gtk2/gtk/gtkwidgetpath.c
2011-03-27 15:43:31 +02:00

1135 lines
28 KiB
C

/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include "gtkwidget.h"
#include "gtkwidgetpath.h"
#include "gtkstylecontextprivate.h"
/**
* SECTION:gtkwidgetpath
* @Short_description: Widget path abstraction
* @Title: GtkWidgetPath
* @See_also: #GtkStyleContext
*
* GtkWidgetPath is a boxed type that represents a widget hierarchy from
* the topmost widget, typically a toplevel, to any child. This widget
* path abstraction is used in #GtkStyleContext on behalf of the real
* widget in order to query style information.
*
* If you are using GTK+ widgets, you probably will not need to use
* this API directly, as there is gtk_widget_get_path(), and the style
* context returned by gtk_widget_get_style_context() will be automatically
* updated on widget hierarchy changes.
*
* The widget path generation is generally simple:
* <example>
* <title>Defining a button within a window</title>
* <programlisting>
* {
* GtkWidgetPath *path;
*
* path = gtk_widget_path_new ();
* gtk_widget_path_append_type (path, GTK_TYPE_WINDOW);
* gtk_widget_path_append_type (path, GTK_TYPE_BUTTON);
* }
* </programlisting>
* </example>
*
* Although more complex information, such as widget names, or
* different classes (property that may be used by other widget
* types) and intermediate regions may be included:
*
* <example>
* <title>Defining the first tab widget in a notebook</title>
* <programlisting>
* {
* GtkWidgetPath *path;
* guint pos;
*
* path = gtk_widget_path_new ();
*
* pos = gtk_widget_path_append_type (path, GTK_TYPE_NOTEBOOK);
* gtk_widget_path_iter_add_region (path, pos, "tab", GTK_REGION_EVEN | GTK_REGION_FIRST);
*
* pos = gtk_widget_path_append_type (path, GTK_TYPE_LABEL);
* gtk_widget_path_iter_set_name (path, pos, "first tab label");
* }
* </programlisting>
* </example>
*
* All this information will be used to match the style information
* that applies to the described widget.
**/
G_DEFINE_BOXED_TYPE (GtkWidgetPath, gtk_widget_path,
gtk_widget_path_copy, gtk_widget_path_free)
typedef struct GtkPathElement GtkPathElement;
struct GtkPathElement
{
GType type;
GQuark name;
GHashTable *regions;
GArray *classes;
};
struct _GtkWidgetPath
{
GArray *elems; /* First element contains the described widget */
};
/**
* gtk_widget_path_new:
*
* Returns an empty widget path.
*
* Returns: (transfer full): A newly created, empty, #GtkWidgetPath
*
* Since: 3.0
**/
GtkWidgetPath *
gtk_widget_path_new (void)
{
GtkWidgetPath *path;
path = g_slice_new0 (GtkWidgetPath);
path->elems = g_array_new (FALSE, TRUE, sizeof (GtkPathElement));
return path;
}
/**
* gtk_widget_path_copy:
* @path: a #GtkWidgetPath
*
* Returns a copy of @path
*
* Returns: (transfer full): a copy of @path
*
* Since: 3.0
**/
GtkWidgetPath *
gtk_widget_path_copy (const GtkWidgetPath *path)
{
GtkWidgetPath *new_path;
guint i;
g_return_val_if_fail (path != NULL, NULL);
new_path = gtk_widget_path_new ();
for (i = 0; i < path->elems->len; i++)
{
GtkPathElement *elem, new = { 0 };
elem = &g_array_index (path->elems, GtkPathElement, i);
new.type = elem->type;
new.name = elem->name;
if (elem->regions)
{
GHashTableIter iter;
gpointer key, value;
g_hash_table_iter_init (&iter, elem->regions);
new.regions = g_hash_table_new (NULL, NULL);
while (g_hash_table_iter_next (&iter, &key, &value))
g_hash_table_insert (new.regions, key, value);
}
if (elem->classes)
{
new.classes = g_array_new (FALSE, FALSE, sizeof (GQuark));
g_array_append_vals (new.classes, elem->classes->data, elem->classes->len);
}
g_array_append_val (new_path->elems, new);
}
return new_path;
}
/**
* gtk_widget_path_free:
* @path: a #GtkWidgetPath
*
* Frees a #GtkWidgetPath.
