1 // Copyright 2013-2015 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 //! Terminal formatting library.
13 //! This crate provides the `Terminal` trait, which abstracts over an [ANSI
14 //! Terminal][ansi] to provide color printing, among other things. There are two
15 //! implementations, the `TerminfoTerminal`, which uses control characters from
16 //! a [terminfo][ti] database, and `WinConsole`, which uses the [Win32 Console
22 //! # #![feature(rustc_private)]
23 //! extern crate term;
24 //! use std::io::prelude::*;
27 //! let mut t = term::stdout().unwrap();
29 //! t.fg(term::color::GREEN).unwrap();
30 //! write!(t, "hello, ").unwrap();
32 //! t.fg(term::color::RED).unwrap();
33 //! writeln!(t, "world!").unwrap();
35 //! assert!(t.reset().unwrap());
39 //! [ansi]: https://en.wikipedia.org/wiki/ANSI_escape_code
40 //! [win]: http://msdn.microsoft.com/en-us/library/windows/desktop/ms682010%28v=vs.85%29.aspx
41 //! [ti]: https://en.wikipedia.org/wiki/Terminfo
43 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
44 html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
45 html_root_url = "https://doc.rust-lang.org/nightly/",
46 html_playground_url = "https://play.rust-lang.org/",
47 test(attr(deny(warnings))))]
48 #![deny(missing_docs)]
50 #![cfg_attr(windows, feature(libc))]
51 // Handle rustfmt skips
52 #![feature(custom_attribute)]
54 #![allow(unused_attributes)]
56 use std::io::prelude::*;
58 pub use terminfo::TerminfoTerminal;
60 pub use win::WinConsole;
62 use std::io::{self, Stdout, Stderr};
69 /// Alias for stdout terminals.
70 pub type StdoutTerminal = dyn Terminal<Output = Stdout> + Send;
71 /// Alias for stderr terminals.
72 pub type StderrTerminal = dyn Terminal<Output = Stderr> + Send;
75 /// Return a Terminal wrapping stdout, or None if a terminal couldn't be
77 pub fn stdout() -> Option<Box<StdoutTerminal>> {
78 TerminfoTerminal::new(io::stdout()).map(|t| Box::new(t) as Box<StdoutTerminal>)
82 /// Return a Terminal wrapping stdout, or None if a terminal couldn't be
84 pub fn stdout() -> Option<Box<StdoutTerminal>> {
85 TerminfoTerminal::new(io::stdout())
86 .map(|t| Box::new(t) as Box<StdoutTerminal>)
87 .or_else(|| WinConsole::new(io::stdout()).ok().map(|t| Box::new(t) as Box<StdoutTerminal>))
91 /// Return a Terminal wrapping stderr, or None if a terminal couldn't be
93 pub fn stderr() -> Option<Box<StderrTerminal>> {
94 TerminfoTerminal::new(io::stderr()).map(|t| Box::new(t) as Box<StderrTerminal>)
98 /// Return a Terminal wrapping stderr, or None if a terminal couldn't be
100 pub fn stderr() -> Option<Box<StderrTerminal>> {
101 TerminfoTerminal::new(io::stderr())
102 .map(|t| Box::new(t) as Box<StderrTerminal>)
103 .or_else(|| WinConsole::new(io::stderr()).ok().map(|t| Box::new(t) as Box<StderrTerminal>))
107 /// Terminal color definitions
108 #[allow(missing_docs)]
110 /// Number for a terminal color
111 pub type Color = u16;
113 pub const BLACK: Color = 0;
114 pub const RED: Color = 1;
115 pub const GREEN: Color = 2;
116 pub const YELLOW: Color = 3;
117 pub const BLUE: Color = 4;
118 pub const MAGENTA: Color = 5;
119 pub const CYAN: Color = 6;
120 pub const WHITE: Color = 7;
122 pub const BRIGHT_BLACK: Color = 8;
123 pub const BRIGHT_RED: Color = 9;
124 pub const BRIGHT_GREEN: Color = 10;
125 pub const BRIGHT_YELLOW: Color = 11;
126 pub const BRIGHT_BLUE: Color = 12;
127 pub const BRIGHT_MAGENTA: Color = 13;
128 pub const BRIGHT_CYAN: Color = 14;
129 pub const BRIGHT_WHITE: Color = 15;
132 /// Terminal attributes for use with term.attr().
134 /// Most attributes can only be turned on and must be turned off with term.reset().
135 /// The ones that can be turned off explicitly take a boolean value.
136 /// Color is also represented as an attribute for convenience.
137 #[derive(Debug, PartialEq, Eq, Copy, Clone)]
139 /// Bold (or possibly bright) mode
141 /// Dim mode, also called faint or half-bright. Often not supported
143 /// Italics mode. Often not supported
149 /// Standout mode. Often implemented as Reverse, sometimes coupled with Bold
151 /// Reverse mode, inverts the foreground and background colors
153 /// Secure mode, also called invis mode. Hides the printed text
155 /// Convenience attribute to set the foreground color
156 ForegroundColor(color::Color),
157 /// Convenience attribute to set the background color
158 BackgroundColor(color::Color),
161 /// A terminal with similar capabilities to an ANSI Terminal
162 /// (foreground/background colors etc).
163 pub trait Terminal: Write {
164 /// The terminal's output writer type.
167 /// Sets the foreground color to the given color.
169 /// If the color is a bright color, but the terminal only supports 8 colors,
170 /// the corresponding normal color will be used instead.
172 /// Returns `Ok(true)` if the color was set, `Ok(false)` otherwise, and `Err(e)`
173 /// if there was an I/O error.
174 fn fg(&mut self, color: color::Color) -> io::Result<bool>;
176 /// Sets the background color to the given color.
178 /// If the color is a bright color, but the terminal only supports 8 colors,
179 /// the corresponding normal color will be used instead.
181 /// Returns `Ok(true)` if the color was set, `Ok(false)` otherwise, and `Err(e)`
182 /// if there was an I/O error.
183 fn bg(&mut self, color: color::Color) -> io::Result<bool>;
185 /// Sets the given terminal attribute, if supported. Returns `Ok(true)`
186 /// if the attribute was supported, `Ok(false)` otherwise, and `Err(e)` if
187 /// there was an I/O error.
188 fn attr(&mut self, attr: Attr) -> io::Result<bool>;
190 /// Returns whether the given terminal attribute is supported.
191 fn supports_attr(&self, attr: Attr) -> bool;
193 /// Resets all terminal attributes and colors to their defaults.
195 /// Returns `Ok(true)` if the terminal was reset, `Ok(false)` otherwise, and `Err(e)` if there
196 /// was an I/O error.
198 /// *Note: This does not flush.*
200 /// That means the reset command may get buffered so, if you aren't planning on doing anything
201 /// else that might flush stdout's buffer (e.g., writing a line of text), you should flush after
203 fn reset(&mut self) -> io::Result<bool>;
205 /// Gets an immutable reference to the stream inside
206 fn get_ref(&self) -> &Self::Output;
208 /// Gets a mutable reference to the stream inside
209 fn get_mut(&mut self) -> &mut Self::Output;
211 /// Returns the contained stream, destroying the `Terminal`
212 fn into_inner(self) -> Self::Output where Self: Sized;