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1 -*- mode:outline -*-
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2
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3 * Introduction
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4 ==============
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5
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6 This file presents some general information about XEmacs. It is
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7 primarily about the changes in recent XEmacs versions and its release
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8 history.
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9
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10 Use `C-c C-f' to move to the next equal level of outline, and
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11 `C-c C-b' to move to previous equal level. `C-h m' will give more
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12 info about the Outline mode. Many commands are also available through
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13 the menubar.
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14
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15 Users who would like to know which capabilities have been introduced
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16 in each release should look at the appropriate section of this file.
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17 Starting with version 20.0, XEmacs includes ChangeLogs, which can be
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18 consulted for a more detailed list of changes.
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19
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20 Users interested in some of the details of how XEmacs differs from GNU
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21 Emacs should read the section "What's Different?" near the end of this
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22 file.
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23
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225
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24 N.B. The term "GNU Emacs" refers to any release of Emacs Version
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25 19 from the Free Software Foundation's GNU Project. (We do not
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26 say just "Emacs" as Richard M. Stallman ["RMS"] prefers, because
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27 it is clearly a more generic term.) The term "XEmacs" refers to
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28 this program or to its predecessors "Era" and "Lucid Emacs". The
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29 predecessor of all these program is called "Emacs 18". When no
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30 particular version is implied, "Emacs" will be used.
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31
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32
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371
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33 * Changes in XEmacs 21.2
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34 ========================
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373
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35
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412
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36 ** `delete-key-deletes-forward' now defaults to t.
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37
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38 `delete-key-deletes-forward' is the variable that regulates the
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39 behaviour of the delete key on the systems that offer both a backspace
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40 and a delete key. If set to nil, the key labeled "Delete" will delete
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41 backward. If set to non-nil, the "Delete" key will delete forward,
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42 except on keyboards where a "Backspace" key is not provided.
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43
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44 Unless our implementation has bugs, the only reason why you would want
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45 to set `delete-key-deletes-forward' to nil is if you want to use the
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46 Delete key to delete backwards, despite the presence (according to
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47 Xlib) of a BackSpace key on the keyboard.
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422
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48
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398
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49 ** Interactive searching and matching case improvements.
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50
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51 Case sensitiveness in searching operations is normally controlled by
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52 the variable `case-fold-search' (if non-nil, case is ignored while
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53 searching). This mechanism has now been slightly improved for
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54 interactive searches: if the search string (or regexp) contains
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55 uppercase characters, the searching is forced to be case-sensitive,
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56 `case-fold-search'.
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57
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58 The new behavior affects all functions performing interactive
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59 searches, like `zap-to-char', `list-matching-lines', `tags-search'
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60 etc. The incremental search facility has always behaved that way.
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61
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424
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62 ** The rectangle functions have been almost completely rewritten in
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63 order to avoid inserting undesirable spaces, notably at the end of
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64 lines. Two typical examples of the old behavior were
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65 `string-rectangle', which filled all lines up to the right side of the
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66 rectangle, and `clear-rectangle', which filled even empty lines up to
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67 the left side. All functions have been rewritten to avoid inserting
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68 unwanted spaces, and an optional prefix now allows them to behave the
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69 old way.
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70
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71 As a side effect, the FORCE argument to `move-to-column' now
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72 understands the special value `coerce', which means that the line
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73 should not be filled if it is too short to reach the desired column.
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74
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75 ** Incremental search will now highlight all visible matches, making
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76 it easier to anticipate where consecutive C-s or C-r will place the
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77 point. If you want to disable the feature, set
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78 `isearch-highlight-all-matches' to nil.
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79
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80 ** You can now customize and save comments for faces and variables.
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81 In Custom buffers, a new menu entry allows you to add and edit a
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82 comment. Comments for variables can also be assigned by calling
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83 `customize-set-(value|variable)' with a prefix argument.
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84
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85 ** XEmacs now locates the early package hierarchies at
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86 ~/.xemacs/mule-packages/ and ~/.xemacs/xemacs-packages/. Previously,
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87 the early packages were located in ~/.xemacs/.
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88
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377
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89 ** You can now create "indirect buffers", like in GNU Emacs. An
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90 indirect buffer shares its text with another buffer ("base buffer"),
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91 but has its own major mode, local variables, extents, and narrowing.
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92 An indirect buffer has a name of its own, distinct from those of the
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93 base buffer and all other buffers. An indirect buffer cannot itself
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94 be visiting a file (though its base buffer can be). The base buffer
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95 cannot itself be indirect.
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96
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97 Use (make-indirect-buffer BASE-BUFFER NAME) to make an indirect buffer
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98 named NAME whose base is BASE-BUFFER. If BASE-BUFFER is itself an
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99 indirect buffer, its base buffer is used as the base for the new
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100 buffer.
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101
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102 You can make an indirect buffer current, or switch to it in a window,
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103 just as you would a non-indirect buffer.
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104
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398
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105 The function `buffer-base-buffer' returns a buffer's base buffer or
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106 nil, if given an ordinary (non-indirect) buffer. The function
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107 `buffer-indirect-children' returns a list of the indirect children of
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108 a base buffer.
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109
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110 ** User names following the tilde character can now be completed at
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111 file name prompts; e.g. `C-x C-f ~hni<TAB>' will complete to
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112 `~hniksic/'. To make this operation faster, a cache of user names is
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113 maintained internally.
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114
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414
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115 The new primitives available for this purpose are functions named
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116 `user-name-completion' and `user-name-all-completions'.
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117
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418
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118 ** Native widgets can be displayed in buffers.
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119
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120 The glyph system has been extended to allow the display of glyphs that
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121 are implemented as native window-system widgets. Thus you can embed
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122 buttons, scrollbars, combo boxes, edit fields and progress gauges in a
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123 buffer. As a side effect subwindow support now works once again.
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124
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125 This support is currently only available under MS-Windows.
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126
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424
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127 ** X-Face support is now available under MS-Windows.
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128 If an X-Face libary built under MS-Windows is available then XEmacs
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129 will use this at build time.
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130
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424
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131 ** The font-menu is now available under MS-Windows.
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132
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424
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133 ** MS-Windows support for selection is now much more robust.
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134
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135 Generally selection should now do what you would expect under
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136 MS-Windows: the middle mouse button will paste your current selection
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137 or the clipboard; conversions from different types of selection to the
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138 clipboard can be made; the kill-ring and friends will be updated as
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139 per X.
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140
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141 The only thing selection doesn't do is set the clipboard automatically
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142 as this would break the MS-Windows model. If you want this behaviour
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143 then set `selection-sets-clipboard' to t
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144
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424
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145 ** New command-line switches -user-init-file and -user-init-directory.
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146 These can be used to specify alternate locations for what is normally
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147 ~/.emacs and ~/.xemacs.
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148
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149 Moreover, -user <user> (which used to only work in unpredictable ways)
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150 is now equivalent to
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151 -user-init-file ~<user>/.emacs -user-init-directory ~<user>/.xemacs.
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152
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377
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153
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380
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154 * Lisp and internal changes in XEmacs 21.2
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155 ==========================================
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156
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398
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157 ** Much effort has been invested to make XEmacs Lisp faster:
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158
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159 *** Many basic lisp operations are now faster.
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380
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160 This is especially the case when running a Mule-enabled XEmacs.
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161
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162 A general overhaul of the lisp engine should produce a speedup of 1.4
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163 in a Latin-1 XEmacs, and 2.1 in a Mule XEmacs. These numbers were
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164 obtained running `(byte-compile "simple.el")', which should be a
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165 pretty typical test of "pure" Lisp.
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166
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398
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167 *** Lisp hash tables have been re-implemented. The Common Lisp style
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168 hash table interface has been made standard, and moved from cl.el into
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169 fast C code (See the section on hash tables in the XEmacs Lisp
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170 Reference). A speedup factor of 3 can be expected with code that
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171 makes intensive use of hash tables.
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380
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172
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398
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173 *** The garbage collector has been tuned, leading to a speedup of
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174 1.16.
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380
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175
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398
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176 *** The family of functions that iterate over lists, like `memq', and
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177 `rassq', have been made a little faster (typically 1.3).
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178
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398
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179 *** Lisp function calls are faster, by approximately a factor of two.
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180 However, defining inline functions (via defsubst) still makes sense
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181 for tight loops.
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182
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398
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183 *** Finally, a few functions have had dramatic performance
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184 improvements. For example, `(last long-list)' is now 30 times faster.
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185
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186 Of course, your mileage will vary.
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187
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188 Many operations do not see any improvement. Surprisingly, running
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189 (font-lock-fontify-buffer) does not use the Lisp engine much at all.
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190 Speeding up your favorite slow operation is an excellent project to
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191 improve XEmacs. Don't forget to profile!
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192
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193 ** XEmacs finally has an automated test suite!
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194 Although this is not yet very sophisticated, it is already responsible
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195 for several important bug fixes in XEmacs. To try it out, simply use
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196 the makefile target `make check' after building XEmacs.
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197
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398
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198 ** Hash tables have been reimplemented.
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199 As was pointed out above, the standard interface to hash tables is now
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200 the Common Lisp interface, as described in Common Lisp, the Language
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201 (CLtL2, by Steele). The older interface (functions with names
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202 containing the phrase `hashtable') will continue to work, but the
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203 preferred interface now has names containing the phrase `hash-table'.
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204
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205 Here's the executive overview: create hash tables using
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206 make-hash-table, and use gethash, puthash, remhash, maphash and
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207 clrhash to manipulate entries in the hash table. See the (updated)
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208 Lisp Reference Manual for details.
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209
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210 ** Lisp code handles circular lists much more robustly.
