Файл: system/libs/scssphp/Parser.php
Строк: 2544
<?php
/**
* SCSSPHP
*
* @copyright 2012-2020 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://scssphp.github.io/scssphp
*/
namespace ScssPhpScssPhp;
use ScssPhpScssPhpExceptionParserException;
/**
* Parser
*
* @author Leaf Corcoran <leafot@gmail.com>
*/
class Parser
{
const SOURCE_INDEX = -1;
const SOURCE_LINE = -2;
const SOURCE_COLUMN = -3;
/**
* @var array<string, int>
*/
protected static $precedence = [
'=' => 0,
'or' => 1,
'and' => 2,
'==' => 3,
'!=' => 3,
'<=' => 4,
'>=' => 4,
'<' => 4,
'>' => 4,
'+' => 5,
'-' => 5,
'*' => 6,
'/' => 6,
'%' => 6,
];
/**
* @var string
*/
protected static $commentPattern;
/**
* @var string
*/
protected static $operatorPattern;
/**
* @var string
*/
protected static $whitePattern;
/**
* @var Cache|null
*/
protected $cache;
private $sourceName;
private $sourceIndex;
/**
* @var array<int, int>
*/
private $sourcePositions;
/**
* @var array|null
*/
private $charset;
/**
* The current offset in the buffer
*
* @var int
*/
private $count;
/**
* @var Block
*/
private $env;
/**
* @var bool
*/
private $inParens;
/**
* @var bool
*/
private $eatWhiteDefault;
/**
* @var bool
*/
private $discardComments;
private $allowVars;
/**
* @var string
*/
private $buffer;
private $utf8;
/**
* @var string|null
*/
private $encoding;
private $patternModifiers;
private $commentsSeen;
private $cssOnly;
/**
* Constructor
*
* @api
*
* @param string $sourceName
* @param integer $sourceIndex
* @param string|null $encoding
* @param Cache|null $cache
* @param bool $cssOnly
*/
public function __construct($sourceName, $sourceIndex = 0, $encoding = 'utf-8', Cache $cache = null, $cssOnly = false)
{
$this->sourceName = $sourceName ?: '(stdin)';
$this->sourceIndex = $sourceIndex;
$this->charset = null;
$this->utf8 = ! $encoding || strtolower($encoding) === 'utf-8';
$this->patternModifiers = $this->utf8 ? 'Aisu' : 'Ais';
$this->commentsSeen = [];
$this->commentsSeen = [];
$this->allowVars = true;
$this->cssOnly = $cssOnly;
if (empty(static::$operatorPattern)) {
static::$operatorPattern = '([*/%+-]|[!=]=|>=?|<=?|and|or)';
$commentSingle = '//';
$commentMultiLeft = '/*';
$commentMultiRight = '*/';
static::$commentPattern = $commentMultiLeft . '.*?' . $commentMultiRight;
static::$whitePattern = $this->utf8
? '/' . $commentSingle . '[^n]*s*|(' . static::$commentPattern . ')s*|s+/AisuS'
: '/' . $commentSingle . '[^n]*s*|(' . static::$commentPattern . ')s*|s+/AisS';
}
$this->cache = $cache;
}
/**
* Get source file name
*
* @api
*
* @return string
*/
public function getSourceName()
{
return $this->sourceName;
}
/**
* Throw parser error
*
* @api
*
* @param string $msg
*
* @throws ParserException
*
* @deprecated use "parseError" and throw the exception in the caller instead.
*/
public function throwParseError($msg = 'parse error')
{
@trigger_error(
'The method "throwParseError" is deprecated. Use "parseError" and throw the exception in the caller instead',
E_USER_DEPRECATED
);
throw $this->parseError($msg);
}
/**
* Creates a parser error
*
* @api
*
* @param string $msg
*
* @return ParserException
*/
public function parseError($msg = 'parse error')
{
list($line, $column) = $this->getSourcePosition($this->count);
$loc = empty($this->sourceName)
? "line: $line, column: $column"
: "$this->sourceName on line $line, at column $column";
if ($this->peek('(.*?)(n|$)', $m, $this->count)) {
$this->restoreEncoding();
$e = new ParserException("$msg: failed at `$m[1]` $loc");
$e->setSourcePosition([$this->sourceName, $line, $column]);
return $e;
}
$this->restoreEncoding();
$e = new ParserException("$msg: $loc");
$e->setSourcePosition([$this->sourceName, $line, $column]);
return $e;
}
/**
* Parser buffer
*
* @api
*
* @param string $buffer
*
* @return Block
*/
public function parse($buffer)
{
if ($this->cache) {
$cacheKey = $this->sourceName . ':' . md5($buffer);
$parseOptions = [
'charset' => $this->charset,
'utf8' => $this->utf8,
];
$v = $this->cache->getCache('parse', $cacheKey, $parseOptions);
if (! is_null($v)) {
return $v;
}
}
// strip BOM (byte order marker)
if (substr($buffer, 0, 3) === "xefxbbxbf") {
$buffer = substr($buffer, 3);
}
$this->buffer = rtrim($buffer, "x00..x1f");
$this->count = 0;
$this->env = null;
$this->inParens = false;
$this->eatWhiteDefault = true;
$this->saveEncoding();
$this->extractLineNumbers($buffer);
$this->pushBlock(null); // root block
$this->whitespace();
$this->pushBlock(null);
$this->popBlock();
while ($this->parseChunk()) {
;
}
if ($this->count !== strlen($this->buffer)) {
throw $this->parseError();
}
if (! empty($this->env->parent)) {
throw $this->parseError('unclosed block');
}
if ($this->charset) {
array_unshift($this->env->children, $this->charset);
}
$this->restoreEncoding();
if ($this->cache) {
$this->cache->setCache('parse', $cacheKey, $this->env, $parseOptions);
}
return $this->env;
}
/**
* Parse a value or value list
*
* @api
*
* @param string $buffer
* @param string|array $out
*
* @return boolean
*/
public function parseValue($buffer, &$out)
{
$this->count = 0;
$this->env = null;
$this->inParens = false;
$this->eatWhiteDefault = true;
$this->buffer = (string) $buffer;
$this->saveEncoding();
$this->extractLineNumbers($this->buffer);
$list = $this->valueList($out);
$this->restoreEncoding();
return $list;
}
/**
* Parse a selector or selector list
*
* @api
*
* @param string $buffer
* @param string|array $out
* @param bool $shouldValidate
*
* @return boolean
*/
public function parseSelector($buffer, &$out, $shouldValidate = true)
{
$this->count = 0;
$this->env = null;
$this->inParens = false;
$this->eatWhiteDefault = true;
$this->buffer = (string) $buffer;
$this->saveEncoding();
$this->extractLineNumbers($this->buffer);
// discard space/comments at the start
$this->discardComments = true;
$this->whitespace();
$this->discardComments = false;
$selector = $this->selectors($out);
$this->restoreEncoding();
if ($shouldValidate && $this->count !== strlen($buffer)) {
throw $this->parseError("`" . substr($buffer, $this->count) . "` is not a valid Selector in `$buffer`");
}
return $selector;
}
/**
* Parse a media Query
*
* @api
*
* @param string $buffer
* @param string|array $out
*
* @return boolean
*/
public function parseMediaQueryList($buffer, &$out)
{
$this->count = 0;
$this->env = null;
$this->inParens = false;
$this->eatWhiteDefault = true;
$this->buffer = (string) $buffer;
$this->saveEncoding();
$this->extractLineNumbers($this->buffer);
$isMediaQuery = $this->mediaQueryList($out);
$this->restoreEncoding();
return $isMediaQuery;
}
/**
* Parse a single chunk off the head of the buffer and append it to the
* current parse environment.
*
* Returns false when the buffer is empty, or when there is an error.
*
* This function is called repeatedly until the entire document is
* parsed.
*
* This parser is most similar to a recursive descent parser. Single
* functions represent discrete grammatical rules for the language, and
* they are able to capture the text that represents those rules.
*
* Consider the function Compiler::keyword(). (All parse functions are
* structured the same.)
*
* The function takes a single reference argument. When calling the
* function it will attempt to match a keyword on the head of the buffer.
* If it is successful, it will place the keyword in the referenced
* argument, advance the position in the buffer, and return true. If it
* fails then it won't advance the buffer and it will return false.
*
* All of these parse functions are powered by Compiler::match(), which behaves
* the same way, but takes a literal regular expression. Sometimes it is
* more convenient to use match instead of creating a new function.
*
* Because of the format of the functions, to parse an entire string of
* grammatical rules, you can chain them together using &&.
*
* But, if some of the rules in the chain succeed before one fails, then
* the buffer position will be left at an invalid state. In order to
* avoid this, Compiler::seek() is used to remember and set buffer positions.
*
* Before parsing a chain, use $s = $this->count to remember the current
* position into $s. Then if a chain fails, use $this->seek($s) to
* go back where we started.
*
* @return boolean
*/
protected function parseChunk()
{
$s = $this->count;
// the directives
if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] === '@') {
if (
$this->literal('@at-root', 8) &&
($this->selectors($selector) || true) &&
($this->map($with) || true) &&
(($this->matchChar('(') &&
$this->interpolation($with) &&
$this->matchChar(')')) || true) &&
$this->matchChar('{', false)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$atRoot = $this->pushSpecialBlock(Type::T_AT_ROOT, $s);
$atRoot->selector = $selector;
$atRoot->with = $with;
return true;
}
$this->seek($s);
if (
$this->literal('@media', 6) &&
$this->mediaQueryList($mediaQueryList) &&
$this->matchChar('{', false)
) {
$media = $this->pushSpecialBlock(Type::T_MEDIA, $s);
$media->queryList = $mediaQueryList[2];
return true;
}
$this->seek($s);
if (
$this->literal('@mixin', 6) &&
$this->keyword($mixinName) &&
($this->argumentDef($args) || true) &&
$this->matchChar('{', false)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$mixin = $this->pushSpecialBlock(Type::T_MIXIN, $s);
$mixin->name = $mixinName;
$mixin->args = $args;
return true;
}
$this->seek($s);
if (
($this->literal('@include', 8) &&
$this->keyword($mixinName) &&
($this->matchChar('(') &&
($this->argValues($argValues) || true) &&
$this->matchChar(')') || true) &&
($this->end()) ||
($this->literal('using', 5) &&
$this->argumentDef($argUsing) &&
($this->end() || $this->matchChar('{') && $hasBlock = true)) ||
$this->matchChar('{') && $hasBlock = true)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$child = [
Type::T_INCLUDE,
$mixinName,
isset($argValues) ? $argValues : null,
null,
isset($argUsing) ? $argUsing : null
];
if (! empty($hasBlock)) {
$include = $this->pushSpecialBlock(Type::T_INCLUDE, $s);
$include->child = $child;
} else {
$this->append($child, $s);
}
return true;
}
$this->seek($s);
if (
$this->literal('@scssphp-import-once', 20) &&
$this->valueList($importPath) &&
$this->end()
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$this->append([Type::T_SCSSPHP_IMPORT_ONCE, $importPath], $s);
return true;
}
$this->seek($s);
if (
$this->literal('@import', 7) &&
$this->valueList($importPath) &&
$importPath[0] !== Type::T_FUNCTION_CALL &&
$this->end()
) {
if ($this->cssOnly) {
$this->assertPlainCssValid([Type::T_IMPORT, $importPath], $s);
$this->append([Type::T_COMMENT, rtrim(substr($this->buffer, $s, $this->count - $s))]);
return true;
}
$this->append([Type::T_IMPORT, $importPath], $s);
return true;
}
$this->seek($s);
if (
$this->literal('@import', 7) &&
$this->url($importPath) &&
$this->end()
) {
if ($this->cssOnly) {
$this->assertPlainCssValid([Type::T_IMPORT, $importPath], $s);
$this->append([Type::T_COMMENT, rtrim(substr($this->buffer, $s, $this->count - $s))]);
return true;
}
$this->append([Type::T_IMPORT, $importPath], $s);
return true;
}
$this->seek($s);
if (
$this->literal('@extend', 7) &&
$this->selectors($selectors) &&
$this->end()
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
// check for '!flag'
$optional = $this->stripOptionalFlag($selectors);
$this->append([Type::T_EXTEND, $selectors, $optional], $s);
return true;
}
$this->seek($s);
if (
$this->literal('@function', 9) &&
$this->keyword($fnName) &&
$this->argumentDef($args) &&
$this->matchChar('{', false)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$func = $this->pushSpecialBlock(Type::T_FUNCTION, $s);
$func->name = $fnName;
$func->args = $args;
return true;
}
$this->seek($s);
if (
$this->literal('@return', 7) &&
($this->valueList($retVal) || true) &&
$this->end()
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$this->append([Type::T_RETURN, isset($retVal) ? $retVal : [Type::T_NULL]], $s);
return true;
}
$this->seek($s);
if (
$this->literal('@each', 5) &&
$this->genericList($varNames, 'variable', ',', false) &&
$this->literal('in', 2) &&
$this->valueList($list) &&
$this->matchChar('{', false)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$each = $this->pushSpecialBlock(Type::T_EACH, $s);
foreach ($varNames[2] as $varName) {
$each->vars[] = $varName[1];
}
$each->list = $list;
return true;
}
$this->seek($s);
if (
$this->literal('@while', 6) &&
$this->expression($cond) &&
$this->matchChar('{', false)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
while (
$cond[0] === Type::T_LIST &&
! empty($cond['enclosing']) &&
$cond['enclosing'] === 'parent' &&
count($cond[2]) == 1
) {
$cond = reset($cond[2]);
}
$while = $this->pushSpecialBlock(Type::T_WHILE, $s);
$while->cond = $cond;
return true;
}
$this->seek($s);
if (
$this->literal('@for', 4) &&
$this->variable($varName) &&
$this->literal('from', 4) &&
$this->expression($start) &&
($this->literal('through', 7) ||
($forUntil = true && $this->literal('to', 2))) &&
$this->expression($end) &&
$this->matchChar('{', false)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$for = $this->pushSpecialBlock(Type::T_FOR, $s);
$for->var = $varName[1];
$for->start = $start;
$for->end = $end;
$for->until = isset($forUntil);
return true;
}
$this->seek($s);
if (
$this->literal('@if', 3) &&
$this->functionCallArgumentsList($cond, false, '{', false)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$if = $this->pushSpecialBlock(Type::T_IF, $s);
while (
$cond[0] === Type::T_LIST &&
! empty($cond['enclosing']) &&
$cond['enclosing'] === 'parent' &&
count($cond[2]) == 1
) {
$cond = reset($cond[2]);
}
$if->cond = $cond;
$if->cases = [];
return true;
}
$this->seek($s);
if (
$this->literal('@debug', 6) &&
$this->functionCallArgumentsList($value, false)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$this->append([Type::T_DEBUG, $value], $s);
return true;
}
$this->seek($s);
if (
$this->literal('@warn', 5) &&
$this->functionCallArgumentsList($value, false)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$this->append([Type::T_WARN, $value], $s);
return true;
}
$this->seek($s);
if (
$this->literal('@error', 6) &&
$this->functionCallArgumentsList($value, false)
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$this->append([Type::T_ERROR, $value], $s);
return true;
}
$this->seek($s);
if (
$this->literal('@content', 8) &&
($this->end() ||
$this->matchChar('(') &&
$this->argValues($argContent) &&
$this->matchChar(')') &&
$this->end())
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
$this->append([Type::T_MIXIN_CONTENT, isset($argContent) ? $argContent : null], $s);
return true;
}
$this->seek($s);
$last = $this->last();
if (isset($last) && $last[0] === Type::T_IF) {
list(, $if) = $last;
if ($this->literal('@else', 5)) {
if ($this->matchChar('{', false)) {
$else = $this->pushSpecialBlock(Type::T_ELSE, $s);
} elseif (
$this->literal('if', 2) &&
$this->functionCallArgumentsList($cond, false, '{', false)
) {
$else = $this->pushSpecialBlock(Type::T_ELSEIF, $s);
$else->cond = $cond;
}
if (isset($else)) {
$else->dontAppend = true;
$if->cases[] = $else;
return true;
}
}
$this->seek($s);
}
// only retain the first @charset directive encountered
if (
$this->literal('@charset', 8) &&
$this->valueList($charset) &&
$this->end()
) {
if (! isset($this->charset)) {
$statement = [Type::T_CHARSET, $charset];
list($line, $column) = $this->getSourcePosition($s);
$statement[static::SOURCE_LINE] = $line;
$statement[static::SOURCE_COLUMN] = $column;
$statement[static::SOURCE_INDEX] = $this->sourceIndex;
$this->charset = $statement;
}
return true;
}
$this->seek($s);
if (
$this->literal('@supports', 9) &&
($t1 = $this->supportsQuery($supportQuery)) &&
($t2 = $this->matchChar('{', false))
) {
$directive = $this->pushSpecialBlock(Type::T_DIRECTIVE, $s);
$directive->name = 'supports';
$directive->value = $supportQuery;
return true;
}
$this->seek($s);
// doesn't match built in directive, do generic one
if (
$this->matchChar('@', false) &&
$this->mixedKeyword($dirName) &&
$this->directiveValue($dirValue, '{')
) {
if (count($dirName) === 1 && is_string(reset($dirName))) {
$dirName = reset($dirName);
} else {
$dirName = [Type::T_STRING, '', $dirName];
}
if ($dirName === 'media') {
$directive = $this->pushSpecialBlock(Type::T_MEDIA, $s);
} else {
$directive = $this->pushSpecialBlock(Type::T_DIRECTIVE, $s);
$directive->name = $dirName;
}
if (isset($dirValue)) {
! $this->cssOnly || ($dirValue = $this->assertPlainCssValid($dirValue));
$directive->value = $dirValue;
}
return true;
}
$this->seek($s);
// maybe it's a generic blockless directive
if (
$this->matchChar('@', false) &&
$this->mixedKeyword($dirName) &&
! $this->isKnownGenericDirective($dirName) &&
($this->end(false) || ($this->directiveValue($dirValue, '') && $this->end(false)))
) {
if (count($dirName) === 1 && is_string(reset($dirName))) {
$dirName = reset($dirName);
} else {
$dirName = [Type::T_STRING, '', $dirName];
}
if (
! empty($this->env->parent) &&
$this->env->type &&
! in_array($this->env->type, [Type::T_DIRECTIVE, Type::T_MEDIA])
) {
$plain = trim(substr($this->buffer, $s, $this->count - $s));
throw $this->parseError(
"Unknown directive `{$plain}` not allowed in `" . $this->env->type . "` block"
);
}
// blockless directives with a blank line after keeps their blank lines after
// sass-spec compliance purpose
$s = $this->count;
$hasBlankLine = false;
if ($this->match('s*?ns*n', $out, false)) {
$hasBlankLine = true;
$this->seek($s);
}
$isNotRoot = ! empty($this->env->parent);
$this->append([Type::T_DIRECTIVE, [$dirName, $dirValue, $hasBlankLine, $isNotRoot]], $s);
$this->whitespace();
return true;
}
$this->seek($s);
return false;
}
$inCssSelector = null;
if ($this->cssOnly) {
$inCssSelector = (! empty($this->env->parent) &&
! in_array($this->env->type, [Type::T_DIRECTIVE, Type::T_MEDIA]));
}
// custom properties : right part is static
if (($this->customProperty($name) ) && $this->matchChar(':', false)) {
$start = $this->count;
// but can be complex and finish with ; or }
foreach ([';','}'] as $ending) {
if (
$this->openString($ending, $stringValue, '(', ')', false) &&
$this->end()
) {
$end = $this->count;
$value = $stringValue;
// check if we have only a partial value due to nested [] or { } to take in account
$nestingPairs = [['[', ']'], ['{', '}']];
foreach ($nestingPairs as $nestingPair) {
$p = strpos($this->buffer, $nestingPair[0], $start);
if ($p && $p < $end) {
$this->seek($start);
if (
$this->openString($ending, $stringValue, $nestingPair[0], $nestingPair[1], false) &&
$this->end() &&
$this->count > $end
) {
$end = $this->count;
$value = $stringValue;
}
}
}
$this->seek($end);
$this->append([Type::T_CUSTOM_PROPERTY, $name, $value], $s);
return true;
}
}
// TODO: output an error here if nothing found according to sass spec
}
$this->seek($s);
// property shortcut
// captures most properties before having to parse a selector
if (
$this->keyword($name, false) &&
$this->literal(': ', 2) &&
$this->valueList($value) &&
$this->end()
) {
$name = [Type::T_STRING, '', [$name]];
$this->append([Type::T_ASSIGN, $name, $value], $s);
return true;
}
$this->seek($s);
// variable assigns
if (
$this->variable($name) &&
$this->matchChar(':') &&
$this->valueList($value) &&
$this->end()
) {
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
// check for '!flag'
$assignmentFlags = $this->stripAssignmentFlags($value);
$this->append([Type::T_ASSIGN, $name, $value, $assignmentFlags], $s);
return true;
}
$this->seek($s);
// misc
if ($this->literal('-->', 3)) {
return true;
}
// opening css block
if (
$this->selectors($selectors) &&
$this->matchChar('{', false)
) {
! $this->cssOnly || ! $inCssSelector || $this->assertPlainCssValid(false);
$this->pushBlock($selectors, $s);
if ($this->eatWhiteDefault) {
$this->whitespace();
$this->append(null); // collect comments at the beginning if needed
}
return true;
}
$this->seek($s);
// property assign, or nested assign
if (
$this->propertyName($name) &&
$this->matchChar(':')
) {
$foundSomething = false;
if ($this->valueList($value)) {
if (empty($this->env->parent)) {
throw $this->parseError('expected "{"');
}
$this->append([Type::T_ASSIGN, $name, $value], $s);
$foundSomething = true;
}
if ($this->matchChar('{', false)) {
! $this->cssOnly || $this->assertPlainCssValid(false);
$propBlock = $this->pushSpecialBlock(Type::T_NESTED_PROPERTY, $s);
$propBlock->prefix = $name;
$propBlock->hasValue = $foundSomething;
$foundSomething = true;
} elseif ($foundSomething) {
$foundSomething = $this->end();
}
if ($foundSomething) {
return true;
}
}
$this->seek($s);
// closing a block
if ($this->matchChar('}', false)) {
$block = $this->popBlock();
if (! isset($block->type) || $block->type !== Type::T_IF) {
if ($this->env->parent) {
$this->append(null); // collect comments before next statement if needed
}
}
if (isset($block->type) && $block->type === Type::T_INCLUDE) {
$include = $block->child;
unset($block->child);
$include[3] = $block;
$this->append($include, $s);
} elseif (empty($block->dontAppend)) {
$type = isset($block->type) ? $block->type : Type::T_BLOCK;
$this->append([$type, $block], $s);
}
// collect comments just after the block closing if needed
if ($this->eatWhiteDefault) {
$this->whitespace();
if ($this->env->comments) {
$this->append(null);
}
}
return true;
}
// extra stuff
if (
$this->matchChar(';') ||
$this->literal('<!--', 4)
) {
return true;
}
return false;
}
/**
* Push block onto parse tree
*
* @param array|null $selectors
* @param integer $pos
*
* @return Block
*/
protected function pushBlock($selectors, $pos = 0)
{
list($line, $column) = $this->getSourcePosition($pos);
$b = new Block();
$b->sourceName = $this->sourceName;
$b->sourceLine = $line;
$b->sourceColumn = $column;
$b->sourceIndex = $this->sourceIndex;
$b->selectors = $selectors;
$b->comments = [];
$b->parent = $this->env;
if (! $this->env) {
$b->children = [];
} elseif (empty($this->env->children)) {
$this->env->children = $this->env->comments;
$b->children = [];
$this->env->comments = [];
} else {
$b->children = $this->env->comments;
$this->env->comments = [];
}
$this->env = $b;
// collect comments at the beginning of a block if needed
if ($this->eatWhiteDefault) {
$this->whitespace();
if ($this->env->comments) {
$this->append(null);
}
}
return $b;
}
/**
* Push special (named) block onto parse tree
*
* @param string $type
* @param integer $pos
*
* @return Block
*/
protected function pushSpecialBlock($type, $pos)
{
$block = $this->pushBlock(null, $pos);
$block->type = $type;
return $block;
}
/**
* Pop scope and return last block
*
* @return Block
*
* @throws Exception
*/
protected function popBlock()
{
// collect comments ending just before of a block closing
if ($this->env->comments) {
$this->append(null);
}
// pop the block
$block = $this->env;
if (empty($block->parent)) {
throw $this->parseError('unexpected }');
}
if ($block->type == Type::T_AT_ROOT) {
// keeps the parent in case of self selector &
$block->selfParent = $block->parent;
}
$this->env = $block->parent;
unset($block->parent);
return $block;
}
/**
* Peek input stream
*
* @param string $regex
* @param array $out
* @param integer $from
*
* @return integer
*/
protected function peek($regex, &$out, $from = null)
{
if (! isset($from)) {
$from = $this->count;
}
$r = '/' . $regex . '/' . $this->patternModifiers;
$result = preg_match($r, $this->buffer, $out, null, $from);
return $result;
}
/**
* Seek to position in input stream (or return current position in input stream)
*
* @param integer $where
*/
protected function seek($where)
{
$this->count = $where;
}
/**
* Assert a parsed part is plain CSS Valid
*
* @param array|false $parsed
* @param int $startPos
* @throws ParserException
*/
protected function assertPlainCssValid($parsed, $startPos = null)
{
$type = '';
if ($parsed) {
$type = $parsed[0];
$parsed = $this->isPlainCssValidElement($parsed);
}
if (! $parsed) {
if (! is_null($startPos)) {
$plain = rtrim(substr($this->buffer, $startPos, $this->count - $startPos));
$message = "Error : `{$plain}` isn't allowed in plain CSS";
} else {
$message = 'Error: SCSS syntax not allowed in CSS file';
}
if ($type) {
$message .= " ($type)";
}
throw $this->parseError($message);
}
return $parsed;
}
/**
* Check a parsed element is plain CSS Valid
* @param array $parsed
* @return bool|array
*/
protected function isPlainCssValidElement($parsed, $allowExpression = false)
{
// keep string as is
if (is_string($parsed)) {
return $parsed;
}
if (
in_array($parsed[0], [Type::T_FUNCTION, Type::T_FUNCTION_CALL]) &&
!in_array($parsed[1], [
'alpha',
'attr',
'calc',
'cubic-bezier',
'env',
'grayscale',
'hsl',
'hsla',
'invert',
'linear-gradient',
'min',
'max',
'radial-gradient',
'repeating-linear-gradient',
'repeating-radial-gradient',
'rgb',
'rgba',
'rotate',
'saturate',
'var',
]) &&
Compiler::isNativeFunction($parsed[1])
) {
return false;
}
switch ($parsed[0]) {
case Type::T_BLOCK:
case Type::T_KEYWORD:
case Type::T_NULL:
case Type::T_NUMBER:
case Type::T_MEDIA:
return $parsed;
case Type::T_COMMENT:
if (isset($parsed[2])) {
return false;
}
return $parsed;
case Type::T_DIRECTIVE:
if (is_array($parsed[1])) {
$parsed[1][1] = $this->isPlainCssValidElement($parsed[1][1]);
if (! $parsed[1][1]) {
return false;
}
}
return $parsed;
case Type::T_IMPORT:
if ($parsed[1][0] === Type::T_LIST) {
return false;
}
$parsed[1] = $this->isPlainCssValidElement($parsed[1]);
if ($parsed[1] === false) {
return false;
}
return $parsed;
case Type::T_STRING:
foreach ($parsed[2] as $k => $substr) {
if (is_array($substr)) {
$parsed[2][$k] = $this->isPlainCssValidElement($substr);
if (! $parsed[2][$k]) {
return false;
}
}
}
return $parsed;
case Type::T_LIST:
if (!empty($parsed['enclosing'])) {
return false;
}
foreach ($parsed[2] as $k => $listElement) {
$parsed[2][$k] = $this->isPlainCssValidElement($listElement);
if (! $parsed[2][$k]) {
return false;
}
}
return $parsed;
case Type::T_ASSIGN:
foreach ([1, 2, 3] as $k) {
if (! empty($parsed[$k])) {
$parsed[$k] = $this->isPlainCssValidElement($parsed[$k]);
if (! $parsed[$k]) {
return false;
}
}
}
return $parsed;
case Type::T_EXPRESSION:
list( ,$op, $lhs, $rhs, $inParens, $whiteBefore, $whiteAfter) = $parsed;
if (! $allowExpression && ! in_array($op, ['and', 'or', '/'])) {
return false;
}
$lhs = $this->isPlainCssValidElement($lhs, true);
if (! $lhs) {
return false;
}
$rhs = $this->isPlainCssValidElement($rhs, true);
if (! $rhs) {
return false;
}
return [
Type::T_STRING,
'', [
$this->inParens ? '(' : '',
$lhs,
($whiteBefore ? ' ' : '') . $op . ($whiteAfter ? ' ' : ''),
$rhs,
$this->inParens ? ')' : ''
]
];
case Type::T_UNARY:
$parsed[2] = $this->isPlainCssValidElement($parsed[2]);
if (! $parsed[2]) {
return false;
}
return $parsed;
case Type::T_FUNCTION:
$argsList = $parsed[2];
foreach ($argsList[2] as $argElement) {
if (! $this->isPlainCssValidElement($argElement)) {
return false;
}
}
return $parsed;
case Type::T_FUNCTION_CALL:
$parsed[0] = Type::T_FUNCTION;
$argsList = [Type::T_LIST, ',', []];
foreach ($parsed[2] as $arg) {
if ($arg[0] || ! empty($arg[2])) {
// no named arguments possible in a css function call
// nor ... argument
return false;
}
$arg = $this->isPlainCssValidElement($arg[1], $parsed[1] === 'calc');
if (! $arg) {
return false;
}
$argsList[2][] = $arg;
}
$parsed[2] = $argsList;
return $parsed;
}
return false;
}
/**
* Match string looking for either ending delim, escape, or string interpolation
*
* {@internal This is a workaround for preg_match's 250K string match limit. }}
*
* @param array $m Matches (passed by reference)
* @param string $delim Delimiter
*
* @return boolean True if match; false otherwise
*/
protected function matchString(&$m, $delim)
{
$token = null;
$end = strlen($this->buffer);
// look for either ending delim, escape, or string interpolation
foreach (['#{', '\', "r", $delim] as $lookahead) {
$pos = strpos($this->buffer, $lookahead, $this->count);
if ($pos !== false && $pos < $end) {
$end = $pos;
$token = $lookahead;
}
}
if (! isset($token)) {
return false;
}
$match = substr($this->buffer, $this->count, $end - $this->count);
$m = [
$match . $token,
$match,
$token
];
$this->count = $end + strlen($token);
return true;
}
/**
* Try to match something on head of buffer
*
* @param string $regex
* @param array $out
* @param boolean $eatWhitespace
*
* @return boolean
*/
protected function match($regex, &$out, $eatWhitespace = null)
{
$r = '/' . $regex . '/' . $this->patternModifiers;
if (! preg_match($r, $this->buffer, $out, null, $this->count)) {
return false;
}
$this->count += strlen($out[0]);
if (! isset($eatWhitespace)) {
$eatWhitespace = $this->eatWhiteDefault;
}
if ($eatWhitespace) {
$this->whitespace();
}
return true;
}
/**
* Match a single string
*
* @param string $char
* @param boolean $eatWhitespace
*
* @return boolean
*/
protected function matchChar($char, $eatWhitespace = null)
{
if (! isset($this->buffer[$this->count]) || $this->buffer[$this->count] !== $char) {
return false;
}
$this->count++;
if (! isset($eatWhitespace)) {
$eatWhitespace = $this->eatWhiteDefault;
}
if ($eatWhitespace) {
$this->whitespace();
}
return true;
}
/**
* Match literal string
*
* @param string $what
* @param integer $len
* @param boolean $eatWhitespace
*
* @return boolean
*/
protected function literal($what, $len, $eatWhitespace = null)
{
if (strcasecmp(substr($this->buffer, $this->count, $len), $what) !== 0) {
return false;
}
$this->count += $len;
if (! isset($eatWhitespace)) {
$eatWhitespace = $this->eatWhiteDefault;
}
if ($eatWhitespace) {
$this->whitespace();
}
return true;
}
/**
* Match some whitespace
*
* @return boolean
*/
protected function whitespace()
{
$gotWhite = false;
while (preg_match(static::$whitePattern, $this->buffer, $m, null, $this->count)) {
if (isset($m[1]) && empty($this->commentsSeen[$this->count])) {
// comment that are kept in the output CSS
$comment = [];
$startCommentCount = $this->count;
$endCommentCount = $this->count + strlen($m[1]);
// find interpolations in comment
$p = strpos($this->buffer, '#{', $this->count);
while ($p !== false && $p < $endCommentCount) {
$c = substr($this->buffer, $this->count, $p - $this->count);
$comment[] = $c;
$this->count = $p;
$out = null;
if ($this->interpolation($out)) {
// keep right spaces in the following string part
if ($out[3]) {
while ($this->buffer[$this->count - 1] !== '}') {
$this->count--;
}
$out[3] = '';
}
$comment[] = [Type::T_COMMENT, substr($this->buffer, $p, $this->count - $p), $out];
} else {
$comment[] = substr($this->buffer, $this->count, 2);
$this->count += 2;
}
$p = strpos($this->buffer, '#{', $this->count);
}
// remaining part
$c = substr($this->buffer, $this->count, $endCommentCount - $this->count);
if (! $comment) {
// single part static comment
$this->appendComment([Type::T_COMMENT, $c]);
} else {
$comment[] = $c;
$staticComment = substr($this->buffer, $startCommentCount, $endCommentCount - $startCommentCount);
$this->appendComment([Type::T_COMMENT, $staticComment, [Type::T_STRING, '', $comment]]);
}
$this->commentsSeen[$startCommentCount] = true;
$this->count = $endCommentCount;
} else {
// comment that are ignored and not kept in the output css
$this->count += strlen($m[0]);
// silent comments are not allowed in plain CSS files
! $this->cssOnly
|| ! strlen(trim($m[0]))
|| $this->assertPlainCssValid(false, $this->count - strlen($m[0]));
}
$gotWhite = true;
}
return $gotWhite;
}
/**
* Append comment to current block
*
* @param array $comment
*/
protected function appendComment($comment)
{
if (! $this->discardComments) {
$this->env->comments[] = $comment;
}
}
/**
* Append statement to current block
*
* @param array|null $statement
* @param integer $pos
*/
protected function append($statement, $pos = null)
{
if (! is_null($statement)) {
! $this->cssOnly || ($statement = $this->assertPlainCssValid($statement, $pos));
if (! is_null($pos)) {
list($line, $column) = $this->getSourcePosition($pos);
$statement[static::SOURCE_LINE] = $line;
$statement[static::SOURCE_COLUMN] = $column;
$statement[static::SOURCE_INDEX] = $this->sourceIndex;
}
$this->env->children[] = $statement;
}
$comments = $this->env->comments;
if ($comments) {
$this->env->children = array_merge($this->env->children, $comments);
$this->env->comments = [];
}
}
/**
* Returns last child was appended
*
* @return array|null
*/
protected function last()
{
$i = count($this->env->children) - 1;
if (isset($this->env->children[$i])) {
return $this->env->children[$i];
}
}
/**
* Parse media query list
*
* @param array $out
*
* @return boolean
*/
protected function mediaQueryList(&$out)
{
return $this->genericList($out, 'mediaQuery', ',', false);
}
/**
* Parse media query
*
* @param array $out
*
* @return boolean
*/
protected function mediaQuery(&$out)
{
$expressions = null;
$parts = [];
if (
($this->literal('only', 4) && ($only = true) ||
$this->literal('not', 3) && ($not = true) || true) &&
$this->mixedKeyword($mediaType)
) {
$prop = [Type::T_MEDIA_TYPE];
if (isset($only)) {
$prop[] = [Type::T_KEYWORD, 'only'];
}
if (isset($not)) {
$prop[] = [Type::T_KEYWORD, 'not'];
}
$media = [Type::T_LIST, '', []];
foreach ((array) $mediaType as $type) {
if (is_array($type)) {
$media[2][] = $type;
} else {
$media[2][] = [Type::T_KEYWORD, $type];
}
}
$prop[] = $media;
$parts[] = $prop;
}
if (empty($parts) || $this->literal('and', 3)) {
$this->genericList($expressions, 'mediaExpression', 'and', false);
if (is_array($expressions)) {
$parts = array_merge($parts, $expressions[2]);
}
}
$out = $parts;
return true;
}
/**
* Parse supports query
*
* @param array $out
*
* @return boolean
*/
protected function supportsQuery(&$out)
{
$expressions = null;
$parts = [];
$s = $this->count;
$not = false;
if (
($this->literal('not', 3) && ($not = true) || true) &&
$this->matchChar('(') &&
($this->expression($property)) &&
$this->literal(': ', 2) &&
$this->valueList($value) &&
$this->matchChar(')')
) {
$support = [Type::T_STRING, '', [[Type::T_KEYWORD, ($not ? 'not ' : '') . '(']]];
$support[2][] = $property;
$support[2][] = [Type::T_KEYWORD, ': '];
$support[2][] = $value;
$support[2][] = [Type::T_KEYWORD, ')'];
$parts[] = $support;
$s = $this->count;
} else {
$this->seek($s);
}
if (
$this->matchChar('(') &&
$this->supportsQuery($subQuery) &&
$this->matchChar(')')
) {
$parts[] = [Type::T_STRING, '', [[Type::T_KEYWORD, '('], $subQuery, [Type::T_KEYWORD, ')']]];
$s = $this->count;
} else {
$this->seek($s);
}
if (
$this->literal('not', 3) &&
$this->supportsQuery($subQuery)
) {
$parts[] = [Type::T_STRING, '', [[Type::T_KEYWORD, 'not '], $subQuery]];
$s = $this->count;
} else {
$this->seek($s);
}
if (
$this->literal('selector(', 9) &&
$this->selector($selector) &&
$this->matchChar(')')
) {
$support = [Type::T_STRING, '', [[Type::T_KEYWORD, 'selector(']]];
$selectorList = [Type::T_LIST, '', []];
foreach ($selector as $sc) {
$compound = [Type::T_STRING, '', []];
foreach ($sc as $scp) {
if (is_array($scp)) {
$compound[2][] = $scp;
} else {
$compound[2][] = [Type::T_KEYWORD, $scp];
}
}
$selectorList[2][] = $compound;
}
$support[2][] = $selectorList;
$support[2][] = [Type::T_KEYWORD, ')'];
$parts[] = $support;
$s = $this->count;
} else {
$this->seek($s);
}
if ($this->variable($var) or $this->interpolation($var)) {
$parts[] = $var;
$s = $this->count;
} else {
$this->seek($s);
}
if (
$this->literal('and', 3) &&
$this->genericList($expressions, 'supportsQuery', ' and', false)
) {
array_unshift($expressions[2], [Type::T_STRING, '', $parts]);
$parts = [$expressions];
$s = $this->count;
} else {
$this->seek($s);
}
if (
$this->literal('or', 2) &&
$this->genericList($expressions, 'supportsQuery', ' or', false)
) {
array_unshift($expressions[2], [Type::T_STRING, '', $parts]);
$parts = [$expressions];
$s = $this->count;
} else {
$this->seek($s);
}
if (count($parts)) {
if ($this->eatWhiteDefault) {
$this->whitespace();
}
$out = [Type::T_STRING, '', $parts];
return true;
}
return false;
}
/**
* Parse media expression
*
* @param array $out
*
* @return boolean
*/
protected function mediaExpression(&$out)
{
$s = $this->count;
$value = null;
if (
$this->matchChar('(') &&
$this->expression($feature) &&
($this->matchChar(':') &&
$this->expression($value) || true) &&
$this->matchChar(')')
) {
$out = [Type::T_MEDIA_EXPRESSION, $feature];
if ($value) {
$out[] = $value;
}
return true;
}
$this->seek($s);
return false;
}
/**
* Parse argument values
*
* @param array $out
*
* @return boolean
*/
protected function argValues(&$out)
{
$discardComments = $this->discardComments;
$this->discardComments = true;
if ($this->genericList($list, 'argValue', ',', false)) {
$out = $list[2];
$this->discardComments = $discardComments;
return true;
}
$this->discardComments = $discardComments;
return false;
}
/**
* Parse argument value
*
* @param array $out
*
* @return boolean
*/
protected function argValue(&$out)
{
$s = $this->count;
$keyword = null;
if (! $this->variable($keyword) || ! $this->matchChar(':')) {
$this->seek($s);
$keyword = null;
}
if ($this->genericList($value, 'expression', '', true)) {
$out = [$keyword, $value, false];
$s = $this->count;
if ($this->literal('...', 3)) {
$out[2] = true;
} else {
$this->seek($s);
}
return true;
}
return false;
}
/**
* Check if a generic directive is known to be able to allow almost any syntax or not
* @param mixed $directiveName
* @return bool
*/
protected function isKnownGenericDirective($directiveName)
{
if (is_array($directiveName) && is_string(reset($directiveName))) {
$directiveName = reset($directiveName);
}
if (! is_string($directiveName)) {
return false;
}
if (
in_array($directiveName, [
'at-root',
'media',
'mixin',
'include',
'scssphp-import-once',
'import',
'extend',
'function',
'break',
'continue',
'return',
'each',
'while',
'for',
'if',
'debug',
'warn',
'error',
'content',
'else',
'charset',
'supports',
// Todo
'use',
'forward',
])
) {
return true;
}
return false;
}
/**
* Parse directive value list that considers $vars as keyword
*
* @param array $out
* @param boolean|string $endChar
*
* @return boolean
*/
protected function directiveValue(&$out, $endChar = false)
{
$s = $this->count;
if ($this->variable($out)) {
if ($endChar && $this->matchChar($endChar, false)) {
return true;
}
if (! $endChar && $this->end()) {
return true;
}
}
$this->seek($s);
if (is_string($endChar) && $this->openString($endChar ? $endChar : ';', $out, null, null, true, ";}{")) {
if ($endChar && $this->matchChar($endChar, false)) {
return true;
}
$ss = $this->count;
if (!$endChar && $this->end()) {
$this->seek($ss);
return true;
}
}
$this->seek($s);
$allowVars = $this->allowVars;
$this->allowVars = false;
$res = $this->genericList($out, 'spaceList', ',');
$this->allowVars = $allowVars;
if ($res) {
if ($endChar && $this->matchChar($endChar, false)) {
return true;
}
if (! $endChar && $this->end()) {
return true;
}
}
$this->seek($s);
if ($endChar && $this->matchChar($endChar, false)) {
return true;
}
return false;
}
/**
* Parse comma separated value list
*
* @param array $out
*
* @return boolean
*/
protected function valueList(&$out)
{
$discardComments = $this->discardComments;
$this->discardComments = true;
$res = $this->genericList($out, 'spaceList', ',');
$this->discardComments = $discardComments;
return $res;
}
/**
* Parse a function call, where externals () are part of the call
* and not of the value list
*
* @param $out
* @param bool $mandatoryEnclos
* @param null|string $charAfter
* @param null|bool $eatWhiteSp
* @return bool
*/
protected function functionCallArgumentsList(&$out, $mandatoryEnclos = true, $charAfter = null, $eatWhiteSp = null)
{
$s = $this->count;
if (
$this->matchChar('(') &&
$this->valueList($out) &&
$this->matchChar(')') &&
($charAfter ? $this->matchChar($charAfter, $eatWhiteSp) : $this->end())
) {
return true;
}
if (! $mandatoryEnclos) {
$this->seek($s);
if (
$this->valueList($out) &&
($charAfter ? $this->matchChar($charAfter, $eatWhiteSp) : $this->end())
) {
return true;
}
}
$this->seek($s);
return false;
}
/**
* Parse space separated value list
*
* @param array $out
*
* @return boolean
*/
protected function spaceList(&$out)
{
return $this->genericList($out, 'expression');
}
/**
* Parse generic list
*
* @param array $out
* @param string $parseItem The name of the method used to parse items
* @param string $delim
* @param boolean $flatten
*
* @return boolean
*/
protected function genericList(&$out, $parseItem, $delim = '', $flatten = true)
{
$s = $this->count;
$items = [];
$value = null;
while ($this->$parseItem($value)) {
$trailing_delim = false;
$items[] = $value;
if ($delim) {
if (! $this->literal($delim, strlen($delim))) {
break;
}
$trailing_delim = true;
} else {
// if no delim watch that a keyword didn't eat the single/double quote
// from the following starting string
if ($value[0] === Type::T_KEYWORD) {
$word = $value[1];
$last_char = substr($word, -1);
if (
strlen($word) > 1 &&
in_array($last_char, [ "'", '"']) &&
substr($word, -2, 1) !== '\'
) {
// if there is a non escaped opening quote in the keyword, this seems unlikely a mistake
$word = str_replace('\' . $last_char, '\\', $word);
if (strpos($word, $last_char) < strlen($word) - 1) {
continue;
}
$currentCount = $this->count;
// let's try to rewind to previous char and try a parse
$this->count--;
// in case the keyword also eat spaces
while (substr($this->buffer, $this->count, 1) !== $last_char) {
$this->count--;
}
$nextValue = null;
if ($this->$parseItem($nextValue)) {
if ($nextValue[0] === Type::T_KEYWORD && $nextValue[1] === $last_char) {
// bad try, forget it
$this->seek($currentCount);
continue;
}
if ($nextValue[0] !== Type::T_STRING) {
// bad try, forget it
$this->seek($currentCount);
continue;
}
// OK it was a good idea
$value[1] = substr($value[1], 0, -1);
array_pop($items);
$items[] = $value;
$items[] = $nextValue;
} else {
// bad try, forget it
$this->seek($currentCount);
continue;
}
}
}
}
}
if (! $items) {
$this->seek($s);
return false;
}
if ($trailing_delim) {
$items[] = [Type::T_NULL];
}
if ($flatten && count($items) === 1) {
$out = $items[0];
} else {
$out = [Type::T_LIST, $delim, $items];
}
return true;
}
/**
* Parse expression
*
* @param array $out
* @param boolean $listOnly
* @param boolean $lookForExp
*
* @return boolean
*/
protected function expression(&$out, $listOnly = false, $lookForExp = true)
{
$s = $this->count;
$discard = $this->discardComments;
$this->discardComments = true;
$allowedTypes = ($listOnly ? [Type::T_LIST] : [Type::T_LIST, Type::T_MAP]);
if ($this->matchChar('(')) {
if ($this->enclosedExpression($lhs, $s, ')', $allowedTypes)) {
if ($lookForExp) {
$out = $this->expHelper($lhs, 0);
} else {
$out = $lhs;
}
$this->discardComments = $discard;
return true;
}
$this->seek($s);
}
if (in_array(Type::T_LIST, $allowedTypes) && $this->matchChar('[')) {
if ($this->enclosedExpression($lhs, $s, ']', [Type::T_LIST])) {
if ($lookForExp) {
$out = $this->expHelper($lhs, 0);
} else {
$out = $lhs;
}
$this->discardComments = $discard;
return true;
}
$this->seek($s);
}
if (! $listOnly && $this->value($lhs)) {
if ($lookForExp) {
$out = $this->expHelper($lhs, 0);
} else {
$out = $lhs;
}
$this->discardComments = $discard;
return true;
}
$this->discardComments = $discard;
return false;
}
/**
* Parse expression specifically checking for lists in parenthesis or brackets
*
* @param array $out
* @param integer $s
* @param string $closingParen
* @param array $allowedTypes
*
* @return boolean
*/
protected function enclosedExpression(&$out, $s, $closingParen = ')', $allowedTypes = [Type::T_LIST, Type::T_MAP])
{
if ($this->matchChar($closingParen) && in_array(Type::T_LIST, $allowedTypes)) {
$out = [Type::T_LIST, '', []];
switch ($closingParen) {
case ')':
$out['enclosing'] = 'parent'; // parenthesis list
break;
case ']':
$out['enclosing'] = 'bracket'; // bracketed list
break;
}
return true;
}
if (
$this->valueList($out) &&
$this->matchChar($closingParen) && ! ($closingParen === ')' &&
in_array($out[0], [Type::T_EXPRESSION, Type::T_UNARY])) &&
in_array(Type::T_LIST, $allowedTypes)
) {
if ($out[0] !== Type::T_LIST || ! empty($out['enclosing'])) {
$out = [Type::T_LIST, '', [$out]];
}
switch ($closingParen) {
case ')':
$out['enclosing'] = 'parent'; // parenthesis list
break;
case ']':
$out['enclosing'] = 'bracket'; // bracketed list
break;
}
return true;
}
$this->seek($s);
if (in_array(Type::T_MAP, $allowedTypes) && $this->map($out)) {
return true;
}
return false;
}
/**
* Parse left-hand side of subexpression
*
* @param array $lhs
* @param integer $minP
*
* @return array
*/
protected function expHelper($lhs, $minP)
{
$operators = static::$operatorPattern;
$ss = $this->count;
$whiteBefore = isset($this->buffer[$this->count - 1]) &&
ctype_space($this->buffer[$this->count - 1]);
while ($this->match($operators, $m, false) && static::$precedence[$m[1]] >= $minP) {
