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tty_term/ncurses_and_readline.c

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/*
* This file is part of the ttyterm project.
* Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
// based on https://stackoverflow.com/a/28709979/1965803 ->
// https://github.com/ulfalizer/readline-and-ncurses
// Copyright (c) 2015-2019, Ulf Magnusson
// SPDX-License-Identifier: ISC
#include <curses.h>
#include <readline/history.h>
#include <readline/readline.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
//#include <signal.h>
#include "dbg.h"
#include "ttysocket.h"
#include "ncurses_and_readline.h"
#include "popup_msg.h"
#include "string_functions.h"
enum { // using colors
BKG_NO = 1, // normal status string
BKGMARKED_NO, // marked status string
NORMAL_NO, // normal output
MARKED_NO, // marked output
ERROR_NO // error displayed
};
#define COLOR(x) COLOR_PAIR(x ## _NO)
// Keeps track of the terminal mode so we can reset the terminal if needed on errors
static bool visual_mode = false;
// insert commands when true; roll upper screen when false
static bool insert_mode = true;
static bool should_exit = false;
static disptype disp_type = DISP_TEXT; // type of displaying data
static disptype input_type = DISP_TEXT; // parsing type of input data
const char *dispnames[DISP_SIZE] = {"TEXT", "RAW", "HEX", "RTU (RAW)", "RTU (HEX)", "Error"};
static chardevice *dtty = NULL;
static void fail_exit(const char *msg){
// Make sure endwin() is only called in visual mode. As a note, calling it
// twice does not seem to be supported and messed with the cursor position.
if(visual_mode) endwin();
fprintf(stderr, "%s\n", msg);
exit(EXIT_FAILURE);
}
static WINDOW *msg_win; // Message window
static WINDOW *sep_win; // Separator line above the command (readline) window
static WINDOW *cmd_win; // Command (readline) window
// amount of lines in line_arary
//#define LINEARRSZ (BUFSIZ/100)
#define LINEARRSZ 3
// formatted buffer initial size
#define FBUFSIZ 30
// raw buffer initial size
#define RBUFSIZ 30
// amount of spaces and delimeters in hexview string (address + 2 lines + 3 additional spaces)
#define HEXDSPACES (13)
// maximal columns in line
#define MAXCOLS (512)
typedef struct{
char *formatted_buffer; // formatted buffer, ptrtobuf(i) returns i'th string
size_t fbuf_size; // size of `formatted_buffer` in bytes (zero-terminated lines)
size_t fbuf_curr; // current size of data in buffer
size_t *line_array_idx; // indexes of starting symbols of each line in `formatted_buffer`
size_t lnarr_size; // full size of `line_array_idx`
size_t lnarr_curr; // current index in `line_array_idx` (last string)
size_t linelen; // max length of one line (excluding terminated 0)
size_t lastlen; // length of last string
} linebuf_t;
static linebuf_t *linebuffer = NULL; // string buffer for current representation
static uint8_t *raw_buffer = NULL; // raw buffer for incoming data
static size_t rawbufsz = 0, rawbufcur = 0; // full raw buffer size and current bytes amount
static size_t firstdisplineno = 0; // current first displayed line number (when scrolling)
static unsigned char input; // Input character for readline
// Used to signal "no more input" after feeding a character to readline
