diff options
author | Jan Hrastnik | 2020-12-13 11:30:36 +0000 |
---|---|---|
committer | GitHub | 2020-12-13 11:30:36 +0000 |
commit | b12a6dc8303bbc1b4b08a9abb4668741d154adbd (patch) | |
tree | 016aa433cf7c226341e9c3c3e74ea65060db1914 /helix-term | |
parent | b7a3e525ed7fed5ed79e8580df2e3496bd994419 (diff) | |
parent | 07801b60bccd0f084eae925e0290c24322de575f (diff) |
Merge pull request #6 from helix-editor/compositor
Compositor v2 rewrite
Diffstat (limited to 'helix-term')
-rw-r--r-- | helix-term/Cargo.toml | 1 | ||||
-rw-r--r-- | helix-term/src/application.rs | 579 | ||||
-rw-r--r-- | helix-term/src/commands.rs | 735 | ||||
-rw-r--r-- | helix-term/src/component.rs | 20 | ||||
-rw-r--r-- | helix-term/src/compositor.rs | 155 | ||||
-rw-r--r-- | helix-term/src/helix.log | 0 | ||||
-rw-r--r-- | helix-term/src/keymap.rs | 217 | ||||
-rw-r--r-- | helix-term/src/main.rs | 5 | ||||
-rw-r--r-- | helix-term/src/terminal.rs | 221 | ||||
-rw-r--r-- | helix-term/src/ui/editor.rs | 327 | ||||
-rw-r--r-- | helix-term/src/ui/mod.rs | 14 | ||||
-rw-r--r-- | helix-term/src/ui/prompt.rs | 217 |
12 files changed, 1954 insertions, 537 deletions
diff --git a/helix-term/Cargo.toml b/helix-term/Cargo.toml index c1560ee7..b8eea7c2 100644 --- a/helix-term/Cargo.toml +++ b/helix-term/Cargo.toml @@ -17,6 +17,7 @@ helix-view = { path = "../helix-view", features = ["term"]} helix-lsp = { path = "../helix-lsp"} anyhow = "1" +once_cell = "1.4" smol = "1" num_cpus = "1" diff --git a/helix-term/src/application.rs b/helix-term/src/application.rs index 141779ec..dc37612a 100644 --- a/helix-term/src/application.rs +++ b/helix-term/src/application.rs @@ -1,17 +1,13 @@ use clap::ArgMatches as Args; -use helix_core::{indent::TAB_WIDTH, syntax::HighlightEvent, Position, Range, State}; -use helix_view::{ - commands, - document::Mode, - keymap::{self, Keymaps}, - prompt::Prompt, - Document, Editor, Theme, View, -}; + +use helix_view::{document::Mode, Document, Editor, Theme, View}; + +use crate::compositor::Compositor; +use crate::ui; use log::{debug, info}; use std::{ - borrow::Cow, io::{self, stdout, Stdout, Write}, path::PathBuf, time::Duration, @@ -22,366 +18,44 @@ use smol::prelude::*; use anyhow::Error; use crossterm::{ - cursor, - event::{read, Event, EventStream, KeyCode, KeyEvent}, - execute, queue, - terminal::{self, disable_raw_mode, enable_raw_mode}, + event::{Event, EventStream}, + execute, terminal, }; -use tui::{ - backend::CrosstermBackend, - buffer::Buffer as Surface, - layout::Rect, - style::{Color, Modifier, Style}, -}; - -const OFFSET: u16 = 7; // 1 diagnostic + 5 linenr + 1 gutter - -type Terminal = tui::Terminal<CrosstermBackend<std::io::Stdout>>; +use tui::{backend::CrosstermBackend, layout::Rect}; -const BASE_WIDTH: u16 = 30; +type Terminal = crate::terminal::Terminal<CrosstermBackend<std::io::Stdout>>; -pub struct Application<'a> { +pub struct Application { + compositor: Compositor, editor: Editor, - prompt: Option<Prompt>, - terminal: Renderer, + terminal: Terminal, - keymap: Keymaps, - executor: &'a smol::Executor<'a>, + executor: &'static smol::Executor<'static>, language_server: helix_lsp::Client, } -struct Renderer { - size: (u16, u16), - terminal: Terminal, - surface: Surface, - cache: Surface, - text_color: Style, -} - -impl Renderer { - pub fn new() -> Result<Self, Error> { +impl Application { + pub fn new(mut args: Args, executor: &'static smol::Executor<'static>) -> Result<Self, Error> { let backend = CrosstermBackend::new(stdout()); let mut terminal = Terminal::new(backend)?; - let size = terminal::size().unwrap(); - let text_color: Style = Style::default().fg(Color::Rgb(219, 191, 239)); // lilac - - let area = Rect::new(0, 0, size.0, size.1); - - Ok(Self { - size, - terminal, - surface: Surface::empty(area), - cache: Surface::empty(area), - text_color, - }) - } - - pub fn resize(&mut self, width: u16, height: u16) { - self.size = (width, height); - let area = Rect::new(0, 0, width, height); - self.surface = Surface::empty(area); - self.cache = Surface::empty(area); - } - - pub fn render_view(&mut self, view: &mut View, viewport: Rect, theme: &Theme) { - self.render_buffer(view, viewport, theme); - self.render_statusline(view, theme); - } - - // TODO: ideally not &mut View but highlights require it because of cursor cache - pub fn render_buffer(&mut self, view: &mut View, viewport: Rect, theme: &Theme) { - let area = Rect::new(0, 0, self.size.0, self.size.1); - self.surface.reset(); // reset is faster than allocating new empty surface - - // clear with background color - self.surface.set_style(area, theme.get("ui.background")); - - // TODO: inefficient, should feed chunks.iter() to tree_sitter.parse_with(|offset, pos|) - let source_code = view.doc.text().to_string(); - - let last_line = view.last_line(); - - let range = { - // calculate viewport byte ranges - let start = view.doc.text().line_to_byte(view.first_line); - let end = view.doc.text().line_to_byte(last_line) - + view.doc.text().line(last_line).len_bytes(); - - start..end - }; - - // TODO: range doesn't actually restrict source, just highlight range - // TODO: cache highlight results - // TODO: only recalculate when state.doc is actually modified - let highlights: Vec<_> = match view.doc.syntax.as_mut() { - Some(syntax) => { - syntax - .highlight_iter(source_code.as_bytes(), Some(range), None, |_| None) - .unwrap() - .collect() // TODO: we collect here to avoid double borrow, fix later - } - None => vec![Ok(HighlightEvent::Source { - start: range.start, - end: range.end, - })], - }; - let mut spans = Vec::new(); - let mut visual_x = 0; - let mut line = 0u16; - let visible_selections: Vec<Range> = view - .doc - .state - .selection() - .ranges() - .iter() - // TODO: limit selection to one in viewport - // .filter(|range| !range.is_empty()) // && range.overlaps(&Range::new(start, end + 1)) - .copied() - .collect(); - - 'outer: for event in highlights { - match event.unwrap() { - HighlightEvent::HighlightStart(span) => { - spans.push(span); - } - HighlightEvent::HighlightEnd => { - spans.pop(); - } - HighlightEvent::Source { start, end } => { - // TODO: filter out spans out of viewport for now.. - - let start = view.doc.text().byte_to_char(start); - let end = view.doc.text().byte_to_char(end); // <-- index 744, len 743 - - let text = view.doc.text().slice(start..end); - - use helix_core::graphemes::{grapheme_width, RopeGraphemes}; - - let style = match spans.first() { - Some(span) => theme.get(theme.scopes()[span.0].as_str()), - None => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender - }; - - // TODO: we could render the text to a surface, then cache that, that - // way if only the selection/cursor changes we can copy from cache - // and paint the new cursor. - - let mut char_index = start; - - // iterate over range char by char - for grapheme in RopeGraphemes::new(&text) { - // TODO: track current char_index - - if grapheme == "\n" { - visual_x = 0; - line += 1; - - // TODO: with proper iter this shouldn't be necessary - if line >= viewport.height { - break 'outer; - } - } else if grapheme == "\t" { - visual_x += (TAB_WIDTH as u16); - } else { - // Cow will prevent allocations if span contained in a single slice - // which should really be the majority case - let grapheme = Cow::from(grapheme); - let width = grapheme_width(&grapheme) as u16; - - // TODO: this should really happen as an after pass - let style = if visible_selections - .iter() - .any(|range| range.contains(char_index)) - { - // cedar - style.clone().bg(Color::Rgb(128, 47, 0)) - } else { - style - }; - - let style = if visible_selections - .iter() - .any(|range| range.head == char_index) - { - style.clone().bg(Color::Rgb(255, 255, 255)) - } else { - style - }; - - // ugh, improve with a traverse method - // or interleave highlight spans with selection and diagnostic spans - let style = if view.doc.diagnostics.iter().any(|diagnostic| { - diagnostic.range.0 <= char_index && diagnostic.range.1 > char_index - }) { - style.clone().add_modifier(Modifier::UNDERLINED) - } else { - style - }; - - // TODO: paint cursor heads except primary - - self.surface - .set_string(OFFSET + visual_x, line, grapheme, style); - - visual_x += width; - } - - char_index += 1; - } - } - } - } - - let style: Style = theme.get("ui.linenr"); - let warning: Style = theme.get("warning"); - let last_line = view.last_line(); - for (i, line) in (view.first_line..last_line).enumerate() { - if view.doc.diagnostics.iter().any(|d| d.line == line) { - self.surface.set_stringn(0, i as u16, "●", 1, warning); - } - - self.surface - .set_stringn(1, i as u16, format!("{:>5}", line + 1), 5, style); - } - } - - pub fn render_statusline(&mut self, view: &View, theme: &Theme) { - let mode = match view.doc.mode() { - Mode::Insert => "INS", - Mode::Normal => "NOR", - Mode::Goto => "GOTO", - }; - // statusline - self.surface.set_style( - Rect::new(0, self.size.1 - 2, self.size.0, 1), - theme.get("ui.statusline"), - ); - self.surface - .set_string(1, self.size.1 - 2, mode, self.text_color); - - self.surface.set_string( - self.size.0 - 10, - self.size.1 - 2, - format!("{}", view.doc.diagnostics.len()), - self.text_color, - ); - } - - pub fn render_prompt(&mut self, view: &View, prompt: &Prompt, theme: &Theme) { - // completion - if !prompt.completion.is_empty() { - // TODO: find out better way of clearing individual lines of the screen - let mut row = 0; - let mut col = 0; - let max_col = self.size.0 / BASE_WIDTH; - let col_height = ((prompt.completion.len() as u16 + max_col - 1) / max_col); - - for i in (3..col_height + 3) { - self.surface.set_string( - 0, - self.size.1 - i as u16, - " ".repeat(self.size.0 as usize), - self.text_color, - ); - } - self.surface.set_style( - Rect::new(0, self.size.1 - col_height - 2, self.size.0, col_height), - theme.get("ui.statusline"), - ); - for (i, command) in prompt.completion.iter().enumerate() { - let color = if prompt.completion_selection_index.is_some() - && i == prompt.completion_selection_index.unwrap() - { - Style::default().bg(Color::Rgb(104, 060, 232)) - } else { - self.text_color - }; - self.surface.set_stringn( - 1 + col * BASE_WIDTH, - self.size.1 - col_height - 2 + row, - &command, - BASE_WIDTH as usize - 1, - color, - ); - row += 1; - if row > col_height - 1 { - row = 0; - col += 1; - } - if col > max_col { - break; - } - } - } - // render buffer text - self.surface - .set_string(1, self.size.1 - 1, &prompt.prompt, self.text_color); - self.surface - .set_string(2, self.size.1 - 1, &prompt.line, self.text_color); - } - - pub fn draw(&mut self) { - use tui::backend::Backend; - // TODO: theres probably a better place for this - self.terminal - .backend_mut() - .draw(self.cache.diff(&self.surface).into_iter()); - // swap the buffer - std::mem::swap(&mut self.surface, &mut self.cache); - } - - pub fn render_cursor(&mut self, view: &View, prompt: Option<&Prompt>, viewport: Rect) { - let mut stdout = stdout(); - match view.doc.mode() { - Mode::Insert => write!(stdout, "\x1B[6 q"), - mode => write!(stdout, "\x1B[2 q"), - }; - let pos = if let Some(prompt) = prompt { - Position::new(self.size.0 as usize, 2 + prompt.cursor) - } else { - if let Some(path) = view.doc.path() { - self.surface.set_string( - 6, - self.size.1 - 1, - path.to_string_lossy(), - self.text_color, - ); - } - - let cursor = view.doc.state.selection().cursor(); - - let mut pos = view - .screen_coords_at_pos(&view.doc.text().slice(..), cursor) - .expect("Cursor is out of bounds."); - pos.col += viewport.x as usize; - pos.row += viewport.y as usize; - pos - }; - - execute!(stdout, cursor::MoveTo(pos.col as u16, pos.row as u16)); - } -} - -impl<'a> Application<'a> { - pub fn new(mut args: Args, executor: &'a smol::Executor<'a>) -> Result<Self, Error> { - let terminal = Renderer::new()?; let mut editor = Editor::new(); + let size = terminal.size()?; if let Some(file) = args.values_of_t::<PathBuf>("files").unwrap().pop() { - editor.open(file, terminal.size)?; + editor.open(file, (size.width, size.height))?; } + let mut compositor = Compositor::new(); + compositor.push(Box::new(ui::EditorView::new())); + let language_server = helix_lsp::Client::start(&executor, "rust-analyzer", &[]); let mut app = Self { editor, terminal, - // TODO; move to state - prompt: None, + compositor, - // - keymap: keymap::default(), executor, language_server, }; @@ -390,27 +64,18 @@ impl<'a> Application<'a> { } fn render(&mut self) { - let viewport = Rect::new(OFFSET, 0, self.terminal.size.0, self.terminal.size.1 - 2); // - 2 for statusline and prompt - - // SAFETY: we cheat around the view_mut() borrow because it doesn't allow us to also borrow - // theme. Theme is immutable mutating view won't disrupt theme_ref. - let theme_ref = unsafe { &*(&self.editor.theme as *const Theme) }; - if let Some(view) = self.editor.view_mut() { - self.terminal.render_view(view, viewport, theme_ref); - if let Some(prompt) = &self.prompt { - if prompt.should_close { - self.prompt = None; - } else { - self.terminal.render_prompt(view, prompt, theme_ref); - } - } - } + let executor = &self.executor; + let editor = &mut self.editor; + let compositor = &self.compositor; - self.terminal.draw(); + let mut cx = crate::compositor::Context { editor, executor }; + let area = self.terminal.size().unwrap(); - // TODO: drop unwrap - self.terminal - .render_cursor(self.editor.view().unwrap(), self.prompt.as_ref(), viewport); + compositor.render(area, self.terminal.current_buffer_mut(), &mut cx); + let pos = compositor.cursor_position(area, &mut cx); + + self.terminal.draw(); + self.terminal.set_cursor(pos.col as u16, pos.row as u16); } pub async fn event_loop(&mut self) { @@ -418,10 +83,11 @@ impl<'a> Application<'a> { // initialize lsp self.language_server.initialize().await.unwrap(); - self.language_server - .text_document_did_open(&self.editor.view().unwrap().doc) - .await - .unwrap(); + // TODO: temp + // self.language_server + // .text_document_did_open(&cx.editor.view().unwrap().doc) + // .await + // .unwrap(); self.render(); @@ -433,7 +99,7 @@ impl<'a> Application<'a> { use futures_util::{select, FutureExt}; select! { event = reader.next().fuse() => { - self.handle_terminal_events(event).await + self.handle_terminal_events(event) } call = self.language_server.incoming.next().fuse() => { self.handle_language_server_message(call).await @@ -442,151 +108,28 @@ impl<'a> Application<'a> { } } - pub async fn handle_terminal_events( - &mut self, - event: Option<Result<Event, crossterm::ErrorKind>>, - ) { + pub fn handle_terminal_events(&mut self, event: Option<Result<Event, crossterm::ErrorKind>>) { + let mut cx = crate::compositor::Context { + editor: &mut self.editor, + executor: &self.executor, + }; // Handle key events - match event { + let should_redraw = match event { Some(Ok(Event::Resize(width, height))) => { - self.terminal.resize(width, height); - - // TODO: simplistic ensure cursor in view for now - // TODO: loop over views - if let Some(view) = self.editor.view_mut() { - view.size = self.terminal.size; - view.ensure_cursor_in_view() - }; + self.terminal.resize(Rect::new(0, 0, width, height)); - self.render(); - } - Some(Ok(Event::Key(event))) => { - // if there's a prompt, it takes priority - if let Some(prompt) = &mut self.prompt { - self.prompt - .as_mut() - .unwrap() - .handle_input(event, &mut self.editor); - - self.render(); - } else if let Some(view) = self.editor.view_mut() { - let keys = vec![event]; - // TODO: sequences (`gg`) - // TODO: handle count other than 1 - match view.doc.mode() { - Mode::Insert => { - if let Some(command) = self.keymap[&Mode::Insert].get(&keys) { - let mut cx = helix_view::commands::Context { - view, - executor: self.executor, - count: 1, - }; - - command(&mut cx); - } else if let KeyEvent { - code: KeyCode::Char(c), - .. - } = event - { - let mut cx = helix_view::commands::Context { - view, - executor: self.executor, - count: 1, - }; - commands::insert::insert_char(&mut cx, c); - } - view.ensure_cursor_in_view(); - } - Mode::Normal => { - if let &[KeyEvent { - code: KeyCode::Char(':'), - .. - }] = keys.as_slice() - { - let prompt = Prompt::new( - ":".to_owned(), - |_input: &str| { - // TODO: i need this duplicate list right now to avoid borrow checker issues - let command_list = vec![ - String::from("q"), - String::from("aaa"), - String::from("bbb"), - String::from("ccc"), - String::from("ddd"), - String::from("eee"), - String::from("averylongcommandaverylongcommandaverylongcommandaverylongcommandaverylongcommand"), - String::from("q"), - String::from("aaa"), - String::from("bbb"), - String::from("ccc"), - String::from("ddd"), - String::from("eee"), - String::from("q"), - String::from("aaa"), - String::from("bbb"), - String::from("ccc"), - String::from("ddd"), - String::from("eee"), - String::from("q"), - String::from("aaa"), - String::from("bbb"), - String::from("ccc"), - String::from("ddd"), - String::from("eee"), - String::from("q"), - String::from("aaa"), - String::from("bbb"), - String::from("ccc"), - String::from("ddd"), - String::from("eee"), - ]; - command_list - .into_iter() - .filter(|command| command.contains(_input)) - .collect() - }, // completion - |editor: &mut Editor, input: &str| match input { - "q" => editor.should_close = true, - _ => (), - }, - ); - - self.prompt = Some(prompt); - - // HAXX: special casing for command mode - } else if let Some(command) = self.keymap[&Mode::Normal].get(&keys) { - let mut cx = helix_view::commands::Context { - view, - executor: self.executor, - count: 1, - }; - command(&mut cx); - - // TODO: simplistic ensure cursor in view for now - view.ensure_cursor_in_view(); - } - } - mode => { - if let Some(command) = self.keymap[&mode].get(&keys) { - let mut cx = helix_view::commands::Context { - view, - executor: self.executor, - count: 1, - }; - command(&mut cx); - - // TODO: simplistic ensure cursor in view for now - view.ensure_cursor_in_view(); - } - } - } - self.render(); - } + self.compositor + .handle_event(Event::Resize(width, height), &mut cx) } - Some(Ok(Event::Mouse(_))) => (), // unhandled + Some(Ok(event)) => self.compositor.handle_event(event, &mut cx), Some(Err(x)) => panic!(x), None => panic!(), }; + + if should_redraw { + self.render(); + // calling render twice here fixes it for some reason + } } pub async fn handle_language_server_message(&mut self, call: Option<helix_lsp::Call>) { @@ -599,11 +142,13 @@ impl<'a> Application<'a> { match notification { Notification::PublishDiagnostics(params) => { let path = Some(params.uri.to_file_path().unwrap()); - let view = self - .editor - .views - .iter_mut() - .find(|view| view.doc.path == path); + let view: Option<&mut helix_view::View> = None; + // TODO: + // let view = self + // .editor + // .views + // .iter_mut() + // .find(|view| view.doc.path == path); if let Some(view) = view { let doc = view.doc.text().slice(..); @@ -653,7 +198,7 @@ impl<'a> Application<'a> { } pub async fn run(&mut self) -> Result<(), Error> { - enable_raw_mode()?; + terminal::enable_raw_mode()?; let mut stdout = stdout(); @@ -663,7 +208,7 @@ impl<'a> Application<'a> { let hook = std::panic::take_hook(); std::panic::set_hook(Box::new(move |info| { execute!(std::io::stdout(), terminal::LeaveAlternateScreen); - disable_raw_mode(); + terminal::disable_raw_mode(); hook(info); })); @@ -674,7 +219,7 @@ impl<'a> Application<'a> { execute!(stdout, terminal::LeaveAlternateScreen)?; - disable_raw_mode()?; + terminal::disable_raw_mode()?; Ok(()) } diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs new file mode 100644 index 00000000..b345d2e8 --- /dev/null +++ b/helix-term/src/commands.rs @@ -0,0 +1,735 @@ +use helix_core::{ + graphemes, + indent::TAB_WIDTH, + regex::Regex, + register, selection, + state::{Direction, Granularity, State}, + ChangeSet, Range, Selection, Tendril, Transaction, +}; + +use once_cell::sync::Lazy; + +use crate::compositor::Compositor; +use crate::ui::Prompt; + +use helix_view::{ + document::Mode, + view::{View, PADDING}, + Editor, +}; + +pub struct Context<'a, 'b> { + pub count: usize, + pub view: &'a mut View, + pub executor: &'a smol::Executor<'b>, + + pub callback: Option<crate::compositor::Callback>, +} + +/// A command is a function that takes the current state and a count, and does a side-effect on the +/// state (usually by creating and applying a transaction). +pub type Command = fn(cx: &mut Context); + +pub fn move_char_left(cx: &mut Context) { + let selection = + cx.view + .doc + .state + .move_selection(Direction::Backward, Granularity::Character, cx.count); + cx.view.doc.set_selection(selection); +} + +pub fn move_char_right(cx: &mut Context) { + let selection = + cx.view + .doc + .state + .move_selection(Direction::Forward, Granularity::Character, cx.count); + cx.view.doc.set_selection(selection); +} + +pub fn move_line_up(cx: &mut Context) { + let selection = + cx.view + .doc + .state + .move_selection(Direction::Backward, Granularity::Line, cx.count); + cx.view.doc.set_selection(selection); +} + +pub fn move_line_down(cx: &mut Context) { + let selection = + cx.view + .doc + .state + .move_selection(Direction::Forward, Granularity::Line, cx.count); + cx.view.doc.set_selection(selection); +} + +pub fn move_line_end(cx: &mut Context) { + let lines = selection_lines(&cx.view.doc.state); + + let positions = lines + .into_iter() + .map(|index| { + // adjust all positions to the end of the line. + + // Line end is pos at the start of next line - 1 + // subtract another 1 because the line ends with \n + cx.view.doc.text().line_to_char(index + 1).saturating_sub(2) + }) + .map(|pos| Range::new(pos, pos)); + + let selection = Selection::new(positions.collect(), 0); + + cx.view.doc.set_selection(selection); +} + +pub fn move_line_start(cx: &mut Context) { + let lines = selection_lines(&cx.view.doc.state); + + let positions = lines + .into_iter() + .map(|index| { + // adjust all positions to the start of the line. + cx.view.doc.text().line_to_char(index) + }) + .map(|pos| Range::new(pos, pos)); + + let selection = Selection::new(positions.collect(), 0); + + cx.view.doc.set_selection(selection); +} + +pub fn move_next_word_start(cx: &mut Context) { + let pos = cx.view.doc.state.move_pos( + cx.view.doc.selection().cursor(), + Direction::Forward, + Granularity::Word, + cx.count, + ); + + cx.view.doc.set_selection(Selection::point(pos)); +} + +pub fn move_prev_word_start(cx: &mut Context) { + let pos = cx.view.doc.state.move_pos( + cx.view.doc.selection().cursor(), + Direction::Backward, + Granularity::Word, + cx.count, + ); + + cx.view.doc.set_selection(Selection::point(pos)); +} + +pub fn move_next_word_end(cx: &mut Context) { + let pos = State::move_next_word_end( + &cx.view.doc.text().slice(..), + cx.view.doc.selection().cursor(), + cx.count, + ); + + cx.view.doc.set_selection(Selection::point(pos)); +} + +pub fn move_file_start(cx: &mut Context) { + cx.view.doc.set_selection(Selection::point(0)); + + cx.view.doc.mode = Mode::Normal; +} + +pub fn move_file_end(cx: &mut Context) { + let text = &cx.view.doc.text(); + let last_line = text.line_to_char(text.len_lines().saturating_sub(2)); + cx.view.doc.set_selection(Selection::point(last_line)); + + cx.view.doc.mode = Mode::Normal; +} + +pub fn check_cursor_in_view(view: &View) -> bool { + let cursor = view.doc.selection().cursor(); + let line = view.doc.text().char_to_line(cursor); + let document_end = view.first_line + view.size.1.saturating_sub(1) as usize; + + if (line > document_end.saturating_sub(PADDING)) | (line < view.first_line + PADDING) { + return false; + } + true +} + +pub fn page_up(cx: &mut Context) { + if cx.view.first_line < PADDING { + return; + } + + cx.view.first_line = cx.view.first_line.saturating_sub(cx.view.size.1 as usize); + + if !check_cursor_in_view(cx.view) { + let text = cx.view.doc.text(); + let pos = text.line_to_char(cx.view.last_line().saturating_sub(PADDING)); + cx.view.doc.set_selection(Selection::point(pos)); + } +} + +pub fn page_down(cx: &mut Context) { + cx.view.first_line += cx.view.size.1 as usize + PADDING; + + if cx.view.first_line < cx.view.doc.text().len_lines() { + let text = cx.view.doc.text(); + let pos = text.line_to_char(cx.view.first_line as usize); + cx.view.doc.set_selection(Selection::point(pos)); + } +} + +pub fn half_page_up(cx: &mut Context) { + if cx.view.first_line < PADDING { + return; + } + + cx.view.first_line = cx + .view + .first_line + .saturating_sub(cx.view.size.1 as usize / 2); + + if !check_cursor_in_view(cx.view) { + let text = &cx.view.doc.text(); + let pos = text.line_to_char(cx.view.last_line() - PADDING); + cx.view.doc.set_selection(Selection::point(pos)); + } +} + +pub fn half_page_down(cx: &mut Context) { + let lines = cx.view.doc.text().len_lines(); + if cx.view.first_line < lines.saturating_sub(cx.view.size.1 as usize) { + cx.view.first_line += cx.view.size.1 as usize / 2; + } + if !check_cursor_in_view(cx.view) { + let text = cx.view.doc.text(); + let pos = text.line_to_char(cx.view.first_line as usize); + cx.view.doc.set_selection(Selection::point(pos)); + } +} +// avoid select by default by having a visual mode switch that makes movements into selects + +pub fn extend_char_left(cx: &mut Context) { + let selection = + cx.view + .doc + .state + .extend_selection(Direction::Backward, Granularity::Character, cx.count); + cx.view.doc.set_selection(selection); +} + +pub fn extend_char_right(cx: &mut Context) { + let selection = + cx.view + .doc + .state + .extend_selection(Direction::Forward, Granularity::Character, cx.count); + cx.view.doc.set_selection(selection); +} + +pub fn extend_line_up(cx: &mut Context) { + let selection = + cx.view + .doc + .state + .extend_selection(Direction::Backward, Granularity::Line, cx.count); + cx.view.doc.set_selection(selection); +} + +pub fn extend_line_down(cx: &mut Context) { + let selection = + cx.view + .doc + .state + .extend_selection(Direction::Forward, Granularity::Line, cx.count); + cx.view.doc.set_selection(selection); +} + +pub fn split_selection_on_newline(cx: &mut Context) { + let text = &cx.view.doc.text().slice(..); + // only compile the regex once + #[allow(clippy::trivial_regex)] + static REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(r"\n").unwrap()); + let selection = selection::split_on_matches(text, cx.view.doc.selection(), ®EX); + cx.view.doc.set_selection(selection); +} + +pub fn select_line(cx: &mut Context) { + // TODO: count + let pos = cx.view.doc.selection().primary(); + let text = cx.view.doc.text(); + let line = text.char_to_line(pos.head); + let start = text.line_to_char(line); + let end = text.line_to_char(line + 1).saturating_sub(1); + + cx.view.doc.set_selection(Selection::single(start, end)); +} + +pub fn delete_selection(cx: &mut Context) { + let transaction = Transaction::change_by_selection(&cx.view.doc.state, |range| { + (range.from(), range.to() + 1, None) + }); + cx.view.doc.apply(&transaction); + + append_changes_to_history(cx); +} + +pub fn change_selection(cx: &mut Context) { + delete_selection(cx); + insert_mode(cx); +} + +pub fn collapse_selection(cx: &mut Context) { + let selection = cx + .view + .doc + .selection() + .transform(|range| Range::new(range.head, range.head)); + + cx.view.doc.set_selection(selection); +} + +pub fn flip_selections(cx: &mut Context) { + let selection = cx + .view + .doc + .selection() + .transform(|range| Range::new(range.head, range.anchor)); + + cx.view.doc.set_selection(selection); +} + +fn enter_insert_mode(cx: &mut Context) { + cx.view.doc.mode = Mode::Insert; + + append_changes_to_history(cx); +} +// inserts at the start of each selection +pub fn insert_mode(cx: &mut Context) { + enter_insert_mode(cx); + + let selection = cx + .view + .doc + .selection() + .transform(|range| Range::new(range.to(), range.from())); + cx.view.doc.set_selection(selection); +} + +// inserts at the end of each selection +pub fn append_mode(cx: &mut Context) { + enter_insert_mode(cx); + cx.view.doc.restore_cursor = true; + + // TODO: as transaction + let text = &cx.view.doc.text().slice(..); + let selection = cx.view.doc.selection().transform(|range| { + // TODO: to() + next char + Range::new( + range.from(), + graphemes::next_grapheme_boundary(text, range.to()), + ) + }); + cx.view.doc.set_selection(selection); +} + +// TODO: I, A, o and O can share a lot of the primitives. +pub fn command_mode(cx: &mut Context) { + cx.callback = Some(Box::new(|compositor: &mut Compositor| { + let prompt = Prompt::new( + ":".to_owned(), + |_input: &str| { + // TODO: i need this duplicate list right now to avoid borrow checker issues + let command_list = vec![ + String::from("q"), + String::from("aaa"), + String::from("bbb"), + String::from("ccc"), + String::from("ddd"), + String::from("eee"), + String::from("averylongcommandaverylongcommandaverylongcommandaverylongcommandaverylongcommand"), + String::from("q"), + String::from("aaa"), + String::from("bbb"), + String::from("ccc"), + String::from("ddd"), + String::from("eee"), + String::from("q"), + String::from("aaa"), + String::from("bbb"), + String::from("ccc"), + String::from("ddd"), + String::from("eee"), + String::from("q"), + String::from("aaa"), + String::from("bbb"), + String::from("ccc"), + String::from("ddd"), + String::from("eee"), + String::from("q"), + String::from("aaa"), + String::from("bbb"), + String::from("ccc"), + String::from("ddd"), + String::from("eee"), + ]; + command_list + .into_iter() + .filter(|command| command.contains(_input)) + .collect() + }, // completion + |editor: &mut Editor, input: &str| match input { + "q" => editor.should_close = true, + _ => (), + }, + ); + compositor.push(Box::new(prompt)); + })); +} + +// calculate line numbers for each selection range +fn selection_lines(state: &State) -> Vec<usize> { + let mut lines = state + .selection + .ranges() + .iter() + .map(|range| state.doc.char_to_line(range.head)) + .collect::<Vec<_>>(); + + lines.sort_unstable(); // sorting by usize so _unstable is preferred + lines.dedup(); + + lines +} + +// I inserts at the start of each line with a selection +pub fn prepend_to_line(cx: &mut Context) { + enter_insert_mode(cx); + + move_line_start(cx); +} + +// A inserts at the end of each line with a selection +pub fn append_to_line(cx: &mut Context) { + enter_insert_mode(cx); + + move_line_end(cx); +} + +// o inserts a new line after each line with a selection +pub fn open_below(cx: &mut Context) { + enter_insert_mode(cx); + + let lines = selection_lines(&cx.view.doc.state); + + let positions: Vec<_> = lines + .into_iter() + .map(|index| { + // adjust all positions to the end of the line/start of the next one. + cx.view.doc.text().line_to_char(index + 1) + }) + .collect(); + + // TODO: use same logic as insert_newline for indentation + let changes = positions.iter().copied().map(|index| + // generate changes + (index, index, Some(Tendril::from_char('\n')))); + + // TODO: count actually inserts "n" new lines and starts editing on all of them. + // TODO: append "count" newlines and modify cursors to those lines + + let selection = Selection::new( + positions + .iter() + .copied() + .map(|pos| Range::new(pos, pos)) + .collect(), + 0, + ); + + let transaction = Transaction::change(&cx.view.doc.state, changes).with_selection(selection); + + cx.view.doc.apply(&transaction); +} + +// O inserts a new line before each line with a selection + +fn append_changes_to_history(cx: &mut Context) { + if cx.view.doc.changes.is_empty() { + return; + } + + let new_changeset = ChangeSet::new(cx.view.doc.text()); + let changes = std::mem::replace(&mut cx.view.doc.changes, new_changeset); + // Instead of doing this messy merge we could always commit, and based on transaction + // annotations either add a new layer or compose into the previous one. + let transaction = Transaction::from(changes).with_selection(cx.view.doc.selection().clone()); + + // increment document version + // TODO: needs to happen on undo/redo too + cx.view.doc.version += 1; + + // TODO: trigger lsp/documentDidChange with changes + + // HAXX: we need to reconstruct the state as it was before the changes.. + let old_state = std::mem::replace(&mut cx.view.doc.old_state, cx.view.doc.state.clone()); + // TODO: take transaction by value? + cx.view + .doc + .history + .commit_revision(&transaction, &old_state); + + // TODO: notify LSP of changes +} + +pub fn normal_mode(cx: &mut Context) { + cx.view.doc.mode = Mode::Normal; + + append_changes_to_history(cx); + + // if leaving append mode, move cursor back by 1 + if cx.view.doc.restore_cursor { + let text = &cx.view.doc.text().slice(..); + let selection = cx.view.doc.selection().transform(|range| { + Range::new( + range.from(), + graphemes::prev_grapheme_boundary(text, range.to()), + ) + }); + cx.view.doc.set_selection(selection); + + cx.view.doc.restore_cursor = false; + } +} + +pub fn goto_mode(cx: &mut Context) { + cx.view.doc.mode = Mode::Goto; +} + +// NOTE: Transactions in this module get appended to history when we switch back to normal mode. +pub mod insert { + use super::*; + // TODO: insert means add text just before cursor, on exit we should be on the last letter. + pub fn insert_char(cx: &mut Context, c: char) { + let c = Tendril::from_char(c); + let transaction = Transaction::insert(&cx.view.doc.state, c); + + cx.view.doc.apply(&transaction); + } + + pub fn insert_tab(cx: &mut Context) { + insert_char(cx, '\t'); + } + + pub fn insert_newline(cx: &mut Context) { + let transaction = Transaction::change_by_selection(&cx.view.doc.state, |range| { + let indent_level = helix_core::indent::suggested_indent_for_pos( + cx.view.doc.syntax.as_ref(), + &cx.view.doc.state, + range.head, + ); + let indent = " ".repeat(TAB_WIDTH).repeat(indent_level); + let mut text = String::with_capacity(1 + indent.len()); + text.push('\n'); + text.push_str(&indent); + (range.head, range.head, Some(text.into())) + }); + cx.view.doc.apply(&transaction); + } + + // TODO: handle indent-aware delete + pub fn delete_char_backward(cx: &mut Context) { + let text = &cx.view.doc.text().slice(..); + let transaction = Transaction::change_by_selection(&cx.view.doc.state, |range| { + ( + graphemes::nth_prev_grapheme_boundary(text, range.head, cx.count), + range.head, + None, + ) + }); + cx.view.doc.apply(&transaction); + } + + pub fn delete_char_forward(cx: &mut Context) { + let text = &cx.view.doc.text().slice(..); + let transaction = Transaction::change_by_selection(&cx.view.doc.state, |range| { + ( + range.head, + graphemes::nth_next_grapheme_boundary(text, range.head, cx.count), + None, + ) + }); + cx.view.doc.apply(&transaction); + } +} + +pub fn insert_char_prompt(prompt: &mut Prompt, c: char) { + prompt.insert_char(c); +} + +// Undo / Redo + +pub fn undo(cx: &mut Context) { + if let Some(revert) = cx.view.doc.history.undo() { + cx.view.doc.version += 1; + cx.view.doc.apply(&revert); + } + + // TODO: each command could simply return a Option<transaction>, then the higher level handles storing it? +} + +pub fn redo(cx: &mut Context) { + if let Some(transaction) = cx.view.doc.history.redo() { + cx.view.doc.version += 1; + cx.view.doc.apply(&transaction); + } +} + +// Yank / Paste + +pub fn yank(cx: &mut Context) { + // TODO: should selections be made end inclusive? + let values = cx + .view + .doc + .state + .selection() + .fragments(&cx.view.doc.text().slice(..)) + .map(|cow| cow.into_owned()) + .collect(); + + // TODO: allow specifying reg + let reg = '"'; + register::set(reg, values); +} + +pub fn paste(cx: &mut Context) { + // TODO: allow specifying reg + let reg = '"'; + if let Some(values) = register::get(reg) { + let repeat = std::iter::repeat( + values + .last() + .map(|value| Tendril::from_slice(value)) + .unwrap(), + ); + + // TODO: if any of values ends \n it's linewise paste + // + // p => paste after + // P => paste before + // alt-p => paste every yanked selection after selected text + // alt-P => paste every yanked selection before selected text + // R => replace selected text with yanked text + // alt-R => replace selected text with every yanked text + // + // append => insert at next line + // insert => insert at start of line + // replace => replace + // default insert + + let linewise = values.iter().any(|value| value.ends_with('\n')); + + let mut values = values.into_iter().map(Tendril::from).chain(repeat); + + let transaction = if linewise { + // paste on the next line + // TODO: can simply take a range + modifier and compute the right pos without ifs + let text = cx.view.doc.text(); + Transaction::change_by_selection(&cx.view.doc.state, |range| { + let line_end = text.line_to_char(text.char_to_line(range.head) + 1); + (line_end, line_end, Some(values.next().unwrap())) + }) + } else { + Transaction::change_by_selection(&cx.view.doc.state, |range| { + (range.head + 1, range.head + 1, Some(values.next().unwrap())) + }) + }; + + cx.view.doc.apply(&transaction); + append_changes_to_history(cx); + } +} + +fn get_lines(view: &View) -> Vec<usize> { + let mut lines = Vec::new(); + + // Get all line numbers + for range in view.doc.selection().ranges() { + let start = view.doc.text().char_to_line(range.from()); + let end = view.doc.text().char_to_line(range.to()); + + for line in start..=end { + lines.push(line) + } + } + lines.sort_unstable(); // sorting by usize so _unstable is preferred + lines.dedup(); + lines +} + +pub fn indent(cx: &mut Context) { + let lines = get_lines(cx.view); + + // Indent by one level + let indent = Tendril::from(" ".repeat(TAB_WIDTH)); + + let transaction = Transaction::change( + &cx.view.doc.state, + lines.into_iter().map(|line| { + let pos = cx.view.doc.text().line_to_char(line); + (pos, pos, Some(indent.clone())) + }), + ); + cx.view.doc.apply(&transaction); + append_changes_to_history(cx); +} + +pub fn unindent(cx: &mut Context) { + let lines = get_lines(cx.view); + let mut changes = Vec::with_capacity(lines.len()); + + for line_idx in lines { + let line = cx.view.doc.text().line(line_idx); + let mut width = 0; + + for ch in line.chars() { + match ch { + ' ' => width += 1, + '\t' => width = (width / TAB_WIDTH + 1) * TAB_WIDTH, + _ => break, + } + + if width >= TAB_WIDTH { + break; + } + } + + if width > 0 { + let start = cx.view.doc.text().line_to_char(line_idx); + changes.push((start, start + width, None)) + } + } + + let transaction = Transaction::change(&cx.view.doc.state, changes.into_iter()); + + cx.view.doc.apply(&transaction); + append_changes_to_history(cx); +} + +pub fn indent_selection(_cx: &mut Context) { + // loop over each line and recompute proper indentation + unimplemented!() +} + +// + +pub fn save(cx: &mut Context) { + // Spawns an async task to actually do the saving. This way we prevent blocking. + + // TODO: handle save errors somehow? + cx.executor.spawn(cx.view.doc.save()).detach(); +} diff --git a/helix-term/src/component.rs b/helix-term/src/component.rs deleted file mode 100644 index 08d6c620..00000000 --- a/helix-term/src/component.rs +++ /dev/null @@ -1,20 +0,0 @@ -// IDEA: render to a cache buffer, then if not changed, copy the buf into the parent -type Surface = (); -pub trait Component { - /// Process input events, return true if handled. - fn process_event(&mut self, event: crossterm::event::Event, args: ()) -> bool; - /// Should redraw? Useful for saving redraw cycles if we know component didn't change. - fn should_update(&self) -> bool { - true - } - - fn render(&mut self, surface: &mut Surface, args: ()); -} - -// HStack / VStack -// focus by component id: each View/Editor gets it's own incremental id at create -// Component: View(Arc<State>) -> multiple views can point to same state -// id 0 = prompt? -// when entering to prompt, it needs to direct Commands to last focus window -// -> prompt.trigger(focus_id), on_leave -> focus(focus_id) -// popups on another layer diff --git a/helix-term/src/compositor.rs b/helix-term/src/compositor.rs new file mode 100644 index 00000000..2e65f02a --- /dev/null +++ b/helix-term/src/compositor.rs @@ -0,0 +1,155 @@ +// Features: +// Tracks currently focused component which receives all input +// Event loop is external as opposed to cursive-rs +// Calls render on the component and translates screen coords to local component coords +// +// TODO: +// Q: where is the Application state stored? do we store it into an external static var? +// A: probably makes sense to initialize the editor into a `static Lazy<>` global var. +// +// Q: how do we composit nested structures? There should be sub-components/views +// +// Each component declares it's own size constraints and gets fitted based on it's parent. +// Q: how does this work with popups? +// cursive does compositor.screen_mut().add_layer_at(pos::absolute(x, y), <component>) + +use crossterm::event::Event; +use helix_core::Position; +use smol::Executor; +use tui::buffer::Buffer as Surface; +use tui::layout::Rect; + +pub type Callback = Box<dyn Fn(&mut Compositor)>; + +// --> EventResult should have a callback that takes a context with methods like .popup(), +// .prompt() etc. That way we can abstract it from the renderer. +// Q: How does this interact with popups where we need to be able to specify the rendering of the +// popup? +// A: It could just take a textarea. +// +// If Compositor was specified in the callback that's then problematic because of + +// Cursive-inspired +pub enum EventResult { + Ignored, + Consumed(Option<Callback>), +} + +use helix_view::{Editor, View}; +// shared with commands.rs +pub struct Context<'a> { + pub editor: &'a mut Editor, + pub executor: &'static smol::Executor<'static>, +} + +pub trait Component { + /// Process input events, return true if handled. + fn handle_event(&mut self, event: Event, ctx: &mut Context) -> EventResult; + // , args: () + + /// Should redraw? Useful for saving redraw cycles if we know component didn't change. + fn should_update(&self) -> bool { + true + } + + fn render(&self, area: Rect, frame: &mut Surface, ctx: &mut Context); + + fn cursor_position(&self, area: Rect, ctx: &mut Context) -> Option<Position> { + None + } +} + +// struct Editor { }; + +// For v1: +// Child views are something each view needs to handle on it's own for now, positioning and sizing +// options, focus tracking. In practice this is simple: we only will need special solving for +// splits etc + +// impl Editor { +// fn render(&mut self, surface: &mut Surface, args: ()) { +// // compute x, y, w, h rects for sub-views! +// // get surface area +// // get constraints for textarea, statusbar +// // -> cassowary-rs + +// // first render textarea +// // then render statusbar +// } +// } + +// usecases to consider: +// - a single view with subviews (textarea + statusbar) +// - a popup panel / dialog with it's own interactions +// - an autocomplete popup that doesn't change focus + +//fn main() { +// let root = Editor::new(); +// let compositor = Compositor::new(); + +// compositor.push(root); + +// // pos: clip to bottom of screen +// compositor.push_at(pos, Prompt::new( +// ":", +// (), +// |input: &str| match input {} +// )); // TODO: this Prompt needs to somehow call compositor.pop() on close, but it can't refer to parent +// // Cursive solves this by allowing to return a special result on process_event +// // that's either Ignore | Consumed(Opt<C>) where C: fn (Compositor) -> () + +// // TODO: solve popup focus: we want to push autocomplete popups on top of the current layer +// // but retain the focus where it was. The popup will also need to update as we type into the +// // textarea. It should also capture certain input, such as tab presses etc +// // +// // 1) This could be faked by the top layer pushing down edits into the previous layer. +// // 2) Alternatively, +//} + +pub struct Compositor { + layers: Vec<Box<dyn Component>>, +} + +impl Compositor { + pub fn new() -> Self { + Self { layers: Vec::new() } + } + + pub fn push(&mut self, layer: Box<dyn Component>) { + self.layers.push(layer); + } + + pub fn pop(&mut self) { + self.layers.pop(); + } + + pub fn handle_event(&mut self, event: Event, cx: &mut Context) -> bool { + // TODO: custom focus + if let Some(layer) = self.layers.last_mut() { + return match layer.handle_event(event, cx) { + EventResult::Consumed(Some(callback)) => { + callback(self); + true + } + EventResult::Consumed(None) => true, + EventResult::Ignored => false, + }; + } + false + } + + pub fn render(&self, area: Rect, surface: &mut Surface, cx: &mut Context) { + for layer in &self.layers { + layer.render(area, surface, cx) + } + } + + pub fn cursor_position(&self, area: Rect, cx: &mut Context) -> Position { + for layer in self.layers.iter().rev() { + if let Some(pos) = layer.cursor_position(area, cx) { + return pos; + } + } + panic!