/* Cursor motion subroutines for GNU Emacs.
Copyright (C) 1985, 1995, 2001, 2002, 2003, 2004,
- 2005, 2006, 2007 Free Software Foundation, Inc.
+ 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
based primarily on public domain code written by Chris Torek
This file is part of GNU Emacs.
-GNU Emacs is free software; you can redistribute it and/or modify
+GNU Emacs 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, or (at your option)
-any later version.
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA. */
+along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <stdio.h>
+#include <setjmp.h>
+
+#include "lisp.h"
+#include "frame.h"
#include "cm.h"
#include "termhooks.h"
+#include "termchar.h"
+
/* For now, don't try to include termcap.h. On some systems,
configure finds a non-standard termcap.h that the main build
return c;
}
+/* The terminal to use for low-level output. */
+struct tty_display_info *current_tty;
+
int
cmputc (c)
char c;
{
- if (termscript)
- fputc (c & 0177, termscript);
- putchar (c & 0177);
+ if (current_tty->termscript)
+ putc (c & 0177, current_tty->termscript);
+ putc (c & 0177, current_tty->output);
return c;
}
*/
static
-at (row, col) {
- curY = row;
- curX = col;
+at (tty, row, col) {
+ curY (tty) = row;
+ curX (tty) = col;
}
/*
*/
static
-addcol (n) {
- curX += n;
+addcol (tty, n) {
+ curX (tty) += n;
/*
* If cursor hit edge of screen, what happened?
* of the last line.
*/
- if (curX == Wcm.cm_cols) {
+ if (curX (tty) == tty->Wcm->cm_cols) {
/*
* Well, if magicwrap, still there, past the edge of the
* screen (!). If autowrap, on the col 0 of the next line.
* Otherwise on last column.
*/
- if (Wcm.cm_magicwrap)
+ if (tty->Wcm->cm_magicwrap)
; /* "limbo" */
- else if (Wcm.cm_autowrap) {
- curX = 0;
- curY++; /* Beware end of screen! */
+ else if (tty->Wcm->cm_autowrap) {
+ curX (tty) = 0;
+ curY (tty) ++; /* Beware end of screen! */
}
else
- curX--;
+ curX (tty)--;
}
}
#endif
* after we reach the last column; this takes us to a known state.
*/
void
-cmcheckmagic ()
+cmcheckmagic (struct tty_display_info *tty)
{
- if (curX == FrameCols)
+ if (curX (tty) == FrameCols (tty))
{
- if (!MagicWrap || curY >= FrameRows - 1)
+ if (!MagicWrap (tty) || curY (tty) >= FrameRows (tty) - 1)
abort ();
- if (termscript)
- putc ('\r', termscript);
- putchar ('\r');
- if (termscript)
- putc ('\n', termscript);
- putchar ('\n');
- curX = 0;
- curY++;
+ if (tty->termscript)
+ putc ('\r', tty->termscript);
+ putc ('\r', tty->output);
+ if (tty->termscript)
+ putc ('\n', tty->termscript);
+ putc ('\n', tty->output);
+ curX (tty) = 0;
+ curY (tty)++;
}
}
*/
void
-cmcostinit ()
+cmcostinit (struct tty_display_info *tty)
{
char *p;
#define COST(x,e) (x ? (cost = 0, tputs (x, 1, e), cost) : BIG)
#define CMCOST(x,e) ((x == 0) ? BIG : (p = tgoto(x, 0, 0), COST(p ,e)))
- Wcm.cc_up = COST (Wcm.cm_up, evalcost);
- Wcm.cc_down = COST (Wcm.cm_down, evalcost);
- Wcm.cc_left = COST (Wcm.cm_left, evalcost);
- Wcm.cc_right = COST (Wcm.cm_right, evalcost);
