The PC-SIG Library 10/The PC-Sig Library - Shareware for the IBM PC and Compatibles (PC-SIG)(Tenth Edition Disks 1-2804)(1991).iso/PC_SIGCD/14/3/DISK1430.ZIP/DOC/JOVE.DXZ/JOVE

Text File | 1988-05-19 | 205KB | 5,017 lines

                   JOVE Manual for UNIX Users

                         _J_o_n_a_t_h_a_n _P_a_y_n_e
      (_r_e_v_i_s_e_d _f_o_r _4._3_B_S_D _b_y _D_o_u_g _K_i_n_g_s_t_o_n _a_n_d _M_a_r_k _S_e_i_d_e_n)


_1.  _I_n_t_r_o_d_u_c_t_i_o_n

JOVE* is an advanced,  self-documenting,  customizable  real-time
display editor.  It (and this tutorial introduction) are based on
the original EMACS editor and user manual written  at  M.I.T.  by
Richard Stallman+.

JOVE is considered a _d_i_s_p_l_a_y editor  because  normally  the  text
being  edited  is  visible on the screen and is updated automati-
cally as you type your commands.

It's considered a _r_e_a_l-_t_i_m_e editor because the display is updated
very  frequently, usually after each character or pair of charac-
ters you type.  This minimizes the amount of information you must
keep in your head as you edit.

JOVE is _a_d_v_a_n_c_e_d because it provides facilities  that  go  beyond
simple  insertion and deletion: filling of text; automatic inden-
tations of programs; view more than one file at once; and dealing
in  terms  of characters, words, lines, sentences and paragraphs.
It is much easier to type one command meaning "go to the  end  of
the  paragraph"  than to find the desired spot with repetition of
simpler commands.

_S_e_l_f-_d_o_c_u_m_e_n_t_i_n_g means that at almost any  time  you  can  easily
find  out  what  a command does, or to find all the commands that
pertain to a topic.

_C_u_s_t_o_m_i_z_a_b_l_e means that you can change  the  definition  of  JOVE
commands in little ways.  For example, you can rearrange the com-
mand set; if you prefer to use arrow keys for the four basic cur-
sor motion commands (up, down, left and right), you can.  Another
sort of customization is writing new commands by combining  built
in commands.

_2.  _T_h_e _O_r_g_a_n_i_z_a_t_i_o_n _o_f _t_h_e _S_c_r_e_e_n

JOVE divides the screen up into several sections.  The biggest of
these  sections is used to display the text you are editing.  The
terminal's cursor shows the position of _p_o_i_n_t,  the  location  at
_________________________
*JOVE stands for Jonathan's Own Version of Emacs.
+Although  JOVE  is  meant to be compatible with EMACS,
and indeed many of the basic commands are very similar,
there  are  some major differences between the two edi-
tors, and you should not rely on their behaving identi-
cally.




                           May 2, 1988





USD:17-2                               JOVE Manual for UNIX Users


which editing takes place.  While the cursor appears to point  _a_t
a character, point should be thought of as between characters; it
points _b_e_f_o_r_e the character that the cursor appears  on  top  of.
Terminals have only one cursor, and when output is in progress it
must appear where the typing is being done.   This  doesn't  mean
that  point is moving; it is only that JOVE has no way of showing
you the location of point except when the terminal is idle.

The lines of the screen are usually available for displaying text
but  sometimes  are  pre-empted  by typeout from certain commands
(such as a listing of all the  editor  commands).   Most  of  the
time, output from commands like these is only desired for a short
period of time, usually just long enough to glance at  it.   When
you  have  finished  looking at the output, you can type Space to
make your text reappear.  (Usually a Space that you type  inserts
itself,  but when there is typeout on the screen, it does nothing
but get rid of that).  Any other command executes normally, _a_f_t_e_r
redrawing your text.

_2._1.  _T_h_e _M_e_s_s_a_g_e _L_i_n_e

The bottom line on  the  screen,  called  the  _m_e_s_s_a_g_e  _l_i_n_e,  is
reserved  for  printing messages and for accepting input from the
user, such as filenames or search strings.  When JOVE prompts for
input,  the  cursor  will  temporarily appear on the bottom line,
waiting for you to type a string.  When you have finished  typing
your  input,  you  can  type a Return to send it to JOVE.  If you
change your mind about running the command that  is  waiting  for
input, you can type Control-G to abort, and you can continue with
your editing.

When JOVE is prompting for a  filename,  all  the  usual  editing
facilities  can  be used to fix typos and such; in addition, JOVE
has the following extra functions:

^N   Insert the next filename from the argument list.

^P   Insert the previous filename from the argument list.

^R   Insert the full pathname of the file in the current buffer.

Sometimes you will see --more-- on the message line.   This  hap-
pens  when  typeout  from  a  command  is  too long to fit in the
screen.  It means that if you type a Space the next screenful  of
typeout  will be printed.  If you are not interested, typing any-
thing but a Space will cause the rest of the output  to  be  dis-
carded.   Typing  C-G  will  discard the output and print _A_b_o_r_t_e_d
where the --more-- was.  Typing any other  command  will  discard
the rest of the output and also execute the command.

The message line and the list of filenames from the shell command
that  invoked  JOVE  are  kept in a special buffer called _M_i_n_i_b_u_f
that can be edited like any other buffer.




                           May 2, 1988





JOVE Manual for UNIX Users                               USD:17-3


_2._2.  _T_h_e _M_o_d_e _L_i_n_e

At the bottom of the screen, but above the message line,  is  the
_m_o_d_e _l_i_n_e.  The mode line format looks like this:

        JOVE (major minor)   Buffer: bufr  "file" *

_m_a_j_o_r is the name of the current _m_a_j_o_r _m_o_d_e.  At any  time,  JOVE
can  be  in  only  one major mode at a time.  Currently there are
only four major modes: _F_u_n_d_a_m_e_n_t_a_l, _T_e_x_t, _L_i_s_p and _C.

_m_i_n_o_r is a list of the minor modes that are  turned  on.   Abbrev
means that _W_o_r_d _A_b_b_r_e_v mode is on; AI means that _A_u_t_o _I_n_d_e_n_t mode
is on; Fill means that _A_u_t_o _F_i_l_l mode is  on;  OvrWt  means  that
_O_v_e_r  _W_r_i_t_e mode is on.  Def means that you are in the process of
defining a keyboard macro.  This is not really a mode,  but  it's
useful  to be reminded about it.  The meanings of these modes are
described later in this document.

_b_u_f_r is the name of the currently selected _b_u_f_f_e_r.   Each  buffer
has  its own name and holds a file being edited; this is how JOVE
can hold several files at once.  But at any given  time  you  are
editing  only one of them, the _s_e_l_e_c_t_e_d buffer.  When we speak of
what some command does to "the buffer", we are talking about  the
currently  selected  buffer.   Multiple  buffers makes it easy to
switch around between several files, and then it is  very  useful
that  the  mode  line  tells you which one you are editing at any
time.  (You will see later that it  is  possible  to  divide  the
screen  into  multiple  _w_i_n_d_o_w_s, each showing a different buffer.
If you do this, there is a mode line beneath each window.)

_f_i_l_e is the name of the file that you are editing.  This  is  the
default filename for commands that expect a filename as input.

The asterisk at the end of the mode line  means  that  there  are
changes  in  the buffer that have not been saved in the file.  If
the file has not been changed since it  was  read  in  or  saved,
there is no asterisk.

_3.  _C_o_m_m_a_n_d _I_n_p_u_t _C_o_n_v_e_n_t_i_o_n_s


_3._1.  _N_o_t_a_t_i_o_n_a_l _C_o_n_v_e_n_t_i_o_n_s _f_o_r _A_S_C_I_I _C_h_a_r_a_c_t_e_r_s

In this manual, "Control" characters (that  is,  characters  that
are  typed  with  the  Control key and some other key at the same
time) are represented by  "C-"  followed  by  another  character.
Thus,  C-A is the character you get when you type A with the Con-
trol key (sometimes labeled CTRL) down.  Most control  characters
when present in the JOVE buffer are displayed with a caret; thus,
^A for C-A.  Rubout (or DEL) is displayed as ^?, escape as ^[.






                           May 2, 1988





USD:17-4                               JOVE Manual for UNIX Users


_3._2.  _C_o_m_m_a_n_d _a_n_d _F_i_l_e_n_a_m_e _C_o_m_p_l_e_t_i_o_n

When you are typing the name of a JOVE  command,  you  need  type
only  enough  letters to make the name unambiguous.  At any point
in the course of typing the name, you can type question mark  (?)
to  see  a  list  of  all the commands whose names begin with the
characters you've already typed; you can type Space to have  JOVE
supply  as  many  characters as it can; or you can type Return to
complete the command if there is only one possibility.  For exam-
ple, if you have typed the letters "_a_u" and you then type a ques-
tion mark, you will see the list

           auto-execute-command
           auto-execute-macro
           auto-fill-mode
           auto-indent-mode

If you type a Return at this point, JOVE will complain by ringing
the  bell,  because the letters you've typed do not unambiguously
specify a single command.  But if you type Space, JOVE will  sup-
ply  the  characters  "_t_o-"  because all commands that begin "_a_u"
also begin "_a_u_t_o-".  You could then type the letter "_f"  followed
by  either  Space  or  Return, and JOVE would complete the entire
command.

Whenever JOVE is prompting you for a filename, say in  the  _f_i_n_d-
_f_i_l_e  command, you also need only type enough of the name to make
it unambiguous with respect to files that already exist.  In this
case,  question  mark  and  Space work just as they do in command
completion, but Return always accepts the  name  just  as  you've
typed it, because you might want to create a new file with a name
similar to that of an existing file.  The variable  _b_a_d-_f_i_l_e_n_a_m_e-
_e_x_t_e_n_s_i_o_n_s contains a list of words separated by spaces which are
to be considered bad filename extensions,  and  so  will  not  be
counted  in  filename  completion.  The default is ".o" so if you
have jove.c and jove.o in the same directory, the  filename  com-
pletion  will not complain of an ambiguity because it will ignore
jove.o.


_4.  _C_o_m_m_a_n_d_s _a_n_d _V_a_r_i_a_b_l_e_s

JOVE is composed of _c_o_m_m_a_n_d_s which have long names such as  _n_e_x_t-
_l_i_n_e.   Then  _k_e_y_s  such as C-N are connected to commands through
the _c_o_m_m_a_n_d _d_i_s_p_a_t_c_h _t_a_b_l_e.  When we say that C-N moves the  cur-
sor  down  a  line,  we  are glossing over a distinction which is
unimportant for ordinary use, but essential for simple customiza-
tion:  it is the command _n_e_x_t-_l_i_n_e which knows how to move a down
line, and C-N moves down a line because it is connected  to  that
command.   The name for this connection is a _b_i_n_d_i_n_g; we say that
the key C-N _i_s _b_o_u_n_d _t_o the command _n_e_x_t-_l_i_n_e.

Not all commands are bound to keys.  To  invoke  a  command  that
isn't  bound  to a key, you can type the sequence ESC X, which is



                           May 2, 1988





JOVE Manual for UNIX Users                               USD:17-5


bound to the command _e_x_e_c_u_t_e-_n_a_m_e_d-_c_o_m_m_a_n_d.   You  will  then  be
able  to type the name of whatever command you want to execute on
the message line.

Sometimes the description of a command will say "to change  this,
set  the  variable  _m_u_m_b_l_e-_f_o_o".   A  variable  is a name used to
remember a value.  JOVE contains variables  which  are  there  so
that  you  can  change  them  if  you  want  to  customize.   The
variable's value is examined by some command, and  changing  that
value  makes  the  command  behave  differently.   Until  you are
interesting in customizing JOVE, you can ignore this information.

_4._1.  _P_r_e_f_i_x _C_h_a_r_a_c_t_e_r_s

Because there are more command names  than  keys,  JOVE  provides
_p_r_e_f_i_x  _c_h_a_r_a_c_t_e_r_s to increase the number of commands that can be
invoked quickly and easily.  When you  type  a  prefix  character
JOVE  will wait for another character before deciding what to do.
If you wait more than a second or so, JOVE will print the  prefix
character  on the message line as a reminder and leave the cursor
down there until you type your next  character.   There  are  two
prefix characters built into JOVE: Escape and Control-X.  How the
next character is interpreted depends on which  prefix  character
you  typed.  For example, if you type Escape followed by B you'll
run _b_a_c_k_w_a_r_d-_w_o_r_d, but if you type Control-X followed by B you'll
run  _s_e_l_e_c_t-_b_u_f_f_e_r.   Elsewhere in this manual, the Escape key is
indicated as "ESC", which is also what JOVE displays on the  mes-
sage line for Escape.

_4._2.  _H_e_l_p

To get a list of keys and their associated commands, you type ESC
X _d_e_s_c_r_i_b_e-_b_i_n_d_i_n_g_s.  If you want to describe a single key, ESC X
_d_e_s_c_r_i_b_e-_k_e_y will work.  A description of an  individual  command
is available by using ESC X _d_e_s_c_r_i_b_e-_c_o_m_m_a_n_d, and descriptions of
variables by  using   ESC  X  _d_e_s_c_r_i_b_e-_v_a_r_i_a_b_l_e.   If  you  can't
remember  the  name  of  the  thing you want to know about, ESC X
_a_p_r_o_p_o_s will tell you if a command or variable has a given string
in  its  name.  For example, ESC X _a_p_r_o_p_o_s _d_e_s_c_r_i_b_e will list the
names of the four describe commands  mentioned  briefly  in  this
section.

_5.  _B_a_s_i_c _E_d_i_t_i_n_g _C_o_m_m_a_n_d_s


_5._1.  _I_n_s_e_r_t_i_n_g _T_e_x_t

To insert printing characters into the text you are editing, just
type  them.   All  printing characters you type are inserted into
the text at the cursor (that is, at _p_o_i_n_t), and the cursor  moves
forward.   Any  characters after the cursor move forward too.  If
the text in the buffer is FOOBAR, with the cursor before  the  B,
then  if  you  type  XX,  you get FOOXXBAR, with the cursor still
before the B.



                           May 2, 1988





USD:17-6                               JOVE Manual for UNIX Users


To correct text you have  just  inserted,  you  can  use  Rubout.
Rubout  deletes the character _b_e_f_o_r_e the cursor (not the one that
the cursor is on top of or under; that is the character _a_f_t_e_r the
cursor).   The cursor and all characters after it move backwards.
Therefore, if you typing  a  printing  character  and  then  type
Rubout, they cancel out.

To end a line and start typing a new one,  type  Return.   Return
operates  by inserting a _l_i_n_e-_s_e_p_a_r_a_t_o_r, so if you type Return in
the middle of a line, you break  the  line  in  two.   Because  a
line-separator is just a single character, you can type Rubout at
the beginning of a line to delete the line-separator and join  it
with the preceding line.

As a special case, if you type Return at the end of  a  line  and
there  are  two  or more empty lines just below it, JOVE does not
insert a line-separator but instead  merely  moves  to  the  next
(empty)  line.   This behavior is convenient when you want to add
several lines of text in the middle of a buffer.  You can use the
Control-O  (_n_e_w_l_i_n_e-_a_n_d-_b_a_c_k_u_p)  command  to "open" several empty
lines at once; then you can insert the new text, filling up these
empty  lines.  The advantage is that JOVE does not have to redraw
the bottom part of the screen for each Return  you  type,  as  it
would  ordinarily.   That  "redisplay"  can be both slow and dis-
tracting.

If you add too many characters to one line, without  breaking  it
with Return, the line will grow too long to display on one screen
line.  When this happens, JOVE puts an "!" at the  extreme  right
margin, and doesn't bother to display the rest of the line unless
the cursor happens to be in it.  The "!"  is  not  part  of  your
text;  conversely,  even  though  you  can't see the rest of your
line, it's still there, and if you break the line, the  "!"  will
go away.

Direct insertion works for printing  characters  and  space,  but
other  characters act as editing commands and do not insert them-
selves.  If you need to insert a control  character,  Escape,  or
Rubout,  you  must first _q_u_o_t_e it by typing the Control-Q command
first.

_5._2.  _M_o_v_i_n_g _t_h_e _C_u_r_s_o_r

To do more than insert characters, you have to know how  to  move
the cursor.  Here are a few of the commands for doing that.

C-A            Move to the beginning of the line.

C-E            Move to the end of the line.

C-F            Move forward over one character.

C-B            Move backward over one character.




                           May 2, 1988





JOVE Manual for UNIX Users                               USD:17-7


C-N            Move down one line, vertically.  If you  start  in
               the  middle  of one line, you end in the middle of
               the next.

C-P            Move up one line, vertically.

ESC <          Move to the beginning of the entire buffer.

ESC >          Move to the end of the entire buffer.

ESC ,          Move to the beginning of the visible window.

ESC .          Move to the end of the visible window.

_5._3.  _E_r_a_s_i_n_g _T_e_x_t


Rubout         Delete the character before the cursor.

C-D            Delete the character after the cursor.

C-K            Kill to the end of the line.

You already know about the Rubout command which deletes the char-
acter before the cursor.  Another command, Control-D, deletes the
character after the cursor, causing the rest of the text  on  the
line  to shift left.  If Control-D is typed at the end of a line,
that line and the next line are joined together.

To erase a larger amount of  text,  use  the  Control-K  command,
which kills a line at a time.  If Control-K is done at the begin-
ning or middle of a line, it kills all the text up to the end  of
the  line.   If  Control-K is done at the end of a line, it joins
that line and the next line.  If  Control-K  is  done  twice,  it
kills the rest of the line and the line separator also.

_5._4.  _F_i_l_e_s - _S_a_v_i_n_g _Y_o_u_r _W_o_r_k

The commands above are sufficient for creating text in  the  JOVE
buffer.  The more advanced JOVE commands just make things easier.
But to keep any text permanently you  must  put  it  in  a  _f_i_l_e.
Files are the objects which UNIX|- uses for  storing  data  for  a
length  of time.  To tell JOVE to read text into a file, choose a
filename, such as _f_o_o._b_a_r,  and  type  C-X  C-R  _f_o_o._b_a_r<return>.
This  reads  the  file _f_o_o._b_a_r so that its contents appear on the
screen for editing.  You can make changes, and then save the file
by  typing C-X C-S (save-file).  This makes the changes permanent
and actually changes the file _f_o_o._b_a_r.  Until then,  the  changes
are only inside JOVE, and the file _f_o_o._b_a_r is not really changed.
If the file _f_o_o._b_a_r doesn't exist, and you  want  to  create  it,
read it as if it did exist.  When you save your text with C-X C-S
_________________________
|- UNIX is a trademark of Bell Laboratories.




                           May 2, 1988





USD:17-8                               JOVE Manual for UNIX Users


the file will be created.

_5._5.  _E_x_i_t_i_n_g _a_n_d _P_a_u_s_i_n_g - _L_e_a_v_i_n_g _J_O_V_E

The command C-X C-C (_e_x_i_t-_j_o_v_e) will terminate the  JOVE  session
and  return  to  the  shell.   If  there are modified but unsaved
buffers, JOVE will ask you for confirmation, and  you  can  abort
the  command, look at what buffers are modified but unsaved using
C-X C-B (_l_i_s_t-_b_u_f_f_e_r_s), save the valuable ones,  and  then  exit.
If  what you want to do, on the other hand, is _p_r_e_s_e_r_v_e the edit-
ing session but return to the shell temporarily  you  can  (under
Berkeley UNIX only) issue the command ESC S (_p_a_u_s_e-_j_o_v_e), do your
UNIX work within the c-shell, then return to JOVE  using  the  _f_g
command  to  resume  editing  at the point where you paused.  For
this sort of situation you might consider  using  an  _i_n_t_e_r_a_c_t_i_v_e
_s_h_e_l_l (that is, a shell in a JOVE window) which lets you use edi-
tor commands to manipulate your UNIX commands (and their  output)
while  never  leaving the editor.  (The interactive shell feature
is described below.)

_5._6.  _G_i_v_i_n_g _N_u_m_e_r_i_c _A_r_g_u_m_e_n_t_s _t_o _J_O_V_E _C_o_m_m_a_n_d_s

Any JOVE command can be given a _n_u_m_e_r_i_c _a_r_g_u_m_e_n_t.  Some  commands
interpret  the argument as a repetition count.  For example, giv-
ing an argument of ten to  the  C-F  command  (forward-character)
moves  forward  ten characters.  With these commands, no argument
is equivalent to an argument of 1.

Some commands use the value of the  argument,  but  do  something
peculiar  (or  nothing)  when there is no argument.  For example,
ESC G (_g_o_t_o-_l_i_n_e) with an argument n goes to the beginning of the
n'th  line.   But  ESC  G  with  no argument doesn't do anything.
Similarly, C-K with an argument kills that many lines,  including
their  line  separators.   Without an argument, C-K when there is
text on the line to the right of the cursor kills that text; when
there  is  no text after the cursor, C-K deletes the line separa-
tor.

The fundamental way of specifying an argument is to use ESC  fol-
lowed  by  the digits of the argument, for example, ESC 123 ESC G
to go to line 123. Negative arguments are allowed,  although  not
all of the commands know what to do with one.

Typing C-U means do the next command four times.  Two such  C-U's
multiply  the  next  command by sixteen.  Thus, C-U C-U C-F moves
forward sixteen characters.  This is a good way to  move  forward
quickly,  since  it  moves about 1/4 of a line on most terminals.
Other useful combinations are: C-U C-U  C-N  (move  down  a  good
fraction  of  the  screen),  C-U  C-U  C-O (make "a lot" of blank
lines), and C-U C-K (kill four lines - note that typing C-K  four
times would kill 2 lines).

There are other, terminal-dependent ways of specifying arguments.
They  have  the  same  effect but may be easier to type.  If your



                           May 2, 1988





JOVE Manual for UNIX Users                               USD:17-9


terminal has a numeric keypad which sends something  recognizably
different  from  the  ordinary  digits, it is possible to program
JOVE to to allow use of the numeric keypad for  specifying  argu-
ments.

_5._7.  _T_h_e _M_a_r_k _a_n_d _t_h_e _R_e_g_i_o_n

In general, a command that processes an  arbitrary  part  of  the
buffer must know where to start and where to stop.  In JOVE, such
commands usually operate on the text between point and _t_h_e  _m_a_r_k.
This body of text is called _t_h_e _r_e_g_i_o_n.  To specify a region, you
set point to one end of it and mark at  the  other.   It  doesn't
matter which one comes earlier in the text.

C-@            Set the mark where point is.

C-X C-X        Interchange mark and point.

For example, if you wish to convert part of  the  buffer  to  all
upper-case,  you  can  use the C-X C-U command, which operates on
the text in the region.  You can first go to the beginning of the
text  to be capitalized, put the mark there, move to the end, and
then type C-X C-U.  Or, you can set the mark at the  end  of  the
text, move to the beginning, and then type C-X C-U.  C-X C-U runs
the command _c_a_s_e-_r_e_g_i_o_n-_u_p_p_e_r,  whose  name  signifies  that  the
region,  or  everything between point and mark, is to be capital-
ized.

The way to set the mark is with the C-@ command or (on some  ter-
minals)  the  C-Space command.  They set the mark where point is.
Then you can move point away, leaving mark behind.  When the mark
is set, "[Point pushed]" is printed on the message line.

Since terminals have only one cursor, there is no way for JOVE to
show  you  where the mark is located.  You have to remember.  The
usual solution to this problem is to set the mark and then use it
soon,  before  you forget where it is.  But you can see where the
mark is with the command C-X C-X which puts the mark where  point
was  and  point  where  mark  was.   The  extent of the region is
unchanged, but the cursor and point are now at the previous loca-
tion of the mark.

_5._8.  _T_h_e _R_i_n_g _o_f _M_a_r_k_s

Aside from delimiting the region, the mark  is  also  useful  for
remembering a spot that you may want to go back to.  To make this
feature more useful, JOVE remembers 16 previous locations of  the
mark.   Most  commands  that  set the mark push the old mark onto
this stack.  To return to a marked location, use C-U  C-@.   This
moves point to where the mark was, and restores the mark from the
stack of former marks.  So repeated use  of  this  command  moves
point  to  all  of the old marks on the stack, one by one.  Since
the stack is actually a ring, enough uses of C-U C-@ bring  point
back to where it was originally.



                           May 2, 1988





USD:17-10                              JOVE Manual for UNIX Users


Some commands whose primary purpose is to move point a great dis-
tance  take  advantage of the stack of marks to give you a way to
undo the command.  The best example is ESC <, which moves to  the
beginning of the buffer.  If there are more than 22 lines between
the beginning of the buffer and point, ESC < sets the mark first,
so  that  you  can use C-U C-@ or C-X C-X to go back to where you
were.  You can change the number of lines from  22  since  it  is
kept in the variable _m_a_r_k-_t_h_r_e_s_h_o_l_d.  By setting it to 0, you can
make these commands always set the mark.  By setting it to a very
large number you can prevent these commands from ever setting the
mark.  If a command decides to set the mark, it prints  the  mes-
sage [_P_o_i_n_t _p_u_s_h_e_d].

_5._9.  _K_i_l_l_i_n_g _a_n_d _M_o_v_i_n_g _T_e_x_t

The most common way of moving or copying text  with  JOVE  is  to
kill  it,  and  get it back again in one or more places.  This is
very safe because the last several pieces of killed text are  all
remembered,  and  it  is versatile, because the many commands for
killing syntactic units can also be used for moving those  units.
There are also other ways of moving text for special purposes.

_5._1_0.  _D_e_l_e_t_i_o_n _a_n_d _K_i_l_l_i_n_g

Most commands which erase text from the buffer save  it  so  that
you  can  get it back if you change your mind, or move or copy it
to other parts of the buffer.  These commands are known  as  _k_i_l_l
commands.   The  rest of the commands that erase text do not save
it; they are known  as  _d_e_l_e_t_e  commands.   The  delete  commands
include  C-D  and  Rubout,  which  delete only one character at a
time, and those commands that delete only spaces or line  separa-
tors.   Commands  that  can  destroy  significant amounts of non-
trivial data generally kill.  A command's  name  and  description
will use the words _k_i_l_l or _d_e_l_e_t_e to say which one it does.

C-D                 Delete next character.

Rubout              Delete previous character.

ESC \               Delete spaces and tabs around point.

C-X C-O             Delete blank lines around the current line.

C-K                 Kill rest of line or one or more lines.

C-W                 Kill region (from point to the mark).

ESC D               Kill word.

ESC Rubout          Kill word backwards.

ESC K               Kill to end of sentence.

C-X Rubout          Kill to beginning of sentence.



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-11


_5._1_1.  _D_e_l_e_t_i_o_n

The most basic delete commands are C-D and Rubout.   C-D  deletes
the character after the cursor, the one the cursor is "on top of"
or "underneath".  The cursor doesn't move.   Rubout  deletes  the
character  before  the  cursor,  and moves the cursor back.  Line
separators act like normal characters  when  deleted.   Actually,
C-D  and  Rubout  aren't  always  _d_e_l_e_t_e commands; if you give an
argument, they _k_i_l_l instead.  This prevents  you  from  losing  a
great deal of text by typing a large argument to a C-D or Rubout.

The other delete commands are those which delete only  formatting
characters:  spaces,  tabs,  and line separators.  ESC \ (_d_e_l_e_t_e-
_w_h_i_t_e-_s_p_a_c_e) deletes all the spaces and tab characters before and
after  point.   C-X  C-O  (_d_e_l_e_t_e-_b_l_a_n_k-_l_i_n_e_s)  deletes all blank
lines after the current line, and if the current  line  is  blank
deletes  all  the  blank lines preceding the current line as well
(leaving one blank line, the current line).

_5._1_2.  _K_i_l_l_i_n_g _b_y _L_i_n_e_s

The simplest kill command is the C-K command.  If issued  at  the
beginning  of  a line, it kills all the text on the line, leaving
it blank.  If given on a line containing only white space (blanks
and  tabs)  the  line disappears.  As a consequence, if you go to
the front of a non-blank line and type two C-K's, the line disap-
pears completely.

More generally, C-K kills from point up to the end of  the  line,
unless  it  is  at the end of a line.  In that case, it kills the
line separator following the line, thus  merging  the  next  line
into  the  current  one.  Invisible spaces and tabs at the end of
the line are ignored when deciding  which  case  applies,  so  if
point  appears  to be at the end of the line, you can be sure the
line separator will be killed.

C-K with an argument of zero kills all the text before  point  on
the current line.

_5._1_3.  _O_t_h_e_r _K_i_l_l _C_o_m_m_a_n_d_s

A kill command which is very general is C-W (_k_i_l_l-_r_e_g_i_o_n),  which
kills everything between point and the mark.* With this  command,
you can kill and save contiguous characters, if you first set the
mark at one end of them and go to the other end.

Other syntactic units can be killed, too; words, with ESC  Rubout
and ESC D; and, sentences, with ESC K and C-X Rubout.


_________________________
*Often users switch this binding from C-W  to  C-X  C-K
because it is too easy to hit C-W accidentally.




                           May 2, 1988





USD:17-12                              JOVE Manual for UNIX Users


_5._1_4.  _U_n-_k_i_l_l_i_n_g

Un-killing (yanking) is getting back text which was killed.   The
usual  way to move or copy text is to kill it and then un-kill it
one or more times.

C-Y       Yank (re-insert) last killed text.

ESC Y     Replace re-inserted killed  text  with  the  previously
          killed text.

ESC W     Save region as last killed text without killing.

Killed text is pushed onto a _r_i_n_g _b_u_f_f_e_r  called  the  _k_i_l_l  _r_i_n_g
that remembers the last 10 blocks of text that were killed.  (Why
it is called a ring buffer will be explained below).  The command
C-Y (_y_a_n_k) reinserts the text of the most recent kill.  It leaves
the cursor at the end of the text,  and  puts  the  mark  at  the
beginning.  Thus, a single C-Y undoes the C-W.

If you wish to copy a block of text, you might want to use ESC  W
(_c_o_p_y-_r_e_g_i_o_n), which copies the region into the kill ring without
removing it from the buffer.  This is approximately equivalent to
C-W  followed  by C-Y, except that ESC W does not mark the buffer
as "changed" and does not cause the screen to be rewritten.

There is only one kill ring shared among all the buffers.   After
visiting  a  new  file,  whatever was last killed in the previous
file is still on top of the kill ring.   This  is  important  for
moving text between files.

_5._1_5.  _A_p_p_e_n_d_i_n_g _K_i_l_l_s

Normally, each kill command pushes a  new  block  onto  the  kill
ring.   However,  two  or more kill commands immediately in a row
(without any other intervening commands) combine their text  into
a  single entry on the ring, so that a single C-Y command gets it
all back as it was before it was killed.   This  means  that  you
don't have to kill all the text in one command; you can keep kil-
ling line after line, or word after word, until you  have  killed
it all, and you can still get it all back at once.

Commands that kill forward from _p_o_i_n_t add onto  the  end  of  the
previous killed text.  Commands that kill backward from _p_o_i_n_t add
onto the beginning.  This way, any sequence of mixed forward  and
backward  kill  commands  puts all the killed text into one entry
without needing rearrangement.

_5._1_6.  _U_n-_k_i_l_l_i_n_g _E_a_r_l_i_e_r _K_i_l_l_s

To recover killed text that is no longer the  most  recent  kill,
you  need the ESC Y (_y_a_n_k-_p_o_p) command.  The ESC Y command can be
used only after a C-Y (yank) command or another ESC Y.  It  takes
the  un-killed  text inserted by the C-Y and replaces it with the



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-13


text from an earlier kill.  So, to recover the text of the  next-
to-the-last kill, you first use C-Y to recover the last kill, and
then discard it by use of ESC Y to  move  back  to  the  previous
kill.

You can think of all the last few kills  as  living  on  a  ring.
After  a  C-Y  command, the text at the front of the ring is also
present in the buffer.  ESC Y "rotates"  the  ring  bringing  the
previous  string  of text to the front and this text replaces the
other text in the buffer as well.   Enough  ESC  Y  commands  can
rotate  any  part of the ring to the front, so you can get at any
killed text so long as it is recent enough to  be  still  in  the
ring.   Eventually  the  ring  rotates all the way around and the
most recently killed text  comes  to  the  front  (and  into  the
buffer)  again.   ESC Y with a negative argument rotates the ring
backwards.

When the text you are looking for is brought into the buffer, you
can stop doing ESC Y's and the text will stay there.  It's really
just a copy of what's at the front of the  ring,  so  editing  it
does  not change what's in the ring.  And the ring, once rotated,
stays rotated, so that doing another C-Y  gets  another  copy  of
what you rotated to the front with ESC Y.

If you change your mind about un-killing, C-W  gets  rid  of  the
un-killed text, even after any number of ESC Y's.

_6.  _S_e_a_r_c_h_i_n_g

The search commands are useful for finding and  moving  to  arbi-
trary  positions in the buffer in one swift motion.  For example,
if you just ran the spell program on a  paper  and  you  want  to
correct  some  word,  you  can  use  the  search commands to move
directly to that word.  There are two flavors of  search:  _s_t_r_i_n_g
_s_e_a_r_c_h  and  _i_n_c_r_e_m_e_n_t_a_l  _s_e_a_r_c_h.   The  former  is  the  default
flavor-if you want to use incremental search you  must  rearrange
the key bindings (see below).

_6._1.  _C_o_n_v_e_n_t_i_o_n_a_l _S_e_a_r_c_h


C-S            Search forward.

C-R            Search backward.

To search for the string "FOO" you type  "C-S  FOO<return>".   If
JOVE  finds  FOO  it moves point to the end of it; otherwise JOVE
prints an error message and leaves point unchanged.  C-S searches
forward  from  point  so  only occurrences of FOO after point are
found.  To search in the other direction use C-R.  It is  exactly
the same as C-S except it searches in the opposite direction, and
if it finds the string, it leaves point at the beginning  of  it,
not at the end as in C-S.




                           May 2, 1988





USD:17-14                              JOVE Manual for UNIX Users


While JOVE is searching it prints the search string on  the  mes-
sage  line.   This  is  so you know what JOVE is doing.  When the
system is heavily  loaded  and  editing  in  exceptionally  large
buffers, searches can take several (sometimes many) seconds.

JOVE remembers the last search string you used, so if you want to
search  for  the same string you can type "C-S <return>".  If you
mistyped the last search string, you can type C-S followed by  C-
R.   C-R,  as  usual,  inserts the default search string into the
minibuffer, and then you can fix it up.

_6._2.  _I_n_c_r_e_m_e_n_t_a_l _S_e_a_r_c_h

This search command is unusual in  that  is  is  _i_n_c_r_e_m_e_n_t_a_l;  it
begins  to  search  before  you  have  typed  the complete search
string.  As you type in the search string, JOVE shows  you  where
it  would  be  found.   When  you have typed enough characters to
identify the place you want, you can stop.  Depending on what you
will  do  next,  you  may or may not need to terminate the search
explicitly with a Return first.

The command to search is C-S (_i-_s_e_a_r_c_h-_f_o_r_w_a_r_d).   C-S  reads  in
characters  and  positions  the cursor at the first occurrence of
the characters that you have typed so far.  If you type  C-S  and
then  F,  the  cursor  moves in the text just after the next "F".
Type an "O", and see the cursor move  to  after  the  next  "FO".
After  another  "O",  the cursor is after the next "FOO".  At the
same time, the "FOO" has echoed on the message line.

If you type a mistaken character, you can rub it out.  After  the
FOO,  typing  a  Rubout  makes the "O" disappear from the message
line, leaving only "FO".  The cursor moves back in the buffer  to
the  "FO".   Rubbing out the "O" and "F" moves the cursor back to
where you started the search.

When you are satisfied with the place you have reached,  you  can
type  a  Return,  which stops searching, leaving the cursor where
the search brought it.  Also, any command not specially  meaning-
ful  in searches stops the searching and is then executed.  Thus,
typing C-A would exit the search and then move to  the  beginning
of  the line.  Return is necessary only if the next character you
want to type is a printing character, Rubout, Return, or  another
search  command, since those are the characters that have special
meanings inside the search.

Sometimes you search for "FOO" and find it, but not the  one  you
hoped  to  find.   Perhaps  there is a second FOO that you forgot
about, after the one you just found.  Then type another  C-S  and
the  cursor  will find the next FOO.  This can be done any number
of times.  If you overshoot, you can return to previous finds  by
rubbing out the C-S's.

After you exit a search, you can search for the same string again
by  typing  just C-S C-S: one C-S command to start the search and



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-15


then another C-S to mean "search again for the same string".

If your string is not found at all, the message line says  "Fail-
ing I-search".  The cursor is after the place where JOVE found as
much of your string as it could.  Thus, if you  search  for  FOOT
and  there  is no FOOT, you might see the cursor after the FOO in
FOOL.  At this point there are several things  you  can  do.   If
your  string was mistyped, you can rub some of it out and correct
it.  If you like the place you have found, you can type Return or
some  other JOVE command to "accept what the search offered".  Or
you can type C-G, which undoes the search  altogether  and  posi-
tions you back where you started the search.

You can also type C-R at any time to start  searching  backwards.
If  a  search fails because the place you started was too late in
the file, you should do this.  Repeated C-R's keep looking  back-
ward  for  more  occurrences  of  the  last search string.  A C-S
starts going forward again.  C-R's can be rubbed  out  just  like
anything else.

_6._3.  _S_e_a_r_c_h_i_n_g _w_i_t_h _R_e_g_u_l_a_r _E_x_p_r_e_s_s_i_o_n_s

In addition to the searching facilities described above, JOVE can
search  for  patterns using regular expressions.  The handling of
regular expressions in JOVE is like that of _e_d(_1) or  _v_i(_1),  but
with some notable additions.  The extra metacharacters understood
by JOVE are \<, \>, \| and \{.  The first two of these match  the
beginnings  and  endings  of  words;  Thus  the  search  pattern,
"\<Exec" would match all words beginning with the letters "Exec".

An \| signals the beginning of an alternative - that is, the pat-
tern  "foo\|bar"  would  match either "foo" or "bar".  The "curly
brace" is a way of introducing several  sub-alternatives  into  a
pattern.   It  parallels the [] construct of regular expressions,
except it specifies a list of alternative words instead  of  just
alternative   characters.   So  the  pattern  "foo\{bar,baz\}bie"
matches "foobarbie" or "foobazbie".

JOVE only regards  metacharacters  as  special  if  the  variable
_m_a_t_c_h-_r_e_g_u_l_a_r-_e_x_p_r_e_s_s_i_o_n_s  is  set  to "on".  The ability to have
JOVE ignore these characters is useful if you're editing a  docu-
ment  about  patterns and regular expressions or when a novice is
learning JOVE.

Another variable that affects  searching  is  _c_a_s_e-_i_g_n_o_r_e-_s_e_a_r_c_h.
If  this  variable  is set to "on" then upper case and lower case
letters are considered equal.

_7.  _R_e_p_l_a_c_e_m_e_n_t _C_o_m_m_a_n_d_s

Global search-and-replace operations are not needed as  often  in
JOVE  as  they  are in other editors, but they are available.  In
addition to the simple Replace operation which is like that found
in  most  editors, there is a Query Replace operation which asks,



                           May 2, 1988





USD:17-16                              JOVE Manual for UNIX Users


for each occurrence of the pattern, whether to replace it.

_7._1.  _G_l_o_b_a_l _r_e_p_l_a_c_e_m_e_n_t

To replace every occurrence of FOO after point with BAR, you  can
do, e.g., "ESC R FOO<return>BAR" as the _r_e_p_l_a_c_e-_s_t_r_i_n_g command is
bound to the ESC R.  Replacement takes place only  between  point
and  the  end  of  the  buffer  so if you want to cover the whole
buffer you must go to the beginning first.

_7._2.  _Q_u_e_r_y _R_e_p_l_a_c_e

If you want to change only some of the occurrences  of  FOO,  not
all,  then  the  global _r_e_p_l_a_c_e-_s_t_r_i_n_g is inappropriate; Instead,
use, e.g., "ESC Q FOO<return>BAR",  to  run  the  command  _q_u_e_r_y-
_r_e_p_l_a_c_e-_s_t_r_i_n_g.   This  displays each occurrence of FOO and waits
for you to say whether to replace it with a BAR.  The things  you
can type when you are shown an occurrence of FOO are:

Space          to replace the FOO.

Rubout         to skip to the next  FOO  without  replacing  this
               one.

Return         to stop without doing any more replacements.

Period         to replace this FOO and then stop.

! or P         to replace all remaining FOO's without asking.

C-R or R       to enter a recursive editing level,  in  case  the
               FOO  needs  to be edited rather than just replaced
               with a BAR.  When you are done, exit the recursive
               editing  level  with C-X C-C and the next FOO will
               be displayed.

C-W            to delete the FOO,  and  then  start  editing  the
               buffer.  When you are finished editing whatever is
               to replace the FOO,  exit  the  recursive  editing
               level  with  C-X  C-C  and  the  next  FOO will be
               displayed.

U              move to the last replacement and undo it.

Another alternative is using _r_e_p_l_a_c_e-_i_n-_r_e_g_i_o_n which is just like
_r_e_p_l_a_c_e-_s_t_r_i_n_g except it searches only within the region.


_8.  _C_o_m_m_a_n_d_s _f_o_r _E_n_g_l_i_s_h _T_e_x_t

JOVE has many commands that work on the basic  units  of  English
text: words, sentences and paragraphs.





                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-17


_8._1.  _W_o_r_d _C_o_m_m_a_n_d_s

JOVE has commands for moving over or operating on words.  By con-
vention, they are all ESC commands.

ESC F               Move Forward over a word.

ESC B               Move Backward over a word.

ESC D               Kill forward to the end of a word.

ESC Rubout          Kill backward to the beginning of a word.

Notice how  these  commands  form  a  group  that  parallels  the
character- based commands, C-F, C-B, C-D, and Rubout.

The commands ESC F and ESC  B  move  forward  and  backward  over
words.  They are thus analogous to Control-F and Control-B, which
move over single characters.  Like their Control- analogues,  ESC
F  and ESC B move several words if given an argument.  ESC F with
a negative argument moves backward like ESC B, and ESC B  with  a
negative  argument  moves  forward.   Forward  motion stops right
after the last letter of the word, while  backward  motion  stops
right before the first letter.

It is easy to kill a word at a time.  ESC D kills the word  after
point.   To  be  precise,  it  kills everything from point to the
place ESC F would move to.  Thus, if point is in the middle of  a
word,  only  the part after point is killed.  If some punctuation
comes after point, and before the next word, it is  killed  along
with  the  word.   If you wish to kill only the next word but not
the punctuation, simply do ESC F to get to the end, and kill  the
word  backwards with ESC Rubout.  ESC D takes arguments just like
ESC F.

ESC Rubout kills the word before point.  It kills everything from
point  back  to where ESC B would move to.  If point is after the
space in "FOO, BAR", then "FOO, " is killed.  If you wish to kill
just "FOO", then do a ESC B and a ESC D instead of a ESC Rubout.

_8._2.  _S_e_n_t_e_n_c_e _C_o_m_m_a_n_d_s

The JOVE commands for manipulating sentences and  paragraphs  are
mostly  ESC  commands,  so  as to resemble the word-handling com-
mands.

ESC A               Move back to the beginning of the sentence.

ESC E               Move forward to the end of the sentence.

ESC K               Kill forward to the end of the sentence.

C-X Rubout          Kill back to the beginning of the sentence.




                           May 2, 1988





USD:17-18                              JOVE Manual for UNIX Users


The commands ESC A and ESC E move to the beginning and end of the
current  sentence,  respectively.   They  were chosen to resemble
Control-A and Control-E, which move to the beginning and end of a
line.   Unlike them, ESC A and ESC E if repeated or given numeric
arguments move over successive sentences.  JOVE considers a  sen-
tence to end wherever there is a ".", "?", or "!" followed by the
end of a line or by one or more spaces.  Neither ESC A nor ESC  E
moves  past  the end of the line or spaces which delimit the sen-
tence.

Just as C-A and C-E have a kill command, C-K, to go with them, so
ESC  A  and  ESC  E have a corresponding kill command ESC K which
kills from point to the end of the sentence.  With minus  one  as
an  argument  it  kills  back  to  the beginning of the sentence.
Positive arguments serve as a repeat count.

There is a special command, C-X Rubout for killing  back  to  the
beginning  of  a sentence, because this is useful when you change
your mind in the middle of composing text.

_8._3.  _P_a_r_a_g_r_a_p_h _C_o_m_m_a_n_d_s

The JOVE commands for handling paragraphs are

ESC [               Move back to previous paragraph beginning.

ESC ]               Move forward to next paragraph end.

ESC [ moves to the beginning of the  current  or  previous  para-
graph,  while ESC ] moves to the end of the current or next para-
graph.  Paragraphs are delimited by lines of differing indent, or
lines  with  text formatter commands, or blank lines.  JOVE knows
how to deal with most indented paragraphs correctly, although  it
can get confused by one- or two-line paragraphs delimited only by
indentation.

_8._4.  _T_e_x_t _I_n_d_e_n_t_a_t_i_o_n _C_o_m_m_a_n_d_s


Tab                 Indent "appropriately"  in  a  mode-dependent
                    fashion.

LineFeed            Is the same as Return, except it  copies  the
                    indent of the line you just left.

ESC M               Moves to the line's first  non-blank  charac-
                    ter.


The way to request indentation is with the Tab command.  Its pre-
cise  effect depends on the major mode.  In _T_e_x_t mode, it indents
to the next tab stop.  In _C mode, it indents to the "right" posi-
tion for C programs.




                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-19


To move over the indentation on a  line,  do  ESC  M  (_f_i_r_s_t-_n_o_n-
_b_l_a_n_k).   This  command,  given anywhere on a line, positions the
cursor at the first non-blank, non-tab character on the line.

_8._5.  _T_e_x_t _F_i_l_l_i_n_g

_A_u_t_o _F_i_l_l mode causes text to be _f_i_l_l_e_d  (broken  up  into  lines
that  fit  in a specified width) automatically as you type it in.
If you alter existing text so  that  it  is  no  longer  properly
filled, JOVE can fill it again if you ask.

Entering _A_u_t_o _F_i_l_l mode is done with ESC X _a_u_t_o-_f_i_l_l-_m_o_d_e.   From
then  on,  lines are broken automatically at spaces when they get
longer than the desired width.  To leave  _A_u_t_o  _F_i_l_l  mode,  once
again  execute  ESC  X _a_u_t_o-_f_i_l_l-_m_o_d_e.  When _A_u_t_o _F_i_l_l mode is in
effect, the word Fill appears in the mode line.

If you edit the middle of a paragraph, it may no longer correctly
be  filled.   To refill a paragraph, use the command ESC J (_f_i_l_l-
_p_a_r_a_g_r_a_p_h).  It causes the paragraph that point is inside  to  be
filled.   All  the  line breaks are removed and new ones inserted
where necessary.

The maximum line width for filling  is  in  the  variable  _r_i_g_h_t-
_m_a_r_g_i_n.   Both ESC J and auto-fill make sure that no line exceeds
this width.  The value of _r_i_g_h_t-_m_a_r_g_i_n is initially 78.

Normally ESC J figures out the indent of the paragraph  and  uses
that  same indent when filling.  If you want to change the indent
of a paragraph you set _l_e_f_t-_m_a_r_g_i_n to the new position  and  type
C-U ESC J.   _f_i_l_l-_p_a_r_a_g_r_a_p_h,  when  supplied  a numeric argument,
uses the value of _l_e_f_t-_m_a_r_g_i_n.

If you know where you want to set the right margin but you  don't
know  the  actual  value, move to where you want to set the value
and use the _r_i_g_h_t-_m_a_r_g_i_n-_h_e_r_e command.  _l_e_f_t-_m_a_r_g_i_n-_h_e_r_e does the
same for the _l_e_f_t-_m_a_r_g_i_n variable.

_8._6.  _C_a_s_e _C_o_n_v_e_r_s_i_o_n _C_o_m_m_a_n_d_s


ESC L          Convert following word to lower case.

ESC U          Convert following word to upper case.

ESC C          Capitalize the following word.


The word conversion commands are most useful.  ESC L converts the
word after point to lower case, moving past it.  Thus, successive
ESC L's convert successive words.  ESC U converts to all capitals
instead, while ESC C puts the first letter of the word into upper
case and the rest into lower case.  All  these  commands  convert
several  words at once if given an argument.  They are especially



                           May 2, 1988





USD:17-20                              JOVE Manual for UNIX Users


convenient for converting a large amount of text from  all  upper
case  to  mixed case, because you can move through the test using
ESC L, ESC U or ESC C on each word as appropriate.

When given a negative argument, the word case conversion commands
apply to the appropriate number of words before point, but do not
move point.  This is convenient when you have just typed  a  word
in  the wrong case.  You can give the case conversion command and
continue typing.

If a word case conversion command is given in  the  middle  of  a
word,  it  applies only to the part of the word which follows the
cursor, treating it as a whole word.

The other case conversion  functions  are  _c_a_s_e-_r_e_g_i_o_n-_u_p_p_e_r  and
_c_a_s_e-_r_e_g_i_o_n-_l_o_w_e_r,  which  convert  everything  between point and
mark to the specified case.  Point and mark remain unchanged.

_8._7.  _C_o_m_m_a_n_d_s _f_o_r _F_i_x_i_n_g _T_y_p_o_s

In this section we describe the commands that are especially use-
ful for the times when you catch a mistake on your text after you
have made it, or change your mind while composing text on line.

Rubout                   Delete last character.

ESC Rubout               Kill last word.

C-X Rubout               Kill to beginning of sentence.

C-T                      Transpose two characters.

C-X C-T                  Transpose two lines.

ESC Minus ESC L          Convert last word to lower case.

ESC Minus ESC U          Convert last word to upper case.

ESC Minus ESC C          Convert last word  to  lower  case  with
                         capital initial.


_8._8.  _K_i_l_l_i_n_g _Y_o_u_r _M_i_s_t_a_k_e_s

The Rubout command is  the  most  important  correction  command.
When  used  among printing (self-inserting) characters, it can be
thought of as canceling the last character typed.

When your mistake is longer than a couple of characters, it might
be  more  convenient to use ESC Rubout or C-X Rubout.  ESC Rubout
kills back to the start of the last word, and  C-X  Rubout  kills
back  to  the start of the last sentence.  C-X Rubout is particu-
larly useful when you are thinking of what to write as  you  type
it,  in case you change your mind about phrasing.  ESC Rubout and



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-21


C-X Rubout save the killed text for C-Y and ESC Y to retrieve.

ESC Rubout is often useful even when you have typed  only  a  few
characters wrong, if you know you are confused in your typing and
aren't sure what you typed.  At such a time, you  cannot  correct
with  Rubout except by looking at the screen to see what you did.
It requires less thought to kill the whole word  and  start  over
again, especially if the system is heavily loaded.

If you were typing a command  or  command  parameters,  C-G  will
abort the command with no further processing.

_8._9.  _T_r_a_n_s_p_o_s_i_t_i_o_n

The common error of transposing two characters can be fixed  with
the C-T (_t_r_a_n_s_p_o_s_e-_c_h_a_r_a_c_t_e_r_s) command.  Normally, C-T transposes
the two characters on either side of the  cursor  and  moves  the
cursor  forward  one  character.   Repeating  the command several
times "drags" a character to the right.  (Remember that _p_o_i_n_t  is
considered  to be between two characters, even though the visible
cursor in your terminal is on only one of them.)  When  given  at
the  end  of  a line, rather than switching the last character of
the line with the line separator, which  would  be  useless,  C-T
transposes the last two characters on the line.  So, if you catch
your transposition error right away, you can fix it with  just  a
C-T.   If  you  don't  catch it so fast, you must move the cursor
back to between the two characters.

To transpose two lines, use the C-X  C-T  (_t_r_a_n_s_p_o_s_e-_l_i_n_e_s)  com-
mand.   The line containing the cursor is exchanged with the line
above it; the cursor is left at the beginning of the line follow-
ing its original position.

_8._1_0.  _C_h_e_c_k_i_n_g _a_n_d _C_o_r_r_e_c_t_i_n_g _S_p_e_l_l_i_n_g

When you write a paper, you should correct its spelling  at  some
point  close  to  finishing it.  To correct the entire buffer, do
ESC X _s_p_e_l_l-_b_u_f_f_e_r.  This invokes the UNIX _s_p_e_l_l  program,  which
prints a list of all the misspelled words.  JOVE catches the list
and places it in a JOVE buffer called Spell.  You  are  given  an
opportunity  to  delete  from  that  buffer any words that aren't
really errors; then  JOVE  looks  up  each  misspelled  word  and
remembers  where  it  is in the buffer being corrected.  Then you
can go forward to each misspelled word with C-X C-N  (_n_e_x_t-_e_r_r_o_r)
and  backward  with  C-X  C-P  (_p_r_e_v_i_o_u_s-_e_r_r_o_r).  See the section
entitled _E_r_r_o_r _M_e_s_s_a_g_e _P_a_r_s_i_n_g.

_9.  _F_i_l_e _H_a_n_d_l_i_n_g

The basic unit of stored data is the file.   Each  program,  each
paper,  lives  usually  in  its  own  file.  To edit a program or
paper, the editor must be told the name of the file that contains
it.  This is called _v_i_s_i_t_i_n_g a file.  To make your changes to the
file permanent on disk, you must _s_a_v_e the file.



                           May 2, 1988





USD:17-22                              JOVE Manual for UNIX Users


_9._1.  _V_i_s_i_t_i_n_g _F_i_l_e_s


C-X C-V        Visit a file.

C-X C-R        Same as C-X C-V.

C-X C-S        Save the visited file.

ESC ~          Tell JOVE to  forget  that  the  buffer  has  been
               changed.


_V_i_s_i_t_i_n_g a file means copying its contents into  JOVE  where  you
can  edit them.  JOVE remembers the name of the file you visited.
Unless you use the multiple buffer feature of JOVE, you can  only
be visiting one file at a time.  The name of the current selected
buffer is visible in the mode line.

The changes you make with JOVE are made in a  copy  inside  JOVE.
The  file  itself  is  not changed.  The changed text is not per-
manent until you _s_a_v_e it in a file.  The first  time  you  change
the  text,  an asterisk appears at the end of the mode line; this
indicates that the text contains fresh changes which will be lost
unless you save them.

To visit a file, use the command C-X  C-V.   Follow  the  command
with  the  name  of  the  file you wish to visit, terminated by a
Return.  You can abort the command by typing  C-G,  or  edit  the
filename with many of the standard JOVE commands (e.g., C-A, C-E,
C-F, ESC F, ESC Rubout).  If the filename you wish  to  visit  is
similar  to the filename in the mode line (the default filename),
you can type C-R to insert the default and then edit it.  If  you
do  type  a  Return  to  finish  the command, the new file's text
appears on the screen, and its name appears in the mode line.  In
addition, its name becomes the new default filename.

If you wish to save the file and  make  your  changes  permanent,
type  C-X  C-S.   After  the save is finished, C-X C-S prints the
filename and the number of characters and lines that it wrote  to
the  file.   If  there are no changes to save (no asterisk at the
end of the mode line), the  file  is  not  saved;  otherwise  the
changes  saved  and the asterisk at the end of the mode line will
disappear.

What if you want to create a file?  Just visit it.   JOVE  prints
(_N_e_w  _f_i_l_e)  but aside from that behaves as if you had visited an
existing empty file.  If you make any changes and save them,  the
file is created.  If you visit a nonexistent file unintentionally
(because you typed the wrong filename), go ahead  and  visit  the
file  you  meant.  If you don't save the unwanted file, it is not
created.

If you alter one file and then visit another in the same  buffer,



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-23


JOVE offers to save the old one.  If you answer YES, the old file
is saved; if you answer NO, all the changes you have made  to  it
since  the last save are lost.  You should not type ahead after a
file visiting command, because your type-ahead  might  answer  an
unexpected question in a way that you would regret.

Sometimes you will change a buffer by accident.  Even if you undo
the  effect  of the change by editing, JOVE still knows that "the
buffer has been changed".  You can  tell  JOVE  to  pretend  that
there  have  been no changes with the ESC ~ command (_m_a_k_e-_b_u_f_f_e_r-
_u_n_m_o_d_i_f_i_e_d).  This command  simply  clears  the  "modified"  flag
which  says  that  the  buffer  contains changes which need to be
saved.  Even if the buffer really _i_s changed JOVE will still  act
as if it were not.

If JOVE is about to save a file and sees that  the  date  of  the
version on disk does not match what JOVE last read or wrote, JOVE
notifies you of this fact, and asks  what  to  do,  because  this
probably  means  that  something is wrong.  For example, somebody
else may have been editing the same file.  If this is  so,  there
is  a  good chance that your work or his work will be lost if you
don't take the proper steps.  You should first find  out  exactly
what  is going on.  If you determine that somebody else has modi-
fied the file, save your file under a different filename and then
DIFF  the  two  files  to  merge  the  two sets of changes.  (The
"patch" command is useful for applying  the  results  of  context
diffs directly).  Also get in touch with the other person so that
the files don't diverge any further.

_9._2.  _H_o_w _t_o _U_n_d_o _D_r_a_s_t_i_c _C_h_a_n_g_e_s _t_o _a _F_i_l_e

If you have made several extensive changes to  a  file  and  then
change  your mind about them, and you haven't yet saved them, you
can get rid of them by reading in the  previous  version  of  the
file.   You  can  do  this with the C-X C-V command, to visit the
unsaved version of the file.

_9._3.  _R_e_c_o_v_e_r_i_n_g _f_r_o_m _s_y_s_t_e_m/_e_d_i_t_o_r _c_r_a_s_h_e_s

JOVE does not have _A_u_t_o _S_a_v_e mode, but it does provide a  way  to
recover your work in the event of a system or editor crash.  JOVE
saves information about the files you're editing  every  so  many
changes  to  a  buffer  to make recovery possible.  Since a rela-
tively small amount of information is involved it's  hardly  even
noticeable  when  JOVE  does this.  The variable "sync-frequency"
says how often to save the necessary information, and the default
is  every 50 changes.  50 is a very reasonable number: if you are
writing a paper you will not lose more than the last  50  charac-
ters you typed, which is less than the average length of a line.

_9._4.  _M_i_s_c_e_l_l_a_n_e_o_u_s _F_i_l_e _O_p_e_r_a_t_i_o_n_s


ESC X _w_r_i_t_e-_f_i_l_e <file><return> writes the contents of the buffer



                           May 2, 1988





USD:17-24                              JOVE Manual for UNIX Users


into  the  file  <file>,  and  then  visits that file.  It can be
thought of as a way of "changing the name" of the  file  you  are
visiting.   Unlike  C-X  C-S, _w_r_i_t_e-_f_i_l_e saves even if the buffer
has not been changed.  C-X C-W is another  way  of  getting  this
command.

ESC X _i_n_s_e_r_t-_f_i_l_e <file><return> inserts the contents  of  <file>
into the buffer at point, leaving point unchanged before the con-
tents.  You can also use C-X C-I to get this command.

ESC X _w_r_i_t_e-_r_e_g_i_o_n <file><return> writes  the  region  (the  text
between  point  and mark) to the specified file.  It does not set
the visited filename.  The buffer is not changed.

ESC X _a_p_p_e_n_d-_r_e_g_i_o_n <file><return> appends the region to  <file>.
The text is added to the end of <file>.

_1_0.  _U_s_i_n_g _M_u_l_t_i_p_l_e _B_u_f_f_e_r_s

When we speak of "the buffer", which contains the  text  you  are
editing, we have given the impression that there is only one.  In
fact, there may be many of them, each with its own body of  text.
At  any  time  only  one buffer can be _s_e_l_e_c_t_e_d and available for
editing, but it isn't hard to switch to a  different  one.   Each
buffer  individually  remembers  which  file it is visiting, what
modes are in effect, and whether there are any changes that  need
saving.

C-X B          Select or create a buffer.

C-X C-F        Visit a file in its own buffer.

C-X C-B        List the existing buffers.

C-X K          Kill a buffer.

Each buffer in JOVE has a single  name,  which  normally  doesn't
change.   A  buffer's  name  can  be any length.  The name of the
currently selected buffer and the name of the file visited in  it
are  visible in the mode line when you are at top level.  A newly
started JOVE has only one buffer, named Main, unless  you  speci-
fied files to edit in the shell command that started JOVE.

_1_0._1.  _C_r_e_a_t_i_n_g _a_n_d _S_e_l_e_c_t_i_n_g _B_u_f_f_e_r_s

To create a new buffer, you need only think  of  a  name  for  it
(say,  FOO)  and  then do C-X B FOO<return>, which is the command
C-X B (_s_e_l_e_c_t-_b_u_f_f_e_r) followed by the name.  This  makes  a  new,
empty  buffer  (if  one by that name didn't previously exist) and
selects it for editing.  The new buffer is not visiting any file,
so  if  you  try to save it you will be asked for the filename to
use.  Each buffer has its own major mode; the new buffer's  major
mode is _T_e_x_t mode by default.




                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-25


To return to buffer FOO later after having switched  to  another,
the  same command C-X B FOO<return> is used, since C-X B can tell
whether a  buffer  named  FOO  exists  already  or  not.   C-X  B
Main<return>  reselects  the  buffer  Main  that JOVE started out
with.   Just  C-X  B<return>  reselects  the   previous   buffer.
Repeated  C-X  B<return>'s alternate between the last two buffers
selected.

You can also read a file into its own newly created  buffer,  all
with  one command: C-X C-F (_f_i_n_d-_f_i_l_e), followed by the filename.
The name of the buffer is the last element of  the  file's  path-
name.   C-F  stands  for  "Find",  because  if the specified file
already resides  in  a  buffer  in  your  JOVE,  that  buffer  is
reselected.   So  you  need not remember whether you have brought
the file in already or not.  A buffer created by C-X C-F  can  be
reselected  later  with C-X B or C-X C-F, whichever you find more
convenient.  Nonexistent files can be created with C-X  C-F  just
as they can with C-X C-V.

_1_0._2.  _U_s_i_n_g _E_x_i_s_t_i_n_g _B_u_f_f_e_r_s

To get a list of all the buffers that exist, do  C-X  C-B  (_l_i_s_t-
_b_u_f_f_e_r_s).   Each  buffer's  type,  name,  and visited filename is
printed.  An asterisk before the buffer name indicates  a  buffer
which  contains changes that have not been saved. The number that
appears at the beginning of a line in a C-X C-B listing  is  that
buffer's  _b_u_f_f_e_r  _n_u_m_b_e_r.   You can select a buffer by typing its
number in place of its  name.   If  a  buffer  with  that  number
doesn't  already  exist, a new buffer is created with that number
as its name.

If several buffers have modified text in them,  you  should  save
some of them with C-X C-M (_w_r_i_t_e-_m_o_d_i_f_i_e_d-_f_i_l_e_s).  This finds all
the buffers that need saving and then  saves  them.   Saving  the
buffers  this  way  is  much  easier and more efficient (but more
dangerous) than selecting each one and typing C-X  C-S.   If  you
give  C-X  C-M an argument, JOVE will ask for confirmation before
saving each buffer.

ESC X _r_e_n_a_m_e-_b_u_f_f_e_r <new name><return> changes the  name  of  the
currently selected buffer.

ESC X _e_r_a_s_e-_b_u_f_f_e_r <buffer name><return> erases the  contents  of
the <buffer name> without deleting the buffer entirely.

_1_0._3.  _K_i_l_l_i_n_g _B_u_f_f_e_r_s

After you use a JOVE for a while, it may  fill  up  with  buffers
which you no longer need.  Eventually you can reach a point where
trying to create any more results in an "out of memory"  or  "out
of  lines"  error.   When this happens you will want to kill some
buffers with the C-X K (_d_e_l_e_t_e-_b_u_f_f_e_r) command.  You can kill the
buffer  FOO  by  doing  C-X  K  FOO<return>.   If  you type C-X K
<return> JOVE will kill the previously selected buffer.   If  you



                           May 2, 1988





USD:17-26                              JOVE Manual for UNIX Users


try  to kill a buffer that needs saving JOVE will ask you to con-
firm it.

If you need to kill several buffers, use the  command  _k_i_l_l-_s_o_m_e-
_b_u_f_f_e_r_s.   This prompts you with the name of each buffer and asks
for confirmation before killing that buffer.

_1_1.  _C_o_n_t_r_o_l_l_i_n_g _t_h_e _D_i_s_p_l_a_y

Since only part of a large file will  fit  on  the  screen,  JOVE
tries  to  show  the  part that is likely to be interesting.  The
display control commands allow you to see a different part of the
file.

C-L            Reposition point at a specified vertical position,
               OR  clear  and redraw the screen with point in the
               same place.

C-V            Scroll forwards (a screen or a few lines).

ESC V          Scroll backwards.

C-Z            Scroll forward some lines.

ESC Z          Scroll backwards some lines.


The terminal screen is rarely large enough to display all of your
file.   If the whole buffer doesn't fit on the screen, JOVE shows
a contiguous portion of it, containing _p_o_i_n_t.   It  continues  to
show  approximately the same portion until point moves outside of
what is displayed; then  JOVE  chooses  a  new  portion  centered
around  the  new  _p_o_i_n_t.  This is JOVE's guess as to what you are
most interested in seeing, but if the guess is wrong, you can use
the  display  control  commands  to see a different portion.  The
available screen area through which  you  can  see  part  of  the
buffer  is  called  _t_h_e  _w_i_n_d_o_w,  and  the choice of where in the
buffer to start displaying is  also  called  _t_h_e  _w_i_n_d_o_w.   (When
there  is  only  one  window, it plus the mode line and the input
line take up the whole screen).

First we describe how JOVE chooses a new window position  on  its
own.   The  goal is usually to place _p_o_i_n_t half way down the win-
dow.  This is controlled by the variable _s_c_r_o_l_l-_s_t_e_p, whose value
is  the  number of lines above the bottom or below the top of the
window that the line containing point is placed.  A  value  of  0
(the initial value) means center _p_o_i_n_t in the window.

The basic display control command is  C-L  (_r_e_d_r_a_w-_d_i_s_p_l_a_y).   In
its  simplest  form,  with no argument, it tells JOVE to choose a
new window position, centering point half way  from  the  top  as
usual.

C-L with a positive argument chooses a new window so  as  to  put



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-27


point  that  many  lines  from the top.  An argument of zero puts
point on the very top line.  Point does not move with respect  to
the text; rather, the text and point move rigidly on the screen.

If point stays on the same line, the window is first cleared  and
then  redrawn.   Thus, two C-L's in a row are guaranteed to clear
the current window.  ESC C-L will clear  and  redraw  the  entire
screen.

The _s_c_r_o_l_l_i_n_g commands C-V, ESC V, C-Z, and ESC Z, let  you  move
the  whole  display up or down a few lines.  C-V (_n_e_x_t-_p_a_g_e) with
an argument shows you that many more lines at the bottom  of  the
screen,  moving the text and point up together as C-L might.  C-V
with a negative argument shows you more lines at the top  of  the
screen, as does ESC V (_p_r_e_v_i_o_u_s-_p_a_g_e) with a positive argument.

To read the buffer a window at a time, use the C-V  command  with
no  argument.  It takes the last line at the bottom of the window
and puts it at the top, followed by  nearly  a  whole  window  of
lines not visible before.  Point is put at the top of the window.
Thus, each C-V shows the "next page of text", except for one line
of  overlap  to  provide  context.   To  move backward, use ESC V
without an argument, which moves a whole window backwards  (again
with a line of overlap).

C-Z and ESC Z scroll one line  forward  and  one  line  backward,
respectively.   These are convenient for moving in units of lines
without having to type a numeric argument.

_1_1._1.  _M_u_l_t_i_p_l_e _W_i_n_d_o_w_s

JOVE allows you to split the screen into two or more _w_i_n_d_o_w_s  and
use  them to display parts of different files, or different parts
of the same file.

C-X 2          Divide the current window into two smaller ones.

C-X 1          Delete all windows but the current one.

C-X D          Delete current window.

C-X N          Switch to the next window.

C-X P          Switch to the previous window.

C-X O          Same as C-X P.

C-X ^          Make this window bigger.

ESC C-V        Scroll the other window.


When using _m_u_l_t_i_p_l_e _w_i_n_d_o_w mode, the text portion of  the  screen
is  divided into separate parts called _w_i_n_d_o_w_s, which can display



                           May 2, 1988





USD:17-28                              JOVE Manual for UNIX Users


different pieces of text.   Each  window  can  display  different
files,  or  parts  of  the same file.  Only one of the windows is
_a_c_t_i_v_e; that is the window which the cursor is in.  Editing  nor-
mally  takes place in that window alone.  To edit in another win-
dow, you would give a command to move the  cursor  to  the  other
window, and then edit there.

Each window displays a mode line for the buffer it's  displaying.
This  is  useful  to  keep track of which window corresponds with
which file.  In addition, the mode line  serves  as  a  separator
between  windows.   By  setting  the  variable  _m_o_d_e-_l_i_n_e-_s_h_o_u_l_d-
_s_t_a_n_d_o_u_t to "on" you can  have  JOVE  display  the  mode-line  in
reverse  video (assuming your particular terminal has the reverse
video capability).

The command C-X 2 (_s_p_l_i_t-_c_u_r_r_e_n_t-_w_i_n_d_o_w) enters  multiple  window
mode.   A  new mode line appears across the middle of the screen,
dividing the text display area into  two  halves.   Both  windows
contain  the  same  buffer  and  display the same position in it,
namely where point was at the time you issued the  command.   The
cursor moves to the second window.

To return to viewing only one  window,  use  the  command  C-X  1
(_d_e_l_e_t_e-_o_t_h_e_r-_w_i_n_d_o_w_s).   The  current window expands to fill the
whole screen, and the other windows disappear until the next  C-X
2.   (The buffers and their contents are unaffected by any of the
window operations).

While there is more than one window, you can  use  C-X  N  (_n_e_x_t-
_w_i_n_d_o_w) to switch to the next window, and C-X P (_p_r_e_v_i_o_u_s-_w_i_n_d_o_w)
to switch to the previous one.  If you are in the  bottom  window
and you type C-X N, you will be placed in the top window, and the
same kind of thing happens when you type C-X P in the top window,
namely  you  will  be  placed in the bottom window.  C-X O is the
same as C-X P.  It stands for "other window" because  when  there
are  only  two  windows, repeated use of this command will switch
between the two windows.

Often you will be editing one window while using the  other  just
for  reference.   Then, the command ESC C-V (_p_a_g_e-_n_e_x_t-_w_i_n_d_o_w) is
very useful.  It scrolls the next window, as if you  switched  to
the  next window, typed C-V, and switched back, without your hav-
ing to do all that.  With a negative argument, ESC C-V will do an
ESC V in the next window.

When a window splits, both  halves  are  approximately  the  same
size.   You can redistribute the screen space between the windows
with the C-X ^ (_g_r_o_w-_w_i_n_d_o_w) command.   It  makes  the  currently
selected  window  grow  one  line  bigger, or as many lines as is
specified with a numeric argument.  Use ESC  X  _s_h_r_i_n_k-_w_i_n_d_o_w  to
make the current window smaller.






                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-29


_1_1._2.  _M_u_l_t_i_p_l_e _W_i_n_d_o_w_s _a_n_d _M_u_l_t_i_p_l_e _B_u_f_f_e_r_s

Buffers can be selected independently in each window.  The C-X  B
command  selects  a  new  buffer in whichever window contains the
cursor.  Other windows' buffers do not change.

You can view the same buffer in more than one  window.   Although
the  same  buffer  appears  in  both windows, they have different
values of point, so you can move around in one window  while  the
other window continues to show the same text.  Then, having found
one place you wish to refer to, you can go back  into  the  other
window with C-X O or C-X P to make your changes.

If you have the same buffer in both windows, you must  beware  of
trying  to  visit a different file in one of the windows with C-X
C-V, because if you bring a new file into this  buffer,  it  will
replaced  the  old file in _b_o_t_h windows.  To view different files
in different windows, you must switch buffers in one of the  win-
dows first (with C-X B or C-X C-F, perhaps).

A convenient  "combination"  command  for  viewing  something  in
another window is C-X 4 (_w_i_n_d_o_w-_f_i_n_d).  With this command you can
ask to see any specified buffer, file or tag in the other window.
Follow  the  C-X  4  with  either  B  and  a buffer name, F and a
filename, or T and a tag name.  This switches to the other window
and  finds  there  what you specified.  If you were previously in
one-window mode, multiple-window mode is entered.   C-X  4  B  is
similar  to  C-X  2  C-X B.  C-X 4 F is similar to C-X 2 C-X C-F.
C-X 4 T is similar to C-X 2 C-X T.   The  difference  is  one  of
efficiency,  and  also  that  C-X 4 works equally well if you are
already using two windows.

_1_2.  _P_r_o_c_e_s_s_e_s _U_n_d_e_r _J_O_V_E

Another feature in JOVE is its ability to interact with UNIX in a
useful  way.  You can run other UNIX commands from JOVE and catch
their output in JOVE buffers.  In this chapter  we  will  discuss
the different ways to run and interact with UNIX commands.

_1_2._1.  _N_o_n-_i_n_t_e_r_a_c_t_i_v_e _U_N_I_X _c_o_m_m_a_n_d_s

To run a UNIX command from JOVE just type "C-X !" followed by the
name  of the command terminated with Return.  For example, to get
a list of all the users on the system, you do:

        C-X ! who<return>

Then JOVE picks a reasonable buffer in which the output from  the
command  will  be  placed.  E.g., "who" uses a buffer called who;
"ps alx" uses ps; and "fgrep -n foo *.c"  uses  fgrep.   If  JOVE
wants to use a buffer that already exists it first erases the old
contents.  If the buffer it selects holds a file, not output from
a  previous shell command, you must first delete that buffer with
C-X K.



