public static function checkLinkContrastWcag2AAA($cssPropriety, $bodyAttribute)
{
global $background, $foreground;
global $global_e, $global_content_dom;
global $stringa_testo_prova;
$e = $global_e;
$content_dom = $global_content_dom;
BasicChecks::setCssSelectors($content_dom);
if (!BasicChecks::isElementVisible($e)) {
return true;
}
$background = '';
$foreground = '';
if (trim(BasicChecks::remove_children($e)) == "" || trim(BasicChecks::remove_children($e)) == " ") {
//l'elemento non contiene testo "visibile": non eseguo il controllo del contrasto
// the element has no text "visible": Do not run the contrast control
return true;
}
$foreground = BasicChecks::getForegroundA($e, $cssPropriety);
if ($foreground == "undetermined") {
return true;
}
if (($foreground == "" || $foreground == null) && $bodyAttribute != null) {
$app = $e->parent();
while ($app->tag != "body" && $app->tag != "html" && $app->tag != null) {
$app = $app->parent();
}
if ($app != null && isset($app->attr[$bodyAttribute])) {
$foreground = $app->attr[$bodyAttribute];
}
}
if ($foreground == "undetermined") {
return true;
}
if ($foreground == "" || $foreground == null) {
return true;
}
$background = BasicChecks::getBackgroundA($e, $cssPropriety);
if ($background == "undetermined") {
return true;
}
if ($background == "" || $background == null) {
$background = BasicChecks::getBackground($e);
}
if ($background == "" || $background == null || $background == "-1") {
return true;
}
if ($background == "undetermined") {
return true;
}
$background = BasicChecks::convert_color_to_hex($background);
$foreground = BasicChecks::convert_color_to_hex($foreground);
$ris = '';
$ris = BasicChecks::ContrastRatio(strtolower($background), strtolower($foreground));
//echo "tag->"; echo $e->tag; echo " bg->"; echo $background; echo " fr->"; echo $foreground; echo " ris="; echo $ris; echo "<br>";
$size = BasicChecks::fontSizeToPt($e);
$bold = BasicChecks::get_p_css($e, "font-weight");
if ($size < 0) {
//formato non supportato
return true;
} elseif ($size >= 18 || $bold == "bold" && $size >= 14) {
$threashold = 4.5;
} else {
$threashold = 7;
}
$stringa_testo_prova = '';
$stringa_testo_prova = "<p>ris: " . $ris . " threashold: " . $threashold . "</p>";
if ($ris < $threashold) {
return false;
} else {
return true;
}
return true;
}