# Vim documentation: todo

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    *todo.txt*      For Vim version 6.0aq.  Last change: 2001 Aug 05

    		  VIM REFERENCE MANUAL	  by Bram Moolenaar

    			      TODO list for Vim		*todo*

    This is a veeeery long list of known bugs, current work and desired
    improvements.  To make it a little bit accessible, the items are grouped by
    subject.  In the first column of the line a classification is used to be able
    to look for "the next thing to do":

    Priority classification:
    9   next point release
    8   next release
    7   as soon as possible
    6   soon
    5   should be included
    4   nice to have
    3   consider including
    2   maybe not
    1   probably not
    -   unclassified

    See |votes-for-changes| for a list of votes on desired changes in Vim.
    See |develop.txt| for development plans.

    							*known-bugs*

    Amiga: test 47 fails.  Fails to read diff or does this in a wrong way,
    resulting in a ml_get error.

    Vi incompatibility:
    8   Docs for ":s&" are not correct.  What is it supposed to do?  When exactly
        are flags re-used?  What is a Vim extension?
    8   With undo/redo only marks in the changed lines should be changed.  Other
        marks should be kept.  Vi keeps each mark at the same text, even when it
        is deleted or restored. (Webb)
        Also: A mark is lost after: make change, undo, redo and undo.
        Example: "{d''"' then "u" then "d''"': deletes an extra line, because the ''
        position is one line down. (Veselinovic)
    8   When using ":s" to split a line, marks are moved to the next line. (Geddes)
    8   When using ":n" ":rew", the prev. context mark is in the same place as the
        cursor, not on the first line.
    8   "zt" should scroll one screen forward and put the cursor in the first
        line.
    8   text is put in register 1 when using "c" and "d" with a motion character:
        <control-A>   %   (   ) `<character>   /   ?   N n	 {   }
        (from Nvi manual).
    8   When stdin is not a tty, and Vim reads commands from it, an error should
        make Vim exit.
    8   Unix Vim (not gvim): Typing CTRL-C in Ex mode should finish the line
        (currently you can continue typing, but it's truncated later anyway).
    8   When loading a file in the .exrc, Vi loads the argument anyway.  Vim skips
        loading the argument if there is a file already. When no file argument
        given, Vi starts with an empty buffer, Vim keeps the loaded file. (Bearded)
    8   In Insert mode, when using <BS> or <Del>, don't wipe out the text, but
        only move back the cursor.	Behaves like '$' in 'cpoptions'.  Use a flag
        in 'cpoptions' to switch this on/off.
    8   When editing a file which is a symbolic link, and then opening another
        symbolic link on the same file, Vim uses the name of the first one.
        Adjust the file name in the buffer to the last one used?  Use several file
        names in one buffer???
        Also: When first editing file "test", which is symlink to "test2", and
        then editing "test2", you end up editing buffer "test" again.  Change the
        name of the buffer to the actual file, instead of using the name of the
        symlink?
    7   The ":undo" command works differently in Ex mode.  Edit a file, make some
        changes, "Q", "undo" and _all_ changes are undone, like editing the file
        was one command.
    7   The ":map" command output overwrites the command.  Perhaps it should keep
        the ":map" when it's used without arguments?
    7   When interrupting reading a file, Vi considers the buffer modified.  Add a
        'cpoptions' flag for this (we don't want it modified always to be able to
        do ":q")?
    7   CTRL-L is not the end of a section?  It is for Posix!  Make it an option.
    7   Implement 'prompt' option.	Init to off when stdin is not a tty.
    7   CTRL-T in Insert mode inserts 'shiftwidth' of spaces at the cursor.  Add a
        flag in 'cpoptions' for this.
    7   Add a way to send an email for a crashed edit session.  Create a file when
        making changes (containing name of the swap file), delete it when writing
        the file.  Supply a program that can check for crashed sessions (either
        all, for a system startup, or for one user, for in a .login file).
    7   Vi doesn't do autoindenting when input is not from a tty (in Ex mode).
    7   "z3<CR>" should still use the whole window, but only redisplay 3 lines.
    7   ":tag xx" should move the cursor to the first non-blank.  Or should it go
        to the match with the tag?	Option?
    7   Implement 'autoprint'/'ap' option.
    7   Add flag in 'cpoptions' that makes <BS> after a count work like <Del>
        (Sayre).
    7   Add flag in 'cpoptions' that makes operator (yank, filter) not move the
        cursor, at least when canceled. (default vi compatible).
    7   Make "5dd" on last-but-one-line not delete anything (Vi compatible).
        Add flag in 'cpoptions' for this.  When not present, "2dd" in the last
        line should delete the last line.
    7   This Vi-trick doesn't work: "Q" to go to Ex mode, then "g/pattern/visual".
        In Vi you can edit in visual mode, and when doing "Q" you jump to the next
        match.  Nvi can do it too.
    7   Support '\' for line continuation in Ex mode for these commands: (Luebking)
    	g/./a\		    g/pattern1/ s/pattern2/rep1\\
    	line 1\		    line 2\\
    	line 2\		    line 3\\
    	.		    line4/
    6   ":e /tmp/$tty" doesn't work.  ":e $uid" does.  Is $tty not set because of
        the way the shell is started?
    6   Vi compatibility (optional): make "ia<CR><ESC>10." do the same strange
        thing.  (only repeat insert for the first line).

    GTK+ GUI known bugs:
    -   When using the file browser in GTK the absolute file name is used.  Should
        try to simplify it. (Lohner)
    9   GTK GUI with Gnome: When $DISPLAY is wrong, ":gui" unexpectedly exits.
        Without Gnome it does work.
        Not all Gnome arguments get to gnome_init().
        When using confirm() the mouse pointer is invisible in the main window.
    9   When logging out from KDE, vim is not told to save its files.  Catching
        the WM_SAVE_YOURSELF event doesn't work.
    9   When selecting a font from the font selector with an embedded space it
        cannot be found. (Tsirkin)
    8   When a font is not fixed width, the message "not fixed-width" disappears
        immediately. (Tsirkin)
        Add some code to handle proportional fonts?  Need to draw each character
        separately (like xterm).  Also for when a double-width font is not exactly
        double-width. (Maeda)
    9   Can't paste a Visual selection from GTK-gvim to vim in xterm when it is
        longer than 4000 characters.  Works OK from gvim to gvim and vim to vim.
        Pasting through xterm (using the shift key) also works.
    9   With the guifont "-*-clean-medium-r-*-*-8-*-*-*-*-80-*" bold characters
        are drawn wrong.  Try on C source code.  The bold font is wider than the
        medium font.  Check bold font cellsize and use bold font trick if it's
        wrong?
    8   Font "7x14" has a bold version "7x14bold".  Try to find the bold font by
        appending "bold" when there are not 14 dashes.
    8   When using "gvim -geom 40x30" or setting 'columns' in .gvimrc or with a
        GUIEnter autocommand, the width is still set to fit the toolbar.  Also
        happens when changing the font.  How to avoid that the toolbar specifies
        the minimal window width?

    Win32 GUI known bugs:
    8   Windows NT: writing to aux.* makes Vim hang. (Acevedo)
    8   When using two monitors, the code that checks/fixes the window size and
        position (e.g. when a font changes) doesn't work properly. (George Reilly)
    8   Win32 GUI: With maximized window, ":set go-=r" doesn't use the space that
        comes available. (Poucet)  It works OK on Win 98 but doesn't work on Win
        NT 4.0.  Leaves a grey area where the scrollbar was.  ":set go+=r" also
        doesn't work properly.
    8   The dialog boxes don't have an indication of which button is the default.
        E.g., the dialog for a changed file. (Webb)
    8   When Vim is minimized and when maximizing it a file-changed dialog pops
        up, Vim isn't maximized.  It should be done before the dialog, so that it
        appears in the right position. (Webb)
    8   When activating window with mouse click, don't move cursor to mouse click.
        Catch WM_MOUSEACTIVATE. (Luevelsmeyer)
    9   When selecting at the more-prompt or hit-enter-prompt, the right mouse
        button doesn't give popup menu.
        At the hit-enter prompt CTRL-Y doesn't work to copy the modeless
        selection.
    9   When there are more than 32767 lines, the scrollbar has a roundoff error.
        Clicking the up or down error scrolls two lines or more.  Looks like there
        is an extra event that reports the new position of the scrollbar.
    9   When file modified outside of Vim and Vim gets focus, redraw is wrong.
        Put focus event in input buffer and let generic Vim code handle it.
        Try this: ":set sw ts", get enter-prompt, then change the file and clock
        "reload" in the dialog for the changed file: Window moves with the cursor!
    8   When 'grepprg' doesn't execute, the error only flashes by, the
        user can hardly see what is wrong. (Moore)
        Could use vimrun with an "-nowait" argument to only wait when an error
        occurs, but "command.com" doesn't return an error code.
    8   When the 'shell' cannot be executed, should give an appropriate error msg.
        Esp. for a filter command, currently it only complains the file could not
        be read.
    8   MessageBox used for error messages can be too big.	There is no way to
        scroll it, or even hit the OK button (but you can hit return).
        Use a scrollable window.
    7   Add an option to add one pixel column to the character width?  Lucida
        Console italic is wider than the normal font ("d" overlaps with next char).
    7   At the hit-enter prompt scrolling now no longer works.  Need to use the
        keyboard to get around this.  Pretend <CR> was hit when the user tries to
        scroll?
    7   'mousefocus' is disabled until the next mouse click, when trying to exit
        by hitting the X in the title bar. (Webb)
    7   Scrollbar width doesn't change when selecting other windows appearance.
        Also background color of Toolbar and rectangle below vert. scrollbar.
    7   "!start /min cmd" should run in a minimized window, instead of using
        "/min" as the command name. (Rogall)
    6   Drawing text transparantly doesn't seem to work (when drawing part cursor).
    8   CTRL key doesn't always work in combination with ALT key.  It does work
        for function keys, not for alphabetic characters.
    8   CTRL-@ doesn't work.  Don't even get a message for it?
    8   CTRL-- doesn't work for AZERTY, because it's CTRL-[ for QWERTY.  How do we
        know which keyboard is being used?
    7   When scrolling, and a background color is dithered, the dither pattern
        doesn't always join correctly between the scolled area and the new drawn
        area (Koloseike).
    8   Tear-off menu causes a crash when it contains many items (>100).
        (Pedro Gomes)  Probably because DLG_ALLOC_SIZE is a fixed number.

    Athena and Motif:
    8   Perhaps use fontsets for everything?
    6   When starting in English and switching the language to Japanese, setting
        the locale with ":lang", 'guifontset' and "hi menu font=", deleting all
        menus and setting them again, the menus don't use the new font.

    Athena GUI:
    9   When dragging the scrollbar thumb very fast, focus is only obtained in
        the scrollbar itself.  And the thumb is no longer updated when moving
        through files.
    7   The file selector is not resizable.  With a big font it is difficult to
        read long file names. (Schroeder)
    7   The file selector's scrollbar colors are not set after doing a
        ":hi Scrollbar guifg=color". (David Harrison)
    7   The file selector's colors are not changed by the colorscheme command.
        Related to the above problem.  Actually, the file selector gets it's
        colors from the menu's background color upon creation.  Is this what we
        really want?  The solution for this should match the solution for the
        Motif version.
    4   Re-write the widget attachments and code so that we will not have to go
        through and calculate the absolute position of every widget every time the
        window is refreshed/changes size.  This will help the "flashing-widgets"
        problem during a refresh.
    5   When starting gvim with all the default colors and then typing
        ":hi Menu guibg=cyan", the menus change color but the background of the
        pullright pixmap doesn't change colors.
        If you type ":hi Menu guibg=cyan font=anyfont", then the pixmap changes
        colors as it should.
        Allocating a new pixmap and setting the resource doesn't change the
        pullright pixmap's colors.  Why?  Possible Athena bug?

    Motif GUI:
    8   Popup menu ordering is wrong.
    8   Dialog: Accelerators don't work yet.
    8   Lesstif 0.89.4: Tearing-off a menu sometimes gives a "Restoring focus to
        NULL widget!" error.  Probably a Lesstif problem.
    8   Lesstif: When deleting a menu that's torn off, the torn off menu becomes
        very small instead of disappearing.  When closing it, Vim crashes.
        (Phillipps)

    GUI:
    9   When using a very small font, 'columns' can be very big.  Pass mouse
        events with 16 bits.
    9   On Solaris, creating the popup menu causes the right mouse button no
        longer to work for extending the selection. (Halevy)
    9   When running an external program, it can't always be killed with CTRL-C.
        e.g. on Solaris 5.5, when using "K" (Keech).  Other 'guipty' problems on
        Solaris 2.6. (Marley)
    9   On Solaris: Using a "-geometry" argument, bigger than the window where Vim
        is started from, causes empty lines below the cmdline. (raf)
    8   X11 GUI: When menu is disabled by excluding 'm' from 'guioptions', ALT key
        should not be used to trigger a menu (like the Win32 version).
    8   When setting 'langmenu', it should be effective immediately.  Store both
        the English and the translated text in the menu structure.  Re-generate
        the translation when 'langmenu' has changed.
    8   Basic flaw in the GUI code: NextScreen is updated before calling
        gui_write(), but the GUI code relies on NextScreen to represent the state
        of where it is processing the output.
        Need better separation of Vim core and GUI code.
    8   When fontset support is enabled, setting 'guifont' to a single font
        doesn't work.
    8   Menu priority for sub-menus for: Amiga, Mac, VMS, BeOS.
    8   Add menu separators for Amiga, Mac, RISCOS.
    8   Add way to specify the file filter for the browse dialog.  At least for
        browse().
    8   Add dialog for search/replace to other GUIs?  Tk has something for this,
        use that code?  Or use console dialog.
    8   When selecting a font with the font dialog and the font is invalid, the
        error message disappears too quick.
    8   gui_check_colors() is not called at the right moment.  Do it much later,
        to avoid problems.
    8   gui_update_cursor() is called for a cursor shape change, even when there
        are mappings to be processed.  Only do something when going to wait for
        input.  Or maybe every 100 ms?
    8   X11: When the window size is reduced to fit on screen, there are blank
        lines below the text and bottom scrollbar.  "gvim -geometry 80x78+0+0".
        When the "+0+0" is omitted it works.
    8   When starting an external command, and 'guipty' set, BS and DEL are mixed
        up.  Set erase character somehow?
    8   A dead circumflex followed by a space should give the '^' character
        (Rommel).  Look how xterm does this.
        Also: Bednar has some code for dead key handling.
        Also: Nedit 5.0.2 with USE_XMIM does it right. (Gaya)
    8   The compose key doesn't work properly (Cepas).  Both for Win32 and X11.
    7   The cursor in an inactive window should be hollow.  Currently it's not
        visible.
    7   GUI on Solaris 2.5.1, using /usr/dt/..: When gvim starts, cursor is
        hollow, after window lowered/raised it's OK. (Godfrey)
    7   When starting GUI with ":gui", and window is made smaller because it
        doesn't fit on the screen, there is an extra redraw.
    8   When setting font with .Xdefaults, there is an extra empty line at the
        bottom, which disappears when using ":set guifont=<Tab>". (Chadzelek)
    8   When font shape changes, but not the size, doing ":set font=" does not
        redraw the screen with the new font.  Also for Win32.
        When the size changes, on Solaris 2.5 there isn't a redraw for the
        remaining part of the window (Phillipps).
    -   Flashes really badly in certain cases when running remotely from a Sun.
    4   Re-write the code so that the highlighting isn't changed multiple times
        when doing a ":hi clear".  The color changes happen three or more times
        currently.  This is very obvious on a 66Mhz 486.

    MSDOS/DJGPP:
    8   DJGPP: "cd c:" doesn't work.  Works OK in 16-bit version.  mch_getperm()
        returns -1 for "c:".
    9   The 16 bit version runs out of memory very quickly.  Should find unused
        code and reduce static data.
    9   DOS: Make CTRL-Fx and ALT-Fx work.
        CTRL-F1 = CE-5E, CTRL-F2 = CE-5F, .., CTRL-F10 = CE-67
        ALT-F1 = CE-68, ALT-F2 = CE-69, .., ALT-F10 = CE-71
        Shifted cursor keys produce same codes as unshifted keys.  Use bioskey(2)
        to get modifier mask for <S-C-M-Fx>.
        Use CSI codes to insert modifier mask in input stream?  Make this work
        like in the GUI, but do handle a typed CSI.
        Mapping things like <M-A> doesn't work, because it generates an extended
        key code.  Use a translation table?
    9   Can't read an opened swap file when the "share" command has not been used.
        At least ignore the swap files that Vim has opened itself.
    8   setlocale() is bogus.
    8   Vim busy waits for new characters or mouse clicks.	Should put in some
        sort of sleep, to avoid eating 50% of the CPU time.  Test on an unpatched
        Windows 95 system!
    8   DJGPP: when shell is bash, make fails. (Donahoe)
    7   Hitting CTRL-P twice quickly (e.g. in keyword completion) on a 8088
        machine, starts printer echo! (John Mullin).
    7   MSDOS 16 bit version can't work with COMSPEC that has an argument, e.g.:
        COMSPEC=C:\WINDOWS\COMMAND.COM /E:4096    (Bradley)
        Caused by BCC system() function (Borland "make" has the same problem).
    8   Mouse: handle left&right button pressed as middle button pressed.  Add
        modifier keys shift, ctrl and alt.
    7   When too many files are open (depends on FILES), strange things happen.
        The Dos16 version runs out of memory, in the Dos32 version "!ls" causes a
        crash.  Another symptom: .swp files are not deleted, existing files are
        "[New file]".
    7   DJGPP version doesn't work with graphics display mode.  Switch to a mode
        that is supported?
    8   DJGPP: ":mode" doesn't work for many modes.  Disable them.
    8   DJGPP: When starting in Ex mode, shouldn't clear the screen. (Walter
        Briscoe)

    MSDOS, OS/2 and Win32:
    8   OS/2: Add backtick expansion.  Undefine NO_EXPANDPATH and use
        gen_expand_wildcards().
    8   OS/2: Add clipboard support?  See example clipbrd.exe from Alexander
        Wagner.
    8   OS/2: Add Extended Attributes support and define HAVE_ACL.
    8   Win32 console: <M-Up> and <M-Down> don't work. (Geddes)  We don't have
        special keys for these.  Should use modifier + key.
    8   Win32 console: caps-lock makes non-alpha keys work like with shift.
        Should work like in the GUI version.
    8   Environment variables in DOS are not case sensitive.  Make a define for
        STRCMP_ENV(), and use it when comparing environment var names.
    8   Setting 'shellslash' has no immediate effect.  Change all file names when
        it is set/reset?  Or only use it when actually executing a shell command?
    8   When editing a file on a Samba server, case might matter.  ":e file"
        followed by ":e FILE" will edit "file" again, even though "FILE" might be
        another one.  Set last used name in buflist_new()?  Fix do_ecmd(), etc.

