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# docidx.tcl --
#
# The docidx export plugin. Generation of docidx markup.
#
# Copyright (c) 2009 Andreas Kupries <andreas_kupries@sourceforge.net>
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# RCS: @(#) $Id: export_docidx.tcl,v 1.3 2009/08/07 18:53:11 andreas_kupries Exp $
# This package is a plugin for the doctools::idx v2 system. It takes
# the list serialization of a keyword index and produces text in
# docidx format.
# ### ### ### ######### ######### #########
## Requisites
# @mdgen NODEP: doctools::idx::export::plugin
package require Tcl 8.4
package require doctools::idx::export::plugin ; # Presence of this
# pseudo package
# indicates execution
# inside of a properly
# initialized plugin
# interpreter.
package require doctools::idx::structure ; # Verification that
# the input is proper.
# ### ### ### ######### ######### #########
## API.
proc export {serial configuration} {
# Phase I. Check that we got a canonical index serialization. That
# makes the unpacking easier, as we can mix it with the
# generation of the output, knowing that everything is
# already sorted as it should be.
::doctools::idx::structure verify-as-canonical $serial
# ### ### ### ######### ######### #########
# Configuration ...
# * Standard entries
# - user = person running the application doing the formatting
# - format = name of this format
# - file = name of the file the index came from. Optional.
# - map = maps symbolic references to actual file path. Optional.
# * docidx specific entries
# - newlines = boolean. tags separated by eol markers
# - indented = boolean. tags indented per the index structure.
# - aligned = boolean. reference information tabular aligned within keys.
#
# Notes
# * This format ignores 'map' even if set, as the written docidx
# contains the symbolic references and only them.
# * aligned => newlines
# * indented => newlines
# Combinations of the format specific entries
# N I A |
# - - - + ---------------------
# 0 0 0 | Ultracompact (no whitespace, single line)
# 1 0 0 | Compact (no whitespace, multiple lines)
# 1 1 0 | Indented
# 1 0 1 | Tabular aligned references
# 1 1 1 | Indented + Tabular aligned references
# - - - + ---------------------
# 0 1 0 | Not possible, per the implications above.
# 0 0 1 | ditto
# 0 1 1 | ditto
# - - - + ---------------------
# Import the configuration and initialize the internal state
array set config {
newlines 0
aligned 0
indented 0
}
array set config $configuration
array set types {
manpage {manpage}
url {url }
}
# Force the implications mentioned in the notes above.
if {
$config(aligned) ||
$config(indented)
} {
set config(newlines) 1
}
# ### ### ### ######### ######### #########
# Phase II. Generate the output, taking the configuration into
# account.
TagsBegin
# First some comments about the provenance of the output.
Tag+ comment [list "Generated @ [clock format [clock seconds]]"]
Tag+ comment [list "By $config(user)"]
if {[info exists config(file)] && ($config(file) ne {})} {
Tag+ comment [list "From file $config(file)"]
}
# Unpack the serialization.
array set idx $serial
array set idx $idx(doctools::idx)
unset idx(doctools::idx)
array set r $idx(references)
# Now open the markup
Tag+ index_begin [list $idx(label) $idx(title)]
# Iterate over the keys and their references
foreach {keyword references} $idx(keywords) {
# Print the key
if {$config(indented)} {TagPrefix { }}
Tag+ key [list $keyword]
# Print the references in the key
if {$config(aligned)} { Align $references max }
if {$config(indented)} {TagPrefix { }}
# Iterate over the references
foreach id $references {
foreach {type label} $r($id) break
if {$config(aligned)} {
set id [FmtR max $id]
set type $types($type)
} else {
set id [list $id]
}
Tag+ $type $id [list $label]
}
}
# Close the index
TagPrefix {}
Tag+ index_end
# Last formatting, joining the commands together.
set sep [expr {$config(newlines) ? "\n" : ""}]
return [join $lines $sep]
# ### ### ### ######### ######### #########
}
# ### ### ### ######### ######### #########
proc TagPrefix {str} {
upvar 1 prefix prefix
set prefix $str
return
}
proc TagsBegin {} {
upvar 1 prefix prefix lines lines
set prefix {}
set lines {}
return
}
proc Tag {n args} {
upvar 1 prefix prefix
set cmd $prefix
append cmd \[$n
if {[llength $args]} { append cmd " [join $args]" }
append cmd \]
return $cmd
}
proc Tag+ {n args} {
upvar 1 prefix prefix lines lines
lappend lines [eval [linsert $args 0 Tag $n]]
return
}
proc Align {references mv} {
upvar 1 $mv max r r
# Generate a list of references sortable by name, and also find the
# max length of all relevant names.
set max 0
foreach id $references {
Max max [list $id]
}
return
}
proc Max {v str} {
upvar 1 $v max
set x [string length $str]
if {$x <= $max} return
set max $x
return
}
proc FmtR {v str} {
upvar 1 $v max
return [list $str][string repeat { } [expr {$max - [string length [list $str]]}]]
}
# ### ### ### ######### ######### #########
## Ready
package provide doctools::idx::export::docidx 0.1
return
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