kovidgoyal/kitty
1
1
Fork 0
mirror of https://github.com/kovidgoyal/kitty.git synced 2024-09-22 03:57:30 +03:00
Code Issues Projects Releases Wiki Activity
12658c4756
kitty/kitty/parser.c
Kovid Goyal d452a5cdce
...
2022-03-03 21:24:43 +05:30

1594 lines
56 KiB
C
Raw Blame History

/*
* Copyright (C) 2016 Kovid Goyal <kovid at kovidgoyal.net>
*
* Distributed under terms of the GPL3 license.
*/
// Need _POSIX_C_SOURCE for strtok_r
#define _POSIX_C_SOURCE 200809L
#include "data-types.h"
#include "control-codes.h"
#include "screen.h"
#include "graphics.h"
#include "charsets.h"
#include "monotonic.h"
#include <time.h>
extern PyTypeObject Screen_Type;
#define EXTENDED_OSC_SENTINEL 0x1bu
#define PENDING_BUF_INCREMENT (16u * 1024u)
// utils {{{
static const uint64_t pow_10_array[] = {
1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000, 10000000000
};
static int64_t
utoi(const uint32_t *buf, unsigned int sz) {
int64_t ans = 0;
const uint32_t *p = buf;
int mult = 1;
if (sz && *p == '-') {
mult = -1; p++; sz--;
}
// Ignore leading zeros
while(sz > 0) {
if (*p == '0') { p++; sz--; }
else break;
}
if (sz < sizeof(pow_10_array)/sizeof(pow_10_array[0])) {
for (int i = sz-1, j=0; i >= 0; i--, j++) {
ans += (p[i] - '0') * pow_10_array[j];
}
}
return ans * mult;
}
static const char*
utf8(char_type codepoint) {
if (!codepoint) return "";
static char buf[8];
int n = encode_utf8(codepoint, buf);
buf[n] = 0;
return buf;
}
// }}}
// Macros {{{
#define IS_DIGIT \
case '0': \
case '1': \
case '2': \
case '3': \
case '4': \
case '5': \
case '6': \
case '7': \
case '8': \
case '9':
#ifdef DUMP_COMMANDS
static void
_report_error(PyObject *dump_callback, const char *fmt, ...) {
va_list argptr;
va_start(argptr, fmt);
PyObject *temp = PyUnicode_FromFormatV(fmt, argptr);
va_end(argptr);
if (temp != NULL) {
Py_XDECREF(PyObject_CallFunctionObjArgs(dump_callback, temp, NULL)); PyErr_Clear();
Py_CLEAR(temp);
}
}
static void
_report_params(PyObject *dump_callback, const char *name, int *params, unsigned int count, Region *r) {
static char buf[MAX_PARAMS*3] = {0};
unsigned int i, p=0;
if (r) p += snprintf(buf + p, sizeof(buf) - 2, "%u %u %u %u ", r->top, r->left, r->bottom, r->right);
for(i = 0; i < count && p < MAX_PARAMS*3-20; i++) {
int n = snprintf(buf + p, MAX_PARAMS*3 - p, "%i ", params[i]);
if (n < 0) break;
p += n;
}
buf[p] = 0;
Py_XDECREF(PyObject_CallFunction(dump_callback, "ss", name, buf)); PyErr_Clear();
}
#define DUMP_UNUSED
#define REPORT_ERROR(...) _report_error(dump_callback, __VA_ARGS__);
#define REPORT_COMMAND1(name) \
Py_XDECREF(PyObject_CallFunction(dump_callback, "s", #name)); PyErr_Clear();
#define REPORT_COMMAND2(name, x) \
Py_XDECREF(PyObject_CallFunction(dump_callback, "si", #name, (int)x)); PyErr_Clear();
#define REPORT_COMMAND3(name, x, y) \
Py_XDECREF(PyObject_CallFunction(dump_callback, "sii", #name, (int)x, (int)y)); PyErr_Clear();
#define GET_MACRO(_1,_2,_3,NAME,...) NAME
#define REPORT_COMMAND(...) GET_MACRO(__VA_ARGS__, REPORT_COMMAND3, REPORT_COMMAND2, REPORT_COMMAND1, SENTINEL)(__VA_ARGS__)
#define REPORT_VA_COMMAND(...) Py_XDECREF(PyObject_CallFunction(dump_callback, __VA_ARGS__)); PyErr_Clear();
#define REPORT_DRAW(ch) \
Py_XDECREF(PyObject_CallFunction(dump_callback, "sC", "draw", ch)); PyErr_Clear();
#define REPORT_PARAMS(name, params, num, region) _report_params(dump_callback, name, params, num_params, region)
#define FLUSH_DRAW \
Py_XDECREF(PyObject_CallFunction(dump_callback, "sO", "draw", Py_None)); PyErr_Clear();
#define REPORT_OSC(name, string) \
Py_XDECREF(PyObject_CallFunction(dump_callback, "sO", #name, string)); PyErr_Clear();
#define REPORT_OSC2(name, code, string) \
Py_XDECREF(PyObject_CallFunction(dump_callback, "siO", #name, code, string)); PyErr_Clear();
#define REPORT_HYPERLINK(id, url) \
Py_XDECREF(PyObject_CallFunction(dump_callback, "szz", "set_active_hyperlink", id, url)); PyErr_Clear();
#else
#define DUMP_UNUSED UNUSED
#define REPORT_ERROR(...) log_error(ERROR_PREFIX " " __VA_ARGS__);
#define REPORT_COMMAND(...)
#define REPORT_VA_COMMAND(...)
#define REPORT_DRAW(ch)
#define REPORT_PARAMS(...)
