settings system

src/bridge/events.rs

@@ -5,6 +5,8 @@ use std::convert::TryInto;
 use rmpv::Value;
 use skulpin::skia_safe::Color4f;
 
+use crate::editor::EDITOR;
+use crate::error_handling::ResultPanicExplanation;
 use crate::editor::{Colors, Style, CursorMode, CursorShape};
 
 #[derive(Debug, Clone)]
@@ -160,8 +162,7 @@ fn unpack_color(packed_color: u64) -> Color4f {
     }
 }
 
-fn extract_values<Arr: AsMut<[Value]>>(values: Vec<Value>, mut arr: Arr) -> Result<Arr>
-{
+fn extract_values<Arr: AsMut<[Value]>>(values: Vec<Value>, mut arr: Arr) -> Result<Arr> {
     let arr_ref = arr.as_mut();
 
     if values.len() != arr_ref.len() {
@@ -649,17 +650,16 @@ pub fn parse_redraw_event(event_value: Value) -> Result<Vec<RedrawEvent>> {
     Ok(parsed_events)
 }
 
-pub(in super) fn parse_neovim_event(event_name: &str, arguments: Vec<Value>) -> Result<Vec<RedrawEvent>> {
-    let mut resulting_events = Vec::new();
-    if event_name == "redraw" {
-        resulting_events.reserve(arguments.len());
-        for event in arguments {
-            resulting_events.append(&mut parse_redraw_event(event)?);
+pub(in super) fn handle_redraw_event_group(arguments: Vec<Value>) {
+    for events in arguments {
+        let parsed_events = parse_redraw_event(events)
+            .unwrap_or_explained_panic("Could not parse event from neovim");
+
+        for parsed_event in parsed_events {
+            let mut editor = EDITOR.lock();
+            editor.handle_redraw_event(parsed_event);
         }
-    } else {
-        println!("Unknown global event {}", event_name);
     }
-    Ok(resulting_events)
 }
 
 

src/bridge/handler.rs

@@ -2,11 +2,11 @@ use rmpv::Value;
 use nvim_rs::{Neovim, Handler, compat::tokio::Compat};
 use async_trait::async_trait;
 use tokio::process::ChildStdin;
+use tokio::task;
 use log::trace;
 
-use crate::error_handling::ResultPanicExplanation;
-use crate::editor::EDITOR;
-use super::events::parse_neovim_event;
+use crate::settings::SETTINGS;
+use super::events::handle_redraw_event_group;
 
 #[derive(Clone)]
 pub struct NeovimHandler();
@@ -17,11 +17,16 @@ impl Handler for NeovimHandler {
 
     async fn handle_notify(&self, event_name: String, arguments: Vec<Value>, _neovim: Neovim<Compat<ChildStdin>>) {
         trace!("Neovim notification: {:?}", &event_name);
-        let parsed_events = parse_neovim_event(&event_name, arguments)
-            .unwrap_or_explained_panic("Could not parse event from neovim");
-        for event in parsed_events {
-            let mut editor = EDITOR.lock();
-            editor.handle_redraw_event(event);
+        task::spawn_blocking(move || {
+            match event_name.as_ref() {
+                "redraw" => {
+                    handle_redraw_event_group(arguments);
+                },
+                "setting_changed" => {
+                    SETTINGS.handle_changed_notification(arguments);
+                },
+                _ => {}
             }
+        }).await.ok();
     }
 }

src/bridge/mod.rs

@@ -95,7 +95,6 @@ async fn start_process(mut receiver: UnboundedReceiver<UiCommand>) {
     info!("Neovim process attached");
 
     let nvim = Arc::new(nvim);
-
     let input_nvim = nvim.clone();
     tokio::spawn(async move {
         info!("UiCommand processor started");
@@ -117,6 +116,9 @@ async fn start_process(mut receiver: UnboundedReceiver<UiCommand>) {
         }
     });
 
+    SETTINGS.read_initial_values(&nvim).await;
+    SETTINGS.setup_changed_listeners(&nvim).await;
+
     nvim.set_option("lazyredraw", Value::Boolean(false)).await
         .ok();
 }

src/redraw_scheduler.rs

@@ -17,7 +17,6 @@ pub struct RedrawScheduler {
 
 impl RedrawScheduler {
     pub fn new() -> RedrawScheduler {
-
         RedrawScheduler { 
             frames_queued: AtomicU16::new(1),
             scheduled_frame: Mutex::new(None)
@@ -38,7 +37,7 @@ impl RedrawScheduler {
 
     pub fn queue_next_frame(&self) {
         trace!("Next frame queued");
-        let buffer_frames = SETTINGS.buffer_frames.load(Ordering::Relaxed);
+        let buffer_frames = SETTINGS.get("extra_buffer_frames").read_u16();
         self.frames_queued.store(buffer_frames, Ordering::Relaxed);
     }
 

src/settings.rs

@@ -1,19 +1,129 @@
-use std::sync::atomic::{AtomicBool, AtomicU16};
+use std::collections::HashMap;
+use std::sync::atomic::{AtomicBool, AtomicU16, Ordering};
+use std::convert::TryInto;
 
