finish up cursor options

Cargo.lock

@@ -2425,6 +2425,7 @@ dependencies = [
  "num_cpus",
  "pin-project-lite",
  "signal-hook-registry",
+ "slab",
  "tokio-macros",
  "winapi 0.3.8",
 ]

Cargo.toml

@@ -20,7 +20,7 @@ rust-embed = { version = "5.2.0", features = ["debug-embed"] }
 image = "0.22.3"
 #nvim-rs = "0.1.0"
 nvim-rs = { git = "https://github.com/KillTheMule/nvim-rs", branch = "futures", features = [ "use_tokio" ] }
-tokio = { version = "0.2.9", features = [ "blocking", "process" ] }
+tokio = { version = "0.2.9", features = [ "blocking", "process", "time" ] }
 async-trait = "0.1.18"
 
 [build-dependencies]

src/main.rs

@@ -5,6 +5,7 @@ mod editor;
 mod window;
 mod renderer;
 mod error_handling;
+mod redraw_scheduler;
 
 #[macro_use] extern crate derive_new;
 #[macro_use] extern crate rust_embed;

src/redraw_scheduler.rs

@@ -0,0 +1,28 @@
+use std::sync::Arc;
+use std::time::Instant;
+
+use skulpin::winit::window::Window;
+use tokio::runtime::Runtime;
+use tokio::time::{Instant as TokioInstant, delay_until};
+
+pub struct RedrawScheduler {
+    runtime: Runtime,
+    window: Arc<Window>
+}
+
+impl RedrawScheduler {
+    pub fn new(window: &Arc<Window>) -> RedrawScheduler {
+        RedrawScheduler { 
+            runtime: Runtime::new().unwrap(),
+            window: window.clone()
+        }
+    }
+
+    pub fn schedule(&self, time: Instant) {
+        let window = self.window.clone();
+        self.runtime.spawn(async move {
+            delay_until(TokioInstant::from_std(time)).await;
+            window.request_redraw();
+        });
+    }
+}

src/renderer/cursor_renderer.rs

@@ -34,7 +34,7 @@ impl BlinkStatus {
         }
     }
 
-    pub fn update_status(&mut self, new_cursor: &Cursor) -> bool {
+    pub fn update_status(&mut self, new_cursor: &Cursor) -> (bool, Option<Instant>) {
         if self.previous_cursor.is_none() || new_cursor != self.previous_cursor.as_ref().unwrap() {
             self.previous_cursor = Some(new_cursor.clone());
             self.last_transition = Instant::now();
@@ -48,16 +48,16 @@ impl BlinkStatus {
         if new_cursor.blinkwait == Some(0) || 
             new_cursor.blinkoff == Some(0) ||
             new_cursor.blinkon == Some(0) {
-            return true;
+            return (true, None);
         }
 
         let delay = match self.state {
             BlinkState::Waiting => new_cursor.blinkwait,
             BlinkState::Off => new_cursor.blinkoff,
             BlinkState::On => new_cursor.blinkon
-        }.filter(|millis| millis > &0).map(Duration::from_millis);
+        }.filter(|millis| millis > &0).map(|millis| Duration::from_millis(millis));
 
-        if delay.map(|delay| Instant::now() - self.last_transition > delay).unwrap_or(false) {
+        if delay.map(|delay| self.last_transition + delay < Instant::now()).unwrap_or(false) {
             self.state = match self.state {
                 BlinkState::Waiting => BlinkState::On,
                 BlinkState::On => BlinkState::Off,
@@ -66,10 +66,17 @@ impl BlinkStatus {
             self.last_transition = Instant::now();
         }
 
-        match self.state {
-            BlinkState::Waiting | BlinkState::Off => false,
-            BlinkState::On => true
-        }
+        (
+            match self.state {
+                BlinkState::Waiting | BlinkState::Off => false,
+                BlinkState::On => true
+            }, 
+            (match self.state {
+                BlinkState::Waiting => new_cursor.blinkwait,
+                BlinkState::Off => new_cursor.blinkoff,
+                BlinkState::On => new_cursor.blinkon
+            }).map(|delay| self.last_transition + Duration::from_millis(delay))
+        )
     }
 }
 
@@ -166,8 +173,8 @@ impl CursorRenderer {
             font_width: f32, font_height: f32,
             paint: &mut Paint, editor: Arc<Mutex<Editor>>,
             shaper: &mut CachingShaper, fonts_lookup: &mut FontLookup,
-            canvas: &mut Canvas) -> bool {
-        let render = self.blink_status.update_status(&cursor);
+            canvas: &mut Canvas) -> (bool, Option<Instant>) {
+        let (render, scheduled_update) = self.blink_status.update_status(&cursor);
 
         self.previous_position = {
             let editor = editor.lock().unwrap();
@@ -233,6 +240,6 @@ impl CursorRenderer {
             canvas.restore();
         }
 
-        animating
+        (animating, scheduled_update)
     }
 }

src/renderer/mod.rs

@@ -1,4 +1,6 @@
 use std::sync::{Arc, Mutex};
+use std::time::Instant;
+
 use skulpin::CoordinateSystemHelper;
 use skulpin::skia_safe::{Canvas, Paint, Surface, Budgeted, Rect, colors};
 use skulpin::skia_safe::gpu::SurfaceOrigin;
@@ -19,7 +21,8 @@ const DEFAULT_FONT_SIZE: f32 = 14.0;
 #[derive(new)]
 pub struct DrawResult {
     pub is_animating: bool,
-    pub font_changed: bool
+    pub font_changed: bool,
+    pub scheduled_update: Option<Instant>
 }
 
 pub struct Renderer {
@@ -167,13 +170,13 @@ impl Renderer {
 
         self.surface = Some(surface);
 
-        let cursor_animating = self.cursor_renderer.draw(
+        let (cursor_animating, scheduled_cursor_update) = self.cursor_renderer.draw(
             cursor, &default_colors, 
             self.font_width, self.font_height, 
             &mut self.paint, self.editor.clone(),
             &mut self.shaper, &mut self.fonts_lookup,
             gpu_canvas);
 
-        DrawResult::new(draw_commands.len() > 0 || cursor_animating, font_changed)
+        DrawResult::new(draw_commands.len() > 0 || cursor_animating, font_changed, scheduled_cursor_update)
     }
 }

src/window.rs

@@ -10,9 +10,9 @@ use skulpin::winit::event_loop::{ControlFlow, EventLoop};
 use skulpin::winit::window::{Icon, WindowBuilder};
 
 use crate::editor::Editor;
-use crate::bridge::{construct_keybinding_string, Bridge};
+use crate::bridge::{construct_keybinding_string, Bridge, UiCommand};
 use crate::renderer::Renderer;
-use crate::bridge::UiCommand;
+use crate::redraw_scheduler::RedrawScheduler;
 
 #[derive(RustEmbed)]
 #[folder = "assets/"]
@@ -75,6 +75,7 @@ pub fn ui_loop(editor: Arc<Mutex<Editor>>, mut bridge: Bridge, initial_size: (u6
         editor.window = Some(window.clone());
     }
 
+    let redraw_scheduler = RedrawScheduler::new(&window);
     let mut live_frames = 0;
     let mut frame_start = Instant::now();
     event_loop.run(move |event, _window_target, control_flow| {
@@ -197,6 +198,10 @@ pub fn ui_loop(editor: Arc<Mutex<Editor>>, mut bridge: Bridge, initial_size: (u6
                     } else {
                         *control_flow = ControlFlow::Wait;
                     }
+
+                    if let Some(scheduled_update) = draw_result.scheduled_update {
+                        redraw_scheduler.schedule(scheduled_update);
+                    }
                 }) {
                     println!("Error during draw: {:?}", e);
                     *control_flow = ControlFlow::Exit