mirror of
https://codeberg.org/forgejo/forgejo.git
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Restructure markup & markdown to prepare for multiple markup language… (#2411)
* restructure markup & markdown to prepare for multiple markup languages support * adjust some functions between markdown and markup * fix tests * improve the comments
This commit is contained in:
Lunny Xiao
Lauris BH
parent
911ca02153
commit
52e11b24bf
19 changed files with 1206 additions and 1109 deletions
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@ -6,107 +6,14 @@ package markdown
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import (
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"bytes"
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"fmt"
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"io"
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"net/url"
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"path"
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"path/filepath"
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"regexp"
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"strings"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/markup"
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"code.gitea.io/gitea/modules/setting"
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"github.com/Unknwon/com"
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"github.com/russross/blackfriday"
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"golang.org/x/net/html"
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)
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// Issue name styles
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const (
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IssueNameStyleNumeric = "numeric"
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IssueNameStyleAlphanumeric = "alphanumeric"
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)
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// IsMarkdownFile reports whether name looks like a Markdown file
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// based on its extension.
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func IsMarkdownFile(name string) bool {
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extension := strings.ToLower(filepath.Ext(name))
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for _, ext := range setting.Markdown.FileExtensions {
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if strings.ToLower(ext) == extension {
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return true
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}
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}
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return false
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}
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var (
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// NOTE: All below regex matching do not perform any extra validation.
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// Thus a link is produced even if the user does not exist, the issue does not exist, the commit does not exist, etc.
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// While fast, this is also incorrect and lead to false positives.
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// MentionPattern matches string that mentions someone, e.g. @Unknwon
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MentionPattern = regexp.MustCompile(`(\s|^|\W)@[0-9a-zA-Z-_\.]+`)
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// IssueNumericPattern matches string that references to a numeric issue, e.g. #1287
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IssueNumericPattern = regexp.MustCompile(`( |^|\()#[0-9]+\b`)
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// IssueAlphanumericPattern matches string that references to an alphanumeric issue, e.g. ABC-1234
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IssueAlphanumericPattern = regexp.MustCompile(`( |^|\()[A-Z]{1,10}-[1-9][0-9]*\b`)
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// CrossReferenceIssueNumericPattern matches string that references a numeric issue in a different repository
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// e.g. gogits/gogs#12345
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CrossReferenceIssueNumericPattern = regexp.MustCompile(`( |^)[0-9a-zA-Z]+/[0-9a-zA-Z]+#[0-9]+\b`)
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// Sha1CurrentPattern matches string that represents a commit SHA, e.g. d8a994ef243349f321568f9e36d5c3f444b99cae
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// Although SHA1 hashes are 40 chars long, the regex matches the hash from 7 to 40 chars in length
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// so that abbreviated hash links can be used as well. This matches git and github useability.
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Sha1CurrentPattern = regexp.MustCompile(`(?:^|\s|\()([0-9a-f]{7,40})\b`)
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// ShortLinkPattern matches short but difficult to parse [[name|link|arg=test]] syntax
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ShortLinkPattern = regexp.MustCompile(`(\[\[.*?\]\]\w*)`)
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// AnySHA1Pattern allows to split url containing SHA into parts
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AnySHA1Pattern = regexp.MustCompile(`(http\S*)://(\S+)/(\S+)/(\S+)/(\S+)/([0-9a-f]{40})(?:/?([^#\s]+)?(?:#(\S+))?)?`)
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validLinksPattern = regexp.MustCompile(`^[a-z][\w-]+://`)
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)
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// regexp for full links to issues/pulls
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var issueFullPattern *regexp.Regexp
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// InitMarkdown initialize regexps for markdown parsing
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func InitMarkdown() {
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getIssueFullPattern()
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}
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func getIssueFullPattern() *regexp.Regexp {
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if issueFullPattern == nil {
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appURL := setting.AppURL
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if len(appURL) > 0 && appURL[len(appURL)-1] != '/' {
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appURL += "/"
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}
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issueFullPattern = regexp.MustCompile(appURL +
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`\w+/\w+/(?:issues|pulls)/((?:\w{1,10}-)?[1-9][0-9]*)([\?|#]\S+.(\S+)?)?\b`)
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}
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return issueFullPattern
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}
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// isLink reports whether link fits valid format.
