->modifiers);
}
static void
binding_key_hash_insert_entry (GtkKeyHash *key_hash,
GtkBindingEntry *entry)
{
guint keyval = entry->keyval;
/* We store lowercased accelerators. To deal with this, if <Shift>
* was specified, uppercase.
*/
if (entry->modifiers & GDK_SHIFT_MASK)
{
if (keyval == GDK_KEY_Tab)
keyval = GDK_KEY_ISO_Left_Tab;
else
keyval = gdk_keyval_to_upper (keyval);
}
_gtk_key_hash_add_entry (key_hash, keyval, entry->modifiers & ~GDK_RELEASE_MASK, entry);
}
static void
binding_key_hash_destroy (gpointer data)
{
GtkKeyHash *key_hash = data;
binding_key_hashes = g_slist_remove (binding_key_hashes, key_hash);
_gtk_key_hash_free (key_hash);
}
static void
insert_entries_into_key_hash (gpointer key,
gpointer value,
gpointer data)
{
GtkKeyHash *key_hash = data;
GtkBindingEntry *entry = value;
for (; entry; entry = entry->hash_next)
binding_key_hash_insert_entry (key_hash, entry);
}
static GtkKeyHash *
binding_key_hash_for_keymap (GdkKeymap *keymap)
{
static GQuark key_hash_quark = 0;
GtkKeyHash *key_hash;
if (!key_hash_quark)
key_hash_quark = g_quark_from_static_string ("gtk-binding-key-hash");
key_hash = g_object_get_qdata (G_OBJECT (keymap), key_hash_quark);
if (!key_hash)
{
key_hash = _gtk_key_hash_new (keymap, NULL);
g_object_set_qdata_full (G_OBJECT (keymap), key_hash_quark, key_hash, binding_key_hash_destroy);
if (binding_entry_hash_table)
g_hash_table_foreach (binding_entry_hash_table,
insert_entries_into_key_hash,
key_hash);
binding_key_hashes = g_slist_prepend (binding_key_hashes, key_hash);
}
return key_hash;
}
static GtkBindingEntry*
binding_entry_new (GtkBindingSet *binding_set,
guint keyval,
GdkModifierType modifiers)
{
GSList *tmp_list;
GtkBindingEntry *entry;
if (!binding_entry_hash_table)
binding_entry_hash_table = g_hash_table_new (binding_entry_hash, binding_entries_compare);
entry = g_new (GtkBindingEntry, 1);
entry->keyval = keyval;
entry->modifiers = modifiers;
entry->binding_set = binding_set,
entry->destroyed = FALSE;
entry->in_emission = FALSE;
entry->marks_unbound = FALSE;
entry->signals = NULL;
entry->set_next = binding_set->entries;
binding_set->entries = entry;
entry->hash_next = g_hash_table_lookup (binding_entry_hash_table, entry);
if (entry->hash_next)
g_hash_table_remove (binding_entry_hash_table, entry->hash_next);
g_hash_table_insert (binding_entry_hash_table, entry, entry);
for (tmp_list = binding_key_hashes; tmp_list; tmp_list = tmp_list->next)
{
GtkKeyHash *key_hash = tmp_list->data;
binding_key_hash_insert_entry (key_hash, entry);
}
return entry;
}
static void
binding_entry_free (GtkBindingEntry *entry)
{
GtkBindingSignal *sig;
g_assert (entry->set_next == NULL &&
entry->hash_next == NULL &&
entry->in_emission == FALSE &&
entry->destroyed == TRUE);
entry->destroyed = FALSE;
sig = entry->signals;
while (sig)
{
GtkBindingSignal *prev;
prev = sig;
sig = prev->next;
binding_signal_free (prev);
}
g_free (entry);
}
static void
binding_entry_destroy (GtkBindingEntry *entry)
{
GtkBindingEntry *o_entry;
register GtkBindingEntry *tmp;
GtkBindingEntry *begin;
register GtkBindingEntry *last;
GSList *tmp_list;
/* unlink from binding set
*/
last = NULL;
