Pass Summary::Context to Item::summarize (#18510)

We are going to use this in the multi-buffer to produce a summary for an
`Excerpt` that contains a `Range<Anchor>`.

Release Notes:

- N/A

Co-authored-by: Nathan <nathan@zed.dev>

crates/text/src/locator.rs

@@ -69,7 +69,7 @@ impl Default for Locator {
 impl sum_tree::Item for Locator {
     type Summary = Locator;
 
-    fn summary(&self) -> Self::Summary {
+    fn summary(&self, _cx: &()) -> Self::Summary {
         self.clone()
     }
 }

crates/text/src/operation_queue.rs

@@ -107,7 +107,7 @@ impl<'a> Dimension<'a, OperationSummary> for OperationKey {
 impl<T: Operation> Item for OperationItem<T> {
     type Summary = OperationSummary;
 
-    fn summary(&self) -> Self::Summary {
+    fn summary(&self, _cx: &()) -> Self::Summary {
         OperationSummary {
             key: OperationKey::new(self.0.lamport_timestamp()),
             len: 1,

crates/text/src/text.rs

@@ -2617,7 +2617,7 @@ impl Fragment {
 impl sum_tree::Item for Fragment {
     type Summary = FragmentSummary;
 
-    fn summary(&self) -> Self::Summary {
+    fn summary(&self, _cx: &Option<clock::Global>) -> Self::Summary {
         let mut max_version = clock::Global::new();
         max_version.observe(self.timestamp);
         for deletion in &self.deletions {
@@ -2688,7 +2688,7 @@ impl Default for FragmentSummary {
 impl sum_tree::Item for InsertionFragment {
     type Summary = InsertionFragmentKey;
 
-    fn summary(&self) -> Self::Summary {
+    fn summary(&self, _cx: &()) -> Self::Summary {
         InsertionFragmentKey {
             timestamp: self.timestamp,
             split_offset: self.split_offset,
@@ -2700,7 +2700,7 @@ impl sum_tree::KeyedItem for InsertionFragment {
     type Key = InsertionFragmentKey;
 
     fn key(&self) -> Self::Key {
-        sum_tree::Item::summary(self)
+        sum_tree::Item::summary(self, &())
     }
 }
 

crates/text/src/undo_map.rs

@@ -11,7 +11,7 @@ struct UndoMapEntry {
 impl sum_tree::Item for UndoMapEntry {
     type Summary = UndoMapKey;
 
-    fn summary(&self) -> Self::Summary {
+    fn summary(&self, _cx: &()) -> Self::Summary {
         self.key
     }
 }