$whiteAfter = isset($this->buffer[$this->count]) &&
ctype_space($this->buffer[$this->count]);
$varAfter = isset($this->buffer[$this->count]) &&
$this->buffer[$this->count] === '$';
$this->whitespace();
$op = $m[1];
// don't turn negative numbers into expressions
if ($op === '-' && $whiteBefore && ! $whiteAfter && ! $varAfter) {
break;
}
if (! $this->value($rhs) && ! $this->expression($rhs, true, false)) {
break;
}
if ($op === '-' && ! $whiteAfter && $rhs[0] === Type::T_KEYWORD) {
break;
}
// peek and see if rhs belongs to next operator
if ($this->peek($operators, $next) && static::$precedence[$next[1]] > static::$precedence[$op]) {
$rhs = $this->expHelper($rhs, static::$precedence[$next[1]]);
}
$lhs = [Type::T_EXPRESSION, $op, $lhs, $rhs, $this->inParens, $whiteBefore, $whiteAfter];
$ss = $this->count;
$whiteBefore = isset($this->buffer[$this->count - 1]) &&
ctype_space($this->buffer[$this->count - 1]);
}
$this->seek($ss);
return $lhs;
}
/**
* Parse value
*
* @param array $out
*
* @return boolean
*/
protected function value(&$out)
{
if (! isset($this->buffer[$this->count])) {
return false;
}
$s = $this->count;
$char = $this->buffer[$this->count];
if (
$this->literal('url(', 4) &&
$this->match('data:([a-z]+)/([a-z0-9.+-]+);base64,', $m, false)
) {
$len = strspn(
$this->buffer,
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwyxz0123456789+/=',
$this->count
);
$this->count += $len;
if ($this->matchChar(')')) {
$content = substr($this->buffer, $s, $this->count - $s);
$out = [Type::T_KEYWORD, $content];
return true;
}
}
$this->seek($s);
if (
$this->literal('url(', 4, false) &&
$this->match('s*(//[^s)]+)s*', $m)
) {
$content = 'url(' . $m[1];
if ($this->matchChar(')')) {
$content .= ')';
$out = [Type::T_KEYWORD, $content];
return true;
}
}
$this->seek($s);
// not
if ($char === 'n' && $this->literal('not', 3, false)) {
if (
$this->whitespace() &&
$this->value($inner)
) {
$out = [Type::T_UNARY, 'not', $inner, $this->inParens];
return true;
}
$this->seek($s);
if ($this->parenValue($inner)) {
$out = [Type::T_UNARY, 'not', $inner, $this->inParens];
return true;
}
$this->seek($s);
}
// addition
if ($char === '+') {
$this->count++;
$follow_white = $this->whitespace();
if ($this->value($inner)) {
$out = [Type::T_UNARY, '+', $inner, $this->inParens];
return true;
}
if ($follow_white) {
$out = [Type::T_KEYWORD, $char];
return true;
}
$this->seek($s);
return false;
}
// negation
if ($char === '-') {
if ($this->customProperty($out)) {
return true;
}
$this->count++;
$follow_white = $this->whitespace();
if ($this->variable($inner) || $this->unit($inner) || $this->parenValue($inner)) {
$out = [Type::T_UNARY, '-', $inner, $this->inParens];
return true;
}
if (
$this->keyword($inner) &&
! $this->func($inner, $out)
) {
$out = [Type::T_UNARY, '-', $inner, $this->inParens];
return true;
}
if ($follow_white) {
$out = [Type::T_KEYWORD, $char];
return true;
}
$this->seek($s);
}
// paren
if ($char === '(' && $this->parenValue($out)) {
return true;
}
if ($char === '#') {
if ($this->interpolation($out) || $this->color($out)) {
return true;
}
$this->count++;
if ($this->keyword($keyword)) {
$out = [Type::T_KEYWORD, '#' . $keyword];
return true;
}
$this->count--;
}
if ($this->matchChar('&', true)) {
$out = [Type::T_SELF];
return true;
}
if ($char === '$' && $this->variable($out)) {
return true;
}
if ($char === 'p' && $this->progid($out)) {
return true;
}
if (($char === '"' || $char === "'") && $this->string($out)) {
return true;
}
if ($this->unit($out)) {
return true;
}
// unicode range with wildcards
if (
$this->literal('U+', 2) &&
$this->match('?+|([0-9A-F]+(?+|(-[0-9A-F]+))?)', $m, false)
) {
$unicode = explode('-', $m[0]);
if (strlen(reset($unicode)) <= 6 && strlen(end($unicode)) <= 6) {
$out = [Type::T_KEYWORD, 'U+' . $m[0]];
return true;
}
$this->count -= strlen($m[0]) + 2;
}
if ($this->keyword($keyword, false)) {
if ($this->func($keyword, $out)) {
return true;
}
$this->whitespace();
if ($keyword === 'null') {
$out = [Type::T_NULL];
} else {
$out = [Type::T_KEYWORD, $keyword];
}
return true;
}
return false;
}
/**
* Parse parenthesized value
*
* @param array $out
*
* @return boolean
*/
protected function parenValue(&$out)
{
$s = $this->count;
$inParens = $this->inParens;
if ($this->matchChar('(')) {
if ($this->matchChar(')')) {
$out = [Type::T_LIST, '', []];
return true;
}
$this->inParens = true;
if (
$this->expression($exp) &&
$this->matchChar(')')
) {
$out = $exp;
$this->inParens = $inParens;
return true;
}
}
$this->inParens = $inParens;
$this->seek($s);
return false;
}
/**
* Parse "progid:"
*
* @param array $out
*
* @return boolean
*/
protected function progid(&$out)
{
$s = $this->count;
if (
$this->literal('progid:', 7, false) &&
$this->openString('(', $fn) &&
$this->matchChar('(')
) {
$this->openString(')', $args, '(');
if ($this->matchChar(')')) {
$out = [Type::T_STRING, '', [
'progid:', $fn, '(', $args, ')'
]];
return true;
}
}
$this->seek($s);
return false;
}
/**
* Parse function call
*
* @param string $name
* @param array $func
*
* @return boolean
*/
protected function func($name, &$func)
{
$s = $this->count;
if ($this->matchChar('(')) {
if ($name === 'alpha' && $this->argumentList($args)) {
$func = [Type::T_FUNCTION, $name, [Type::T_STRING, '', $args]];
return true;
}
if ($name !== 'expression' && ! preg_match('/^(-[a-z]+-)?calc$/', $name)) {
$ss = $this->count;
if (
$this->argValues($args) &&
$this->matchChar(')')
) {
$func = [Type::T_FUNCTION_CALL, $name, $args];
return true;
}
$this->seek($ss);
}
if (
($this->openString(')', $str, '(') || true) &&
$this->matchChar(')')
) {
$args = [];
if (! empty($str)) {
$args[] = [null, [Type::T_STRING, '', [$str]]];
}
$func = [Type::T_FUNCTION_CALL, $name, $args];
return true;
}
}
$this->seek($s);
return false;
}
/**
* Parse function call argument list
*
* @param array $out
*
* @return boolean
*/
protected function argumentList(&$out)
{
$s = $this->count;
$this->matchChar('(');
$args = [];
while ($this->keyword($var)) {
if (
$this->matchChar('=') &&
$this->expression($exp)
) {
$args[] = [Type::T_STRING, '', [$var . '=']];
$arg = $exp;
} else {
break;
}
$args[] = $arg;
if (! $this->matchChar(',')) {
break;
}
$args[] = [Type::T_STRING, '', [', ']];
}
if (! $this->matchChar(')') || ! $args) {
$this->seek($s);
return false;
}
$out = $args;
return true;
}
/**
* Parse mixin/function definition argument list
*
* @param array $out
*
* @return boolean
*/
protected function argumentDef(&$out)
{
$s = $this->count;
$this->matchChar('(');
$args = [];
while ($this->variable($var)) {
$arg = [$var[1], null, false];
$ss = $this->count;
if (
$this->matchChar(':') &&
$this->genericList($defaultVal, 'expression', '', true)
) {
$arg[1] = $defaultVal;
} else {
$this->seek($ss);
}
$ss = $this->count;
if ($this->literal('...', 3)) {
$sss = $this->count;
if (! $this->matchChar(')')) {
throw $this->parseError('... has to be after the final argument');
}
$arg[2] = true;
$this->seek($sss);
} else {
$this->seek($ss);
}
$args[] = $arg;
if (! $this->matchChar(',')) {
break;
}
}
if (! $this->matchChar(')')) {
$this->seek($s);
return false;
}
$out = $args;
return true;
}
/**
* Parse map
*
* @param array $out
*
* @return boolean
*/
protected function map(&$out)
{
$s = $this->count;
if (! $this->matchChar('(')) {
return false;
}
$keys = [];
$values = [];
while (
$this->genericList($key, 'expression', '', true) &&
$this->matchChar(':') &&
$this->genericList($value, 'expression', '', true)
) {
$keys[] = $key;
$values[] = $value;
if (! $this->matchChar(',')) {
break;
}
}
if (! $keys || ! $this->matchChar(')')) {
$this->seek($s);
return false;
}
$out = [Type::T_MAP, $keys, $values];
return true;
}
/**
* Parse color
*
* @param array $out
*
* @return boolean
*/
protected function color(&$out)
{
$s = $this->count;
if ($this->match('(#([0-9a-f]+)b)', $m)) {
if (in_array(strlen($m[2]), [3,4,6,8])) {
$out = [Type::T_KEYWORD, $m[0]];
return true;
}
$this->seek($s);
return false;
}
return false;
}
/**
* Parse number with unit
*
* @param array $unit
*
* @return boolean
*/
protected function unit(&$unit)
{
$s = $this->count;
if ($this->match('([0-9]*(.)?[0-9]+)([%a-zA-Z]+)?', $m, false)) {
if (strlen($this->buffer) === $this->count || ! ctype_digit($this->buffer[$this->count])) {
$this->whitespace();
$unit = new NodeNumber($m[1], empty($m[3]) ? '' : $m[3]);
return true;
}
$this->seek($s);
}
return false;
}
/**
* Parse string
*
* @param array $out
*
* @return boolean
*/
protected function string(&$out, $keepDelimWithInterpolation = false)
{
$s = $this->count;
if ($this->matchChar('"', false)) {
$delim = '"';
} elseif ($this->matchChar("'", false)) {
$delim = "'";
} else {
return false;
}
$content = [];
$oldWhite = $this->eatWhiteDefault;
$this->eatWhiteDefault = false;
$hasInterpolation = false;
while ($this->matchString($m, $delim)) {
if ($m[1] !== '') {
$content[] = $m[1];
}
if ($m[2] === '#{') {
$this->count -= strlen($m[2]);
if ($this->interpolation($inter, false)) {
$content[] = $inter;
$hasInterpolation = true;
} else {
$this->count += strlen($m[2]);
$content[] = '#{'; // ignore it
}
} elseif ($m[2] === "r") {
$content[] = chr(10);
