Add DOMNode::compareDocumentPosition() #12146
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| . Added constant DOMNode::DOCUMENT_POSITION_DISCONNECTED. | ||
| . Added constant DOMNode::DOCUMENT_POSITION_PRECEDING. | ||
| . Added constant DOMNode::DOCUMENT_POSITION_FOLLOWING. | ||
| . Added constant DOMNode::DOCUMENT_POSITION_CONTAINS. | ||
| . Added constant DOMNode::DOCUMENT_POSITION_CONTAINED_BY. | ||
| . Added constant DOMNode::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC. |
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Would it make sense to make this an enum?
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I thought about that too. The problem is that they're bitflags, so they might be OR'ed with eachother. That's something not supported with enums right now.
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Enum sets would be nice to have indeed :(
| . Added constant DOMNode::DOCUMENT_POSITION_DISCONNECTED. | ||
| . Added constant DOMNode::DOCUMENT_POSITION_PRECEDING. | ||
| . Added constant DOMNode::DOCUMENT_POSITION_FOLLOWING. | ||
| . Added constant DOMNode::DOCUMENT_POSITION_CONTAINS. | ||
| . Added constant DOMNode::DOCUMENT_POSITION_CONTAINED_BY. | ||
| . Added constant DOMNode::DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC. |
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Enum sets would be nice to have indeed :(
ext/dom/node.c
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| /* Special case: comparing children and attributes. | ||
| * They belong to a different tree and are therefore hard to compare, but spec demands attributes to precede children | ||
| * according to the pre-order DFS numbering. |
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Depth-first search. I'll write it out in full.
| --EXPECT-- | ||
| --- Compare 0 and 1 --- | ||
| int(36) | ||
| --- Compare 0 and 2 --- | ||
| int(36) | ||
| --- Compare 1 and 2 --- | ||
| int(36) | ||
| --- Compare 1 and 0 --- | ||
| int(34) | ||
| --- Compare 2 and 0 --- | ||
| int(34) | ||
| --- Compare 2 and 1 --- | ||
| int(34) |
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I'll clean it up so it's easier to understand.
| echo "--- strong & bar ---\n"; | ||
| var_dump($bar->nextElementSibling->compareDocumentPosition($bar) === DOMNode::DOCUMENT_POSITION_PRECEDING); | ||
| var_dump($bar->compareDocumentPosition($bar->nextElementSibling) === DOMNode::DOCUMENT_POSITION_FOLLOWING); |
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How would the two strong tags compare?
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I'll add a test for this.
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Reference: https://dom.spec.whatwg.org/#dom-node-comparedocumentposition