/* redraw.c */
/* Author:
* Steve Kirkendall
* 14407 SW Teal Blvd. #C
* Beaverton, OR 97005
* kirkenda@cs.pdx.edu
*/
/* This file contains functions that draw text on the screen. The major entry
* points are:
* redrawrange() - called from modify.c to give hints about what parts
* of the screen need to be redrawn.
* redraw() - redraws the screen (or part of it) and positions
* the cursor where it belongs.
* idx2col() - converts a markidx() value to a logical column number.
*/
#include "config.h"
#include "vi.h"
#ifdef CRUNCH
# define NEAR LINES
#else
# define NEAR (*o_nearscroll&0xff)
#endif
/* This variable contains the line number that smartdrawtext() knows best */
static long smartlno;
/* This function remembers where changes were made, so that the screen can be
* redraw in a more efficient manner.
*/
static long redrawafter; /* line# of first line that must be redrawn */
static long preredraw; /* line# of last line changed, before change */
static long postredraw; /* line# of last line changed, after change */
static int mustredraw; /* boolean: anything forcing a screen update? */
void redrawrange(after, pre, post)
long after; /* lower bound of redrawafter */
long pre; /* upper bound of preredraw */
long post; /* upper bound of postredraw */
{
if (after == redrawafter)
{
/* multiple insertions/deletions at the same place -- combine
* them
*/
preredraw -= (post - pre);
if (postredraw < post)
{
preredraw += (post - postredraw);
postredraw = post;
}
if (redrawafter > preredraw)
{
redrawafter = preredraw;
}
if (redrawafter < 1L)
{
redrawafter = 0L;
preredraw = postredraw = INFINITY;
}
}
else if (postredraw > 0L)
{
/* multiple changes in different places -- redraw everything
* after "after".
*/
postredraw = preredraw = INFINITY;
if (after < redrawafter)
redrawafter = after;
}
else
{
/* first change */
redrawafter = after;
preredraw = pre;
postredraw = post;
}
mustredraw = TRUE;
}
#ifndef NO_CHARATTR
/* see if a given line uses character attribute strings */
static int hasattr(lno, text)
long lno; /* the line# of the cursor */
REG char *text; /* the text of the line, from fetchline */
{
static long plno; /* previous line number */
static long chgs; /* previous value of changes counter */
static int panswer;/* previous answer */
char *scan;
/* if charattr is off, then the answer is "no, it doesn't" */
if (!*o_charattr)
{
chgs = 0; /* <- forces us to check if charattr is later set */
return FALSE;
}
/* if we already know the answer, return it... */
if (lno == plno && chgs == changes)
{
return panswer;
}
/* get the line & look for "\fX" */
if (!text[0] || !text[1] || !text[2])
{
panswer = FALSE;
}
else
{
for (scan = text; scan[2] && !(scan[0] == '\\' && scan[1] == 'f'); scan++)
{
}
panswer = (scan[2] != '\0');
}
/* save the results */
plno = lno;
chgs = changes;
/* return the results */
return panswer;
}
#endif
#ifndef NO_VISIBLE
/* This function checks to make sure that the correct lines are shown in
* reverse-video. This is used to handle the "v" and "V" commands.
*/
static long vizlow, vizhigh; /* the starting and ending lines */
static int vizleft, vizright; /* starting & ending indicies */
static int vizchange; /* boolean: must use stupid drawtext? */
static void setviz(curs)
MARK curs;
{
long newlow, newhigh;
long extra = 0L;
/* for now, assume the worst... */
vizchange = TRUE;
/* set newlow & newhigh according to V_from and cursor */
if (!V_from)
{
/* no lines should have reverse-video */
if (vizlow)
{
redrawrange(vizlow, vizhigh + 1L, vizhigh + 1L);
vizlow = vizhigh = 0L;
}
else
{
vizchange = FALSE;
}
return;
}
/* figure out which lines *SHOULD* have hilites */
if (V_from < curs)
{
newlow = markline(V_from);
newhigh = markline(curs);
vizleft = markidx(V_from);
vizright = markidx(curs) + 1;
}
else
{
newlow = markline(curs);
newhigh = markline(V_from);
vizleft = markidx(curs);
vizright = markidx(V_from) + 1;
}
/* adjust for line-mode hiliting */
if (V_linemd)
{
vizleft = 0;
vizright = BLKSIZE - 1;
}
else
{
extra = 1L;
}
/* arrange for the necessary lines to be redrawn */
if (vizlow == 0L)
{
/* just starting to redraw */
redrawrange(newlow, newhigh, newhigh);
}
else
{
/* Were new lines added/removed at the front? */
if (newlow != vizlow)
{
if (newlow < vizlow)
redrawrange(newlow, vizlow + extra, vizlow + extra);
else
redrawrange(vizlow, newlow + extra, newlow + extra);
}
/* Were new lines added/removed at the back? */
if (newhigh != vizhigh)
{
if (newhigh < vizhigh)
redrawrange(newhigh + 1L - extra, vizhigh + 1L, vizhigh + 1L);
else
redrawrange(vizhigh + 1L - extra, newhigh, newhigh);
}
}
/* remember which lines will contain hilighted text now */
vizlow = newlow;
vizhigh = newhigh;
}
#endif /* !NO_VISIBLE */
/* This function converts a MARK to a column number. It doesn't automatically
* adjust for leftcol; that must be done by the calling function
*/
int idx2col(curs, text, inputting)
MARK curs; /* the line# & index# of the cursor */
REG char *text; /* the text of the line, from fetchline */
int inputting; /* boolean: called from input() ? */
{
static MARK pcursor;/* previous cursor, for possible shortcut */
static MARK pcol; /* column number for pcol */
static long chgs; /* previous value of changes counter */
REG int col; /* used to count column numbers */
REG int idx; /* used to count down the index */
REG int i;
/* for now, assume we have to start counting at the left edge */
col = 0;
idx = markidx(curs);
/* if the file hasn't changed & line number is the same & it has no
* embedded character attribute strings, can we do shortcuts?
*/
if (chgs == changes
&& !((curs ^ pcursor) & ~(BLKSIZE - 1))
#ifndef NO_CHARATTR
&& !hasattr(markline(curs), text)
#endif
)
{
/* no movement? */
if (curs == pcursor)
{
/* return the column of the char; for tabs, return its last column */
if (text[idx] == '\t' && !inputting && !*o_list)
{
return pcol + *o_tabstop - (pcol % *o_tabstop) - 1;
}
else
{
return pcol;
}
}
/* movement to right? */
if (curs > pcursor)
{
/* start counting from previous place */
col = pcol;
idx = markidx(curs) - markidx(pcursor);
text += markidx(pcursor);
}
}
/* count over to the char after the idx position */
while (idx > 0 && (i = *text)) /* yes, ASSIGNMENT! */
{
if (i == '\t' && !*o_list)
{
col += *o_tabstop;
col -= col % *o_tabstop;
}
else if (i >= '\0' && i < ' ' || i == '\177')
{
col += 2;
}
#ifndef NO_CHARATTR
else if (i == '\\' && text[1] == 'f' && text[2] && *o_charattr)
{
text += 2; /* plus one more at bottom of loop */
idx -= 2;
}
#endif
else
{
col++;
}
text++;
idx--;
}
/* save stuff to speed next call */
pcursor = curs;
pcol = col;
chgs = changes;
/* return the column of the char; for tabs, return its last column */
if (*text == '\t' && !inputting && !*o_list)
{
return col + *o_tabstop - (col % *o_tabstop) - 1;
}
else
{
return col;
}
}
/* This function is similar to idx2col except that it takes care of sideways
* scrolling - for the given line, at least.
