fix(paste): deal with eol and eof in Visual mode

runtime/lua/vim/_editor.lua

@@ -192,8 +192,19 @@ do
         if mode:find('^n') then  -- Normal mode
           vim.api.nvim_put(lines, 'c', true, false)
         else  -- Visual or Select mode
-          vim.api.nvim_command([[exe "normal! \<Del>"]])
+          vim.api.nvim_command([[exe "silent normal! \<Del>"]])
-          vim.api.nvim_put(lines, 'c', false, false)
+          local del_start = vim.fn.getpos("'[")
+          local cursor_pos = vim.fn.getpos('.')
+          if mode:find('^[VS]') then  -- linewise
+            if cursor_pos[2] < del_start[2] then  -- replacing lines at eof
+              -- create a new line
+              vim.api.nvim_put({''}, 'l', true, true)
+            end
+            vim.api.nvim_put(lines, 'c', false, false)
+          else
+            -- paste after cursor when replacing text at eol, otherwise paste before cursor
+            vim.api.nvim_put(lines, 'c', cursor_pos[3] < del_start[3], false)
+          end
         end
         -- put cursor at the end of the text instead of one character after it
         vim.fn.setpos('.', vim.fn.getpos("']"))

test/functional/api/vim_spec.lua

@@ -702,6 +702,42 @@ describe('API', function()
       feed('u')
       expect('||')
     end)
+    it('stream: Visual mode either end not at the end of a line', function()
+      feed('i|xxx<CR>xxx|<Esc>hvhk')
+      nvim('paste', 'aaaaaa', false, 1)
+      nvim('paste', 'bbbbbb', false, 2)
+      nvim('paste', 'cccccc', false, 2)
+      nvim('paste', 'dddddd', false, 3)
+      expect('|aaaaaabbbbbbccccccdddddd|')
+      feed('u')
+      expect([[
+        |xxx
+        xxx|]])
+    end)
+    it('stream: Visual mode cursor at the end of a line', function()
+      feed('i||xxx<CR>xxx<Esc>vko')
+      nvim('paste', 'aaaaaa', false, 1)
+      nvim('paste', 'bbbbbb', false, 2)
+      nvim('paste', 'cccccc', false, 2)
+      nvim('paste', 'dddddd', false, 3)
+      expect('||aaaaaabbbbbbccccccdddddd')
+      feed('u')
+      expect([[
+        ||xxx
+        xxx]])
+    end)
+    it('stream: Visual mode other end at the end of a line', function()
+      feed('i||xxx<CR>xxx<Esc>vk')
+      nvim('paste', 'aaaaaa', false, 1)
+      nvim('paste', 'bbbbbb', false, 2)
+      nvim('paste', 'cccccc', false, 2)
+      nvim('paste', 'dddddd', false, 3)
+      expect('||aaaaaabbbbbbccccccdddddd')
+      feed('u')
+      expect([[
+        ||xxx
+        xxx]])
+    end)
     it('non-streaming', function()
       -- With final "\n".
       nvim('paste', 'line 1\nline 2\nline 3\n', true, -1)