refactoring

src/lib.rs

@@ -4,12 +4,12 @@ use plotters_canvas::CanvasBackend;
 use std::panic;
 use wasm_bindgen::prelude::*;
 use web_sys::HtmlCanvasElement;
+mod misc;
+use crate::misc::{Chart, DrawResult};
 
 #[global_allocator]
 static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
 
-pub type DrawResult<T> = Result<T, Box<dyn std::error::Error>>;
-
 #[wasm_bindgen]
 extern "C" {
     // Use `js_namespace` here to bind `console.log(..)` instead of just
@@ -18,18 +18,7 @@ extern "C" {
     fn log(s: &str);
 }
 
-/// Result of screen to chart coordinates conversion.
+// Manages Chart generation and caching of values
-#[wasm_bindgen]
-pub struct Point {
-    pub x: f32,
-    pub y: f32,
-}
-
-#[wasm_bindgen]
-impl Point {
-    pub fn new(x: f32, y: f32) -> Self { Self { x, y } }
-}
-
 #[wasm_bindgen]
 pub struct ChartManager {
     func_str: String,
@@ -69,6 +58,7 @@ impl ChartManager {
     // Used in order to hook into `panic!()` to log in the browser's console
     pub fn init_panic_hook() { panic::set_hook(Box::new(console_error_panic_hook::hook)); }
 
+    #[inline(always)]
     fn get_back_cache(&self) -> Vec<(f32, f32)> {
         log("Using back_cache");
         match &self.back_cache {
@@ -77,6 +67,7 @@ impl ChartManager {
         }
     }
 
+    #[inline(always)]
     fn get_front_cache(&self) -> (Vec<(f32, f32, f32)>, f32) {
         log("Using front_cache");
         match &self.front_cache {
@@ -85,6 +76,7 @@ impl ChartManager {
         }
     }
 
+    #[inline(always)]
     fn draw(
         &mut self, element: HtmlCanvasElement,
     ) -> DrawResult<(impl Fn((i32, i32)) -> Option<(f32, f32)>, f32)> {
@@ -229,18 +221,3 @@ impl ChartManager {
         (data2, area)
     }
 }
-
-#[wasm_bindgen]
-pub struct Chart {
-    convert: Box<dyn Fn((i32, i32)) -> Option<(f32, f32)>>,
-    area: f32,
-}
-
-#[wasm_bindgen]
-impl Chart {
-    pub fn get_area(&self) -> f32 { self.area }
-
-    pub fn coord(&self, x: i32, y: i32) -> Option<Point> {
-        (self.convert)((x, y)).map(|(x, y)| Point::new(x, y))
-    }
-}

src/misc.rs

@@ -0,0 +1,30 @@
+use wasm_bindgen::prelude::*;
+
+pub type DrawResult<T> = Result<T, Box<dyn std::error::Error>>;
+
+/// Result of screen to chart coordinates conversion.
+#[wasm_bindgen]
+pub struct Point {
+    pub x: f32,
+    pub y: f32,
+}
+
+#[wasm_bindgen]
+impl Point {
+    pub fn new(x: f32, y: f32) -> Self { Self { x, y } }
+}
+
+#[wasm_bindgen]
+pub struct Chart {
+    pub(crate) convert: Box<dyn Fn((i32, i32)) -> Option<(f32, f32)>>,
+    pub(crate) area: f32,
+}
+
+#[wasm_bindgen]
+impl Chart {
+    pub fn get_area(&self) -> f32 { self.area }
+
+    pub fn coord(&self, x: i32, y: i32) -> Option<Point> {
+        (self.convert)((x, y)).map(|(x, y)| Point::new(x, y))
+    }
+}