Retain optional gradient stop values

crates/idml/src/model/mod.rs

@@ -19,8 +19,8 @@ mod story;
 
 pub use geometry::{MAX_PATH_POINTS, PathGeometry, PathGeometryError, PathPoint, SubPath};
 pub use resources::{
-    ColorGroup, ColorSpace, GradientStop, StrokeStyle, StrokeStyleKind, Style, StyleGroup, StyleKind, StyleNode, Swatch, SwatchKind, color_groups,
-    named, preference, stroke_styles, style_groups, swatches,
+    ColorGroup, ColorSpace, GradientStop, GradientStopValue, StrokeStyle, StrokeStyleKind, Style, StyleGroup, StyleKind, StyleNode, Swatch,
+    SwatchKind, color_groups, named, preference, stroke_styles, style_groups, swatches,
 };
 pub use spread::{Graphic, GraphicChild, GraphicKind, Guide, ItemChild, ItemKind, Link, Page, PageChild, PageItem, Spread, SpreadChild, spreads};
 pub use story::{Ace, CONTAINERS, Cell, Container, ContentPart, Range, Story, Table, TableChild, TextNode, stories};

crates/idml/src/model/resources.rs

@@ -238,6 +238,14 @@ pub struct GradientStop {
     pub midpoint: f64,
 }
 
+/// A `GradientStop` in source order, including optional values as written.
+#[derive(Clone, Debug, PartialEq)]
+pub struct GradientStopValue {
+    pub color: Option<String>,
+    pub location: Option<f64>,
+    pub midpoint: Option<f64>,
+}
+
 impl Swatch {
     pub fn to_el(&self) -> El {
         let mut el = self.values.element(self.kind.name());
@@ -296,6 +304,22 @@ impl Swatch {
             })
             .collect()
     }
+
+    /// Every gradient stop in source order, retaining absent or malformed optional values.
+    pub fn stops_in_order(&self) -> Vec<GradientStopValue> {
+        self.rest
+            .iter()
+            .filter(|e| e.local() == "GradientStop")
+            .map(|e| {
+                let values = Values::of(e);
+                GradientStopValue {
+                    color: values.get("StopColor").map(str::to_string),
+                    location: values.num("Location"),
+                    midpoint: values.num("Midpoint"),
+                }
+            })
+            .collect()
+    }
 }
 
 /// The swatches among `top`, in order.