/**
* Transforms a text block into HTML (for internal use)
*
* @param string $text the raw text of the block
* @param array $spans the spans of the block, as an array of \Prismic\Fragment\Span\SpanInterface objects
* @param \Prismic\LinkResolver $linkResolver the link resolver
*
* @return string the HTML version of the block
*/
public static function insertSpans($text, array $spans, $linkResolver = null, $htmlSerializer = null)
{
if (empty($spans)) {
return htmlentities($text, null, 'UTF-8');
}
$tagsStart = array();
$tagsEnd = array();
foreach ($spans as $span) {
if (!array_key_exists($span->getStart(), $tagsStart)) {
$tagsStart[$span->getStart()] = array();
}
if (!array_key_exists($span->getEnd(), $tagsEnd)) {
$tagsEnd[$span->getEnd()] = array();
}
array_push($tagsStart[$span->getStart()], $span);
array_push($tagsEnd[$span->getEnd()], $span);
}
$c = null;
$html = "";
$stack = array();
for ($pos = 0, $len = strlen($text) + 1; $pos < $len; $pos++) {
// Looping to length + 1 to catch closing tags
if (array_key_exists($pos, $tagsEnd)) {
foreach ($tagsEnd[$pos] as $endTag) {
// Close a tag
$tag = array_pop($stack);
// Continue only if block contains content.
if ($tag && $tag["span"]) {
$innerHtml = trim(StructuredText::serialize($tag["span"], $tag["text"], $linkResolver, $htmlSerializer));
if (count($stack) == 0) {
// The tag was top level
$html .= $innerHtml;
} else {
// Add the content to the parent tag
$last = array_pop($stack);
$last["text"] = $last["text"] . $innerHtml;
array_push($stack, $last);
}
}
}
}
if (array_key_exists($pos, $tagsStart)) {
// Sort bigger tags first to ensure the right tag hierarchy
$sspans = $tagsStart[$pos];
$spanSort = function ($a, $b) {
return $b->getEnd() - $b->getStart() - ($a->getEnd() - $a->getStart());
};
usort($sspans, $spanSort);
foreach ($sspans as $span) {
// Open a tag
array_push($stack, array("span" => $span, "text" => ""));
}
}
if ($pos < strlen($text)) {
$c = mb_substr($text, $pos, 1, 'UTF-8');
if (count($stack) == 0) {
// Top-level text
$html .= htmlentities($c, null, 'UTF-8');
} else {
// Inner text of a span
$last_idx = count($stack) - 1;
$last = $stack[$last_idx];
$stack[$last_idx] = array("span" => $last["span"], "text" => $last["text"] . htmlentities($c, null, 'UTF-8'));
}
}
}
return $html;
}