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Tokenizer.php
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Tokenizer.php
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<?php
/**
* The base tokenizer class.
*
* @author Greg Sherwood <gsherwood@squiz.net>
* @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
* @license https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
*/
namespace PHP_CodeSniffer\Tokenizers;
use PHP_CodeSniffer\Exceptions\RuntimeException;
use PHP_CodeSniffer\Util;
abstract class Tokenizer
{
/**
* The config data for the run.
*
* @var \PHP_CodeSniffer\Config
*/
protected $config = null;
/**
* The EOL char used in the content.
*
* @var string
*/
protected $eolChar = [];
/**
* A token-based representation of the content.
*
* @var array
*/
protected $tokens = [];
/**
* Known lengths of tokens.
*
* @var array<int, int>
*/
public $knownLengths = [];
/**
* A list of lines being ignored due to error suppression comments.
*
* @var array
*/
public $ignoredLines = [];
/**
* Initialise and run the tokenizer.
*
* @param string $content The content to tokenize,
* @param \PHP_CodeSniffer\Config | null $config The config data for the run.
* @param string $eolChar The EOL char used in the content.
*
* @return void
* @throws TokenizerException If the file appears to be minified.
*/
public function __construct($content, $config, $eolChar='\n')
{
$this->eolChar = $eolChar;
$this->config = $config;
$this->tokens = $this->tokenize($content);
if ($config === null) {
return;
}
$this->createPositionMap();
$this->createTokenMap();
$this->createParenthesisNestingMap();
$this->createScopeMap();
$this->createLevelMap();
// Allow the tokenizer to do additional processing if required.
$this->processAdditional();
}//end __construct()
/**
* Checks the content to see if it looks minified.
*
* @param string $content The content to tokenize.
* @param string $eolChar The EOL char used in the content.
*
* @return boolean
*/
protected function isMinifiedContent($content, $eolChar='\n')
{
// Minified files often have a very large number of characters per line
// and cause issues when tokenizing.
$numChars = strlen($content);
$numLines = (substr_count($content, $eolChar) + 1);
$average = ($numChars / $numLines);
if ($average > 100) {
return true;
}
return false;
}//end isMinifiedContent()
/**
* Gets the array of tokens.
*
* @return array
*/
public function getTokens()
{
return $this->tokens;
}//end getTokens()
/**
* Creates an array of tokens when given some content.
*
* @param string $string The string to tokenize.
*
* @return array
*/
abstract protected function tokenize($string);
/**
* Performs additional processing after main tokenizing.
*
* @return void
*/
abstract protected function processAdditional();
/**
* Sets token position information.
*
* Can also convert tabs into spaces. Each tab can represent between
* 1 and $width spaces, so this cannot be a straight string replace.
*
* @return void
*/
private function createPositionMap()
{
$currColumn = 1;
$lineNumber = 1;
$eolLen = strlen($this->eolChar);
$ignoring = null;
$inTests = defined('PHP_CODESNIFFER_IN_TESTS');
$checkEncoding = false;
if (function_exists('iconv_strlen') === true) {
$checkEncoding = true;
}
$checkAnnotations = $this->config->annotations;
$encoding = $this->config->encoding;
$tabWidth = $this->config->tabWidth;
$this->tokensWithTabs = [
T_WHITESPACE => true,
T_COMMENT => true,
T_DOC_COMMENT => true,
T_DOC_COMMENT_WHITESPACE => true,
T_DOC_COMMENT_STRING => true,
T_CONSTANT_ENCAPSED_STRING => true,
T_DOUBLE_QUOTED_STRING => true,
T_HEREDOC => true,
T_NOWDOC => true,
T_INLINE_HTML => true,
];
$this->numTokens = count($this->tokens);
for ($i = 0; $i < $this->numTokens; $i++) {
$this->tokens[$i]['line'] = $lineNumber;
$this->tokens[$i]['column'] = $currColumn;
if (isset($this->knownLengths[$this->tokens[$i]['code']]) === true) {
// There are no tabs in the tokens we know the length of.
$length = $this->knownLengths[$this->tokens[$i]['code']];
$currColumn += $length;
} else if ($tabWidth === 0
|| isset($this->tokensWithTabs[$this->tokens[$i]['code']]) === false
|| strpos($this->tokens[$i]['content'], "\t") === false
) {
// There are no tabs in this content, or we aren't replacing them.
if ($checkEncoding === true) {
// Not using the default encoding, so take a bit more care.
$oldLevel = error_reporting();
error_reporting(0);
$length = iconv_strlen($this->tokens[$i]['content'], $encoding);
error_reporting($oldLevel);
if ($length === false) {
// String contained invalid characters, so revert to default.
$length = strlen($this->tokens[$i]['content']);
}
} else {
$length = strlen($this->tokens[$i]['content']);
}
$currColumn += $length;
} else {
$this->replaceTabsInToken($this->tokens[$i]);
$length = $this->tokens[$i]['length'];
$currColumn += $length;
}//end if
$this->tokens[$i]['length'] = $length;
if (isset($this->knownLengths[$this->tokens[$i]['code']]) === false
&& strpos($this->tokens[$i]['content'], $this->eolChar) !== false
) {
$lineNumber++;
$currColumn = 1;
// Newline chars are not counted in the token length.
$this->tokens[$i]['length'] -= $eolLen;
}
if ($this->tokens[$i]['code'] === T_COMMENT
|| $this->tokens[$i]['code'] === T_DOC_COMMENT_STRING
|| $this->tokens[$i]['code'] === T_DOC_COMMENT_TAG
|| ($inTests === true && $this->tokens[$i]['code'] === T_INLINE_HTML)
) {
$commentText = ltrim($this->tokens[$i]['content'], " \t/*");
$commentText = rtrim($commentText, " */\t\r\n");
$commentTextLower = strtolower($commentText);
if (strpos($commentText, '@codingStandards') !== false) {
// If this comment is the only thing on the line, it tells us
// to ignore the following line. If the line contains other content
// then we are just ignoring this one single line.
$ownLine = false;
if ($i > 0) {
for ($prev = ($i - 1); $prev >= 0; $prev--) {
if ($this->tokens[$prev]['code'] === T_WHITESPACE) {
continue;
}
break;
}
if ($this->tokens[$prev]['line'] !== $this->tokens[$i]['line']) {
$ownLine = true;
}
}
if ($ignoring === null
&& strpos($commentText, '@codingStandardsIgnoreStart') !== false
) {
$ignoring = ['.all' => true];
if ($ownLine === true) {
$this->ignoredLines[$this->tokens[$i]['line']] = $ignoring;
}
} else if ($ignoring !== null
&& strpos($commentText, '@codingStandardsIgnoreEnd') !== false
) {
if ($ownLine === true) {
$this->ignoredLines[$this->tokens[$i]['line']] = ['.all' => true];
} else {
$this->ignoredLines[$this->tokens[$i]['line']] = $ignoring;
}
$ignoring = null;
} else if ($ignoring === null
&& strpos($commentText, '@codingStandardsIgnoreLine') !== false
) {
$ignoring = ['.all' => true];
if ($ownLine === true) {
$this->ignoredLines[$this->tokens[$i]['line']] = $ignoring;
$this->ignoredLines[($this->tokens[$i]['line'] + 1)] = $ignoring;
} else {
$this->ignoredLines[$this->tokens[$i]['line']] = $ignoring;
}
$ignoring = null;
}//end if
} else if (substr($commentTextLower, 0, 6) === 'phpcs:'
|| substr($commentTextLower, 0, 7) === '@phpcs:'
) {
// If the @phpcs: syntax is being used, strip the @ to make
// comparisons easier.
if ($commentText[0] === '@') {
$commentText = substr($commentText, 1);
$commentTextLower = strtolower($commentText);
}
// If there is a comment on the end, strip it off.
$commentStart = strpos($commentTextLower, ' --');
if ($commentStart !== false) {
$commentText = substr($commentText, 0, $commentStart);
$commentTextLower = strtolower($commentText);
}
// If this comment is the only thing on the line, it tells us
// to ignore the following line. If the line contains other content
// then we are just ignoring this one single line.
