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vim-patch:9.0.0908: with 'smoothscroll' cursor may end up in wrong position

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Problem:    With 'smoothscroll' cursor may end up in wrong position.
Solution:   Correct the computation of screen lines. (Yee Cheng Chin,
            closes vim/vim#11502)

361895d2a1

Co-authored-by: Yee Cheng Chin <ychin.git@gmail.com>
This commit is contained in:
Luuk van Baal
2023-04-27 19:40:00 +02:00
parent 26a9f0e94e
commit 46646a9bb8
3 changed files with 96 additions and 8 deletions
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26
test/old/testdir/test_scroll_opt.vim
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@@ -263,7 +263,7 @@ func Test_smoothscroll_wrap_long_line()
let lines =<< trim END
vim9script
setline(1, ['one', 'two', 'Line' .. (' with lots of text'->repeat(30))])
setline(1, ['one', 'two', 'Line' .. (' with lots of text'->repeat(30)) .. ' end', 'four'])
set smoothscroll scrolloff=0
normal 3G10|zt
END
@@ -304,6 +304,30 @@ func Test_smoothscroll_wrap_long_line()
call term_sendkeys(buf, "gj")
call term_sendkeys(buf, "\<C-Y>")
call VerifyScreenDump(buf, 'Test_smooth_long_9', {})
" '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.
call term_sendkeys(buf, ":set scrolloff=0\<CR>")
call term_sendkeys(buf, "0j")
call VerifyScreenDump(buf, 'Test_smooth_long_10', {})
" 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.
call term_sendkeys(buf, ":call setline(1, ['one', 'two', 'Line' .. (' with lots of text'->repeat(10)) .. ' end', 'four'])\<CR>")
call term_sendkeys(buf, "3Gzt")
call term_sendkeys(buf, "j")
call VerifyScreenDump(buf, 'Test_smooth_long_11', {})
" 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.
call term_sendkeys(buf, "3Gzt")
call term_sendkeys(buf, "\<C-E>j")
call VerifyScreenDump(buf, 'Test_smooth_long_12', {})
call StopVimInTerminal(buf)
endfunc