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1 ;;; fast-lock.el --- Automagic text properties caching for fast Font Lock mode.
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3 ;; Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
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5 ;; Author: Simon Marshall <simon@gnu.ai.mit.edu>
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6 ;; Keywords: faces files
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7 ;; Version: 3.11.01
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8
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9 ;;; This file is part of GNU Emacs.
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11 ;; GNU Emacs is free software; you can redistribute it and/or modify
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12 ;; it under the terms of the GNU General Public License as published by
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13 ;; the Free Software Foundation; either version 2, or (at your option)
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14 ;; any later version.
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15
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16 ;; GNU Emacs is distributed in the hope that it will be useful,
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17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 ;; GNU General Public License for more details.
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20
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21 ;; You should have received a copy of the GNU General Public License
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22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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24 ;; Boston, MA 02111-1307, USA.
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25
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26 ;;; Commentary:
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27
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28 ;; Lazy Lock mode is a Font Lock support mode.
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29 ;; It makes visiting a file in Font Lock mode faster by restoring its face text
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30 ;; properties from automatically saved associated Font Lock cache files.
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31 ;;
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32 ;; See caveats and feedback below.
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33 ;; See also the lazy-lock package. (But don't use the two at the same time!)
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34
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35 ;; Installation:
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36 ;;
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37 ;; Put in your ~/.emacs:
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38 ;;
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39 ;; (setq font-lock-support-mode 'fast-lock-mode)
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40 ;;
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41 ;; Start up a new Emacs and use font-lock as usual (except that you can use the
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42 ;; so-called "gaudier" fontification regexps on big files without frustration).
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43 ;;
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44 ;; When you visit a file (which has `font-lock-mode' enabled) that has a
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45 ;; corresponding Font Lock cache file associated with it, the Font Lock cache
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46 ;; will be loaded from that file instead of being generated by Font Lock code.
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47
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48 ;; Caveats:
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49 ;;
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50 ;; A cache will be saved when visiting a compressed file using crypt++, but not
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51 ;; be read. This is a "feature"/"consequence"/"bug" of crypt++.
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52 ;;
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53 ;; Version control packages are likely to stamp all over file modification
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54 ;; times. Therefore the act of checking out may invalidate a cache.
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55
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56 ;; History:
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57 ;;
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58 ;; 0.02--1.00:
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59 ;; - Changed name from turbo-prop to fast-lock. Automagic for font-lock only
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60 ;; - Made `fast-lock-mode' a minor mode, like G. Dinesh Dutt's fss-mode
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61 ;; 1.00--1.01:
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62 ;; - Turn on `fast-lock-mode' only if `buffer-file-name' or `interactive-p'
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63 ;; - Made `fast-lock-file-name' use `buffer-name' if `buffer-file-name' is nil
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64 ;; - Moved save-all conditions to `fast-lock-save-cache'
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65 ;; - Added `fast-lock-save-text-properties' to `kill-buffer-hook'
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66 ;; 1.01--2.00: complete rewrite---not worth the space to document
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67 ;; - Changed structure of text properties cache and threw out file mod checks
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68 ;; 2.00--2.01:
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69 ;; - Made `condition-case' forms understand `quit'.
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70 ;; - Made `fast-lock' require `font-lock'
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71 ;; - Made `fast-lock-cache-name' chase links (from Ben Liblit)
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72 ;; 2.01--3.00:
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73 ;; - Changed structure of cache to include `font-lock-keywords' (from rms)
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74 ;; - Changed `fast-lock-cache-mechanisms' to `fast-lock-cache-directories'
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75 ;; - Removed `fast-lock-read-others'
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76 ;; - Made `fast-lock-read-cache' ignore cache owner
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77 ;; - Made `fast-lock-save-cache-external' create cache directory
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78 ;; - Made `fast-lock-save-cache-external' save `font-lock-keywords'
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79 ;; - Made `fast-lock-cache-data' check `font-lock-keywords'
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80 ;; 3.00--3.01: incorporated port of 2.00 to Lucid, made by Barry Warsaw
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81 ;; - Package now provides itself
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82 ;; - Lucid: Use `font-lock-any-extents-p' for `font-lock-any-properties-p'
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83 ;; - Lucid: Use `list-faces' for `face-list'
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84 ;; - Lucid: Added `set-text-properties'
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85 ;; - Lucid: Made `turn-on-fast-lock' pass 1 not t to `fast-lock-mode'
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86 ;; - Removed test for `fast-lock-mode' from `fast-lock-read-cache'
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87 ;; - Lucid: Added Lucid-specific `fast-lock-get-face-properties'
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88 ;; 3.01--3.02: now works with Lucid Emacs, thanks to Barry Warsaw
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89 ;; - Made `fast-lock-cache-name' map ":" to ";" for OS/2 (from Serganova Vera)
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90 ;; - Made `fast-lock-cache-name' use abbreviated file name (from Barry Warsaw)
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91 ;; - Lucid: Separated handlers for `error' and `quit' for `condition-case'
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92 ;; 3.02--3.03:
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93 ;; - Changed `fast-lock-save-cache-external' to `fast-lock-save-cache-data'
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94 ;; - Lucid: Added Lucid-specific `fast-lock-set-face-properties'
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95 ;; 3.03--3.04:
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96 ;; - Corrected `subrp' test of Lucid code
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97 ;; - Replaced `font-lock-any-properties-p' with `text-property-not-all'
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98 ;; - Lucid: Made `fast-lock-set-face-properties' put `text-prop' on extents
