better keybindings and animated cursor

src/editor.rs

@@ -1,4 +1,5 @@
 use std::collections::HashMap;
+
 use skulpin::skia_safe::{colors, Color4f};
 
 use neovim_lib::{Neovim, NeovimApi};
@@ -31,10 +32,10 @@ pub struct Style {
 
 #[derive(new)]
 pub struct GridLineCell {
-    pub grid: u16,
+    pub grid: usize,
     pub text: String,
-    pub row: u16,
+    pub row: usize,
-    pub col_start: u16,
+    pub col_start: usize,
     pub style_id: Option<u64>
 }
 
@@ -43,27 +44,36 @@ pub type GridCell = Option<(char, Style)>;
 #[derive(new, Debug, Clone)]
 pub struct DrawCommand {
     pub text: String,
-    pub row: u16,
+    pub row: usize,
-    pub col_start: u16,
+    pub col_start: usize,
     pub style: Style
 }
 
+#[derive(Clone)]
+pub enum CursorType {
+    Block,
+    Horizontal,
+    Vertical
+}
+
 pub struct Editor {
     pub nvim: Neovim,
     pub grid: Vec<Vec<GridCell>>,
-    pub cursor_pos: (u16, u16),
+    pub cursor_pos: (usize, usize),
-    pub size: (u16, u16),
+    pub cursor_type: CursorType,
+    pub size: (usize, usize),
     pub default_colors: Colors,
     pub defined_styles: HashMap<u64, Style>,
     pub previous_style: Option<Style>
 }
 
 impl Editor {
-    pub fn new(nvim: Neovim, width: u16, height: u16) -> Editor {
+    pub fn new(nvim: Neovim, width: usize, height: usize) -> Editor {
         let mut editor = Editor {
             nvim,
             grid: Vec::new(),
             cursor_pos: (0, 0),
+            cursor_type: CursorType::Block,
             size: (width, height),
             default_colors: Colors::new(Some(colors::WHITE), Some(colors::BLACK), Some(colors::GREY)),
             defined_styles: HashMap::new(),
@@ -91,7 +101,7 @@ impl Editor {
                 }
             }
 
-            fn add_character(command: &mut Option<DrawCommand>, character: &char, row_index: u16, col_index: u16, style: Style) {
+            fn add_character(command: &mut Option<DrawCommand>, character: &char, row_index: usize, col_index: usize, style: Style) {
                 match command {
                     Some(command) => command.text.push(character.clone()),
                     None => {
@@ -106,7 +116,7 @@ impl Editor {
                         add_command(&mut draw_commands, command);
                         command = None;
                     }
-                    add_character(&mut command, &character, row_index as u16, col_index as u16, new_style.clone());
+                    add_character(&mut command, &character, row_index as usize, col_index as usize, new_style.clone());
                 } else {
                     add_command(&mut draw_commands, command);
                     command = None;
@@ -144,12 +154,62 @@ impl Editor {
         self.previous_style = Some(style);
     }
 
+    pub fn scroll_region(&mut self, top: isize, bot: isize, left: isize, right: isize, rows: isize, cols: isize) {
+        let (top, bot) =  if rows > 0 {
+            (top + rows, bot)
+        } else if rows < 0 {
+            (top, bot + rows)
+        } else {
+            (top, bot)
+        };
+
+        let (left, right) = if cols > 0 {
+            (left + cols, right)
+        } else if rows < 0 {
+            (left, right + cols)
+        } else {
+            (left, right)
+        };
+
+        let width = right - left;
+        let height = bot - top;
+
+        let mut region = Vec::new();
+        for y in top..bot {
+            let row = &self.grid[y as usize];
+            let mut copied_section = Vec::new();
+            for x in left..right {
+                copied_section.push(row[x as usize].clone());
+            }
+            region.push(copied_section);
+        }
+
+        let new_top = top as isize - rows;
+        let new_left = left as isize - cols;
+
+        dbg!(top, bot, left, right, rows, cols, new_top, new_left);
+
+        for (y, row_section) in region.into_iter().enumerate() {
+            for (x, cell) in row_section.into_iter().enumerate() {
+                let y = new_top + y as isize;
+                if y >= 0 && y < self.grid.len() as isize {
+                    let mut row = &mut self.grid[y as usize];
+                    let x = new_left + x as isize;
+                    if x >= 0 && x < row.len() as isize {
+                        row[x as usize] = cell;
+                    }
+                }
+            }
+        }
+    }
+
+
     pub fn clear(&mut self) {
         let (width, height) = self.size;
         self.grid = vec![vec![None; width as usize]; height as usize];
     }
 
-    pub fn resize(&mut self, new_width: u16, new_height: u16) {
+    pub fn resize(&mut self, new_width: usize, new_height: usize) {
         self.nvim.ui_try_resize(new_width as i64, new_height as i64).expect("Resize failed");
         self.size = (new_width, new_height);
     }
@@ -162,7 +222,7 @@ impl Editor {
         self.default_colors = Colors::new(Some(foreground), Some(background), Some(special));
     }
 
-    pub fn jump_cursor_to(&mut self, row: u16, col: u16) {
+    pub fn jump_cursor_to(&mut self, row: usize, col: usize) {
         self.cursor_pos = (row, col);
     }
 }

src/keybindings.rs

@@ -80,13 +80,15 @@ fn parse_keycode(keycode: VirtualKeyCode) -> Option<(String, bool)> {
         VirtualKeyCode::Space => Some(("Space".to_string(), true)),
         VirtualKeyCode::Apostrophe => Some(("'".to_string(), false)),
         VirtualKeyCode::Backslash => Some(("Bslash".to_string(), true)),
-        VirtualKeyCode::Colon => Some((":".to_string(), false)),
         VirtualKeyCode::Comma => Some((",".to_string(), false)),
-        VirtualKeyCode::Decimal => Some((".".to_string(), false)),
-        VirtualKeyCode::Divide => Some(("/".to_string(), false)),
         VirtualKeyCode::Equals => Some(("=".to_string(), false)),
+        VirtualKeyCode::LBracket => Some(("[".to_string(), false)),
         VirtualKeyCode::Minus => Some(("-".to_string(), false)),
+        VirtualKeyCode::Period => Some((".".to_string(), false)),
+        VirtualKeyCode::RBracket => Some(("]".to_string(), false)),
         VirtualKeyCode::Semicolon => Some((";".to_string(), false)),
+        VirtualKeyCode::Slash => Some(("/".to_string(), false)),
+        VirtualKeyCode::Tab => Some(("<Tab>".to_string(), false)),
         _ => None
     }
 }
@@ -97,11 +99,6 @@ fn append_modifiers(modifiers: ModifiersState, keycode_text: String, special: bo
 
     if modifiers.shift {
         result = match result.as_ref() {
-            "," => "<".to_string(),
-            "." => ">".to_string(),
-            ";" => ":".to_string(),
-            "=" => "+".to_string(),
-            "-" => "_".to_string(),
             "1" => "!".to_string(),
             "2" => "@".to_string(),
             "3" => "#".to_string(),
@@ -112,6 +109,16 @@ fn append_modifiers(modifiers: ModifiersState, keycode_text: String, special: bo
             "8" => "*".to_string(),
             "9" => "(".to_string(),
             "0" => ")".to_string(),
+            "'" => "\"".to_string(),
+            "Bslash" => "|".to_string(),
+            "," => "<".to_string(),
+            "=" => "+".to_string(),
+            "[" => "{".to_string(),
+            "-" => "_".to_string(),
+            "." => ">".to_string(),
+            "]" => "}".to_string(),
+            ";" => ":".to_string(),
+            "/" => "?".to_string(),
             other => {
                 special = true;
                 format!("S-{}", result)

src/main.rs

@@ -1,4 +1,4 @@
-//#![windows_subsystem = "windows"]
+#![windows_subsystem = "windows"]
 
 mod editor;
 mod window;
@@ -21,16 +21,16 @@ use editor::{Colors, Editor, GridLineCell, Style};
 
 use skulpin::skia_safe::Color4f;
 
-const INITIAL_WIDTH: u16 = 100;
+const INITIAL_WIDTH: usize = 100;
-const INITIAL_HEIGHT: u16 = 50;
+const INITIAL_HEIGHT: usize = 50;
 
 fn handle_grid_line(grid_line_arguments: &Vec<Value>, editor: &Arc<Mutex<Editor>>) {
     if let [Value::Integer(grid_id), Value::Integer(row), Value::Integer(col_start), Value::Array(cells)] = grid_line_arguments.as_slice() {
-        let mut col_pos = col_start.as_u64().unwrap() as u16;
+        let mut col_pos = col_start.as_u64().unwrap() as usize;
         for cell in cells.into_iter() {
             if let Value::Array(cell_data) = cell {
-                let grid_id = grid_id.as_u64().unwrap() as u16;
+                let grid_id = grid_id.as_u64().unwrap() as usize;
-                let row = row.as_u64().unwrap() as u16;
+                let row = row.as_u64().unwrap() as usize;
 
                 let mut text = match cell_data.get(0).expect("Cell must have non zero size") {
                     Value::String(cell_text) => cell_text.as_str().expect("Could not process string").to_string(),
@@ -47,7 +47,7 @@ fn handle_grid_line(grid_line_arguments: &Vec<Value>, editor: &Arc<Mutex<Editor>
                 }
 
                 let mut editor = editor.lock().unwrap();
-                let length = text.chars().count() as u16;
+                let length = text.chars().count();
                 editor.draw(GridLineCell::new(grid_id, text, row, col_pos, style_id));
                 col_pos = col_pos + length;
             } else {
@@ -67,7 +67,7 @@ fn handle_clear(_clear_arguments: &Vec<Value>, editor: &Arc<Mutex<Editor>>) {
 fn handle_cursor_goto(cursor_goto_arguments: &Vec<Value>, editor: &Arc<Mutex<Editor>>) {
     if let [Value::Integer(_grid_id), Value::Integer(row), Value::Integer(column)] = cursor_goto_arguments.as_slice() {
         let mut editor = editor.lock().unwrap();
-        editor.jump_cursor_to(column.as_u64().unwrap() as u16, row.as_u64().unwrap() as u16);
+        editor.jump_cursor_to(column.as_u64().unwrap() as usize, row.as_u64().unwrap() as usize);
     } else {
         println!("Invalid cursor_goto format: {:?}", cursor_goto_arguments);
     }
@@ -107,7 +107,6 @@ fn handle_hl_attr_define(hl_attr_define_arguments: &Vec<Value>, editor: &Arc<Mut
         Value::Integer(id), Value::Map(attributes), Value::Map(_terminal_attributes), Value::Array(_info)
     ] = hl_attr_define_arguments.as_slice() {
         let id = id.as_u64().unwrap();
-        let mut editor = editor.lock().unwrap();
         let mut style = Style::new(Colors::new(None, None, None));
         for attribute in attributes {
             if let (Value::String(name), value) = attribute {
@@ -121,10 +120,28 @@ fn handle_hl_attr_define(hl_attr_define_arguments: &Vec<Value>, editor: &Arc<Mut
                 println!("Invalid attribute format");
             }
         }
+
+        let mut editor = editor.lock().unwrap();
         editor.define_style(id, style);
     }
 }
 
+fn handle_grid_scroll(grid_scroll_arguments: &Vec<Value>, editor: &Arc<Mutex<Editor>>) {
+    if let [
+        Value::Integer(_grid_id), Value::Integer(top), Value::Integer(bot), Value::Integer(left), 
+        Value::Integer(right), Value::Integer(rows), Value::Integer(cols)
+    ] = grid_scroll_arguments.as_slice() {
+        let top = top.as_u64().unwrap() as isize;
+        let bot = bot.as_u64().unwrap() as isize;
+        let left = left.as_u64().unwrap() as isize;
+        let right = right.as_u64().unwrap() as isize;
+        let rows = rows.as_i64().unwrap() as isize;
+        let cols = cols.as_i64().unwrap() as isize;
+        let mut editor = editor.lock().unwrap();
+        editor.scroll_region(top, bot, left, right, rows, cols);
+    }
+}
+
 fn handle_redraw_event(event_value: Value, editor: &Arc<Mutex<Editor>>) {
     match event_value {
         Value::Array(event_contents) => {
@@ -137,10 +154,11 @@ fn handle_redraw_event(event_value: Value, editor: &Arc<Mutex<Editor>>) {
                             "grid_resize" => println!("grid_resize event ignored"),
                             "default_colors_set" => handle_default_colors(arguments, editor),
                             "hl_attr_define" => handle_hl_attr_define(arguments, editor),
+                            "hl_group_set" => println!("hl_group_set event ignored"),
                             "grid_line" => handle_grid_line(arguments, &editor),
                             "grid_clear" => handle_clear(arguments, &editor),
                             "grid_cursor_goto" => handle_cursor_goto(arguments, &editor),
-                            "hl_group_set" => println!("hl_group_set event ignored"),
+                            "grid_scroll" => handle_grid_scroll(arguments, &editor),
                             other => println!("Unhandled redraw command {}", other)
                         }
                     },

src/window.rs

@@ -5,14 +5,14 @@ use skulpin::{CoordinateSystem, CoordinateSystemHelper, RendererBuilder};
 use skulpin::skia_safe::{Canvas, Color4f, Font, FontStyle, Point, Paint, Rect, Typeface};
 use skulpin::skia_safe::paint::Style;
 use skulpin::skia_safe::matrix::ScaleToFit;
-use skulpin::winit::dpi::LogicalSize;
+use skulpin::winit::dpi::{LogicalSize, LogicalPosition};
 use skulpin::winit::event::{ElementState, Event, KeyboardInput, VirtualKeyCode, WindowEvent};
 use skulpin::winit::event_loop::{ControlFlow, EventLoop};
 use skulpin::winit::window::WindowBuilder;
 
 use neovim_lib::NeovimApi;
 
-use crate::editor::{DrawCommand, Editor, Colors};
+use crate::editor::{DrawCommand, Editor, Colors, CursorType};
 use crate::keybindings::construct_keybinding_string;
 
 const FONT_NAME: &str = "Delugia Nerd Font";
@@ -24,19 +24,24 @@ const FONT_SIZE: f32 = 14.0;
 fn draw(
     editor: &Arc<Mutex<Editor>>,
     canvas: &mut Canvas,
+    cursor_pos: &mut (f32, f32),
     font: &Font,
     font_width: f32,
     font_height: f32
 ) {
-
     // let shaper = Shaper::new(None);
     // if let Some((blob, _)) = shaper.shape_text_blob("This is a test ~==", font, false, 10000.0, Point::default()) {
     //     canvas.draw_text_blob(&blob, (50, 50), &paint);
     // }
 
-    let (draw_commands, default_colors, cursor_pos) = {
+    let (draw_commands, default_colors, cursor_grid_pos, cursor_type) = {
         let editor = editor.lock().unwrap();
-        (editor.build_draw_commands().clone(), editor.default_colors.clone(), editor.cursor_pos.clone())
+        (
+            editor.build_draw_commands().clone(), 
+            editor.default_colors.clone(), 
+            editor.cursor_pos.clone(), 
+            editor.cursor_type.clone()
+        )
     };
 
     canvas.clear(default_colors.background.clone().unwrap().to_color());
@@ -55,14 +60,37 @@ fn draw(
         canvas.draw_str(&command.text, (x, y), &font, &foreground_paint);
     }
 