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func isLink(link []byte) bool {
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return validLinksPattern.Match(link)
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}
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// FindAllMentions matches mention patterns in given content
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// and returns a list of found user names without @ prefix.
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func FindAllMentions(content string) []string {
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mentions := MentionPattern.FindAllString(content, -1)
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for i := range mentions {
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mentions[i] = mentions[i][strings.Index(mentions[i], "@")+1:] // Strip @ character
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}
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return mentions
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}
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// Renderer is a extended version of underlying render object.
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type Renderer struct {
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blackfriday.Renderer
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@ -116,13 +23,13 @@ type Renderer struct {
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// Link defines how formal links should be processed to produce corresponding HTML elements.
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func (r *Renderer) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
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if len(link) > 0 && !isLink(link) {
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if len(link) > 0 && !markup.IsLink(link) {
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if link[0] != '#' {
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lnk := string(link)
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if r.isWikiMarkdown {
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lnk = URLJoin("wiki", lnk)
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lnk = markup.URLJoin("wiki", lnk)
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}
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mLink := URLJoin(r.urlPrefix, lnk)
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mLink := markup.URLJoin(r.urlPrefix, lnk)
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link = []byte(mLink)
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}
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}
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@ -190,11 +97,11 @@ var (
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func (r *Renderer) Image(out *bytes.Buffer, link []byte, title []byte, alt []byte) {
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prefix := r.urlPrefix
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if r.isWikiMarkdown {
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prefix = URLJoin(prefix, "wiki", "src")
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prefix = markup.URLJoin(prefix, "wiki", "src")
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}
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prefix = strings.Replace(prefix, "/src/", "/raw/", 1)
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if len(link) > 0 {
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if isLink(link) {
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if markup.IsLink(link) {
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// External link with .svg suffix usually means CI status.
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// TODO: define a keyword to allow non-svg images render as external link.
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if bytes.HasSuffix(link, svgSuffix) || bytes.Contains(link, svgSuffixWithMark) {
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@ -203,7 +110,7 @@ func (r *Renderer) Image(out *bytes.Buffer, link []byte, title []byte, alt []byt
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}
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} else {
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lnk := string(link)
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lnk = URLJoin(prefix, lnk)
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lnk = markup.URLJoin(prefix, lnk)
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lnk = strings.Replace(lnk, " ", "+", -1)
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link = []byte(lnk)
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}
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@ -216,351 +123,6 @@ func (r *Renderer) Image(out *bytes.Buffer, link []byte, title []byte, alt []byt
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out.WriteString("</a>")
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}
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// cutoutVerbosePrefix cutouts URL prefix including sub-path to
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// return a clean unified string of request URL path.
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func cutoutVerbosePrefix(prefix string) string {
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if len(prefix) == 0 || prefix[0] != '/' {
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return prefix
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}
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count := 0
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for i := 0; i < len(prefix); i++ {
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if prefix[i] == '/' {
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count++
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}
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if count >= 3+setting.AppSubURLDepth {
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return prefix[:i]
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}
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}
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return prefix
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}
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// URLJoin joins url components, like path.Join, but preserving contents
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func URLJoin(base string, elems ...string) string {
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u, err := url.Parse(base)
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if err != nil {
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log.Error(4, "URLJoin: Invalid base URL %s", base)
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return ""
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}
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joinArgs := make([]string, 0, len(elems)+1)
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joinArgs = append(joinArgs, u.Path)
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joinArgs = append(joinArgs, elems...)
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u.Path = path.Join(joinArgs...)
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return u.String()
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}
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// RenderIssueIndexPattern renders issue indexes to corresponding links.
