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patch 9.1.0215: Half-page scrolling does not support smooth-scrolling

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Problem:  Page-wise scrolling with Ctrl-D/Ctrl-U implements
          it's own logic to change the topline and cursor.
          More logic than necessary for scrolling with Ctrl-F/Ctrl-B
          was removed in patch 9.1.0211.
Solution: Re-use the logic from Ctrl-E/Ctrl-Y/Ctrl-F/Ctrl-B while
          staying backward compatible as much as possible.
          Restore some of the logic that determined how many lines will
          be scrolled (Luuk van Baal)

closes: #14316

Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Luuk van Baal
2024-03-28 10:07:29 +01:00
committed by Christian Brabandt
parent 982e191b38
commit 5a2e3ec9ac
12 changed files with 166 additions and 242 deletions
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29
src/testdir/test_scroll_opt.vim
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@@ -1005,18 +1005,39 @@ func Test_smoothscroll_page()
call setline(1, 'abcde '->repeat(150))
exe "norm! \<C-F>"
call assert_equal(320, winsaveview().skipcol)
call assert_equal(400, winsaveview().skipcol)
exe "norm! \<C-F>"
call assert_equal(640, winsaveview().skipcol)
call assert_equal(800, winsaveview().skipcol)
exe "norm! \<C-F>"
call assert_equal(880, winsaveview().skipcol)
exe "norm! \<C-B>"
call assert_equal(560, winsaveview().skipcol)
call assert_equal(480, winsaveview().skipcol)
exe "norm! \<C-B>"
call assert_equal(240, winsaveview().skipcol)
call assert_equal(80, winsaveview().skipcol)
exe "norm! \<C-B>"
call assert_equal(0, winsaveview().skipcol)
exe "norm! \<C-D>"
call assert_equal(200, winsaveview().skipcol)
exe "norm! \<C-D>"
call assert_equal(400, winsaveview().skipcol)
exe "norm! \<C-D>"
call assert_equal(600, winsaveview().skipcol)
exe "norm! \<C-D>"
call assert_equal(800, winsaveview().skipcol)
exe "norm! \<C-D>"
call assert_equal(880, winsaveview().skipcol)
exe "norm! \<C-U>"
call assert_equal(680, winsaveview().skipcol)
exe "norm! \<C-U>"
call assert_equal(480, winsaveview().skipcol)
exe "norm! \<C-U>"
call assert_equal(280, winsaveview().skipcol)
exe "norm! \<C-U>"
call assert_equal(80, winsaveview().skipcol)
exe "norm! \<C-U>"
call assert_equal(0, winsaveview().skipcol)
set smoothscroll&
endfunc