Document Windows hourglass change.
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29b7722a 1GNU Emacs NEWS -- history of user-visible changes.
5b87ad55 2
dcb8ac09 3Copyright (C) 2007, 2008 Free Software Foundation, Inc.
5b87ad55 4See the end of the file for license conditions.
a933dad1 5
3f7194ed 6Please send Emacs bug reports to emacs-pretest-bug@gnu.org.
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7If possible, use M-x report-emacs-bug.
8
0bfd685e 9This file is about changes in Emacs version 23.
9a21d88b 10
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11See files NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18, and NEWS.1-17
12for changes in older Emacs versions.
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13
14You can narrow news to a specific version by calling `view-emacs-news'
15with a prefix argument or by typing C-u C-h C-n.
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16
17Temporary note:
18 +++ indicates that the appropriate manual has already been updated.
19 --- means no change in the manuals is called for.
20When you add a new item, please add it without either +++ or ---
21so we will look at it and add it to the manual.
22
05197f40 23\f
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24* About external Lisp packages
25
9c576ea0 26\f
0bfd685e 27* Installation Changes in Emacs 23.1
c58dccad 28
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29** The default X toolkit is now Gtk+, rather than Lucid.
30
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31** Fonts are handled by new code capable of dealing with multiple font
32backends. This requires the freetype and fontconfig libraries, and
33supports local fonts (fonts installed on the machine where Emacs is
34running). Additionally, the Xft library can be used for antialiasing
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35support, the otf library for complex text layout by OpenType fonts,
36and the m17n library for text shaping. Fontconfig-like font names
37(e.g. monospace-12) are accepted. The old font handling code can
38be used by passing the configure option `--disable-font-backend'
39(also available as a run-time option).
2b7a2553 40
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41** The new configuration option "--with-dbus" enables D-Bus language
42bindings for Emacs.
43
15f02f65 44** The Mac Carbon port is no longer supported.
79475ffb 45Instead, use... [FIXME what?]
15f02f65 46
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47** configure now checks for libgif before libungif when searching for
48a GIF library.
b5ac89f8 49
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50** Support for systems without alloca has been removed.
51
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52** Support for Sun windows has been removed.
53
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54** Support for many obsolete platforms has been removed.
55See the list at the end of etc/MACHINES for details.
56
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57** The `emacstool' utility has been removed.
58
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59** The configure options `--with-gcc', `--without-gcc' have been removed.
60Configure will use gcc by default. Set the CC environment variable if
61you need control over which C compiler is used.
62
0caa490b 63** The configure option `--with-gtk' has been removed. Gtk is now the
a46ee55c 64default toolkit, but you can use --with-x-toolkit=gtk if necessary.
4e5cdb4f 65\f
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66* Changes in Emacs 23.1
67
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68** Minibuffer input of shell commands now comes with completion.
69
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70** Operations like C-x b and C-x C-f which use switch-to-buffer do not fail
71any more when used in a minibuffer or a dedicated window. Instead, they
72fallback on using pop-to-buffer which will use some other window.
73
780d7bb9 74** Emacs now supports using both X displays and ttys in one session.
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75Start the server (M-x server-start). Then `emacsclient -t' creates a
76tty frame connected to the running emacs server. You can also use any
77number of different ttys. `emacsclient -c' creates a new X11 frame on
78the current $DISPLAY or a tty frame if $DISPLAY is not set.
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79
80You can test for the presence of this feature in your Lisp code by
81testing for the `multi-tty' feature.
82
0caa490b 83** The Emacs character set is now a superset of Unicode.
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84(It has about four times the code space, which should be plenty).
85
86The internal encoding used for buffers and strings is now
87Unicode-based and called `utf-8-emacs'. utf-8-emacs is backwards
88compatible with the UTF-8 encoding of Unicode. The `emacs-mule'
89coding system can still read and write data in the old internal encoding.
90
91Since the internal encoding is also used by default for byte-compiled
92files -- i.e. the normal coding system for byte-compiled Lisp files is
93now utf-8-Emacs -- Lisp containing non-ASCII characters which is
94compiled by Emacs 23 can't be read by earlier versions of Emacs. Files
95compiled by Emacs 20, 21, or 22 are loaded correctly as emacs-mule
96(whether or not they contain multibyte characters), which makes loading
97them somewhat slower than Emacs 23-compiled files. Thus it may be worth
98recompiling existing .elc files which don't need to be shared with older
99Emacsen.
100
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101** There are assorted new coding systems/aliases -- see M-x list-coding-systems.
102
103** There is a new charset implementation with many new charsets.
104See M-x list-character-sets. New charsets can be defined conveniently
105as tables of unicodes.
106
107The dimension of a charset is now 1, 2, 3, or 4, and the size of each
108dimension is no longer limited to 94 or 96.
109
110A dynamic charset priority list is used to infer the charset of
111characters for display.
112
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113** There are new Chinese-GBK, Chinese-GB18030, Khmer, Bengali,
114Punjabi, Gujarati, Oriya, Telugu, Sinhala, and TaiViet language
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115environments.
116
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117** Emacs now supports the XEmbed specification.
118You can embed Emacs in another application on X11. The new command line option
119--parent-id is used to pass the parent window id to Emacs. See
120http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
121for details about XEmbed.
122
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123** Emacs comes with a new set of default icons.
124Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
125The Emacs 22 icon is available as `emacs22.png' in the same location.
