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use std::collections::HashMap;
use std::env;
use std::io::prelude::*;
use std::io;
use attr;
use color;
use Terminal;
use UnwrappableTerminal;
use self::searcher::open;
use self::parser::compiled::{parse, msys_terminfo};
use self::parm::{expand, Number, Variables};
#[derive(Debug)]
pub struct TermInfo {
pub names: Vec<String> ,
pub bools: HashMap<String, bool>,
pub numbers: HashMap<String, u16>,
pub strings: HashMap<String, Vec<u8> >
}
pub mod searcher;
pub mod parser {
pub mod compiled;
}
pub mod parm;
fn cap_for_attr(attr: attr::Attr) -> &'static str {
match attr {
attr::Bold => "bold",
attr::Dim => "dim",
attr::Italic(true) => "sitm",
attr::Italic(false) => "ritm",
attr::Underline(true) => "smul",
attr::Underline(false) => "rmul",
attr::Blink => "blink",
attr::Standout(true) => "smso",
attr::Standout(false) => "rmso",
attr::Reverse => "rev",
attr::Secure => "invis",
attr::ForegroundColor(_) => "setaf",
attr::BackgroundColor(_) => "setab"
}
}
pub struct TerminfoTerminal<T> {
num_colors: u16,
out: T,
ti: Box<TermInfo>
}
impl<T: Write+Send+'static> Terminal<T> for TerminfoTerminal<T> {
fn fg(&mut self, color: color::Color) -> io::Result<bool> {
let color = self.dim_if_necessary(color);
if self.num_colors > color {
let s = expand(self.ti
.strings
.get("setaf")
.unwrap()
,
&[Number(color as isize)], &mut Variables::new());
if s.is_ok() {
try!(self.out.write_all(&s.unwrap()));
return Ok(true)
}
}
Ok(false)
}
fn bg(&mut self, color: color::Color) -> io::Result<bool> {
let color = self.dim_if_necessary(color);
if self.num_colors > color {
let s = expand(self.ti
.strings
.get("setab")
.unwrap()
,
&[Number(color as isize)], &mut Variables::new());
if s.is_ok() {
try!(self.out.write_all(&s.unwrap()));
return Ok(true)
}
}
Ok(false)
}
fn attr(&mut self, attr: attr::Attr) -> io::Result<bool> {
match attr {
attr::ForegroundColor(c) => self.fg(c),
attr::BackgroundColor(c) => self.bg(c),
_ => {
let cap = cap_for_attr(attr);
let parm = self.ti.strings.get(cap);
if parm.is_some() {
let s = expand(parm.unwrap(),
&[],
&mut Variables::new());
if s.is_ok() {
try!(self.out.write_all(&s.unwrap()));
return Ok(true)
}
}
Ok(false)
}
}
}
fn supports_attr(&self, attr: attr::Attr) -> bool {
match attr {
attr::ForegroundColor(_) | attr::BackgroundColor(_) => {
self.num_colors > 0
}
_ => {
let cap = cap_for_attr(attr);
self.ti.strings.get(cap).is_some()
}
}
}
fn reset(&mut self) -> io::Result<()> {
let mut cap = self.ti.strings.get("sgr0");
if cap.is_none() {
cap = self.ti.strings.get("sgr");
if cap.is_none() {
cap = self.ti.strings.get("op");
}
}
let s = cap.map_or(Err("can't find terminfo capability `sgr0`".to_string()), |op| {
expand(op, &[], &mut Variables::new())
});
if s.is_ok() {
return self.out.write_all(&s.unwrap())
}
Ok(())
}
fn get_ref<'a>(&'a self) -> &'a T { &self.out }
fn get_mut<'a>(&'a mut self) -> &'a mut T { &mut self.out }
}
impl<T: Write+Send+'static> UnwrappableTerminal<T> for TerminfoTerminal<T> {
fn unwrap(self) -> T { self.out }
}
impl<T: Write+Send+'static> TerminfoTerminal<T> {
pub fn new(out: T) -> Option<Box<Terminal<T>+Send+'static>> {
let term = match env::var("TERM") {
Ok(t) => t,
Err(..) => {
debug!("TERM environment variable not defined");
return None;
}
};
let mut file = match open(&term[..]) {
Ok(f) => f,
Err(err) => return match env::var("MSYSCON") {
Ok(ref val) if &val[..] == "mintty.exe" => {
Some(box TerminfoTerminal{
out: out,
ti: msys_terminfo(),
num_colors: 8,
})
},
_ => {
debug!("error finding terminfo entry: {:?}", err);
None
},
},
};
let ti = parse(&mut file, false);
if ti.is_err() {
debug!("error parsing terminfo entry: {:?}", ti.err().unwrap());
return None;
}
let inf = ti.unwrap();
let nc = if inf.strings.get("setaf").is_some()
&& inf.strings.get("setab").is_some() {
inf.numbers.get("colors").map_or(0, |&n| n)
} else { 0 };
return Some(box TerminfoTerminal {out: out,
ti: inf,
num_colors: nc});
}
fn dim_if_necessary(&self, color: color::Color) -> color::Color {
if color >= self.num_colors && color >= 8 && color < 16 {
color-8
} else { color }
}
}
impl<T: Write> Write for TerminfoTerminal<T> {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
self.out.write(buf)
}
fn flush(&mut self) -> io::Result<()> {
self.out.flush()
}
}