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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\Interactive\Actions; use Psy\Readline\Interactive\Input\Buffer; use Psy\Readline\Interactive\Input\History; use Psy\Readline\Interactive\Readline; use Psy\Readline\Interactive\Terminal; /** * Navigate to previous history entry (Up arrow). * * Fish/ZSH-style behavior: first moves within soft-wrapped visual rows, then * in multi-line mode moves to the previous logical line. Only navigates to * previous history entry when already at the top of the buffer. */ class PreviousHistoryAction implements ActionInterface { private History $history; public function __construct(History $history) { $this->history = $history; } /** * {@inheritdoc} */ public function execute(Buffer $buffer, Terminal $terminal, Readline $readline): bool { if ($buffer->moveToPreviousVisualRow( $terminal->getWidth(), $readline->getPromptWidthForCurrentLine($buffer) )) { return true; } if ($readline->isMultilineMode() && !$buffer->isOnFirstLine()) { $buffer->moveToPreviousLine(); return true; } $enteringHistory = !$this->history->isInHistory(); $text = $buffer->getText(); // Set the search term when first entering history navigation if ($enteringHistory) { $this->history->setSearchTerm($text !== '' ? $text : null); } $entry = $this->history->getPrevious(); if ($entry === null) { $terminal->bell(); return true; } // Save current input before navigating away so we can restore it if ($enteringHistory && $text !== '') { $this->history->saveTemporaryEntry($text); } $buffer->setText($entry); return true; } /** * {@inheritdoc} */ public function getName(): string { return 'previous-history'; } }
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