*/
int mark2phys(m, text, inputting)
MARK m; /* a mark to convert */
char *text; /* the line that m refers to */
int inputting; /* boolean: caled from input() ? */
{
int i;
i = idx2col(m, text, inputting);
while (i < leftcol)
{
leftcol -= *o_sidescroll;
mustredraw = TRUE;
redrawrange(1L, INFINITY, INFINITY);
}
while (i > rightcol)
{
leftcol += *o_sidescroll;
mustredraw = TRUE;
redrawrange(1L, INFINITY, INFINITY);
}
physrow = markline(m) - topline;
physcol = i - leftcol;
if (*o_number)
physcol += 8;
return physcol;
}
/* This function draws a single line of text on the screen. The screen's
* cursor is assumed to be located at the leftmost column of the appropriate
* row.
*/
static void drawtext(text, lno, clr)
REG char *text; /* the text to draw */
long lno; /* the number of the line to draw */
int clr; /* boolean: do a clrtoeol? */
{
REG int col; /* column number */
REG int i;
REG int tabstop; /* *o_tabstop */
REG int limitcol; /* leftcol or leftcol + COLS */
int abnormal; /* boolean: charattr != A_NORMAL? */
#ifndef NO_VISIBLE
int rev; /* boolean: standout mode, too? */
int idx = 0;
#endif
char numstr[9];
/* show the line number, if necessary */
if (*o_number)
{
sprintf(numstr, "%6ld ", lno);
qaddstr(numstr);
}
#ifndef NO_SENTENCE
/* if we're hiding format lines, and this is one of them, then hide it */
if (*o_hideformat && *text == '.')
{
clrtoeol();
#if OSK
qaddch('\l');
#else
qaddch('\n');
#endif
return;
}
#endif
/* move some things into registers... */
limitcol = leftcol;
tabstop = *o_tabstop;
abnormal = FALSE;
#ifndef CRUNCH
if (clr)
clrtoeol();
#endif
/* skip stuff that was scrolled off left edge */
for (col = 0;
(i = *text) && col < limitcol; /* yes, ASSIGNMENT! */
text++)
{
#ifndef NO_VISIBLE
idx++;
#endif
if (i == '\t' && !*o_list)
{
col = col + tabstop - (col % tabstop);
}
else if (i >= 0 && i < ' ' || i == '\177')
{
col += 2;
}
#ifndef NO_CHARATTR
else if (i == '\\' && text[1] == 'f' && text[2] && *o_charattr)
{
text += 2; /* plus one more as part of "for" loop */
/* since this attribute might carry over, we need it */
switch (*text)
{
case 'R':
case 'P':
attrset(A_NORMAL);
abnormal = FALSE;
break;
case 'B':
attrset(A_BOLD);
abnormal = TRUE;
break;
case 'U':
attrset(A_UNDERLINE);
abnormal = TRUE;
break;
case 'I':
attrset(A_ALTCHARSET);
abnormal = TRUE;
break;
}
}
#endif
else
{
col++;
}
}
#ifndef NO_VISIBLE
/* Should we start hiliting at the first char of this line? */
if ((lno > vizlow && lno <= vizhigh
|| lno == vizlow && vizleft < idx)
&& !(lno == vizhigh && vizright < idx))
{
do_VISIBLE();
rev = TRUE;
}
#endif
/* adjust for control char that was partially visible */
while (col > limitcol)
{
qaddch(' ');
limitcol++;
}
/* now for the visible characters */
limitcol = leftcol + COLS;
if (*o_number)
limitcol -= 8;
for (; (i = *text) && col < limitcol; text++)
{
#ifndef NO_VISIBLE
/* maybe turn hilite on/off in the middle of the line */
if (lno == vizlow && vizleft == idx)
{
do_VISIBLE();
rev = TRUE;
}
if (lno == vizhigh && vizright == idx)
{
do_SE();
rev = FALSE;
}
idx++;
/* if hiliting, never emit physical tabs */
if (rev && i == '\t' && !*o_list)
{
i = col + tabstop - (col % tabstop);
do
{
qaddch(' ');
col++;
} while (col < i && col < limitcol);
}
else
#endif /* !NO_VISIBLE */
if (i == '\t' && !*o_list)
