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tree.go
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package gohaml
import (
"bytes"
"fmt"
"reflect"
"strings"
)
type res struct {
value string
needsResolution bool
}
type resPair struct {
key res
value res
}
type inode interface {
parent() inode
indentLevel() int
setIndentLevel(i int)
addChild(n inode)
noNewline() bool
resolve(scope map[string]interface{}, buf *bytes.Buffer, curIndent string, indent string, autoclose bool)
setParent(n inode)
nil() bool
}
type icodenode interface {
setLHS(s string)
parent() inode
indentLevel() int
setIndentLevel(i int)
addChild(n inode)
noNewline() bool
resolve(scope map[string]interface{}, buf *bytes.Buffer, curIndent string, indent string, autoclose bool)
setParent(n inode)
nil() bool
}
type node struct {
_parent inode
_remainder res
_name string
_attrs []*resPair
_noNewline bool
_autoclose bool
_indentLevel int
_children []inode
}
type tree struct {
nodes []inode
}
func newTree() (output *tree) {
output = &tree{}
return
}
func (self res) resolve(scope map[string]interface{}) (output string) {
output = self.value
if self.needsResolution {
curr := self.resolveValue(scope)
OutputSwitch:
switch t := curr; t.Kind() {
case reflect.String:
output = t.String()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
output = fmt.Sprint(t.Int())
case reflect.Float32, reflect.Float64:
output = fmt.Sprint(t.Float())
case reflect.Ptr:
if !t.IsNil() {
curr = t.Elem()
goto OutputSwitch
}
output = ""
case reflect.Interface:
curr = t.Elem()
goto OutputSwitch
default:
output = fmt.Sprint(curr)
}
}
return
}
func (self res) resolveValue(scope map[string]interface{}) (value reflect.Value) {
keyPath := strings.Split(self.value, ".")
curr := reflect.ValueOf(scope[keyPath[0]])
for _, key := range keyPath[1:] {
TypeSwitch:
switch t := curr; t.Kind() {
case reflect.Ptr:
curr = t.Elem()
goto TypeSwitch
case reflect.Struct:
curr = t.FieldByName(key)
case reflect.Map:
curr = t.MapIndex(reflect.ValueOf(key))
}
}
value = curr
return
}
func (self tree) resolve(scope map[string]interface{}, indent string, autoclose bool) (output string) {
//treeLen := self.nodes.Len()
treeLen := len(self.nodes)
buf := bytes.NewBuffer(make([]byte, 0))
for i, n := range self.nodes {
node := n
node.resolve(scope, buf, "", indent, autoclose)
if i != treeLen-1 && !node.noNewline() {
buf.WriteString("\n")
}
}
output = buf.String()
return
}
func (self node) resolve(scope map[string]interface{}, buf *bytes.Buffer, curIndent string, indent string, autoclose bool) {
remainder := self._remainder.resolve(scope)
if self._name == "doctype" {
buf.WriteString("<!DOCTYPE html")
switch strings.TrimSpace(self._remainder.value) {
case "":
buf.WriteString(" PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"")
case "Strict":
buf.WriteString(" PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\"")
case "Frameset":
buf.WriteString(" PUBLIC \"-//W3C//DTD XHTML 1.0 Frameset//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd\"")
case "1.1":
buf.WriteString(" PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\"")
case "Basic":
buf.WriteString(" PUBLIC \"-//W3C//DTD XHTML Basic 1.1//EN\" \"http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd\"")
case "Mobile":
buf.WriteString(" PUBLIC \"-//WAPFORUM//DTD XHTML Mobile 1.2//EN\" \"http://www.openmobilealliance.org/tech/DTD/xhtml-mobile12.dtd\"")
case "RDFa":
buf.WriteString(" PUBLIC \"-//W3C//DTD XHTML+RDFa 1.0//EN\" \"http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd\"")
}
buf.WriteString(">")
} else if len(self._attrs) > 0 && len(remainder) > 0 {
if len(self._name) == 0 {
self._name = "div"
}
buf.WriteString("<")
buf.WriteString(self._name)
self.resolveAttrs(scope, buf)
buf.WriteString(">")
buf.WriteString(remainder)
buf.WriteString("</")
buf.WriteString(self._name)
buf.WriteString(">")
//} else if self._attrs.Len() > 0 {
} else if len(self._attrs) > 0 {
if len(self._name) == 0 {
self._name = "div"
}
buf.WriteString("<")
buf.WriteString(self._name)
self.resolveAttrs(scope, buf)
self.outputChildren(scope, buf, curIndent, indent, autoclose)
} else if len(self._name) > 0 && len(remainder) > 0 {
buf.WriteString("<")
buf.WriteString(self._name)
buf.WriteString(">")
buf.WriteString(remainder)
buf.WriteString("</")
buf.WriteString(self._name)
buf.WriteString(">")
} else if len(self._name) > 0 {
buf.WriteString("<")
buf.WriteString(self._name)
self.outputChildren(scope, buf, curIndent, indent, autoclose)
} else {
buf.WriteString(remainder)
}
}
func (self node) outputChildren(scope map[string]interface{}, buf *bytes.Buffer, curIndent string, indent string, autoclose bool) {
ind := curIndent + indent
if self._noNewline {
ind = curIndent
}
//childLen := self._children.Len()
childLen := len(self._children)
if childLen > 0 {
buf.WriteString(">")
for i, n := range self._children {
//node := n.(inode)
node := n
if i != 0 || !self._noNewline {
buf.WriteString("\n")
buf.WriteString(ind)
}
node.resolve(scope, buf, ind, indent, autoclose)
}
if !self._noNewline {
buf.WriteString("\n")
buf.WriteString(curIndent)
}
buf.WriteString("</")
buf.WriteString(self._name)
buf.WriteString(">")
} else {
if autoclose || self._autoclose {
buf.WriteString(" />")
} else {
buf.WriteString(">")
}
}
}
func contains(value string, slice []string) bool {
for _, str := range slice {
if str == value {
return true
}
}
return false
}
func (self node) resolveAttrs(scope map[string]interface{}, buf *bytes.Buffer) {
attrMap := make(map[string]string)
// for i := 0; i < self._attrs.Len(); i++ {
for _, resPair := range self._attrs {
//resPair := self._attrs.At(i).(*resPair)
key, value := resPair.key.resolve(scope), resPair.value.resolve(scope)
if _, ok := attrMap[key]; ok {
attrMap[key] += " " + value
} else {
attrMap[key] = value
}
}
// don't iterate over map in order to preserve the order in which
// the attributes were collected.
// for key, value := range attrMap {
var seenKeys []string
for _, resPair := range self._attrs {
key := resPair.key.resolve(scope)
if contains(key, seenKeys) {
continue
}
seenKeys = append(seenKeys, key)
value := attrMap[key]
if value == "false" {
continue
}
buf.WriteString(" ")
buf.WriteString(key)
buf.WriteString("=\"")
if value == "true" {
buf.WriteString(key)
} else {
buf.WriteString(value)
}
buf.WriteString("\"")
}
}
func (self *node) addChild(n inode) {
n.setParent(self)
//self._children.Push(n)
self._children = append(self._children, n)
}
func (self *node) addAttr(key string, value string) {
keyLookup, valueLookup := true, true
if key[0] == ':' {
keyLookup = false
key = key[1:]
}
if value == "true" || value == "false" {
valueLookup = false
}
if value[0] == '"' {
valueLookup = false
value = value[1 : len(value)-1]
}
//self._attrs.Push(&resPair{res{key, keyLookup}, res{value, valueLookup}})
self._attrs = append(self._attrs, &resPair{res{key, keyLookup}, res{value, valueLookup}})
}
func (self *node) addAttrNoLookup(key string, value string) {
//self._attrs.Push(&resPair{res{key, false}, res{value, false}})
self._attrs = append(self._attrs, &resPair{res{key, false}, res{value, false}})
}
func (self *node) parent() inode {
return self._parent
}
func (self *node) indentLevel() int {
return self._indentLevel
}
func (self *node) setIndentLevel(i int) {
self._indentLevel = i
}
func (self *node) setRemainder(value string, needsResolution bool) {
self._remainder = res{value, needsResolution}
}
func (self *node) setNoNewline(b bool) {
self._noNewline = b
}
func (self *node) noNewline() bool {
return self._noNewline
}
func (self *node) setParent(n inode) {
self._parent = n
}
func (self *node) nil() bool {
return self == nil
}
type rangenode struct {
_parent inode
_indentLevel int
//_children vector.Vector
_children []inode
_lhs1, _lhs2 string
_rhs res
}
func (self *rangenode) parent() inode {
return self._parent
}
func (self *rangenode) indentLevel() int {
return self._indentLevel
}
func (self *rangenode) setIndentLevel(i int) {
self._indentLevel = i
}
func (self *rangenode) addChild(n inode) {
n.setParent(self)
//self._children.Push(n)
self._children = append(self._children, n)
}
func (self *rangenode) noNewline() bool {
return false
}
func (self *rangenode) resolve(scope map[string]interface{}, buf *bytes.Buffer, curIndent string, indent string, autoclose bool) {
//oldlhs1, oklhs1 := scope[self._lhs1]
//oldlhs2, oklhs2 := scope[self._lhs2]
__lhs1 := scope[self._lhs1]
__lhs2 := scope[self._lhs2]
value := self._rhs.resolveValue(scope)
switch t := value; t.Kind() {
case reflect.Slice:
for i := 0; i < t.Len(); i++ {
v := t.Index(i)
var iv interface{}
switch t := v; t.Kind() {
case reflect.String:
iv = t.String()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
iv = fmt.Sprint(t.Int())
case reflect.Float32, reflect.Float64:
iv = fmt.Sprint(t.Float())
case reflect.Struct:
iv = t.Interface()
}
scope[self._lhs1] = i
scope[self._lhs2] = iv
for _, n := range self._children {
node := n
node.resolve(scope, buf, curIndent, indent, autoclose)
if i != t.Len()-1 && !node.noNewline() {
buf.WriteString("\n")
buf.WriteString(curIndent)
}
}
}
case reflect.Array:
for i := 0; i < t.Len(); i++ {
v := t.Index(i)
var iv interface{}
switch t := v; t.Kind() {
case reflect.String:
iv = t.String()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
iv = fmt.Sprint(t.Int())
case reflect.Float32, reflect.Float64:
iv = fmt.Sprint(t.Float())
case reflect.Struct:
iv = t.Interface()
}
scope[self._lhs1] = i
scope[self._lhs2] = iv
for _, n := range self._children {
node := n
node.resolve(scope, buf, curIndent, indent, autoclose)
if i != t.Len()-1 && !node.noNewline() {
buf.WriteString("\n")
buf.WriteString(curIndent)
}
}
}
case reflect.Map:
for i, k := range t.MapKeys() {
v := t.MapIndex(k)
var iv interface{}
switch t := k; t.Kind() {
case reflect.String:
iv = t.String()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
iv = fmt.Sprint(t.Int())
case reflect.Float32, reflect.Float64:
iv = fmt.Sprint(t.Float())
}
scope[self._lhs1] = iv
switch t := v; t.Kind() {
case reflect.String:
iv = t.String()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
iv = fmt.Sprint(t.Int())
case reflect.Float32, reflect.Float64:
iv = fmt.Sprint(t.Float())
}
scope[self._lhs2] = iv
for _, n := range self._children {
node := n
node.resolve(scope, buf, curIndent, indent, autoclose)
if i != t.Len()-1 && !node.noNewline() {
buf.WriteString("\n")
buf.WriteString(curIndent)
}
}
}
}
scope[self._lhs1] = __lhs1 // {oldlhs1, oklhs1}
scope[self._lhs2] = __lhs2 // {oldlhs2, oklhs2}
}
func (self *rangenode) setParent(n inode) {
self._parent = n
}
func (self *rangenode) nil() bool {
return self == nil
}
type declassnode struct {
_parent inode
_indentLevel int
//_children vector.Vector
_children []inode
_lhs string
_rhs interface{}
}
func (self *declassnode) parent() inode {
return self._parent
}
func (self *declassnode) indentLevel() int {
return self._indentLevel
}
func (self *declassnode) setIndentLevel(i int) {
self._indentLevel = i
}
func (self *declassnode) addChild(n inode) {
n.setParent(self)
//self._children.Push(n)
self._children = append(self._children, n)
}
func (self *declassnode) noNewline() bool {
return false
}
func (self *declassnode) resolve(scope map[string]interface{}, buf *bytes.Buffer, curIndent string, indent string, autoclose bool) {
scope[self._lhs] = self._rhs
}
func (self *declassnode) setParent(n inode) {
self._parent = n
}
func (self *declassnode) nil() bool {
return self == nil
}
func (self *declassnode) setLHS(s string) {
self._lhs = s
}
type vdeclassnode struct {
_parent inode
_indentLevel int
//_children vector.Vector
_children []inode
_lhs string
_rhs res
}
func (self *vdeclassnode) parent() inode {
return self._parent
}
func (self *vdeclassnode) indentLevel() int {
return self._indentLevel
}
func (self *vdeclassnode) setIndentLevel(i int) {
self._indentLevel = i
}
func (self *vdeclassnode) addChild(n inode) {
n.setParent(self)
//self._children.Push(n)
self._children = append(self._children, n)
}
func (self *vdeclassnode) noNewline() bool {
return false
}
func (self *vdeclassnode) resolve(scope map[string]interface{}, buf *bytes.Buffer, curIndent string, indent string, autoclose bool) {
scope[self._lhs] = self._rhs.resolve(scope)
}
func (self *vdeclassnode) setParent(n inode) {
self._parent = n
}
func (self *vdeclassnode) nil() bool {
return self == nil
}
func (self *vdeclassnode) setLHS(s string) {
self._lhs = s
}