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protyle.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://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"
"fmt"
"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/lex"
"github.com/88250/lute/parse"
"github.com/88250/lute/render"
"github.com/88250/lute/util"
)
func (lute *Lute) SpinBlockDOM(ivHTML string) (ovHTML string) {
//fmt.Println(ivHTML)
markdown := lute.blockDOM2Md(ivHTML)
markdown = strings.ReplaceAll(markdown, editor.Zwsp, "")
tree := parse.Parse("", []byte(markdown), lute.ParseOptions)
firstChild := tree.Root.FirstChild
lastChildMaybeIAL := tree.Root.LastChild.Previous
if ast.NodeParagraph == firstChild.Type && "" == firstChild.ID && nil != lastChildMaybeIAL && firstChild != lastChildMaybeIAL.Previous &&
ast.NodeKramdownBlockIAL == lastChildMaybeIAL.Type {
// 软换行后生成多个块，需要把老 ID 调整到第一个块上
firstChild.ID, lastChildMaybeIAL.Previous.ID = lastChildMaybeIAL.Previous.ID, ""
firstChild.KramdownIAL, lastChildMaybeIAL.Previous.KramdownIAL = lastChildMaybeIAL.Previous.KramdownIAL, nil
firstChild.InsertAfter(lastChildMaybeIAL)
}
if ast.NodeKramdownBlockIAL == firstChild.Type && nil != firstChild.Next && ast.NodeKramdownBlockIAL == firstChild.Next.Type && util.IsDocIAL(firstChild.Next.Tokens) {
// 空段落块还原
ialArray := parse.Tokens2IAL(firstChild.Tokens)
ial := parse.IAL2Map(ialArray)
p := &ast.Node{Type: ast.NodeParagraph, ID: ial["id"], KramdownIAL: ialArray}
firstChild.InsertBefore(p)
}
// 使用 Markdown 标记符嵌套行级元素后被还原为纯文本 https://github.com/siyuan-note/siyuan/issues/7637
// 这里需要将混合嵌套（比如 <strong><span a></span></strong>）的行级元素拆分为多个平铺的行级元素（<span strong> 和 <span strong a>）
parse.NestedInlines2FlattedSpansHybrid(tree, false)
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) HTML2BlockDOM(sHTML string) (vHTML string) {
//fmt.Println(sHTML)
markdown, err := lute.HTML2Markdown(sHTML)
if nil != err {
vHTML = err.Error()
return
}
tree := parse.Parse("", []byte(markdown), lute.ParseOptions)
renderer := render.NewProtyleRenderer(tree, lute.RenderOptions)
for nodeType, rendererFunc := range lute.HTML2BlockDOMRendererFuncs {
renderer.ExtRendererFuncs[nodeType] = rendererFunc
}
output := renderer.Render()
vHTML = util.BytesToStr(output)
return
}
func (lute *Lute) BlockDOM2HTML(vHTML string) (sHTML string) {
markdown := lute.blockDOM2Md(vHTML)
sHTML = lute.Md2HTML(markdown)
return
}
func (lute *Lute) BlockDOM2InlineBlockDOM(vHTML string) (vIHTML string) {
markdown := lute.blockDOM2Md(vHTML)
tree := parse.Parse("", []byte(markdown), lute.ParseOptions)
var inlines []*ast.Node
ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
if !entering {
return ast.WalkContinue
}
if ast.NodeTableCell == n.Type {
n.AppendChild(&ast.Node{Type: ast.NodeText, Tokens: []byte(" ")})
return ast.WalkContinue
}
if !n.IsBlock() && ast.NodeCodeBlockCode != n.Type && ast.NodeMathBlockContent != n.Type && ast.NodeTaskListItemMarker != n.Type &&
ast.NodeTableHead != n.Type && ast.NodeTableRow != n.Type && ast.NodeTableCell != n.Type {
inlines = append(inlines, n)
return ast.WalkSkipChildren
} else if ast.NodeHTMLBlock == n.Type {
inlines = append(inlines, &ast.Node{Type: ast.NodeText, Tokens: n.Tokens})
return ast.WalkSkipChildren
}
return ast.WalkContinue
})
var unlinks []*ast.Node
for n := tree.Root.FirstChild; nil != n; n = n.Next {
unlinks = append(unlinks, n)
}
for _, n := range unlinks {
n.Unlink()
}
for _, n := range inlines {
