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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\Layout; /** * Terminal soft-wrap geometry calculations. */ class SoftWrapCalculator { private int $terminalWidth; public function __construct(int $terminalWidth) { $this->terminalWidth = \max(1, $terminalWidth); } public function getTerminalWidth(): int { return $this->terminalWidth; } /** * Normalize an absolute terminal column (1-indexed) into visible column. */ public function normalizeColumn(int $absoluteColumn): int { $offset = \max(0, $absoluteColumn - 1); return ($offset % $this->terminalWidth) + 1; } /** * Get wrapped row offset for an absolute terminal column (1-indexed). */ public function rowOffsetForAbsoluteColumn(int $absoluteColumn): int { return \intdiv(\max(0, $absoluteColumn - 1), $this->terminalWidth); } /** * Count wrapped rows occupied by text with this display width. * * Zero-width text still occupies one row. */ public function rowCountForDisplayWidth(int $displayWidth): int { if ($displayWidth <= 0) { return 1; } return \intdiv($displayWidth - 1, $this->terminalWidth) + 1; } }
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