tawasuyu/taffy

* Derive Serialize and Deserialize for CSS Grid types when the serde feature flag is enabled

* Remove Default implementation and serde(default) attributes

* Add CI job for serde feature (with default features)

* Re-add serde(default) attribute to Style

---------

Co-authored-by: Nico Burns <nico@nicoburns.com>

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d6bbf0ce6..2fc108e47 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,6 +37,21 @@ jobs:
         with:
           command: test
 
+  test-features-default-with-serde:
+    name: "Test Suite [Features: Default + serde]"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --features serde
+
   test-features-alloc:
     name: "Test Suite [Features: alloc]"
     runs-on: ubuntu-latest
diff --git a/src/compute/grid/types/coordinates.rs b/src/compute/grid/types/coordinates.rs
index 62525a8b6..cc8404ecb 100644
--- a/src/compute/grid/types/coordinates.rs
+++ b/src/compute/grid/types/coordinates.rs
@@ -13,6 +13,7 @@ use core::ops::{Add, AddAssign, Sub};
 ///     (and counts down from there)
 ///   - 0 is not a valid index
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[repr(transparent)]
 pub struct GridLine(i16);
 
diff --git a/src/geometry.rs b/src/geometry.rs
index 942cdd479..3db779ed1 100644
--- a/src/geometry.rs
+++ b/src/geometry.rs
@@ -10,7 +10,6 @@ use crate::axis::AbstractAxis;
 /// An axis-aligned UI rectangle
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(default))]
 pub struct Rect<T> {
     /// This can represent either the x-coordinate of the starting edge,
     /// or the amount of padding on the starting side.
@@ -241,7 +240,6 @@ impl<T: Add + Copy> Line<T> {
 /// The width and height of a [`Rect`]
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(default))]
 pub struct Size<T> {
     /// The x extent of the rectangle
     pub width: T,
@@ -457,6 +455,7 @@ impl Point<Option<f32>> {
 
 /// Generic struct which holds a "min" value and a "max" value
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct MinMax<Min, Max> {
     /// The value representing the minimum
     pub min: Min,
diff --git a/src/style/grid.rs b/src/style/grid.rs
index 4e84589d5..1053f74ff 100644
--- a/src/style/grid.rs
+++ b/src/style/grid.rs
@@ -238,6 +238,7 @@ impl Default for Line<GridPlacement> {
 /// on the size of it's contents, the amount of available space, and the sizing constraint the grid is being size under.
 /// See <https://developer.mozilla.org/en-US/docs/Web/CSS/grid-template-columns>
 #[derive(Copy, Clone, PartialEq, Debug)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum MaxTrackSizingFunction {
     /// Track maximum size should be a fixed points or percentage value
     Fixed(LengthPercentage),
@@ -362,6 +363,7 @@ impl MaxTrackSizingFunction {
 /// on the size of it's contents, the amount of available space, and the sizing constraint the grid is being size under.
 /// See <https://developer.mozilla.org/en-US/docs/Web/CSS/grid-template-columns>
 #[derive(Copy, Clone, PartialEq, Debug)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum MinTrackSizingFunction {
     /// Track minimum size should be a fixed points or percentage value
     Fixed(LengthPercentage),
@@ -492,6 +494,7 @@ impl FromFlex for NonRepeatedTrackSizingFunction {
 /// See <https://www.w3.org/TR/css-grid-1/#auto-repeat> for an explanation of how auto-repeated track definitions work
 /// and the difference between AutoFit and AutoFill.
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum GridTrackRepetition {
     /// Auto-repeating tracks should be generated to fit the container
     /// See: <https://developer.mozilla.org/en-US/docs/Web/CSS/repeat#auto-fill>
@@ -534,6 +537,7 @@ impl<'a> TryFrom<&'a str> for GridTrackRepetition {
 /// The sizing function for a grid track (row/column)
 /// See <https://developer.mozilla.org/en-US/docs/Web/CSS/grid-template-columns>
 #[derive(Clone, PartialEq, Debug)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum TrackSizingFunction {
     /// A single non-repeated track
     Single(NonRepeatedTrackSizingFunction),