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534 lines
13 KiB
C
534 lines
13 KiB
C
/* bind.c -- implements bind.h */
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#include "bind.h"
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/* bind.c
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*
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* This file is for functions having to do with key bindings,
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* descriptions, help commands and startup file.
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*
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* Written 11-feb-86 by Daniel Lawrence
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* Modified by Petri Kutvonen
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "estruct.h"
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#include "bindable.h"
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#include "buffer.h"
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#include "display.h"
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#include "exec.h"
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#include "file.h"
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#include "flook.h"
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#include "input.h"
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#include "line.h"
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#include "names.h"
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#include "util.h"
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#include "window.h"
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#if APROP
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static int buildlist( char *mstring) ;
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#endif
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static void cmdstr( int c, char *seq) ;
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static unsigned int getckey( int mflag) ;
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static unsigned int stock( char *keyname) ;
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static const char *getfname( unsigned keycode, char *failmsg) ;
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int help(int f, int n)
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{ /* give me some help!!!!
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bring up a fake buffer and read the help file
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into it with view mode */
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struct buffer *bp; /* buffer pointer to help */
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char *fname = NULL; /* ptr to file returned by flook() */
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/* first check if we are already here */
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bp = bfind( hlpfname, FALSE, BFINVS);
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if (bp == NULL) {
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fname = flook( hlpfname, FALSE);
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if (fname == NULL) {
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mlwrite("(Help file is not online)");
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return FALSE;
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}
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}
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/* split the current window to make room for the help stuff */
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if (splitwind(FALSE, 1) == FALSE)
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return FALSE;
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if (bp == NULL) {
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/* and read the stuff in */
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if (getfile(fname, FALSE) == FALSE)
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return FALSE;
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} else
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swbuffer(bp);
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/* make this window in VIEW mode, update all mode lines */
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curwp->w_bufp->b_mode |= MDVIEW;
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curwp->w_bufp->b_flag |= BFINVS;
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upmode() ;
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return TRUE;
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}
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/* describe the command for a certain key */
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BINDABLE( deskey) {
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char outseq[ NSTRING] ; /* output buffer for command sequence */
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/* prompt the user to type a key to describe */
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mlwrite( "describe-key: ");
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/* get the command sequence to describe
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* change it to something we can print as well */
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int c = getckey( FALSE) ;
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cmdstr( c, outseq) ;
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/* output the command sequence */
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mlwrite( "describe-key %s: 0x%x, %s",
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outseq, c, getfname( c, "Not Bound")) ;
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return TRUE ;
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}
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/*
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* bindtokey:
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* add a new key to the key binding table
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*
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* int f, n; command arguments [IGNORED]
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*/
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BINDABLE( bindtokey) {
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key_tab *ktp ; /* pointer into the command table */
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char outseq[ 80] ; /* output buffer for keystroke sequence */
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/* prompt the user to type in a key to bind */
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mlwrite("bind-to-key: ");
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/* get the function name to bind it to */
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const name_bind *nbp = getname() ;
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if( nbp == NULL) /* abort */
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return FALSE ;
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fnp_t kfunc = nbp->n_func ;
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if( kfunc == NULL) {
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mlwrite( "(No such function)") ;
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return FALSE ;
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}
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mlwrite( "bind-to-key %s: ", bind_name( nbp)) ;
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/* get the command sequence to bind */
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boolean prefix_f = (kfunc == metafn) || (kfunc == cex) ||
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(kfunc == unarg) || (kfunc == ctrlg) ;
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int c = getckey( prefix_f) ;
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/* change it to something we can print as well */
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cmdstr( c, outseq) ;
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/* and dump it out */
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ostring( outseq) ;
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/* key sequence can't be an active prefix key */
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if( c == metac || c == ctlxc || c == reptc || c == abortc) {
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if( (c == metac && kfunc == metafn)
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|| (c == ctlxc && kfunc == cex)
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|| (c == reptc && kfunc == unarg)
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|| (c == abortc && kfunc == ctrlg))
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return TRUE ;
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mlwrite( "(Can't bind to active prefix)") ;
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return FALSE ;
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}
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/* if the function is a prefix key */
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if( prefix_f) {
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/* remove existing binding for the prefix */
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for( ktp = keytab ; ktp->k_code != 0 ; ktp++)
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if( ktp->k_nbp == nbp) {
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delkeybinding( ktp->k_code) ;
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break ;
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}
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/* set the appropriate global prefix variable */
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if( kfunc == metafn)
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metac = c ;
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else if( kfunc == cex)
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ctlxc = c ;
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if( kfunc == unarg)
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reptc = c ;
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if( kfunc == ctrlg)
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abortc = c ;
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}
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ktp = setkeybinding( c, nbp) ;
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if( ktp->k_code == 0) {
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mlwrite( "Binding table FULL!") ;
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return FALSE ;
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}
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return TRUE ;
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}
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/*
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* unbindkey:
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* delete a key from the key binding table
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*
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* int f, n; command arguments [IGNORED]
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*/
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BINDABLE( unbindkey) {
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char outseq[ 80] ; /* output buffer for keystroke sequence */
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/* prompt the user to type in a key to unbind */
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mlwrite( "unbind-key: ") ;
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/* get the command sequence to unbind */
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int c = getckey( FALSE) ; /* get a command sequence */
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/* change it to something we can print as well */
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cmdstr( c, outseq) ;
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/* and dump it out */
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ostring( outseq) ;
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/* prefix key sequence can't be undound, just redefined */
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if( c == reptc || c == abortc) {
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mlwrite( "(Can't unbind prefix)") ;
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return FALSE ;
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}
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/* if it isn't bound, bitch */
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if( delkeybinding( c) == FALSE) {
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mlwrite( "(Key not bound)") ;
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return FALSE ;
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}
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return TRUE ;
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}
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#if APROP
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/*
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* does source include sub?
