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Code Editor : AbstractScopeSniff.php

<?php
/**
 * An AbstractScopeTest allows for tests that extend from this class to
 * listen for tokens within a particluar scope.
 *
 * PHP version 5
 *
 * @category  PHP
 * @package   PHP_CodeSniffer
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @author    Marc McIntyre <mmcintyre@squiz.net>
 * @copyright 2006-2011 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
 * @link      http://pear.php.net/package/PHP_CodeSniffer
 */

/**
 * An AbstractScopeTest allows for tests that extend from this class to
 * listen for tokens within a particluar scope.
 *
 * Below is a test that listens to methods that exist only within classes:
 * <code>
 * class ClassScopeTest extends PHP_CodeSniffer_Standards_AbstractScopeSniff
 * {
 *     public function __construct()
 *     {
 *         parent::__construct(array(T_CLASS), array(T_FUNCTION));
 *     }
 *
 *     protected function processTokenWithinScope(PHP_CodeSniffer_File $phpcsFile, $)
 *     {
 *         $className = $phpcsFile->getDeclarationName($currScope);
 *         echo 'encountered a method within class '.$className;
 *     }
 * }
 * </code>
 *
 * @category  PHP
 * @package   PHP_CodeSniffer
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @author    Marc McIntyre <mmcintyre@squiz.net>
 * @copyright 2006-2011 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
 * @version   Release: 1.3.3
 * @link      http://pear.php.net/package/PHP_CodeSniffer
 */
abstract class PHP_CodeSniffer_Standards_AbstractScopeSniff implements PHP_CodeSniffer_Sniff
{

/**
     * The token types that this test wishes to listen to within the scope.
     *
     * @var array()
     */
    private $_tokens = array();

/**
     * The type of scope opener tokens that this test wishes to listen to.
     *
     * @var string
     */
    private $_scopeTokens = array();

/**
     * The position in the tokens array that opened the current scope.
     *
     * @var array()
     */
    protected $currScope = null;

/**
     * The current file being checked.
     *
     * @var string
     */
    protected $currFile = '';

/**
     * True if this test should fire on tokens outside of the scope.
     *
     * @var boolean
     */
    private $_listenOutside = false;

/**
     * Constructs a new AbstractScopeTest.
     *
     * @param array   $scopeTokens   The type of scope the test wishes to listen to.
     * @param array   $tokens        The tokens that the test wishes to listen to
     *                               within the scope.
     * @param boolean $listenOutside If true this test will also alert the
     *                               extending class when a token is found outside
     *                               the scope, by calling the
     *                               processTokenOutideScope method.
     *
     * @see PHP_CodeSniffer.getValidScopeTokeners()
     * @throws PHP_CodeSniffer_Test_Exception If the specified tokens array is empty.
     */
    public function __construct(
        array $scopeTokens,
        array $tokens,
        $listenOutside=false
    ) {
        if (empty($scopeTokens) === true) {
            $error = 'The scope tokens list cannot be empty';
            throw new PHP_CodeSniffer_Test_Exception($error);
        }

if (empty($tokens) === true) {
            $error = 'The tokens list cannot be empty';
            throw new PHP_CodeSniffer_Test_Exception($error);
        }

$invalidScopeTokens = array_intersect($scopeTokens, $tokens);
        if (empty($invalidScopeTokens) === false) {
            $invalid = implode(', ', $invalidScopeTokens);
            $error   = "Scope tokens [$invalid] cant be in the tokens array";
            throw new PHP_CodeSniffer_Test_Exception($error);
        }

$this->_listenOutside = $listenOutside;
        $this->_scopeTokens   = $scopeTokens;
        $this->_tokens        = $tokens;

}//end __construct()

/**
     * The method that is called to register the tokens this test wishes to
     * listen to.
     *
     * DO NOT OVERRIDE THIS METHOD. Use the constructor of this class to register
     * for the desired tokens and scope.
     *
     * @return array(int)
     * @see __constructor()
     */
    public final function register()
    {
        if ($this->_listenOutside === false) {
            return $this->_scopeTokens;
        } else {
            return array_merge($this->_scopeTokens, $this->_tokens);
        }

}//end register()

/**
     * Processes the tokens that this test is listening for.
     *
     * @param PHP_CodeSniffer_File $phpcsFile The file where this token was found.
     * @param int                  $stackPtr  The position in the stack where this
     *                                        token was found.
     *
     * @return void
     * @see processTokenWithinScope()
     */
    public final function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
    {
        $file = $phpcsFile->getFilename();
        if ($this->currFile !== $file) {
            // We have changed files, so clean up.
            $this->currScope = null;
            $this->currFile  = $file;
        }

$tokens = $phpcsFile->getTokens();

if (in_array($tokens[$stackPtr]['code'], $this->_scopeTokens) === true) {
            $this->currScope = $stackPtr;
            $phpcsFile->addTokenListener($this, $this->_tokens);
        } else if ($this->currScope !== null
            && isset($tokens[$this->currScope]['scope_closer']) === true
            && $stackPtr > $tokens[$this->currScope]['scope_closer']
        ) {
            $this->currScope = null;
            if ($this->_listenOutside === true) {
                // This is a token outside the current scope, so notify the
                // extender as they wish to know about this.
                $this->processTokenOutsideScope($phpcsFile, $stackPtr);
            } else {
                // Don't remove the listener if the extender wants to know about
                // tokens that live outside the current scope.
                $phpcsFile->removeTokenListener($this, $this->_tokens);
            }
        } else if ($this->currScope !== null) {
            $this->processTokenWithinScope($phpcsFile, $stackPtr, $this->currScope);
        } else {
            $this->processTokenOutsideScope($phpcsFile, $stackPtr);
        }

}//end process()

/**
     * Processes a token that is found within the scope that this test is
     * listening to.
     *
     * @param PHP_CodeSniffer_File $phpcsFile The file where this token was found.
     * @param int                  $stackPtr  The position in the stack where this
     *                                        token was found.
     * @param int                  $currScope The position in the tokens array that
     *                                        opened the scope that this test is
     *                                        listening for.
     *
     * @return void
     */
    protected abstract function processTokenWithinScope(
        PHP_CodeSniffer_File $phpcsFile,
        $stackPtr,
        $currScope
    );

/**
     * Processes a token that is found within the scope that this test is
     * listening to.
     *
     * @param PHP_CodeSniffer_File $phpcsFile The file where this token was found.
     * @param int                  $stackPtr  The position in the stack where this
     *                                        token was found.
     *
     * @return void
     */
    protected function processTokenOutsideScope(
        PHP_CodeSniffer_File $phpcsFile,
        $stackPtr
    ) {
        return;

}//end processTokenOutsideScope()

}//end class

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Code Editor : AbstractScopeSniff.php