static bool input_avail = false;
// Not bothering with 'input_avail' and just returning 0 here seems to do the
// right thing too, but this might be safer across readline versions
static int readline_input_avail(){
return input_avail;
}
static int readline_getc(__attribute__((__unused__)) FILE *dummy){
input_avail = false;
return input;
}
static void forward_to_readline(char c){
input = c;
input_avail = true;
rl_callback_read_char();
}
/**
* @brief show_err - show error on status string
* @param text - text to display
*/
static void show_err(const char *text){
wclear(sep_win);
wattron(sep_win, COLOR(ERROR));
wprintw(sep_win, "%s", text);
wattroff(sep_win, COLOR(ERROR));
wrefresh(sep_win);
}
/**
* @brief ptrtobuf - get n'th string of `formatted_buffer`
* @param lineno - line number
* @return pointer to n'th string in formatted buffer
*/
static char *ptrtobuf(size_t lineno){
if(!linebuffer->line_array_idx){
show_err("line_array_idx not inited");
return NULL;
}
if(lineno > linebuffer->lnarr_curr) return NULL;
size_t idx = linebuffer->line_array_idx[lineno];
if(idx > linebuffer->fbuf_curr) return NULL;
return (linebuffer->formatted_buffer + idx);
}
#if 0
// functions to modify output data
static char *text_putchar(char *next){
char c = *next++;
DBG("put 0x%02X (%c)", c, c);
if(c < 31 || c > 126){
wattron(msg_win, COLOR(MARKED));
//waddch(msg_win, c);
wprintw(msg_win, "%02X", (uint8_t)c);
wattroff(msg_win, COLOR(MARKED));
}else{
//wprintw(msg_win, "%c" COLOR_GREEN "green" COLOR_RED "red" COLOR_OLD, c);
waddch(msg_win, c);
}
return next;
}
static char *raw_putchar(char *next){
waddch(msg_win, *next);
return next+1;
}
static char *hex_putchar(char *next){
waddch(msg_win, *next);
return next+1;
}
#endif
/**
* @brief msg_win_redisplay - redisplay message window
* @param group_refresh - true for grouping refresh (don't call doupdate())
*/
static void msg_win_redisplay(bool group_refresh){
if(!linebuffer) return;
werase(msg_win);
int linemax = LINES - 2;
if(firstdisplineno >= linebuffer->lnarr_curr){
size_t l = (linemax > 1) ? linemax / 2 : 1;
if(linebuffer->lnarr_curr < l) firstdisplineno = 0;
else firstdisplineno = linebuffer->lnarr_curr - l;
}
size_t lastl = firstdisplineno + linemax;
if(lastl > linebuffer->lnarr_curr+1) lastl = linebuffer->lnarr_curr+1;
int i = 0;
for(size_t curline = firstdisplineno; curline < lastl; ++curline, ++i){
mvwprintw(msg_win, i, 0, "%s", linebuffer->formatted_buffer + linebuffer->line_array_idx[curline]);
}
if(group_refresh) wnoutrefresh(msg_win);
else wrefresh(msg_win);
}
/**
* @brief cmd_win_redisplay - redisplay command (input) window
* @param group_refresh - true for grouping refresh (don't call doupdate())
*/
static void cmd_win_redisplay(bool group_refresh){
int cursor_col = 3 + strlen(dispnames[input_type]) + rl_point; // " > " width is 3
werase(cmd_win);
int x = 0, maxw = COLS-2;
if(cursor_col > maxw){
x = cursor_col - maxw;
cursor_col = maxw;
}
char abuf[4096];
snprintf(abuf, 4096, "%s > %s", dispnames[input_type], rl_line_buffer);
waddstr(cmd_win, abuf+x);
wmove(cmd_win, 0, cursor_col);
if(group_refresh) wnoutrefresh(cmd_win);
else wrefresh(cmd_win);
keypad(cmd_win, TRUE);
if(insert_mode) curs_set(2);
else curs_set(0);
}
static void readline_redisplay(){
cmd_win_redisplay(false);
