/*
|
/*
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* Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
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* Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
|
*
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*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
|
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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*
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* Permission is hereby granted to use or copy this program
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
|
* provided the above notices are retained, and a notice that the code was
|
* modified is included with the above copyright notice.
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* modified is included with the above copyright notice.
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*
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*
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* Author: Hans-J. Boehm (boehm@parc.xerox.com)
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* Author: Hans-J. Boehm (boehm@parc.xerox.com)
|
*/
|
*/
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/*
|
/*
|
* A really simple-minded text editor based on cords.
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* A really simple-minded text editor based on cords.
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* Things it does right:
|
* Things it does right:
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* No size bounds.
|
* No size bounds.
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* Inbounded undo.
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* Inbounded undo.
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* Shouldn't crash no matter what file you invoke it on (e.g. /vmunix)
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* Shouldn't crash no matter what file you invoke it on (e.g. /vmunix)
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* (Make sure /vmunix is not writable before you try this.)
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* (Make sure /vmunix is not writable before you try this.)
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* Scrolls horizontally.
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* Scrolls horizontally.
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* Things it does wrong:
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* Things it does wrong:
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* It doesn't handle tabs reasonably (use "expand" first).
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* It doesn't handle tabs reasonably (use "expand" first).
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* The command set is MUCH too small.
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* The command set is MUCH too small.
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* The redisplay algorithm doesn't let curses do the scrolling.
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* The redisplay algorithm doesn't let curses do the scrolling.
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* The rule for moving the window over the file is suboptimal.
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* The rule for moving the window over the file is suboptimal.
|
*/
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*/
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/* Boehm, February 6, 1995 12:27 pm PST */
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/* Boehm, February 6, 1995 12:27 pm PST */
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|
|
/* Boehm, May 19, 1994 2:20 pm PDT */
|
/* Boehm, May 19, 1994 2:20 pm PDT */
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#include <stdio.h>
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#include <stdio.h>
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#include "gc.h"
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#include "gc.h"
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#include "cord.h"
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#include "cord.h"
|
|
|
#ifdef THINK_C
|
#ifdef THINK_C
|
#define MACINTOSH
|
#define MACINTOSH
|
#include <ctype.h>
|
#include <ctype.h>
|
#endif
|
#endif
|
