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DISPLAY.C
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C/C++ Source or Header
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1992-10-08
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45KB
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1,970 lines
/*
* 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.
*
*/
#include <stdio.h>
#include "estruct.h"
#include "eproto.h"
#include "edef.h"
#include "elang.h"
static VIDEO **vscreen; /* Virtual screen. */
#if MEMMAP == 0
static VIDEO **pscreen; /* Physical screen. */
#endif
#if WINDOW_MSWIN
static int foulcursor = FALSE; /* see vtscreen() & movecursor() */
#endif
#if WINDOW_MSWIN
#define MROW (term.t_nrow)
#define MCOL (term.t_ncol)
#else
#define MROW (term.t_mrow)
#defien MCOL (term.t_mcol)
#endif
/* some local function declarations */
#if PROTO
#if MEMMAP
extern PASCAL NEAR updateline(int row, struct VIDEO *vp1);
#else
extern PASCAL NEAR updateline(int row, struct VIDEO *vp1, struct VIDEO *vp2);
#endif
#else
extern PASCAL NEAR updateline();
#endif
/*
* 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".
*/
PASCAL NEAR vtinit()
{
register int i;
register VIDEO *vp;
int result;
TTopen(); /* open the screen */
TTkopen(); /* open the keyboard */
TTrev(FALSE);
/* allocate the virtual screen pointer array */
vscreen = (VIDEO **) malloc(MROW*sizeof(VIDEO *));
if (vscreen == NULL)
#if WINDOW_MSWIN
return FALSE;
#else
meexit(1);
#endif
#if MEMMAP == 0
/* allocate the physical shadow screen array */
pscreen = (VIDEO **) malloc(MROW*sizeof(VIDEO *));
if (pscreen == NULL)
#if WINDOW_MSWIN
return FALSE;
#else
meexit(1);
#endif
#endif
result = TRUE;
/* for every line in the display */
for (i = 0; i < MROW; ++i) {
/* allocate a virtual screen line */
vp = (VIDEO *) malloc(sizeof(VIDEO)+MCOL);
if (vp == NULL) {
#if WINDOW_MSWIN
result = FALSE;
#else
meexit(1);
#endif
}
else {
vp->v_flag = 0; /* init change flags */
#if COLOR
vp->v_rfcolor = 7; /* init fore/background colors */
vp->v_rbcolor = 0;
#endif
}
/* connect virtual line to line array */
vscreen[i] = vp;
#if MEMMAP == 0
/* allocate and initialize physical shadow screen line */
vp = (VIDEO *) malloc(sizeof(VIDEO)+MCOL);
if (vp == NULL) {
#if WINDOW_MSWIN
result = FALSE;
#else
meexit(1);
#endif
}
else {
vp->v_flag = VFNEW;
#if INSDEL
vp->v_rline = i; /* set requested line position */
#endif
}
pscreen[i] = vp;
#endif
}
return result;;
}
#if CLEAN || WINDOW_MSWIN
/* free up all the dynamically allocated video structures */
PASCAL NEAR vtfree()
{
int i;
for (i = 0; i < MROW; ++i) {
if (vscreen && vscreen[i]) free(vscreen[i]);
#if MEMMAP == 0
if (pscreen && pscreen[i]) free(pscreen[i]);
#endif
}
if (vscreen) free(vscreen);
#if MEMMAP == 0
if (pscreen) free(pscreen);
#endif
}
#endif
#if WINDOW_MSWIN
/* vtscreen: map a screen into the Virtual Terminal system */
/* ======== */
PASCAL NEAR vtscreen (SCREEN *sp)
{
TTflush();
term.t_roworg = sp->s_roworg;
term.t_colorg = sp->s_colorg;
term.t_nrow = sp->s_nrow;
term.t_ncol = sp->s_ncol;
vscreen = sp->s_virtual;
pscreen = sp->s_physical;
term.t_selscr (sp);
foulcursor = TRUE;
} /* vtscreen */
/* vtinitscr: build a virtual terminal resource for a new screen */
/* ========= */
int PASCAL NEAR vtinitscr (SCREEN *sp, int nrow, int ncol)
/* returns TRUE if successful */
{
int result;
if (nrow < 2) nrow = 2;
term.t_nrow = nrow;
term.t_ncol = ncol;
term.t_roworg = 0;
term.t_colorg = 0;
if ((result = vtinit ()) == TRUE) {
sp->s_virtual = vscreen;
sp->s_physical = pscreen;
sp->s_nrow = nrow;
sp->s_ncol = ncol;
sp->s_roworg = 0;
sp->s_colorg = 0;
}
else {
vtfree ();
sp->s_virtual = NULL;
sp->s_physical = NULL;
}
return result;
} /* vtinitscr */
/* vtfreescr: delete a virtual terminal resource for a dying screen */
/* ========= */
PASCAL NEAR vtfreescr (SCREEN *sp)
{
vtscreen (sp);
vtfree ();
vtscreen (first_screen); /* switch to an existing screen */
} /* vtfreescr */
/* vtsizescr: resize the virtual terminal resources */
/* ========= */
int PASCAL NEAR vtsizescr (SCREEN *sp, int nrow, int ncol)
/* returns TRUE if successful. Otherwise, the old VIDEO structures are
preserved. */
{
VIDEO **oldvvp, **oldpvp;
int oldnrow, oldncol;
oldvvp = sp->s_virtual;
oldpvp = sp->s_physical;
oldnrow = sp->s_nrow;
oldncol = sp->s_ncol;
if (vtinitscr (sp, nrow, ncol) == TRUE) {
/* success! let's free the old VIDEO structures */
WINDOW *wp;
vscreen = oldvvp;
pscreen = oldpvp;
term.t_nrow = oldnrow;
term.t_ncol = oldncol;
vtfree (); /* get rid of the old VIDEOs (kept up to now in
case the new allocation had failed) */
vtscreen (sp); /* put the new VIDEOs into active duty */
for (wp = sp->s_first_window; wp != NULL; wp = wp->w_wndp) {
/* the VIDEOs have been wiped clean. Let's have every window
marked for a complete redraw */
wp->w_flag |= WFHARD|WFMODE;
}
term.t_sizscr (sp); /* resize the MDI window */
return TRUE;
}
else {
/* failure! we still need some kind of VIDEO structures, so we
reuse the old ones */
term.t_nrow = oldnrow;
term.t_ncol = oldncol;
sp->s_virtual = vscreen = oldvvp;
sp->s_physical = pscreen = oldpvp;
mlabort (TEXT94); /* "out of memory" */
return FALSE;
}
} /* vtsizescr */
#endif
/*
* 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.
