TODO 17.2 KB
Newer Older
1
                                                                -*-outline-*-
Gerd Moellmann's avatar
Gerd Moellmann committed
2

3 4 5
If you are ready to start working on any of these TODO items, we
appreciate your help; please write to emacs-devel@gnu.org so we can be
aware that the problem is being addressed, and talk with you how to do
Dave Love's avatar
Dave Love committed
6
it best.  Since Emacs is an FSF-copyrighted package, please be
7 8 9
prepared to sign legal papers to transfer the copyright on your work
to the FSF.

10
* Small but important fixes needed in existing features:
11

Luc Teirlinck's avatar
Luc Teirlinck committed
12 13 14
** Make occur correctly handle matches that span more than one line,
   as well as overlapping matches.

Stefan Monnier's avatar
Stefan Monnier committed
15
** Fix the kill/yank treatment of invisible text.  At the moment,
Glenn Morris's avatar
Glenn Morris committed
16
  invisible text is placed in the kill-ring, so that the contents of
Stefan Monnier's avatar
Stefan Monnier committed
17 18
  the ring may not correspond to the text as displayed to the user.
  It ought to be possible to omit text which is invisible (due to a
Glenn Morris's avatar
Glenn Morris committed
19 20
  text-property, overlay, or selective display) from the kill-ring.

21 22 23 24
** Change the way define-minor-mode handles autoloading.
  It should not generate :require.  Or :require in defcustom
  should not be recorded in the user's custom-set-variables call.

25 26 27
** The buttons at the top of a custom buffer should not omit
  variables whose values are currently hidden.

28 29 30 31 32
** Clean up the variables in browse-url.  Perhaps use a shell command string to
  specify the browser instead of the mushrooming set of functions.
  See also ESR's proposal for a BROWSER environment variable
  <URL:http://www.catb.org/~esr/BROWSER/browse-url.patch>.

33 34 35 36
** Enhance scroll-bar to handle tall line (similar to line-move).

** Make occur handle multi-line matches cleanly with context.

37
* Important features:
38

39
** Provide user-friendly ways to list all available font families,
40 41
   list fonts, display a font as a sample, etc.  [fx is looking at
  multilingual font selection for Emacs 22.]
42

43 44
** Rewrite the face code to be simpler, clearer and faster.

45
** Program Enriched mode to read and save in RTF.  [Is there actually a
Dave Love's avatar
Dave Love committed
46 47
  decent single definition of RTF?  Maybe see info at
  http://latex2rtf.sourceforge.net/.]
48

49
** Implement something better than the current Refill mode.  This
50 51
  probably needs some primitive support.

52
** Add a command to make a "Local Variables" section in the current buffer
53 54
  and/or add a variable to the list.

55
** Implement primitive and higher-level functions to allow filling
56 57
  properly with variable-pitch faces.

58
** Implement a smoother vertical scroll facility, one that allows
Stefan Monnier's avatar
Stefan Monnier committed
59 60
  C-v to scroll through a tall image.  The primitive operations
  posn-at-point and posn-at-x-y should now make it doable in elisp.
61

62 63 64
** Implement intelligent search/replace, going beyond query-replace
  (see http://graphics.csail.mit.edu/~rcm/chi04.pdf).

65 66 67
** Implement other text formatting properties.
*** Footnotes that can appear either in place or at the end of the page.
*** text property that says "don't break line in middle of this".
68 69
   Don't break the line between two characters that have the
   same value of this property.
70
*** Discretionary hyphens that are not visible when they are at end of line.
71

72
** Make movemail work with IMAP.
73

74 75
** Internationalize Emacs's messages.

76 77
** Install mmc@maruska.dyndns.org's no-flicker change.

78 79 80 81
** Add a "current vertical pixel level" value that goes with point,
  so that motion commands can also move through tall images.
  This value would be to point as window-vscroll is to window-start.

