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xbase2 - formatting line breaks [message #688035]

Thu, 23 June 2011 18:27

Erik Nijkamp

Messages: 3
Registered: June 2011

Junior Member

Hey folks,

I'm fighting with the xbase2 formatter.

This is what I currently have:

@SuppressWarnings("restriction")
public class FooScriptDslFormatter extends XbaseFormatter
{
    @Override
    protected void configureFormatting(FormattingConfig c)
    {
        // xbase
        FooScriptDslGrammarAccess f = (FooScriptDslGrammarAccess) getGrammarAccess();
        configure(c, f.getXbaseGrammarAccess());
    }
}

Unfortunately this does not trigger line breaks for XFeatureCalls:

a() b() c()

Should be transformed to:

a()
b()
c()

Note that we don't want to introduce semicolons. Hence I was not able to determine the correct element for the setLinewrap() invocation.

Do I have to dig deeper or can we play a simple trick here?

Thanks!
erik

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Re: xbase2 - formatting line breaks [message #692622 is a reply to message #688035]

Mon, 04 July 2011 20:59

Sebastian Zarnekow

Messages: 3108
Registered: July 2009

Senior Member

Hi Erik,

IIRC there is no linewrap configured for XFeatureCalls. There will be a
linewrap inside of XBlockExpressions for each expression. Is your list
of feature calls an XBlockExpression (which is acutally instantiated by
the ParserRule XBlockExpression from the XbaseGrammar)?

Regards,
Sebastian
--
Need professional support for Eclipse Modeling?
Go visit: http://xtext.itemis.com

On 23.06.11 20:27, Erik Nijkamp wrote:
> Hey folks,
>
> I'm fighting with the xbase2 formatter.
>
> This is what I currently have:
>
>
> @SuppressWarnings("restriction")
> public class FooScriptDslFormatter extends XbaseFormatter
> {
> @Override
> protected void configureFormatting(FormattingConfig c)
> {
> // xbase
> FooScriptDslGrammarAccess f = (FooScriptDslGrammarAccess)
> getGrammarAccess();
> configure(c, f.getXbaseGrammarAccess());
> }
> }
>
>
> Unfortunately this does not trigger line breaks for XFeatureCalls:
>
>
> a() b() c()
>
>
> Should be transformed to:
>
>
> a()
> b()
> c()
>
>
> Note that we don't want to introduce semicolons. Hence I was not able to
> determine the correct element for the setLinewrap() invocation.
> Do I have to dig deeper or can we play a simple trick here?
>
> Thanks!
> erik
>
>

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Re: xbase2 - formatting line breaks [message #901316 is a reply to message #688035]

Fri, 10 August 2012 18:24

Nikola Petrov

Messages: 4
Registered: August 2012

Junior Member

I am having the same problem and I am using the XBlockExpression ParserRule for my xbase support. I have described the problem as a subpost here with a minimal grammar.

Were you able to fix it after all and if yes how?

[Updated on: Fri, 10 August 2012 18:25]

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Re: xbase2 - formatting line breaks [message #901584 is a reply to message #688035]

Mon, 13 August 2012 14:18

Nikola Petrov

Messages: 4
Registered: August 2012

Junior Member

It seems this is not properly implemented for the xblockexpression as far as I could see it in the code. Here is the code that provides a nice formatting for me.

/**
	 * Some code taken from the Spray project style formatter</a>
	 */
	private void configureXBase(FormattingConfig c, XbaseGrammarAccess grammar) {

		for (Pair<Keyword, Keyword> kw : grammar.findKeywordPairs("{", "}")) {
			c.setLinewrap().after(kw.getFirst());
			c.setLinewrap().around(kw.getSecond());
			c.setIndentation(kw.getFirst(), kw.getSecond());
		}

		// no space before comma, one space after
		for (Keyword kw : grammar.findKeywords(",")) {
			c.setNoSpace().before(kw);
			c.setSpace(" ").after(kw);
		}

		c.setNoSpace().around(
				grammar.getStaticQualifierAccess().getColonColonKeyword_1());
		xbaseFormmater.configureXMemberFeatureCall(c,
				grammar.getXMemberFeatureCallAccess());
		xbaseFormmater.configureXParenthesizedExpression(c,
				grammar.getXParenthesizedExpressionAccess());

		c.setLinewrap().after(grammar.getXExpressionInsideBlockRule());

		Keyword semicolon = grammar.getXBlockExpressionAccess()
				.getSemicolonKeyword_2_1();
		c.setNoLinewrap().before(semicolon);
		c.setNoSpace().before(semicolon);
		c.setLinewrap().after(semicolon);
	}

where xbaseFormmater is an instance of XbaseFormatter which you can inject easily with guice.

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