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/* region.c
*
* 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.
*
* Modified by Petri Kutvonen
*/
#include <stdio.h>
#include "estruct.h"
#include "edef.h"
#include "efunc.h"
#include "line.h"
/*
* 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".
*/
int killregion(int f, int n)
{
int s;
struct 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 */
kdelete(); /* 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".
*/
int copyregion(int f, int n)
{
struct line *linep;
int loffs;
int s;
struct region region;
if ((s = getregion(®ion)) != TRUE)
return s;
if ((lastflag & CFKILL) == 0) /* Kill type command. */
kdelete();
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('\n')) != TRUE)
return s;
linep = lforw(linep);
loffs = 0;
} else { /* Middle of line. */
if ((s = kinsert(lgetc(linep, loffs))) != TRUE)
return s;
++loffs;
}
}
mlwrite("(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".
*/
int lowerregion(int f, int n)
{
struct line *linep;
int loffs;
int c;
int s;
struct 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);
if (c >= 'A' && c <= 'Z')
lputc(linep, loffs, c + 'a' - 'A');
++loffs;
}
}
return TRUE;
}
/*
* Upper case region. Zap all of the lower
* case characters in the region to 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".
*/
int upperregion(int f, int n)
{
struct line *linep;
int loffs;
int c;
int s;
struct 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);
if (c >= 'a' && c <= 'z')
lputc(linep, loffs, c - 'a' + 'A');
++loffs;
}
}
return TRUE;
}
/*
* This routine figures out the
* bounds of the region in the current window, and
* fills in the fields of the "struct 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
* conform thing later.
*/
int getregion(struct region *rp)
{
struct line *flp;
struct line *blp;
long fsize;
long bsize;
if (curwp->w_markp == NULL) {
mlwrite("No mark set in this window");
return FALSE;
}
if (curwp->w_dotp == curwp->w_markp) {
rp->r_linep = curwp->w_dotp;
if (curwp->w_doto < curwp->w_marko) {
rp->r_offset = curwp->w_doto;
rp->r_size =
(long) (curwp->w_marko - curwp->w_doto);
} else {
rp->r_offset = curwp->w_marko;
rp->r_size =
(long) (curwp->w_doto - curwp->w_marko);
}
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) {
rp->r_linep = curwp->w_dotp;
rp->r_offset = curwp->w_doto;
rp->r_size = fsize + curwp->w_marko;
return TRUE;
}
fsize += llength(flp) + 1;
}
if (lback(blp) != curbp->b_linep) {
blp = lback(blp);
bsize += llength(blp) + 1;
if (blp == curwp->w_markp) {
rp->r_linep = blp;
rp->r_offset = curwp->w_marko;
rp->r_size = bsize - curwp->w_marko;
return TRUE;
}
}
}
mlwrite("Bug: lost mark");
return FALSE;
}
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