|
|
#if defined(__BORLANDC__) && !defined(WIN32)
|
#if defined(__BORLANDC__) && !defined(WIN32)
|
/* If this is DOS or win16, we'll fail anyway. */
|
/* If this is DOS or win16, we'll fail anyway. */
|
/* Might as well assume win32. */
|
/* Might as well assume win32. */
|
# define WIN32
|
# define WIN32
|
#endif
|
#endif
|
|
|
#if defined(WIN32)
|
#if defined(WIN32)
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# include <windows.h>
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# include <windows.h>
|
# include "de_win.h"
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# include "de_win.h"
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#elif defined(MACINTOSH)
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#elif defined(MACINTOSH)
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# include <console.h>
|
# include <console.h>
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/* curses emulation. */
|
/* curses emulation. */
|
# define initscr()
|
# define initscr()
|
# define endwin()
|
# define endwin()
|
# define nonl()
|
# define nonl()
|
# define noecho() csetmode(C_NOECHO, stdout)
|
# define noecho() csetmode(C_NOECHO, stdout)
|
# define cbreak() csetmode(C_CBREAK, stdout)
|
# define cbreak() csetmode(C_CBREAK, stdout)
|
# define refresh()
|
# define refresh()
|
# define addch(c) putchar(c)
|
# define addch(c) putchar(c)
|
# define standout() cinverse(1, stdout)
|
# define standout() cinverse(1, stdout)
|
# define standend() cinverse(0, stdout)
|
# define standend() cinverse(0, stdout)
|
# define move(line,col) cgotoxy(col + 1, line + 1, stdout)
|
# define move(line,col) cgotoxy(col + 1, line + 1, stdout)
|
# define clrtoeol() ccleol(stdout)
|
# define clrtoeol() ccleol(stdout)
|
# define de_error(s) { fprintf(stderr, s); getchar(); }
|
# define de_error(s) { fprintf(stderr, s); getchar(); }
|
# define LINES 25
|
# define LINES 25
|
# define COLS 80
|
# define COLS 80
|
#else
|
#else
|
# include <curses.h>
|
# include <curses.h>
|
# define de_error(s) { fprintf(stderr, s); sleep(2); }
|
# define de_error(s) { fprintf(stderr, s); sleep(2); }
|
#endif
|
#endif
|
#include "de_cmds.h"
|
#include "de_cmds.h"
|
|
|
/* List of line number to position mappings, in descending order. */
|
/* List of line number to position mappings, in descending order. */
|
/* There may be holes. */
|
/* There may be holes. */
|
typedef struct LineMapRep {
|
typedef struct LineMapRep {
|
int line;
|
int line;
|
size_t pos;
|
size_t pos;
|
struct LineMapRep * previous;
|
struct LineMapRep * previous;
|
} * line_map;
|
} * line_map;
|
|
|
/* List of file versions, one per edit operation */
|
/* List of file versions, one per edit operation */
|
typedef struct HistoryRep {
|
typedef struct HistoryRep {
|
CORD file_contents;
|
CORD file_contents;
|
struct HistoryRep * previous;
|
struct HistoryRep * previous;
|
line_map map; /* Invalid for first record "now" */
|
line_map map; /* Invalid for first record "now" */
|
} * history;
|
} * history;
|
|
|
history now = 0;
|
history now = 0;
|
CORD current; /* == now -> file_contents. */
|
CORD current; /* == now -> file_contents. */
|
size_t current_len; /* Current file length. */
|
size_t current_len; /* Current file length. */
|
line_map current_map = 0; /* Current line no. to pos. map */
|
line_map current_map = 0; /* Current line no. to pos. map */
|
size_t current_map_size = 0; /* Number of current_map entries. */
|
size_t current_map_size = 0; /* Number of current_map entries. */
|
/* Not always accurate, but reset */
|
/* Not always accurate, but reset */
|
/* by prune_map. */
|
/* by prune_map. */
|
# define MAX_MAP_SIZE 3000
|
# define MAX_MAP_SIZE 3000
|
|
|
/* Current display position */
|
/* Current display position */
|
int dis_line = 0;
|
int dis_line = 0;
|
int dis_col = 0;
|
int dis_col = 0;
|
|
|
# define ALL -1
|
# define ALL -1
|
# define NONE - 2
|
# define NONE - 2
|
int need_redisplay = 0; /* Line that needs to be redisplayed. */
|
int need_redisplay = 0; /* Line that needs to be redisplayed. */
|
|
|
|
|
/* Current cursor position. Always within file. */
|
/* Current cursor position. Always within file. */
|
int line = 0;
|
int line = 0;
|
int col = 0;
|
int col = 0;
|
size_t file_pos = 0; /* Character position corresponding to cursor. */
|
