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Fixer.php
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Fixer.php
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<?php
/**
* A helper class for fixing errors.
*
* PHP version 5
*
* @category PHP
* @package PHP_CodeSniffer
* @author Greg Sherwood <gsherwood@squiz.net>
* @copyright 2006-2012 Squiz Pty Ltd (ABN 77 084 670 600)
* @license https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
* @link http://pear.php.net/package/PHP_CodeSniffer
*/
/**
* A helper class for fixing errors.
*
* Provides helper functions that act upon a token array and modify the file
* content.
*
* @category PHP
* @package PHP_CodeSniffer
* @author Greg Sherwood <gsherwood@squiz.net>
* @copyright 2006-2012 Squiz Pty Ltd (ABN 77 084 670 600)
* @license https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
* @version Release: @package_version@
* @link http://pear.php.net/package/PHP_CodeSniffer
*/
class PHP_CodeSniffer_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 file being fixed.
*
* @var PHP_CodeSniffer_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 = array();
/**
* 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 array(int)
*/
private $_fixedTokens = array();
/**
* 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 = array();
/**
* Is there an open changeset.
*
* @var boolean
*/
private $_inChangeset = false;
/**
* The number of fixes that have been performed.
*
* @var int
*/
private $_numFixes = 0;
/**
* Starts fixing a new file.
*
* @param PHP_CodeSniffer_File $phpcsFile The file being fixed.
*
* @return void
*/
public function startFile($phpcsFile)
{
$this->_currentFile = $phpcsFile;
$this->_numFixes = 0;
$this->_fixedTokens = array();
$tokens = $phpcsFile->getTokens();
$this->_tokens = array();
foreach ($tokens as $index => $token) {
$this->_tokens[$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;
$loops = 0;
while ($loops < 50) {
ob_start();
// Only needed once file content has changed.
$contents = $this->getContents();
/*
Useful for debugging fixed contents.
@ob_end_clean();
$debugContent = str_replace("\n", "\033[30;1m\\n\n\033[0m", $contents);
$debugContent = str_replace("\t", "\033[30;1m»\t\033[0m", $debugContent);
$debugContent = str_replace(' ', "\033[30;1m·\033[0m", $debugContent);
echo $debugContent;
*/
$this->_currentFile->refreshTokenListeners();
$this->_currentFile->start($contents);
ob_end_clean();
/*
Possibly useful as a fail-safe, but may mask problems with the actual
fixes being performed.
$newContents = $this->getContents();
if ($newContents === $contents) {
break;
}
*/
$loops++;
if ($this->_numFixes === 0) {
// Nothing left to do.
break;
} else if (PHP_CODESNIFFER_VERBOSITY > 1) {
echo "\t* fixed $this->_numFixes violations, starting over *".PHP_EOL;
}
}//end while
$this->enabled = false;
if ($this->_numFixes > 0) {
if (PHP_CODESNIFFER_VERBOSITY > 1) {
@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.
*
* @return string
*/
public function generateDiff()
{
$cwd = getcwd().DIRECTORY_SEPARATOR;
$filename = str_replace($cwd, '', $this->_currentFile->getFilename());
$fixedFile = $cwd.'phpcs-fixed.tmp';
$contents = $this->getContents();
file_put_contents($fixedFile, $contents);
// We must use something like shell_exec() because whitespace at the end
// of lines is critical to diff files.
$cmd = "diff -u -L\"$filename\" -LPHP_CodeSniffer \"$filename\" \"$fixedFile\"";
$diff = shell_exec($cmd);
unlink($fixedFile);
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 (PHP_CODESNIFFER_VERBOSITY > 1) {
$bt = debug_backtrace();
$sniff = $bt[1]['class'];
$line = $bt[0]['line'];
@ob_end_clean();
echo "\t=> Changeset started by $sniff (line $line)".PHP_EOL;
ob_start();
}
$this->_changeset = array();
$this->_inChangeset = true;
}//end beginChangeset()
/**
* Stop recording actions for a changeset, and apply logged changes.
*
* @return boolean
*/
public function endChangeset()
{
$this->_inChangeset = false;
$errors = array_intersect(array_keys($this->_changeset), array_keys($this->_fixedTokens));
if (empty($errors) === false) {
// At least one change cannot be applied.
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$fixes = count($this->_changeset);
$fails = count($errors);
@ob_end_clean();
echo "\t=> Changeset could not be applied: $fails of $fixes changes would not apply".PHP_EOL;
ob_start();
}
$this->_changeset = array();
return false;
}
foreach ($this->_changeset as $stackPtr => $content) {
$this->replaceToken($stackPtr, $content);
}
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 = array();
}//end endChangeset()
/**
* Replace the entire contents of a token.
*
* @param int $stackPtr The position of the token in the token stack.
* @param string $content The new content of the token.
*
* @return void
*/
public function replaceToken($stackPtr, $content)
{
if ($this->_inChangeset === false
&& isset($this->_fixedTokens[$stackPtr]) === true
) {
return;
}
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'];
}
$tokens = $this->_currentFile->getTokens();
$type = $tokens[$stackPtr]['type'];
$oldContent = str_replace($this->_currentFile->eolChar, "\033[30;1m\\n\033[0m", $tokens[$stackPtr]['content']);
$newContent = str_replace($this->_currentFile->eolChar, "\033[30;1m\\n\033[0m", $content);
$oldContent = str_replace(' ', "\033[30;1m·\033[0m", $oldContent);
$newContent = str_replace(' ', "\033[30;1m·\033[0m", $newContent);
}
if ($this->_inChangeset === true) {
$this->_changeset[$stackPtr] = $content;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
@ob_end_clean();
echo "\t\tQ: $sniff (line $line) replaced token $stackPtr ($type) \"$oldContent\" => \"$newContent\"".PHP_EOL;
ob_start();
}
return;
}
$this->_tokens[$stackPtr] = $content;
$this->_numFixes++;
$this->_fixedTokens[$stackPtr] = true;
if (PHP_CODESNIFFER_VERBOSITY > 1) {
$indent = "\t";
if (empty($this->_changeset) === false) {
$indent .= "\tA: ";
}
@ob_end_clean();
echo "$indent$sniff (line $line) replaced token $stackPtr ($type) \"$oldContent\" => \"$newContent\"".PHP_EOL;
ob_start();
}
}//end replaceToken()
/**
* 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 chacters to keep. If NULL, the content of
* the token from $start to the end of the content is kept.
*
* @return void
*/
public function substrToken($stackPtr, $start, $length=null)
{
$current = $this->getTokenContent($stackPtr);
if ($length === null) {
$newContent = substr($current, $start);
} else {
$newContent = substr($current, $start, $length);
}
$this->replaceToken($stackPtr, $newContent);
}//end substrToken()
/**
* Adds a newline to end of a token's content.
*
* @param int $stackPtr The position of the token in the token stack.
*
* @return void
*/
public function addNewline($stackPtr)
{
$current = $this->getTokenContent($stackPtr);
$this->replaceToken($stackPtr, $current.$this->_currentFile->eolChar);
}//end addNewline()
/**
* Adds a newline to the start of a token's content.
*
* @param int $stackPtr The position of the token in the token stack.
*
* @return void
*/
public function addNewlineBefore($stackPtr)
{
$current = $this->getTokenContent($stackPtr);
$this->replaceToken($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 $content The content to add.
*
* @return void
*/
public function addContent($stackPtr, $content)
{
$current = $this->getTokenContent($stackPtr);
$this->replaceToken($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 $content The content to add.
*
* @return void
*/
public function addContentBefore($stackPtr, $content)
{
$current = $this->getTokenContent($stackPtr);
$this->replaceToken($stackPtr, $content.$current);
}//end addContentBefore()
}//end class