Text encloser

/* When enabled, plugin wraps selected text in single/double quotes, parentheses,
 * or square brackets.
 *
 * Build with:
 * gcc -c surroundText.c -fPIC `pkg-config --cflags geany`
 * gcc surroundText.o -o surroundText.so -shared `pkg-config --libs geany`
 *
 */

#include <geanyplugin.h>

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

PLUGIN_VERSION_CHECK (147);
PLUGIN_SET_INFO ("Text Encloser",
    "Encloses selected text with single quotes, double quotes, or parentheses.",
    "0.1", "Alex M.");

gboolean on_editor_notify (GObject *, GeanyEditor *, SCNotification *, gpointer);

gint num_selected = 0;

void plugin_init(GeanyData *data)
{
    plugin_signal_connect (geany_plugin, NULL, "editor_notify", FALSE, (GCallback)
        &on_editor_notify, NULL);

}

/* Keeps track of current selection length.  If a character is typed and the selection
 * length was > 0 and the character was a quote, bracket, or parenthesis, surround the
 * selected text with the appropriate characters: Undo the character insert which replaced
 * the selected text, insert the enclosing characters before and after selected text
 * and move cursor to after second enclosing character.
 */

gboolean on_editor_notify (GObject *object, GeanyEditor *editor, SCNotification *nt, gpointer data)
{
    gchar prior_char [2];   /* Zero-terminated arrays for enclosing chars */
    gchar end_char [2];
    prior_char [1] = 0;
    end_char [1] = 0;

    if (nt->nmhdr.code == SCN_UPDATEUI && nt->updated == SC_UPDATE_SELECTION)
        num_selected = sci_get_selected_text_length (editor->sci);

    else if (nt->nmhdr.code == SCN_CHARADDED)
    {
        if ((nt->ch == 0x27 || nt->ch == 0x22 || nt->ch == 0x28 || nt->ch == 0x5B) && num_selected > 1)
        {
            prior_char [0] = nt->ch;
            end_char [0] = nt->ch;
            if (nt->ch == 0x28)
                end_char [0] = 0x29;
            else if (nt->ch == 0x5B)
                end_char [0] = 0x5D;

            sci_send_command (editor->sci, SCI_UNDO);
            sci_insert_text (editor->sci, sci_get_current_position (editor->sci) - num_selected + 1,
                prior_char);
            sci_insert_text (editor->sci, sci_get_current_position (editor->sci), end_char);
            sci_set_current_position (editor->sci, sci_get_current_position (editor->sci) + 1, TRUE);

            num_selected = 0;
            return TRUE;
        }
        num_selected = 0;
    }

    else if (nt->nmhdr.code == SCN_MODIFIED && (nt->modificationType & SC_MOD_DELETETEXT) ==
        SC_MOD_DELETETEXT) {
        num_selected = 0;
    }

    return FALSE;
}

void plugin_cleanup(void)
{

}