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690 lines
16 KiB
690 lines
16 KiB
/**
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* ANSI code parser callbacks that do the actual work.
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* Split from the parser itself for easier editing without
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* having to deal with Ragel.
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*/
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#include <esp8266.h>
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#include "ansi_parser_callbacks.h"
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#include "screen.h"
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#include "ansi_parser.h"
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#include "uart_driver.h"
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#include "sgr.h"
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static char utf_collect[4];
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static int utf_i = 0;
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static int utf_j = 0;
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/**
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* Handle a received plain character
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* @param c - received character
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*/
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void ICACHE_FLASH_ATTR
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apars_handle_plainchar(char c)
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{
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// collecting unicode glyphs...
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if (c & 0x80) {
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if (utf_i == 0) {
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// start
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if (c == 192 || c == 193 || c >= 245) {
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// forbidden codes
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goto fail;
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}
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if ((c & 0xE0) == 0xC0) {
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utf_i = 2;
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}
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else if ((c & 0xF0) == 0xE0) {
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utf_i = 3;
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}
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else if ((c & 0xF8) == 0xF0) {
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utf_i = 4;
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}
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else {
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// chars over 127 that don't start unicode sequences
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goto fail;
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}
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utf_collect[0] = c;
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utf_j = 1;
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}
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else {
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if ((c & 0xC0) != 0x80) {
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goto fail;
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}
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else {
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utf_collect[utf_j++] = c;
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if (utf_j >= utf_i) {
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screen_putchar(utf_collect);
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apars_reset_utf8buffer();
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}
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}
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}
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}
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else {
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utf_collect[0] = c;
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utf_collect[1] = 0; // just to make sure it's closed...
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screen_putchar(utf_collect);
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}
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return;
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fail:
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ansi_warn("Bad UTF-8: %0Xh", c);
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apars_reset_utf8buffer();
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}
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/**
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* Clear the buffer where we collect pieces of a code point.
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* This is used for parser reset.
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*/
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void ICACHE_FLASH_ATTR
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apars_reset_utf8buffer(void)
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{
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utf_i = 0;
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utf_j = 0;
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memset(utf_collect, 0, 4);
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}
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/**
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* Send a response to UART0
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* @param str
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*/
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static void ICACHE_FLASH_ATTR
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respond(const char *str)
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{
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UART_WriteString(UART0, str, UART_TIMEOUT_US);
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}
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/**
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* Command to assign G0 or G1
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* @param leadchar - ( or ) for G0 or G1
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* @param c - character table ID (0, B etc)
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*/
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void ICACHE_FLASH_ATTR
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apars_handle_characterSet(char leadchar, char c)
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{
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if (leadchar == '(') screen_set_charset(0, c);
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else if (leadchar == ')') screen_set_charset(1, c);
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else {
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ansi_warn("NOIMPL: ESC %c %c", leadchar, c);
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}
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// other alternatives * + . - / not implemented
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}
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/**
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* ESC SP <c> (this sets 8/7-bit mode and some other archaic options)
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* @param c - key character
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*/
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void ICACHE_FLASH_ATTR
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apars_handle_spaceCmd(char c)
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{
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ansi_warn("NOIMPL: ESC SP %c", c);
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}
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/**
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* Beep at the user.