    Windows 95:
    8   Editing a file by it's short file name and writing it, makes the long file
        name disappear.  Setting 'backupcopy' helps.
        Use FindFirstFile()->cAlternateFileName in fname_case() (George).
    8   Doing wildcard expansion, will match the short filename, but result in the
        long filename (both DJGPP and Win32).

    Win32 console:
    9   When editing a file by its short file name, it should be expanded into its
        long file name, to avoid problems like these: (Mccollister)
         1) Create a file called ".bashrc" using some other editor.
         2) Drag that file onto a shortcut or the actual executable.
         3) Note that the file name is something like BASHRC~1
         4) Go to File->Save As menu item and type ".bashrc" as the file name.
         5) Press "Yes" to indicate that I want to overwrite the file.
         6) Note that the message "File exists (use ! to override)" is displayed
    	and the file is not saved.
        Use FindFirstFile() to expand a file name and directory in the path to its
        long name.
    8   Also implement 'conskey' option for the Win32 console version?  Look at
        how Xvi does console I/O under Windows NT.
    7   Re-install the use of $TERM and support the use of different terminals,
        besides the console.
    8   Use of <altgr> modifier doesn't work?  5.3 was OK. (Garcia-Suarez/Guckes)
    9   Mapping <C-S-Tab> doesn't work correctly.
    9   tmpnam() uses file in root of file system: "\asdf".  That doesn't work on
        a Netware network drive.  Use same function as for Win32 GUI?
    8   In os_win32.h, HAVE_STRICMP and HAVE_STRNICMP are defined only if __GNUC__
        is not defined.  Shouldn't that be the other way around?
    9   When using libcall() for a function that returns an invalid pointer, Vim
        crashes.  Check for a bad pointer with isBadReadPtr() doesn't appear to
        work well.

    Amiga:
    9   In mch_expandpath() a "*" is to be expanded, but "\*" isn't.  Remove
        backslashes in result.
    8   Executing a shell, only one option for 'shell' is separated.  Should do
        all options, using white space separation.

    Macintosh:
    8   Define vim_mkdir() for Macintosh.
    8   Define mch_writable() for Macintosh.
    9   Explorer.vim isn't working properly.
    8   Carbon version under MacOS X is slower than Classic version.
    9   Vim cannot be renamed to something else (or it won't be able to find the
        $VINRUTIME)
    8   $HOME is supported under MacOS X, but ~ is not.
    9   When DiskLock is running, using a swap file causes a crash.  Appears to be
        a problem with writing a file that starts with a dot. (Giacalone)
    9   On G3 Mac, OS version 8, control strip causes characters messed up when
        scrolling (CTRL-L cleans it up). (Benji Fisher)
    9   On G3 Mac, OS version 8, variable-speed scrolling doesn't work, after two
        seconds of scrolling the screen freezes. (Benji Fisher)
        scrolling (CTRL-L cleans it up). (Benji Fisher)
    9   In mac_expandpath() check that handling of backslashes is done properly.
    9   Executable is called "vimPPC" instead of "gvim"? (Amerige)
    8   Standard Mac buttons and shortcuts are missing.  No close button.
        (Amerige)
    8   An invocation of gvim hands over control to an existing gvim. (Amerige)
    8   Handling of non-fixed width fonts is wrong. (Amerige)
    8   StatusLine and StatusLineNC highlighting isn't right. (Amerige)

    VMS:
    8   vimdiff doesn't work, because the diff output looks different.

    "Small" problems:
    8   ":hardcopy":
        - Separate the machine independent and machine specific parts better. (Mike
          Williams)
        - When printing on HP Laserjet L5 some of the colored text disappears.
          Probably have to do our own dithering.
        - Need to handle unprintable characters.
        - ml_get error? (Xiangjiang Ma)
    9   dosinst.c: The DJGPP version can't uninstall the Uninstall registry key on
        Windows NT.  How to install a .inf file on Windows NT and how to detect
        that Windows NT is being used?
    8   When opening the same file on Unix and on MS-Windows, there is no
        ATTENTION message, because the path in the swap file is different.  Using
        a relative path name will cause no ATTENTION for Vim 5.8.
        Somehow add a flag that the swap file is in the same dir as the file?
    9   When XIM is being used, sometimes one character is lost.  Probably when
        XIM has just been enabled.
    9   Using "rx" with 'virtualedit' set on a double-wide UTF-8 character of
        three bytes, keeps the first two bytes and adds a space.  Should replace
        the whole character if it's the same width, insert a space when it's
        smaller.
    7   When 'virtualedit' is used, moving with "$" and the "rx" still replaces
        the whole block instead of until the end of the line in each line.
    8   ":hardcopy": Using the cterm_color[] table is wrong when t_colors is > 16.
    8   A nested include file should also be found relative to the file that
        includes it.  "lev1/foo.h" includes "lev2/bar.h" which is
        "lev1/lev2/bar.h".  Should pass current file name on from
        find_pattern_in_path() to get_file_name_in_path(). (Angus Mackay)
    9   When jumping to a tag, the search pattern is put in the history.  When
        'magic' is on, the pattern may not work.  Translate the pattern depending
        on p_magic when putting it in the history?  Alternative: Store value of
        'magic' in history.  (Margo)
    9   Viminfo file becomes corrupt when editing a file with a <NL> in the name.
        (file marks, buffer list, history of marks) (Alexander N.Benner, Wichert
        Akkerman, Weisselberg)
        Also problems with buffer menu.
    9   optwin.vim: Restoring a mapping for <Space> or <CR> is not correct for
        ":noremap".  Add "mapcmd({string}, {mode})?  Use code from ":mkexrc".
    9   incsearch is incorrect for "/that/<Return>/this/;//" (last search pattern
        isn't updated).
    9   term_console is used before it is set (msdos, Amiga).
    9   Get out-of-memory for ":g/^/,$s//@/" on 1000 lines, this is not handled
        correctly.  Get many error messages while redrawing the screen, which
        cause another redraw, etc.
    8   [<C-I> doesn't work when '*' is in 'iskeyword'.  find_pattern_in_path()
        must escape special characters in the pattern.
    8   Vim can overwrite a read-only file with ":w!".  ":w" can't overwrite an
        existing file, "w!" can, but perhaps not a read-only file?  Then use
        ":w!!" for that.
        Or ask for permission to overwrite it (if file can be made writable) and
        restore file to readonly afterwards.
    7   When compiled with "xterm_clipboard", startup can be slower and might get
        error message for invalid $DISPLAY.  Try connecting to the X server in the
        background (forked), so that Vim starts up quicker?
    8   For xterm need to open a connection to the X server to get the window
        title, which can be slow.  Can also get the title with "<Esc>[21t", no
        need to use X11 calls.  This returns "<Esc>]l{title}<Esc>\".
    8   When the builtin xterm termcap contains codes that are not wanted, need a
        way to avoid using the builtin termcap.
    8   '[ and '] should be set to start/end of line when using a linewise operator
        (e.g., ":w").
    8   CTRL-A can't handle big "long" numbers, they become negative.  Check for
        "-" character, if not present, use unsigned long.
    8   Make it possible to disable the special meaning of "#" in the first column
        for ">>".
    8   Add suspending with CTRL-Z at the "more" prompt, and when executing a long
        script in do_cmdline().
    8   When using 'hidden', many swap files will be open.  When Vim runs into the
        maximum number of open files, error messages will appear.  Detect that
        this problem is present, and close any hidden files that don't have
        changes.
    8   With 'viminfo' set such that the ".viminfo" file is written on a FAT
        filesystem, an illegal file name may be created: ".vim".
    8   For each buffer that is opened, the viminfo file is opened and read to
        check for file marks.  This can be slow.
    7   In xterm, recognize both vt100 and vt220 cursor keys.  Change
        add_termcode() to not remove an existing entry for a name, when it's
        needed.
        Need a generic solution to recognize different codes for the same key.
    8   Core dump within signal function: gdb doesn't show stack backtrace!  Option
        to skip catch_signals()?
    8   Pasting with the mouse in Replace mode inserts the text, instead of
        overwriting, when it is more than one line.  Same for using <C-R>.
    7   When using search history, the trailing '/' or '?' needs to be changed
        depending on the search command.  When there was no '/' or '?', add one, so
        flags can be added easily?
    9   CTRL-E and CTRL-Y don't work in small window when 'so' is 4 and lines are
        wrapping (Acevedo/in.226).  E.g., when using CTRL-E, window height 7,
        window might actually scroll down when last line of buffer is displayed.
        --> Remember if the previous command was "cursor follows screen" or
        "screen follow cursor" and use this in cursupdate().
    7   tilde_replace() can only handle "~/", should also do "~user/".
        Get the list of home directories (from /etc/passwd?  Use getpwent()) and
        use some clever algorithm to match a path with that.  Find common strings
        in the list?
    8   When dragging status line with mouse, sometimes a jump when first clicking
        on the status line (caused by 'winheight').  Select window on button up,
        instead of on button down.
    8   When performing incremental search, should abort searching as soon as a
        character is typed.
    8   When the value of $MAKE contains a path, configure can't handle this.
        It's an autoconf bug.  Remove the path from $MAKE to work around it.
    8   How to set VIMRC_FILE to \"something\" for configure?  Why does this not
        work: CFLAGS='-DVIMRC_FILE=\"/mydir/myfile\"' ./configure
    8   The temporary file is sometimes not writable.  Check for this, and use an
        alternate name when it isn't.  Or add the 'temptemplate' option: template
        for the temp file name ":set temptemplate=/usr/tmp/?????.tmp".
        Also: Win32 version uses Windows temp directory, which might not work for
        cygwin bash.
    7   Get error "*, \+ or \( operand could be empty" for pattern "\(.\)\1\{3}".
        Remember flags for backreferences.
    7   When switching to Daylight Saving Time, Vim complains that a file has been
        changed since last read.  Can we use a function that uses GMT?
    7   When completing an environment variable after a '$', check for file names
        that contain a '$' after all have been found.
    8   When "cm" termcap entry is missing, starting gvim shouldn't complain about
        it. (Lohner)  Try out with "vt100" entry, cm replaced with cX.
    8   When running in a console and $DISPLAY is set a connection to the X server
        is made (unless 'clipboard' tells not to).  Quitting the X server then
        kills Vim.  How to detect a broken connection to the X server when running
        in a console?  Catching WM_SAVE_YOURSELF doesn't seem to work.

    I can't reproduce these (if you can, let me know how!):
    -   With backupdir=~/tmp,/tmp nowritebackup nobackup patchmode=.smr and the
        patchmode file exists, backup files in the tmp directory are left lying
        around - they should be deleted! (Riehm)
    9   Crash when changing fonts in Athena (Hiebert).  gui_mch_set_scrollbar_pos
        gets an "sb" argument that points to all zero entries...?
    9   Crash in Motif GUI, when pasting text with middle mouse button while in
        Insert mode.  SunOS 4.1.3 only? (Janssen).
    8   Motif: Tear-off menu item crashes Vim on some machines.  (Netherton)  It
        works fine for me, maybe it's a Motif problem.
    -   On Diamond Viper 132x43 mode crash on exit (John Lange)
    9   NT 4.0: Editing ".bashrc" (drag and drop), file disappears.
        Editing ".xyz" is OK. (McCollister)
    8   Win32 GUI: NT: When regaining focus at the more prompt, there is an extra
        newline. (Webb)
    8   Win32 GUI: Writable File in read-only dir can be deleted but not written?
        (Canup)
    9   GUI: Between version 5.0h and 5.0i the Home and End keys stopped working
        for Micheal Schulz (Linux and AIX).
    9   Win32 console: <M-S-Left> causes a crash. (Geddes)
    9   In MSDOS version(s): typing ESC three or four times crashes Vim, when
        'visualbell' is set (Kielhorn).

    [These have been reported for version 3.0, they may not appear in this version]
    -   MSDOS: After writing on a network the 'w' bit for others is set.

    Problems that will (probably) not be solved:
    -   X windows: When $DISPLAY points to a X server where there is no access
        permission, trying to connect to the X server causes an error message.
        XtOpenDisplay() prints this directly, there is no way to avoid it.
    -   X windows: Setting 'guifontset' to an illegal value sometimes crashes Vim.
        This is caused by a fault in a X library function, can't be solved in Vim.
    -   Motif: When adding a menu item "Find this &Symbol", the "s" in "this" will
        be underlined, instead of in "Symbol".  Motif doesn't let us specify which
        character gets the highlighting.
    -   Moving the cursor removes color in color-xterm.  This is a color-xterm
        problem!  color-xterm ver. 6.1 beta 3 and later work properly.
    -   The Dos32 version (DJGPP) can't use long file names on Windows NT.
    -   In zsh, "gvim&" changes the terminal settings.  This is a zsh problem.
        (Jennings)
    -   Problem with HPterm under X: old contents of window is lost (Cosentino).
    -   Amiga: When using quickfix with the Manx compiler we only get the first 25
        errors.  How do we get the rest?
    -   Amiga: The ":cq" command does not always abort the Manx compiler.  Why?
    -   Linux: A file with protection r--rw-rw- is seen readonly for others. The
        access() function in GNU libc is probably wrong.
    -   MSDOS: When using smartdrive with write-back buffering, writing to a
        readonly floppy will cause problems.  How to test for a writable floppy
        first?
    -   MSDOS: Both 16 and 32 bit versions: File name expansion doesn't work for
        names that start with a dot.  These used to be illegal file names.
    -   When doing a CTRL-Z and typing a command for the shell, while Vim is busy
        (e.g. writing a file), the command for the shell is sometimes eaten by Vim,
        because the terminal mode is changed from RAW to CBREAK.
    -   An old version of GNU tgoto can't handle the terminfo code for "AF".  The
        "%p1" is interpreted as "%p" and "1", causing color not to be working.
        Fix: Change the "%p1" in the "AF" and "AB" terminfo entries to "%p".
        (Benzinger).
    -   When running an external command from the GUI, typeahead is going to that
        program, not to Vim.  It looks like the shell eats the characters, Vim
        can't get back what the external command didn't use.
    -   Win32 GUI: Error code from external command not returned in shell_error.
        It appears that cmd.exe and command.com don't return an error code.
    -   Win32 GUI: The Toolbar is a bit too high when the flat style is being
        used.  We don't have control over the height of the Toolbar.
    -   Win32: All files created on the day of switching from winter to summer
        time cause "changed since editing started" messages.  It goes away when
        the file is written again the next day, or the timezone is adjusted.
        DJGPP version is OK. (Zaimi)  Looks like a problem with the Win32 library.
        Rebooting doesn't help.  Time stamps look OK in directory. (Penn)
        Is this on FAT (stores wall clock time) or NTFS (stores UTS)?
    -   SunOS 5.5.1 with Motif: The file open dialog does not have a horizontal
        scroll bar for the "files" selection.  This is a problem in the Motif
        libraries, get a patch from Sun.
    -   Solaris 2.6 with GTK and Perl: gvim crashes when started.  Problem with X
        input method called from GDK code.  Without Perl it doesn't crash.
    -   Win32 GUI: mouse wheel always scrolls rightmost window.  The events arrive
        in Vim as if the rightmost scrollbar was used.
    -   GTK with Gnome: Produces an error message when starting up:
    	Gdk-WARNING **: locale not supported by C library
        This is caused by the gnome library gnome_init() setting $LC_CTYPE to
        "en_US".  Not all systems support this locale name, thus causing the
        error.  Hopefully a newer version of GTK/Gnome fixes this problem.
    -   When using an xterm that supports the termresponse feature, and the 't_Co'
        termcap option was wrong when Vim started, it will be corrected when the
        termresponse is received.  Since the number of colors changes, the
        highlighting needs to be initialized again.  This may cause color defined
        in the vimrc file to be lost.

    						    *extensions-improvements*

    Documentation:
    8   Extend usr_27.txt a bit. (Adam Seyfarth)
    9   Merge in ideas from ~/vim/patches/tutor.txt (Gabriel Zachmann)
    7   Add a section on debugging scripts in the user manual.
    9   Make the Reference Manual more precise.  For each command mention:
        - change to cursor position and curswant
        - if it can be undone (u/CTRL-R) and redone (.)
        - how it works for folded lines
        - how it works with multi-byte characters
    9   In change.txt, remark about Javadoc isn't right.  Right alignment would
        work too.
    8   Spread the windows commands over the other files.  For example, ":stag"
        should be with ":tag".  cross-link with tags to avoid too much double
        text.
    7   Windows: When a wrong command is typed with an ALT key, give a hint to
        look at the help for 'winaltkeys'.
    -   Check text editor compendium for vi and Vim remarks.

    Help:
    -   First try using the ":help" argument literally, before using it as a
        pattern.  And then match it as part of a tag.
    -   When a help item has multiple matches make it possible to use ":tn" to go
        to the other matches.
    -   Support a way to view (and edit) .info files.
    -   Default mapping for help files: <Tab> to position cursor on next |:tag|.
    -   When hitting <Esc> or CTRL-C in Normal mode, give a message to help novice
        users to get out: "Type  :q!  to quit Vim".
    -   Implement a "sticky" help window, some help text lines that are always
        displayed in a window with fixed height. (Guckes)  Use "~/.vimhelp" file,
        user can edit it to insert his favorite commands, new account can contain a
        default contents.
    -   When entering the help window, don't resize to 'helpheight' if the user has
        reduced the size before (Webb). Keep the window height that the user set
        the window to in a "preferred window height" entry for each window.
    -   ":help :s^I" should expand to ":help :substitute".
    -   Make the help key (<F1>) context sensitive?
    -   Learn mode: show short help while typing commands.

    "make test":
    -   Find a way to skip tests that can't be done.  For non-Unix systems, but
        also for e.g. the Perl interface.

