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uemacs/random.c

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/* random.c -- implements random.h */
#include "random.h"
/* This file contains the command processing functions for a number of
random commands. There is no functional grouping here, for sure.
Modified by Petri Kutvonen
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "basic.h"
#include "buffer.h"
#include "display.h"
#include "estruct.h"
#include "execute.h"
#include "input.h"
#include "line.h"
#include "search.h"
#include "terminal.h"
#include "window.h"
static const char *cname[] = { /* names of colors */
"BLACK", "RED", "GREEN", "YELLOW", "BLUE",
"MAGENTA", "CYAN", "WHITE"
#if PKCODE & IBMPC
, "HIGH"
#endif
} ;
#define NCOLORS (sizeof cname / sizeof( *cname)) /* # of supported colors */
int gfcolor = NCOLORS - 1 ; /* global forgrnd color (white) */
int gbcolor = 0 ; /* global backgrnd color (black) */
boolean hardtab = TRUE ; /* use hard tab instead of soft tab */
int fillcol = 72 ; /* Current fill column */
/* uninitialized global definitions */
int thisflag ; /* Flags, this command */
int lastflag ; /* Flags, last command */
static int adjustmode( int kind, int global) ;
static int cinsert( void) ;
/* Set fill column to n. Bound to C-X F set-fill-column.
*/
BINDABLE( setfillcol) {
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 hex), 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 = buffer-position.
*/
BINDABLE( showcpos) {
line_p lp ; /* current line */
long numchars; /* # of chars in file */
int numlines; /* # of lines in file */
long predchars; /* # chars preceding point */
int predlines; /* # lines preceding point */
unicode_t curchar ; /* character under cursor */
unsigned bytes ; /* length of unicode sequence */
int ratio;
int col;
int savepos; /* temp save for current offset */
int ecol; /* column pos/end of current line */
/* start counting chars and lines */
numchars = 0;
numlines = 0;
predchars = 0;
predlines = 0;
bytes = lgetchar( &curchar) ;
for( lp = lforw( curbp->b_linep) ; lp != curbp->b_linep ; lp = lforw( lp)) {
/* if we are on the current line, record it */
if (lp == curwp->w_dotp) {
predlines = numlines;
predchars = numchars + curwp->w_doto;
}
/* on to the next line */
++numlines;
numchars += llength( lp) + ((curbp->b_mode & MDDOS) ? 2 : 1) ;
}
/* if at end of file, record it */
if (curwp->w_dotp == curbp->b_linep) {
predlines = numlines;
predchars = numchars;
bytes = 0 ;
}
/* Get real column and end-of-line column. */
col = getccol(FALSE);
savepos = curwp->w_doto;
curwp->w_doto = llength(curwp->w_dotp);
ecol = getccol(FALSE);
curwp->w_doto = savepos;
/* Ratio before dot. */
ratio = (numchars == 0) ? 100 : (100L * predchars) / numchars ;
/* summarize and report the info */
char fmtbuf[] = "Line %d/%d Col %d/%d Char %D/%D (%d%%) char = %s%x" ;
if( bytes == 0)
strcpy( &fmtbuf[ 39], "EOF") ;
mlwrite( fmtbuf, predlines + 1, numlines + 1, col, ecol, predchars,
numchars, ratio, (bytes > 1) ? "\\u" : "0x", curchar) ;
return TRUE;
}
int getcline(void)
{ /* get the current line number */
line_p lp ; /* current line */
int numlines; /* # of lines before point */
/* starting at the beginning of the buffer */
lp = lforw(curbp->b_linep);
/* start counting lines */
numlines = 0;
while (lp != curbp->b_linep) {
/* if we are on the current line, record it */
if (lp == curwp->w_dotp)
break;
++numlines;
lp = lforw(lp);
}
/* and return the resulting count */
return numlines + 1;
}
/* Return current column. Stop at first non-blank given TRUE argument.
*/
int getccol( int bflg) {
int i, col ;
line_p dlp = curwp->w_dotp ;
int byte_offset = curwp->w_doto ;
int len = llength( dlp) ;
col = i = 0;
while (i < byte_offset) {
unicode_t c;
i += utf8_to_unicode(dlp->l_text, i, len, &c);
if( bflg && c != ' ' && c != '\t') /* Request Stop at first non-blank */
break ;
if (c == '\t')
col += tabwidth - col % tabwidth ;
else if (c < 0x20 || c == 0x7F) /* displayed as ^c */
col += 2 ;
else if (c >= 0x80 && c <= 0xa0) /* displayed as \xx */
col += 3 ;
else {
col += utf8_width( c) ;
}
}
return col ;
}
/*
* Set current column.
*
* int pos; position to set cursor
*/
boolean setccol( int pos) {
int i; /* index into current line */
int col; /* current cursor column */
int llen; /* length of line in bytes */
char *text ;
col = 0;
llen = llength(curwp->w_dotp);
text = curwp->w_dotp->l_text ;
/* scan the line until we are at or past the target column */
for( i = 0 ; i < llen && col < pos ; ) {
unicode_t c ; /* character being scanned */
/* advance one character */
i += utf8_to_unicode( text, i, llen, &c) ;
if (c == '\t')
col += tabwidth - col % tabwidth ;
else if (c < 0x20 || c == 0x7F) /* displayed as ^C */
col += 2 ;
else if (c >= 0x80 && c <= 0xa0) /* displayed as \xx */
col += 3 ;
else
col += 1 ;
}
/* set us at the new position */
curwp->w_doto = i;
/* and tell whether we made it */
return col >= pos;
}
/* 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.
*/
BBINDABLE( twiddle) {
unicode_t c ;
boolean eof_f = FALSE ;
assert( !(curbp->b_mode & MDVIEW)) ;
int len = llength( curwp->w_dotp) ;
if( len < 2 || curwp->w_doto == 0) /* at least 2 chars & not bol */
return FALSE ;
if( curwp->w_doto == len) { /* at end of line */
backchar( FALSE, 1) ;
eof_f = TRUE ;
}
len = lgetchar( &c) ; /* len => unicode or extended ASCII */
ldelchar( 1, FALSE) ;
backchar( FALSE, 1) ;
if( len == 1)
linsert_byte( 1, c) ;
else
linsert( 1, c) ;
if( eof_f == TRUE)
forwchar( FALSE, 1) ;
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-character.
*/
BINDABLE( quote) {
int ret ;
assert( !(curbp->b_mode & MDVIEW)) ;
int c = ectoc( get1key()) ;
if( n < 0)
ret = FALSE ;
else if( n == 0)
ret = TRUE ;
else if( c == '\n')
do
ret = lnewline() ;
while( ret == TRUE && --n) ;
else
ret = linsert( n, c) ;
return ret ;
}
/* Insert tab/blank/space up to nth next tabulation according to hard/soft
tab current state and tab width. Bound to C-I handle-tab.
*/
BINDABLE( insert_tab) {
int status ;
if( n < 0)
status = FALSE ;
else if( n == 0)
status = TRUE ;
else if( hardtab == TRUE)
status = linsert( n, '\t') ;
else /* softtab */
do {
status = linsert( tabwidth - getccol( FALSE) % tabwidth, ' ') ;
} while( status != FALSE && --n) ;
return status ;
}
/*
* change tabs to spaces
*
* int f, n; default flag and numeric repeat count
*/
BINDABLE( detab) {
assert( !(curbp->b_mode & MDVIEW)) ;
if( f == FALSE)
n = 1 ;
/* loop thru detabbing n lines */
int inc = (n > 0) ? 1 : -1 ; /* increment to next line [sgn(n)] */
for( ; n ; n -= inc) {
curwp->w_doto = 0; /* start at the beginning */
/* detab the entire current line */
while (curwp->w_doto < llength(curwp->w_dotp)) {
/* if we have a tab */
if( curwbyte() == '\t') {
int size ;
ldelchar( 1, FALSE) ;
size = tabwidth - curwp->w_doto % tabwidth ;
insspace( TRUE, size) ;
forwchar( TRUE, size) ;
} else
forwchar( FALSE, 1) ;
}
/* advance/or back to the next line */
if( forwline( TRUE, inc) == FALSE)
break ;
}
curwp->w_doto = 0; /* to the begining of the line */
thisflag &= ~CFCPCN; /* flag that this resets the goal column */
lchange(WFEDIT); /* yes, we have made at least an edit */
return (n == 0) ? TRUE : FALSE ;
}
/*
* change spaces to tabs where possible
*
* int f, n; default flag and numeric repeat count
*/
BINDABLE( entab) {
#define nextab(a) (a + tabwidth - a % tabwidth)
assert( !(curbp->b_mode & MDVIEW)) ;
if( f == FALSE)
n = 1 ;
/* loop thru entabbing n lines */
int inc = (n > 0) ? 1 : -1 ; /* increment to next line [sgn(n)] */
for( ; n ; n -= inc) {
int fspace ; /* pointer to first space if in a run */
int ccol ; /* current cursor column */
curwp->w_doto = 0; /* start at the beginning */
/* entab the entire current line */
fspace = -1;
ccol = 0;
while (curwp->w_doto < llength(curwp->w_dotp)) {
/* see if it is time to compress */
if ((fspace >= 0) && (nextab(fspace) <= ccol)) {
if (ccol - fspace < 2)
fspace = -1;
else {
/* there is a bug here dealing with mixed space/tabed
lines.......it will get fixed */
backchar(TRUE, ccol - fspace);
ldelete( (long) (ccol - fspace), FALSE) ;
linsert(1, '\t');
fspace = -1;
}
}
/* get the current character */
switch( curwbyte()) {
case '\t': /* a tab...count em up */
ccol = nextab(ccol);
break;
case ' ': /* a space...compress? */
if (fspace == -1)
fspace = ccol;
ccol++;
break;
default: /* any other char...just count */
ccol++;
fspace = -1;
}
forwchar(FALSE, 1);
}
/* advance/or back to the next line */
if( forwline( TRUE, inc) == FALSE)
break ;
}
curwp->w_doto = 0; /* to the begining of the line */
thisflag &= ~CFCPCN; /* flag that this resets the goal column */
lchange(WFEDIT); /* yes, we have made at least an edit */
return (n == 0) ? TRUE : FALSE ;
}
/*
* trim trailing whitespace from the point to eol
*
* int f, n; default flag and numeric repeat count
*/
BINDABLE( trim) {
assert( !(curbp->b_mode & MDVIEW)) ;
if( f == FALSE)
n = 1 ;
/* loop thru trimming n lines */
int inc = (n > 0) ? 1 : -1 ; /* increment to next line [sgn(n)] */
for( ; n ; n -= inc) {
line_p lp ; /* current line pointer */
int offset ; /* original line offset position */
int length ; /* current length */
lp = curwp->w_dotp; /* find current line text */
offset = curwp->w_doto; /* save original offset */
/* trim the current line */
for( length = lp->l_used ; length > offset ; length--) {
char c = lgetc( lp, length - 1) ;
if( c != ' ' && c != '\t')
break ;
}
lp->l_used = length;
/* advance/or back to the next line */
if( forwline( TRUE, inc) == FALSE)
break ;
}
lchange(WFEDIT);
thisflag &= ~CFCPCN; /* flag that this resets the goal column */
return (n == 0) ? TRUE : FALSE ;
}
/*
* 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".
*/
BINDABLE( openline) {
assert( !(curbp->b_mode & MDVIEW)) ;
int ret = (n < 0) ? FALSE : TRUE ;
for( int i = n ; ret == TRUE && i ; i--) /* Insert newlines. */
ret = lnewline() ;
if( ret == TRUE) /* Then back up overtop */
ret = backchar( f, n) ; /* of them all. */
return ret ;
}
/*
* Insert a newline. Bound to "C-M". If we are in CMODE, do automatic
* indentation as specified.
*/
BINDABLE( insert_newline) {
assert( !(curbp->b_mode & MDVIEW)) ;
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();
/*
* If a newline was typed, fill column is defined, the argument is non-
* negative, wrap mode is enabled, and we are now past fill column,
* and we are not read-only, perform word wrap.
*/
if ((curwp->w_bufp->b_mode & MDWRAP) && fillcol > 0 &&
getccol(FALSE) > fillcol &&
(curwp->w_bufp->b_mode & MDVIEW) == FALSE)
execute(META | SPEC | 'W', FALSE, 1);
/* insert some lines */
while (n--) {
int s ;
if ((s = lnewline()) != TRUE)
return s;
#if SCROLLCODE
curwp->w_flag |= WFINS;
#endif
}
return TRUE;
}
static int cinsert(void)
{ /* insert a newline and indentation for C */
char *cptr; /* string pointer into text to copy */
int tptr; /* index to scan into line */
int bracef; /* was there a brace at the end of line? */
int i, nicol ;
/* grab a pointer to text to copy indentation from */
cptr = &curwp->w_dotp->l_text[0];
/* check for a brace */
tptr = curwp->w_doto ;
bracef = (tptr > 0) && (cptr[ tptr - 1] == '{') ;
/* save the indent of the previous line */
nicol = 0 ;
for( i = 0 ; i < tptr ; i += 1) {
int ch ;
ch = cptr[ i] ;
if( ch == ' ')
nicol += 1 ;
else if( ch == '\t')
nicol += tabwidth - nicol % tabwidth ;
else
break ;
}
if( i == tptr) { /* all line is blank */
curwp->w_doto = 0 ; /* gotobol */
lnewline() ;
curwp->w_doto = tptr ; /* gotoeol */
} else {
/* put in the newline */
if (lnewline() == FALSE)
return FALSE;
/* and the saved indentation */
i = nicol % tabwidth ; /* spaces */
nicol /= tabwidth ; /* tabs */
if( bracef) {
/* and one more tab for a brace */
nicol += 1 ;
i = 0 ;
}
if( nicol > 0)
insert_tab( FALSE, nicol) ;
if( i > 0)
linsert( i, ' ') ;
}
#if SCROLLCODE
curwp->w_flag |= WFINS;
#endif
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
* delete-blank-lines. Any argument is ignored.
*/
BINDABLE( deblank) {
line_p lp1, lp2 ;
long nld ;
assert( !(curbp->b_mode & MDVIEW)) ;
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, FALSE);
}
/* Insert a newline, then enough tabs and spaces to duplicate the
* indentation of the previous line. Assumes tabs are every tabwidth
* characters. 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
* newline-and-indent.
*/
BINDABLE( indent) {
int i ;
assert( !(curbp->b_mode & MDVIEW)) ;
if( n < 0)
return FALSE ;
/* number of columns to indent */
int nicol = 0 ;
for( i = 0 ; i < llength( curwp->w_dotp) ; i += 1) {
int c ;
c = lgetc( curwp->w_dotp, i) ;
if( c == '\t')
nicol += tabwidth - nicol % tabwidth ;
else if( c == ' ')
nicol += 1 ;
else
break ;
}
i = nicol / tabwidth ; /* # of tab to insert */
nicol %= tabwidth ; /* # of space to insert */
while( n--)
if( lnewline() == FALSE
|| ( i != 0 && insert_tab( FALSE, i) == FALSE)
|| ( nicol != 0 && linsert( nicol, ' ') == 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".
*/
BINDABLE( forwdel) {
assert( !(curbp->b_mode & MDVIEW)) ;
if( n == 0)
return TRUE ;
else if( n < 0)
return backdel( f, -n) ;
if (f != FALSE) { /* Really a kill. */
if ((lastflag & CFKILL) == 0)
kdelete();
thisflag |= CFKILL;
}
return ldelchar( n, f != FALSE) ;
}
/*
* 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".
