Rework markup link rendering (#26745)

Fixes #26548

This PR refactors the rendering of markup links. The old code uses
`strings.Replace` to change some urls while the new code uses more
context to decide which link should be generated.

The added tests should ensure the same output for the old and new
behaviour (besides the bug).

We may need to refactor the rendering a bit more to make it clear how
the different helper methods render the input string. There are lots of
options (resolve links / images / mentions / git hashes / emojis / ...)
but you don't really know what helper uses which options. For example,
we currently support images in the user description which should not be
allowed I think:

<details>
  <summary>Profile</summary> 

https://try.gitea.io/KN4CK3R

![grafik](https://github.com/go-gitea/gitea/assets/1666336/109ae422-496d-4200-b52e-b3a528f553e5)

</details>

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

models/issues/comment_code.go

@@ -110,7 +110,9 @@ func findCodeComments(ctx context.Context, opts FindCommentsOptions, issue *Issu
 		var err error
 		if comment.RenderedContent, err = markdown.RenderString(&markup.RenderContext{
 			Ctx: ctx,
-			URLPrefix: issue.Repo.Link(),
+			Links: markup.Links{
+				Base: issue.Repo.Link(),
+			},
 			Metas: issue.Repo.ComposeMetas(ctx),
 		}, comment.Content); err != nil {
 			return nil, err

models/repo/repo.go

@@ -585,7 +585,6 @@ func (repo *Repository) CanEnableEditor() bool {
 func (repo *Repository) DescriptionHTML(ctx context.Context) template.HTML {
 	desc, err := markup.RenderDescriptionHTML(&markup.RenderContext{
 		Ctx: ctx,
-		URLPrefix: repo.HTMLURL(),
 		// Don't use Metas to speedup requests
 	}, repo.Description)
 	if err != nil {

modules/markup/external/external.go

@@ -79,9 +79,10 @@ func envMark(envName string) string {
 // Render renders the data of the document to HTML via the external tool.
 func (p *Renderer) Render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error {
 	var (
-		urlRawPrefix = strings.Replace(ctx.URLPrefix, "/src/", "/raw/", 1)
-		command      = strings.NewReplacer(envMark("GITEA_PREFIX_SRC"), ctx.URLPrefix,
-			envMark("GITEA_PREFIX_RAW"), urlRawPrefix).Replace(p.Command)
+		command = strings.NewReplacer(
+			envMark("GITEA_PREFIX_SRC"), ctx.Links.SrcLink(),
+			envMark("GITEA_PREFIX_RAW"), ctx.Links.RawLink(),
+		).Replace(p.Command)
 		commands = strings.Fields(command)
 		args     = commands[1:]
 	)
@@ -121,14 +122,14 @@ func (p *Renderer) Render(ctx *markup.RenderContext, input io.Reader, output io.
 		ctx.Ctx = graceful.GetManager().ShutdownContext()
 	}
 
-	processCtx, _, finished := process.GetManager().AddContext(ctx.Ctx, fmt.Sprintf("Render [%s] for %s", commands[0], ctx.URLPrefix))
+	processCtx, _, finished := process.GetManager().AddContext(ctx.Ctx, fmt.Sprintf("Render [%s] for %s", commands[0], ctx.Links.SrcLink()))
 	defer finished()
 
 	cmd := exec.CommandContext(processCtx, commands[0], args...)
 	cmd.Env = append(
 		os.Environ(),
-		"GITEA_PREFIX_SRC="+ctx.URLPrefix,
-		"GITEA_PREFIX_RAW="+urlRawPrefix,
+		"GITEA_PREFIX_SRC="+ctx.Links.SrcLink(),
+		"GITEA_PREFIX_RAW="+ctx.Links.RawLink(),
 	)
 	if !p.IsInputFile {
 		cmd.Stdin = input

modules/markup/html.go

@@ -80,15 +80,10 @@ const keywordClass = "issue-keyword"
 
 // IsLink reports whether link fits valid format.
 func IsLink(link []byte) bool {
-	return isLink(link)
-}
-
-// isLink reports whether link fits valid format.
-func isLink(link []byte) bool {
 	return validLinksPattern.Match(link)
 }
 
-func isLinkStr(link string) bool {
+func IsLinkStr(link string) bool {
 	return validLinksPattern.MatchString(link)
 }
 
@@ -344,7 +339,7 @@ func postProcess(ctx *RenderContext, procs []processor, input io.Reader, output
 		node = node.FirstChild
 	}
 
-	visitNode(ctx, procs, procs, node)
+	visitNode(ctx, procs, node)
 
 	newNodes := make([]*html.Node, 0, 5)
 
@@ -375,7 +370,7 @@ func postProcess(ctx *RenderContext, procs []processor, input io.Reader, output
 	return nil
 }
 
-func visitNode(ctx *RenderContext, procs, textProcs []processor, node *html.Node) {
+func visitNode(ctx *RenderContext, procs []processor, node *html.Node) {
 	// Add user-content- to IDs and "#" links if they don't already have them
 	for idx, attr := range node.Attr {
 		val := strings.TrimPrefix(attr.Val, "#")
@@ -390,35 +385,29 @@ func visitNode(ctx *RenderContext, procs, textProcs []processor, node *html.Node
 		}
 
 		if attr.Key == "class" && attr.Val == "emoji" {
-			textProcs = nil
+			procs = nil
 		}
 	}
 
 	// We ignore code and pre.
 	switch node.Type {
 	case html.TextNode:
-		textNode(ctx, textProcs, node)
+		textNode(ctx, procs, node)
 	case html.ElementNode:
 		if node.Data == "img" {
 			for i, attr := range node.Attr {
 				if attr.Key != "src" {
 					continue
 				}
-				if len(attr.Val) > 0 && !isLinkStr(attr.Val) && !strings.HasPrefix(attr.Val, "data:image/") {
-					prefix := ctx.URLPrefix
-					if ctx.IsWiki {
-						prefix = util.URLJoin(prefix, "wiki", "raw")
-					}
-					prefix = strings.Replace(prefix, "/src/", "/media/", 1)
-
-					attr.Val = util.URLJoin(prefix, attr.Val)
+				if len(attr.Val) > 0 && !IsLinkStr(attr.Val) && !strings.HasPrefix(attr.Val, "data:image/") {
+					attr.Val = util.URLJoin(ctx.Links.ResolveMediaLink(ctx.IsWiki), attr.Val)
 				}
 				attr.Val = camoHandleLink(attr.Val)
 				node.Attr[i] = attr
 			}
 		} else if node.Data == "a" {
 			// Restrict text in links to emojis
-			textProcs = emojiProcessors
+			procs = emojiProcessors
 		} else if node.Data == "code" || node.Data == "pre" {
 			return
 		} else if node.Data == "i" {
@@ -444,7 +433,7 @@ func visitNode(ctx *RenderContext, procs, textProcs []processor, node *html.Node
 			}
 		}
 		for n := node.FirstChild; n != nil; n = n.NextSibling {
-			visitNode(ctx, procs, textProcs, n)
+			visitNode(ctx, procs, n)
 		}
 	}
 	// ignore everything else
@@ -641,10 +630,6 @@ func mentionProcessor(ctx *RenderContext, node *html.Node) {
 }
 
 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)
@@ -665,7 +650,7 @@ func shortLinkProcessorFull(ctx *RenderContext, node *html.Node, noLink bool) {
 			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 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
@@ -740,7 +725,7 @@ func shortLinkProcessorFull(ctx *RenderContext, node *html.Node, noLink bool) {
 			DataAtom:   atom.A,
 		}
 		childNode.Parent = linkNode
-		absoluteLink := isLinkStr(link)
+		absoluteLink := IsLinkStr(link)
 		if !absoluteLink {
 			if image {
 				link = strings.ReplaceAll(link, " ", "+")
@@ -751,16 +736,9 @@ func shortLinkProcessorFull(ctx *RenderContext, node *html.Node, noLink bool) {
 				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)
+				link = util.URLJoin(ctx.Links.ResolveMediaLink(ctx.IsWiki), link)
 			}
 			title := props["title"]
 			if title == "" {
@@ -789,18 +767,15 @@ func shortLinkProcessorFull(ctx *RenderContext, node *html.Node, noLink bool) {
 		} else {
 			if !absoluteLink {
 				if ctx.IsWiki {
-					link = util.URLJoin("wiki", link)
+					link = util.URLJoin(ctx.Links.WikiLink(), link)
+				} else {
+					link = util.URLJoin(ctx.Links.SrcLink(), 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
 	}

modules/markup/html_internal_test.go

@@ -287,8 +287,8 @@ func TestRender_IssueIndexPattern_Document(t *testing.T) {
 }
 
 func testRenderIssueIndexPattern(t *testing.T, input, expected string, ctx *RenderContext) {
-	if ctx.URLPrefix == "" {
-		ctx.URLPrefix = TestAppURL
+	if ctx.Links.Base == "" {
+		ctx.Links.Base = TestRepoURL
 	}
 
 	var buf strings.Builder
@@ -304,7 +304,9 @@ func TestRender_AutoLink(t *testing.T) {
 		var buffer strings.Builder
 		err := PostProcess(&RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: TestRepoURL,
+			Links: Links{
+				Base: TestRepoURL,
+			},
 			Metas: localMetas,
 		}, strings.NewReader(input), &buffer)
 		assert.Equal(t, err, nil)
@@ -313,7 +315,9 @@ func TestRender_AutoLink(t *testing.T) {
 		buffer.Reset()
 		err = PostProcess(&RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: TestRepoURL,
+			Links: Links{
+				Base: TestRepoURL,
+			},
 			Metas:  localMetas,
 			IsWiki: true,
 		}, strings.NewReader(input), &buffer)
@@ -343,7 +347,9 @@ func TestRender_FullIssueURLs(t *testing.T) {
 		var result strings.Builder
 		err := postProcess(&RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: TestRepoURL,
+			Links: Links{
+				Base: TestRepoURL,
+			},
 			Metas: localMetas,
 		}, []processor{fullIssuePatternProcessor}, strings.NewReader(input), &result)
 		assert.NoError(t, err)

