From 8467ef18ab7d5d4185a3b1e443dfef58689ee196 Mon Sep 17 00:00:00 2001
From: Keith Simmons <keith@the-simmons.net>
Date: Tue, 17 Dec 2019 13:00:33 -0800
Subject: [PATCH] refactored editor into multiple files to make things more
 readable

---
 src/editor/cursor.rs             |  81 ++++++++++++++
 src/{editor.rs => editor/mod.rs} | 184 +++++--------------------------
 src/editor/style.rs              |  49 ++++++++
 src/events.rs                    |  26 +++--
 src/main.rs                      |   2 +-
 src/renderer/mod.rs              |  37 +++----
 6 files changed, 188 insertions(+), 191 deletions(-)
 create mode 100644 src/editor/cursor.rs
 rename src/{editor.rs => editor/mod.rs} (56%)
 create mode 100644 src/editor/style.rs

diff --git a/src/editor/cursor.rs b/src/editor/cursor.rs
new file mode 100644
index 0000000..4bd95f8
--- /dev/null
+++ b/src/editor/cursor.rs
@@ -0,0 +1,81 @@
+use std::collections::HashMap;
+use skulpin::skia_safe::Color4f;
+
+use super::style::{Style, Colors};
+
+#[derive(Debug, Clone, PartialEq)]
+pub enum CursorShape {
+    Block,
+    Horizontal,
+    Vertical
+}
+
+impl CursorShape {
+    pub fn from_type_name(name: &str) -> Option<CursorShape> {
+        match name {
+            "block" => Some(CursorShape::Block),
+            "horizontal" => Some(CursorShape::Horizontal),
+            "vertical" => Some(CursorShape::Vertical),
+            _ => None
+        }
+    }
+}
+
+#[derive(new, Debug, Clone, PartialEq)]
+pub struct CursorMode {
+    #[new(default)]
+    pub shape: Option<CursorShape>,
+    #[new(default)]
+    pub style_id: Option<u64>
+}
+
+#[derive(Clone)]
+pub struct Cursor {
+    pub position: (u64, u64),
+    pub shape: CursorShape,
+    pub style: Option<Style>,
+    pub enabled: bool,
+    pub mode_list: Vec<CursorMode>
+}
+
+impl Cursor {
+    pub fn new() -> Cursor {
+        Cursor {
+            position: (0, 0),
+            shape: CursorShape::Block,
+            style: Option::<Style>::default(),
+            enabled: true,
+            mode_list: Vec::new()
+        }
+    }
+
+    pub fn foreground(&self, default_colors: &Colors) -> Color4f {
+        if let Some(style) = &self.style {
+            style.colors.foreground.clone().unwrap_or(default_colors.background.clone().unwrap())
+        } else {
+            default_colors.background.clone().unwrap()
+        }
+    }
+
+    pub fn background(&self, default_colors: &Colors) -> Color4f {
+        if let Some(style) = &self.style {
+            style.colors.background.clone().unwrap_or(default_colors.foreground.clone().unwrap())
+        } else {
+            default_colors.foreground.clone().unwrap()
+        }
+    }
+
+    pub fn change_mode(&mut self, mode_index: u64, styles: &HashMap<u64, Style>) {
+        if let Some(CursorMode { shape, style_id }) = self.mode_list.get(mode_index as usize) {
+            if let Some(shape) = shape {
+                self.shape = shape.clone();
+            }
+
+            if let Some(style_id) = style_id {
+                self.style = styles
+                    .get(style_id)
+                    .map(|style_reference| style_reference.clone());
+            }
+        }
+    }
+}
diff --git a/src/editor.rs b/src/editor/mod.rs
similarity index 56%
rename from src/editor.rs
rename to src/editor/mod.rs
index f522b90..558cb2b 100644
--- a/src/editor.rs
+++ b/src/editor/mod.rs
@@ -1,65 +1,13 @@
 use std::collections::HashMap;
+use skulpin::skia_safe::colors;
 
-use skulpin::skia_safe::{colors, Color4f};
+mod cursor;
+mod style;
 
+pub use cursor::{Cursor, CursorShape, CursorMode};
+pub use style::{Colors, Style};
 use crate::events::{GridLineCell, RedrawEvent};
 
-#[derive(new, PartialEq, Debug, Clone)]
-pub struct Colors {
-    pub foreground: Option<Color4f>,
-    pub background: Option<Color4f>,
-    pub special: Option<Color4f>
-}
-
-#[derive(new, Debug, Clone, PartialEq)]
-pub struct Style {
-    pub colors: Colors,
-    #[new(default)]
-    pub reverse: bool,
-    #[new(default)]
-    pub italic: bool,
-    #[new(default)]
-    pub bold: bool,
-    #[new(default)]
-    pub strikethrough: bool,
-    #[new(default)]
-    pub underline: bool,
-    #[new(default)]
-    pub undercurl: bool,
-    #[new(default)]
-    pub blend: u8
-}
-
-impl Style {
-    pub fn foreground(&self, default_colors: &Colors) -> Color4f {
-        if self.reverse {
-            self.colors.background.clone().unwrap_or(default_colors.background.clone().unwrap())
-        } else {
-            self.colors.foreground.clone().unwrap_or(default_colors.foreground.clone().unwrap())
-        }
-    }
-
-    pub fn background(&self, default_colors: &Colors) -> Color4f {
-        if self.reverse {
-            self.colors.foreground.clone().unwrap_or(default_colors.foreground.clone().unwrap())
-        } else {
-            self.colors.background.clone().unwrap_or(default_colors.background.clone().unwrap())
-        }
-    }
-
-    pub fn special(&self, default_colors: &Colors) -> Color4f {
-        self.colors.special.clone().unwrap_or(default_colors.special.clone().unwrap())
-    }
-}
-
-#[derive(new, Debug, Clone, PartialEq)]
-pub struct ModeInfo {
-    #[new(default)]
-    pub cursor_type: Option<CursorType>,
-    #[new(default)]
-    pub cursor_style_id: Option<u64>
-}
-
 pub type GridCell = Option<(char, Style)>;
 
 #[derive(new, Debug, Clone)]
@@ -69,35 +17,13 @@ pub struct DrawCommand {
     pub style: Style
 }
 
-#[derive(Debug, Clone, PartialEq)]
-pub enum CursorType {
-    Block,
-    Horizontal,
-    Vertical
-}
-
-impl CursorType {
-    pub fn from_type_name(name: &str) -> Option<CursorType> {
-        match name {
-            "block" => Some(CursorType::Block),
-            "horizontal" => Some(CursorType::Horizontal),
-            "vertical" => Some(CursorType::Vertical),
-            _ => None
-        }
-    }
-}
-
 pub struct Editor {
     pub grid: Vec<Vec<GridCell>>,
     pub title: String,
-    pub cursor_pos: (u64, u64),
-    pub cursor_type: CursorType,
-    pub cursor_style: Option<Style>,
-    pub cursor_enabled: bool,
     pub size: (u64, u64),
+    pub cursor: Cursor,
     pub default_colors: Colors,
     pub defined_styles: HashMap<u64, Style>,
-    pub mode_list: Vec<ModeInfo>,
     pub previous_style: Option<Style>
 }
 
@@ -106,33 +32,31 @@ impl Editor {
         let mut editor = Editor {
             grid: Vec::new(),
             title: "".to_string(),
-            cursor_pos: (0, 0),
-            cursor_type: CursorType::Block,
-            cursor_style: None,
-            cursor_enabled: true,
+            cursor: Cursor::new(),
             size: (width, height),
             default_colors: Colors::new(Some(colors::WHITE), Some(colors::BLACK), Some(colors::GREY)),
             defined_styles: HashMap::new(),
-            mode_list: Vec::new(),
             previous_style: None
         };
+
         editor.clear();
         editor
     }
 
-    pub fn cursor_foreground(&self) -> Color4f {
-        if let Some(cursor_style) = &self.cursor_style {
-            cursor_style.colors.foreground.clone().unwrap_or(self.default_colors.background.clone().unwrap())
-        } else {
-            self.default_colors.background.clone().unwrap()
-        }
-    }
-
-    pub fn cursor_background(&self) -> Color4f {
-        if let Some(cursor_style) = &self.cursor_style {
-            cursor_style.colors.background.clone().unwrap_or(self.default_colors.foreground.clone().unwrap())
-        } else {
-            self.default_colors.foreground.clone().unwrap()
+    pub fn handle_redraw_event(&mut self, event: RedrawEvent) {
+        match event {
+            RedrawEvent::SetTitle { title } => self.title = title,
+            RedrawEvent::ModeInfoSet { cursor_modes } => self.cursor.mode_list = cursor_modes,
+            RedrawEvent::ModeChange { mode_index } => self.cursor.change_mode(mode_index, &self.defined_styles),
+            RedrawEvent::BusyStart => self.cursor.enabled = false,
+            RedrawEvent::BusyStop => self.cursor.enabled = true,
+            RedrawEvent::Resize { width, height, .. } => self.resize((width, height)),
+            RedrawEvent::DefaultColorsSet { colors } => self.default_colors = colors,
+            RedrawEvent::HighlightAttributesDefine { id, style } => { self.defined_styles.insert(id, style); },
+            RedrawEvent::GridLine { row, column_start, cells, .. } => self.draw_grid_line(row, column_start, cells),
+            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)
         }
     }
 
