nicolasconnault
719 lines
30 KiB
PHP
719 lines
30 KiB
PHP
<?php
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/**
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* Tokenizes JS code.
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*
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* PHP version 5
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*
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* @category PHP
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* @package PHP_CodeSniffer
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* @author Greg Sherwood <gsherwood@squiz.net>
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* @author Marc McIntyre <mmcintyre@squiz.net>
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* @copyright 2006 Squiz Pty Ltd (ABN 77 084 670 600)
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* @license http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
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* @version CVS: $Id$
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* @link http://pear.php.net/package/PHP_CodeSniffer
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*/
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/**
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* Tokenizes JS code.
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*
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* @category PHP
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* @package PHP_CodeSniffer
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* @author Greg Sherwood <gsherwood@squiz.net>
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* @copyright 2006 Squiz Pty Ltd (ABN 77 084 670 600)
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* @license http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
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* @version Release: 1.1.0
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* @link http://pear.php.net/package/PHP_CodeSniffer
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*/
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class PHP_CodeSniffer_Tokenizers_JS
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{
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/**
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* A list of tokens that are allowed to open a scope.
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*
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* This array also contains information about what kind of token the scope
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* opener uses to open and close the scope, if the token strictly requires
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* an opener, if the token can share a scope closer, and who it can be shared
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* with. An example of a token that shares a scope closer is a CASE scope.
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*
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* @var array
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*/
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public $scopeOpeners = array(
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T_IF => array(
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'start' => T_OPEN_CURLY_BRACKET,
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'end' => T_CLOSE_CURLY_BRACKET,
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'strict' => false,
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'shared' => false,
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'with' => array(),
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),
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T_TRY => array(
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'start' => T_OPEN_CURLY_BRACKET,
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'end' => T_CLOSE_CURLY_BRACKET,
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'strict' => true,
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'shared' => false,
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'with' => array(),
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),
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T_CATCH => array(
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'start' => T_OPEN_CURLY_BRACKET,
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'end' => T_CLOSE_CURLY_BRACKET,
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'strict' => true,
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'shared' => false,
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'with' => array(),
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),
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T_ELSE => array(
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'start' => T_OPEN_CURLY_BRACKET,
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'end' => T_CLOSE_CURLY_BRACKET,
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'strict' => false,
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'shared' => false,
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'with' => array(),
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),
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T_FOR => array(
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'start' => T_OPEN_CURLY_BRACKET,
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'end' => T_CLOSE_CURLY_BRACKET,
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'strict' => false,
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'shared' => false,
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'with' => array(),
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),
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T_FUNCTION => array(
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'start' => T_OPEN_CURLY_BRACKET,
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'end' => T_CLOSE_CURLY_BRACKET,
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'strict' => false,
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'shared' => false,
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'with' => array(),
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),
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T_WHILE => array(
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'start' => T_OPEN_CURLY_BRACKET,
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'end' => T_CLOSE_CURLY_BRACKET,
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'strict' => false,
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'shared' => false,
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'with' => array(),
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),
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T_DO => array(
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'start' => T_OPEN_CURLY_BRACKET,
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'end' => T_CLOSE_CURLY_BRACKET,
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'strict' => true,
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'shared' => false,
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'with' => array(),
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),
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T_SWITCH => array(
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'start' => T_OPEN_CURLY_BRACKET,
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'end' => T_CLOSE_CURLY_BRACKET,
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'strict' => true,
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'shared' => false,
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'with' => array(),
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),
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T_CASE => array(
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'start' => T_COLON,
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'end' => T_BREAK,
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'strict' => true,
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'shared' => true,
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'with' => array(
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T_DEFAULT,
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T_CASE,
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),
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),
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T_DEFAULT => array(
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'start' => T_COLON,
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'end' => T_BREAK,
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'strict' => true,
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'shared' => true,
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'with' => array(T_CASE),
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),
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);
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/**
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* A list of tokens that end the scope.
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*
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* This array is just a unique collection of the end tokens
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* from the _scopeOpeners array. The data is duplicated here to
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* save time during parsing of the file.
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*
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* @var array
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*/
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public $endScopeTokens = array(
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T_CLOSE_CURLY_BRACKET,
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T_BREAK,
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);
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/**
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* A list of special JS tokens and their types.
