'\" '\" Generated from file 'idx_export\&.man' by tcllib/doctools with format 'nroff' '\" Copyright (c) 2009-2019 Andreas Kupries '\" .TH "doctools::idx::export" 3tcl 0\&.2\&.1 tcllib "Documentation tools" .\" The -*- nroff -*- definitions below are for supplemental macros used .\" in Tcl/Tk manual entries. .\" .\" .AP type name in/out ?indent? .\" Start paragraph describing an argument to a library procedure. .\" type is type of argument (int, etc.), in/out is either "in", "out", .\" or "in/out" to describe whether procedure reads or modifies arg, .\" and indent is equivalent to second arg of .IP (shouldn't ever be .\" needed; use .AS below instead) .\" .\" .AS ?type? ?name? .\" Give maximum sizes of arguments for setting tab stops. Type and .\" name are examples of largest possible arguments that will be passed .\" to .AP later. If args are omitted, default tab stops are used. .\" .\" .BS .\" Start box enclosure. From here until next .BE, everything will be .\" enclosed in one large box. .\" .\" .BE .\" End of box enclosure. .\" .\" .CS .\" Begin code excerpt. .\" .\" .CE .\" End code excerpt. .\" .\" .VS ?version? ?br? .\" Begin vertical sidebar, for use in marking newly-changed parts .\" of man pages. The first argument is ignored and used for recording .\" the version when the .VS was added, so that the sidebars can be .\" found and removed when they reach a certain age. If another argument .\" is present, then a line break is forced before starting the sidebar. .\" .\" .VE .\" End of vertical sidebar. .\" .\" .DS .\" Begin an indented unfilled display. .\" .\" .DE .\" End of indented unfilled display. .\" .\" .SO ?manpage? .\" Start of list of standard options for a Tk widget. The manpage .\" argument defines where to look up the standard options; if .\" omitted, defaults to "options". The options follow on successive .\" lines, in three columns separated by tabs. .\" .\" .SE .\" End of list of standard options for a Tk widget. .\" .\" .OP cmdName dbName dbClass .\" Start of description of a specific option. cmdName gives the .\" option's name as specified in the class command, dbName gives .\" the option's name in the option database, and dbClass gives .\" the option's class in the option database. .\" .\" .UL arg1 arg2 .\" Print arg1 underlined, then print arg2 normally. .\" .\" .QW arg1 ?arg2? .\" Print arg1 in quotes, then arg2 normally (for trailing punctuation). .\" .\" .PQ arg1 ?arg2? .\" Print an open parenthesis, arg1 in quotes, then arg2 normally .\" (for trailing punctuation) and then a closing parenthesis. .\" .\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages. .if t .wh -1.3i ^B .nr ^l \n(.l .ad b .\" # Start an argument description .de AP .ie !"\\$4"" .TP \\$4 .el \{\ . ie !"\\$2"" .TP \\n()Cu . el .TP 15 .\} .ta \\n()Au \\n()Bu .ie !"\\$3"" \{\ \&\\$1 \\fI\\$2\\fP (\\$3) .\".b .\} .el \{\ .br .ie !"\\$2"" \{\ \&\\$1 \\fI\\$2\\fP .\} .el \{\ \&\\fI\\$1\\fP .\} .\} .. .\" # define tabbing values for .AP .de AS .nr )A 10n .if !"\\$1"" .nr )A \\w'\\$1'u+3n .nr )B \\n()Au+15n .\" .if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n .nr )C \\n()Bu+\\w'(in/out)'u+2n .. .AS Tcl_Interp Tcl_CreateInterp in/out .\" # BS - start boxed text .\" # ^y = starting y location .\" # ^b = 1 .de BS .br .mk ^y .nr ^b 1u .if n .nf .if n .ti 0 .if n \l'\\n(.lu\(ul' .if n .fi .. .\" # BE - end boxed text (draw box now) .de BE .nf .ti 0 .mk ^t .ie n \l'\\n(^lu\(ul' .el \{\ .\" Draw four-sided box normally, but don't draw top of .\" box if the box started on an earlier page. .ie !\\n(^b-1 \{\ \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul' .\} .el \}\ \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul' .\} .\} .fi .br .nr ^b 0 .. .\" # VS - start vertical sidebar .\" # ^Y = starting y location .\" # ^v = 1 (for troff; for nroff this doesn't matter) .de VS .if !"\\$2"" .br .mk ^Y .ie n 'mc \s12\(br\s0 .el .nr ^v 1u .. .\" # VE - end of vertical sidebar .de VE .ie n 'mc .el \{\ .ev 2 .nf .ti 0 .mk ^t \h'|\\n(^lu+3n'\L'|\\n(^Yu-1v\(bv'\v'\\n(^tu+1v-\\n(^Yu'\h'-|\\n(^lu+3n' .sp -1 .fi .ev .