modules/markup/html_test.go

@@ -42,7 +42,9 @@ func TestRender_Commits(t *testing.T) {
 		buffer, err := markup.RenderString(&markup.RenderContext{
 			Ctx:          git.DefaultContext,
 			RelativePath: ".md",
-			URLPrefix:    markup.TestRepoURL,
+			Links: markup.Links{
+				Base: markup.TestRepoURL,
+			},
 			Metas: localMetas,
 		}, input)
 		assert.NoError(t, err)
@@ -93,7 +95,9 @@ func TestRender_CrossReferences(t *testing.T) {
 		buffer, err := markup.RenderString(&markup.RenderContext{
 			Ctx:          git.DefaultContext,
 			RelativePath: "a.md",
-			URLPrefix:    setting.AppSubURL,
+			Links: markup.Links{
+				Base: setting.AppSubURL,
+			},
 			Metas: localMetas,
 		}, input)
 		assert.NoError(t, err)
@@ -138,7 +142,9 @@ func TestRender_links(t *testing.T) {
 		buffer, err := markup.RenderString(&markup.RenderContext{
 			Ctx:          git.DefaultContext,
 			RelativePath: "a.md",
-			URLPrefix:    markup.TestRepoURL,
+			Links: markup.Links{
+				Base: markup.TestRepoURL,
+			},
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
@@ -238,7 +244,9 @@ func TestRender_email(t *testing.T) {
 		res, err := markup.RenderString(&markup.RenderContext{
 			Ctx:          git.DefaultContext,
 			RelativePath: "a.md",
-			URLPrefix:    markup.TestRepoURL,
+			Links: markup.Links{
+				Base: markup.TestRepoURL,
+			},
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(res))
@@ -309,7 +317,9 @@ func TestRender_emoji(t *testing.T) {
 		buffer, err := markup.RenderString(&markup.RenderContext{
 			Ctx:          git.DefaultContext,
 			RelativePath: "a.md",
-			URLPrefix:    markup.TestRepoURL,
+			Links: markup.Links{
+				Base: markup.TestRepoURL,
+			},
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
@@ -372,13 +382,18 @@ func TestRender_ShortLinks(t *testing.T) {
 	test := func(input, expected, expectedWiki string) {
 		buffer, err := markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: tree,
+			Links: markup.Links{
+				Base:       markup.TestRepoURL,
+				BranchPath: "master",
+			},
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
 		buffer, err = markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: markup.TestRepoURL,
+			Links: markup.Links{
+				Base: markup.TestRepoURL,
+			},
 			Metas:  localMetas,
 			IsWiki: true,
 		}, input)
@@ -386,14 +401,14 @@ func TestRender_ShortLinks(t *testing.T) {
 		assert.Equal(t, strings.TrimSpace(expectedWiki), strings.TrimSpace(buffer))
 	}
 
-	rawtree := util.URLJoin(markup.TestRepoURL, "raw", "master")
+	mediatree := util.URLJoin(markup.TestRepoURL, "media", "master")
 	url := util.URLJoin(tree, "Link")
 	otherURL := util.URLJoin(tree, "Other-Link")
 	encodedURL := util.URLJoin(tree, "Link%3F")
-	imgurl := util.URLJoin(rawtree, "Link.jpg")
-	otherImgurl := util.URLJoin(rawtree, "Link+Other.jpg")
-	encodedImgurl := util.URLJoin(rawtree, "Link+%23.jpg")
-	notencodedImgurl := util.URLJoin(rawtree, "some", "path", "Link+#.jpg")
+	imgurl := util.URLJoin(mediatree, "Link.jpg")
+	otherImgurl := util.URLJoin(mediatree, "Link+Other.jpg")
+	encodedImgurl := util.URLJoin(mediatree, "Link+%23.jpg")
+	notencodedImgurl := util.URLJoin(mediatree, "some", "path", "Link+#.jpg")
 	urlWiki := util.URLJoin(markup.TestRepoURL, "wiki", "Link")
 	otherURLWiki := util.URLJoin(markup.TestRepoURL, "wiki", "Other-Link")
 	encodedURLWiki := util.URLJoin(markup.TestRepoURL, "wiki", "Link%3F")
@@ -475,19 +490,23 @@ func TestRender_ShortLinks(t *testing.T) {
 
 func TestRender_RelativeImages(t *testing.T) {
 	setting.AppURL = markup.TestAppURL
-	tree := util.URLJoin(markup.TestRepoURL, "src", "master")
 
 	test := func(input, expected, expectedWiki string) {
 		buffer, err := markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: tree,
+			Links: markup.Links{
+				Base:       markup.TestRepoURL,
+				BranchPath: "master",
+			},
 			Metas: localMetas,
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
 		buffer, err = markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: markup.TestRepoURL,
+			Links: markup.Links{
+				Base: markup.TestRepoURL,
+			},
 			Metas:  localMetas,
 			IsWiki: true,
 		}, input)
@@ -522,7 +541,9 @@ func Test_ParseClusterFuzz(t *testing.T) {
 	var res strings.Builder
 	err := markup.PostProcess(&markup.RenderContext{
 		Ctx: git.DefaultContext,
-		URLPrefix: "https://example.com",
+		Links: markup.Links{
+			Base: "https://example.com",
+		},
 		Metas: localMetas,
 	}, strings.NewReader(data), &res)
 	assert.NoError(t, err)
@@ -533,7 +554,9 @@ func Test_ParseClusterFuzz(t *testing.T) {
 	res.Reset()
 	err = markup.PostProcess(&markup.RenderContext{
 		Ctx: git.DefaultContext,
-		URLPrefix: "https://example.com",
+		Links: markup.Links{
+			Base: "https://example.com",
+		},
 		Metas: localMetas,
 	}, strings.NewReader(data), &res)
 
@@ -543,6 +566,7 @@ func Test_ParseClusterFuzz(t *testing.T) {
 
 func TestPostProcess_RenderDocument(t *testing.T) {
 	setting.AppURL = markup.TestAppURL
+	setting.StaticURLPrefix = markup.TestAppURL // can't run standalone
 
 	localMetas := map[string]string{
 		"user": "go-gitea",
@@ -554,7 +578,9 @@ func TestPostProcess_RenderDocument(t *testing.T) {
 		var res strings.Builder
 		err := markup.PostProcess(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: "https://example.com",
+			Links: markup.Links{
+				Base: "https://example.com",
+			},
 			Metas: localMetas,
 		}, strings.NewReader(input), &res)
 		assert.NoError(t, err)
@@ -595,7 +621,6 @@ func TestIssue16020(t *testing.T) {
 	var res strings.Builder
 	err := markup.PostProcess(&markup.RenderContext{
 		Ctx:   git.DefaultContext,
-		URLPrefix: "https://example.com",
 		Metas: localMetas,
 	}, strings.NewReader(data), &res)
 	assert.NoError(t, err)
@@ -612,7 +637,6 @@ func BenchmarkEmojiPostprocess(b *testing.B) {
 		var res strings.Builder
 		err := markup.PostProcess(&markup.RenderContext{
 			Ctx:   git.DefaultContext,
-			URLPrefix: "https://example.com",
 			Metas: localMetas,
 		}, strings.NewReader(data), &res)
 		assert.NoError(b, err)
@@ -623,7 +647,9 @@ func TestFuzz(t *testing.T) {
 	s := "t/l/issues/8#/../../a"
 	renderContext := markup.RenderContext{
 		Ctx: git.DefaultContext,
-		URLPrefix: "https://example.com/go-gitea/gitea",
+		Links: markup.Links{
+			Base: "https://example.com/go-gitea/gitea",
+		},
 		Metas: map[string]string{
 			"user": "go-gitea",
 			"repo": "gitea",
@@ -641,7 +667,6 @@ func TestIssue18471(t *testing.T) {
 	var res strings.Builder
 	err := markup.PostProcess(&markup.RenderContext{
 		Ctx:   git.DefaultContext,
-		URLPrefix: "https://example.com",
 		Metas: localMetas,
 	}, strings.NewReader(data), &res)
 

modules/markup/markdown/goldmark.go

@@ -87,18 +87,8 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
 			// Check if the destination is a real link
 			link := v.Destination
 			if len(link) > 0 && !markup.IsLink(link) {
-				prefix := pc.Get(urlPrefixKey).(string)
-				if pc.Get(isWikiKey).(bool) {
-					prefix = giteautil.URLJoin(prefix, "wiki", "raw")
+				v.Destination = []byte(giteautil.URLJoin(ctx.Links.ResolveMediaLink(ctx.IsWiki), string(link)))
 			}
-				prefix = strings.Replace(prefix, "/src/", "/media/", 1)
-
-				lnk := strings.TrimLeft(string(link), "/")
-
-				lnk = giteautil.URLJoin(prefix, lnk)
-				link = []byte(lnk)
-			}
-			v.Destination = link
 
 			parent := n.Parent()
 			// Create a link around image only if parent is not already a link
@@ -107,7 +97,7 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
 
 				// Create a link wrapper
 				wrap := ast.NewLink()
-				wrap.Destination = link
+				wrap.Destination = v.Destination
 				wrap.Title = v.Title
 				wrap.SetAttributeString("target", []byte("_blank"))
 
@@ -143,11 +133,15 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
 				link[0] != '#' && !bytes.HasPrefix(link, byteMailto) {
 				// special case: this is not a link, a hash link or a mailto:, so it's a
 				// relative URL
-				lnk := string(link)
-				if pc.Get(isWikiKey).(bool) {
-					lnk = giteautil.URLJoin("wiki", lnk)
+
+				var base string
+				if ctx.IsWiki {
+					base = ctx.Links.WikiLink()
+				} else {
+					base = ctx.Links.Base
 				}
-				link = []byte(giteautil.URLJoin(pc.Get(urlPrefixKey).(string), lnk))
+
+				link = []byte(giteautil.URLJoin(base, string(link)))
 			}
 			if len(link) > 0 && link[0] == '#' {
 				link = []byte("#user-content-" + string(link)[1:])
@@ -188,9 +182,7 @@ func (g *ASTTransformer) Transform(node *ast.Document, reader text.Reader, pc pa
 			applyElementDir(v)
 		case *ast.Text:
 			if v.SoftLineBreak() && !v.HardLineBreak() {
-				renderMetas := pc.Get(renderMetasKey).(map[string]string)
-				mode := renderMetas["mode"]
-				if mode != "document" {
+				if ctx.Metas["mode"] != "document" {
 					v.SetHardLineBreak(setting.Markdown.EnableHardLineBreakInComments)
 				} else {
 					v.SetHardLineBreak(setting.Markdown.EnableHardLineBreakInDocuments)

modules/markup/markdown/markdown.go

@@ -34,9 +34,6 @@ var (
 )
 
 var (
-	urlPrefixKey     = parser.NewContextKey()
-	isWikiKey        = parser.NewContextKey()
-	renderMetasKey   = parser.NewContextKey()
 	renderContextKey = parser.NewContextKey()
 	renderConfigKey  = parser.NewContextKey()
 )
@@ -66,9 +63,6 @@ func (l *limitWriter) Write(data []byte) (int, error) {
 // newParserContext creates a parser.Context with the render context set
 func newParserContext(ctx *markup.RenderContext) parser.Context {
 	pc := parser.NewContext(parser.WithIDs(newPrefixedIDs()))
-	pc.Set(urlPrefixKey, ctx.URLPrefix)
-	pc.Set(isWikiKey, ctx.IsWiki)
-	pc.Set(renderMetasKey, ctx.Metas)
 	pc.Set(renderContextKey, ctx)
 	return pc
 }

modules/markup/markdown/markdown_test.go

@@ -53,14 +53,18 @@ func TestRender_StandardLinks(t *testing.T) {
 	test := func(input, expected, expectedWiki string) {
 		buffer, err := markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: setting.AppSubURL,
+			Links: markup.Links{
+				Base: setting.AppSubURL,
+			},
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
 
 		buffer, err = markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: setting.AppSubURL,
+			Links: markup.Links{
+				Base: setting.AppSubURL,
+			},
 			IsWiki: true,
 		}, input)
 		assert.NoError(t, err)
@@ -84,7 +88,9 @@ func TestRender_Images(t *testing.T) {
 	test := func(input, expected string) {
 		buffer, err := markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: setting.AppSubURL,
+			Links: markup.Links{
+				Base: setting.AppSubURL,
+			},
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
@@ -107,7 +113,6 @@ func TestRender_Images(t *testing.T) {
 		"[!["+title+"]("+url+")]("+href+")",
 		`<p><a href="`+href+`" rel="nofollow"><img src="`+result+`" alt="`+title+`"/></a></p>`)
 
