Commit | Line | Data |
---|---|---|
3224dac1 | 1 | -*- coding: utf-8; mode: text; -*- |
28d440ab KL |
2 | GOAL |
3 | ---- | |
4 | ||
856dd475 KL |
5 | This branch implements support for opening multiple, different tty |
6 | devices and simultaneous X and tty frames from a single Emacs session. | |
28d440ab | 7 | |
7b00d185 | 8 | Some use cases: |
7b00d185 KL |
9 | Emacs is notoriously slow at startup, so most people use another |
10 | editor or emacsclient for quick editing jobs from the console. | |
11 | Unfortunately, emacsclient was very awkward to use, because it did not | |
12 | support opening a new Emacs frame on the current virtual console. | |
13 | Now, with multi-tty support, it can do that. (Emacsclient starts up | |
14 | faster than vi!) | |
15 | ||
16 | Some Gnus users (including me) run Gnus in an X frame in its own Emacs | |
17 | instance, which they typically leave running for weeks. It would be | |
18 | nice if they could connect to this instance from a remote ssh session | |
19 | and check their messages without opening a remote X frame or resorting | |
20 | to gnus-slave. | |
21 | ||
28d440ab KL |
22 | WHO IS DOING IT |
23 | --------------- | |
24 | ||
25 | I'm Károly Lőrentey. My address: lorentey@elte.hu. | |
26 | ||
422f68e0 KL |
27 | Comments, bug reports, suggestions and patches are welcome; send them |
28 | to multi-tty@lists.fnord.hu. | |
29 | ||
856dd475 KL |
30 | The following is a (sadly incomplete) list of people who have |
31 | contributed to the project by testing, submitting patches, bug | |
32 | reports, and suggestions. Thanks! | |
33 | ||
34 | ARISAWA Akihiro <ari at mbf dot ocn dot ne dot jp> | |
1a27213c | 35 | Vincent Bernat <bernat at luffy dot cx> |
856dd475 KL |
36 | Han Boetes <han at mijncomputer dot nl> |
37 | Robert J. Chassell <bob at rattlesnake dot com> | |
38 | Romain Francoise <romain at orebokech dot com> | |
39 | Ami Fischman <ami at fischman dot org> | |
40 | Friedrich Delgado Friedrichs <friedel at nomaden dot org> | |
41 | IRIE Tetsuya <irie at t dot email dot ne dot jp> | |
42 | Yoshiaki Kasahara <kasahara at nc dot kyushu-u dot ac dot jp> | |
43 | Jurej Kubelka <Juraj dot Kubelka at email dot cz> | |
44 | David Lichteblau <david at lichteblau dot com> | |
44d7460c | 45 | Xavier Mallard <zedek at gnu-rox dot org> |
856dd475 KL |
46 | Istvan Marko <mi-mtty at kismala dot com> |
47 | Ted Morse <morse at ciholas dot com> | |
48 | Dan Nicolaescu <dann at ics dot uci dot edu> | |
49 | Gergely Nagy <algernon at debian dot org> | |
50 | Mark Plaksin <happy at mcplaksin dot org> | |
51 | Francisco Borges <borges at let dot rug dot nl> | |
52 | Frank Ruell <stoerte at dreamwarrior dot net> | |
53 | Dan Waber <dwaber at logolalia dot com> | |
54 | and many others. | |
55 | ||
56 | Richard Stallman was kind enough to review an earlier version of my | |
57 | patches. | |
58 | ||
59 | ||
422f68e0 KL |
60 | MAILING LISTS |
61 | ------------- | |
62 | ||
63 | The multi-tty mailing list (discussion & bug reports): | |
64 | ||
65 | Address: multi-tty@lists.fnord.hu | |
66 | Signup: http://lists.fnord.hu/mailman/listinfo/multi-tty | |
67 | Archive: http://news.gmane.org/gmane.emacs.multi-tty/ | |
68 | ||
69 | Commit notifications (read-only): | |
70 | ||
71 | Address: multi-tty-commits@lists.fnord.hu | |
72 | Signup: http://lists.fnord.hu/mailman/listinfo/multi-tty-commits | |
73 | ||
74 | ||
75 | STATUS | |
76 | ------ | |
77 | ||
78 | The branch is now very stable and almost full-featured. All of the | |
79 | major problems have been fixed, only a few minor issues remain. (It | |
80 | still needs to be ported to Windows/Mac/DOS, though.) Both multiple | |
81 | tty device support and simultaneous X and tty frame support works | |
82 | fine. Emacsclient has been extended to support opening new tty and X | |
83 | frames. It has been changed open new Emacs frames by default. | |
84 | ||
85 | The multi-tty branch has been scheduled for inclusion in the next | |
779d7de9 | 86 | major release of Emacs (version 23). I expect the merge into the |
422f68e0 KL |
87 | development trunk to occur sometime during next year (2005), after the |
88 | merge of the Unicode branch. | |
89 | ||
90e06c2e KL |
90 | Tested on GNU/Linux, Solaris 8, FreeBSD and OpenBSD. Please let me |
91 | know if you succeed or fail to use it on other platforms---I'll have a | |
92 | few tricky test cases for you. | |
422f68e0 KL |
93 | |
94 | Known problems: | |
95 | ||
779d7de9 KL |
96 | * GTK support. If you compile your Emacs with the GTK |
97 | toolkit, some functionality of multi-tty will be lost. | |
98 | Current releases of GTK have limitations and bugs that | |
99 | prevent full-blown multi-display support in Emacs. Use the | |
100 | Lucid toolkit if you want to see a complete feature set. | |
101 | ||
856dd475 KL |
102 | * The single-kboard mode. |
103 | ||
104 | If your multi-tty Emacs session seems to be frozen, you | |
105 | probably have a recursive editing session or a pending | |
106 | minibuffer prompt (which is a kind of recursive editing) on | |
107 | another display. To unfreeze your session, switch to that | |
108 | display and complete the recursive edit, for example by | |
109 | pressing C-] (`abort-recursive-edit'). | |
110 | ||
111 | I am sorry to say that currently there is no way to break | |
112 | out of this "single-kboard mode" from a frozen display. If | |
113 | you are unable to switch to the display that locks the | |
114 | others (for example because it is on a remote computer), | |
115 | then you can use emacsclient to break out of all recursive | |
116 | editing sessions: | |
117 | ||
118 | emacsclient -e '(top-level)' | |
119 | ||
120 | Note that this (perhaps) unintuitive behaviour is by design. | |
121 | Single-kboard mode is required because of an intrinsic Emacs | |
122 | limitation that is very hard to eliminate. (This limitation | |
123 | is related to the single-threaded nature of Emacs.) | |
124 | ||
125 | I plan to implement better user notification and support for | |
126 | breaking out of single-kboard mode from locked displays. | |
127 | ||
128 | * Mac, Windows and DOS support is broken, doesn't even | |
129 | compile. Multiple display support will probably not provide | |
130 | new Emacs features on these systems, but the multi-tty | |
131 | branch changed a few low-level interfaces, and the | |
132 | system-dependent source files need to be adapted | |
133 | accordingly. The changes are mostly trivial, so almost | |
134 | anyone can help, if only by compiling the branch and | |
135 | reporting the compiler errors. (It is not worth to do this | |
136 | yet, though.) | |
137 | ||
422f68e0 | 138 | |
422f68e0 KL |
139 | HOW TO GET THE BRANCH |
140 | --------------------- | |
141 | ||
142 | The branch uses GNU Arch (http://www.gnuarch.org) for version control. | |
28d440ab | 143 | |
6548cf00 | 144 | Retrieving the latest version of the branch: |
4f0359de | 145 | |
44d7460c | 146 | tla register-archive -f http://lorentey.hu/arch/2004/ |
be0f4123 KL |
147 | tla get lorentey@elte.hu--2004/emacs--multi-tty <directory> |
148 | ||
149 | This incantation uses my private archive mirror that is hosted on a | |
150 | relatively low-bandwidth site; if you are outside Hungary, you will | |
779d7de9 KL |
151 | probably want to you use my secondary mirror: (Note that the -f option |
152 | will overwrite the archive location if you have previously registered | |
153 | the Hungarian one.) | |
154 | ||
155 | tla register-archive -f http://aszt.inf.elte.hu/~lorentey/mirror/arch/2004 | |
156 | tla get lorentey@elte.hu--2004/emacs--multi-tty <directory> | |
157 | ||
158 | http://aszt.inf.elte.hu/~lorentey/mirror/arch/2004 | |
159 | ||
160 | The Arch supermirror provides mirroring services for all public Arch | |
161 | repositories. We have a mirror there, too, if you prefer. | |
be0f4123 | 162 | |
779d7de9 | 163 | tla register-archive -f http://mirrors.sourcecontrol.net/lorentey%40elte.hu--2004 |
daf01701 | 164 | tla get lorentey@elte.hu--2004/emacs--multi-tty <directory> |
4f0359de | 165 | |
44d7460c KL |
166 | My GPG key id is 0FB27A3F; it is available from |
167 | hkp://wwwkeys.eu.pgp.net/, or from my homepage at | |
422f68e0 | 168 | http://lorentey.hu/rolam/gpg.html) |
7b00d185 | 169 | |
856dd475 KL |
170 | Don't worry if the above checkout takes a few minutes to complete; |
171 | once you have a source tree, updating it to the latest revision will | |
172 | be _much_ faster. Use the following command for the update: | |
6ad9aaa9 | 173 | |
856dd475 | 174 | tla replay |
6ad9aaa9 | 175 | |
856dd475 KL |
176 | You can find more information about Arch on http://wiki.gnuarch.org/. |
177 | It's a wonderful source control system, I highly recommend it. | |
6ad9aaa9 | 178 | |
422f68e0 | 179 | If you don't have tla, the branch has a homepage from which you can |
7b00d185 | 180 | download conventional patches against Emacs CVS HEAD: |
4f0359de | 181 | |
be0f4123 | 182 | http://lorentey.hu/project/emacs.html |
28d440ab | 183 | |
779d7de9 KL |
184 | DEBIAN PACKAGES |
185 | --------------- | |
186 | ||
187 | If you run Debian, or a distribution based on Debian, you are welcome | |
188 | to use our binary packages; put these lines in your /etc/apt/sources.list: | |
189 | ||
190 | # Multi-tty Emacs | |
191 | deb http://aszt.inf.elte.hu/~lorentey/mirror/apt ./ | |
192 | deb-src http://aszt.inf.elte.hu/~lorentey/mirror/apt ./ | |
193 | ||
194 | Note that these packages are intended solely to provide an easy way to | |
195 | test the new multi-tty features. They are not to be taken as Emacs | |
196 | releases, and it's a mistake to expect robust operation or any kind of | |
197 | timely support for them. Do not install them, unless you'd like to | |
198 | have your editor crash on you. | |
199 | ||
28d440ab | 200 | |
90e06c2e KL |
201 | COMPILATION |
202 | ----------- | |
0c72d684 | 203 | |
d03a8fe4 | 204 | The multi-tty branch is compiled the same way as Emacs itself: |
bc279d67 | 205 | |
90e06c2e KL |
206 | make maintainer-clean # (If you have compiled Emacs before) |
207 | ||
d03a8fe4 | 208 | ./configure <your favourite options> |
bc279d67 | 209 | make bootstrap |
d03a8fe4 KL |
210 | make install |
211 | ||
90e06c2e KL |
212 | If you have strange compilation errors, they may be caused by old |
213 | *.elc files that are left over from an earlier bootstrap. The `make | |
214 | maintainer-clean' target deletes them, so it is a good idea to run | |
215 | that before reporting a bug. (Emacs requires a clean recompilation | |
216 | after certain kinds of source code changes.) | |
d03a8fe4 | 217 | |
90e06c2e KL |
218 | TESTING |
219 | ------- | |
220 | ||
221 | To test the multi-tty branch, start up the Emacs server with the | |
d03a8fe4 KL |
222 | following commands: |
223 | ||
224 | emacs | |
7b00d185 | 225 | M-x server-start |
bc279d67 | 226 | |
7b00d185 KL |
227 | and then (from a shell prompt on another terminal) start emacsclient |
228 | with | |
d03a8fe4 KL |
229 | emacsclient -t /optional/file/names... (for a tty frame) |
230 | emacsclient /optional/file/names... (for an X frame) | |
28d440ab | 231 | |
d03a8fe4 | 232 | (Make sure both emacs and emacsclient are multi-tty versions.) |
04c3243c | 233 | You'll hopefully have two fully working, independent frames on |
7b00d185 | 234 | separate terminals. The new frame is closed automatically when you |
2a0c7b06 KL |
235 | finish editing the specified files (C-x #), but delete-frame (C-x 5 0) |
236 | also works. Of course, you can create frames on more than two tty | |
237 | devices. | |
52c2ee2a | 238 | |
7b00d185 KL |
239 | Creating new frames on the same tty with C-x 5 2 works, and they |
240 | behave the same way as in previous Emacs versions. If you exit emacs, | |
241 | all terminals should be restored to their previous states. | |
daf01701 | 242 | |
856dd475 KL |
243 | This is work in progress, and probably full of bugs. It is a good |
244 | idea to run emacs from gdb, so that you'll have a live instance to | |
245 | debug if something goes wrong. Please send me your bug reports on our | |
246 | mailing list: multi-tty@lists.fnord.hu | |
04c3243c | 247 | |
422f68e0 KL |
248 | TIPS & TRICKS |
249 | ------------- | |
250 | ||
bacb6689 KL |
251 | I think the best way to use the new Emacs is to have it running inside |
252 | a disconnected GNU screen session, and always use emacsclient for | |
422f68e0 KL |
253 | normal work. One advantage of this is that not a single keystroke of |
254 | your work will be lost if the display device that you are using | |
255 | crashes, or the network connection times out, or whatever. (I had an | |
256 | extremely unstable X server for some time while I was developing these | |
257 | patches, and running Emacs this way has saved me a number of M-x | |
258 | recover-session invocations.) | |
259 | ||
97c57fb2 KL |
260 | I use the following two bash scripts to handle my Emacs sessions: |
261 | ||
262 | -------------------------------------------------------connect-emacs-- | |
263 | #!/bin/bash | |
264 | # Usage: connect-emacs <name> <args>... | |
265 | # | |
266 | # Connects to the Emacs instance called NAME. Starts up the instance | |
267 | # if it is not already running. The rest of the arguments are passed | |
268 | # to emacsclient. | |
269 | ||
270 | name="$1" | |
271 | shift | |
272 | ||
273 | if [ -z "$name" ]; then | |
274 | echo "Usage: connect_emacs <name> <args>..." >&2 | |
275 | exit 1 | |
276 | fi | |
277 | preload-emacs "$name" wait | |
278 | /usr/bin/emacsclient.emacs-multi-tty -s "$name" "$@" | |
279 | ---------------------------------------------------------------------- | |
280 | ||
281 | -------------------------------------------------------preload-emacs-- | |
282 | #!/bin/bash | |
283 | # Usage: preload-emacs <name> [<waitp>] | |
284 | # | |
285 | # Preloads the Emacs instance called NAME in a detached screen | |
286 | # session. Does nothing if the instance is already running. If WAITP | |
287 | # is non-empty, the function waits until the server starts up and | |
288 | # creates its socket; otherwise it returns immediately. | |
289 | ||
290 | name="$1" | |
291 | waitp="$2" | |
292 | screendir="/var/run/screen/S-$USER" | |
293 | serverdir="/tmp/emacs$UID" | |
294 | emacs=/usr/bin/emacs-multi-tty # Or wherever you installed your multi-tty Emacs | |
295 | ||
296 | if [ -z "$name" ]; then | |
297 | echo "Usage: preload_emacs <name> [<waitp>]" >&2 | |
298 | exit 1 | |
299 | fi | |
300 | ||
301 | if [ ! -e "$screendir"/*."$name" ]; then | |
302 | if [ -e "$serverdir/$name" ]; then | |
303 | # Delete leftover socket (for the wait option) | |
304 | rm "$serverdir/$name" | |
305 | fi | |
306 | screen -dmS "$name" "$emacs" -nw --eval "(setq server-name \"$name\")" -f server-start | |
307 | fi | |
308 | if [ ! -z "$waitp" ]; then | |
309 | while [ ! -e "$serverdir/$name" ]; do sleep 0.1; done | |
310 | fi | |
311 | ---------------------------------------------------------------------- | |
312 | ||
313 | I have the following in my profile to have two instances automatically | |
314 | preloaded for editing and email: | |
315 | ||
316 | preload-emacs editor | |
317 | preload-emacs gnus | |
318 | ||
319 | It is useful to set up short aliases for connect-emacs. I use the | |
320 | following: | |
321 | ||
322 | alias edit="connect-emacs editor" | |
323 | alias e=edit | |
324 | alias et="connect-emacs editor -t" | |
325 | alias gnus="connect-emacs gnus" | |
422f68e0 | 326 | |
28d440ab | 327 | |
2a42d440 KL |
328 | CHANGELOG |
329 | --------- | |
330 | ||
331 | See arch logs. | |
332 | ||
333 | ||
28d440ab KL |
334 | NEWS |
335 | ---- | |
336 | ||
2a42d440 | 337 | For the NEWS file: (Needs much, much work) |
28d440ab | 338 | |
2246281f | 339 | ** Support for multiple terminal devices has been added. |
6548cf00 | 340 | |
2246281f KL |
341 | *** You can specify a terminal device (`tty' parameter) and a terminal |
342 | type (`tty-type' parameter) to `make-terminal-frame'. | |
6548cf00 | 343 | |
2246281f KL |
344 | *** You can test for the presence of multiple terminal support by |
345 | testing for the `multi-tty' feature. | |
28d440ab | 346 | |
2246281f | 347 | *** Emacsclient has been extended to support opening a new terminal |
aaaf7fe1 KL |
348 | frame. Its behaviour has been changed to open a new Emacs frame by |
349 | default. Use the -c option to get the old behavior of opening | |
350 | files in the currently selected Emacs frame. | |
e5299d8d | 351 | |
2246281f KL |
352 | *** A make-frame-on-tty function has been added to make it easier to |
353 | create frames on new terminals. | |
354 | ||
2a42d440 KL |
355 | *** New functions: frame-tty-name, frame-tty-type, delete-tty, |
356 | terminal-local-value, set-terminal-local-value | |
2246281f | 357 | |
4400e764 KL |
358 | terminal-id, terminal-parameters, terminal-parameter, |
359 | set-terminal-parameter | |
360 | ||
2a42d440 | 361 | *** New variables: global-key-translation-map |
2246281f | 362 | |
2a42d440 KL |
363 | *** The keymaps key-translation-map and function-key-map are now |
364 | terminal-local. | |
2246281f KL |
365 | |
366 | ** Support for simultaneous graphical and terminal frames has been | |
367 | added. | |
368 | ||
369 | *** The function `make-frame-on-display' now works during a terminal | |
370 | session, and `make-frame-on-tty' works during a graphical session. | |
371 | ||
372 | *** The `window-system' variable has been made frame-local. | |
373 | ||
374 | *** The new `initial-window-system' variable contains the | |
375 | `window-system' value for the first frame. | |
819b8f00 | 376 | |
2a42d440 | 377 | *** talk.el has been extended for multiple tty support. |
28d440ab | 378 | |
28d440ab | 379 | |
90e06c2e KL |
380 | * * * |
381 | ||
382 | (The rest of this file consists of my development notes and as such it | |
383 | is probably not very interesting for anyone else.) | |
384 | ||
7b00d185 KL |
385 | THINGS TO DO |
386 | ------------ | |
4edd8a5c | 387 | |
4400e764 KL |
388 | ** The handling of lisp/term/*.el, and frame creation in general, is a |
389 | big, big mess. How come the terminal-specific file is loaded by | |
390 | tty-create-frame-with-faces? I don't think it is necessary to load | |
391 | these files for each frame; once per terminal should be enough. | |
392 | ||
393 | ** Fix frame-set-background-mode in this branch. It was recently | |
394 | changed in CVS, and frame.el in multi-tty has not yet been adapted | |
395 | for the changes. (It needs to look at | |
396 | default-frame-background-mode.) | |
397 | ||
398 | ** I think `(set-)terminal-local-value' and the terminal parameter | |
399 | mechanism should be integrated into a single framework. | |
400 | ||
401 | ** Add the following hooks: after-delete-frame-hook (for server.el, | |
402 | instead of delete-frame-functions), | |
403 | after-delete-terminal-functions, after-create-terminal-functions. | |
404 | ||
1fb8c4ad KL |
405 | ** Having {reset,init}_all_sys_modes in set-input-mode breaks arrow |
406 | keys on non-selected terminals under screen, and sometimes on other | |
407 | terminal types as well. The other function keys continue to work | |
408 | fine. Sometimes faces on these screens become garbled. | |
409 | ||
410 | This only seems to affect displays that are of the same terminfo | |
411 | type as the selected one. Interestingly, in screen Emacs normally | |
412 | reports the up arrow key as `M-o A', but after the above SNAFU, it | |
413 | complains about `M-[ a'. UNIX ttys are a complete mystery to me, | |
414 | but it seems the reset-reinitialize cycle somehow leaves the | |
415 | non-selected terminals in a different state than usual. I have no | |
416 | idea how this could happen. | |
417 | ||
418 | Currently set-input-mode resets only the currently selected | |
419 | terminal, which seems to somehow work around the problem. | |
420 | ||
421 | ** Fix set-input-mode for multi-tty. It's a truly horrible interface; | |
422 | what if we'd blow it up into several separate functions (with a | |
423 | compatibility definition)? | |
424 | ||
425 | ** BULK RENAME: The `display-' prefix of new Lisp-level functions | |
426 | conflicts with stuff like `display-time-mode'. Use `device-' | |
7d6d7d1a KL |
427 | or `terminal-' instead. I think I prefer `terminal-'. |
428 | ||
3e6f836c KL |
429 | It turns out that most of the offending Lisp functions were defined |
430 | in the trunk. Therefore, compatibility aliases should be defined | |
431 | for the following names: | |
432 | ||
433 | display-color-cells terminal-color-cells | |
434 | display-color-p terminal-color-p | |
435 | display-graphic-p terminal-graphic-p | |
436 | display-grayscale-p terminal-grayscale-p | |
437 | display-images-p terminal-images-p | |
438 | display-mm-height terminal-mm-height | |
439 | display-mm-width terminal-mm-width | |
