mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-08-27 23:17:54 +02:00
Support RTL content in Markdown: ![image](https://github.com/go-gitea/gitea/assets/115237/dedb1b0c-2f05-40dc-931a-0d9dc81f7c97) Example document: https://try.gitea.io/silverwind/symlink-test/src/branch/master/bidi-text.md Same on GitHub: https://github.com/silverwind/symlink-test/blob/master/bidi-text.md `dir=auto` enables a browser heuristic that sets the text direction automatically. It is the only way to get automatic text direction. Ref: https://codeberg.org/Codeberg/Community/issues/1021 --------- Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
1280 lines
36 KiB
Go
1280 lines
36 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
|
||
// SPDX-License-Identifier: MIT
|
||
|
||
package markup
|
||
|
||
import (
|
||
"bytes"
|
||
"io"
|
||
"net/url"
|
||
"path"
|
||
"path/filepath"
|
||
"regexp"
|
||
"strings"
|
||
"sync"
|
||
|
||
"code.gitea.io/gitea/modules/base"
|
||
"code.gitea.io/gitea/modules/emoji"
|
||
"code.gitea.io/gitea/modules/git"
|
||
"code.gitea.io/gitea/modules/log"
|
||
"code.gitea.io/gitea/modules/markup/common"
|
||
"code.gitea.io/gitea/modules/references"
|
||
"code.gitea.io/gitea/modules/regexplru"
|
||
"code.gitea.io/gitea/modules/setting"
|
||
"code.gitea.io/gitea/modules/templates/vars"
|
||
"code.gitea.io/gitea/modules/translation"
|
||
"code.gitea.io/gitea/modules/util"
|
||
|
||
"golang.org/x/net/html"
|
||
"golang.org/x/net/html/atom"
|
||
"mvdan.cc/xurls/v2"
|
||
)
|
||
|
||
// Issue name styles
|
||
const (
|
||
IssueNameStyleNumeric = "numeric"
|
||
IssueNameStyleAlphanumeric = "alphanumeric"
|
||
IssueNameStyleRegexp = "regexp"
|
||
)
|
||
|
||
var (
|
||
// NOTE: All below regex matching do not perform any extra validation.
|
||
// Thus a link is produced even if the linked entity does not exist.
|
||
// While fast, this is also incorrect and lead to false positives.
|
||
// TODO: fix invalid linking issue
|
||
|
||
// valid chars in encoded path and parameter: [-+~_%.a-zA-Z0-9/]
|
||
|
||
// sha1CurrentPattern matches string that represents a commit SHA, e.g. d8a994ef243349f321568f9e36d5c3f444b99cae
|
||
// Although SHA1 hashes are 40 chars long, the regex matches the hash from 7 to 40 chars in length
|
||
// so that abbreviated hash links can be used as well. This matches git and GitHub usability.
|
||
sha1CurrentPattern = regexp.MustCompile(`(?:\s|^|\(|\[)([0-9a-f]{7,40})(?:\s|$|\)|\]|[.,](\s|$))`)
|
||
|
||
// shortLinkPattern matches short but difficult to parse [[name|link|arg=test]] syntax
|
||
shortLinkPattern = regexp.MustCompile(`\[\[(.*?)\]\](\w*)`)
|
||
|
||
// anySHA1Pattern splits url containing SHA into parts
|
||
anySHA1Pattern = regexp.MustCompile(`https?://(?:\S+/){4,5}([0-9a-f]{40})(/[-+~_%.a-zA-Z0-9/]+)?(#[-+~_%.a-zA-Z0-9]+)?`)
|
||
|
||
// comparePattern matches "http://domain/org/repo/compare/COMMIT1...COMMIT2#hash"
|
||
comparePattern = regexp.MustCompile(`https?://(?:\S+/){4,5}([0-9a-f]{7,40})(\.\.\.?)([0-9a-f]{7,40})?(#[-+~_%.a-zA-Z0-9]+)?`)
|
||
|
||
validLinksPattern = regexp.MustCompile(`^[a-z][\w-]+://`)
|
||
|
||
// While this email regex is definitely not perfect and I'm sure you can come up
|
||
// with edge cases, it is still accepted by the CommonMark specification, as
|
||
// well as the HTML5 spec:
|
||
// http://spec.commonmark.org/0.28/#email-address
|
||
// https://html.spec.whatwg.org/multipage/input.html#e-mail-state-(type%3Demail)
|
||
emailRegex = regexp.MustCompile("(?:\\s|^|\\(|\\[)([a-zA-Z0-9.!#$%&'*+\\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9]{2,}(?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+)(?:\\s|$|\\)|\\]|\\.(\\s|$))")
|
||
|
||
// blackfriday extensions create IDs like fn:user-content-footnote
|
||
blackfridayExtRegex = regexp.MustCompile(`[^:]*:user-content-`)
|
||
|
||
// EmojiShortCodeRegex find emoji by alias like :smile:
|
||
EmojiShortCodeRegex = regexp.MustCompile(`:[-+\w]+:`)
|
||
)
|
||
|
||
// CSS class for action keywords (e.g. "closes: #1")
|
||
const keywordClass = "issue-keyword"
|
||
|
||
// IsLink reports whether link fits valid format.
|
||
func IsLink(link []byte) bool {
|
||
return isLink(link)
|
||
}
|
||
|
||
// isLink reports whether link fits valid format.
