mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-29 02:44:08 -05:00
415 lines
11 KiB
Go
415 lines
11 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package markdown
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/modules/markup"
|
|
"code.gitea.io/gitea/modules/markup/common"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
giteautil "code.gitea.io/gitea/modules/util"
|
|
|
|
meta "github.com/yuin/goldmark-meta"
|
|
"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"
|
|
)
|
|
|
|
var byteMailto = []byte("mailto:")
|
|
|
|
// Header holds the data about a header.
|
|
type Header struct {
|
|
Level int
|
|
Text string
|
|
ID string
|
|
}
|
|
|
|
// 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) {
|
|
metaData := meta.GetItems(pc)
|
|
firstChild := node.FirstChild()
|
|
createTOC := false
|
|
var toc = []Header{}
|
|
rc := &RenderConfig{
|
|
Meta: "table",
|
|
Icon: "table",
|
|
Lang: "",
|
|
}
|
|
if metaData != nil {
|
|
rc.ToRenderConfig(metaData)
|
|
|
|
metaNode := rc.toMetaNode(metaData)
|
|
if metaNode != nil {
|
|
node.InsertBefore(node, firstChild, metaNode)
|
|
}
|
|
createTOC = rc.TOC
|
|
toc = make([]Header, 0, 100)
|
|
}
|
|
|
|
_ = 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:
|
|
if createTOC {
|
|
text := n.Text(reader.Source())
|
|
header := Header{
|
|
Text: util.BytesToReadOnlyString(text),
|
|
Level: v.Level,
|
|
}
|
|
if id, found := v.AttributeString("id"); found {
|
|
header.ID = util.BytesToReadOnlyString(id.([]byte))
|
|
}
|
|
toc = append(toc, header)
|
|
} else {
|
|
for _, attr := range v.Attributes() {
|
|
if _, ok := attr.Value.([]byte); !ok {
|
|
v.SetAttribute(attr.Name, []byte(fmt.Sprintf("%v", attr.Value)))
|
|
}
|
|
}
|
|
}
|
|
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
|
|
link := v.Destination
|
|
if len(link) > 0 && !markup.IsLink(link) {
|
|
prefix := pc.Get(urlPrefixKey).(string)
|
|
if pc.Get(isWikiKey).(bool) {
|
|
prefix = giteautil.URLJoin(prefix, "wiki", "raw")
|
|
}
|
|
prefix = strings.Replace(prefix, "/src/", "/media/", 1)
|
|
|
|
lnk := strings.TrimLeft(string(link), "/")
|
|
|
|
lnk = giteautil.URLJoin(prefix, lnk)
|
|
link = []byte(lnk)
|
|
}
|
|
v.Destination = link
|
|
|
|
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 = link
|
|
wrap.Title = v.Title
|
|
|
|
// Duplicate the current image node
|
|
image := ast.NewImage(ast.NewLink())
|
|
image.Destination = link
|
|
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
|
|
if len(link) > 0 && !markup.IsLink(link) &&
|
|
link[0] != '#' && !bytes.HasPrefix(link, byteMailto) {
|
|
// special case: this is not a link, a hash link or a mailto:, so it's a
|
|
// relative URL
|
|
lnk := string(link)
|
|
if pc.Get(isWikiKey).(bool) {
|
|
lnk = giteautil.URLJoin("wiki", lnk)
|
|
}
|
|
link = []byte(giteautil.URLJoin(pc.Get(urlPrefixKey).(string), lnk))
|
|
}
|
|
if len(link) > 0 && link[0] == '#' {
|
|
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"))
|
|
v.AppendChild(v, newChild)
|
|
}
|
|
}
|
|
case *ast.Text:
|
|
if v.SoftLineBreak() && !v.HardLineBreak() {
|
|
renderMetas := pc.Get(renderMetasKey).(map[string]string)
|
|
mode := renderMetas["mode"]
|
|
if mode != "document" {
|
|
v.SetHardLineBreak(setting.Markdown.EnableHardLineBreakInComments)
|
|
} else {
|
|
v.SetHardLineBreak(setting.Markdown.EnableHardLineBreakInDocuments)
|
|
}
|
|
}
|
|
}
|
|
return ast.WalkContinue, nil
|
|
})
|
|
|
|
if createTOC && len(toc) > 0 {
|
|
lang := rc.Lang
|
|
if len(lang) == 0 {
|
|
lang = setting.Langs[0]
|
|
}
|
|
tocNode := createTOCNode(toc, lang)
|
|
if tocNode != nil {
|
|
node.InsertBefore(node, firstChild, tocNode)
|
|
}
|
|
}
|
|
|
|
if len(rc.Lang) > 0 {
|
|
node.SetAttributeString("lang", []byte(rc.Lang))
|
|
}
|
|
}
|
|
|
|
type prefixedIDs struct {
|
|
values map[string]bool
|
|
}
|
|
|
|
// 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 []byte, 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 _, ok := p.values[util.BytesToReadOnlyString(result)]; !ok {
|
|
p.values[util.BytesToReadOnlyString(result)] = true
|
|
return result
|
|
}
|
|
for i := 1; ; i++ {
|
|
newResult := fmt.Sprintf("%s-%d", result, i)
|
|
if _, ok := p.values[newResult]; !ok {
|
|
p.values[newResult] = true
|
|
return []byte(newResult)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Put puts a given element id to the used ids table.
|
|
func (p *prefixedIDs) Put(value []byte) {
|
|
p.values[util.BytesToReadOnlyString(value)] = true
|
|
}
|
|
|
|
func newPrefixedIDs() *prefixedIDs {
|
|
return &prefixedIDs{
|
|
values: map[string]bool{},
|
|
}
|
|
}
|
|
|
|
// 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(KindTaskCheckBoxListItem, r.renderTaskCheckBoxListItem)
|
|
reg.Register(east.KindTaskCheckBox, r.renderTaskCheckBox)
|
|
}
|
|
|
|
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 {
|
|
_, err = w.WriteString("<details>")
|
|
} 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 ]+$")
|
|
|
|
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>")
|
|
}
|
|
_, _ = w.WriteString(`<input type="checkbox" disabled=""`)
|
|
segments := node.FirstChild().Lines()
|
|
if segments.Len() > 0 {
|
|
segment := segments.At(0)
|
|
_, _ = w.WriteString(fmt.Sprintf(` data-source-position="%d"`, segment.Start))
|
|
}
|
|
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
|
|
}
|