82 83
** Address internationalization of symbols names essentially
  as documentation, e.g. in command names and Custom.
84

85
** Make the Lucid menu widget display multilingual text.  [This
Dave Love's avatar
Dave Love committed
86 87
  probably needs to be done from actual Emacs buffers, either directly
  in the menu or by rendering in an unmapped window and copying the
Stefan Monnier's avatar
Stefan Monnier committed
88 89
  pixels.  The current code assumes a specific locale; that isn't good
  enough even if X can render the arbitrary text] [The gtk
Dave Love's avatar
Dave Love committed
90 91
  port now displays multilingual text in menus, but only insofar as
  Emacs can encode it as utf-8 and gtk can display the result.]
Stefan Monnier's avatar
Stefan Monnier committed
92 93
  Maybe making Lucid menus work like Gtk's (i.e. just force utf-8) is good
  enough now that Emacs can encode most chars into utf-8.
94

95
** Remove the limitation that window and frame widths and heights can
96 97
  be only full columns/lines.

98 99
* Other features we would like:

100 101 102
** Create a category of errors called `process-error'
  for some or all errors associated with using subprocesses.

103 104 105
** Maybe reinterpret `parse-error' as a category of errors
  and put some other errors under it.

106 107 108 109
** A function to tell you the argument pattern of functions.

** Make byte-compile warn when a doc string is too wide.

110 111 112 113 114 115
** A function to check for customizable options that have been
  set but not saved, and ask the user whether to save them.
  This could go in kill-emacs-query-functions, to remind people
  to save their changes. If the user says yes, show them
  in a Custom buffer using customize-customized.

116 117 118 119 120 121
** Emacs Lisp mode could put an overlay on the defun for every
  function that has advice.  The overlay could have `after-text' like "
  [Function has advice]".  It might look like
     (defun foo [Function has advice] (x y) 
  The overlay could also be a button that you could use to view the advice.

Stefan Monnier's avatar
Stefan Monnier committed
122 123 124 125
** ange-ftp
*** understand sftp
*** Use MLS for ange-ftp-insert-directory if a list of files is specified.

126 127 128 129
** Ability to map a key, including all modified-combinations.
   E.g map mouse-4 to wheel-up as well as M-mouse-4 -> M-wheel-up
   M-C-mouse-4 -> M-C-wheel-up, H-S-C-M-s-double-mouse-4 ->
   H-S-C-M-s-double-wheel-up, ...
130

131 132 133 134 135 136 137 138 139 140
** Beefed-up syntax-tables.
*** recognize multi-character syntactic entities like `begin' and `end'.
*** nested string-delimiters (for Postscript's (foo(bar)baz) strings).
*** support for infix operators (with precedence).
*** support for the $ (paired delimiter) in parse-partial-sexp.
*** support for hook-chars whose effect on the parsing-state is specified
	by elisp code.  Thus a char could both close a string and open a comment
	at the same time and do it in a context-sensitive way.
*** ability to add mode-specific data to the partial-parse-state.

141 142
** Add a way to convert a keyboard macro to equivalent Lisp code.

143
** Have a command suggestion help system that recognizes patterns
144 145
  of commands which could be replaced with a simpler common command.
  It should not make more than one suggestion per 10 minutes.
146

147
** Add a way to define input methods by computing them (when first used)
148 149 150 151
  from other input methods.  Then redefine C-x 8 to use a
  user-selected input method, with the default being the union of
  latin-1-prefix and latin-1-postfix.

152
** Implement a clean way to use different major modes for
153 154 155
  different parts of a buffer.  This could be useful in editing
  Bison input files, for instance, or other kinds of text
  where one language is embedded in another language.
Dave Love's avatar
#  
Dave Love committed
156

157 158 159 160
** Arrange a way for an input method to return the first character
  immediately, then replace it later.  So that C-s a with
  input method latin-1-postfix would immediately search for an a.

161
** Give start-process the ability to direct standard-error
Dave Love's avatar
#  
Dave Love committed
162 163
  output to a different filter.

164
** Make desktop.el save the "frame configuration" of Emacs (in some
Dave Love's avatar
#  
Dave Love committed
165 166
  useful sense).

167
** Give desktop.el a feature to switch between different named
168 169
  desktops.

170
** Replace finder.el with something that generates an Info file
Dave Love's avatar
Dave Love committed
171 172
  which gives the same information through a menu structure.  [Dave
  Love started on this.]
Dave Love's avatar
#  
Dave Love committed
173

174 175
** Add a cpio mode, more or less like tar mode.