|
||
func isLink(link []byte) bool {
|
||
return validLinksPattern.Match(link)
|
||
}
|
||
|
||
func isLinkStr(link string) bool {
|
||
return validLinksPattern.MatchString(link)
|
||
}
|
||
|
||
// regexp for full links to issues/pulls
|
||
var issueFullPattern *regexp.Regexp
|
||
|
||
// Once for to prevent races
|
||
var issueFullPatternOnce sync.Once
|
||
|
||
// regexp for full links to hash comment in pull request files changed tab
|
||
var filesChangedFullPattern *regexp.Regexp
|
||
|
||
// Once for to prevent races
|
||
var filesChangedFullPatternOnce sync.Once
|
||
|
||
func getIssueFullPattern() *regexp.Regexp {
|
||
issueFullPatternOnce.Do(func() {
|
||
// example: https://domain/org/repo/pulls/27#hash
|
||
issueFullPattern = regexp.MustCompile(regexp.QuoteMeta(setting.AppURL) +
|
||
`[\w_.-]+/[\w_.-]+/(?:issues|pulls)/((?:\w{1,10}-)?[1-9][0-9]*)([\?|#](\S+)?)?\b`)
|
||
})
|
||
return issueFullPattern
|
||
}
|
||
|
||
func getFilesChangedFullPattern() *regexp.Regexp {
|
||
filesChangedFullPatternOnce.Do(func() {
|
||
// example: https://domain/org/repo/pulls/27/files#hash
|
||
filesChangedFullPattern = regexp.MustCompile(regexp.QuoteMeta(setting.AppURL) +
|
||
`[\w_.-]+/[\w_.-]+/pulls/((?:\w{1,10}-)?[1-9][0-9]*)/files([\?|#](\S+)?)?\b`)
|
||
})
|
||
return filesChangedFullPattern
|
||
}
|
||
|
||
// CustomLinkURLSchemes allows for additional schemes to be detected when parsing links within text
|
||
func CustomLinkURLSchemes(schemes []string) {
|
||
schemes = append(schemes, "http", "https")
|
||
withAuth := make([]string, 0, len(schemes))
|
||
validScheme := regexp.MustCompile(`^[a-z]+$`)
|
||
for _, s := range schemes {
|
||
if !validScheme.MatchString(s) {
|
||
continue
|
||
}
|
||
without := false
|
||
for _, sna := range xurls.SchemesNoAuthority {
|
||
if s == sna {
|
||
without = true
|
||
break
|
||
}
|
||
}
|
||
if without {
|
||
s += ":"
|
||
} else {
|
||
s += "://"
|
||
}
|
||
withAuth = append(withAuth, s)
|
||
}
|
||
common.LinkRegex, _ = xurls.StrictMatchingScheme(strings.Join(withAuth, "|"))
|
||
}
|
||
|
||
// IsSameDomain checks if given url string has the same hostname as current Gitea instance
|
||
func IsSameDomain(s string) bool {
|
||
if strings.HasPrefix(s, "/") {
|
||
return true
|
||
}
|
||
if uapp, err := url.Parse(setting.AppURL); err == nil {
|
||
if u, err := url.Parse(s); err == nil {
|
||
return u.Host == uapp.Host
|
||
}
|
||
return false
|
||
}
|
||
return false
|
||
}
|
||
|
||
type postProcessError struct {
|
||
context string
|
||
err error
|
||
}
|
||
|
||
func (p *postProcessError) Error() string {
|
||
return "PostProcess: " + p.context + ", " + p.err.Error()
|
||
}
|
||
|
||
type processor func(ctx *RenderContext, node *html.Node)
|
||
|
||
var defaultProcessors = []processor{
|
||
fullIssuePatternProcessor,
|
||
comparePatternProcessor,
|
||
fullSha1PatternProcessor,
|
||
shortLinkProcessor,
|
||
linkProcessor,
|
||
mentionProcessor,
|
||
issueIndexPatternProcessor,
|
||
commitCrossReferencePatternProcessor,
|
||
sha1CurrentPatternProcessor,
|
||
emailAddressProcessor,
|
||
emojiProcessor,
|
||
emojiShortCodeProcessor,
|
||
}
|
||
|
||
// PostProcess does the final required transformations to the passed raw HTML
|
||
// data, and ensures its validity. Transformations include: replacing links and
|
||
// emails with HTML links, parsing shortlinks in the format of [[Link]], like
|
||
// MediaWiki, linking issues in the format #ID, and mentions in the format
|
||
// @user, and others.
|
||
func PostProcess(
|
||
ctx *RenderContext,
|
||
input io.Reader,
|
||
output io.Writer,
|
||
) error {
|
||
return postProcess(ctx, defaultProcessors, input, output)
|
||
}
|
||
|
||
var commitMessageProcessors = []processor{
|
||
fullIssuePatternProcessor,
|
||
comparePatternProcessor,
|
||
fullSha1PatternProcessor,
|
||
linkProcessor,
|
||
mentionProcessor,
|
||
issueIndexPatternProcessor,
|
||
commitCrossReferencePatternProcessor,
|
||
sha1CurrentPatternProcessor,
|
||
emailAddressProcessor,
|
||
emojiProcessor,
|
||
emojiShortCodeProcessor,
|
||
}
|
||
|
||
// RenderCommitMessage will use the same logic as PostProcess, but will disable
|
||
// the shortLinkProcessor and will add a defaultLinkProcessor if defaultLink is
|
||
// set, which changes every text node into a link to the passed default link.
|
||
func RenderCommitMessage(
|
||
ctx *RenderContext,
|
||
content string,
|
||
) (string, error) {
|
||
procs := commitMessageProcessors
|
||
if ctx.DefaultLink != "" {
|
||
// we don't have to fear data races, because being
|
||
// commitMessageProcessors of fixed len and cap, every time we append
|
||
// something to it the slice is realloc+copied, so append always
|
||
// generates the slice ex-novo.
|
||
procs = append(procs, genDefaultLinkProcessor(ctx.DefaultLink))
|
||
}
|
||
return renderProcessString(ctx, procs, content)
|
||
}
|
||
|
||
var commitMessageSubjectProcessors = []processor{
|
||
fullIssuePatternProcessor,
|
||
comparePatternProcessor,
|
||
fullSha1PatternProcessor,
|
||
linkProcessor,
|
||
mentionProcessor,
|
||
issueIndexPatternProcessor,
|
||
commitCrossReferencePatternProcessor,
|
||
sha1CurrentPatternProcessor,
|
||
emojiShortCodeProcessor,
|
||
emojiProcessor,
|
||
}
|
||
|
||
var emojiProcessors = []processor{
|
||
emojiShortCodeProcessor,
|
||
emojiProcessor,
|
||
}
|
||
|
||
// RenderCommitMessageSubject will use the same logic as PostProcess and
|
||
// RenderCommitMessage, but will disable the shortLinkProcessor and
|
||
// emailAddressProcessor, will add a defaultLinkProcessor if defaultLink is set,
|
||
// which changes every text node into a link to the passed default link.
|
||
func RenderCommitMessageSubject(
|
||
ctx *RenderContext,
|
||
content string,
|
||
) (string, error) {
|
||
procs := commitMessageSubjectProcessors
|
||
if ctx.DefaultLink != "" {
|
||
// we don't have to fear data races, because being
|
||
// commitMessageSubjectProcessors of fixed len and cap, every time we
|
||
// append something to it the slice is realloc+copied, so append always
|
||
// generates the slice ex-novo.