$lineHasOtherContent = false;
$lineHasOtherTokens = false;
if ($i > 0) {
for ($prev = ($i - 1); $prev > 0; $prev--) {
if ($this->tokens[$prev]['line'] !== $this->tokens[$i]['line']) {
// Changed lines.
break;
}
if ($this->tokens[$prev]['code'] === T_WHITESPACE
|| ($this->tokens[$prev]['code'] === T_INLINE_HTML
&& trim($this->tokens[$prev]['content']) === '')
) {
continue;
}
$lineHasOtherTokens = true;
if ($this->tokens[$prev]['code'] === T_OPEN_TAG) {
continue;
}
$lineHasOtherContent = true;
break;
}//end for
$changedLines = false;
for ($next = $i; $next < $this->numTokens; $next++) {
if ($changedLines === true) {
// Changed lines.
break;
}
if (isset($this->knownLengths[$this->tokens[$next]['code']]) === false
&& strpos($this->tokens[$next]['content'], $this->eolChar) !== false
) {
// Last token on the current line.
$changedLines = true;
}
if ($next === $i) {
continue;
}
if ($this->tokens[$next]['code'] === T_WHITESPACE
|| ($this->tokens[$next]['code'] === T_INLINE_HTML
&& trim($this->tokens[$next]['content']) === '')
) {
continue;
}
$lineHasOtherTokens = true;
if ($this->tokens[$next]['code'] === T_CLOSE_TAG) {
continue;
}
$lineHasOtherContent = true;
break;
}//end for
}//end if
if (substr($commentTextLower, 0, 9) === 'phpcs:set') {
// Ignore standards for complete lines that change sniff settings.
if ($lineHasOtherTokens === false) {
$this->ignoredLines[$this->tokens[$i]['line']] = ['.all' => true];
}
$this->tokens[$i]['code'] = T_PHPCS_SET;
$this->tokens[$i]['type'] = 'T_PHPCS_SET';
} else if (substr($commentTextLower, 0, 16) === 'phpcs:ignorefile') {
// The whole file will be ignored, but at least set the correct token.
$this->tokens[$i]['code'] = T_PHPCS_IGNORE_FILE;
$this->tokens[$i]['type'] = 'T_PHPCS_IGNORE_FILE';
} else if (substr($commentTextLower, 0, 13) === 'phpcs:disable') {
if ($lineHasOtherContent === false) {
// Completely ignore the comment line.
$this->ignoredLines[$this->tokens[$i]['line']] = ['.all' => true];
}
if ($ignoring === null) {
$ignoring = [];
}
$disabledSniffs = [];
$additionalText = substr($commentText, 14);
if ($additionalText === false) {
$ignoring = ['.all' => true];
} else {
$parts = explode(',', substr($commentText, 13));
foreach ($parts as $sniffCode) {
$sniffCode = trim($sniffCode);
$disabledSniffs[$sniffCode] = true;
$ignoring[$sniffCode] = true;
// This newly disabled sniff might be disabling an existing
// enabled exception that we are tracking.
if (isset($ignoring['.except']) === true) {
foreach (array_keys($ignoring['.except']) as $ignoredSniffCode) {
if ($ignoredSniffCode === $sniffCode
|| strpos($ignoredSniffCode, $sniffCode.'.') === 0
) {
unset($ignoring['.except'][$ignoredSniffCode]);
}
}
if (empty($ignoring['.except']) === true) {
unset($ignoring['.except']);
}
}
}//end foreach
}//end if
$this->tokens[$i]['code'] = T_PHPCS_DISABLE;
$this->tokens[$i]['type'] = 'T_PHPCS_DISABLE';
$this->tokens[$i]['sniffCodes'] = $disabledSniffs;
} else if (substr($commentTextLower, 0, 12) === 'phpcs:enable') {
if ($ignoring !== null) {
$enabledSniffs = [];
$additionalText = substr($commentText, 13);
if ($additionalText === false) {
$ignoring = null;
} else {
$parts = explode(',', substr($commentText, 13));
foreach ($parts as $sniffCode) {
$sniffCode = trim($sniffCode);
$enabledSniffs[$sniffCode] = true;
// This new enabled sniff might remove previously disabled
// sniffs if it is actually a standard or category of sniffs.
foreach (array_keys($ignoring) as $ignoredSniffCode) {
if ($ignoredSniffCode === $sniffCode
|| strpos($ignoredSniffCode, $sniffCode.'.') === 0
) {
unset($ignoring[$ignoredSniffCode]);
}
}
// This new enabled sniff might be able to clear up
// previously enabled sniffs if it is actually a standard or
// category of sniffs.
if (isset($ignoring['.except']) === true) {
foreach (array_keys($ignoring['.except']) as $ignoredSniffCode) {
if ($ignoredSniffCode === $sniffCode
|| strpos($ignoredSniffCode, $sniffCode.'.') === 0
) {
unset($ignoring['.except'][$ignoredSniffCode]);
}
}
}
}//end foreach
if (empty($ignoring) === true) {
$ignoring = null;
} else {
if (isset($ignoring['.except']) === true) {
$ignoring['.except'] += $enabledSniffs;
} else {
$ignoring['.except'] = $enabledSniffs;
}
}
}//end if
if ($lineHasOtherContent === false) {
// Completely ignore the comment line.
