引用元素的XText格式规则

Question

我试图用一个简单的例子来描述这个问题。比方说，我有一个语法，看起来像这样：

Model:
    rules+=Rule*;

Rule:
    View | Element;

Element:
    'element' name=ID members+=Member members+=Member* 'end';

View:
    'view' name=ID 'for' forElement=[Element] 
    forMembers+=[Member] forMembers+=[Member]* 'end';

Member:
    'member' name=ID;

这种语言的一个简单例子是：

// Element is where the Members are instantiated
element Foo
    member bar
    member foobar
    member barfoo
    member something
end

// Views only reference the members by simple name
view FooView for Foo
    bar 
    foobar 
    something
end

我有一个自定义作用域提供程序，用于视图规则的for成员属性：

class MyDslScopeProvider extends AbstractDeclarativeScopeProvider {
    def scope_View_forMembers(View view, EReference reference) {
        Scopes.scopeFor(view.forElement.members);
    }
}

到目前为止一切都很好，我的问题是：

我也有一个格式化程序，我无法为引用的成员s添加规则：

class MyDslFormatter extends AbstractDeclarativeFormatter {

    @Inject extension MyDslGrammarAccess

    override protected void configureFormatting(FormattingConfig c) {

        // Rules for element: line breaks, indentation increment and decrement
        c.setLinewrap(1).after(elementAccess.nameAssignment_1)
        c.setLinewrap(1).after(elementRule)
        c.setIndentationIncrement.after(elementAccess.nameAssignment_1)
        c.setIndentationDecrement.before(elementAccess.endKeyword_4)

        // Rules for view: line breaks, indentation increment and decrement
        c.setLinewrap(1).after(viewAccess.forElementElementCrossReference_3_0)
        c.setLinewrap(1).after(viewRule)
        c.setIndentationIncrement.after(viewAccess.forElementElementCrossReference_3_0)
        c.setIndentationDecrement.before(viewAccess.endKeyword_6)

        //formatting for Member rule, only works, where Member rules are instantiated.
        c.setLinewrap(1).after(memberRule)
    }
}

如您所见，我已经为Element和View规则以及成员规则设置了格式。然而，成员规则的格式仅应用于实例化的地方（例如：Element声明）。当我运行此格式器（CtrlShiftF）时，我得到以下格式：

element Foo
    member bar
    member foobar
    member barfoo
    member something
end
view FooView for Foo
    bar foobar something end

然而，我希望所有被引用的成员也在一个新的行中。如何做到这一点？任何帮助都将不胜感激！

Answer 1

成员在视图规则中被引用。必须在以下成员之后设置换行：

    c.setLinewrap(1).after(viewAccess.forMembersAssignment_4)
    c.setLinewrap(1).after(viewAccess.forMembersAssignment_5)