@@ -181,61 +105,6 @@ impl Editor {
         }).flatten().collect()
     }
 
-    pub fn handle_redraw_event(&mut self, event: RedrawEvent) {
-        match event {
-            RedrawEvent::SetTitle { title } => self.set_title(title),
-            RedrawEvent::ModeInfoSet { mode_list } => self.set_mode_list(mode_list),
-            RedrawEvent::ModeChange { mode_index } => self.change_mode(mode_index),
-            RedrawEvent::BusyStart => self.set_cursor_enabled(false),
-            RedrawEvent::BusyStop => self.set_cursor_enabled(true),
-            RedrawEvent::Resize { width, height, .. } => self.resize(width, height),
-            RedrawEvent::DefaultColorsSet { foreground, background, special } => self.set_default_colors(foreground, background, special),
-            RedrawEvent::HighlightAttributesDefine { id, style } => self.define_style(id, style),
-            RedrawEvent::GridLine { row, column_start, cells, .. } => self.draw_grid_line(row, column_start, cells),
-            RedrawEvent::Clear { .. } => self.clear(),
-            RedrawEvent::CursorGoto { row, column, .. } => self.jump_cursor_to(row, column),
-            RedrawEvent::Scroll { top, bottom, left, right, rows, columns, .. } => self.scroll_region(top, bottom, left, right, rows, columns)
-        }
-    }
-
-    pub fn set_title(&mut self, title: String) {
-        self.title = title;
-    }
-
-    pub fn set_mode_list(&mut self, mode_list: Vec<ModeInfo>) {
-        self.mode_list = mode_list;
-    }
-
-    pub fn change_mode(&mut self, mode_index: u64) {
-        if let Some(ModeInfo { cursor_type, cursor_style_id })  = self.mode_list.get(mode_index as usize) {
-            if let Some(cursor_type) = cursor_type {
-                self.cursor_type = cursor_type.clone();
-            }
-
-            if let Some(cursor_style_id) = cursor_style_id {
-                self.cursor_style = self.defined_styles
-                    .get(cursor_style_id)
-                    .map(|style_reference| style_reference.clone());
-            }
-        }
-    }
-
-    pub fn set_cursor_enabled(&mut self, cursor_enabled: bool) {
-        self.cursor_enabled = cursor_enabled;
-    }
-
-    pub fn resize(&mut self, new_width: u64, new_height: u64) {
-        self.size = (new_width, new_height);
-    }
-
-    fn set_default_colors(&mut self, foreground: Color4f, background: Color4f, special: Color4f) {
-        self.default_colors = Colors::new(Some(foreground), Some(background), Some(special));
-    }
-
-    fn define_style(&mut self, id: u64, style: Style) {
-        self.defined_styles.insert(id, style);
-    }
-
     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()),
@@ -272,15 +141,16 @@ impl Editor {
         }
     }
 
+    fn resize(&mut self, new_size: (u64, u64)) {
+        self.size = new_size;
+        self.clear();
+    }
+
     fn clear(&mut self) {
         let (width, height) = self.size;
         self.grid = vec![vec![None; width as usize]; height as usize];
     }
 
