Mihaela Mihaljevic
15de0c5344
Add PureXML.Model.TreeNode, a reference-type document tree that knows its parent and siblings. Navigation goes up and sideways (parent, nextSibling, previousSibling, ancestors, root, elementChildren, stringValue) and editing is in place (append, insert before/after, removeFromParent, replace, copy). Children are held strongly and the parent weakly; attaching a node detaches it from any prior parent and a node can never become its own ancestor. parseTree builds one from XML; TreeNode.node converts back for serialization. Closes #31
48 lines
1.7 KiB
Swift
48 lines
1.7 KiB
Swift
public extension PureXML.Model.TreeNode {
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/// Builds a mutable tree from a parsed value ``Node``, wiring up parent links.
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convenience init(_ node: PureXML.Model.Node) {
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switch node {
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case let .document(children):
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self.init(kind: .document, children: children.map(PureXML.Model.TreeNode.init))
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case let .element(element):
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self.init(
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kind: .element,
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name: element.name,
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attributes: element.attributes,
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children: element.children.map(PureXML.Model.TreeNode.init),
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)
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case let .text(value):
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self.init(kind: .text, value: value)
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case let .cdata(value):
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self.init(kind: .cdata, value: value)
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case let .comment(value):
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self.init(kind: .comment, value: value)
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case let .processingInstruction(target, data):
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self.init(kind: .processingInstruction, name: PureXML.Model.QualifiedName(target), value: data)
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}
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}
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/// Rebuilds an immutable value ``Node`` from this subtree, for serialization
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/// or value comparison.
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var node: PureXML.Model.Node {
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switch kind {
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case .document:
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.document(children.map(\.node))
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case .element:
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.element(PureXML.Model.Element(
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name: name ?? PureXML.Model.QualifiedName(""),
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attributes: attributes,
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children: children.map(\.node),
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))
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case .text:
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.text(value)
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case .cdata:
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.cdata(value)
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case .comment:
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.comment(value)
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case .processingInstruction:
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.processingInstruction(target: name?.description ?? "", data: value)
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}
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}
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}
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