587 lines
13 KiB
Go
587 lines
13 KiB
Go
// This work is subject to the CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
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// license. Its contents can be found at:
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// http://creativecommons.org/publicdomain/zero/1.0/
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package xmlx
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import (
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"bytes"
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"encoding/xml"
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"fmt"
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"strconv"
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"strings"
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)
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const (
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NT_ROOT = iota
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NT_DIRECTIVE
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NT_PROCINST
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NT_COMMENT
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NT_ELEMENT
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)
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// IndentPrefix holds the value for a single identation level, if one
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// chooses to want indentation in the node.String() and node.Bytes() output.
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// This would normally be set to a single tab, or a number of spaces.
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var IndentPrefix = ""
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type Attr struct {
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Name xml.Name // Attribute namespace and name.
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Value string // Attribute value.
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}
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type Node struct {
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Type byte // Node type.
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Name xml.Name // Node namespace and name.
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Children []*Node // Child nodes.
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Attributes []*Attr // Node attributes.
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Parent *Node // Parent node.
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Value string // Node value.
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Target string // procinst field.
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}
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func NewNode(tid byte) *Node {
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n := new(Node)
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n.Type = tid
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n.Children = make([]*Node, 0, 10)
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n.Attributes = make([]*Attr, 0, 10)
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return n
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}
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// This wraps the standard xml.Unmarshal function and supplies this particular
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// node as the content to be unmarshalled.
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func (this *Node) Unmarshal(obj interface{}) error {
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return xml.NewDecoder(bytes.NewBuffer(this.bytes(0))).Decode(obj)
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}
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// Get node value as string
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func (this *Node) S(namespace, name string) string {
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node := rec_SelectNode(this, namespace, name)
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if node != nil {
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return node.Value
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}
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return ""
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}
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// Get node value as int
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func (this *Node) I(namespace, name string) int {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseInt(node.Value, 10, 0)
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return int(n)
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}
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return 0
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}
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// Get node value as int8
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func (this *Node) I8(namespace, name string) int8 {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseInt(node.Value, 10, 8)
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return int8(n)
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}
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return 0
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}
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// Get node value as int16
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func (this *Node) I16(namespace, name string) int16 {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseInt(node.Value, 10, 16)
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return int16(n)
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}
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return 0
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}
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// Get node value as int32
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func (this *Node) I32(namespace, name string) int32 {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseInt(node.Value, 10, 32)
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return int32(n)
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}
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return 0
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}
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// Get node value as int64
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func (this *Node) I64(namespace, name string) int64 {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseInt(node.Value, 10, 64)
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return n
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}
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return 0
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}
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// Get node value as uint
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func (this *Node) U(namespace, name string) uint {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseUint(node.Value, 10, 0)
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return uint(n)
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}
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return 0
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}
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// Get node value as uint8
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func (this *Node) U8(namespace, name string) uint8 {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseUint(node.Value, 10, 8)
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return uint8(n)
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}
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return 0
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}
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// Get node value as uint16
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func (this *Node) U16(namespace, name string) uint16 {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseUint(node.Value, 10, 16)
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return uint16(n)
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}
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return 0
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}
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// Get node value as uint32
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func (this *Node) U32(namespace, name string) uint32 {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseUint(node.Value, 10, 32)
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return uint32(n)
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}
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return 0
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}
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// Get node value as uint64
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func (this *Node) U64(namespace, name string) uint64 {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseUint(node.Value, 10, 64)
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return n
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}
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return 0
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}
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// Get node value as float32
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func (this *Node) F32(namespace, name string) float32 {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseFloat(node.Value, 32)
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return float32(n)
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}
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return 0
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}
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// Get node value as float64
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func (this *Node) F64(namespace, name string) float64 {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseFloat(node.Value, 64)
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return n
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}
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return 0
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}
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// Get node value as bool
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func (this *Node) B(namespace, name string) bool {
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node := rec_SelectNode(this, namespace, name)
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if node != nil && node.Value != "" {
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n, _ := strconv.ParseBool(node.Value)
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return n
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}
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return false
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}
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// Get attribute value as string
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func (this *Node) As(namespace, name string) string {
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for _, v := range this.Attributes {
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if (namespace == "*" || namespace == v.Name.Space) && name == v.Name.Local {
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return v.Value
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}
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}
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return ""
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}
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// Get attribute value as int
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func (this *Node) Ai(namespace, name string) int {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseInt(s, 10, 0)
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return int(n)
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}
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return 0
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}
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// Get attribute value as int8
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func (this *Node) Ai8(namespace, name string) int8 {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseInt(s, 10, 8)
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return int8(n)
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}
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return 0
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}
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// Get attribute value as int16
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func (this *Node) Ai16(namespace, name string) int16 {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseInt(s, 10, 16)
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return int16(n)
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}
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return 0
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}
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// Get attribute value as int32
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func (this *Node) Ai32(namespace, name string) int32 {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseInt(s, 10, 32)
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return int32(n)
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}
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return 0
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}
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// Get attribute value as int64
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func (this *Node) Ai64(namespace, name string) int64 {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseInt(s, 10, 64)
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return n
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}
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return 0
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}
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// Get attribute value as uint
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func (this *Node) Au(namespace, name string) uint {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseUint(s, 10, 0)
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return uint(n)
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}
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return 0
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}
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// Get attribute value as uint8
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func (this *Node) Au8(namespace, name string) uint8 {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseUint(s, 10, 8)
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return uint8(n)
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}
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return 0
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}
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// Get attribute value as uint16
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func (this *Node) Au16(namespace, name string) uint16 {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseUint(s, 10, 16)
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return uint16(n)
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}
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return 0
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}
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// Get attribute value as uint32
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func (this *Node) Au32(namespace, name string) uint32 {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseUint(s, 10, 32)
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return uint32(n)
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}
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return 0
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}
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// Get attribute value as uint64
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func (this *Node) Au64(namespace, name string) uint64 {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseUint(s, 10, 64)
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return n
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}
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return 0
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}
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// Get attribute value as float32
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func (this *Node) Af32(namespace, name string) float32 {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseFloat(s, 32)
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return float32(n)
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}
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return 0
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}
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// Get attribute value as float64
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func (this *Node) Af64(namespace, name string) float64 {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseFloat(s, 64)
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return n
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}
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return 0
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}
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// Get attribute value as bool
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func (this *Node) Ab(namespace, name string) bool {
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s := this.As(namespace, name)
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if s != "" {
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n, _ := strconv.ParseBool(s)
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return n
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}
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return false
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}
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// Returns true if this node has the specified attribute. False otherwise.
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func (this *Node) HasAttr(namespace, name string) bool {
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for _, v := range this.Attributes {
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if namespace != "*" && namespace != v.Name.Space {
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continue
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}
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if name == "*" || name == v.Name.Local {
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return true
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}
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}
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return false
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}
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// Select single node by name
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func (this *Node) SelectNode(namespace, name string) *Node {
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return rec_SelectNode(this, namespace, name)
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}
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func rec_SelectNode(cn *Node, namespace, name string) *Node {
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if (namespace == "*" || cn.Name.Space == namespace) && (name == "*" || cn.Name.Local == name) {
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return cn
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}
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var tn *Node
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for _, v := range cn.Children {
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if tn = rec_SelectNode(v, namespace, name); tn != nil {
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return tn
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}
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}
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return nil
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}
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// Select multiple nodes by name
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func (this *Node) SelectNodes(namespace, name string) []*Node {
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list := make([]*Node, 0, 16)
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rec_SelectNodes(this, namespace, name, &list, false)
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return list
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}
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// Select multiple nodes by name
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func (this *Node) SelectNodesRecursive(namespace, name string) []*Node {
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list := make([]*Node, 0, 16)
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rec_SelectNodes(this, namespace, name, &list, true)
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return list
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}
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func rec_SelectNodes(cn *Node, namespace, name string, list *[]*Node, recurse bool) {
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if (namespace == "*" || cn.Name.Space == namespace) && (name == "*" || cn.Name.Local == name) {
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*list = append(*list, cn)
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if !recurse {
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return
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}
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}
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for _, v := range cn.Children {
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rec_SelectNodes(v, namespace, name, list, recurse)
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}
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}
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func (this *Node) RemoveNameSpace() {
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this.Name.Space = ""
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// this.RemoveAttr("xmlns") //This is questionable
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for _, v := range this.Children {
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v.RemoveNameSpace()
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}
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}
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func (this *Node) RemoveAttr(name string) {
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for i, v := range this.Attributes {
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if name == v.Name.Local {
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//Delete it
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this.Attributes = append(this.Attributes[:i], this.Attributes[i+1:]...)
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}
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}
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}
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func (this *Node) SetAttr(name, value string) {
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for _, v := range this.Attributes {
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if name == v.Name.Local {
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v.Value = value
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return
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}
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}
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//Add
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attr := new(Attr)
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attr.Name.Local = name
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attr.Name.Space = ""
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attr.Value = value
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this.Attributes = append(this.Attributes, attr)
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return
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}
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// Convert node to appropriate []byte representation based on it's @Type.