{
i = col + tabstop - (col % tabstop);
if (i < limitcol)
{
#ifdef CRUNCH
if (!clr && has_PT && !((i - leftcol) & 7))
#else
if (has_PT && !((i - leftcol) & 7))
#endif
{
do
{
qaddch('\t');
col += 8; /* not exact! */
} while (col < i);
col = i; /* NOW it is exact */
}
else
{
do
{
qaddch(' ');
col++;
} while (col < i && col < limitcol);
}
}
else /* tab ending after screen? next line! */
{
#ifdef CRUNCH
/* needed at least when scrolling the screen right -nox */
if (clr && col < limitcol)
clrtoeol();
#endif
col = limitcol;
if (has_AM)
{
addch('\n'); /* GB */
}
}
}
else if (i >= 0 && i < ' ' || i == '\177')
{
col += 2;
qaddch('^');
if (col <= limitcol)
{
qaddch(i ^ '@');
}
}
#ifndef NO_CHARATTR
else if (i == '\\' && text[1] == 'f' && text[2] && *o_charattr)
{
text += 2; /* plus one more as part of "for" loop */
switch (*text)
{
case 'R':
case 'P':
attrset(A_NORMAL);
abnormal = FALSE;
break;
case 'B':
attrset(A_BOLD);
abnormal = TRUE;
break;
case 'U':
attrset(A_UNDERLINE);
abnormal = TRUE;
break;
case 'I':
attrset(A_ALTCHARSET);
abnormal = TRUE;
break;
}
}
#endif
else
{
col++;
qaddch(i);
}
}
/* get ready for the next line */
#ifndef NO_CHARATTR
if (abnormal)
{
attrset(A_NORMAL);
}
#endif
if (*o_list && col < limitcol)
{
qaddch('$');
col++;
}
#ifndef NO_VISIBLE
/* did we hilite this whole line? If so, STOP! */
if (rev)
{
do_SE();
}
#endif
#ifdef CRUNCH
if (clr && col < limitcol)
{
clrtoeol();
}
#endif
if (!has_AM || col < limitcol)
{
addch('\n');
}
wqrefresh();
}
#ifndef CRUNCH
static void nudgecursor(same, scan, new, lno)
int same; /* number of chars to be skipped over */
char *scan; /* where the same chars end */
char *new; /* where the visible part of the line starts */
long lno; /* line number of this line */
{
int col;
if (same > 0)
{
if (same < 5)
{
/* move the cursor by overwriting */
while (same > 0)
{
qaddch(scan[-same]);
same--;
}
}
else
{
/* move the cursor by calling move() */
col = (int)(scan - new);
if (*o_number)
col += 8;
move((int)(lno - topline), col);
}
}
}
#endif /* not CRUNCH */
/* This function draws a single line of text on the screen, possibly with
* some cursor optimization. The cursor is repositioned before drawing
* begins, so its position before doesn't really matter.
*/
static void smartdrawtext(text, lno, showit)
REG char *text; /* the text to draw */
long lno; /* line number of the text */
int showit; /* boolean: output line? (else just remember it) */
{
#ifdef CRUNCH
move((int)(lno - topline), 0);
if (showit)
{
drawtext(text, lno, TRUE);
}
#else /* not CRUNCH */
static char old[256]; /* how the line looked last time */
char new[256]; /* how it looks now */
char *build; /* used to put chars into new[] */
char *scan; /* used for moving thru new[] or old[] */
char *end; /* last non-blank changed char */
char *shift; /* used to insert/delete chars */
int same; /* length of a run of unchanged chars */
int limitcol;
int col;
int i;
char numstr[9];
# ifndef NO_CHARATTR
/* if this line has attributes, do it the dumb way instead */
if (hasattr(lno, text))
{
move((int)(lno - topline), 0);
drawtext(text, lno, TRUE);
return;
}
# endif
# ifndef NO_SENTENCE
/* if this line is a format line, & we're hiding format lines, then
* let the dumb drawtext() function handle it
*/
if (*o_hideformat && *text == '.')
