git.iko.soy/helix
on master help sign in
Initial import.
240e5f4Blaž Hrastnik
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compare with master
unifiedsplit
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Cargo.tomlnew file+5
@@ -0,0 +1,5 @@
1+[workspace]
2+members = [
3+ "helix-core",
4+ "helix-term",
5+]
README.mdnew file+80
@@ -0,0 +1,80 @@
1+- server-client architecture via gRPC, UI separate from core
2+- multi cursor based editing and slicing
3+- WASM based plugins (builtin LSP & fuzzy file finder)
4+- piece table-based tree structure for changes
5+
6+
7+Structure similar to codemirror:
8+
9+text (ropes)
10+- column utils, stuff like tab aware (row, col) -> char pos translation
11+- word/grapheme/code point utils and iterators
12+state
13+- transactions
14+ - changes
15+ - annotations (time changed etc)
16+ - state effects
17+ - additional editor state as facets
18+- snapshots as an async view into current state
19+- selections { anchor (nonmoving), head (moving) from/to } -> SelectionSet with a primary
20+ - cursor is just a single range selection
21+- markers
22+ track a position inside text that synchronizes with edits
23+{ doc, selection, update(), splice, changes(), facets, tabSize, identUnit, lineSeparator, changeFilter/transactionFilter to modify stuff before }
24+view (actual UI)
25+- renders via termwiz
26+- viewport(Lines) -> what's actually visible
27+- extend the view via Decorations (inline styling) or Components (UI)
28+ - mark / wieget / line / replace decoration
29+commands (transform state)
30+- movement
31+- selection extension
32+- deletion
33+- indentation
34+keymap (maps keys to commands)
35+history (undo tree via immutable ropes)
36+- undoes transactions
37+- invert changes (generates a revert)
38+(collab mode)
39+gutter (line numbers, diagnostic marker, etc) -> ties into UI components
40+rangeset/span -> mappable over changes (can be a marker primitive?)
41+syntax (treesitter)
42+- indentation strategies
43+fold
44+selections (select mode/multiselect)
45+matchbrackets
46+closebrackets
47+special-chars (shows dots etc for specials)
48+panel (for UI: file pickers, search dialogs, etc)
49+tooltip (for UI)
50+search (regex? pcre)
51+lint (async linters)
52+lsp
53+highlight (?)
54+stream-syntax
55+autocomplete
56+comment (gc, etc for auto commenting)
57+snippets
58+
59+terminal mode?
60+
61+plugins can contain more commands/ui abstractions to use elsewhere
62+
63+languageData as presets for each language (syntax, indent, comment, etc)
64+
65+TODO: determine rust vs script portions
66+
67+vim stuff:
68+motions/operators/text objects
69+full visual mode
70+macros
71+jump lists
72+marks
73+yank/paste
74+conceal for markdown markers, etc
75+
76+
77+---
78+
79+codemirror uses offsets exclusively with Line being computed when necessary
80+(with start/end extents)
helix-core/.gitignorenew file+2
@@ -0,0 +1,2 @@
1+/target
2+Cargo.lock
helix-core/Cargo.tomlnew file+11
@@ -0,0 +1,11 @@
1+[package]
2+name = "helix-core"
3+version = "0.1.0"
4+authors = ["Blaž Hrastnik <blaz@mxxn.io>"]
5+edition = "2018"
6+
7+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
8+
9+[dependencies]
10+ropey = "1.1.0"
11+# slab = "0.4.2"
helix-core/src/lib.rsnew file+5
@@ -0,0 +1,5 @@
1+mod position;
2+mod range;
3+
4+use position::Position;
5+use range::Range;
helix-core/src/position.rsnew file+27
@@ -0,0 +1,27 @@
1+/// Represents a single point in a text buffer. Zero indexed.
2+#[derive(Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
3+pub struct Position {
4+ pub row: usize,
5+ pub col: usize,
6+}
7+
8+impl Position {
9+ pub fn new(row: usize, col: usize) -> Self {
10+ Self { row, col }
11+ }
12+
13+ pub fn is_zero(self) -> bool {
14+ self.row == 0 && self.col == 0
15+ }
16+}
17+
18+#[cfg(test)]
19+mod test {
20+ use super::*;
21+
22+ #[test]
23+ fn test_ordering() {
24+ // (0, 5) is less than (1, 0 w v f)
25+ assert!(Position::new(0, 5) < Position::new(1, 0));
26+ }
27+}
helix-core/src/range.rsnew file+9
@@ -0,0 +1,9 @@
1+use crate::Position;
2+
3+#[derive(Clone, Copy, PartialEq, Eq)]
4+pub struct Range {
5+ pub start: Position,
6+ pub end: Position,
7+}
8+
9+// range traversal iters
helix-term/.gitignorenew file+1
@@ -0,0 +1 @@
1+/target
helix-term/Cargo.tomlnew file+19
@@ -0,0 +1,19 @@
1+[package]
2+name = "helix-term"
3+version = "0.1.0"
4+authors = ["Blaž Hrastnik <blaz@mxxn.io>"]
5+edition = "2018"
6+
7+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
8+
9+[[bin]]
10+name = "hx"
11+path = "src/main.rs"
12+
13+# [[bin]]
14+# name = "line"
15+# path = "src/line.rs"
16+
17+[dependencies]
18+termwiz = { git = "https://github.com/wez/wezterm", features = ["widgets"] }
19+anyhow = "1.0.31"
helix-term/README.mdnew file+7
@@ -0,0 +1,7 @@
1+
2+window -> buffer -> text
3+\-> contains "view", a viewport into the buffer
4+
5+view
6+\-> selections etc
7+-> cursor
helix-term/src/line.rsnew file+111
@@ -0,0 +1,111 @@
1+use termwiz::cell::AttributeChange;
2+use termwiz::color::{AnsiColor, ColorAttribute, RgbColor};
3+use termwiz::lineedit::*;
4+
5+#[derive(Default)]
6+struct Host {
7+ history: BasicHistory,
8+}
9+
10+impl LineEditorHost for Host {
11+ // Render the prompt with a darkslateblue background color if
12+ // the terminal supports true color, otherwise render it with
13+ // a navy blue ansi color.
14+ fn render_prompt(&self, prompt: &str) -> Vec<OutputElement> {
15+ vec![
16+ OutputElement::Attribute(AttributeChange::Background(
17+ ColorAttribute::TrueColorWithPaletteFallback(
18+ RgbColor::from_named("darkslateblue").unwrap(),
19+ AnsiColor::Navy.into(),
20+ ),
21+ )),
22+ OutputElement::Text(prompt.to_owned()),
23+ ]
24+ }
25+
26+ fn history(&mut self) -> &mut dyn History {
27+ &mut self.history
28+ }
29+
30+ /// Demo of the completion API for words starting with "h" or "he"
31+ fn complete(&self, line: &str, cursor_position: usize) -> Vec<CompletionCandidate> {
32+ let mut candidates = vec![];
33+ if let Some((range, word)) = word_at_cursor(line, cursor_position) {
34+ let words = &["hello", "help", "he-man"];
35+
36+ for w in words {
37+ if w.starts_with(word) {
38+ candidates.push(CompletionCandidate {
39+ range: range.clone(),
40+ text: w.to_string(),
41+ });
42+ }
43+ }
44+ }
45+ candidates
46+ }
47+}
48+
49+/// This is a conceptually simple function that computes the bounds
50+/// of the whitespace delimited word at the specified cursor position
51+/// in the supplied line string.
52+/// It returns the range and the corresponding slice out of the line.
53+/// This function is sufficient for example purposes; in a real application
54+/// the equivalent function would need to be aware of quoting and other
55+/// application specific context.
