1 // SPDX-License-Identifier: GPL-2.0 2 #include <stdio.h> 3 #include <stdlib.h> 4 #include <string.h> 5 #include <linux/kernel.h> 6 #include <linux/string.h> 7 8 #include "../helpline.h" 9 #include "../ui.h" 10 #include "../libslang.h" 11 12 char ui_helpline__last_msg[1024]; 13 bool tui_helpline__set; 14 15 static void tui_helpline__pop(void) 16 { 17 } 18 19 static void tui_helpline__push(const char *msg) 20 { 21 const size_t sz = sizeof(ui_helpline__current); 22 23 SLsmg_gotorc(SLtt_Screen_Rows - 1, 0); 24 SLsmg_set_color(0); 25 SLsmg_write_nstring((char *)msg, SLtt_Screen_Cols); 26 SLsmg_refresh(); 27 strlcpy(ui_helpline__current, msg, sz); 28 } 29 30 static int tui_helpline__show(const char *format, va_list ap) 31 { 32 int ret; 33 static int backlog; 34 35 mutex_lock(&ui__lock); 36 ret = vscnprintf(ui_helpline__last_msg + backlog, 37 sizeof(ui_helpline__last_msg) - backlog, format, ap); 38 backlog += ret; 39 40 tui_helpline__set = true; 41 42 if (ui_helpline__last_msg[backlog - 1] == '\n') { 43 ui_helpline__puts(ui_helpline__last_msg); 44 SLsmg_refresh(); 45 backlog = 0; 46 } 47 mutex_unlock(&ui__lock); 48 49 return ret; 50 } 51 52 struct ui_helpline tui_helpline_fns = { 53 .pop = tui_helpline__pop, 54 .push = tui_helpline__push, 55 .show = tui_helpline__show, 56 }; 57 58 void ui_helpline__init(void) 59 { 60 helpline_fns = &tui_helpline_fns; 61 ui_helpline__puts(" "); 62 } 63