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<?php |
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namespace UCD\Unicode\Codepoint; |
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use UCD\Unicode\Codepoint; |
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use UCD\Exception\InvalidRangeException; |
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use UCD\Unicode\TransformationFormat; |
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class Range |
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{ |
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/** |
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* @var Codepoint |
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*/ |
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private $start; |
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/** |
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* @var Codepoint |
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*/ |
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private $end; |
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/** |
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* @param Codepoint $start |
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* @param Codepoint $end |
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* @throws InvalidRangeException |
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*/ |
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protected function __construct(Codepoint $start, Codepoint $end) |
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{ |
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if ($start->getValue() > $end->getValue()) { |
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throw new InvalidRangeException(); |
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} |
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$this->start = $start; |
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$this->end = $end; |
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} |
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/** |
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* @param Codepoint $start |
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* @param Codepoint $end |
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* @return self |
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*/ |
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public static function between(Codepoint $start, Codepoint $end) |
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{ |
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return new self($start, $end); |
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} |
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/** |
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* @param string $start |
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* @param string $end |
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* @param TransformationFormat $encoding |
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* @return self |
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*/ |
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public static function betweenEncodedCharacters($start, $end, TransformationFormat $encoding) |
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{ |
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return self::between( |
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Codepoint::fromEncodedCharacter($start, $encoding), |
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Codepoint::fromEncodedCharacter($end, $encoding) |
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); |
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} |
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/** |
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* @return Codepoint |
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*/ |
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public function getStart() |
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{ |
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return $this->start; |
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} |
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/** |
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* @return Codepoint |
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*/ |
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public function getEnd() |
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{ |
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return $this->end; |
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} |
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/** |
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* @return bool |
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*/ |
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public function representsSingleCodepoint() |
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{ |
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return $this->start->equals($this->end); |
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} |
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/** |
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* @return Codepoint[]|Collection |
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*/ |
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public function expand() |
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{ |
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return new Collection( |
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$this->yieldCodepoints() |
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); |
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} |
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/** |
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* @return \Generator |
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*/ |
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private function yieldCodepoints() |
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{ |
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$start = $this->getStart()->getValue(); |
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$end = $this->getEnd()->getValue(); |
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for ($i = $start; $i <= $end; $i++) { |
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yield Codepoint::fromInt($i); |
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} |
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} |
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} |
nick-jones /
php-ucd
