ESPTerm - ESP8266 terminal emulator. Branches: [master] patches, [work] next release
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espterm-firmware/user/apars_csi.c

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16 KiB

//
// Created by MightyPork on 2017/08/20.
//
// Handle CSI sequences
// CSI <symbol?> Pm <symbol?> <char>
// (CSI = ESC [)
//
// Example of those are cursor manipulation sequences and SGR.
//
// For details, see:
// http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Functions-using-CSI-_-ordered-by-the-final-character_s_
//
// Note:
// not all sequences listed in the xterm manual are implemented, notably sequences with the trailing symbol,
// graphic mode sequences, mouse reporting and complex multi-argument sequences that operate on regions.
//
// The screen size can be set using the xterm sequence: CSI Py ; Px t
//
#include <esp8266.h>
#include "apars_csi.h"
#include "screen.h"
#include "apars_logging.h"
#include "ansi_parser.h"
#include "ascii.h"
#include "ansi_parser_callbacks.h"
#include "uart_driver.h"
#include "sgr.h"
#include "version.h"
#include "syscfg.h"
// TODO simplify file - split to subroutines
static void warn_bad_csi()
{
ansi_noimpl_r("Unknown CSI");
apars_show_context();
}
typedef struct {
char lead;
const int *n;
int count;
char aug; // augmenting
char key;
} CSI_Data;
static void do_csi_privattr(CSI_Data *opts);
static void do_csi_sgr(CSI_Data *opts);
static void do_csi_decreqtparm(CSI_Data *opts);
/**
* Handle fully received CSI ANSI sequence
* @param leadchar - private range leading character, 0 if none
* @param params - array of CSI_N_MAX ints holding the numeric arguments
* @param keychar - the char terminating the sequence
*/
void ICACHE_FLASH_ATTR
apars_handle_csi(char leadchar, const int *params, int count, char keychar)
{
CSI_Data opts = {leadchar, params, count, NUL, keychar};
char buf[32];
bool yn = false; // for ? l h
int n1 = params[0];
int n2 = params[1];
int n3 = params[2];
// defaults - FIXME this may inadvertently affect some variants that should be left unchanged
switch (keychar) {
case 'A': // move
case 'a':
case 'e':
case 'B':
case 'C':
case 'D':
case 'b':
case 'E':
case 'F':
case 'G': // set X
case '`':
case 'S': // scrolling
case 'T':
case 'X': // clear in line
case 'd': // set Y
case 'L':
case 'M':
case '@':
case 'P':
case 'I':
case 'Z':
if (n1 == 0) n1 = 1;
break;
case 'H':
case 'f':
if (n1 == 0) n1 = 1;
if (n2 == 0) n2 = 1;
break;
case 'J':
case 'K':
if (n1 > 2) n1 = 0;
break;
default:
// leave as is
break;
}
switch (keychar) {
// CUU CUD CUF CUB
case 'A': // Up
screen_cursor_move(-n1, 0, false);
break;
case 'e':
case 'B': // Down
screen_cursor_move(n1, 0, false);
break;
case 'a': // some archaic form of "Go Right"
case 'C': // Right (forward)
screen_cursor_move(0, n1, false);
break;
case 'D': // Left (backward)
screen_cursor_move(0, -n1, false);
break;
case 'E': // CNL - Cursor Next Line
screen_cursor_move(n1, 0, false);
screen_cursor_set_x(0);
break;
case 'F': // CPL - Cursor Prev Line
screen_cursor_move(-n1, 0, false);
screen_cursor_set_x(0);
break;
case 'b':
// TODO repeat preceding graphic character n1 times
ansi_noimpl("Repeat char");
return;
// Set X
case 'G':
case '`': // alternate code
screen_cursor_set_x(n1 - 1);
break; // 1-based
// Set Y
case 'd':
screen_cursor_set_y(n1 - 1);
break; // 1-based
// Clear in line
case 'X':
screen_clear_in_line(n1);
break; // 1-based
// SU, SD - scroll up/down
case 'S':
if (leadchar == NUL && count <= 1) {
screen_scroll_up(n1);
}
else {
// other:
// CSI ? Pi; Pa; Pv S (sixel)
warn_bad_csi();
}
break;
case 'T':
if (leadchar == NUL && count <= 1) {
// CSI Ps T
screen_scroll_down(n1);
}
else {
// other:
// CSI Ps ; Ps ; Ps ; Ps ; Ps T
// CSI > Ps; Ps T
warn_bad_csi();
}
break;
case 't': // xterm window commands
if (leadchar == NUL && count <= 2) {
// CSI Ps ; Ps ; Ps t
switch (n1) {
case 8: // set size
screen_resize(n2, n3);
break;
case 18: // report size
printf(buf, "\033[8;%d;%dt", termconf_scratch.height, termconf_scratch.width);
apars_respond(buf);
break;
case 21: // Report title
apars_respond("\033]L");
apars_respond(termconf_scratch.title);
apars_respond("\033\\");
break;
case 24: // Set Height only
