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<?php
namespace Sabberworm\CSS\CSSList;
use Sabberworm\CSS\Comment\Commentable;
use Sabberworm\CSS\Parsing\ParserState;
use Sabberworm\CSS\Parsing\SourceException;
use Sabberworm\CSS\Parsing\UnexpectedTokenException;
use Sabberworm\CSS\Property\AtRule;
use Sabberworm\CSS\Property\Charset;
use Sabberworm\CSS\Property\CSSNamespace;
use Sabberworm\CSS\Property\Import;
use Sabberworm\CSS\Property\Selector;
use Sabberworm\CSS\Renderable;
use Sabberworm\CSS\RuleSet\AtRuleSet;
use Sabberworm\CSS\RuleSet\DeclarationBlock;
use Sabberworm\CSS\RuleSet\RuleSet;
use Sabberworm\CSS\Value\CSSString;
use Sabberworm\CSS\Value\URL;
use Sabberworm\CSS\Value\Value;
/**
* A CSSList is the most generic container available. Its contents include RuleSet as well as other CSSList objects.
* Also, it may contain Import and Charset objects stemming from @-rules.
*/
abstract class CSSList implements Renderable, Commentable {
protected $aComments;
protected $aContents;
protected $iLineNo;
public function __construct($iLineNo = 0) {
$this->aComments = array();
$this->aContents = array();
$this->iLineNo = $iLineNo;
}
public static function parseList(ParserState $oParserState, CSSList $oList) {
$bIsRoot = $oList instanceof Document;
if(is_string($oParserState)) {
$oParserState = new ParserState($oParserState);
}
$bLenientParsing = $oParserState->getSettings()->bLenientParsing;
while(!$oParserState->isEnd()) {
$comments = $oParserState->consumeWhiteSpace();
$oListItem = null;
if($bLenientParsing) {
try {
$oListItem = self::parseListItem($oParserState, $oList);
} catch (UnexpectedTokenException $e) {
$oListItem = false;
}
} else {
$oListItem = self::parseListItem($oParserState, $oList);
}
if($oListItem === null) {
// List parsing finished
return;
}
if($oListItem) {
$oListItem->setComments($comments);
$oList->append($oListItem);
}
$oParserState->consumeWhiteSpace();
}
if(!$bIsRoot && !$bLenientParsing) {
throw new SourceException("Unexpected end of document", $oParserState->currentLine());
}
}
private static function parseListItem(ParserState $oParserState, CSSList $oList) {
$bIsRoot = $oList instanceof Document;
if ($oParserState->comes('@')) {
$oAtRule = self::parseAtRule($oParserState);
if($oAtRule instanceof Charset) {
if(!$bIsRoot) {
throw new UnexpectedTokenException('@charset may only occur in root document', '', 'custom', $oParserState->currentLine());
}
if(count($oList->getContents()) > 0) {
throw new UnexpectedTokenException('@charset must be the first parseable token in a document', '', 'custom', $oParserState->currentLine());
}
$oParserState->setCharset($oAtRule->getCharset()->getString());
}
return $oAtRule;
} else if ($oParserState->comes('}')) {
$oParserState->consume('}');
if ($bIsRoot) {
if ($oParserState->getSettings()->bLenientParsing) {
while ($oParserState->comes('}')) $oParserState->consume('}');
return DeclarationBlock::parse($oParserState);
} else {
throw new SourceException("Unopened {", $oParserState->currentLine());
}
} else {
return null;
}
} else {
return DeclarationBlock::parse($oParserState);
}
}
private static function parseAtRule(ParserState $oParserState) {
$oParserState->consume('@');
$sIdentifier = $oParserState->parseIdentifier();
$iIdentifierLineNum = $oParserState->currentLine();
$oParserState->consumeWhiteSpace();
if ($sIdentifier === 'import') {
$oLocation = URL::parse($oParserState);
$oParserState->consumeWhiteSpace();
$sMediaQuery = null;
if (!$oParserState->comes(';')) {
$sMediaQuery = $oParserState->consumeUntil(';');
}
$oParserState->consume(';');
return new Import($oLocation, $sMediaQuery, $iIdentifierLineNum);
} else if ($sIdentifier === 'charset') {
$sCharset = CSSString::parse($oParserState);
$oParserState->consumeWhiteSpace();
$oParserState->consume(';');
return new Charset($sCharset, $iIdentifierLineNum);
} else if (self::identifierIs($sIdentifier, 'keyframes')) {
$oResult = new KeyFrame($iIdentifierLineNum);
$oResult->setVendorKeyFrame($sIdentifier);
$oResult->setAnimationName(trim($oParserState->consumeUntil('{', false, true)));
CSSList::parseList($oParserState, $oResult);
return $oResult;
} else if ($sIdentifier === 'namespace') {
$sPrefix = null;
$mUrl = Value::parsePrimitiveValue($oParserState);
if (!$oParserState->comes(';')) {
$sPrefix = $mUrl;
$mUrl = Value::parsePrimitiveValue($oParserState);
}
$oParserState->consume(';');
if ($sPrefix !== null && !is_string($sPrefix)) {
throw new UnexpectedTokenException('Wrong namespace prefix', $sPrefix, 'custom', $iIdentifierLineNum);
}
if (!($mUrl instanceof CSSString || $mUrl instanceof URL)) {
throw new UnexpectedTokenException('Wrong namespace url of invalid type', $mUrl, 'custom', $iIdentifierLineNum);
}
return new CSSNamespace($mUrl, $sPrefix, $iIdentifierLineNum);
} else {
//Unknown other at rule (font-face or such)
$sArgs = trim($oParserState->consumeUntil('{', false, true));
if (substr_count($sArgs, "(") != substr_count($sArgs, ")")) {
if($oParserState->getSettings()->bLenientParsing) {
return NULL;
} else {
throw new SourceException("Unmatched brace count in media query", $oParserState->currentLine());
}
}
$bUseRuleSet = true;
foreach(explode('/', AtRule::BLOCK_RULES) as $sBlockRuleName) {
if(self::identifierIs($sIdentifier, $sBlockRuleName)) {
$bUseRuleSet = false;
break;
}
}
if($bUseRuleSet) {
$oAtRule = new AtRuleSet($sIdentifier, $sArgs, $iIdentifierLineNum);
RuleSet::parseRuleSet($oParserState, $oAtRule);
} else {
$oAtRule = new AtRuleBlockList($sIdentifier, $sArgs, $iIdentifierLineNum);
CSSList::parseList($oParserState, $oAtRule);
}
return $oAtRule;
}
}
/**
* Tests an identifier for a given value. Since identifiers are all keywords, they can be vendor-prefixed. We need to check for these versions too.
