Starting point

src/nvim.rs

@@ -172,15 +172,24 @@ impl ModeInfo {
 #[derive(Debug)]
 pub struct NvimInitError {
     source: Box<error::Error>,
-    cmd: String,
+    cmd: Option<String>,
 }
 
 impl NvimInitError {
+    pub fn new_post_init<E>(error: E) -> NvimInitError
+        where E: Into<Box<error::Error>>
+    {
+        NvimInitError {
+            cmd: None,
+            source: error.into(),
+        }
+    }
+
     pub fn new<E>(cmd: &Command, error: E) -> NvimInitError
         where E: Into<Box<error::Error>>
     {
         NvimInitError {
-            cmd: format!("{:?}", cmd),
+            cmd: Some(format!("{:?}", cmd)),
             source: error.into(),
         }
     }
@@ -189,8 +198,8 @@ impl NvimInitError {
         format!("{}", self.source)
     }
 
-    pub fn cmd(&self) -> &str {
+    pub fn cmd(&self) -> Option<&String> {
-        &self.cmd
+        self.cmd.as_ref()
     }
 }
 
@@ -210,11 +219,9 @@ impl error::Error for NvimInitError {
     }
 }
 
-pub fn initialize(shell: Arc<UiMutex<shell::State>>,
+pub fn start(shell: Arc<UiMutex<shell::State>>,
-                  nvim_bin_path: Option<&String>,
+             nvim_bin_path: Option<&String>)
-                  cols: u64,
+             -> result::Result<Neovim, NvimInitError> {
-                  rows: u64)
-                  -> result::Result<Neovim, NvimInitError> {
     let mut cmd = if let Some(path) = nvim_bin_path {
         Command::new(path)
     } else {
@@ -250,15 +257,29 @@ pub fn initialize(shell: Arc<UiMutex<shell::State>>,
 
     nvim.session
         .start_event_loop_handler(NvimHandler::new(shell));
+
+    Ok(nvim)
+}
+
+pub fn post_start_init(nvim: &mut Neovim,
+                       open_path: Option<&String>,
+                       cols: u64,
+                       rows: u64)
+                       -> result::Result<(), NvimInitError> {
     let mut opts = UiAttachOptions::new();
     opts.set_popupmenu_external(false);
     opts.set_tabline_external(true);
     nvim.ui_attach(cols, rows, opts)
-        .map_err(|e| NvimInitError::new(&cmd, e))?;
+        .map_err(|e| NvimInitError::new_post_init(e))?;
     nvim.command("runtime! ginit.vim")
-        .map_err(|e| NvimInitError::new(&cmd, e))?;
+        .map_err(|e| NvimInitError::new_post_init(e))?;
 
-    Ok(nvim)
+    if let Some(path) = open_path {
+        nvim.command(&format!("e {}", path))
+            .map_err(|e| NvimInitError::new_post_init(e))?;
+    }
+
+    Ok(())
 }
 
 pub struct NvimHandler {
@@ -507,11 +528,19 @@ impl RepaintMode {
 
 enum NeovimClientWrapper {
     Uninitialized,
+    InitInProgress,
     Initialized(Neovim),
     Error,
 }
 
 impl NeovimClientWrapper {
+    pub fn is_uninitialized(&self) -> bool {
+        match *self {
+            NeovimClientWrapper::Uninitialized => true,
+            _ => false,
+        }
+    }
+
     pub fn is_initialized(&self) -> bool {
         match *self {
             NeovimClientWrapper::Initialized(_) => true,
@@ -529,6 +558,7 @@ impl NeovimClientWrapper {
     pub fn nvim(&self) -> &Neovim {
         match *self {
             NeovimClientWrapper::Initialized(ref nvim) => nvim,
+            NeovimClientWrapper::InitInProgress |
             NeovimClientWrapper::Uninitialized => panic!("Access to uninitialized neovim client"),
             NeovimClientWrapper::Error => {
                 panic!("Access to neovim client that is not started due to some error")
@@ -539,6 +569,7 @@ impl NeovimClientWrapper {
     pub fn nvim_mut(&mut self) -> &mut Neovim {
         match *self {
             NeovimClientWrapper::Initialized(ref mut nvim) => nvim,
+            NeovimClientWrapper::InitInProgress |
             NeovimClientWrapper::Uninitialized => panic!("Access to uninitialized neovim client"),
             NeovimClientWrapper::Error => {
                 panic!("Access to neovim client that is not started due to some error")
@@ -568,6 +599,10 @@ impl NeovimClient {
         self.nvim.is_initialized()
     }
 
