com/templates/repo/view_file.tmpl

<div class="{{TabSizeClass .Editorconfig .FileName}} non-diff-file-content">
	<h4 class="file-header ui top attached header">
		<div class="file-header-left">
			{{if .ReadmeInList}}
				<i class="book icon"></i>
				<strong>{{.FileName}}</strong>
			{{else}}
				<div class="file-info text grey normal mono">
					{{if .NumLines}}
						<div class="file-info-entry">
							{{.NumLines}} {{.i18n.Tr (TrN .i18n.Lang .NumLines "repo.line" "repo.lines") }}
						</div>
					{{end}}
					{{if .FileSize}}
						<div class="file-info-entry">
							{{FileSize .FileSize}}{{if .IsLFSFile}} ({{.i18n.Tr "repo.stored_lfs"}}){{end}}
						</div>
					{{end}}
				</div>
			{{end}}
		</div>
		{{if not .ReadmeInList}}
		<div class="file-header-right">
			<div class="ui right file-actions">
				<div class="ui buttons">
					<a class="ui button" href="{{EscapePound $.RawFileLink}}">{{.i18n.Tr "repo.file_raw"}}</a>
					{{if not .IsViewCommit}}
						<a class="ui button" href="{{.RepoLink}}/src/commit/{{.CommitID}}/{{EscapePound .TreePath}}">{{.i18n.Tr "repo.file_permalink"}}</a>
					{{end}}
					{{if .IsTextFile}}
						<a class="ui button" href="{{.RepoLink}}/blame/{{EscapePound .BranchNameSubURL}}/{{EscapePound .TreePath}}">{{.i18n.Tr "repo.blame"}}</a>
					{{end}}
					<a class="ui button" href="{{.RepoLink}}/commits/{{EscapePound .BranchNameSubURL}}/{{EscapePound .TreePath}}">{{.i18n.Tr "repo.file_history"}}</a>
				</div>
				{{if .Repository.CanEnableEditor}}
					{{if .CanEditFile}}
						<a href="{{.RepoLink}}/_edit/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}"><i class="octicon octicon-pencil btn-octicon poping up"  data-content="{{.EditFileTooltip}}" data-position="bottom center" data-variation="tiny inverted"></i></a>
					{{else}}
						<i class="octicon octicon-pencil btn-octicon poping up disabled" data-content="{{.EditFileTooltip}}" data-position="bottom center" data-variation="tiny inverted"></i>
					{{end}}
					{{if .CanDeleteFile}}
						<a href="{{.RepoLink}}/_delete/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}"><i class="octicon octicon-trashcan btn-octicon btn-octicon-danger poping up"  data-content="{{.DeleteFileTooltip}}" data-position="bottom center" data-variation="tiny inverted"></i></a>
					{{else}}
						<i class="octicon octicon-trashcan btn-octicon poping up disabled" data-content="{{.DeleteFileTooltip}}" data-position="bottom center" data-variation="tiny inverted"></i>
					{{end}}
				{{end}}
			</div>
		</div>
		{{end}}
	</h4>
	<div class="ui attached table unstackable segment">
		<div class="file-view {{if .IsMarkup}}{{.MarkupType}} markdown{{else if .IsRenderedHTML}}plain-text{{else if .IsTextFile}}code-view{{end}} has-emoji">
			{{if .IsMarkup}}
				{{if .FileContent}}{{.FileContent | Safe}}{{end}}
			{{else if .IsRenderedHTML}}
				<pre>{{if .FileContent}}{{.FileContent | Str2html}}{{end}}</pre>
			{{else if not .IsTextFile}}
				<div class="view-raw ui center">
					{{if .IsImageFile}}
						<img src="{{EscapePound $.RawFileLink}}">
					{{else if .IsVideoFile}}
						<video controls src="{{EscapePound $.RawFileLink}}">
							<strong>{{.i18n.Tr "repo.video_not_supported_in_browser"}}</strong>
						</video>
					{{else if .IsAudioFile}}
						<audio controls src="{{EscapePound $.RawFileLink}}">
							<strong>{{.i18n.Tr "repo.audio_not_supported_in_browser"}}</strong>
						</audio>
					{{else if .IsPDFFile}}
						<iframe width="100%" height="600px" src="{{StaticUrlPrefix}}/vendor/plugins/pdfjs/web/viewer.html?file={{EscapePound $.RawFileLink}}"></iframe>
					{{else}}
						<a href="{{EscapePound $.RawFileLink}}" rel="nofollow" class="btn btn-gray btn-radius">{{.i18n.Tr "repo.file_view_raw"}}</a>
					{{end}}
				</div>
			{{else if .FileSize}}
				<table>
					<tbody>
						<tr>
						{{if .IsFileTooLarge}}
							<td><strong>{{.i18n.Tr "repo.file_too_large"}}</strong></td>
						{{else}}
							<td class="lines-num">{{.LineNums}}</td>
							<td class="lines-code"><pre><code class="{{.HighlightClass}}"><ol class="linenums">{{.FileContent}}</ol></code></pre></td>
						{{end}}
						</tr>
					</tbody>
				</table>
			{{end}}
		</div>
	</div>
</div>

<script>
function submitDeleteForm() {
    var message = prompt("{{.i18n.Tr "repo.delete_confirm_message"}}\n\n{{.i18n.Tr "repo.delete_commit_summary"}}", "Delete '{{.TreeName}}'");
    if (message != null) {
        $("#delete-message").val(message);
        $("#delete-file-form").submit()
    }
}
</script>