                           May 2, 1988





USD:17-30                              JOVE Manual for UNIX Users


Once JOVE has picked a buffer it puts that buffer in a window  so
you  can  see the command's output as it is running.  If there is
only one window JOVE will automatically make another one.  Other-
wise,  JOVE  tries to pick the most convenient window which isn't
the current one.

It's not a good idea to type anything while the command  is  run-
ning.  There are two reasons for this:

(i)  JOVE won't see the  characters  (thus  won't  execute  them)
     until  the  command  finishes, so you may forget what you've
     typed.

(ii) Although JOVE won't know what you've  typed,  it  _w_i_l_l  know
     that  you've  typed  something,  and  then it will try to be
     "smart" and not update the display  until  it's  interpreted
     what  you've  typed.   But,  of course, JOVE won't interpret
     what you type until the UNIX command  completes,  so  you're
     left  with  the  uneasy  feeling you get when you don't know
     what the hell the computer is doing*.

If you want to interrupt the command for some reason (perhaps you
mistyped  it, or you changed your mind) you can type C-].  Typing
this inside JOVE while a process is running is the same as typing
C-C  when  you  are  outside  JOVE, namely the process stops in a
hurry.

When the command finishes, JOVE puts you back in  the  window  in
which  you  started.  Then it prints a message indicating whether
or not the command completed successfully in its (the  command's)
opinion.   That is, if the command had what it considers an error
(or you interrupt it with C-]) JOVE  will  print  an  appropriate
message.


_1_2._2.  _L_i_m_i_t_a_t_i_o_n_s _o_f _N_o_n-_I_n_t_e_r_a_c_t_i_v_e _P_r_o_c_e_s_s_e_s

The reason these are called non-interactive processes is that you
can't  type any input to them; you can't interact with them; they
can't ask you questions because  there  is  no  way  for  you  to
answer.   For  example,  you  can't  run a command interpreter (a
shell), or _m_a_i_l or _c_r_y_p_t with C-X ! because there is  no  way  to
provide  it  with  input.  Remember that JOVE (not the process in
the window) is listening to your keyboard, and JOVE  waits  until
the process dies before it looks at what you type.

C-X ! is useful for running commands that do some output and then
exit.   For  example, it's very useful to use with the C compiler
to catch compilation error messages (see Compiling  C  Programs),
or with the _g_r_e_p commands.
_________________________
*This is a bug and should be fixed, but probably  won't
be for a while.




                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-31


_1_2._3.  _I_n_t_e_r_a_c_t_i_v_e _P_r_o_c_e_s_s_e_s - _R_u_n _a _S_h_e_l_l _i_n _a _W_i_n_d_o_w

Some versions of JOVE|- have the capability of running interactive
processes.   This  is  more useful than non-interactive processes
for certain types of jobs:

(i)  You can go off and do some editing while the command is run-
     ning.   This  is useful for commands that do sporadic output
     and run for fairly long periods of time.

(ii) Unlike non-interactive processes,  you  can  type  input  to
     these.   In  addition,  you  can edit what you type with the
     power of all the JOVE commands _b_e_f_o_r_e you send the input  to
     the  process.   This  is  a really important feature, and is
     especially useful for running a shell in a window.

(iii)Because you can continue with normal editing  while  one  of
     the processes is running, you can create a bunch of contexts
     and manage them (select them, delete  them,  or  temporarily
     put them aside) with JOVE's window and buffer mechanisms.

Although we may have given an image of processes  being  attached
to  _w_i_n_d_o_w_s,  in  fact  they are attached to _b_u_f_f_e_r_s.  Therefore,
once an _i-_p_r_o_c_e_s_s is running you can select another  buffer  into
that window, or if you wish you can delete the window altogether.
If you reselect that buffer later it will be up  to  date.   That
is,  even though the buffer wasn't visible it was still receiving
output from the process.  You don't have to worry  about  missing
anything when the buffer isn't visible.

_1_2._4.  _A_d_v_a_n_t_a_g_e_s _o_f _R_u_n_n_i_n_g _P_r_o_c_e_s_s_e_s _i_n _J_O_V_E _W_i_n_d_o_w_s.

There are several advantages to running  a  shell  in  a  window.
What you type isn't seen immediately by the process; instead JOVE
waits until you type an entire line before passing it on  to  the
process to read.  This means that before you type <return> all of
JOVE's editing capabilities are available for  fixing  errors  on
your  input  line.   If you discover an error at the beginning of
the line, rather than erasing the whole line and  starting  over,
you  can simply move to the error, correct it, move back and con-
tinue typing.

Another feature is that you have the entire history of your  ses-
sion in a JOVE buffer.  You don't have to worry about output from
a command moving past the top of the screen.  If you missed  some
output  you  can  move  back through it with ESC V and other com-
mands.  In addition, you can save yourself retyping a command (or
a  similar  one) by sending edited versions of previous commands,
or edit the output of one command to become a list of commands to
be executed ("immediate shell scripts").

_________________________
|- For example, the version provided with 4.3BSD.




                           May 2, 1988





USD:17-32                              JOVE Manual for UNIX Users


_1_2._5.  _D_i_f_f_e_r_e_n_c_e_s _b_e_t_w_e_e_n _N_o_r_m_a_l _a_n_d _I-_p_r_o_c_e_s_s _B_u_f_f_e_r_s

JOVE behaves differently in several ways when you are  in  an  _i-
_p_r_o_c_e_s_s  buffer.   Most obviously, <return> does different things
depending on both your position in the buffer and on the state of
the process.  In the normal case, when point is at the end of the
buffer, Return  does  what  you'd  expect:  it  inserts  a  line-
separator  and  then  sends  the line to the process.  If you are
somewhere else in the buffer, possibly positioned at  a  previous
command  that  you want to edit, Return will place a copy of that
line (with the prompt discarded if there is one) at  the  end  of
the  buffer  and  move you there.  Then you can edit the line and
type Return as in the normal case.  If the process has  died  for
some reason, Return does nothing.  It doesn't even insert itself.
If that  happens  unexpectedly,  you  should  type  ESC  X  _l_i_s_t-
_p_r_o_c_e_s_s_e_s<return>  to  get  a list of each process and its state.
If your process died abnormally, _l_i_s_t-_p_r_o_c_e_s_s_e_s may help you fig-
ure out why.

_1_2._6.  _H_o_w _t_o _R_u_n _a _S_h_e_l_l _i_n _a _W_i_n_d_o_w

Type ESC X _s_h_e_l_l<return> to start up a shell.   As  with  C-X  !,
JOVE  will create a buffer, called *shell*-1, and select a window
for this new buffer.  But unlike C-X ! you will be  left  in  the
new  window.   Now,  the  shell process is said to be attached to
shell-1.

_1_3.  _D_i_r_e_c_t_o_r_y _H_a_n_d_l_i_n_g

To save having to use absolute pathnames when you want to edit  a
nearby  file  JOVE  allows you to move around the UNIX filesystem
just as the c-shell does.  These commands are:

cd dir         Change to the specified directory.

pushd [dir]    Like _c_d, but save the old directory on the  direc-
               tory  stack.   With  no directory argument, simply
               exchange the top two directories on the stack  and
               _c_d to the new top.

popd           Take the current directory off the stack and _c_d to
               the directory now at the top.

dirs           Display the contents of the directory stack.

The names and behavior of these commands  were  chosen  to  mimic
those in the c-shell.

_1_4.  _E_d_i_t_i_n_g _C _P_r_o_g_r_a_m_s

This section details the support provided by JOVE for working  on
C programs.





                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-33


_1_4._1.  _I_n_d_e_n_t_a_t_i_o_n _C_o_m_m_a_n_d_s

To save having to lay out C programs "by hand", JOVE has an  idea
of  the  correct  indentation of a line, based on the surrounding
context.  When you are in C Mode, JOVE treats  tabs  specially  -
typing  a tab at the beginning of a new line means "indent to the
right place".  Closing braces are also handled specially, and are
indented to match the corresponding open brace.

_1_4._2.  _P_a_r_e_n_t_h_e_s_i_s _a_n_d _B_r_a_c_e _M_a_t_c_h_i_n_g

To check that parentheses and braces match the way you think they
do, turn on _S_h_o_w _M_a_t_c_h mode (ESC X show-match-mode).  Then, when-
ever you type a close brace  or  parenthesis,  the  cursor  moves
momentarily  to  the  matching opener, if it's currently visible.
If it's not visible, JOVE displays the line containing the match-
ing opener on the message line.

_1_4._3.  _C _T_a_g_s

Often when you are editing a C program, especially someone else's
code, you see a function call and wonder what that function does.
You then search for the function within the current file  and  if
you're lucky find the definition, finally returning to the origi-
nal spot when you are done.  However, if are unlucky,  the  func-
tion  turns  out to be external (defined in another file) and you
have to suspend the edit, _g_r_e_p for the function name in every  .c
that might contain it, and finally visit the appropriate file.

To avoid this diversion or the need to remember which function is
defined  in  which  file,  Berkeley  UNIX  has  a  program called
_c_t_a_g_s(_1), which takes a set of source files and looks  for  func-
tion definitions, producing a file called _t_a_g_s as its output.

JOVE has a command called C-X T (_f_i_n_d-_t_a_g) that prompts  you  for
the name of a function (a _t_a_g), looks up the tag reference in the
previously constructed tags file, then visits the file containing
that tag in a new buffer, with point positioned at the definition
of the function.  There  is  another  version  of  this  command,
namely _f_i_n_d-_t_a_g-_a_t-_p_o_i_n_t, that uses the identifier at _p_o_i_n_t.

So, when you've added new functions to a module,  or  moved  some
old  ones  around,  run  the _c_t_a_g_s program to regenerate the _t_a_g_s
file.  JOVE looks in the file specified in the _t_a_g-_f_i_l_e variable.
The  default  is  "./tags",  that is, the tag file in the current
directory.  If you wish to use an alternate tag file, you use  C-
U C-X T, and JOVE will prompt for a file name.  If you find your-
self specifying the same file again and again, you can  set  _t_a_g-
_f_i_l_e to that file, and run _f_i_n_d-_t_a_g with no numeric argument.

To begin an editing session looking for a particular tag, use the
-_t  _t_a_g command line option to JOVE.  For example, say you wanted
to look at the file containing the tag _S_k_i_p_C_h_a_r, you would invoke
JOVE as:



                           May 2, 1988





USD:17-34                              JOVE Manual for UNIX Users



        % _j_o_v_e -_t _S_k_i_p_C_h_a_r


_1_4._4.  _C_o_m_p_i_l_i_n_g _Y_o_u_r _P_r_o_g_r_a_m

You've typed in a program or altered an existing one and now  you
want to run it through the compiler to check for errors.  To save
having to suspend the edit, run the compiler, scribble down error
messages,  and  then  resume the edit, JOVE allows you to compile
your code while in the editor.  This is done  with  the  C-X  C-E
(_c_o_m_p_i_l_e-_i_t)  command.  If you run _c_o_m_p_i_l_e-_i_t with no argument it
runs the UNIX _m_a_k_e program into a buffer; If you need  a  special
command  or  want  to pass arguments to _m_a_k_e, run _c_o_m_p_i_l_e-_i_t with
any argument (C-U is good enough) and you will  be  prompted  for
the command to execute.

If any error messages are produced, they are treated specially by
JOVE.  That treatment is the subject of the next section.

_1_4._5.  _E_r_r_o_r _M_e_s_s_a_g_e _P_a_r_s_i_n_g _a_n_d _S_p_e_l_l_i_n_g _C_h_e_c_k_i_n_g

JOVE knows how to interpret the error  messages  from  many  UNIX
commands;  In particular, the messages from _c_c, _g_r_e_p and _l_i_n_t can
be understood.  After running the _c_o_m_p_i_l_e-_i_t command, the  _p_a_r_s_e-
_e_r_r_o_r_s  command  is  automatically executed, and any errors found
are displayed in a new buffer.  The files whose names  are  found
in  parsing the error messages are each brought into JOVE buffers
and the point is positioned at the first error in the first file.
The  commands  _c_u_r_r_e_n_t-_e_r_r_o_r,  C-X  C-N (_n_e_x_t-_e_r_r_o_r), and C-X C-P
(_p_r_e_v_i_o_u_s-_e_r_r_o_r) can be used to traverse the list of errors.

If you already have a file called _e_r_r_s containing,  say,  c  com-
piler messages then you can get JOVE to interpret the messages by
invoking it as:

        % _j_o_v_e -_p _e_r_r_s


JOVE has a special mechanism for checking the the spelling  of  a
document; It runs the UNIX spell program into a buffer.  You then
delete from this buffer all those words  that  are  not  spelling
errors  and  then  JOVE runs the _p_a_r_s_e-_s_p_e_l_l_i_n_g-_e_r_r_o_r_s command to
yield a list of errors just as in the last section.

_1_5.  _S_i_m_p_l_e _C_u_s_t_o_m_i_z_a_t_i_o_n


_1_5._1.  _M_a_j_o_r _M_o_d_e_s

To help with editing particular types of file, say a paper or a C
program, JOVE has several _m_a_j_o_r _m_o_d_e_s.  These are as follows:





                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-35


_1_5._1._1.  _T_e_x_t _m_o_d_e

This is the default major mode.  Nothing special is done.

_1_5._1._2.  _C _m_o_d_e

This mode affects the behavior of the tab and parentheses charac-
ters.   Instead  of just inserting the tab, JOVE determines where
the text "ought" to line up for the C language and tabs  to  that
position  instead.   The  same thing happens with the close brace
and close parenthesis; they are tabbed to the "right"  place  and
then  inserted.   Using the _a_u_t_o-_e_x_e_c_u_t_e-_c_o_m_m_a_n_d command, you can
make JOVE enter _C _M_o_d_e whenever you edit a file whose  name  ends
in ._c.

_1_5._1._3.  _L_i_s_p _m_o_d_e

This mode is analogous to _C _M_o_d_e, but  performs  the  indentation
needed  to  lay out Lisp programs properly.  Note also the _g_r_i_n_d-
_s-_e_x_p_r command that prettyprints an _s-_e_x_p_r_e_s_s_i_o_n  and  the  _k_i_l_l-
_m_o_d_e-_e_x_p_r_e_s_s_i_o_n command.

_1_5._2.  _M_i_n_o_r _M_o_d_e_s

In addition to the major modes, JOVE has a set  of  minor  modes.
These are as follows:

_1_5._2._1.  _A_u_t_o _I_n_d_e_n_t

In this mode, JOVE indents each line the same way as  that  above
it.   That  is,  the Return key in this mode acts as the Linefeed
key ordinarily does.

_1_5._2._2.  _S_h_o_w _M_a_t_c_h

Move the cursor momentarily to the matching  opening  parenthesis
when a closing parenthesis is typed.

_1_5._2._3.  _A_u_t_o _F_i_l_l

In _A_u_t_o _F_i_l_l mode, a newline is automatically inserted  when  the
line  length  exceeds the right margin.  This way, you can type a
whole paper without having to use the Return key.

_1_5._2._4.  _O_v_e_r _W_r_i_t_e

In this mode, any text typed in will replace  the  previous  con-
tents.   (The  default  is for new text to be inserted and "push"
the old along.) This is useful for editing  an  already-formatted
diagram  in  which  you want to change some things without moving
other things around on the screen.






                           May 2, 1988





USD:17-36                              JOVE Manual for UNIX Users


_1_5._2._5.  _W_o_r_d _A_b_b_r_e_v

In this mode, every word you type is compared to a list  of  word
abbreviations;  whenever you type an abbreviation, it is replaced
by the text that it abbreviates.  This can save typing if a  par-
ticular word or phrase must be entered many times.  The abbrevia-
tions and their expansions are held in a file that looks like:

        abbrev:phrase

This file can be set up in your  ~/._j_o_v_e_r_c  with  the  _r_e_a_d-_w_o_r_d-
_a_b_b_r_e_v-_f_i_l_e  command.  Then, whenever you are editing a buffer in
_W_o_r_d _A_b_b_r_e_v mode, JOVE checks for the abbreviations you've given.
See  also  the commands _r_e_a_d-_w_o_r_d-_a_b_b_r_e_v-_f_i_l_e, _w_r_i_t_e-_w_o_r_d-_a_b_b_r_e_v-
_f_i_l_e, _e_d_i_t-_w_o_r_d-_a_b_b_r_e_v_s, _d_e_f_i_n_e-_g_l_o_b_a_l-_w_o_r_d-_a_b_b_r_e_v,  _d_e_f_i_n_e-_m_o_d_e-
_w_o_r_d-_a_b_b_r_e_v,  and  _b_i_n_d-_m_a_c_r_o-_t_o-_w_o_r_d-_a_b_b_r_e_v,  and  the  variable
_a_u_t_o-_c_a_s_e-_a_b_b_r_e_v.

_1_5._3.  _V_a_r_i_a_b_l_e_s

JOVE can be tailored to suit your needs by changing the values of
variables.   A  JOVE  variable  can be given a value with the _s_e_t
command, and its value displayed with the _p_r_i_n_t command.

The variables JOVE understands are listed along with the commands
in the alphabetical list at the end of this document.

_1_5._4.  _K_e_y _R_e-_b_i_n_d_i_n_g

Many of the commands built into JOVE are not  bound  to  specific
keys.   The  command handler in JOVE is used to invoke these com-
mands and is activated by  the  _e_x_e_c_u_t_e-_e_x_t_e_n_d_e_d-_c_o_m_m_a_n_d  command
(ESC  X).   When  the  name of a command typed in is unambiguous,
that command will be executed.  Since it is very slow to have  to
type  in  the  name of each command every time it is needed, JOVE
makes it possible to _b_i_n_d commands to keys.  When  a  command  is
_b_o_u_n_d  to a key any future hits on that key will invoke that com-
mand.  All the printing characters are  initially  bound  to  the
command  _s_e_l_f-_i_n_s_e_r_t.  Thus, typing any printing character causes
it to be inserted into the text.  Any of  the  existing  commands
can  be bound to any key.  (A _k_e_y may actually be a _c_o_n_t_r_o_l _c_h_a_r_-
_a_c_t_e_r or an _e_s_c_a_p_e _s_e_q_u_e_n_c_e as explained previously under _C_o_m_m_a_n_d
_I_n_p_u_t _C_o_n_v_e_n_t_i_o_n_s).

Since there are more commands than there are keys, two  keys  are
treated  as _p_r_e_f_i_x commands.  When a key bound to one of the pre-
fix commands is typed, the next character typed is interpreted on
the  basis  that it was preceded by one of the prefix keys.  Ini-
tially ^X and ESC are the prefix keys and many of  the  built  in
commands  are  initially  bound to these "two stroke" keys.  (For
historical reasons, the  Escape  key  is  often  referred  to  as
"Meta").





                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-37


_1_5._5.  _K_e_y_b_o_a_r_d _M_a_c_r_o_s

Although JOVE has many powerful commands, you often find that you
have  a  task that no individual command can do.  JOVE allows you
to define your own commands from sequences of existing  ones  "by
example"; Such a sequence is termed a _m_a_c_r_o.  The procedure is as
follows: First you type the  _s_t_a_r_t-_r_e_m_e_m_b_e_r_i_n_g  command,  usually
bound  to  C-X  (.  Next you "perform" the commands which as they
are being executed are also remembered, which will constitute the
body  of  the macro.  Then you give the _s_t_o_p-_r_e_m_e_m_b_e_r_i_n_g command,
usually bound to C-X ).  You now have a _k_e_y_b_o_a_r_d _m_a_c_r_o.   To  run
this  command  sequence  again, use the command _e_x_e_c_u_t_e-_k_e_y_b_o_a_r_d-
_m_a_c_r_o, usually bound to C-X E.  You may find this  bothersome  to
type  and  re-type, so there is a way to bind the macro to a key.
First, you must give the keyboard macro a name  using  the  _n_a_m_e-
_k_e_y_b_o_a_r_d-_m_a_c_r_o  command.  Then the binding is made with the _b_i_n_d-
_m_a_c_r_o-_t_o-_k_e_y command.  We're still not finished because all  this
hard work will be lost if you leave JOVE.  What you do is to save
your macros into a file with  the  _w_r_i_t_e-_m_a_c_r_o_s-_t_o-_f_i_l_e  command.
To  retrieve  your  macros  in  the next editing session (but not
their bindings), you can simply execute  the  _s_o_u_r_c_e  command  on
that file.

_1_5._6.  _I_n_i_t_i_a_l_i_z_a_t_i_o_n _F_i_l_e_s

Users will likely want to modify  the  default  key  bindings  to
their liking.  Since it would be quite annoying to have to set up
the bindings each time JOVE is started up, JOVE has  the  ability
to  read in a "startup" file.  Whenever JOVE is started, it reads
commands from the file ._j_o_v_e_r_c  in  the  user's  home  directory.
These  commands  are  read  as  if they were typed to the command
handler (ESC X) during an edit.  There can be  only  one  command
per   line   in   the   startup   file.    If  there  is  a  file
/_u_s_r/_l_i_b/_j_o_v_e/_j_o_v_e_r_c, then this file  will  be  read  before  the
user's  ._j_o_v_e_r_c  file.   This can be used to set up a system-wide
default startup mode for JOVE that is tailored to  the  needs  of
that system.

The _s_o_u_r_c_e command can be used to read commands from a  specified
file  at any time during an editing session, even from inside the
._j_o_v_e_r_c file.  This means that a macro can be used to change  the
key  bindings, e.g., to enter a mode, by reading from a specified
file which contains all the necessary bindings.














                           May 2, 1988





USD:17-38                              JOVE Manual for UNIX Users


_1_6.  _A_l_p_h_a_b_e_t_i_c_a_l _L_i_s_t _o_f _C_o_m_m_a_n_d_s _a_n_d _V_a_r_i_a_b_l_e_s

_1_6._1.  _p_r_e_f_i_x-_1 (_E_s_c_a_p_e)

This reads the next character and runs a  command  based  on  the
character typed.  If you wait for more than a second or so before
typing the next character, the message "ESC" will be  printed  on
the  message  line to remind you that JOVE is waiting for another
character.

_1_6._2.  _p_r_e_f_i_x-_2 (_C-_X)

This reads the next character and runs a  command  based  on  the
character typed.  If you wait for more than a second or so before
typing another character, the message "C-X" will  be  printed  on
the  message  line to remind you that JOVE is waiting for another
character.

_1_6._3.  _p_r_e_f_i_x-_3 (_N_o_t _B_o_u_n_d)

This reads the next character and runs a  command  based  on  the
character typed.  If you wait for more than a second or so before
typing the next character, the character  that  invoked  Prefix-3
will  be  printed  on the message line to remind you that JOVE is
waiting for another one.

_1_6._4.  _a_b_o_r_t-_c_h_a_r (_v_a_r_i_a_b_l_e)

This variable defines JOVE'S  abort  characer.   When  the  abort
character  is  typed,  the  current JOVE command is aborted.  The
default value is C-G.

_1_6._5.  _a_d_d-_l_i_s_p-_s_p_e_c_i_a_l (_N_o_t _B_o_u_n_d)

This command is to tell JOVE  what  identifiers  require  special
indentation  in lisp mode.  Lisp functions like defun and let are
two of the default functions that get treated specially.  This is
just  a  kludge  to  define some of your own.  It prompts for the
function name.

_1_6._6.  _a_l_l_o_w-^_S-_a_n_d-^_Q (_v_a_r_i_a_b_l_e)

This variable, when set, tells JOVE that your terminal  does  not
need to use the characters C-S and C-Q for flow control, and that
it is okay to bind things to them.  This variable should  be  set
depending upon what kind of terminal you have.

_1_6._7.  _a_l_l_o_w-_b_a_d-_f_i_l_e_n_a_m_e_s (_v_a_r_i_a_b_l_e)

If set, this variable permits filenames to contain "bad"  charac-
ters  such  as  those  from  the set *&%!"`[]{}.  These files are
harder to deal with, because the characters mean something to the
shell.  The default value is "off".




                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-39


_1_6._8.  _a_n_s_i-_c_o_d_e_s (_N_o_t _B_o_u_n_d)

When bound to "ESC [" this makes  the  arrow  keys,  and  various
other keys on vt100-like terminals do the right thing.  For exam-
ple, the up arrow key will move to the previous line.

_1_6._9.  _a_p_p_e_n_d-_r_e_g_i_o_n (_N_o_t _B_o_u_n_d)

This appends the region to a specified file.  If  the  file  does
not already exist it is created.

