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textviewer.cc

/*
    Copyright (C) 1999 Paul Barton-Davis 
    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., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id: textviewer.cc,v 1.5 2004/05/19 14:30:29 pauld Exp $
*/

#include <string>
#include <fstream>

#include <gdk/gdk.h>
#include <gtkmmext/textviewer.h>

#include "i18n.h"

using namespace std;
using namespace Gtkmmext;

TextViewer::TextViewer (size_t xsize, size_t ysize) :
      Gtk::Window (GTK_WINDOW_TOPLEVEL),
      Transmitter (Transmitter::Info), /* channel arg is irrelevant */
      dismiss (_("Close"))
{
      set_usize (xsize, ysize);

      set_title ("Text Viewer");
      set_name ("TextViewer");
      set_policy (TRUE, TRUE, FALSE);
      set_border_width (0);

      vbox1.set_homogeneous (false);
      vbox1.set_spacing (0);
      add (vbox1);
      vbox1.show ();

      vbox2.set_homogeneous (false);
      vbox2.set_spacing (10);
      //vbox2.set_border_width (10);

      vbox1.pack_start (vbox2, true, true, 0);
      vbox2.show ();

      vbox2.pack_start (scrollwin, TRUE, TRUE, 0);
      scrollwin.set_policy (GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);
      scrollwin.show ();

      etext.set_editable (false);
      etext.set_word_wrap (true);
      scrollwin.add (etext);
      etext.show ();

      vbox1.pack_start (dismiss, false, false, 0);
      dismiss.show ();

      dismiss.released.connect(hide.slot());
}

void
TextViewer::insert_file (const string &path)

{
      char buf[1024];
      ifstream f (path.c_str());
      Gtk::Text_Helpers::Context context;

      if (!f) {
            return;
      }

      etext.freeze ();

      while (f) {
            f.read (buf, sizeof (buf));

            if (f.gcount()) {
                  buf[f.gcount()] = '\0';
                  string foo (buf);
                  etext.insert (context, foo);
            }
      }

      etext.thaw ();
}

void
TextViewer::scroll_to_bottom ()

{
        GtkAdjustment *adj;

      adj = (GtkAdjustment *) scrollwin.get_vadjustment()->gtkobj();
      gtk_adjustment_set_value (adj, MAX(0,(adj->upper - adj->page_size)));
}
      
void
TextViewer::deliver ()

{
      char buf[1024];
      Gtk::Text_Helpers::Context context;

      while (!eof()) {
            read (buf, sizeof (buf));
            buf[gcount()] = '\0';
            string foo (buf);
            etext.insert (context, foo);
      }
      scroll_to_bottom ();
      clear ();
}

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