tmp = entry->binding_set->entries;
while (tmp)
{
if (tmp == entry)
{
if (last)
last->set_next = entry->set_next;
else
entry->binding_set->entries = entry->set_next;
break;
}
last = tmp;
tmp = last->set_next;
}
entry->set_next = NULL;
o_entry = g_hash_table_lookup (binding_entry_hash_table, entry);
begin = o_entry;
last = NULL;
tmp = begin;
while (tmp)
{
if (tmp == entry)
{
if (last)
last->hash_next = entry->hash_next;
else
begin = entry->hash_next;
break;
}
last = tmp;
tmp = last->hash_next;
}
entry->hash_next = NULL;
if (!begin)
g_hash_table_remove (binding_entry_hash_table, entry);
else if (begin != o_entry)
{
g_hash_table_remove (binding_entry_hash_table, entry);
g_hash_table_insert (binding_entry_hash_table, begin, begin);
}
for (tmp_list = binding_key_hashes; tmp_list; tmp_list = tmp_list->next)
{
GtkKeyHash *key_hash = tmp_list->data;
_gtk_key_hash_remove_entry (key_hash, entry);
}
entry->destroyed = TRUE;
if (!entry->in_emission)
binding_entry_free (entry);
}
static GtkBindingEntry*
binding_ht_lookup_entry (GtkBindingSet *set,
guint keyval,
GdkModifierType modifiers)
{
GtkBindingEntry lookup_entry = { 0 };
GtkBindingEntry *entry;
if (!binding_entry_hash_table)
return NULL;
lookup_entry.keyval = keyval;
lookup_entry.modifiers = modifiers;
entry = g_hash_table_lookup (binding_entry_hash_table, &lookup_entry);
for (; entry; entry = entry->hash_next)
if (entry->binding_set == set)
return entry;
return NULL;
}
static gboolean
binding_compose_params (GObject *object,
GtkBindingArg *args,
GSignalQuery *query,
GValue **params_p)
{
GValue *params;
const GType *types;
guint i;
gboolean valid;
params = g_new0 (GValue, query->n_params + 1);
*params_p = params;
/* The instance we emit on is the first object in the array
*/
g_value_init (params, G_TYPE_OBJECT);
g_value_set_object (params, G_OBJECT (object));
params++;
types = query->param_types;
valid = TRUE;
for (i = 1; i < query->n_params + 1 && valid; i++)
{
GValue tmp_value = G_VALUE_INIT;
g_value_init (params, *types);
switch (G_TYPE_FUNDAMENTAL (args->arg_type))
{
case G_TYPE_DOUBLE:
g_value_init (&tmp_value, G_TYPE_DOUBLE);
g_value_set_double (&tmp_value, args->d.double_data);
break;
case G_TYPE_LONG:
g_value_init (&tmp_value, G_TYPE_LONG);
g_value_set_long (&tmp_value, args->d.long_data);
break;
case G_TYPE_STRING:
/* gtk_rc_parse_flags/enum() has fancier parsing for this; we can't call
* that since we don't have a GParamSpec, so just do something simple
*/
if (G_TYPE_FUNDAMENTAL (*types) == G_TYPE_ENUM)
{
GEnumClass *class = G_ENUM_CLASS (g_type_class_ref (*types));
valid = FALSE;
if (args->arg_type == GTK_TYPE_IDENTIFIER)
{
GEnumValue *enum_value = NULL;
enum_value = g_enum_get_value_by_name (class, args->d.string_data);
if (!enum_value)
enum_value = g_enum_get_value_by_nick (class, args->d.string_data);
if (enum_value)
{
g_value_init (&tmp_value, *types);
g_value_set_enum (&tmp_value, enum_value->value);
valid = TRUE;
}
}
g_type_class_unref (class);
}
/* This is just a hack for compatibility with GTK+-1.2 where a string
* could be used for a single flag value / without the support for multiple
* values in gtk_rc_parse_flags(), this isn't very useful.
