fix(paste): don't move cursor past the end of pasted text in Normal mode

runtime/lua/vim/_editor.lua

@@ -171,27 +171,34 @@ do
       vim.api.nvim_input(line1)
       vim.api.nvim_set_option('paste', false)
     elseif not is_cmdline then
-      if phase < 2 and mode:find('^[vV\22sS\19]') then
+      if mode:find('^i') or mode:find('^n?t') then  -- Insert mode or Terminal buffer
-        vim.api.nvim_command([[exe "normal! \<Del>"]])
         vim.api.nvim_put(lines, 'c', false, true)
-      elseif phase < 2 and not mode:find('^[iRt]') then
+      elseif phase < 2 and mode:find('^R') and not mode:find('^Rv') then  -- Replace mode
-        vim.api.nvim_put(lines, 'c', true, true)
+        -- TODO: implement Replace mode streamed pasting
-        -- XXX: Normal-mode: workaround bad cursor-placement after first chunk.
+        -- TODO: support Virtual Replace mode
-        vim.api.nvim_command('normal! a')
-      elseif phase < 2 and mode:find('^R') then
         local nchars = 0
         for _, line in ipairs(lines) do
-            nchars = nchars + line:len()
+          nchars = nchars + line:len()
         end
         local row, col = unpack(vim.api.nvim_win_get_cursor(0))
         local bufline = vim.api.nvim_buf_get_lines(0, row-1, row, true)[1]
         local firstline = lines[1]
         firstline = bufline:sub(1, col)..firstline
         lines[1] = firstline
+        -- FIXME: #lines can be 0
         lines[#lines] = lines[#lines]..bufline:sub(col + nchars + 1, bufline:len())
         vim.api.nvim_buf_set_lines(0, row-1, row, false, lines)
-      else
+      elseif mode:find('^[nvV\22sS\19]') then  -- Normal or Visual or Select mode
-        vim.api.nvim_put(lines, 'c', false, true)
+        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_put(lines, 'c', false, false)
+        end
+        -- put cursor at the end of the text instead of one character after it
+        vim.fn.setpos('.', vim.fn.getpos("']"))
+      else  -- Don't know what to do in other modes
+        return false
       end
     end
     if phase ~= -1 and (now - tdots >= 100) then

test/functional/api/vim_spec.lua

@@ -665,6 +665,43 @@ describe('API', function()
       feed('u')  -- Undo.
       expect(expected1)
     end)
+    it('stream: Insert mode', function()
+      feed('i')
+      nvim('paste', 'aaaaaa', false, 1)
+      nvim('paste', 'bbbbbb', false, 2)
+      nvim('paste', 'cccccc', false, 2)
+      nvim('paste', 'dddddd', false, 3)
+      expect('aaaaaabbbbbbccccccdddddd')
+    end)
+    it('stream: Normal mode on empty line', function()
+      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('')
+    end)
+    it('stream: Normal mode not at the end of a line', function()
+      feed('i||<Esc>0')
+      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('||')
+    end)
+    it('stream: Normal mode at the end of a line', function()
+      feed('i||<Esc>')
+      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('||')
+    end)
     it('non-streaming', function()
       -- With final "\n".
       nvim('paste', 'line 1\nline 2\nline 3\n', true, -1)

test/functional/terminal/tui_spec.lua

@@ -323,7 +323,7 @@ describe('TUI', function()
     feed_data('just paste it™')
     feed_data('\027[201~')
     screen:expect{grid=[[
-      thisjust paste it™{1:3} is here                       |
+      thisjust paste it{1:™}3 is here                       |
                                                         |
       {4:~                                                 }|
       {4:~                                                 }|
@@ -379,7 +379,7 @@ describe('TUI', function()
   end)
 
   it('paste: normal-mode (+CRLF #10872)', function()
-    feed_data(':set ruler')
+    feed_data(':set ruler | echo')
     wait_for_mode('c')
     feed_data('\n')
     wait_for_mode('n')
@@ -423,13 +423,13 @@ describe('TUI', function()
     expect_child_buf_lines(expected_crlf)
     feed_data('u')
     expect_child_buf_lines({''})
+    feed_data(':echo')
+    wait_for_mode('c')
+    feed_data('\n')
+    wait_for_mode('n')
     -- CRLF input
     feed_data('\027[200~'..table.concat(expected_lf,'\r\n')..'\027[201~')
-    screen:expect{
+    screen:expect{grid=expected_grid1, attr_ids=expected_attr}
-      grid=expected_grid1:gsub(
-        ':set ruler *',
-        '3 fewer lines; before #1  0 seconds ago           '),
-      attr_ids=expected_attr}
     expect_child_buf_lines(expected_crlf)
   end)