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- /*
- * Program: Display functions
- *
- * Modifier: Michael Seibel
- * Networks and Distributed Computing
- * Computing & Communications
- * University of Washington
- * Administration Building, AG-44
- * Seattle, WA 98195
- * Internet: mikes@cac.washington.edu
- *
- * Date: 19 Jan 1991
- * Last Edited: 6 Jan 1992
- *
- * Copyright 1991 by the University of Washington
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appears in all copies and that both the
- * above copyright notice and this permission notice appear in supporting
- * documentation, and that the name of the University of Washington not be
- * used in advertising or publicity pertaining to distribution of the software
- * without specific, written prior permission. This software is made
- * available "as is", and
- * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
- * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
- * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
- * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
- * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
- /*
- * 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 "osdep.h"
- #include "estruct.h"
- #include "edef.h"
- #include "pico.h"
-
-
- #define WFDEBUG 0 /* Window flag debug. */
-
- typedef struct VIDEO {
- short v_flag; /* Flags */
- char v_text[1]; /* Screen data. */
- } VIDEO;
-
- #define VFCHG 0x0001 /* Changed flag */
- #define VFEXT 0x0002 /* extended (beyond column 80) */
- #define VFREV 0x0004 /* reverse video status */
- #define VFREQ 0x0008 /* reverse video request */
-
- 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 lbound = 0; /* leftmost column of current line
- being displayed */
-
- 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)();
-
- (*term.t_rev)(FALSE);
- vscreen = (VIDEO **) malloc((term.t_nrow+1)*sizeof(VIDEO *));
- if (vscreen == NULL){
- fprintf(stderr,"vtinit: vscreen: No Memory.\n");
- exit(1);
- }
-
-
- pscreen = (VIDEO **) malloc((term.t_nrow+1)*sizeof(VIDEO *));
- if (pscreen == NULL){
- fprintf(stderr, "vtinit: pscreen: No Memory.\n");
- exit(1);
- }
-
-
- for (i = 0; i <= term.t_nrow; ++i) {
- vp = (VIDEO *) malloc(sizeof(VIDEO)+term.t_ncol);
-
- if (vp == NULL){
- fprintf(stderr,"vtinit: vscreen[%d]: No Memory.\n", i);
- exit(1);
- }
-
- vp->v_flag = 0;
- vscreen[i] = vp;
- vp = (VIDEO *) malloc(sizeof(VIDEO)+term.t_ncol);
-
- if (vp == NULL){
- fprintf(stderr,"vtinit: pscreen[%d]: No Memory.\n", i);
- exit(1);
- }
-
- vp->v_flag = 0;
- pscreen[i] = vp;
- }
-
- }
-
-
- /*
- * 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()
- {
- movecursor(term.t_nrow-1, 0);
- peeol();
- movecursor(term.t_nrow, 0);
- peeol();
- (*term.t_close)();
- }
-
-
- /*
- * 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 "$" in the last column. This routine
- * only puts printing characters into the virtual terminal buffers. Only
- * column overflow is checked.
- */
- vtputc(c)
- int c;
- {
- register VIDEO *vp;
-
- vp = vscreen[vtrow];
-
- if (vtcol >= term.t_ncol) {
- vtcol = (vtcol + 0x07) & ~0x07;
- vp->v_text[term.t_ncol - 1] = '$';
- }
- else if (c == '\t') {
- do {
- vtputc(' ');
- }
- while ((vtcol&0x07) != 0);
- }
- else if (c < 0x20 || c == 0x7F) {
- vtputc('^');
- vtputc(c ^ 0x40);
- }
- else
- vp->v_text[vtcol++] = c;
- }
-
-
- /* put a character to the virtual screen in an extended line. If we are
- * not yet on left edge, don't print it yet. check for overflow on
- * the right margin.
- */
- vtpute(c)
- int c;
- {
- register VIDEO *vp;
-
- vp = vscreen[vtrow];
-
- if (vtcol >= term.t_ncol) {
- vtcol = (vtcol + 0x07) & ~0x07;
- vp->v_text[term.t_ncol - 1] = '$';
- }
- else if (c == '\t'){
- do {
- vtpute(' ');
- }
- while (((vtcol + lbound)&0x07) != 0 && vtcol < term.t_ncol);
- }
- else if (c < 0x20 || c == 0x7F) {
- vtpute('^');
- vtpute(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.
- */
- vteeol()
- {
- register VIDEO *vp;
-
- vp = vscreen[vtrow];
- while (vtcol < term.t_ncol)
- vp->v_text[vtcol++] = ' ';
- }
-
-
- /*
- * 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.
- */
- update()
- {
- register LINE *lp;
- register WINDOW *wp;
- register VIDEO *vp1;
- register VIDEO *vp2;
- register int i;
- register int j;
- register int c;
- register int scroll = 0;
-
- #if TYPEAH
- if (typahead())
- return(TRUE);
- #endif
-
- if(Pmaster == NULL){
- /* update the reverse video flags for any mode lines out there */
- for (i = 0; i < term.t_nrow; ++i)
- vscreen[i]->v_flag &= ~VFREQ;
-
- #if REVSTA
- wp = wheadp;
- while (wp != NULL) {
- vscreen[0]->v_flag |= VFREQ;
- wp = wp->w_wndp;
- }
- #endif /* REVSTA */
- }
-
- wp = wheadp;
-
- while (wp != NULL){
- /* Look at any window with update flags set on. */
-
- if (wp->w_flag != 0){
- /* If not force reframe, check the framing. */
-
- if ((wp->w_flag & WFFORCE) == 0){
- lp = wp->w_linep;
-
- for (i = 0; i < wp->w_ntrows; ++i){
- if (lp == wp->w_dotp)
- goto out;
-
- if (lp == wp->w_bufp->b_linep)
- break;
-
- lp = lforw(lp);
- }
- }
-
- /* Not acceptable, better 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){
- --i;
-
- if (i >= wp->w_ntrows)
- i = wp->w_ntrows-1;
- }
- else if (i < 0){
- i += wp->w_ntrows;
-
- if (i < 0)
- i = 0;
- }
- else if(optimize){
- /*
- * find dotp, if its been moved just above or below the
- * window, use tcapscrollx() to facilitate quick redisplay...
