use helix_core::{ comment, coords_at_pos, find_first_non_whitespace_char, find_root, get_line_ending, graphemes, indent, match_brackets, movement::{self, Direction}, object, pos_at_coords, regex::{self, Regex}, register::{self, Register, Registers}, search, selection, Change, ChangeSet, LineEnding, Position, Range, Rope, RopeSlice, Selection, SmallVec, Tendril, Transaction, }; use helix_view::{ document::{IndentStyle, Mode}, input::{KeyCode, KeyEvent}, view::{View, PADDING}, Document, DocumentId, Editor, ViewId, }; use anyhow::anyhow; use helix_lsp::{ lsp, util::{lsp_pos_to_pos, lsp_range_to_range, pos_to_lsp_pos, range_to_lsp_range}, OffsetEncoding, }; use insert::*; use movement::Movement; use crate::{ compositor::{Callback, Component, Compositor}, ui::{self, Completion, Picker, Popup, Prompt, PromptEvent}, }; use crate::application::{LspCallbackWrapper, LspCallbacks}; use futures_util::FutureExt; use std::{fmt, future::Future, path::Display, str::FromStr}; use std::{ borrow::Cow, path::{Path, PathBuf}, }; use once_cell::sync::Lazy; use serde::de::{self, Deserialize, Deserializer}; pub struct Context<'a> { pub selected_register: helix_view::RegisterSelection, pub count: Option, pub editor: &'a mut Editor, pub callback: Option, pub on_next_key_callback: Option>, pub callbacks: &'a mut LspCallbacks, } impl<'a> Context<'a> { /// Push a new component onto the compositor. pub fn push_layer(&mut self, mut component: Box) { self.callback = Some(Box::new(|compositor: &mut Compositor| { compositor.push(component) })); } #[inline] pub fn on_next_key( &mut self, on_next_key_callback: impl FnOnce(&mut Context, KeyEvent) + 'static, ) { self.on_next_key_callback = Some(Box::new(on_next_key_callback)); } #[inline] pub fn callback( &mut self, call: impl Future> + 'static + Send, callback: F, ) where T: for<'de> serde::Deserialize<'de> + Send + 'static, F: FnOnce(&mut Editor, &mut Compositor, T) + Send + 'static, { let callback = Box::pin(async move { let json = call.await?; let response = serde_json::from_value(json)?; let call: LspCallbackWrapper = Box::new(move |editor: &mut Editor, compositor: &mut Compositor| { callback(editor, compositor, response) }); Ok(call) }); self.callbacks.push(callback); } /// Returns 1 if no explicit count was provided #[inline] pub fn count(&self) -> usize { self.count.map_or(1, |v| v.get()) } } enum Align { Top, Center, Bottom, } fn align_view(doc: &Document, view: &mut View, align: Align) { let pos = doc.selection(view.id).cursor(); let line = doc.text().char_to_line(pos); let relative = match align { Align::Center => view.area.height as usize / 2, Align::Top => 0, Align::Bottom => view.area.height as usize, }; view.first_line = line.saturating_sub(relative); } /// A command is composed of a static name, and a function that takes the current state plus a count, /// and does a side-effect on the state (usually by creating and applying a transaction). #[derive(Copy, Clone)] pub struct Command(&'static str, fn(cx: &mut Context)); macro_rules! commands { ( $($name:ident),* ) => { $( #[allow(non_upper_case_globals)] pub const $name: Self = Self(stringify!($name), $name); )* pub const COMMAND_LIST: &'static [Self] = &[ $( Self::$name, )* ]; } } impl Command { pub fn execute(&self, cx: &mut Context) { (self.1)(cx); } pub fn name(&self) -> &'static str { self.0 } commands!( move_char_left, move_char_right, move_line_up, move_line_down, move_line_end, move_line_start, move_first_nonwhitespace, move_next_word_start, move_prev_word_start, move_next_word_end, move_file_start, move_file_end, extend_next_word_start, extend_prev_word_start, extend_next_word_end, find_till_char, find_next_char, extend_till_char, extend_next_char, till_prev_char, find_prev_char, extend_till_prev_char, extend_prev_char, extend_first_nonwhitespace, replace, page_up, page_down, half_page_up, half_page_down, extend_char_left, extend_char_right, extend_line_up, extend_line_down, extend_line_end, extend_line_start, select_all, select_regex, split_selection, split_selection_on_newline, search, search_next, extend_search_next, search_selection, select_line, extend_line, delete_selection, change_selection, collapse_selection, flip_selections, insert_mode, append_mode, command_mode, file_picker, buffer_picker, symbol_picker, prepend_to_line, append_to_line, open_below, open_above, normal_mode, goto_mode, select_mode, exit_select_mode, goto_definition, goto_type_definition, goto_implementation, goto_reference, goto_first_diag, goto_last_diag, goto_next_diag, goto_prev_diag, signature_help, insert_tab, insert_newline, delete_char_backward, delete_char_forward, delete_word_backward, undo, redo, yank, replace_with_yanked, paste_after, paste_before, indent, unindent, format_selections, join_selections, keep_selections, keep_primary_selection, save, completion, hover, toggle_comments, expand_selection, match_brackets, jump_forward, jump_backward, window_mode, rotate_view, hsplit, vsplit, wclose, select_register, space_mode, view_mode, left_bracket_mode, right_bracket_mode ); } impl fmt::Debug for Command { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { let Command(name, _) = self; f.debug_tuple("Command").field(name).finish() } } impl fmt::Display for Command { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { let Command(name, _) = self; f.write_str(name) } } impl std::str::FromStr for Command { type Err = anyhow::Error; fn from_str(s: &str) -> Result { Command::COMMAND_LIST .iter() .copied() .find(|cmd| cmd.0 == s) .ok_or_else(|| anyhow!("No command named '{}'", s)) } } impl<'de> Deserialize<'de> for Command { fn deserialize(deserializer: D) -> Result where D: Deserializer<'de>, { let s = String::deserialize(deserializer)?; s.parse().map_err(de::Error::custom) } } impl PartialEq for Command { fn eq(&self, other: &Self) -> bool { self.name() == other.name() } } fn move_char_left(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|range| { movement::move_horizontally(text, range, Direction::Backward, count, Movement::Move) }); doc.set_selection(view.id, selection); } fn move_char_right(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|range| { movement::move_horizontally(text, range, Direction::Forward, count, Movement::Move) }); doc.set_selection(view.id, selection); } fn move_line_up(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|range| { movement::move_vertically(text, range, Direction::Backward, count, Movement::Move) }); doc.set_selection(view.id, selection); } fn move_line_down(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|range| { movement::move_vertically(text, range, Direction::Forward, count, Movement::Move) }); doc.set_selection(view.id, selection); } fn move_line_end(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id).transform(|range| { let text = doc.text(); let line = text.char_to_line(range.head); let pos = text.line_to_char(line + 1).saturating_sub( get_line_ending(&text.line(line)) .map(|le| le.len_chars()) .unwrap_or(0), ); Range::new(pos, pos) }); doc.set_selection(view.id, selection); } fn move_line_start(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id).transform(|range| { let text = doc.text(); let line = text.char_to_line(range.head); // adjust to start of the line let pos = text.line_to_char(line); Range::new(pos, pos) }); doc.set_selection(view.id, selection); } fn move_first_nonwhitespace(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id).transform(|range| { let text = doc.text(); let line_idx = text.char_to_line(range.head); if let Some(pos) = find_first_non_whitespace_char(text.line(line_idx)) { let pos = pos + text.line_to_char(line_idx); Range::new(pos, pos) } else { range } }); doc.set_selection(view.id, selection); } // TODO: move vs extend could take an extra type Extend/Move that would // Range::new(if Move { pos } if Extend { range.anchor }, pos) // since these all really do the same thing fn move_next_word_start(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc .selection(view.id) .transform(|range| movement::move_next_word_start(text, range, count)); doc.set_selection(view.id, selection); } fn move_prev_word_start(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc .selection(view.id) .transform(|range| movement::move_prev_word_start(text, range, count)); doc.set_selection(view.id, selection); } fn move_next_word_end(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc .selection(view.id) .transform(|range| movement::move_next_word_end(text, range, count)); doc.set_selection(view.id, selection); } fn move_file_start(cx: &mut Context) { push_jump(cx.editor); let (view, doc) = current!(cx.editor); doc.set_selection(view.id, Selection::point(0)); } fn move_file_end(cx: &mut Context) { push_jump(cx.editor); let (view, doc) = current!(cx.editor); let text = doc.text(); let last_line = text.line_to_char(text.len_lines().saturating_sub(2)); doc.set_selection(view.id, Selection::point(last_line)); } fn extend_next_word_start(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|mut range| { let word = movement::move_next_word_start(text, range, count); let pos = word.head; Range::new(range.anchor, pos) }); doc.set_selection(view.id, selection); } fn extend_prev_word_start(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|mut range| { let word = movement::move_prev_word_start(text, range, count); let pos = word.head; Range::new(range.anchor, pos) }); doc.set_selection(view.id, selection); } fn extend_next_word_end(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|mut range| { let word = movement::move_next_word_end(text, range, count); let pos = word.head; Range::new(range.anchor, pos) }); doc.set_selection(view.id, selection); } #[inline] fn find_char_impl(cx: &mut Context, search_fn: F, inclusive: bool, extend: bool) where // TODO: make an options struct for and abstract this Fn into a searcher type // use the definition for w/b/e too F: Fn(RopeSlice, char, usize, usize, bool) -> Option + 'static, { // TODO: count is reset to 1 before next key so we move it into the closure here. // Would be nice to carry over. let count = cx.count(); // need to wait for next key cx.on_next_key(move |cx, event| { let ch = match event { KeyEvent { code: KeyCode::Enter, .. } => '\n', KeyEvent { code: KeyCode::Char(ch), .. } => ch, _ => return, }; let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|mut range| { search_fn(text, ch, range.head, count, inclusive).map_or(range, |pos| { if extend { Range::new(range.anchor, pos) } else { // select Range::new(range.head, pos) } // or (pos, pos) to move to found val }) }); doc.set_selection(view.id, selection); }) } fn find_till_char(cx: &mut Context) { find_char_impl( cx, search::find_nth_next, false, /* inclusive */ false, /* extend */ ) } fn find_next_char(cx: &mut Context) { find_char_impl( cx, search::find_nth_next, true, /* inclusive */ false, /* extend */ ) } fn extend_till_char(cx: &mut Context) { find_char_impl( cx, search::find_nth_next, false, /* inclusive */ true, /* extend */ ) } fn extend_next_char(cx: &mut Context) { find_char_impl( cx, search::find_nth_next, true, /* inclusive */ true, /* extend */ ) } fn till_prev_char(cx: &mut Context) { find_char_impl( cx, search::find_nth_prev, false, /* inclusive */ false, /* extend */ ) } fn find_prev_char(cx: &mut Context) { find_char_impl( cx, search::find_nth_prev, true, /* inclusive */ false, /* extend */ ) } fn extend_till_prev_char(cx: &mut Context) { find_char_impl( cx, search::find_nth_prev, false, /* inclusive */ true, /* extend */ ) } fn extend_prev_char(cx: &mut Context) { find_char_impl( cx, search::find_nth_prev, true, /* inclusive */ true, /* extend */ ) } fn extend_first_nonwhitespace(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id).transform(|range| { let text = doc.text(); let line_idx = text.char_to_line(range.head); if let Some(pos) = find_first_non_whitespace_char(text.line(line_idx)) { let pos = pos + text.line_to_char(line_idx); Range::new(range.anchor, pos) } else { range } }); doc.set_selection(view.id, selection); } fn replace(cx: &mut Context) { // need to wait for next key cx.on_next_key(move |cx, event| { let ch = match event { KeyEvent { code: KeyCode::Char(ch), .. } => Some(ch), KeyEvent { code: KeyCode::Enter, .. } => Some('\n'), _ => None, }; if let Some(ch) = ch { let (view, doc) = current!(cx.editor); let transaction = Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| { let max_to = doc.text().len_chars().saturating_sub(1); let to = std::cmp::min(max_to, range.to() + 1); let text: String = doc .text() .slice(range.from()..to) .chars() .map(|c| if c == '\n' { '\n' } else { ch }) .collect(); (range.from(), to, Some(text.into())) }); doc.apply(&transaction, view.id); doc.append_changes_to_history(view.id); } }) } fn scroll(cx: &mut Context, offset: usize, direction: Direction) { use Direction::*; let (view, doc) = current!(cx.editor); let cursor = coords_at_pos(doc.text().slice(..), doc.selection(view.id).cursor()); let doc_last_line = doc.text().len_lines() - 1; let last_line = view.last_line(doc); if direction == Backward && view.first_line == 0 || direction == Forward && last_line == doc_last_line { return; } let scrolloff = PADDING.min(view.area.height as usize / 2); // TODO: user pref // cursor visual offset // TODO: only if dragging via mouse? // let cursor_off = cursor.row - view.first_line; view.first_line = match direction { Forward => view.first_line + offset, Backward => view.first_line.saturating_sub(offset), } .min(doc_last_line); // recalculate last line let last_line = view.last_line(doc); // clamp into viewport let line = cursor .row .max(view.first_line + scrolloff) .min(last_line.saturating_sub(scrolloff)); let text = doc.text().slice(..); let pos = pos_at_coords(text, Position::new(line, cursor.col)); // this func will properly truncate to line end // TODO: only manipulate main selection doc.set_selection(view.id, Selection::point(pos)); } fn page_up(cx: &mut Context) { let view = view!(cx.editor); let offset = view.area.height as usize; scroll(cx, offset, Direction::Backward); } fn page_down(cx: &mut Context) { let view = view!(cx.editor); let offset = view.area.height as usize; scroll(cx, offset, Direction::Forward); } fn half_page_up(cx: &mut Context) { let view = view!(cx.editor); let offset = view.area.height as usize / 2; scroll(cx, offset, Direction::Backward); } fn half_page_down(cx: &mut Context) { let view = view!(cx.editor); let offset = view.area.height as usize / 2; scroll(cx, offset, Direction::Forward); } fn extend_char_left(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|range| { movement::move_horizontally(text, range, Direction::Backward, count, Movement::Extend) }); doc.set_selection(view.id, selection); } fn extend_char_right(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|range| { movement::move_horizontally(text, range, Direction::Forward, count, Movement::Extend) }); doc.set_selection(view.id, selection); } fn extend_line_up(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|range| { movement::move_vertically(text, range, Direction::Backward, count, Movement::Extend) }); doc.set_selection(view.id, selection); } fn extend_line_down(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|range| { movement::move_vertically(text, range, Direction::Forward, count, Movement::Extend) }); doc.set_selection(view.id, selection); } fn extend_line_end(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id).transform(|range| { let text = doc.text(); let line = text.char_to_line(range.head); let pos = text.line_to_char(line + 1).saturating_sub( get_line_ending(&text.line(line)) .map(|le| le.len_chars()) .unwrap_or(0), ); Range::new(range.anchor, pos) }); doc.set_selection(view.id, selection); } fn extend_line_start(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id).transform(|range| { let text = doc.text(); let line = text.char_to_line(range.head); // adjust to start of the line let pos = text.line_to_char(line); Range::new(range.anchor, pos) }); doc.set_selection(view.id, selection); } fn select_all(cx: &mut Context) { let (view, doc) = current!(cx.editor); let end = doc.text().len_chars().saturating_sub(1); doc.set_selection(view.id, Selection::single(0, end)) } fn select_regex(cx: &mut Context) { let prompt = ui::regex_prompt(cx, "select:".to_string(), move |view, doc, _, regex| { let text = doc.text().slice(..); if let Some(selection) = selection::select_on_matches(text, doc.selection(view.id), ®ex) { doc.set_selection(view.id, selection); } }); cx.push_layer(Box::new(prompt)); } fn split_selection(cx: &mut Context) { let prompt = ui::regex_prompt(cx, "split:".to_string(), move |view, doc, _, regex| { let text = doc.text().slice(..); let selection = selection::split_on_matches(text, doc.selection(view.id), ®ex); doc.set_selection(view.id, selection); }); cx.push_layer(Box::new(prompt)); } fn split_selection_on_newline(cx: &mut Context) { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); // only compile the regex once #[allow(clippy::trivial_regex)] static REGEX: Lazy = Lazy::new(|| Regex::new(r"\n").unwrap()); let selection = selection::split_on_matches(text, doc.selection(view.id), ®EX); doc.set_selection(view.id, selection); } // search: searches for the first occurence in file, provides a prompt // search_next: reuses the last search regex and searches for the next match. The next match becomes the main selection. // -> we always search from after the cursor.head // TODO: be able to use selection as search query (*/alt *) // I'd probably collect all the matches right now and store the current index. The cache needs // wiping if input happens. fn search_impl(doc: &mut Document, view: &mut View, contents: &str, regex: &Regex, extend: bool) { let text = doc.text(); let selection = doc.selection(view.id); let start = text.char_to_byte(selection.cursor()); // use find_at to find the next match after the cursor, loop around the end // Careful, `Regex` uses `bytes` as offsets, not character indices! let mat = regex .find_at(contents, start) .or_else(|| regex.find(contents)); // TODO: message on wraparound if let Some(mat) = mat { let start = text.byte_to_char(mat.start()); let end = text.byte_to_char(mat.end()); if end == 0 { // skip empty matches that don't make sense return; } let head = end - 1; let selection = if extend { selection.clone().push(Range::new(start, head)) } else { Selection::single(start, head) }; // TODO: (first_match, regex) stuff in register? doc.set_selection(view.id, selection); align_view(doc, view, Align::Center); }; } // TODO: use one function for search vs extend fn search(cx: &mut Context) { let (view, doc) = current!(cx.editor); // TODO: could probably share with select_on_matches? // HAXX: sadly we can't avoid allocating a single string for the whole buffer since we can't // feed chunks into the regex yet let contents = doc.text().slice(..).to_string(); let view_id = view.id; let prompt = ui::regex_prompt( cx, "search:".to_string(), move |view, doc, registers, regex| { search_impl(doc, view, &contents, ®ex, false); // TODO: only store on enter (accept), not update registers.write('\\', vec![regex.as_str().to_string()]); }, ); cx.push_layer(Box::new(prompt)); } fn search_next_impl(cx: &mut Context, extend: bool) { let (view, doc) = current!(cx.editor); let registers = &mut cx.editor.registers; if let Some(query) = registers.read('\\') { let query = query.first().unwrap(); let contents = doc.text().slice(..).to_string(); let regex = Regex::new(query).unwrap(); search_impl(doc, view, &contents, ®ex, extend); } } fn search_next(cx: &mut Context) { search_next_impl(cx, false); } fn extend_search_next(cx: &mut Context) { search_next_impl(cx, true); } fn search_selection(cx: &mut Context) { let (view, doc) = current!(cx.editor); let contents = doc.text().slice(..); let query = doc.selection(view.id).primary().fragment(contents); let regex = regex::escape(&query); cx.editor.registers.write('\\', vec![regex]); search_next(cx); } // TODO: N -> search_prev // need to loop around buffer also and show a message // same for no matches // fn select_line(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let pos = doc.selection(view.id).primary(); let text = doc.text(); let line = text.char_to_line(pos.head); let start = text.line_to_char(line); let end = text .line_to_char(std::cmp::min(doc.text().len_lines(), line + count)) .saturating_sub(1); doc.set_selection(view.id, Selection::single(start, end)); } fn extend_line(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let pos = doc.selection(view.id).primary(); let text = doc.text(); let line_start = text.char_to_line(pos.anchor); let mut line = text.char_to_line(pos.head); let line_end = text.line_to_char(line + 1).saturating_sub(1); if line_start <= pos.anchor && pos.head == line_end && line != text.len_lines() { line += 1; } let start = text.line_to_char(line_start); let end = text.line_to_char(line + 1).saturating_sub(1); doc.set_selection(view.id, Selection::single(start, end)); } // heuristic: append changes to history after each command, unless we're in insert mode fn delete_selection_impl(reg: &mut Register, doc: &mut Document, view_id: ViewId) { // first yank the selection let values: Vec = doc .selection(view_id) .fragments(doc.text().slice(..)) .map(Cow::into_owned) .collect(); reg.write(values); // then delete let transaction = Transaction::change_by_selection(doc.text(), doc.selection(view_id), |range| { let max_to = doc.text().len_chars().saturating_sub(1); let to = std::cmp::min(max_to, range.to() + 1); (range.from(), to, None) }); doc.apply(&transaction, view_id); } fn delete_selection(cx: &mut Context) { let reg_name = cx.selected_register.name(); let (view, doc) = current!(cx.editor); let registers = &mut cx.editor.registers; let reg = registers.get_or_insert(reg_name); delete_selection_impl(reg, doc, view.id); doc.append_changes_to_history(view.id); // exit select mode, if currently in select mode exit_select_mode(cx); } fn change_selection(cx: &mut Context) { let reg_name = cx.selected_register.name(); let (view, doc) = current!(cx.editor); let registers = &mut cx.editor.registers; let reg = registers.get_or_insert(reg_name); delete_selection_impl(reg, doc, view.id); enter_insert_mode(doc); } fn collapse_selection(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc .selection(view.id) .transform(|range| Range::new(range.head, range.head)); doc.set_selection(view.id, selection); } fn flip_selections(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc .selection(view.id) .transform(|range| Range::new(range.head, range.anchor)); doc.set_selection(view.id, selection); } fn enter_insert_mode(doc: &mut Document) { doc.mode = Mode::Insert; } // inserts at the start of each selection fn insert_mode(cx: &mut Context) { let (view, doc) = current!(cx.editor); enter_insert_mode(doc); let selection = doc .selection(view.id) .transform(|range| Range::new(range.to(), range.from())); doc.set_selection(view.id, selection); } // inserts at the end of each selection fn append_mode(cx: &mut Context) { let (view, doc) = current!(cx.editor); enter_insert_mode(doc); doc.restore_cursor = true; let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|range| { Range::new( range.from(), graphemes::next_grapheme_boundary(text, range.to()), // to() + next char ) }); let end = text.len_chars(); if selection.iter().any(|range| range.head == end) { let transaction = Transaction::change( doc.text(), std::array::IntoIter::new([(end, end, Some(doc.line_ending().as_str().into()))]), ); doc.apply(&transaction, view.id); } doc.set_selection(view.id, selection); } mod cmd { use super::*; use std::collections::HashMap; use helix_view::editor::Action; use ui::completers::{self, Completer}; #[derive(Clone)] pub struct TypableCommand { pub name: &'static str, pub alias: Option<&'static str>, pub doc: &'static str, // params, flags, helper, completer pub fun: fn(&mut Editor, &[&str], PromptEvent), pub completer: Option, } fn quit(editor: &mut Editor, args: &[&str], event: PromptEvent) { // last view and we have unsaved changes if editor.tree.views().count() == 1 && buffers_remaining_impl(editor) { return; } editor.close(view!(editor).id, /* close_buffer */ false); } fn force_quit(editor: &mut Editor, args: &[&str], event: PromptEvent) { editor.close(view!(editor).id, /* close_buffer */ false); } fn open(editor: &mut Editor, args: &[&str], event: PromptEvent) { match args.get(0) { Some(path) => { // TODO: handle error editor.open(path.into(), Action::Replace); } None => { editor.set_error("wrong argument count".to_string()); } }; } fn write_impl>( view: &View, doc: &mut Document, path: Option

, ) -> Result<(), anyhow::Error> { use anyhow::anyhow; if let Some(path) = path { if let Err(err) = doc.set_path(path.as_ref()) { return Err(anyhow!("invalid filepath: {}", err)); }; } if doc.path().is_none() { return Err(anyhow!("cannot write a buffer without a filename")); } let autofmt = doc .language_config() .map(|config| config.auto_format) .unwrap_or_default(); if autofmt { doc.format(view.id); // TODO: merge into save } helix_lsp::block_on(doc.save()); Ok(()) } fn write(editor: &mut Editor, args: &[&str], event: PromptEvent) { let (view, doc) = current!(editor); if let Err(e) = write_impl(view, doc, args.first()) { editor.set_error(e.to_string()); }; } fn new_file(editor: &mut Editor, args: &[&str], event: PromptEvent) { editor.new_file(Action::Replace); } fn format(editor: &mut Editor, args: &[&str], event: PromptEvent) { let (view, doc) = current!(editor); doc.format(view.id) } fn set_indent_style(editor: &mut Editor, args: &[&str], event: PromptEvent) { use IndentStyle::*; // If no argument, report current indent style. if args.is_empty() { let style = current!(editor).1.indent_style; editor.set_status(match style { Tabs => "tabs".into(), Spaces(1) => "1 space".into(), Spaces(n) if (2..=8).contains(&n) => format!("{} spaces", n), _ => "error".into(), // Shouldn't happen. }); return; } // Attempt to parse argument as an indent style. let style = match args.get(0) { Some(arg) if "tabs".starts_with(&arg.to_lowercase()) => Some(Tabs), Some(&"0") => Some(Tabs), Some(arg) => arg .parse::() .ok() .filter(|n| (1..=8).contains(n)) .map(Spaces), _ => None, }; if let Some(s) = style { let doc = doc_mut!(editor); doc.indent_style = s; } else { // Invalid argument. editor.set_error(format!("invalid indent style '{}'", args[0],)); } } fn earlier(editor: &mut Editor, args: &[&str], event: PromptEvent) { let uk = match args.join(" ").parse::() { Ok(uk) => uk, Err(msg) => { editor.set_error(msg); return; } }; let (view, doc) = current!(editor); doc.earlier(view.id, uk) } fn later(editor: &mut Editor, args: &[&str], event: PromptEvent) { let uk = match args.join(" ").parse::() { Ok(uk) => uk, Err(msg) => { editor.set_error(msg); return; } }; let (view, doc) = current!(editor); doc.later(view.id, uk) } fn write_quit(editor: &mut Editor, args: &[&str], event: PromptEvent) { let (view, doc) = current!(editor); if let Err(e) = write_impl(view, doc, args.first()) { editor.set_error(e.to_string()); return; }; quit(editor, &[], event) } fn force_write_quit(editor: &mut Editor, args: &[&str], event: PromptEvent) { write(editor, args, event); force_quit(editor, &[], event); } /// Returns `true` if there are modified buffers remaining and sets editor error, /// otherwise returns `false` fn buffers_remaining_impl(editor: &mut Editor) -> bool { let modified: Vec<_> = editor .documents() .filter(|doc| doc.is_modified()) .map(|doc| { doc.relative_path() .map(|path| path.to_string_lossy().to_string()) .unwrap_or_else(|| "[scratch]".into()) }) .collect(); if !modified.is_empty() { let err = format!( "{} unsaved buffer(s) remaining: {:?}", modified.len(), modified ); editor.set_error(err); true } else { false } } fn write_all_impl( editor: &mut Editor, args: &[&str], event: PromptEvent, quit: bool, force: bool, ) { let mut errors = String::new(); // save all documents for (id, mut doc) in &mut editor.documents { if doc.path().is_none() { errors.push_str("cannot write a buffer without a filename\n"); continue; } helix_lsp::block_on(doc.save()); } editor.set_error(errors); if quit { if !force && buffers_remaining_impl(editor) { return; } // close all views let views: Vec<_> = editor.tree.views().map(|(view, _)| view.id).collect(); for view_id in views { editor.close(view_id, false); } } } fn write_all(editor: &mut Editor, args: &[&str], event: PromptEvent) { write_all_impl(editor, args, event, false, false) } fn write_all_quit(editor: &mut Editor, args: &[&str], event: PromptEvent) { write_all_impl(editor, args, event, true, false) } fn force_write_all_quit(editor: &mut Editor, args: &[&str], event: PromptEvent) { write_all_impl(editor, args, event, true, true) } fn quit_all_impl(editor: &mut Editor, args: &[&str], event: PromptEvent, force: bool) { if !force && buffers_remaining_impl(editor) { return; } // close all views let views: Vec<_> = editor.tree.views().map(|(view, _)| view.id).collect(); for view_id in views { editor.close(view_id, false); } } fn quit_all(editor: &mut Editor, args: &[&str], event: PromptEvent) { quit_all_impl(editor, args, event, false) } fn force_quit_all(editor: &mut Editor, args: &[&str], event: PromptEvent) { quit_all_impl(editor, args, event, true) } pub const TYPABLE_COMMAND_LIST: &[TypableCommand] = &[ TypableCommand { name: "quit", alias: Some("q"), doc: "Close the current view.", fun: quit, completer: None, }, TypableCommand { name: "quit!", alias: Some("q!"), doc: "Close the current view.", fun: force_quit, completer: None, }, TypableCommand { name: "open", alias: Some("o"), doc: "Open a file from disk into the current view.", fun: open, completer: Some(completers::filename), }, TypableCommand { name: "write", alias: Some("w"), doc: "Write changes to disk. Accepts an optional path (:write some/path.txt)", fun: write, completer: Some(completers::filename), }, TypableCommand { name: "new", alias: Some("n"), doc: "Create a new scratch buffer.", fun: new_file, completer: Some(completers::filename), }, TypableCommand { name: "format", alias: Some("fmt"), doc: "Format the file using a formatter.", fun: format, completer: None, }, TypableCommand { name: "indent-style", alias: None, doc: "Set the indentation style for editing. ('t' for tabs or 1-8 for number of spaces.)", fun: set_indent_style, completer: None, }, TypableCommand { name: "earlier", alias: Some("ear"), doc: "Jump back to an earlier point in edit history. Accepts a number of steps or a time span.", fun: earlier, completer: None, }, TypableCommand { name: "later", alias: Some("lat"), doc: "Jump to a later point in edit history. Accepts a number of steps or a time span.", fun: later, completer: None, }, TypableCommand { name: "write-quit", alias: Some("wq"), doc: "Writes changes to disk and closes the current view. Accepts an optional path (:wq some/path.txt)", fun: write_quit, completer: Some(completers::filename), }, TypableCommand { name: "write-quit!", alias: Some("wq!"), doc: "Writes changes to disk and closes the current view forcefully. Accepts an optional path (:wq! some/path.txt)", fun: force_write_quit, completer: Some(completers::filename), }, TypableCommand { name: "write-all", alias: Some("wa"), doc: "Writes changes from all views to disk.", fun: write_all, completer: None, }, TypableCommand { name: "write-quit-all", alias: Some("wqa"), doc: "Writes changes from all views to disk and close all views.", fun: write_all_quit, completer: None, }, TypableCommand { name: "write-quit-all!", alias: Some("wqa!"), doc: "Writes changes from all views to disk and close all views forcefully (ignoring unsaved changes).", fun: force_write_all_quit, completer: None, }, TypableCommand { name: "quit-all", alias: Some("qa"), doc: "Close all views.", fun: quit_all, completer: None, }, TypableCommand { name: "quit-all!", alias: Some("qa!"), doc: "Close all views forcefully (ignoring unsaved changes).", fun: force_quit_all, completer: None, }, ]; pub static COMMANDS: Lazy> = Lazy::new(|| { let mut map = HashMap::new(); for cmd in TYPABLE_COMMAND_LIST { map.insert(cmd.name, cmd); if let Some(alias) = cmd.alias { map.insert(alias, cmd); } } map }); } fn command_mode(cx: &mut Context) { // TODO: completion items should have a info section that would get displayed in // a popup above the prompt when items are tabbed over let mut prompt = Prompt::new( ":".to_owned(), |input: &str| { // we use .this over split_whitespace() because we care about empty segments let parts = input.split(' ').collect::>(); // simple heuristic: if there's no just one part, complete command name. // if there's a space, per command completion kicks in. if parts.len() <= 1 { use std::{borrow::Cow, ops::Range}; let end = 0..; cmd::TYPABLE_COMMAND_LIST .iter() .filter(|command| command.name.contains(input)) .map(|command| (end.clone(), Cow::Borrowed(command.name))) .collect() } else { let part = parts.last().unwrap(); if let Some(cmd::TypableCommand { completer: Some(completer), .. }) = cmd::COMMANDS.get(parts[0]) { completer(part) .into_iter() .map(|(range, file)| { // offset ranges to input let offset = input.len() - part.len(); let range = (range.start + offset)..; (range, file) }) .collect() } else { Vec::new() } } }, // completion move |editor: &mut Editor, input: &str, event: PromptEvent| { use helix_view::editor::Action; if event != PromptEvent::Validate { return; } let parts = input.split_whitespace().collect::>(); if parts.is_empty() { return; } if let Some(cmd) = cmd::COMMANDS.get(parts[0]) { (cmd.fun)(editor, &parts[1..], event); } else { editor.set_error(format!("no such command: '{}'", parts[0])); }; }, ); prompt.doc_fn = Box::new(|input: &str| { let part = input.split(' ').next().unwrap_or_default(); if let Some(cmd::TypableCommand { doc, .. }) = cmd::COMMANDS.get(part) { return Some(doc); } None }); cx.push_layer(Box::new(prompt)); } fn file_picker(cx: &mut Context) { let root = find_root(None).unwrap_or_else(|| PathBuf::from("./")); let picker = ui::file_picker(root); cx.push_layer(Box::new(picker)); } fn buffer_picker(cx: &mut Context) { use std::path::{Path, PathBuf}; let current = view!(cx.editor).doc; let picker = Picker::new( cx.editor .documents .iter() .map(|(id, doc)| (id, doc.relative_path())) .collect(), move |(id, path): &(DocumentId, Option)| { // format_fn match path.as_ref().and_then(|path| path.to_str()) { Some(path) => { if *id == current { format!("{} (*)", path).into() } else { path.into() } } None => "[scratch buffer]".into(), } }, |editor: &mut Editor, (id, _path): &(DocumentId, Option), _action| { use helix_view::editor::Action; editor.switch(*id, Action::Replace); }, ); cx.push_layer(Box::new(picker)); } fn symbol_picker(cx: &mut Context) { fn nested_to_flat( list: &mut Vec, file: &lsp::TextDocumentIdentifier, symbol: lsp::DocumentSymbol, ) { #[allow(deprecated)] list.push(lsp::SymbolInformation { name: symbol.name, kind: symbol.kind, tags: symbol.tags, deprecated: symbol.deprecated, location: lsp::Location::new(file.uri.clone(), symbol.selection_range), container_name: None, }); for child in symbol.children.into_iter().flatten() { nested_to_flat(list, file, child); } } let (view, doc) = current!(cx.editor); let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; let offset_encoding = language_server.offset_encoding(); let future = language_server.document_symbols(doc.identifier()); cx.callback( future, move |editor: &mut Editor, compositor: &mut Compositor, response: Option| { if let Some(symbols) = response { // lsp has two ways to represent symbols (flat/nested) // convert the nested variant to flat, so that we have a homogeneous list let symbols = match symbols { lsp::DocumentSymbolResponse::Flat(symbols) => symbols, lsp::DocumentSymbolResponse::Nested(symbols) => { let (_view, doc) = current!(editor); let mut flat_symbols = Vec::new(); for symbol in symbols { nested_to_flat(&mut flat_symbols, &doc.identifier(), symbol) } flat_symbols } }; let picker = Picker::new( symbols, |symbol| (&symbol.name).into(), move |editor: &mut Editor, symbol, _action| { push_jump(editor); let (view, doc) = current!(editor); if let Some(range) = lsp_range_to_range(doc.text(), symbol.location.range, offset_encoding) { doc.set_selection(view.id, Selection::single(range.to(), range.from())); align_view(doc, view, Align::Center); } }, ); compositor.push(Box::new(picker)) } }, ) } // I inserts at the first nonwhitespace character of each line with a selection fn prepend_to_line(cx: &mut Context) { move_first_nonwhitespace(cx); let doc = doc_mut!(cx.editor); enter_insert_mode(doc); } // A inserts at the end of each line with a selection fn append_to_line(cx: &mut Context) { let (view, doc) = current!(cx.editor); enter_insert_mode(doc); let selection = doc.selection(view.id).transform(|range| { let text = doc.text(); let line = text.char_to_line(range.head); // we can't use line_to_char(line + 1) - 2 because the last line might not contain \n let pos = (text.line_to_char(line) + text.line(line).len_chars()).saturating_sub(1); Range::new(pos, pos) }); doc.set_selection(view.id, selection); } enum Open { Below, Above, } fn open(cx: &mut Context, open: Open) { let count = cx.count(); let (view, doc) = current!(cx.editor); enter_insert_mode(doc); let text = doc.text().slice(..); let contents = doc.text(); let selection = doc.selection(view.id); let mut ranges = SmallVec::with_capacity(selection.len()); let mut offs = 0; let mut transaction = Transaction::change_by_selection(contents, selection, |range| { let line = text.char_to_line(range.head); let line = match open { // adjust position to the end of the line (next line - 1) Open::Below => line + 1, // adjust position to the end of the previous line (current line - 1) Open::Above => line, }; // insert newlines after this index for both Above and Below variants let linend_index = doc.text().line_to_char(line).saturating_sub(1); // TODO: share logic with insert_newline for indentation let indent_level = indent::suggested_indent_for_pos( doc.language_config(), doc.syntax(), text, linend_index, true, ); let indent = doc.indent_unit().repeat(indent_level); let indent_len = indent.len(); let mut text = String::with_capacity(1 + indent_len); text.push('\n'); text.push_str(&indent); let text = text.repeat(count); // calculate new selection ranges let pos = if line == 0 { 0 // Required since text will have a min len of 1 (\n) } else { offs + linend_index + 1 }; for i in 0..count { // pos -> beginning of reference line, // + (i * (1+indent_len)) -> beginning of i'th line from pos // + indent_len -> -> indent for i'th line ranges.push(Range::point(pos + (i * (1 + indent_len)) + indent_len)); } offs += text.chars().count(); (linend_index, linend_index, Some(text.into())) }); transaction = transaction.with_selection(Selection::new(ranges, selection.primary_index())); doc.apply(&transaction, view.id); } // o inserts a new line after each line with a selection fn open_below(cx: &mut Context) { open(cx, Open::Below) } // O inserts a new line before each line with a selection fn open_above(cx: &mut Context) { open(cx, Open::Above) } fn normal_mode(cx: &mut Context) { let (view, doc) = current!(cx.editor); doc.mode = Mode::Normal; doc.append_changes_to_history(view.id); // if leaving append mode, move cursor back by 1 if doc.restore_cursor { let text = doc.text().slice(..); let selection = doc.selection(view.id).transform(|range| { Range::new( range.from(), graphemes::prev_grapheme_boundary(text, range.to()), ) }); doc.set_selection(view.id, selection); doc.restore_cursor = false; } } // Store a jump on the jumplist. fn push_jump(editor: &mut Editor) { let (view, doc) = current!(editor); let jump = (doc.id(), doc.selection(view.id).clone()); view.jumps.push(jump); } fn switch_to_last_accessed_file(cx: &mut Context) { let alternate_file = view!(cx.editor).last_accessed_doc; if let Some(alt) = alternate_file { cx.editor.switch(alt, Action::Replace); } else { cx.editor.set_error("no last accessed buffer".to_owned()) } } fn goto_mode(cx: &mut Context) { if let Some(count) = cx.count { push_jump(cx.editor); let (view, doc) = current!(cx.editor); let line_idx = std::cmp::min(count.get() - 1, doc.text().len_lines().saturating_sub(2)); let pos = doc.text().line_to_char(line_idx); doc.set_selection(view.id, Selection::point(pos)); return; } cx.on_next_key(move |cx, event| { if let KeyEvent { code: KeyCode::Char(ch), .. } = event { // TODO: temporarily show GOTO in the mode list let doc = doc_mut!(cx.editor); match (doc.mode, ch) { (_, 'g') => move_file_start(cx), (_, 'e') => move_file_end(cx), (_, 'a') => switch_to_last_accessed_file(cx), (Mode::Normal, 'h') => move_line_start(cx), (Mode::Normal, 'l') => move_line_end(cx), (Mode::Select, 'h') => extend_line_start(cx), (Mode::Select, 'l') => extend_line_end(cx), (_, 'd') => goto_definition(cx), (_, 'y') => goto_type_definition(cx), (_, 'r') => goto_reference(cx), (_, 'i') => goto_implementation(cx), (Mode::Normal, 's') => move_first_nonwhitespace(cx), (Mode::Select, 's') => extend_first_nonwhitespace(cx), (_, 't') | (_, 'm') | (_, 'b') => { let (view, doc) = current!(cx.editor); let pos = doc.selection(view.id).cursor(); let line = doc.text().char_to_line(pos); let scrolloff = PADDING.min(view.area.height as usize / 2); // TODO: user pref let last_line = view.last_line(doc); let line = match ch { 't' => (view.first_line + scrolloff), 'm' => (view.first_line + (view.area.height as usize / 2)), 'b' => last_line.saturating_sub(scrolloff), _ => unreachable!(), } .min(last_line.saturating_sub(scrolloff)); let pos = doc.text().line_to_char(line); doc.set_selection(view.id, Selection::point(pos)); } _ => (), } } }) } fn select_mode(cx: &mut Context) { doc_mut!(cx.editor).mode = Mode::Select; } fn exit_select_mode(cx: &mut Context) { doc_mut!(cx.editor).mode = Mode::Normal; } fn goto_impl( editor: &mut Editor, compositor: &mut Compositor, locations: Vec, offset_encoding: OffsetEncoding, ) { use helix_view::editor::Action; push_jump(editor); fn jump_to( editor: &mut Editor, location: &lsp::Location, offset_encoding: OffsetEncoding, action: Action, ) { let id = editor .open(PathBuf::from(location.uri.path()), action) .expect("editor.open failed"); let (view, doc) = current!(editor); let definition_pos = location.range.start; // TODO: convert inside server let new_pos = if let Some(new_pos) = lsp_pos_to_pos(doc.text(), definition_pos, offset_encoding) { new_pos } else { return; }; doc.set_selection(view.id, Selection::point(new_pos)); align_view(doc, view, Align::Center); } match locations.as_slice() { [location] => { jump_to(editor, location, offset_encoding, Action::Replace); } [] => { editor.set_error("No definition found.".to_string()); } _locations => { let mut picker = ui::Picker::new( locations, |location| { let file = location.uri.as_str(); let line = location.range.start.line; format!("{}:{}", file, line).into() }, move |editor: &mut Editor, location, action| { jump_to(editor, location, offset_encoding, action) }, ); compositor.push(Box::new(picker)); } } } fn goto_definition(cx: &mut Context) { let (view, doc) = current!(cx.editor); let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; let offset_encoding = language_server.offset_encoding(); let pos = pos_to_lsp_pos(doc.text(), doc.selection(view.id).cursor(), offset_encoding); // TODO: handle fails let future = language_server.goto_definition(doc.identifier(), pos, None); cx.callback( future, move |editor: &mut Editor, compositor: &mut Compositor, response: Option| { let items = match response { Some(lsp::GotoDefinitionResponse::Scalar(location)) => vec![location], Some(lsp::GotoDefinitionResponse::Array(locations)) => locations, Some(lsp::GotoDefinitionResponse::Link(locations)) => locations .into_iter() .map(|location_link| lsp::Location { uri: location_link.target_uri, range: location_link.target_range, }) .collect(), None => Vec::new(), }; goto_impl(editor, compositor, items, offset_encoding); }, ); } fn goto_type_definition(cx: &mut Context) { let (view, doc) = current!(cx.editor); let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; let offset_encoding = language_server.offset_encoding(); let pos = pos_to_lsp_pos(doc.text(), doc.selection(view.id).cursor(), offset_encoding); // TODO: handle fails let future = language_server.goto_type_definition(doc.identifier(), pos, None); cx.callback( future, move |editor: &mut Editor, compositor: &mut Compositor, response: Option| { let items = match response { Some(lsp::GotoDefinitionResponse::Scalar(location)) => vec![location], Some(lsp::GotoDefinitionResponse::Array(locations)) => locations, Some(lsp::GotoDefinitionResponse::Link(locations)) => locations .into_iter() .map(|location_link| lsp::Location { uri: location_link.target_uri, range: location_link.target_range, }) .collect(), None => Vec::new(), }; goto_impl(editor, compositor, items, offset_encoding); }, ); } fn goto_implementation(cx: &mut Context) { let (view, doc) = current!(cx.editor); let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; let offset_encoding = language_server.offset_encoding(); let pos = pos_to_lsp_pos(doc.text(), doc.selection(view.id).cursor(), offset_encoding); // TODO: handle fails let future = language_server.goto_implementation(doc.identifier(), pos, None); cx.callback( future, move |editor: &mut Editor, compositor: &mut Compositor, response: Option| { let items = match response { Some(lsp::GotoDefinitionResponse::Scalar(location)) => vec![location], Some(lsp::GotoDefinitionResponse::Array(locations)) => locations, Some(lsp::GotoDefinitionResponse::Link(locations)) => locations .into_iter() .map(|location_link| lsp::Location { uri: location_link.target_uri, range: location_link.target_range, }) .collect(), None => Vec::new(), }; goto_impl(editor, compositor, items, offset_encoding); }, ); } fn goto_reference(cx: &mut Context) { let (view, doc) = current!(cx.editor); let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; let offset_encoding = language_server.offset_encoding(); let pos = pos_to_lsp_pos(doc.text(), doc.selection(view.id).cursor(), offset_encoding); // TODO: handle fails let future = language_server.goto_reference(doc.identifier(), pos, None); cx.callback( future, move |editor: &mut Editor, compositor: &mut Compositor, items: Option>| { goto_impl( editor, compositor, items.unwrap_or_default(), offset_encoding, ); }, ); } fn goto_pos(editor: &mut Editor, pos: usize) { push_jump(editor); let (view, doc) = current!(editor); doc.set_selection(view.id, Selection::point(pos)); align_view(doc, view, Align::Center); } fn goto_first_diag(cx: &mut Context) { let editor = &mut cx.editor; let (view, doc) = current!(editor); let cursor_pos = doc.selection(view.id).cursor(); let diag = if let Some(diag) = doc.diagnostics().first() { diag.range.start } else { return; }; goto_pos(editor, diag); } fn goto_last_diag(cx: &mut Context) { let editor = &mut cx.editor; let (view, doc) = current!(editor); let cursor_pos = doc.selection(view.id).cursor(); let diag = if let Some(diag) = doc.diagnostics().last() { diag.range.start } else { return; }; goto_pos(editor, diag); } fn goto_next_diag(cx: &mut Context) { let editor = &mut cx.editor; let (view, doc) = current!(editor); let cursor_pos = doc.selection(view.id).cursor(); let diag = if let Some(diag) = doc .diagnostics() .iter() .map(|diag| diag.range.start) .find(|&pos| pos > cursor_pos) { diag } else if let Some(diag) = doc.diagnostics().first() { diag.range.start } else { return; }; goto_pos(editor, diag); } fn goto_prev_diag(cx: &mut Context) { let editor = &mut cx.editor; let (view, doc) = current!(editor); let cursor_pos = doc.selection(view.id).cursor(); let diag = if let Some(diag) = doc .diagnostics() .iter() .rev() .map(|diag| diag.range.start) .find(|&pos| pos < cursor_pos) { diag } else if let Some(diag) = doc.diagnostics().last() { diag.range.start } else { return; }; goto_pos(editor, diag); } fn signature_help(cx: &mut Context) { let (view, doc) = current!(cx.editor); let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; let pos = pos_to_lsp_pos( doc.text(), doc.selection(view.id).cursor(), language_server.offset_encoding(), ); // TODO: handle fails let future = language_server.text_document_signature_help(doc.identifier(), pos, None); cx.callback( future, move |editor: &mut Editor, compositor: &mut Compositor, response: Option| { if let Some(signature_help) = response { log::info!("{:?}", signature_help); // signatures // active_signature // active_parameter // render as: // signature // ---------- // doc // with active param highlighted } }, ); } // NOTE: Transactions in this module get appended to history when we switch back to normal mode. pub mod insert { use super::*; pub type Hook = fn(&Rope, &Selection, char) -> Option; pub type PostHook = fn(&mut Context, char); fn completion(cx: &mut Context, ch: char) { // if ch matches completion char, trigger completion let doc = doc_mut!(cx.editor); let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; let capabilities = language_server.capabilities(); if let lsp::ServerCapabilities { completion_provider: Some(lsp::CompletionOptions { trigger_characters: Some(triggers), .. }), .. } = capabilities { // TODO: what if trigger is multiple chars long let is_trigger = triggers.iter().any(|trigger| trigger.contains(ch)); if is_trigger { super::completion(cx); } } } fn signature_help(cx: &mut Context, ch: char) { // if ch matches signature_help char, trigger let doc = doc_mut!(cx.editor); let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; let capabilities = language_server.capabilities(); if let lsp::ServerCapabilities { signature_help_provider: Some(lsp::SignatureHelpOptions { trigger_characters: Some(triggers), // TODO: retrigger_characters .. }), .. } = capabilities { // TODO: what if trigger is multiple chars long let is_trigger = triggers.iter().any(|trigger| trigger.contains(ch)); if is_trigger { super::signature_help(cx); } } // SignatureHelp { // signatures: [ // SignatureInformation { // label: "fn open(&mut self, path: PathBuf, action: Action) -> Result", // documentation: None, // parameters: Some( // [ParameterInformation { label: Simple("path: PathBuf"), documentation: None }, // ParameterInformation { label: Simple("action: Action"), documentation: None }] // ), // active_parameter: Some(0) // } // ], // active_signature: None, active_parameter: Some(0) // } } // The default insert hook: simply insert the character #[allow(clippy::unnecessary_wraps)] // need to use Option<> because of the Hook signature fn insert(doc: &Rope, selection: &Selection, ch: char) -> Option { let t = Tendril::from_char(ch); let transaction = Transaction::insert(doc, selection, t); Some(transaction) } use helix_core::auto_pairs; const HOOKS: &[Hook] = &[auto_pairs::hook, insert]; const POST_HOOKS: &[PostHook] = &[completion, signature_help]; pub fn insert_char(cx: &mut Context, c: char) { let (view, doc) = current!(cx.editor); let text = doc.text(); let selection = doc.selection(view.id); // run through insert hooks, stopping on the first one that returns Some(t) for hook in HOOKS { if let Some(transaction) = hook(text, selection, c) { doc.apply(&transaction, view.id); break; } } // TODO: need a post insert hook too for certain triggers (autocomplete, signature help, etc) // this could also generically look at Transaction, but it's a bit annoying to look at // Operation instead of Change. for hook in POST_HOOKS { hook(cx, c); } } pub fn insert_tab(cx: &mut Context) { let (view, doc) = current!(cx.editor); // TODO: round out to nearest indentation level (for example a line with 3 spaces should // indent by one to reach 4 spaces). let indent = Tendril::from(doc.indent_unit()); let transaction = Transaction::insert(doc.text(), doc.selection(view.id), indent); doc.apply(&transaction, view.id); } pub fn insert_newline(cx: &mut Context) { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let contents = doc.text(); let selection = doc.selection(view.id); let mut ranges = SmallVec::with_capacity(selection.len()); // TODO: this is annoying, but we need to do it to properly calculate pos after edits let mut offs = 0; let mut transaction = Transaction::change_by_selection(contents, selection, |range| { let pos = range.head; let prev = if pos == 0 { ' ' } else { contents.char(pos - 1) }; let curr = contents.char(pos); // TODO: offset range.head by 1? when calculating? let indent_level = indent::suggested_indent_for_pos( doc.language_config(), doc.syntax(), text, pos.saturating_sub(1), true, ); let indent = doc.indent_unit().repeat(indent_level); let mut text = String::with_capacity(1 + indent.len()); text.push_str(doc.line_ending().as_str()); text.push_str(&indent); let head = pos + offs + text.chars().count(); // TODO: range replace or extend // range.replace(|range| range.is_empty(), head); -> fn extend if cond true, new head pos // can be used with cx.mode to do replace or extend on most changes ranges.push(Range::new( if range.is_empty() { head } else { range.anchor + offs }, head, )); // if between a bracket pair if helix_core::auto_pairs::PAIRS.contains(&(prev, curr)) { // another newline, indent the end bracket one level less let indent = doc.indent_unit().repeat(indent_level.saturating_sub(1)); text.push_str(doc.line_ending().as_str()); text.push_str(&indent); } offs += text.chars().count(); (pos, pos, Some(text.into())) }); transaction = transaction.with_selection(Selection::new(ranges, selection.primary_index())); // doc.apply(&transaction, view.id); } // TODO: handle indent-aware delete pub fn delete_char_backward(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let transaction = Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| { ( graphemes::nth_prev_grapheme_boundary(text, range.head, count), range.head, None, ) }); doc.apply(&transaction, view.id); } pub fn delete_char_forward(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let transaction = Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| { ( range.head, graphemes::nth_next_grapheme_boundary(text, range.head, count), None, ) }); doc.apply(&transaction, view.id); } pub fn delete_word_backward(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc .selection(view.id) .transform(|range| movement::move_prev_word_start(text, range, count)); doc.set_selection(view.id, selection); delete_selection(cx) } } // Undo / Redo // TODO: each command could simply return a Option, then the higher level handles // storing it? fn undo(cx: &mut Context) { let (view, doc) = current!(cx.editor); let view_id = view.id; doc.undo(view_id); } fn redo(cx: &mut Context) { let (view, doc) = current!(cx.editor); let view_id = view.id; doc.redo(view_id); } // Yank / Paste fn yank(cx: &mut Context) { // TODO: should selections be made end inclusive? let (view, doc) = current!(cx.editor); let values: Vec = doc .selection(view.id) .fragments(doc.text().slice(..)) .map(Cow::into_owned) .collect(); let msg = format!( "yanked {} selection(s) to register {}", values.len(), cx.selected_register.name() ); cx.editor .registers .write(cx.selected_register.name(), values); cx.editor.set_status(msg) } #[derive(Copy, Clone)] enum Paste { Before, After, } fn paste_impl( values: &[String], doc: &mut Document, view: &View, action: Paste, ) -> Option { let repeat = std::iter::repeat( values .last() .map(|value| Tendril::from_slice(value)) .unwrap(), ); // if any of values ends \n it's linewise paste let linewise = values .iter() .any(|value| value.ends_with(doc.line_ending().as_str())); let mut values = values.iter().cloned().map(Tendril::from).chain(repeat); let text = doc.text(); let transaction = Transaction::change_by_selection(text, doc.selection(view.id), |range| { let pos = match (action, linewise) { // paste linewise before (Paste::Before, true) => text.line_to_char(text.char_to_line(range.from())), // paste linewise after (Paste::After, true) => text.line_to_char(text.char_to_line(range.to()) + 1), // paste insert (Paste::Before, false) => range.from(), // paste append (Paste::After, false) => range.to() + 1, }; (pos, pos, Some(values.next().unwrap())) }); Some(transaction) } fn replace_with_yanked(cx: &mut Context) { let reg_name = cx.selected_register.name(); let (view, doc) = current!(cx.editor); let registers = &mut cx.editor.registers; if let Some(values) = registers.read(reg_name) { if let Some(yank) = values.first() { let transaction = Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| { let max_to = doc.text().len_chars().saturating_sub(1); let to = std::cmp::min(max_to, range.to() + 1); (range.from(), to, Some(yank.as_str().into())) }); doc.apply(&transaction, view.id); doc.append_changes_to_history(view.id); } } } // 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 fn paste_after(cx: &mut Context) { let reg_name = cx.selected_register.name(); let (view, doc) = current!(cx.editor); let registers = &mut cx.editor.registers; if let Some(transaction) = registers .read(reg_name) .and_then(|values| paste_impl(values, doc, view, Paste::After)) { doc.apply(&transaction, view.id); doc.append_changes_to_history(view.id); } } fn paste_before(cx: &mut Context) { let reg_name = cx.selected_register.name(); let (view, doc) = current!(cx.editor); let registers = &mut cx.editor.registers; if let Some(transaction) = registers .read(reg_name) .and_then(|values| paste_impl(values, doc, view, Paste::Before)) { doc.apply(&transaction, view.id); doc.append_changes_to_history(view.id); } } fn get_lines(doc: &Document, view_id: ViewId) -> Vec { let mut lines = Vec::new(); // Get all line numbers for range in doc.selection(view_id) { let start = doc.text().char_to_line(range.from()); let end = 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 } fn indent(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let lines = get_lines(doc, view.id); // Indent by one level let indent = Tendril::from(doc.indent_unit().repeat(count)); let transaction = Transaction::change( doc.text(), lines.into_iter().map(|line| { let pos = doc.text().line_to_char(line); (pos, pos, Some(indent.clone())) }), ); doc.apply(&transaction, view.id); doc.append_changes_to_history(view.id); } fn unindent(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let lines = get_lines(doc, view.id); let mut changes = Vec::with_capacity(lines.len()); let tab_width = doc.tab_width(); let indent_width = count * tab_width; for line_idx in lines { let line = doc.text().line(line_idx); let mut width = 0; let mut pos = 0; for ch in line.chars() { match ch { ' ' => width += 1, '\t' => width = (width / tab_width + 1) * tab_width, _ => break, } pos += 1; if width >= indent_width { break; } } // now delete from start to first non-blank if pos > 0 { let start = doc.text().line_to_char(line_idx); changes.push((start, start + pos, None)) } } let transaction = Transaction::change(doc.text(), changes.into_iter()); doc.apply(&transaction, view.id); doc.append_changes_to_history(view.id); } fn format_selections(cx: &mut Context) { let (view, doc) = current!(cx.editor); // via lsp if available // else via tree-sitter indentation calculations let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; let ranges: Vec = doc .selection(view.id) .iter() .map(|range| range_to_lsp_range(doc.text(), *range, language_server.offset_encoding())) .collect(); for range in ranges { let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; // TODO: handle fails // TODO: concurrent map // TODO: need to block to get the formatting // let edits = block_on(language_server.text_document_range_formatting( // doc.identifier(), // range, // lsp::FormattingOptions::default(), // )) // .unwrap_or_default(); // let transaction = helix_lsp::util::generate_transaction_from_edits( // doc.text(), // edits, // language_server.offset_encoding(), // ); // doc.apply(&transaction, view.id); } doc.append_changes_to_history(view.id); } fn join_selections(cx: &mut Context) { use movement::skip_while; let (view, doc) = current!(cx.editor); let text = doc.text(); let slice = doc.text().slice(..); let mut changes = Vec::new(); let fragment = Tendril::from(" "); for selection in doc.selection(view.id) { let start = text.char_to_line(selection.from()); let mut end = text.char_to_line(selection.to()); if start == end { end += 1 } let lines = start..end; changes.reserve(lines.len()); for line in lines { let mut start = text.line_to_char(line + 1).saturating_sub(1); let mut end = start + 1; end = skip_while(slice, end, |ch| matches!(ch, ' ' | '\t')).unwrap_or(end); // need to skip from start, not end let change = (start, end, Some(fragment.clone())); changes.push(change); } } changes.sort_unstable_by_key(|(from, _to, _text)| *from); changes.dedup(); // TODO: joining multiple empty lines should be replaced by a single space. // need to merge change ranges that touch let transaction = Transaction::change(doc.text(), changes.into_iter()); // TODO: select inserted spaces // .with_selection(selection); doc.apply(&transaction, view.id); doc.append_changes_to_history(view.id); } fn keep_selections(cx: &mut Context) { // keep selections matching regex let prompt = ui::regex_prompt(cx, "keep:".to_string(), move |view, doc, _, regex| { let text = doc.text().slice(..); if let Some(selection) = selection::keep_matches(text, doc.selection(view.id), ®ex) { doc.set_selection(view.id, selection); } }); cx.push_layer(Box::new(prompt)); } fn keep_primary_selection(cx: &mut Context) { let (view, doc) = current!(cx.editor); let range = doc.selection(view.id).primary(); let selection = Selection::single(range.anchor, range.head); doc.set_selection(view.id, selection); } // fn save(cx: &mut Context) { // Spawns an async task to actually do the saving. This way we prevent blocking. // TODO: handle save errors somehow? tokio::spawn(doc_mut!(cx.editor).save()); } fn completion(cx: &mut Context) { // trigger on trigger char, or if user calls it // (or on word char typing??) // after it's triggered, if response marked is_incomplete, update on every subsequent keypress // // lsp calls are done via a callback: it sends a request and doesn't block. // when we get the response similarly to notification, trigger a call to the completion popup // // language_server.completion(params, |cx: &mut Context, _meta, response| { // // called at response time // // compositor, lookup completion layer // // downcast dyn Component to Completion component // // emit response to completion (completion.complete/handle(response)) // }) // // typing after prompt opens: usually start offset is tracked and everything between // start_offset..cursor is replaced. For our purposes we could keep the start state (doc, // selection) and revert to them before applying. This needs to properly reset changes/history // though... // // company-mode does this by matching the prefix of the completion and removing it. // ignore isIncomplete for now // keep state while typing // the behavior should be, filter the menu based on input // if items returns empty at any point, remove the popup // if backspace past initial offset point, remove the popup // // debounce requests! // // need an idle timeout thing. // https://github.com/company-mode/company-mode/blob/master/company.el#L620-L622 // // "The idle delay in seconds until completion starts automatically. // The prefix still has to satisfy `company-minimum-prefix-length' before that // happens. The value of nil means no idle completion." let (view, doc) = current!(cx.editor); let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; let offset_encoding = language_server.offset_encoding(); let pos = pos_to_lsp_pos(doc.text(), doc.selection(view.id).cursor(), offset_encoding); // TODO: handle fails let future = language_server.completion(doc.identifier(), pos, None); let trigger_offset = doc.selection(view.id).cursor(); cx.callback( future, move |editor: &mut Editor, compositor: &mut Compositor, response: Option| { let items = match response { Some(lsp::CompletionResponse::Array(items)) => items, // TODO: do something with is_incomplete Some(lsp::CompletionResponse::List(lsp::CompletionList { is_incomplete: _is_incomplete, items, })) => items, None => Vec::new(), }; // TODO: if no completion, show some message or something if items.is_empty() { return; } use crate::compositor::AnyComponent; let size = compositor.size(); let ui = compositor .find(std::any::type_name::()) .unwrap(); if let Some(ui) = ui.as_any_mut().downcast_mut::() { ui.set_completion(items, offset_encoding, trigger_offset, size); }; }, ); // TODO: Server error: content modified // // TODO!: when iterating over items, show the docs in popup // // language server client needs to be accessible via a registry of some sort //} } fn hover(cx: &mut Context) { let (view, doc) = current!(cx.editor); let language_server = match doc.language_server() { Some(language_server) => language_server, None => return, }; // TODO: factor out a doc.position_identifier() that returns lsp::TextDocumentPositionIdentifier let pos = pos_to_lsp_pos( doc.text(), doc.selection(view.id).cursor(), language_server.offset_encoding(), ); // TODO: handle fails let future = language_server.text_document_hover(doc.identifier(), pos, None); cx.callback( future, move |editor: &mut Editor, compositor: &mut Compositor, response: Option| { if let Some(hover) = response { // hover.contents / .range <- used for visualizing let contents = match hover.contents { lsp::HoverContents::Scalar(contents) => { // markedstring(string/languagestring to be highlighted) // TODO log::error!("hover contents {:?}", contents); return; } lsp::HoverContents::Array(contents) => { log::error!("hover contents {:?}", contents); return; } // TODO: render markdown lsp::HoverContents::Markup(contents) => contents.value, }; // skip if contents empty let contents = ui::Markdown::new(contents); let mut popup = Popup::new(contents); compositor.push(Box::new(popup)); } }, ); } // comments fn toggle_comments(cx: &mut Context) { let (view, doc) = current!(cx.editor); let transaction = comment::toggle_line_comments(doc.text(), doc.selection(view.id)); doc.apply(&transaction, view.id); doc.append_changes_to_history(view.id); } // tree sitter node selection fn expand_selection(cx: &mut Context) { let (view, doc) = current!(cx.editor); if let Some(syntax) = doc.syntax() { let text = doc.text().slice(..); let selection = object::expand_selection(syntax, text, doc.selection(view.id)); doc.set_selection(view.id, selection); } } fn match_brackets(cx: &mut Context) { let (view, doc) = current!(cx.editor); if let Some(syntax) = doc.syntax() { let pos = doc.selection(view.id).cursor(); if let Some(pos) = match_brackets::find(syntax, doc.text(), pos) { let selection = Selection::point(pos); doc.set_selection(view.id, selection); }; } } // fn jump_forward(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); if let Some((id, selection)) = view.jumps.forward(count) { view.doc = *id; let selection = selection.clone(); let (view, doc) = current!(cx.editor); // refetch doc doc.set_selection(view.id, selection); align_view(doc, view, Align::Center); }; } fn jump_backward(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); if let Some((id, selection)) = view.jumps.backward(view.id, doc, count) { // manually set the alternate_file as we cannot use the Editor::switch function here. if view.doc != *id { view.last_accessed_doc = Some(view.doc) } view.doc = *id; let selection = selection.clone(); let (view, doc) = current!(cx.editor); // refetch doc doc.set_selection(view.id, selection); align_view(doc, view, Align::Center); }; } fn window_mode(cx: &mut Context) { cx.on_next_key(move |cx, event| { if let KeyEvent { code: KeyCode::Char(ch), .. } = event { match ch { 'w' => rotate_view(cx), 'h' => hsplit(cx), 'v' => vsplit(cx), 'q' => wclose(cx), _ => {} } } }) } fn rotate_view(cx: &mut Context) { cx.editor.focus_next() } // split helper, clear it later use helix_view::editor::Action; use self::cmd::TypableCommand; fn split(cx: &mut Context, action: Action) { use helix_view::editor::Action; let (view, doc) = current!(cx.editor); let id = doc.id(); let selection = doc.selection(view.id).clone(); let first_line = view.first_line; cx.editor.switch(id, action); // match the selection in the previous view let (view, doc) = current!(cx.editor); view.first_line = first_line; doc.set_selection(view.id, selection); } fn hsplit(cx: &mut Context) { split(cx, Action::HorizontalSplit); } fn vsplit(cx: &mut Context) { split(cx, Action::VerticalSplit); } fn wclose(cx: &mut Context) { let view_id = view!(cx.editor).id; // close current split cx.editor.close(view_id, /* close_buffer */ false); } fn select_register(cx: &mut Context) { cx.on_next_key(move |cx, event| { if let KeyEvent { code: KeyCode::Char(ch), .. } = event { cx.editor.selected_register.select(ch); } }) } fn space_mode(cx: &mut Context) { cx.on_next_key(move |cx, event| { if let KeyEvent { code: KeyCode::Char(ch), .. } = event { // TODO: temporarily show SPC in the mode list match ch { 'f' => file_picker(cx), 'b' => buffer_picker(cx), 's' => symbol_picker(cx), 'w' => window_mode(cx), // ' ' => toggle_alternate_buffer(cx), // TODO: temporary since space mode took its old key ' ' => keep_primary_selection(cx), _ => (), } } }) } fn view_mode(cx: &mut Context) { cx.on_next_key(move |cx, event| { if let KeyEvent { code: KeyCode::Char(ch), .. } = event { // if lock, call cx again // TODO: temporarily show VIE in the mode list match ch { // center 'z' | 'c' // top | 't' // bottom | 'b' => { let (view, doc) = current!(cx.editor); align_view(doc, view, match ch { 'z' | 'c' => Align::Center, 't' => Align::Top, 'b' => Align::Bottom, _ => unreachable!() }); } 'm' => { let (view, doc) = current!(cx.editor); let pos = doc.selection(view.id).cursor(); let pos = coords_at_pos(doc.text().slice(..), pos); const OFFSET: usize = 7; // gutters view.first_col = pos.col.saturating_sub(((view.area.width as usize).saturating_sub(OFFSET)) / 2); }, 'h' => (), 'j' => scroll(cx, 1, Direction::Forward), 'k' => scroll(cx, 1, Direction::Backward), 'l' => (), _ => (), } } }) } fn left_bracket_mode(cx: &mut Context) { cx.on_next_key(move |cx, event| { if let KeyEvent { code: KeyCode::Char(ch), .. } = event { match ch { 'd' => goto_prev_diag(cx), 'D' => goto_first_diag(cx), _ => (), } } }) } fn right_bracket_mode(cx: &mut Context) { cx.on_next_key(move |cx, event| { if let KeyEvent { code: KeyCode::Char(ch), .. } = event { match ch { 'd' => goto_next_diag(cx), 'D' => goto_last_diag(cx), _ => (), } } }) }