#define FLUSH_DRAW
#define REPORT_OSC(name, string)
#define REPORT_OSC2(name, code, string)
#define REPORT_HYPERLINK(id, url)
#endif
#define SET_STATE(state) screen->parser_state = state; screen->parser_buf_pos = 0;
// }}}
// Normal mode {{{
static void
screen_nel(Screen *screen) { screen_carriage_return(screen); screen_linefeed(screen); }
static void
dispatch_normal_mode_char(Screen *screen, uint32_t ch, PyObject DUMP_UNUSED *dump_callback) {
#define CALL_SCREEN_HANDLER(name) REPORT_COMMAND(name); name(screen); break;
switch(ch) {
case BEL:
CALL_SCREEN_HANDLER(screen_bell);
case BS:
CALL_SCREEN_HANDLER(screen_backspace);
case HT:
CALL_SCREEN_HANDLER(screen_tab);
case NEL:
CALL_SCREEN_HANDLER(screen_nel);
case LF:
case VT:
case FF:
CALL_SCREEN_HANDLER(screen_linefeed);
case CR:
CALL_SCREEN_HANDLER(screen_carriage_return);
case SI:
REPORT_COMMAND(screen_change_charset, 0);
screen_change_charset(screen, 0); break;
case SO:
REPORT_COMMAND(screen_change_charset, 1);
screen_change_charset(screen, 1); break;
case IND:
CALL_SCREEN_HANDLER(screen_index);
case RI:
CALL_SCREEN_HANDLER(screen_reverse_index);
case HTS:
CALL_SCREEN_HANDLER(screen_set_tab_stop);
case ESC:
case CSI:
case OSC:
case DCS:
case APC:
case PM:
SET_STATE(ch); break;
case NUL:
case DEL:
break; // no-op
default:
REPORT_DRAW(ch);
screen_draw(screen, ch, true);
break;
}
#undef CALL_SCREEN_HANDLER
} // }}}
// Esc mode {{{
static void
dispatch_esc_mode_char(Screen *screen, uint32_t ch, PyObject DUMP_UNUSED *dump_callback) {
#define CALL_ED(name) REPORT_COMMAND(name); name(screen); SET_STATE(0);
#define CALL_ED1(name, ch) REPORT_COMMAND(name, ch); name(screen, ch); SET_STATE(0);
#define CALL_ED2(name, a, b) REPORT_COMMAND(name, a, b); name(screen, a, b); SET_STATE(0);
switch(screen->parser_buf_pos) {
case 0:
switch (ch) {
case ESC_DCS:
SET_STATE(DCS); break;
case ESC_OSC:
SET_STATE(OSC); break;
case ESC_CSI:
SET_STATE(CSI); break;
case ESC_APC:
SET_STATE(APC); break;
case ESC_PM:
SET_STATE(PM); break;
case ESC_RIS:
CALL_ED(screen_reset); break;
case ESC_IND:
CALL_ED(screen_index); break;
case ESC_NEL:
CALL_ED(screen_nel); break;
case ESC_RI:
CALL_ED(screen_reverse_index); break;
case ESC_HTS:
CALL_ED(screen_set_tab_stop); break;
case ESC_DECSC:
CALL_ED(screen_save_cursor); break;
case ESC_DECRC:
CALL_ED(screen_restore_cursor); break;
case ESC_DECKPNM:
CALL_ED(screen_normal_keypad_mode); break;
case ESC_DECKPAM:
CALL_ED(screen_alternate_keypad_mode); break;
case '%':
case '(':
case ')':
case '*':
case '+':
case '-':
case '.':
case '/':
case ' ':
case '#':
screen->parser_buf[screen->parser_buf_pos++] = ch;
break;
default:
REPORT_ERROR("%s0x%x", "Unknown char after ESC: ", ch);
SET_STATE(0); break;
}
break;
default:
switch(screen->parser_buf[0]) {
case '%':
switch(ch) {
case '@':
REPORT_COMMAND(screen_use_latin1, 1);
screen_use_latin1(screen, true);
break;
case 'G':
REPORT_COMMAND(screen_use_latin1, 0);
screen_use_latin1(screen, false);
break;
default:
REPORT_ERROR("Unhandled Esc %% code: 0x%x", ch); break;
}
break;
case '#':
if (ch == '8') { CALL_ED(screen_align); }
else { REPORT_ERROR("Unhandled Esc # code: 0x%x", ch); }
break;
case '(':
case ')':
switch(ch) {
case 'A':
case 'B':
case '0':
case 'U':
case 'V':
CALL_ED2(screen_designate_charset, screen->parser_buf[0] - '(', ch); break;
default:
REPORT_ERROR("Unknown charset: 0x%x", ch); break;
}
break;
case ' ':
switch(ch) {
case 'F':
case 'G':
REPORT_COMMAND(screen_set_8bit_controls, ch == 'G');
screen_set_8bit_controls(screen, ch == 'G');
break;
default:
REPORT_ERROR("Unhandled ESC SP escape code: 0x%x", ch); break;
}
break;
default:
REPORT_ERROR("Unhandled charset related escape code: 0x%x 0x%x", screen->parser_buf[0], ch); break;
}
SET_STATE(0);
break;
}
#undef CALL_ED
#undef CALL_ED1
} // }}}
// OSC mode {{{
static bool
parse_osc_8(char *buf, char **id, char **url) {
char *boundary = strstr(buf, ";");
if (boundary == NULL) return false;
*boundary = 0;
if (*(boundary + 1)) *url = boundary + 1;
char *save = NULL, *token = strtok_r(buf, ":", &save);
while (token != NULL) {
size_t len = strlen(token);
if (len > 3 && token[0] == 'i' && token[1] == 'd' && token[2] == '=' && token[3]) {
*id = token + 3;
break;
}
token = strtok_r(NULL, ":", &save);
}
return true;
}
static void
dispatch_hyperlink(Screen *screen, size_t pos, size_t size, PyObject DUMP_UNUSED *dump_callback) {
// since the spec says only ASCII printable chars are allowed in OSC 8, we
// can just convert to char* directly
if (!size) return; // ignore empty OSC 8 since it must have two semi-colons to be valid, which means one semi-colon here
char *id = NULL, *url = NULL;
char *data = malloc(size + 1);
if (!data) fatal("Out of memory");
for (size_t i = 0; i < size; i++) {
data[i] = screen->parser_buf[i + pos] & 0x7f;
if (data[i] < 32 || data[i] > 126) data[i] = '_';
}
data[size] = 0;
if (parse_osc_8(data, &id, &url)) {
REPORT_HYPERLINK(id, url);
set_active_hyperlink(screen, id, url);
} else {
REPORT_ERROR("Ignoring malformed OSC 8 code");
}
free(data);
}
static void
continue_osc_52(Screen *screen) {
screen->parser_buf[0] = '5'; screen->parser_buf[1] = '2'; screen->parser_buf[2] = ';';
screen->parser_buf[3] = ';'; screen->parser_buf_pos = 4;
}
static bool
is_extended_osc(const Screen *screen) {
return screen->parser_buf_pos > 2 && screen->parser_buf[0] == EXTENDED_OSC_SENTINEL && screen->parser_buf[1] == 1 && screen->parser_buf[2] == ';';
}
static void
dispatch_osc(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