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*/
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void ICACHE_FLASH_ATTR
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apars_handle_bel(void)
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{
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ansi_warn("NOIMPL: BEEP");
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// TODO pass to the browser somehow
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}
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/**
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* Handle fully received CSI ANSI sequence
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* @param leadchar - private range leading character, 0 if none
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* @param params - array of CSI_N_MAX ints holding the numeric arguments
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* @param keychar - the char terminating the sequence
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*/
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void ICACHE_FLASH_ATTR
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apars_handle_CSI(char leadchar, const int *params, int count, char keychar)
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{
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int n1 = params[0];
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int n2 = params[1];
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int n3 = params[2];
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static char buf[20];
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bool yn = 0; // for ? l h
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// defaults
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switch (keychar) {
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case 'A': // move
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case 'B':
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case 'C':
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case 'D':
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case 'E':
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case 'F':
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case 'G': // set X
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case '`':
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case 'S': // scrolling
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case 'T':
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case 'X': // clear in line
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case 'd': // set Y
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case 'L':
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case 'M':
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case '@':
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case 'P':
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case 'I':
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case 'Z':
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if (n1 == 0) n1 = 1;
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break;
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case 'H':
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case 'f':
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if (n1 == 0) n1 = 1;
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if (n2 == 0) n2 = 1;
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break;
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case 'J':
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case 'K':
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if (n1 > 2) n1 = 0;
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break;
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default:
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// leave as is
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break;
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}
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switch (keychar) {
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// CUU CUD CUF CUB
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case 'a':
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case 'A': // Up
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screen_cursor_move(-n1, 0, false);
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break;
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case 'e':
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case 'B': // Down
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screen_cursor_move(n1, 0, false);
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break;
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case 'C': // Right (forward)
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screen_cursor_move(0, n1, false);
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break;
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case 'D': // Left (backward)
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screen_cursor_move(0, -n1, false);
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break;
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case 'E': // CNL - Cursor Next Line
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screen_cursor_move(n1, 0, false);
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screen_cursor_set_x(0);
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break;
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case 'F': // CPL - Cursor Prev Line
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screen_cursor_move(-n1, 0, false);
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screen_cursor_set_x(0);
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break;
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// Set X
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case 'G':
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case '`': // alternate code
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screen_cursor_set_x(n1 - 1);
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break; // 1-based
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// Set Y
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case 'd':
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screen_cursor_set_y(n1 - 1);
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break; // 1-based
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// Clear in line
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case 'X':
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screen_clear_in_line(n1);
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break; // 1-based
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// SU, SD - scroll up/down
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case 'S': screen_scroll_up(n1); break;
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case 'T': screen_scroll_down(n1); break;
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// CUP,HVP - set position
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case 'H':
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case 'f':
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screen_cursor_set(n1-1, n2-1);
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break; // 1-based
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case 'J': // Erase screen
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if (n1 == 0) {
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screen_clear(CLEAR_FROM_CURSOR);
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} else if (n1 == 1) {
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screen_clear(CLEAR_TO_CURSOR);
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} else {
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screen_clear(CLEAR_ALL);
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screen_cursor_set(0, 0);
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}
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break;
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case 'K': // Erase lines
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if (n1 == 0) {
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screen_clear_line(CLEAR_FROM_CURSOR);
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} else if (n1 == 1) {
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screen_clear_line(CLEAR_TO_CURSOR);
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} else {
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screen_clear_line(CLEAR_ALL);
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}
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break;
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// SCP, RCP - save/restore position
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case 's': screen_cursor_save(0); break;
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case 'u': screen_cursor_restore(0); break;
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case 'n': // Queries
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if (n1 == 6) {
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// Query cursor position
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int x, y;
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screen_cursor_get(&y, &x);
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sprintf(buf, "\033[%d;%dR", y+1, x+1);
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respond(buf);
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}
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else if (n1 == 5) {
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// Query device status - reply "Device is OK"
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respond("\033[0n");
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}
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else {
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ansi_warn("NOIMPL: CSI %d n", n1);
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}
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break;
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case 'h': // DEC feature enable
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yn = 1;
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case 'l': // DEC feature disable
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for (int i = 0; i < count; i++) {
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int n = params[i];
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if (leadchar == '?') {
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if (n == 1) {
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screen_set_cursors_alt_mode(yn);
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}
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else if (n == 6) {
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// TODO origin mode (scrolling region)
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}
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else if (n == 7) {
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screen_wrap_enable(yn);
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}
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else if (n == 8) {
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// Key auto-repeat
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// We don't implement this currently, but it could be added
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// - discard repeated keypress events between keydown and keyup.
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}
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else if (n == 9 || (n >= 1000 && n <= 1006)) {
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// TODO mouse
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// 1000 - C11 mouse - Send Mouse X & Y on button press and release.
