You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
364 lines
7.2 KiB
364 lines
7.2 KiB
#include <esp8266.h>
|
|
#include "ansi_parser.h"
|
|
#include "screen.h"
|
|
#include "ascii.h"
|
|
#include "uart_driver.h"
|
|
|
|
/* Ragel constants block */
|
|
%%{
|
|
machine ansi;
|
|
write data;
|
|
}%%
|
|
|
|
static volatile int cs = -1;
|
|
static volatile bool inside_osc = false;
|
|
|
|
volatile u32 ansi_parser_char_cnt = 0;
|
|
|
|
void ICACHE_FLASH_ATTR
|
|
ansi_parser_reset(void) {
|
|
if (cs != ansi_start) {
|
|
cs = ansi_start;
|
|
inside_osc = false;
|
|
apars_reset_utf8buffer();
|
|
ansi_warn("Parser timeout, state reset");
|
|
}
|
|
}
|
|
|
|
#define HISTORY_LEN 10
|
|
|
|
#if DEBUG_ANSI
|
|
static char history[HISTORY_LEN + 1];
|
|
#endif
|
|
|
|
void ICACHE_FLASH_ATTR
|
|
apars_handle_badseq(void)
|
|
{
|
|
#if DEBUG_ANSI
|
|
char buf1[HISTORY_LEN*3+2];
|
|
char buf2[HISTORY_LEN*3+2];
|
|
char *b1 = buf1;
|
|
char *b2 = buf2;
|
|
char c;
|
|
|
|
for(int i=0;i<HISTORY_LEN;i++) {
|
|
c = history[i];
|
|
b1 += sprintf(b1, "%2X ", c);
|
|
if (c < 32 || c > 127) c = '.';
|
|
b2 += sprintf(b2, "%c ", c);
|
|
}
|
|
|
|
ansi_dbg("Context: %s", buf2);
|
|
ansi_dbg(" %s", buf1);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* \brief Linear ANSI chars stream parser
|
|
*
|
|
* Parses a stream of bytes using a Ragel parser. The defined
|
|
* grammar does not use 'unget', so the entire buffer is
|
|
* always processed in a linear manner.
|
|
*
|
|
* \attention -> but always check the Ragel output for 'p--'
|
|
* or 'p -=', that means trouble.
|
|
*
|
|
* \param newdata - array of new chars to process
|
|
* \param len - length of the newdata buffer
|
|
*/
|
|
void ICACHE_FLASH_ATTR
|
|
ansi_parser(char newchar)
|
|
{
|
|
// The CSI code is built here
|
|
static char csi_leading; //!< Leading char, 0 if none
|
|
static int csi_ni; //!< Number of the active digit
|
|
static int csi_cnt; //!< Digit count
|
|
static int csi_n[CSI_N_MAX]; //!< Param digits
|
|
static char csi_char; //!< CSI action char (end)
|
|
static char osc_buffer[OSC_CHAR_MAX];
|
|
static int osc_bi; // buffer char index
|
|
|
|
// This is used to detect timeout delay (time since last rx char)
|
|
ansi_parser_char_cnt++;
|
|
|
|
// Init Ragel on the first run
|
|
if (cs == -1) {
|
|
%% write init;
|
|
|
|
#if DEBUG_ANSI
|
|
memset(history, 0, sizeof(history));
|
|
#endif
|
|
}
|
|
|
|
#if DEBUG_ANSI
|
|
for(int i=1; i<HISTORY_LEN; i++) {
|
|
history[i-1] = history[i];
|
|
}
|
|
history[HISTORY_LEN-1] = newchar;
|
|
#endif
|
|
|
|
// Handle simple characters immediately (bypass parser)
|
|
if (newchar < ' ') {
|
|