- */
- lp = lforw(wp->w_dotp);
- if(lp != wp->w_dotp){
- if(lp == wp->w_linep && lp != wp->w_bufp->b_linep){
- scroll = 1;
- }
- else {
- lp = wp->w_linep;
- for(j=0;j < wp->w_ntrows; ++j){
- if(lp != wp->w_bufp->b_linep)
- lp = lforw(lp);
- else
- break;
- }
- if(lp == wp->w_dotp && j == wp->w_ntrows)
- scroll = 2;
- }
- }
- j = i = wp->w_ntrows/2;
- }
- else
- i = wp->w_ntrows/2;
-
- lp = wp->w_dotp;
-
- while (i != 0 && lback(lp) != wp->w_bufp->b_linep){
- --i;
- lp = lback(lp);
- }
-
- /*
- * this is supposed to speed things up by using tcap sequences
- * to efficiently scroll the terminal screen. the thinking here
- * is that its much faster to update pscreen[] than to actually
- * write the stuff to the screen...
- */
- if(optimize){
- switch(scroll){
- case 1: /* scroll text down */
- j = j-i+1; /* add one for dot line */
- /*
- * do we scroll down the header as well? Well, only
- * if we're not editing the header, we've backed up
- * to the top, and the composer is not being
- * displayed...
- */
- if(Pmaster && !ComposerEditing
- && (lback(lp) == wp->w_bufp->b_linep)
- && (ComposerTopLine == COMPOSER_TOP_LINE))
- j += entry_line(LASTHDR, TRUE);
-
- scrolldown(wp, -1, j);
- break;
- case 2: /* scroll text up */
- j = wp->w_ntrows - (j-i); /* we chose new top line! */
- if(Pmaster && j){
- /*
- * do we scroll down the header as well? Well, only
- * if we're not editing the header, we've backed up
- * to the top, and the composer is not being
- * displayed...
- */
- if(!ComposerEditing
- && (ComposerTopLine != COMPOSER_TOP_LINE))
- scrollup(wp, COMPOSER_TOP_LINE,
- j+entry_line(LASTHDR, TRUE));
- else
- scrollup(wp, -1, j);
- }
- else
- scrollup(wp, -1, j);
- break;
- default :
- break;
- }
- }
-
- wp->w_linep = lp;
- wp->w_flag |= WFHARD; /* Force full. */
- out:
- /*
- * if the line at the top of the page is the top line
- * in the body, show the header...
- */
- if(Pmaster && !ComposerEditing){
- if(lback(wp->w_linep) == wp->w_bufp->b_linep){
- if(ComposerTopLine == COMPOSER_TOP_LINE){
- i = term.t_nrow - 4 - HeaderLen();
- if(i > 0 && nlforw() >= i) { /* room for header ? */
- if((i = nlforw()/2) == 0 && term.t_nrow&1)
- i = 1;
- while(wp->w_linep != wp->w_bufp->b_linep && i--)
- wp->w_linep = lforw(wp->w_linep);
-
- }
- else
- ToggleHeader(1);
- }
- }
- else{
- if(ComposerTopLine != COMPOSER_TOP_LINE)
- ToggleHeader(0); /* hide it ! */
- }
- }
-
- /* 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;
- i = wp->w_toprow;
-
- if ((wp->w_flag & ~WFMODE) == WFEDIT){
- while (lp != wp->w_dotp){
- ++i;
- lp = lforw(lp);
- }
-
- vscreen[i]->v_flag |= VFCHG;
- vtmove(i, 0);
-
- for (j = 0; j < llength(lp); ++j)
- vtputc(lgetc(lp, j));
-
- vteeol();
- }
- else if ((wp->w_flag & (WFEDIT | WFHARD)) != 0){
- while (i < wp->w_toprow+wp->w_ntrows){
- vscreen[i]->v_flag |= VFCHG;
- vtmove(i, 0);
-
- /* if line has been changed */
- if (lp != wp->w_bufp->b_linep){
- for (j = 0; j < llength(lp); ++j)
- vtputc(lgetc(lp, j));
-
- lp = lforw(lp);
- }
-
- vteeol();
- ++i;
- }
- }
- #if ~WFDEBUG
- if ((wp->w_flag&WFMODE) != 0)
- modeline(wp);
-
- wp->w_flag = 0;
- wp->w_force = 0;
- #endif
- }
- #if WFDEBUG
- modeline(wp);
- wp->w_flag = 0;
- wp->w_force = 0;
- #endif
-
- /* and onward to the next window */
- wp = wp->w_wndp;
- }
-
- /* 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);
- }
-
- curcol = 0;
- i = 0;
-
- while (i < curwp->w_doto){
- c = lgetc(lp, i++);
-
- if (c == '\t')
- curcol |= 0x07;
- else if (c < 0x20 || c == 0x7F)
- ++curcol;
-
- ++curcol;
- }
-
- if (curcol >= term.t_ncol - 1) { /* extended line. */
- /* flag we are extended and changed */
- vscreen[currow]->v_flag |= VFEXT | VFCHG;
- updext(); /* and output extended line */
- } else
- lbound = 0; /* not extended line */
-
- /* make sure no lines need to be de-extended because the cursor is
- * no longer on them
- */
-
- wp = wheadp;
-
- while (wp != NULL) {
- lp = wp->w_linep;
- i = wp->w_toprow;
-
- while (i < wp->w_toprow + wp->w_ntrows) {
- if (vscreen[i]->v_flag & VFEXT) {
- /* always flag extended lines as changed */
- vscreen[i]->v_flag |= VFCHG;
- if ((wp != curwp) || (lp != wp->w_dotp) ||
- (curcol < term.t_ncol - 1)) {
- vtmove(i, 0);
- for (j = 0; j < llength(lp); ++j)
- vtputc(lgetc(lp, j));
- vteeol();
-
- /* this line no longer is extended */
- vscreen[i]->v_flag &= ~VFEXT;
- }
- }
- lp = lforw(lp);
- ++i;
- }
- /* and onward to the next window */
- wp = wp->w_wndp;
- }
-
- /* 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 (sgarbf != FALSE){
- if(Pmaster){
- showCompTitle();
-
- if(ComposerTopLine != COMPOSER_TOP_LINE){
- UpdateHeader(); /* arrange things */
- PaintHeader(COMPOSER_TOP_LINE, TRUE);
- }
-
- /*
- * since we're using only a portion of the screen and only
- * one buffer, only clear enough screen for the current window
- * which is to say the *only* window.
- */
- for(i=wheadp->w_toprow;i<=term.t_nrow; i++){
- movecursor(i, 0);
- peeol();
- vscreen[i]->v_flag |= VFCHG;
- }
- movecursor(wheadp->w_toprow, 0);
- }
- else{
- for (i = 0; i < term.t_nrow - 2; ++i){
-
- vscreen[i]->v_flag |= VFCHG;
- vp1 = pscreen[i];
- for (j = 0; j < term.t_ncol; ++j)
- vp1->v_text[j] = ' ';
- }
- movecursor(0, 0); /* Erase the screen. */
- (*term.t_eeop)();
-
- }
- sgarbf = FALSE; /* Erase-page clears */
- mpresf = FALSE; /* the message area. */
-
- if(Pmaster)
- modeline(curwp);
- else
- sgarbk = TRUE; /* fix the keyhelp as well...*/
- }
-
- /* 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.
- */
- if(Pmaster){
- i = curwp->w_toprow;
- c = term.t_nrow-2;
- }
- else{
- i = 0;
- c = term.t_nrow;
- }
-
- for (; i < c; ++i){
-
- vp1 = vscreen[i];
-
- /* for each line that needs to be updated, or that needs its
- reverse video status changed, call the line updater */
- j = vp1->v_flag;
- if (((j & VFCHG) != 0) || (((j & VFREV) == 0) != ((j & VFREQ) == 0))){
-
- #if TYPEAH
- if (typahead())
- return(TRUE);
- #endif
- vp2 = pscreen[i];
-
- updateline(i, &vp1->v_text[0], &vp2->v_text[0], &vp1->v_flag);
-
- }
- }
-
- if(Pmaster == NULL){
-
- if(sgarbk != FALSE){
- movecursor(term.t_nrow-1, 0);
- peeol();
- movecursor(term.t_nrow, 0);
- peeol();
- if(lastflag&CFFILL){
- #ifdef SPELLER
- wkeyhelp("GORYKCXJWVUT",
- "Get Help,WriteOut,Read File,Prev Pg,Del Line,Cur Pos,Exit,Justify,Where is,Next Pg,UnJustify,To Spell");
-
- #else
- wkeyhelp("GORYKCXJWVUD",
- "Get Help,WriteOut,Read File,Prev Pg,Del Line,Cur Pos,Exit,Justify,Where is,Next Pg,UnJustify,Del Char");
-
- #endif
- emlwrite("Can now UnJustify!", NULL);
- mpresf = HUGE; /* remove this after next keystroke! */
- }
- else{
- #ifdef SPELLER
- wkeyhelp("GORYKCXJWVUT",
- "Get Help,WriteOut,Read File,Prev Pg,Del Line,Cur Pos,Exit,Justify,Where is,Next Pg,UnDel Line,To Spell");
- #else
- wkeyhelp("GORYKCXJWVUD",
- "Get Help,WriteOut,Read File,Prev Pg,Del Line,Cur Pos,Exit,Justify,Where is,Next Pg,UnDel Line,Del Char");
-
- #endif
- }
- sgarbk = FALSE;
- }
- }
-
- /* Finally, update the hardware cursor and flush out buffers. */
-
- movecursor(currow, curcol - lbound);
- (*term.t_flush)();
- }
-
- /* 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
- */
- 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;
-
- /* scan through the line outputing characters to the virtual screen
- * once we reach the left edge
- */
- vtmove(currow, -lbound); /* start scanning offscreen */
- lp = curwp->w_dotp; /* line to output */
- for (j=0; j<llength(lp); ++j) /* until the end-of-line */
- vtpute(lgetc(lp, j));
-
- /* truncate the virtual line */
- vteeol();
-
- /* 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. The
- * RAINBOW version of this routine uses fast video.