|
||
procs = append(procs, genDefaultLinkProcessor(ctx.DefaultLink))
|
||
}
|
||
return renderProcessString(ctx, procs, content)
|
||
}
|
||
|
||
// RenderIssueTitle to process title on individual issue/pull page
|
||
func RenderIssueTitle(
|
||
ctx *RenderContext,
|
||
title string,
|
||
) (string, error) {
|
||
return renderProcessString(ctx, []processor{
|
||
issueIndexPatternProcessor,
|
||
commitCrossReferencePatternProcessor,
|
||
sha1CurrentPatternProcessor,
|
||
emojiShortCodeProcessor,
|
||
emojiProcessor,
|
||
}, title)
|
||
}
|
||
|
||
func renderProcessString(ctx *RenderContext, procs []processor, content string) (string, error) {
|
||
var buf strings.Builder
|
||
if err := postProcess(ctx, procs, strings.NewReader(content), &buf); err != nil {
|
||
return "", err
|
||
}
|
||
return buf.String(), nil
|
||
}
|
||
|
||
// RenderDescriptionHTML will use similar logic as PostProcess, but will
|
||
// use a single special linkProcessor.
|
||
func RenderDescriptionHTML(
|
||
ctx *RenderContext,
|
||
content string,
|
||
) (string, error) {
|
||
return renderProcessString(ctx, []processor{
|
||
descriptionLinkProcessor,
|
||
emojiShortCodeProcessor,
|
||
emojiProcessor,
|
||
}, content)
|
||
}
|
||
|
||
// RenderEmoji for when we want to just process emoji and shortcodes
|
||
// in various places it isn't already run through the normal markdown processor
|
||
func RenderEmoji(
|
||
ctx *RenderContext,
|
||
content string,
|
||
) (string, error) {
|
||
return renderProcessString(ctx, emojiProcessors, content)
|
||
}
|
||
|
||
var (
|
||
tagCleaner = regexp.MustCompile(`<((?:/?\w+/\w+)|(?:/[\w ]+/)|(/?[hH][tT][mM][lL]\b)|(/?[hH][eE][aA][dD]\b))`)
|
||
nulCleaner = strings.NewReplacer("\000", "")
|
||
)
|
||
|
||
func postProcess(ctx *RenderContext, procs []processor, input io.Reader, output io.Writer) error {
|
||
defer ctx.Cancel()
|
||
// FIXME: don't read all content to memory
|
||
rawHTML, err := io.ReadAll(input)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
// parse the HTML
|
||
node, err := html.Parse(io.MultiReader(
|
||
// prepend "<html><body>"
|
||
strings.NewReader("<html><body>"),
|
||
// Strip out nuls - they're always invalid
|
||
bytes.NewReader(tagCleaner.ReplaceAll([]byte(nulCleaner.Replace(string(rawHTML))), []byte("<$1"))),
|
||
// close the tags
|
||
strings.NewReader("</body></html>"),
|
||
))
|
||
if err != nil {
|
||
return &postProcessError{"invalid HTML", err}
|
||
}
|
||
|
||
if node.Type == html.DocumentNode {
|
||
node = node.FirstChild
|
||
}
|
||
|
||
visitNode(ctx, procs, procs, node)
|
||
|
||
newNodes := make([]*html.Node, 0, 5)
|
||
|
||
if node.Data == "html" {
|
||
node = node.FirstChild
|
||
for node != nil && node.Data != "body" {
|
||
node = node.NextSibling
|
||
}
|
||
}
|
||
if node != nil {
|
||
if node.Data == "body" {
|
||
child := node.FirstChild
|
||
for child != nil {
|
||
newNodes = append(newNodes, child)
|
||
child = child.NextSibling
|
||
}
|
||
} else {
|
||
newNodes = append(newNodes, node)
|
||
}
|
||
}
|
||
|
||
// Render everything to buf.
|
||
for _, node := range newNodes {
|
||
if err := html.Render(output, node); err != nil {
|
||
return &postProcessError{"error rendering processed HTML", err}
|
||
}
|
||
}
|
||
return nil
|
||
}
|
||
|
||
func visitNode(ctx *RenderContext, procs, textProcs []processor, node *html.Node) {
|
||
// Add user-content- to IDs and "#" links if they don't already have them
|
||
for idx, attr := range node.Attr {
|
||
val := strings.TrimPrefix(attr.Val, "#")
|
||
notHasPrefix := !(strings.HasPrefix(val, "user-content-") || blackfridayExtRegex.MatchString(val))
|
||
|
||
if attr.Key == "id" && notHasPrefix {
|
||
node.Attr[idx].Val = "user-content-" + attr.Val
|
||
}
|
||
|
||
if attr.Key == "href" && strings.HasPrefix(attr.Val, "#") && notHasPrefix {
|
||
node.Attr[idx].Val = "#user-content-" + val
|
||
}
|
||
|
||
if attr.Key == "class" && attr.Val == "emoji" {
|
||
textProcs = nil
|
||
}
|
||
}
|
||
|
||
// We ignore code and pre.
|
||
switch node.Type {
|
||
case html.TextNode:
|
||
textNode(ctx, textProcs, node)
|
||
case html.ElementNode:
|
||
if node.Data == "img" {
|
||
for i, attr := range node.Attr {
|
||
if attr.Key != "src" {
|
||
continue
|
||
}
|
||
if len(attr.Val) > 0 && !isLinkStr(attr.Val) && !strings.HasPrefix(attr.Val, "data:image/") {
|
||
prefix := ctx.URLPrefix
|
||
if ctx.IsWiki {
|
||
prefix = util.URLJoin(prefix, "wiki", "raw")
|
||
}
|
||
prefix = strings.Replace(prefix, "/src/", "/media/", 1)
|
||
|
||
attr.Val = util.URLJoin(prefix, attr.Val)
|
||
}
|
||
attr.Val = camoHandleLink(attr.Val)
|
||
node.Attr[i] = attr
|
||
}
|
||
} else if node.Data == "a" {
|
||
// Restrict text in links to emojis
|
||
textProcs = emojiProcessors
|
||
} else if node.Data == "code" || node.Data == "pre" {
|
||
return
|
||
} else if node.Data == "i" {
|
||
for _, attr := range node.Attr {
|
||
if attr.Key != "class" {
|
||
continue
|
||
}
|
||
classes := strings.Split(attr.Val, " ")
|
||
for i, class := range classes {
|
||
if class == "icon" {
|
||
classes[0], classes[i] = classes[i], classes[0]
|
||
attr.Val = strings.Join(classes, " ")
|
||
|
||
// Remove all children of icons
|
||
child := node.FirstChild
|
||
for child != nil {
|
||
node.RemoveChild(child)
|
||
child = node.FirstChild
|
||
}
|
||
break
|
||
}
|
||
}
|
||
}
|
||
}
|
||
for n := node.FirstChild; n != nil; n = n.NextSibling {
|
||
visitNode(ctx, procs, textProcs, n)
|
||
}
|
||
}
|
||
// ignore everything else
|
||
}
|
||
|
||
// textNode runs the passed node through various processors, in order to handle
|
||
// all kinds of special links handled by the post-processing.
