2007-07-05 16:02:19 +00:00
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/*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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2007-11-08 11:01:52 +00:00
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/**
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* @file
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* @brief A tiny editor implementation
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*/
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2007-07-05 16:01:41 +00:00
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#include <common.h>
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#include <command.h>
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#include <malloc.h>
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#include <fs.h>
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#include <linux/ctype.h>
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#include <fcntl.h>
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2007-07-05 16:01:42 +00:00
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#include <readkey.h>
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2007-07-05 16:01:41 +00:00
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#include <errno.h>
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2007-07-05 16:01:42 +00:00
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#include <xfuncs.h>
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2007-07-05 16:02:10 +00:00
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#include <linux/stat.h>
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2007-07-05 16:01:41 +00:00
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#define TABSPACE 8
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struct line {
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int length;
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struct line *next;
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struct line *prev;
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char *data;
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};
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static struct line *buffer;
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static struct line *lastscrline;
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static int screenwidth = 80;
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static int screenheight = 25;
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2007-07-05 16:02:04 +00:00
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static int cursx = 0; /* position on screen */
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2007-07-05 16:01:41 +00:00
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static int cursy = 0;
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2007-07-05 16:02:04 +00:00
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static int textx = 0; /* position in text */
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2007-07-05 16:01:41 +00:00
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static struct line *curline; /* line where the cursor is */
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static struct line *scrline; /* the first line on screen */
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2010-10-15 07:33:32 +00:00
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static int scrcol = 0; /* the first column on screen */
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2007-07-05 16:01:41 +00:00
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static void pos(int x, int y)
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{
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printf("%c[%d;%dH", 27, y + 1, x + 1);
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}
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static char *screenline(char *line, int *pos)
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{
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int i, outpos = 0;
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static char lbuf[1024];
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memset(lbuf, 0, 1024);
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if (!line) {
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lbuf[0] = '~';
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return lbuf;
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}
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for (i = 0; outpos < 1024; i++) {
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if (i == textx && pos)
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*pos = outpos;
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if (!line[i])
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break;
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if (line[i] == '\t') {
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lbuf[outpos++] = ' ';
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while (outpos % TABSPACE)
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lbuf[outpos++] = ' ';
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continue;
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}
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lbuf[outpos++] = line[i];
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}
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return lbuf;
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}
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2007-07-05 16:01:55 +00:00
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static int setpos(char *line, int position)
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2007-07-05 16:01:41 +00:00
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{
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int i = 0;
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int linepos = 0;
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while(line[linepos]) {
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if (line[linepos] == '\t')
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while ((i + 1) % TABSPACE)
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i++;
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if (i >= position)
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return linepos;
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linepos++;
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i++;
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}
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return linepos;
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}
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static void refresh_line(struct line *line, int ypos)
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{
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char *str = screenline(line->data, NULL) + scrcol;
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pos(0, ypos);
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str[screenwidth] = 0;
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2007-07-05 16:01:59 +00:00
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printf("%s%c[K", str, 27);
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2007-07-05 16:01:41 +00:00
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pos(cursx, cursy);
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}
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2007-10-16 20:35:42 +00:00
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/*
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* Most sane terminal programs can do ansi screen scrolling.
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* Unfortunately one of the most popular programs cannot:
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* minicom.
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* Grmpf!
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*/
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static int smartscroll = 0;
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2007-07-05 16:01:41 +00:00
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static void refresh(int full)
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{
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int i;
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struct line *l = scrline;
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if (!full) {
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2007-10-16 20:35:42 +00:00
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if (smartscroll) {
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if (scrline->next == lastscrline) {
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printf("%c[1T", 27);
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refresh_line(scrline, 0);
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pos(0, screenheight);
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printf("%*s", screenwidth, "");
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return;
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}
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2007-07-05 16:01:41 +00:00
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2007-10-16 20:35:42 +00:00
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if (scrline->prev == lastscrline) {
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printf("%c[1S", 27);
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for (i = 0; i < screenheight - 1; i++) {
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l = l->next;
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if (!l)
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return;
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}
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refresh_line(l, screenheight - 1);
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return;
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2007-07-05 16:01:41 +00:00
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}
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2007-10-16 20:35:42 +00:00
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} else {
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refresh(1);
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2007-07-05 16:01:41 +00:00
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return;
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}
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}
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for (i = 0; i < screenheight; i++) {
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refresh_line(l, i);
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l = l->next;
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if (!l)
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break;
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}
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2007-07-05 16:01:42 +00:00
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i++;
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2007-07-05 16:01:41 +00:00
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while (i < screenheight) {
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pos(0, i++);
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2007-07-05 16:01:59 +00:00
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printf("~");
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2007-07-05 16:01:41 +00:00
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}
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}
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static void line_free(struct line *line)
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{
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free(line->data);
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free(line);
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}
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static struct line *line_realloc(int len, struct line *line)
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{
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int size = 32;
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if (!line) {
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2007-07-05 16:01:42 +00:00
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line = xzalloc(sizeof(struct line));
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2007-07-05 16:01:41 +00:00
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line->data = malloc(32);
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}
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2007-07-05 16:02:10 +00:00
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while (size < len)
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2007-07-05 16:01:41 +00:00
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size <<= 1;
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2007-09-27 14:28:26 +00:00
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line->data = xrealloc(line->data, size);
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2007-07-05 16:01:41 +00:00
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return line;
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}
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2007-07-05 16:02:10 +00:00
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static int edit_read_file(const char *path)
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2007-07-05 16:01:41 +00:00
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{
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struct line *line;
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struct line *lastline = NULL;
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2007-07-05 16:02:10 +00:00
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char *filebuffer;
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2007-07-13 18:42:18 +00:00
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char *linestr, *lineend;
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2007-07-05 16:02:10 +00:00
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struct stat s;
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if (!stat(path, &s)) {
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2007-09-27 14:33:35 +00:00
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filebuffer = read_file(path, NULL);
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2007-07-05 16:02:10 +00:00
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if (!filebuffer) {
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printf("could not read %s: %s\n", path, errno_str());
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return -1;
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}
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2007-07-05 16:01:41 +00:00
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2007-07-13 18:42:18 +00:00
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linestr = filebuffer;
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while (1) {
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if (!*linestr)
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break;
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lineend = strchr(linestr, '\n');
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if (!lineend && !*linestr)
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break;
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2007-09-13 10:56:29 +00:00
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if (lineend)
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*lineend = 0;
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2007-07-05 16:02:10 +00:00
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line = line_realloc(strlen(linestr) + 1, NULL);
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if (!buffer)
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buffer = line;
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memcpy(line->data, linestr, strlen(linestr) + 1);
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line->prev = lastline;
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if (lastline)
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lastline->next = line;
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2010-10-15 06:23:14 +00:00
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line->next = NULL;
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2007-07-05 16:02:10 +00:00
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lastline = line;
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2007-07-13 18:42:18 +00:00
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if (!lineend)
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break;
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2008-04-04 09:46:55 +00:00
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linestr = lineend + 1;
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2007-07-05 16:01:41 +00:00
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}
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2007-07-13 18:42:18 +00:00
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free(filebuffer);
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2007-07-05 16:01:41 +00:00
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}
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2007-07-05 16:01:42 +00:00
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if (!buffer) {
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buffer = line_realloc(0, NULL);
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buffer->data[0] = 0;
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}
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return 0;
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}
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2007-07-13 18:42:18 +00:00
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static void free_buffer(void)
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{
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struct line *line, *tmp;
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line = buffer;
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while(line) {
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tmp = line->next;
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line_free(line);
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line = tmp;
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}
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}
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2007-07-05 16:01:42 +00:00
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static int save_file(const char *path)
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{
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struct line *line, *tmp;
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2007-07-05 16:02:10 +00:00
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int fd;
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2007-07-05 16:01:42 +00:00
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2007-07-05 16:02:10 +00:00
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fd = open(path, O_WRONLY | O_TRUNC | O_CREAT);
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if (fd < 0) {
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printf("could not open file for writing: %s\n", errno_str());
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return -1;
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}
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2007-07-05 16:01:42 +00:00
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line = buffer;
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while(line) {
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tmp = line->next;
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2007-07-05 16:02:10 +00:00
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write(fd, line->data, strlen(line->data));
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write(fd, "\n", 1);
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2007-07-05 16:01:42 +00:00
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line = tmp;
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}
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2007-07-05 16:02:10 +00:00
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close(fd);
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2007-07-05 16:01:41 +00:00
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return 0;
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}
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static void insert_char(char c)
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{
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int pos = textx;
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2007-09-27 14:27:20 +00:00
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char *line;
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int end = strlen(curline->data);
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2007-07-05 16:01:41 +00:00
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line_realloc(strlen(curline->data) + 2, curline);
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2007-09-27 14:27:20 +00:00
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line = curline->data;
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2007-07-05 16:01:41 +00:00
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while (end >= pos) {
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line[end + 1] = line[end];
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end--;
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}
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line[pos] = c;
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textx++;
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refresh_line(curline, cursy);
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}
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static void delete_char(int pos)
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{
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char *line = curline->data;
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int end = strlen(line);
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while (pos < end) {
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line[pos] = line[pos + 1];
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pos++;
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}
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refresh_line(curline, cursy);
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}
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static void split_line(void)
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{
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int length = strlen(curline->data + textx);
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struct line *newline = line_realloc(length + 1, NULL);
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struct line *tmp;
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memcpy(newline->data, curline->data + textx, length + 1);
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curline->data[textx] = 0;
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tmp = curline->next;
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curline->next = newline;
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newline->prev = curline;
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newline->next = tmp;
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if (tmp)
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tmp->prev = newline;
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textx = 0;
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cursy++;
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curline = curline->next;
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refresh(1);
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}
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static void merge_line(struct line *line)
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{
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struct line *tmp;
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line_realloc(strlen(line->data) + strlen(line->next->data) + 1, line);
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tmp = line->next;
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line->next = line->next->next;
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if (line->next)
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line->next->prev = line;
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strcat(line->data, tmp->data);
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line_free(tmp);
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refresh(1);
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}
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2007-07-05 16:02:04 +00:00
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/* not a good idea on slow serial lines */
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2007-07-05 16:01:54 +00:00
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/* #define GETWINSIZE */
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2007-07-05 16:01:42 +00:00
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#ifdef GETWINSIZE
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2007-07-05 16:01:41 +00:00
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static void getwinsize(void) {
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int y, yy = 25, xx = 80, i, n, r;
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char buf[100];
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char *endp;
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|
|
for (y = 25; y < 320; y++) {
|
|
|
|
pos(y, y);
|
|
|
|
printf("%c[6n", 27);
|
|
|
|
i = 0;
|
|
|
|
while ((r = getc()) != 'R') {
|
|
|
|
buf[i] = r;
|
|
|
|
i++;
|
|
|
|
}
|
|
|
|
n = simple_strtoul(buf + 2, &endp, 10);
|
|
|
|
if (n == y + 1)
|
|
|
|
yy = y + 1;
|
|
|
|
n = simple_strtoul(endp + 1, NULL, 10);
|
|
|
|
if (n == y + 1)
|
|
|
|
xx = y + 1;
|
|
|
|
}
|
|
|
|
pos(0,0);
|
2007-07-05 16:01:42 +00:00
|
|
|
screenheight = yy;
|
|
|
|
screenwidth = xx;
|
2007-07-05 16:01:54 +00:00
|
|
|
printf("%d %d\n", xx, yy);
|
|
|
|
mdelay(1000);
|
2007-07-05 16:01:41 +00:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2010-01-04 09:21:11 +00:00
|
|
|
static int do_edit(struct command * cmdtp, int argc, char *argv[])
|
2007-07-05 16:01:41 +00:00
|
|
|
{
|
|
|
|
int lastscrcol;
|
|
|
|
int i;
|
|
|
|
int linepos;
|
2009-12-18 10:26:12 +00:00
|
|
|
int c;
|
2007-07-05 16:01:41 +00:00
|
|
|
|
2009-10-17 10:44:19 +00:00
|
|
|
if (argc != 2)
|
|
|
|
return COMMAND_ERROR_USAGE;
|
2007-10-04 10:38:40 +00:00
|
|
|
|
2010-07-01 14:59:22 +00:00
|
|
|
/* check if we are called as "sedit" instead of "edit" */
|
2007-10-16 20:35:42 +00:00
|
|
|
if (*argv[0] == 's')
|
|
|
|
smartscroll = 1;
|
|
|
|
|
2007-07-05 16:01:41 +00:00
|
|
|
buffer = NULL;
|
2007-07-05 16:02:10 +00:00
|
|
|
if(edit_read_file(argv[1]))
|
2007-07-05 16:01:42 +00:00
|
|
|
return 1;
|
|
|
|
|
|
|
|
#ifdef GETWINSIZE
|
|
|
|
getwinsize();
|
|
|
|
#endif
|
|
|
|
|
2007-07-05 16:01:41 +00:00
|
|
|
cursx = 0;
|
|
|
|
cursy = 0;
|
|
|
|
textx = 0;
|
|
|
|
scrcol = 0;
|
|
|
|
curline = buffer;
|
|
|
|
scrline = curline;
|
|
|
|
lastscrline = scrline;
|
|
|
|
lastscrcol = 0;
|
|
|
|
|
|
|
|
printf("%c[2J", 27);
|
|
|
|
refresh(1);
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
int curlen = strlen(curline->data);
|
|
|
|
|
|
|
|
if (textx > curlen)
|
|
|
|
textx = curlen;
|
|
|
|
if (textx < 0)
|
|
|
|
textx = 0;
|
|
|
|
|
|
|
|
screenline(curline->data, &linepos);
|
|
|
|
|
|
|
|
if (linepos > scrcol + screenwidth)
|
|
|
|
scrcol = linepos - screenwidth;
|
|
|
|
|
|
|
|
if (scrcol > linepos)
|
|
|
|
scrcol = linepos;
|
|
|
|
|
|
|
|
cursx = linepos - scrcol;
|
|
|
|
|
|
|
|
while (cursy >= screenheight) {
|
|
|
|
cursy--;
|
|
|
|
scrline = scrline->next;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (cursy < 0) {
|
|
|
|
cursy++;
|
|
|
|
scrline = scrline->prev;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (scrline != lastscrline || scrcol != lastscrcol)
|
|
|
|
refresh(0);
|
|
|
|
|
|
|
|
lastscrcol = scrcol;
|
|
|
|
lastscrline = scrline;
|
|
|
|
pos(cursx, cursy);
|
|
|
|
|
2007-07-05 16:01:42 +00:00
|
|
|
c = read_key();
|
2007-07-05 16:01:41 +00:00
|
|
|
switch (c) {
|
2007-07-05 16:01:42 +00:00
|
|
|
case KEY_UP:
|
2007-07-05 16:01:41 +00:00
|
|
|
if (!curline->prev)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
curline = curline->prev;
|
|
|
|
cursy--;
|
|
|
|
textx = setpos(curline->data, linepos);
|
|
|
|
break;
|
2007-07-05 16:01:42 +00:00
|
|
|
case KEY_DOWN:
|
2007-07-05 16:01:41 +00:00
|
|
|
if (!curline->next)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
curline = curline->next;
|
|
|
|
cursy++;
|
|
|
|
textx = setpos(curline->data, linepos);
|
|
|
|
break;
|
2007-07-05 16:01:42 +00:00
|
|
|
case KEY_RIGHT:
|
2007-07-05 16:01:41 +00:00
|
|
|
textx++;
|
|
|
|
break;
|
2007-07-05 16:01:42 +00:00
|
|
|
case KEY_LEFT:
|
2007-07-05 16:01:41 +00:00
|
|
|
textx--;
|
|
|
|
break;
|
2007-07-05 16:01:42 +00:00
|
|
|
case KEY_HOME:
|
2007-07-05 16:01:41 +00:00
|
|
|
textx = 0;
|
|
|
|
break;
|
2007-07-05 16:01:42 +00:00
|
|
|
case KEY_END:
|
2007-07-05 16:01:41 +00:00
|
|
|
textx = curlen;
|
|
|
|
break;
|
2007-07-05 16:01:42 +00:00
|
|
|
case KEY_PAGEUP:
|
2007-07-05 16:01:41 +00:00
|
|
|
for (i = 0; i < screenheight - 1; i++) {
|
|
|
|
if (!curline->prev)
|
|
|
|
break;
|
|
|
|
cursy--;
|
|
|
|
curline = curline->prev;
|
|
|
|
}
|
|
|
|
textx = setpos(curline->data, linepos);
|
|
|
|
break;
|
2007-07-05 16:01:42 +00:00
|
|
|
case KEY_PAGEDOWN:
|
2007-07-05 16:01:41 +00:00
|
|
|
for (i = 0; i < screenheight - 1; i++) {
|
|
|
|
if (!curline->next)
|
|
|
|
break;
|
|
|
|
cursy++;
|
|
|
|
curline = curline->next;
|
|
|
|
}
|
|
|
|
textx = setpos(curline->data, linepos);
|
|
|
|
break;
|
2007-07-05 16:01:42 +00:00
|
|
|
case KEY_DEL:
|
2007-07-05 16:01:41 +00:00
|
|
|
if (textx == curlen) {
|
|
|
|
if (curline->next)
|
|
|
|
merge_line(curline);
|
|
|
|
} else
|
|
|
|
delete_char(textx);
|
|
|
|
break;
|
|
|
|
case 13:
|
|
|
|
case 10:
|
|
|
|
split_line();
|
|
|
|
break;
|
|
|
|
case 127:
|
2007-10-04 16:36:24 +00:00
|
|
|
case 8:
|
2007-07-05 16:01:41 +00:00
|
|
|
if (textx > 0) {
|
|
|
|
textx--;
|
|
|
|
delete_char(textx);
|
|
|
|
} else {
|
|
|
|
if (!curline->prev)
|
|
|
|
break;
|
|
|
|
curline = curline->prev;
|
|
|
|
cursy--;
|
|
|
|
textx = strlen(curline->data);
|
|
|
|
merge_line(curline);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 4:
|
2007-07-05 16:01:42 +00:00
|
|
|
save_file(argv[1]);
|
2007-07-05 16:01:41 +00:00
|
|
|
goto out;
|
|
|
|
case 3:
|
|
|
|
goto out;
|
|
|
|
default:
|
|
|
|
if ((signed char)c != -1)
|
|
|
|
insert_char(c);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
out:
|
2007-07-13 18:42:18 +00:00
|
|
|
free_buffer();
|
2007-07-05 16:01:42 +00:00
|
|
|
printf("%c[2J", 27);
|
2007-07-13 18:42:18 +00:00
|
|
|
printf("\n");
|
2007-07-05 16:01:41 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-04-04 09:46:55 +00:00
|
|
|
static const char *edit_aliases[] = { "sedit", NULL};
|
2007-10-16 20:35:42 +00:00
|
|
|
|
2008-04-04 09:46:55 +00:00
|
|
|
static const __maybe_unused char cmd_edit_help[] =
|
2007-10-16 20:35:42 +00:00
|
|
|
"Usage: (s)edit <file>\n"
|
2007-07-05 16:01:57 +00:00
|
|
|
"This is a very small editor. Its only features are moving the cursor with\n"
|
|
|
|
"the usual keys and typing characters.\n"
|
|
|
|
"<ctrl-c> quits the editor without saving,\n"
|
2007-10-16 20:35:42 +00:00
|
|
|
"<ctrl-d> quits the editor with saving the current file.\n"
|
|
|
|
"\n"
|
|
|
|
"If called as sedit the editor uses ansi codes to scroll the screen.\n";
|
2007-07-05 16:01:57 +00:00
|
|
|
|
2008-04-04 09:46:55 +00:00
|
|
|
static const __maybe_unused char cmd_edit_usage[] = "edit a file";
|
|
|
|
|
2009-12-15 08:11:09 +00:00
|
|
|
BAREBOX_CMD_START(edit)
|
2007-07-05 16:01:52 +00:00
|
|
|
.cmd = do_edit,
|
2007-10-16 20:35:42 +00:00
|
|
|
.aliases = edit_aliases,
|
2008-04-04 09:46:55 +00:00
|
|
|
.usage = cmd_edit_usage,
|
2009-12-15 08:11:09 +00:00
|
|
|
BAREBOX_CMD_HELP(cmd_edit_help)
|
|
|
|
BAREBOX_CMD_END
|
2007-11-08 11:01:52 +00:00
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @page edit_command edit (editor)
|
|
|
|
*
|
|
|
|
* Usage is: [s]edit \<file\>
|
|
|
|
*
|
|
|
|
* This is a very small editor. It's only features are moving the cursor with
|
|
|
|
* the usual keys and typing characters.
|
|
|
|
*
|
|
|
|
* \b \<ctrl-c\> quits the editor without saving,\n
|
|
|
|
* \b \<ctrl-d\> quits the editor with saving the current file.
|
|
|
|
*
|
|
|
|
* If called as \c sedit the editor uses ansi codes to scroll the screen.
|
|
|
|
*/
|