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// 1001 - Hilite mouse tracking
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// 1002 - Cell Motion Mouse Tracking
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// 1003 - All Motion Mouse Tracking
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// 1004 - Send FocusIn/FocusOut events
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// 1005 - Enable UTF-8 Mouse Mode
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// 1006 - SGR mouse mode
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}
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else if (n == 12) {
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// TODO Cursor blink on/off
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}
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else if (n == 1049) {
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// XTERM: optionally switch to/from alternate screen
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// We can't implement this because of limited RAM size
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}
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else if (n == 2004) {
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// Bracketed paste mode
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// Discard, we don't implement this
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}
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else if (n == 25) {
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screen_cursor_visible(yn);
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}
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else {
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ansi_warn("NOIMPL: CSI ? %d %c", n, keychar);
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}
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}
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else {
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if (n == 4) {
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screen_set_insert_mode(yn);
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}
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else if (n == 20) {
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screen_set_newline_mode(yn);
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}
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else {
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ansi_warn("NOIMPL: CSI %d %c", n, keychar);
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}
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}
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}
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break;
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case 'm': // SGR - set graphics rendition
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if (count == 0) {
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count = 1; // this makes it work as 0 (reset)
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}
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// iterate arguments
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for (int i = 0; i < count; i++) {
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int n = params[i];
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if (n == SGR_RESET) screen_reset_sgr();
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// -- set color --
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else if (n >= SGR_FG_START && n <= SGR_FG_END) screen_set_fg((Color) (n - SGR_FG_START)); // ANSI normal fg
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else if (n >= SGR_BG_START && n <= SGR_BG_END) screen_set_bg((Color) (n - SGR_BG_START)); // ANSI normal bg
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else if (n == SGR_FG_DEFAULT) screen_set_fg(termconf_scratch.default_fg); // default fg
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else if (n == SGR_BG_DEFAULT) screen_set_bg(termconf_scratch.default_bg); // default bg
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// -- set attr --
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else if (n == SGR_BOLD) screen_attr_enable(ATTR_BOLD);
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else if (n == SGR_FAINT) screen_attr_enable(ATTR_FAINT);
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else if (n == SGR_ITALIC) screen_attr_enable(ATTR_ITALIC);
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else if (n == SGR_UNDERLINE) screen_attr_enable(ATTR_UNDERLINE);
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else if (n == SGR_BLINK || n == SGR_BLINK_FAST) screen_attr_enable(ATTR_BLINK); // 6 - rapid blink, not supported
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else if (n == SGR_INVERSE) screen_inverse_enable(true);
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else if (n == SGR_STRIKE) screen_attr_enable(ATTR_STRIKE);
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else if (n == SGR_FRAKTUR) screen_attr_enable(ATTR_FRAKTUR);
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// -- clear attr --
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else if (n == SGR_OFF(SGR_BOLD)) screen_attr_disable(ATTR_BOLD);
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else if (n == SGR_OFF(SGR_FAINT)) screen_attr_disable(ATTR_FAINT);
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else if (n == SGR_OFF(SGR_ITALIC)) screen_attr_disable(ATTR_ITALIC|ATTR_FRAKTUR);
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else if (n == SGR_OFF(SGR_UNDERLINE)) screen_attr_disable(ATTR_UNDERLINE);
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else if (n == SGR_OFF(SGR_BLINK)) screen_attr_disable(ATTR_BLINK);
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else if (n == SGR_OFF(SGR_INVERSE)) screen_inverse_enable(false);
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else if (n == SGR_OFF(SGR_STRIKE)) screen_attr_disable(ATTR_STRIKE);
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// -- AIX bright colors --
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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
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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
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else {
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ansi_warn("NOIMPL: SGR %d", n);
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}
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}
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break;
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case 't': // xterm window hacks
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switch(n1) {
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case 8: // set size
