function csscrush_rgba(CssCrush_Rule $rule)
{
$props = array_keys($rule->properties);
// Determine which properties apply
$rgba_props = array();
foreach ($props as $prop) {
if ($prop === 'background' or strpos($prop, 'color') !== false) {
$rgba_props[] = $prop;
}
}
if (empty($rgba_props)) {
return;
}
$new_set = array();
foreach ($rule as $declaration) {
$is_viable = in_array($declaration->property, $rgba_props);
if ($declaration->skip or !$is_viable or $is_viable and !preg_match('!^rgba___p\\d+___$!', $declaration->value)) {
$new_set[] = $declaration;
continue;
}
// Create rgb value from rgba
$raw_value = $rule->getDeclarationValue($declaration);
$raw_value = substr($raw_value, 5, strlen($raw_value) - 1);
list($r, $g, $b, $a) = explode(',', $raw_value);
// Add rgb value to the stack, followed by rgba
$new_set[] = $rule->createDeclaration($declaration->property, "rgb({$r},{$g},{$b})");
$new_set[] = $declaration;
}
$rule->declarations = $new_set;
}
function csscrush_minheight(CssCrush_Rule $rule)
{
if ($rule->propertyCount('min-height') < 1) {
return;
}
$new_set = array();
foreach ($rule as $declaration) {
$new_set[] = $declaration;
if ($declaration->skip or $declaration->property !== 'min-height') {
continue;
}
$new_set[] = $rule->createDeclaration('_height', $declaration->value);
}
$rule->declarations = $new_set;
}
function csscrush_clip(CssCrush_Rule $rule)
{
// Assume it's been dealt with if the property occurs more than once
if ($rule->propertyCount('clip') !== 1) {
return;
}
$new_set = array();
foreach ($rule as $declaration) {
$new_set[] = $declaration;
if ($declaration->skip or $declaration->property !== 'clip') {
continue;
}
$new_set[] = $rule->createDeclaration('*clip', str_replace(',', ' ', $rule->getDeclarationValue($declaration)));
}
$rule->declarations = $new_set;
}
function csscrush_display_inlineblock(CssCrush_Rule $rule)
{
if ($rule->propertyCount('display') < 1) {
return;
}
$new_set = array();
foreach ($rule as $declaration) {
$new_set[] = $declaration;
$is_display = $declaration->property === 'display';
if ($declaration->skip or !$is_display or $is_display and $declaration->value !== 'inline-block') {
continue;
}
$new_set[] = $rule->createDeclaration('*display', 'inline');
$new_set[] = $rule->createDeclaration('*zoom', 1);
}
$rule->declarations = $new_set;
}
function csscrush_filter(CssCrush_Rule $rule)
{
if ($rule->propertyCount('-ms-filter') < 1) {
return;
}
$filter_prefix = 'progid:DXImageTransform.Microsoft.';
$new_set = array();
foreach ($rule as $declaration) {
if ($declaration->skip or $declaration->property !== '-ms-filter') {
$new_set[] = $declaration;
continue;
}
$list = array_map('trim', explode(',', $declaration->value));
foreach ($list as &$item) {
if (strpos($item, $filter_prefix) !== 0 and strpos($item, 'alpha') !== 0) {
$item = $filter_prefix . ucfirst($item);
}
}
$declaration->value = implode(',', $list);
if (!$rule->propertyCount('zoom')) {
// Filters need hasLayout
$new_set[] = $rule->createDeclaration('zoom', 1);
}
// Quoted version for -ms-filter IE >= 8
$new_set[] = $rule->createDeclaration('-ms-filter', "\"{$declaration->value}\"");
// Star escaped property for IE < 8
$new_set[] = $rule->createDeclaration('*filter', $declaration->value);
}
$rule->declarations = $new_set;
}
function csscrush_opacity(CssCrush_Rule $rule)
{
if ($rule->propertyCount('opacity') < 1) {
return;
}
$new_set = array();
foreach ($rule as $declaration) {
$new_set[] = $declaration;
if ($declaration->skip or $declaration->property != 'opacity') {
continue;
}
$opacity = (double) $declaration->value;
$opacity = round($opacity * 100);
if (!$rule->propertyCount('zoom')) {
// Filters need hasLayout
$new_set[] = $rule->createDeclaration('zoom', 1);
}
$value = "alpha(opacity={$opacity})";
$new_set[] = $rule->createDeclaration('-ms-filter', "\"{$value}\"");
$new_set[] = $rule->createDeclaration('*filter', $value);
}
$rule->declarations = $new_set;
}
protected static function cb_extractRules($match)
{
$rule = new CssCrush_Rule($match[1], $match[2]);
// Only store rules with declarations
if (!empty($rule->declarations)) {
if (!empty(self::$aliases)) {
$rule->addPropertyAliases();
$rule->addFunctionAliases();
$rule->addValueAliases();
}
$rule->applyMacros();
$rule->expandSelectors();
$label = self::createTokenLabel('r');
self::$storage->tokens->rules[$label] = $rule;
return $label . "\n";
} else {
return '';
}
}