tree.Root.AppendChild(n)
}
renderer := render.NewProtyleRenderer(tree, lute.RenderOptions)
output := renderer.Render()
vIHTML = util.BytesToStr(output)
vIHTML = strings.TrimSpace(vIHTML)
return
}
func (lute *Lute) Md2BlockDOM(markdown string, reserveEmptyParagraph bool) (vHTML string) {
vHTML, _ = lute.Md2BlockDOMTree(markdown, reserveEmptyParagraph)
return
}
func (lute *Lute) Md2BlockDOMTree(markdown string, reserveEmptyParagraph bool) (vHTML string, tree *parse.Tree) {
tree = parse.Parse("", []byte(markdown), lute.ParseOptions)
parse.TextMarks2Inlines(tree) // 先将 TextMark 转换为 Inlines https://github.com/siyuan-note/siyuan/issues/13056
parse.NestedInlines2FlattedSpansHybrid(tree, false)
if reserveEmptyParagraph {
ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
if !entering {
return ast.WalkContinue
}
if n.IsEmptyBlockIAL() {
p := &ast.Node{Type: ast.NodeParagraph}
p.KramdownIAL = parse.Tokens2IAL(n.Tokens)
p.ID = p.IALAttr("id")
n.InsertBefore(p)
return ast.WalkContinue
}
return ast.WalkContinue
})
}
renderer := render.NewProtyleRenderer(tree, lute.RenderOptions)
for nodeType, rendererFunc := range lute.Md2BlockDOMRendererFuncs {
renderer.ExtRendererFuncs[nodeType] = rendererFunc
}
output := renderer.Render()
vHTML = util.BytesToStr(output)
return
}
func (lute *Lute) InlineMd2BlockDOM(markdown string) (vHTML string) {
tree := parse.Inline("", []byte(markdown), lute.ParseOptions)
parse.NestedInlines2FlattedSpansHybrid(tree, false)
renderer := render.NewProtyleRenderer(tree, lute.RenderOptions)
for nodeType, rendererFunc := range lute.Md2BlockDOMRendererFuncs {
renderer.ExtRendererFuncs[nodeType] = rendererFunc
}
output := renderer.Render()
vHTML = util.BytesToStr(output)
return
}
func (lute *Lute) BlockDOM2Md(htmlStr string) (kramdown string) {
kramdown = lute.blockDOM2Md(htmlStr)
kramdown = strings.ReplaceAll(kramdown, editor.Zwsp, "")
return
}
func (lute *Lute) BlockDOM2StdMd(htmlStr string) (markdown string) {
htmlStr = strings.ReplaceAll(htmlStr, editor.Zwsp, "")
// DOM 转 AST
tree := lute.BlockDOM2Tree(htmlStr)
// 将 kramdown IAL 节点内容置空
ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
if !entering {
return ast.WalkContinue
}
if ast.NodeKramdownBlockIAL == n.Type || ast.NodeKramdownSpanIAL == n.Type {
n.Tokens = nil
}
return ast.WalkContinue
})
options := render.NewOptions()
options.AutoSpace = false
options.FixTermTypo = false
options.KramdownBlockIAL = true
options.KramdownSpanIAL = true
options.KeepParagraphBeginningSpace = true
renderer := render.NewProtyleExportMdRenderer(tree, options)
formatted := renderer.Render()
markdown = util.BytesToStr(formatted)
return
}
func (lute *Lute) BlockDOM2Text(htmlStr string) (text string) {
tree := lute.BlockDOM2Tree(htmlStr)
return tree.Root.Text()
}
func (lute *Lute) BlockDOM2TextLen(htmlStr string) int {
tree := lute.BlockDOM2Tree(htmlStr)
return tree.Root.TextLen()
}
func (lute *Lute) BlockDOM2Content(htmlStr string) (text string) {
tree := lute.BlockDOM2Tree(htmlStr)
return tree.Root.Content()
}
func (lute *Lute) BlockDOM2EscapeMarkerContent(htmlStr string) (text string) {
tree := lute.BlockDOM2Tree(htmlStr)
return tree.Root.EscapeMarkerContent()
}
func (lute *Lute) Tree2BlockDOM(tree *parse.Tree, options *render.Options) (vHTML string) {
renderer := render.NewProtyleRenderer(tree, options)
for nodeType, rendererFunc := range lute.Md2BlockDOMRendererFuncs {
renderer.ExtRendererFuncs[nodeType] = rendererFunc
}
