#include <config.h>
#include <stdio.h>
#include "cm.h"
#include "termhooks.h"
#if defined HAVE_TERMCAP_H && 0
#include <termcap.h>
#else
extern void tputs P_ ((const char *, int, int (*)(int)));
extern char *tgoto P_ ((const char *, int, int));
#endif
#define BIG 9999
extern char *BC, *UP;
int cost;
int
evalcost (c)
char c;
{
cost++;
return c;
}
int
cmputc (c)
char c;
{
if (termscript)
fputc (c & 0177, termscript);
putchar (c & 0177);
return c;
}
#if 0
static
at (row, col) {
curY = row;
curX = col;
}
static
addcol (n) {
curX += n;
if (curX == Wcm.cm_cols) {
if (Wcm.cm_magicwrap)
;
else if (Wcm.cm_autowrap) {
curX = 0;
curY++;
}
else
curX--;
}
}
#endif
void
cmcheckmagic ()
{
if (curX == FrameCols)
{
if (!MagicWrap || curY >= FrameRows - 1)
abort ();
if (termscript)
putc ('\r', termscript);
putchar ('\r');
if (termscript)
putc ('\n', termscript);
putchar ('\n');
curX = 0;
curY++;
}
}
void
cmcostinit ()
{
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;
Wcm.cc_abs = CMCOST (Wcm.cm_abs, evalcost);
Wcm.cc_habs = CMCOST (Wcm.cm_habs, evalcost);
Wcm.cc_vabs = CMCOST (Wcm.cm_vabs, evalcost);
#undef CMCOST
#undef COST
}
static int
calccost (srcy, srcx, dsty, dstx, doit)
{
register int deltay,
deltax,
c,
totalcost;
int ntabs,
n2tabs,
tabx,
tab2x,
tabcost;
register char *p;
if (curX == 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;
else
p = Wcm.cm_down, c = Wcm.cc_down;
if (c == BIG) {
if (doit)
printf ("OOPS");
return c;
}
totalcost = c * deltay;
if (doit)
while (--deltay >= 0)
tputs (p, 1, cmputc);
x:
if ((deltax = dstx - srcx) == 0)
goto done;
if (deltax < 0) {
p = Wcm.cm_left, c = Wcm.cc_left, deltax = -deltax;
goto dodelta;
}
if (Wcm.cc_tab >= BIG || !Wcm.cm_usetabs)
goto olddelta;
ntabs = (deltax + srcx % Wcm.cm_tabwidth) / Wcm.cm_tabwidth;
n2tabs = ntabs + 1;
tabx = (srcx / Wcm.cm_tabwidth + ntabs) * Wcm.cm_tabwidth;
tab2x = tabx + Wcm.cm_tabwidth;
if (tab2x >= Wcm.cm_cols)
n2tabs = 0;
tabcost = ntabs ? ntabs * Wcm.cc_tab + (dstx - tabx) * Wcm.cc_right
: BIG;
c = n2tabs ? n2tabs * Wcm.cc_tab + (tab2x - dstx) * Wcm.cc_left
: BIG;
if (c < tabcost)
ntabs = n2tabs, tabcost = c, tabx = tab2x;
if (tabcost >= BIG)
goto newdelta;
if (tabcost < (deltax * Wcm.cc_right)) {
totalcost += tabcost;
if (doit)
while (--ntabs >= 0)
tputs (Wcm.cm_tab, 1, cmputc);
srcx = tabx;
}
newdelta:
if ((deltax = dstx - srcx) == 0)
goto done;
olddelta:
if (deltax > 0)
p = Wcm.cm_right, c = Wcm.cc_right;
else
p = Wcm.cm_left, c = Wcm.cc_left, deltax = -deltax;
dodelta:
if (c == BIG) {
fail:
if (doit)
printf ("OOPS");
return BIG;
}
totalcost += c * deltax;
if (doit)
while (--deltax >= 0)
tputs (p, 1, cmputc);
done:
return totalcost;
}
#if 0
losecursor ()
{
curY = -1;
}
#endif
#define USEREL 0
#define USEHOME 1
#define USELL 2
#define USECR 3
void
cmgoto (row, col)
{
int homecost,
crcost,
llcost,
relcost,
directcost;
int use;
char *p,
*dcm;
if (row == curY && col == curX)
return;
if (curY >= 0 && curX >= 0)
{
relcost = calccost (curY, curX, row, col, 0);
use = USEREL;
if ((homecost = Wcm.cc_home) < BIG)
homecost += calccost (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);
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;
else
crcost += calccost (curY + 1, 0, row, col, 0);
else
crcost += calccost (curY, 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;
}
else
{
directcost = 0, relcost = 100000;
dcm = Wcm.cm_abs;
}
if (directcost <= relcost)
{
cost = 0;
p = dcm == Wcm.cm_habs ? tgoto (dcm, row, col) :
tgoto (dcm, col, row);
tputs (p, 1, evalcost);
if (cost <= relcost)
{
tputs (p, 1, cmputc);
curY = row, curX = col;
return;
}
}
switch (use)
{
case USEHOME:
tputs (Wcm.cm_home, 1, cmputc);
curY = 0, curX = 0;
break;
case USELL:
tputs (Wcm.cm_ll, 1, cmputc);
curY = Wcm.cm_rows - 1, curX = 0;
break;
case USECR:
tputs (Wcm.cm_cr, 1, cmputc);
if (Wcm.cm_autolf)
curY++;
curX = 0;
break;
}
(void) calccost (curY, curX, row, col, 1);
curY = row, curX = col;
}
void
Wcm_clear ()
{
bzero (&Wcm, sizeof Wcm);
UP = 0;
BC = 0;
}
int
Wcm_init ()
{
#if 0
if (Wcm.cm_abs && !Wcm.cm_ds)
return 0;
#endif
if (Wcm.cm_abs)
return 0;
if (!Wcm.cm_up || !Wcm.cm_left)
return - 1;
if (!Wcm.cm_abs && (!Wcm.cm_down || !Wcm.cm_right))
return - 1;
if (Wcm.cm_rows <= 0 || Wcm.cm_cols <= 0)
return - 2;
return 0;
}