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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 struct Editor {
pub tree: Tree,
pub documents: SlotMap<DocumentId, Document>,
pub count: Option<usize>,
pub theme: Theme,
pub language_servers: helix_lsp::Registry,
pub executor: &'static smol::Executor<'static>,
}
pub enum Action {
Replace,
HorizontalSplit,
VerticalSplit,
}
impl Editor {
pub fn new(executor: &'static smol::Executor<'static>, mut area: tui::layout::Rect) -> Self {
// TODO: load from config dir
let toml = include_str!("../../theme.toml");
let theme: Theme = toml::from_str(&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,
executor,
}
}
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 open(&mut self, path: PathBuf, action: Action) -> Result<DocumentId, Error> {
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, self.executor));
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();
smol::block_on(language_server.text_document_did_open(
doc.url().unwrap(),
doc.version(),
doc.text(),
language_id,
))
.unwrap();
}
let id = self.documents.insert(doc);
self.documents[id].id = id;
id
};
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_id = view.id;
// initialize selection for view
let doc = &mut self.documents[id];
doc.selections.insert(view_id, Selection::point(0));
return Ok(id);
}
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();
Ok(id)
}
pub fn close(&mut self, id: ViewId) {
let view = self.tree.get(self.tree.focus);
// get around borrowck issues
let language_servers = &mut self.language_servers;
let executor = self.executor;
let doc = &self.documents[view.doc];
let language_server = doc
.language
.as_ref()
.and_then(|language| language_servers.get(language, executor));
if let Some(language_server) = language_server {
smol::block_on(language_server.text_document_did_close(doc.identifier())).unwrap();
}
// remove selection
self.documents[view.doc].selections.remove(&id);
// 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 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<Item = &Document> {
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<helix_core::Position> {
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
}
}
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