|
||
func textNode(ctx *RenderContext, procs []processor, node *html.Node) {
|
||
for _, processor := range procs {
|
||
processor(ctx, node)
|
||
}
|
||
}
|
||
|
||
// createKeyword() renders a highlighted version of an action keyword
|
||
func createKeyword(content string) *html.Node {
|
||
span := &html.Node{
|
||
Type: html.ElementNode,
|
||
Data: atom.Span.String(),
|
||
Attr: []html.Attribute{},
|
||
}
|
||
span.Attr = append(span.Attr, html.Attribute{Key: "class", Val: keywordClass})
|
||
|
||
text := &html.Node{
|
||
Type: html.TextNode,
|
||
Data: content,
|
||
}
|
||
span.AppendChild(text)
|
||
|
||
return span
|
||
}
|
||
|
||
func createEmoji(content, class, name string) *html.Node {
|
||
span := &html.Node{
|
||
Type: html.ElementNode,
|
||
Data: atom.Span.String(),
|
||
Attr: []html.Attribute{},
|
||
}
|
||
if class != "" {
|
||
span.Attr = append(span.Attr, html.Attribute{Key: "class", Val: class})
|
||
}
|
||
if name != "" {
|
||
span.Attr = append(span.Attr, html.Attribute{Key: "aria-label", Val: name})
|
||
}
|
||
|
||
text := &html.Node{
|
||
Type: html.TextNode,
|
||
Data: content,
|
||
}
|
||
|
||
span.AppendChild(text)
|
||
return span
|
||
}
|
||
|
||
func createCustomEmoji(alias string) *html.Node {
|
||
span := &html.Node{
|
||
Type: html.ElementNode,
|
||
Data: atom.Span.String(),
|
||
Attr: []html.Attribute{},
|
||
}
|
||
span.Attr = append(span.Attr, html.Attribute{Key: "class", Val: "emoji"})
|
||
span.Attr = append(span.Attr, html.Attribute{Key: "aria-label", Val: alias})
|
||
|
||
img := &html.Node{
|
||
Type: html.ElementNode,
|
||
DataAtom: atom.Img,
|
||
Data: "img",
|
||
Attr: []html.Attribute{},
|
||
}
|
||
img.Attr = append(img.Attr, html.Attribute{Key: "alt", Val: ":" + alias + ":"})
|
||
img.Attr = append(img.Attr, html.Attribute{Key: "src", Val: setting.StaticURLPrefix + "/assets/img/emoji/" + alias + ".png"})
|
||
|
||
span.AppendChild(img)
|
||
return span
|
||
}
|
||
|
||
func createLink(href, content, class string) *html.Node {
|
||
a := &html.Node{
|
||
Type: html.ElementNode,
|
||
Data: atom.A.String(),
|
||
Attr: []html.Attribute{{Key: "href", Val: href}},
|
||
}
|
||
|
||
if class != "" {
|
||
a.Attr = append(a.Attr, html.Attribute{Key: "class", Val: class})
|
||
}
|
||
|
||
text := &html.Node{
|
||
Type: html.TextNode,
|
||
Data: content,
|
||
}
|
||
|
||
a.AppendChild(text)
|
||
return a
|
||
}
|
||
|
||
func createCodeLink(href, content, class string) *html.Node {
|
||
a := &html.Node{
|
||
Type: html.ElementNode,
|
||
Data: atom.A.String(),
|
||
Attr: []html.Attribute{{Key: "href", Val: href}},
|
||
}
|
||
|
||
if class != "" {
|
||
a.Attr = append(a.Attr, html.Attribute{Key: "class", Val: class})
|
||
}
|
||
|
||
text := &html.Node{
|
||
Type: html.TextNode,
|
||
Data: content,
|
||
}
|
||
|
||
code := &html.Node{
|
||
Type: html.ElementNode,
|
||
Data: atom.Code.String(),
|
||
Attr: []html.Attribute{{Key: "class", Val: "nohighlight"}},
|
||
}
|
||
|
||
code.AppendChild(text)
|
||
a.AppendChild(code)
|
||
return a
|
||
}
|
||
|
||
// replaceContent takes text node, and in its content it replaces a section of
|
||
// it with the specified newNode.
|
||
func replaceContent(node *html.Node, i, j int, newNode *html.Node) {
|
||
replaceContentList(node, i, j, []*html.Node{newNode})
|
||
}
|
||
|
||
// replaceContentList takes text node, and in its content it replaces a section of
|
||
// it with the specified newNodes. An example to visualize how this can work can
|
||
// be found here: https://play.golang.org/p/5zP8NnHZ03s
|
||
func replaceContentList(node *html.Node, i, j int, newNodes []*html.Node) {
|
||
// get the data before and after the match
|
||
before := node.Data[:i]
|
||
after := node.Data[j:]
|
||
|
||
// Replace in the current node the text, so that it is only what it is
|
||
// supposed to have.
|
||
node.Data = before
|
||
|
||
// Get the current next sibling, before which we place the replaced data,
|
||
// and after that we place the new text node.
|
||
nextSibling := node.NextSibling
|
||
for _, n := range newNodes {
|
||
node.Parent.InsertBefore(n, nextSibling)
|
||
}
|
||
if after != "" {
|
||
node.Parent.InsertBefore(&html.Node{
|
||
Type: html.TextNode,
|
||
Data: after,
|
||
}, nextSibling)
|
||
}
|
||
}
|
||
|
||
func mentionProcessor(ctx *RenderContext, node *html.Node) {
|
||
start := 0
|
||
next := node.NextSibling
|
||
for node != nil && node != next && start < len(node.Data) {
|
||
// We replace only the first mention; other mentions will be addressed later
|
||
found, loc := references.FindFirstMentionBytes([]byte(node.Data[start:]))
|
||
if !found {
|
||
return
|
||
}
|
||
loc.Start += start
|
||
loc.End += start
|
||
mention := node.Data[loc.Start:loc.End]
|
||
var teams string
|
||
teams, ok := ctx.Metas["teams"]
|
||
// FIXME: util.URLJoin may not be necessary here:
|
||
// - setting.AppURL is defined to have a terminal '/' so unless mention[1:]
|
||
// is an AppSubURL link we can probably fallback to concatenation.
