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annotate scripts/help/gen_doc_cache.m @ 11523:fd0a3ac60b0e

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update copyright notices
author John W. Eaton <jwe@octave.org>
date Fri, 14 Jan 2011 05:47:45 -0500
parents 1740012184f9
children c792872f8942
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1 ## Copyright (C) 2009-2011 S�ren Hauberg
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} gen_doc_cache (@var{out_file}, @var{directory})
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21 ## Generate documentation caches for all functions in a given directory.
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22 ##
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23 ## A documentation cache is generated for all functions in @var{directory}.
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24 ## The
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25 ## resulting cache is saved in the file @var{out_file}.
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26 ## The cache is used to speed up @code{lookfor}.
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27 ##
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28 ## If no directory is given (or it is the empty matrix), a cache for builtin
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29 ## operators, etc. is generated.
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30 ##
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31 ## @seealso{lookfor, path}
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32 ## @end deftypefn
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33
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34 function gen_doc_cache (out_file = "doc-cache", directory = [])
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35 ## Check input
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36 if (!ischar (out_file))
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37 print_usage ();
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38 endif
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39
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40 ## Generate cache
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41 if (isempty (directory))
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42 cache = gen_builtin_cache ();
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43 elseif (ischar (directory))
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44 cache = gen_doc_cache_in_dir (directory);
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45 else
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46 error ("gen_doc_cache: second input argument must be a string");
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47 endif
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48
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49 ## Save cache
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50 if (! isempty (cache))
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51 save ("-text", out_file, "cache");
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52 endif
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53 endfunction
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54
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55 function [text, first_sentence, status] = handle_function (f, text, format)
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56 first_sentence = "";
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57 ## Skip functions that start with __ as these shouldn't be searched by lookfor
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58 if (length (f) > 2 && all (f (1:2) == "_"))
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59 status = 1;
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60 return;
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61 endif
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62
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63 ## Take action depending on help text format
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64 switch (lower (format))
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65 case "plain text"
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66 status = 0;
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67 case "texinfo"
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68 [text, status] = __makeinfo__ (text, "plain text");
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69 case "html"
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70 [text, status] = strip_html_tags (text);
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71 otherwise
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72 status = 1;
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73 endswitch
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74
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75 ## Did we get the help text?
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76 if (status != 0 || isempty (text))
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77 warning ("gen_doc_cache: unusable help text in '%s'. Ignoring function.", f);
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78 return;
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79 endif
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80
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81 ## Get first sentence of help text
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82 first_sentence = get_first_help_sentence (f);
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83 endfunction
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84
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85 function cache = create_cache (list)
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86 cache = {};
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87
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88 ## For each function:
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89 for n = 1:length (list)
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90 f = list {n};
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91
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92 ## Get help text
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93 [text, format] = get_help_text (f);
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94
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95 [text, first_sentence, status] = handle_function (f, text, format);
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96
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97 ## Did we get the help text?
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98 if (status != 0)
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99 continue;
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100 endif
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101
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102 ## Store the help text
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103 cache (1, end+1) = f;
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104 cache (2, end) = text;
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105 cache (3, end) = first_sentence;
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106 endfor
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107 endfunction
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108
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109 function cache = gen_doc_cache_in_dir (directory)
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110 ## If 'directory' is not in the current path, add it so we search it
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111 dir_in_path = false;
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112 p = path ();
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113 idx = find (p == pathsep ());
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114 prev_idx = 1;
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115 for n = 1:length (idx)
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116 f = p (prev_idx:idx (n)-1);
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117 if (strcmp (f, directory))
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118 dir_in_path = true;
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119 break;
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120 endif
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121 prev_idx = idx (n) + 1;
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122 endfor
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123
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124 if (!dir_in_path)
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125 addpath (directory);
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126 endif
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127
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128 ## Get list of functions in directory and create cache
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129 list = __list_functions__ (directory);
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130 cache = create_cache (list);
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131
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132 if (!dir_in_path)
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133 rmpath (directory);
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134 endif
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135 endfunction
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136
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137 function cache = gen_builtin_cache ()
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138 operators = __operators__ ();
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139 keywords = __keywords__ ();
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140 builtins = __builtins__ ();
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141 list = {operators{:}, keywords{:}, builtins{:}};
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142
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143 cache = create_cache (list);
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144 endfunction
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
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