[egui] Derive Serialize/Deserialize for a bunch of things

egui/Cargo.toml

@@ -23,7 +23,7 @@ ahash = { version = "0.6", features = ["std"], default-features = false }
 atomic_refcell = { version = "0.1", optional = true } # Used instead of parking_lot when you are always using Egui in a single thread. About as fast as parking_lot. Panics on multi-threaded use of egui::Context.
 parking_lot = { version = "0.11", optional = true } # Using parking_lot over std::sync::Mutex gives 50% speedups in some real-world scenarios
 rusttype = "0.9"
-serde = { version = "1", features = ["derive"], optional = true }
+serde = { version = "1", features = ["derive", "rc"], optional = true }
 
 [features]
 default = ["atomic_refcell", "default_fonts"]

egui/src/context.rs

@@ -15,6 +15,8 @@ use crate::{
 // ----------------------------------------------------------------------------
 
 #[derive(Clone, Debug, Default)]
+#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
+#[cfg_attr(feature = "serde", serde(default))]
 struct Options {
     /// The default style for new `Ui`:s.
     style: Arc<Style>,

egui/src/paint/fonts.rs

@@ -45,7 +45,8 @@ impl TextStyle {
 
 /// Which style of font: [`Monospace`][`FontFamily::Monospace`] or [`Proportional`][`FontFamily::Proportional`].
 #[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
-// #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
+#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
+#[cfg_attr(feature = "serde", serde(rename_all = "snake_case"))]
 pub enum FontFamily {
     /// A font where each character is the same width (`w` is the same width as `i`).
     Monospace,
@@ -80,12 +81,15 @@ fn rusttype_font_from_font_data(name: &str, data: &FontData) -> rusttype::Font<'
 /// ctx.set_fonts(fonts);
 /// ```
 #[derive(Clone, Debug, PartialEq)]
+#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
+#[cfg_attr(feature = "serde", serde(default))]
 pub struct FontDefinitions {
     /// List of font names and their definitions.
     /// The definition must be the contents of either a `.ttf` or `.otf` font file.
     ///
     /// Egui has built-in-default for these,
     /// but you can override them if you like.
+    #[cfg_attr(feature = "serde", serde(skip))]
     pub font_data: BTreeMap<String, FontData>,
 
     /// Which fonts (names) to use for each [`FontFamily`].

egui/src/paint/tessellator.rs

@@ -446,6 +446,8 @@ use self::PathType::{Closed, Open};
 
 /// Tessellation quality options
 #[derive(Clone, Copy, Debug)]
+#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
+#[cfg_attr(feature = "serde", serde(default))]
 pub struct TessellationOptions {
     /// Size of a pixel in points, e.g. 0.5
     pub aa_size: f32,

egui/src/style.rs

@@ -10,6 +10,7 @@ use crate::{
 /// Specifies the look and feel of a [`Ui`].
 #[derive(Clone, Debug, PartialEq)]
 #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
+#[cfg_attr(feature = "serde", serde(default))]
 pub struct Style {
     /// Default `TextStyle` for normal text (i.e. for `Label` and `TextEdit`).
     pub body_text_style: TextStyle,