mirror of https://github.com/helix-editor/helix
Initial import.
Blaž Hrastnik
5 years ago
commit
240e5f4e3d
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|
||||
- undoes transactions
|
||||
- invert changes (generates a revert)
|
||||
(collab mode)
|
||||
gutter (line numbers, diagnostic marker, etc) -> ties into UI components
|
||||
rangeset/span -> mappable over changes (can be a marker primitive?)
|
||||
syntax (treesitter)
|
||||
- indentation strategies
|
||||
fold
|
||||
selections (select mode/multiselect)
|
||||
matchbrackets
|
||||
closebrackets
|
||||
special-chars (shows dots etc for specials)
|
||||
panel (for UI: file pickers, search dialogs, etc)
|
||||
tooltip (for UI)
|
||||
search (regex? pcre)
|
||||
lint (async linters)
|
||||
lsp
|
||||
highlight (?)
|
||||
stream-syntax
|
||||
autocomplete
|
||||
comment (gc, etc for auto commenting)
|
||||
snippets
|
||||
|
||||
terminal mode?
|
||||
|
||||
plugins can contain more commands/ui abstractions to use elsewhere
|
||||
|
||||
languageData as presets for each language (syntax, indent, comment, etc)
|
||||
|
||||
TODO: determine rust vs script portions
|
||||
|
||||
vim stuff:
|
||||
motions/operators/text objects
|
||||
full visual mode
|
||||
macros
|
||||
jump lists
|
||||
marks
|
||||
yank/paste
|
||||
conceal for markdown markers, etc
|
||||
|
||||
|
||||
---
|
||||
|
||||
codemirror uses offsets exclusively with Line being computed when necessary
|
||||
(with start/end extents)
|
||||
@ -0,0 +1,2 @@
|
||||
/target
|
||||
Cargo.lock
|
||||
@ -0,0 +1,11 @@
|
||||
[package]
|
||||
name = "helix-core"
|
||||
version = "0.1.0"
|
||||
authors = ["Blaž Hrastnik <blaz@mxxn.io>"]
|
||||
edition = "2018"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
ropey = "1.1.0"
|
||||
# slab = "0.4.2"
|
||||
@ -0,0 +1,5 @@
|
||||
mod position;
|
||||
mod range;
|
||||
|
||||
use position::Position;
|
||||
use range::Range;
|
||||
@ -0,0 +1,27 @@
|
||||
/// Represents a single point in a text buffer. Zero indexed.
|
||||
#[derive(Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
|
||||
pub struct Position {
|
||||
pub row: usize,
|
||||
pub col: usize,
|
||||
}
|
||||
|
||||
impl Position {
|
||||
pub fn new(row: usize, col: usize) -> Self {
|
||||
Self { row, col }
|
||||
}
|
||||
|
||||
pub fn is_zero(self) -> bool {
|
||||
self.row == 0 && self.col == 0
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod test {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_ordering() {
|
||||
// (0, 5) is less than (1, 0 w v f)
|
||||
assert!(Position::new(0, 5) < Position::new(1, 0));
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,9 @@
|
||||
use crate::Position;
|
||||
|
||||
#[derive(Clone, Copy, PartialEq, Eq)]
|
||||
pub struct Range {
|
||||
pub start: Position,
|
||||
pub end: Position,
|
||||
}
|
||||
|
||||
// range traversal iters
|
||||
@ -0,0 +1 @@
|
||||
/target
|
||||
@ -0,0 +1,19 @@
|
||||
[package]
|
||||
name = "helix-term"
|
||||
version = "0.1.0"
|
||||
authors = ["Blaž Hrastnik <blaz@mxxn.io>"]
|
||||
edition = "2018"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[[bin]]
|
||||
name = "hx"
|
||||
path = "src/main.rs"
|
||||
|
||||
# [[bin]]
|
||||
# name = "line"
|
||||
# path = "src/line.rs"
|
||||
|
||||
[dependencies]
|
||||
termwiz = { git = "https://github.com/wez/wezterm", features = ["widgets"] }
|
||||
anyhow = "1.0.31"
|
||||
@ -0,0 +1,7 @@
|
||||
|
||||
window -> buffer -> text
|
||||
\-> contains "view", a viewport into the buffer
|
||||
|
||||
view
|
||||
\-> selections etc
|
||||
-> cursor
|
||||
@ -0,0 +1,111 @@
|
||||
use termwiz::cell::AttributeChange;
|
||||
use termwiz::color::{AnsiColor, ColorAttribute, RgbColor};
|
||||
use termwiz::lineedit::*;
|
||||
|
||||
#[derive(Default)]
|
||||
struct Host {
|
||||
history: BasicHistory,
|
||||
}
|
||||
|
||||
impl LineEditorHost for Host {
|
||||
// Render the prompt with a darkslateblue background color if
|
||||
// the terminal supports true color, otherwise render it with
|
||||
// a navy blue ansi color.
