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update _parseRefs and serializeValue so that it works with alt attribute #20

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update _parseRefs and serializeValue so that it works with alt attribute #20

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c1e4979
update _parseRefs and serializeValue so that it works with alt attribute
i-just May 14, 2026
a310c2f
adjust the _parseRefs specifically for alt
i-just May 14, 2026
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31 changes: 31 additions & 0 deletions src/HtmlField.php
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Original file line number Diff line number Diff line change
Expand Up @@ -242,6 +242,19 @@ function(array $matches) use ($allowedStyles) {
$value = preg_replace('/ +/', ' ', $value);
}

// Find any alt text element refs and swap them with ref tags
$value = preg_replace_callback(
'/(alt=)([\'"])([^\'"]*)(?:#|%%23)asset:(\d+)(?:@(\d+))?:alt\2/',
function($matches) {
[, $attr, $q, $text, $ref, $siteId] = array_pad($matches, 6, null);

$ref = "asset:$ref" . ($siteId ? "@$siteId" : '') . ':alt';

return sprintf('%s%s%s', "$attr$q{", "$ref||$text", "}$q");
},
$value
);

// Find any element URLs and swap them with ref tags
$value = preg_replace_callback(
sprintf('/(href=|src=)([\'"])([^\'"\?#]*)(\?[^\'"\?#]+)?(#[^\'"\?#]+)?(?:#|%%23)([\w\\\\]+)\:(\d+)(?:@(\d+))?(\:(?:transform\:)?%s)?\2/', HandleValidator::$handlePattern),
Expand Down Expand Up @@ -422,6 +435,24 @@ private function _parseRefs(string $value, ?ElementInterface $element = null): s

$elementsService = Craft::$app->getElements();

// Parse alt attribute asset ref tags: {asset:123:alt||fallback text}
$value = preg_replace_callback(
'/(alt=)([\'"])(\{asset:(\d+(?:@\d+)?):alt(?:\|\|[^\}]+)?\})\2/',
function($matches) use ($element) {
[$fullMatch, $attr, $q, $refTag, $ref] = $matches;
$parsed = Craft::$app->getElements()->parseRefs($refTag, $element->siteId ?? null);

// If the ref tag couldn't be resolved, leave it alone
if ($parsed === $refTag) {
return $fullMatch;
}

// Output: alt="[resolved text]#asset:123:alt"
return $attr . $q . $parsed . '#asset:' . $ref . ':alt' . $q;
},
$value
);

return preg_replace_callback(
sprintf('/(href=|src=)([\'"])(\{([\w\\\\]+)(\:\d+(?:@\d+)?\:(?:transform\:)?%s)(?:\|\|[^\}]+)?\})(?:\?([^\'"#]*))?(#[^\'"#]+)?\2/', HandleValidator::$handlePattern),
function($matches) use ($element, $elementsService) {
Expand Down
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