Same name in other branches

1. 8.9.x core/lib/Drupal/Core/Template/TwigNodeTrans.php \Drupal\Core\Template\TwigNodeTrans::compileString()
2. 10 core/lib/Drupal/Core/Template/TwigNodeTrans.php \Drupal\Core\Template\TwigNodeTrans::compileString()
3. 11.x core/lib/Drupal/Core/Template/TwigNodeTrans.php \Drupal\Core\Template\TwigNodeTrans::compileString()

Extracts the text and tokens for the "trans" tag.

Parameters

\Twig\Node\Node $body: The node to compile.

Return value

array Returns an array containing the two following parameters:

• string $text The extracted text.
• array $tokens The extracted tokens as new \Twig\Node\Expression\TempNameExpression instances.

1 call to TwigNodeTrans::compileString()

TwigNodeTrans::compile in core/lib/Drupal/Core/Template/TwigNodeTrans.php

File

core/lib/Drupal/Core/Template/TwigNodeTrans.php, line 113

Class

TwigNodeTrans

A class that defines the Twig 'trans' tag for Drupal.

Namespace

Drupal\Core\Template

Code

protected function compileString(Node $body) {
    if ($body instanceof NameExpression || $body instanceof ConstantExpression || $body instanceof TempNameExpression) {
        return [
            $body,
            [],
        ];
    }
    $tokens = [];
    if (count($body)) {
        $text = '';
        foreach ($body as $node) {
            if ($node instanceof PrintNode) {
                $n = $node->getNode('expr');
                while ($n instanceof FilterExpression) {
                    $n = $n->getNode('node');
                }
                if ($n instanceof CheckToStringNode) {
                    $n = $n->getNode('expr');
                }
                $args = $n;
                // Support TwigExtension->renderVar() function in chain.
                if ($args instanceof FunctionExpression) {
                    $args = $n->getNode('arguments')
                        ->getNode(0);
                }
                // Detect if a token implements one of the filters reserved for
                // modifying the prefix of a token. The default prefix used for
                // translations is "@". This escapes the printed token and makes them
                // safe for templates.
                // @see TwigExtension::getFilters()
                $argPrefix = '@';
                while ($args instanceof FilterExpression) {
                    switch ($args->getNode('filter')
                        ->getAttribute('value')) {
                        case 'placeholder':
                            $argPrefix = '%';
                            break;
                    }
                    $args = $args->getNode('node');
                }
                if ($args instanceof CheckToStringNode) {
                    $args = $args->getNode('expr');
                }
                if ($args instanceof GetAttrExpression) {
                    $argName = [];
                    // Reuse the incoming expression.
                    $expr = $args;
                    // Assemble a valid argument name by walking through the expression.
                    $argName[] = $args->getNode('attribute')
                        ->getAttribute('value');
                    while ($args->hasNode('node')) {
                        $args = $args->getNode('node');
                        if ($args instanceof NameExpression) {
                            $argName[] = $args->getAttribute('name');
                        }
                        else {
                            $argName[] = $args->getNode('attribute')
                                ->getAttribute('value');
                        }
                    }
                    $argName = array_reverse($argName);
                    $argName = implode('.', $argName);
                }
                else {
                    $argName = $n->getAttribute('name');
                    if (!is_null($args)) {
                        $argName = $args->getAttribute('name');
                    }
                    $expr = new NameExpression($argName, $n->getTemplateLine());
                }
                $placeholder = sprintf('%s%s', $argPrefix, $argName);
                $text .= $placeholder;
                $expr->setAttribute('placeholder', $placeholder);
                $tokens[] = $expr;
            }
            else {
                $text .= $node->getAttribute('data');
            }
        }
    }
    elseif (!$body->hasAttribute('data')) {
        throw new SyntaxError('{% trans %} tag cannot be empty');
    }
    else {
        $text = $body->getAttribute('data');
    }
    return [
        new Node([
            new ConstantExpression(trim($text), $body->getTemplateLine()),
        ]),
        $tokens,
    ];
}

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