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<?php |
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/** |
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* (c) Steve Nebes <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace SN\DaisyDiff\Html\Ancestor; |
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use SN\DaisyDiff\Html\Dom\TagNode; |
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use SN\DaisyDiff\Html\Dom\TextNode; |
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use SN\DaisyDiff\RangeDifferencer\Core\LCSSettings; |
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use SN\DaisyDiff\RangeDifferencer\RangeComparatorInterface; |
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use SN\DaisyDiff\RangeDifferencer\RangeDifferencer; |
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/** |
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* A comparator that compares only the elements of text inside a given tag. |
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*/ |
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class TextOnlyComparator implements RangeComparatorInterface |
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{ |
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/** @var TextNode[] */ |
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private $leafs = []; |
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/** |
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* Default values. |
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* |
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* @param TagNode $tree |
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*/ |
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public function __construct(TagNode $tree) |
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{ |
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$this->addRecursive($tree); |
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} |
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/** |
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* @param TagNode $tree |
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*/ |
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private function addRecursive(TagNode $tree): void |
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{ |
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foreach ($tree as $child) { |
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if ($child instanceof TagNode) { |
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$this->addRecursive($child); |
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} elseif ($child instanceof TextNode) { |
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$this->leafs[] = $child; |
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} |
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} |
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} |
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/** |
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* @return int |
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*/ |
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public function getRangeCount(): int |
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{ |
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return \count($this->leafs); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function rangesEqual(int $thisIndex, RangeComparatorInterface $other, int $otherIndex): bool |
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{ |
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if ($other instanceof TextOnlyComparator) { |
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return $this->getLeaf($thisIndex)->isSameText($other->getLeaf($otherIndex)); |
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} |
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return false; // @codeCoverageIgnore |
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} |
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/** |
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* @param int $index |
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* @return TextNode |
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* |
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* @throws \OutOfBoundsException |
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*/ |
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public function getLeaf(int $index): TextNode |
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{ |
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if (isset($this->leafs[$index])) { |
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return $this->leafs[$index]; |
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} |
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throw new \OutOfBoundsException(\sprintf('Index: %d, Size: %d', $index, \count($this->leafs))); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function skipRangeComparison(int $length, int $maxLength, RangeComparatorInterface $other): bool |
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{ |
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return false; |
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} |
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/** |
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* @param TextOnlyComparator $other |
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* @return float |
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*/ |
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public function getMatchRatio(TextOnlyComparator $other): float |
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{ |
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$settings = new LCSSettings(); |
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$settings->setUseGreedyMethod(true); |
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$settings->setPowLimit(1.5); |
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$settings->setTooLong(150 * 150); |
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$differences = RangeDifferencer::findDifferences($other, $this, $settings); |
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$distanceOther = 0; |
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$distanceThis = 0; |
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foreach ($differences as $d) { |
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$distanceOther += $d->getLeftLength(); |
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$distanceThis += $d->getRightLength(); |
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} |
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return (float) ((0.0 + $distanceOther) / $other->getRangeCount() + |
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(0.0 + $distanceThis) / $this->getRangeCount()) / 2; |
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} |
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} |
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snebes /
php-daisydiff