176
** Implement a variant of uncompress.el or jka-compr.el that works with
Dave Love's avatar
Dave Love committed
177 178 179
  GNU Privacy Guard for encryption.  [Code exists but isn't assigned.
  See the Gnus development sources for assigned code concerning GPG
  use with mail, which is probably a good start.]
Dave Love's avatar
#  
Dave Love committed
180

181 182
** Save undo information in special temporary files, and reload it
  when needed for undoing.  This could extend undo capacity.
Dave Love's avatar
#  
Dave Love committed
183

184
** Change the Windows NT menu code
Dave Love's avatar
#  
Dave Love committed
185 186 187 188 189 190
  so that it handles the deep_p argument and avoids
  regenerating the whole menu bar menu tree except
  when the user tries to use the menubar.

  This requires the RIT to forward the WM_INITMENU message to
  the main thread, and not return from that message until the main
191
  thread has processed the MENU_BAR_ACTIVATE_EVENT and regenerated
Dave Love's avatar
#  
Dave Love committed
192
  the whole menu bar.  In the mean time, it should process other messages.
Gerd Moellmann's avatar
Gerd Moellmann committed
193

194
** Get some major packages installed: W3 (development version needs
Dave Love's avatar
Dave Love committed
195
  significant work), PSGML.  Check the assignments file for other
Juanma Barranquero's avatar
Juanma Barranquero committed
196
  packages which might go in and have been missed.
Dave Love's avatar
Dave Love committed
197

198
** Make keymaps a first-class Lisp object (this means a rewrite of
Stefan Monnier's avatar
Stefan Monnier committed
199 200 201
  keymap.c).  What should it do apart from being opaque ?
  multiple inheritance ?  faster where-is ?  no more fix_submap_inheritance ?
  what else ?
Dave Love's avatar
Dave Love committed
202

203
** Provide real menus on ttys.  The MS-DOS implementation can serve as
Dave Love's avatar
Dave Love committed
204 205
  an example how to do part of this.

206
** Implement popular parts of the rest of the CL functions as compiler
Dave Love's avatar
Dave Love committed
207 208
  macros in cl-macs.

209 210 211 212
** Make compiler warnings about functions that might be undefined at run time
 smarter, so that they know which files are required by the file being
 compiled and don't warn about functions defined in them.

213
** Highlight rectangles (`mouse-track-rectangle-p' in XEmacs).  Already in CUA,
Juanma Barranquero's avatar
Juanma Barranquero committed
214
  but it's a valuable feature worth making more general.
Dave Love's avatar
Dave Love committed
215

216
** Support simultaneous tty and X frames.
Dave Love's avatar
Dave Love committed
217

218
** Provide MIME support for Rmail using the Gnus MIME library.  [Maybe
Dave Love's avatar
Dave Love committed
219 220
  not now feasible, given Gnus maintenance decisions.  fx looked at
  this and can say where some of the problems are.]
Dave Love's avatar
Dave Love committed
221

222
** Eliminate the storm of warnings concerning char/unsigned char
Dave Love's avatar
Dave Love committed
223 224 225
  mismatches that we get with proprietary compilers on various systems.
  They make it difficult to spot the important warnings.

226
** Fix anything necessary to use `long long' EMACS_INTs with GCC.
Dave Love's avatar
Dave Love committed
227

228
** Split out parts of lisp.h and generate Makefile dependencies
Dave Love's avatar
Dave Love committed
229 230
  automatically.

231
** Update the FAQ.
Dave Love's avatar
Dave Love committed
232

233
** Allow auto-compression-mode to use zlib calls if zlib is available.
Dave Love's avatar
Dave Love committed
234
  [It's required for PNG, so may be linked anyhow.]
Dave Love's avatar
Dave Love committed
235

236
** Add a --pristine startup flag which does -q --no-site-file plus
Dave Love's avatar
Dave Love committed
237 238 239
  ignoring X resources (Doze equivalents?) and most of the
  environment.  What should not be ignored needs consideration.

