Automatically Sort Geany's Document Tabs

tabsort.c

#include <geanyplugin.h>

GeanyData *geany_data;
GeanyPlugin *geany_plugin;
GeanyFunctions *geany_functions;

PLUGIN_VERSION_CHECK(211);

PLUGIN_SET_INFO("Tab Sort",
                "Automatically keeps document tabs sorted",
                "v0.01",
                "Matthew Brush <matt@geany.org>");

struct tab_info
{
  gchar *label;
  GtkWidget *page;
};

static gint compare_tab_info(const struct tab_info *t1, const struct tab_info *t2)
{
  return g_utf8_collate(t2->label, t1->label);
}

static void sort_tabs_callback(GObject *geany_object, GeanyDocument *doc, gpointer user_data)
{
  GtkNotebook *nb = GTK_NOTEBOOK(geany_data->main_widgets->notebook);
  gint index, n_pages = gtk_notebook_get_n_pages(nb);
  GSList *tab, *tabs = NULL;

  gtk_notebook_set_tab_reorderable(nb, GTK_WIDGET(doc->editor->sci), FALSE);

  for (index = 0; index < n_pages; index++)
  {
    struct tab_info *inf = g_slice_alloc(sizeof(struct tab_info));
    inf->page = gtk_notebook_get_nth_page(nb, index);
    inf->label = document_get_basename_for_display(document_get_from_page(index), index);
    tabs = g_slist_prepend(tabs, inf);
  }

  tabs = g_slist_sort(tabs, (GCompareFunc) compare_tab_info);
  for (tab = tabs, index = 0; tab != NULL && index < n_pages; tab = tab->next, n_pages++)
    gtk_notebook_reorder_child(nb, ((struct tab_info *)tab->data)->page, index);

  for (tab = tabs; tab != NULL; tab = tab->next)
  {
    struct tab_info *inf = tab->data;
    g_free(inf->label);
    g_slice_free1(sizeof(struct tab_info), inf);
  }
  g_slist_free(tabs);
}

static void document_notebook_set_tabs_reorderable(GtkNotebook *nb, gboolean reorderable)
{
  gint index, n_pages = gtk_notebook_get_n_pages(nb);
  for (index = 0; index < n_pages; index++)
    gtk_notebook_set_tab_reorderable(nb, gtk_notebook_get_nth_page(nb, index), reorderable);
}

void plugin_init(GeanyData *data)
{
  document_notebook_set_tabs_reorderable(GTK_NOTEBOOK(data->main_widgets->notebook), FALSE);
  plugin_signal_connect(geany_plugin, NULL, "document-open", TRUE, G_CALLBACK(sort_tabs_callback), NULL);
}

void plugin_cleanup(void)
{
  document_notebook_set_tabs_reorderable(GTK_NOTEBOOK(geany_data->main_widgets->notebook), TRUE);
}