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Customizing Syntax Highlighting [message #1006210]

Wed, 30 January 2013 08:24

Eclipse User

Hi,

I've tried out to customize my Syntax Highlighting and have got two questions.

1. I've have implemented the necessary classes for customizing the Syntax Highlighting for one element of my grammar (which works so far). But then, the standrad Syntax Highlighting i.e. key word highlightig doesn't work anymore. Is this normal behaviuour?

2. In my grammar, one element consist of a Boolean flag. Depending on true or false, I want to change the Syntax Highlighting for this element. But I don't know how to access the Boolean attribute out of the ISemanticHighlightingCalculator. I used INodes so far:

public void provideHighlightingFor(XtextResource resource,
			IHighlightedPositionAcceptor acceptor) {

		if (resource == null || resource.getParseResult() == null)
			return;

		INode root = resource.getParseResult().getRootNode();
		BidiTreeIterator<INode> iterator = root.getAsTreeIterable().iterator();
		while (iterator.hasNext()) {
			INode node = iterator.next();
			if (node.getSemanticElement() instanceof ParameterDesc) {
				// What I want to have:
                                // if (pdesc.isUnselected() == true) { do something }
			}
		}
}

Re: Customizing Syntax Highlighting [message #1006319 is a reply to message #1006210]

Wed, 30 January 2013 14:48

Eclipse User

Hi,

(1) it (syntacic highlighting) may not work for the particular place you provide semantic highlighting for (offset,length) but for other places

(2) i do not unserstand your question - simply downcast from EObject to ParameterDesc

Re: Customizing Syntax Highlighting [message #1006347 is a reply to message #1006319]

Wed, 30 January 2013 17:54

Eclipse User

Ok the second question is solved..

But again to the first question. I implemented the belowed code into MySemanticHighlightingCalculator and the color for the one element changes as expected. But the default Syntax Highlighting, like the purple color for keywords didn't work anymore. That's what I don't understand. Is the reason maybe that I iterating through the whole tree?

public void provideHighlightingFor(XtextResource resource,
			IHighlightedPositionAcceptor acceptor) {

		if (resource == null || resource.getParseResult() == null)
			return;

		INode root = resource.getParseResult().getRootNode();
		BidiTreeIterator<INode> iterator = root.getAsTreeIterable().iterator();
		while (iterator.hasNext()) {
			INode node = iterator.next();
			if (node.getSemanticElement() instanceof ParameterDesc) {
				ParameterDesc paramdesc = (ParameterDesc) node
						.getSemanticElement();
				if (paramdesc.isUnselected() == true) {
					setStyles(
							acceptor,
							iterator,
							MySemanticHighlightingConfiguration.PARAMETER_DESCRIPTION);
				}
			}
		}
	}

Re: Customizing Syntax Highlighting [message #1006351 is a reply to message #1006347]

Wed, 30 January 2013 18:25

Eclipse User

Strange your code is looking

INode root = resource.getParseResult().getRootNode();
BidiTreeIterator<INode> iterator = root.getAsTreeIterable().iterator();
while (iterator.hasNext()) {
INode node = iterator.next();
if(...)
acceptor.addPosition(node.getOffset(), node.getLength(), MYHighlightingConfiguration.MY_ID);

}
}

[Updated on: Wed, 30 January 2013 18:25] by Moderator

Re: Customizing Syntax Highlighting [message #1006352 is a reply to message #1006351]

Wed, 30 January 2013 18:27

Eclipse User

P.S: the default highlighting will not be applyed between offset and offset+length cause you define explicitely the style for that region

Re: Customizing Syntax Highlighting [message #1006444 is a reply to message #1006352]

Thu, 31 January 2013 06:22

Eclipse User

Hmm, no the default highlighting doesn't work for the whole document :/
But when I remove this from MyDSLUiModule, the default highlighting work again:

public Class<? extends IHighlightingConfiguration> bindIHighlightingConfiguration() {
		return MySemanticHighlightingConfiguration.class;
	}

Re: Customizing Syntax Highlighting [message #1006793 is a reply to message #1006444]

Fri, 01 February 2013 18:01

Eclipse User

any suggestions on this?

Re: Customizing Syntax Highlighting [message #1007141 is a reply to message #1006793]

Mon, 04 February 2013 10:35

Eclipse User

On 2013-02-02 24:01, Phil H wrote:
> any suggestions on this?
Not really, but I did write a highlighter that does semantic as well as
textual highlighting in cloudsmith / geppetto @ github. It may be worth
taking a look at.

Regards
- henrik

Re: Customizing Syntax Highlighting [message #1007465 is a reply to message #1007141]

Tue, 05 February 2013 20:23

Eclipse User

extending DefaultHighlightingConfiguration and invoking super.configure() was the right way Wink

[Updated on: Tue, 05 February 2013 20:23] by Moderator

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