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