("No layer returned a position!"); + } +} diff --git a/helix-term/src/helix.log b/helix-term/src/helix.log new file mode 100644 index 00000000..e69de29b --- /dev/null +++ b/helix-term/src/helix.log diff --git a/helix-term/src/keymap.rs b/helix-term/src/keymap.rs new file mode 100644 index 00000000..af46f7a4 --- /dev/null +++ b/helix-term/src/keymap.rs @@ -0,0 +1,217 @@ +use crate::commands::{self, Command}; +use helix_core::hashmap; +use helix_view::document::Mode; +use std::collections::HashMap; + +// Kakoune-inspired: +// mode = { +// normal = { +// q = record_macro +// w = (next) word +// W = next WORD +// e = end of word +// E = end of WORD +// r = +// t = 'till char +// y = yank +// u = undo +// U = redo +// i = insert +// I = INSERT (start of line) +// o = open below (insert on new line below) +// O = open above (insert on new line above) +// p = paste (before cursor) +// P = PASTE (after cursor) +// ` = +// [ = select to text object start (alt = select whole object) +// ] = select to text object end +// { = extend to inner object start +// } = extend to inner object end +// a = append +// A = APPEND (end of line) +// s = split +// S = select +// d = delete() +// f = find_char() +// g = goto (gg, G, gc, gd, etc) +// +// h = move_char_left(n) +// j = move_line_down(n) +// k = move_line_up(n) +// l = move_char_right(n) +// : = command line +// ; = collapse selection to cursor +// " = use register +// ` = convert case? (to lower) (alt = swap case) +// ~ = convert to upper case +// . = repeat last command +// \ = disable hook? +// / = search +// > = indent +// < = deindent +// % = select whole buffer (in vim = jump to matching bracket) +// * = search pattern in selection +// ( = rotate main selection backward +// ) = rotate main selection forward +// - = trim selections? (alt = merge contiguous sel together) +// @ = convert tabs to spaces +// & = align cursor +// ? = extend to next given regex match (alt = to prev) +// +// in kakoune these are alt-h alt-l / gh gl +// select from curs to begin end / move curs to begin end +// 0 = start of line +// ^ = start of line (first non blank char) +// $ = end of line +// +// z = save selections +// Z = restore selections +// x = select line +// X = extend line +// c = change selected text +// C = copy selection? +// v = view menu (viewport manipulation) +// b = select to previous word start +// B = select to previous WORD start +// +// +// +// +// +// +// = = align? +// + = +// } +// +// gd = goto definition +// gr = goto reference +// } + +// #[cfg(feature = "term")] +pub use crossterm::event::{KeyCode, KeyEvent as Key, KeyModifiers as Modifiers}; + +// TODO: could be trie based +pub type Keymap = HashMap<Vec<Key>, Command>; +pub type Keymaps = HashMap<Mode, Keymap>; + +macro_rules! key { + ($ch:expr) => { + Key { + code: KeyCode::Char($ch), + modifiers: Modifiers::NONE, + } + }; +} + +macro_rules! shift { + ($ch:expr) => { + Key { + code: KeyCode::Char($ch), + modifiers: Modifiers::SHIFT, + } + }; +} + +macro_rules! ctrl { + ($ch:expr) => { + Key { + code: KeyCode::Char($ch), + modifiers: Modifiers::CONTROL, + } + }; +} + +// macro_rules! alt { +// ($ch:expr) => { +// Key { +// code: KeyCode::Char($ch), +// modifiers: Modifiers::ALT, +// } +// }; +// } + +pub fn default() -> Keymaps { + hashmap!( + Mode::Normal => + // as long as you cast the first item, rust is able to infer the other cases + hashmap!( + vec![key!('h')] => commands::move_char_left as Command, + vec![key!('j')] => commands::move_line_down, + vec![key!('k')] => commands::move_line_up, + vec![key!('0')] => commands::move_line_start, + vec![key!('$')] => commands::move_line_end, + vec![key!('l')] => commands::move_char_right, + vec![shift!('H')] => commands::extend_char_left, + vec![shift!('J')] => commands::extend_line_down, + vec![shift!('K')] => commands::extend_line_up, + vec![shift!('L')] => commands::extend_char_right, + vec![key!('w')] => commands::move_next_word_start, + vec![key!('b')] => commands::move_prev_word_start, + vec![key!('e')] => commands::move_next_word_end, + vec![key!('g')] => commands::goto_mode, + vec![key!('i')] => commands::insert_mode, + vec![shift!('I')] => commands::prepend_to_line, + vec![key!('a')] => commands::append_mode, + vec![shift!('A')] => commands::append_to_line, + vec![key!('o')] => commands::open_below, + vec![key!('d')] => commands::delete_selection, + vec![key!('c')] => commands::change_selection, + vec![key!('s')] => commands::split_selection_on_newline, + vec![key!(';')] => commands::collapse_selection, + // TODO should be alt(;) + vec![key!('%')] => commands::flip_selections, + vec![key!('x')] => commands::select_line, + vec![key!('u')] => commands::undo, + vec![shift!('U')] => commands::redo, + vec![key!('y')] => commands::yank, + vec![key!('p')] => commands::paste, + vec![key!('>')] => commands::indent, + vec![key!('<')] => commands::unindent, + vec![key!(':')] => commands::command_mode, + vec![Key { + code: KeyCode::Esc, + modifiers: Modifiers::NONE + }] => commands::normal_mode, + vec![Key { + code: KeyCode::PageUp, + modifiers: Modifiers::NONE + }] => commands::page_up, + vec![Key { + code: KeyCode::PageDown, + modifiers: Modifiers::NONE + }] => commands::page_down, + vec![ctrl!('u')] => commands::half_page_up, + vec![ctrl!('d')] => commands::half_page_down, + ), + Mode::Insert => hashmap!( + vec![Key { + code: KeyCode::Esc, + modifiers: Modifiers::NONE + }] => commands::normal_mode as Command, + vec![Key { + code: KeyCode::Backspace, + modifiers: Modifiers::NONE + }] => commands::insert::delete_char_backward, + vec![Key { + code: KeyCode::Delete, + modifiers: Modifiers::NONE + }] => commands::insert::delete_char_forward, + vec![Key { + code: KeyCode::Enter, + modifiers: Modifiers::NONE + }] => commands::insert::insert_newline, + vec![Key { + code: KeyCode::Tab, + modifiers: Modifiers::NONE + }] => commands::insert::insert_tab, + ), + Mode::Goto => hashmap!( + vec![Key { + code: KeyCode::Esc, + modifiers: Modifiers::NONE + }] => commands::normal_mode as Command, + vec![key!('g')] => commands::move_file_start as Command, + vec![key!('e')] => commands::move_file_end as Command, + ), + ) +} diff --git a/helix-term/src/main.rs b/helix-term/src/main.rs index 9378d3ee..f350b4c1 100644 --- a/helix-term/src/main.rs +++ b/helix-term/src/main.rs @@ -1,6 +1,11 @@ #![allow(unused)] mod application; +mod commands; +mod compositor; +mod keymap; +mod terminal; +mod ui; use application::Application; diff --git a/helix-term/src/terminal.rs b/helix-term/src/terminal.rs new file mode 100644 index 00000000..e40343bd --- /dev/null +++ b/helix-term/src/terminal.rs @@ -0,0 +1,221 @@ +use std::io; +use tui::{ + backend::Backend, + buffer::Buffer, + layout::Rect, + widgets::{StatefulWidget, Widget}, +}; + +#[derive(Debug, Clone, PartialEq)] +/// UNSTABLE +enum ResizeBehavior { + Fixed, + Auto, +} + +#[derive(Debug, Clone, PartialEq)] +/// UNSTABLE +pub struct Viewport { + area: Rect, + resize_behavior: ResizeBehavior, +} + +impl Viewport { + /// UNSTABLE + pub fn fixed(area: Rect) -> Viewport { + Viewport { + area, + resize_behavior: ResizeBehavior::Fixed, + } + } +} + +#[derive(Debug, Clone, PartialEq)] +/// Options to pass to [`Terminal::with_options`] +pub struct TerminalOptions { + /// Viewport used to draw to the terminal + pub viewport: Viewport, +} + +/// Interface to the terminal backed by Termion +#[derive(Debug)] +pub struct Terminal<B> +where + B: Backend, +{ + backend: B, + /// Holds the results of the current and previous draw calls. The two are compared at the end + /// of each draw pass to output the necessary updates to the terminal + buffers: [Buffer; 2], + /// Index of the current buffer in the previous array + current: usize, + /// Whether the cursor is currently hidden + hidden_cursor: bool, + /// Viewport + viewport: Viewport, +} + +impl<B> Drop for Terminal<B> +where + B: Backend, +{ + fn drop(&mut self) { + // Attempt to restore the cursor state + if self.hidden_cursor { + if let Err(err) = self.show_cursor() { + eprintln!("Failed to show the cursor: {}", err); + } + } + } +} + +impl<B> Terminal<B> +where + B: Backend, +{ + /// Wrapper around Terminal initialization. Each buffer is initialized with a blank string and + /// default colors for the foreground and the background + pub fn new(backend: B) -> io::Result<Terminal<B>> { + let size = backend.size()?; + Terminal::with_options( + backend, + TerminalOptions { + viewport: Viewport { + area: size, + resize_behavior: ResizeBehavior::Auto, + }, + }, + ) + } + + /// UNSTABLE + pub fn with_options(backend: B, options: TerminalOptions) -> io::Result<Terminal<B>> { + Ok(Terminal { + backend, + buffers: [ + Buffer::empty(options.viewport.area), + Buffer::empty(options.viewport.area), + ], + current: 0, + hidden_cursor: false, + viewport: options.viewport, + }) + } + + // /// Get a Frame object which provides a consistent view into the terminal state for rendering. + // pub fn get_frame(&mut self) -> Frame<B> { + // Frame { + // terminal: self, + // cursor_position: None, + // } + // } + + pub fn current_buffer_mut(&mut self) -> &mut Buffer { + &mut self.buffers[self.current] + } + + pub fn backend(&self) -> &B { + &self.backend + } + + pub fn backend_mut(&mut self) -> &mut B { + &mut self.backend + } + + /// Obtains a difference between the previous and the current buffer and passes it to the + /// current backend for drawing. + pub fn flush(&mut self) -> io::Result<()> { + let previous_buffer = &self.buffers[1 - self.current]; + let current_buffer = &self.buffers[self.current]; + let updates = previous_buffer.diff(current_buffer); + self.backend.draw(updates.into_iter()) + } + + /// Updates the Terminal so that internal buffers match the requested size. Requested size will + /// be saved so the size can remain consistent when rendering. + /// This leads to a full clear of the screen. + pub fn resize(&mut self, area: Rect) -> io::Result<()> { + self.buffers[self.current].resize(area); + self.buffers[1 - self.current].resize(area); + self.viewport.area = area; + self.clear() + } + + /// Queries the backend for size and resizes if it doesn't match the previous size. + pub fn autoresize(&mut self) -> io::Result<()> { + if self.viewport.resize_behavior == ResizeBehavior::Auto { + let size = self.size()?; + if size != self.viewport.area { + self.resize(size)?; + } + }; + Ok(()) + } + + /// Synchronizes terminal size, calls the rendering closure, flushes the current internal state + /// and prepares for the next draw call. + pub fn draw(&mut self) -> io::Result<()> { + // // Autoresize - otherwise we get glitches if shrinking or potential desync between widgets + // // and the terminal (if growing), which may OOB. + // self.autoresize()?; + + // let mut frame = self.get_frame(); + // f(&mut frame); + // // We can't change the cursor position right away because we have to flush the frame to + // // stdout first. But we also can't keep the frame around, since it holds a &mut to + // // Terminal. Thus, we're taking the important data out of the Frame and dropping it. + // let cursor_position = frame.cursor_position; + + // Draw to stdout + self.flush()?; + + // match cursor_position { + // None => self.hide_cursor()?, + // Some((x, y)) => { + // self.show_cursor()?; + // self.set_cursor(x, y)?; + // } + // } + + // Swap buffers + self.buffers[1 - self.current].reset(); + self.current = 1 - self.current; + + // Flush + self.backend.flush()?; + Ok(()) + } + + pub fn hide_cursor(&mut self) -> io::Result<()> { + self.backend.hide_cursor()?; + self.hidden_cursor = true; + Ok(()) + } + + pub fn show_cursor(&mut self) -> io::Result<()> { + self.backend.show_cursor()?; + self.hidden_cursor = false; + Ok(()) + } + + pub fn get_cursor(&mut self) -> io::Result<(u16, u16)> { + self.backend.get_cursor() + } + + pub fn set_cursor(&mut self, x: u16, y: u16) -> io::Result<()> { + self.backend.set_cursor(x, y) + } + + /// Clear the terminal and force a full redraw on the next draw call. + pub fn clear(&mut self) -> io::Result<()> { + self.backend.clear()?; + // Reset the back buffer to make sure the next update will redraw everything. + self.buffers[1 - self.current].reset(); + Ok(()) + } + + /// Queries the real size of the backend. + pub fn size(&self) -> io::Result<Rect> { + self.backend.size() + } +} diff --git a/helix-term/src/ui/editor.rs b/helix-term/src/ui/editor.rs new file mode 100644 index 00000000..ceb5a442 --- /dev/null +++ b/helix-term/src/ui/editor.rs @@ -0,0 +1,327 @@ +use crate::commands; +use crate::compositor::{Component, Compositor, Context, EventResult}; +use crate::keymap::{self, Keymaps}; +use crate::ui::text_color; + +use helix_core::{indent::TAB_WIDTH, syntax::HighlightEvent, Position, Range, State}; +use helix_view::{document::Mode, Document, Editor, Theme, View}; +use std::borrow::Cow; + +use crossterm::{ + cursor, + event::{read, Event, EventStream, KeyCode, KeyEvent}, +}; +use tui::{ + backend::CrosstermBackend, + buffer::Buffer as Surface, + layout::Rect, + style::{Color, Modifier, Style}, +}; + +pub struct EditorView { + keymap: Keymaps, +} + +const OFFSET: u16 = 7; // 1 diagnostic + 5 linenr + 1 gutter + +impl EditorView { + pub fn new() -> Self { + Self { + keymap: keymap::default(), + } + } + pub fn render_view( + &self, + view: &mut View, + viewport: Rect, + surface: &mut Surface, + theme: &Theme, + ) { + let area = Rect::new(OFFSET, 0, viewport.width - OFFSET, viewport.height - 2); // - 2 for statusline and prompt + self.render_buffer(view, area, surface, theme); + let area = Rect::new(0, viewport.height - 2, viewport.width, 1); + self.render_statusline(view, area, surface, theme); + } + + // TODO: ideally not &mut View but highlights require it because of cursor cache + pub fn render_buffer( + &self, + view: &mut View, + viewport: Rect, + surface: &mut Surface, + theme: &Theme, + ) { + // clear with background color + surface.set_style(viewport, theme.get("ui.background")); + + // TODO: inefficient, should feed chunks.iter() to tree_sitter.parse_with(|offset, pos|) + let source_code = view.doc.text().to_string(); + + let last_line = view.last_line(); + + let range = { + // calculate viewport byte ranges + let start = view.doc.text().line_to_byte(view.first_line); + let end = view.doc.text().line_to_byte(last_line) + + view.doc.text().line(last_line).len_bytes(); + + start..end + }; + + // TODO: range doesn't actually restrict source, just highlight range + // TODO: cache highlight results + // TODO: only recalculate when state.doc is actually modified + let highlights: Vec<_> = match view.doc.syntax.as_mut() { + Some(syntax) => { + syntax + .highlight_iter(source_code.as_bytes(), Some(range), None, |_| None) + .unwrap() + .collect() // TODO: we collect here to avoid double borrow, fix later + } + None => vec![Ok(HighlightEvent::Source { + start: range.start, + end: range.end, + })], + }; + let mut spans = Vec::new(); + let mut visual_x = 0; + let mut line = 0u16; + let visible_selections: Vec<Range> = view + .doc + .state + .selection() + .ranges() + .iter() + // TODO: limit selection to one in viewport + // .filter(|range| !range.is_empty()) // && range.overlaps(&Range::new(start, end + 1)) + .copied() + .collect(); + + 'outer: for event in highlights { + match event.unwrap() { + HighlightEvent::HighlightStart(span) => { + spans.push(span); + } + HighlightEvent::HighlightEnd => { + spans.pop(); + } + HighlightEvent::Source { start, end } => { + // TODO: filter out spans out of viewport for now.. + + let start = view.doc.text().byte_to_char(start); + let end = view.doc.text().byte_to_char(end); // <-- index 744, len 743 + + let text = view.doc.text().slice(start..end); + + use helix_core::graphemes::{grapheme_width, RopeGraphemes}; + + let style = match spans.first() { + Some(span) => theme.get(theme.scopes()[span.0].as_str()), + None => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender + }; + + // TODO: we could render the text to a surface, then cache that, that + // way if only the selection/cursor changes we can copy from cache + // and paint the new cursor. + + let mut char_index = start; + + // iterate over range char by char + for grapheme in RopeGraphemes::new(&text) { + // TODO: track current char_index + + if grapheme == "\n" { + visual_x = 0; + line += 1; + + // TODO: with proper iter this shouldn't be necessary + if line >= viewport.height { + break 'outer; + } + } else if grapheme == "\t" { + visual_x += (TAB_WIDTH as u16); + } else { + // Cow will prevent allocations if span contained in a single slice + // which should really be the majority case + let grapheme = Cow::from(grapheme); + let width = grapheme_width(&grapheme) as u16; + + // TODO: this should really happen as an after pass + let style = if visible_selections + .iter() + .any(|range| range.contains(char_index)) + { + // cedar + style.clone().bg(Color::Rgb(128, 47, 0)) + } else { + style + }; + + let style = if visible_selections + .iter() + .any(|range| range.head == char_index) + { + style.clone().bg(Color::Rgb(255, 255, 255)) + } else { + style + }; + + // ugh, improve with a traverse method + // or interleave highlight spans with selection and diagnostic spans + let style = if view.doc.diagnostics.iter().any(|diagnostic| { + diagnostic.range.0 <= char_index && diagnostic.range.1 > char_index + }) { + style.clone().add_modifier(Modifier::UNDERLINED) + } else { + style + }; + + // TODO: paint cursor heads except primary + + surface.set_string( + viewport.x + visual_x, + viewport.y + line, + grapheme, + style, + ); + + visual_x += width; + } + + char_index += 1; + } + } + } + } + + let style: Style = theme.get("ui.linenr"); + let warning: Style = theme.get("warning"); + let last_line = view.last_line(); + for (i, line) in (view.first_line..last_line).enumerate() { + if view.doc.diagnostics.iter().any(|d| d.line == line) { + surface.set_stringn(0, i as u16, "●", 1, warning); + } + + surface.set_stringn(1, i as u16, format!("{:>5}", line + 1), 5, style); + } + } + + pub fn render_statusline( + &self, + view: &View, + viewport: Rect, + surface: &mut Surface, + theme: &Theme, + ) { + let text_color = text_color(); + let mode = match view.doc.mode() { + Mode::Insert => "INS", + Mode::Normal => "NOR", + Mode::Goto => "GOTO", + }; + // statusline + surface.set_style( + Rect::new(0, viewport.y, viewport.width, 1), + theme.get("ui.statusline"), + ); + surface.set_string(1, viewport.y, mode, text_color); + + if let Some(path) = view.doc.path() { + surface.set_string(6, viewport.y, path.to_string_lossy(), text_color); + } + + surface.set_string( + viewport.width - 10, + viewport.y, + format!("{}", view.doc.diagnostics.len()), + text_color, + ); + } +} + +impl Component for EditorView { + fn handle_event(&mut self, event: Event, cx: &mut Context) -> EventResult { + match event { + Event::Resize(width, height) => { + // TODO: simplistic ensure cursor in view for now + // TODO: loop over views + if let Some(view) = cx.editor.view_mut() { + view.size = (width, height); + view.ensure_cursor_in_view() + }; + EventResult::Consumed(None) + } + Event::Key(event) => { + if let Some(view) = cx.editor.view_mut() { + let keys = vec![event]; + // TODO: sequences (`gg`) + let mode = view.doc.mode(); + // TODO: handle count other than 1 + let mut cx = commands::Context { + view, + executor: cx.executor, + count: 1, + callback: None, + }; + + match mode { + Mode::Insert => { + if let Some(command) = self.keymap[&Mode::Insert].get(&keys) { + command(&mut cx); + } else if let KeyEvent { + code: KeyCode::Char(c), + .. + } = event + { + commands::insert::insert_char(&mut cx, c); + } + } + mode => { + if let Some(command) = self.keymap[&mode].get(&keys) { + command(&mut cx); + + // TODO: simplistic ensure cursor in view for now + } + } + } + // appease borrowck + let callback = cx.callback.take(); + + view.ensure_cursor_in_view(); + + EventResult::Consumed(callback) + } else { + EventResult::Ignored + } + } + Event::Mouse(_) => EventResult::Ignored, + } + } + + fn render(&self, area: Rect, surface: &mut Surface, cx: &mut Context) { + // SAFETY: we cheat around the view_mut() borrow because it doesn't allow us to also borrow + // theme. Theme is immutable mutating view won't disrupt theme_ref. + let theme_ref = unsafe { &*(&cx.editor.theme as *const Theme) }; + if let Some(view) = cx.editor.view_mut() { + self.render_view(view, area, surface, theme_ref); + } + + // TODO: drop unwrap + } + + fn cursor_position(&self, area: Rect, ctx: &mut Context) -> Option<Position> { + // match view.doc.mode() { + // Mode::Insert => write!(stdout, "\x1B[6 q"), + // mode => write!(stdout, "\x1B[2 q"), + // }; + let view = ctx.editor.view().unwrap(); + let cursor = view.doc.state.selection().cursor(); + + let mut pos = view + .screen_coords_at_pos(&view.doc.text().slice(..), cursor) + .expect("Cursor is out of bounds."); + pos.col += area.x as usize + OFFSET as usize; + pos.row += area.y as usize; + Some(pos) + } +} diff --git a/helix-term/src/ui/mod.rs b/helix-term/src/ui/mod.rs new file mode 100644 index 00000000..bc79e09c --- /dev/null +++ b/helix-term/src/ui/mod.rs @@ -0,0 +1,14 @@ +mod editor; +mod prompt; + +pub use editor::EditorView; +pub use prompt::Prompt; + +pub use tui::layout::Rect; +pub use tui::style::{Color, Modifier, Style}; + +// TODO: temp +#[inline(always)] +pub fn text_color() -> Style { + Style::default().fg(Color::Rgb(219, 191, 239)) // lilac +} diff --git a/helix-term/src/ui/prompt.rs b/helix-term/src/ui/prompt.rs new file mode 100644 index 00000000..ce00a129 --- /dev/null +++ b/helix-term/src/ui/prompt.rs @@ -0,0 +1,217 @@ +use crate::compositor::{Component, Compositor, Context, EventResult}; +use crossterm::event::{Event, KeyCode, KeyEvent, KeyModifiers}; +use helix_core::Position; +use helix_view::Editor; +use helix_view::Theme; +use std::string::String; + +pub struct Prompt { + pub prompt: String, + pub line: String, + pub cursor: usize, + pub completion: Vec<String>, + pub should_close: bool, + pub completion_selection_index: Option<usize>, + completion_fn: Box<dyn FnMut(&str) -> Vec<String>>, + callback_fn: Box<dyn FnMut(&mut Editor, &str)>, +} + +impl Prompt { + pub fn new( + prompt: String, + mut completion_fn: impl FnMut(&str) -> Vec<String> + 'static, + callback_fn: impl FnMut(&mut Editor, &str) + 'static, + ) -> Prompt { + Prompt { + prompt, + line: String::new(), + cursor: 0, + completion: completion_fn(""), + should_close: false, + completion_selection_index: None, + completion_fn: Box::new(completion_fn), + callback_fn: Box::new(callback_fn), + } + } + + pub fn insert_char(&mut self, c: char) { + self.line.insert(self.cursor, c); + self.cursor += 1; + self.completion = (self.completion_fn)(&self.line); + self.exit_selection(); + } + + pub fn move_char_left(&mut self) { + if self.cursor > 0 { + self.cursor -= 1; + } + } + + pub fn move_char_right(&mut self) { + if self.cursor < self.line.len() { + self.cursor += 1; + } + } + + pub fn move_start(&mut self) { + self.cursor = 0; + } + + pub fn move_end(&mut self) { + self.cursor = self.line.len(); + } + + pub fn delete_char_backwards(&mut self) { + if self.cursor > 0 { + self.line.remove(self.cursor - 1); + self.cursor -= 1; + self.completion = (self.completion_fn)(&self.line); + } + self.exit_selection(); + } + + pub fn change_completion_selection(&mut self) { + if self.completion.is_empty() { + return; + } + let index = + self.completion_selection_index.map(|i| i + 1).unwrap_or(0) % self.completion.len(); + self.completion_selection_index = Some(index); + self.line = self.completion[index].clone(); + } + pub fn exit_selection(&mut self) { + self.completion_selection_index = None; + } +} + +use tui::{ + buffer::Buffer as Surface, + layout::Rect, + style::{Color, Modifier, Style}, +}; + +const BASE_WIDTH: u16 = 30; +use crate::ui::text_color; + +impl Prompt { + pub fn render_prompt(&self, area: Rect, surface: &mut Surface, theme: &Theme) { + let text_color = text_color(); + // completion + if !self.completion.is_empty() { + // TODO: find out better way of clearing individual lines of the screen + let mut row = 0; + let mut col = 0; + let max_col = area.width / BASE_WIDTH; + let col_height = ((self.completion.len() as u16 + max_col - 1) / max_col); + + for i in (3..col_height + 3) { + surface.set_string( + 0, + area.height - i as u16, + " ".repeat(area.width as usize), + text_color, + ); + } + surface.set_style( + Rect::new(0, area.height - col_height - 2, area.width, col_height), + theme.get("ui.statusline"), + ); + for (i, command) in self.completion.iter().enumerate() { + let color = if self.completion_selection_index.is_some() + && i == self.completion_selection_index.unwrap() + { + Style::default().bg(Color::Rgb(104, 060, 232)) + } else { + text_color + }; + surface.set_stringn( + 1 + col * BASE_WIDTH, + area.height - col_height - 2 + row, + &command, + BASE_WIDTH as usize - 1, + color, + ); + row += 1; + if row > col_height - 1 { + row = 0; + col += 1; + } + if col > max_col { + break; + } + } + } + // render buffer text + surface.set_string(1, area.height - 1, &self.prompt, text_color); + surface.set_string(2, area.height - 1, &self.line, text_color); + } +} + +impl Component for Prompt { + fn handle_event(&mut self, event: Event, cx: &mut Context) -> EventResult { + let event = match event { + Event::Key(event) => event, + _ => return EventResult::Ignored, + }; + + match event { + KeyEvent { + code: KeyCode::Char(c), + modifiers: KeyModifiers::NONE, + } => self.insert_char(c), + KeyEvent { + code: KeyCode::Esc, .. + } => { + return EventResult::Consumed(Some(Box::new(|compositor: &mut Compositor| { + // remove the layer + compositor.pop(); + }))); + } + KeyEvent { + code: KeyCode::Right, + .. + } => self.move_char_right(), + KeyEvent { + code: KeyCode::Left, + .. + } => self.move_char_left(), + KeyEvent { + code: KeyCode::Char('e'), + modifiers: KeyModifiers::CONTROL, + } => self.move_end(), + KeyEvent { + code: KeyCode::Char('a'), + modifiers: KeyModifiers::CONTROL, + } => self.move_start(), + KeyEvent { + code: KeyCode::Backspace, + modifiers: KeyModifiers::NONE, + } => self.delete_char_backwards(), + KeyEvent { + code: KeyCode::Enter, + .. + } => (self.callback_fn)(cx.editor, &self.line), + KeyEvent { + code: KeyCode::Tab, .. + } => self.change_completion_selection(), + KeyEvent { + code: KeyCode::Char('q'), + modifiers: KeyModifiers::CONTROL, + } => self.exit_selection(), + _ => (), + }; + + EventResult::Consumed(None) + } + + fn render(&self, area: Rect, surface: &mut Surface, cx: &mut Context) { + self.render_prompt(area, surface, &cx.editor.theme) + } + + fn cursor_position(&self, area: Rect, ctx: &mut Context) -> Option<Position> { + Some(Position::new( + area.height as usize - 1, + area.x as usize + 2 + self.cursor, + )) + } +} |