Provided by: tcllib_1.21+dfsg-1_all 
NAME
tepam::doc_gen - TEPAM DOC Generation, reference manual
SYNOPSIS
package require Tcl 8.3
package require tepam 0.5
package require tepam::doc_gen ?0.1?
tepam::doc_gen::generate ?-format format? ?-style style? ?-header_footer? ?-dest_file
dest_file? name
tepam::doc_gen::patch ?-format format? ?-style style? ?-search_pattern search_pattern?
?-src_string src_string | -src_file src_file? ?-dest_file dest_file? ?name?
_________________________________________________________________________________________________
DESCRIPTION
This package generates documentations of TEPAM procedures (procedures that have been
declared with tepam::procedure). The documents are generated in the classic UNIX document
style using the following document sections: Name, Synopsis, Description, Arguments and
Example. TEPAM Doc Gen provides support for various document formats. Support for
additional formats can be added if necessary.
The TEPAM Doc Gen package provides the following commands:
tepam::doc_gen::generate ?-format format? ?-style style? ?-header_footer? ?-dest_file
dest_file? name
This command generates the documentation for a specified procedure (name) in one of
the supported formats (TXT, HTML, POD (Perl Doc), DT (TclLib DocTool), or in a
custom specific format. The format is specified via ?format?. The flag
?-header_footer? adds to the documentation file header and footer. If ?dest_file?
is specified the documentation is stored in a file (the file header and footer are
added automatically in this case) and the file name is returned. Otherwise the
documentation string is returned by generate.
tepam::doc_gen::patch ?-format format? ?-style style? ?-search_pattern search_pattern?
?-src_string src_string | -src_file src_file? ?-dest_file dest_file? ?name?
This command inserts procedure documentations into an existing master document at
the locations indicated by insertion placeholders which are matching the pattern of
?search_pattern?. The existing master document is either provided as data to the
argument (?src_string?) or via a file (?src_file?). The final document is returned
by patch if no destination file is defined (?dest_file?). Otherwise, the document
is stored in the specified file, and the number of insertion placeholders that
could be handled successfully is returned.
Any insertion placeholders of the master document are handled by default. By
defining the argument ?name? the documentation insertion will be restricted to a
particular procedure.
ARGUMENTS
?-format format?
Specifies the documentation format. TEPAM Doc Gen provides support for the
following formats:
• TXT - Text format (default)
• HTML
• POD - Perl Plain Old Documentation format (PerlPOD)
• DT - TclLib DocTool format
Section ADDING SUPPORT FOR NEW DOCUMENT FORMATS shows how support for additional
formats can be added.
?-style style?
The documentation is by default generated in Tcl style (e.g. command arg1 arg2
...). C-style documentation can be generated by setting this argument to 'C' (e.g.
command(arg1,arg2,...)).
?-dest_file dest_file?
If ?dest_file? is defined the documentation is written into the specified
destination file. Otherwise the documentation string is returned by the commands
generate and patch.
name / ?name?
This is the name of the procedure for which the documentation has to be generated.
This is a mandatory argument for generate, but an optional argument for patch.
?-header_footer?
Generate adds to the generated procedure documentation the file header and footer
only if a file is generated. By selecting the flag ?-header_footer? the header and
footer are also generated if the documentation is returned as string by generate.
?-src_string src_string | -src_file src_file?
Patch inserts procedure documentations into an existing document that is either
provided as string to the argument (?src_string?) or as a file (?src_file?). One of
these two arguments need to be specified.
?-search_pattern search_pattern?
The argument ?search_pattern? defines the documentation insertion placeholder used
in a document. It is a regular expression accepted by regexp and needs to contain a
parenthesized sub-expression that contains the procedure name for which the
documentation needs to be inserted.
The default insertion placeholder pattern is \{!(.*?)!\}, which means that the
procedure name will be embedded between {! and !}. The section EXAMPLES contains a
custom insertion placeholder pattern example.
PREDEFINED DOCUMENT FORMATS
TEPAM Doc Gen pre-defines the following document formats:
TXT - TEXT FORMAT
The documentation will be generated in a simple text format if this format is selected.
The format can be customized via the following variable:
tepam::doc_gen::Option(TXT,MaxLineLength)
Default: 80
This variable defines the line wrapping limit (character position).
HTML - HTML FORMAT
TEPAM Doc Gen generates CSS styled HTML files. The HTML documentation can be customized
via the following variable:
tepam::doc_gen::Option(HTML,CssFile)
Default: "tepam_doc_stylesheet.css"
This variable specifies the CSS stylesheet file that is referred by the generated
HTML files.
The CSS stylesheet can be customized to change the documentation formatting. A good
starting point to create a customized CSS stylesheet is to use the CSS file provided by
the TEPAM Doc Gen example/demo. The HTML documentation uses the following CSS class
styles:
• h1.tepam_page_title - Document page title. Only used by generate if a file is
created or if the header and footer are built (flag ?-header_footer? selected).
• div.tepam_command_help - Documentation container. The entire procedure
documentation is placed inside this container.
• p.tepam_section_title - Section title (e.g. Name, Synopsis, Description, ...)
