Fix #21406: Hide repo information from file view/blame mode (#21420)

# Summary

The repo information such as description, stats and topics are getting
displayed in the top-bar when viewing a file. This has been fixed to
display the repo information only while navigating the repo and not
while viewing or blaming a file from the repo

## Before fix

Screenshot from the issue


![image](https://user-images.githubusercontent.com/47709856/195278543-9afbb735-7bd3-4f42-b3ba-da514c6989d2.png)

## After the fix

- **Repo homepage**

The repo description, topics and summary will be displayed


![image](https://user-images.githubusercontent.com/47709856/195443913-2ca967cd-6694-4a97-98d0-4d0750692b5d.png)

- **When opening a file**

The repo description, topic and summary has been conditionally hidden
from the view

<img width="1311" alt="image"
src="https://user-images.githubusercontent.com/47709856/195278964-9479231c-62ad-4c0e-b438-2018f22289db.png">

- **When running blame on a file**

> This was originally not part of the issue #21406. However the fix
seems relevant for the blame view as well.

<img width="1312" alt="image"
src="https://user-images.githubusercontent.com/47709856/195279619-02010775-aec3-4c8d-a184-d2d838c797e8.png">

- **From within a directory**

The repo description, topics and summary will not be displayed


![image](https://user-images.githubusercontent.com/47709856/195444080-ff5b2def-7e0f-47d7-b54a-7e9df5f9edd8.png)


Supporting integration tests have also been added.

4 files changed, 83 insertions, 2 deletions

diff --git a/routers/web/repo/view.go b/routers/web/repo/view.go
index a43840467d..3e869376ee 100644
--- a/routers/web/repo/view.go
+++ b/routers/web/repo/view.go
@@ -119,6 +119,7 @@ func renderDirectory(ctx *context.Context, treeLink string) {
 	}
 
 	if ctx.Repo.TreePath != "" {
+		ctx.Data["HideRepoInfo"] = true
 		ctx.Data["Title"] = ctx.Tr("repo.file.title", ctx.Repo.Repository.Name+"/"+path.Base(ctx.Repo.TreePath), ctx.Repo.RefName)
 	}
 
@@ -360,6 +361,7 @@ func renderReadmeFile(ctx *context.Context, readmeFile *namedBlob, readmeTreelin
 
 func renderFile(ctx *context.Context, entry *git.TreeEntry, treeLink, rawLink string) {
 	ctx.Data["IsViewFile"] = true
+	ctx.Data["HideRepoInfo"] = true
 	blob := entry.Blob()
 	dataRc, err := blob.DataAsync()
 	if err != nil {
diff --git a/templates/repo/home.tmpl b/templates/repo/home.tmpl
index e1aa1c4f3b..9d4842579f 100644
--- a/templates/repo/home.tmpl
+++ b/templates/repo/home.tmpl
@@ -3,6 +3,7 @@
 	{{template "repo/header" .}}
 	<div class="ui container {{if .IsBlame}}fluid padded{{end}}">
 		{{template "base/alert" .}}
+		{{if and (not .HideRepoInfo) (not .IsBlame)}}
 		<div class="ui repo-description">
 			<div id="repo-desc">
 				{{$description := .Repository.DescriptionHTML $.Context}}
@@ -31,6 +32,7 @@
 		{{range .Topics}}<a class="ui repo-topic large label topic" href="{{AppSubUrl}}/explore/repos?q={{.Name}}&topic=1">{{.Name}}</a>{{end}}
 		{{if and .Permission.IsAdmin (not .Repository.IsArchived)}}<a id="manage_topic" class="muted">{{.locale.Tr "repo.topic.manage_topics"}}</a>{{end}}
 		</div>
+		{{end}}
 		{{if and .Permission.IsAdmin (not .Repository.IsArchived)}}
 		<div class="ui repo-topic-edit grid form" id="topic_edit" style="display:none">
 			<div class="fourteen wide column">
diff --git a/templates/repo/sub_menu.tmpl b/templates/repo/sub_menu.tmpl
index e63cb50df1..fac8e5ac99 100644
--- a/templates/repo/sub_menu.tmpl
+++ b/templates/repo/sub_menu.tmpl
@@ -1,3 +1,4 @@
+{{if and (not .HideRepoInfo) (not .IsBlame)}}
 <div class="ui segments repository-summary{{if and (.Permission.CanRead $.UnitTypeCode) (not .IsEmptyRepo) .LanguageStats}} repository-summary-language-stats{{end}} mt-2 mb-0">
 	<div class="ui segment sub-menu repository-menu">
 		<div class="ui two horizontal center link list">
@@ -44,3 +45,4 @@
 	</a>
 	{{end}}
 </div>
+{{end}}
diff --git a/tests/integration/repo_test.go b/tests/integration/repo_test.go
index 8dfa9d08f1..8e494a9af4 100644
--- a/tests/integration/repo_test.go
+++ b/tests/integration/repo_test.go
@@ -22,13 +22,24 @@ import (
 func TestViewRepo(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()
 
+	session := loginUser(t, "user2")
+
 	req := NewRequest(t, "GET", "/user2/repo1")
-	MakeRequest(t, req, http.StatusOK)
+	resp := session.MakeRequest(t, req, http.StatusOK)
+
+	htmlDoc := NewHTMLParser(t, resp.Body)
+	noDescription := htmlDoc.doc.Find("#repo-desc").Children()
+	repoTopics := htmlDoc.doc.Find("#repo-topics").Children()
+	repoSummary := htmlDoc.doc.Find(".repository-summary").Children()
+
+	assert.True(t, noDescription.HasClass("no-description"))
+	assert.True(t, repoTopics.HasClass("repo-topic"))
+	assert.True(t, repoSummary.HasClass("repository-menu"))
 
 	req = NewRequest(t, "GET", "/user3/repo3")
 	MakeRequest(t, req, http.StatusNotFound)
 
-	session := loginUser(t, "user1")
+	session = loginUser(t, "user1")
 	session.MakeRequest(t, req, http.StatusNotFound)
 }
 
@@ -178,7 +189,71 @@ func TestViewAsRepoAdmin(t *testing.T) {
 
 		htmlDoc := NewHTMLParser(t, resp.Body)
 		noDescription := htmlDoc.doc.Find("#repo-desc").Children()
+		repoTopics := htmlDoc.doc.Find("#repo-topics").Children()
+		repoSummary := htmlDoc.doc.Find(".repository-summary").Children()
 
 		assert.Equal(t, expectedNoDescription, noDescription.HasClass("no-description"))
+		assert.True(t, repoTopics.HasClass("repo-topic"))
+		assert.True(t, repoSummary.HasClass("repository-menu"))
 	}
 }
+
+// TestViewFileInRepo repo description, topics and summary should not be displayed when viewing a file
+func TestViewFileInRepo(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	session := loginUser(t, "user2")
+
+	req := NewRequest(t, "GET", "/user2/repo1/src/branch/master/README.md")
+	resp := session.MakeRequest(t, req, http.StatusOK)
+
+	htmlDoc := NewHTMLParser(t, resp.Body)
+	description := htmlDoc.doc.Find("#repo-desc")
+	repoTopics := htmlDoc.doc.Find("#repo-topics")
+	repoSummary := htmlDoc.doc.Find(".repository-summary")
+
+	assert.EqualValues(t, 0, description.Length())
+	assert.EqualValues(t, 0, repoTopics.Length())
+	assert.EqualValues(t, 0, repoSummary.Length())
+}
+
+// TestBlameFileInRepo repo description, topics and summary should not be displayed when running blame on a file
+func TestBlameFileInRepo(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	session := loginUser(t, "user2")
+
+	req := NewRequest(t, "GET", "/user2/repo1/blame/branch/master/README.md")
+	resp := session.MakeRequest(t, req, http.StatusOK)
+
+	htmlDoc := NewHTMLParser(t, resp.Body)
+	description := htmlDoc.doc.Find("#repo-desc")
+	repoTopics := htmlDoc.doc.Find("#repo-topics")
+	repoSummary := htmlDoc.doc.Find(".repository-summary")
+
+	assert.EqualValues(t, 0, description.Length())
+	assert.EqualValues(t, 0, repoTopics.Length())
+	assert.EqualValues(t, 0, repoSummary.Length())
+}
+
+// TestViewRepoDirectory repo description, topics and summary should not be displayed when within a directory
+func TestViewRepoDirectory(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	session := loginUser(t, "user2")
+
+	req := NewRequest(t, "GET", "/user2/repo20/src/branch/master/a")
+	resp := session.MakeRequest(t, req, http.StatusOK)
+
+	htmlDoc := NewHTMLParser(t, resp.Body)
+	description := htmlDoc.doc.Find("#repo-desc")
+	repoTopics := htmlDoc.doc.Find("#repo-topics")
+	repoSummary := htmlDoc.doc.Find(".repository-summary")
+
+	repoFilesTable := htmlDoc.doc.Find("#repo-files-table")
+	assert.NotZero(t, len(repoFilesTable.Nodes))
+
+	assert.Zero(t, description.Length())
+	assert.Zero(t, repoTopics.Length())
+	assert.Zero(t, repoSummary.Length())
+}