LSP: Fix spec violations that break the VSCode outline

modules/gdscript/language_server/gdscript_extend_parser.cpp

@@ -57,6 +57,12 @@ lsp::Position GodotPosition::to_lsp(const Vector<String> &p_lines) const {
 		return res;
 	}
 	res.line = line - 1;
+
+	// Special case: `column = 0` -> Starts at beginning of line.
+	if (column <= 0) {
+		return res;
+	}
+
 	// Note: character outside of `pos_line.length()-1` is valid.
 	res.character = column - 1;
 
@@ -238,9 +244,12 @@ void ExtendGDScriptParser::parse_class_symbol(const GDScriptParser::ClassNode *p
 	r_symbol.kind = lsp::SymbolKind::Class;
 	r_symbol.deprecated = false;
 	r_symbol.range = range_of_node(p_class);
-	r_symbol.range.start.line = MAX(r_symbol.range.start.line, 0);
 	if (p_class->identifier) {
 		r_symbol.selectionRange = range_of_node(p_class->identifier);
+	} else {
+		// No meaningful `selectionRange`, but we must ensure that it is inside of `range`.
+		r_symbol.selectionRange.start = r_symbol.range.start;
+		r_symbol.selectionRange.end = r_symbol.range.start;
 	}
 	r_symbol.detail = "class " + r_symbol.name;
 	{

modules/gdscript/tests/scripts/lsp/first_line_comment.gd

@@ -0,0 +1,2 @@
+# Some comment
+extends Node

modules/gdscript/tests/test_lsp.h

@@ -375,6 +375,18 @@ func f():
 			gd.to_lsp(lines);
 		}
 
+		SUBCASE("special case: zero column for root class") {
+			GodotPosition gd(1, 0);
+			lsp::Position expected = lsp_pos(0, 0);
+			lsp::Position actual = gd.to_lsp(lines);
+			CHECK_EQ(actual, expected);
+		}
+		SUBCASE("special case: zero line and column for root class") {
+			GodotPosition gd(0, 0);
+			lsp::Position expected = lsp_pos(0, 0);
+			lsp::Position actual = gd.to_lsp(lines);
+			CHECK_EQ(actual, expected);
+		}
 		SUBCASE("special case: negative line for root class") {
 			GodotPosition gd(-1, 0);
 			lsp::Position expected = lsp_pos(0, 0);
@@ -468,6 +480,25 @@ func f():
 			test_resolve_symbols(uri, all_test_data, all_test_data);
 		}
 
+		memdelete(proto);
+		finish_language();
+	}
+	TEST_CASE("[workspace][document_symbol]") {
+		GDScriptLanguageProtocol *proto = initialize(root);
+		REQUIRE(proto);
+
+		SUBCASE("selectionRange of root class must be inside range") {
+			String path = "res://lsp/first_line_comment.gd";
+			assert_no_errors_in(path);
+			GDScriptLanguageProtocol::get_singleton()->get_workspace()->parse_local_script(path);
+			ExtendGDScriptParser *parser = GDScriptLanguageProtocol::get_singleton()->get_workspace()->parse_results[path];
+			REQUIRE(parser);
+			lsp::DocumentSymbol cls = parser->get_symbols();
+
+			REQUIRE(((cls.range.start.line == cls.selectionRange.start.line && cls.range.start.character <= cls.selectionRange.start.character) || (cls.range.start.line < cls.selectionRange.start.line)));
+			REQUIRE(((cls.range.end.line == cls.selectionRange.end.line && cls.range.end.character >= cls.selectionRange.end.character) || (cls.range.end.line > cls.selectionRange.end.line)));
+		}
+
 		memdelete(proto);
 		finish_language();
 	}