}
/**
* @brief show_mode - redisplay middle string (with work mode and settings) + call cmd_win_redisplay
* @param group_refresh - true for grouping refresh (don't call doupdate())
*/
static void show_mode(bool group_refresh){
static const char *insmodetext = "INSERT (F1 - help)";
wclear(sep_win);
char buf[128];
if(insert_mode){
if(dtty){
switch(dtty->type){
case DEV_NETSOCKET:
snprintf(buf, 127, "%s HOST: %s, ENDLINE: %s, PORT: %s",
insmodetext, dtty->name, dtty->seol, dtty->port);
break;
case DEV_UNIXSOCKET:
if(*dtty->name)
snprintf(buf, 127, "%s PATH: %s, ENDLINE: %s",
insmodetext, dtty->name, dtty->seol);
else // name starting from \0
snprintf(buf, 127, "%s PATH: \\0%s, ENDLINE: %s",
insmodetext, dtty->name+1, dtty->seol);
break;
case DEV_TTY:
snprintf(buf, 127, "%s DEV: %s, ENDLINE: %s, SPEED: %d, FORMAT: %s",
insmodetext, dtty->name, dtty->seol, dtty->speed, dtty->port);
break;
default:
break;
}}else{
snprintf(buf, 127, "INSERT (TAB to switch, ctrl+D to quit) NOT INITIALIZED");
}
}else{
snprintf(buf, 127, "SCROLL (F1 - help) ENDLINE: %s", dtty?dtty->seol:"n");
}
wattron(sep_win, COLOR(BKGMARKED));
wprintw(sep_win, "%s ", dispnames[disp_type]);
wattroff(sep_win, COLOR(BKGMARKED));
wprintw(sep_win, "%s", buf);
if(group_refresh) wnoutrefresh(sep_win);
else wrefresh(sep_win);
cmd_win_redisplay(group_refresh);
}
/**
* @brief redisplay_addline - redisplay after line adding
* @param group_refresh - true for grouping refresh (don't call doupdate())
*/
static void redisplay_addline(){
// redisplay only if previous line was on screen
size_t lastno = firstdisplineno + LINES - 2; // number of first line out of screen
if(lastno < linebuffer->lnarr_curr){
return;
}
else if(lastno == linebuffer->lnarr_curr){ // scroll text by one line up
++firstdisplineno;
}
msg_win_redisplay(true);
show_mode(true);
doupdate();
}
/**
* @brief linebuf_free - clear memory of `linebuffer`
*/
static void linebuf_free(){
if(!linebuffer) return;
FREE(linebuffer->formatted_buffer);
FREE(linebuffer->line_array_idx);
FREE(linebuffer);
}
/**
* @brief chksizes - check sizes of buffers and enlarge them if need
*/
static void chksizes(){
size_t addportion = MAXCOLS*3;
if(rawbufsz - rawbufcur < addportion){ // raw buffer always should be big enough
rawbufsz += (addportion > RBUFSIZ) ? addportion : RBUFSIZ;
DBG("Enlarge raw buffer to %zd", rawbufsz);
raw_buffer = realloc(raw_buffer, rawbufsz);
}
if(linebuffer->fbuf_size - linebuffer->fbuf_curr < addportion){ // realloc buffer if need
linebuffer->fbuf_size += (addportion > FBUFSIZ) ? addportion : FBUFSIZ;
DBG("Enlarge formatted buffer to %zd", linebuffer->fbuf_size);
linebuffer->formatted_buffer = realloc(linebuffer->formatted_buffer, linebuffer->fbuf_size);
}
if(linebuffer->lnarr_size - linebuffer->lnarr_curr < 3){
linebuffer->lnarr_size += LINEARRSZ;
DBG("Enlarge line array buffer to %zd", linebuffer->lnarr_size);
linebuffer->line_array_idx = realloc(linebuffer->line_array_idx, linebuffer->lnarr_size * sizeof(size_t));
}
}
/**
* @brief linebuf_new - allocate data for new linebuffer
*/
static void linebuf_new(){
linebuf_free();
linebuffer = MALLOC(linebuf_t, 1);
linebuffer->fbuf_size = FBUFSIZ;
linebuffer->formatted_buffer = MALLOC(char, linebuffer->fbuf_size);
linebuffer->lnarr_size = LINEARRSZ;
