Mercurial > hg > xemacs-beta
annotate lisp/term/README @ 5820:b3824b7f5627
Some changes to eliminate warnings with Apple clang version 1.7.
src/ChangeLog addition:
2014-10-18 Aidan Kehoe <kehoea@parhasard.net>
Some changes to eliminate warnings with Apple clang version 1.7.
* cm.c (send_string_to_tty_console):
* doprnt.c (doprnt_2):
* doprnt.c (parse_off_posnum):
* event-stream.c (dribble_out_event):
Cast various calls to Lstream_putc() to void when the result isn't
being used, for the sake of clang.
* lisp.h:
Declare #'replace here too, it's used in event-stream.c.
* lisp.h (ALLOCA):
* lisp.h (MALLOC_OR_ALLOCA):
Cast a couple of zeros in the context of the ternary operator to
void to prevent unused value warnings with clang.
* sysdep.c (child_setup_tty):
* text.h (ASSERT_ASCTEXT_ASCII_LEN):
Use DO_NOTHING in these files to quieten the compiler.
lib-src/ChangeLog addition:
2014-10-18 Aidan Kehoe <kehoea@parhasard.net>
* ootags.c (substitute):
Cast the result of strlen to int before comparing it with a signed
value, for the sake of compiler warnings.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Sat, 18 Oct 2014 21:48:10 +0100 |
| parents | 6e27daf7cbc9 |
| children |
| rev | line source |
|---|---|
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1 Copyright (C) 1993, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
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2 Free Software Foundation, Inc. |
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3 See the end of the file for license conditions. |
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4 |
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5 |
| 0 | 6 This directory contains files of elisp that customize Emacs for certain |
| 7 terminal types. | |
| 8 | |
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9 When Emacs opens a new terminal, it checks the TERM environment variable to |
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10 see what type of terminal the user is running on, searches for an elisp file |
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11 named "term/${TERM}.el", and if one exists, loads it. If Emacs finds no |
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12 suitable file, then it strips the last hyphen and what follows it from TERM, |
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13 and tries again. If that still doesn't yield a file, then the previous hyphen |
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14 is stripped, and so on until all hyphens are gone. For example, if the |
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15 terminal type is `aaa-48-foo', Emacs will try first `term/aaa-48-foo.el', then |
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16 `term/aaa-48.el' and finally `term/aaa.el'. Emacs stops searching at the |
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17 first file found, and will not load more than one file for any terminal. Note |
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18 that it is not an error if Emacs is unable to find a terminal initialization |
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19 file; in that case, it will simply proceed with the next step without loading |
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20 any files. |
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21 |
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22 Once the file has been loaded (or the search failed), Emacs tries to call a |
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23 function named `terminal-init-TERMINALNAME' (eg `terminal-init-aaa-48' for the |
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24 `aaa-48' terminal) in order to initialize the terminal. Once again, if the |
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25 function is not found, Emacs strips the last component of the name and tries |
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26 again using the shorter name. This search is independent of the previous file |
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27 search, so that you can have terminal initialization functions for a family of |
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28 terminals collected in a single file named after the family name, and users |
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29 may put terminal initialization functions directly in their .emacs files. |
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30 |
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31 Note that an individual terminal file is loaded only once in an Emacs |
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32 session; if the same terminal type is opened again, Emacs will simply call the |
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33 initialization function without reloading the file. Therefore, all the actual |
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34 initialization actions should be collected in terminal-init-* functions; the |
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35 file should not contain any top-level form that is not a function or variable |
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36 declaration. Simply loading the file should not have any side effect. |
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37 |
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38 Similarly, the terminal initialization function is called only once on any |
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39 given terminal, when the first frame is created on it. The function is not |
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40 called for subsequent frames on the same terminal. Therefore, terminal-init-* |
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41 functions should only modify terminal-local variables (such as |
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42 `local-function-key-map') and terminal parameters. For example, it is not |
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43 correct to modify frame parameters, since the modifications will only be |
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44 applied for the first frame opened on the terminal. |
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45 |
| 0 | 46 |
| 47 When writing terminal packages, there are some things it is good to keep in | |
| 48 mind. | |
| 49 | |
| 50 First, about keycap names. Your terminal package can create any keycap | |
| 51 cookies it likes, but there are good reasons to stick to the set recognized by | |
| 52 the X-windows code whenever possible. The key symbols recognized by Emacs | |
| 53 are listed in src/term.c; look for the string `keys' in that file. | |
| 54 | |
| 55 For one thing, it means that you'll have the same Emacs key bindings on in | |
| 56 terminal mode as on an X console. If there are differences, you can bet | |
| 57 they'll frustrate you after you've forgotten about them. | |
| 58 | |
| 59 For another, the X keysms provide a standard set of names that Emacs knows | |
| 60 about. It tries to bind many of them to useful things at startup, before your | |
| 61 .emacs is read (so you can override them). In some ways, the X keysym standard | |
| 62 is a admittedly poor one; it's incomplete, and not well matched to the set of | |
| 63 `virtual keys' that UNIX terminfo(3) provides. But, trust us, the alternatives | |
| 64 were worse. | |
| 65 | |
| 66 This doesn't mean that if your terminal has a "Cokebottle" key you shouldn't | |
| 67 define a [cokebottle] keycap. But if you must define cookies that aren't in | |
| 68 that set, try to pattern them on the standard terminfo variable names for | |
| 69 clarity; also, for a fighting chance that your binding may be useful to someone | |
| 70 else someday. | |
| 71 | |
| 72 For example, if your terminal has a `find' key, observe that terminfo | |
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73 supports a key_find capability and call your cookie [find]. |
| 0 | 74 |
| 75 Here is a complete list, with corresponding X keysyms. | |
| 76 | |
| 77 ----------------------------------------------------------------------------- | |
| 78 Variable name cap X Keysym Description | |
| 79 -------------- --- ------------ ------------------------------------- | |
| 80 key_down kd down Sent by terminal down arrow key | |
| 81 key_up ku up Sent by terminal up arrow key | |
| 82 key_left kl left Sent by terminal left arrow key | |
| 83 key_right kr right Sent by terminal right arrow key | |
| 84 key_home kh home Sent by home key. | |
| 85 key_backspace kb Sent by backspace key | |
| 86 key_dl kd deleteline Sent by delete line key. | |
| 87 key_il kA insertline Sent by insert line. | |
| 88 key_dc kD Sent by delete character key. | |
| 89 key_ic kI insertchar (1) Sent by ins char/enter ins mode key. | |
| 90 key_eic KM Sent by rmir or smir in insert mode. | |
| 91 key_clear kC Sent by clear screen or erase key. | |
| 92 key_eos kS Sent by clear-to-end-of-screen key. | |
| 93 key_eol kE Sent by clear-to-end-of-line key. | |
| 94 key_sf kF Sent by scroll-forward/down key | |
| 95 key_sr kR Sent by scroll-backward/up key | |
| 96 key_npage kN next (2) Sent by next-page key | |
| 97 key_ppage kP prior (2) Sent by previous-page key | |
| 98 key_stab kT Sent by set-tab key | |
| 99 key_ctab kt Sent by clear-tab key | |
| 100 key_catab ka Sent by clear-all-tabs key. | |
| 101 key_enter @8 kp-enter Enter/send (unreliable) | |
| 102 key_print %9 print print or copy | |
| 103 key_ll kH Sent by home-down key | |
| 104 key_a1 K1 kp-1 Upper left of keypad | |
| 105 key_a3 K3 kp-3 Upper right of keypad | |
| 106 key_b2 K2 kp-5 Center of keypad | |
| 107 key_c1 K4 kp-7 Lower left of keypad | |
| 108 key_c3 K5 kp-9 Lower right of keypad | |
| 109 key_btab kB backtab Back tab key | |
| 110 key_beg @1 begin beg(inning) key | |
| 111 key_cancel @2 cancel cancel key | |
| 112 key_close @3 close key | |
| 113 key_command @4 execute (3) cmd (command) key | |
| 114 key_copy @5 copy key | |
| 115 key_create @6 create key | |
| 116 key_end @7 end end key | |
| 117 key_exit @9 exit key | |
| 118 key_find @0 find key | |
| 119 key_help %1 help key | |
| 120 key_mark %2 mark key | |
| 121 key_message %3 message key | |
| 122 key_move %4 move key | |
| 123 key_next %5 next (2) next object key | |
| 124 key_open %6 open key | |
| 125 key_options %7 menu (3) options key | |
| 126 key_previous %8 previous (2) previous object key | |
| 127 key_redo %0 redo redo key | |
| 128 key_reference &1 ref(erence) key | |
| 129 key_refresh &2 refresh key | |
| 130 key_replace &3 replace key | |
| 131 key_restart &4 reset (3) restart key | |
| 132 key_resume &5 resume key | |
| 133 key_save &6 save key | |
| 134 key_sbeg &9 shifted beginning key | |
| 135 key_select *6 select select key | |
| 136 key_suspend &7 suspend key | |
| 137 key_undo &8 undo undo key | |
| 138 | |
| 139 key_scancel &0 shifted cancel key | |
| 140 key_scommand *1 shifted command key | |
| 141 key_scopy *2 shifted copy key | |
| 142 key_screate *3 shifted create key | |
| 143 key_sdc *4 shifted delete char key | |
| 144 key_sdl *5 shifted delete line key | |
| 145 key_send *7 shifted end key | |
| 146 key_seol *8 shifted clear line key | |
| 147 key_sexit *9 shifted exit key | |
| 148 key_sf kF shifted find key | |
| 149 key_shelp #1 shifted help key | |
| 150 key_shome #2 shifted home key | |
| 151 key_sic #3 shifted input key | |
| 152 key_sleft #4 shifted left arrow key | |
| 153 key_smessage %a shifted message key | |
| 154 key_smove %b shifted move key | |
| 155 key_snext %c shifted next key | |
| 156 key_soptions %d shifted options key | |
| 157 key_sprevious %e shifted prev key | |
| 158 key_sprint %f shifted print key | |
| 159 key_sredo %g shifted redo key | |
| 160 key_sreplace %h shifted replace key | |
| 161 key_sright %i shifted right arrow | |
| 162 key_sresume %j shifted resume key | |
| 163 key_ssave !1 shifted save key | |
| 164 key_suspend !2 shifted suspend key | |
| 165 key_sundo !3 shifted undo key | |
| 166 | |
| 167 key_f0 k0 f0 (4) function key 0 | |
| 168 key_f1 k1 f1 function key 1 | |
| 169 key_f2 k2 f2 function key 2 | |
| 170 key_f3 k3 f3 function key 3 | |
| 171 key_f4 k4 f4 function key 4 | |
| 172 key_f5 k5 f5 function key 5 | |
| 173 key_f6 k6 f6 function key 6 | |
| 174 key_f7 k7 f7 function key 7 | |
| 175 key_f8 k8 f8 function key 8 | |
| 176 key_f9 k9 f9 function key 9 | |
| 177 key_f10 k; f10 (4) function key 10 | |
| 178 key_f11 F1 f11 function key 11 | |
| 179 : : : : | |
| 180 key_f35 FP f35 function key 35 | |
| 181 key_f36 FQ function key 36 | |
| 182 : : : : | |
| 183 key_f64 k1 function key 64 | |
| 184 | |
| 185 (1) The terminfo documentation says this may be the 'insert character' or | |
| 186 `enter insert mode' key. Accordingly, key_ic is mapped to the `insertchar' | |
| 187 keysym if there is also a key_dc key; otherwise it's mapped to `insert'. | |
| 188 The presumption is that keyboards with `insert character' keys usually | |
| 189 have `delete character' keys paired with them. | |
| 190 | |
| 191 (2) If there is no key_next key but there is a key_npage key, key_npage | |
| 192 will be bound to the `next' keysym. If there is no key_previous key but | |
| 193 there is a key_ppage key, key_ppage will be bound to the `previous' keysym. | |
| 194 | |
| 195 (3) Sorry, these are not exact but they're the best we can do. | |
| 196 | |
| 197 (4) The uses of the "k0" capability are inconsistent; sometimes it | |
| 198 describes F10, whereas othertimes it describes F0 and "k;" describes F10. | |
| 199 Emacs attempts to politely accommodate both systems by testing for | |
| 200 "k;", and if it is present, assuming that "k0" denotes F0, otherwise F10. | |
| 201 ----------------------------------------------------------------------------- | |
| 202 | |
| 203 The following X keysyms do *not* have terminfo equivalents. These are | |
| 204 the cookies your terminal package will have to set up itself, if you want them: | |
| 205 | |
| 206 break | |
| 207 system | |
| 208 user | |
| 209 kp-backtab | |
| 210 kp-space | |
| 211 kp-tab | |
| 212 kp-f1 | |
| 213 kp-f2 | |
| 214 kp-f3 | |
| 215 kp-f4 | |
| 216 kp-multiply | |
| 217 kp-add | |
| 218 kp-separator | |
| 219 kp-subtract | |
| 220 kp-decimal | |
| 221 kp-divide | |
| 222 kp-0 | |
| 223 kp-2 | |
| 224 kp-4 | |
| 225 kp-6 | |
| 226 kp-8 | |
| 227 kp-equal | |
| 228 | |
| 229 In general, you should not bind any of the standard keysym names to | |
| 230 functions in a terminal package. There's code in loaddefs.el that does that; | |
| 231 the less people make exceptions to that, the more consistent an interface Emacs | |
| 232 will have across different keyboards. Those exceptions should go in your | |
| 233 .emacs file. | |
| 234 | |
| 235 Finally, if you're using a USL UNIX or a Sun box or anything else with the | |
| 236 USL version of curses(3) on it, bear in mind that the original curses(3) had | |
| 237 (and still has) a very much smaller set of keycaps. In fact, the reliable | |
| 238 ones were just the arrow keys and the first ten function keys. If you care | |
| 239 about making your package portable to older Berkeley machines, don't count on | |
| 240 the setup code to bind anything else. | |
| 241 | |
| 242 If your terminal's arrow key sequences are so funky that they conflict with | |
| 243 normal Emacs key bindings, the package should set up a function called | |
| 244 (enable-foo-arrow-keys), where `foo' becomes the terminal name, and leave | |
| 245 it up to the user's .emacs file whether to call it. | |
| 246 | |
| 247 Before writing a terminal-support package, it's a good idea to read the | |
| 248 existing ones and learn the common conventions. | |
|
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249 |
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250 |
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251 This file is part of GNU Emacs. |
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252 |
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253 GNU Emacs is free software: you can redistribute it and/or modify |
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254 it under the terms of the GNU General Public License as published by |
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255 the Free Software Foundation, either version 3 of the License, or |
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256 (at your option) any later version. |
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257 |
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258 GNU Emacs is distributed in the hope that it will be useful, |
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259 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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260 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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261 GNU General Public License for more details. |
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Use GNU version which is GPLv3 or later.
Mats Lidell <matsl@xemacs.org>
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262 |
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6e27daf7cbc9
Use GNU version which is GPLv3 or later.
Mats Lidell <matsl@xemacs.org>
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263 You should have received a copy of the GNU General Public License |
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6e27daf7cbc9
Use GNU version which is GPLv3 or later.
Mats Lidell <matsl@xemacs.org>
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264 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |