more progress toward externalized command bar

src/editor/command_line.rs

@@ -1,27 +1,101 @@
-use crate::events::{GridLineCell, RedrawEvent, StyledContent};
+use std::collections::HashMap;
+
+use crate::events::{RedrawEvent, StyledContent};
+use crate::editor::{DrawCommand, Style};
 
 pub struct CommandLine {
     visible: bool,
     prefix: String,
     content: StyledContent,
     cursor_position: u64,
-    special_char: (String, bool),
+    special_char: Option<(String, bool)>,
     block: Vec<StyledContent>
 }
 
 impl CommandLine {
+    pub fn new() -> CommandLine {
+        CommandLine {
+            visible: false,
+            prefix: String::new(),
+            content: Vec::new(),
+            cursor_position: 0,
+            special_char: None,
+            block: Vec::new()
+        }
+    }
+
+    pub fn draw(&self, window_size: (u64, u64), defined_styles: &HashMap<u64, Style>) -> Vec<DrawCommand> {
+        let mut draw_commands = Vec::new();
+        if self.content.len() > 0 {
+            let (width, height) = window_size;
+            let text_length: usize = self.content.iter().map(|(_, text)| text.len()).sum();
+
+            let x = (width / 2) - (text_length as u64 / 2);
+            let y = height / 2;
+
+            let mut start_x = x;
+            let mut commands = self.content.iter().map(|(style_id, text)| {
+                let command_width = text.len();
+                let style = defined_styles.get(style_id).map(|style| style.clone());
+                let command = DrawCommand::new(text.clone(), (start_x, y), style);
+                start_x = start_x + command_width as u64;
+                command
+            }).collect::<Vec<DrawCommand>>();
+            draw_commands.append(&mut commands);
+        }
+        draw_commands
+    }
+
     pub fn handle_command_events(&mut self, event: RedrawEvent) {
         match event {
-            RedrawEvent::CommandLineShow { content, position, first_character, prompt, indent, level } => {},
-            RedrawEvent::CommandLinePosition { position, level } => {},
-            RedrawEvent::CommandLineSpecialCharacter { character, shift, level } => {},
-            RedrawEvent::CommandLineHide => {},
-            RedrawEvent::CommandLineBlockShow { lines } => {},
-            RedrawEvent::CommandLineBlockAppend { line } => {},
-            RedrawEvent::CommandLineBlockHide => {}
+            RedrawEvent::CommandLineShow { content, position, first_character, prompt, indent, level } => self.show(content, position, first_character, prompt, indent, level),
+            RedrawEvent::CommandLinePosition { position, level } => self.set_position(position, level),
+            RedrawEvent::CommandLineSpecialCharacter { character, shift, level } => self.set_special_character(character, shift, level),
+            RedrawEvent::CommandLineHide => self.hide(),
+            RedrawEvent::CommandLineBlockShow { lines } => self.show_block(lines),
+            RedrawEvent::CommandLineBlockAppend { line } => self.append_line_to_block(line),
+            RedrawEvent::CommandLineBlockHide => self.hide_block(),
             _ => {}
         }
     }
 
-//     fn show()
+    fn show(&mut self, content: StyledContent, position: u64, first_character: String, prompt: String, _indent: u64, _level: u64) {
+        let prefix;
+        if first_character.len() > 0 {
+            prefix = first_character;
+        } else {
+            prefix = prompt;
+        }
+
+        self.visible = true;
+        self.prefix = prefix;
+        self.content = content;
+        self.cursor_position = position;
+        self.block = Vec::new();
+    }
+
+    fn set_position(&mut self, position: u64, level: u64) {
+        self.cursor_position = position;
+    }
+
+    fn set_special_character(&mut self, character: String, shift: bool, _level: u64) {
+        self.special_char = Some((character, shift));
+    }
+
+    fn hide(&mut self) {
+        self.visible = false;
+        self.special_char = None;
+    }
+
+    fn show_block(&mut self, lines: Vec<StyledContent>) {
+        self.block = lines;
+    }
+
+    fn append_line_to_block(&mut self, line: StyledContent) {
+        self.block.push(line);
+    }
+
+    fn hide_block(&mut self) {
+        self.block.clear();
+    }
 }

src/editor/mod.rs

@@ -9,15 +9,18 @@ mod command_line;
 
 pub use cursor::{Cursor, CursorShape, CursorMode};
 pub use style::{Colors, Style};
+use command_line::CommandLine;
 use crate::events::{GridLineCell, RedrawEvent};
 
-pub type GridCell = Option<(char, Style)>;
+pub type GridCell = Option<(char, Option<Style>)>;
 
 #[derive(new, Debug, Clone)]
 pub struct DrawCommand {
     pub text: String,
     pub grid_position: (u64, u64),
-    pub style: Style
+    pub style: Option<Style>,
+    #[new(value = "1")]
+    pub scale: u16
 }
 
 pub struct Editor {
@@ -27,6 +30,7 @@ pub struct Editor {
 
     pub window: Option<Arc<Window>>,
 
+    pub command_line: CommandLine,
     pub title: String,
     pub size: (u64, u64),
     pub cursor: Cursor,
@@ -44,6 +48,7 @@ impl Editor {
 
             window: None,
 
+            command_line: CommandLine::new(),
             title: "Neovide".to_string(),
             cursor: Cursor::new(),
             size: (width, height),
@@ -71,7 +76,7 @@ impl Editor {
             RedrawEvent::Clear { .. } => self.clear(),
             RedrawEvent::CursorGoto { row, column, .. } => self.cursor.position = (row, column),
             RedrawEvent::Scroll { top, bottom, left, right, rows, columns, .. } => self.scroll_region(top, bottom, left, right, rows, columns),
-            _ => {}
+            event => self.command_line.handle_command_events(event)
         };
     }
 
@@ -86,14 +91,14 @@ impl Editor {
                 }
             }
 
-            fn command_matches(command: &Option<DrawCommand>, style: &Style) -> bool {
+            fn command_matches(command: &Option<DrawCommand>, style: &Option<Style>) -> bool {
                 match command {
                     Some(command) => &command.style == style,
                     None => true
                 }
             }
 
-            fn add_character(command: &mut Option<DrawCommand>, character: &char, row_index: u64, col_index: u64, style: Style) {
+            fn add_character(command: &mut Option<DrawCommand>, character: &char, row_index: u64, col_index: u64, style: Option<Style>) {
                 match command {
                     Some(command) => command.text.push(character.clone()),
                     None => {
@@ -118,7 +123,7 @@ impl Editor {
         }
         let should_clear = self.should_clear;
 
-        let draw_commands = draw_commands.into_iter().filter(|command| {
+        let mut draw_commands = draw_commands.into_iter().filter(|command| {
             let (x, y) = command.grid_position;
             let dirty_row = &self.dirty[y as usize];
 
@@ -130,6 +135,9 @@ impl Editor {
             return false;
         }).collect::<Vec<DrawCommand>>();
 
+        let mut command_line_draw_commands = self.command_line.draw(self.size, &self.defined_styles);
+        draw_commands.append(&mut command_line_draw_commands);
+
         let (width, height) = self.size;
         self.dirty = vec![vec![false; width as usize]; height as usize];
         self.should_clear = false;
@@ -137,11 +145,10 @@ impl Editor {
     }
 
     fn draw_grid_line_cell(&mut self, row_index: u64, column_pos: &mut u64, cell: GridLineCell) {
-        let style = match (cell.highlight_id, self.previous_style.clone()) {
-            (Some(0), _) => Style::new(self.default_colors.clone()),
-            (Some(style_id), _) => self.defined_styles.get(&style_id).expect("GridLineCell must use defined color").clone(),
-            (None, Some(previous_style)) => previous_style,
-            (None, None) => Style::new(self.default_colors.clone())
+        let style = match cell.highlight_id {
+            Some(0) => None,
+            Some(style_id) => self.defined_styles.get(&style_id).map(|style| style.clone()),
+            None => self.previous_style.clone()
         };
 
         let mut text = cell.text;
@@ -160,7 +167,7 @@ impl Editor {
         }
 
         *column_pos = *column_pos + text.chars().count() as u64;
-        self.previous_style = Some(style);
+        self.previous_style = style;
     }
 
     fn draw_grid_line(&mut self, row: u64, column_start: u64, cells: Vec<GridLineCell>) {

src/events.rs

@@ -45,7 +45,7 @@ pub struct GridLineCell {
     pub repeat: Option<u64>
 }
 
-pub type StyledContent = Vec<(Style, String)>;
+pub type StyledContent = Vec<(u64, String)>;
 
 #[derive(Debug)]
 pub enum MessageKind {
@@ -347,8 +347,8 @@ fn parse_grid_scroll(grid_scroll_arguments: Vec<Value>) -> Result<RedrawEvent> {
 
 fn parse_styled_content(line: &Value) -> Result<StyledContent> {
     parse_array(line)?.iter().map(|tuple| {
-        if let [attributes, text] = parse_array(tuple)?.as_slice() {
-            Ok((parse_style(attributes)?, parse_string(text)?))
+        if let [style_id, text] = parse_array(tuple)?.as_slice() {
+            Ok((parse_u64(style_id)?, parse_string(text)?))
         } else {
             Err(EventParseError::InvalidEventFormat)
         }
@@ -525,8 +525,6 @@ pub fn parse_redraw_event(event_value: Value) -> Result<Vec<RedrawEvent>> {
 
         if let Some(parsed_event) = possible_parsed_event {
             parsed_events.push(parsed_event);
-        } else {
-            println!("Did not parse {}", event_name);
         }
     }
 

src/main.rs

@@ -1,4 +1,4 @@
-#![windows_subsystem = "windows"]
+// #![windows_subsystem = "windows"]
 
 mod editor;
 mod events;
@@ -47,7 +47,7 @@ fn start_nvim(editor: Arc<Mutex<Editor>>) -> Neovim {
     let join_handle = session.take_dispatch_guard();
     let mut nvim = Neovim::new(session);
     let mut options = UiAttachOptions::new();
-    options.set_cmdline_external(false);
+    options.set_cmdline_external(true);
     options.set_messages_external(false);
     options.set_linegrid_external(true);
     options.set_rgb(true);

src/renderer/mod.rs

@@ -1,3 +1,4 @@
+use std::collections::HashMap;
 use std::sync::{Arc, Mutex};
 use skulpin::CoordinateSystemHelper;
 use skulpin::skia_safe::{Canvas, Paint, Surface, Budgeted, Rect, Typeface, Font, FontStyle, colors};
@@ -51,12 +52,47 @@ impl Fonts {
     }
 }
 
+struct FontLookup {
+    pub name: String,
+    pub base_size: f32,
+    pub loaded_fonts: HashMap<u16, Fonts>
+}
+
+impl FontLookup {
+    pub fn new(name: &str, base_size: f32) -> FontLookup {
+        let lookup = FontLookup {
+            name: name.to_string(),
+            base_size,
+            loaded_fonts: HashMap::new()
+        };
+
+        lookup.size(1);
+        lookup.size(2);
+        lookup.size(3);
+
+        lookup
+    }
+
+    fn size(&mut self, size_multiplier: u16) -> &Fonts {
+        match self.loaded_fonts.get(&size_multiplier) {
+            Some(fonts) => fonts,
+            None => {
+                let fonts = Fonts::new(
+                    &self.name, 
+                    self.base_size * size_multiplier as f32);
+                self.loaded_fonts.insert(size_multiplier, fonts); 
+                self.loaded_fonts.get(&size_multiplier).unwrap()
+            }
+        }
+    }
+}
+
 pub struct Renderer {
     editor: Arc<Mutex<Editor>>,
 
     surface: Option<Surface>,
     paint: Paint,
-    fonts: Fonts,
+    fonts_lookup: FontLookup,
     shaper: CachingShaper,
 
     pub font_width: f32,
@@ -69,37 +105,43 @@ impl Renderer {
         let surface = None;
         let mut paint = Paint::new(colors::WHITE, None);
         paint.set_anti_alias(false);
-        let fonts = Fonts::new(FONT_NAME, FONT_SIZE);
+        let fonts_lookup = FontLookup::new(FONT_NAME, FONT_SIZE);
         let shaper = CachingShaper::new();
 
-        let (_, bounds) = fonts.normal.measure_str("_", Some(&paint));
+        let base_fonts = fonts_lookup.size(1);
+        let (_, bounds) = base_fonts.normal.measure_str("_", Some(&paint));
         let font_width = bounds.width();
-        let (_, metrics) = fonts.normal.metrics();
+        let (_, metrics) = base_fonts.normal.metrics();
         let font_height = metrics.descent - metrics.ascent;
         let cursor_pos = (0.0, 0.0);
 
-        Renderer { editor, surface, paint, fonts, shaper, font_width, font_height, cursor_pos }
+        Renderer { editor, surface, paint, fonts_lookup, shaper, font_width, font_height, cursor_pos }
     }
 
-    fn draw_background(&mut self, canvas: &mut Canvas, text: &str, grid_pos: (u64, u64), style: &Style, default_colors: &Colors) {
+    fn draw_background(&mut self, canvas: &mut Canvas, text: &str, grid_pos: (u64, u64), size: u16, style: &Option<Style>, default_colors: &Colors) {
         let (grid_x, grid_y) = grid_pos;
         let x = grid_x as f32 * self.font_width;
         let y = grid_y as f32 * self.font_height;
         let width = text.chars().count() as f32 * self.font_width;
         let height = self.font_height;
         let region = Rect::new(x, y, x + width, y + height);
+
+        let style = style.clone().unwrap_or(Style::new(default_colors.clone()));
+
         self.paint.set_color(style.background(default_colors).to_color());
         canvas.draw_rect(region, &self.paint);
     }
 
-    fn draw_foreground(&mut self, canvas: &mut Canvas, text: &str, grid_pos: (u64, u64), style: &Style, default_colors: &Colors) {
+    fn draw_foreground(&mut self, canvas: &mut Canvas, text: &str, grid_pos: (u64, u64), size: u16, style: &Option<Style>, default_colors: &Colors) {
         let (grid_x, grid_y) = grid_pos;
         let x = grid_x as f32 * self.font_width;
         let y = grid_y as f32 * self.font_height;
         let width = text.chars().count() as f32 * self.font_width;
 
+        let style = style.clone().unwrap_or(Style::new(default_colors.clone()));
+
         if style.underline || style.undercurl {
-            let (_, metrics) = self.fonts.get(style).metrics();
+            let (_, metrics) = self.fonts_lookup.size(scale).get(&style).metrics();
             let line_position = metrics.underline_position().unwrap();
 
             self.paint.set_color(style.special(&default_colors).to_color());
@@ -109,7 +151,7 @@ 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.get(style));
+            let blob = self.shaper.shape_cached(text.to_string(), self.fonts.get(&style));
             canvas.draw_text_blob(blob, (x, y), &self.paint);
         }
     }

src/window.rs

@@ -30,6 +30,8 @@ pub fn ui_loop(editor: Arc<Mutex<Editor>>, nvim: Neovim, initial_size: (u64, u64
         .expect("Failed to create window"));
 
     let mut skulpin_renderer = RendererBuilder::new()
+        .prefer_integrated_gpu()
+        .use_vulkan_debug_layer(true)
         .coordinate_system(CoordinateSystem::Logical)
         .build(&window)
         .expect("Failed to create renderer");