• p.tepam_sub_section_title - Sub-section title (used to separate the documentation
of multiple sub-procedures)
• p.tepam_name - Name section
• p.tepam_synopsis - Synopsis section
• p.tepam_description - Single description paragraph
• ul.tepam_description_list - Item of a HTML bulleted/unordered list inside the
description section
• dt.tepam_argument - Item of a HTML description list used to list the procedure
arguments
• p.tepam_argument_description - Argument description paragraph
• p.tepam_argument_attribute - Argument attribute line
• pre.tepam_example - Example section
POD - PERL DOCUMENT FORMAT
The documentation is generated in the Perl Plain Old Documentation format (PerlPOD) if
this format is selected.
DT - TCLLIB DOCTOOLS FORMAT
The documentation is generated in the Tcllib DocTools format if this format is selected.
ADDING SUPPORT FOR NEW DOCUMENT FORMATS
Support for a new document format can be added by defining in the tepam::doc_gen namespace
a set of procedures that generate the different document components.
The following documentation listing contains tokens that refer to the different document
generation procedures:
<01>
<03> <20s> NAME<20e>
<30s> message_box - Displays text in a message box<30e>
<20s> SYNOPSYS<20e>
<40s> message_box [-mtype <mtype>] <text><40e>
<20s> DESCRIPTION<20e>
<21s> message_box<21e>
<54s> message_box [-mtype <mtype>] <text><54e>
<50s> This procedure allows displaying a text in an message box. The following
message types are supported:<50e>
<51> <53s> * Info<53e>
<53s> * Warning<53e>
<53s> * Error<53e> <52>
<50s> If the text parameter is use multiple times the different texts are
concatenated to create the message text.<50e>
<20s> ARGUMENTS<20e>
<60> <62s> [-mtype <mtype>]<62e>
<63> <65s> Message type<65e>
<66s> Default: "Warning"<66e>
<66s> Multiple: yes<66e>
<66s> Choices: Info, Warning, Error<66e> <64>
<62s> <text><62e>
<63> <65s> One or multiple text lines to display<65e>
<66s> Type: string<66e>
<66s> Multiple: yes<66e> <64><61>
<20s> EXAMPLE<20e>
<70> <72s> message_box "Please save first the document"<72e>
<73s> -> 1<73e> <71><04>
<02>
There are 2 types of document generation procedures:
Content generation procedures (e.g. <40s>...<40e>)
These procedures generate some document content based on the text that is provided
as procedure argument. The listing above shows two tokens for these procedures to
indicate the beginning and the end of the generated content.
Control generation procedures (e.g. <03>)
These procedures generate control constructs, for example to generate the prolog
code and epilog code for lists, sections, etc. These procedures have no argument.
The following set of procedures needs to be defined to provide support for a new document
format:
01 - gen($Format,Header) {Text}
Only called if doc_gen generates a file or if it is called with the flag
?-header_footer?. The procedure creates the file header. The provided parameter is
the procedure name for which the documentation has to be generated.
02 - gen($Format,Footer) {Text}
Only called if doc_gen generates a file or if it is called with the flag
?-header_footer?. The procedure creates the file footer.
03 - gen($Format,Begin) {}
Generates the documentation prolog (preamble)
04 - gen($Format,End) {}
Generates the documentation epilog
20 - gen($Format,SectionTitle) {Text}
Generates a section title (e.g. Name, Synopsis, Description, ...). The raw title
text is provided as parameter
21 - gen($Format,SubSectionTitle) {Text}
Generates a sub-section title. Sub-sections are used if a single documentation is
generated for multiple sub-commands to make a separation between them. The raw
title text is provided as parameter
30 - gen($Format,Name) {Text}
Generates the name section (without title). The raw section text is provided as
parameter.
40 - gen($Format,Synopsis) {Text}
Generates the synopsis section (without title). The section text provided as
parameter is pre-formatted (the argument strings are generated by
gen($Format,ArgumentString)).
50 - gen($Format,Description) {Text}
Generates a description paragraph. The raw paragraph text is provided as parameter.
51 - gen($Format,DescriptionListBegin) {}
Generates the prolog of a bulleted/unordered list inside the description section.
This prolog is usually the start code of a list structure.
52 - gen($Format,DescriptionListEnd) {}
Generates the epilog of a bulleted/unordered list inside the description section.
This epilog is usually the end code of a list structure.
53 - gen($Format,DescriptionListItem) {Text}
Generates a text item in a bulleted/unordered description list. The raw item text
is provided as parameter.
54 - gen($Format,DescriptionSynopsis) {Text}
Generates the synopsis line on the beginning of the description section. The
command can return an empty string if no synopsys line is required at this place.
Some formats (e.g. Tcl DocTools) require that the synopsis line is defined in the
description section, to build then automatically the synopsis section. The section
text provided as parameter is pre-formatted (the argument strings are generated by
gen($Format,ArgumentString)).
60 - gen($Format,ArgumentListBegin) {}
Generates the prolog of argument list (definition/non-bulleted list). This prolog
is usually the start code of a definition list.
61 - gen($Format,ArgumentListEnd) {}
Generates the epilog of the argument list. This epilog is usually the end string of
a list structure.
62 - gen($Format,ArgumentListItem) {Name IsOptional IsNamed Type}
Generates an argument item line inside the argument list. This command can rely on
gen($Format,ArgumentDetailBegin) since the parameters are identical.
63 - gen($Format,ArgumentDetailBegin) {}
Generates the argument details prolog (preamble).
64 - gen($Format,ArgumentDetailEnd) {}
Generates the argument details epilog
65 - gen($Format,ArgumentDescription) {Text}
Generates the argument description (single paragraph).
66 - gen($Format,ArgumentAttribute) {Text}
Generates a single argument attribute string. The command is called individually
for each attribute.
70 - gen($Format,ExampleBegin) {}
Generates the example section prolog (preamble)
71 - gen($Format,ExampleEnd) {}
Generates the example section epilog
72 - gen($Format,ExampleCommandLine) {Text}
Generates a single command line in the example section. The command is called for
each individual command line.
73 - gen($Format,ExampleResultLine) {Text}
Generates a command result line
80 - gen($Format,ArgumentString) {Name IsOptional IsNamed Type}
Generates the part of the command line or the synopsis that is specific to an
argument. The generated string has to indicate if an argument is optional, named
and if it is a flag.
The following parameters are provided to this procedure:
Name Name of the argument
IsOptional
If true (=1) the argument is optional which should be indicated by the
generated string (for example by putting the argument into brackets {[]} or
into question marks '?'):
gen(TXT,ArgumentString) mtype 1 0 string -> "[mtype]"
IsNamed
If true (=1) an argument is a named argument (option). The generated string
should in this case contain the argument/option name, followed by the
argument itself:
gen(TXT,ArgumentString) mtype 0 1 string -> "-mtype <mtype>"
Named arguments can also be optional:
gen(TXT,ArgumentString) mtype 1 1 string -> "[-mtype <mtype>]"
Type Indicates the type of the argument. If the type is set to none the argument
is a flag, which needs to be indicated by the generated string. Example:
gen(TXT,ArgumentString) close 1 1 none -> "[-close]"
EXAMPLES
TEPAM::DOC_GEN::GENERATE
The TEPAM Doc Gen package can be explored by generating the documentation of the command
tepam::doc_gen::generate. The following example generates the document in text format
(default format):
tepam::doc_gen::generate tepam::doc_gen::generate
The next example generates the documentation in HTML format:
tepam::doc_gen::generate -format HTML tepam::doc_gen::generate
The flag ?header_footer? adds also the file header and footer:
tepam::doc_gen::generate -format HTML -header_footer tepam::doc_gen::generate
The documentation can directly be stored in a file. The file header and footer are
automatically generated in this way:
tepam::doc_gen::generate -format HTML -dest_file doc_gen.html tepam::doc_gen::generate
The generated HTML file refers a CSS stylesheet file (default: tepam_doc_stylesheet.css).
To display the HTML file correctly this CSS stylesheet file needs to be copied into the
directory of the generated HTML file.
The Tcl DOC Tools format can be used as intermediate format to generate other formats, for
example HTML:
# Generate the documentation in Tcl Doc Tool format
set dt [tepam::doc_gen::generate -format DT -header_footer tepam::doc_gen::generate]
# Create a new doc tools object (HTML format)
package require doctools
::doctools::new myDoc -format html
# Open the HTML file, and write the HTML formatted documentation
set fHtml [open doc_gen.dt.html w]
puts $fHtml [myDoc format $dt]
close $fHtml
TEPAM::DOC_GEN::PATCH
While generate provides a limited number of possibilities to vary the document structure,
patch offers more flexibility. Multiple documentations for different procedures and meta
information can for example be added.
The following listing shows how the patch command works. It defines first a HTML master
document string that contains 2 procedure documentation placeholders
({*<ProcedureName>*}). There placeholders are replaced by patch with the generated
documentation of the referred procedures. Since nonstandard placeholders are used, patch
is called with an explicit placeholder pattern definition (argument search_pattern).
# Define the HTML master document
set HtmlMasterDoc {\
<html>
<head>
<title>tepam::doc_gen</title>
<link rel="stylesheet" href="tepam_doc_stylesheet.css">
<meta content="documentation" name="keywords"></meta>
</head>
<body>
<h1>tepam::doc_gen</h1>
<h2>Generate</h2>
{*tepam::doc_gen::generate*}
<h2>Patch</h2>
{*tepam::doc_gen::patch*}
</body>
<html>\
}
# Patch the master document: This will replace the placeholders by the
# procedure documentation divisions:
tepam::doc_gen::patch -format HTML -search_pattern {\{\*(.*?)\*\}} \
-src_string $HtmlMasterDoc -dest_file tepam_doc_gen.html
SEE ALSO
tepam(3tcl), tepam::procedure(3tcl)
KEYWORDS
automatic documentation, documentation, procedure documentation
CATEGORY
Documentation tools
COPYRIGHT
Copyright (c) 2013, Andreas Drollinger