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uemacs/bind.c

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/* bind.c -- implements bind.h */
#include "bind.h"
/* This file is for functions having to do with key bindings,
* descriptions, help commands and startup file.
*
* Written 11-feb-86 by Daniel Lawrence
* Modified by Petri Kutvonen
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "estruct.h"
#include "bindable.h"
#include "buffer.h"
#include "display.h"
#include "exec.h"
#include "file.h"
#include "flook.h"
#include "input.h"
#include "line.h"
#include "names.h"
#include "util.h"
#include "window.h"
static int buildlist( char *mstring) ;
static char *cmdstr( unsigned c, char *seq) ;
static unsigned int getckey( int mflag) ;
static unsigned int stock( char *keyname) ;
static const char *getfname( unsigned keycode, const char *failmsg) ;
static boolean cmdfail( const char *msg) {
mlwrite( "%s", msg) ;
return FALSE ;
}
BINDABLE( help) {
/* give me some help!!!!
bring up a fake buffer and read the help file into it with view mode */
char *fname = NULL; /* ptr to file returned by flook() */
/* first check if we are already here */
buffer_p bp = bfind( hlpfname, FALSE, BFINVS);
if( bp == curbp)
return TRUE ;
if( bp == NULL) {
fname = flook( hlpfname, FALSE) ;
if( fname == NULL)
return cmdfail( "(Help file is not online)") ;
}
/* split the current window to make room for the help stuff */
if( wheadp->w_wndp == NULL /* One window */
&& splitwind( FALSE, 1) == FALSE) /* Split it */
return FALSE ;
if (bp == NULL) {
/* and read the stuff in */
if (getfile(fname, FALSE) == FALSE)
return FALSE;
} else
swbuffer( bp) ;
/* make this window in VIEW mode, update all mode lines */
curwp->w_bufp->b_mode |= MDVIEW;
curwp->w_bufp->b_flag |= BFINVS;
upmode() ;
return TRUE;
}
static boolean invalidkey( void) {
return cmdfail( "(Invalid key sequence)") ;
}
/* describe the command for a certain key */
BINDABLE( deskey) {
const char cmdname[] = "describe-key" ;
char outseq[ NSTRING] ; /* output buffer for command sequence */
/* prompt the user to type a key to describe */
mlwrite( "%s: ", cmdname) ;
/* get the command sequence to describe
* change it to something we can print as well */
unsigned keycode = getckey( FALSE) ;
if( keycode == (unsigned) ~0)
return invalidkey() ;
/* output the command sequence */
mlwrite( "%s %s: 0x%x, %s", cmdname, cmdstr( keycode, outseq), keycode,
getfname( keycode, "Not Bound")) ;
return TRUE ;
}
/*
* bindtokey:
* add a new key to the key binding table
*
* int f, n; command arguments [IGNORED]
*/
BINDABLE( bindtokey) {
kbind_p ktp ; /* pointer into the command table */
char outseq[ 80] ; /* output buffer for keystroke sequence */
/* prompt the user to type in a key to bind */
mlwrite("bind-to-key: ");
/* get the function name to bind it to */
nbind_p nbp = getname() ;
if( nbp == NULL) /* abort */
return FALSE ;
fnp_t kfunc = nbp->n_func ;
if( kfunc == NULL)
return cmdfail( "(No such function)") ;
mlwrite( "bind-to-key %s: ", bind_name( nbp)) ;
/* get the command sequence to bind */
boolean prefix_f = (kfunc == metafn) || (kfunc == cex) ||
(kfunc == unarg) || (kfunc == ctrlg) ;
int c = getckey( prefix_f) ;
if( c == ~0)
return invalidkey() ;
/* change it to something we can print as well */
/* and dump it out */
ostring( cmdstr( c, outseq)) ;
/* key sequence can't be an active prefix key */
if( c == metac || c == ctlxc || c == reptc || c == abortc) {
if( (c == metac && kfunc == metafn)
|| (c == ctlxc && kfunc == cex)
|| (c == reptc && kfunc == unarg)
|| (c == abortc && kfunc == ctrlg))
return TRUE ;
return cmdfail( "(Can't bind to active prefix)") ;
}
/* if the function is a prefix key */
if( prefix_f) {
/* remove existing binding for the prefix */
for( ktp = keytab ; ktp->k_code != 0 ; ktp++)
if( ktp->k_nbp == nbp) {
delkeybinding( ktp->k_code) ;
break ;
}
/* set the appropriate global prefix variable */
if( kfunc == metafn)
metac = c ;
else if( kfunc == cex)
ctlxc = c ;
if( kfunc == unarg)
reptc = c ;
if( kfunc == ctrlg)
abortc = c ;
}
ktp = setkeybinding( c, nbp) ;
if( ktp->k_code == 0)
return cmdfail( "Binding table FULL!") ;
return TRUE ;
}
/*
* unbindkey:
* delete a key from the key binding table
*
* int f, n; command arguments [IGNORED]
*/
BINDABLE( unbindkey) {
char outseq[ 80] ; /* output buffer for keystroke sequence */
/* prompt the user to type in a key to unbind */
mlwrite( "unbind-key: ") ;
/* get the command sequence to unbind */
int c = getckey( FALSE) ; /* get a command sequence */
if( c == ~0)
return invalidkey() ;
/* change it to something we can print as well */
/* and dump it out */
ostring( cmdstr( c, outseq)) ;
/* prefix key sequence can't be undound, just redefined */
if( c == reptc || c == abortc)
return cmdfail( "(Can't unbind prefix)") ;
/* if it isn't bound, bitch */
if( delkeybinding( c) == FALSE) {
mlwrite( "(Key not bound)") ;
return FALSE ;
}
return TRUE ;
}
/*
* does source include sub?
*
* char *source; string to search in
* char *sub; substring to look for
*/
static boolean strinc( const char *source, const char *sub) {
/* for each character in the source string */
for( ; *source ; source++) {
const char *nxtsp ; /* next ptr into source */
const char *tp ; /* ptr into substring */
nxtsp = source;
/* is the substring here? */
for( tp = sub ; *tp ; tp++)
if( *nxtsp++ != *tp)
break ;
/* yes, return a success */
if( *tp == 0)
return TRUE ;
}
return FALSE ;
}
/* describe bindings
* bring up a fake buffer and list the key bindings
* into it with view mode
*/
BINDABLE( desbind) {
return buildlist( "") ;
}
/* Apropos (List functions that match a substring) */
BINDABLE( apro) {
char *mstring ; /* string to match cmd names to */
int status = newmlarg( &mstring, "apropos: ", 0) ;
if( status == TRUE) {
status = buildlist( mstring) ;
free( mstring) ;
} else if( status == FALSE)
status = buildlist( "") ; /* build list of all commands */
return status ;
}
/*
* build a binding list (limited or full)
*
* char *mstring; match string if a partial list, "" matches all
*/
static int buildlist( char *mstring) {
struct window *wp; /* scanning pointer to windows */
kbind_p ktp; /* pointer into the command table */
nbind_p nptr;/* pointer into the name binding table */
struct buffer *bp; /* buffer to put binding list into */
char outseq[80]; /* output buffer for keystroke sequence */
/* split the current window to make room for the binding list */
if( wheadp->w_wndp == NULL /* One window */
&& splitwind( FALSE, 1) == FALSE) /* Split it */
return FALSE;
/* and get a buffer for it */
bp = bfind("*Binding list*", TRUE, 0);
if( bp == NULL || bclear( bp) == FALSE)
return cmdfail( "Can't display binding list") ;
/* let us know this is in progress */
mlwrite("(Building binding list)");
/* disconnect the current buffer */
if (--curbp->b_nwnd == 0) { /* Last use. */
curbp->b_dotp = curwp->w_dotp;
curbp->b_doto = curwp->w_doto;
curbp->b_markp = curwp->w_markp;
curbp->b_marko = curwp->w_marko;
}
/* connect the current window to this buffer */
curbp = bp; /* make this buffer current in current window */
bp->b_mode = 0; /* no modes active in binding list */
bp->b_nwnd++; /* mark us as more in use */
wp = curwp;
wp->w_bufp = bp;
wp->w_linep = bp->b_linep;
wp->w_flag = WFHARD | WFFORCE;
wp->w_dotp = bp->b_dotp;
wp->w_doto = bp->b_doto;
wp->w_markp = NULL;
wp->w_marko = 0;
/* build the contents of this window, inserting it line by line */
for( nptr = names ; nptr->n_func != NULL ; nptr++) {
int cpos ; /* current position to use in outseq */
/* if we are executing an apropos command..... */
/* and current string doesn't include the search string */
if( *mstring && strinc( bind_name( nptr), mstring) == FALSE)
continue ;
/* add in the command name */
mystrscpy( outseq, bind_name( nptr), sizeof outseq) ;
cpos = strlen(outseq);
/* search down any keys bound to this */
for( ktp = keytab ; ktp->k_code != 0 ; ktp++) {
if( ktp->k_nbp == nptr) {
/* padd out some spaces */
while (cpos < 28)
outseq[cpos++] = ' ';
/* add in the command sequence */
cmdstr(ktp->k_code, &outseq[cpos]);
strcat(outseq, "\n");
/* and add it as a line into the buffer */
if (linstr(outseq) != TRUE)
return FALSE;
cpos = 0; /* and clear the line */
}
}
/* if no key was bound, we need to dump it anyway */
if (cpos > 0) {
outseq[cpos++] = '\n';
outseq[cpos] = 0;
if (linstr(outseq) != TRUE)
return FALSE;
}
}
bp->b_mode |= MDVIEW; /* put this buffer view mode */
bp->b_flag &= ~BFCHG; /* don't flag this as a change */
wp->w_dotp = lforw(bp->b_linep); /* back to the beginning */
wp->w_doto = 0;
upmode() ; /* and update ALL mode lines */
mlwrite(""); /* clear the mode line */
return TRUE;
}
/*
* get a command key sequence from the keyboard
*
* int mflag; going for a meta sequence?
* returns ~0 on failure
*/
static unsigned int getckey( int mflag) {
unsigned int c ; /* character fetched */
/* check to see if we are executing a command line */
if( clexec) {
char *tok = getnewtokval() ; /* get the next token */
if( tok == NULL)
c = ~0 ; /* return invalid key on failure */
else {
c = stock( tok) ;
free( tok) ;
}
} else { /* or the normal way */
if( mflag)
c = get1key() ;
else
c = getcmd() ;
}
return c ;
}
/*
* execute the startup file
*
* char *fname; name of startup file (null if default)
*/
int startup( const char *fname) {
if( !fname || *fname == 0) /* use default if empty parameter */
fname = rcfname ;
fname = flook( fname, TRUE) ; /* look up the startup file */
if( fname == NULL) /* if it isn't around, don't sweat it */
return TRUE ;
return dofile( fname) ; /* otherwise, execute the sucker */
}
/*
* change a key command to a string we can print out
*
* int c; sequence to translate
* char *seq; destination string for sequence
*/
static char *cmdstr( unsigned c, char *seq) {
char *ptr = seq ; /* pointer into current position in sequence */
/* apply meta sequence if needed */
if( c & META) {
*ptr++ = 'M';
*ptr++ = '-';
}
/* apply ^X sequence if needed */
if( c & CTLX) {
if( ctlxc & CTRL)
*ptr++ = '^' ;
*ptr++ = ctlxc & ~PRFXMASK ;
}
/* apply control sequence if needed */
if( c & CTRL)
*ptr++ = '^' ;
/* apply SPEC sequence if needed */
if( c & SPEC) {
*ptr++ = 'F' ;
*ptr++ = 'N' ;
}
/* and output the final sequence */
ptr += unicode_to_utf8( c & ~PRFXMASK, ptr) ;
*ptr = 0 ; /* terminate the string */
return seq ;
}
static const char *getfname( unsigned keycode, const char *failmsg) {
/* takes a key code and gets the name of the function bound to it */
kbind_p kbp = getkeybinding( keycode) ;
if( kbp->k_code == 0)
return failmsg ;
const char *found = bind_name( kbp->k_nbp) ;
assert( *found) ;
return found ;
}
/* stock:
* String key name TO Command Key
*
* char *keyname; name of key to translate to Command key form
* fmt: [M-|^X][^][FN]X
* returns ~0 on invalid sequence
*/
static unsigned int stock( char *keyname) {
/* parse it up */
unsigned c = 0 ;
/* first, the prefix META or ^X */
if( *keyname == 'M' && keyname[ 1] == '-') {
c = META ;
keyname += 2 ;
} else if( *keyname == '^' && keyname[ 1] == 'X') {
c = CTLX ;
keyname += 2 ;
}
/* a control char? */
if( *keyname == '^' && keyname[ 1] != 0) {
c |= CTRL ;
++keyname ;
}
/* next the function prefix */
if( *keyname == 'F' && keyname[ 1] == 'N') {
c |= SPEC ;
keyname += 2 ;
}
/* only one character left to parse */
if( !*keyname || keyname[1])
return ~0 ;
/* only way to redefine ^X is by quoting binary value */
if( *keyname < 32 || *keyname == 0x7F) {
c |= CTRL ;
*keyname ^= 0x40 ;
} else if( c && !(c & SPEC)
&& *keyname >= 'a' && *keyname <= 'z')
/* make sure we are not lower case (not with function keys) */
*keyname -= 32 ;
/* the final sequence... */
c |= *keyname & 0xFFU ;
return c ;
}
/*
* string key name to binding name....
*
* char *skey; name of key to get binding for
*/
const char *transbind( char *skey) {
static const char failmsg[] = "ERROR" ;
unsigned c = stock( skey) ;
if( c == (unsigned) ~0)
return failmsg ;
else
return getfname( c, failmsg) ;
}
/* end of bind.c */
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