440 | display-mouse-p terminal-mouse-p | |
441 | display-multi-font-p terminal-multi-font-p | |
442 | display-multi-frame-p terminal-multi-frame-p | |
443 | display-pixel-height terminal-pixel-height | |
444 | display-pixel-width terminal-pixel-width | |
445 | display-pixels-per-inch terminal-pixels-per-inch | |
446 | display-planes terminal-planes | |
447 | display-popup-menus-p terminal-popup-menus-p | |
448 | display-save-under terminal-save-under | |
449 | display-screens terminal-screens | |
450 | display-supports-face-attributes-p terminal-supports-face-attributes-p | |
451 | display-visual-class terminal-visual-class | |
452 | framep-on-display framep-on-terminal | |
453 | frames-on-display-list frames-on-terminal-list | |
454 | ||
455 | The following functions were introduced in the multi-tty branch, and | |
456 | can be renamed without aliases: | |
457 | ||
458 | display-controlling-tty-p terminal-controlling-tty-p | |
459 | display-list terminal-list | |
460 | display-live-p terminal-live-p | |
461 | display-name terminal-name | |
462 | display-tty-type terminal-tty-type | |
463 | frame-display terminal-of-frame | |
464 | ||
7d6d7d1a KL |
465 | ** The semantics of terminal-local variables are confusing; it is not |
466 | clear what binding is in effect in any given time. See if | |
467 | current_kboard (or at least the terminal-local bindings exported to | |
468 | Lisp) might be changed to be tied to the selected frame instead. | |
469 | Currently, `function-key-map' and `key-translation-map' may be | |
470 | accessed reliably only using the hackish | |
471 | `(set-)terminal-local-value' functions. | |
472 | ||
473 | Perhaps there should be a difference between `last-command' &co. | |
474 | and these more conventional configuration variables. | |
475 | (E.g. `symbol-value' would use current_kboard to access | |
476 | `last-command', but SELECTED_FRAME()->display->kboard to get the | |
477 | value of `function-key-map'. | |
1fb8c4ad | 478 | |
856dd475 KL |
479 | ** The single-keyboard mode of MULTI_KBOARD is extremely confusing |
480 | sometimes; Emacs does not respond to stimuli from other keyboards. | |
481 | At least a beep or a message would be important, if the single-mode | |
482 | is still required to prevent interference. (Reported by Dan | |
483 | Nicolaescu.) | |
484 | ||
485 | Update: selecting a region with the mouse enables single_kboard | |
486 | under X. This is very confusing. | |
487 | ||
68bba4e4 KL |
488 | Update: After discussions with Richard Stallman, this will be |
489 | resolved by having locked displays warn the user to wait, and | |
490 | introducing a complex protocol to remotely bail out of | |
491 | single-kboard mode by pressing C-g. | |
856dd475 KL |
492 | |
493 | Update: Warning the user is not trivial to implement, as Emacs has | |
68bba4e4 KL |
494 | only one echo area, shared by all frames. Ideally the warning |
495 | should not be displayed on the display that is locking the others. | |
496 | Perhaps the high probability of user confusion caused by | |
497 | single_kboard mode deserves a special case in the display code. | |
498 | Alternatively, it might be good enough to signal single_kboard mode | |
499 | by changing the modelines or some other frame-local display element | |
500 | on the locked out displays. | |
856dd475 KL |
501 | |
502 | ** normal-erase-is-backspace-mode in simple.el needs to be updated for | |
503 | multi-tty (rep. by Dan Waber). | |
ec160444 | 504 | |
b6660415 KL |
505 | ** Hunt down display-related functions in frame.el and extend them all |
506 | to accept display ids. | |
507 | ||
856dd475 KL |
508 | ** rif->flush_display_optional (NULL) calls should be replaced by a |
509 | new global function. | |
510 | ||
97c57fb2 KL |
511 | ** The set-locale-environment hack (adding the DISPLAY option) should |
512 | be replaced with a clean design. | |
68bba4e4 | 513 | |
97c57fb2 KL |
514 | ** standard-display-table should be display-local. |
515 | standard-display-european should be display-local. | |
68bba4e4 | 516 | |
7d6d7d1a KL |
517 | ** With iswitchb-default-method set to 'always-frame, only frames on |
518 | the current display should be considered. This might involve | |
519 | extending `get-buffer-window'. | |
520 | ||
97c57fb2 KL |
521 | ** Have a look at Vlocale_coding_system. Seems like it would be a |
522 | tedious job to localize it, although most references use it for | |
523 | interfacing with libc and are therefore OK with the global | |
524 | definition. | |
525 | ||
526 | Exceptions found so far: x-select-text and | |
527 | x-cut-buffer-or-selection-value. | |
68bba4e4 | 528 | |
6ea444cf KL |
529 | ** Have a look at fatal_error_hook. |
530 | ||
97b977db KL |
531 | ** Have a look at set_frame_matrix_frame. |
532 | ||
7d1a6b33 KL |
533 | ** Check if we got term-setup-hook right. |
534 | ||
9d3d44ba KL |
535 | ** I think tip_frame should be display-local. |
536 | ||
537 | ** Check display reference count handling in x_create_tip_frame. | |
538 | ||
54021676 KL |
539 | ** make-frame does not correctly handle extra parameters in its |
540 | argument: | |
541 | ||
542 | (frame-parameter (make-frame (list (cons 'foobar 42))) 'foobar) | |
543 | => nil | |
544 | ||
545 | (This is likely an error in the CVS trunk.) | |
546 | ||
01d81f75 KL |
547 | ** Dan Nicolaescu suggests that -nw should be added as an alias for -t |
548 | in emacsclient. Good idea. (Alas, implementing this is not | |
549 | trivial, getopt_long does not seem to support two-letter ``short'' | |
d3c554a0 | 550 | options. Patches are welcome.) :-) |
01d81f75 KL |
551 | |
552 | ** Mark Plaksin suggests that emacsclient should accept the same | |
553 | X-related command-line arguments as Emacs. Most of the X-related | |
554 | argument-handling is done in Lisp, so this should be quite easy to | |
555 | implement. | |
d448e982 | 556 | |
cd5355f9 KL |
557 | ** Gergely Nagy suggests that C-x # should only kill the current |
558 | frame, not any other emacsclient frame that may have the same file | |
559 | opened for editing. I think I agree with him. | |
560 | ||
0b0d3e0b KL |
561 | ** Very strange bug: visible-bell does not work on secondary |
562 | terminals in xterm and konsole. The screen does flicker a bit, | |
563 | but it's so quick it isn't noticable. | |
564 | ||
428a555e | 565 | ** Move baud_rate to struct display. |
7b00d185 | 566 | |
7b00d185 KL |
567 | ** Implement support for starting an interactive Emacs session without |
568 | an initial frame. (The user would connect to it and open frames | |
f70dd009 | 569 | later, with emacsclient.) |
7b00d185 | 570 | |
2cd1371d KL |
571 | ** Fix Mac support (I can't do this entirely myself). Note that the |
572 | current state of Mac-specific source files in the multi-tty tree | |
573 | are not useful; before starting work on Mac support, revert to | |
574 | pristine, pre-multi-tty versions. | |
7b00d185 | 575 | |
2cd1371d KL |
576 | ** Fix W32 support (I can't do this entirely myself). Note that the |
577 | current state of W32-specific source files in the multi-tty tree | |
578 | are not useful; before starting work on W32 support, revert to | |
579 | pristine, pre-multi-tty versions. | |
7b00d185 | 580 | |
2cd1371d KL |
581 | ** Fix DOS support (I can't do this entirely myself). Note that the |
582 | current state of DOS-specific source files in the multi-tty tree | |
583 | are not useful; before starting work on DOS support, revert to | |
584 | pristine, pre-multi-tty versions. | |
7b00d185 KL |
585 | |
586 | ** Do a grep on XXX and ?? for more issues. | |
587 | ||
d3c554a0 KL |
588 | ** Understand Emacs's low-level input system (it's black magic) :-) |
589 | What exactly does interrupt_input do? I tried to disable it for | |
590 | raw secondary tty support, but it does not seem to do anything | |
591 | useful. (Update: Look again. X unconditionally enables this, maybe | |
592 | that's why raw terminal support is broken again. I really do need | |
593 | to understand input.) | |
7b00d185 | 594 | |
7d6d7d1a KL |
595 | ** Fix stuff_char for multi-tty. Doesn't seem to be of high priority. |
596 | ||
6548cf00 KL |
597 | DIARY OF CHANGES |
598 | ---------------- | |
599 | ||
600 | (ex-TODO items with explanations.) | |
28d440ab | 601 | |
114a8b8c | 602 | -- Introduce a new struct for terminal devices. |
28d440ab | 603 | |
daf01701 | 604 | (Done, see struct tty_output. The list of members is not yet |
28d440ab KL |
605 | complete.) |
606 | ||
28d440ab KL |
607 | -- Change the bootstrap procedure to initialize tty_list. |
608 | ||
609 | (Done, but needs review.) | |
610 | ||
28d440ab KL |
611 | -- Change make-terminal-frame to support specifying another tty. |
612 | ||
613 | (Done, new frame parameters: `tty' and `tty-type'.) | |
614 | ||
9628b887 KL |
615 | -- Implement support for reading from multiple terminals. |
616 | ||
617 | (Done, read_avail_input tries to read from each terminal, until one | |
28d7d09f | 618 | succeeds. MULTI_KBOARD is not used. Secondary terminals don't send |
6548cf00 | 619 | SIGIO!) |
9628b887 | 620 | |
819b8f00 KL |
621 | (Update: They do, now.) |
622 | ||
daf01701 KL |
623 | (Update2: After enabling X, they don't.) |
624 | ||
9628b887 | 625 | -- other-frame should cycle through the frames on the `current' |
114a8b8c | 626 | terminal only. |
9628b887 | 627 | |
6548cf00 | 628 | (Done, by trivially modifiying next_frame and prev_frame.) |
9628b887 KL |
629 | |
630 | -- Support different terminal sizes. | |
114a8b8c | 631 | |
9628b887 KL |
632 | (Done, no problem.) |
633 | ||
634 | -- Make sure terminal resizes are handled gracefully. (Could be | |
635 | problematic.) | |
636 | ||
6548cf00 KL |
637 | (Done. We don't get automatic SIGWINCH for additional ttys, |
638 | though.) | |
9628b887 KL |
639 | |
640 | -- Extend emacsclient to automatically open a new tty when it connects | |
641 | to Emacs. | |
114a8b8c | 642 | |
9628b887 KL |
643 | (Done. It's an ugly hack, needs more work.) |
644 | ||
52c2ee2a KL |
645 | -- Redisplay must refresh the topmost frame on *all* terminals, not |
646 | just the initial terminal. | |
114a8b8c | 647 | |
52c2ee2a | 648 | (Done, but introduced an ugly redisplay problems. Ugh.) |
9628b887 | 649 | |
6548cf00 KL |
650 | -- Fix redisplay problems. |
651 | ||
52c2ee2a KL |
652 | (Done; it turned out that the entire Wcm structure must be moved |
653 | inside tty_output. Why didn't I catch this earlier?) | |
6548cf00 KL |
654 | |
655 | -- Provide a way for emacsclient to tell Emacs that the tty has been | |
656 | resized. | |
657 | ||
658 | (Done, simply forward the SIGWINCH signal.) | |
659 | ||
660 | -- Each keypress should automatically select the frame corresponding | |
661 | to the terminal that it was coming from. This means that Emacs | |
662 | must know from which terminal the last keyboard event came from. | |
6548cf00 | 663 | |
52c2ee2a KL |
664 | (Done, it was quite simple, the input event system already |
665 | supported multiple frames.) | |
6548cf00 KL |
666 | |
667 | -- Fix SIGIO issue with secondary terminals. | |
668 | ||
669 | (Done, emacsclient signals Emacs after writing to the proxy pseudo | |
52c2ee2a KL |
670 | terminal. Note that this means that multi-tty does not work with |
671 | raw ttys!) | |
28d440ab | 672 | |
0a125897 KL |
673 | (Update: This is bullshit. There is a read_input_waiting function, |
674 | extend that somehow.) | |
675 | ||
819b8f00 KL |
676 | (Update of update: The first update was not right either, extending |
677 | read_input_waiting was not necessary. Secondary ttys do seem to | |
678 | send signals on input.) | |
679 | ||
daf01701 KL |
680 | (Update^3: Not any more.) |
681 | ||
fca177d4 KL |
682 | -- Make make-terminal-frame look up the `tty' and `tty-type' frame |
683 | parameters from the currently selected terminal before the global | |
684 | default. | |
685 | ||
686 | (Done.) | |
687 | ||
688 | -- Put all cached terminal escape sequences into struct tty_output. | |
689 | Currently, they are still stored in global variables, so we don't | |
690 | really support multiple terminal types. | |
691 | ||
52c2ee2a | 692 | (Done. It was not fun.) |
fca177d4 KL |
693 | |
694 | -- Implement sane error handling after initialization. (Currently | |
6548cf00 KL |
695 | emacs exits if you specify a bad terminal type.) The helpful error |
696 | messages must still be provided when Emacs starts. | |
697 | ||
fca177d4 KL |
698 | (Done.) |
699 | ||
700 | -- Implement terminal deletion, i.e., deleting local frames, closing | |
701 | the tty device and restoring its previous state without exiting | |
702 | Emacs. | |
9628b887 | 703 | |
fca177d4 KL |
704 | (Done, but at the moment only called when an error happens during |
705 | initialization. There is a memory corruption error around this | |
daf01701 | 706 | somewhere.) (Update: now it is fully enabled.) |
fca177d4 | 707 | |
8303ba32 KL |
708 | -- Implement automatic deletion of terminals when the last frame on |
709 | that terminal is closed. | |
710 | ||
711 | (Done.) | |
712 | ||
0a125897 KL |
713 | -- Restore tty screen after closing the terminal. |
714 | ||
715 | (Done, we do the same as Emacs 21.2 for all terminals.) | |
716 | ||
717 | -- 'TERM=dumb src/emacs' does not restore the terminal state. | |
114a8b8c | 718 | |
0a125897 | 719 | (Done.) |
fca177d4 | 720 | |
b2af72d2 KL |
721 | -- C-g should work on secondary terminals. |
722 | ||
723 | (Done, but the binding is not configurable.) | |
724 | ||
725 | -- Deal with SIGHUP in Emacs and in emacsclient. (After this, the | |
726 | server-frames may be removed from server.el.) | |
727 | ||
728 | (Done, nothing to do. It seems that Emacs does not receive SIGHUP | |
daf01701 | 729 | from secondary ttys, which is actually a good thing.) (Update: I |
7b00d185 | 730 | think it would be a bad idea to remove server-frames.) |
b2af72d2 | 731 | |
daf01701 | 732 | -- Change emacsclient/server.el to support the -t argument better, |
b2af72d2 KL |
733 | i.e. automatically close the socket when the frame is closed. |
734 | ||
735 | (Seems to be working OK.) | |
736 | ||
16c290d8 | 737 | -- Fix mysterious memory corruption error with tty deletion. To |
fca177d4 KL |
738 | trigger it, try the following shell command: |
739 | ||
740 | while true; do TERM=no-such-terminal-definition emacsclient -h; done | |
741 | ||
742 | Emacs usually dumps core after a few dozen iterations. (The bug | |
3224dac1 | 743 | seems to be related to the xfreeing or bzeroing of |
9d9f1812 KL |
744 | tty_output.Wcm. Maybe there are outside references to struct Wcm? |
745 | Why were these vars collected into a struct before multi-tty | |
746 | support?) | |
fca177d4 | 747 | |
16c290d8 KL |
748 | (Done. Whew. It turned out that the problem had nothing to do |
749 | with hypothetical external references to Wcm, or any other | |
750 | tty_output component; it was simply that delete_tty closed the | |
751 | filehandles of secondary ttys twice, resulting in fclose doubly | |
3224dac1 | 752 | freeing memory. Utterly trivial matter. I love the C's memory |
16c290d8 KL |
753 | management, it puts hair on your chest.) |
754 | ||
819b8f00 | 755 | -- Support raw secondary terminals. (Note that SIGIO works only on |
3224dac1 | 756 | the controlling terminal.) Hint: extend read_input_waiting for |
819b8f00 | 757 | multiple ttys and hopefully this will be fixed. |
fca177d4 | 758 | |
819b8f00 KL |
759 | (Done, it seems to have been working already for some time. It |
760 | seems F_SETOWN does work, after all. Not sure what made it fail | |
761 | earlier, but it seems to be fixed (there were several changes | |
762 | around request_sigio, maybe one of them did it). | |
3224dac1 | 763 | read_input_waiting is only used in sys_select, don't change |
daf01701 | 764 | it.) (Update: After adding X support, it's broken again.) |
d3c554a0 | 765 | (Update^2: No it isn't.) :-) |
c1c63edb | 766 | |
819b8f00 | 767 | -- Find out why does Emacs abort when it wants to close its |
0a125897 | 768 | controlling tty. Hint: chan_process[] array. Hey, maybe |
16c290d8 KL |
769 | noninterrupt-IO would work, too? Update: no, there is no process |
770 | for stdin/out. | |
c33d2d42 | 771 | |
819b8f00 KL |
772 | (Done. Added add/delete_keyboard_wait_descriptor to |
773 | term_init/delete_tty. The hint was right, in a way.) | |
6548cf00 | 774 | |
819b8f00 | 775 | -- Issue with SIGIO: it needs to be disabled during redisplay. See if |
3224dac1 | 776 | fcntl kernel behaviour could be emulated by emacsclient. |
0a125897 | 777 | |
819b8f00 | 778 | (Done. Simply disabled the SIGIO emulation hack in emacsclient.) |
d3c554a0 | 779 | (Update: it was added back.) (Update^2: and removed again.) |
22de1e79 | 780 | |
819b8f00 | 781 | -- server.el: There are issues with saving files in buffers of closed |
16c290d8 KL |
782 | clients. Try editing a file with emacsclient -f, and (without |
783 | saving it) do a delete-frame. The frame is closed without | |
784 | question, and a surprising confirmation prompt appears in another | |
785 | frame. | |
786 | ||
819b8f00 KL |
787 | (Done. delete-frame now asks for confirmation if it still has |
788 | pending buffers, and modified buffers don't seem to be deleted.) | |
789 | ||
790 | -- emacsclient.el, server.el: Handle eval or file open errors when | |
daf01701 | 791 | doing -t. |
16c290d8 | 792 | |
819b8f00 | 793 | (Done.) |
22de1e79 | 794 | |
819b8f00 KL |
795 | -- Make parts of struct tty_output accessible from Lisp. The device |
796 | name and the type is sufficient. | |
22de1e79 | 797 | |
819b8f00 KL |
798 | (Done, see frame-tty-name and frame-tty-type.) |
799 | ||
800 | -- Export delete_tty to the Lisp environment, for emacsclient. | |
22de1e79 | 801 | |
819b8f00 KL |
802 | (Done, see delete-tty.) |
803 | ||
daf01701 KL |
804 | -- Get rid of the accessor macros in termchar.h, or define macros for |
805 | all members. | |
806 | ||
807 | (Done.) | |
808 | ||
809 | -- Move device-specific parameters (like costs) commonly used by | |
810 | device backends to a common, device-dependent structure. | |
811 | ||
812 | (Done. See struct display_method in termhooks.h.) | |
813 | ||
814 | -- Fix X support. | |
815 | ||
816 | (Done. Well, it seems to be working.) | |
817 | ||
818 | -- Allow simultaneous X and tty frames. (Handling input could be | |
819 | tricky. Or maybe not.) | |
820 | ||
821 | (Done. Allowed, that is. It is currently extremely unstable, to | |
822 | the point of being unusable. The rif variable causes constant | |
823 | core dumps. Handling input is indeed tricky.) | |
819b8f00 | 824 | |
7b00d185 | 825 | -- Rewrite multi-tty input in terms of MULTI_KBOARD. |
28d440ab | 826 | |
7b00d185 KL |
827 | (Done. In fact, there was no need to rewrite anything, I just |
828 | added a kboard member to tty_display_info, and initialized the | |
829 | frame's kboard from there.) | |
819b8f00 | 830 | |
fa971ac3 KL |
831 | -- Fix rif issue with X-tty combo sessions. IMHO the best thing to do |
832 | is to get rid of that global variable (and use the value value in | |
833 | display_method, which is guaranteed to be correct). | |
834 | ||
835 | (Done, did exactly that. Core dumps during combo sessions became | |
836 | much rarer. In fact, I have not yet met a single one.) | |
837 | ||
17086732 KL |
838 | -- Add multi-tty support to talk.el. |
839 | ||
840 | (Done.) | |
841 | ||
428a555e KL |
842 | -- Clean up the source of emacsclient. It is a mess. |
843 | ||
844 | (Done, eliminated stupid proxy-pty kludge.) | |
845 | ||
846 | -- Fix faces on tty frames during X-tty combo sessions. There is an | |
847 | init_frame_faces call in init_sys_modes, see if there is a problem | |
848 | with it. | |
849 | ||
850 | (Done, there was a stupid mistake in | |
851 | Ftty_supports_face_attributes_p. Colors are broken, though.) | |
852 | ||
853 | -- C-x 5 2, C-x 5 o, C-x 5 0 on an emacsclient frame unexpectedly | |
854 | exits emacsclient. This is a result of trying to be clever with | |
855 | delete-frame-functions. | |
856 | ||
857 | (Fixed, added delete-tty-after-functions, and changed server.el to | |
858 | use it.) | |
859 | ||
860 | -- Something with (maybe) multi-keyboard support broke function keys | |
861 | and arrows on ttys during X+tty combo sessions. Debug this. | |
862 | ||
863 | (I can't reproduce it, maybe the terminal type was wrong.) | |
864 | ||
865 | -- Fix input from raw ttys (again). | |
866 | ||
867 | (Now it seems to work all right.) | |
868 | ||
869 | -- During an X-tty combo session, a (message "Hello") from a tty frame | |
870 | goes to the X frame. Fix this. | |
871 | ||
872 | (Done. There was a safeguard against writing to the initial | |
873 | terminal frame during bootstrap which prevented echo_area_display | |
874 | from working correctly on a tty frame during a combo session.) | |
875 | ||
114a8b8c | 876 | -- If there are no frames on its controlling terminal, Emacs should |
d3c554a0 | 877 | exit if the user presses C-c there. |
114a8b8c KL |
878 | |
879 | (Done, as far as possible. See the SIGTERM comment in | |
880 | interrupt_signal on why this seems to be impossible to solve this | |
881 | in general.) | |
882 | ||
883 | -- During an X session, Emacs seems to read from stdin. Also, Emacs | |
884 | fails to start without a controlling tty. | |
885 | ||
886 | (Fixed by replacing the troublesome termcap display with a dummy | |
887 | bootstrap display during bootstrap. | |
888 | ||
889 | -- Do tty output through struct display, like graphical display | |
890 | backends. | |
891 | ||
892 | (Done.) | |
893 | ||
894 | -- Define an output_initial value for output_method for the initial | |
895 | frame that is dumped with Emacs. Checking for this frame (e.g. in | |
896 | cmd_error_internal) is ugly. | |
897 | ||
898 | (Done, broking interactive temacs.) | |
899 | ||
900 | -- The command `emacsclient -t -e '(delete-frame)'' fails to exit. | |
901 | ||
902 | (Fixed.) | |
903 | ||
4ca927b4 KL |
904 | -- frame-creation-function should always create a frame that is on the |
905 | same display as the selected frame. Maybe frame-creation-function | |
906 | should simply be removed and make-frame changed to do the right | |
907 | thing. | |
908 | ||
909 | (Done, with a nice hack. frame-creation-function is now frame-local.) | |
910 | ||
911 | -- Fix C-g on raw ttys. | |
912 | ||
913 | (Done. I disabled the interrupt/quit keys on all secondary | |
914 | terminals, so Emacs sees C-g as normal input. This looks like an | |
915 | overkill, because emacsclient has extra code to pass SIGINT to | |
916 | Emacs, so C-g should remain the interrupt/quit key on emacsclient | |
917 | frames. See the next entry why implementing this distinction would | |
918 | be a bad idea.) | |
919 | ||
920 | -- Make sure C-g goes to the right frame with ttys. This is hard, as | |
921 | SIGINT doesn't have a tty parameter. :-( | |
922 | ||
923 | (Done, the previous change fixes this as a pleasant side effect.) | |
924 | ||
c0707982 KL |
925 | -- I have seen a case when Emacs with multiple ttys fell into a loop |
926 | eating 100% of CPU time. Strace showed this loop: | |
927 | ||
928 | getpid() = 30284 | |
929 | kill(30284, SIGIO) = 0 | |
930 | --- SIGIO (I/O possible) @ 0 (0) --- | |
931 | ioctl(6, FIONREAD, [0]) = -1 EIO (Input/output error) | |
932 | ioctl(5, FIONREAD, [0]) = -1 EIO (Input/output error) | |
933 | ioctl(0, FIONREAD, [0]) = 0 | |
934 | sigreturn() = ? (mask now []) | |
935 | gettimeofday({1072842297, 747760}, NULL) = 0 | |
936 | gettimeofday({1072842297, 747806}, NULL) = 0 | |
937 | select(9, [0 3 5 6], NULL, NULL, {0, 0}) = 2 (in [5 6], left {0, 0}) | |
938 | select(9, [0 3 5 6], NULL, NULL, {0, 0}) = 2 (in [5 6], left {0, 0}) | |
939 | gettimeofday({1072842297, 748245}, NULL) = 0 | |
940 | ||
941 | I have seen something similar with a single X frame, but have not | |
942 | been able to reproduce it for debugging. | |
943 | ||
944 | Update: This may have been caused by checking for nread != 0 | |
945 | instead of nread > 0 after calling read_socket_hook in | |
946 | read_avail_input. | |
947 | ||
948 | (Fixed. This was caused by unconditionally including stdin in | |
949 | input_wait_mask in init_process. The select call in | |
950 | wait_reading_process_input always returned immediately, indicating | |
951 | that there is pending input from stdin, which nobody read. | |
952 | ||
953 | Note that the above strace output seems to be an unrelated but | |
954 | similar bug. I think that is now fixed.) | |
4ca927b4 | 955 | |
2246281f KL |
956 | -- Exiting Emacs while there are emacsclient frames doesn't restore the |
957 | ttys to their default states. | |
958 | ||
959 | (This seems to be fixed by some previous change.) | |
960 | ||
961 | -- Allow opening an X session after -nw. | |
962 | ||
963 | (Done.) | |
964 | ||
d448e982 KL |
965 | -- Fix color handling during tty+X combo sessions. (It seems that tty |
966 | sessions automatically convert the face colors to terminal colors | |
967 | when the face is loaded. This conversion must happen instead on | |
968 | the fly in write_glyphs, which might be problematic, as color | |
969 | approximation is currently done in lisp (term/tty-colors.el).) | |
970 | (Update: hm, colors seem to work fine if I start emacs with -nw and | |
971 | then create an X frame. Maybe it's just a small buglet somewhere.) | |
972 | ||
973 | (Seems to be fixed. The problem was in startup.el, it did not | |
974 | initialize tty colors when the initial window system was | |
975 | graphical.) | |
2246281f | 976 | |
2441679b KL |
977 | -- emacs -nw --eval '(y-or-n-p "Foobar")' segfaults. (Reported by |
978 | Romain Francoise) | |
979 | ||
980 | (Fixed, there was a keyboard initialization problem.) | |
981 | ||
3bbdbec9 KL |
982 | -- Fix interactive use of temacs. There are face-related SEGVs, most |
983 | likely because of changes in realize_default_face, realize_face. | |
984 | ||
985 | (Fixed.) | |
986 | ||
bacb6689 KL |
987 | -- Don't exit Emacs when the last X connection fails during a |
988 | multi-display session. | |
989 | ||
990 | (Fixed.) | |
991 | ||
0c72d684 KL |
992 | -- Dan Nicolaescu noticed that starting emacsclient on the same |
993 | terminal device that is the controlling tty of the Emacs process | |
994 | gives unexpected results. | |
995 | ||
996 | (Fixed.) | |
997 | ||
4edd8a5c KL |
998 | -- Istvan Marko reported that Emacs hang on ttys if it was started |
999 | from a shell script. | |
1000 | ||
1001 | (Fixed. There was a bug in the multi-tty version of | |
1002 | narrow_foreground_group. tcsetpgrp blocks if it is called from a | |
1003 | process that is not in the same process group as the tty.) | |
1004 | ||
2fc0cf2a KL |
1005 | -- emacsclient -t from an Emacs term buffer does not work, complains |
1006 | about face problems. This can even lock up Emacs (if the recursive | |
1007 | frame sets single_kboard). Update: the face problems are caused by | |
1008 | bugs in term.el, not in multi-tty. The lockup is caused by | |
d3c554a0 | 1009 | single_kboard mode, and is not easily resolvable. The best thing to |
2fc0cf2a KL |
1010 | do is to simply refuse to create a tty frame of type `eterm'. |
1011 | ||
1012 | (Fixed, changed emacsclient to check for TERM=eterm. The face | |
1013 | complaints seem to be caused by bugs in term.el; they are not | |
1014 | related to multi-tty.) | |
1015 | ||
0b0d3e0b KL |
1016 | -- Find out the best way to support suspending Emacs with multiple |
1017 | ttys. My guess: disable it on the controlling tty, but from other | |
1018 | ttys pass it on to emacsclient somehow. (It is (I hope) trivial to | |
1019 | extend emacsclient to handle suspend/resume. A `kill -STOP' almost | |
1020 | works right now.) | |
1021 | ||
1022 | (Done. I needed to play with signal handling and the server | |
1023 | protocol a bit to make emacsclient behave as a normal UNIX program | |
1024 | wrt foreground/background process groups.) | |
1025 | ||
eb1f46c9 KL |
1026 | -- There is a flicker during the startup of `emacs -nw'; it's as if |
1027 | the terminal is initialized, reset and then initialialized again. | |
1028 | Debug this. (Hint: narrow_foreground_group is called twice during | |
1029 | startup.) | |
1030 | ||
1031 | (This is gone.) | |
1032 | ||
026ad6ba KL |
1033 | -- Robert Chassell has found serious copy-paste bugs with the |
1034 | multi-tty branch. There seem to be redisplay bugs while copying | |
1035 | from X to a terminal frame. Copying accented characters do not | |
1036 | work for me. | |
1037 | ||
1038 | (Patch-124 should fix this, by changing the interprogram-*-function | |
1039 | variables to be frame-local, as suggested by Mark Plaksin | |
1040 | (thanks!). I think that the redisplay bugs are in fact not bugs, | |
1041 | but delays caused by single_kboard --> perhaps MULTI_KBOARD should | |
1042 | be removed.) | |
1043 | ||
2cd1371d KL |
1044 | -- frame-creation-function was removed, which might be a bad idea. |
1045 | Think up a compatible solution. | |
1046 | ||
1047 | (It was an internal interface that may be changed when necessary.) | |
1048 | ||
1049 | -- Change Lisp code not to (getenv "TERM"); use the `tty-type' frame | |
1050 | parameter or the frame-tty-type function instead. (M-x tags-search | |
1051 | "TERM" helps with this.) Update: Actually, all getenv invocations | |
1052 | should be checked for multi-tty compatibility, and an interface | |
1053 | must be implemented to get the remote client's environment. | |
1054 | ||
1055 | (Done. Only getenv calls in lisp/term/*.el were changed; other | |
1056 | calls should be mostly left as they are.) | |
1057 | ||
1058 | -- Add an elaborate mechanism for display-local variables. (There are | |
1059 | already a few of these; search for `terminal-local' in the Elisp | |
1060 | manual.) | |
1061 | ||
1062 | (Not needed. Display-local variables could be emulated by | |
1063 | frame-local variables.) | |
026ad6ba | 1064 | |
d4d89d37 KL |
1065 | -- Emacs assumes that all terminal frames have the same locale |
1066 | settings as Emacs itself. This may lead to bogus results in a | |
1067 | multi-locale setup. (E.g., while logging in from a remote client | |
1068 | with a different locale.) | |
1069 | (Update after new bugreport by Friedrich Delgado Friedrichs: | |
1070 | (at least) the structs terminal_coding and keyboard_coding in | |
1071 | coding.c must be moved to struct display, and the Lisp interface | |
1072 | [set-]keyboard-coding-system must be adapted for the change.) | |
1073 | ||
1074 | (Fixed. Emacs now uses the locale settings as seen by the | |
1075 | emacsclient process for server tty frames.) | |
68bba4e4 | 1076 | (Update: Not really; Vlocale_coding_system is still global.) |
b6660415 KL |
1077 | |
1078 | -- Make `struct display' accessible to Lisp programs. Accessor functions: | |
1079 | ||
1080 | (displayp OBJECT): Returns t if OBJECT is a display. | |
1081 | => Implemented as display-live-p. | |
1082 | ||
1083 | (display-list): Returns list of currently active displays. | |
1084 | => Implemented. | |
1085 | ||
1086 | (selected-display): Returns the display object of the selected frame. | |
1087 | => Not strictly necessary, but implemented anyway. | |
1088 | ||
1089 | (frame-display FRAME): Returns the display object of FRAME. | |
1090 | => Implemented. | |
1091 | ||
1092 | (display-frames DISPLAY): Returns a list of frames on DISPLAY. | |
1093 | => Already implemented, see frames-on-display-list. | |
1094 | ||
1095 | (display-type DISPLAY): Returns the type of DISPLAY, as a | |
1096 | symbol. (See `framep'.) | |
1097 | => Implemented as display-live-p. | |
1098 | ||
1099 | (display-device DISPLAY): Returns the name of the device that | |
1100 | DISPLAY uses, as a string. (E.g: "/dev/pts/16", or | |
1101 | ":0.0") | |
1102 | => Implemented as display-name. | |
1103 | ||
1104 | etc. | |
1105 | ||
1106 | See next issue why this is necessary. | |
1107 | ||
1108 | (Update: The consensus on emacs-devel seems to be to do this via | |
1109 | integer identifiers. That's fine by me.) | |
1110 | ||
1111 | (Done.) | |
1112 | ||
1113 | -- The following needs to be supported: | |
1114 | ||
1115 | $ emacsclient -t | |
1116 | C-z | |
1117 | $ emacsclient -t | |
1118 | (This fails now.) | |
1119 | ||
1120 | The cleanest way to solve this is to allow multiple displays on the | |
1121 | same terminal device; each new emacsclient process should create | |
1122 | its own display. As displays are currently identified by their | |
1123 | device names, this is not possible until struct display becomes | |
1124 | accessible as a Lisp-level object. | |
1125 | ||
1126 | (Done.) | |
1127 | ||
856dd475 KL |
1128 | -- Miles Bader suggests that C-x C-c on an emacsclient frame should |
1129 | only close the frame, not exit the entire Emacs session. Update: | |
1130 | see above for a function that does this. Maybe this should be the | |
1131 | new default? | |
1132 | ||
1133 | (Done. This is the new default. No complaints so far.) | |
1134 | ||
68bba4e4 KL |
1135 | -- Clean up the frame-local variable system. I think it's ugly and |
1136 | error-prone. But maybe I just haven't yet fully understood it. | |
1137 | ||
1138 | (Nothing to do. It doesn't seem ugly any more. It's rather clever.) | |
856dd475 | 1139 | |
97c57fb2 KL |
1140 | -- Support multiple character locales. A version of |
1141 | `set-locale-environment' needs to be written for setting up | |
1142 | display-local settings on ttys. I think calling | |
1143 | set-display-table-and-terminal-coding-system and | |
1144 | set-keyboard-coding-system would be enough. The language | |
1145 | environment itself should remain a global setting. | |
1146 | ||
1147 | (Done, by an ugly hack.) | |
1148 | ||
1fb8c4ad KL |
1149 | -- The terminal customization files in term/*.el tend to change global |
1150 | parameters, which may confuse Emacs with multiple displays. Change | |
1151 | them to tweak only frame-local settings, if possible. (They tend | |
1152 | to call define-key to set function key sequences a lot.) | |
1153 | ||
1154 | (Done, by making `function-key-map' terminal-local (i.e., part of | |
1155 | struct kboard). This has probably covered all the remaining problems.) | |
1156 | ||
2a42d440 KL |
1157 | -- Make `function-key-map' and `key-translation-map' terminal-local. |
1158 | ||
1159 | (Done.) | |
1160 | ||
1161 | -- Implement `terminal-local-value' and `set-terminal-local-value' to | |
1162 | allow deterministic access to terminal local bindings. The | |
1163 | encode-kb package can not set up `key-translation-map' without | |
1164 | these. The terminal-local bindings seem to be independent of what | |
1165 | frame is selected. | |
1166 | ||
1167 | (Done.) | |
1168 | ||
28d440ab | 1169 | ;;; arch-tag: 8da1619e-2e79-41a8-9ac9-a0485daad17d |
2a42d440 | 1170 |