Add distance dependent animation length (#621)

* Add distance dependent animation length

* Fix for #117 cursor trails disabled when switching between modes an optionally when going to cmd line

Cargo.lock

@@ -1,7 +1,5 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
-
 [[package]]
 name = "ab_glyph_rasterizer"
 version = "0.1.4"

src/bridge/events.rs

@@ -114,7 +114,7 @@ pub enum WindowAnchor {
     SouthEast,
 }
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub enum EditorMode {
     // The set of modes reported will change in new versions of Nvim, for
     // instance more sub-modes and temporary states might be represented as

src/renderer/cursor_renderer/mod.rs

@@ -25,7 +25,9 @@ const STANDARD_CORNERS: &[(f32, f32); 4] = &[(-0.5, -0.5), (0.5, -0.5), (0.5, 0.
 pub struct CursorSettings {
     antialiasing: bool,
     animation_length: f32,
+    distance_length_adjust: bool,
     animate_in_insert_mode: bool,
+    animate_command_line: bool,
     trail_size: f32,
     vfx_mode: cursor_vfx::VfxMode,
     vfx_opacity: f32,
@@ -42,7 +44,9 @@ impl Default for CursorSettings {
             antialiasing: true,
             animation_length: 0.13,
             animate_in_insert_mode: true,
+            animate_command_line: true,
             trail_size: 0.7,
+            distance_length_adjust: false,
             vfx_mode: cursor_vfx::VfxMode::Disabled,
             vfx_opacity: 200.0,
             vfx_particle_lifetime: 1.2,
@@ -60,6 +64,7 @@ pub struct Corner {
     current_position: Point,
     relative_position: Point,
     previous_destination: Point,
+    length_multiplier: f32,
     t: f32,
 }
 
@@ -70,6 +75,7 @@ impl Corner {
             current_position: Point::new(0.0, 0.0),
             relative_position: Point::new(0.0, 0.0),
             previous_destination: Point::new(-1000.0, -1000.0),
+            length_multiplier: 1.0,
             t: 0.0,
         }
     }
@@ -86,6 +92,11 @@ impl Corner {
             self.t = 0.0;
             self.start_position = self.current_position;
             self.previous_destination = destination;
+            self.length_multiplier = if settings.distance_length_adjust {
+                (destination - self.current_position).length().log10()
+            } else {
+                1.0
+            }
         }
 
         // Check first if animation's over
@@ -135,7 +146,7 @@ impl Corner {
                     (1.0 - settings.trail_size).max(0.0).min(1.0),
                     -direction_alignment,
                 );
-            self.t = (self.t + corner_dt / settings.animation_length).min(1.0)
+            self.t = (self.t + corner_dt / (settings.animation_length * self.length_multiplier)).min(1.0)
         }
 
         self.current_position = ease_point(
@@ -155,6 +166,7 @@ pub struct CursorRenderer {
     destination: Point,
     blink_status: BlinkStatus,
     previous_cursor_shape: Option<CursorShape>,
+    previous_editor_mode: EditorMode,
     cursor_vfx: Option<Box<dyn cursor_vfx::CursorVfx>>,
     previous_vfx_mode: cursor_vfx::VfxMode,
 }
@@ -167,6 +179,7 @@ impl CursorRenderer {
             destination: (0.0, 0.0).into(),
             blink_status: BlinkStatus::new(),
             previous_cursor_shape: None,
+            previous_editor_mode: EditorMode::Normal,
             cursor_vfx: None,
             previous_vfx_mode: cursor_vfx::VfxMode::Disabled,
         };
@@ -213,10 +226,12 @@ impl CursorRenderer {
         font_width: f32,
         font_height: f32,
         windows: &HashMap<u64, RenderedWindow>,
+        current_mode: &EditorMode,
     ) {
         let (cursor_grid_x, cursor_grid_y) = self.cursor.grid_position;
 
         if let Some(window) = windows.get(&self.cursor.parent_window_id) {
+            if cursor_grid_y < window.grid_height-1 || matches!(current_mode, EditorMode::CmdLine) {
                 let grid_x = cursor_grid_x as f32 + window.grid_current_position.x;
                 let mut grid_y = cursor_grid_y as f32 + window.grid_current_position.y
                     - (window.current_scroll - window.current_surfaces.top_line);
@@ -229,6 +244,7 @@ impl CursorRenderer {
                     .min(window.grid_current_position.y + window.grid_height as f32 - 1.0);
 
                 self.destination = (grid_x * font_width, grid_y * font_height).into();
+            }
         } else {
             self.destination = (
                 cursor_grid_x as f32 * font_width,
@@ -269,6 +285,8 @@ impl CursorRenderer {
         let font_dimensions: Point = (font_width, font_height).into();
 
         let in_insert_mode = matches!(current_mode, EditorMode::Insert);
+        let changed_to_from_cmdline = !matches!(self.previous_editor_mode, EditorMode::CmdLine) 
+                                      ^ matches!(current_mode, EditorMode::CmdLine);
 
         let center_destination = self.destination + font_dimensions * 0.5;
         let new_cursor = Some(self.cursor.shape.clone());
@@ -296,7 +314,8 @@ impl CursorRenderer {
                     font_dimensions,
                     center_destination,
                     dt,
-                    !settings.animate_in_insert_mode && in_insert_mode,
+                    !settings.animate_in_insert_mode && in_insert_mode 
+                    || !settings.animate_command_line && !changed_to_from_cmdline,
                 );
 
                 animating |= corner_animating;
@@ -313,6 +332,8 @@ impl CursorRenderer {
 
         if animating {
             REDRAW_SCHEDULER.queue_next_frame();
+        } else {
+            self.previous_editor_mode = current_mode.clone();
         }
 
         if self.cursor.enabled && render {

src/renderer/mod.rs

@@ -342,7 +342,7 @@ impl Renderer {
 
         let windows = &self.rendered_windows;
         self.cursor_renderer
-            .update_cursor_destination(font_width, font_height, windows);
+            .update_cursor_destination(font_width, font_height, windows, &self.current_mode);
 
         self.cursor_renderer.draw(
             &self.default_style.colors,