mirror of https://github.com/mashirozx/sakura.git
2495 lines
59 KiB
PHP
2495 lines
59 KiB
PHP
<?php
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/**
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* SCSSPHP
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*
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* @copyright 2012-2018 Leaf Corcoran
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*
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* @license http://opensource.org/licenses/MIT MIT
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*
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* @link http://leafo.github.io/scssphp
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*/
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namespace Leafo\ScssPhp;
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use Leafo\ScssPhp\Block;
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use Leafo\ScssPhp\Compiler;
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use Leafo\ScssPhp\Exception\ParserException;
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use Leafo\ScssPhp\Node;
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use Leafo\ScssPhp\Type;
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/**
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* Parser
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*
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* @author Leaf Corcoran <leafot@gmail.com>
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*/
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class Parser
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{
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const SOURCE_INDEX = -1;
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const SOURCE_LINE = -2;
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const SOURCE_COLUMN = -3;
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/**
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* @var array
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*/
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protected static $precedence = [
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'=' => 0,
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'or' => 1,
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'and' => 2,
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'==' => 3,
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'!=' => 3,
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'<=>' => 3,
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'<=' => 4,
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'>=' => 4,
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'<' => 4,
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'>' => 4,
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'+' => 5,
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'-' => 5,
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'*' => 6,
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'/' => 6,
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'%' => 6,
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];
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protected static $commentPattern;
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protected static $operatorPattern;
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protected static $whitePattern;
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private $sourceName;
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private $sourceIndex;
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private $sourcePositions;
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private $charset;
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private $count;
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private $env;
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private $inParens;
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private $eatWhiteDefault;
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private $buffer;
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private $utf8;
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private $encoding;
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private $patternModifiers;
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/**
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* Constructor
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*
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* @api
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*
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* @param string $sourceName
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* @param integer $sourceIndex
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* @param string $encoding
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*/
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public function __construct($sourceName, $sourceIndex = 0, $encoding = 'utf-8')
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{
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$this->sourceName = $sourceName ?: '(stdin)';
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$this->sourceIndex = $sourceIndex;
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$this->charset = null;
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$this->utf8 = ! $encoding || strtolower($encoding) === 'utf-8';
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$this->patternModifiers = $this->utf8 ? 'Aisu' : 'Ais';
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if (empty(static::$operatorPattern)) {
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static::$operatorPattern = '([*\/%+-]|[!=]\=|\>\=?|\<\=\>|\<\=?|and|or)';
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$commentSingle = '\/\/';
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$commentMultiLeft = '\/\*';
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$commentMultiRight = '\*\/';
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static::$commentPattern = $commentMultiLeft . '.*?' . $commentMultiRight;
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static::$whitePattern = $this->utf8
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? '/' . $commentSingle . '[^\n]*\s*|(' . static::$commentPattern . ')\s*|\s+/AisuS'
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: '/' . $commentSingle . '[^\n]*\s*|(' . static::$commentPattern . ')\s*|\s+/AisS';
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}
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}
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/**
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* Get source file name
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*
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* @api
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*
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* @return string
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*/
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public function getSourceName()
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{
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return $this->sourceName;
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}
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/**
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* Throw parser error
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*
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* @api
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*
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* @param string $msg
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*
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* @throws \Leafo\ScssPhp\Exception\ParserException
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*/
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public function throwParseError($msg = 'parse error')
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{
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list($line, /* $column */) = $this->getSourcePosition($this->count);
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$loc = empty($this->sourceName) ? "line: $line" : "$this->sourceName on line $line";
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if ($this->peek("(.*?)(\n|$)", $m, $this->count)) {
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throw new ParserException("$msg: failed at `$m[1]` $loc");
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}
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throw new ParserException("$msg: $loc");
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}
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/**
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* Parser buffer
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*
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* @api
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*
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* @param string $buffer
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*
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* @return \Leafo\ScssPhp\Block
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*/
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public function parse($buffer)
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{
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// strip BOM (byte order marker)
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if (substr($buffer, 0, 3) === "\xef\xbb\xbf") {
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$buffer = substr($buffer, 3);
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}
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$this->buffer = rtrim($buffer, "\x00..\x1f");
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$this->count = 0;
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$this->env = null;
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$this->inParens = false;
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$this->eatWhiteDefault = true;
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$this->saveEncoding();
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$this->extractLineNumbers($buffer);
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$this->pushBlock(null); // root block
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$this->whitespace();
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$this->pushBlock(null);
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$this->popBlock();
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while ($this->parseChunk()) {
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;
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}
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if ($this->count !== strlen($this->buffer)) {
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$this->throwParseError();
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}
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if (! empty($this->env->parent)) {
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$this->throwParseError('unclosed block');
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}
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if ($this->charset) {
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array_unshift($this->env->children, $this->charset);
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}
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$this->env->isRoot = true;
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$this->restoreEncoding();
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return $this->env;
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}
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/**
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* Parse a value or value list
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*
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* @api
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*
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* @param string $buffer
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* @param string $out
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*
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* @return boolean
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*/
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public function parseValue($buffer, &$out)
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{
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$this->count = 0;
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$this->env = null;
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$this->inParens = false;
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$this->eatWhiteDefault = true;
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$this->buffer = (string) $buffer;
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$this->saveEncoding();
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$list = $this->valueList($out);
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$this->restoreEncoding();
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return $list;
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}
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/**
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* Parse a selector or selector list
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*
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* @api
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*
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* @param string $buffer
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* @param string $out
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*
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* @return boolean
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*/
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public function parseSelector($buffer, &$out)
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{
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$this->count = 0;
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$this->env = null;
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$this->inParens = false;
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$this->eatWhiteDefault = true;
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$this->buffer = (string) $buffer;
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$this->saveEncoding();
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$selector = $this->selectors($out);
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$this->restoreEncoding();
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return $selector;
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}
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/**
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* Parse a single chunk off the head of the buffer and append it to the
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* current parse environment.
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*
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* Returns false when the buffer is empty, or when there is an error.
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*
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* This function is called repeatedly until the entire document is
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* parsed.
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*
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* This parser is most similar to a recursive descent parser. Single
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* functions represent discrete grammatical rules for the language, and
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* they are able to capture the text that represents those rules.
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*
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* Consider the function Compiler::keyword(). (All parse functions are
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* structured the same.)
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*
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* The function takes a single reference argument. When calling the
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* function it will attempt to match a keyword on the head of the buffer.
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* If it is successful, it will place the keyword in the referenced
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* argument, advance the position in the buffer, and return true. If it
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* fails then it won't advance the buffer and it will return false.
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*
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* All of these parse functions are powered by Compiler::match(), which behaves
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* the same way, but takes a literal regular expression. Sometimes it is
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* more convenient to use match instead of creating a new function.
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*
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* Because of the format of the functions, to parse an entire string of
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* grammatical rules, you can chain them together using &&.
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*
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* But, if some of the rules in the chain succeed before one fails, then
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* the buffer position will be left at an invalid state. In order to
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* avoid this, Compiler::seek() is used to remember and set buffer positions.
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*
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* Before parsing a chain, use $s = $this->seek() to remember the current
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* position into $s. Then if a chain fails, use $this->seek($s) to
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* go back where we started.
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*
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* @return boolean
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*/
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protected function parseChunk()
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{
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$s = $this->seek();
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// the directives
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if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] === '@') {
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if ($this->literal('@at-root') &&
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($this->selectors($selector) || true) &&
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($this->map($with) || true) &&
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$this->literal('{')
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) {
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$atRoot = $this->pushSpecialBlock(Type::T_AT_ROOT, $s);
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$atRoot->selector = $selector;
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$atRoot->with = $with;
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return true;
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}
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$this->seek($s);
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if ($this->literal('@media') && $this->mediaQueryList($mediaQueryList) && $this->literal('{')) {
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$media = $this->pushSpecialBlock(Type::T_MEDIA, $s);
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$media->queryList = $mediaQueryList[2];
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return true;
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}
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$this->seek($s);
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if ($this->literal('@mixin') &&
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$this->keyword($mixinName) &&
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($this->argumentDef($args) || true) &&
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$this->literal('{')
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) {
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$mixin = $this->pushSpecialBlock(Type::T_MIXIN, $s);
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$mixin->name = $mixinName;
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$mixin->args = $args;
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return true;
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}
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$this->seek($s);
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if ($this->literal('@include') &&
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$this->keyword($mixinName) &&
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($this->literal('(') &&
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($this->argValues($argValues) || true) &&
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$this->literal(')') || true) &&
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($this->end() ||
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$this->literal('{') && $hasBlock = true)
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) {
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$child = [Type::T_INCLUDE, $mixinName, isset($argValues) ? $argValues : null, null];
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if (! empty($hasBlock)) {
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$include = $this->pushSpecialBlock(Type::T_INCLUDE, $s);
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$include->child = $child;
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} else {
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$this->append($child, $s);
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}
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return true;
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}
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$this->seek($s);
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if ($this->literal('@scssphp-import-once') &&
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$this->valueList($importPath) &&
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$this->end()
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) {
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$this->append([Type::T_SCSSPHP_IMPORT_ONCE, $importPath], $s);
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return true;
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}
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$this->seek($s);
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if ($this->literal('@import') &&
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$this->valueList($importPath) &&
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$this->end()
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) {
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$this->append([Type::T_IMPORT, $importPath], $s);
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return true;
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}
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$this->seek($s);
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if ($this->literal('@import') &&
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$this->url($importPath) &&
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$this->end()
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) {
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$this->append([Type::T_IMPORT, $importPath], $s);
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return true;
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}
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$this->seek($s);
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if ($this->literal('@extend') &&
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$this->selectors($selectors) &&
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$this->end()
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) {
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// check for '!flag'
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$optional = $this->stripOptionalFlag($selectors);
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$this->append([Type::T_EXTEND, $selectors, $optional], $s);
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return true;
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}
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$this->seek($s);
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if ($this->literal('@function') &&
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$this->keyword($fnName) &&
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$this->argumentDef($args) &&
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$this->literal('{')
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) {
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$func = $this->pushSpecialBlock(Type::T_FUNCTION, $s);
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$func->name = $fnName;
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$func->args = $args;
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return true;
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}
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$this->seek($s);
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if ($this->literal('@break') && $this->end()) {
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$this->append([Type::T_BREAK], $s);
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return true;
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}
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$this->seek($s);
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if ($this->literal('@continue') && $this->end()) {
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$this->append([Type::T_CONTINUE], $s);
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return true;
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}
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$this->seek($s);
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if ($this->literal('@return') && ($this->valueList($retVal) || true) && $this->end()) {
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$this->append([Type::T_RETURN, isset($retVal) ? $retVal : [Type::T_NULL]], $s);
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return true;
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}
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$this->seek($s);
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if ($this->literal('@each') &&
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$this->genericList($varNames, 'variable', ',', false) &&
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$this->literal('in') &&
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$this->valueList($list) &&
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$this->literal('{')
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) {
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$each = $this->pushSpecialBlock(Type::T_EACH, $s);
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foreach ($varNames[2] as $varName) {
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$each->vars[] = $varName[1];
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}
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$each->list = $list;
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return true;
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}
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$this->seek($s);
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if ($this->literal('@while') &&
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$this->expression($cond) &&
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$this->literal('{')
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) {
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$while = $this->pushSpecialBlock(Type::T_WHILE, $s);
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$while->cond = $cond;
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return true;
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}
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$this->seek($s);
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if ($this->literal('@for') &&
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$this->variable($varName) &&
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$this->literal('from') &&
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$this->expression($start) &&
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($this->literal('through') ||
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($forUntil = true && $this->literal('to'))) &&
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$this->expression($end) &&
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$this->literal('{')
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) {
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$for = $this->pushSpecialBlock(Type::T_FOR, $s);
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$for->var = $varName[1];
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$for->start = $start;
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$for->end = $end;
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$for->until = isset($forUntil);
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return true;
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}
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$this->seek($s);
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if ($this->literal('@if') && $this->valueList($cond) && $this->literal('{')) {
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$if = $this->pushSpecialBlock(Type::T_IF, $s);
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$if->cond = $cond;
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$if->cases = [];
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return true;
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}
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$this->seek($s);
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if ($this->literal('@debug') &&
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$this->valueList($value) &&
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$this->end()
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) {
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$this->append([Type::T_DEBUG, $value], $s);
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return true;
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}
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|
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$this->seek($s);
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if ($this->literal('@warn') &&
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$this->valueList($value) &&
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$this->end()
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) {
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$this->append([Type::T_WARN, $value], $s);
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return true;
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}
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|
|
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$this->seek($s);
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|
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if ($this->literal('@error') &&
|
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$this->valueList($value) &&
|
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$this->end()
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) {
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$this->append([Type::T_ERROR, $value], $s);
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return true;
|
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}
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|
|
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$this->seek($s);
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|
|
|
if ($this->literal('@content') && $this->end()) {
|
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$this->append([Type::T_MIXIN_CONTENT], $s);
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return true;
|
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}
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|
|
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$this->seek($s);
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$last = $this->last();
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if (isset($last) && $last[0] === Type::T_IF) {
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list(, $if) = $last;
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if ($this->literal('@else')) {
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if ($this->literal('{')) {
|
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$else = $this->pushSpecialBlock(Type::T_ELSE, $s);
|
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} elseif ($this->literal('if') && $this->valueList($cond) && $this->literal('{')) {
|
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$else = $this->pushSpecialBlock(Type::T_ELSEIF, $s);
|
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$else->cond = $cond;
|
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}
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if (isset($else)) {
|
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$else->dontAppend = true;
|
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$if->cases[] = $else;
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return true;
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}
|
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}
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|
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$this->seek($s);
|
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}
|
|
|
|
// only retain the first @charset directive encountered
|
|
if ($this->literal('@charset') &&
|
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$this->valueList($charset) &&
|
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$this->end()
|
|
) {
|
|
if (! isset($this->charset)) {
|
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$statement = [Type::T_CHARSET, $charset];
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|
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list($line, $column) = $this->getSourcePosition($s);
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|
|
$statement[static::SOURCE_LINE] = $line;
|
|
$statement[static::SOURCE_COLUMN] = $column;
|
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$statement[static::SOURCE_INDEX] = $this->sourceIndex;
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|
|
$this->charset = $statement;
|
|
}
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return true;
|
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}
|
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|
|
$this->seek($s);
|
|
|
|
// doesn't match built in directive, do generic one
|
|
if ($this->literal('@', false) &&
|
|
$this->keyword($dirName) &&
|
|
($this->variable($dirValue) || $this->openString('{', $dirValue) || true) &&
|
|
$this->literal('{')
|
|
) {
|
|
if ($dirName === 'media') {
|
|
$directive = $this->pushSpecialBlock(Type::T_MEDIA, $s);
|
|
} else {
|
|
$directive = $this->pushSpecialBlock(Type::T_DIRECTIVE, $s);
|
|
$directive->name = $dirName;
|
|
}
|
|
|
|
if (isset($dirValue)) {
|
|
$directive->value = $dirValue;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
// property shortcut
|
|
// captures most properties before having to parse a selector
|
|
if ($this->keyword($name, false) &&
|
|
$this->literal(': ') &&
|
|
$this->valueList($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->literal(':') &&
|
|
$this->valueList($value) &&
|
|
$this->end()
|
|
) {
|
|
// check for '!flag'
|
|
$assignmentFlags = $this->stripAssignmentFlags($value);
|
|
$this->append([Type::T_ASSIGN, $name, $value, $assignmentFlags], $s);
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
// misc
|
|
if ($this->literal('-->')) {
|
|
return true;
|
|
}
|
|
|
|
// opening css block
|
|
if ($this->selectors($selectors) && $this->literal('{')) {
|
|
$this->pushBlock($selectors, $s);
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
// property assign, or nested assign
|
|
if ($this->propertyName($name) && $this->literal(':')) {
|
|
$foundSomething = false;
|
|
|
|
if ($this->valueList($value)) {
|
|
$this->append([Type::T_ASSIGN, $name, $value], $s);
|
|
$foundSomething = true;
|
|
}
|
|
|
|
if ($this->literal('{')) {
|
|
$propBlock = $this->pushSpecialBlock(Type::T_NESTED_PROPERTY, $s);
|
|
$propBlock->prefix = $name;
|
|
$foundSomething = true;
|
|
} elseif ($foundSomething) {
|
|
$foundSomething = $this->end();
|
|
}
|
|
|
|
if ($foundSomething) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
// closing a block
|
|
if ($this->literal('}')) {
|
|
$block = $this->popBlock();
|
|
|
|
if (isset($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], $s);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// extra stuff
|
|
if ($this->literal(';') ||
|
|
$this->literal('<!--')
|
|
) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Push block onto parse tree
|
|
*
|
|
* @param array $selectors
|
|
* @param integer $pos
|
|
*
|
|
* @return \Leafo\ScssPhp\Block
|
|
*/
|
|
protected function pushBlock($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;
|
|
|
|
return $b;
|
|
}
|
|
|
|
/**
|
|
* Push special (named) block onto parse tree
|
|
*
|
|
* @param string $type
|
|
* @param integer $pos
|
|
*
|
|
* @return \Leafo\ScssPhp\Block
|
|
*/
|
|
protected function pushSpecialBlock($type, $pos)
|
|
{
|
|
$block = $this->pushBlock(null, $pos);
|
|
$block->type = $type;
|
|
|
|
return $block;
|
|
}
|
|
|
|
/**
|
|
* Pop scope and return last block
|
|
*
|
|
* @return \Leafo\ScssPhp\Block
|
|
*
|
|
* @throws \Exception
|
|
*/
|
|
protected function popBlock()
|
|
{
|
|
$block = $this->env;
|
|
|
|
if (empty($block->parent)) {
|
|
$this->throwParseError('unexpected }');
|
|
}
|
|
|
|
$this->env = $block->parent;
|
|
unset($block->parent);
|
|
|
|
$comments = $block->comments;
|
|
if (count($comments)) {
|
|
$this->env->comments = $comments;
|
|
unset($block->comments);
|
|
}
|
|
|
|
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 $where
|
|
*
|
|
* @return integer
|
|
*/
|
|
protected function seek($where = null)
|
|
{
|
|
if ($where === null) {
|
|
return $this->count;
|
|
}
|
|
|
|
$this->count = $where;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* 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 $delim Delimeter
|
|
*
|
|
* @return boolean True if match; false otherwise
|
|
*/
|
|
protected function matchString(&$m, $delim)
|
|
{
|
|
$token = null;
|
|
|
|
$end = strlen($this->buffer);
|
|
|
|
// look for either ending delim, escape, or string interpolation
|
|
foreach (['#{', '\\', $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, $eatWhitespace = null)
|
|
{
|
|
if (! isset($eatWhitespace)) {
|
|
$eatWhitespace = $this->eatWhiteDefault;
|
|
}
|
|
|
|
$r = '/' . $regex . '/' . $this->patternModifiers;
|
|
|
|
if (preg_match($r, $this->buffer, $out, null, $this->count)) {
|
|
$this->count += strlen($out[0]);
|
|
|
|
if ($eatWhitespace) {
|
|
$this->whitespace();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Match literal string
|
|
*
|
|
* @param string $what
|
|
* @param boolean $eatWhitespace
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function literal($what, $eatWhitespace = null)
|
|
{
|
|
if (! isset($eatWhitespace)) {
|
|
$eatWhitespace = $this->eatWhiteDefault;
|
|
}
|
|
|
|
$len = strlen($what);
|
|
|
|
if (strcasecmp(substr($this->buffer, $this->count, $len), $what) === 0) {
|
|
$this->count += $len;
|
|
|
|
if ($eatWhitespace) {
|
|
$this->whitespace();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* 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])) {
|
|
$this->appendComment([Type::T_COMMENT, $m[1]]);
|
|
|
|
$this->commentsSeen[$this->count] = true;
|
|
}
|
|
|
|
$this->count += strlen($m[0]);
|
|
$gotWhite = true;
|
|
}
|
|
|
|
return $gotWhite;
|
|
}
|
|
|
|
/**
|
|
* Append comment to current block
|
|
*
|
|
* @param array $comment
|
|
*/
|
|
protected function appendComment($comment)
|
|
{
|
|
$comment[1] = substr(preg_replace(['/^\s+/m', '/^(.)/m'], ['', ' \1'], $comment[1]), 1);
|
|
|
|
$this->env->comments[] = $comment;
|
|
}
|
|
|
|
/**
|
|
* Append statement to current block
|
|
*
|
|
* @param array $statement
|
|
* @param integer $pos
|
|
*/
|
|
protected function append($statement, $pos = null)
|
|
{
|
|
if ($pos !== null) {
|
|
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 = $this->env->comments;
|
|
|
|
if (count($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') && ($only = true) || $this->literal('not') && ($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')) {
|
|
$this->genericList($expressions, 'mediaExpression', 'and', false);
|
|
|
|
if (is_array($expressions)) {
|
|
$parts = array_merge($parts, $expressions[2]);
|
|
}
|
|
}
|
|
|
|
$out = $parts;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Parse media expression
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function mediaExpression(&$out)
|
|
{
|
|
$s = $this->seek();
|
|
$value = null;
|
|
|
|
if ($this->literal('(') &&
|
|
$this->expression($feature) &&
|
|
($this->literal(':') && $this->expression($value) || true) &&
|
|
$this->literal(')')
|
|
) {
|
|
$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)
|
|
{
|
|
if ($this->genericList($list, 'argValue', ',', false)) {
|
|
$out = $list[2];
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Parse argument value
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function argValue(&$out)
|
|
{
|
|
$s = $this->seek();
|
|
|
|
$keyword = null;
|
|
|
|
if (! $this->variable($keyword) || ! $this->literal(':')) {
|
|
$this->seek($s);
|
|
$keyword = null;
|
|
}
|
|
|
|
if ($this->genericList($value, 'expression')) {
|
|
$out = [$keyword, $value, false];
|
|
$s = $this->seek();
|
|
|
|
if ($this->literal('...')) {
|
|
$out[2] = true;
|
|
} else {
|
|
$this->seek($s);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Parse comma separated value list
|
|
*
|
|
* @param string $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function valueList(&$out)
|
|
{
|
|
return $this->genericList($out, 'spaceList', ',');
|
|
}
|
|
|
|
/**
|
|
* 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 callable $parseItem
|
|
* @param string $delim
|
|
* @param boolean $flatten
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function genericList(&$out, $parseItem, $delim = '', $flatten = true)
|
|
{
|
|
$s = $this->seek();
|
|
$items = [];
|
|
|
|
while ($this->$parseItem($value)) {
|
|
$items[] = $value;
|
|
|
|
if ($delim) {
|
|
if (! $this->literal($delim)) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (count($items) === 0) {
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
if ($flatten && count($items) === 1) {
|
|
$out = $items[0];
|
|
} else {
|
|
$out = [Type::T_LIST, $delim, $items];
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Parse expression
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function expression(&$out)
|
|
{
|
|
$s = $this->seek();
|
|
|
|
if ($this->literal('(')) {
|
|
if ($this->literal(')')) {
|
|
$out = [Type::T_LIST, '', []];
|
|
|
|
return true;
|
|
}
|
|
|
|
if ($this->valueList($out) && $this->literal(')') && $out[0] === Type::T_LIST) {
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
if ($this->map($out)) {
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
}
|
|
|
|
if ($this->value($lhs)) {
|
|
$out = $this->expHelper($lhs, 0);
|
|
|
|
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->seek();
|
|
$whiteBefore = isset($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)) {
|
|
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->seek();
|
|
$whiteBefore = isset($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)
|
|
{
|
|
$s = $this->seek();
|
|
|
|
if ($this->literal('not', false) && $this->whitespace() && $this->value($inner)) {
|
|
$out = [Type::T_UNARY, 'not', $inner, $this->inParens];
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
if ($this->literal('not', false) && $this->parenValue($inner)) {
|
|
$out = [Type::T_UNARY, 'not', $inner, $this->inParens];
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
if ($this->literal('+') && $this->value($inner)) {
|
|
$out = [Type::T_UNARY, '+', $inner, $this->inParens];
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
// negation
|
|
if ($this->literal('-', false) &&
|
|
($this->variable($inner) ||
|
|
$this->unit($inner) ||
|
|
$this->parenValue($inner))
|
|
) {
|
|
$out = [Type::T_UNARY, '-', $inner, $this->inParens];
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
if ($this->parenValue($out) ||
|
|
$this->interpolation($out) ||
|
|
$this->variable($out) ||
|
|
$this->color($out) ||
|
|
$this->unit($out) ||
|
|
$this->string($out) ||
|
|
$this->func($out) ||
|
|
$this->progid($out)
|
|
) {
|
|
return true;
|
|
}
|
|
|
|
if ($this->keyword($keyword)) {
|
|
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->seek();
|
|
|
|
$inParens = $this->inParens;
|
|
|
|
if ($this->literal('(')) {
|
|
if ($this->literal(')')) {
|
|
$out = [Type::T_LIST, '', []];
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->inParens = true;
|
|
|
|
if ($this->expression($exp) && $this->literal(')')) {
|
|
$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 = $this->seek();
|
|
|
|
if ($this->literal('progid:', false) &&
|
|
$this->openString('(', $fn) &&
|
|
$this->literal('(')
|
|
) {
|
|
$this->openString(')', $args, '(');
|
|
|
|
if ($this->literal(')')) {
|
|
$out = [Type::T_STRING, '', [
|
|
'progid:', $fn, '(', $args, ')'
|
|
]];
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Parse function call
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function func(&$func)
|
|
{
|
|
$s = $this->seek();
|
|
|
|
if ($this->keyword($name, false) &&
|
|
$this->literal('(')
|
|
) {
|
|
if ($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 = $this->seek();
|
|
|
|
if ($this->argValues($args) && $this->literal(')')) {
|
|
$func = [Type::T_FUNCTION_CALL, $name, $args];
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($ss);
|
|
}
|
|
|
|
if (($this->openString(')', $str, '(') || true) &&
|
|
$this->literal(')')
|
|
) {
|
|
$args = [];
|
|
|
|
if (! empty($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->seek();
|
|
$this->literal('(');
|
|
|
|
$args = [];
|
|
|
|
while ($this->keyword($var)) {
|
|
if ($this->literal('=') && $this->expression($exp)) {
|
|
$args[] = [Type::T_STRING, '', [$var . '=']];
|
|
$arg = $exp;
|
|
} else {
|
|
break;
|
|
}
|
|
|
|
$args[] = $arg;
|
|
|
|
if (! $this->literal(',')) {
|
|
break;
|
|
}
|
|
|
|
$args[] = [Type::T_STRING, '', [', ']];
|
|
}
|
|
|
|
if (! $this->literal(')') || ! count($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->seek();
|
|
$this->literal('(');
|
|
|
|
$args = [];
|
|
|
|
while ($this->variable($var)) {
|
|
$arg = [$var[1], null, false];
|
|
|
|
$ss = $this->seek();
|
|
|
|
if ($this->literal(':') && $this->genericList($defaultVal, 'expression')) {
|
|
$arg[1] = $defaultVal;
|
|
} else {
|
|
$this->seek($ss);
|
|
}
|
|
|
|
$ss = $this->seek();
|
|
|
|
if ($this->literal('...')) {
|
|
$sss = $this->seek();
|
|
|
|
if (! $this->literal(')')) {
|
|
$this->throwParseError('... has to be after the final argument');
|
|
}
|
|
|
|
$arg[2] = true;
|
|
$this->seek($sss);
|
|
} else {
|
|
$this->seek($ss);
|
|
}
|
|
|
|
$args[] = $arg;
|
|
|
|
if (! $this->literal(',')) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (! $this->literal(')')) {
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
$out = $args;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Parse map
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function map(&$out)
|
|
{
|
|
$s = $this->seek();
|
|
|
|
if (! $this->literal('(')) {
|
|
return false;
|
|
}
|
|
|
|
$keys = [];
|
|
$values = [];
|
|
|
|
while ($this->genericList($key, 'expression') && $this->literal(':') &&
|
|
$this->genericList($value, 'expression')
|
|
) {
|
|
$keys[] = $key;
|
|
$values[] = $value;
|
|
|
|
if (! $this->literal(',')) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (! count($keys) || ! $this->literal(')')) {
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
$out = [Type::T_MAP, $keys, $values];
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Parse color
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function color(&$out)
|
|
{
|
|
$color = [Type::T_COLOR];
|
|
|
|
if ($this->match('(#([0-9a-f]{6})|#([0-9a-f]{3}))', $m)) {
|
|
if (isset($m[3])) {
|
|
$num = hexdec($m[3]);
|
|
|
|
foreach ([3, 2, 1] as $i) {
|
|
$t = $num & 0xf;
|
|
$color[$i] = $t << 4 | $t;
|
|
$num >>= 4;
|
|
}
|
|
} else {
|
|
$num = hexdec($m[2]);
|
|
|
|
foreach ([3, 2, 1] as $i) {
|
|
$color[$i] = $num & 0xff;
|
|
$num >>= 8;
|
|
}
|
|
}
|
|
|
|
$out = $color;
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Parse number with unit
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function unit(&$unit)
|
|
{
|
|
if ($this->match('([0-9]*(\.)?[0-9]+)([%a-zA-Z]+)?', $m)) {
|
|
$unit = new Node\Number($m[1], empty($m[3]) ? '' : $m[3]);
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Parse string
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function string(&$out)
|
|
{
|
|
$s = $this->seek();
|
|
|
|
if ($this->literal('"', false)) {
|
|
$delim = '"';
|
|
} elseif ($this->literal("'", 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] === '\\') {
|
|
if ($this->literal('"', false)) {
|
|
$content[] = $m[2] . '"';
|
|
} elseif ($this->literal("'", false)) {
|
|
$content[] = $m[2] . "'";
|
|
} else {
|
|
$content[] = $m[2];
|
|
}
|
|
} else {
|
|
$this->count -= strlen($delim);
|
|
break; // delim
|
|
}
|
|
}
|
|
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
|
|
if ($this->literal($delim)) {
|
|
if ($hasInterpolation) {
|
|
$delim = '"';
|
|
|
|
foreach ($content as &$string) {
|
|
if ($string === "\\'") {
|
|
$string = "'";
|
|
} elseif ($string === '\\"') {
|
|
$string = '"';
|
|
}
|
|
}
|
|
}
|
|
|
|
$out = [Type::T_STRING, $delim, $content];
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Parse keyword or interpolation
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function mixedKeyword(&$out)
|
|
{
|
|
$parts = [];
|
|
|
|
$oldWhite = $this->eatWhiteDefault;
|
|
$this->eatWhiteDefault = false;
|
|
|
|
for (;;) {
|
|
if ($this->keyword($key)) {
|
|
$parts[] = $key;
|
|
continue;
|
|
}
|
|
|
|
if ($this->interpolation($inter)) {
|
|
$parts[] = $inter;
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
|
|
if (count($parts) === 0) {
|
|
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 $nestingOpen
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function openString($end, &$out, $nestingOpen = null)
|
|
{
|
|
$oldWhite = $this->eatWhiteDefault;
|
|
$this->eatWhiteDefault = false;
|
|
|
|
$patt = '(.*?)([\'"]|#\{|' . $this->pregQuote($end) . '|' . static::$commentPattern . ')';
|
|
|
|
$nestingLevel = 0;
|
|
|
|
$content = [];
|
|
|
|
while ($this->match($patt, $m, false)) {
|
|
if (isset($m[1]) && $m[1] !== '') {
|
|
$content[] = $m[1];
|
|
|
|
if ($nestingOpen) {
|
|
$nestingLevel += substr_count($m[1], $nestingOpen);
|
|
}
|
|
}
|
|
|
|
$tok = $m[2];
|
|
|
|
$this->count-= strlen($tok);
|
|
|
|
if ($tok === $end && ! $nestingLevel--) {
|
|
break;
|
|
}
|
|
|
|
if (($tok === "'" || $tok === '"') && $this->string($str)) {
|
|
$content[] = $str;
|
|
continue;
|
|
}
|
|
|
|
if ($tok === '#{' && $this->interpolation($inter)) {
|
|
$content[] = $inter;
|
|
continue;
|
|
}
|
|
|
|
$content[] = $tok;
|
|
$this->count+= strlen($tok);
|
|
}
|
|
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
|
|
if (count($content) === 0) {
|
|
return false;
|
|
}
|
|
|
|
// trim the end
|
|
if (is_string(end($content))) {
|
|
$content[count($content) - 1] = rtrim(end($content));
|
|
}
|
|
|
|
$out = [Type::T_STRING, '', $content];
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Parser interpolation
|
|
*
|
|
* @param array $out
|
|
* @param boolean $lookWhite save information about whitespace before and after
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function interpolation(&$out, $lookWhite = true)
|
|
{
|
|
$oldWhite = $this->eatWhiteDefault;
|
|
$this->eatWhiteDefault = true;
|
|
|
|
$s = $this->seek();
|
|
|
|
if ($this->literal('#{') && $this->valueList($value) && $this->literal('}', false)) {
|
|
if ($lookWhite) {
|
|
$left = preg_match('/\s/', $this->buffer[$s - 1]) ? ' ' : '';
|
|
$right = preg_match('/\s/', $this->buffer[$this->count]) ? ' ': '';
|
|
} else {
|
|
$left = $right = false;
|
|
}
|
|
|
|
$out = [Type::T_INTERPOLATE, $value, $left, $right];
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
|
|
if ($this->eatWhiteDefault) {
|
|
$this->whitespace();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
|
|
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[] = $text;
|
|
continue;
|
|
}
|
|
|
|
if (count($parts) === 0 && $this->match('[:.#]', $m, false)) {
|
|
// css hacks
|
|
$parts[] = $m[0];
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
|
|
if (count($parts) === 0) {
|
|
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 comma separated selector list
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function selectors(&$out)
