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JS.php
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<?php
/**
* Tokenizes JS code.
*
* @author Greg Sherwood <gsherwood@squiz.net>
* @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
* @license https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
*/
namespace PHP_CodeSniffer\Tokenizers;
use PHP_CodeSniffer\Config;
use PHP_CodeSniffer\Exceptions\TokenizerException;
use PHP_CodeSniffer\Util;
class JS extends Tokenizer
{
/**
* A list of tokens that are allowed to open a scope.
*
* This array also contains information about what kind of token the scope
* opener uses to open and close the scope, if the token strictly requires
* an opener, if the token can share a scope closer, and who it can be shared
* with. An example of a token that shares a scope closer is a CASE scope.
*
* @var array
*/
public $scopeOpeners = [
T_IF => [
'start' => [T_OPEN_CURLY_BRACKET => T_OPEN_CURLY_BRACKET],
'end' => [T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET],
'strict' => false,
'shared' => false,
'with' => [],
],
T_TRY => [
'start' => [T_OPEN_CURLY_BRACKET => T_OPEN_CURLY_BRACKET],
'end' => [T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET],
'strict' => true,
'shared' => false,
'with' => [],
],
T_CATCH => [
'start' => [T_OPEN_CURLY_BRACKET => T_OPEN_CURLY_BRACKET],
'end' => [T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET],
'strict' => true,
'shared' => false,
'with' => [],
],
T_ELSE => [
'start' => [T_OPEN_CURLY_BRACKET => T_OPEN_CURLY_BRACKET],
'end' => [T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET],
'strict' => false,
'shared' => false,
'with' => [],
],
T_FOR => [
'start' => [T_OPEN_CURLY_BRACKET => T_OPEN_CURLY_BRACKET],
'end' => [T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET],
'strict' => false,
'shared' => false,
'with' => [],
],
T_CLASS => [
'start' => [T_OPEN_CURLY_BRACKET => T_OPEN_CURLY_BRACKET],
'end' => [T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET],
'strict' => true,
'shared' => false,
'with' => [],
],
T_FUNCTION => [
'start' => [T_OPEN_CURLY_BRACKET => T_OPEN_CURLY_BRACKET],
'end' => [T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET],
'strict' => false,
'shared' => false,
'with' => [],
],
T_WHILE => [
'start' => [T_OPEN_CURLY_BRACKET => T_OPEN_CURLY_BRACKET],
'end' => [T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET],
'strict' => false,
'shared' => false,
'with' => [],
],
T_DO => [
'start' => [T_OPEN_CURLY_BRACKET => T_OPEN_CURLY_BRACKET],
'end' => [T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET],
'strict' => true,
'shared' => false,
'with' => [],
],
T_SWITCH => [
'start' => [T_OPEN_CURLY_BRACKET => T_OPEN_CURLY_BRACKET],
'end' => [T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET],
'strict' => true,
'shared' => false,
'with' => [],
],
T_CASE => [
'start' => [T_COLON => T_COLON],
'end' => [
T_BREAK => T_BREAK,
T_RETURN => T_RETURN,
T_CONTINUE => T_CONTINUE,
T_THROW => T_THROW,
],
'strict' => true,
'shared' => true,
'with' => [
T_DEFAULT => T_DEFAULT,
T_CASE => T_CASE,
T_SWITCH => T_SWITCH,
],
],
T_DEFAULT => [
'start' => [T_COLON => T_COLON],
'end' => [
T_BREAK => T_BREAK,
T_RETURN => T_RETURN,
T_CONTINUE => T_CONTINUE,
T_THROW => T_THROW,
],
'strict' => true,
'shared' => true,
'with' => [
T_CASE => T_CASE,
T_SWITCH => T_SWITCH,
],
],
];
/**
* A list of tokens that end the scope.
*
* This array is just a unique collection of the end tokens
* from the _scopeOpeners array. The data is duplicated here to
* save time during parsing of the file.
*
* @var array
*/
public $endScopeTokens = [
T_CLOSE_CURLY_BRACKET => T_CLOSE_CURLY_BRACKET,
T_BREAK => T_BREAK,
];
/**
* A list of special JS tokens and their types.
*
* @var array
*/
protected $tokenValues = [
'class' => 'T_CLASS',
'function' => 'T_FUNCTION',
'prototype' => 'T_PROTOTYPE',
'try' => 'T_TRY',
'catch' => 'T_CATCH',
'return' => 'T_RETURN',
'throw' => 'T_THROW',
'break' => 'T_BREAK',
'switch' => 'T_SWITCH',
'continue' => 'T_CONTINUE',
'if' => 'T_IF',
'else' => 'T_ELSE',
'do' => 'T_DO',
'while' => 'T_WHILE',
'for' => 'T_FOR',
'var' => 'T_VAR',
'case' => 'T_CASE',
'default' => 'T_DEFAULT',
'true' => 'T_TRUE',
'false' => 'T_FALSE',
'null' => 'T_NULL',
'this' => 'T_THIS',
'typeof' => 'T_TYPEOF',
'(' => 'T_OPEN_PARENTHESIS',
')' => 'T_CLOSE_PARENTHESIS',
'{' => 'T_OPEN_CURLY_BRACKET',
'}' => 'T_CLOSE_CURLY_BRACKET',
'[' => 'T_OPEN_SQUARE_BRACKET',
']' => 'T_CLOSE_SQUARE_BRACKET',
'?' => 'T_INLINE_THEN',
'.' => 'T_OBJECT_OPERATOR',
'+' => 'T_PLUS',
'-' => 'T_MINUS',
'*' => 'T_MULTIPLY',
'%' => 'T_MODULUS',
'/' => 'T_DIVIDE',
'^' => 'T_LOGICAL_XOR',
',' => 'T_COMMA',
';' => 'T_SEMICOLON',
':' => 'T_COLON',
'<' => 'T_LESS_THAN',
'>' => 'T_GREATER_THAN',
'<<' => 'T_SL',
'>>' => 'T_SR',
'>>>' => 'T_ZSR',
'<<=' => 'T_SL_EQUAL',
'>>=' => 'T_SR_EQUAL',
'>>>=' => 'T_ZSR_EQUAL',
'<=' => 'T_IS_SMALLER_OR_EQUAL',
'>=' => 'T_IS_GREATER_OR_EQUAL',
'=>' => 'T_DOUBLE_ARROW',
'!' => 'T_BOOLEAN_NOT',
'||' => 'T_BOOLEAN_OR',
'&&' => 'T_BOOLEAN_AND',
'|' => 'T_BITWISE_OR',
'&' => 'T_BITWISE_AND',
'!=' => 'T_IS_NOT_EQUAL',
'!==' => 'T_IS_NOT_IDENTICAL',
'=' => 'T_EQUAL',
'==' => 'T_IS_EQUAL',
'===' => 'T_IS_IDENTICAL',
'-=' => 'T_MINUS_EQUAL',
'+=' => 'T_PLUS_EQUAL',
'*=' => 'T_MUL_EQUAL',
'/=' => 'T_DIV_EQUAL',
'%=' => 'T_MOD_EQUAL',
'++' => 'T_INC',
'--' => 'T_DEC',
'//' => 'T_COMMENT',
'/*' => 'T_COMMENT',
'/**' => 'T_DOC_COMMENT',
'*/' => 'T_COMMENT',
];
/**
* A list string delimiters.
*
* @var array
*/
protected $stringTokens = [
'\'' => '\'',
'"' => '"',
];
/**
* A list tokens that start and end comments.
*
* @var array
*/
protected $commentTokens = [
'//' => null,
'/*' => '*/',
'/**' => '*/',
];
/**
* Initialise the tokenizer.
*
* Pre-checks the content to see if it looks minified.
*
* @param string $content The content to tokenize.
* @param \PHP_CodeSniffer\Config $config The config data for the run.
* @param string $eolChar The EOL char used in the content.
*
* @return void
* @throws \PHP_CodeSniffer\Exceptions\TokenizerException If the file appears to be minified.
*/
public function __construct($content, Config $config, $eolChar='\n')
{
if ($this->isMinifiedContent($content, $eolChar) === true) {
throw new TokenizerException('File appears to be minified and cannot be processed');
}
parent::__construct($content, $config, $eolChar);
}//end __construct()
/**
* Creates an array of tokens when given some JS code.
*
* @param string $string The string to tokenize.
*
* @return array
*/
public function tokenize($string)
{
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** START JS TOKENIZING ***".PHP_EOL;
}
$maxTokenLength = 0;
foreach ($this->tokenValues as $token => $values) {
if (strlen($token) > $maxTokenLength) {
$maxTokenLength = strlen($token);
}
}
$tokens = [];
$inString = '';
$stringChar = null;
$inComment = '';
$buffer = '';
$preStringBuffer = '';
$cleanBuffer = false;
$commentTokenizer = new Comment();
$tokens[] = [
'code' => T_OPEN_TAG,
'type' => 'T_OPEN_TAG',
'content' => '',
];
// Convert newlines to single characters for ease of
// processing. We will change them back later.
$string = str_replace($this->eolChar, "\n", $string);
$chars = str_split($string);
$numChars = count($chars);
for ($i = 0; $i < $numChars; $i++) {
$char = $chars[$i];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($char);
$bufferContent = Util\Common::prepareForOutput($buffer);
if ($inString !== '') {
echo "\t";
}
if ($inComment !== '') {
echo "\t";
}
echo "\tProcess char $i => $content (buffer: $bufferContent)".PHP_EOL;
}//end if
if ($inString === '' && $inComment === '' && $buffer !== '') {
// If the buffer only has whitespace and we are about to
// add a character, store the whitespace first.
if (trim($char) !== '' && trim($buffer) === '') {
$tokens[] = [
'code' => T_WHITESPACE,
'type' => 'T_WHITESPACE',
'content' => str_replace("\n", $this->eolChar, $buffer),
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($buffer);
echo "\t=> Added token T_WHITESPACE ($content)".PHP_EOL;
}
$buffer = '';
}
// If the buffer is not whitespace and we are about to
// add a whitespace character, store the content first.
if ($inString === ''
&& $inComment === ''
&& trim($char) === ''
&& trim($buffer) !== ''
) {
$tokens[] = [
'code' => T_STRING,
'type' => 'T_STRING',
'content' => str_replace("\n", $this->eolChar, $buffer),
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($buffer);
echo "\t=> Added token T_STRING ($content)".PHP_EOL;
}
$buffer = '';
}
}//end if
// Process strings.
if ($inComment === '' && isset($this->stringTokens[$char]) === true) {
if ($inString === $char) {
// This could be the end of the string, but make sure it
// is not escaped first.
$escapes = 0;
for ($x = ($i - 1); $x >= 0; $x--) {
if ($chars[$x] !== '\\') {
break;
}
$escapes++;
}
if ($escapes === 0 || ($escapes % 2) === 0) {
// There is an even number escape chars,
// so this is not escaped, it is the end of the string.
$tokens[] = [
'code' => T_CONSTANT_ENCAPSED_STRING,
'type' => 'T_CONSTANT_ENCAPSED_STRING',
'content' => str_replace("\n", $this->eolChar, $buffer).$char,
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* found end of string *".PHP_EOL;
$content = Util\Common::prepareForOutput($buffer.$char);
echo "\t=> Added token T_CONSTANT_ENCAPSED_STRING ($content)".PHP_EOL;
}
$buffer = '';
$preStringBuffer = '';
$inString = '';
$stringChar = null;
continue;
}//end if
} else if ($inString === '') {
$inString = $char;
$stringChar = $i;
$preStringBuffer = $buffer;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* looking for string closer *".PHP_EOL;
}
}//end if
}//end if
if ($inString !== '' && $char === "\n") {
// Unless this newline character is escaped, the string did not
// end before the end of the line, which means it probably
// wasn't a string at all (maybe a regex).
if ($chars[($i - 1)] !== '\\') {
$i = $stringChar;
$buffer = $preStringBuffer;
$preStringBuffer = '';
$inString = '';
$stringChar = null;
$char = $chars[$i];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* found newline before end of string, bailing *".PHP_EOL;
}
}
}
$buffer .= $char;
// We don't look for special tokens inside strings,
// so if we are in a string, we can continue here now
// that the current char is in the buffer.
if ($inString !== '') {
continue;
}
// Special case for T_DIVIDE which can actually be
// the start of a regular expression.
if ($buffer === $char && $char === '/' && $chars[($i + 1)] !== '*') {
$regex = $this->getRegexToken($i, $string, $chars, $tokens);
if ($regex !== null) {
$tokens[] = [
'code' => T_REGULAR_EXPRESSION,
'type' => 'T_REGULAR_EXPRESSION',
'content' => $regex['content'],
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($regex['content']);
echo "\t=> Added token T_REGULAR_EXPRESSION ($content)".PHP_EOL;
}
$i = $regex['end'];
$buffer = '';
$cleanBuffer = false;
continue;
}//end if
}//end if
// Check for known tokens, but ignore tokens found that are not at
// the end of a string, like FOR and this.FORmat.
if (isset($this->tokenValues[strtolower($buffer)]) === true
&& (preg_match('|[a-zA-z0-9_]|', $char) === 0
|| isset($chars[($i + 1)]) === false
|| preg_match('|[a-zA-z0-9_]|', $chars[($i + 1)]) === 0)
) {
$matchedToken = false;
$lookAheadLength = ($maxTokenLength - strlen($buffer));
if ($lookAheadLength > 0) {
// The buffer contains a token type, but we need
// to look ahead at the next chars to see if this is
// actually part of a larger token. For example,
// FOR and FOREACH.
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* buffer possibly contains token, looking ahead $lookAheadLength chars *".PHP_EOL;
}
$charBuffer = $buffer;
for ($x = 1; $x <= $lookAheadLength; $x++) {
if (isset($chars[($i + $x)]) === false) {
break;
}
$charBuffer .= $chars[($i + $x)];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($charBuffer);
echo "\t\t=> Looking ahead $x chars => $content".PHP_EOL;
}
if (isset($this->tokenValues[strtolower($charBuffer)]) === true) {
// We've found something larger that matches
// so we can ignore this char. Except for 1 very specific
// case where a comment like /**/ needs to tokenize as
// T_COMMENT and not T_DOC_COMMENT.
$oldType = $this->tokenValues[strtolower($buffer)];
$newType = $this->tokenValues[strtolower($charBuffer)];
if ($oldType === 'T_COMMENT'
&& $newType === 'T_DOC_COMMENT'
&& $chars[($i + $x + 1)] === '/'
) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* look ahead ignored T_DOC_COMMENT, continuing *".PHP_EOL;
}
} else {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* look ahead found more specific token ($newType), ignoring $i *".PHP_EOL;
}
$matchedToken = true;
break;
}
}//end if
}//end for
}//end if
if ($matchedToken === false) {
if (PHP_CODESNIFFER_VERBOSITY > 1 && $lookAheadLength > 0) {
echo "\t\t* look ahead found nothing *".PHP_EOL;
}
$value = $this->tokenValues[strtolower($buffer)];
if ($value === 'T_FUNCTION' && $buffer !== 'function') {
// The function keyword needs to be all lowercase or else
// it is just a function called "Function".
$value = 'T_STRING';
}
$tokens[] = [
'code' => constant($value),
'type' => $value,
'content' => $buffer,
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($buffer);
echo "\t=> Added token $value ($content)".PHP_EOL;
}
$cleanBuffer = true;
}//end if
} else if (isset($this->tokenValues[strtolower($char)]) === true) {
// No matter what token we end up using, we don't
// need the content in the buffer any more because we have
// found a valid token.
$newContent = substr(str_replace("\n", $this->eolChar, $buffer), 0, -1);
if ($newContent !== '') {
$tokens[] = [
'code' => T_STRING,
'type' => 'T_STRING',
'content' => $newContent,
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput(substr($buffer, 0, -1));
echo "\t=> Added token T_STRING ($content)".PHP_EOL;
}
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* char is token, looking ahead ".($maxTokenLength - 1).' chars *'.PHP_EOL;
}
// The char is a token type, but we need to look ahead at the
// next chars to see if this is actually part of a larger token.
// For example, = and ===.
$charBuffer = $char;
$matchedToken = false;
for ($x = 1; $x <= $maxTokenLength; $x++) {
if (isset($chars[($i + $x)]) === false) {
break;
}
$charBuffer .= $chars[($i + $x)];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($charBuffer);
echo "\t\t=> Looking ahead $x chars => $content".PHP_EOL;
}
if (isset($this->tokenValues[strtolower($charBuffer)]) === true) {
// We've found something larger that matches
// so we can ignore this char.
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokenValues[strtolower($charBuffer)];
echo "\t\t* look ahead found more specific token ($type), ignoring $i *".PHP_EOL;
}
$matchedToken = true;
break;
}
}//end for
if ($matchedToken === false) {
$value = $this->tokenValues[strtolower($char)];
$tokens[] = [
'code' => constant($value),
'type' => $value,
'content' => $char,
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* look ahead found nothing *".PHP_EOL;
$content = Util\Common::prepareForOutput($char);
echo "\t=> Added token $value ($content)".PHP_EOL;
}
$cleanBuffer = true;
} else {
$buffer = $char;
}//end if
}//end if
// Keep track of content inside comments.
if ($inComment === ''
&& array_key_exists($buffer, $this->commentTokens) === true
) {
// This is not really a comment if the content
// looks like \// (i.e., it is escaped).
if (isset($chars[($i - 2)]) === true && $chars[($i - 2)] === '\\') {
$lastToken = array_pop($tokens);
$lastContent = $lastToken['content'];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$value = $this->tokenValues[strtolower($lastContent)];
$content = Util\Common::prepareForOutput($lastContent);
echo "\t=> Removed token $value ($content)".PHP_EOL;
}
$lastChars = str_split($lastContent);
$lastNumChars = count($lastChars);
for ($x = 0; $x < $lastNumChars; $x++) {
$lastChar = $lastChars[$x];
$value = $this->tokenValues[strtolower($lastChar)];
$tokens[] = [
'code' => constant($value),
'type' => $value,
'content' => $lastChar,
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($lastChar);
echo "\t=> Added token $value ($content)".PHP_EOL;
}
}
} else {
// We have started a comment.
