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display.c
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display.c
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/*_ display.c Fri Apr 14 1989 */
/*
* The functions in this file handle redisplay. There are two halves, the
* ones that update the virtual display screen, and the ones that make the
* physical display screen the same as the virtual display screen. These
* functions use hints that are left in the windows by the commands.
*
* REVISION HISTORY:
*
* ? Steve Wilhite, 1-Dec-85
* - massive cleanup on code.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "ed.h"
#ifndef max
#define max(a,b) ((a) > (b) ? (a) : (b))
#endif
#define SHOWCONTROL 1
char column_mode = FALSE;
extern char *EMACSREV;
#define WFDEBUG 0 /* Window flag debug. */
#if !(IBMPC || _WIN32)
static char *blnk_ln;
#endif
typedef struct VIDEO {
short v_flag; /* Flags */
#if IBMPC || _WIN32
unsigned short v_text[1]; /* Screen data. */
#else
char v_text[1]; /* Screen data. */
#endif
} VIDEO;
#define VFCHG 0x0001 /* Changed. */
int display_recalc()
{
register WINDOW *wp;
for (wp = wheadp; wp; wp = wp->w_wndp) /* for each window */
wp->w_flag |= WFHARD | WFMODE;
return TRUE;
}
#if !IBMPC && !_WIN32
void updateline(int row, char vline[], char pline[]);
#endif
#if IBMPC || _WIN32
/* Attribute flags */
#define MODEATTR config.modeattr /* for mode line */
#define NORMATTR config.normattr /* for normal text */
#define EOLATTR config.eolattr /* for end of line */
#define MARKATTR config.markattr /* for selected text */
#define URLATTR config.urlattr // for URL text
display_eol_bg()
{
EOLATTR += 0x1000;
return display_recalc();
}
display_norm_bg()
{
NORMATTR += 0x1000;
return display_recalc();
}
display_norm_fg()
{
NORMATTR = (NORMATTR & 0xF0FF) + ((NORMATTR + 0x100) & 0xF00);
return display_recalc();
}
display_mode_bg()
{
MODEATTR += 0x1000;
return display_recalc();
}
display_mode_fg()
{
MODEATTR = (MODEATTR & 0xF0FF) + ((MODEATTR + 0x100) & 0xF00);
return display_recalc();
}
display_mark_bg()
{
MARKATTR += 0x1000;
return display_recalc();
}
display_mark_fg()
{
MARKATTR = (MARKATTR & 0xF0FF) + ((MARKATTR + 0x100) & 0xF00);
return display_recalc();
}
#else
#define STANDATTR 0x80 /* Standout mode bit flag, or'ed in */
#define NORMATTR 0x00 /* Attribute for normal characters */
#define MODEATTR STANDATTR
#define EOLATTR NORMATTR
#define MARKATTR STANDATTR
#define URLATTR STANDATTR
#endif
int sgarbf = TRUE; /* TRUE if screen is garbage */
int mpresf = FALSE; /* TRUE if message in last line */
int vtrow = 0; /* Row location of SW cursor */
int vtcol = 0; /* Column location of SW cursor */
int ttrow = HUGE; /* Row location of HW cursor */
int ttcol = HUGE; /* Column location of HW cursor */
int attr; /* Attribute for chars to vtputc() */
int hardtabsize = 8; // hardware tab size
VIDEO **vscreen; /* Virtual screen. */
VIDEO **pscreen; /* Physical screen. */
/*
* Initialize the data structures used by the display code. The edge vectors
* used to access the screens are set up. The operating system's terminal I/O
* channel is set up. All the other things get initialized at compile time.
* The original window has "WFCHG" set, so that it will get completely
* redrawn on the first call to "update".