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func RenderIssueIndexPattern(rawBytes []byte, urlPrefix string, metas map[string]string) []byte {
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urlPrefix = cutoutVerbosePrefix(urlPrefix)
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pattern := IssueNumericPattern
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if metas["style"] == IssueNameStyleAlphanumeric {
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pattern = IssueAlphanumericPattern
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}
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ms := pattern.FindAll(rawBytes, -1)
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for _, m := range ms {
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if m[0] == ' ' || m[0] == '(' {
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m = m[1:] // ignore leading space or opening parentheses
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}
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var link string
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if metas == nil {
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link = fmt.Sprintf(`<a href="%s">%s</a>`, URLJoin(urlPrefix, "issues", string(m[1:])), m)
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} else {
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// Support for external issue tracker
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if metas["style"] == IssueNameStyleAlphanumeric {
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metas["index"] = string(m)
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} else {
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metas["index"] = string(m[1:])
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}
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link = fmt.Sprintf(`<a href="%s">%s</a>`, com.Expand(metas["format"], metas), m)
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}
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rawBytes = bytes.Replace(rawBytes, m, []byte(link), 1)
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}
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return rawBytes
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}
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// IsSameDomain checks if given url string has the same hostname as current Gitea instance
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func IsSameDomain(s string) bool {
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if strings.HasPrefix(s, "/") {
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return true
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}
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if uapp, err := url.Parse(setting.AppURL); err == nil {
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if u, err := url.Parse(s); err == nil {
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return u.Host == uapp.Host
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}
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return false
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}
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return false
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}
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// renderFullSha1Pattern renders SHA containing URLs
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func renderFullSha1Pattern(rawBytes []byte, urlPrefix string) []byte {
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ms := AnySHA1Pattern.FindAllSubmatch(rawBytes, -1)
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for _, m := range ms {
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all := m[0]
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protocol := string(m[1])
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paths := string(m[2])
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path := protocol + "://" + paths
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author := string(m[3])
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repoName := string(m[4])
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path = URLJoin(path, author, repoName)
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ltype := "src"
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itemType := m[5]
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if IsSameDomain(paths) {
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ltype = string(itemType)
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} else if string(itemType) == "commit" {
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ltype = "commit"
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}
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sha := m[6]
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var subtree string
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if len(m) > 7 && len(m[7]) > 0 {
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subtree = string(m[7])
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}
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var line []byte
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if len(m) > 8 && len(m[8]) > 0 {
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line = m[8]
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}
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urlSuffix := ""
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text := base.ShortSha(string(sha))
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if subtree != "" {
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urlSuffix = "/" + subtree
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text += urlSuffix
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}
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if line != nil {
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value := string(line)
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urlSuffix += "#"
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urlSuffix += value
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text += " ("
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text += value
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text += ")"
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}
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rawBytes = bytes.Replace(rawBytes, all, []byte(fmt.Sprintf(
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`<a href="%s">%s</a>`, URLJoin(path, ltype, string(sha))+urlSuffix, text)), -1)
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}
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return rawBytes
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}
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// RenderFullIssuePattern renders issues-like URLs
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func RenderFullIssuePattern(rawBytes []byte) []byte {
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ms := getIssueFullPattern().FindAllSubmatch(rawBytes, -1)
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for _, m := range ms {
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all := m[0]
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id := string(m[1])
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text := "#" + id
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// TODO if m[2] is not nil, then link is to a comment,
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// and we should indicate that in the text somehow
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rawBytes = bytes.Replace(rawBytes, all, []byte(fmt.Sprintf(
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`<a href="%s">%s</a>`, string(all), text)), -1)
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}
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return rawBytes
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}
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func firstIndexOfByte(sl []byte, target byte) int {
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for i := 0; i < len(sl); i++ {
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if sl[i] == target {
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return i
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}
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}
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return -1
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}
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func lastIndexOfByte(sl []byte, target byte) int {
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for i := len(sl) - 1; i >= 0; i-- {
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if sl[i] == target {
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return i
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}
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}
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return -1
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}
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// RenderShortLinks processes [[syntax]]
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//
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// noLink flag disables making link tags when set to true
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// so this function just replaces the whole [[...]] with the content text
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//
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// isWikiMarkdown is a flag to choose linking url prefix
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func RenderShortLinks(rawBytes []byte, urlPrefix string, noLink bool, isWikiMarkdown bool) []byte {
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ms := ShortLinkPattern.FindAll(rawBytes, -1)
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for _, m := range ms {
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orig := bytes.TrimSpace(m)
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m = orig[2:]