$this->ignoredLines[$this->tokens[$i]['line']] = ['.all' => true];
} else {
// The comment is on the same line as the code it is ignoring,
// so respect the new ignore rules.
$this->ignoredLines[$this->tokens[$i]['line']] = $ignoring;
}
$this->tokens[$i]['sniffCodes'] = $enabledSniffs;
}//end if
$this->tokens[$i]['code'] = T_PHPCS_ENABLE;
$this->tokens[$i]['type'] = 'T_PHPCS_ENABLE';
} else if (substr($commentTextLower, 0, 12) === 'phpcs:ignore') {
$ignoreRules = [];
$additionalText = substr($commentText, 13);
if ($additionalText === false) {
$ignoreRules = ['.all' => true];
} else {
$parts = explode(',', substr($commentText, 13));
foreach ($parts as $sniffCode) {
$ignoreRules[trim($sniffCode)] = true;
}
}
$this->tokens[$i]['code'] = T_PHPCS_IGNORE;
$this->tokens[$i]['type'] = 'T_PHPCS_IGNORE';
$this->tokens[$i]['sniffCodes'] = $ignoreRules;
if ($ignoring !== null) {
$ignoreRules += $ignoring;
}
if ($lineHasOtherContent === false) {
// Completely ignore the comment line, and set the folllowing
// line to include the ignore rules we've set.
$this->ignoredLines[$this->tokens[$i]['line']] = ['.all' => true];
$this->ignoredLines[($this->tokens[$i]['line'] + 1)] = $ignoreRules;
} else {
// The comment is on the same line as the code it is ignoring,
// so respect the ignore rules it set.
$this->ignoredLines[$this->tokens[$i]['line']] = $ignoreRules;
}
}//end if
}//end if
}//end if
if ($ignoring !== null && isset($this->ignoredLines[$this->tokens[$i]['line']]) === false) {
$this->ignoredLines[$this->tokens[$i]['line']] = $ignoring;
}
}//end for
// If annotations are being ignored, we clear out all the ignore rules
// but leave the annotations tokenized as normal.
if ($checkAnnotations === false) {
$this->ignoredLines = [];
}
}//end createPositionMap()
/**
* Replaces tabs in original token content with spaces.
*
* Each tab can represent between 1 and $config->tabWidth spaces,
* so this cannot be a straight string replace. The original content
* is placed into an orig_content index and the new token length is also
* set in the length index.
*
* @param array $token The token to replace tabs inside.
* @param string $prefix The character to use to represent the start of a tab.
* @param string $padding The character to use to represent the end of a tab.
* @param int $tabWidth The number of spaces each tab represents.
*
* @return void
*/
public function replaceTabsInToken(&$token, $prefix=' ', $padding=' ', $tabWidth=null)
{
$checkEncoding = false;
if (function_exists('iconv_strlen') === true) {
$checkEncoding = true;
}
$currColumn = $token['column'];
if ($tabWidth === null) {
$tabWidth = $this->config->tabWidth;
if ($tabWidth === 0) {
$tabWidth = 1;
}
}
if (rtrim($token['content'], "\t") === '') {
// String only contains tabs, so we can shortcut the process.
$numTabs = strlen($token['content']);
$firstTabSize = ($tabWidth - (($currColumn - 1) % $tabWidth));
$length = ($firstTabSize + ($tabWidth * ($numTabs - 1)));
$newContent = $prefix.str_repeat($padding, ($length - 1));
} else {
// We need to determine the length of each tab.
$tabs = explode("\t", $token['content']);
$numTabs = (count($tabs) - 1);
$tabNum = 0;
$newContent = '';
$length = 0;
foreach ($tabs as $content) {
if ($content !== '') {
$newContent .= $content;
if ($checkEncoding === true) {
// Not using the default encoding, so take a bit more care.
