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- /*
- * The routines in this file
- * deal with the region, that magic space
- * between "." and mark. Some functions are
- * commands. Some functions are just for
- * internal use.
- */
- #include <stdio.h>
- #include "estruct.h"
- #include "eproto.h"
- #include "edef.h"
- #include "elang.h"
-
- /* reglines: how many lines in the current region
- used by the trim/entab/detab-region commands
- */
-
- int PASCAL NEAR reglines()
-
- {
- register LINE *linep; /* position while scanning */
- register int n; /* number of lines in this current region */
- REGION region;
-
- /* check for a valid region first */
- if (getregion(®ion) != TRUE)
- return(0);
-
- /* start at the top of the region.... */
- linep = region.r_linep;
- region.r_size += region.r_offset;
- n = 0;
-
- /* scan the region... counting lines */
- while (region.r_size > 0L) {
- region.r_size -= llength(linep) + 1;
- linep = lforw(linep);
- n++;
- }
-
- /* place us at the beginning of the region */
- curwp->w_dotp = region.r_linep;
- curwp->w_doto = region.r_offset;
-
- return(n);
- }
-
- /*
- * Kill the region. Ask "getregion"
- * to figure out the bounds of the region.
- * Move "." to the start, and kill the characters.
- * Bound to "C-W".
- */
- PASCAL NEAR killregion(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register int s;
- REGION region;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if ((s=getregion(®ion)) != TRUE)
- return(s);
- if ((lastflag&CFKILL) == 0) /* This is a kill type */
- next_kill(); /* command, so do magic */
- thisflag |= CFKILL; /* kill buffer stuff. */
- curwp->w_dotp = region.r_linep;
- curwp->w_doto = region.r_offset;
- return(ldelete(region.r_size, TRUE));
- }
-
- /*
- * Copy all of the characters in the
- * region to the kill buffer. Don't move dot
- * at all. This is a bit like a kill region followed
- * by a yank. Bound to "M-W".
- */
- PASCAL NEAR copyregion(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register LINE *linep;
- register int loffs;
- register int s;
- REGION region;
-
- if ((s=getregion(®ion)) != TRUE)
- return(s);
- if ((lastflag&CFKILL) == 0) /* Kill type command. */
- next_kill();
- thisflag |= CFKILL;
- linep = region.r_linep; /* Current line. */
- loffs = region.r_offset; /* Current offset. */
- while (region.r_size--) {
- if (loffs == llength(linep)) { /* End of line. */
- if ((s=kinsert(FORWARD, '\r')) != TRUE)
- return(s);
- linep = lforw(linep);
- loffs = 0;
- } else { /* Middle of line. */
- if ((s=kinsert(FORWARD, lgetc(linep, loffs))) != TRUE)
- return(s);
- ++loffs;
- }
- }
- mlwrite(TEXT70);
- /* "[region copied]" */
- return(TRUE);
- }
-
- /*
- * Lower case region. Zap all of the upper
- * case characters in the region to lower case. Use
- * the region code to set the limits. Scan the buffer,
- * doing the changes. Call "lchange" to ensure that
- * redisplay is done in all buffers. Bound to
- * "C-X C-L".
- */
- PASCAL NEAR lowerregion(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register LINE *linep;
- register int loffs;
- register int s;
- int c;
- REGION region;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if ((s=getregion(®ion)) != TRUE)
- return(s);
- lchange(WFHARD);
- linep = region.r_linep;
- loffs = region.r_offset;
- while (region.r_size--) {
- if (loffs == llength(linep)) {
- linep = lforw(linep);
- loffs = 0;
- } else {
- c = lgetc(linep, loffs);
- c = lowerc(c);
- lputc(linep, loffs, c);
- ++loffs;
- }
- }
- return(TRUE);
- }
-
- /*
- * Upper case region. Zap all of the lower
- * case characters in hüSRCo upper case. Use
- * the region code to set the limits. Scan the buffer,
- * doing the changes. Call "lchange" to ensure that
- * redisplay is done in all buffers. Bound to
- * "C-X C-L".
- */
- PASCAL NEAR upperregion(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register LINE *linep;
- register int loffs;
- register int s;
- int c;
- REGION region;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if ((s=getregion(®ion)) != TRUE)
- return(s);
- lchange(WFHARD);
- linep = region.r_linep;
- loffs = region.r_offset;
- while (region.r_size--) {
- if (loffs == llength(linep)) {
- linep = lforw(linep);
- loffs = 0;
- } else {
- c = lgetc(linep, loffs);
- c = upperc(c);
- lputc(linep, loffs, c);
- ++loffs;
- }
- }
- return(TRUE);
- }
-
- /* Narrow-to-region (^X-<) makes all but the current region in
- the current buffer invisable and unchangable
- */
-
- PASCAL NEAR narrow(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register int status; /* return status */
- BUFFER *bp; /* buffer being narrowed */
- SCREEN *scrp; /* screen to fix pointers in */
- WINDOW *wp; /* windows to fix up pointers in as well */
- REGION creg; /* region boundry structure */
- int cmark; /* current mark */
-
- /* find the proper buffer and make sure we aren't already narrow */
- bp = curwp->w_bufp; /* find the right buffer */
- if (bp->b_flag&BFNAROW) {
- mlwrite(TEXT71);
- /* "%%This buffer is already narrowed" */
- return(FALSE);
- }
-
- /* find the boundries of the current region */
- if ((status=getregion(&creg)) != TRUE)
- return(status);
- curwp->w_dotp = creg.r_linep; /* only by full lines please! */
- curwp->w_doto = 0;
- creg.r_size += (long)creg.r_offset;
- if (creg.r_size <= (long)curwp->w_dotp->l_used) {
- mlwrite(TEXT72);
- /* "%%Must narrow at least 1 full line" */
- return(FALSE);
- }
-
- /* archive the top fragment */
- if (bp->b_linep->l_fp != creg.r_linep) {
- bp->b_topline = bp->b_linep->l_fp;
- creg.r_linep->l_bp->l_fp = (LINE *)NULL;
- bp->b_linep->l_fp = creg.r_linep;
- creg.r_linep->l_bp = bp->b_linep;
- }
-
- /* move forward to the end of this region
- (a long number of bytes perhaps) */
- while (creg.r_size > (long)32000) {
- forwchar(TRUE, 32000);
- creg.r_size -= (long)32000;
- }
- forwchar(TRUE, (int)creg.r_size);
- curwp->w_doto = 0; /* only full lines! */
-
- /* archive the bottom fragment */
- if (bp->b_linep != curwp->w_dotp) {
- bp->b_botline = curwp->w_dotp;
- bp->b_botline->l_bp->l_fp = bp->b_linep;
- bp->b_linep->l_bp->l_fp = (LINE *)NULL;
- bp->b_linep->l_bp = bp->b_botline->l_bp;
- }
-
- /* in all screens.... */
- scrp = first_screen;
- while (scrp) {
-
- /* let all the proper windows be updated */
- wp = scrp->s_first_window;
- while (wp) {
- if (wp->w_bufp == bp) {
- wp->w_linep = creg.r_linep;
- wp->w_dotp = creg.r_linep;
- wp->w_doto = 0;
- for (cmark = 0; cmark < NMARKS; cmark++) {
- wp->w_markp[cmark] = creg.r_linep;
- wp->w_marko[cmark] = 0;
- }
- wp->w_flag |= (WFHARD|WFMODE);
- }
- wp = wp->w_wndp;
- }
-
- /* next screen! */
- scrp = scrp->s_next_screen;
- }
-
- /* and now remember we are narrowed */
- bp->b_flag |= BFNAROW;
- mlwrite(TEXT73);
- /* "[Buffer is narrowed]" */
- return(TRUE);
- }
-
- /* widen-from-region (^X->) restores a narrowed region */
-
- PASCAL NEAR widen(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- LINE *lp; /* temp line pointer */
- BUFFER *bp; /* buffer being narrowed */
- SCREEN *scrp; /* screen to fix pointers in */
- WINDOW *wp; /* windows to fix up pointers in as well */
- int cmark; /* current mark */
-
- /* find the proper buffer and make sure we are narrow */
- bp = curwp->w_bufp; /* find the right buffer */
- if ((bp->b_flag&BFNAROW) == 0) {
- mlwrite(TEXT74);
- /* "%%This buffer is not narrowed" */
- return(FALSE);
- }
-
- /* recover the top fragment */
- if (bp->b_topline != (LINE *)NULL) {
- lp = bp->b_topline;
- while (lp->l_fp != (LINE *)NULL)
- lp = lp->l_fp;
- lp->l_fp = bp->b_linep->l_fp;
- lp->l_fp->l_bp = lp;
- bp->b_linep->l_fp = bp->b_topline;
- bp->b_topline->l_bp = bp->b_linep;
- bp->b_topline = (LINE *)NULL;
- }
-
- /* recover the bottom fragment */
- if (bp->b_botline != (LINE *)NULL) {
-
- /* if the point is at EOF, move it to
- the beginning of the bottom fragment */
- if (curwp->w_dotp == bp->b_linep) {
- curwp->w_dotp = bp->b_botline;
- curwp->w_doto = 0; /* this should be redundent */
- }
-
- /* if any marks are at EOF, move them to
- the beginning of the bottom fragment */
- for (cmark = 0; cmark < NMARKS; cmark++) {
- if (curwp->w_markp[cmark] == bp->b_linep) {
- curwp->w_markp[cmark] = bp->b_botline;
- curwp->w_marko[cmark] = 0;
- }
- }
-
- /* connect the bottom fragment */
- lp = bp->b_botline;
- while (lp->l_fp != (LINE *)NULL)
- lp = lp->l_fp;
- lp->l_fp = bp->b_linep;
- bp->b_linep->l_bp->l_fp = bp->b_botline;
- bp->b_botline->l_bp = bp->b_linep->l_bp;
- bp->b_linep->l_bp = lp;
- bp->b_botline = (LINE *)NULL;
- }
-
- /* in all screens.... */
- scrp = first_screen;
- while (scrp) {
-
- /* let all the proper windows be updated */
- wp = scrp->s_first_window;
- while (wp) {
- if (wp->w_bufp == bp)
- wp->w_flag |= (WFHARD|WFMODE);
- wp = wp->w_wndp;
- }
-
- /* next screen! */
- scrp = scrp->s_next_screen;
- }
-
- /* and now remember we are not narrowed */
- bp->b_flag &= (~BFNAROW);
- mlwrite(TEXT75);
- /* "[Buffer is widened]" */
- return(TRUE);
- }
-
- /*
- * This routine figures out the bounds of the region in the current
- * window, and fills in the fields of the "REGION" structure pointed to by
- * "rp". Because the dot and mark are usually very close together, we scan
- * outward from dot looking for mark. This should save time. Return a
- * standard code. Callers of this routine should be prepared to get an
- * "ABORT" status; we might make this have the confirm thing later.
- */
-
- PASCAL NEAR getregion(rp)
-
- register REGION *rp;
-
- {
- register LINE *flp;
- register LINE *blp;
- long fsize;
- long bsize;
-
- if (curwp->w_markp[0] == (LINE *)NULL) {
- mlwrite(TEXT76);
- /* "No mark set in this window" */
- return(FALSE);
- }
- if (curwp->w_dotp == curwp->w_markp[0]) {
- rp->r_linep = curwp->w_dotp;
- if (curwp->w_doto < curwp->w_marko[0]) {
- rp->r_offset = curwp->w_doto;
- rp->r_size = (long)(curwp->w_marko[0]-curwp->w_doto);
- } else {
- rp->r_offset = curwp->w_marko[0];
- rp->r_size = (long)(curwp->w_doto-curwp->w_marko[0]);
- }
- return(TRUE);
- }
- blp = curwp->w_dotp;
- bsize = (long)curwp->w_doto;
- flp = curwp->w_dotp;
- fsize = (long)(llength(flp)-curwp->w_doto+1);
- while (flp!=curbp->b_linep || lback(blp)!=curbp->b_linep) {
- if (flp != curbp->b_linep) {
- flp = lforw(flp);
- if (flp == curwp->w_markp[0]) {
- rp->r_linep = curwp->w_dotp;
- rp->r_offset = curwp->w_doto;
- rp->r_size = fsize+curwp->w_marko[0];
- return(TRUE);
- }
- fsize += llength(flp)+1;
- }
- if (lback(blp) != curbp->b_linep) {
- blp = lback(blp);
- bsize += llength(blp)+1;
- if (blp == curwp->w_markp[0]) {
- rp->r_linep = blp;
- rp->r_offset = curwp->w_marko[0];
- rp->r_size = bsize - curwp->w_marko[0];
- return(TRUE);
- }
- }
- }
- mlwrite(TEXT77);
- /* "Bug: lost mark" */
- return(FALSE);
- }
-
- /*
- * Copy all of the characters in the region to the string buffer.
- * It is assumed that the buffer size is at least one plus the
- * region size.
- */
- char *PASCAL NEAR regtostr(buf, region)
-
- char *buf;
- REGION *region;
-
- {
- register LINE *linep;
- register int loffs;
- register long rsize;
- register char *ptr;
-
- ptr = buf;
- linep = region->r_linep; /* Current line. */
- loffs = region->r_offset; /* Current offset. */
- rsize = region->r_size;
- while (rsize--) {
- if (loffs == llength(linep)) { /* End of line. */
- *ptr = '\r';
- linep = lforw(linep);
- loffs = 0;
- } else { /* Middle of line. */
- *ptr = lgetc(linep, loffs);
- ++loffs;
- }
- ptr++;
- }
- *ptr = '\0';
- return buf;
- }
-
- char *PASCAL NEAR getreg(value) /* return some of the contents of the current region */
-
- char *value;
-
- {
- REGION region;
-
- /* get the region limits */
- if (getregion(®ion) != TRUE)
- return(errorm);
-
- /* don't let the region be larger than a string can hold */
- if (region.r_size >= NSTRING)
- region.r_size = NSTRING - 1;
- return(regtostr(value, ®ion));
- }
-
-
- PASCAL NEAR indent_region(f, n) /* indent a region n tab-stops */
-
- int f,n; /* default flag and numeric repeat count */
-
- {
- register int inc; /* increment to next line [sgn(n)] */
- int count;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
-
- if (f == FALSE)
- count = 1;
- else
- count = n;
- n = reglines();
-
- /* loop thru indenting n lines */
- inc = ((n > 0) ? 1 : -1);
- while (n) {
- curwp->w_doto = 0; /* start at the beginning */
-
- /* shift current line using tabs */
- if (!((curbp->b_mode & MDCMOD) &&
- (lgetc(curwp->w_dotp, curwp->w_doto) == '#')) ) {
- linsert(count, '\t');
- }
-
- /* advance/or back to the next line */
- forwline(TRUE, inc);
- n -= inc;
- }
-
- curwp->w_doto = 0;
- thisflag &= ~CFCPCN; /* flag that this resets the goal column */
- lchange(WFEDIT); /* yes, we have made at least an edit */
- return(TRUE);
- }
-
- PASCAL NEAR undent_region(f, n) /* undent a region n tab-stops */
-
- int f,n; /* default flag and numeric repeat count */
-
- {
- register int inc; /* increment to next line [sgn(n)] */
- int i, count;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
-
- if (f == FALSE)
- count = 1;
- else
- count = n;
- n = reglines();
-
- /* loop thru undenting n lines */
- inc = ((n > 0) ? 1 : -1);
- while (n) {
- /* unshift current line using tabs */
- for (i = 0; i < count; i++) {
- curwp->w_doto = 0; /* start at the beginning */
- if ((curwp->w_dotp->l_used > 0) &&
- (lgetc(curwp->w_dotp, curwp->w_doto) == '\t')) {
- ldelete(1L, FALSE);
- }
- }
-
- /* advance/or back to the next line */
- forwline(TRUE, inc);
- n -= inc;
- }
-
- thisflag &= ~CFCPCN; /* flag that this resets the goal column */
- lchange(WFEDIT); /* yes, we have made at least an edit */
- return(TRUE);
- }
-