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<?php |
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namespace Spatie\PhpUnitWatcher\Screens\Completers; |
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use Clue\React\Stdio\Readline; |
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abstract class Completer |
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{ |
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/** |
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* @var \Clue\React\Stdio\Readline |
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*/ |
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protected $readline; |
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/** |
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* @var string |
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*/ |
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protected $word; |
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/** |
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* @var int |
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*/ |
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protected $wordStartOffset; |
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/** |
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* @var int |
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*/ |
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protected $wordEndOffset; |
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/** |
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* @var \Closure|callable |
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*/ |
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protected $filterSuggestionsCallback; |
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/** |
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* @param \Clue\React\Stdio\Readline $readline |
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*/ |
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public function __construct(Readline $readline) |
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{ |
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$this->readline = $readline; |
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} |
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/** |
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* Start completion |
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* |
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* @param string $word |
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* @param int $startOffset |
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* @param int $endOffset |
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* @return array|null |
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*/ |
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public function __invoke($word, $startOffset, $endOffset) |
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{ |
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$this->word = $word; |
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$this->wordStartOffset = $startOffset; |
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$this->wordEndOffset = $endOffset; |
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return $this->handleSearchResults( |
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$this->search() |
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); |
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} |
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/** |
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* Search for things related to the completed word and return an array of suggestions |
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* |
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* Use an array with one element to autocomplete the word |
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* |
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* @return array |
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*/ |
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abstract protected function search(); |
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/** |
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* Display suggestions or complete the word depending on number of results |
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* |
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* When returning an array reactphp-stdio will display suggestions with the default behavior. |
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* |
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* @param array $searchResults |
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* @return array|null |
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*/ |
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protected function handleSearchResults($searchResults) |
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{ |
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if (empty($searchResults)) { |
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return null; |
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} |
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if (count($searchResults) > 1) { |
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return $this->filterSuggestions($searchResults); |
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} |
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$this->completeWord($searchResults[0]); |
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} |
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/** |
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* Filter suggestions to display |
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* |
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* @param array $suggestions |
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* @return array|null |
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*/ |
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protected function filterSuggestions($suggestions) |
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{ |
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if (is_callable($this->filterSuggestionsCallback)) { |
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$suggestions = ($this->filterSuggestionsCallback)($suggestions); |
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} |
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return $suggestions; |
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} |
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/** |
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* Register callback called when more than one suggestion is available |
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* |
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* You can use this callback to filter suggestions or to abort the |
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* default display behavior by returning null |
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* |
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* @param callable $callback |
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*/ |
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public function onSuggestions($callback) |
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{ |
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$this->filterSuggestionsCallback = $callback; |
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} |
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/** |
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* Refresh the input with the completed word and move cursor to end of the word |
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* |
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* @param string $newWord |
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*/ |
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protected function completeWord($newWord) |
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{ |
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$endQuotedWord = $this->appendQuoteIfNeeded($newWord); |
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$this->readline->setInput( |
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$this->getInputBeforeWord() . $endQuotedWord . $this->getInputAfterWord() |
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); |
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$this->readline->moveCursorTo($this->wordStartOffset + mb_strlen($endQuotedWord)); |
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} |
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/** |
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* Return input string before the word |
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* |
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* @return string |
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*/ |
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protected function getInputBeforeWord() |
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{ |
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return mb_substr($this->getInput(), 0, $this->wordStartOffset); |
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} |
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/** |
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* Return input string after the word |
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* |
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* @return string |
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*/ |
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protected function getInputAfterWord() |
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{ |
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return mb_substr($this->getInput(), $this->wordEndOffset); |
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} |
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/** |
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* Return the character before the word |
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* |
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* @return null|string |
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*/ |
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protected function getCharBeforeWord() |
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{ |
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return $this->wordStartOffset > 0 |
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? mb_substr($this->getInput(), $this->wordStartOffset - 1, 1) |
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: null; |
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} |
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/** |
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* Append a quote if word is prefixed with a quote |
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* |
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* @param string $word |
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* @return string |
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*/ |
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protected function appendQuoteIfNeeded($word) |
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{ |
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$char = $this->getCharBeforeWord(); |
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return ($char === '"' || $char === '\'') |
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? $word . $char |
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: $word; |
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} |
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/** |
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* Return the input string |
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* |
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* @return string |
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*/ |
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protected function getInput() |
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{ |
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return $this->readline->getInput(); |
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} |
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} |
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