vim-patch:7.4.686 #3629

Problem:    "zr" and "zm" do not take a count.
Solution:   Implement the count, restrict the fold level to the maximum
            nesting depth.  (Marcin Szamotulski)

https://github.com/vim/vim/commit/7d2757a47204d00cd47e3db94f1bd248c499d4e3

runtime/doc/fold.txt

@@ -362,7 +362,7 @@ zX		Undo manually opened and closed folds: re-apply 'foldlevel'.
 		Also forces recomputing folds, like |zx|.
 
 							*zm*
-zm		Fold more: Subtract one from 'foldlevel'.  If 'foldlevel' was
+zm		Fold more: Subtract |v:count1| from 'foldlevel'.  If 'foldlevel' was
 		already zero nothing happens.
 		'foldenable' will be set.
 
@@ -371,7 +371,7 @@ zM		Close all folds: set 'foldlevel' to 0.
 		'foldenable' will be set.
 
 							*zr*
-zr		Reduce folding: Add one to 'foldlevel'.
+zr		Reduce folding: Add |v:count1| to 'foldlevel'.
 
 							*zR*
 zR		Open all folds.  This sets 'foldlevel' to highest fold level.

src/nvim/normal.c

@@ -4253,8 +4253,13 @@ dozet:
     break;
 
   /* "zm": fold more */
-  case 'm':   if (curwin->w_p_fdl > 0)
-      --curwin->w_p_fdl;
+  case 'm':
+    if (curwin->w_p_fdl > 0) {
+      curwin->w_p_fdl -= cap->count1;
+      if (curwin->w_p_fdl < 0) {
+        curwin->w_p_fdl = 0;
+      }
+    }
     old_fdl = -1;                       /* force an update */
     curwin->w_p_fen = true;
     break;
@@ -4266,7 +4271,14 @@ dozet:
     break;
 
   /* "zr": reduce folding */
-  case 'r':   ++curwin->w_p_fdl;
+  case 'r':
+    curwin->w_p_fdl += cap->count1;
+    {
+      int d = getDeepestNesting();
+      if (curwin->w_p_fdl >= d) {
+        curwin->w_p_fdl = d;
+      }
+    }
     break;
 
   /* "zR": open all folds */

src/nvim/version.c

@@ -238,7 +238,7 @@ static int included_patches[] = {
   // 689,
   // 688,
   // 687 NA
-  // 686,
+  686,
   // 685,
   // 684,
   // 683 NA