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99 ;; - Made `fast-lock-cache-directories' a regexp alist (from Colin Rafferty)
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100 ;; - Made `fast-lock-cache-directory' to return a usable cache file directory
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101 ;; 3.04--3.05:
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102 ;; - Lucid: Fix for XEmacs 19.11 `text-property-not-all'
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103 ;; - Replaced `subrp' test of Lucid code with `emacs-version' `string-match'
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104 ;; - Made `byte-compile-warnings' omit `unresolved' on compilation
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105 ;; - Made `fast-lock-save-cache-data' use a buffer (from Rick Sladkey)
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106 ;; - Reverted to old `fast-lock-get-face-properties' (from Rick Sladkey)
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107 ;; 3.05--3.06: incorporated hack of 3.03, made by Jonathan Stigelman (Stig)
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108 ;; - Reverted to 3.04 version of `fast-lock-get-face-properties'
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109 ;; - XEmacs: Removed `list-faces' `defalias'
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110 ;; - Made `fast-lock-mode' and `turn-on-fast-lock' succeed `autoload' cookies
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111 ;; - Added `fast-lock-submit-bug-report'
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112 ;; - Renamed `fast-lock-save-size' to `fast-lock-minimum-size'
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113 ;; - Made `fast-lock-save-cache' output a message if no save ever attempted
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114 ;; - Made `fast-lock-save-cache-data' output a message if save attempted
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115 ;; - Made `fast-lock-cache-data' output a message if load attempted
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116 ;; - Made `fast-lock-save-cache-data' do `condition-case' not `unwind-protect'
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117 ;; - Made `fast-lock-save-cache' and `fast-lock-read-cache' return nothing
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118 ;; - Made `fast-lock-save-cache' check `buffer-modified-p' (Stig)
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119 ;; - Added `fast-lock-save-events'
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120 ;; - Added `fast-lock-after-save-hook' to `after-save-hook' (Stig)
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121 ;; - Added `fast-lock-kill-buffer-hook' to `kill-buffer-hook'
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122 ;; - Changed `fast-lock-save-caches' to `fast-lock-kill-emacs-hook'
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123 ;; - Added `fast-lock-kill-emacs-hook' to `kill-emacs-hook'
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124 ;; - Made `fast-lock-save-cache' check `verify-visited-file-modtime' (Stig)
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125 ;; - Made `visited-file-modtime' be the basis of the timestamp (Stig)
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126 ;; - Made `fast-lock-save-cache-1' and `fast-lock-cache-data' use/reformat it
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127 ;; - Added `fast-lock-cache-filename' to keep track of the cache file name
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128 ;; - Added `fast-lock-after-fontify-buffer'
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129 ;; - Added `fast-lock-save-faces' list of faces to save (idea from Stig/Tibor)
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130 ;; - Made `fast-lock-get-face-properties' functions use it
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131 ;; - XEmacs: Made `fast-lock-set-face-properties' do extents the Font Lock way
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132 ;; - XEmacs: Removed fix for `text-property-not-all' (19.11 support dropped)
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133 ;; - Made `fast-lock-mode' ensure `font-lock-mode' is on
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134 ;; - Made `fast-lock-save-cache' do `cdr-safe' not `cdr' (from Dave Foster)
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135 ;; - Made `fast-lock-save-cache' do `set-buffer' first (from Dave Foster)
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136 ;; - Made `fast-lock-save-cache' loop until saved or quit (from Georg Nikodym)
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137 ;; - Made `fast-lock-cache-data' check `buffer-modified-p'
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138 ;; - Made `fast-lock-cache-data' do `font-lock-compile-keywords' if necessary
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139 ;; - XEmacs: Made `font-lock-compile-keywords' `defalias'
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140 ;; 3.06--3.07:
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141 ;; - XEmacs: Add `fast-lock-after-fontify-buffer' to the Font Lock hook
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142 ;; - Made `fast-lock-cache-name' explain the use of `directory-abbrev-alist'
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143 ;; - Made `fast-lock-mode' use `buffer-file-truename' not `buffer-file-name'
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144 ;; 3.07--3.08:
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145 ;; - Made `fast-lock-read-cache' set `fast-lock-cache-filename'
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146 ;; 3.08--3.09:
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147 ;; - Made `fast-lock-save-cache' cope if `fast-lock-minimum-size' is an a list
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148 ;; - Made `fast-lock-mode' respect the value of `font-lock-inhibit-thing-lock'
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149 ;; - Added `fast-lock-after-unfontify-buffer'
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150 ;; 3.09--3.10:
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151 ;; - Rewrite for Common Lisp macros
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152 ;; - Made fast-lock.el barf on a crap 8+3 pseudo-OS (Eli Zaretskii help)
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153 ;; - XEmacs: Made `add-minor-mode' succeed `autoload' cookie
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154 ;; - XEmacs: Made `fast-lock-save-faces' default to `font-lock-face-list'
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155 ;; - Made `fast-lock-save-cache' use `font-lock-value-in-major-mode'
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156 ;; - Wrap with `save-buffer-state' (Ray Van Tassle report)
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157 ;; - Made `fast-lock-mode' wrap `font-lock-support-mode'
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158 ;; 3.10--3.11:
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159 ;; - Made `fast-lock-get-face-properties' cope with face lists
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160 ;; - Added `fast-lock-verbose'
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161 ;; - XEmacs: Add `font-lock-value-in-major-mode' if necessary
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162 ;; - Removed `fast-lock-submit-bug-report' and bade farewell
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163 ;; 3.10--3.11:
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164
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165 ;;; Code:
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166
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167 (require 'font-lock)
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168
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169 ;; Make sure fast-lock.el is supported.
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170 (if (and (eq system-type 'ms-dos) (not (msdos-long-file-names)))
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171 (error "`fast-lock' was written for long file name systems"))
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172
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173 (eval-when-compile
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174 ;;
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175 ;; We don't do this at the top-level as we only use non-autoloaded macros.
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176 (require 'cl)
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177 ;;
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178 ;; I prefer lazy code---and lazy mode.
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179 (setq byte-compile-dynamic t byte-compile-dynamic-docstrings t)
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180 ;; But, we make sure that the code is as zippy as can be.
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181 (setq byte-optimize t)
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182 ;;
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183 ;; We use this to preserve or protect things when modifying text properties.
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184 (defmacro save-buffer-state (varlist &rest body)
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185 "Bind variables according to VARLIST and eval BODY restoring buffer state."
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186 (` (let* ((,@ (append varlist
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187 '((modified (buffer-modified-p))
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188 (inhibit-read-only t) (buffer-undo-list t)
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189 before-change-functions after-change-functions
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190 deactivate-mark buffer-file-name buffer-file-truename))))
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191 (,@ body)
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192 (when (and (not modified) (buffer-modified-p))
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193 (set-buffer-modified-p nil)))))
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194 (put 'save-buffer-state 'lisp-indent-function 1)
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195 ;;
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196 ;; We use this to verify that a face should be saved.
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197 (defmacro fast-lock-save-facep (face)
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198 "Return non-nil if FACE is one of `fast-lock-save-faces'."
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199 (` (or (null fast-lock-save-faces)
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200 (if (symbolp (, face))
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201 (memq (, face) fast-lock-save-faces)
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202 (let ((faces (, face)))
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203 (while (unless (memq (car faces) fast-lock-save-faces)
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204 (setq faces (cdr faces))))
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205 faces))))))
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206
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207 ;(defun fast-lock-submit-bug-report ()
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208 ; "Submit via mail a bug report on fast-lock.el."
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209 ; (interactive)
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210 ; (let ((reporter-prompt-for-summary-p t))
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211 ; (reporter-submit-bug-report "simon@gnu.ai.mit.edu" "fast-lock 3.11.01"
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212 ; '(fast-lock-cache-directories fast-lock-minimum-size
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213 ; fast-lock-save-others fast-lock-save-events fast-lock-save-faces
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214 ; fast-lock-verbose)
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215 ; nil nil
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216 ; (concat "Hi Si.,
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217 ;
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218 ;I want to report a bug. I've read the `Bugs' section of `Info' on Emacs, so I
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219 ;know how to make a clear and unambiguous report. To reproduce the bug:
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220 ;
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221 ;Start a fresh editor via `" invocation-name " -no-init-file -no-site-file'.
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222 ;In the `*scratch*' buffer, evaluate:"))))
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223
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224 (defvar fast-lock-mode nil) ; Whether we are turned on.
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225 (defvar fast-lock-cache-timestamp nil) ; For saving/reading.
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226 (defvar fast-lock-cache-filename nil) ; For deleting.
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227
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228 ;; User Variables:
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229
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230 (defgroup fast-lock nil
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231 "Automagic text properties caching for fast Font Lock mode"
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232 :group 'faces)
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233
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234
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235 (defcustom fast-lock-cache-directories '("." "~/.emacs-flc")
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236 ; - `internal', keep each file's Font Lock cache file in the same file.
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237 ; - `external', keep each file's Font Lock cache file in the same directory.
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238 "*Directories in which Font Lock cache files are saved and read.
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239 Each item should be either DIR or a cons pair of the form (REGEXP . DIR) where
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240 DIR is a directory name (relative or absolute) and REGEXP is a regexp.
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241
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242 An attempt will be made to save or read Font Lock cache files using these items
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243 until one succeeds (i.e., until a readable or writable one is found). If an
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244 item contains REGEXP, DIR is used only if the buffer file name matches REGEXP.
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245 For example:
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246
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247 (let ((home (expand-file-name (abbreviate-file-name (file-truename \"~/\")))))
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248 (list (cons (concat \"^\" (regexp-quote home)) \".\") \"~/.emacs-flc\"))
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249 =>
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250 ((\"^/your/true/home/directory/\" . \".\") \"~/.emacs-flc\")
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251
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252 would cause a file's current directory to be used if the file is under your
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253 home directory hierarchy, or otherwise the absolute directory `~/.emacs-flc'."
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254 :type '(repeat (choice (cons regexp directory) directory))
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255 :group 'fast-lock)
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256
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257 (defcustom fast-lock-minimum-size (* 25 1024)
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258 "*Minimum size of a buffer for cached fontification.
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259 Only buffers more than this can have associated Font Lock cache files saved.
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260 If nil, means cache files are never created.
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261 If a list, each element should be a cons pair of the form (MAJOR-MODE . SIZE),
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262 where MAJOR-MODE is a symbol or t (meaning the default). For example:
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263 ((c-mode . 25600) (c++-mode . 25600) (rmail-mode . 1048576))
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264 means that the minimum size is 25K for buffers in C or C++ modes, one megabyte
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265 for buffers in Rmail mode, and size is irrelevant otherwise."
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266 :type '(choice (integer :tag "Size") (repeat (cons (symbol :tag "Major Mode")
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267 (integer :tag "Size"))))
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268 :group 'fast-lock)
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269
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270 (defcustom fast-lock-save-events '(kill-buffer kill-emacs)
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271 "*Events under which caches will be saved.
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272 Valid events are `save-buffer', `kill-buffer' and `kill-emacs'.
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273 If concurrent editing sessions use the same associated cache file for a file's
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274 buffer, then you should add `save-buffer' to this list."
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275 :type '(set (const kill-buffer) (const save-buffer) (const kill-emacs))
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276 :group 'fast-lock)
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277
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278 (defcustom fast-lock-save-others t
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279 "*If non-nil, save Font Lock cache files irrespective of file owner.
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280 If nil, means only buffer files known to be owned by you can have associated
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281 Font Lock cache files saved. Ownership may be unknown for networked files."
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282 :type 'boolean
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283 :group 'fast-lock)
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284
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285 (defvar fast-lock-save-faces
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286 (when (save-match-data (string-match "XEmacs" (emacs-version)))
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287 ;; XEmacs uses extents for everything, so we have to pick the right ones.
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288 font-lock-face-list)
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289 "Faces that will be saved in a Font Lock cache file.
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290 If nil, means information for all faces will be saved.")
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291
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292 (defcustom fast-lock-verbose font-lock-verbose
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293 "*If non-nil, means show status messages for cache processing.
