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Syntax Highlighting in Xtext [message #1092609]

Thu, 22 August 2013 22:07

Eclipse User

Hello,

I have a grammar like:

"start" Sample{
"details1" det1=STRING
"details2" det2=INT
"details3" det3=STRING
}

And my language will look something like:

start Sample{
details1 "Some details"
details2 20
details3 "Some data"
}

I want to COLOR only keywords such as "details1","details2","details3" in syntax highlighting.
What might be the best solution for it if i have some 30 keywords in my grammar??
Thanks in advance !! Smile

Re: Syntax Highlighting in Xtext [message #1092706 is a reply to message #1092609]

Fri, 23 August 2013 01:38

Eclipse User

Hi keywords are already colored. Aren't they?

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Re: Syntax Highlighting in Xtext [message #1092749 is a reply to message #1092706]

Fri, 23 August 2013 02:45

Eclipse User

Ps: the hook for token based highlighting is AbstractAntlrTokenToAttributeIdMapper/DefaultAntlrTokenToAttributeIdMapper
(the one for semantic is ISemanticHighlightingCalculator)

Re: Syntax Highlighting in Xtext [message #1092752 is a reply to message #1092706]

Fri, 23 August 2013 02:46

Eclipse User

Hi,

the hook to customize token based highlighting is DefaultAntlrTokenToAttributeIdMapper

Re: Syntax Highlighting in Xtext [message #1092758 is a reply to message #1092752]

Fri, 23 August 2013 02:56

Eclipse User

Hi,
Yes they are already colored.. But in this case i want to color only the keywords which comes inside "{" and "}" braces.. So default color for "start" and different color for details1, details2, details3.. What is the best way to do it. Thanks in advance

Re: Syntax Highlighting in Xtext [message #1092759 is a reply to message #1092706]

Fri, 23 August 2013 02:58

Eclipse User

Re: Syntax Highlighting in Xtext [message #1092760 is a reply to message #1092706]

Fri, 23 August 2013 02:59

Eclipse User

Re: Syntax Highlighting in Xtext [message #1092776 is a reply to message #1092706]

Fri, 23 August 2013 03:22

Eclipse User

but the question is how to take away highlighting of "start", if I interprete the situation correctly

Re: Syntax Highlighting in Xtext [message #1092777 is a reply to message #1092706]

Fri, 23 August 2013 03:23

Eclipse User

But the questiuon seems how to supress this for the keyword "start"

Re: Syntax Highlighting in Xtext [message #1092800 is a reply to message #1092706]

Fri, 23 August 2013 04:01

Eclipse User

Hi,
The keywords are already colored, But I want to give a different color to the keywrods which comes inside "{" and "}" braces.

Like:
start Sample{
details1 "Some details"
details2 20
details3 "Some data"
}

"start " will have default color and some custom color for "details1", "details2" and "details3".

What is the best way to do it? Thanks in advance !! :) Smile

Re: Syntax Highlighting in Xtext [message #1092801 is a reply to message #1092706]

Fri, 23 August 2013 04:01

Eclipse User

Re: Syntax Highlighting in Xtext [message #1092802 is a reply to message #1092706]

Fri, 23 August 2013 04:02

Eclipse User

Re: Syntax Highlighting in Xtext [message #1092808 is a reply to message #1092609]

Fri, 23 August 2013 04:08

Eclipse User

Hi,
I want to color the nodes which comes inside "{" and "}" with different color.
What is the best way to do it?

Ex.
start Sample{
details1 "Some details"
details2 20
details3 "Some data"
}

"start " with default color and "details1", "details2", "details3" with different color. Thanks in advance :) Smile

Re: Syntax Highlighting in Xtext [message #1092919 is a reply to message #1092706]

Fri, 23 August 2013 06:25

Eclipse User

think it's more the question how to stop "start" beeing highlighted

Re: Syntax Highlighting in Xtext [message #1093060 is a reply to message #1092919]

Fri, 23 August 2013 10:04

Eclipse User

Seems like the forum was broken. See additional answers above

Re: Syntax Highlighting in Xtext [message #1093069 is a reply to message #1092777]

Fri, 23 August 2013 10:15

Eclipse User

HI Uli and Christian,
Thanks for your reply. Can you suggest me some ideas related to it ??
Thanks in advance Smile

Re: Syntax Highlighting in Xtext [message #1093072 is a reply to message #1093069]

Fri, 23 August 2013 10:19

Eclipse User

Did you try to override the mapper?

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Need training, onsite consulting or any other kind of help for Xtext?
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Re: Syntax Highlighting in Xtext [message #1093139 is a reply to message #1093072]

Fri, 23 August 2013 12:28

Eclipse User

Hi christian,
Yes. But did not get much idea how to proceed with it.. Sad

Re: Syntax Highlighting in Xtext [message #1093151 is a reply to message #1093139]

Fri, 23 August 2013 12:51

Eclipse User

Hi simply debug the place where keyword is returned.
Then you will see what in input params are to detect if you should be
returning something else in your subclass. Then simply override the
corresponding binding and have fun

--
Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext at itemis dot de

Re: Syntax Highlighting in Xtext [message #1093159 is a reply to message #1093151]

Fri, 23 August 2013 13:10

Eclipse User

Hi Christian,
Thanks a lot for your reply.. I will try with your suggestion.. Smile

Re: Syntax Highlighting in Xtext [message #1093547 is a reply to message #1093159]

Sat, 24 August 2013 04:13

Eclipse User

Hi Christian,
I have overridden the:
protected String calculateId(final String tokenName, final int tokenType) {} method from DefaultAntlrTokenToAttributeIdMapper class and now I am able to get all my tokens.
I removed invalid tokens for me like "RULE_STRING", "RULE_INT", all punctuation etc. But still how do I avoid "start" in:
start Sample{
details1 "Some details"
details2 20
details3 "Some data"
}

Do I have any other way than hardcoding this value ?? Because I will have a problem if a string literal is changed in the grammar.
Thanks in advance !! :) Smile

Regards,
Arshad

[Updated on: Sat, 24 August 2013 04:14] by Moderator

Re: Syntax Highlighting in Xtext [message #1093574 is a reply to message #1093547]

Sat, 24 August 2013 05:18

Eclipse User

Hi of you do lexacal Highlighting the only Chance is Todo it on hardcoding.
For everything Else you have to Digg into Semantic highlighting

Re: Syntax Highlighting in Xtext [message #1094244 is a reply to message #1092609]

Sun, 25 August 2013 06:53

Eclipse User

Hi,
Can we use both "DefaultAntlrTokenToAttributeIdMapper" and " ISemanticHighlightingCalculator" for syntax highlighting one xtext language?? I tried it, first calculateid() method is getting called from "DefaultAntlrTokenToAttributeIdMapper" and then method present in "ISemanticHighlightingCalculator"... Would it be a good idea? The first one is a class and 2 one is an interface... Can I assume that order of these methods which are getting called would be the same??
Thanks in advance :):) Smile

Re: Syntax Highlighting in Xtext [message #1094251 is a reply to message #1094244]

Sun, 25 August 2013 07:09

Eclipse User

No,

ISemanticHighlightingCalculator overrules DefaultAntlrTokenToAttributeIdMapper,
they are completely separate.

Re: Syntax Highlighting in Xtext [message #1095831 is a reply to message #1094251]

Tue, 27 August 2013 11:37

Eclipse User

Hi,
I am doing it by implementing ISemanticHighlightingCalculator. I am taking all the leaf nodes present.
My language looks something like:

Sample name.details.something {
content goes here
...............
..............
...............
}

ILeafNode treats "." as a different node.
So I get "name", ".", "details", ".", "something" as different nodes where as "name.details.something" is a single node for me.
How can I avoid this ?
Thanks for your help in advance :):) Smile

Re: Syntax Highlighting in Xtext [message #1095834 is a reply to message #1095831]

Tue, 27 August 2013 11:41

Eclipse User

Hi,

depending on your grammar there will be a corresponding ICompositeNode

Re: Syntax Highlighting in Xtext [message #1098010 is a reply to message #1095834]

Fri, 30 August 2013 09:19

Eclipse User

Hi Christian,
Your suggestions helped me and I did it by implementing ISemantichighlightingCalculator. Thanks a lot !! Smile

Re: Syntax Highlighting in Xtext [message #1730286 is a reply to message #1098010]

Sat, 23 April 2016 09:42

Eclipse User

Hi christian,

If I use ISemantichighlightingCalculator, then I need to write code for every rule to highlight them or I can write calculator for selected rule?

Re: Syntax Highlighting in Xtext [message #1730287 is a reply to message #1730286]

Sat, 23 April 2016 10:38

Eclipse User

yes you can

class MyDslUiModule extends AbstractMyDslUiModule {

def Class<? extends ISemanticHighlightingCalculator> bindISemanticHighlightingCalculator() {
MyDslSemanticHighlightingCalculator
}
}

public class MyDslSemanticHighlightingCalculator extends DefaultSemanticHighlightingCalculator{

@Inject
MyDslGrammarAccess ga;

@Override
public void provideHighlightingFor(XtextResource resource, IHighlightedPositionAcceptor acceptor,
CancelIndicator cancelIndicator) {
ICompositeNode rootNode = resource.getParseResult().getRootNode();

for (INode node : rootNode.getAsTreeIterable()) {
if (node.getGrammarElement() == ga.getGreetingAccess().getNameIDTerminalRuleCall_1_0()) {
acceptor.addPosition(node.getOffset(), node.getLength(), DefaultHighlightingConfiguration.KEYWORD_ID);
}
}
super.provideHighlightingFor(resource, acceptor, cancelIndicator);
}

}

Re: Syntax Highlighting in Xtext [message #1730355 is a reply to message #1730287]

Mon, 25 April 2016 05:08

Eclipse User

Thank you Christian. It's working like gem

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