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screen_resize(n2, n3);
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break;
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case 18: // report size
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printf(buf, "\033[8;%d;%dt", termconf_scratch.height, termconf_scratch.width);
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respond(buf);
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break;
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case 11: // Report iconified -> is not iconified
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respond("\033[1t");
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break;
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case 21: // Report title
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respond("\033]L");
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respond(termconf_scratch.title);
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respond("\033\\");
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break;
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case 24: // Set Height only
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screen_resize(n2, termconf_scratch.width);
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break;
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default:
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ansi_warn("NOIMPL CSI %d t", n1);
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break;
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}
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break;
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case 'L': // Insert lines (shove down)
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screen_insert_lines(n1);
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break;
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case 'M': // Delete lines (pull up)
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screen_delete_lines(n1);
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break;
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case '@': // Insert in line (shove right)
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screen_insert_characters(n1);
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break;
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case 'P': // Delete in line (pull left)
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screen_delete_characters(n1);
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break;
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case 'r':
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// TODO scrolling region
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break;
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case 'g': // Clear tabs
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if (n1 == 3) {
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screen_clear_all_tabs();
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} else {
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screen_clear_tab();
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}
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break;
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case 'Z': // Tab backward
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for(; n1 > 0; n1--) {
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screen_tab_reverse();
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}
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break;
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case 'I': // Tab forward
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for(; n1 > 0; n1--) {
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screen_tab_forward();
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}
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break;
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case 'c': // CSI-c - report capabilities
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respond("\033[?64;22;c"); // pretend we're vt400
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break;
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default:
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ansi_warn("NOIMPL: CSI Pm %c", keychar);
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apars_handle_badseq();
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}
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}
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/**
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* Codes in the format ESC # n
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* @param c - the trailing symbol (numeric ASCII)
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*/
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void ICACHE_FLASH_ATTR apars_handle_hashCode(char c)
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{
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switch(c) {
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case '8':
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screen_fill_with_E();
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break;
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default:
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ansi_warn("NOIMPL: ESC # %c", c);
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}
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}
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/**
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* Single-character escape codes (ESC x)
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* @param c - the trailing symbol (ASCII)
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*/
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void ICACHE_FLASH_ATTR apars_handle_shortCode(char c)
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{
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switch(c) {
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case 'c': // screen reset
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screen_reset();
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break;
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case '7': // save cursor + attributes
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screen_cursor_save(true);
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break;
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case '8': // restore cursor + attributes
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screen_cursor_restore(true);
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break;
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case 'E': // same as CR LF
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screen_cursor_move(1, 0, false);