#define DISPATCH_OSC_WITH_CODE(name) REPORT_OSC2(name, code, string); name(screen, code, string);
#define DISPATCH_OSC(name) REPORT_OSC(name, string); name(screen, string);
#define START_DISPATCH {\
PyObject *string = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND, screen->parser_buf + i, limit - i); \
if (string) {
#define END_DISPATCH Py_CLEAR(string); } PyErr_Clear(); break; }
const unsigned int limit = screen->parser_buf_pos;
int code=0;
unsigned int i;
for (i = 0; i < MIN(limit, 5u); i++) {
if (screen->parser_buf[i] < '0' || screen->parser_buf[i] > '9') break;
}
if (i > 0) {
code = utoi(screen->parser_buf, i);
if (i < limit && screen->parser_buf[i] == ';') i++;
} else {
if (is_extended_osc(screen)) {
// partial OSC 52
i = 3;
code = -52;
}
}
switch(code) {
case 0:
START_DISPATCH
DISPATCH_OSC(set_title);
DISPATCH_OSC(set_icon);
END_DISPATCH
case 1:
START_DISPATCH
DISPATCH_OSC(set_icon);
END_DISPATCH
case 2:
START_DISPATCH
DISPATCH_OSC(set_title);
END_DISPATCH
case 4:
case 104:
START_DISPATCH
DISPATCH_OSC_WITH_CODE(set_color_table_color);
END_DISPATCH
case 7:
START_DISPATCH
DISPATCH_OSC_WITH_CODE(process_cwd_notification);
END_DISPATCH
case 8:
dispatch_hyperlink(screen, i, limit-i, dump_callback);
break;
case 9:
case 99:
case 777:
START_DISPATCH
DISPATCH_OSC_WITH_CODE(desktop_notify)
END_DISPATCH
case 10:
case 11:
case 12:
case 17:
case 19:
case 110:
case 111:
case 112:
case 117:
case 119:
START_DISPATCH
DISPATCH_OSC_WITH_CODE(set_dynamic_color);
END_DISPATCH
case 52:
case -52:
START_DISPATCH
DISPATCH_OSC_WITH_CODE(clipboard_control);
if (code == -52) continue_osc_52(screen);
END_DISPATCH
case 133:
START_DISPATCH
DISPATCH_OSC(shell_prompt_marking);
END_DISPATCH
case FILE_TRANSFER_CODE:
START_DISPATCH
DISPATCH_OSC(file_transmission);
END_DISPATCH
case 30001:
REPORT_COMMAND(screen_push_dynamic_colors);
screen_push_colors(screen, 0);
break;
case 30101:
REPORT_COMMAND(screen_pop_dynamic_colors);
screen_pop_colors(screen, 0);
break;
default:
REPORT_ERROR("Unknown OSC code: %u", code);
break;
}
#undef DISPATCH_OSC
#undef DISPATCH_OSC_WITH_CODE
#undef START_DISPATCH
#undef END_DISPATCH
}
// }}}
// CSI mode {{{
// As per ECMA 48 section 5.4 secondary byte is column 02 of the 7-bit ascii table
#define CSI_SECONDARY \
case ' ': \
case '!': \
case '"': \
case '#': \
case '$': \
case '%': \
case '&': \
case '\'': \
case '(': \
case ')': \
case '*': \
case '+': \
case ',': \
case '-': \
case '.': \
case '/':
static void
screen_cursor_up2(Screen *s, unsigned int count) { screen_cursor_up(s, count, false, -1); }
static void
screen_cursor_back1(Screen *s, unsigned int count) { screen_cursor_back(s, count, -1); }
static void
screen_tabn(Screen *s, unsigned int count) { for (index_type i=0; i < MAX(1u, count); i++) screen_tab(s); }
static const char*
repr_csi_params(int *params, unsigned int num_params) {
if (!num_params) return "";
static char buf[256];
unsigned int pos = 0, i = 0;
while (pos < 200 && i++ < num_params && sizeof(buf) > pos + 1) {
const char *fmt = i < num_params ? "%i, " : "%i";
int ret = snprintf(buf + pos, sizeof(buf) - pos - 1, fmt, params[i-1]);
if (ret < 0) return "An error occurred formatting the params array";
pos += ret;
}
buf[pos] = 0;
return buf;
}
#ifdef DUMP_COMMANDS
static
#endif
void
parse_sgr(Screen *screen, uint32_t *buf, unsigned int num, int *params, PyObject DUMP_UNUSED *dump_callback, const char *report_name DUMP_UNUSED, Region *region) {
enum State { START, NORMAL, MULTIPLE, COLOR, COLOR1, COLOR3 };
enum State state = START;
unsigned int num_params, num_start, i;
#define READ_PARAM { params[num_params++] = utoi(buf + num_start, i - num_start); }
#define SEND_SGR { REPORT_PARAMS(report_name, params, num_params, region); select_graphic_rendition(screen, params, num_params, region); state = START; num_params = 0; }
for (i=0, num_start=0, num_params=0; i < num && num_params < MAX_PARAMS; i++) {
switch(buf[i]) {
IS_DIGIT
switch(state) {
case START:
num_start = i;
state = NORMAL;
num_params = 0;
break;
default:
break;
}
break;
case ';':
switch(state) {
case START:
params[num_params++] = 0;
SEND_SGR;
break;
case NORMAL:
READ_PARAM;
switch(params[0]) {
case 38:
case 48:
case 58:
state = COLOR;
num_start = i + 1;
break;
default:
SEND_SGR;
break;
}
break;
case MULTIPLE:
READ_PARAM;
SEND_SGR;
break;
case COLOR:
READ_PARAM;
switch(params[1]) {
case 2:
state = COLOR3;
break;
case 5:
state = COLOR1;
break;
default:
REPORT_ERROR("Invalid SGR color code with unknown color type: %u", params[1]);
return;
}
num_start = i + 1;
break;
case COLOR1:
READ_PARAM;
SEND_SGR;
break;
case COLOR3:
READ_PARAM;
if (num_params == 5) { SEND_SGR; }
else num_start = i + 1;
break;
}
break;
case ':':
switch(state) {
case START:
REPORT_ERROR("Invalid SGR code containing ':' at an invalid location: %u", i);
return;
case NORMAL:
READ_PARAM;
state = MULTIPLE;
num_start = i + 1;
break;
case MULTIPLE:
READ_PARAM;
num_start = i + 1;
break;
case COLOR:
case COLOR1:
case COLOR3:
REPORT_ERROR("Invalid SGR code containing disallowed character: %s", utf8(buf[i]));
return;
}
break;
default:
REPORT_ERROR("Invalid SGR code containing disallowed character: %s", utf8(buf[i]));
return;
}
}
switch(state) {
case START:
if (num_params < MAX_PARAMS) params[num_params++] = 0;
SEND_SGR;
break;
case COLOR1:
case NORMAL:
case MULTIPLE:
if (i > num_start && num_params < MAX_PARAMS) { READ_PARAM; }
if (num_params) { SEND_SGR; }
else { REPORT_ERROR("Incomplete SGR code"); }
break;
case COLOR:
REPORT_ERROR("Invalid SGR code containing incomplete semi-colon separated color sequence");
break;
case COLOR3:
if (i > num_start && num_params < MAX_PARAMS) READ_PARAM;
if (num_params != 5) {
REPORT_ERROR("Invalid SGR code containing incomplete semi-colon separated color sequence");
break;
}
if (num_params) { SEND_SGR; }
else { REPORT_ERROR("Incomplete SGR code"); }
break;
}
#undef READ_PARAM
#undef SEND_SGR
}
static unsigned int
parse_region(Region *r, uint32_t *buf, unsigned int num) {
unsigned int i, start, num_params = 0;
int params[8] = {0};
for (i=0, start=0; i < num && num_params < 4; i++) {
switch(buf[i]) {
IS_DIGIT
break;
default:
if (i > start) params[num_params++] = utoi(buf + start, i - start);
else if (i == start && buf[i] == ';') params[num_params++] = 0;
start = i + 1;
break;
}
}
switch(num_params) {
case 0:
break;
case 1:
r->top = params[0];
break;
case 2:
r->top = params[0]; r->left = params[1];
break;
case 3:
r->top = params[0]; r->left = params[1]; r->bottom = params[2];
break;
default:
r->top = params[0]; r->left = params[1]; r->bottom = params[2]; r->right = params[3];
break;
}
return i;
}
static const char*
csi_letter(unsigned code) {
static char buf[8];
if (33 <= code && code <= 126) snprintf(buf, sizeof(buf), "%c", code);
else snprintf(buf, sizeof(buf), "0x%x", code);
return buf;
}
static void
dispatch_csi(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
#define AT_MOST_ONE_PARAMETER { \
if (num_params > 1) { \
REPORT_ERROR("CSI code %s has %u > 1 parameters", csi_letter(code), num_params); \
break; \
} \
}
#define NON_NEGATIVE_PARAM(x) { \
if (x < 0) { \
REPORT_ERROR("CSI code %s is not allowed to have negative parameter (%d)", csi_letter(code), x); \
break; \
} \
}
#define CALL_CSI_HANDLER1(name, defval) \
AT_MOST_ONE_PARAMETER; \
p1 = num_params > 0 ? params[0] : defval; \
NON_NEGATIVE_PARAM(p1); \
REPORT_COMMAND(name, p1); \
name(screen, p1); \
break;
#define CALL_CSI_HANDLER1P(name, defval, qch) \
AT_MOST_ONE_PARAMETER; \
p1 = num_params > 0 ? params[0] : defval; \
NON_NEGATIVE_PARAM(p1); \
private = start_modifier == qch; \
REPORT_COMMAND(name, p1, private); \
name(screen, p1, private); \
break;
#define CALL_CSI_HANDLER1S(name, defval) \
AT_MOST_ONE_PARAMETER; \
p1 = num_params > 0 ? params[0] : defval; \
NON_NEGATIVE_PARAM(p1); \
REPORT_COMMAND(name, p1, start_modifier); \
name(screen, p1, start_modifier); \
break;
#define CALL_CSI_HANDLER1M(name, defval) \
AT_MOST_ONE_PARAMETER; \
p1 = num_params > 0 ? params[0] : defval; \
NON_NEGATIVE_PARAM(p1); \
REPORT_COMMAND(name, p1, end_modifier); \
name(screen, p1, end_modifier); \
break;
#define CALL_CSI_HANDLER2(name, defval1, defval2) \
if (num_params > 2) { \
REPORT_ERROR("CSI code %s has %u > 2 parameters", csi_letter(code), num_params); \
break; \
} \
p1 = num_params > 0 ? params[0] : defval1; \
p2 = num_params > 1 ? params[1] : defval2; \
NON_NEGATIVE_PARAM(p1); \
NON_NEGATIVE_PARAM(p2); \
REPORT_COMMAND(name, p1, p2); \
name(screen, p1, p2); \
break;
#define SET_MODE(func) \
p1 = start_modifier == '?' ? 5 : 0; \
for (i = 0; i < num_params; i++) { \
NON_NEGATIVE_PARAM(params[i]); \
REPORT_COMMAND(func, params[i], start_modifier == '?'); \
func(screen, params[i] << p1); \
} \
break;
#define NO_MODIFIERS(modifier, special, special_msg) { \
if (start_modifier || end_modifier) { \
if (special && modifier == special) { REPORT_ERROR(special_msg); } \
else { REPORT_ERROR("CSI code %s has unsupported start modifier: %s or end modifier: %s", csi_letter(code), csi_letter(start_modifier), csi_letter(end_modifier));} \
break; \
} \
}
char start_modifier = 0, end_modifier = 0;
uint32_t *buf = screen->parser_buf, code = screen->parser_buf[screen->parser_buf_pos];
unsigned int num = screen->parser_buf_pos, start, i, num_params=0;
static int params[MAX_PARAMS] = {0}, p1, p2;
bool private;
if (buf[0] == '>' || buf[0] == '<' || buf[0] == '?' || buf[0] == '!' || buf[0] == '=') {
start_modifier = (char)screen->parser_buf[0];
buf++; num--;
}
if (num > 0) {
switch(buf[num-1]) {
CSI_SECONDARY
end_modifier = (char)buf[--num];
break;
}
}
if (code == SGR && !start_modifier && !end_modifier) {
parse_sgr(screen, buf, num, params, dump_callback, "select_graphic_rendition", NULL);
return;
}
if (code == 'r' && !start_modifier && end_modifier == '$') {
// DECCARA
Region r = {0};
unsigned int consumed = parse_region(&r, buf, num);
num -= consumed; buf += consumed;
parse_sgr(screen, buf, num, params, dump_callback, "deccara", &r);
return;
}
for (i=0, start=0; i < num; i++) {
switch(buf[i]) {
IS_DIGIT
break;
case '-':
if (i > start) {
REPORT_ERROR("CSI code can contain hyphens only at the start of numbers");
return;
}
break;
default:
if (i > start) params[num_params++] = utoi(buf + start, i - start);
else if (i == start && buf[i] == ';') params[num_params++] = 0;
if (num_params >= MAX_PARAMS) { i = num; start = num + 1; }
else { start = i + 1; break; }
}
}
if (i > start) params[num_params++] = utoi(buf + start, i - start);
switch(code) {
case ICH:
NO_MODIFIERS(end_modifier, ' ', "Shift left escape code not implemented");
CALL_CSI_HANDLER1(screen_insert_characters, 1);
case REP:
CALL_CSI_HANDLER1(screen_repeat_character, 1);
case CUU:
NO_MODIFIERS(end_modifier, ' ', "Shift right escape code not implemented");
CALL_CSI_HANDLER1(screen_cursor_up2, 1);
case CUD:
case VPR:
CALL_CSI_HANDLER1(screen_cursor_down, 1);
case CUF:
case HPR:
CALL_CSI_HANDLER1(screen_cursor_forward, 1);
case CUB:
CALL_CSI_HANDLER1(screen_cursor_back1, 1);
case CNL:
CALL_CSI_HANDLER1(screen_cursor_down1, 1);
case CPL:
CALL_CSI_HANDLER1(screen_cursor_up1, 1);
case CHA:
case HPA:
CALL_CSI_HANDLER1(screen_cursor_to_column, 1);
case VPA:
CALL_CSI_HANDLER1(screen_cursor_to_line, 1);
case CBT:
CALL_CSI_HANDLER1(screen_backtab, 1);
case CHT:
CALL_CSI_HANDLER1(screen_tabn, 1);
case CUP:
case HVP:
CALL_CSI_HANDLER2(screen_cursor_position, 1, 1);
case ED:
CALL_CSI_HANDLER1P(screen_erase_in_display, 0, '?');
case EL:
CALL_CSI_HANDLER1P(screen_erase_in_line, 0, '?');
case IL:
CALL_CSI_HANDLER1(screen_insert_lines, 1);
case DL:
CALL_CSI_HANDLER1(screen_delete_lines, 1);
case DCH:
if (end_modifier == '#' && !start_modifier) {
CALL_CSI_HANDLER1(screen_push_colors, 0);
} else {
CALL_CSI_HANDLER1(screen_delete_characters, 1);
}
case 'Q':
if (end_modifier == '#' && !start_modifier) { CALL_CSI_HANDLER1(screen_pop_colors, 0); }
REPORT_ERROR("Unknown CSI Q sequence with start and end modifiers: '%c' '%c' and %u parameters", start_modifier, end_modifier, num_params);
break;
case 'R':
if (end_modifier == '#' && !start_modifier) {
REPORT_COMMAND(screen_report_color_stack);
screen_report_color_stack(screen);
break;
}
REPORT_ERROR("Unknown CSI R sequence with start and end modifiers: '%c' '%c' and %u parameters", start_modifier, end_modifier, num_params);
break;
case ECH:
CALL_CSI_HANDLER1(screen_erase_characters, 1);
case DA:
CALL_CSI_HANDLER1S(report_device_attributes, 0);
case TBC:
CALL_CSI_HANDLER1(screen_clear_tab_stop, 0);
case SM:
SET_MODE(screen_set_mode);
case RM:
SET_MODE(screen_reset_mode);
case DSR:
CALL_CSI_HANDLER1P(report_device_status, 0, '?');
case 's':
if (!start_modifier && !end_modifier && !num_params) {
REPORT_COMMAND(screen_save_cursor);
screen_save_cursor(screen);
break;
} else if (start_modifier == '?' && !end_modifier) {
if (!num_params) {
REPORT_COMMAND(screen_save_modes);
screen_save_modes(screen);
} else { SET_MODE(screen_save_mode); }
break;
}
REPORT_ERROR("Unknown CSI s sequence with start and end modifiers: '%c' '%c' and %u parameters", start_modifier, end_modifier, num_params);
break;
case 't':
if (!num_params) {
REPORT_ERROR("Unknown CSI t sequence with start and end modifiers: '%c' '%c' and no parameters", start_modifier, end_modifier);
break;
}
if (start_modifier || end_modifier) {
REPORT_ERROR("Unknown CSI t sequence with start and end modifiers: '%c' '%c', %u parameters and first parameter: %d", start_modifier, end_modifier, num_params, params[0]);
break;
}
switch(params[0]) {
case 4:
case 8:
log_error("Escape codes to resize text area are not supported");
break;
case 14:
case 16:
case 18:
CALL_CSI_HANDLER1(screen_report_size, 0);
break;
case 22:
case 23:
if (num_params == 3 && !params[2]) num_params = 2; // ignore extra 0, generated by weechat or ncurses
CALL_CSI_HANDLER2(screen_manipulate_title_stack, 22, 0);
break;
default:
REPORT_ERROR("Unknown CSI t window manipulation sequence with %u parameters and first parameter: %d", num_params, params[0]);
break;
}
break;
case 'u':
if (!start_modifier && !end_modifier && !num_params) {
REPORT_COMMAND(screen_restore_cursor);
screen_restore_cursor(screen);
break;
}
if (!end_modifier && start_modifier == '?') {
REPORT_COMMAND(screen_report_key_encoding_flags);
screen_report_key_encoding_flags(screen);
break;
}
if (!end_modifier && start_modifier == '=') {
CALL_CSI_HANDLER2(screen_set_key_encoding_flags, 0, 1);
break;
}
if (!end_modifier && start_modifier == '>') {
CALL_CSI_HANDLER1(screen_push_key_encoding_flags, 0);
break;
}
if (!end_modifier && start_modifier == '<') {
CALL_CSI_HANDLER1(screen_pop_key_encoding_flags, 1);
break;
}
REPORT_ERROR("Unknown CSI u sequence with start and end modifiers: '%c' '%c' and %u parameters", start_modifier, end_modifier, num_params);
break;
case 'r':
if (!start_modifier && !end_modifier) {
// DECSTBM
CALL_CSI_HANDLER2(screen_set_margins, 0, 0);
} else if (start_modifier == '?' && !end_modifier) {
if (!num_params) {
REPORT_COMMAND(screen_restore_modes);
screen_restore_modes(screen);
} else { SET_MODE(screen_restore_mode); }
break;
}
REPORT_ERROR("Unknown CSI r sequence with start and end modifiers: '%c' '%c' and %u parameters", start_modifier, end_modifier, num_params);
break;
case 'x':
if (!start_modifier && end_modifier == '*') {
CALL_CSI_HANDLER1(screen_decsace, 0);
}
REPORT_ERROR("Unknown CSI x sequence with start and end modifiers: '%c' '%c'", start_modifier, end_modifier);
break;
case DECSCUSR:
if (!start_modifier && end_modifier == ' ') {
CALL_CSI_HANDLER1M(screen_set_cursor, 1);
}
if (start_modifier == '>' && !end_modifier) {
CALL_CSI_HANDLER1(screen_xtversion, 0);
}
REPORT_ERROR("Unknown CSI q sequence with start and end modifiers: '%c' '%c'", start_modifier, end_modifier);
break;
case SU:
NO_MODIFIERS(end_modifier, ' ', "Select presentation directions escape code not implemented");
CALL_CSI_HANDLER1(screen_scroll, 1);
case SD:
if (!start_modifier && end_modifier == '+') {
CALL_CSI_HANDLER1(screen_reverse_scroll_and_fill_from_scrollback, 1);
} else {
NO_MODIFIERS(start_modifier, 0, "");
CALL_CSI_HANDLER1(screen_reverse_scroll, 1);
}
break;
case DECSTR:
if (end_modifier == '$') {
// DECRQM
CALL_CSI_HANDLER1P(report_mode_status, 0, '?');
} else {
REPORT_ERROR("Unknown DECSTR CSI sequence with start and end modifiers: '%c' '%c'", start_modifier, end_modifier);
}
break;
case 'm':
if (start_modifier == '>' && !end_modifier) {
REPORT_ERROR(
"The application is trying to use XTerm's modifyOtherKeys."
