Mihaela Mihaljevic
cd2f30a262
Broaden the serializer and writer options from the audit: - attributeQuote selects single or double quotes; the active quote is escaped in values (apostrophe as ' in single-quote mode). - lineEnding controls the inserted newline (set to CRLF for \r\n output). - xml:space=preserve suppresses pretty-print indentation for an element and its subtree; xml:space=default re-enables it. - Writer gains writeStartElementNS(prefix:localName:namespaceURI:) and writeNamespace(prefix:uri:), so callers no longer hand-format prefixes and xmlns attributes. CDATA-vs-escape and entity re-escaping strategies are left as a follow-up; the current escaping is the safe default. Closes #91
42 lines
1.5 KiB
Swift
42 lines
1.5 KiB
Swift
extension PureXML.Emitting {
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/// The shared XML output escaping rules, used by both the tree serializer and
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/// the incremental writer so their output is identical. Element content
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/// escapes the markup characters; attribute values additionally escape the
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/// quote and the whitespace characters as numeric references (matching
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/// libxml2), so attributes survive attribute-value normalization.
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enum Escaping {
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static func text(_ value: String) -> String {
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var result = ""
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for character in value {
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switch character {
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case "&": result += "&"
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case "<": result += "<"
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case ">": result += ">"
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default: result.append(character)
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}
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}
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return result
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}
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static func attribute(_ value: String, quote: Character = "\"") -> String {
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var result = ""
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for character in value {
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if character == quote {
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result += quote == "'" ? "'" : """
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continue
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}
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switch character {
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case "&": result += "&"
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case "<": result += "<"
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case ">": result += ">"
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case "\t": result += "	"
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case "\n": result += " "
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case "\r": result += " "
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default: result.append(character)
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}
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}
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return result
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}
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}
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}
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