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/** \file terminal.cc */
// Copyright (C) 2010 Daniel Burrows
//
// 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; see the file COPYING. If not, write to
// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
// Local includes:
#include "terminal.h"
#include <aptitude.h>
// System includes:
#include <boost/make_shared.hpp>
#include <boost/shared_ptr.hpp>
#include <cwidget/generic/util/transcode.h>
#include <iostream>
#include <sys/ioctl.h>
using boost::make_shared;
using boost::shared_ptr;
using cwidget::util::transcode;
std::string StdinEOFException::errmsg() const
{
return _("Unexpected end-of-file on standard input");
}
namespace aptitude
{
namespace cmdline
{
namespace
{
// \todo Consider using a signal handler to catch window resizes
// -- watch out for what happens if the curses UI starts up,
// we'll have to tear down the handler, and be sure to handle
// memory barriers.
class terminal_impl : public terminal_io
{
public:
bool output_is_a_terminal();
void write_text(const std::wstring &msg);
void move_to_beginning_of_line();
void flush();
std::wstring prompt_for_input(const std::wstring &msg);
unsigned int get_screen_width();
int wcwidth(wchar_t ch);
};
bool terminal_impl::output_is_a_terminal()
{
return isatty(1);
}
void terminal_impl::write_text(const std::wstring &msg)
{
std::cout << transcode(msg);
}
void terminal_impl::move_to_beginning_of_line()
{
std::cout << '\r';
}
void terminal_impl::flush()
{
std::cout << std::flush;
}
std::wstring terminal_impl::prompt_for_input(const std::wstring &msg)
{
std::cout << transcode(msg) << std::flush;
std::string rval;
char buf[1024];
std::cin.getline(buf, 1023);
rval += buf;
while(!std::cin && !std::cin.eof())
{
std::cin.getline(buf, 1023);
rval += buf;
}
if(!std::cin)
throw StdinEOFException();
return transcode(rval);
}
unsigned int terminal_impl::get_screen_width()
{
// Ripped from apt-get, which ripped it from GNU ls
winsize ws;
if (ioctl(1, TIOCGWINSZ, &ws) != -1 && ws.ws_col >= 5)
return ws.ws_col;
else
// \todo Should we distinguish between "can't read a
// terminal size" and "read a tiny terminal size"?
return 80;
}
int terminal_impl::wcwidth(wchar_t ch)
{
return ::wcwidth(ch);
}
}
terminal_input::~terminal_input()
{
}
terminal_locale::~terminal_locale()
{
}
terminal_metrics::~terminal_metrics()
{
}
terminal_output::~terminal_output()
{
}
shared_ptr<terminal_io> create_terminal()
{
return make_shared<terminal_impl>();
}
}
}
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