mirror of
https://github.com/gohugoio/hugo.git
synced 2024-07-07 09:36:03 +00:00
2681633db8
E.g.:
```
> foo
> bar
{.myclass}
```
There are some current limitations: For tables you can currently only apply it to the full table, and for lists the ul/ol-nodes only, e.g.:
```
* Fruit
* Apple
* Orange
* Banana
{.fruits}
* Dairy
* Milk
* Cheese
{.dairies}
{.list}
```
Fixes #7548
120 lines
3 KiB
Go
120 lines
3 KiB
Go
package attributes
|
|
|
|
import (
|
|
"github.com/yuin/goldmark"
|
|
"github.com/yuin/goldmark/ast"
|
|
"github.com/yuin/goldmark/parser"
|
|
"github.com/yuin/goldmark/text"
|
|
"github.com/yuin/goldmark/util"
|
|
)
|
|
|
|
// This extenion is based on/inspired by https://github.com/mdigger/goldmark-attributes
|
|
// MIT License
|
|
// Copyright (c) 2019 Dmitry Sedykh
|
|
|
|
var (
|
|
kindAttributesBlock = ast.NewNodeKind("AttributesBlock")
|
|
|
|
defaultParser = new(attrParser)
|
|
defaultTransformer = new(transformer)
|
|
attributes goldmark.Extender = new(attrExtension)
|
|
)
|
|
|
|
func New() goldmark.Extender {
|
|
return attributes
|
|
}
|
|
|
|
type attrExtension struct{}
|
|
|
|
func (a *attrExtension) Extend(m goldmark.Markdown) {
|
|
m.Parser().AddOptions(
|
|
parser.WithBlockParsers(
|
|
util.Prioritized(defaultParser, 100)),
|
|
parser.WithASTTransformers(
|
|
util.Prioritized(defaultTransformer, 100),
|
|
),
|
|
)
|
|
}
|
|
|
|
type attrParser struct{}
|
|
|
|
func (a *attrParser) CanAcceptIndentedLine() bool {
|
|
return false
|
|
}
|
|
|
|
func (a *attrParser) CanInterruptParagraph() bool {
|
|
return true
|
|
}
|
|
|
|
func (a *attrParser) Close(node ast.Node, reader text.Reader, pc parser.Context) {
|
|
}
|
|
|
|
func (a *attrParser) Continue(node ast.Node, reader text.Reader, pc parser.Context) parser.State {
|
|
return parser.Close
|
|
}
|
|
|
|
func (a *attrParser) Open(parent ast.Node, reader text.Reader, pc parser.Context) (ast.Node, parser.State) {
|
|
if attrs, ok := parser.ParseAttributes(reader); ok {
|
|
// add attributes
|
|
var node = &attributesBlock{
|
|
BaseBlock: ast.BaseBlock{},
|
|
}
|
|
for _, attr := range attrs {
|
|
node.SetAttribute(attr.Name, attr.Value)
|
|
}
|
|
return node, parser.NoChildren
|
|
}
|
|
return nil, parser.RequireParagraph
|
|
}
|
|
|
|
func (a *attrParser) Trigger() []byte {
|
|
return []byte{'{'}
|
|
}
|
|
|
|
type attributesBlock struct {
|
|
ast.BaseBlock
|
|
}
|
|
|
|
func (a *attributesBlock) Dump(source []byte, level int) {
|
|
attrs := a.Attributes()
|
|
list := make(map[string]string, len(attrs))
|
|
for _, attr := range attrs {
|
|
var (
|
|
name = util.BytesToReadOnlyString(attr.Name)
|
|
value = util.BytesToReadOnlyString(util.EscapeHTML(attr.Value.([]byte)))
|
|
)
|
|
list[name] = value
|
|
}
|
|
ast.DumpHelper(a, source, level, list, nil)
|
|
}
|
|
|
|
func (a *attributesBlock) Kind() ast.NodeKind {
|
|
return kindAttributesBlock
|
|
}
|
|
|
|
type transformer struct{}
|
|
|
|
func (a *transformer) Transform(node *ast.Document, reader text.Reader, pc parser.Context) {
|
|
var attributes = make([]ast.Node, 0, 500)
|
|
ast.Walk(node, func(node ast.Node, entering bool) (ast.WalkStatus, error) {
|
|
if entering && node.Kind() == kindAttributesBlock && !node.HasBlankPreviousLines() {
|
|
attributes = append(attributes, node)
|
|
return ast.WalkSkipChildren, nil
|
|
}
|
|
return ast.WalkContinue, nil
|
|
})
|
|
|
|
for _, attr := range attributes {
|
|
if prev := attr.PreviousSibling(); prev != nil &&
|
|
prev.Type() == ast.TypeBlock {
|
|
for _, attr := range attr.Attributes() {
|
|
if _, found := prev.Attribute(attr.Name); !found {
|
|
prev.SetAttribute(attr.Name, attr.Value)
|
|
}
|
|
}
|
|
}
|
|
// remove attributes node
|
|
attr.Parent().RemoveChild(attr.Parent(), attr)
|
|
}
|
|
}
|