\} .nr ^v 0 .. .\" # Special macro to handle page bottom: finish off current .\" # box/sidebar if in box/sidebar mode, then invoked standard .\" # page bottom macro. .de ^B .ev 2 'ti 0 'nf .mk ^t .if \\n(^b \{\ .\" Draw three-sided box if this is the box's first page, .\" draw two sides but no top otherwise. .ie !\\n(^b-1 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c .el \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c .\} .if \\n(^v \{\ .nr ^x \\n(^tu+1v-\\n(^Yu \kx\h'-\\nxu'\h'|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'|0u'\c .\} .bp 'fi .ev .if \\n(^b \{\ .mk ^y .nr ^b 2 .\} .if \\n(^v \{\ .mk ^Y .\} .. .\" # DS - begin display .de DS .RS .nf .sp .. .\" # DE - end display .de DE .fi .RE .sp .. .\" # SO - start of list of standard options .de SO 'ie '\\$1'' .ds So \\fBoptions\\fR 'el .ds So \\fB\\$1\\fR .SH "STANDARD OPTIONS" .LP .nf .ta 5.5c 11c .ft B .. .\" # SE - end of list of standard options .de SE .fi .ft R .LP See the \\*(So manual entry for details on the standard options. .. .\" # OP - start of full description for a single option .de OP .LP .nf .ta 4c Command-Line Name: \\fB\\$1\\fR Database Name: \\fB\\$2\\fR Database Class: \\fB\\$3\\fR .fi .IP .. .\" # CS - begin code excerpt .de CS .RS .nf .ta .25i .5i .75i 1i .. .\" # CE - end code excerpt .de CE .fi .RE .. .\" # UL - underline word .de UL \\$1\l'|0\(ul'\\$2 .. .\" # QW - apply quotation marks to word .de QW .ie '\\*(lq'"' ``\\$1''\\$2 .\"" fix emacs highlighting .el \\*(lq\\$1\\*(rq\\$2 .. .\" # PQ - apply parens and quotation marks to word .de PQ .ie '\\*(lq'"' (``\\$1''\\$2)\\$3 .\"" fix emacs highlighting .el (\\*(lq\\$1\\*(rq\\$2)\\$3 .. .\" # QR - quoted range .de QR .ie '\\*(lq'"' ``\\$1''\\-``\\$2''\\$3 .\"" fix emacs highlighting .el \\*(lq\\$1\\*(rq\\-\\*(lq\\$2\\*(rq\\$3 .. .\" # MT - "empty" string .de MT .QW "" .. .BS .SH NAME doctools::idx::export \- Exporting keyword indices .SH SYNOPSIS package require \fBdoctools::idx::export ?0\&.2\&.1?\fR .sp package require \fBTcl 8\&.4\fR .sp package require \fBstruct::map \fR .sp package require \fBdoctools::idx::structure \fR .sp package require \fBsnit \fR .sp package require \fBpluginmgr \fR .sp \fB::doctools::idx::export\fR \fIobjectName\fR .sp \fBobjectName\fR \fBmethod\fR ?\fIarg arg \&.\&.\&.\fR? .sp \fIobjectName\fR \fBdestroy\fR .sp \fIobjectName\fR \fBexport serial\fR \fIserial\fR ?\fIformat\fR? .sp \fIobjectName\fR \fBexport object\fR \fIobject\fR ?\fIformat\fR? .sp \fIobjectName\fR \fBconfig names\fR .sp \fIobjectName\fR \fBconfig get\fR .sp \fIobjectName\fR \fBconfig set\fR \fIname\fR ?\fIvalue\fR? .sp \fIobjectName\fR \fBconfig unset\fR \fIpattern\fR\&.\&.\&. .sp \fBexport\fR \fIserial\fR \fIconfiguration\fR .sp .BE .SH DESCRIPTION This package provides a class to manage the plugins for the export of keyword indices to other formats, i\&.e\&. their conversion to, for example \fIdocidx\fR, \fIHTML\fR, etc\&. .PP This is one of the three public pillars the management of keyword indices resides on\&. The other two pillars are .IP [1] \fIImporting keyword indices\fR, and .IP [2] \fIHolding keyword indices\fR .PP .PP For information about the \fBConcepts\fR of keyword indices, and their parts, see the same-named section\&. For information about the data structure which is the major input to the manager objects provided by this package see the section \fBKeyword index serialization format\fR\&. .PP The plugin system of our class is based on the package \fBpluginmgr\fR, and configured to look for plugins using .IP [1] the environment variable \fBDOCTOOLS_IDX_EXPORT_PLUGINS\fR, .IP [2] the environment variable \fBDOCTOOLS_IDX_PLUGINS\fR, .IP [3] the environment variable \fBDOCTOOLS_PLUGINS\fR, .IP [4] the path "\fI~/\&.doctools/idx/export/plugin\fR" .IP [5] the path "\fI~/\&.doctools/idx/plugin\fR" .IP [6] the path "\fI~/\&.doctools/plugin\fR" .IP [7] the path "\fI~/\&.doctools/idx/export/plugins\fR" .IP [8] the path "\fI~/\&.doctools/idx/plugins\fR" .IP [9] the path "\fI~/\&.doctools/plugins\fR" .IP [10] the registry entry "HKEY_CURRENT_USER\\SOFTWARE\\DOCTOOLS\\IDX\\EXPORT\\PLUGINS" .IP [11] the registry entry "HKEY_CURRENT_USER\\SOFTWARE\\DOCTOOLS\\IDX\\PLUGINS" .IP [12] the registry entry "HKEY_CURRENT_USER\\SOFTWARE\\DOCTOOLS\\PLUGINS" .PP The last three are used only when the package is run on a machine using Windows(tm) operating system\&. .PP The whole system is delivered with six predefined export plugins, namely .TP docidx See \fIdocidx export plugin\fR for details\&. .TP html See \fIhtml export plugin\fR for details\&. .TP json See \fIjson export plugin\fR for details\&. .TP nroff See \fInroff export plugin\fR for details\&. .TP text See \fItext export plugin\fR for details\&. .TP wiki See \fIwiki export plugin\fR for details\&. .PP .PP Readers wishing to write their own export plugin for some format, i\&.e\&. \fIplugin writer\fRs reading and understanding the section containing the \fBExport plugin API v2 reference\fR is an absolute necessity, as it specifies the interaction between this package and its plugins in detail\&. .SH CONCEPTS .IP [1] A \fIkeyword index\fR consists of a (possibly empty) set of \fIkeywords\fR\&. .IP [2] Each keyword in the set is identified by its name\&. .IP [3] Each keyword has a (possibly empty) set of \fIreferences\fR\&. .IP [4] A reference can be associated with more than one keyword\&. .IP [5] A reference not associated with at least one keyword is not possible however\&. .IP [6] Each reference is identified by its target, specified as either an url or symbolic filename, depending on the type of reference (\fBurl\fR, or \fBmanpage\fR)\&. .IP [7] The type of a reference (url, or manpage) depends only on the reference itself, and not the keywords it is associated with\&. .IP [8] In addition to a type each reference has a descriptive label as well\&. This label depends only on the reference itself, and not the keywords it is associated with\&. .PP A few notes .IP [1] Manpage references are intended to be used for references to the documents the index is made for\&. Their target is a symbolic file name identifying the document, and export plugins may replace symbolic with actual file names, if specified\&. .IP [2] Url references are intended on the othre hand are inteded to be used for links to anything else, like websites\&. Their target is an url\&. .IP [3] While url and manpage references share a namespace for their identifiers, this should be no problem, given that manpage identifiers are symbolic filenames and as such they should never look like urls, the identifiers for url references\&. .PP .SH API .SS "PACKAGE COMMANDS" .TP \fB::doctools::idx::export\fR \fIobjectName\fR This command creates a new export manager object with an associated Tcl command whose name is \fIobjectName\fR\&. This \fIobject\fR command is explained in full detail in the sections \fBObject command\fR and \fBObject methods\fR\&. The object command will be created under the current namespace if the \fIobjectName\fR is not fully qualified, and in the specified namespace otherwise\&. .PP .SS "OBJECT COMMAND" All objects created by the \fB::doctools::idx::export\fR command have the following general form: .TP \fBobjectName\fR \fBmethod\fR ?\fIarg arg \&.\&.\&.\fR? The method \fBmethod\fR and its \fIarg\fR'uments determine the exact behavior of the command\&. See section \fBObject methods\fR for the detailed specifications\&. .PP .SS "OBJECT METHODS" .TP \fIobjectName\fR \fBdestroy\fR This method destroys the object it is invoked for\&. .TP \fIobjectName\fR \fBexport serial\fR \fIserial\fR ?\fIformat\fR? This method takes the canonical serialization of a keyword index stored in \fIserial\fR and converts it to the specified \fIformat\fR, using the export plugin for the format\&. An error is thrown if no plugin could be found for the format\&. The string generated by the conversion process is returned as the result of this method\&. .sp If no format is specified the method defaults to \fBdocidx\fR\&. .sp The specification of what a \fIcanonical\fR serialization is can be found in the section \fBKeyword index serialization format\fR\&. .sp The plugin has to conform to the interface specified in section \fBExport plugin API v2 reference\fR\&. .TP \fIobjectName\fR \fBexport object\fR \fIobject\fR ?