Do not show issue context popup on external issues

The issues pop-up context cannot work for external issues - therefore do not show
these.

Fix go-gitea#17047

Signed-off-by: Andrew Thornton <art27@cantab.net>

modules/markup/html.go

@@ -830,7 +830,7 @@ func issueIndexPatternProcessor(ctx *RenderContext, node *html.Node) {
 		reftext := node.Data[ref.RefLocation.Start:ref.RefLocation.End]
 		if exttrack && !ref.IsPull {
 			ctx.Metas["index"] = ref.Issue
-			link = createLink(com.Expand(ctx.Metas["format"], ctx.Metas), reftext, "ref-issue")
+			link = createLink(com.Expand(ctx.Metas["format"], ctx.Metas), reftext, "ref-issue ref-external-issue")
 		} else {
 			// Path determines the type of link that will be rendered. It's unknown at this point whether
 			// the linked item is actually a PR or an issue. Luckily it's of no real consequence because

modules/markup/sanitizer.go

@@ -66,7 +66,7 @@ func createDefaultPolicy() *bluemonday.Policy {
 	}
 
 	// Allow classes for anchors
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`ref-issue`)).OnElements("a")
+	policy.AllowAttrs("class").Matching(regexp.MustCompile(`ref-issue( ref-external-issue)?`)).OnElements("a")
 
 	// Allow classes for task lists
 	policy.AllowAttrs("class").Matching(regexp.MustCompile(`task-list-item`)).OnElements("li")

web_src/js/features/contextpopup.js

@@ -7,6 +7,9 @@ export default function initContextPopups() {
   if (!refIssues.length) return;
 
   refIssues.each(function () {
+    if ($(this).hasClass('ref-external-issue')) {
+      return;
+    }
     const [index, _issues, repo, owner] = $(this).attr('href').replace(/[#?].*$/, '').split('/').reverse();
 
     const el = document.createElement('div');