mirror of
https://github.com/go-gitea/gitea
synced 2024-08-18 13:20:51 +02:00
* Get rid of autolink * autolink in markdown * Replace email addresses with mailto links * better handling of links * Remove autolink.js from footer * Refactor entire html.go * fix some bugs * Make tests green, move what we can to html_internal_test, various other changes to processor logic * Make markdown tests work again This is just a description to allow me to force push in order to restart the drone build. * Fix failing markdown tests in routers/api/v1/misc * Add license headers, log errors, future-proof <body> * fix formatting
664 lines
19 KiB
Go
664 lines
19 KiB
Go
// Copyright 2017 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 markup
|
||
|
||
import (
|
||
"bytes"
|
||
"net/url"
|
||
"path"
|
||
"path/filepath"
|
||
"regexp"
|
||
"strings"
|
||
|
||
"code.gitea.io/gitea/modules/base"
|
||
"code.gitea.io/gitea/modules/setting"
|
||
"code.gitea.io/gitea/modules/util"
|
||
|
||
"github.com/Unknwon/com"
|
||
"golang.org/x/net/html"
|
||
"golang.org/x/net/html/atom"
|
||
)
|
||
|
||
// Issue name styles
|
||
const (
|
||
IssueNameStyleNumeric = "numeric"
|
||
IssueNameStyleAlphanumeric = "alphanumeric"
|
||
)
|
||
|
||
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
|
||
|
||
// mentionPattern matches all mentions in the form of "@user"
|
||
mentionPattern = regexp.MustCompile(`(?:\s|^|\W)(@[0-9a-zA-Z-_\.]+)`)
|
||
|
||
// issueNumericPattern matches string that references to a numeric issue, e.g. #1287
|
||
issueNumericPattern = regexp.MustCompile(`(?:\s|^|\W)(#[0-9]+)\b`)
|
||
// issueAlphanumericPattern matches string that references to an alphanumeric issue, e.g. ABC-1234
|
||
issueAlphanumericPattern = regexp.MustCompile(`(?:\s|^|\W)([A-Z]{1,10}-[1-9][0-9]*)\b`)
|
||
// crossReferenceIssueNumericPattern matches string that references a numeric issue in a different repository
|
||
// e.g. gogits/gogs#12345
|
||
crossReferenceIssueNumericPattern = regexp.MustCompile(`(?:\s|^|\W)([0-9a-zA-Z-_\.]+/[0-9a-zA-Z-_\.]+#[0-9]+)\b`)
|
||
|
||
// 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 useability.
|
||
sha1CurrentPattern = regexp.MustCompile(`(?:\s|^|\W)([0-9a-f]{7,40})\b`)
|
||
|
||
// shortLinkPattern matches short but difficult to parse [[name|link|arg=test]] syntax
|
||
shortLinkPattern = regexp.MustCompile(`\[\[(.*?)\]\](\w*)`)
|
||
|
||
// anySHA1Pattern allows to split url containing SHA into parts
|
||
anySHA1Pattern = regexp.MustCompile(`https?://(?:\S+/){4}([0-9a-f]{40})/?([^#\s]+)?(?:#(\S+))?`)
|
||
|
||
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("[a-zA-Z0-9.!#$%&'*+\\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*")
|
||
|
||
// matches http/https links. used for autlinking those. partly modified from
|
||
// the original present in autolink.js
|
||
linkRegex = regexp.MustCompile(`(?:(?:http|https):\/\/(?:[\-;:&=\+\$,\w]+@)?[A-Za-z0-9\.\-]+|(?:www\.|[\-;:&=\+\$,\w]+@)[A-Za-z0-9\.\-]+)(?:(?:\/[\+~%\/\.\w\-]*)?\??(?:[\-\+:=&;%@\.\w]*)#?(?:[\.\!\/\\\w]*))?`)
|
||
)
|
||
|
||
// regexp for full links to issues/pulls
|
||
var issueFullPattern *regexp.Regexp
|
||
|
||
// 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)
|
||
}
|
||
|
||
func getIssueFullPattern() *regexp.Regexp {
|
||
if issueFullPattern == nil {
|
||
appURL := setting.AppURL
|
||
if len(appURL) > 0 && appURL[len(appURL)-1] != '/' {
|
||
appURL += "/"
|
||
}
|
||
issueFullPattern = regexp.MustCompile(appURL +
|
||
`\w+/\w+/(?:issues|pulls)/((?:\w{1,10}-)?[1-9][0-9]*)([\?|#]\S+.(\S+)?)?\b`)
|
||
}
|
||
return issueFullPattern
|
||
}
|
||
|
||
// FindAllMentions matches mention patterns in given content
|
||
// and returns a list of found user names without @ prefix.
|
||
func FindAllMentions(content string) []string {
|
||
mentions := mentionPattern.FindAllStringSubmatch(content, -1)
|
||
ret := make([]string, len(mentions))
|
||
for i, val := range mentions {
|
||
ret[i] = val[1][1:]
|
||
}
|
||
return ret
|
||
}
|
||
|
||
// cutoutVerbosePrefix cutouts URL prefix including sub-path to
|
||
// return a clean unified string of request URL path.
|
||
func cutoutVerbosePrefix(prefix string) string {
|
||
if len(prefix) == 0 || prefix[0] != '/' {
|
||
return prefix
|
||
}
|
||
count := 0
|
||
for i := 0; i < len(prefix); i++ {
|
||
if prefix[i] == '/' {
|
||
count++
|
||
}
|
||
if count >= 3+setting.AppSubURLDepth {
|
||
return prefix[:i]
|
||
}
|
||
}
|
||
return prefix
|
||
}
|
||
|
||
// 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.Error()
|
||
}
|
||
|
||
type processor func(ctx *postProcessCtx, node *html.Node)
|
||
|
||
var defaultProcessors = []processor{
|
||
mentionProcessor,
|
||
shortLinkProcessor,
|
||
fullIssuePatternProcessor,
|
||
issueIndexPatternProcessor,
|
||
crossReferenceIssueIndexPatternProcessor,
|
||
fullSha1PatternProcessor,
|
||
sha1CurrentPatternProcessor,
|
||
emailAddressProcessor,
|
||
linkProcessor,
|
||
}
|
||
|
||
type postProcessCtx struct {
|
||
metas map[string]string
|
||
urlPrefix string
|
||
isWikiMarkdown bool
|
||
|
||
// processors used by this context.
|
||
procs []processor
|
||
|
||
// if set to true, when an <a> is found, instead of just returning during
|
||
// visitNode, it will recursively visit the node exclusively running
|
||
// shortLinkProcessorFull with true.
|
||
visitLinksForShortLinks bool
|
||
}
|
||
|
||
// 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(
|
||
rawHTML []byte,
|
||
urlPrefix string,
|
||
metas map[string]string,
|
||
isWikiMarkdown bool,
|
||
) ([]byte, error) {
|
||
// create the context from the parameters
|
||
ctx := &postProcessCtx{
|
||
metas: metas,
|
||
urlPrefix: urlPrefix,
|
||
isWikiMarkdown: isWikiMarkdown,
|
||
procs: defaultProcessors,
|
||
visitLinksForShortLinks: true,
|
||
}
|
||
return ctx.postProcess(rawHTML)
|
||
}
|
||
|
||
var commitMessageProcessors = []processor{
|
||
mentionProcessor,
|
||
fullIssuePatternProcessor,
|
||
issueIndexPatternProcessor,
|
||
crossReferenceIssueIndexPatternProcessor,
|
||
fullSha1PatternProcessor,
|
||
sha1CurrentPatternProcessor,
|
||
emailAddressProcessor,
|
||
linkProcessor,
|
||
}
|
||
|
||
// 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(
|
||
rawHTML []byte,
|
||
urlPrefix, defaultLink string,
|
||
metas map[string]string,
|
||
) ([]byte, error) {
|
||
ctx := &postProcessCtx{
|
||
metas: metas,
|
||
urlPrefix: urlPrefix,
|
||
procs: commitMessageProcessors,
|
||
}
|
||
if 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.
