feat(actions): added select_{prev|next}_commit (#512)

Co-authored-by: Sindre T. Strøm <sindrets@gmail.com>

Author: yungthai

doc/diffview.txt

@@ -1165,12 +1165,12 @@ select_entry                                    *diffview-actions-select_entry*
         multiple files, this will collapse or open the entry. In the option
         panel this will interact with the option under the cursor.
 
-select_next_entry                               *diffview-actions-select_next_entry*
+[count] select_next_entry                       *diffview-actions-select_next_entry*
         Contexts: `view`, `file_panel`, `file_history_panel`
 
         Select the entry following the subject.
 
-select_prev_entry                               *diffview-actions-select_prev_entry*
+[count] select_prev_entry                       *diffview-actions-select_prev_entry*
         Contexts: `view`, `file_panel`, `file_history_panel`
 
         Select the entry preceding the subject.
@@ -1185,6 +1185,16 @@ select_last_entry                               *diffview-actions-select_last_en
 
         Select the last entry.
 
+[count] select_next_commit                      *diffview-actions-select_next_commit*
+        Contexts: `file_history_view`, `file_history_panel`
+
+        Select the commit following the subject.
+
+[count] select_prev_commit                      *diffview-actions-select_prev_commit*
+        Contexts: `file_history_view`, `file_history_panel`
+
+        Select the commit preceding the subject.
+
 stage_all                                       *diffview-actions-stage_all*
         Contexts: `diff_view`, `file_panel`
 

lua/diffview/actions.lua

@@ -637,6 +637,8 @@ local action_names = {
   "select_prev_entry",
   "select_first_entry",
   "select_last_entry",
+  "select_next_commit",
+  "select_prev_commit",
   "stage_all",
   "toggle_files",
   "toggle_flatten_dirs",

lua/diffview/scene/views/file_history/file_history_view.lua

@@ -170,8 +170,13 @@ FileHistoryView.set_file = async.void(function(self, file, focus)
   if self:file_safeguard() or not file then return end
 
   local entry = self.panel:find_entry(file)
+  local cur_entry = self.panel.cur_item[1]
 
   if entry then
+    if cur_entry and entry ~= cur_entry then
+      self.panel:set_entry_fold(cur_entry, false)
+    end
+
     self.panel:set_cur_item({ entry, file })
     self.panel:highlight_item(file)
     self.nulled = false

lua/diffview/scene/views/file_history/listeners.lua

@@ -71,6 +71,26 @@ return function(view)
         view:set_file(entry.files[#entry.files])
       end
     end,
+    select_next_commit = function()
+      local cur_entry = view.panel.cur_item[1]
+      if not cur_entry then return end
+      local entry_idx = utils.vec_indexof(view.panel.entries, cur_entry)
+      if entry_idx == -1 then return end
+
+      local next_idx = (entry_idx + vim.v.count1 - 1) % #view.panel.entries + 1
+      local next_entry = view.panel.entries[next_idx]
+      view:set_file(next_entry.files[1])
+    end,
+    select_prev_commit = function()
+      local cur_entry = view.panel.cur_item[1]
+      if not cur_entry then return end
+      local entry_idx = utils.vec_indexof(view.panel.entries, cur_entry)
+      if entry_idx == -1 then return end
+
+      local next_idx = (entry_idx - vim.v.count1 - 1) % #view.panel.entries + 1
+      local next_entry = view.panel.entries[next_idx]
+      view:set_file(next_entry.files[1])
+    end,
     next_entry = function()
       view.panel:highlight_next_file()
     end,