Problem: Window is updated with potentially invalid skipcol in recursive
window update path. I.e. cursor outside of visible range in
large line that does not fit.
Solution: Make sure it is valid (Luuk van Baal).
closes: #15605
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: some screen dump tests can be improved (after 9.1.0414)
Solution: Make sure screen state changes properly and is captured in the
screen dumps (Luuk van Baal)
closes: #14788
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Unable to leave long line with 'smoothscroll' and 'scrolloff'.
Corrupted screen near the end of a long line with 'scrolloff'.
(Ernie Rael, after 9.1.0280)
Solution: Only correct cursor in case scroll_cursor_bot() was not itself
called to make the cursor visible. Avoid adjusting for
'scrolloff' beyond the text line height (Luuk van Baal)
fixes: #14726closes: #14783
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Problems with cursor position when scrolling half a page.
Solution: Rework the cursor logic. (Luuk van Baal)
closes: #14455
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Logic to make sure cursor is in visible part of the screen after
scrolling the text with 'smoothscroll' is scattered, asymmetric
and contains bugs.
Solution: Adjust and create helper function for 'smoothscroll' cursor logic.
(Luuk van Baal)
closes: #14410
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: "zb" does not reveal filler lines at the start of a buffer.
Scrolled cursor position with 'smoothscroll' is unpredictable,
and may reset skipcol later if it is not visible (after v9.1.258)
Solution: Replace confusing for loop that reaches final control value too
early with while loop. Set "w_curswant" accordingly so cursor
will be placed in visible part of topline.
(Luuk van Baal)
closes: #14394
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Support for 'smoothscroll' in (half-)page scrolling
broke backward compatibility and can be made to work better.
(after v9.1.215)
Solution: Restore the previous cursor and end-of-buffer behavior for
half-page scrolling and improve 'smoothscroll' support.
(Luuk van Baal)
fixes: #14338closes: #14377
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Two unrelated things are tested by a single test.
Solution: Split it into two, restoring the old Test_brace_single_line().
Add missing cleanup to some tests.
(zeertzjq)
closes: #14323
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
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>
Problem: Page-wise scrolling with Ctrl-F/Ctrl-B implements
it's own logic to change the topline and cursor.
In doing so, skipcol is not handled properly for
'smoothscroll', and virtual lines.
Solution: Re-use the logic from Ctrl-E/Ctrl-Y while staying
backward compatible as much as possible.
closes: #14268
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: infinite loop in win_update with 'smoothscroll' set when
window width is equal to textoff, or signed integer overflow
if smaller.
Solution: don't revalidate wp->w_skipcol in that case, as no buffer text
is being shown. (Sean Dewar)
Don't instead reset w_skipcol; that would lose the scroll position
within the line, which may be undesirable if the window is made wider
later.
Also include changes from the splitmove PR #14042 that I (in my infinite
Git wisdom) forgot to commit. This includes a change to
Test_window_split_no_room to ensure it doesn't fail for some screen
sizes.
Move Test_smoothscroll_in_zero_width_window to test_scroll_opt.vim, as
that file feels more appropriate.
closes: #14068
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Wrong scrolling in Insert mode with 'smoothscroll' at the
bottom of the window.
Solution: Don't use set_topline() when 'smoothscroll' is set.
fixes: #13612closes: #13613
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: [security]: FPE in adjust_plines_for_skipcol
Solution: don't divide by zero, return zero
Prevent a floating point exception when calculating w_skipcol (which can
happen with a small window when the number option is set and cpo+=n).
Add a test to verify
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Skipcol is not reset when topline changed scrolling cursor to top
Solution: reset skipcol
closes: #13528closes: #13532
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Scrolling non-current window using mouse is inconsistent
depending on 'scrollbind'/'scrolloff' and different from GUI
vertical scrollbar when 'cursorbind' is set.
Solution: Don't move cursor in non-current windows for 'cursorbind' if
cursor in the current window didn't move.
closes: #13219closes: #13210
Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Problem: Display is wrong when 'smoothscroll' is set and scrolling multiple
lines.
Solution: Redraw with UPD_NOT_VALID when "skipcol" is or was set.
(closes#12490, closes#12468)
Problem: Stray character is visible if 'smoothscroll' marker is displayed
on top of a double-wide character.
Solution: When overwriting a double-width character with the 'smoothscroll'
marker clear the second half. (closes#12469)
Problem: With 'smoothscroll' cursor may move below botline.
Solution: Call redraw_later() if needed, Compute cursor row with adjusted
condition. (Luuk van Baal, closes#12415)
Problem: Display wrong when moving cursor to above the top line and
'smoothscroll' is set.
Solution: Call adjust_skipcol() in more places and make it work better.
(Luuk van Baal, closes#12395)
Problem: Position of marker for 'smoothscroll' not computed correctly.
Solution: Take 'list' and other options into account. (Luuk van Baal,
closes#12393)
Problem: Display errors when making topline shorter and 'smoothscroll' is
set.
Solution: Reset w_skipcol when the topline becomes shorter than its current
value. (Luuk van Baal, closes#12367)
Problem: 'smoothscroll' does not always work properly.
Solution: Do not reset w_skipcol after it was intentionally set. (Luuk van
Baal, closes#12360, closes#12199, closes#12323)
Problem: Cursor positioning and display problems with 'smoothscroll' and
using "zt", "zb" or "zz".
Solution: Adjust computations and conditions. (Yee Cheng Chin,
closes#11764)
Problem: With 'smoothscroll' cursor is one screen line too far down. (Ernie
Rael)
Solution: Add a test that currently has the wrong result so that a fix can
be made. (issue #11436)
Problem: Cursor position invalid when scrolling with 'smoothscroll' set.
(Ernie Rael)
Solution: Add w_valid_skipcol and clear flags when it changes. Adjust
w_skipcol after moving the cursor.
Problem: With 'smoothscroll' and 'scrolloff' non-zero the cursor position
is not properly adjusted in a long line.
Solution: Move the cursor further up or down in the line.
Problem: Cursor line only partly shows with 'smoothscroll' and 'scrolloff'
zero.
Solution: Do not use 'smoothscroll' when adjusting the bottom of the window.
(closes#11269)
