simplification, stricter adherence to projectional editing approach

code_markup/src/markup/nodes.rs

@@ -468,3 +468,33 @@ pub fn join_mark_nodes_commas(
 
     mark_nodes.into_iter().interleave(join_nodes).collect()
 }
+
+pub fn mark_nodes_to_string(
+    markup_node_ids: &[MarkNodeId],
+    mark_node_pool: &SlowPool,
+) -> String {
+    let mut all_code_string = String::new();
+
+    for mark_node_id in markup_node_ids.iter() {
+        node_to_string_w_children(*mark_node_id, &mut all_code_string, mark_node_pool)
+    }
+
+    all_code_string
+}
+
+pub fn node_to_string_w_children(node_id: MarkNodeId, str_buffer: &mut String, mark_node_pool: &SlowPool) {
+    let node = mark_node_pool.get(node_id);
+
+    if node.is_nested() {
+        for child_id in node.get_children_ids() {
+            node_to_string_w_children(child_id, str_buffer, mark_node_pool);
+        }
+        for _ in 0..node.get_newlines_at_end() {
+            str_buffer.push('\n')
+        }
+    } else {
+        let node_content_str = node.get_full_content();
+
+        str_buffer.push_str(&node_content_str);
+    }
+}