+use rmpv::Value;
+use nvim_rs::Neovim;
+use nvim_rs::compat::tokio::Compat;
 use flexi_logger::{Logger, Criterion, Naming, Cleanup};
+use tokio::process::ChildStdin;
+
+use crate::error_handling::ResultPanicExplanation;
 
 lazy_static! {
     pub static ref SETTINGS: Settings = Settings::new();
 }
 
+pub enum Setting {
+    Bool(AtomicBool),
+    U16(AtomicU16)
+}
+
+impl Setting {
+    fn new_bool(value: bool) -> Setting {
+        Setting::Bool(AtomicBool::new(value))
+    }
+
+    pub fn read_bool(&self) -> bool {
+        if let Setting::Bool(atomic_bool) = self {
+            atomic_bool.load(Ordering::Relaxed)
+        } else {
+            panic!("Could not read setting as bool");
+        }
+    }
+
+    fn new_u16(value: u16) -> Setting {
+        Setting::U16(AtomicU16::new(value))
+    }
+
+    pub fn read_u16(&self) -> u16 {
+        if let Setting::U16(atomic_u16) = self {
+            atomic_u16.load(Ordering::Relaxed)
+        } else {
+            panic!("Could not read setting as u16");
+        }
+    }
+
+    fn parse(&self, value: Value) {
+        match self {
+            Setting::Bool(atomic_bool) => {
+                if let Ok(value) = value.try_into() {
+                    let intermediate: u64 = value;
+                    atomic_bool.store(intermediate != 0, Ordering::Relaxed);
+                }
+            },
+            Setting::U16(atomic_u16) => {
+                if let Ok(value) = value.try_into() {
+                    let intermediate: u64 = value;
+                    atomic_u16.store(intermediate as u16, Ordering::Relaxed);
+                }
+            }
+        }
+    }
+
+    fn unparse(&self) -> Value {
+        match self {
+            Setting::Bool(atomic_bool) => {
+                let value = if atomic_bool.load(Ordering::Relaxed) {
+                    1
+                } else {
+                    0
+                };
+                Value::from(value)
+            },
+            Setting::U16(atomic_u16) => Value::from(atomic_u16.load(Ordering::Relaxed))
+        }
+    }
+}
+
 pub struct Settings {
     pub neovim_arguments: Vec<String>,
-    
-    pub no_idle: AtomicBool,
-    pub buffer_frames: AtomicU16
+    pub settings: HashMap<String, Setting>
 }
 
 impl Settings {
+    pub async fn read_initial_values(&self, nvim: &Neovim<Compat<ChildStdin>>) {
+        for (name, setting) in self.settings.iter() {
+            let variable_name = format!("g:neovide_{}", name.to_string());
+            if let Ok(value) = nvim.get_var(&variable_name).await {
+                setting.parse(value);
+            } else {
+                nvim.set_var(&variable_name, setting.unparse()).await.ok();
+            }
+        }
+    }
+
+    pub async fn setup_changed_listeners(&self, nvim: &Neovim<Compat<ChildStdin>>) {
+        for name in self.settings.keys() {
+            let name = name.to_string();
+            let vimscript = 
+                format!("function NeovideNotify{}Changed(d, k, z)\n", name) +
+               &format!("  call rpcnotify(1, \"setting_changed\", \"{}\", g:neovide_{})\n", name, name) +
+                        "endfunction\n" +
+               &format!("call dictwatcheradd(g:, \"neovide_{}\", \"NeovideNotify{}Changed\")", name, name);
+            nvim.exec(&vimscript, false).await
+                .unwrap_or_explained_panic(&format!("Could not setup setting notifier for {}", name));
+        }
+    }
+
+    pub fn handle_changed_notification(&self, arguments: Vec<Value>) {
+        let mut arguments = arguments.into_iter();
+        let (name, value) = (arguments.next().unwrap(), arguments.next().unwrap());
+        dbg!(&name, &value);
+
+        if let Some(setting) = name
+                .try_into()
+                .ok()
+                .as_ref()
+                .and_then(|name: &String| self.settings.get(name)) {
+            setting.parse(value);
+        }
+    }
+
+    pub fn get(&self, name: &str) -> &Setting {
+        self.settings.get(name).expect(&format!("Could not find option {}", name))
+    }
+
     pub fn new() -> Settings {
         let mut no_idle = false;
         let mut buffer_frames = 1;
@@ -37,10 +147,11 @@ impl Settings {
             }
         }).collect::<Vec<String>>();
 
-        Settings {
-            neovim_arguments,
-            no_idle: AtomicBool::new(no_idle),
-            buffer_frames: AtomicU16::new(buffer_frames),
-        }
+        let mut settings = HashMap::new();
+
+        settings.insert("no_idle".to_string(),  Setting::new_bool(no_idle));
+        settings.insert("extra_buffer_frames".to_string(), Setting::new_u16(buffer_frames));
+
+        Settings { neovim_arguments, settings }
     }
 }

src/window.rs

@@ -214,7 +214,7 @@ pub fn ui_loop() {
                     window.set_title(&title);
                 }
 
-                if REDRAW_SCHEDULER.should_draw() || SETTINGS.no_idle.load(Ordering::Relaxed) {
+                if REDRAW_SCHEDULER.should_draw() || SETTINGS.get("no_idle").read_bool() {
                     debug!("Render Triggered");
                     if skulpin_renderer.draw(&window, |canvas, coordinate_system_helper| {
                         if renderer.draw(canvas, coordinate_system_helper) {