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428
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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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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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33 * Changes in XEmacs 21.2
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34 ========================
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35
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454
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36 ** The modeline's text is now scrollable. Please refer to the variable
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37 `modeline-scrolling-method' for more information.
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38
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440
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39 ** The delete key now deletes forward by default.
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40
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41 This is regulated by the variable `delete-key-deletes-forward', which
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42 now defaults to t. `delete-key-deletes-forward' takes effect only on
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43 the systems that offer both a backspace and a delete key. If set to
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44 nil, the key labeled "Delete" will always delete backward. If set to
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45 non-nil, the "Delete" key will delete forward, except on keyboards
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46 where a "Backspace" key is not provided (e.g. old DEC keyboards.)
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47
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48 Unless our implementation has bugs, the only reason why you would want
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49 to set `delete-key-deletes-forward' to nil is if you want to use the
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50 Delete key to delete backwards, despite the presence (according to
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51 Xlib) of a BackSpace key on the keyboard.
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52
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442
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53 ** Shifted motion keys now select text by default. You can turn this
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54 off by setting `shifted-motion-keys-select-region' to nil.
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55
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56 ** You can now set the variable `kill-whole-line' to `always', which
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57 makes `kill-line' (C-k) delete the entire line always, not just when
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58 the cursor is at the beginning of the line. This behavior, as well as
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59 the existing kill-whole-line behavior, now only take effect when
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60 kill-line is called interactively, although this is a departure from a
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61 previous behavior in the case of setting this variable kill-whole-line
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62 to t. It is almost certainly what has always been intended, and most
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63 likely the old way of doing things introduced bugs.
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64
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65 The new function `historical-kill-line' ignores the `kill-whole-line'
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66 setting and always gives the historical behavior of only killing to
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67 the end of the line. This function is bound to Sh-C-k, so that the
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68 kill to end of line behavior is available, even when `kill-whole-line'
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69 has been customized.
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70
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71 ** XEmacs menus now have accelerators by default. If a menu item does
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72 not have an accelerator specified, one is created dynamically, using
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73 numbers 1-9 and letters.
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74
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428
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75 ** Interactive searching and matching case improvements.
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76
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77 Case sensitiveness in searching operations is normally controlled by
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78 the variable `case-fold-search' (if non-nil, case is ignored while
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79 searching). This mechanism has now been slightly improved for
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80 interactive searches: if the search string (or regexp) contains
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81 uppercase characters, the searching is forced to be case-sensitive,
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82 `case-fold-search'.
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83
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84 The new behavior affects all functions performing interactive
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85 searches, like `zap-to-char', `list-matching-lines', `tags-search'
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86 etc. The incremental search facility has always behaved that way.
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87
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440
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88 ** Incremental search will now highlight all visible matches, making
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89 it easier to anticipate where consecutive C-s or C-r will place the
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90 point. If you want to disable the feature, set
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91 `isearch-highlight-all-matches' to nil.
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92
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93 ** You can now use the buffer tabs to switch between buffers. The
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94 tabs are located between the toolbar and the uppermost window, in a
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95 location called "gutter". If you dislike the buffer tabs, you can
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442
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96 disable them by customizing `gutter-buffers-tab-visible-p', or by
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97 placing this in your .emacs:
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98
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442
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99 (set-gutter-element-visible-p default-gutter-visible-p 'buffers-tab nil)
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100
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442
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101 You can change the location of the gutter with
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102 `set-default-gutter-position', however currently only MS-Windows
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442
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103 supports tab widgets with orientations other than vertical.
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104
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105 ** Kill and yank now interact with the clipboard by default under
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106 Windows. This was done by changing the default value of
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107 `interprogram-cut-function' and `interprogram-paste-function'. You
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108 can get the old behavior by setting these to nil, and there is an
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109 option on the options menu to do this.
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440
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110
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111 ** When you press RET at a minibuffer prompt that provides a default
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112 value, the value is stored in history instead of an empty line. Also,
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113 you can now edit the default value by pressing the down arrow,
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114 accessing the logical "future" value. Not all minibuffer prompts have
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115 yet been converted to support this feature.
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116
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428
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117 ** The rectangle functions have been almost completely rewritten in
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118 order to avoid inserting undesirable spaces, notably at the end of
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119 lines. Two typical examples of the old behavior were
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120 `string-rectangle', which filled all lines up to the right side of the
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121 rectangle, and `clear-rectangle', which filled even empty lines up to
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122 the left side. All functions have been rewritten to avoid inserting
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123 unwanted spaces, and an optional prefix now allows them to behave the
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124 old way.
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125
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442
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126 Also, the behavior of `string-rectangle' is now compliant with
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127 `pending-delete-mode': if this mode is active, then the string
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128 replaces the region rectangle. Otherwise, the command does not delete
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129 or overwrite any existing text. For those who want that feature but do
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130 not use pending-delete-mode, a new function, `replace-rectangle', is
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131 available.
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132
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428
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133 As a side effect, the FORCE argument to `move-to-column' now
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134 understands the special value `coerce', which means that the line
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135 should not be filled if it is too short to reach the desired column.
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136
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440
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137 ** Customize now supports adding comments about your face and variable
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138 settings using a new menu entry. Comments for variables can also be
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139 assigned by calling `customize-set-(value|variable)' with a prefix
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140 argument.
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428
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141
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142 ** XEmacs now locates the early package hierarchies at
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143 ~/.xemacs/mule-packages/ and ~/.xemacs/xemacs-packages/. Previously,
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144 the early packages were located in ~/.xemacs/.
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145
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146 ** You can now create "indirect buffers", like in GNU Emacs. An
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147 indirect buffer shares its text with another buffer ("base buffer"),
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148 but has its own major mode, local variables, extents, and narrowing.
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149 An indirect buffer has a name of its own, distinct from those of the
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150 base buffer and all other buffers. An indirect buffer cannot itself
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151 be visiting a file (though its base buffer can be). The base buffer
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152 cannot itself be indirect.
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153
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154 Use (make-indirect-buffer BASE-BUFFER NAME) to make an indirect buffer
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155 named NAME whose base is BASE-BUFFER. If BASE-BUFFER is itself an
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156 indirect buffer, its base buffer is used as the base for the new
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157 buffer.
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158
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159 You can make an indirect buffer current, or switch to it in a window,
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160 just as you would a non-indirect buffer.
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161
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162 The function `buffer-base-buffer' returns a buffer's base buffer or
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163 nil, if given an ordinary (non-indirect) buffer. The function
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164 `buffer-indirect-children' returns a list of the indirect children of
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165 a base buffer.
