public static function fontSizeToPt($e)
{
global $tag_size;
$tag_size = BasicChecks::get_p_css($e, "font-size");
while ($tag_size == null && ($e->tag != "body" && $e->tag != "html")) {
$h = BasicChecks::checkHeadingLevel($e);
if ($h != null && $tag_size == null) {
$tag_size = $h * BasicChecks::fontSizeToPt($e->parent());
//heading tag found
return $tag_size;
} else {
//not an heading
if ($e != null) {
$e = $e->parent();
$tag_size = BasicChecks::get_p_css($e, "font-size");
}
}
}
if ($tag_size == null) {
$tag_size = DEFAULT_FONT_SIZE;
$format = DEFAULT_FONT_FORMAT;
return $tag_size;
} else {
if (substr($tag_size, -1) == "%") {
//percent
$s = substr($tag_size, 0, strlen($tag_size) - 1) / 100;
if ($e->tag == "body" || $e->tag == "html") {
$tag_size = DEFAULT_FONT_SIZE * $s;
return $tag_size;
} else {
$tag_size = $s * BasicChecks::fontSizeToPt($e->parent());
return $tag_size;
}
} else {
//em,px,pt
$format = substr($tag_size, -2);
$s = substr($tag_size, 0, strlen($tag_size) - 2);
switch ($format) {
case "pt":
$tag_size = $s;
return $tag_size;
break;
case "px":
$tag_size = $s / 1.32;
return $tag_size;
break;
case "em":
if ($e->tag == "body" || $e->tag == "html") {
$tag_size = DEFAULT_FONT_SIZE * $s;
return $tag_size;
} else {
$tag_size = $s * BasicChecks::fontSizeToPt($e->parent());
return $tag_size;
}
break;
default:
//formato non supportato
return -1;
}
}
}
}