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// Note that NT_ROOT is a special-case empty node used as the root for a
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// Document. This one has no representation by itself. It merely forwards the
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// String() call to it's child nodes.
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func (this *Node) Bytes() []byte { return this.bytes(0) }
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func (this *Node) bytes(indent int) (b []byte) {
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switch this.Type {
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case NT_PROCINST:
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b = this.printProcInst(indent)
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case NT_COMMENT:
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b = this.printComment(indent)
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case NT_DIRECTIVE:
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b = this.printDirective(indent)
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case NT_ELEMENT:
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b = this.printElement(indent)
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case NT_ROOT:
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b = this.printRoot(indent)
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}
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return
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}
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// Convert node to appropriate string representation based on it's @Type.
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// Note that NT_ROOT is a special-case empty node used as the root for a
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// Document. This one has no representation by itself. It merely forwards the
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// String() call to it's child nodes.
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func (this *Node) String() (s string) {
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return string(this.bytes(0))
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}
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func (this *Node) printRoot(indent int) []byte {
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var b bytes.Buffer
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for _, v := range this.Children {
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b.Write(v.bytes(indent))
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}
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return b.Bytes()
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}
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func (this *Node) printProcInst(indent int) []byte {
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return []byte("<?" + this.Target + " " + this.Value + "?>")
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}
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func (this *Node) printComment(indent int) []byte {
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return []byte("<!-- " + this.Value + " -->")
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}
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func (this *Node) printDirective(indent int) []byte {
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return []byte("<!" + this.Value + "!>")
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}
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func (this *Node) printElement(indent int) []byte {
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var b bytes.Buffer
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lineSuffix, linePrefix := "", strings.Repeat(IndentPrefix, indent)
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if len(IndentPrefix) > 0 {
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lineSuffix = "\n"
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}
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b.WriteString(linePrefix)
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if len(this.Name.Space) > 0 {
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b.WriteRune('<')
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b.WriteString(this.Name.Space)
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b.WriteRune(':')
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b.WriteString(this.Name.Local)
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} else {
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b.WriteRune('<')
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b.WriteString(this.Name.Local)
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}
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for _, v := range this.Attributes {
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if len(v.Name.Space) > 0 {
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prefix := this.spacePrefix(v.Name.Space)
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b.WriteString(fmt.Sprintf(` %s:%s="%s"`, prefix, v.Name.Local, v.Value))
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} else {
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b.WriteString(fmt.Sprintf(` %s="%s"`, v.Name.Local, v.Value))
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}
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}
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if len(this.Children) == 0 && len(this.Value) == 0 {
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b.WriteString(" />")
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b.WriteString(lineSuffix)
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return b.Bytes()
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}
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b.WriteRune('>')
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if len(this.Value) == 0 {
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b.WriteString(lineSuffix)
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}
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for _, v := range this.Children {
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b.Write(v.bytes(indent + 1))
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}
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b.WriteString(this.Value)
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if len(this.Value) == 0 {
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b.WriteString(linePrefix)
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}
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if len(this.Name.Space) > 0 {
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b.WriteString("</")
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b.WriteString(this.Name.Space)
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b.WriteRune(':')
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b.WriteString(this.Name.Local)
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b.WriteRune('>')
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} else {
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b.WriteString("</")
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b.WriteString(this.Name.Local)
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b.WriteRune('>')
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}
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b.WriteString(lineSuffix)
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return b.Bytes()
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}
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// spacePrefix resolves the given space (e.g. a url) to the prefix it was
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// assigned by an attribute by the current node, or one of its parents.
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func (this *Node) spacePrefix(space string) string {
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for _, attr := range this.Attributes {
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if attr.Name.Space == "xmlns" && attr.Value == space {
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return attr.Name.Local
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}
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}
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if this.Parent == nil {
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return space
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}
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return this.Parent.spacePrefix(space)
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}
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// Add a child node
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func (this *Node) AddChild(t *Node) {
|
|
if t.Parent != nil {
|
|
t.Parent.RemoveChild(t)
|
|
}
|
|
t.Parent = this
|
|
this.Children = append(this.Children, t)
|
|
}
|
|
|
|
// Remove a child node
|
|
func (this *Node) RemoveChild(t *Node) {
|
|
p := -1
|
|
for i, v := range this.Children {
|
|
if v == t {
|
|
p = i
|
|
break
|
|
}
|
|
}
|
|
|
|
if p == -1 {
|
|
return
|
|
}
|
|
|
|
copy(this.Children[p:], this.Children[p+1:])
|
|
this.Children = this.Children[0 : len(this.Children)-1]
|
|
|
|
t.Parent = nil
|
|
}
|