1 #include <newt.h> 2 #include <signal.h> 3 #include <stdbool.h> 4 5 #include "../../util/cache.h" 6 #include "../../util/debug.h" 7 #include "../browser.h" 8 #include "../helpline.h" 9 #include "../ui.h" 10 #include "../util.h" 11 #include "../libslang.h" 12 #include "../keysyms.h" 13 14 pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER; 15 16 static volatile int ui__need_resize; 17 18 void ui__refresh_dimensions(bool force) 19 { 20 if (force || ui__need_resize) { 21 ui__need_resize = 0; 22 pthread_mutex_lock(&ui__lock); 23 SLtt_get_screen_size(); 24 SLsmg_reinit_smg(); 25 pthread_mutex_unlock(&ui__lock); 26 } 27 } 28 29 static void ui__sigwinch(int sig __used) 30 { 31 ui__need_resize = 1; 32 } 33 34 static void ui__setup_sigwinch(void) 35 { 36 static bool done; 37 38 if (done) 39 return; 40 41 done = true; 42 pthread__unblock_sigwinch(); 43 signal(SIGWINCH, ui__sigwinch); 44 } 45 46 int ui__getch(int delay_secs) 47 { 48 struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL; 49 fd_set read_set; 50 int err, key; 51 52 ui__setup_sigwinch(); 53 54 FD_ZERO(&read_set); 55 FD_SET(0, &read_set); 56 57 if (delay_secs) { 58 timeout.tv_sec = delay_secs; 59 timeout.tv_usec = 0; 60 } 61 62 err = select(1, &read_set, NULL, NULL, ptimeout); 63 64 if (err == 0) 65 return K_TIMER; 66 67 if (err == -1) { 68 if (errno == EINTR) 69 return K_RESIZE; 70 return K_ERROR; 71 } 72 73 key = SLang_getkey(); 74 if (key != K_ESC) 75 return key; 76 77 FD_ZERO(&read_set); 78 FD_SET(0, &read_set); 79 timeout.tv_sec = 0; 80 timeout.tv_usec = 20; 81 err = select(1, &read_set, NULL, NULL, &timeout); 82 if (err == 0) 83 return K_ESC; 84 85 SLang_ungetkey(key); 86 return SLkp_getkey(); 87 } 88 89 static void newt_suspend(void *d __used) 90 { 91 newtSuspend(); 92 raise(SIGTSTP); 93 newtResume(); 94 } 95 96 static void ui__signal(int sig) 97 { 98 ui__exit(false); 99 psignal(sig, "perf"); 100 exit(0); 101 } 102 103 int ui__init(void) 104 { 105 int err; 106 107 newtInit(); 108 err = SLkp_init(); 109 if (err < 0) { 110 pr_err("TUI initialization failed.\n"); 111 goto out; 112 } 113 114 SLkp_define_keysym((char *)"^(kB)", SL_KEY_UNTAB); 115 116 newtSetSuspendCallback(newt_suspend, NULL); 117 ui_helpline__init(); 118 ui_browser__init(); 119 120 signal(SIGSEGV, ui__signal); 121 signal(SIGFPE, ui__signal); 122 signal(SIGINT, ui__signal); 123 signal(SIGQUIT, ui__signal); 124 signal(SIGTERM, ui__signal); 125 out: 126 return err; 127 } 128 129 void ui__exit(bool wait_for_ok) 130 { 131 if (wait_for_ok) 132 ui__question_window("Fatal Error", 133 ui_helpline__last_msg, 134 "Press any key...", 0); 135 136 SLtt_set_cursor_visibility(1); 137 SLsmg_refresh(); 138 SLsmg_reset_smg(); 139 SLang_reset_tty(); 140 } 141