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     Elvis 1.4      DIFFERENCES BETWEEN ELVIS & BSD VI/EX       Page 7-1


E7.  DIFFERENCES BETWEEN ELVIS & BSD VI/EXF


   E7.1  ExtensionsF

   :mkexrc
   :mk

        This  EX  command saves the current :set and :map configurations
     in the ".exrc" file in your current directory.  

   :Next
   :previous
   :N
   :pre

        These commands move backwards through the args list.  

   zz

        In visual command mode, the (lowercase) "zz" command will center 
     the current line on the screen, like "z=".  

   .

        The default count value for  .  is  the  same  as  the  previous
     command which  . is meant to repeat.  However, you can supply a new
     count if you wish.  For example, after "3dw",  "."  will  delete  3
     words, but "5." will delete 5 words.  

   ".

        The  text  which was most recently input (via a "cw" command, or
     something similar) is saved in a cut buffer called ". (which  is  a
     pretty hard name to write in an English sentence).  

   K

        In  visual command mode, you can move the cursor onto a word and
     press shift-K to have Elvis run a reference program  to  look  that
     word up.   This command alone is worth the price of admission!  See
     the ctags and ref programs.  

   #

        In visual command mode, you can move the cursor  onto  a  number
     and then  hit ## or #+ to increment that number by 1.  To increment
     it by a larger amount, type in the increment value  before  hitting
     the initial  #.    The  number  can  also  be decremented or set by
     hitting #- or #=, respectively.  

   input

        You can backspace past the beginning of the line.  









     Elvis 1.4      DIFFERENCES BETWEEN ELVIS & BSD VI/EX       Page 7-2


        The arrow keys work in input mode.  

        If you type control-A, then the text that you input last time is 
     inserted.  You will remain in input mode, so you can backspace over 
     part of it, or add more to it.  (This is sort of like control-@  on
     the real vi, except that control-A really works.) 

        Control-P will insert the contents of the cut buffer.  

        Real  vi  can  only  remember up to 128 characters of input, but
     Elvis can remember any amount.  

        The ^T and ^D keys can adjust the indent of  a  line  no  matter
     where the cursor happens to be in that line.  

        You  can  save your file and exit Elvis directly from input mode
     by hitting control-Z twice.  

        Elvis supports digraphs as a way to enter non-ASCII characters.  

   :set inputmode
   :se im

        If you set this flag in your .exrc file, then elvis  will  start
     up in input mode instead of visual command mode.  

   :set charattr
   :se ca

        Elvis  can  display  "backslash-f" style character attributes on
     the screen as you edit.  The following example shows the recognized 
     atributes: 

            normal \fBboldface\fR \fIitalics\fR \fUunderlined\fR normal

        NOTE: you must compile elvis without the -DNO_CHARATTR flag  for
     this to work.  

   :set sync
   :se sy

        After  a  crash, you can usually recover the altered form of the
     file from the temporary file that Elvis uses.  With the sync option 
     turned on, the odds are shifted a little more in your favor because 
     Elvis will perform a sync() call after each change has been written 
     to the temporary file.  

   cursor shape

        Elvis changes the shape of the cursor  to  indicate  which  mode
     you're  in, if your terminal's termcap entry includes the necessary
     capabilities.  

   :set hideformat
   :se hf








     Elvis 1.4      DIFFERENCES BETWEEN ELVIS & BSD VI/EX       Page 7-3


        This option hides format control lines.  (They are displayed  on
     the screen as blank lines.) 

   :errlist
   *
   elvis -m

        Elvis  is  clever  enough to parse the error messages emitted by
     many compilers.  To use  this  feature,  you  should  collect  your
     compiler's  error messages into a file called "errlist"; elvis will
     read this file,  determine  which  source  file  caused  the  error
     messages,  start  editing  that  file,  move the cursor to the line
     where the error was detected, and display the error message on  the
     status line.  Nifty!  


   E7.2  OmissionsF

        The replace  mode  is  a hack.  It doesn't save the text that it
     overwrites.  

        Long lines are displayed differently -- where the real vi  would
     wrap  a  long  line  onto  several rows of the screen, Elvis simply
     displays part of the line, and allows  you  to  scroll  the  screen
     sideways to see the rest of it.  

        The ":preserve"  and ":recover" commands are missing.  So is the
     -r flag.  I've never had a good  reason  to  use  ":preserve",  and
     since  ":recover"  is used so rarely I decided to implement it as a
     separate program.  There's no need to load the recovery  code  into
     memory every time you edit a file, I figured.  

        LISP support is missing.  

        Due  to  naming  conventions used for the temporary files, Elvis
     can be creating no more that one new  file  per  directory  at  any
     given time.  Any number of existing files can be edited at the same 
     time on multitasking computer systems, but only one new file can be 
     created simultaneously per directory.  To relieve this problem, you 
     would have to edit tmp.c and virec.c This is expected to be done in 
     version 1.5 

        Autoindent mode acts a little different from the real vi.  It is 
     still  quite  useful,  but  if you frequently use both vi and elvis
     then the differences may be  annoying.    Autoindent  is  -1gradually-0
     improving.  

        The  visual  "put"  command  cannot be repeated by hitting the .
     key.  

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