Ubuntu Manpage: doctools::toc::export::nroff

NAME

       doctools::toc::export::nroff - nroff export plugin

SYNOPSIS

       package require Tcl  8.4

       package require doctools::toc::export::nroff  ?0.2?

       package require doctools::text

       package require doctools::nroff::man_macros

       export serial configuration

_________________________________________________________________________________________________

DESCRIPTION

       This package implements the doctools table of contents export plugin for the generation of
       nroff markup.

       This is an internal package of doctools, for use by the higher level  management  packages
       handling tables of contents, especially doctools::toc::export, the export manager.

       Using it from a regular interpreter is possible, however only with contortions, and is not
       recommended.   The  proper  way  to  use  this  functionality  is  through   the   package
       doctools::toc::export and the export manager objects it provides.

API

       The  API  provided by this package satisfies the specification of the doctoc export plugin
       API version 2.

       export serial configuration
              This command takes the canonical serialization of a table of contents, as specified
              in  section ToC serialization format, and contained in serial, the configuration, a
              dictionary, and generates nroff markup encoding the table.  The created  string  is
              then returned as the result of the command.

CONFIGURATION

       The  nroff  export plugin recognizes the following configuration variables and changes its
       behaviour as they specify.

       string user
              This standard configuration variable contains the name  of  the  user  running  the
              process which invoked the export plugin.  The plugin puts this information into the
              provenance comment at the beginning of the generated document.

       string file
              This standard configuration variable contains the name of the  file  the  table  of
              contents  came from. This variable may not be set or contain the empty string.  The
              plugin puts this information, if defined, i.e. set and not the empty  string,  into
              the provenance comment at the beginning of the generated document.

       boolean inline
              If  this  flag  is  set  (default) the plugin will place the definitions of the man
              macro set directly into the output.

              If this flag is not set, the plugin will place a reference to  the  definitions  of
              the man macro set into the output, but not the macro definitions themselves.

       Note  that  this  plugin ignores the standard configuration variables format, and map, and
       their values.

TOC SERIALIZATION FORMAT

Here we specify the format used by the doctools v2 packages to serialize tables of
contents as immutable values for transport, comparison, etc.

We distinguish between regular and canonical serializations. While a table of contents
may have more than one regular serialization only exactly one of them will be canonical.

regular serialization

[1] The serialization of any table of contents is a nested Tcl dictionary.

[2] This dictionary holds a single key, doctools::toc, and its value. This value
holds the contents of the table of contents.

[3] The contents of the table of contents are a Tcl dictionary holding the title
of the table of contents, a label, and its elements. The relevant keys and
their values are

title The value is a string containing the title of the table of contents.

label The value is a string containing a label for the table of contents.

items The value is a Tcl list holding the elements of the table, in the
order they are to be shown.

Each element is a Tcl list holding the type of the item, and its
description, in this order. An alternative description would be that
it is a Tcl dictionary holding a single key, the item type, mapped to
the item description.

The two legal item types and their descriptions are

reference
This item describes a single entry in the table of contents,
referencing a single document. To this end its value is a Tcl
dictionary containing an id for the referenced document, a
label, and a longer textual description which can be
associated with the entry. The relevant keys and their values
are

id The value is a string containing the id of the document
associated with the entry.

label The value is a string containing a label for this
entry. This string also identifies the entry, and no
two entries (references and divisions) in the
containing list are allowed to have the same label.

desc The value is a string containing a longer description
for this entry.

division
This item describes a group of entries in the table of
contents, inducing a hierarchy of entries. To this end its
value is a Tcl dictionary containing a label for the group, an
optional id to a document for the whole group, and the list of
entries in the group. The relevant keys and their values are

id The value is a string containing the id of the document
associated with the whole group. This key is optional.

label The value is a string containing a label for the group.
This string also identifies the entry, and no two
entries (references and divisions) in the containing
list are allowed to have the same label.

items The value is a Tcl list holding the elements of the
group, in the order they are to be shown. This list
has the same structure as the value for the keyword
items used to describe the whole table of contents, see
above. This closes the recusrive definition of the
structure, with divisions holding the same type of
elements as the whole table of contents, including
other divisions.

canonical serialization
The canonical serialization of a table of contents has the format as specified in
the previous item, and then additionally satisfies the constraints below, which
make it unique among all the possible serializations of this table of contents.

[1] The keys found in all the nested Tcl dictionaries are sorted in ascending
dictionary order, as generated by Tcl's builtin command lsort -increasing
-dict.

BUGS, IDEAS, FEEDBACK

       This document, and the package it describes,  will  undoubtedly  contain  bugs  and  other
       problems.    Please   report  such  in  the  category  doctools  of  the  Tcllib  Trackers
       [http://core.tcl.tk/tcllib/reportlist].  Please also report any ideas for enhancements you
       may have for either package and/or documentation.

       When proposing code changes, please provide unified diffs, i.e the output of diff -u.

       Note further that attachments are strongly preferred over inlined patches. Attachments can
       be made by going to the Edit form of the ticket immediately after its creation,  and  then
       using the left-most button in the secondary navigation bar.

KEYWORDS

       doctools, export, nroff, serialization, table of contents, toc

COPYRIGHT

       Copyright (c) 2009-2019 Andreas Kupries <andreas_kupries@users.sourceforge.net>