mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-05 13:52:52 +01:00
87f70979cf
- Currently the post processing will transform all issue indexes (such as `#6`) into a clickable link. - This makes sense in an situation like issues or PRs, where referencing to other issues is quite common and only referencing their issue index is an handy and efficient way to do it. - Currently this is also run for documents (which is the user profile and viewing rendered files), but in those situations it's less common to reference issues by their index and instead could mean something else. - This patch disables this post processing for issue index for documents. Matches Github's behavior. - Added unit tests. - Resolves https://codeberg.org/Codeberg/Community/issues/1120 Co-authored-by: Gusted <postmaster@gusted.xyz>
1280 lines
36 KiB
Go
1280 lines
36 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package markup
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import (
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"bytes"
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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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"sync"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/emoji"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/markup/common"
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"code.gitea.io/gitea/modules/references"
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"code.gitea.io/gitea/modules/regexplru"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/templates/vars"
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"code.gitea.io/gitea/modules/translation"
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"code.gitea.io/gitea/modules/util"
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"golang.org/x/net/html"
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"golang.org/x/net/html/atom"
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"mvdan.cc/xurls/v2"
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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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IssueNameStyleRegexp = "regexp"
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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 linked entity does not exist.
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// While fast, this is also incorrect and lead to false positives.
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// TODO: fix invalid linking issue
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// valid chars in encoded path and parameter: [-+~_%.a-zA-Z0-9/]
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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 usability.
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sha1CurrentPattern = regexp.MustCompile(`(?:\s|^|\(|\[)([0-9a-f]{7,40})(?:\s|$|\)|\]|[.,](\s|$))`)
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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 splits url containing SHA into parts
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anySHA1Pattern = regexp.MustCompile(`https?://(?:\S+/){4,5}([0-9a-f]{40})(/[-+~_%.a-zA-Z0-9/]+)?(#[-+~_%.a-zA-Z0-9]+)?`)
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// comparePattern matches "http://domain/org/repo/compare/COMMIT1...COMMIT2#hash"
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comparePattern = regexp.MustCompile(`https?://(?:\S+/){4,5}([0-9a-f]{7,40})(\.\.\.?)([0-9a-f]{7,40})?(#[-+~_%.a-zA-Z0-9]+)?`)
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validLinksPattern = regexp.MustCompile(`^[a-z][\w-]+://`)
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// While this email regex is definitely not perfect and I'm sure you can come up
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// with edge cases, it is still accepted by the CommonMark specification, as
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// well as the HTML5 spec:
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// http://spec.commonmark.org/0.28/#email-address
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// https://html.spec.whatwg.org/multipage/input.html#e-mail-state-(type%3Demail)
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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|$))")
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// blackfriday extensions create IDs like fn:user-content-footnote
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blackfridayExtRegex = regexp.MustCompile(`[^:]*:user-content-`)
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// EmojiShortCodeRegex find emoji by alias like :smile:
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EmojiShortCodeRegex = regexp.MustCompile(`:[-+\w]+:`)
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)
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// CSS class for action keywords (e.g. "closes: #1")
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const keywordClass = "issue-keyword"
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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 isLink(link)
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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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func isLinkStr(link string) bool {
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return validLinksPattern.MatchString(link)
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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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// Once for to prevent races
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var issueFullPatternOnce sync.Once
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// regexp for full links to hash comment in pull request files changed tab
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var filesChangedFullPattern *regexp.Regexp
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// Once for to prevent races
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var filesChangedFullPatternOnce sync.Once
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func getIssueFullPattern() *regexp.Regexp {
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issueFullPatternOnce.Do(func() {
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// example: https://domain/org/repo/pulls/27#hash
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issueFullPattern = regexp.MustCompile(regexp.QuoteMeta(setting.AppURL) +
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`[\w_.-]+/[\w_.-]+/(?:issues|pulls)/((?:\w{1,10}-)?[1-9][0-9]*)([\?|#](\S+)?)?\b`)
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})
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return issueFullPattern
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}
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func getFilesChangedFullPattern() *regexp.Regexp {
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filesChangedFullPatternOnce.Do(func() {
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// example: https://domain/org/repo/pulls/27/files#hash
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filesChangedFullPattern = regexp.MustCompile(regexp.QuoteMeta(setting.AppURL) +
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`[\w_.-]+/[\w_.-]+/pulls/((?:\w{1,10}-)?[1-9][0-9]*)/files([\?|#](\S+)?)?\b`)
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})
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return filesChangedFullPattern
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}
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// CustomLinkURLSchemes allows for additional schemes to be detected when parsing links within text
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func CustomLinkURLSchemes(schemes []string) {
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schemes = append(schemes, "http", "https")
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withAuth := make([]string, 0, len(schemes))
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validScheme := regexp.MustCompile(`^[a-z]+$`)
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for _, s := range schemes {
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if !validScheme.MatchString(s) {
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continue
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}
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without := false
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for _, sna := range xurls.SchemesNoAuthority {
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if s == sna {
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without = true
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break
