Fix and refactor markdown rendering (#32522)

16 files changed, 190 insertions, 188 deletions

diff --git a/modules/markup/html.go b/modules/markup/html.go
index 54c65c95d2..16ccd4b406 100644
--- a/modules/markup/html.go
+++ b/modules/markup/html.go
@@ -7,11 +7,11 @@ import (
 	"bytes"
 	"io"
 	"regexp"
+	"slices"
 	"strings"
 	"sync"
 
 	"code.gitea.io/gitea/modules/markup/common"
-	"code.gitea.io/gitea/modules/setting"
 
 	"golang.org/x/net/html"
 	"golang.org/x/net/html/atom"
@@ -25,7 +25,27 @@ const (
 	IssueNameStyleRegexp       = "regexp"
 )
 
-var (
+// CSS class for action keywords (e.g. "closes: #1")
+const keywordClass = "issue-keyword"
+
+type globalVarsType struct {
+	hashCurrentPattern      *regexp.Regexp
+	shortLinkPattern        *regexp.Regexp
+	anyHashPattern          *regexp.Regexp
+	comparePattern          *regexp.Regexp
+	fullURLPattern          *regexp.Regexp
+	emailRegex              *regexp.Regexp
+	blackfridayExtRegex     *regexp.Regexp
+	emojiShortCodeRegex     *regexp.Regexp
+	issueFullPattern        *regexp.Regexp
+	filesChangedFullPattern *regexp.Regexp
+
+	tagCleaner *regexp.Regexp
+	nulCleaner *strings.Replacer
+}
+
+var globalVars = sync.OnceValue[*globalVarsType](func() *globalVarsType {
+	v := &globalVarsType{}
 	// 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.
@@ -36,79 +56,56 @@ var (
 	// hashCurrentPattern matches string that represents a commit SHA, e.g. d8a994ef243349f321568f9e36d5c3f444b99cae
 	// Although SHA1 hashes are 40 chars long, SHA256 are 64, the regex matches the hash from 7 to 64 chars in length
 	// so that abbreviated hash links can be used as well. This matches git and GitHub usability.
-	hashCurrentPattern = regexp.MustCompile(`(?:\s|^|\(|\[)([0-9a-f]{7,64})(?:\s|$|\)|\]|[.,:](\s|$))`)
+	v.hashCurrentPattern = regexp.MustCompile(`(?:\s|^|\(|\[)([0-9a-f]{7,64})(?:\s|$|\)|\]|[.,:](\s|$))`)
 
 	// shortLinkPattern matches short but difficult to parse [[name|link|arg=test]] syntax
-	shortLinkPattern = regexp.MustCompile(`\[\[(.*?)\]\](\w*)`)
+	v.shortLinkPattern = regexp.MustCompile(`\[\[(.*?)\]\](\w*)`)
 
 	// anyHashPattern splits url containing SHA into parts
-	anyHashPattern = regexp.MustCompile(`https?://(?:\S+/){4,5}([0-9a-f]{40,64})(/[-+~%./\w]+)?(\?[-+~%.\w&=]+)?(#[-+~%.\w]+)?`)
+	v.anyHashPattern = regexp.MustCompile(`https?://(?:\S+/){4,5}([0-9a-f]{40,64})(/[-+~%./\w]+)?(\?[-+~%.\w&=]+)?(#[-+~%.\w]+)?`)
 
 	// comparePattern matches "http://domain/org/repo/compare/COMMIT1...COMMIT2#hash"
-	comparePattern = regexp.MustCompile(`https?://(?:\S+/){4,5}([0-9a-f]{7,64})(\.\.\.?)([0-9a-f]{7,64})?(#[-+~_%.a-zA-Z0-9]+)?`)
+	v.comparePattern = regexp.MustCompile(`https?://(?:\S+/){4,5}([0-9a-f]{7,64})(\.\.\.?)([0-9a-f]{7,64})?(#[-+~_%.a-zA-Z0-9]+)?`)
 
 	// fullURLPattern matches full URL like "mailto:...", "https://..." and "ssh+git://..."
-	fullURLPattern = regexp.MustCompile(`^[a-z][-+\w]+:`)
+	v.fullURLPattern = regexp.MustCompile(`^[a-z][-+\w]+:`)
 
 	// emailRegex is definitely not perfect with edge cases,
 	// it is still accepted by the CommonMark specification, as well as the HTML5 spec:
 	//   http://spec.commonmark.org/0.28/#email-address
 	//   https://html.spec.whatwg.org/multipage/input.html#e-mail-state-(type%3Demail)
-	emailRegex = regexp.MustCompile("(?:\\s|^|\\(|\\[)([a-zA-Z0-9.!#$%&'*+\\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9]{2,}(?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+)(?:\\s|$|\\)|\\]|;|,|\\?|!|\\.(\\s|$))")
+	v.emailRegex = regexp.MustCompile("(?:\\s|^|\\(|\\[)([a-zA-Z0-9.!#$%&'*+\\/=?^_`{|}~-]+@[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|$|\\)|\\]|;|,|\\?|!|\\.(\\s|$))")
 
 	// blackfridayExtRegex is for blackfriday extensions create IDs like fn:user-content-footnote
-	blackfridayExtRegex = regexp.MustCompile(`[^:]*:user-content-`)
+	v.blackfridayExtRegex = regexp.MustCompile(`[^:]*:user-content-`)
 
 	// emojiShortCodeRegex find emoji by alias like :smile:
-	emojiShortCodeRegex = regexp.MustCompile(`:[-+\w]+:`)
-)
+	v.emojiShortCodeRegex = regexp.MustCompile(`:[-+\w]+:`)
 
-// CSS class for action keywords (e.g. "closes: #1")
-const keywordClass = "issue-keyword"
+	// example: https://domain/org/repo/pulls/27#hash
+	v.issueFullPattern = regexp.MustCompile(`https?://(?:\S+/)[\w_.-]+/[\w_.-]+/(?:issues|pulls)/((?:\w{1,10}-)?[1-9][0-9]*)([\?|#](\S+)?)?\b`)
+
+	// example: https://domain/org/repo/pulls/27/files#hash
+	v.filesChangedFullPattern = regexp.MustCompile(`https?://(?:\S+/)[\w_.-]+/[\w_.-]+/pulls/((?:\w{1,10}-)?[1-9][0-9]*)/files([\?|#](\S+)?)?\b`)
+
+	v.tagCleaner = regexp.MustCompile(`<((?:/?\w+/\w+)|(?:/[\w ]+/)|(/?[hH][tT][mM][lL]\b)|(/?[hH][eE][aA][dD]\b))`)
+	v.nulCleaner = strings.NewReplacer("\000", "")
+	return v
+})
 
 // IsFullURLBytes reports whether link fits valid format.
 func IsFullURLBytes(link []byte) bool {
-	return fullURLPattern.Match(link)
+	return globalVars().fullURLPattern.Match(link)
 }
 
 func IsFullURLString(link string) bool {
-	return fullURLPattern.MatchString(link)
+	return globalVars().fullURLPattern.MatchString(link)
 }
 
 func IsNonEmptyRelativePath(link string) bool {
 	return link != "" && !IsFullURLString(link) && link[0] != '/' && link[0] != '?' && link[0] != '#'
 }
 
-// regexp for full links to issues/pulls
-var issueFullPattern *regexp.Regexp
-
-// Once for to prevent races
-var issueFullPatternOnce sync.Once
-
-// regexp for full links to hash comment in pull request files changed tab
-var filesChangedFullPattern *regexp.Regexp
-
-// Once for to prevent races
-var filesChangedFullPatternOnce sync.Once
-
-func getIssueFullPattern() *regexp.Regexp {
-	issueFullPatternOnce.Do(func() {
-		// example: https://domain/org/repo/pulls/27#hash
-		issueFullPattern = regexp.MustCompile(regexp.QuoteMeta(setting.AppURL) +
-			`[\w_.-]+/[\w_.-]+/(?:issues|pulls)/((?:\w{1,10}-)?[1-9][0-9]*)([\?|#](\S+)?)?\b`)
-	})
-	return issueFullPattern
-}
-
-func getFilesChangedFullPattern() *regexp.Regexp {
-	filesChangedFullPatternOnce.Do(func() {
-		// example: https://domain/org/repo/pulls/27/files#hash
-		filesChangedFullPattern = regexp.MustCompile(regexp.QuoteMeta(setting.AppURL) +
-			`[\w_.-]+/[\w_.-]+/pulls/((?:\w{1,10}-)?[1-9][0-9]*)/files([\?|#](\S+)?)?\b`)
-	})
-	return filesChangedFullPattern
-}
-
 // CustomLinkURLSchemes allows for additional schemes to be detected when parsing links within text
 func CustomLinkURLSchemes(schemes []string) {
 	schemes = append(schemes, "http", "https")
@@ -197,13 +194,6 @@ func RenderCommitMessage(
 	content string,
 ) (string, error) {
 	procs := commitMessageProcessors
-	if ctx.DefaultLink != "" {
-		// we don't have to fear data races, because being
-		// commitMessageProcessors of fixed len and cap, every time we append
-		// something to it the slice is realloc+copied, so append always
-		// generates the slice ex-novo.
-		procs = append(procs, genDefaultLinkProcessor(ctx.DefaultLink))
-	}
 	return renderProcessString(ctx, procs, content)
 }
 
@@ -231,16 +221,17 @@ var emojiProcessors = []processor{
 // which changes every text node into a link to the passed default link.
 func RenderCommitMessageSubject(
 	ctx *RenderContext,
-	content string,
+	defaultLink, content string,
 ) (string, error) {
-	procs := commitMessageSubjectProcessors
-	if ctx.DefaultLink != "" {
-		// we don't have to fear data races, because being
-		// commitMessageSubjectProcessors of fixed len and cap, every time we
-		// append something to it the slice is realloc+copied, so append always
-		// generates the slice ex-novo.
-		procs = append(procs, genDefaultLinkProcessor(ctx.DefaultLink))
-	}
+	procs := slices.Clone(commitMessageSubjectProcessors)
+	procs = append(procs, 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: "muted"}}
+		node.FirstChild, node.LastChild = ch, ch
+	})
 	return renderProcessString(ctx, procs, content)
 }
 