*/
vtinit()
{
register int i;
register VIDEO *vp;
(*term.t_open)();
vscreen = (VIDEO **) malloc(term.t_nrow*sizeof(VIDEO *));
if (vscreen == NULL)
exit(1);
pscreen = (VIDEO **) malloc(term.t_nrow*sizeof(VIDEO *));
if (pscreen == NULL)
exit(1);
#if !(IBMPC || _WIN32)
blnk_ln = malloc(term.t_ncol+1);
if( blnk_ln == NULL )
exit(1);
memset(blnk_ln,' ',term.t_ncol);
blnk_ln[term.t_ncol] = '\0';
#endif
for (i = 0; i < term.t_nrow; ++i)
{
vp = (VIDEO *)
malloc(sizeof(VIDEO) + (term.t_ncol+1) * sizeof(vp->v_text[0]));
if (vp == NULL)
exit(1);
vscreen[i] = vp;
vp->v_text[term.t_ncol] = '\0';
vp = (VIDEO *)
malloc(sizeof(VIDEO) + (term.t_ncol+1) * sizeof(vp->v_text[0]));
if (vp == NULL)
exit(1);
pscreen[i] = vp;
vp->v_text[term.t_ncol] = '\0';
}
}
/*
* Clean up the virtual terminal system, in anticipation for a return to the
* operating system. Move down to the last line and clear it out (the next
* system prompt will be written in the line). Shut down the channel to the
* terminal.
*/
vttidy()
{ unsigned i;
for (i = 0; i < term.t_nrow; ++i)
{
free(vscreen[i]);
free(pscreen[i]);
}
free(vscreen);
free(pscreen);
#if IBMPC
movecursor(term.t_nrow - 1, 0);
(*term.t_close)();
printf("\n"); /* scroll up one line */
#else
movecursor(term.t_nrow - 1, 0);
(*term.t_putchar)('\n'); /* scroll up one line */
(*term.t_close)();
#endif
}
/*
* Set the virtual cursor to the specified row and column on the virtual
* screen. There is no checking for nonsense values; this might be a good
* idea during the early stages.
*/
vtmove(row, col)
{
vtrow = row;
vtcol = col;
}
/*
* Write a character to the virtual screen. The virtual row and column are
* updated. If the line is too long put a "+" in the last column. This routine
* only puts printing characters into the virtual terminal buffers. Only
* column overflow is checked.
* Startcol is the starting column on the screen.
*/
vtputc(int c, int startcol, int tabbase)
{
register VIDEO *vp;
vp = vscreen[vtrow];
if (vtcol - startcol >= term.t_ncol)
vp->v_text[term.t_ncol - 1] = '+' | MODEATTR;
else if (c == '\t')
{ int i;
i = hardtabsize - ((vtcol - tabbase) % hardtabsize);
do
vtputc(config.tabchar,startcol,tabbase);
while (--i);
}
#if SHOWCONTROL
else if ((unsigned char)c < 0x20 || c == 0x7F)
{
vtputc('^',startcol,tabbase);
vtputc(c ^ 0x40,startcol,tabbase);
}
#endif
else
{
if (vtcol - startcol == 0 && startcol != 0)
vp->v_text[0] = '+' | MODEATTR;
else if (vtcol - startcol >= 0)
vp->v_text[vtcol - startcol] = c | attr;
vtcol++;
}
}
/****************************
* Compute column number of line given index into that line.
*/
int getcol(LINE *dotp, int doto)
{
return getcol2(dotp->l_text, doto);
}
int getcol2(char *dotp, int doto)
{ register int curcol,i;
char c;
curcol = 0;
i = 0;
while (i < doto)
{
c = dotp[i] & 0xFF;
i++;
if (c == '\t')
{
if (hardtabsize == 8)
curcol |= 7;
else
{
curcol = ((curcol + hardtabsize) / hardtabsize) * hardtabsize - 1;
}
}
#if SHOWCONTROL
else if ((unsigned char)c < 0x20 || c == 0x7F)
++curcol;
#endif
++curcol;
}
return curcol;
}
/******************************************
* Inverse of getcol(), i.e. find offset into line that is closest
* to or past column col.
*/
int coltodoto(lp,col)
struct LINE *lp;
int col;
{ int i;
for (i = 0; i < llength(lp); i++)
if (getcol(lp,i) >= col)
break;
return i;
}
/***********************
* Write a string to vtputc().
* Params:
* p = string
* startcol = text column of left side of screen
* tabbase = 0 tab column
*/
static vtputs(char *p, int startcol, int tabbase)
{
while (*p)
vtputc(*p++,startcol,tabbase);
}
/*
* Erase from the end of the software cursor to the end of the line on which
* the software cursor is located.
*/
vteeol(startcol)
int startcol;
{
#if IBMPC || _WIN32
int i;
for (i = max(vtcol - startcol,0); i < term.t_ncol; i++)
vscreen[vtrow]->v_text[i] = EOLATTR | ' ';
#else
memset(&(vscreen[vtrow]->v_text[max(vtcol - startcol,0)]),' ',term.t_ncol -
max(vtcol - startcol,0));
#endif
vtcol = startcol + term.t_ncol;
}
/*
* Make sure that the display is right. This is a three part process. First,
* scan through all of the windows looking for dirty ones. Check the framing,
* and refresh the screen. Second, make sure that "currow" and "curcol" are
* correct for the current window. Third, make the virtual and physical
* screens the same.
*/
void update()
{
register LINE *lp;
register WINDOW *wp;
register VIDEO *vp1;
register VIDEO *vp2;
register int i;
register int j;
register int c;
register int k;
int l_first,l_last;
int scroll_done_flag;
int wcol;
int curcol; /* cursor column from left of text */
char inmark; /* if column marking, and in region */
#if MOUSE
char hidden;
#endif
if (ttkeysininput()) /* if more user input */
return; /* skip updating till caught up */
curcol = getcol(curwp->w_dotp,curwp->w_doto);
if ((lastflag&CFCPCN) == 0) /* Reset goal if last */
curgoal = curcol; /* not backline() or forwline() */
/* If cursor is off left or right side, set update bit so it'll scroll */
if (curwp->w_startcol && curcol <= curwp->w_startcol ||
curcol > curwp->w_startcol + term.t_ncol - 2)
curwp->w_flag |= WFHARD;
for (wp = wheadp; wp; wp = wp->w_wndp) /* for each window */
{
/* Look at any window with update flags set on. */
if (wp->w_flag != 0)
{ char marking = wp->w_markp != NULL;
int col_left,col_right; /* for column marking */
/* If not force reframe, check the framing. */
if ((wp->w_flag & WFFORCE) == 0)
{
lp = wp->w_linep; /* top line on screen */
for (i = 0; i < wp->w_ntrows; ++i)
{
if (lp == wp->w_dotp) /* if dot is on screen */
goto out; /* no reframe necessary */
if (lp == wp->w_bufp->b_linep)
break; /* reached end of buffer */
lp = lforw(lp);
}
/* if not on screen */
if (i == wp->w_ntrows)
{ if (lp == wp->w_dotp ||
wp->w_dotp == wp->w_bufp->b_linep)
wp->w_force = -1; /* one up from bottom */
else if (wp->w_dotp == lback(wp->w_linep))
wp->w_force = 1; /* one before top */
}
} /* if not force reframe */
/* A reframe is necessary.
* Compute a new value for the line at the
* top of the window. Then set the "WFHARD" flag to force full
* redraw.