output := renderer.Render()
vHTML = util.BytesToStr(output)
vHTML = strings.ReplaceAll(vHTML, editor.Caret, "<wbr>")
return
}
func (lute *Lute) RenderNodeBlockDOM(node *ast.Node) string {
root := &ast.Node{Type: ast.NodeDocument}
tree := &parse.Tree{Root: root, Context: &parse.Context{ParseOption: lute.ParseOptions}}
renderer := render.NewProtyleRenderer(tree, lute.RenderOptions)
for nodeType, rendererFunc := range lute.Md2BlockDOMRendererFuncs {
renderer.ExtRendererFuncs[nodeType] = rendererFunc
}
renderer.Writer = &bytes.Buffer{}
ast.Walk(node, func(n *ast.Node, entering bool) ast.WalkStatus {
rendererFunc := renderer.RendererFuncs[n.Type]
return rendererFunc(n, entering)
})
return renderer.Writer.String()
}
func (lute *Lute) BlockDOM2Tree(htmlStr string) (ret *parse.Tree) {
htmlStr = strings.ReplaceAll(htmlStr, "\n<wbr>\n</strong>", "</strong>\n<wbr>\n")
htmlStr = strings.ReplaceAll(htmlStr, "\n<wbr>\n</em>", "</em>\n<wbr>\n")
htmlStr = strings.ReplaceAll(htmlStr, "\n<wbr>\n</s>", "</s>\n<wbr>\n")
htmlStr = strings.ReplaceAll(htmlStr, "\n<wbr>\n</u>", "</u>\n<wbr>\n")
htmlStr = strings.ReplaceAll(htmlStr, "\n<wbr>\n</span>", "</span>\n<wbr>\n")
// Improve `inline code` markdown editing https://github.com/siyuan-note/siyuan/issues/9978
// spinBlockDOMTests #212
htmlStr = strings.ReplaceAll(htmlStr, "`<wbr></span>", "</span>`<wbr>")
htmlStr = strings.ReplaceAll(htmlStr, "<wbr>", editor.Caret)
var startSpaces, endSpaces int
for _, c := range htmlStr {
if ' ' == c {
startSpaces++
} else {
break
}
}
for i := len(htmlStr) - 1; i >= 0; i-- {
if ' ' == htmlStr[i] {
endSpaces++
} else {
break
}
}
htmlStr = strings.TrimSpace(htmlStr)
htmlStr = strings.Repeat(" ", startSpaces) + htmlStr + strings.Repeat(" ", endSpaces)
// 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
ret = &parse.Tree{Name: "", Root: &ast.Node{Type: ast.NodeDocument}, Context: &parse.Context{ParseOption: lute.ParseOptions}}
ret.Context.Tip = ret.Root
for c := htmlRoot.FirstChild; nil != c; c = c.NextSibling {
lute.genASTByBlockDOM(c, ret)
}
// 调整树结构
ast.Walk(ret.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
if entering {
switch n.Type {
case ast.NodeInlineHTML, ast.NodeHTMLBlock, ast.NodeCodeSpanContent, ast.NodeCodeBlockCode, ast.NodeInlineMathContent, ast.NodeMathBlockContent,
ast.NodeCodeSpan, ast.NodeInlineMath:
if nil != n.Next && ast.NodeCodeSpan == n.Next.Type && n.CodeMarkerLen == n.Next.CodeMarkerLen && nil != n.FirstChild && nil != n.FirstChild.Next {
// 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.NodeStrong, ast.NodeEmphasis, ast.NodeStrikethrough, ast.NodeUnderline:
lute.MergeSameSpan(n)
case ast.NodeTextMark:
lute.MergeSameTextMark(n)
case ast.NodeText:
n.Tokens = bytes.ReplaceAll(n.Tokens, []byte("\u00a0"), []byte(" "))
}
}
return ast.WalkContinue
})
return
}
func (lute *Lute) MergeSameTextMark(n *ast.Node) {
if nil == n.Previous {
return
}
mergeWithIAL := false
mergeWithZwsp := false
if ast.NodeKramdownSpanIAL == n.Previous.Type {
if nil == n.Next || ast.NodeKramdownSpanIAL != n.Next.Type || nil == n.Previous.Previous {
return
}
if !bytes.Equal(n.Previous.Tokens, n.Next.Tokens) {
return
}
if !n.IsSameTextMarkType(n.Previous.Previous) {
return
}
mergeWithIAL = true
} else {
previewText := n.Previous.TokensStr()
if ast.NodeText == n.Previous.Type &&
!strings.Contains(previewText, " ") && !strings.Contains(previewText, " ") && !strings.Contains(previewText, "\n") && !strings.Contains(previewText, "\t") &&
