112 lines
2.8 KiB
PHP
112 lines
2.8 KiB
PHP
<?php
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/*
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* This file is part of Psy Shell.
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*
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* (c) 2012-2017 Justin Hileman
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Psy\TabCompletion;
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use Psy\TabCompletion\Matcher\AbstractMatcher;
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/**
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* A readline tab completion service.
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*
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* @author Marc Garcia <markcial@gmail.com>
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*/
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class AutoCompleter
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{
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/** @var Matcher\AbstractMatcher[] */
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protected $matchers;
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/**
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* Register a tab completion Matcher.
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*
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* @param AbstractMatcher $matcher
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*/
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public function addMatcher(AbstractMatcher $matcher)
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{
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$this->matchers[] = $matcher;
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}
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/**
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* Activate readline tab completion.
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*/
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public function activate()
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{
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readline_completion_function(array(&$this, 'callback'));
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}
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/**
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* Handle readline completion.
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*
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* @param string $input Readline current word
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* @param int $index Current word index
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* @param array $info readline_info() data
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*
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* @return array
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*/
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public function processCallback($input, $index, $info = array())
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{
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// Some (Windows?) systems provide incomplete `readline_info`, so let's
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// try to work around it.
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$line = $info['line_buffer'];
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if (isset($info['end'])) {
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$line = substr($line, 0, $info['end']);
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}
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if ($line === '' && $input !== '') {
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$line = $input;
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}
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$tokens = token_get_all('<?php ' . $line);
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// remove whitespaces
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$tokens = array_filter($tokens, function ($token) {
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return !AbstractMatcher::tokenIs($token, AbstractMatcher::T_WHITESPACE);
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});
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$matches = array();
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foreach ($this->matchers as $matcher) {
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if ($matcher->hasMatched($tokens)) {
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$matches = array_merge($matcher->getMatches($tokens), $matches);
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}
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}
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$matches = array_unique($matches);
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return !empty($matches) ? $matches : array('');
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}
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/**
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* The readline_completion_function callback handler.
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*
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* @see processCallback
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*
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* @param $input
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* @param $index
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*
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* @return array
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*/
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public function callback($input, $index)
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{
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return $this->processCallback($input, $index, readline_info());
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}
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/**
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* Remove readline callback handler on destruct.
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*/
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public function __destruct()
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{
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// PHP didn't implement the whole readline API when they first switched
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// to libedit. And they still haven't.
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//
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// So this is a thing to make PsySH work on 5.3.x:
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if (function_exists('readline_callback_handler_remove')) {
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readline_callback_handler_remove();
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}
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}
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}
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