*/
BINDABLE( backdel) {
assert( !(curbp->b_mode & MDVIEW)) ;
if( n == 0)
return TRUE ;
else if( n < 0)
return forwdel( f, -n) ;
if (f != FALSE) { /* Really a kill. */
if ((lastflag & CFKILL) == 0)
kdelete();
thisflag |= CFKILL;
}
return backchar( f, n) && ldelchar( n, f != FALSE) ;
}
/*
* 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".
*/
BINDABLE( killtext) {
line_p nextp ;
long chunk;
assert( !(curbp->b_mode & MDVIEW)) ;
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);
}
/* prompt and set an editor mode
*
* int f, n; default and argument
*/
BINDABLE( setemode) {
return adjustmode( TRUE, FALSE) ;
}
/* prompt and delete an editor mode
*
* int f, n; default and argument
*/
BINDABLE( delmode) {
return adjustmode( FALSE, FALSE) ;
}
/* prompt and set a global editor mode
*
* int f, n; default and argument
*/
BINDABLE( setgmode) {
return adjustmode( TRUE, TRUE) ;
}
/* prompt and delete a global editor mode
*
* int f, n; default and argument
*/
BINDABLE( delgmode) {
return adjustmode( FALSE, TRUE) ;
}
/* change the editor mode status
*
* int kind; true = set, false = delete
* int global; true = global flag, false = current buffer flag
*/
static int adjustmode( int kind, int global) {
unsigned i ; /* loop index */
int status; /* error return on input */
char prompt[50]; /* string to prompt user with */
char *cbuf ; /* 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 */
status = newmlarg( &cbuf, prompt, 0) ;
if (status != TRUE)
return status;
/* test it first against the colors we know */
for (i = 0; i < NCOLORS; i++) {
if( strcasecmp( cbuf, cname[ i]) == 0) {
/* finding the match, we set the color */
#if COLOR
if( *cbuf >= 'A' && *cbuf <= 'Z') {
if (global)
gfcolor = i;
#if PKCODE == 0
else
#endif
curwp->w_fcolor = i;
} else {
if (global)
gbcolor = i;
#if PKCODE == 0
else
#endif
curwp->w_bcolor = i;
}
curwp->w_flag |= WFCOLR;
#endif
mlerase();
free( cbuf) ;
return TRUE;
}
}
/* test it against the modes we know */
for (i = 0; i < NUMMODES; i++) {
if( strcasecmp( cbuf, modename[ i]) == 0) {
/* finding a match, we process it */
if (kind == TRUE)
if (global)
gmode |= (1 << i);
else
curbp->b_mode |= (1 << i);
else if (global)
gmode &= ~(1 << i);
else
curbp->b_mode &= ~(1 << i);
/* display new mode line */
if (global == 0)
upmode();
mlerase(); /* erase the junk */
free( cbuf) ;
return TRUE;
}
}
mlwrite("No such mode!");
free( cbuf) ;
return FALSE;
}
static int iovstring( int f, int n, const char *prompt, int (*fun)( char *)) {
char *tstring ; /* string to add */
/* ask for string to insert */
int status = newmlargt( &tstring, prompt, 0) ;
if( tstring == NULL)
return status ;
if( f == FALSE)
n = 1 ;
else if( n < 0)
n = -n ;
/* insert it */
while( n-- && status == TRUE)
status = fun( tstring) ;
free( tstring) ;
return status ;
}
/* ask for and insert a string into the current buffer at the current point
int f, n; ignored arguments
*/
BINDABLE( istring) {
return iovstring( f, n, "insert-string<META>: ", linstr) ;
}
/* ask for and overwite a string into the current buffer at the current
point
int f, n; ignored arguments
*/
BINDABLE( ovstring) {
return iovstring( f, n, "overwrite-string<META>: ", lover) ;
}
/* end of random.c */
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