@@ -249,10 +240,8 @@ func RenderIssueTitle(
 	ctx *RenderContext,
 	title string,
 ) (string, error) {
+	// do not render other issue/commit links in an issue's title - which in most cases is already a link.
 	return renderProcessString(ctx, []processor{
-		issueIndexPatternProcessor,
-		commitCrossReferencePatternProcessor,
-		hashCurrentPatternProcessor,
 		emojiShortCodeProcessor,
 		emojiProcessor,
 	}, title)
@@ -288,11 +277,6 @@ func RenderEmoji(
 	return renderProcessString(ctx, emojiProcessors, content)
 }
 
-var (
-	tagCleaner = regexp.MustCompile(`<((?:/?\w+/\w+)|(?:/[\w ]+/)|(/?[hH][tT][mM][lL]\b)|(/?[hH][eE][aA][dD]\b))`)
-	nulCleaner = strings.NewReplacer("\000", "")
-)
-
 func postProcess(ctx *RenderContext, procs []processor, input io.Reader, output io.Writer) error {
 	defer ctx.Cancel()
 	// FIXME: don't read all content to memory
@@ -306,7 +290,7 @@ func postProcess(ctx *RenderContext, procs []processor, input io.Reader, output
 		// prepend "<html><body>"
 		strings.NewReader("<html><body>"),
 		// Strip out nuls - they're always invalid
-		bytes.NewReader(tagCleaner.ReplaceAll([]byte(nulCleaner.Replace(string(rawHTML))), []byte("&lt;$1"))),
+		bytes.NewReader(globalVars().tagCleaner.ReplaceAll([]byte(globalVars().nulCleaner.Replace(string(rawHTML))), []byte("&lt;$1"))),
 		// close the tags
 		strings.NewReader("</body></html>"),
 	))
@@ -353,7 +337,7 @@ func visitNode(ctx *RenderContext, procs []processor, node *html.Node) *html.Nod
 	// Add user-content- to IDs and "#" links if they don't already have them
 	for idx, attr := range node.Attr {
 		val := strings.TrimPrefix(attr.Val, "#")
-		notHasPrefix := !(strings.HasPrefix(val, "user-content-") || blackfridayExtRegex.MatchString(val))
+		notHasPrefix := !(strings.HasPrefix(val, "user-content-") || globalVars().blackfridayExtRegex.MatchString(val))
 
 		if attr.Key == "id" && notHasPrefix {
 			node.Attr[idx].Val = "user-content-" + attr.Val
diff --git a/modules/markup/html_commit.go b/modules/markup/html_commit.go
index 86d70746d4..0e674c83e1 100644
--- a/modules/markup/html_commit.go
+++ b/modules/markup/html_commit.go
@@ -54,7 +54,7 @@ func createCodeLink(href, content, class string) *html.Node {
 }
 
 func anyHashPatternExtract(s string) (ret anyHashPatternResult, ok bool) {
-	m := anyHashPattern.FindStringSubmatchIndex(s)
+	m := globalVars().anyHashPattern.FindStringSubmatchIndex(s)
 	if m == nil {
 		return ret, false
 	}
@@ -120,7 +120,7 @@ func comparePatternProcessor(ctx *RenderContext, node *html.Node) {
 			node = node.NextSibling
 			continue
 		}
-		m := comparePattern.FindStringSubmatchIndex(node.Data)
+		m := globalVars().comparePattern.FindStringSubmatchIndex(node.Data)
 		if m == nil || slices.Contains(m[:8], -1) { // ensure that every group (m[0]...m[7]) has a match
 			node = node.NextSibling
 			continue
@@ -173,7 +173,7 @@ func hashCurrentPatternProcessor(ctx *RenderContext, node *html.Node) {
 		ctx.ShaExistCache = make(map[string]bool)
 	}
 	for node != nil && node != next && start < len(node.Data) {
-		m := hashCurrentPattern.FindStringSubmatchIndex(node.Data[start:])
+		m := globalVars().hashCurrentPattern.FindStringSubmatchIndex(node.Data[start:])
 		if m == nil {
 			return
 		}
diff --git a/modules/markup/html_email.go b/modules/markup/html_email.go
index a062789b35..32d0285eb4 100644
--- a/modules/markup/html_email.go
+++ b/modules/markup/html_email.go
@@ -9,7 +9,7 @@ import "golang.org/x/net/html"
 func emailAddressProcessor(ctx *RenderContext, node *html.Node) {
 	next := node.NextSibling
 	for node != nil && node != next {
-		m := emailRegex.FindStringSubmatchIndex(node.Data)
+		m := globalVars().emailRegex.FindStringSubmatchIndex(node.Data)
 		if m == nil {
 			return
 		}
diff --git a/modules/markup/html_emoji.go b/modules/markup/html_emoji.go
index c60d06b823..6eacb2067f 100644
--- a/modules/markup/html_emoji.go
+++ b/modules/markup/html_emoji.go
@@ -62,7 +62,7 @@ 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:])
+		m := globalVars().emojiShortCodeRegex.FindStringSubmatchIndex(node.Data[start:])
 		if m == nil {
 			return
 		}
diff --git a/modules/markup/html_internal_test.go b/modules/markup/html_internal_test.go
index 2fb657f56b..cdcc94d563 100644
--- a/modules/markup/html_internal_test.go
+++ b/modules/markup/html_internal_test.go
@@ -40,17 +40,19 @@ func link(href, class, contents string) string {
 }
 
