/* This file is part of
* = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
*
* LyX , The Document Processor
*
* Copyright ( C ) 1995 Matthias Ettrich
* Copyright ( C ) 1995 - 1998 The LyX Team .
*
*======================================================*/
#include <config.h>
#include <string.h>
#include <stdio.h>
#include "gettext.h"
// $Id: kbmap.C,v 1.1.1.1 1998/04/20 21:14:49 larsbj Exp $
#if !defined (lint) && !defined (WITH_WARNINGS)
static char vcid[] = "$Id: kbmap.C,v 1.1.1.1 1998/04/20 21:14:49 larsbj Exp $" ;
#endif /* lint */
#ifdef __GNUG__
#pragma implementation
#endif
#include "kbmap.h"
#include "error.h"
// The only modifiers that we handle. We want to throw away things
// like NumLock.
enum { ModsMask = ShiftMask | ControlMask | Mod1Mask};
// === static functions ===================================================
/* ---F+------------------------------------------------------------------ *\
Function : printKeysym
Called by : kb_sequence : : print and printKeyMap . RVDK_PATCH_5
Purpose : prints a keysym , including modifiers .
Parameters : key - keysym
mod - modifiers
buf - string where the result goes
maxlen - length of string ( including ' \ 0 ' )
Returns : length of printed string if ok , 0 otherwise .
\* ---F------------------------------------------------------------------- */
static
int printKeysym( KeySym key, unsigned int mod, char *buf, int maxlen )
{
int len;
char *s;
mod &= ModsMask;
// calc required length;
len = 0 ;
if ( mod & ShiftMask ) len += 2 ;
if ( mod & ControlMask ) len += 2 ;
if ( mod & Mod1Mask ) len += 2 ;
s = XKeysymToString( key );
if ( s ) len += strlen( s );
if ( len < maxlen ) {
if ( mod & ShiftMask ) {
*buf++ = 'S' ; *buf++ = '-' ; }
if ( mod & ControlMask ) {
*buf++ = 'C' ; *buf++ = '-' ; }
if ( mod & Mod1Mask ) {
*buf++ = 'M' ; *buf++ = '-' ; }
if ( s ) strcpy( buf, s );
return len;
} else
return 0 ;
}
/* ---F+------------------------------------------------------------------ *\
Function : printKeyTab
Called by : kb_keymap : : print
Purpose : print the keysyms found in the given key table . RVDK_PATCH_5
Parameters : tabPt - keytable pointer
buf - string where the result goes
maxLen - length of string ( including ' \ 0 ' )
Returns : length of printed string .
\* ---F------------------------------------------------------------------- */
static
int printKeyTab( kb_key *tabPt, char *buf, int maxLen )
{
int len, doneLen = 0 ;
unsigned int ksym, mod;
/* -------> Print each of the slots into buf. */
for ( ; (tabPt->code & 0 xffff) != NoSymbol; tabPt++) {
if ( maxLen <= 0 ) break ;
ksym = tabPt->code;
mod = tabPt->mod & 0 xffff;
len = printKeysym( ksym, mod, buf, maxLen );
if ( len <= 0 ) break ;
buf += len;
maxLen -= len;
doneLen += len;
/* -------> Add space when possible. */
if ( maxLen > 0 ) {
*buf++ = ' ' ;
*buf = '\0' ;
maxLen--;
doneLen++;
}
}
return doneLen;
}
// === kb_sequence methods ================================================
