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feat: add 'mousescroll' option (#12355)

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Add 'mousescroll' option to control how many lines to scroll by when a
mouse wheel keycode is received. The mousescroll option controls both
horizontal and vertical scrolling. The option is a string in the format:

    set mousescroll=direction:count,direction:count

Where direction is either "ver" or "hor", and count is a non negative
integer. If a direction is omitted, a default value is used. The default
values remain unchanged, that is 3 for vertical scrolling, and 6 for
horizontal scrolling. As such, the mousescroll default is "ver:3,hor:6".

Add mousescroll documentation
 - Add option documentation in options.txt
 - Add brief summary in quickref.txt

Update :help scroll-mouse-wheel
 - Mention mousescroll option as a means of controlling scrolling.
 - Remove obsolete suggestion to map scroll wheel keys to <C-U> to
   scroll by a single line -- users should prefer the mousescroll option.
 - Add some information about the consequences of remapping scroll wheel
   keys (they lose their magic ability to affect inactive windows).

Update :help vim-differences
 - Add brief mousescroll summary under Options

Add mousescroll tests
 - Test option validation
 - Test default mousescroll value and behavior
 - Test fallback to default values
 - Test mouse vertical and horizontal scrolling in normal mode
 - Test mouse vertical and horizontal scrolling in insert mode
This commit is contained in:
Jay
2022-07-06 12:34:24 +01:00
committed by GitHub
parent 9ced054134
commit 93c8fe77cb
11 changed files with 271 additions and 15 deletions
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8
src/nvim/edit.c
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@@ -8557,14 +8557,12 @@ static void ins_mousescroll(int dir)
}
// Don't scroll the window in which completion is being done.
if (!pum_visible()
|| curwin != old_curwin) {
if (!pum_visible() || curwin != old_curwin) {
if (dir == MSCR_DOWN || dir == MSCR_UP) {
if (mod_mask & (MOD_MASK_SHIFT | MOD_MASK_CTRL)) {
scroll_redraw(dir,
(curwin->w_botline - curwin->w_topline));
scroll_redraw(dir, (long)(curwin->w_botline - curwin->w_topline));
} else {
scroll_redraw(dir, 3L);
scroll_redraw(dir, p_mousescroll_vert);
}
} else {
mouse_scroll_horiz(dir);