Chris@13: <?php
Chris@13: 
Chris@13: /*
Chris@13:  * This file is part of Psy Shell.
Chris@13:  *
Chris@13:  * (c) 2012-2018 Justin Hileman
Chris@13:  *
Chris@13:  * For the full copyright and license information, please view the LICENSE
Chris@13:  * file that was distributed with this source code.
Chris@13:  */
Chris@13: 
Chris@13: namespace Psy\TabCompletion\Matcher;
Chris@13: 
Chris@13: /**
Chris@13:  * A PHP keyword tab completion Matcher.
Chris@13:  *
Chris@13:  * This matcher provides completion for all function-like PHP keywords.
Chris@13:  *
Chris@13:  * @author Marc Garcia <markcial@gmail.com>
Chris@13:  */
Chris@13: class KeywordsMatcher extends AbstractMatcher
Chris@13: {
Chris@13:     protected $keywords = [
Chris@13:         'array', 'clone', 'declare', 'die', 'echo', 'empty', 'eval', 'exit', 'include',
Chris@13:         'include_once', 'isset', 'list', 'print',  'require', 'require_once', 'unset',
Chris@13:     ];
Chris@13: 
Chris@13:     protected $mandatoryStartKeywords = [
Chris@13:         'die', 'echo', 'print', 'unset',
Chris@13:     ];
Chris@13: 
Chris@13:     /**
Chris@13:      * Get all (completable) PHP keywords.
Chris@13:      *
Chris@13:      * @return array
Chris@13:      */
Chris@13:     public function getKeywords()
Chris@13:     {
Chris@13:         return $this->keywords;
Chris@13:     }
Chris@13: 
Chris@13:     /**
Chris@13:      * Check whether $keyword is a (completable) PHP keyword.
Chris@13:      *
Chris@13:      * @param string $keyword
Chris@13:      *
Chris@13:      * @return bool
Chris@13:      */
Chris@13:     public function isKeyword($keyword)
Chris@13:     {
Chris@17:         return \in_array($keyword, $this->keywords);
Chris@13:     }
Chris@13: 
Chris@13:     /**
Chris@13:      * {@inheritdoc}
Chris@13:      */
Chris@13:     public function getMatches(array $tokens, array $info = [])
Chris@13:     {
Chris@13:         $input = $this->getInput($tokens);
Chris@13: 
Chris@17:         return \array_filter($this->keywords, function ($keyword) use ($input) {
Chris@13:             return AbstractMatcher::startsWith($input, $keyword);
Chris@13:         });
Chris@13:     }
Chris@13: 
Chris@13:     /**
Chris@13:      * {@inheritdoc}
Chris@13:      */
Chris@13:     public function hasMatched(array $tokens)
Chris@13:     {
Chris@17:         $token     = \array_pop($tokens);
Chris@17:         $prevToken = \array_pop($tokens);
Chris@13: 
Chris@13:         switch (true) {
Chris@13:             case self::hasToken([self::T_OPEN_TAG, self::T_VARIABLE], $token):
Chris@13: //            case is_string($token) && $token === '$':
Chris@13:             case self::hasToken([self::T_OPEN_TAG, self::T_VARIABLE], $prevToken) &&
Chris@13:                 self::tokenIs($token, self::T_STRING):
Chris@13:             case self::isOperator($token):
Chris@13:                 return true;
Chris@13:         }
Chris@13: 
Chris@13:         return false;
Chris@13:     }
Chris@13: }