add prepare rename

1 files changed, 37 insertions, 1 deletions

diff --git a/src/server/requests.odin b/src/server/requests.odin
index 3ca38d6..2773dcc 100644
--- a/src/server/requests.odin
+++ b/src/server/requests.odin
@@ -275,6 +275,7 @@ call_map: map[string]proc(
 	"textDocument/inlayHint"            = request_inlay_hint,
 	"textDocument/documentLink"         = request_document_links,
 	"textDocument/rename"               = request_rename,
+	"textDocument/prepareRename"        = request_prepare_rename,
 	"textDocument/references"           = request_references,
 	"window/progress"                   = request_noop,
 	"workspace/symbol"                  = request_workspace_symbols,
@@ -802,7 +803,7 @@ request_initialize :: proc(
 					change = 2,
 					save = {includeText = true},
 				},
-				renameProvider = config.enable_rename,
+				renameProvider = RenameOptions{prepareProvider = true},
 				workspaceSymbolProvider = true,
 				referencesProvider = config.enable_references,
 				definitionProvider = true,
@@ -1491,6 +1492,41 @@ request_document_links :: proc(
 	return .None
 }
 
+request_prepare_rename :: proc(
+	params: json.Value,
+	id: RequestId,
+	config: ^common.Config,
+	writer: ^Writer,
+) -> common.Error {
+	params_object, ok := params.(json.Object)
+
+	if !ok {
+		return .ParseError
+	}
+
+	rename_param: PrepareRenameParams
+
+	if unmarshal(params, rename_param, context.temp_allocator) != nil {
+		return .ParseError
+	}
+
+	document := document_get(rename_param.textDocument.uri)
+
+	if document == nil {
+		return .InternalError
+	}
+
+	if range, ok := get_prepare_rename(document, rename_param.position); ok {
+		response := make_response_message(params = range, id = id)
+		send_response(response, writer)
+	} else {
+		response := make_response_message(params = nil, id = id)
+		send_response(response, writer)
+	}
+
+	return .None
+}
+
 request_rename :: proc(
 	params: json.Value,
 	id: RequestId,