\fIformat\fR? This method is a convenient wrapper around the \fBexport serial\fR method described by the previous item\&. It expects that \fIobject\fR is an object command supporting a \fBserialize\fR method returning the canonical serialization of a keyword index\&. It invokes that method, feeds the result into \fBexport serial\fR and returns the resulting string as its own result\&. .TP \fIobjectName\fR \fBconfig names\fR This method returns a list containing the names of all configuration variables currently known to the object\&. .TP \fIobjectName\fR \fBconfig get\fR This method returns a dictionary containing the names and values of all configuration variables currently known to the object\&. .TP \fIobjectName\fR \fBconfig set\fR \fIname\fR ?\fIvalue\fR? This method sets the configuration variable \fIname\fR to the specified \fIvalue\fR and returns the new value of the variable\&. .sp If no value is specified it simply returns the current value, without changing it\&. .sp Note that while the user can set the predefined configuration variables \fBuser\fR and \fBformat\fR doing so will have no effect, these values will be internally overridden when invoking an import plugin\&. .TP \fIobjectName\fR \fBconfig unset\fR \fIpattern\fR\&.\&.\&. This method unsets all configuration variables matching the specified glob \fIpattern\fRs\&. If no pattern is specified it will unset all currently defined configuration variables\&. .PP .SH "EXPORT PLUGIN API V2 REFERENCE" Plugins are what this package uses to manage the support for any output format beyond the \fBKeyword index serialization format\fR\&. Here we specify the API the objects created by this package use to interact with their plugins\&. .PP A plugin for this package has to follow the rules listed below: .IP [1] A plugin is a package\&. .IP [2] The name of a plugin package has the form doctools::idx::export::\fBFOO\fR, where \fBFOO\fR is the name of the format the plugin will generate output for\&. This name is also the argument to provide to the various \fBexport\fR methods of export manager objects to get a string encoding a keyword index in that format\&. .IP [3] The plugin can expect that the package \fBdoctools::idx::export::plugin\fR is present, as indicator that it was invoked from a genuine plugin manager\&. .IP [4] A plugin has to provide one command, with the signature shown below\&. .RS .TP \fBexport\fR \fIserial\fR \fIconfiguration\fR Whenever an export manager of \fBdoctools::idx\fR has to generate output for an index it will invoke this command\&. .RS .TP string \fIserial\fR This argument will contain the \fIcanonical\fR serialization of the index for which to generate the output\&. The specification of what a \fIcanonical\fR serialization is can be found in the section \fBKeyword index serialization format\fR\&. .TP dictionary \fIconfiguration\fR This argument will contain the current configuration to apply to the generation, as a dictionary mapping from variable names to values\&. .sp The following configuration variables have a predefined meaning all plugins have to obey, although they can ignore this information at their discretion\&. Any other other configuration variables recognized by a plugin will be described in the manpage for that plugin\&. .RS .TP user This variable is expected to contain the name of the user owning the process invoking the plugin\&. .TP format This variable is expected to contain the name of the format whose plugin is invoked\&. .TP file This variable, if defined by the user of the index object is expected to contain the name of the input file for which the plugin is generating its output for\&. .TP map This variable, if defined by the user of the index object is expected to contain a dictionary mapping from