$inComment = $buffer;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t\t* looking for end of comment *".PHP_EOL;
}
}//end if
} else if ($inComment !== '') {
if ($this->commentTokens[$inComment] === null) {
// Comment ends at the next newline.
if (strpos($buffer, "\n") !== false) {
$inComment = '';
}
} else {
if ($this->commentTokens[$inComment] === $buffer) {
$inComment = '';
}
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
if ($inComment === '') {
echo "\t\t* found end of comment *".PHP_EOL;
}
}
if ($inComment === '' && $cleanBuffer === false) {
$tokens[] = [
'code' => T_STRING,
'type' => 'T_STRING',
'content' => str_replace("\n", $this->eolChar, $buffer),
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($buffer);
echo "\t=> Added token T_STRING ($content)".PHP_EOL;
}
$buffer = '';
}
}//end if
if ($cleanBuffer === true) {
$buffer = '';
$cleanBuffer = false;
}
}//end for
if (empty($buffer) === false) {
if ($inString !== '') {
// The string did not end before the end of the file,
// which means there was probably a syntax error somewhere.
$tokens[] = [
'code' => T_STRING,
'type' => 'T_STRING',
'content' => str_replace("\n", $this->eolChar, $buffer),
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($buffer);
echo "\t=> Added token T_STRING ($content)".PHP_EOL;
}
} else {
// Buffer contains whitespace from the end of the file.
$tokens[] = [
'code' => T_WHITESPACE,
'type' => 'T_WHITESPACE',
'content' => str_replace("\n", $this->eolChar, $buffer),
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$content = Util\Common::prepareForOutput($buffer);
echo "\t=> Added token T_WHITESPACE ($content)".PHP_EOL;
}
}//end if
}//end if
$tokens[] = [
'code' => T_CLOSE_TAG,
'type' => 'T_CLOSE_TAG',
'content' => '',
];
/*
Now that we have done some basic tokenizing, we need to
modify the tokens to join some together and split some apart
so they match what the PHP tokenizer does.
*/
$finalTokens = [];
$newStackPtr = 0;
$numTokens = count($tokens);
for ($stackPtr = 0; $stackPtr < $numTokens; $stackPtr++) {
$token = $tokens[$stackPtr];
/*
Look for comments and join the tokens together.
*/
if ($token['code'] === T_COMMENT || $token['code'] === T_DOC_COMMENT) {
$newContent = '';
$tokenContent = $token['content'];
$endContent = null;
if (isset($this->commentTokens[$tokenContent]) === true) {
$endContent = $this->commentTokens[$tokenContent];
}
while ($tokenContent !== $endContent) {
if ($endContent === null
&& strpos($tokenContent, $this->eolChar) !== false
) {
// A null end token means the comment ends at the end of
// the line so we look for newlines and split the token.
$tokens[$stackPtr]['content'] = substr(
$tokenContent,
(strpos($tokenContent, $this->eolChar) + strlen($this->eolChar))
);
$tokenContent = substr(
$tokenContent,
0,
(strpos($tokenContent, $this->eolChar) + strlen($this->eolChar))
);
// If the substr failed, skip the token as the content
// will now be blank.
if ($tokens[$stackPtr]['content'] !== false
&& $tokens[$stackPtr]['content'] !== ''
) {
$stackPtr--;
}
break;
}//end if
$stackPtr++;
$newContent .= $tokenContent;
if (isset($tokens[$stackPtr]) === false) {
break;
}
$tokenContent = $tokens[$stackPtr]['content'];
}//end while
if ($token['code'] === T_DOC_COMMENT) {
$commentTokens = $commentTokenizer->tokenizeString($newContent.$tokenContent, $this->eolChar, $newStackPtr);
foreach ($commentTokens as $commentToken) {
$finalTokens[$newStackPtr] = $commentToken;
$newStackPtr++;
}
continue;
} else {
// Save the new content in the current token so
// the code below can chop it up on newlines.
$token['content'] = $newContent.$tokenContent;
}
}//end if
/*
If this token has newlines in its content, split each line up
and create a new token for each line. We do this so it's easier
to ascertain where errors occur on a line.
