Plugin for Geany Refactoring C code

/*
 *      refactoring.c 2021
 *      https://www.geany.org/manual/reference/howto.html
 *
 *      RedHat: yum install intltool geany-devel
 *      Ubuntu: sudo apt-get install libgtk-3-dev
 *
 *      gcc -c savecopy.c -fPIC `pkg-config --cflags geany`
 *      gcc savecopy.o -o savecopy.so -shared `pkg-config --libs geany`
 *      sudo cp format_c.so /usr/lib/x86_64-linux-gnu/geany
 *
 *      Copyright 2021 Nikolay <xeritt(at)gmail.com>
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 *
 *      This program 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 General Public License for more details.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *      MA 02110-1301, USA.
 */
#include <stdio.h>
#include <geanyplugin.h>
static void write_data(const gchar *filename, const gchar *data){
    gint error_nr = utils_write_file(filename, data);
    gchar *utf8_filename = utils_get_utf8_from_locale(filename);

    if (error_nr == 0)
        ui_set_statusbar(TRUE, _("Document successfully exported as '%s'."), utf8_filename);
    else
        ui_set_statusbar(TRUE, _("File '%s' could not be written (%s)."),
            utf8_filename, g_strerror(error_nr));

    g_free(utf8_filename);
}

static void extractConst(GtkMenuItem *menuitem, gpointer user_data){
    GeanyDocument *doc;
    doc = document_get_current();

    //dialogs_show_msgbox(GTK_MESSAGE_INFO, sci_get_selection_contents(doc->editor->sci));

    gint doc_len, i;
    doc_len = sci_get_length(doc->editor->sci);

    gchar c, c_next;
    int fCom = 0;
    for (i = 0; i < doc_len; ++i){
        c = sci_get_char_at(doc->editor->sci, i);
        if (c == '*') {
            fCom++;
        }
        if (fCom>0){
            if (c == '/'){
                ++i;
                gchar* seltext = sci_get_selection_contents(doc->editor->sci);
                int offset = 13;
                sci_insert_text(doc->editor->sci, i, "\n");
                sci_insert_text(doc->editor->sci, i + 1, ";");
                sci_insert_text(doc->editor->sci, i + 1, "const <type>");
                sci_insert_text(doc->editor->sci, i + offset, seltext);
                sci_set_current_position(doc->editor->sci, i + offset, TRUE);
                ui_set_statusbar(TRUE, _("Extract const at position '%i'."), i);
                break;
            }
        }
    }
}


static void extractDefine(GtkMenuItem *menuitem, gpointer user_data){
    GeanyDocument *doc;
    doc = document_get_current();

    //dialogs_show_msgbox(GTK_MESSAGE_INFO, sci_get_selection_contents(doc->editor->sci));

    gint doc_len, i;
    doc_len = sci_get_length(doc->editor->sci);

    gchar c, c_next;
    int fCom = 0;
    for (i = 0; i < doc_len; ++i){
        c = sci_get_char_at(doc->editor->sci, i);
        if (c == '*') {
            fCom++;
        }
        if (fCom>0){
            if (c == '/'){
                ++i;
                gchar* seltext = sci_get_selection_contents(doc->editor->sci);
                int offset = 9;
                sci_insert_text(doc->editor->sci, i, "\n");
                sci_insert_text(doc->editor->sci, i + 1, "#define  ");
                sci_insert_text(doc->editor->sci, i + offset, seltext);
                sci_set_current_position(doc->editor->sci, i + offset, TRUE);
                ui_set_statusbar(TRUE, _("Extract define at position '%i'."), i);
                break;
            }
        }
    }
}

static gboolean save_init(GeanyPlugin *plugin, gpointer pdata){

  GtkWidget* refactMenu;
  GtkWidget* refactSubItem;
  GtkWidget* menuItem;
  GtkWidget* extractConstItem;
  refactMenu = gtk_menu_new();

  refactSubItem = gtk_menu_item_new_with_label("Refactoring");
  menuItem = gtk_menu_item_new_with_label("Extract #define ...");
  extractConstItem = gtk_menu_item_new_with_label("Extract const ...");

  gtk_menu_item_set_submenu(GTK_MENU_ITEM(refactSubItem), refactMenu);
  gtk_menu_shell_append(GTK_MENU_SHELL(refactMenu), menuItem);
  gtk_menu_shell_append(GTK_MENU_SHELL(refactMenu), extractConstItem);

  gtk_widget_show(menuItem);
  gtk_widget_show(extractConstItem);
  gtk_widget_show(refactSubItem);

  gtk_container_add(GTK_CONTAINER(plugin->geany_data->main_widgets->editor_menu), refactSubItem);
  g_signal_connect(menuItem, "activate", G_CALLBACK(extractDefine), NULL);
  g_signal_connect(extractConstItem, "activate", G_CALLBACK(extractConst), NULL);
  geany_plugin_set_data(plugin, refactMenu, NULL);

  return TRUE;
}
static void save_cleanup(GeanyPlugin *plugin, gpointer pdata)
{
    GtkWidget *main_menu_item = (GtkWidget *) pdata;
    gtk_widget_destroy(main_menu_item);
}
G_MODULE_EXPORT
void geany_load_module(GeanyPlugin *plugin)
{
    /* Step 1: Set metadata */
    plugin->info->name = "Refactoring";
    plugin->info->description = "Simple action code refactoring";
    plugin->info->version = "1.0";
    plugin->info->author = "Nikolay <[email protected]>";
    /* Step 2: Set functions */
    plugin->funcs->init = save_init;
    plugin->funcs->cleanup = save_cleanup;
    /* Step 3: Register! */
    GEANY_PLUGIN_REGISTER(plugin, 225);
    /* alternatively:
    GEANY_PLUGIN_REGISTER_FULL(plugin, 225, data, free_func); */
}