feat(highlight): implement CurSearch highlight

Adds a `CurSearch` highlight group to highlight the current search result under the cursor.

2 files changed, 52 insertions, 2 deletions

diff --git a/test/functional/ui/cursor_spec.lua b/test/functional/ui/cursor_spec.lua
index 4c51547e2c..92300a8fa2 100644
--- a/test/functional/ui/cursor_spec.lua
+++ b/test/functional/ui/cursor_spec.lua
@@ -212,10 +212,10 @@ describe('ui/cursor', function()
         if m.blinkwait then m.blinkwait = 700 end
       end
       if m.hl_id then
-          m.hl_id = 61
+          m.hl_id = 62
           m.attr = {background = Screen.colors.DarkGray}
       end
-      if m.id_lm then m.id_lm = 62 end
+      if m.id_lm then m.id_lm = 63 end
     end
 
     -- Assert the new expectation.
diff --git a/test/functional/ui/searchhl_spec.lua b/test/functional/ui/searchhl_spec.lua
index 2e60930127..068a77a2e4 100644
--- a/test/functional/ui/searchhl_spec.lua
+++ b/test/functional/ui/searchhl_spec.lua
@@ -109,6 +109,56 @@ describe('search highlighting', function()
     ]])
   end)
 
+  it('works for match under cursor', function()
+    screen:set_default_attr_ids({
+        [1] = {background = Screen.colors.Yellow},
+        [2] = {foreground = Screen.colors.Gray100, background = Screen.colors.Gray0},
+        [3] = {foreground = Screen.colors.Red},
+    })
+
+    command('highlight CurSearch guibg=Black guifg=White')
+    insert([[
+      There is no way that a bee should be
+      able to fly. Its wings are too small
+      to get its fat little body off the
+      ground. The bee, of course, flies
+      anyway because bees don't care what
+      humans think is impossible.]])
+
+    feed('/bee<CR>')
+    screen:expect{grid=[[
+      There is no way that a {2:^bee} should be    |
+      able to fly. Its wings are too small    |
+      to get its fat little body off the      |
+      ground. The {1:bee}, of course, flies       |
+      anyway because {1:bee}s don't care what     |
+      humans think is impossible.             |
+      {3:search hit BOTTOM, continuing at TOP}    |
+    ]]}
+
+    feed('nn')
+    screen:expect{grid=[[
+      There is no way that a {1:bee} should be    |
+      able to fly. Its wings are too small    |
+      to get its fat little body off the      |
+      ground. The {1:bee}, of course, flies       |
+      anyway because {2:^bee}s don't care what     |
+      humans think is impossible.             |
+      /bee                                    |
+    ]]}
+
+    feed('N')
+    screen:expect{grid=[[
+      There is no way that a {1:bee} should be    |
+      able to fly. Its wings are too small    |
+      to get its fat little body off the      |
+      ground. The {2:^bee}, of course, flies       |
+      anyway because {1:bee}s don't care what     |
+      humans think is impossible.             |
+      ?bee                                    |
+    ]]}
+  end)
+
   it('highlights after EOL', function()
     insert("\n\n\n\n\n\n")