Merge remote-tracking branch 'upstream/master' into aucmd_textputpostaucmd_textputpost

1 files changed, 1193 insertions, 0 deletions

diff --git a/test/functional/legacy/scroll_opt_spec.lua b/test/functional/legacy/scroll_opt_spec.lua
new file mode 100644
index 0000000000..8ac1141c2b
--- /dev/null
+++ b/test/functional/legacy/scroll_opt_spec.lua
@@ -0,0 +1,1193 @@
+local helpers = require('test.functional.helpers')(after_each)
+local Screen = require('test.functional.ui.screen')
+local clear = helpers.clear
+local exec = helpers.exec
+local feed = helpers.feed
+local assert_alive = helpers.assert_alive
+
+before_each(clear)
+
+describe('smoothscroll', function()
+  local screen
+
+  before_each(function()
+    screen = Screen.new(40, 12)
+    screen:attach()
+  end)
+
+  -- oldtest: Test_CtrlE_CtrlY_stop_at_end()
+  it('disabled does not break <C-E> and <C-Y> stop at end', function()
+    exec([[
+      enew
+      call setline(1, ['one', 'two'])
+      set number
+    ]])
+    feed('<C-Y>')
+    screen:expect({any = "  1 ^one"})
+    feed('<C-E><C-E><C-E>')
+    screen:expect({any = "  2 ^two"})
+  end)
+
+  -- oldtest: Test_smoothscroll_CtrlE_CtrlY()
+  it('works with <C-E> and <C-E>', function()
+    exec([[
+      call setline(1, [ 'line one', 'word '->repeat(20), 'line three', 'long word '->repeat(7), 'line', 'line', 'line', ])
+      set smoothscroll scrolloff=5
+      :5
+    ]])
+    local s1 = [[
+      word word word word word word word word |
+      word word word word word word word word |
+      word word word word                     |
+      line three                              |
+      long word long word long word long word |
+      long word long word long word           |
+      ^line                                    |
+      line                                    |
+      line                                    |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]]
+    local s2 = [[
+      <<<d word word word word word word word |
+      word word word word                     |
+      line three                              |
+      long word long word long word long word |
+      long word long word long word           |
+      ^line                                    |
+      line                                    |
+      line                                    |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]]
+    local s3 = [[
+      <<<d word word word                     |
+      line three                              |
+      long word long word long word long word |
+      long word long word long word           |
+      ^line                                    |
+      line                                    |
+      line                                    |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]]
+    local s4 = [[
+      line three                              |
+      long word long word long word long word |
+      long word long word long word           |
+      line                                    |
+      line                                    |
+      ^line                                    |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]]
+    local s5 = [[
+      <<<d word word word                     |
+      line three                              |
+      long word long word long word long word |
+      long word long word long word           |
+      line                                    |
+      line                                    |
+      ^line                                    |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]]
+    local s6 = [[
+      <<<d word word word word word word word |
+      word word word word                     |
+      line three                              |
+      long word long word long word long word |
+      long word long word long word           |
+      line                                    |
+      line                                    |
+      ^line                                    |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]]
+    local s7 = [[
+      word word word word word word word word |
+      word word word word word word word word |
+      word word word word                     |
+      line three                              |
+      long word long word long word long word |
+      long word long word long word           |
+      line                                    |
+      line                                    |
+      ^line                                    |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]]
+    local s8 = [[
+      line one                                |
+      word word word word word word word word |
+      word word word word word word word word |
+      word word word word                     |
+      line three                              |
+      long word long word long word long word |
+      long word long word long word           |
+      line                                    |
+      line                                    |
+      ^line                                    |
+      ~                                       |
+                                              |
+    ]]
+    feed('<C-E>')
+    screen:expect(s1)
+    feed('<C-E>')
+    screen:expect(s2)
+    feed('<C-E>')
+    screen:expect(s3)
+    feed('<C-E>')
+    screen:expect(s4)
+    feed('<C-Y>')
+    screen:expect(s5)
+    feed('<C-Y>')
+    screen:expect(s6)
+    feed('<C-Y>')
+    screen:expect(s7)
+    feed('<C-Y>')
+    screen:expect(s8)
+    exec('set foldmethod=indent')
+    -- move the cursor so we can reuse the same dumps
+    feed('5G<C-E>')
+    screen:expect(s1)
+    feed('<C-E>')
+    screen:expect(s2)
+    feed('7G<C-Y>')
+    screen:expect(s7)
+    feed('<C-Y>')
+    screen:expect(s8)
+  end)
+
+  -- oldtest: Test_smoothscroll_multibyte()
+  it('works with multibyte characters', function()
+    screen:try_resize(40, 6)
+    exec([[
+      set scrolloff=0 smoothscroll
+      call setline(1, [repeat('ϛ', 45), repeat('2', 36)])
+      exe "normal G35l\<C-E>k"
+    ]])
+    screen:expect([[
+      ϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛϛ^ϛϛϛϛϛ|
+      ϛϛϛϛϛ                                   |
+      222222222222222222222222222222222222    |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_number()
+  it("works 'number' and 'cpo'+=n", function()
+    exec([[
+      call setline(1, [ 'one ' .. 'word '->repeat(20), 'two ' .. 'long word '->repeat(7), 'line', 'line', 'line', ])
+      set smoothscroll scrolloff=5
+      set splitkeep=topline
+      set number cpo+=n
+      :3
+      func g:DoRel()
+        set number relativenumber scrolloff=0
+        :%del
+        call setline(1, [ 'one', 'very long text '->repeat(12), 'three', ])
+        exe "normal 2Gzt\<C-E>"
+      endfunc
+    ]])
+    screen:expect([[
+        1 one word word word word word word wo|
+      rd word word word word word word word wo|
+      rd word word word word word             |
+        2 two long word long word long word lo|
+      ng word long word long word long word   |
+        3 ^line                                |
+        4 line                                |
+        5 line                                |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+      <<<word word word word word word word wo|
+      rd word word word word word             |
+        2 two long word long word long word lo|
+      ng word long word long word long word   |
+        3 ^line                                |
+        4 line                                |
+        5 line                                |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+      <<<word word word word word             |
+        2 two long word long word long word lo|
+      ng word long word long word long word   |
+        3 ^line                                |
+        4 line                                |
+        5 line                                |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    exec('set cpo-=n')
+    screen:expect([[
+      <<< d word word word word word word     |
+        2 two long word long word long word lo|
+          ng word long word long word long wor|
+          d                                   |
+        3 ^line                                |
+        4 line                                |
+        5 line                                |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    feed('<C-Y>')
+    screen:expect([[
+      <<< rd word word word word word word wor|
+          d word word word word word word     |
+        2 two long word long word long word lo|
+          ng word long word long word long wor|
+          d                                   |
+        3 ^line                                |
+        4 line                                |
+        5 line                                |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    feed('<C-Y>')
+    screen:expect([[
+        1 one word word word word word word wo|
+          rd word word word word word word wor|
+          d word word word word word word     |
+        2 two long word long word long word lo|
+          ng word long word long word long wor|
+          d                                   |
+        3 ^line                                |
+        4 line                                |
+        5 line                                |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    exec('botright split')
+    feed('gg')
+    screen:expect([[
+        1 one word word word word word word wo|
+          rd word word word word word word wor|
+          d word word word word word word     |
+        2 two long word long word long word@@@|
+      [No Name] [+]                           |
+        1 ^one word word word word word word wo|
+          rd word word word word word word wor|
+          d word word word word word word     |
+        2 two long word long word long word lo|
+          ng word long word long word long @@@|
+      [No Name] [+]                           |
+                                              |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+        1 one word word word word word word wo|
+          rd word word word word word word wor|
+          d word word word word word word     |
+        2 two long word long word long word@@@|
+      [No Name] [+]                           |
+      <<< rd word word word word word word wor|
+          d word word word word word word^     |
+        2 two long word long word long word lo|
+          ng word long word long word long wor|
+          d                                   |
+      [No Name] [+]                           |
+                                              |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+        1 one word word word word word word wo|
+          rd word word word word word word wor|
+          d word word word word word word     |
+        2 two long word long word long word@@@|
+      [No Name] [+]                           |
+      <<< d word word word word word word^     |
+        2 two long word long word long word lo|
+          ng word long word long word long wor|
+          d                                   |
+        3 line                                |
+      [No Name] [+]                           |
+                                              |
+    ]])
+    exec('close')
+    exec('call DoRel()')
+    screen:expect([[
+      2<<<^ong text very long text very long te|
+          xt very long text very long text ver|
+          y long text very long text very long|
+           text very long text very long text |
+        1 three                               |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      --No lines in buffer--                  |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_list()
+  it("works with list mode", function()
+    screen:try_resize(40, 8)
+    exec([[
+      set smoothscroll scrolloff=0
+      set list
+      call setline(1, [ 'one', 'very long text '->repeat(12), 'three', ])
+      exe "normal 2Gzt\<C-E>"
+    ]])
+    screen:expect([[
+      <<<t very long text very long text very |
+      ^long text very long text very long text |
+      very long text very long text very long |
+      text very long text-                    |
+      three                                   |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    exec('set listchars+=precedes:#')
+    screen:expect([[
+      #ext very long text very long text very |
+      ^long text very long text very long text |
+      very long text very long text very long |
+      text very long text-                    |
+      three                                   |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_diff_mode()
+  it("works with diff mode", function()
+    screen:try_resize(40, 8)
+    exec([[
+      let text = 'just some text here'
+      call setline(1, text)
+      set smoothscroll
+      diffthis
+      new
+      call setline(1, text)
+      set smoothscroll
+      diffthis
+    ]])
+    screen:expect([[
+      - ^just some text here                   |
+      ~                                       |
+      ~                                       |
+      [No Name] [+]                           |
+      - just some text here                   |
+      ~                                       |
+      [No Name] [+]                           |
+                                              |
+    ]])
+    feed('<C-Y>')
+    screen:expect_unchanged()
+    feed('<C-E>')
+    screen:expect_unchanged()
+  end)
+
+  -- oldtest: Test_smoothscroll_wrap_scrolloff_zero()
+  it("works with zero 'scrolloff'", function()
+    screen:try_resize(40, 8)
+    exec([[
+      call setline(1, ['Line' .. (' with some text'->repeat(7))]->repeat(7))
+      set smoothscroll scrolloff=0 display=
+      :3
+    ]])
+    screen:expect([[
+      <<<h some text with some text           |
+      Line with some text with some text with |
+      some text with some text with some text |
+      with some text with some text           |
+      ^Line with some text with some text with |
+      some text with some text with some text |
+      with some text with some text           |
+                                              |
+    ]])
+    feed('j')
+    screen:expect_unchanged()
+    -- moving cursor down - whole bottom line shows
+    feed('<C-E>j')
+    screen:expect_unchanged()
+    feed('G')
+    screen:expect_unchanged()
+    feed('4<C-Y>G')
+    screen:expect_unchanged()
+    -- moving cursor up right after the <<< marker - no need to show whole line
+    feed('2gj3l2k')
+    screen:expect([[
+      <<<^h some text with some text           |
+      Line with some text with some text with |
+      some text with some text with some text |
+      with some text with some text           |
+      Line with some text with some text with |
+      some text with some text with some text |
+      with some text with some text           |
+                                              |
+    ]])
+    -- moving cursor up where the <<< marker is - whole top line shows
+    feed('2j02k')
+    screen:expect([[
+      ^Line with some text with some text with |
+      some text with some text with some text |
+      with some text with some text           |
+      Line with some text with some text with |
+      some text with some text with some text |
+      with some text with some text           |
+      @                                       |
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_wrap_long_line()
+  it("adjusts the cursor position in a long line", function()
+    screen:try_resize(40, 6)
+    exec([[
+      call setline(1, ['one', 'two', 'Line' .. (' with lots of text'->repeat(30)) .. ' end', 'four'])
+      set smoothscroll scrolloff=0
+      normal 3G10|zt
+    ]])
+    -- scrolling up, cursor moves screen line down
+    screen:expect([[
+      Line with^ lots of text with lots of text|
+       with lots of text with lots of text wit|
+      h lots of text with lots of text with lo|
+      ts of text with lots of text with lots o|
+      f text with lots of text with lots of te|
+                                              |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+      <<<th lot^s of text with lots of text wit|
+      h lots of text with lots of text with lo|
+      ts of text with lots of text with lots o|
+      f text with lots of text with lots of te|
+      xt with lots of text with lots of text w|
+                                              |
+    ]])
+    feed('5<C-E>')
+    screen:expect([[
+      <<< lots ^of text with lots of text with |
+      lots of text with lots of text with lots|
+       of text with lots of text with lots of |
+      text with lots of text with lots of text|
+       with lots of text with lots of text wit|
+                                              |
+    ]])
+    -- scrolling down, cursor moves screen line up
+    feed('5<C-Y>')
+    screen:expect([[
+      <<<th lots of text with lots of text wit|
+      h lots of text with lots of text with lo|
+      ts of text with lots of text with lots o|
+      f text with lots of text with lots of te|
+      xt with l^ots of text with lots of text w|
+                                              |
+    ]])
+    feed('<C-Y>')
+    screen:expect([[
+      Line with lots of text with lots of text|
+       with lots of text with lots of text wit|
+      h lots of text with lots of text with lo|
+      ts of text with lots of text with lots o|
+      f text wi^th lots of text with lots of te|
+                                              |
+    ]])
+    -- 'scrolloff' set to 1, scrolling up, cursor moves screen line down
+    exec('set scrolloff=1')
+    feed('10|<C-E>')
+    screen:expect([[
+      <<<th lots of text with lots of text wit|
+      h lots of^ text with lots of text with lo|
+      ts of text with lots of text with lots o|
+      f text with lots of text with lots of te|
+      xt with lots of text with lots of text w|
+                                              |
+    ]])
+    -- 'scrolloff' set to 1, scrolling down, cursor moves screen line up
+    feed('<C-E>gjgj<C-Y>')
+    screen:expect([[
+      <<<th lots of text with lots of text wit|
+      h lots of text with lots of text with lo|
+      ts of text with lots of text with lots o|
+      f text wi^th lots of text with lots of te|
+      xt with lots of text with lots of text w|
+                                              |
+    ]])
+    -- 'scrolloff' set to 2, scrolling up, cursor moves screen line down
+    exec('set scrolloff=2')
+    feed('10|<C-E>')
+    screen:expect([[
+      <<<th lots of text with lots of text wit|
+      h lots of text with lots of text with lo|
+      ts of tex^t with lots of text with lots o|
+      f text with lots of text with lots of te|
+      xt with lots of text with lots of text w|
+                                              |
+    ]])
+    -- 'scrolloff' set to 2, scrolling down, cursor moves screen line up
+    feed('<C-E>gj<C-Y>')
+    screen:expect_unchanged()
+    -- 'scrolloff' set to 0, move cursor down one line. Cursor should move properly,
+    -- and since this is a really long line, it will be put on top of the screen.
+    exec('set scrolloff=0')
+    feed('0j')
+    screen:expect([[
+      <<<th lots of text with lots of text wit|
+      h lots of text with lots of text with lo|
+      ts of text with lots of text with lots o|
+      f text with lots of text end            |
+      ^four                                    |
+                                              |
+    ]])
+    -- Test zt/zz/zb that they work properly when a long line is above it
+    feed('zt')
+    screen:expect([[
+      ^four                                    |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    feed('zz')
+    screen:expect([[
+      <<<of text with lots of text with lots o|
+      f text with lots of text end            |
+      ^four                                    |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    feed('zb')
+    screen:expect([[
+      <<<th lots of text with lots of text wit|
+      h lots of text with lots of text with lo|
+      ts of text with lots of text with lots o|
+      f text with lots of text end            |
+      ^four                                    |
+                                              |
+    ]])
+    -- Repeat the step and move the cursor down again.
+    -- This time, use a shorter long line that is barely long enough to span more
+    -- than one window. Note that the cursor is at the bottom this time because
+    -- Vim prefers to do so if we are scrolling a few lines only.
+    exec("call setline(1, ['one', 'two', 'Line' .. (' with lots of text'->repeat(10)) .. ' end', 'four'])")
+    -- Currently visible lines were replaced, test that the lines and cursor
+    -- are correctly displayed.
+    screen:expect_unchanged()
+    feed('3Gztj')
+    screen:expect_unchanged()
+    -- Repeat the step but this time start it when the line is smooth-scrolled by
+    -- one line. This tests that the offset calculation is still correct and
+    -- still end up scrolling down to the next line with cursor at bottom of
+    -- screen.
+    feed('3Gzt<C-E>j')
+    screen:expect([[
+      <<<th lots of text with lots of text wit|
+      h lots of text with lots of text with lo|
+      ts of text with lots of text with lots o|
+      f text with lots of text end            |
+      fou^r                                    |
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_one_long_line()
+  it("scrolls correctly when moving the cursor", function()
+    screen:try_resize(40, 6)
+    exec([[
+      call setline(1, 'with lots of text '->repeat(7))
+      set smoothscroll scrolloff=0
+    ]])
+    local s1 = [[
+      ^with lots of text with lots of text with|
+       lots of text with lots of text with lot|
+      s of text with lots of text with lots of|
+       text                                   |
+      ~                                       |
+                                              |
+    ]]
+    screen:expect(s1)
+    feed('<C-E>')
+    screen:expect([[
+      <<<ts of text with lots of text with lot|
+      ^s of text with lots of text with lots of|
+       text                                   |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    feed('0')
+    screen:expect(s1)
+  end)
+
+  -- oldtest: Test_smoothscroll_long_line_showbreak()
+  it("cursor is not one screen line too far down", function()
+    screen:try_resize(40, 6)
+    -- a line that spans four screen lines
+    exec("call setline(1, 'with lots of text in one line '->repeat(6))")
+    exec('set smoothscroll scrolloff=0 showbreak=+++\\ ')
+    local s1 = [[
+      ^with lots of text in one line with lots |
+      +++ of text in one line with lots of tex|
+      +++ t in one line with lots of text in o|
+      +++ ne line with lots of text in one lin|
+      +++ e with lots of text in one line     |
+                                              |
+    ]]
+    screen:expect(s1)
+    feed('<C-E>')
+    screen:expect([[
+      +++ ^of text in one line with lots of tex|
+      +++ t in one line with lots of text in o|
+      +++ ne line with lots of text in one lin|
+      +++ e with lots of text in one line     |
+      ~                                       |
+                                              |
+    ]])
+    feed('0')
+    screen:expect(s1)
+  end)
+
+  -- oldtest: Test_smoothscroll_marker_over_double_width_dump()
+  it('marker is drawn over double-width char correctly', function()
+    screen:try_resize(40, 6)
+    exec([[
+      call setline(1, 'a'->repeat(&columns) .. '口'->repeat(10))
+      setlocal smoothscroll
+    ]])
+    screen:expect([[
+      ^aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa|
+      口口口口口口口口口口                    |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+      <<< 口口口口口口口^口                    |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+      ~                                       |
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_zero_width()
+  it("does not divide by zero with a narrow window", function()
+    screen:try_resize(12, 2)
+    screen:set_default_attr_ids({
+      [1] = {foreground = Screen.colors.Brown},
+      [2] = {foreground = Screen.colors.Blue1, bold = true},
+    })
+    exec([[
+      call setline(1, ['a'->repeat(100)])
+      set wrap smoothscroll number laststatus=0
+      wincmd v
+      wincmd v
+      wincmd v
+      wincmd v
+    ]])
+    screen:expect([[
+      {1:  1^ }│{1: }│{1: }│{1: }│{1: }|
+                  |
+    ]])
+    feed('llllllllll<C-W>o')
+    screen:expect([[
+      {2:<<<}{1: }aa^aaaaaa|
+                  |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_ins_lines()
+  it("does not unnecessarily insert lines", function()
+    screen:try_resize(40, 6)
+    exec([=[
+      set wrap smoothscroll scrolloff=0 conceallevel=2 concealcursor=nc
+      call setline(1, [
+        \'line one' .. 'with lots of text in one line '->repeat(2),
+        \'line two',
+        \'line three',
+        \'line four',
+        \'line five'
+      \])
+    ]=])
+    feed('<C-E>gjgk')
+    screen:expect([[
+      <<<lots of text in one line^             |
+      line two                                |
+      line three                              |
+      line four                               |
+      line five                               |
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_cursormoved_line()
+  it("does not place the cursor in the command line", function()
+    screen:try_resize(40, 6)
+    exec([=[
+      set smoothscroll
+      call setline(1, [
+        \'',
+        \'_'->repeat(&lines * &columns),
+        \(('_')->repeat(&columns - 2) .. 'xxx')->repeat(2)
+      \])
+      autocmd CursorMoved * eval [line('w0'), line('w$')]
+      call search('xxx')
+    ]=])
+    screen:expect([[
+      <<<_____________________________________|
+      ________________________________________|
+      ______________________________________^xx|
+      x______________________________________x|
+      xx                                      |
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_eob()
+  it("does not scroll halfway at end of buffer", function()
+    screen:try_resize(40, 10)
+    exec([[
+      set smoothscroll
+      call setline(1, ['']->repeat(100))
+      norm G
+    ]])
+    -- does not scroll halfway when scrolling to end of buffer
+    screen:expect([[
+                                              |
+                                              |
+                                              |
+                                              |
+                                              |
+                                              |
+                                              |
+                                              |
+      ^                                        |
+                                              |
+    ]])
+    exec("call setline(92, 'a'->repeat(100))")
+    feed('<C-B>G')
+    -- cursor is not placed below window
+    screen:expect([[
+      <<<aaaaaaaaaaaaaaaaa                    |
+                                              |
+                                              |
+                                              |
+                                              |
+                                              |
+                                              |
+                                              |
+      ^                                        |
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_incsearch()
+  it("does not reset skipcol when doing incremental search on the same word", function()
+    screen:try_resize(40, 8)
+    screen:set_default_attr_ids({
+      [1] = {foreground = Screen.colors.Brown},
+      [2] = {foreground = Screen.colors.Blue1, bold = true},
+      [3] = {background = Screen.colors.Yellow1},
+      [4] = {reverse = true},
+    })
+    exec([[
+      set smoothscroll number scrolloff=0 incsearch
+      call setline(1, repeat([''], 20))
+      call setline(11, repeat('a', 100))
+      call setline(14, 'bbbb')
+    ]])
+    feed('/b')
+    screen:expect([[
+      {2:<<<}{1: }aaaaaaaaaaaaaaaaaaaaaaaaaaaa        |
+      {1: 12 }                                    |
+      {1: 13 }                                    |
+      {1: 14 }{4:b}{3:bbb}                                |
+      {1: 15 }                                    |
+      {1: 16 }                                    |
+      {1: 17 }                                    |
+      /b^                                      |
+    ]])
+    feed('b')
+    screen:expect([[
+      {2:<<<}{1: }aaaaaaaaaaaaaaaaaaaaaaaaaaaa        |
+      {1: 12 }                                    |
+      {1: 13 }                                    |
+      {1: 14 }{4:bb}{3:bb}                                |
+      {1: 15 }                                    |
+      {1: 16 }                                    |
+      {1: 17 }                                    |
+      /bb^                                     |
+    ]])
+    feed('b')
+    screen:expect([[
+      {2:<<<}{1: }aaaaaaaaaaaaaaaaaaaaaaaaaaaa        |
+      {1: 12 }                                    |
+      {1: 13 }                                    |
+      {1: 14 }{4:bbb}b                                |
+      {1: 15 }                                    |
+      {1: 16 }                                    |
+      {1: 17 }                                    |
+      /bbb^                                    |
+    ]])
+    feed('b')
+    screen:expect([[
+      {2:<<<}{1: }aaaaaaaaaaaaaaaaaaaaaaaaaaaa        |
+      {1: 12 }                                    |
+      {1: 13 }                                    |
+      {1: 14 }{4:bbbb}                                |
+      {1: 15 }                                    |
+      {1: 16 }                                    |
+      {1: 17 }                                    |
+      /bbbb^                                   |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_multi_skipcol()
+  it('scrolling multiple lines and stopping at non-zero skipcol', function()
+    screen:try_resize(40, 10)
+    screen:set_default_attr_ids({
+      [0] = {foreground = Screen.colors.Blue, bold = true},
+      [1] = {background = Screen.colors.Grey90},
+    })
+    exec([[
+      setlocal cursorline scrolloff=0 smoothscroll
+      call setline(1, repeat([''], 8))
+      call setline(3, repeat('a', 50))
+      call setline(4, repeat('a', 50))
+      call setline(7, 'bbb')
+      call setline(8, 'ccc')
+      redraw
+    ]])
+    screen:expect([[
+      {1:^                                        }|
+                                              |
+      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa|
+      aaaaaaaaaa                              |
+      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa|
+      aaaaaaaaaa                              |
+                                              |
+                                              |
+      bbb                                     |
+                                              |
+    ]])
+    feed('3<C-E>')
+    screen:expect([[
+      {0:<<<}{1:aaaaaa^a                              }|
+      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa|
+      aaaaaaaaaa                              |
+                                              |
+                                              |
+      bbb                                     |
+      ccc                                     |
+      {0:~                                       }|
+      {0:~                                       }|
+                                              |
+    ]])
+    feed('2<C-E>')
+    screen:expect([[
+      {0:<<<}{1:aaaaaa^a                              }|
+                                              |
+                                              |
+      bbb                                     |
+      ccc                                     |
+      {0:~                                       }|
+      {0:~                                       }|
+      {0:~                                       }|
+      {0:~                                       }|
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_zero_width_scroll_cursor_bot()
+  it('does not divide by zero in zero-width window', function()
+    screen:try_resize(40, 19)
+    screen:set_default_attr_ids({
+      [1] = {foreground = Screen.colors.Brown};  -- LineNr
+      [2] = {bold = true, foreground = Screen.colors.Blue};  -- NonText
+      [3] = {bold = true, reverse = true};  -- StatusLine
+      [4] = {reverse = true};  -- StatusLineNC
+    })
+    exec([[
+      silent normal yy
+      silent normal 19p
+      set cpoptions+=n
+      vsplit
+      vertical resize 0
+      set foldcolumn=1
+      set number
+      set smoothscroll
+      silent normal 20G
+    ]])
+    screen:expect([[
+      {1: }│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:@}│                                      |
+      {2:^@}│                                      |
+      {3:< }{4:[No Name] [+]                         }|
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_cursor_top()
+  it('resets skipcol when scrolling cursor to top', function()
+    screen:try_resize(40, 12)
+    exec([[
+      set smoothscroll scrolloff=2
+      new | 11resize | wincmd j
+      call setline(1, ['line1', 'line2', 'line3'->repeat(20), 'line4'])
+      exe "norm G3\<C-E>k"
+    ]])
+    screen:expect([[
+                                              |
+      [No Name]                               |
+      line1                                   |
+      line2                                   |
+      ^line3line3line3line3line3line3line3line3|
+      line3line3line3line3line3line3line3line3|
+      line3line3line3line3                    |
+      line4                                   |
+      ~                                       |
+      ~                                       |
+      [No Name] [+]                           |
+                                              |
+    ]])
+  end)
+
+  -- oldtest: Test_smoothscroll_crash()
+  it('does not crash with small window and cpo+=n', function()
+    screen:try_resize(40, 12)
+    exec([[
+      20 new
+      vsp
+      put =repeat('aaaa', 20)
+      set nu fdc=1  smoothscroll cpo+=n
+      vert resize 0
+      exe "norm! 0\<c-e>"
+    ]])
+    feed('2<C-E>')
+    assert_alive()
+  end)
+
+  it("works with virt_lines above and below", function()
+    screen:try_resize(55, 7)
+    exec([=[
+      call setline(1, ['Line' .. (' with some text'->repeat(7))]->repeat(3))
+      set smoothscroll
+      let ns = nvim_create_namespace('')
+      call nvim_buf_set_extmark(0, ns, 0, 0, {'virt_lines':[[['virt_below1']]]})
+      call nvim_buf_set_extmark(0, ns, 1, 0, {'virt_lines':[[['virt_above1']]],'virt_lines_above':1})
+      call nvim_buf_set_extmark(0, ns, 1, 0, {'virt_lines':[[['virt_below2']]]})
+      call nvim_buf_set_extmark(0, ns, 2, 0, {'virt_lines':[[['virt_above2']]],'virt_lines_above':1})
+      norm ggL
+    ]=])
+    screen:expect([[
+      Line with some text with some text with some text with |
+      some text with some text with some text with some text |
+      virt_below1                                            |
+      virt_above1                                            |
+      ^Line with some text with some text with some text with |
+      some text with some text with some text with some text |
+                                                             |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+      <<<e text with some text with some text with some text |
+      virt_below1                                            |
+      virt_above1                                            |
+      ^Line with some text with some text with some text with |
+      some text with some text with some text with some text |
+      virt_below2                                            |
+                                                             |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+      virt_below1                                            |
+      virt_above1                                            |
+      ^Line with some text with some text with some text with |
+      some text with some text with some text with some text |
+      virt_below2                                            |
+      virt_above2                                            |
+                                                             |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+      virt_above1                                            |
+      ^Line with some text with some text with some text with |
+      some text with some text with some text with some text |
+      virt_below2                                            |
+      virt_above2                                            |
+      Line with some text with some text with some text wi@@@|
+                                                             |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+      ^Line with some text with some text with some text with |
+      some text with some text with some text with some text |
+      virt_below2                                            |
+      virt_above2                                            |
+      Line with some text with some text with some text with |
+      some text with some text with some text with some text |
+                                                             |
+    ]])
+    feed('<C-E>')
+    screen:expect([[
+      <<<e text with some text with some text with some tex^t |
+      virt_below2                                            |
+      virt_above2                                            |
+      Line with some text with some text with some text with |
+      some text with some text with some text with some text |
+      ~                                                      |
+                                                             |
+    ]])
+  end)
+
+  it('<<< marker shows with tabline, winbar and splits', function()
+    screen:try_resize(40, 12)
+    exec([[
+      call setline(1, ['Line' .. (' with some text'->repeat(7))]->repeat(7))
+      set smoothscroll scrolloff=0
+      norm sj
+    ]])
+    screen:expect([[
+      <<<e text with some text with some text |
+      with some text with some text           |
+      Line with some text with some text with |
+      some text with some text with some text |
+      with some text with some text           |
+      [No Name] [+]                           |
+      <<<e text with some text with some text |
+      ^with some text with some text           |
+      Line with some text with some text with |
+      some text with some text with some te@@@|
+      [No Name] [+]                           |
+                                              |
+    ]])
+    exec('set showtabline=2')
+    feed('<C-E>')
+    screen:expect([[
+       2+ [No Name]                           |
+      <<<e text with some text with some text |
+      with some text with some text           |
+      Line with some text with some text with |
+      some text with some text with some text |
+      with some text with some text           |
+      [No Name] [+]                           |
+      <<<e text with some text with some text |
+      ^with some text with some text           |
+      Line with some text with some text wi@@@|
+      [No Name] [+]                           |
+                                              |
+    ]])
+    exec('set winbar=winbar')
+    feed('<C-w>k<C-E>')
+    screen:expect([[
+       2+ [No Name]                           |
+      winbar                                  |
+      <<<e text with some text with some text |
+      ^with some text with some text           |
+      Line with some text with some text with |
+      some text with some text with some te@@@|
+      [No Name] [+]                           |
+      winbar                                  |
+      <<<e text with some text with some text |
+      with some text with some text           |
+      [No Name] [+]                           |
+                                              |
+    ]])
+  end)
+
+  it('works with very long line', function()
+    screen:set_default_attr_ids({
+      [1] = {foreground = Screen.colors.Brown},
+      [2] = {foreground = Screen.colors.Blue1, bold = true},
+    })
+    exec([[
+      edit test/functional/fixtures/bigfile_oneline.txt
+      setlocal smoothscroll number
+    ]])
+    screen:expect([[
+      {1:  1 }^0000;<control>;Cc;0;BN;;;;;N;NULL;;;|
+      {1:    }; 0001;<control>;Cc;0;BN;;;;;N;START|
+      {1:    } OF HEADING;;;; 0002;<control>;Cc;0;|
+      {1:    }BN;;;;;N;START OF TEXT;;;; 0003;<con|
+      {1:    }trol>;Cc;0;BN;;;;;N;END OF TEXT;;;; |
+      {1:    }0004;<control>;Cc;0;BN;;;;;N;END OF |
+      {1:    }TRANSMISSION;;;; 0005;<control>;Cc;0|
+      {1:    };BN;;;;;N;ENQUIRY;;;; 0006;<control>|
+      {1:    };Cc;0;BN;;;;;N;ACKNOWLEDGE;;;; 0007;|
+      {1:    }<control>;Cc;0;BN;;;;;N;BELL;;;; 000|
+      {1:    }8;<control>;Cc;0;BN;;;;;N;BACKSPACE;|
+                                              |
+    ]])
+    feed('j')
+    screen:expect([[
+      {2:<<<}{1: }CJK COMPATIBILITY IDEOGRAPH-2F91F;Lo|
+      {1:    };0;L;243AB;;;;N;;;;; 2F920;CJK COMPA|
+      {1:    }TIBILITY IDEOGRAPH-2F920;Lo;0;L;7228|
+      {1:    };;;;N;;;;; 2F921;CJK COMPATIBILITY I|
+      {1:    }DEOGRAPH-2F921;Lo;0;L;7235;;;;N;;;;;|
+      {1:    } 2F922;CJK COMPATIBILITY IDEOGRAPH-2|
+      {1:    }F922;Lo;0;L;7250;;;;N;;;;;          |
+      {1:  2 }^2F923;CJK COMPATIBILITY IDEOGRAPH-2F|
+      {1:    }923;Lo;0;L;24608;;;;N;;;;;          |
+      {1:  3 }2F924;CJK COMPATIBILITY IDEOGRAPH-2F|
+      {1:    }924;Lo;0;L;7280;;;;N;;;;;           |
+                                              |
+    ]])
+  end)
+end)