{
move((int)(lno - topline), 0);
drawtext(text, lno, TRUE);
return;
}
# endif
# ifndef NO_VISIBLE
if (vizchange)
{
move((int)(lno - topline), 0);
drawtext(text, lno, TRUE);
smartlno = 0L;
return;
}
# endif
/* skip stuff that was scrolled off left edge */
limitcol = leftcol;
for (col = 0;
(i = *text) && col < limitcol; /* yes, ASSIGNMENT! */
text++)
{
if (i == '\t' && !*o_list)
{
col = col + *o_tabstop - (col % *o_tabstop);
}
else if (i >= 0 && i < ' ' || i == '\177')
{
col += 2;
}
else
{
col++;
}
}
/* adjust for control char that was partially visible */
build = new;
while (col > limitcol)
{
*build++ = ' ';
limitcol++;
}
/* now for the visible characters */
limitcol = leftcol + COLS;
if (*o_number)
limitcol -= 8;
for (; (i = *text) && col < limitcol; text++)
{
if (i == '\t' && !*o_list)
{
i = col + *o_tabstop - (col % *o_tabstop);
while (col < i && col < limitcol)
{
*build++ = ' ';
col++;
}
}
else if (i >= 0 && i < ' ' || i == '\177')
{
col += 2;
*build++ = '^';
if (col <= limitcol)
{
*build++ = (i ^ '@');
}
}
else
{
col++;
*build++ = i;
}
}
if (col < limitcol && *o_list)
{
*build++ = '$';
col++;
}
end = build;
while (col < limitcol)
{
*build++ = ' ';
col++;
}
/* if we're just supposed to remember this line, then remember it */
if (!showit)
{
smartlno = lno;
strncpy(old, new, COLS);
return;
}
/* locate the last non-blank character */
while (end > new && end[-1] == ' ')
{
end--;
}
/* can we optimize the displaying of this line? */
if (lno != smartlno)
{
/* nope, can't optimize - different line */
move((int)(lno - topline), 0);
/* show the line number, if necessary */
if (*o_number)
{
sprintf(numstr, "%6ld ", lno);
qaddstr(numstr);
}
/* show the new line */
for (scan = new, build = old; scan < end; )
{
qaddch(*scan);
*build++ = *scan++;
}
if (end < new + COLS - (*o_number ? 8 : 0))
{
clrtoeol();
while (build < old + COLS)
{
*build++ = ' ';
}
}
smartlno = lno;
return;
}
/* skip any initial unchanged characters */
for (scan = new, build = old; scan < end && *scan == *build; scan++, build++)
{
}
i = (scan - new);
if (*o_number)
i += 8;
move((int)(lno - topline), i);
/* The in-between characters must be changed */
same = 0;
while (scan < end)
{
/* is this character a match? */
if (scan[0] == build[0])
{
same++;
}
else /* do we want to insert? */
if (scan < end - 1 && scan[1] == build[0] && (has_IC || has_IM))
{
nudgecursor(same, scan, new, lno);
same = 0;
insch(*scan);
for (shift = old + COLS; --shift > build; )
{
shift[0] = shift[-1];
}
*build = *scan;
}
else /* do we want to delete? */
if (build < old + COLS - 1 && scan[0] == build[1] && has_DC)
{
nudgecursor(same, scan, new, lno);
same = 0;
delch();
same++;
for (shift = build; shift < old + COLS - 1; shift++)
{
shift[0] = shift[1];
}
if (*o_number)
shift -= 8;
*shift = ' ';
}
else /* we must overwrite */
{
nudgecursor(same, scan, new, lno);
same = 0;
addch(*scan);
*build = *scan;
}
build++;
scan++;
}
/* maybe clear to EOL */
end = old + COLS - (*o_number ? 8 : 0);
while (build < end && *build == ' ')
{
build++;
}
if (build < end)
{
nudgecursor(same, scan, new, lno);
same = 0;
clrtoeol();
while (build < old + COLS)
{
*build++ = ' ';
}
}
#endif /* not CRUNCH */
}
/* This function is used in visual mode for drawing the screen (or just parts
* of the screen, if that's all thats needed). It also takes care of
* scrolling.
