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playframeworkplayframework-2.0code-formattingscala-template

Is it possible to prettify scala templates using play framework 2?

Using Play Framework 2 I've noticed the rendered Scala HTML templates don't like indented @if or @for.

So, for example, something like that:

<ul>
   @for(test <- tests) {
      <li>@test.name</li>
   }
</ul>

Will have extra unneeded spaces. To fix it, I need to do something like that:

<ul>
@for(test <- tests) {
   <li>@test.name</li>
}
</ul>

Which will get messy with additional @defining or other statements.

So, is there a way to prettify/beautify Scala templates rendering in order to get rid of extra white spaces?

UPDATE:

Reading this thread I've noticed extra spaces and line breaks are added as well because of the parameters on top of the templates. So this:

@(myParam: String)


<!DOCTYPE html>
<html>
   <head></head>
   <body></body>
</html>

will add 3 extra line breaks on top of the resulting HTML. Which is definitely annoying.

The thread seems to say there are no option at the moment to correct that.

Solution

  • So for more details I've used @biesor answer and went through these steps:

    Add HtmlCompressor as a plugin

    In Build.scala:

    val appDependencies = Seq(
    "com.googlecode.htmlcompressor" % "htmlcompressor" % "1.5.2"
)

    PrettyController

    public class PrettyController extends Controller {

    public static Results.Status ok(Content content) {
        return Results.ok(prettify(content)).as("text/html; charset=utf-8");        
    }

    public static Results.Status badRequest(Content content) {
        return Results.badRequest(prettify(content)).as("text/html; charset=utf-8");        
    }

    public static Results.Status notFound(Content content) {
        return Results.notFound(prettify(content)).as("text/html; charset=utf-8");      
    }

    public static Results.Status forbidden(Content content) {
        return Results.forbidden(prettify(content)).as("text/html; charset=utf-8");     
    }

    public static Results.Status internalServerError(Content content) {
        return Results.internalServerError(prettify(content)).as("text/html; charset=utf-8");       
    }

    public static Results.Status unauthorized(Content content) {
        return Results.unauthorized(prettify(content)).as("text/html; charset=utf-8");      
    }

    private static String prettify(Content content) {
        HtmlCompressor compressor = new HtmlCompressor();
        String output = content.body().trim();

        if (Play.isDev()) {
            compressor.setPreserveLineBreaks(true);
        }

        output = compressor.compress(output);

        return output;
    }
}

    Then every controllers should extend PrettyController.