    User Friendlier:
    8   Windows install with install.exe: Use .exe instead of .bat files for
        links, so that command line arguments are passed on unmodified? (Walter
        Briscoe)
    8   Windows install: Be able to associate Vim with a selection of file types?
    8   Windows uninstall: Have uninstal.c delete the vimfiles directories that
        dosinst.c creates.  List the contents of the directory (recursively) if
        the user asks for it.  Requires an implementation of "rm -rf".

    Folding:
        (commands still available: zg zG zI zJ zK zp zP zq zQ zV zw zW zy zY;
        secondary: zB zS zT zZ)
    -   When pressing the down arrow of a scrollbar, a closed fold doesn't scroll
        until after a long time.  How to make scrolling with closed folds
        smoother?
    -   When a buffer becomes hidden, keep the manual folds for it?
    -   'foldmethod' "textobject": fold on sections and paragraph text objects.
    -   Add 'hidecomment' option: don't display comments in /* */ and after //.
    -   "zu": undo change in manual fold. "zU" redo change in manual fold.  How to
        implement this?
    -   "zJ" command: add the line or fold below the fold in the fold under the
        cursor.
    -   'foldmethod' "syntax": "fold=3": set fold level for a region.
    -   Can set 'foldtext' to empty string: don't display any line.  How to
        implement this?
    -   Apply a new foldlevel to a range of lines. (Steve Litt)

    Multi-byte characters:
    8   Should add test for using various commands with multi-byte characters.
    -   Include flipcase patch: ~/vim/patches/wall.flipcase2 ?  Make it work for
        multi-byte characters.
    8   'infercase' doesn't work with multi-byte characters.
    8   toupper() function doesn't handle byte count changes.
    8   Searching with UTF-8 doesn't always take care of composing characters.
        E.g. when using "x*" where "x" has a composing character.
    8   ":s/x/\u\1/" doesn't work, making uppercase isn't done for multi-byte
        characters.
    8   UTF-8: When there is a precomposed character in the font, use it instead
        of a character and a composing character.  See xterm for an example.
    -   GTK and Win32: Allow selecting fonts for 'guifontset' with the
        fontselector somehow.
    -   GTK and Win32: make it possible to set the font for the menu to make it
        possible to have 'encoding' different from the current locale.
    -   dbcs_class() only works for Japanese and Korean.  Implement this for
        other encodings.  The "euc-jp" and "euc-kr" choices might be wrong.
    -   Find some way to automatically select the right GUI font or fontset,
        depending on the default value of 'encoding'.
        For Windows, the charset_pairs[] table could be used.  But how do we know
        if a font exists?
    -   Do keyboard conversion from 'termencoding' to 'encoding' with
        convert_input() for Mac GUI, RiscOS GUI, BeOS GUI, VMS.
    -   Add mnemonics from RFC1345 longer than two characters.
        Support CTRL-K _{mnemonic}_
    -   Do we need the reverse of 'keymap', like 'langmap' but with files and
        multi-byte characters?
    -   When breaking a line, take properties of multi-byte characters into
        account.  The "linebreak" program from Bruno Haible can do it:
    	ftp://ftp.ilog.fr/pub/Users/haible/gnu/linebreak-0.1.tar.gz
        But it's very complicated...

    Ease of use:
    -   Add a way to save local settings and mappings into a new plugin file.
        ":mkplugin <file>"?
    9   Buffer-local autocommands?
    	:au BufEnter <current> menu enable ...
    	:au BufLeave <current> menu disable ...
    -   Add mappings local to a window: ":map <window> ..."?
    9   Add buffer-local menu.  Should offer a choice between removing the menu or
        disabling it.  Be careful that tear-offs don't disappear (keep one empty
        item?).
        Alternative: use BufEnter and BufLeave autocommands.
    8   Add file locking.  Lock a file when starting to edit it with flock() or
        fcntl().  This patch has advisory file locking while reading/writing the
        file: ~/vim/patches/kahn_file_locking .
    8   make a vimtutor script for Amiga and other systems.

    Printing:
    -   Add "page width" to wrap long lines.
    -   Unix: make conversion to PostScript work better.  Allow selecting a
        different font size.
    -   Unix: Use some dialog box to do the obvious settings (paper size, printer
        name, portrait/landscape, etc).
    -   Unix: allow selecting a printer program or a file (with the name of the
        file).

    Syntax highlighting:
    8   Make conversion to HTML faster (Write it in C or pre-compile the script).
    9   There is still a redraw bug somewhere.  Probably because a cached state is
        used in a wrong way.  I can't reproduce it...
    7   Make syntax keyword table configurable.  Set number of bits used with
        ":syn clear [hashbits]", so that we don't need to reallocate the table.
        minimal 4 bits, maximal 16. (Campbell)
    8   Allow the user to add items to the Syntax menu sorted, without having to
        change this for each release.
    8   Add a "matchcontains" for regions: items contained in the start or end
        pattern, but not in the body.
    8   Add a "keepend-contained" argument: Don't change the end of an item this
        one is contained in.  Like "keepend" but specified on the contained item,
        instead of the containing item.
    8   For keywords, allow to define the size of the hash table with ":syn
        clear".  Change KHASH_ defines into variables stored in buffer struct.
        Use something else than linear linked list from the hash table. (Campbell)
    8   cpp.vim: In C++ it's allowed to use {} inside ().
    8   Some syntax files set 'iskeyword'.  When switching to another filetype
        this isn't reset.  Add a special keyword definition for the syntax rules?
    8   Add specific syntax item to match with parens/braces that don't have a
        "%" match.  :syntax nomatch cMatchError (,{,[,),},] [contained]
    8   Highlight the text between two matching parens (e.g., with a grey
        background) when on one of the parens or in between them.
        Or highlight the matching paren when the cursor is on one.
    8   Add a command to jump to the next character highlighted with "Error".
    8   When using a cterm, and no ctermfg or ctermbg are defined, use start/stop
        sequences.	Add remark in docs that :if 'term' == "term-name" should be
        used.
    8   Add @spell cluster to String and Comment groups for many languages.  Will
        allow spell checking. (Fleiner)
    8   When listing syntax items, try to sort the keywords alphabetically.  And
        re-insert the [] if possible.
    8   Make it possible to use color of text for Visual highlight group (like for
        the Cursor).
    8   "fg" and "bg" don't work in an xterm.  Get default colors from xterm with
        an ESC sequence.  Ideas in: ~/vim/patches/vikas.xtermcolors .
    8   Make it possible to only highlight a sub-expression of a match.  Like
        using "\1" in a ":s" command.
    8   Support for deleting syntax items:
        :syn keyword cTodo remove this
        :syn match cTodo remove "pattern"
        :syn region cString remove start="this" end="that"
    8   Add possibility to sync on something else, when the syncing in one way
        doesn't find match.  For HTML: When no {script} is found, try looking for
        a '<'.  (Fleiner)
    7   Replace the synchronizing method with a state machine specification?
        Should be able to start at any line in the file, search forwards or
        backwards, and use the result of matching a pattern.
    7   Use parsing like awk, so that e.g., a ( without a matching ) can be
        detected.
    8   Make it possible to use "inverted" highlighting, invert the original
        character.  For Visual mode. (xterm-selection already does this).
    8   Highlight non-printable characters with "SpecialChar", linked to
        "Special".  Display them with the digraph characters, if possible.
    8   Highlight the clipboard-selection with a highlight group.
    8   Be able to reset highlighting to its original (default) values.
    7   Be able to write current highlighting to a file as commands, similar to
        ":mkvimrc".
    8   Improve c.vim:
        - Add check for unterminated strings, with a variable to switch it on:
          "c_strict_ansi".
        - Detect unbalanced "#endif".  Requires looking back a long way...
    8   Add an option to restrict the updating of syntax highlighting to the
        current line while in Insert mode.
    8   When guessing value of 'background', the syntax file has already been
        loaded (from the .gvimrc).	After changing 'background', load it again?
    8   Add ":syn resync" command, to re-parse the whole file until the current
        display position.
    8   Should support "me" offset for a region start pattern.  To be used to
        allow searching for the end pattern inside the match of the end pattern.
        Example: syn region pikeXX start="([^{]" end=")" should work on "()".
    8   When using a regexp for "contains=", should delay matching with it until
        redrawing happens.  Set a flag when a group is added, check this flag when
        highlighting starts.
    7   Add "semitrans": Add highlighting.  E.g., make the text bold, but keep the
        colors.  And add colors, so that Green+Red becomes Yellow.
        E.g. for this html:
    	<B> bold text <I> italic+bold text </B> italic text </I>
    7   Wild idea: Not only set highlighting, but also change what is displayed
        (e.g., remove characters, so that "<B>bold</B>" can be shown as "bold"):
    	:syn region boldstuff start="<B>" display="" end="</B>" display=""
    7   CTRL-] checks the highlight group for finding out what the tag is.
    7   Add an explanation how a list of words can be used to highlight misspelled
        words.
    8   Add spell checking.  Use "ispell -a" somehow.
        ~/vim/patches/wm_vim-5_4d.zip  can be used as an example (includes ispell
        inside Vim).
    7   Command line completion for ":find" should search in 'path'.
    8   Add more command line completion for :syntax.
    8   Add more command line completion for :highlight.
    7   Should find a better way to parse the :syntax and :highlight commands.
        Use tables or lists that can be shared by parsing for execution and
        completion?
    7   Add a few sets of colors (e.g. Borland Turbo C one).  With a menu to
        select one of the sets.
    8   Add offsets to sub-matches: "\(a*\) *"he=e1-1
        'e' is end of match 'e1' is end of sub-match 1, 's2' is start of submatch
        2, etc.
    8   In Insert mode, when there are typeahead characters, postpone the
        highlighting (for "." command).
    8   Syncing on comments isn't 100% correct when / / lines mix with / * and * /.
        For example: What about a line that starts with / / and contains * /?
    8   Ignore / * and  * / inside strings, when syncing.
    7   Build a few more syntax files from the file "/usr/share/misc/vgrindefs":
        ISP, LDL, Icon, ratfor.  And check "nedit/source/highlight.c".
    6   Add possibility to have background color continue until the right edge of
        the window.  Useful for comment blocks and function headings. (Rogall)
    -   Make it possible to add "contains" items for all items in a group.	Useful
        when extending an already existing syntax file.
    -   Add line-continuation pattern for non-syncing items too?
    -   Add possibility to highlight specific columns (for Fortran).  Or put a
        line in between columns (e.g. for 'textwidth').
    -   Add possibility to highlight the whole line, including the right margin
        (for comment blocks).
    -   Add 'hlmatch' option: List of flags:
        'c': highlight match for character under the cursor.
        'b': highlight the previous (, and its match.
        'a': highlight all text from the previous ( until its match.
    	 Also for {}, <>, etc.?
        'e': highlight all braces without a match (slow?)
        OR: add an argument "cursor" to the syntax command, which means that the
        region/match/keyword is only highlighted when the cursor is on it.
        (Campbell)
        Or do it like Elvis: define text objects and how to highlight them around
        the cursor. (Iain Truskett)
    7   Make it possible to use all words in the tags files as Keyword.
        Can also be done with a script (but it's slow).
    7   Make it possible to call a ":" command when a match is found.  Should
        allow for adding keywords from the text (e.g. variables that are set).
        And allows for sections with different highlighting.
    7   Add highlight group for commandline: "Commandline".  Make sure it
        highlights the command line while typing a command, and any output from
        messages.  And external commands?
    8   Make a version that works like less, but with highlighting: read stdin for
        text, exit at end of file, don't allow editing, etc.  moreim?  lessim?

    Built-in script language:
    8   Add referring to key options with "&t_xx".  Both for "echo &t_xx" and
        ":let &t_xx =".  Useful for making portable mappings.
    8   Allow range for ":exec".  Pass it on to the executed command. (Webb)
    8   Add a way to catch errors:
    	:try
    	:  [commands that can fail]
    	:catch [error-type]
    	:  [error handling]
    	:endtry
    7   Be able to call a function while passing on a variable number of
        arguments:
    	:function Foo(abc, ...)
    	:  call Bar(a:abc, ...)    of call Bar(a:abc, a:*)
    8   Have a look at VSEL.  Would it be useful to include? (Bigham)
    8   Add ":fungroup" command, to group function definitions together.  When
        encountered, all functions in the group are removed.  Suggest using an
        obscure name to avoid name clashes.  Require a ":fungroup END" in the same
        sourced file?  Assume the group ends at the end of the file.  Handle
        nested packages?
        Alternative: Support packages.  {package-name}:{function-name}().
        Packages are loaded automatically when first used, from
        $VIMRUNTIME/packages (or use a search path).
    7   Pre-parse or compile Vim scripts into a bytecode.  Put the bytecode with
        the original script, with an ":if has('bytecode')" around it, so that it's
        only used with a Vim that supports it.
    8   The input() function should not read mapped characters, but always get
        characters from the user (or a script).  Need to change vgetorpeek() to
        ignore mapped characters.
    8   Add functions:
    	cursor(lnum, col)	Position cursor (when lnum or col 0 keep val)
    	multibyteidx(string, idx) Byte index in multi-byte character.
    	menuname({menu_name}, {idx})  get name of menu.  menuname("", 1)
    				returns "File", menuname("File", 1) returns
    				"Open...".
    	menuarg({menu_name})	return argument of a menu item by name.
    	mapname({idx}, mode)	return the name of the idx'th mapping.
    	match({pat}, {string}, [count]) get index of count'th match
    	sprintf(format, arg, ..) How to prevent a crash???
    	attributes()		return file protection flags "drwxrwxrwx"
    	perl(cmd)		call Perl and return string
    	shorten(fname)		shorten a file name, like home_replace()
    	input(prompt, complete)	like input() but do specified completion
    	tagtype(tag)		get type of tag (also checks if it exists)
    	filewritable()		like filereadable()
    	getfperm()		file permissions, in form "rwxrwxrwx"
    	getftype()		"file", "dir", "link", "other"?
    	getbufvar({bufid}, {name})
    	setwinvar()
    	getwinvar()
    	search()		Add optional offset argument.
    	libcall()		Allow more than one argument.
    	libcallext()		Like libcall(), but using a callback function
    				to allow the library to execute a command or
    				evaluate an expression.
    	fnamemod({fname}, {mod})    {mod} can be ":p:h" etc., to be applied to
    				{fname}
    	getchar()		get one character from the user.
    	confirm()		add "flags" argument, with 'v' for vertical
    				layout and 'c' for console dialog.  Also add
    				'c' to 'guioptions' (for all dialogs) (Haegg)
    	filter({cmd} [, {string}])  Filter {string} through the shell command
    				{cmd} and return the result.  If {string} is
    				omitted no input is given to {cmd}.
    	getkey()		Like input() but get only one char.
    	raisewin()		raise gvim window (see HierAssist patch for
    				Tcl implementation ~/vim/HierAssist/ )
    7   Make bufname("'0") return the buffer name from mark '0.
    8   argc() returns 0 when using "vim -t tag".  How to detect that no file was
        specified in any way?  To be able to jump to the last edited file.
    8   Pass the executable name to the Vim scripts in some way.  As v:argv0?
    8   Add command arguments with three dashes, passed on to Vim scripts.
    8   When starting to source a vim script, delete all functions that it has
        previously defined?  Avoids using ":fun!" all the time.
    7   Add optional arguments to user functions:
    	:func myFunc(arg1, arg2, arg3 = "blah", arg4 = 17)
    6   User functions: Functions local to buffer "b:func()"?
    8   Add ":let var[{expr}] = {expr}".  When past the end of "var" just ignore.
    8   The "= register should be writable, if followed by the name of a variable,
        option or environment variable.
    8   ":let &option" should list the value of the option.
    7   Add synIDlist(), making the whole list of syntax items on the
        stack available (separated with '\n').
    8   Add autocommand-event for when a variable is changed:
    	:au VarChanged {varname} {commands}
    8   Add "has("gui_capable")", to check if the GUI can be started.
    8   Add possibility to use variables like registers: characterwise (default),
        linewise (when ending in '\n'), blockwise (when ending in '\001').	reg0,
        rega, reg%, etc.  Add functions linewise({expr}), blockwise({expr}) and
        charwise({expr}).
    7   Make it possible to do any command on a string variable (make a buffer
        with one line, containing the string).  Maybe add an (invisible) scratch
        buffer for this?
    	result = scratch(string, command)
    	result = apply(string, command)
    	result = execute(string, command)
        "command" would use <> notation.
        Does scratch buffer have a number?  Or re-use same number?
    7   Add function to generate unique number (date in milliseconds).
    7   Automatically load a function from a file when it is called.  Need an
        option for the search path. (Sekera)
    7   Include support for arrays?  Patch from Robert Webb.
        This is restricted to fixed-size arrays indexed by number.  Better: Use
        associative arrays: a[5] = 3, a["some"] = 'x'. Implement by translating
        into ordinary variables: a[5] is "-a-5", a["some"] is "a-some", a[5][6] is
        "a-5-6".  But how to do array assignment and concatenation?

    Robustness:
    8   This pattern in syntax/java.vim causes a recursive call of regmatch():
    	syn match   javaStringError      +"\([^"\\]\|\\.\)*$+
        A long line with a " in it can cause a crash when it runs out of stack
        space (on non-Unix systems).  How can we catch this?

    Performance:
    9   Loading menu.vim still takes quite a bit of time.  How to make it faster?
    8   in_id_list() takes much time for syntax highlighting.  Cache the result?
    7   setpcmark() shifts the jumplist, this takes quite a bit of time when
        jumping around.  Instead use an index for the start?
    8   When displaying a space with only foreground highlighting, it's the same
        as a space without attributes.  Avoid displaying spaces for the "~" lines
        when starting up in a color terminal.
    8   Avoid alloc() for scratch buffer use, esp. in syntax.c.  It's very slow on
        Win16.
    9   Setting GUI options in the console (e.g., 'guifont') should not cause a
        redraw.
    8   Profiling shows that in_id_list() is used very often for C code.  Can this
        function be improved?
    8   For an existing file, the page size of the swap file is always the
        default, instead of using the block size of the device, because the swap
        file is created only after setting the block size in mf_open().  How can
        this be improved?
    8   Set default for 'ttyscroll' to half a screen height?  Should speed up
        MS-DOS version. (Negri)
    7   Check how performance of loading the wordlist can be imrpoved (adding a
        lot of abbreviations).
    7   DOS console: Add t_DL support, to make scrolling faster.
    7   Compile Ex commands to byte codes.  Store byte codes in a vim script file
        at the end, after "compiled:.  Make it look like a single comment line
        for old Vim versions.  Insert first line "Vim script compiled <timestamp>.
        Only used compiled code when timestamp matches the file stat.
        Add command to compile a vim script and add it to the file in-place.
        Split Ex command executing into a parsing and executing phase.
        Use compiled code for functions, while loops, etc.
    8   When editing a file with extremely long lines (e.g., an executable), the
        "linerest" in readfile() is allocated twice to be able to copy what was
        read so far.  Use realloc() instead?  Or split the line when allocating
        memory fails and "linerest" is big (> 100000)?
    8   When defining autocommands (e.g., from $VIMRUNTIME/filetype.vim), need to
        compare each pattern with all existing patterns.  Use a hash code to avoid
        using strcmp() too often?
    7   Include turbo_loader patches, speeding up reading a file?
        Speed up reading a file by reading it into a fixed-size buffer, creating
        the list of indexes in another buffer, and then copying the result into a
        memfile block with two copies.  Then read the next block into another
        fixed-size buffer, create the second list of indexes and copy text from
        the two blocks to the memfile block.
    7   do_cmdline(): Avoid that the command line is copied to allocated memory
        and freed again later all the time.  For while loops, and for when called
        with an argument that can be messed with.
        Generic solution: Make a struct that contains a pointer and a flag that
        indicates if the pointer should be freed when replaced.
    7   Check that that the file size is not more than "sizeof(long)".
    -   Further improve finding mappings in maphash[] in vgetorpeek()
    8   Dragging the status line doesn't scroll but redraw.
    8   Syntax highlighting is slow when deleting lines.  Try in
        $VIMRUNTIME/filetype.vim.
    -   "out of memory" after deleting (1,$d) and changing (:%s/^/> /) a lot of
        lines (27000) a few times.  Memory fragmentation?
    -   Have a look at how pdksh does memory allocation (alloc.c). (Dalecki)
    -   Do profiling on:
        - :g/pat/normal cmd
        - 1000ii<Esc>
        - deleting 10Mbyte worth of lines (netscape binary)
        - ":g/^/m0" on a 450Kbyte file.  And the "u".
        - highlighting "~/vim/test/longline.tex", "~/vim/test/scwoop.tcl" and
          "~/vim/test/lockup.pl".
        - loading a syntax file to highlight all words not from a dictionary.
        - editing a vim script with syntax highlighting on (loading vim.vim).
    7   Screen updating can be further improved by only redrawing lines that were
        changed (and lines after them, when syntax highlighting was used, and it
        changed).
        - On each change, remember start and end of the change.
        - When inserting/deleting lines, remember begin, end, and line count.
    -   Use macros/duarte/capicua for profiling.  Nvi 1.71 is the fastest!
    -   When using a file with one long line (1Mbyte), then do "$hhhh", is still
        very slow.  Avoid calling getvcol() for each "h"?
    -   Executing a register, e.g. "10000@@" is slow, because ins_typebuf has to
        move the previous commands forward each time.  Pass count from
        normal_cmd() down to do_execreg().
    -   Repeating insert "1000i-<Esc>" displays --INSERT-- all the time, because of
        the <Esc> at the end.  Make this work faster (disable redrawing).
    -   Avoid calls to plines() for cursor line, use w_cline_height.
    -   When only need to redraw the status lines in status_redraw_all(), need to
        update NOT_VALID to force the redraw.  Should detect that only the status
        lines need to be redrawn (add STATUSLN between VALID and NOT_VALID?).
    -   After ":set nowrap" remove superflous redraw with wrong hor. offset if
        cursor is right of the screen.
    8   Make CTRL-C on Unix generate a signal, avoid using select() to check for a
        CTRL-C (it's slow).

    Code size:
    8   GUI: When NO_CONSOLE is defined, more code can be excluded.
    -   Put getline() and cookie in a struct, so only one argument has to be
        passed to do_cmdline() and other functions.
    8   Make a GUI-only version for Unix?

    Messages:
    8   For 'verbose' level 12 prints commands from source'ed files.  How to skip
        lines that aren't executed?  Perhaps move the echoing to do_cmdline()?
    8   Use 'report' for ":bdel"?  (Krishna)  To avoid these messages when using a
        script.
    8   "vim --version" output goes to stderr, should be stdout.  Can all output
        from messages using printf() go to stdout?
    -   Delete message after new command has been entered and have waited for key.
        Perhaps after ten seconds?
    -   Make message history available in "msg" variables: msg1, msg2, .. msg9.
    9   Check handling of overwriting of messages and delays:
        Very wrong: errors while redrawing cause endless loop.
        When switching to another file and screen scrolls because of the long
        message and return must be typed, don't scroll the screen back before
        redrawing.
    7   Add an option, which is a regexp, that disables warning messages which
        match that regexp (Tsirkin).
    8   When address range is wrong you only get "Invalid range".  Be a bit more
        specific: Negative, beyond last line, reverse range?  Include the text.
    8   Make it possible to ignore errors for a moment ('errorignore'?).  Another
        option to switch off giving error messages ('errorquiet'?).  Also an option
        not to give any messages ('quiet')?  Or ":quiet on", ":quiet off".
        Careful: For a severe error (out of memory), and when the user starts
        typing, error messages must be switched back on.
        Also a flag to ignore error messages for shell commands (for mappings).
    -   Option to set time for emsg() sleep. Interrupt sleep when key is typed?
        sleep before second message?
    8   In Ex silent mode or when reading commands from a file, what exactly is
        not printed and what is?  Check ":print", ":set all", ":args", ":vers",
        etc.  At least there should be no prompt. (Smulders)  And don't clear the
        screen when reading commands from stdin. (Kendall)
        --> Make a difference between informative messages, prompts, etc. and
    	error messages, printing text, etc.
    8   Window should be redrawn when resizing at the hit-enter prompt.
        Also at the ":tselect" prompt.  Find a generic solution for redrawing when
        a prompt is present (with a callback function?).

    Screen updating:
    7   Add a string to the 'display' option to make CTRL-E and CTRL-Y scroll one
        screen line, also if this means the first line doesn't start with the
        first character (like what happens with a single line that doesn't fit).
    -   screen_line():
        - insert/delete character stuff.
        - improve delete rest of line (spaces at end of line).
    -   When moving or resizing window, try to avoid a complete redraw (esp. when
        dragging the status line with the mouse).
    -   When 'lazyredraw' set, don't echo :ex commands?  Need a flag to redraw when
        waiting for a character.
    8   Add a ":refresh [winnr]" command, to force updating a window.  Useful from
        an event handler where ":normal" can't be used.  Also useful when
        'lazyredraw' is set in a mapping.
    7   Make 'list' and 'linebreak' work together.

    Scrolling:
    8   Add "zm" command: scroll horizontally to put the cursor in the middle.
    6   Add option to set the overlap for CTRL-F and CTRL-B. (Garhi)
    -   extend 'scrollbind' option: 'scrollopt' words "search", "relative", etc..
        Also 'e'xecute some commands (search, vertical movements) in all bound
        windows.
    -   Allow scrolling by dragging with the mouse.  Like the "hand" in Acrobat
        reader.  With which mouse button?
    -   Add command to execute some commands (search, vertical movements) in all
        bound windows.
    -   Add 'search' option to 'scrollopt' to allow 'scrollbind' windows to
        be bound by regexp searches
    -   Add "z>" and "z<": scroll sideways one screenfull. (Campbell)
    -   Add option to set the number of lines when not to scroll, instead of the
        fixed number used now (for terminals that scroll slow with a large number
        of lines but not with a single line).

    Autoconf:
    8   Should use acconfig.h to define prototypes that are used by autoheader.
    8   Some compilers don't give an error for "-OPT:Olimit" but a warning. (Webb)
        Add a check for the warning, so that "Olimit" can be added automatically?
    -   Autoconf: Use @datadir@ for the system independent files.  Make sure the
        system dependend and system independed files are separated. (Leitner).
    -   Add autoconf check for waitpid()/wait4().
    -   Remove fcntl() from autoconf, all systems have it?
    -   Set default for 'dictionary', add search for dictionary to autoconf.

    Perl interface:
    8   Rename typemap file to something else?
    7   Make buffers accessed as Perl arrays. (Clark)
    7   Make it possible to compile with non-ANSI C?
    6   Tcl/Tk has the "load" command: load a shared library (.so or .dll).

    Shared libraries:
    6   Add support for loading shared libraries, and calling functions in it.
    	:libload internal-name libname
    	:libunload internal-name
    	:liblist
    	:libcall internal-name function(arg1, arg2, ...)
    	:libcall function(arg1, arg2, ...)
        libcall() can have only one integer or String argument at the moment.
    6   Have a look on how Perl handles loading dynamic libraries.

    Tags:
    8   Add a command to jump to a certain kind of tag.  Allow the user to specify
        values for the optional fields.  E.g., ":tag size type=m".
    8   Add a function that returns the line in the tags file for a matching tag.
        Can be used to extract more info (class name, inheritance, etc.) (Rico
        Hendriks)
    7   Count before CTRL-]: jump to N'th match
    8   Scope arguments for ":tag", e.g.: ":tag class:cPage open", like Elvis.
    8   When output of ":tselect" is long, getting the more-prompt, should be able
        to type the tag number directly.
    7   Add 'tagignorecase' option from Vile: ignore case for tags.
    7   Make output of ":tselect" a bit nicer.  Use highlighting?
    7   Highlight the "tag 1 of >2" message.  New highlight group, or same as "hit
        bottom" search message.
    7   When using ":tag" at the top of the tag stack, should add another entry,
        so CTRL-T can bring you back to where you are now AND to where you were
        before the previous ":tag" command. (Webb)
    7   When using CTRL-] on someClass::someMethod, separate class from method and
        use ":ta class:someClass someMethod".
        Include C++ tags changes (Bertin).	Change "class::func" tag into "func"
        with "class=class"?  Docs in oldmail/bertin/in.xxx.
    7   Add ":tagargs", to set values for fields:
    	:tagargs class:someclass file:version.c
    	:tagargs clear
        These are then the default values (changes the order of priority in tag
        matching).
    7   Support for "gtags" and "global"?  With ":rtag" command?
        There is an example for how to do this in Nvi.
        Or do it like Elvis: 'tagprg' and 'tagprgonce' options. (Yamaguchi)
        The Elvis method is far more flexible, do it that way.
    7   Support "col:99" extra field, to position the cursor in that column.  With
        a flag in 'cpoptions' to switch it off again.
    7   Better support for jumping to where a function or variable is used.  Use
        the id-utils, with a connection to "gid" (Emacs can do it too).  Add
        ":idselect", which uses an "ID" database (made by "mkid") like "tselect".
    6   Don't store the search pattern from a tag command in the search history
        (with an option)?

    Security:
    -   nothing at the moment

    Win32 GUI:
    8   Should make --remote work with OLE, just like it works for Unix.  Also
        the other --server arguments and server...() functions.
    8   Make debug mode work while starting up (vim -D).  Open console window for
        the message and input?
    8   Add font argument to set the lfCharSet. (Bobcik)
    8   Somehow automatically detect the system language and set $LANG, so that
        gettext and menus work.
    8   Could keep console open to run multiple commands, to avoid the need to hit
        return in every console.
        Also: Look at how Emacs does runs external commands:
    	http://www.cs.washington.edu/homes/voelker/ntemacs.html.
    8   When dropping a file onto gvim while at the ":" prompt, insert the file
        name.  Allows using the name with different commands. (Krishna)
    8   Need a separate PopUp menu for modeless selection.  Need two new commands:
        Copy selection to clipboard, Paste selection (as typed text).
    8   Dropping a file on a gvim that edits a modified buffer splits the window.
        Make an option to replace the current file (use ":e" instead of ":sp")?
        When dropping multiple files, display the first one and adjust the
        arglist.  Or make it an option for the user to chose betwen ":e" and ":sp"?
    8   Support copy/paste for other file formats.  At least HTML, perhaps RTF.
        Add "copy special" and "paste special" commands?
    7   Use <C-Tab> to cycle through open windows (e.g., the find dialog).
    7   <Esc> should close a dialog.
    7   Keep the console for external commands open.  Don't wait for a key to be
        hit.  Re-open it when the user has closed it anyway.  Or use a prepended
        command: ":nowait {cmd}", or ":quiet", which executes {cmd} without any
        prompts.
    7   Should be able to set an option so that when you double click a file that
        is associated with Vim, you can either get a new instance of Vim, or have
        the file added into an already running Vim.

    GUI:
    8   Make inputdialog() work for Photon, Amiga, Mac, RiscOS.
    -   <C--> cannot be mapped.  Should be possible to recognize this as a
        normal "-" with the Ctrl modifier.
    7   Implement ":popup" for other systems than Windows.
    8   Implement ":tearoff" for other systems than Win32 GUI.
    8   When using the scrollbar to scroll, don't move the cursor position.  When
        moving the cursor: scroll to the cursor position.
    9   Make <S-Insert> paste from the clipboard by default. (Kunze)
    7   Menu local to a buffer, like mappings.  Or local to a filetype?
    8   Dragging the mouse pointer outside of a Vim Window should make the text
        scroll.  Return a value from gui_send_mouse_event() to the machine
        specific code to indicate the time in which the event should be repeated.
    8   Make it possible to ignore a mouse click when it's used to give Vim (gvim)
        window focus.  Also when a mouse click is used to bring a window to front.
    8   Make the split into system independend code and system specific code more
        explicit.  There are too many #ifdefs in gui.c.
        If possible, separate the Vim code completely from the GUI code, to allow
        running them in separate processes.
    8   Support a background bitmap.  Useful for marking a column.  Patch from
        Heather Downs (GTK) and Vince Negri (Win32).
    7   X11: Support cursorColor resource and "-cr" argument.
    8   X11 (and others): CTRL-; is not different from ';'.  Set the modifier mask
        to include CTRL for keys where CTRL produces the same ASCII code.
    8   Visual highlighting should keep the same font (bold, italic, etc.).
    8   Add 'c' flag in 'guioptions' to use console dialogs instead of GUI dialogs.
        Esp. for the ATTENTION prompt.
    8   Add flag to 'guioptions' to not put anything in the clipboard at all?
    8   Should take font from xterm where gvim was started (if no other default).
    8   Selecting font names in X11 is difficult, make a script or something to
        select one.
    8   Should support a way to use keys that we don't recognize yet.  Add a
        command that adds entries to special_keys somehow.	How do we make this
        portable (X11, Win32, ..)?
    7   Add a flag to 'guioptions' that tells not to remove inactive menu items.
        For systems where greying-out or removing menu items is very slow.  The
        menu items would remain visibly normally, but not do anything.
    7   Add ":minimize" and ":maximize", which iconize the window and back.
        Useful when using gvim to run a script (e.g. 2html.vim).
    7   X11: Is it possible to free allocated colors, so that other programs can
        use them again?  Otherwise, allow disabling allocating the default colors.
        Or allocate an own colormap (check UAE).  With an option to use it.  For
        the commandline, "-install" is mostly used for X11 programs.
    7   Add command line argument for "gvim" not to start the GUI.  Sort of the
        inverse of "vim -g". (Vikas)
    7   Should support multi-column menus.
    -   Should add option for where to put the "Help" menu: like Motif at the far
        right, or with the other menus (but still at the right).
    -   Add menu item to "Keep Insert mode".
    8   ":mkgvimrc" command, that includes menus.
    6   Big change: Move GUI to separate program "vimgui", to make startup of vim a
        lot faster, but still be able to do "vim -g" or ":gui".
    6   Make it possible to "drag the text" (grab a character and move it
        up/down).  Use Alt-LeftMouse for this?  (Goldfarb)
    7   More explicit mouse button binding instead of 'mousemodel'?
    7   Add option to set the position of the window on the screen.  'windowpos',
        which has a value of "123,456": <x>,<y>.
        Or add a command, like ":winsize"?
    7   Add toolbar for non-Win32 GUIs.
    7   Make it possible to put the toolbar on top, left, right and/or bottom of
        the window?  Allows for softkey-like use.
    6   Separate the part of Vim that does the editing from the part that runs the
        GUI.  Communicate through a pseudo-tty.  Vim starts up, creates a
        pty that is connected to the terminal.  When the GUI starts, the pty is
        reconnected to the GUI process.  When the GUI stops, it is connected to
        the terminal again.  Also use the pty for external processes, it looks
        like a vt100 terminal to them.  Vim uses extra commands to communicate GUI
        things.
    -   Motif steals <F10> from us, to pop up menus with the keyboard.  How do we
        get it back if we want it?
    -   Paste in Insert mode should not do autowrap etc.  Or maybe this should be
        changeable with an option?
    -   Put a nice picture in the icon (but how do we do that?).
    7   When using a pseudo-tty Vim should behave like some terminal (vt52 looks
        simple enough). Terminal codes to/from shell should be translated.
    -   Would it be useful to be able to quit the GUI and go back to the terminal
        where it was started from?