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*
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* @var array
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*/
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protected $tokenValues = array(
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'function' => 'T_FUNCTION',
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'prototype' => 'T_PROTOTYPE',
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'try' => 'T_TRY',
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'catch' => 'T_CATCH',
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'return' => 'T_RETURN',
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'if' => 'T_IF',
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'else' => 'T_ELSE',
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'do' => 'T_DO',
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'while' => 'T_WHILE',
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'for' => 'T_FOR',
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'var' => 'T_VAR',
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'true' => 'T_TRUE',
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'false' => 'T_FALSE',
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'null' => 'T_NULL',
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'this' => 'T_THIS',
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'(' => 'T_OPEN_PARENTHESIS',
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')' => 'T_CLOSE_PARENTHESIS',
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'{' => 'T_OPEN_CURLY_BRACKET',
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'}' => 'T_CLOSE_CURLY_BRACKET',
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'[' => 'T_OPEN_SQUARE_BRACKET',
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']' => 'T_CLOSE_SQUARE_BRACKET',
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'?' => 'T_INLINE_THEN',
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'.' => 'T_OBJECT_OPERATOR',
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'+' => 'T_PLUS',
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'-' => 'T_MINUS',
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'*' => 'T_MULTIPLY',
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'%' => 'T_MODULUS',
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'/' => 'T_DIVIDE',
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',' => 'T_COMMA',
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';' => 'T_SEMICOLON',
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':' => 'T_COLON',
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'<' => 'T_LESS_THAN',
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'>' => 'T_GREATER_THAN',
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'<=' => 'T_IS_SMALLER_OR_EQUAL',
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'>=' => 'T_IS_GREATER_OR_EQUAL',
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'!' => 'T_BOOLEAN_NOT',
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'!=' => 'T_IS_NOT_EQUAL',
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'!==' => 'T_IS_NOT_IDENTICAL',
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'=' => 'T_EQUAL',
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'==' => 'T_IS_EQUAL',
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'===' => 'T_IS_IDENTICAL',
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'-=' => 'T_MINUS_EQUAL',
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'+=' => 'T_PLUS_EQUAL',
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'++' => 'T_INC',
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'--' => 'T_DEC',
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'//' => 'T_COMMENT',
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'/*' => 'T_COMMENT',
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'/**' => 'T_DOC_COMMENT',
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'*/' => 'T_COMMENT',
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);
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/**
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* A list string delimiters.
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*
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* @var array
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*/
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protected $stringTokens = array(
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'\'',
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'"',
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);
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/**
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* A list tokens that start and end comments.
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*
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* @var array
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*/
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protected $commentTokens = array(
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'//' => null,
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'/*' => '*/',
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'/**' => '*/',
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);
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/**
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* Creates an array of tokens when given some PHP code.
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*
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* Starts by using token_get_all() but does a lot of extra processing
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* to insert information about the context of the token.
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*
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* @param string $string The string to tokenize.
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* @param string $eolChar The EOL character to use for splitting strings.
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*
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* @return array
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*/
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public function tokenizeString($string, $eolChar='\n')
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{
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$tokenTypes = array_keys($this->tokenValues);
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$maxTokenLength = 0;
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foreach ($tokenTypes as $token) {
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if (strlen($token) > $maxTokenLength) {
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$maxTokenLength = strlen($token);
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}
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}
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$tokens = array();
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$inString = '';
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$inComment = '';
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$buffer = '';
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$cleanBuffer = false;
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$tokens[] = array(
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'code' => T_OPEN_TAG,
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'type' => 'T_OPEN_TAG',
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'content' => '',
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);
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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echo "\t*** START TOKENIZING ***".PHP_EOL;
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}
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$chars = str_split($string);
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foreach ($chars as $i => $char) {
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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$content = str_replace($eolChar, '\n', $char);
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if ($inString !== '') {
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echo "\t";
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}
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if ($inComment !== '') {
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echo "\t";
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}
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echo "Process char $i => $content".PHP_EOL;
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}
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if ($inString === '' && $inComment === '' && $buffer !== '') {
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// If the buffer only has whitespace and we are about to
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// add a character, store the whitespace first.
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if (trim($char) !== '' && trim($buffer) === '') {
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$tokens[] = array(
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'code' => T_WHITESPACE,
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'type' => 'T_WHITESPACE',
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'content' => $buffer,
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);
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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$content = str_replace($eolChar, '\n', $buffer);
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echo "=> Added token T_WHITESPACE ($content)".PHP_EOL;
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}
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$buffer = '';
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}
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// If the buffer is not whitespace and we are about to
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// add a whitespace character, store the content first.
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if ($inString === '' && $inComment === '' && trim($char) === '' && trim($buffer) !== '') {
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$tokens[] = array(
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'code' => T_STRING,
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'type' => 'T_STRING',
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'content' => $buffer,
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);
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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$content = str_replace($eolChar, '\n', $buffer);
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echo "=> Added token T_STRING ($content)".PHP_EOL;
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}
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$buffer = '';
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}
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}//end if
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// Process strings.
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if ($inComment === '' && in_array($char, $this->stringTokens) === true) {
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if ($inString === $char) {
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// This could be the end of the string, but make sure it
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// is not escaped first.
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$escapes = 0;
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for ($x = ($i - 1); $x >= 0; $x--) {
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if ($chars[$x] !== '\\') {
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break;
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}
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$escapes++;
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}
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if ($escapes === 0 || ($escapes % 2) === 0) {
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// There is an even number escape chars,
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// so this is not escaped, it is the end of the string.
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$tokens[] = array(
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'code' => T_CONSTANT_ENCAPSED_STRING,
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'type' => 'T_CONSTANT_ENCAPSED_STRING',
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'content' => $buffer.$char,
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);
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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echo "\t* found end of string *".PHP_EOL;
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$content = str_replace($eolChar, '\n', $buffer.$char);
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echo "=> Added token T_CONSTANT_ENCAPSED_STRING $content)".PHP_EOL;
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}
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$buffer = '';
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$inString = '';
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continue;
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}
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} else if ($inString === '') {
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$inString = $char;
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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echo "\t* looking for string closer *".PHP_EOL;
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}
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}//end if
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}//end if
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$buffer .= $char;
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// We don't look for special tokens inside strings,
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// so if we are in a string, we can continue here now
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// that the current char is in the buffer.
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if ($inString !== '') {
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continue;
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}
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// Check for known tokens, but ignore tokens found that are not at
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// the end of a string, like FOR and this.FORmat.
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if (in_array(strtolower($buffer), $tokenTypes) === true && (preg_match('|[a-zA-z0-9_]|', $char) === 0 || preg_match('|[a-zA-z0-9_]|', $chars[($i + 1)]) === 0)) {
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$matchedToken = false;
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$lookAheadLength = ($maxTokenLength - strlen($buffer));
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if ($lookAheadLength > 0) {
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// The buffer contains a token type, but we need
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// to look ahead at the next chars to see if this is
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// actually part of a larger token. For example,
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// FOR and FOREACH.
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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echo "\t* buffer possibly contains token, looking ahead $lookAheadLength chars *".PHP_EOL;
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}
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$charBuffer = $buffer;
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for ($x = 1; $x <= $lookAheadLength; $x++) {
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if (isset($chars[($i + $x)]) === false) {
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break;
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}
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$charBuffer .= $chars[($i + $x)];
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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$content = str_replace($eolChar, '\n', $charBuffer);
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echo "\t=> Looking ahead $x chars => $content".PHP_EOL;
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}
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if (in_array(strtolower($charBuffer), $tokenTypes) === true) {
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// We've found something larger that matches
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// so we can ignore this char.
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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$type = $this->tokenValues[strtolower($charBuffer)];
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echo "\t* look ahead found more specific token ($type), ignoring $i *".PHP_EOL;
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}
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$matchedToken = true;
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break;
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}
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}//end for
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}//end if
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if ($matchedToken === false) {
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$value = $this->tokenValues[strtolower($buffer)];
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$tokens[] = array(
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'code' => constant($value),
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'type' => $value,
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'content' => $buffer,
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);
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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if ($lookAheadLength > 0) {
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echo "\t* look ahead found nothing *".PHP_EOL;
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}
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$content = str_replace($eolChar, '\n', $buffer);
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echo "=> Added token $value ($content)".PHP_EOL;
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}
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$cleanBuffer = true;
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}
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} else if (in_array(strtolower($char), $tokenTypes) === true) {
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// No matter what token we end up using, we don't
|
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// need the content in the buffer any more because we have
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// found a valid token.
