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include "../curses.h"
# PS_SLIDE -- Slide a rectangle on the screen
#
# B.Simon 19-Jan-89 Original
# B.Simon 26-Sep-90 Updated to use screen buffer
# B.Simon 22-Mar-91 Fix error in left & right slides
bool procedure ps_slide (source, dir, dist)
int source[RSIZE] # i: Rectangle
int dir # i: Direction (from curses.h)
int dist # i: Distance (> 0)
#--
include "screen.com"
char blank
int dest[RSIZE]
int nrows, ncols, irow, icol
pointer oldscr, newscr, linscr
data blank / ' ' /
bool ps_intersect(), ttygetb()
pointer ps_screen()
begin
if (! ps_intersect (source, lines, cols, dest))
return (true)
ncols = RWIDTH(dest)
nrows = RHEIGHT(dest)
switch (dir) {
case DIR_UP:
if (RLEFT(dest) != 1 || RRIGHT(dest) != cols)
return (false)
if ( !(ttygetb (term, "al") && ttygetb (term, "dl")))
return (false)
call ps_setcur (max (1, RTOP(dest)-dist), 1)
do irow = 1, dist
call ps_sendcap ("dl", lines - RTOP(dest) + dist)
if (RBOT(dest) < lines) {
call ps_setcur (RBOT(dest) + 1, 1)
do irow = 1, dist
call ps_sendcap ("al", lines - RBOT(dest))
}
oldscr = ps_screen (RTOP(dest), 1)
newscr = ps_screen (RTOP(dest)-dist, 1)
do irow = 1, nrows-dist {
if (newscr >= termscr)
call amovc (Memc[oldscr], Memc[newscr], ncols)
oldscr = oldscr + cols
newscr = newscr + cols
}
do irow = 1, dist {
if (newscr < (termscr + lines * cols))
call amovkc (blank, Memc[newscr], ncols)
newscr = newscr + cols
}
case DIR_DOWN:
if (RLEFT(dest) != 1 || RRIGHT(dest) != cols)
return (false)
if ( !(ttygetb (term, "al") && ttygetb (term, "dl")))
return (false)
call ps_setcur (min (lines, RBOT(dest)+1), 1)
do irow = 1, dist
call ps_sendcap ("dl", lines - RBOT(dest))
call ps_setcur (RTOP(dest), 1)
do irow = 1, dist
call ps_sendcap ("al", lines - RTOP(dest))
oldscr = ps_screen (RBOT(dest), 1)
newscr = ps_screen (RBOT(dest)+dist, 1)
do irow = 1, nrows-dist {
if (newscr < (termscr + lines * cols))
call amovc (Memc[oldscr], Memc[newscr], ncols)
oldscr = oldscr - cols
newscr = newscr - cols
}
do irow = 1, dist {
if (newscr >= termscr)
call amovkc (blank, Memc[newscr], ncols)
newscr = newscr - cols
}
case DIR_LEFT:
if (! ((ttygetb (term, "ic") || ttygetb (term, "im")) &&
ttygetb (term, "dc")))
return (false)
do irow = RTOP(dest), RBOT(dest) {
call ps_setcur (irow, max (1, RLEFT(dest)-dist))
call ps_sendcap ("dm", 1)
do icol = 1, dist
call ps_sendcap ("dc", 1)
call ps_sendcap ("ed", 1)
if (RRIGHT(dest) < cols) {
call ps_setcur (irow, RRIGHT(dest) - dist + 1)
call ps_sendcap ("im", 1)
do icol = 1, dist {
call ps_sendcap ("ic", 1)
call ps_sendcap ("ip", 1)
call putc (ttyout, blank)
}
call ps_sendcap ("ei", 1)
call ps_updcur (irow, RRIGHT(dest) + 1)
}
linscr = ps_screen (irow,1)
oldscr = ps_screen (irow,RLEFT(dest))
newscr = oldscr - dist
do icol = 1, ncols-dist+1 {
if (newscr >= linscr)
Memc[newscr] = Memc[oldscr]
oldscr = oldscr + 1
newscr = newscr + 1
}
do icol = 1, dist {
if (newscr < linscr + cols)
Memc[newscr] = blank
newscr = newscr + 1
}
}
case DIR_RIGHT:
if (! ((ttygetb (term, "ic") || ttygetb (term, "im")) &&
ttygetb (term, "dc")))
return (false)
do irow = RTOP(dest), RBOT(dest) {
if (RRIGHT(dest) < cols - 1) {
call ps_setcur (irow, RRIGHT(dest) + 1)
call ps_sendcap ("dm", 1)
do icol = 1, dist
call ps_sendcap ("dc", 1)
call ps_sendcap ("ed", 1)
}
call ps_setcur (irow, RLEFT(dest))
call ps_sendcap ("im", 1)
do icol = 1, dist {
call ps_sendcap ("ic", 1)
call ps_sendcap ("ip", 1)
call putc (ttyout, blank)
}
call ps_sendcap ("ei", 1)
call ps_updcur (irow, RLEFT(dest) + dist)
linscr = ps_screen (irow,1)
oldscr = ps_screen (irow,RRIGHT(dest))
newscr = oldscr + dist
do icol = 1, ncols-dist+1 {
if (newscr < linscr + cols)
Memc[newscr] = Memc[oldscr]
oldscr = oldscr - 1
newscr = newscr - 1
}
do icol = 1, dist {
if (newscr >= linscr)
Memc[newscr] = blank
newscr = newscr - 1
}
}
default:
return (false)
}
return (true)
end
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