*/
void redraw(curs, inputting)
MARK curs; /* where to leave the screen's cursor */
int inputting; /* boolean: being called from input() ? */
{
char *text; /* a line of text to display */
static long chgs; /* previous changes level */
long l;
int i;
#ifndef CRUNCH
static long showtop; /* top line in window */
static long showbottom; /* bottom line in window */
#endif
/* if curs == MARK_UNSET, then we should reset internal vars */
if (curs == MARK_UNSET)
{
if (topline < 1 || topline > nlines)
{
topline = 1L;
}
else
{
move(LINES - 1, 0);
clrtoeol();
}
leftcol = 0;
mustredraw = TRUE;
redrawafter = INFINITY;
preredraw = 0L;
postredraw = 0L;
chgs = 0;
smartlno = 0L;
#ifndef NO_VISIBLE
vizlow = vizhigh = 0L;
vizchange = FALSE;
#endif
#ifndef CRUNCH
showtop = 0;
showbottom = INFINITY;
#endif
return;
}
#ifndef NO_VISIBLE
/* adjustments to hilited area may force extra lines to be redrawn. */
setviz(curs);
#endif
/* figure out which column the cursor will be in */
l = markline(curs);
text = fetchline(l);
mark2phys(curs, text, inputting);
#ifndef NO_COLOR
fixcolor();
#endif
/* adjust topline, if necessary, to get the cursor on the screen */
if (l >= topline && l <= botline)
{
/* it is on the screen already */
/* if the file was changed but !mustredraw, then redraw line */
if (!mustredraw && (chgs != changes
#ifndef NO_VISIBLE
|| V_from
#endif
#ifndef CRUNCH
|| l < showtop || l > showbottom
#endif
))
{
smartdrawtext(text, l, (chgs != changes));
}
}
else if (l < topline && l >= topline - NEAR && (has_SR || has_AL))
{
/* near top - scroll down */
if (!mustredraw)
{
move(0,0);
while (l < topline)
{
topline--;
if (has_SR)
{
do_SR();
}
else
{
insertln();
}
text = fetchline(topline);
drawtext(text, topline, FALSE);
do_UP();
}
/* blank out the last line */
move(LINES - 1, 0);
clrtoeol();
}
else
{
topline = l;
redrawrange(0L, INFINITY, INFINITY);
}
}
else if (l > topline && l <= botline + NEAR)
{
/* near bottom -- scroll up */
if (!mustredraw)
{
move(LINES - 1,0);
clrtoeol();
while (l > botline)
{
topline++; /* <-- also adjusts botline */
text = fetchline(botline);
drawtext(text, botline, FALSE);
}
#ifndef CRUNCH
showbottom = l;
#endif
}
else
{
topline = l - (LINES - 2);
redrawrange(0L, INFINITY, INFINITY);
}
}
else
{
/* distant line - center it & force a redraw */
topline = l - (LINES - 1) / 2;
if (topline < 1)
{
topline = 1;
}
redrawrange(0L, INFINITY, INFINITY);
smartlno = 0L;
changes++;
}
#ifndef CRUNCH
/* make sure the current line is included in the "window" */
if (l < showtop)
{
redrawrange(l, showtop, showtop);
showtop = l;
}
if (l > showbottom)
{
redrawrange(showbottom, l, l);
showbottom = l;
}
#endif
/* Now... do we really have to redraw? */
if (mustredraw)
{
/* If redrawfter (and friends) aren't set, assume we should
* redraw everything.
*/
if (redrawafter == INFINITY)
{
redrawafter = 0L;
preredraw = postredraw = INFINITY;
}
#ifndef CRUNCH
/* shrink the window, if possible */
if (showtop < topline)
{
showtop = topline;
}
if (showbottom > botline)
{
showbottom = botline;
}
if (postredraw == INFINITY)
{
/* these will be set to more reasonable values later */
showtop = INFINITY;
showbottom = 0L;
}
#endif
/* adjust smartlno to correspond with inserted/deleted lines */
if (smartlno >= redrawafter)
{
if (smartlno < preredraw && postredraw != preredraw) /*!!!*/
{
smartlno = 0L;
}
else
{
smartlno += (postredraw - preredraw);
}
}
/* should we insert some lines into the screen? */
if (preredraw < postredraw && preredraw <= botline)
{
/* lines were inserted into the file */
/* decide where insertion should start */
if (preredraw < topline)
{
l = topline;
}
else
{
l = preredraw;
}
/* insert the lines... maybe */
if (l + postredraw - preredraw > botline || !has_AL || *o_number)
{
/* Whoa! a whole screen full - just redraw */
preredraw = postredraw = INFINITY;
}
else
{
/* really insert 'em */
move((int)(l - topline), 0);
for (i = postredraw - preredraw; i > 0; i--)
{
insertln();
}
/* NOTE: the contents of those lines will be
* drawn as part of the regular redraw loop.
*/
/* clear the last line */
move(LINES - 1, 0);
clrtoeol();
}
}
/* do we want to delete some lines from the screen? */
if (preredraw > postredraw && postredraw <= botline)
{
if (preredraw > botline || !has_DL || *o_number)
{
postredraw = preredraw = INFINITY;
}
else /* we'd best delete some lines from the screen */
{
/* clear the last line, so it doesn't look
* ugly as it gets pulled up into the screen
*/
move(LINES - 1, 0);
clrtoeol();
/* delete the lines */
move((int)(postredraw - topline), 0);
for (l = postredraw;
l < preredraw && l <= botline;
l++)
{
deleteln();
}
/* draw the lines that are now newly visible
* at the bottom of the screen
*/
i = LINES - 1 + (postredraw - preredraw);
move(i, 0);
for (l = topline + i; l <= botline; l++)
{
/* clear this line */
clrtoeol();
/* draw the line, or ~ for non-lines */
if (l <= nlines)
{
text = fetchline(l);
drawtext(text, l, FALSE);
}
else
{
addstr("~\n");
}
}
}
}
/* redraw the current line */
l = markline(curs);
pfetch(l);
smartdrawtext(ptext, l, TRUE);
#ifndef CRUNCH
/* decide which lines must be in the "window" around the cursor */
l = markline(curs);
if ((*o_window & 0xff) + 1 == LINES)
{
showtop = 1;
showbottom = INFINITY;
}
else if (l < showtop || l > showbottom)
{
l -= (*o_window & 0xff) / 2;
if (l < topline)
{
l = topline;
}
if (l < showtop)
{
showtop = l;
}
l += (*o_window & 0xff) - 1;
if (l > botline)
{
showtop = showtop - l + botline;
l = botline;
}
if (l > showbottom)
{
showbottom = l;
}
}
#endif
/* decide where we should start redrawing from */
if (redrawafter < topline)
{
l = topline;
}
else
{
l = redrawafter;
}
if (l <= botline && l < postredraw && (l != smartlno || botline != smartlno))
{
/* draw the other lines */
move((int)(l - topline), 0);
for (; l <= botline && l < postredraw; l++)
{
/* we already drew the current line, so skip it now */
if (l == smartlno)
{
#if OSK
qaddch('\l');
#else
qaddch('\n');
#endif
continue;
}
/* draw the line, or ~ for non-lines */
if (l > nlines)
{
qaddch('~');
clrtoeol();
addch('\n');
}
#ifndef CRUNCH
else if (l < showtop || l > showbottom)
{
qaddch('@');
clrtoeol();
addch('\n');
}
#endif
else
{
text = fetchline(l);
drawtext(text, l, TRUE);
}
}
}
mustredraw = FALSE;
}
/* force total (non-partial) redraw next time if not set */
redrawafter = INFINITY;
preredraw = 0L;
postredraw = 0L;
/* move the cursor to where it belongs */
move((int)(markline(curs) - topline), physcol);
wqrefresh();
chgs = changes;
}