*/
i = wp->w_force;
if (i > 0) /* if set dot to be on ith window line */
{
--i;
if (i >= wp->w_ntrows)
i = wp->w_ntrows-1; /* clip i to size of window */
}
else if (i < 0) /* if set dot to be -ith line from bottom */
{
i += wp->w_ntrows;
if (i < 0)
i = 0; /* clip to top of screen */
}
else /* set to center of screen */
i = wp->w_ntrows/2;
lp = wp->w_dotp;
while (i != 0 && lback(lp) != wp->w_bufp->b_linep)
{
--i;
lp = lback(lp);
}
wp->w_linep = lp;
wp->w_flag |= WFHARD; /* Force full. */
out:
/* Determine cursor column. If cursor is off the left or the */
/* right, readjust starting column and do a WFHARD update */
wcol = getcol(wp->w_dotp,wp->w_doto);
if (wp->w_startcol && wcol <= wp->w_startcol)
{ wp->w_startcol = wcol ? wcol - 1 : 0;
wp->w_flag |= WFHARD;
}
else if (wp->w_startcol < wcol - term.t_ncol + 2)
{ wp->w_startcol = wcol - term.t_ncol + 2;
wp->w_flag |= WFHARD;
}
/* Determine if we should start out with a standout */
/* attribute or not, depends on if mark is before the window. */
attr = NORMATTR;
if (marking)
{
inmark = FALSE;
for (lp = lforw(wp->w_bufp->b_linep);
lp != wp->w_linep;
lp = lforw(lp))
if (lp == wp->w_markp)
{ inmark = TRUE;
break;
}
if (column_mode)
{
/* Calculate left and right column numbers of region */
col_right = markcol;/*getcol(wp->w_markp,wp->w_marko);*/
if (curgoal <= col_right)
col_left = curgoal;
else
{ col_left = col_right;
col_right = curgoal;
}
}
else
{ if (inmark)
{ attr = MARKATTR;
inmark = FALSE;
}
}
}
/* The window is framed properly now.
* Try to use reduced update. Mode line update has its own special
* flag. The fast update is used if the only thing to do is within
* the line editing.
*/
lp = wp->w_linep; /* line of top of window */
i = wp->w_toprow; /* display row # of top of window */
if ((wp->w_flag & (WFFORCE | WFEDIT | WFHARD | WFMOVE)) == WFEDIT)
{ /* Only need to update the line that the cursor is on */
/* Determine row number and line pointer for cursor line */
while (lp != wp->w_dotp)
{ ++i;
lp = lforw(lp);
}
vscreen[i]->v_flag |= VFCHG; /* assume this line will change */
vtmove(i, 0); /* start at beg of line */
for (j = 0; 1; ++j)
{
#if 0
if (marking)
{ if (wp->w_markp == lp && wp->w_marko == j)
attr ^= NORMATTR ^ MARKATTR;
if (wp->w_dotp == lp && wp->w_doto == j)
attr ^= NORMATTR ^ MARKATTR;
}
#endif
if (j >= llength(lp))
break;
if (attr == NORMATTR && inURL(lp->l_text,llength(lp),j))
{
attr = URLATTR;
vtputc(lgetc(lp, j),wp->w_startcol,0);
attr = NORMATTR;
}
else
vtputc(lgetc(lp, j),wp->w_startcol,0);
}
vteeol(wp->w_startcol); /* clear remainder of line */
}
else if ((wp->w_flag & (WFEDIT | WFHARD)) != 0 ||
marking && wp->w_flag & WFMOVE)
{ /* update every line in the window */
while (i < wp->w_toprow+wp->w_ntrows)
{
vscreen[i]->v_flag |= VFCHG;
vtmove(i, 0);
if (lp != wp->w_bufp->b_linep) /* if not end of buffer */
{
if (marking && column_mode)
{ if (wp->w_markp == lp)
inmark++;
if (wp->w_dotp == lp)
inmark++;
attr = NORMATTR;
}
for (j = 0; 1; ++j)
{ if (marking)
{ if (column_mode)
{
if (inmark && col_left <= vtcol)
attr = MARKATTR;
if (col_right <= vtcol)
attr = NORMATTR;
}
else
{
if (wp->w_markp == lp && wp->w_marko == j)
attr ^= NORMATTR ^ MARKATTR;
if (wp->w_dotp == lp && wp->w_doto == j)
attr ^= NORMATTR ^ MARKATTR;
}
}
if (j >= llength(lp))
break;
if (attr == NORMATTR && inURL(lp->l_text,llength(lp),j))
{
attr = URLATTR;
vtputc(lgetc(lp, j),wp->w_startcol,0);
attr = NORMATTR;
}
else
vtputc(lgetc(lp, j),wp->w_startcol,0);
}
if (inmark == 2)
inmark = 0;
lp = lforw(lp);
}
vteeol(wp->w_startcol);
++i;
}
}
#if !WFDEBUG
if ((wp->w_flag&WFMODE) != 0) /* if mode line is modified */
modeline(wp);
wp->w_flag = 0;
wp->w_force = 0;
#endif
} /* if any update flags on */
#if WFDEBUG
modeline(wp);
wp->w_flag = 0;
wp->w_force = 0;
#endif
} /* for each window */
/* Always recompute the row and column number of the hardware cursor. This
* is the only update for simple moves.
