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/* term.cxx
$Id: term.cxx,v 1.3 1998/09/07 00:49:39 elf Exp $
written by Marc Singer
27 July 1997
This file is part of the project CurVeS. See the file README for
more information.
Copyright (C) 1997 Marc Singer
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
in a file called COPYING along with this program; if not, write to
the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
02139, USA.
-----------
DESCRIPTION
-----------
Console or terminal I/O routines. Upon this foundation will be
built windowing. Beneath it is the terminal capabilities.
*/
#include "std.h"
#include "termcap.h"
#include "term.h"
#define CB_BUFFER_MAX (4*1024)
Termcap LTerm::g_termcap;
/* LTerm::set_attribute
is one of the more complex functions in LTerm because of the
unpredictability of the termcap features. For example, some
terminals implement sequences to enable attributes individually,
but can only disable them as a group. We do our best here to make
sure that we send an optimal sequence to the terminal to change the
settings as requested.
The important thing to notice is that the current attribute value
may change during this update. Resetting bold may require
reasserting other attributes that were cleared with bold.
*/
void LTerm::set_attribute (unsigned16 attribute, unsigned16 mask)
{
attribute = ((m_attribute & ~mask) | (attribute & mask));
// Map bright colors to emboldend ones
if (mask & attrFgBright)
attribute = (attribute & ~attrBold)
| ((attribute & attrFgBright) ? attrBold : 0);
// Disable attributes first
if (!(attribute & attrBold) && (m_attribute & attrBold)) {
m_cb += g_termcap.compose (termcapEndMode, m_pb + m_cb);
m_attribute &= ~(attrAllMode & ~attrBold);
}
if (!(attribute & attrUnderline) && (m_attribute & attrUnderline)) {
if (g_termcap.has (termcapEndUnderline))
m_cb += g_termcap.compose (termcapEndUnderline, m_pb + m_cb);
else {
m_cb += g_termcap.compose (termcapEndMode, m_pb + m_cb);
m_attribute &= ~(attrAllMode & ~attrUnderline);
}
}
if (!(attribute & attrInverse) && (m_attribute & attrInverse)) {
m_cb += g_termcap.compose (termcapEndMode, m_pb + m_cb);
m_attribute &= ~(attrAllMode & ~attrInverse);
}
if (!(attribute & attrStandout) && (m_attribute & attrStandout)) {
if (g_termcap.has (termcapEndStandout))
m_cb += g_termcap.compose (termcapEndStandout, m_pb + m_cb);
else {
m_cb += g_termcap.compose (termcapEndMode, m_pb + m_cb);
m_attribute &= ~(attrAllMode & ~attrStandout);
}
}
if (!(attribute & attrBlink) && (m_attribute & attrBlink)) {
m_cb += g_termcap.compose (termcapEndMode, m_pb + m_cb);
m_attribute &= ~(attrAllMode & ~attrBlink);
}
// Enable missing attributes
if ((attribute & attrBold) && !(m_attribute & attrBold))
m_cb += g_termcap.compose (termcapStartBold, m_pb + m_cb);
if ((attribute & attrUnderline) && !(m_attribute & attrUnderline))
m_cb += g_termcap.compose (termcapStartUnderline, m_pb + m_cb);
if ((attribute & attrInverse) && !(m_attribute & attrInverse))
m_cb += g_termcap.compose (termcapStartInverse, m_pb + m_cb);
if ((attribute & attrStandout) && !(m_attribute & attrStandout))
m_cb += g_termcap.compose (termcapStartStandout, m_pb + m_cb);
if ((attribute & attrBlink) && !(m_attribute & attrBlink))
m_cb += g_termcap.compose (termcapStartBlink, m_pb + m_cb);
// Set color attribute
if ((attribute & attrFgMask) != (m_attribute & attrFgMask)) {
unsigned16 color = (attribute & attrFgMask);
if (color == attrFgDefault)
m_cb += g_termcap.compose (termcapSetAnsiForeground, m_pb + m_cb, 9);
else
m_cb += g_termcap.compose (termcapSetAnsiForeground, m_pb + m_cb,
(color - attrFgFirst) >> attrFgShift);
}
if ((attribute & attrBgMask) != (m_attribute & attrBgMask)) {
unsigned16 color = (attribute & attrBgMask);
if (color == attrBgDefault)
m_cb += g_termcap.compose (termcapSetAnsiBackground, m_pb + m_cb, 9);
else
m_cb += g_termcap.compose (termcapSetAnsiBackground, m_pb + m_cb,
(color - attrBgFirst) >> attrBgShift);
}
m_attribute = attribute;
}
void LTerm::flush (void)
{
if (m_cb) {
write (m_fh, m_pb, m_cb);
memset (m_pb, 0, m_cb); // *** FIXME debug code
m_cb = 0;
}
}
void LTerm::init (void)
{
g_termcap.init ();
if ((m_pb = (char*) malloc (CB_BUFFER_MAX)))
m_cbMax = CB_BUFFER_MAX;
m_fh = 1; // Standard out
}
void LTerm::release_this (void)
{
if (m_pb) {
free (m_pb);
m_pb = NULL;
m_cbMax = 0;
}
}
int LTerm::sprintf (char* pb, ...)
{
va_list ap;
va_start (ap, pb);
int result = vsprintf (m_pb + m_cb, pb, ap);
va_end (ap);
m_cb += result;
return result;
}
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