public function __construct($selector_string = null, $declarations_string)
{
$regex = CssCrush::$regex;
// Parse the selectors chunk
if (!empty($selector_string)) {
$selector_adjustments = array('!:hocus([^a-z0-9_-])!' => ':any(:hover,:focus)$1', '!:pocus([^a-z0-9_-])!' => ':any(:hover,:focus,:active)$1', '!::(after|before|first-letter|first-line)!' => ':$1');
$selector_string = preg_replace(array_keys($selector_adjustments), array_values($selector_adjustments), $selector_string);
$selectors_match = CssCrush::splitDelimList($selector_string, ',');
$this->parens += $selectors_match->matches;
// Remove and store comments that sit above the first selector
// remove all comments between the other selectors
preg_match_all($regex->token->comment, $selectors_match->list[0], $m);
$this->comments = $m[0];
foreach ($selectors_match->list as &$selector) {
$selector = preg_replace($regex->token->comment, '', $selector);
$selector = trim($selector);
}
$this->selectors = $selectors_match->list;
}
// Parse the declarations chunk
$declarations_match = CssCrush::splitDelimList($declarations_string, ';');
$this->parens += $declarations_match->matches;
// Parse declarations in to property/value pairs
foreach ($declarations_match->list as $declaration) {
// Strip comments around the property
$declaration = preg_replace($regex->token->comment, '', $declaration);
// Store the property
$colonPos = strpos($declaration, ':');
if ($colonPos === false) {
// If there is no colon it's malformed
continue;
} else {
$prop = trim(substr($declaration, 0, $colonPos));
// Store the property name
$this->addProperty($prop);
}
// Extract the value part of the declaration
$value = substr($declaration, $colonPos + 1);
$value = $value !== false ? trim($value) : $value;
if ($value === false or $value === '') {
// We'll ignore declarations with empty values
continue;
}
// If are parenthesised expressions in the value
// Search for any custom functions so we can apply them
if (count($declarations_match->matches)) {
CssCrush::$storage->tmpParens = $declarations_match->matches;
$value = preg_replace_callback($regex->function->custom, array('CssCrush_Function', 'css_fn'), $value);
}
// Store the property family
// Store the vendor id, if one is present
if (preg_match($regex->vendorPrefix, $prop, $vendor)) {
$family = $vendor[2];
$vendor = $vendor[1];
} else {
$vendor = null;
$family = $prop;
}
// Create an index of all functions in the current declaration
if (preg_match_all($regex->function->match, $value, $functions) > 0) {
$out = array();
foreach ($functions[2] as $index => $fn_name) {
$out[] = $fn_name;
}
$functions = array_unique($out);
} else {
$functions = array();
}
// Store the declaration
$_declaration = (object) array('property' => $prop, 'family' => $family, 'vendor' => $vendor, 'functions' => $functions, 'value' => $value);
$this->declarations[] = $_declaration;
}
}
protected static function parseArgs($input, $argCount = null)
{
$args = CssCrush::splitDelimList($input, ',', true, true);
return array_map('trim', $args->list);
}
