Scroll collapsed file into view (#23702)

web_src/css/repository.css

@@ -1867,6 +1867,13 @@
 .diff-file-box {
   border: 1px solid transparent;
   border-radius: var(--border-radius);
+  scroll-margin-top: 47px; /* match .repository .diff-detail-box */
+}
+
+@media (max-width: 991px) {
+  .diff-file-box {
+    scroll-margin-top: 77px; /* match .repository .diff-detail-box */
+  }
 }
 
 /* TODO: this can potentially be made "global" by removing the class prefix */

web_src/css/review.css

@@ -246,12 +246,12 @@ a.blob-excerpt:hover {
   display: none;
 }
 
-.pull.files.diff [id] {
+.pull.files.diff .comment {
   scroll-margin-top: 99px;
 }
 
 @media (max-width: 991px) {
-  .pull.files.diff [id] {
+  .pull.files.diff .comment {
     scroll-margin-top: 130px;
   }
 }

web_src/js/features/file-fold.js

@@ -8,6 +8,9 @@ import {svg} from '../svg.js';
 export function setFileFolding(fileContentBox, foldArrow, newFold) {
   foldArrow.innerHTML = svg(`octicon-chevron-${newFold ? 'right' : 'down'}`, 18);
   fileContentBox.setAttribute('data-folded', newFold);
+  if (newFold && fileContentBox.getBoundingClientRect().top < 0) {
+    fileContentBox.scrollIntoView();
+  }
 }
 
 // Like `setFileFolding`, except that it automatically inverts the current file folding state.