/* qwaq-input.c Input handling Copyright (C) 2020 Bill Currie Author: Bill Currie Date: 2020/03/21 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include #include #include #include "QF/dstring.h" #include "QF/hash.h" #include "QF/keys.h" #include "QF/sys.h" #include "qwaq.h" #include "event.h" #include "qwaq-curses.h" #define always_inline inline __attribute__((__always_inline__)) #define MOUSE_MOVES_ON "\033[?1003h" #define MOUSE_MOVES_OFF "\033[?1003l" #define SGR_ON "\033[?1006h" #define SGR_OFF "\033[?1006l" #define WHEEL_BUTTONS 0x78 // scroll up/down/left/right - always click typedef struct qwaq_key_s { const char *sequence; knum_t key; unsigned shift; } qwaq_key_t; static qwaq_key_t default_keys[] = { { "\033OP", QFK_F1 }, { "\033OQ", QFK_F2 }, { "\033OR", QFK_F3 }, { "\033OS", QFK_F4 }, { "\033[15~", QFK_F5 }, { "\033[17~", QFK_F6 }, { "\033[18~", QFK_F7 }, { "\033[19~", QFK_F8 }, { "\033[20~", QFK_F9 }, { "\033[21~", QFK_F10 }, { "\033[23~", QFK_F11 }, { "\033[24~", QFK_F12 }, // shift F1-F12 { "\033[1;2P", QFK_F13 }, { "\033[1;2Q", QFK_F14 }, { "\033[1;2R", QFK_F15 }, { "\033[1;2S", QFK_F16 }, { "\033[15;2~", QFK_F17 }, { "\033[17;2~", QFK_F18 }, { "\033[18;2~", QFK_F19 }, { "\033[19;2~", QFK_F20 }, { "\033[20;2~", QFK_F21 }, { "\033[21;2~", QFK_F22 }, { "\033[23;2~", QFK_F23 }, { "\033[24;2~", QFK_F24 }, // control F1-F12 { "\033[1;5P", QFK_F25 }, { "\033[1;5Q", QFK_F26 }, { "\033[1;5R", QFK_F27 }, { "\033[1;5S", QFK_F28 }, { "\033[15;5~", QFK_F29 }, { "\033[17;5~", QFK_F30 }, { "\033[18;5~", QFK_F31 }, { "\033[19;5~", QFK_F32 }, { "\033[20;5~", QFK_F33 }, { "\033[21;5~", QFK_F34 }, { "\033[23;5~", QFK_F35 }, { "\033[24;5~", QFK_F36 }, // shift control F1-F12 { "\033[1;6P", QFK_F37 }, { "\033[1;6Q", QFK_F38 }, { "\033[1;6R", QFK_F39 }, { "\033[1;6S", QFK_F40 }, { "\033[15;6~", QFK_F41 }, { "\033[17;6~", QFK_F42 }, { "\033[18;6~", QFK_F43 }, { "\033[19;6~", QFK_F44 }, { "\033[20;6~", QFK_F45 }, { "\033[21;6~", QFK_F46 }, { "\033[23;6~", QFK_F47 }, { "\033[24;6~", QFK_F48 }, { "\033[2~", QFK_INSERT, 0 }, { "\033[3~", QFK_DELETE, 0 }, { "\033[H", QFK_HOME, 0 }, { "\033[F", QFK_END, 0 }, { "\033[5~", QFK_PAGEUP, 0 }, { "\033[6~", QFK_PAGEDOWN, 0 }, { "\033[A", QFK_UP, 0 }, { "\033[B", QFK_DOWN, 0 }, { "\033[C", QFK_RIGHT, 0 }, { "\033[D", QFK_LEFT, 0 }, // shift // there may be a setting to tell xterm to NOT act on shift ins/pgup/pgdn { "\033[2;2~", QFK_INSERT, 1 }, // xterm gobbles (and pastes) { "\033[3;2~", QFK_DELETE, 1 }, { "\033[1;2H", QFK_HOME, 1 }, { "\033[1;2F", QFK_END, 1 }, { "\033[5;2~", QFK_PAGEUP, 1 }, // xterm gobbles (scrolls term) { "\033[6;2~", QFK_PAGEDOWN, 1 }, // xterm gobbles (scrolls term) { "\033[1;2A", QFK_UP, 1 }, { "\033[1;2B", QFK_DOWN, 1 }, { "\033[1;2C", QFK_RIGHT, 1 }, { "\033[1;2D", QFK_LEFT, 1 }, { "\033[Z", QFK_TAB, 1 }, // control { "\033[2;5~", QFK_INSERT, 4 }, { "\033[3;5~", QFK_DELETE, 4 }, { "\033[1;5H", QFK_HOME, 4 }, { "\033[1;5F", QFK_END, 4 }, { "\033[5;5~", QFK_PAGEUP, 4 }, { "\033[6;5~", QFK_PAGEDOWN, 4 }, { "\033[1;5A", QFK_UP, 4 }, { "\033[1;5B", QFK_DOWN, 4 }, { "\033[1;5C", QFK_RIGHT, 4 }, { "\033[1;5D", QFK_LEFT, 4 }, // shift control { "\033[2;6~", QFK_INSERT, 5 }, { "\033[3;6~", QFK_DELETE, 5 }, { "\033[1;6H", QFK_HOME, 5 }, { "\033[1;6F", QFK_END, 5 }, { "\033[5;6~", QFK_PAGEUP, 5 }, { "\033[6;6~", QFK_PAGEDOWN, 5 }, { "\033[1;6A", QFK_UP, 5 }, { "\033[1;6B", QFK_DOWN, 5 }, { "\033[1;6C", QFK_RIGHT, 5 }, { "\033[1;6D", QFK_LEFT, 5 }, }; static struct sigaction save_winch; static sigset_t winch_mask; static volatile sig_atomic_t winch_arrived; static void handle_winch (int sig) { winch_arrived = 1; } int qwaq_add_event (qwaq_resources_t *res, qwaq_event_t *event) { struct timespec timeout; int merged = 0; int ret = 0; // merge motion events pthread_mutex_lock (&res->event_cond.mut); unsigned last = RB_DATA_AVAILABLE (res->event_queue); if (event->what == qe_mousemove && last > 1 && RB_PEEK_DATA(res->event_queue, last - 1).what == qe_mousemove) { RB_POKE_DATA(res->event_queue, last - 1, *event); merged = 1; pthread_cond_broadcast (&res->event_cond.rcond); } pthread_mutex_unlock (&res->event_cond.mut); if (merged) { return 0; } pthread_mutex_lock (&res->event_cond.mut); qwaq_init_timeout (&timeout, 5000 * 1000000L); while (RB_SPACE_AVAILABLE (res->event_queue) < 1 && ret == 0) { ret = pthread_cond_timedwait (&res->event_cond.wcond, &res->event_cond.mut, &timeout); } RB_WRITE_DATA (res->event_queue, event, 1); pthread_cond_broadcast (&res->event_cond.rcond); pthread_mutex_unlock (&res->event_cond.mut); return ret; } static void resize_event (qwaq_resources_t *res) { qwaq_event_t event = {}; struct winsize size; if (ioctl (fileno (stdout), TIOCGWINSZ, &size) != 0) { return; } event.what = qe_resize; event.resize.width = size.ws_col; event.resize.height = size.ws_row; qwaq_add_event (res, &event); } static void key_event (qwaq_resources_t *res, int key, unsigned shift) { qwaq_event_t event = {}; event.what = qe_keydown; event.when = Sys_DoubleTime (); event.key.code = key; event.key.shift = shift; qwaq_add_event (res, &event); } static void mouse_event (qwaq_resources_t *res, int what, int x, int y) { qwaq_event_t event = {}; event.what = what; event.when = Sys_DoubleTime (); event.mouse.x = x; event.mouse.y = y; event.mouse.buttons = res->button_state; if (event.what == qe_mousedown) { if (event.when - res->lastClick.when <= 0.4 && res->lastClick.mouse.buttons == event.mouse.buttons && res->lastClick.mouse.click < 3) { event.mouse.click = res->lastClick.mouse.click + 1; event.what = qe_mouseclick; } res->lastClick = event; } else if (event.what == qe_mouseclick) { // scroll button event, so always single click event.mouse.click = 1; } qwaq_add_event (res, &event); } static void parse_mouse (qwaq_resources_t *res, unsigned ctrl, int x, int y, int cmd) { int button = ctrl & 3; int ext = (ctrl >> 6); int what = qe_none; if (ctrl & 0x20) { // motion-only event button = -1; what = qe_mousemove; } else { // xterm doesn't send release events for buttons 4-7 res->button_state &= ~(0x78); if (!ext && button == 3 && !cmd) { res->button_state = 0; // unknown which button was released button = -1; what = qe_mouseup; } else { if (ext) { button += 4 * ext - 1; } if (cmd == 'm') { res->button_state &= ~(1 << button); what = qe_mouseup; } else { res->button_state |= 1 << button; if (res->button_state & WHEEL_BUTTONS) { what = qe_mouseclick; } else { what = qe_mousedown; } } } } res->mouse_x = x; res->mouse_y = y; mouse_event (res, what, x, y); } static void parse_x10 (qwaq_resources_t *res) { int x = (byte) res->escbuff.str[1] - '!'; // want 0-based int y = (byte) res->escbuff.str[2] - '!'; // want 0-based unsigned ctrl = (byte) res->escbuff.str[0] - ' '; parse_mouse (res, ctrl, x, y, 0); } static void parse_sgr (qwaq_resources_t *res, char cmd) { unsigned ctrl, x, y; sscanf (res->escbuff.str, "%u;%u;%u", &ctrl, &x, &y); // mouse coords are 1-based, but want 0-based parse_mouse (res, ctrl, x - 1, y - 1, cmd); } static void parse_key (qwaq_resources_t *res) { qwaq_key_t *key = Hash_Find (res->key_sequences, res->escbuff.str); //Sys_Printf ("parse_key: %s\n", res->escbuff.str + 1); if (key) { //Sys_Printf (" %d %03x %s\n", key->key, key->shift, // Key_KeynumToString (key->key)); key_event (res, key->key, key->shift); } } static void process_char (qwaq_resources_t *res, char ch) { if (ch == 0x1b) { // always reset if escape is seen, may be a desync res->escstate = esc_escape; } else { switch (res->escstate) { case esc_ground: key_event (res, (byte) ch, 0); // shift state unknown break; case esc_escape: if (ch == '[') { res->escstate = esc_csi; } else if (ch == 'O') { // will wind up accepting P;P... but meh res->escstate = esc_key; dstring_clear (&res->escbuff); // start the buffer with what got us hear: eases key lookup dstring_append (&res->escbuff, "\033O", 2); } else { res->escstate = esc_ground; } break; case esc_csi: if (ch == 'M') { res->escstate = esc_mouse; dstring_clear (&res->escbuff); } else if (ch == '<') { res->escstate = esc_sgr; dstring_clear (&res->escbuff); } else if (ch >= '0' && ch < 127) { res->escstate = esc_key; dstring_clear (&res->escbuff); // start the buffer with what got us hear: eases key lookup dstring_append (&res->escbuff, "\033[", 2); // the csi code might be short (eg, \e[H for home) so // need to check for end of string right away goto esc_key_jump; } else { res->escstate = esc_ground; } break; case esc_mouse: dstring_append (&res->escbuff, &ch, 1); if (res->escbuff.size == 3) { parse_x10 (res); res->escstate = esc_ground; } break; case esc_sgr: if (isdigit (ch) || ch == ';') { dstring_append (&res->escbuff, &ch, 1); } else { if (ch == 'm' || ch == 'M') { // terminate the string dstring_append (&res->escbuff, "", 1); parse_sgr (res, ch); } res->escstate = esc_ground; } break; case esc_key: esc_key_jump: dstring_append (&res->escbuff, &ch, 1); if (!isdigit (ch) && ch != ';') { // terminate the string dstring_append (&res->escbuff, "", 1); // parse_key will sort out whether it was a valid sequence parse_key (res); res->escstate = esc_ground; } break; } //printf("res->escstate %d\n", res->escstate); } } static const char * key_sequence_getkey (const void *_seq, void *unused) { __auto_type seq = (const qwaq_key_t *) _seq; return seq->sequence; } void qwaq_input_init (qwaq_resources_t *res) { if (res->key_sequences) { Hash_FlushTable (res->key_sequences); } else { res->key_sequences = Hash_NewTable (127, key_sequence_getkey, 0, 0, res->pr->hashlink_freelist); } for (size_t i = 0; i < sizeof (default_keys) / sizeof (default_keys[0]); i++) { Hash_Add (res->key_sequences, &default_keys[i]); } sigemptyset (&winch_mask); sigaddset (&winch_mask, SIGWINCH); struct sigaction action = {}; action.sa_handler = handle_winch; sigaction (SIGWINCH, &action, &save_winch); // ncurses takes care of input mode for us, so need only tell xterm // what we need write(1, MOUSE_MOVES_ON, sizeof (MOUSE_MOVES_ON) - 1); write(1, SGR_ON, sizeof (SGR_ON) - 1); } void qwaq_input_shutdown (qwaq_resources_t *res) { // ncurses takes care of input mode for us, so need only tell xterm // what we need write(1, SGR_OFF, sizeof (SGR_OFF) - 1); write(1, MOUSE_MOVES_OFF, sizeof (MOUSE_MOVES_OFF) - 1); sigaction (SIGWINCH, &save_winch, 0); } void qwaq_process_input (qwaq_resources_t *res) { char buf[256]; int len; sigset_t save_set; int saw_winch; pthread_sigmask (SIG_BLOCK, &winch_mask, &save_set); saw_winch = winch_arrived; winch_arrived = 0; pthread_sigmask (SIG_SETMASK, &save_set, 0); if (saw_winch) { resize_event (res); } while (Sys_CheckInput (1, -1)) { len = read(0, buf, sizeof (buf)); for (int i = 0; i < len; i++) { process_char (res, buf[i]); } } }