This is a summary of the modifications from Vim version 1.27 to version 2.0.

Incompatible changes

====================

The 'exrc' and 'secure' options are default off. If you want Vim to read a

.exrc or .vimrc in the current directory, you will have to set 'exrc' in your

global .exrc or .vimrc. People doing this are supposed to know about the

security problems, so they don't need the 'secure' option set. This is also

more vi-compatible.

Renamed quoting to visual select and swapped 'q' and 'v' keys to avoid

problems with CTRL-Q. This is also more Elvis compatible. The commands now are:

'v' start character-wise visual select

'V' start line-wise visual select

CTRL-V start block-wise visual select

'q' start recording

'Q' formatting operator

Changed CTRL-R into CTRL-Y for insert mode (copy character from line above).

This is more logical when comparing the meaning of CTRL-E and CTRL-Y in

command mode and insert mode.

Replaced CTRL-B with CTRL-R (insert contents of a register) in insert mode.

This mnemonic is more logical, because "register" is used in the documentation.

Added ":pwd" command and made ":cd" without an argument for Unix go to home

directory. This is more vi-compatible and behaves the same as the unix cd

command. The ":cd" command for MSDOS and Amiga versions is unchanged, these

machines don't have a home directory.

With the 'confirm' option to :s anything but 'y', 'n', ESC, CTRL-C or 'q' is

ignored. Nothing happens until you type a valid character. Quit substitution

with <q>, ESC and CTRL-C.

Swapped 'u' and 'U' for visual mode. 'u' makes lower case, 'U' upper. This is

more logical.

Added 'wildchar' option for filename completion. The default is <TAB> instead

of <ESC>. Most other programs use this and it avoids problems with terminal

sequences that start with <ESC> (one second wait before filename completion

starts).

Changed short name of 'showmode' option from "mo" to "smd".

Changed short name of 'modelines' from 'ml' into 'mls'. This is vi-compatible.

Changed meaning of the argument to :cf. The 'errorfile' option will now be

set to the argument.

Major improvements

==================

Added horizontal scrolling and 'wrap' option. This allows the user to choose

between line wrap (you see all the text but long lines mess up the layout)

and horizontal scrolling (correct layout but you see only a part of long

lines).

Added 'sidescroll' option. It is the number of columns to jump when the

cursor gets off of the screen while the 'wrap' option is off. The default is

0, which means that the cursor is centered on the screen. Set it to a small

number if you have fast screen I/O.

Wildcard expansion has been made more compatible with other programs. Added

'wildchar' option; default is <TAB> instead of <ESC>. With multiple matches

first match is inserted. CTRL-A inserts all matches. With CTRL-D command: If

file is a dir '/' is added. WILD_CARDS code now always included, no

compile-time option anymore. 'wildchar' is only recognized when typed, not in

a macro (prevents problems with macros containing TABs).

CTRL-L on commandline inserts longest common part of filename completion. Now

you can choose between using TAB (or 'wildchar') for getting the first match

or CTRL-L for getting the longest match.

Added automatic textmode (lines ending in CR-LF instead of LF) detection and

'textauto' option. This works when starting to edit a file and when doing a

":r" command. This is useful on MS-DOS systems with a network file system and

when editing an MS-DOS floppy on Unix or Amiga. Added [(no)textmode] message

to readfile() and writeit(). Now you can see when unexpected line separators

have been detected or are being used.

Added "-b" command line option. This makes it more easy to edit binary files

without unexpected effects.

Added ":make" command, 'errorformat' option and argument to -e option. Now you

can do your compiling from within Vim and automatically jump to the line where

the error is. Can be adjusted to work with many compilers. The command to be

executed with ":make" can be set with the 'makeprg' option. '%' and '#' in

the 'makeprg' option are expanded as usual in a command line.

Added reverse insert mode, 'revins' option and CTRL-P command. Now you can

type backwards!

Added abbreviations. They work in insert mode and in command line mode, just

like Vi. Also added :iabbr, :cabbr and friends: abbreviations for command line

only or insert mode only. Added dumping of abbreviations to :mkexrc.

Added ":center" (center the lines), ":left" (left adjustment) and ":right"

(right adjustment). ":center" and ":right" use the 'textwith' option.

Added bios calls for MSDOS screen output, ansi.sys no longer required.

Screen updating much faster now and works with more video modes. Added pcansi

termcap for when not using the console.

Other improvements

==================

If 'expandtab' is set, spaces will also be used in indents.

'tabstop' maximum removed.

Digraphs also work in the command line.

Added :redo, same as CTRL-R.

Added '-x' option for the Amiga version. The current window will be used, but

shell commands are not possible. Handy when starting Vim from a mail program.

Added 'secure' option. When reset you don't get the warnings from reading a

.vimrc/.exrc file in the current directory.

Added 'exrc' option. Now you can switch the reading of ".exrc/.vimrc" off.

Added "vim:" modelines. Other vi versions allowed all ex commands in

modelines, vim only allows set commands. Use "vim:" to avoid confusion.

Optimized position of ruler and shown command.

Improved redrawing of long command lines.

Added <SC_UP> and <SC_DOWN> to command line editing. This finds the

next/previous command that starts with the text in front of the cursor.

Added CTRL-B and CTRL-E to command line editing. Go to begin/end of the

command line.

With ":w!" readonly is reset.

If possible the cursor is switched off while visual selecting. Makes it more

clear what is selected.

Format deletes blanks at end of lines. This makes it possible to use

formatting to limit the text to a certain number of columns (e.g. 80).

Modelines quits after first error. This avoids a long list of errors when

editing a text with "vi:" accidently embedded (e.g. vim.hlp).

Optimized undo for delete. Now only 2/3 of the memory used and less copying of

lines. Speed up when deleting a lot of lines in a big file.

Added :suspend, same as CTRL-Z.

Added command-line-only mapping ":cmap", insert-mode-only ":imap" and the

associated unmap and noremap commands. Now you can enter mappings for every

mode (command/insert/command-line) separately.

Changed smart-indent a little.

Now one free chunk list per allocated block in storage.c. Makes editing big

files a bit faster.

Added repeat to visual select. now you can select the same area again.

Improved showmatch() for uneven number of quotes.

Added 'paste' option. This makes it easy to swith between typing and inserting

text with a cut/paste method. Doing ":set nopaste" before ":set paste" does

not do anything.

Added sFilename: Filename without path. Mostly only the name you typed is

shown, but internally the full path name is remembered. Otherwise the ":cd"

command would mess up the real file name. Use short file name as long as :cd

not used. If one does not use :cd the short file name will be valid. This

will avoid long path names to be printed on the status line and having to

"hit return to continue". It is also better to avoid problems with some

networks where the absolute path is not valid after a while. If :cd has been

used the full path name needs to be used to get to the right file.

Changed :digraph in :digraphs. Now "digraph" and "digraphs" both work.

Added emsg2() for more informative error messages. For example: "Cannot open

<filename> for writing" with :mkexrc.

Made 'r' command use get_literal(). Now you enter the decimal code for the

replacement character with CTRL-V nnn, where nnn is any decimal number.

Added default digraphs for MSDOS.

Added 'timoutlen' option. One can set this depending on the speed of the

terminal used. Helps when cursor keys start with ESC while working on the

console: get out of insert mode fast. Or when using a terminal over a very

slow line, although you better set 'notimeout' then.

Added wildcard expansion to tags, so environment variables in the file name

get expanded.

No error message for a non-existant tags file, only for a not-found tag.

ExpandWildCards() in unix.c does not start the shell when there are no

wildcards. Speeds up editing new files.

:set can now show several values in one command, e.g. ":set columns lines".

In MSDOS use $COMSPEC to init 'shell' option.

Added 'formatprg' option for external formatting. This is the program to use

when the 'Q' command is given. If it is an empty string (which is the

default) the internal formatting is used.

Made ioctl() first in mch_get_winsize() in unix.c. The environment variables

are now only used if the ioctl() fails. This works without problems on more

systems.

Added second column number to ruler. Now you can see both the column number

in the file and on the screen.

With MSDOS also accept '/' as file name separator. Works better in combination

with 4dos.

Screen redrawn after t_tp set. You can now directly see the result of the new

colors.

Improved error handling from write() in writeit(). Made the write_buf

function to repeat write() until all characters have been written or an error

is detected. Fixes a possible problem with signals (which has never been

reported).

Workaround for cursor key that sends ^H. The televideo 925 sends codes for

cursor keys that cannot be distinguished from normal commands. At least the

backspace is working again now.

If you are using a csh use 'glob' instead of 'echo' in WildExpand in unix.c.

This makes it possible to find file names with embedded spaces. Spaces in the

entered file name are still not possible (vi can't do it either).