 var numericMetas = map[string]string{
-	"format": "https://someurl.com/{user}/{repo}/{index}",
-	"user":   "someUser",
-	"repo":   "someRepo",
-	"style":  IssueNameStyleNumeric,
+	"format":                       "https://someurl.com/{user}/{repo}/{index}",
+	"user":                         "someUser",
+	"repo":                         "someRepo",
+	"style":                        IssueNameStyleNumeric,
+	"markupAllowShortIssuePattern": "true",
 }
 
 var alphanumericMetas = map[string]string{
-	"format": "https://someurl.com/{user}/{repo}/{index}",
-	"user":   "someUser",
-	"repo":   "someRepo",
-	"style":  IssueNameStyleAlphanumeric,
+	"format":                       "https://someurl.com/{user}/{repo}/{index}",
+	"user":                         "someUser",
+	"repo":                         "someRepo",
+	"style":                        IssueNameStyleAlphanumeric,
+	"markupAllowShortIssuePattern": "true",
 }
 
 var regexpMetas = map[string]string{
@@ -62,8 +64,15 @@ var regexpMetas = map[string]string{
 
 // these values should match the TestOrgRepo const above
 var localMetas = map[string]string{
-	"user": "test-owner",
-	"repo": "test-repo",
+	"user":                         "test-owner",
+	"repo":                         "test-repo",
+	"markupAllowShortIssuePattern": "true",
+}
+
+var localWikiMetas = map[string]string{
+	"user":              "test-owner",
+	"repo":              "test-repo",
+	"markupContentMode": "wiki",
 }
 
 func TestRender_IssueIndexPattern(t *testing.T) {
@@ -124,9 +133,8 @@ func TestRender_IssueIndexPattern2(t *testing.T) {
 		}
 		expectedNil := fmt.Sprintf(expectedFmt, links...)
 		testRenderIssueIndexPattern(t, s, expectedNil, &RenderContext{
-			Ctx:         git.DefaultContext,
-			Metas:       localMetas,
-			ContentMode: RenderContentAsComment,
+			Ctx:   git.DefaultContext,
+			Metas: localMetas,
 		})
 
 		class := "ref-issue"
@@ -139,9 +147,8 @@ func TestRender_IssueIndexPattern2(t *testing.T) {
 		}
 		expectedNum := fmt.Sprintf(expectedFmt, links...)
 		testRenderIssueIndexPattern(t, s, expectedNum, &RenderContext{
-			Ctx:         git.DefaultContext,
-			Metas:       numericMetas,
-			ContentMode: RenderContentAsComment,
+			Ctx:   git.DefaultContext,
+			Metas: numericMetas,
 		})
 	}
 
@@ -262,7 +269,7 @@ func TestRender_IssueIndexPattern5(t *testing.T) {
 	})
 }
 
-func TestRender_IssueIndexPattern_Document(t *testing.T) {
+func TestRender_IssueIndexPattern_NoShortPattern(t *testing.T) {
 	setting.AppURL = TestAppURL
 	metas := map[string]string{
 		"format": "https://someurl.com/{user}/{repo}/{index}",
@@ -285,6 +292,22 @@ func TestRender_IssueIndexPattern_Document(t *testing.T) {
 	})
 }
 
+func TestRender_RenderIssueTitle(t *testing.T) {
+	setting.AppURL = TestAppURL
+	metas := map[string]string{
+		"format": "https://someurl.com/{user}/{repo}/{index}",
+		"user":   "someUser",
+		"repo":   "someRepo",
+		"style":  IssueNameStyleNumeric,
+	}
+	actual, err := RenderIssueTitle(&RenderContext{
+		Ctx:   git.DefaultContext,
+		Metas: metas,
+	}, "#1")
+	assert.NoError(t, err)
+	assert.Equal(t, "#1", actual)
+}
+
 func testRenderIssueIndexPattern(t *testing.T, input, expected string, ctx *RenderContext) {
 	ctx.Links.AbsolutePrefix = true
 	if ctx.Links.Base == "" {
@@ -318,8 +341,7 @@ func TestRender_AutoLink(t *testing.T) {
 			Links: Links{
 				Base: TestRepoURL,
 			},
-			Metas:       localMetas,
-			ContentMode: RenderContentAsWiki,
+			Metas: localWikiMetas,
 		}, strings.NewReader(input), &buffer)
 		assert.Equal(t, err, nil)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer.String()))
@@ -391,10 +413,10 @@ func TestRegExp_sha1CurrentPattern(t *testing.T) {
 	}
 
 	for _, testCase := range trueTestCases {
-		assert.True(t, hashCurrentPattern.MatchString(testCase))
+		assert.True(t, globalVars().hashCurrentPattern.MatchString(testCase))
 	}
 	for _, testCase := range falseTestCases {
-		assert.False(t, hashCurrentPattern.MatchString(testCase))
+		assert.False(t, globalVars().hashCurrentPattern.MatchString(testCase))
 	}
 }
 
@@ -474,9 +496,9 @@ func TestRegExp_shortLinkPattern(t *testing.T) {
 	}
 
 	for _, testCase := range trueTestCases {
-		assert.True(t, shortLinkPattern.MatchString(testCase))
+		assert.True(t, globalVars().shortLinkPattern.MatchString(testCase))
 	}
 	for _, testCase := range falseTestCases {
-		assert.False(t, shortLinkPattern.MatchString(testCase))
+		assert.False(t, globalVars().shortLinkPattern.MatchString(testCase))
 	}
 }
diff --git a/modules/markup/html_issue.go b/modules/markup/html_issue.go
index fa630656ce..2acf154ad2 100644
--- a/modules/markup/html_issue.go
+++ b/modules/markup/html_issue.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/httplib"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/references"
 	"code.gitea.io/gitea/modules/regexplru"
@@ -23,18 +24,21 @@ func fullIssuePatternProcessor(ctx *RenderContext, node *html.Node) {
 	}
 	next := node.NextSibling
 	for node != nil && node != next {
-		m := getIssueFullPattern().FindStringSubmatchIndex(node.Data)
+		m := globalVars().issueFullPattern.FindStringSubmatchIndex(node.Data)
 		if m == nil {
 			return
 		}
 
-		mDiffView := getFilesChangedFullPattern().FindStringSubmatchIndex(node.Data)
+		mDiffView := globalVars().filesChangedFullPattern.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]]
+		if !httplib.IsCurrentGiteaSiteURL(ctx.Ctx, link) {
+			return
+		}
 		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)
@@ -67,8 +71,10 @@ func issueIndexPatternProcessor(ctx *RenderContext, node *html.Node) {
 		return
 	}
 
-	// crossLinkOnly if not comment and not wiki
-	crossLinkOnly := ctx.ContentMode != RenderContentAsTitle && ctx.ContentMode != RenderContentAsComment && ctx.ContentMode != RenderContentAsWiki
+	// crossLinkOnly: do not parse "#123", only parse "owner/repo#123"
+	// if there is no repo in the context, then the "#123" format can't be parsed
+	// old logic: crossLinkOnly := ctx.Metas["mode"] == "document" && !ctx.IsWiki
+	crossLinkOnly := ctx.Metas["markupAllowShortIssuePattern"] != "true"
 
 	var (
 		found bool
diff --git a/modules/markup/html_link.go b/modules/markup/html_link.go
index 30564da548..b7562d0aa6 100644
--- a/modules/markup/html_link.go
+++ b/modules/markup/html_link.go
@@ -20,9 +20,9 @@ func ResolveLink(ctx *RenderContext, link, userContentAnchorPrefix string) (resu
 	isAnchorFragment := link != "" && link[0] == '#'
 	if !isAnchorFragment && !IsFullURLString(link) {
 		linkBase := ctx.Links.Base
-		if ctx.ContentMode == RenderContentAsWiki {
+		if ctx.IsMarkupContentWiki() {
 			// no need to check if the link should be resolved as a wiki link or a wiki raw link
-			// just use wiki link here and it will be redirected to a wiki raw link if necessary
+			// just use wiki link here, and it will be redirected to a wiki raw link if necessary
 			linkBase = ctx.Links.WikiLink()
 		} else if ctx.Links.BranchPath != "" || ctx.Links.TreePath != "" {
 			// if there is no BranchPath, then the link will be something like "/owner/repo/src/{the-file-path}"
@@ -40,7 +40,7 @@ func ResolveLink(ctx *RenderContext, link, userContentAnchorPrefix string) (resu
 func shortLinkProcessor(ctx *RenderContext, node *html.Node) {
 	next := node.NextSibling
 	for node != nil && node != next {
-		m := shortLinkPattern.FindStringSubmatchIndex(node.Data)
+		m := globalVars().shortLinkPattern.FindStringSubmatchIndex(node.Data)
 		if m == nil {
 			return
 		}
@@ -147,7 +147,7 @@ func shortLinkProcessor(ctx *RenderContext, node *html.Node) {
 		}
 		if image {
 			if !absoluteLink {
-				link = util.URLJoin(ctx.Links.ResolveMediaLink(ctx.ContentMode == RenderContentAsWiki), link)
+				link = util.URLJoin(ctx.Links.ResolveMediaLink(ctx.IsMarkupContentWiki()), link)
 			}
 			title := props["title"]
 			if title == "" {
@@ -200,25 +200,6 @@ func linkProcessor(ctx *RenderContext, node *html.Node) {
 	}
 }
 