size_t file_pos = 0; /* Character position corresponding to cursor. */
|
|
|
/* Invalidate line map for lines > i */
|
/* Invalidate line map for lines > i */
|
void invalidate_map(int i)
|
void invalidate_map(int i)
|
{
|
{
|
while(current_map -> line > i) {
|
while(current_map -> line > i) {
|
current_map = current_map -> previous;
|
current_map = current_map -> previous;
|
current_map_size--;
|
current_map_size--;
|
}
|
}
|
}
|
}
|
|
|
/* Reduce the number of map entries to save space for huge files. */
|
/* Reduce the number of map entries to save space for huge files. */
|
/* This also affects maps in histories. */
|
/* This also affects maps in histories. */
|
void prune_map()
|
void prune_map()
|
{
|
{
|
line_map map = current_map;
|
line_map map = current_map;
|
int start_line = map -> line;
|
int start_line = map -> line;
|
|
|
current_map_size = 0;
|
current_map_size = 0;
|
for(; map != 0; map = map -> previous) {
|
for(; map != 0; map = map -> previous) {
|
current_map_size++;
|
current_map_size++;
|
if (map -> line < start_line - LINES && map -> previous != 0) {
|
if (map -> line < start_line - LINES && map -> previous != 0) {
|
map -> previous = map -> previous -> previous;
|
map -> previous = map -> previous -> previous;
|
}
|
}
|
}
|
}
|
}
|
}
|
/* Add mapping entry */
|
/* Add mapping entry */
|
void add_map(int line, size_t pos)
|
void add_map(int line, size_t pos)
|
{
|
{
|
line_map new_map = GC_NEW(struct LineMapRep);
|
line_map new_map = GC_NEW(struct LineMapRep);
|
|
|
if (current_map_size >= MAX_MAP_SIZE) prune_map();
|
if (current_map_size >= MAX_MAP_SIZE) prune_map();
|
new_map -> line = line;
|
new_map -> line = line;
|
new_map -> pos = pos;
|
new_map -> pos = pos;
|
new_map -> previous = current_map;
|
new_map -> previous = current_map;
|
current_map = new_map;
|
current_map = new_map;
|
current_map_size++;
|
current_map_size++;
|
}
|
}
|
|
|
|
|
|
|
/* Return position of column *c of ith line in */
|
/* Return position of column *c of ith line in */
|
/* current file. Adjust *c to be within the line.*/
|
/* current file. Adjust *c to be within the line.*/
|
/* A 0 pointer is taken as 0 column. */
|
/* A 0 pointer is taken as 0 column. */
|
/* Returns CORD_NOT_FOUND if i is too big. */
|
/* Returns CORD_NOT_FOUND if i is too big. */
|
/* Assumes i > dis_line. */
|
/* Assumes i > dis_line. */
|
size_t line_pos(int i, int *c)
|
size_t line_pos(int i, int *c)
|
{
|
{
|
int j;
|
int j;
|
size_t cur;
|
size_t cur;
|
size_t next;
|
size_t next;
|
line_map map = current_map;
|
line_map map = current_map;
|
|
|
while (map -> line > i) map = map -> previous;
|
while (map -> line > i) map = map -> previous;
|
if (map -> line < i - 2) /* rebuild */ invalidate_map(i);
|
if (map -> line < i - 2) /* rebuild */ invalidate_map(i);
|
for (j = map -> line, cur = map -> pos; j < i;) {
|
for (j = map -> line, cur = map -> pos; j < i;) {
|
cur = CORD_chr(current, cur, '\n');
|
cur = CORD_chr(current, cur, '\n');
|
if (cur == current_len-1) return(CORD_NOT_FOUND);
|
if (cur == current_len-1) return(CORD_NOT_FOUND);
|
cur++;
|
cur++;
|
if (++j > current_map -> line) add_map(j, cur);
|
if (++j > current_map -> line) add_map(j, cur);
|
}
|
}
|
if (c != 0) {
|
if (c != 0) {
|
next = CORD_chr(current, cur, '\n');
|
next = CORD_chr(current, cur, '\n');
|
if (next == CORD_NOT_FOUND) next = current_len - 1;
|
if (next == CORD_NOT_FOUND) next = current_len - 1;
|
if (next < cur + *c) {
|
if (next < cur + *c) {
|
*c = next - cur;
|
*c = next - cur;
|
}
|
}
|
cur += *c;
|
cur += *c;
|
}
|
}
|
return(cur);
|
return(cur);
|
}
|
}
|
|
|
void add_hist(CORD s)
|
void add_hist(CORD s)
|
{
|
{
|
history new_file = GC_NEW(struct HistoryRep);
|
history new_file = GC_NEW(struct HistoryRep);
|
|
|
new_file -> file_contents = current = s;
|
new_file -> file_contents = current = s;
|
current_len = CORD_len(s);
|
current_len = CORD_len(s);
|
new_file -> previous = now;
|
new_file -> previous = now;
|
if (now != 0) now -> map = current_map;
|
if (now != 0) now -> map = current_map;
|
now = new_file;
|
now = new_file;
|
}
|
}
|
|
|
void del_hist(void)
|
void del_hist(void)
|
{
|
{
|
now = now -> previous;
|
now = now -> previous;
|
current = now -> file_contents;
|
current = now -> file_contents;
|
current_map = now -> map;
|
current_map = now -> map;
|
current_len = CORD_len(current);
|
current_len = CORD_len(current);
|
}
|
}
|
|
|
/* Current screen_contents; a dynamically allocated array of CORDs */
|
/* Current screen_contents; a dynamically allocated array of CORDs */
|
CORD * screen = 0;
|
CORD * screen = 0;
|
int screen_size = 0;
|
int screen_size = 0;
|
|
|
# ifndef WIN32
|
# ifndef WIN32
|
/* Replace a line in the curses stdscr. All control characters are */
|
/* Replace a line in the curses stdscr. All control characters are */
|
/* displayed as upper case characters in standout mode. This isn't */
|
/* displayed as upper case characters in standout mode. This isn't */
|
/* terribly appropriate for tabs. */
|
/* terribly appropriate for tabs. */
|
void replace_line(int i, CORD s)
|
void replace_line(int i, CORD s)
|
{
|
{
|
register int c;
|
register int c;
|
CORD_pos p;
|
CORD_pos p;
|
size_t len = CORD_len(s);
|
size_t len = CORD_len(s);
|
|
|
if (screen == 0 || LINES > screen_size) {
|
if (screen == 0 || LINES > screen_size) {
|
screen_size = LINES;
|
screen_size = LINES;
|
screen = (CORD *)GC_MALLOC(screen_size * sizeof(CORD));
|
screen = (CORD *)GC_MALLOC(screen_size * sizeof(CORD));
|
}
|
}
|
# if !defined(MACINTOSH)
|
# if !defined(MACINTOSH)
|
/* A gross workaround for an apparent curses bug: */
|
/* A gross workaround for an apparent curses bug: */
|
if (i == LINES-1 && len == COLS) {
|
if (i == LINES-1 && len == COLS) {
|
s = CORD_substr(s, 0, CORD_len(s) - 1);
|
s = CORD_substr(s, 0, CORD_len(s) - 1);
|
}
|
}
|
# endif
|
# endif
|
if (CORD_cmp(screen[i], s) != 0) {
|
if (CORD_cmp(screen[i], s) != 0) {
|
move(i, 0); clrtoeol(); move(i,0);
|
move(i, 0); clrtoeol(); move(i,0);
|
|
|
CORD_FOR (p, s) {
|
CORD_FOR (p, s) {
|
c = CORD_pos_fetch(p) & 0x7f;
|
c = CORD_pos_fetch(p) & 0x7f;
|
if (iscntrl(c)) {
|
if (iscntrl(c)) {
|
standout(); addch(c + 0x40); standend();
|
standout(); addch(c + 0x40); standend();
|
} else {
|
} else {
|
addch(c);
|
addch(c);
|
}
|
}
|
}
|
}
|
screen[i] = s;
|
screen[i] = s;
|
}
|
}
|
}
|
}
|
#else
|
#else
|
# define replace_line(i,s) invalidate_line(i)
|
# define replace_line(i,s) invalidate_line(i)
|
#endif
|
#endif
|
|
|
/* Return up to COLS characters of the line of s starting at pos, */
|
/* Return up to COLS characters of the line of s starting at pos, */
|
/* returning only characters after the given column. */
|
/* returning only characters after the given column. */
|
CORD retrieve_line(CORD s, size_t pos, unsigned column)
|
CORD retrieve_line(CORD s, size_t pos, unsigned column)
|
{
|
{
|
CORD candidate = CORD_substr(s, pos, column + COLS);
|
CORD candidate = CORD_substr(s, pos, column + COLS);
|
/* avoids scanning very long lines */
|
/* avoids scanning very long lines */
|
int eol = CORD_chr(candidate, 0, '\n');
|
int eol = CORD_chr(candidate, 0, '\n');
|
int len;
|
int len;
|
|
|
if (eol == CORD_NOT_FOUND) eol = CORD_len(candidate);
|
if (eol == CORD_NOT_FOUND) eol = CORD_len(candidate);
|
len = (int)eol - (int)column;
|
len = (int)eol - (int)column;
|
if (len < 0) len = 0;
|
if (len < 0) len = 0;
|
return(CORD_substr(s, pos + column, len));
|
return(CORD_substr(s, pos + column, len));
|
}
|
}
|
|
|
# ifdef WIN32
|
# ifdef WIN32
|
# define refresh();
|
# define refresh();
|
|
|
CORD retrieve_screen_line(int i)
|
CORD retrieve_screen_line(int i)
|
{
|
{
|
register size_t pos;
|
register size_t pos;
|
|
|
invalidate_map(dis_line + LINES); /* Prune search */
|
invalidate_map(dis_line + LINES); /* Prune search */
|
pos = line_pos(dis_line + i, 0);
|
pos = line_pos(dis_line + i, 0);
|
if (pos == CORD_NOT_FOUND) return(CORD_EMPTY);
|
if (pos == CORD_NOT_FOUND) return(CORD_EMPTY);
|
return(retrieve_line(current, pos, dis_col));
|
return(retrieve_line(current, pos, dis_col));
|
}
|
}
|
# endif
|
# endif
|
|
|
/* Display the visible section of the current file */
|
/* Display the visible section of the current file */
|
void redisplay(void)
|
void redisplay(void)
|
{
|
{
|
register int i;
|
register int i;
|
|
|
invalidate_map(dis_line + LINES); /* Prune search */
|
invalidate_map(dis_line + LINES); /* Prune search */
|
for (i = 0; i < LINES; i++) {
|
for (i = 0; i < LINES; i++) {
|
if (need_redisplay == ALL || need_redisplay == i) {
|
if (need_redisplay == ALL || need_redisplay == i) {
|
register size_t pos = line_pos(dis_line + i, 0);
|
register size_t pos = line_pos(dis_line + i, 0);
|
|
|
if (pos == CORD_NOT_FOUND) break;
|
if (pos == CORD_NOT_FOUND) break;
|
replace_line(i, retrieve_line(current, pos, dis_col));
|
replace_line(i, retrieve_line(current, pos, dis_col));
|
if (need_redisplay == i) goto done;
|
if (need_redisplay == i) goto done;
|
}
|
}
|
}
|
}
|
for (; i < LINES; i++) replace_line(i, CORD_EMPTY);
|
for (; i < LINES; i++) replace_line(i, CORD_EMPTY);
|
done:
|
done:
|
refresh();
|
refresh();
|
need_redisplay = NONE;
|
need_redisplay = NONE;
|
}
|
}
|
|
|
int dis_granularity;
|
int dis_granularity;
|
|
|
/* Update dis_line, dis_col, and dis_pos to make cursor visible. */
|
/* Update dis_line, dis_col, and dis_pos to make cursor visible. */
|
/* Assumes line, col, dis_line, dis_pos are in bounds. */
|
/* Assumes line, col, dis_line, dis_pos are in bounds. */
|
void normalize_display()
|
void normalize_display()
|
{
|
{
|
int old_line = dis_line;
|
int old_line = dis_line;
|
int old_col = dis_col;
|
int old_col = dis_col;
|
|
|
dis_granularity = 1;
|
dis_granularity = 1;
|
if (LINES > 15 && COLS > 15) dis_granularity = 2;
|
if (LINES > 15 && COLS > 15) dis_granularity = 2;
|
while (dis_line > line) dis_line -= dis_granularity;
|
while (dis_line > line) dis_line -= dis_granularity;
|
while (dis_col > col) dis_col -= dis_granularity;
|
while (dis_col > col) dis_col -= dis_granularity;
|
while (line >= dis_line + LINES) dis_line += dis_granularity;
|
while (line >= dis_line + LINES) dis_line += dis_granularity;
|
while (col >= dis_col + COLS) dis_col += dis_granularity;
|
while (col >= dis_col + COLS) dis_col += dis_granularity;
|
if (old_line != dis_line || old_col != dis_col) {
|
if (old_line != dis_line || old_col != dis_col) {
|
need_redisplay = ALL;
|
need_redisplay = ALL;
|
}
|
}
|
}
|
}
|
|
|
# if defined(WIN32)
|
# if defined(WIN32)
|
# elif defined(MACINTOSH)
|
# elif defined(MACINTOSH)
|
# define move_cursor(x,y) cgotoxy(x + 1, y + 1, stdout)
|
# define move_cursor(x,y) cgotoxy(x + 1, y + 1, stdout)
|
# else
|
# else
|
# define move_cursor(x,y) move(y,x)
|
# define move_cursor(x,y) move(y,x)
|
# endif
|
# endif
|
|
|
/* Adjust display so that cursor is visible; move cursor into position */
|
/* Adjust display so that cursor is visible; move cursor into position */
|
/* Update screen if necessary. */
|
/* Update screen if necessary. */
|
void fix_cursor(void)
|
void fix_cursor(void)
|
{
|
{
|
normalize_display();
|
normalize_display();
|
if (need_redisplay != NONE) redisplay();
|
if (need_redisplay != NONE) redisplay();
|
move_cursor(col - dis_col, line - dis_line);
|
move_cursor(col - dis_col, line - dis_line);
|
refresh();
|
refresh();
|
# ifndef WIN32
|
# ifndef WIN32
|
fflush(stdout);
|
fflush(stdout);
|
# endif
|
# endif
|
}
|
}
|
|
|
/* Make sure line, col, and dis_pos are somewhere inside file. */
|
/* Make sure line, col, and dis_pos are somewhere inside file. */
|
/* Recompute file_pos. Assumes dis_pos is accurate or past eof */
|
/* Recompute file_pos. Assumes dis_pos is accurate or past eof */
|
void fix_pos()
|
void fix_pos()
|
{
|
{
|
int my_col = col;
|
int my_col = col;
|
|
|
if ((size_t)line > current_len) line = current_len;
|
if ((size_t)line > current_len) line = current_len;
|
file_pos = line_pos(line, &my_col);
|
file_pos = line_pos(line, &my_col);
|
if (file_pos == CORD_NOT_FOUND) {
|
if (file_pos == CORD_NOT_FOUND) {
|
for (line = current_map -> line, file_pos = current_map -> pos;
|
for (line = current_map -> line, file_pos = current_map -> pos;
|
file_pos < current_len;
|
file_pos < current_len;
|
line++, file_pos = CORD_chr(current, file_pos, '\n') + 1);
|
line++, file_pos = CORD_chr(current, file_pos, '\n') + 1);
|
line--;
|
line--;
|
file_pos = line_pos(line, &col);
|
file_pos = line_pos(line, &col);
|
} else {
|
} else {
|
col = my_col;
|
col = my_col;
|
}
|
}
|
}
|
}
|
|
|
#if defined(WIN32)
|
#if defined(WIN32)
|
# define beep() Beep(1000 /* Hz */, 300 /* msecs */)
|
# define beep() Beep(1000 /* Hz */, 300 /* msecs */)
|
#elif defined(MACINTOSH)
|
#elif defined(MACINTOSH)
|
# define beep() SysBeep(1)
|
# define beep() SysBeep(1)
|
#else
|
#else
|
/*
|
/*
|
* beep() is part of some curses packages and not others.
|
* beep() is part of some curses packages and not others.
|
* We try to match the type of the builtin one, if any.
|
* We try to match the type of the builtin one, if any.
|
*/
|
*/
|
#ifdef __STDC__
|
#ifdef __STDC__
|
int beep(void)
|
int beep(void)
|
#else
|
#else
|
int beep()
|
int beep()
|
#endif
|
#endif
|
{
|
{
|
putc('\007', stderr);
|
putc('\007', stderr);
|
return(0);
|
return(0);
|
}
|
}
|
#endif
|
#endif
|
|
|
# define NO_PREFIX -1
|
# define NO_PREFIX -1
|
# define BARE_PREFIX -2
|
# define BARE_PREFIX -2
|
int repeat_count = NO_PREFIX; /* Current command prefix. */
|
int repeat_count = NO_PREFIX; /* Current command prefix. */
|
|
|
int locate_mode = 0; /* Currently between 2 ^Ls */
|
int locate_mode = 0; /* Currently between 2 ^Ls */
|
CORD locate_string = CORD_EMPTY; /* Current search string. */
|
CORD locate_string = CORD_EMPTY; /* Current search string. */
|
|
|
char * arg_file_name;
|
char * arg_file_name;
|
|
|
#ifdef WIN32
|
#ifdef WIN32
|
/* Change the current position to whatever is currently displayed at */
|
/* Change the current position to whatever is currently displayed at */
|
/* the given SCREEN coordinates. */
|
/* the given SCREEN coordinates. */
|
void set_position(int c, int l)
|
void set_position(int c, int l)
|
{
|
{
|
line = l + dis_line;
|
line = l + dis_line;
|
col = c + dis_col;
|
col = c + dis_col;
|
fix_pos();
|
fix_pos();
|
move_cursor(col - dis_col, line - dis_line);
|
move_cursor(col - dis_col, line - dis_line);
|
}
|
}
|
#endif /* WIN32 */
|
#endif /* WIN32 */
|
|
|
/* Perform the command associated with character c. C may be an */
|
/* Perform the command associated with character c. C may be an */
|
/* integer > 256 denoting a windows command, one of the above control */
|
/* integer > 256 denoting a windows command, one of the above control */
|
/* characters, or another ASCII character to be used as either a */
|
/* characters, or another ASCII character to be used as either a */
|
/* character to be inserted, a repeat count, or a search string, */
|
/* character to be inserted, a repeat count, or a search string, */
|
/* depending on the current state. */
|
/* depending on the current state. */
|
void do_command(int c)
|
void do_command(int c)
|
{
|
{
|
int i;
|
int i;
|
int need_fix_pos;
|
int need_fix_pos;
|
FILE * out;
|
FILE * out;
|
|
|
if ( c == '\r') c = '\n';
|
if ( c == '\r') c = '\n';
|
if (locate_mode) {
|
if (locate_mode) {
|
size_t new_pos;
|
size_t new_pos;
|
|
|
if (c == LOCATE) {
|
if (c == LOCATE) {
|
locate_mode = 0;
|
locate_mode = 0;
|
locate_string = CORD_EMPTY;
|
locate_string = CORD_EMPTY;
|
return;
|
return;
|
}
|
}
|
locate_string = CORD_cat_char(locate_string, (char)c);
|
locate_string = CORD_cat_char(locate_string, (char)c);
|
new_pos = CORD_str(current, file_pos - CORD_len(locate_string) + 1,
|
new_pos = CORD_str(current, file_pos - CORD_len(locate_string) + 1,
|
locate_string);
|
locate_string);
|
if (new_pos != CORD_NOT_FOUND) {
|
if (new_pos != CORD_NOT_FOUND) {
|
need_redisplay = ALL;
|
need_redisplay = ALL;
|
new_pos += CORD_len(locate_string);
|
new_pos += CORD_len(locate_string);
|
for (;;) {
|
for (;;) {
|
file_pos = line_pos(line + 1, 0);
|
file_pos = line_pos(line + 1, 0);
|
if (file_pos > new_pos) break;
|
if (file_pos > new_pos) break;
|
line++;
|
line++;
|
}
|
}
|
col = new_pos - line_pos(line, 0);
|
col = new_pos - line_pos(line, 0);
|
file_pos = new_pos;
|
file_pos = new_pos;
|
fix_cursor();
|
fix_cursor();
|
} else {
|
} else {
|
locate_string = CORD_substr(locate_string, 0,
|
locate_string = CORD_substr(locate_string, 0,
|
CORD_len(locate_string) - 1);
|
CORD_len(locate_string) - 1);
|
beep();
|
beep();
|
}
|
}
|
return;
|
return;
|
}
|
}
|
if (c == REPEAT) {
|
if (c == REPEAT) {
|
repeat_count = BARE_PREFIX; return;
|
repeat_count = BARE_PREFIX; return;
|
} else if (c < 0x100 && isdigit(c)){
|
} else if (c < 0x100 && isdigit(c)){
|
if (repeat_count == BARE_PREFIX) {
|
if (repeat_count == BARE_PREFIX) {
|
repeat_count = c - '0'; return;
|
repeat_count = c - '0'; return;
|
} else if (repeat_count != NO_PREFIX) {
|
} else if (repeat_count != NO_PREFIX) {
|
repeat_count = 10 * repeat_count + c - '0'; return;
|
repeat_count = 10 * repeat_count + c - '0'; return;
|
}
|
}
|
}
|
}
|
if (repeat_count == NO_PREFIX) repeat_count = 1;
|
if (repeat_count == NO_PREFIX) repeat_count = 1;
|
if (repeat_count == BARE_PREFIX && (c == UP || c == DOWN)) {
|
if (repeat_count == BARE_PREFIX && (c == UP || c == DOWN)) {
|
repeat_count = LINES - dis_granularity;
|
repeat_count = LINES - dis_granularity;
|
}
|
}
|
if (repeat_count == BARE_PREFIX) repeat_count = 8;
|
if (repeat_count == BARE_PREFIX) repeat_count = 8;
|
need_fix_pos = 0;
|
need_fix_pos = 0;
|
for (i = 0; i < repeat_count; i++) {
|
for (i = 0; i < repeat_count; i++) {
|
switch(c) {
|
switch(c) {
|
case LOCATE:
|
case LOCATE:
|
locate_mode = 1;
|
locate_mode = 1;
|
break;
|
break;
|
case TOP:
|
case TOP:
|
line = col = file_pos = 0;
|
line = col = file_pos = 0;
|
break;
|
break;
|
case UP:
|
case UP:
|
if (line != 0) {
|
if (line != 0) {
|
line--;
|
line--;
|
need_fix_pos = 1;
|
need_fix_pos = 1;
|
}
|
}
|
break;
|
break;
|
case DOWN:
|
case DOWN:
|
line++;
|
line++;
|
need_fix_pos = 1;
|
need_fix_pos = 1;
|
break;
|
break;
|
case LEFT:
|
case LEFT:
|
if (col != 0) {
|
if (col != 0) {
|
col--; file_pos--;
|
col--; file_pos--;
|
}
|
}
|
break;
|
break;
|
case RIGHT:
|
case RIGHT:
|
if (CORD_fetch(current, file_pos) == '\n') break;
|
if (CORD_fetch(current, file_pos) == '\n') break;
|
col++; file_pos++;
|
col++; file_pos++;
|
break;
|
break;
|
case UNDO:
|
case UNDO:
|
del_hist();
|
del_hist();
|
need_redisplay = ALL; need_fix_pos = 1;
|
need_redisplay = ALL; need_fix_pos = 1;
|
break;
|
break;
|
case BS:
|
case BS:
|
if (col == 0) {
|
if (col == 0) {
|
beep();
|
beep();
|
break;
|
break;
|
}
|
}
|
col--; file_pos--;
|
col--; file_pos--;
|
/* fall through: */
|
/* fall through: */
|
case DEL:
|
case DEL:
|
if (file_pos == current_len-1) break;
|
if (file_pos == current_len-1) break;
|
/* Can't delete trailing newline */
|
/* Can't delete trailing newline */
|
if (CORD_fetch(current, file_pos) == '\n') {
|
if (CORD_fetch(current, file_pos) == '\n') {
|
need_redisplay = ALL; need_fix_pos = 1;
|
need_redisplay = ALL; need_fix_pos = 1;
|
} else {
|
} else {
|
need_redisplay = line - dis_line;
|
need_redisplay = line - dis_line;
|
}
|
}
|
add_hist(CORD_cat(
|
add_hist(CORD_cat(
|
CORD_substr(current, 0, file_pos),
|
CORD_substr(current, 0, file_pos),
|
CORD_substr(current, file_pos+1, current_len)));
|
CORD_substr(current, file_pos+1, current_len)));
|
invalidate_map(line);
|
invalidate_map(line);
|
break;
|
break;
|
case WRITE:
|
case WRITE:
|
{
|
{
|
CORD name = CORD_cat(CORD_from_char_star(arg_file_name),
|
CORD name = CORD_cat(CORD_from_char_star(arg_file_name),
|
".new");
|
".new");
|
|
|
if ((out = fopen(CORD_to_const_char_star(name), "wb")) == NULL
|
if ((out = fopen(CORD_to_const_char_star(name), "wb")) == NULL
|
|| CORD_put(current, out) == EOF) {
|
|| CORD_put(current, out) == EOF) {
|
de_error("Write failed\n");
|
de_error("Write failed\n");
|
need_redisplay = ALL;
|
need_redisplay = ALL;
|
} else {
|
} else {
|
fclose(out);
|
fclose(out);
|
}
|
}
|
}
|
}
|
break;
|
break;
|
default:
|
default:
|
{
|
{
|
CORD left_part = CORD_substr(current, 0, file_pos);
|
CORD left_part = CORD_substr(current, 0, file_pos);
|
CORD right_part = CORD_substr(current, file_pos, current_len);