251ad2de 126
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127** Built-in functions (subr) can now have an interactive specification
128that is not a prompt string. If the `intspec' parameter of a `DEFUN'
129starts with a `(', the string is evaluated as a Lisp form.
130
131** set-file-modes is now interactive and can take the mode value in
132symbolic notation thanks to auxiliary functions.
133
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134** split-window-preferred-function specifies whether display-buffer should
135split windows vertically or horizontally.
136
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137** Emacsclient has been extended to support opening a new terminal
138frame. Its behavior has been changed to open a new Emacs frame by
139default. Use the -c option to get the old behavior of opening files in
140the currently selected Emacs frame.
141
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142** The refcards are now shipped as PDF files.
143
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144** Emacs now supports the SVG image format through librsvg2.
145
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146** Transient Mark Mode is now on by default.
147
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148** mark-even-if-inactive now defaults to t
149
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150** C-SPC C-SPC in transient-mark-mode pushes a mark without activating it.
151
75f6af19 152** If you set find-file-confirm-nonexistent-file to t, then C-x C-f
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153requires confirmation before opening a non-existent file.
154
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155** If the gpm mouse server is running and t-mouse-mode enabled, Emacs uses a
156Unix socket in a GNU/Linux console to talk to server, rather than faking events
157using the client program mev. This C level approach provides mouse
158highlighting, and help echoing in the minibuffer.
159
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160** The new variable next-error-recenter specifies how next-error should
161recenter the visited source file. Its value can be a number (for example,
1620 for top line, -1 for bottom line), or nil for no recentering.
163
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164** New command recenter-top-bottom moves the current line to window
165center, top and bottom on successive invokations.
166
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167** C-l is bound to the new command recenter-top-bottom, rather than recenter.
168
d87b5ced 169** The mode-line displays a `@' if the default-directory for the current buffer
1f2e1c75 170is on a remote machine, or a hyphen otherwise.
6c5d503f 171
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172** The mode-line displays a mode menu when mouse-1 is clicked on a minor mode,
173in the same way as it already did for major modes.
174
de3054d5 175** The new command balance-windows-area balances windows both vertically
62e3c31f 176and horizontally.
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177
178** The new command close-display-connection can be used to close a connection
179to a remote display, e.g. because the display is about to become unreachable.
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180
181** The command shell prompts for the default directory, when it is
182called with a prefix, and the default directory is a remote file name.
de3054d5 183This is because some file name handlers (like ange-ftp) are not able to
6c5d503f 184run processes remotely.
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185
186** The new command `display-time-world' starts an updating time display
187using several time zones, in a buffer.
c4c9b6f9 188
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189** The new function `format-seconds' converts a number of seconds into a
190readable string of days, hours, etc.
191
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192** The new variables `before-init-time' and `after-init-time' record the
193value of `current-time' before and after Emacs loads the init files.
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194
195** The new function `emacs-uptime' returns the uptime of an Emacs instance.
196
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197** The new function `emacs-init-time' returns the duration of the
198Emacs initialization.
199
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200** The minor modes unify-8859-on-encoding-mode, unify-8859-on-decoding-mode
201are obsolete.
202
6dadd99f 203\f
0bfd685e 204* Startup Changes in Emacs 23.1
21f7b9d8 205
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206** The option `inhibit-startup-screen' (with aliases to old names
207`inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit
208display of the initial message in the *scratch* buffer. If you don't
209want to display the initial message in the *scratch* buffer at startup,
210you can set the option `initial-scratch-message' to nil.
211
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212** New user option `initial-buffer-choice' specifies what to display
213after starting Emacs: startup screen, *scratch* buffer, visiting a
214file or directory.
215
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216** New alias `argv' for `command-line-args-left'
217This is a convenience alias, so that one can write `(pop argv)'
218inside of --eval command line arguments in order to access
219following arguments.
f8fd7ed3 220
2e3acc47 221** The new command-line option `--disable-font-backend' disables the
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222new font backend code at runtime. This option is not available if
223Emacs was compiled without font-backend support.
2e3acc47 224
f8fd7ed3 225** The abbrev file is no longer read at startup in batch mode.
c44da964 226\f
0bfd685e 227* Incompatible Editing Changes in Emacs 23.1
b58cb59f 228
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229+++
230** In Dired-x, all command guesses for ! are now added to the default
231list accessible by M-n instead of pushing all guesses temporarily into
232the history list.
233
406c0f12 234\f
0bfd685e 235* Editing Changes in Emacs 23.1
406c0f12 236
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237+++
238** C-M-% now shows replacement as it would look in the buffer, with
239`\N' and `\&' substituted according to the match. Old behavior can be
240restored by customizing `query-replace-show-replacement'.
241
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242+++
243** M-q now fills the region if the region is active and
244`transient-mark-mode' is turned on. Otherwise, it fills the current
ecde850a 245paragraph.
1ac03a31 246
ecde850a 247+++
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248** M-$ now checks spelling of the region if the region is active and
249`transient-mark-mode' is turned on. Otherwise, it checks spelling of the
250word at point.
251
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252** TAB now indents the region if the region is active and
253`transient-mark-mode' is turned on.
254
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255** `use-empty-active-region' controls whether an empty active region
256in Transient Mark mode should make commands operate on that empty region.
257
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258** C-z now invokes `suspend-frame', C-x C-c now invokes
259`save-buffers-kill-terminal'.
260
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261** New command kill-matching-buffers kills buffers whose name matches a regexp.
262
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263** You can disable kill ring commands from accessing the primary selection
264by setting `x-select-enable-primary' to nil.
265
266** If `select-active-regions' is t, setting the mark automatically
267makes the new region into the primary selection (for interaction with
268other window applications). If you enable this, you might want to bind
269`mouse-yank-primary' to Mouse-2.
539f5bda 270
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271** If `yank-pop-change-selection' is t, rotating the kill ring
272also updates the selection or clipboard to the current yank,
273just as M-w would do so with the text it copies to the kill ring.
274
505d8756 275** Minibuffer changes
297b8ccd 276
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277*** Many commands that read a buffer name now provide a list of all buffers
278sorted by recency in the list of minibuffer default values available
279via M-n or down-arrow. It is also possible to search this buffer list
280in the minibuffer using incremental search commands C-s and C-M-s
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281(for instance, `C-x b C-s substr RET RET' to select a buffer by part
282of the buffer name).
f3ed2b83 283
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284*** In C-x d, if you type M-n you get the visited file name of the
285current buffer.
286
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287*** In Dired, a list of commands for ! extracted from mailcap according to
288file extensions are added to the default list accessible by M-n.
289
290*** A list of regexp default values is available via M-n for `occur',
291`keep-lines', `flush-lines' and `how-many'. This list includes the active
292region in transient-mark-mode, the word under the cursor, the last isearch
293regexp, the last isearch string and the last replacement regexp.
294
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295*** isearch started in the minibuffer searches in the minibuffer history.
296Reverse isearch commands (C-r, C-M-r) search in previous minibuffer
297history elements, and forward isearch commands (C-s, C-M-s) search in
298next history elements. When the reverse search reaches the first history
299element, it wraps to the last history element, and the forward search
300wraps to the first history element. When the search is terminated, the
301history element containing the search string becomes the current.
302
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303** New faces
304
305*** `mode-line-emphasis' is used to highlight certain mode-line information;
306for example while waiting for a VC command to finish.
307
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308** Face changes
309
310*** The new function `face-all-attributes' returns an alist describing
311all the basic attributes of a given face.
312
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313\f
314* New Modes and Packages in Emacs 23.1
0091c67e 315
2e282009 316** FIXME add details of new packages imported from lisp/gnus.
143cecdb 317[Maybe some information from doc/misc/gnus-coding.texi can be reused]
2e282009 318
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319** The package doc-view.el has been added. It supports viewing of PDF,
320PostScript and DVI documents inside an Emacs buffer by converting the
321document to a set of PNG images first. One can also search for a
322regular expression in the document. The commentary of the file explains
323its usage.
324
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325** The nXML package has been added. It is a new mode for editing XML
326documents. nXML mode allows a schema to be associated with the XML
327document being edited. nXML mode uses Relax NG as its schema
328language. The schema is used to provide two key features:
329
330*** Continuous validation. nXML validates as you type, highlighting
331any invalid parts of your document.
332
333*** Completion. nXML can assist you in entering an element name,
334attribute name or data value by using information about what is
335allowed by the schema in that context.
a2e0b5dd 336
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337** A new game called `bubbles' has been added. This is a version of
338the "Same Game" with configurable difficulty level.
a0818148 339
dcd6e8d7 340** minibuffer-indicate-depth-mode shows the minibuffer depth in the prompt.
3f7194ed 341
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342** Remember Mode (remember.el) is now included with Emacs. It is a
343mode for quickly jotting down things to remember. Included with
344remember.el is a backend that can save notes to a Diary file. Please
345consult the Remember Manual for usage details.
346
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347** D-Bus language bindings for Elisp are provided by the package
348dbus.el and by extensions to the C modules of Emacs. D-Bus is an
349inter-process communication mechanism for applications residing on the
350same host, based on messages. See the manual for further details.
c154c0be 351
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352** EasyPG is now part of the Emacs distribution. It is an all-in-one
353GnuPG interface which includes GnuPG keyring browser, cryptographic
354operations on regions and files, and automatic encryption of *.gpg
355files. See the EasyPG Assistant User's Manual for further details.
e11910e2 356
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357** json.el is now included with Emacs. It is a library for parsing
358and generating JSON (JavaScript Object Notation). JSON is a
359lightweight data-interchange format.
360
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361** Auto Composition Mode is a minor mode that composes characters
362automatically when they are displayed. It is globally on by default.
363It uses `auto-composition-function' (default `auto-compose-chars').
364
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365** The package linum.el is now included with Emacs. It it a new minor
366mode to display line numbers for the current buffer.
367
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368** proced.el has been added. It operates on processes like dired.
369Proced makes an Emacs buffer containing a listing of the current processes
370(using ps(1)). You can use the normal Emacs commands to move around in
371this buffer, and special Proced commands to operate on the processes listed.
372
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373\f
374* Changes in Specialized Modes and Packages in Emacs 23.1
61d244ca 375
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376** A new `whitespace' package has been installed, and the pre-existing one
377renamed to `old-whitespace'.
378[FIXME someone explain why this is good, if it is...]
379
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380** In Change Log mode, the new function `change-log-find-file', bound to
381C-c C-f, finds the file associated with the current log entry.
e8cbfb8d 382
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383** abbrev was rewritten in Elisp and extended with more flexibility.
384*** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
385 abbrev-table-p.
386*** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
387*** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
388 extra arguments for arbitrary properties.
389*** New variable `abbrev-minor-mode-table-alist'.
390*** `local-abbrev-table' can hold a list of abbrev-tables.
391*** Abbrevs have now the following special properties:
79415279 392 `:count', `:system', `:enable-function', `:case-fixed'.
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393*** Abbrev-tables have now the following special properties:
394 `:parents', `:case-fixed', `:enable-function', `:regexp',
395 `abbrev-table-modiff'.
396
505d8756 397** Help mode
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398*** New macro `with-help-window' should set up help windows better
399than `with-output-to-temp-buffer' with `print-help-return-message'.
400*** New option `help-window-select' permits to customize whether help
401window shall be automatically selected when invoking help.
402*** New variable `help-window-point-marker' permits to specify new
b0d2d4e8 403position of point in help window (for example in `view-lossage').
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404
405** view-remove-frame-by-deleting is now by default t
b0d2d4e8 406since users found iconification of view-mode frames distracting.
0253fffa 407
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408** Isearch mode
409
410*** New command `isearch-occur' bound to `M-s o' in isearch mode
411runs `occur' with the current search string.
412
413*** isearch can now search through multiple ChangeLog files.
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414When running isearch in a ChangeLog file, if the search fails,
415then another C-s tries searching the previous ChangeLog,
416if there is one (e.g. go from ChangeLog to ChangeLog.12).
417
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418This is enabled if isearch-buffers-multi is non-nil.
419
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420*** The part of an isearch that failed to match is highlighted in `isearch-fail'
421face.
422
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423** smerge-refine highlights word-level details of changes in conflict.
424It's used automatically as you move through conflicts, see smerge-auto-refine.
425
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426** Diff mode
427
428*** diff-refine-hunk highlights word-level details of changes in a diff hunk.
429It's used automatically as you move through hunks, see
430diff-auto-refine. It is bound to `C-c C-b'.
431
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432*** diff-add-change-log-entries-other-window iterates through the diff
433buffer and tries to create ChangeLog entries for each change.
434It is bound to `C-x 4 A'.
c3bb6fdb 435
e6a01e4e 436** archive-mode has basic support to browse Rar archives.
c3bb6fdb 437
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438** talk.el has been extended for multiple tty support.
439
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440** compilation-auto-jump-to-first-error tells `compile' to jump to
441the first error encountered during compilations.
442
b68769f2 443** In the `copyright' package, you can specify your copyright holders' names.
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444Only copyright lines with holders matching copyright-names-regexp will be
445considered for update.
446
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447** eldoc highlights the function argument under point
448with the face `eldoc-highlight-function-argument'.
449
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450** hide-ifdef-mode permits to shadow ifdef-blocks instead of hiding them.
451See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.
452
b68769f2 453+++
8d5cc579 454** defcustom accepts new keyword arguments, `:safe' and `:risky', which
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455set a variable's `safe-local-variable' and `risky-local-variable' property.
456
505d8756 457** Etags changes
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458*** The --members option is now the default.
459
460Use --no-members if you want the old default behaviour of not tagging
461struct members in C, members variables in C++ and variables in PHP.
462
56dada42 463** VC
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464*** Clicking on the VC mode-line entry now pops the VC menu.
465
9372a958 466*** The VC mode-line entry now has a tooltip that explains the VC file status.
cb223bba 467
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468*** VC now supports applying VC operations to a set of files at a time.
469
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470This enables VC to work much more effectively with changeset-oriented
471version-control systems such as Subversion, GNU Arch, Mercurial, and
0caa490b 472Bzr. VC will now pass a multiple-file commit to these systems
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473as a single changeset.
474
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475*** In VC Annotate mode, you can type V to toggle the annotation visibility.
476
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477*** In VC Annotate mode, you can type f to show the file revision on
478the current line.
479
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480*** vc-git supports the "git grep" command.
481
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482** log-edit now has a command bound to C-c C-d to show the diff for
483the files involved.
484
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485** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.
486
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487** The appearance of superscript and subscript in TeX is more customizable.
488See the documentation of the variables: tex-fontify-script,
489tex-font-script-display, tex-suscript-height-ratio, and
490tex-suscript-height-minimum.
491
505d8756 492** BibTeX mode
2793c9bb 493
0caa490b 494*** New command `bibtex-initialize' (re)initializes BibTeX buffers.
c5578d5f 495
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496*** New `bibtex-entry-format' options `whitespace', `braces', and
497`string', disabled by default.
498
499*** New variable `bibtex-cite-matcher-alist' contains rules to
0f3cd6b2 500identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
2793c9bb 501
c5578d5f 502*** Command `bibtex-url' allows multiple URLs per entry.
2793c9bb 503
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504+++
505** Tramp
506
507*** New connection methods.
508The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have
509been introduced. There are also new so-called gateway methods
510"tunnel" and "socks".
511
512*** Multihop syntax has been removed.
513The pseudo-method "multi" has been removed. Instead of, multi hops
514can be specified by the new variable `tramp-default-proxies-alist'.
515
516*** More default settings.
517Default values can be set via the variables `tramp-default-user',
518`tramp-default-user-alist' and `tramp-default-host'.
519
520*** Connection information is cached.
521In order to reduce connection setup, information about used
522connections are kept persistent in a file. The name of this file is
523defined in the variable `tramp-persistency-file-name'.
524
525*** Control of remote processes.
526Running processes on a remote host can be controlled by settings in
527`tramp-remote-path' and `tramp-remote-process-environment'.
528
529*** Success of remote copy is checked.
530When the variable `file-precious-flag' is set, the success of a remote
531file copy is checked via the file's checksum.
532
d15f7b68
GM
533** Miscellaneous programming mode changes
534
da26ea8d
GM
535*** The file etc/emacs.py now supports both Python 2 and 3, meaning
536that either version can be used as inferior Python by python.el.
c3f01f42 537
4c24d241
GM
538*** Python mode now has `pdbtrack' functionality. When using pdb to
539debug a Python program, pdbtrack notices the pdb prompt and displays
540the source file and line that the program is stopped at, much the same
541way as gud-mode does for debugging C programs with gdb.
542
d15f7b68
GM
543*** The variable `fortran-line-length' can change the fixed-form line-length.
544
a9f480e8
GM
545*** In Fortran mode, M-; is now bound to the standard comment-dwim,
546rather than fortran-indent-comment.
547
b68769f2
GM
548+++
549*** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
2fb6c6be 550
cf944fa4
RS
551** Gnus package
552
553*** The Gnus package has been updated
554
143cecdb
RS
555*** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for
556saving articles drafts and ~/.newsrc.eld. These file may not be read
557correctly in Emacs 22 and below. If you want to Gnus across different Emacs
558versions, you may set `mm-auto-save-coding-system' to `emacs-mule'.
559
cf944fa4
RS
560*** There are many news features, bug fixes and improvements.
561
562See the file GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.
563
d15f7b68
GM
564** Miscellaneous
565
566*** comint-mode uses `start-file-process' now (see Lisp Changes).
cc213f24
MA
567If `default-directory' is a remote file name, subprocesses are started
568on the corresponding remote system.
569
d15f7b68 570*** C-x C-q in dired-mode now runs the command wdired-change-to-wdired-mode,
40aa8257
JL
571and C-x C-q in wdired-mode exits it with asking a question about
572saving changes.
d15f7b68 573
4596901f
GM
574*** The new command `eshell/info' runs info in an eshell buffer.
575
1752e205
GM
576*** The pcmpl-unix package supports hostname completion for ssh and scp.
577
3cf86f00
GM
578*** WoMan tries to add locale-specific manual page directories to the
579search path. This can be disabled by setting `woman-locale' to nil.
580
4d1e89e3
GM
581*** The new variable `ffap-rfc-directories' specifies a list of local
582directories in which `ffap-rfc' will first search for RFCs.
583
d2c98acc 584*** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
b7bfcc8a 585It is used to configure wireless interfaces.
d2c98acc 586
0bfd685e
GM
587\f
588* Changes in Emacs 23.1 on non-free operating systems
8ab314f9 589
672f99b6
JR
590---
591** IPv6 is supported on MS-Windows.
592Emacs now supports IPv6 on Windows XP and later, and earlier versions
0caa490b 593of Windows with third party IPv6 stacks installed. Previously IPv6 was
672f99b6
JR
594supported on other platforms, but not on Windows due to using the winsock
5951.1 header file, even though Emacs was linking to the winsock 2 library.
596
6e344060
JR
597** Busy cursor (hourglass) now displays on MS-Windows.
598When Emacs is busy, an hourglass mouse cursor is displayed on Windows.
599Previously only X supported the busy cursor.
600
3280c5c5
JR
601** More keys available on MS-Windows.
602Keys normally associated with IMEs, and some exotic keys not normally found
603on standard keyboards have been given names so they can be bound to functions
604inside Emacs. If there are keys on your keyboard that have not been exposed
605to Emacs in the past, try C-h k to see if they are available now.
606
607Emacs can now bind functions to the extra buttons for media player and
608browser control present on some keyboards. These buttons are disabled
609by default, since enabling them prevents their system-wide use when
610Emacs has focus. To enable them, set the variable
0caa490b 611w32-pass-multimedia-buttons to nil. See the doc string of that variable
3280c5c5 612for the list of extra keys that are available.
0bfd685e
GM
613\f
614* Incompatible Lisp Changes in Emacs 23.1
8ec65cd7 615
4972c361
SM
616** The multibyteness of process filters is determined by the coding-system
617used for decoding. The functions `process-filter-multibyte-p' and
618`set-process-filter-multibyte' are obsolete.
619
d82c3d44
GM
620** The behavior of map-char-table has changed. It may call the
621specified function with a cons (FROM . TO) as a key if characters in
622that range have the same value.
623
624** The value of the function `charset-id' is now always 0.
625
626** The functions `register-char-codings' and `coding-system-spec'
627have been removed.
628
6a6b4d7d
KH
629** The cpXXX coding systems are now supported automatically. The
630functions cp-...-codepage, which you had to use in Emacs 22 to enable
631support for these coding systems, have been deleted.
d82c3d44 632
03605a28
MA
633+++
634** The function `dired-call-process' has been removed.
635
777ea444 636** The variable `byte-compile-warnings' can now be a list starting with `not',
0caa490b 637meaning to disable the specified warnings. The meaning of this list
777ea444 638may therefore be the reverse of what you expect (of course, this is
0caa490b 639only an issue if you make use of the new `not' syntax). Rather than
777ea444
GM
640checking/manipulating elements directly, use the new functions
641`byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
642`byte-compile-enable-warning.'
