doctools::toc::export::nroff(3Documentation doctools::toc::export::nroff(3tcl)
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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
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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 doc-
tools::toc::export, the export manager.
Using it from a regular interpreter is possible, however only with con-
tortions, and is not recommended. The proper way to use this function-
ality is through the package doctools::toc::export and the export man-
ager 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 gener-
ates 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 vari-
ables 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 informa-
tion, 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 defini-
tions 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 for-
mat, and map, and their values.
TOC SERIALIZATION FORMAT
Here we specify the format used by the doctools v2 packages to serial-
ize 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 ex-
actly 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 dictio-
nary 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 al-
ternative 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 refer-
enced document, a label, and a longer tex-
tual 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 divi-
sions) 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 op-
tional.
label The value is a string containing a
label for the group. This string
also identifies the entry, and no
two entries (references and divi-
sions) 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 con-
tents, including other divisions.
canonical serialization
The canonical serialization of a table of contents has the for-
mat 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 out-
put 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
CATEGORY
Text formatter plugin
COPYRIGHT
Copyright (c) 2009-2019 Andreas Kupries <andreas_kupries@users.sourceforge.net>
tcllib 0.2 doctools::toc::export::nroff(3tcl)