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166
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167 ** User names following the tilde character can now be completed at
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168 file name prompts; e.g. `C-x C-f ~hni<TAB>' will complete to
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169 `~hniksic/'. To make this operation faster, a cache of user names is
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170 maintained internally.
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171
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172 The new primitives available for this purpose are functions named
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173 `user-name-completion' and `user-name-all-completions'.
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174
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175 ** XEmacs can now play sound using Enlightenment Sound Daemon (ESD).
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176 It will try NAS first, then ESD, then playing native sound directly.
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177
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178 ** X-Face support is now available under MS-Windows.
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179 If an X-Face libary built under MS-Windows is available then XEmacs
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180 will use this at build time.
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181
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182 ** The font-menu is now available under MS-Windows.
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183
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184 ** MS-Windows support for selection is now much more robust.
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185
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186 Generally selection should now do what you would expect under
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187 MS-Windows: the middle mouse button will paste your current selection
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188 or the clipboard; conversions from different types of selection to the
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189 clipboard can be made; the kill-ring and friends will be updated as
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190 per X.
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191
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192 The only thing selection doesn't do is set the clipboard automatically
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442
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193 as this would break the MS-Windows model. If you want this behavior
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194 then set `selection-sets-clipboard' to t.
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428
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195
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438
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196 ** Mail spool locking now works correctly.
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197 XEmacs has always come with a little auxiliary program, movemail,
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198 which moves mail out of the system's spool area into user storage. To
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199 coordinate between XEmacs, the mail delivery agent, and other mail
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200 user agents, movemail needs to properly lock the spool file before
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201 moving it. Movemail now correctly respects the --mail-locking option
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202 to configure. Moreover, movemail's locking behavior can be specified
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203 at run-time, via a new command-line option -m to movemail, or through
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204 the environment variable EMACSLOCKMETHOD.
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205
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206 When installing XEmacs, make sure you configure it according to your
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207 environment's mail spool locking conventions. When you're using a
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208 binary kit, set the `mail-lock-method' variable at startup, or the
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209 EMACSLOCKMETHOD environment variable.
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210
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442
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211 ** Init file will move to ~/.xemacs/init.el.
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212
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213 If `~/.xemacs/init.el' exists, XEmacs will prefer it over `~/.emacs'
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214 as an init file. The file may be byte-compiled as
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215 `~/.xemacs/init.elc'.
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216
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217 Future versions of XEmacs will stop supporting `~/.emacs' as an init
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218 file. XEmacs offers automatic migration upon startup.
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219
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220 ** Custom file will move to ~/.xemacs/custom.el.
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221
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222 Whereas customize settings were formerly stored in the regular init
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223 file, XEmacs now prefers them to be in a separate file
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224 `~/.xemacs/custom.el', completely under automatic control. This
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225 change goes with the migration of the init file, and XEmacs offers
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226 automatic migration upon startup.
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227
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228 ** Init file may be called .emacs.el.
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229
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230 For the time being, like in GNU Emacs 20.4 and on, you can now name
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231 the XEmacs init file `.emacs.el'. Formerly the name had to be
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232 `.emacs'. If you use the name `.emacs.el', you can byte-compile the
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233 file in the usual way.
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234
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235 If both `.emacs' and `.emacs.el' exist, the latter file is the one
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236 that is used.
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237
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428
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238 ** New command-line switches -user-init-file and -user-init-directory.
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239 These can be used to specify alternate locations for what is normally
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240 ~/.emacs and ~/.xemacs.
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241
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242 Moreover, -user <user> (which used to only work in unpredictable ways)
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442
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243 is now equivalent to -user-init-file ~<user>/.xemacs/init.el
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244 -user-init-directory ~<user>/.xemacs. or -user-init-file
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245 ~<user>/.emacs -user-init-directory ~<user>/.xemacs, whichever init
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246 file comes first.
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428
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247
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438
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248 ** New variable `mswindows-meta-activates-menu'.
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442
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249 If you set this variable to nil then pressing and releasing the Alt
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250 key under MS-Windows will no longer activate the menubar. The default
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251 is t. This is not to be confused with `menu-accelerator-enabled',
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252 which enables the use of Alt+<Letter> accelerators to invoke the
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253 menus.
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254
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255 ** Pixel-based scrolling has been implemented.
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256 By default this will attempt to scroll in increments equal to the
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257 height of the default face. Set `window-pixel-scroll-increment' to
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258 modify this behavior.
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438
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259
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442
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260 ** Operation progress can be displayed using graphical widgets.
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444
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261 See `progress-feedback' for details. This support has been switched
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442
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262 on by default for font-lock and some web browsing functions. If you
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263 do not like this behavior set `progress-feedback-use-echo-area'.
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264
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265 ** The PostgreSQL Relational Database Management System is now supported.
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266 It is now possible to build XEmacs so that the programming interface
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267 to the PostgreSQL RDBMS (libpq) is available in XEmacs Lisp.
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268 Supported versions of PostgreSQL are 6.5.3 (earlier versions may work,
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269 but have not been tested) and 7.0-beta1.
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440
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270
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428
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271 ** Etags changes.
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272
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273 *** In DOS, etags looks for file.cgz if it cannot find file.c.
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274
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275 *** New option --ignore-case-regex is an alternative to --regex. It is now
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276 possible to bind a regexp to a language, by prepending the regexp with
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440
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277 {lang}, where lang is one of the languages that `etags --help' prints
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278 out. This feature is useful especially for regex files, where each
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279 line contains a regular expression. The manual contains details.
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428
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280
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281 *** In C and derived languages, etags creates tags for function
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282 declarations when given the --declarations option.
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283
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284 *** In C++, tags are created for "operator". The tags have the form
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285 "operator+", without spaces between the keyword and the operator.
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286
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287 *** New language Ada: tags are functions, procedures, packages, tasks, and
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288 types.
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289
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290 *** In Fortran, procedure is no more tagged.
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291
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292 *** In Java, tags are created for "interface".
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293
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294 *** In Lisp, "(defstruct (foo", "(defun (operator" and similar constructs
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295 are now tagged.
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296
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297 *** In Perl, the --globals option tags global variables. my and local
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298 variables are tagged.
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299
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300 *** New language Python: def and class at the beginning of a line are tags.
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301
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302 *** .ss files are Scheme files, .pdb is Postscript with C syntax, .psw is
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303 for PSWrap.
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304
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305
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306 * Lisp and internal changes in XEmacs 21.2
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307 ==========================================
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308
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440
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309 ** A new portable dumper is available for beta testing.
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430
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310
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311 Olivier Galibert has written a portable dumper for XEmacs, based on
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312 initial work by Kyle Jones. Normally, XEmacs C sources link into an
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313 executable called `temacs', which loads the Lisp code and "unexecs"
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432
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314 into a proper `xemacs' executable. The unexec() process is hard to
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315 implement correctly and makes XEmacs very hard to port to new
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316 operating systems, or even to new releases of old systems.
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430
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317
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318 A portable dumper is a different approach to dumping: instead of
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319 dumping full-fledged executable, it only dumps out the initialized
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320 data structures (both Lisp and C) into an external file. A normally
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321 running XEmacs only needs to mmap() that file and relocate a bit to
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322 get to the initialized data. In that scheme, there is no difference
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323 between `temacs' and `xemacs'.
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324
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325 This is all very experimental, though. Configure with `--pdump' to
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442
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326 try testing it.
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440
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327
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428
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328 ** Much effort has been invested to make XEmacs Lisp faster:
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329
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330 *** Many basic lisp operations are now faster.
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331 This is especially the case when running a Mule-enabled XEmacs.
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332
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333 A general overhaul of the lisp engine should produce a speedup of 1.4
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334 in a Latin-1 XEmacs, and 2.1 in a Mule XEmacs. These numbers were
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335 obtained running `(byte-compile "simple.el")', which should be a
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336 pretty typical test of "pure" Lisp.
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337
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338 *** Lisp hash tables have been re-implemented. The Common Lisp style
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339 hash table interface has been made standard, and moved from cl.el into
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340 fast C code (See the section on hash tables in the XEmacs Lisp
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341 Reference). A speedup factor of 3 can be expected with code that
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342 makes intensive use of hash tables.
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343
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344 *** The garbage collector has been tuned, leading to a speedup of
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345 1.16.
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346
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347 *** The family of functions that iterate over lists, like `memq', and
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348 `rassq', have been made a little faster (typically 1.3).
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349
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350 *** Lisp function calls are faster, by approximately a factor of two.
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351 However, defining inline functions (via defsubst) still makes sense
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352 for tight loops.
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353
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354 *** Finally, a few functions have had dramatic performance
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355 improvements. For example, `(last long-list)' is now 30 times faster.
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356
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357 Of course, your mileage will vary.
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358
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359 Many operations do not see any improvement. Surprisingly, running
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360 (font-lock-fontify-buffer) does not use the Lisp engine much at all.
|
|
|
361 Speeding up your favorite slow operation is an excellent project to
|
|
|
362 improve XEmacs. Don't forget to profile!
|
|
|
363
|
|
430
|
364 ** Native widgets can be displayed in buffers.
|
|
|
365
|
|
|
366 The glyph system has been extended to allow the display of glyphs that
|
|
|
367 are implemented as native window-system widgets. Thus you can embed
|
|
|
368 buttons, scrollbars, combo boxes, edit fields and progress gauges in a
|
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|
369 buffer. As a side effect subwindow support now works once again.
|
|
|
370
|
|
440
|
371 All of this is still fairly experimental and there is no
|
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442
|
372 documentation. The current APIs might change in a future version of
|
|
|
373 XEmacs. Some widgets are only available under MS-Windows. See the
|
|
440
|
374 file glyphs-test.el in the XEmacs src distribution for examples of
|
|
|
375 usage.
|
|
430
|
376
|
|
440
|
377 The buffers-tab functionality and progress gauge have been implemented
|
|
|
378 using this feature.
|
|
430
|
379
|
|
440
|
380 ** `user-init-file' and `user-init-directory' are now absolute
|
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|
381 file/directory names. Previously, both variables used to be relative
|
|
|
382 to (concat "~" init-file-user). This turned out to be too complicated
|
|
|
383 for most packages (and some core Lisp files) to use correctly. Also,
|
|
|
384 the `init-file-user' variable has been obsoleted in the process.
|
|
|
385
|
|
442
|
386 The user-visible options like `-u' have not changed their behavior.
|
|
430
|
387
|
|
428
|
388 ** XEmacs finally has an automated test suite!
|
|
|
389 Although this is not yet very sophisticated, it is already responsible
|
|
|
390 for several important bug fixes in XEmacs. To try it out, simply use
|
|
|
391 the makefile target `make check' after building XEmacs.
|
|
|
392
|
|
|
393 ** Hash tables have been reimplemented.
|
|
|
394 As was pointed out above, the standard interface to hash tables is now
|
|
|
395 the Common Lisp interface, as described in Common Lisp, the Language
|
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|
396 (CLtL2, by Steele). The older interface (functions with names
|
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|
397 containing the phrase `hashtable') will continue to work, but the
|
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|
398 preferred interface now has names containing the phrase `hash-table'.
|
|
|
399
|
|
|
400 Here's the executive overview: create hash tables using
|
|
|
401 make-hash-table, and use gethash, puthash, remhash, maphash and
|
|
|
402 clrhash to manipulate entries in the hash table. See the (updated)
|
|
|
403 Lisp Reference Manual for details.
|
|
|
404
|
|
|
405 ** Lisp code handles circular lists much more robustly.
|
|
|
406 Many basic lisp functions used to loop forever when given a circular
|
|
|
407 list, expecting you to C-g (quit) out of the loop. Now this is more
|
|
|
408 likely to trigger a `circular-list' error. Printing a circular list
|
|
|
409 now results in something like this:
|
|
|
410
|
|
|
411 (let ((x (cons 'foo 'foo)))
|
|
|
412 (setcdr x x)
|
|
|
413 x)
|
|
|
414 => (foo ... <circular list>)
|
|
|
415
|
|
|
416 An extra bonus is that checking for circularities is not just
|
|
|
417 friendlier, but actually faster than checking for C-g.
|
|
|
418
|
|
430
|
419 ** Functions for decoding base64 encoding are now available; see
|
|
|
420 `base64-encode-region', `base64-encode-string', `base64-decode-region'
|
|
|
421 and `base64-decode-string'.
|
|
428
|
422
|
|
440
|
423 ** The functions `read-string', `read-expression', `eval-minibuffer',
|
|
|
424 `read-variable', `read-command', `read-function', `read-number',
|
|
|
425 `read-shell-command', `read-from-minibuffer', and `completing-read'
|
|
|
426 now take an additional argument which specifies the default value. If
|
|
|
427 this argument is non-nil, it should be a string; that string is used
|
|
|
428 in two ways:
|
|
|
429
|
|
|
430 It is returned if the user enters empty input.
|
|
|
431 It is available through the history command M-n.
|
|
|
432
|
|
|
433 ** LDAP changes.