_1_6._1_0.  _a_p_r_o_p_o_s (_N_o_t _B_o_u_n_d)

This types out all the commands, variables and  macros  with  the
specific keyword in their names.  For each command and macro that
contains the string, the key sequence that can be used to execute
the  command  or  macro  is  printed; with variables, the current
value is printed.  So, to find all the commands that are  related
to windows, you type

        ESC X apropos window<Return>


_1_6._1_1.  _a_u_t_o-_c_a_s_e-_a_b_b_r_e_v (_v_a_r_i_a_b_l_e)

When this variable is on (the default),  word  abbreviations  are
adjusted for case automatically.  For example, if "jove" were the
abbreviation for "jonathan's own version of emacs",  then  typing
"jove"  would  give you "jonathan's own version of emacs", typing
"Jove" would give you "Jonathan's own version of emacs", and typ-
ing  "JOVE"  would  give  you  "Jonathan's Own Version of Emacs".
When this variable is  "off",  upper  and  lower  case  are  dis-
tinguished  when looking for the abbreviation, i.e., in the exam-
ple above, "JOVE" and "Jove" would not be  expanded  unless  they
were defined separately.

_1_6._1_2.  _a_u_t_o-_e_x_e_c_u_t_e-_c_o_m_m_a_n_d (_N_o_t _B_o_u_n_d)

This tells JOVE to execute a command automatically  when  a  file
whose  name  matches  a  specified pattern is visited.  The first
argument is the command you want executed and  the  second  is  a
regular  expression  pattern that specifies the files that apply.
For example, if you want to be in show-match-mode when you edit C
source  files (that is, files that end with ".c" or ".h") you can
type

        ESC X auto-execute-command show-match-mode .*.[ch]$


_1_6._1_3.  _a_u_t_o-_e_x_e_c_u_t_e-_m_a_c_r_o (_N_o_t _B_o_u_n_d)

This is like _a_u_t_o-_e_x_e_c_u_t_e-_c_o_m_m_a_n_d except you use  it  to  execute
macros automatically instead of built-in commands.




                           May 2, 1988





USD:17-40                              JOVE Manual for UNIX Users


_1_6._1_4.  _a_u_t_o-_f_i_l_l-_m_o_d_e (_N_o_t _B_o_u_n_d)

This turns on Auto Fill mode (or off if it's currently on) in the
selected buffer.  When JOVE is in Auto Fill mode it automatically
breaks lines for you when you reach the right margin so you don't
have to remember to hit Return.  JOVE uses 78 as the right margin
but you can change that by setting the variable  _r_i_g_h_t-_m_a_r_g_i_n  to
another value.  See the _s_e_t command to learn how to do this.

_1_6._1_5.  _a_u_t_o-_i_n_d_e_n_t-_m_o_d_e (_N_o_t _B_o_u_n_d)

This turns on Auto Indent mode (or off if it's currently  on)  in
the  selected  buffer.   When JOVE is in Auto Indent mode, Return
indents the new line to the same position as the  line  you  were
just  on.   This  is  useful  for  lining up C code (or any other
language (but what else is there besides C?)).  This  is  out  of
date  because of the new command called _n_e_w_l_i_n_e-_a_n_d-_i_n_d_e_n_t but it
remains because  of  several  "requests"  on  the  part  of,  uh,
enthusiastic and excitable users, that it be left as it is.

_1_6._1_6.  _b_a_c_k_g_r_o_u_n_d-_c_o_l_o_r (_v_a_r_i_a_b_l_e)

This specifies the background color of  the  screen  (PC  version
only).  The default value is 0, which stands for black.

_1_6._1_7.  _b_a_c_k_w_a_r_d-_c_h_a_r_a_c_t_e_r (_C-_B)

This moves point backward over a single character.  If  point  is
at  the beginning of the line it moves to the end of the previous
line.

_1_6._1_8.  _b_a_c_k_w_a_r_d-_l_i_s_t (_E_S_C _C-_P)

This moves backward over a list as opposed  to  an  s-expression.
The  difference  between  this  and _b_a_c_k_w_a_r_d-_s-_e_x_p_r_e_s_s_i_o_n is that
this first searchs for a ")" and then moves to the matching  "(".
This  is  useful when you're trying to find unmatched parens in a
program.

_1_6._1_9.  _b_a_c_k_w_a_r_d-_p_a_r_a_g_r_a_p_h (_E_S_C [)

This moves point backward to the beginning of the current or pre-
vious paragraph.  Paragraphs are bounded by lines that begin with
a Period or Tab, or by blank lines; a change in  indentation  may
also  signal  a break between paragraphs, except that JOVE allows
the first line of a paragraph to be indented differently from the
other lines.

_1_6._2_0.  _b_a_c_k_w_a_r_d-_s-_e_x_p_r_e_s_s_i_o_n (_E_S_C _C-_B)

This moves point backward over a s-expression.  It is  just  like
_f_o_r_w_a_r_d-_s-_e_x_p_r_e_s_s_i_o_n with a negative argument.





                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-41


_1_6._2_1.  _b_a_c_k_w_a_r_d-_s_e_n_t_e_n_c_e (_E_S_C _A)

This moves point backward to the beginning of the current or pre-
vious  sentence.   JOVE considers the end of a sentence to be the
characters ".", "!" or "?" followed by a Return or by one or more
spaces.

_1_6._2_2.  _b_a_c_k_w_a_r_d-_u_p-_l_i_s_t (_E_S_C _C-_U)

This is similar to _b_a_c_k_w_a_r_d-_s-_e_x_p_r_e_s_s_i_o_n except it backs  up  and
OUT  of  the  enclosing  s-expression.   In other words, it moves
backward to the "(" that would match a ")" if you were to type it
right then.

_1_6._2_3.  _b_a_c_k_w_a_r_d-_w_o_r_d (_E_S_C _B)

This moves point backward to the beginning of the current or pre-
vious word.

_1_6._2_4.  _b_a_d-_f_i_l_e_n_a_m_e-_e_x_t_e_n_s_i_o_n_s (_v_a_r_i_a_b_l_e)

This contains a list of words separated by spaces which are to be
considered bad filename extensions, and so will not be counted in
filename completion.  The default is ".o" so if you  have  jove.c
and  jove.o  in  the same directory, the filename completion will
not complain of an ambiguity because it will ignore jove.o.

_1_6._2_5.  _b_e_g_i_n-_k_b_d-_m_a_c_r_o (_C-_X ()

This starts defining the keyboard macro by remembering  all  your
key  strokes  until you execute _e_n_d-_k_b_d-_m_a_c_r_o, by typing "C-X )".
Because of a bug in JOVE you shouldn't  terminate  the  macro  by
typing "ESC X end-kbd-macro"; _e_n_d-_k_b_d-_m_a_c_r_o must be bound to "C-X
)" in order to make things work correctly.  To execute the remem-
bered  key  strokes  you type "C-X E" which runs the _e_x_e_c_u_t_e-_k_b_d-
_m_a_c_r_o command.  Sometimes you may want a  macro  to  accept  dif-
ferent  input  each time it runs.  To see how to do this, see the
_m_a_k_e-_m_a_c_r_o-_i_n_t_e_r_a_c_t_i_v_e command.

_1_6._2_6.  _b_e_g_i_n_n_i_n_g-_o_f-_f_i_l_e (_E_S_C <)

This moves point backward to the beginning of the  buffer.   This
sometimes  prints  the "Point Pushed" message.  If the top of the
buffer isn't on the screen JOVE will set the mark so you  can  go
back to where you were if you want.

_1_6._2_7.  _b_e_g_i_n_n_i_n_g-_o_f-_l_i_n_e (_C-_A)

This moves point to the beginning of the current line.

_1_6._2_8.  _b_e_g_i_n_n_i_n_g-_o_f-_w_i_n_d_o_w (_E_S_C ,)

This moves point to the beginning of  the  current  window.   The
sequence  "ESC  ,"  is  the  same  as "ESC <" (beginning of file)



                           May 2, 1988





USD:17-42                              JOVE Manual for UNIX Users


except without the shift key on the "<", and can thus can  easily
be remembered.

_1_6._2_9.  _b_i_n_d-_m_a_c_r_o-_t_o-_k_e_y (_N_o_t _B_o_u_n_d)

This is like _b_i_n_d-_t_o-_k_e_y except you use  it  to  attach  keys  to
named macros.

_1_6._3_0.  _b_i_n_d-_m_a_c_r_o-_t_o-_w_o_r_d-_a_b_b_r_e_v (_N_o_t _B_o_u_n_d)

This command allows you to bind a macro to a  previously  defined
word  abbreviation.   Whenever you type the abbreviation, it will
first be expanded as an abbreviation, and then the macro will  be
executed.   Note  that  if the macro moves around, you should set
the mark first (C-@) and then exchange the point  and  mark  last
(C-X C-X).

_1_6._3_1.  _b_i_n_d-_t_o-_k_e_y (_N_o_t _B_o_u_n_d)

This attaches a key to an internal JOVE command  so  that  future
hits on that key invoke that command.  For example, to make "C-W"
erase the previous  word,  you  type  "ESC  X  bind-to-key  kill-
previous-word C-W".

_1_6._3_2.  _b_u_f_f_e_r-_p_o_s_i_t_i_o_n (_N_o_t _B_o_u_n_d)

This displays the current file name, current line  number,  total
number  of lines, percentage of the way through the file, and the
position of the cursor in the current line.

_1_6._3_3.  _c-_i_n_d_e_n_t_a_t_i_o_n-_i_n_c_r_e_m_e_n_t (_v_a_r_i_a_b_l_e)

This variable is not currently used.

_1_6._3_4.  _c-_m_o_d_e (_N_o_t _B_o_u_n_d)

This turns on C mode in the currently selected buffer.   This  is
one  of  currently four possible major modes:  Fundamental, Text,
C, Lisp.  When in C or Lisp mode, Tab, "}", and ")" behave a lit-
tle  differently  from  usual:  They  are indented to the "right"
place for C (or Lisp) programs.  In JOVE, the  "right"  place  is
simply the way the author likes it (but I've got good taste).

_1_6._3_5.  _c_a_s_e-_c_h_a_r_a_c_t_e_r-_c_a_p_i_t_a_l_i_z_e (_N_o_t _B_o_u_n_d)

This capitalizes the character after point, i.e.,  the  character
under  the  cursor.  If a negative argument is supplied that many
characters _b_e_f_o_r_e point are upper cased.

_1_6._3_6.  _c_a_s_e-_i_g_n_o_r_e-_s_e_a_r_c_h (_v_a_r_i_a_b_l_e)

This variable, when set, tells JOVE to treat upper and lower case
as  the same when searching.  Thus "jove" and "JOVE" would match,
and "JoVe"  would  match  either.   The  default  value  of  this



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-43


variable is "off".

_1_6._3_7.  _c_a_s_e-_r_e_g_i_o_n-_l_o_w_e_r (_N_o_t _B_o_u_n_d)

This changes all the upper case letters in the  region  to  their
lower case equivalent.

_1_6._3_8.  _c_a_s_e-_r_e_g_i_o_n-_u_p_p_e_r (_N_o_t _B_o_u_n_d)

This changes all the lower case letters in the  region  to  their
upper case equivalent.

_1_6._3_9.  _c_a_s_e-_w_o_r_d-_c_a_p_i_t_a_l_i_z_e (_E_S_C _C)

This capitalizes the current word by making  the  current  letter
upper  case and making the rest of the word lower case.  Point is
moved to the end of the word.  If point is not  positioned  on  a
word it is first moved forward to the beginning of the next word.
If a negative argument is supplied that many words  _b_e_f_o_r_e  point
are  capitalized.   This  is  useful for correcting the word just
typed without having to move point to the beginning of  the  word
yourself.

_1_6._4_0.  _c_a_s_e-_w_o_r_d-_l_o_w_e_r (_E_S_C _L)

This lower-cases the current word and leaves point at the end  of
it.   If point is in the middle of a word the rest of the word is
converted.  If point is not in a word it is first  moved  forward
to  the  beginning  of  the next word.  If a negative argument is
supplied that many words _b_e_f_o_r_e  point  are  converted  to  lower
case.   This is useful for correcting the word just typed without
having to move point to the beginning of the word yourself.

_1_6._4_1.  _c_a_s_e-_w_o_r_d-_u_p_p_e_r (_E_S_C _U)

This upper-cases the current word and leaves point at the end  of
it.   If point is in the middle of a word the rest of the word is
converted.  If point is not in a word it is first  moved  forward
to  the  beginning  of  the next word.  If a negative argument is
supplied that many words _b_e_f_o_r_e  point  are  converted  to  upper
case.   This is useful for correcting the word just typed without
having to move point to the beginning of the word yourself.

_1_6._4_2.  _c_d (_N_o_t _B_o_u_n_d)

This changes the current directory.

_1_6._4_3.  _c_h_a_r_a_c_t_e_r-_t_o-_o_c_t_a_l-_i_n_s_e_r_t (_N_o_t _B_o_u_n_d)

This inserts a Back-slash followed by the ascii value of the next
character typed.  For example, "C-G" inserts the string "\007".






                           May 2, 1988





USD:17-44                              JOVE Manual for UNIX Users


_1_6._4_4.  _c_l_e_a_r-_a_n_d-_r_e_d_r_a_w (_E_S_C _C-_L)

This clears the entire screen and redraws all the  windows.   Use
this  when JOVE gets confused about what's on the screen, or when
the screen gets filled with garbage  characters  or  output  from
another program.

_1_6._4_5.  _c_o_m_m_e_n_t-_f_o_r_m_a_t (_v_a_r_i_a_b_l_e)

This variable tells JOVE how to format your comments when you run
the command _f_i_l_l-_c_o_m_m_e_n_t.  Its format is this:

        <open pattern>%!<line header>%c<line trailer>%!<close pattern>

The %!, %c, and %! must appear in the format; everything else  is
optional.   A  newline (represented by %n) may appear in the open
or close patterns.  %% is the representation for %.  The  default
comment format is for C comments.  See _f_i_l_l-_c_o_m_m_e_n_t for more.

_1_6._4_6.  _c_o_m_p_i_l_e-_i_t (_C-_X _C-_E)

This compiles your program by running  the  UNIX  command  "make"
into  a buffer, and automatically parsing the error messages that
are created (if any).  See the _p_a_r_s_e-_e_r_r_o_r_s command.  To  compile
a  C  program  without  "make",  use  "C-U C-X C-E" and JOVE will
prompt for a command to run instead of make.  (And then the  com-
mand you type will become the default command.)  You can use this
to parse the output from the C compiler or the "grep"  or  "lint"
programs.   See  also  _e_r_r_o_r-_f_o_r_m_a_t-_s_t_r_i_n_g to make it possible to
parse errors of a different format.

_1_6._4_7.  _c_o_n_t_i_n_u_e-_p_r_o_c_e_s_s (_N_o_t _B_o_u_n_d)

This sends SIGCONT to the current  interactive  process,  _i_f  the
process is currently stopped.

_1_6._4_8.  _c_o_p_y-_r_e_g_i_o_n (_E_S_C _W)

This takes all the text in the region and copies it onto the kill
ring  buffer.   This is just like running _k_i_l_l-_r_e_g_i_o_n followed by
the _y_a_n_k command.  See the _k_i_l_l-_r_e_g_i_o_n and _y_a_n_k commands.

_1_6._4_9.  _c_u_r_r_e_n_t-_e_r_r_o_r (_N_o_t _B_o_u_n_d)

This moves to the current error in the  list  of  parsed  errors.
See  the _n_e_x_t-_e_r_r_o_r and _p_r_e_v_i_o_u_s-_e_r_r_o_r commands for more detailed
information.

_1_6._5_0.  _d_a_t_e (_N_o_t _B_o_u_n_d)

This prints the date on the message line.






                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-45


_1_6._5_1.  _d_e_f_i_n_e-_g_l_o_b_a_l-_w_o_r_d-_a_b_b_r_e_v (_N_o_t _B_o_u_n_d)

This defines a global abbreviation.

_1_6._5_2.  _d_e_f_i_n_e-_m_a_c_r_o (_N_o_t _B_o_u_n_d)

This provides a different mechanism for defining keyboard macros.
Instead  of  gathering  keystrokes  and  storing  them  into  the
"keyboard-macro" (which is how  _s_t_a_r_t-_k_b_d-_m_a_c_r_o  works),  _d_e_f_i_n_e-
_m_a_c_r_o  prompts  for  a macro name (terminated with Space, or New-
line) and then for the actual macro body.  If you wish to specify
control  characters  in  the  macro,  you  may simply insert them
(using the _q_u_o_t_e_d-_i_n_s_e_r_t command) or by inserting  the  character
'^'  followed by the appropriate letter for that character (e.g.,
^A would be the two characters '^' followed by 'A').  You may use
Back-slash to prevent the '^' from being interpreted as part of a
control character when you really wish to  insert  one  (e.g.,  a
macro  body  "\^foo"  would  insert  the  string  "^foo" into the
buffer, whereas the body "^foo" would be the same  as  typing  ^F
and then inserting the string "oo").  See _w_r_i_t_e-_m_a_c_r_o_s-_t_o-_f_i_l_e to
see how to save macros.

_1_6._5_3.  _d_e_f_i_n_e-_m_o_d_e-_w_o_r_d-_a_b_b_r_e_v (_N_o_t _B_o_u_n_d)

This defines a mode-specific abbreviation.

_1_6._5_4.  _d_e_l_e_t_e-_b_l_a_n_k-_l_i_n_e_s (_C-_X _C-_O)

This deletes all the blank lines around point.   This  is  useful
when  you previously opened many lines with "C-O" and now wish to
delete the unused ones.

_1_6._5_5.  _d_e_l_e_t_e-_b_u_f_f_e_r (_C-_X _K)

This deletes a buffer and frees up all the memory associated with
it.   Be  careful(!)  - once a buffer has been deleted it is gone
forever.  JOVE will ask you to confirm if you  try  to  delete  a
buffer  that  needs saving.  This command is useful for when JOVE
runs out of space to store new buffers.

_1_6._5_6.  _d_e_l_e_t_e-_c_u_r_r_e_n_t-_w_i_n_d_o_w (_C-_X _D)

This deletes the current window and moves point into one  of  the
remaining ones.  It is an error to try to delete the only remain-
ing window.

_1_6._5_7.  _d_e_l_e_t_e-_m_a_c_r_o (_N_o_t _B_o_u_n_d)

This deletes a macro from the list of named  macros.   It  is  an
error to delete the keyboard-macro.  Once the macro is deleted it
is gone forever.  If you are about to save macros to a  file  and
decide you don't want to save a particular one, delete it.





                           May 2, 1988





USD:17-46                              JOVE Manual for UNIX Users


_1_6._5_8.  _d_e_l_e_t_e-_n_e_x_t-_c_h_a_r_a_c_t_e_r (_C-_D)

This deletes the character that's just after point (that is,  the
character  under  the cursor).  If point is at the end of a line,
the line separator is deleted and the next line  is  joined  with
the current one.

_1_6._5_9.  _d_e_l_e_t_e-_o_t_h_e_r-_w_i_n_d_o_w_s (_C-_X _1)

This deletes all the other windows except the current one.   This
can be thought of as going back into One Window mode.

_1_6._6_0.  _d_e_l_e_t_e-_p_r_e_v_i_o_u_s-_c_h_a_r_a_c_t_e_r (_R_u_b_o_u_t)

This deletes the character that's just before point (that is, the
character  before  the  cursor).  If point is at the beginning of
the line, the line separator is deleted and that line  is  joined
with the previous one.

_1_6._6_1.  _d_e_l_e_t_e-_w_h_i_t_e-_s_p_a_c_e (_E_S_C \)

This deletes all the Tabs and Spaces around point.

_1_6._6_2.  _d_e_s_c_r_i_b_e-_b_i_n_d_i_n_g_s (_N_o_t _B_o_u_n_d)

This types out a list containing each bound key and  the  command
that  gets  invoked every time that key is typed.  To make a wall
chart of JOVE commands, set _s_e_n_d-_t_y_p_e_o_u_t-_t_o-_b_u_f_f_e_r  to  "on"  and
JOVE  will  store the key bindings in a buffer which you can save
to a file and then print.

_1_6._6_3.  _d_e_s_c_r_i_b_e-_c_o_m_m_a_n_d (_N_o_t _B_o_u_n_d)

This prints some info on a specified command.

_1_6._6_4.  _d_e_s_c_r_i_b_e-_k_e_y (_N_o_t _B_o_u_n_d)

This waits for you to type a key and then tells the name  of  the
command  that  gets invoked every time that key is hit.  Once you
have the name of the command you  can  use  the  _d_e_s_c_r_i_b_e-_c_o_m_m_a_n_d
command to find out exactly what it does.

_1_6._6_5.  _d_e_s_c_r_i_b_e-_v_a_r_i_a_b_l_e (_N_o_t _B_o_u_n_d)

This prints some info on a specified variable.

_1_6._6_6.  _d_i_g_i_t (_E_S_C [_0-_9])

This reads a numeric argument.  When you type "ESC" followed by a
number,  "digit"  keeps reading numbers until you type some other
command.  Then that command is executes with the numeric argument
you specified.





                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-47


_1_6._6_7.  _d_i_g_i_t-_1 (_N_o_t _B_o_u_n_d)

This pretends you typed "ESC 1".  This is  useful  for  terminals
that  have  keypads that send special sequences for numbers typed
on the keypad as opposed to  numbers  typed  from  the  keyboard.
This can save having type "ESC" when you want to specify an argu-
ment.

_1_6._6_8.  _d_i_g_i_t-_2 (_N_o_t _B_o_u_n_d)

This pretends you typed "ESC 2".  This is  useful  for  terminals
that  have  keypads that send special sequences for numbers typed
on the keypad as opposed to  numbers  typed  from  the  keyboard.
This can save having type "ESC" when you want to specify an argu-
ment.

_1_6._6_9.  _d_i_g_i_t-_3 (_N_o_t _B_o_u_n_d)

This pretends you typed "ESC 3".  This is  useful  for  terminals
that  have  keypads that send special sequences for numbers typed
on the keypad as opposed to  numbers  typed  from  the  keyboard.
This can save having type "ESC" when you want to specify an argu-
ment.

_1_6._7_0.  _d_i_g_i_t-_4 (_N_o_t _B_o_u_n_d)

This pretends you typed "ESC 4".  This is  useful  for  terminals
that  have  keypads that send special sequences for numbers typed
on the keypad as opposed to  numbers  typed  from  the  keyboard.
This can save having type "ESC" when you want to specify an argu-
ment.

_1_6._7_1.  _d_i_g_i_t-_5 (_N_o_t _B_o_u_n_d)

This pretends you typed "ESC 5".  This is  useful  for  terminals
that  have  keypads that send special sequences for numbers typed
on the keypad as opposed to  numbers  typed  from  the  keyboard.
This can save having type "ESC" when you want to specify an argu-
ment.

_1_6._7_2.  _d_i_g_i_t-_6 (_N_o_t _B_o_u_n_d)

This pretends you typed "ESC 6".  This is  useful  for  terminals
that  have  keypads that send special sequences for numbers typed
on the keypad as opposed to  numbers  typed  from  the  keyboard.
This can save having type "ESC" when you want to specify an argu-
ment.

_1_6._7_3.  _d_i_g_i_t-_7 (_N_o_t _B_o_u_n_d)

This pretends you typed "ESC 7".  This is  useful  for  terminals
that  have  keypads that send special sequences for numbers typed
on the keypad as opposed to  numbers  typed  from  the  keyboard.
This  can  save  having  type  "ESC"  when you want to specify an



                           May 2, 1988





USD:17-48                              JOVE Manual for UNIX Users


argument.

_1_6._7_4.  _d_i_g_i_t-_8 (_N_o_t _B_o_u_n_d)

This pretends you typed "ESC 8".  This is  useful  for  terminals
that  have  keypads that send special sequences for numbers typed
on the keypad as opposed to  numbers  typed  from  the  keyboard.
This can save having type "ESC" when you want to specify an argu-
ment.

_1_6._7_5.  _d_i_g_i_t-_9 (_N_o_t _B_o_u_n_d)

This pretends you typed "ESC 9".  This is  useful  for  terminals
that  have  keypads that send special sequences for numbers typed
on the keypad as opposed to  numbers  typed  from  the  keyboard.
This can save having type "ESC" when you want to specify an argu-
ment.

_1_6._7_6.  _d_i_g_i_t-_0 (_N_o_t _B_o_u_n_d)

This pretends you typed "ESC 0".  This is  useful  for  terminals
that  have  keypads that send special sequences for numbers typed
on the keypad as opposed to  numbers  typed  from  the  keyboard.
This can save having type "ESC" when you want to specify an argu-
ment.

_1_6._7_7.  _d_i_r_s (_N_o_t _B_o_u_n_d)

This prints out the directory  stack.   See  the  "cd",  "pushd",
"popd" commands for more info.