- Wcm.cc_home = COST (Wcm.cm_home, evalcost);
- Wcm.cc_cr = COST (Wcm.cm_cr, evalcost);
- Wcm.cc_ll = COST (Wcm.cm_ll, evalcost);
- Wcm.cc_tab = Wcm.cm_tabwidth ? COST (Wcm.cm_tab, evalcost) : BIG;
+ tty->Wcm->cc_up = COST (tty->Wcm->cm_up, evalcost);
+ tty->Wcm->cc_down = COST (tty->Wcm->cm_down, evalcost);
+ tty->Wcm->cc_left = COST (tty->Wcm->cm_left, evalcost);
+ tty->Wcm->cc_right = COST (tty->Wcm->cm_right, evalcost);
+ tty->Wcm->cc_home = COST (tty->Wcm->cm_home, evalcost);
+ tty->Wcm->cc_cr = COST (tty->Wcm->cm_cr, evalcost);
+ tty->Wcm->cc_ll = COST (tty->Wcm->cm_ll, evalcost);
+ tty->Wcm->cc_tab = tty->Wcm->cm_tabwidth ? COST (tty->Wcm->cm_tab, evalcost) : BIG;
/*
* These last three are actually minimum costs. When (if) they are
* cursor motion seem to take straight numeric values. --ACT)
*/
- Wcm.cc_abs = CMCOST (Wcm.cm_abs, evalcost);
- Wcm.cc_habs = CMCOST (Wcm.cm_habs, evalcost);
- Wcm.cc_vabs = CMCOST (Wcm.cm_vabs, evalcost);
+ tty->Wcm->cc_abs = CMCOST (tty->Wcm->cm_abs, evalcost);
+ tty->Wcm->cc_habs = CMCOST (tty->Wcm->cm_habs, evalcost);
+ tty->Wcm->cc_vabs = CMCOST (tty->Wcm->cm_vabs, evalcost);
#undef CMCOST
#undef COST
*/
static int
-calccost (srcy, srcx, dsty, dstx, doit)
- int srcy, srcx, dsty, dstx, doit;
+calccost (struct tty_display_info *tty,
+ int srcy, int srcx, int dsty, int dstx, int doit)
{
register int deltay,
deltax,
don't believe the cursor position: give up here
and force use of absolute positioning. */
- if (curX == Wcm.cm_cols)
+ if (curX (tty) == tty->Wcm->cm_cols)
goto fail;
totalcost = 0;
if ((deltay = dsty - srcy) == 0)
goto x;
if (deltay < 0)
- p = Wcm.cm_up, c = Wcm.cc_up, deltay = -deltay;
+ p = tty->Wcm->cm_up, c = tty->Wcm->cc_up, deltay = -deltay;
else
- p = Wcm.cm_down, c = Wcm.cc_down;
+ p = tty->Wcm->cm_down, c = tty->Wcm->cc_down;
if (c == BIG) { /* caint get thar from here */
if (doit)
printf ("OOPS");
totalcost = c * deltay;
if (doit)
while (--deltay >= 0)
- tputs (p, 1, cmputc);
+ emacs_tputs (tty, p, 1, cmputc);
x:
if ((deltax = dstx - srcx) == 0)
goto done;
if (deltax < 0) {
- p = Wcm.cm_left, c = Wcm.cc_left, deltax = -deltax;
+ p = tty->Wcm->cm_left, c = tty->Wcm->cc_left, deltax = -deltax;
goto dodelta; /* skip all the tab junk */
}
/* Tabs (the toughie) */
- if (Wcm.cc_tab >= BIG || !Wcm.cm_usetabs)
+ if (tty->Wcm->cc_tab >= BIG || !tty->Wcm->cm_usetabs)
goto olddelta; /* forget it! */
/*
* we will put into tabx (for ntabs) and tab2x (for n2tabs)).
*/
- ntabs = (deltax + srcx % Wcm.cm_tabwidth) / Wcm.cm_tabwidth;
+ ntabs = (deltax + srcx % tty->Wcm->cm_tabwidth) / tty->Wcm->cm_tabwidth;
n2tabs = ntabs + 1;
- tabx = (srcx / Wcm.cm_tabwidth + ntabs) * Wcm.cm_tabwidth;
- tab2x = tabx + Wcm.cm_tabwidth;
+ tabx = (srcx / tty->Wcm->cm_tabwidth + ntabs) * tty->Wcm->cm_tabwidth;
+ tab2x = tabx + tty->Wcm->cm_tabwidth;
- if (tab2x >= Wcm.cm_cols) /* too far (past edge) */
+ if (tab2x >= tty->Wcm->cm_cols) /* too far (past edge) */
n2tabs = 0;
/*
* for using n2tabs, then pick the minimum.
*/
- /* cost for ntabs + cost for right motion */
- tabcost = ntabs ? ntabs * Wcm.cc_tab + (dstx - tabx) * Wcm.cc_right
+ /* cost for ntabs + cost for right motion */
+ tabcost = ntabs ? ntabs * tty->Wcm->cc_tab + (dstx - tabx) * tty->Wcm->cc_right
: BIG;
- /* cost for n2tabs + cost for left motion */
- c = n2tabs ? n2tabs * Wcm.cc_tab + (tab2x - dstx) * Wcm.cc_left
+ /* cost for n2tabs + cost for left motion */
+ c = n2tabs ? n2tabs * tty->Wcm->cc_tab + (tab2x - dstx) * tty->Wcm->cc_left
: BIG;
if (c < tabcost) /* then cheaper to overshoot & back up */
* See if tabcost is less than just moving right
*/
- if (tabcost < (deltax * Wcm.cc_right)) {
+ if (tabcost < (deltax * tty->Wcm->cc_right)) {
totalcost += tabcost; /* use the tabs */
if (doit)
while (--ntabs >= 0)
- tputs (Wcm.cm_tab, 1, cmputc);
+ emacs_tputs (tty, tty->Wcm->cm_tab, 1, cmputc);
srcx = tabx;
}
goto done;
olddelta:
if (deltax > 0)
- p = Wcm.cm_right, c = Wcm.cc_right;
+ p = tty->Wcm->cm_right, c = tty->Wcm->cc_right;
else
- p = Wcm.cm_left, c = Wcm.cc_left, deltax = -deltax;
+ p = tty->Wcm->cm_left, c = tty->Wcm->cc_left, deltax = -deltax;
dodelta:
if (c == BIG) { /* caint get thar from here */
totalcost += c * deltax;
if (doit)
while (--deltax >= 0)
- tputs (p, 1, cmputc);
+ emacs_tputs (tty, p, 1, cmputc);
done:
return totalcost;
}
#define USECR 3
void
-cmgoto (row, col)
+cmgoto (tty, row, col)
+ struct tty_display_info *tty;
int row, col;
{
int homecost,
*dcm;
/* First the degenerate case */
- if (row == curY && col == curX) /* already there */
+ if (row == curY (tty) && col == curX (tty)) /* already there */
return;
- if (curY >= 0 && curX >= 0)
+ if (curY (tty) >= 0 && curX (tty) >= 0)
{
/* We may have quick ways to go to the upper-left, bottom-left,
* start-of-line, or start-of-next-line. Or it might be best to
* start where we are. Examine the options, and pick the cheapest.
*/
- relcost = calccost (curY, curX, row, col, 0);
+ relcost = calccost (tty, curY (tty), curX (tty), row, col, 0);
use = USEREL;
- if ((homecost = Wcm.cc_home) < BIG)
- homecost += calccost (0, 0, row, col, 0);
+ if ((homecost = tty->Wcm->cc_home) < BIG)
+ homecost += calccost (tty, 0, 0, row, col, 0);
if (homecost < relcost)
- relcost = homecost, use = USEHOME;
- if ((llcost = Wcm.cc_ll) < BIG)
- llcost += calccost (Wcm.cm_rows - 1, 0, row, col, 0);
+ relcost = homecost, use = USEHOME;
+ if ((llcost = tty->Wcm->cc_ll) < BIG)
+ llcost += calccost (tty, tty->Wcm->cm_rows - 1, 0, row, col, 0);
if (llcost < relcost)
- relcost = llcost, use = USELL;
- if ((crcost = Wcm.cc_cr) < BIG) {
- if (Wcm.cm_autolf)
- if (curY + 1 >= Wcm.cm_rows)
- crcost = BIG;
+ relcost = llcost, use = USELL;
+ if ((crcost = tty->Wcm->cc_cr) < BIG) {
+ if (tty->Wcm->cm_autolf)
+ if (curY (tty) + 1 >= tty->Wcm->cm_rows)
+ crcost = BIG;
else
- crcost += calccost (curY + 1, 0, row, col, 0);