-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
diff --git a/modules/markup/html_node.go b/modules/markup/html_node.go
index c499854053..234adba2bf 100644
--- a/modules/markup/html_node.go
+++ b/modules/markup/html_node.go
@@ -17,7 +17,7 @@ func visitNodeImg(ctx *RenderContext, img *html.Node) (next *html.Node) {
 		}
 
 		if IsNonEmptyRelativePath(attr.Val) {
-			attr.Val = util.URLJoin(ctx.Links.ResolveMediaLink(ctx.ContentMode == RenderContentAsWiki), attr.Val)
+			attr.Val = util.URLJoin(ctx.Links.ResolveMediaLink(ctx.IsMarkupContentWiki()), attr.Val)
 
 			// By default, the "<img>" tag should also be clickable,
 			// because frontend use `<img>` to paste the re-scaled image into the markdown,
@@ -53,7 +53,7 @@ func visitNodeVideo(ctx *RenderContext, node *html.Node) (next *html.Node) {
 			continue
 		}
 		if IsNonEmptyRelativePath(attr.Val) {
-			attr.Val = util.URLJoin(ctx.Links.ResolveMediaLink(ctx.ContentMode == RenderContentAsWiki), attr.Val)
+			attr.Val = util.URLJoin(ctx.Links.ResolveMediaLink(ctx.IsMarkupContentWiki()), attr.Val)
 		}
 		attr.Val = camoHandleLink(attr.Val)
 		node.Attr[i] = attr
diff --git a/modules/markup/html_test.go b/modules/markup/html_test.go
index 262d0fc4dd..67ac2758a3 100644
--- a/modules/markup/html_test.go
+++ b/modules/markup/html_test.go
@@ -27,6 +27,11 @@ var (
 		"user": testRepoOwnerName,
 		"repo": testRepoName,
 	}
+	localWikiMetas = map[string]string{
+		"user":              testRepoOwnerName,
+		"repo":              testRepoName,
+		"markupContentMode": "wiki",
+	}
 )
 
 type mockRepo struct {
@@ -413,8 +418,7 @@ func TestRender_ShortLinks(t *testing.T) {
 			Links: markup.Links{
 				Base: markup.TestRepoURL,
 			},
-			Metas:       localMetas,
-			ContentMode: markup.RenderContentAsWiki,
+			Metas: localWikiMetas,
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expectedWiki), strings.TrimSpace(string(buffer)))
@@ -526,10 +530,9 @@ func TestRender_ShortLinks(t *testing.T) {
 func TestRender_RelativeMedias(t *testing.T) {
 	render := func(input string, isWiki bool, links markup.Links) string {
 		buffer, err := markdown.RenderString(&markup.RenderContext{
-			Ctx:         git.DefaultContext,
-			Links:       links,
-			Metas:       localMetas,
-			ContentMode: util.Iif(isWiki, markup.RenderContentAsWiki, markup.RenderContentAsComment),
+			Ctx:   git.DefaultContext,
+			Links: links,
+			Metas: util.Iif(isWiki, localWikiMetas, localMetas),
 		}, input)
 		assert.NoError(t, err)
 		return strings.TrimSpace(string(buffer))
diff --git a/modules/markup/markdown/goldmark.go b/modules/markup/markdown/goldmark.go
index c8488cfb50..c837b21e78 100644
--- a/modules/markup/markdown/goldmark.go
+++ b/modules/markup/markdown/goldmark.go
@@ -75,11 +75,12 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
 				// TODO: this was a quite unclear part, old code: `if metas["mode"] != "document" { use comment link break setting }`
 				// many places render non-comment contents with no mode=document, then these contents also use comment's hard line break setting
 				// especially in many tests.
+				markdownLineBreakStyle := ctx.Metas["markdownLineBreakStyle"]
 				if markup.RenderBehaviorForTesting.ForceHardLineBreak {
 					v.SetHardLineBreak(true)
-				} else if ctx.ContentMode == markup.RenderContentAsComment {
+				} else if markdownLineBreakStyle == "comment" {
 					v.SetHardLineBreak(setting.Markdown.EnableHardLineBreakInComments)
-				} else {
+				} else if markdownLineBreakStyle == "document" {
 					v.SetHardLineBreak(setting.Markdown.EnableHardLineBreakInDocuments)
 				}
 			}
diff --git a/modules/markup/markdown/markdown_test.go b/modules/markup/markdown/markdown_test.go
index 315eed2e62..780df8727f 100644
--- a/modules/markup/markdown/markdown_test.go
+++ b/modules/markup/markdown/markdown_test.go
@@ -37,6 +37,12 @@ var localMetas = map[string]string{
 	"repo": testRepoName,
 }
 