+    pub fn is_uninitialized(&self) -> bool {
+        self.nvim.is_uninitialized()
+    }
+
     pub fn is_error(&self) -> bool {
         self.nvim.is_error()
     }

src/shell.rs

@@ -250,6 +250,7 @@ impl UiState {
     }
 }
 
+#[derive(Clone)]
 pub struct ShellOptions {
     nvim_bin_path: Option<String>,
     open_path: Option<String>,
@@ -545,46 +546,82 @@ fn gtk_draw(state_arc: &Arc<UiMutex<State>>, ctx: &cairo::Context) -> Inhibit {
     Inhibit(false)
 }
 
+fn init_nvim_async(state_arc: Arc<UiMutex<State>>,
+                   options: ShellOptions,
+                   cols: usize,
+                   rows: usize) {
+    // execute nvim
+    let mut nvim = match nvim::start(state_arc.clone(), options.nvim_bin_path.as_ref()) {
+        Ok(nvim) => nvim,
+        Err(err) => {
+            // TODO: process error //
+            return;
+        }
+    };
+
+    // add callback on session end
+    let guard = nvim.session.take_dispatch_guard();
+    let state_ref = state_arc.clone();
+    thread::spawn(move || {
+                      guard.join().expect("Can't join dispatch thread");
+
+                      idle_cb_call!(state_ref.detach_cb());
+                  });
+
+    // attach ui
+    let state_ref = state_arc.clone();
+    let mut post_init = Some(move || {
+        let mut nvim = nvim;
+        if let Err(err) = nvim::post_start_init(&mut nvim,
+                                                options.open_path.as_ref(),
+                                                cols as u64,
+                                                rows as u64) {
+            // TODO: process error //
+        }
+
+        let state = state_arc.borrow_mut();
+        state.nvim.borrow_mut().set_nvim(nvim);
+    });
+
+    glib::idle_add(move || {
+        let cl = post_init.take();
+        cl();
+        Continue(false)
+    });
+
+    //{
+    //Ok(nvim) => nvim,
+    //Err(err) => {
+    //nvim_client.set_error();
+    //state
+    //.error_area
+    //.show_nvim_start_error(&err.source(), err.cmd());
+
+    //let stack = state.stack.clone();
+    //gtk::idle_add(move || {
+    //stack.set_visible_child_name("Error");
+    //Continue(false)
+    //});
+
+    //return;
+    //}
+    //};
+
+
+
+    //nvim_client.set_nvim(nvim);
+}
 
 fn init_nvim(state_arc: &Arc<UiMutex<State>>) {
     let state = state_arc.borrow();
 
-    let mut nvim_client = state.nvim.borrow_mut();
+    if state.nvim.borrow().is_uninitialized() {
-    if !nvim_client.is_initialized() && !nvim_client.is_error() {
         let (cols, rows) = state.calc_nvim_size().unwrap();
-        let mut nvim = match nvim::initialize(state_arc.clone(),
-                                              state.options.nvim_bin_path.as_ref(),
-                                              cols as u64,
-                                              rows as u64) {
-            Ok(nvim) => nvim,
-            Err(err) => {
-                nvim_client.set_error();
-                state.error_area.show_nvim_start_error(&err.source(), err.cmd());
 
-                let stack = state.stack.clone();
+        let state_arc = state_arc.clone();
-                gtk::idle_add(move || {
+        let options = state.options.clone();
-                                  stack.set_visible_child_name("Error");
+        thread::spawn(move || { init_nvim_async(state_arc, options, cols, rows); });
-                                  Continue(false)
-                              });
 
-                return;
-            }
-        };
-
-        if let Some(ref path) = state.options.open_path {
-            nvim.command(&format!("e {}", path)).report_err(&mut nvim);
-        }
-
-        let guard = nvim.session.take_dispatch_guard();
-
-        let state_ref = state_arc.clone();
-        thread::spawn(move || {
-                          guard.join().expect("Can't join dispatch thread");
-
-                          idle_cb_call!(state_ref.detach_cb());
-                      });
-
-        nvim_client.set_nvim(nvim);
     }
 }
 
@@ -1008,7 +1045,8 @@ impl RedrawEvents for State {
 
     fn mode_info_set(&mut self,
                      cursor_style_enabled: bool,
-                     mode_info: Vec<nvim::ModeInfo>) -> RepaintMode {
+                     mode_info: Vec<nvim::ModeInfo>)
+                     -> RepaintMode {
         self.mode.set_info(cursor_style_enabled, mode_info);
         RepaintMode::Nothing
     }