|
|
|
434
|
|
|
435 *** The LDAP interface now consists of two layers, a low-level layer
|
|
|
436 that closely matches the LDAP C API, and a more convenient
|
|
|
437 higher-level set of functions.
|
|
|
438
|
|
|
439 *** The low-level functions that used to be named *-internal are now
|
|
|
440 named more simply: `ldap-open', `ldap-close', `ldap-search-basic',
|
|
|
441 `ldap-add', and `ldap-modify'. They should be used directly for very
|
|
|
442 specific purposes (such as multiple operations on a connection) only.
|
|
|
443
|
|
|
444 *** The higher-level functions provide a more convenient way to access
|
|
|
445 LDAP directories hiding the subtleties of handling the connection,
|
|
|
446 translating arguments and ensuring compliance with LDAP
|
|
|
447 internationalization rules and formats (currently partly implemented
|
|
|
448 only.) This layer provides atomic operations for searches,
|
|
|
449 modification, addition and deletion of multiple entries at once:
|
|
|
450 `ldap-search-entries', `ldap-add-entries', `ldap-delete-entries', and
|
|
|
451 `ldap-modify-entries'.
|
|
|
452
|
|
|
453 *** To maintain compatibility with previous code, the now obsolete
|
|
|
454 function `ldap-search' is now merely a wrapper that calls either
|
|
|
455 `ldap-search-basic' or `ldap-search-entries'. Please don't use the
|
|
|
456 `ldap-search' function in your new programs -- a direct call to one of
|
|
|
457 the two replacements is more efficient and unambiguous.
|
|
|
458
|
|
430
|
459 ** The arguments to `locate-file' are now more Lisp-like. As before,
|
|
|
460 the usage is:
|
|
428
|
461
|
|
|
462 (locate-file FILENAME PATH-LIST &optional SUFFIXES MODE)
|
|
|
463
|
|
|
464 Except that SUFFIXES are now a list of strings instead of a single,
|
|
|
465 colon-separated string. MODE is now a symbol or a list of symbols
|
|
|
466 (symbols `exists', `executable', `writable', and `readable' are
|
|
|
467 supported) instead of an integer code. See the documentation for
|
|
|
468 details. Of course, the old form is still accepted for backward
|
|
|
469 compatibility.
|
|
|
470
|
|
|
471 Several bugs in locate-file have been fixed, most notably its failure
|
|
|
472 to call expand-file-name on elements of PATH-LIST. Because of that
|
|
|
473 elements of load-path of the form "~/..." used to not work.
|
|
|
474 locate-file is now guaranteed to expand files during its course of
|
|
|
475 operation.
|
|
|
476
|
|
|
477 ** `translate-region' has been improved in several ways. Its TABLE
|
|
|
478 argument used to be a 256-character string. In addition to this, it
|
|
|
479 can now also be a vector or a char-table, which makes the function
|
|
|
480 useful for Mule, which it wasn't. If TABLE a vector or a generic
|
|
|
481 char-table, you can map characters to strings instead of to other
|
|
|
482 characters. For instance:
|
|
|
483
|
|
|
484 (let ((table (make-char-table 'generic)))
|
|
|
485 (put-char-table ?a "the letter a" table)
|
|
|
486 (put-char-table ?b "" table)
|
|
|
487 (put-char-table ?c ?\n table)
|
|
|
488 (translate-region (point-min) (point-max) table))
|
|
|
489
|
|
430
|
490 ** The new form `ignore-file-errors', similar to `ignore-errors' may
|
|
|
491 be used as a short-hand for condition-case when you wish to ignore
|
|
|
492 file-related error. For example:
|
|
|
493
|
|
|
494 (ignore-file-errors (delete-file "foo"))
|
|
|
495
|
|
|
496 ** The first argument to `intern-soft' may now also be a symbol, like
|
|
|
497 with `unintern'. If given a symbol, `intern-soft' will look for that
|
|
|
498 exact symbol rather than for any string. This is useful when you want
|
|
|
499 to check whether a specific symbol is interned in an obarray, e.g.:
|
|
|
500
|
|
|
501 (intern "foo")
|
|
|
502 (intern-soft "foo")
|
|
|
503 => foo
|
|
|
504 (intern-soft (make-symbol "foo"))
|
|
|
505 => nil
|
|
|
506
|
|
428
|
507 ** The `keywordp' function now returns non-nil only on symbols
|
|
|
508 interned in the global obarray. For example:
|
|
|
509
|
|
|
510 (keywordp (intern ":foo" [0]))
|
|
|
511 => nil
|
|
|
512 (keywordp (intern ":foo")) ; The same as (keywordp :foo)
|
|
|
513 => t
|
|
|
514
|
|
442
|
515 This behavior is compatible with other code which treats symbols
|
|
428
|
516 beginning with colon as keywords only if they are interned in the
|
|
|
517 global obarray. `keywordp' used to wrongly return t in both cases
|
|
|
518 above.
|
|
|
519
|
|
442
|
520 ** New variables `this-command-properties' and
|
|
|
521 `last-command-properties' are now available for communication between
|
|
|
522 consecutive commands. Commands should use these to communicate with
|
|
|
523 the pre/post-command hooks, subsequent commands, wrapping commands,
|
|
|
524 etc. in preference to looking at and/or setting `this-command'.
|
|
|
525
|
|
|
526 ** New functions `add-one-shot-hook' and `add-local-one-shot-hook' make
|
|
|
527 it possible to add a "one-shot" hook, which is to say a hook that runs
|
|
|
528 only once, and automatically removes itself after the first time it
|
|
|
529 has run.
|
|
|
530
|
|
|
531 ** The descriptor that specifies the text of a menu item can now be an
|
|
|
532 evaluated expression. This makes this descriptor parallel with
|
|
|
533 others, which can also be expressions.
|
|
|
534
|
|
428
|
535
|
|
|
536 * Changes in XEmacs 21.0
|
|
|
537 ========================
|
|
|
538
|
|
|
539 ** XEmacs has been unbundled into constituent installable packages.
|
|
|
540 See the Info documentation under "Packages" for more information.
|
|
|
541 See the file `etc/PACKAGES' in the distribution for a partial list of
|
|
|
542 packages available at the time of the 21.0 release.
|
|
|
543
|
|
|
544 ** XEmacs is now supported under Microsoft Windows 95/98 and Windows
|
|
|
545 NT operating systems. For starters, look at the XEmacs on Windows FAQ
|
|
|
546 at <URL:http://jagor.srce.hr/~hniksic/xemacs-on-windows-faq.txt>. To
|
|
|
547 discuss Windows-specific issues, subscribe to the mailing list at
|
|
|
548 <xemacs-nt-request@xemacs.org>.
|
|
|
549
|
|
|
550 ** XEmacs will now use `XEmacs' as its application class if it finds
|
|
|
551 any `XEmacs' resources in the resource database. Otherwise, it will
|
|
|
552 continue to use the `Emacs' class.
|
|
|
553
|
|
|
554 ** The options menu has been ported to Custom.
|
|
|
555 This means that each entry in the options menu acts as if you had customized
|
|
|
556 the corresponding variable by hand. ### WARNING: there is currently no
|
|
|
557 upgrading function to help you port your old options settings to the new
|
|
|
558 format. Consequently, if you want to modify the options for XEmacs 21, you
|
|
|
559 will have to set them all again through the menu, and remove the code loading
|
|
|
560 .xemacs-options from your .emacs.
|
|
|
561
|
|
|
562 ** When the Zmacs region is active, `M-x query-replace' and the other
|
|
|
563 replace commands now operate on the region contents only.
|
|
|
564
|
|
|
565 ** XEmacs now is able to choose X visuals and use private colormaps.
|
|
|
566 The '-visual <visualStr>' command line option or the '.EmacsVisual'
|
|
|
567 Xresource controls which visual XEmacs will use, and
|
|
|
568 '-privateColormap' or '.privateColormap' will force XEmacs to create a
|
|
|
569 private colormap for use. The syntax for the visual string is
|
|
|
570 "<visual><bitdepth>" where <visual> is one of 'StaticColor',
|
|
|
571 'TrueColor', 'GrayScale', 'PseudoColor' or 'DirectColor' and
|
|
|
572 <bitdepth> is the appropriate number of bits per pixel. If an invalid
|
|
|
573 or non-supported combination is entered, XEmacs attempts to find a happy
|
|
|
574 medium. The X creation mechanism will then determine if it needs to
|
|
|
575 create a colormap for use, or the presence of the private flags will
|
|
|
576 force it to create it.
|
|
|
577
|
|
|
578 ** The `imenu' package has been ported to XEmacs and is available as a
|
|
|
579 package.
|
|
|
580
|
|
|
581 ** `echo-keystrokes' can now be a floating-point number, so that you
|
|
|
582 can set it to intervals shorter than one second.
|
|
|
583
|
|
|
584 (setq echo-keystrokes 0.1)
|
|
|
585
|
|
|
586 ** The new command `center-to-window-line' works like `recenter'
|
|
|
587 (bound to `C-l'), only it does not redisplay the whole display area.
|
|
|
588
|
|
|
589 ** The M-. command will now first search through exact tags matches,
|
|
|
590 and then through inexact matches, as one would expect.
|
|
|
591
|
|
|
592 ** The new variable `user-full-name' can be used to customize one's
|
|
|
593 name when using the Emacs mail and news reading facilities.
|
|
|
594
|
|
|
595 Normally, `user-full-name' is a function that returns the full name of
|
|
|
596 a user or UID, as specified by the system -- for instance,
|
|
|
597 (user-full-name "root") returns something like "Super-User". However,
|
|
|
598 when the function is called without arguments, it will return the
|
|
|
599 value of the `user-full-name' variable. The `user-full-name' variable
|
|
|
600 is initialized using the environment variable NAME and (failing that)
|
|
|
601 the user's system name.
|
|
|
602
|
|
|
603 The behavior of the `user-full-name' function with an argument
|
|
|
604 specified is unchanged.
|
|
|
605
|
|
|
606 ** The new command `M-x customize-changed-options' lets you customize
|
|
|
607 all the options whose default values have changed in recent Emacs
|
|
|
608 versions. You specify a previous Emacs version number as argument,
|
|
|
609 and the command creates a customization buffer showing all the
|
|
|
610 customizable options whose default values were changed since that
|
|
|
611 version.
|
|
|
612
|
|
|
613 If you don't specify a particular version number argument, then the
|
|
|
614 customization buffer shows all the customizable options for which
|
|
|
615 Emacs versions of changes are recorded.
|
|
|
616
|
|
|
617 ** The new command `add-log-convert' can be used to convert the
|
|
|
618 old-style (pre-20.3) ChangeLog buffers to new style, for
|
|
|
619 consistency. A reminder: if you wish to revert to old-style
|
|
|
620 ChangeLogs instead, customize the value of `add-log-time-format'
|
|
|
621 variable.
|
|
|
622
|
|
|
623 ** The new command `zap-up-to-char' is now available. It is similar
|
|
|
624 to `zap-to-char', except that it does not delete the searched-for
|
|
|
625 character. It is not bound to a key by default.
|
|
|
626
|
|
|
627 ** You can now store a number into a register with `C-u NUMBER C-x r n'
|
|
|
628 REG, increment it by INC with `C-u INC C-x r + REG' (to increment by
|
|
|
629 one, omit C-u INC), and insert it in the buffer with `C-x r g REG'.
|
|
|
630 This is useful for writing keyboard macros.
|
|
|
631
|
|
|
632 ** The M-: command, when given a prefix argument, will now insert its
|
|
|
633 result to the current buffer.
|
|
|
634
|
|
|
635 ** The `C-h c' command, when given a prefix argument, will now insert
|
|
|
636 the message into the current buffer.
|
|
|
637
|
|
|
638 ** Horizontally split windows may now be dragged using the mouse.
|
|
|
639 Because of this, the dividers between vertical windows are always
|
|
|
640 visible. To turn it off, set `vertical-divider-always-visible-p' to
|
|
|
641 nil.
|
|
|
642
|
|
|
643 ** XEmacs/Mule (internationalization) changes.
|
|
|
644
|
|
|
645 *** Mule support now works on TTY's. Use `set-terminal-coding-system'
|
|
|
646 and `set-keyboard-coding-system' to specify the coding system of your
|
|
|
647 display and keyboard.
|
|
|
648
|
|
|
649 *** Egg/SJ3 input method is now officially supported. Quail and
|
|
|
650 Egg/Skk have been available through the generalized Leim since 20.3.
|
|
|
651
|
|
|
652 *** Localized Japanese menubars are available if XEmacs is built with
|
|
|
653 XFONTSET and either the X11 libraries are built with X_LOCALE defined
|
|
|
654 or the native C libraries support Japanese localization. This has
|
|
|
655 been available since 20.3, only it hasn't been announced before.
|
|
|
656
|
|
|
657 ** Jamie Zawinski's `gdb-highlight' extension is now distributed with
|
|
|
658 the `debug' package. gdb-highlight makes most objects printed in a
|
|
|
659 gdb buffer be mouse-sensitive: as text shows up in the buffer, it is
|
|
|
660 parsed, and objects which are recognized have context-sensitive
|
|
|
661 commands attached to them. To use it, add the following to `.emacs':
|
|
|
662
|
|
|
663 (add-hook 'gdb-mode-hook (lambda () (require 'gdb-highlight)))
|
|
|
664
|
|
|
665 ** The package popper.el is now included in the edit-utils package.
|
|
|
666 It has been greatly enhanced with respect to the one once included
|
|
|
667 with the ilisp package and should work well under XEmacs 21.0.
|
|
|
668
|
|
|
669 ** Gnuserv changes
|
|
|
670
|
|
|
671 *** Like the old 'gnudoit' program. Gnuclient -batch now can read from stdin.
|
|
|
672
|
|
|
673 *** Gnuclient -batch no longer breaks off the output at the first LF.
|
|
|
674
|
|
|
675 ** C mode changes
|
|
|
676
|
|
|
677 *** Multiline macros are now handled, both as they affect indentation,
|
|
|
678 and as recognized syntax. New syntactic symbol cpp-macro-cont is
|
|
|
679 assigned to second and subsequent lines of a multiline macro
|
|
|
680 definition.
|
|
|
681
|
|
|
682 *** A new style "user" which captures all non-hook-ified
|
|
|
683 (i.e. top-level) .emacs file variable setings and customizations.
|
|
|
684 Style "cc-mode" is an alias for "user" and is deprecated. "gnu" style
|
|
|
685 is still the default however.
|
|
|
686
|
|
|
687 *** "java" style now conforms to Sun's JDK coding style.
|
|
|
688
|
|
|
689 *** There are new commands c-beginning-of-defun, c-end-of-defun which
|
|
|
690 are alternatives which you could bind to C-M-a and C-M-e if you prefer
|
|
|
691 them. They do not have key bindings by default.
|
|
|
692
|
|
|
693 *** New and improved implementations of M-a (c-beginning-of-statement)
|
|
|
694 and M-e (c-end-of-statement).
|
|
|
695
|
|
|
696 *** C++ namespace blocks are supported, with new syntactic symbols
|
|
|
697 namespace-open, namespace-close, and innamespace.
|
|
|
698
|
|
|
699 *** File local variable settings of c-file-style and c-file-offsets
|
|
|
700 makes the style variables local to that buffer only.
|
|
|
701
|
|
|
702 *** New indentation functions c-lineup-close-paren,
|
|
|
703 c-indent-one-line-block, c-lineup-dont-change.
|
|
|
704
|
|
|
705 *** Improvements (hopefully!) to the way CC Mode is loaded. You
|
|
|
706 should now be able to do a (require 'cc-mode) to get the entire
|
|
|
707 package loaded properly for customization in your .emacs file. A new
|
|
|
708 variable c-initialize-on-load controls this and is t by default.
|
|
|
709
|
|
|
710 ** In Text mode, now only blank lines separate paragraphs.
|
|
|
711 This makes it possible to get the full benefit of Adaptive Fill mode
|
|
|
712 in Text mode, and other modes derived from it (such as Mail mode).
|
|
|
713 TAB in Text mode now runs the command indent-relative; this makes a
|
|
|
714 practical difference only when you use indented paragraphs.
|
|
|
715
|
|
|
716 As a result, the old Indented Text mode is now identical to Text mode,
|
|
|
717 and is an alias for it.
|
|
|
718
|
|
|
719 If you want spaces at the beginning of a line to start a paragraph,
|
|
|
720 use the new mode, Paragraph Indent Text mode.
|
|
|
721
|
|
|
722 ** Changes to Gnus, the XEmacs newsreader.
|
|
|
723
|
|
|
724 *** New functionality for using Gnus as an offline newsreader has been
|
|
|
725 added. A plethora of new commands and modes have been added. See the
|
|
|
726 Gnus manual for the full story.
|
|
|
727
|
|
|
728 *** The nndraft backend has returned, but works differently than
|
|
|
729 before. All Message buffers are now also articles in the nndraft
|
|
|
730 group, which is created automatically.
|
|
|
731
|
|
|
732 *** `gnus-alter-header-function' can now be used to alter header
|
|
|
733 values.
|
|
|
734
|
|
|
735 *** `gnus-summary-goto-article' now accept Message-ID's.
|
|
|
736
|
|
|
737 *** A new Message command for deleting text in the body of a message
|
|
|
738 outside the region: `C-c C-v'.
|
|
|
739
|
|
|
740 *** You can now post to component group in nnvirtual groups with
|
|
|
741 `C-u C-c C-c'.
|
|
|
742
|
|
|
743 *** `nntp-rlogin-program' -- new variable to ease customization.
|
|
|
744
|
|
|
745 *** `C-u C-c C-c' in `gnus-article-edit-mode' will now inhibit
|
|
|
746 re-highlighting of the article buffer.
|
|
|
747
|
|
|
748 *** New element in `gnus-boring-article-headers' -- `long-to'.
|
|
|
749
|
|
|
750 *** `M-i' symbolic prefix command. See the section "Symbolic
|
|
|
751 Prefixes" in the Gnus manual for details.
|
|
|
752
|
|
|
753 *** `L' and `I' in the summary buffer now take the symbolic prefix
|
|
|
754 `a' to add the score rule to the "all.SCORE" file.
|
|
|
755
|
|
|
756 *** `gnus-simplify-subject-functions' variable to allow greater
|
|
|
757 control over simplification.
|
|
|
758
|
|
|
759 *** `A T' -- new command for fetching the current thread.
|
|
|
760
|
|
|
761 *** `/ T' -- new command for including the current thread in the
|
|
|
762 limit.
|
|
|
763
|
|
|
764 *** `M-RET' is a new Message command for breaking cited text.
|
|
|
765
|
|
|
766 *** \\1-expressions are now valid in `nnmail-split-methods'.
|
|
|
767
|
|
|
768 *** The `custom-face-lookup' function has been removed.
|
|
|
769 If you used this function in your initialization files, you must
|
|
|
770 rewrite them to use `face-spec-set' instead.
|
|
|
771
|
|
|
772 *** Cancelling now uses the current select method. Symbolic prefix
|
|
|
773 `a' forces normal posting method.
|
|
|
774
|
|
|
775 *** New command to translate M******** sm*rtq**t*s into proper text
|
|
|
776 -- `W d'.
|
|
|
777
|
|
|
778 *** For easier debugging of nntp, you can set `nntp-record-commands'
|
|
|
779 to a non-nil value.
|
|
|
780
|
|
|
781 *** nntp now uses ~/.authinfo, a .netrc-like file, for controlling
|
|
|
782 where and how to send AUTHINFO to NNTP servers.
|
|
|
783
|
|
|
784 *** A command for editing group parameters from the summary buffer
|
|
|
785 has been added.
|
|
|
786
|
|
|
787 *** A history of where mails have been split is available.
|
|
|
788
|
|
|
789 *** A new article date command has been added -- `article-date-iso8601'.
|
|
|
790
|
|
|
791 *** Subjects can be simplified when threading by setting
|
|
|
792 `gnus-score-thread-simplify'.
|
|
|
793
|
|
|
794 *** A new function for citing in Message has been added --
|
|
|
795 `message-cite-original-without-signature'.
|
|
|
796
|
|
|
797 *** `article-strip-all-blank-lines' -- new article command.
|
|
|
798
|
|
|
799 *** A new Message command to kill to the end of the article has
|
|
|
800 been added.
|
|
|
801
|
|
|
802 *** A minimum adaptive score can be specified by using the
|
|
|
803 `gnus-adaptive-word-minimum' variable.
|
|
|
804
|
|
|
805 *** The "lapsed date" article header can be kept continually
|
|
|
806 updated by the `gnus-start-date-timer' command.
|
|
|
807
|
|
|
808 *** Web listserv archives can be read with the nnlistserv backend.
|
|
|
809
|
|
|
810 *** Old dejanews archives can now be read by nnweb.
|
|
|
811
|
|
|
812 *** Byte-compilation of user-specs now works under XEmacs.
|
|
|
813
|
|
|
814 ** The `dir' files are no longer essential for functioning of the Info
|
|
|
815 subsystem. If the `dir' file does not exist in an Info directory, the
|
|
|
816 relevant information will be generated on-the-fly.
|
|
|
817
|
|
|
818 This behavior can be customized, look for `Info-auto-generate-directory'
|
|
|
819 and `Info-save-auto-generated-dir' in the `info' customization group.
|
|
|
820
|
|
|
821
|
|
|
822 * Lisp and internal changes in XEmacs 21.0
|
|
|
823 ==========================================
|
|
|
824
|
|
|
825 ** It is now possible to build XEmacs with support for 31-bit Lisp
|
|
|
826 integers (normally, Lisp integers are only 28 bits wide on 32-bit
|
|
|
827 machines.) Configure with --use-minimal-tagbits to test. With this
|
|
|
828 change, the maximum buffer size on 32-bit machines is increased from
|
|
|
829 128M to 1G. This setting will be made default in a future XEmacs
|
|
|
830 version.
|
|
|
831
|
|
|
832 ** Specifier changes.
|
|
|
833
|
|
|
834 *** When instantiating a specifier, the window locale now has a higher
|
|
|
835 precedence than the buffer locale. This is because the window locale
|
|
|
836 is more specific than the buffer locale.
|
|
|
837
|
|
|
838 *** The new macro `let-specifier' can be used to temporarily add
|
|
|
839 specifications to specifiers. See the documentation for details.
|
|
|
840
|
|
|
841 *** The new specifiers `vertical-scrollbar-visible-p' and
|
|
|
842 `horizontal-scrollbar-visible-p' may be used to control scrollbar
|
|
|
843 visibility. Previously, the only way to remove a scrollbar was to set
|
|
|
844 its size to 0. This method is still supported for backward
|
|
|
845 compatibility.
|
|
|
846
|
|
|
847 *** The new specifiers `scrollbar-on-left-p' and `scrollbar-on-top-p'
|
|
|
848 may be used to control the position of the vertical and horizontal
|
|
|
849 toolbar. Previously, their position could be changed only through the
|
|
|
850 use of X resources.
|
|
|
851
|
|
|
852 *** The new draggable vertical dividers between windows may be turned
|
|
|
853 off using the `vertical-divider-always-visible-p' specifier. When
|
|
|
854 this is set to nil, the vertical dividers between windows are shown
|
|
|
855 only when needed, and they are not draggable.
|
|
|
856
|
|
|
857 Other properties of the vertical dividers may be controlled using
|
|
|
858 `vertical-divider-shadow-thickness', `vertical-divider-line-width' and
|
|
|
859 `vertical-divider-spacing' specifiers, which see.
|
|
|
860
|
|
|
861 ** Frame focus management changes.
|
|
|
862
|
|
|
863 *** When the variable focus-follows-mouse is non-nil, `select-frame'
|
|
|
864 no longer permanently selects a different frame. The frame selection
|
|
|
865 is temporary and is reverted when the current command terminates, much
|
|
|
866 like the buffer selected by `set-buffer'. This is the same as in FSF
|
|
|
867 Emacs.
|
|
|
868
|
|
|
869 *** The new function `focus-frame' sets the window system focus to
|
|
|
870 FRAME (and selects it), regardless of the value of
|
|
|
871 `focus-follows-mouse'. Doing this is not well behaved, so be
|
|
|
872 absolutely sure that you want this.
|
|
|
873
|
|
|
874 The code that uses `select-frame' only to get the window manager focus
|
|
|
875 should be changed to use `set-frame-focus' instead, so that they keep
|
|
|
876 working when `focus-follows-mouse' is non-nil.
|
|
|
877
|
|
|
878 *** The special forms `save-selected-frame' and `with-selected-frame'
|
|
|
879 can now be used to temporarily change selected frame.
|
|
|
880
|
|
|
881 *** The behavior of `other-frame' command (`C-x 5 o') is unaffected by
|
|
|
882 these changes.
|
|
|
883
|
|
|
884 ** The function `select-window' now has an optional second argument
|
|
|
885 NORECORD which if non-nil inhibits the recording of a buffer change.
|
|
|
886
|
|
|
887 ** The function `vertical-motion' now correctly handles the second,
|
|
|
888 optional WINDOW argument. A new third argument PIXELS, if non-nil,
|
|
|
889 indicates that the returned motion should be in pixels.
|
|
|
890
|
|
|
891 ** The new function `vertical-motion-pixels' is similar to
|
|
|
892 vertical-motion but takes as input a vertical motion in pixels.
|
|
|
893
|
|
|
894 ** The new functions window-text-area-pixel-{width,height,edges} can
|
|
|
895 be used to obtain information about the text-displaying area of a
|
|
|
896 window.
|
|
|
897
|
|
|
898 ** The new functions `shrink-window-pixels' and `enlarge-window-pixels'
|
|
|
899 can be used to adjust the size of a window by a pixel amount.
|
|
|
900
|
|
|
901 ** The new function `window-displayed-text-pixel-height' can be used
|
|
|
902 to determine the height of the text actually displayed in a window.
|
|
|
903
|
|
|
904 ** The arithmetic comparison functions <, >, =, /= now accept a
|
|
|
905 variable number of arguments.
|
|
|
906
|
|
|
907 This means that if you want to test whether A < B < C, you can write
|
|
|
908 it as (< A B C) instead of (and (< A B) (< B C)). Likewise,
|
|
|
909 (apply #'> LIST) now tests if LIST is monotonously increasing -- and
|
|
|
910 so on.
|
|
|
911
|
|
|
912 ** The XEmacs hashtables now have a consistent read/print syntax.
|
|
|
913 This means that a hashtable will be readably printed in a
|
|
|
914 structure-like form:
|
|
|
915
|
|
|
916 #s(hashtable size 2 data (key1 value1 key2 value2))
|
|
|
917
|
|
|
918 When XEmacs reads this form, it will create a new hashtable according
|
|
|
919 to description. This allows you to easily dump hashtables to files
|
|
|
920 using `prin1', and read them back in using `read'.
|
|
|
921
|
|
|
922 If `print-readably' is non-nil, a more relaxed syntax is used; for
|
|
|
923 instance:
|
|
|
924
|
|
|
925 #<hashtable size 2/13 data (key1 value1 key2 value2) 0x874d>
|
|
|
926
|
|
|
927 ** It is now possible to build XEmacs with LDAP support.
|
|
|
928 You will need to install a LDAP library first. The following have
|
|
|
929 been tested:
|
|
|
930 - LDAP 3.3 from the University of Michigan
|
|
|
931 (get it from <URL:http://www.umich.edu/~dirsvcs/ldap/>)
|
|
|
932 - OpenLDAP 1.0.3 from the OpenLDAP Foundation
|
|
|
933 (get it from <URL:http://www.openldap.org/>)
|
|
|
934 - LDAP SDK 1.0 from Netscape Corp.
|
|
|
935 (get it from <URL:http://developer.netscape.com/>)
|
|
|
936
|
|
|
937 ** When profiling is in effect, a call-count of all recorded functions
|
|
|
938 is now calculated. This information is stored in
|
|
|
939 `call-count-profile-table', and is utilized by `profile-results' as
|
|
|
940 well as the new command `profile-call-count-results'.
|
|
|
941
|
|
|
942 ** It is now an error to change the value of a symbol whose name
|
|
|
943 starts with a colon, if it is interned in the standard obarray.
|
|
|
944
|
|
|
945 However, setting such a symbol to its proper value, which is that
|
|
|
946 symbol itself, is not an error. This is for the sake of programs that
|
|
|
947 support pre-19.12 XEmacs and pre-20 GNU Emacs by explicitly setting
|
|
|
948 these variables to themselves.
|
|
|
949
|
|
|
950 ** The `concat' function no longer accepts integer arguments.
|
|
|
951
|
|
|
952 ** The new function `string' concatenates all its argument characters
|
|
|
953 and returns the resulting string. This is consistent with other
|
|
|
954 functions, like `list', `vector', etc.
|
|
|
955
|
|
|
956 ** The function `temp-directory' is now available to return the
|
|
|
957 directory to store temporary files. On Unix this will be obtained
|
|
|
958 from TMPDIR, defaulting to `/tmp'.
|
|
|
959
|
|
|
960 ** The function load-average now accepts an optional argument
|
|
|
961 USE-FLOATS. If it is non-nil, the load average values are returned as
|
|
|
962 floating point numbers, rather than as integers to be divided by 100.
|
|
|
963
|
|
|
964 ** The `make-event' function now supports the TYPE and PLIST
|
|
|
965 arguments, which can be used to create various events from Lisp. See
|
|
|
966 the documentation for details.
|
|
|
967
|
|
|
968 ** `function-interactive' is a new function that returns the
|
|
|
969 interactive specification of a funcallable object.
|
|
|
970
|
|
|
971 ** The new `lmessage' function allows printing of a formatted message
|
|
|
972 with a particular label.
|
|
|
973
|
|
|
974 (lmessage 'progress "Processing... %d" counter)
|
|
|
975
|
|
|
976 This function is more convenient than `display-message' because it
|
|
|
977 automatically applies `format' to its arguments.
|
|
|
978
|
|
|
979 ** The new `lwarn' function, analogous to `lmessage', allows printing
|
|
|
980 a formatted warning, with a non-default CLASS or LABEL.
|
|
|
981
|
|
|
982 ** The new function `split-path' can now be used to explode the
|
|
|
983 components of a colon-separated search path into a list.
|
|
|
984
|
|
|
985 (split-path "foo:bar")
|
|
|
986 => ("foo" "bar")
|
|
|
987
|
|
|
988 ** Specifiers and symbols whose value is a specifier are now allowed
|
|
|
989 as modeline specifications.
|
|
|
990
|
|
|
991 ** defcustom now accepts the keyword `:version'. Use this to specify
|
|
|
992 in which version of Emacs a certain variable's default value changed.
|
|
|
993 For example,
|
|
|
994
|
|
|
995 (defcustom foo-max 34 "*Maximum number of foo's allowed."
|
|
|
996 :type 'integer
|
|
|
997 :group 'foo
|
|
|
998 :version "21.0")
|
|
|
999
|
|
|
1000 This information is used to control the customize-changed-options
|
|
|
1001 command.
|
|
|
1002
|
|
|
1003 ** The line number tracking in modeline is now efficient, even for
|
|
|
1004 very large buffers. This is achieved by caching the line numbers of
|
|
|
1005 recent buffer positions, and reusing them. This cache is used only in
|
|
|
1006 the buffers where `line-number-mode' is in effect.
|
|
|
1007
|
|
|
1008 ** When the new GNU Malloc aka Doug Lea Malloc is available, it will
|
|
|
1009 be used. This should result in better performance on Linux systems
|
|
|
1010 with libc6.
|
|
|
1011
|
|
|
1012 ** The code XEmacs uses to assemble its various paths into the
|
|
|
1013 directory hierarchy has been rewritten to support the package system.
|
|
|
1014 Look under "Startup Paths" in the Info documentation for more
|
|
|
1015 information.
|
|
|
1016
|
|
|
1017 *** site-lisp is no longer part of the load-path by default.
|
|
|
1018 Its use is deprecated, but you can specify --with-site-lisp=yes at the
|
|
|
1019 configure command line to get it back.
|
|
|
1020
|
|
|
1021 *** `Info-default-directory-list' is now obsolete. If you want to
|
|
|
1022 change the path which XEmacs uses to search for info files, set
|
|
|
1023 `Info-directory-list' instead.
|