|
||
ctx.procs = append(ctx.procs, genDefaultLinkProcessor(defaultLink))
|
||
}
|
||
return ctx.postProcess(rawHTML)
|
||
}
|
||
|
||
var byteBodyTag = []byte("<body>")
|
||
var byteBodyTagClosing = []byte("</body>")
|
||
|
||
func (ctx *postProcessCtx) postProcess(rawHTML []byte) ([]byte, error) {
|
||
if ctx.procs == nil {
|
||
ctx.procs = defaultProcessors
|
||
}
|
||
|
||
// give a generous extra 50 bytes
|
||
res := make([]byte, 0, len(rawHTML)+50)
|
||
res = append(res, byteBodyTag...)
|
||
res = append(res, rawHTML...)
|
||
res = append(res, byteBodyTagClosing...)
|
||
|
||
// parse the HTML
|
||
nodes, err := html.ParseFragment(bytes.NewReader(res), nil)
|
||
if err != nil {
|
||
return nil, &postProcessError{"invalid HTML", err}
|
||
}
|
||
|
||
for _, node := range nodes {
|
||
ctx.visitNode(node)
|
||
}
|
||
|
||
// Create buffer in which the data will be placed again. We know that the
|
||
// length will be at least that of res; to spare a few alloc+copy, we
|
||
// reuse res, resetting its length to 0.
|
||
buf := bytes.NewBuffer(res[:0])
|
||
// Render everything to buf.
|
||
for _, node := range nodes {
|
||
err = html.Render(buf, node)
|
||
if err != nil {
|
||
return nil, &postProcessError{"error rendering processed HTML", err}
|
||
}
|
||
}
|
||
|
||
// remove initial parts - because Render creates a whole HTML page.
|
||
res = buf.Bytes()
|
||
res = res[bytes.Index(res, byteBodyTag)+len(byteBodyTag) : bytes.LastIndex(res, byteBodyTagClosing)]
|
||
|
||
// Everything done successfully, return parsed data.
|
||
return res, nil
|
||
}
|
||
|
||
func (ctx *postProcessCtx) visitNode(node *html.Node) {
|
||
// We ignore code, pre and already generated links.
|
||
switch node.Type {
|
||
case html.TextNode:
|
||
ctx.textNode(node)
|
||
case html.ElementNode:
|
||
if node.Data == "a" || node.Data == "code" || node.Data == "pre" {
|
||
if node.Data == "a" && ctx.visitLinksForShortLinks {
|
||
ctx.visitNodeForShortLinks(node)
|
||
}
|
||
return
|
||
}
|
||
for n := node.FirstChild; n != nil; n = n.NextSibling {
|
||
ctx.visitNode(n)
|
||
}
|
||
}
|
||
// ignore everything else
|
||
}
|
||
|
||
func (ctx *postProcessCtx) visitNodeForShortLinks(node *html.Node) {
|
||
switch node.Type {
|
||
case html.TextNode:
|
||
shortLinkProcessorFull(ctx, node, true)
|
||
case html.ElementNode:
|
||
if node.Data == "code" || node.Data == "pre" {
|
||
return
|
||
}
|
||
for n := node.FirstChild; n != nil; n = n.NextSibling {
|
||
ctx.visitNodeForShortLinks(n)
|
||
}
|
||
}
|
||
}
|
||
|
||
// textNode runs the passed node through various processors, in order to handle
|
||
// all kinds of special links handled by the post-processing.