643
69df9d6d
GM
644** `mode-name' is no longer guaranteed to be a string.
645Use `(format-mode-line mode-name)' to ensure a string value.
646
85a1f98d
GM
647** The following features have been removed. They were used for
648displaying various scripts with specific fonts, and are no longer
649needed now that OpenType font support is available:
650
651*** `devanagari' and `devan-util', and all associated devanagari-* and
652dev-* functions and variables (formerly used for Devanagari script).
653
654*** `kannada' and `knd-util', and all associated kannada-* and knd-*
655functions and variables (formerly used for Kannada script).
656
657*** `malayalam' and `mlm-util', and all associated malayalam-* and
658mlm-* functions and variables (formerly used for Malayalam script).
659
660*** `tamil' and `tml-util, and all associated tamil-* and tml-*
661functions and variables (formerly used for Tamil script).
6a6b4d7d 662
0bfd685e
GM
663\f
664* Lisp Changes in Emacs 23.1
8ab314f9 665
e5c4079c
SM
666** The `read-shell-command' function does what its name says, with completion.
667It uses the minibuffer-local-shell-command-map for that.
668
669** The `buffer-swap-text' function can swap the text between two buffers.
13cda5f9
SM
670This can be useful for modes such as tar-mode, archive-mode, RMAIL.
671
a2bc5bdd
SM
672** `clear-image-cache' can be told to flush only images of a specific file.
673
64663f06 674** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
d82c3d44 675
50bfa18a 676** `beginning-of-defun-function' now takes one argument, the count
d82c3d44 677 given to `beginning-of-defun'.
50bfa18a 678
39d0bf74
RS
679** The variable `inhibit-changing-match-data', if non-nil, prevents the
680search and match primitives from changing the match data.
681
59b5d020
JL
682+++
683** New function `match-substitute-replacement' returns the result of
684`replace-match' without actually using it in the buffer.
685
2d105adf
RS
686** If a local hook function has a non-nil `permanent-local-hook'
687property, then `kill-all-local-variables' does not remove it from
688the local value of the hook variable. This means it remains
689even if you change major modes.
690
b9694062
JL
691+++
692** A list of default values can be specified for the DEFAULT argument of
693functions `read-from-minibuffer', `read-string', `read-command',
694`read-variable', `read-buffer', `completing-read'. Elements of this list
695are available for inserting into the minibuffer by typing `M-n'.
696For empty input these functions return the first element of this list.
697
66dc1ca2
RS
698** `custom-note-var-changed' tells Custom to treat the change in a certain
699variable as having been made within Custom.
700
ab6198b2
SM
701** `frame-inherited-parameters' lets new frames inherit parameters from
702the selected frame.
66dc1ca2 703
c60d543d 704** Commands should use `use-region-p' to test whether there is
d03b9b31
RS
705an active region that they should operate on.
706
c60d543d
RS
707** `region-active-p' returns non-nil when Transient Mark mode
708is enabled and there is an active region. This is NOT the best function
709to use to test whether a command should operate on the region instead
710of the usual behavior -- for that, use `use-region-p'.
711
4f4a84ec
SM
712** New keymap `input-decode-map' overrides like key-translation-map, but
713applies before function-key-map. Also it is terminal-local contrary to
714key-translation-map. Terminal-specific key-sequences are generally added to
715this map rather than to function-key-map now.
716
967b2682
GM
717** The new macro `declare-function' suppresses compiler warnings about
718undefined functions. The new `check-declare' package verifies that such
719statements are accurate (i.e. the functions are actually defined in
720the specified files).
721
d9774611
RS
722** The new function `read-color' reads a color name using the minibuffer.
723
63571b5a
RS
724** `interprogram-paste-function' can now return one string or a list
725of strings. In the latter case, Emacs puts the second and following
726strings on the kill ring.
727
d82c3d44
GM
728** Character code, representation, and charset changes.
729
0caa490b 730The character code space is now 0x0..0x3FFFFF with no gap.
d82c3d44
GM
731Characters of code 0x0..0x10FFFF are Unicode characters of the same code points.
732Characters of code 0x3FFF80..0x3FFFFF are raw 8-bit bytes.
733
0caa490b 734Generic characters no longer exist.
d82c3d44
GM
735
736In buffer and string, characters are represented by UTF-8 byte
737sequence in a multibyte buffer/string.
738
739The concept of a charset has changed. A single character may belong to
740multiple charsets (e.g. a-grave, U+00E0, belongs to charsets unicode,
741iso-8859-1, iso-8859-3, etc).
742
743*** The new function `characterp' returns t if and only if the argument
db4f9d2a 744is a character. This replaces `char-valid-p', which is now obsolete.
d82c3d44
GM
745
746*** The new function `max-char' returns the maximum character code
747(currently it is #x3FFFFF).
748
749*** The functions `encode-char' and `decode-char' now accept any character sets.
750
751*** The function `define-charset' now accepts a completely different
752form of arguments (old-style arguments still work).
753
754*** The new function `define-charset-alias' defines an alias of a charset.
755
756*** The value of the function `char-charset' depends on the current
757priorities of charsets.
758
759*** The new function `charset-priority-list' returns the list of
760charsets ordered by priority.
761
762*** The new function `set-charset-priority' sets priorities of charsets.
763
764*** The new function `unibyte-charset' returns the current unibyte
765charset. The unibyte charset determines how unibyte/multibyte
766conversion is done.
767
768*** The new function `set-unibyte-charset' sets the unibyte charset.
769
770*** The new function `unibyte-string' make a unibyte string from bytes.
771
772*** The new function `define-char-code-property' defines a character
773code property.
774
775*** The new function `char-code-property-description' returns the
776description string of a character code property.
777
778*** The function get-char-code-property now accepts many Unicode base
779character properties. They are `name', `general-category',
780`canonical-combining-class', `bidi-class', `decomposition',
781`decimal-digit-value', `digit-value', `numeric-value', `mirrored',
782`old-name', `iso-10646-comment', `uppercase', `lowercase', and
783`titlecase'.
784
785*** The new variable `find-word-boundary-function-table' is a
786char-table of functions to search for a word boundary.
787
788*** The new variable `char-script-table' is a char-table of script names.
789
790*** The new variable `char-width-table' is a char-table of character widths.
791
792*** The new variable `print-charset-text-property' controls how to
793handle `charset' text property on printing a string.
794
795*** The new variable `printable-chars' is a char-table defining if a
796character is printable or not.
797
798*** The functions `modify-syntax-entry' and `modify-category-entry' now
799accepts a cons of characters as the first argument, and modify all
800entries in that range of characters.
801
505d8756 802** Code conversion changes
d82c3d44
GM
803
804*** The new function `define-coding-system' should be used to define a
805coding system instead of `make-coding-system' (which is now obsolete).
806
807*** The functions `encode-coding-region' and `decode-coding-region'
808have an optional 4th argument to specify where the result of
809conversion should go.
810
811*** The functions `encode-coding-string' and `decode-coding-string'
812have an optional 4th argument specifying a buffer to store the result
813of conversion.
814
815*** The new function `with-coding-priority' executes the body part with
816the specified coding system priority order.
817
818*** The new function `check-coding-systems-region' checks if the text
819in the region is encodable by the specified coding systems.
820
821*** The new function `coding-system-aliases' returns a list of aliases
822of a coding system.
823
824*** The new function `coding-system-charset-list' returns a list of
825charsets supported by a coding system.
826
827*** The new function `coding-system-priority-list' returns a list of
828coding systems ordered by their priorities.
829
830*** The new function `set-coding-system-priority' sets priorities of
831coding systems.
832
833*** The functions `set-coding-priority' and `make-coding-system' are obsolete.
834
835** There is a new input method, Robin, different from Quail.
0caa490b 836It has three functionalities:
d82c3d44
GM
837 i) a simple input method (converts an ASCII sequence into a string).
838ii) converts an existing buffer substring into another string
839iii) reverse conversion (each character produced by a
840robin rule can hold the original ASCII sequence as a char-code-property)
841
842*** The new function `robin-define-package' defines a Robin package.
843
844*** The new function `robin-modify-package' modifies an existing Robin package.
845
846*** The new function `robin-use-package' starts using a Robin package
847as an input method.
848
505d8756 849** Changes related to the new font backend
2b7a2553 850
b19aa6dd
GM
851Which font backends to use can be specified by the X resource "FontBackend".
852For instance, to use both X core fonts and Xft fonts:
2b7a2553 853
b19aa6dd 854Emacs.FontBackend: x,xft
2b7a2553 855
b19aa6dd
GM
856If this resource is not set, Emacs tries to use all font backends
857available on your graphic device.
d82c3d44
GM
858
859*** New frame parameter `font-backend' specifies a list of
860font-backends supported by the frame's graphic device. On X, they are
861currently `x' and `xft'.
862
863*** New function `fontp' checks if the argument is a font-spec or font-entity.
864
865*** New function `font-spec' creates a new font-spec object.
866
867*** New function `font-get' returns a font property value.
868
869*** New function `font-put' sets a font property value.
870
871*** New function `list-fonts' returns a list of font-entities matching
872the given specification.
873
874*** New function `list-families' returns a list of family names of
875available fonts.
876
877*** New function `font-font' returns a font-entity best matching with
878the given specification.
879
880*** New function `font-xlfd-name' returns an XLFD name of a given font
881(font-spec, font-entity, or font-object).
882
883*** New function `clear-font-cache' clears all font caches.
884
885*** The function `set-fontset-font' now accepts a script name as the
886second argument, and has an optional 5th argument to control how to
887set the font.
888
505d8756 889** Changes related to multiple tty support
24cdde13 890
b12f6e85
SM
891*** $TERM is now set to `dumb' for subprocesses. If you want to know the
892$TERM inherited by Emacs you will have to look inside initial-environment.
893
6168122d
SM
894*** $DISPLAY is now dynamically inherited from the frame's `display'.
895
0caa490b 896*** The `window-system' variable has been made frame-local. The new
24cdde13
GM
897`initial-window-system' variable contains the `window-system' value
898for the first frame.
899
900*** You can specify a terminal device (`tty' parameter) and a terminal
901type (`tty-type' parameter) to `make-terminal-frame'.
902
903*** The new function `make-frame-on-tty' allows you to create a new
904frame on another tty device interactively.
905
906*** The function `make-frame-on-display' now works during a tty
907session, and `make-frame-on-tty' works during a graphical session.
908
da406961 909*** New functions: `delete-tty', `suspend-tty', `resume-tty'.
24cdde13 910
419f8f49
SM
911*** A new data type for terminals with functions: `get-device-terminal',
912`terminal-parameters', `terminal-parameter', `set-terminal-parameter'.
24cdde13 913
1816bda7 914*** New hooks: `suspend-tty-functions' and `resume-tty-functions'
92cd6a7c 915are called after a tty frame has been suspended or resumed,
de3054d5 916respectively. The functions are called with the terminal id of the frame
92cd6a7c
DN
917being suspended/resumed as a parameter.
918
01ff458e 919*** New function: `environment'.
da406961 920
4f4a84ec 921*** New variable: `local-function-key-map'.
01ff458e
SM
922This in addition to the global function-key-map variable that
923already existed. The global variable is not used directly any more;
924instead, the local-function-key-map is initialized so as to inherit from
925function-key-map.
da406961 926
82866ad5
SM
927*** `initial-environment' holds the environment inherited from Emacs's parent.
928
24cdde13
GM
929*** The `keyboard-translate-table' variable and the terminal and
930keyboard coding systems have been made terminal-local.
931
1aa423e9
SM
932*** In addition to the global function-key-map, Emacs has terminal-local
933local-function-key-map variables, and uses them instead of the
24cdde13
GM
934global keymaps to set up translations and function key sequences
935relevant to a specific terminal device.
936
937
90ab5c62
SM
938** You can now also pass the value of the `invisible' property to invisible-p
939to check whether it would cause the text to be invisible. Convenient when
940checking invisibility of text which has no buffer position
941(e.g. in before/after-strings).
9f44d41a 942
ea2e3ef4
RS
943** Non-breaking space now acts as whitespace.
944
41bd52f7 945+++
8d371994
RS
946** In `condition-case', a handler can specify "let the debugger run first".
947
948You do this by writing `debug' in the list of conditions to be handled,
949like this:
950
951 (condition-case nil
952 (foo bar)
953 ((debug error) nil))
954
0a963185
SM
955** The `require-match' argument to `completing-read' accepts a new value
956`confirm-only'.
957
c69b0314
SM
958+++
959** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.
960
9f44d41a
RS
961** New function `window-full-width-p' returns t if a window is as wide
962as its frame.
963
964** The new function `split-string-and-unquote' does (what?)
965
966** The new function `combine-and-quote-strings' does (what?)
967
968** The new function `image-refresh' refreshes all images associated
969with a given image specification.
970
abf13a8b
CY
971+++
972** New variable `user-emacs-directory'.
973Use this instead of "~/.emacs.d".
974
b2b387f9 975+++
0f3cd6b2 976** The new function `start-file-process' is similar to `start-process',
b2b387f9 977but obeys file handlers. The file handler is chosen based on
6dbe7eb4
MA
978`default-directory'. The functions `start-file-process-shell-command'
979and `process-file-shell-command' are also new; they call internally
0f3cd6b2 980`start-file-process' and `process-file', respectively.
b2b387f9 981
967b2682
GM
982** The new function `process-lines' executes an external program and
983returns its output as a list of lines.
984
64639e26 985+++
41bd52f7
MA
986** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED.
987IDENTIFICATION specifies which part of the remote identifier has to be
988returned. With CONNECTED passed non-nil, it is checked whether a
989remote connection has been established already.
64639e26 990
45595a4f
RS
991** The two new functions `looking-at-p' and `string-match-p' can do
992the same matching as `looking-at' and `string-match' without changing
993the match data.
89835619
SM
994
995** The interactive-form of a function can be added post-facto via the
996`interactive-form' symbol property. Mostly useful to add complex interactive
997forms to subroutines.
9bae34bf 998\f
0bfd685e 999* New Packages for Lisp Programming in Emacs 23.1
efeb796b 1000
9097e8af
RS
1001** The package isearch-multi.el has been added. It implements a new mode
1002`isearch-buffers-minor-mode' that allows isearch to search through
1003multiple buffers. In this mode a new variable
1004`isearch-buffers-next-buffer-function' defines the function to call
1005to get the next buffer to search in the series of multiple buffers.
1006
d53a60a6
TTN
1007** The new package avl-tree.el deals with the AVL tree data structure.
1008
05197f40 1009\f
a933dad1 1010----------------------------------------------------------------------
5b87ad55 1011This file is part of GNU Emacs.
a933dad1 1012
5b87ad55
GM
1013GNU Emacs is free software; you can redistribute it and/or modify
1014it under the terms of the GNU General Public License as published by
64be3a42 1015the Free Software Foundation; either version 3, or (at your option)
5b87ad55
GM
1016any later version.
1017
1018GNU Emacs is distributed in the hope that it will be useful,
1019but WITHOUT ANY WARRANTY; without even the implied warranty of
1020MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1021GNU General Public License for more details.
a933dad1 1022
5b87ad55
GM
1023You should have received a copy of the GNU General Public License
1024along with GNU Emacs; see the file COPYING. If not, write to the
1025Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
1026Boston, MA 02110-1301, USA.
a933dad1 1027
05197f40 1028\f
a933dad1
DL
1029Local variables:
1030mode: outline
1031paragraph-separate: "[ \f]*$"
1032end:
ab5796a9 1033
a533413c 1034arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2