Make frames serializable 📚

This also makes serialization support non-optional since it's too much feature-management for too little benefit.

3 files changed, 20 insertions, 13 deletions

diff --git a/src/layout/background.rs b/src/layout/background.rs
index d3408182..515eef71 100644
--- a/src/layout/background.rs
+++ b/src/layout/background.rs
@@ -12,7 +12,7 @@ pub struct BackgroundNode {
 }
 
 /// The kind of shape to use as a background.
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
 pub enum BackgroundShape {
     Rect,
     Ellipse,
diff --git a/src/layout/frame.rs b/src/layout/frame.rs
index 21fdbf28..24ba65ce 100644
--- a/src/layout/frame.rs
+++ b/src/layout/frame.rs
@@ -1,12 +1,13 @@
 use fontdock::FaceId;
-use ttf_parser::GlyphId;
 
 use crate::color::Color;
 use crate::env::ResourceId;
 use crate::geom::{Length, Path, Point, Size};
 
+use serde::{Deserialize, Serialize};
+
 /// A finished layout with elements at fixed positions.
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct Frame {
     /// The size of the frame.
     pub size: Size,
@@ -37,7 +38,7 @@ impl Frame {
 }
 
 /// The building block frames are composed of.
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub enum Element {
     /// Shaped text.
     Text(Text),
@@ -48,7 +49,7 @@ pub enum Element {
 }
 
 /// A run of shaped text.
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct Text {
     /// The font face the glyphs are contained in.
     pub face_id: FaceId,
@@ -61,10 +62,10 @@ pub struct Text {
 }
 
 /// A glyph in a run of shaped text.
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq, Serialize, Deserialize)]
 pub struct Glyph {
     /// The glyph's ID in the face.
-    pub id: GlyphId,
+    pub id: u16,
     /// The advance width of the glyph.
     pub x_advance: Length,
     /// The horizontal offset of the glyph.
@@ -76,7 +77,7 @@ impl Text {
     pub fn encode_glyphs_be(&self) -> Vec<u8> {
         let mut bytes = Vec::with_capacity(2 * self.glyphs.len());
         for glyph in &self.glyphs {
-            let id = glyph.id.0;
+            let id = glyph.id;
             bytes.push((id >> 8) as u8);
             bytes.push((id & 0xff) as u8);
         }
@@ -85,7 +86,7 @@ impl Text {
 }
 
 /// A shape with some kind of fill.
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct Geometry {
     /// The shape to draw.
     pub shape: Shape,
@@ -98,7 +99,7 @@ pub struct Geometry {
 }
 
 /// Some shape.
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub enum Shape {
     /// A rectangle with its origin in the topleft corner.
     Rect(Size),
@@ -109,7 +110,7 @@ pub enum Shape {
 }
 
 /// The kind of graphic fill to be applied to a [`Shape`].
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq, Serialize, Deserialize)]
 pub enum Fill {
     /// The fill is a color.
     Color(Color),
@@ -118,7 +119,7 @@ pub enum Fill {
 }
 
 /// An image element.
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq, Serialize, Deserialize)]
 pub struct Image {
     /// The image resource.
     pub res: ResourceId,
diff --git a/src/layout/shaping.rs b/src/layout/shaping.rs
index faa178d3..47d19a62 100644
--- a/src/layout/shaping.rs
+++ b/src/layout/shaping.rs
@@ -18,6 +18,7 @@ use crate::util::SliceExt;
 /// This type contains owned or borrowed shaped text runs, which can be
 /// measured, used to reshape substrings more quickly and converted into a
 /// frame.
+#[derive(Clone)]
 pub struct ShapedText<'a> {
     /// The text that was shaped.
     pub text: &'a str,
@@ -53,6 +54,7 @@ pub struct ShapedGlyph {
 }
 
 /// A visual side.
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
 enum Side {
     Left,
     Right,
@@ -77,7 +79,11 @@ impl<'a> ShapedText<'a> {
             for glyph in group {
                 let x_advance = face.convert(glyph.x_advance).scale(self.props.size);
                 let x_offset = face.convert(glyph.x_offset).scale(self.props.size);
-                text.glyphs.push(Glyph { id: glyph.glyph_id, x_advance, x_offset });
+                text.glyphs.push(Glyph {
+                    id: glyph.glyph_id.0,
+                    x_advance,
+                    x_offset,
+                });
                 offset += x_advance;
             }