|
||
// team mention should follow @orgName/teamName style
|
||
if ok && strings.Contains(mention, "/") {
|
||
mentionOrgAndTeam := strings.Split(mention, "/")
|
||
if mentionOrgAndTeam[0][1:] == ctx.Metas["org"] && strings.Contains(teams, ","+strings.ToLower(mentionOrgAndTeam[1])+",") {
|
||
replaceContent(node, loc.Start, loc.End, createLink(util.URLJoin(setting.AppURL, "org", ctx.Metas["org"], "teams", mentionOrgAndTeam[1]), mention, "mention"))
|
||
node = node.NextSibling.NextSibling
|
||
start = 0
|
||
continue
|
||
}
|
||
start = loc.End
|
||
continue
|
||
}
|
||
mentionedUsername := mention[1:]
|
||
|
||
if DefaultProcessorHelper.IsUsernameMentionable != nil && DefaultProcessorHelper.IsUsernameMentionable(ctx.Ctx, mentionedUsername) {
|
||
replaceContent(node, loc.Start, loc.End, createLink(util.URLJoin(setting.AppURL, mentionedUsername), mention, "mention"))
|
||
node = node.NextSibling.NextSibling
|
||
} else {
|
||
node = node.NextSibling
|
||
}
|
||
start = 0
|
||
}
|
||
}
|
||
|
||
func shortLinkProcessor(ctx *RenderContext, node *html.Node) {
|
||
shortLinkProcessorFull(ctx, node, false)
|
||
}
|
||
|
||
func shortLinkProcessorFull(ctx *RenderContext, node *html.Node, noLink bool) {
|
||
next := node.NextSibling
|
||
for node != nil && node != next {
|
||
m := shortLinkPattern.FindStringSubmatchIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
|
||
content := node.Data[m[2]:m[3]]
|
||
tail := node.Data[m[4]:m[5]]
|
||
props := make(map[string]string)
|
||
|
||
// MediaWiki uses [[link|text]], while GitHub uses [[text|link]]
|
||
// It makes page handling terrible, but we prefer GitHub syntax
|
||
// And fall back to MediaWiki only when it is obvious from the look
|
||
// Of text and link contents
|
||
sl := strings.Split(content, "|")
|
||
for _, v := range sl {
|
||
if equalPos := strings.IndexByte(v, '='); equalPos == -1 {
|
||
// There is no equal in this argument; this is a mandatory arg
|
||
if props["name"] == "" {
|
||
if isLinkStr(v) {
|
||
// If we clearly see it is a link, we save it so
|
||
|
||
// But first we need to ensure, that if both mandatory args provided
|
||
// look like links, we stick to GitHub syntax
|
||
if props["link"] != "" {
|
||
props["name"] = props["link"]
|
||
}
|
||
|
||
props["link"] = strings.TrimSpace(v)
|
||
} else {
|
||
props["name"] = v
|
||
}
|
||
} else {
|
||
props["link"] = strings.TrimSpace(v)
|
||
}
|
||
} else {
|
||
// There is an equal; optional argument.
|
||
|
||
sep := strings.IndexByte(v, '=')
|
||
key, val := v[:sep], html.UnescapeString(v[sep+1:])
|
||
|
||
// When parsing HTML, x/net/html will change all quotes which are
|
||
// not used for syntax into UTF-8 quotes. So checking val[0] won't
|
||
// be enough, since that only checks a single byte.
|
||
if len(val) > 1 {
|
||
if (strings.HasPrefix(val, "“") && strings.HasSuffix(val, "”")) ||
|
||
(strings.HasPrefix(val, "‘") && strings.HasSuffix(val, "’")) {
|
||
const lenQuote = len("‘")
|
||
val = val[lenQuote : len(val)-lenQuote]
|
||
} else if (strings.HasPrefix(val, "\"") && strings.HasSuffix(val, "\"")) ||
|
||
(strings.HasPrefix(val, "'") && strings.HasSuffix(val, "'")) {
|
||
val = val[1 : len(val)-1]
|
||
} else if strings.HasPrefix(val, "'") && strings.HasSuffix(val, "’") {
|
||
const lenQuote = len("‘")
|
||
val = val[1 : len(val)-lenQuote]
|
||
}
|
||
}
|
||
props[key] = val
|
||
}
|
||
}
|
||
|
||
var name, link string
|
||
if props["link"] != "" {
|
||
link = props["link"]
|
||
} else if props["name"] != "" {
|
||
link = props["name"]
|
||
}
|
||
if props["title"] != "" {
|
||
name = props["title"]
|
||
} else if props["name"] != "" {
|
||
name = props["name"]
|
||
} else {
|
||
name = link
|
||
}
|
||
|
||
name += tail
|
||
image := false
|
||
switch ext := filepath.Ext(link); ext {
|
||
// fast path: empty string, ignore
|
||
case "":
|
||
// leave image as false
|
||
case ".jpg", ".jpeg", ".png", ".tif", ".tiff", ".webp", ".gif", ".bmp", ".ico", ".svg":
|
||
image = true
|
||
}
|
||
|
||
childNode := &html.Node{}
|
||
linkNode := &html.Node{
|
||
FirstChild: childNode,
|
||
LastChild: childNode,
|
||
Type: html.ElementNode,
|
||
Data: "a",
|
||
DataAtom: atom.A,
|
||
}
|
||
childNode.Parent = linkNode
|
||
absoluteLink := isLinkStr(link)
|
||
if !absoluteLink {
|
||
if image {
|
||
link = strings.ReplaceAll(link, " ", "+")
|
||
} else {
|
||
link = strings.ReplaceAll(link, " ", "-")
|
||
}
|
||
if !strings.Contains(link, "/") {
|
||
link = url.PathEscape(link)
|
||
}
|
||
}
|
||
urlPrefix := ctx.URLPrefix
|
||
if image {
|
||
if !absoluteLink {
|
||
if IsSameDomain(urlPrefix) {
|
||
urlPrefix = strings.Replace(urlPrefix, "/src/", "/raw/", 1)
|
||
}
|
||
if ctx.IsWiki {
|
||
link = util.URLJoin("wiki", "raw", link)
|
||
}
|
||
link = util.URLJoin(urlPrefix, link)
|
||
}
|
||
title := props["title"]
|
||
if title == "" {
|
||
title = props["alt"]
|
||
}
|
||
if title == "" {
|
||
title = path.Base(name)
|
||
}
|
||
alt := props["alt"]
|
||
