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/* Copyright (C) 2018 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "chat.h"
static bool xterm;
void termInit(void) {
char *term = getenv("TERM");
xterm = term && !strncmp(term, "xterm", 5);
}
void termNoFlow(void) {
struct termios attr;
int error = tcgetattr(STDIN_FILENO, &attr);
if (error) return;
attr.c_iflag &= ~IXON;
attr.c_cc[VDISCARD] = _POSIX_VDISABLE;
tcsetattr(STDIN_FILENO, TCSANOW, &attr);
}
void termTitle(const char *title) {
if (!xterm) return;
printf("\33]0;%s\33\\", title);
fflush(stdout);
}
static void privateMode(const char *mode, bool set) {
printf("\33[?%s%c", mode, (set ? 'h' : 'l'));
fflush(stdout);
}
void termMode(enum TermMode mode, bool set) {
switch (mode) {
break; case TermFocus: privateMode("1004", set);
break; case TermPaste: privateMode("2004", set);
}
}
#define T(s, i) ((s) << 8 | (i))
enum { Esc = '\33' };
enum TermEvent termEvent(char ch) {
static uint state = 0;
switch (T(state, ch)) {
case T(0, Esc): state = 1; return 0;
case T(1, '['): state = 2; return 0;
case T(2, 'I'): state = 0; return TermFocusIn;
case T(2, 'O'): state = 0; return TermFocusOut;
case T(2, '2'): state = 3; return 0;
case T(3, '0'): state = 4; return 0;
case T(4, '0'): state = 5; return 0;
case T(5, '~'): state = 0; return TermPasteStart;
case T(4, '1'): state = 6; return 0;
case T(6, '~'): state = 0; return TermPasteEnd;
default: state = 0; return 0;
}
}
#ifdef TEST
#include <assert.h>
static bool testEvent(const char *str, enum TermEvent event) {
enum TermEvent e = TermNone;
for (size_t i = 0; i < strlen(str); ++i) {
if (e) return false;
e = termEvent(str[i]);
}
return (e == event);
}
int main() {
assert(testEvent("\33[I", TermFocusIn));
assert(testEvent("\33[O", TermFocusOut));
assert(testEvent("\33[200~", TermPasteStart));
assert(testEvent("\33[201~", TermPasteEnd));
}
#endif
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