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- #include "jam.h"
- /*
- * Assorted commands.
- * The file contains the command
- * processors for a large assortment of unrelated
- * commands. The only thing they have in common is
- * that they are all command processors.
- *
- * I mucked with this code to begin to support GNU-like
- * indenting for C code. It isn't done...
- *
- */
- #include "stdio.h"
- #include "def.h"
- #include "key.h"
-
- static BOOL rn_(performindent,(int n, LINE *lp));
-
- static BOOL usetab = TRUE; /* for performindent */
- static BOOL doCindent = FALSE;
-
- int CindentOn(f, n)
- int f, n;
- {
- #ifdef INDENTING
- doCindent = TRUE;
- #endif
- return (TRUE);
- }
- int CindentOff(f, n)
- int f, n;
- {
- #ifdef INDENTING
- doCindent = FALSE;
- #endif
- return (TRUE);
- }
- BOOL isCindent()
- {
- return (doCindent);
- }
-
- /* Work function to indent an existing line - doto must
- * be set correctly by caller, buffer is always curbp
- */
- static BOOL performindent(n, lp)
- int n;
- LINE *lp;
- {
- int i;
-
- if (!usetab || (curbp->b_flag & BFNOTAB))
- return(linsert(n, ' '));
-
- if ((i = n/TABSTOP) != 0)
- if (!linsert(i, '\t'))
- return(FALSE);
-
- if ((i = n%TABSTOP) != 0)
- return(linsert(i, ' '));
-
- return(TRUE);
- }
-
- /*
- * Display a bunch of useful information about
- * the current location of dot. The character under the
- * cursor (in octal), the current line, row, and column, and
- * approximate position of the cursor in the file (as a percentage)
- * is displayed. The column position assumes an infinite position
- * display; it does not truncate just because the screen does.
- * This is normally bound to "C-X =".
- */
- /*ARGSUSED*/
- showcpos(f, n)
- int f, n;
- {
- char buf[512];
-
- calccpos(buf, FALSE);
- ewprintf(buf);
- return(TRUE);
- }
-
- showline(f, n)
- int f, n;
- {
- char buf[512];
-
- calccpos(buf, TRUE);
- ewprintf(buf);
- return(TRUE);
- }
-
- /* do work of constructing cpos string - broken from showcpos (JAM)
- */
- void calccpos(buf, shortflg)
- char *buf;
- int shortflg;
- {
- register LINE *clp;
- register long nchar;
- long cchar;
- register int nline, row;
- int cline, cbyte; /* Current line/char/byte */
- int ratio;
- int cratio = '%';
-
- clp = lforw(curbp->b_linep); /* Collect the data. */
- nchar = 0;
- nline = 0;
- for (;;) {
- ++nline; /* Count this line */
- if (clp == curwp->w_dotp) {
- cline = nline; /* Mark line */
- cchar = nchar + curwp->w_doto;
- if (curwp->w_doto == llength(clp))
- cbyte = '\n';
- else
- cbyte = lgetc(clp, curwp->w_doto);
- }
- nchar += llength(clp); /* Now count the chars */
- clp = lforw(clp);
- if (clp == curbp->b_linep) break;
- nchar++; /* count the newline */
- }
- row = curwp->w_toprow + 1; /* Determine row. */
- clp = curwp->w_linep;
- while (clp!=curbp->b_linep && clp!=curwp->w_dotp) {
- ++row;
- clp = lforw(clp);
- }
- /*NOSTRICT*/
- ratio = (int)(nchar ? (100L*cchar) / nchar : 100);
- if (!shortflg)
- sprintf(buf,
- "Char: %c (0%o) point=%ld(%d%c) line=%d row=%d col=%d",
- cbyte, cbyte, cchar, ratio, cratio, cline, row, getcolpos());
- else
- sprintf(buf, "Line %d Col %d (%d%c)",
- cline, getcolpos(), ratio, cratio);
- }
-
- int getcolpos()
- {
- register int col, i, c;
-
- col = 1; /* Determine column. */
- for (i=0; i<curwp->w_doto; ++i) {
- c = lgetc(curwp->w_dotp, i);
- if (c == '\t')
- {
- col |= 0x07;
- ++col;
- } else if (ISCTRL(c) != FALSE)
- ++col;
- ++col;
- }
- return col;
- }
- /*
- * Twiddle the two characters on either side of
- * dot. If dot is at the end of the line twiddle the
- * two characters before it. Return with an error if dot
- * is at the beginning of line; it seems to be a bit
- * pointless to make this work. This fixes up a very
- * common typo with a single stroke. Normally bound
- * to "C-T". This always works within a line, so
- * "WFEDIT" is good enough.