if alt == "" {
|
||
alt = name
|
||
}
|
||
|
||
// make the childNode an image - if we can, we also place the alt
|
||
childNode.Type = html.ElementNode
|
||
childNode.Data = "img"
|
||
childNode.DataAtom = atom.Img
|
||
childNode.Attr = []html.Attribute{
|
||
{Key: "src", Val: link},
|
||
{Key: "title", Val: title},
|
||
{Key: "alt", Val: alt},
|
||
}
|
||
if alt == "" {
|
||
childNode.Attr = childNode.Attr[:2]
|
||
}
|
||
} else {
|
||
if !absoluteLink {
|
||
if ctx.IsWiki {
|
||
link = util.URLJoin("wiki", link)
|
||
}
|
||
link = util.URLJoin(urlPrefix, link)
|
||
}
|
||
childNode.Type = html.TextNode
|
||
childNode.Data = name
|
||
}
|
||
if noLink {
|
||
linkNode = childNode
|
||
} else {
|
||
linkNode.Attr = []html.Attribute{{Key: "href", Val: link}}
|
||
}
|
||
replaceContent(node, m[0], m[1], linkNode)
|
||
node = node.NextSibling.NextSibling
|
||
}
|
||
}
|
||
|
||
func fullIssuePatternProcessor(ctx *RenderContext, node *html.Node) {
|
||
if ctx.Metas == nil {
|
||
return
|
||
}
|
||
next := node.NextSibling
|
||
for node != nil && node != next {
|
||
m := getIssueFullPattern().FindStringSubmatchIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
|
||
mDiffView := getFilesChangedFullPattern().FindStringSubmatchIndex(node.Data)
|
||
// leave it as it is if the link is from "Files Changed" tab in PR Diff View https://domain/org/repo/pulls/27/files
|
||
if mDiffView != nil {
|
||
return
|
||
}
|
||
|
||
link := node.Data[m[0]:m[1]]
|
||
text := "#" + node.Data[m[2]:m[3]]
|
||
// if m[4] and m[5] is not -1, then link is to a comment
|
||
// indicate that in the text by appending (comment)
|
||
if m[4] != -1 && m[5] != -1 {
|
||
if locale, ok := ctx.Ctx.Value(translation.ContextKey).(translation.Locale); ok {
|
||
text += " " + locale.Tr("repo.from_comment")
|
||
} else {
|
||
text += " (comment)"
|
||
}
|
||
}
|
||
|
||
// extract repo and org name from matched link like
|
||
// http://localhost:3000/gituser/myrepo/issues/1
|
||
linkParts := strings.Split(link, "/")
|
||
matchOrg := linkParts[len(linkParts)-4]
|
||
matchRepo := linkParts[len(linkParts)-3]
|
||
|
||
if matchOrg == ctx.Metas["user"] && matchRepo == ctx.Metas["repo"] {
|
||
replaceContent(node, m[0], m[1], createLink(link, text, "ref-issue"))
|
||
} else {
|
||
text = matchOrg + "/" + matchRepo + text
|
||
replaceContent(node, m[0], m[1], createLink(link, text, "ref-issue"))
|
||
}
|
||
node = node.NextSibling.NextSibling
|
||
}
|
||
}
|
||
|
||
func issueIndexPatternProcessor(ctx *RenderContext, node *html.Node) {
|
||
if ctx.Metas == nil {
|
||
return
|
||
}
|
||
var (
|
||
found bool
|
||
ref *references.RenderizableReference
|
||
)
|
||
|
||
next := node.NextSibling
|
||
|
||
for node != nil && node != next {
|
||
_, hasExtTrackFormat := ctx.Metas["format"]
|
||
|
||
// Repos with external issue trackers might still need to reference local PRs
|
||
// We need to concern with the first one that shows up in the text, whichever it is
|
||
isNumericStyle := ctx.Metas["style"] == "" || ctx.Metas["style"] == IssueNameStyleNumeric
|
||
foundNumeric, refNumeric := references.FindRenderizableReferenceNumeric(node.Data, hasExtTrackFormat && !isNumericStyle)
|
||
|
||
switch ctx.Metas["style"] {
|
||
case "", IssueNameStyleNumeric:
|
||
found, ref = foundNumeric, refNumeric
|
||
case IssueNameStyleAlphanumeric:
|
||
found, ref = references.FindRenderizableReferenceAlphanumeric(node.Data)
|
||
case IssueNameStyleRegexp:
|
||
pattern, err := regexplru.GetCompiled(ctx.Metas["regexp"])
|
||
if err != nil {
|
||
return
|
||
}
|
||
found, ref = references.FindRenderizableReferenceRegexp(node.Data, pattern)
|
||
}
|
||
|
||
// Repos with external issue trackers might still need to reference local PRs
|
||
// We need to concern with the first one that shows up in the text, whichever it is
|
||
if hasExtTrackFormat && !isNumericStyle && refNumeric != nil {
|
||
// If numeric (PR) was found, and it was BEFORE the non-numeric pattern, use that
|
||
// Allow a free-pass when non-numeric pattern wasn't found.
|
||
if found && (ref == nil || refNumeric.RefLocation.Start < ref.RefLocation.Start) {
|
||
found = foundNumeric
|
||
ref = refNumeric
|
||
}
|
||
}
|
||
if !found {
|
||
return
|
||
}
|
||
|
||
var link *html.Node
|
||
reftext := node.Data[ref.RefLocation.Start:ref.RefLocation.End]
|
||
if hasExtTrackFormat && !ref.IsPull {
|
||
ctx.Metas["index"] = ref.Issue
|
||
|
||
res, err := vars.Expand(ctx.Metas["format"], ctx.Metas)
|
||
if err != nil {
|
||
// here we could just log the error and continue the rendering
|
||
log.Error("unable to expand template vars for ref %s, err: %v", ref.Issue, err)
|
||
}
|
||
|
||
link = createLink(res, reftext, "ref-issue ref-external-issue")
|
||
} else {
|
||
// Path determines the type of link that will be rendered. It's unknown at this point whether
|
||
// the linked item is actually a PR or an issue. Luckily it's of no real consequence because
|
||
// Gitea will redirect on click as appropriate.
|
||
path := "issues"
|
||
if ref.IsPull {
|
||
path = "pulls"
|
||
}
|
||
if ref.Owner == "" {
|
||
link = createLink(util.URLJoin(setting.AppURL, ctx.Metas["user"], ctx.Metas["repo"], path, ref.Issue), reftext, "ref-issue")
|
||
} else {
|
||
link = createLink(util.URLJoin(setting.AppURL, ref.Owner, ref.Name, path, ref.Issue), reftext, "ref-issue")
|
||
}
|
||
}
|
||
|
||
if ref.Action == references.XRefActionNone {
|
||
replaceContent(node, ref.RefLocation.Start, ref.RefLocation.End, link)
|
||
node = node.NextSibling.NextSibling
|
||
continue
|
||
}
|
||
|
||
// Decorate action keywords if actionable
|
||
var keyword *html.Node
|
||
if references.IsXrefActionable(ref, hasExtTrackFormat) {
|
||
keyword = createKeyword(node.Data[ref.ActionLocation.Start:ref.ActionLocation.End])
|
||
} else {
|
||
keyword = &html.Node{
|
||
Type: html.TextNode,
|
||
Data: node.Data[ref.ActionLocation.Start:ref.ActionLocation.End],
|
||
}
|
||
}
|
||
spaces := &html.Node{
|
||
Type: html.TextNode,
|
||
Data: node.Data[ref.ActionLocation.End:ref.RefLocation.Start],
|
||
}
|
||
replaceContentList(node, ref.ActionLocation.Start, ref.RefLocation.End, []*html.Node{keyword, spaces, link})
|
||
node = node.NextSibling.NextSibling.NextSibling.NextSibling
|
||
}
|
||
}
|
||
|
||
func commitCrossReferencePatternProcessor(ctx *RenderContext, node *html.Node) {
|
||
next := node.NextSibling
|
||
|
||
for node != nil && node != next {
|
||
found, ref := references.FindRenderizableCommitCrossReference(node.Data)
|
||
if !found {
|
||
return
|
||
}
|
||
|
||
reftext := ref.Owner + "/" + ref.Name + "@" + base.ShortSha(ref.CommitSha)
|
||
link := createLink(util.URLJoin(setting.AppSubURL, ref.Owner, ref.Name, "commit", ref.CommitSha), reftext, "commit")
|
||
|
||
replaceContent(node, ref.RefLocation.Start, ref.RefLocation.End, link)
|
||
node = node.NextSibling.NextSibling
|
||
}
|
||
}
|
||
|
||
// fullSha1PatternProcessor renders SHA containing URLs
|
||
func fullSha1PatternProcessor(ctx *RenderContext, node *html.Node) {
|
||
if ctx.Metas == nil {
|
||
return
|
||
}
|
||
|
||
next := node.NextSibling
|
||
for node != nil && node != next {
|
||
m := anySHA1Pattern.FindStringSubmatchIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
|
||
urlFull := node.Data[m[0]:m[1]]
|
||
text := base.ShortSha(node.Data[m[2]:m[3]])
|
||
|
||
// 3rd capture group matches a optional path
|
||
subpath := ""
|
||
if m[5] > 0 {
|
||
subpath = node.Data[m[4]:m[5]]
|
||
}
|
||
|
||
// 4th capture group matches a optional url hash
|
||
hash := ""
|
||
if m[7] > 0 {
|
||
hash = node.Data[m[6]:m[7]][1:]
|
||
}
|
||
|
||
start := m[0]
|
||
end := m[1]
|
||
|
||
// If url ends in '.', it's very likely that it is not part of the
|
||
// actual url but used to finish a sentence.
|
||
if strings.HasSuffix(urlFull, ".") {
|
||
end--
|
||
urlFull = urlFull[:len(urlFull)-1]
|
||
if hash != "" {
|
||
hash = hash[:len(hash)-1]
|
||
} else if subpath != "" {
|
||
subpath = subpath[:len(subpath)-1]
|
||
}
|
||
}
|
||
|
||
if subpath != "" {
|
||
text += subpath
|
||
}
|
||
|
||
if hash != "" {
|
||
text += " (" + hash + ")"
|
||
}
|
||
replaceContent(node, start, end, createCodeLink(urlFull, text, "commit"))
|
||
node = node.NextSibling.NextSibling
|
||
}
|
||
}
|
||
|
||
func comparePatternProcessor(ctx *RenderContext, node *html.Node) {
|
||
if ctx.Metas == nil {
|
||
return
|
||
}
|
||
|
||
next := node.NextSibling
|
||
for node != nil && node != next {
|
||
m := comparePattern.FindStringSubmatchIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
|
||
// Ensure that every group (m[0]...m[7]) has a match
|
||
for i := 0; i < 8; i++ {
|
||
if m[i] == -1 {
|
||
return
|
||
}
|
||
}
|
||
|
||
urlFull := node.Data[m[0]:m[1]]
|
||
text1 := base.ShortSha(node.Data[m[2]:m[3]])
|
||
textDots := base.ShortSha(node.Data[m[4]:m[5]])
|
||
text2 := base.ShortSha(node.Data[m[6]:m[7]])
|
||
|
||
hash := ""
|
||
if m[9] > 0 {
|
||
hash = node.Data[m[8]:m[9]][1:]
|
||
}
|
||
|
||
start := m[0]
|
||
end := m[1]
|
||
|
||
// If url ends in '.', it's very likely that it is not part of the
|
||
// actual url but used to finish a sentence.
|
||
if strings.HasSuffix(urlFull, ".") {
|
||
end--
|
||
urlFull = urlFull[:len(urlFull)-1]
|
||
if hash != "" {
|
||
hash = hash[:len(hash)-1]
|
||
} else if text2 != "" {
|
||
text2 = text2[:len(text2)-1]
|
||
}
|
||
}
|
||
|
||
text := text1 + textDots + text2
|
||
if hash != "" {
|
||
text += " (" + hash + ")"
|
||
}
|
||
replaceContent(node, start, end, createCodeLink(urlFull, text, "compare"))
|
||
node = node.NextSibling.NextSibling
|
||
}
|
||
}
|
||
|
||
// emojiShortCodeProcessor for rendering text like :smile: into emoji
|
||
func emojiShortCodeProcessor(ctx *RenderContext, node *html.Node) {
|
||
start := 0
|
||
next := node.NextSibling
|
||
for node != nil && node != next && start < len(node.Data) {
|
||
m := EmojiShortCodeRegex.FindStringSubmatchIndex(node.Data[start:])
|
||
if m == nil {
|
||
return
|
||
}
|
||
m[0] += start
|
||
m[1] += start
|
||
|
||
start = m[1]
|
||
|
||
alias := node.Data[m[0]:m[1]]
|
||
alias = strings.ReplaceAll(alias, ":", "")
|
||
converted := emoji.FromAlias(alias)
|
||
if converted == nil {
|
||
// check if this is a custom reaction
|
||
if _, exist := setting.UI.CustomEmojisMap[alias]; exist {
|
||
replaceContent(node, m[0], m[1], createCustomEmoji(alias))
|
||
node = node.NextSibling.NextSibling
|
||
start = 0
|
||
continue
|
||
}
|
||
continue
|
||
}
|
||
|
||
replaceContent(node, m[0], m[1], createEmoji(converted.Emoji, "emoji", converted.Description))
|
||
node = node.NextSibling.NextSibling
|
||
start = 0
|
||
}
|
||
}
|
||
|
||
// emoji processor to match emoji and add emoji class
|
||
func emojiProcessor(ctx *RenderContext, node *html.Node) {
|
||
start := 0
|
||
next := node.NextSibling
|
||
for node != nil && node != next && start < len(node.Data) {
|
||
m := emoji.FindEmojiSubmatchIndex(node.Data[start:])
|
||
if m == nil {
|
||
return
|
||
}
|
||
m[0] += start
|
||
m[1] += start
|
||
|
||
codepoint := node.Data[m[0]:m[1]]
|
||
start = m[1]
|
||
val := emoji.FromCode(codepoint)
|
||
if val != nil {
|
||
replaceContent(node, m[0], m[1], createEmoji(codepoint, "emoji", val.Description))
|
||
node = node.NextSibling.NextSibling
|
||
start = 0
|
||
}
|
||
}
|
||
}
|
||
|
||
// sha1CurrentPatternProcessor renders SHA1 strings to corresponding links that
|
||
// are assumed to be in the same repository.
|
||
func sha1CurrentPatternProcessor(ctx *RenderContext, node *html.Node) {
|
||
if ctx.Metas == nil || ctx.Metas["user"] == "" || ctx.Metas["repo"] == "" || ctx.Metas["repoPath"] == "" {
|
||
return
|
||
}
|
||
|
||
start := 0
|
||
next := node.NextSibling
|
||
if ctx.ShaExistCache == nil {
|
||
ctx.ShaExistCache = make(map[string]bool)
|
||
}
|
||
for node != nil && node != next && start < len(node.Data) {
|
||
m := sha1CurrentPattern.FindStringSubmatchIndex(node.Data[start:])
|
||
if m == nil {
|
||
return
|
||
}
|
||
m[2] += start
|
||
m[3] += start
|
||
|
||
hash := node.Data[m[2]:m[3]]
|
||
// The regex does not lie, it matches the hash pattern.
|
||
// However, a regex cannot know if a hash actually exists or not.
|
||
// We could assume that a SHA1 hash should probably contain alphas AND numerics
|
||
// but that is not always the case.
|
||
// Although unlikely, deadbeef and 1234567 are valid short forms of SHA1 hash
|
||
// as used by git and github for linking and thus we have to do similar.
|
||
// Because of this, we check to make sure that a matched hash is actually
|
||
// a commit in the repository before making it a link.
|
||
|
||
// check cache first
|
||
exist, inCache := ctx.ShaExistCache[hash]
|
||
if !inCache {
|
||
if ctx.GitRepo == nil {
|
||
var err error
|
||
ctx.GitRepo, err = git.OpenRepository(ctx.Ctx, ctx.Metas["repoPath"])
|
||
if err != nil {
|
||
log.Error("unable to open repository: %s Error: %v", ctx.Metas["repoPath"], err)
|
||
return
|
||
}
|
||
ctx.AddCancel(func() {
|
||
ctx.GitRepo.Close()
|
||
ctx.GitRepo = nil
|
||
})
|
||
}
|
||
|
||
exist = ctx.GitRepo.IsObjectExist(hash)
|
||
ctx.ShaExistCache[hash] = exist
|
||
}
|
||
|
||
if !exist {
|
||
start = m[3]
|
||
continue
|
||
}
|
||
|
||
link := util.URLJoin(setting.AppURL, ctx.Metas["user"], ctx.Metas["repo"], "commit", hash)
|
||
replaceContent(node, m[2], m[3], createCodeLink(link, base.ShortSha(hash), "commit"))
|
||
start = 0
|
||
node = node.NextSibling.NextSibling
|
||
}
|
||
}
|
||
|
||
// emailAddressProcessor replaces raw email addresses with a mailto: link.
|
||
func emailAddressProcessor(ctx *RenderContext, node *html.Node) {
|
||
next := node.NextSibling
|
||
for node != nil && node != next {
|
||
m := emailRegex.FindStringSubmatchIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
|
||
mail := node.Data[m[2]:m[3]]
|
||
replaceContent(node, m[2], m[3], createLink("mailto:"+mail, mail, "mailto"))
|
||
node = node.NextSibling.NextSibling
|
||
}
|
||
}
|
||
|
||
// linkProcessor creates links for any HTTP or HTTPS URL not captured by
|
||
// markdown.
|
||
func linkProcessor(ctx *RenderContext, node *html.Node) {
|
||
next := node.NextSibling
|
||
for node != nil && node != next {
|
||
m := common.LinkRegex.FindStringIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
|
||
uri := node.Data[m[0]:m[1]]
|
||
replaceContent(node, m[0], m[1], createLink(uri, uri, "link"))
|
||
node = node.NextSibling.NextSibling
|
||
}
|
||
}
|
||
|
||
func genDefaultLinkProcessor(defaultLink string) processor {
|
||
return func(ctx *RenderContext, node *html.Node) {
|
||
ch := &html.Node{
|
||
Parent: node,
|
||
Type: html.TextNode,
|
||
Data: node.Data,
|
||
}
|
||
|
||
node.Type = html.ElementNode
|
||
node.Data = "a"
|
||
node.DataAtom = atom.A
|
||
node.Attr = []html.Attribute{
|
||
{Key: "href", Val: defaultLink},
|
||
{Key: "class", Val: "default-link muted"},
|
||
}
|
||
node.FirstChild, node.LastChild = ch, ch
|
||
}
|
||
}
|
||
|
||
// descriptionLinkProcessor creates links for DescriptionHTML
|
||
func descriptionLinkProcessor(ctx *RenderContext, node *html.Node) {
|
||
next := node.NextSibling
|
||
for node != nil && node != next {
|
||
m := common.LinkRegex.FindStringIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
|
||
uri := node.Data[m[0]:m[1]]
|
||
replaceContent(node, m[0], m[1], createDescriptionLink(uri, uri))
|
||
node = node.NextSibling.NextSibling
|
||
}
|
||
}
|
||
|
||
func createDescriptionLink(href, content string) *html.Node {
|
||
textNode := &html.Node{
|
||
Type: html.TextNode,
|
||
Data: content,
|
||
}
|
||
linkNode := &html.Node{
|
||
FirstChild: textNode,
|
||
LastChild: textNode,
|
||
Type: html.ElementNode,
|
||
Data: "a",
|
||
DataAtom: atom.A,
|
||
Attr: []html.Attribute{
|
||
{Key: "href", Val: href},
|
||
{Key: "target", Val: "_blank"},
|
||
{Key: "rel", Val: "noopener noreferrer"},
|
||
},
|
||
}
|
||
textNode.Parent = linkNode
|
||
return linkNode
|
||
}
|