Mihaela Mihaljevic
1646128b35
Templates carry their in-scope xmlns bindings into match patterns (match cache keyed on pattern plus bindings) and instantiated expressions, resolving prefixed name tests by namespace URI; with bindings supplied an unprefixed test selects only the null namespace, the XPath 1.0 rule. Instruction-scope capture includes the default declaration: xsl:element honors in-scope xmlns="uri" for unprefixed names, xmlns="" keeps them namespace-free, and an unusable created name drops the wrapper, keeping content. Xalan baseline 263 -> 218 (namespace 41 -> 13).
59 lines
2.1 KiB
Swift
59 lines
2.1 KiB
Swift
extension PureXML.XSLT {
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/// One produced item: a node for the result tree, or an attribute to attach to
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/// the enclosing element.
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enum ResultItem {
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case node(PureXML.Model.Node)
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case attribute(PureXML.Model.Attribute)
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}
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/// The evaluation context during instantiation.
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struct XSLTContext {
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var node: PureXML.Model.TreeNode
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/// The current node when it is not a tree node (an attribute or
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/// namespace node); `node` then holds its owner element.
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var current: PureXML.XPath.Node?
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var position: Int
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var size: Int
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var variables: [String: PureXML.XPath.Value]
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/// The XPath context node: `current` when set, else the tree node.
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var focus: PureXML.XPath.Node {
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current ?? .tree(node)
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}
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/// The mode of the template currently being instantiated, so `apply-imports`
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/// re-applies in the same mode.
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var mode: String?
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/// The import precedence of the template currently being instantiated, so
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/// `apply-imports` considers only templates below it. `.max` outside a template.
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var importPrecedence: Int
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/// The stylesheet xmlns bindings of the template being instantiated,
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/// so prefixed names in its expressions resolve by URI.
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var namespaces: [String: String] = [:]
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init(
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node: PureXML.Model.TreeNode,
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current: PureXML.XPath.Node? = nil,
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position: Int,
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size: Int,
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variables: [String: PureXML.XPath.Value],
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mode: String? = nil,
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importPrecedence: Int = .max,
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) {
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self.node = node
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self.current = current
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self.position = position
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self.size = size
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self.variables = variables
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self.mode = mode
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self.importPrecedence = importPrecedence
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}
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}
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/// Shared, mutable signal that an `xsl:message terminate="yes"` fired, carrying
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/// its text. A reference type so the value-semantics transformer can set it.
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final class Termination {
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var message: String?
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}
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}
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