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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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8
runtime/doc/options.txt
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@ -1,4 +1,4 @@
*options.txt* For Vim version 9.1. Last change: 2024 Mar 26
*options.txt* For Vim version 9.1. Last change: 2024 Mar 28
VIM REFERENCE MANUAL by Bram Moolenaar
@ -7503,7 +7503,7 @@ A jump table for the options with a short description can be found at |Q_op|.
You may also want to add "lastline" to the 'display' option to show as
much of the last line as possible.
NOTE: only partly implemented, currently works with CTRL-E, CTRL-Y,
CTRL-B, CTRL-F and scrolling with the mouse.
CTRL-D, CTRL-U, CTRL-F, CTRL-B and scrolling with the mouse.
*'softtabstop'* *'sts'*
'softtabstop' 'sts' number (default 0)
@ -9469,8 +9469,8 @@ A jump table for the options with a short description can be found at |Q_op|.
will scroll 'window' minus two lines, with a minimum of one.
When 'window' is equal to 'lines' minus one CTRL-F and CTRL-B scroll
in a much smarter way, taking care of wrapping lines.
When resizing the Vim window, the value is smaller than 1 or more than
or equal to 'lines' it will be set to 'lines' minus 1.
When resizing the Vim window, and the value is smaller than 1 or more
than or equal to 'lines' it will be set to 'lines' minus 1.
Note: Do not confuse this with the height of the Vim window, use
'lines' for that.