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<?php
namespace Sabberworm\CSS\RuleSet;
use Sabberworm\CSS\Comment\Commentable;
use Sabberworm\CSS\Parsing\ParserState;
use Sabberworm\CSS\Parsing\UnexpectedTokenException;
use Sabberworm\CSS\Renderable;
use Sabberworm\CSS\Rule\Rule;
/**
* RuleSet is a generic superclass denoting rules. The typical example for rule sets are declaration block.
* However, unknown At-Rules (like @font-face) are also rule sets.
*/
abstract class RuleSet implements Renderable, Commentable {
private $aRules;
protected $iLineNo;
protected $aComments;
public function __construct($iLineNo = 0) {
$this->aRules = array();
$this->iLineNo = $iLineNo;
$this->aComments = array();
}
public static function parseRuleSet(ParserState $oParserState, RuleSet $oRuleSet) {
while ($oParserState->comes(';')) {
$oParserState->consume(';');
}
while (!$oParserState->comes('}')) {
$oRule = null;
if($oParserState->getSettings()->bLenientParsing) {
try {
$oRule = Rule::parse($oParserState);
} catch (UnexpectedTokenException $e) {
try {
$sConsume = $oParserState->consumeUntil(array("\n", ";", '}'), true);
// We need to “unfind” the matches to the end of the ruleSet as this will be matched later
if($oParserState->streql(substr($sConsume, -1), '}')) {
$oParserState->backtrack(1);
} else {
while ($oParserState->comes(';')) {
$oParserState->consume(';');
}
}
} catch (UnexpectedTokenException $e) {
// We’ve reached the end of the document. Just close the RuleSet.
return;
}
}
} else {
$oRule = Rule::parse($oParserState);
}
if($oRule) {
$oRuleSet->addRule($oRule);
}
}
$oParserState->consume('}');
}
/**
* @return int
*/
public function getLineNo() {
return $this->iLineNo;
}
public function addRule(Rule $oRule, Rule $oSibling = null) {
$sRule = $oRule->getRule();
if(!isset($this->aRules[$sRule])) {
$this->aRules[$sRule] = array();
}
$iPosition = count($this->aRules[$sRule]);
if ($oSibling !== null) {
$iSiblingPos = array_search($oSibling, $this->aRules[$sRule], true);
if ($iSiblingPos !== false) {
$iPosition = $iSiblingPos;
}
}
array_splice($this->aRules[$sRule], $iPosition, 0, array($oRule));
}
/**
* Returns all rules matching the given rule name
* @param (null|string|Rule) $mRule pattern to search for. If null, returns all rules. if the pattern ends with a dash, all rules starting with the pattern are returned as well as one matching the pattern with the dash excluded. passing a Rule behaves like calling getRules($mRule->getRule()).
* @example $oRuleSet->getRules('font-') //returns an array of all rules either beginning with font- or matching font.
* @example $oRuleSet->getRules('font') //returns array(0 => $oRule, …) or array().
* @return Rule[] Rules.
*/
public function getRules($mRule = null) {
if ($mRule instanceof Rule) {
$mRule = $mRule->getRule();
}
$aResult = array();
foreach($this->aRules as $sName => $aRules) {
// Either no search rule is given or the search rule matches the found rule exactly or the search rule ends in “-” and the found rule starts with the search rule.
if(!$mRule || $sName === $mRule || (strrpos($mRule, '-') === strlen($mRule) - strlen('-') && (strpos($sName, $mRule) === 0 || $sName === substr($mRule, 0, -1)))) {
$aResult = array_merge($aResult, $aRules);
}
}
return $aResult;
}
/**
* Override all the rules of this set.
* @param Rule[] $aRules The rules to override with.
*/
public function setRules(array $aRules) {
$this->aRules = array();
foreach ($aRules as $rule) {
$this->addRule($rule);
}
}
/**
* Returns all rules matching the given pattern and returns them in an associative array with the rule’s name as keys. This method exists mainly for backwards-compatibility and is really only partially useful.
* @param (string) $mRule pattern to search for. If null, returns all rules. if the pattern ends with a dash, all rules starting with the pattern are returned as well as one matching the pattern with the dash excluded. passing a Rule behaves like calling getRules($mRule->getRule()).
* Note: This method loses some information: Calling this (with an argument of 'background-') on a declaration block like { background-color: green; background-color; rgba(0, 127, 0, 0.7); } will only yield an associative array containing the rgba-valued rule while @link{getRules()} would yield an indexed array containing both.
* @return Rule[] Rules.
*/
public function getRulesAssoc($mRule = null) {
$aResult = array();
foreach($this->getRules($mRule) as $oRule) {
$aResult[$oRule->getRule()] = $oRule;
}
return $aResult;
}
/**
* Remove a rule from this RuleSet. This accepts all the possible values that @link{getRules()} accepts. If given a Rule, it will only remove this particular rule (by identity). If given a name, it will remove all rules by that name. Note: this is different from pre-v.2.0 behaviour of PHP-CSS-Parser, where passing a Rule instance would remove all rules with the same name. To get the old behvaiour, use removeRule($oRule->getRule()).
* @param (null|string|Rule) $mRule pattern to remove. If $mRule is null, all rules are removed. If the pattern ends in a dash, all rules starting with the pattern are removed as well as one matching the pattern with the dash excluded. Passing a Rule behaves matches by identity.
*/
public function removeRule($mRule) {
if($mRule instanceof Rule) {
$sRule = $mRule->getRule();
if(!isset($this->aRules[$sRule])) {
return;
}
foreach($this->aRules[$sRule] as $iKey => $oRule) {
if($oRule === $mRule) {
unset($this->aRules[$sRule][$iKey]);
}
}
} else {
foreach($this->aRules as $sName => $aRules) {
// Either no search rule is given or the search rule matches the found rule exactly or the search rule ends in “-” and the found rule starts with the search rule or equals it (without the trailing dash).
if(!$mRule || $sName === $mRule || (strrpos($mRule, '-') === strlen($mRule) - strlen('-') && (strpos($sName, $mRule) === 0 || $sName === substr($mRule, 0, -1)))) {
unset($this->aRules[$sName]);
}
}
}
}
public function __toString() {
return $this->render(new \Sabberworm\CSS\OutputFormat());
}
public function render(\Sabberworm\CSS\OutputFormat $oOutputFormat) {
$sResult = '';
$bIsFirst = true;
foreach ($this->aRules as $aRules) {
foreach($aRules as $oRule) {
$sRendered = $oOutputFormat->safely(function() use ($oRule, $oOutputFormat) {
return $oRule->render($oOutputFormat->nextLevel());
});
if($sRendered === null) {
continue;
}
if($bIsFirst) {
$bIsFirst = false;
$sResult .= $oOutputFormat->nextLevel()->spaceBeforeRules();
} else {
$sResult .= $oOutputFormat->nextLevel()->spaceBetweenRules();
}
$sResult .= $sRendered;
}
}
if(!$bIsFirst) {
// Had some output
$sResult .= $oOutputFormat->spaceAfterRules();
}
return $oOutputFormat->removeLastSemicolon($sResult);
}
/**
* @param array $aComments Array of comments.
*/
public function addComments(array $aComments) {
$this->aComments = array_merge($this->aComments, $aComments);
}
/**
* @return array
*/
public function getComments() {
return $this->aComments;
}
/**
* @param array $aComments Array containing Comment objects.
*/
public function setComments(array $aComments) {
$this->aComments = $aComments;
}
}
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