+var localWikiMetas = map[string]string{
+	"user":              testRepoOwnerName,
+	"repo":              testRepoName,
+	"markupContentMode": "wiki",
+}
+
 type mockRepo struct {
 	OwnerName string
 	RepoName  string
@@ -75,7 +81,7 @@ func TestRender_StandardLinks(t *testing.T) {
 			Links: markup.Links{
 				Base: FullURL,
 			},
-			ContentMode: markup.RenderContentAsWiki,
+			Metas: localWikiMetas,
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expectedWiki), strings.TrimSpace(string(buffer)))
@@ -307,9 +313,8 @@ func TestTotal_RenderWiki(t *testing.T) {
 			Links: markup.Links{
 				Base: FullURL,
 			},
-			Repo:        newMockRepo(testRepoOwnerName, testRepoName),
-			Metas:       localMetas,
-			ContentMode: markup.RenderContentAsWiki,
+			Repo:  newMockRepo(testRepoOwnerName, testRepoName),
+			Metas: localWikiMetas,
 		}, sameCases[i])
 		assert.NoError(t, err)
 		assert.Equal(t, answers[i], string(line))
@@ -334,7 +339,7 @@ func TestTotal_RenderWiki(t *testing.T) {
 			Links: markup.Links{
 				Base: FullURL,
 			},
-			ContentMode: markup.RenderContentAsWiki,
+			Metas: localWikiMetas,
 		}, testCases[i])
 		assert.NoError(t, err)
 		assert.EqualValues(t, testCases[i+1], string(line))
@@ -657,9 +662,9 @@ mail@domain.com
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="/image.jpg" rel="nofollow"><img src="/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -684,9 +689,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="/wiki/raw/image.jpg" rel="nofollow"><img src="/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -713,9 +718,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="https://gitea.io/image.jpg" rel="nofollow"><img src="https://gitea.io/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -742,9 +747,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="https://gitea.io/wiki/raw/image.jpg" rel="nofollow"><img src="https://gitea.io/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -771,9 +776,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="/relative/path/image.jpg" rel="nofollow"><img src="/relative/path/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -800,9 +805,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -830,9 +835,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="/user/repo/media/branch/main/image.jpg" rel="nofollow"><img src="/user/repo/media/branch/main/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -860,9 +865,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -890,9 +895,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="/user/repo/image.jpg" rel="nofollow"><img src="/user/repo/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -920,9 +925,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -951,9 +956,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="/user/repo/media/branch/main/sub/folder/image.jpg" rel="nofollow"><img src="/user/repo/media/branch/main/sub/folder/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -982,9 +987,9 @@ space</p>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
 <a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
-<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
-<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit<br/>
 <span class="emoji" aria-label="thumbs up">👍</span><br/>
 <a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a><br/>
@@ -999,9 +1004,9 @@ space</p>
 	defer test.MockVariableValue(&markup.RenderBehaviorForTesting.DisableInternalAttributes, true)()
 	for i, c := range cases {
 		result, err := markdown.RenderString(&markup.RenderContext{
-			Ctx:         context.Background(),
-			Links:       c.Links,
-			ContentMode: util.Iif(c.IsWiki, markup.RenderContentAsWiki, markup.RenderContentAsDefault),
+			Ctx:   context.Background(),
+			Links: c.Links,
+			Metas: util.Iif(c.IsWiki, map[string]string{"markupContentMode": "wiki"}, map[string]string{}),
 		}, input)
 		assert.NoError(t, err, "Unexpected error in testcase: %v", i)
 		assert.Equal(t, c.Expected, string(result), "Unexpected result in testcase %v", i)
diff --git a/modules/markup/markdown/transform_image.go b/modules/markup/markdown/transform_image.go
index 4ed4118854..b2262c1c78 100644
--- a/modules/markup/markdown/transform_image.go
+++ b/modules/markup/markdown/transform_image.go
@@ -21,7 +21,7 @@ func (g *ASTTransformer) transformImage(ctx *markup.RenderContext, v *ast.Image)
 	// Check if the destination is a real link
 	if len(v.Destination) > 0 && !markup.IsFullURLBytes(v.Destination) {
 		v.Destination = []byte(giteautil.URLJoin(
-			ctx.Links.ResolveMediaLink(ctx.ContentMode == markup.RenderContentAsWiki),
+			ctx.Links.ResolveMediaLink(ctx.IsMarkupContentWiki()),
 			strings.TrimLeft(string(v.Destination), "/"),
 		))
 	}
diff --git a/modules/markup/orgmode/orgmode.go b/modules/markup/orgmode/orgmode.go
index 6b9c963157..c587a6ada5 100644
--- a/modules/markup/orgmode/orgmode.go
+++ b/modules/markup/orgmode/orgmode.go
@@ -144,15 +144,14 @@ func (r *Writer) resolveLink(kind, link string) string {
 		}
 