$oldLevel = error_reporting();
error_reporting(0);
$contentLength = iconv_strlen($content, $this->config->encoding);
error_reporting($oldLevel);
if ($contentLength === false) {
// String contained invalid characters, so revert to default.
$contentLength = strlen($content);
}
} else {
$contentLength = strlen($content);
}
$currColumn += $contentLength;
$length += $contentLength;
}
// The last piece of content does not have a tab after it.
if ($tabNum === $numTabs) {
break;
}
// Process the tab that comes after the content.
$lastCurrColumn = $currColumn;
$tabNum++;
// Move the pointer to the next tab stop.
if (($currColumn % $tabWidth) === 0) {
// This is the first tab, and we are already at a
// tab stop, so this tab counts as a single space.
$currColumn++;
} else {
$currColumn++;
while (($currColumn % $tabWidth) !== 0) {
$currColumn++;
}
$currColumn++;
}
$length += ($currColumn - $lastCurrColumn);
$newContent .= $prefix.str_repeat($padding, ($currColumn - $lastCurrColumn - 1));
}//end foreach
}//end if
$token['orig_content'] = $token['content'];
$token['content'] = $newContent;
$token['length'] = $length;
}//end replaceTabsInToken()
/**
* Creates a map of brackets positions.
*
* @return void
*/
private function createTokenMap()
{
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** START TOKEN MAP ***".PHP_EOL;
}
$squareOpeners = [];
$curlyOpeners = [];
$this->numTokens = count($this->tokens);
$openers = [];
$openOwner = null;
for ($i = 0; $i < $this->numTokens; $i++) {
/*
Parenthesis mapping.
*/
if (isset(Util\Tokens::$parenthesisOpeners[$this->tokens[$i]['code']]) === true) {
$this->tokens[$i]['parenthesis_opener'] = null;
$this->tokens[$i]['parenthesis_closer'] = null;
$this->tokens[$i]['parenthesis_owner'] = $i;
$openOwner = $i;
} else if ($this->tokens[$i]['code'] === T_OPEN_PARENTHESIS) {
$openers[] = $i;
$this->tokens[$i]['parenthesis_opener'] = $i;
if ($openOwner !== null) {
$this->tokens[$openOwner]['parenthesis_opener'] = $i;
$this->tokens[$i]['parenthesis_owner'] = $openOwner;
$openOwner = null;
}
} else if ($this->tokens[$i]['code'] === T_CLOSE_PARENTHESIS) {
// Did we set an owner for this set of parenthesis?
$numOpeners = count($openers);
if ($numOpeners !== 0) {
$opener = array_pop($openers);
if (isset($this->tokens[$opener]['parenthesis_owner']) === true) {
$owner = $this->tokens[$opener]['parenthesis_owner'];
$this->tokens[$owner]['parenthesis_closer'] = $i;
$this->tokens[$i]['parenthesis_owner'] = $owner;
}
$this->tokens[$i]['parenthesis_opener'] = $opener;
$this->tokens[$i]['parenthesis_closer'] = $i;
$this->tokens[$opener]['parenthesis_closer'] = $i;
}
}//end if
/*
Bracket mapping.
*/
switch ($this->tokens[$i]['code']) {
case T_OPEN_SQUARE_BRACKET:
$squareOpeners[] = $i;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", count($squareOpeners));
echo str_repeat("\t", count($curlyOpeners));
echo "=> Found square bracket opener at $i".PHP_EOL;
}
break;
case T_OPEN_CURLY_BRACKET:
if (isset($this->tokens[$i]['scope_closer']) === false) {
$curlyOpeners[] = $i;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", count($squareOpeners));
echo str_repeat("\t", count($curlyOpeners));
echo "=> Found curly bracket opener at $i".PHP_EOL;
}
}
break;
case T_CLOSE_SQUARE_BRACKET:
if (empty($squareOpeners) === false) {
$opener = array_pop($squareOpeners);
$this->tokens[$i]['bracket_opener'] = $opener;
$this->tokens[$i]['bracket_closer'] = $i;
$this->tokens[$opener]['bracket_opener'] = $opener;
$this->tokens[$opener]['bracket_closer'] = $i;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", count($squareOpeners));
echo str_repeat("\t", count($curlyOpeners));
echo "\t=> Found square bracket closer at $i for $opener".PHP_EOL;
}
}
break;
case T_CLOSE_CURLY_BRACKET:
if (empty($curlyOpeners) === false
&& isset($this->tokens[$i]['scope_opener']) === false
) {
$opener = array_pop($curlyOpeners);
$this->tokens[$i]['bracket_opener'] = $opener;
$this->tokens[$i]['bracket_closer'] = $i;
$this->tokens[$opener]['bracket_opener'] = $opener;
$this->tokens[$opener]['bracket_closer'] = $i;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", count($squareOpeners));
echo str_repeat("\t", count($curlyOpeners));
echo "\t=> Found curly bracket closer at $i for $opener".PHP_EOL;
}
}
break;
default:
continue 2;
}//end switch
}//end for
// Cleanup for any openers that we didn't find closers for.
