mirror of https://gitee.com/openkylin/linux.git
141 lines
2.4 KiB
C
141 lines
2.4 KiB
C
#include <newt.h>
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#include <signal.h>
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#include <stdbool.h>
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#include "../../util/cache.h"
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#include "../../util/debug.h"
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#include "../browser.h"
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#include "../helpline.h"
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#include "../ui.h"
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#include "../util.h"
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#include "../libslang.h"
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#include "../keysyms.h"
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pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER;
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static volatile int ui__need_resize;
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void ui__refresh_dimensions(bool force)
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{
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if (force || ui__need_resize) {
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ui__need_resize = 0;
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pthread_mutex_lock(&ui__lock);
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SLtt_get_screen_size();
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SLsmg_reinit_smg();
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pthread_mutex_unlock(&ui__lock);
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}
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}
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static void ui__sigwinch(int sig __used)
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{
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ui__need_resize = 1;
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}
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static void ui__setup_sigwinch(void)
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{
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static bool done;
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if (done)
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return;
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done = true;
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pthread__unblock_sigwinch();
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signal(SIGWINCH, ui__sigwinch);
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}
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int ui__getch(int delay_secs)
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{
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struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
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fd_set read_set;
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int err, key;
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ui__setup_sigwinch();
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FD_ZERO(&read_set);
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FD_SET(0, &read_set);
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if (delay_secs) {
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timeout.tv_sec = delay_secs;
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timeout.tv_usec = 0;
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}
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err = select(1, &read_set, NULL, NULL, ptimeout);
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if (err == 0)
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return K_TIMER;
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if (err == -1) {
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if (errno == EINTR)
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return K_RESIZE;
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return K_ERROR;
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}
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key = SLang_getkey();
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if (key != K_ESC)
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return key;
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FD_ZERO(&read_set);
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FD_SET(0, &read_set);
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timeout.tv_sec = 0;
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timeout.tv_usec = 20;
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err = select(1, &read_set, NULL, NULL, &timeout);
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if (err == 0)
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return K_ESC;
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SLang_ungetkey(key);
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return SLkp_getkey();
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}
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static void newt_suspend(void *d __used)
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{
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newtSuspend();
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raise(SIGTSTP);
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newtResume();
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}
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static void ui__signal(int sig)
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{
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ui__exit(false);
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psignal(sig, "perf");
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exit(0);
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}
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int ui__init(void)
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{
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int err;
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newtInit();
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err = SLkp_init();
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if (err < 0) {
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pr_err("TUI initialization failed.\n");
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goto out;
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}
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SLkp_define_keysym((char *)"^(kB)", SL_KEY_UNTAB);
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newtSetSuspendCallback(newt_suspend, NULL);
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ui_helpline__init();
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ui_browser__init();
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signal(SIGSEGV, ui__signal);
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signal(SIGFPE, ui__signal);
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signal(SIGINT, ui__signal);
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signal(SIGQUIT, ui__signal);
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signal(SIGTERM, ui__signal);
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out:
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return err;
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}
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void ui__exit(bool wait_for_ok)
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{
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if (wait_for_ok)
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ui__question_window("Fatal Error",
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ui_helpline__last_msg,
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"Press any key...", 0);
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SLtt_set_cursor_visibility(1);
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SLsmg_refresh();
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SLsmg_reset_smg();
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SLang_reset_tty();
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}
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