142 lines
3.4 KiB
Rust
142 lines
3.4 KiB
Rust
use std::ops::{Deref, DerefMut};
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use std::cell::{Cell, RefCell, RefMut};
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use std::sync::{Arc, Mutex, MutexGuard};
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use neovim_lib::Neovim;
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#[derive(Clone, Copy, PartialEq)]
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enum NeovimClientState {
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Uninitialized,
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InitInProgress,
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Initialized,
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Error,
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}
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pub enum NeovimRef<'a> {
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SingleThreaded(RefMut<'a, Neovim>),
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MultiThreaded(MutexGuard<'a, Option<Neovim>>),
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}
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impl<'a> NeovimRef<'a> {
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fn from_nvim(nvim: RefMut<'a, Neovim>) -> Self {
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NeovimRef::SingleThreaded(nvim)
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}
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fn from_nvim_async(nvim_async: &'a NeovimClientAsync) -> Option<NeovimRef<'a>> {
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let guard = nvim_async.nvim.lock().unwrap();
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if guard.is_some() {
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Some(NeovimRef::MultiThreaded(guard))
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} else {
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None
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}
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}
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}
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impl<'a> Deref for NeovimRef<'a> {
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type Target = Neovim;
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fn deref(&self) -> &Neovim {
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match *self {
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NeovimRef::SingleThreaded(ref nvim) => &*nvim,
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NeovimRef::MultiThreaded(ref nvim) => (&*nvim).as_ref().unwrap(),
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}
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}
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}
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impl<'a> DerefMut for NeovimRef<'a> {
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fn deref_mut(&mut self) -> &mut Neovim {
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match *self {
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NeovimRef::SingleThreaded(ref mut nvim) => &mut *nvim,
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NeovimRef::MultiThreaded(ref mut nvim) => (&mut *nvim).as_mut().unwrap(),
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}
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}
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}
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pub struct NeovimClientAsync {
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nvim: Arc<Mutex<Option<Neovim>>>,
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}
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impl NeovimClientAsync {
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fn new() -> Self {
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NeovimClientAsync { nvim: Arc::new(Mutex::new(None)) }
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}
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pub fn borrow(&self) -> Option<NeovimRef> {
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NeovimRef::from_nvim_async(self)
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}
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}
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impl Clone for NeovimClientAsync {
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fn clone(&self) -> Self {
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NeovimClientAsync {
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nvim: self.nvim.clone()
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}
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}
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}
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pub struct NeovimClient {
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state: Cell<NeovimClientState>,
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nvim: RefCell<Option<Neovim>>,
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nvim_async: NeovimClientAsync,
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}
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impl NeovimClient {
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pub fn new() -> Self {
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NeovimClient {
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state: Cell::new(NeovimClientState::Uninitialized),
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nvim: RefCell::new(None),
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nvim_async: NeovimClientAsync::new(),
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}
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}
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pub fn async_to_sync(&self) {
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let mut lock = self.nvim_async
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.nvim
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.lock()
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.unwrap();
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let nvim = lock.take().unwrap();
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*self.nvim.borrow_mut() = Some(nvim);
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}
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pub fn set_nvim_async(&self, nvim: Neovim) -> NeovimClientAsync {
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*self.nvim_async.nvim.lock().unwrap() = Some(nvim);
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self.nvim_async.clone()
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}
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pub fn set_initialized(&self) {
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self.state.set(NeovimClientState::Initialized);
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}
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pub fn set_error(&self) {
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self.state.set(NeovimClientState::Error);
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}
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pub fn set_in_progress(&self) {
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self.state.set(NeovimClientState::InitInProgress);
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}
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pub fn is_initialized(&self) -> bool {
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self.state.get() == NeovimClientState::Initialized
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}
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pub fn is_uninitialized(&self) -> bool {
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self.state.get() == NeovimClientState::Uninitialized
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}
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pub fn is_initializing(&self) -> bool {
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self.state.get() == NeovimClientState::InitInProgress
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}
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pub fn nvim(&self) -> Option<NeovimRef> {
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let nvim = self.nvim.borrow_mut();
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if nvim.is_some() {
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Some(NeovimRef::from_nvim(
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RefMut::map(nvim, |n| n.as_mut().unwrap()),
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))
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} else {
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self.nvim_async.borrow()
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}
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}
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}
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