vi.opt.roff

早期freebsd实现

.\" Copyright (c) 1994
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" %sccs.include.redist.roff%
.\"
.\"	%W% (Berkeley) %G%
.\"
This section describes the commands available in the command mode
of the
.Nm \&vi
editor.
#ifdef REFERENCE
.Pp
A
.Dq word
in
.Nm \&vi
is a sequence of letters, digits and underscores, delimited by other
characters or the beginning or ending of a line.
Many vi commands operate on this kind of
.Dq word ,
while some operate on
.Dq words
which are delimited by white space characters and the beginning and
end of line, only.
.Pp
.Nm \&Vi
keeps track of the currently
.Dq most attractive
cursor position.
Each command below, that can change the current cursor position,
specifies if the cursor is set to a specific location in the line,
or if it is moved to the
.Dq most attractive
cursor position.
The latter means that the cursor is moved to the cursor position that
is vertically as close as possible to the last cursor position.
If the current line is shorter than than the cursor position
.Nm \&vi
would select, the cursor is positioned on the last character in the line.
In all cases, if the line is empty, the cursor is positioned on the first
column of the line.
#endif
.Pp
In each entry below, the tag line is a usage statement for the command
character.
A leading word count, in square brackets, indicates that the command
takes an optional
.Dq Li count ,
causing it to repeat the command's effect
.Li count
times.
.Bl -tag -width "XXXX" -compact
.It Li "[count] ^A"
Search forward for the
.Li count
occurrence of the
.Sy word
upon which the cursor is positioned.
The
.Dq Li \&^A
command may be used as a motion argument.
#ifdef REFERENCE
The cursor is positioned at the beginning of the
.Sy word
if it is found.
Affected by the
.Sy extended
and
.Sy wrapscan
options.
#endif
.It Li "^B [count]"
Scroll up
.Li count
screens.
#ifdef REFERENCE
The cursor is positioned at the first non-blank character of the new line.
#endif
.It Li "^C"
Interrupt an operation (e.g. text input, read, write, search).
#ifdef REFERENCE
If
.Li \&^C
is used to interrupt inserting text into the file, it is as if
the <escape> character was used; all text input up to the
interruption is resolved into the file.
If it is used to interrupt entering an
.Nm \&ex
command, the command is aborted, the cursor returns to its previous
position, and
.Nm \&vi
remains in command mode.
.It Li "^D [count]"
Scroll down the number of lines specified by the
.Sy scroll
option.
The cursor is positioned at the first non-blank character of the new line.
#ifdef REFERENCE
If
.Li count
is specified,
.Li \&^D
scrolls down that many lines, and the value of the
.Sy scroll
option is set to
.Li count .
Affected by the
.Sy scroll
option.
#endif
.It Li "^E [count]"
Scroll the screen down
.Li count
lines.
#ifdef REFERENCE
The
.Li \&^E
command differs from the other scrolling commands (with the exception of
.Li \&^Y )
in that it moves the screen, without moving the cursor, i.e. the cursor
follows the line.
If the line the cursor is on scrolls off the bottom of the screen,
the cursor is positioned at the most attractive column.
#endif
.It Li "^F [count]"
Scroll down
.Li count
screens.
#ifdef REFERENCE
The cursor is positioned at the first non-blank character of the new line.
#endif
.It Li "^G"
Display the file name and status.
#ifdef REFERENCE
Affected by the
.Sy showdirty
option.
#endif
.It Li "^H [count, motion]"
.de HH
Move the cursor left
.Li count
characters.
#ifdef REFERENCE
The beginning of the line is a sink for the movement, however,
it is an error to move left from the first character of the line.
#endif
..
.It Li "^J [count, motion]"
.de JJ
Move the cursor down
.Li count
physical lines.
#ifdef REFERENCE
The cursor is positioned at the most attractive column.
#endif
..
.It Li "^L"
Redraw the screen.
.It Li "^M"
.de MM
Move the cursor down
.Li count
physical lines.
#ifdef REFERENCE
The cursor is positioned at the first non-blank character of the new line.
#endif
..
.It Li "^N"
.JJ
.It Li "^P [count, motion]"
.de PP
Move the cursor up
.Li count
lines.
