void visitAdjacentStrings()

in lib/src/source_visitor.dart [222:289]
36 lines of code
18 McCabe index (conditional complexity)

  void visitAdjacentStrings(AdjacentStrings node) {
    // We generally want to indent adjacent strings because it can be confusing
    // otherwise when they appear in a list of expressions, like:
    //
    //     [
    //       "one",
    //       "two"
    //       "three",
    //       "four"
    //     ]
    //
    // Especially when these stings are longer, it can be hard to tell that
    // "three" is a continuation of the previous argument.
    //
    // However, the indentation is distracting in argument lists that don't
    // suffer from this ambiguity:
    //
    //     test(
    //         "A very long test description..."
    //             "this indentation looks bad.", () { ... });
    //
    // To balance these, we omit the indentation when an adjacent string
    // expression is the only string in an argument list.
    var shouldNest = true;

    var parent = node.parent;
    if (parent is ArgumentList) {
      shouldNest = false;

      for (var argument in parent.arguments) {
        if (argument == node) continue;
        if (argument is StringLiteral) {
          shouldNest = true;
          break;
        }
      }
    } else if (parent is Assertion) {
      // Treat asserts like argument lists.
      shouldNest = false;
      if (parent.condition != node && parent.condition is StringLiteral) {
        shouldNest = true;
      }

      if (parent.message != node && parent.message is StringLiteral) {
        shouldNest = true;
      }
    } else if (parent is VariableDeclaration ||
        parent is AssignmentExpression &&
            parent.rightHandSide == node &&
            parent.parent is ExpressionStatement) {
      // Don't add extra indentation in a variable initializer or assignment:
      //
      //     var variable =
      //         "no extra"
      //         "indent";
      shouldNest = false;
    } else if (parent is NamedExpression || parent is ExpressionFunctionBody) {
      shouldNest = false;
    }

    builder.startSpan();
    builder.startRule();
    if (shouldNest) builder.nestExpression();
    visitNodes(node.strings, between: splitOrNewline);
    if (shouldNest) builder.unnest();
    builder.endRule();
    builder.endSpan();
  }