From 6d64d3e8e9123f3fa8166c8b710e2b2c61ed5898 Mon Sep 17 00:00:00 2001
From: Laurenz <laurmaedje@gmail.com>
Date: Fri, 17 Mar 2023 16:04:14 +0100
Subject: Query

---
 src/model/typeset.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/model')

diff --git a/src/model/typeset.rs b/src/model/typeset.rs
index 4c8be135..e9cb3d2c 100644
--- a/src/model/typeset.rs
+++ b/src/model/typeset.rs
@@ -166,6 +166,22 @@ impl Introspector {
         self.all().filter(|node| selector.matches(node)).collect()
     }
 
+    /// Query for all metadata matches before the given id.
+    pub fn query_split(
+        &self,
+        selector: Selector,
+        id: StableId,
+    ) -> (Vec<&Content>, Vec<&Content>) {
+        let mut iter = self.all();
+        let before = iter
+            .by_ref()
+            .take_while(|node| node.stable_id() != Some(id))
+            .filter(|node| selector.matches(node))
+            .collect();
+        let after = iter.filter(|node| selector.matches(node)).collect();
+        (before, after)
+    }
+
     /// Find the page number for the given stable id.
     pub fn page(&self, id: StableId) -> NonZeroUsize {
         self.location(id).page
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