use crate::{theme::Theme, tree::Tree, Document, DocumentId, View, ViewId}; use tui::layout::Rect; use std::path::PathBuf; use slotmap::SlotMap; use anyhow::Error; pub use helix_core::diagnostic::Severity; pub struct Editor { pub tree: Tree, pub documents: SlotMap, pub count: Option, pub theme: Theme, pub language_servers: helix_lsp::Registry, pub status_msg: Option<(String, Severity)>, } #[derive(Copy, Clone)] pub enum Action { Replace, HorizontalSplit, VerticalSplit, } impl Editor { pub fn new(mut area: tui::layout::Rect) -> Self { use helix_core::config_dir; let config = std::fs::read(config_dir().join("theme.toml")); // load $HOME/.config/helix/theme.toml, fallback to default config let toml = config .as_deref() .unwrap_or(include_bytes!("../../theme.toml")); let theme: Theme = toml::from_slice(toml).expect("failed to parse theme.toml"); let language_servers = helix_lsp::Registry::new(); // HAXX: offset the render area height by 1 to account for prompt/commandline area.height -= 1; Self { tree: Tree::new(area), documents: SlotMap::with_key(), count: None, theme, language_servers, status_msg: None, } } pub fn set_status(&mut self, status: String) { self.status_msg = Some((status, Severity::Info)); } pub fn set_error(&mut self, error: String) { self.status_msg = Some((error, Severity::Error)); } fn _refresh(&mut self) { for (view, _) in self.tree.views_mut() { let doc = &self.documents[view.doc]; view.ensure_cursor_in_view(doc) } } pub fn switch(&mut self, id: DocumentId, action: Action) { use crate::tree::Layout; use helix_core::Selection; match action { Action::Replace => { let view = self.view(); let jump = ( view.doc, self.documents[view.doc].selection(view.id).clone(), ); let view = self.view_mut(); view.jumps.push(jump); view.doc = id; view.first_line = 0; let (view, doc) = self.current(); // initialize selection for view let selection = doc .selections .entry(view.id) .or_insert_with(|| Selection::point(0)); // TODO: reuse align_view let pos = selection.cursor(); let line = doc.text().char_to_line(pos); view.first_line = line.saturating_sub(view.area.height as usize / 2); return; } Action::HorizontalSplit => { let view = View::new(id); let view_id = self.tree.split(view, Layout::Horizontal); // initialize selection for view let doc = &mut self.documents[id]; doc.selections.insert(view_id, Selection::point(0)); } Action::VerticalSplit => { let view = View::new(id); let view_id = self.tree.split(view, Layout::Vertical); // initialize selection for view let doc = &mut self.documents[id]; doc.selections.insert(view_id, Selection::point(0)); } } self._refresh(); } pub fn new_file(&mut self, action: Action) -> DocumentId { use helix_core::Rope; let doc = Document::new(Rope::from("\n")); let id = self.documents.insert(doc); self.documents[id].id = id; self.switch(id, action); id } pub fn open(&mut self, path: PathBuf, action: Action) -> Result { let path = std::fs::canonicalize(path)?; let id = self .documents() .find(|doc| doc.path() == Some(&path)) .map(|doc| doc.id); let id = if let Some(id) = id { id } else { let mut doc = Document::load(path, self.theme.scopes())?; // try to find a language server based on the language name let language_server = doc .language .as_ref() .and_then(|language| self.language_servers.get(language)); if let Some(language_server) = language_server { doc.set_language_server(Some(language_server.clone())); let language_id = doc .language() .and_then(|s| s.split('.').last()) // source.rust .map(ToOwned::to_owned) .unwrap_or_default(); tokio::spawn(language_server.text_document_did_open( doc.url().unwrap(), doc.version(), doc.text(), language_id, )); } let id = self.documents.insert(doc); self.documents[id].id = id; id }; self.switch(id, action); Ok(id) } pub fn close(&mut self, id: ViewId, close_buffer: bool) { let view = self.tree.get(self.tree.focus); // remove selection self.documents[view.doc].selections.remove(&id); if close_buffer { // get around borrowck issues let language_servers = &mut self.language_servers; let doc = &self.documents[view.doc]; let language_server = doc .language .as_ref() .and_then(|language| language_servers.get(language)); if let Some(language_server) = language_server { tokio::spawn(language_server.text_document_did_close(doc.identifier())); } self.documents.remove(view.doc); } self.tree.remove(id); self._refresh(); } pub fn resize(&mut self, area: Rect) { self.tree.resize(area); self._refresh(); } pub fn focus_next(&mut self) { self.tree.focus_next(); } pub fn should_close(&self) -> bool { self.tree.is_empty() } pub fn current(&mut self) -> (&mut View, &mut Document) { let view = self.tree.get_mut(self.tree.focus); let doc = &mut self.documents[view.doc]; (view, doc) } pub fn view(&self) -> &View { self.tree.get(self.tree.focus) } pub fn view_mut(&mut self) -> &mut View { self.tree.get_mut(self.tree.focus) } pub fn ensure_cursor_in_view(&mut self, id: ViewId) { let view = self.tree.get_mut(id); let doc = &self.documents[view.doc]; view.ensure_cursor_in_view(doc) } pub fn document(&self, id: DocumentId) -> Option<&Document> { self.documents.get(id) } pub fn documents(&self) -> impl Iterator { self.documents.iter().map(|(_id, doc)| doc) } // pub fn current_document(&self) -> Document { // let id = self.view().doc; // let doc = &mut editor.documents[id]; // } pub fn cursor_position(&self) -> Option { const OFFSET: u16 = 7; // 1 diagnostic + 5 linenr + 1 gutter let view = self.view(); let doc = &self.documents[view.doc]; let cursor = doc.selection(view.id).cursor(); if let Some(mut pos) = view.screen_coords_at_pos(doc, doc.text().slice(..), cursor) { pos.col += view.area.x as usize + OFFSET as usize; pos.row += view.area.y as usize; return Some(pos); } None } }