horizontal scrolling and progress toward command line

src/editor/command_line.rs

@@ -28,6 +28,7 @@ impl CommandLine {
 
     pub fn draw(&self, window_size: (u64, u64), defined_styles: &HashMap<u64, Style>) -> Vec<DrawCommand> {
         let mut draw_commands = Vec::new();
+        if self.visible {
             if self.content.len() > 0 {
                 let (width, height) = window_size;
                 let text_length: usize = self.content.iter().map(|(_, text)| text.len()).sum();
@@ -49,6 +50,7 @@ impl CommandLine {
                 }).collect::<Vec<DrawCommand>>();
                 draw_commands.append(&mut commands);
             }
+        }
         draw_commands
     }
 

src/editor/mod.rs

@@ -23,6 +23,20 @@ pub struct DrawCommand {
     pub scale: u16
 }
 
+impl DrawCommand {
+    pub fn set_coverage(&self, dirty: &mut Vec<Vec<bool>>) {
+        let (left, top) = self.grid_position;
+        let text_width = self.text.chars().count() * self.scale as usize;
+
+        for y in top..(top + self.scale as u64 - 1) {
+            let row = &mut dirty[y as usize];
+            for x in left..(left + text_width as u64 - 1) {
+                row[x as usize] = true;
+            }
+        }
+    }
+}
+
 pub struct Editor {
     pub grid: Vec<Vec<GridCell>>,
     pub dirty: Vec<Vec<bool>>,
@@ -136,6 +150,9 @@ impl Editor {
         }).collect::<Vec<DrawCommand>>();
 
         let mut command_line_draw_commands = self.command_line.draw(self.size, &self.defined_styles);
+        for command_line_draw_command in command_line_draw_commands.iter() {
+            command_line_draw_command.set_coverage(&mut self.dirty);
+        }
         draw_commands.append(&mut command_line_draw_commands);
 
         let (width, height) = self.size;

src/renderer/caching_shaper.rs

@@ -3,7 +3,7 @@ use skulpin::skia_safe::{Shaper, TextBlob, Font, Point};
 
 pub struct CachingShaper {
     shaper: Shaper,
-    cache: LruCache<String, TextBlob>
+    cache: LruCache<(String, u16), TextBlob>
 }
 
 impl CachingShaper {
@@ -19,11 +19,16 @@ impl CachingShaper {
         blob
     }
 
-    pub fn shape_cached(&mut self, text: String, font: &Font) -> &TextBlob {
-        if !self.cache.contains(&text) {
-            self.cache.put(text.clone(), self.shape(&text, &font));
+    pub fn shape_cached(&mut self, text: String, scale: u16, font: &Font) -> &TextBlob {
+        let key = (text.clone(), scale);
+        if !self.cache.contains(&key) {
+            self.cache.put(key.clone(), self.shape(&text, &font));
         }
 
-        self.cache.get(&text).unwrap()
+        self.cache.get(&key).unwrap()
+    }
+
+    pub fn clear(&mut self) {
+        self.cache.clear();
     }
 }

src/renderer/cursor_renderer.rs

@@ -5,7 +5,7 @@ use skulpin::skia_safe::{Canvas, Paint, Path, Point};
 use crate::renderer::{CachingShaper, FontLookup};
 use crate::editor::{Colors, Cursor, CursorShape, Editor};
 
-const AVERAGE_MOTION_PERCENTAGE: f32 = 0.8;
+const AVERAGE_MOTION_PERCENTAGE: f32 = 0.6;
 const MOTION_PERCENTAGE_SPREAD: f32 = 0.5;
 
 const BAR_WIDTH: f32 = 1.0 / 8.0;
@@ -142,7 +142,7 @@ impl CursorRenderer {
                     .map(|(character, _)| character)
                     .unwrap_or(' ');
                 canvas.draw_text_blob(
-                    shaper.shape_cached(character.to_string(), &fonts_lookup.size(1).normal), 
+                    shaper.shape_cached(character.to_string(), 1, &fonts_lookup.size(1).normal), 
                     (cursor_x, cursor_y), &paint);
             }
         }

src/renderer/mod.rs

@@ -149,7 +149,7 @@ impl Renderer {
         self.paint.set_color(style.foreground(&default_colors).to_color());
         let text = text.trim_end();
         if text.len() > 0 {
-            let blob = self.shaper.shape_cached(text.to_string(), self.fonts_lookup.size(size).get(&style));
+            let blob = self.shaper.shape_cached(text.to_string(), size, self.fonts_lookup.size(size).get(&style));
             canvas.draw_text_blob(blob, (x, y), &self.paint);
         }
     }

src/window.rs

@@ -124,20 +124,33 @@ pub fn ui_loop(editor: Arc<Mutex<Editor>>, nvim: Neovim, initial_size: (u64, u64
 
             Event::WindowEvent {
                 event: WindowEvent::MouseWheel {
-                    delta: MouseScrollDelta::LineDelta(_, delta),
+                    delta: MouseScrollDelta::LineDelta(horizontal, vertical),
                     ..
                 },
                 ..
             } => {
-                let input_type = if delta > 0.0 {
+                let vertical_input_type = if vertical > 0.0 {
                     Some("up")
-                } else if delta < 0.0 {
+                } else if vertical < 0.0 {
                     Some("down")
                 } else {
                     None
                 };
 
-                if let Some(input_type) = input_type {
+                if let Some(input_type) = vertical_input_type {
+                    let (grid_x, grid_y) = mouse_pos;
+                    nvim.input_mouse("wheel", input_type, "", 0, grid_y, grid_x).expect("Could not send mouse input");
+                }
+
+                let horizontal_input_type = if horizontal > 0.0 {
+                    Some("right")
+                } else if horizontal < 0.0 {
+                    Some("left")
+                } else {
+                    None
+                };
+
+                if let Some(input_type) = horizontal_input_type {
                     let (grid_x, grid_y) = mouse_pos;
                     nvim.input_mouse("wheel", input_type, "", 0, grid_y, grid_x).expect("Could not send mouse input");
                 }