"" == strings.TrimSpace(strings.ReplaceAll(strings.ReplaceAll(previewText, editor.Zwsp, ""), editor.Caret, "")) &&
nil != n.Previous.Previous && n.IsSameTextMarkType(n.Previous.Previous) {
mergeWithZwsp = true
} else {
if n.Type != n.Previous.Type || !n.IsSameTextMarkType(n.Previous) {
return
}
}
}
types := strings.Split(n.TextMarkType, " ")
m := map[string]bool{}
for _, t := range types {
m[t] = true
}
var allowMerge []string
for k, _ := range m {
switch k {
case "code", "em", "strong", "s", "mark", "u", "sub", "sup", "kbd", "text", "tag", "block-ref", "a":
allowMerge = append(allowMerge, k)
}
}
for _, k := range allowMerge {
delete(m, k)
}
if 0 < len(m) {
return
}
if mergeWithIAL || mergeWithZwsp {
content := n.TextMarkTextContent
n.TextMarkTextContent = n.Previous.Previous.TextMarkTextContent
if strings.Contains(n.Previous.TokensStr(), editor.Caret) {
n.TextMarkTextContent += editor.Caret
}
n.TextMarkTextContent += content
n.Previous.Previous.Unlink()
} else {
n.TextMarkTextContent = n.Previous.TextMarkTextContent + n.TextMarkTextContent
}
n.Previous.Unlink()
n.SortTextMarkDataTypes()
}
func (lute *Lute) MergeSameSpan(n *ast.Node) {
if nil == n.Next || n.Type != n.Next.Type {
return
}
if nil != n.Next.Next && ast.NodeKramdownSpanIAL == n.Next.Next.Type {
return
}
var spanChildren []*ast.Node
n.Next.FirstChild.Unlink() // open marker
n.Next.LastChild.Unlink() // close marker
for c := n.Next.FirstChild; nil != c; c = c.Next {
spanChildren = append(spanChildren, c)
}
for _, c := range spanChildren {
n.LastChild.InsertBefore(c)
}
n.Next.Unlink()
}
func (lute *Lute) CancelSuperBlock(ivHTML string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
if ast.NodeSuperBlock != tree.Root.FirstChild.Type {
return ivHTML
}
sb := tree.Root.FirstChild
var blocks []*ast.Node
for b := sb.FirstChild; nil != b; b = b.Next {
blocks = append(blocks, b)
}
for _, b := range blocks {
tree.Root.AppendChild(b)
}
sb.Unlink()
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) CancelList(ivHTML string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
if ast.NodeList != tree.Root.FirstChild.Type {
return ivHTML
}
list := tree.Root.FirstChild
var appends, unlinks []*ast.Node
for li := list.FirstChild; nil != li; li = li.Next {
for c := li.FirstChild; nil != c; c = c.Next {
if ast.NodeTaskListItemMarker != c.Type {
appends = append(appends, c)
}
}
unlinks = append(unlinks, li)
}
for _, c := range appends {
tree.Root.AppendChild(c)
}
for _, n := range unlinks {
n.Unlink()
}
list.Unlink()
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) CancelBlockquote(ivHTML string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
if ast.NodeBlockquote != tree.Root.FirstChild.Type {
return ivHTML
}
bq := tree.Root.FirstChild
var appends, unlinks []*ast.Node
for sub := bq.FirstChild; nil != sub; sub = sub.Next {
if ast.NodeBlockquoteMarker != sub.Type {
appends = append(appends, sub)
}
unlinks = append(unlinks, sub)
}
for _, c := range appends {
tree.Root.AppendChild(c)
}
bq.Unlink()
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) Blocks2Ps(ivHTML string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
node := tree.Root.FirstChild
var appends, unlinks []*ast.Node
for n := node; nil != n; n = n.Next {
switch n.Type {
case ast.NodeHeading:
n.Type = ast.NodeParagraph
case ast.NodeBlockquote:
for c := n.FirstChild; nil != c; c = c.Next {
if ast.NodeBlockquoteMarker == c.Type {
unlinks = append(unlinks, c)
continue
}
appends = append(appends, c)
}
unlinks = append(unlinks, n)
case ast.NodeList:
for li := n.FirstChild; nil != li; li = li.Next {
for c := li.FirstChild; nil != c; c = c.Next {
if ast.NodeTaskListItemMarker != c.Type {
appends = append(appends, c)
}
}
unlinks = append(unlinks, li)
}
unlinks = append(unlinks, n)
}
}
for _, n := range unlinks {
n.Unlink()
}
for _, c := range appends {
tree.Root.AppendChild(c)
}
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) Blocks2Hs(ivHTML, level string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
node := tree.Root.FirstChild
for p := node; nil != p; p = p.Next {
if ast.NodeParagraph == p.Type || ast.NodeHeading == p.Type {
p.Type = ast.NodeHeading
if nil != p.FirstChild {
p.FirstChild.Tokens = bytes.ReplaceAll(p.FirstChild.Tokens, []byte("\n"), nil)
p.FirstChild.Tokens = bytes.TrimLeft(p.FirstChild.Tokens, " \t\n")
}
p.HeadingLevel, _ = strconv.Atoi(level)
}
}
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) OL2TL(ivHTML string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
tree.Root.FirstChild.ListData.Typ = 3
for li := tree.Root.FirstChild.FirstChild; nil != li; li = li.Next {
if ast.NodeListItem == li.Type {
li.ListData.Typ = 3
li.PrependChild(&ast.Node{Type: ast.NodeTaskListItemMarker})
}
}
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) UL2TL(ivHTML string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
tree.Root.FirstChild.ListData.Typ = 3
for li := tree.Root.FirstChild.FirstChild; nil != li; li = li.Next {
if ast.NodeListItem == li.Type {
li.ListData.Typ = 3
li.PrependChild(&ast.Node{Type: ast.NodeTaskListItemMarker})
}
}
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) TL2OL(ivHTML string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
list := tree.Root.FirstChild
if ast.NodeList != list.Type || 3 != list.ListData.Typ {
return ivHTML
}
num := 1
list.ListData.Typ = 1
var unlinks []*ast.Node
for li := list.FirstChild; nil != li; li = li.Next {
if ast.NodeKramdownBlockIAL == li.Type {
continue
}
unlinks = append(unlinks, li.FirstChild) // task marker
li.ListData.Typ = 1
li.ListData.Num = num
num++
}
for _, n := range unlinks {
n.Unlink()
}
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) TL2UL(ivHTML string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
list := tree.Root.FirstChild
if ast.NodeList != list.Type || 3 != list.ListData.Typ {
return ivHTML
}
list.ListData.Typ = 0
var unlinks []*ast.Node
for li := list.FirstChild; nil != li; li = li.Next {
if ast.NodeKramdownBlockIAL == li.Type {
continue
}
unlinks = append(unlinks, li.FirstChild) // task marker
li.ListData.Typ = 0
}
for _, n := range unlinks {
n.Unlink()
}
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) OL2UL(ivHTML string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
list := tree.Root.FirstChild
if ast.NodeList != list.Type {
return ivHTML
}
list.ListData.Typ = 0
for li := list.FirstChild; nil != li; li = li.Next {
if ast.NodeKramdownBlockIAL == li.Type {
continue
}
li.ListData.Typ = 0
}
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) UL2OL(ivHTML string) (ovHTML string) {
tree := lute.BlockDOM2Tree(ivHTML)
list := tree.Root.FirstChild
if ast.NodeList != list.Type {
return ivHTML
}
num := 1
list.ListData.Typ = 1
for li := list.FirstChild; nil != li; li = li.Next {
if ast.NodeKramdownBlockIAL == li.Type {
continue
}