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*
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* char *source; string to search in
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* char *sub; substring to look for
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*/
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static boolean strinc( const char *source, const char *sub) {
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/* for each character in the source string */
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for( ; *source ; source++) {
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const char *nxtsp ; /* next ptr into source */
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const char *tp ; /* ptr into substring */
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nxtsp = source;
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/* is the substring here? */
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for( tp = sub ; *tp ; tp++)
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if( *nxtsp++ != *tp)
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break ;
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/* yes, return a success */
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if( *tp == 0)
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return TRUE ;
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}
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return FALSE ;
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}
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#endif
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/* describe bindings
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* bring up a fake buffer and list the key bindings
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* into it with view mode
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*/
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int desbind( int f, int n) {
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#if APROP
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return buildlist( "") ;
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}
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/* Apropos (List functions that match a substring) */
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int apro( int f, int n) {
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char *mstring ; /* string to match cmd names to */
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int status ; /* status return */
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status = newmlarg( &mstring, "apropos: ", 0) ;
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if( status == TRUE) {
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status = buildlist( mstring) ;
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free( mstring) ;
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} else if( status == FALSE)
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status = buildlist( "") ; /* build list of all commands */
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return status ;
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}
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/*
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* build a binding list (limited or full)
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*
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* char *mstring; match string if a partial list, "" matches all
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*/
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static int buildlist( char *mstring) {
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#endif
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struct window *wp; /* scanning pointer to windows */
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key_tab *ktp; /* pointer into the command table */
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const name_bind *nptr;/* pointer into the name binding table */
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struct buffer *bp; /* buffer to put binding list into */
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char outseq[80]; /* output buffer for keystroke sequence */
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/* split the current window to make room for the binding list */
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if (splitwind(FALSE, 1) == FALSE)
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return FALSE;
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/* and get a buffer for it */
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bp = bfind("*Binding list*", TRUE, 0);
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if (bp == NULL || bclear(bp) == FALSE) {
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mlwrite("Can not display binding list");
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return FALSE;
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}
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/* let us know this is in progress */
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mlwrite("(Building binding list)");
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/* disconect the current buffer */
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if (--curbp->b_nwnd == 0) { /* Last use. */
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curbp->b_dotp = curwp->w_dotp;
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curbp->b_doto = curwp->w_doto;
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curbp->b_markp = curwp->w_markp;
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curbp->b_marko = curwp->w_marko;
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}
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/* connect the current window to this buffer */
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curbp = bp; /* make this buffer current in current window */
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bp->b_mode = 0; /* no modes active in binding list */
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bp->b_nwnd++; /* mark us as more in use */
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wp = curwp;
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wp->w_bufp = bp;
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wp->w_linep = bp->b_linep;
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wp->w_flag = WFHARD | WFFORCE;
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wp->w_dotp = bp->b_dotp;
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wp->w_doto = bp->b_doto;
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wp->w_markp = NULL;
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wp->w_marko = 0;
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/* build the contents of this window, inserting it line by line */
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for( nptr = names ; nptr->n_func != NULL ; nptr++) {
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int cpos ; /* current position to use in outseq */
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#if APROP
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/* if we are executing an apropos command..... */
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/* and current string doesn't include the search string */
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if( *mstring && strinc( bind_name( nptr), mstring) == FALSE)
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continue ;
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#endif
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/* add in the command name */
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mystrscpy( outseq, bind_name( nptr), sizeof outseq) ;
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cpos = strlen(outseq);
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/* search down any keys bound to this */
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for( ktp = keytab ; ktp->k_code != 0 ; ktp++) {
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if( ktp->k_nbp == nptr) {
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/* padd out some spaces */
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while (cpos < 28)
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outseq[cpos++] = ' ';
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/* add in the command sequence */
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cmdstr(ktp->k_code, &outseq[cpos]);
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strcat(outseq, "\n");
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/* and add it as a line into the buffer */
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if (linstr(outseq) != TRUE)
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return FALSE;
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cpos = 0; /* and clear the line */
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}
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}
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/* if no key was bound, we need to dump it anyway */
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if (cpos > 0) {
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outseq[cpos++] = '\n';
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outseq[cpos] = 0;
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if (linstr(outseq) != TRUE)
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return FALSE;
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}
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}
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bp->b_mode |= MDVIEW; /* put this buffer view mode */
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bp->b_flag &= ~BFCHG; /* don't flag this as a change */
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wp->w_dotp = lforw(bp->b_linep); /* back to the beginning */
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wp->w_doto = 0;
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upmode() ; /* and update ALL mode lines */
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mlwrite(""); /* clear the mode line */
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return TRUE;
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}
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/*
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* get a command key sequence from the keyboard
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*
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* int mflag; going for a meta sequence?