" This is superseded by the kitty keyboard protocol: https://sw.kovidgoyal.net/kitty/keyboard-protocol/"
" the application should be updated to use that"
);
break;
}
/* fallthrough */
default:
REPORT_ERROR("Unknown CSI code: '%s' with start_modifier: '%c' and end_modifier: '%c' and parameters: '%s'", utf8(code), start_modifier, end_modifier, repr_csi_params(params, num_params));
}
}
// }}}
// DCS mode {{{
static bool
startswith(const uint32_t *string, size_t sz, const char *prefix) {
size_t l = strlen(prefix);
if (sz < l) return false;
for (size_t i = 0; i < l; i++) {
if (string[i] != (unsigned char)prefix[i]) return false;
}
return true;
}
#define PENDING_MODE_CHAR '='
static void
dispatch_dcs(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
if (screen->parser_buf_pos < 2) return;
switch(screen->parser_buf[0]) {
case '+':
case '$':
if (screen->parser_buf[1] == 'q') {
PyObject *string = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND, screen->parser_buf + 2, screen->parser_buf_pos - 2);
if (string != NULL) {
REPORT_OSC2(screen_request_capabilities, (char)screen->parser_buf[0], string);
screen_request_capabilities(screen, (char)screen->parser_buf[0], string);
Py_DECREF(string);
} else PyErr_Clear();
} else {
REPORT_ERROR("Unrecognized DCS %c code: 0x%x", (char)screen->parser_buf[0], screen->parser_buf[1]);
}
break;
case PENDING_MODE_CHAR:
if (screen->parser_buf_pos > 2 && (screen->parser_buf[1] == '1' || screen->parser_buf[1] == '2') && screen->parser_buf[2] == 's') {
if (screen->parser_buf[1] == '1') {
screen->pending_mode.activated_at = monotonic();
REPORT_COMMAND(screen_start_pending_mode);
} else {
// ignore stop without matching start, see queue_pending_bytes()
// for how stop is detected while in pending mode.
REPORT_ERROR("Pending mode stop command issued while not in pending mode, this can"
" be either a bug in the terminal application or caused by a timeout with no data"
" received for too long or by too much data in pending mode");
REPORT_COMMAND(screen_stop_pending_mode);
}
} else {
REPORT_ERROR("Unrecognized DCS %c code: 0x%x", (char)screen->parser_buf[0], screen->parser_buf[1]);
}
break;
case '@':
#define CMD_PREFIX "kitty-cmd{"
if (startswith(screen->parser_buf + 1, screen->parser_buf_pos - 2, CMD_PREFIX)) {
PyObject *cmd = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND, screen->parser_buf + 10, screen->parser_buf_pos - 10);
if (cmd != NULL) {
REPORT_OSC2(screen_handle_cmd, (char)screen->parser_buf[0], cmd);
screen_handle_cmd(screen, cmd);
Py_DECREF(cmd);
} else PyErr_Clear();
#undef CMD_PREFIX
#define IF_SIMPLE_PREFIX(prefix, func) \
if (startswith(screen->parser_buf + 1, screen->parser_buf_pos - 1, prefix)) { \
const size_t pp_size = sizeof(prefix); \
PyObject *msg = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND, screen->parser_buf + pp_size, screen->parser_buf_pos - pp_size); \
if (msg != NULL) { \
REPORT_OSC2(func, (char)screen->parser_buf[0], msg); \
func(screen, msg); \
Py_DECREF(msg); \
} else PyErr_Clear();
} else IF_SIMPLE_PREFIX("kitty-print|", screen_handle_print)
} else IF_SIMPLE_PREFIX("kitty-echo|", screen_handle_echo)
} else IF_SIMPLE_PREFIX("kitty-ssh|", screen_handle_ssh)
#undef IF_SIMPLE_PREFIX
} else {
REPORT_ERROR("Unrecognized DCS @ code: 0x%x", screen->parser_buf[1]);
}
break;
default:
REPORT_ERROR("Unrecognized DCS code: 0x%x", screen->parser_buf[0]);
break;
}
}
// }}}
// APC mode {{{
#include "parse-graphics-command.h"
static void
dispatch_apc(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
if (screen->parser_buf_pos < 2) return;
switch(screen->parser_buf[0]) {
case 'G':
parse_graphics_code(screen, dump_callback);
break;
default:
REPORT_ERROR("Unrecognized APC code: 0x%x", screen->parser_buf[0]);
break;
}
}
// }}}
// PM mode {{{
static void
dispatch_pm(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
if (screen->parser_buf_pos < 2) return;
switch(screen->parser_buf[0]) {
default:
REPORT_ERROR("Unrecognized PM code: 0x%x", screen->parser_buf[0]);
break;
}
}
// }}}
// Parse loop {{{
static bool
handle_extended_osc_code(Screen *screen) {
// Handle extra long OSC 52 codes
if (screen->parser_buf[0] != '5' || screen->parser_buf[1] != '2' || screen->parser_buf[2] != ';') return false;
screen->parser_buf[0] = EXTENDED_OSC_SENTINEL; screen->parser_buf[1] = 1;
return true;
}
static bool
accumulate_osc(Screen *screen, uint32_t ch, PyObject DUMP_UNUSED *dump_callback, bool *extended_osc_code) {
switch(ch) {
case ST:
return true;
case BEL:
return true;
case NUL:
case DEL:
break;
case ESC_ST:
if (screen->parser_buf_pos > 0 && screen->parser_buf[screen->parser_buf_pos - 1] == ESC) {
screen->parser_buf_pos--;
return true;
}
/* fallthrough */
default:
if (screen->parser_buf_pos >= PARSER_BUF_SZ - 1) {
if (handle_extended_osc_code(screen)) *extended_osc_code = true;
else REPORT_ERROR("OSC sequence too long, truncating.");
return true;
}
screen->parser_buf[screen->parser_buf_pos++] = ch;
break;
}
return false;
}
static bool
accumulate_dcs(Screen *screen, uint32_t ch, PyObject DUMP_UNUSED *dump_callback) {
switch(ch) {
case ST:
return true;
case NUL:
case DEL:
break;
case ESC:
START_ALLOW_CASE_RANGE
case 32 ... 126:
END_ALLOW_CASE_RANGE
if (screen->parser_buf_pos > 0 && screen->parser_buf[screen->parser_buf_pos-1] == ESC) {
if (ch == '\\') { screen->parser_buf_pos--; return true; }
REPORT_ERROR("DCS sequence contained ESC without trailing \\ at pos: %u ignoring the sequence", screen->parser_buf_pos);
SET_STATE(ESC); return false;
}
if (screen->parser_buf_pos >= PARSER_BUF_SZ - 1) {
REPORT_ERROR("DCS sequence too long, truncating.");
return true;
}
screen->parser_buf[screen->parser_buf_pos++] = ch;
break;
default:
REPORT_ERROR("DCS sequence contained non-printable character: 0x%x ignoring the sequence", ch);
}
return false;
}
static bool
accumulate_oth(Screen *screen, uint32_t ch, PyObject DUMP_UNUSED *dump_callback) {
switch(ch) {
case ST:
return true;
case DEL:
case NUL:
break;
case ESC_ST:
if (screen->parser_buf_pos > 0 && screen->parser_buf[screen->parser_buf_pos - 1] == ESC) {
screen->parser_buf_pos--;
return true;
}
/* fallthrough */
default:
if (screen->parser_buf_pos >= PARSER_BUF_SZ - 1) {
REPORT_ERROR("OTH sequence too long, truncating.");
return true;
}
screen->parser_buf[screen->parser_buf_pos++] = ch;
break;
}
return false;
}
static bool
accumulate_csi(Screen *screen, uint32_t ch, PyObject DUMP_UNUSED *dump_callback) {
#define ENSURE_SPACE \
if (screen->parser_buf_pos > PARSER_BUF_SZ - 1) { \
REPORT_ERROR("CSI sequence too long, ignoring"); \
SET_STATE(0); \
return false; \
}
switch(ch) {
IS_DIGIT
CSI_SECONDARY
case ':':
case ';':
ENSURE_SPACE;
screen->parser_buf[screen->parser_buf_pos++] = ch;
break;
case '?':
case '>':
case '<':
case '=':
if (screen->parser_buf_pos != 0) {
REPORT_ERROR("Invalid character in CSI: 0x%x, ignoring the sequence", ch);
SET_STATE(0);
return false;
}
ENSURE_SPACE;
screen->parser_buf[screen->parser_buf_pos++] = ch;
break;
START_ALLOW_CASE_RANGE
case 'a' ... 'z':
case 'A' ... 'Z':
END_ALLOW_CASE_RANGE
case '@':
case '`':
case '{':
case '|':
case '}':
case '~':
screen->parser_buf[screen->parser_buf_pos] = ch;
return true;
case BEL:
case BS:
case HT:
case LF:
case VT:
case FF:
case NEL:
case CR:
case SO:
case SI:
case IND:
case RI:
case HTS:
dispatch_normal_mode_char(screen, ch, dump_callback);
break;
case NUL:
case DEL:
SET_STATE(0);
break; // no-op
default:
REPORT_ERROR("Invalid character in CSI: 0x%x, ignoring the sequence", ch);
SET_STATE(0);
return false;
}
return false;
#undef ENSURE_SPACE
}
#define dispatch_unicode_char(codepoint, dispatch, watch_for_pending) { \
switch(screen->parser_state) { \
case ESC: \
dispatch##_esc_mode_char(screen, codepoint, dump_callback); \
break; \
case CSI: \
if (accumulate_csi(screen, codepoint, dump_callback)) { dispatch##_csi(screen, dump_callback); SET_STATE(0); watch_for_pending; } \
break; \
case OSC: \
{ \
bool extended_osc_code = false; \
if (accumulate_osc(screen, codepoint, dump_callback, &extended_osc_code)) { \
dispatch##_osc(screen, dump_callback); \
if (extended_osc_code) { \
if (accumulate_osc(screen, codepoint, dump_callback, &extended_osc_code)) { dispatch##_osc(screen, dump_callback); SET_STATE(0); } \
} else { SET_STATE(0); } \
} \
} \
break; \
case APC: \
if (accumulate_oth(screen, codepoint, dump_callback)) { dispatch##_apc(screen, dump_callback); SET_STATE(0); } \
break; \
case PM: \
if (accumulate_oth(screen, codepoint, dump_callback)) { dispatch##_pm(screen, dump_callback); SET_STATE(0); } \
break; \
case DCS: \
if (accumulate_dcs(screen, codepoint, dump_callback)) { dispatch##_dcs(screen, dump_callback); SET_STATE(0); watch_for_pending; } \
if (screen->parser_state == ESC) { dispatch##_esc_mode_char(screen, codepoint, dump_callback); } \
break; \
default: \
dispatch##_normal_mode_char(screen, codepoint, dump_callback); \
break; \
} \
} \
extern uint32_t *latin1_charset;
#define decode_loop(dispatch, watch_for_pending) { \
i = 0; \
uint32_t prev = screen->utf8_state; \
while(i < (size_t)len) { \
uint8_t ch = buf[i++]; \
if (screen->use_latin1) { \
dispatch_unicode_char(latin1_charset[ch], dispatch, watch_for_pending); \
} else { \
switch (decode_utf8(&screen->utf8_state, &screen->utf8_codepoint, ch)) { \
case UTF8_ACCEPT: \
dispatch_unicode_char(screen->utf8_codepoint, dispatch, watch_for_pending); \
break; \
case UTF8_REJECT: \
screen->utf8_state = UTF8_ACCEPT; \
if (prev != UTF8_ACCEPT && i > 0) i--; \
break; \
} \
prev = screen->utf8_state; \
} \
} \
}
static void
_parse_bytes(Screen *screen, const uint8_t *buf, Py_ssize_t len, PyObject DUMP_UNUSED *dump_callback) {
unsigned int i;
decode_loop(dispatch, ;);
FLUSH_DRAW;
}
static size_t
_parse_bytes_watching_for_pending(Screen *screen, const uint8_t *buf, Py_ssize_t len, PyObject DUMP_UNUSED *dump_callback) {
unsigned int i;
decode_loop(dispatch, if (screen->pending_mode.activated_at) goto end);
end:
FLUSH_DRAW;
return i;
}
static void
write_pending_char(Screen *screen, uint32_t ch) {
if (screen->pending_mode.capacity < screen->pending_mode.used + 8) {
if (screen->pending_mode.capacity) {
screen->pending_mode.capacity += screen->pending_mode.capacity >= READ_BUF_SZ ? PENDING_BUF_INCREMENT : screen->pending_mode.capacity;
} else screen->pending_mode.capacity = PENDING_BUF_INCREMENT;
screen->pending_mode.buf = realloc(screen->pending_mode.buf, screen->pending_mode.capacity);
if (!screen->pending_mode.buf) fatal("Out of memory");
}
screen->pending_mode.used += encode_utf8(ch, (char*)screen->pending_mode.buf + screen->pending_mode.used);
}
static void
pending_normal_mode_char(Screen *screen, uint32_t ch, PyObject *dump_callback UNUSED) {
switch(ch) {
case ESC: case CSI: case OSC: case DCS: case APC: case PM:
SET_STATE(ch); break;
default:
write_pending_char(screen, ch); break;
}
}
static void
pending_esc_mode_char(Screen *screen, uint32_t ch, PyObject *dump_callback UNUSED) {
if (screen->parser_buf_pos > 0) {
write_pending_char(screen, ESC);
write_pending_char(screen, screen->parser_buf[screen->parser_buf_pos - 1]);
write_pending_char(screen, ch);
SET_STATE(0);
return;
}
switch (ch) {
case ESC_DCS:
SET_STATE(DCS); break;
case ESC_OSC:
SET_STATE(OSC); break;
case ESC_CSI:
SET_STATE(CSI); break;
case ESC_APC:
SET_STATE(APC); break;
case ESC_PM:
SET_STATE(PM); break;
case '%':
case '(':
case ')':
case '*':
case '+':
case '-':
case '.':
case '/':
case ' ':
case '#':
screen->parser_buf[screen->parser_buf_pos++] = ch;