switch (newchar) {
|
|
case ESC:
|
|
if (!inside_osc) {
|
|
// Reset state
|
|
cs = ansi_start;
|
|
// now the ESC will be processed by the parser
|
|
}
|
|
break; // proceed to parser
|
|
|
|
// Literally passed
|
|
case FF:
|
|
case VT:
|
|
newchar = LF; // translate to LF, like VT100 / xterm do
|
|
case CR:
|
|
case LF:
|
|
case TAB:
|
|
case BS:
|
|
apars_handle_plainchar(newchar);
|
|
return;
|
|
|
|
// Select G0 or G1
|
|
case SI:
|
|
screen_set_charset_n(1);
|
|
return;
|
|
case SO:
|
|
screen_set_charset_n(0);
|
|
return;
|
|
|
|
case BEL:
|
|
// bel is also used to terminate OSC
|
|
if (!inside_osc) {
|
|
apars_handle_bel();
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case ENQ: // respond with space (like xterm)
|
|
UART_WriteChar(UART0, SP, UART_TIMEOUT_US);
|
|
return;
|
|
|
|
// Cancel the active sequence
|
|
case CAN:
|
|
case SUB:
|
|
cs = ansi_start;
|
|
return;
|
|
|
|
default:
|
|
// Discard all others
|
|
return;
|
|
}
|
|
} else {
|
|
// >= ' '
|
|
|
|
// bypass the parser for simple characters (speed-up)
|
|
if (cs == ansi_start) {
|
|
apars_handle_plainchar(newchar);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Load new data to Ragel vars
|
|
const char *p = &newchar;
|
|
const char *eof = NULL;
|
|
const char *pe = &newchar + 1;
|
|
|
|
// The parser
|
|
%%{
|
|
#/*
|
|
ESC = 27;
|
|
NOESC = (any - ESC);
|
|
TOK_ST = ESC '\\'; # String terminator - used for OSC commands
|
|
OSC_END = ('\a' | TOK_ST);
|
|
|
|
# --- Regular characters to be printed ---
|
|
|
|
action plain_char {
|
|
if (fc != 0) {
|
|
apars_handle_plainchar(fc);
|
|
}
|
|
}
|
|
|
|
# --- CSI CSI commands (Select Graphic Rendition) ---
|
|
# Text color & style
|
|
|
|
action CSI_start {
|
|
// Reset the CSI builder
|
|
csi_leading = csi_char = 0;
|
|
csi_ni = 0;
|
|
csi_cnt = 0;
|
|
|
|
// Zero out digits
|
|
for(int i = 0; i < CSI_N_MAX; i++) {
|
|
csi_n[i] = 0;
|
|
}
|
|
|
|
fgoto CSI_body;
|
|
}
|
|
|
|
action CSI_leading {
|
|
csi_leading = fc;
|
|
}
|
|
|
|
action CSI_digit {
|
|
if (csi_cnt == 0) csi_cnt = 1;
|
|
// x10 + digit
|
|
if (csi_ni < CSI_N_MAX) {
|
|
csi_n[csi_ni] = csi_n[csi_ni]*10 + (fc - '0');
|
|
}
|
|
}
|
|
|
|
action CSI_semi {
|
|
if (csi_cnt == 0) csi_cnt = 1; // handle case when first arg is empty
|
|
csi_cnt++;
|
|
csi_ni++;
|
|
}
|
|
|
|
action CSI_end {
|
|
csi_char = fc;
|
|
apars_handle_CSI(csi_leading, csi_n, csi_cnt, csi_char);
|
|
fgoto main;
|
|
}
|
|
|
|
action errBadSeq {
|
|
ansi_warn("Parser error.");
|
|
apars_handle_badseq();
|
|
fgoto main;
|
|
}
|
|
|
|
action back2main {
|
|
fgoto main;
|
|
}
|
|
|
|
CSI_body := ((32..47|60..64) @CSI_leading)?
|
|
((digit @CSI_digit)* ';' @CSI_semi)*
|
|
(digit @CSI_digit)* (alpha|'`'|'@') @CSI_end $!errBadSeq;
|
|
|
|
|
|
# --- OSC commands (Operating System Commands) ---
|
|
# Module parametrisation
|
|
|
|
action OSC_start {
|
|
csi_ni = 0;
|
|
|
|
// we reuse the CSI numeric buffer
|
|
for(int i = 0; i < CSI_N_MAX; i++) {
|
|
csi_n[i] = 0;
|
|
}
|
|
|
|
osc_bi = 0;
|
|
osc_buffer[0] = '\0';
|
|
|
|
inside_osc = true;
|
|
|
|
fgoto OSC_body;
|
|
}
|
|
|
|
# collecting title string; this can also be entered by ESC k
|
|
action SetTitle_start {
|
|
osc_bi = 0;
|
|
osc_buffer[0] = '\0';
|
|
inside_osc = true;
|
|
fgoto TITLE_body;
|
|
}
|
|
|
|
action OSC_resize {
|
|
apars_handle_OSC_SetScreenSize(csi_n[0], csi_n[1]);
|
|
inside_osc = false;
|
|
fgoto main;
|
|
}
|
|
|
|
action OSC_text_char {
|
|
osc_buffer[osc_bi++] = fc;
|
|
}
|
|
|
|
action OSC_title {
|
|
osc_buffer[osc_bi++] = '\0';
|
|
apars_handle_OSC_SetTitle(osc_buffer);
|
|
inside_osc = false;
|
|
fgoto main;
|
|
}
|
|
|
|
action OSC_button {
|
|
osc_buffer[osc_bi++] = '\0';
|
|
apars_handle_OSC_SetButton(csi_n[0], osc_buffer);
|
|
inside_osc = false;
|
|
fgoto main;
|
|
}
|
|
|
|
# 0; is xterm title hack
|
|
OSC_body := (
|
|
("BTN" digit @CSI_digit '=' (NOESC @OSC_text_char)* OSC_END @OSC_button) |
|
|
("TITLE=" @SetTitle_start) |
|
|
("0;" @SetTitle_start) |
|
|
('W' (digit @CSI_digit)+ ';' @CSI_semi (digit @CSI_digit)+ OSC_END @OSC_resize)
|
|
) $!errBadSeq;
|
|
|
|
TITLE_body := (NOESC @OSC_text_char)* OSC_END @OSC_title $!errBadSeq;
|
|
|
|
action RESET_cmd {
|
|
// Reset screen
|
|
apars_handle_RESET_cmd();
|
|
fgoto main;
|
|
}
|
|
|
|
action CSI_SaveCursorAttrs {
|
|
apars_handle_saveCursorAttrs();
|
|
fgoto main;
|
|
}
|
|
|
|
action CSI_RestoreCursorAttrs {
|
|
apars_handle_restoreCursorAttrs();
|
|
fgoto main;
|
|
}
|
|
|
|
action HASH_code {
|
|
apars_handle_hashCode(fc);
|
|
fgoto main;
|
|
}
|
|
|
|
action SHORT_code {
|
|
apars_handle_shortCode(fc);
|
|
fgoto main;
|
|
}
|
|
|
|
action SetXCtrls {
|
|
apars_handle_setXCtrls(fc); // weird control settings like 7 bit / 8 bit mode
|
|
fgoto main;
|
|
}
|
|
|
|
action CharsetCmd_start {
|
|
// abuse the buffer for storing the leading char
|
|
osc_buffer[0] = fc;
|
|
fgoto charsetcmd_body;
|
|
}
|
|
|
|
action CharsetCmd_end {
|
|
apars_handle_characterSet(osc_buffer[0], fc);
|
|
fgoto main;
|
|
}
|
|
|
|
charsetcmd_body := (any @CharsetCmd_end) $!errBadSeq;
|
|
|
|
# --- Main parser loop ---
|
|
|
|
main :=
|
|
(
|
|
(NOESC @plain_char)* ESC (
|
|
('[' @CSI_start) |
|
|
(']' @OSC_start) |
|
|
('#' digit @HASH_code) |
|
|
('k' @SetTitle_start) |
|
|
([a-jl-zA-Z0-9=<>] @SHORT_code) |
|
|
([()*+-./] @CharsetCmd_start) |
|
|
(' ' [FG] @SetXCtrls)
|
|
)
|
|
)+ $!errBadSeq;
|
|
|
|
write exec;
|
|
#*/
|
|
}%%
|
|
}
|
|
|
|
// 'ESC k blah OSC_end' is a shortcut for setting title (k is defined in GNU screen as Title Definition String)
|
|
|