- */
- /*ARGSUSED*/
- twiddle(f, n)
- int f, n;
- {
- register LINE *dotp;
- register int doto;
- register int cr;
-
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
- clearUndo(curbp);
- cacheTwiddle();
-
- dotp = curwp->w_dotp;
- doto = curwp->w_doto;
- if(doto==llength(dotp)) {
- if(--doto<=0) return FALSE;
- } else {
- if(doto==0)
- return FALSE;
- ++curwp->w_doto;
- }
- cr = lgetc(dotp, doto--);
- lchange(WFEDIT);
- changelineflag(dotp, TRUE);
- lputc(dotp, doto+1, lgetc(dotp, doto));
- lputc(dotp, doto, (char)cr);
- return TRUE;
- }
-
- /*
- * Open up some blank space. The basic plan
- * is to insert a bunch of newlines, and then back
- * up over them. Everything is done by the subcommand
- * procerssors. They even handle the looping. Normally
- * this is bound to "C-O".
- */
- /*ARGSUSED*/
- openline(f, n)
- int f, n;
- {
- register int i;
- register int s;
-
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
- clearUndo(curbp);
- cacheInsert((RSIZE)n);
-
- if (n < 0)
- return FALSE;
- if (n == 0)
- return TRUE;
- i = n; /* Insert newlines. */
- do {
- s = lnewline();
- } while (s==TRUE && --i);
- if (s == TRUE) /* Then back up overtop */
- s = backchar(f | FFRAND, n); /* of them all. */
- return s;
- }
-
- /*
- * Insert a newline.
- * If you are at the end of the line and the
- * next line is a blank line, just move into the
- * blank line. This makes "C-O" and "C-X C-O" work
- * nicely, and reduces the ammount of screen
- * update that has to be done. This would not be
- * as critical if screen update were a lot
- * more efficient.
- */
- /*ARGSUSED*/
- newline(f, n)
- int f, n;
- {
- register LINE *lp;
- register int s;
-
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
- clearUndo(curbp);
-
- if (n < 0) return FALSE;
- while (n--) {
- lp = curwp->w_dotp;
- if (llength(lp) == curwp->w_doto
- && lforw(lp) != curbp->b_linep
- && llength(lforw(lp)) == 0) {
- if ((s=forwchar(FFRAND, 1)) != TRUE)
- return s;
- } else if ((s=lnewline()) != TRUE)
- return s;
- }
- return TRUE;
- }
-
- /*
- * Delete blank lines around dot.
- * What this command does depends if dot is
- * sitting on a blank line. If dot is sitting on a
- * blank line, this command deletes all the blank lines
- * above and below the current line. If it is sitting
- * on a non blank line then it deletes all of the
- * blank lines after the line. Normally this command
- * is bound to "C-X C-O". Any argument is ignored.
- */
- /*ARGSUSED*/
- deblank(f, n)
- int f, n;
- {
- register LINE *lp1;
- register LINE *lp2;
- register RSIZE nld;
-
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
- clearUndo(curbp);
-
- lp1 = curwp->w_dotp;
- changelineflag(lp1, TRUE);
- while (llength(lp1)==0 && (lp2=lback(lp1))!=curbp->b_linep)
- lp1 = lp2;
- lp2 = lp1;
- nld = (RSIZE) 0;
- while ((lp2=lforw(lp2))!=curbp->b_linep && llength(lp2)==0)
- ++nld;
- if (nld == 0)
- return (TRUE);
- curwp->w_dotp = lforw(lp1);
- curwp->w_doto = 0;
- return ldelete((RSIZE)nld, KNONE);
- }
-
- /*
- * Delete any whitespace around dot, then insert a space.
- */
- justone(f, n)
- int f, n;
- {
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
- clearUndo(curbp);
-
- (VOID) delwhite(f, n);
- return linsert(1, ' ');
- }
- /*
- * Delete any whitespace around dot.
- */
- /*ARGSUSED*/
- delwhite(f, n)
- int f, n;
- {
- register int col, c, s;
-
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
- clearUndo(curbp);
-
- col = curwp->w_doto;
- while (((c = lgetc(curwp->w_dotp, col)) == ' ' || c == '\t')
- && col < llength(curwp->w_dotp))
- ++col;
-
- do {
- if (curwp->w_doto == 0) {
- s = FALSE;
- break;
- }
- if ((s = backchar(FFRAND, 1)) != TRUE)
- break;
- } while ((c = lgetc(curwp->w_dotp, curwp->w_doto)) == ' ' || c == '\t');
-
- if (s == TRUE)
- (VOID) forwchar(FFRAND, 1);
-
- (VOID) ldelete((RSIZE)(col - curwp->w_doto), KNONE);
- return TRUE;
- }
- /*
- * Insert a newline, then enough
- * tabs and spaces to duplicate the indentation
- * of the previous line. Assumes tabs are every eight
- * characters. Quite simple. Figure out the indentation
- * of the current line. Insert a newline by calling
- * the standard routine. Insert the indentation by
- * inserting the right number of tabs and spaces.
- * Return TRUE if all ok. Return FALSE if one
- * of the subcomands failed. Normally bound
- * to "C-J".
- */
- /*ARGSUSED*/
- indent(f, n)
- int f, n;
- {
- register int nicol;
-
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
- clearUndo(curbp);
-
-
- if (n < 0)
- return (FALSE);
- nicol = indentofline(n, curwp->w_dotp);
- if (lnewline() == FALSE)
- return(FALSE);
- return(performindent(nicol, curwp->w_dotp));
- }
-
- /*
- * Delete forward. This is real
- * easy, because the basic delete routine does
- * all of the work. Watches for negative arguments,
- * and does the right thing. If any argument is
- * present, it kills rather than deletes, to prevent
- * loss of text if typed with a big argument.
- * Normally bound to "C-D".
- */
- /*ARGSUSED*/
- forwdel(f, n)
- int f, n;
- {
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
-
- if (!(lastflag & CFKILL))
- {
- clearUndo(curbp);
- cacheKill();
- }
- if (n < 0)
- return backdel(f | FFRAND, -n);
- if (f & FFARG) { /* Really a kill. */
- if ((lastflag&CFKILL) == 0)
- kdelete();
- thisflag |= CFKILL;
- }
- return ldelete((RSIZE) n, (f & FFARG) ? KFORW : KNONE);
- }
-
- /*
- * Delete backwards. This is quite easy too,
- * because it's all done with other functions. Just
- * move the cursor back, and delete forwards.
- * Like delete forward, this actually does a kill
- * if presented with an argument.
- */
- /*ARGSUSED*/
- backdel(f, n)
- int f, n;
- {
- register int s;
-
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
- if (!(lastflag & CFKILL))
- {
- clearUndo(curbp);
- cacheKill();
- }
-
- if (n < 0)
- return forwdel(f | FFRAND, -n);
- if (f & FFARG) { /* Really a kill. */
- if ((lastflag&CFKILL) == 0)
- kdelete();
- thisflag |= CFKILL;
- }
- if ((s=backchar(f | FFRAND, n)) == TRUE)
- s = ldelete((RSIZE) n, (f & FFARG) ? KFORW : KNONE);
- return s;
- }
-
- /*
- * Kill line. If called without an argument,
- * it kills from dot to the end of the line, unless it
- * is at the end of the line, when it kills the newline.
- * If called with an argument of 0, it kills from the
- * start of the line to dot. If called with a positive
- * argument, it kills from dot forward over that number
- * of newlines. If called with a negative argument it
- * kills any text before dot on the current line,
- * then it kills back abs(arg) lines.
- */
- /*ARGSUSED*/
- killline(f, n)
- int f, n;
- {
- register RSIZE chunk;
- register LINE *nextp;
- register int i, c;
- VOID kdelete();
-
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
- if (!(lastflag & CFKILL))
- {
- clearUndo(curbp);
- cacheKill();
- }
-
- if ((lastflag&CFKILL) == 0) /* Clear kill buffer if */
- kdelete(); /* last wasn't a kill. */
- thisflag |= CFKILL;
- if (!(f & FFARG)) {
- for (i = curwp->w_doto; i < llength(curwp->w_dotp); ++i)
- if ((c = lgetc(curwp->w_dotp, i)) != ' ' && c != '\t')
- break;
- if (i == llength(curwp->w_dotp))
- chunk = llength(curwp->w_dotp)-curwp->w_doto + 1;
- else {
- chunk = llength(curwp->w_dotp)-curwp->w_doto;
- if (chunk == 0)
- chunk = 1;
- }
- } else if (n > 0) {
- chunk = llength(curwp->w_dotp)-curwp->w_doto+1;
- nextp = lforw(curwp->w_dotp);
- i = n;
- while (--i) {
- if (nextp == curbp->b_linep)
- break;
- chunk += llength(nextp)+1;
- nextp = lforw(nextp);
- }
- } else { /* n <= 0 */
- chunk = curwp->w_doto;
- curwp->w_doto = 0;
- i = n;
- while (i++) {
- if (lback(curwp->w_dotp) == curbp->b_linep)
- break;
- curwp->w_dotp = lback(curwp->w_dotp);
- curwp->w_flag |= WFMOVE;
- chunk += llength(curwp->w_dotp)+1;
- }
- }
- /*
- * KFORW here is a bug. Should be KBACK/KFORW, but we need to
- * rewrite the ldelete code (later)?
- */
- return (ldelete(chunk, KFORW));
- }
-
- /*
- * Yank text back from the kill buffer. This
- * is really easy. All of the work is done by the
- * standard insert routines. All you do is run the loop,
- * and check for errors. The blank
- * lines are inserted with a call to "newline"
- * instead of a call to "lnewline" so that the magic
- * stuff that happens when you type a carriage
- * return also happens when a carriage return is
- * yanked back from the kill buffer.
- * An attempt has been made to fix the cosmetic bug
- * associated with a yank when dot is on the top line of
- * the window (nothing moves, because all of the new
- * text landed off screen).
- */
- /*ARGSUSED*/
- yank(f, n)
- int f, n;
- {
- register int c;
- register int i;
- register LINE *lp;
- register int nline;
- VOID isetmark();
-
-
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return FALSE;
- }
- if (filetimechanged(curbp))
- return(FALSE);
- clearUndo(curbp);
- cacheInsert(return_kused());
-
- if (n < 0)
- return FALSE;
- nline = 0; /* Newline counting. */
- while (n--) {
- isetmark(); /* mark around last yank */
- i = 0;
- while ((c=kremove(i)) >= 0) {
- if (c == '\n') {
- if (newline(FFRAND, 1) == FALSE)
- return FALSE;
- ++nline;
- } else {
- if (linsert(1, c) == FALSE)
- return FALSE;
- }
- ++i;
- }
- }
- lp = curwp->w_linep; /* Cosmetic adjustment */
- if (curwp->w_dotp == lp) { /* if offscreen insert. */
- while (nline-- && lback(lp)!=curbp->b_linep)
- lp = lback(lp);
- curwp->w_linep = lp; /* Adjust framing. */
- curwp->w_flag |= WFHARD;
- }
- return TRUE;
- }
-
- RSIZE getlinenum(bp, lp)
- BUFFER *bp;
- LINE *lp;
- {
- register LINE *clp;
- register RSIZE nline = 0L;
-
- for (clp = lforw(bp->b_linep); clp; clp = lforw(clp))
- {
- ++nline; /* Count this line */
- if (clp == lp)
- return(nline);
- }
- return((RSIZE)0);
- }
- int getrownum(wp, lp)
- EWINDOW *wp;
- LINE *lp;
- {
- register LINE *clp;
- register int row;
-
- row = wp->w_toprow + 1; /* Determine row. */
- clp = wp->w_linep;
- while (clp != lp)
- {
- row++;
- clp = lforw(clp);
- if (clp == wp->w_bufp->b_linep) /* wrapped around, not visible */
- return(-1);
- }
- return(row);
- }
-
-
- int hardtab(f, n)
- int f, n;
- {
- ewprintf("Hard Tab");
- if (curbp->b_flag & BFNOTAB)
- return(linsert(4, ' '));
- else
- return(linsert(1, '\t'));
- }
- /* If active, all TAB keys converted to "indent this line
- * so it matches the indent of the last { or }." kinda like GNU
- * formatting features.
- *
- * Caller sets param 'n' to how many lines to do; 1 is default
- * and means do current line.
- */
- int alignindent(f, n)
- int f, n;
- {
- register int i;
- LINE *lp;
-
- if (curbp->b_flag & BFVIEW)
- {
- ttbeep();
- return (FALSE);
- }
-
- if (filetimechanged(curbp))
- return(FALSE);
- clearUndo(curbp);
-
- /* magic time - do something similar to regular old indent,
- * except watching for formatting chars..
- *
- * clear all whitespace away from beginning of line first
- */
- lp = curwp->w_dotp;
- for (i = 0; i < n; i++)
- {
- int num = indentthisline(lp);
- #ifdef INDENTING
- BOOL savetab = usetab;
- usetab = FALSE;
- curwp->w_doto = 0;
- delwhite(0, 1);
- usetab = savetab;
- #endif
- performindent(num, lp);
- lp = lforw(lp);
- if (lp = curbp->b_linep)
- break; /* wrap around */
- curwp->w_dotp = lp;
- }
-
- return (TRUE);
- }
-
-