linebuffer->line_array_idx = MALLOC(size_t, linebuffer->lnarr_size);
linebuffer->fbuf_curr = 0;
linebuffer->lnarr_curr = 0;
linebuffer->lastlen = 0;
int maxcols = (COLS > MAXCOLS) ? MAXCOLS : COLS;
// in hexdump view linelen is amount of symbols in one string, lastlen - amount of already printed symbols
if(disp_type == DISP_HEX){ // calculate minimal line width and ;
int n = maxcols - HEXDSPACES; // space for data
n -= n/8; // spaces after each 8 symbols
n /= 4; // hex XX + space + symbol view
// n should be 1..4, 8 or 16x
if(n < 1) n = 1; // minimal - one symbol per string
else if(n > 4){
if(n < 8) n = 4;
//else if(n < 16) n = 8;
else n -= n % 8;
}
linebuffer->linelen = n;
}else linebuffer->linelen = maxcols;
DBG("=====>> COLS=%d, maxcols=%d, linelen=%zd", COLS, maxcols, linebuffer->linelen);
linebuffer->line_array_idx[0] = 0; // initialize first line
chksizes();
}
/**
* @brief finalize_line - finalize last line in linebuffer & increase buffer sizes if nesessary
*/
static void finalize_line(){
chksizes();
linebuffer->formatted_buffer[linebuffer->fbuf_curr++] = 0; // finalize line
linebuffer->formatted_buffer[linebuffer->fbuf_curr] = 0; // and clear new line (`realloc` can generate some trash)
DBG("Current line is %s, no=%zd, len=%zd", linebuffer->formatted_buffer + linebuffer->line_array_idx[linebuffer->lnarr_curr], linebuffer->lnarr_curr, linebuffer->lastlen);
++linebuffer->lnarr_curr;
linebuffer->lastlen = 0;
linebuffer->line_array_idx[linebuffer->lnarr_curr] = linebuffer->fbuf_curr;
redisplay_addline();
}
/**
* @brief FormatData - get new data portion and format it into displayed buffer
* @param data - data start pointer in `raw_buffer`
* @param len - length of data portion
*/
void FormatData(const uint8_t *data, int len){
if(COLS > MAXCOLS-1) ERRX("Too wide column");
if(!data || len < 1) return;
chksizes();
DBG("Got %d bytes to process", len);
while(len){
// count amount of symbols in `data` to display until line is over
int Nsymbols = 0, curidx = 0;
int nrest = linebuffer->linelen - linebuffer->lastlen; // n symbols left in string for text/raw
switch(disp_type){
case DISP_TEXT: // 1 or 4 bytes per symbol
while(nrest > 0 && curidx < len){
uint8_t c = data[curidx++];
if(c == '\n'){ // finish string
++Nsymbols;
break;
}
if(c < 32 || c > 126) nrest -= 4; // "\xXX"
else --nrest;
if(nrest > -1) ++Nsymbols;
}
break;
case DISP_RAW: // 3 bytes per symbol
Nsymbols = nrest / 3;
break;
case DISP_HEX:
Nsymbols = nrest;
break;
default:
break;
}
if(Nsymbols > len) Nsymbols = len;
if(Nsymbols == 0){
DBG("No more plase in line - finalize");
finalize_line();
continue;
}
DBG("Process %d symbols", Nsymbols);
if(disp_type != DISP_HEX){
char *curptr = linebuffer->formatted_buffer+linebuffer->fbuf_curr;
for(int i = 0; i < Nsymbols; ++i){
uint8_t c = data[i];
int nadd = 0;
switch(disp_type){
case DISP_TEXT:
if(c == '\n'){ // finish line
DBG("Finish line, nadd=%d, i=%d!", nadd, i);
finalize_line();
break;
}
if(c < 32 || c > 126) nadd = sprintf(curptr, "\\x%.2X", c);
else{
nadd = 1;
*curptr = c;
}
break;
case DISP_RAW:
nadd = sprintf(curptr, "%-3.2X", c);
break;
default:
break;
}
linebuffer->fbuf_curr += nadd;
linebuffer->lastlen += nadd;
curptr += nadd;
}
}else{ // HEXDUMP: refill full string buffer
char ascii[MAXCOLS]; // buffer for ASCII printing
char *ptr = ptrtobuf(linebuffer->lnarr_curr);
if(!ptr) ERRX("Can't get current line");
size_t address = linebuffer->linelen * linebuffer->lnarr_curr; // string starting address
const uint8_t *start = data - linebuffer->lastlen; // starting byte in hexdump string
linebuffer->lastlen += Nsymbols;
int nadd = sprintf(ptr, "%-10.8zX", address);
ptr += nadd;
size_t i = 0;
for(; i < linebuffer->lastlen; ++i){
if(0 == (i % 8)){
sprintf(ptr, " "); ++ptr; ++nadd;
}
uint8_t c = start[i];
int x = sprintf(ptr, "%-3.2X", c);
if(c > 31 && c < 127) ascii[i] = c;
else ascii[i] = '.';
ptr += x;
nadd += x;
}
ascii[i] = 0;
int emptyvals = (int)(linebuffer->linelen - linebuffer->lastlen);
nadd += sprintf(ptr, "%*s|%*s|", 3*emptyvals+emptyvals/8, "", -((int)linebuffer->linelen), ascii);
linebuffer->fbuf_curr = linebuffer->line_array_idx[linebuffer->lnarr_curr] + nadd;
DBG("---- Total added symbols: %zd, fbuf_curr=%zd (%zd + %zd)", nadd, linebuffer->fbuf_curr,
linebuffer->line_array_idx[linebuffer->lnarr_curr], nadd);
}
DBG("last=%d, line=%d", linebuffer->lastlen, linebuffer->linelen);
if(linebuffer->lastlen == linebuffer->linelen) finalize_line();
len -= Nsymbols;
data += Nsymbols;
}
}
/**
* @brief AddData - add new data buffer to global buffer and last displayed string
* @param data - data
* @param len - length of `data`
*/
void AddData(const uint8_t *data, int len){
// now print all symbols into buff
chksizes();
memcpy(raw_buffer + rawbufcur, data, len);
DBG("Got %d bytes, now buffer have %d", len, rawbufcur+len);
FormatData(raw_buffer + rawbufcur, len);
rawbufcur += len;
redisplay_addline(); // display last symbols if can
}
static void resize(){
DBG("RESIZE WINDOW");
if(LINES > 2){
wresize(msg_win, LINES - 2, COLS);
wresize(sep_win, 1, COLS);
wresize(cmd_win, 1, COLS);
mvwin(sep_win, LINES - 2, 0);
mvwin(cmd_win, LINES - 1, 0);
}
pthread_mutex_lock(&dtty->mutex);
linebuf_new(); // free old and alloc new
FormatData(raw_buffer, rawbufcur); // reformat all data
pthread_mutex_unlock(&dtty->mutex);
msg_win_redisplay(true);
show_mode(true);
doupdate();
}
/*
void swinch(_U_ int sig){
//signal(SIGWINCH, swinch);
DBG("got resize");
}*/
void init_ncurses(){
if (!initscr())
fail_exit("Failed to initialize ncurses");
visual_mode = true;
if(has_colors()){
start_color();
use_default_colors();
}
cbreak();
noecho();
nonl();
intrflush(NULL, FALSE);
curs_set(2);
if(LINES > 2){
msg_win = newwin(LINES - 2, COLS, 0, 0);
sep_win = newwin(1, COLS, LINES - 2, 0);
cmd_win = newwin(1, COLS, LINES - 1, 0);
}
else{
msg_win = newwin(1, COLS, 0, 0);
sep_win = newwin(1, COLS, 0, 0);
cmd_win = newwin(1, COLS, 0, 0);
}
if(!msg_win || !sep_win || !cmd_win)
fail_exit("Failed to allocate windows");
wtimeout(cmd_win, 5);
keypad(cmd_win, TRUE);
if(has_colors()){
init_pair(BKG_NO, COLOR_WHITE, COLOR_BLUE);
init_pair(BKGMARKED_NO, 1, COLOR_BLUE); // COLOR_RED used in my usefull_macros
init_pair(ERROR_NO, COLOR_BLACK, 1);
init_pair(NORMAL_NO, COLOR_WHITE, COLOR_BLACK);
init_pair(MARKED_NO, COLOR_CYAN, COLOR_BLACK);
wbkgd(sep_win, COLOR(BKG));
}else{
wbkgd(sep_win, A_STANDOUT);
}
show_mode(false);
mousemask(BUTTON4_PRESSED|BUTTON5_PRESSED, NULL);
DBG("INIT raw buffer");
rawbufsz = RBUFSIZ;
raw_buffer = MALLOC(uint8_t, rawbufsz);
linebuf_new();
//signal(SIGWINCH, swinch);
}
void deinit_ncurses(){
visual_mode = false;
linebuf_free();
delwin(msg_win);
delwin(sep_win);
delwin(cmd_win);
endwin();
}
static char *previous_line = NULL; // previous line in readline input
static void got_command(char *line){
if(!line) // Ctrl-D pressed on empty line
should_exit = true;
else{
if(!*line) return; // zero length
if(!previous_line || strcmp(previous_line, line)) add_history(line); // omit repeats
FREE(previous_line);
int res = convert_and_send(input_type, line);
if(res == 0) show_err("Wrong data format");
else if(res == -1) ERRX("Device disconnected");
previous_line = line;
}
}
void init_readline(){
rl_catch_signals = 0;
rl_catch_sigwinch = 0;
rl_deprep_term_function = NULL;
rl_prep_term_function = NULL;
rl_change_environment = 0;
rl_getc_function = readline_getc;
rl_input_available_hook = readline_input_avail;
rl_redisplay_function = readline_redisplay;
rl_callback_handler_install("", got_command);
}
/**
* @brief change_disp - change input or output data types (text/raw/hex)
* @param in, out - types for input and display
*/
static void change_disp(disptype in, disptype out){
if(in >= DISP_TEXT && in < DISP_UNCHANGED && in != input_type){
input_type = in;
DBG("input -> %s", dispnames[in]);
}
if(out >= DISP_TEXT && out <= DISP_HEX && out != disp_type){
disp_type = out;
DBG("output -> %s", dispnames[out]);
resize(); // reformat everything
}
show_mode(false);
}
void deinit_readline(){
rl_callback_handler_remove();
}
/**
* @brief rolldown/rollup - roll text by `N` strings
* @param N - amount of strings
*/
static void rolldown(size_t N){ // if N==0 goto first line
DBG("rolldown for %zd, first was %zd", N, firstdisplineno);
size_t old = firstdisplineno;
if(firstdisplineno < N || N == 0) firstdisplineno = 0;
else firstdisplineno -= N;
DBG("old was %zd, become %zd", old, firstdisplineno);
if(old == firstdisplineno) return;
msg_win_redisplay(false);
//msg_win_redisplay(true); show_mode(true); doupdate();
}
static void rollup(size_t N){ // if N==0 goto last line
DBG("scroll up for %d", N);
size_t half = (LINES+1)/2;
if(firstdisplineno + half >= linebuffer->lnarr_curr){
DBG("Don't need: %zd+%zd >= %zd", firstdisplineno, half, linebuffer->lnarr_curr);
return; // don't scroll over a half of viewed area
}
size_t old = firstdisplineno;
firstdisplineno += N;
if(firstdisplineno + half > linebuffer->lnarr_curr || N == 0) firstdisplineno = linebuffer->lnarr_curr - half;
DBG("old was %zd, become %zd", old, firstdisplineno);
if(old == firstdisplineno) return;
msg_win_redisplay(false);
//msg_win_redisplay(true); show_mode(true); doupdate();
}
static const char *help[] = {
"Common commands:",
" F1 - show this help",
" F2 - text mode",
" F3 - raw mode (all symbols in hex codes)",
" F4 - hexdump mode (like hexdump output)",
" F5 - modbus RTU mode (only for sending), input like RAW: ID data",
" F6 - modbus RTU mode (only for sending), input like HEX: ID data",
" mouse scroll - scroll text output",
" q,^c,^d - quit",
" TAB - switch between scroll and edit modes",
" to change display/input (text/raw/hex) press Fx when scroll/edit",
" in scroll mode keys are almost the same like for this help"
" Text mode: in input and output all special symbols are like \\code",