- */
- updateline(row, vline, pline, flags)
- char vline[]; /* what we want it to end up as */
- char pline[]; /* what it looks like now */
- short *flags; /* and how we want it that way */
- {
- register char *cp1;
- register char *cp2;
- register char *cp3;
- register char *cp4;
- register char *cp5;
- register char *cp6;
- register char *cp7;
- register int display = TRUE;
- register int nbflag; /* non-blanks to the right flag? */
- int rev; /* reverse video flag */
- int req; /* reverse video request flag */
-
-
- /* set up pointers to virtual and physical lines */
- cp1 = &vline[0];
- cp2 = &pline[0];
- cp3 = &vline[term.t_ncol];
-
- #if REVSTA
- /* if we need to change the reverse video status of the
- * current line, we need to re-write the entire line
- */
- rev = *flags & VFREV;
- req = *flags & VFREQ;
- if (rev != req) {
- movecursor(row, 0); /* Go to start of line. */
- (*term.t_rev)(req != FALSE); /* set rev video if needed */
-
- /* scan through the line and dump it to the screen and
- * the virtual screen array
- */
- while (cp1 < cp3) {
- (*term.t_putchar)(*cp1);
- ++ttcol;
- *cp2++ = *cp1++;
- }
- (*term.t_rev)(FALSE); /* turn rev video off */
-
- /* update the needed flags */
- *flags &= ~VFCHG;
- if (req)
- *flags |= VFREV;
- else
- *flags &= ~VFREV;
- return(TRUE);
- }
- #endif
-
- /* advance past any common chars at the left */
- 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 both lines are the same, no update needs to be done */
- if (cp1 == &vline[term.t_ncol]){
- *flags &= ~VFCHG; /* mark line clean! */
- return(TRUE);
- }
-
- /* find out if there is a match on the right */
- nbflag = FALSE;
- 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 && eolexist == TRUE) { /* 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. */
-
- if (!nbflag) { /* use insert or del char? */
- cp6 = cp3;
- cp7 = cp4;
-
- if(inschar && (cp7!=cp2 && cp6[0]==cp7[-1])){
- while (cp7!=cp2 && cp6[0]==cp7[-1]){
- --cp7;
- --cp6;
- }
-
- if (cp7==cp2 && cp4-cp2 > 3){
- o_insert(cp1[0]); /* insert the char */
- display = FALSE; /* only do it once!! */
- }
- }
- else if(delchar && cp3!=cp1 && cp7[0]==cp6[-1]){
- while (cp6!=cp1 && cp7[0]==cp6[-1]){
- --cp7;
- --cp6;
- }
-
- if (cp6==cp1 && cp5-cp6 > 3){
- o_delete(); /* insert the char */
- display = FALSE; /* only do it once!! */
- }
- }
- }
-
- while (cp1 != cp5) { /* Ordinary. */
- if(display)
- (*term.t_putchar)(*cp1);
- ++ttcol;
- *cp2++ = *cp1++;
- }
-
- if (cp5 != cp3) { /* Erase. */
- if(display)
- peeol();
- while (cp1 != cp3)
- *cp2++ = *cp1++;
- }
- *flags &= ~VFCHG; /* flag this line is changed */
- }
-
-
- /*
- * 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;
- {
- if(Pmaster){
- char keys[13], labels[160];
-
- if(ComposerEditing)
- ShowPrompt();
- else{
- sprintf(keys, "GCRYKOXJ%cVUT",
- (Pmaster->alt_ed != NULL) ? '_' : 'W');
- sprintf(labels, "Get Help,Cancel,Read File,Prev Pg,Del Line,Postpone,Send,Justify,%s,Next Pg,%s,To Spell",
- (Pmaster->alt_ed) ? "Alt Edit" : "Where is",
- (thisflag&CFFILL) ? "UnFill" : "UnDel Line");
- wkeyhelp(keys, labels);
- }
-
- return;
- }
- else{
- register char *cp;
- register int c;
- register int n; /* cursor position count */
- register BUFFER *bp;
- register i; /* loop index */
- register lchar; /* character to draw line in buffer with */
- register firstm; /* is this the first mode? */
- char tline[NLINE]; /* buffer for part of mode line */
-
- n = 0;
- #if MSDOS
- vtmove(1, 0);
- vteeol();
- #endif
- vscreen[n]->v_flag |= VFCHG; /* Redraw next time. */
- vtmove(n, 0); /* Seek to right line. */
-
- #if REVSTA
- if (revexist)
- lchar = ' ';
- else
- #endif
- lchar = '-';
-
- vtputc(lchar);
- bp = wp->w_bufp;
-
- n = 1;
-
- sprintf((cp=tline), " PICO %s ", version); /* VERSION */
-
- while ((c = *cp++) != 0) {
- vtputc(c);
- ++n;
- }
-
- if (bp->b_fname[0] != 0){ /* File name. */
- sprintf(tline," File: ");
- cp = &bp->b_fname[0];
-
- if(strlen(cp) > (term.t_ncol-n-22)){ /* room for full path ? */
- strcat(tline,".../");
- while(strlen(cp) > (term.t_ncol-n-22)){
- if(strchr(cp,'/') == NULL)
- cp = (char *)strchr(&bp->b_fname[0],'\0')-term.t_ncol-n-22;
- else
- cp = (char *)strchr(cp,'/') + 1;
- }
- }
-
- strcat(tline,cp);
-
- for(i=((term.t_ncol-n-12-strlen(tline))/2); i > 0; n++, i--)
- vtputc(' ');
-
- cp = &tline[0];
-
- while ((c = *cp++) != 0){
- vtputc(c);
- ++n;
- }
-
- }
- else{
- cp = " New Buffer ";
- for(i=(term.t_ncol-strlen(cp))/2; n < i; n++)
- vtputc(lchar);
- while ((c = *cp++) != 0) {
- vtputc(c);
- ++n;
- }
- }
-
- #if WFDEBUG
- vtputc(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);
- n += 6;
- #endif
-
- if ((bp->b_flag&BFCHG) != 0) /* "MOD" if changed. */
- cp = "Modified ";
- else
- cp = " ";
-
- while (n < (term.t_ncol - strlen(cp))){ /* Pad to full width. */
- vtputc(lchar);
- ++n;
- }
-
- while ((c = *cp++) != 0){
- vtputc(c);
- ++n;
- }
- }
- }
-
-
-
- /*
- * 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;
-
- movecursor(term.t_nrow - 2, 0);
- if (eolexist == TRUE)
- peeol();
- else {
- for (i = 0; i < term.t_ncol - 1; i++)
- (*term.t_putchar)(' ');
- movecursor(term.t_nrow, 1); /* force the move! */
- movecursor(term.t_nrow, 0);
- }
- (*term.t_flush)();
- 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. if d >= 0, d is the default answer returned. Otherwise there
- * is no default.
- */
- mlyesno(prompt, dflt)
- char *prompt;
- int dflt;
- {
- int c; /* input character */
-
- if(dflt >= 0)
- sprintf(s, "%s? [%c] : ", prompt, (dflt) ? 'y' : 'n');
- else
- sprintf(s, "%s (y/n)? ", prompt);
-
- while(1){
- mlwrite(s);
-
- (*term.t_rev)(1);
- while((c = GetKey()) == NODATA)
- ; /* don't repaint if timeout */
- (*term.t_rev)(0);
-
- if(dflt >= 0 && c == (CTRL|'M')){
- (*term.t_rev)(1);
- pputs((dflt) ? "Yes" : "No");
- (*term.t_rev)(0);
- return(dflt);
- }
-
- if (c == (CTRL|'C') || c == F3){ /* Bail out! */
- (*term.t_rev)(1);
- pputs("ABORT");
- (*term.t_rev)(0);
- return(ABORT);
- }
-
- if (c=='y' || c=='Y'){
- (*term.t_rev)(1);
- pputs("Yes");
- (*term.t_rev)(0);
- return(TRUE);
- }
-
- if (c=='n' || c=='N'){
- (*term.t_rev)(1);
- pputs("No");
- (*term.t_rev)(0);
- return(FALSE);
- }
- else
- (*term.t_beep)();
- }
- }
-
-
-
- /*
- * 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
- * macro throw the prompt away, and return the remembered response. This
- * lets macros run at full speed. The reply is always terminated by a carriage
- * return. Handle erase, kill, and abort keys.