Note that $token[1] is the token's content.
*/
if (strpos($token['content'], $this->eolChar) !== false) {
$tokenLines = explode($this->eolChar, $token['content']);
$numLines = count($tokenLines);
for ($i = 0; $i < $numLines; $i++) {
$newToken = ['content' => $tokenLines[$i]];
if ($i === ($numLines - 1)) {
if ($tokenLines[$i] === '') {
break;
}
} else {
$newToken['content'] .= $this->eolChar;
}
$newToken['type'] = $token['type'];
$newToken['code'] = $token['code'];
$finalTokens[$newStackPtr] = $newToken;
$newStackPtr++;
}
} else {
$finalTokens[$newStackPtr] = $token;
$newStackPtr++;
}//end if
// Convert numbers, including decimals.
if ($token['code'] === T_STRING
|| $token['code'] === T_OBJECT_OPERATOR
) {
$newContent = '';
$oldStackPtr = $stackPtr;
while (preg_match('|^[0-9\.]+$|', $tokens[$stackPtr]['content']) !== 0) {
$newContent .= $tokens[$stackPtr]['content'];
$stackPtr++;
}
if ($newContent !== '' && $newContent !== '.') {
$finalTokens[($newStackPtr - 1)]['content'] = $newContent;
if (ctype_digit($newContent) === true) {
$finalTokens[($newStackPtr - 1)]['code'] = constant('T_LNUMBER');
$finalTokens[($newStackPtr - 1)]['type'] = 'T_LNUMBER';
} else {
$finalTokens[($newStackPtr - 1)]['code'] = constant('T_DNUMBER');
$finalTokens[($newStackPtr - 1)]['type'] = 'T_DNUMBER';
}
$stackPtr--;
continue;
} else {
$stackPtr = $oldStackPtr;
}
}//end if
// Convert the token after an object operator into a string, in most cases.
if ($token['code'] === T_OBJECT_OPERATOR) {
for ($i = ($stackPtr + 1); $i < $numTokens; $i++) {
if (isset(Util\Tokens::$emptyTokens[$tokens[$i]['code']]) === true) {
continue;
}
if ($tokens[$i]['code'] !== T_PROTOTYPE
&& $tokens[$i]['code'] !== T_LNUMBER
&& $tokens[$i]['code'] !== T_DNUMBER
) {
$tokens[$i]['code'] = T_STRING;
$tokens[$i]['type'] = 'T_STRING';
}
break;
}
}
}//end for
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** END TOKENIZING ***".PHP_EOL;
}
return $finalTokens;
}//end tokenize()
/**
* Tokenizes a regular expression if one is found.
*
* If a regular expression is not found, NULL is returned.
*
* @param int $char The index of the possible regex start character.
* @param string $string The complete content of the string being tokenized.
* @param array $chars An array of characters being tokenized.
* @param array $tokens The current array of tokens found in the string.
*
* @return array<string, string>|null
*/
public function getRegexToken($char, $string, $chars, $tokens)
{
$beforeTokens = [
T_EQUAL => true,
T_IS_NOT_EQUAL => true,
T_IS_IDENTICAL => true,
T_IS_NOT_IDENTICAL => true,
T_OPEN_PARENTHESIS => true,
T_OPEN_SQUARE_BRACKET => true,
T_RETURN => true,
T_BOOLEAN_OR => true,
T_BOOLEAN_AND => true,
T_BOOLEAN_NOT => true,
T_BITWISE_OR => true,
T_BITWISE_AND => true,
T_COMMA => true,
T_COLON => true,
T_TYPEOF => true,
T_INLINE_THEN => true,
T_INLINE_ELSE => true,
];
$afterTokens = [
',' => true,
')' => true,
']' => true,
';' => true,
' ' => true,
'.' => true,
':' => true,
$this->eolChar => true,
];
// Find the last non-whitespace token that was added
// to the tokens array.
$numTokens = count($tokens);
for ($prev = ($numTokens - 1); $prev >= 0; $prev--) {
if (isset(Util\Tokens::$emptyTokens[$tokens[$prev]['code']]) === false) {
break;
}
}
if (isset($beforeTokens[$tokens[$prev]['code']]) === false) {
return null;
}
// This is probably a regular expression, so look for the end of it.