li.ListData.Typ = 1
li.ListData.Num = num
num++
}
ovHTML = lute.Tree2BlockDOM(tree, lute.RenderOptions)
return
}
func (lute *Lute) blockDOM2Md(htmlStr string) (markdown string) {
tree := lute.BlockDOM2Tree(htmlStr)
// 将 AST 进行 Markdown 格式化渲染
options := render.NewOptions()
options.AutoSpace = false
options.FixTermTypo = false
options.KramdownBlockIAL = true
options.KramdownSpanIAL = true
options.KeepParagraphBeginningSpace = true
options.ProtyleWYSIWYG = true
options.SuperBlock = true
renderer := render.NewFormatRenderer(tree, options)
formatted := renderer.Render()
markdown = string(formatted)
return
}
func (lute *Lute) genASTByBlockDOM(n *html.Node, tree *parse.Tree) {
class := util.DomAttrValue(n, "class")
// Custom dom, which will be omitted when build tree https://github.com/88250/lute/issues/206
if strings.Contains(class, "protyle-custom") {
return
}
if "protyle-attr" == class ||
strings.Contains(class, "__copy") ||
strings.Contains(class, "protyle-linenumber__rows") ||
strings.Contains(class, "hljs") {
return
}
if "1" == util.DomAttrValue(n, "spin") {
return
}
if strings.Contains(class, "protyle-action") {
if ast.NodeCodeBlock == tree.Context.Tip.Type {
languageNode := n.FirstChild
language := ""
if nil != languageNode.FirstChild {
language = languageNode.FirstChild.Data
}
tree.Context.Tip.AppendChild(&ast.Node{Type: ast.NodeCodeBlockFenceInfoMarker, CodeBlockInfo: util.StrToBytes(language)})
code := util.DomText(n.NextSibling.LastChild)
if strings.HasSuffix(code, "\n\n"+editor.Caret) {
code = strings.TrimSuffix(code, "\n\n"+editor.Caret)
code += "\n" + editor.Caret + "\n"
}
lines := strings.Split(code, "\n")
buf := bytes.Buffer{}
for i, line := range lines {
if strings.Contains(line, "```") {
line = strings.ReplaceAll(line, editor.Zwj+"```", "```")
line = strings.ReplaceAll(line, "```", editor.Zwj+"```")
}
buf.WriteString(line)
if i < len(lines)-1 {
buf.WriteByte('\n')
}
}
tree.Context.Tip.AppendChild(&ast.Node{Type: ast.NodeCodeBlockCode, Tokens: buf.Bytes()})
} else if ast.NodeListItem == tree.Context.Tip.Type {
if 3 == tree.Context.Tip.ListData.Typ { // 任务列表
tree.Context.Tip.AppendChild(&ast.Node{Type: ast.NodeTaskListItemMarker, TaskListItemChecked: strings.Contains(util.DomAttrValue(n.Parent, "class"), "protyle-task--done")})
}
}
return
}
if "true" == util.DomAttrValue(n, "contenteditable") {
lute.genASTContenteditable(n, tree)
return
}
dataType := ast.Str2NodeType(util.DomAttrValue(n, "data-type"))
nodeID := util.DomAttrValue(n, "data-node-id")
node := &ast.Node{ID: nodeID}
if "" != node.ID && !lute.parentIs(n, atom.Table) {
node.KramdownIAL = [][]string{{"id", node.ID}}
ialTokens := lute.setBlockIAL(n, node)
ial := &ast.Node{Type: ast.NodeKramdownBlockIAL, Tokens: ialTokens}
defer tree.Context.TipAppendChild(ial)
}
switch dataType {
case ast.NodeBlockQueryEmbed:
node.Type = ast.NodeBlockQueryEmbed
node.AppendChild(&ast.Node{Type: ast.NodeOpenBrace})
node.AppendChild(&ast.Node{Type: ast.NodeOpenBrace})
content := util.DomAttrValue(n, "data-content")
// 嵌入块中存在换行 SQL 语句时会被转换为段落文本 https://github.com/siyuan-note/siyuan/issues/5728
content = strings.ReplaceAll(content, "\n", editor.IALValEscNewLine)
node.AppendChild(&ast.Node{Type: ast.NodeBlockQueryEmbedScript, Tokens: util.StrToBytes(content)})
node.AppendChild(&ast.Node{Type: ast.NodeCloseBrace})
node.AppendChild(&ast.Node{Type: ast.NodeCloseBrace})
tree.Context.Tip.AppendChild(node)
return
case ast.NodeTable:
node.Type = ast.NodeTable
var tableAligns []int
if nil == n.FirstChild {
node.Type = ast.NodeParagraph
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
tree.Context.ParentTip()
return
}
if lute.parentIs(n, atom.Table) {
text := util.DomText(n)
node.Tokens = []byte(strings.TrimSpace(text))
tree.Context.Tip.AppendChild(node)
return
}
tableDiv := n.FirstChild
table := lute.domChild(tableDiv, atom.Table)
if nil == table {
node.Type = ast.NodeParagraph
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
tree.Context.ParentTip()
return
}
thead := lute.domChild(table, atom.Thead)
if nil == thead || nil == thead.FirstChild || nil == thead.FirstChild.FirstChild {
node.Type = ast.NodeParagraph
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
tree.Context.ParentTip()
return
}
for th := thead.FirstChild.FirstChild; nil != th; th = th.NextSibling {
align := util.DomAttrValue(th, "align")
switch align {
case "left":
tableAligns = append(tableAligns, 1)
case "center":
tableAligns = append(tableAligns, 2)
case "right":
tableAligns = append(tableAligns, 3)
default:
tableAligns = append(tableAligns, 0)
}
}
node.TableAligns = tableAligns
node.Tokens = nil
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
lute.genASTContenteditable(table, tree)
return
case ast.NodeParagraph:
node.Type = ast.NodeParagraph
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case ast.NodeHeading:
text := util.DomText(n)
if lute.parentIs(n, atom.Table) {
node.Tokens = []byte(strings.TrimSpace(text))
for bytes.HasPrefix(node.Tokens, []byte("#")) {
node.Tokens = bytes.TrimPrefix(node.Tokens, []byte("#"))
}
tree.Context.Tip.AppendChild(node)
return
}
level := util.DomAttrValue(n, "data-subtype")[1:]
tmp := strings.TrimPrefix(text, " ")
if strings.HasPrefix(tmp, "#") {
// Allow changing headings with `#` https://github.com/siyuan-note/siyuan/issues/7924
if idx := strings.Index(tmp, " "+editor.Caret); 0 < idx {
tmp = tmp[:idx]
if nil != n.FirstChild && nil != n.FirstChild.FirstChild {
headingContent := strings.TrimPrefix(strings.TrimPrefix(n.FirstChild.FirstChild.Data, tmp), " ")
n.FirstChild.FirstChild.Data = headingContent
}
level = fmt.Sprintf("%d", strings.Count(tmp, "#"))
}
}
node.Type = ast.NodeHeading
node.HeadingLevel, _ = strconv.Atoi(level)
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case ast.NodeBlockquote:
content := strings.TrimSpace(util.DomText(n))
if editor.Caret == content {
node.Type = ast.NodeText
node.Tokens = []byte(content)
tree.Context.Tip.AppendChild(node)
}
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 ast.NodeList:
node.Type = ast.NodeList
marker := util.DomAttrValue(n, "data-marker")
node.ListData = &ast.ListData{}
subType := util.DomAttrValue(n, "data-subtype")
if "u" == subType {
node.ListData.Typ = 0
} else if "o" == subType {
node.ListData.Typ = 1
} else if "t" == subType {
node.ListData.Typ = 3
}
node.ListData.Marker = []byte(marker)
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case ast.NodeListItem:
marker := util.DomAttrValue(n, "data-marker")
if ast.NodeList != tree.Context.Tip.Type {
parent := &ast.Node{}
parent.Type = ast.NodeList
parent.ListData = &ast.ListData{}
subType := util.DomAttrValue(n, "data-subtype")
if "u" == subType {
parent.ListData.Typ = 0
parent.ListData.BulletChar = '*'
} else if "o" == subType {
parent.ListData.Typ = 1
parent.ListData.Num, _ = strconv.Atoi(marker[:len(marker)-1])
parent.ListData.Delimiter = '.'
} else if "t" == subType {
parent.ListData.Typ = 3
parent.ListData.BulletChar = '*'
}
tree.Context.Tip.AppendChild(parent)
tree.Context.Tip = parent
}
node.Type = ast.NodeListItem
node.ListData = &ast.ListData{}
subType := util.DomAttrValue(n, "data-subtype")
if "u" == subType {
node.ListData.Typ = 0
node.ListData.BulletChar = '*'
} else if "o" == subType {
node.ListData.Typ = 1
node.ListData.Num, _ = strconv.Atoi(marker[:len(marker)-1])
node.ListData.Delimiter = '.'
} else if "t" == subType {
node.ListData.Typ = 3
node.ListData.BulletChar = '*'
}
node.ListData.Marker = []byte(marker)
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case ast.NodeGitConflict:
node.Type = ast.NodeGitConflict
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case ast.NodeSuperBlock:
node.Type = ast.NodeSuperBlock
tree.Context.Tip.AppendChild(node)
node.AppendChild(&ast.Node{Type: ast.NodeSuperBlockOpenMarker})
layout := util.DomAttrValue(n, "data-sb-layout")
node.AppendChild(&ast.Node{Type: ast.NodeSuperBlockLayoutMarker, Tokens: []byte(layout)})
tree.Context.Tip = node
defer tree.Context.ParentTip()
case ast.NodeMathBlock:
node.Type = ast.NodeMathBlock
node.AppendChild(&ast.Node{Type: ast.NodeMathBlockOpenMarker})
content := util.DomAttrValue(n, "data-content")
content = html.UnescapeHTMLStr(content)
node.AppendChild(&ast.Node{Type: ast.NodeMathBlockContent, Tokens: util.StrToBytes(content)})
node.AppendChild(&ast.Node{Type: ast.NodeMathBlockCloseMarker})
tree.Context.Tip.AppendChild(node)
return
case ast.NodeCodeBlock:
node.Type = ast.NodeCodeBlock
node.IsFencedCodeBlock = true
node.AppendChild(&ast.Node{Type: ast.NodeCodeBlockFenceOpenMarker, Tokens: util.StrToBytes("```")})
if language := util.DomAttrValue(n, "data-subtype"); "" != language {
node.AppendChild(&ast.Node{Type: ast.NodeCodeBlockFenceInfoMarker, CodeBlockInfo: util.StrToBytes(language)})
content := util.DomAttrValue(n, "data-content")
node.AppendChild(&ast.Node{Type: ast.NodeCodeBlockCode, Tokens: util.StrToBytes(content)})
node.AppendChild(&ast.Node{Type: ast.NodeCodeBlockFenceCloseMarker, Tokens: util.StrToBytes("```")})
tree.Context.Tip.AppendChild(node)
return
}
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case ast.NodeHTMLBlock:
node.Type = ast.NodeHTMLBlock
content := util.DomAttrValue(n.FirstChild.NextSibling.FirstChild, "data-content")
content = html.UnescapeHTMLStr(content)
node.Tokens = util.StrToBytes(content)
tree.Context.Tip.AppendChild(node)
return
case ast.NodeYamlFrontMatter:
node.Type = ast.NodeYamlFrontMatter
tree.Context.Tip.AppendChild(node)
tree.Context.Tip = node
defer tree.Context.ParentTip()
case ast.NodeThematicBreak:
node.Type = ast.NodeThematicBreak
tree.Context.Tip.AppendChild(node)
return
case ast.NodeIFrame:
node.Type = ast.NodeIFrame
n = lute.domChild(n.FirstChild, atom.Iframe)
node.Tokens = util.DomHTML(n)
tree.Context.Tip.AppendChild(node)
return
case ast.NodeWidget:
node.Type = ast.NodeWidget
n = lute.domChild(n.FirstChild, atom.Iframe)
node.Tokens = util.DomHTML(n)
tree.Context.Tip.AppendChild(node)
return
case ast.NodeVideo: