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annotate scripts/help/gen_doc_cache.m @ 8861:31f864877246

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doc and lookfor fixes
author John W. Eaton <jwe@octave.org>
date Tue, 24 Feb 2009 15:08:39 -0500
parents 257ed585b471
children 34a821854961
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1 ## Copyright (C) 2009 S�ren Hauberg
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2 ##
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3 ## This program is free software; you can redistribute it and/or modify it
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4 ## under the terms of the GNU General Public License as published by
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5 ## the Free Software Foundation; either version 3 of the License, or (at
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6 ## your option) any later version.
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7 ##
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8 ## This program is distributed in the hope that it will be useful, but
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9 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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11 ## General Public License for more details.
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12 ##
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13 ## You should have received a copy of the GNU General Public License
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14 ## along with this program; see the file COPYING. If not, see
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15 ## <http://www.gnu.org/licenses/>.
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16
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17 ## -*- texinfo -*-
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18 ## @deftypefn {Function File} gen_doc_cache (@var{out_file}, @var{directory})
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19 ## Generate documentation caches for all functions in a given directory.
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20 ##
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21 ## A documentation cache is generated for all functions in @var{directory}. The
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22 ## resulting cache is saved in the file @var{out_file}.
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23 ## The cache is used to speed up @code{lookfor}.
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24 ##
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25 ## If no directory is given (or it is the empty matrix), a cache for builtin
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26 ## operators, etc. is generated.
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27 ##
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28 ## @seealso{lookfor, path}
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29 ## @end deftypefn
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30
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31 function gen_doc_cache (out_file = "DOC", directory = [])
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32 ## Check input
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33 if (!ischar (out_file))
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34 print_usage ();
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35 endif
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36
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37 ## Generate cache
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38 if (isempty (directory))
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39 cache = gen_builtin_cache ();
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40 elseif (ischar (directory))
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41 cache = gen_doc_cache_in_dir (directory);
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42 else
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43 error ("gen_doc_cache: second input argument must be a string");
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44 endif
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45
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46 ## Save cache
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47 save ("-text", out_file, "cache");
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48 endfunction
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49
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50 function [text, first_sentence, status] = handle_function (f, text, format)
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51 first_sentence = "";
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52 ## Skip functions that start with __ as these shouldn't be searched by lookfor
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53 if (length (f) > 2 && all (f (1:2) == "_"))
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54 status = 1;
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55 return;
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56 endif
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57
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58 ## Take action depending on help text format
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59 switch (lower (format))
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60 case "plain text"
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61 status = 0;
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62 case "texinfo"
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63 [text, status] = __makeinfo__ (text, "plain text");
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64 case "html"
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65 [text, status] = strip_html_tags (text);
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66 otherwise
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67 status = 1;
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68 endswitch
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69
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70 ## Did we get the help text?
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71 if (status != 0 || isempty (text))
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72 warning ("gen_doc_cache: unusable help text in '%s'. Ignoring function.", f);
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73 return;
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74 endif
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75
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76 ## Get first sentence of help text
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77 first_sentence = get_first_help_sentence (f);
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78 endfunction
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79
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80 function cache = create_cache (list)
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81 cache = {};
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82
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83 ## For each function:
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84 for n = 1:length (list)
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85 f = list {n};
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86
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87 ## Get help text
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88 [text, format] = get_help_text (f);
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89
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90 [text, first_sentence, status] = handle_function (f, text, format);
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91
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92 ## Did we get the help text?
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93 if (status != 0)
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94 continue;
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95 endif
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96
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97 ## Store the help text
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98 cache (1, end+1) = f;
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99 cache (2, end) = text;
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100 cache (3, end) = first_sentence;
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101 endfor
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102 endfunction
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103
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104 function cache = gen_doc_cache_in_dir (directory)
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105 ## If 'directory' is not in the current path, add it so we search it
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106 dir_in_path = false;
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107 p = path ();
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108 idx = find (p == pathsep ());
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109 prev_idx = 1;
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110 for n = 1:length (idx)
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111 f = p (prev_idx:idx (n)-1);
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112 if (strcmp (f, directory))
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113 dir_in_path = true;
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114 break;
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115 endif
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116 prev_idx = idx (n) + 1;
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117 endfor
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118
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119 if (!dir_in_path)
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120 addpath (directory);
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121 endif
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122
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123 ## Get list of functions in directory and create cache
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124 list = __list_functions__ (directory);
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125 cache = create_cache (list);
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126
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127 if (!dir_in_path)
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128 rmpath (directory);
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129 endif
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130 endfunction
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131
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132 function cache = gen_builtin_cache ()
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133 operators = __operators__ ();
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134 keywords = __keywords__ ();
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135 builtins = __builtins__ ();
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136 list = {operators{:}, keywords{:}, builtins{:}};
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137
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138 cache = create_cache (list);
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139 endfunction
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140