/**
* Parses the supports rule.
*
* @param $ruleString
*/
protected function parseRuleString($ruleString)
{
// Remove at-rule name and unnecessary white-spaces
$ruleString = preg_replace('/^[ \\r\\n\\t\\f]*@supports[ \\r\\n\\t\\f]*/i', '', $ruleString);
$ruleString = trim($ruleString, " \r\n\t\f");
$charset = $this->getCharset();
$conditions = [];
foreach (Condition::splitNestedConditions($ruleString, $this->getCharset()) as $normalizedConditionList) {
$normalizedConditions = [];
$currentCondition = "";
if (preg_match('/[^\\x00-\\x7f]/', $normalizedConditionList)) {
$isAscii = false;
$strLen = mb_strlen($normalizedConditionList, $charset);
$getAnd = function ($i) use($normalizedConditionList) {
return strtolower(substr($normalizedConditionList, $i, 5));
};
} else {
$isAscii = true;
$strLen = strlen($normalizedConditionList);
$getAnd = function ($i) use($charset, $normalizedConditionList) {
return mb_strtolower(mb_substr($normalizedConditionList, $i, 5, $charset), $charset);
};
}
for ($i = 0, $j = $strLen; $i < $j; $i++) {
if ($isAscii === true) {
$char = $normalizedConditionList[$i];
} else {
$char = mb_substr($normalizedConditionList, $i, 1, $charset);
}
if ($char === " " && $getAnd($i) === " and ") {
$normalizedConditions[] = new SupportsCondition(trim($currentCondition, " \r\n\t\f"));
$currentCondition = "";
$i += 5 - 1;
} else {
$currentCondition .= $char;
}
}
$currentCondition = trim($currentCondition, " \r\n\t\f");
if ($currentCondition !== "") {
$normalizedConditions[] = new SupportsCondition(trim($currentCondition, " \r\n\t\f"));
}
foreach ($normalizedConditions as $normalizedCondition) {
$conditions[] = $normalizedCondition;
}
}
$this->setConditions($conditions);
}
/**
* Parses the condition part of the media rule.
*
* @param string $conditionList
* @return MediaCondition[]
*/
protected function parseConditionList($conditionList)
{
$charset = $this->getCharset();
$conditions = [];
foreach (Condition::splitNestedConditions($conditionList) as $normalizedConditionList) {
$normalizedConditions = [];
$currentCondition = "";
if (preg_match('/[^\\x00-\\x7f]/', $normalizedConditionList)) {
$isAscii = false;
$strLen = mb_strlen($normalizedConditionList, $charset);
$getAnd = function ($i) use($normalizedConditionList) {
return strtolower(substr($normalizedConditionList, $i, 5));
};
} else {
$isAscii = true;
$strLen = strlen($normalizedConditionList);
$getAnd = function ($i) use($charset, $normalizedConditionList) {
return mb_strtolower(mb_substr($normalizedConditionList, $i, 5, $charset), $charset);
};
}
for ($i = 0, $j = $strLen; $i < $j; $i++) {
if ($isAscii === true) {
//$char = substr($normalizedConditionList, $i, 1);
$char = $normalizedConditionList[$i];
} else {
$char = mb_substr($normalizedConditionList, $i, 1, $charset);
}
if ($char === " " && $getAnd($i) === " and ") {
$normalizedConditions[] = new MediaCondition(trim($currentCondition, " \r\n\t\f"));
$currentCondition = "";
$i += 5 - 1;
} else {
$currentCondition .= $char;
}
}
$currentCondition = trim($currentCondition, " \r\n\t\f");
if ($currentCondition !== "") {
$normalizedConditions[] = new MediaCondition(trim($currentCondition, " \r\n\t\f"));
}
foreach ($normalizedConditions as $normalizedCondition) {
$conditions[] = $normalizedCondition;
}
}
return $conditions;
}
