...

src/lsp/types.zig

@@ -255,6 +255,23 @@ pub fn locationJson(allocator: std.mem.Allocator, uri: []const u8, range: Range)
     );
 }
 
+/// Build a LocationLink JSON response (for go-to-definition with origin range).
+pub fn locationLinkJson(allocator: std.mem.Allocator, target_uri: []const u8, target_range: Range, origin_range: Range) ![]const u8 {
+    const uri_escaped = try jsonString(allocator, target_uri);
+    return std.fmt.allocPrint(allocator,
+        "[{{\"originSelectionRange\":{{\"start\":{{\"line\":{d},\"character\":{d}}},\"end\":{{\"line\":{d},\"character\":{d}}}}}," ++
+            "\"targetUri\":{s}," ++
+            "\"targetRange\":{{\"start\":{{\"line\":{d},\"character\":{d}}},\"end\":{{\"line\":{d},\"character\":{d}}}}}," ++
+            "\"targetSelectionRange\":{{\"start\":{{\"line\":{d},\"character\":{d}}},\"end\":{{\"line\":{d},\"character\":{d}}}}}}}]",
+        .{
+            origin_range.start.line, origin_range.start.character, origin_range.end.line, origin_range.end.character,
+            uri_escaped,
+            target_range.start.line, target_range.start.character, target_range.end.line, target_range.end.character,
+            target_range.start.line, target_range.start.character, target_range.end.line, target_range.end.character,
+        },
+    );
+}
+
 /// Build a Hover JSON response.
 pub fn hoverJson(allocator: std.mem.Allocator, contents: []const u8) ![]const u8 {
     const escaped = try jsonString(allocator, contents);