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init Extender{renderer} (#2)
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CarsonSlovoka committed Sep 26, 2022
1 parent c20a6e1 commit 10479a0
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5 changes: 5 additions & 0 deletions v2/go.mod
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module github.com/CarsonSlovoka/goldmark-highlighting/v2

go 1.19

require github.com/yuin/goldmark v1.4.14
25 changes: 25 additions & 0 deletions v2/main.go
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package highlighting

import (
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/renderer"
"github.com/yuin/goldmark/util"
)

type highlightingExtender struct {
}

func NewHighlightingExtender() goldmark.Extender {
return &highlightingExtender{}
}

// Extend adds a hashtag parser to a Goldmark parser
func (e *highlightingExtender) Extend(m goldmark.Markdown) {
// m.Parser().AddOptions() // 如果您的擴展不需要再額外自己定義ast,那就不需要再定義Parser。 Parser只是在Parse的時候,會把相關屬性塞給該ast罷了,而codeblock運用的ast用已定義的ast.KindFencedCodeBlock即可,所以不需額外定義

m.Renderer().AddOptions(
renderer.WithNodeRenderers(
util.Prioritized(NewHighlightingHTMLRenderer(), 200),
),
)
}
22 changes: 22 additions & 0 deletions v2/renderer.go
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package highlighting

import (
"github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/renderer"
"github.com/yuin/goldmark/util"
)

type highlightingHTMLRenderer struct{}

func NewHighlightingHTMLRenderer() renderer.NodeRenderer {
return &highlightingHTMLRenderer{}
}

func (r *highlightingHTMLRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
reg.Register(ast.KindFencedCodeBlock, r.nodeRendererFunc) // codeblock不需要再定義額外的ast去描述,基於原始的KindFencedCodeBlock增加額外的判斷即可
}

// nodeRendererFunc 此函數可以把結果直接寫到writer之中,就能對輸出產生影響
func (r *highlightingHTMLRenderer) nodeRendererFunc(writer util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
return 0, nil
}

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