Add "Copy" button to file view of raw text

options/locale/locale_en-US.ini

@@ -88,6 +88,7 @@ edit = Edit
 
 copy = Copy
 copy_url = Copy URL
+copy_content = Copy content
 copy_branch = Copy branch name
 copy_success = Copied!
 copy_error = Copy failed

templates/repo/view_file.tmpl

@@ -58,6 +58,13 @@
 						<a class="ui mini basic button unescape-button" style="display: none;">{{.locale.Tr "repo.unescape_control_characters"}}</a>
 						<a class="ui mini basic button escape-button">{{.locale.Tr "repo.escape_control_characters"}}</a>
 					{{end}}
+					<button class="ui mini basic button compact tooltip" id="copy-file-content" data-content="{{.locale.Tr "copy_content"}}" aria-label="{{.locale.Tr "copy_content"}}"
+						{{if or (.IsMarkup) (.IsRenderedHTML) (not .IsTextSource)}}
+							disabled
+						{{end}}
+					>
+						{{svg "octicon-copy" 14}}
+					</button>
 				</div>
 				<a download href="{{$.RawFileLink}}"><span class="btn-octicon tooltip" data-content="{{.locale.Tr "repo.download_file"}}" data-position="bottom center">{{svg "octicon-download"}}</span></a>
 				{{if .Repository.CanEnableEditor}}

web_src/js/features/repo-code.js

@@ -1,9 +1,11 @@
 import $ from 'jquery';
 import {svg} from '../svg.js';
 import {invertFileFolding} from './file-fold.js';
-import {createTippy} from '../modules/tippy.js';
+import {createTippy, showTemporaryTooltip} from '../modules/tippy.js';
 import {copyToClipboard} from './clipboard.js';
 
+const {i18n} = window.config;
+
 function changeHash(hash) {
   if (window.history.pushState) {
     window.history.pushState(null, null, hash);
@@ -110,6 +112,18 @@ function showLineButton() {
   });
 }
 
+function initCopyFileContent() {
+  // get raw text for copy content button, at the moment, only one button (and one related file content) is supported.
+  const copyFileContent = document.querySelector('#copy-file-content');
+  if (!copyFileContent) return;
+
+  copyFileContent.addEventListener('click', async () => {
+    const text = Array.from(document.querySelectorAll('.file-view .lines-code')).map((el) => el.textContent).join('');
+    const success = await copyToClipboard(text);
+    showTemporaryTooltip(copyFileContent, success ? i18n.copy_success : i18n.copy_error);
+  });
+}
+
 export function initRepoCodeView() {
   if ($('.code-view .lines-num').length > 0) {
     $(document).on('click', '.lines-num span', function (e) {
@@ -185,4 +199,5 @@ export function initRepoCodeView() {
     if (!success) return;
     document.querySelector('.code-line-button')?._tippy?.hide();
   });
+  initCopyFileContent();
 }