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rearchitect into buffers, allow opening multiple files

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This commit is contained in:
alice pellerin
2026-03-19 03:06:38 -05:00
parent 5aa64bd7dc
commit cb2eeee932
8 changed files with 783 additions and 715 deletions
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src/app/widget.rs
+4 -442
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@@ -1,446 +1,8 @@
use std::{cmp::min, iter};
use ratatui::{buffer::Buffer, layout::Rect, text::{Line, Text}, widgets::Widget};
use crate::{BYTES_PER_LINE, app::App};
use ratatui::{layout::Rect, widgets::Widget};
use crate::app::App;
impl Widget for &App {
fn render(self, area: Rect, buf: &mut Buffer) {
let screen_end = self.scroll_position + BYTES_PER_LINE * (area.height as usize - 1);
let bytes_end = min(screen_end, self.contents.len());
let bytes_to_render = &self.contents[self.scroll_position..bytes_end];
let (chunks, remainder) = bytes_to_render
.as_chunks::<BYTES_PER_LINE>();
let hex_lines = chunks
.iter()
.zip((self.scroll_position..).step_by(BYTES_PER_LINE))
.map(|(bytes, address)| self.render_line(address, bytes));
let remainder_address = bytes_end - remainder.len();
#[allow(clippy::if_not_else)]
let remainder_line = if !remainder.is_empty() {
Some(self.render_partial_line(remainder_address, remainder))
} else {
None
};
let hex_text: Text = hex_lines
.chain(remainder_line)
.collect();
let hex_area = Rect::new(area.x, area.y, area.width, area.height - 1);
hex_text.render(hex_area, buf);
if self.contents.is_empty() {
Line::from("empty file").render(area, buf);
}
let status_line_area = Rect::new(area.x, area.bottom() - 1, area.width, 1);
self.render_status_line().render(status_line_area, buf);
self.render_extra_statuses()
.right_aligned()
.render(status_line_area, buf);
// if self.partial_action == Some(PartialAction::Space) {
// let input_field_area = Rect::new(area.x, area.bottom() - 2, area.width, 1);
// Span::from("/0F673 ")
// .on_dark_gray()
// .render(input_field_area, buf);
// }
}
}
impl App {
#[allow(mismatched_lifetime_syntaxes)]
fn render_line(&self, address: usize, bytes: &[u8; BYTES_PER_LINE]) -> Line {
iter::once(address::render_address(address))
.chain(self.render_chunks(address, bytes))
.chain(iter::once(" ".into()))
.chain(self.render_character_panel(address, bytes))
.collect()
}
#[allow(mismatched_lifetime_syntaxes)]
fn render_partial_line(&self, address: usize, bytes: &[u8]) -> Line {
iter::once(address::render_address(address))
.chain(self.render_partial_chunks(address, bytes))
.chain(iter::once(" ".into()))
.chain(self.render_character_panel(address, bytes))
.collect()
}
}
mod address {
use ratatui::{style::{Color, Style}, text::Span};
pub fn render_address(address: usize) -> Span<'static> {
Span {
style: Style::new().fg(Color::Rgb(138, 187, 195)),
content: format!("{address:08x} ").into()
}
}
}
mod hex {
use std::{borrow::Cow, mem};
use itertools::{Itertools, repeat_n};
use ratatui::{style::{Color, Style, Stylize}, text::Span};
use crate::{BYTES_PER_CHUNK, BYTES_PER_LINE, CHUNKS_PER_LINE, app::{App, Mode, PartialAction}, cardinality::HasCardinality, cursor::InCursor, custom_greys::CustomGreys, empty_span::empty_span};
impl App {
pub fn render_chunks(
&self,
address: usize,
bytes: &[u8; BYTES_PER_LINE]
) -> impl Iterator<Item=Span<'static>> {
let (chunks, remainder) = bytes.as_chunks::<BYTES_PER_CHUNK>();
assert!(remainder.is_empty(), "BYTES_PER_LINE should be a multiple of BYTES_PER_CHUNK");
#[allow(unstable_name_collisions)]
chunks
.iter()
.copied()
.zip((address..).step_by(BYTES_PER_CHUNK))
.map(|(chunk, address)| self.render_chunk(address, &chunk).collect())
.interleave(
(address..)
.step_by(BYTES_PER_CHUNK)
.take(CHUNKS_PER_LINE)
.skip(1)
.map(|address| vec![self.render_large_space_before(address)])
)
.flatten()
}
pub fn render_partial_chunks(
&self,
address: usize,
bytes: &[u8]
) -> impl Iterator<Item=Span<'static>> {
let (chunks, remainder) = bytes.as_chunks::<BYTES_PER_CHUNK>();
let remainder_address = address + chunks.len() * BYTES_PER_CHUNK;
#[allow(clippy::if_not_else)]
let remainder_chunks: Option<Vec<_>> = if !remainder.is_empty() {
Some(self.render_partial_chunk(remainder_address, remainder).collect())
} else {
None
};
let chunks_rendered = chunks.len() + remainder_chunks.iter().len();
let chunks_not_rendered = CHUNKS_PER_LINE - chunks_rendered;
let spaces_per_chunk = BYTES_PER_CHUNK - 1;
let bytes_not_rendered = BYTES_PER_LINE - bytes.len();
let padding_width = 2 * bytes_not_rendered +
spaces_per_chunk * chunks_not_rendered;
#[allow(unstable_name_collisions)]
chunks
.iter()
.copied()
.zip((address..).step_by(BYTES_PER_CHUNK))
.map(|(chunk, address)| self.render_chunk(address, &chunk).collect())
.chain(remainder_chunks)
.interleave(
(address..)
.step_by(BYTES_PER_CHUNK)
.take(CHUNKS_PER_LINE)
.skip(1)
.map(|address| vec![self.render_large_space_before(address)])
)
.flatten()
.chain(repeat_n(" ".into(), padding_width))
}
fn render_chunk(
&self,
address: usize,
bytes: &[u8; BYTES_PER_CHUNK]
) -> impl Iterator<Item=Span<'static>> {
#[allow(unstable_name_collisions)]
bytes
.iter()
.copied()
.zip(address..)
.map(|(byte, address)| self.render_byte_at(address, byte))
.interleave(
(address..)
.take(BYTES_PER_CHUNK)
.skip(1)
.map(|address| self.render_space_before(address))
)
}
fn render_partial_chunk(
&self,
address: usize,
bytes: &[u8]
) -> impl Iterator<Item=Span<'static>> {
#[allow(unstable_name_collisions)]
bytes
.iter()
.copied()
.zip(address..)
.map(|(byte, address)| self.render_byte_at(address, byte))
.interleave(
(address..)
.take(BYTES_PER_CHUNK)
.skip(1)
.map(|address| self.render_space_before(address))
)
}
fn render_byte_at(
&self,
address: usize,
byte: u8
) -> Span<'static> {
if self.partial_action == Some(PartialAction::Replace) &&
self.cursor.contains(address).is_some()
{
let replaced_byte = self.partial_replace.unwrap_or(0) << 4;
self.render_byte_without_replace_preview(address, replaced_byte)
.black()
} else {
self.render_byte_without_replace_preview(address, byte)
}
}
fn render_byte_without_replace_preview(
&self,
address: usize,
byte: u8
) -> Span<'static> {
const SPAN_FOR_BYTE: [Span; u8::CARDINALITY] = create_byte_lookup_table();
let span = SPAN_FOR_BYTE[byte as usize].clone();
let head_color = match self.mode {
Mode::Select => Color::Yellow,
_ => Color::Gray
};
match self.cursor.contains(address) {
Some(InCursor::Head) => span.bg(head_color),
Some(InCursor::Rest) => span.bg(Color::select_grey()),
None => span,
}
}
fn render_large_space_before(&self, address: usize) -> Span<'static> {
if self.cursor.contains_space_before(address) {
Span {
style: Style::new().bg(Color::select_grey()),
content: " ".into()
}
} else {
" ".into()
}
}
fn render_space_before(&self, address: usize) -> Span<'static> {
if self.cursor.contains_space_before(address) {
Span {
style: Style::new().bg(Color::select_grey()),
content: " ".into()
}
} else {
" ".into()
}
}
}
const fn create_byte_lookup_table() -> [Span<'static>; u8::CARDINALITY] {
let mut result = [const { empty_span() }; u8::CARDINALITY];
let mut index = 0;
while index < u8::CARDINALITY {
result[index].style = style_for_byte(index as u8);
mem::forget(mem::replace(&mut result[index].content, content_for_byte(index as u8)));
index += 1;
}
result
}
const fn style_for_byte(byte: u8) -> Style {
Style::new().fg(fg_for_byte(byte))
}
const fn fg_for_byte(byte: u8) -> Color {
match byte {
0x00 => Color::Rgb(0xA0, 0xA0, 0xA0), // grey
0x01..0x10 => Color::Rgb(0xFF, 0x71, 0xA9), // red
0x10..0x20 => Color::Rgb(0xFF, 0x7A, 0x78), // salmon
0x20..0x30 => Color::Rgb(0xFF, 0x81, 0x23), // red-orange
0x30..0x40 => Color::Rgb(0xF7, 0x93, 0x00), // yellow-orange
0x40..0x50 => Color::Rgb(0xE6, 0x9F, 0x00), // yellow
0x50..0x60 => Color::Rgb(0xC1, 0xB2, 0x00), // green-yellow
0x60..0x70 => Color::Rgb(0x82, 0xC6, 0x00), // lime
0x70..0x80 => Color::Rgb(0x00, 0xD5, 0x00), // green
0x80..0x90 => Color::Rgb(0x00, 0xD4, 0x59), // clover
0x90..0xA0 => Color::Rgb(0x00, 0xD0, 0x91), // teal
0xA0..0xB0 => Color::Rgb(0x00, 0xCC, 0xBB), // cyan
0xB0..0xC0 => Color::Rgb(0x00, 0xC7, 0xDE), // light blue
0xC0..0xD0 => Color::Rgb(0x00, 0xBE, 0xFF), // blue
0xD0..0xE0 => Color::Rgb(0x6C, 0xAF, 0xFF), // blurple
0xE0..0xF0 => Color::Rgb(0xB2, 0x98, 0xFF), // purple
0xF0..0xFF => Color::Rgb(0xFF, 0x4D, 0xFF), // pink
0xFF => Color::White
}
}
const fn content_for_byte(byte: u8) -> Cow<'static, str> {
Cow::Borrowed(hex_for_byte(byte))
}
const fn hex_for_byte(byte: u8) -> &'static str {
const LOOK_UP_TABLE: [&str; u8::CARDINALITY] = ["00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "0A", "0B", "0C", "0D", "0E", "0F", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "1A", "1B", "1C", "1D", "1E", "1F", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "2A", "2B", "2C", "2D", "2E", "2F", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "3A", "3B", "3C", "3D", "3E", "3F", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "4A", "4B", "4C", "4D", "4E", "4F", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "5A", "5B", "5C", "5D", "5E", "5F", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "6A", "6B", "6C", "6D", "6E", "6F", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "7A", "7B", "7C", "7D", "7E", "7F", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "8A", "8B", "8C", "8D", "8E", "8F", "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "9A", "9B", "9C", "9D", "9E", "9F", "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "AA", "AB", "AC", "AD", "AE", "AF", "B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7", "B8", "B9", "BA", "BB", "BC", "BD", "BE", "BF", "C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7", "C8", "C9", "CA", "CB", "CC", "CD", "CE", "CF", "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7", "D8", "D9", "DA", "DB", "DC", "DD", "DE", "DF", "E0", "E1", "E2", "E3", "E4", "E5", "E6", "E7", "E8", "E9", "EA", "EB", "EC", "ED", "EE", "EF", "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7", "F8", "F9", "FA", "FB", "FC", "FD", "FE", "FF"];
LOOK_UP_TABLE[byte as usize]
}
}
mod character_panel {
use std::{borrow::Cow, mem};
use ratatui::{style::{Color, Style, Stylize}, text::Span};
use crate::{app::App, cardinality::HasCardinality, cursor::InCursor, custom_greys::CustomGreys, empty_span::empty_span};
impl App {
pub fn render_character_panel(
&self,
address: usize,
bytes: &[u8]
) -> impl Iterator<Item=Span<'static>> {
bytes
.iter()
.copied()
.zip(address..)
.map(|(byte, address)| self.render_character_at(address, byte))
}
fn render_character_at(
&self,
address: usize,
byte: u8
) -> Span<'static> {
const SPAN_FOR_BYTE: [Span; u8::CARDINALITY] = create_character_lookup_table();
let span = SPAN_FOR_BYTE[byte as usize].clone();
match self.cursor.contains(address) {
Some(InCursor::Head) => span.bg(Color::select_grey()),
Some(InCursor::Rest) => span.on_dark_gray(),
None => span,
}
}
}
const fn create_character_lookup_table() -> [Span<'static>; u8::CARDINALITY] {
let mut result = [const { empty_span() }; u8::CARDINALITY];
let mut index = 0;
while index < u8::CARDINALITY {
result[index].style = style_for_character(index as u8);
mem::forget(mem::replace(
&mut result[index].content,
content_for_character(index as u8)
));
index += 1;
}
result
}
const fn style_for_character(byte: u8) -> Style {
Style::new().fg(fg_for_character(byte))
}
const fn fg_for_character(byte: u8) -> Color {
match byte {
b'\0' => Color::Rgb(0xA0, 0xA0, 0xA0), // grey
b'\t' | b'\n' | b'\r' | b' ' => Color::Red,
_ if byte.is_ascii_graphic() => Color::Red,
_ if byte.is_ascii() => Color::Green,
0xFF => Color::White,
_ => Color::Yellow,
}
}
const fn content_for_character(byte: u8) -> Cow<'static, str> {
Cow::Borrowed(character_for_byte(byte))
}
const fn character_for_byte(byte: u8) -> &'static str {
const LOOK_UP_TABLE: [&str; u8::CARDINALITY] = ["⋄", "•", "•", "•", "•", "•", "•", "•", "•", "→", "⏎", "•", "•", "␍", "•", "•", "•", "•", "•", "•", "•", "•", "•", "•", "•", "•", "•", "•", "•", "•", "•", "•", " ", "!", "\"", "#", "$", "%", "&", "'", "(", ")", "*", "+", ",", "-", ".", "/", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", ":", ";", "<", "=", ">", "?", "@", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "[", "\\", "]", "^", "_", "`", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "{", "|", "}", "~", "•", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "×", "╳"];
LOOK_UP_TABLE[byte as usize]
}
}
mod status_line {
use crate::{app::App, custom_greys::CustomGreys};
use ratatui::{style::{Color, Stylize}, text::{Line, Span, Text}};
impl App {
pub fn render_status_line(&self) -> Text<'_> {
Text::from(
Line::from_iter([
self.render_mode(),
" ".into(),
self.render_file_name(),
self.modified_indicator(),
" ".into(),
self.alert_message.clone()
])
)
.bg(Color::ui_grey())
}
fn render_mode(&self) -> Span<'static> {
Span::from(self.mode.label())
.black()
.bg(self.mode.color())
}
fn render_file_name(&self) -> Span<'_> {
Span::from(&self.file_name)
}
fn modified_indicator(&self) -> Span<'static> {
if self.has_unsaved_changes() {
" [+]".into()
} else {
"".into()
}
}
}
}
mod extra_statuses {
use crate::app::App;
use ratatui::text::Line;
impl App {
pub fn render_extra_statuses(&self) -> Line<'_> {
let partial_action = self.partial_action
.as_ref()
.map_or("", |partial_action| partial_action.label());
if self.contents.is_empty() {
format!("{partial_action} ").into()
} else {
#[allow(clippy::cast_precision_loss)]
let percentage = self.cursor.head as f64 / self.max_contents_index() as f64 * 100.0;
format!("{partial_action} {percentage:.0}% ").into()
}
}
fn render(self, area: Rect, buf: &mut ratatui::buffer::Buffer) {
self.current_buffer().render(area, buf);
}
}