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<?php namespace Laravel\Prompts; use Closure; use Illuminate\Support\Collection; class SelectPrompt extends Prompt { use Concerns\ReducesScrollingToFitTerminal; /** * The index of the highlighted option. */ public int $highlighted = 0; /** * The index of the first visible option. */ public int $firstVisible = 0; /** * The options for the select prompt. * * @var array<int|string, string> */ public array $options; /** * Create a new SelectPrompt instance. * * @param array<int|string, string>|Collection<int|string, string> $options */ public function __construct( public string $label, array|Collection $options, public int|string|null $default = null, public int $scroll = 5, public ?Closure $validate = null, public string $hint = '' ) { $this->options = $options instanceof Collection ? $options->all() : $options; $this->reduceScrollingToFitTerminal(); if ($this->default) { if (array_is_list($this->options)) { $this->highlighted = array_search($this->default, $this->options) ?: 0; } else { $this->highlighted = array_search($this->default, array_keys($this->options)) ?: 0; } // If the default is not visible, scroll and center it. // If it's near the end of the list, we just scroll to the end. if ($this->highlighted >= $this->scroll) { $optionsLeft = count($this->options) - $this->highlighted - 1; $halfScroll = (int) floor($this->scroll / 2); $endOffset = max(0, $halfScroll - $optionsLeft); // If the scroll is even, we need to subtract one more // in order to take the highlighted option into account. // Since when the scroll is odd the halfScroll is floored, // we don't need to do anything. if ($this->scroll % 2 === 0) { $endOffset--; } $this->firstVisible = $this->highlighted - $halfScroll - $endOffset; } } $this->on('key', fn ($key) => match ($key) { Key::UP, Key::UP_ARROW, Key::LEFT, Key::LEFT_ARROW, Key::SHIFT_TAB, Key::CTRL_P, Key::CTRL_B, 'k', 'h' => $this->highlightPrevious(), Key::DOWN, Key::DOWN_ARROW, Key::RIGHT, Key::RIGHT_ARROW, Key::TAB, Key::CTRL_N, Key::CTRL_F, 'j', 'l' => $this->highlightNext(), Key::ENTER => $this->submit(), default => null, }); } /** * Get the selected value. */ public function value(): int|string|null { if (array_is_list($this->options)) { return $this->options[$this->highlighted] ?? null; } else { return array_keys($this->options)[$this->highlighted]; } } /** * Get the selected label. */ public function label(): ?string { if (array_is_list($this->options)) { return $this->options[$this->highlighted] ?? null; } else { return $this->options[array_keys($this->options)[$this->highlighted]] ?? null; } } /** * The currently visible options. * * @return array<int|string, string> */ public function visible(): array { return array_slice($this->options, $this->firstVisible, $this->scroll, preserve_keys: true); } /** * Highlight the previous entry, or wrap around to the last entry. */ protected function highlightPrevious(): void { $this->highlighted = $this->highlighted === 0 ? count($this->options) - 1 : $this->highlighted - 1; if ($this->highlighted < $this->firstVisible) { $this->firstVisible--; } elseif ($this->highlighted === count($this->options) - 1) { $this->firstVisible = count($this->options) - min($this->scroll, count($this->options)); } } /** * Highlight the next entry, or wrap around to the first entry. */ protected function highlightNext(): void { $this->highlighted = $this->highlighted === count($this->options) - 1 ? 0 : $this->highlighted + 1; if ($this->highlighted > $this->firstVisible + $this->scroll - 1) { $this->firstVisible++; } elseif ($this->highlighted === 0) { $this->firstVisible = 0; } } }