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294 If a number, only buffers greater than this size have processing messages."
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295 :type '(choice integer boolean)
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296 :group 'fast-lock)
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297
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298 ;; User Functions:
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299
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300 ;;;###autoload
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301 (defun fast-lock-mode (&optional arg)
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302 "Toggle Fast Lock mode.
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303 With arg, turn Fast Lock mode on if and only if arg is positive and the buffer
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304 is associated with a file. Enable it automatically in your `~/.emacs' by:
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305
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2
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306 (setq font-lock-support-mode 'fast-lock-mode)
|
|
0
|
307
|
|
|
308 If Fast Lock mode is enabled, and the current buffer does not contain any text
|
|
|
309 properties, any associated Font Lock cache is used if its timestamp matches the
|
|
|
310 buffer's file, and its `font-lock-keywords' match those that you are using.
|
|
|
311
|
|
|
312 Font Lock caches may be saved:
|
|
100
|
313 - When you save the file's buffer.
|
|
|
314 - When you kill an unmodified file's buffer.
|
|
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315 - When you exit Emacs, for all unmodified or saved buffers.
|
|
0
|
316 Depending on the value of `fast-lock-save-events'.
|
|
|
317 See also the commands `fast-lock-read-cache' and `fast-lock-save-cache'.
|
|
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318
|
|
|
319 Use \\[font-lock-fontify-buffer] to fontify the buffer if the cache is bad.
|
|
|
320
|
|
|
321 Various methods of control are provided for the Font Lock cache. In general,
|
|
|
322 see variable `fast-lock-cache-directories' and function `fast-lock-cache-name'.
|
|
|
323 For saving, see variables `fast-lock-minimum-size', `fast-lock-save-events',
|
|
98
|
324 `fast-lock-save-others' and `fast-lock-save-faces'."
|
|
0
|
325 (interactive "P")
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|
|
326 ;; Only turn on if we are visiting a file. We could use `buffer-file-name',
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|
|
327 ;; but many packages temporarily wrap that to nil when doing their own thing.
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|
|
328 (set (make-local-variable 'fast-lock-mode)
|
|
|
329 (and buffer-file-truename
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2
|
330 (not (memq 'fast-lock-mode font-lock-inhibit-thing-lock))
|
|
0
|
331 (if arg (> (prefix-numeric-value arg) 0) (not fast-lock-mode))))
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|
|
332 (if (and fast-lock-mode (not font-lock-mode))
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2
|
333 ;; Turned on `fast-lock-mode' rather than `font-lock-mode'.
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|
|
334 (let ((font-lock-support-mode 'fast-lock-mode))
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|
0
|
335 (font-lock-mode t))
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|
|
336 ;; Let's get down to business.
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|
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337 (set (make-local-variable 'fast-lock-cache-timestamp) nil)
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|
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338 (set (make-local-variable 'fast-lock-cache-filename) nil)
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|
2
|
339 (when (and fast-lock-mode (not font-lock-fontified))
|
|
|
340 (fast-lock-read-cache))))
|
|
0
|
341
|
|
|
342 (defun fast-lock-read-cache ()
|
|
|
343 "Read the Font Lock cache for the current buffer.
|
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344
|
|
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345 The following criteria must be met for a Font Lock cache file to be read:
|
|
100
|
346 - Fast Lock mode must be turned on in the buffer.
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|
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347 - The buffer must not be modified.
|
|
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348 - The buffer's `font-lock-keywords' must match the cache's.
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|
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349 - The buffer file's timestamp must match the cache's.
|
|
|
350 - Criteria imposed by `fast-lock-cache-directories'.
|
|
0
|
351
|
|
|
352 See `fast-lock-mode'."
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|
|
353 (interactive)
|
|
|
354 (let ((directories fast-lock-cache-directories)
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|
|
355 (modified (buffer-modified-p)) (inhibit-read-only t)
|
|
|
356 (fontified font-lock-fontified))
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|
|
357 (set (make-local-variable 'font-lock-fontified) nil)
|
|
|
358 ;; Keep trying directories until fontification is turned off.
|
|
|
359 (while (and directories (not font-lock-fontified))
|
|
|
360 (let ((directory (fast-lock-cache-directory (car directories) nil)))
|
|
2
|
361 (condition-case nil
|
|
|
362 (when directory
|
|
|
363 (setq fast-lock-cache-filename (fast-lock-cache-name directory))
|
|
|
364 (when (file-readable-p fast-lock-cache-filename)
|
|
|
365 (load fast-lock-cache-filename t t t)))
|
|
|
366 (error nil) (quit nil))
|
|
0
|
367 (setq directories (cdr directories))))
|
|
|
368 ;; Unset `fast-lock-cache-filename', and restore `font-lock-fontified', if
|
|
|
369 ;; we don't use a cache. (Note that `fast-lock-cache-data' sets the value
|
|
|
370 ;; of `fast-lock-cache-timestamp'.)
|
|
|
371 (set-buffer-modified-p modified)
|
|
2
|
372 (unless font-lock-fontified
|
|
|
373 (setq fast-lock-cache-filename nil font-lock-fontified fontified))))
|
|
0
|
374
|
|
|
375 (defun fast-lock-save-cache (&optional buffer)
|
|
|
376 "Save the Font Lock cache of BUFFER or the current buffer.
|
|
|
377
|
|
|
378 The following criteria must be met for a Font Lock cache file to be saved:
|
|
100
|
379 - Fast Lock mode must be turned on in the buffer.
|
|
|
380 - The event must be one of `fast-lock-save-events'.
|
|
|
381 - The buffer must be at least `fast-lock-minimum-size' bytes long.
|
|
|
382 - The buffer file must be owned by you, or `fast-lock-save-others' must be t.
|
|
|
383 - The buffer must contain at least one `face' text property.
|
|
|
384 - The buffer must not be modified.
|
|
|
385 - The buffer file's timestamp must be the same as the file's on disk.
|
|
|
386 - The on disk file's timestamp must be different than the buffer's cache.
|
|
|
387 - Criteria imposed by `fast-lock-cache-directories'.
|
|
0
|
388
|
|
|
389 See `fast-lock-mode'."
|
|
|
390 (interactive)
|
|
|
391 (save-excursion
|
|
2
|
392 (when buffer
|
|
|
393 (set-buffer buffer))
|
|
|
394 (let ((min-size (font-lock-value-in-major-mode fast-lock-minimum-size))
|
|
|
395 (file-timestamp (visited-file-modtime)) (saved nil))
|
|
|
396 (when (and fast-lock-mode
|
|
|
397 ;;
|
|
|
398 ;; "Only save if the buffer matches the file, the file has
|
|
|
399 ;; changed, and it was changed by the current emacs session."
|
|
|
400 ;;
|
|
|
401 ;; Only save if the buffer is not modified,
|
|
|
402 ;; (i.e., so we don't save for something not on disk)
|
|
|
403 (not (buffer-modified-p))
|
|
|
404 ;; and the file's timestamp is the same as the buffer's,
|
|
|
405 ;; (i.e., someone else hasn't written the file in the meantime)
|
|
|
406 (verify-visited-file-modtime (current-buffer))
|
|
|
407 ;; and the file's timestamp is different from the cache's.
|
|
|
408 ;; (i.e., a save has occurred since the cache was read)
|
|
|
409 (not (equal fast-lock-cache-timestamp file-timestamp))
|
|
|
410 ;;
|
|
|
411 ;; Only save if user's restrictions are satisfied.
|
|
|
412 (and min-size (>= (buffer-size) min-size))
|
|
|
413 (or fast-lock-save-others
|
|
|
414 (eq (user-uid) (nth 2 (file-attributes buffer-file-name))))
|
|
|
415 ;;
|
|
|
416 ;; Only save if there are `face' properties to save.
|
|
|
417 (text-property-not-all (point-min) (point-max) 'face nil))
|
|
|
418 ;;
|
|
|
419 ;; Try each directory until we manage to save or the user quits.
|
|
|
420 (let ((directories fast-lock-cache-directories))
|
|
|
421 (while (and directories (memq saved '(nil error)))
|
|
|
422 (let* ((dir (fast-lock-cache-directory (car directories) t))
|
|
|
423 (file (and dir (fast-lock-cache-name dir))))
|
|
|
424 (when (and file (file-writable-p file))
|
|
|
425 (setq saved (fast-lock-save-cache-1 file file-timestamp)))
|
|
|
426 (setq directories (cdr directories)))))))))
|
|
0
|
427
|
|
|
428 ;;;###autoload
|
|
|
429 (defun turn-on-fast-lock ()
|
|
|
430 "Unconditionally turn on Fast Lock mode."
|
|
|
431 (fast-lock-mode t))
|
|
100
|
432
|
|
0
|
433 ;;; API Functions:
|
|
|
434
|
|
|
435 (defun fast-lock-after-fontify-buffer ()
|
|
|
436 ;; Delete the Font Lock cache file used to restore fontification, if any.
|
|
2
|
437 (when fast-lock-cache-filename
|
|
|
438 (if (file-writable-p fast-lock-cache-filename)
|
|
|
439 (delete-file fast-lock-cache-filename)
|
|
|
440 (message "File %s font lock cache cannot be deleted" (buffer-name))))
|
|
0
|
441 ;; Flag so that a cache will be saved later even if the file is never saved.
|
|
|
442 (setq fast-lock-cache-timestamp nil))
|
|
2
|
443
|
|
|
444 (defalias 'fast-lock-after-unfontify-buffer
|
|
|
445 'ignore)
|
|
100
|
446
|
|
0
|
447 ;; Miscellaneous Functions:
|
|
|
448
|
|
2
|
449 (defun fast-lock-save-cache-after-save-file ()
|
|
0
|
450 ;; Do `fast-lock-save-cache' if `save-buffer' is on `fast-lock-save-events'.
|
|
2
|
451 (when (memq 'save-buffer fast-lock-save-events)
|
|
|
452 (fast-lock-save-cache)))
|
|
0
|
453
|
|
2
|
454 (defun fast-lock-save-cache-before-kill-buffer ()
|
|
0
|
455 ;; Do `fast-lock-save-cache' if `kill-buffer' is on `fast-lock-save-events'.
|
|
2
|
456 (when (memq 'kill-buffer fast-lock-save-events)
|
|
|
457 (fast-lock-save-cache)))
|
|
0
|
458
|
|
2
|
459 (defun fast-lock-save-caches-before-kill-emacs ()
|
|
0
|
460 ;; Do `fast-lock-save-cache's if `kill-emacs' is on `fast-lock-save-events'.
|
|
2
|
461 (when (memq 'kill-emacs fast-lock-save-events)
|
|
|
462 (mapcar 'fast-lock-save-cache (buffer-list))))
|
|
0
|
463
|
|
|
464 (defun fast-lock-cache-directory (directory create)
|
|
|
465 "Return usable directory based on DIRECTORY.
|
|
|
466 Returns nil if the directory does not exist, or, if CREATE non-nil, cannot be
|
|
|
467 created. DIRECTORY may be a string or a cons pair of the form (REGEXP . DIR).
|
|
|
468 See `fast-lock-cache-directories'."
|
|
|
469 (let ((dir
|
|
|
470 (cond ((not buffer-file-name)
|
|
|
471 ;; Should never be nil, but `crypt++' screws it up.
|
|
|
472 nil)
|
|
|
473 ((stringp directory)
|
|
|
474 ;; Just a directory.
|
|
|
475 directory)
|
|
|
476 (t
|
|
|
477 ;; A directory iff the file name matches the regexp.