56+fn word_at_cursor(line: &str, cursor_position: usize) -> Option<(std::ops::Range<usize>, &str)> {
57+ let char_indices: Vec<(usize, char)> = line.char_indices().collect();
58+ if char_indices.is_empty() {
59+ return None;
60+ }
61+ let char_position = char_indices
62+ .iter()
63+ .position(|(idx, _)| *idx == cursor_position)
64+ .unwrap_or(char_indices.len());
65+
66+ // Look back until we find whitespace
67+ let mut start_position = char_position;
68+ while start_position > 0
69+ && start_position <= char_indices.len()
70+ && !char_indices[start_position - 1].1.is_whitespace()
71+ {
72+ start_position -= 1;
73+ }
74+
75+ // Look forwards until we find whitespace
76+ let mut end_position = char_position;
77+ while end_position < char_indices.len() && !char_indices[end_position].1.is_whitespace() {
78+ end_position += 1;
79+ }
80+
81+ if end_position > start_position {
82+ let range = char_indices[start_position].0
83+ ..char_indices
84+ .get(end_position)
85+ .map(|c| c.0 + 1)
86+ .unwrap_or(line.len());
87+ Some((range.clone(), &line[range]))
88+ } else {
89+ None
90+ }
91+}
92+
93+fn main() -> anyhow::Result<()> {
94+ println!("Type `exit` to quit this example, or start a word with `h` and press Tab.");
95+ let mut terminal = line_editor_terminal()?;
96+ let mut editor = LineEditor::new(&mut terminal);
97+
98+ let mut host = Host::default();
99+ loop {
100+ if let Some(line) = editor.read_line(&mut host)? {
101+ println!("read line: {:?}", line);
102+ if line == "exit" {
103+ break;
104+ }
105+
106+ host.history().add(&line);
107+ }
108+ }
109+
110+ Ok(())
111+}
helix-term/src/main.rsnew file+227
@@ -0,0 +1,227 @@
1+//! This example shows how to make a basic widget that accumulates
2+//! text input and renders it to the screen
3+#![allow(unused)]
4+use anyhow::Error;
5+use termwiz::caps::Capabilities;
6+use termwiz::cell::AttributeChange;
7+use termwiz::color::{AnsiColor, ColorAttribute, RgbColor};
8+use termwiz::input::*;
9+use termwiz::surface::Change;
10+use termwiz::terminal::buffered::BufferedTerminal;
11+use termwiz::terminal::{new_terminal, Terminal};
12+use termwiz::widgets::*;
13+
14+/// This is a widget for our application
15+struct MainScreen {}
16+
17+impl MainScreen {
18+ pub fn new() -> Self {
19+ Self {}
20+ }
21+}
22+
23+impl Widget for MainScreen {
24+ fn process_event(&mut self, event: &WidgetEvent, _args: &mut UpdateArgs) -> bool {
25+ true // handled it all
26+ }
27+
28+ /// Draw ourselves into the surface provided by RenderArgs
29+ fn render(&mut self, args: &mut RenderArgs) {
30+ // args.surface.add_change(Change::ClearScreen(
31+ // ColorAttribute::TrueColorWithPaletteFallback(
32+ // RgbColor::new(0x31, 0x1B, 0x92),
33+ // AnsiColor::Black.into(),
34+ // ),
35+ // ));
36+ // args.surface
37+ // .add_change(Change::Attribute(AttributeChange::Foreground(
38+ // ColorAttribute::TrueColorWithPaletteFallback(
39+ // RgbColor::new(0xB3, 0x88, 0xFF),
40+ // AnsiColor::Purple.into(),
41+ // ),
42+ // )));
43+ }
44+
45+ fn get_size_constraints(&self) -> layout::Constraints {
46+ let mut constraints = layout::Constraints::default();
47+ constraints.child_orientation = layout::ChildOrientation::Vertical;
48+ constraints
49+ }
50+}
51+
52+struct Buffer<'a> {
53+ /// Holds the input text that we wish the widget to display
54+ text: &'a mut String,
55+}
56+
57+impl<'a> Buffer<'a> {
58+ /// Initialize the widget with the input text
59+ pub fn new(text: &'a mut String) -> Self {
60+ Self { text }
61+ }
62+}
63+
64+impl<'a> Widget for Buffer<'a> {
65+ fn process_event(&mut self, event: &WidgetEvent, _args: &mut UpdateArgs) -> bool {
66+ match event {
67+ WidgetEvent::Input(InputEvent::Key(KeyEvent {
68+ key: KeyCode::Char(c),
69+ ..
70+ })) => self.text.push(*c),
71+ WidgetEvent::Input(InputEvent::Key(KeyEvent {
72+ key: KeyCode::Enter,
73+ ..
74+ })) => {
75+ self.text.push_str("\r\n");
76+ }
77+ WidgetEvent::Input(InputEvent::Paste(s)) => {
78+ self.text.push_str(&s);
79+ }
80+ _ => {}
81+ }
82+
83+ true // handled it all
84+ }
85+
86+ /// Draw ourselves into the surface provided by RenderArgs
87+ fn render(&mut self, args: &mut RenderArgs) {
88+ args.surface
89+ .add_change(Change::ClearScreen(ColorAttribute::Default));
90+
91+ // args.surface
92+ // .add_change(Change::Attribute(AttributeChange::Foreground(
93+ // ColorAttribute::TrueColorWithPaletteFallback(
94+ // RgbColor::new(0x11, 0x00, 0xFF),
95+ // AnsiColor::Purple.into(),
96+ // ),
97+ // )));
98+ let dims = args.surface.dimensions();
99+ args.surface
100+ .add_change(format!("🤷 surface size is {:?}\r\n", dims));
101+ args.surface.add_change(self.text.clone());
102+
103+ // Place the cursor at the end of the text.
104+ // A more advanced text editing widget would manage the
105+ // cursor position differently.
106+ *args.cursor = CursorShapeAndPosition {
107+ coords: args.surface.cursor_position().into(),
108+ shape: termwiz::surface::CursorShape::SteadyBar,
109+ ..Default::default()
110+ };
111+ }
112+
113+ fn get_size_constraints(&self) -> layout::Constraints {
114+ let mut c = layout::Constraints::default();
115+ c.set_valign(layout::VerticalAlignment::Top);
116+ c
117+ }
118+}
119+
120+struct StatusLine {}
121+
122+impl StatusLine {
123+ pub fn new() -> Self {
124+ StatusLine {}
125+ }
126+}
127+impl Widget for StatusLine {
128+ fn process_event(&mut self, event: &WidgetEvent, _args: &mut UpdateArgs) -> bool {
129+ true
130+ }
131+
132+ fn render(&mut self, args: &mut RenderArgs) {
133+ args.surface.add_change(Change::ClearScreen(
134+ ColorAttribute::TrueColorWithPaletteFallback(
135+ RgbColor::new(0xFF, 0xFF, 0xFF),
136+ AnsiColor::Black.into(),
137+ ),
138+ ));
139+ args.surface
140+ .add_change(Change::Attribute(AttributeChange::Foreground(
141+ ColorAttribute::TrueColorWithPaletteFallback(
142+ RgbColor::new(0x00, 0x00, 0x00),
143+ AnsiColor::Black.into(),
144+ ),
145+ )));
146+
147+ args.surface.add_change(" helix");
148+ }
149+
150+ fn get_size_constraints(&self) -> layout::Constraints {
151+ *layout::Constraints::default()
152+ .set_fixed_height(1)
153+ .set_valign(layout::VerticalAlignment::Bottom)
154+ }
155+}
156+
157+fn main() -> Result<(), Error> {
158+ // Start with an empty string; typing into the app will
159+ // update this string.
160+ let mut typed_text = String::new();
161+
162+ {
163+ // Create a terminal and put it into full screen raw mode
164+ let caps = Capabilities::new_from_env()?;
165+ let mut buf = BufferedTerminal::new(new_terminal(caps)?)?;
166+ buf.terminal().enter_alternate_screen()?;
167+ buf.terminal().set_raw_mode()?;
168+
169+ // Set up the UI
170+ let mut ui = Ui::new();
171+
172+ let root_id = ui.set_root(MainScreen::new());
173+ let buffer_id = ui.add_child(root_id, Buffer::new(&mut typed_text));
174+ // let root_id = ui.set_root(Buffer::new(&mut typed_text));
175+ ui.add_child(root_id, StatusLine::new());
176+ ui.set_focus(buffer_id);
177+
178+ loop {
179+ ui.process_event_queue()?;
180+
181+ // After updating and processing all of the widgets, compose them
182+ // and render them to the screen.
183+ if ui.render_to_screen(&mut buf)? {
184+ // We have more events to process immediately; don't block waiting
185+ // for input below, but jump to the top of the loop to re-run the
186+ // updates.
187+ continue;
188+ }
189+ // Compute an optimized delta to apply to the terminal and display it
190+ buf.flush()?;
191+
192+ // Wait for user input
193+ match buf.terminal().poll_input(None) {
194+ Ok(Some(InputEvent::Resized { rows, cols })) => {
195+ // FIXME: this is working around a bug where we don't realize
196+ // that we should redraw everything on resize in BufferedTerminal.
197+ buf.add_change(Change::ClearScreen(Default::default()));
198+ buf.resize(cols, rows);
199+ }
200+ Ok(Some(input)) => match input {
201+ InputEvent::Key(KeyEvent {
202+ key: KeyCode::Escape,
203+ ..
204+ }) => {
205+ // Quit the app when escape is pressed
206+ break;
207+ }
208+ input @ _ => {
209+ // Feed input into the Ui
210+ ui.queue_event(WidgetEvent::Input(input));
211+ }
212+ },
213+ Ok(None) => {}
214+ Err(e) => {
215+ print!("{:?}\r\n", e);
216+ break;
217+ }
218+ }
219+ }
220+ }
221+
222+ // After we've stopped the full screen raw terminal,
223+ // print out the final edited value of the input text.
224+ println!("The text you entered: {}", typed_text);
225+
226+ Ok(())
227+}