Mercurial > octave-nkf

annotate scripts/help/help.m @ 9133:c0cef1436788

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Update help text for sections 2.2 and 2.3 of basics.txi
author Rik <rdrider0-list@yahoo.com>
date Fri, 17 Apr 2009 15:16:33 -0700
parents e0fbf17a17bb
children f22bbc5d56e9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
1 ## Copyright (C) 2009 S�ren Hauberg
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
2 ##
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
3 ## This program is free software; you can redistribute it and/or modify it
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
4 ## under the terms of the GNU General Public License as published by
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
5 ## the Free Software Foundation; either version 3 of the License, or (at
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
6 ## your option) any later version.
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
7 ##
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
8 ## This program is distributed in the hope that it will be useful, but
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
9 ## WITHOUT ANY WARRANTY; without even the implied warranty of
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
11 ## General Public License for more details.
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
12 ##
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
13 ## You should have received a copy of the GNU General Public License
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
14 ## along with this program; see the file COPYING. If not, see
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
15 ## <http://www.gnu.org/licenses/>.
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
16
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
17 ## -*- texinfo -*-
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
18 ## @deftypefn {Command} help @var{name}
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
19 ## Display the help text for @var{name}.
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
20 ## If invoked without any arguments, @code{help} prints a list
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
21 ## of all the available operators and functions.
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
22 ##
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
23 ## For example, the command @kbd{help help} prints a short message
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
24 ## describing the @code{help} command.
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
25 ##
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
26 ## The help command can give you information about operators, but not the
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
27 ## comma and semicolons that are used as command separators. To get help
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
28 ## for those, you must type @kbd{help comma} or @kbd{help semicolon}.
9133
c0cef1436788 Update help text for sections 2.2 and 2.3 of basics.txi
Rik <rdrider0-list@yahoo.com>
parents: 8768
diff changeset
29 ## @seealso{doc, lookfor, which}
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
30 ## @end deftypefn
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
31
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
32 function help (name)
8748
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
33
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
34 if (nargin == 0)
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
35
8748
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
36 puts ("\n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
37 For help with individual commands and functions type\n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
38 \n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
39 help NAME\n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
40 \n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
41 (replace NAME with the name of the command or function you would\n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
42 like to learn more about).\n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
43 \n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
44 For a more detailed introduction to GNU Octave, please consult the\n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
45 manual. To read the manual from the prompt type\n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
46 \n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
47 doc\n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
48 \n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
49 GNU Octave is supported and developed by its user community.\n\
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
50 For more information visit http://www.octave.org.\n\n");
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
51
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
52 elseif (nargin == 1 && ischar (name))
8748
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
53
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
54 ## Get help text
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
55 [text, format] = get_help_text (name);
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
56
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
57 ## Take action depending on help text format
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
58 switch (lower (format))
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
59 case "plain text"
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
60 status = 0;
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
61 case "texinfo"
8768
e0fbf17a17bb __makeinfo__.m: rename from makeinfo.m
John W. Eaton <jwe@octave.org>
parents: 8748
diff changeset
62 [text, status] = __makeinfo__ (text, "plain text");
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
63 case "html"
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
64 [text, status] = strip_html_tags (text);
8631
52956d669506 Display sensible error message when the help text of an undocumented function is requested
Soren Hauberg <hauberg@gmail.com>
parents: 8630
diff changeset
65 case "not documented"
52956d669506 Display sensible error message when the help text of an undocumented function is requested
Soren Hauberg <hauberg@gmail.com>
parents: 8630
diff changeset
66 error ("help: `%s' is not documented\n", name);
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
67 case "not found"
8630
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
68 [text, status] = do_contents (name);
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
69 if (status != 0)
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
70 error ("help: `%s' not found\n", name);
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
71 endif
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
72 otherwise
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
73 error ("help: internal error: unsupported help text format: '%s'\n", format);
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
74 endswitch
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
75
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
76 ## Print text
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
77 if (status != 0)
8768
e0fbf17a17bb __makeinfo__.m: rename from makeinfo.m
John W. Eaton <jwe@octave.org>
parents: 8748
diff changeset
78 warning ("help: Texinfo formatting filter exited abnormally; raw Texinfo source of help text follows...\n");
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
79 endif
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
80
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
81 which (name);
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
82 printf ("\n%s\n%s", text, __additional_help_message__ ());
8748
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
83
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
84 else
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
85 error ("help: invalid input\n");
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
86 endif
8748
d1eed318100f help.m: shorten default help text
John W. Eaton <jwe@octave.org>
parents: 8746
diff changeset
87
8575
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
88 endfunction
f134925a1cfa m-file implementation of help system
Soren Hauberg <soren@hauberg.org>
parents:
diff changeset
89
8630
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
90 function [text, status] = do_contents (name)
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
91 text = "";
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
92 status = 1;
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
93
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
94 d = find_dir_in_path (name);
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
95 if (!isempty (d))
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
96 p = path ();
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
97 unwind_protect
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
98 ## Only include 'd' in the path, and then get the help text of 'Contents'
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
99 path (d);
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
100 [text, format] = get_help_text ("Contents");
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
101
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
102 ## Take action depending on help text format
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
103 switch (lower (format))
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
104 case "plain text"
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
105 status = 0;
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
106 case "texinfo"
8768
e0fbf17a17bb __makeinfo__.m: rename from makeinfo.m
John W. Eaton <jwe@octave.org>
parents: 8748
diff changeset
107 [text, status] = __makeinfo__ (text, "plain text");
8630
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
108 case "html"
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
109 [text, status] = strip_html_tags (text);
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
110 endswitch
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
111 unwind_protect_cleanup
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
112 ## Restore path
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
113 path (p);
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
114 end_unwind_protect
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
115 endif
540165304f00 Allow displaying 'Contents.m' files.
Soren Hauberg <hauberg@gmail.com>
parents: 8575
diff changeset
116 endfunction