1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
#[link(name = "term", vers = "0.0.1", author = "doy")];
#[crate_type = "lib"];
use core::libc::c_int;
use core::option::{Option,Some,None};
use core::io::ReaderUtil;
pub use ios::{cooked,cbreak,raw,echo,size};
use info::{init,escape,escape2};
use util::Trie;
struct Writer {
priv cleanup: bool,
}
pub fn Writer (cleanup: bool) -> Writer {
init();
Writer { cleanup: cleanup }
}
impl Writer {
pub fn clear (&self) {
io::print(escape("clear"));
}
pub fn move (&self, col: uint, row: uint) {
if col == 0u && row == 0u {
io::print(escape("home"));
}
else {
io::print(escape2("cup", row as int, col as int));
}
}
pub fn cursor (&self, enabled: bool) {
if enabled {
io::print(escape("civis"));
}
else {
io::print(escape("cnorm"));
}
}
pub fn alternate_screen (&self, enable: bool) {
if enable {
io::print(escape("smcup"));
}
else {
io::print(escape("rmcup"));
}
}
}
impl Drop for Writer {
fn finalize (&self) {
if self.cleanup {
io::print(escape("rmcup"));
io::print(escape("sgr0"));
io::print(escape("cnorm"));
}
}
}
enum Keypress {
KeyCharacter(char),
KeyBackspace,
KeyReturn,
KeyTab,
KeyCtrl(char),
KeyF(int),
KeyUp,
KeyDown,
KeyLeft,
KeyRight,
KeyHome,
KeyEnd,
KeyInsert,
KeyDelete,
KeyEscape,
}
struct Reader {
priv escapes: ~Trie<Keypress>,
}
pub fn Reader () -> Reader {
Reader { escapes: build_escapes_trie() }
}
impl Reader {
pub fn read (&self) -> Option<Keypress> {
let mut buf = ~"";
loop {
let c = io::stdin().read_char();
if c as int == -1 {
return None;
}
str::push_char(&mut buf, c);
io::print(str::escape_default(buf));
if !self.escapes.has_prefix(buf) {
match self.escapes.find(buf) {
&Some(k) => { return Some(k) }
&None => {
if str::len(buf) == 1 {
return Some(KeyCharacter(str::char_at(buf, 0)));
}
else {
// XXX this is... suboptimal
// really, we need to do an ungetc sort of thing
// with the characters in buf, and then just
// return the first character as a KeyCharacter
fail!(~"unknown escape");
}
}
}
}
}
}
}
// XXX this whole thing needs to be able to deal with caps that don't exist
fn build_escapes_trie () -> ~Trie<Keypress> {
let mut trie = ~Trie();
trie.insert(escape("kbs"), KeyBackspace);
trie.insert(escape("cr"), KeyReturn);
trie.insert(escape("ht"), KeyTab);
trie.insert(escape("kcuu1"), KeyUp);
trie.insert(escape("kcud1"), KeyDown);
trie.insert(escape("kcub1"), KeyLeft);
trie.insert(escape("kcuf1"), KeyRight);
trie.insert(escape("khome"), KeyHome);
trie.insert(escape("kend"), KeyEnd);
trie.insert(escape("kich1"), KeyInsert);
trie.insert(escape("kdch1"), KeyDelete);
for uint::range(1, 12) |i| {
trie.insert(escape(fmt!("kf%d", i as int)), KeyF(i as int));
}
for uint::range(1, 26) |i| {
let s = str::from_char(i as char);
if (trie.find(s).is_none()) {
trie.insert(s, KeyCtrl(i as char));
}
}
trie.insert(str::from_char(27 as char), KeyEscape);
trie
}
pub fn isatty() -> bool {
unsafe { c_isatty(0) as bool }
}
pub mod ios;
pub mod info;
mod util;
extern {
#[link_name = "isatty"]
fn c_isatty(fd: c_int) -> c_int;
}
|