// TODO : warning
# DEPRECATION WARNING on line x, column y of zzz:
# Unescaped multiline strings are deprecated and will be removed in a future version of Sass.
# To include a newline in a string, use "a" or "a " as in CSS.
if ($this->matchChar("n", false)) {
$content[] = ' ';
}
} elseif ($m[2] === '\') {
if (
$this->literal("rn", 2, false) ||
$this->matchChar("r", false) ||
$this->matchChar("n", false) ||
$this->matchChar("f", false)
) {
// this is a continuation escaping, to be ignored
} elseif ($this->matchEscapeCharacter($c)) {
$content[] = $c;
} else {
throw $this->parseError('Unterminated escape sequence');
}
} else {
$this->count -= strlen($delim);
break; // delim
}
}
$this->eatWhiteDefault = $oldWhite;
if ($this->literal($delim, strlen($delim))) {
if ($hasInterpolation && ! $keepDelimWithInterpolation) {
$delim = '"';
}
$out = [Type::T_STRING, $delim, $content];
return true;
}
$this->seek($s);
return false;
}
protected function matchEscapeCharacter(&$out, $inKeywords = false)
{
$s = $this->count;
if ($this->match('[a-f0-9]', $m, false)) {
$hex = $m[0];
for ($i = 5; $i--;) {
if ($this->match('[a-f0-9]', $m, false)) {
$hex .= $m[0];
} else {
break;
}
}
// CSS allows Unicode escape sequences to be followed by a delimiter space
// (necessary in some cases for shorter sequences to disambiguate their end)
$this->matchChar(' ', false);
$value = hexdec($hex);
if (!$inKeywords && ($value == 0 || ($value >= 0xD800 && $value <= 0xDFFF) || $value >= 0x10FFFF)) {
$out = "xEFxBFxBD"; // "u{FFFD}" but with a syntax supported on PHP 5
} elseif ($value < 0x20) {
$out = Util::mbChr($value);
} else {
$out = Util::mbChr($value);
}
return true;
}
if ($this->match('.', $m, false)) {
if ($inKeywords && in_array($m[0], ["'",'"','@','&',' ','\',':','/','%'])) {
$this->seek($s);
return false;
}
$out = $m[0];
return true;
}
return false;
}
/**
* Parse keyword or interpolation
*
* @param array $out
* @param boolean $restricted
*
* @return boolean
*/
protected function mixedKeyword(&$out, $restricted = false)
{
$parts = [];
$oldWhite = $this->eatWhiteDefault;
$this->eatWhiteDefault = false;
for (;;) {
if ($restricted ? $this->restrictedKeyword($key) : $this->keyword($key)) {
$parts[] = $key;
continue;
}
if ($this->interpolation($inter)) {
$parts[] = $inter;
continue;
}
break;
}
$this->eatWhiteDefault = $oldWhite;
if (! $parts) {
return false;
}
if ($this->eatWhiteDefault) {
$this->whitespace();
}
$out = $parts;
return true;
}
/**
* Parse an unbounded string stopped by $end
*
* @param string $end
* @param array $out
* @param string $nestOpen
* @param string $nestClose
* @param boolean $rtrim
* @param string $disallow
*
* @return boolean
*/
protected function openString($end, &$out, $nestOpen = null, $nestClose = null, $rtrim = true, $disallow = null)
{
$oldWhite = $this->eatWhiteDefault;
$this->eatWhiteDefault = false;
if ($nestOpen && ! $nestClose) {
$nestClose = $end;
}
$patt = ($disallow ? '[^' . $this->pregQuote($disallow) . ']' : '.');
$patt = '(' . $patt . '*?)(['"]|#{|'
. $this->pregQuote($end) . '|'
. (($nestClose && $nestClose !== $end) ? $this->pregQuote($nestClose) . '|' : '')
. static::$commentPattern . ')';
$nestingLevel = 0;
$content = [];
while ($this->match($patt, $m, false)) {
if (isset($m[1]) && $m[1] !== '') {
$content[] = $m[1];
if ($nestOpen) {
$nestingLevel += substr_count($m[1], $nestOpen);
}
}
$tok = $m[2];
$this->count -= strlen($tok);
if ($tok === $end && ! $nestingLevel) {
break;
}
if ($tok === $nestClose) {
$nestingLevel--;
}
if (($tok === "'" || $tok === '"') && $this->string($str, true)) {
$content[] = $str;
continue;
}
if ($tok === '#{' && $this->interpolation($inter)) {
$content[] = $inter;
continue;
}
$content[] = $tok;
$this->count += strlen($tok);
}
$this->eatWhiteDefault = $oldWhite;
if (! $content || $tok !== $end) {
return false;
}
// trim the end
if ($rtrim && is_string(end($content))) {
$content[count($content) - 1] = rtrim(end($content));
}
$out = [Type::T_STRING, '', $content];
return true;
}
/**
* Parser interpolation
*
* @param string|array $out
* @param boolean $lookWhite save information about whitespace before and after
*
* @return boolean
*/
protected function interpolation(&$out, $lookWhite = true)
{
$oldWhite = $this->eatWhiteDefault;
$allowVars = $this->allowVars;
$this->allowVars = true;
$this->eatWhiteDefault = true;
$s = $this->count;
if (
$this->literal('#{', 2) &&
$this->valueList($value) &&
$this->matchChar('}', false)
) {
if ($value === [Type::T_SELF]) {
$out = $value;
} else {
if ($lookWhite) {
$left = ($s > 0 && preg_match('/s/', $this->buffer[$s - 1])) ? ' ' : '';
$right = (
! empty($this->buffer[$this->count]) &&
preg_match('/s/', $this->buffer[$this->count])
) ? ' ' : '';
} else {
$left = $right = false;
}
$out = [Type::T_INTERPOLATE, $value, $left, $right];
}
$this->eatWhiteDefault = $oldWhite;
$this->allowVars = $allowVars;
if ($this->eatWhiteDefault) {
$this->whitespace();
}
return true;
}
$this->seek($s);
$this->eatWhiteDefault = $oldWhite;
$this->allowVars = $allowVars;
return false;
}
/**
* Parse property name (as an array of parts or a string)
*
* @param array $out
*
* @return boolean
*/
protected function propertyName(&$out)
{
$parts = [];
$oldWhite = $this->eatWhiteDefault;
$this->eatWhiteDefault = false;
for (;;) {
if ($this->interpolation($inter)) {
$parts[] = $inter;
continue;
}
if ($this->keyword($text)) {
$parts[] = $text;
continue;
}
if (! $parts && $this->match('[:.#]', $m, false)) {
// css hacks
$parts[] = $m[0];
continue;
}
break;
}
$this->eatWhiteDefault = $oldWhite;
if (! $parts) {
return false;
}
// match comment hack
if (preg_match(static::$whitePattern, $this->buffer, $m, null, $this->count)) {
if (! empty($m[0])) {
$parts[] = $m[0];
$this->count += strlen($m[0]);
}
}
$this->whitespace(); // get any extra whitespace
$out = [Type::T_STRING, '', $parts];
return true;
}
/**
* Parse custom property name (as an array of parts or a string)
*
* @param array $out
*
* @return boolean
*/
protected function customProperty(&$out)
{
$s = $this->count;
if (! $this->literal('--', 2, false)) {
return false;
}
$parts = ['--'];
$oldWhite = $this->eatWhiteDefault;
$this->eatWhiteDefault = false;
for (;;) {
if ($this->interpolation($inter)) {
$parts[] = $inter;
continue;
}
if ($this->matchChar('&', false)) {
$parts[] = [Type::T_SELF];
continue;
}
if ($this->variable($var)) {
$parts[] = $var;
continue;
}
if ($this->keyword($text)) {
$parts[] = $text;
continue;
}
break;
}
$this->eatWhiteDefault = $oldWhite;
if (count($parts) == 1) {
$this->seek($s);
return false;
}
$this->whitespace(); // get any extra whitespace
$out = [Type::T_STRING, '', $parts];
return true;
}
/**
* Parse comma separated selector list
*
* @param array $out
* @param string|boolean $subSelector
*
* @return boolean
*/
protected function selectors(&$out, $subSelector = false)
{
$s = $this->count;
$selectors = [];
while ($this->selector($sel, $subSelector)) {
$selectors[] = $sel;
if (! $this->matchChar(',', true)) {
break;
}
while ($this->matchChar(',', true)) {
; // ignore extra
}
}
if (! $selectors) {
$this->seek($s);
return false;
}
$out = $selectors;
return true;
}
/**
* Parse whitespace separated selector list
*
* @param array $out
* @param string|boolean $subSelector
*
* @return boolean
*/
protected function selector(&$out, $subSelector = false)
{
$selector = [];
$discardComments = $this->discardComments;
$this->discardComments = true;
for (;;) {
$s = $this->count;
if ($this->match('[>+~]+', $m, true)) {
if (
$subSelector && is_string($subSelector) && strpos($subSelector, 'nth-') === 0 &&
$m[0] === '+' && $this->match("(d+|nb)", $counter)
) {
$this->seek($s);
} else {
$selector[] = [$m[0]];
continue;
}
}
if ($this->selectorSingle($part, $subSelector)) {
$selector[] = $part;
$this->whitespace();
continue;
}
break;
}
$this->discardComments = $discardComments;
if (! $selector) {
return false;
}
$out = $selector;
return true;
}
/**
* Parse the parts that make up a selector
*
* {@internal
* div[yes=no]#something.hello.world:nth-child(-2n+1)%placeholder
* }}
*
* @param array $out
* @param string|boolean $subSelector
*
* @return boolean
*/
protected function selectorSingle(&$out, $subSelector = false)
{
$oldWhite = $this->eatWhiteDefault;
$this->eatWhiteDefault = false;
$parts = [];
if ($this->matchChar('*', false)) {
$parts[] = '*';
}
for (;;) {
if (! isset($this->buffer[$this->count])) {
break;
}
$s = $this->count;
$char = $this->buffer[$this->count];
// see if we can stop early
if ($char === '{' || $char === ',' || $char === ';' || $char === '}' || $char === '@') {