*
* Since: 3.0
**/
void
gtk_widget_path_free (GtkWidgetPath *path)
{
guint i;
g_return_if_fail (path != NULL);
for (i = 0; i < path->elems->len; i++)
{
GtkPathElement *elem;
elem = &g_array_index (path->elems, GtkPathElement, i);
if (elem->regions)
g_hash_table_destroy (elem->regions);
if (elem->classes)
g_array_free (elem->classes, TRUE);
}
g_array_free (path->elems, TRUE);
g_slice_free (GtkWidgetPath, path);
}
/**
* gtk_widget_path_length:
* @path: a #GtkWidgetPath
*
* Returns the number of #GtkWidget #GTypes between the represented
* widget and its topmost container.
*
* Returns: the number of elements in the path
*
* Since: 3.0
**/
gint
gtk_widget_path_length (const GtkWidgetPath *path)
{
g_return_val_if_fail (path != NULL, 0);
return path->elems->len;
}
/**
* gtk_widget_path_to_string:
* @path: the path
*
* Dumps the widget path into a string representation. It tries to match
* the CSS style as closely as possible (Note that there might be paths
* that cannot be represented in CSS).
*
* The main use of this code is for debugging purposes, so that you can
* g_print() the path or dump it in a gdb session.
*
* Returns: A new string describing @path.
*
* Since: 3.2
**/
char *
gtk_widget_path_to_string (const GtkWidgetPath *path)
{
GString *string;
guint i, j;
g_return_val_if_fail (path != NULL, NULL);
string = g_string_new ("");
for (i = 0; i < path->elems->len; i++)
{
GtkPathElement *elem;
elem = &g_array_index (path->elems, GtkPathElement, i);
if (i > 0)
g_string_append_c (string, ' ');
g_string_append (string, g_type_name (elem->type));
if (elem->name)
{
g_string_append_c (string, '(');
g_string_append (string, g_quark_to_string (elem->name));
g_string_append_c (string, ')');
}
if (elem->classes)
{
for (j = 0; j < elem->classes->len; j++)
{
g_string_append_c (string, '.');
g_string_append (string, g_quark_to_string (g_array_index (elem->classes, GQuark, j)));
}
}
if (elem->regions)
{
GHashTableIter iter;
gpointer key, value;
g_hash_table_iter_init (&iter, elem->regions);
while (g_hash_table_iter_next (&iter, &key, &value))
{
GtkRegionFlags flags = GPOINTER_TO_UINT (value);
static const char *flag_names[] = {
"even",
"odd",
"first",
"last",
"sorted"
};
g_string_append_c (string, ' ');
g_string_append (string, g_quark_to_string (GPOINTER_TO_UINT (key)));
for (j = 0; j < G_N_ELEMENTS(flag_names); j++)
{
if (flags & (1 << j))
{
g_string_append_c (string, ':');
g_string_append (string, flag_names[j]);
}
}
}
}
}
return g_string_free (string, FALSE);
}
/**
* gtk_widget_path_prepend_type:
* @path: a #GtkWidgetPath
* @type: widget type to prepend
*
* Prepends a widget type to the widget hierachy represented by @path.
*
* Since: 3.0
**/
void
gtk_widget_path_prepend_type (GtkWidgetPath *path,
GType type)
{
GtkPathElement new = { 0 };
g_return_if_fail (path != NULL);
new.type = type;
g_array_prepend_val (path->elems, new);
}
/**
* gtk_widget_path_append_type:
* @path: a #GtkWidgetPath
* @type: widget type to append
*
* Appends a widget type to the widget hierachy represented by @path.
*
* Returns: the position where the element was inserted
*
* Since: 3.0
**/
gint
gtk_widget_path_append_type (GtkWidgetPath *path,
GType type)
{
GtkPathElement new = { 0 };
g_return_val_if_fail (path != NULL, 0);
new.type = type;
g_array_append_val (path->elems, new);
return path->elems->len - 1;
}
/**
* gtk_widget_path_iter_get_object_type:
* @path: a #GtkWidgetPath
* @pos: position to get the object type for, -1 for the path head
*
* Returns the object #GType that is at position @pos in the widget
* hierarchy defined in @path.
*
* Returns: a widget type
*
* Since: 3.0
**/
GType
gtk_widget_path_iter_get_object_type (const GtkWidgetPath *path,
gint pos)
{
GtkPathElement *elem;
g_return_val_if_fail (path != NULL, G_TYPE_INVALID);
g_return_val_if_fail (path->elems->len != 0, G_TYPE_INVALID);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
return elem->type;
}
/**
* gtk_widget_path_iter_set_object_type:
* @path: a #GtkWidgetPath
* @pos: position to modify, -1 for the path head
* @type: object type to set
*
* Sets the object type for a given position in the widget hierarchy
* defined by @path.
*
* Since: 3.0
**/
void
gtk_widget_path_iter_set_object_type (GtkWidgetPath *path,
gint pos,
GType type)
{
GtkPathElement *elem;
g_return_if_fail (path != NULL);
g_return_if_fail (path->elems->len != 0);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
elem->type = type;
}
/**
* gtk_widget_path_iter_get_name:
* @path: a #GtkWidgetPath
* @pos: position to get the widget name for, -1 for the path head
*
* Returns the name corresponding to the widget found at
* the position @pos in the widget hierarchy defined by
* @path
*
* Returns: The widget name, or %NULL if none was set.
**/
G_CONST_RETURN gchar *
gtk_widget_path_iter_get_name (const GtkWidgetPath *path,
gint pos)
{
GtkPathElement *elem;
g_return_val_if_fail (path != NULL, NULL);
g_return_val_if_fail (path->elems->len != 0, NULL);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
return g_quark_to_string (elem->name);
}
/**
* gtk_widget_path_iter_set_name:
* @path: a #GtkWidgetPath
* @pos: position to modify, -1 for the path head
* @name: widget name
*
* Sets the widget name for the widget found at position @pos
* in the widget hierarchy defined by @path.
*
* Since: 3.0
**/
void
gtk_widget_path_iter_set_name (GtkWidgetPath *path,
gint pos,
const gchar *name)
{
GtkPathElement *elem;
g_return_if_fail (path != NULL);
g_return_if_fail (path->elems->len != 0);
g_return_if_fail (name != NULL);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
elem->name = g_quark_from_string (name);
}
/**
* gtk_widget_path_iter_has_qname:
* @path: a #GtkWidgetPath
* @pos: position to query, -1 for the path head
* @qname: widget name as a #GQuark
*
* See gtk_widget_path_iter_has_name(). This is a version
* that operates on #GQuark<!-- -->s.
*
* Returns: %TRUE if the widget at @pos has this name
*
* Since: 3.0
**/
gboolean
gtk_widget_path_iter_has_qname (const GtkWidgetPath *path,
gint pos,
GQuark qname)
{
GtkPathElement *elem;
g_return_val_if_fail (path != NULL, FALSE);
g_return_val_if_fail (path->elems->len != 0, FALSE);
g_return_val_if_fail (qname != 0, FALSE);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
return (elem->name == qname);
}
/**
* gtk_widget_path_iter_has_name:
* @path: a #GtkWidgetPath
* @pos: position to query, -1 for the path head
* @name: a widget name
*
* Returns %TRUE if the widget at position @pos has the name @name,
* %FALSE otherwise.
*
* Returns: %TRUE if the widget at @pos has this name
*
* Since: 3.0
**/
gboolean
gtk_widget_path_iter_has_name (const GtkWidgetPath *path,
gint pos,
const gchar *name)
{
GQuark qname;
g_return_val_if_fail (path != NULL, FALSE);
g_return_val_if_fail (path->elems->len != 0, FALSE);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
qname = g_quark_try_string (name);
if (qname == 0)
return FALSE;
return gtk_widget_path_iter_has_qname (path, pos, qname);
}
/**
* gtk_widget_path_iter_add_class:
* @path: a #GtkWidget
* @pos: position to modify, -1 for the path head
* @name: a class name
*
* Adds the class @name to the widget at position @pos in
* the hierarchy defined in @path. See
* gtk_style_context_add_class().
