Someone

#include <gtk/gtk.h>
#include <libglade-2.0/glade/glade.h>

void create_tags (GtkTextBuffer * buffer);
void on_button_clear_clicked (GtkButton * button, gpointer user_data);
void on_button_cut_clicked (GtkButton * button, gpointer user_data);
void on_button_copy_clicked (GtkButton * button, gpointer user_data);
void on_button_paste_clicked (GtkButton * button, gpointer user_data);
void on_button_bold_clicked (GtkButton * button, gpointer user_data);
void on_button_underline_clicked (GtkButton * button, gpointer user_data);
void on_button_strikethrough_clicked (GtkButton * button, gpointer user_data);
void on_button_color_clicked (GtkButton * button, gpointer user_data);

void
on_button_clear_clicked (GtkButton * button, gpointer user_data)
{
    GtkTextBuffer *textbuffer = NULL;

    g_assert (GTK_IS_TEXT_VIEW (user_data));

    textbuffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (user_data));

    gtk_text_buffer_delete_selection (textbuffer, TRUE, TRUE);
}

void
on_button_cut_clicked (GtkButton * button, gpointer user_data)
{
    GtkTextBuffer *textbuffer = NULL;

    g_assert (GTK_IS_TEXT_VIEW (user_data));

    textbuffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (user_data));

    gtk_text_buffer_cut_clipboard (textbuffer,
                       gtk_clipboard_get (GDK_NONE), TRUE);
}

void
on_button_copy_clicked (GtkButton * button, gpointer user_data)
{
    GtkTextBuffer *textbuffer = NULL;

    g_assert (GTK_IS_TEXT_VIEW (user_data));

    textbuffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (user_data));

    gtk_text_buffer_copy_clipboard (textbuffer,
                    gtk_clipboard_get (GDK_NONE));
}

void
on_button_paste_clicked (GtkButton * button, gpointer user_data)
{
    GtkTextBuffer *textbuffer = NULL;

    g_assert (GTK_IS_TEXT_VIEW (user_data));

    textbuffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (user_data));

    gtk_text_buffer_paste_clipboard (textbuffer,
                     gtk_clipboard_get (GDK_NONE),
                     NULL, TRUE);
}

void
on_button_bold_clicked (GtkButton * button, gpointer user_data)
{
    GtkTextBuffer *textbuffer = NULL;
    GtkTextIter start, end;

    g_assert (GTK_IS_TEXT_VIEW (user_data));

    textbuffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (user_data));

    gtk_text_buffer_get_selection_bounds (textbuffer, &start, &end);

    gtk_text_buffer_apply_tag_by_name (textbuffer, "bold", &start,
                       &end);
}

void
on_button_underline_clicked (GtkButton * button, gpointer user_data)
{
    GtkTextBuffer *textbuffer = NULL;
    GtkTextIter start, end;

    g_assert (GTK_IS_TEXT_VIEW (user_data));

    textbuffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (user_data));

    gtk_text_buffer_get_selection_bounds (textbuffer, &start, &end);

    gtk_text_buffer_apply_tag_by_name (textbuffer, "underline", &start,
                       &end);
}

void
on_button_strikethrough_clicked (GtkButton * button, gpointer user_data)
{
    GtkTextBuffer *textbuffer = NULL;
    GtkTextIter start, end;

    g_assert (GTK_IS_TEXT_VIEW (user_data));

    textbuffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (user_data));

    gtk_text_buffer_get_selection_bounds (textbuffer, &start, &end);

    gtk_text_buffer_apply_tag_by_name (textbuffer, "strike", &start,
                       &end);
}

void
on_button_color_clicked (GtkButton * button, gpointer user_data)
{
    GtkTextBuffer *textbuffer = NULL;
    GtkTextIter start, end;

    g_assert (GTK_IS_TEXT_VIEW (user_data));

    textbuffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (user_data));

    gtk_text_buffer_get_selection_bounds (textbuffer, &start, &end);

    gtk_text_buffer_apply_tag_by_name (textbuffer, "color", &start,
                       &end);
}

void
create_tags (GtkTextBuffer * buffer)
{
    g_assert (GTK_IS_TEXT_BUFFER (buffer));

    gtk_text_buffer_create_tag (buffer, "bold",
                    "weight", PANGO_WEIGHT_BOLD, NULL);
    gtk_text_buffer_create_tag (buffer, "underline",
                    "underline", PANGO_UNDERLINE_SINGLE,
                    NULL);
    gtk_text_buffer_create_tag (buffer, "strike", "strikethrough",
                    TRUE, NULL);
    gtk_text_buffer_create_tag (buffer, "color", "foreground", "blue",
                    NULL);
}

int
main (int argc, char *argv[])
{	
	GladeXML *xml_main_window;
    GtkWidget *textview;
    GtkTextBuffer *buffer;
    
    gtk_init (&argc, &argv);
  
    xml_main_window = glade_xml_new("editor.glade", NULL, NULL);

	textview = glade_xml_get_widget (xml_main_window, "textview1");	
	buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (textview));
    create_tags (buffer);
	
	/* connect signal handlers */
    glade_xml_signal_autoconnect(xml_main_window);
	
	/* start the event loop */
    gtk_main ();
       
    return 0;
}