test.vala

// modules: Gtk
// compile: valac --pkg gtk+-3.0 test.vala

using Gtk;

public class TextFileViewer : Window {

private string input1 = "line 1 column 2 - Error: lalala\n"+
"line 96 column 81 - Warning: inserting implicit <p>\n"+
"line 134 column 1 - Warning: inserting implicit <p>\n"+
"line 148 column 69 - Warning: replacing unexpected font with </font>\n"+
"line 151 column 67 - Warning: replacing unexpected em with </em>\n"+
"line 162 column 7 - Warning: inserting implicit <p>\n"+
"line 162 column 11 - Warning: inserting implicit <p>\n"+
"line 170 column 1 - Warning: inserting implicit <p>\n";
private string input2 ="          \n"+ //specifically it needs 11 characters before the first "line" to be correct
"line 1 column 2 - Error: lalala\n"+
"line 96 column 81 - Warning: inserting implicit <p>\n"+
"line 134 column 1 - Warning: inserting implicit <p>\n"+
"line 148 column 69 - Warning: replacing unexpected font with </font>\n"+
"line 151 column 67 - Warning: replacing unexpected em with </em>\n"+
"line 162 column 7 - Warning: inserting implicit <p>\n"+
"line 162 column 11 - Warning: inserting implicit <p>\n"+
"line 170 column 1 - Warning: inserting implicit <p>\n";

    private TextView text_view;
    //private Entry entry;
    private Entry regex_entry;
    private TreeView message_output;
    private Gtk.ListStore list_store;

    private Regex re;

    public TextFileViewer () {
        this.title = "Text File Viewer";
        this.window_position = WindowPosition.CENTER;
        set_default_size (800, 300);

        var toolbar = new Toolbar ();
        toolbar.get_style_context ().add_class (STYLE_CLASS_PRIMARY_TOOLBAR);

        var run_button = new Button.with_label ("Run");
        run_button.clicked.connect (on_run_clicked);
        var button_item = new ToolItem ();
        button_item.add (run_button);
        toolbar.add (button_item);

        var menu_button = new MenuButton ();
        menu_button.set_label ("Select input");

        var menu = new Gtk.Menu ();
        menu_button.set_popup (menu);

        var menuitem1 = new Gtk.MenuItem.with_label ("input1");
        menuitem1.activate.connect (on_menuitem_activated);
        menu.add (menuitem1);

        var menuitem2 = new Gtk.MenuItem.with_label ("input2");
        menuitem2.activate.connect (on_menuitem_activated);
        menu.add (menuitem2);
        menu.show_all ();

        var select_input_button_item = new ToolItem();
        select_input_button_item.add (menu_button);
        toolbar.add (select_input_button_item);
        this.regex_entry = new Entry();

        var regex_item = new ToolItem();
        regex_item.add (regex_entry);
        toolbar.add(regex_item);
        regex_entry.text = "line (?<line>\\d+) column (?<col>\\d+) -"+
" ((?<err>Error)|(?<war>Warning)): (?<message>.*)";
        regex_item.set_expand(true);

        this.text_view = new TextView ();
        this.text_view.editable = true;
        this.text_view.cursor_visible = true;
        this.text_view.buffer.text = input1;

        var scroll = new ScrolledWindow (null, null);
        scroll.set_policy (PolicyType.AUTOMATIC, PolicyType.AUTOMATIC);
        scroll.add (this.text_view);

        var status_window = new ScrolledWindow (null, null);
        status_window.set_policy (PolicyType.AUTOMATIC, PolicyType.AUTOMATIC);

        this.list_store = new Gtk.ListStore (4,typeof (string), typeof (int), typeof (int),typeof (string));
        Gtk.TreeIter iter;
        list_store.append (out iter);
        list_store.set (iter, 0, "Error",1, 12,
                         2, 2, 3, "error unkown");
        this.message_output = new Gtk.TreeView.with_model (list_store);
        status_window.add (message_output);
        Gtk.CellRendererText cell = new Gtk.CellRendererText ();
        message_output.insert_column_with_attributes (-1, "Type", cell, "text", 0);
        message_output.insert_column_with_attributes (-1, "Line", cell, "text", 1);
        message_output.insert_column_with_attributes (-1, "Column", cell, "text", 2);
        message_output.insert_column_with_attributes (-1, "Message", cell, "text", 3);
        var container = new Grid();
        container.attach (toolbar,0,0,1,1);
        container.attach (scroll,0,1,1,1);
        container.attach (status_window,0,2,1,1);
        toolbar.hexpand = true;

        scroll.vexpand = true;
        status_window.set_min_content_height(120);
        add (container);
        show_all ();
    }

    private void on_menuitem_activated (Gtk.MenuItem menuitem) {
    if (menuitem.get_label() == "input1") {
        this.text_view.buffer.text = input1;
    } else {
        this.text_view.buffer.text = input2;
    }
}
    private void on_run_clicked () {

        if (regex_entry.text.length > 0) {

            try {
                re = new Regex(regex_entry.text);
                MatchInfo match;

                this.list_store.clear ();
                Gtk.TreeIter iter;
                for (bool match_exist = re.match(this.text_view.buffer.text, 0,
out match); match_exist == true; match_exist = match.next()) {

                    warning ("String searched :" + match.get_string () );
                    string? type;
                    if (match.fetch_named ("err")!= null && match.fetch_named ("err").length > 0 ) {
                        type = match.fetch_named ("err");
                    } else if (match.fetch_named ("war")!= null && match.fetch_named ("war").length > 0 ) {
                        type = match.fetch_named ("war");
                    }else if (match.fetch_named ("inf")!= null && match.fetch_named ("inf").length > 0 ) {
                        type = match.fetch_named ("inf");
                    }else {
                        type = "";
                    }

                    this.list_store.append (out iter);
                    warning ("line %s, column %s\n", match.fetch_named("line") ?? "-99", match.fetch_named("col") ?? "-99");
                    list_store.set (iter, 0, type.dup (),1, int.parse(match.fetch_named("line")),
                        2, int.parse(match.fetch_named("col")), 3, match.fetch_named("message"));
                }

            } catch (RegexError er) {
                if (er is RegexError.COMPILE)
                    warning ("failed to compile");
                if (er is RegexError.INTERNAL)
                    warning ("internal error play cool");
                if (er is RegexError.UNMATCHED_PARENTHESIS)
                    warning ("Bad day");
                warning ( er.message);
            }
        }
    }

    public static int main (string [] args) {
        Gtk.init (ref args);

        var window = new TextFileViewer();
        window.destroy.connect(Gtk.main_quit);
        window.show_all();
        Gtk.main();
        return 0;
    }
}