240
** Investigate using the language environment (or locale?) to set up
Dave Love's avatar
Dave Love committed
241
  more things, such as the default Ispell dictionary, calendar
242
  holidays, quoting characters, space after periods and colons, ...
Dave Love's avatar
Dave Love committed
243

244
** Improve the GC (generational, incremental).  (We may be able to use
Dave Love's avatar
Dave Love committed
245 246
  the Boehm collector.)  [See the Boehm-GC branch in CVS for work on
  this.]
Gerd Moellmann's avatar
Gerd Moellmann committed
247

248
** Check what hooks would help Emacspeak -- see the defadvising in W3.
Dave Love's avatar
Dave Love committed
249

250
** Add horizontal scroll bars.
Dave Love's avatar
Dave Love committed
251

252
** Provide an optional feature which computes a scroll bar slider's
253
  size and its position from lines instead of characters.
Dave Love's avatar
Dave Love committed
254

255
** Add support for SVG (Scalable Vector Graphics) rendering to
Gerd Moellmann's avatar
Gerd Moellmann committed
256
  Emacs.
Gerd Moellmann's avatar
Gerd Moellmann committed
257

258
** Allow unknown image types to be rendered via an external program
259 260
  converting them to, say, PBM (in the same way as PostScript?).

261
** Allow displaying an X window from an external program in a buffer,
262 263 264
  e.g. to render graphics from Java applets.  [gerd and/or wmperry
  thought this was feasible.]

265
** Allow images (not just text) in the margin to be mouse-sensitive.
266 267 268
  (Requires recursing through display properties).  Provide some way
  to simulate mouse-clicks on marginal text without a mouse.

269
** Implement Lisp functions to determine properly whether a character
270 271 272 273 274 275 276
  is displayable (particularly needed in XFree 4, sigh).  Use it to
  define useful glyphs that may be displayed as images or unicodes
  (with ASCIIfied fallback via latin1-disp).  Examples include
  box-drawing graphics in Custom buffers, W3 rules and tables, and
  tree displays generally, mode-line mail indicator.  [See work done
  already for Emacs 22 and consult fx.]

277
** Do something to make rms happy with fx's dynamic loading, and use it
278 279 280
  to implement things like auto-loaded buffer parsers and database
  access in cases which need more than Lisp.

281
** Extend ps-print to deal with multiple font sizes, images, and extra
282 283
  encodings.

284
** Provide portable undumping using mmap (per gerd design).
285

286 287 288
** Make byte-compile avoid binding an expanded defsubst's args
when the body only calls primitives.

289
** Use the XIE X extension, if available, for image display.
Gerd Moellmann's avatar
Gerd Moellmann committed
290

291
** Make monochrome images display using the foreground and background
292 293
  colors of the applicable faces.

294 295
** Face remapping.

296 297 298
** Optionally make the cursor a little thinner at the end of a line
  or the end of the buffer.

299
** Add support for rendering antialiased text, probably using
Colin Walters's avatar
Colin Walters committed
300
  XRender/Freetype.
Colin Walters's avatar
Colin Walters committed
301

302
** Port the conservative stack marking code of Emacs' garbage collector
303 304
  to more systems, so that we can completely get rid of GCPROs.

305
** Reorder defcustom's in each package so that the more important
306 307 308 309 310
  options come first in the Customize buffers.  This could be done by
  either rearranging the file (since options are shown in the order
  they appear in the *.el files), or by adding a few :set-after
  attributes.

311
** Maybe document the features of libraries missing from the manual (or
312 313 314 315 316 317
  ancillary manuals, including the Lisp manual in some cases).
  This is not worth doing for all of these packages and we need not
  aim for completeness, but some may be worth documenting.

  Here's a list which is probably not complete/correct: align, allout,
  artist, ansi-color, array, battery, calculator, cdl, cmuscheme,
Kim F. Storm's avatar
...  
Kim F. Storm committed
318
  completion, cua, delim-col, dirtrack, double, echistory, elide-head,
319 320 321 322 323 324 325 326 327 328 329 330
  easymenu, expand, flow-ctrl, format [format-alist],
  generic/generic-x [various modes], kermit, log-edit, ledit
  [obsolete?], makesum, midnight [other than in Kill Buffer node],
  mouse-copy [?], mouse-drag, mouse-sel, net-utils, rcompile,
  snmp-mode [?], soundex [should be interactive?], strokes [start from
  the web page], talk, thingatpt [interactive functions?], type-break,
  vcursor, xscheme, zone-mode [?], mlconvert [?], iso-cvt, iso-swed,
  swedish, feedmail [?], uce, bruce, gametree, meese, page-ext,
  refbib, refer, scribe, sgml-mode, spell, texinfo, underline,
  cmacexp, hideif, mantemp [obsolete?], pcomplete, assoc, xml,
  cvs-status (should be described in PCL-CVS manual); other progmodes,
  probably in separate manual.
Juanma Barranquero's avatar
Juanma Barranquero committed
331

332
** Convert the XPM bitmaps to PPM, replace the PBMs with them and scrap
Dave Love's avatar
Dave Love committed
333 334 335
  the XPMs so that the colour versions work generally.  (Requires care
  with the colour used for the transparent regions.)

