// src/graphicalterminalio.cc - Copyright 2005, 2006, University
//               of Padova, dept. of Pure and Applied
//               Mathematics
//
// This file is part of SGPEMv2.
//
// This 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.
//
// SGPEMv2 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 SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

#include "config.h"
#include "gettext.h"

#include "graphical_terminal_io.hh"

#include <glibmm/thread.h>
#include <gtkmm/button.h>
#include <gtkmm/textview.h>
#include <glibmm/ustring.h>

#include <algorithm>
#include <utility>

using namespace sgpem;
using namespace std;
using Glib::ustring;
using Glib::Thread;

GraphicalTerminalIO::GraphicalTerminalIO(TextSimulation* sim)
	:_sim(sim)
{
  using namespace Gtk;
  
  set_title(_("Textual Simulation Log"));
  set_default_size(500,300);

  Gtk::Box* mainbox = manage(new VBox());
  add(*mainbox);
  
  _text_output.set_editable(false);
  _text_output.modify_font(Pango::FontDescription("monospace"));
  mainbox->pack_start(_text_output);

  Gtk::Box* cmdbox = manage(new HBox());
  mainbox->pack_end(*cmdbox, false, false);

  _text_input.signal_key_press_event().connect(sigc::mem_fun(*this, &GraphicalTerminalIO::_on_input_commit));
  cmdbox->pack_start(_text_input);

  _send = manage(new Button(_("Send Command")));
  _send->signal_clicked().connect(sigc::mem_fun(*this, &GraphicalTerminalIO::onSend));
  cmdbox->pack_start(*_send, false, true);
  
  _text_input.grab_focus();
  
  //this button is the default widget
  //GTK_WIDGET_SET_FLAGS ( _send , GTK_CAN_DEFAULT);
  //_send->grab_default();

  show_all_children();
}

GraphicalTerminalIO::~GraphicalTerminalIO() 
{}

void
GraphicalTerminalIO::onSend()
{

	pair< pair<TextSimulation*, IOManager*>,  const ustring >  p(
			pair<TextSimulation*, IOManager*>(_sim, this), _text_input.get_text());

	Thread::create(	sigc::bind(&TextSimulation::parse_command, p), true);	
	
	_text_input.set_text("");
	_text_input.grab_focus();
}

uint 
GraphicalTerminalIO::write_buffer(const Glib::ustring& buffer)
{
	Gtk::TextBuffer::iterator i = _text_output.get_buffer()->end();
	_text_output.get_buffer()->insert(i, buffer);
	i = _text_output.get_buffer()->end();
	//_text_output.scroll_to(i); // would need a mutex!
	return buffer.size();
}

Glib::ustring
GraphicalTerminalIO::read_command() 
{
  using Glib::ustring;
  static const ustring whitespaces = " \r\b\n\t\a";
                             // are there any other wspaces?
  
  ustring command = _text_input.get_text();
  
  // trimming:
  uint f = command.find_first_not_of(whitespaces);
  uint l = command.find_last_not_of(whitespaces);
  if(f == ustring::npos)
	  return "";
  
  return command.substr(f,l-f+1);	
}

bool
GraphicalTerminalIO::is_full_duplex()
{
	return true;
}

bool 
GraphicalTerminalIO::_on_input_commit(GdkEventKey* event)
{
    // We should use Gdk::GDK_Return here, but it doesn't work for 
    // some reason!!
    if((event->keyval & 0xFF0D) == 0xFF0D )
    {
	onSend();
	return true;
    }
    return true;
}