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t* token possibly starts a regular expression *".PHP_EOL;
}
$numChars = count($chars);
for ($next = ($char + 1); $next < $numChars; $next++) {
if ($chars[$next] === '/') {
// Just make sure this is not escaped first.
if ($chars[($next - 1)] !== '\\') {
// In the simple form: /.../ so we found the end.
break;
} else if ($chars[($next - 2)] === '\\') {
// In the form: /...\\/ so we found the end.
break;
}
} else {
$possibleEolChar = substr($string, $next, strlen($this->eolChar));
if ($possibleEolChar === $this->eolChar) {
// This is the last token on the line and regular
// expressions need to be defined on a single line,
// so this is not a regular expression.
break;
}
}
}
if ($chars[$next] !== '/') {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t* could not find end of regular expression *".PHP_EOL;
}
return null;
}
while (preg_match('|[a-zA-Z]|', $chars[($next + 1)]) !== 0) {
// The token directly after the end of the regex can
// be modifiers like global and case insensitive
// (.e.g, /pattern/gi).
$next++;
}
$regexEnd = $next;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t* found end of regular expression at token $regexEnd *".PHP_EOL;
}
for ($next += 1; $next < $numChars; $next++) {
if ($chars[$next] !== ' ') {
break;
} else {
$possibleEolChar = substr($string, $next, strlen($this->eolChar));
if ($possibleEolChar === $this->eolChar) {
// This is the last token on the line.
break;
}
}
}
if (isset($afterTokens[$chars[$next]]) === false) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t* tokens after regular expression do not look correct *".PHP_EOL;
}
return null;
}
// This is a regular expression, so join all the tokens together.
$content = '';
for ($x = $char; $x <= $regexEnd; $x++) {
$content .= $chars[$x];
}
$token = [
'start' => $char,
'end' => $regexEnd,
'content' => $content,
];
return $token;
}//end getRegexToken()
/**
* Performs additional processing after main tokenizing.
*
* This additional processing looks for properties, closures, labels and objects.
*
* @return void
*/
public function processAdditional()
{
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** START ADDITIONAL JS PROCESSING ***".PHP_EOL;
}
$numTokens = count($this->tokens);
$classStack = [];
for ($i = 0; $i < $numTokens; $i++) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokens[$i]['type'];
$content = Util\Common::prepareForOutput($this->tokens[$i]['content']);
echo str_repeat("\t", count($classStack));
echo "\tProcess token $i: $type => $content".PHP_EOL;
}
// Looking for functions that are actually closures.
if ($this->tokens[$i]['code'] === T_FUNCTION && isset($this->tokens[$i]['scope_opener']) === true) {
for ($x = ($i + 1); $x < $numTokens; $x++) {
if (isset(Util\Tokens::$emptyTokens[$this->tokens[$x]['code']]) === false) {
break;
}
}
if ($this->tokens[$x]['code'] === T_OPEN_PARENTHESIS) {
$this->tokens[$i]['code'] = T_CLOSURE;
$this->tokens[$i]['type'] = 'T_CLOSURE';
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$line = $this->tokens[$i]['line'];
echo str_repeat("\t", count($classStack));
echo "\t* token $i on line $line changed from T_FUNCTION to T_CLOSURE *".PHP_EOL;
}
for ($x = ($this->tokens[$i]['scope_opener'] + 1); $x < $this->tokens[$i]['scope_closer']; $x++) {
if (isset($this->tokens[$x]['conditions'][$i]) === false) {
continue;
}
$this->tokens[$x]['conditions'][$i] = T_CLOSURE;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokens[$x]['type'];
echo str_repeat("\t", count($classStack));
echo "\t\t* cleaned $x ($type) *".PHP_EOL;
}
}
}//end if
continue;
} else if ($this->tokens[$i]['code'] === T_OPEN_CURLY_BRACKET
&& isset($this->tokens[$i]['scope_condition']) === false
&& isset($this->tokens[$i]['bracket_closer']) === true
) {
$condition = $this->tokens[$i]['conditions'];
$condition = end($condition);
if ($condition === T_CLASS) {
// Possibly an ES6 method. To be classified as one, the previous
// non-empty tokens need to be a set of parenthesis, and then a string
// (the method name).
for ($parenCloser = ($i - 1); $parenCloser > 0; $parenCloser--) {
if (isset(Util\Tokens::$emptyTokens[$this->tokens[$parenCloser]['code']]) === false) {
break;
}
}
if ($this->tokens[$parenCloser]['code'] === T_CLOSE_PARENTHESIS) {
$parenOpener = $this->tokens[$parenCloser]['parenthesis_opener'];
for ($name = ($parenOpener - 1); $name > 0; $name--) {
if (isset(Util\Tokens::$emptyTokens[$this->tokens[$name]['code']]) === false) {
break;
}
}
if ($this->tokens[$name]['code'] === T_STRING) {
// We found a method name.
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$line = $this->tokens[$name]['line'];
echo str_repeat("\t", count($classStack));
echo "\t* token $name on line $line changed from T_STRING to T_FUNCTION *".PHP_EOL;
}
$closer = $this->tokens[$i]['bracket_closer'];
$this->tokens[$name]['code'] = T_FUNCTION;
$this->tokens[$name]['type'] = 'T_FUNCTION';
foreach ([$name, $i, $closer] as $token) {
$this->tokens[$token]['scope_condition'] = $name;
$this->tokens[$token]['scope_opener'] = $i;
$this->tokens[$token]['scope_closer'] = $closer;
$this->tokens[$token]['parenthesis_opener'] = $parenOpener;
$this->tokens[$token]['parenthesis_closer'] = $parenCloser;
$this->tokens[$token]['parenthesis_owner'] = $name;
}
$this->tokens[$parenOpener]['parenthesis_owner'] = $name;
$this->tokens[$parenCloser]['parenthesis_owner'] = $name;
for ($x = ($i + 1); $x < $closer; $x++) {
$this->tokens[$x]['conditions'][$name] = T_FUNCTION;
ksort($this->tokens[$x]['conditions'], SORT_NUMERIC);
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokens[$x]['type'];
echo str_repeat("\t", count($classStack));
echo "\t\t* added T_FUNCTION condition to $x ($type) *".PHP_EOL;
}
}
continue;
}//end if
}//end if
}//end if
$classStack[] = $i;
$closer = $this->tokens[$i]['bracket_closer'];
$this->tokens[$i]['code'] = T_OBJECT;
$this->tokens[$i]['type'] = 'T_OBJECT';
$this->tokens[$closer]['code'] = T_CLOSE_OBJECT;
$this->tokens[$closer]['type'] = 'T_CLOSE_OBJECT';
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", count($classStack));
echo "\t* token $i converted from T_OPEN_CURLY_BRACKET to T_OBJECT *".PHP_EOL;
echo str_repeat("\t", count($classStack));
echo "\t* token $closer converted from T_CLOSE_CURLY_BRACKET to T_CLOSE_OBJECT *".PHP_EOL;
}
for ($x = ($i + 1); $x < $closer; $x++) {
$this->tokens[$x]['conditions'][$i] = T_OBJECT;
ksort($this->tokens[$x]['conditions'], SORT_NUMERIC);
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokens[$x]['type'];
echo str_repeat("\t", count($classStack));
echo "\t\t* added T_OBJECT condition to $x ($type) *".PHP_EOL;
}
}
} else if ($this->tokens[$i]['code'] === T_CLOSE_OBJECT) {
array_pop($classStack);
} else if ($this->tokens[$i]['code'] === T_COLON) {
// If it is a scope opener, it belongs to a
// DEFAULT or CASE statement.
if (isset($this->tokens[$i]['scope_condition']) === true) {
continue;
}
// Make sure this is not part of an inline IF statement.
for ($x = ($i - 1); $x >= 0; $x--) {
if ($this->tokens[$x]['code'] === T_INLINE_THEN) {
$this->tokens[$i]['code'] = T_INLINE_ELSE;
$this->tokens[$i]['type'] = 'T_INLINE_ELSE';
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", count($classStack));
echo "\t* token $i converted from T_COLON to T_INLINE_THEN *".PHP_EOL;
}
continue(2);
} else if ($this->tokens[$x]['line'] < $this->tokens[$i]['line']) {
break;
}
}
// The string to the left of the colon is either a property or label.
for ($label = ($i - 1); $label >= 0; $label--) {
if (isset(Util\Tokens::$emptyTokens[$this->tokens[$label]['code']]) === false) {
break;
}
}
if ($this->tokens[$label]['code'] !== T_STRING
&& $this->tokens[$label]['code'] !== T_CONSTANT_ENCAPSED_STRING
) {
continue;
}
if (empty($classStack) === false) {
$this->tokens[$label]['code'] = T_PROPERTY;
$this->tokens[$label]['type'] = 'T_PROPERTY';
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", count($classStack));
echo "\t* token $label converted from T_STRING to T_PROPERTY *".PHP_EOL;
}
} else {
$this->tokens[$label]['code'] = T_LABEL;
$this->tokens[$label]['type'] = 'T_LABEL';
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", count($classStack));
echo "\t* token $label converted from T_STRING to T_LABEL *".PHP_EOL;
}
}//end if
}//end if
}//end for
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** END ADDITIONAL JS PROCESSING ***".PHP_EOL;
}
}//end processAdditional()
}//end class

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