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tailPos := lastIndexOfByte(m, ']') + 1
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tail := []byte{}
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if tailPos < len(m) {
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tail = m[tailPos:]
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m = m[:tailPos-1]
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}
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m = m[:len(m)-2]
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props := map[string]string{}
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// MediaWiki uses [[link|text]], while GitHub uses [[text|link]]
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// It makes page handling terrible, but we prefer GitHub syntax
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// And fall back to MediaWiki only when it is obvious from the look
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// Of text and link contents
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sl := bytes.Split(m, []byte("|"))
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for _, v := range sl {
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switch bytes.Count(v, []byte("=")) {
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// Piped args without = sign, these are mandatory arguments
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case 0:
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{
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sv := string(v)
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if props["name"] == "" {
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if isLink(v) {
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// If we clearly see it is a link, we save it so
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// But first we need to ensure, that if both mandatory args provided
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// look like links, we stick to GitHub syntax
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if props["link"] != "" {
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props["name"] = props["link"]
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}
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props["link"] = strings.TrimSpace(sv)
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} else {
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props["name"] = sv
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}
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} else {
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props["link"] = strings.TrimSpace(sv)
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}
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}
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// Piped args with = sign, these are optional arguments
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case 1:
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{
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sep := firstIndexOfByte(v, '=')
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key, val := string(v[:sep]), html.UnescapeString(string(v[sep+1:]))
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lastCharIndex := len(val) - 1
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if (val[0] == '"' || val[0] == '\'') && (val[lastCharIndex] == '"' || val[lastCharIndex] == '\'') {
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val = val[1:lastCharIndex]
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}
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props[key] = val
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}
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}
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}
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var name string
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var link string
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if props["link"] != "" {
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link = props["link"]
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} else if props["name"] != "" {
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link = props["name"]
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}
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if props["title"] != "" {
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name = props["title"]
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} else if props["name"] != "" {
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name = props["name"]
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} else {
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name = link
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}
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name += string(tail)
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image := false
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ext := filepath.Ext(string(link))
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if ext != "" {
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switch ext {
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case ".jpg", ".jpeg", ".png", ".tif", ".tiff", ".webp", ".gif", ".bmp", ".ico", ".svg":
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{
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image = true
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}
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}
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}
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absoluteLink := isLink([]byte(link))
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if !absoluteLink {
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link = strings.Replace(link, " ", "+", -1)
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}
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if image {
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if !absoluteLink {
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if IsSameDomain(urlPrefix) {
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urlPrefix = strings.Replace(urlPrefix, "/src/", "/raw/", 1)
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}
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if isWikiMarkdown {
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link = URLJoin("wiki", "raw", link)
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}
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link = URLJoin(urlPrefix, link)
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}
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title := props["title"]
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if title == "" {
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title = props["alt"]
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}
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if title == "" {
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title = path.Base(string(name))
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}
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alt := props["alt"]
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if alt == "" {
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alt = name
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}
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if alt != "" {
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alt = `alt="` + alt + `"`
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}
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name = fmt.Sprintf(`<img src="%s" %s title="%s" />`, link, alt, title)
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} else if !absoluteLink {
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if isWikiMarkdown {
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link = URLJoin("wiki", link)
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}
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link = URLJoin(urlPrefix, link)
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}
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if noLink {
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rawBytes = bytes.Replace(rawBytes, orig, []byte(name), -1)
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} else {
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rawBytes = bytes.Replace(rawBytes, orig,
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[]byte(fmt.Sprintf(`<a href="%s">%s</a>`, link, name)), -1)
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}
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}
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return rawBytes
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}
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// RenderCrossReferenceIssueIndexPattern renders issue indexes from other repositories to corresponding links.
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func RenderCrossReferenceIssueIndexPattern(rawBytes []byte, urlPrefix string, metas map[string]string) []byte {
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ms := CrossReferenceIssueNumericPattern.FindAll(rawBytes, -1)
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for _, m := range ms {
|
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if m[0] == ' ' || m[0] == '(' {
|
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m = m[1:] // ignore leading space or opening parentheses
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}
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repo := string(bytes.Split(m, []byte("#"))[0])
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issue := string(bytes.Split(m, []byte("#"))[1])
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link := fmt.Sprintf(`<a href="%s">%s</a>`, URLJoin(setting.AppURL, repo, "issues", issue), m)
|
||||
rawBytes = bytes.Replace(rawBytes, m, []byte(link), 1)
|
||||
}
|
||||
return rawBytes
|
||||
}
|
||||
|
||||
// renderSha1CurrentPattern renders SHA1 strings to corresponding links that assumes in the same repository.
|
||||
func renderSha1CurrentPattern(rawBytes []byte, urlPrefix string) []byte {
|
||||
ms := Sha1CurrentPattern.FindAllSubmatch(rawBytes, -1)
|
||||
for _, m := range ms {
|
||||
hash := m[1]
|
||||
// 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.
|
||||
rawBytes = bytes.Replace(rawBytes, hash, []byte(fmt.Sprintf(
|
||||
`<a href="%s">%s</a>`, URLJoin(urlPrefix, "commit", string(hash)), base.ShortSha(string(hash)))), -1)
|
||||
}
|
||||
return rawBytes
|
||||
}
|
||||
|
||||
// RenderSpecialLink renders mentions, indexes and SHA1 strings to corresponding links.
|
||||
func RenderSpecialLink(rawBytes []byte, urlPrefix string, metas map[string]string, isWikiMarkdown bool) []byte {
|
||||
ms := MentionPattern.FindAll(rawBytes, -1)
|
||||
for _, m := range ms {
|
||||
m = m[bytes.Index(m, []byte("@")):]
|
||||
rawBytes = bytes.Replace(rawBytes, m,
|
||||
[]byte(fmt.Sprintf(`<a href="%s">%s</a>`, URLJoin(setting.AppURL, string(m[1:])), m)), -1)
|
||||
}
|
||||
|
||||
rawBytes = RenderFullIssuePattern(rawBytes)
|
||||
rawBytes = RenderShortLinks(rawBytes, urlPrefix, false, isWikiMarkdown)
|
||||
rawBytes = RenderIssueIndexPattern(rawBytes, urlPrefix, metas)
|
||||
rawBytes = RenderCrossReferenceIssueIndexPattern(rawBytes, urlPrefix, metas)
|
||||
rawBytes = renderFullSha1Pattern(rawBytes, urlPrefix)
|
||||
rawBytes = renderSha1CurrentPattern(rawBytes, urlPrefix)
|
||||
return rawBytes
|
||||
}
|
||||
|
||||
// RenderRaw renders Markdown to HTML without handling special links.
|
||||
func RenderRaw(body []byte, urlPrefix string, wikiMarkdown bool) []byte {
|
||||
htmlFlags := 0
|
||||
|
|
@ -588,107 +150,6 @@ func RenderRaw(body []byte, urlPrefix string, wikiMarkdown bool) []byte {
|
|||
return body
|
||||
}
|
||||
|
||||
var (
|
||||
leftAngleBracket = []byte("</")
|
||||
rightAngleBracket = []byte(">")
|
||||
)
|
||||
|
||||
var noEndTags = []string{"img", "input", "br", "hr"}
|
||||
|
||||
// PostProcess treats different types of HTML differently,
|
||||
// and only renders special links for plain text blocks.
|
||||
func PostProcess(rawHTML []byte, urlPrefix string, metas map[string]string, isWikiMarkdown bool) []byte {
|
||||
startTags := make([]string, 0, 5)
|
||||
var buf bytes.Buffer
|
||||
tokenizer := html.NewTokenizer(bytes.NewReader(rawHTML))
|
||||
|
||||
OUTER_LOOP:
|
||||
for html.ErrorToken != tokenizer.Next() {
|
||||
token := tokenizer.Token()
|
||||
switch token.Type {
|
||||
case html.TextToken:
|
||||
buf.Write(RenderSpecialLink([]byte(token.String()), urlPrefix, metas, isWikiMarkdown))
|
||||
|
||||
case html.StartTagToken:
|
||||
buf.WriteString(token.String())
|
||||
tagName := token.Data
|
||||
// If this is an excluded tag, we skip processing all output until a close tag is encountered.
|
||||
if strings.EqualFold("a", tagName) || strings.EqualFold("code", tagName) || strings.EqualFold("pre", tagName) {
|
||||
stackNum := 1
|
||||
for html.ErrorToken != tokenizer.Next() {
|
||||
token = tokenizer.Token()
|
||||
|
||||
// Copy the token to the output verbatim
|
||||
buf.Write(RenderShortLinks([]byte(token.String()), urlPrefix, true, isWikiMarkdown))
|
||||
|
||||
if token.Type == html.StartTagToken && !com.IsSliceContainsStr(noEndTags, token.Data) {
|
||||
stackNum++
|
||||
}
|
||||
|
||||
// If this is the close tag to the outer-most, we are done
|
||||
if token.Type == html.EndTagToken {
|
||||
stackNum--
|
||||
|
||||
if stackNum <= 0 && strings.EqualFold(tagName, token.Data) {
|
||||
break
|
||||
}
|
||||
}
|
||||
}
|
||||
continue OUTER_LOOP
|
||||
}
|
||||
|
||||
if !com.IsSliceContainsStr(noEndTags, tagName) {
|
||||
startTags = append(startTags, tagName)
|
||||
}
|
||||
|
||||
case html.EndTagToken:
|
||||
if len(startTags) == 0 {
|
||||
buf.WriteString(token.String())
|
||||
break
|
||||
}
|
||||
|
||||
buf.Write(leftAngleBracket)
|
||||
buf.WriteString(startTags[len(startTags)-1])
|
||||
buf.Write(rightAngleBracket)
|
||||
startTags = startTags[:len(startTags)-1]
|
||||
default:
|
||||
buf.WriteString(token.String())
|
||||
}
|
||||
}
|
||||
|
||||
if io.EOF == tokenizer.Err() {
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
// If we are not at the end of the input, then some other parsing error has occurred,
|
||||
// so return the input verbatim.
|
||||
return rawHTML
|
||||
}
|
||||
|
||||
// Render renders Markdown to HTML with all specific handling stuff.
|
||||
func render(rawBytes []byte, urlPrefix string, metas map[string]string, isWikiMarkdown bool) []byte {
|
||||
urlPrefix = strings.Replace(urlPrefix, " ", "+", -1)
|
||||
result := RenderRaw(rawBytes, urlPrefix, isWikiMarkdown)
|
||||
result = PostProcess(result, urlPrefix, metas, isWikiMarkdown)
|
||||
result = SanitizeBytes(result)
|
||||
return result
|
||||
}
|
||||
|
||||
// Render renders Markdown to HTML with all specific handling stuff.
|
||||
func Render(rawBytes []byte, urlPrefix string, metas map[string]string) []byte {
|
||||
return render(rawBytes, urlPrefix, metas, false)
|
||||
}
|
||||
|
||||
// RenderString renders Markdown to HTML with special links and returns string type.
|
||||
func RenderString(raw, urlPrefix string, metas map[string]string) string {
|
||||
return string(render([]byte(raw), urlPrefix, metas, false))
|
||||
}
|
||||
|
||||
// RenderWiki renders markdown wiki page to HTML and return HTML string
|
||||
func RenderWiki(rawBytes []byte, urlPrefix string, metas map[string]string) string {
|
||||
return string(render(rawBytes, urlPrefix, metas, true))
|
||||
}
|
||||
|
||||
var (
|
||||
// MarkupName describes markup's name
|
||||
MarkupName = "markdown"
|
||||
|
|
@ -714,5 +175,26 @@ func (Parser) Extensions() []string {
|
|||
|
||||
// Render implements markup.Parser
|
||||
func (Parser) Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte {
|
||||
return render(rawBytes, urlPrefix, metas, isWiki)
|
||||
return RenderRaw(rawBytes, urlPrefix, isWiki)
|
||||
}
|
||||
|
||||
// Render renders Markdown to HTML with all specific handling stuff.
|
||||
func Render(rawBytes []byte, urlPrefix string, metas map[string]string) []byte {
|
||||
return markup.Render("a.md", rawBytes, urlPrefix, metas)
|
||||
}
|
||||
|
||||
// RenderString renders Markdown to HTML with special links and returns string type.
|
||||
func RenderString(raw, urlPrefix string, metas map[string]string) string {
|
||||
return markup.RenderString("a.md", raw, urlPrefix, metas)
|
||||
}
|
||||
|
||||
// RenderWiki renders markdown wiki page to HTML and return HTML string
|
||||
func RenderWiki(rawBytes []byte, urlPrefix string, metas map[string]string) string {
|
||||
return markup.RenderWiki("a.md", rawBytes, urlPrefix, metas)
|
||||
}
|
||||
|
||||
// IsMarkdownFile reports whether name looks like a Markdown file
|
||||
// based on its extension.
|
||||
func IsMarkdownFile(name string) bool {
|
||||
return markup.IsMarkupFile(name, MarkupName)
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue