[ty] Make range/position conversions fallible (#21297)

Co-authored-by: Aria Desires <aria.desires@gmail.com>

Author: MichaReiser

crates/ty_server/src/document/location.rs

@@ -20,7 +20,7 @@ pub(crate) trait ToLink {
 impl ToLink for NavigationTarget {
     fn to_location(&self, db: &dyn Db, encoding: PositionEncoding) -> Option<Location> {
         FileRange::new(self.file(), self.focus_range())
-            .as_lsp_range(db, encoding)
+            .to_lsp_range(db, encoding)?
             .to_location()
     }
 
@@ -35,17 +35,17 @@ impl ToLink for NavigationTarget {
         // Get target_range and URI together to ensure they're consistent (same cell for notebooks)
         let target_location = self
             .full_range()
-            .as_lsp_range(db, file, encoding)
-            .to_location()?;
+            .to_lsp_range(db, file, encoding)?
+            .into_location()?;
         let target_range = target_location.range;
 
         // For selection_range, we can use as_local_range since we know it's in the same document/cell
         let selection_range = self
             .focus_range()
-            .as_lsp_range(db, file, encoding)
-            .to_local_range();
+            .to_lsp_range(db, file, encoding)?
+            .local_range();
 
-        let src = src.map(|src| src.as_lsp_range(db, encoding).to_local_range());
+        let src = src.and_then(|src| Some(src.to_lsp_range(db, encoding)?.local_range()));
 
         Some(lsp_types::LocationLink {
             target_uri: target_location.uri,
@@ -58,7 +58,9 @@ impl ToLink for NavigationTarget {
 
 impl ToLink for ReferenceTarget {
     fn to_location(&self, db: &dyn Db, encoding: PositionEncoding) -> Option<Location> {
-        self.file_range().as_lsp_range(db, encoding).to_location()
+        self.file_range()
+            .to_lsp_range(db, encoding)?
+            .into_location()
     }
 
     fn to_link(
@@ -70,12 +72,12 @@ impl ToLink for ReferenceTarget {
         // Get target_range and URI together to ensure they're consistent (same cell for notebooks)
         let target_location = self
             .range()
-            .as_lsp_range(db, self.file(), encoding)
-            .to_location()?;
+            .to_lsp_range(db, self.file(), encoding)?
+            .into_location()?;
         let target_range = target_location.range;
         let selection_range = target_range;
 
-        let src = src.map(|src| src.as_lsp_range(db, encoding).to_local_range());
+        let src = src.and_then(|src| Some(src.to_lsp_range(db, encoding)?.local_range()));
 
         Some(lsp_types::LocationLink {
             target_uri: target_location.uri,