*/
lp = curwp->w_linep;
currow = curwp->w_toprow;
while (lp != curwp->w_dotp)
{
++currow;
lp = lforw(lp);
}
/* Special hacking if the screen is garbage. Clear the hardware screen,
* and update your copy to agree with it. Set all the virtual screen
* change bits, to force a full update.
*/
#if MOUSE
hidden = 0;
#endif
if (sgarbf != FALSE)
{
for (i = 0; i < term.t_nrow; ++i)
{ int j;
vscreen[i]->v_flag |= VFCHG;
for (j = 0; j < term.t_ncol; j++)
pscreen[i]->v_text[j] = NORMATTR * 256 + ' ';
}
#if MOUSE
if (!hidden && mouse)
{ msm_hidecursor();
hidden++;
}
#endif
ttrow = HUGE;
ttcol = HUGE; // don't know where they are
movecursor(0, 0); /* Erase the screen. */
(*term.t_eeop)();
sgarbf = FALSE; /* Erase-page clears */
mpresf = FALSE; /* the message area. */
}
#if !(IBMPC || _WIN32)
/* Here we check to see if we can scroll any of the lines.
* This silly routine just checks for possibilites of scrolling
* lines one line in either direction, but not multiple lines.
*/
if( !term.t_scrollup ) goto no_scroll_possible;
scroll_done_flag = 0;
for (i = 0; i < term.t_nrow; i++)
{
if( (vscreen[i]->v_flag&VFCHG) != 0 )
{
/* if not first line */
/* and current line is identical to previous line */
/* and previous line is not blank */
if( i > 0
&& vscreen[i - 1]->v_flag & VFCHG
&& strcmp(vscreen[i]->v_text,pscreen[i-1]->v_text) == 0
&& strcmp(pscreen[i-1]->v_text,blnk_ln) != 0 )
{
/* Scroll screen down */
l_first = i-1; /* first line of scrolling region */
while( i<term.t_nrow
&& vscreen[i - 1]->v_flag & VFCHG
&& strcmp(vscreen[i]->v_text,pscreen[i-1]->v_text)==0 )
i++;
l_last = i-1; /* last line of scrolling region */
(*term.t_scrolldn)( l_first, l_last );
scroll_done_flag++;
for( j = l_first+1; j < l_last+1; j++ )
vscreen[j]->v_flag &= ~VFCHG;
for( j = l_last; j > l_first; j-- )
memcpy(pscreen[j]->v_text,
pscreen[j - 1]->v_text,term.t_ncol);
memset(pscreen[l_first]->v_text,' ',term.t_ncol);
/* Set change flag on last line to get rid of */
/* bug that caused lines to 'vanish'. */
vscreen[l_first]->v_flag |= VFCHG;
}
else if( i < term.t_nrow-1
&& vscreen[i + 1]->v_flag & VFCHG
&& strcmp(vscreen[i]->v_text,pscreen[i+1]->v_text) == 0
&& strcmp(pscreen[i+1]->v_text,blnk_ln) != 0 )
{
l_first = i;
while( i<term.t_nrow-1
&& vscreen[i + 1]->v_flag & VFCHG
&& strcmp(vscreen[i]->v_text,pscreen[i+1]->v_text)==0 )
i++;
l_last = i;
(*term.t_scrollup)( l_first, l_last );
scroll_done_flag++;
for( j = l_first; j < l_last; j++ )
vscreen[j]->v_flag &= ~VFCHG;
for( j = l_first; j < l_last; j++ )
memcpy(pscreen[j]->v_text,
pscreen[j + 1]->v_text,term.t_ncol);
memset(pscreen[l_last]->v_text,' ',term.t_ncol);
/* Set change flag on last line to get rid of */
/* bug that caused lines to 'vanish'. */
vscreen[l_last]->v_flag |= VFCHG;
}
}
}
if( scroll_done_flag )
{
ttrow = ttrow-1; /* force a change */
movecursor(currow, curcol - curwp->w_startcol);
}
no_scroll_possible:
#endif
/* Make sure that the physical and virtual displays agree. Unlike before,
* the "updateline" code is only called with a line that has been updated
* for sure.