|
||
func (ctx *postProcessCtx) textNode(node *html.Node) {
|
||
for _, processor := range ctx.procs {
|
||
processor(ctx, node)
|
||
}
|
||
}
|
||
|
||
func createLink(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},
|
||
},
|
||
}
|
||
textNode.Parent = linkNode
|
||
return linkNode
|
||
}
|
||
|
||
// replaceContent takes a text node, and in its content it replaces a section of
|
||
// it with the specified newNode. An example to visualize how this can work can
|
||
// be found here: https://play.golang.org/p/5zP8NnHZ03s
|
||
func replaceContent(node *html.Node, i, j int, newNode *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
|
||
node.Parent.InsertBefore(newNode, nextSibling)
|
||
if after != "" {
|
||
node.Parent.InsertBefore(&html.Node{
|
||
Type: html.TextNode,
|
||
Data: after,
|
||
}, nextSibling)
|
||
}
|
||
}
|
||
|
||
func mentionProcessor(_ *postProcessCtx, node *html.Node) {
|
||
m := mentionPattern.FindStringSubmatchIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
// Replace the mention with a link to the specified user.
|
||
mention := node.Data[m[2]:m[3]]
|
||
replaceContent(node, m[2], m[3], createLink(util.URLJoin(setting.AppURL, mention[1:]), mention))
|
||
}
|
||
|
||
func shortLinkProcessor(ctx *postProcessCtx, node *html.Node) {
|
||
shortLinkProcessorFull(ctx, node, false)
|
||
}
|
||
|
||
func shortLinkProcessorFull(ctx *postProcessCtx, node *html.Node, noLink bool) {
|
||
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 (strings.HasPrefix(val, "“") && strings.HasSuffix(val, "”")) ||
|
||
(strings.HasPrefix(val, "‘") && strings.HasSuffix(val, "’")) {
|
||
const lenQuote = len("‘")
|
||
val = val[lenQuote : 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(string(link)); ext {
|
||
// fast path: empty string, ignore
|
||
case "":
|
||
break
|
||
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 {
|
||
link = strings.Replace(link, " ", "+", -1)
|
||
}
|
||
urlPrefix := ctx.urlPrefix
|
||
if image {
|
||
if !absoluteLink {
|
||
if IsSameDomain(urlPrefix) {
|
||
urlPrefix = strings.Replace(urlPrefix, "/src/", "/raw/", 1)
|
||
}
|
||
if ctx.isWikiMarkdown {
|
||
link = util.URLJoin("wiki", "raw", link)
|
||
}
|
||
link = util.URLJoin(urlPrefix, link)
|
||
}
|
||
title := props["title"]
|
||
if title == "" {
|
||
title = props["alt"]
|
||
}
|
||
if title == "" {
|
||
title = path.Base(string(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.isWikiMarkdown {
|
||
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)
|
||
}
|
||
|
||
func fullIssuePatternProcessor(ctx *postProcessCtx, node *html.Node) {
|
||
m := getIssueFullPattern().FindStringSubmatchIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
link := node.Data[m[0]:m[1]]
|
||
id := "#" + node.Data[m[2]:m[3]]
|
||
// TODO if m[4]:m[5] is not nil, then link is to a comment,
|
||
// and we should indicate that in the text somehow
|
||
replaceContent(node, m[0], m[1], createLink(link, id))
|
||
}
|
||
|
||
func issueIndexPatternProcessor(ctx *postProcessCtx, node *html.Node) {
|
||
prefix := cutoutVerbosePrefix(ctx.urlPrefix)
|
||
|
||
// default to numeric pattern, unless alphanumeric is requested.