_1_6._7_8.  _d_i_s_a_b_l_e-_b_i_f_f (_v_a_r_i_a_b_l_e)

When this is set, JOVE disables  biff  when  you're  editing  and
enables  it  again when you get out of JOVE, or when you pause to
the parent shell or push to a new shell. (This means  arrival  of
new  mail  will  not  be  immediately apparent but will not cause
indiscriminate writing on the display). The default is "off".

_1_6._7_9.  _d_i_s_p_l_a_y-_b_a_d-_f_i_l_e_n_a_m_e_s (_v_a_r_i_a_b_l_e)

This variable affects only filename  completion,  in  particular,
what  happens when "?" is typed while prompting for a file.  When
this variable is ON, any files that end with one  of  the  exten-
sions  defined  by  the  variable _b_a_d-_f_i_l_e_n_a_m_e-_e_x_t_e_n_s_i_o_n_s will be
displayed with an "!" in front of  their  names.   When  _d_i_s_p_l_a_y-
_b_a_d-_f_i_l_e_n_a_m_e_s is OFF the files will not be displayed at all.  The
default value is on.

_1_6._8_0.  _d_o_w_n-_l_i_s_t (_E_S_C _C-_D)

This is the opposite of _b_a_c_k_w_a_r_d-_u_p-_l_i_s_t.  It's not clear  to  me
that this command serves any useful purpose in life.  Try it out,
and let me know what you think.



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-49


_1_6._8_1.  _d_s_t_o_p-_p_r_o_c_e_s_s (_N_o_t _B_o_u_n_d)

Send the "dsusp" character to the current process.  This  is  the
character  that suspends a process on the next read from the ter-
minal.  Most people have it set to C-Y.  This only works  if  you
have  the interactive process feature, and if you are in a buffer
bound to a process.

_1_6._8_2.  _e_d_i_t-_w_o_r_d-_a_b_b_r_e_v_s (_N_o_t _B_o_u_n_d)

This creates a buffer with a list of each  abbreviation  and  the
phrase  it  expands  into, and enters a recursive edit to let you
change the abbreviations or add some more.  The  format  of  this
list  is "abbreviation:phrase" so if you add some more you should
follow that format.  It's probably simplest  just  to  copy  some
already  existing abbreviations and edit them.  When you are done
you type "C-X C-C" to exit the recursive edit.

_1_6._8_3.  _e_n_d-_k_b_d-_m_a_c_r_o (_C-_X ))

This stops the definition of the keyboard macro.   Because  of  a
bug  in JOVE, this must be bound to "C-X )", or some key sequence
which is one or two characters long.  Anything else will not work
properly.

_1_6._8_4.  _e_n_d-_o_f-_f_i_l_e (_E_S_C >)

This moves point forward to the end of the  buffer.   This  some-
times  prints  the  "Point  Pushed"  message.   If the end of the
buffer isn't on the screen JOVE will set the mark so you  can  go
back to where you were if you want.

_1_6._8_5.  _e_n_d-_o_f-_l_i_n_e (_C-_E)

This moves point to the end of the current line.  If the line  is
too  long  to  fit on the screen JOVE will scroll the line to the
left to make the end of the line visible.  The  line  will  slide
back to its normal position when you move backward past the left-
most visible character or when you move off the line altogether.

_1_6._8_6.  _e_n_d-_o_f-_w_i_n_d_o_w (_E_S_C .)

This moves point to the last character in the window.

_1_6._8_7.  _e_o_f-_p_r_o_c_e_s_s (_N_o_t _B_o_u_n_d)

Sends EOF to the current interactive process.  This only works on
versions of JOVE running under versions of UNIX with pty's.

_1_6._8_8.  _e_r_a_s_e-_b_u_f_f_e_r (_N_o_t _B_o_u_n_d)

This erases the contents of the specified buffer.  This  is  like
_d_e_l_e_t_e-_b_u_f_f_e_r  except  it only erases the contents of the buffer,
not the buffer itself.  If you try to erase a buffer  that  needs



                           May 2, 1988





USD:17-50                              JOVE Manual for UNIX Users


saving you will be asked to confirm it.

_1_6._8_9.  _e_r_r_o_r-_f_o_r_m_a_t-_s_t_r_i_n_g (_v_a_r_i_a_b_l_e)

This is the error format string that is used by  _p_a_r_s_e-_e_r_r_o_r_s  to
find  the  error  messages  in  a buffer.  The way it works is by
using this string as a JOVE  regular  expression  search  string,
where  the \('s and \)'s regular expression operators are used to
pick out the file name and line number from the  line  containing
an  error  message.   For instance, a typical error message might
look like this:

        "file.c", line 540: missing semi-colon

For strings of this  format,  an  appropriate  value  for  _e_r_r_o_r-
_f_o_r_m_a_t-_s_t_r_i_n_g would be something like this:

        ^"\([^"]*\)", line \([0-9]*\):

What this means is, to find an error message, search for  a  line
beginning with a double-quote.  Then it says that all the follow-
ing characters up to another double-quote should be remembered as
one  unit,  namely  the filename that the error is in (that's why
the first set of parens are surrounding it).  Then it  says  that
after the filename there will be the string ", line " followed by
a line number, which should be remembered as a single unit (which
is  why  the second set of parens is around that).  The only con-
straints on the error messages is that the  file  name  and  line
number  appear  on  the same line, and that the file name appears
before the line number.  Most compilers seem to do  this  anyway,
so this is not an unreasonable restriction.

If you do not know how to use regular expressions then this vari-
able will be hard for you to use.  Also note that you can look at
the default value of this variable by printing it out, but it  is
a  really  complicated string because it is trying to accommodate
the outputs of more than one compiler at a time.

_1_6._9_0.  _e_r_r_o_r-_w_i_n_d_o_w-_s_i_z_e (_v_a_r_i_a_b_l_e)

This is the percentage of the screen to use for the  error-window
on  the  screen.   When you execute _c_o_m_p_i_l_e-_i_t, _e_r_r_o_r-_w_i_n_d_o_w-_s_i_z_e
percent of the screen will go to the error window.  If the window
already  exists  and  is  a different size, it is made to be this
size.  The default value is 20%.

_1_6._9_1.  _e_x_c_h_a_n_g_e-_p_o_i_n_t-_a_n_d-_m_a_r_k (_C-_X _C-_X)

This moves point to mark and makes mark the old point.   This  is
for quickly moving from one end of the region to another.

_1_6._9_2.  _e_x_e_c_u_t_e-_k_b_d-_m_a_c_r_o (_C-_X _E)

This executes the  keyboard  macro.   If  you  supply  a  numeric



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-51


argument the macro is executed that many times.

_1_6._9_3.  _e_x_e_c_u_t_e-_m_a_c_r_o (_N_o_t _B_o_u_n_d)

This executes a specified macro.  If you supply a  numeric  argu-
ment the macro is executed that many times.

_1_6._9_4.  _e_x_e_c_u_t_e-_n_a_m_e_d-_c_o_m_m_a_n_d (_E_S_C _X)

This is the way to execute a command that isn't bound to any key.
When you are prompted with ": " you can type the name of the com-
mand.  You don't have to type the entire name.  Once the  command
is  unambiguous you can type Space and JOVE will fill in the rest
for you.  If you are not sure of the name of  the  command,  type
"?" and JOVE will print a list of all the commands that you could
possibly match given what you've already  typed.   If  you  don't
have  any  idea  what  the  command's name is but you know it has
something to do with windows (for example), you  can  do  "ESC  X
apropos  window"  and  JOVE will print a list of all the commands
that are related to windows.  If  you  find  yourself  constantly
executing  the  same  commands this way you probably want to bind
them to keys so that you can execute them more quickly.  See  the
_b_i_n_d-_t_o-_k_e_y command.

_1_6._9_5.  _e_x_i_t-_j_o_v_e (_C-_X _C-_C)

This exits JOVE.  If any buffers need saving JOVE  will  print  a
warning  message  and ask for confirmation.  If you leave without
saving your buffers all your work will be lost.  If  you  made  a
mistake and really do want to exit then you can.  If you are in a
recursive editing level _e_x_i_t-_j_o_v_e will return you from that.

_1_6._9_6.  _e_x_p_a_n_d-_e_n_v_i_r_o_n_m_e_n_t-_v_a_r_i_a_b_l_e_s (_V_a_r_i_a_b_l_e)

When this variable is on JOVE will try to expand any  strings  of
the  form "$var" into the value of the environment variable "var"
when in the minibuffer.  For example, if you type  $HOME/.joverc,
"$HOME"  will  be  replaced with you home directory.  The default
value is off.

_1_6._9_7.  _f_i_l_e-_c_r_e_a_t_i_o_n-_m_o_d_e (_v_a_r_i_a_b_l_e)

This variable has an octal value.   It  contains  the  mode  (see
_c_h_m_o_d(_1)  )  with  which files should be created.  This mode gets
modified by your current umask  setting  (see  _u_m_a_s_k(_1)  ).   The
default value is usually _0_6_6_6 or _0_6_4_4.

_1_6._9_8.  _f_i_l_e_s-_s_h_o_u_l_d-_e_n_d-_w_i_t_h-_n_e_w_l_i_n_e (_v_a_r_i_a_b_l_e)

This variable indicates that all files should always have a  new-
line  at  the end.  This is often necessary for line printers and
the like.  When set, if JOVE is writing a file whose last charac-
ter is not a newline, it will add one automatically.




                           May 2, 1988





USD:17-52                              JOVE Manual for UNIX Users


_1_6._9_9.  _f_i_l_l-_c_o_m_m_e_n_t (_N_o_t _B_o_u_n_d)

This command fills in your C comments to  make  them  pretty  and
readable.   This  filling is done according the variable _c_o_m_m_e_n_t-
_f_o_r_m_a_t.

/*
 * the default format makes comments like this.
 */

This can be changed  by  changing  the  format  variable.   Other
languages  may  be  supported  by  changing  the  format variable
appropriately.  The formatter looks backwards  from  dot  for  an
open  comment symbol.  If found, all indentation is done relative
the position of the first character of the open symbol.  If there
is  a matching close symbol, the entire comment is formatted.  If
not, the region between dot and the open symbol is reformatted.

_1_6._1_0_0.  _f_i_l_l-_p_a_r_a_g_r_a_p_h (_E_S_C _J)

This rearranges words between lines so that all the lines in  the
current  paragraph  extend as close to the right margin as possi-
ble, ensuring that none of the lines will  be  greater  than  the
right  margin.  The default value for _r_i_g_h_t-_m_a_r_g_i_n is 78, but can
be changed with the _s_e_t and _r_i_g_h_t-_m_a_r_g_i_n-_h_e_r_e commands.  JOVE has
a  complicated algorithm for determining the beginning and end of
the paragraph.  In the normal case JOVE will give all  the  lines
the  same indent as they currently have, but if you wish to force
a new indent you can supply a numeric argument to  _f_i_l_l-_p_a_r_a_g_r_a_p_h
(e.g., by typing C-U ESC J) and JOVE will indent each line to the
column specified by  the  _l_e_f_t-_m_a_r_g_i_n  variable.   See  also  the
_l_e_f_t-_m_a_r_g_i_n variable and _l_e_f_t-_m_a_r_g_i_n-_h_e_r_e command.

_1_6._1_0_1.  _f_i_l_l-_r_e_g_i_o_n (_N_o_t _B_o_u_n_d)

This is like _f_i_l_l-_p_a_r_a_g_r_a_p_h,  except  it  operates  on  a  region
instead of just a paragraph.

_1_6._1_0_2.  _f_i_l_t_e_r-_r_e_g_i_o_n (_N_o_t _B_o_u_n_d)

This sends the text in the region to a UNIX command, and replaces
the  region  with  the output from that command.  For example, if
you are lazy and don't like to take the time  to  write  properly
indented  C  code,  you can put the region around your C file and
_f_i_l_t_e_r-_r_e_g_i_o_n it through _c_b, the UNIX C beautifier.  If you  have
a  file that contains a bunch of lines that need to be sorted you
can do that from inside JOVE too, by filtering the region through
the  _s_o_r_t  UNIX command.  Before output from the command replaces
the region JOVE stores the old text in the kill ring, so  if  you
are unhappy with the results you can easily get back the old text
with "C-Y".






                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-53


_1_6._1_0_3.  _f_i_n_d-_f_i_l_e (_C-_X _C-_F)

This visits a file into its own  buffer  and  then  selects  that
buffer.   If  you've already visited this file in another buffer,
that buffer is selected.  If the file  doesn't  yet  exist,  JOVE
will print "(New file)" so that you know.

_1_6._1_0_4.  _f_i_n_d-_t_a_g (_C-_X _T)

This finds the file that contains the specified tag.  JOVE  looks
up  tags  by default in the "tags" file in the current directory.
You can change the default tag name by setting the _t_a_g-_f_i_l_e vari-
able  to another name.  If you specify a numeric argument to this
command, you will be prompted for a tag file.  This is a good way
to specify another tag file without changing the default.  If the
tag cannot be found the error is reported and point  stays  where
it is.

_1_6._1_0_5.  _f_i_n_d-_t_a_g-_a_t-_p_o_i_n_t (_N_o_t _B_o_u_n_d)

This finds the file that contains the tag that point is currently
on.  See _f_i_n_d-_t_a_g.

_1_6._1_0_6.  _f_i_r_s_t-_n_o_n-_b_l_a_n_k (_E_S_C _M)

This moves point back to the indent of the current line.

_1_6._1_0_7.  _f_o_r_e_g_r_o_u_n_d-_c_o_l_o_r (_v_a_r_i_a_b_l_e)

This specifies the foreground color of  the  screen  (PC  version
only).   The default is 1, which stands for white.  The attribute
used for writing to the screen is formed by (bg&7)<<4 & (fg&7).

_1_6._1_0_8.  _f_o_r_w_a_r_d-_c_h_a_r_a_c_t_e_r (_C-_F)

This moves forward over a single character.  If point is  at  the
end of the line it moves to the beginning of the next one.

_1_6._1_0_9.  _f_o_r_w_a_r_d-_l_i_s_t (_E_S_C _C-_N)

This is like _f_o_r_w_a_r_d-_s-_e_x_p_r_e_s_s_i_o_n  except  it  moves  over  lists
ONLY.  What this does is search for the next "(" and then move to
the matching ")".  This is useful for when you are trying to find
mismatched parentheses in a program.

_1_6._1_1_0.  _f_o_r_w_a_r_d-_p_a_r_a_g_r_a_p_h (_E_S_C ])

This moves point forward to the end of the current or next  para-
graph.   Paragraphs are bounded by lines that begin with a Period
or Tab, or by blank lines; a change in indentation may also  sig-
nal a break between paragraphs, except that JOVE allows the first
line of a paragraph to be indented  differently  from  the  other
lines.




                           May 2, 1988





USD:17-54                              JOVE Manual for UNIX Users


_1_6._1_1_1.  _f_o_r_w_a_r_d-_s-_e_x_p_r_e_s_s_i_o_n (_E_S_C _C-_F)

This moves point forward over a s-expression.  If the first  sig-
nificant character after point is "(", this moves past the match-
ing ")".  If the character begins an identifier, this moves  just
past it.  This is mode dependent, so this will move over atoms in
LISP mode and C identifiers in C mode.  JOVE also matches "{".

_1_6._1_1_2.  _f_o_r_w_a_r_d-_s_e_n_t_e_n_c_e (_E_S_C _E)

This moves point forward to the end of the current or  next  sen-
tence.  JOVE considers the end of a sentence to be the characters
".", "!" or "?" followed by a Return, or one or more spaces.

_1_6._1_1_3.  _f_o_r_w_a_r_d-_w_o_r_d (_E_S_C _F)

This moves point forward to the end of the current or next word.

_1_6._1_1_4.  _f_u_n_d_a_m_e_n_t_a_l-_m_o_d_e (_N_o_t _B_o_u_n_d)

This sets the major mode to Fundamental.  This affects what  JOVE
considers  as  characters  that  make  up  words.   For instance,
Single-quote is not part of a word in Fundamental mode, but is in
Text mode.

_1_6._1_1_5.  _g_a_t_h_e_r-_n_u_m_e_r_i_c-_a_r_g_u_m_e_n_t (_C-_U)

This command is one of two ways to specify a numeric argument  to
a command.  It's usually bound to C-U.  Typing C-U once means, Do
the next command 4 times.  Typing C-U twice will do the next com-
mand  16  times,  and  so on.  If at any point you type a number,
then that number will be used instead of 4.  For instance, C-U  3
5 means do the next command 35 times.

_1_6._1_1_6.  _g_o_t_o-_l_i_n_e (_E_S_C _G)

If a numeric argument is supplied point moves to the beginning of
that line.  If no argument is supplied one is prompted for.

_1_6._1_1_7.  _g_o_t_o-_w_i_n_d_o_w-_w_i_t_h-_b_u_f_f_e_r (_N_o_t _B_o_u_n_d)

This command prompts for a  buffer  name  and  then  select  that
buffer.  If the buffer is currently being displayed in one of the
windows, that window is selected instead.

_1_6._1_1_8.  _g_r_i_n_d-_s-_e_x_p_r (_N_o_t _B_o_u_n_d)

When point is positioned on a  "(",  this  re-indents  that  LISP
expression.

_1_6._1_1_9.  _g_r_o_w-_w_i_n_d_o_w (_C-_X ^)

This makes the current window one line bigger.  This  only  works
when  there is more than one window and provided there is room to



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-55


change the size.

_1_6._1_2_0.  _h_a_n_d_l_e-_t_a_b (_T_a_b)

This handles indenting to the "right" place in C and  Lisp  mode,
and just inserts itself in Text mode.

_1_6._1_2_1.  _i-_s_e_a_r_c_h-_f_o_r_w_a_r_d (_N_o_t _B_o_u_n_d)

Incremental search.  Like search-forward except that  instead  of
prompting for a string and searching for that string all at once,
it accepts the string one character at a time.  After each  char-
acter  you type as part of the search string, it searches for the
entire string so far.  When you like  what  it  found,  type  the
Return  key  to finish the search.  You can take back a character
with Rubout and the search will back up to  the  position  before
that character was typed.  C-G aborts the search.

_1_6._1_2_2.  _i-_s_e_a_r_c_h-_r_e_v_e_r_s_e (_N_o_t _B_o_u_n_d)

Incremental search.  Like search-reverse except that  instead  of
prompting for a string and searching for that string all at once,
it accepts the string one character at a time.  After each  char-
acter  you type as part of the search string, it searches for the
entire string so far.  When you like  what  it  found,  type  the
Return  key  to finish the search.  You can take back a character
with Rubout and the search will back up to  the  position  before
that character was typed.  C-G aborts the search.

_1_6._1_2_3.  _i-_s_h_e_l_l-_c_o_m_m_a_n_d (_N_o_t _B_o_u_n_d)

This is like _s_h_e_l_l-_c_o_m_m_a_n_d except it lets you continue with  your
editing  while the command is running.  This is really useful for
long running commands with sporadic output.  See the  manual  for
information on how to use interactive processes.

_1_6._1_2_4.  _i_n_s_e_r_t-_f_i_l_e (_C-_X _C-_I)

This inserts a specified file into the current buffer  at  point.
Point is positioned at the beginning of the inserted file.

_1_6._1_2_5.  _i_n_t_e_r_n_a_l-_t_a_b_s_t_o_p (_v_a_r_i_a_b_l_e)

The number of spaces JOVE should print when  it  displays  a  tab
character.  The default value is 8.

_1_6._1_2_6.  _i_n_t_e_r_r_u_p_t-_c_h_a_r_a_c_t_e_r (_v_a_r_i_a_b_l_e)

This is set to the character that interrupts JOVE (with a signal)
no  matter what JOVE is doing.  It's main use is for interrupting
non-interactive processes, but it also has  uses  for  debugging.
Unfortunately  there  is no way to turn off the interrupt charac-
ter.




                           May 2, 1988





USD:17-56                              JOVE Manual for UNIX Users


_1_6._1_2_7.  _i_n_t_e_r_r_u_p_t-_p_r_o_c_e_s_s (_N_o_t _B_o_u_n_d)

This sends the interrupt character (usually C-C) to the  interac-
tive process in the current buffer.  This is only for versions of
JOVE that have the  interactive  processes  feature.   This  only
works when you are inside a buffer that's attached to a process.

_1_6._1_2_8.  _k_i_l_l-_n_e_x_t-_w_o_r_d (_E_S_C _D)

This kills the text from point to the end of the current or  next
word.

_1_6._1_2_9.  _k_i_l_l-_p_r_e_v_i_o_u_s-_w_o_r_d (_E_S_C _R_u_b_o_u_t)

This kills the text from point to the beginning of the current or
previous word.

_1_6._1_3_0.  _k_i_l_l-_p_r_o_c_e_s_s (_N_o_t _B_o_u_n_d)

This command prompts for a buffer name or buffer number (just  as
select-buffer  does)  and then sends the process in that buffer a
kill signal (9).

_1_6._1_3_1.  _k_i_l_l-_r_e_g_i_o_n (_C-_W)

This deletes the text in the region and  saves  it  on  the  kill
ring.  Commands that delete text but save it on the kill ring all
have the word "kill" in their names.  Type "C-Y" to yank back the
most recent kill.

_1_6._1_3_2.  _k_i_l_l-_s-_e_x_p_r_e_s_s_i_o_n (_E_S_C _C-_K)

This kills the text from point to the end of the current or  next
s-expression.

_1_6._1_3_3.  _k_i_l_l-_s_o_m_e-_b_u_f_f_e_r_s (_N_o_t _B_o_u_n_d)

This goes through all the existing buffers and  asks  whether  or
not  to  kill them.  If you decide to kill a buffer, and it turns
out that the buffer is modified,  JOVE  will  offer  to  save  it
first.   This is useful for when JOVE runs out of memory to store
lines (this only happens  on  PDP-11's)  and  you  have  lots  of
buffers that you are no longer using.

_1_6._1_3_4.  _k_i_l_l-_t_o-_b_e_g_i_n_n_i_n_g-_o_f-_s_e_n_t_e_n_c_e (_C-_X _R_u_b_o_u_t)

This kills from point to the beginning of the current or previous
sentence.

_1_6._1_3_5.  _k_i_l_l-_t_o-_e_n_d-_o_f-_l_i_n_e (_C-_K)

This kills from point to the end of the current line.  When point
is  at  the end of the line the line separator is deleted and the
next line is joined with current one.  If a numeric  argument  is



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-57


supplied  that many lines are killed; if the argument is negative
that many lines _b_e_f_o_r_e point are killed; if the argument is  zero
the text from point to the beginning of the line is killed.

_1_6._1_3_6.  _k_i_l_l-_t_o-_e_n_d-_o_f-_s_e_n_t_e_n_c_e (_E_S_C _K)

This kills from point to the end of the current or next sentence.
If a negative numeric argument is supplied it kills from point to
the beginning of the current or previous sentence.

_1_6._1_3_7.  _l_e_f_t-_m_a_r_g_i_n (_v_a_r_i_a_b_l_e)

This is how far lines should be indented when auto-indent mode is
on,  or  when  the  _n_e_w_l_i_n_e-_a_n_d-_i_n_d_e_n_t command is run (usually by
typing LineFeed).  It is also used by  fill-paragraph  and  auto-
fill mode.  If the value is zero (the default) then the left mar-
gin is determined from the surrounding lines.

_1_6._1_3_8.  _l_e_f_t-_m_a_r_g_i_n-_h_e_r_e (_N_o_t _B_o_u_n_d)

This sets the _l_e_f_t-_m_a_r_g_i_n variable to  the  current  position  of
point.   This  is an easy way to say, "Make the left margin begin
here," without having to count the number of spaces over it actu-
ally is.

_1_6._1_3_9.  _l_i_s_p-_m_o_d_e (_N_o_t _B_o_u_n_d)

This turns on Lisp mode.  Lisp  mode  is  one  of  four  mutually
exclusive  major  modes: Fundamental, Text, C, and Lisp.  In Lisp
mode, the characters Tab and ) are treated specially, similar  to
the  way  they  are treated in C mode.  Also, Auto Indent mode is
affected, and handled specially.

_1_6._1_4_0.  _l_i_s_t-_b_u_f_f_e_r_s (_C-_X _C-_B)

This types out a list containing various information  about  each
buffer.  Right now that list looks like this:

         (* means the buffer needs saving)
         NO  Lines Type        Name           File
         --  ----- ----        ----           ----
         1   1     File        Main           [No file]
         2   1     Scratch   * Minibuf        [No file]
         3   519   File      * commands.doc   commands.doc

The first column lists the buffer's number.   When  JOVE  prompts
for  a  buffer  name you can either type in the full name, or you
can simply type the buffer's number.  The second  column  is  the
number  of  lines  in  the  buffer.   The third says what type of
buffer.  There are four types: "File", "Scratch", "Process",  "I-
Process".  "File" is simply a buffer that holds a file; "Scratch"
is for buffers that JOVE uses internally; "Process" is  one  that
holds the output from a UNIX command; "I-Process" is one that has
an interactive process attached to it.  The next column  contains



                           May 2, 1988





USD:17-58                              JOVE Manual for UNIX Users


the  name  of the buffer.  And the last column is the name of the
file that's attached to the buffer.  In this case,  both  Minibuf
and  commands.doc  have  been changed but not yet saved.  In fact
Minibuf won't be saved since it's an internal JOVE buffer that  I
don't even care about.

_1_6._1_4_1.  _l_i_s_t-_p_r_o_c_e_s_s_e_s (_N_o_t _B_o_u_n_d)

This makes a list somewhat like "list-buffers" does,  except  its
list  consists  of  the current interactive processes.  Right now
the list looks like this:

         Buffer           Status           Pid    Command
         ------           ------           ---    -------
         *shell*          Running          18415shell
         fgrep            Done             18512   fgrep -n Buffer *.c

The first column has the name of the buffer to which the  process
is attached.  The second has the status of the process; if a pro-
cess has exited normally the status is "Done" as in fgrep; if the
process  exited  with  an error the status is "Exit N" where N is
the value of the exit code; if the process  was  killed  by  some
signal the status is the name of the signal that was used; other-
wise the process is running.  The last column is the name of  the
command that is being run.

_1_6._1_4_2.  _m_a_i_l-_c_h_e_c_k-_f_r_e_q_u_e_n_c_y (_v_a_r_i_a_b_l_e)

This is how often (in seconds) JOVE should check your mailbox for
incoming mail.  See also the _m_a_i_l_b_o_x and _d_i_s_a_b_l_e-_b_i_f_f variables.

_1_6._1_4_3.  _m_a_i_l_b_o_x (_v_a_r_i_a_b_l_e)

Set this to the full pathname of your mailbox.   JOVE  will  look
here  to  decide  whether  or not you have any unread mail.  This
defaults to /usr/spool/mail/$USER, where $USER  is  set  to  your
login name.

_1_6._1_4_4.  _m_a_k_e-_b_a_c_k_u_p-_f_i_l_e_s (_v_a_r_i_a_b_l_e)

If this variable is set, then whenever JOVE writes out a file, it
will  move the previous version of the file (if there was one) to
"#filename".  This is often convenient if  you  save  a  file  by
accident.   The  default  value of this variable is "off".  _N_o_t_e:
this is an optional part of JOVE, and your guru may not  have  it
enabled, so it may not work.

_1_6._1_4_5.  _m_a_k_e-_b_u_f_f_e_r-_u_n_m_o_d_i_f_i_e_d (_E_S_C ~)

This makes JOVE think the selected  buffer  hasn't  been  changed
even if it has.  Use this when you accidentally change the buffer
but don't want it considered changed.  Watch the mode line to see
the * disappear when you use this command.




                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-59


_1_6._1_4_6.  _m_a_k_e-_m_a_c_r_o-_i_n_t_e_r_a_c_t_i_v_e (_N_o_t _B_o_u_n_d)

This command is meaningful only while you are defining a keyboard
macro,  and  when  you are in the minibuffer.  Ordinarily, when a
command in a macro definition requires a trailing  text  argument
(file name, search string, etc.), the argument you supply becomes
part of the macro definition.  If you want to be able to supply a
different  argument  each  time the macro is used, then while you
are defining it, you should give the make-macro-interactive  com-
mand  just  before  typing the argument which will be used during
the definition process.  Note: you must bind this  command  to  a
key  in  order  to  use  it;  you  can't  say  "ESC X make-macro-
interactive".

_1_6._1_4_7.  _m_a_r_k-_t_h_r_e_s_h_o_l_d (_v_a_r_i_a_b_l_e)

This variable contains the number of  lines  point  may  move  by
before  the  mark  is  set.   If, in a search or something, point
moves by more than this many lines, the mark is set so  that  you
may return easily.  The default value of this variable is 22 (one
screenful, on most terminals).

_1_6._1_4_8.  _m_a_r_k_s-_s_h_o_u_l_d-_f_l_o_a_t (_v_a_r_i_a_b_l_e)

When this variable is "off", the position of a mark is remembered
as  a line number within the buffer and a character number within
the line.  If you add or delete text before the mark, it will  no
longer  point to the text you marked originally because that text
is no longer at the same line and character  number.   When  this
variable  is  "on", the position of a mark is adjusted to compen-
sate for each insertion and deletion.  This makes marks much more
sensible  to use, at the cost of slowing down insertion and dele-
tion somewhat.  The default value is "on".

_1_6._1_4_9.  _m_a_t_c_h-_r_e_g_u_l_a_r-_e_x_p_r_e_s_s_i_o_n_s (_v_a_r_i_a_b_l_e)

When set, JOVE will match regular expressions in search patterns.
This  makes  special the characters ., *, [, ], ^, and $, and the
two-character sequences \<, \>, \{, \} and  \|.   See  the  _e_d(_1)
manual  page,  the  tutorial "Advanced Editing in UNIX ", and the
section above  "Searching  with  Regular  Expressions"  for  more
information.

_1_6._1_5_0.  _m_e_t_a-_k_e_y (_v_a_r_i_a_b_l_e)

You should set this variable to "on" if your terminal has a  real
Meta  key.   If your terminal has such a key, then a key sequence
like ESC Y can be entered by holding  down  Meta  and  typing  Y.
NOTE:  This disables interrupting noninteractive shell commands.

_1_6._1_5_1.  _m_o_d_e-_l_i_n_e (_v_a_r_i_a_b_l_e)

The format of the mode line can be  determined  by  setting  this
variable.   The items in the line are specified using a printf(3)



                           May 2, 1988





USD:17-60                              JOVE Manual for UNIX Users


format, with the special things being marked as "%x".  Digits may
be used between the 'x' may be:

             C    check for new mail, and displays "[New mail]" if there
                  is any (see also the mail-check-interval and disable-biff
                  variables)
             F    the current file name, with leading path stripped
             M    the current list of major and minor modes
             b    the current buffer name
             c    the fill character (-)
             d    the current directory
             e    end of string--this must be the last item in the string
             f    the current file name
             l    the current load average (updated automatically)
             mxy  x, when the buffer is modified or y, when not
             n    the current buffer number
             s    space, but only if previous character is not a space
             t    the current time (updated automatically)
             [ ]  the square brackets printed when in a recursive edit
             ( )  items enclosed in %( ... %) will only be printed on
                  the bottom mode line, rather than copied when the
                  window is split

In addition, any other character is simply copied into  the  mode
line.  Characters may be escaped with a backslash.  To get a feel
for all this, try typing "ESC X print mode-line" and compare  the
result with your current mode line.

_1_6._1_5_2.  _m_o_d_e-_l_i_n_e-_c_o_l_o_r (_v_a_r_i_a_b_l_e)

This specifies the color of the modeline (PC version only).   Its
default  value  is  0,  and  in  that case it is drawn in reverse
video.  If it has any other value, this  value  is  used  as  the
attribute in the Bios calls.

_1_6._1_5_3.  _m_o_d_e-_l_i_n_e-_s_h_o_u_l_d-_s_t_a_n_d_o_u_t (_v_a_r_i_a_b_l_e)

If set, the mode line will be printed in reverse video,  if  your
terminal supports it.  The default for this variable is "off".

_1_6._1_5_4.  _n_a_m_e-_k_b_d-_m_a_c_r_o (_N_o_t _B_o_u_n_d)

This copies the keyboard macro and gives it a name freeing up the
keyboard macro so you can define some more.  Keyboard macros with
their own names can be bound to keys just like built in  commands
can.   See the _d_e_f_i_n_e-_m_a_c_r_o, _s_o_u_r_c_e and _w_r_i_t_e-_m_a_c_r_o_s-_t_o-_f_i_l_e com-
mands.

_1_6._1_5_5.  _n_e_w_l_i_n_e (_R_e_t_u_r_n)

This divides the current line at point moving all the text to the
right  of  point  down  onto the newly created line.  Point moves
down to the beginning of the new line.




                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-61


_1_6._1_5_6.  _n_e_w_l_i_n_e-_a_n_d-_b_a_c_k_u_p (_C-_O)

This divides the current line at point moving all the text to the
right  of point down onto the newly created line.  The difference
between this and "newline" is that point does not  move  down  to
the beginning of the new line.

_1_6._1_5_7.  _n_e_w_l_i_n_e-_a_n_d-_i_n_d_e_n_t (_L_i_n_e_F_e_e_d)

This behaves the same was as Return  does  when  in  Auto  Indent
mode.  This makes Auto Indent mode obsolete but it remains in the
name of backward compatibility.

_1_6._1_5_8.  _n_e_x_t-_e_r_r_o_r (_C-_X _C-_N)

This moves to the next error in the  list  of  errors  that  were
parsed  with  _p_a_r_s_e-_e_r_r_o_r_s.   In one window the list of errors is
shown with the current one always at the top.  In another  window
is the file that contains the error.  Point is positioned in this
window on the line where the error occurred.

_1_6._1_5_9.  _n_e_x_t-_l_i_n_e (_C-_N)

This moves down to the next line.

_1_6._1_6_0.  _n_e_x_t-_p_a_g_e (_C-_V)

This displays the next page of the buffer by  taking  the  bottom
line  of  the window and redrawing the window with it at the top.
If there isn't another page in the buffer JOVE  rings  the  bell.
If  a numeric argument is supplied the screen is scrolled up that
many lines; if the argument is negative the  screen  is  scrolled
down.

_1_6._1_6_1.  _n_e_x_t-_w_i_n_d_o_w (_C-_X _N)

This moves into the next window.  Windows live in a circular list
so  when  you're  in the bottom window and you try to move to the
next one you are moved to the top window.  It is an error to  use
this command with only one window.

_1_6._1_6_2.  _n_u_m_b_e_r-_l_i_n_e_s-_i_n-_w_i_n_d_o_w (_N_o_t _B_o_u_n_d)

This displays the line numbers for each line in the buffer  being
displayed.  The number isn't actually part of the text; it's just
printed before the actual buffer line is.  To turn this  off  you
run the command again; it toggles.

_1_6._1_6_3.  _o_v_e_r-_w_r_i_t_e-_m_o_d_e (_N_o_t _B_o_u_n_d)

This turns Over Write mode on (or off if it's  currently  on)  in
the  selected  buffer.   When  on,  this mode changes the way the
self-inserting characters work.  Instead of inserting  themselves
and  pushing the rest of the line over to the right, they replace



                           May 2, 1988





USD:17-62                              JOVE Manual for UNIX Users


or over-write the existing character.  Also, Rubout replaces  the
character before point with a space instead of deleting it.  When
Over Write mode is on "OvrWt" is displayed on the mode line.

_1_6._1_6_4.  _p_a_g_e-_n_e_x_t-_w_i_n_d_o_w (_E_S_C _C-_V)

This displays the next page in the next window.  This is  exactly
the same as "C-X N C-V C-X P".

_1_6._1_6_5.  _p_a_r_e_n-_f_l_a_s_h () } ])

This handles the C mode curly brace indentation,  the  Lisp  mode
paren   indentation,   and   the   Show  Match  mode  paren/curly
brace/square bracket flashing.

_1_6._1_6_6.  _p_a_r_e_n-_f_l_a_s_h-_d_e_l_a_y (_v_a_r_i_a_b_l_e)

How long, in tenths of seconds, JOVE should pause on  a  matching
parenthesis in _S_h_o_w mode.  The default is 5.

_1_6._1_6_7.  _p_a_r_s_e-_e_r_r_o_r_s (_N_o_t _B_o_u_n_d)

This takes the list of  C  compilation  errors  (or  output  from
another  program  in  the  same format) in the current buffer and
parses them for use with the _n_e_x_t-_e_r_r_o_r  and  _p_r_e_v_i_o_u_s-_e_r_r_o_r  and
_c_u_r_r_e_n_t-_e_r_r_o_r  commands.   This  is  a very useful tool and helps
with compiling C programs and when used in conjunction  with  the
"grep"  UNIX command very helpful in making changes to a bunch of
files.  This command understands errors produced by cc, cpp,  and
lint;  plus  any  other program with the same format (e.g., "grep
-n").  JOVE visits each file that has an error and remembers each
line  that  contains  an  error.   It doesn't matter if later you
insert or delete some lines in  the  buffers  containing  errors;
JOVE  remembers  where  they  are  regardless.   _c_u_r_r_e_n_t-_e_r_r_o_r is
automatically executed after one of the parse  commands,  so  you
end  up at the first error.  See also _e_r_r_o_r-_f_o_r_m_a_t-_s_t_r_i_n_g to make
it possible to parse errors of a different format.

_1_6._1_6_8.  _p_a_r_s_e-_s_p_e_l_l_i_n_g-_e_r_r_o_r_s-_i_n-_b_u_f_f_e_r (_N_o_t _B_o_u_n_d)

This parses a list of words in the current buffer and looks  them
up  in  another  buffer  that you specify.  This will probably go
away soon.

_1_6._1_6_9.  _p_a_u_s_e-_j_o_v_e (_E_S_C _S)

This stops JOVE and returns control to the  parent  shell.   This
only  works for users using the C-shell, and on systems that have
the job control facility.  To return to JOVE you type "fg" to the
C-shell.

_1_6._1_7_0.  _p_h_y_s_i_c_a_l-_t_a_b_s_t_o_p (_v_a_r_i_a_b_l_e)

How many spaces  your  terminal  prints  when  it  prints  a  tab



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-63


character.

_1_6._1_7_1.  _p_o_p-_m_a_r_k (_N_o_t _B_o_u_n_d)

This gets executed when you run _s_e_t-_m_a_r_k with a numeric argument.
JOVE remembers the last 16 marks and you use _p_o_p-_m_a_r_k to go back-
ward through the ring of marks.  If you execute  _p_o_p-_m_a_r_k  enough
times you will eventually get back to where you started.

_1_6._1_7_2.  _p_o_p_d (_N_o_t _B_o_u_n_d)

This pops one entry off the directory stack.  Entries are  pushed
with  the  _p_u_s_h_d command.  The names were stolen from the C-shell
and the behavior is the same.

_1_6._1_7_3.  _p_r_e_v_i_o_u_s-_e_r_r_o_r (_C-_X _C-_P)

This is the same as _n_e_x_t-_e_r_r_o_r except it  goes  to  the  previous
error.  See _n_e_x_t-_e_r_r_o_r for documentation.

_1_6._1_7_4.  _p_r_e_v_i_o_u_s-_l_i_n_e (_C-_P)

This moves up to the previous line.

_1_6._1_7_5.  _p_r_e_v_i_o_u_s-_p_a_g_e (_E_S_C _V)

This displays the previous page of the current buffer  by  taking
the  top line and redrawing the window with it at the bottom.  If
a numeric argument is supplied the screen is scrolled  down  that
many  lines;  if  the argument is negative the screen is scrolled
up.

_1_6._1_7_6.  _p_r_e_v_i_o_u_s-_w_i_n_d_o_w (_C-_X _P _a_n_d _C-_X _O)

This moves into the next window.  Windows live in a circular list
so  when you're in the top window and you try to move to the pre-
vious one you are moved to the bottom window.  It is an error  to
use this command with only one window.

_1_6._1_7_7.  _p_r_i_n_t (_N_o_t _B_o_u_n_d)

This prints the value of a JOVE variable.

_1_6._1_7_8.  _p_r_o_c_e_s_s-_b_i_n_d-_t_o-_k_e_y (_N_o_t _B_o_u_n_d)

This command is identical to bind-to-key,  except  that  it  only
affects your bindings when you are in a buffer attached to a pro-
cess.  When you enter the process buffer,  any  keys  bound  with
this  command will automatically take their new values.  When you
switch to a non-process buffer, the old bindings for  those  keys
will be restored.  For example, you might want to execute

        process-bind-to-key stop-process ^Z
        process-bind-to-key interrupt-process ^C



                           May 2, 1988





USD:17-64                              JOVE Manual for UNIX Users


Then, when you start up an interactive process  and  switch  into
that  buffer,  C-Z will execute stop-process and C-C will execute
interrupt- process.   When  you  switch  back  to  a  non-process
buffer,  C-Z will go back to executing scroll-up (or whatever you
have it bound to).

_1_6._1_7_9.  _p_r_o_c_e_s_s-_n_e_w_l_i_n_e (_R_e_t_u_r_n)

This this only gets executed when in a buffer that is attached to
an interactive-process.  JOVE does two different things depending
on where you are when you hit Return.  When you're at the end  of
the  I-Process buffer this does what Return normally does, except
it also makes the line available to the process.  When  point  is
positioned  at some other position that line is copied to the end
of the buffer (with the prompt stripped) and point is moved there
with  it, so you can then edit that line before sending it to the
process.  This command _m_u_s_t be bound to the key you  usually  use
to  enter  shell  commands (Return), or else you won't be able to
enter any.

_1_6._1_8_0.  _p_r_o_c_e_s_s-_p_r_o_m_p_t (_v_a_r_i_a_b_l_e)

What a prompt looks  like  from  the  shell  and  i-shell-command
processes.   The  default  is  "%  ", the default C-shell prompt.
This is actually a regular expression search string.  So you  can
set  it  to be more than one thing at once using the \| operator.
For instance, for LISP hackers, the prompt can be

        "% -> <[0-9]>: ".


_1_6._1_8_1.  _p_r_o_c_e_s_s-_s_e_n_d-_d_a_t_a-_n_o-_r_e_t_u_r_n (_N_o_t _B_o_u_n_d)

This is like _p_r_o_c_e_s_s-_n_e_w_l_i_n_e except it sends  everything  to  the
process without the newline.  Normally, when you type return in a
process buffer  it  sends  everything  you  typed  including  the
Return.   This  command  just  provides a way to send data to the
process without having to send a newline as well.

_1_6._1_8_2.  _p_u_s_h-_s_h_e_l_l (_N_o_t _B_o_u_n_d)

This spawns a child shell and relinquishes control to  it.   This
works  on  any  version of UNIX, but this isn't as good as _p_a_u_s_e-
_j_o_v_e because it takes time to start up the new shell and you  get
a  brand  new environment every time.  To return to JOVE you type
"C-D".

_1_6._1_8_3.  _p_u_s_h_d (_N_o_t _B_o_u_n_d)

This pushes a directory onto the directory stack  and  cd's  into
it.   It asks for the directory name but if you don't specify one
it switches the top two  entries  no  the  stack.   It  purposely
behaves the same as C-shell's _p_u_s_h_d.




                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-65


_1_6._1_8_4.  _p_w_d (_N_o_t _B_o_u_n_d)

This prints the working directory.

_1_6._1_8_5.  _q_u_e_r_y-_r_e_p_l_a_c_e-_s_t_r_i_n_g (_E_S_C _Q)

This replaces the occurrences of a specified string with a speci-
fied  replacement  string.   When an occurrence is found point is
moved to it and then JOVE asks what to do.  The options are:

        Space    to replace this occurrence and go on to the next one.
        Period   to replace this occurrence and then stop.
        Rubout   to skip this occurrence and go on to the next one.
        C-R      to enter a recursive edit.  This lets you temporarily
                 suspend the replace, do some editing, and then return
                 to continue where you left off.  To continue with the
                 Query Replace type "C-X C-C" as if you were trying to
                 exit JOVE.  Normally you would but when you are in a
                 recursive edit all it does is exit that recursive
                 editing level.
        C-W      to delete the matched string and then enter a recursive
                 edit.
        U        to undo the last replacement.
        P or !   to go ahead and replace the remaining occurrences without
                 asking.
        Return   to stop the Query Replace.

The search for occurrences starts at point and goes to the end of
the  buffer, so to replace in the entire buffer you must first go
to the beginning.

_1_6._1_8_6.  _q_u_i_t-_p_r_o_c_e_s_s (_N_o_t _B_o_u_n_d)

This is the same as typing "C-\" (the Quit character) to a normal
UNIX  process, except it sends it to the current process in JOVE.
This is only for versions  of  JOVE  that  have  the  interactive
processes  feature.  This only works when you are inside a buffer
that's attached to a process.

_1_6._1_8_7.  _q_u_o_t_e_d-_i_n_s_e_r_t (_C-_Q)

This lets you insert characters that normally would  be  executed
as  other  JOVE  commands.  For example, to insert "C-F" you type
"C-Q C-F".

_1_6._1_8_8.  _r_e_a_d-_w_o_r_d-_a_b_b_r_e_v-_f_i_l_e (_N_o_t _B_o_u_n_d)

This reads a specified file that contains a bunch of abbreviation
definitions,  and  makes  those  abbreviations available.  If the
selected buffer is not already in Word Abbrev mode  this  command
puts it in that mode.






                           May 2, 1988





USD:17-66                              JOVE Manual for UNIX Users


_1_6._1_8_9.  _r_e_c_u_r_s_i_v_e-_e_d_i_t (_N_o_t _B_o_u_n_d)

This enters a recursive editing level.  This  isn't  really  very
useful.  I don't know why it's available for public use.  I think
I'll delete it some day.

_1_6._1_9_0.  _r_e_d_r_a_w-_d_i_s_p_l_a_y (_C-_L)

This centers the line containing point in the  window.   If  that
line  is  already  in  the middle the window is first cleared and
then redrawn.  If a numeric argument is  supplied,  the  line  is
positioned  at that offset from the top of the window.  For exam-
ple, "ESC 0 C-L" positions the line containing point at  the  top
of the window.

_1_6._1_9_1.  _r_e_n_a_m_e-_b_u_f_f_e_r (_N_o_t _B_o_u_n_d)

This lets you rename the current buffer.

_1_6._1_9_2.  _r_e_p_l_a_c_e-_i_n-_r_e_g_i_o_n (_N_o_t _B_o_u_n_d)

This is the same as _r_e_p_l_a_c_e-_s_t_r_i_n_g except that it  is  restricted
to occurrences between Point and Mark.

_1_6._1_9_3.  _r_e_p_l_a_c_e-_s_t_r_i_n_g (_E_S_C _R)

This replaces all occurrences of a specified string with a speci-
fied  replacement string.  This is just like _q_u_e_r_y-_r_e_p_l_a_c_e-_s_t_r_i_n_g
except it replaces without asking.

_1_6._1_9_4.  _r_i_g_h_t-_m_a_r_g_i_n (_v_a_r_i_a_b_l_e)

Where the right margin is for _A_u_t_o _F_i_l_l  mode  and  the  _j_u_s_t_i_f_y-
_p_a_r_a_g_r_a_p_h and _j_u_s_t_i_f_y-_r_e_g_i_o_n commands.  The default is 78.

_1_6._1_9_5.  _r_i_g_h_t-_m_a_r_g_i_n-_h_e_r_e (_N_o_t _B_o_u_n_d)

This sets the _r_i_g_h_t-_m_a_r_g_i_n variable to the  current  position  of
point.   This is an easy way to say, "Make the right margin begin
here," without having to count the number of spaces over it actu-
ally is.

_1_6._1_9_6.  _s_a_v_e-_f_i_l_e (_C-_X _C-_S)

This saves the current buffer to the associated file.  This makes
your  changes permanent so you should be sure you really want to.
If the buffer has not been modified _s_a_v_e-_f_i_l_e refuses to  do  the
save.   If  you really do want to write the file you can use "C-X
C-W" which executes _w_r_i_t_e-_f_i_l_e.

_1_6._1_9_7.  _s_c_r_o_l_l-_a_l_l-_l_i_n_e_s (_v_a_r_i_a_b_l_e)

When this is turned on, the entire window will be  scrolled  left
or  right  when  the  current line scrolls.  The default value is



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-67


OFF, which will cause JOVE to behave in the familiar way,  namely
to scroll only the current line.

_1_6._1_9_8.  _s_c_r_o_l_l-_d_o_w_n (_E_S_C _Z)

This scrolls the screen one line down.  If  the  line  containing
point  moves  past  the bottom of the window point is moved up to
the center of the window.  If a numeric argument is supplied that
many  lines  are scrolled; if the argument is negative the screen
is scrolled up instead.

_1_6._1_9_9.  _s_c_r_o_l_l-_l_e_f_t (_N_o_t _B_o_u_n_d)

This scrolls the text in the current window  10  character  posi-
tions  to  the left.  If a numeric argument is specified then the
text is scrolled that number  of  character  positions.   If  the
variable  _s_c_r_o_l_l-_a_l_l-_l_i_n_e_s is ON then _s_c_r_o_l_l-_l_e_f_t may actually do
nothing if the scrolling would cause Point not to be visible.

