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