*/
else if (G_TYPE_FUNDAMENTAL (*types) == G_TYPE_FLAGS)
{
GFlagsClass *class = G_FLAGS_CLASS (g_type_class_ref (*types));
valid = FALSE;
if (args->arg_type == GTK_TYPE_IDENTIFIER)
{
GFlagsValue *flags_value = NULL;
flags_value = g_flags_get_value_by_name (class, args->d.string_data);
if (!flags_value)
flags_value = g_flags_get_value_by_nick (class, args->d.string_data);
if (flags_value)
{
g_value_init (&tmp_value, *types);
g_value_set_flags (&tmp_value, flags_value->value);
valid = TRUE;
}
}
g_type_class_unref (class);
}
else
{
g_value_init (&tmp_value, G_TYPE_STRING);
g_value_set_static_string (&tmp_value, args->d.string_data);
}
break;
default:
valid = FALSE;
break;
}
if (valid)
{
if (!g_value_transform (&tmp_value, params))
valid = FALSE;
g_value_unset (&tmp_value);
}
types++;
params++;
args++;
}
if (!valid)
{
guint j;
for (j = 0; j < i; j++)
g_value_unset (&(*params_p)[j]);
g_free (*params_p);
*params_p = NULL;
}
return valid;
}
static gboolean
gtk_binding_entry_activate (GtkBindingEntry *entry,
GObject *object)
{
GtkBindingSignal *sig;
gboolean old_emission;
gboolean handled = FALSE;
gint i;
old_emission = entry->in_emission;
entry->in_emission = TRUE;
g_object_ref (object);
for (sig = entry->signals; sig; sig = sig->next)
{
GSignalQuery query;
guint signal_id;
GValue *params = NULL;
GValue return_val = G_VALUE_INIT;
gchar *accelerator = NULL;
signal_id = g_signal_lookup (sig->signal_name, G_OBJECT_TYPE (object));
if (!signal_id)
{
accelerator = gtk_accelerator_name (entry->keyval, entry->modifiers);
g_warning ("gtk_binding_entry_activate(): binding \"%s::%s\": "
"could not find signal \"%s\" in the '%s' class ancestry",
entry->binding_set->set_name,
accelerator,
sig->signal_name,
g_type_name (G_OBJECT_TYPE (object)));
g_free (accelerator);
continue;
}
g_signal_query (signal_id, &query);
if (query.n_params != sig->n_args ||
(query.return_type != G_TYPE_NONE && query.return_type != G_TYPE_BOOLEAN) ||
!binding_compose_params (object, sig->args, &query, &params))
{
accelerator = gtk_accelerator_name (entry->keyval, entry->modifiers);
g_warning ("gtk_binding_entry_activate(): binding \"%s::%s\": "
"signature mismatch for signal \"%s\" in the '%s' class ancestry",
entry->binding_set->set_name,
accelerator,
sig->signal_name,
g_type_name (G_OBJECT_TYPE (object)));
}
else if (!(query.signal_flags & G_SIGNAL_ACTION))
{
accelerator = gtk_accelerator_name (entry->keyval, entry->modifiers);
g_warning ("gtk_binding_entry_activate(): binding \"%s::%s\": "
"signal \"%s\" in the '%s' class ancestry cannot be used for action emissions",
entry->binding_set->set_name,
accelerator,
sig->signal_name,
g_type_name (G_OBJECT_TYPE (object)));
}
g_free (accelerator);
if (accelerator)
continue;
if (query.return_type == G_TYPE_BOOLEAN)
g_value_init (&return_val, G_TYPE_BOOLEAN);
g_signal_emitv (params, signal_id, 0, &return_val);
if (query.return_type == G_TYPE_BOOLEAN)
{
if (g_value_get_boolean (&return_val))
handled = TRUE;
g_value_unset (&return_val);
}
else
handled = TRUE;
if (params != NULL)
{
for (i = 0; i < query.n_params + 1; i++)
g_value_unset (&params[i]);
g_free (params);
}
if (entry->destroyed)
break;
}
g_object_unref (object);
entry->in_emission = old_emission;
if (entry->destroyed && !entry->in_emission)
binding_entry_free (entry);
return handled;
}
/**
* gtk_binding_set_new: (skip)
* @set_name: unique name of this binding set
*
* GTK+ maintains a global list of binding sets. Each binding set has
* a unique name which needs to be specified upon creation.
*
* Returns: (transfer none): new binding set
*/
GtkBindingSet*
gtk_binding_set_new (const gchar *set_name)
{
GtkBindingSet *binding_set;
g_return_val_if_fail (set_name != NULL, NULL);
binding_set = g_new (GtkBindingSet, 1);
binding_set->set_name = (gchar *) g_intern_string (set_name);
binding_set->widget_path_pspecs = NULL;
binding_set->widget_class_pspecs = NULL;
binding_set->class_branch_pspecs = NULL;
binding_set->entries = NULL;
binding_set->current = NULL;
binding_set->parsed = FALSE;
binding_set_list = g_slist_prepend (binding_set_list, binding_set);
return binding_set;
}
/**
* gtk_binding_set_by_class: (skip)
* @object_class: a valid #GObject class
*
* This function returns the binding set named after the type name of
* the passed in class structure. New binding sets are created on
* demand by this function.
*
* Returns: (transfer none): the binding set corresponding to
* @object_class
*/
GtkBindingSet*
gtk_binding_set_by_class (gpointer object_class)
{
GObjectClass *class = object_class;
GtkBindingSet* binding_set;
g_return_val_if_fail (G_IS_OBJECT_CLASS (class), NULL);
if (!key_id_class_binding_set)
key_id_class_binding_set = g_quark_from_static_string (key_class_binding_set);
binding_set = g_dataset_id_get_data (class, key_id_class_binding_set);
if (binding_set)
return binding_set;
binding_set = gtk_binding_set_new (g_type_name (G_OBJECT_CLASS_TYPE (class)));
g_dataset_id_set_data (class, key_id_class_binding_set, binding_set);
return binding_set;
}
static GtkBindingSet*
gtk_binding_set_find_interned (const gchar *set_name)
{
GSList *slist;
for (slist = binding_set_list; slist; slist = slist->next)
{
GtkBindingSet *binding_set;
binding_set = slist->data;
if (binding_set->set_name == set_name)
return binding_set;
}
return NULL;
}
/**
* gtk_binding_set_find:
* @set_name: unique binding set name
*
* Find a binding set by its globally unique name.
*
* The @set_name can either be a name used for gtk_binding_set_new()
* or the type name of a class used in gtk_binding_set_by_class().
*
* Returns: (nullable) (transfer none): %NULL or the specified binding set
*/
GtkBindingSet*
gtk_binding_set_find (const gchar *set_name)
{
g_return_val_if_fail (set_name != NULL, NULL);
return gtk_binding_set_find_interned (g_intern_string (set_name));
}
/**
* gtk_binding_set_activate:
* @binding_set: a #GtkBindingSet set to activate
* @keyval: key value of the binding
* @modifiers: key modifier of the binding
* @object: object to activate when binding found
*
* Find a key binding matching @keyval and @modifiers within
* @binding_set and activate the binding on @object.
*
* Returns: %TRUE if a binding was found and activated
*/
gboolean
gtk_binding_set_activate (GtkBindingSet *binding_set,
guint keyval,
GdkModifierType modifiers,
GObject *object)
{
GtkBindingEntry *entry;
g_return_val_if_fail (binding_set != NULL, FALSE);
g_return_val_if_fail (G_IS_OBJECT (object), FALSE);
keyval = gdk_keyval_to_lower (keyval);
modifiers = modifiers & BINDING_MOD_MASK ();
entry = binding_ht_lookup_entry (binding_set, keyval, modifiers);
if (entry)
return gtk_binding_entry_activate (entry, object);
return FALSE;
}
static void
gtk_binding_entry_clear_internal (GtkBindingSet *binding_set,
guint keyval,
GdkModifierType modifiers)
{
GtkBindingEntry *entry;
keyval = gdk_keyval_to_lower (keyval);
modifiers = modifiers & BINDING_MOD_MASK ();
entry = binding_ht_lookup_entry (binding_set, keyval, modifiers);
if (entry)
binding_entry_destroy (entry);
entry = binding_entry_new (binding_set, keyval, modifiers);
}
/**
* gtk_binding_entry_skip:
* @binding_set: a #GtkBindingSet to skip an entry of
* @keyval: key value of binding to skip
* @modifiers: key modifier of binding to skip
*
* Install a binding on @binding_set which causes key lookups
* to be aborted, to prevent bindings from lower priority sets
* to be activated.
*
* Since: 2.12
*/
void
gtk_binding_entry_skip (GtkBindingSet *binding_set,
guint keyval,
GdkModifierType modifiers)
{
GtkBindingEntry *entry;
g_return_if_fail (binding_set != NULL);
keyval = gdk_keyval_to_lower (keyval);
modifiers = modifiers & BINDING_MOD_MASK ();
entry = binding_ht_lookup_entry (binding_set, keyval, modifiers);
if (entry)
binding_entry_destroy (entry);
entry = binding_entry_new (binding_set, keyval, modifiers);
entry->marks_unbound = TRUE;
}
/**
* gtk_binding_entry_remove:
* @binding_set: a #GtkBindingSet to remove an entry of
* @keyval: key value of binding to remove
* @modifiers: key modifier of binding to remove
*
* Remove a binding previously installed via
* gtk_binding_entry_add_signal() on @binding_set.
*/
void
gtk_binding_entry_remove (GtkBindingSet *binding_set,
guint keyval,
GdkModifierType modifiers)
{
GtkBindingEntry *entry;
g_return_if_fail (binding_set != NULL);
keyval = gdk_keyval_to_lower (keyval);
modifiers = modifiers & BINDING_MOD_MASK ();
entry = binding_ht_lookup_entry (binding_set, keyval, modifiers);
if (entry)
binding_entry_destroy (entry);
}
/**
* gtk_binding_entry_add_signall:
* @binding_set: a #GtkBindingSet to add a signal to
* @keyval: key value
* @modifiers: key modifier
* @signal_name: signal name to be bound
* @binding_args: (transfer none) (element-type GtkBindingArg):
* list of #GtkBindingArg signal arguments
*
* Override or install a new key binding for @keyval with @modifiers on
* @binding_set.
*/
void
gtk_binding_entry_add_signall (GtkBindingSet *binding_set,
guint keyval,
GdkModifierType modifiers,
const gchar *signal_name,
GSList *binding_args)
{
_gtk_binding_entry_add_signall (binding_set,
keyval, modifiers,
signal_name, binding_args);
}
void
_gtk_binding_entry_add_signall (GtkBindingSet *binding_set,
guint keyval,
GdkModifierType modifiers,
const gchar *signal_name,
GSList *binding_args)
{
GtkBindingEntry *entry;
GtkBindingSignal *signal, **signal_p;
GSList *slist;
guint n = 0;
GtkBindingArg *arg;
g_return_if_fail (binding_set != NULL);
g_return_if_fail (signal_name != NULL);
keyval = gdk_keyval_to_lower (keyval);
modifiers = modifiers & BINDING_MOD_MASK ();
signal = binding_signal_new (signal_name, g_slist_length (binding_args));
arg = signal->args;
for (slist = binding_args; slist; slist = slist->next)
{
GtkBindingArg *tmp_arg;
tmp_arg = slist->data;
if (!tmp_arg)
{
g_warning ("gtk_binding_entry_add_signall(): arg[%u] is 'NULL'", n);
binding_signal_free (signal);
return;
}
switch (G_TYPE_FUNDAMENTAL (tmp_arg->arg_type))
{
case G_TYPE_LONG:
arg->arg_type = G_TYPE_LONG;
arg->d.long_data = tmp_arg->d.long_data;
break;
case G_TYPE_DOUBLE:
arg->arg_type = G_TYPE_DOUBLE;
arg->d.double_data = tmp_arg->d.double_data;
break;
case G_TYPE_STRING:
if (tmp_arg->arg_type != GTK_TYPE_IDENTIFIER)
arg->arg_type = G_TYPE_STRING;
else
arg->arg_type = GTK_TYPE_IDENTIFIER;
arg->d.string_data = g_strdup (tmp_arg->d.string_data);
if (!arg->d.string_data)
{
g_warning ("gtk_binding_entry_add_signall(): value of 'string' arg[%u] is 'NULL'", n);
binding_signal_free (signal);
return;
}
break;
default:
g_warning ("gtk_binding_entry_add_signall(): unsupported type '%s' for arg[%u]",
g_type_name (arg->arg_type), n);
binding_signal_free (signal);
return;
}
arg++;
n++;
}
entry = binding_ht_lookup_entry (binding_set, keyval, modifiers);
if (!entry)
{
gtk_binding_entry_clear_internal (binding_set, keyval, modifiers);
entry = binding_ht_lookup_entry (binding_set, keyval, modifiers);
}
signal_p = &entry->signals;
while (*signal_p)
signal_p = &(*signal_p)->next;
*signal_p = signal;
}
/**
* gtk_binding_entry_add_signal:
* @binding_set: a #GtkBindingSet to install an entry for
* @keyval: key value of binding to install
* @modifiers: key modifier of binding to install
* @signal_name: signal to execute upon activation
* @n_args: number of arguments to @signal_name
* @...: arguments to @signal_name
*
* Override or install a new key binding for @keyval with @modifiers on
* @binding_set. When the binding is activated, @signal_name will be
* emitted on the target widget, with @n_args @Varargs used as
* arguments.
*
* Each argument to the signal must be passed as a pair of varargs: the
* #GType of the argument, followed by the argument value (which must
* be of the given type). There must be @n_args pairs in total.
*
* ## Adding a Key Binding
*
* |[<!-- language="C" -->
* gtk_binding_entry_add_signal (binding_set, keyval, modmask,
* "move-cursor", 3,
* G_TYPE_ENUM, step,
* G_TYPE_INT, count,
* G_TYPE_BOOLEAN, FALSE);
* ]|
*/
void
gtk_binding_entry_add_signal (GtkBindingSet *binding_set,
guint keyval,
GdkModifierType modifiers,
const gchar *signal_name,
guint n_args,
...)
{
GSList *slist, *free_slist;
va_list args;
guint i;
g_return_if_fail (binding_set != NULL);
g_return_if_fail (signal_name != NULL);
va_start (args, n_args);
slist = NULL;
for (i = 0; i < n_args; i++)
{
GtkBindingArg *arg;
arg = g_slice_new0 (GtkBindingArg);
slist = g_slist_prepend (slist, arg);
arg->arg_type = va_arg (args, GType);
switch (G_TYPE_FUNDAMENTAL (arg->arg_type))
{
case G_TYPE_CHAR:
case G_TYPE_UCHAR:
case G_TYPE_INT:
case G_TYPE_UINT:
case G_TYPE_BOOLEAN:
case G_TYPE_ENUM:
case G_TYPE_FLAGS:
arg->arg_type = G_TYPE_LONG;
arg->d.long_data = va_arg (args, gint);
break;
case G_TYPE_LONG:
case G_TYPE_ULONG:
arg->arg_type = G_TYPE_LONG;
arg->d.long_data = va_arg (args, glong);
break;
case G_TYPE_FLOAT:
case G_TYPE_DOUBLE:
arg->arg_type = G_TYPE_DOUBLE;
arg->d.double_data = va_arg (args, gdouble);
break;
case G_TYPE_STRING:
if (arg->arg_type != GTK_TYPE_IDENTIFIER)
arg->arg_type = G_TYPE_STRING;
arg->d.string_data = va_arg (args, gchar*);
if (!arg->d.string_data)
{
g_warning ("gtk_binding_entry_add_signal(): type '%s' arg[%u] is 'NULL'",
g_type_name (arg->arg_type),
i);
i += n_args + 1;
}
break;
default:
g_warning ("gtk_binding_entry_add_signal(): unsupported type '%s' for arg[%u]",
g_type_name (arg->arg_type), i);
i += n_args + 1;
break;
}
}
va_end (args);
if (i == n_args || i == 0)
{
slist = g_slist_reverse (slist);
_gtk_binding_entry_add_signall (binding_set, keyval, modifiers, signal_name, slist);
}
free_slist = slist;
while (slist)
{
g_slice_free (GtkBindingArg, slist->data);
slist = slist->next;
}
g_slist_free (free_slist);
}
static guint
gtk_binding_parse_signal (GScanner *scanner,
GtkBindingSet *binding_set,
guint keyval,
GdkModifierType modifiers)
{
gchar *signal;
guint expected_token = 0;
GSList *args;
GSList *slist;
gboolean done;
gboolean negate;
gboolean need_arg;
gboolean seen_comma;
g_return_val_if_fail (scanner != NULL, G_TOKEN_ERROR);
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_STRING)
return G_TOKEN_STRING;
g_scanner_peek_next_token (scanner);
if (scanner->next_token != '(')
{
g_scanner_get_next_token (scanner);
return '(';
}
signal = g_strdup (scanner->value.v_string);
g_scanner_get_next_token (scanner);
negate = FALSE;
args = NULL;
done = FALSE;
need_arg = TRUE;
seen_comma = FALSE;
scanner->config->scan_symbols = FALSE;
do
{
GtkBindingArg *arg;
if (need_arg)
expected_token = G_TOKEN_INT;
else
expected_token = ')';
g_scanner_get_next_token (scanner);
switch ((guint) scanner->token)
{
case G_TOKEN_FLOAT:
if (need_arg)
{
need_arg = FALSE;
arg = g_new (GtkBindingArg, 1);
arg->arg_type = G_TYPE_DOUBLE;
arg->d.double_data = scanner->value.v_float;
if (negate)
{
arg->d.double_data = - arg->d.double_data;
negate = FALSE;
}
args = g_slist_prepend (args, arg);
}
else
done = TRUE;
break;
case G_TOKEN_INT:
if (need_arg)
{
need_arg = FALSE;
arg = g_new (GtkBindingArg, 1);
arg->arg_type = G_TYPE_LONG;
arg->d.long_data = scanner->value.v_int;
if (negate)
{
arg->d.long_data = - arg->d.long_data;
negate = FALSE;
}
args = g_slist_prepend (args, arg);
}
else
done = TRUE;
break;
case G_TOKEN_STRING:
if (need_arg && !negate)
{
need_arg = FALSE;
arg = g_new (GtkBindingArg, 1);
arg->arg_type = G_TYPE_STRING;
arg->d.string_data = g_strdup (scanner->value.v_string);
args = g_slist_prepend (args, arg);
}
else
done = TRUE;
break;
case G_TOKEN_IDENTIFIER:
if (need_arg && !negate)
{
need_arg = FALSE;
arg = g_new (GtkBindingArg, 1);
arg->arg_type = GTK_TYPE_IDENTIFIER;
arg->d.string_data = g_strdup (scanner->value.v_identifier);
args = g_slist_prepend (args, arg);
}
else
done = TRUE;
break;
case '-':
if (!need_arg)
done = TRUE;
else if (negate)
{
expected_token = G_TOKEN_INT;
done = TRUE;
}
else
negate = TRUE;
break;
case ',':
seen_comma = TRUE;
if (need_arg)
done = TRUE;
else
need_arg = TRUE;
break;
case ')':
if (!(need_arg && seen_comma) && !negate)
{
args = g_slist_reverse (args);
_gtk_binding_entry_add_signall (binding_set,
keyval,
modifiers,
signal,
args);
expected_token = G_TOKEN_NONE;
}
done = TRUE;
break;
default:
done = TRUE;
break;
}
}
while (!done);
scanner->config->scan_symbols = TRUE;
for (slist = args; slist; slist = slist->next)
{
GtkBindingArg *arg;
arg = slist->data;
if (G_TYPE_FUNDAMENTAL (arg->arg_type) == G_TYPE_STRING)
g_free (arg->d.string_data);
g_free (arg);
}
g_slist_free (args);
g_free (signal);
return expected_token;
}
static inline guint
gtk_binding_parse_bind (GScanner *scanner,
GtkBindingSet *binding_set)
{
guint keyval = 0;
GdkModifierType modifiers = 0;
gboolean unbind = FALSE;
g_return_val_if_fail (scanner != NULL, G_TOKEN_ERROR);
g_scanner_get_next_token (scanner);
if (scanner->token != G_TOKEN_SYMBOL)
return G_TOKEN_SYMBOL;
if (scanner->value.v_symbol != GUINT_TO_POINTER (GTK_BINDING_TOKEN_BIND) &&
scanner->value.v_symbol != GUINT_TO_POINTER (GTK_BINDING_TOKEN_UNBIND))
return G_TOKEN_SYMBOL;
unbind = (scanner->value.v_symbol == GUINT_TO_POINTER (GTK_BINDING_TOKEN_UNBIND));
g_scanner_get_next_token (scanner);
if (scanner->token != (guint) G_TOKEN_STRING)
return G_TOKEN_STRING;
gtk_accelerator_parse (scanner->value.v_string, &keyval, &modifiers);
modifiers &= BINDING_MOD_MASK ();
if (keyval == 0)
return G_TOKEN_STRING;
if (unbind)
{
gtk_binding_entry_skip (binding_set, keyval, modifiers);
return G_TOKEN_NONE;
}
g_scanner_get_next_token (scanner);
if (scanner->token != '{')
return '{';
gtk_binding_entry_clear_internal (binding_set, keyval, modifiers);
g_scanner_peek_next_token (scanner);
while (scanner->next_token != '}')
{
guint expected_token;
if (scanner->next_token == G_TOKEN_STRING)
{
expected_token = gtk_binding_parse_signal (scanner,
binding_set,
keyval,
modifiers);
if (expected_token != G_TOKEN_NONE)
return expected_token;
}
else
{
g_scanner_get_next_token (scanner);
return '}';
}
g_scanner_peek_next_token (scanner);
}
g_scanner_get_next_token (scanner);
return G_TOKEN_NONE;
}
static GScanner *
create_signal_scanner (void)
{
GScanner *scanner;
scanner = g_scanner_new (NULL);
scanner->config->cset_identifier_nth = (char *) G_CSET_a_2_z G_CSET_A_2_Z G_CSET_DIGITS "-_";
g_scanner_scope_add_symbol (scanner, 0, "bind", GUINT_TO_POINTER (GTK_BINDING_TOKEN_BIND));
g_scanner_scope_add_symbol (scanner, 0, "unbind", GUINT_TO_POINTER (GTK_BINDING_TOKEN_UNBIND));
g_scanner_set_scope (scanner, 0);
return scanner;
}
/**
* gtk_binding_entry_add_signal_from_string:
* @binding_set: a #GtkBindingSet
* @signal_desc: a signal description
*
* Parses a signal description from @signal_desc and incorporates
* it into @binding_set.
*
* Signal descriptions may either bind a key combination to
* one or more signals:
* |[
* bind "key" {
* "signalname" (param, ...)
* ...
* }
* ]|
*
* Or they may also unbind a key combination:
* |[
* unbind "key"
* ]|
*
* Key combinations must be in a format that can be parsed by
* gtk_accelerator_parse().
*
* Returns: %G_TOKEN_NONE if the signal was successfully parsed and added,
* the expected token otherwise
*
* Since: 3.0
*/
GTokenType
gtk_binding_entry_add_signal_from_string (GtkBindingSet *binding_set,
const gchar *signal_desc)
{
static GScanner *scanner = NULL;
GTokenType ret;
g_return_val_if_fail (binding_set != NULL, G_TOKEN_NONE);
g_return_val_if_fail (signal_desc != NULL, G_TOKEN_NONE);
if (G_UNLIKELY (!scanner))
scanner = create_signal_scanner ();
g_scanner_input_text (scanner, signal_desc,
(guint) strlen (signal_desc));
ret = gtk_binding_parse_bind (scanner, binding_set);
/* Reset for next use */
g_scanner_set_scope (scanner, 0);
return ret;
}
static gint
find_entry_with_binding (GtkBindingEntry *entry,
GtkBindingSet *binding_set)
{
return (entry->binding_set == binding_set) ? 0 : 1;
}
static gboolean
binding_activate (GtkBindingSet *binding_set,
GSList *entries,
GObject *object,
gboolean is_release,
gboolean *unbound)
{
GtkBindingEntry *entry;
GSList *elem;
elem = g_slist_find_custom (entries, binding_set,
(GCompareFunc) find_entry_with_binding);
if (!elem)
return FALSE;
entry = elem->data;
if (is_release != ((entry->modifiers & GDK_RELEASE_MASK) != 0))
return FALSE;
if (entry->marks_unbound)
{
*unbound = TRUE;
return FALSE;
}
if (gtk_binding_entry_activate (entry, object))
return TRUE;
return FALSE;
}
static gboolean
gtk_bindings_activate_list (GObject *object,
GSList *entries,
gboolean is_release)
{
GtkStyleContext *context;
GtkBindingSet *binding_set;
gboolean handled = FALSE;
gboolean unbound = FALSE;
GPtrArray *array;
if (!entries)
return FALSE;
context = gtk_widget_get_style_context (GTK_WIDGET (object));
gtk_style_context_get (context,
"-gtk-key-bindings", &array,
NULL);
if (array)
{
gint i;
for (i = 0; i < array->len; i++)
{
binding_set = g_ptr_array_index (array, i);
handled = binding_activate (binding_set, entries,
object, is_release,
&unbound);
if (handled || unbound)
break;
}
g_ptr_array_unref (array);
if (unbound)
return FALSE;
}
if (!handled)
{
GType class_type;
class_type = G_TYPE_FROM_INSTANCE (object);
while (class_type && !handled)
{
binding_set = gtk_binding_set_find_interned (g_type_name (class_type));
class_type = g_type_parent (class_type);
if (!binding_set)
continue;
handled = binding_activate (binding_set, entries,
object, is_release,
&unbound);
if (unbound)
break;
}
if (unbound)
return FALSE;
}
return handled;
}
/**
* gtk_bindings_activate:
* @object: object to activate when binding found
* @keyval: key value of the binding
* @modifiers: key modifier of the binding
*
* Find a key binding matching @keyval and @modifiers and activate the
* binding on @object.
*
* Returns: %TRUE if a binding was found and activated
*/
gboolean
gtk_bindings_activate (GObject *object,
guint keyval,
GdkModifierType modifiers)
{
GSList *entries = NULL;
GdkDisplay *display;
GtkKeyHash *key_hash;
gboolean handled = FALSE;
gboolean is_release;
if (!GTK_IS_WIDGET (object))
return FALSE;
is_release = (modifiers & GDK_RELEASE_MASK) != 0;
modifiers = modifiers & BINDING_MOD_MASK () & ~GDK_RELEASE_MASK;
display = gtk_widget_get_display (GTK_WIDGET (object));
key_hash = binding_key_hash_for_keymap (gdk_keymap_get_for_display (display));
entries = _gtk_key_hash_lookup_keyval (key_hash, keyval, modifiers);
handled = gtk_bindings_activate_list (object, entries, is_release);
g_slist_free (entries);
return handled;
}
/**
* gtk_bindings_activate_event:
* @object: a #GObject (generally must be a widget)
* @event: a #GdkEventKey
*
* Looks up key bindings for @object to find one matching
* @event, and if one was found, activate it.
*
* Returns: %TRUE if a matching key binding was found
*
* Since: 2.4
*/
gboolean
gtk_bindings_activate_event (GObject *object,
GdkEventKey *event)
{
GSList *entries = NULL;
GdkDisplay *display;
GtkKeyHash *key_hash;
gboolean handled = FALSE;
guint16 keycode;
GdkModifierType state;
guint group;
if (!GTK_IS_WIDGET (object))
return FALSE;
display = gtk_widget_get_display (GTK_WIDGET (object));
key_hash = binding_key_hash_for_keymap (gdk_keymap_get_for_display (display));
gdk_event_get_keycode ((GdkEvent *)event, &keycode);
gdk_event_get_state ((GdkEvent *)event, &state);
gdk_event_get_key_group ((GdkEvent *)event, &group);
entries = _gtk_key_hash_lookup (key_hash,
keycode,
state,
BINDING_MOD_MASK () & ~GDK_RELEASE_MASK,
group);
handled = gtk_bindings_activate_list (object, entries,
gdk_event_get_event_type ((GdkEvent *) event) == GDK_KEY_RELEASE);
g_slist_free (entries);
return handled;
}
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