symbolic file names used in the references of type \fBmanpage\fR to actual paths (or urls)\&. A plugin has to be able to handle the possibility that a symbolic name is without entry in this mapping\&. .RE .RE .RE .IP [5] A single usage cycle of a plugin consists of the invokations of the command \fBexport\fR\&. This call has to leave the plugin in a state where another usage cycle can be run without problems\&. .PP .SH "KEYWORD INDEX SERIALIZATION FORMAT" Here we specify the format used by the doctools v2 packages to serialize keyword indices as immutable values for transport, comparison, etc\&. .PP We distinguish between \fIregular\fR and \fIcanonical\fR serializations\&. While a keyword index may have more than one regular serialization only exactly one of them will be \fIcanonical\fR\&. .PP .TP regular serialization .RS .IP [1] An index serialization is a nested Tcl dictionary\&. .IP [2] This dictionary holds a single key, \fBdoctools::idx\fR, and its value\&. This value holds the contents of the index\&. .IP [3] The contents of the index are a Tcl dictionary holding the title of the index, a label, and the keywords and references\&. The relevant keys and their values are .RS .TP \fBtitle\fR The value is a string containing the title of the index\&. .TP \fBlabel\fR The value is a string containing a label for the index\&. .TP \fBkeywords\fR The value is a Tcl dictionary, using the keywords known to the index as keys\&. The associated values are lists containing the identifiers of the references associated with that particular keyword\&. .sp Any reference identifier used in these lists has to exist as a key in the \fBreferences\fR dictionary, see the next item for its definition\&. .TP \fBreferences\fR The value is a Tcl dictionary, using the identifiers for the references known to the index as keys\&. The associated values are 2-element lists containing the type and label of the reference, in this order\&. .sp Any key here has to be associated with at least one keyword, i\&.e\&. occur in at least one of the reference lists which are the values in the \fBkeywords\fR dictionary, see previous item for its definition\&. .RE .IP [4] The \fItype\fR of a reference can be one of two values, .RS .TP \fBmanpage\fR The identifier of the reference is interpreted as symbolic file name, referring to one of the documents the index was made for\&. .TP \fBurl\fR The identifier of the reference is interpreted as an url, referring to some external location, like a website, etc\&. .RE .RE .TP canonical serialization The canonical serialization of a keyword index 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 the keyword index\&. .RS .IP [1] The keys found in all the nested Tcl dictionaries are sorted in ascending dictionary order, as generated by Tcl's builtin command \fBlsort -increasing -dict\fR\&. .IP [2] The references listed for each keyword of the index, if any, are listed in ascending dictionary order of their \fIlabels\fR, as generated by Tcl's builtin command \fBlsort -increasing -dict\fR\&. .RE .PP .SH "BUGS, IDEAS, FEEDBACK" This document, and the package it describes, will undoubtedly contain bugs and other problems\&. Please report such in the category \fIdoctools\fR of the \fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&. Please also report any ideas for enhancements you may have for either package and/or documentation\&. .PP When proposing code changes, please provide \fIunified diffs\fR, i\&.e the output of \fBdiff -u\fR\&. .PP Note further that \fIattachments\fR are strongly preferred over inlined patches\&. Attachments can be made by going to the \fBEdit\fR form of the ticket immediately after its creation, and then using the left-most button in the secondary navigation bar\&. .SH KEYWORDS HTML, conversion, docidx, documentation, export, formatting, generation, index, json, keyword index, manpage, markup, nroff, plugin, reference, tcler's wiki, text, url, wiki .SH CATEGORY Documentation tools .SH COPYRIGHT .nf Copyright (c) 2009-2019 Andreas Kupries .fi