/*
 * Copyright (c) 2013 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "themes.h"

struct _ParasiteThemesPrivate
{
  int dummy;
};

G_DEFINE_TYPE_WITH_PRIVATE (ParasiteThemes, parasite_themes, GTK_TYPE_LIST_BOX)

static void
parasite_themes_init (ParasiteThemes *pt)
{
  pt->priv = parasite_themes_get_instance_private (pt);
}

static GtkWidget *
create_dark (ParasiteThemes *pt)
{
  GtkWidget *b, *l, *s;

  b = g_object_new (GTK_TYPE_BOX,
                    "orientation", GTK_ORIENTATION_HORIZONTAL,
                    "margin", 10,
                    NULL);

  l = g_object_new (GTK_TYPE_LABEL,
                    "label", "Use dark variant",
                    "hexpand", TRUE,
                    "xalign", 0.0,
                    NULL);
  gtk_container_add (GTK_CONTAINER (b), l);

  s = gtk_switch_new ();
  g_object_bind_property (s, "active",
                          gtk_settings_get_default (), "gtk-application-prefer-dark-theme",
                          G_BINDING_BIDIRECTIONAL);
  gtk_container_add (GTK_CONTAINER (b), s);

  return b;
}

static void
fill_gtk (const char *path, GHashTable *t)
{
  const gchar *dir_entry;
  GDir *dir = g_dir_open (path, 0, NULL);

  if (!dir)
    return;

  while ((dir_entry = g_dir_read_name (dir)))
    {
      char *filename = g_build_filename (path, dir_entry, "gtk-3.0", "gtk.css", NULL);

      if (g_file_test (filename, G_FILE_TEST_IS_REGULAR) &&
          !g_hash_table_contains (t, dir_entry))
        g_hash_table_add (t, g_strdup (dir_entry));

      g_free (filename);
    }
}

static void
gtk_changed (GtkComboBox *c, ParasiteThemes *pt)
{
  char *theme = gtk_combo_box_text_get_active_text (GTK_COMBO_BOX_TEXT (c));

  g_object_set (gtk_settings_get_default (),
                "gtk-theme-name", theme,
                NULL);
  g_free (theme);
}

static GtkWidget *
create_gtk (ParasiteThemes *pt)
{
  GtkWidget *b, *l, *c;
  GHashTable *t;
  char *theme, *default_theme, *path;
  GHashTableIter iter;
  int i, pos;
  GSettings *settings;

  b = g_object_new (GTK_TYPE_BOX,
                    "orientation", GTK_ORIENTATION_HORIZONTAL,
                    "margin", 10,
                    NULL);

  l = g_object_new (GTK_TYPE_LABEL,
                    "label", "GTK+ Theme",
                    "hexpand", TRUE,
                    "xalign", 0.0,
                    NULL);
  gtk_container_add (GTK_CONTAINER (b), l);

  t = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
  g_hash_table_add (t, g_strdup ("Raleigh"));

  fill_gtk (GTK_DATADIR "/themes", t);
  path = g_build_filename (g_get_user_data_dir (), "themes", NULL);
  fill_gtk (path, t);
  g_free (path);

  c = gtk_combo_box_text_new ();
  gtk_container_add (GTK_CONTAINER (b), c);

  settings = g_settings_new ("org.gnome.desktop.interface");
  default_theme = g_settings_get_string (settings, "gtk-theme");
  g_object_unref (settings);

  g_hash_table_iter_init (&iter, t);
  pos = i = 0;
  while (g_hash_table_iter_next (&iter, (gpointer *)&theme, NULL))
    {
      gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (c), theme);
      if (g_strcmp0 (theme, default_theme) == 0)
        pos = i;
      i++;
    }
  g_hash_table_destroy (t);

  gtk_combo_box_set_active (GTK_COMBO_BOX (c), pos);
  g_signal_connect (c, "changed", G_CALLBACK (gtk_changed), pt);

  return b;
}

static void
fill_icons (const char *path, GHashTable *t)
{
  const gchar *dir_entry;
  GDir *dir = g_dir_open (path, 0, NULL);

  if (!dir)
    return;

  while ((dir_entry = g_dir_read_name (dir)))
    {
      char *filename = g_build_filename (path, dir_entry, "index.theme", NULL);

      if (g_file_test (filename, G_FILE_TEST_IS_REGULAR) &&
          g_strcmp0 (dir_entry, "hicolor") != 0 &&
          !g_hash_table_contains (t, dir_entry))
        g_hash_table_add (t, g_strdup (dir_entry));

      g_free (filename);
    }
}

static void
icons_changed (GtkComboBox *c, ParasiteThemes *pt)
{
  char *theme = gtk_combo_box_text_get_active_text (GTK_COMBO_BOX_TEXT (c));

  g_object_set (gtk_settings_get_default (),
                "gtk-icon-theme-name", theme,
                NULL);
  g_free (theme);
}

static GtkWidget *
create_icons (ParasiteThemes *pt)
{
  GtkWidget *b, *l, *c;
  GHashTable *t;
  char *theme, *default_theme, *path;
  GHashTableIter iter;
  int i, pos;
  GSettings *settings;

  b = g_object_new (GTK_TYPE_BOX,
                    "orientation", GTK_ORIENTATION_HORIZONTAL,
                    "margin", 10,
                    NULL);

  l = g_object_new (GTK_TYPE_LABEL,
                    "label", "Icon Theme",
                    "hexpand", TRUE,
                    "xalign", 0.0,
                    NULL);
  gtk_container_add (GTK_CONTAINER (b), l);

  t = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);

  fill_icons (GTK_DATADIR "/icons", t);
  path = g_build_filename (g_get_user_data_dir (), "icons", NULL);
  fill_icons (path, t);
  g_free (path);

  c = gtk_combo_box_text_new ();
  gtk_container_add (GTK_CONTAINER (b), c);

  settings = g_settings_new ("org.gnome.desktop.interface");
  default_theme = g_settings_get_string (settings, "icon-theme");
  g_object_unref (settings);

  g_hash_table_iter_init (&iter, t);
  pos = i = 0;
  while (g_hash_table_iter_next (&iter, (gpointer *)&theme, NULL))
    {
      gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (c), theme);
      if (g_strcmp0 (theme, default_theme) == 0)
        pos = i;
      i++;
    }
  g_hash_table_destroy (t);

  gtk_combo_box_set_active (GTK_COMBO_BOX (c), pos);
  g_signal_connect (c, "changed", G_CALLBACK (icons_changed), pt);

  return b;
}

static void
constructed (GObject *object)
{
  ParasiteThemes *pt = PARASITE_THEMES (object);
  GtkContainer *box = GTK_CONTAINER (object);

  g_object_set (object,
                "selection-mode", GTK_SELECTION_NONE,
                NULL);

  gtk_container_add (box, create_dark (pt));
  gtk_container_add (box, create_gtk (pt));
  gtk_container_add (box, create_icons (pt));
}

static void
parasite_themes_class_init (ParasiteThemesClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);

  object_class->constructed  = constructed;
}

GtkWidget *
parasite_themes_new (void)
{
  return GTK_WIDGET (g_object_new (PARASITE_TYPE_THEMES, NULL));
}

// vim: set et sw=4 ts=4: