Merge pull request #16936 from zeertzjq/no-escape-csi

input: never escape CSI bytes and clean up related names and comments

test/functional/api/vim_spec.lua

@@ -1367,18 +1367,18 @@ describe('API', function()
   end)
 
   describe('nvim_feedkeys', function()
-    it('CSI escaping', function()
+    it('K_SPECIAL escaping', function()
       local function on_setup()
         -- notice the special char(…) \xe2\80\xa6
         nvim('feedkeys', ':let x1="…"\n', '', true)
 
         -- Both nvim_replace_termcodes and nvim_feedkeys escape \x80
         local inp = helpers.nvim('replace_termcodes', ':let x2="…"<CR>', true, true, true)
-        nvim('feedkeys', inp, '', true)   -- escape_csi=true
+        nvim('feedkeys', inp, '', true)   -- escape_ks=true
 
-        -- nvim_feedkeys with CSI escaping disabled
+        -- nvim_feedkeys with K_SPECIAL escaping disabled
         inp = helpers.nvim('replace_termcodes', ':let x3="…"<CR>', true, true, true)
-        nvim('feedkeys', inp, '', false)  -- escape_csi=false
+        nvim('feedkeys', inp, '', false)  -- escape_ks=false
 
         helpers.stop()
       end

test/functional/ui/input_spec.lua

@@ -114,11 +114,30 @@ describe('mappings', function()
   end)
 end)
 
-describe('input utf sequences that contain CSI/K_SPECIAL', function()
+describe('input utf sequences that contain K_SPECIAL (0x80)', function()
   it('ok', function()
     feed('i…<esc>')
     expect('…')
   end)
+
+  it('can be mapped', function()
+    command('inoremap … E280A6')
+    feed('i…<esc>')
+    expect('E280A6')
+  end)
+end)
+
+describe('input utf sequences that contain CSI (0x9B)', function()
+  it('ok', function()
+    feed('iě<esc>')
+    expect('ě')
+  end)
+
+  it('can be mapped', function()
+    command('inoremap ě C49B')
+    feed('iě<esc>')
+    expect('C49B')
+  end)
 end)
 
 describe('input non-printable chars', function()