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