*/
for (i = 0; i < term.t_nrow; ++i)
{
vp1 = vscreen[i];
if ((vp1->v_flag&VFCHG) != 0)
{
#if MOUSE
if (!hidden && mouse)
{ msm_hidecursor();
hidden++;
}
#endif
vp1->v_flag &= ~VFCHG;
vp2 = pscreen[i];
updateline(i, &vp1->v_text[0], &vp2->v_text[0]);
}
}
/* Finally, update the hardware cursor and flush out buffers. */
#if IBMPC || _WIN32
(*term.t_move)(currow,curcol - curwp->w_startcol); /* putline() trashed the cursor pos */
ttrow = currow;
ttcol = curcol - curwp->w_startcol;
#else
movecursor(currow, curcol - curwp->w_startcol);
#endif
(*term.t_flush)();
#if MOUSE
if (hidden && mouse)
msm_showcursor();
#endif
}
/*
* Update a single line. This does not know how to use insert or delete
* character sequences; we are using VT52 functionality. Update the physical
* row and column variables. It does try an exploit erase to end of line. The
* RAINBOW version of this routine uses fast video.
*/
#if !IBMPC && !_WIN32
void updateline(int row, char vline[], char pline[])
{
#if RAINBOW
register char *cp1;
register char *cp2;
register int nch;
int n;
cp1 = &vline[0]; /* Use fast video. */
cp2 = &pline[0];
n = strlen(cp1);
if (n > term.t_ncol)
n = term.t_ncol;
Put_Data(row+1, 1, n, cp1);
nch = term.t_ncol;
do
{
*cp2 = *cp1;
++cp2;
++cp1;
}
while (--nch);
#else
register char *cp1;
register char *cp2;
register char *cp3;
register char *cp4;
register char *cp5;
register int nbflag;
static int tstand = FALSE; /* TRUE if standout mode is active */
cp1 = &vline[0]; /* Compute left match. */
cp2 = &pline[0];
while (cp1!=&vline[term.t_ncol] && cp1[0]==cp2[0])
{
++cp1;
++cp2;
}
/* This can still happen, even though we only call this routine on changed
* lines. A hard update is always done when a line splits, a massive
* change is done, or a buffer is displayed twice. This optimizes out most
* of the excess updating. A lot of computes are used, but these tend to
* be hard operations that do a lot of update, so I don't really care.
*/
if (cp1 == &vline[term.t_ncol]) /* All equal. */
return;
nbflag = FALSE;
cp3 = &vline[term.t_ncol]; /* Compute right match. */
cp4 = &pline[term.t_ncol];
while (cp3[-1] == cp4[-1])
{
--cp3;
--cp4;
if (cp3[0] != ' ') /* Note if any nonblank */
nbflag = TRUE; /* in right match. */
}
cp5 = cp3;
if (nbflag == FALSE) /* Erase to EOL ? */
{
while (cp5!=cp1 && cp5[-1]==' ')
--cp5;
if (cp3-cp5 <= 3) /* Use only if erase is */
cp5 = cp3; /* fewer characters. */
}
movecursor(row, cp1-&vline[0]); /* Go to start of line. */
while (cp1 != cp5) /* Ordinary. */
{
if( *cp1 & STANDATTR )
{ if( !tstand ) { (*term.t_standout)(); tstand = TRUE; } }
else
{ if( tstand ) { (*term.t_standend)(); tstand = FALSE; } }
(*term.t_putchar)(*cp1 & ~STANDATTR);
++ttcol;
*cp2++ = *cp1++;
}
if (cp5 != cp3) /* Erase. */
{
(*term.t_eeol)();
while (cp1 != cp3)
*cp2++ = *cp1++;
}
if( tstand )
{ (*term.t_standend)();
tstand = FALSE;
}
#endif
}
#endif /* !IBMPC */
/*
* Redisplay the mode line for the window pointed to by the "wp". This is the
* only routine that has any idea of how the modeline is formatted. You can
* change the modeline format by hacking at this routine. Called by "update"
* any time there is a dirty window.
*/
modeline(wp)
WINDOW *wp;
{
register char *cp;
register int c;
register int n;
register BUFFER *bp;
n = wp->w_toprow+wp->w_ntrows; /* Location. */
vscreen[n]->v_flag |= VFCHG; /* Redraw next time. */
vtmove(n, 0); /* Seek to right line. */
attr = MODEATTR;
bp = wp->w_bufp;
if (bp->b_flag & BFRDONLY)
vtputc('R',0,0);
else if ((bp->b_flag&BFCHG) != 0) /* "*" if changed. */
vtputc('*',0,0);
else
vtputc('-',0,0);
vtputs(EMACSREV,0,0);
vtputc(' ', 0, 0);
if (filcmp(bp->b_bname,bp->b_fname))
{ vtputs("-- Buffer: ",0,0);
vtputs(bp->b_bname,0,0);
vtputc(' ',0,0);
}
if (bp->b_fname[0] != 0) /* File name. */
{
vtputs("-- File: ",0,0);
vtputs(bp->b_fname,0,0);
vtputc(' ',0,0);
}
#if WFDEBUG
vtputc('-',0,0);
vtputc((wp->w_flag&WFMODE)!=0 ? 'M' : '-',0,0);
vtputc((wp->w_flag&WFHARD)!=0 ? 'H' : '-',0,0);
vtputc((wp->w_flag&WFEDIT)!=0 ? 'E' : '-',0,0);
vtputc((wp->w_flag&WFMOVE)!=0 ? 'V' : '-',0,0);
vtputc((wp->w_flag&WFFORCE)!=0 ? 'F' : '-',0,0);
#endif
while (vtcol < term.t_ncol) /* Pad to full width. */
vtputc('-',0,0);
}
/*
* Send a command to the terminal to move the hardware cursor to row "row"
* and column "col". The row and column arguments are origin 0. Optimize out
* random calls. Update "ttrow" and "ttcol".
*/
movecursor(row, col)
{
if (row!=ttrow || col!=ttcol)
{
ttrow = row;
ttcol = col;
(*term.t_move)(row, col);
}
}
/*
* Erase the message line. This is a special routine because the message line
* is not considered to be part of the virtual screen. It always works
* immediately; the terminal buffer is flushed via a call to the flusher.
*/
mlerase()
{
int i;
register VIDEO *vp;
vp = vscreen[term.t_nrow - 1];
for (i = 0; i < term.t_ncol; i++)
vp->v_text[i] = EOLATTR | ' ';
vp->v_flag |= VFCHG;
mpresf = FALSE;
}
/*
* Ask a yes or no question in the message line. Return either TRUE, FALSE, or
* ABORT. The ABORT status is returned if the user bumps out of the question
* with a ^G. Used any time a confirmation is required.
*/
mlyesno(prompt)
char *prompt;
{
register int s;
char buf[64];
for (;;)
{
buf[0] = 0;
s = mlreply(prompt, buf, sizeof(buf));
if (s == ABORT)
return (ABORT);
if (s != FALSE)
{
if (buf[0]=='y' || buf[0]=='Y')
return (TRUE);
if (buf[0]=='n' || buf[0]=='N')
return (FALSE);
}
}
}
/***********************************
* Simple circular history buffer for message line.
*/
#define HISTORY_MAX 10
char *history[HISTORY_MAX];
int history_top;
#define HDEC(hi) ((hi == 0) ? HISTORY_MAX - 1 : hi - 1)
#define HINC(hi) ((hi == HISTORY_MAX - 1) ? 0 : hi + 1)
/*
* Write a prompt into the message line, then read back a response. Keep
* track of the physical position of the cursor. If we are in a keyboard