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/*
Copyright (C) 2002 Paul Wilkins
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* editor.c by Paul Wilkins 3/24/97 */
#include <stdio.h>
#include "editor.h"
#include "funcs.h"
#include "mode.h"
#define EDIT_BUF_LEN 1024
char Ebuf[EDIT_BUF_LEN]; /* the edit buffer */
char * Epos = Ebuf; /* current cursor position */
char * Eend = Ebuf; /* end of the line */
int isEditingEditor(){
if(Ebuf == Eend) return 0;
return 1;
}
int cursorPosEditor(){
return (int)(Epos-Ebuf);
}
void setCursorPosEditor(int pos){
if(pos < 0){
Epos = Ebuf;
} else if(pos > Eend-Ebuf){
Epos = Eend;
} else {
Epos = Ebuf + pos;
}
}
char getPrevEditor(){
if(Epos < Ebuf+1) return '\0';
return *(Epos-1);
}
char * getLineEditor(){
*Eend = '\0';
return Ebuf;
}
/* process anything in the edit buffer */
void finishEditor(){
if(Eend > Ebuf){
*Eend = '\0';
readLine(Ebuf);
}
Epos = Eend = Ebuf;
}
void insertEditor(char c){
char *p;
for(p=Eend; p>=Epos; p--) *(p+1) = *p;
*Epos = c;
Epos++;
Eend++;
/* check for buffer overrun- leave 1 byte for '\0' */
if(Eend >= Ebuf + EDIT_BUF_LEN - 2) Eend = Ebuf + EDIT_BUF_LEN - 2;
if(Epos >= Ebuf + EDIT_BUF_LEN - 2) Epos = Ebuf + EDIT_BUF_LEN - 3;
}
void deleteEditor(){
char *p;
if(Epos == Ebuf) return;
for(p=Epos; p<Eend; p++) *(p-1) = *p;
Epos--; Eend--;
}
void homeEditor(){
Epos = Ebuf;
}
void endEditor(){
Epos = Eend;
}
void rightEditor(){
Epos++;
if(Epos > Eend) Epos = Eend;
}
void leftEditor(){
Epos--;
if(Epos < Ebuf) Epos = Ebuf;
}
void cancelEditor(){
Eend = Epos = Ebuf;
*Ebuf = '\0';
}
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