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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 <stdio.h>
- #include "estruct.h"
- #include "edef.h"
-
- int tabsize; /* Tab size (0: use real tabs) */
-
- /*
- * Set fill column to n.
- */
- setfillcol(f, n)
- {
- fillcol = n;
- mlwrite("[Fill column is %d]",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;
-
- 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;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- 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 "C-Q"
- */
- quote(f, n)
- {
- register int s;
- register int c;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- c = (*term.t_getchar)();
- 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 (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- 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 we are in CMODE, do automatic
- * indentation as specified.
- */
- newline(f, n)
- {
- register int s;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if (n < 0)
- return (FALSE);
-
- /* if we are in C mode and this is a default <NL> */
- if (n == 1 && (curbp->b_mode & MDCMOD) &&
- curwp->w_dotp != curbp->b_linep)
- return(cinsert());
-
- /* insert some lines */
- while (n--) {
- if ((s=lnewline()) != TRUE)
- return (s);
- }
- return (TRUE);
- }
-
- cinsert() /* insert a newline and indentation for C */
-
- {
- register char *cptr; /* string pointer into text to copy */
- register int tptr; /* index to scan into line */
- register int bracef; /* was there a brace at the end of line? */
- register int i;
- char ichar[NSTRING]; /* buffer to hold indent of last line */
-
- /* grab a pointer to text to copy indentation from */
- cptr = &curwp->w_dotp->l_text[0];
-
- /* check for a brace */
- tptr = curwp->w_doto - 1;
- bracef = (cptr[tptr] == '{');
-
- /* save the indent of the previous line */
- i = 0;
- while ((i < tptr) && (cptr[i] == ' ' || cptr[i] == '\t')
- && (i < NSTRING - 1)) {
- ichar[i] = cptr[i];
- ++i;
- }
- ichar[i] = 0; /* terminate it */
-
- /* put in the newline */
- if (lnewline() == FALSE)
- return(FALSE);
-
- /* and the saved indentation */
- i = 0;
- while (ichar[i])
- linsert(1, ichar[i++]);
-
- /* and one more tab for a brace */
- if (bracef)
- tab(FALSE, 1);
-
- return(TRUE);
- }
-
- insbrace(n, c) /* insert a brace into the text here...we are in CMODE */
-
- int n; /* repeat count */
- int c; /* brace to insert (always { for now) */
-
- {
- register int ch; /* last character before input */
- register int i;
- register int target; /* column brace should go after */
-
- /* if we are at the begining of the line, no go */
- if (curwp->w_doto == 0)
- return(linsert(n,c));
-
- /* scan to see if all space before this is white space */
- for (i = curwp->w_doto - 1; i >= 0; --i) {
- ch = lgetc(curwp->w_dotp, i);
- if (ch != ' ' && ch != '\t')
- return(linsert(n, c));
- }
-
- /* delete back first */
- target = getccol(FALSE); /* calc where we will delete to */
- target -= 1;
- target -= target % (tabsize == 0 ? 8 : tabsize);
- while (getccol(FALSE) > target)
- backdel(FALSE, 1);
-
- /* and insert the required brace(s) */
- return(linsert(n, c));
- }
-
- inspound() /* insert a # into the text here...we are in CMODE */
-
- {
- register int ch; /* last character before input */
- register int i;
-
- /* if we are at the begining of the line, no go */
- if (curwp->w_doto == 0)
- return(linsert(1,'#'));
-
- /* scan to see if all space before this is white space */
- for (i = curwp->w_doto - 1; i >= 0; --i) {
- ch = lgetc(curwp->w_dotp, i);
- if (ch != ' ' && ch != '\t')
- return(linsert(1, '#'));
- }
-
- /* delete back first */
- while (getccol(FALSE) > 1)
- backdel(FALSE, 1);
-
- /* and insert the required pound */
- return(linsert(1, '#'));
- }
-
- /*
- * 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;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- 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 (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- 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 (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- 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 (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- 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".
- */
- killtext(f, n)
- {
- register int chunk;
- register LINE *nextp;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- 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
- * ms done by the standard insert routines. All you do is run the loop, and
- * check for errors. Bound to "C-Y".
- */
- yank(f, n)
- {
- register int c;
- register int i;
- extern int kused;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if (n < 0)
- return (FALSE);
- while (n--) {
- i = 0;
- while ((c=kremove(i)) >= 0) {
- if (c == '\n') {
- if (lnewline(FALSE, 1) == FALSE)
- return (FALSE);
- } else {
- if (linsert(1, c) == FALSE)
- return (FALSE);
- }
- ++i;
- }
- }
- return (TRUE);
- }
-
- setmode(f, n) /* prompt and set an editor mode */
-
- int f, n; /* default and argument */
-
- {
- adjustmode(TRUE, FALSE);
- }
-
- delmode(f, n) /* prompt and delete an editor mode */
-
- int f, n; /* default and argument */
-
- {
- adjustmode(FALSE, FALSE);
- }
-
- setgmode(f, n) /* prompt and set a global editor mode */
-
- int f, n; /* default and argument */
-
- {
- adjustmode(TRUE, TRUE);
- }
-
- delgmode(f, n) /* prompt and delete a global editor mode */
-
- int f, n; /* default and argument */
-
- {
- adjustmode(FALSE, TRUE);
- }
-
- adjustmode(kind, global) /* change the editor mode status */
-
- int kind; /* true = set, false = delete */
- int global; /* true = global flag, false = current buffer flag */
- {
- register char prompt[50]; /* string to prompt user with */
- register char *scan; /* scanning pointer to convert prompt */
- register int i; /* loop index */
- char cbuf[NPAT]; /* buffer to recieve mode name into */
-
- /* build the proper prompt string */
- if (global)
- strcpy(prompt,"Global mode to ");
- else
- strcpy(prompt,"Mode to ");
-
- if (kind == TRUE)
- strcat(prompt, "add: ");
- else
- strcat(prompt, "delete: ");
-
- /* prompt the user and get an answer */
-
- mlreply(prompt, cbuf, NPAT - 1);
-
- /* make it uppercase */
-
- scan = cbuf;
- while (*scan != 0) {
- if (*scan >= 'a' && *scan <= 'z')
- *scan = *scan - 32;
- scan++;
- }
-
- /* test it against the modes we know */
-
- for (i=0; i < NUMMODES; i++) {
- if (strcmp(cbuf, modename[i]) == 0) {
- /* finding a match, we process it */
- if (kind == TRUE)
- if (global)
- gmode |= (1 << i);
- else
- curwp->w_bufp->b_mode |= (1 << i);
- else
- if (global)
- gmode &= ~(1 << i);
- else
- curwp->w_bufp->b_mode &= ~(1 << i);
- /* display new mode line */
- if (global == 0)
- upmode();
- mlerase(); /* erase the junk */
- return(TRUE);
- }
- }
-
- mlwrite("No such mode!");
- return(FALSE);
- }
-