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211 Many basic lisp functions used to loop forever when given a circular
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212 list, expecting you to C-g (quit) out of the loop. Now this is more
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213 likely to trigger a `circular-list' error. Printing a circular list
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214 now results in something like this:
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380
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215
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398
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216 (let ((x (cons 'foo 'foo)))
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217 (setcdr x x)
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218 x)
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219 => (foo ... <circular list>)
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220
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221 An extra bonus is that checking for circularities is not just
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222 friendlier, but actually faster than checking for C-g.
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223
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412
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224 ** The new form `ignore-file-errors', similar to `ignore-errors' may
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225 be used as a short-hand for condition-case when you wish to ignore
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226 file-related error. For example:
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227
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228 (ignore-file-errors (delete-file "foo"))
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229
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412
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230 ** The arguments to `locate-file' are now much more "lispy". As
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231 before, the usage is:
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232
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233 (locate-file FILENAME PATH-LIST &optional SUFFIXES MODE)
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234
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235 Except that SUFFIXES are now a list of strings instead of a single,
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236 colon-separated string. MODE is now a symbol or a list of symbols
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237 (symbols `exists', `executable', `writable', and `readable' are
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238 supported) instead of an integer code. See the documentation for
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239 details.
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240
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412
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241 Of course, the old form is still accepted for backward compatibility.
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242
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414
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243 ** `translate-region' has been improved in several ways. Its TABLE
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244 argument used to be a 256-character string. In addition to this, it
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245 can now also be a vector or a char-table (which is useful for Mule.)
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246 If TABLE a vector or a generic char-table, you can map characters to
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247 strings instead of to other characters. For instance:
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248
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249 (let ((table (make-char-table 'generic)))
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250 (put-char-table ?a "the letter a" table)
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251 (put-char-table ?b "" table)
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252 (put-char-table ?c ?\n table)
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253 (translate-region (point-min) (point-max) table))
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254
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412
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255 ** The `keywordp' function now returns non-nil only on symbols
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256 interned in the global obarray. For example:
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257
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412
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258 (keywordp (intern ":foo" [0]))
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259 => nil
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260 (keywordp (intern ":foo")) ; The same as (keywordp :foo)
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261 => t
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262
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412
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263 This behaviour is compatible with other code which treats symbols
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264 beginning with colon as keywords only if they are interned in the
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265 global obarray. `keywordp' used to wrongly return t in both cases
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266 above.
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267
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268 ** The first argument to `intern-soft' may now also be a symbol, like
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269 with `unintern'. If given a symbol, `intern-soft' will look for that
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270 exact symbol rather than for any string. This is useful when you want
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271 to check whether a specific symbol is interned in an obarray, e.g.:
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272
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273 (intern "foo")
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274 (intern-soft "foo")
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275 => foo
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276 (intern-soft (make-symbol "foo"))
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277 => nil
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278
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412
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279 ** Functions for decoding base64 encoding are now available; see
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280 `base64-encode-region', `base64-encode-string', `base64-decode-region'
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281 and `base64-decode-string'.
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404
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282
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424
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283 ** user-init-directory is now an absolute, unexpanded path.
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284 Previously, `user-init-directory' used to be relative to
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285 (concat "~" init-file-user). This turned out to be too complicated
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286 for most packages (and some core Lisp files) to use correctly.
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287
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288 Also, `init-file-user' has been obsoleted in the process.
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289
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373
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290
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274
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291 * Changes in XEmacs 21.0
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209
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292 ========================
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293
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219
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294 ** XEmacs has been unbundled into constituent installable packages.
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298
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295 See the Info documentation under "Packages" for more information.
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296 See the file `etc/PACKAGES' in the distribution for a partial list of
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297 packages available at the time of the 21.0 release.
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219
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298
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290
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299 ** XEmacs is now supported under Microsoft Windows 95/98 and Windows
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300 NT operating systems. For starters, look at the XEmacs on Windows FAQ
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294
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301 at <URL:http://jagor.srce.hr/~hniksic/xemacs-on-windows-faq.txt>. To
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290
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302 discuss Windows-specific issues, subscribe to the mailing list at
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303 <xemacs-nt-request@xemacs.org>.
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304
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305 ** XEmacs will now use `XEmacs' as its application class if it finds
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306 any `XEmacs' resources in the resource database. Otherwise, it will
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307 continue to use the `Emacs' class.
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308
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294
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309 ** The options menu has been ported to Custom.
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310 This means that each entry in the options menu acts as if you had customized
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311 the corresponding variable by hand. ### WARNING: there is currently no
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312 upgrading function to help you port your old options settings to the new
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313 format. Consequently, if you want to modify the options for XEmacs 21, you
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314 will have to set them all again through the menu, and remove the code loading
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315 .xemacs-options from your .emacs.
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316
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278
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317 ** When the Zmacs region is active, `M-x query-replace' and the other
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318 replace commands now operate on the region contents only.
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319
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398
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320 ** XEmacs now is able to choose X visuals and use private colormaps.
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321 The '-visual <visualStr>' command line option or the '.EmacsVisual'
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322 Xresource controls which visual XEmacs will use, and
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323 '-privateColormap' or '.privateColormap' will force XEmacs to create a
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324 private colormap for use. The syntax for the visual string is
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325 "<visual><bitdepth>" where <visual> is one of 'StaticColor',
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326 'TrueColor', 'GrayScale', 'PseudoColor' or 'DirectColor' and
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327 <bitdepth> is the appropriate number of bits per pixel. If an invalid
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328 or non-supported combination is entered, XEmacs attempts to find a happy
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329 medium. The X creation mechanism will then determine if it needs to
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330 create a colormap for use, or the presence of the private flags will
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331 force it to create it.
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223
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332
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284
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333 ** The `imenu' package has been ported to XEmacs and is available as a
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334 package.
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335
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219
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336 ** `echo-keystrokes' can now be a floating-point number, so that you
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276
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337 can set it to intervals shorter than one second.
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219
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338
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339 (setq echo-keystrokes 0.1)
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340
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280
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341 ** The new command `center-to-window-line' works like `recenter'
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342 (bound to `C-l'), only it does not redisplay the whole display area.
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343
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284
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344 ** The M-. command will now first search through exact tags matches,
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219
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345 and then through inexact matches, as one would expect.
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346
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223
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347 ** The new variable `user-full-name' can be used to customize one's
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348 name when using the Emacs mail and news reading facilities.
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349
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380
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350 Normally, `user-full-name' is a function that returns the full name of
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223
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351 a user or UID, as specified by the system -- for instance,
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380
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352 (user-full-name "root") returns something like "Super-User". However,
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223
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353 when the function is called without arguments, it will return the
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380
|
354 value of the `user-full-name' variable. The `user-full-name' variable
|
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223
|
355 is initialized using the environment variable NAME and (failing that)
|
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356 the user's system name.
|
|
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357
|
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380
|
358 The behavior of the `user-full-name' function with an argument
|
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225
|
359 specified is unchanged.
|
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223
|
360
|
|
|
361 ** The new command `M-x customize-changed-options' lets you customize
|
|
|
362 all the options whose default values have changed in recent Emacs
|
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363 versions. You specify a previous Emacs version number as argument,
|
|
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364 and the command creates a customization buffer showing all the
|
|
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365 customizable options whose default values were changed since that
|
|
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366 version.
|
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367
|
|
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368 If you don't specify a particular version number argument, then the
|
|
|
369 customization buffer shows all the customizable options for which
|
|
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370 Emacs versions of changes are recorded.
|
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371
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249
|
372 ** The new command `add-log-convert' can be used to convert the
|
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373 old-style (pre-20.3) ChangeLog buffers to new style, for
|
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374 consistency. A reminder: if you wish to revert to old-style
|
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375 ChangeLogs instead, customize the value of `add-log-time-format'
|
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376 variable.
|
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|
377
|
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284
|
378 ** The new command `zap-up-to-char' is now available. It is similar
|
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379 to `zap-to-char', except that it does not delete the searched-for
|
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|
380 character. It is not bound to a key by default.
|
|
|
381
|
|
|
382 ** You can now store a number into a register with `C-u NUMBER C-x r n'
|
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383 REG, increment it by INC with `C-u INC C-x r + REG' (to increment by
|
|
|
384 one, omit C-u INC), and insert it in the buffer with `C-x r g REG'.
|
|
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385 This is useful for writing keyboard macros.
|
|
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386
|
|
|
387 ** The M-: command, when given a prefix argument, will now insert its
|
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|
388 result to the current buffer.
|
|
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389
|
|
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390 ** The `C-h c' command, when given a prefix argument, will now insert
|
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391 the message into the current buffer.
|
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392
|
|
298
|
393 ** Horizontally split windows may now be dragged using the mouse.
|
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|
394 Because of this, the dividers between vertical windows are always
|
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395 visible. To turn it off, set `vertical-divider-always-visible-p' to
|
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396 nil.
|
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286
|
397
|
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223
|
398 ** XEmacs/Mule (internationalization) changes.
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399
|
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284
|
400 *** Mule support now works on TTY's. Use `set-terminal-coding-system'
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|
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401 and `set-keyboard-coding-system' to specify the coding system of your
|
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402 display and keyboard.
|
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274
|
403
|
|
225
|
404 *** Egg/SJ3 input method is now officially supported. Quail and
|
|
|
405 Egg/Skk have been available through the generalized Leim since 20.3.
|
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223
|
406
|
|
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407 *** Localized Japanese menubars are available if XEmacs is built with
|
|
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408 XFONTSET and either the X11 libraries are built with X_LOCALE defined
|
|
|
409 or the native C libraries support Japanese localization. This has
|
|
|
410 been available since 20.3, only it hasn't been announced before.
|
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219
|
411
|
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290
|
412 ** Jamie Zawinski's `gdb-highlight' extension is now distributed with
|
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284
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413 the `debug' package. gdb-highlight makes most objects printed in a
|
|
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414 gdb buffer be mouse-sensitive: as text shows up in the buffer, it is
|
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415 parsed, and objects which are recognized have context-sensitive
|
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416 commands attached to them. To use it, add the following to `.emacs':
|
|
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417
|
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286
|
418 (add-hook 'gdb-mode-hook (lambda () (require 'gdb-highlight)))
|
|
284
|
419
|
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290
|
420 ** The package popper.el is now included in the edit-utils package.
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|
421 It has been greatly enhanced with respect to the one once included
|
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422 with the ilisp package and should work well under XEmacs 21.0.
|
|
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423
|
|
396
|
424 ** Gnuserv changes
|
|
|
425
|
|
|
426 *** Like the old 'gnudoit' program. Gnuclient -batch now can read from stdin.
|
|
|
427
|
|
398
|
428 *** Gnuclient -batch no longer breaks off the output at the first LF.
|
|
396
|
429
|
|
278
|
430 ** C mode changes
|
|
|
431
|
|
|
432 *** Multiline macros are now handled, both as they affect indentation,
|
|
|
433 and as recognized syntax. New syntactic symbol cpp-macro-cont is
|
|
|
434 assigned to second and subsequent lines of a multiline macro
|
|
|
435 definition.
|
|
|
436
|
|
|
437 *** A new style "user" which captures all non-hook-ified
|
|
|
438 (i.e. top-level) .emacs file variable setings and customizations.
|
|
|
439 Style "cc-mode" is an alias for "user" and is deprecated. "gnu" style
|
|
|
440 is still the default however.
|
|
|
441
|
|
|
442 *** "java" style now conforms to Sun's JDK coding style.
|
|
|
443
|
|
|
444 *** There are new commands c-beginning-of-defun, c-end-of-defun which
|
|
|
445 are alternatives which you could bind to C-M-a and C-M-e if you prefer
|
|
|
446 them. They do not have key bindings by default.
|
|
|
447
|
|
|
448 *** New and improved implementations of M-a (c-beginning-of-statement)
|
|
|
449 and M-e (c-end-of-statement).
|
|
|
450
|
|
|
451 *** C++ namespace blocks are supported, with new syntactic symbols
|
|
|
452 namespace-open, namespace-close, and innamespace.
|
|
|
453
|
|
|
454 *** File local variable settings of c-file-style and c-file-offsets
|
|
|
455 makes the style variables local to that buffer only.
|
|
|
456
|
|
|
457 *** New indentation functions c-lineup-close-paren,
|
|
|
458 c-indent-one-line-block, c-lineup-dont-change.
|
|
|
459
|
|
|
460 *** Improvements (hopefully!) to the way CC Mode is loaded. You
|
|
|
461 should now be able to do a (require 'cc-mode) to get the entire
|
|
|
462 package loaded properly for customization in your .emacs file. A new
|
|
|
463 variable c-initialize-on-load controls this and is t by default.
|
|
|
464
|
|
251
|
465 ** In Text mode, now only blank lines separate paragraphs.
|
|
|
466 This makes it possible to get the full benefit of Adaptive Fill mode
|
|
|
467 in Text mode, and other modes derived from it (such as Mail mode).
|
|
278
|
468 TAB in Text mode now runs the command indent-relative; this makes a
|
|
|
469 practical difference only when you use indented paragraphs.
|
|
251
|
470
|
|
|
471 As a result, the old Indented Text mode is now identical to Text mode,
|
|
|
472 and is an alias for it.
|
|
|
473
|
|
|
474 If you want spaces at the beginning of a line to start a paragraph,
|
|
|
475 use the new mode, Paragraph Indent Text mode.
|
|
|
476
|
|
298
|
477 ** Changes to Gnus, the XEmacs newsreader.
|
|
|
478
|
|
|
479 *** New functionality for using Gnus as an offline newsreader has been
|
|
|
480 added. A plethora of new commands and modes have been added. See the
|
|
|
481 Gnus manual for the full story.
|
|
|
482
|
|
|
483 *** The nndraft backend has returned, but works differently than
|
|
|
484 before. All Message buffers are now also articles in the nndraft
|
|
|
485 group, which is created automatically.
|
|
|
486
|
|
|
487 *** `gnus-alter-header-function' can now be used to alter header
|
|
|
488 values.
|
|
|
489
|
|
|
490 *** `gnus-summary-goto-article' now accept Message-ID's.
|
|
|
491
|
|
|
492 *** A new Message command for deleting text in the body of a message
|
|
|
493 outside the region: `C-c C-v'.
|
|
|
494
|
|
|
495 *** You can now post to component group in nnvirtual groups with
|
|
|
496 `C-u C-c C-c'.
|
|
|
497
|
|
|
498 *** `nntp-rlogin-program' -- new variable to ease customization.
|
|
|
499
|
|
|
500 *** `C-u C-c C-c' in `gnus-article-edit-mode' will now inhibit
|
|
|
501 re-highlighting of the article buffer.
|
|
|
502
|
|
|
503 *** New element in `gnus-boring-article-headers' -- `long-to'.
|
|
|
504
|
|
|
505 *** `M-i' symbolic prefix command. See the section "Symbolic
|
|
|
506 Prefixes" in the Gnus manual for details.
|
|
|
507
|
|
|
508 *** `L' and `I' in the summary buffer now take the symbolic prefix
|
|
|
509 `a' to add the score rule to the "all.SCORE" file.
|
|
|
510
|
|
|
511 *** `gnus-simplify-subject-functions' variable to allow greater
|
|
|
512 control over simplification.
|
|
|
513
|
|
|
514 *** `A T' -- new command for fetching the current thread.
|
|
|
515
|
|
|
516 *** `/ T' -- new command for including the current thread in the
|
|
|
517 limit.
|
|
|
518
|
|
|
519 *** `M-RET' is a new Message command for breaking cited text.
|
|
|
520
|
|
|
521 *** \\1-expressions are now valid in `nnmail-split-methods'.
|
|
|
522
|
|
380
|
523 *** The `custom-face-lookup' function has been removed.
|
|
298
|
524 If you used this function in your initialization files, you must
|
|
|
525 rewrite them to use `face-spec-set' instead.
|
|
|
526
|
|
|
527 *** Cancelling now uses the current select method. Symbolic prefix
|
|
|
528 `a' forces normal posting method.
|
|
|
529
|
|
|
530 *** New command to translate M******** sm*rtq**t*s into proper text
|
|
|
531 -- `W d'.
|
|
|
532
|
|
|
533 *** For easier debugging of nntp, you can set `nntp-record-commands'
|
|
|
534 to a non-nil value.
|
|
|
535
|
|
|
536 *** nntp now uses ~/.authinfo, a .netrc-like file, for controlling
|
|
|
537 where and how to send AUTHINFO to NNTP servers.
|
|
|
538
|
|
|
539 *** A command for editing group parameters from the summary buffer
|
|
|
540 has been added.
|
|
|
541
|
|
|
542 *** A history of where mails have been split is available.
|
|
|
543
|
|
|
544 *** A new article date command has been added -- `article-date-iso8601'.
|
|
|
545
|
|
|
546 *** Subjects can be simplified when threading by setting
|
|
|
547 `gnus-score-thread-simplify'.
|
|
|
548
|
|
|
549 *** A new function for citing in Message has been added --
|
|
|
550 `message-cite-original-without-signature'.
|
|
|
551
|
|
|
552 *** `article-strip-all-blank-lines' -- new article command.
|
|
|
553
|
|
|
554 *** A new Message command to kill to the end of the article has
|
|
|
555 been added.
|
|
|
556
|
|
|
557 *** A minimum adaptive score can be specified by using the
|
|
|
558 `gnus-adaptive-word-minimum' variable.
|
|
|
559
|
|
|
560 *** The "lapsed date" article header can be kept continually
|
|
|
561 updated by the `gnus-start-date-timer' command.
|
|
|
562
|
|
|
563 *** Web listserv archives can be read with the nnlistserv backend.
|
|
|
564
|
|
|
565 *** Old dejanews archives can now be read by nnweb.
|
|
|
566
|
|
|
567 *** Byte-compilation of user-specs now works under XEmacs.
|
|
|
568
|
|
290
|
569 ** The `dir' files are no longer essential for functioning of the Info
|
|
|
570 subsystem. If the `dir' file does not exist in an Info directory, the
|
|
|
571 relevant information will be generated on-the-fly.
|
|
278
|
572
|
|
380
|
573 This behavior can be customized, look for `Info-auto-generate-directory'
|
|
292
|
574 and `Info-save-auto-generated-dir' in the `info' customization group.
|
|
278
|
575
|
|
219
|
576
|
|
274
|
577 * Lisp and internal changes in XEmacs 21.0
|
|
219
|
578 ==========================================
|
|
|
579
|
|
274
|
580 ** It is now possible to build XEmacs with support for 31-bit Lisp
|
|
|
581 integers (normally, Lisp integers are only 28 bits wide on 32-bit
|
|
|
582 machines.) Configure with --use-minimal-tagbits to test. With this
|
|
284
|
583 change, the maximum buffer size on 32-bit machines is increased from
|
|
|
584 128M to 1G. This setting will be made default in a future XEmacs
|
|
|
585 version.
|
|
|
586
|
|
286
|
587 ** Specifier changes.
|
|
|
588
|
|
|
589 *** When instantiating a specifier, the window locale now has a higher
|
|
|
590 precedence than the buffer locale. This is because the window locale
|
|
|
591 is more specific than the buffer locale.
|
|
|
592
|
|
290
|
593 *** The new macro `let-specifier' can be used to temporarily add
|
|
|
594 specifications to specifiers. See the documentation for details.
|
|
|
595
|
|
286
|
596 *** The new specifiers `vertical-scrollbar-visible-p' and
|
|
|
597 `horizontal-scrollbar-visible-p' may be used to control scrollbar
|
|
290
|
598 visibility. Previously, the only way to remove a scrollbar was to set
|
|
|
599 its size to 0. This method is still supported for backward
|
|
|
600 compatibility.
|
|
286
|
601
|
|
|
602 *** The new specifiers `scrollbar-on-left-p' and `scrollbar-on-top-p'
|
|
|
603 may be used to control the position of the vertical and horizontal
|
|
|
604 toolbar. Previously, their position could be changed only through the
|
|
|
605 use of X resources.
|
|
|
606
|
|
|
607 *** The new draggable vertical dividers between windows may be turned
|
|
298
|
608 off using the `vertical-divider-always-visible-p' specifier. When
|
|
|
609 this is set to nil, the vertical dividers between windows are shown
|
|
|
610 only when needed, and they are not draggable.
|
|
286
|
611
|
|
|
612 Other properties of the vertical dividers may be controlled using
|
|
380
|
613 `vertical-divider-shadow-thickness', `vertical-divider-line-width' and
|
|
286
|
614 `vertical-divider-spacing' specifiers, which see.
|
|
|
615
|
|
284
|
616 ** Frame focus management changes.
|
|
|
617
|
|
|
618 *** When the variable focus-follows-mouse is non-nil, `select-frame'
|
|
|
619 no longer permanently selects a different frame. The frame selection
|
|
|
620 is temporary and is reverted when the current command terminates, much
|
|
|
621 like the buffer selected by `set-buffer'. This is the same as in FSF
|
|
|
622 Emacs.
|
|
|
623
|
|
|
624 *** The new function `focus-frame' sets the window system focus to
|
|
|
625 FRAME (and selects it), regardless of the value of
|
|
|
626 `focus-follows-mouse'. Doing this is not well behaved, so be
|
|
|
627 absolutely sure that you want this.
|
|
|
628
|
|
|
629 The code that uses `select-frame' only to get the window manager focus
|
|
|
630 should be changed to use `set-frame-focus' instead, so that they keep
|
|
|
631 working when `focus-follows-mouse' is non-nil.
|
|
|
632
|
|
|
633 *** The special forms `save-selected-frame' and `with-selected-frame'
|
|
|
634 can now be used to temporarily change selected frame.
|
|
|
635
|
|
|
636 *** The behavior of `other-frame' command (`C-x 5 o') is unaffected by
|
|
|
637 these changes.
|
|
280
|
638
|
|
290
|
639 ** The function `select-window' now has an optional second argument
|
|
|
640 NORECORD which if non-nil inhibits the recording of a buffer change.
|
|
|
641
|
|
|
642 ** The function `vertical-motion' now correctly handles the second,
|
|
|
643 optional WINDOW argument. A new third argument PIXELS, if non-nil,
|
|
|
644 indicates that the returned motion should be in pixels.
|
|
|
645
|
|
|
646 ** The new function `vertical-motion-pixels' is similar to
|
|
|
647 vertical-motion but takes as input a vertical motion in pixels.
|
|
|
648
|
|
|
649 ** The new functions window-text-area-pixel-{width,height,edges} can
|
|
|
650 be used to obtain information about the text-displaying area of a
|
|
|
651 window.
|
|
|
652
|
|
|
653 ** The new functions `shrink-window-pixels' and `enlarge-window-pixels'
|
|
|
654 can be used to adjust the size of a window by a pixel amount.
|
|
|
655
|
|
|
656 ** The new function `window-displayed-text-pixel-height' can be used
|
|
|
657 to determine the height of the text actually displayed in a window.
|
|
|
658
|
|
284
|
659 ** The arithmetic comparison functions <, >, =, /= now accept a
|
|
|
660 variable number of arguments.
|
|
280
|
661
|
|
|
662 This means that if you want to test whether A < B < C, you can write
|
|
|
663 it as (< A B C) instead of (and (< A B) (< B C)). Likewise,
|
|
371
|
664 (apply #'> LIST) now tests if LIST is monotonously increasing -- and
|
|
280
|
665 so on.
|
|
|
666
|
|
223
|
667 ** The XEmacs hashtables now have a consistent read/print syntax.
|
|
|
668 This means that a hashtable will be readably printed in a
|
|
|
669 structure-like form:
|
|
|
670
|
|
|
671 #s(hashtable size 2 data (key1 value1 key2 value2))
|
|
|
672
|
|
|
673 When XEmacs reads this form, it will create a new hashtable according
|
|
|
674 to description. This allows you to easily dump hashtables to files
|
|
|
675 using `prin1', and read them back in using `read'.
|
|
|
676
|
|
|
677 If `print-readably' is non-nil, a more relaxed syntax is used; for
|
|
|
678 instance:
|
|
|
679
|
|
|
680 #<hashtable size 2/13 data (key1 value1 key2 value2) 0x874d>
|
|
|
681
|
|
286
|
682 ** It is now possible to build XEmacs with LDAP support.
|
|
|
683 You will need to install a LDAP library first. The following have
|
|
|
684 been tested:
|
|
380
|
685 - LDAP 3.3 from the University of Michigan
|
|
286
|
686 (get it from <URL:http://www.umich.edu/~dirsvcs/ldap/>)
|
|
384
|
687 - OpenLDAP 1.0.3 from the OpenLDAP Foundation
|
|
|
688 (get it from <URL:http://www.openldap.org/>)
|
|
286
|
689 - LDAP SDK 1.0 from Netscape Corp.
|
|
|
690 (get it from <URL:http://developer.netscape.com/>)
|
|
284
|
691
|
|
241
|
692 ** When profiling is in effect, a call-count of all recorded functions
|
|
|
693 is now calculated. This information is stored in
|
|
|
694 `call-count-profile-table', and is utilized by `profile-results' as
|
|
286
|
695 well as the new command `profile-call-count-results'.
|
|
241
|
696
|
|
284
|
697 ** It is now an error to change the value of a symbol whose name
|
|
|
698 starts with a colon, if it is interned in the standard obarray.
|
|
|
699
|
|
|
700 However, setting such a symbol to its proper value, which is that
|
|
|
701 symbol itself, is not an error. This is for the sake of programs that
|
|
|
702 support pre-19.12 XEmacs and pre-20 GNU Emacs by explicitly setting
|
|
|
703 these variables to themselves.
|
|
|
704
|
|
|
705 ** The `concat' function no longer accepts integer arguments.
|
|
|
706
|
|
278
|
707 ** The new function `string' concatenates all its argument characters
|
|
|
708 and returns the resulting string. This is consistent with other
|
|
|
709 functions, like `list', `vector', etc.
|
|
|
710
|
|
290
|
711 ** The function `temp-directory' is now available to return the
|
|
|
712 directory to store temporary files. On Unix this will be obtained
|
|
|
713 from TMPDIR, defaulting to `/tmp'.
|
|
|
714
|
|
284
|
715 ** The function load-average now accepts an optional argument
|
|
|
716 USE-FLOATS. If it is non-nil, the load average values are returned as
|
|
|
717 floating point numbers, rather than as integers to be divided by 100.
|
|
278
|
718
|
|
223
|
719 ** The `make-event' function now supports the TYPE and PLIST
|
|
276
|
720 arguments, which can be used to create various events from Lisp. See
|
|
|
721 the documentation for details.
|
|
223
|
722
|
|
219
|
723 ** `function-interactive' is a new function that returns the
|
|
|
724 interactive specification of a funcallable object.
|
|
|
725
|
|
|
726 ** The new `lmessage' function allows printing of a formatted message
|
|
|
727 with a particular label.
|
|
|
728
|
|
223
|
729 (lmessage 'progress "Processing... %d" counter)
|
|
219
|
730
|
|
|
731 This function is more convenient than `display-message' because it
|
|
|
732 automatically applies `format' to its arguments.
|
|
|
733
|
|
|
734 ** The new `lwarn' function, analogous to `lmessage', allows printing
|
|
|
735 a formatted warning, with a non-default CLASS or LABEL.
|
|
|
736
|
|
284
|
737 ** The new function `split-path' can now be used to explode the
|
|
|
738 components of a colon-separated search path into a list.
|
|
|
739
|
|
|
740 (split-path "foo:bar")
|
|
|
741 => ("foo" "bar")
|
|
|
742
|
|
274
|
743 ** Specifiers and symbols whose value is a specifier are now allowed
|
|
276
|
744 as modeline specifications.
|
|
274
|
745
|
|
|
746 ** defcustom now accepts the keyword `:version'. Use this to specify
|
|
|
747 in which version of Emacs a certain variable's default value changed.
|
|
|
748 For example,
|
|
|
749
|
|
|
750 (defcustom foo-max 34 "*Maximum number of foo's allowed."
|
|
|
751 :type 'integer
|
|
|
752 :group 'foo
|
|
276
|
753 :version "21.0")
|
|
274
|
754
|
|
|
755 This information is used to control the customize-changed-options
|
|
|
756 command.
|
|
|
757
|
|
225
|
758 ** The line number tracking in modeline is now efficient, even for
|
|
|
759 very large buffers. This is achieved by caching the line numbers of
|
|
|
760 recent buffer positions, and reusing them. This cache is used only in
|
|
|
761 the buffers where `line-number-mode' is in effect.
|
|
259
|
762
|
|
274
|
763 ** When the new GNU Malloc aka Doug Lea Malloc is available, it will
|
|
|
764 be used. This should result in better performance on Linux systems
|
|
|
765 with libc6.
|
|
|
766
|
|
276
|
767 ** The code XEmacs uses to assemble its various paths into the
|
|
|
768 directory hierarchy has been rewritten to support the package system.
|
|
298
|
769 Look under "Startup Paths" in the Info documentation for more
|
|
|
770 information.
|
|
276
|
771
|
|
424
|
772 *** site-lisp is no longer part of the load-path by default.
|
|
276
|
773 Its use is deprecated, but you can specify --with-site-lisp=yes at the
|
|
|
774 configure command line to get it back.
|
|
|
775
|
|
|
776 *** `Info-default-directory-list' is now obsolete. If you want to
|
|
|
777 change the path which XEmacs uses to search for info files, set
|
|
|
778 `Info-directory-list' instead.
|