/* ---F+------------------------------------------------------------------ *\
Function : kb_sequence : : addkey
Called by : [ user ]
Purpose : add a key to the sequence , look up in map and return action
Parameters : key - keysym of key
mod - modifier mask
nmod - modifier veto mask ( unused now )
Returns : action or - 1 if error ( no map defined or key not found )
\* ---F------------------------------------------------------------------- */
int kb_sequence::addkey(KeySym key, unsigned int mod, unsigned int nmod /*=0*/)
{
if (length<0 ) length=0 ;
if (length+1 >= size) {
unsigned int *nseq = new unsigned int [size+KB_PREALLOC];
size += KB_PREALLOC;
memcpy(nseq, sequence, length*sizeof (unsigned int ));
if (sequence != staticseq) delete sequence;
sequence = nseq;
nseq = new unsigned int [size];
memcpy(nseq, modifiers, length*sizeof (unsigned int ));
if (modifiers != staticmod) delete modifiers;
modifiers = nseq;
}
modifiers[length] = mod + (nmod<<16 );
sequence[length++] = key;
if (curmap)
return curmap->lookup(key, mod, this );
return -1 ;
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_sequence : : parse
Called by : [ user ]
Purpose : parse a string that holds a key sequence and add the keys
Parameters : s - string holding the key sequence
Returns : 0 - if ok , error pos if error
Note : Keys must be separated with whitespace ;
Use the keysym names used by XStringToKeysym
Prefixes are S - , C - , M - for shift , control , meta
\* ---F------------------------------------------------------------------- */
int kb_sequence::parse(char const *s)
{
int i = 0 ;
unsigned int mod = 0 , nmod = 0 ;
KeySym key = 0 ;
char tbuf[100 ];
if (!s[0 ]) return 1 ;
while (s[i]) {
if (s[i] && ((unsigned char ) s[i]) <= ' ' ) i++;
if (!s[i]) break ;
if (s[i+1 ]=='-' ) { // is implicit that s[i]==true
switch (s[i]) {
case 's' : case 'S' :
mod |= ShiftMask;
i+=2 ;
continue ;
case 'c' : case 'C' :
mod |= ControlMask;
i+=2 ;
continue ;
case 'm' : case 'M' :
mod |= Mod1Mask;
i+=2 ;
continue ;
default :
return i+1 ;
}
} else if (s[i]=='~' && s[i+1 ] && s[i+2 ]=='-' ) {
switch (s[i+1 ]) {
case 's' : case 'S' :
nmod |= ShiftMask;
i+=3 ;
continue ;
case 'c' : case 'C' :
nmod |= ControlMask;
i+=3 ;
continue ;
case 'm' : case 'M' :
nmod |= Mod1Mask;
i+=3 ;
continue ;
default :
return i+2 ;
}
} else {
int j = 0 ;
for (j = i; s[j] && ((unsigned char )s[j])>' ' ; j++)
tbuf[j-i] = s[j]; // (!!!check bounds :-)
tbuf[j-i] = '\0' ;
key = XStringToKeysym(tbuf);
if (key == NoSymbol) {
lyxerr.debug("kbmap.C: No such keysym: "
+ LString(tbuf),Error::KBMAP);
return j;
}
i = j;
addkey(key, mod, nmod);
mod = 0 ;
nmod = 0 ;
}
}
return 0 ;
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_sequence : : print
Called by : [ user ]
Purpose : print the currently defined sequence into a string
Parameters : buf - string where the result goes
maxlen - length of string ( including ' \ 0 ' )
when_defined - only print when sequence is real : length > 0 .
