Add view replaced file link for image diffs

app/helpers/commits_helper.rb

@@ -176,13 +176,15 @@ module CommitsHelper
     end
   end
 
-  def view_file_button(commit_sha, diff_new_path, project)
+  def view_file_button(commit_sha, diff_new_path, project, replaced: false)
+    title = replaced ? _('View replaced file @ ') : _('View file @ ')
+
     link_to(
       project_blob_path(project,
                                   tree_join(commit_sha, diff_new_path)),
       class: 'btn view-file js-view-file'
     ) do
-      raw('View file @ ') + content_tag(:span, Commit.truncate_sha(commit_sha),
+      raw(title) + content_tag(:span, Commit.truncate_sha(commit_sha),
                                        class: 'commit-sha')
     end
   end

app/views/projects/diffs/_file.html.haml

 - environment = local_assigns.fetch(:environment, nil)
 - file_hash = hexdigest(diff_file.file_path)
+- image_diff = diff_file.rich_viewer && diff_file.rich_viewer.partial_name == 'image'
+- image_replaced = diff_file.old_content_sha && diff_file.old_content_sha != diff_file.content_sha
+
 .diff-file.file-holder{ id: file_hash, data: diff_file_html_data(project, diff_file.file_path, diff_file.content_sha) }
   .js-file-title.file-title-flex-parent
     .file-header-content
@@ -17,6 +20,9 @@
             = edit_blob_link(@merge_request.source_project, @merge_request.source_branch, diff_file.new_path,
                              blob: blob, link_opts: link_opts)
 
+        - if image_diff && image_replaced
+          = view_file_button(diff_file.old_content_sha, diff_file.old_path, project, replaced: true)
+
         = view_file_button(diff_file.content_sha, diff_file.file_path, project)
         = view_on_environment_button(diff_file.content_sha, diff_file.file_path, environment) if environment
 

app/views/projects/diffs/viewers/_image.html.haml

@@ -15,7 +15,6 @@
     .two-up.view
       %span.wrap
         .frame.deleted
-          %a{ href: project_blob_path(@project, tree_join(diff_file.old_content_sha, diff_file.old_path)) }
           = image_tag(old_blob_raw_path, alt: diff_file.old_path)
         %p.image-info.hide
           %span.meta-filesize= number_to_human_size(old_blob.size)
@@ -27,7 +26,6 @@
           %span.meta-height
       %span.wrap
         .frame.added
-          %a{ href: project_blob_path(@project, tree_join(diff_file.content_sha, diff_file.new_path)) }
           = image_tag(blob_raw_path, alt: diff_file.new_path)
         %p.image-info.hide
           %span.meta-filesize= number_to_human_size(blob.size)

changelogs/unreleased/add-view-replaced-file-link.yml

+---
+title: Add view replaced file link for image diffs
+merge_request:
+author:
+type: changed

features/steps/project/commits/commits.rb

@@ -139,7 +139,7 @@ class Spinach::Features::ProjectCommits < Spinach::FeatureSteps
   end
 
   step 'The diff links to both the previous and current image' do
-    links = page.all('.two-up span div a')
+    links = page.all('.file-actions a')
     expect(links[0]['href']).to match %r{blob/#{sample_image_commit.old_blob_id}}
     expect(links[1]['href']).to match %r{blob/#{sample_image_commit.new_blob_id}}
   end

spec/features/projects/diffs/diff_show_spec.rb

@@ -62,6 +62,7 @@ feature 'Diff file viewer', :js do
   end
 
   context 'Image file' do
+    context 'Replaced' do
       before do
         visit_commit('2f63565e7aac07bcdadb654e253078b727143ec4')
       end
@@ -71,6 +72,35 @@ feature 'Diff file viewer', :js do
           expect(page).to have_css('img[alt="files/images/6049019_460s.jpg"]')
         end
       end
+
+      it 'shows view replaced and view file links' do
+        expect(page.all('.file-actions a').length).to eq 2
+        expect(page.all('.file-actions a')[0]).to have_content 'View replaced file @'
+        expect(page.all('.file-actions a')[1]).to have_content 'View file @'
+      end
+    end
+
+    context 'Added' do
+      before do
+        visit_commit('33f3729a45c02fc67d00adb1b8bca394b0e761d9')
+      end
+
+      it 'shows view file link' do
+        expect(page.all('.file-actions a').length).to eq 1
+        expect(page.all('.file-actions a')[0]).to have_content 'View file @'
+      end
+    end
+
+    context 'Deleted' do
+      before do
+        visit_commit('7fd7a459706ee87be6f855fd98ce8c552b15529a')
+      end
+
+      it 'shows view file link' do
+        expect(page.all('.file-actions a').length).to eq 1
+        expect(page.all('.file-actions a')[0]).to have_content 'View file @'
+      end
+    end
   end
 
   context 'ISO file (stored in LFS)' do