public function expandListStyleShorthand()
{
$aListProperties = array('list-style-type' => 'disc', 'list-style-position' => 'outside', 'list-style-image' => 'none');
$aListStyleTypes = array('none', 'disc', 'circle', 'square', 'decimal-leading-zero', 'decimal', 'lower-roman', 'upper-roman', 'lower-greek', 'lower-alpha', 'lower-latin', 'upper-alpha', 'upper-latin', 'hebrew', 'armenian', 'georgian', 'cjk-ideographic', 'hiragana', 'hira-gana-iroha', 'katakana-iroha', 'katakana');
$aListStylePositions = array('inside', 'outside');
$aRules = $this->getRules();
if (!isset($aRules['list-style'])) {
return;
}
$oRule = $aRules['list-style'];
$mRuleValue = $oRule->getValue();
$aValues = array();
if (!$mRuleValue instanceof CSSRuleValueList) {
$aValues[] = $mRuleValue;
} else {
$aValues = $mRuleValue->getListComponents();
}
if (count($aValues) == 1 && $aValues[0] == 'inherit') {
foreach ($aListProperties as $sProperty => $mValue) {
$oNewRule = new CSSRule($sProperty);
$oNewRule->addValue('inherit');
$oNewRule->setIsImportant($oRule->getIsImportant());
$this->addRule($oNewRule);
}
$this->removeRule('list-style');
return;
}
foreach ($aValues as $mValue) {
if (!$mValue instanceof CSSValue) {
$mValue = mb_strtolower($mValue);
}
if ($mValue instanceof CSSUrl) {
$aListProperties['list-style-image'] = $mValue;
} else {
if (in_array($mValue, $aListStyleTypes)) {
$aListProperties['list-style-types'] = $mValue;
} else {
if (in_array($mValue, $aListStylePositions)) {
$aListProperties['list-style-position'] = $mValue;
}
}
}
}
foreach ($aListProperties as $sProperty => $mValue) {
$oNewRule = new CSSRule($sProperty);
$oNewRule->setIsImportant($oRule->getIsImportant());
$oNewRule->addValue($mValue);
$this->addRule($oNewRule);
}
$this->removeRule('list-style');
}
private function parseRule()
{
$oRule = new CSSRule($this->parseIdentifier());
$this->consumeWhiteSpace();
$this->consume(':');
$oValue = $this->parseValue(self::listDelimiterForRule($oRule->getRule()));
$oRule->setValue($oValue);
if ($this->comes('!')) {
$this->consume('!');
$this->consumeWhiteSpace();
$sImportantMarker = $this->consume(strlen('important'));
if (mb_convert_case($sImportantMarker, MB_CASE_LOWER) !== 'important') {
throw new Exception("! was followed by “" . $sImportantMarker . "”. Expected “important”");
}
$oRule->setIsImportant(true);
}
if ($this->comes(';')) {
$this->consume(';');
}
return $oRule;
}
/**
* Merge multiple CSS RuleSets by cascading according to the CSS 2.1 cascading rules
* (http://www.w3.org/TR/REC-CSS2/cascade.html#cascading-order).
*
* @param array $aDeclarations An array of CSSDeclarationBlock objects.
*
* @return CSSDeclarationBlock.
*
* ==== Cascading
* If a CSSDeclarationBlock object has its +specificity+ defined, that specificity is
* used in the cascade calculations.
*
* If no specificity is explicitly set and the CSSDeclarationBlock has *one* selector,
* the specificity is calculated using that selector.
*
* If no selectors or multiple selectors are present, the specificity is
* treated as 0.
*
* ==== Example #1
* <code>
* $oDecl_1 = new CSSDeclarationBlock();
* $oRule_1 = new CSSRule('color');
* $oRule_1->addValue(new CSSColor('#F00'));
* $oDecl_1->addRule($oRule_1);
* $oDecl_2 = new CSSDeclarationBlock();
* $oRule_2 = new CSSRule('margin');
* $oRule_2->addValue(
* new CSSSize(0, 'px')
* );
* $oDecl_2->addRule($oRule_2);
*
* $oMerged = CSSDocument::mergeDeclarations($oDecl_1, $oDecl_2);
*
* echo $oMerged;
* //=> "{ margin: 0px; color: rgb(255,0,0); }"
* </code>
* ==== Example #2
* <code>
* $oDecl_1 = new CSSDeclarationBlock();
* $oRule_1 = new CSSRule('background-color');
* $oRule_1->addValue(new CSSColor('black'));
* $oDecl_1->addRule($oRule_1);
* $oDecl_2 = new CSSDeclarationBlock();
* $oRule_2 = new CSSRule('background-image');
* $oRule_2->addValue('none');
* $oDecl_2->addRule($oRule_2);
*
* $oMerged = CSSDocument::mergeDeclarations($oDecl_1, $oDecl_2);
*
* echo $oMerged;
* //=> "{ background: none rgb(0,0,0); }"
* </code>
**/
static function mergeDeclarations(array $aDeclarations)
{
// Internal storage of CSS properties that we will keep
$aProperties = array();
foreach ($aDeclarations as $oDeclaration) {
$oDeclaration->expandShorthands();
$aSelectors = $oDeclaration->getSelectors();
$iSpecificity = 0;
if (count($aSelectors) == 1) {
$iSpecificity = $aSelectors[0]->getSpecificity();
}
foreach ($oDeclaration->getRules() as $sProperty => $oRule) {
// Add the property to the list to be folded per
// http://www.w3.org/TR/CSS21/cascade.html#cascading-order
if (!isset($aProperties[$sProperty])) {
$aProperties[$sProperty] = array('values' => $oRule->getValues(), 'specificity' => $iSpecificity, 'important' => $oRule->getIsImportant());
} else {
$aProperty = $aProperties[$sProperty];
if ($aProperty['specificity'] <= $iSpecificity && !$aProperty['important']) {
$aProperties[$sProperty] = array('values' => $oRule->getValues(), 'specificity' => $iSpecificity, 'important' => $oRule->getIsImportant());
}
}
if ($oRule->getIsImportant()) {
$aProperties[$sProperty] = array('values' => $oRule->getValues(), 'specificity' => $iSpecificity, 'important' => $oRule->getIsImportant());
}
}
// end foreach rules
}
// end foreach rulesets
$oMerged = new CSSDeclarationBlock();
foreach ($aProperties as $sProperty => $aDetails) {
$oNewRule = new CSSRule($sProperty);
foreach ($aDetails['values'] as $aValue) {
$oNewRule->addvalue($aValue);
}
if ($aDetails['important']) {
$oNewRule->setIsImportant(true);
}
$oMerged->addRule($oNewRule);
}
$oMerged->createShorthands();
return $oMerged;
}