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}
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}
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if without {
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s += ":"
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} else {
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s += "://"
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}
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withAuth = append(withAuth, s)
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}
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common.LinkRegex, _ = xurls.StrictMatchingScheme(strings.Join(withAuth, "|"))
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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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type postProcessError struct {
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context string
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err error
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}
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func (p *postProcessError) Error() string {
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return "PostProcess: " + p.context + ", " + p.err.Error()
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}
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type processor func(ctx *RenderContext, node *html.Node)
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var defaultProcessors = []processor{
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fullIssuePatternProcessor,
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comparePatternProcessor,
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fullSha1PatternProcessor,
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shortLinkProcessor,
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linkProcessor,
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mentionProcessor,
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issueIndexPatternProcessor,
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commitCrossReferencePatternProcessor,
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sha1CurrentPatternProcessor,
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emailAddressProcessor,
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emojiProcessor,
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emojiShortCodeProcessor,
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}
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// PostProcess does the final required transformations to the passed raw HTML
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// data, and ensures its validity. Transformations include: replacing links and
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// emails with HTML links, parsing shortlinks in the format of [[Link]], like
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// MediaWiki, linking issues in the format #ID, and mentions in the format
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// @user, and others.
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func PostProcess(
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ctx *RenderContext,
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input io.Reader,
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output io.Writer,
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) error {
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return postProcess(ctx, defaultProcessors, input, output)
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}
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var commitMessageProcessors = []processor{
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fullIssuePatternProcessor,
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comparePatternProcessor,
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fullSha1PatternProcessor,
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linkProcessor,
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mentionProcessor,
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issueIndexPatternProcessor,
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commitCrossReferencePatternProcessor,
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sha1CurrentPatternProcessor,
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emailAddressProcessor,
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emojiProcessor,
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emojiShortCodeProcessor,
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}
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// RenderCommitMessage will use the same logic as PostProcess, but will disable
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// the shortLinkProcessor and will add a defaultLinkProcessor if defaultLink is
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// set, which changes every text node into a link to the passed default link.
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func RenderCommitMessage(
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ctx *RenderContext,
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content string,
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) (string, error) {
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procs := commitMessageProcessors
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if ctx.DefaultLink != "" {
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// we don't have to fear data races, because being
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// commitMessageProcessors of fixed len and cap, every time we append
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// something to it the slice is realloc+copied, so append always
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// generates the slice ex-novo.
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procs = append(procs, genDefaultLinkProcessor(ctx.DefaultLink))
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}
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return renderProcessString(ctx, procs, content)
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}
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var commitMessageSubjectProcessors = []processor{
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fullIssuePatternProcessor,
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comparePatternProcessor,
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fullSha1PatternProcessor,
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linkProcessor,
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mentionProcessor,
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issueIndexPatternProcessor,
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commitCrossReferencePatternProcessor,
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sha1CurrentPatternProcessor,
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emojiShortCodeProcessor,
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emojiProcessor,
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}
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var emojiProcessors = []processor{
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emojiShortCodeProcessor,
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emojiProcessor,
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}
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// RenderCommitMessageSubject will use the same logic as PostProcess and
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// RenderCommitMessage, but will disable the shortLinkProcessor and
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// emailAddressProcessor, will add a defaultLinkProcessor if defaultLink is set,
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// which changes every text node into a link to the passed default link.
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func RenderCommitMessageSubject(
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ctx *RenderContext,
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content string,
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) (string, error) {
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procs := commitMessageSubjectProcessors
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if ctx.DefaultLink != "" {
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// we don't have to fear data races, because being
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// commitMessageSubjectProcessors of fixed len and cap, every time we
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// append something to it the slice is realloc+copied, so append always
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// generates the slice ex-novo.
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procs = append(procs, genDefaultLinkProcessor(ctx.DefaultLink))
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}
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return renderProcessString(ctx, procs, content)
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}
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// RenderIssueTitle to process title on individual issue/pull page
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func RenderIssueTitle(
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ctx *RenderContext,
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title string,
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) (string, error) {
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return renderProcessString(ctx, []processor{
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issueIndexPatternProcessor,
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commitCrossReferencePatternProcessor,
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sha1CurrentPatternProcessor,
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emojiShortCodeProcessor,
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emojiProcessor,
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}, title)
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}
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func renderProcessString(ctx *RenderContext, procs []processor, content string) (string, error) {
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var buf strings.Builder
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if err := postProcess(ctx, procs, strings.NewReader(content), &buf); err != nil {
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return "", err
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}
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return buf.String(), nil
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}
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// RenderDescriptionHTML will use similar logic as PostProcess, but will
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// use a single special linkProcessor.
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func RenderDescriptionHTML(
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ctx *RenderContext,
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content string,
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) (string, error) {
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return renderProcessString(ctx, []processor{
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descriptionLinkProcessor,
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emojiShortCodeProcessor,
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emojiProcessor,
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}, content)
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}
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// RenderEmoji for when we want to just process emoji and shortcodes
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// in various places it isn't already run through the normal markdown processor
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func RenderEmoji(
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ctx *RenderContext,
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content string,
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) (string, error) {
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return renderProcessString(ctx, emojiProcessors, content)
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}
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var (
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tagCleaner = regexp.MustCompile(`<((?:/?\w+/\w+)|(?:/[\w ]+/)|(/?[hH][tT][mM][lL]\b)|(/?[hH][eE][aA][dD]\b))`)
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nulCleaner = strings.NewReplacer("\000", "")
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)
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func postProcess(ctx *RenderContext, procs []processor, input io.Reader, output io.Writer) error {
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defer ctx.Cancel()
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// FIXME: don't read all content to memory
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rawHTML, err := io.ReadAll(input)
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if err != nil {
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return err
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}
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// parse the HTML
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node, err := html.Parse(io.MultiReader(
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// prepend "<html><body>"
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strings.NewReader("<html><body>"),
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// Strip out nuls - they're always invalid
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bytes.NewReader(tagCleaner.ReplaceAll([]byte(nulCleaner.Replace(string(rawHTML))), []byte("<$1"))),
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// close the tags
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strings.NewReader("</body></html>"),
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))
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if err != nil {
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return &postProcessError{"invalid HTML", err}
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}
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if node.Type == html.DocumentNode {
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node = node.FirstChild
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}
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visitNode(ctx, procs, procs, node)
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newNodes := make([]*html.Node, 0, 5)
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if node.Data == "html" {
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node = node.FirstChild
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for node != nil && node.Data != "body" {
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node = node.NextSibling
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}
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}
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if node != nil {
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if node.Data == "body" {
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child := node.FirstChild
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for child != nil {
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newNodes = append(newNodes, child)
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child = child.NextSibling
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}
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} else {
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newNodes = append(newNodes, node)
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}
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}
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// Render everything to buf.
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for _, node := range newNodes {
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if err := html.Render(output, node); err != nil {
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return &postProcessError{"error rendering processed HTML", err}
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}
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}
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return nil
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}
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func visitNode(ctx *RenderContext, procs, textProcs []processor, node *html.Node) {
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// Add user-content- to IDs and "#" links if they don't already have them
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for idx, attr := range node.Attr {
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val := strings.TrimPrefix(attr.Val, "#")
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notHasPrefix := !(strings.HasPrefix(val, "user-content-") || blackfridayExtRegex.MatchString(val))
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|
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if attr.Key == "id" && notHasPrefix {
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node.Attr[idx].Val = "user-content-" + attr.Val
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}
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|
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if attr.Key == "href" && strings.HasPrefix(attr.Val, "#") && notHasPrefix {
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node.Attr[idx].Val = "#user-content-" + val
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}
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|
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if attr.Key == "class" && attr.Val == "emoji" {
|
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textProcs = nil
|
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}
|
||
}
|
||
|
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// We ignore code and pre.
|
||
switch node.Type {
|
||
case html.TextNode:
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textNode(ctx, textProcs, node)
|
||
case html.ElementNode:
|
||
if node.Data == "img" {
|
||
for i, attr := range node.Attr {
|
||
if attr.Key != "src" {
|
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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 || ctx.Metas["mode"] == "document" {
|
||
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
|
||
}
|