- */
- mlreply(prompt, buf, nbuf, flg)
- char *prompt;
- char *buf;
- short flg;
- {
- return(mlreplyd(prompt, buf, nbuf, flg|QDEFLT));
- }
-
-
- /*
- * function key mappings
- */
- static int rfkm[12][2] = {
- { F1, (CTRL|'G')},
- { F2, 0 },
- { F3, (CTRL|'C')},
- { F4, (CTRL|'T')},
- { F5, 0 },
- { F6, 0 },
- { F7, 0 },
- { F8, 0 },
- { F9, 0 },
- { F10, 0 },
- { F11, 0 },
- { F12, 0 }
- };
-
-
- /*
- * mlreplyd - write the prompt to the message line along with an default
- * answer already typed in. Carraige return accepts the
- * default. answer returned in buf which also holds the initial
- * default, nbuf is it's length, def set means use default value,
- * and ff means for-file which checks that all chars are allowed
- * in file names.
- */
- mlreplyd(prompt, buf, nbuf, flg)
- char *prompt;
- char *buf;
- int nbuf;
- short flg;
- {
- register int c; /* current char */
- register char *b; /* pointer in buf */
- register int i;
- register int maxl;
- register int plen;
- int bc;
- int changed = FALSE;
-
- mlwrite(prompt);
- plen = strlen(prompt);
- if(!(flg&QDEFLT))
- *buf = '\0';
-
- (*term.t_rev)(1);
-
- maxl = (nbuf < term.t_ncol - plen - 1) ? nbuf : term.t_ncol - plen - 1;
-
- pputs(buf);
- b = &buf[strlen(buf)];
-
- for (;;) {
- movecursor(ttrow, plen+b-buf);
- (*term.t_flush)();
-
-
- while((c = GetKey()) == NODATA)
- ;
-
- switch(normal(c, rfkm, 2)){
- case (CTRL|'A') : /* CTRL-A beginning */
- b = buf;
- continue;
-
- case (CTRL|'B') : /* CTRL-B back a char */
- if(ttcol > plen)
- b--;
- continue;
-
- case (CTRL|'C') : /* CTRL-C abort */
- pputs("^C");
- ctrlg(FALSE, 0);
- (*term.t_rev)(0);
- (*term.t_flush)();
- return(ABORT);
-
- case (CTRL|'E') : /* CTRL-E end of line */
- b = &buf[strlen(buf)];
- continue;
-
- case (CTRL|'F') : /* CTRL-F forward a char*/
- if(*b != '\0')
- b++;
- continue;
-
- case (CTRL|'G') : /* CTRL-G help */
- pputs("HELP");
- (*term.t_rev)(0);
- (*term.t_flush)();
- return(HELPCH);
-
- case (CTRL|'H') : /* CTRL-H backspace */
- case 0x7f : /* rubout */
- if (b <= buf)
- break;
- b--;
- ttcol--; /* cheating! no pputc */
- (*term.t_putchar)('\b');
-
- case (CTRL|'D') : /* CTRL-D delete char */
- changed=TRUE;
- i = 0;
- do /* blat out left char */
- b[i] = b[i+1];
- while(b[i++] != '\0');
- break;
-
- case (CTRL|'L') : /* CTRL-L redraw */
- (*term.t_rev)(0);
- return(CTRL|'L');
-
- case (CTRL|'T') : /* CTRL-T special */
- (*term.t_rev)(0);
- return(CTRL|'T');
-
- case (CTRL|'K') : /* CTRL-K kill line */
- changed=TRUE;
- buf[0] = '\0';
- b = buf;
- movecursor(ttrow, plen);
- break;
-
- case K_PAD_LEFT:
- if(ttcol > plen)
- b--;
- continue;
-
- case K_PAD_RIGHT:
- if(*b != '\0')
- b++;
- continue;
-
- case F3 : /* abort */
- pputs("ABORT");
- ctrlg(FALSE, 0);
- (*term.t_rev)(0);
- (*term.t_flush)();
- return(ABORT);
-
- case F1 : /* sort of same thing */
- (*term.t_rev)(0);
- (*term.t_flush)();
- return(HELPCH);
-
- case (CTRL|'M') : /* newline */
- (*term.t_rev)(0);
- (*term.t_flush)();
- return(changed);
-
- default :
- if(strlen(buf) >= maxl){ /* contain the text */
- (*term.t_beep)();
- continue;
- }
- changed=TRUE;
-
- if(c&(~0xff)){ /* bag ctrl/special chars */
- (*term.t_beep)();
- }
- else{
- i = strlen(b);
- if(flg&QFFILE){
- if(!fallowc(c)){ /* c OK in filename? */
- (*term.t_beep)();
- continue;
- }
- }
- do /* blat out left char */
- b[i+1] = b[i];
- while(i-- >= 0);
- *b++ = c;
- pputc(c);
- }
- }
-
- pputs(b); /* show default */
- i = term.t_ncol-1;
- while(pscreen[ttrow]->v_text[i] == ' ')
- i--;
- while(ttcol <= i)
- pputc(' ');
- }
- }
-
-
- /*
- * emlwrite() - write the message string to the error half of the screen
- * center justified. much like mlwrite (which is still used
- * to paint the line for prompts and such), except it center
- * the text.
- */
- emlwrite(message, arg)
- char *message;
- void *arg;
- {
- register char *bufp = message;
- register char *ap;
- register long l;
-
- mlerase();
-
- if((l = strlen(message)) == 0) /* nothing to write, bag it */
- return;
-
- /*
- * next, figure out where the to move the cursor so the message
- * comes out centered
- */
- if((ap=(char *)strchr(message, '%')) != NULL){
- l -= 2;
- switch(ap[1]){
- case '%':
- case 'c':
- l += 1;
- break;
- case 'd':
- l += (long)dumbroot((int)arg, 10);
- break;
- case 'D':
- l += (long)dumblroot((long)arg, 10);
- break;
- case 'o':
- l += (long)dumbroot((int)arg, 8);
- break;
- case 'x':
- l += (long)dumbroot((int)arg, 16);
- break;
- case 's':
- l += strlen((char *)arg);
- break;
- }
- }
-
- if(l-4 <= term.t_ncol) /* this wouldn't be good */
- movecursor(term.t_nrow-2, (term.t_ncol - l - 4)/2);
- else
- movecursor(term.t_nrow-2, 0);
-
- (*term.t_rev)(1);
- pputs("[ ");
- while (*bufp != '\0' && ttcol < term.t_ncol-2){
- if(*bufp == '\007')
- (*term.t_beep)();
- else if(*bufp == '%'){
- switch(*++bufp){
- case 'c':
- pputc((char)arg);
- break;
- case 'd':
- mlputi((int)arg, 10);
- break;
- case 'D':
- mlputli((long)arg, 10);
- break;
- case 'o':
- mlputi((int)arg, 16);
- break;
- case 'x':
- mlputi((int)arg, 8);
- break;
- case 's':
- pputs((char *)arg);
- break;
- case '%':
- default:
- pputc(*bufp);
- break;
- }
- }
- else
- pputc(*bufp);
- bufp++;
- }
-
- pputs(" ]");
- (*term.t_rev)(0);
- (*term.t_flush)();
- mpresf = TRUE;
- }
-
-
- /*
- * 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. Set the "message line" flag TRUE.
- */
- mlwrite(fmt, arg)
- char *fmt;
- void *arg;
- {
- register int c;
- register char *ap;
-
- /*
- * the idea is to only highlight if there is something to show
- */
- mlerase();
-
- ttcol = 0;
- (*term.t_rev)(1);
- ap = (char *) &arg;
- while ((c = *fmt++) != 0) {
- if (c != '%') {
- (*term.t_putchar)(c);
- ++ttcol;
- }
- else {
- c = *fmt++;
- switch (c) {
- case 'd':
- mlputi(*(int *)ap, 10);
- ap += sizeof(int);
- break;
-
- case 'o':
- mlputi(*(int *)ap, 8);
- ap += sizeof(int);
- break;
-
- case 'x':
- mlputi(*(int *)ap, 16);
- ap += sizeof(int);
- break;
-
- case 'D':
- mlputli(*(long *)ap, 10);
- ap += sizeof(long);
- break;
-
- case 's':
- mlputs(*(char **)ap);
- ap += sizeof(char *);
- break;
-
- default:
- (*term.t_putchar)(c);
- ++ttcol;
- }
- }
- }
-
- c = ttcol;
- while(ttcol < term.t_ncol)
- pputc(' ');
-
- movecursor(term.t_nrow - 2, c);
- (*term.t_rev)(0);
- (*term.t_flush)();
- mpresf = TRUE;
- }
-
-
- /*
- * 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.
- */
- mlputs(s)
- char *s;
- {
- register int c;
-
- while ((c = *s++) != 0){
- (*term.t_putchar)(c);
- ++ttcol;
- }
- }
-
-
- /*
- * Write out an integer, in the specified radix. Update the physical cursor
- * position. This will not handle any negative numbers; maybe it should.
- */
- mlputi(i, r)
- {
- register int q;
- static char hexdigits[] = "0123456789ABCDEF";
-
- if (i < 0){
- i = -i;
- (*term.t_putchar)('-');
- }
-
- q = i/r;
-
- if (q != 0)
- mlputi(q, r);
-
- (*term.t_putchar)(hexdigits[i%r]);
- ++ttcol;
- }
-
-
- /*
- * do the same except as a long integer.
- */
- mlputli(l, r)
- long l;
- {
- register long q;
-
- if (l < 0){
- l = -l;
- (*term.t_putchar)('-');
- }
-
- q = l/r;
-
- if (q != 0)
- mlputli(q, r);
-
- (*term.t_putchar)((int)(l%r)+'0');
- ++ttcol;
- }
-
-
- /*
- * scrolldown - use stuff to efficiently move blocks of text on the
- * display, and update the pscreen array to reflect those
- * moves...
- *
- * wp is the window to move in
- * r is the row at which to begin scrolling
- * n is the number of lines to scrol
- */
- scrolldown(wp, r, n)
- WINDOW *wp;
- {
- #ifdef TERMCAP
- register int i;
- register int l;
- register VIDEO *vp1;
- register VIDEO *vp2;
-
- if(!n)
- return;
-
- if(r < 0){
- r = wp->w_toprow;
- l = wp->w_ntrows;
- }
- else{
- if(r > wp->w_toprow)
- vscreen[r-1]->v_flag |= VFCHG;
- l = wp->w_toprow+wp->w_ntrows-r;
- }
-
- tcapscrolldn(r, n);
-
- for(i=l-n-1; i >= 0; i--){
- vp1 = pscreen[r+i];
- vp2 = pscreen[r+i+n];
- bcopy(vp1, vp2, term.t_ncol);
- }
- pprints(r+n-1, r, 1);
- ttrow = HUGE;
- ttcol = HUGE;
- #endif /* TERMCAP */
- }
-
-
- /*
- * scrollup - use tcap stuff to efficiently move blocks of text on the
- * display, and update the pscreen array to reflect those
- * moves...
- */
- scrollup(wp, r, n)
- WINDOW *wp;
- {
- #ifdef TERMCAP
- register int i,j;
- register VIDEO *vp1;
- register VIDEO *vp2;
-
- if(!n)
- return;
-
- if(r < 0)
- r = wp->w_toprow;
-
- tcapscrollup(r, n);
-
- i = 0;
- while(1){
- if(Pmaster){
- if(!(r+i+n < wp->w_toprow+wp->w_ntrows))
- break;
- }
- else{
- if(!((i < wp->w_ntrows-n)&&(r+i+n < wp->w_toprow+wp->w_ntrows)))
- break;
- }
- vp1 = pscreen[r+i+n];
- vp2 = pscreen[r+i];
- bcopy(vp1, vp2, term.t_ncol);
- i++;
- }
- pprints(wp->w_toprow+wp->w_ntrows-n, wp->w_toprow+wp->w_ntrows-1, 1);
- ttrow = HUGE;
- ttcol = HUGE;
- #endif /* TERMCAP */
- }
-
-
- /*
- * print spaces in the physical screen starting from row abs(n) working in
- * either the positive or negative direction (depending on sign of n).
- */
- pprints(x, y)
- {
- register int i;
- register int j;
-
- if(x < y){
- for(i = x;i <= y; ++i){
- for(j = 0; j < term.t_ncol; j++)
- pscreen[i]->v_text[j] = ' ';
- }
- }
- else{
- for(i = x;i >= y; --i){
- for(j = 0; j < term.t_ncol; j++)
- pscreen[i]->v_text[j] = ' ';
- }
- }
- ttrow = y;
- ttcol = 0;
- }
-
-
-
- /*
- * doton - return the physical line number that the dot is on in the
- * current window, and by side effect the number of lines remaining
- */
- doton(r, chs)
- int *r;
- unsigned *chs;
- {
- register int i = 0;
- register LINE *lp = curwp->w_linep;
- int l = -1;
-
- *chs = 0;
- while(i++ < curwp->w_ntrows){
- if(lp == curwp->w_dotp)
- l = i-1;
- lp = lforw(lp);
- if(lp == curwp->w_bufp->b_linep){
- i++;
- break;
- }
- if(l >= 0)
- (*chs) += llength(lp);
- }
- *r = i-l-2;
- return(l+curwp->w_toprow);
- }
-
-
-
- /*
- * resize_pico - given new window dimensions, allocate new resources
- */
- resize_pico(row, col)
- int row, col;
- {
- int old_nrow, old_ncol;
- register int i;
- register VIDEO *vp;
-
- old_nrow = term.t_nrow;
- old_ncol = term.t_ncol;
-
- term.t_nrow = row;
- term.t_ncol = col;
-
- if (old_ncol == term.t_ncol && old_nrow == term.t_nrow)
- return;
-
- curwp->w_toprow = 2;
- curwp->w_ntrows = term.t_nrow-4; /* "-4" for mode line and keys */
-
- if(Pmaster)
- fillcol = (term.t_ncol > 80) ? 80 : term.t_ncol - 6;
- else
- fillcol = term.t_ncol - 6; /* we control the fill column */
-
- /*
- * free unused screen space ...
- */
- for(i=term.t_nrow+1; i <= old_nrow; ++i){
- free((char *) vscreen[i]);
- free((char *) pscreen[i]);
- }
-
- /*
- * realloc new space for screen ...
- */
- if((vscreen=(VIDEO **)realloc(vscreen,(term.t_nrow+1)*sizeof(VIDEO *))) == NULL){
- if(Pmaster)
- return(-1);
- else
- exit(1);
- }
-
- if((pscreen=(VIDEO **)realloc(pscreen,(term.t_nrow+1)*sizeof(VIDEO *))) == NULL){
- if(Pmaster)
- return(-1);
- else
- exit(1);
- }
-
- for (i = 0; i <= term.t_nrow; ++i) {
- if(i <= old_nrow)
- vp = (VIDEO *) realloc(vscreen[i], sizeof(VIDEO)+term.t_ncol);
- else
- vp = (VIDEO *) malloc(sizeof(VIDEO)+term.t_ncol);
-
- if (vp == NULL)
- exit(1);
- vp->v_flag = VFCHG;
- vscreen[i] = vp;
- if(old_ncol < term.t_ncol){ /* don't let any garbage in */
- vtrow = i;
- vtcol = (i < old_nrow) ? old_ncol : 0;
- vteeol();
- }
-
- if(i <= old_nrow)
- vp = (VIDEO *) realloc(pscreen[i], sizeof(VIDEO)+term.t_ncol);
- else
- vp = (VIDEO *) malloc(sizeof(VIDEO)+term.t_ncol);
-
- if (vp == NULL)
- exit(1);
-
- vp->v_flag = VFCHG;
- pscreen[i] = vp;
- }
-
- if(!ResizeBrowser()){
- if(Pmaster){
- ResizeHeader();
- }
- else{
- lchange(WFHARD); /* set update flags... */
- curwp->w_flag |= WFMODE; /* and modeline so we */
- refresh(0, 1); /* redraw the whole enchilada. */
- update(); /* do it */
- }
- }
-
- return(TRUE);
- }
-
-
- /*
- * showCompTitle - display the anchor line passed in from pine
- */
- showCompTitle()
- {
- if(Pmaster){
- register char *bufp = Pmaster->pine_anchor;
- movecursor(COMPOSER_TITLE_LINE, 0);
- (*term.t_rev)(1);
- while (ttcol < term.t_ncol)
- if(*bufp != '\0')
- pputc(*bufp++, 1);
- else
- pputc(' ', 1);
-
- (*term.t_rev)(0);
- movecursor(COMPOSER_TITLE_LINE + 1, 0);
- peeol();
- }
- }
-
-
-
- /*
- * zotdisplay - blast malloc'd space created for display maps
- */
- zotdisplay()
- {
- register int i;
-
- for (i = 0; i <= term.t_nrow; ++i){ /* free screens */
- free((char *) vscreen[i]);
- free((char *) pscreen[i]);
- }
-
- free((char *) vscreen);
- free((char *) pscreen);
- }
-
-
-
- /*
- * nlforw() - returns the number of lines from the top to the dot
- */
- nlforw()
- {
- register int i = 0;
- register LINE *lp = curwp->w_linep;
-
- while(lp != curwp->w_dotp){
- lp = lforw(lp);
- i++;
- }
- return(i);
- }
-
-
-
- /*
- * pputc - output the given char, keep track of it on the physical screen
- * array, and keep track of the cursor
- */
- pputc(c)
- int c;
- {
- if((ttcol >= 0 && ttcol < term.t_ncol)
- && (ttrow >= 0 && ttrow <= term.t_nrow)){
- (*term.t_putchar)(c); /* write it */
- pscreen[ttrow]->v_text[ttcol++] = c; /* keep track of it */
- }
- }
-
-
- /*
- * pputs - print a string and keep track of the cursor
- */
- pputs(s)
- register char *s;
- {
- while (*s != '\0')
- pputc(*s++);
- }
-
-
- /*
- * peeol - physical screen array erase to end of the line. remember to
- * track the cursor.