|
||
pattern := issueNumericPattern
|
||
if ctx.metas["style"] == IssueNameStyleAlphanumeric {
|
||
pattern = issueAlphanumericPattern
|
||
}
|
||
|
||
match := pattern.FindStringSubmatchIndex(node.Data)
|
||
if match == nil {
|
||
return
|
||
}
|
||
id := node.Data[match[2]:match[3]]
|
||
var link *html.Node
|
||
if ctx.metas == nil {
|
||
link = createLink(util.URLJoin(prefix, "issues", id[1:]), id)
|
||
} else {
|
||
// Support for external issue tracker
|
||
if ctx.metas["style"] == IssueNameStyleAlphanumeric {
|
||
ctx.metas["index"] = id
|
||
} else {
|
||
ctx.metas["index"] = id[1:]
|
||
}
|
||
link = createLink(com.Expand(ctx.metas["format"], ctx.metas), id)
|
||
}
|
||
replaceContent(node, match[2], match[3], link)
|
||
}
|
||
|
||
func crossReferenceIssueIndexPatternProcessor(ctx *postProcessCtx, node *html.Node) {
|
||
m := crossReferenceIssueNumericPattern.FindStringSubmatchIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
ref := node.Data[m[2]:m[3]]
|
||
|
||
parts := strings.SplitN(ref, "#", 2)
|
||
repo, issue := parts[0], parts[1]
|
||
|
||
replaceContent(node, m[2], m[3],
|
||
createLink(util.URLJoin(setting.AppURL, repo, "issues", issue), ref))
|
||
}
|
||
|
||
// fullSha1PatternProcessor renders SHA containing URLs
|
||
func fullSha1PatternProcessor(ctx *postProcessCtx, node *html.Node) {
|
||
m := anySHA1Pattern.FindStringSubmatchIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
// take out what's relevant
|
||
urlFull := node.Data[m[0]:m[1]]
|
||
hash := node.Data[m[2]:m[3]]
|
||
|
||
var subtree, line string
|
||
|
||
// optional, we do them depending on the length.
|
||
if m[7] > 0 {
|
||
line = node.Data[m[6]:m[7]]
|
||
}
|
||
if m[5] > 0 {
|
||
subtree = node.Data[m[4]:m[5]]
|
||
}
|
||
|
||
text := base.ShortSha(hash)
|
||
if subtree != "" {
|
||
text += "/" + subtree
|
||
}
|
||
if line != "" {
|
||
text += " ("
|
||
text += line
|
||
text += ")"
|
||
}
|
||
|
||
replaceContent(node, m[0], m[1], createLink(urlFull, text))
|
||
}
|
||
|
||
// sha1CurrentPatternProcessor renders SHA1 strings to corresponding links that
|
||
// are assumed to be in the same repository.
|
||
func sha1CurrentPatternProcessor(ctx *postProcessCtx, node *html.Node) {
|
||
m := sha1CurrentPattern.FindStringSubmatchIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
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.
|
||
replaceContent(node, m[2], m[3],
|
||
createLink(util.URLJoin(ctx.urlPrefix, "commit", hash), base.ShortSha(hash)))
|
||
}
|
||
|
||
// emailAddressProcessor replaces raw email addresses with a mailto: link.
|
||
func emailAddressProcessor(ctx *postProcessCtx, node *html.Node) {
|
||
m := emailRegex.FindStringIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
mail := node.Data[m[0]:m[1]]
|
||
replaceContent(node, m[0], m[1], createLink("mailto:"+mail, mail))
|
||
}
|
||
|
||
// linkProcessor creates links for any HTTP or HTTPS URL not captured by
|
||
// markdown.
|
||
func linkProcessor(ctx *postProcessCtx, node *html.Node) {
|
||
m := linkRegex.FindStringIndex(node.Data)
|
||
if m == nil {
|
||
return
|
||
}
|
||
uri := node.Data[m[0]:m[1]]
|
||
replaceContent(node, m[0], m[1], createLink(uri, uri))
|
||
}
|
||
|
||
func genDefaultLinkProcessor(defaultLink string) processor {
|
||
return func(ctx *postProcessCtx, 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}}
|
||
node.FirstChild, node.LastChild = ch, ch
|
||
}
|
||
}
|