336
** Convenient access to the `values' variable.  It would be nice to have an
Juanma Barranquero's avatar
Juanma Barranquero committed
337 338 339
  interface that would show you the printed reps of the elements of the
  list in a menu, let you select one of the values, and put it into some
  other variable, without changing the value of `values'.
Dave Love's avatar
Dave Love committed
340

341
** (Controlled by a flag) make open and close syntax match exactly,
Dave Love's avatar
Dave Love committed
342 343
  i.e. `(' doesn't match `]'.

344
** Specify parameter ID-FORMAT in all calls to `file-attributes' and
345 346 347 348 349 350 351
  `directory-files-and-attributes' where attributes UID or GID are used.
  Whenever possible, use value 'string.
  When done, change meaning of default value from 'integer to 'string.
  If value 'integer is used nowhere, remove the parameter ID-FORMAT from
  the definition of `file-attributes' and `directory-files-and-attributes'
  and from the calls.

Kenichi Handa's avatar
Kenichi Handa committed
352 353 354 355 356 357 358 359
** Make language-info-alist customizable.  Currently a user can customize
  only the variable `current-language-environment'.

** Improve language environment handling so that Emacs can fit
  better to a users locale.  Currently Emacs uses utf-8 language
  environment for all utf-8 locales, thus a user in ja_JP.UTF-8 locale
  are also put in utf-8 lang. env.  In such a case, it is
  better to use Japanese lang. env. but prefer utf-8 coding system.
Kenichi Handa's avatar
Kenichi Handa committed
360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375

** Eliminate the current restriction on header printing by ps-print.
  Currently, a header can contain only single 1-byte charset in
  addition to ASCII.

** In ps-print, provide an user friendly interface to specify fonts.

** OpenType font support for various complex scripts (e.g. Devanagari).
  As X protocal doesn't provide a way to access OpenType Layout Tables
  in a OpenType font of a server side, we need a way to utilize local
  fonts (perhaps by directly using the Freetype library or indirectly
  via Xft library).

** Enhance word boundary detection for such a script that doesn't use
  space at word boundary (e.g. Thai).

Kenichi Handa's avatar
Kenichi Handa committed
376 377 378 379
** Implement interface programs with major Japanese conversion server
  in lib-src so that they can be used from the input method
  "japanese".  Currently, most Japanese users are using external
  packages (e.g. tamago, anthy) or an input method via XIM.
Kenichi Handa's avatar
Kenichi Handa committed
380

Nick Roberts's avatar
Nick Roberts committed
381 382 383
** Provide the toolbar on ttys. This could map a bit like tmm-menubar
   for the menubar and buttons could look a bit like those used by customize.

384 385 386 387 388 389 390 391 392 393 394
* Internal changes

** Replace gmalloc.c with the modified Doug Lea code from the current
  GNU libc so that the special mmapping of buffers can be removed --
  that apparently loses under Solaris, at least.  [fx has mostly done
  this.]

** Rewrite make-docfile to be clean and maintainable.

** Add an inferior-comint-minor-mode to capture the common set of operations
   offered by major modes that offer an associated inferior
Stefan Monnier's avatar
Stefan Monnier committed
395 396 397
   comint-derived mode.  I.e. basically make cmuscheme.el/inf-lisp.el generic.
   For use by sml-mode, python-mode, tex-mode, scheme-mode, lisp-mode,
   haskell-mode, tuareg-mode, ...
398

Stefan Monnier's avatar
Stefan Monnier committed
399 400 401 402 403
* Other known bugs:

** a two-char comment-starter whose two chars are symbol constituents will
not be noticed if it appears within a word.

404 405 406
** Fix unexelf.c to handle the .data.rel and .data.rel.local
   sections made by GCC 3.4 on IRIX.

Miles Bader's avatar
Miles Bader committed
407
;;; arch-tag: b0a3e40b-726a-457d-9999-ba848321b036