gtk3/gtk/gtkwidgetpath.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"

typedef struct GtkPathElement GtkPathElement;

struct GtkPathElement
{
  GType type;
  gchar *name;
};

struct GtkWidgetPath
{
  GArray *elems; /* First element contains the described widget */
};

GtkWidgetPath *
gtk_widget_path_new (void)
{
  GtkWidgetPath *path;

  path = g_slice_new0 (GtkWidgetPath);
  path->elems = g_array_new (FALSE, TRUE, sizeof (GtkPathElement));

  return path;
}

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 = g_strdup (elem->name);

      g_array_append_val (new_path->elems, new);
    }

  return new_path;
}

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);
      g_free (elem->name);
    }

  g_array_free (path->elems, TRUE);
  g_slice_free (GtkWidgetPath, path);
}

guint
gtk_widget_path_length (GtkWidgetPath *path)
{
  g_return_val_if_fail (path != NULL, 0);

  return path->elems->len;
}

guint
gtk_widget_path_prepend_type (GtkWidgetPath *path,
                              GType          type)
{
  GtkPathElement new = { 0 };

  g_return_val_if_fail (path != NULL, 0);
  g_return_val_if_fail (g_type_is_a (type, GTK_TYPE_WIDGET), 0);

  new.type = type;
  g_array_append_val (path->elems, new);

  return path->elems->len - 1;
}

GType
gtk_widget_path_get_element_type (GtkWidgetPath *path,
                                  guint          pos)
{
  GtkPathElement *elem;

  g_return_val_if_fail (path != NULL, G_TYPE_INVALID);
  g_return_val_if_fail (pos < path->elems->len, G_TYPE_INVALID);

  elem = &g_array_index (path->elems, GtkPathElement, pos);
  return elem->type;
}

void
gtk_widget_path_set_element_type (GtkWidgetPath *path,
                                  guint          pos,
                                  GType          type)
{
  GtkPathElement *elem;

  g_return_if_fail (path != NULL);
  g_return_if_fail (pos < path->elems->len);
  g_return_if_fail (g_type_is_a (type, GTK_TYPE_WIDGET));

  elem = &g_array_index (path->elems, GtkPathElement, pos);
  elem->type = type;
}

G_CONST_RETURN gchar *
gtk_widget_path_get_element_name (GtkWidgetPath *path,
                                  guint          pos)
{
  GtkPathElement *elem;

  g_return_val_if_fail (path != NULL, NULL);
  g_return_val_if_fail (pos < path->elems->len, NULL);

  elem = &g_array_index (path->elems, GtkPathElement, pos);
  return elem->name;
}

void
gtk_widget_path_set_element_name (GtkWidgetPath *path,
                                  guint          pos,
                                  const gchar   *name)
{
  GtkPathElement *elem;

  g_return_if_fail (path != NULL);
  g_return_if_fail (pos < path->elems->len);
  g_return_if_fail (name != NULL);

  elem = &g_array_index (path->elems, GtkPathElement, pos);

  if (elem->name)
    g_free (elem->name);

  elem->name = g_strdup (name);
}

gboolean
gtk_widget_path_has_parent (const GtkWidgetPath *path,
                            GType                type)
{
  guint i;

  g_return_val_if_fail (path != NULL, FALSE);
  g_return_val_if_fail (g_type_is_a (type, GTK_TYPE_WIDGET), FALSE);

  for (i = 1; i < path->elems->len; 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;
}