Returns : 0 , if ok , - 1 if string too long
\* ---F------------------------------------------------------------------- */
int kb_sequence::print(char *buf, int maxlen, bool when_defined) const
{
KeySym key;
unsigned int mod;
int len;
int l = length;
if ( l<0 && !when_defined ) l = -l;
for (int i = 0 ; i < l; i++) {
key = sequence[i];
mod = modifiers[i] & 0 xffff;
len = printKeysym( key, mod, buf, maxlen ); // RVDK_PATCH_5
buf += len;
maxlen -= len;
if ( len == 0 ) {
*buf = '\0' ;
return -1 ;
}
if (i+1 <l && maxlen>1 ) { // append a blank
*buf++ = ' ' ;
maxlen--;
}
}
*buf = '\0' ;
return 0 ;
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_sequence : : printOptions
Called by : [ user ]
Purpose : print the available key options from the current state in the
sequence . RVDK_PATCH_5
Parameters : buf - string where the result goes
maxlen - length of string ( including ' \ 0 ' )
Returns : 0 , if ok , - 1 if string too long
\* ---F------------------------------------------------------------------- */
int kb_sequence::printOptions(char *buf, int maxlen) const
{
int len;
print( buf, maxlen, true );
len = strlen( buf );
maxlen -= len;
buf += len;
if ( maxlen < 20 || !curmap ) return -1 ;
#ifdef WITH_WARNINGS
#warning reimplement kb_sequence using LString
#endif
char s[20 ];
strcpy(s,_(" options: " ));
strcpy( buf, s);
buf += strlen(s);
maxlen -= strlen(s);
curmap->print(buf, maxlen);
return 0 ;
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_sequence : : delseq
Called by : [ user ]
Purpose : mark the sequence as deleted
Parameters : none
Returns : nothing
\* ---F------------------------------------------------------------------- */
void kb_sequence::delseq()
{
// negative length marks sequence as deleted, but we can still
// print() it or retrieve the last char using getiso()
length = -length;
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_sequence : : getsym
Called by : [ user ] , getiso
Purpose : get the keysym of the last key in sequence
Parameters : none
Returns : keysym
\* ---F------------------------------------------------------------------- */
KeySym kb_sequence::getsym()
{
int l = length;
if (l==0 ) return NoSymbol;
if (l<0 ) l = -l;
return sequence[l-1 ];
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_sequence : : getiso
Called by : [ user ]
Purpose : return iso character code of last key , if any
Parameters : none
Returns : iso code or 0 if none
\* ---F------------------------------------------------------------------- */
char kb_sequence::getiso()
{
int c = getsym();
if (c > 0 xff)
return '\0' ;
return (char )c;
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_sequence : : reset
Called by : [ user ]
Purpose : reset sequence to initial state . RVDK_PATCH_5
Parameters : none
Returns : void
\* ---F------------------------------------------------------------------- */
void kb_sequence::reset()
{
delseq();
curmap = stdmap;
if ( length > 0 ) length = -length;
}
// === kb_keymap methods ==================================================
// This binds a key to an action
int kb_keymap::bind(char const *seq, int action)
{
kb_sequence k;
int res = k.parse(seq);
if (!res) {
defkey(&k, action);
} else
lyxerr.debug(LString("Parse error at position " ) + res +
" in key sequence '" + seq + "'." , Error::KBMAP);
return res;
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_keymap : : lookup
Called by : [ user ] , kb_sequence : : add ( )
Purpose : look up a key press in a given keymap
Parameters : key - the keysym of the key press
mod - the modifier mask of the keypress
seq - the key - sequence retrieved so far
Returns : user defined action ; 0 for prefix key , - 1 if key not found
\* ---F------------------------------------------------------------------- */
int kb_keymap::lookup(KeySym key, unsigned int mod, kb_sequence *seq)
{
unsigned int hashval, ksym, msk1, msk0;
kb_key *tab;
//suppress modifier bits we do not handle
mod &= ModsMask;
if (!table) {
// error - no keymap defined:
seq->curmap = seq->stdmap;
seq->delseq();
return -1 ;
}
if (size < 0 ) { // --- if hash table ---
hashval = ((key&0 xff) ^ ((key>>8 )&0 xff)) % KB_HASHSIZE;
tab = htable[hashval];
if (!tab) {
seq->curmap = seq->stdmap;
seq->delseq();
return -1 ;
}
} else // --- else: linear list ---
tab = table;
// --- now search the list of keys ---
for ( ; (tab->code & 0 xffff) != NoSymbol; tab++) {
ksym = tab->code;
msk1 = tab->mod & 0 xffff;
msk0 = (tab->mod>>16 ) & 0 xffff;
if (ksym == key && (mod&~msk0) == msk1) {
// match found:
if (tab->table) {
// this is a prefix key - set new map
seq->curmap = tab->table;
return 0 ;
} else {
// final key - reset map
seq->curmap = seq->stdmap;
seq->delseq();
return tab->action; // ... and return action
}
}
}
// error - key not found:
seq->curmap = seq->stdmap;
seq->delseq();
return -1 ;
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_keymap : : print
Called by : [ user ]
Purpose : Prints all the available keysyms . RVDK_PATCH_5
Parameters : buf - string where output goes .
maxLen - available length in string , including ` \ 0 ' .
Returns : updated maxLen .
\* ---F------------------------------------------------------------------- */
int kb_keymap::print(char *buf, int maxLen) const
{
int len;
/* -----> Return when running out of string space or when keymap has no table.
Else, place a terminating newline in case no other output is generated. */
if ( maxLen <= 3 || !buf ) return maxLen;
if ( !table ) return maxLen;
*buf = '\0' ;
/* -------> Hash table. Process each of its slots recursively and return. */
if ( size < 0 ) {
for ( int ix = 0 ; (ix < KB_HASHSIZE) && (maxLen > 1 ); ix++ ) {
if ( htable[ix] ) {
len = printKeyTab( htable[ix], buf, maxLen );
maxLen -= len;
buf += len;
}
}
} else {
/* -------> Normal table. */
len = printKeyTab( table, buf, maxLen );
maxLen -= len;
buf += len;
}
return maxLen;
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_keymap : : defkey
Called by : [ user ]
Purpose : define an action for a key sequence
Parameters : seq - the key sequence
action - the action to be defined
idx - recursion depth
Returns : 0 if ok .
\* ---F------------------------------------------------------------------- */
int kb_keymap::defkey(kb_sequence *seq, int action, int idx /*=0*/)
{
int tsize;
unsigned int code, modmsk;
kb_key *tab, **ptab;
code = seq->sequence[idx];
modmsk = seq->modifiers[idx];
if (code == NoSymbol) return -1 ;
// --- get list------------------------------------------------------
if (!table) {
// If we don't have any yet, make an empty one
table = new kb_key[KB_PREALLOC];
table[0 ].code = NoSymbol;
tab = table;
ptab = &table;
size = KB_PREALLOC;
} else if (size<0 ) {
// Hash table.
int hashval = (code&0 xffff);
hashval = ((hashval&0 xff) ^ ((hashval>>8 )&0 xff)) % KB_HASHSIZE;
tab = htable[hashval];
ptab = htable+hashval;
if (!tab) {
tab = new kb_key[KB_PREALLOC];
tab[0 ].code = NoSymbol;
*ptab = tab;
}
} else {
tab = table;
ptab = &table;
}
// --- check if key is already there --------------------------------
kb_key *t;
for (t = tab, tsize=1 ; t->code != NoSymbol; t++, tsize++) {
if (code == t->code && modmsk == t->mod) { // -- overwrite binding ---
if (idx+1 == seq->length) {
char buf[20 ]; buf[0 ] = 0 ;
seq->print(buf, 20 , true );
lyxerr.debug(LString("Warning: New binding for '" ) + buf +
"' is overriding old binding..." , Error::KEY);
if (t->table) {
delete t->table;
t->table = 0 ;
}
t->action = action;
return 0 ;
} else if (!t->table) {
char buf[20 ]; buf[0 ] = 0 ;
seq->print(buf, 20 , true );
lyxerr.print(LString("Error: New binding for '" ) + buf +
"' is overriding old binding..." );
return -1 ;
} else
return t->table->defkey(seq, action, idx+1 );
}
}
// --- extend list if necessary -------------------------------------
if (tsize % KB_PREALLOC == 0 ) {
kb_key *nt = new kb_key[tsize+KB_PREALLOC];
// Set to NULL as table is used uninitialised later (thornley)
nt[tsize].table = NULL;
memcpy(nt, tab, tsize*sizeof (kb_key));
*ptab = nt;
delete [] tab;
tab = nt;
if (size>=0 ) size = tsize+KB_PREALLOC;
}
// --- add action ---------------------------------------------------
tab[tsize--].code = NoSymbol;
tab[tsize].code = code;
