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html.go
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html.go
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/*
*
* Copyright 2022 indentlang authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package builtins
import (
"github.com/dvaumoron/indentlang/parser"
"github.com/dvaumoron/indentlang/types"
)
const openElement types.String = "<"
const openCloseElement types.String = "</"
const closeElement types.String = ">"
const closeOpenElement types.String = "/>"
const space types.String = " "
const equalQuote types.String = "=\""
const quote types.String = "\""
func addXmlTag(base types.BaseEnvironment, name string) {
base.StoreStr(name, createXmlTag(name))
}
func createXmlTag(name string) types.NativeAppliable {
wrappedName := types.String(name)
return types.MakeNativeAppliable(func(env types.Environment, itArgs types.Iterator) types.Object {
attrs := types.NewList()
childs := types.NewList()
types.ForEach(itArgs, func(arg types.Object) bool {
switch casted := arg.Eval(env).(type) {
case types.NoneType:
// ignore None
case *types.List:
if casted.HasCategory(parser.AttributeName) {
attrs.Add(casted)
} else {
childs.Add(casted)
}
default:
childs.Add(casted)
}
return true
})
res := types.NewList(openElement, wrappedName)
types.ForEach(attrs, func(value types.Object) bool {
attr, ok := value.(types.Iterable)
if !ok {
return true
}
itAttr := attr.Iter()
defer itAttr.Close()
attrName, ok := itAttr.Next()
if !ok {
return true
}
res.Add(space)
res.Add(attrName)
attrValue, ok := itAttr.Next()
if ok {
res.Add(equalQuote)
res.Add(attrValue)
res.Add(quote)
}
return true
})
if childs.Size() == 0 {
res.Add(closeOpenElement)
} else {
res.Add(closeElement)
types.ForEach(childs, func(value types.Object) bool {
res.Add(space)
res.Add(value)
return true
})
res.Add(openCloseElement)
res.Add(wrappedName)
res.Add(closeElement)
}
return res
})
}