// This typically means there was a syntax error breaking things.
foreach ($openers as $opener) {
unset($this->tokens[$opener]['parenthesis_opener']);
unset($this->tokens[$opener]['parenthesis_owner']);
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** END TOKEN MAP ***".PHP_EOL;
}
}//end createTokenMap()
/**
* Creates a map for the parenthesis tokens that surround other tokens.
*
* @return void
*/
private function createParenthesisNestingMap()
{
$map = [];
for ($i = 0; $i < $this->numTokens; $i++) {
if (isset($this->tokens[$i]['parenthesis_opener']) === true
&& $i === $this->tokens[$i]['parenthesis_opener']
) {
if (empty($map) === false) {
$this->tokens[$i]['nested_parenthesis'] = $map;
}
if (isset($this->tokens[$i]['parenthesis_closer']) === true) {
$map[$this->tokens[$i]['parenthesis_opener']]
= $this->tokens[$i]['parenthesis_closer'];
}
} else if (isset($this->tokens[$i]['parenthesis_closer']) === true
&& $i === $this->tokens[$i]['parenthesis_closer']
) {
array_pop($map);
if (empty($map) === false) {
$this->tokens[$i]['nested_parenthesis'] = $map;
}
} else {
if (empty($map) === false) {
$this->tokens[$i]['nested_parenthesis'] = $map;
}
}//end if
}//end for
}//end createParenthesisNestingMap()
/**
* Creates a scope map of tokens that open scopes.
*
* @return void
* @see recurseScopeMap()
*/
private function createScopeMap()
{
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** START SCOPE MAP ***".PHP_EOL;
}
for ($i = 0; $i < $this->numTokens; $i++) {
// Check to see if the current token starts a new scope.
if (isset($this->scopeOpeners[$this->tokens[$i]['code']]) === true) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokens[$i]['type'];
$content = Util\Common::prepareForOutput($this->tokens[$i]['content']);
echo "\tStart scope map at $i:$type => $content".PHP_EOL;
}
if (isset($this->tokens[$i]['scope_condition']) === true) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t* already processed, skipping *".PHP_EOL;
}
continue;
}
$i = $this->recurseScopeMap($i);
}//end if
}//end for
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t*** END SCOPE MAP ***".PHP_EOL;
}
}//end createScopeMap()
/**
* Recurses though the scope openers to build a scope map.
*
* @param int $stackPtr The position in the stack of the token that
* opened the scope (eg. an IF token or FOR token).
* @param int $depth How many scope levels down we are.
* @param int $ignore How many curly braces we are ignoring.
*
* @return int The position in the stack that closed the scope.
*/
private function recurseScopeMap($stackPtr, $depth=1, &$ignore=0)
{
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", $depth);
echo "=> Begin scope map recursion at token $stackPtr with depth $depth".PHP_EOL;
}
$opener = null;
$currType = $this->tokens[$stackPtr]['code'];
$startLine = $this->tokens[$stackPtr]['line'];
// We will need this to restore the value if we end up
// returning a token ID that causes our calling function to go back
// over already ignored braces.