|
||||
fn render_prompt(&self, prompt: &str) -> Vec<OutputElement> {
|
||||
vec![
|
||||
OutputElement::Attribute(AttributeChange::Background(
|
||||
ColorAttribute::TrueColorWithPaletteFallback(
|
||||
RgbColor::from_named("darkslateblue").unwrap(),
|
||||
AnsiColor::Navy.into(),
|
||||
),
|
||||
)),
|
||||
OutputElement::Text(prompt.to_owned()),
|
||||
]
|
||||
}
|
||||
|
||||
fn history(&mut self) -> &mut dyn History {
|
||||
&mut self.history
|
||||
}
|
||||
|
||||
/// Demo of the completion API for words starting with "h" or "he"
|
||||
fn complete(&self, line: &str, cursor_position: usize) -> Vec<CompletionCandidate> {
|
||||
let mut candidates = vec![];
|
||||
if let Some((range, word)) = word_at_cursor(line, cursor_position) {
|
||||
let words = &["hello", "help", "he-man"];
|
||||
|
||||
for w in words {
|
||||
if w.starts_with(word) {
|
||||
candidates.push(CompletionCandidate {
|
||||
range: range.clone(),
|
||||
text: w.to_string(),
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
candidates
|
||||
}
|
||||
}
|
||||
|
||||
/// This is a conceptually simple function that computes the bounds
|
||||
/// of the whitespace delimited word at the specified cursor position
|
||||
/// in the supplied line string.
|
||||
/// It returns the range and the corresponding slice out of the line.
|
||||
/// This function is sufficient for example purposes; in a real application
|
||||
/// the equivalent function would need to be aware of quoting and other
|
||||
/// application specific context.
|
||||
fn word_at_cursor(line: &str, cursor_position: usize) -> Option<(std::ops::Range<usize>, &str)> {
|
||||
let char_indices: Vec<(usize, char)> = line.char_indices().collect();
|
||||
if char_indices.is_empty() {
|
||||
return None;
|
||||
}
|
||||
let char_position = char_indices
|
||||
.iter()
|
||||
.position(|(idx, _)| *idx == cursor_position)
|
||||
.unwrap_or(char_indices.len());
|
||||
|
||||
// Look back until we find whitespace
|
||||
let mut start_position = char_position;
|
||||
while start_position > 0
|
||||
&& start_position <= char_indices.len()
|
||||
&& !char_indices[start_position - 1].1.is_whitespace()
|
||||
{
|
||||
start_position -= 1;
|
||||
}
|
||||
|
||||
// Look forwards until we find whitespace
|
||||
let mut end_position = char_position;
|
||||
while end_position < char_indices.len() && !char_indices[end_position].1.is_whitespace() {
|
||||
end_position += 1;
|
||||
}
|
||||
|
||||
if end_position > start_position {
|
||||
let range = char_indices[start_position].0
|
||||
..char_indices
|
||||
.get(end_position)
|
||||
.map(|c| c.0 + 1)
|
||||
.unwrap_or(line.len());
|
||||
Some((range.clone(), &line[range]))
|
||||
} else {
|
||||
None
|
||||
}
|
||||
}
|
||||
|
||||
fn main() -> anyhow::Result<()> {
|
||||
println!("Type `exit` to quit this example, or start a word with `h` and press Tab.");
|
||||
let mut terminal = line_editor_terminal()?;
|
||||
let mut editor = LineEditor::new(&mut terminal);
|
||||
|
||||
let mut host = Host::default();
|
||||
loop {
|
||||
if let Some(line) = editor.read_line(&mut host)? {
|
||||
println!("read line: {:?}", line);
|
||||
if line == "exit" {
|
||||
break;
|
||||
}
|
||||
|
||||
host.history().add(&line);
|
||||
}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
@ -0,0 +1,227 @@
|
||||
//! This example shows how to make a basic widget that accumulates
|
||||
//! text input and renders it to the screen
|
||||
#![allow(unused)]
|
||||
use anyhow::Error;
|
||||
use termwiz::caps::Capabilities;
|
||||
use termwiz::cell::AttributeChange;
|
||||
use termwiz::color::{AnsiColor, ColorAttribute, RgbColor};
|
||||
use termwiz::input::*;
|
||||
use termwiz::surface::Change;
|
||||
use termwiz::terminal::buffered::BufferedTerminal;
|
||||
use termwiz::terminal::{new_terminal, Terminal};
|
||||
use termwiz::widgets::*;
|
||||
|
||||
/// This is a widget for our application
|
||||
struct MainScreen {}
|
||||
|
||||
impl MainScreen {
|
||||
pub fn new() -> Self {
|
||||
Self {}
|
||||
}
|
||||
}
|
||||
|
||||
impl Widget for MainScreen {
|
||||
fn process_event(&mut self, event: &WidgetEvent, _args: &mut UpdateArgs) -> bool {
|
||||
true // handled it all
|
||||
}
|
||||
|
||||
/// Draw ourselves into the surface provided by RenderArgs
|
||||
fn render(&mut self, args: &mut RenderArgs) {
|
||||
// args.surface.add_change(Change::ClearScreen(
|
||||
// ColorAttribute::TrueColorWithPaletteFallback(
|
||||
// RgbColor::new(0x31, 0x1B, 0x92),
|
||||
// AnsiColor::Black.into(),
|
||||
// ),
|
||||
// ));
|
||||
// args.surface
|
||||
// .add_change(Change::Attribute(AttributeChange::Foreground(
|
||||
// ColorAttribute::TrueColorWithPaletteFallback(
|
||||
// RgbColor::new(0xB3, 0x88, 0xFF),
|
||||
// AnsiColor::Purple.into(),
|
||||
// ),
|
||||
// )));
|
||||
}
|
||||
|
||||
fn get_size_constraints(&self) -> layout::Constraints {
|
||||
let mut constraints = layout::Constraints::default();
|
||||
constraints.child_orientation = layout::ChildOrientation::Vertical;
|
||||
constraints
|
||||
}
|
||||
}
|
||||
|
||||
struct Buffer<'a> {
|
||||
/// Holds the input text that we wish the widget to display
|
||||
text: &'a mut String,
|
||||
}
|
||||
|
||||
impl<'a> Buffer<'a> {
|
||||
/// Initialize the widget with the input text
|
||||
pub fn new(text: &'a mut String) -> Self {
|
||||
Self { text }
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a> Widget for Buffer<'a> {
|
||||
fn process_event(&mut self, event: &WidgetEvent, _args: &mut UpdateArgs) -> bool {
|
||||
match event {
|
||||
WidgetEvent::Input(InputEvent::Key(KeyEvent {
|
||||
key: KeyCode::Char(c),
|
||||
..
|
||||
})) => self.text.push(*c),
|
||||
WidgetEvent::Input(InputEvent::Key(KeyEvent {
|
||||
key: KeyCode::Enter,
|
||||
..
|
||||
})) => {
|
||||
self.text.push_str("\r\n");
|
||||
}
|
||||
WidgetEvent::Input(InputEvent::Paste(s)) => {
|
||||
self.text.push_str(&s);
|
||||
}
|
||||
_ => {}
|
||||
}
|
||||
|
||||
true // handled it all
|
||||
}
|
||||
|
||||
/// Draw ourselves into the surface provided by RenderArgs
|
||||
fn render(&mut self, args: &mut RenderArgs) {
|
||||
args.surface
|
||||
.add_change(Change::ClearScreen(ColorAttribute::Default));
|
||||
|
||||
// args.surface
|
||||
// .add_change(Change::Attribute(AttributeChange::Foreground(
|
||||
// ColorAttribute::TrueColorWithPaletteFallback(
|
||||
// RgbColor::new(0x11, 0x00, 0xFF),
|
||||
// AnsiColor::Purple.into(),
|
||||
// ),
|
||||
// )));
|
||||
let dims = args.surface.dimensions();
|
||||
args.surface
|
||||
.add_change(format!("🤷 surface size is {:?}\r\n", dims));
|
||||
args.surface.add_change(self.text.clone());
|
||||
|
||||
// Place the cursor at the end of the text.
|
||||
// A more advanced text editing widget would manage the
|
||||
// cursor position differently.
|
||||
*args.cursor = CursorShapeAndPosition {
|
||||
coords: args.surface.cursor_position().into(),
|
||||
shape: termwiz::surface::CursorShape::SteadyBar,
|
||||
..Default::default()
|
||||
};
|
||||
}
|
||||
|
||||
fn get_size_constraints(&self) -> layout::Constraints {
|
||||
let mut c = layout::Constraints::default();
|
||||
c.set_valign(layout::VerticalAlignment::Top);
|
||||
c
|
||||
}
|
||||
}
|
||||
|
||||
struct StatusLine {}
|
||||
|
||||
impl StatusLine {
|
||||
pub fn new() -> Self {
|
||||
StatusLine {}
|
||||
}
|
||||
}
|
||||
impl Widget for StatusLine {
|
||||
fn process_event(&mut self, event: &WidgetEvent, _args: &mut UpdateArgs) -> bool {
|
||||
true
|
||||
}
|
||||
|
||||
fn render(&mut self, args: &mut RenderArgs) {
|
||||
args.surface.add_change(Change::ClearScreen(
|
||||
ColorAttribute::TrueColorWithPaletteFallback(
|
||||
RgbColor::new(0xFF, 0xFF, 0xFF),
|
||||
AnsiColor::Black.into(),
|
||||
),
|
||||
));
|
||||
args.surface
|
||||
.add_change(Change::Attribute(AttributeChange::Foreground(
|
||||
ColorAttribute::TrueColorWithPaletteFallback(
|
||||
RgbColor::new(0x00, 0x00, 0x00),
|
||||
AnsiColor::Black.into(),
|
||||
),
|
||||
)));
|
||||
|
||||
args.surface.add_change(" helix");
|
||||
}
|
||||
|
||||
fn get_size_constraints(&self) -> layout::Constraints {
|
||||
*layout::Constraints::default()
|
||||
.set_fixed_height(1)
|
||||
.set_valign(layout::VerticalAlignment::Bottom)
|
||||
}
|
||||
}
|
||||
|
||||
fn main() -> Result<(), Error> {
|
||||
// Start with an empty string; typing into the app will
|
||||
// update this string.
|
||||
let mut typed_text = String::new();
|
||||
|
||||
{
|
||||
// Create a terminal and put it into full screen raw mode
|
||||
let caps = Capabilities::new_from_env()?;
|
||||
let mut buf = BufferedTerminal::new(new_terminal(caps)?)?;
|
||||
buf.terminal().enter_alternate_screen()?;
|
||||
buf.terminal().set_raw_mode()?;
|
||||
|
||||
// Set up the UI
|
||||
let mut ui = Ui::new();
|
||||
|
||||
let root_id = ui.set_root(MainScreen::new());
|
||||
let buffer_id = ui.add_child(root_id, Buffer::new(&mut typed_text));
|
||||
// let root_id = ui.set_root(Buffer::new(&mut typed_text));
|
||||
ui.add_child(root_id, StatusLine::new());
|
||||
ui.set_focus(buffer_id);
|
||||
|
||||
loop {
|
||||
ui.process_event_queue()?;
|
||||
|
||||
// After updating and processing all of the widgets, compose them
|
||||
// and render them to the screen.
|
||||
if ui.render_to_screen(&mut buf)? {
|
||||
// We have more events to process immediately; don't block waiting
|
||||
// for input below, but jump to the top of the loop to re-run the
|
||||
// updates.
|
||||
continue;
|
||||
}
|
||||
// Compute an optimized delta to apply to the terminal and display it
|
||||
buf.flush()?;
|
||||
|
||||
// Wait for user input
|
||||
match buf.terminal().poll_input(None) {
|
||||
Ok(Some(InputEvent::Resized { rows, cols })) => {
|
||||
// FIXME: this is working around a bug where we don't realize
|
||||
// that we should redraw everything on resize in BufferedTerminal.
|
||||
buf.add_change(Change::ClearScreen(Default::default()));
|
||||
buf.resize(cols, rows);
|
||||
}
|
||||
Ok(Some(input)) => match input {
|
||||
InputEvent::Key(KeyEvent {
|
||||
key: KeyCode::Escape,
|
||||
..
|
||||
}) => {
|
||||
// Quit the app when escape is pressed
|
||||
break;
|
||||
}
|
||||
input @ _ => {
|
||||
// Feed input into the Ui
|
||||
ui.queue_event(WidgetEvent::Input(input));
|
||||
}
|
||||
},
|
||||
Ok(None) => {}
|
||||
Err(e) => {
|
||||
print!("{:?}\r\n", e);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// After we've stopped the full screen raw terminal,
|
||||
// print out the final edited value of the input text.
|
||||
println!("The text you entered: {}", typed_text);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
Loading…
Reference in New Issue