1 files changed, 78 insertions, 2 deletions

diff --git a/src/parser/simplify.rs b/src/parser/simplify.rs
index 2743a69..8f0dd31 100644
--- a/src/parser/simplify.rs
+++ b/src/parser/simplify.rs
@@ -1,3 +1,24 @@
+/*
+http://docutils.sourceforge.net/docs/ref/rst/restructuredtext.html#hyperlink-targets
+
+Links can have internal or external targets.
+In the source, targets look like:
+
+	.. targetname1:
+	.. targetname2:
+
+	some paragraph or list item or so
+
+or:
+
+    .. targetname1:
+	.. targetname2: https://link
+
+There’s also anonymous links and targets without names.
+
+TODO: continue documenting how it’s done via http://svn.code.sf.net/p/docutils/code/trunk/docutils/docutils/transforms/references.py
+*/
+
 use std::collections::HashMap;
 
 use crate::target::Target;
@@ -5,10 +26,16 @@ use crate::document_tree::{
 	Document,
 	HasChildren,
 	attribute_types::ID,
+	elements as e,
 	element_categories as c,
 };
 
 
+enum MaybeDirectTarget {
+	IndirectTarget(ID),
+	DirectTarget(Target),
+}
+
 trait ResolvableRefs {
 	fn populate_targets(&self, refs: &mut HashMap<&ID, Target>);
 	fn resolve_refs(self, refs: &HashMap<&ID, Target>) -> Self;
@@ -23,12 +50,61 @@ pub fn resolve_references(mut doc: Document) -> Document {
 	Document::with_children(new)
 }
 
+fn sub_pop<P, C>(parent: &P, refs: &mut HashMap<&ID, Target>) where P: HasChildren<C>, C: ResolvableRefs {
+	for c in parent.children() {
+		c.populate_targets(&mut refs);
+	}
+}
+
+fn sub_res<P, C>(parent: P, refs: &HashMap<&ID, Target>) -> P where P: e::Element + HasChildren<C>, C: ResolvableRefs {
+	
+	let new: Vec<_> = parent.children_mut().drain(..).map(|c| c.resolve_refs(&refs)).collect();
+	parent.children_mut().extend(new);
+	parent
+}
+
 impl ResolvableRefs for c::StructuralSubElement {
 	fn populate_targets(&self, refs: &mut HashMap<&ID, Target>) {
-		//TODO
+		use c::StructuralSubElement::*;
+		match *self {
+			Title(e)        => sub_pop(&*e, refs),
+			Subtitle(e)     => sub_pop(&*e, refs),
+			Decoration(e)   => sub_pop(&*e, refs),
+			Docinfo(e)      => sub_pop(&*e, refs),
+			SubStructure(e) => e.populate_targets(refs),
+		}
 	}
 	fn resolve_refs(self, refs: &HashMap<&ID, Target>) -> Self {
-		self //TODO
+		use c::StructuralSubElement::*;
+		match self {
+			Title(e)        => sub_res(*e, refs).into(),
+			Subtitle(e)     => sub_res(*e, refs).into(),
+			Decoration(e)   => sub_res(*e, refs).into(),
+			Docinfo(e)      => sub_res(*e, refs).into(),
+			SubStructure(e) => e.resolve_refs(refs).into(),
+		}
 	}
 }
 
+impl ResolvableRefs for c::SubStructure {
+	fn populate_targets(&self, refs: &mut HashMap<&ID, Target>) {
+		use c::SubStructure::*;
+		match *self {
+			Topic(e) => sub_pop(&*e, refs),
+			Sidebar(e) => sub_pop(&*e, refs),
+			Transition(e) => sub_pop(&*e, refs),
+			Section(e) => sub_pop(&*e, refs),
+			BodyElement(e) => e.populate_targets(refs),
+		}
+	}
+	fn resolve_refs(self, refs: &HashMap<&ID, Target>) -> Self {
+		use c::SubStructure::*;
+		match self {
+			Topic(e) => sub_res(*e, refs).into(),
+			Sidebar(e) => sub_res(*e, refs).into(),
+			Transition(e) => sub_res(*e, refs).into(),
+			Section(e) => sub_res(*e, refs).into(),
+			BodyElement(e) => e.resolve_refs(refs).into(),
+		}
+	}
+}