*/
PASCAL NEAR vttidy()
{
mlerase();
movecursor(term.t_nrow, 0);
TTflush();
TTclose();
TTkclose();
}
/*
* 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.
*/
PASCAL NEAR vtmove(row, col)
int row, col;
{
vtrow = row;
vtcol = col;
}
/* Write a character to the virtual screen. The virtual row and
column are updated. If we are not yet on left edge, don't print
it yet. If the line is too long put a "$" in the last column.
This routine only puts printing characters into the virtual
terminal buffers. Only column overflow is checked.
*/
PASCAL NEAR vtputc(c)
int c;
{
register VIDEO *vp; /* ptr to line being updated */
vp = vscreen[vtrow];
if (c == '\t') {
do {
vtputc(' ');
} while (((vtcol + taboff) % (tabsize)) != 0);
} else if (vtcol >= term.t_ncol) {
++vtcol;
vp->v_text[term.t_ncol - 1] = '$';
} else if (disphigh && c > 0x7f) {
vtputc('^');
vtputc('!');
c -= 0x80;
if (c == '\t') {
vtputc('^');
vtputc('I');
} else
vtputc(c);
} else if (c < 0x20 || c == 0x7F) {
vtputc('^');
vtputc(c ^ 0x40);
} else {
if (vtcol >= 0)
vp->v_text[vtcol] = c;
++vtcol;
}
}
/*
* Erase from the end of the software cursor to the end of the line on which
* the software cursor is located.
*/
PASCAL NEAR vteeol()
{
register VIDEO *vp;
vp = vscreen[vtrow];
while (vtcol < term.t_ncol) {
if (vtcol >= 0)
vp->v_text[vtcol] = ' ';
vtcol++;
}
}
/* upscreen: user routine to force a screen update
always finishes complete update */
PASCAL NEAR upscreen(f, n)
int f,n; /* prefix flag and argument */
{
update(TRUE);
return(TRUE);
}
/*
* 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.
*/
PASCAL NEAR update(force)
int force; /* force update past type ahead? */
{
register WINDOW *wp;
#if WINDOW_MSWIN
SCREEN *sp;
#endif
#if TYPEAH
if (force == FALSE && typahead())
return(TRUE);
#endif
#if VISMAC == 0
if (force == FALSE && kbdmode == PLAY)
return(TRUE);
#endif
#if WINDOW_MSWIN
if (force == FALSE) {
defferupdate = TRUE;
return TRUE;
}
else defferupdate = FALSE;
/* loop through all screens to update even partially hidden ones.
Note that we process the "first" screen last */
sp = first_screen;
do {
char scroll_flag = 0;
int scroll_fcol;
static WINDOW *scroll_wp = (WINDOW *)NULL;
sp = sp->s_next_screen;
if (sp == (SCREEN *)NULL) {
sp = first_screen;
sp->s_cur_window = curwp; /* not always up to date */
}
vtscreen (sp);
wheadp = sp->s_first_window;
scroll_fcol = sp->s_cur_window->w_fcol;
#endif
/* update any windows that need refreshing */
wp = wheadp;
while (wp != NULL) {
if (wp->w_flag) {
/* if the window has changed, service it */
reframe(wp); /* check the framing */
if ((wp->w_flag & ~WFMODE) == WFEDIT)
updone(wp); /* update EDITed line */
else if (wp->w_flag & ~WFMOVE)
updall(wp); /* update all lines */
if (wp->w_flag & WFMODE)
modeline(wp); /* update modeline */
#if WINDOW_MSWIN
if (wp == sp->s_cur_window) {
if (wp != scroll_wp) {
/* switched to another window, force update
of both scroll bars */
scroll_flag = WFHARD;
scroll_wp = wp;
}
else scroll_flag = wp->w_flag & WFHARD;
}
#endif
wp->w_flag = 0;
wp->w_force = 0;
}
#if 1 /* take this out before the release! */
if (wp->w_wndp == wheadp) { /* erroneously circular list */
wp->w_wndp = (WINDOW *)NULL;
mlwrite("DAN!!! a bogus circular window list!!!");
TTgetc();
}
#endif
/* on to the next window */
wp = wp->w_wndp;
}
/* recalc the current hardware cursor location */
#if WINDOW_MSWIN
if (sp == first_screen) {
updpos();
}
#else
updpos();
#endif
#if MEMMAP
/* update the cursor and flush the buffers */
movecursor(currow, curcol - lbound);
#endif
/* check for lines to de-extend */
upddex();
/* if screen is garbage, re-plot it */
if (sgarbf != FALSE)
if (gflags & GFSDRAW)
sgarbf = FALSE;
else
updgar();
/* update the virtual screen to the physical screen */
updupd(force);
#if WINDOW_MSWIN
if (scroll_fcol != sp->s_cur_window->w_fcol) {
scroll_flag |= WFMOVE;
}
if (scroll_flag) updscrollbars(sp, scroll_flag);
} while (sp != first_screen);
sgarbf = FALSE;
#endif
/* update the cursor and flush the buffers */
movecursor(currow, curcol - lbound);
TTflush();
return(TRUE);
}
/* reframe: check to see if the cursor is on in the window
and re-frame it if needed or wanted */
PASCAL NEAR reframe(wp)
WINDOW *wp;
{
register LINE *lp; /* search pointer */
register LINE *rp; /* reverse search pointer */
register LINE *hp; /* ptr to header line in buffer */
register LINE *tp; /* temp debugging pointer */
register int i; /* general index/# lines to scroll */
register int nlines; /* number of lines in current window */
/* figure out our window size */
nlines = wp->w_ntrows;
if (modeflag == FALSE)
nlines++;
/* if not a requested reframe, check for a needed one */
if ((wp->w_flag & WFFORCE) == 0) {
lp = wp->w_linep;
for (i = 0; i < nlines; i++) {
/* if the line is in the window, no reframe */
if (lp == wp->w_dotp)
return(TRUE);
/* if we are at the end of the file, reframe */
if (lp == wp->w_bufp->b_linep)
break;
/* on to the next line */
lp = lforw(lp);
}
}
/* reaching here, we need a window refresh */
i = wp->w_force;
/* if smooth scrolling is enabled,
first.. have we gone off the top? */
if (sscroll && ((wp->w_flag & WFFORCE) == 0)) {
/* search thru the buffer looking for the point */
tp = lp = rp = wp->w_linep;
hp = wp->w_bufp->b_linep;
while ((lp != hp) || (rp != hp)) {
/* did we scroll downward? */
if (lp == wp->w_dotp) {
i = nlines - 1;
break;
}
/* did we scroll upward? */
if (rp == wp->w_dotp) {
i = 0;
break;
}
/* advance forward and back */
if (lp != hp)
lp = lforw(lp);
if (rp != hp)
rp = lback(rp);
/* problems????? */
if (lp == tp || rp == tp) {
mlforce("BUG IN SMOOTH SCROLL--GET DAN!\n");
TTgetc();
}
}
/* how far back to reframe? */
} else if (i > 0) { /* only one screen worth of lines max */
if (--i >= nlines)
i = nlines - 1;
} else if (i < 0) { /* negative update???? */
i += nlines;
if (i < 0)
i = 0;
} else
i = nlines / 2;
/* backup to new line at top of window */
lp = wp->w_dotp;
while (i != 0 && lback(lp) != wp->w_bufp->b_linep) {
--i;
if (i < 0) {
mlforce("OTHER BUG IN DISPLAY --- GET DAN!!!\n");
TTgetc();
}
lp = lback(lp);
}
/* and reset the current line at top of window */
wp->w_linep = lp;
wp->w_flag |= WFHARD;
wp->w_flag &= ~WFFORCE;
return(TRUE);
}
/* updone: update the current line to the virtual screen */
PASCAL NEAR updone(wp)
WINDOW *wp; /* window to update current line in */
{
register LINE *lp; /* line to update */
register int sline; /* physical screen line to update */
register int i;
/* search down the line we want */
lp = wp->w_linep;
sline = wp->w_toprow;
while (lp != wp->w_dotp) {
++sline;
lp = lforw(lp);
}
/* and update the virtual line */
vscreen[sline]->v_flag |= VFCHG;
vscreen[sline]->v_flag &= ~VFREQ;
taboff = wp->w_fcol;
vtmove(sline, -taboff);
for (i=0; i < llength(lp); ++i)
vtputc(lgetc(lp, i));
#if COLOR
vscreen[sline]->v_rfcolor = wp->w_fcolor;
vscreen[sline]->v_rbcolor = wp->w_bcolor;
#endif
vteeol();
taboff = 0;
}
/* updall: update all the lines in a window on the virtual screen */
PASCAL NEAR updall(wp)
WINDOW *wp; /* window to update lines in */
{
register LINE *lp; /* line to update */
register int sline; /* physical screen line to update */
register int i;
register int nlines; /* number of lines in the current window */
/* search down the lines, updating them */
lp = wp->w_linep;
sline = wp->w_toprow;
nlines = wp->w_ntrows;
if (modeflag == FALSE)
nlines++;
taboff = wp->w_fcol;
while (sline < wp->w_toprow + nlines) {
/* and update the virtual line */
vscreen[sline]->v_flag |= VFCHG;
vscreen[sline]->v_flag &= ~VFREQ;
vtmove(sline, -taboff);
if (lp != wp->w_bufp->b_linep) {
/* if we are not at the end */
for (i=0; i < llength(lp); ++i)
vtputc(lgetc(lp, i));
lp = lforw(lp);
}
/* make sure we are on screen */
if (vtcol < 0)
vtcol = 0;
/* on to the next one */
#if COLOR
vscreen[sline]->v_rfcolor = wp->w_fcolor;
vscreen[sline]->v_rbcolor = wp->w_bcolor;
#endif
vteeol();
++sline;
}
taboff = 0;
}
/* updpos: update the position of the hardware cursor and handle extended
lines. This is the only update for simple moves. */
PASCAL NEAR updpos()
{
register LINE *lp;
register int c;
register int i;
/* find the current row */
lp = curwp->w_linep;
currow = curwp->w_toprow;
while (lp != curwp->w_dotp) {
++currow;
lp = lforw(lp);
}
/* find the current column */
curcol = 0;
i = 0;
while (i < curwp->w_doto) {
c = lgetc(lp, i++);
if (c == '\t')
curcol += - (curcol % tabsize) + (tabsize - 1);
else {
if (disphigh && c > 0x7f) {
curcol += 2;
c -= 0x80;
}
if (c < 0x20 || c == 0x7f)
++curcol;
}
++curcol;
}
/* adjust by the current first column position */
curcol -= curwp->w_fcol;
/* make sure it is not off the left side of the screen */
while (curcol < 0) {
if (curwp->w_fcol >= hjump) {
curcol += hjump;
curwp->w_fcol -= hjump;
} else {
curcol += curwp->w_fcol;
curwp->w_fcol = 0;
}
curwp->w_flag |= WFHARD | WFMODE;
}
/* if horizontall scrolling is enabled, shift if needed */
if (hscroll) {
while (curcol >= term.t_ncol - 1) {
curcol -= hjump;
curwp->w_fcol += hjump;
curwp->w_flag |= WFHARD | WFMODE;
}
} else {
/* if extended, flag so and update the virtual line image */
if (curcol >= term.t_ncol - 1) {
vscreen[currow]->v_flag |= (VFEXT | VFCHG);
updext();
} else
lbound = 0;
}
/* update the current window if we have to move it around */
if (curwp->w_flag & WFHARD)
updall(curwp);
if (curwp->w_flag & WFMODE)
modeline(curwp);
curwp->w_flag = 0;
}
/* upddex: de-extend any line that derserves it */
PASCAL NEAR upddex()
{
register WINDOW *wp;
register LINE *lp;
register int i,j;
register int nlines; /* number of lines in the current window */
wp = wheadp;
while (wp != NULL) {
lp = wp->w_linep;
i = wp->w_toprow;
nlines = wp->w_ntrows;
if (modeflag == FALSE)
nlines++;
while (i < wp->w_toprow + nlines) {
if (vscreen[i]->v_flag & VFEXT) {
if ((wp != curwp) || (lp != wp->w_dotp) ||
(curcol < term.t_ncol - 1)) {
taboff = wp->w_fcol;
vtmove(i, -taboff);
for (j = 0; j < llength(lp); ++j)
vtputc(lgetc(lp, j));
vteeol();
taboff = 0;
/* this line no longer is extended */
vscreen[i]->v_flag &= ~VFEXT;
vscreen[i]->v_flag |= VFCHG;
}
}
lp = lforw(lp);
++i;
}
/* and onward to the next window */
wp = wp->w_wndp;
}
}
/* updgar: if the screen is garbage, clear the physical screen and
the virtual screen and force a full update */
PASCAL NEAR updgar()
{
register int i;
#if MEMMAP == 0
register int j;
register char *txt;
#endif
for (i = 0; i < term.t_nrow; ++i) {
vscreen[i]->v_flag |= VFCHG;
#if REVSTA
vscreen[i]->v_flag &= ~VFREV;
#endif
#if COLOR
vscreen[i]->v_fcolor = gfcolor;
vscreen[i]->v_bcolor = gbcolor;
#endif
#if MEMMAP == 0
txt = pscreen[i]->v_text;
for (j = 0; j < term.t_ncol; ++j)
txt[j] = ' ';
#endif
}
movecursor(0, 0); /* Erase the screen. */
#if COLOR && WINDOW_MSWIN
TTforg (gfcolor); /* inform the driver of the colors */
TTbacg (gbcolor); /* to be used for erase to end of page */
#endif
#if REVSTA && WINDOW_MSWIN
TTrev (FALSE);
#endif
(*term.t_eeop)();
#if !WINDOW_MSWIN
sgarbf = FALSE; /* Erase-page clears */
mpresf = FALSE; /* the message area. */
#endif
#if COLOR
mlerase(); /* needs to be cleared if colored */
#if WINDOW_MSWIN
mpresf = FALSE;
#endif
#endif
}
#if !WINDOW_MSWIN
/* for simple screen size changes (no window re-allocation involved)
do the following things
*/
PASCAL NEAR update_size()
{
/* if we need the size update */
if ((first_screen->s_roworg != term.t_roworg) |
(first_screen->s_colorg != term.t_colorg) |
(first_screen->s_nrow != term.t_nrow) |
(first_screen->s_ncol != term.t_ncol)) {
/* reset the terminal drivers size concept */
term.t_roworg = first_screen->s_roworg;
term.t_colorg = first_screen->s_colorg;
term.t_nrow = first_screen->s_nrow;
term.t_ncol = first_screen->s_ncol;
/* make sure the update routines know we need a full update */
sgarbf = TRUE;
}
}
#endif
/* Display a pop up window. Page it for the user. Any key other
than a space gets pushed back into the input stream to be interpeted
later as a command.
*/
#if PROTO
int PASCAL NEAR pop(BUFFER *popbuf)
#else
int PASCAL NEAR pop(popbuf)
BUFFER *popbuf;
#endif
{
register int index; /* index into the current output line */
register int llen; /* length of the current output line */
register int cline; /* current screen line number */
LINE *lp; /* ptr to next line to display */
int numlines; /* remaining number of lines to display */
int c; /* input character */
/* add the barrior line to the end of the pop up buffer */
addline(popbuf, "------------------------------------------");
/* set up to scan pop up buffer */
lp = lforw(popbuf->b_linep);
/* mlerase(); do we really need this? */
numlines = term.t_nrow-2;
cline = 0;
while (lp != popbuf->b_linep) {
/* update the virtual screen image for this one line */
vtmove(cline, 0);
llen = llength(lp);
for (index = 0; index < llen; index++)
vtputc(lp->l_text[index]);
vteeol();
#if COLOR
vscreen[cline]->v_rfcolor = gfcolor;
vscreen[cline]->v_rbcolor = gbcolor;
#endif
vscreen[cline]->v_flag &= ~VFREQ;
vscreen[cline++]->v_flag |= VFCHG|VFCOL;
if (numlines-- < 1) {
/* update the virtual screen to the physical screen */
updupd(FALSE);
/* tell the user there is more */
mlwrite("--- more ---");
TTflush();
/* and see if they want more */
if ((c = tgetc()) != ' ') {
cpending = TRUE;
charpending = c;
upwind();
return(TRUE);
}
/* reset the line counters */
numlines = term.t_nrow-2;
cline = 0;
}
/* on to the next line */
lp = lforw(lp);
}
if (numlines > 0) {
/* update the virtual screen to the physical screen */
updupd(FALSE);
TTflush();
if ((c = tgetc()) != ' ') {
cpending = TRUE;
charpending = c;
}
}
upwind();
return(TRUE);
}
/* updupd: update the physical screen from the virtual screen */
PASCAL NEAR updupd(force)
int force; /* forced update flag */
{
register VIDEO *vp1;
register int i;
for (i = 0; i < term.t_nrow; ++i) {
vp1 = vscreen[i];
/* for each line that needs to be updated*/
if ((vp1->v_flag & VFCHG) != 0) {
#if TYPEAH
if (force == FALSE && typahead())
return(TRUE);
#endif
#if MEMMAP
updateline(i, vp1);
#else
updateline(i, vp1, pscreen[i]);
#endif
}
}
return(TRUE);
}
/* updext: update the extended line which the cursor is currently
on at a column greater than the terminal width. The line
will be scrolled right or left to let the user see where
the cursor is
*/
PASCAL NEAR updext()
{
register int rcursor; /* real cursor location */
register LINE *lp; /* pointer to current line */
register int j; /* index into line */
/* calculate what column the real cursor will end up in */
rcursor = ((curcol - term.t_ncol) % term.t_scrsiz)
+ term.t_margin;
lbound = curcol - rcursor + 1;
taboff = lbound + curwp->w_fcol;
/* scan through the line outputing characters to the virtual screen */
/* once we reach the left edge */
vtmove(currow, -taboff); /* start scanning offscreen */
lp = curwp->w_dotp; /* line to output */
for (j=0; j<llength(lp); ++j) /* until the end-of-line */
vtputc(lgetc(lp, j));
/* truncate the virtual line, restore tab offset */
vteeol();
taboff = 0;
/* and put a '$' in column 1 */
vscreen[currow]->v_text[0] = '$';
}
/*
* 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.
*/
#if MEMMAP
/* UPDATELINE specific code for memory mapped displays */
PASCAL NEAR updateline(row, vp)
int row; /* row of screen to update */
struct VIDEO *vp; /* virtual screen image */
{
if (vp->v_flag & VFREQ)
TTrev(TRUE);
#if COLOR
scwrite(row, vp->v_text, vp->v_rfcolor, vp->v_rbcolor);
vp->v_fcolor = vp->v_rfcolor;
vp->v_bcolor = vp->v_rbcolor;
#else
scwrite(row, vp->v_text, 7, 0);
#endif
if (vp->v_flag & VFREQ)
TTrev(FALSE);
vp->v_flag &= ~(VFCHG | VFCOL); /* flag this line as changed */
}
#else
PASCAL NEAR updateline(row, vp, pp)
int row; /* row of screen to update */
struct VIDEO *vp; /* virtual screen image */
struct VIDEO *pp; /* physical screen image */
{
register char *cp1;
register char *cp2;
register char *cp3;
register char *cp4;
register char *cp5;
register int nbflag; /* non-blanks to the right flag? */
int rev; /* reverse video flag */
int req; /* reverse video request flag */
int upcol; /* update column (KRS) */
/* set up pointers to virtual and physical lines */
cp1 = &vp->v_text[0];
cp2 = &pp->v_text[0];
#if COLOR
TTforg(vp->v_rfcolor);
TTbacg(vp->v_rbcolor);
#endif
#if REVSTA | COLOR
/* if we need to change the reverse video status of the
current line, we need to re-write the entire line */
rev = (vp->v_flag & VFREV) == VFREV;
req = (vp->v_flag & VFREQ) == VFREQ;
if ((rev != req)
#if COLOR
|| (vp->v_fcolor != vp->v_rfcolor) || (vp->v_bcolor != vp->v_rbcolor)
#endif
#if HP150
/* the HP150 has some reverse video problems */
|| req || rev
#endif
) {
movecursor(row, 0); /* Go to start of line. */
/* set rev video if needed */
if (rev != req)
(*term.t_rev)(req);
/* scan through the line and dump it to the screen and
the virtual screen array */
cp3 = &vp->v_text[term.t_ncol];
while (cp1 < cp3) {
TTputc(*cp1);
++ttcol;
*cp2++ = *cp1++;
}
/* turn rev video off */
if (rev != req)
(*term.t_rev)(FALSE);
/* update the needed flags */
vp->v_flag &= ~VFCHG;
if (req)
vp->v_flag |= VFREV;
else
vp->v_flag &= ~VFREV;
#if COLOR
vp->v_fcolor = vp->v_rfcolor;
vp->v_bcolor = vp->v_rbcolor;
#endif
pp->v_flag &= ~VFNEW;
return(TRUE);
}
#endif
upcol = 0;
if (!(pp->v_flag & VFNEW)) {
/* advance past any common chars at the left */
while (cp1 != &vp->v_text[term.t_ncol] && cp1[0] == cp2[0]) {
++cp1;
++upcol;
++cp2;
}
#if DBCS
/* don't optimize on the left in the middle of a 2 byte char */
if ((cp1 > &vp->v_text[0]) && is2byte(vp->v_text, cp1 - 1)) {
--cp1;
--upcol;
--cp2;
}
#endif
/* 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 both lines are the same, no update needs to be done */
if (cp1 == &vp->v_text[term.t_ncol]) {
vp->v_flag &= ~VFCHG; /* flag this line is changed */
return(TRUE);
}
}
/* find out if there is a match on the right */
nbflag = FALSE;
cp3 = &vp->v_text[term.t_ncol];
cp4 = &pp->v_text[term.t_ncol];
if (!(pp->v_flag & VFNEW)) {
while (cp3[-1] == cp4[-1]) {
--cp3;
--cp4;
if (cp3[0] != ' ') /* Note if any nonblank */
nbflag = TRUE; /* in right match. */
}
#if DBCS
/* don't stop in the middle of a 2 byte char */
if (is2byte(vp->v_text, cp3-1) || is2byte(pp->v_text, cp4-1)) {
++cp3;
++cp4;
}
#endif
}
cp5 = cp3;
/* Erase to EOL ? */
if (nbflag == FALSE && eolexist == TRUE && (req != TRUE)) {
while (cp5!=cp1 && cp5[-1]==' ')
--cp5;
if (cp3-cp5 <= 3) /* Use only if erase is */
cp5 = cp3; /* fewer characters. */
}
/* move to the begining of the text to update */
movecursor(row, upcol);
#if REVSTA
if (rev)
TTrev(TRUE);
#endif
while (cp1 != cp5) { /* Ordinary. */
TTputc(*cp1);
++ttcol;
*cp2++ = *cp1++;
}
if (cp5 != cp3) { /* Erase. */
TTeeol();
while (cp1 != cp3)
*cp2++ = *cp1++;
}
#if REVSTA
if (rev)
TTrev(FALSE);
#endif
vp->v_flag &= ~VFCHG; /* flag this line as updated */
pp->v_flag &= ~VFNEW;
return(TRUE);
}
#endif
/*
* 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.
*/
PASCAL NEAR modeline(wp)
WINDOW *wp; /* window to update modeline for */
{
register char *cp;
register int c;
register int n; /* cursor position count */
register BUFFER *bp;
register int i; /* loop index */
register int lchar; /* character to draw line in buffer with */
register int firstm; /* is this the first mode? */
char tline[NLINE]; /* buffer for part of mode line */
char time[6]; /* to hold current time */
/* don't bother if there is none! */
if (modeflag == FALSE)
return;
n = wp->w_toprow+wp->w_ntrows; /* Location. */
/*
Note that we assume that setting REVERSE will cause the terminal
driver to draw with the inverted relationship of fcolor and
bcolor, so that when we say to set the foreground color to "white"
and background color to "black", the fact that "reverse" is
enabled means that the terminal driver actually draws "black" on a
background of "white". Makes sense, no? This way, devices for
which the color controls are optional will still get the "reverse"
signals.
*/
vscreen[n]->v_flag |= VFCHG | VFREQ | VFCOL; /* Redraw next time. */
#if COLOR
vscreen[n]->v_rfcolor = 7; /* black on */
vscreen[n]->v_rbcolor = 0; /* white.....*/
#endif
vtmove(n, 0); /* Seek to right line. */
if (wp == curwp) /* mark the current buffer */
lchar = '=';
else
#if REVSTA
if (revexist)
lchar = ' ';
else
#endif
lchar = '-';
bp = wp->w_bufp;
if ((bp->b_flag&BFTRUNC) != 0) /* "#" if truncated */
vtputc('#');
else
vtputc(lchar);
if ((bp->b_flag&BFCHG) != 0) /* "*" if changed. */
vtputc('*');
else
vtputc(lchar);
if ((bp->b_flag&BFNAROW) != 0) { /* "<>" if narrowed */
vtputc('<');
vtputc('>');
} else {
vtputc(lchar);
vtputc(lchar);
}
n = 4;
strcpy(tline, " "); /* Buffer name. */
#if !WINDOW_MSWIN /* we don't need that text, thanks to the
about box */
strcat(tline, PROGNAME);
strcat(tline, " ");
strcat(tline, VERSION);
strcat(tline, " ");
#endif
/* display the time on the bottom most modeline if active */
if (timeflag && wp->w_wndp == (WINDOW *)NULL) {
/* get the current time/date string */
getdtime(time);
if (strcmp(time, "") != 0) {
/* append the hour/min string */
strcat(tline, "[");
strcat(tline, time);
strcat(tline, "] ");
strcpy(lasttime, time);
}
}
/* are we horizontally scrolled? */
if (wp->w_fcol > 0) {
strcat(tline, "[<");
strcat(tline, int_asc(wp->w_fcol));
strcat(tline, "]");
}
/* display the point position in buffer if on current modeline */
if (posflag && wp == curwp) {
strcat(tline, "L:");
strcat(tline, int_asc(getlinenum(bp, wp->w_dotp)));
strcat(tline, " C:");
strcat(tline, int_asc(getccol(FALSE)));
strcat(tline, " ");
}
/* display the modes */
strcat(tline, "(");
firstm = TRUE;
for (i = 0; i < NUMMODES; i++) /* add in the mode flags */
if (wp->w_bufp->b_mode & (1 << i)) {
if (firstm != TRUE)
strcat(tline, " ");
firstm = FALSE;
strcat(tline, modename[i]);
}
strcat(tline,") ");
cp = &tline[0];
while ((c = *cp++) != 0) {
vtputc(c);
++n;
}
#if 0
vtputc(lchar);
vtputc((wp->w_flag&WFCOLR) != 0 ? 'C' : lchar);
vtputc((wp->w_flag&WFMODE) != 0 ? 'M' : lchar);
vtputc((wp->w_flag&WFHARD) != 0 ? 'H' : lchar);
vtputc((wp->w_flag&WFEDIT) != 0 ? 'E' : lchar);
vtputc((wp->w_flag&WFMOVE) != 0 ? 'V' : lchar);
vtputc((wp->w_flag&WFFORCE) != 0 ? 'F' : lchar);
vtputc(lchar);
n += 8;
#endif
vtputc(lchar);
vtputc(lchar);
vtputc(' ');
n += 3;
cp = &bp->b_bname[0];
while ((c = *cp++) != 0) {
vtputc(c);
++n;
}
vtputc(' ');
vtputc(lchar);
vtputc(lchar);
n += 3;
if (bp->b_fname[0] != 0) { /* File name. */
vtputc(' ');
++n;
cp = TEXT34;
/* "File: " */
while ((c = *cp++) != 0) {
vtputc(c);
++n;
}
cp = &bp->b_fname[0];
while ((c = *cp++) != 0) {
vtputc(c);
++n;
}
vtputc(' ');
++n;
}
while (n < term.t_ncol) { /* Pad to full width. */
vtputc(lchar);
++n;
}
}
VOID PASCAL NEAR getdtime(ts) /* get the current display time string */
char *ts;
{
char buf[80];
strcpy(buf, timeset());
if (strcmp(buf, errorm) == 0) {
*ts = 0;
return;
}
buf[16] = 0;
strcpy(ts, &buf[11]);
return;
}
VOID PASCAL NEAR upmode() /* update all the mode lines */
{
register WINDOW *wp;
#if WINDOW_MSWIN
SCREEN *sp;
/* loop through all screens to update even partially hidden ones.
Note that we process the "first" screen last */
sp = first_screen;
do {
sp = sp->s_next_screen;
if (sp == (SCREEN *)NULL) sp = first_screen;
vtscreen (sp);
wheadp = sp->s_first_window;
#endif
wp = wheadp;
while (wp != NULL) {
wp->w_flag |= WFMODE;
wp = wp->w_wndp;
}
#if WINDOW_MSWIN
} while (sp != first_screen);
#endif
}
VOID PASCAL NEAR upwind() /* force hard updates on all windows */
{
register WINDOW *wp;
#if WINDOW_MSWIN
SCREEN *sp;
/* loop through all screens to update even partially hidden ones.
Note that we process the "first" screen last */
sp = first_screen;
do {
sp = sp->s_next_screen;
if (sp == (SCREEN *)NULL) sp = first_screen;
vtscreen (sp);
wheadp = sp->s_first_window;
#endif
wp = wheadp;
while (wp != NULL) {
wp->w_flag |= WFHARD|WFMODE;
wp = wp->w_wndp;
}
#if WINDOW_MSWIN
} while (sp != first_screen);
#endif
}
/*
* 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".
*/
PASCAL NEAR movecursor(row, col)
int row, col;
{
#if WINDOW_MSWIN
if (row >= term.t_nrow) row = term.t_mrow;
/* emphasize move into message line to avoid confusion with
another, larger, screen */
if (defferupdate) update (TRUE);
/* a pending update could move the cursor somewhere else, so
we make sure it can't happen */
if (row!=ttrow || col!=ttcol || foulcursor) {
/* in MSWIN, the message line is a separate entity and a call to
vtscreen after a movecursor calls might actually have "stolen" the
cursor away from the message line! */
foulcursor = FALSE;
#else
if (row!=ttrow || col!=ttcol) {
#endif
ttrow = row;
ttcol = col;
TTmove(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.
*/
VOID PASCAL NEAR mlferase()
{
register int save_discmd;
save_discmd = discmd;
discmd = TRUE;
mlerase();
discmd = save_discmd;;
}
VOID PASCAL NEAR mlerase()
{
int i;
movecursor(term.t_nrow, 0);
if (discmd == FALSE)
return;
#if COLOR
TTforg(7);
TTbacg(gbcolor);
#endif
if (eolexist == TRUE)
TTeeol();
else {
for (i = 0; i < term.t_ncol - 1; i++)
TTputc(' ');
/* force the move! */
/* movecursor(term.t_nrow, 1);*/
movecursor(term.t_nrow, 0);
}
TTflush();
mpresf = FALSE;
}
/*
* Write a message into the message line. Keep track of the physical cursor
* position. A small class of printf like format items is handled. Assumes the
* stack grows down; this assumption is made by the "+=" in the argument scan
* loop. If STACK_GROWS_UP is set in estruct.h, then we'll assume that the
* stack grows up and use "-=" instead of "+=". Set the "message line"
* flag TRUE. Don't write beyond the end of the current terminal width.
*/
PASCAL NEAR mlout(c)
int c; /* character to write */
{
#if WINDOW_MSWIN
if (ttcol + 1 < NSTRING)
#else
if (ttcol + 1 < term.t_ncol)
#endif
TTputc(c);
if (c != '\b')
*lastptr++ = c;
else if (lastptr > &lastmesg[0])
--lastptr;
}
#if VARARG
#if VARG
CDECL NEAR mlwrite(va_alist)
va_dcl /* variable argument list
arg1 = format string
arg2+ = arguments in that string */
{
register int c; /* current char in format string */
register char *fmt; /* ptr to format string */
register va_list ap; /* ptr to current data field */
int arg_int; /* integer argument */
long arg_long; /* long argument */
char *arg_str; /* string argument */
/* if we are not currently echoing on the command line, abort this */
if (discmd == FALSE)
return;
#if COLOR
/* set up the proper colors for the command line */
TTforg(7);
TTbacg(gbcolor);
#endif
/* point to the first argument */
va_start(ap);
fmt = va_arg(ap, char *);
/* if we can not erase to end-of-line, do it manually */
if (eolexist == FALSE) {
mlerase();
TTflush();
}
movecursor(term.t_nrow, 0);
lastptr = &lastmesg[0]; /* setup to record message */
while ((c = *fmt++) != 0) {
if (c != '%') {
mlout(c);
++ttcol;
} else {
c = *fmt++;
switch (c) {
case 'd':
arg_int = va_arg(ap, int);
mlputi(arg_int, 10);
break;
case 'o':
arg_int = va_arg(ap, int);
mlputi(arg_int, 8);
break;
case 'x':
arg_int = va_arg(ap, int);
mlputi(arg_int, 16);
break;
case 'D':
arg_long = va_arg(ap, long);
mlputli(arg_long, 10);
break;
case 's':
arg_str = va_arg(ap, char *);
mlputs(arg_str);
break;
case 'f':
arg_int = va_arg(ap, int);
mlputf(arg_int);
break;
default:
mlout(c);
++ttcol;
}
}
}
/* if we can, erase to the end of screen */
if (eolexist == TRUE)
TTeeol();
TTflush();
mpresf = TRUE;
*lastptr = 0; /* terminate lastmesg[] */
va_end(ap);
}
#else
CDECL NEAR mlwrite(char *fmt, ...)
/* char * fmt;*/
/* variable argument list
arg1 = format string
arg2+ = arguments in that string */
{
register int c; /* current char in format string */
va_list ap; /* ptr to current data field */
int arg_int; /* integer argument */
long arg_long; /* long argument */
char *arg_str; /* string argument */
/* if we are not currently echoing on the command line, abort this */
if (discmd == FALSE)
return;
#if COLOR
/* set up the proper colors for the command line */
TTforg(7);
TTbacg(gbcolor);
#endif
/* point to the first argument */
va_start(ap, fmt);
/* if we can not erase to end-of-line, do it manually */
if (eolexist == FALSE) {
mlerase();
TTflush();
}
movecursor(term.t_nrow, 0);
lastptr = &lastmesg[0]; /* setup to record message */
while ((c = *fmt++) != 0) {
if (c != '%') {
mlout(c);
++ttcol;
} else {
c = *fmt++;
switch (c) {
case 'd':
arg_int = va_arg(ap, int);
mlputi(arg_int, 10);
break;
case 'o':
arg_int = va_arg(ap, int);
mlputi(arg_int, 8);
break;
case 'x':
arg_int = va_arg(ap, int);
mlputi(arg_int, 16);
break;
case 'D':
arg_long = va_arg(ap, long);
mlputli(arg_long, 10);
break;
case 's':
arg_str = va_arg(ap, char *);
mlputs(arg_str);
break;
case 'f':
arg_int = va_arg(ap, int);
mlputf(arg_int);
break;
default:
mlout(c);
++ttcol;
}
}
}
/* if we can, erase to the end of screen */
if (eolexist == TRUE)
TTeeol();
TTflush();
mpresf = TRUE;
*lastptr = 0; /* terminate lastmesg[] */
va_end(ap);
}
#endif
#else
#if STACK_GROWS_UP
#define ADJUST(ptr, dtype) ptr -= sizeof(dtype)
#else
#define ADJUST(ptr, dtype) ptr += sizeof(dtype)
#endif
CDECL NEAR mlwrite(fmt)
char *fmt; /* format string for output */
{
register int c; /* current char in format string */
register char *ap; /* ptr to current data field */
/* if we are not currently echoing on the command line, abort this */
if (discmd == FALSE)
return;
#if COLOR
/* set up the proper colors for the command line */
TTforg(7);
TTbacg(gbcolor);
#endif
/* point to the first argument */
ap = &fmt;
ADJUST(ap, char *);
/* if we can not erase to end-of-line, do it manually */
if (eolexist == FALSE) {
mlerase();
TTflush();
}
movecursor(term.t_nrow, 0);
lastptr = &lastmesg[0]; /* setup to record message */
while ((c = *fmt++) != 0) {
if (c != '%') {
mlout(c);
++ttcol;
} else {
c = *fmt++;
switch (c) {
case 'd':
mlputi(*(int *)ap, 10);
ADJUST(ap, int);
break;
case 'o':
mlputi(*(int *)ap, 8);
ADJUST(ap, int);
break;
case 'x':
mlputi(*(int *)ap, 16);
ADJUST(ap, int);
break;
case 'D':
mlputli(*(long *)ap, 10);
ADJUST(ap, long);
break;
case 's':
mlputs(*(char **)ap);
ADJUST(ap, char *);
break;
case 'f':
mlputf(*(int *)ap);
ADJUST(ap, int);
break;
default:
mlout(c);
++ttcol;
}
}
}
/* if we can, erase to the end of screen */
if (eolexist == TRUE)
TTeeol();
TTflush();
mpresf = TRUE;
*lastptr = 0; /* terminate lastmesg[] */
}
#endif
#if !WINDOW_MSWIN
/* display a serious error message (like "out of memory"). This is
replaced by a system-specific function when a multitasking system
that does not like these kind of errors is used, so that the user can
be offered to abort the application */
PASCAL NEAR mlabort(s)
char *s;
{
mlforce(s);
}
#endif
/* Force a string out to the message line regardless of the
current $discmd setting. This is needed when $debug is TRUE
and for the write-message and clear-message-line commands
*/
PASCAL NEAR mlforce(s)
char *s; /* string to force out */
{
register int oldcmd; /* original command display flag */
oldcmd = discmd; /* save the discmd value */
discmd = TRUE; /* and turn display on */
mlwrite(s); /* write the string out */
discmd = oldcmd; /* and restore the original setting */
}
/*
* Write out a string. Update the physical cursor position. This assumes that
* the characters in the string all have width "1"; if this is not the case
* things will get screwed up a little.
*/
PASCAL NEAR mlputs(s)
char *s;
{
register int c;
while ((c = *s++) != 0) {
mlout(c);
++ttcol;
}
}
/*
* Write out an integer, in the specified radix. Update the physical cursor
* position.
*/
PASCAL NEAR mlputi(i, r)
int i, r;
{
register int q;
static char hexdigits[] = "0123456789ABCDEF";
if (i < 0)
{
i = -i;
mlout('-');
}
q = i/r;
if (q != 0)
mlputi(q, r);
mlout(hexdigits[i%r]);
++ttcol;
}
/*
* do the same except as a long integer.
*/
PASCAL NEAR mlputli(l, r)
long l;
int r;
{
register long q;
if (l < 0)
{
l = -l;
mlout('-');
}
q = l/r;
if (q != 0)
mlputli(q, r);
mlout((int)(l%r)+'0');
++ttcol;
}
/*
* write out a scaled integer with two decimal places
*/
PASCAL NEAR mlputf(s)
int s; /* scaled integer to output */
{
int i; /* integer portion of number */
int f; /* fractional portion of number */
/* break it up */
i = s / 100;
f = s % 100;
/* send out the integer portion */
mlputi(i, 10);
mlout('.');
mlout((f / 10) + '0');
mlout((f % 10) + '0');
ttcol += 3;
}
#if RAINBOW
PASCAL NEAR putline(row, col, buf)
int row, col;
char buf[];
{
int n;
n = strlen(buf);
if (col + n - 1 > term.t_ncol)
n = term.t_ncol - col + 1;
Put_Data(row, col, n, buf);
}
#endif