Question

I’m trying to write a regexp which will help to find non-translated texts in html code.

Translated texts means that they are going through special tag: or through construction: ${…}

Ex. non-translated:

<h1>Hello</h1>

Translated texts are:

<h1><fmt:message key="hello" /></h1>
<button>${expression}</button>

I’ve written the following expression:

\<(\w+[^>])(?:.*)\>([^\s]+?)\</\1\>

It finds correct strings like:

<p>text<p>

Correctly skips

<a><fmt:message key="common.delete" /></a>

But also catches:

<li><p><fmt:message key="common.delete" /></p></li>

And I can’t figure out how to add exception for ${…} strings in this expression
Can anybody help me?

Answer 1

If I understand you properly, you want to ensure the data inside the “tag” doesn’t contain fmt:messsage or ${....}

You might be able to use a negative-lookahead in conjuction with a . to assert that the characters captured by the . are not one of those cases:

/<(\w+)[^>]*>(?:(?!<fmt:message|\$\{|<\/\1>).)*<\/\1>/i

If you want to avoid capturing any “tags” inside the tag, you can ignore the <fmt:message portion, and just use [^<] instead of a . – to match only non <

/<(\w+)[^>]*>(?:(?!\$\{)[^<])*<\/\1>/i

Added from comment If you also want to exclude “empty” tags, add another negative-lookahead – this time (?!\s*<) – ensure that the stuff inside the tag is not empty or only containing whitespace:

/<(\w+)[^>]*>(?!\s*<)(?:(?!\$\{)[^<])*<\/\1>/i