Clickable links in pull request (and issue) titles (#13695)

* clickable links in pull request (and issue) titles #13658

reuses the existing logic to render clickable links in commit messages

* dedicated RenderIssueTitle function

applied patch from @mrsdizzie

modules/markup/html.go

@@ -268,6 +268,25 @@ func RenderCommitMessageSubject(
 	return ctx.postProcess(rawHTML)
 }
 
+// RenderIssueTitle to process title on individual issue/pull page
+func RenderIssueTitle(
+	rawHTML []byte,
+	urlPrefix string,
+	metas map[string]string,
+) ([]byte, error) {
+	ctx := &postProcessCtx{
+		metas:     metas,
+		urlPrefix: urlPrefix,
+		procs: []processor{
+			issueIndexPatternProcessor,
+			sha1CurrentPatternProcessor,
+			emojiShortCodeProcessor,
+			emojiProcessor,
+		},
+	}
+	return ctx.postProcess(rawHTML)
+}
+
 // RenderDescriptionHTML will use similar logic as PostProcess, but will
 // use a single special linkProcessor.
 func RenderDescriptionHTML(

modules/templates/helper.go

@@ -154,6 +154,7 @@ func NewFuncMap() []template.FuncMap {
 		"RenderCommitMessageLink":        RenderCommitMessageLink,
 		"RenderCommitMessageLinkSubject": RenderCommitMessageLinkSubject,
 		"RenderCommitBody":               RenderCommitBody,
+		"RenderIssueTitle":               RenderIssueTitle,
 		"RenderEmoji":                    RenderEmoji,
 		"RenderEmojiPlain":               emoji.ReplaceAliases,
 		"ReactionToEmoji":                ReactionToEmoji,
@@ -630,6 +631,16 @@ func RenderCommitBody(msg, urlPrefix string, metas map[string]string) template.H
 	return template.HTML(renderedMessage)
 }
 
+// RenderIssueTitle renders issue/pull title with defined post processors
+func RenderIssueTitle(text, urlPrefix string, metas map[string]string) template.HTML {
+	renderedText, err := markup.RenderIssueTitle([]byte(template.HTMLEscapeString(text)), urlPrefix, metas)
+	if err != nil {
+		log.Error("RenderIssueTitle: %v", err)
+		return template.HTML("")
+	}
+	return template.HTML(renderedText)
+}
+
 // RenderEmoji renders html text with emoji post processors
 func RenderEmoji(text string) template.HTML {
 	renderedText, err := markup.RenderEmoji([]byte(template.HTMLEscapeString(text)))