| // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // Code for creating styled buffers |
| |
| use snippet::{Style, StyledString}; |
| |
| #[derive(Debug)] |
| pub struct StyledBuffer { |
| text: Vec<Vec<char>>, |
| styles: Vec<Vec<Style>>, |
| } |
| |
| impl StyledBuffer { |
| pub fn new() -> StyledBuffer { |
| StyledBuffer { |
| text: vec![], |
| styles: vec![], |
| } |
| } |
| |
| pub fn copy_tabs(&mut self, row: usize) { |
| if row < self.text.len() { |
| for i in row+1..self.text.len() { |
| for j in 0..self.text[i].len() { |
| if self.text[row].len() > j && |
| self.text[row][j] == '\t' && |
| self.text[i][j] == ' ' { |
| self.text[i][j] = '\t'; |
| } |
| } |
| } |
| } |
| } |
| |
| pub fn render(&mut self) -> Vec<Vec<StyledString>> { |
| let mut output: Vec<Vec<StyledString>> = vec![]; |
| let mut styled_vec: Vec<StyledString> = vec![]; |
| |
| //before we render, do a little patch-up work to support tabs |
| self.copy_tabs(3); |
| |
| for (row, row_style) in self.text.iter().zip(&self.styles) { |
| let mut current_style = Style::NoStyle; |
| let mut current_text = String::new(); |
| |
| for (&c, &s) in row.iter().zip(row_style) { |
| if s != current_style { |
| if !current_text.is_empty() { |
| styled_vec.push(StyledString { |
| text: current_text, |
| style: current_style, |
| }); |
| } |
| current_style = s; |
| current_text = String::new(); |
| } |
| current_text.push(c); |
| } |
| if !current_text.is_empty() { |
| styled_vec.push(StyledString { |
| text: current_text, |
| style: current_style, |
| }); |
| } |
| |
| // We're done with the row, push and keep going |
| output.push(styled_vec); |
| |
| styled_vec = vec![]; |
| } |
| |
| output |
| } |
| |
| fn ensure_lines(&mut self, line: usize) { |
| while line >= self.text.len() { |
| self.text.push(vec![]); |
| self.styles.push(vec![]); |
| } |
| } |
| |
| pub fn putc(&mut self, line: usize, col: usize, chr: char, style: Style) { |
| self.ensure_lines(line); |
| if col < self.text[line].len() { |
| self.text[line][col] = chr; |
| self.styles[line][col] = style; |
| } else { |
| let mut i = self.text[line].len(); |
| while i < col { |
| self.text[line].push(' '); |
| self.styles[line].push(Style::NoStyle); |
| i += 1; |
| } |
| self.text[line].push(chr); |
| self.styles[line].push(style); |
| } |
| } |
| |
| pub fn puts(&mut self, line: usize, col: usize, string: &str, style: Style) { |
| let mut n = col; |
| for c in string.chars() { |
| self.putc(line, n, c, style); |
| n += 1; |
| } |
| } |
| |
| pub fn set_style(&mut self, line: usize, col: usize, style: Style) { |
| if self.styles.len() > line && self.styles[line].len() > col { |
| self.styles[line][col] = style; |
| } |
| } |
| |
| pub fn prepend(&mut self, line: usize, string: &str, style: Style) { |
| self.ensure_lines(line); |
| let string_len = string.len(); |
| |
| // Push the old content over to make room for new content |
| for _ in 0..string_len { |
| self.styles[line].insert(0, Style::NoStyle); |
| self.text[line].insert(0, ' '); |
| } |
| |
| self.puts(line, 0, string, style); |
| } |
| |
| pub fn append(&mut self, line: usize, string: &str, style: Style) { |
| if line >= self.text.len() { |
| self.puts(line, 0, string, style); |
| } else { |
| let col = self.text[line].len(); |
| self.puts(line, col, string, style); |
| } |
| } |
| |
| pub fn num_lines(&self) -> usize { |
| self.text.len() |
| } |
| } |