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<?php /* * This file is part of Psy Shell. * * (c) 2012-2026 Justin Hileman * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. / namespace Psy\Readline; use Psy\CodeAnalysis\BufferAnalyzer; use Psy\Readline\Interactive\Input\StatementCompletenessPolicy; use Psy\Shell; use Symfony\Component\Console\Output\OutputInterface; /* * Decorates a legacy physical-line readline and returns logical statements. / class LegacyReadline implements ShellReadlineInterface { private Readline $readline; private ?Shell $shell = null; private ?OutputInterface $output = null; private bool $requireSemicolons = false; private ?string $bufferPrompt = null; private BufferAnalyzer $bufferAnalyzer; private StatementCompletenessPolicy $statementCompletenessPolicy; private array $buffer = []; /* * @param mixed $readline A decorated readline instance / public function __construct($readline = null, $historySize = 0, $eraseDups = false) { if (!($readline instanceof Readline)) { throw new \InvalidArgumentException('LegacyReadline requires a decorated Readline instance.'); } $this->readline = $readline; $this->bufferAnalyzer = new BufferAnalyzer(); $this->statementCompletenessPolicy = new StatementCompletenessPolicy($this->bufferAnalyzer); } public static function isSupported(): bool { return true; } public static function supportsBracketedPaste(): bool { return false; } public function addHistory(string $line): bool { return $this->readline->addHistory($line); } public function clearHistory(): bool { return $this->readline->clearHistory(); } public function listHistory(): array { return $this->readline->listHistory(); } public function readHistory(): bool { return $this->readline->readHistory(); } public function readline(?string $prompt = null) { $lines = $this->buffer; if ($lines !== []) { $text = \implode("\n", $lines); if ($this->statementCompletenessPolicy->isCompleteStatement($text)) { $this->clearBuffer(); return $text; } } while (true) { $linePrompt = ($lines === []) ? $prompt : ($this->bufferPrompt ?? $prompt); $line = $this->readline->readline($linePrompt); if ($line === false) { if ($lines === []) { return false; } // Mirror the legacy shell behavior for Ctrl+D mid-buffer: // clear the partial statement and return to a fresh prompt. $this->clearBuffer(); if ($this->output !== null) { $this->output->writeln(''); } return ''; } if ($lines !== [] && $this->isCommand($line) && !$this->inputInOpenStringOrComment($line)) { return $line; } [$line, $keepBufferOpen] = $this->normalizeLine($line); $lines[] = $line; $this->buffer = $lines; $text = \implode("\n", $lines); if (!$keepBufferOpen && $this->statementCompletenessPolicy->isCompleteStatement($text)) { $this->clearBuffer(); return $text; } } } public function redisplay() { $this->readline->redisplay(); } public function writeHistory(): bool { return $this->readline->writeHistory(); } public function setRequireSemicolons(bool $require): void { $this->requireSemicolons = $require; $this->statementCompletenessPolicy = new StatementCompletenessPolicy( $this->bufferAnalyzer, $this->requireSemicolons ); } public function setBufferPrompt(?string $prompt): void { $this->bufferPrompt = $prompt; } /* * Set the shell output for buffer-clearing notifications. / public function setOutput(OutputInterface $output): void { $this->output = $output; } /* * Set the shell instance for command detection while buffering input. / public function setShell(Shell $shell): void { $this->shell = $shell; } /* * Get the buffered physical lines for the current incomplete statement. * * @return string[] / public function getBuffer(): array { return $this->buffer; } /* * Check whether there is buffered multiline input. / public function hasBuffer(): bool { return $this->buffer !== []; } /* * Append generated code to the active multiline buffer. / public function append(string $code): void { foreach (\explode("\n", $code) as $line) { $this->buffer[] = $line; } } /* * Clear the current incomplete statement buffer. / public function clearBuffer(): void { $this->buffer = []; } /* * Strip the legacy trailing backslash continuation marker. / private function normalizeLine(string $line): array { $trimmed = \rtrim($line); if (\substr($trimmed, -1) === '\\') { return [\substr($trimmed, 0, -1), true]; } return [$line, false]; } /* * Check if the current physical line is a PsySH command. / private function isCommand(string $input): bool { if ($this->shell === null) { return false; } return $this->shell->hasCommand($input); } /* * Check whether the current buffer plus input is in an open string or comment. */ private function inputInOpenStringOrComment(string $input): bool { if ($this->buffer === []) { return false; } $code = $this->buffer; $code[] = $input; return $this->bufferAnalyzer->analyze(\implode("\n", $code))->endsInOpenStringOrComment(); } }

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