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vditor_wysiwyg.go
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vditor_wysiwyg.go
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// Lute - 一款结构化的 Markdown 引擎，支持 Go 和 JavaScript
// Copyright (c) 2019-present, b3log.org
//
// Lute is licensed under Mulan PSL v2.
// You can use this software according to the terms and conditions of the Mulan PSL v2.
// You may obtain a copy of Mulan PSL v2 at:
// http:https://license.coscl.org.cn/MulanPSL2
// THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
// See the Mulan PSL v2 for more details.
package lute
import (
"bytes"
"strconv"
"strings"
"github.com/88250/lute/ast"
"github.com/88250/lute/editor"
"github.com/88250/lute/html"
"github.com/88250/lute/html/atom"
"github.com/88250/lute/parse"
"github.com/88250/lute/render"
"github.com/88250/lute/util"
)
// Md2HTML 将 markdown 转换为标准 HTML，用于源码模式预览。
func (lute *Lute) Md2HTML(markdown string) (sHTML string) {
sHTML = lute.MarkdownStr("", markdown)
return
}
// SpinVditorDOM 自旋 Vditor DOM，用于所见即所得模式下的编辑。
func (lute *Lute) SpinVditorDOM(ivHTML string) (ovHTML string) {
ivHTML = strings.ReplaceAll(ivHTML, editor.FrontEndCaret, editor.Caret)
markdown := lute.vditorDOM2Md(ivHTML)
tree := parse.Parse("", []byte(markdown), lute.ParseOptions)
renderer := render.NewVditorRenderer(tree, lute.RenderOptions)
output := renderer.Render()
ovHTML = strings.ReplaceAll(string(output), editor.Caret, editor.FrontEndCaret)
return
}
// HTML2VditorDOM 将 HTML 转换为 Vditor DOM，用于所见即所得模式下粘贴。
func (lute *Lute) HTML2VditorDOM(sHTML string) (vHTML string) {
markdown, err := lute.HTML2Markdown(sHTML)
if nil != err {
vHTML = err.Error()
return
}
tree := parse.Parse("", []byte(markdown), lute.ParseOptions)
renderer := render.NewVditorRenderer(tree, lute.RenderOptions)
for nodeType, rendererFunc := range lute.HTML2VditorDOMRendererFuncs {
renderer.ExtRendererFuncs[nodeType] = rendererFunc
}
output := renderer.Render()
vHTML = string(output)
return
}
// VditorDOM2HTML 将 Vditor DOM 转换为 HTML，用于 Vditor.getHTML() 接口。
func (lute *Lute) VditorDOM2HTML(vhtml string) (sHTML string) {
markdown := lute.vditorDOM2Md(vhtml)
sHTML = lute.Md2HTML(markdown)
return
}
// Md2VditorDOM 将 markdown 转换为 Vditor DOM，用于从源码模式切换至所见即所得模式。
func (lute *Lute) Md2VditorDOM(markdown string) (vHTML string) {
tree := parse.Parse("", []byte(markdown), lute.ParseOptions)
renderer := render.NewVditorRenderer(tree, lute.RenderOptions)
for nodeType, rendererFunc := range lute.Md2VditorDOMRendererFuncs {
renderer.ExtRendererFuncs[nodeType] = rendererFunc
}
output := renderer.Render()
vHTML = string(output)
return
}
// VditorDOM2Md 将 Vditor DOM 转换为 markdown，用于从所见即所得模式切换至源码模式。
func (lute *Lute) VditorDOM2Md(htmlStr string) (markdown string) {
htmlStr = strings.ReplaceAll(htmlStr, editor.Zwsp, "")
markdown = lute.vditorDOM2Md(htmlStr)
markdown = strings.ReplaceAll(markdown, editor.Zwsp, "")
return
}
// RenderEChartsJSON 用于渲染 ECharts JSON 格式数据。
func (lute *Lute) RenderEChartsJSON(markdown string) (json string) {
tree := parse.Parse("", []byte(markdown), lute.ParseOptions)
renderer := render.NewEChartsJSONRenderer(tree, lute.RenderOptions)
output := renderer.Render()
json = string(output)
return
}
// RenderKityMinderJSON 用于渲染 KityMinder JSON 格式数据。
func (lute *Lute) RenderKityMinderJSON(markdown string) (json string) {
tree := parse.Parse("", []byte(markdown), lute.ParseOptions)
renderer := render.NewKityMinderJSONRenderer(tree, lute.RenderOptions)
output := renderer.Render()
json = string(output)
return
}
// HTML2Md 用于将 HTML 转换为 markdown。
func (lute *Lute) HTML2Md(html string) (markdown string) {
markdown, err := lute.HTML2Markdown(html)
if nil != err {
markdown = err.Error()
return
}
return
}
func (lute *Lute) vditorDOM2Md(htmlStr string) (markdown string) {
// 删掉插入符
htmlStr = strings.ReplaceAll(htmlStr, editor.FrontEndCaret, "")
// 替换结尾空白，否则 HTML 解析会产生冗余节点导致生成空的代码块
htmlStr = strings.ReplaceAll(htmlStr, "\t\n", "\n")
htmlStr = strings.ReplaceAll(htmlStr, " \n", " \n")
// 将字符串解析为 DOM 树
htmlRoot := lute.parseHTML(htmlStr)
if nil == htmlRoot {
return
}
// 调整 DOM 结构
lute.adjustVditorDOM(htmlRoot)
// 将 HTML 树转换为 Markdown AST
tree := &parse.Tree{Name: "", Root: &ast.Node{Type: ast.NodeDocument}, Context: &parse.Context{ParseOption: lute.ParseOptions}}
tree.Context.Tip = tree.Root
for c := htmlRoot.FirstChild; nil != c; c = c.NextSibling {
lute.genASTByVditorDOM(c, tree)
}
// 调整树结构
ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
if entering {
switch n.Type {
case ast.NodeInlineHTML, ast.NodeCodeSpan, ast.NodeInlineMath, ast.NodeHTMLBlock, ast.NodeCodeBlockCode, ast.NodeMathBlockContent:
n.Tokens = html.UnescapeHTML(n.Tokens)
if nil != n.Next && ast.NodeCodeSpan == n.Next.Type && n.CodeMarkerLen == n.Next.CodeMarkerLen {
// 合并代码节点 https://github.com/Vanessa219/vditor/issues/167
n.FirstChild.Next.Tokens = append(n.FirstChild.Next.Tokens, n.Next.FirstChild.Next.Tokens...)
n.Next.Unlink()
}
case ast.NodeList:
// 浏览器生成的子列表是 ul.ul 形式，需要将其调整为 ul.li.ul
if nil != n.Parent && ast.NodeList == n.Parent.Type {
if previousLi := n.Previous; nil != previousLi {
previousLi.AppendChild(n)
}
}
}
}
return ast.WalkContinue
})
// 将 AST 进行 Markdown 格式化渲染
options := render.NewOptions()
options.AutoSpace = false
options.FixTermTypo = false
renderer := render.NewFormatRenderer(tree, options)
formatted := renderer.Render()
markdown = string(formatted)
return
}
func (lute *Lute) parseHTML(htmlStr string) *html.Node {
reader := strings.NewReader(htmlStr)
doc, err := html.Parse(reader)
if nil != err {
return nil
}
if "html" != doc.FirstChild.Data {
return doc
}
return doc.FirstChild.LastChild // doc.html.body
}
func (lute *Lute) adjustVditorDOM(root *html.Node) {
lute.removeEmptyNodes(root)
lute.removeHighlightJSSpans(root)
for c := root.FirstChild; nil != c; c = c.NextSibling {
lute.mergeVditorDOMList0(c)
}
for c := root.FirstChild; nil != c; c = c.NextSibling {
lute.adjustVditorDOMListTight0(c)
}
for c := root.FirstChild; nil != c; c = c.NextSibling {
lute.adjustVditorDOMListList(c)
}
for c := root.FirstChild; nil != c; c = c.NextSibling {
lute.adjustVditorDOMListItemInP(c)
}
for c := root.FirstChild; nil != c; {
next := c.NextSibling
lute.removeCodeCode(c)
c = next
}
for c := root.FirstChild; nil != c; {
next := c.NextSibling
lute.adjustVditorDOMCodeA(c)
c = next
}
for c := root.FirstChild; nil != c; c = c.NextSibling {
lute.adjustCustomTag(c)
}
for c := root.FirstChild; nil != c; c = c.NextSibling {
lute.mergeSameStrong(c)
}
for c := root.FirstChild; nil != c; c = c.NextSibling {
lute.adjustTableCode(c)
}
for c := root.FirstChild; nil != c; c = c.NextSibling {
lute.adjustMath(c)
}
for c := root.FirstChild; nil != c; c = c.NextSibling {
lute.adjustNoscriptImg(c)
}
}
func (lute *Lute) adjustCustomTag(n *html.Node) {
// 将某些自定义标签转换为标准标签
if html.ElementNode == n.Type && 0 == n.DataAtom {
if "ucapcontent" == n.Data {
n.DataAtom = atom.Div
} else if "ucaptitle" == n.Data {
n.DataAtom = atom.H2
n.Data = "h2"
}
}
for c := n.FirstChild; nil != c; c = c.NextSibling {
lute.adjustCustomTag(c)
}
}
func (lute *Lute) adjustNoscriptImg(n *html.Node) {
if nil != n.Parent && atom.Figure == n.Parent.DataAtom &&
atom.Noscript == n.DataAtom && nil != n.FirstChild && strings.HasPrefix(n.FirstChild.Data, "<img ") {
img := n.FirstChild
img.Unlink()
img.DataAtom = atom.Img
fragment, err := html.ParseFragment(strings.NewReader(img.Data), &html.Node{Type: html.ElementNode})
if nil != err || 1 > len(fragment) {
return
}
img = fragment[0]
n.InsertBefore(img)
var unlinks []*html.Node
for c := n; nil != c; c = c.NextSibling {
if atom.Figcaption == c.DataAtom {
continue
}
unlinks = append(unlinks, c)
}
for _, unlink := range unlinks {
unlink.Unlink()
}
}
for c := n.FirstChild; nil != c; c = c.NextSibling {
lute.adjustNoscriptImg(c)
}
}
func (lute *Lute) adjustMath(n *html.Node) {
class := util.DomAttrValue(n, "class")
if ((atom.Span == n.DataAtom || atom.Div == n.DataAtom) && strings.Contains(class, "mwe-math-element")) || (strings.Contains(class, "tex") && !strings.Contains(class, "text")) {
if annos := util.DomChildrenByType(n, atom.Annotation); 0 < len(annos) {
anno := annos[0]
if "application/x-tex" == util.DomAttrValue(anno, "encoding") {
util.SetDomAttrValue(n, "data-tex", util.DomText(anno))
return
}
}
if imgs := util.DomChildrenByType(n, atom.Img); 0 < len(imgs) {
img := imgs[0]
if mathContent := util.DomAttrValue(img, "alt"); "" != mathContent {
util.SetDomAttrValue(n, "data-tex", mathContent)
return
}
}
}
formula := util.DomAttrValue(n, "data-formula")
if "" != formula {
if html.ElementNode == n.Type && "mjx-container" == n.Data {
n.DataAtom = atom.Span
}
util.SetDomAttrValue(n, "data-tex", formula)
return
}
if strings.Contains(class, "texhtml") {
if mathContent := util.DomTexhtml(n); "" != mathContent {
util.SetDomAttrValue(n, "data-tex", mathContent)
return
}
}
if strings.Contains(class, "math") {
scripts := util.DomChildrenByType(n, atom.Script)
if 0 < len(scripts) {
script := scripts[0]
if "math/tex" == util.DomAttrValue(script, "type") {
if mathContent := util.DomText(script); "" != mathContent {
util.SetDomAttrValue(n, "data-tex", mathContent)
}
}
}
}
for c := n.FirstChild; nil != c; c = c.NextSibling {
lute.adjustMath(c)
}
}
func (lute *Lute) adjustTableCode(n *html.Node) {
if atom.Table == n.DataAtom {
// 表格类型的代码块进行预处理 https://github.com/siyuan-note/siyuan/issues/11540
// 移除 <td class="gutter">
// td class="code"> 下的 <div class="container"> 改为 <pre>
tds := util.DomChildrenByType(n, atom.Td)
var unlinks []*html.Node
for _, td := range tds {
tdClass := util.DomAttrValue(td, "class")
if strings.Contains(tdClass, "gutter") {
unlinks = append(unlinks, td)
continue
}
if strings.Contains(tdClass, "code") {
if c := td.FirstChild; nil != c && atom.Div == c.DataAtom {
c.DataAtom = atom.Pre
c.Data = "pre"
lang := util.DomAttrValue(n, "class")
lang = strings.ReplaceAll(lang, "syntaxhighlighter", "")
lang = strings.TrimSpace(lang)
if "" != lang {
util.SetDomAttrValue(c, "class", lang)
}
for div := c.FirstChild; nil != div; div = div.NextSibling {
div.DataAtom = atom.Code
div.Data = "code"
}
}
}
}
for _, unlink := range unlinks {
unlink.Unlink()
}
}
for c := n.FirstChild; nil != c; c = c.NextSibling {
lute.adjustTableCode(c)
}
}
func (lute *Lute) mergeSameStrong(n *html.Node) {
for c := n.FirstChild; nil != c; {
next := c.NextSibling
if nil != next && atom.Strong == c.DataAtom && atom.Strong == next.DataAtom {
for cc := next.FirstChild; nil != cc; {
nextChild := cc.NextSibling
cc.Unlink()
c.AppendChild(cc)
cc = nextChild
}
next.Unlink()
next = c.NextSibling
}
c = next
}
for c := n.FirstChild; nil != c; c = c.NextSibling {
lute.mergeSameStrong(c)
}
}
// adjustVditorDOMListList 用于将 ul.ul 调整为 ul.li.ul。
func (lute *Lute) adjustVditorDOMListList(n *html.Node) {
if atom.Ul != n.DataAtom && atom.Ol != n.DataAtom && atom.Li != n.DataAtom {
return
}
if atom.Li == n.DataAtom {
if nil != n.FirstChild && atom.Br == n.FirstChild.DataAtom {
// 规范化换行时 li 的结构，对调 ZWSP 和 <br> 的位置
n.FirstChild.DataAtom = 0
n.FirstChild.Data = editor.Zwsp
if nextLi := n.NextSibling; nil != n.NextSibling && atom.Li == n.NextSibling.DataAtom {
if caret := nextLi.FirstChild; nil != caret && editor.Caret+editor.Zwsp == caret.Data {
caret.Data = editor.Caret + "\n"
}
}
}
} else {
if nil != n.Parent && (atom.Ul == n.Parent.DataAtom || atom.Ol == n.Parent.DataAtom) {
if prevLi := n.PrevSibling; nil != prevLi {
n.Unlink()
prevLi.AppendChild(n)
}
}
}
for c := n.FirstChild; c != nil; {
next := c.NextSibling
lute.adjustVditorDOMListList(c)
c = next
}
}
func (lute *Lute) removeHighlightJSSpans(node *html.Node) {
var spans []*html.Node
for c := node; nil != c; c = c.NextSibling {
lute.hljsSpans(c, &spans)
}
for _, span := range spans {
span.Unlink()
}
}
func (lute *Lute) hljsSpans(n *html.Node, spans *[]*html.Node) {
if atom.Span == n.DataAtom && strings.HasPrefix(util.DomAttrValue(n, "class"), "hljs-") {
*spans = append(*spans, n)
text := util.DomText(n)
n.InsertBefore(&html.Node{Type: html.TextNode, Data: text})
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
lute.hljsSpans(c, spans)
}
}
func (lute *Lute) removeEmptyNodes(node *html.Node) {
var emptyNodes []*html.Node
for c := node; nil != c; c = c.NextSibling {
lute.searchEmptyNodes(c, &emptyNodes)
}
for _, emptyNode := range emptyNodes {
emptyNode.Unlink()
}
}
func (lute *Lute) searchEmptyNodes(n *html.Node, emptyNodes *[]*html.Node) {
switch n.DataAtom {
case 0:
if lute.isInline(n.PrevSibling) || lute.isInline(n.NextSibling) || lute.isInline(n.Parent) {
// 前节点或者后节点是行级节点的话保留该空白
break
}
if html.TextNode == n.Type {
data := strings.TrimLeft(n.Data, " ")
data = strings.TrimRight(data, " ")
for strings.Contains(data, "\n\n") {
// 浏览器剪藏扩展列表下方段落缩进成为子块 https://github.com/siyuan-note/siyuan/issues/6289
data = strings.ReplaceAll(data, "\n\n", "")
}
if "" == data {
*emptyNodes = append(*emptyNodes, n)
return
}
}
parent := n.Parent
if nil != parent && (atom.Ol == parent.DataAtom || atom.Ul == parent.DataAtom || atom.Li == parent.DataAtom) {
if nil == n.NextSibling || (html.TextNode == n.NextSibling.Type || atom.Ul == n.NextSibling.DataAtom) || "" == strings.TrimSpace(n.Data) {
n.Data = strings.TrimRight(n.Data, "\n\t ")
}
}
if nil != parent && (atom.Table == parent.DataAtom || atom.Thead == parent.DataAtom || atom.Tbody == parent.DataAtom || atom.Tr == parent.DataAtom) {
n.Data = strings.TrimSpace(n.Data)
}
if "" == n.Data {
*emptyNodes = append(*emptyNodes, n)
}
if html.CommentNode == n.Type {
*emptyNodes = append(*emptyNodes, n)
}
case atom.Span:
if lc := n.LastChild; nil != lc && atom.Br == lc.DataAtom {
// 如果行级标记节点最后一个子节点是 <br>，则将该 <br> 移动到该行级标记节点的后面
// 表格内多个连续的超链接无法换行显示 https://github.com/siyuan-note/siyuan/issues/5966
n.InsertAfter(lc)
}
if util.IsTempMarkSpan(n) {
// 将嵌套在临时标记中的节点提升到临时标记节点之前
*emptyNodes = append(*emptyNodes, n)
var children []*html.Node
for c := n.FirstChild; c != nil; c = c.NextSibling {
children = append(children, c)
}
for _, c := range children {
n.InsertBefore(c)
}
return
}
case atom.Strong, atom.B, atom.Em, atom.I, atom.Del, atom.S, atom.Strike, atom.Mark:
if nil != n.FirstChild {
if atom.Br == n.FirstChild.DataAtom {
*emptyNodes = append(*emptyNodes, n.FirstChild)
n.InsertBefore(&html.Node{Type: html.ElementNode, DataAtom: atom.Br, Data: "br"})
}
if html.TextNode == n.FirstChild.Type {
text := n.FirstChild.Data
spaces := lute.prefixSpaces(text)
if "" != spaces {
n.FirstChild.Data = editor.Zwsp + n.FirstChild.Data
}
}
}
if nil != n.LastChild {
if atom.Br == n.LastChild.DataAtom {
*emptyNodes = append(*emptyNodes, n.LastChild)
n.InsertAfter(&html.Node{Type: html.ElementNode, DataAtom: atom.Br, Data: "br"})
}
if html.TextNode == n.LastChild.Type {
text := n.LastChild.Data
spaces := lute.suffixSpaces(text)
if "" != spaces {
n.FirstChild.Data = n.FirstChild.Data + editor.Zwsp
}
}
}
default:
if "katex" == util.DomAttrValue(n, "class") {
*emptyNodes = append(*emptyNodes, n)
}
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
lute.searchEmptyNodes(c, emptyNodes)
}
switch n.DataAtom {
case atom.Ol, atom.Ul:
if dataType := util.DomAttrValue(n, "data-type"); "footnotes-defs-ol" == dataType {
return
}
if nil != n.FirstChild && nil != n.FirstChild.FirstChild && atom.Input != n.FirstChild.FirstChild.DataAtom {
return
}
text := util.DomText(n)
if "" == text {
*emptyNodes = append(*emptyNodes, n)
}
}
}
func (lute *Lute) mergeVditorDOMList0(n *html.Node) {
switch n.DataAtom {
case atom.Ul, atom.Ol:
if nil != n.NextSibling && n.DataAtom == n.NextSibling.DataAtom && 1 == len(n.NextSibling.Attr) {
for c := n.NextSibling.FirstChild; nil != c; {
next := c.NextSibling
c.Unlink()
n.AppendChild(c)
c = next
}
n.NextSibling.Unlink()
}
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
lute.mergeVditorDOMList0(c)
}
}
func (lute *Lute) adjustVditorDOMListTight0(n *html.Node) {
switch n.DataAtom {
case atom.Ul:
if !lute.parentIs(n, atom.Pre) {
lute.setDOMAttrValue(n, "data-tight", lute.isTightList(n))
}
case atom.Ol:
if !lute.parentIs(n, atom.Pre) {
lute.setDOMAttrValue(n, "data-tight", lute.isTightList(n))
}
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
lute.adjustVditorDOMListTight0(c)
}
}
func (lute *Lute) adjustVditorDOMListItemInP(n *html.Node) {
switch n.DataAtom {
case atom.Li:
// li 换行时 id 重复需要重新生成
if nil != n.PrevSibling && util.DomAttrValue(n.PrevSibling, "data-node-id") == util.DomAttrValue(n, "data-node-id") {
lute.setDOMAttrValue(n, "data-node-id", ast.NewNodeID())
}
// 松散 li 换行时和上一个 li.last id 重复
if nil != n.PrevSibling && nil != n.FirstChild {
id := util.DomAttrValue(n.FirstChild, "data-node-id") // id 为空的话是行级节点，列表项行级排版自动换行问题 https://github.com/siyuan-note/siyuan/issues/379
if "" != id && nil != n.PrevSibling.LastChild && util.DomAttrValue(n.PrevSibling.LastChild, "data-node-id") == id {
