Add HeapSizeOf implementation.

Cargo.toml

@@ -7,10 +7,22 @@ documentation = "http://doc.servo.org/euclid/"
 repository = "https://github.com/servo/euclid"
 license = "MIT / Apache-2.0"
 
+[features]
+heap_size = [ "heapsize", "heapsize_plugin" ]
+
 [dependencies]
 rustc-serialize = "0.3.2"
 rand = "0.3.7"
 num = "0.1.24"
 log = "0.3.1"
 serde = "*"
 serde_macros = "*"
+
+[dependencies.heapsize]
+version = "0.1.2"
+optional = true
+
+[dependencies.heapsize_plugin]
+version = "0.0.1"
+optional = true
+

src/length.rs

@@ -28,7 +28,10 @@ use std::marker::PhantomData;
 ///
 /// You can multiply a Length by a `scale_factor::ScaleFactor` to convert it from one unit to
 /// another.  See the ScaleFactor docs for an example.
+// Uncomment the derive, and remove the macro call, once heapsize gets
+// PhantomData<T> support.
 #[derive(Copy, RustcDecodable, RustcEncodable, Debug)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct Length<Unit, T>(pub T, PhantomData<Unit>);
 
 impl<Unit,T> Deserialize for Length<Unit,T> where T: Deserialize {

src/lib.rs

@@ -11,6 +11,12 @@
 
 #![plugin(serde_macros)]
 
+#![cfg_attr(feature = "heap_size", plugin(heapsize_plugin))]
+
+#[cfg(feature = "heap_size")]
+#[macro_use]
+extern crate heapsize;
+
 #[macro_use]
 extern crate log;
 extern crate rustc_serialize;

src/matrix.rs

@@ -12,6 +12,7 @@ use point::{Point2D, Point4D};
 
 
 #[derive(Debug, Copy, Clone, PartialEq, Deserialize, Serialize)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct Matrix4 {
     pub m11: f32, pub m12: f32, pub m13: f32, pub m14: f32,
     pub m21: f32, pub m22: f32, pub m23: f32, pub m24: f32,

src/matrix2d.rs

@@ -14,6 +14,7 @@ use size::Size2D;
 use std::ops::{Add, Mul, Sub};
 
 #[derive(Clone, Copy, Deserialize, Serialize)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct Matrix2D<T> {
     m11: T, m12: T,
     m21: T, m22: T,

src/point.rs

@@ -16,6 +16,7 @@ use std::fmt::{self, Formatter};
 use std::ops::{Add, Neg, Mul, Sub, Div};
 
 #[derive(Clone, Copy, RustcDecodable, RustcEncodable, Eq, Hash, PartialEq, Deserialize, Serialize)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct Point2D<T> {
     pub x: T,
     pub y: T
@@ -139,6 +140,7 @@ impl<Unit, T: NumCast + Clone> Point2D<Length<Unit, T>> {
 }
 
 #[derive(Clone, Copy, RustcDecodable, RustcEncodable, Eq, Hash, PartialEq)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct Point3D<T> {
     pub x: T,
     pub y: T,
@@ -198,6 +200,7 @@ impl <T:Clone + Neg<Output=T>> Neg for Point3D<T> {
 }
 
 #[derive(Clone, Copy, RustcDecodable, RustcEncodable, Eq, Hash, PartialEq)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct Point4D<T> {
     pub x: T,
     pub y: T,

src/rect.rs

@@ -18,6 +18,7 @@ use std::fmt::{self, Formatter};
 use std::ops::{Add, Sub, Mul, Div};
 
 #[derive(Clone, Copy, RustcDecodable, RustcEncodable, PartialEq, Deserialize, Serialize)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct Rect<T> {
     pub origin: Point2D<T>,
     pub size: Size2D<T>,

src/scale_factor.rs

@@ -34,9 +34,13 @@ use std::marker::PhantomData;
 /// let one_foot: Length<Inch, f32> = Length::new(12.0);
 /// let one_foot_in_mm: Length<Mm, f32> = one_foot * mm_per_inch;
 /// ```
+// Uncomment the derive, and remove the macro call, once heapsize gets
+// PhantomData<T> support.
 #[derive(Copy, RustcDecodable, RustcEncodable, Debug)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct ScaleFactor<Src, Dst, T>(pub T, PhantomData<(Src, Dst)>);
 
+
 impl<Src,Dst,T> Deserialize for ScaleFactor<Src,Dst,T> where T: Deserialize {
     fn deserialize<D>(deserializer: &mut D) -> Result<ScaleFactor<Src,Dst,T>,D::Error>
                       where D: Deserializer {

src/side_offsets.rs

@@ -16,6 +16,7 @@ use std::ops::Add;
 /// A group of side offsets, which correspond to top/left/bottom/right for borders, padding,
 /// and margins in CSS.
 #[derive(Clone, Copy, PartialEq, Debug, Deserialize, Serialize)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct SideOffsets2D<T> {
     pub top: T,
     pub right: T,
@@ -76,6 +77,7 @@ impl<T: Zero> SideOffsets2D<T> {
 /// A SIMD enabled version of SideOffsets2D specialized for i32.
 #[derive(Clone, Copy, PartialEq)]
 #[simd]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct SideOffsets2DSimdI32 {
     pub top: i32,
     pub bottom: i32,

src/size.rs

@@ -15,6 +15,7 @@ use std::fmt::{self, Formatter};
 use std::ops::{Mul, Div};
 
 #[derive(Clone, Copy, RustcDecodable, RustcEncodable, PartialEq, Deserialize, Serialize)]
+#[cfg_attr(feature = "heap_size", derive(HeapSizeOf))]
 pub struct Size2D<T> {
     pub width: T,
     pub height: T