$originalIgnore = $ignore;
// If the start token for this scope opener is the same as
// the scope token, we have already found our opener.
if (isset($this->scopeOpeners[$currType]['start'][$currType]) === true) {
$opener = $stackPtr;
}
for ($i = ($stackPtr + 1); $i < $this->numTokens; $i++) {
$tokenType = $this->tokens[$i]['code'];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokens[$i]['type'];
$line = $this->tokens[$i]['line'];
$content = Util\Common::prepareForOutput($this->tokens[$i]['content']);
echo str_repeat("\t", $depth);
echo "Process token $i on line $line [";
if ($opener !== null) {
echo "opener:$opener;";
}
if ($ignore > 0) {
echo "ignore=$ignore;";
}
echo "]: $type => $content".PHP_EOL;
}//end if
// Very special case for IF statements in PHP that can be defined without
// scope tokens. E.g., if (1) 1; 1 ? (1 ? 1 : 1) : 1;
// If an IF statement below this one has an opener but no
// keyword, the opener will be incorrectly assigned to this IF statement.
// The same case also applies to USE statements, which don't have to have
// openers, so a following USE statement can cause an incorrect brace match.
if (($currType === T_IF || $currType === T_ELSE || $currType === T_USE)
&& $opener === null
&& ($this->tokens[$i]['code'] === T_SEMICOLON
|| $this->tokens[$i]['code'] === T_CLOSE_TAG)
) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokens[$stackPtr]['type'];
echo str_repeat("\t", $depth);
if ($this->tokens[$i]['code'] === T_SEMICOLON) {
$closerType = 'semicolon';
} else {
$closerType = 'close tag';
}
echo "=> Found $closerType before scope opener for $stackPtr:$type, bailing".PHP_EOL;
}
return $i;
}
// Special case for PHP control structures that have no braces.
// If we find a curly brace closer before we find the opener,
// we're not going to find an opener. That closer probably belongs to
// a control structure higher up.
if ($opener === null
&& $ignore === 0
&& $tokenType === T_CLOSE_CURLY_BRACKET
&& isset($this->scopeOpeners[$currType]['end'][$tokenType]) === true
) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokens[$stackPtr]['type'];
echo str_repeat("\t", $depth);
echo "=> Found curly brace closer before scope opener for $stackPtr:$type, bailing".PHP_EOL;
}
return ($i - 1);
}
if ($opener !== null
&& (isset($this->tokens[$i]['scope_opener']) === false
|| $this->scopeOpeners[$this->tokens[$stackPtr]['code']]['shared'] === true)
&& isset($this->scopeOpeners[$currType]['end'][$tokenType]) === true
) {
if ($ignore > 0 && $tokenType === T_CLOSE_CURLY_BRACKET) {
// The last opening bracket must have been for a string
// offset or alike, so let's ignore it.
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", $depth);
echo '* finished ignoring curly brace *'.PHP_EOL;
}
$ignore--;
continue;
} else if ($this->tokens[$opener]['code'] === T_OPEN_CURLY_BRACKET
&& $tokenType !== T_CLOSE_CURLY_BRACKET
) {
// The opener is a curly bracket so the closer must be a curly bracket as well.
// We ignore this closer to handle cases such as T_ELSE or T_ELSEIF being considered
// a closer of T_IF when it should not.
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokens[$stackPtr]['type'];
echo str_repeat("\t", $depth);
echo "=> Ignoring non-curly scope closer for $stackPtr:$type".PHP_EOL;
}
} else {
$scopeCloser = $i;
$todo = [
$stackPtr,
$opener,
];
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$type = $this->tokens[$stackPtr]['type'];
$closerType = $this->tokens[$scopeCloser]['type'];
echo str_repeat("\t", $depth);
echo "=> Found scope closer ($scopeCloser:$closerType) for $stackPtr:$type".PHP_EOL;
}
$validCloser = true;
if (($this->tokens[$stackPtr]['code'] === T_IF || $this->tokens[$stackPtr]['code'] === T_ELSEIF)
&& ($tokenType === T_ELSE || $tokenType === T_ELSEIF)
) {
// To be a closer, this token must have an opener.
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", $depth);
echo "* closer needs to be tested *".PHP_EOL;
}
$i = self::recurseScopeMap($i, ($depth + 1), $ignore);
if (isset($this->tokens[$scopeCloser]['scope_opener']) === false) {
$validCloser = false;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", $depth);
echo "* closer is not valid (no opener found) *".PHP_EOL;
}
} else if ($this->tokens[$this->tokens[$scopeCloser]['scope_opener']]['code'] !== $this->tokens[$opener]['code']) {
$validCloser = false;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo str_repeat("\t", $depth);
$type = $this->tokens[$this->tokens[$scopeCloser]['scope_opener']]['type'];