|
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$tokens[] = array(
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'code' => T_STRING,
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'type' => 'T_STRING',
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'content' => substr($buffer, 0, -1),
|
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);
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|
|
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
|
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$content = str_replace($eolChar, '\n', substr($buffer, 0, -1));
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echo "=> Added token T_STRING ($content)".PHP_EOL;
|
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}
|
|
|
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if (PHP_CODESNIFFER_VERBOSITY > 1) {
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echo "\t* char is token, looking ahead ".($maxTokenLength - 1).' chars *'.PHP_EOL;
|
|
}
|
|
|
|
// The char is a token type, but we need to look ahead at the
|
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// 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) {
|
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break;
|
|
}
|
|
|
|
$charBuffer .= $chars[($i + $x)];
|
|
|
|
if (PHP_CODESNIFFER_VERBOSITY > 1) {
|
|
$content = str_replace($eolChar, '\n', $charBuffer);
|
|
echo "\t=> Looking ahead $x chars => $content".PHP_EOL;
|
|
}
|
|
|
|
if (in_array(strtolower($charBuffer), $tokenTypes) === true) {
|
|
// We've found something larger that matches
|
|
// so we can ignore this char.
|
|
if (PHP_CODESNIFFER_VERBOSITY > 1) {
|
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$type = $this->tokenValues[strtolower($charBuffer)];
|
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echo "\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)];
|
|
$tokens[] = array(
|
|
'code' => constant($value),
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|
'type' => $value,
|
|
'content' => $char,
|
|
);
|
|
|
|
if (PHP_CODESNIFFER_VERBOSITY > 1) {
|
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echo "\t* look ahead found nothing *".PHP_EOL;
|
|
$content = str_replace($eolChar, '\n', $char);
|
|
echo "=> Added token $value ($content)".PHP_EOL;
|
|
}
|
|
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$cleanBuffer = true;
|
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} else {
|
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$buffer = $char;
|
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}
|
|
}//end if
|
|
|
|
// Keep track of content inside comments.
|
|
if ($inComment === '' && array_key_exists($buffer, $this->commentTokens) === true) {
|
|
// We have started a comment.
|
|
$inComment = $buffer;
|
|
|
|
if (PHP_CODESNIFFER_VERBOSITY > 1) {
|
|
echo "\t* looking for end of comment *".PHP_EOL;
|
|
}
|
|
} else if ($inComment !== '') {
|
|
if ($this->commentTokens[$inComment] === null) {
|
|
// Comment ends at the next newline.
|
|
if (strpos($buffer, $eolChar) !== false) {
|
|
$inComment = '';
|
|
}
|
|
} else {
|
|
if ($this->commentTokens[$inComment] === $buffer) {
|
|
$inComment = '';
|
|
}
|
|
}
|
|
|
|
if (PHP_CODESNIFFER_VERBOSITY > 1) {
|
|
if ($inComment === '') {
|
|
echo "\t* found end of comment *".PHP_EOL;
|
|
}
|
|
}
|
|
}//end if
|
|
|
|
if ($cleanBuffer === true) {
|
|
$buffer = '';
|
|
$cleanBuffer = false;
|
|
}
|
|
}//end foreach
|
|
|
|
$tokens[] = array(
|
|
'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 = array();
|
|
$newStackPtr = 0;
|
|
$numTokens = count($tokens);
|
|
for ($stackPtr = 0; $stackPtr < $numTokens; $stackPtr++) {
|
|
$token = $tokens[$stackPtr];
|
|
|
|
/*
|
|
Look for regular expressions and join the tokens together.
