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annotate scripts/help/__makeinfo__.m @ 16659:608e307b4914 ss-3-7-5

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snapshot 3.7.5 * configure.ac (OCTAVE_VERSION): Bump to 3.7.5.
author John W. Eaton <jwe@octave.org>
date Tue, 14 May 2013 05:23:45 -0400
parents edce7d75597b
children 333243133364
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1 ## Copyright (C) 2009-2012 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} {[@var{retval}, @var{status}] =} __makeinfo__ (@var{text}, @var{output_type})
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21 ## @deftypefnx {Function File} {[@var{retval}, @var{status}] =} __makeinfo__ (@var{text}, @var{output_type}, @var{see_also})
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22 ## Undocumented internal function.
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23 ## @end deftypefn
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24
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25 ## Run @code{makeinfo} on a given text.
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26 ##
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27 ## The string @var{text} is run through the @code{__makeinfo__} program
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28 ## to generate output in various formats. This string must contain valid
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29 ## Texinfo formatted text.
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30 ##
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31 ## The @var{output_type} selects the format of the output. This can be either
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32 ## @t{"html"}, @t{"texinfo"}, or @t{"plain text"}. By default this is
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33 ## @t{"plain text"}. If @var{output_type} is @t{"texinfo"}, the @t{@@seealso}
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34 ## macro is expanded, but otherwise the text is unaltered.
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35 ##
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36 ## If the optional argument @var{see_also} is present, it is used to expand the
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37 ## Octave specific @t{@@seealso} macro. This argument must be a function handle,
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38 ## that accepts a cell array of strings as input argument (each elements of the
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39 ## array corresponds to the arguments to the @t{@@seealso} macro), and return
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40 ## the expanded string. If this argument is not given, the @t{@@seealso} macro
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41 ## will be expanded to the text
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42 ##
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43 ## @example
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44 ## See also: arg1, arg2, ...
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45 ## @end example
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46 ##
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47 ## @noindent
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48 ## for @t{"plain text"} output, and
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49 ##
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50 ## @example
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51 ## See also: @@ref@{arg1@}, @@ref@{arg2@}, ...
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52 ## @end example
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53 ##
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54 ## @noindent
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55 ## otherwise.
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56 ##
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57 ## The optional output argument @var{status} contains the exit status of the
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58 ## @code{makeinfo} program as returned by @code{system}.
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59
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60 function [retval, status] = __makeinfo__ (text, output_type = "plain text", fsee_also)
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61
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62 ## Check input
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63 if (nargin < 1 || nargin > 3)
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64 print_usage ();
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65 endif
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66
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67 if (! ischar (text))
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68 error ("__makeinfo__: first input argument must be a string");
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69 endif
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70
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71 if (! ischar (output_type))
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72 error ("__makeinfo__: second input argument must be a string");
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73 endif
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74
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75 if (nargin < 3)
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76 if (strcmpi (output_type, "plain text"))
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77 fsee_also = @(T) strcat ...
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78 ("\nSee also:", sprintf (" %s,", T{:})(1:end-1), "\n");
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79 else
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80 fsee_also = @(T) strcat ...
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81 ("\nSee also:", sprintf (" @ref{%s},", T{:})(1:end-1), "\n");
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82 endif
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83 endif
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84
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85 if (! isa (fsee_also, "function_handle"))
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86 error ("__makeinfo__: third input argument must be a function handle");
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87 endif
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88
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89 ## Formatting in m-files has an extra space at the beginning of every line.
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90 ## Remove these unwanted spaces if present. First text char is "\n" delim.
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91 if (text(2) == " ")
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92 text = strrep (text, "\n ", "\n");
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93 endif
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94 ## Texinfo crashes if @end tex does not appear first on the line.
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95 text = regexprep (text, '^ +@end tex', '@end tex', 'lineanchors');
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96
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97 file = texi_macros_file ();
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98 fid = fopen (file, "r");
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99 if (fid < 0)
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100 error ("unable to open %s for reading", file);
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101 else
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102 macros_text = fread (fid, Inf, "*char")';
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103 text = cstrcat (macros_text, text);
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104 endif
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105 fclose (fid);
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106
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107 if (strcmpi (output_type, "texinfo"))
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108 status = 0;
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109 retval = text;
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110 return;
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111 endif
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112
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113 ## Create the final TeXinfo input string
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114 text = sprintf ("\\input texinfo\n\n%s\n\n@bye\n", text);
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115
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116 unwind_protect
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117 ## Write Texinfo to tmp file
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118 template = "octave-help-XXXXXX";
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119 [fid, name] = mkstemp (fullfile (tempdir, template), true);
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120 if (fid < 0)
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121 error ("__makeinfo__: could not create temporary file");
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122 endif
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123 fwrite (fid, text);
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124 fclose (fid);
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125
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126 ## Take action depending on output type
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127 switch (lower (output_type))
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128 case "plain text"
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129 cmd = sprintf ("%s --no-headers --no-warn --force --no-validate %s",
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130 makeinfo_program (), name);
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131 case "html"
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132 cmd = sprintf ("%s --no-headers --html --no-warn --no-validate --force %s",
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133 makeinfo_program (), name);
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134 otherwise
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135 error ("__makeinfo__: unsupported output type: '%s'", output_type);
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136 endswitch
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137
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138 ## Call makeinfo
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139 [status, retval] = system (cmd);
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140
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141 unwind_protect_cleanup
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142 if (exist (name, "file"))
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143 delete (name);
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144 endif
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145 end_unwind_protect
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146 endfunction
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147
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148
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149 ## No test needed for internal helper function.
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150 %!assert (1)
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151