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Merge "Add Range::compareBoundaryPoints"

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jenkins-bot 2021-12-17 16:48:04 +00:00 committed by Gerrit Code Review
parent 5299596882 12aa136f54
commit be07ec8cfc
1 changed files with 58 additions and 0 deletions
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58
includes/ImmutableRange.php
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@ -488,4 +488,62 @@ class ImmutableRange {
return $AFollowsB ? 'after' : 'before';
}
public const START_TO_START = 0;
public const START_TO_END = 1;
public const END_TO_END = 2;
public const END_TO_START = 3;
/**
* Compares the boundary points of this Range with another Range.
*
* Ported from https://github.com/TRowbotham/PHPDOM (MIT)
*
* @see https://dom.spec.whatwg.org/#dom-range-compareboundarypoints
*
* @param int $how One of ImmutableRange::END_TO_END, ImmutableRange::END_TO_START,
* ImmutableRange::START_TO_END, ImmutableRange::START_TO_START
* @param ImmutableRange $sourceRange A Range whose boundary points are to be compared.
* @return int -1, 0, or 1
*/
public function compareBoundaryPoints( int $how, self $sourceRange ): int {
if ( self::getRootNode( $this->mStartContainer ) !== self::getRootNode( $sourceRange->startContainer ) ) {
throw new Error();
}
switch ( $how ) {
case self::START_TO_START:
$thisPoint = [ $this->mStartContainer, $this->mStartOffset ];
$otherPoint = [ $sourceRange->startContainer, $sourceRange->startOffset ];
break;
case self::START_TO_END:
$thisPoint = [ $this->mEndContainer, $this->mEndOffset ];
$otherPoint = [ $sourceRange->startContainer, $sourceRange->startOffset ];
break;
case self::END_TO_END:
$thisPoint = [ $this->mEndContainer, $this->mEndOffset ];
$otherPoint = [ $sourceRange->endContainer, $sourceRange->endOffset ];
break;
case self::END_TO_START:
$thisPoint = [ $this->mStartContainer, $this->mStartOffset ];
$otherPoint = [ $sourceRange->endContainer, $sourceRange->endOffset ];
break;
default:
throw new Error();
}
switch ( $this->computePosition( ...$thisPoint, ...$otherPoint ) ) {
case 'before':
return -1;
case 'equal':
return 0;
case 'after':
return 1;
}
}
}