|
|
*/
|
|
|
|
if ($token['code'] === T_DIVIDE) {
|
|
$beforeTokens = array(
|
|
T_EQUAL,
|
|
T_OPEN_PARENTHESIS,
|
|
);
|
|
|
|
$afterTokens = array(
|
|
T_COMMA,
|
|
T_CLOSE_PARENTHESIS,
|
|
T_SEMICOLON,
|
|
T_WHITESPACE,
|
|
);
|
|
|
|
for ($prev = ($stackPtr - 1); $prev >= 0; $prev--) {
|
|
if (in_array($tokens[$prev]['code'], PHP_CodeSniffer_Tokens::$emptyTokens) === false) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Token needs to be one of the standard allowed or the replace()
|
|
// method that can be called on string: string.replace(/abc/...).
|
|
if (in_array($tokens[$prev]['code'], $beforeTokens) === true || $tokens[$prev]['content'] === 'replace') {
|
|
// This might be a regular expression.
|
|
$regexTokens = array(
|
|
T_STRING,
|
|
T_WHITESPACE,
|
|
T_OBJECT_OPERATOR,
|
|
);
|
|
|
|
for ($next = ($stackPtr + 1); $next < $numTokens; $next++) {
|
|
if (in_array($tokens[$next]['code'], $regexTokens) === false) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ($tokens[$next]['code'] === T_DIVIDE) {
|
|
if ($tokens[($next + 1)]['code'] === T_STRING) {
|
|
// The token directly after the end of the regex can
|
|
// be modifiers like global and case insensitive
|
|
// (.e.g, /pattern/gi).
|
|
$next++;
|
|
}
|
|
|
|
$regexEnd = $next;
|
|
|
|
for ($next = ($next + 1); $next < $numTokens; $next++) {
|
|
if (in_array($tokens[$next]['code'], PHP_CodeSniffer_Tokens::$emptyTokens) === false) {
|
|
break;
|
|
} else if (strpos($tokens[$next]['content'], $eolChar) !== false) {
|
|
// If this is the last token on the line.
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (in_array($tokens[$next]['code'], $afterTokens) === true) {
|
|
// This is a regular expression, so join all the
|
|
// tokens together.
|
|
for ($i = ($stackPtr + 1); $i <= $regexEnd; $i++) {
|
|
$token['content'] .= $tokens[$i]['content'];
|
|
}
|
|
|
|
$token['code'] = T_REGULAR_EXPRESSION;
|
|
$token['type'] ='T_REGULAR_EXPRESSION';
|
|
$stackPtr = $regexEnd;
|
|
}
|
|
}
|
|
}//end if
|
|
}//end if
|
|
|
|
/*
|
|
Look for comments and join the tokens together.
|
|
*/
|
|
|
|
if (array_key_exists($token['content'], $this->commentTokens) === true) {
|
|
$newContent = '';
|
|
$tokenContent = $token['content'];
|
|
$endContent = $this->commentTokens[$tokenContent];
|
|
while ($tokenContent !== $endContent) {
|
|
if ($endContent === null && strpos($tokenContent, $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, $eolChar) + strlen($eolChar)));
|
|
|
|
$tokenContent = substr($tokenContent, 0, (strpos($tokenContent, $eolChar) + strlen($eolChar)));
|
|
|
|
// If the substr failed, skip the token as the content
|
|
// will now be blank.
|
|
if ($tokens[$stackPtr]['content'] !== false) {
|
|
$stackPtr--;
|
|
}
|
|
|
|
break;
|
|
}//end if
|
|
|
|
$stackPtr++;
|
|
$newContent .= $tokenContent;
|
|
if (isset($tokens[$stackPtr]) === false) {
|
|
break;
|
|
}
|
|
|
|
$tokenContent = $tokens[$stackPtr]['content'];
|
|
}//end while
|
|
|
|
// 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 asertain where errors occur on a line.
|
|
Note that $token[1] is the token's content.
|
|
*/
|
|
|
|
if (strpos($token['content'], $eolChar) !== false) {
|
|
$tokenLines = explode($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'] .= $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--;
|
|
} else {
|
|
$stackPtr = $oldStackPtr;
|
|
}
|
|
}//end if
|
|
}//end for
|
|
|
|
if (PHP_CODESNIFFER_VERBOSITY > 1) {
|
|
echo "\t*** END TOKENIZING ***".PHP_EOL;
|
|
}
|
|
|
|
return $finalTokens;
|
|
|
|
}//end tokenizeString()
|
|
|
|
|
|
}//end class
|
|
|
|
?>
|