Remove par nodes in favor of parbreaks 🔄

This basically reverts the earlier change from parbreaks to par nodes because:
- It is simpler and less nested
- It works way better with functions that layout their body inline like `font`, which where buggy before, previously

The original reasons for changing to par nodes were:
- the envisioned design of the layouter at that time (based on dynamic nodes etc.), which is not relevant anymore
- possibly existing benefits with regards to incremental compilation, which are unsure and outweighed by the immediate benefits of the parbreak-representation

1 files changed, 4 insertions, 9 deletions

diff --git a/src/layout/tree.rs b/src/layout/tree.rs
index e500c4ba..adc179bc 100644
--- a/src/layout/tree.rs
+++ b/src/layout/tree.rs
@@ -63,6 +63,10 @@ impl<'a> TreeLayouter<'a> {
         match &node.v {
             SyntaxNode::Spacing => self.layout_space(),
             SyntaxNode::Linebreak => self.layouter.finish_line(),
+            SyntaxNode::Parbreak => self.layouter.add_secondary_spacing(
+                self.style.text.paragraph_spacing(),
+                SpacingKind::PARAGRAPH,
+            ),
 
             SyntaxNode::ToggleItalic => {
                 self.style.text.italic = !self.style.text.italic;
@@ -80,7 +84,6 @@ impl<'a> TreeLayouter<'a> {
             }
 
             SyntaxNode::Raw(lines) => self.layout_raw(lines).await,
-            SyntaxNode::Par(par) => self.layout_par(par).await,
             SyntaxNode::Call(call) => {
                 self.layout_call(Spanned::new(call, node.span)).await;
             }
@@ -128,14 +131,6 @@ impl<'a> TreeLayouter<'a> {
         self.style.text.fallback = fallback;
     }
 
-    async fn layout_par(&mut self, par: &SyntaxTree) {
-        self.layout_tree(par).await;
-        self.layouter.add_secondary_spacing(
-            self.style.text.paragraph_spacing(),
-            SpacingKind::PARAGRAPH,
-        );
-    }
-
     async fn layout_call(&mut self, call: Spanned<&CallExpr>) {
         let ctx = LayoutContext {
             style: &self.style,