" Raw mode: output only in hex, input in dec, 0xhex, 0bbin, 0oct (space separated)",
" Hexdump mode: output like hexdump, input only hex (with or without spaces)",
"",
"This help:",
" ^p,<Up> - scroll the viewport up by one row",
" ^n,<Down> - scroll the viewport down by one row",
" ^l,<Left> - scroll the viewport left by one column",
" ^r,<Right> - scroll the viewport right by one column",
" h,<Home> - scroll the viewport to top of file",
" ^F,<PageDn> - scroll to the next page",
" ^B,<PageUp> - scroll to the previous page",
" e,<End> - scroll the viewport to end of file",
0
};
/**
* @brief cmdline - console reading process; runs as separate thread
* @param arg - tty/socket device to write strings entered by user
* @return NULL
*/
void *cmdline(void* arg){
MEVENT event;
dtty = (chardevice*)arg;
show_mode(false);
do{
int c = wgetch(cmd_win);
if(c < 0) continue;
bool processed = true;
DBG("wgetch got %d", c);
disptype dt = DISP_UNCHANGED;
switch(c){ // common keys for both modes
case KEY_F(1): // help
DBG("\n\nASK for help\n\n");
popup_msg(msg_win, help);
resize(); // call `resize` to enshure that no problems would be later
break;
case KEY_F(2): // TEXT mode
DBG("\n\nIN TEXT mode\n\n");
dt = DISP_TEXT;
break;
case KEY_F(3): // RAW mode
DBG("\n\nIN RAW mode\n\n");
dt = DISP_RAW;
break;
case KEY_F(4): // HEX mode
DBG("\n\nIN HEX mode\n\n");
dt = DISP_HEX;
break;
case KEY_F(5): // RTU mode
DBG("\n\nIN RTU RAW mode\n\n");
dt = DISP_RTURAW;
break;
case KEY_F(6): // RTU mode
DBG("\n\nIN RTU HEX mode\n\n");
dt = DISP_RTUHEX;
break;
case KEY_MOUSE:
if(getmouse(&event) == OK){
if(event.bstate & (BUTTON4_PRESSED)) rolldown(1); // wheel up
else if(event.bstate & (BUTTON5_PRESSED)) rollup(1); // wheel down
}
break;
case '\t': // tab switch between scroll and edit mode
insert_mode = !insert_mode;
show_mode(false);
break;
case KEY_RESIZE:
resize();
break;
default:
processed = false;
}
if(dt != DISP_UNCHANGED){
if(insert_mode) change_disp(dt, DISP_UNCHANGED);
else change_disp(DISP_UNCHANGED, dt);
}
if(processed) continue;
if(insert_mode){
DBG("forward_to_readline(%d)", c);
char *ptr = NULL;
switch(c){ // check special keys
case KEY_UP:
ptr = "A";
break;
case KEY_DOWN:
ptr = "B";
break;
case KEY_RIGHT:
ptr = "C";
break;
case KEY_LEFT:
ptr = "D";
break;
case KEY_BACKSPACE:
ptr = "H";
break;
case KEY_IC:
DBG("key insert");
ptr = "2~";
break;
case KEY_DC:
ptr = "3~";
break;
case KEY_HOME:
ptr = "H";
break;
case KEY_PPAGE:
ptr = "5~";
break;
case KEY_NPAGE:
ptr = "6~";
break;
case KEY_END:
ptr = "F";
break;
default:
forward_to_readline(c);
}
if(ptr){ // arrows and so on: 27, 91, code
forward_to_readline(27);
forward_to_readline(91);
while(*ptr) forward_to_readline(*ptr++);
}
}else{
switch(c){ // TODO: add home/end
case KEY_HOME:
rolldown(0);
break;
case KEY_END:
rollup(0);
break;
case KEY_UP: // roll down for one item
rolldown(1);
break;
case KEY_DOWN: // roll up for one item
rollup(1);
break;
case KEY_PPAGE: // PageUp: roll down for 2/3 of screen
rolldown((2*LINES)/3);
break;
case KEY_NPAGE: // PageUp: roll up for 2/3 of screen
rollup((2*LINES)/3);
break;
default:
if(c == 'q' || c == 'Q') should_exit = true; // quit
}
}
}while(!should_exit);
signals(0);
return NULL;
}
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