    Autocommands:
    9   Make sure that side effects of autocommands are handled correctly.  Don't
        execute autocommands when a buffer or window is halfway some changes.
        Move all apply_autocmds() calls to a higher level where needed.
    8   Use another option than 'updatetime' for the CursorHold event.  The two
        things are unrelated for the user (but the implementation is more
        difficult).
    8   Can't use ":normal" in CursorHold autocommands.  Make the CursorHold event
        insert a special key code, and call the autocommand functions from a
        higher level, so that vgetc() isn't used recursively.
    8   Autocommands should not change registers.  And marks?  And the jumplist?
        And anything else?
    8   Autocommand for when modified files have been found, when getting input
        focus again (e.g., FileChangedFocus).
        Check when: getting focus, jumping to another buffer, ...
    8   Add autocommands, user functions and user commands to ":mkvimrc".
    8   Add "TagJumpFile" autocommand: When jumping to another file for a tag.
        Can be used to open "main.c.gz" when "main.c" isn't found.
    7   Add a way to skip an autocommand if going from one *.c file to another *.c
        file.
    7   When trying to open a directory, don't load the file but trigger an
        autocommand event OpenDirectory.
    7   Add file type in front of file pattern: <d> for directory, <l> for link,
        <x> for executable, etc.  <&xxx> for Risc OS.  With commas to separate
        alternatives.  The autocommand is only executed when both the file type
        AND the file pattern match. (Leonard)
    5   Add option that specifies extensions which are to be discarded from the
        file name.  E.g. 'ausuffix', with ".gz,.orig".  Such that file.c.gz will
        trigger the "*.c" autocommands.  (Belabas)
    7   Add something to break the autocommands for the current event, and for
        what follows.  Useful for a "BufWritePre" that wants to avoid writing the
        file.
    8   Detect textmode after executing the autocommands, otherwise the .gz
        autocommands don't work for MS-DOS.  Needs to be able to remove the ^Ms at
        the end of each line.  Alternative: don't use a filter command, write the
        file, gunzip, set nobin, delete the lines, read the file.
    8   Add buffer-local autocommands?  Reduces overhead for autocommands that
        trigger often (inserting a character, switching mode).
    	:au Event <buffer> do-something
    -   Add events to autocommands:
        Error	    - When an error happens
        NormalEnter	    - Entering Normal mode
        InsertEnter	    - Entering Insert mode
        ReplaceEnter    - Entering Replace mode
        CmdEnter	    - Entering Cmdline mode
        VisualEnter	    - Entering Visual mode
        *Leave	    - Leaving the mode
        SearchPost	    - After doing a search command (e.g. to do "M")
        PreDirChanged/PostDirChanged
    		    - Before/after ":cd" has been used (for changing the
    		      window title)
        BufReadAction   - replaces reading a file
        BufWriteAction  - replaces writing a file
        ShutDown	    - when the system is about to shut down
        InsertCharPre   - user typed character Insert mode, before inserting the
    		      char.  Pattern is matched with text before the cursor.
    		      Set v:char to the character, can be changed.
    		      (not triggered when 'paste' is set).
        InsertCharPost  - user typed a character in Insert mode, after inserting
    		      the char.
        BufModified	    - When a buffer becomes modified, or unmodified (for
    		      putting a [+] in the window title or checking out the
    		      file from CVS).
        BufFirstChange  - When making a change, when 'modified' is set.  Can be
    		      used to do a :preserve for remote files.
        BufChange	    - after a change was made.  Set some variables to indicate
    		      the position and number of inserted/deleted lines, so
    		      that marks can be updated.  HierAssist has patch to add
    		      BufChangePre, BufChangePost and RevertBuf. (Shah)
    -   Add autocommand to be executed every so many seconds?  For writing the
        file now and then ('autosave').

    				  *'autosave'* *'as'* *'noautosave'* *'noas'*
        'autosave' 'aw' number  (default 0)
    	    Automatically write the current buffer to file N seconds after the
    	    last change has been made and when |'modified'| is still set.
    	    Default: 0 = do not autosave the buffer.

    Insert mode completion/expansion:
    9   ^X^L completion doesn't repeat correctly.  It uses the first match with
        the last added line, instead of continuing where the last match ended.
        (Webb)
    8   The code has become too complex.  Redesign it, or at least add proper
        comments.
    8   Add option to set different behavior for Insert mode completion:
        - ignore/match case
        - different characters than 'iskeyword'
    8   Add a command to undo the completion, go back to the original text.
    8   Use the class information in the tags file to do context-sensitive
        completion.  After "foo." complete all member functions/variables of
        "foo".  Need to search backwards for the class definition of foo.
        Should work for C++ and Java.
        Even more context would be nice: "import java.^N" -> "io", "lang", etc.
    7   When expanding $HOME/dir with ^X^F keep the $HOME (with an option?).
    7   Add CTRL-X command in Insert mode like CTRL-X CTRL-N, that completes WORDS
        instead of words.
    8   Add CTRL-X CTRL-R: complete words from register contents.
    8   Add completion of previously inserted texts (like what CTRL-A does).
        Requires remembering a number of insertions.
    8   Add 'f' flag to 'complete': Expand file names.
        Also apply 'complete' to whole line completion.
    -   Make it possible to search include files in several places.  Use the
        'path' option?  Can this be done with the dictionary completion (use
        wildcards in the file name)?
    -   For files found with 'include': handle "*" in included name, for Java.
        (Jason)
    -   Make CTRL-X CTRL-K do a binary search in the dictionary (if it's sorted).
    -   Speed up CTRL-X CTRL-K dictionary searching (don't use a regexp?).
    -   Set a mark at the position where the match was found (file mark, could
        be in another file).
    -   Add CTRL-A command in CTRL-X mode: show all matches.
    -   Make CTRL-X CTRL-L use the 'complete' option?
    -   Add command in CTRL-X mode to add following words to the completed string
        (e.g. to complete "Pointer->element" with CTRL-X CTRL-P CTRL-W CTRL-W)
    -   CTRL-X CTRL-F: Use 'path' to find completions.
    -   CTRL-X CTRL-F: Don't replace "$VIM" with the actual value. (Kelly)
    8   Add option 'isexpand', containing characters when doing expansion (so that
        "." and "\" can be included, without changing 'iskeyword'). (Goldfarb)
        Also: 'istagword': characters used for CTRL-].
        When 'isexpand' or 'istagword' are empty, use 'iskeyword'.

    Command line editing:
    7   Add commands (keys) to delete from the cursor to the end of the command
        line.
    -   Add flags to 'whichwrap' for command line editing (cursor right at end of
        lines wraps to start of line).
    -   Make editing the command line work like Insert mode in a single-line view
        on a buffer that contains the command line history.  But this has many
        disadvantages, only implement it when these can be solved.  Elvis has run
        into these, see remarks from Steve (~/Mail/oldmail/kirkendall/in.00012).
        - Going back in history and editing a line there would change the history.
          Would still need to keep a copy of the history elsewhere.  Like the
          cmdwin does now already.
        - Use CTRL-O to execute one Normal mode command.  How to switch to normal
          mode for more commands?  <Esc> should cancel the command line.  CTRL-T?
        - To allow "/" and "= need to recursively call getcmdline(), overwrite the
          cmdline.  But then we are editing a command-line again.  How to avoid
          that the user gets confused by the stack of command lines?
        - Use edit() for normal cmdline editing?  Would have to integrate
          getcmdline() into edit().  Need to solve conflicts between Insert mode
          and Command-line mode commands.  Make it work like Korn shell and tcsh.
          Problems:
    	- Insert: completion with 'wildchar'
    	- Insert: use cmdline abbreviations
    	- Insert: CTRL-D deletes indent instead of listing matches
    	- Normal: no CTRL-W commands
    	- Normal: no ":" commands?
    	- Normal: allow Visual mode only within one line.
        - where to show insert/normal mode message?  Change highlighting of
          character in first column?
        - Implementation ideas:
          - Set "curwin" and "curbuf" to the command line window and buffer.
          - curwin->w_topline is always equal to curwin->w_cursor.lnum.
          - never set 'number', no folding, etc.  No status line.
          - sync undo after entering a command line?
          - use NV_NOCL flag for commands that are not allowed in Command-line
    	Mode.

    Command line completion:
    8   Change expand_interactively into a flag that is passed as an argument.
    8   When completing command names, either sort them on the long name, or list
        them with the optional part inside [].
    -   For 'wildmenu': Simplify "../bar" when possible.
    -   When using <Up> in wildmenu mode for a submenu, should go back to the
        current menu, not the first one.  E.g., ":emenu File.Save<Up>".
    8   For ":find" and ":sfind" expand files found in 'path'.
    8   When using backtick expansion, the external command may write a greeting
        message.  Add an option or commands to remove lines that match a regexp?
    7   When listing matches of files, display the common path separately from the
        file names, if this makes the listing shorter. (Webb)
    -   Add command line completion for ":ilist" and friends, show matching
        identifiers (Webb).
    8   Add command line completion for "old value" of a command.  ":args <key>"
        would result in the current list of arguments, which you can then edit.
    6   Add command line completion with CTRL-X, just like Insert mode completion.
        Useful for ":s/word/xx/".
    -   Add command to go back to the text as it was before completion started.
        Also to be used for <Up> in the command line.
    -   Add 'wildlongest' option: Key to use to find longest common match for
        command line completion (default CTRL-L), like 'wildchar'. (Cregut)
        Also: when there are several matches, show them line a CTRL-D.
    7   With command line completion after '%' and '#', expand current/alternate
        file name, so it can be edited.
    -   Add completion for Environment variables: ":echo $SH<Tab>" -> "$SHELL".

    Command line history:
    -   Add "KeyWasTyped" flag: It's reset before each command and set when a
        character from the keyboard is consumed. Value is used to decide to put a
        command line in history or not. Put line in history if it didn't
        completely resulted from one mapping.
    -   When using ":browse", also put the resulting edit command in the history,
        so that it can be repeated. (Demirel)

    Insert mode:
    9   When 'autoindent' is set, hitting <CR> twice, while there is text after
        the cursor, doesn't delete the autoindent in the resulting blank line.
        (Rich Wales) This is Vi compatible, but it looks like a bug.  Rich has a
        suggestion for a patch to fix this.
    8   When using CTRL-O in Insert mode, then executing an insert command
        "a" or "i", should we return to Insert mode after <Esc>? (Eggink)
        Perhaps it can be allowed a single time, to be able to do
        "<C-O>10axyz<Esc>".  Nesting this further is confusing.
        ":map <F2> 5aabc<Esc>" works only once from Insert mode.
    7   Make ":startinsert" command work directly for functions and scripts?
        Also make it possible to append (it's difficult at end of line).
    7   Use 'matchpairs' for 'showmatch': When inserting a character check if it
        appears in the rhs of 'matchpairs'.
    -   In Insert mode (and command line editing?): Allow undo of the last typed
        character.	This is useful for CTRL-U, CTRL-W, delete and backspace, and
        also for characters that wrap to the next line.
        Also: be able to undo CTRL-R (insert register).
        Possibly use 'backspace'="whole" for a mode where at least a <CR> that
        inserts autoindent is undone by a single <BS>.
    -   Use CTRL-G in Insert mode for an extra range of commands, like "g" in
        Normal mode.
    -   Make 'paste' work without resetting other options, but override their
        value.  Avoids problems when changing files and modelines or autocommands
        are used.
    -   When typing CTRL-V and a digit higher than 2, only expect two digits.
    -   Insert binary numbers with CTRL-V b.
    -   Make it possible to undo <BS>, <C-W> and <C-U>.  Bash uses CTRL-Y.

    'cindent', 'smartindent':
    9   One indent to much when doing "o" below this "while": (Rouben Rostamian)
    	{
    	    do
    		if (1) {
    		    asdf;
    		} else
    		    qwer;
    	    while (1);
    9   brace not indented correctly:
    	case 'c':   if (cond)
    			{
        Should align with "if" in case statement.
    7   Allow aligning a closing ")" with the line above, instead of the matching
        "(": (Riehm) if (asdfasdf &&
    			asdf
    			)
    9   "case xx: {", or in general: any { with text before it, a matching }
        should not line up with the {, but with the indent at that position.
        Add setting for K&R paren style?  Should be used for this:
    	case xx: {
    		    some_cmd;
    	}
    8   "int asdf,<CR>asdf;" should indent the second line more. (Zellner)
    8   In C++ it's possible to have {} inside (): (Kirshna)
    		func(
    			new String[] {
    			    "asdf",
    			    "asdf"
    			}
    		    );
    7   Separate "(0" option into inside/outside a function (Zellner):
    	func(
    	   int x)	// indent like "(4"
    	{
    	   if (a
    	       && b)	// indent like "(0"
    9   Wrong indent for continuation line with a string:
    	void foo()
    	{
    	    x = f("s \
    		asd\
    		    tem");
    		ff;
    	}
        Also note that the "tem" line has an extra indent.  It appears that the
        brace matching doesn't work, because of the single " in the line.
    9   Wrong indent for cino=(4, removing the (void) fixes it: (Zellner)
    	(void) MyFancyFunction(
    			       argument);
    -   Make smartindenting configurable. Add 'sioptions', e.g. '#' setting the
        indent to 0 should be switched on/off.
    7   Support ANSI style function header, with each argument on its own line.
    -   "[p" and "]p" should use 'cindent' code if it's on (only for the first
        line).
    -   Add option to 'cindent' to set indent for comments outside of {}?
    -   Make a command to line up a comment after a code line with a previous
        comment after a code line.	Can 'cindent' do this automatically?
    7   Add 'j' flag to 'formatoptions': Remove comment leader when joining lines.
    -   formatting of struct/array inits:
        The lines used to initialize the struct or array above should not be
        considered 'continuation' lines just because the previous one does not end
        with ';'.  If you go back line by line I think it should be possible to
        tell the difference.  If you find a line that ends in ';', then it's OK to
        have continuation lines.  If you find a "{", and the character before it
        (not counting space & comments) is either ',' or '=', then there should
        not be continuation lines.	If the character before the "{" is another
        "{", then you have to check before that one too.
    -   When 'cindent'ing a '}', showmatch is done before fixing the indent.  It
        looks better when the indent is fixed before the showmatch. (Webb)
    -   Add option to make indenting work in comments too (for commented-out
        code), unless the line starts with "*".
    -   Don't use 'cindent' when doing formatting with "gq"?
    -   When formatting a comment after some text, insert the '*' for the new line
        (indent is correct if 'cindent' is set, but '*' doesn't get inserted).
    -   For smartindent: When typing 'else' line it up with matching 'if'.
    -   'smartindent': allow patterns in 'cinwords', for e.g. TeX files, where
        lines start with "\item".
    -   Support this style of comments (with an option): (Brown)
    	/* here is a comment that
    	is just autoindented, and
    	nothing else */
    -   Add words to 'cinwords' to reduce the indent, e.g., "end" or "fi".
    7   Use Tabs for the indent of starting lines, padd with spaces for
        continuation lines.  Allows changing 'tabstop' without messing up the
        indents.
        And/or: Add option to copy indent as-is, without changing spaces to tabs.

    Java:
    8   Can have {} constructs inside parens.  Include changes from Steve
        Odendahl?
    8   Recognize "import java.util.Vector" and use $CLASSPATH to find files for
        "[i" commands and friends.

    'comments':
    7   When using "comments=fg:--", Vim inserts three spaces for a new line.
        When hitting a TAB, these spaces could be removed.
    7   The 'n'esting flag doesn't do the indenting of the last (rightmost) item.
    6   Make strings in 'comments' option a RE, to be able to match more
        complicated things. (Phillipps)  Use a special flag to indicate that a
        regexp is used.
    8   Make the 'comments' option with "/* * */" lines only repeat the "*" line
        when there is a "/*" before it?  Or include this in 'cindent'?

    Virtual edit:
    7   Add a mode where the cursor is only allowed to go one character after the
        end of the line?
    7   Allow specifying it separately for Tabs and beyond end-of-line?

    Text objects:
    8   Add test script for text object commands "aw", "iW", etc.
    8   Add "gp" and "gP" commands: insert text and make sure there is a single
        space before it, unless at the start of the line, and after it, unless at
        the end of the line or befor a ".".
    7   Add "g{" and "g}" to move to the first/last character of a paragraph
        (instead of the line just before/after a paragraph as with "{" and "}").
    6   Ignore comment leaders for objects.  Make "das" work in reply-email.
    5   Make it possible to use syntax group matches as a text object.  For
        example, define a "ccItem" group, then do "da<ccItem>" to delete one.
        Or, maybe just define "dai", delete-an-item, to delete the syntax item the
        cursor is on.

    Select mode:
    7   Alt-leftmouse starts block mode selection in MS Word.
    7   Add Cmdline-select mode.  Like Select mode, but used on the command line.
        - Change gui_send_mouse_event() to pass on mouse events when 'mouse'
          contains 'C' or 'A'.
        - Catch mouse events in ex_getln.c.  Also shift-cursor, etc., like in
          normal_cmd().
        - remember start and end of selection in cmdline_info.
        - Typing text replaces the selection.

    Visual mode:
    -   When dragging the Visual selection with the mouse and 'scrolloff' is zero,
        behave like 'scrolloff' is one, so that the text scrolls when the pointer
        is in the top line.
    8   When using "I" or "A" in Visual block mode, short lines do not get the new
        text.  make it possible to add the text to short lines too, with padding
        where needed.
    8   What is "R" supposed to do in Visual mode?
    8   Make Visual mode local to the buffer.  Allow changing to another buffer.
        When starting a new Visual selection, remove the Visual selection in any
        other buffer. (Ron Aaron)
    7   Support dragging the Visual area to drop it somewhere else. (Aaron)
    7   With blockwise Visual mode and "c", "C", "I", "A", etc., allow the use of
        a <CR>.  The entered lines are repeated over the Visual area.
    7   CTRL-V :s should substitute only in the block, not to whole lines. (David
        Young is working on this)
    7   Filtering a block should only apply to the block, not to the whole lines.
        When the number of lines is increased, add lines. When decreased, padd with
        spaces or delete? Use ":`<,`>" on the command line.
    8   After filtering the Visual area, make "gv" select the filtered text?
        Currently "gv" only selects a single line, not useful.
    7   Don't move the cursor when scrolling?  Needed when the selection should
        stay the same.  Scroll to the cursor at any movement command.  With an
        option!
    7   In Visual block mode, need to be able to define a corner on a position
        that doesn't have text?  Also: when using the mouse, be able to select
        part of a TAB.  Even more: Add a mode where the cursor can be on a screen
        position where there is no text.  When typing, add spaces to fill the gap.
        Other solution: Always use curswant, so that you can move the cursor to
        the right column, and then use up/down movements to select the line,
        without changing the column.
    6   ":left" and ":right" should work in Visual block mode.
    7   For Visual mode: Command to do a search for the string in the marked area.
        Only when less than two lines. Use "g/" and "g?".
    7   CTRL-I and CTRL-O should work in Visual mode, but only jump to marks in the
        current buffer.
    7   CTRL-A and CTRL-X should increase/decrease all numbers in the Visual area.
    6   In non-Block mode, "I" should insert the same text in front of each line,
        before the first non-blank, "gI" in column 1.
    6   In non-Block mode, "A" should append the same text after each line.
    6   ":'<,'>source" should read the selected lines and ":source" them.
    6   When in blockwise visual selection (CTRL-V), allow cursor to be placed
        right of the line. Could also allow cursor to be placed anywhere on a TAB
        or other special character.
    6   Add commands to move selected text, without deselecting.