|
|
|
478 (let ((bufile (expand-file-name buffer-file-truename))
|
|
|
479 (case-fold-search nil))
|
|
2
|
480 (when (save-match-data (string-match (car directory) bufile))
|
|
|
481 (cdr directory)))))))
|
|
0
|
482 (cond ((not dir)
|
|
|
483 nil)
|
|
|
484 ((file-accessible-directory-p dir)
|
|
|
485 dir)
|
|
|
486 (create
|
|
|
487 (condition-case nil
|
|
|
488 (progn (make-directory dir t) dir)
|
|
|
489 (error nil))))))
|
|
|
490
|
|
|
491 ;; If you are wondering why we only hash if the directory is not ".", rather
|
|
|
492 ;; than if `file-name-absolute-p', it is because if we just appended ".flc" for
|
|
|
493 ;; relative cache directories (that are not ".") then it is possible that more
|
|
|
494 ;; than one file would have the same cache name in that directory, if the luser
|
|
|
495 ;; made a link from one relative cache directory to another. (Phew!)
|
|
|
496 (defun fast-lock-cache-name (directory)
|
|
|
497 "Return full cache path name using caching DIRECTORY.
|
|
|
498 If DIRECTORY is `.', the path is the buffer file name appended with `.flc'.
|
|
|
499 Otherwise, the path name is constructed from DIRECTORY and the buffer's true
|
|
|
500 abbreviated file name, with all `/' characters in the name replaced with `#'
|
|
|
501 characters, and appended with `.flc'.
|
|
|
502
|
|
|
503 If the same file has different cache path names when edited on different
|
|
|
504 machines, e.g., on one machine the cache file name has the prefix `#home',
|
|
|
505 perhaps due to automount, try putting in your `~/.emacs' something like:
|
|
|
506
|
|
|
507 (setq directory-abbrev-alist (cons '(\"^/home/\" . \"/\") directory-abbrev-alist))
|
|
|
508
|
|
|
509 Emacs automagically removes the common `/tmp_mnt' automount prefix by default.
|
|
|
510
|
|
|
511 See `fast-lock-cache-directory'."
|
|
|
512 (if (string-equal directory ".")
|
|
|
513 (concat buffer-file-name ".flc")
|
|
|
514 (let* ((bufile (expand-file-name buffer-file-truename))
|
|
|
515 (chars-alist
|
|
|
516 (if (eq system-type 'emx)
|
|
|
517 '((?/ . (?#)) (?# . (?# ?#)) (?: . (?\;)) (?\; . (?\; ?\;)))
|
|
|
518 '((?/ . (?#)) (?# . (?# ?#)))))
|
|
|
519 (mapchars
|
|
|
520 (function (lambda (c) (or (cdr (assq c chars-alist)) (list c))))))
|
|
|
521 (concat
|
|
|
522 (file-name-as-directory (expand-file-name directory))
|
|
|
523 (mapconcat 'char-to-string (apply 'append (mapcar mapchars bufile)) "")
|
|
|
524 ".flc"))))
|
|
100
|
525
|
|
0
|
526 ;; Font Lock Cache Processing Functions:
|
|
|
527
|
|
|
528 (defun fast-lock-save-cache-1 (file timestamp)
|
|
|
529 ;; Save the FILE with the TIMESTAMP as:
|
|
|
530 ;; (fast-lock-cache-data Version=2 TIMESTAMP font-lock-keywords PROPERTIES).
|
|
|
531 ;; Returns non-nil if a save was attempted to a writable cache file.
|
|
|
532 (let ((tpbuf (generate-new-buffer " *fast-lock*"))
|
|
98
|
533 (verbose (if (numberp fast-lock-verbose)
|
|
|
534 (> (buffer-size) fast-lock-verbose)
|
|
|
535 fast-lock-verbose))
|
|
|
536 (saved t))
|
|
|
537 (if verbose (message "Saving %s font lock cache..." (buffer-name)))
|
|
0
|
538 (condition-case nil
|
|
|
539 (save-excursion
|
|
|
540 (print (list 'fast-lock-cache-data 2
|
|
|
541 (list 'quote timestamp)
|
|
|
542 (list 'quote font-lock-keywords)
|
|
|
543 (list 'quote (fast-lock-get-face-properties)))
|
|
|
544 tpbuf)
|
|
|
545 (set-buffer tpbuf)
|
|
|
546 (write-region (point-min) (point-max) file nil 'quietly)
|
|
|
547 (setq fast-lock-cache-timestamp timestamp
|
|
|
548 fast-lock-cache-filename file))
|
|
|
549 (error (setq saved 'error)) (quit (setq saved 'quit)))
|
|
|
550 (kill-buffer tpbuf)
|
|
98
|
551 (if verbose (message "Saving %s font lock cache...%s" (buffer-name)
|
|
|
552 (cond ((eq saved 'error) "failed")
|
|
|
553 ((eq saved 'quit) "aborted")
|
|
|
554 (t "done"))))
|
|
0
|
555 ;; We return non-nil regardless of whether a failure occurred.
|
|
|
556 saved))
|
|
|
557
|
|
|
558 (defun fast-lock-cache-data (version timestamp keywords properties
|
|
|
559 &rest ignored)
|
|
|
560 ;; Change from (HIGH LOW) for back compatibility. Remove for version 3!
|
|
2
|
561 (when (consp (cdr-safe timestamp))
|
|
|
562 (setcdr timestamp (nth 1 timestamp)))
|
|
0
|
563 ;; Compile KEYWORDS and `font-lock-keywords' in case one is and one isn't.
|
|
|
564 (let ((current font-lock-keywords))
|
|
|
565 (setq keywords (font-lock-compile-keywords keywords)
|
|
|
566 font-lock-keywords (font-lock-compile-keywords current)))
|
|
|
567 ;; Use the Font Lock cache PROPERTIES if we're using cache VERSION format 2,
|
|
|
568 ;; the current buffer's file timestamp matches the TIMESTAMP, and the current
|
|
|
569 ;; buffer's font-lock-keywords are the same as KEYWORDS.
