Set up basic keyboard next/previous navigation in diff list

Mousetrap is used as the help-tool to listen to keystrokes

Added currentDiffIndex getter to store that holds
the index of currently active diff file in the list

Instead of computing it on the component, we will take advantage of it
being available for all components in DiffsApp

Testing keyboard navigation and jumpToFile()

1 files changed, 2 insertions, 2 deletions

diff --git a/app/assets/javascripts/diffs/store/actions.js b/app/assets/javascripts/diffs/store/actions.js
index 82ff2e3be76..c40775c3259 100644
--- a/app/assets/javascripts/diffs/store/actions.js
+++ b/app/assets/javascripts/diffs/store/actions.js
@@ -52,7 +52,9 @@ export const fetchDiffFiles = ({ state, commit }) => {
 };
 
 export const setHighlightedRow = ({ commit }, lineCode) => {
+  const fileHash = lineCode.split('_')[0];
   commit(types.SET_HIGHLIGHTED_ROW, lineCode);
+  commit(types.UPDATE_CURRENT_DIFF_FILE_ID, fileHash);
 };
 
 // This is adding line discussions to the actual lines in the diff tree
@@ -262,8 +264,6 @@ export const scrollToFile = ({ state, commit }, path) => {
   document.location.hash = fileHash;
 
   commit(types.UPDATE_CURRENT_DIFF_FILE_ID, fileHash);
-
-  setTimeout(() => commit(types.UPDATE_CURRENT_DIFF_FILE_ID, ''), 1000);
 };
 
 export const toggleShowTreeList = ({ commit, state }) => {