*/
private static function identifierIs($sIdentifier, $sMatch) {
return (strcasecmp($sIdentifier, $sMatch) === 0)
?: preg_match("/^(-\\w+-)?$sMatch$/i", $sIdentifier) === 1;
}
/**
* @return int
*/
public function getLineNo() {
return $this->iLineNo;
}
/**
* Prepend item to list of contents.
*
* @param object $oItem Item.
*/
public function prepend($oItem) {
array_unshift($this->aContents, $oItem);
}
/**
* Append item to list of contents.
*
* @param object $oItem Item.
*/
public function append($oItem) {
$this->aContents[] = $oItem;
}
/**
* Splice the list of contents.
*
* @param int $iOffset Offset.
* @param int $iLength Length. Optional.
* @param RuleSet[] $mReplacement Replacement. Optional.
*/
public function splice($iOffset, $iLength = null, $mReplacement = null) {
array_splice($this->aContents, $iOffset, $iLength, $mReplacement);
}
/**
* Removes an item from the CSS list.
* @param RuleSet|Import|Charset|CSSList $oItemToRemove May be a RuleSet (most likely a DeclarationBlock), a Import, a Charset or another CSSList (most likely a MediaQuery)
* @return bool Whether the item was removed.
*/
public function remove($oItemToRemove) {
$iKey = array_search($oItemToRemove, $this->aContents, true);
if ($iKey !== false) {
unset($this->aContents[$iKey]);
return true;
}
return false;
}
/**
* Replaces an item from the CSS list.
* @param RuleSet|Import|Charset|CSSList $oItemToRemove May be a RuleSet (most likely a DeclarationBlock), a Import, a Charset or another CSSList (most likely a MediaQuery)
*/
public function replace($oOldItem, $oNewItem) {
$iKey = array_search($oOldItem, $this->aContents, true);
if ($iKey !== false) {
array_splice($this->aContents, $iKey, 1, $oNewItem);
return true;
}
return false;
}
/**
* Set the contents.
* @param array $aContents Objects to set as content.
*/
public function setContents(array $aContents) {
$this->aContents = array();
foreach ($aContents as $content) {
$this->append($content);
}
}
/**
* Removes a declaration block from the CSS list if it matches all given selectors.
* @param array|string $mSelector The selectors to match.
* @param boolean $bRemoveAll Whether to stop at the first declaration block found or remove all blocks
*/
public function removeDeclarationBlockBySelector($mSelector, $bRemoveAll = false) {
if ($mSelector instanceof DeclarationBlock) {
$mSelector = $mSelector->getSelectors();
}
if (!is_array($mSelector)) {
$mSelector = explode(',', $mSelector);
}
foreach ($mSelector as $iKey => &$mSel) {
if (!($mSel instanceof Selector)) {
$mSel = new Selector($mSel);
}
}
foreach ($this->aContents as $iKey => $mItem) {
if (!($mItem instanceof DeclarationBlock)) {
continue;
}
if ($mItem->getSelectors() == $mSelector) {
unset($this->aContents[$iKey]);
if (!$bRemoveAll) {
return;
}
}
}
}
public function __toString() {
return $this->render(new \Sabberworm\CSS\OutputFormat());
}
public function render(\Sabberworm\CSS\OutputFormat $oOutputFormat) {
$sResult = '';
$bIsFirst = true;
$oNextLevel = $oOutputFormat;
if(!$this->isRootList()) {
$oNextLevel = $oOutputFormat->nextLevel();
}
foreach ($this->aContents as $oContent) {
$sRendered = $oOutputFormat->safely(function() use ($oNextLevel, $oContent) {
return $oContent->render($oNextLevel);
});
if($sRendered === null) {
continue;
}
if($bIsFirst) {
$bIsFirst = false;
$sResult .= $oNextLevel->spaceBeforeBlocks();
} else {
$sResult .= $oNextLevel->spaceBetweenBlocks();
}
$sResult .= $sRendered;
}
if(!$bIsFirst) {
// Had some output
$sResult .= $oOutputFormat->spaceAfterBlocks();
}
return $sResult;
}
/**
* Return true if the list can not be further outdented. Only important when rendering.
*/
public abstract function isRootList();
public function getContents() {
return $this->aContents;
}
/**
* @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;
}
}