- */
- peeol()
- {
- register int r = ttrow;
- register int c = ttcol;
-
- (*term.t_eeol)();
- while(c < term.t_ncol && c >= 0 && r <= term.t_nrow && r >= 0)
- pscreen[r]->v_text[c++] = ' ';
- }
-
-
- /*
- * pscr - return the character on the physical screen map on the
- * given line, l, and offset, o.
- */
- pscr(l, o)
- {
- if((l >= 0 && l <= term.t_nrow) && (o >= 0 && o < term.t_ncol))
- return(pscreen[l]->v_text[o]);
- else
- return('\0');
- }
-
-
- /*
- * pclear() - clear the physical screen from row x through row y
- */
- pclear(x, y)
- register int x;
- register int y;
- {
- register int i;
-
- for(i=x; i < y; i++){
- movecursor(i, 0);
- peeol();
- }
- }
-
-
- /*
- * dumbroot - just get close
- */
- dumbroot(x, b)
- int x, b;
- {
- if(x < b)
- return(1);
- else
- return(dumbroot(x/b, b) + 1);
- }
-
-
- /*
- * dumblroot - just get close
- */
- dumblroot(x, b)
- long x;
- int b;
- {
- if(x < b)
- return(1);
- else
- return(dumblroot(x/b, b) + 1);
- }
-
-
- /*
- * pinsertc - use optimized insert, fixing physical screen map.
- * returns true if char written, false otherwise
- */
- pinsert(c)
- int c;
- {
- register int i;
- register char *p;
-
- if(o_insert(c)){ /* if we've got it, use it! */
- p = pscreen[ttrow]->v_text; /* then clean up physical screen */
- for(i = term.t_ncol-1; i > ttcol; i--)
- p[i] = p[i-1]; /* shift right */
- p[ttcol++] = c; /* insert new char */
-
- return(1);
- }
-
- return(0);
- }
-
-
- /*
- * pdel - use optimized delete to rub out the current char and
- * fix the physical screen array.
- * returns true if optimized the delete, false otherwise
- */
- pdel()
- {
- register int i;
- register char *c;
-
- if(delchar){ /* if we've got it, use it! */
- (*term.t_putchar)('\b'); /* move left a char */
- --ttcol;
- o_delete(); /* and delete it */
-
- c = pscreen[ttrow]->v_text; /* then clean up physical screen */
- for(i=ttcol; i < term.t_ncol; i++)
- c[i] = c[i+1];
- c[i] = ' ';
-
- return(1);
- }
-
- return(0);
- }
-
-
-
- /*
- * wstripe - write out the given string at the given location, and reverse
- * video on flagged characters. Does the same thing as pine's
- * stripe.
- */
- wstripe(line, column, pmt, key)
- int line, column;
- char *pmt, key;
- {
- register char *buf;
- register int i = 0;
- register int j = 0;
- register int l;
-
- l = strlen(pmt);
- while(1){
- if(i >= term.t_ncol || j >= l)
- return; /* equal strings */
-
- if(pmt[j] == key)
- j++;
-
- if(pscr(line, i) != pmt[j]){
- if(j >= 1 && pmt[j-1] == key)
- j--;
- break;
- }
-
- j++;
- i++;
- }
-
- movecursor(line, column+i);
- buf = &pmt[j];
- do{
- if(*buf == key){
- buf++;
- (*term.t_rev)(1);
- pputc(*buf);
- (*term.t_rev)(0);
- }
- else{
- pputc(*buf);
- }
- }
- while(*++buf != '\0');
- peeol();
- (*term.t_flush)();
- }
-
-
-
- /*
- * wkeyhelp - paint list of possible commands on the bottom
- * of the display (yet another pine clone)
- */
- wkeyhelp(keys, helptxt)
- char *keys;
- char *helptxt;
- {
- char *obufp, *ibufp = helptxt, *kbufp = HelpKeyNames, *startp;
- int i, j, spaces, index, copy;
-
- /*
- * make hardware cursor position change known!!
- */
- spaces = (term.t_ncol-3)/6;
- for(i=1;i>=0;i--){
- *s = '\0';
- obufp = &s[strlen(s)];
- for(j=1;j<=6;j++){
- index = j + (6*(1 - i));
- copy = keys[index-1] - '0';
- if(kbufp != NULL){
- do{
- if((*kbufp == '~') && (!copy))
- kbufp++;
- if(copy)
- *obufp++ = *kbufp++;
- else{
- *obufp++ = ' ';
- kbufp++;
- }
- }
- while((*kbufp != ',')? 1 : !(kbufp++));
- }
- else{
- if(copy){
- *obufp++ = '~';
- *obufp++ = '^';
- *obufp++ = '~';
- *obufp++ = copy + '0';
- }
- else{
- *obufp++ = ' ';
- *obufp++ = ' ';
- }
- }
-
- *obufp++ = ' ';
- startp = obufp;
- /*
- * we use "spaces-3" because of length key names
- */
- while(obufp - startp < (spaces-3)) {
- if((copy) && ((*ibufp != '\0') && (*ibufp != ',')))
- *obufp++ = *ibufp++;
- else
- *obufp++ = ' ';
- }
- if(copy){
- while((*ibufp != ',') && (*ibufp != '\0'))
- ibufp++;
- if(*ibufp != '\0')
- ibufp++;
- }
- *obufp = '\0';
- }
- wstripe(term.t_nrow-i,0,s,'~');
- }
- }
-
-