break;
default:
write_pending_char(screen, ESC); write_pending_char(screen, ch);
SET_STATE(0); break;
}
}
#define pb(i) screen->parser_buf[i]
static void
pending_escape_code(Screen *screen, char_type start_ch, char_type end_ch) {
write_pending_char(screen, start_ch);
for (unsigned i = 0; i < screen->parser_buf_pos; i++) write_pending_char(screen, pb(i));
write_pending_char(screen, end_ch);
}
static void pending_pm(Screen *screen, PyObject *dump_callback UNUSED) { pending_escape_code(screen, PM, ST); }
static void pending_apc(Screen *screen, PyObject *dump_callback UNUSED) { pending_escape_code(screen, APC, ST); }
static void
pending_osc(Screen *screen, PyObject *dump_callback UNUSED) {
const bool extended = is_extended_osc(screen);
pending_escape_code(screen, OSC, ST);
if (extended) continue_osc_52(screen);
}
static void
pending_dcs(Screen *screen, PyObject *dump_callback DUMP_UNUSED) {
if (screen->parser_buf_pos >= 3 && pb(0) == '=' && (pb(1) == '1' || pb(1) == '2') && pb(2) == 's') {
screen->pending_mode.activated_at = pb(1) == '1' ? monotonic() : 0;
if (pb(1) == '1') {
REPORT_COMMAND(screen_start_pending_mode);
screen->pending_mode.activated_at = monotonic();
} else {
screen->pending_mode.stop_escape_code_type = DCS;
screen->pending_mode.activated_at = 0;
}
} else pending_escape_code(screen, DCS, ST);
}
static void
pending_csi(Screen *screen, PyObject *dump_callback DUMP_UNUSED) {
if (screen->parser_buf_pos == 5 && pb(0) == '?' && pb(1) == '2' && pb(2) == '0' && pb(3) == '2' && pb(4) == '6' && (pb(5) == 'h' || pb(5) == 'l')) {
if (pb(5) == 'h') {
REPORT_COMMAND(screen_set_mode, 2026, 1);
screen->pending_mode.activated_at = monotonic();
} else {
screen->pending_mode.activated_at = 0;
screen->pending_mode.stop_escape_code_type = CSI;
}
} else pending_escape_code(screen, CSI, pb(screen->parser_buf_pos));
}
#undef pb
static size_t
queue_pending_bytes(Screen *screen, const uint8_t *buf, size_t len, PyObject *dump_callback DUMP_UNUSED) {
unsigned int i;
decode_loop(pending, if (!screen->pending_mode.activated_at) goto end);
end:
return i;
}
static void
dump_partial_escape_code_to_pending(Screen *screen) {
if (screen->parser_buf_pos) {
write_pending_char(screen, screen->parser_state);
for (unsigned i = 0; i < screen->parser_buf_pos; i++) write_pending_char(screen, screen->parser_buf[i]);
}
}
static void
do_parse_bytes(Screen *screen, const uint8_t *read_buf, const size_t read_buf_sz, monotonic_t now, PyObject *dump_callback DUMP_UNUSED) {
enum STATE {START, PARSE_PENDING, PARSE_READ_BUF, QUEUE_PENDING};
enum STATE state = START;
size_t read_buf_pos = 0;
unsigned int parser_state_at_start_of_pending = 0;
do {
switch(state) {
case START:
if (screen->pending_mode.activated_at) {
if (screen->pending_mode.activated_at + screen->pending_mode.wait_time < now) {
dump_partial_escape_code_to_pending(screen);
screen->pending_mode.activated_at = 0;
state = START;
} else state = QUEUE_PENDING;
} else {
state = screen->pending_mode.used ? PARSE_PENDING : PARSE_READ_BUF;
}
break;
case PARSE_PENDING:
screen->parser_state = parser_state_at_start_of_pending;
parser_state_at_start_of_pending = 0;
_parse_bytes(screen, screen->pending_mode.buf, screen->pending_mode.used, dump_callback);
screen->pending_mode.used = 0;
screen->pending_mode.activated_at = 0; // ignore any pending starts in the pending bytes
if (screen->pending_mode.capacity > READ_BUF_SZ + PENDING_BUF_INCREMENT) {
screen->pending_mode.capacity = READ_BUF_SZ;
screen->pending_mode.buf = realloc(screen->pending_mode.buf, screen->pending_mode.capacity);
if (!screen->pending_mode.buf) fatal("Out of memory");
}
if (screen->pending_mode.stop_escape_code_type) {
if (screen->pending_mode.stop_escape_code_type == DCS) { REPORT_COMMAND(screen_stop_pending_mode); }
else if (screen->pending_mode.stop_escape_code_type == CSI) { REPORT_COMMAND(screen_reset_mode, 2026, 1); }
screen->pending_mode.stop_escape_code_type = 0;
}
state = START;
break;
case PARSE_READ_BUF:
screen->pending_mode.activated_at = 0;
read_buf_pos += _parse_bytes_watching_for_pending(screen, read_buf + read_buf_pos, read_buf_sz - read_buf_pos, dump_callback);
state = START;
break;
case QUEUE_PENDING: {
screen->pending_mode.stop_escape_code_type = 0;
if (screen->pending_mode.used >= READ_BUF_SZ) {
dump_partial_escape_code_to_pending(screen);
screen->pending_mode.activated_at = 0;
state = START;
break;
}
if (!screen->pending_mode.used) parser_state_at_start_of_pending = screen->parser_state;
read_buf_pos += queue_pending_bytes(screen, read_buf + read_buf_pos, read_buf_sz - read_buf_pos, dump_callback);
state = START;
} break;
}
} while(read_buf_pos < read_buf_sz || (!screen->pending_mode.activated_at && screen->pending_mode.used));
}
// }}}
// Entry points {{{
#ifdef DUMP_COMMANDS
#define FNAME(x) x##_dump
#else
#define FNAME(x) x
#endif
PyObject*
FNAME(parse_bytes)(PyObject UNUSED *self, PyObject *args) {
PyObject *dump_callback = NULL;
Py_buffer pybuf;
Screen *screen;
#ifdef DUMP_COMMANDS
if (!PyArg_ParseTuple(args, "OO!y*", &dump_callback, &Screen_Type, &screen, &pybuf)) return NULL;
#else
if (!PyArg_ParseTuple(args, "O!y*", &Screen_Type, &screen, &pybuf)) return NULL;
#endif
do_parse_bytes(screen, pybuf.buf, pybuf.len, monotonic(), dump_callback);
Py_RETURN_NONE;
}
void
FNAME(parse_worker)(Screen *screen, PyObject *dump_callback, monotonic_t now) {
#ifdef DUMP_COMMANDS
if (screen->read_buf_sz) {
Py_XDECREF(PyObject_CallFunction(dump_callback, "sy#", "bytes", screen->read_buf, screen->read_buf_sz)); PyErr_Clear();
}
#endif
do_parse_bytes(screen, screen->read_buf, screen->read_buf_sz, now, dump_callback);
screen->read_buf_sz = 0;
}
#undef FNAME
// }}}
Reference in New Issue View Git Blame Copy Permalink