*
* Since: 3.0
**/
void
gtk_widget_path_iter_add_class (GtkWidgetPath *path,
gint pos,
const gchar *name)
{
GtkPathElement *elem;
gboolean added = FALSE;
GQuark qname;
guint i;
g_return_if_fail (path != NULL);
g_return_if_fail (path->elems->len != 0);
g_return_if_fail (name != NULL);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
qname = g_quark_from_string (name);
if (!elem->classes)
elem->classes = g_array_new (FALSE, FALSE, sizeof (GQuark));
for (i = 0; i < elem->classes->len; i++)
{
GQuark quark;
quark = g_array_index (elem->classes, GQuark, i);
if (qname == quark)
{
/* Already there */
added = TRUE;
break;
}
if (qname < quark)
{
g_array_insert_val (elem->classes, i, qname);
added = TRUE;
break;
}
}
if (!added)
g_array_append_val (elem->classes, qname);
}
/**
* gtk_widget_path_iter_remove_class:
* @path: a #GtkWidgetPath
* @pos: position to modify, -1 for the path head
* @name: class name
*
* Removes the class @name from the widget at position @pos in
* the hierarchy defined in @path.
*
* Since: 3.0
**/
void
gtk_widget_path_iter_remove_class (GtkWidgetPath *path,
gint pos,
const gchar *name)
{
GtkPathElement *elem;
GQuark qname;
guint i;
g_return_if_fail (path != NULL);
g_return_if_fail (path->elems->len != 0);
g_return_if_fail (name != NULL);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
qname = g_quark_try_string (name);
if (qname == 0)
return;
elem = &g_array_index (path->elems, GtkPathElement, pos);
if (!elem->classes)
return;
for (i = 0; i < elem->classes->len; i++)
{
GQuark quark;
quark = g_array_index (elem->classes, GQuark, i);
if (quark > qname)
break;
else if (quark == qname)
{
g_array_remove_index (elem->classes, i);
break;
}
}
}
/**
* gtk_widget_path_iter_clear_classes:
* @path: a #GtkWidget
* @pos: position to modify, -1 for the path head
*
* Removes all classes from the widget at position @pos in the
* hierarchy defined in @path.
*
* Since: 3.0
**/
void
gtk_widget_path_iter_clear_classes (GtkWidgetPath *path,
gint pos)
{
GtkPathElement *elem;
g_return_if_fail (path != NULL);
g_return_if_fail (path->elems->len != 0);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
if (!elem->classes)
return;
if (elem->classes->len > 0)
g_array_remove_range (elem->classes, 0, elem->classes->len);
}
/**
* gtk_widget_path_iter_list_classes:
* @path: a #GtkWidgetPath
* @pos: position to query, -1 for the path head
*
* Returns a list with all the class names defined for the widget
* at position @pos in the hierarchy defined in @path.
*
* Returns: (transfer container) (element-type utf8): The list of
* classes, This is a list of strings, the #GSList contents
* are owned by GTK+, but you should use g_slist_free() to
* free the list itself.
*
* Since: 3.0
**/
GSList *
gtk_widget_path_iter_list_classes (const GtkWidgetPath *path,
gint pos)
{
GtkPathElement *elem;
GSList *list = NULL;
guint i;
g_return_val_if_fail (path != NULL, NULL);
g_return_val_if_fail (path->elems->len != 0, NULL);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
if (!elem->classes)
return NULL;
for (i = 0; i < elem->classes->len; i++)
{
GQuark quark;
quark = g_array_index (elem->classes, GQuark, i);
list = g_slist_prepend (list, (gchar *) g_quark_to_string (quark));
}
return g_slist_reverse (list);
}
/**
* gtk_widget_path_iter_has_qclass:
* @path: a #GtkWidgetPath
* @pos: position to query, -1 for the path head
* @qname: class name as a #GQuark
*
* See gtk_widget_path_iter_has_class(). This is a version that operates
* with GQuark<!-- -->s.
*
* Returns: %TRUE if the widget at @pos has the class defined.
*
* Since: 3.0
**/
gboolean
gtk_widget_path_iter_has_qclass (const GtkWidgetPath *path,
gint pos,
GQuark qname)
{
GtkPathElement *elem;
guint i;
g_return_val_if_fail (path != NULL, FALSE);
g_return_val_if_fail (path->elems->len != 0, FALSE);
g_return_val_if_fail (qname != 0, FALSE);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
if (!elem->classes)
return FALSE;
for (i = 0; i < elem->classes->len; i++)
{
GQuark quark;
quark = g_array_index (elem->classes, GQuark, i);
if (quark == qname)
return TRUE;
else if (quark > qname)
break;
}
return FALSE;
}
/**
* gtk_widget_path_iter_has_class:
* @path: a #GtkWidgetPath
* @pos: position to query, -1 for the path head
* @name: class name
*
* Returns %TRUE if the widget at position @pos has the class @name
* defined, %FALSE otherwise.