screen_resize(n2, termconf_scratch.width);
break;
default:
ansi_noimpl("CSI %d t", n1);
break;
}
}
else {
// other:
// CSI > Ps; Ps t
// CSI Ps SP t,
warn_bad_csi();
}
break;
// CUP,HVP - set position
case 'H':
case 'f':
screen_cursor_set(n1-1, n2-1);
break; // 1-based
case 'J': // Erase screen
if (leadchar == '?') {
// TODO selective erase
ansi_noimpl("Selective erase");
}
if (n1 == 0) {
screen_clear(CLEAR_FROM_CURSOR);
} else if (n1 == 1) {
screen_clear(CLEAR_TO_CURSOR);
} else {
screen_clear(CLEAR_ALL);
screen_cursor_set(0, 0);
}
break;
case 'K': // Erase lines
if (leadchar == '?') {
// TODO selective erase
ansi_noimpl("Selective erase");
}
if (n1 == 0) {
screen_clear_line(CLEAR_FROM_CURSOR);
} else if (n1 == 1) {
screen_clear_line(CLEAR_TO_CURSOR);
} else {
screen_clear_line(CLEAR_ALL);
}
break;
// SCP, RCP - save/restore position
case 's':
if (leadchar == NUL && count == 0) {
screen_cursor_save(0);
}
else if (leadchar == '?') {
// Save private attributes (CSI ? Pm h/l)
ansi_noimpl("Save private attrs");
}
else {
// other:
// CSI ? Pm s
// CSI Pl; Pr s
warn_bad_csi();
}
break;
case 'r':
if (leadchar == NUL && (count == 2 || count == 0)) {
screen_set_scrolling_region(n1, n2);
}
else if (leadchar == '?') {
// Restore private attributes (CSI ? Pm h/l)
ansi_noimpl("Restore private attrs");
}
else {
// other:
// CSI ? Pm r
// CSI Pt; Pl; Pb; Pr; Ps$ r
warn_bad_csi();
}
break;
case 'u':
if (leadchar == NUL && count == 0) {
screen_cursor_restore(0);
}
else {
warn_bad_csi();
}
break;
case 'h': // DEC feature enable
case 'l': // DEC feature disable
do_csi_privattr(&opts);
break;
case 'm': // SGR - set graphics rendition
do_csi_sgr(&opts);
break;
case 'L': // Insert lines (shove down)
screen_insert_lines(n1);
break;
case 'M': // Delete lines (pull up)
screen_delete_lines(n1);
break;
case '@': // Insert in line (shove right)
screen_insert_characters(n1);
break;
case 'P': // Delete in line (pull left)
screen_delete_characters(n1);
break;
case 'g': // Clear tabs
if (n1 == 3) {
screen_clear_all_tabs();
7 years ago
}
else if (n1 == 0) {
screen_clear_tab();
}
break;
case 'Z': // Tab backward
screen_tab_reverse(n1);
break;
case 'I': // Tab forward
screen_tab_forward(n1);
break;
case 'p':
if (leadchar == '!') { // RIS
/* On real VT there are differences between soft and hard reset, we treat both equally */
screen_reset();
}
else {
warn_bad_csi();
}
break;
case 'n': // Queries
if (leadchar == '>') {
// some xterm garbage - discard
// CSI > Ps n
ansi_noimpl("CSI > %d n", n1);
break;
}
if (leadchar == NUL) {
if (n1 == 6) {
// Query cursor position
int x, y;
screen_cursor_get(&y, &x);
sprintf(buf, "\033[%d;%dR", y + 1, x + 1);
apars_respond(buf);
}
else if (n1 == 5) {
// Query device status - reply "Device is OK"
apars_respond("\033[0n");
}
else {
warn_bad_csi();
}
}
else {
warn_bad_csi();
}
break;
case 'c': // CSI-c - report capabilities
if (leadchar == NUL) {
apars_respond("\033[?64;9c"); // pretend we're vt400 with national character sets
}
else if (leadchar == '>') {
// 41 - we're "VT400", 0 - ROM cartridge number
sprintf(buf, "\033[>41;%d;0c", FIRMWARE_VERSION_NUM);
apars_respond(buf);
}
else {
warn_bad_csi();
}
break;
case 'x': // DECREQTPARM -> DECREPTPARM
do_csi_decreqtparm(&opts);
break;
default:
warn_bad_csi();
}
}
/**
* CSI [?] Pm {h|l}
* @param opts
*/
static void ICACHE_FLASH_ATTR do_csi_privattr(CSI_Data *opts)
{
bool yn = (opts->key == 'h');
if (opts->lead == '?') {
// --- DEC private attributes ---
for (int i = 0; i < opts->count; i++) {
int n = opts->n[i];
if (n == 1) {
screen_set_cursors_alt_mode(yn);
}
else if (n == 2) {
// should reset all Gx to USASCII and reset to VT100 (which we use always)
screen_set_charset(0, 'B');
screen_set_charset(1, 'B');
}
else if (n == 3) {
// 132 column mode - not implemented due to RAM demands
ansi_noimpl("80->132");
}
else if (n == 4) {
// Smooth scroll - not implemented
}
else if (n == 5) {
screen_set_reverse_video(yn);
}
else if (n == 6) {
screen_set_origin_mode(yn);
}
else if (n == 7) {
screen_wrap_enable(yn);
}
else if (n == 8) {
// Key auto-repeat
// We don't implement this currently, but it could be added
// - discard repeated keypress events between keydown and keyup.
