doc/emacs/anti.texi

   1 @c This is part of the Emacs manual.
   2 @c Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   3 @c See file emacs.texi for copying conditions.
   4
   5 @node Antinews, Mac OS, X Resources, Top
   6 @appendix Emacs 22 Antinews
   7
   8   For those users who live backwards in time, here is information
   9 about downgrading to Emacs version 22.3.  We hope you will enjoy the
  10 greater simplicity that results from the absence of many Emacs
  11 @value{EMACSVER} features.
  12
  13 @itemize @bullet
  14
  15 @item
  16 The Fontconfig font library is no longer supported.  To specify a
  17 font, you must use an XLFD (X Logical Font Descriptor).  The other
  18 ways of specifying fonts---so-called ``Fontconfig'' and ``GTK'' font
  19 names---are clearly redundant, and have been removed.
  20
  21 @item
  22 We have switched to a character representation specially designed for
  23 Emacs.  Rather than forcing all the widely used scripts artificially
  24 into alignment, like Unicode does, Emacs treats them all equally,
  25 giving each one a place in the space of character codes.  Thus,
  26 scripts do not need to fight over characters used in each one of them,
  27 as each has its own variant, and they all are different as far as
  28 Emacs is concerned.  For example, there's a Latin-1 c-cedilla
  29 character, and there's a Latin-2 c-cedilla; searching a buffer for the
  30 Latin-1 variant will only find that variant, but not the others.  This
  31 design allows us to get rid of a confusing situation in Emacs 23,
  32 whereby a character can simultaneously belong to any number of
  33 charsets.
  34
  35 @item
  36 Emacs now uses an internal encoding, known as @samp{emacs-mule}, which
  37 is peculiar to Emacs and does not map easily into any of the existing
  38 character encodings, including Unicode.  This was imperative to
  39 support several different variants of the same character, each one
  40 belonging to its own script: @samp{emacs-mule} marks each character
  41 with its script, to better discern them from one another.
  42
  43 @item
  44 For simplicity, the functions @code{encode-coding-region} and
  45 @code{decode-coding-region} no longer accept an argument saying where
  46 to store the result of their conversions.  The result always replaces
  47 the original, so there's no need to look for it elsewhere.
  48
  49 @item
  50 Emacs no longer performs font anti-aliasing.  If your fonts look ugly,
  51 try choosing a larger font and increasing the screen resolution.
  52 Admittedly, this becomes difficult as you go further back in time,
  53 since available screen resolutions will decrease.
  54
  55 @item
  56 Emacs has added support for some soon-to-be-non-obsolete platforms.
  57 These include GNU/Linux systems based on libc version 5, BSD systems
  58 based on the COFF executable format, Solaris versions less than 2.6,
  59 and many more.
  60
  61 @item
  62 Emacs can no longer display frames on X windows and text terminals
  63 (ttys) simultaneously.  If you start Emacs as an X application, the
  64 Emacs job can only create X frames; if you start Emacs on a tty, the
  65 Emacs job can only use that tty.  No more confusion about which type
  66 of frame will @command{emacsclient} use in any given Emacs session!
  67
  68 @item
  69 Emacs can no longer be started as a daemon.  We decided that having an
  70 Emacs sitting silently in the background with no visual manifestation
  71 anywhere in sight is too confusing.
  72
  73 @item
  74 Transient Mark mode is now disabled by default.  Furthermore, some
  75 commands that operate specifically on the region when it is active and
  76 Transient Mark mode is enabled (such as @code{fill-paragraph}
  77 @code{ispell-word}, and @code{indent-for-tab-command}), no longer do
  78 so.
  79
  80 @item
  81 The line motion commands, @kbd{C-n} and @kbd{C-p}, now move by logical
  82 text lines, not screen lines.  Even if a long text line is continued
  83 over multiple screen lines, @kbd{C-n} and @kbd{C-p} treat it as a
  84 single line, because that's ultimately what it is.
  85
  86 @item
  87 Visual Line mode, which provides ``word wrap'' functionality, has been
  88 removed.  You can still use Long Lines mode to gain an approximation
  89 of word wrapping, though this has some drawbacks---for instance,
  90 syntax highlighting often doesn't work well on wrapped lines.
  91
  92 @item
  93 The variable @code{shift-select-mode} has been deleted; holding
  94 @key{shift} while typing a motion command no longer creates a
  95 temporarily active region.  You can still create temporarily active
  96 regions by dragging the mouse.
  97
  98 @item
  99 @kbd{C-l} now runs @code{recenter} instead of
 100 @code{recenter-top-bottom}.  This always sets the current line at the
 101 center of the window, instead of cycling through the center, top, and
 102 bottom of the window on successive invocations of @kbd{C-l}.  This
 103 lets you type @kbd{C-l C-l C-l C-l} to be @emph{absolutely sure} that
 104 you have recentered the line.
 105
 106 @item
 107 Typing @kbd{M-n} at the start of the minibuffer history list no longer
 108 attempts to generate guesses of possible minibuffer input.  It instead
 109 does the straightforward thing, by issuing the message @samp{End of
 110 history; no default available}.
 111
 112 @item
 113 Individual buffers can no longer display faces specially.  The text
 114 scaling commands @kbd{C-x C-+}, @kbd{C-x C--}, and @kbd{C-x C-0} have
 115 been removed, and so has the buffer face menu bound to
 116 @kbd{S-down-mouse-1}.
 117
 118 @item
 119 VC no longer supports fileset-based operations on distributed version
 120 control systems (DVCSs) such as Arch, Bazaar, Subversion, Mercurial,
 121 and Git.  For instance, multi-file commits will be performed by
 122 committing one file at a time.  As you go further back in time, we
 123 will remove DVCS support entirely, so start migrating your projects to
 124 CVS.
 125
 126 @item
 127 To keep up with decreasing computer memory capacity and disk space, many
 128 other functions and files have been eliminated in Emacs 22.3.
 129 @end itemize
 130
 131 @ignore
 132    arch-tag: 32932bd9-46f5-41b2-8a0e-fb0cc4caeb29
 133 @end ignore