 		base := r.Ctx.Links.Base
-		isWiki := r.Ctx.ContentMode == markup.RenderContentAsWiki
-		if isWiki {
+		if r.Ctx.IsMarkupContentWiki() {
 			base = r.Ctx.Links.WikiLink()
 		} else if r.Ctx.Links.HasBranchInfo() {
 			base = r.Ctx.Links.SrcLink()
 		}
 
 		if kind == "image" || kind == "video" {
-			base = r.Ctx.Links.ResolveMediaLink(isWiki)
+			base = r.Ctx.Links.ResolveMediaLink(r.Ctx.IsMarkupContentWiki())
 		}
 
 		link = util.URLJoin(base, link)
diff --git a/modules/markup/orgmode/orgmode_test.go b/modules/markup/orgmode/orgmode_test.go
index b882678c7e..a3eefc3db3 100644
--- a/modules/markup/orgmode/orgmode_test.go
+++ b/modules/markup/orgmode/orgmode_test.go
@@ -27,7 +27,7 @@ func TestRender_StandardLinks(t *testing.T) {
 				Base:       "/relative-path",
 				BranchPath: "branch/main",
 			},
-			ContentMode: util.Iif(isWiki, markup.RenderContentAsWiki, markup.RenderContentAsDefault),
+			Metas: map[string]string{"markupContentMode": util.Iif(isWiki, "wiki", "")},
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
diff --git a/modules/markup/render.go b/modules/markup/render.go
index add50f4382..1977dc73f5 100644
--- a/modules/markup/render.go
+++ b/modules/markup/render.go
@@ -27,15 +27,6 @@ const (
 	RenderMetaAsTable   RenderMetaMode = "table"
 )
 
-type RenderContentMode string
-
-const (
-	RenderContentAsDefault RenderContentMode = "" // empty means "default", no special handling, maybe just a simple "document"
-	RenderContentAsComment RenderContentMode = "comment"
-	RenderContentAsTitle   RenderContentMode = "title"
-	RenderContentAsWiki    RenderContentMode = "wiki"
-)
-
 var RenderBehaviorForTesting struct {
 	// Markdown line break rendering has 2 default behaviors:
 	// * Use hard: replace "\n" with "<br>" for comments, setting.Markdown.EnableHardLineBreakInComments=true
@@ -59,12 +50,14 @@ type RenderContext struct {
 	// for file mode, it could be left as empty, and will be detected by file extension in RelativePath
 	MarkupType string
 
-	// what the content will be used for: eg: for comment or for wiki? or just render a file?
-	ContentMode RenderContentMode
+	Links Links // special link references for rendering, especially when there is a branch/tree path
+
+	// user&repo, format&style&regexp (for external issue pattern), teams&org (for mention)
+	// BranchNameSubURL (for iframe&asciicast)
+	// markupAllowShortIssuePattern, markupContentMode (wiki)
+	// markdownLineBreakStyle (comment, document)
+	Metas map[string]string
 
-	Links            Links             // special link references for rendering, especially when there is a branch/tree path
-	Metas            map[string]string // user&repo, format&style&regexp (for external issue pattern), teams&org (for mention), BranchNameSubURL(for iframe&asciicast)
-	DefaultLink      string            // TODO: need to figure out
 	GitRepo          *git.Repository
 	Repo             gitrepo.Repository
 	ShaExistCache    map[string]bool
@@ -102,6 +95,10 @@ func (ctx *RenderContext) AddCancel(fn func()) {
 	}
 }
 
+func (ctx *RenderContext) IsMarkupContentWiki() bool {
+	return ctx.Metas != nil && ctx.Metas["markupContentMode"] == "wiki"
+}
+
 // Render renders markup file to HTML with all specific handling stuff.
 func Render(ctx *RenderContext, input io.Reader, output io.Writer) error {
 	if ctx.MarkupType == "" && ctx.RelativePath != "" {
@@ -232,3 +229,7 @@ func Init(ph *ProcessorHelper) {
 		}
 	}
 }
+
+func ComposeSimpleDocumentMetas() map[string]string {
+	return map[string]string{"markdownLineBreakStyle": "document"}
+}
diff --git a/modules/markup/render_links.go b/modules/markup/render_links.go
index 3e1aa7ce3a..c8339d8f8b 100644
--- a/modules/markup/render_links.go
+++ b/modules/markup/render_links.go
@@ -10,7 +10,7 @@ import (
 
 type Links struct {
 	AbsolutePrefix bool   // add absolute URL prefix to auto-resolved links like "#issue", but not for pre-provided links and medias
-	Base           string // base prefix for pre-provided links and medias (images, videos)
+	Base           string // base prefix for pre-provided links and medias (images, videos), usually it is the path to the repo
 	BranchPath     string // actually it is the ref path, eg: "branch/features/feat-12", "tag/v1.0"
 	TreePath       string // the dir of the file, eg: "doc" if the file "doc/CHANGE.md" is being rendered
 }