ansi_noimpl("Auto-repeat toggle");
}
else if (n == 9 || (n >= 1000 && n <= 1006)) {
// TODO mouse
// 1000 - C11 mouse - Send Mouse X & Y on button press and release.
// 1001 - Hilite mouse tracking
// 1002 - Cell Motion Mouse Tracking
// 1003 - All Motion Mouse Tracking
// 1004 - Send FocusIn/FocusOut events
// 1005 - Enable UTF-8 Mouse Mode
// 1006 - SGR mouse mode
ansi_noimpl("Mouse tracking");
}
else if (n == 12) {
// TODO Cursor blink on/off
ansi_noimpl("Cursor blink toggle");
}
else if (n == 40) {
// allow/disallow 80->132 mode
// not implemented because of RAM demands
ansi_noimpl("80->132 enable");
}
else if (n == 45) {
// reverse wrap-around
ansi_noimpl("Reverse Wraparound");
}
else if (n == 69) {
// horizontal margins
ansi_noimpl("Left/right margin");
}
else if (n == 47 || n == 1047) {
// Switch to/from alternate screen
// - not implemented fully due to RAM demands
screen_swap_state(yn);
}
else if (n == 1048) {
// same as DECSC - save/restore cursor with attributes
if (yn) {
screen_cursor_save(true);
}
else {
screen_cursor_restore(true);
}
}
else if (n == 1049) {
// save/restore cursor and screen and clear it
if (yn) {
screen_cursor_save(true);
screen_swap_state(true); // this should save the screen - can't because of RAM size
screen_clear(CLEAR_ALL);
}
else {
screen_clear(CLEAR_ALL);
screen_swap_state(false); // this should restore the screen - can't because of RAM size
screen_cursor_restore(true);
}
}
else if (n >= 1050 && n <= 1053) {
// TODO Different kinds of function key emulation ?
// (In practice this seems hardly ever used)
// Ps = 1 0 5 0 -> Set terminfo/termcap function-key mode.
// Ps = 1 0 5 1 -> Set Sun function-key mode.
// Ps = 1 0 5 2 -> Set HP function-key mode.
// Ps = 1 0 5 3 -> Set SCO function-key mode.
ansi_noimpl("FN key emul type");
}
else if (n == 2004) {
// Bracketed paste mode
// Discard, we don't implement this
}
else if (n == 25) {
screen_set_cursor_visible(yn);
}
else {
ansi_noimpl("CSI ? %d %c", n, opts->key);
}
}
}
else {
// --- DEC standard attributes ---
for (int i = 0; i < opts->count; i++) {
int n = opts->n[i];
if (n == 4) {
screen_set_insert_mode(yn);
}
else if (n == 20) {
screen_set_newline_mode(yn);
}
else {
ansi_noimpl("CSI %d %c", n, opts->key);
}
}
}
}
/**
* CSI [ Pm m
* @param opts
*/
static void ICACHE_FLASH_ATTR do_csi_sgr(CSI_Data *opts)
{
int count = opts->count;
if (count == 0) {
count = 1; // this makes it work as 0 (reset)
}
if (opts->lead != NUL) {
// some xterm garbage - discard
// CSI > Ps; Ps m
return;
}
// iterate arguments
for (int i = 0; i < count; i++) {
int n = opts->n[i];
if (n == SGR_RESET) screen_reset_sgr();
// -- set color --
else if (n >= SGR_FG_START && n <= SGR_FG_END) screen_set_fg((Color) (n - SGR_FG_START)); // ANSI normal fg
else if (n >= SGR_BG_START && n <= SGR_BG_END) screen_set_bg((Color) (n - SGR_BG_START)); // ANSI normal bg
else if (n == SGR_FG_DEFAULT) screen_set_fg(termconf_scratch.default_fg); // default fg
else if (n == SGR_BG_DEFAULT) screen_set_bg(termconf_scratch.default_bg); // default bg
// -- set attr --
else if (n == SGR_BOLD) screen_set_sgr(ATTR_BOLD, 1);