tab[tsize].mod = modmsk;
kb_key *newone = &tab[tsize];
// --- convert list to hash table if necessary ----------------------
if (size>=0 && tsize>=32 ) {
kb_key *oldtab = tab;
kb_key **nht = new kb_key*[KB_HASHSIZE];
for (int i = 0 ; i < KB_HASHSIZE; i++)
nht[i] = 0 ;
htable = nht;
size = -KB_HASHSIZE;
// --- copy old keys to new hash table ---
int hashval;
for (kb_key *tu = oldtab; tu->code != NoSymbol; tu++){
// copy values from oldtab to htable
hashval = (tu->code&0 xffff);
hashval = ((hashval&0 xff) ^ ((hashval>>8 )&0 xff)) % KB_HASHSIZE;
tab = htable[hashval];
if (!tab){
htable[hashval] = tab = new kb_key[KB_PREALLOC];
tab->code = NoSymbol;
}
int ts = 1 ;
for (kb_key *tt = tab; tt->code != NoSymbol; tt++)
ts++;
if (ts % KB_PREALLOC == 0 ){
// extend table
kb_key *nt = new kb_key[ts+KB_PREALLOC];
memcpy(nt, tab, ts*sizeof (kb_key));
htable[hashval] = nt;
delete [] tab;
tab = nt;
}
tab[ts--].code = NoSymbol;
tab[ts].code = tu->code;
tab[ts].mod = tu->mod;
tab[ts].action = tu->action;
tab[ts].table = tu->table;
if (tu == newone)
newone = &tab[ts];
}
delete [] oldtab;
}
// --- define rest of sequence --------------------------------------
if (idx+1 == seq->length) {
newone->action = action;
newone->table = 0 ;
return 0 ;
} else {
newone->table = new kb_keymap;
int res = newone->table->defkey(seq, action, idx+1 );
return res;
}
}
/* ---F+------------------------------------------------------------------ *\
Function : kb_keymap : : ~ kb_keymap
Called by : [ destructor ]
Purpose : free keymap and its descendents
Parameters : none
Returns : nothing
\* ---F------------------------------------------------------------------- */
kb_keymap::~kb_keymap()
{
if (!table) return ;
if (size<0 ) {
for (int i=0 ; i < KB_HASHSIZE; i++) {
if (htable[i]) {
for (kb_key *t = htable[i]; t->code != NoSymbol; t++)
if (t->table)
delete t->table;
delete htable[i];
}
}
delete htable;
} else {
for (kb_key *t = table; t->code != NoSymbol; t++)
if (t->table)
delete t->table;
delete table;
}
}
LString keyname(kb_key k) {
char buf[100 ];
printKeysym(k.code, k.mod, buf, 100 );
return buf;
}
// Finds a key for a keyaction, if possible
LString kb_keymap::findbinding(int act) const {
LString res;
if (!table)
return res;
if (size<0 ) {
for (int i=0 ; i < KB_HASHSIZE; i++) {
if (htable[i]) {
for (kb_key *t = htable[i]; t->code != NoSymbol; t++) {
if (t->table) {
LString suffix = t->table->findbinding(act);
suffix.strip(' ' );
suffix.strip(']' );
suffix.frontStrip('[' );
if (!suffix.empty()) {
res += "[" + keyname(*t) + " " + suffix + "] " ;
}
} else if (t->action == act) {
res += "[" + keyname(*t) + "] " ;
}
}
}
}
} else {
for (kb_key *t = table; t->code != NoSymbol; t++) {
if (t->table) {
LString suffix = t->table->findbinding(act);
suffix.strip(' ' );
suffix.strip(']' );
suffix.frontStrip('[' );
if (!suffix.empty()) {
res += "[" + keyname(*t) + " " + suffix + "] " ;
}
} else if (t->action == act) {
res += "[" + keyname(*t) + "] " ;
}
}
}
return res;
}
/* === End of File: kbmap.C ============================================== */
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