break;
}
// parsing a sub selector in () stop with the closing )
if ($subSelector && $char === ')') {
break;
}
//self
switch ($char) {
case '&':
$parts[] = Compiler::$selfSelector;
$this->count++;
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
continue 2;
case '.':
$parts[] = '.';
$this->count++;
continue 2;
case '|':
$parts[] = '|';
$this->count++;
continue 2;
}
if ($char === '\' && $this->match('\\S', $m)) {
$parts[] = $m[0];
continue;
}
if ($char === '%') {
$this->count++;
if ($this->placeholder($placeholder)) {
$parts[] = '%';
$parts[] = $placeholder;
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
continue;
}
break;
}
if ($char === '#') {
if ($this->interpolation($inter)) {
$parts[] = $inter;
! $this->cssOnly || $this->assertPlainCssValid(false, $s);
continue;
}
$parts[] = '#';
$this->count++;
continue;
}
// a pseudo selector
if ($char === ':') {
if ($this->buffer[$this->count + 1] === ':') {
$this->count += 2;
$part = '::';
} else {
$this->count++;
$part = ':';
}
if ($this->mixedKeyword($nameParts, true)) {
$parts[] = $part;
foreach ($nameParts as $sub) {
$parts[] = $sub;
}
$ss = $this->count;
if (
$nameParts === ['not'] ||
$nameParts === ['is'] ||
$nameParts === ['has'] ||
$nameParts === ['where'] ||
$nameParts === ['slotted'] ||
$nameParts === ['nth-child'] ||
$nameParts === ['nth-last-child'] ||
$nameParts === ['nth-of-type'] ||
$nameParts === ['nth-last-of-type']
) {
if (
$this->matchChar('(', true) &&
($this->selectors($subs, reset($nameParts)) || true) &&
$this->matchChar(')')
) {
$parts[] = '(';
while ($sub = array_shift($subs)) {
while ($ps = array_shift($sub)) {
foreach ($ps as &$p) {
$parts[] = $p;
}
if (count($sub) && reset($sub)) {
$parts[] = ' ';
}
}
if (count($subs) && reset($subs)) {
$parts[] = ', ';
}
}
$parts[] = ')';
} else {
$this->seek($ss);
}
} elseif (
$this->matchChar('(', true) &&
($this->openString(')', $str, '(') || true) &&
$this->matchChar(')')
) {
$parts[] = '(';
if (! empty($str)) {
$parts[] = $str;
}
$parts[] = ')';
} else {
$this->seek($ss);
}
continue;
}
}
$this->seek($s);
// 2n+1
if ($subSelector && is_string($subSelector) && strpos($subSelector, 'nth-') === 0) {
if ($this->match("(s*(+s*|-s*)?(d+|n|d+n))+", $counter)) {
$parts[] = $counter[0];
//$parts[] = str_replace(' ', '', $counter[0]);
continue;
}
}
$this->seek($s);
// attribute selector
if (
$char === '[' &&
$this->matchChar('[') &&
($this->openString(']', $str, '[') || true) &&
$this->matchChar(']')
) {
$parts[] = '[';
if (! empty($str)) {
$parts[] = $str;
}
$parts[] = ']';
continue;
}
$this->seek($s);
// for keyframes
if ($this->unit($unit)) {
$parts[] = $unit;
continue;
}
if ($this->restrictedKeyword($name)) {
$parts[] = $name;
continue;
}
break;
}
$this->eatWhiteDefault = $oldWhite;
if (! $parts) {
return false;
}
$out = $parts;
return true;
}
/**
* Parse a variable
*
* @param array $out
*
* @return boolean
*/
protected function variable(&$out)
{
$s = $this->count;
if (
$this->matchChar('$', false) &&
$this->keyword($name)
) {
if ($this->allowVars) {
$out = [Type::T_VARIABLE, $name];
} else {
$out = [Type::T_KEYWORD, '$' . $name];
}
return true;
}
$this->seek($s);
return false;
}
/**
* Parse a keyword
*
* @param string $word
* @param boolean $eatWhitespace
*
* @return boolean
*/
protected function keyword(&$word, $eatWhitespace = null)
{
$s = $this->count;
$match = $this->match(
$this->utf8
? '(([pLwx{00A0}-x{10FFFF}_-*!"']|\\[a-f0-9]{6} ?|\\[a-f0-9]{1,5}(?![a-f0-9]) ?|[\\].)([pLwx{00A0}-x{10FFFF}-_"']|\\[a-f0-9]{6} ?|\\[a-f0-9]{1,5}(?![a-f0-9]) ?|[\\].)*)'
: '(([w_-*!"']|\\[a-f0-9]{6} ?|\\[a-f0-9]{1,5}(?![a-f0-9]) ?|[\\].)([w-_"']|\\[a-f0-9]{6} ?|\\[a-f0-9]{1,5}(?![a-f0-9]) ?|[\\].)*)',
$m,
false
);
if ($match) {
$word = $m[1];
// handling of escaping in keyword : get the escaped char
if (strpos($word, '\') !== false) {
$send = $this->count;
$escapedWord = [];
$this->seek($s);
$previousEscape = false;
while ($this->count < $send) {
$char = $this->buffer[$this->count];
$this->count++;
if (
$this->count < $send
&& $char === '\'
&& !$previousEscape
&& $this->matchEscapeCharacter($out, true)
) {
$escapedWord[] = $out;
} else {
if ($previousEscape) {
$previousEscape = false;
} elseif ($char === '\') {
$previousEscape = true;
}
$escapedWord[] = $char;
}
}
$word = implode('', $escapedWord);
}
if (is_null($eatWhitespace) ? $this->eatWhiteDefault : $eatWhitespace) {
$this->whitespace();
}
return true;
}
return false;
}
/**
* Parse a keyword that should not start with a number
*
* @param string $word
* @param boolean $eatWhitespace
*
* @return boolean
*/
protected function restrictedKeyword(&$word, $eatWhitespace = null)
{
$s = $this->count;
if ($this->keyword($word, $eatWhitespace) && (ord($word[0]) > 57 || ord($word[0]) < 48)) {
return true;
}
$this->seek($s);
return false;
}
/**
* Parse a placeholder
*
* @param string|array $placeholder
*
* @return boolean
*/
protected function placeholder(&$placeholder)
{
$match = $this->match(
$this->utf8
? '([pLw-_]+)'
: '([w-_]+)',
$m
);
if ($match) {
$placeholder = $m[1];
return true;
}
if ($this->interpolation($placeholder)) {
return true;
}
return false;
}
/**
* Parse a url
*
* @param array $out
*
* @return boolean
*/
protected function url(&$out)
{
if ($this->literal('url(', 4)) {
$s = $this->count;
if (
($this->string($out) || $this->spaceList($out)) &&
$this->matchChar(')')
) {
$out = [Type::T_STRING, '', ['url(', $out, ')']];
return true;
}
$this->seek($s);
if (
$this->openString(')', $out) &&
$this->matchChar(')')
) {
$out = [Type::T_STRING, '', ['url(', $out, ')']];
return true;
}
}
return false;
}
/**
* Consume an end of statement delimiter
* @param bool $eatWhitespace
*
* @return boolean
*/
protected function end($eatWhitespace = null)
{
if ($this->matchChar(';', $eatWhitespace)) {
return true;
}
if ($this->count === strlen($this->buffer) || $this->buffer[$this->count] === '}') {
// if there is end of file or a closing block next then we don't need a ;
return true;
}
return false;
}
/**
* Strip assignment flag from the list
*
* @param array $value
*
* @return array
*/
protected function stripAssignmentFlags(&$value)
{
$flags = [];
for ($token = &$value; $token[0] === Type::T_LIST && ($s = count($token[2])); $token = &$lastNode) {
$lastNode = &$token[2][$s - 1];
while ($lastNode[0] === Type::T_KEYWORD && in_array($lastNode[1], ['!default', '!global'])) {
array_pop($token[2]);
$node = end($token[2]);
$token = $this->flattenList($token);
$flags[] = $lastNode[1];
$lastNode = $node;
}
}
return $flags;
}
/**
* Strip optional flag from selector list
*
* @param array $selectors
*
* @return string
*/
protected function stripOptionalFlag(&$selectors)
{
$optional = false;
$selector = end($selectors);
$part = end($selector);
if ($part === ['!optional']) {
array_pop($selectors[count($selectors) - 1]);
$optional = true;
}
return $optional;
}
/**
* Turn list of length 1 into value type
*
* @param array $value
*
* @return array
*/
protected function flattenList($value)
{
if ($value[0] === Type::T_LIST && count($value[2]) === 1) {
return $this->flattenList($value[2][0]);
}
return $value;
}
/**
* Quote regular expression
*
* @param string $what
*
* @return string
*/
private function pregQuote($what)
{
return preg_quote($what, '/');
}
/**
* Extract line numbers from buffer
*
* @param string $buffer
*/
private function extractLineNumbers($buffer)
{
$this->sourcePositions = [0 => 0];
$prev = 0;
while (($pos = strpos($buffer, "n", $prev)) !== false) {
$this->sourcePositions[] = $pos;
$prev = $pos + 1;
}
$this->sourcePositions[] = strlen($buffer);
if (substr($buffer, -1) !== "n") {
$this->sourcePositions[] = strlen($buffer) + 1;
}
}
/**
* Get source line number and column (given character position in the buffer)
*
* @param integer $pos
*
* @return array
*/
private function getSourcePosition($pos)
{
$low = 0;
$high = count($this->sourcePositions);
while ($low < $high) {
$mid = (int) (($high + $low) / 2);
if ($pos < $this->sourcePositions[$mid]) {
$high = $mid - 1;
continue;
}
if ($pos >= $this->sourcePositions[$mid + 1]) {
$low = $mid + 1;
continue;
}
return [$mid + 1, $pos - $this->sourcePositions[$mid]];
}
return [$low + 1, $pos - $this->sourcePositions[$low]];
}
/**
* Save internal encoding
*/
private function saveEncoding()
{
if (extension_loaded('mbstring')) {
$this->encoding = mb_internal_encoding();
mb_internal_encoding('iso-8859-1');
}
}
/**
* Restore internal encoding
*/
private function restoreEncoding()
{
if (extension_loaded('mbstring') && $this->encoding) {
mb_internal_encoding($this->encoding);
}
}
}