else if (n == SGR_FAINT) screen_set_sgr(ATTR_FAINT, 1);
else if (n == SGR_ITALIC) screen_set_sgr(ATTR_ITALIC, 1);
else if (n == SGR_UNDERLINE) screen_set_sgr(ATTR_UNDERLINE, 1);
else if (n == SGR_BLINK || n == SGR_BLINK_FAST) screen_set_sgr(ATTR_BLINK, 1); // 6 - rapid blink, not supported
else if (n == SGR_STRIKE) screen_set_sgr(ATTR_STRIKE, 1);
else if (n == SGR_FRAKTUR) screen_set_sgr(ATTR_FRAKTUR, 1);
else if (n == SGR_INVERSE) screen_set_sgr_inverse(1);
// -- clear attr --
else if (n == SGR_OFF(SGR_BOLD)) screen_set_sgr(ATTR_BOLD, 0); // can also mean "Double Underline"
else if (n == SGR_OFF(SGR_FAINT)) screen_set_sgr(ATTR_FAINT | ATTR_BOLD, 0); // "normal"
else if (n == SGR_OFF(SGR_ITALIC)) screen_set_sgr(ATTR_ITALIC | ATTR_FRAKTUR, 0); // there is no dedicated OFF code for Fraktur
else if (n == SGR_OFF(SGR_UNDERLINE)) screen_set_sgr(ATTR_UNDERLINE, 0);
else if (n == SGR_OFF(SGR_BLINK)) screen_set_sgr(ATTR_BLINK, 0);
else if (n == SGR_OFF(SGR_STRIKE)) screen_set_sgr(ATTR_STRIKE, 0);
else if (n == SGR_OFF(SGR_INVERSE)) screen_set_sgr_inverse(0);
// -- AIX bright colors --
else if (n >= SGR_FG_BRT_START && n <= SGR_FG_BRT_END) screen_set_fg((Color) ((n - SGR_FG_BRT_START) + 8)); // AIX bright fg
else if (n >= SGR_BG_BRT_START && n <= SGR_BG_BRT_END) screen_set_bg((Color) ((n - SGR_BG_BRT_START) + 8)); // AIX bright bg
else {
ansi_noimpl("SGR %d", n);
}
}
}
// data tables for the DECREPTPARM command response
struct DECREPTPARM_parity { int parity; const char * msg; };
static const struct DECREPTPARM_parity DECREPTPARM_parity_arr[] = {
{PARITY_NONE, "1"},
{PARITY_ODD, "4"},
{PARITY_EVEN, "5"},
{-1, 0}
};
struct DECREPTPARM_baud { int baud; const char * msg; };
static const struct DECREPTPARM_baud DECREPTPARM_baud_arr[] = {
{BIT_RATE_300, "48"},
{BIT_RATE_600, "56"},
{BIT_RATE_1200, "64"},
{BIT_RATE_2400, "88"},
{BIT_RATE_4800, "96"},
{BIT_RATE_9600 , "104"},
{BIT_RATE_19200 , "112"},
{BIT_RATE_38400 , "120"},
{BIT_RATE_57600 , "128"}, // this is the last in the spec, follow +8
{BIT_RATE_74880 , "136"},
{BIT_RATE_115200, "144"},
{BIT_RATE_230400, "152"},
{BIT_RATE_460800, "160"},
{BIT_RATE_921600, "168"},
{BIT_RATE_1843200, "176"},
{BIT_RATE_3686400, "184"},
{-1, 0}
};
/**
* CSI [ Ps x
* @param opts
*/
static void ICACHE_FLASH_ATTR do_csi_decreqtparm(CSI_Data *opts)
{
const int n1 = opts->n[0];
// reference http://vt100.net/docs/vt100-ug/chapter3.html - search DECREPTPARM
if (n1 <= 1) {
apars_respond("\033["); // this is a response on request (2 would be gratuitous)
apars_respond(n1 == 0 ? "2;" : "3;");
// Parity
for(const struct DECREPTPARM_parity *p = DECREPTPARM_parity_arr; p->parity != -1; p++) {
if (p->parity == sysconf->uart_parity) {
apars_respond(p->msg);
break;
}
}
// bits per character (uart byte) - 1 = 8, 2 = 7
apars_respond(";1;");
// Baud rate
for(const struct DECREPTPARM_baud *p = DECREPTPARM_baud_arr; p->baud != -1; p++) {
if (p->baud == sysconf->uart_baudrate) {
apars_respond(p->msg);
apars_respond(";");
apars_respond(p->msg);
break;
}
}
// multiplier 1, flags 0
apars_respond(";1;0x"); // ROM cartridge number ??
}
}