1 // SPDX-License-Identifier: GPL-2.0
2 #include <stdio.h>
3 #include <stdlib.h>
4 #include <string.h>
5 #include <pthread.h>
6 #include <linux/kernel.h>
7 #include <linux/string.h>
8 
9 #include "../helpline.h"
10 #include "../ui.h"
11 #include "../libslang.h"
12 
13 char ui_helpline__last_msg[1024];
14 bool tui_helpline__set;
15 
tui_helpline__pop(void)16 static void tui_helpline__pop(void)
17 {
18 }
19 
tui_helpline__push(const char * msg)20 static void tui_helpline__push(const char *msg)
21 {
22 	const size_t sz = sizeof(ui_helpline__current);
23 
24 	SLsmg_gotorc(SLtt_Screen_Rows - 1, 0);
25 	SLsmg_set_color(0);
26 	SLsmg_write_nstring((char *)msg, SLtt_Screen_Cols);
27 	SLsmg_refresh();
28 	strlcpy(ui_helpline__current, msg, sz);
29 }
30 
tui_helpline__show(const char * format,va_list ap)31 static int tui_helpline__show(const char *format, va_list ap)
32 {
33 	int ret;
34 	static int backlog;
35 
36 	pthread_mutex_lock(&ui__lock);
37 	ret = vscnprintf(ui_helpline__last_msg + backlog,
38 			sizeof(ui_helpline__last_msg) - backlog, format, ap);
39 	backlog += ret;
40 
41 	tui_helpline__set = true;
42 
43 	if (ui_helpline__last_msg[backlog - 1] == '\n') {
44 		ui_helpline__puts(ui_helpline__last_msg);
45 		SLsmg_refresh();
46 		backlog = 0;
47 	}
48 	pthread_mutex_unlock(&ui__lock);
49 
50 	return ret;
51 }
52 
53 struct ui_helpline tui_helpline_fns = {
54 	.pop	= tui_helpline__pop,
55 	.push	= tui_helpline__push,
56 	.show	= tui_helpline__show,
57 };
58 
ui_helpline__init(void)59 void ui_helpline__init(void)
60 {
61 	helpline_fns = &tui_helpline_fns;
62 	ui_helpline__puts(" ");
63 }
64