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//! This library is primarily concerned with generating //! strings that can be used by your favorite terminal //! stream manipulation system to display a progress bar //! #### Example //! //! ``` //! extern crate termion; //! extern crate progress_string //! //! fn main() { //! let bar = progress_string::BarBuilder::new() //! .total(10000) //! .include_percent() //! .get_bar(); //! println!("starting the progress"); //! for i in 0..10000 { //! bar.replace(i); //! print!("{}{}", termion::cursor::Left(bar.get_last_width(), bar.to_string()) //! std::thread::sleep(100); //! } //! println!("done with progress"); //! } //! ``` /// Represents a progress bar, this can be used /// to get your progress string pub struct Bar { pub current_partial: usize, pub total: usize, width: usize, empty_char: char, full_char: char, include_percent: bool, previous_text_width: usize, } impl Bar { /// copy the underlying bar into a new instance /// primarily used for the BarBuilder implementation fn copy(self) -> Bar { Bar { ..self } } } /// Helper struct for building a /// progress bar /// /// #### Examples /// ``` /// let bar = BarBuilder::new() /// .total(1000000) /// .width(20) /// .empty_char('0') /// .full_char('X') /// .include_percent() /// .get_bar(); /// ``` /// the above would look something like this /// `[XXXXXXXXXX0000000000] 50.00%` pub struct BarBuilder { bar: Bar, } impl BarBuilder { /// Create a new Bar Builder pub fn new() -> BarBuilder { BarBuilder { bar: Bar::default(), } } /// Add update the total (default 100) /// let thousand = BarBuilder::new().total(1000).get_bar(); /// /// #### Examples /// ``` /// thousand.update(200); /// //yeilds [█ ] /// ``` pub fn total(mut self, total: usize) -> BarBuilder { self.bar.total = total; self } /// Update the progress section's width (default 50) /// ``` /// let bar = BarBuilder::new().width(10); /// ///yeids [ ] /// ``` pub fn width(mut self, width: usize) -> BarBuilder { self.bar.width = width; self } /// Update the character you want to use as an empty section /// of the progress bar (default ' ') /// /// #### Examples /// ``` /// let zero_emp = BarBuilder::new().empty_char('0').get_bar(); /// yeilds /// // [██████████00000000000] /// ``` pub fn empty_char(mut self, character: char) -> BarBuilder { self.bar.empty_char = character; self } /// Update the character you want to sue as a full section of /// the bar (default '█') /// /// #### Examples /// ``` /// let x_bar = BarBuilder::new().full_char('X').get_bar(); /// //yeilds [XXXXXX ] /// let y_bar = BarBuilder::new().full_char('Y').get_bar(); /// //yeilds [YYYYYY ] /// ``` pub fn full_char(mut self, character: char) -> BarBuilder { self.bar.full_char = character; self } /// Update the bar to include the percent after the /// bar representation (default false) /// /// #### Examples /// ``` /// let no_p = BarBuilder::new().include_percent().get_bar(); /// //yeilds [██████████ ] 50.00% /// let with_p = BarBuilder::new() /// //yeilds [██████████ ] /// ``` pub fn include_percent(mut self) -> BarBuilder { self.bar.include_percent = true; self } /// Complete building your bar and return the /// updated struct /// /// #### Examples /// ``` /// let bar = BarBuilder::new().get_bar(); /// //yeilds a default bar instance /// ``` pub fn get_bar(self) -> Bar { self.bar.copy() } } impl Bar { ///Bar constructor with default values pub fn default() -> Bar { Bar { current_partial: 0, total: 100, width: 50, full_char: '█', empty_char: ' ', include_percent: false, previous_text_width: 0 } } } impl Bar { /// Update the current_partial value by adding the /// to_add parameter /// /// #### Examples /// ``` /// let mut bar = Bar::default(); /// bar.update(10); /// assert_eq!(bar.current_partial, 110); /// ``` pub fn update(&mut self, to_add: usize) { self.previous_text_width = self.get_width(); self.current_partial += to_add; } /// Update the cureent partial by replacing the current /// value /// /// #### Examples /// ``` /// let mut bar = Bar::default(); /// bar.replace(10); /// assert_eq!(bar.current_partial, 10); pub fn replace(&mut self, new_progress: usize) { self.previous_text_width = self.get_width(); self.current_partial = new_progress; } } impl Bar { /// Get the string representation of the progress bar /// This stiring will include brackets ([]) around the /// empty/full characters, the width is determined by /// the width property. /// If `bar.include_percent == true` /// the resulting string will include a space and the /// percent with 2 decimal palces followed by %. /// /// #### Examples /// ``` /// let mut with_percent = BarBuilder::new().include_percent() /// .get_bar(); /// with_percent.update(50); /// println!("{}", with_percent.to_string()); /// //prints [█████████████████████████ ] 50.00% /// let mut no_percent = BarBuilder::new().get_bar(); /// no_percent.update(50); /// //prints [█████████████████████████ ] /// ``` pub fn to_string(&self) -> String { let percent = self.calculate_percent(); let mut progress_bar = String::from("["); for i in 0..self.width { if (i as f32) < (self.width as f32 * percent) { progress_bar.push(self.full_char.clone()); } else { progress_bar.push(self.empty_char.clone()); } } progress_bar.push(']'); if self.include_percent { progress_bar.push_str(format!(" {:.2}%", percent * 100.0).as_str()); } progress_bar } } impl Bar { /// Get the current width of characters in the bar, this /// includes the brackets, spaces and percent if set /// /// #### Examples /// ``` /// let bar = Bar::default(); /// println!("{}", bar.get_width()); /// //prints 52 /// let mut with_percent = BarBuilder;;new().include_precent(); /// println!("{}", bar.get_width()); /// //prints 58 /// with_percent.update(10); /// println!("{}", bar.get_width()); /// //prints 59 /// with_percent.replace(100); /// println!("{}", bar.get_width()); /// //prints 60 /// ``` pub fn get_width(&self) -> usize { match self.include_percent { true => { let current_percent = self.calculate_percent(); if current_percent >= 0.95 { self.width + 10 } else if current_percent > 0.095 { self.width + 9 } else { self.width + 8 } } _ => self.width + 2 } } /// Similar to `get_width` but gets the value /// before the last `update` or `replace` call /// this is useful for when you are trying to clear /// the terminal pub fn get_last_width(&self) -> usize { self.previous_text_width } } impl Bar { fn calculate_percent(&self) -> f32 { (self.current_partial as f32 / self.total as f32) } } #[cfg(test)] mod tests { use super::*; #[test] fn builder_test() { assert_eq!(2 + 2, 4); } #[test] fn update_test() { } #[test] fn replace_test() { } #[test] fn to_string_test() { } }