mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-19 10:53:58 +00:00
b8ba871bd9
files, curses, db, regex etc that we already have). The other glue will follow shortly. Obtained from: Keith Bostic <bostic@bostic.com>
148 lines
5.2 KiB
Plaintext
148 lines
5.2 KiB
Plaintext
CL: In single-line screens, have to press 'q' twice when quitting out
|
|
of a ":set all" display.
|
|
|
|
COMMON: There's a serious problem with error returns -- we need to separate
|
|
command failure from fatal error, consistently, over the entire source
|
|
tree.
|
|
|
|
We need to rework all of vi to have three return values:
|
|
|
|
0: success
|
|
1: vi error, continue
|
|
2: fatal error, die
|
|
|
|
Right now we don't recognize fatal errors for what they are.
|
|
|
|
VI: Change the screen scrolling to not eat user characters... i.e.
|
|
g/pattern/foo should not eat already entered chars.
|
|
|
|
COMMON: It's known that it's possible to sync the backing files in the
|
|
wrong manner, leaving backup files that aren't recoverable. This
|
|
is going to be left alone until we have a logging version of DB,
|
|
which will hopefully fix this (or at least make it possible to
|
|
easily do so).
|
|
|
|
COMMON: The complete list of POSIX.1 calls that can return EINTR are:
|
|
|
|
wait, waitpid, sleep, dup2, close, read, write,
|
|
fcntl(SETLCKW) tcsetattr, tcdrain
|
|
|
|
The problem is that technically, any system/library call can
|
|
return EINTR, so, while nvi blocks (most of?) the obvious ones,
|
|
someone may have to do a complete pass and block signals
|
|
everywhere.
|
|
|
|
COMMON: The vi main command loop should use the general-purpose overflow
|
|
and underflow routines. In addition, the vi command loop uses
|
|
unsigned longs -- should probably be fixed as a 32-bit unsigned
|
|
type, and then check to make sure it's never used as as variable
|
|
type again.
|
|
|
|
DB: When nvi edits files that don't have trailing newlines, it appends
|
|
one, regardless. This is required, by default, from POSIX.2.
|
|
|
|
COMMON: Open mode is not yet implemented.
|
|
|
|
COMMON: ^C isn't passed to the shell in the script windows as an interrupt
|
|
character.
|
|
|
|
COMMON: The options:
|
|
|
|
hardtabs, lisp, optimize, redraw, slowopen
|
|
|
|
are recognized, but not implemented. These options are unlikely
|
|
to be implemented, so if you want them you might want to say
|
|
something! I will implement lisp if anyone ever documents how it
|
|
worked.
|
|
|
|
COMMON: If you run out of space in the recovery directory, the recovery
|
|
file is left in place.
|
|
|
|
COMMON: Should "view" set a lock on the file?
|
|
|
|
COMMON: Field editing shouldn't be hard to add to nvi:
|
|
|
|
Field editing file template:
|
|
|
|
version #
|
|
field # row/column start row/column stop
|
|
label field # Label string
|
|
re field # Matching re string.
|
|
field # row/column start row/column stop
|
|
label field # Label string
|
|
re field # Matching re string.
|
|
|
|
<tab> moves to the next field
|
|
<bs> in column 0 moves to the previous field
|
|
|
|
COMMON: Let's rethink using an IPC mechanism:
|
|
|
|
Two way channel, with events passing in both directions.
|
|
|
|
Load into the same address space (else, how do file permissions) forks
|
|
in v_init -- screens get events from vi, vi gets events queued up from
|
|
screens.
|
|
|
|
Vi:
|
|
E_CHARACTER, /* Input character: e_c set. */
|
|
E_EOF, /* End of input (NOT ^D). */
|
|
E_ERR, /* Input error. */
|
|
E_INTERRUPT, /* Interrupt. */
|
|
E_REPAINT, /* Repaint: e_flno, e_tlno set. */
|
|
E_RESIZE, /* SIGWINCH: e_lno, e_cno set. */
|
|
E_SIGCONT, /* SIGCONT arrived. */
|
|
E_SIGFATAL, /* fatal signal arrived.
|
|
E_START, /* Start ex/vi. */
|
|
E_STOP, /* Stop ex/vi. */
|
|
E_STRING, /* Input string: e_csp, e_len set. */
|
|
|
|
Screen:
|
|
E_ADDSTR /* Add a string to the screen. */
|
|
E_ATTRIBUTE /* Screen attribute. */
|
|
E_BELL /* Beep/bell/flash the terminal. */
|
|
E_BUSY /* Display a busy message. */
|
|
E_CANONICAL /* Enter tty canonical mode. */
|
|
E_CLRTOEOL /* Clear to the end of the line. */
|
|
E_CURSOR /* Return the cursor location. */
|
|
E_DELETELN /* Delete a line. */
|
|
E_DISCARD /* Discard a screen. */
|
|
E_EXADJUST /* Ex: screen adjustment routine. */
|
|
E_FMAP /* Set a function key. */
|
|
E_GETKEY /* Get a key event. */
|
|
E_INSERTLN /* Insert a line. */
|
|
E_MOVE /* Move the cursor. */
|
|
E_MESSAGE /* Message or ex output. */
|
|
E_REFRESH /* Refresh the screen. */
|
|
E_RESIZE /* Resize two screens. */
|
|
E_SPLIT /* Split the screen. */
|
|
E_SUSPEND /* Suspend the editor. */
|
|
|
|
EX: It would be nice to inverse video the replaced text during
|
|
interactive substitute.
|
|
|
|
EX: The :args command should put the current file name out in reverse
|
|
video. This isn't going to be easy, currently only full lines can
|
|
be in reverse video, not just parts.
|
|
|
|
TK: We currently permit the user to change the lines, columns and term
|
|
edit options. Shouldn't that be illegal in tknvi?
|
|
|
|
VI: The strings found by searches should be highlighted until the next
|
|
character is entered.
|
|
|
|
VI: Display a split vi screen for the :help command.
|
|
|
|
VI: When getting a key for a continue screen, we should always read from
|
|
the terminal, not from a mapped key.
|
|
|
|
VI: The sentence, paragraph and section movement commands don't match
|
|
historic practice in some boundary cases. This should be left
|
|
alone until POSIX 1003.2 makes up its mind.
|
|
|
|
VI: The vs_sm_fill routine should scroll if possible, not always redraw.
|
|
|
|
VI: Think about setting a dirty/inuse bits on the lines of the SMAP
|
|
structure. That way the message routines could steal lines and
|
|
refresh would continue to work, because it would know not to touch
|
|
the lines that were in use.
|