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screen_cursor_set_x(0);
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break;
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case 'F': // bottom left
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screen_cursor_set(termconf_scratch.height-1, 0);
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break;
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case 'D': // move cursor down, scroll screen up if needed
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screen_cursor_move(1, 0, true);
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break;
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case 'M': // move cursor up, scroll screen down if needed
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screen_cursor_move(-1, 0, true);
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break;
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case 'H':
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screen_set_tab();
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break;
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case '>':
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screen_set_numpad_alt_mode(false);
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break;
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case '<': // "Enter ANSI / VT100 mode" - no-op (we don't support VT52 mode)
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break;
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case '=':
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screen_set_numpad_alt_mode(true);
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break;
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case '|': // Invoke the G3 Character Set as GR (LS3R).
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case '}': // Invoke the G2 Character Set as GR (LS2R).
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case '~': // Invoke the G1 Character Set as GR (LS1R).
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// Those do not seem to do anything TODO investigate
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break;
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case '@': // no-op padding char (?)
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break;
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case '\\': // spurious string terminator
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break;
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default:
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ansi_warn("NOIMPL: ESC %c", c);
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}
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}
|
|
|
|
/**
|
|
* Helper function to set terminal title
|
|
* @param str - title text
|
|
*/
|
|
static void ICACHE_FLASH_ATTR
|
|
set_title(const char *str)
|
|
{
|
|
strncpy(termconf_scratch.title, str, TERM_TITLE_LEN);
|
|
screen_notifyChange(CHANGE_LABELS);
|
|
}
|
|
|
|
/**
|
|
* Helper function to set terminal button label
|
|
* @param num - button number 1-5
|
|
* @param str - button text
|
|
*/
|
|
static void ICACHE_FLASH_ATTR
|
|
set_button_text(int num, const char *str)
|
|
{
|
|
strncpy(termconf_scratch.btn[num-1], str, TERM_BTN_LEN);
|
|
screen_notifyChange(CHANGE_LABELS);
|
|
}
|
|
|
|
/**
|
|
* Helper function to parse incoming OSC (Operating System Control)
|
|
* @param buffer - the OSC body (after OSC and before ST)
|
|
*/
|
|
static void ICACHE_FLASH_ATTR
|
|
parse_osc(const char *buffer)
|
|
{
|
|
const char *orig_buff = buffer;
|
|
int n = 0;
|
|
char c = 0;
|
|
while ((c = *buffer++) != 0) {
|
|
if (c >= '0' && c <= '9') {
|
|
n = (n * 10 + (c - '0'));
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (c == ';') {
|
|
// Do something with the data string and number
|
|
// (based on xterm manpage)
|
|
if (n == 0 || n == 2) set_title(buffer);
|
|
else if (n >= 81 && n <= 85) { // numbers chosen to not collide with any xterm supported codes
|
|
set_button_text(n - 80, buffer);
|
|
}
|
|
else {
|
|
ansi_warn("NOIMPL: OSC %d ; %s ST", n, buffer);
|
|
}
|
|
}
|
|
else {
|
|
ansi_warn("BAD OSC: %s", orig_buff);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Helper function to parse incoming DCS (Device Control String)
|
|
* @param buffer - the DCS body (after DCS and before ST)
|
|
*/
|
|
static void ICACHE_FLASH_ATTR
|
|
parse_dcs(const char *buffer)
|
|
{
|
|
char buf[64]; // just about big enough for full-house SGR
|
|
size_t len = strlen(buffer);
|
|
if ((len == 3 || len == 4) && strneq(buffer, "$q", 2)) {
|
|
// DECRQSS - Request Status String
|
|
if (strneq(buffer+2, "\"p", 2)) {
|
|
// DECSCL - Select Conformance Level
|
|
respond("\033[P1$r64;1\"p\033\\"); // 64;1 - Pretend we are VT400 with 7-bit characters
|
|
}
|
|
else if (strneq(buffer+2, "\"q", 2)) {
|
|
// DECSCA - Select character protection attribute
|
|
sprintf(buf, "\033[P1$r%d\"q\033\\", 0); // 0 - Can erase - TODO real protection status if implemented
|
|
respond(buf);
|
|
}
|
|
else if (buffer[2] == 'r') {
|
|
// DECSTBM - Query scrolling region
|
|
sprintf(buf, "\033[P1$r%d;%dr\033\\", 1, termconf_scratch.height); // 1-80 TODO real extent of scrolling region
|
|
respond(buf);
|
|
}
|
|
else if (buffer[2] == 's') {
|
|
// DECSLRM - Query horizontal margins
|
|
sprintf(buf, "\033[P1$r%d;%ds\033\\", 1, termconf_scratch.width); // Can erase - TODO real extent of horiz margins if implemented
|
|
respond(buf);
|
|
}
|
|
else if (buffer[2] == 'm') {
|
|
// SGR - query SGR
|
|
respond("\033[P1$r");
|
|
screen_report_sgr(buf);
|
|
respond(buf);
|
|
respond("m\033\\");
|
|
}
|
|
else if (strneq(buffer+2, " q", 2)) {
|
|
// DECSCUSR - Query cursor style
|
|
sprintf(buf, "\033[P1$r%d q\033\\", 1);
|
|
/*
|
|
Ps = 0 -> blinking block.
|
|
Ps = 1 -> blinking block (default).
|
|
Ps = 2 -> steady block.
|
|
Ps = 3 -> blinking underline.
|
|
Ps = 4 -> steady underline.
|
|
Ps = 5 -> blinking bar (xterm).
|
|
Ps = 6 -> steady bar (xterm).
|
|
*/
|
|
respond(buf);
|
|
}
|
|
else {
|
|
// invalid query
|
|
ansi_warn("NOIMPL: DCS %s ST", buffer);
|
|
sprintf(buf, "\033[P0$r%s\033\\", buffer+2);
|
|
}
|
|
}
|
|
else {
|
|
ansi_warn("NOIMPL: DCS %s ST", buffer);
|
|
}
|
|
}
|
|
|
|
void ICACHE_FLASH_ATTR
|
|
apars_handle_StrCmd(char leadchar, const char *buffer)
|
|
{
|
|
switch (leadchar) {
|
|
case 'k': // ESC k TITLE ST (defined in GNU screen manpage)
|
|
set_title(buffer);
|
|
break;
|
|
case ']': // OSC - Operating System Command
|
|
parse_osc(buffer);
|
|
break;
|
|
case 'P': // DCS - Device Control String
|
|
parse_dcs(buffer);
|
|
break;
|
|
case '^': // PM - Privacy Message
|
|
break;
|
|
case '_': // APC - Application Program Command
|
|
break;
|
|
case 'X': // SOS - Start of String (purpose unclear)
|
|
break;
|
|
default:
|
|
ansi_warn("NOIMPL: ESC %c Pt ST", leadchar);
|
|
}
|
|
}
|
|
|