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Redo frame

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This commit is contained in:
Jonathan Turner 2019-07-25 17:19:19 +12:00
parent f2873edf6c
commit e74856a14e
1 changed files with 102 additions and 40 deletions
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142
src/plugins/textview.rs
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@ -7,11 +7,20 @@ use nu::{
Spanned, Value,
};
use rawkey::RawKey;
use std::io::Write;
use syntect::easy::HighlightLines;
use syntect::highlighting::{Style, ThemeSet};
use syntect::parsing::SyntaxSet;
use syntect::util::as_24_bit_terminal_escaped;
use std::io::Write;
use std::path::Path;
use std::{thread, time::Duration};
enum DrawCommand {
DrawString(Style, String),
NextLine,
}
struct TextView;
impl TextView {
@ -37,36 +46,70 @@ impl Plugin for TextView {
}
}
fn paint_textview(lines: &Vec<String>, starting_row: usize) -> (u16, u16) {
fn paint_textview(
draw_commands: &Vec<DrawCommand>,
starting_row: usize,
use_color_buffer: bool,
) -> usize {
let terminal = terminal();
let cursor = cursor();
let _ = terminal.clear(crossterm::ClearType::All);
let size = terminal.terminal_size();
let _ = cursor.goto(0, 0);
let mut total_max_num_lines = 0;
for line in lines.iter().skip(starting_row).take(size.1 as usize) {
//let pos = cursor.pos();
let stripped_line = strip_ansi_escapes::strip(&line.as_bytes()).unwrap();
let line_length = stripped_line.len();
// render
let mut pos = 0;
let width = size.0 as usize + 1;
let height = size.1 as usize;
let mut frame_buffer = vec![]; //(' ', 0, 0, 0); max_pos];
let max_num_lines = line_length as u16 / size.0
+ if (line_length as u16 % size.0) > 0 {
1
} else {
0
};
total_max_num_lines += max_num_lines;
if total_max_num_lines < size.1 {
print!("{}\r\n", line);
} else {
break;
for command in draw_commands {
match command {
DrawCommand::DrawString(style, string) => {
for chr in string.chars() {
frame_buffer.push((
chr,
style.foreground.r,
style.foreground.g,
style.foreground.b,
));
pos += 1;
}
}
DrawCommand::NextLine => {
for _ in 0..(width - pos % width) {
frame_buffer.push((' ', 0, 0, 0));
}
pos += width - pos % width;
}
}
}
// if it's a short buffer, be sure to fill it out
while pos < (width * height) {
frame_buffer.push((' ', 0, 0, 0));
pos += 1;
}
// display
let mut ansi_strings = vec![];
let mut normal_chars = vec![];
for c in &frame_buffer[starting_row * width..(starting_row + height) * width] {
if use_color_buffer {
ansi_strings.push(ansi_term::Colour::RGB(c.1, c.2, c.3).paint(format!("{}", c.0)));
} else {
normal_chars.push(c.0);
}
}
let _ = cursor.goto(0, 0);
if use_color_buffer {
print!("{}", ansi_term::ANSIStrings(&ansi_strings));
} else {
let s: String = normal_chars.into_iter().collect();
print!("{}", s);
}
let _ = cursor.goto(0, size.1);
print!(
"{}",
@ -76,10 +119,10 @@ fn paint_textview(lines: &Vec<String>, starting_row: usize) -> (u16, u16) {
let _ = std::io::stdout().flush();
size
frame_buffer.len() / width
}
fn scroll_view_lines(lines: Vec<String>) {
fn scroll_view_lines(draw_commands: Vec<DrawCommand>, use_color_buffer: bool) {
let mut starting_row = 0;
let rawkey = RawKey::new();
@ -90,7 +133,11 @@ fn scroll_view_lines(lines: Vec<String>) {
let input = crossterm::input();
let _ = input.read_async();
let mut size = paint_textview(&lines, starting_row);
let terminal = terminal();
let mut size = terminal.terminal_size();
let mut max_bottom_line = size.1 as usize;
paint_textview(&draw_commands, starting_row, use_color_buffer);
loop {
if rawkey.is_pressed(rawkey::KeyCode::Escape) {
break;
@ -98,17 +145,25 @@ fn scroll_view_lines(lines: Vec<String>) {
if rawkey.is_pressed(rawkey::KeyCode::UpArrow) {
if starting_row > 0 {
starting_row -= 1;
size = paint_textview(&lines, starting_row);
max_bottom_line =
paint_textview(&draw_commands, starting_row, use_color_buffer);
}
}
if rawkey.is_pressed(rawkey::KeyCode::DownArrow) {
if starting_row < (std::cmp::max(size.1 as usize, lines.len()) - size.1 as usize) {
if starting_row < (max_bottom_line - size.1 as usize) {
starting_row += 1;
size = paint_textview(&lines, starting_row);
}
max_bottom_line = paint_textview(&draw_commands, starting_row, use_color_buffer);
}
thread::sleep(Duration::from_millis(50));
let new_size = terminal.terminal_size();
if size != new_size {
size = new_size;
let _ = terminal.clear(crossterm::ClearType::All);
max_bottom_line = paint_textview(&draw_commands, starting_row, use_color_buffer);
}
}
let _ = cursor.show();
@ -125,9 +180,12 @@ fn scroll_view_lines(lines: Vec<String>) {
}
fn scroll_view(s: &str) {
let lines: Vec<_> = s.lines().map(|x| x.to_string()).collect();
scroll_view_lines(lines);
let mut v = vec![];
for line in s.lines() {
v.push(DrawCommand::DrawString(Style::default(), line.to_string()));
v.push(DrawCommand::NextLine);
}
scroll_view_lines(v, false);
}
fn view_text_value(value: &Spanned<Value>, source_map: &SourceMap) {
@ -144,11 +202,6 @@ fn view_text_value(value: &Spanned<Value>, source_map: &SourceMap) {
let path = Path::new(file);
match path.extension() {
Some(extension) => {
use syntect::easy::HighlightLines;
use syntect::highlighting::{Style, ThemeSet};
use syntect::parsing::SyntaxSet;
use syntect::util::as_24_bit_terminal_escaped;
// Load these once at the start of your program
let ps: SyntaxSet = syntect::dumps::from_binary(include_bytes!(
"../../assets/syntaxes.bin"
@ -166,11 +219,20 @@ fn view_text_value(value: &Spanned<Value>, source_map: &SourceMap) {
let mut v = vec![];
for line in s.lines() {
let ranges: Vec<(Style, &str)> = h.highlight(line, &ps);
let escaped =
as_24_bit_terminal_escaped(&ranges[..], false);
v.push(format!("{}", escaped));
// let escaped =
// as_24_bit_terminal_escaped(&ranges[..], false);
// v.push(format!("{}", escaped));
for range in ranges {
v.push(DrawCommand::DrawString(
range.0,
range.1.to_string(),
));
}
v.push(DrawCommand::NextLine);
}
scroll_view_lines(v);
scroll_view_lines(v, true);
} else {
scroll_view(s);
}