element.go

package xmlparser

type XMLElement struct {
	Name      string
	Attrs     map[string]string
	InnerText string
	Childs    map[string][]XMLElement
	Err       error
	// filled when xpath enabled
	childs    []*XMLElement
	parent    *XMLElement
	attrs     []*xmlAttr
	localName string
	prefix    string
}

type xmlAttr struct {
	name  string
	value string
}

// SelectElements finds child elements with the specified xpath expression.
func (n *XMLElement) SelectElements(exp string) ([]*XMLElement, error) {
	return find(n, exp)
}

// SelectElement finds child elements with the specified xpath expression.
func (n *XMLElement) SelectElement(exp string) (*XMLElement, error) {
	return findOne(n, exp)
}

func (n *XMLElement) FirstChild() *XMLElement {
	if len(n.childs) > 0 {
		return n.childs[0]
	}
	return nil
}

func (n *XMLElement) LastChild() *XMLElement {
	if l := len(n.childs); l > 0 {
		return n.childs[l-1]
	}
	return nil
}

func (n *XMLElement) PrevSibling() *XMLElement {
	if n.parent != nil {
		for i, c := range n.parent.childs {
			if c == n {
				if i >= 0 {
					return n.parent.childs[i-1]
				}
				return nil
			}
		}
	}
	return nil
}

func (n *XMLElement) NextSibling() *XMLElement {
	if n.parent != nil {
		for i, c := range n.parent.childs {
			if c == n {
				if i+1 < len(n.parent.childs) {
					return n.parent.childs[i+1]
				}
				return nil
			}
		}
	}
	return nil
}