_1_6._2_0_0.  _s_c_r_o_l_l-_n_e_x_t-_p_a_g_e (_N_o_t _B_o_u_n_d)

This continuously scrolls up screen-full lines (PC version only).

_1_6._2_0_1.  _s_c_r_o_l_l-_p_r_e_v_i_o_u_s-_p_a_g_e (_N_o_t _B_o_u_n_d)

This continuously scrolls  down  screen-full  lines  (PC  version
only).

_1_6._2_0_2.  _s_c_r_o_l_l-_r_i_g_h_t (_N_o_t _B_o_u_n_d)

This scrolls the text in the current window  10  character  posi-
tions  to the right.  If a numeric argument is specified then the
text is scrolled that number  of  character  positions.   If  the
variable _s_c_r_o_l_l-_a_l_l-_l_i_n_e_s is ON then _s_c_r_o_l_l-_r_i_g_h_t may actually do
nothing if the scrolling would cause Point not to be visible.

_1_6._2_0_3.  _s_c_r_o_l_l-_s_t_e_p (_v_a_r_i_a_b_l_e)

How many lines should be scrolled if the _p_r_e_v_i_o_u_s-_l_i_n_e  or  _n_e_x_t-
_l_i_n_e  commands move you off the top or bottom of the screen.  You
may wish to decrease this variable if you are on a slow terminal.
The default value is 0, which means to center the current line in
the window.  If the value is negative, the behavior  is  slightly
different.   If  you  move off the top of the window, and _s_c_r_o_l_l-
_s_t_e_p is, say, -5 then the new line will be displayed 5 lines from
the bottom of the window.  If you move off the bottom of the win-
dow, the new line will be positioned 5 lines from the top of  the
window.

_1_6._2_0_4.  _s_c_r_o_l_l-_u_p (_C-_Z)

This scrolls the screen one line  up.   If  the  line  containing
point moves past the top of the window point is moved down to the
center of the window.  If a numeric  argument  is  supplied  that



                           May 2, 1988





USD:17-68                              JOVE Manual for UNIX Users


many  lines  are scrolled; if the argument is negative the screen
is scrolled down instead.

_1_6._2_0_5.  _s_e_a_r_c_h-_e_x_i_t-_c_h_a_r (_v_a_r_i_a_b_l_e)

Set this to the character you want to  use  to  exit  incremental
search.   The default is Newline, which makes i-search compatible
with normal string search.

_1_6._2_0_6.  _s_e_a_r_c_h-_f_o_r_w_a_r_d (_C-_S)

This searches forward for a specified search string and positions
point  at  the end of the string if it's found.  If the string is
not found point remains unchanged.  This searches from  point  to
the  end  of  the  buffer,  so  any  matches before point will be
missed.

_1_6._2_0_7.  _s_e_a_r_c_h-_f_o_r_w_a_r_d-_n_d (_N_o_t _B_o_u_n_d)

This is just like _s_e_a_r_c_h-_f_o_r_w_a_r_d except that it doesn't assume  a
default  search  string,  and  it  doesn't set the default search
string.  This is useful for defining macros,  when  you  want  to
search for something, but you don't want it to affect the current
default search string.

_1_6._2_0_8.  _s_e_a_r_c_h-_r_e_v_e_r_s_e (_C-_R)

This searches backward for a specified search  string  and  posi-
tions point at the beginning if the string if it's found.  If the
string is not found point remains unchanged.  This searches  from
point  to the beginning of the buffer, so any matches after point
will be missed.

_1_6._2_0_9.  _s_e_a_r_c_h-_r_e_v_e_r_s_e-_n_d (_N_o_t _B_o_u_n_d)

This is just like _s_e_a_r_c_h-_r_e_v_e_r_s_e except that it doesn't assume  a
default  search  string,  and  it  doesn't set the default search
string.  This is useful for defining macros,  when  you  want  to
search for something, but you don't want it to affect the current
default search string.

_1_6._2_1_0.  _s_e_l_e_c_t-_b_u_f_f_e_r (_C-_X _B)

This selects a new or  already  existing  buffer  making  it  the
current  one.  You can type either the buffer name or number.  If
you type in the name you need only type  the  name  until  it  is
unambiguous,  at which point typing Escape or Space will complete
it for you.  If you want to create a  new  buffer  you  can  type
Return instead of Space, and a new empty buffer will be created.

_1_6._2_1_1.  _s_e_l_e_c_t-_b_u_f_f_e_r-_1 (<_A_l_t>-_1)

This selects buffer number 1, if it exists (PC version only).




                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-69


_1_6._2_1_2.  _s_e_l_e_c_t-_b_u_f_f_e_r-_2 (<_A_l_t>-_2)

This selects buffer number 2, if it exists (PC version only).

_1_6._2_1_3.  _s_e_l_e_c_t-_b_u_f_f_e_r-_3 (<_A_l_t>-_3)

This selects buffer number 3, if it exists (PC version only).

_1_6._2_1_4.  _s_e_l_e_c_t-_b_u_f_f_e_r-_4 (<_A_l_t>-_4)

This selects buffer number 4, if it exists (PC version only).

_1_6._2_1_5.  _s_e_l_e_c_t-_b_u_f_f_e_r-_5 (<_A_l_t>-_5)

This selects buffer number 5, if it exists (PC version only).

_1_6._2_1_6.  _s_e_l_e_c_t-_b_u_f_f_e_r-_6 (<_A_l_t>-_6)

This selects buffer number 6, if it exists (PC version only).

_1_6._2_1_7.  _s_e_l_e_c_t-_b_u_f_f_e_r-_7 (<_A_l_t>-_7)

This selects buffer number 7, if it exists (PC version only).

_1_6._2_1_8.  _s_e_l_e_c_t-_b_u_f_f_e_r-_8 (<_A_l_t>-_8)

This selects buffer number 8, if it exists (PC version only).

_1_6._2_1_9.  _s_e_l_e_c_t-_b_u_f_f_e_r-_9 (<_A_l_t>-_9)

This selects buffer number 9, if it exists (PC version only).

_1_6._2_2_0.  _s_e_l_f-_i_n_s_e_r_t (_M_o_s_t _P_r_i_n_t_i_n_g _C_h_a_r_a_c_t_e_r_s)

This inserts the character that invoked it  into  the  buffer  at
point.   Initially  all  but a few of the printing characters are
bound to _s_e_l_f-_i_n_s_e_r_t.

_1_6._2_2_1.  _s_e_n_d-_t_y_p_e_o_u_t-_t_o-_b_u_f_f_e_r (_v_a_r_i_a_b_l_e)

When this is set JOVE will send output that  normally  overwrites
the  screen (temporarily) to a buffer instead.  This affects com-
mands like _l_i_s_t-_b_u_f_f_e_r_s, _l_i_s_t-_p_r_o_c_e_s_s_e_s, and  commands  that  use
completion.  The default value is "off".

_1_6._2_2_2.  _s_e_t (_N_o_t _B_o_u_n_d)

This gives a specified variable a new value.  Occasionally you'll
see  lines  like  "set  this  variable to that value to do this".
Well, you use the _s_e_t command to do that.

_1_6._2_2_3.  _s_e_t-_m_a_r_k (_C-@)

This sets the mark at the current position  in  the  buffer.   It



                           May 2, 1988





USD:17-70                              JOVE Manual for UNIX Users


prints  the  message "Point pushed" on the message line.  It says
that instead of "Mark set" because when you set the mark the pre-
vious  mark is still remembered on a ring of 16 marks.  So "Point
pushed" means point is pushed onto the ring of marks and  becomes
the  value  of  "the  mark".  To go through the ring of marks you
type "C-U C-@", or execute the _p_o_p-_m_a_r_k  command.   If  you  type
this enough times you will get back to where you started.

_1_6._2_2_4.  _s_h_e_l_l (_v_a_r_i_a_b_l_e)

The shell to be used with all the  shell  commands  command.   If
your  SHELL  environment variable is set, it is used as the value
of _s_h_e_l_l; otherwise "/bin/csh" is the default.

_1_6._2_2_5.  _s_h_e_l_l (_N_o_t _B_o_u_n_d)

This starts up an interactive  shell  in  a  window.   JOVE  uses
"*shell*"  as  the  name  of  the buffer in which the interacting
takes place.  See the  manual  for  information  on  how  to  use
interactive processes.

_1_6._2_2_6.  _s_h_e_l_l-_c_o_m_m_a_n_d (_C-_X !)

This runs a UNIX command and places the output from that  command
in  a buffer.  JOVE creates a buffer that matches the name of the
command you specify and then attaches that buffer  to  a  window.
So, when you have only one window running this command will cause
JOVE to split the window and attach the new buffer to  that  win-
dow.   Otherwise, JOVE finds the most convenient of the available
windows and uses that one instead.  If the buffer already  exists
it is first emptied, except that if it's holding a file, not some
output from a previous command, JOVE prints an error message  and
refuses  to  execute  the command.  If you really want to execute
the command you should delete that buffer (saving  it  first,  if
you like) or use _s_h_e_l_l-_c_o_m_m_a_n_d-_t_o-_b_u_f_f_e_r, and try again.

_1_6._2_2_7.  _s_h_e_l_l-_c_o_m_m_a_n_d-_n_o-_b_u_f_f_e_r (_N_o_t _B_o_u_n_d)

This is just like _s_h_e_l_l-_c_o_m_m_a_n_d except it just runs  the  command
without saving the output to any buffer.  It will report the suc-
cess of the command in the usual way.

_1_6._2_2_8.  _s_h_e_l_l-_c_o_m_m_a_n_d-_t_o-_b_u_f_f_e_r (_N_o_t _B_o_u_n_d)

This is just like _s_h_e_l_l-_c_o_m_m_a_n_d except it lets  you  specify  the
buffer to use instead of JOVE.

_1_6._2_2_9.  _s_h_e_l_l-_c_o_m_m_a_n_d-_w_i_t_h-_t_y_p_e_o_u_t (_N_o_t _B_o_u_n_d)

This is just like _s_h_e_l_l-_c_o_m_m_a_n_d except that instead of saving the
output  to  a  buffer,  and  displaying it in a window, this just
types out the output in the  same  way  that  _l_i_s_t-_b_u_f_f_e_r_s  does.
Actually,  how  this behaves depends on the value of the variable
_s_e_n_d-_t_y_p_e_o_u_t-_t_o-_b_u_f_f_e_r.  If it  is  on  then  shell-command-with-



                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-71


typeout will behave just like _s_h_e_l_l-_c_o_m_m_a_n_d.

_1_6._2_3_0.  _s_h_e_l_l-_f_l_a_g_s (_v_a_r_i_a_b_l_e)

This defines the flags that are passed to  shell  commands.   The
default  is  "-c".   See the _s_h_e_l_l variable to change the default
shell.

_1_6._2_3_1.  _s_h_o_w-_m_a_t_c_h-_m_o_d_e (_N_o_t _B_o_u_n_d)

This turns on Show Match mode (or off if it's  currently  on)  in
the  selected buffer.  This changes "}" and ")" so that when they
are typed the are inserted as usual, and then the cursor  flashes
back to the matching "{" or "(" (depending on what was typed) for
about half a second, and then goes back to just after the "}"  or
")"  that invoked the command.  This is useful for typing in com-
plicated expressions in a program.  You can change how  long  the
cursor  sits  on  the matching paren by setting the "paren-flash-
delay" variable in tenths of a second.  If the  matching  "{"  or
"(" isn't visible nothing happens.

_1_6._2_3_2.  _s_h_r_i_n_k-_w_i_n_d_o_w (_N_o_t _B_o_u_n_d)

This makes the current window  one  line  shorter,  if  possible.
Windows  must  be at least 2 lines high, one for the text and the
other for the mode line.

_1_6._2_3_3.  _s_o_u_r_c_e (_N_o_t _B_o_u_n_d)

This reads a bunch of JOVE commands from a file.  The  format  of
the  file  is  the same as that in your initialization file (your
".joverc") in your main directory.  There should be  one  command
per  line  and  it should be as though you typed "ESC X" while in
JOVE.  For example, here's part of my initialization file:

        bind-to-key i-search-reverse ^R
        bind-to-key i-search-forward ^S
        bind-to-key pause-jove ^[S

What they do is make "C-R" call the _i-_s_e_a_r_c_h-_r_e_v_e_r_s_e command  and
"C-S" call _i-_s_e_a_r_c_h-_f_o_r_w_a_r_d and "ESC S" call _p_a_u_s_e-_j_o_v_e.

_1_6._2_3_4.  _s_p_e_l_l-_b_u_f_f_e_r (_N_o_t _B_o_u_n_d)

This runs the current buffer through the UNIX _s_p_e_l_l  program  and
places the output in buffer "Spell".  Then JOVE lets you edit the
list of words, expecting you to delete the ones  that  you  don't
care  about, i.e., the ones you know are spelled correctly.  Then
the _p_a_r_s_e-_s_p_e_l_l_i_n_g-_e_r_r_o_r_s-_i_n-_b_u_f_f_e_r command comes along and finds
all the misspelled words and sets things up so the error commands
work.






                           May 2, 1988





USD:17-72                              JOVE Manual for UNIX Users


_1_6._2_3_5.  _s_p_l_i_t-_c_u_r_r_e_n_t-_w_i_n_d_o_w (_C-_X _2)

This splits the current window into two  equal  parts  (providing
the  resulting  windows  would  be  big  enough) and displays the
selected buffer in both windows.  Use "C-X 1" to  go  back  to  1
window  mode.   If  a numeric argument is supplied, the window is
split "evenly" that many times (when possible).

_1_6._2_3_6.  _s_t_a_r_t-_r_e_m_e_m_b_e_r_i_n_g (_C-_X ()

This is just another name for the _b_e_g_i_n-_k_b_d-_m_a_c_r_o  name.   It  is
included for backward compatibility.

_1_6._2_3_7.  _s_t_o_p-_r_e_m_e_m_b_e_r_i_n_g (_C-_X ))

This is just another name for the _e_n_d-_k_b_d-_m_a_c_r_o command.   It  is
included for backward compatibility.

_1_6._2_3_8.  _s_t_o_p-_p_r_o_c_e_s_s (_N_o_t _B_o_u_n_d)

This sends a stop signal (C-Z, for most people)  to  the  current
process.   It  only  works  if  you  have the interactive process
feature, and you are in a buffer attached to a process.

_1_6._2_3_9.  _s_t_r_i_n_g-_l_e_n_g_t_h (_N_o_t _B_o_u_n_d)

This prints the number of characters in  the  string  that  point
sits  in.   Strings  are surrounded by double quotes.  JOVE knows
that "\007" is considered a single character, namely  "C-G",  and
also  knows  about other common ones, like "\r" (Return) and "\n"
(LineFeed).  This is mostly useful only for C programmers.

_1_6._2_4_0.  _s_u_s_p_e_n_d-_j_o_v_e (_E_S_C _S)

This is a synonym for _p_a_u_s_e-_j_o_v_e.

_1_6._2_4_1.  _s_y_n_c-_f_r_e_q_u_e_n_c_y (_v_a_r_i_a_b_l_e)

The temporary files used by JOVE are forced  out  to  disk  every
_s_y_n_c-_f_r_e_q_u_e_n_c_y  modifications.   The  default is 50, which really
makes good sense.  Unless your system is very unstable, you prob-
ably shouldn't fool with this.

_1_6._2_4_2.  _t_a_g-_f_i_l_e (_v_a_r_i_a_b_l_e)

This the name of the file in which JOVE should look up tag defin-
itions.  The default value is "./tags".

_1_6._2_4_3.  _t_e_x_t-_m_o_d_e (_N_o_t _B_o_u_n_d)

This sets the major mode to Text.  Currently the other modes  are
Fundamental, C and Lisp mode.





                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-73


_1_6._2_4_4.  _t_m_p-_f_i_l_e-_p_a_t_h_n_a_m_e (_v_a_r_i_a_b_l_e)

This tells JOVE where to put the tmp files, which is  where  JOVE
stores  buffers  internally.  The default is usually in /tmp, but
if you want to store them somewhere else, you can set this  vari-
able.   If  your  system crashes a lot it might be a good idea to
set this variable to somewhere other than /tmp because the system
removes  all  the files in /tmp upon reboot, and so you would not
be able to recover editor buffers using the "jove -r" command.

NOTE: In order for this to work correctly you must set this vari-
able  BEFORE JOVE creates the tmp file.  You can set this in your
.joverc (the closer to tbe beginning the better), or as  soon  as
you start up JOVE before you visit any files.

_1_6._2_4_5.  _t_r_a_n_s_p_o_s_e-_c_h_a_r_a_c_t_e_r_s (_C-_T)

This switches the character  before  point  with  the  one  after
point,  and  then  moves  forward  one.  This doesn't work at the
beginning of the line, and at the end of the line it switches the
two  characters  before  point.  Since point is moved forward, so
that the character that was before point is still  before  point,
you  can use "C-T" to drag a character down the length of a line.
This command pretty quickly becomes very useful.

_1_6._2_4_6.  _t_r_a_n_s_p_o_s_e-_l_i_n_e_s (_C-_X _C-_T)

This switches the current line with the one above  it,  and  then
moves  down  one  so  that the line that was above point is still
above point.  This, like _t_r_a_n_s_p_o_s_e-_c_h_a_r_a_c_t_e_r_s,  can  be  used  to
drag a line down a page.

_1_6._2_4_7.  _u_n_b_i_n_d-_k_e_y (_N_o_t _B_o_u_n_d)

Use this to unbind _a_n_y key sequence.  You can use this to  unbind
even  a  prefix command, since this command does not use "key-map
completion".  For example, "ESC X unbind-key ESC ["  unbinds  the
sequence "ESC [".  This is useful for "turning off" something set
in the system-wide ".joverc" file.

_1_6._2_4_8.  _u_p_d_a_t_e-_t_i_m_e-_f_r_e_q_u_e_n_c_y (_v_a_r_i_a_b_l_e)

How often the mode line is updated (and thus the  time  and  load
average, if you display them).  The default is 30 seconds.

_1_6._2_4_9.  _u_s_e-_i/_d-_c_h_a_r (_v_a_r_i_a_b_l_e)

If your terminal has insert/delete character capability  you  can
tell  JOVE not to use it by setting this to "off".  In my opinion
it is only worth using insert/delete character at low baud rates.
WARNING:  if you set this to "on" when your terminal doesn't have
insert/delete character capability, you will get  weird  (perhaps
fatal) results.




                           May 2, 1988





USD:17-74                              JOVE Manual for UNIX Users


_1_6._2_5_0.  _v_e_r_s_i_o_n (_N_o_t _B_o_u_n_d)

Displays the version number of this JOVE.

_1_6._2_5_1.  _v_i_s_i_b_l_e-_b_e_l_l (_v_a_r_i_a_b_l_e)

Use the terminal's visible bell instead of beeping.  This is  set
automatically if your terminal has the capability.

_1_6._2_5_2.  _v_i_s_i_b_l_e-_s_p_a_c_e_s-_i_n-_w_i_n_d_o_w (_N_o_t _B_o_u_n_d)

This displays an underscore character instead of  each  space  in
the  window  and  displays  a greater-than followed by spaces for
each tab in the window.  The actual text in  the  buffer  is  not
changed;  only  the screen display is affected.  To turn this off
you run the command again; it toggles.

_1_6._2_5_3.  _v_i_s_i_t-_f_i_l_e (_C-_X _C-_V)

This reads a specified file into the current buffer replacing the
old  text.  If the buffer needs saving JOVE will offer to save it
for you.  Sometimes you use this to start over, say if  you  make
lots  of  changes  and then change your mind.  If that's the case
you don't want JOVE to save your buffer and you  answer  "NO"  to
the question.

_1_6._2_5_4.  _w_i_n_d_o_w-_f_i_n_d (_C-_X _4)

This lets you select another buffer in another window three  dif-
ferent  ways.   This waits for another character which can be one
of the following:

        T    Finds a tag in the other window.
        F    Finds a file in the other window.
        B    Selects a buffer in the other window.

This is just a convenient short hand for "C-X 2" (or "C-X  O"  if
there  are  already  two  windows)  followed  by  the appropriate
sequence for invoking each command.   With  this,  though,  there
isn't  the  extra  overhead of having to redisplay.  In addition,
you don't have to decide whether to type "C-X 2" or "C-X O" since
"C-X 4" does the right thing.

_1_6._2_5_5.  _w_o_r_d-_a_b_b_r_e_v-_m_o_d_e (_N_o_t _B_o_u_n_d)

This turns on Word Abbrev mode (or off if it's currently  on)  in
the  selected  buffer.   Word Abbrev mode lets you specify a word
(an abbreviation) and a phrase with which JOVE should  substitute
the  abbreviation.   You  can  use this to define words to expand
into long phrases, e.g., "jove" can expand into  "Jonathan's  Own
Version  of Emacs"; another common use is defining words that you
often misspell in the same way, e.g., "thier" => "their" or "teh"
=> "the".  See the information on the _a_u_t_o-_c_a_s_e-_a_b_b_r_e_v variable.




                           May 2, 1988





JOVE Manual for UNIX Users                              USD:17-75


There are two kinds of abbreviations: mode specific  and  global.
If  you  define  a  Mode specific abbreviation in C mode, it will
expand only in buffers that are in C mode.  This is  so  you  can
have  the  same abbreviation expand to different things depending
on your context.  Global abbreviations expand regardless  of  the
major  mode  of the buffer.  The way it works is this: JOVE looks
first in the mode specific table, and then in the  global  table.
Whichever  it  finds  it  in  first is the one that's used in the
expansion.  If it doesn't find the word  it  is  left  untouched.
JOVE  tries  to  expand  words as they are typed, when you type a
punctuation character or Space or Return.  If  you  are  in  Auto
Fill  mode  the expansion will be filled as if you typed it your-
self.

_1_6._2_5_6.  _w_r_a_p-_s_e_a_r_c_h (_v_a_r_i_a_b_l_e)

If set, searches will  "wrap  around"  the  ends  of  the  buffer
instead of stopping at the bottom or top.  The default is "off".

_1_6._2_5_7.  _w_r_i_t_e-_f_i_l_e (_C-_X _C-_W)

This saves the current buffer to a specified file, and then makes
that  file the default file name for this buffer.  If you specify
a file that already exists you are asked to confirm  over-writing
it.

_1_6._2_5_8.  _w_r_i_t_e-_f_i_l_e_s-_o_n-_m_a_k_e (_v_a_r_i_a_b_l_e)

When set, all modified files will be written out  before  calling
make  when  the  _c_o_m_p_i_l_e-_i_t  command is executed.  The default is
"on".

_1_6._2_5_9.  _w_r_i_t_e-_m_a_c_r_o_s-_t_o-_f_i_l_e (_N_o_t _B_o_u_n_d)

This writes the currently defined macros to a specified file in a
format  appropriate for reading them back in with the _s_o_u_r_c_e com-
mand.  The purpose of this command is to allow you to define mac-
ros once and use them in other instances of JOVE.

_1_6._2_6_0.  _w_r_i_t_e-_m_o_d_i_f_i_e_d-_f_i_l_e_s (_C-_X _C-_M)

This saves all the buffers that need saving.   If  you  supply  a
numeric  argument it asks for each buffer whether you really want
to save it.

_1_6._2_6_1.  _w_r_i_t_e-_r_e_g_i_o_n (_N_o_t _B_o_u_n_d)

This writes the text in the region to a specified file.   If  the
file already exists you are asked to confirm over-writing it.

_1_6._2_6_2.  _w_r_i_t_e-_w_o_r_d-_a_b_b_r_e_v-_f_i_l_e (_N_o_t _B_o_u_n_d)

This writes the currently defined abbreviations  to  a  specified
file.   They  can  be read back in and automatically defined with



                           May 2, 1988





USD:17-76                              JOVE Manual for UNIX Users


_r_e_a_d-_w_o_r_d-_a_b_b_r_e_v-_f_i_l_e.

_1_6._2_6_3.  _y_a_n_k (_C-_Y)

This undoes the last kill  command.   That  is,  it  inserts  the
killed  text  at  point.  When you do multiple kill commands in a
row, they are merged so that yanking them back with  "C-Y"  yanks
back all of them.

_1_6._2_6_4.  _y_a_n_k-_p_o_p (_E_S_C _Y)

This yanks back previous killed text.  JOVE has a  kill  ring  on
which  the  last  10  kills are stored.  _y_a_n_k yanks a copy of the
text at the front of the ring.  If you want one of the  last  ten
kills you use "ESC Y" which rotates the ring so another different
entry is now at the front.  You can use "ESC Y" only  immediately
following  a  "C-Y" or another "ESC Y".  If you supply a negative
numeric argument the ring is rotated the other way.  If  you  use
this  command  enough times in a row you will eventually get back
to where you started.  Experiment with this.  It's extremely use-
ful.




































                           May 2, 1988