lute.setDOMAttrValue(n.FirstChild, "data-node-id", ast.NewNodeID())
}
}
// 在 li 下的每个非容器块节点用 p 包裹
for c := n.FirstChild; nil != c; c = c.NextSibling {
if lute.listItemEnter(n) {
p := &html.Node{Type: html.ElementNode, Data: "p", DataAtom: atom.P}
p.AppendChild(&html.Node{Type: html.TextNode, Data: editor.Caret})
p.AppendChild(&html.Node{Type: html.ElementNode, Data: "br", DataAtom: atom.Br})
n.FirstChild.Unlink()
n.FirstChild.Unlink()
n.AppendChild(p)
c = p
continue
}
if atom.P != c.DataAtom && atom.Blockquote != c.DataAtom && atom.Ul != c.DataAtom && atom.Ol != c.DataAtom && atom.Div != c.DataAtom {
spans, nextBlock := lute.forwardNextBlock(c)
p := &html.Node{Type: html.ElementNode, Data: "p", DataAtom: atom.P}
c.InsertBefore(p)
for _, span := range spans {
span.Unlink()
p.AppendChild(span)
}
if c = nextBlock; nil == c {
break
}
}
}
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
lute.adjustVditorDOMListItemInP(c)
}
}
func (lute *Lute) removeCodeCode(n *html.Node) {
if atom.Code == n.DataAtom && nil != n.FirstChild && atom.Code == n.FirstChild.DataAtom {
// code.code 重复嵌套，则不处理外层 code
for c := n.FirstChild; nil != c; {
next := c.NextSibling
c.Unlink()
n.InsertBefore(c)
c = next
}
n.Unlink()
return
}
for c := n.FirstChild; c != nil; {
next := c.NextSibling
lute.removeCodeCode(c)
c = next
}
}
func (lute *Lute) adjustVditorDOMCodeA(n *html.Node) {
// https://github.com/siyuan-note/siyuan/issues/11370
if atom.Code == n.DataAtom && nil != n.FirstChild && atom.A == n.FirstChild.DataAtom && n.FirstChild == n.LastChild {
// code.a 的情况将 a 移到 code 外层，即 a.code
prev := n.PrevSibling
next := n.NextSibling
parent := n.Parent
a := n.FirstChild
a.Unlink()
n.Unlink()
var anchorTexts []*html.Node
for c := a.FirstChild; nil != c; c = c.NextSibling {
anchorTexts = append(anchorTexts, c)
c.Unlink()
}
for _, anchorText := range anchorTexts {
n.AppendChild(anchorText)
}
a.AppendChild(n)
if nil != prev {
prev.InsertAfter(a)
} else if nil != next {
next.InsertBefore(a)
} else if nil != parent {
parent.AppendChild(a)
}
return
}
for c := n.FirstChild; c != nil; {
next := c.NextSibling
lute.adjustVditorDOMCodeA(c)
c = next
}
}
// forwardNextBlock 向前移动至下一个块级节点，即跳过行级节点。
func (lute *Lute) forwardNextBlock(spanNode *html.Node) (spans []*html.Node, nextBlock *html.Node) {
for next := spanNode; nil != next; next = next.NextSibling {
switch next.DataAtom {
case atom.Ol, atom.Ul, atom.Div, atom.Blockquote:
return
}
spans = append(spans, next)
}
return
}
func (lute *Lute) listItemEnter(li *html.Node) bool {
if nil == li.FirstChild {
return false
}
if editor.Caret == li.FirstChild.Data && "br" == li.LastChild.Data {
return true
}
return false
}
func (lute *Lute) isTightList(list *html.Node) string {
for li := list.FirstChild; nil != li; li = li.NextSibling {
var subLists, subDivs, subBlockquotes, subParagraphs int
for c := li.FirstChild; nil != c; c = c.NextSibling {
switch c.DataAtom {
case atom.Ul, atom.Ol:
subLists++
case atom.Div:
subDivs++
case atom.Blockquote:
subBlockquotes++
case atom.P:
subParagraphs++
}
}
if 1 < subParagraphs || 1 < subBlockquotes || 1 < subDivs || 1 < subLists {
return "false"
}
if 1 < subParagraphs+subDivs || 1 < subParagraphs+subBlockquotes || 1 < subParagraphs+subLists {
return "false"
}
}
return "true"
}
// genASTByVditorDOM 根据指定的 Vditor DOM 节点 n 进行深度优先遍历并逐步生成 Markdown 语法树 tree。
func (lute *Lute) genASTByVditorDOM(n *html.Node, tree *parse.Tree) {
dataRender := util.DomAttrValue(n, "data-render")
if "1" == dataRender || "2" == dataRender { // 1：浮动工具栏，2：preview 代码块、数学公式块
return
}
dataType := util.DomAttrValue(n, "data-type")
if atom.Div == n.DataAtom {
if "code-block" == dataType || "html-block" == dataType || "math-block" == dataType || "yaml-front-matter" == dataType {
for c := n.FirstChild; c != nil; c = c.NextSibling {
lute.genASTByVditorDOM(c, tree)
}
} else if "link-ref-defs-block" == dataType {
text := util.DomText(n)
node := &ast.Node{Type: ast.NodeText, Tokens: []byte(text)}
tree.Context.Tip.AppendChild(node)
} else if "footnotes-block" == dataType {
ol := n.FirstChild
if atom.Ol != ol.DataAtom {
return
}
for li := ol.FirstChild; nil != li; li = li.NextSibling {
if "\n" == li.Data {
continue
}
originalHTML := &bytes.Buffer{}
if err := html.Render(originalHTML, li); nil == err {
md := lute.vditorDOM2Md("<ol data-type=\"footnotes-defs-ol\">" + originalHTML.String() + "</ol>")
label := util.DomAttrValue(li, "data-marker")
md = md[3:] // 去掉列表项标记符 1.
lines := strings.Split(md, "\n")
md = ""
for i, line := range lines {
if 0 < i {
md += " " + line
} else {
md = line
}
md += "\n"
}
md = "[" + label + "]: " + md
node := &ast.Node{Type: ast.NodeText, Tokens: []byte(md)}
tree.Context.Tip.AppendChild(node)
} else {
panic(err)
}
}
} else if "toc-block" == dataType {
node := &ast.Node{Type: ast.NodeToC}
tree.Context.Tip.AppendChild(node)
}
return
}
class := util.DomAttrValue(n, "class")
content := strings.ReplaceAll(n.Data, editor.Zwsp, "")
node := &ast.Node{Type: ast.NodeText, Tokens: []byte(content)}
switch n.DataAtom {
case 0:
if "" == content {
return
}
checkIndentCodeBlock := strings.ReplaceAll(content, editor.Caret, "")
checkIndentCodeBlock = strings.ReplaceAll(checkIndentCodeBlock, "\t", " ")
if (!lute.isInline(n.PrevSibling)) && strings.HasPrefix(checkIndentCodeBlock, " ") {
node.Type = ast.NodeCodeBlock
node.IsFencedCodeBlock = true
node.AppendChild(&ast.Node{Type: ast.NodeCodeBlockFenceOpenMarker, Tokens: []byte("```"), CodeBlockFenceLen: 3})
node.AppendChild(&ast.Node{Type: ast.NodeCodeBlockFenceInfoMarker})
startCaret := strings.HasPrefix(content, editor.Caret)
if startCaret {
content = strings.ReplaceAll(content, editor.Caret, "")
}
content = strings.TrimSpace(content)
if startCaret {
content = editor.Caret + content
}
content := &ast.Node{Type: ast.NodeCodeBlockCode, Tokens: []byte(content)}
node.AppendChild(content)
node.AppendChild(&ast.Node{Type: ast.NodeCodeBlockFenceCloseMarker, Tokens: []byte("```"), CodeBlockFenceLen: 3})
tree.Context.Tip.AppendChild(node)
return
}
if nil != n.Parent && atom.A == n.Parent.DataAtom {
node.Type = ast.NodeLinkText
}
tree.Context.Tip.AppendChild(node)
case atom.P, atom.Div:
node.Type = ast.NodeParagraph
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case atom.H1, atom.H2, atom.H3, atom.H4, atom.H5, atom.H6:
if "" == strings.TrimSpace(util.DomText(n)) {
return
}
node.Type = ast.NodeHeading
node.HeadingLevel = int(node.Tokens[1] - byte('0'))
marker := util.DomAttrValue(n, "data-marker")
if id := util.DomAttrValue(n, "data-id"); "" != id {
n.LastChild.InsertAfter(&html.Node{Type: html.TextNode, Data: " {" + id + "}"})
}
node.HeadingSetext = "=" == marker || "-" == marker
if !node.HeadingSetext {
headingC8hMarker := &ast.Node{Type: ast.NodeHeadingC8hMarker}
headingC8hMarker.Tokens = []byte(strings.Repeat("#", node.HeadingLevel))
node.AppendChild(headingC8hMarker)
}
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case atom.Hr:
node.Type = ast.NodeThematicBreak
tree.Context.Tip.AppendChild(node)
case atom.Blockquote:
content := strings.TrimSpace(util.DomText(n))
if "" == content || ">" == content || editor.Caret == content {
return
}
node.Type = ast.NodeBlockquote
node.AppendChild(&ast.Node{Type: ast.NodeBlockquoteMarker, Tokens: []byte(">")})
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case atom.Ol, atom.Ul:
if nil == n.FirstChild {
return
}
node.Type = ast.NodeList
node.ListData = &ast.ListData{}
if atom.Ol == n.DataAtom {
node.ListData.Typ = 1
}
tight := util.DomAttrValue(n, "data-tight")
if "true" == tight || "" == tight {
node.ListData.Tight = true
}
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case atom.Li:
node.Type = ast.NodeListItem
marker := util.DomAttrValue(n, "data-marker")
var bullet byte
if "" == marker {
if nil != n.Parent && atom.Ol == n.Parent.DataAtom {
firstLiMarker := util.DomAttrValue(n.Parent.FirstChild, "data-marker")
if startAttr := util.DomAttrValue(n.Parent, "start"); "" == startAttr {
marker = "1"
} else {
marker = startAttr
}
if "" != firstLiMarker {
marker += firstLiMarker[len(firstLiMarker)-1:]
} else {
marker += "."
}
} else {
marker = util.DomAttrValue(n.Parent, "data-marker")
if "" == marker {
marker = "*"
}
bullet = marker[0]
}
} else {
if nil != n.Parent {
if atom.Ol == n.Parent.DataAtom {
if "*" == marker || "-" == marker || "+" == marker {
marker = "1."
}
if "1." != marker && "1)" != marker && nil != n.PrevSibling && atom.Li != n.PrevSibling.DataAtom &&
nil != n.Parent.Parent && (atom.Ol == n.Parent.Parent.DataAtom || atom.Ul == n.Parent.Parent.DataAtom) {
// 子有序列表第一项必须从 1 开始
marker = "1."
}
if "1." != marker && "1)" != marker && atom.Ol == n.Parent.DataAtom && n.Parent.FirstChild == n && "" == util.DomAttrValue(n.Parent, "start") {
marker = "1."
}
} else {
if "*" != marker && "-" != marker && "+" != marker {
marker = "*"
}
bullet = marker[0]
}
} else {
marker = util.DomAttrValue(n, "data-marker")
if "" == marker {
marker = "*"
}
bullet = marker[0]
}
}
node.ListData = &ast.ListData{Marker: []byte(marker), BulletChar: bullet}
if 0 == bullet {
node.ListData.Num, _ = strconv.Atoi(string(marker[0]))
node.ListData.Delimiter = marker[len(marker)-1]
}
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case atom.Pre:
if atom.Code == n.FirstChild.DataAtom {
marker := util.DomAttrValue(n.Parent, "data-marker")
if "" == marker {
marker = "```"
}
var codeTokens []byte
if nil != n.FirstChild.FirstChild {
codeTokens = []byte(n.FirstChild.FirstChild.Data)
}
divDataType := util.DomAttrValue(n.Parent, "data-type")
switch divDataType {
case "math-block":
node.Type = ast.NodeMathBlock
node.AppendChild(&ast.Node{Type: ast.NodeMathBlockOpenMarker})
node.AppendChild(&ast.Node{Type: ast.NodeMathBlockContent, Tokens: codeTokens})
node.AppendChild(&ast.Node{Type: ast.NodeMathBlockCloseMarker})
tree.Context.Tip.AppendChild(node)
case "yaml-front-matter":
node.Type = ast.NodeYamlFrontMatter
node.AppendChild(&ast.Node{Type: ast.NodeYamlFrontMatterOpenMarker})
node.AppendChild(&ast.Node{Type: ast.NodeYamlFrontMatterContent, Tokens: codeTokens})
node.AppendChild(&ast.Node{Type: ast.NodeYamlFrontMatterCloseMarker})