|
|
{
|
|
$s = $this->seek();
|
|
$selectors = [];
|
|
|
|
while ($this->selector($sel)) {
|
|
$selectors[] = $sel;
|
|
|
|
if (! $this->literal(',')) {
|
|
break;
|
|
}
|
|
|
|
while ($this->literal(',')) {
|
|
; // ignore extra
|
|
}
|
|
}
|
|
|
|
if (count($selectors) === 0) {
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
$out = $selectors;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Parse whitespace separated selector list
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function selector(&$out)
|
|
{
|
|
$selector = [];
|
|
|
|
for (;;) {
|
|
if ($this->match('[>+~]+', $m)) {
|
|
$selector[] = [$m[0]];
|
|
continue;
|
|
}
|
|
|
|
if ($this->selectorSingle($part)) {
|
|
$selector[] = $part;
|
|
$this->match('\s+', $m);
|
|
continue;
|
|
}
|
|
|
|
if ($this->match('\/[^\/]+\/', $m)) {
|
|
$selector[] = [$m[0]];
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
if (count($selector) === 0) {
|
|
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 $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function selectorSingle(&$out)
|
|
{
|
|
$oldWhite = $this->eatWhiteDefault;
|
|
$this->eatWhiteDefault = false;
|
|
|
|
$parts = [];
|
|
|
|
if ($this->literal('*', false)) {
|
|
$parts[] = '*';
|
|
}
|
|
|
|
for (;;) {
|
|
// see if we can stop early
|
|
if ($this->match('\s*[{,]', $m)) {
|
|
$this->count--;
|
|
break;
|
|
}
|
|
|
|
$s = $this->seek();
|
|
|
|
// self
|
|
if ($this->literal('&', false)) {
|
|
$parts[] = Compiler::$selfSelector;
|
|
continue;
|
|
}
|
|
|
|
if ($this->literal('.', false)) {
|
|
$parts[] = '.';
|
|
continue;
|
|
}
|
|
|
|
if ($this->literal('|', false)) {
|
|
$parts[] = '|';
|
|
continue;
|
|
}
|
|
|
|
if ($this->match('\\\\\S', $m)) {
|
|
$parts[] = $m[0];
|
|
continue;
|
|
}
|
|
|
|
// for keyframes
|
|
if ($this->unit($unit)) {
|
|
$parts[] = $unit;
|
|
continue;
|
|
}
|
|
|
|
if ($this->keyword($name)) {
|
|
$parts[] = $name;
|
|
continue;
|
|
}
|
|
|
|
if ($this->interpolation($inter)) {
|
|
$parts[] = $inter;
|
|
continue;
|
|
}
|
|
|
|
if ($this->literal('%', false) && $this->placeholder($placeholder)) {
|
|
$parts[] = '%';
|
|
$parts[] = $placeholder;
|
|
continue;
|
|
}
|
|
|
|
if ($this->literal('#', false)) {
|
|
$parts[] = '#';
|
|
continue;
|
|
}
|
|
|
|
// a pseudo selector
|
|
if ($this->match('::?', $m) && $this->mixedKeyword($nameParts)) {
|
|
$parts[] = $m[0];
|
|
|
|
foreach ($nameParts as $sub) {
|
|
$parts[] = $sub;
|
|
}
|
|
|
|
$ss = $this->seek();
|
|
|
|
if ($this->literal('(') &&
|
|
($this->openString(')', $str, '(') || true) &&
|
|
$this->literal(')')
|
|
) {
|
|
$parts[] = '(';
|
|
|
|
if (! empty($str)) {
|
|
$parts[] = $str;
|
|
}
|
|
|
|
$parts[] = ')';
|
|
} else {
|
|
$this->seek($ss);
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
// attribute selector
|
|
if ($this->literal('[') &&
|
|
($this->openString(']', $str, '[') || true) &&
|
|
$this->literal(']')
|
|
) {
|
|
$parts[] = '[';
|
|
|
|
if (! empty($str)) {
|
|
$parts[] = $str;
|
|
}
|
|
|
|
$parts[] = ']';
|
|
|
|
continue;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
break;
|
|
}
|
|
|
|
$this->eatWhiteDefault = $oldWhite;
|
|
|
|
if (count($parts) === 0) {
|
|
return false;
|
|
}
|
|
|
|
$out = $parts;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Parse a variable
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function variable(&$out)
|
|
{
|
|
$s = $this->seek();
|
|
|
|
if ($this->literal('$', false) && $this->keyword($name)) {
|
|
$out = [Type::T_VARIABLE, $name];
|
|
|
|
return true;
|
|
}
|
|
|
|
$this->seek($s);
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Parse a keyword
|
|
*
|
|
* @param string $word
|
|
* @param boolean $eatWhitespace
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function keyword(&$word, $eatWhitespace = null)
|
|
{
|
|
if ($this->match(
|
|
$this->utf8
|
|
? '(([\pL\w_\-\*!"\']|[\\\\].)([\pL\w\-_"\']|[\\\\].)*)'
|
|
: '(([\w_\-\*!"\']|[\\\\].)([\w\-_"\']|[\\\\].)*)',
|
|
$m,
|
|
$eatWhitespace
|
|
)) {
|
|
$word = $m[1];
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Parse a placeholder
|
|
*
|
|
* @param string $placeholder
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function placeholder(&$placeholder)
|
|
{
|
|
if ($this->match(
|
|
$this->utf8
|
|
? '([\pL\w\-_]+|#[{][$][\pL\w\-_]+[}])'
|
|
: '([\w\-_]+|#[{][$][\w\-_]+[}])',
|
|
$m
|
|
)) {
|
|
$placeholder = $m[1];
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Parse a url
|
|
*
|
|
* @param array $out
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function url(&$out)
|
|
{
|
|
if ($this->match('(url\(\s*(["\']?)([^)]+)\2\s*\))', $m)) {
|
|
$out = [Type::T_STRING, '', ['url(' . $m[2] . $m[3] . $m[2] . ')']];
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Consume an end of statement delimiter
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function end()
|
|
{
|
|
if ($this->literal(';')) {
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* @deprecated
|
|
*
|
|
* {@internal
|
|
* advance counter to next occurrence of $what
|
|
* $until - don't include $what in advance
|
|
* $allowNewline, if string, will be used as valid char set
|
|
* }}
|
|
*/
|
|
protected function to($what, &$out, $until = false, $allowNewline = false)
|
|
{
|
|
if (is_string($allowNewline)) {
|
|
$validChars = $allowNewline;
|
|
} else {
|
|
$validChars = $allowNewline ? '.' : "[^\n]";
|
|
}
|
|
|
|
if (! $this->match('(' . $validChars . '*?)' . $this->pregQuote($what), $m, ! $until)) {
|
|
return false;
|
|
}
|
|
|
|
if ($until) {
|
|
$this->count -= strlen($what); // give back $what
|
|
}
|
|
|
|
$out = $m[1];
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @deprecated
|
|
*/
|
|
protected function show()
|
|
{
|
|
if ($this->peek("(.*?)(\n|$)", $m, $this->count)) {
|
|
return $m[1];
|
|
}
|
|
|
|
return '';
|
|
}
|
|
|
|
/**
|
|
* 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 $pos
|
|
*
|
|
* @return integer
|
|
*/
|
|
private function getSourcePosition($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 (version_compare(PHP_VERSION, '7.2.0') >= 0) {
|
|
return;
|
|
}
|
|
|
|
$iniDirective = 'mbstring' . '.func_overload'; // deprecated in PHP 7.2
|
|
|
|
if (ini_get($iniDirective) & 2) {
|
|
$this->encoding = mb_internal_encoding();
|
|
|
|
mb_internal_encoding('iso-8859-1');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Restore internal encoding
|
|
*/
|
|
private function restoreEncoding()
|
|
{
|
|
if ($this->encoding) {
|
|
mb_internal_encoding($this->encoding);
|
|
}
|
|
}
|
|
}
|