Change the default settings

By default, template normalization consists in optimizing a template's content by removing superfluous whitespace and inlining content wherever possible, as well as normalize HTML elements' and attributes' names to lowercase and other menial tasks.

Template normalization is performed by $configurator->templateNormalizer, which you can access as an array.

$configurator = new s9e\TextFormatter\Configurator;

foreach ($configurator->templateNormalizer as $i => $normalizer)
{
    echo $i, "\t", get_class($normalizer), "\n";
}

0   s9e\TextFormatter\Configurator\TemplateNormalizations\PreserveSingleSpaces
1   s9e\TextFormatter\Configurator\TemplateNormalizations\RemoveComments
2   s9e\TextFormatter\Configurator\TemplateNormalizations\RemoveInterElementWhitespace
3   s9e\TextFormatter\Configurator\TemplateNormalizations\NormalizeElementNames
4   s9e\TextFormatter\Configurator\TemplateNormalizations\FixUnescapedCurlyBracesInHtmlAttributes
5   s9e\TextFormatter\Configurator\TemplateNormalizations\EnforceHTMLOmittedEndTags
6   s9e\TextFormatter\Configurator\TemplateNormalizations\InlineCDATA
7   s9e\TextFormatter\Configurator\TemplateNormalizations\InlineElements
8   s9e\TextFormatter\Configurator\TemplateNormalizations\InlineTextElements
9   s9e\TextFormatter\Configurator\TemplateNormalizations\UninlineAttributes
10  s9e\TextFormatter\Configurator\TemplateNormalizations\MinifyXPathExpressions
11  s9e\TextFormatter\Configurator\TemplateNormalizations\NormalizeAttributeNames
12  s9e\TextFormatter\Configurator\TemplateNormalizations\OptimizeConditionalAttributes
13  s9e\TextFormatter\Configurator\TemplateNormalizations\FoldArithmeticConstants
14  s9e\TextFormatter\Configurator\TemplateNormalizations\FoldConstantXPathExpressions
15  s9e\TextFormatter\Configurator\TemplateNormalizations\InlineXPathLiterals
16  s9e\TextFormatter\Configurator\TemplateNormalizations\OptimizeChooseText
17  s9e\TextFormatter\Configurator\TemplateNormalizations\OptimizeConditionalValueOf
18  s9e\TextFormatter\Configurator\TemplateNormalizations\OptimizeChoose
19  s9e\TextFormatter\Configurator\TemplateNormalizations\InlineAttributes
20  s9e\TextFormatter\Configurator\TemplateNormalizations\NormalizeUrls
21  s9e\TextFormatter\Configurator\TemplateNormalizations\InlineInferredValues
22  s9e\TextFormatter\Configurator\TemplateNormalizations\RenameLivePreviewEvent
23  s9e\TextFormatter\Configurator\TemplateNormalizations\SetRelNoreferrerOnTargetedLinks
24  s9e\TextFormatter\Configurator\TemplateNormalizations\MinifyInlineCSS

Remove a normalization

$configurator = new s9e\TextFormatter\Configurator;

echo $configurator->templateNormalizer->normalizeTemplate('<![CDATA[ Will be inlined ]]>'), "\n";

$configurator->templateNormalizer->remove('InlineCDATA');

echo $configurator->templateNormalizer->normalizeTemplate('<![CDATA[ Will not be inlined ]]>');

 Will be inlined 
 Will not be inlined 

Add your own custom normalization

You can append() or prepend() a callback to the template normalizer. It will be called with one argument, a DOMNode that represents the <xsl:template/> element that contains the template, which you can modify normally. At the end, the node is serialized back to XML.

The template normalizer iterates through the list of normalizations until none of them modifies the template or the internal iteration limit is reached. If you create a normalization that adds something to a template without testing whether it's already been added by a previous iteration, it will be run multiple times in a row.

$configurator = new s9e\TextFormatter\Configurator;

// Add a callback that adds a "?" to the template only if there isn't one already
$configurator->templateNormalizer->append(
    function (DOMNode $template)
    {
        if (strpos($template->textContent, '?') === false)
        {
            $template->appendChild($template->ownerDocument->createTextNode('?'));
        }
    }
);

// Add a callback that adds a "!" to the template
$configurator->templateNormalizer->append(
    function (DOMNode $template)
    {
        $template->appendChild($template->ownerDocument->createTextNode('!'));
    }
);

echo $configurator->templateNormalizer->normalizeTemplate('Hello world');

Hello world?!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!