Create a render ast node type.

src/intermediate/footnote_definition.rs

@@ -5,7 +5,7 @@ use super::registry::Registry;
 use super::IElement;
 use super::IObject;
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub(crate) struct IFootnoteDefinition {}
 
 impl IFootnoteDefinition {
@@ -22,8 +22,8 @@ impl IFootnoteDefinition {
 
 #[derive(Debug)]
 pub(crate) struct IRealFootnoteDefinition {
-    footnote_id: usize,
-    contents: Vec<IAstNode>,
+    pub(crate) footnote_id: usize,
+    pub(crate) contents: Vec<IAstNode>,
 }
 
 impl IRealFootnoteDefinition {
@@ -37,4 +37,22 @@ impl IRealFootnoteDefinition {
             contents,
         })
     }
+
+    pub(crate) fn get_display_label(&self) -> String {
+        format!("{}", self.footnote_id + 1)
+    }
+
+    /// Get an ID to refer to the first reference to this footnote definition.
+    ///
+    /// This ID could, for example, be used for the id attribute in HTML for the reference anchor tag.
+    pub(crate) fn get_reference_id(&self) -> String {
+        format!("fnr.{}", self.get_display_label())
+    }
+
+    /// Get an ID to refer to the footnote definition.
+    ///
+    /// This ID could, for example, be used for the id attribute in HTML for the definition anchor tag.
+    pub(crate) fn get_definition_id(&self) -> String {
+        format!("fn.{}", self.get_display_label())
+    }
 }