File "Fixer.php"
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<?php
/**
* A helper class for fixing errors.
*
* Provides helper functions that act upon a token array and modify the file
* content.
*
* @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;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Util\Common;
class Fixer
{
/**
* Is the fixer enabled and fixing a file?
*
* Sniffs should check this value to ensure they are not
* doing extra processing to prepare for a fix when fixing is
* not required.
*
* @var boolean
*/
public $enabled = false;
/**
* The number of times we have looped over a file.
*
* @var integer
*/
public $loops = 0;
/**
* The file being fixed.
*
* @var \PHP_CodeSniffer\Files\File
*/
private $currentFile = null;
/**
* The list of tokens that make up the file contents.
*
* This is a simplified list which just contains the token content and nothing
* else. This is the array that is updated as fixes are made, not the file's
* token array. Imploding this array will give you the file content back.
*
* @var array<int, string>
*/
private $tokens = [];
/**
* A list of tokens that have already been fixed.
*
* We don't allow the same token to be fixed more than once each time
* through a file as this can easily cause conflicts between sniffs.
*
* @var int[]
*/
private $fixedTokens = [];
/**
* The last value of each fixed token.
*
* If a token is being "fixed" back to its last value, the fix is
* probably conflicting with another.
*
* @var array<int, string>
*/
private $oldTokenValues = [];
/**
* A list of tokens that have been fixed during a changeset.
*
* All changes in changeset must be able to be applied, or else
* the entire changeset is rejected.
*
* @var array
*/
private $changeset = [];
/**
* Is there an open changeset.
*
* @var boolean
*/
private $inChangeset = false;
/**
* Is the current fixing loop in conflict?
*
* @var boolean
*/
private $inConflict = false;
/**
* The number of fixes that have been performed.
*
* @var integer
*/
private $numFixes = 0;
/**
* Starts fixing a new file.
*
* @param \PHP_CodeSniffer\Files\File $phpcsFile The file being fixed.
*
* @return void
*/
public function startFile(File $phpcsFile)
{
$this->currentFile = $phpcsFile;
$this->numFixes = 0;
$this->fixedTokens = [];
$tokens = $phpcsFile->getTokens();
$this->tokens = [];
foreach ($tokens as $index => $token) {
if (isset($token['orig_content']) === true) {
$this->tokens[$index] = $token['orig_content'];
} else {
$this->tokens[$index] = $token['content'];
}
}
}//end startFile()
/**
* Attempt to fix the file by processing it until no fixes are made.
*
* @return boolean
*/
public function fixFile()
{
$fixable = $this->currentFile->getFixableCount();
if ($fixable === 0) {
// Nothing to fix.
return false;
}
$this->enabled = true;
$this->loops = 0;
while ($this->loops < 50) {
ob_start();
// Only needed once file content has changed.
$contents = $this->getContents();
if (PHP_CODESNIFFER_VERBOSITY > 2) {
@ob_end_clean();
echo '---START FILE CONTENT---'.PHP_EOL;
$lines = explode($this->currentFile->eolChar, $contents);
$max = strlen(count($lines));
foreach ($lines as $lineNum => $line) {
$lineNum++;
echo str_pad($lineNum, $max, ' ', STR_PAD_LEFT).'|'.$line.PHP_EOL;
}
echo '--- END FILE CONTENT ---'.PHP_EOL;
ob_start();
}
$this->inConflict = false;
$this->currentFile->ruleset->populateTokenListeners();
$this->currentFile->setContent($contents);
$this->currentFile->process();
ob_end_clean();
$this->loops++;
if (PHP_CODESNIFFER_CBF === true && PHP_CODESNIFFER_VERBOSITY > 0) {
echo "\r".str_repeat(' ', 80)."\r";
echo "\t=> Fixing file: $this->numFixes/$fixable violations remaining [made $this->loops pass";
if ($this->loops > 1) {
echo 'es';
}
echo ']... ';
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo PHP_EOL;
}
}
if ($this->numFixes === 0 && $this->inConflict === false) {
// Nothing left to do.
break;
} else if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t* fixed $this->numFixes violations, starting loop ".($this->loops + 1).' *'.PHP_EOL;
}
}//end while
$this->enabled = false;
if ($this->numFixes > 0) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
if (ob_get_level() > 0) {
ob_end_clean();
}
echo "\t*** Reached maximum number of loops with $this->numFixes violations left unfixed ***".PHP_EOL;
ob_start();
}
return false;
}
return true;
}//end fixFile()
/**
* Generates a text diff of the original file and the new content.
*
* @param string $filePath Optional file path to diff the file against.
* If not specified, the original version of the
* file will be used.
* @param boolean $colors Print coloured output or not.