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*/
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static unsigned int getckey( int mflag) {
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unsigned int c ; /* character fetched */
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/* check to see if we are executing a command line */
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if( clexec) {
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char *tok ; /* command incoming */
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tok = getnewtokval() ; /* get the next token */
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if( tok == NULL)
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c = 0 ; /* return dummy key on failure */
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else {
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c = stock( tok) ;
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free( tok) ;
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}
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} else { /* or the normal way */
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if( mflag)
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c = get1key() ;
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else
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c = getcmd() ;
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}
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return c ;
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}
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/*
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* execute the startup file
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*
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* char *fname; name of startup file (null if default)
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*/
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int startup( const char *fname) {
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if( !fname || *fname == 0) /* use default if empty parameter */
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fname = rcfname ;
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fname = flook( fname, TRUE) ; /* look up the startup file */
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if( fname == NULL) /* if it isn't around, don't sweat it */
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return TRUE ;
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return dofile( fname) ; /* otherwise, execute the sucker */
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}
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/*
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* change a key command to a string we can print out
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*
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* int c; sequence to translate
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* char *seq; destination string for sequence
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*/
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static void cmdstr( int c, char *seq) {
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char *ptr; /* pointer into current position in sequence */
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ptr = seq;
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/* apply meta sequence if needed */
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if (c & META) {
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*ptr++ = 'M';
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*ptr++ = '-';
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}
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/* apply ^X sequence if needed */
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if (c & CTLX) {
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if( ctlxc & CONTROL)
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*ptr++ = '^' ;
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*ptr++ = ctlxc & 0x1FFFFF ;
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}
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/* apply SPEC sequence if needed */
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if (c & SPEC) {
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*ptr++ = 'F';
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*ptr++ = 'N';
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}
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/* apply control sequence if needed */
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if (c & CONTROL) {
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*ptr++ = '^';
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}
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/* and output the final sequence */
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*ptr++ = c & 0x1FFFFF ; /* strip the prefixes */
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*ptr = 0; /* terminate the string */
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}
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/*
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* This function looks a key binding up in the binding table
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*
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* int c; key to find what is bound to it
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*/
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key_tab *getkeybind( unsigned c) {
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key_tab *ktp ;
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for( ktp = keytab ; ktp->k_code != 0 ; ktp++)
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if (ktp->k_code == c)
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break ;
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return ktp ;
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}
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static const char *getfname( unsigned keycode, char *failmsg) {
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/* takes a key code and gets the name of the function bound to it */
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key_tab *kbp = getkeybind( keycode) ;
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if( kbp->k_code == 0)
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return failmsg ;
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const char *found = bind_name( kbp->k_nbp) ;
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assert( *found) ;
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return found ;
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}
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/*
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* stock:
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* String key name TO Command Key
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*
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* char *keyname; name of key to translate to Command key form
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*/
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static unsigned int stock( char *keyname) {
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unsigned int c; /* key sequence to return */
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/* parse it up */
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c = 0;
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/* first, the META prefix */
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if (*keyname == 'M' && *(keyname + 1) == '-') {
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c = META;
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keyname += 2;
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}
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/* next the function prefix */
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if (*keyname == 'F' && *(keyname + 1) == 'N') {
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c |= SPEC;
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keyname += 2;
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}
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/* control-x as well... (but not with FN) */
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if (*keyname == '^' && *(keyname + 1) == 'X' && !(c & SPEC)) {
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c |= CTLX;
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keyname += 2;
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}
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/* a control char? */
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if (*keyname == '^' && *(keyname + 1) != 0) {
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c |= CONTROL;
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++keyname;
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}
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if (*keyname < 32) {
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c |= CONTROL;
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*keyname += 'A';
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}
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/* make sure we are not lower case (not with function keys) */
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if (*keyname >= 'a' && *keyname <= 'z' && !(c & SPEC))
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*keyname -= 32;
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/* the final sequence... */
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c |= *keyname & 0xFFU ;
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return c;
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}
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/*
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* string key name to binding name....
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*
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* char *skey; name of key to get binding for
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*/
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const char *transbind( char *skey) {
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return getfname( stock( skey), "ERROR") ;
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}
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