-	url = "/../../.images/src/02/train.jpg"
 	test(
 		"!["+title+"]("+url+")",
 		`<p><a href="`+result+`" target="_blank" rel="nofollow noopener"><img src="`+result+`" alt="`+title+`"/></a></p>`)
@@ -286,12 +291,14 @@ func TestTotal_RenderWiki(t *testing.T) {
 	setting.AppURL = AppURL
 	setting.AppSubURL = AppSubURL
 
-	answers := testAnswers(util.URLJoin(AppSubURL, "wiki/"), util.URLJoin(AppSubURL, "wiki", "raw/"))
+	answers := testAnswers(util.URLJoin(AppSubURL, "wiki"), util.URLJoin(AppSubURL, "wiki", "raw"))
 
 	for i := 0; i < len(sameCases); i++ {
 		line, err := markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: AppSubURL,
+			Links: markup.Links{
+				Base: setting.AppSubURL,
+			},
 			Metas:  localMetas,
 			IsWiki: true,
 		}, sameCases[i])
@@ -315,7 +322,9 @@ func TestTotal_RenderWiki(t *testing.T) {
 	for i := 0; i < len(testCases); i += 2 {
 		line, err := markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: AppSubURL,
+			Links: markup.Links{
+				Base: setting.AppSubURL,
+			},
 			IsWiki: true,
 		}, testCases[i])
 		assert.NoError(t, err)
@@ -327,12 +336,15 @@ func TestTotal_RenderString(t *testing.T) {
 	setting.AppURL = AppURL
 	setting.AppSubURL = AppSubURL
 
-	answers := testAnswers(util.URLJoin(AppSubURL, "src", "master/"), util.URLJoin(AppSubURL, "raw", "master/"))
+	answers := testAnswers(util.URLJoin(AppSubURL, "src", "master"), util.URLJoin(AppSubURL, "media", "master"))
 
 	for i := 0; i < len(sameCases); i++ {
 		line, err := markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: util.URLJoin(AppSubURL, "src", "master/"),
+			Links: markup.Links{
+				Base:       AppSubURL,
+				BranchPath: "master",
+			},
 			Metas: localMetas,
 		}, sameCases[i])
 		assert.NoError(t, err)
@@ -344,7 +356,9 @@ func TestTotal_RenderString(t *testing.T) {
 	for i := 0; i < len(testCases); i += 2 {
 		line, err := markdown.RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: AppSubURL,
+			Links: markup.Links{
+				Base: AppSubURL,
+			},
 		}, testCases[i])
 		assert.NoError(t, err)
 		assert.Equal(t, testCases[i+1], line)
@@ -556,3 +570,367 @@ foo: bar
 		assert.Equal(t, test.expected, res, "Unexpected result in testcase %q", test.testcase)
 	}
 }
+
+func TestRenderLinks(t *testing.T) {
+	input := `  space @mention-user  
+/just/a/path.bin
+https://example.com/file.bin
+[local link](file.bin)
+[remote link](https://example.com)
+[[local link|file.bin]]
+[[remote link|https://example.com]]
+![local image](image.jpg)
+![remote image](https://example.com/image.jpg)
+[[local image|image.jpg]]
+[[remote link|https://example.com/image.jpg]]
+https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash
+com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
+https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb
+com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
+:+1:
+mail@domain.com
+@mention-user test
+#123
+  space  
+`
+	cases := []struct {
+		Links    markup.Links
+		IsWiki   bool
+		Expected string
+	}{
+		{ // 0
+			Links:  markup.Links{},
+			IsWiki: false,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/src/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/image.jpg" target="_blank" rel="nofollow noopener"><img src="/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 1
+			Links:  markup.Links{},
+			IsWiki: true,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="/wiki/raw/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 2
+			Links: markup.Links{
+				Base: "https://gitea.io/",
+			},
+			IsWiki: false,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="https://gitea.io/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="https://gitea.io/src/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="https://gitea.io/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://gitea.io/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 3
+			Links: markup.Links{
+				Base: "https://gitea.io/",
+			},
+			IsWiki: true,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="https://gitea.io/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="https://gitea.io/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="https://gitea.io/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://gitea.io/wiki/raw/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 4
+			Links: markup.Links{
+				Base: "/relative/path",
+			},
+			IsWiki: false,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="/relative/path/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/relative/path/src/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/relative/path/image.jpg" target="_blank" rel="nofollow noopener"><img src="/relative/path/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 5
+			Links: markup.Links{
+				Base: "/relative/path",
+			},
+			IsWiki: true,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/relative/path/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 6
+			Links: markup.Links{
+				Base:       "/user/repo",
+				BranchPath: "branch/main",
+			},
+			IsWiki: false,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="/user/repo/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/user/repo/src/branch/main/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/user/repo/media/branch/main/image.jpg" target="_blank" rel="nofollow noopener"><img src="/user/repo/media/branch/main/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 7
+			Links: markup.Links{
+				Base:       "/relative/path",
+				BranchPath: "branch/main",
+			},
+			IsWiki: true,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/relative/path/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 8
+			Links: markup.Links{
+				Base:     "/user/repo",
+				TreePath: "sub/folder",
+			},
+			IsWiki: false,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="/user/repo/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/user/repo/src/sub/folder/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/user/repo/image.jpg" target="_blank" rel="nofollow noopener"><img src="/user/repo/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 9
+			Links: markup.Links{
+				Base:     "/relative/path",
+				TreePath: "sub/folder",
+			},
+			IsWiki: true,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/relative/path/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 10
+			Links: markup.Links{
+				Base:       "/user/repo",
+				BranchPath: "branch/main",
+				TreePath:   "sub/folder",
+			},
+			IsWiki: false,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="/user/repo/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/user/repo/src/branch/main/sub/folder/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/user/repo/media/branch/main/sub/folder/image.jpg" target="_blank" rel="nofollow noopener"><img src="/user/repo/media/branch/main/sub/folder/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+		{ // 11
+			Links: markup.Links{
+				Base:       "/relative/path",
+				BranchPath: "branch/main",
+				TreePath:   "sub/folder",
+			},
+			IsWiki: true,
+			Expected: `<p>space @mention-user<br/>
+/just/a/path.bin<br/>
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
+<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
+<a href="https://example.com" rel="nofollow">remote link</a><br/>
+<a href="/relative/path/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/image.jpg" alt="local image"/></a><br/>
+<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/>
+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/>
+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/>
+@mention-user test<br/>
+#123<br/>
+space</p>
+`,
+		},
+	}
+
+	for i, c := range cases {
+		result, err := markdown.RenderString(&markup.RenderContext{Ctx: context.Background(), Links: c.Links, IsWiki: c.IsWiki}, input)
+		assert.NoError(t, err, "Unexpected error in testcase: %v", i)
+		assert.Equal(t, c.Expected, result, "Unexpected result in testcase %v", i)
+	}
+}

modules/markup/orgmode/orgmode.go

@@ -4,7 +4,6 @@
 package markup
 
 import (
-	"bytes"
 	"fmt"
 	"html"
 	"io"
@@ -101,8 +100,7 @@ func Render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error
 
 	w := &Writer{
 		HTMLWriter: htmlWriter,
-		URLPrefix:  ctx.URLPrefix,
-		IsWiki:     ctx.IsWiki,
+		Ctx:        ctx,
 	}
 
 	htmlWriter.ExtendingWriter = w
@@ -132,63 +130,53 @@ func (Renderer) Render(ctx *markup.RenderContext, input io.Reader, output io.Wri
 // Writer implements org.Writer
 type Writer struct {
 	*org.HTMLWriter
-	URLPrefix string
-	IsWiki    bool
+	Ctx *markup.RenderContext
 }
 
-var byteMailto = []byte("mailto:")
+const mailto = "mailto:"
 
-// WriteRegularLink renders images, links or videos
-func (r *Writer) WriteRegularLink(l org.RegularLink) {
-	link := []byte(html.EscapeString(l.URL))
+func (r *Writer) resolveLink(l org.RegularLink) string {
+	link := html.EscapeString(l.URL)
 	if l.Protocol == "file" {
 		link = link[len("file:"):]
 	}
-	if len(link) > 0 && !markup.IsLink(link) &&
-		link[0] != '#' && !bytes.HasPrefix(link, byteMailto) {
-		lnk := string(link)
-		if r.IsWiki {
-			lnk = util.URLJoin("wiki", lnk)
+	if len(link) > 0 && !markup.IsLinkStr(link) &&
+		link[0] != '#' && !strings.HasPrefix(link, mailto) {
+		base := r.Ctx.Links.Base
+		switch l.Kind() {
+		case "image", "video":
+			base = r.Ctx.Links.ResolveMediaLink(r.Ctx.IsWiki)
 		}
-		link = []byte(util.URLJoin(r.URLPrefix, lnk))
+		link = util.URLJoin(base, link)
 	}
+	return link
+}
+
+// WriteRegularLink renders images, links or videos
+func (r *Writer) WriteRegularLink(l org.RegularLink) {
+	link := r.resolveLink(l)
 
 	// Inspired by https://github.com/niklasfasching/go-org/blob/6eb20dbda93cb88c3503f7508dc78cbbc639378f/org/html_writer.go#L406-L427
 	switch l.Kind() {
 	case "image":
 		if l.Description == nil {
-			imageSrc := getMediaURL(link)
-			fmt.Fprintf(r, `<img src="%s" alt="%s" />`, imageSrc, link)
+			fmt.Fprintf(r, `<img src="%s" alt="%s" />`, link, link)
 		} else {
-			description := strings.TrimPrefix(org.String(l.Description...), "file:")
-			imageSrc := getMediaURL([]byte(description))
+			imageSrc := r.resolveLink(l.Description[0].(org.RegularLink))
 			fmt.Fprintf(r, `<a href="%s"><img src="%s" alt="%s" /></a>`, link, imageSrc, imageSrc)
 		}
 	case "video":
 		if l.Description == nil {
-			imageSrc := getMediaURL(link)
-			fmt.Fprintf(r, `<video src="%s">%s</video>`, imageSrc, link)
+			fmt.Fprintf(r, `<video src="%s">%s</video>`, link, link)
 		} else {
-			description := strings.TrimPrefix(org.String(l.Description...), "file:")
-			videoSrc := getMediaURL([]byte(description))
+			videoSrc := r.resolveLink(l.Description[0].(org.RegularLink))
 			fmt.Fprintf(r, `<a href="%s"><video src="%s">%s</video></a>`, link, videoSrc, videoSrc)
 		}
 	default:
-		description := string(link)
+		description := link
 		if l.Description != nil {
 			description = r.WriteNodesAsString(l.Description...)
 		}
 		fmt.Fprintf(r, `<a href="%s">%s</a>`, link, description)
 	}
 }
-
-func getMediaURL(l []byte) string {
-	srcURL := string(l)
-
-	// Check if link is valid
-	if len(srcURL) > 0 && !markup.IsLink(l) {
-		srcURL = strings.Replace(srcURL, "/src/", "/media/", 1)
-	}
-
-	return srcURL
-}

modules/markup/orgmode/orgmode_test.go

@@ -28,7 +28,9 @@ func TestRender_StandardLinks(t *testing.T) {
 	test := func(input, expected string) {
 		buffer, err := RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: setting.AppSubURL,
+			Links: markup.Links{
+				Base: setting.AppSubURL,
+			},
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
@@ -49,7 +51,9 @@ func TestRender_Media(t *testing.T) {
 	test := func(input, expected string) {
 		buffer, err := RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: setting.AppSubURL,
+			Links: markup.Links{
+				Base: setting.AppSubURL,
+			},
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
@@ -85,7 +89,6 @@ func TestRender_Source(t *testing.T) {
 	test := func(input, expected string) {
 		buffer, err := RenderString(&markup.RenderContext{
 			Ctx: git.DefaultContext,
-			URLPrefix: setting.AppSubURL,
 		}, input)
 		assert.NoError(t, err)
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))

modules/markup/renderer.go

@@ -16,6 +16,7 @@ import (
 
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
 
 	"github.com/yuin/goldmark/ast"
 )
@@ -69,7 +70,7 @@ type RenderContext struct {
 	RelativePath     string // relative path from tree root of the branch
 	Type             string
 	IsWiki           bool
-	URLPrefix        string
+	Links            Links
 	Metas            map[string]string
 	DefaultLink      string
 	GitRepo          *git.Repository
@@ -80,6 +81,45 @@ type RenderContext struct {
 	InStandalonePage bool // used by external render. the router "/org/repo/render/..." will output the rendered content in a standalone page
 }
 
+type Links struct {
+	Base       string
+	BranchPath string
+	TreePath   string
+}
+
+func (l *Links) HasBranchInfo() bool {
+	return l.BranchPath != ""
+}
+
+func (l *Links) SrcLink() string {
+	return util.URLJoin(l.Base, "src", l.BranchPath, l.TreePath)
+}
+
+func (l *Links) MediaLink() string {
+	return util.URLJoin(l.Base, "media", l.BranchPath, l.TreePath)
+}
+
+func (l *Links) RawLink() string {
+	return util.URLJoin(l.Base, "raw", l.BranchPath, l.TreePath)
+}
+
+func (l *Links) WikiLink() string {
+	return util.URLJoin(l.Base, "wiki")
+}
+
+func (l *Links) WikiRawLink() string {
+	return util.URLJoin(l.Base, "wiki/raw")
+}
+
+func (l *Links) ResolveMediaLink(isWiki bool) string {
+	if isWiki {
+		return l.WikiRawLink()
+	} else if l.HasBranchInfo() {
+		return l.MediaLink()
+	}
+	return l.Base
+}
+
 // Cancel runs any cleanup functions that have been registered for this Ctx
 func (ctx *RenderContext) Cancel() {
 	if ctx == nil {

modules/templates/helper.go

@@ -161,7 +161,6 @@ func NewFuncMap() template.FuncMap {
 		"RenderEmoji":      RenderEmoji,
 		"RenderEmojiPlain": emoji.ReplaceAliases,
 		"ReactionToEmoji":  ReactionToEmoji,
-		"RenderNote":       RenderNote,
 
 		"RenderMarkdownToHtml": RenderMarkdownToHtml,
 		"RenderLabel":          RenderLabel,

modules/templates/util_render.go

@@ -24,20 +24,12 @@ import (
 )
 
 // RenderCommitMessage renders commit message with XSS-safe and special links.
-func RenderCommitMessage(ctx context.Context, msg, urlPrefix string, metas map[string]string) template.HTML {
-	return RenderCommitMessageLink(ctx, msg, urlPrefix, "", metas)
-}
-
-// RenderCommitMessageLink renders commit message as a XXS-safe link to the provided
-// default url, handling for special links.
-func RenderCommitMessageLink(ctx context.Context, msg, urlPrefix, urlDefault string, metas map[string]string) template.HTML {
+func RenderCommitMessage(ctx context.Context, msg string, metas map[string]string) template.HTML {
 	cleanMsg := template.HTMLEscapeString(msg)
 	// we can safely assume that it will not return any error, since there
 	// shouldn't be any special HTML.
 	fullMessage, err := markup.RenderCommitMessage(&markup.RenderContext{
 		Ctx:   ctx,
-		URLPrefix:   urlPrefix,
-		DefaultLink: urlDefault,
 		Metas: metas,
 	}, cleanMsg)
 	if err != nil {
@@ -51,9 +43,9 @@ func RenderCommitMessageLink(ctx context.Context, msg, urlPrefix, urlDefault str
 	return template.HTML(msgLines[0])
 }
 
-// RenderCommitMessageLinkSubject renders commit message as a XXS-safe link to
+// RenderCommitMessageLinkSubject renders commit message as a XSS-safe link to
 // the provided default url, handling for special links without email to links.
-func RenderCommitMessageLinkSubject(ctx context.Context, msg, urlPrefix, urlDefault string, metas map[string]string) template.HTML {
+func RenderCommitMessageLinkSubject(ctx context.Context, msg, urlDefault string, metas map[string]string) template.HTML {
 	msgLine := strings.TrimLeftFunc(msg, unicode.IsSpace)
 	lineEnd := strings.IndexByte(msgLine, '\n')
 	if lineEnd > 0 {
@@ -68,7 +60,6 @@ func RenderCommitMessageLinkSubject(ctx context.Context, msg, urlPrefix, urlDefa
 	// shouldn't be any special HTML.
 	renderedMessage, err := markup.RenderCommitMessageSubject(&markup.RenderContext{
 		Ctx:         ctx,
-		URLPrefix:   urlPrefix,
 		DefaultLink: urlDefault,
 		Metas:       metas,
 	}, template.HTMLEscapeString(msgLine))
@@ -80,7 +71,7 @@ func RenderCommitMessageLinkSubject(ctx context.Context, msg, urlPrefix, urlDefa
 }
 
 // RenderCommitBody extracts the body of a commit message without its title.
-func RenderCommitBody(ctx context.Context, msg, urlPrefix string, metas map[string]string) template.HTML {
+func RenderCommitBody(ctx context.Context, msg string, metas map[string]string) template.HTML {
 	msgLine := strings.TrimSpace(msg)
 	lineEnd := strings.IndexByte(msgLine, '\n')
 	if lineEnd > 0 {
@@ -95,7 +86,6 @@ func RenderCommitBody(ctx context.Context, msg, urlPrefix string, metas map[stri
 
 	renderedMessage, err := markup.RenderCommitMessage(&markup.RenderContext{
 		Ctx:   ctx,
-		URLPrefix: urlPrefix,
 		Metas: metas,
 	}, template.HTMLEscapeString(msgLine))
 	if err != nil {
@@ -115,10 +105,9 @@ func RenderCodeBlock(htmlEscapedTextToRender template.HTML) template.HTML {
 }
 
 // RenderIssueTitle renders issue/pull title with defined post processors
-func RenderIssueTitle(ctx context.Context, text, urlPrefix string, metas map[string]string) template.HTML {
+func RenderIssueTitle(ctx context.Context, text string, metas map[string]string) template.HTML {
 	renderedText, err := markup.RenderIssueTitle(&markup.RenderContext{
 		Ctx:   ctx,
-		URLPrefix: urlPrefix,
 		Metas: metas,
 	}, template.HTMLEscapeString(text))
 	if err != nil {
@@ -211,25 +200,9 @@ func ReactionToEmoji(reaction string) template.HTML {
 	return template.HTML(fmt.Sprintf(`<img alt=":%s:" src="%s/assets/img/emoji/%s.png"></img>`, reaction, setting.StaticURLPrefix, url.PathEscape(reaction)))
 }
 
-// RenderNote renders the contents of a git-notes file as a commit message.
-func RenderNote(ctx context.Context, msg, urlPrefix string, metas map[string]string) template.HTML {
-	cleanMsg := template.HTMLEscapeString(msg)
-	fullMessage, err := markup.RenderCommitMessage(&markup.RenderContext{
-		Ctx:       ctx,
-		URLPrefix: urlPrefix,
-		Metas:     metas,
-	}, cleanMsg)
-	if err != nil {
-		log.Error("RenderNote: %v", err)
-		return ""
-	}
-	return template.HTML(fullMessage)
-}
-
 func RenderMarkdownToHtml(ctx context.Context, input string) template.HTML { //nolint:revive
 	output, err := markdown.RenderString(&markup.RenderContext{
 		Ctx:   ctx,
-		URLPrefix: setting.AppSubURL,
 		Metas: map[string]string{"mode": "document"},
 	}, input)
 	if err != nil {

modules/templates/util_render_test.go

@@ -6,16 +6,63 @@ package templates
 import (
 	"context"
 	"html/template"
+	"os"
 	"testing"
 
+	"code.gitea.io/gitea/models/unittest"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/markup"
+
 	"github.com/stretchr/testify/assert"
 )
 
+const testInput = `  space @mention-user  
+/just/a/path.bin
+https://example.com/file.bin
+[local link](file.bin)
+[remote link](https://example.com)
+[[local link|file.bin]]
+[[remote link|https://example.com]]
+![local image](image.jpg)
+![remote image](https://example.com/image.jpg)
+[[local image|image.jpg]]
+[[remote link|https://example.com/image.jpg]]
+https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash
+com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
+https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb
+com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
+:+1:
+mail@domain.com
+@mention-user test
+#123
+  space  
+`
+
+var testMetas = map[string]string{
+	"user":     "user13",
+	"repo":     "repo11",
+	"repoPath": "../../tests/gitea-repositories-meta/user13/repo11.git/",
+	"mode":     "comment",
+}
+
+func TestMain(m *testing.M) {
+	unittest.InitSettings()
+	if err := git.InitSimple(context.Background()); err != nil {
+		log.Fatal("git init failed, err: %v", err)
+	}
+	markup.Init(&markup.ProcessorHelper{
+		IsUsernameMentionable: func(ctx context.Context, username string) bool {
+			return username == "mention-user"
+		},
+	})
+	os.Exit(m.Run())
+}
+
 func TestRenderCommitBody(t *testing.T) {
 	type args struct {
 		ctx   context.Context
 		msg   string
-		urlPrefix string
 		metas map[string]string
 	}
 	tests := []struct {
@@ -50,7 +97,91 @@ func TestRenderCommitBody(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			assert.Equalf(t, tt.want, RenderCommitBody(tt.args.ctx, tt.args.msg, tt.args.urlPrefix, tt.args.metas), "RenderCommitBody(%v, %v, %v, %v)", tt.args.ctx, tt.args.msg, tt.args.urlPrefix, tt.args.metas)
+			assert.Equalf(t, tt.want, RenderCommitBody(tt.args.ctx, tt.args.msg, tt.args.metas), "RenderCommitBody(%v, %v, %v)", tt.args.ctx, tt.args.msg, tt.args.metas)
 		})
 	}
+
+	expected := `/just/a/path.bin
+<a href="https://example.com/file.bin" class="link">https://example.com/file.bin</a>
+[local link](file.bin)
+[remote link](<a href="https://example.com" class="link">https://example.com</a>)
+[[local link|file.bin]]
+[[remote link|<a href="https://example.com" class="link">https://example.com</a>]]
+![local image](image.jpg)
+![remote image](<a href="https://example.com/image.jpg" class="link">https://example.com/image.jpg</a>)
+[[local image|image.jpg]]
+[[remote link|<a href="https://example.com/image.jpg" class="link">https://example.com/image.jpg</a>]]
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" class="compare"><code class="nohighlight">88fc37a3c0...12fc37a3c0 (hash)</code></a>
+com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" class="commit"><code class="nohighlight">88fc37a3c0</code></a>
+com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
+<span class="emoji" aria-label="thumbs up">👍</span>
+<a href="mailto:mail@domain.com" class="mailto">mail@domain.com</a>
+<a href="http://localhost:3000/mention-user" class="mention">@mention-user</a> test
+<a href="http://localhost:3000/user13/repo11/issues/123" class="ref-issue">#123</a>
+  space`
+
+	assert.EqualValues(t, expected, RenderCommitBody(context.Background(), testInput, testMetas))
+}
+
+func TestRenderCommitMessage(t *testing.T) {
+	expected := `space <a href="http://localhost:3000/mention-user" class="mention">@mention-user</a>  `
+
+	assert.EqualValues(t, expected, RenderCommitMessage(context.Background(), testInput, testMetas))
+}
+
+func TestRenderCommitMessageLinkSubject(t *testing.T) {
+	expected := `<a href="https://example.com/link" class="default-link muted">space </a><a href="http://localhost:3000/mention-user" class="mention">@mention-user</a>`
+
+	assert.EqualValues(t, expected, RenderCommitMessageLinkSubject(context.Background(), testInput, "https://example.com/link", testMetas))
+}
+
+func TestRenderIssueTitle(t *testing.T) {
+	expected := `  space @mention-user  
+/just/a/path.bin
+https://example.com/file.bin
+[local link](file.bin)
+[remote link](https://example.com)
+[[local link|file.bin]]
+[[remote link|https://example.com]]
+![local image](image.jpg)
+![remote image](https://example.com/image.jpg)
+[[local image|image.jpg]]
+[[remote link|https://example.com/image.jpg]]
+https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash
+com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
+https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb
+com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
+<span class="emoji" aria-label="thumbs up">👍</span>
+mail@domain.com
+@mention-user test
+<a href="http://localhost:3000/user13/repo11/issues/123" class="ref-issue">#123</a>
+  space  
+`
+	assert.EqualValues(t, expected, RenderIssueTitle(context.Background(), testInput, testMetas))
+}
+
+func TestRenderMarkdownToHtml(t *testing.T) {
+	expected := `<p>space <a href="http://localhost:3000/mention-user" rel="nofollow">@mention-user</a><br/>
+/just/a/path.bin
+<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a>
+<a href="/file.bin" rel="nofollow">local link</a>
+<a href="https://example.com" rel="nofollow">remote link</a>
+<a href="/src/file.bin" rel="nofollow">local link</a>
+<a href="https://example.com" rel="nofollow">remote link</a>
+<a href="/image.jpg" target="_blank" rel="nofollow noopener"><img src="/image.jpg" alt="local image"/></a>
+<a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a>
+<a href="/image.jpg" rel="nofollow"><img src="/image.jpg" title="local image" alt="local image"/></a>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a>
+<a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a>
+com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
+<a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a>
+com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
+<span class="emoji" aria-label="thumbs up">👍</span>
+<a href="mailto:mail@domain.com" rel="nofollow">mail@domain.com</a>
+<a href="http://localhost:3000/mention-user" rel="nofollow">@mention-user</a> test
+#123
+space</p>
+`
+	assert.EqualValues(t, expected, RenderMarkdownToHtml(context.Background(), testInput))
 }

routers/common/markup.go

@@ -33,7 +33,9 @@ func RenderMarkup(ctx *context.Base, repo *context.Repository, mode, text, urlPr
 		// Raw markdown
 		if err := markdown.RenderRaw(&markup.RenderContext{
 			Ctx: ctx,
-			URLPrefix: urlPrefix,
+			Links: markup.Links{
+				Base: urlPrefix,
+			},
 		}, strings.NewReader(text), ctx.Resp); err != nil {
 			ctx.Error(http.StatusInternalServerError, err.Error())
 		}
@@ -76,7 +78,9 @@ func RenderMarkup(ctx *context.Base, repo *context.Repository, mode, text, urlPr
 
 	if err := markup.Render(&markup.RenderContext{
 		Ctx: ctx,
-		URLPrefix:    urlPrefix,
+		Links: markup.Links{
+			Base: urlPrefix,
+		},
 		Metas:        meta,
 		IsWiki:       wiki,
 		Type:         markupType,

routers/web/feed/convert.go

@@ -52,7 +52,9 @@ func toReleaseLink(ctx *context.Context, act *activities_model.Action) string {
 func renderMarkdown(ctx *context.Context, act *activities_model.Action, content string) string {
 	markdownCtx := &markup.RenderContext{
 		Ctx: ctx,
-		URLPrefix: act.GetRepoLink(ctx),
+		Links: markup.Links{
+			Base: act.GetRepoLink(ctx),
+		},
 		Type: markdown.MarkupName,
 		Metas: map[string]string{
 			"user": act.GetRepoUserName(ctx),
@@ -199,7 +201,6 @@ func feedActionsToFeedItems(ctx *context.Context, actions activities_model.Actio
 			switch act.OpType {
 			case activities_model.ActionCommitRepo, activities_model.ActionMirrorSyncPush:
 				push := templates.ActionContent2Commits(act)
-				repoLink := act.GetRepoAbsoluteLink(ctx)
 
 				for _, commit := range push.Commits {
 					if len(desc) != 0 {
@@ -208,7 +209,7 @@ func feedActionsToFeedItems(ctx *context.Context, actions activities_model.Actio
 					desc += fmt.Sprintf("<a href=\"%s\">%s</a>\n%s",
 						html.EscapeString(fmt.Sprintf("%s/commit/%s", act.GetRepoAbsoluteLink(ctx), commit.Sha1)),
 						commit.Sha1,
-						templates.RenderCommitMessage(ctx, commit.Message, repoLink, nil),
+						templates.RenderCommitMessage(ctx, commit.Message, nil),
 					)
 				}
 
@@ -289,7 +290,9 @@ func releasesToFeedItems(ctx *context.Context, releases []*repo_model.Release, i
 		link := &feeds.Link{Href: rel.HTMLURL()}
 		content, err = markdown.RenderString(&markup.RenderContext{
 			Ctx: ctx,
-			URLPrefix: rel.Repo.Link(),
+			Links: markup.Links{
+				Base: rel.Repo.Link(),
+			},
 			Metas: rel.Repo.ComposeMetas(ctx),
 		}, rel.Note)
 

routers/web/feed/profile.go

@@ -43,7 +43,9 @@ func showUserFeed(ctx *context.Context, formatType string) {
 
 	ctxUserDescription, err := markdown.RenderString(&markup.RenderContext{
 		Ctx: ctx,
-		URLPrefix: ctx.ContextUser.HTMLURL(),
+		Links: markup.Links{
+			Base: ctx.ContextUser.HTMLURL(),
+		},
 		Metas: map[string]string{
 			"user": ctx.ContextUser.GetDisplayName(),
 		},

routers/web/org/home.go

@@ -5,6 +5,7 @@ package org
 
 import (
 	"net/http"
+	"path"
 	"strings"
 
 	"code.gitea.io/gitea/models/db"
@@ -48,9 +49,7 @@ func Home(ctx *context.Context) {
 	if len(org.Description) != 0 {
 		desc, err := markdown.RenderString(&markup.RenderContext{
 			Ctx:   ctx,
-			URLPrefix: ctx.Repo.RepoLink,
 			Metas: map[string]string{"mode": "document"},
-			GitRepo:   ctx.Repo.GitRepo,
 		}, org.Description)
 		if err != nil {
 			ctx.ServerError("RenderString", err)
@@ -173,13 +172,15 @@ func prepareOrgProfileReadme(ctx *context.Context, profileGitRepo *git.Repositor
 	if bytes, err := profileReadme.GetBlobContent(setting.UI.MaxDisplayFileSize); err != nil {
 		log.Error("failed to GetBlobContent: %v", err)
 	} else {
-		// Pass URLPrefix to markdown render for the full link of media elements.
-		// The profile of default branch would be shown.
-		prefix := profileDbRepo.Link() + "/src/branch/" + util.PathEscapeSegments(profileDbRepo.DefaultBranch)
 		if profileContent, err := markdown.RenderString(&markup.RenderContext{
 			Ctx:     ctx,
 			GitRepo: profileGitRepo,
-			URLPrefix: prefix,
+			Links: markup.Links{
+				// Pass repo link to markdown render for the full link of media elements.
+				// The profile of default branch would be shown.
+				Base:       profileDbRepo.Link(),
+				BranchPath: path.Join("branch", util.PathEscapeSegments(profileDbRepo.DefaultBranch)),
+			},
 			Metas: map[string]string{"mode": "document"},
 		}, bytes); err != nil {
 			log.Error("failed to RenderString: %v", err)

routers/web/repo/commit.go

@@ -7,7 +7,9 @@ package repo
 import (
 	"errors"
 	"fmt"
+	"html/template"
 	"net/http"
+	"path"
 	"strings"
 
 	asymkey_model "code.gitea.io/gitea/models/asymkey"
@@ -21,7 +23,9 @@ import (
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/gitgraph"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/services/gitdiff"
 	git_service "code.gitea.io/gitea/services/repository"
 )
@@ -370,9 +374,21 @@ func Diff(ctx *context.Context) {
 	note := &git.Note{}
 	err = git.GetNote(ctx, ctx.Repo.GitRepo, commitID, note)
 	if err == nil {
-		ctx.Data["Note"] = string(charset.ToUTF8WithFallback(note.Message))
 		ctx.Data["NoteCommit"] = note.Commit
 		ctx.Data["NoteAuthor"] = user_model.ValidateCommitWithEmail(ctx, note.Commit)
+		ctx.Data["NoteRendered"], err = markup.RenderCommitMessage(&markup.RenderContext{
+			Links: markup.Links{
+				Base:       ctx.Repo.RepoLink,
+				BranchPath: path.Join("commit", util.PathEscapeSegments(commitID)),
+			},
+			Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
+			GitRepo: ctx.Repo.GitRepo,
+			Ctx:     ctx,
+		}, template.HTMLEscapeString(string(charset.ToUTF8WithFallback(note.Message))))
+		if err != nil {
+			ctx.ServerError("RenderCommitMessage", err)
+			return
+		}
 	}
 
 	ctx.Data["BranchName"], err = commit.GetBranchName()

routers/web/repo/issue.go

@@ -1436,9 +1436,10 @@ func ViewIssue(ctx *context.Context) {
 		}
 	}
 	ctx.Data["IssueWatch"] = iw
-
 	issue.RenderedContent, err = markdown.RenderString(&markup.RenderContext{
-		URLPrefix: ctx.Repo.RepoLink,
+		Links: markup.Links{
+			Base: ctx.Repo.RepoLink,
+		},
 		Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 		GitRepo: ctx.Repo.GitRepo,
 		Ctx:     ctx,
@@ -1601,7 +1602,9 @@ func ViewIssue(ctx *context.Context) {
 			}
 
 			comment.RenderedContent, err = markdown.RenderString(&markup.RenderContext{
-				URLPrefix: ctx.Repo.RepoLink,
+				Links: markup.Links{
+					Base: ctx.Repo.RepoLink,
+				},
 				Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 				GitRepo: ctx.Repo.GitRepo,
 				Ctx:     ctx,
@@ -1678,7 +1681,9 @@ func ViewIssue(ctx *context.Context) {
 			}
 		} else if comment.Type.HasContentSupport() {
 			comment.RenderedContent, err = markdown.RenderString(&markup.RenderContext{
-				URLPrefix: ctx.Repo.RepoLink,
+				Links: markup.Links{
+					Base: ctx.Repo.RepoLink,
+				},
 				Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 				GitRepo: ctx.Repo.GitRepo,
 				Ctx:     ctx,
@@ -2234,7 +2239,9 @@ func UpdateIssueContent(ctx *context.Context) {
 	}
 
 	content, err := markdown.RenderString(&markup.RenderContext{
-		URLPrefix: ctx.FormString("context"), // FIXME: <- IS THIS SAFE ?
+		Links: markup.Links{
+			Base: ctx.FormString("context"), // FIXME: <- IS THIS SAFE ?
+		},
 		Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 		GitRepo: ctx.Repo.GitRepo,
 		Ctx:     ctx,
@@ -3143,7 +3150,9 @@ func UpdateCommentContent(ctx *context.Context) {
 	}
 
 	content, err := markdown.RenderString(&markup.RenderContext{
-		URLPrefix: ctx.FormString("context"), // FIXME: <- IS THIS SAFE ?
+		Links: markup.Links{
+			Base: ctx.FormString("context"), // FIXME: <- IS THIS SAFE ?
+		},
 		Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 		GitRepo: ctx.Repo.GitRepo,
 		Ctx:     ctx,

routers/web/repo/milestone.go

@@ -81,7 +81,9 @@ func Milestones(ctx *context.Context) {
 	}
 	for _, m := range miles {
 		m.RenderedContent, err = markdown.RenderString(&markup.RenderContext{
-			URLPrefix: ctx.Repo.RepoLink,
+			Links: markup.Links{
+				Base: ctx.Repo.RepoLink,
+			},
 			Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 			GitRepo: ctx.Repo.GitRepo,
 			Ctx:     ctx,
@@ -275,7 +277,9 @@ func MilestoneIssuesAndPulls(ctx *context.Context) {
 	}
 
 	milestone.RenderedContent, err = markdown.RenderString(&markup.RenderContext{
-		URLPrefix: ctx.Repo.RepoLink,
+		Links: markup.Links{
+			Base: ctx.Repo.RepoLink,
+		},
 		Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 		GitRepo: ctx.Repo.GitRepo,
 		Ctx:     ctx,

routers/web/repo/projects.go

@@ -90,7 +90,9 @@ func Projects(ctx *context.Context) {
 
 	for i := range projects {
 		projects[i].RenderedContent, err = markdown.RenderString(&markup.RenderContext{
-			URLPrefix: ctx.Repo.RepoLink,
+			Links: markup.Links{
+				Base: ctx.Repo.RepoLink,
+			},
 			Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 			GitRepo: ctx.Repo.GitRepo,
 			Ctx:     ctx,
@@ -357,7 +359,9 @@ func ViewProject(ctx *context.Context) {
 	ctx.Data["LinkedPRs"] = linkedPrsMap
 
 	project.RenderedContent, err = markdown.RenderString(&markup.RenderContext{
-		URLPrefix: ctx.Repo.RepoLink,
+		Links: markup.Links{
+			Base: ctx.Repo.RepoLink,
+		},
 		Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 		GitRepo: ctx.Repo.GitRepo,
 		Ctx:     ctx,

routers/web/repo/release.go

@@ -136,7 +136,9 @@ func Releases(ctx *context.Context) {
 		}
 
 		r.Note, err = markdown.RenderString(&markup.RenderContext{
-			URLPrefix: ctx.Repo.RepoLink,
+			Links: markup.Links{
+				Base: ctx.Repo.RepoLink,
+			},
 			Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 			GitRepo: ctx.Repo.GitRepo,
 			Ctx:     ctx,
@@ -287,7 +289,9 @@ func SingleRelease(ctx *context.Context) {
 		}
 	}
 	release.Note, err = markdown.RenderString(&markup.RenderContext{
-		URLPrefix: ctx.Repo.RepoLink,
+		Links: markup.Links{
+			Base: ctx.Repo.RepoLink,
+		},
 		Metas:   ctx.Repo.Repository.ComposeMetas(ctx),
 		GitRepo: ctx.Repo.GitRepo,
 		Ctx:     ctx,

routers/web/repo/render.go

@@ -57,16 +57,15 @@ func RenderFile(ctx *context.Context) {
 		return
 	}
 
-	treeLink := ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL()
-	if ctx.Repo.TreePath != "" {
-		treeLink += "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
-	}
-
 	ctx.Resp.Header().Add("Content-Security-Policy", "frame-src 'self'; sandbox allow-scripts")
 	err = markup.Render(&markup.RenderContext{
 		Ctx:          ctx,
 		RelativePath: ctx.Repo.TreePath,
-		URLPrefix:        path.Dir(treeLink),
+		Links: markup.Links{
+			Base:       ctx.Repo.RepoLink,
+			BranchPath: ctx.Repo.BranchNameSubURL(),
+			TreePath:   path.Dir(ctx.Repo.TreePath),
+		},
 		Metas:            ctx.Repo.Repository.ComposeDocumentMetas(ctx),
 		GitRepo:          ctx.Repo.GitRepo,
 		InStandalonePage: true,

routers/web/repo/view.go

@@ -158,7 +158,7 @@ func findReadmeFileInEntries(ctx *context.Context, entries []*git.TreeEntry, try
 	return "", readmeFile, nil
 }
 
-func renderDirectory(ctx *context.Context, treeLink string) {
+func renderDirectory(ctx *context.Context) {
 	entries := renderDirectoryFiles(ctx, 1*time.Second)
 	if ctx.Written() {
 		return
@@ -175,7 +175,7 @@ func renderDirectory(ctx *context.Context, treeLink string) {
 		return
 	}
 
-	renderReadmeFile(ctx, subfolder, readmeFile, treeLink)
+	renderReadmeFile(ctx, subfolder, readmeFile)
 }
 
 // localizedExtensions prepends the provided language code with and without a
@@ -259,7 +259,7 @@ func getFileReader(ctx gocontext.Context, repoID int64, blob *git.Blob) ([]byte,
 	return buf, dataRc, &fileInfo{st.IsText(), true, meta.Size, &meta.Pointer, st}, nil
 }
 
-func renderReadmeFile(ctx *context.Context, subfolder string, readmeFile *git.TreeEntry, readmeTreelink string) {
+func renderReadmeFile(ctx *context.Context, subfolder string, readmeFile *git.TreeEntry) {
 	target := readmeFile
 	if readmeFile != nil && readmeFile.IsLink() {
 		target, _ = readmeFile.FollowLinks()
@@ -312,7 +312,11 @@ func renderReadmeFile(ctx *context.Context, subfolder string, readmeFile *git.Tr
 		ctx.Data["EscapeStatus"], ctx.Data["FileContent"], err = markupRender(ctx, &markup.RenderContext{
 			Ctx:          ctx,
 			RelativePath: path.Join(ctx.Repo.TreePath, readmeFile.Name()), // ctx.Repo.TreePath is the directory not the Readme so we must append the Readme filename (and path).
-			URLPrefix:    path.Join(readmeTreelink, subfolder),
+			Links: markup.Links{
+				Base:       ctx.Repo.RepoLink,
+				BranchPath: ctx.Repo.BranchNameSubURL(),
+				TreePath:   path.Join(ctx.Repo.TreePath, subfolder),
+			},
 			Metas:   ctx.Repo.Repository.ComposeDocumentMetas(ctx),
 			GitRepo: ctx.Repo.GitRepo,
 		}, rd)
@@ -337,7 +341,7 @@ func renderReadmeFile(ctx *context.Context, subfolder string, readmeFile *git.Tr
 	}
 }
 
-func renderFile(ctx *context.Context, entry *git.TreeEntry, treeLink, rawLink string) {
+func renderFile(ctx *context.Context, entry *git.TreeEntry) {
 	ctx.Data["IsViewFile"] = true
 	ctx.Data["HideRepoInfo"] = true
 	blob := entry.Blob()
@@ -351,7 +355,7 @@ func renderFile(ctx *context.Context, entry *git.TreeEntry, treeLink, rawLink st
 	ctx.Data["Title"] = ctx.Tr("repo.file.title", ctx.Repo.Repository.Name+"/"+path.Base(ctx.Repo.TreePath), ctx.Repo.RefName)
 	ctx.Data["FileIsSymlink"] = entry.IsLink()
 	ctx.Data["FileName"] = blob.Name()
-	ctx.Data["RawFileLink"] = rawLink + "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
+	ctx.Data["RawFileLink"] = ctx.Repo.RepoLink + "/raw/" + ctx.Repo.BranchNameSubURL() + "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
 
 	if ctx.Repo.TreePath == ".editorconfig" {
 		_, editorconfigWarning, editorconfigErr := ctx.Repo.GetEditorconfig(ctx.Repo.Commit)
@@ -479,7 +483,11 @@ func renderFile(ctx *context.Context, entry *git.TreeEntry, treeLink, rawLink st
 				Ctx:          ctx,
 				Type:         markupType,
 				RelativePath: ctx.Repo.TreePath,
-				URLPrefix:    path.Dir(treeLink),
+				Links: markup.Links{
+					Base:       ctx.Repo.RepoLink,
+					BranchPath: ctx.Repo.BranchNameSubURL(),
+					TreePath:   path.Dir(ctx.Repo.TreePath),
+				},
 				Metas:   metas,
 				GitRepo: ctx.Repo.GitRepo,
 			}, rd)
@@ -585,7 +593,11 @@ func renderFile(ctx *context.Context, entry *git.TreeEntry, treeLink, rawLink st
 			ctx.Data["EscapeStatus"], ctx.Data["FileContent"], err = markupRender(ctx, &markup.RenderContext{
 				Ctx:          ctx,
 				RelativePath: ctx.Repo.TreePath,
-				URLPrefix:    path.Dir(treeLink),
+				Links: markup.Links{
+					Base:       ctx.Repo.RepoLink,
+					BranchPath: ctx.Repo.BranchNameSubURL(),
+					TreePath:   path.Dir(ctx.Repo.TreePath),
+				},
 				Metas:   ctx.Repo.Repository.ComposeDocumentMetas(ctx),
 				GitRepo: ctx.Repo.GitRepo,
 			}, rd)
@@ -945,14 +957,6 @@ func renderCode(ctx *context.Context) {
 	}
 	ctx.Data["Title"] = title
 
-	branchLink := ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL()
-	treeLink := branchLink
-	rawLink := ctx.Repo.RepoLink + "/raw/" + ctx.Repo.BranchNameSubURL()
-
-	if len(ctx.Repo.TreePath) > 0 {
-		treeLink += "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
-	}
-
 	// Get Topics of this repo
 	renderRepoTopics(ctx)
 	if ctx.Written() {
@@ -977,9 +981,9 @@ func renderCode(ctx *context.Context) {
 	}
 
 	if entry.IsDir() {
-		renderDirectory(ctx, treeLink)
+		renderDirectory(ctx)
 	} else {
-		renderFile(ctx, entry, treeLink, rawLink)
+		renderFile(ctx, entry)
 	}
 	if ctx.Written() {
 		return
@@ -1020,6 +1024,12 @@ func renderCode(ctx *context.Context) {
 	}
 
 	ctx.Data["Paths"] = paths
+
+	branchLink := ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL()
+	treeLink := branchLink
+	if len(ctx.Repo.TreePath) > 0 {
+		treeLink += "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
+	}
 	ctx.Data["TreeLink"] = treeLink
 	ctx.Data["TreeNames"] = treeNames
 	ctx.Data["BranchLink"] = branchLink

routers/web/repo/wiki.go

@@ -239,8 +239,10 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 
 	rctx := &markup.RenderContext{
 		Ctx:   ctx,
-		URLPrefix: ctx.Repo.RepoLink,
 		Metas: ctx.Repo.Repository.ComposeDocumentMetas(ctx),
+		Links: markup.Links{
+			Base: ctx.Repo.RepoLink,
+		},
 		IsWiki: true,
 	}
 	buf := &strings.Builder{}

routers/web/shared/user/header.go

@@ -47,9 +47,7 @@ func PrepareContextForProfileBigAvatar(ctx *context.Context) {
 
 	if len(ctx.ContextUser.Description) != 0 {
 		content, err := markdown.RenderString(&markup.RenderContext{
-			URLPrefix: ctx.Repo.RepoLink,
 			Metas: map[string]string{"mode": "document"},
-			GitRepo:   ctx.Repo.GitRepo,
 			Ctx:   ctx,
 		}, ctx.ContextUser.Description)
 		if err != nil {

routers/web/user/home.go

@@ -258,7 +258,9 @@ func Milestones(ctx *context.Context) {
 		}
 
 		milestones[i].RenderedContent, err = markdown.RenderString(&markup.RenderContext{
-			URLPrefix: milestones[i].Repo.Link(),
+			Links: markup.Links{
+				Base: milestones[i].Repo.Link(),
+			},
 			Metas: milestones[i].Repo.ComposeMetas(ctx),
 			Ctx:   ctx,
 		}, milestones[i].Content)

routers/web/user/profile.go

@@ -7,6 +7,7 @@ package user
 import (
 	"fmt"
 	"net/http"
+	"path"
 	"strings"
 
 	activities_model "code.gitea.io/gitea/models/activities"
@@ -233,17 +234,18 @@ func prepareUserProfileTabData(ctx *context.Context, showPrivate bool, profileDb
 		if bytes, err := profileReadme.GetBlobContent(setting.UI.MaxDisplayFileSize); err != nil {
 			log.Error("failed to GetBlobContent: %v", err)
 		} else {
-			// Give the URLPrefix to the markdown render for the full link of media element.
+			if profileContent, err := markdown.RenderString(&markup.RenderContext{
+				Ctx:     ctx,
+				GitRepo: profileGitRepo,
+				Links: markup.Links{
+					// Give the repo link to the markdown render for the full link of media element.
 					// the media link usually be like /[user]/[repoName]/media/branch/[branchName],
 					// 	Eg. /Tom/.profile/media/branch/main
 					// The branch shown on the profile page is the default branch, this need to be in sync with doc, see:
 					//	https://docs.gitea.com/usage/profile-readme
-
-			prefix := profileDbRepo.Link() + "/src/branch/" + util.PathEscapeSegments(profileDbRepo.DefaultBranch)
-			if profileContent, err := markdown.RenderString(&markup.RenderContext{
-				Ctx:       ctx,
-				GitRepo:   profileGitRepo,
-				URLPrefix: prefix,
+					Base:       profileDbRepo.Link(),
+					BranchPath: path.Join("branch", util.PathEscapeSegments(profileDbRepo.DefaultBranch)),
+				},
 				Metas: map[string]string{"mode": "document"},
 			}, bytes); err != nil {
 				log.Error("failed to RenderString: %v", err)

services/mailer/mail.go

@@ -221,7 +221,9 @@ func composeIssueCommentMessages(ctx *mailCommentContext, lang string, recipient
 	// This is the body of the new issue or comment, not the mail body
 	body, err := markdown.RenderString(&markup.RenderContext{
 		Ctx: ctx,
-		URLPrefix: ctx.Issue.Repo.HTMLURL(),
+		Links: markup.Links{
+			Base: ctx.Issue.Repo.HTMLURL(),
+		},
 		Metas: ctx.Issue.Repo.ComposeMetas(ctx),
 	}, ctx.Content)
 	if err != nil {

services/mailer/mail_release.go

@@ -58,7 +58,9 @@ func mailNewRelease(ctx context.Context, lang string, tos []string, rel *repo_mo
 	var err error
 	rel.RenderedNote, err = markdown.RenderString(&markup.RenderContext{
 		Ctx: ctx,
-		URLPrefix: rel.Repo.Link(),
+		Links: markup.Links{
+			Base: rel.Repo.HTMLURL(),
+		},
 		Metas: rel.Repo.ComposeMetas(ctx),
 	}, rel.Note)
 	if err != nil {

templates/repo/branch/list.tmpl

@@ -25,7 +25,7 @@
 									<button class="btn interact-fg gt-px-2" data-clipboard-text="{{.DefaultBranchBranch.DBBranch.Name}}">{{svg "octicon-copy" 14}}</button>
 									{{template "repo/commit_statuses" dict "Status" (index $.CommitStatus .DefaultBranchBranch.DBBranch.CommitID) "Statuses" (index $.CommitStatuses .DefaultBranchBranch.DBBranch.CommitID)}}
 								</div>
-								<p class="info gt-df gt-ac gt-my-2">{{svg "octicon-git-commit" 16 "gt-mr-2"}}<a href="{{.RepoLink}}/commit/{{PathEscape .DefaultBranchBranch.DBBranch.CommitID}}">{{ShortSha .DefaultBranchBranch.DBBranch.CommitID}}</a> · <span class="commit-message">{{RenderCommitMessage $.Context .DefaultBranchBranch.DBBranch.CommitMessage .RepoLink (.Repository.ComposeMetas ctx)}}</span> · {{ctx.Locale.Tr "org.repo_updated"}} {{TimeSince .DefaultBranchBranch.DBBranch.CommitTime.AsTime ctx.Locale}}{{if .DefaultBranchBranch.DBBranch.Pusher}} &nbsp;{{template "shared/user/avatarlink" dict "user" .DefaultBranchBranch.DBBranch.Pusher}}{{template "shared/user/namelink" .DefaultBranchBranch.DBBranch.Pusher}}{{end}}</p>
+								<p class="info gt-df gt-ac gt-my-2">{{svg "octicon-git-commit" 16 "gt-mr-2"}}<a href="{{.RepoLink}}/commit/{{PathEscape .DefaultBranchBranch.DBBranch.CommitID}}">{{ShortSha .DefaultBranchBranch.DBBranch.CommitID}}</a> · <span class="commit-message">{{RenderCommitMessage $.Context .DefaultBranchBranch.DBBranch.CommitMessage (.Repository.ComposeMetas ctx)}}</span> · {{ctx.Locale.Tr "org.repo_updated"}} {{TimeSince .DefaultBranchBranch.DBBranch.CommitTime.AsTime ctx.Locale}}{{if .DefaultBranchBranch.DBBranch.Pusher}} &nbsp;{{template "shared/user/avatarlink" dict "user" .DefaultBranchBranch.DBBranch.Pusher}}{{template "shared/user/namelink" .DefaultBranchBranch.DBBranch.Pusher}}{{end}}</p>
 							</td>
 							<td class="right aligned middle aligned overflow-visible">
 								{{if and $.IsWriter (not $.Repository.IsArchived) (not .IsDeleted)}}
@@ -101,7 +101,7 @@
 										<button class="btn interact-fg gt-px-2" data-clipboard-text="{{.DBBranch.Name}}">{{svg "octicon-copy" 14}}</button>
 										{{template "repo/commit_statuses" dict "Status" (index $.CommitStatus .DBBranch.CommitID) "Statuses" (index $.CommitStatuses .DBBranch.CommitID)}}
 									</div>
-									<p class="info gt-df gt-ac gt-my-2">{{svg "octicon-git-commit" 16 "gt-mr-2"}}<a href="{{$.RepoLink}}/commit/{{PathEscape .DBBranch.CommitID}}">{{ShortSha .DBBranch.CommitID}}</a> · <span class="commit-message">{{RenderCommitMessage $.Context .DBBranch.CommitMessage $.RepoLink ($.Repository.ComposeMetas ctx)}}</span> · {{ctx.Locale.Tr "org.repo_updated"}} {{TimeSince .DBBranch.CommitTime.AsTime ctx.Locale}}{{if .DBBranch.Pusher}} &nbsp;{{template "shared/user/avatarlink" dict "user" .DBBranch.Pusher}} &nbsp;{{template "shared/user/namelink" .DBBranch.Pusher}}{{end}}</p>
+									<p class="info gt-df gt-ac gt-my-2">{{svg "octicon-git-commit" 16 "gt-mr-2"}}<a href="{{$.RepoLink}}/commit/{{PathEscape .DBBranch.CommitID}}">{{ShortSha .DBBranch.CommitID}}</a> · <span class="commit-message">{{RenderCommitMessage $.Context .DBBranch.CommitMessage ($.Repository.ComposeMetas ctx)}}</span> · {{ctx.Locale.Tr "org.repo_updated"}} {{TimeSince .DBBranch.CommitTime.AsTime ctx.Locale}}{{if .DBBranch.Pusher}} &nbsp;{{template "shared/user/avatarlink" dict "user" .DBBranch.Pusher}} &nbsp;{{template "shared/user/namelink" .DBBranch.Pusher}}{{end}}</p>
 								{{end}}
 								</td>
 								<td class="two wide ui">

templates/repo/commit_page.tmpl

@@ -19,7 +19,7 @@
 		{{end}}
 		<div class="ui top attached header clearing segment gt-relative commit-header {{$class}}">
 			<div class="gt-df gt-mb-4 gt-fw">
-				<h3 class="gt-mb-0 gt-f1"><span class="commit-summary" title="{{.Commit.Summary}}">{{RenderCommitMessage $.Context .Commit.Message $.RepoLink ($.Repository.ComposeMetas ctx)}}</span>{{template "repo/commit_statuses" dict "Status" .CommitStatus "Statuses" .CommitStatuses}}</h3>
+				<h3 class="gt-mb-0 gt-f1"><span class="commit-summary" title="{{.Commit.Summary}}">{{RenderCommitMessage $.Context .Commit.Message ($.Repository.ComposeMetas ctx)}}</span>{{template "repo/commit_statuses" dict "Status" .CommitStatus "Statuses" .CommitStatuses}}</h3>
 				{{if not $.PageIsWiki}}
 					<div>
 						<a class="ui primary tiny button" href="{{.SourcePath}}">
@@ -135,7 +135,7 @@
 				{{end}}
 			</div>
 			{{if IsMultilineCommitMessage .Commit.Message}}
-				<pre class="commit-body">{{RenderCommitBody $.Context .Commit.Message $.RepoLink ($.Repository.ComposeMetas ctx)}}</pre>
+				<pre class="commit-body">{{RenderCommitBody $.Context .Commit.Message ($.Repository.ComposeMetas ctx)}}</pre>
 			{{end}}
 			{{template "repo/commit_load_branches_and_tags" .}}
 		</div>
@@ -258,7 +258,7 @@
 				</div>
 			</div>
 		{{end}}
-		{{if .Note}}
+		{{if .NoteRendered}}
 			<div class="ui top attached header segment git-notes">
 				{{svg "octicon-note" 16 "gt-mr-3"}}
 				{{ctx.Locale.Tr "repo.diff.git-notes"}}:
@@ -276,7 +276,7 @@
 				<span class="text grey" id="note-authored-time">{{TimeSince .NoteCommit.Author.When ctx.Locale}}</span>
 			</div>
 			<div class="ui bottom attached info segment git-notes">
-				<pre class="commit-body">{{RenderNote $.Context .Note $.RepoLink ($.Repository.ComposeMetas ctx)}}</pre>
+				<pre class="commit-body">{{.NoteRendered | Str2html}}</pre>
 			</div>
 		{{end}}
 		{{template "repo/diff/box" .}}

templates/repo/commits_list.tmpl

@@ -60,7 +60,7 @@
 								<span class="commit-summary {{if gt .ParentCount 1}} grey text{{end}}" title="{{.Summary}}">{{.Summary | RenderEmoji $.Context}}</span>
 							{{else}}
 								{{$commitLink:= printf "%s/commit/%s" $commitRepoLink (PathEscape .ID.String)}}
-								<span class="commit-summary {{if gt .ParentCount 1}} grey text{{end}}" title="{{.Summary}}">{{RenderCommitMessageLinkSubject $.Context .Message $commitRepoLink $commitLink ($.Repository.ComposeMetas ctx)}}</span>
+								<span class="commit-summary {{if gt .ParentCount 1}} grey text{{end}}" title="{{.Summary}}">{{RenderCommitMessageLinkSubject $.Context .Message $commitLink ($.Repository.ComposeMetas ctx)}}</span>
 							{{end}}
 							</span>
 							{{if IsMultilineCommitMessage .Message}}
@@ -68,7 +68,7 @@
 							{{end}}
 							{{template "repo/commit_statuses" dict "Status" .Status "Statuses" .Statuses}}
 							{{if IsMultilineCommitMessage .Message}}
-							<pre class="commit-body gt-hidden">{{RenderCommitBody $.Context .Message $commitRepoLink ($.Repository.ComposeMetas ctx)}}</pre>
+							<pre class="commit-body gt-hidden">{{RenderCommitBody $.Context .Message ($.Repository.ComposeMetas ctx)}}</pre>
 							{{end}}
 						</td>
 						{{if .Committer}}

templates/repo/commits_list_small.tmpl

@@ -38,12 +38,12 @@
 			</a>
 		</span>
 
-		<span class="gt-mono commit-summary {{if gt .ParentCount 1}} grey text{{end}}" title="{{.Summary}}">{{RenderCommitMessageLinkSubject $.root.Context .Message ($.comment.Issue.PullRequest.BaseRepo.Link|Escape) $commitLink ($.comment.Issue.PullRequest.BaseRepo.ComposeMetas ctx)}}</span>
+		<span class="gt-mono commit-summary {{if gt .ParentCount 1}} grey text{{end}}" title="{{.Summary}}">{{RenderCommitMessageLinkSubject $.root.Context .Message $commitLink ($.comment.Issue.PullRequest.BaseRepo.ComposeMetas ctx)}}</span>
 		{{if IsMultilineCommitMessage .Message}}
 			<button class="ui button js-toggle-commit-body ellipsis-button" aria-expanded="false">...</button>
 		{{end}}
 		{{if IsMultilineCommitMessage .Message}}
-			<pre class="commit-body gt-hidden">{{RenderCommitBody $.root.Context .Message ($.comment.Issue.PullRequest.BaseRepo.Link|Escape) ($.comment.Issue.PullRequest.BaseRepo.ComposeMetas ctx)}}</pre>
+			<pre class="commit-body gt-hidden">{{RenderCommitBody $.root.Context .Message ($.comment.Issue.PullRequest.BaseRepo.ComposeMetas ctx)}}</pre>
 		{{end}}
 	</div>
 {{end}}

templates/repo/diff/compare.tmpl

@@ -194,7 +194,7 @@
 				<div class="twelve wide column issue-title">
 					{{ctx.Locale.Tr "repo.pulls.has_pull_request" (print (Escape $.RepoLink) "/pulls/" .PullRequest.Issue.Index) (Escape $.RepoRelPath) .PullRequest.Index | Safe}}
 					<h1>
-						<span id="issue-title">{{RenderIssueTitle $.Context .PullRequest.Issue.Title $.RepoLink ($.Repository.ComposeMetas ctx)}}</span>
+						<span id="issue-title">{{RenderIssueTitle $.Context .PullRequest.Issue.Title ($.Repository.ComposeMetas ctx)}}</span>
 						<span class="index">#{{.PullRequest.Issue.Index}}</span>
 					</h1>
 				</div>

templates/repo/graph/commits.tmpl

@@ -29,7 +29,7 @@
 						</a>
 					</span>
 					<span class="message gt-dib gt-ellipsis gt-mr-3">
-						<span>{{RenderCommitMessage $.Context $commit.Subject $.RepoLink ($.Repository.ComposeMetas ctx)}}</span>
+						<span>{{RenderCommitMessage $.Context $commit.Subject ($.Repository.ComposeMetas ctx)}}</span>
 					</span>
 					<span class="commit-refs gt-df gt-ac gt-mr-2">
 						{{range $commit.Refs}}

templates/repo/issue/view_title.tmpl

@@ -6,7 +6,7 @@
 <div class="issue-title-header">
 	<div class="issue-title" id="issue-title-wrapper">
 		<h1 class="gt-word-break">
-			<span id="issue-title">{{RenderIssueTitle $.Context .Issue.Title $.RepoLink ($.Repository.ComposeMetas ctx) | RenderCodeBlock}} <span class="index">#{{.Issue.Index}}</span>
+			<span id="issue-title">{{RenderIssueTitle $.Context .Issue.Title ($.Repository.ComposeMetas ctx) | RenderCodeBlock}} <span class="index">#{{.Issue.Index}}</span>
 </span>
 			<div id="edit-title-input" class="ui input gt-f1 gt-hidden">
 				<input value="{{.Issue.Title}}" maxlength="255" autocomplete="off">

templates/repo/view_list.tmpl

@@ -26,10 +26,10 @@
 					</a>
 					{{template "repo/commit_statuses" dict "Status" .LatestCommitStatus "Statuses" .LatestCommitStatuses}}
 					{{$commitLink:= printf "%s/commit/%s" .RepoLink (PathEscape .LatestCommit.ID.String)}}
-					<span class="grey commit-summary" title="{{.LatestCommit.Summary}}"><span class="message-wrapper">{{RenderCommitMessageLinkSubject $.Context .LatestCommit.Message $.RepoLink $commitLink ($.Repository.ComposeMetas ctx)}}</span>
+					<span class="grey commit-summary" title="{{.LatestCommit.Summary}}"><span class="message-wrapper">{{RenderCommitMessageLinkSubject $.Context .LatestCommit.Message $commitLink ($.Repository.ComposeMetas ctx)}}</span>
 						{{if IsMultilineCommitMessage .LatestCommit.Message}}
 							<button class="ui button js-toggle-commit-body ellipsis-button" aria-expanded="false">...</button>
-							<pre class="commit-body gt-hidden">{{RenderCommitBody $.Context .LatestCommit.Message $.RepoLink ($.Repository.ComposeMetas ctx)}}</pre>
+							<pre class="commit-body gt-hidden">{{RenderCommitBody $.Context .LatestCommit.Message ($.Repository.ComposeMetas ctx)}}</pre>
 						{{end}}
 					</span>
 				{{end}}
@@ -83,7 +83,7 @@
 					<span class="truncate">
 						{{if $commit}}
 							{{$commitLink := printf "%s/commit/%s" $.RepoLink (PathEscape $commit.ID.String)}}
-							{{RenderCommitMessageLinkSubject $.Context $commit.Message $.RepoLink $commitLink ($.Repository.ComposeMetas ctx)}}
+							{{RenderCommitMessageLinkSubject $.Context $commit.Message $commitLink ($.Repository.ComposeMetas ctx)}}
 						{{else}}
 							<div class="ui active tiny slow centered inline">…</div>
 						{{end}}

templates/user/dashboard/feeds.tmpl

@@ -91,7 +91,7 @@
 								<img class="ui avatar" src="{{$push.AvatarLink $.Context .AuthorEmail}}" title="{{.AuthorName}}" width="16" height="16">
 								<a class="ui sha label" href="{{$commitLink}}">{{ShortSha .Sha1}}</a>
 								<span class="text truncate">
-									{{RenderCommitMessage $.Context .Message $repoLink ($repo.ComposeMetas ctx)}}
+									{{RenderCommitMessage $.Context .Message ($repo.ComposeMetas ctx)}}
 								</span>
 							</div>
 						{{end}}

tests/fuzz/fuzz_test.go

@@ -16,7 +16,9 @@ import (
 
 var renderContext = markup.RenderContext{
 	Ctx: context.Background(),
-	URLPrefix: "https://example.com/go-gitea/gitea",
+	Links: markup.Links{
+		Base: "https://example.com/go-gitea/gitea",
+	},
 	Metas: map[string]string{
 		"user": "go-gitea",
 		"repo": "gitea",