Call_shell() in unix.c uses fork/exec instead of system. This makes it about

twice as fast and fixes problems with special characters in the command, e.g.

"!!awk '{ print "ok" }'.

Fixed call_shell in amiga.c for space in shell option. You can now give

options to the shell command, but the name of the shell cannot contain

spaces anymore (big deal).

Warn if no inversion is possible. Poor user, now you can't use visual select.

Use termcap entries 'se' and 'so' when 'mr' or 'me' are not available. Makes

using inversion possible on more terminals.

Added 'esckeys' option. If your special keys have codes that start with an

ESC you can switch them off in insert mode. When typing ESC you will

directly exit insert mode, instead of having to wait for more characters to

find out if it might be a special key.

Added register name "% for the current file name. Handy when you want to use

the current file name in macros.

Added <"> as a name for the unnamed register. Added the use of more registers

to some commands.

Added expansion of environment variable to most string parameters. Any non-id

character can be used after the environment variable name.

Trailing '/' in 'dir' option not required.

Added [Not edited] message to ":file".

If errors occur when starting to edit a file (e.g. out of memory) the

readonly flag is set to prevent accidently overwriting the original file with

a truncated version.

Trailing spaces are removed from ":" commands (except map, abbreviate, ":s",

":g" and ":!" commands and after <|>). Useful when accidently typing a space

after a filename.

Added TIOCLGET to mch_settmode() in unix.c. Restores some terminal settings

after exiting Vim.

A "recursive mapping" followed by another "recursive mapping" would loop

very long.

Allow entering CTRL-@ in command line mode.

Added 'A' - 'Z' for helpfile pages. You can add your own pages if you like.

Display several help pages at once on a big screen.

Don't give ".vim file exists" message when recovering.

Put command line terminated with ESC in history. If you accidently try to

use ESC for wildcard completion, you can get back what you typed.

Changed display method for CTRL-D on command line. Now the redraw is done

after the whole command line has been entered. Big speed win on slow

terminals.

Don't call flushbuf() in normal() when p_sc is off (speeds up "x").

Don't redisplay in main() when there is something in the stuff buffer. Speeds

up display a bit.

:tag shows short filename. Reduces the need for "hit return to continue".

Added "#<" for command line: current filename without extension.

Changed digraphs 208 and 240. Fixed digraph 172.

In help mode the keys CTRL-B and CTRL-F go one page back or forward. With

MSDOS page-up and page-down can also be used.

Implemented the drive specifier for the :cd command on MSDOS, ":cd c:" goes

to the C drive.

Implemented FullName for msdos. Makes ":cd" really work.

When the cursor is off the screen, put it at 1/2 of the screen. Used to be 1/3

or 2/3, depending on the direction.

Bug fixes

=========

Fixed small screen updating bug in dodelete().

Inserting tab in Replace mode with 'et' option set did not delete char.

Fixed bug when start and end of operator are the same, e.g. "^d^".

Fixed 'w' on last word in file and 'b' on first word in the file.

Fixed 'dw' on empty line.

Fixed storage.c for 64 bit longs.

Fixed :w[!]>>newfile. Without the '!' the file must already exist.

In insert mode ^O had to be typed twice before the change command.

Fixed ":r !ls *". Wildcard expansion was done on "!ls".

Changed flag not reset with ":w !wc".

After CTRL-C go to normal mode. You could end up in insert mode when

interrupting a macro (e.g. with the maze solving macros).

doarglist() called FreeWild() with argv[]. This could cause a crash!

Repaired FullName() in unix.c. Now "../" and links are correctly dealth with.

Added error handling. If a file or directory does not exist this is dealth

with correctly.

Fixed ":g/pat/p". There is now a wait for "hit return" at the end.

Also fixed a double redraw.

Changed key codes for MSDOS. The old ones overlapped with a few useful

accented characters. Now only some graphics characters cannot be entered

directly from the keyboard.

Delete "recording" when p_smd is off.

Fixed ":/pat" on last line. It would give an "illegal nr" error.

Fixed "invalid chunk" bug in insertchar(). Too many blanks were deleted when

doing text formatting when the cursor is just after several blanks.

Blockwise quoting did not work with upper case operators.

Removed forceit from getfile(); makes autowrite work with CTRL-^ after :n!.

No beep when search fails. When errorbells option was set you would get two

beeps.

Isdir() in msdos.c now returns -1 when file does not exist. It would see a

non-existant file as a directory.

Fixed [new file] message for MSDOS.

Fixed screen updating in edit.c when entering CTRL-V TAB in front of a TAB.

The '^' would not be deleted.

Made t_ options working again. You couldn't set them at all!

Setting a terminal option to an empty string caused a hang.

Changed flag was set for an option when it was printed.

Fixed makeset() for spaces in string options. Now a backslash is prepended.

Fixed makemap() for special characters. Now a CTRL-V is prepended.

Fixed dosource() for a line containing CTRL-V newline. The following line is

now appended.

Makeset() and makemap() add '\r' for MSDOS.

'r' command no longer uses replace mode, except for CR, LF and TAB. Some

replacement characters would give strange results, e.g. CTRL-O.

Fixed screen updating with ":s/a/A/gc". Now the screen is updated after each

replacement, not after finishing a line.

Fixed MSDOS problem in lalloc(): Cannot handle block >64K.

Fixed bug in writeit(): Faulty write to memory when write() fails. This was a

nasty one, caused my Amiga to crash when writing to a full disk!

Fixed problem with cursor keys in xterm. This stupid terminal emulator sends

only one character at each read().

Fixed problem with linewise visual and 'o' command. The column would be

changed, making the visual mode character wise.

Fixed bug in u_undoredo() when newsize and oldsize are both zero. You would

get an error message when doing "!!foo", 'u', CTRL-R, 'u', when the command

'foo' does not exist.

Fixed bug: not doing all lines with ":%s/ /^M/g" in dosub(). The number of

lines processed was not incremented by the number of new lines created.

Fixed crash caused by call to MatchEnd() while using ARP. This would mean

that you could not use Vim with DOS 1.3. Only one person complained! Is

nobody using 1.3 anymore?

In out-of-memory situations writeit() would fail. It needed to allocate a

buffer of 4K. It would be impossible to save your changes! Now a small

emergency buffer is used.

Fixed illegal memory access when not-set terminal option was printed.

Fixed hang with V~ on last line in file when the line was empty.

Fixed crash when typing "//".

Updated builtin termcap entry for xterm. Function keys now work.

Fixed bug with allocating argv in call_shell() for unix. Could cause a crash.

Fixed deletion of "no write since last change" message with :q command.

Added call to screenalloc() in screenclear(), fixes crash when resizing

window while viewing help.

Fixed screen updating with '$' in block mode.

Redisplay INSERT message after visual bell.

Fixed backspace in column 1 in reverse insert mode.

Fixed "illegal nr" when doing i^P^H in an empty file.

Fixed ruler on empty line. Column number was wrong.

Typehead not flushed with every error, fixes problems with 'notimeout' and

errors in scripts (recovery!).

No beep with "qxq".

Added setting of Changed flag to readfile(), needed for :r !cmd.

Jumplist entries were not deleted properly, causing "no alternate file" and

"illegal nr" errors.

Fixed entering CTRL-V CTRL-@ in insert mode.

Default values for 'showcommand' and 'showmode' for unix exchanged.

Put braces around filter command for unix, allows ":r! echo this; echo that".

Fixed screen redraw after ".vim file exists" message with :e command.

Changed CTRL-W for insert mode: stop before spaces.

When changing more than 8000 lines at once undo is prohibited on Amiga and

MSDOS (used to cause out of memory errors with "10000dd").

Fixed problem with undo after delete without undo. (?)

Fixed error messages with ":set".

Terminal type not reset to default with ":set term=xxx", where xxx is not a

valid terminal type.

Fixed problem in search pattern: With 'ignorecase' set the first character

after '*' was case-sensitive.

Update screen with ":g/the/s//THE/c".

With "hit return" use command-mode mappings.

Fixed "(" and ")" for sentence ending at end of line.

Fixed screen updating with very long lines. Cursor could end up in the middle

of nowhere.

Fixed message for yank with blockwise visual (was one line off).

Fixed :copy when destination is within source range.

"r" in visual mode wanted to get another character.

With 'nowrapscan' "Q}" scrolled the screen horizontally.

Don't allocate screen if Rows or Columns is 0.

Fixed CTRL-D in insert mode: First round indent to multiple of shiftwidth.

"z<number><CR>" is limited to physical screen height. Fixes screen updating

problems when set to large number. Also fixed screen updating for CTRL-D on

command line and for ":set all".

Re-inserted forceit in getfile to make ":ta!" work. Now forceit is reset at

the end of DoOneCmd() to keep CTRL-^ working.

Check for :unmap without valid number of arguments in domap(). Ctrl-V was

removed twice from :unmap.

Added noremaplist in buffers.c; makes mixing @a and noremap mappings work.

Do not check for terminal-code in mapped characters.

Recording now stores the trailing 'q' in the register; the 'q' command is

disabled while executing a register (solves problem when final 'q' is result

from mapping).

Fixed '\~' in substitute string being recognized as '~'.

Fixed ":s/ */ /g", inserted one space per line instead of one space per

character.

Fixed ungetchr() in regexp.c: backslashed characters were not handled

correctly.

Fixed screen being messed up with long commands when 'sc' is set.

Vi-compatibility fixes

======================

When not editing last file in a file list, typing :q twice will quit.

Added [readonly] to fileinfo().

Undo in macros allowed. But it only works correctly once.

Added hidden options to avoid error messages when reading .exrc.

Allow '-ttag' (no space after -t) on command line.

Changed short name for 'showmode' option from "mo" to "smd".

Added check for "view" in main(). Vim will start in readonly mode. On Unix you

can make a link from "view" to "vim".

Undo keeps marks if line count does not change.

Fixed operators to be linewise in some cases.

CTRL-Z is :stop instead of :stop!.

'}' command does not stop at '{' at start of line.

With :s lines are split at CR, unless preceded with a CTRL-V. In fact this is

better than Vi, because vi can't insert a CR in the text with :s.

Textwidth now off when 0, also when wrapmargin set to 0.

Fixed autoindent when inserting <CR> in front of some blanks.

Removed 'repdel' option: BS in replace mode puts replaced character back

(within one line).

Option 'sect' short for 'sections'.

Adjusted 'M' when '~' lines on screen. Now put cursor in the middle of the

lines that are present on the screen, not on the middle of the screen.

Multiple spaces to separate fields in tags file allowed.

DEL displayed as ^? instead of ~?.

Added 'mesg', 'edcompatible', 'modeline', 'sourceany' and 'ttytype' options.

Only 'edcompatible' is really implemented.

Added test for trying to edit/read/write a direcory. Now you get an error

message instead of [new file] (on Amiga/MSDOS) or garbage (Unix).

'%' now works on \(this\).

In UNIX and MSDOS ignore spaces after filename. In Amiga the spaces may be

part of the filename, on other systems this is very unlikely.

Moved code from inchar() to vgetorpeek(): Key sequences can now be mapped

before recogized as key codes. But they are still stored with a special code

in the script files, which makes them terminal-independent.

Added recognition of vi-compatible modeline with set command.

Implemented 'warn' option.

Added CTRL-W to command line editing.

Implemented 0^D and ^^D in insert mode.

Non-linewise deletes within one line do not go into numbered registers.

Set previous context mark with 'L', 'M' and 'H' commands.

Make "cc" work like "S": indent not deleted when 'autoindent' set.

CTRL-U in insert mode does not delete indent when 'autoindent' set.

With the "J" command the cursor is put just after the first line instead of

at the start of the second.

Concatenated mapstr and typestr in buffers.c; makes ":map x y" ":map yz foo"

work (mixing mapped and typed characters in another mapping).

CTRL-C quits command line and insert mode.

ESC in macro executes command line (but typed ESC still quits command line).

Deleted "#include <ctype.h>" from regexp.c.

Call_shell does not always use cooked mode, fixes problem with typing CR

while doing filename completion in unix.

Fixed return value for FullName in unix.c.

Removed redraw on exit for msdos.

":v" without argument was not handled correctly in doglob().

CR-LF in tags file was not handled correctly.

Porting

=======

Added _UNIX to BSD and SYSV because 'BSD' already used by Alpha.

Added three changes for Apollo DOMAIN.

Added a few things for Amdahl UTS.

Use fork() in unix.c, not all systems have vfork().

Added POSIX compatible file type checking.

Added small changes for USL 4.2.

Added additional set of termcap entries for terminfo.

Added memmove() function for SYSV. Not all versions of memcpy() can handle

overlapped areas.

Small fixes for a few unix versions: AIX (on rs6000) and NeXT.

Changed SETWINSIZE to SETWSIZE and a few other changes for Convex.

Added a few changes for Borland C++. Phew, it compiles really fast!

Many other small changes for different Unix versions.