Fix duplication of tailwind classes on edges.

CHANGELOG.md

@@ -5,9 +5,11 @@
 * Support rendering tooltips. ([#26][#26])
 * Add focus outlines around nodes and edges. ([#27][#27])
 * Update `stroke_style: dashed` to mean `dasharray:4`. ([#27][#27])
+* Fix duplication of tailwind classes on edges. ([#28][#28])
 
 [#26]: https://github.com/azriel91/disposition/pull/26
 [#27]: https://github.com/azriel91/disposition/pull/27
+[#28]: https://github.com/azriel91/disposition/pull/28
 
 
 ## 0.1.0 (2026-04-11)

app/playground/src/components/editor/render_options_page.rs

@@ -29,9 +29,9 @@ const RADIO_LABEL_CLASS: &str = "\
 ///
 /// Allows the user to configure:
 ///
-/// * `edge_curvature` -- whether edges are drawn as smooth curves or orthogonal
+/// * `edge_curvature`: whether edges are drawn as smooth curves or orthogonal
 ///   lines.
-/// * `rank_dir` -- direction that edges connect nodes.
+/// * `rank_dir`: direction that edges connect nodes.
 #[component]
 pub fn RenderOptionsPage(input_diagram: Signal<InputDiagram<'static>>) -> Element {
     let edge_curvature = input_diagram.read().render_options.edge_curvature;

app/playground/src/editor_state.rs

@@ -47,11 +47,10 @@ pub struct EditorState {
     ///
     /// # Examples
     ///
-    /// * `Some("proc_app_dev")` -- focus the process card with ID
-    ///   `proc_app_dev`.
-    /// * `Some("proc_app_dev_step_2")` -- expand the `proc_app_dev` card, then
+    /// * `Some("proc_app_dev")`: focus the process card with ID `proc_app_dev`.
+    /// * `Some("proc_app_dev_step_2")`: expand the `proc_app_dev` card, then
     ///   focus the third step row inside it.
-    /// * `None` -- no field to focus (the default).
+    /// * `None`: no field to focus (the default).
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub focus_field: Option<String>,
 
@@ -63,8 +62,8 @@ pub struct EditorState {
     ///
     /// # Examples
     ///
-    /// * `true` -- the SVG preview fills the page on load.
-    /// * `false` -- normal editor layout (the default).
+    /// * `true`: the SVG preview fills the page on load.
+    /// * `false`: normal editor layout (the default).
     #[serde(default, skip_serializing_if = "is_false")]
     pub svg_preview_expanded: bool,
 

app/playground/src/undo_history.rs

@@ -31,10 +31,10 @@ const MAX_ENTRIES: usize = 200;
 ///
 /// # Fields
 ///
-/// * `entries` -- the ordered list of snapshots, oldest first.
-/// * `cursor` -- index into `entries` that represents the *current* state. Undo
+/// * `entries`: the ordered list of snapshots, oldest first.
+/// * `cursor`: index into `entries` that represents the *current* state. Undo
 ///   moves the cursor backwards; redo moves it forwards.
-/// * `skip_next_push` -- flag used to prevent the memo that watches the
+/// * `skip_next_push`: flag used to prevent the memo that watches the
 ///   `input_diagram` signal from recording a snapshot when the change was
 ///   caused by an undo/redo operation itself.
 #[derive(Clone, Debug)]

crate/input_ir_rt/src/input_diagram_theme_sources.rs

@@ -8,8 +8,8 @@ use crate::ThemeValueSource;
 ///
 /// For each theme map entry, the source is:
 ///
-/// * `UserInput` -- if the key is present in the overlay diagram.
-/// * `BaseDiagram` -- if the key is only present in the base diagram.
+/// * `UserInput`: if the key is present in the overlay diagram.
+/// * `BaseDiagram`: if the key is only present in the base diagram.
 ///
 /// The computation is done on-the-fly by checking the overlay diagram.
 /// Since the overlay is typically small, this is efficient.
@@ -44,8 +44,8 @@ impl<'a> InputDiagramThemeSources<'a> {
     ///
     /// # Parameters
     ///
-    /// * `base` -- the base diagram, typically from `InputDiagram::base()`.
-    /// * `overlay` -- the user's overlay diagram before merging.
+    /// * `base`: the base diagram, typically from `InputDiagram::base()`.
+    /// * `overlay`: the user's overlay diagram before merging.
     pub fn new(base: &'a InputDiagram<'static>, overlay: &'a InputDiagram<'static>) -> Self {
         Self { base, overlay }
     }

crate/input_ir_rt/src/input_to_ir_diagram_mapper/tailwind_class_state.rs

@@ -14,7 +14,7 @@ const CLASSES_BUFFER_WRITE_FAIL: &str = "Failed to write string to buffer";
 ///
 /// This struct holds a map of [`ThemeAttr`] to their resolved string values,
 /// which are then used to generate the appropriate tailwind CSS classes.
-#[derive(Default)]
+#[derive(Clone, Default)]
 pub(crate) struct TailwindClassState<'tw_state> {
     /// Map of theme attributes to their resolved values.
     pub(crate) attrs: Map<ThemeAttr, Cow<'tw_state, str>>,