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//! # Console progress bar for Rust
//! 
//! Console progress bar for Rust Inspired from [pb](http://github.com/cheggaaa/pb).  
//! support and tested on MacOS and Linux(should work on Windows too, but not tested yet).
//! 
//! ![Screenshot](https://raw.githubusercontent.com/a8m/pb/master/gif/rec.gif)
//! 
//! ### Examples
//! 1. simple example
//! 
//! ```no_run
//! extern crate pbr;
//! 
//! use pbr::ProgressBar;
//! use std::thread;
//! 
//! fn main() {
//!     let count = 1000;
//!     let mut pb = ProgressBar::new(count);
//!     for _ in 0..count {
//!         pb.inc();
//!         thread::sleep_ms(200);
//!     }
//!     println!("done!");
//! }
//! ```
//! 
//! 2. Broadcast writing(simple file copying)
//! 
//! ```ignore
//! #![feature(io)]
//! extern crate pbr;
//! 
//! use std::io::copy;
//! use std::io::prelude::*;
//! use std::fs::File;
//! use pbr::{ProgressBar, Units};
//! 
//! fn main() {
//!     let mut file = File::open("/usr/share/dict/words").unwrap();
//!     let n_bytes = file.metadata().unwrap().len() as usize;
//!     let mut pb = ProgressBar::new(n_bytes);
//!     pb.set_units(Units::Bytes);
//!     let mut handle = File::create("copy-words").unwrap().broadcast(&mut pb);
//!     copy(&mut file, &mut handle).unwrap();
//!     println!("done!");
//! }
//! ```
extern crate time;
mod tty;
mod pb;
pub use pb::{ProgressBar, Units};


pub struct PbIter<I> where
    I: Iterator,
{
    iter: I,
    progress_bar: ProgressBar,
}

impl<I> PbIter<I> where
    I: Iterator
{
    pub fn new(iter: I) -> Self {
        let size = iter.size_hint().0;
        PbIter {iter: iter, progress_bar: ProgressBar::new(size)}
    }
}

impl<I> Iterator for PbIter<I> where
    I: Iterator
{
    type Item = I::Item;

    fn next(&mut self) -> Option<I::Item> {
        self.progress_bar.inc();
        self.iter.next()
    }

    fn size_hint(&self) -> (usize, Option<usize>) {
        self.iter.size_hint()
    }
}