From 4a3c5a48224cf542429504e8728e10c802e1fd52 Mon Sep 17 00:00:00 2001
From: Gabriel Schneider <gbrls@0x4200.cafe>
Date: Tue, 15 Sep 2026 18:27:49 -0300
Subject: Highlight exact source occurrences in LSP references and goto results

---
 src/lsp/lsp_zls.zig | 34 +++++++++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

(limited to 'src/lsp/lsp_zls.zig')

diff --git a/src/lsp/lsp_zls.zig b/src/lsp/lsp_zls.zig
index 47e6a165..68538125 100644
--- a/src/lsp/lsp_zls.zig
+++ b/src/lsp/lsp_zls.zig
@@ -512,7 +512,7 @@ fn rowForToken(arena: std.mem.Allocator, base: []const u8, th: Analyser.TokenWit
     if (th.token >= tree.tokens.len) return;
     const r = offsets.tokenToRange(tree, th.token, enc);
     const path = lsp.rel(base, th.handle.uri.toFsPath(arena) catch return);
-    try lsp.spanRow(out, path, r.start.line, r.start.character, r.end.line, r.end.character, lineAt(tree.source, r.start.line));
+    try lsp.sourceSpanRow(out, path, r.start.line, r.start.character, r.end.line, r.end.character, lineAt(tree.source, r.start.line));
 }
 
 // ---------------------------------------------------------------- goto
@@ -667,7 +667,7 @@ fn goto(
                 const t2 = &nd.handle.tree;
                 const rr = offsets.nodeToRange(t2, nd.node, enc);
                 const path = lsp.rel(base, nd.handle.uri.toFsPath(arena) catch continue);
-                try lsp.spanRow(out, path, rr.start.line, rr.start.character, rr.end.line, rr.end.character, lineAt(t2.source, rr.start.line));
+                try lsp.sourceSpanRow(out, path, rr.start.line, rr.start.character, rr.end.line, rr.end.character, lineAt(t2.source, rr.start.line));
             },
         }
     }
@@ -1165,7 +1165,7 @@ fn references(
             try lsp.edit(out, at, at + want.len);
         } else {
             const r = offsets.tokenToRange(tree, tok, enc);
-            try lsp.spanRow(out, path, r.start.line, r.start.character, r.end.line, r.end.character, lines.?.line(r.start.line));
+            try lsp.sourceSpanRow(out, path, r.start.line, r.start.character, r.end.line, r.end.character, lines.?.line(r.start.line));
         }
     }
 }
@@ -1474,3 +1474,31 @@ test "LSP ZLS rename refuses a partial edit set beyond its row budget" {
         }
     }
 }
+
+test "LSP source snippets retain native definition and reference indentation" {
+    const source = "const Outer = struct {\n" ++
+        "\t  const value: u32 = 1;\n" ++
+        "\t  fn use() void {\n" ++
+        "\t\t_ = value;\n" ++
+        "\t  }\n" ++
+        "};\n";
+    const gpa = std.testing.allocator;
+    for ([_]lsp.Kind{ .definition, .declaration, .references }) |kind| {
+        var arena: std.heap.ArenaAllocator = .init(gpa);
+        defer arena.deinit();
+        var out: std.Io.Writer.Allocating = .init(gpa);
+        defer out.deinit();
+        try query(gpa, arena.allocator(), .{
+            .kind = kind,
+            .path = "/source-snippet.zig",
+            .root = "/",
+            .source = source,
+            .offset = @intCast(std.mem.lastIndexOf(u8, source, "value").?),
+        }, &out.writer);
+        const definition = "source-snippet.zig:2:10-14 \t  const value: u32 = 1;\n";
+        try std.testing.expectEqualStrings(if (kind == .references)
+            definition ++ "source-snippet.zig:4:7-11 \t\t_ = value;\n"
+        else
+            definition, out.written());
+    }
+}
-- 
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