+ crcost += calccost (tty, curY (tty) + 1, 0, row, col, 0);
else
- crcost += calccost (curY, 0, row, col, 0);
+ crcost += calccost (tty, curY (tty), 0, row, col, 0);
}
if (crcost < relcost)
relcost = crcost, use = USECR;
- directcost = Wcm.cc_abs, dcm = Wcm.cm_abs;
- if (row == curY && Wcm.cc_habs < BIG)
- directcost = Wcm.cc_habs, dcm = Wcm.cm_habs;
- else if (col == curX && Wcm.cc_vabs < BIG)
- directcost = Wcm.cc_vabs, dcm = Wcm.cm_vabs;
+ directcost = tty->Wcm->cc_abs, dcm = tty->Wcm->cm_abs;
+ if (row == curY (tty) && tty->Wcm->cc_habs < BIG)
+ directcost = tty->Wcm->cc_habs, dcm = tty->Wcm->cm_habs;
+ else if (col == curX (tty) && tty->Wcm->cc_vabs < BIG)
+ directcost = tty->Wcm->cc_vabs, dcm = tty->Wcm->cm_vabs;
}
else
{
directcost = 0, relcost = 100000;
- dcm = Wcm.cm_abs;
+ dcm = tty->Wcm->cm_abs;
}
/*
{
/* compute REAL direct cost */
cost = 0;
- p = dcm == Wcm.cm_habs ? tgoto (dcm, row, col) :
- tgoto (dcm, col, row);
- tputs (p, 1, evalcost);
+ p = (dcm == tty->Wcm->cm_habs
+ ? tgoto (dcm, row, col)
+ : tgoto (dcm, col, row));
+ emacs_tputs (tty, p, 1, evalcost);
if (cost <= relcost)
{ /* really is cheaper */
- tputs (p, 1, cmputc);
- curY = row, curX = col;
+ emacs_tputs (tty, p, 1, cmputc);
+ curY (tty) = row, curX (tty) = col;
return;
}
}
switch (use)
{
case USEHOME:
- tputs (Wcm.cm_home, 1, cmputc);
- curY = 0, curX = 0;
+ emacs_tputs (tty, tty->Wcm->cm_home, 1, cmputc);
+ curY (tty) = 0, curX (tty) = 0;
break;
case USELL:
- tputs (Wcm.cm_ll, 1, cmputc);
- curY = Wcm.cm_rows - 1, curX = 0;
+ emacs_tputs (tty, tty->Wcm->cm_ll, 1, cmputc);
+ curY (tty) = tty->Wcm->cm_rows - 1, curX (tty) = 0;
break;
case USECR:
- tputs (Wcm.cm_cr, 1, cmputc);
- if (Wcm.cm_autolf)
- curY++;
- curX = 0;
+ emacs_tputs (tty, tty->Wcm->cm_cr, 1, cmputc);
+ if (tty->Wcm->cm_autolf)
+ curY (tty)++;
+ curX (tty) = 0;
break;
}
- (void) calccost (curY, curX, row, col, 1);
- curY = row, curX = col;
+ (void) calccost (tty, curY (tty), curX (tty), row, col, 1);
+ curY (tty) = row, curX (tty) = col;
}
/* Clear out all terminal info.
*/
void
-Wcm_clear ()
+Wcm_clear (struct tty_display_info *tty)
{
- bzero (&Wcm, sizeof Wcm);
+ bzero (tty->Wcm, sizeof (struct cm));
UP = 0;
BC = 0;
}
*/
int
-Wcm_init ()
+Wcm_init (struct tty_display_info *tty)
{
#if 0
- if (Wcm.cm_abs && !Wcm.cm_ds)
+ if (tty->Wcm->cm_abs && !tty->Wcm->cm_ds)
return 0;
#endif
- if (Wcm.cm_abs)
+ if (tty->Wcm->cm_abs)
return 0;
/* Require up and left, and, if no absolute, down and right */
- if (!Wcm.cm_up || !Wcm.cm_left)
+ if (!tty->Wcm->cm_up || !tty->Wcm->cm_left)
return - 1;
- if (!Wcm.cm_abs && (!Wcm.cm_down || !Wcm.cm_right))
+ if (!tty->Wcm->cm_abs && (!tty->Wcm->cm_down || !tty->Wcm->cm_right))
return - 1;
/* Check that we know the size of the screen.... */
- if (Wcm.cm_rows <= 0 || Wcm.cm_cols <= 0)
+ if (tty->Wcm->cm_rows <= 0 || tty->Wcm->cm_cols <= 0)
return - 2;
return 0;
}