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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
255 lines
10 KiB
Plaintext
255 lines
10 KiB
Plaintext
*scroll.txt* Nvim
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VIM REFERENCE MANUAL by Bram Moolenaar
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Scrolling *scrolling*
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These commands move the contents of the window. If the cursor position is
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moved off of the window, the cursor is moved onto the window (with
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'scrolloff' screen lines around it). A page is the number of lines in the
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window minus two. The mnemonics for these commands may be a bit confusing.
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Remember that the commands refer to moving the window (the part of the buffer
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that you see) upwards or downwards in the buffer. When the window moves
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upwards in the buffer, the text in the window moves downwards on your screen.
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See section |03.7| of the user manual for an introduction.
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Type |gO| to see the table of contents.
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==============================================================================
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1. Scrolling downwards *scroll-down*
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The following commands move the edit window (the part of the buffer that you
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see) downwards (this means that more lines downwards in the text buffer can be
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seen):
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*CTRL-E*
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CTRL-E Scroll window [count] lines downwards in the buffer.
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The text moves upwards on the screen.
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Mnemonic: Extra lines.
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*CTRL-D*
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CTRL-D Scroll window Downwards in the buffer. The number of
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lines comes from the 'scroll' option (default: half a
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screen). If [count] given, first set 'scroll' option
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to [count]. The cursor is moved the same number of
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lines down in the file (if possible; when lines wrap
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and when hitting the end of the file there may be a
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difference). When the cursor is on the last line of
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the buffer nothing happens and a beep is produced.
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See also 'startofline' option.
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{difference from vi: Vim scrolls 'scroll' screen
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lines, instead of file lines; makes a difference when
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lines wrap}
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<S-Down> or *<S-Down>* *<kPageDown>*
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<PageDown> or *<PageDown>* *CTRL-F*
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CTRL-F Scroll window [count] pages Forwards (downwards) in
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the buffer. See also 'startofline' option.
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When there is only one window the 'window' option
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might be used.
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*z+*
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z+ Without [count]: Redraw with the line just below the
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window at the top of the window. Put the cursor in
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that line, at the first non-blank in the line.
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With [count]: just like "z<CR>".
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==============================================================================
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2. Scrolling upwards *scroll-up*
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The following commands move the edit window (the part of the buffer that you
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see) upwards (this means that more lines upwards in the text buffer can be
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seen):
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*CTRL-Y*
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CTRL-Y Scroll window [count] lines upwards in the buffer.
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The text moves downwards on the screen.
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Note: When using the MS-Windows key bindings CTRL-Y is
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remapped to redo.
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*CTRL-U*
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CTRL-U Scroll window Upwards in the buffer. The number of
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lines comes from the 'scroll' option (default: half a
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screen). If [count] given, first set the 'scroll'
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option to [count]. The cursor is moved the same
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number of lines up in the file (if possible; when
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lines wrap and when hitting the end of the file there
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may be a difference). When the cursor is on the first
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line of the buffer nothing happens and a beep is
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produced. See also 'startofline' option.
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<S-Up> or *<S-Up>* *<kPageUp>*
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<PageUp> or *<PageUp>* *CTRL-B*
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CTRL-B Scroll window [count] pages Backwards (upwards) in the
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buffer. See also 'startofline' option.
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When there is only one window the 'window' option
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might be used.
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*z^*
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z^ Without [count]: Redraw with the line just above the
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window at the bottom of the window. Put the cursor in
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that line, at the first non-blank in the line.
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With [count]: First scroll the text to put the [count]
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line at the bottom of the window, then redraw with the
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line which is now at the top of the window at the
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bottom of the window. Put the cursor in that line, at
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the first non-blank in the line.
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==============================================================================
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3. Scrolling relative to cursor *scroll-cursor*
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The following commands reposition the edit window (the part of the buffer that
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you see) while keeping the cursor on the same line. Note that the 'scrolloff'
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option may cause context lines to show above and below the cursor.
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*z<CR>*
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z<CR> Redraw, line [count] at top of window (default
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cursor line). Put cursor at first non-blank in the
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line.
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*zt*
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zt Like "z<CR>", but leave the cursor in the same
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column.
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*zN<CR>*
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z{height}<CR> Redraw, make window {height} lines tall. This is
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useful to make the number of lines small when screen
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updating is very slow. Cannot make the height more
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than the physical screen height.
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*z.*
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z. Redraw, line [count] at center of window (default
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cursor line). Put cursor at first non-blank in the
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line.
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*zz*
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zz Like "z.", but leave the cursor in the same column.
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Careful: If caps-lock is on, this command becomes
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"ZZ": write buffer and exit!
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*z-*
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z- Redraw, line [count] at bottom of window (default
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cursor line). Put cursor at first non-blank in the
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line.
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*zb*
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zb Like "z-", but leave the cursor in the same column.
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==============================================================================
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4. Scrolling horizontally *scroll-horizontal*
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For the following four commands the cursor follows the screen. If the
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character that the cursor is on is moved off the screen, the cursor is moved
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to the closest character that is on the screen. The value of 'sidescroll' is
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not used.
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z<Right> or *zl* *z<Right>*
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zl Move the view on the text [count] characters to the
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right, thus scroll the text [count] characters to the
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left. This only works when 'wrap' is off.
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z<Left> or *zh* *z<Left>*
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zh Move the view on the text [count] characters to the
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left, thus scroll the text [count] characters to the
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right. This only works when 'wrap' is off.
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*zL*
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zL Move the view on the text half a screenwidth to the
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right, thus scroll the text half a screenwidth to the
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left. This only works when 'wrap' is off.
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*zH*
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zH Move the view on the text half a screenwidth to the
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left, thus scroll the text half a screenwidth to the
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right. This only works when 'wrap' is off.
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For the following two commands the cursor is not moved in the text, only the
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text scrolls on the screen.
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*zs*
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zs Scroll the text horizontally to position the cursor
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at the start (left side) of the screen. This only
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works when 'wrap' is off.
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*ze*
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ze Scroll the text horizontally to position the cursor
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at the end (right side) of the screen. This only
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works when 'wrap' is off.
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==============================================================================
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5. Scrolling synchronously *scroll-binding*
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Occasionally, it is desirable to bind two or more windows together such that
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when one window is scrolled, the other windows are also scrolled. In Vim,
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windows can be given this behavior by setting the (window-specific)
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'scrollbind' option. When a window that has 'scrollbind' set is scrolled, all
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other 'scrollbind' windows are scrolled the same amount, if possible. The
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behavior of 'scrollbind' can be modified by the 'scrollopt' option.
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When using the scrollbars, the binding only happens when scrolling the window
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with focus (where the cursor is). You can use this to avoid scroll-binding
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for a moment without resetting options.
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When a window also has the 'diff' option set, the scroll-binding uses the
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differences between the two buffers to synchronize the position precisely.
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Otherwise the following method is used.
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*scrollbind-relative*
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Each 'scrollbind' window keeps track of its "relative offset," which can be
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thought of as the difference between the current window's vertical scroll
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position and the other window's vertical scroll position. When one of the
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'scrollbind' windows is asked to vertically scroll past the beginning or end
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limit of its text, the window no longer scrolls, but remembers how far past
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the limit it wishes to be. The window keeps this information so that it can
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maintain the same relative offset, regardless of its being asked to scroll
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past its buffer's limits.
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However, if a 'scrollbind' window that has a relative offset that is past its
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buffer's limits is given the cursor focus, the other 'scrollbind' windows must
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jump to a location where the current window's relative offset is valid. This
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behavior can be changed by clearing the "jump" flag from the 'scrollopt'
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option.
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*syncbind* *:syncbind* *:sync*
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:syncbind Force all 'scrollbind' windows to have the same
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relative offset. I.e., when any of the 'scrollbind'
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windows is scrolled to the top of its buffer, all of
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the 'scrollbind' windows will also be at the top of
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their buffers.
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*scrollbind-quickadj*
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The 'scrollbind' flag is meaningful when using keyboard commands to vertically
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scroll a window, and also meaningful when using the vertical scrollbar of the
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window which has the cursor focus. However, when using the vertical scrollbar
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of a window which doesn't have the cursor focus, 'scrollbind' is ignored.
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This allows quick adjustment of the relative offset of 'scrollbind' windows.
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==============================================================================
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6. Scrolling with a mouse wheel *scroll-mouse-wheel*
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When your mouse has a scroll wheel, it should work with Nvim in the GUI and
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any terminal that has mouse support. By default only vertical scroll wheels
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are supported, but some GUIs also support horizontal scroll wheels.
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Note that horizontal scrolling only works if 'nowrap' is set. Also, unless
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the "h" flag in 'guioptions' is set, the cursor moves to the longest visible
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line if the cursor line is about to be scrolled off the screen (similarly to
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how the horizontal scrollbar works).
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You can control the number of lines / columns to scroll by using the
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'mousescroll' option. You can also modify the default behavior by mapping
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the keys. For example, to scroll a page at a time in normal mode: >
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:map <ScrollWheelUp> <C-B>
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:map <ScrollWheelDown> <C-F>
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Scroll keys can also be combined with modifiers such as Shift, Ctrl, and Alt.
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When scrolling with a mouse, the window currently under the cursor is
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scrolled. This allows you to scroll inactive windows. Note that when scroll
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keys are remapped to keyboard keys, the active window is affected regardless
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of the current cursor position.
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vim:tw=78:ts=8:noet:ft=help:norl:
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