-    fn jump_cursor_to(&mut self, row: u64, col: u64) {
-        self.cursor_pos = (row, col);
-    }
-
     fn scroll_region(&mut self, top: u64, bot: u64, left: u64, right: u64, rows: i64, cols: i64) {
         let (top, bot) =  if rows > 0 {
             (top as i64 + rows, bot as i64)
diff --git a/src/editor/style.rs b/src/editor/style.rs
new file mode 100644
index 0000000..7854137
--- /dev/null
+++ b/src/editor/style.rs
@@ -0,0 +1,49 @@
+use skulpin::skia_safe::Color4f;
+
+#[derive(new, PartialEq, Debug, Clone)]
+pub struct Colors {
+    pub foreground: Option<Color4f>,
+    pub background: Option<Color4f>,
+    pub special: Option<Color4f>
+}
+
+#[derive(new, Debug, Clone, PartialEq)]
+pub struct Style {
+    pub colors: Colors,
+    #[new(default)]
+    pub reverse: bool,
+    #[new(default)]
+    pub italic: bool,
+    #[new(default)]
+    pub bold: bool,
+    #[new(default)]
+    pub strikethrough: bool,
+    #[new(default)]
+    pub underline: bool,
+    #[new(default)]
+    pub undercurl: bool,
+    #[new(default)]
+    pub blend: u8
+}
+
+impl Style {
+    pub fn foreground(&self, default_colors: &Colors) -> Color4f {
+        if self.reverse {
+            self.colors.background.clone().unwrap_or(default_colors.background.clone().unwrap())
+        } else {
+            self.colors.foreground.clone().unwrap_or(default_colors.foreground.clone().unwrap())
+        }
+    }
+
+    pub fn background(&self, default_colors: &Colors) -> Color4f {
+        if self.reverse {
+            self.colors.foreground.clone().unwrap_or(default_colors.foreground.clone().unwrap())
+        } else {
+            self.colors.background.clone().unwrap_or(default_colors.background.clone().unwrap())
+        }
+    }
+
+    pub fn special(&self, default_colors: &Colors) -> Color4f {
+        self.colors.special.clone().unwrap_or(default_colors.special.clone().unwrap())
+    }
+}
diff --git a/src/events.rs b/src/events.rs
index 4a06802..0e9a6a7 100644
--- a/src/events.rs
+++ b/src/events.rs
@@ -4,7 +4,7 @@ use std::fmt;
 use rmpv::Value;
 use skulpin::skia_safe::Color4f;
 
-use crate::editor::{Colors, Style, ModeInfo, CursorType};
+use crate::editor::{Colors, Style, CursorMode, CursorShape};
 
 #[derive(Debug, Clone)]
 pub enum EventParseError {
@@ -46,12 +46,12 @@ pub struct GridLineCell {
 #[derive(Debug)]
 pub enum RedrawEvent {
     SetTitle { title: String },
-    ModeInfoSet { mode_list: Vec<ModeInfo> },
+    ModeInfoSet { cursor_modes: Vec<CursorMode> },
     ModeChange { mode_index: u64 },
     BusyStart,
     BusyStop,
     Resize { grid: u64, width: u64, height: u64 },
-    DefaultColorsSet { foreground: Color4f, background: Color4f, special: Color4f },
+    DefaultColorsSet { colors: Colors },
     HighlightAttributesDefine { id: u64, style: Style },
     GridLine { grid: u64, row: u64, column_start: u64, cells: Vec<GridLineCell> },
     Clear { grid: u64 },
@@ -125,26 +125,26 @@ fn parse_set_title(set_title_arguments: Vec<Value>) -> Result<RedrawEvent> {
 fn parse_mode_info_set(mode_info_set_arguments: Vec<Value>) -> Result<RedrawEvent> {
     if let [_cursor_style_enabled, mode_info] = mode_info_set_arguments.as_slice() {
         let mode_info_values = parse_array(&mode_info)?;
-        let mut mode_list = Vec::new();
+        let mut cursor_modes = Vec::new();
         for mode_info_value in mode_info_values {
             let info_map = parse_map(&mode_info_value)?;
-            let mut mode_info = ModeInfo::new();
+            let mut mode_info = CursorMode::new();
             for (name, value) in info_map {
                 let name = parse_string(&name)?;
                 match name.as_ref() {
                     "cursor_shape" => {
-                        mode_info.cursor_type = CursorType::from_type_name(&parse_string(&value)?);
+                        mode_info.shape = CursorShape::from_type_name(&parse_string(&value)?);
                     },
                     "attr_id" => {
-                        mode_info.cursor_style_id = Some(parse_u64(&value)?);
+                        mode_info.style_id = Some(parse_u64(&value)?);
                     },
                     _ => {}
                 }
             }
-            mode_list.push(mode_info);
+            cursor_modes.push(mode_info);
         }
         Ok(RedrawEvent::ModeInfoSet {
-            mode_list
+            cursor_modes
         })
     } else {
         Err(EventParseError::InvalidEventFormat)
@@ -176,9 +176,11 @@ fn parse_default_colors(default_colors_arguments: Vec<Value>) -> Result<RedrawEv
         foreground, background, special, _term_foreground, _term_background
     ] = default_colors_arguments.as_slice() {
         Ok(RedrawEvent::DefaultColorsSet {
-            foreground: unpack_color(parse_u64(&foreground)?),
-            background: unpack_color(parse_u64(&background)?),
-            special: unpack_color(parse_u64(special)?),
+            colors: Colors {
+                foreground: Some(unpack_color(parse_u64(&foreground)?)),
+                background: Some(unpack_color(parse_u64(&background)?)),
+                special: Some(unpack_color(parse_u64(special)?)),
+            }
         })
     } else {
         Err(EventParseError::InvalidEventFormat)
diff --git a/src/main.rs b/src/main.rs
index 495df74..e45cc3d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,4 @@
-// #![windows_subsystem = "windows"]
+#![windows_subsystem = "windows"]
 
