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node_modules/@mixmark-io/domino/xmlnames.js

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+"use strict";
+// This grammar is from the XML and XML Namespace specs. It specifies whether
+// a string (such as an element or attribute name) is a valid Name or QName.
+//
+// Name           ::= NameStartChar (NameChar)*
+// NameStartChar  ::= ":" | [A-Z] | "_" | [a-z] |
+//                    [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] |
+//                    [#x370-#x37D] | [#x37F-#x1FFF] |
+//                    [#x200C-#x200D] | [#x2070-#x218F] |
+//                    [#x2C00-#x2FEF] | [#x3001-#xD7FF] |
+//                    [#xF900-#xFDCF] | [#xFDF0-#xFFFD] |
+//                    [#x10000-#xEFFFF]
+//
+// NameChar       ::= NameStartChar | "-" | "." | [0-9] |
+//                    #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
+//
+// QName          ::= PrefixedName| UnprefixedName
+// PrefixedName   ::= Prefix ':' LocalPart
+// UnprefixedName ::= LocalPart
+// Prefix         ::= NCName
+// LocalPart      ::= NCName
+// NCName         ::= Name - (Char* ':' Char*)
+//                    # An XML Name, minus the ":"
+//
+
+exports.isValidName = isValidName;
+exports.isValidQName = isValidQName;
+
+// Most names will be ASCII only. Try matching against simple regexps first
+var simplename = /^[_:A-Za-z][-.:\w]+$/;
+var simpleqname = /^([_A-Za-z][-.\w]+|[_A-Za-z][-.\w]+:[_A-Za-z][-.\w]+)$/;
+
+// If the regular expressions above fail, try more complex ones that work
+// for any identifiers using codepoints from the Unicode BMP
+var ncnamestartchars = "_A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02ff\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD";
+var ncnamechars = "-._A-Za-z0-9\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02ff\u0300-\u037D\u037F-\u1FFF\u200C\u200D\u203f\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD";
+
+var ncname = "[" + ncnamestartchars + "][" + ncnamechars + "]*";
+var namestartchars = ncnamestartchars + ":";
+var namechars = ncnamechars + ":";
+var name = new RegExp("^[" + namestartchars + "]" + "[" + namechars + "]*$");
+var qname = new RegExp("^(" + ncname + "|" + ncname + ":" + ncname + ")$");
+
+// XML says that these characters are also legal:
+// [#x10000-#xEFFFF].  So if the patterns above fail, and the
+// target string includes surrogates, then try the following
+// patterns that allow surrogates and then run an extra validation
+// step to make sure that the surrogates are in valid pairs and in
+// the right range.  Note that since the characters \uf0000 to \u1f0000
+// are not allowed, it means that the high surrogate can only go up to
+// \uDB7f instead of \uDBFF.
+var hassurrogates = /[\uD800-\uDB7F\uDC00-\uDFFF]/;
+var surrogatechars = /[\uD800-\uDB7F\uDC00-\uDFFF]/g;
+var surrogatepairs = /[\uD800-\uDB7F][\uDC00-\uDFFF]/g;
+
+// Modify the variables above to allow surrogates
+ncnamestartchars += "\uD800-\uDB7F\uDC00-\uDFFF";
+ncnamechars += "\uD800-\uDB7F\uDC00-\uDFFF";
+ncname = "[" + ncnamestartchars + "][" + ncnamechars + "]*";
+namestartchars = ncnamestartchars + ":";
+namechars = ncnamechars + ":";
+
+// Build another set of regexps that include surrogates
+var surrogatename = new RegExp("^[" + namestartchars + "]" + "[" + namechars + "]*$");
+var surrogateqname = new RegExp("^(" + ncname + "|" + ncname + ":" + ncname + ")$");
+
+function isValidName(s) {
+  if (simplename.test(s)) return true; // Plain ASCII
+  if (name.test(s)) return true; // Unicode BMP
+
+  // Maybe the tests above failed because s includes surrogate pairs
+  // Most likely, though, they failed for some more basic syntax problem
+  if (!hassurrogates.test(s)) return false;
+
+  // Is the string a valid name if we allow surrogates?
+  if (!surrogatename.test(s)) return false;
+
+  // Finally, are the surrogates all correctly paired up?
+  var chars = s.match(surrogatechars), pairs = s.match(surrogatepairs);
+  return pairs !== null && 2*pairs.length === chars.length;
+}
+
+function isValidQName(s) {
+  if (simpleqname.test(s)) return true; // Plain ASCII
+  if (qname.test(s)) return true; // Unicode BMP
+
+  if (!hassurrogates.test(s)) return false;
+  if (!surrogateqname.test(s)) return false;
+  var chars = s.match(surrogatechars), pairs = s.match(surrogatepairs);
+  return pairs !== null && 2*pairs.length === chars.length;
+}