Eclipse Community Forums: TMF (Xtext) » Formatting: respect newlines

Home » Modeling » TMF (Xtext) » Formatting: respect newlines

Formatting: respect newlines [message #1857028]

Fri, 13 January 2023 09:30

Eclipse User

Suppose I'm writing a formatter for an expression language, and I would like to allow two ways of writing an expression.

In the following example, the `extract` operator should either be preceded by a single space or it should start on a new line.

expr extract prop

expr
    extract prop

However, if it starts on a new line, I would like to add indentation. Is it possible to express this somehow?

Examples of reformatting:

expr
extract
prop

expr
    extract prop

expr        extract
prop

expr extract prop

expr
            extract prop

expr
    extract prop

[Updated on: Fri, 13 January 2023 09:35] by Moderator

Re: Formatting: respect newlines [message #1857031 is a reply to message #1857028]

Fri, 13 January 2023 09:54

Eclipse User

You could read the node model in the formatter, check for nl,
Then if else

Re: Formatting: respect newlines [message #1857033 is a reply to message #1857031]

Fri, 13 January 2023 10:47

Eclipse User

Slide 138 of https://www.slideshare.net/meysholdt/xtexts-new-formatter-api covered this, thanks. :)

Basically I can do something like

if (extractExpression.regionFor.keyword("extract").previousHiddenRegion.isMultiline) {
 ...
} else {
 ...
}

Great stuff!

Previous Topic:	exec-maven-plugin with Xtext
Next Topic:	How to implement Formatter maxLineWidth?

Goto Forum:

-=] Back to Top [=-

Current Time: Fri Apr 25 18:27:34 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter