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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2023 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\TabCompletion\Matcher;
/**
* Abstract tab completion Matcher.
*
* @author Marc Garcia <markcial@gmail.com>
*/
abstract class AbstractMatcher
{
/** Syntax types */
const CONSTANT_SYNTAX = '^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$';
const VAR_SYNTAX = '^\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$';
const MISC_OPERATORS = '+-*/^|&';
/** Token values */
const T_OPEN_TAG = 'T_OPEN_TAG';
const T_VARIABLE = 'T_VARIABLE';
const T_OBJECT_OPERATOR = 'T_OBJECT_OPERATOR';
const T_DOUBLE_COLON = 'T_DOUBLE_COLON';
const T_NEW = 'T_NEW';
const T_CLONE = 'T_CLONE';
const T_NS_SEPARATOR = 'T_NS_SEPARATOR';
const T_STRING = 'T_STRING';
const T_NAME_QUALIFIED = 'T_NAME_QUALIFIED';
const T_WHITESPACE = 'T_WHITESPACE';
const T_AND_EQUAL = 'T_AND_EQUAL';
const T_BOOLEAN_AND = 'T_BOOLEAN_AND';
const T_BOOLEAN_OR = 'T_BOOLEAN_OR';
const T_ENCAPSED_AND_WHITESPACE = 'T_ENCAPSED_AND_WHITESPACE';
const T_REQUIRE = 'T_REQUIRE';
const T_REQUIRE_ONCE = 'T_REQUIRE_ONCE';
const T_INCLUDE = 'T_INCLUDE';
const T_INCLUDE_ONCE = 'T_INCLUDE_ONCE';
/**
* Check whether this matcher can provide completions for $tokens.
*
* @param array $tokens Tokenized readline input
*
* @return false
*/
public function hasMatched(array $tokens): bool
{
return false;
}
/**
* Get current readline input word.
*
* @param array $tokens Tokenized readline input (see token_get_all)
*/
protected function getInput(array $tokens): string
{
$var = '';
$firstToken = \array_pop($tokens);
if (self::tokenIs($firstToken, self::T_STRING)) {
$var = $firstToken[1];
}
return $var;
}
/**
* Get current namespace and class (if any) from readline input.
*
* @param array $tokens Tokenized readline input (see token_get_all)
*/
protected function getNamespaceAndClass(array $tokens): string
{
$class = '';
while (self::hasToken(
[self::T_NS_SEPARATOR, self::T_STRING, self::T_NAME_QUALIFIED],
$token = \array_pop($tokens)
)) {
if (self::needCompleteClass($token)) {
continue;
}
$class = $token[1].$class;
}
return $class;
}
/**
* Provide tab completion matches for readline input.
*
* @param array $tokens information substracted with get_token_all
* @param array $info readline_info object
*
* @return array The matches resulting from the query
*/
abstract public function getMatches(array $tokens, array $info = []): array;
/**
* Check whether $word starts with $prefix.
*
* @param string $prefix
* @param string $word
*/
public static function startsWith(string $prefix, string $word): bool
{
return \preg_match(\sprintf('#^%s#', $prefix), $word);
}
/**
* Check whether $token matches a given syntax pattern.
*
* @param mixed $token A PHP token (see token_get_all)
* @param string $syntax A syntax pattern (default: variable pattern)
*/
public static function hasSyntax($token, string $syntax = self::VAR_SYNTAX): bool
{
if (!\is_array($token)) {
return false;
}
$regexp = \sprintf('#%s#', $syntax);
return (bool) \preg_match($regexp, $token[1]);
}
/**
* Check whether $token type is $which.
*
* @param mixed $token A PHP token (see token_get_all)
* @param string $which A PHP token type
*/
public static function tokenIs($token, string $which): bool
{
if (!\is_array($token)) {
return false;
}
return \token_name($token[0]) === $which;
}
/**
* Check whether $token is an operator.
*
* @param mixed $token A PHP token (see token_get_all)
*/
public static function isOperator($token): bool
{
if (!\is_string($token)) {
return false;
}
return \strpos(self::MISC_OPERATORS, $token) !== false;
}
public static function needCompleteClass($token): bool
{
return \in_array($token[1], ['doc', 'ls', 'show']);
}
/**
* Check whether $token type is present in $coll.
*
* @param array $coll A list of token types
* @param mixed $token A PHP token (see token_get_all)
*/
public static function hasToken(array $coll, $token): bool
{
if (!\is_array($token)) {
return false;
}
return \in_array(\token_name($token[0]), $coll);
}
}
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