*
* @return string
*/
public function generateDiff($filePath=null, $colors=true)
{
if ($filePath === null) {
$filePath = $this->currentFile->getFilename();
}
$cwd = getcwd().DIRECTORY_SEPARATOR;
if (strpos($filePath, $cwd) === 0) {
$filename = substr($filePath, strlen($cwd));
} else {
$filename = $filePath;
}
$contents = $this->getContents();
$tempName = tempnam(sys_get_temp_dir(), 'phpcs-fixer');
$fixedFile = fopen($tempName, 'w');
fwrite($fixedFile, $contents);
// We must use something like shell_exec() because whitespace at the end
// of lines is critical to diff files.
$filename = escapeshellarg($filename);
$cmd = "diff -u -L$filename -LPHP_CodeSniffer $filename \"$tempName\"";
$diff = shell_exec($cmd);
fclose($fixedFile);
if (is_file($tempName) === true) {
unlink($tempName);
}
if ($diff === null) {
return '';
}
if ($colors === false) {
return $diff;
}
$diffLines = explode(PHP_EOL, $diff);
if (count($diffLines) === 1) {
// Seems to be required for cygwin.
$diffLines = explode("\n", $diff);
}
$diff = [];
foreach ($diffLines as $line) {
if (isset($line[0]) === true) {
switch ($line[0]) {
case '-':
$diff[] = "\033[31m$line\033[0m";
break;
case '+':
$diff[] = "\033[32m$line\033[0m";
break;
default:
$diff[] = $line;
}
}
}
$diff = implode(PHP_EOL, $diff);
return $diff;
}//end generateDiff()
/**
* Get a count of fixes that have been performed on the file.
*
* This value is reset every time a new file is started, or an existing
* file is restarted.
*
* @return int
*/
public function getFixCount()
{
return $this->numFixes;
}//end getFixCount()
/**
* Get the current content of the file, as a string.
*
* @return string
*/
public function getContents()
{
$contents = implode($this->tokens);
return $contents;
}//end getContents()
/**
* Get the current fixed content of a token.
*
* This function takes changesets into account so should be used
* instead of directly accessing the token array.
*
* @param int $stackPtr The position of the token in the token stack.
*
* @return string
*/
public function getTokenContent($stackPtr)
{
if ($this->inChangeset === true
&& isset($this->changeset[$stackPtr]) === true
) {
return $this->changeset[$stackPtr];
} else {
return $this->tokens[$stackPtr];
}
}//end getTokenContent()
/**
* Start recording actions for a changeset.
*
* @return void
*/
public function beginChangeset()
{
if ($this->inConflict === true) {
return false;
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$bt = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
if ($bt[1]['class'] === __CLASS__) {
$sniff = 'Fixer';
} else {
$sniff = Util\Common::getSniffCode($bt[1]['class']);
}
$line = $bt[0]['line'];
@ob_end_clean();
echo "\t=> Changeset started by $sniff:$line".PHP_EOL;
ob_start();
}
$this->changeset = [];
$this->inChangeset = true;
}//end beginChangeset()
/**
* Stop recording actions for a changeset, and apply logged changes.
*
* @return boolean
*/
public function endChangeset()
{
if ($this->inConflict === true) {
return false;
}
$this->inChangeset = false;
$success = true;
$applied = [];
foreach ($this->changeset as $stackPtr => $content) {
$success = $this->replaceToken($stackPtr, $content);
if ($success === false) {
break;
} else {
$applied[] = $stackPtr;
}
}
if ($success === false) {
// Rolling back all changes.
foreach ($applied as $stackPtr) {
$this->revertToken($stackPtr);
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
@ob_end_clean();
echo "\t=> Changeset failed to apply".PHP_EOL;
ob_start();
}
} else if (PHP_CODESNIFFER_VERBOSITY > 1) {
$fixes = count($this->changeset);
@ob_end_clean();
echo "\t=> Changeset ended: $fixes changes applied".PHP_EOL;
ob_start();
}
$this->changeset = [];
return true;
}//end endChangeset()
/**
* Stop recording actions for a changeset, and discard logged changes.
*
* @return void
*/
public function rollbackChangeset()
{
$this->inChangeset = false;
$this->inConflict = false;
if (empty($this->changeset) === false) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$bt = debug_backtrace();
if ($bt[1]['class'] === 'PHP_CodeSniffer\Fixer') {
$sniff = $bt[2]['class'];
$line = $bt[1]['line'];
} else {
$sniff = $bt[1]['class'];
$line = $bt[0]['line'];
}
$sniff = Util\Common::getSniffCode($sniff);
$numChanges = count($this->changeset);
@ob_end_clean();
echo "\t\tR: $sniff:$line rolled back the changeset ($numChanges changes)".PHP_EOL;
echo "\t=> Changeset rolled back".PHP_EOL;
ob_start();
}
$this->changeset = [];
}//end if
}//end rollbackChangeset()
/**
* Replace the entire contents of a token.