#ifdef REFERENCE
The cursor is positioned at the most attractive column.
.endif
..
.It Li "^R"
Redraw the screen.
.It Li "^U [count]"
Scroll up the number of lines specified by the
.Sy scroll
option.
The cursor is positioned at the first non-blank character of the new line.
#ifdef REFERENCE
If
.Li count
is specified,
.Li \&^U
scrolls up that many lines, and the value of the
.Sy scroll
option is set to
.Li count .
Affected by the
.Sy scroll
option.
#endif
.It Li "^Y"
Scroll the screen up
.Li count
lines.
#ifdef REFERENCE
The
.Li \&^Y
command differs from the other scrolling commands (with the exception of
.Li \&^E )
in that it moves the screen, without moving the cursor, i.e. the cursor
follows the line.
If the line the cursor is on scrolls off the top of the screen,
the cursor is positioned at the most attractive column.
#endif
.It Li "^Z"
Suspend the
.Nm \&vi
session.
.It Li "^["
This is the <escape> character as well as
.Dq Li \&^[ .
#ifdef MANUAL
Execute
.Nm \&ex
commands and cancel partial commands.
#endif
#ifdef REFERENCE
If an
.Nm \&ex
command is being entered, the <escape> character causes the command
to be executed.
If a partial command has been entered, e.g.
.Dq Li "[0-9]*" ,
or
.Dq Li "[0-9]*[!<>cdy]" ,
the command is cancelled.
Otherwise, it is considered and error.
#endif
.It Li "^]"
.It Li "^^"
.It Li "' ' [count, motion] "
.de LL
Move the cursor right
.Li count
characters.
#ifdef REFERENCE
The end of the line is a sink for the movement, however,
it is an error to move right from the last character of the line.
It is not, however, an error to use the the <space> or
.Dq Li l
commands as motion commands at the end of the line.
#endif
..
.It Li "! [count]"
.It Li "#"
.It Li "$"
.It Li "%"
.It Li "&"
.It Li "'"
.It Li "("
.It Li ")"
.It Li "+"
.MM
.It Li ","
.It Li "-"
.It Li "."
.It Li "/"
.It Li "0"
.It Li ":"
.It Li ";"
.It Li "<"
.It Li ">"
.It Li "?"
.It Li "@"
.It Li "A"
.It Li "B"
.It Li "C"
.It Li "D"
.It Li "E"
.It Li "F"
.It Li "G"
.It Li "H"
.It Li "I"
.It Li "J"
.It Li "L"
.It Li "M"
.It Li "N"
.It Li "O"
.It Li "P"
.It Li "Q"
.It Li "R"
.It Li "S"
.It Li "T"
.It Li "U"
.It Li "W"
.It Li "X"
.It Li "Y"
.It Li "ZZ"
.It Li "[["
.It Li "]]"
.It Li "^"
.It Li "_"
.It Li "`<mark>"
.It Li "a"
.It Li "b"
.It Li "c"
.It Li "d"
.It Li "e"
.It Li "f"
.It Li "h"
.HH
.It Li "i"
.It Li "j"
.JJ
.It Li "k"
.PP
.It Li "l"
.LL
.It Li "m"
.It Li "n"
.It Li "o"
.It Li "p"
.It Li "r"
.It Li "s"
.It Li "t"
.It Li "u"
.It Li "w"
.It Li "x"
.It Li "y"
.It Li "z"
.It Li "{"
.It Li "|"
.It Li "}"
.It Li "~"
.El
This section describes the commands available in the text input mode
of the
.Nm \&vi
editor.
.Bl -tag -width "XXXX" -compact
.It Li "^T"
Move the cursor forwards the number of columns specified by the option
.Sy shiftwidth .
#ifdef REFERENCE
First, <tab> characters are inserted, and then <spaces> if necessary.
Historically,
.Nm \&vi
did not permit the
.Li \&^T
command to be used unless the cursor was at the first column of a new
line or it was preceded only by
.Sy autoindent
characters.
.Nm \&Nvi
permits it to be used at any time during insert mode.
#endif
.It Li "^["
This is the <escape> character as well as
.Dq Li \&^[ .
.It Li "^V"
.It Li "^W"
.It Li "^X"
.El