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- /*
- * This file contains the command processing functions for a number of random
- * commands. There is no functional grouping here, for sure.
- */
-
- #include "ed.h"
- #include "osbind.h" /* ST */
-
- int tabsize; /* Tab size (0: use real tabs) */
-
- /*
- * Set fill column to n.
- */
- setfillcol(f, n)
- {
- fillcol = n;
- return(TRUE);
- }
-
- /*
- * Display the current position of the cursor, in origin 1 X-Y coordinates,
- * the character that is under the cursor (in octal), and the fraction of the
- * text that is before the cursor. The displayed column is not the current
- * column, but the column that would be used on an infinite width display.
- * Normally this is bound to "C-X =".
- */
- showcpos(f, n)
- {
- register LINE *clp;
- register long nch;
- register int cbo;
- register long nbc;
- register int cac;
- register int ratio;
- register int col;
- register int i;
- register int c;
-
- clp = lforw(curbp->b_linep); /* Grovel the data. */
- cbo = 0;
- nch = 0;
- for (;;) {
- if (clp==curwp->w_dotp && cbo==curwp->w_doto) {
- nbc = nch;
- if (cbo == llength(clp))
- cac = '\n';
- else
- cac = lgetc(clp, cbo);
- }
- if (cbo == llength(clp)) {
- if (clp == curbp->b_linep)
- break;
- clp = lforw(clp);
- cbo = 0;
- } else
- ++cbo;
- ++nch;
- }
- col = getccol(FALSE); /* Get real column. */
- ratio = 0; /* Ratio before dot. */
- if (nch != 0)
- ratio = (100L*nbc) / nch;
- mlwrite("X=%d Y=%d CH=0x%x .=%D (%d%% of %D)",
- col+1, currow+1, cac, nbc, ratio, nch);
- return (TRUE);
- }
-
- /*
- * Return current column. Stop at first non-blank given TRUE argument.
- */
- getccol(bflg)
- int bflg;
- {
- register int c, i, col;
- col = 0;
- for (i=0; i<curwp->w_doto; ++i) {
- c = lgetc(curwp->w_dotp, i);
- if (c!=' ' && c!='\t' && bflg)
- break;
- if (c == '\t')
- col |= 0x07;
- else if (c<0x20 || c==0x7F)
- ++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.
- */
- twiddle(f, n)
- {
- register LINE *dotp;
- register int doto;
- register int cl;
- register int cr;
-
- dotp = curwp->w_dotp;
- doto = curwp->w_doto;
- if (doto==llength(dotp) && --doto<0)
- return (FALSE);
- cr = lgetc(dotp, doto);
- if (--doto < 0)
- return (FALSE);
- cl = lgetc(dotp, doto);
- lputc(dotp, doto+0, cr);
- lputc(dotp, doto+1, cl);
- lchange(WFEDIT);
- return (TRUE);
- }
-
- /*
- * Quote the next character, and insert it into the buffer. All the characters
- * are taken literally, with the exception of the newline, which always has
- * its line splitting meaning. The character is always read, even if it is
- * inserted 0 times, for regularity. Bound to "M-Q" (for me) and "C-Q" (for
- * Rich, and only on terminals that don't need XON-XOFF).
- */
- quote(f, n)
- {
- register int s;
- register int c;
-
- /* c = (*term.t_getchar)(); */
- c = Crawcin();
- if (n < 0)
- return (FALSE);
- if (n == 0)
- return (TRUE);
- if (c == '\n') {
- do {
- s = lnewline();
- } while (s==TRUE && --n);
- return (s);
- }
- return (linsert(n, c));
- }
-
- /*
- * Set tab size if given non-default argument (n <> 1). Otherwise, insert a
- * tab into file. If given argument, n, of zero, change to true tabs.
- * If n > 1, simulate tab stop every n-characters using spaces. This has to be
- * done in this slightly funny way because the tab (in ASCII) has been turned
- * into "C-I" (in 10 bit code) already. Bound to "C-I".
- */
- tab(f, n)
- {
- if (n < 0)
- return (FALSE);
- if (n == 0 || n > 1) {
- tabsize = n;
- return(TRUE);
- }
- if (! tabsize)
- return(linsert(1, '\t'));
- return(linsert(tabsize - (getccol(FALSE) % tabsize), ' '));
- }
-
- /*
- * 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".
- */
- openline(f, n)
- {
- register int i;
- register int s;
-
- 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, n); /* of them all. */
- return (s);
- }
-
- /*
- * Insert a newline. Bound to "C-M". 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.
- */
- newline(f, n)
- {
- int nicol;
- register LINE *lp;
- register int s;
-
- if (n < 0)
- return (FALSE);
- while (n--) {
- lp = curwp->w_dotp;
- if (llength(lp) == curwp->w_doto
- && lp != curbp->b_linep
- && llength(lforw(lp)) == 0) {
- if ((s=forwchar(FALSE, 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.
- */
- deblank(f, n)
- {
- register LINE *lp1;
- register LINE *lp2;
- register int nld;
-
- lp1 = curwp->w_dotp;
- while (llength(lp1)==0 && (lp2=lback(lp1))!=curbp->b_linep)
- lp1 = lp2;
- lp2 = lp1;
- nld = 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(nld));
- }
-
- /*
- * 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".
- */
- indent(f, n)
- {
- register int nicol;
- register int c;
- register int i;
-
- if (n < 0)
- return (FALSE);
- while (n--) {
- nicol = 0;
- for (i=0; i<llength(curwp->w_dotp); ++i) {
- c = lgetc(curwp->w_dotp, i);
- if (c!=' ' && c!='\t')
- break;
- if (c == '\t')
- nicol |= 0x07;
- ++nicol;
- }
- if (lnewline() == FALSE
- || ((i=nicol/8)!=0 && linsert(i, '\t')==FALSE)
- || ((i=nicol%8)!=0 && linsert(i, ' ')==FALSE))
- return (FALSE);
- }
- return (TRUE);
- }
-
- /*
- * 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".
- */
- forwdel(f, n)
- {
- if (n < 0)
- return (backdel(f, -n));
- if (f != FALSE) { /* Really a kill. */
- if ((lastflag&CFKILL) == 0)
- kdelete();
- thisflag |= CFKILL;
- }
- return (ldelete(n, f));
- }
-
- /*
- * 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. Bound to
- * both "RUBOUT" and "C-H".
- */
- backdel(f, n)
- {
- register int s;
-
- if (n < 0)
- return (forwdel(f, -n));
- if (f != FALSE) { /* Really a kill. */
- if ((lastflag&CFKILL) == 0)
- kdelete();
- thisflag |= CFKILL;
- }
- if ((s=backchar(f, n)) == TRUE)
- s = ldelete(n, f);
- return (s);
- }
-
- /*
- * Kill text. 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 backwards
- * that number of newlines. Normally bound to "C-K".
- */
- kill(f, n)
- {
- register int chunk;
- register LINE *nextp;
-
- if ((lastflag&CFKILL) == 0) /* Clear kill buffer if */
- kdelete(); /* last wasn't a kill. */
- thisflag |= CFKILL;
- if (f == FALSE) {
- chunk = llength(curwp->w_dotp)-curwp->w_doto;
- if (chunk == 0)
- chunk = 1;
- } else if (n == 0) {
- chunk = curwp->w_doto;
- curwp->w_doto = 0;
- } else if (n > 0) {
- chunk = llength(curwp->w_dotp)-curwp->w_doto+1;
- nextp = lforw(curwp->w_dotp);
- while (--n) {
- if (nextp == curbp->b_linep)
- return (FALSE);
- chunk += llength(nextp)+1;
- nextp = lforw(nextp);
- }
- } else {
- mlwrite("neg kill");
- return (FALSE);
- }
- return (ldelete(chunk, TRUE));
- }
-
- /*
- * 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. Bound to "C-Y". 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.
- */
- yank(f, n)
- {
- register int c;
- register int i;
- extern int kused;
-
- if (n < 0)
- return (FALSE);
- while (n--) {
- i = 0;
- while ((c=kremove(i)) >= 0) {
- if (c == '\n') {
- if (newline(FALSE, 1) == FALSE)
- return (FALSE);
- } else {
- if (linsert(1, c) == FALSE)
- return (FALSE);
- }
- ++i;
- }
- }
- return (TRUE);
- }
-
- /* -eof- */
-