Function normalizespaceFunc

func.go:412–446

normalizespaceFunc is XPath functions normalize-space(string?)

(arg1 query)

// normalizespaceFunc is XPath functions normalize-space(string?)
func normalizespaceFunc(arg1 query) func(query, iterator) interface{} {
	return func(_ query, t iterator) interface{} {
		var m string
		switch typ := functionArgs(arg1).Evaluate(t).(type) {
		case string:
			m = typ
		case query:
			node := typ.Select(t)
			if node == nil {
				return ""
			}
			m = node.Value()
		}
		var b = builderPool.Get().(stringBuilder)
		b.Grow(len(m))

		runeStr := []rune(strings.TrimSpace(m))
		l := len(runeStr)
		for i := range runeStr {
			r := runeStr[i]
			isSpace := unicode.IsSpace(r)
			if !(isSpace && (i+1 < l && unicode.IsSpace(runeStr[i+1]))) {
				if isSpace {
					r = ' '
				}
				b.WriteRune(r)
			}
		}
		result := b.String()
		b.Reset()
		builderPool.Put(b)

		return result
	}
}

// substringFunc is XPath functions substring function returns a part of a given string.
func substringFunc(arg1, arg2, arg3 query) func(query, iterator) interface{} {