mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-30 08:09:04 +00:00
84 lines
3.3 KiB
Plaintext
84 lines
3.3 KiB
Plaintext
Things useful to do for GNU Emacs:
|
|
|
|
* Primitive for random access insertion of part of a file.
|
|
|
|
* Making I/O streams for files, so that read and prin1 can
|
|
be used on files directly. The I/O stream itself would
|
|
serve as a function to read or write one character.
|
|
|
|
* If a file you can't write is in a directory you can write,
|
|
make sure it works to modify and save this file.
|
|
|
|
* Make dired's commands handle correctly the case where
|
|
ls has listed several subdirectories' contents.
|
|
It needs to be able to tell which directory each file
|
|
is really in, by searching backward for the line
|
|
which identifies the start of a directory.
|
|
|
|
* Add more dired commands, such as sorting (use the
|
|
sort utility through call-process-region).
|
|
|
|
* Make display.c record inverse-video-ness on
|
|
a character by character basis. Then make non-full-screen-width
|
|
mode lines inverse video, and display the marked location in
|
|
inverse video.
|
|
|
|
* VMS code to list a file directory. Make dired work.
|
|
|
|
Long range:
|
|
|
|
Ideas for extending GNU Emacs to deal with arbitrary character sets.
|
|
|
|
I would like GNU Emacs to be extended to handle all the world's alphabets
|
|
and word signs. I don't expect to have time to do such a thing in the next
|
|
few years, so here are my ideas on the best way to do it.
|
|
|
|
* Each graphic is represented by a sequence of ordinary 8-bit characters.
|
|
|
|
* All the characters that make up such a sequence have codes >= 0200.
|
|
|
|
* The first character of such a sequence is between 0200 and 0237.
|
|
|
|
* The remaining characters of such a sequence are all 0240 or higher.
|
|
|
|
* The first character of the sequence determines the number of characters
|
|
in the sequence. Thus, 0200...0207 could start two-character sequences,
|
|
0210...0227 could start three-character sequences, and 0230 could start
|
|
four-character sequences. (Codes 0231...0237 would be reserved.)
|
|
|
|
* Several common alphabets, and some mathematical symbols, would get
|
|
two-character sequences. (Probably Greek, Russian, Hebrew(?), Arabic(?),
|
|
Korean, and Japanese kana). The remaining alphabets, and some versions of
|
|
Chinese, would get three-character sequences. Other sets of Chinese
|
|
characters would get four-character sequences.
|
|
|
|
Each country that uses Chinese characters has its own standard character
|
|
set, and it is not easy to correlate them to avoid overlap. So there may
|
|
need to be several sets of Chinese characters. That is why they need so
|
|
much code space.
|
|
|
|
True support for Hebrew and Arabic requires dealing with the problem of
|
|
writing direction for mixed text; I don't know what to do for that.
|
|
|
|
* The functions that use syntax table would determine the
|
|
syntax of a sequence from its first character.
|
|
|
|
* Functions in indent.c for computing widths and columns would
|
|
determine the width of a sequence from its first character.
|
|
So would display routines.
|
|
|
|
* Only a few other editing routines would need any change. In
|
|
particular, searching and regexp matching might not need any change.
|
|
|
|
* Most of the work required would be in redisplay. The only case that
|
|
needs to be supported is with X windows, since ordinary terminals
|
|
can't display all these characters anyway.
|
|
|
|
* There might need to be code to translate files from this format
|
|
to whatever format is typically stored on disk.
|
|
|
|
|
|
I would be very unhappy with half-measures, such as support for
|
|
Japanese only.
|
|
|