|
|
|
570 (let ((buf-timestamp (visited-file-modtime))
|
|
98
|
571 (verbose (if (numberp fast-lock-verbose)
|
|
|
572 (> (buffer-size) fast-lock-verbose)
|
|
|
573 fast-lock-verbose))
|
|
|
574 (loaded t))
|
|
0
|
575 (if (or (/= version 2)
|
|
|
576 (buffer-modified-p)
|
|
|
577 (not (equal timestamp buf-timestamp))
|
|
|
578 (not (equal keywords font-lock-keywords)))
|
|
|
579 (setq loaded nil)
|
|
98
|
580 (if verbose (message "Loading %s font lock cache..." (buffer-name)))
|
|
0
|
581 (condition-case nil
|
|
|
582 (fast-lock-set-face-properties properties)
|
|
|
583 (error (setq loaded 'error)) (quit (setq loaded 'quit)))
|
|
98
|
584 (if verbose (message "Loading %s font lock cache...%s" (buffer-name)
|
|
|
585 (cond ((eq loaded 'error) "failed")
|
|
|
586 ((eq loaded 'quit) "aborted")
|
|
|
587 (t "done")))))
|
|
0
|
588 (setq font-lock-fontified (eq loaded t)
|
|
|
589 fast-lock-cache-timestamp (and (eq loaded t) timestamp))))
|
|
100
|
590
|
|
0
|
591 ;; Text Properties Processing Functions:
|
|
|
592
|
|
100
|
593 ;; This is fast, but fails if adjacent characters have different `face' text
|
|
0
|
594 ;; properties. Maybe that's why I dropped it in the first place?
|
|
|
595 ;(defun fast-lock-get-face-properties ()
|
|
|
596 ; "Return a list of all `face' text properties in the current buffer.
|
|
|
597 ;Each element of the list is of the form (VALUE START1 END1 START2 END2 ...)
|
|
|
598 ;where VALUE is a `face' property value and STARTx and ENDx are positions."
|
|
|
599 ; (save-restriction
|
|
|
600 ; (widen)
|
|
|
601 ; (let ((start (text-property-not-all (point-min) (point-max) 'face nil))
|
|
|
602 ; (limit (point-max)) end properties value cell)
|
|
|
603 ; (while start
|
|
|
604 ; (setq end (next-single-property-change start 'face nil limit)
|
|
|
605 ; value (get-text-property start 'face))
|
|
|
606 ; ;; Make, or add to existing, list of regions with same `face'.
|
|
|
607 ; (if (setq cell (assq value properties))
|
|
|
608 ; (setcdr cell (cons start (cons end (cdr cell))))
|
|
|
609 ; (setq properties (cons (list value start end) properties)))
|
|
|
610 ; (setq start (next-single-property-change end 'face)))
|
|
|
611 ; properties)))
|
|
|
612
|
|
100
|
613 ;; This is slow, but copes if adjacent characters have different `face' text
|
|
|
614 ;; properties, but fails if they are lists.
|
|
98
|
615 ;(defun fast-lock-get-face-properties ()
|
|
|
616 ; "Return a list of all `face' text properties in the current buffer.
|
|
|
617 ;Each element of the list is of the form (VALUE START1 END1 START2 END2 ...)
|
|
|
618 ;where VALUE is a `face' property value and STARTx and ENDx are positions.
|
|
|
619 ;Only those `face' VALUEs in `fast-lock-save-faces' are returned."
|
|
|
620 ; (save-restriction
|
|
|
621 ; (widen)
|
|
|
622 ; (let ((faces (or fast-lock-save-faces (face-list))) (limit (point-max))
|
|
|
623 ; properties regions face start end)
|
|
|
624 ; (while faces
|
|
|
625 ; (setq face (car faces) faces (cdr faces) regions () end (point-min))
|
|
|
626 ; ;; Make a list of start/end regions with `face' property face.
|
|
|
627 ; (while (setq start (text-property-any end limit 'face face))
|
|
|
628 ; (setq end (or (text-property-not-all start limit 'face face) limit)
|
|
|
629 ; regions (cons start (cons end regions))))
|
|
|
630 ; ;; Add `face' face's regions, if any, to properties.
|
|
|
631 ; (when regions
|
|
|
632 ; (push (cons face regions) properties)))
|
|
|
633 ; properties)))
|
|
|
634
|
|
0
|
635 (defun fast-lock-get-face-properties ()
|
|
|
636 "Return a list of all `face' text properties in the current buffer.
|
|
|
637 Each element of the list is of the form (VALUE START1 END1 START2 END2 ...)
|
|
98
|
638 where VALUE is a `face' property value and STARTx and ENDx are positions."
|
|
0
|
639 (save-restriction
|
|
|
640 (widen)
|
|
98
|
641 (let ((start (text-property-not-all (point-min) (point-max) 'face nil))
|
|
100
|
642 end properties value cell)
|
|
98
|
643 (while start
|
|
100
|
644 (setq end (next-single-property-change start 'face nil (point-max))
|
|
98
|
645 value (get-text-property start 'face))
|
|
|
646 ;; Make, or add to existing, list of regions with same `face'.
|
|
|
647 (cond ((setq cell (assoc value properties))
|
|
|
648 (setcdr cell (cons start (cons end (cdr cell)))))
|
|
|
649 ((fast-lock-save-facep value)
|
|
|
650 (push (list value start end) properties)))
|
|
100
|
651 (setq start (text-property-not-all end (point-max) 'face nil)))
|
|
0
|
652 properties)))
|
|
|
653
|
|
|
654 (defun fast-lock-set-face-properties (properties)
|
|
|
655 "Set all `face' text properties to PROPERTIES in the current buffer.
|
|
2
|
656 Any existing `face' text properties are removed first.
|
|
0
|
657 See `fast-lock-get-face-properties' for the format of PROPERTIES."
|
|
2
|
658 (save-buffer-state (plist regions)
|
|
|
659 (save-restriction
|
|
|
660 (widen)
|
|
|
661 (font-lock-unfontify-region (point-min) (point-max))
|
|
|
662 (while properties
|
|
|
663 (setq plist (list 'face (car (car properties)))
|
|
|
664 regions (cdr (car properties))
|
|
|
665 properties (cdr properties))
|
|
0
|
666 ;; Set the `face' property for each start/end region.
|
|
|
667 (while regions
|
|
|
668 (set-text-properties (nth 0 regions) (nth 1 regions) plist)
|
|
2
|
669 (setq regions (nthcdr 2 regions)))))))
|
|
100
|
670
|
|
0
|
671 ;; Functions for XEmacs:
|
|
|
672
|
|
2
|
673 (when (save-match-data (string-match "XEmacs" (emacs-version)))
|
|
|
674 ;;
|
|
|
675 ;; It would be better to use XEmacs' `map-extents' over extents with a
|
|
|
676 ;; `font-lock' property, but `face' properties are on different extents.
|
|
|
677 (defun fast-lock-get-face-properties ()
|
|
|
678 "Return a list of all `face' text properties in the current buffer.
|
|
0
|
679 Each element of the list is of the form (VALUE START1 END1 START2 END2 ...)
|
|
|
680 where VALUE is a `face' property value and STARTx and ENDx are positions.
|
|
|
681 Only those `face' VALUEs in `fast-lock-save-faces' are returned."
|
|
2
|
682 (save-restriction
|
|
|
683 (widen)
|
|
|
684 (let ((properties ()) cell)
|
|
|
685 (map-extents
|
|
|
686 (function (lambda (extent ignore)
|
|
|
687 (let ((value (extent-face extent)))
|
|
|
688 ;; We're only interested if it's one of `fast-lock-save-faces'.
|
|
98
|
689 (when (and value (fast-lock-save-facep value))
|
|
2
|
690 (let ((start (extent-start-position extent))
|
|
|
691 (end (extent-end-position extent)))
|
|
|
692 ;; Make or add to existing list of regions with the same
|
|
|
693 ;; `face' property value.
|
|
98
|
694 (if (setq cell (assoc value properties))
|
|
2
|
695 (setcdr cell (cons start (cons end (cdr cell))))
|
|
|
696 (push (list value start end) properties))))
|
|
|
697 ;; Return nil to keep `map-extents' going.
|
|
|
698 nil))))
|
|
|
699 properties)))
|
|
|
700 ;;
|
|
|
701 ;; Make extents just like XEmacs' font-lock.el does.
|
|
|
702 (defun fast-lock-set-face-properties (properties)
|
|
|
703 "Set all `face' text properties to PROPERTIES in the current buffer.
|
|
0
|
704 Any existing `face' text properties are removed first.
|
|
|
705 See `fast-lock-get-face-properties' for the format of PROPERTIES."
|
|
2
|
706 (save-restriction
|
|
|
707 (widen)
|
|
|
708 (font-lock-unfontify-region (point-min) (point-max))
|
|
|
709 (while properties
|
|
|
710 (let ((face (car (car properties)))
|
|
|
711 (regions (cdr (car properties))))
|
|
|
712 ;; Set the `face' property, etc., for each start/end region.
|
|
|
713 (while regions
|
|
|
714 (font-lock-set-face (nth 0 regions) (nth 1 regions) face)
|
|
|
715 (setq regions (nthcdr 2 regions)))
|
|
|
716 (setq properties (cdr properties))))))
|
|
|
717 ;;
|
|
|
718 ;; XEmacs 19.12 font-lock.el's `font-lock-fontify-buffer' runs a hook.
|
|
|
719 (add-hook 'font-lock-after-fontify-buffer-hook
|
|
|
720 'fast-lock-after-fontify-buffer))
|
|
0
|
721
|
|
2
|
722 (unless (boundp 'font-lock-inhibit-thing-lock)
|
|
|
723 (defvar font-lock-inhibit-thing-lock nil
|
|
|
724 "List of Font Lock mode related modes that should not be turned on."))
|
|
0
|
725
|
|
2
|
726 (unless (fboundp 'font-lock-value-in-major-mode)
|
|
|
727 (defun font-lock-value-in-major-mode (alist)
|
|
|
728 ;; Return value in ALIST for `major-mode'.
|
|
|
729 (if (consp alist)
|
|
|
730 (cdr (or (assq major-mode alist) (assq t alist)))
|
|
|
731 alist)))
|
|
|
732
|
|
|
733 (unless (fboundp 'font-lock-compile-keywords)
|
|
|
734 (defalias 'font-lock-compile-keywords 'identity))
|
|
100
|
735
|
|
0
|
736 ;; Install ourselves:
|
|
|
737
|
|
2
|
738 (add-hook 'after-save-hook 'fast-lock-save-cache-after-save-file)
|
|
|
739 (add-hook 'kill-buffer-hook 'fast-lock-save-cache-before-kill-buffer)
|
|
|
740 (add-hook 'kill-emacs-hook 'fast-lock-save-caches-before-kill-emacs)
|
|
0
|
741
|
|
|
742 ;;;###autoload
|
|
100
|
743 (when (fboundp 'add-minor-mode)
|
|
|
744 (defvar fast-lock-mode nil)
|
|
|
745 (add-minor-mode 'fast-lock-mode nil))
|
|
2
|
746 ;;;###dont-autoload
|
|
|
747 (unless (assq 'fast-lock-mode minor-mode-alist)
|
|
|
748 (setq minor-mode-alist (append minor-mode-alist '((fast-lock-mode nil)))))
|
|
0
|
749
|
|
|
750 ;; Provide ourselves:
|
|
|
751
|
|
|
752 (provide 'fast-lock)
|
|
|
753
|
|
|
754 ;;; fast-lock.el ends here
|