|
CORD right_part = CORD_substr(current, file_pos, current_len);
|
|
|
add_hist(CORD_cat(CORD_cat_char(left_part, (char)c),
|
add_hist(CORD_cat(CORD_cat_char(left_part, (char)c),
|
right_part));
|
right_part));
|
invalidate_map(line);
|
invalidate_map(line);
|
if (c == '\n') {
|
if (c == '\n') {
|
col = 0; line++; file_pos++;
|
col = 0; line++; file_pos++;
|
need_redisplay = ALL;
|
need_redisplay = ALL;
|
} else {
|
} else {
|
col++; file_pos++;
|
col++; file_pos++;
|
need_redisplay = line - dis_line;
|
need_redisplay = line - dis_line;
|
}
|
}
|
break;
|
break;
|
}
|
}
|
}
|
}
|
}
|
}
|
if (need_fix_pos) fix_pos();
|
if (need_fix_pos) fix_pos();
|
fix_cursor();
|
fix_cursor();
|
repeat_count = NO_PREFIX;
|
repeat_count = NO_PREFIX;
|
}
|
}
|
|
|
/* OS independent initialization */
|
/* OS independent initialization */
|
|
|
void generic_init(void)
|
void generic_init(void)
|
{
|
{
|
FILE * f;
|
FILE * f;
|
CORD initial;
|
CORD initial;
|
|
|
if ((f = fopen(arg_file_name, "rb")) == NULL) {
|
if ((f = fopen(arg_file_name, "rb")) == NULL) {
|
initial = "\n";
|
initial = "\n";
|
} else {
|
} else {
|
initial = CORD_from_file(f);
|
initial = CORD_from_file(f);
|
if (initial == CORD_EMPTY
|
if (initial == CORD_EMPTY
|
|| CORD_fetch(initial, CORD_len(initial)-1) != '\n') {
|
|| CORD_fetch(initial, CORD_len(initial)-1) != '\n') {
|
initial = CORD_cat(initial, "\n");
|
initial = CORD_cat(initial, "\n");
|
}
|
}
|
}
|
}
|
add_map(0,0);
|
add_map(0,0);
|
add_hist(initial);
|
add_hist(initial);
|
now -> map = current_map;
|
now -> map = current_map;
|
now -> previous = now; /* Can't back up further: beginning of the world */
|
now -> previous = now; /* Can't back up further: beginning of the world */
|
need_redisplay = ALL;
|
need_redisplay = ALL;
|
fix_cursor();
|
fix_cursor();
|
}
|
}
|
|
|
#ifndef WIN32
|
#ifndef WIN32
|
|
|
main(argc, argv)
|
main(argc, argv)
|
int argc;
|
int argc;
|
char ** argv;
|
char ** argv;
|
{
|
{
|
int c;
|
int c;
|
|
|
#if defined(MACINTOSH)
|
#if defined(MACINTOSH)
|
console_options.title = "\pDumb Editor";
|
console_options.title = "\pDumb Editor";
|
cshow(stdout);
|
cshow(stdout);
|
argc = ccommand(&argv);
|
argc = ccommand(&argv);
|
#endif
|
#endif
|
GC_INIT();
|
GC_INIT();
|
|
|
if (argc != 2) goto usage;
|
if (argc != 2) goto usage;
|
arg_file_name = argv[1];
|
arg_file_name = argv[1];
|
setvbuf(stdout, GC_MALLOC_ATOMIC(8192), _IOFBF, 8192);
|
setvbuf(stdout, GC_MALLOC_ATOMIC(8192), _IOFBF, 8192);
|
initscr();
|
initscr();
|
noecho(); nonl(); cbreak();
|
noecho(); nonl(); cbreak();
|
generic_init();
|
generic_init();
|
while ((c = getchar()) != QUIT) {
|
while ((c = getchar()) != QUIT) {
|
if (c == EOF) break;
|
if (c == EOF) break;
|
do_command(c);
|
do_command(c);
|
}
|
}
|
done:
|
done:
|
move(LINES-1, 0);
|
move(LINES-1, 0);
|
clrtoeol();
|
clrtoeol();
|
refresh();
|
refresh();
|
nl();
|
nl();
|
echo();
|
echo();
|
endwin();
|
endwin();
|
exit(0);
|
exit(0);
|
usage:
|
usage:
|
fprintf(stderr, "Usage: %s file\n", argv[0]);
|
fprintf(stderr, "Usage: %s file\n", argv[0]);
|
fprintf(stderr, "Cursor keys: ^B(left) ^F(right) ^P(up) ^N(down)\n");
|
fprintf(stderr, "Cursor keys: ^B(left) ^F(right) ^P(up) ^N(down)\n");
|
fprintf(stderr, "Undo: ^U Write to <file>.new: ^W");
|
fprintf(stderr, "Undo: ^U Write to <file>.new: ^W");
|
fprintf(stderr, "Quit:^D Repeat count: ^R[n]\n");
|
fprintf(stderr, "Quit:^D Repeat count: ^R[n]\n");
|
fprintf(stderr, "Top: ^T Locate (search, find): ^L text ^L\n");
|
fprintf(stderr, "Top: ^T Locate (search, find): ^L text ^L\n");
|
exit(1);
|
exit(1);
|
}
|
}
|
|
|
#endif /* !WIN32 */
|
#endif /* !WIN32 */
|
|
|
