mirror of
https://github.com/go-gitea/gitea
synced 2024-12-23 05:44:50 +01:00
6130522aa8
Follow #29024 Major changes: * refactor validLinksPattern to fullURLPattern and add comments, now it accepts "protocol:" prefix * rename `IsLink*` to `IsFullURL*`, and remove unnecessray "mailto:" check * fix some comments (by the way) * rename EmojiShortCodeRegex -> emojiShortCodeRegex (by the way)
520 lines
15 KiB
Go
520 lines
15 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package markdown
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/modules/container"
|
|
"code.gitea.io/gitea/modules/markup"
|
|
"code.gitea.io/gitea/modules/markup/common"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
"code.gitea.io/gitea/modules/svg"
|
|
giteautil "code.gitea.io/gitea/modules/util"
|
|
|
|
"github.com/microcosm-cc/bluemonday/css"
|
|
"github.com/yuin/goldmark/ast"
|
|
east "github.com/yuin/goldmark/extension/ast"
|
|
"github.com/yuin/goldmark/parser"
|
|
"github.com/yuin/goldmark/renderer"
|
|
"github.com/yuin/goldmark/renderer/html"
|
|
"github.com/yuin/goldmark/text"
|
|
"github.com/yuin/goldmark/util"
|
|
)
|
|
|
|
// ASTTransformer is a default transformer of the goldmark tree.
|
|
type ASTTransformer struct{}
|
|
|
|
// Transform transforms the given AST tree.
|
|
func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc parser.Context) {
|
|
firstChild := node.FirstChild()
|
|
tocMode := ""
|
|
ctx := pc.Get(renderContextKey).(*markup.RenderContext)
|
|
rc := pc.Get(renderConfigKey).(*RenderConfig)
|
|
|
|
tocList := make([]markup.Header, 0, 20)
|
|
if rc.yamlNode != nil {
|
|
metaNode := rc.toMetaNode()
|
|
if metaNode != nil {
|
|
node.InsertBefore(node, firstChild, metaNode)
|
|
}
|
|
tocMode = rc.TOC
|
|
}
|
|
|
|
applyElementDir := func(n ast.Node) {
|
|
if markup.DefaultProcessorHelper.ElementDir != "" {
|
|
n.SetAttributeString("dir", []byte(markup.DefaultProcessorHelper.ElementDir))
|
|
}
|
|
}
|
|
|
|
_ = ast.Walk(node, func(n ast.Node, entering bool) (ast.WalkStatus, error) {
|
|
if !entering {
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
switch v := n.(type) {
|
|
case *ast.Heading:
|
|
for _, attr := range v.Attributes() {
|
|
if _, ok := attr.Value.([]byte); !ok {
|
|
v.SetAttribute(attr.Name, []byte(fmt.Sprintf("%v", attr.Value)))
|
|
}
|
|
}
|
|
txt := n.Text(reader.Source())
|
|
header := markup.Header{
|
|
Text: util.BytesToReadOnlyString(txt),
|
|
Level: v.Level,
|
|
}
|
|
if id, found := v.AttributeString("id"); found {
|
|
header.ID = util.BytesToReadOnlyString(id.([]byte))
|
|
}
|
|
tocList = append(tocList, header)
|
|
applyElementDir(v)
|
|
case *ast.Paragraph:
|
|
applyElementDir(v)
|
|
case *ast.Image:
|
|
// Images need two things:
|
|
//
|
|
// 1. Their src needs to munged to be a real value
|
|
// 2. If they're not wrapped with a link they need a link wrapper
|
|
|
|
// Check if the destination is a real link
|
|
if len(v.Destination) > 0 && !markup.IsFullURLBytes(v.Destination) {
|
|
v.Destination = []byte(giteautil.URLJoin(
|
|
ctx.Links.ResolveMediaLink(ctx.IsWiki),
|
|
strings.TrimLeft(string(v.Destination), "/"),
|
|
))
|
|
}
|
|
|
|
parent := n.Parent()
|
|
// Create a link around image only if parent is not already a link
|
|
if _, ok := parent.(*ast.Link); !ok && parent != nil {
|
|
next := n.NextSibling()
|
|
|
|
// Create a link wrapper
|
|
wrap := ast.NewLink()
|
|
wrap.Destination = v.Destination
|
|
wrap.Title = v.Title
|
|
wrap.SetAttributeString("target", []byte("_blank"))
|
|
|
|
// Duplicate the current image node
|
|
image := ast.NewImage(ast.NewLink())
|
|
image.Destination = v.Destination
|
|
image.Title = v.Title
|
|
for _, attr := range v.Attributes() {
|
|
image.SetAttribute(attr.Name, attr.Value)
|
|
}
|
|
for child := v.FirstChild(); child != nil; {
|
|
next := child.NextSibling()
|
|
image.AppendChild(image, child)
|
|
child = next
|
|
}
|
|
|
|
// Append our duplicate image to the wrapper link
|
|
wrap.AppendChild(wrap, image)
|
|
|
|
// Wire in the next sibling
|
|
wrap.SetNextSibling(next)
|
|
|
|
// Replace the current node with the wrapper link
|
|
parent.ReplaceChild(parent, n, wrap)
|
|
|
|
// But most importantly ensure the next sibling is still on the old image too
|
|
v.SetNextSibling(next)
|
|
}
|
|
case *ast.Link:
|
|
// Links need their href to munged to be a real value
|
|
link := v.Destination
|
|
isAnchorFragment := len(link) > 0 && link[0] == '#'
|
|
if !isAnchorFragment && !markup.IsFullURLBytes(link) {
|
|
base := ctx.Links.Base
|
|
if ctx.IsWiki {
|
|
base = ctx.Links.WikiLink()
|
|
} else if ctx.Links.HasBranchInfo() {
|
|
base = ctx.Links.SrcLink()
|
|
}
|
|
link = []byte(giteautil.URLJoin(base, string(link)))
|
|
}
|
|
if isAnchorFragment {
|
|
link = []byte("#user-content-" + string(link)[1:])
|
|
}
|
|
v.Destination = link
|
|
case *ast.List:
|
|
if v.HasChildren() {
|
|
children := make([]ast.Node, 0, v.ChildCount())
|
|
child := v.FirstChild()
|
|
for child != nil {
|
|
children = append(children, child)
|
|
child = child.NextSibling()
|
|
}
|
|
v.RemoveChildren(v)
|
|
|
|
for _, child := range children {
|
|
listItem := child.(*ast.ListItem)
|
|
if !child.HasChildren() || !child.FirstChild().HasChildren() {
|
|
v.AppendChild(v, child)
|
|
continue
|
|
}
|
|
taskCheckBox, ok := child.FirstChild().FirstChild().(*east.TaskCheckBox)
|
|
if !ok {
|
|
v.AppendChild(v, child)
|
|
continue
|
|
}
|
|
newChild := NewTaskCheckBoxListItem(listItem)
|
|
newChild.IsChecked = taskCheckBox.IsChecked
|
|
newChild.SetAttributeString("class", []byte("task-list-item"))
|
|
segments := newChild.FirstChild().Lines()
|
|
if segments.Len() > 0 {
|
|
segment := segments.At(0)
|
|
newChild.SourcePosition = rc.metaLength + segment.Start
|
|
}
|
|
v.AppendChild(v, newChild)
|
|
}
|
|
}
|
|
applyElementDir(v)
|
|
case *ast.Text:
|
|
if v.SoftLineBreak() && !v.HardLineBreak() {
|
|
if ctx.Metas["mode"] != "document" {
|
|
v.SetHardLineBreak(setting.Markdown.EnableHardLineBreakInComments)
|
|
} else {
|
|
v.SetHardLineBreak(setting.Markdown.EnableHardLineBreakInDocuments)
|
|
}
|
|
}
|
|
case *ast.CodeSpan:
|
|
colorContent := n.Text(reader.Source())
|
|
if css.ColorHandler(strings.ToLower(string(colorContent))) {
|
|
v.AppendChild(v, NewColorPreview(colorContent))
|
|
}
|
|
case *ast.Blockquote:
|
|
// We only want attention blockquotes when the AST looks like:
|
|
// Text: "["
|
|
// Text: "!TYPE"
|
|
// Text(SoftLineBreak): "]"
|
|
|
|
// grab these nodes and make sure we adhere to the attention blockquote structure
|
|
firstParagraph := v.FirstChild()
|
|
if firstParagraph.ChildCount() < 3 {
|
|
return ast.WalkContinue, nil
|
|
}
|
|
firstTextNode, ok := firstParagraph.FirstChild().(*ast.Text)
|
|
if !ok || string(firstTextNode.Segment.Value(reader.Source())) != "[" {
|
|
return ast.WalkContinue, nil
|
|
}
|
|
secondTextNode, ok := firstTextNode.NextSibling().(*ast.Text)
|
|
if !ok || !attentionTypeRE.MatchString(string(secondTextNode.Segment.Value(reader.Source()))) {
|
|
return ast.WalkContinue, nil
|
|
}
|
|
thirdTextNode, ok := secondTextNode.NextSibling().(*ast.Text)
|
|
if !ok || string(thirdTextNode.Segment.Value(reader.Source())) != "]" {
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
// grab attention type from markdown source
|
|
attentionType := strings.ToLower(strings.TrimPrefix(string(secondTextNode.Segment.Value(reader.Source())), "!"))
|
|
|
|
// color the blockquote
|
|
v.SetAttributeString("class", []byte("gt-py-3 attention attention-"+attentionType))
|
|
|
|
// create an emphasis to make it bold
|
|
emphasis := ast.NewEmphasis(2)
|
|
emphasis.SetAttributeString("class", []byte("attention-"+attentionType))
|
|
firstParagraph.InsertBefore(firstParagraph, firstTextNode, emphasis)
|
|
|
|
// capitalize first letter
|
|
attentionText := ast.NewString([]byte(strings.ToUpper(string(attentionType[0])) + attentionType[1:]))
|
|
|
|
// replace the ![TYPE] with icon+Type
|
|
emphasis.AppendChild(emphasis, attentionText)
|
|
for i := 0; i < 2; i++ {
|
|
lineBreak := ast.NewText()
|
|
lineBreak.SetSoftLineBreak(true)
|
|
firstParagraph.InsertAfter(firstParagraph, emphasis, lineBreak)
|
|
}
|
|
firstParagraph.InsertBefore(firstParagraph, emphasis, NewAttention(attentionType))
|
|
firstParagraph.RemoveChild(firstParagraph, firstTextNode)
|
|
firstParagraph.RemoveChild(firstParagraph, secondTextNode)
|
|
firstParagraph.RemoveChild(firstParagraph, thirdTextNode)
|
|
}
|
|
return ast.WalkContinue, nil
|
|
})
|
|
|
|
showTocInMain := tocMode == "true" /* old behavior, in main view */ || tocMode == "main"
|
|
showTocInSidebar := !showTocInMain && tocMode != "false" // not hidden, not main, then show it in sidebar
|
|
if len(tocList) > 0 && (showTocInMain || showTocInSidebar) {
|
|
if showTocInMain {
|
|
tocNode := createTOCNode(tocList, rc.Lang, nil)
|
|
node.InsertBefore(node, firstChild, tocNode)
|
|
} else {
|
|
tocNode := createTOCNode(tocList, rc.Lang, map[string]string{"open": "open"})
|
|
ctx.SidebarTocNode = tocNode
|
|
}
|
|
}
|
|
|
|
if len(rc.Lang) > 0 {
|
|
node.SetAttributeString("lang", []byte(rc.Lang))
|
|
}
|
|
}
|
|
|
|
type prefixedIDs struct {
|
|
values container.Set[string]
|
|
}
|
|
|
|
// Generate generates a new element id.
|
|
func (p *prefixedIDs) Generate(value []byte, kind ast.NodeKind) []byte {
|
|
dft := []byte("id")
|
|
if kind == ast.KindHeading {
|
|
dft = []byte("heading")
|
|
}
|
|
return p.GenerateWithDefault(value, dft)
|
|
}
|
|
|
|
// Generate generates a new element id.
|
|
func (p *prefixedIDs) GenerateWithDefault(value, dft []byte) []byte {
|
|
result := common.CleanValue(value)
|
|
if len(result) == 0 {
|
|
result = dft
|
|
}
|
|
if !bytes.HasPrefix(result, []byte("user-content-")) {
|
|
result = append([]byte("user-content-"), result...)
|
|
}
|
|
if p.values.Add(util.BytesToReadOnlyString(result)) {
|
|
return result
|
|
}
|
|
for i := 1; ; i++ {
|
|
newResult := fmt.Sprintf("%s-%d", result, i)
|
|
if p.values.Add(newResult) {
|
|
return []byte(newResult)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Put puts a given element id to the used ids table.
|
|
func (p *prefixedIDs) Put(value []byte) {
|
|
p.values.Add(util.BytesToReadOnlyString(value))
|
|
}
|
|
|
|
func newPrefixedIDs() *prefixedIDs {
|
|
return &prefixedIDs{
|
|
values: make(container.Set[string]),
|
|
}
|
|
}
|
|
|
|
// NewHTMLRenderer creates a HTMLRenderer to render
|
|
// in the gitea form.
|
|
func NewHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
|
|
r := &HTMLRenderer{
|
|
Config: html.NewConfig(),
|
|
}
|
|
for _, opt := range opts {
|
|
opt.SetHTMLOption(&r.Config)
|
|
}
|
|
return r
|
|
}
|
|
|
|
// HTMLRenderer is a renderer.NodeRenderer implementation that
|
|
// renders gitea specific features.
|
|
type HTMLRenderer struct {
|
|
html.Config
|
|
}
|
|
|
|
// RegisterFuncs implements renderer.NodeRenderer.RegisterFuncs.
|
|
func (r *HTMLRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
|
|
reg.Register(ast.KindDocument, r.renderDocument)
|
|
reg.Register(KindDetails, r.renderDetails)
|
|
reg.Register(KindSummary, r.renderSummary)
|
|
reg.Register(KindIcon, r.renderIcon)
|
|
reg.Register(ast.KindCodeSpan, r.renderCodeSpan)
|
|
reg.Register(KindAttention, r.renderAttention)
|
|
reg.Register(KindTaskCheckBoxListItem, r.renderTaskCheckBoxListItem)
|
|
reg.Register(east.KindTaskCheckBox, r.renderTaskCheckBox)
|
|
}
|
|
|
|
// renderCodeSpan renders CodeSpan elements (like goldmark upstream does) but also renders ColorPreview elements.
|
|
// See #21474 for reference
|
|
func (r *HTMLRenderer) renderCodeSpan(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
|
|
if entering {
|
|
if n.Attributes() != nil {
|
|
_, _ = w.WriteString("<code")
|
|
html.RenderAttributes(w, n, html.CodeAttributeFilter)
|
|
_ = w.WriteByte('>')
|
|
} else {
|
|
_, _ = w.WriteString("<code>")
|
|
}
|
|
for c := n.FirstChild(); c != nil; c = c.NextSibling() {
|
|
switch v := c.(type) {
|
|
case *ast.Text:
|
|
segment := v.Segment
|
|
value := segment.Value(source)
|
|
if bytes.HasSuffix(value, []byte("\n")) {
|
|
r.Writer.RawWrite(w, value[:len(value)-1])
|
|
r.Writer.RawWrite(w, []byte(" "))
|
|
} else {
|
|
r.Writer.RawWrite(w, value)
|
|
}
|
|
case *ColorPreview:
|
|
_, _ = w.WriteString(fmt.Sprintf(`<span class="color-preview" style="background-color: %v"></span>`, string(v.Color)))
|
|
}
|
|
}
|
|
return ast.WalkSkipChildren, nil
|
|
}
|
|
_, _ = w.WriteString("</code>")
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
// renderAttention renders a quote marked with i.e. "> **Note**" or "> **Warning**" with a corresponding svg
|
|
func (r *HTMLRenderer) renderAttention(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
|
|
if entering {
|
|
_, _ = w.WriteString(`<span class="gt-mr-2 gt-vm attention-`)
|
|
n := node.(*Attention)
|
|
_, _ = w.WriteString(strings.ToLower(n.AttentionType))
|
|
_, _ = w.WriteString(`">`)
|
|
|
|
var octiconType string
|
|
switch n.AttentionType {
|
|
case "note":
|
|
octiconType = "info"
|
|
case "tip":
|
|
octiconType = "light-bulb"
|
|
case "important":
|
|
octiconType = "report"
|
|
case "warning":
|
|
octiconType = "alert"
|
|
case "caution":
|
|
octiconType = "stop"
|
|
}
|
|
_, _ = w.WriteString(string(svg.RenderHTML("octicon-" + octiconType)))
|
|
} else {
|
|
_, _ = w.WriteString("</span>\n")
|
|
}
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
func (r *HTMLRenderer) renderDocument(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
|
|
n := node.(*ast.Document)
|
|
|
|
if val, has := n.AttributeString("lang"); has {
|
|
var err error
|
|
if entering {
|
|
_, err = w.WriteString("<div")
|
|
if err == nil {
|
|
_, err = w.WriteString(fmt.Sprintf(` lang=%q`, val))
|
|
}
|
|
if err == nil {
|
|
_, err = w.WriteRune('>')
|
|
}
|
|
} else {
|
|
_, err = w.WriteString("</div>")
|
|
}
|
|
|
|
if err != nil {
|
|
return ast.WalkStop, err
|
|
}
|
|
}
|
|
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
func (r *HTMLRenderer) renderDetails(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
|
|
var err error
|
|
if entering {
|
|
if _, err = w.WriteString("<details"); err != nil {
|
|
return ast.WalkStop, err
|
|
}
|
|
html.RenderAttributes(w, node, nil)
|
|
_, err = w.WriteString(">")
|
|
} else {
|
|
_, err = w.WriteString("</details>")
|
|
}
|
|
|
|
if err != nil {
|
|
return ast.WalkStop, err
|
|
}
|
|
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
func (r *HTMLRenderer) renderSummary(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
|
|
var err error
|
|
if entering {
|
|
_, err = w.WriteString("<summary>")
|
|
} else {
|
|
_, err = w.WriteString("</summary>")
|
|
}
|
|
|
|
if err != nil {
|
|
return ast.WalkStop, err
|
|
}
|
|
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
var (
|
|
validNameRE = regexp.MustCompile("^[a-z ]+$")
|
|
attentionTypeRE = regexp.MustCompile("^!(NOTE|TIP|IMPORTANT|WARNING|CAUTION)$")
|
|
)
|
|
|
|
func (r *HTMLRenderer) renderIcon(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
|
|
if !entering {
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
n := node.(*Icon)
|
|
|
|
name := strings.TrimSpace(strings.ToLower(string(n.Name)))
|
|
|
|
if len(name) == 0 {
|
|
// skip this
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
if !validNameRE.MatchString(name) {
|
|
// skip this
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
var err error
|
|
_, err = w.WriteString(fmt.Sprintf(`<i class="icon %s"></i>`, name))
|
|
if err != nil {
|
|
return ast.WalkStop, err
|
|
}
|
|
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
func (r *HTMLRenderer) renderTaskCheckBoxListItem(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
|
|
n := node.(*TaskCheckBoxListItem)
|
|
if entering {
|
|
if n.Attributes() != nil {
|
|
_, _ = w.WriteString("<li")
|
|
html.RenderAttributes(w, n, html.ListItemAttributeFilter)
|
|
_ = w.WriteByte('>')
|
|
} else {
|
|
_, _ = w.WriteString("<li>")
|
|
}
|
|
fmt.Fprintf(w, `<input type="checkbox" disabled="" data-source-position="%d"`, n.SourcePosition)
|
|
if n.IsChecked {
|
|
_, _ = w.WriteString(` checked=""`)
|
|
}
|
|
if r.XHTML {
|
|
_, _ = w.WriteString(` />`)
|
|
} else {
|
|
_ = w.WriteByte('>')
|
|
}
|
|
fc := n.FirstChild()
|
|
if fc != nil {
|
|
if _, ok := fc.(*ast.TextBlock); !ok {
|
|
_ = w.WriteByte('\n')
|
|
}
|
|
}
|
|
} else {
|
|
_, _ = w.WriteString("</li>\n")
|
|
}
|
|
return ast.WalkContinue, nil
|
|
}
|
|
|
|
func (r *HTMLRenderer) renderTaskCheckBox(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
|
|
return ast.WalkContinue, nil
|
|
}
|