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package mhtml
import (
"fmt"
"io"
"github.com/mmarkdown/mmark/v2/lang"
"github.com/mmarkdown/mmark/v2/mast"
"github.com/gomarkdown/markdown/ast"
)
var (
// IndexReturnLinkContents is the string to use for index item return links.
IndexReturnLinkContents = "<sup>[go]</sup>"
)
// RenderOptions are options for RenderHook.
type RendererOptions struct {
Language lang.Lang
}
// RenderHook is used to render mmark specific AST nodes.
func (r RendererOptions) RenderHook(w io.Writer, node ast.Node, entering bool) (ast.WalkStatus, bool) {
switch node := node.(type) {
case *ast.Footnotes:
if !entering {
io.WriteString(w, "</h1>\n")
return ast.GoToNext, true
}
io.WriteString(w, `<h1 id="footnote-section">`)
io.WriteString(w, r.Language.Footnotes())
case *mast.Bibliography:
if !entering {
io.WriteString(w, "</dl>\n")
return ast.GoToNext, true
}
io.WriteString(w, "<h1 id=\"bibliography-section\">"+r.Language.Bibliography()+"</h1>\n<div class=\"bibliography\">\n")
io.WriteString(w, "<dl>\n")
return ast.GoToNext, true
case *mast.BibliographyItem:
if !entering {
return ast.GoToNext, true
}
bibliographyItem(w, node, entering)
return ast.GoToNext, true
case *mast.Title:
// we out if in mmark.go with a hack to capture it.
return ast.GoToNext, true
case *mast.DocumentIndex:
if !entering {
io.WriteString(w, "\n</div>\n")
return ast.GoToNext, true
}
io.WriteString(w, "<h1 id=\"index-section\">"+r.Language.Index()+"</h1>\n<div class=\"index\">\n")
return ast.GoToNext, true
case *mast.IndexLetter:
if !entering {
io.WriteString(w, "</ul>\n")
io.WriteString(w, "</dd>\n")
io.WriteString(w, "</dl>\n")
return ast.GoToNext, true
}
// use id= idxref idxitm.
io.WriteString(w, "<dl>\n")
io.WriteString(w, `<dt>`)
io.WriteString(w, string(node.Literal))
io.WriteString(w, "</dt>\n")
io.WriteString(w, "<dd>\n")
io.WriteString(w, "<ul>\n")
return ast.GoToNext, true
case *mast.IndexItem:
if !entering {
io.WriteString(w, "</li>\n")
return ast.GoToNext, true
}
io.WriteString(w, "<li>\n")
w.Write(node.Item)
return ast.GoToNext, true
case *mast.IndexSubItem:
if !entering {
if lastSubItem(node) {
io.WriteString(w, "</ul>\n")
}
io.WriteString(w, "</li>\n")
return ast.GoToNext, true
}
if firstSubItem(node) {
io.WriteString(w, "<ul>\n")
}
io.WriteString(w, "<li>\n")
w.Write(node.Subitem)
return ast.GoToNext, true
case *mast.IndexLink:
if !entering {
io.WriteString(w, "</a>")
return ast.GoToNext, true
}
io.WriteString(w, ` <a class="index-return" href="#`+string(node.Destination)+`">`)
io.WriteString(w, IndexReturnLinkContents)
return ast.GoToNext, true
case *mast.ReferenceBlock:
// ignore these for HTML output as this is XML and not used at all.
return ast.GoToNext, true
}
return ast.GoToNext, false
}
func bibliographyItem(w io.Writer, bib *mast.BibliographyItem, entering bool) {
io.WriteString(w, `<dt class="bibliography-cite" id="`+string(bib.Anchor)+`">`+fmt.Sprintf("[%s]", bib.Anchor)+"</dt>\n")
io.WriteString(w, `<dd>`)
defer io.WriteString(w, "</dd>\n")
if bib.Reference == nil {
return
}
for _, author := range bib.Reference.Front.Authors {
io.WriteString(w, `<span class="bibliography-author">`+author.Fullname+"</span>\n")
}
io.WriteString(w, `<span class="bibliography-title">`+bib.Reference.Front.Title+"</span>\n")
if bib.Reference.Target != "" {
io.WriteString(w, `<a class="bliography-target" href="`+bib.Reference.Target+"\">"+bib.Reference.Target+"</a>\n")
}
if bib.Reference.Front.Date.Year != "" {
io.WriteString(w, `<date class="bibliography-date">`+bib.Reference.Front.Date.Year+"</date>\n")
}
}
func firstSubItem(node ast.Node) bool {
prev := ast.GetPrevNode(node)
if prev == nil {
return true
}
for prev != nil {
_, ok := prev.(*mast.IndexSubItem)
if ok {
return false
}
prev = ast.GetPrevNode(prev)
}
return true
}
func lastSubItem(node ast.Node) bool {
next := ast.GetNextNode(node)
if next == nil {
return true
}
for next != nil {
_, ok := next.(*mast.IndexSubItem)
if ok {
return false
}
next = ast.GetNextNode(next)
}
return true
}
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