    More advanced repeating commands:
    -   Add "." command for visual mode: redo last visual command (e.g. ":fmt").
    -   Add "." command after operator: repeat last command of same operator. E.g.
        "c." will repeat last change, also when "x" used since then (Webb).
        "y." will repeat last yank.
        "c2." will repeat the last but one change?
        Also: keep history of Normal mode commands, add command to list the history
        and/or pick an older command.
    -   History stack for . command?  Use "g." command.

    Mappings and Abbreviations:
    8   Should mapping <C-A> and <C-S-A> both work?
    7   ":abbr b byte", append "b " to an existing word still expands to "byte".
        This is Vi compatible, but can we avoid it anyway?
    8   To make a mapping work with a prepended "x to select a register, store the
        last _typed_ register name and access it with "&.
    8   Add ":amap", like ":amenu".
    8   Add ":cab!", abbreviations that only apply to Command-line mode and not to
        entering search strings.
    8   Allow mapping of CTRL-@ (anywhere in the LHS).
    8   Give a warning when using CTRL-C in the lhs of a mapping.  It will never
        (?) work.
    8   Add a way to save a current mapping and restore it later.  Use a function
        that returns the mapping command to restore it: mapcmd()?  mapcheck() is
        not fool proof.  How to handle ambigious mappings?
    7   Add <0x8f> (hex), <033> (octal) and <123> (decimal) to <> notation?
    7   Allow mapping "Q" and "Q}" at the same time.  Need to put a flag with "Q",
        that it needs an extra character before it can match. See Vile 'maplonger'
        option.
    7   When someone tries to unmap with a trailing space, and it fails, try
        unmapping without the trailing space.  Helps for ":unmap xx | unmap yy".
    7   Make it possible to map 'wildchar', but only when it's a special character
        (like CTRL-E).  Currently it's only recognized when typed.  Useful for
        mapping a key to do something and then completion.
    6   Context-sensitive abbreviations: Specify syntax group(s) in which the
        abbreviations are to be used.
    -   Add mappings that take arguments.  Could work like the ":s" command.  For
        example, for a mouse escape sequence:
    	:mapexp  <Esc>{\([0-9]*\),\([0-9]*\);	H\1j\2l
    -   Add the possibility to enter mappings which are used whenever normal text
        could be entered.  E.g., for "f" command.  But not in Normal mode.  Sort
        of opposite of 'langmap'.  Use ":tmap" command?
    -   Make it possible to include a <Nul> in the lhs and rhs of a mapping.
    -   Add command to repeat a whole mapping ("." only repeats the last change in
        a mapping).  Also: Repeat a whole insert command, including any mappings
        that it included.  Sort-of automatic recording?
    -   Make it possible to undo all the commands from a mapping, including a
        trailing unfinished command, e.g. for ":map K iX^[r".
    -   Add an option to ":map" that makes it display the special keys in
        <> notation (e.g. <CR> instead of ^M).  Or just always do this?
    -   Include an option (or flag to 'cpoptions') that makes errors in mappings
        not flush the rest of the mapping (like nvi does).
    -   Use context sensitiveness of completion to switch abbreviations and
        mappings off for :unab and :unmap.
    6   When using mappings in Insert mode, insert characters for incomplete
        mappings first, then remove them again when a mapping matches.  Avoids
        that characters that are the start of some mapping are not shown until you
        hit another character.
    -   Add optional <Number> argument for mappings:
        :map <Number>q	     ^W^W<Number>G
        :map <Number>q<Number>t  ^W^W<Number1-1>G<Number2>l
        :map q<Char>	    :s/<Char>/\u\0/g
        Or implicit:
        :map q			<Register>d<Number>$
    -   Add mappings for replace mode: ":rmap".  How do we then enter mappings for
        non-replace Insert mode?
    -   Add separate mappings for Visual-character/block/line mode?
    6   Alias for Normal mode commands, works like :substitute?  Would allow
        mappings with arguments.
    -   Add 'mapstop' command, to stop recursive mappings.
    -   List mappings that have a raw escape sequence both with the name of the key
        for that escape sequence (if there is one) and the sequence itself.
    -   List mappings: Once with special keys listed as <>, once with meta chars as
        <M-a>, once with the byte values (octal?). Sort of "spell mapping" command?
    -   When entering mappings: Add the possibility to enter meta keys like they
        are displayed, within <>: <M-a>, <~@> or <|a>.
    -   Allow multiple arguments to :unmap.
    -   Command to show keys that are not used and available for mapping
        ":freekeys".
    -   Allow any character except white space in abbreviations lhs (Riehm).

    Incsearch:
    -   Add a limit to the number of lines that are searched for 'incsearch'?
    -   When incsearch used and hitting return, no need to search again in many
        cases, saves a lot of time in big files. (Slootman wants to work on this?)
        When not using special characters, can continue search from the last match
        (or not at all, when there was no match).  See oldmail/webb/in.872.
    -   With incsearch, use CTRL-N/CTRL-P to go to next/previous match, some other
        key to copy matched word to search pattern (Alexander Schmid).
    -   How to make a "package java.util" cause all classes in the package to be
        searched?  Also for "import java.util.*". (Mark Brophy)

    Searching:
    8   Would it be possible to allow ":23,45/pat/flags" to search for "pat" in
        lines 23 to 45?  Or does this conflict with Ex range syntax?
    8   Allow identical pairs in 'matchpairs'.  Restrict the search to the current
        line.
    7   Allow longer pairs in 'matchpairs'.  Use ~/vim/macros/matchit.vim as an
        example.
    8   Make it possible to define the character that "%" checks for in
        #if/#endif.  For nmake it's !if/!endif.
    -   For "%" command: set hierarchy for which things include other things that
        should be ignored (like "*/" or "#endif" inside /* */).
        Also: use "%" to jump from start to end of syntax region and back.
        Alternative: use matchit.vim
    8   "/:/e+1" gets stuck on a match at the end of the line.  Do we care?
    8   A pattern like "\([^a]\+\)\+" takes an awful long time.  Recognize that
        the recursive "\+" is meaningless and optimize for it.
        This one is also very slow on "/* some comment */": "^\/\*\(.*[^/]\)*$".
    7   Recognize "[a-z]", "[0-9]", etc. and replace them with the faster "\l" and
        "\d".
    8   Flags that apply to the whole pattern.
        This works for all places where a regexp is used.
        Add "\q" to not store this pattern as the last search pattern?
    8   Add an option not to use 'hlsearch' highlighting for ":s" and ":g"
        commands. (Kahn)  It would work like ":noh" is used after that command.
        Also: An extra flag to do this once, and a flag to keep the existing
        search pattern.
    -   Add \%h{group-name}; to search for a specific highlight group.
        Add \%s{syntax-group}; to search for a specific syntax group.
    -   Support Perl regexp.  Use PCRE (Perl Compatible RE) package. (Shade)
        Or translate the pattern to a Vim one.
        Don't switch on with an option for typed commands/mappings/functions, it's
        too confusing.  Use "\@@" in the pattern, to avoid incompatibilities.
    7   Add POSIX regexp, like Nvi, with 'extended' option?  It's like very-magic.
    -   Remember flags for backreferenced items, so that "*" can be used after it.
        Check with "\(\S\)\1\{3}". (Hemmerling)
    -   Add flags to search command (also for ":s"?):
        i	ignore case
        I	use case
        p	use Perl regexp syntax (or POSIX?)
        v	use Vi regexp syntax
        f	forget pattern, don't keep it for "n" command
        F   remember pattern, keep it for "n" command
        Perl uses these too:
        e	evaluate the right side as an expression (Perl only)
        m	multiple line expression (we don't need it)
        o	compile only once (Perl only)
        s	single line expression (we don't need it)
        x	extended regexp (we don't need it)
        When used after ":g" command, backslash needed to avoid confusion with the
        following command.
        Add 'searchflags' for default flags (replaces 'gdefault').
    -   Add command to display the last used substitute pattern and last used
        pattern. (Margo)  Maybe make it accessible through a register (like "/
        for search string)?
    7   Use T-search algorithm, to speed up searching for strings without special
        characters.  See C't article, August 1997.
    -   Add 'fuzzycase' option, so that case doesn't matter, and '-' and '_' are
        equivalent (for Unix filenames).
    -   Add 'v' flag to search command: enter Visual mode, with the matching text
        as Visual area. (variation on idea from Bertin)
    -   Searching: "/this//that/" should find "that" after "this".
    -   Add global search commands: Instead of wrapping at the end of the buffer,
        they continue in another buffer. Use flag after search pattern:
        a	for the next file in the argument list
        f	for file in the buffer list
        w	for file edited in a window.
        e.g. "/pat/f". Then "n" and "N" work through files too. "f" flag also for
        ":s/pat/foo/f"??? Then when 'autowrite' and 'hidden' are both not set, ask
        before saving files: "Save modified buffer "/path/file"? (Yes/Hide/No
        Save-all/hide-All/Quit) ".
    -   ":s/pat/foo/3": find 3rd match of "pat", like sed. (Thomas Koehler)
    -   Special characters in patterns:
        Inside []:
        \012  octal character
        \0x1a hex character
        \0<BS> \0<Esc>: special character
    7   When searching with 'n' give message when getting back where the search
        first started. Remember start of search in '/ mark.
    7   Add option that scrolls screen to put cursor in middle of screen after
        search always/when off-screen/never.  And after a ":tag" command.  Maybe
        specify how many lines below the screen causes a redraw with the cursor in
        the middle (default would be half a screen, zero means always).
    6   Support multiple search buffers, so macros can be made without side
        effects.
    7   From xvim: Allow a newline in search patterns (also for :s, can delete
        newline).  Add BOW, EOW, NEWL, NLORANY, NLBUTANY, magic 'n' and 'r', etc.
        [not in xvim:] Add option to switch on matches crossing ONE line boundary.
    7   Add ":iselect", a combination of ":ilist" and ":tselect". (Aaron)
        Also ":dselect".

    Undo:
    -   When accidentally hitting "R" instead of Ctrl-R, further Ctrl-R is not
        possible, even when typing <Esc> immediately. (Grahn)  Also for "i", "a",
        etc.  Postpone saving for undo until something is really inserted?
    8   Make undo more memory-efficient: Compare text before and after change,
        only remember the lines that really changed.
    7   Add an undo tree: When making a change, instead of clearing any future
        undo (thus redo) info, make a new branch.  How to navigate through the
        undo tree?
    -   For u_save() include the column number. This can be used to set '[ and '].
        And in the future the undo can be made more efficient (Webb).
    -   In out-of-memory situations: Free allocated space in undo, and reduce the
        number of undo levels (with confirmation).
    -   Instead of [+], give the number of changes since the last write: [+123].
        When undoing to before the last write, change this to a negative number:
        [-99].
    7   Make it possible to jump to the location of the last change.  Like doing
        "u" "CTRL-R". (Lange)  Keep a list of the 10 last changes or so. Use
        g_CTRL-O and g_CTRL-I?
    -   With undo with simple line delete/insert: optimize screen updating.
    -   When executing macro's: Save each line for undo only once.
    -   Store undo info in a file that survives until the next edit.  Then it's
        possible to undo to before the current editing session.  Combined with
        viminfo?
    -   When doing a global substitute, causing almost all lines to be changed,
        undo info becomes very big.  Put undo info in swap file??

    Buffer list:
    7   Command to execute a command in another buffer: ":inbuf {bufname} {cmd}".
        Also for other windows: ":inwin {winnr} {cmd}".  How to make sure that
        this works properly for all commands, and still be able to return to the
        current buffer/window?  E.g.: ":inbuf xxx only".
    8   Add File.{recent_files} menu entries: Recently edited files.
    8   Unix: Check all uses of fnamecmp() and fnamencmp() if they should check
        inode too.
    7   Add another number for a buffer, which is visible for the user.  When
        creating a new buffer, use the lowest number not in use. (or the highest
        number in use plus one?)
    7   Offer some buffer selection from the command line?  Like using ":ls" and
        asking for a buffer number. (Zachmann)
    -   When starting to edit a file that is already in the buffer list, use the
        file name argument for the new short file name. (Webb)
    -   Add an option to make ":bnext" and ":bprev" wrap around the end of the
        buffer list.  Also for ":next" and ":prev"?
    7   Add argument to ":ls" which is a pattern for buffers to list.
        E.g. ":ls *.c". (Thompson)
    7   Add expansion of buffer names, so that "*.c" is expanded to all buffer
        names.  Needed for ":bdel *.c", ":bunload *.c", etc.
    8   Support for <afile> where a buffer name is expected.
    8   Some commands don't use line numbers, but buffer numbers. '$'
        should then mean the number of the last buffer.  E.g.: "4,$bdel".
    7   Add an option to mostly use slashes in file names.  Separately for
        internal use and for when executing an external program?

    Swap (.swp) files:
    8   If writing to the swap file fails, should try to open one in another
        directory from 'dir'.  Useful in case the file system is full and when
        there are short file name problems.
    8   Also use the code to try using a short file name for the backup and swap
        file for the Win32 and Dos 32 bit versions.
    8   When the edited file is a symlink, try to put the swap file in the same
        dir as the actual file. Adjust FullName().	Avoids editing the same file
        twice (e.g. when using quickfix).  Also try to make the name of the backup
        file the same as the actual file?
        Use the code for resolve()?
    7   When using 64 bit inode numbers, also store the top 32 bits.  Add another
        field for this, using part of bo_fname[], to keep it compatible.
    7   When editing a file on removable media, should put swap file somewhere
        else.  Use something like 'r' flag in 'viminfo'. 'diravoid'?
        Also: Be able to specify minimum disk space, skip directory when not
        enough room.
    7   Add a configure check for which directory should be used: /tmp, /var/tmp
        or /var/preserve.
    -   Add an option to create a swap file only when making the first change to
        the buffer.  (Liang)  Or only when the buffer is not read-only.
    -   Add option to set "umask" for backup files and swap files (Antwerpen).
        'backupumask' and 'swapumask'?  Or 'umaskback' and 'umaskswap'?
    -   When editing a readonly file, don't use a swap file but read parts from the
        original file.  Also do this when the file is huge (>'maxmem').  We do
        need to load the file once to count the number of lines?  Perhaps keep a
        cached list of which line is where.

    Viminfo:
    7   Can probably remove the code that checks for a writable viminfo file,
        because we now do the chown() for root, and others can't overwrite someone
        else's viminfo file.
    8   Add argument to keep the list of buffers when Vim is started with a file
        name. (Schild)
    8   Keep the last used directory of the file browser (File/Open menu).
    8   Remember a list of last accessed files.  To be used in the
        "File.Open Recent" menu.  Default is to remember 10 files or so.
        Also remember which files have been read and written.  How to display
        this?
    7   Also store the ". register (last inserted text).
    7   Make it possible to store buffer names in viminfo file relative to some
        directory, to make them portable over a network. (Aaron)
    6   Store a snapshot of the currently opened windows.  So that when quitting
        Vim, and then starting again (without a file name argument), you see the
        same files in the windows.  Use ":mksession" code?
    -   Make marks present in .viminfo usable as file marks: Display a list of
        "last visited files" and select one to jump to.

    Modelines:
    8   Before trying to execute a modeline, check that it looks like one (valid
        option names).  If it's very wrong, silently ignore it.
        Ignore a line that starts with "Subject: ".
    -   When an option value is coming from a modeline, do not carry it over to
        another edited file?  Would need to remember the value from before the
        modeline setting.
    -   Allow setting a variable from a modeline?  Only allow using fixed strings,
        no function calls, to avoid a security problem.
    -   Allow ":doauto BufRead x.cpp" in modelines, to execute autocommands for
        .cpp files.
    -   Support the "abbreviate" command in modelines (Kearns).  Careful for
        characters after <Esc>, that is a security leak.
    -   Add option setting to ask user if he wants to have the modelines executed
        or not.  Same for .exrc in local dir.

    Options:
    8   Make ":mksession" store buffer-specific options for the specific buffer.
    8   With ":mksession" always store the 'sessionoptions' option, even when
        "options" isn't in it. (St-Amant)
    8   When using ":mksession", also store a command to reset all options to
        their default value, before setting the options that are not at their
        default value.
    8   Should ":mksession" restore the current directory when writing the
        session, or the directory where the session file is?  Probably need a word
        in 'sessionoptions' to make a choice:
        "curdir" (cd to current directory when session file was generated)
        "sessiondir" (cd to directory of session file)
        "nodir" (don't cd at all)
    8   Make "old" number options that really give a number of effects into string
        options that are a comma separated list.  The old number values should
        also be supported.
    8   Add commands to save and restore an option, which also preserves the flag
        that marks if the option was set.  Useful to keep the effect of setting
        'compatible' after ":syntax on" has been used.
    7   There is 'titleold', why is there no 'iconold'? (Chazelas)

    External commands:
    9   When filtering a buffer (e.g., to gunzip it) marks are changed when they
        shouldn't.  Add an option to switch of adjusting marks.  Use it for .gz
        files gunzipping and gzipping.
    8   When filtering text, redirect stderr so that it can't mess up the screen
        and Vim doesn't need to redraw it.  Also for ":r !cmd".
    4   Set separate shell for ":sh", piping "range!filter", reading text "r !ls"
        and writing text "w !wc". (Deutsche)  Allow arguments for fast start (e.g.
        -f).
    4   Allow direct execution, without using a shell.
    4   Run an external command in the background.  But how about I/O in the GUI?
        Careful: don't turn Vim into a shell!
    4   Add feature to disable using a shell or external commands.

    Multiple Windows:
    8   Diff mode: add a command like ":diffput" that only moves part of a diff
        block.
    6   Add an option to resize the shell when splitting and/or closing a window.
        ":vsp" would make the shell wider by as many columns as needed for the new
        window.  Specify a maximum size (or use the screen size). ":close" would
        shrink the shell by as many columns as come available. (Demirel)
    7   When starting Vim several times, instanciate a Vim server, that allows
        communication between the different Vims.  Feels like one Vim running with
        multiple top-level windows.  Esp. useful when Vim is started from an IDE
        too.  Requires some form of inter process communication.
    7   Run Vim as a server, and let other started Vims send an edit command to
        the server.  Consider patch from Brent Verner to add sockets interface?
        ~/vim/patches/verner_socket.tgz
        Or use the nedit way to communicate between a Vim server and client?
        Flemming Madsen offered to work on this.
    -   Support a connection to an external viewer.  Could call the viewer
        automatically after some seconds of non-activity, or with a command.
        Allow some way of reporting scrolling and cursor positioning in the viewer
        to Vim, so that the link between the viewed and edited text can be made.