*
* @param int $stackPtr The position of the token in the token stack.
* @param string $content The new content of the token.
*
* @return bool If the change was accepted.
*/
public function replaceToken($stackPtr, $content)
{
if ($this->inConflict === true) {
return false;
}
if ($this->inChangeset === false
&& isset($this->fixedTokens[$stackPtr]) === true
) {
$indent = "\t";
if (empty($this->changeset) === false) {
$indent .= "\t";
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
@ob_end_clean();
echo "$indent* token $stackPtr has already been modified, skipping *".PHP_EOL;
ob_start();
}
return false;
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$bt = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
if ($bt[1]['class'] === 'PHP_CodeSniffer\Fixer') {
$sniff = $bt[2]['class'];
$line = $bt[1]['line'];
} else {
$sniff = $bt[1]['class'];
$line = $bt[0]['line'];
}
$sniff = Util\Common::getSniffCode($sniff);
$tokens = $this->currentFile->getTokens();
$type = $tokens[$stackPtr]['type'];
$tokenLine = $tokens[$stackPtr]['line'];
$oldContent = Common::prepareForOutput($this->tokens[$stackPtr]);
$newContent = Common::prepareForOutput($content);
if (trim($this->tokens[$stackPtr]) === '' && isset($this->tokens[($stackPtr + 1)]) === true) {
// Add some context for whitespace only changes.
$append = Common::prepareForOutput($this->tokens[($stackPtr + 1)]);
$oldContent .= $append;
$newContent .= $append;
}
}//end if
if ($this->inChangeset === true) {
$this->changeset[$stackPtr] = $content;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
@ob_end_clean();
echo "\t\tQ: $sniff:$line replaced token $stackPtr ($type on line $tokenLine) \"$oldContent\" => \"$newContent\"".PHP_EOL;
ob_start();
}
return true;
}
if (isset($this->oldTokenValues[$stackPtr]) === false) {
$this->oldTokenValues[$stackPtr] = [
'curr' => $content,
'prev' => $this->tokens[$stackPtr],
'loop' => $this->loops,
];
} else {
if ($this->oldTokenValues[$stackPtr]['prev'] === $content
&& $this->oldTokenValues[$stackPtr]['loop'] === ($this->loops - 1)
) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$indent = "\t";
if (empty($this->changeset) === false) {
$indent .= "\t";
}
$loop = $this->oldTokenValues[$stackPtr]['loop'];
@ob_end_clean();
echo "$indent**** $sniff:$line has possible conflict with another sniff on loop $loop; caused by the following change ****".PHP_EOL;
echo "$indent**** replaced token $stackPtr ($type on line $tokenLine) \"$oldContent\" => \"$newContent\" ****".PHP_EOL;
}
if ($this->oldTokenValues[$stackPtr]['loop'] >= ($this->loops - 1)) {
$this->inConflict = true;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "$indent**** ignoring all changes until next loop ****".PHP_EOL;
}
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
ob_start();
}
return false;
}//end if
$this->oldTokenValues[$stackPtr]['prev'] = $this->oldTokenValues[$stackPtr]['curr'];
$this->oldTokenValues[$stackPtr]['curr'] = $content;
$this->oldTokenValues[$stackPtr]['loop'] = $this->loops;
}//end if
$this->fixedTokens[$stackPtr] = $this->tokens[$stackPtr];
$this->tokens[$stackPtr] = $content;
$this->numFixes++;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$indent = "\t";
if (empty($this->changeset) === false) {
$indent .= "\tA: ";
}
if (ob_get_level() > 0) {
ob_end_clean();
}
echo "$indent$sniff:$line replaced token $stackPtr ($type on line $tokenLine) \"$oldContent\" => \"$newContent\"".PHP_EOL;
ob_start();
}
return true;
}//end replaceToken()
/**
* Reverts the previous fix made to a token.
*
* @param int $stackPtr The position of the token in the token stack.
*
* @return bool If a change was reverted.
*/
public function revertToken($stackPtr)
{
if (isset($this->fixedTokens[$stackPtr]) === false) {
return false;
}
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$bt = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
if ($bt[1]['class'] === 'PHP_CodeSniffer\Fixer') {
$sniff = $bt[2]['class'];
$line = $bt[1]['line'];
} else {
$sniff = $bt[1]['class'];
$line = $bt[0]['line'];
}
$sniff = Util\Common::getSniffCode($sniff);
$tokens = $this->currentFile->getTokens();
$type = $tokens[$stackPtr]['type'];
$tokenLine = $tokens[$stackPtr]['line'];
$oldContent = Common::prepareForOutput($this->tokens[$stackPtr]);
$newContent = Common::prepareForOutput($this->fixedTokens[$stackPtr]);
if (trim($this->tokens[$stackPtr]) === '' && isset($tokens[($stackPtr + 1)]) === true) {
// Add some context for whitespace only changes.
$append = Common::prepareForOutput($this->tokens[($stackPtr + 1)]);
$oldContent .= $append;
$newContent .= $append;
}
}//end if
$this->tokens[$stackPtr] = $this->fixedTokens[$stackPtr];
unset($this->fixedTokens[$stackPtr]);
$this->numFixes--;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$indent = "\t";
if (empty($this->changeset) === false) {
$indent .= "\tR: ";
}
@ob_end_clean();
echo "$indent$sniff:$line reverted token $stackPtr ($type on line $tokenLine) \"$oldContent\" => \"$newContent\"".PHP_EOL;
ob_start();
}
return true;
}//end revertToken()
/**
* Replace the content of a token with a part of its current content.
*
* @param int $stackPtr The position of the token in the token stack.
* @param int $start The first character to keep.
* @param int $length The number of characters to keep. If NULL, the content of
* the token from $start to the end of the content is kept.
*
* @return bool If the change was accepted.
*/
public function substrToken($stackPtr, $start, $length=null)
{
$current = $this->getTokenContent($stackPtr);
if ($length === null) {
$newContent = substr($current, $start);
} else {
$newContent = substr($current, $start, $length);
}
return $this->replaceToken($stackPtr, $newContent);
}//end substrToken()
/**
* Adds a newline to end of a token's content.
*
* @param int $stackPtr The position of the token in the token stack.
*
* @return bool If the change was accepted.
*/
public function addNewline($stackPtr)
{
$current = $this->getTokenContent($stackPtr);
return $this->replaceToken($stackPtr, $current.$this->currentFile->eolChar);
}//end addNewline()
/**
* Adds a newline to the start of a token's content.
*
* @param int $stackPtr The position of the token in the token stack.
*
* @return bool If the change was accepted.
*/
public function addNewlineBefore($stackPtr)
{
$current = $this->getTokenContent($stackPtr);
return $this->replaceToken($stackPtr, $this->currentFile->eolChar.$current);
}//end addNewlineBefore()
/**
* Adds content to the end of a token's current content.
*
* @param int $stackPtr The position of the token in the token stack.
* @param string $content The content to add.
*
* @return bool If the change was accepted.
*/
public function addContent($stackPtr, $content)
{
$current = $this->getTokenContent($stackPtr);
return $this->replaceToken($stackPtr, $current.$content);
}//end addContent()
/**
* Adds content to the start of a token's current content.
*
* @param int $stackPtr The position of the token in the token stack.
* @param string $content The content to add.
*
* @return bool If the change was accepted.
*/
public function addContentBefore($stackPtr, $content)
{
$current = $this->getTokenContent($stackPtr);
return $this->replaceToken($stackPtr, $content.$current);
}//end addContentBefore()
/**
* Adjust the indent of a code block.
*
* @param int $start The position of the token in the token stack
* to start adjusting the indent from.
* @param int $end The position of the token in the token stack
* to end adjusting the indent.
* @param int $change The number of spaces to adjust the indent by
* (positive or negative).
*
* @return void
*/
public function changeCodeBlockIndent($start, $end, $change)
{
$tokens = $this->currentFile->getTokens();
$baseIndent = '';
if ($change > 0) {
$baseIndent = str_repeat(' ', $change);
}
$useChangeset = false;
if ($this->inChangeset === false) {
$this->beginChangeset();
$useChangeset = true;
}
for ($i = $start; $i <= $end; $i++) {
if ($tokens[$i]['column'] !== 1
|| $tokens[($i + 1)]['line'] !== $tokens[$i]['line']
) {
continue;
}
$length = 0;
if ($tokens[$i]['code'] === T_WHITESPACE
|| $tokens[$i]['code'] === T_DOC_COMMENT_WHITESPACE
) {
$length = $tokens[$i]['length'];
$padding = ($length + $change);
if ($padding > 0) {
$padding = str_repeat(' ', $padding);
} else {
$padding = '';
}
$newContent = $padding.ltrim($tokens[$i]['content']);
} else {
$newContent = $baseIndent.$tokens[$i]['content'];
}
$this->replaceToken($i, $newContent);
}//end for
if ($useChangeset === true) {
$this->endChangeset();
}
}//end changeCodeBlockIndent()
}//end class