*
* Returns: %TRUE if the class @name is defined for the widget at @pos
*
* Since: 3.0
**/
gboolean
gtk_widget_path_iter_has_class (const GtkWidgetPath *path,
gint pos,
const gchar *name)
{
GQuark qname;
g_return_val_if_fail (path != NULL, FALSE);
g_return_val_if_fail (path->elems->len != 0, FALSE);
g_return_val_if_fail (name != NULL, FALSE);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
qname = g_quark_try_string (name);
if (qname == 0)
return FALSE;
return gtk_widget_path_iter_has_qclass (path, pos, qname);
}
/**
* gtk_widget_path_iter_add_region:
* @path: a #GtkWidgetPath
* @pos: position to modify, -1 for the path head
* @name: region name
* @flags: flags affecting the region
*
* Adds the region @name to the widget at position @pos in
* the hierarchy defined in @path. See
* gtk_style_context_add_region().
*
* <note><para>Region names must only contain lowercase letters
* and '-', starting always with a lowercase letter.</para></note>
*
* Since: 3.0
**/
void
gtk_widget_path_iter_add_region (GtkWidgetPath *path,
gint pos,
const gchar *name,
GtkRegionFlags flags)
{
GtkPathElement *elem;
GQuark qname;
g_return_if_fail (path != NULL);
g_return_if_fail (path->elems->len != 0);
g_return_if_fail (name != NULL);
g_return_if_fail (_gtk_style_context_check_region_name (name));
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
qname = g_quark_from_string (name);
if (!elem->regions)
elem->regions = g_hash_table_new (NULL, NULL);
g_hash_table_insert (elem->regions,
GUINT_TO_POINTER (qname),
GUINT_TO_POINTER (flags));
}
/**
* gtk_widget_path_iter_remove_region:
* @path: a #GtkWidgetPath
* @pos: position to modify, -1 for the path head
* @name: region name
*
* Removes the region @name from the widget at position @pos in
* the hierarchy defined in @path.
*
* Since: 3.0
**/
void
gtk_widget_path_iter_remove_region (GtkWidgetPath *path,
gint pos,
const gchar *name)
{
GtkPathElement *elem;
GQuark qname;
g_return_if_fail (path != NULL);
g_return_if_fail (path->elems->len != 0);
g_return_if_fail (name != NULL);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
qname = g_quark_try_string (name);
if (qname == 0)
return;
elem = &g_array_index (path->elems, GtkPathElement, pos);
if (elem->regions)
g_hash_table_remove (elem->regions, GUINT_TO_POINTER (qname));
}
/**
* gtk_widget_path_iter_clear_regions:
* @path: a #GtkWidgetPath
* @pos: position to modify, -1 for the path head
*
* Removes all regions from the widget at position @pos in the
* hierarchy defined in @path.
*
* Since: 3.0
**/
void
gtk_widget_path_iter_clear_regions (GtkWidgetPath *path,
gint pos)
{
GtkPathElement *elem;
g_return_if_fail (path != NULL);
g_return_if_fail (path->elems->len != 0);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
if (elem->regions)
g_hash_table_remove_all (elem->regions);
}
/**
* gtk_widget_path_iter_list_regions:
* @path: a #GtkWidgetPath
* @pos: position to query, -1 for the path head
*
* Returns a list with all the region names defined for the widget
* at position @pos in the hierarchy defined in @path.
*
* Returns: (transfer container) (element-type utf8): The list of
* regions, This is a list of strings, the #GSList contents
* are owned by GTK+, but you should use g_slist_free() to
* free the list itself.
*
* Since: 3.0
**/
GSList *
gtk_widget_path_iter_list_regions (const GtkWidgetPath *path,
gint pos)
{
GtkPathElement *elem;
GHashTableIter iter;
GSList *list = NULL;
gpointer key;
g_return_val_if_fail (path != NULL, NULL);
g_return_val_if_fail (path->elems->len != 0, NULL);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
if (!elem->regions)
return NULL;
g_hash_table_iter_init (&iter, elem->regions);
while (g_hash_table_iter_next (&iter, &key, NULL))
{
GQuark qname;
qname = GPOINTER_TO_UINT (key);
list = g_slist_prepend (list, (gchar *) g_quark_to_string (qname));
}
return list;
}
/**
* gtk_widget_path_iter_has_qregion:
* @path: a #GtkWidgetPath
* @pos: position to query, -1 for the path head
* @qname: region name as a #GQuark
* @flags: (out): return location for the region flags
*
* See gtk_widget_path_iter_has_region(). This is a version that operates
* with GQuark<!-- -->s.
*
* Returns: %TRUE if the widget at @pos has the region defined.
*
* Since: 3.0
**/
gboolean
gtk_widget_path_iter_has_qregion (const GtkWidgetPath *path,
gint pos,
GQuark qname,
GtkRegionFlags *flags)
{
GtkPathElement *elem;
gpointer value;
g_return_val_if_fail (path != NULL, FALSE);
g_return_val_if_fail (path->elems->len != 0, FALSE);
g_return_val_if_fail (qname != 0, FALSE);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
if (!elem->regions)
return FALSE;
if (!g_hash_table_lookup_extended (elem->regions,
GUINT_TO_POINTER (qname),
NULL, &value))
return FALSE;
if (flags)
*flags = GPOINTER_TO_UINT (value);
return TRUE;
}
/**
* gtk_widget_path_iter_has_region:
* @path: a #GtkWidgetPath
* @pos: position to query, -1 for the path head
* @name: region name
* @flags: (out): return location for the region flags
*
* Returns %TRUE if the widget at position @pos has the class @name
* defined, %FALSE otherwise.
*
* Returns: %TRUE if the class @name is defined for the widget at @pos
*
* Since: 3.0
**/
gboolean
gtk_widget_path_iter_has_region (const GtkWidgetPath *path,
gint pos,
const gchar *name,
GtkRegionFlags *flags)
{
GQuark qname;
g_return_val_if_fail (path != NULL, FALSE);
g_return_val_if_fail (path->elems->len != 0, FALSE);
g_return_val_if_fail (name != NULL, FALSE);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
qname = g_quark_try_string (name);
if (qname == 0)
return FALSE;
return gtk_widget_path_iter_has_qregion (path, pos, qname, flags);
}
/**
* gtk_widget_path_get_object_type:
* @path: a #GtkWidget
*
* Returns the topmost object type, that is, the object type this path
* is representing.
*
* Returns: The object type
*
* Since: 3.0
**/
GType
gtk_widget_path_get_object_type (const GtkWidgetPath *path)
{
GtkPathElement *elem;
g_return_val_if_fail (path != NULL, G_TYPE_INVALID);
elem = &g_array_index (path->elems, GtkPathElement,
path->elems->len - 1);
return elem->type;
}
/**
* gtk_widget_path_is_type:
* @path: a #GtkWidgetPath
* @type: widget type to match
*
* Returns %TRUE if the widget type represented by this path
* is @type, or a subtype of it.
*
* Returns: %TRUE if the widget represented by @path is of type @type
*
* Since: 3.0
**/
gboolean
gtk_widget_path_is_type (const GtkWidgetPath *path,
GType type)
{
GtkPathElement *elem;
g_return_val_if_fail (path != NULL, FALSE);
elem = &g_array_index (path->elems, GtkPathElement,
path->elems->len - 1);
if (elem->type == type ||
g_type_is_a (elem->type, type))
return TRUE;
return FALSE;
}
/**
* gtk_widget_path_has_parent:
* @path: a #GtkWidgetPath
* @type: widget type to check in parents
*
* Returns %TRUE if any of the parents of the widget represented
* in @path is of type @type, or any subtype of it.
*
* Returns: %TRUE if any parent is of type @type
*
* Since: 3.0
**/
gboolean
gtk_widget_path_has_parent (const GtkWidgetPath *path,
GType type)
{
guint i;
g_return_val_if_fail (path != NULL, FALSE);
for (i = 0; i < path->elems->len - 1; i++)
{
GtkPathElement *elem;
elem = &g_array_index (path->elems, GtkPathElement, i);
if (elem->type == type ||
g_type_is_a (elem->type, type))
return TRUE;
}
return FALSE;
}