 mod editor;
 mod events;
diff --git a/src/renderer/mod.rs b/src/renderer/mod.rs
index 1f8f2ea..9047849 100644
--- a/src/renderer/mod.rs
+++ b/src/renderer/mod.rs
@@ -3,12 +3,11 @@ use skulpin::skia_safe::{Canvas, Paint, Rect, Typeface, Font, FontStyle, colors}
 
 mod caching_shaper;
 mod fps_tracker;
-mod font_measurer;
 
 use caching_shaper::CachingShaper;
 use fps_tracker::FpsTracker;
 
-use crate::editor::{Editor, CursorType, Style, Colors};
+use crate::editor::{Editor, CursorShape, Style, Colors};
 
 const FONT_NAME: &str = "Delugia Nerd Font";
 const FONT_SIZE: f32 = 14.0;
@@ -90,17 +89,13 @@ impl Renderer {
     }
 
     pub fn draw(&mut self, canvas: &mut Canvas) {
-        let (draw_commands, default_colors, (width, height), cursor_grid_pos, cursor_type, cursor_foreground, cursor_background, cursor_enabled) = {
+        let (draw_commands, default_colors, (width, height), cursor) = {
             let editor = self.editor.lock().unwrap();
             (
                 editor.build_draw_commands().clone(), 
                 editor.default_colors.clone(), 
                 editor.size.clone(),
-                editor.cursor_pos.clone(), 
-                editor.cursor_type.clone(),
-                editor.cursor_foreground(),
-                editor.cursor_background(),
-                editor.cursor_enabled
+                editor.cursor.clone()
             )
         };
 
@@ -116,7 +111,7 @@ impl Renderer {
         self.fps_tracker.record_frame();
         self.draw_text(canvas, &self.fps_tracker.fps.to_string(), (width - 2, height - 1), &Style::new(default_colors.clone()), &default_colors, false);
 
-        let (cursor_grid_x, cursor_grid_y) = cursor_grid_pos;
+        let (cursor_grid_x, cursor_grid_y) = cursor.position;
         let target_cursor_x = cursor_grid_x as f32 * self.font_width;
         let target_cursor_y = cursor_grid_y as f32 * self.font_height;
         let (previous_cursor_x, previous_cursor_y) = self.cursor_pos;
@@ -125,21 +120,21 @@ impl Renderer {
         let cursor_y = (target_cursor_y - previous_cursor_y) * 0.5 + previous_cursor_y;
 
         self.cursor_pos = (cursor_x, cursor_y);
-        if cursor_enabled {
-            let cursor_width = match cursor_type {
-                CursorType::Vertical => self.font_width / 8.0,
-                CursorType::Horizontal | CursorType::Block => self.font_width
+        if cursor.enabled {
+            let cursor_width = match cursor.shape {
+                CursorShape::Vertical => self.font_width / 8.0,
+                CursorShape::Horizontal | CursorShape::Block => self.font_width
             };
-            let cursor_height = match cursor_type {
-                CursorType::Horizontal => self.font_width / 8.0,
-                CursorType::Vertical | CursorType::Block => self.font_height
+            let cursor_height = match cursor.shape {
+                CursorShape::Horizontal => self.font_width / 8.0,
+                CursorShape::Vertical | CursorShape::Block => self.font_height
             };
-            let cursor = Rect::new(cursor_x, cursor_y, cursor_x + cursor_width, cursor_y + cursor_height);
-            self.paint.set_color(cursor_background.to_color());
-            canvas.draw_rect(cursor, &self.paint);
+            let cursor_region = Rect::new(cursor_x, cursor_y, cursor_x + cursor_width, cursor_y + cursor_height);
+            self.paint.set_color(cursor.background(&default_colors).to_color());
+            canvas.draw_rect(cursor_region, &self.paint);
 
-            if let CursorType::Block = cursor_type {
-                self.paint.set_color(cursor_foreground.to_color());
+            if let CursorShape::Block = cursor.shape {
+                self.paint.set_color(cursor.foreground(&default_colors).to_color());
                 let editor = self.editor.lock().unwrap();
                 let character = editor.grid[cursor_grid_y as usize][cursor_grid_x as usize].clone()
                     .map(|(character, _)| character)