1 // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! Simple ANSI color library
13 #![crate_id = "term#0.11-pre"]
14 #![comment = "Simple ANSI color library"]
15 #![license = "MIT/ASL2"]
16 #![crate_type = "rlib"]
17 #![crate_type = "dylib"]
18 #![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
19 html_favicon_url = "http://www.rust-lang.org/favicon.ico",
20 html_root_url = "http://static.rust-lang.org/doc/master")]
22 #![feature(macro_rules)]
26 extern crate collections;
30 use terminfo::TermInfo;
31 use terminfo::searcher::open;
32 use terminfo::parser::compiled::{parse, msys_terminfo};
33 use terminfo::parm::{expand, Number, Variables};
37 // FIXME (#2807): Windows support.
39 /// Terminal color definitions
41 /// Number for a terminal color
44 pub static BLACK: Color = 0u16;
45 pub static RED: Color = 1u16;
46 pub static GREEN: Color = 2u16;
47 pub static YELLOW: Color = 3u16;
48 pub static BLUE: Color = 4u16;
49 pub static MAGENTA: Color = 5u16;
50 pub static CYAN: Color = 6u16;
51 pub static WHITE: Color = 7u16;
53 pub static BRIGHT_BLACK: Color = 8u16;
54 pub static BRIGHT_RED: Color = 9u16;
55 pub static BRIGHT_GREEN: Color = 10u16;
56 pub static BRIGHT_YELLOW: Color = 11u16;
57 pub static BRIGHT_BLUE: Color = 12u16;
58 pub static BRIGHT_MAGENTA: Color = 13u16;
59 pub static BRIGHT_CYAN: Color = 14u16;
60 pub static BRIGHT_WHITE: Color = 15u16;
63 /// Terminal attributes
65 /// Terminal attributes for use with term.attr().
67 /// Most attributes can only be turned on and must be turned off with term.reset().
68 /// The ones that can be turned off explicitly take a boolean value.
69 /// Color is also represented as an attribute for convenience.
71 /// Bold (or possibly bright) mode
73 /// Dim mode, also called faint or half-bright. Often not supported
75 /// Italics mode. Often not supported
81 /// Standout mode. Often implemented as Reverse, sometimes coupled with Bold
83 /// Reverse mode, inverts the foreground and background colors
85 /// Secure mode, also called invis mode. Hides the printed text
87 /// Convenience attribute to set the foreground color
88 ForegroundColor(super::color::Color),
89 /// Convenience attribute to set the background color
90 BackgroundColor(super::color::Color)
94 fn cap_for_attr(attr: attr::Attr) -> &'static str {
98 attr::Italic(true) => "sitm",
99 attr::Italic(false) => "ritm",
100 attr::Underline(true) => "smul",
101 attr::Underline(false) => "rmul",
102 attr::Blink => "blink",
103 attr::Standout(true) => "smso",
104 attr::Standout(false) => "rmso",
105 attr::Reverse => "rev",
106 attr::Secure => "invis",
107 attr::ForegroundColor(_) => "setaf",
108 attr::BackgroundColor(_) => "setab"
112 /// A Terminal that knows how many colors it supports, with a reference to its
113 /// parsed TermInfo database record.
114 pub struct Terminal<T> {
120 impl<T: Writer> Terminal<T> {
121 /// Returns a wrapped output stream (`Terminal<T>`) as a `Result`.
123 /// Returns `Err()` if the TERM environment variable is undefined.
124 /// TERM should be set to something like `xterm-color` or `screen-256color`.
126 /// Returns `Err()` on failure to open the terminfo database correctly.
127 /// Also, in the event that the individual terminfo database entry can not
129 pub fn new(out: T) -> Result<Terminal<T>, ~str> {
130 let term = match os::getenv("TERM") {
132 None => return Err("TERM environment variable undefined".to_owned())
135 let mut file = match open(term) {
138 if "cygwin" == term { // msys terminal
149 let inf = try!(parse(&mut file, false));
151 let nc = if inf.strings.find_equiv(&("setaf")).is_some()
152 && inf.strings.find_equiv(&("setab")).is_some() {
153 inf.numbers.find_equiv(&("colors")).map_or(0, |&n| n)
156 return Ok(Terminal {out: out, ti: inf, num_colors: nc});
158 /// Sets the foreground color to the given color.
160 /// If the color is a bright color, but the terminal only supports 8 colors,
161 /// the corresponding normal color will be used instead.
163 /// Returns `Ok(true)` if the color was set, `Ok(false)` otherwise, and `Err(e)`
164 /// if there was an I/O error.
165 pub fn fg(&mut self, color: color::Color) -> io::IoResult<bool> {
166 let color = self.dim_if_necessary(color);
167 if self.num_colors > color {
168 let s = expand(self.ti
170 .find_equiv(&("setaf"))
173 [Number(color as int)], &mut Variables::new());
175 try!(self.out.write(s.unwrap().as_slice()));
181 /// Sets the background color to the given color.
183 /// If the color is a bright color, but the terminal only supports 8 colors,
184 /// the corresponding normal color will be used instead.
186 /// Returns `Ok(true)` if the color was set, `Ok(false)` otherwise, and `Err(e)`
187 /// if there was an I/O error.
188 pub fn bg(&mut self, color: color::Color) -> io::IoResult<bool> {
189 let color = self.dim_if_necessary(color);
190 if self.num_colors > color {
191 let s = expand(self.ti
193 .find_equiv(&("setab"))
196 [Number(color as int)], &mut Variables::new());
198 try!(self.out.write(s.unwrap().as_slice()));
205 /// Sets the given terminal attribute, if supported.
206 /// Returns `Ok(true)` if the attribute was supported, `Ok(false)` otherwise,
207 /// and `Err(e)` if there was an I/O error.
208 pub fn attr(&mut self, attr: attr::Attr) -> io::IoResult<bool> {
210 attr::ForegroundColor(c) => self.fg(c),
211 attr::BackgroundColor(c) => self.bg(c),
213 let cap = cap_for_attr(attr);
214 let parm = self.ti.strings.find_equiv(&cap);
216 let s = expand(parm.unwrap().as_slice(),
218 &mut Variables::new());
220 try!(self.out.write(s.unwrap().as_slice()));
229 /// Returns whether the given terminal attribute is supported.
230 pub fn supports_attr(&self, attr: attr::Attr) -> bool {
232 attr::ForegroundColor(_) | attr::BackgroundColor(_) => {
236 let cap = cap_for_attr(attr);
237 self.ti.strings.find_equiv(&cap).is_some()
242 /// Resets all terminal attributes and color to the default.
244 pub fn reset(&mut self) -> io::IoResult<()> {
245 let mut cap = self.ti.strings.find_equiv(&("sgr0"));
247 // are there any terminals that have color/attrs and not sgr0?
248 // Try falling back to sgr, then op
249 cap = self.ti.strings.find_equiv(&("sgr"));
251 cap = self.ti.strings.find_equiv(&("op"));
254 let s = cap.map_or(Err("can't find terminfo capability `sgr0`".to_owned()), |op| {
255 expand(op.as_slice(), [], &mut Variables::new())
258 return self.out.write(s.unwrap().as_slice())
263 fn dim_if_necessary(&self, color: color::Color) -> color::Color {
264 if color >= self.num_colors && color >= 8 && color < 16 {
269 /// Returns the contained stream
270 pub fn unwrap(self) -> T { self.out }
272 /// Gets an immutable reference to the stream inside
273 pub fn get_ref<'a>(&'a self) -> &'a T { &self.out }
275 /// Gets a mutable reference to the stream inside
276 pub fn get_mut<'a>(&'a mut self) -> &'a mut T { &mut self.out }
279 impl<T: Writer> Writer for Terminal<T> {
280 fn write(&mut self, buf: &[u8]) -> io::IoResult<()> {
284 fn flush(&mut self) -> io::IoResult<()> {