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Annotation of coherent/d/usr/bin/elvis/doc/differ.doc, revision 1.1

1.1     ! root        1: 
        !             2:      Elvis 1.4      DIFFERENCES BETWEEN ELVIS & BSD VI/EX       Page 7-1
        !             3: 
        !             4: 
        !             5: E7.  DIFFERENCES BETWEEN ELVIS & BSD VI/EXF
        !             6: 
        !             7: 
        !             8:    E7.1  ExtensionsF
        !             9: 
        !            10:    :mkexrc
        !            11:    :mk
        !            12: 
        !            13:         This  EX  command saves the current :set and :map configurations
        !            14:      in the ".exrc" file in your current directory.  
        !            15: 
        !            16:    :Next
        !            17:    :previous
        !            18:    :N
        !            19:    :pre
        !            20: 
        !            21:         These commands move backwards through the args list.  
        !            22: 
        !            23:    zz
        !            24: 
        !            25:         In visual command mode, the (lowercase) "zz" command will center 
        !            26:      the current line on the screen, like "z=".  
        !            27: 
        !            28:    .
        !            29: 
        !            30:         The default count value for  .  is  the  same  as  the  previous
        !            31:      command which  . is meant to repeat.  However, you can supply a new
        !            32:      count if you wish.  For example, after "3dw",  "."  will  delete  3
        !            33:      words, but "5." will delete 5 words.  
        !            34: 
        !            35:    ".
        !            36: 
        !            37:         The  text  which was most recently input (via a "cw" command, or
        !            38:      something similar) is saved in a cut buffer called ". (which  is  a
        !            39:      pretty hard name to write in an English sentence).  
        !            40: 
        !            41:    K
        !            42: 
        !            43:         In  visual command mode, you can move the cursor onto a word and
        !            44:      press shift-K to have Elvis run a reference program  to  look  that
        !            45:      word up.   This command alone is worth the price of admission!  See
        !            46:      the ctags and ref programs.  
        !            47: 
        !            48:    #
        !            49: 
        !            50:         In visual command mode, you can move the cursor  onto  a  number
        !            51:      and then  hit ## or #+ to increment that number by 1.  To increment
        !            52:      it by a larger amount, type in the increment value  before  hitting
        !            53:      the initial  #.    The  number  can  also  be decremented or set by
        !            54:      hitting #- or #=, respectively.  
        !            55: 
        !            56:    input
        !            57: 
        !            58:         You can backspace past the beginning of the line.  
        !            59: 
        !            60: 
        !            61: 
        !            62: 
        !            63: 
        !            64: 
        !            65: 
        !            66: 
        !            67: 
        !            68:      Elvis 1.4      DIFFERENCES BETWEEN ELVIS & BSD VI/EX       Page 7-2
        !            69: 
        !            70: 
        !            71:         The arrow keys work in input mode.  
        !            72: 
        !            73:         If you type control-A, then the text that you input last time is 
        !            74:      inserted.  You will remain in input mode, so you can backspace over 
        !            75:      part of it, or add more to it.  (This is sort of like control-@  on
        !            76:      the real vi, except that control-A really works.) 
        !            77: 
        !            78:         Control-P will insert the contents of the cut buffer.  
        !            79: 
        !            80:         Real  vi  can  only  remember up to 128 characters of input, but
        !            81:      Elvis can remember any amount.  
        !            82: 
        !            83:         The ^T and ^D keys can adjust the indent of  a  line  no  matter
        !            84:      where the cursor happens to be in that line.  
        !            85: 
        !            86:         You  can  save your file and exit Elvis directly from input mode
        !            87:      by hitting control-Z twice.  
        !            88: 
        !            89:         Elvis supports digraphs as a way to enter non-ASCII characters.  
        !            90: 
        !            91:    :set inputmode
        !            92:    :se im
        !            93: 
        !            94:         If you set this flag in your .exrc file, then elvis  will  start
        !            95:      up in input mode instead of visual command mode.  
        !            96: 
        !            97:    :set charattr
        !            98:    :se ca
        !            99: 
        !           100:         Elvis  can  display  "backslash-f" style character attributes on
        !           101:      the screen as you edit.  The following example shows the recognized 
        !           102:      atributes: 
        !           103: 
        !           104:             normal \fBboldface\fR \fIitalics\fR \fUunderlined\fR normal
        !           105: 
        !           106:         NOTE: you must compile elvis without the -DNO_CHARATTR flag  for
        !           107:      this to work.  
        !           108: 
        !           109:    :set sync
        !           110:    :se sy
        !           111: 
        !           112:         After  a  crash, you can usually recover the altered form of the
        !           113:      file from the temporary file that Elvis uses.  With the sync option 
        !           114:      turned on, the odds are shifted a little more in your favor because 
        !           115:      Elvis will perform a sync() call after each change has been written 
        !           116:      to the temporary file.  
        !           117: 
        !           118:    cursor shape
        !           119: 
        !           120:         Elvis changes the shape of the cursor  to  indicate  which  mode
        !           121:      you're  in, if your terminal's termcap entry includes the necessary
        !           122:      capabilities.  
        !           123: 
        !           124:    :set hideformat
        !           125:    :se hf
        !           126: 
        !           127: 
        !           128: 
        !           129: 
        !           130: 
        !           131: 
        !           132: 
        !           133: 
        !           134:      Elvis 1.4      DIFFERENCES BETWEEN ELVIS & BSD VI/EX       Page 7-3
        !           135: 
        !           136: 
        !           137:         This option hides format control lines.  (They are displayed  on
        !           138:      the screen as blank lines.) 
        !           139: 
        !           140:    :errlist
        !           141:    *
        !           142:    elvis -m
        !           143: 
        !           144:         Elvis  is  clever  enough to parse the error messages emitted by
        !           145:      many compilers.  To use  this  feature,  you  should  collect  your
        !           146:      compiler's  error messages into a file called "errlist"; elvis will
        !           147:      read this file,  determine  which  source  file  caused  the  error
        !           148:      messages,  start  editing  that  file,  move the cursor to the line
        !           149:      where the error was detected, and display the error message on  the
        !           150:      status line.  Nifty!  
        !           151: 
        !           152: 
        !           153:    E7.2  OmissionsF
        !           154: 
        !           155:         The replace  mode  is  a hack.  It doesn't save the text that it
        !           156:      overwrites.  
        !           157: 
        !           158:         Long lines are displayed differently -- where the real vi  would
        !           159:      wrap  a  long  line  onto  several rows of the screen, Elvis simply
        !           160:      displays part of the line, and allows  you  to  scroll  the  screen
        !           161:      sideways to see the rest of it.  
        !           162: 
        !           163:         The ":preserve"  and ":recover" commands are missing.  So is the
        !           164:      -r flag.  I've never had a good  reason  to  use  ":preserve",  and
        !           165:      since  ":recover"  is used so rarely I decided to implement it as a
        !           166:      separate program.  There's no need to load the recovery  code  into
        !           167:      memory every time you edit a file, I figured.  
        !           168: 
        !           169:         LISP support is missing.  
        !           170: 
        !           171:         Due  to  naming  conventions used for the temporary files, Elvis
        !           172:      can be creating no more that one new  file  per  directory  at  any
        !           173:      given time.  Any number of existing files can be edited at the same 
        !           174:      time on multitasking computer systems, but only one new file can be 
        !           175:      created simultaneously per directory.  To relieve this problem, you 
        !           176:      would have to edit tmp.c and virec.c This is expected to be done in 
        !           177:      version 1.5 
        !           178: 
        !           179:         Autoindent mode acts a little different from the real vi.  It is 
        !           180:      still  quite  useful,  but  if you frequently use both vi and elvis
        !           181:      then the differences may be  annoying.    Autoindent  is  -1gradually-0
        !           182:      improving.  
        !           183: 
        !           184:         The  visual  "put"  command  cannot be repeated by hitting the .
        !           185:      key.  
        !           186: 
        !           187: 
        !           188: 
        !           189: 
        !           190: 
        !           191: 
        !           192: 
        !           193: 
        !           194: 
        !           195: 
        !           196: 
        !           197: 
        !           198: 

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