    Marks:
    8   Add a command to jump to a mark and make the motion inclusive. g'm and g`m?
    8   When deleting lines, don't delete uppercase marks in them.  Move the mark
        to the nearest line.
    8   The '"' mark is set to the first line, even when doing ":next" a few times.
        Only set the '"' mark when the cursor was really moved in a file.
    8   Make `` and '', which would position the new cursor position in the middle
        of the window, restore the old topline (or relative position) from when
        the mark was set.
    7   Make a list of file marks in a separate window.  For listing all buffers,
        matching tags, errors, etc.  Normal commands to move around.  Add commands
        to jump to the mark (in current window or new window).  Start it with
        ":browse cmd"?
    6   Add a menu that lists the Marks like ":marks". (Amerige)
    7   For ":jumps", ":tags" and ":marks", for not loaded buffers, remember the
        text at the mark.  Highlight the column with the mark.
    7   Highlight each mark in some way (With "Mark" highlight group).
        Or display marks in a separate column, like 'number' does.
    7   Use d"m to delete rectangular area from cursor to mark m (like Vile's \m
        command).
    7   Try to keep marks in the same position when:
        - replacing with a line break, like in ":s/pat/^M/", move marks after the
          line break column to the next line. (Acevedo)
        - filtering lines, try to keep the marks in the filtered lines. Need to
          move some marks if the number of lines decreases.
        - changing text, e.g. when formatting with "gq".
        - inserting/deleting characters in a line.
    5   Include marks for start/end of the current word and section.  Useful in
        mappings.

    Digraphs:
    -   Make it possible to enter "r<C-E>" and "r<C-Y>" (get character from line
        below/above).
    -   Use digraph table to tell Vim about the collating sequence of special
        characters?
    -   Add command to remove (all) digraphs. (Brown)
    7   Support different sets of digraphs (depending on the character set?).  At
        least Latin1/Unicode, Latin-2, MS-DOS (esp. for Win32).

    Writing files:
    -   In vim_rename(), should lock "from" file when deleting "to" file for
        systems other than Amiga.  Avoids problems with unexpected longname to
        shortname conversion.
    8   write mch_isdevice() for Amiga, Mac, VMS, etc.
    8   When appending to a file, Vim should also make a backup and a 'patchmode'
        file.
    6   Add an option to write a new, numbered, backup file each time.  Like
        'patchmode', e.g., 'backupmode'.
    6   Make it possible to write 'patchmode' files to a different directory.
        E.g., ":set patchmode=~/backups/*.orig". (Thomas)
    6   Add an option to prepend something to the backup file name.  E.g., "#".
        Or maybe allow a function to modify the backup file name?
    8   Only make a backup when overwriting a file for the first time. Avoids
        loosing the original when writing twice. (Slootman)
    7   On non-Unix machines, also overwrite the original file in some situations
        (file system full, it's a link on an NFS partition).
    7   When editing a file, check that it has been change outside of Vim more
        often, not only when writing over it.  E.g., at the time the swap file is
        flushed.  Or every ten seconds or so (use the time of day, check it before
        waiting for a character to be typed).
    8   When a file was changed since editing started, show this in the status
        line of the window, like "[time]".
        Make it easier to reload all outdated files that don't have changes.
        Automatic and/or with a command.

    Substitute:
    -   :s///p prints the line after a substitution.
    -   With :s///c replace \&, ~, etc. when showing the replacement pattern.
    8   With :s///c allow scrolling horizontally when 'nowrap' is effective.
        Also allow a count before the scrolling keys.
    -   Add number option to ":s//2": replace second occurrence of string? Or:
        :s///N substitutes N times.
    -   Add answers to ":substitute" with 'c' flag, used in a ":global", e.g.:
        ":g/pat1/s/pat2/pat3/cg": 'A' do all remaining replacements, 'Q' don't do
        any replacements.
    7   Substitute in a block of text.  Use {line}.{column} notation in an Ex
        range, e.g.: ":1.3,$.5s" means to substitute from line 1 column 3 to the
        last line column 5.

    Mouse support:
    8   Add 'o' flag to 'mouse'?
    8   Add 'mouse' flag, which sets a behavior like Visual mode, but automatic
        yanking at the button-up event.  Or like Select mode, but typing gets you
        out of Select mode, instead of replacing the text. (Bhaskar)
    7   Checkout sysmouse() for FreeBSD console mouse support.
    -   Implement mouse support for the Amiga console.
    -   Using right mouse button to extend a blockwise selection should attach to
        the nearest corner of the rectangle (four possible corners).
    -   Precede mouse click by a number to simulate double clicks?!?
    -   When mouse click after 'r' command, get character that was pointed to.

    Crypt:
    8   Also crypt the swapfile, each block separately.  Change mf_write() and
        mf_read().  How to get b_p_key to these functions?

    Argument list:
    6   Add command to put all filenames from the tag files in the argument list.
        When given an argument, only use the files where that argument matches
        (like `grep -l ident`) and jump to the first match.
    6   Add command to form an args list from all the buffers?

    Registers:
    8   Don't display empty registers with ":display". (Etienne)
    -   When appending to a register, also report the total resulting number of
        lines.  Or just say "99 more lines yanked", add the "more".
    -   When inserting a register in Insert mode with CTRL-R, don't insert comment
        leader when line wraps?
    -   The ":@r" commands should take a range and execute the register for each
        line in the range.
    -   Add "P" command to insert contents of unnamed register, move selected text
    	to position of previous deleted (to swap foo and bar in " + foo")
    8   Should be able to yank and delete into the "/ register.
        How to take care of the flags (offset, magic)?
    7   Add ! register, for shell commands. (patch from Grenie)

    Various improvements:
    8   Add term entries for function keys on xterm with alt and ctrl (new in pl
        94).  E.g., Control adds ";5" in "<Esc>[20;5~".  Find a generic way to
        prepend a modifier in console mode, to avoid having to specify each
        individual modified key.
    7   Xterm sends <Esc>O3F for <M-End>.  Similarly for other <M-Home>, <M-Left>,
        etc.  Combinations of Alt, Ctrl and Shift are also possible.  Recognize
        these to avoid inserting the raw byte sequence, handle like the key
        without modifier (unless mapped).
    8   Add a watchpoint in the debug mode: An expression that breaks execution
        when evaluating to non-zero.
    7   Support ":browse edit" in console, using explorer.vim?
    6   Add "gG": like what "gj" is to "j": go to the N'th window line.
    8   Add command like ":normal" that accepts <Key> notation like ":map".
    9   Support ACLs on more systems.
    7   Add ModeMsgVisual, ModeMsgInsert, etc. so that each mode message can be
        highlighted differently.
    8   Allow using "**" as a wildcard in commands like ":next" and ":args".
    7   Add a message area for the user.  Set some option to reserve space (above
        the command line?).  Use an ":echouser" command to display the message
        (truncated to fit in the space).
    7   Add %s to 'keywordprg': replace with word under the cursor. (Zellner)
    8   Support printing on Unix.  Can use "lpansi.c" as an example. (Bookout)
    8   Add put command that replaces the text under it.  Esp. for blockwise
        Visual mode.
    7   Enhance termreponse stuff: Add t_CV(?): pattern of term response, use
        regexp: "\e\[[>?][0-9;]*c", but only check just after sending t_RV.
    7   Add "g|" command: move to N'th column from the left margin (after wrapping
        and applying 'leftcol').  Works as "|" like what "g0" is to "0".
    7   Add patch from Wall for this one ( ~/Mail/oldmail/wall/in.00019 ):
        'flipcase' variable: upper/lowercase pairs.
        Insert comma's between pairs and allow a range, make it look like
        'isfname'.  E.g. ":set flipcase=a-zA-Z,xX,23-33:143-153".  The colon to
        separate the from and to part is optional.
    7   Support setting 'equalprg' to a user function name.
    8   Add cursor-column highlighting.  Enable it with 'cursorcolumn' option, set
        highlighting with "CursorColumn" group.  Useful for aligning text.
        Also cursor-row highlighting.
    7   Highlight the characters after the end-of-line differently.
    7   When 'whichwrap' contains "l", "$dl" should join lines?
    7   Open a server socket (with an option for IP/port nr) to allow remote
        control.  Optionally with a password to restrict access.
        Use the Simple Sockets Library? (Campbell)
     Same sample code brent verner:	http://linux1.org/misc/vim_socket.tar.bz2
    8   Include a connection to an external program through a pipe?  See patches
        from Felbinger for a mathematica inteface.
        Or use emacs server kind of thing?
    8   Add an argument to configure to use $CFLAGS and not modify it? (Mooney)
    8   Enabling features is a mix of configure arguments and defines in
        feature.h.  How to make this consistent?  Feature.h is required for
        non-unix systems.  Perhaps let configure define CONF_XXX, and use #ifdef
        CONF_XXX in feature.h?  Then what should min-features and max-features do?
    8   Add "g^E" and "g^Y", to scroll a screen-full line up and down.
    6   Add ":timer" command, to set a command to be executed at a certain
        interval, or once after some time has elapsed. (Aaron)
    8   Add ":confirm" handling in open_exfile(), for when file already exists.
    8   Use confirm/dialog stuff to ask the user, when a file has changed outside
        of Vim, if he wants to reload it.  Triggered when focus gained, after
        shell command, when entering another buffer, etc..
        Also do this when editing a new file, and another application creates
        the file before doing ":w" in Vim.
        Also check if the file protection has changed.  When checking a file into
        RCS it is made read-only, when checking out it is made read-write.
    8   When quitting with changed files, make the dialog list the changed file
        and allow "write all", "discard all", "write some".  The last one would
        then ask "write" or "discard" for each changed file.  Patch in HierAssist
        does something like this. (Shah)
    7   Use growarray for replace stack.
    7   Have a look at viH (Hellenic or Greek version of Vim).  But a solution
        outside of Vim might be satisfactory (Haritsis).
    3   Make "2d%" work like "d%d%" instead of "d2%"?
    8   Make "more" prompt accept command characters, like "hit-enter" prompt?
        Or extend it with more commands, like "less": 'b' for back, 'j' for one
        line down, etc.
    8   For the "--more--" prompt, support the 'b'ack command for more commands.
    7   "g CTRL-O" jumps back to last used buffer.	Skip CTRL-O jumps in the same
        buffer.  Make jumplist remember the last ten accessed buffers?
    -   Keep a list of most recently used files for each window, use "[o" to go
        back (older file) and "]n" to go forward (newer file) (like ^O and ^I for
        jumps) (Webb). Use ":files" and ":ls" to list the files in history order.
    7   Add a history of recently accessed buffer.	Maybe make "2 CTRL-^" jump to
        the 2nd previously visited buffer, "3 CTRL-^" to the third, etc.  Or use
        "3 g CTRL-^" for this?
    7   Add an option to set the width of the 'number' column.  Eight positions is
        often more than needed.  Or adjust the width to the length of the file?
    -   Add code to disable the CAPS key when going from Insert to Normal mode.
    -   Set date/protection/etc. of the patchfile the same as the original file.
    -   Use growarray for termcodes[] in term.c
    -   Add <window-99>, like <cword> but use filename of 99'th window.
    -   Make a set of operations on list of names: expand wildcards, replace home
        dir, append a string, delete a string, etc.
    -   Remove mktemp() and use tmpname() only?  Ctags does this.
    -   When replacing environment variables, and there is one that is not set,
        turn it into an empty string?  Only when expanding options? (Hiebert)
    -   Option to set command to be executed instead of producing a beep (e.g. to
        call "play newbeep.au").
    -   Add option to show the current function name in the status line.  More or
        less what you find with "[[k", like how 'cindent' recognizes a function.
        (Bhatt).
    -   "[r" and "]r": like "p" and "P", but replace instead of insert (esp. for
        blockwise registers).
    -   Add 'timecheck' option, on by default.  Makes it possible to switch off the
        timestamp warning and question. (Dodt).
    -   Add an option to set the time after which Vim should check the timestamps
        of the files.  Only check when an event occurs (e.g., character typed,
        mouse moved).  Useful for non-GUI versions where keyboard focus isn't
        noticable.
    9   When using ":w <fname>" it's possible that this file is loaded in another
        buffer.  Give a warning right away, don't wait for a shell command.
    -   Make 'smartcase' work even though 'ic' isn't set (Webb).
    7   When formatting text, allow to break the line at a number of characters.
        Use an option for this: 'breakchars'?  Useful for formatting Fortran code.
    -   Add flag to 'formatoptions' to be able to format book-style paragraphs
        (first line of paragraph has larger indent, no empty lines between
        paragraphs).  Complements the '2' flag.  Use '>' flag when larger indent
        starts a new paragraph, use '<' flag when smaller indent starts a new
        paragraph.	Both start a new paragraph on any indent change.
    8   Allow using a trailing space to signal a paragraph that continues on the
        next line.  Can be used for continuous formatting.  Could use 'autoformat'
        option, which specifies a regexp which triggers auto-formatting (for one
        line). ":set autoformat=\\s$".
    -   Be able to redefine where a sentence stops.  Use a regexp pattern?
    -   Be able to redefine where a paragraph starts.  For "[[" where the '{' is
        not in column 1.
    6   Add ":cdprev": go back to the previous directory.  Need to remember a
        stack of previous directories.  We also need ":cdnext".
    7   Should ":cd" for MS-DOS go to $HOME, when it's defined?
    -   Make "gq<CR>" work on the last line in the file.  Maybe for every operator?
    8   findmatchlimit() should be able to skip comments.  Solves problem of
        matching the '{' in /* if (foo) { */ (Fiveash)
    -   findmatch() should be adjusted for Lisp.  See remark at get_lisp_indent().
    -   Add more redirecting of Ex commands:
    	:redir @> register  (append)
    	:redir #  bufname
    	:redir #> bufname   (append)
    	:redir =  variable
    	:redir => variable  (append)
    8   ":redir >$HOME/xxx" should work: expand file name argument of ":redir".
    -   Setting of options, specifically for a buffer or window, with
        ":set window.option" or ":set buffer.option=val".  Or use ":buffer.set".
        Also: "buffer.map <F1> quit".
    -   Add :delcr command:

    			    *:delcr*
         :[range]delcr[!]	Check [range] lines (default: whole buffer) for lines
    			ending in <CR>.  If all lines end in <CR>, or [!] is
    			used, remove the <CR> at the end of lines in [range].
    			A CTRL-Z at the end of the file is removed.  If
    			[range] is omitted, or it is the whole file, and all
    			lines end in <CR> 'textmode' is set.  {not in Vi}
    -   Should integrate addstar() and file_pat_to_reg_pat().
    -   When working over a serial line with 7 bit characters, remove meta
        characters from 'isprint'.
    -   Use fchdir() in init_homedir(), like in FullName().
    -   In win_update(), when the GUI is active, always use the scrolling area.
        Avoid that the last status line is deleted and needs to be redrawn.
    -   That "cTx" fails when the cursor is just after 'x' is Vi compatible, but
        may not be what you expect.  Add a flag in 'cpoptions' for this?  More
        general: Add an option to allow "c" to work with a null motion.
    -   Give better error messages by using errno (strerror()).
    -   Give "Usage:" error message when command used with wrong arguments (like
        Nvi).
    -   Make 'restorescreen' option also work for xterm (and others), replaces the
        SAVE_XTERM_SCREEN define.
    7   Support for ":winpos" In xterm: report the current window position.
    -   Give warning message when using ":set t_xx=asdf" for a termcap code that
        Vim doesn't know about.  Add flag in 'shortmess'?
    6   Add ":che <file>", list all the include paths which lead to this file.
    -   For a commandline that has several commands (:s, :d, etc.) summarize the
        changes all together instead of for each command (e.g. for the rot13
        macro).
    -   Add command like "[I" that also shows the tree of included files.
    -   Add command like ":ts" that shows the output of "[I" and asks for a match
        to jump to. (Zellner)
    -   ":set sm^L" results in ":set s" because short names of options are also
        expanded.  Is there a better way to do this?
    -   Add ":@!" command, to ":@" like what ":source!" is to ":source".
    8   Add ":@:!": repeat last command with forceit set.
    -   Should be possible to write to a device, e.g. ":w! /dev/null".
    -   Add 't_normal': Used whenever t_me, t_se, t_ue or t_Zr is empty.
    -   ":cab map test ^V| je", ":cunab map" doesn't work.	This is vi compatible!
    -   CTRL-W CTRL-E and CTRL-W CTRL-Y should move the current window up or down
        if it is not the first or last window.
    -   Include-file-search commands should look in the loaded buffer of a file (if
        there is one) instead of the file itself.
    7   Change 'nrformats' to include the leader for each format.  Example:
    	nrformats=hex:$,binary:b,octal:0
        Add setting of 'nrformats' to syntax files.
    -   'path' can become very long, don't use NameBuff for expansion.
    -   When unhiding a hidden buffer, put the same line at top of the window as
        the one before hiding it. Or: keep the same relative cursor position (so
        many percent down the windows).
    -   Make it possible for the 'showbreak' to be displayed at the end of the
        line.  Use a comma to separate the part at the end and the start of the
        line?  Highlight the linebreak characters, add flag in 'highlight'.
    -   Some string options should be expanded if they have wildcards, e.g.
        'dictionary' when it is "*.h".
    -   Use a specific type for number and boolean options, making it possible to
        change it for specific machines (e.g. when a long is 64 bit).
    -   Add option for <Insert> in replace mode going to normal mode. (Nugent)
    -   Add a next/previous possibility to "[^I" and friends.
    -   Add possibility to change the HOME directory.  Use the directory from the
        passwd file? (Antwerpen)
    -   When doing "[^I" or "[^D" add position to tag stack.
    -   Add command to put current position to tag stack: ":tpush".
    8   Add commands to push and pop all or individual options. ":setpush tw",
        ":setpop tw", ":setpush all".  Maybe pushing/popping all options is
        sufficient.  ":setflush" resets the option stack?
        How to handle an aborted mapping?  Remember position in tag stack when
        mapping starts, restore it when an error aborts the mapping?
    -   Use a builtin grep command for ":grep"?  Makes it possible to add the
        column number.
    -   Change ":fixdel" into option 'fixdel', t_del will be adjusted each time
        t_bs is set? (Webb)
    -   "gc": goto character, move absolute character positions forward, also
        counting newlines. "gC" goes backwards (Weigert).
    -   When doing CTRL-^, redraw buffer with the same topline (Demirel). Store
        cursor row and window height to redraw cursor at same percentage of window
        (Webb).
    -   Besides remembering the last used line number of a file, also remember the
        column. Use it with CTRL-^ et. al.
    -   When a window resizes, the line with the cursor should stay at the same
        percentage from the start of the window as it was before.
    -   Check for non-digits when setting a number option (careful when entering
        hex codes like 0xff).
    -   Add option to make "." redo the "@r" command, instead of the last command
        executed by it.  Also to make "." redo the whole mapping.  Basically: redo
        the last TYPED command.
    -   Support URL links for ^X^F in Insert mode, like for "gf".
    -   Add 'wwwpath', used like 'path' for when "gf" used on an URL?
    -   Support %name% expansion for "gf" on Windows.
    -   When finding an URL or file name, and it doesn't exist, try removing a
        trailing '.'.
    -   Add ":path" command modifier.  Should work for every command that takes a
        file name argument, to search for the file name in 'path'.	Use
        find_file_in_path().
    -   Highlight control characters on the screen: Shows the difference between
        CTRL-X and "^" followed by "X" (Colon).
    -   Integrate parsing of cmdline command and parsing for expansion.
    -   Create a program that can translate a .swp file from any machine into a
        form usable by Vim on the current machine.
    -   Add ":noro" command: Reset 'ro' flag for all buffers, except ones that have
        a readonly file. ":noro!" will reset all 'ro' flags.
    -   Add a variant of CTRL-V that stops interpretation of more than one
        character.	For entering mappings on the command line where a key contains
        several special characters, e.g. a trailing newline.
    -   Add regex for 'paragraphs' and 'sections': 'parare' and 'sectre'. Combine
        the two into a regex for searching. (Ned Konz)
    -   Make '2' option in 'formatoptions' also work inside comments.
    -   Add 's' flag to 'formatoptions': Do not break when inside a string. (Dodt)
    -   Add flag to 'formatoptions' to recognize the change of indent as the start
        of a new paragraph (for paragraphs without separating empty line, but extra
        indent for the new paragraph) (Leitner).
    -   When window size changed (with the mouse) and made too small, set it back
        to the minimal size.
    -   Add "]>" and "[<", shift comment at end of line (command;  /* comment */).
    -   Should not call cursorcmd() for each vgetc() in getcmdline().
    -   ":split file1 file2" adds two more windows (Webb).
    -   Don't give message "Incomplete last line" when editing binary file.
    -   Add ":a", ":i" for preloading of named buffers.
    -   Allow autowrite when doing ":e file" (with an option 'eaw').
    -   Allow a "+command" argument before each file name in the Vim command line:
        "vim +123 file1 +234 file2 +345 file3". ???
    -   When entering text, keep other windows on same buffer updated (when a line
        entered)?
    -   Check out how screen does output optimizing.  Apparently this is possible
        as an output filter.
    -   In dosub() regexec is called twice for the same line. Try to avoid this.
    -   Window updating from memline.c: insert/delete/replace line.
    -   Optimize ml_append() for speed, esp. for reading a file.
    -   V..c should keep indent when 'ai' is set, just like [count]cc.
    -   Updatescript() can be done faster with a string instead of a char.
    -   Screen updating is inefficient with CTRL-F and CTRL-B when there are long
        lines.
    -   Uppercase characters in ex commands can be made lowercase?
    8   Add option to show characters in text not as "|A" but as decimal ("^129"),
        hex ("\x81") or octal ("\201") or meta (M-x).  Nvi has the 'octal' option
        to switch from hex to octal.  Vile can show unprintable characters in hex
        or in octal.
    7   Tighter integration with xxd to edit binary files.  Make it more
        easy/obvious to use.  Command line argument?
    -   How does vi detect whether a filter has messed up the screen? Check source.
        After ":w !command" a wait_return?
    -   Improve screen updating code for doput() (use s_ins()).
    -   With 'p' command on last line: scroll screen up (also for terminals without
        insert line command).
    -   Use insert/delete char when terminal supports it.
    -   Optimize screen redraw for slow terminals.
    -   Optimize "dw" for long row of spaces (say, 30000).
    -   Add "-d null" for editing from a script file without displaying.
    -   In Insert mode: Remember the characters that were removed with backspace
        and re-insert them one at a time with <key1>, all together with <key2>.
    -   Amiga: Add possibility to set a keymap. The code in amiga.c does not work
        yet.
    -   Implement 'redraw' option.
    -   Add special code to 'sections' option to define something else but '{' or
        '}' as the start of a section (e.g. one shiftwidth to the right).
    -   Add 'indent' option: Always use this amount of indent when starting a new
        line and when formatting text.
    -   Use pipes for filtering on Unix.  Requires using fork() to be able to read
        and write at the same time, or some select() mechanism.
    7   Allow using Vim in a pipe: "ls | vim -u xxx.vim - | yyy".  Only needs
        implementing ":w" to stdout in the buffer that was read from stdin.
    8   Allow opening an unnamed buffer with ":e !cmd" and ":sp !cmd".  Vile can
        do it.
    -   Add commands like ]] and [[ that do not include the line jumped to.
    -   When :unab without matching "from" part and several matching "to" parts,
        delete the entry that was used last, instead of the first in the list.
    -   Add text justification option.
    -   Set boolean options on/off with ":set paste=off", ":set paste=on".
    -   After "inv"ing an option show the value: ":set invpaste" gives "paste is
        off".
    -   Check handling of CTRL-V and '\' for ":" commands that do not have TRLBAR.
    -   When a file cannot be opened but does exist, give error message.
    -   Amiga: When 'r' protection bit is not set, file can still be opened but
        gives read errors. Check protection before opening.
    -   When writing check for file exists but no permission, "Permission denied".
    -   If file does not exists, check if directory exists.
    -   MSDOS: although t_cv and t_ci are not set, do invert char under cursor.
    -   Settings edit mode: make file with ":set opt=xx", edit it, parse it as ex
        commands.
    -   ":set -w all": list one option per line.
    -   Amiga: test for 'w' flag when reading a file.
    -   :table command (Webb)
    -   Add new operator: clear, make area white (replace with spaces): "g ".
    -   Make it possible for a user to define a new operator.  Implementation with
        internal scripting language or Perl?
    -   Add command to ":read" a file at a certain column (blockwise read?).
    -   Add 'resizecmd' option: vi command to be executed when window is resized.
    -   Add sort of replace mode where case is taken from the old text (Goldfarb).
    -   Allow multiple arguments for ":read", read all the files.
    -   Support for tabs in specific columns: ":set tabcol=8,20,34,56" (Demirel).
    -   Add 'searchdir' option: Directories to search for file name being edited
        (Demirel).
    -   Modifier for the put command: Change to linewise, charwise, blockwise, etc.
    -   Add commands for saving and restoring options ":set save" "set restore",
        for use in macro's and the like.
    -   Keep output from listings in a window, so you can have a look at it while
        working in another window. Put cmdline in a separate window?
    -   Add possibility to put output of ex commands in a buffer or file, e.g. for
        ":set all".  ":r :set all"?
    -   'edit' option: When off changing the buffer is not possible (Really
        read-only mode).
    -   When the 'equalalways' option is set, creating a new window should not
        result in windows to become bigger. Deleting a window should not result in
        a window to become smaller (Webb).
    -   When resizing the whole Vim window, the windows inside should be resized
        proportionally (Webb).
    -   Include options directly in option table, no indirect pointers. Use
        mkopttab to make option table?
    -   When doing ":w dir", where "dir" is a directory name, write the current
        file into that directory, with the current file name (without the path)?
    -   Support for 'dictionary's that are sorted, makes access a lot faster
        (Haritsis).
    -   Add "^Vrx" on the command line, replace with contents of register x. Used
        instead of CTRL-R to make repeating possible. (Marinichev)
    -   Add "^Vb" on the command line, replace with word before or under the
        cursor?
    -   Option to make a .swp file only when a change is made (Templeton).
    -   Support mapping for replace mode and "r" command (Vi doesn't do this)?
    5   Add 'ignorefilecase' option: Ignore case when expanding file names.
        ":e ma<Tab>" would also find "Makefile" on Unix.
    8   Should be able to compile Vim in another directory, with $(srcdir) set to
        where the sources are. Add $(srcdir) in the Makefile in a lot of places.
        (Netherton)

    From Elvis:
    -   Use "instman.sh" to install manpages?
    -   Add ":alias" command.
    -   fontchanges recognized "\\fB" etc.
    -   Search patterns:
          \@	match word under cursor.
        but do:
          \@w	match the word under the cursor?
          \@W	match the WORD under the cursor?
    8   ":window" command:
        :win +	next window (up)
        :win ++	idem, wrapping
        :win -	previous window (down)
        :win --	idem, wrapping
        :win nr	to window number "nr"
        :win name	to window editing buffer "name"
    7   ":cc" compiles a single file (default: current one).  'ccprg'   option is
        program to use with ":cc".  Use ":compile" instead of ":cc"?

    From Nvi:
    -   'searchincr' option, alias for 'incsearch'?
    -   'leftright' option, alias for 'nowrap'?
    -   Have a look at "vi/doc/vi.chart", for Nvi specialities.
    8   Add 'keytime', time in 1/10 sec for mapping timeout?
    -   Add 'filec' option as an alternative for 'wildchar'.
    6   Support Nvi command names as an alias:
        :bg		    :hide
        :fg	fname	    :buf fname (with 'hidden' set?)
        :dis b	    :ls
        :Edit fname	    :split fname
        :Fg fname	    :sbuf fname (with 'hidden' set?)
        :Next	    :snext (can't do this, already use :Next)
        :Previous	    :sprevious
        :Tag	    :stag

    From xvi:
    -   CTRL-_ : swap 8th bit of character.
    -   Add egrep-like regex type, like xvi (Ned Konz) or Perl (Emmanuel Mogenet)

    From vile:
    -   When horizontal scrolling, use '>' for lines continuing right of a window.
    -   Support putting .swp files in /tmp: Command in rc.local to move .swp files
        from /tmp to some directory before deleting files.

    Far future and "big" extensions:
    -   Make it possible to run Vim inside a window of another program.  For
        Xwindows this can be done with XReparentWindow().
    -   Add a way of scrolling that leaves the cursor where it is.  Especially
        when using the scrollbar.  Typing a cursor-movement command scrolls back
        to where the cursor is.
    -   Make it easy to setup Vim for groups of users: novice vi users, novice
        Vim users, C programmers, xterm users, GUI users,...
    -   Change layout of blocks in swap file: Text at the start, with '\n' in
        between lines (just load the file without changes, except for Mac).
        Indexes for lines are from the end of the block backwards.  It's the
        current layout mirrored.
    -   Make it possible to edit a register, in a window, like a buffer.
    -   Add stuff to syntax highlighting to change the text (upper-case keywords,
        set indent, define other highlighting, etc.).
    -   Mode to keep C-code formatted all the time (sort of on-line indent).
    -   Several top-level windows in one Vim session.  Be able to use a different
        font in each top-level window.
    -   Allow editing beyond end of line, just like there are all spaces. Switch
        this on with an option or special Insert mode command. Also allow editing
        above start and below end of buffer.
    -   Smart cut/paste: recognize words and adjust spaces before/after them.
    -   Mode to keep text formatted while inserting/deleting.  Use soft/hard
        returns with an option to switch this off. (CR-LF can be used for Unix as
        a soft return).
    -   Add column numbers to ":" commands ":line1,line2[col1,col2]cmd".  Block
        can be selected with CTRL-V.  Allow '$' (end of line) for col2.
    -   Add open mode, use it when terminal has no cursor positioning.
    -   Special "drawing mode": a line is drawn where the cursor is moved to.
        Backspace deletes along the line (from jvim).
    -   Perform commands on multiple windows (:W%s/foo/bar/g), multiple arguments
        (:A) or multiple buffers (:B). Implement ":Bset", set option in all
        buffers.  Also ":Wset", set in all windows, ":Aset, set in all arguments
        and ":Tset", set in all files mentioned in the tags file.  Add buffer/arg
        range, like in ":2,5B%s/..." (do we really need this???) Add search
        string: "B/*.c/%s/.."?  Or ":F/*.c/%s/.."?
    -   Support for underlining (underscore-BS-char), bold (char-BS-char) and other
        standout modes switched on/off with , 'overstrike' option (Reiter).
    -   Add vertical mode (Paul Jury, Demirel): "5vdw" deletes a word in five
        lines, "3vitextESC" will insert "text" in three lines, etc..
    4   Recognize l, #, p as 'flags' to EX commands:
        :g/RE/#l shall print lines with line numbers and in list format.
        :g/RE/dp shall print lines that are deleted.
        POSIX: Commands where flags shall apply to all lines written: list,
        number, open, print, substitute, visual, &, z. For other commands, flags
        shall apply to the current line after the command completes.  Examples:
        :7,10j #l Join the lines 7-10 and print the result in list

    In November 1998 an inquiry was held to allow Vim users to vote for changes to
    Vim.  Each person was allowed to give 10 positive and 5 negative points to a
    list of items.  Below is the result.  This indicates the desire of users for
    certain changes.  This will be taken into account when deciding what to do
    next from the huge list above.

    The first number is the total number of votes.  The number in brackets is the
    portion of the total which were negative points.

    317  (-5)   add folding (display only a selected part of the text)
    252  (-10)  vertically split windows (side-by-side)
    197  (-3)   add configurable auto-indenting for many languages (like 'cindent')
    183  (-5)   fix all problems, big and small; make Vim more robust
    155  (-8)   add Perl compatible search pattern
    125  (-1)   search patterns that cross line boundaries
    125  (-1)   improve syntax highlighting speed
    116	    improve syntax highlighting functionality
    101	    add a menu that lists all buffers
    93   (-1)   improve the overall performance
    93   (-6)   multiple top-level windows for one running Vim
    90   (-4)   be able to edit the command line with Vi commands
    90   (-36)  add a shell window (to type and execute shell commands in)
    83	    add patterns to define sections/paragraphs for "{", "[[", "%", etc.
    81	    improve Visual block mode: more commands that work on blocks
    71   (-13)  reduce the size of the executable and the runtime memory use
    70   (-5)   improve the on-line help
    68	    improve "gq" formatting of text (left&right justified, 'comments')
    68   (-2)   improve multi-byte character support
    59   (-8)   improve the Visual Studio interface (VisVim)
    59   (-12)  make it possible to run Vim inside a window of another program
    58   (-11)  add an undo tree (be able to go back to any previous situation)
    57   (-9)   add support for loading a shared library that defines new commands
    54   (-1)   add a way to execute a command in multiple buffers/windows
    52	    improve the Perl interface
    51   (-10)  improve printing from gvim (File.Print menu entry)
    50   (-20)  make a "Vim lite" version, which is small and low on features
    47	    add a method to repeat a prev. executed change ("c.", "d.", etc.)
    44   (-8)   add more features to the internal scripting language
    37	    add a command to repeat a whole mapping (not only its last change)
    37   (-2)   add better support for editing files in projects (with ID utils)
    33   (-3)   add handling for buffer-changed outside of Vim (when reg. focus)
    28	    improve Insert mode completion
    28   (-14)  add persistent undo (undo to before the file was saved/loaded)
    25	    improve command line completion
    23   (-30)  be able to run a program in a Vim window, with an interface to it
    22	    improve the quickfix commands
    21   (-1)   add mappings and abbreviations local to a buffer
    21   (-6)   add a special window for editing option values, with short docs
    19   (-4)   add file locking
    18   (-1)   add a way to disable (error) messages for a moment
    17   (-5)   add encryption for loading/storing files and for the swapfile
    10	    improve the port for MacOS X Server aka Rhapsody
    10	    add Qt interface
    10   (-1)   add scope arguments to the ":tag" command (like Elvis)
    9    (-3)   improve the tutor (course for beginners)
    8	    improve the port for OS/2
    8    (-1)   add a stack for saving/restoring options
    8    (-3)   improve 'viminfo' (keeping information when quitting Vim)
    8    (-6)   improve the performance of Vim scripts (pre-parse them)
    7    (-2)   add more autocommand events (for ":cd", start Insert mode, etc.)
    6    (-4)   improve the TCL interface
    6    (-4)   add option to move the cursor where there is no text in Visual mode
    5	    improve the port for MacOS
    4	    improve the port for GTK
    4	    add Diff, Merge capability with CVS like in emacs.
    4    (-5)   add option not to move the cursor when using a scrollbar
    4    (-8)   add POSIX compatible search patterns
    3	    improve the port for X Window (use GTK, or Athena)
    3    (-2)   improve the Cscope interface
    3    (-14)  add option to move the cursor where there is no text in any mode
    2	    add support for Borland Delphi (to replace borland's def. editor)
    2	    add on-the-fly paragraph formatting / word wraps
    1	    improve the port for "EPOC 32"
    1	    add GUI to record/stop/play a keystroke macro
    0    (-2)   improve ":mksession" support (switch to a previously saved state)
    -1   (-1)   improve the port for * (fill in a system name at the *. E.g. VMS")
    -4   (-77)  add more GUI functions (requesters, menus, dialogs)
    -10  (-14)  add "open" mode, like the original Vi
    -10  (-15)  improve the OLE interface
    -10  (-17)  improve compatibility of the Ex mode
    -12  (-89)  add on-the-fly spell checking
    -13  (-24)  reduce the size of the distribution (harddisk usage)
    -13  (-32)  improve Vi compatibility
    -25  (-38)  add a lot of small features, instead of a few big ones
    -47  (-53)  improve the 16 bit DOS version (avoid out-of-memory problems)
    -81  (-123) improve gvim to fit in the MS-Windows look&feel (with an option)
    -110 (-136) stop changing Vim, it's fine as it is
    -117 (-122) remove functionality, there is too much of it

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