-    let (cursor_grid_x, cursor_grid_y) = cursor_pos;
+    let (cursor_grid_x, cursor_grid_y) = cursor_grid_pos;
-    let cursor_x = cursor_grid_x as f32 * font_width;
+    let target_cursor_x = cursor_grid_x as f32 * font_width;
-    let cursor_width = font_width / 8.0;
+    let target_cursor_y = cursor_grid_y as f32 * font_height;
-    let cursor_y = cursor_grid_y as f32 * font_height;
+    let (previous_cursor_x, previous_cursor_y) = cursor_pos;
-    let cursor_height = font_height;
+
+    let cursor_x = (target_cursor_x - *previous_cursor_x) * 0.05 + *previous_cursor_x;
+    let cursor_y = (target_cursor_y - *previous_cursor_y) * 0.05 + *previous_cursor_y;
+
+    *cursor_pos = (cursor_x, cursor_y);
+
+    let cursor_width = match cursor_type {
+        CursorType::Vertical => font_width / 8.0,
+        CursorType::Horizontal | CursorType::Block => font_width
+    };
+    let cursor_height = match cursor_type {
+        CursorType::Horizontal => font_width / 8.0,
+        CursorType::Vertical | CursorType::Block => font_height
+    };
     let cursor = Rect::new(cursor_x, cursor_y, cursor_x + cursor_width, cursor_y + cursor_height);
     let cursor_paint = Paint::new(default_colors.foreground.unwrap(), None);
     canvas.draw_rect(cursor, &cursor_paint);
+
+    if let CursorType::Block = cursor_type {
+        let text_paint = Paint::new(default_colors.background.unwrap(), None);
+        let editor = editor.lock().unwrap();
+        let character = editor.grid[cursor_grid_y][cursor_grid_x].clone()
+            .map(|(character, _)| character)
+            .unwrap_or(' ');
+        let text_y = cursor_y + font_height - font_height * 0.2;
+        canvas.draw_str(character.to_string(), (cursor_x, text_y), &font, &text_paint);
+    }
 }
 
 pub fn ui_loop(editor: Arc<Mutex<Editor>>) {
@@ -95,6 +123,8 @@ pub fn ui_loop(editor: Arc<Mutex<Editor>>) {
         .build(&window)
         .expect("Failed to create renderer");
 
+    let mut cursor_pos = (0.0, 0.0);
+
     // icu::init();
 
     event_loop.run(move |event, _window_target, control_flow| {
@@ -110,13 +140,13 @@ pub fn ui_loop(editor: Arc<Mutex<Editor>>) {
             } => {
                 if new_size.width > 0.0 && new_size.height > 0.0 {
                     editor.lock().unwrap().resize(
-                        (new_size.width as f32 / font_width) as u16, 
+                        (new_size.width as f32 / font_width) as usize, 
-                        (new_size.height as f32 / font_height) as u16
+                        (new_size.height as f32 / font_height) as usize
                     )
                 }
             },
 
-            Event:: WindowEvent {
+            Event::WindowEvent {
                 event: WindowEvent::KeyboardInput {
                     input,
                     ..
@@ -138,7 +168,7 @@ pub fn ui_loop(editor: Arc<Mutex<Editor>>) {
                 ..
             } => {
                 if let Err(e) = renderer.draw(&window, |canvas, _coordinate_system_helper| {
-                    draw(&editor, canvas, &font, font_width, font_height);
+                    draw(&editor, canvas, &mut cursor_pos, &font, font_width, font_height);
                 }) {
                     println!("Error during draw: {:?}", e);
                     *control_flow = ControlFlow::Exit