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<?php
/**
* @private
*/
class Less_Exception_Chunk extends Less_Exception_Parser {
protected $parserCurrentIndex = 0;
protected $emitFrom = 0;
protected $input_len;
/**
* @param string $input
* @param Exception|null $previous Previous exception
* @param int|null $index The current parser index
* @param array|null $currentFile The file
* @param int $code The exception code
*/
public function __construct( $input, Exception $previous = null, $index = null, $currentFile = null, $code = 0 ) {
$this->message = 'ParseError: Unexpected input'; // default message
$this->index = $index;
$this->currentFile = $currentFile;
$this->input = $input;
$this->input_len = strlen( $input );
$this->Chunks();
$this->genMessage();
}
/**
* See less.js chunks()
* We don't actually need the chunks
*/
protected function Chunks() {
$level = 0;
$parenLevel = 0;
$lastMultiCommentEndBrace = null;
$lastOpening = null;
$lastMultiComment = null;
$lastParen = null;
for ( $this->parserCurrentIndex = 0; $this->parserCurrentIndex < $this->input_len; $this->parserCurrentIndex++ ) {
$cc = $this->CharCode( $this->parserCurrentIndex );
if ( ( ( $cc >= 97 ) && ( $cc <= 122 ) ) || ( $cc < 34 ) ) {
// a-z or whitespace
continue;
}
switch ( $cc ) {
// (
case 40:
$parenLevel++;
$lastParen = $this->parserCurrentIndex;
break;
// )
case 41:
$parenLevel--;
if ( $parenLevel < 0 ) {
return $this->fail( "missing opening `(`" );
}
break;
// ;
case 59:
// if (!$parenLevel) { $this->emitChunk(); }
break;
// {
case 123:
$level++;
$lastOpening = $this->parserCurrentIndex;
break;
// }
case 125:
$level--;
if ( $level < 0 ) {
return $this->fail( "missing opening `{`" );
}
// if (!$level && !$parenLevel) { $this->emitChunk(); }
break;
// \
case 92:
if ( $this->parserCurrentIndex < $this->input_len - 1 ) {
$this->parserCurrentIndex++;
break;
}
return $this->fail( "unescaped `\\`" );
// ", ' and `
case 34:
case 39:
case 96:
$matched = 0;
$currentChunkStartIndex = $this->parserCurrentIndex;
for ( $this->parserCurrentIndex += 1; $this->parserCurrentIndex < $this->input_len; $this->parserCurrentIndex++ ) {
$cc2 = $this->CharCode( $this->parserCurrentIndex );
if ( $cc2 > 96 ) { continue;
}
if ( $cc2 == $cc ) { $matched = 1;
break;
}
if ( $cc2 == 92 ) { // \
if ( $this->parserCurrentIndex == $this->input_len - 1 ) {
return $this->fail( "unescaped `\\`" );
}
$this->parserCurrentIndex++;
}
}
if ( $matched ) { break;
}
return $this->fail( "unmatched `" . chr( $cc ) . "`", $currentChunkStartIndex );
// /, check for comment
case 47:
if ( $parenLevel || ( $this->parserCurrentIndex == $this->input_len - 1 ) ) { break;
}
$cc2 = $this->CharCode( $this->parserCurrentIndex + 1 );
if ( $cc2 == 47 ) {
// //, find lnfeed
for ( $this->parserCurrentIndex += 2; $this->parserCurrentIndex < $this->input_len; $this->parserCurrentIndex++ ) {
$cc2 = $this->CharCode( $this->parserCurrentIndex );
if ( ( $cc2 <= 13 ) && ( ( $cc2 == 10 ) || ( $cc2 == 13 ) ) ) { break;
}
}
} elseif ( $cc2 == 42 ) {
// /*, find */
$lastMultiComment = $currentChunkStartIndex = $this->parserCurrentIndex;
for ( $this->parserCurrentIndex += 2; $this->parserCurrentIndex < $this->input_len - 1; $this->parserCurrentIndex++ ) {
$cc2 = $this->CharCode( $this->parserCurrentIndex );
if ( $cc2 == 125 ) { $lastMultiCommentEndBrace = $this->parserCurrentIndex;
}
if ( $cc2 != 42 ) { continue;
}
if ( $this->CharCode( $this->parserCurrentIndex + 1 ) == 47 ) { break;
}
}
if ( $this->parserCurrentIndex == $this->input_len - 1 ) {
return $this->fail( "missing closing `*/`", $currentChunkStartIndex );
}
}
break;
// *, check for unmatched */
case 42:
if ( ( $this->parserCurrentIndex < $this->input_len - 1 ) && ( $this->CharCode( $this->parserCurrentIndex + 1 ) == 47 ) ) {
return $this->fail( "unmatched `/*`" );
}
break;
}
}
if ( $level !== 0 ) {
if ( ( $lastMultiComment > $lastOpening ) && ( $lastMultiCommentEndBrace > $lastMultiComment ) ) {
return $this->fail( "missing closing `}` or `*/`", $lastOpening );
} else {
return $this->fail( "missing closing `}`", $lastOpening );
}
} elseif ( $parenLevel !== 0 ) {
return $this->fail( "missing closing `)`", $lastParen );
}
// chunk didn't fail
//$this->emitChunk(true);
}
public function CharCode( $pos ) {
return ord( $this->input[$pos] );
}
public function fail( $msg, $index = null ) {
if ( !$index ) {
$this->index = $this->parserCurrentIndex;
} else {
$this->index = $index;
}
$this->message = 'ParseError: ' . $msg;
}
/*
function emitChunk( $force = false ){
$len = $this->parserCurrentIndex - $this->emitFrom;
if ((($len < 512) && !$force) || !$len) {
return;
}
$chunks[] = substr($this->input, $this->emitFrom, $this->parserCurrentIndex + 1 - $this->emitFrom );
$this->emitFrom = $this->parserCurrentIndex + 1;
}
*/
}
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